Initial import.

Update to mbedtls 3.0.0.74217ee

mbedtls.mod/common.bmx

@@ -0,0 +1,460 @@
+' 
+' Copyright 2018-2021 Bruce A Henderson
+' 
+' Licensed under the Apache License, Version 2.0 (the "License");
+' you may not use this file except in compliance with the License.
+' You may obtain a copy of the License at
+' 
+'     http://www.apache.org/licenses/LICENSE-2.0
+' 
+' Unless required by applicable law or agreed to in writing, software
+' distributed under the License is distributed on an "AS IS" BASIS,
+' WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+' See the License for the specific language governing permissions and
+' limitations under the License.
+' 
+SuperStrict
+
+?win32
+Import "-lws2_32"
+?
+
+Import "source.bmx"
+
+
+Extern
+
+	Function mbedtls_strerror(errornum:Int, buf:Byte Ptr, Length:Int)
+
+	Function bmx_mbedtls_net_init:Byte Ptr()
+	Function bmx_mbedtls_net_free(handle:Byte Ptr)
+	Function bmx_mbedtls_net_delete(handle:Byte Ptr)
+	Function bmx_mbedtls_net_bind:Int(handle:Byte Ptr, bindIp:String, port:String, proto:Int)
+	Function bmx_mbedtls_net_connect:Int(handle:Byte Ptr, host:String, port:String, proto:Int)
+	Function bmx_mbedtls_net_poll:Int(handle:Byte Ptr, rw:Int, timeout:Int)
+	Function bmx_mbedtls_net_usleep(usec:UInt)
+	Function bmx_mbedtls_net_send:Int(handle:Byte Ptr, buf:Byte Ptr, Length:Size_T)
+	Function bmx_mbedtls_net_cbsend:Int(callback:Byte Ptr, handle:Byte Ptr, buf:Byte Ptr, Length:Size_T)
+	Function bmx_mbedtls_net_cbrecv:Int(callback:Byte Ptr, handle:Byte Ptr, buf:Byte Ptr, Length:Size_T)
+	Function bmx_mbedtls_net_cbtimeout:Int(callback:Byte Ptr, handle:Byte Ptr, buf:Byte Ptr, Length:Size_T, timeout:Int)
+	Function bmx_mbedtls_net_recv:Int(handle:Byte Ptr, buf:Byte Ptr, Length:Size_T)
+	Function bmx_mbedtls_net_recv_timeout:Int(handle:Byte Ptr, buf:Byte Ptr, Length:Size_T, timeout:UInt)
+	Function mbedtls_net_accept:Int(handle:Byte Ptr, client:Byte Ptr, buf:Byte Ptr, size:Size_T, Length:Size_T Ptr)
+	Function NetSend:Int(ctx:Object, buf:Byte Ptr, Length:Size_T) = "mbedtls_net_send"
+	Function NetRecv:Int(ctx:Object, buf:Byte Ptr, Length:Size_T) = "mbedtls_net_recv"
+
+	Function mbedtls_net_set_block:Int(handle:Byte Ptr)
+	Function mbedtls_net_set_nonblock:Int(handle:Byte Ptr)
+	Function mbedtls_debug_set_threshold(threshold:Int)
+	
+	Function bmx_mbedtls_ssl_init:Byte Ptr()
+	Function bmx_mbedtls_ssl_free(handle:Byte Ptr)
+	Function bmx_mbedtls_ssl_read:Int(handle:Byte Ptr, buf:Byte Ptr, Length:Size_T)
+	Function bmx_mbedtls_ssl_write:Int(handle:Byte Ptr, buf:Byte Ptr, Length:Size_T)
+	
+	Function mbedtls_ssl_setup:Int(handle:Byte Ptr, config:Byte Ptr)
+	Function mbedtls_ssl_session_reset:Int(handle:Byte Ptr)
+	Function mbedtls_ssl_set_bio(handle:Byte Ptr, ctx:Object, cbs:Byte Ptr, cbr:Byte Ptr, cbt:Byte Ptr)
+	Function mbedtls_ssl_set_timer_cb(handle:Byte Ptr, ctx:Object, cbs:Byte Ptr, cbg:Byte Ptr)
+	Function mbedtls_ssl_handshake:Int(handle:Byte Ptr)
+	Function mbedtls_ssl_handshake_step:Int(handle:Byte Ptr)
+	Function mbedtls_ssl_get_ciphersuite:Byte Ptr(handle:Byte Ptr)
+	Function mbedtls_ssl_get_verify_result:Int(handle:Byte Ptr)
+	Function mbedtls_ssl_get_bytes_avail:Size_T(handle:Byte Ptr)
+	Function mbedtls_ssl_get_version:Byte Ptr(handle:Byte Ptr)
+	Function mbedtls_ssl_get_record_expansion:Int(handle:Byte Ptr)
+	Function mbedtls_ssl_renegotiate:Int(handle:Byte Ptr)
+	Function mbedtls_ssl_close_notify:Int(handle:Byte Ptr)
+
+	Function bmx_mbedtls_ssl_config_init:Byte Ptr()
+	Function bmx_mbedtls_ssl_config_free(handle:Byte Ptr)
+
+	Function mbedtls_ssl_config_defaults:Int(handle:Byte Ptr, endpoint:Int, transport:Int, preset:Int)
+	Function mbedtls_ssl_conf_endpoint(handle:Byte Ptr, endpoint:Int)
+	Function mbedtls_ssl_conf_transport(handle:Byte Ptr, transport:Int)
+	Function mbedtls_ssl_conf_own_cert:Int(handle:Byte Ptr, cert:Byte Ptr, pkContext:Byte Ptr)
+
+	Function bmx_mbedtls_x509_crt_init:Byte Ptr()
+	Function bmx_mbedtls_x509_crt_free(handle:Byte Ptr)
+	Function bmx_mbedtls_x509_crt_parse:Int(handle:Byte Ptr, buf:Byte Ptr, buflen:Int)
+	
+	Function bmx_mbedtls_pk_init:Byte Ptr()
+	Function bmx_mbedtls_pk_free(handle:Byte Ptr)
+	Function bmx_mbedtls_pk_parse_key:Int(handle:Byte Ptr, key:Byte Ptr, keylen:Int, pwd:Byte Ptr, pwdlen:Int, cb:Byte Ptr, rng:Byte Ptr)
+	Function bmx_mbedtls_pk_parse_key_string:Int(handle:Byte Ptr, key:String, pwd:String, cb:Byte Ptr, rng:Byte Ptr)
+	
+	Function bmx_mbedtls_ctr_drbg_init:Byte Ptr()
+	Function bmx_mbedtls_ctr_drbg_free(handle:Byte Ptr)
+	
+	Function bmx_mbedtls_entropy_init:Byte Ptr()
+	Function bmx_mbedtls_entropy_free(handle:Byte Ptr)
+	
+	Rem
+	bbdoc: Retrieves entropy from the accumulator.
+	returns: 0 if successful, or #MBEDTLS_ERR_ENTROPY_SOURCE_FAILED
+	about: (Maximum length: #MBEDTLS_ENTROPY_BLOCK_SIZE
+	End Rem
+	Function EntropyFunc:Int(entropy:Object, output:Byte Ptr, Length:Size_T) = "mbedtls_entropy_func"
+	Function mbedtls_ctr_drbg_seed:Int(handle:Byte Ptr, cb:Byte Ptr, entropy:Byte Ptr, custom:Byte Ptr, Length:Size_T)
+	Function bmx_mbedtls_ctr_drbg_seed:Int(handle:Byte Ptr, cb:Byte Ptr, entropy:Object, custom:Byte Ptr, Length:Size_T)
+	
+	Function RandomFunc:Int(rng:Object, output:Byte Ptr, Length:Size_T) = "mbedtls_ctr_drbg_random"
+	Function mbedtls_ssl_conf_rng(handle:Byte Ptr, cb:Byte Ptr, rng:Byte Ptr)
+	Function bmx_mbedtls_ssl_conf_rng(handle:Byte Ptr, cb:Byte Ptr, rng:Object)
+	Function mbedtls_ssl_conf_dbg(handle:Byte Ptr, cb:Byte Ptr, dbg:Object)
+	Function mbedtls_ssl_conf_ca_chain(handle:Byte Ptr, chain:Byte Ptr, crl:Byte Ptr)
+
+End Extern
+
+Rem
+bbdoc: Failed to open a socket.
+End Rem
+Const MBEDTLS_ERR_NET_SOCKET_FAILED:Int = -$0042 
+Rem
+bbdoc: The connection to the given server / port failed.
+end rem
+Const MBEDTLS_ERR_NET_CONNECT_FAILED:Int = -$0044 
+Rem
+bbdoc: Binding of the socket failed.
+end rem
+Const MBEDTLS_ERR_NET_BIND_FAILED:Int = -$0046 
+Rem
+bbdoc: Could not listen on the socket.
+end rem
+Const MBEDTLS_ERR_NET_LISTEN_FAILED:Int = -$0048 
+Rem
+bbdoc: Could not accept the incoming connection.
+end rem
+Const MBEDTLS_ERR_NET_ACCEPT_FAILED:Int = -$004A 
+Rem
+bbdoc: Reading information from the socket failed.
+end rem
+Const MBEDTLS_ERR_NET_RECV_FAILED:Int = -$004C 
+Rem
+bbdoc: Sending information through the socket failed.
+end rem
+Const MBEDTLS_ERR_NET_SEND_FAILED:Int = -$004E 
+Rem
+bbdoc: Connection was reset by peer.
+end rem
+Const MBEDTLS_ERR_NET_CONN_RESET:Int = -$0050 
+Rem
+bbdoc: Failed to get an IP address for the given hostname.
+end rem
+Const MBEDTLS_ERR_NET_UNKNOWN_HOST:Int = -$0052 
+Rem
+bbdoc: Buffer is too small to hold the data.
+end rem
+Const MBEDTLS_ERR_NET_BUFFER_TOO_SMALL:Int = -$0043 
+Rem
+bbdoc: The context is invalid, eg because it was free()ed.
+end rem
+Const MBEDTLS_ERR_NET_INVALID_CONTEXT:Int = -$0045 
+Rem
+bbdoc: Polling the net context failed.
+End Rem
+Const MBEDTLS_ERR_NET_POLL_FAILED:Int = -$0047
+Rem
+bbdoc: Input invalid.
+End Rem
+Const MBEDTLS_ERR_NET_BAD_INPUT_DATA:Int = -$0049
+
+Rem
+bbdoc: The backlog that listen() should use.
+end rem
+Const MBEDTLS_NET_LISTEN_BACKLOG:Int = 10
+
+Rem
+bbdoc: The TCP transport protocol
+end rem
+Const MBEDTLS_NET_PROTO_TCP:Int = 0
+Rem
+bbdoc: The UDP transport protocol
+end rem
+Const MBEDTLS_NET_PROTO_UDP:Int = 1
+
+Rem
+bbdoc: Used in mbedtls_net_poll to check for pending data
+end rem
+Const MBEDTLS_NET_POLL_READ:Int = 1
+Rem
+bbdoc: Used in mbedtls_net_poll to check if write possible
+end rem
+Const MBEDTLS_NET_POLL_WRITE:Int = 2
+
+
+Rem
+bbdoc: The requested feature is not available.
+end rem
+Const MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE:Int = -$7080 
+Rem
+bbdoc: Bad input parameters to function.
+end rem
+Const MBEDTLS_ERR_SSL_BAD_INPUT_DATA:Int = -$7100 
+Rem
+bbdoc: Verification of the message MAC failed.
+end rem
+Const MBEDTLS_ERR_SSL_INVALID_MAC:Int = -$7180 
+Rem
+bbdoc: An invalid SSL record was received.
+end rem
+Const MBEDTLS_ERR_SSL_INVALID_RECORD:Int = -$7200 
+Rem
+bbdoc: The connection indicated an EOF.
+end rem
+Const MBEDTLS_ERR_SSL_CONN_EOF:Int = -$7280 
+Rem
+bbdoc: An unknown cipher was received.
+end rem
+Const MBEDTLS_ERR_SSL_UNKNOWN_CIPHER:Int = -$7300 
+Rem
+bbdoc: The server has no ciphersuites in common with the client.
+end rem
+Const MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN:Int = -$7380 
+Rem
+bbdoc: No RNG was provided to the SSL module.
+end rem
+Const MBEDTLS_ERR_SSL_NO_RNG:Int = -$7400 
+Rem
+bbdoc: No client certification received from the client, but required by the authentication mode.
+end rem
+Const MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE:Int = -$7480 
+Rem
+bbdoc: Our own certificate(s) is/are too large to send in an SSL message.
+end rem
+Const MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE:Int = -$7500 
+Rem
+bbdoc: The own certificate is not set, but needed by the server.
+end rem
+Const MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED:Int = -$7580 
+Rem
+bbdoc: The own private key or pre-shared key is not set, but needed.
+end rem
+Const MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED:Int = -$7600 
+Rem
+bbdoc: No CA Chain is set, but required to operate.
+end rem
+Const MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED:Int = -$7680 
+Rem
+bbdoc: An unexpected message was received from our peer.
+end rem
+Const MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE:Int = -$7700 
+Rem
+bbdoc: A fatal alert message was received from our peer.
+end rem
+Const MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE:Int = -$7780 
+Rem
+bbdoc: Verification of our peer failed.
+end rem
+Const MBEDTLS_ERR_SSL_PEER_VERIFY_FAILED:Int = -$7800 
+Rem
+bbdoc: The peer notified us that the connection is going to be closed.
+end rem
+Const MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:Int = -$7880 
+Rem
+bbdoc: Processing of the ClientHello handshake message failed.
+end rem
+Const MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO:Int = -$7900 
+Rem
+bbdoc: Processing of the ServerHello handshake message failed.
+end rem
+Const MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO:Int = -$7980 
+Rem
+bbdoc: Processing of the Certificate handshake message failed.
+end rem
+Const MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE:Int = -$7A00
+Rem
+bbdoc: Memory allocation failed
+end rem
+Const MBEDTLS_ERR_SSL_ALLOC_FAILED:Int = -$7F00 
+Rem
+bbdoc: Hardware acceleration function returned with error
+end rem
+Const MBEDTLS_ERR_SSL_HW_ACCEL_FAILED:Int = -$7F80 
+Rem
+bbdoc: Hardware acceleration function skipped / left alone data
+end rem
+Const MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH:Int = -$6F80 
+Rem
+bbdoc: Processing of the compression / decompression failed
+end rem
+Const MBEDTLS_ERR_SSL_COMPRESSION_FAILED:Int = -$6F00 
+Rem
+bbdoc: Handshake protocol not within min/max boundaries
+end rem
+Const MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION:Int = -$6E80 
+Rem
+bbdoc: Processing of the NewSessionTicket handshake message failed.
+end rem
+Const MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET:Int = -$6E00 
+Rem
+bbdoc: Session ticket has expired.
+end rem
+Const MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED:Int = -$6D80 
+Rem
+bbdoc: Public key type mismatch (eg, asked for RSA key exchange and presented EC key)
+end rem
+Const MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH:Int = -$6D00 
+Rem
+bbdoc: Unknown identity received (eg, PSK identity)
+end rem
+Const MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY:Int = -$6C80 
+Rem
+bbdoc: Internal error (eg, unexpected failure in lower-level module)
+end rem
+Const MBEDTLS_ERR_SSL_INTERNAL_ERROR:Int = -$6C00 
+Rem
+bbdoc: A counter would wrap (eg, too many messages exchanged).
+end rem
+Const MBEDTLS_ERR_SSL_COUNTER_WRAPPING:Int = -$6B80 
+Rem
+bbdoc: Unexpected message at ServerHello in renegotiation.
+end rem
+Const MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO:Int = -$6B00 
+Rem
+bbdoc: DTLS client must retry for hello verification
+end rem
+Const MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED:Int = -$6A80 
+Rem
+bbdoc: A buffer is too small to receive or write a message
+end rem
+Const MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL:Int = -$6A00 
+Rem
+bbdoc: Connection requires a read call.
+end rem
+Const MBEDTLS_ERR_SSL_WANT_READ:Int = -$6900 
+Rem
+bbdoc: Connection requires a write call.
+end rem
+Const MBEDTLS_ERR_SSL_WANT_WRITE:Int = -$6880 
+Rem
+bbdoc: The operation timed out.
+end rem
+Const MBEDTLS_ERR_SSL_TIMEOUT:Int = -$6800 
+Rem
+bbdoc: The client initiated a reconnect from the same port.
+end rem
+Const MBEDTLS_ERR_SSL_CLIENT_RECONNECT:Int = -$6780 
+Rem
+bbdoc: Record header looks valid but is not expected.
+end rem
+Const MBEDTLS_ERR_SSL_UNEXPECTED_RECORD:Int = -$6700 
+Rem
+bbdoc: The alert message received indicates a non-fatal error.
+end rem
+Const MBEDTLS_ERR_SSL_NON_FATAL:Int = -$6680 
+Rem
+bbdoc: Couldn't set the hash for verifying CertificateVerify
+end rem
+Const MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH:Int = -$6600 
+Rem
+bbdoc: Internal-only message signaling that further message-processing should be done
+end rem
+Const MBEDTLS_ERR_SSL_CONTINUE_PROCESSING:Int = -$6580
+Rem
+bbdoc: The asynchronous operation is not completed yet.
+end rem
+Const MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS:Int = -$6500
+Rem
+bbdoc: Internal-only message signaling that a message arrived early.
+end rem
+Const MBEDTLS_ERR_SSL_EARLY_MESSAGE:Int = -$6480
+Rem
+bbdoc: An encrypted DTLS-frame with an unexpected CID was received.
+end rem
+Const MBEDTLS_ERR_SSL_UNEXPECTED_CID:Int = -$6000
+Rem
+bbdoc: An operation failed due to an unexpected version or configuration.
+end rem
+Const MBEDTLS_ERR_SSL_VERSION_MISMATCH:Int = -$5F00
+Rem
+bbdoc: Invalid value in SSL config */
+end rem
+Const MBEDTLS_ERR_SSL_BAD_CONFIG:Int = -$5E80
+
+Const MBEDTLS_SSL_IS_CLIENT:Int = 0
+Const MBEDTLS_SSL_IS_SERVER:Int = 1
+
+Const MBEDTLS_SSL_IS_NOT_FALLBACK:Int = 0
+Const MBEDTLS_SSL_IS_FALLBACK:Int = 1
+
+Const MBEDTLS_SSL_EXTENDED_MS_DISABLED:Int = 0
+Const MBEDTLS_SSL_EXTENDED_MS_ENABLED:Int = 1
+
+Const MBEDTLS_SSL_ETM_DISABLED:Int = 0
+Const MBEDTLS_SSL_ETM_ENABLED:Int = 1
+
+Const MBEDTLS_SSL_COMPRESS_NULL:Int = 0
+Const MBEDTLS_SSL_COMPRESS_DEFLATE:Int = 1
+
+Const MBEDTLS_SSL_VERIFY_NONE:Int = 0
+Const MBEDTLS_SSL_VERIFY_OPTIONAL:Int = 1
+Const MBEDTLS_SSL_VERIFY_REQUIRED:Int = 2
+Const MBEDTLS_SSL_VERIFY_UNSET:Int = 3
+
+Const MBEDTLS_SSL_LEGACY_RENEGOTIATION:Int = 0
+Const MBEDTLS_SSL_SECURE_RENEGOTIATION:Int = 1
+
+Const MBEDTLS_SSL_RENEGOTIATION_DISABLED:Int = 0
+Const MBEDTLS_SSL_RENEGOTIATION_ENABLED:Int = 1
+
+Const MBEDTLS_SSL_ANTI_REPLAY_DISABLED:Int = 0
+Const MBEDTLS_SSL_ANTI_REPLAY_ENABLED:Int = 1
+
+Const MBEDTLS_SSL_RENEGOTIATION_NOT_ENFORCED:Int = -1
+Const MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT:Int = 16
+
+Const MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:Int = 0
+Const MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:Int = 1
+Const MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:Int = 2
+
+Const MBEDTLS_SSL_TRUNC_HMAC_DISABLED:Int = 0
+Const MBEDTLS_SSL_TRUNC_HMAC_ENABLED:Int = 1
+Const MBEDTLS_SSL_TRUNCATED_HMAC_LEN:Int = 10
+
+Const MBEDTLS_SSL_SESSION_TICKETS_DISABLED:Int = 0
+Const MBEDTLS_SSL_SESSION_TICKETS_ENABLED:Int = 1
+
+Const MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED:Int = 0
+Const MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED:Int = 1
+
+Const MBEDTLS_SSL_ARC4_ENABLED:Int = 0
+Const MBEDTLS_SSL_ARC4_DISABLED:Int = 1
+
+Const MBEDTLS_SSL_PRESET_DEFAULT:Int = 0
+Const MBEDTLS_SSL_PRESET_SUITEB:Int = 2
+
+Const MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED:Int = 1
+Const MBEDTLS_SSL_CERT_REQ_CA_LIST_DISABLED:Int = 0
+
+Const MBEDTLS_SSL_MAJOR_VERSION_3:Int = 3
+Rem
+bbdoc: SSL v3.0
+end rem
+Const MBEDTLS_SSL_MINOR_VERSION_0:Int = 0  
+Rem
+bbdoc: TLS v1.0
+end rem
+Const MBEDTLS_SSL_MINOR_VERSION_1:Int = 1  
+Rem
+bbdoc: TLS v1.1
+end rem
+Const MBEDTLS_SSL_MINOR_VERSION_2:Int = 2  
+Rem
+bbdoc: TLS v1.2
+end rem
+Const MBEDTLS_SSL_MINOR_VERSION_3:Int = 3  
+
+Rem
+bbdoc: TLS     
+end rem
+Const MBEDTLS_SSL_TRANSPORT_STREAM:Int = 0  
+Rem
+bbdoc: DTLS    
+end rem
+Const MBEDTLS_SSL_TRANSPORT_DATAGRAM:Int = 1  
+
+Rem
+bbdoc: Maximum host name defined in RFC 1035
+end rem
+Const MBEDTLS_SSL_MAX_HOST_NAME_LEN:Int = 255

mbedtls.mod/examples/cert.pem

@@ -0,0 +1,24 @@
+Anything outside BEGIN and END blocks should be ignored
+
+SHA256 server certificate:
+
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

mbedtls.mod/examples/privkey.pem

@@ -0,0 +1,31 @@
+Anything outside BEGIN and END blocks should be ignored
+
+RSA private key for the certificate that's in cert.pem:
+
+-----BEGIN RSA PRIVATE KEY-----
+MIIEpAIBAAKCAQEAwU2j3efNHdEE10lyuJmsDnjkOjxKzzoTFtBa5M2jAIin7h5r
+lqdStJDvLXJ6PiSa/LY0rCT1d+AmZIycsCh9odrqjObJHJa8/sEEUrM21KP64bF2
+2JDBYbRmUjaiJlOqq3ReB30Zgtsq2B+g2Q0cLUlm91slc0boC4pPaQy1AJDh2oIQ
+Zn2uVCuLZXmRoeJhw81ASQjuaAzxi4bSRr/QuKoRAx5/VqgaHkQYDw+Fi9qLRF7i
+GMZiL8dmjfpd2H3zJ4kpAcWQDj8n8TDISg7v1t7HxydrxwU9esQCPJodPg/oNJhb
+y3NLUpbYEaIsgIhpOVrTD7DeWS8Rx/fqEgEwlwIDAQABAoIBAQCXR0S8EIHFGORZ
+++AtOg6eENxD+xVs0f1IeGz57Tjo3QnXX7VBZNdj+p1ECvhCE/G7XnkgU5hLZX+G
+Z0jkz/tqJOI0vRSdLBbipHnWouyBQ4e/A1yIJdlBtqXxJ1KE/ituHRbNc4j4kL8Z
+/r6pvwnTI0PSx2Eqs048YdS92LT6qAv4flbNDxMn2uY7s4ycS4Q8w1JXnCeaAnYm
+WYI5wxO+bvRELR2Mcz5DmVnL8jRyml6l6582bSv5oufReFIbyPZbQWlXgYnpu6He
+GTc7E1zKYQGG/9+DQUl/1vQuCPqQwny0tQoX2w5tdYpdMdVm+zkLtbajzdTviJJa
+TWzL6lt5AoGBAN86+SVeJDcmQJcv4Eq6UhtRr4QGMiQMz0Sod6ettYxYzMgxtw28
+CIrgpozCc+UaZJLo7UxvC6an85r1b2nKPCLQFaggJ0H4Q0J/sZOhBIXaoBzWxveK
+nupceKdVxGsFi8CDy86DBfiyFivfBj+47BbaQzPBj7C4rK7UlLjab2rDAoGBAN2u
+AM2gchoFiu4v1HFL8D7lweEpi6ZnMJjnEu/dEgGQJFjwdpLnPbsj4c75odQ4Gz8g
+sw9lao9VVzbusoRE/JGI4aTdO0pATXyG7eG1Qu+5Yc1YGXcCrliA2xM9xx+d7f+s
+mPzN+WIEg5GJDYZDjAzHG5BNvi/FfM1C9dOtjv2dAoGAF0t5KmwbjWHBhcVqO4Ic
+BVvN3BIlc1ue2YRXEDlxY5b0r8N4XceMgKmW18OHApZxfl8uPDauWZLXOgl4uepv
+whZC3EuWrSyyICNhLY21Ah7hbIEBPF3L3ZsOwC+UErL+dXWLdB56Jgy3gZaBeW7b
+vDrEnocJbqCm7IukhXHOBK8CgYEAwqdHB0hqyNSzIOGY7v9abzB6pUdA3BZiQvEs
+3LjHVd4HPJ2x0N8CgrBIWOE0q8+0hSMmeE96WW/7jD3fPWwCR5zlXknxBQsfv0gP
+3BC5PR0Qdypz+d+9zfMf625kyit4T/hzwhDveZUzHnk1Cf+IG7Q+TOEnLnWAWBED
+ISOWmrUCgYAFEmRxgwAc/u+D6t0syCwAYh6POtscq9Y0i9GyWk89NzgC4NdwwbBH
+4AgahOxIxXx2gxJnq3yfkJfIjwf0s2DyP0kY2y6Ua1OeomPeY9mrIS4tCuDQ6LrE
+TB6l9VGoxJL4fyHnZb8L5gGvnB1bbD8cL6YPaDiOhcRseC9vBiEuVg==
+-----END RSA PRIVATE KEY-----

mbedtls.mod/examples/ssl_server.bmx

@@ -0,0 +1,248 @@
+SuperStrict
+
+Framework net.mbedtls
+Import brl.standardio
+
+Const HTTP_RESPONSE:String = "HTTP/1.0 200 OK~r~nContent-Type: text/html~r~n~r~n" + ..
+    "<h2>mbed TLS Test Server</h2>~r~n" + ..
+    "<p>Successful connection using: %s</p>~r~n"
+
+Local listen:TNetContext = New TNetContext.Create()
+Local client:TNetContext = New TNetContext.Create()
+
+Local ssl:TSSLContext = New TSSLContext.Create()
+Local config:TSSLConfig = New TSSLConfig.Create()
+
+Local cert:TX509Cert = New TX509Cert.Create()
+Local pk:TPkContext = New TPkContext.Create()
+
+Local entropy:TEntropyContext = New TEntropyContext.Create()
+Local rctx:TRandContext = New TRandContext.Create()
+
+' 1. Load the certificates and private RSA key
+
+Print "  . Loading the server cert. and key..."
+
+Local res:Int = cert.ParseFile("cert.pem")
+
+If res Then
+	Print " failed~n  !  TX509Cert.Parse() returned " + res
+	Fail(res)
+End If
+
+res = pk.ParseKeyFile("privkey.pem")
+
+If res Then
+	Print " failed~n  !  TPkContext.ParseKey() returned " + res
+	Fail(res)
+End If
+
+Print " ok"
+
+' 2. Setup the listening TCP socket
+
+Print "  . Bind on https://localhost:4433/ ..."
+
+res = listen.Bind(Null, "4433", MBEDTLS_NET_PROTO_TCP)
+
+If res Then
+	Print " failed~n  !  TNetContext.Bind() returned " + res
+	Fail(res)
+End If
+
+Print " ok"
+
+' 3. Seed the RNG
+
+Print "  . Seeding the random number generator..."
+
+res = rctx.Seed(EntropyFunc, entropy)
+
+If res Then
+	Print " failed~n  !  TRandContext.Seed() returned " + res
+	Fail(res)
+End If
+
+Print " ok"
+
+' 4. Setup stuff
+
+Print "  . Setting up the SSL data...."
+
+res = config.Defaults(MBEDTLS_SSL_IS_SERVER, MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT)
+
+If res Then
+	Print " failed~n  !  TSSLConfig.Defaults() returned " + res
+	Fail(res)
+End If
+
+config.RNG(RandomFunc, rctx)
+config.DBG(myDebug, Null)
+config.SetDebugThreshold(0)
+
+config.CaChain(cert, Null)
+
+res = config.OwnCert(cert, pk)
+
+If res Then
+	Print " failed~n  !  TSSLConfig.OwnCert() returned " + res
+	Fail(res)
+End If
+
+res = ssl.Setup(config)
+
+If res Then
+	Print " failed~n  !  TSSLContext.Setup() returned " + res
+	Fail(res)
+End If
+
+Print " ok"
+
+#Reset
+While True
+
+	If res <> 0 Then
+		Print "Last error was " + res + " - " + MBEDTLSError(res)
+	End If
+
+	client.Free()
+	ssl.SessionReset()
+	
+	' 5. Wait until a client connects
+	
+	Print "  . Waiting for a remote connection ..."
+	
+	Local clientIp:String
+	
+	res = listen.Accept(client, clientIp)
+	
+	If res Then
+		Print " failed~n  !  TSSLNetContext.Accept() returned " + res
+		Fail(res)
+	End If
+	
+	ssl.SetBio(client, NetSend, NetRecv, Null)
+	
+	Print " ok"
+	
+	' 6. Handshake
+	
+	Print "  . Performing the SSL/TLS handshake..."
+	
+	res = ssl.Handshake()
+
+	While res
+	
+		If res <> MBEDTLS_ERR_SSL_WANT_READ And res <> MBEDTLS_ERR_SSL_WANT_WRITE Then
+			Print " failed~n  !  TSSLContext.Handshake() returned " + res
+			Continue reset
+		End If
+		
+		res = ssl.Handshake()
+	Wend
+
+
+	Print " ok"
+	
+	' 7. Read the HTTP Request
+	
+	Print "  < Read from client:"
+	
+	Local buf:Byte[1024]
+	
+	While True
+	
+?bmxng
+		Local Length:Size_T = buf.Length - 1
+		MemClear(buf, Size_T(buf.Length))
+?Not bmxng
+		Local Length:Int = buf.Length - 1
+		MemClear(buf, buf.Length)
+?	
+		res = ssl.Read(buf, Length)
+		
+		If res = MBEDTLS_ERR_SSL_WANT_READ Or res = MBEDTLS_ERR_SSL_WANT_WRITE Then
+			Continue
+		End If
+		
+		If res <= 0 Then
+			Select res
+				Case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY
+					Print " connection was closed gracefully"
+				Case MBEDTLS_ERR_NET_CONN_RESET
+					Print " connection was reset by peer"
+				Default
+					Print " TSSLContext.Read() returned " + res
+			End Select
+			
+			Exit
+		End If
+		
+		length = res
+		
+		Print length + " bytes read~n~n" + String.fromUTF8String(buf)
+	
+		If res > 0 Then
+			Exit
+		End If
+	Wend
+	
+	' 8. Write the 200 Response
+	
+	Print "  > Write to client:"
+	
+	Local response:String = HTTP_RESPONSE.Replace("%s", ssl.GetCipherSuite())
+?bmxng
+	Local Length:Size_T = response.Length
+?Not bmxng
+	Local Length:Int = response.Length
+?
+	
+	Local out:Byte Ptr = response.ToUtf8String()
+	
+	res = ssl.Write(out, Length)
+	
+	While res <= 0
+	
+		If res = MBEDTLS_ERR_NET_CONN_RESET Then
+			Exit
+		End If
+		
+		If res <> MBEDTLS_ERR_SSL_WANT_READ And res <> MBEDTLS_ERR_SSL_WANT_WRITE Then
+			Exit
+		End If
+	
+		res = ssl.Write(out, length)
+	Wend
+	
+	length = res
+	
+	Print length + " bytes written"
+	
+	Print "  . Closing the connection..."
+	
+	res = ssl.CloseNotify()
+	
+	While res < 0
+	
+		If res <> MBEDTLS_ERR_SSL_WANT_READ And res <> MBEDTLS_ERR_SSL_WANT_WRITE Then
+			Print " failed~n  !  TSSLContext.CloseNotify() returned " + res
+			Continue reset
+		End If
+	
+		res = ssl.CloseNotify()
+	Wend
+	
+	Print " ok"
+	res = 0
+	
+Wend
+
+Function Fail(error:Int)
+	End
+End Function
+
+Function myDebug(ctx:Object, level:Int, file:String, line:Int, str:String)
+	Print file + ":" + line + ":  " + str.Replace("~n","")
+End Function
+

mbedtls.mod/glue.c

@@ -0,0 +1,248 @@
+/*
+  Copyright 2018-2021 Bruce A Henderson
+  
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+  
+      http://www.apache.org/licenses/LICENSE-2.0
+  
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+#include "mbedtls/net_sockets.h"
+#include "mbedtls/x509.h"
+#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/entropy.h"
+#include "brl.mod/blitz.mod/blitz.h"
+
+mbedtls_net_context * bmx_mbedtls_net_init() {
+	mbedtls_net_context * context = (mbedtls_net_context *)malloc(sizeof(mbedtls_net_context));
+	mbedtls_net_init(context);
+	return context;
+}
+
+void bmx_mbedtls_net_free(mbedtls_net_context * context) {
+	mbedtls_net_free(context);
+}
+
+void bmx_mbedtls_net_delete(mbedtls_net_context * context) {
+	free(context);
+}
+
+int bmx_mbedtls_net_bind(mbedtls_net_context * context, BBString * bindIp, BBString * port, int proto) {
+	char * b = NULL;
+	if (bindIp != &bbEmptyString) {
+		b = bbStringToUTF8String(bindIp);
+	}
+	char * p = NULL;
+	if (port != &bbEmptyString) {
+		p = bbStringToUTF8String(port);
+	}
+	int res = mbedtls_net_bind(context, b, p, proto);
+	bbMemFree(p);
+	bbMemFree(b);
+	return res;
+}
+
+int bmx_mbedtls_net_connect(mbedtls_net_context * context, BBString * host, BBString * port, int proto) {
+	char * h = NULL;
+	if (host != &bbEmptyString) {
+		h = bbStringToUTF8String(host);
+	}
+	char * p = NULL;
+	if (port != &bbEmptyString) {
+		p = bbStringToUTF8String(port);
+	}
+	int res = mbedtls_net_connect(context, h, p, proto);
+	bbMemFree(p);
+	bbMemFree(h);
+	return res;
+}
+
+#ifdef BMX_NG
+int bmx_mbedtls_net_recv(mbedtls_net_context * context, char * buf, size_t length) {
+#else
+int bmx_mbedtls_net_recv(mbedtls_net_context * context, char * buf, int length) {
+#endif
+	return mbedtls_net_recv(context, buf, length);
+}
+
+#ifdef BMX_NG
+int bmx_mbedtls_net_recv_timeout(mbedtls_net_context * context, char * buf, size_t length, uint32_t timeout) {
+#else
+int bmx_mbedtls_net_recv_timeout(mbedtls_net_context * context, char * buf, int length, int timeout) {
+#endif
+	return mbedtls_net_recv_timeout(context, buf, length, timeout);
+}
+
+#ifdef BMX_NG
+int bmx_mbedtls_net_send(mbedtls_net_context * context, char * buf, size_t length) {
+#else
+int bmx_mbedtls_net_send(mbedtls_net_context * context, char * buf, int length) {
+#endif
+	return mbedtls_net_send(context, buf, length);
+}
+
+#ifdef BMX_NG
+void bmx_mbedtls_net_usleep(uint32_t usec) {
+#else
+void bmx_mbedtls_net_usleep(int usec) {
+#endif
+	mbedtls_net_usleep(usec);
+}
+
+int bmx_mbedtls_net_poll(mbedtls_net_context * context, int rw, int timeout) {
+	return mbedtls_net_poll(context, rw, timeout);
+}
+
+int bmx_mbedtls_net_cbsend(mbedtls_ssl_send_t * send, void * context, char * buf, size_t length) {
+	return send(context, buf, length);
+}
+
+int bmx_mbedtls_net_cbrecv(mbedtls_ssl_recv_t * recv, void * context, char * buf, size_t length) {
+	return recv(context, buf, length);
+}
+
+
+int bmx_mbedtls_net_cbtimeout(mbedtls_ssl_recv_timeout_t * recvtimeout, void * context, char * buf, size_t length, int timeout) {
+	return recvtimeout(context, buf, length, timeout);
+}
+
+// --------------------------------------------------------
+
+mbedtls_ssl_context * bmx_mbedtls_ssl_init() {
+	mbedtls_ssl_context * context = (mbedtls_ssl_context *)malloc(sizeof(mbedtls_ssl_context));
+	mbedtls_ssl_init(context);
+	return context;
+}
+
+void bmx_mbedtls_ssl_free(mbedtls_ssl_context * context) {
+	mbedtls_ssl_free(context);
+	free(context);
+}
+
+#ifdef BMX_NG
+int bmx_mbedtls_ssl_read(mbedtls_ssl_context * context, char * buf, size_t length) {
+#else
+int bmx_mbedtls_ssl_read(mbedtls_ssl_context * context, char * buf, int length) {
+#endif
+	return mbedtls_ssl_read(context, buf, length);
+}
+
+#ifdef BMX_NG
+int bmx_mbedtls_ssl_write(mbedtls_ssl_context * context, char * buf, size_t length) {
+#else
+int bmx_mbedtls_ssl_write(mbedtls_ssl_context * context, char * buf, int length) {
+#endif
+	return mbedtls_ssl_write(context, buf, length);
+}
+
+
+// --------------------------------------------------------
+
+mbedtls_ssl_config * bmx_mbedtls_ssl_config_init() {
+	mbedtls_ssl_config * config = (mbedtls_ssl_config *)malloc(sizeof(mbedtls_ssl_config));
+	mbedtls_ssl_config_init(config);
+	return config;
+}
+
+void bmx_mbedtls_ssl_config_free(mbedtls_ssl_config * config) {
+	mbedtls_ssl_config_free(config);
+	free(config);
+}
+
+void bmx_mbedtls_ssl_conf_rng(mbedtls_ssl_config * config, int (*f_rng)(void *, unsigned char *, size_t), void *rng) {
+	mbedtls_ssl_conf_rng(config, f_rng, rng);
+}
+
+// --------------------------------------------------------
+
+mbedtls_x509_crt * bmx_mbedtls_x509_crt_init() {
+	mbedtls_x509_crt * cert = (mbedtls_x509_crt *)malloc(sizeof(mbedtls_x509_crt));
+	mbedtls_x509_crt_init(cert);
+	return cert;
+}
+
+void bmx_mbedtls_x509_crt_free(mbedtls_x509_crt * cert) {
+	mbedtls_x509_crt_free(cert);
+	free(cert);
+}
+
+int bmx_mbedtls_x509_crt_parse(mbedtls_x509_crt * cert, char * buf, int buflen) {
+	return mbedtls_x509_crt_parse(cert, buf, buflen);
+}
+
+// --------------------------------------------------------
+
+mbedtls_pk_context * bmx_mbedtls_pk_init() {
+	mbedtls_pk_context * context = (mbedtls_pk_context *)malloc(sizeof(mbedtls_pk_context));
+	mbedtls_pk_init(context);
+	return context;
+}
+
+void bmx_mbedtls_pk_free(mbedtls_pk_context * context) {
+	mbedtls_pk_free(context);
+	free(context);
+}
+
+int bmx_mbedtls_pk_parse_key(mbedtls_pk_context * context, char * key, int keylen, char * pwd, int pwdlen, int (*f_rng)(void *, unsigned char *, size_t), void *rng) {
+	return mbedtls_pk_parse_key(context, key, keylen, pwd, pwdlen, f_rng, rng);
+}
+
+int bmx_mbedtls_pk_parse_key_string(mbedtls_pk_context * context, BBString * key, BBString * pwd, int (*f_rng)(void *, unsigned char *, size_t), void *rng) {
+	char * k = bbStringToCString(key);
+	char * p = NULL;
+	
+	// mbedtls takes length including the null terminator
+	size_t k_len = strlen(k) + 1;
+	size_t p_len = 0;
+	
+	if (pwd != &bbEmptyString) {
+		p = bbStringToCString(pwd);
+		p_len = strlen(p) + 1;
+	}
+	
+	int res = mbedtls_pk_parse_key(context, k, k_len, p, p_len, f_rng, rng);
+	
+	bbMemFree(p);
+	
+	if (pwd != &bbEmptyString) {
+		bbMemFree(k);
+	}
+	
+	return res;
+}
+
+// --------------------------------------------------------
+
+mbedtls_ctr_drbg_context * bmx_mbedtls_ctr_drbg_init() {
+	mbedtls_ctr_drbg_context * context = (mbedtls_ctr_drbg_context *)malloc(sizeof(mbedtls_ctr_drbg_context));
+	mbedtls_ctr_drbg_init(context);
+	return context;
+}
+
+void bmx_mbedtls_ctr_drbg_free(mbedtls_ctr_drbg_context * context) {
+	mbedtls_ctr_drbg_free(context);
+	free(context);
+}
+
+int bmx_mbedtls_ctr_drbg_seed(mbedtls_ctr_drbg_context * context, int (*f_entropy)(void *, unsigned char *, size_t), void *entropy, const unsigned char *custom, size_t len) {
+	return mbedtls_ctr_drbg_seed(context, f_entropy, entropy, custom, len);
+}
+
+// --------------------------------------------------------
+
+mbedtls_entropy_context * bmx_mbedtls_entropy_init() {
+	mbedtls_entropy_context * context = (mbedtls_entropy_context *)malloc(sizeof(mbedtls_entropy_context));
+	mbedtls_entropy_init(context);
+	return context;
+}
+
+void bmx_mbedtls_entropy_free(mbedtls_entropy_context * context) {
+	mbedtls_entropy_free(context);
+	free(context);
+}

mbedtls.mod/mbedtls.bmx

@@ -0,0 +1,713 @@
+' 
+' Copyright 2018-2021 Bruce A Henderson
+' 
+' Licensed under the Apache License, Version 2.0 (the "License");
+' you may not use this file except in compliance with the License.
+' You may obtain a copy of the License at
+' 
+'     http://www.apache.org/licenses/LICENSE-2.0
+' 
+' Unless required by applicable law or agreed to in writing, software
+' distributed under the License is distributed on an "AS IS" BASIS,
+' WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+' See the License for the specific language governing permissions and
+' limitations under the License.
+' 
+SuperStrict
+
+Rem
+bbdoc: mbed TLS SSL library.
+End Rem
+Module Net.mbedtls
+
+ModuleInfo "Version: 1.05"
+ModuleInfo "License: Apache 2.0"
+ModuleInfo "Copyright: Wrapper - 2018-2021 Bruce A Henderson"
+
+ModuleInfo "History: 1.05"
+ModuleInfo "History: Update to mbedtls 3.0.0.74217ee"
+ModuleInfo "History: 1.04"
+ModuleInfo "History: Update to mbedtls 3.0.0."
+ModuleInfo "History: Fixed NG issues."
+ModuleInfo "History: 1.03"
+ModuleInfo "History: Update to mbedtls 2.13.0."
+ModuleInfo "History: 1.02"
+ModuleInfo "History: Update to mbedtls 2.7.1."
+ModuleInfo "History: Fixed 64-bit build."
+ModuleInfo "History: 1.01"
+ModuleInfo "History: Update to mbedtls 2.7.0."
+ModuleInfo "History: Applied win32 vsnprintf patch."
+ModuleInfo "History: 1.00"
+ModuleInfo "History: Initial Release."
+
+Import BRL.Stream
+Import "common.bmx"
+
+'
+' Patch notes :
+'    For new releases, error.c and version_features.c are generated - can run 'make' to get one.
+'
+'    For older versions of win32, a patch was required for 2.7.0 use of vsnprintf
+'    see : https://github.com/ARMmbed/mbedtls/issues/355
+'
+
+Function MBEDTLSError:String(errornum:Int)
+	Local buf:Byte[1024]
+	mbedtls_strerror(errornum, buf, 1024)
+	Return String.FromUTF8String(buf)
+End Function
+
+Rem
+bbdoc: Wrapper type for sockets.
+about: Currently backed by just a file descriptor, but might be more in the future
+(eg two file descriptors for combined IPv4 + IPv6 support, or additional structures
+for hand-made UDP demultiplexing).
+End Rem
+Type TNetContext
+
+	Field contextPtr:Byte Ptr
+
+	Rem
+	bbdoc: 
+	End Rem
+	Method Create:TNetContext()
+		contextPtr = bmx_mbedtls_net_init()
+		Return Self
+	End Method
+
+	Rem
+	bbdoc: Creates a receiving socket on bindIp:port in the chosen protocol (#MBEDTLS_NET_PROTO_TCP or #MBEDTLS_NET_PROTO_UDP).
+	returns: 0 if successful, or one of: #MBEDTLS_ERR_NET_SOCKET_FAILED, #MBEDTLS_ERR_NET_BIND_FAILED, #MBEDTLS_ERR_NET_LISTEN_FAILED.
+	about: If bindIp is Null, all interfaces are bound
+	Regardless of the protocol, opens the sockets and binds it. In addition, make the socket listening if protocol is TCP.
+	End Rem
+	Method Bind:Int(bindIp:String, port:String, proto:Int)
+		Return bmx_mbedtls_net_bind(contextPtr, bindIp, port, proto)
+	End Method
+
+	Rem
+	bbdoc: Initiates a connection with host:port in the given protocol  (#MBEDTLS_NET_PROTO_TCP or #MBEDTLS_NET_PROTO_UDP)..
+	returns: 0 if successful, or one of: #MBEDTLS_ERR_NET_SOCKET_FAILED, #MBEDTLS_ERR_NET_UNKNOWN_HOST, #MBEDTLS_ERR_NET_CONNECT_FAILED.
+	about: Sets the socket in connected mode even with UDP.
+	End Rem
+	Method Connect:Int(host:String, port:String, proto:Int)
+		Return bmx_mbedtls_net_connect(contextPtr, host, port, proto)
+	End Method
+	
+	Rem
+	bbdoc: Reads at most @length characters.
+	returns: the number of bytes received, or a non-zero error code; with a non-blocking socket, #MBEDTLS_ERR_SSL_WANT_READ indicates read() would block.
+	about: If no error occurs, the actual amount read is returned.
+	End Rem
+	Method Recv:Int(buf:Byte Ptr, Length:Size_T)
+		Return bmx_mbedtls_net_recv(contextPtr, buf, Length)
+	End Method
+	
+	Rem
+	bbdoc: Read at most @length characters, blocking for at most @timeout milliseconds.
+	returns: the number of bytes received, or a non-zero error code: #MBEDTLS_ERR_SSL_TIMEOUT if the operation timed out, #MBEDTLS_ERR_SSL_WANT_READ if interrupted by a signal.
+	about: If no error occurs, the actual amount read is returned.
+	This will block (until data becomes available or timeout is reached) even if the socket is
+	set to non-blocking. Handling timeouts with non-blocking reads requires a different strategy.
+	End Rem
+	Method RecvTimeout:Int(buf:Byte Ptr, Length:Size_T, timeout:UInt)
+		Return bmx_mbedtls_net_recv_timeout(contextPtr, buf, Length, timeout)
+	End Method
+	
+	Rem
+	bbdoc: Writes at most @length characters.
+	returns: the number of bytes sent, or a non-zero error code; with a non-blocking socket, #MBEDTLS_ERR_SSL_WANT_WRITE indicates write() would block.
+	about: If no error occurs, the actual amount read is returned.
+	End Rem
+	Method Send:Int(buf:Byte Ptr, Length:Size_T)
+		Return bmx_mbedtls_net_send(contextPtr, buf, Length)
+	End Method
+	
+	Rem
+	bbdoc: Sets the socket blocking.
+	returns: 0 if successful, or a non-zero error code
+	End Rem
+	Method SetBlock:Int()
+		Return mbedtls_net_set_block(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Sets the socket non-blocking.
+	returns: 0 if successful, or a non-zero error code
+	End Rem
+	Method SetNonBlock:Int()
+		Return mbedtls_net_set_nonblock(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Portable usleep helper.
+	about: Real amount of time slept will not be less than select()'s timeout granularity (typically, 10ms).
+	End Rem
+	Function USleep(usec:UInt)
+		bmx_mbedtls_net_usleep(usec)
+	End Function
+	
+	Rem
+	bbdoc: Check if data is available on the socket.
+	End Rem
+	Method Poll:Int(rw:Int, timeout:Int)
+		Return bmx_mbedtls_net_poll(contextPtr, rw, timeout)
+	End Method
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method Accept:Int(client:TNetContext, ip:String Var)
+		Local buf:Byte[256]
+		Local Length:Size_T
+
+		Local res:Int = mbedtls_net_accept(contextPtr, client.contextPtr, buf, 256, Varptr Length)
+		
+		If Length = 4
+			ip = StrIPv4(buf)
+		ElseIf Length = 16
+			' IPv6 works, I tested
+			' You have to bind to [::1] and you can then `curl -g -6 --insecure "https://[::1]"`
+			ip = "IPv6"
+		Else
+			ip = "UNKNOWN"
+		End If
+		
+		Return res
+	End Method
+	
+	Function StrIPv4:String(buf:Byte Ptr)
+		Return buf[0] + "." + buf[1] + "." + buf[2] + "." + buf[3]
+	End Function
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method Free()
+		bmx_mbedtls_net_free(contextPtr)
+	End Method
+	
+	Method Delete()
+		If contextPtr Then
+			Free()
+			bmx_mbedtls_net_delete(contextPtr)
+			contextPtr = Null
+		End If
+	End Method
+	
+End Type
+
+Rem
+bdoc: 
+End Rem
+Type TSSLContext
+
+	Field contextPtr:Byte Ptr
+	
+	Field _bioCtx:Object
+	Field _cbSend:Int(ctx:Object, buf:Byte Ptr, Length:Size_T)
+	Field _cbRecv:Int(ctx:Object, buf:Byte Ptr, Length:Size_T)
+	Field _cbTimeout:Int(ctx:Object, buf:Byte Ptr, Length:Size_T, timeout:Int)
+	Field _cbTimerSet(ctx:Object, intMs:UInt, finMs:UInt)
+	Field _timerCtx:Object
+	Field _cbTimerGet:Int(ctx:Object)
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method Create:TSSLContext()
+		contextPtr = bmx_mbedtls_ssl_init()
+		Return Self
+	End Method
+
+	Rem
+	bbdoc: 
+	End Rem
+	Method Setup:Int(config:TSSLConfig)
+		Return mbedtls_ssl_setup(contextPtr, config.configPtr)
+	End Method
+	
+	Rem
+	bbdoc: Resets an already initialized SSL context for re-use while retaining application-set variables, function pointers and data.
+	returns: 0 if successful, or #MBEDTLS_ERR_SSL_ALLOC_FAILED, #MBEDTLS_ERR_SSL_HW_ACCEL_FAILED or #MBEDTLS_ERR_SSL_COMPRESSION_FAILED
+	End Rem
+	Method SessionReset:Int()
+		Return mbedtls_ssl_session_reset(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Sets the underlying BIO callbacks for write, read and read-with-timeout.
+	End Rem
+	Method SetBio(ctx:Object, cbSend:Int(ctx:Object, buf:Byte Ptr, Length:Size_T), ..
+			cbRecv:Int(ctx:Object, buf:Byte Ptr, Length:Size_T), ..
+			cbTimeout:Int(ctx:Object, buf:Byte Ptr, Length:Size_T, timeout:Int))
+
+		_bioCtx = ctx
+		_cbSend = cbSend
+		_cbRecv = cbRecv
+		_cbTimeout = cbTimeout
+		
+		Local cbs:Byte Ptr
+		Local cbr:Byte Ptr
+		Local cbt:Byte Ptr
+		
+		If cbSend Then
+			cbs = _sendCallback
+		End If
+		
+		If cbRecv Then
+			cbr = _recvCallback
+		End If
+		
+		If cbTimeout Then
+			cbt = _timeoutCallback
+		End If
+		
+		mbedtls_ssl_set_bio(contextPtr, Self, cbs, cbr, cbt)
+	End Method
+	
+	Rem
+	bbdoc: Sets the timer callbacks (Mandatory for DTLS.)
+	End Rem
+	Method SetTimerCallbacks(ctx:Object, Set(ctx:Object, intMs:UInt, finMs:UInt), get:Int(ctx:Object))
+		_timerCtx = ctx
+		_cbTimerSet = Set
+		_cbTimerGet = get
+		
+		mbedtls_ssl_set_timer_cb(contextPtr, Self, _timerSetCallback, _timerGetCallback)
+	End Method
+
+	Rem
+	bbdoc: Performs the SSL handshake.
+	returns: 0 if successful, or #MBEDTLS_ERR_SSL_WANT_READ or #MBEDTLS_ERR_SSL_WANT_WRITE, or #MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED (see below), or a specific SSL error code.
+	about: If this method returns something other than 0 or #MBEDTLS_ERR_SSL_WANT_READ/WRITE, then
+	the ssl context becomes unusable, and you should either free it or call SessionReset() on it
+	before re-using it for a new connection; the current connection must be closed.
+	
+	If DTLS is in use, then you may choose to handle #MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED specially
+	for logging purposes, as it is an expected return value rather than an actual error, but you still
+	need to reset/free the context.
+	End Rem
+	Method Handshake:Int()
+		Return mbedtls_ssl_handshake(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Performs a single step of the SSL handshake.
+	returns: 0 if successful, or #MBEDTLS_ERR_SSL_WANT_READ or #MBEDTLS_ERR_SSL_WANT_WRITE, or a specific SSL error code.
+	End Rem
+	Method HandshakeStep:Int()
+		Return mbedtls_ssl_handshake_step(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Initiates an SSL renegotiation on the running connection.
+	about: Client: perform the renegotiation right now.
+	Server: request renegotiation, which will be performed during the next call to
+	#Read() if honored by client.
+	End Rem
+	Method Renegotiate:Int()
+		Return mbedtls_ssl_renegotiate(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Reads at most @length application data bytes.
+	returns: the number of bytes read, or 0 for EOF, or #MBEDTLS_ERR_SSL_WANT_READ or #MBEDTLS_ERR_SSL_WANT_WRITE, or #MBEDTLS_ERR_SSL_CLIENT_RECONNECT (see below), or another negative error code.
+	about: If this method returns something other than a positive value or 
+	#MBEDTLS_ERR_SSL_WANT_READ/WRITE or #MBEDTLS_ERR_SSL_CLIENT_RECONNECT, then the ssl
+	context becomes unusable, and you should either free it or call #SessonReset() on it 
+	before re-using it for a new connection; the current connection must be closed.
+	End Rem
+	Method Read:Int(buf:Byte Ptr, Length:Size_T)
+		Return bmx_mbedtls_ssl_read(contextPtr, buf, Length)
+	End Method
+
+	Method Write:Int(buf:Byte Ptr, Length:Size_T)
+		Return bmx_mbedtls_ssl_write(contextPtr, buf, Length)
+	End Method
+	
+	Rem
+	bbdoc: Returns the number of data bytes available to read.
+	returns: How many bytes are available in the read buffer.
+	End Rem
+	Method GetBytesAvail:Int()
+		Return mbedtls_ssl_get_bytes_avail(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Returns the result of the certificate verification.
+	returns: 0 if successful, -1 if result is not available (eg because the handshake was aborted too early), or a combination of BADCERT_xxx and BADCRL_xxx flags, see x509.h
+	End Rem
+	Method GetVerifyResult:Int()
+		Return mbedtls_ssl_get_verify_result(contextPtr)
+	End Method
+	
+	Rem
+	bbdoc: Returns the name of the current ciphersuite.
+	End Rem
+	Method GetCipherSuite:String()
+		Return String.FromUTF8String(mbedtls_ssl_get_ciphersuite(contextPtr))
+	End Method
+	
+	Rem
+	bbdoc: Returns the current SSL version (SSLv3/TLSv1/etc).
+	End Rem
+	Method GetVersion:String()
+		Return String.FromUTF8String(mbedtls_ssl_get_version(contextPtr))
+	End Method
+	
+	Rem
+	bbdoc: Returns the (maximum) number of bytes added by the record layer: header + encryption/MAC overhead (inc. padding)
+	returns: Current maximum record expansion in bytes, or #MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE if compression is enabled, which makes expansion much less predictable
+	End Rem
+	Method GetRecordExpansion:Int()
+		Return mbedtls_ssl_get_record_expansion(contextPtr)
+	End Method
+
+	Rem
+	bbdoc: Notifies the peer that the connection is being closed.
+	returns: 0 if successful, or a specific SSL error code.
+	End Rem
+	Method CloseNotify:Int()
+		Return mbedtls_ssl_close_notify(contextPtr)
+	End Method
+
+	Function _sendCallback:Int(ctx:TSSLContext, buf:Byte Ptr, Length:Size_T)
+		If TNetContext(ctx._bioCtx) Then
+			Return bmx_mbedtls_net_cbsend(ctx._cbSend, TNetContext(ctx._bioCtx).contextPtr, buf, Length)
+		Else
+			Return ctx._cbSend(ctx._bioCtx, buf, Length)
+		End If
+	End Function
+
+	Function _recvCallback:Int(ctx:TSSLContext, buf:Byte Ptr, Length:Size_T)
+		If TNetContext(ctx._bioCtx) Then
+			Return bmx_mbedtls_net_cbrecv(ctx._cbRecv, TNetContext(ctx._bioCtx).contextPtr, buf, Length)
+		Else
+			Return ctx._cbRecv(ctx._bioCtx, buf, Length)
+		End If
+	End Function
+
+	Function _timeoutCallback:Int(ctx:TSSLContext, buf:Byte Ptr, Length:Size_T, timeout:Int)
+		If TNetContext(ctx._bioCtx) Then
+			Return bmx_mbedtls_net_cbtimeout(ctx._cbTimeout, TNetContext(ctx._bioCtx).contextPtr, buf, Length, timeout)
+		Else
+			Return ctx._cbTimeout(ctx._bioCtx, buf, Length, timeout)
+		End If
+	End Function
+
+	Function _timerSetCallback(ctx:TSSLContext, intMs:UInt, finMs:UInt)
+		ctx._cbTimerSet(ctx._timerCtx, intMs, finMs)
+	End Function
+	
+	Function _timerGetCallback:Int(ctx:TSSLContext)
+		Return ctx._cbTimerGet(ctx._timerCtx)
+	End Function
+	
+	Method Delete()
+		If contextPtr Then
+			bmx_mbedtls_ssl_free(contextPtr)
+			contextPtr = Null
+		End If
+	End Method
+
+End Type
+
+Rem
+bbdoc: 
+End Rem
+Type TSSLConfig
+
+	Field configPtr:Byte Ptr
+	
+	Field _cbDbg(ctx:Object, level:Int, file:String, line:Int, str:String)
+	Field _dbgCtx:Object
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method Create:TSSLConfig()
+		configPtr = bmx_mbedtls_ssl_config_init()
+		Return Self
+	End Method
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method Defaults:Int(endpoint:Int = MBEDTLS_SSL_IS_SERVER, transport:Int = MBEDTLS_SSL_TRANSPORT_STREAM, preset:Int = MBEDTLS_SSL_PRESET_DEFAULT)
+		Return mbedtls_ssl_config_defaults(configPtr, endpoint, transport, preset)
+	End Method
+	
+	Rem
+	bbdoc: Sets the current endpoint type.
+	about: One of #MBEDTLS_SSL_IS_CLIENT or #MBEDTLS_SSL_IS_SERVER.
+	End Rem
+	Method SetEndPoint(endpoint:Int)
+		mbedtls_ssl_conf_endpoint(configPtr, endpoint)
+	End Method
+	
+	Rem
+	bbdoc: Set the transport type (TLS or DTLS). Default: TLS
+	about: #MBEDTLS_SSL_TRANSPORT_STREAM for TLS, #MBEDTLS_SSL_TRANSPORT_DATAGRAM for DTLS.
+	For DTLS, you must either provide a recv callback that doesn't block, or one that handles
+	timeouts, see TSSLContext.SetBio(). You also need to provide timer callbacks with 
+	TSSLContext.SetTimerCallbacks().
+	End Rem
+	Method SetTransport(transport:Int)
+		mbedtls_ssl_conf_transport(configPtr, transport)
+	End Method
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method SetAuthMode(authMode:Int)
+	End Method
+	
+	Rem
+	bbdoc:
+	End Rem
+	Method RNG(cbRandom:Int(rng:Object, output:Byte Ptr, length:Size_T), rng:Object)
+		If TRandContext(rng) Then
+			mbedtls_ssl_conf_rng(configPtr, cbRandom, TRandContext(rng).contextPtr)
+		Else
+			bmx_mbedtls_ssl_conf_rng(configPtr, cbRandom, rng)
+		End If
+	End Method
+	
+	Rem
+	bbdoc:
+	End Rem
+	Method DBG(cbDebug(ctx:Object, level:Int, file:String, line:Int, str:String), ctx:Object)
+		_cbDbg = cbDebug
+		_dbgCtx = ctx
+		mbedtls_ssl_conf_dbg(configPtr, _callbackDebug, Self)
+	End Method
+	
+	Rem
+	bbdoc: Set the threshold error level to handle globally all debug output.
+	about: Debug messages that have a level over the threshold value are discarded.
+	(Default value: 0 = No debug )
+	End Rem
+	Function SetDebugThreshold(threshold:Int)
+		mbedtls_debug_set_threshold(threshold)
+	End Function
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method CaChain(chain:TX509Cert, crl:TX509CertRevList = Null)
+		If crl Then
+			mbedtls_ssl_conf_ca_chain(configPtr, chain.certPtr, crl.certPtr)
+		Else
+			mbedtls_ssl_conf_ca_chain(configPtr, chain.certPtr, Null)
+		End If
+	End Method
+	
+	Function _callbackDebug(ctx:Object, level:Int, file:Byte Ptr, line:Int, str:Byte Ptr)
+		Local f:String = String.FromUTF8String(file)
+		Local s:String = String.FromUTF8String(str)
+		Local config:TSSLConfig = TSSLConfig(ctx)
+		config._cbDbg(config._dbgCtx, level, f, line, s)
+	End Function
+
+	Rem
+	bbdoc: 
+	End Rem
+	Method OwnCert:Int(cert:TX509Cert, pkContext:TPkContext)
+		Return mbedtls_ssl_conf_own_cert(configPtr, cert.certPtr, pkContext.contextPtr)
+	End Method
+	
+	Method Delete()
+		If configPtr Then
+			bmx_mbedtls_ssl_config_free(configPtr)
+			configPtr = Null
+		End If
+	End Method
+
+End Type
+
+Type TSSLSession
+
+	Field sessionPtr:Byte Ptr
+	
+End Type
+
+Rem
+bbdoc: Container for an X.509 certificate.
+about: Ther certificate may be chained.
+End Rem
+Type TX509Cert
+
+	Field certPtr:Byte Ptr
+	Field _owned:Int
+	
+	Function _create:TX509Cert(certPtr:Byte Ptr)
+		If certPtr Then
+			Local this:TX509Cert = New TX509Cert
+			this.certPtr = certPtr
+			Return this
+		End If
+	End Function
+
+	Rem
+	bbdoc: 
+	End Rem
+	Method Create:TX509Cert()
+		certPtr = bmx_mbedtls_x509_crt_init()
+		_owned = True
+		Return Self
+	End Method
+	
+	Rem
+	bbdoc: Parses one or more certificates and add them to the chained list.
+	about: Parses permissively. If some certificates can be parsed, the result is the number
+	of failed certificates it encountered. If none complete correctly, the first error is returned.
+	End Rem
+	Method Parse:Int(buf:Byte Ptr, buflen:Int)
+		Return bmx_mbedtls_x509_crt_parse(certPtr, buf, buflen)
+	End Method
+	
+	Rem
+	bbdoc: Parses a file with one or more certificates (usually .pem extension)
+	End Rem
+	Method ParseFile:Int(path:String)
+		Local buf:Byte[] = LoadByteArray(path)
+		
+		' Have to ensure there is a null terminator
+		buf = buf[..buf.length + 1]
+		buf[buf.length - 1] = 0
+		
+		Return Parse(buf, buf.length)
+	End Method
+	
+	Method Delete()
+		If certPtr And _owned Then
+			bmx_mbedtls_x509_crt_free(certPtr)
+			certPtr = Null
+		End If
+	End Method
+
+End Type
+
+Type TX509CertRevList
+
+	Field certPtr:Byte Ptr
+
+End Type
+
+Rem
+bbdoc: 
+End Rem
+Type TPkContext
+
+	Field contextPtr:Byte Ptr
+	Field _cbRandom:Byte Ptr
+	Field _rng:Byte Ptr
+	
+	Method Create:TPkContext()
+		contextPtr = bmx_mbedtls_pk_init()
+		_cbRandom = Null
+		_rng = Null
+		Return Self
+	End Method
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method ParseKey:Int(key:Byte Ptr, keylen:Int, pwd:Byte Ptr = Null, pwdlen:Int = 0)
+		Return bmx_mbedtls_pk_parse_key(contextPtr, key, keylen, pwd, pwdlen, _cbRandom, _rng)
+	End Method
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method ParseKeyString:Int(key:String, pwd:String = "")
+		Return bmx_mbedtls_pk_parse_key_string(contextPtr, key, pwd, _cbRandom, _rng)
+	End Method
+	
+	Rem
+	bbdoc: Load a private key from file (usually .pem extension)
+	End Rem
+	Method ParseKeyFile:Int(path:String, pwd:String = "")
+		Local key:String = LoadString(path)
+		Return ParseKeyString(key, pwd)
+	End Method
+	
+	Rem
+	bbdoc: Supply a seeded RNG; skip this unless you ever manage to somehow run into MBEDTLS_ERR_ECP_BAD_INPUT_DATA
+	End Rem
+	Method RNG(cbRandom:Int(rng:Object, output:Byte Ptr, length:Size_T), rng:Object)
+		If TRandContext(rng) Then
+			_rng = TRandContext(rng).contextPtr
+		Else
+			_rng = rng
+		End If
+		
+		_cbRandom = cbRandom
+	End Method
+	
+	Method Delete()
+		If contextPtr Then
+			bmx_mbedtls_pk_free(contextPtr)
+			contextPtr = Null
+		End If
+	End Method
+	
+End Type
+
+Rem
+bbdoc: 
+End Rem
+Type TSSLCacheContext
+
+	Field contextPtr:Byte Ptr
+	
+	
+	
+	Function Get:Int()
+	End Function
+End Type
+
+Type TEntropyContext
+
+	Field contextPtr:Byte Ptr
+	
+	Method Create:TEntropyContext()
+		contextPtr = bmx_mbedtls_entropy_init()
+		Return Self
+	End Method
+	
+End Type
+
+Rem
+bbdoc: Counter mode Deterministic Random Byte Generator
+End Rem
+Type TRandContext
+
+	Field contextPtr:Byte Ptr
+	
+	Method Create:TRandContext()
+		contextPtr = bmx_mbedtls_ctr_drbg_init()
+		Return Self
+	End Method
+	
+	Rem
+	bbdoc: 
+	End Rem
+	Method Seed:Int(cbEntropy:Int(entropy:Object, buf:Byte Ptr, length:Size_T), entropy:Object, custom:Byte Ptr = Null, length:Size_T = 0)
+		If TEntropyContext(entropy) Then
+			Return mbedtls_ctr_drbg_seed(contextPtr, cbEntropy, TEntropyContext(entropy).contextPtr, custom, length)
+		Else
+			Return bmx_mbedtls_ctr_drbg_seed(contextPtr, cbEntropy, entropy, custom, length)
+		End If
+	End Method
+
+	Method Delete()
+		If contextPtr Then
+			bmx_mbedtls_ctr_drbg_free(contextPtr)
+			contextPtr = Null
+		End If
+	End Method
+
+End Type
+

mbedtls.mod/mbedtls/.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug report
+about: To report a bug, please fill this form.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+### Summary
+
+
+
+### System information
+
+Mbed TLS version (number or commit id): 
+Operating system and version: 
+Configuration (if not default, please attach `mbedtls_config.h`): 
+Compiler and options (if you used a pre-built binary, please indicate how you obtained it): 
+Additional environment information: 
+
+### Expected behavior
+
+
+
+### Actual behavior
+
+
+
+### Steps to reproduce
+
+
+
+### Additional information
+

mbedtls.mod/mbedtls/.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+    - name: Mbed TLS security team
+      url: mailto:[email protected]
+      about: Report a security vulnerability.
+    - name: Mbed TLS mailing list
+      url: https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls
+      about: Mbed TLS community support and general discussion.

mbedtls.mod/mbedtls/.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,17 @@
+---
+name: Enhancement request
+about: To request an enhancement, please fill this form.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+### Suggested enhancement
+
+
+
+### Justification
+
+Mbed TLS needs this because 
+

mbedtls.mod/mbedtls/.github/pull_request_template.md

@@ -0,0 +1,36 @@
+Notes:
+* Pull requests cannot be accepted until the PR follows the [contributing guidelines](../CONTRIBUTING.md). In particular, each commit must have at least one `Signed-off-by:` line from the committer to certify that the contribution is made under the terms of the [Developer Certificate of Origin](../dco.txt).
+* This is just a template, so feel free to use/remove the unnecessary things
+## Description
+A few sentences describing the overall goals of the pull request's commits.
+
+
+## Status
+**READY/IN DEVELOPMENT/HOLD**
+
+## Requires Backporting
+When there is a bug fix, it should be backported to all maintained and supported branches.
+Changes do not have to be backported if:
+- This PR is a new feature\enhancement
+- This PR contains changes in the API. If this is true, and there is a need for the fix to be backported, the fix should be handled differently in the legacy branch
+
+Yes | NO  
+Which branch?
+
+## Migrations
+If there is any API change, what's the incentive and logic for it.
+
+YES | NO
+
+## Additional comments
+Any additional information that could be of interest
+
+## Todos
+- [ ] Tests
+- [ ] Documentation
+- [ ] Changelog updated
+- [ ] Backported
+
+
+## Steps to test or reproduce
+Outline the steps to test or reproduce the PR here.

mbedtls.mod/mbedtls/.gitignore

@@ -0,0 +1,54 @@
+# Random seed file created by test scripts and sample programs
+seedfile
+
+# CMake build artifacts:
+CMakeCache.txt
+CMakeFiles
+CTestTestfile.cmake
+cmake_install.cmake
+Testing
+# CMake generates *.dir/ folders for in-tree builds (used by MSVC projects), ignore all of those:
+*.dir/
+# MSVC files generated by CMake:
+/*.sln
+/*.vcxproj
+/*.filters
+
+# Test coverage build artifacts:
+Coverage
+*.gcno
+*.gcda
+coverage-summary.txt
+
+# generated by scripts/memory.sh
+massif-*
+
+# MSVC build artifacts:
+*.exe
+*.pdb
+*.ilk
+*.lib
+
+# Python build artifacts:
+*.pyc
+
+# CMake generates *.dir/ folders for in-tree builds (used by MSVC projects), ignore all of those:
+*.dir/
+
+# Microsoft CMake extension for Visual Studio Code generates a build directory by default
+/build/
+
+# Generated documentation:
+/apidoc
+
+# PSA Crypto compliance test repo, cloned by test_psa_compliance.py
+/psa-arch-tests
+
+# Editor navigation files:
+/GPATH
+/GRTAGS
+/GSYMS
+/GTAGS
+/TAGS
+/cscope*.out
+/tags

mbedtls.mod/mbedtls/.globalrc

@@ -0,0 +1,3 @@
+default:\
+    :langmap=c\:.c.h.function:\
+

mbedtls.mod/mbedtls/.mypy.ini

@@ -0,0 +1,4 @@
+[mypy]
+mypy_path = scripts
+namespace_packages = True
+warn_unused_configs = True

mbedtls.mod/mbedtls/.pylintrc

@@ -0,0 +1,75 @@
+[MASTER]
+init-hook='import sys; sys.path.append("scripts")'
+
+[BASIC]
+# We're ok with short funtion argument names.
+# [invalid-name]
+argument-rgx=[a-z_][a-z0-9_]*$
+
+# Allow filter and map.
+# [bad-builtin]
+bad-functions=input
+
+# We prefer docstrings, but we don't require them on all functions.
+# Require them only on long functions (for some value of long).
+# [missing-docstring]
+docstring-min-length=10
+
+# No upper limit on method names. Pylint <2.1.0 has an upper limit of 30.
+# [invalid-name]
+method-rgx=[a-z_][a-z0-9_]{2,}$
+
+# Allow module names containing a dash (but no underscore or uppercase letter).
+# They are whole programs, not meant to be included by another module.
+# [invalid-name]
+module-rgx=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+)|[a-z][-0-9a-z]+)$
+
+# Some functions don't need docstrings.
+# [missing-docstring]
+no-docstring-rgx=(run_)?main$
+
+# We're ok with short local or global variable names.
+# [invalid-name]
+variable-rgx=[a-z_][a-z0-9_]*$
+
+[DESIGN]
+# Allow more than the default 7 attributes.
+# [too-many-instance-attributes]
+max-attributes=15
+
+[FORMAT]
+# Allow longer modules than the default recommended maximum.
+# [too-many-lines]
+max-module-lines=2000
+
+[MESSAGES CONTROL]
+# * locally-disabled, locally-enabled: If we disable or enable a message
+#   locally, it's by design. There's no need to clutter the Pylint output
+#   with this information.
+# * logging-format-interpolation: Pylint warns about things like
+#   ``log.info('...'.format(...))``. It insists on ``log.info('...', ...)``.
+#   This is of minor utility (mainly a performance gain when there are
+#   many messages that use formatting and are below the log level).
+#   Some versions of Pylint (including 1.8, which is the version on
+#   Ubuntu 18.04) only recognize old-style format strings using '%',
+#   and complain about something like ``log.info('{}', foo)`` with
+#   logging-too-many-args (Pylint supports new-style formatting if
+#   declared globally with logging_format_style under [LOGGING] but
+#   this requires Pylint >=2.2).
+# * no-else-return: Allow the perfectly reasonable idiom
+#    if condition1:
+#        return value1
+#    else:
+#        return value2
+# * unnecessary-pass: If we take the trouble of adding a line with "pass",
+#   it's because we think the code is clearer that way.
+disable=locally-disabled,locally-enabled,logging-format-interpolation,no-else-return,unnecessary-pass
+
+[REPORTS]
+# Don't diplay statistics. Just the facts.
+reports=no
+
+[VARIABLES]
+# Allow unused variables if their name starts with an underscore.
+# [unused-argument]
+dummy-variables-rgx=_.*

mbedtls.mod/mbedtls/.travis.yml

@@ -0,0 +1,66 @@
+language: c
+compiler: gcc
+sudo: false
+cache: ccache
+
+jobs:
+  include:
+    - name: basic checks and reference configurations
+      addons:
+        apt:
+          packages:
+          - gnutls-bin
+          - doxygen
+          - graphviz
+          - gcc-arm-none-eabi
+          - libnewlib-arm-none-eabi
+          - gcc-arm-linux-gnueabi
+          - libc6-dev-armel-cross
+      language: python # Needed to get pip for Python 3
+      python: 3.5 # version from Ubuntu 16.04
+      install:
+        - pip install mypy==0.780 pylint==2.4.4
+      script:
+        - tests/scripts/all.sh -k 'check_*'
+        - tests/scripts/all.sh -k test_default_out_of_box
+        - tests/scripts/all.sh -k test_ref_configs
+        - tests/scripts/all.sh -k build_arm_linux_gnueabi_gcc_arm5vte build_arm_none_eabi_gcc_m0plus
+
+    - name: full configuration
+      script:
+        - tests/scripts/all.sh -k test_full_cmake_gcc_asan
+
+    - name: Windows
+      os: windows
+      before_install:
+        - choco install python --version=3.5.4
+      env:
+        # Add the directory where the Choco packages go
+        - PATH=/c/Python35:/c/Python35/Scripts:$PATH
+      script:
+        - type perl; perl --version
+        - type python; python --version
+        - scripts/make_generated_files.bat
+        # Logs appear out of sequence on Windows. Give time to catch up.
+        - sleep 5
+        - scripts/windows_msbuild.bat v141 # Visual Studio 2017
+
+after_failure:
+- tests/scripts/travis-log-failure.sh
+
+env:
+  global:
+    - SEED=1
+    - secure: "FrI5d2s+ckckC17T66c8jm2jV6i2DkBPU5nyWzwbedjmEBeocREfQLd/x8yKpPzLDz7ghOvr+/GQvsPPn0dVkGlNzm3Q+hGHc/ujnASuUtGrcuMM+0ALnJ3k4rFr9xEvjJeWb4SmhJO5UCAZYvTItW4k7+bj9L+R6lt3TzQbXzg="
+
+addons:
+  apt:
+    packages:
+    - gnutls-bin
+  coverity_scan:
+    project:
+      name: "ARMmbed/mbedtls"
+    notification_email: [email protected]
+    build_command_prepend:
+    build_command: make
+    branch_pattern: coverity_scan

mbedtls.mod/mbedtls/3rdparty/.gitignore

@@ -0,0 +1 @@
+/Makefile

mbedtls.mod/mbedtls/3rdparty/CMakeLists.txt

@@ -0,0 +1,5 @@
+execute_process(COMMAND ${MBEDTLS_PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/config.py -f ${CMAKE_CURRENT_SOURCE_DIR}/../include/mbedtls/mbedtls_config.h get MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED RESULT_VARIABLE result)
+
+if(${result} EQUAL 0)
+    add_subdirectory(everest)
+endif()

mbedtls.mod/mbedtls/3rdparty/Makefile.inc

@@ -0,0 +1,2 @@
+THIRDPARTY_DIR = $(dir $(lastword $(MAKEFILE_LIST)))
+include $(THIRDPARTY_DIR)/everest/Makefile.inc

mbedtls.mod/mbedtls/3rdparty/everest/.gitignore

@@ -0,0 +1,2 @@
+*.o
+Makefile

mbedtls.mod/mbedtls/3rdparty/everest/CMakeLists.txt

@@ -0,0 +1,27 @@
+add_library(everest
+  library/everest.c
+  library/x25519.c
+  library/Hacl_Curve25519_joined.c)
+
+target_include_directories(everest
+  PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+         $<BUILD_INTERFACE:${MBEDTLS_DIR}/include>
+         $<INSTALL_INTERFACE:include>
+  PRIVATE include/everest
+          include/everest/kremlib
+          ${MBEDTLS_DIR}/library/)
+
+if(INSTALL_MBEDTLS_HEADERS)
+
+  install(DIRECTORY include/everest
+    DESTINATION include
+    FILE_PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+    DIRECTORY_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
+    FILES_MATCHING PATTERN "*.h")
+
+endif(INSTALL_MBEDTLS_HEADERS)
+
+install(TARGETS everest
+  EXPORT MbedTLSTargets
+  DESTINATION ${LIB_INSTALL_DIR}
+  PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)

mbedtls.mod/mbedtls/3rdparty/everest/Makefile.inc

@@ -0,0 +1,6 @@
+THIRDPARTY_INCLUDES+=-I../3rdparty/everest/include -I../3rdparty/everest/include/everest -I../3rdparty/everest/include/everest/kremlib
+
+THIRDPARTY_CRYPTO_OBJECTS+= \
+	../3rdparty/everest/library/everest.o \
+	../3rdparty/everest/library/x25519.o \
+	../3rdparty/everest/library/Hacl_Curve25519_joined.o

mbedtls.mod/mbedtls/3rdparty/everest/README.md

@@ -0,0 +1,5 @@
+The files in this directory stem from [Project Everest](https://project-everest.github.io/) and are distributed under the Apache 2.0 license.
+
+This is a formally verified implementation of Curve25519-based handshakes. The C code is automatically derived from the (verified) [original implementation](https://github.com/project-everest/hacl-star/tree/master/code/curve25519) in the [F* language](https://github.com/fstarlang/fstar) by [KreMLin](https://github.com/fstarlang/kremlin). In addition to the improved safety and security of the implementation, it is also significantly faster than the default implementation of Curve25519 in mbedTLS.
+
+The caveat is that not all platforms are supported, although the version in `everest/library/legacy` should work on most systems. The main issue is that some platforms do not provide a 128-bit integer type and KreMLin therefore has to use additional (also verified) code to simulate them, resulting in less of a performance gain overall. Explictly supported platforms are currently `x86` and `x86_64` using gcc or clang, and Visual C (2010 and later).

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/Hacl_Curve25519.h

@@ -0,0 +1,21 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+/* This file was generated by KreMLin <https://github.com/FStarLang/kremlin>
+ * KreMLin invocation: /mnt/e/everest/verify/kremlin/krml -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -fbuiltin-uint128 -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -I /mnt/e/everest/verify/hacl-star/code/lib/kremlin -I /mnt/e/everest/verify/kremlin/kremlib/compat -I /mnt/e/everest/verify/hacl-star/specs -I /mnt/e/everest/verify/hacl-star/specs/old -I . -ccopt -march=native -verbose -ldopt -flto -tmpdir x25519-c -I ../bignum -bundle Hacl.Curve25519=* -minimal -add-include "kremlib.h" -skip-compilation x25519-c/out.krml -o x25519-c/Hacl_Curve25519.c
+ * F* version: 059db0c8
+ * KreMLin version: 916c37ac
+ */
+
+
+
+#ifndef __Hacl_Curve25519_H
+#define __Hacl_Curve25519_H
+
+
+#include "kremlib.h"
+
+void Hacl_Curve25519_crypto_scalarmult(uint8_t *mypublic, uint8_t *secret, uint8_t *basepoint);
+
+#define __Hacl_Curve25519_H_DEFINED
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/everest.h

@@ -0,0 +1,234 @@
+/*
+ *  Interface to code from Project Everest
+ *
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of Mbed TLS (https://tls.mbed.org).
+ */
+
+#ifndef MBEDTLS_EVEREST_H
+#define MBEDTLS_EVEREST_H
+
+#include "everest/x25519.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Defines the source of the imported EC key.
+ */
+typedef enum
+{
+    MBEDTLS_EVEREST_ECDH_OURS,   /**< Our key. */
+    MBEDTLS_EVEREST_ECDH_THEIRS, /**< The key of the peer. */
+} mbedtls_everest_ecdh_side;
+
+typedef struct {
+    mbedtls_x25519_context ctx;
+} mbedtls_ecdh_context_everest;
+
+
+/**
+ * \brief           This function sets up the ECDH context with the information
+ *                  given.
+ *
+ *                  This function should be called after mbedtls_ecdh_init() but
+ *                  before mbedtls_ecdh_make_params(). There is no need to call
+ *                  this function before mbedtls_ecdh_read_params().
+ *
+ *                  This is the first function used by a TLS server for ECDHE
+ *                  ciphersuites.
+ *
+ * \param ctx       The ECDH context to set up.
+ * \param grp_id    The group id of the group to set up the context for.
+ *
+ * \return          \c 0 on success.
+ */
+int mbedtls_everest_setup( mbedtls_ecdh_context_everest *ctx, int grp_id );
+
+/**
+ * \brief           This function frees a context.
+ *
+ * \param ctx       The context to free.
+ */
+void mbedtls_everest_free( mbedtls_ecdh_context_everest *ctx );
+
+/**
+ * \brief           This function generates a public key and a TLS
+ *                  ServerKeyExchange payload.
+ *
+ *                  This is the second function used by a TLS server for ECDHE
+ *                  ciphersuites. (It is called after mbedtls_ecdh_setup().)
+ *
+ * \note            This function assumes that the ECP group (grp) of the
+ *                  \p ctx context has already been properly set,
+ *                  for example, using mbedtls_ecp_group_load().
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The ECDH context.
+ * \param olen      The number of characters written.
+ * \param buf       The destination buffer.
+ * \param blen      The length of the destination buffer.
+ * \param f_rng     The RNG function.
+ * \param p_rng     The RNG context.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_everest_make_params( mbedtls_ecdh_context_everest *ctx, size_t *olen,
+                                 unsigned char *buf, size_t blen,
+                                 int( *f_rng )( void *, unsigned char *, size_t ),
+                                 void *p_rng );
+
+/**
+ * \brief           This function parses and processes a TLS ServerKeyExhange
+ *                  payload.
+ *
+ *                  This is the first function used by a TLS client for ECDHE
+ *                  ciphersuites.
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The ECDH context.
+ * \param buf       The pointer to the start of the input buffer.
+ * \param end       The address for one Byte past the end of the buffer.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ *
+ */
+int mbedtls_everest_read_params( mbedtls_ecdh_context_everest *ctx,
+                                 const unsigned char **buf, const unsigned char *end );
+
+/**
+ * \brief           This function parses and processes a TLS ServerKeyExhange
+ *                  payload.
+ *
+ *                  This is the first function used by a TLS client for ECDHE
+ *                  ciphersuites.
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The ECDH context.
+ * \param buf       The pointer to the start of the input buffer.
+ * \param end       The address for one Byte past the end of the buffer.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ *
+ */
+int mbedtls_everest_read_params( mbedtls_ecdh_context_everest *ctx,
+                                 const unsigned char **buf, const unsigned char *end );
+
+/**
+ * \brief           This function sets up an ECDH context from an EC key.
+ *
+ *                  It is used by clients and servers in place of the
+ *                  ServerKeyEchange for static ECDH, and imports ECDH
+ *                  parameters from the EC key information of a certificate.
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The ECDH context to set up.
+ * \param key       The EC key to use.
+ * \param side      Defines the source of the key: 1: Our key, or
+ *                  0: The key of the peer.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ *
+ */
+int mbedtls_everest_get_params( mbedtls_ecdh_context_everest *ctx, const mbedtls_ecp_keypair *key,
+                                mbedtls_everest_ecdh_side side );
+
+/**
+ * \brief           This function generates a public key and a TLS
+ *                  ClientKeyExchange payload.
+ *
+ *                  This is the second function used by a TLS client for ECDH(E)
+ *                  ciphersuites.
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The ECDH context.
+ * \param olen      The number of Bytes written.
+ * \param buf       The destination buffer.
+ * \param blen      The size of the destination buffer.
+ * \param f_rng     The RNG function.
+ * \param p_rng     The RNG context.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_everest_make_public( mbedtls_ecdh_context_everest *ctx, size_t *olen,
+                                 unsigned char *buf, size_t blen,
+                                 int( *f_rng )( void *, unsigned char *, size_t ),
+                                 void *p_rng );
+
+/**
+ * \brief       This function parses and processes a TLS ClientKeyExchange
+ *              payload.
+ *
+ *              This is the third function used by a TLS server for ECDH(E)
+ *              ciphersuites. (It is called after mbedtls_ecdh_setup() and
+ *              mbedtls_ecdh_make_params().)
+ *
+ * \see         ecp.h
+ *
+ * \param ctx   The ECDH context.
+ * \param buf   The start of the input buffer.
+ * \param blen  The length of the input buffer.
+ *
+ * \return      \c 0 on success.
+ * \return      An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_everest_read_public( mbedtls_ecdh_context_everest *ctx,
+                                 const unsigned char *buf, size_t blen );
+
+/**
+ * \brief           This function derives and exports the shared secret.
+ *
+ *                  This is the last function used by both TLS client
+ *                  and servers.
+ *
+ * \note            If \p f_rng is not NULL, it is used to implement
+ *                  countermeasures against side-channel attacks.
+ *                  For more information, see mbedtls_ecp_mul().
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The ECDH context.
+ * \param olen      The number of Bytes written.
+ * \param buf       The destination buffer.
+ * \param blen      The length of the destination buffer.
+ * \param f_rng     The RNG function.
+ * \param p_rng     The RNG context.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_everest_calc_secret( mbedtls_ecdh_context_everest *ctx, size_t *olen,
+                                 unsigned char *buf, size_t blen,
+                                 int( *f_rng )( void *, unsigned char *, size_t ),
+                                 void *p_rng );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_EVEREST_H */

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlib.h

@@ -0,0 +1,29 @@
+/*
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of Mbed TLS (https://tls.mbed.org) and
+ *  originated from Project Everest (https://project-everest.github.io/)
+ */
+
+#ifndef __KREMLIB_H
+#define __KREMLIB_H
+
+#include "kremlin/internal/target.h"
+#include "kremlin/internal/types.h"
+#include "kremlin/c_endianness.h"
+
+#endif     /* __KREMLIB_H */

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/c_endianness.h

@@ -0,0 +1,204 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+#ifndef __KREMLIN_ENDIAN_H
+#define __KREMLIN_ENDIAN_H
+
+#include <string.h>
+#include <inttypes.h>
+
+/******************************************************************************/
+/* Implementing C.fst (part 2: endian-ness macros)                            */
+/******************************************************************************/
+
+/* ... for Linux */
+#if defined(__linux__) || defined(__CYGWIN__)
+#  include <endian.h>
+
+/* ... for OSX */
+#elif defined(__APPLE__)
+#  include <libkern/OSByteOrder.h>
+#  define htole64(x) OSSwapHostToLittleInt64(x)
+#  define le64toh(x) OSSwapLittleToHostInt64(x)
+#  define htobe64(x) OSSwapHostToBigInt64(x)
+#  define be64toh(x) OSSwapBigToHostInt64(x)
+
+#  define htole16(x) OSSwapHostToLittleInt16(x)
+#  define le16toh(x) OSSwapLittleToHostInt16(x)
+#  define htobe16(x) OSSwapHostToBigInt16(x)
+#  define be16toh(x) OSSwapBigToHostInt16(x)
+
+#  define htole32(x) OSSwapHostToLittleInt32(x)
+#  define le32toh(x) OSSwapLittleToHostInt32(x)
+#  define htobe32(x) OSSwapHostToBigInt32(x)
+#  define be32toh(x) OSSwapBigToHostInt32(x)
+
+/* ... for Solaris */
+#elif defined(__sun__)
+#  include <sys/byteorder.h>
+#  define htole64(x) LE_64(x)
+#  define le64toh(x) LE_64(x)
+#  define htobe64(x) BE_64(x)
+#  define be64toh(x) BE_64(x)
+
+#  define htole16(x) LE_16(x)
+#  define le16toh(x) LE_16(x)
+#  define htobe16(x) BE_16(x)
+#  define be16toh(x) BE_16(x)
+
+#  define htole32(x) LE_32(x)
+#  define le32toh(x) LE_32(x)
+#  define htobe32(x) BE_32(x)
+#  define be32toh(x) BE_32(x)
+
+/* ... for the BSDs */
+#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
+#  include <sys/endian.h>
+#elif defined(__OpenBSD__)
+#  include <endian.h>
+
+/* ... for Windows (MSVC)... not targeting XBOX 360! */
+#elif defined(_MSC_VER)
+
+#  include <stdlib.h>
+#  define htobe16(x) _byteswap_ushort(x)
+#  define htole16(x) (x)
+#  define be16toh(x) _byteswap_ushort(x)
+#  define le16toh(x) (x)
+
+#  define htobe32(x) _byteswap_ulong(x)
+#  define htole32(x) (x)
+#  define be32toh(x) _byteswap_ulong(x)
+#  define le32toh(x) (x)
+
+#  define htobe64(x) _byteswap_uint64(x)
+#  define htole64(x) (x)
+#  define be64toh(x) _byteswap_uint64(x)
+#  define le64toh(x) (x)
+
+/* ... for Windows (GCC-like, e.g. mingw or clang) */
+#elif (defined(_WIN32) || defined(_WIN64)) &&                                  \
+    (defined(__GNUC__) || defined(__clang__))
+
+#  define htobe16(x) __builtin_bswap16(x)
+#  define htole16(x) (x)
+#  define be16toh(x) __builtin_bswap16(x)
+#  define le16toh(x) (x)
+
+#  define htobe32(x) __builtin_bswap32(x)
+#  define htole32(x) (x)
+#  define be32toh(x) __builtin_bswap32(x)
+#  define le32toh(x) (x)
+
+#  define htobe64(x) __builtin_bswap64(x)
+#  define htole64(x) (x)
+#  define be64toh(x) __builtin_bswap64(x)
+#  define le64toh(x) (x)
+
+/* ... generic big-endian fallback code */
+#elif defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+
+/* byte swapping code inspired by:
+ * https://github.com/rweather/arduinolibs/blob/master/libraries/Crypto/utility/EndianUtil.h
+ * */
+
+#  define htobe32(x) (x)
+#  define be32toh(x) (x)
+#  define htole32(x)                                                           \
+    (__extension__({                                                           \
+      uint32_t _temp = (x);                                                    \
+      ((_temp >> 24) & 0x000000FF) | ((_temp >> 8) & 0x0000FF00) |             \
+          ((_temp << 8) & 0x00FF0000) | ((_temp << 24) & 0xFF000000);          \
+    }))
+#  define le32toh(x) (htole32((x)))
+
+#  define htobe64(x) (x)
+#  define be64toh(x) (x)
+#  define htole64(x)                                                           \
+    (__extension__({                                                           \
+      uint64_t __temp = (x);                                                   \
+      uint32_t __low = htobe32((uint32_t)__temp);                              \
+      uint32_t __high = htobe32((uint32_t)(__temp >> 32));                     \
+      (((uint64_t)__low) << 32) | __high;                                      \
+    }))
+#  define le64toh(x) (htole64((x)))
+
+/* ... generic little-endian fallback code */
+#elif defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+
+#  define htole32(x) (x)
+#  define le32toh(x) (x)
+#  define htobe32(x)                                                           \
+    (__extension__({                                                           \
+      uint32_t _temp = (x);                                                    \
+      ((_temp >> 24) & 0x000000FF) | ((_temp >> 8) & 0x0000FF00) |             \
+          ((_temp << 8) & 0x00FF0000) | ((_temp << 24) & 0xFF000000);          \
+    }))
+#  define be32toh(x) (htobe32((x)))
+
+#  define htole64(x) (x)
+#  define le64toh(x) (x)
+#  define htobe64(x)                                                           \
+    (__extension__({                                                           \
+      uint64_t __temp = (x);                                                   \
+      uint32_t __low = htobe32((uint32_t)__temp);                              \
+      uint32_t __high = htobe32((uint32_t)(__temp >> 32));                     \
+      (((uint64_t)__low) << 32) | __high;                                      \
+    }))
+#  define be64toh(x) (htobe64((x)))
+
+/* ... couldn't determine endian-ness of the target platform */
+#else
+#  error "Please define __BYTE_ORDER__!"
+
+#endif /* defined(__linux__) || ... */
+
+/* Loads and stores. These avoid undefined behavior due to unaligned memory
+ * accesses, via memcpy. */
+
+inline static uint16_t load16(uint8_t *b) {
+  uint16_t x;
+  memcpy(&x, b, 2);
+  return x;
+}
+
+inline static uint32_t load32(uint8_t *b) {
+  uint32_t x;
+  memcpy(&x, b, 4);
+  return x;
+}
+
+inline static uint64_t load64(uint8_t *b) {
+  uint64_t x;
+  memcpy(&x, b, 8);
+  return x;
+}
+
+inline static void store16(uint8_t *b, uint16_t i) {
+  memcpy(b, &i, 2);
+}
+
+inline static void store32(uint8_t *b, uint32_t i) {
+  memcpy(b, &i, 4);
+}
+
+inline static void store64(uint8_t *b, uint64_t i) {
+  memcpy(b, &i, 8);
+}
+
+#define load16_le(b) (le16toh(load16(b)))
+#define store16_le(b, i) (store16(b, htole16(i)))
+#define load16_be(b) (be16toh(load16(b)))
+#define store16_be(b, i) (store16(b, htobe16(i)))
+
+#define load32_le(b) (le32toh(load32(b)))
+#define store32_le(b, i) (store32(b, htole32(i)))
+#define load32_be(b) (be32toh(load32(b)))
+#define store32_be(b, i) (store32(b, htobe32(i)))
+
+#define load64_le(b) (le64toh(load64(b)))
+#define store64_le(b, i) (store64(b, htole64(i)))
+#define load64_be(b) (be64toh(load64(b)))
+#define store64_be(b, i) (store64(b, htobe64(i)))
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/internal/builtin.h

@@ -0,0 +1,16 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+#ifndef __KREMLIN_BUILTIN_H
+#define __KREMLIN_BUILTIN_H
+
+/* For alloca, when using KreMLin's -falloca */
+#if (defined(_WIN32) || defined(_WIN64))
+#  include <malloc.h>
+#endif
+
+/* If some globals need to be initialized before the main, then kremlin will
+ * generate and try to link last a function with this type: */
+void kremlinit_globals(void);
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/internal/callconv.h

@@ -0,0 +1,46 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+#ifndef __KREMLIN_CALLCONV_H
+#define __KREMLIN_CALLCONV_H
+
+/******************************************************************************/
+/* Some macros to ease compatibility                                          */
+/******************************************************************************/
+
+/* We want to generate __cdecl safely without worrying about it being undefined.
+ * When using MSVC, these are always defined. When using MinGW, these are
+ * defined too. They have no meaning for other platforms, so we define them to
+ * be empty macros in other situations. */
+#ifndef _MSC_VER
+#ifndef __cdecl
+#define __cdecl
+#endif
+#ifndef __stdcall
+#define __stdcall
+#endif
+#ifndef __fastcall
+#define __fastcall
+#endif
+#endif
+
+/* Since KreMLin emits the inline keyword unconditionally, we follow the
+ * guidelines at https://gcc.gnu.org/onlinedocs/gcc/Inline.html and make this
+ * __inline__ to ensure the code compiles with -std=c90 and earlier. */
+#ifdef __GNUC__
+#  define inline __inline__
+#endif
+
+/* GCC-specific attribute syntax; everyone else gets the standard C inline
+ * attribute. */
+#ifdef __GNU_C__
+#  ifndef __clang__
+#    define force_inline inline __attribute__((always_inline))
+#  else
+#    define force_inline inline
+#  endif
+#else
+#  define force_inline inline
+#endif
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/internal/compat.h

@@ -0,0 +1,34 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+#ifndef KRML_COMPAT_H
+#define KRML_COMPAT_H
+
+#include <inttypes.h>
+
+/* A series of macros that define C implementations of types that are not Low*,
+ * to facilitate porting programs to Low*. */
+
+typedef const char *Prims_string;
+
+typedef struct {
+  uint32_t length;
+  const char *data;
+} FStar_Bytes_bytes;
+
+typedef int32_t Prims_pos, Prims_nat, Prims_nonzero, Prims_int,
+    krml_checked_int_t;
+
+#define RETURN_OR(x)                                                           \
+  do {                                                                         \
+    int64_t __ret = x;                                                         \
+    if (__ret < INT32_MIN || INT32_MAX < __ret) {                              \
+      KRML_HOST_PRINTF(                                                        \
+          "Prims.{int,nat,pos} integer overflow at %s:%d\n", __FILE__,         \
+          __LINE__);                                                           \
+      KRML_HOST_EXIT(252);                                                     \
+    }                                                                          \
+    return (int32_t)__ret;                                                     \
+  } while (0)
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/internal/debug.h

@@ -0,0 +1,57 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+#ifndef __KREMLIN_DEBUG_H
+#define __KREMLIN_DEBUG_H
+
+#include <inttypes.h>
+
+#include "kremlin/internal/target.h"
+
+/******************************************************************************/
+/* Debugging helpers - intended only for KreMLin developers                   */
+/******************************************************************************/
+
+/* In support of "-wasm -d force-c": we might need this function to be
+ * forward-declared, because the dependency on WasmSupport appears very late,
+ * after SimplifyWasm, and sadly, after the topological order has been done. */
+void WasmSupport_check_buffer_size(uint32_t s);
+
+/* A series of GCC atrocities to trace function calls (kremlin's [-d c-calls]
+ * option). Useful when trying to debug, say, Wasm, to compare traces. */
+/* clang-format off */
+#ifdef __GNUC__
+#define KRML_FORMAT(X) _Generic((X),                                           \
+  uint8_t : "0x%08" PRIx8,                                                     \
+  uint16_t: "0x%08" PRIx16,                                                    \
+  uint32_t: "0x%08" PRIx32,                                                    \
+  uint64_t: "0x%08" PRIx64,                                                    \
+  int8_t  : "0x%08" PRIx8,                                                     \
+  int16_t : "0x%08" PRIx16,                                                    \
+  int32_t : "0x%08" PRIx32,                                                    \
+  int64_t : "0x%08" PRIx64,                                                    \
+  default : "%s")
+
+#define KRML_FORMAT_ARG(X) _Generic((X),                                       \
+  uint8_t : X,                                                                 \
+  uint16_t: X,                                                                 \
+  uint32_t: X,                                                                 \
+  uint64_t: X,                                                                 \
+  int8_t  : X,                                                                 \
+  int16_t : X,                                                                 \
+  int32_t : X,                                                                 \
+  int64_t : X,                                                                 \
+  default : "unknown")
+/* clang-format on */
+
+#  define KRML_DEBUG_RETURN(X)                                                 \
+    ({                                                                         \
+      __auto_type _ret = (X);                                                  \
+      KRML_HOST_PRINTF("returning: ");                                         \
+      KRML_HOST_PRINTF(KRML_FORMAT(_ret), KRML_FORMAT_ARG(_ret));              \
+      KRML_HOST_PRINTF(" \n");                                                 \
+      _ret;                                                                    \
+    })
+#endif
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/internal/target.h

@@ -0,0 +1,102 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+#ifndef __KREMLIN_TARGET_H
+#define __KREMLIN_TARGET_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <inttypes.h>
+#include <limits.h>
+
+#include "kremlin/internal/callconv.h"
+
+/******************************************************************************/
+/* Macros that KreMLin will generate.                                         */
+/******************************************************************************/
+
+/* For "bare" targets that do not have a C stdlib, the user might want to use
+ * [-add-early-include '"mydefinitions.h"'] and override these. */
+#ifndef KRML_HOST_PRINTF
+#  define KRML_HOST_PRINTF printf
+#endif
+
+#if (                                                                          \
+    (defined __STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) &&             \
+    (!(defined KRML_HOST_EPRINTF)))
+#  define KRML_HOST_EPRINTF(...) fprintf(stderr, __VA_ARGS__)
+#endif
+
+#ifndef KRML_HOST_EXIT
+#  define KRML_HOST_EXIT exit
+#endif
+
+#ifndef KRML_HOST_MALLOC
+#  define KRML_HOST_MALLOC malloc
+#endif
+
+#ifndef KRML_HOST_CALLOC
+#  define KRML_HOST_CALLOC calloc
+#endif
+
+#ifndef KRML_HOST_FREE
+#  define KRML_HOST_FREE free
+#endif
+
+#ifndef KRML_HOST_TIME
+
+#  include <time.h>
+
+/* Prims_nat not yet in scope */
+inline static int32_t krml_time() {
+  return (int32_t)time(NULL);
+}
+
+#  define KRML_HOST_TIME krml_time
+#endif
+
+/* In statement position, exiting is easy. */
+#define KRML_EXIT                                                              \
+  do {                                                                         \
+    KRML_HOST_PRINTF("Unimplemented function at %s:%d\n", __FILE__, __LINE__); \
+    KRML_HOST_EXIT(254);                                                       \
+  } while (0)
+
+/* In expression position, use the comma-operator and a malloc to return an
+ * expression of the right size. KreMLin passes t as the parameter to the macro.
+ */
+#define KRML_EABORT(t, msg)                                                    \
+  (KRML_HOST_PRINTF("KreMLin abort at %s:%d\n%s\n", __FILE__, __LINE__, msg),  \
+   KRML_HOST_EXIT(255), *((t *)KRML_HOST_MALLOC(sizeof(t))))
+
+/* In FStar.Buffer.fst, the size of arrays is uint32_t, but it's a number of
+ * *elements*. Do an ugly, run-time check (some of which KreMLin can eliminate).
+ */
+
+#ifdef __GNUC__
+#  define _KRML_CHECK_SIZE_PRAGMA                                              \
+    _Pragma("GCC diagnostic ignored \"-Wtype-limits\"")
+#else
+#  define _KRML_CHECK_SIZE_PRAGMA
+#endif
+
+#define KRML_CHECK_SIZE(size_elt, sz)                                          \
+  do {                                                                         \
+    _KRML_CHECK_SIZE_PRAGMA                                                    \
+    if (((size_t)(sz)) > ((size_t)(SIZE_MAX / (size_elt)))) {                  \
+      KRML_HOST_PRINTF(                                                        \
+          "Maximum allocatable size exceeded, aborting before overflow at "    \
+          "%s:%d\n",                                                           \
+          __FILE__, __LINE__);                                                 \
+      KRML_HOST_EXIT(253);                                                     \
+    }                                                                          \
+  } while (0)
+
+#if defined(_MSC_VER) && _MSC_VER < 1900
+#  define KRML_HOST_SNPRINTF(buf, sz, fmt, arg) _snprintf_s(buf, sz, _TRUNCATE, fmt, arg)
+#else
+#  define KRML_HOST_SNPRINTF(buf, sz, fmt, arg) snprintf(buf, sz, fmt, arg)
+#endif
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/internal/types.h

@@ -0,0 +1,61 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+#ifndef KRML_TYPES_H
+#define KRML_TYPES_H
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/* Types which are either abstract, meaning that have to be implemented in C, or
+ * which are models, meaning that they are swapped out at compile-time for
+ * hand-written C types (in which case they're marked as noextract). */
+
+typedef uint64_t FStar_UInt64_t, FStar_UInt64_t_;
+typedef int64_t FStar_Int64_t, FStar_Int64_t_;
+typedef uint32_t FStar_UInt32_t, FStar_UInt32_t_;
+typedef int32_t FStar_Int32_t, FStar_Int32_t_;
+typedef uint16_t FStar_UInt16_t, FStar_UInt16_t_;
+typedef int16_t FStar_Int16_t, FStar_Int16_t_;
+typedef uint8_t FStar_UInt8_t, FStar_UInt8_t_;
+typedef int8_t FStar_Int8_t, FStar_Int8_t_;
+
+/* Only useful when building Kremlib, because it's in the dependency graph of
+ * FStar.Int.Cast. */
+typedef uint64_t FStar_UInt63_t, FStar_UInt63_t_;
+typedef int64_t FStar_Int63_t, FStar_Int63_t_;
+
+typedef double FStar_Float_float;
+typedef uint32_t FStar_Char_char;
+typedef FILE *FStar_IO_fd_read, *FStar_IO_fd_write;
+
+typedef void *FStar_Dyn_dyn;
+
+typedef const char *C_String_t, *C_String_t_;
+
+typedef int exit_code;
+typedef FILE *channel;
+
+typedef unsigned long long TestLib_cycles;
+
+typedef uint64_t FStar_Date_dateTime, FStar_Date_timeSpan;
+
+/* The uint128 type is a special case since we offer several implementations of
+ * it, depending on the compiler and whether the user wants the verified
+ * implementation or not. */
+#if !defined(KRML_VERIFIED_UINT128) && defined(_MSC_VER) && defined(_M_X64)
+#  include <emmintrin.h>
+typedef __m128i FStar_UInt128_uint128;
+#elif !defined(KRML_VERIFIED_UINT128) && !defined(_MSC_VER)
+typedef unsigned __int128 FStar_UInt128_uint128;
+#else
+typedef struct FStar_UInt128_uint128_s {
+  uint64_t low;
+  uint64_t high;
+} FStar_UInt128_uint128;
+#endif
+
+typedef FStar_UInt128_uint128 FStar_UInt128_t, FStar_UInt128_t_, uint128_t;
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/kremlin/internal/wasmsupport.h

@@ -0,0 +1,5 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+/* This file is automatically included when compiling with -wasm -d force-c */
+#define WasmSupport_check_buffer_size(X)

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/vs2010/Hacl_Curve25519.h

@@ -0,0 +1,21 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+/* This file was generated by KreMLin <https://github.com/FStarLang/kremlin>
+ * KreMLin invocation: /mnt/e/everest/verify/kremlin/krml -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -I /mnt/e/everest/verify/hacl-star/code/lib/kremlin -I /mnt/e/everest/verify/kremlin/kremlib/compat -I /mnt/e/everest/verify/hacl-star/specs -I /mnt/e/everest/verify/hacl-star/specs/old -I . -ccopt -march=native -verbose -ldopt -flto -tmpdir x25519-c -I ../bignum -bundle Hacl.Curve25519=* -minimal -add-include "kremlib.h" -skip-compilation x25519-c/out.krml -o x25519-c/Hacl_Curve25519.c
+ * F* version: 059db0c8
+ * KreMLin version: 916c37ac
+ */
+
+
+
+#ifndef __Hacl_Curve25519_H
+#define __Hacl_Curve25519_H
+
+
+#include "kremlib.h"
+
+void Hacl_Curve25519_crypto_scalarmult(uint8_t *mypublic, uint8_t *secret, uint8_t *basepoint);
+
+#define __Hacl_Curve25519_H_DEFINED
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/vs2010/inttypes.h

@@ -0,0 +1,36 @@
+/*
+ *  Custom inttypes.h for VS2010 KreMLin requires these definitions,
+ *  but VS2010 doesn't provide them.
+ *
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#ifndef _INTTYPES_H_VS2010
+#define _INTTYPES_H_VS2010
+
+#include <stdint.h>
+
+#ifdef _MSC_VER
+#define inline __inline
+#endif
+
+/* VS2010 unsigned long == 8 bytes */
+
+#define PRIu64 "I64u"
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/vs2010/stdbool.h

@@ -0,0 +1,31 @@
+/*
+ *  Custom stdbool.h for VS2010 KreMLin requires these definitions,
+ *  but VS2010 doesn't provide them.
+ *
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#ifndef _STDBOOL_H_VS2010
+#define _STDBOOL_H_VS2010
+
+typedef int bool;
+
+static bool true = 1;
+static bool false = 0;
+
+#endif

mbedtls.mod/mbedtls/3rdparty/everest/include/everest/x25519.h

@@ -0,0 +1,190 @@
+/*
+ *  ECDH with curve-optimized implementation multiplexing
+ *
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#ifndef MBEDTLS_X25519_H
+#define MBEDTLS_X25519_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MBEDTLS_ECP_TLS_CURVE25519 0x1d
+#define MBEDTLS_X25519_KEY_SIZE_BYTES 32
+
+/**
+ * Defines the source of the imported EC key.
+ */
+typedef enum
+{
+    MBEDTLS_X25519_ECDH_OURS,   /**< Our key. */
+    MBEDTLS_X25519_ECDH_THEIRS, /**< The key of the peer. */
+} mbedtls_x25519_ecdh_side;
+
+/**
+ * \brief           The x25519 context structure.
+ */
+typedef struct
+{
+  unsigned char our_secret[MBEDTLS_X25519_KEY_SIZE_BYTES];
+  unsigned char peer_point[MBEDTLS_X25519_KEY_SIZE_BYTES];
+} mbedtls_x25519_context;
+
+/**
+ * \brief           This function initializes an x25519 context.
+ *
+ * \param ctx       The x25519 context to initialize.
+ */
+void mbedtls_x25519_init( mbedtls_x25519_context *ctx );
+
+/**
+ * \brief           This function frees a context.
+ *
+ * \param ctx       The context to free.
+ */
+void mbedtls_x25519_free( mbedtls_x25519_context *ctx );
+
+/**
+ * \brief           This function generates a public key and a TLS
+ *                  ServerKeyExchange payload.
+ *
+ *                  This is the first function used by a TLS server for x25519.
+ *
+ *
+ * \param ctx       The x25519 context.
+ * \param olen      The number of characters written.
+ * \param buf       The destination buffer.
+ * \param blen      The length of the destination buffer.
+ * \param f_rng     The RNG function.
+ * \param p_rng     The RNG context.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_x25519_make_params( mbedtls_x25519_context *ctx, size_t *olen,
+                        unsigned char *buf, size_t blen,
+                        int( *f_rng )(void *, unsigned char *, size_t),
+                        void *p_rng );
+
+/**
+ * \brief           This function parses and processes a TLS ServerKeyExchange
+ *                  payload.
+ *
+ *
+ * \param ctx       The x25519 context.
+ * \param buf       The pointer to the start of the input buffer.
+ * \param end       The address for one Byte past the end of the buffer.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ *
+ */
+int mbedtls_x25519_read_params( mbedtls_x25519_context *ctx,
+                        const unsigned char **buf, const unsigned char *end );
+
+/**
+ * \brief           This function sets up an x25519 context from an EC key.
+ *
+ *                  It is used by clients and servers in place of the
+ *                  ServerKeyEchange for static ECDH, and imports ECDH
+ *                  parameters from the EC key information of a certificate.
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The x25519 context to set up.
+ * \param key       The EC key to use.
+ * \param side      Defines the source of the key: 1: Our key, or
+ *                  0: The key of the peer.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ *
+ */
+int mbedtls_x25519_get_params( mbedtls_x25519_context *ctx, const mbedtls_ecp_keypair *key,
+                               mbedtls_x25519_ecdh_side side );
+
+/**
+ * \brief           This function derives and exports the shared secret.
+ *
+ *                  This is the last function used by both TLS client
+ *                  and servers.
+ *
+ *
+ * \param ctx       The x25519 context.
+ * \param olen      The number of Bytes written.
+ * \param buf       The destination buffer.
+ * \param blen      The length of the destination buffer.
+ * \param f_rng     The RNG function.
+ * \param p_rng     The RNG context.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_x25519_calc_secret( mbedtls_x25519_context *ctx, size_t *olen,
+                        unsigned char *buf, size_t blen,
+                        int( *f_rng )(void *, unsigned char *, size_t),
+                        void *p_rng );
+
+/**
+ * \brief           This function generates a public key and a TLS
+ *                  ClientKeyExchange payload.
+ *
+ *                  This is the second function used by a TLS client for x25519.
+ *
+ * \see             ecp.h
+ *
+ * \param ctx       The x25519 context.
+ * \param olen      The number of Bytes written.
+ * \param buf       The destination buffer.
+ * \param blen      The size of the destination buffer.
+ * \param f_rng     The RNG function.
+ * \param p_rng     The RNG context.
+ *
+ * \return          \c 0 on success.
+ * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_x25519_make_public( mbedtls_x25519_context *ctx, size_t *olen,
+                        unsigned char *buf, size_t blen,
+                        int( *f_rng )(void *, unsigned char *, size_t),
+                        void *p_rng );
+
+/**
+ * \brief       This function parses and processes a TLS ClientKeyExchange
+ *              payload.
+ *
+ *              This is the second function used by a TLS server for x25519.
+ *
+ * \see         ecp.h
+ *
+ * \param ctx   The x25519 context.
+ * \param buf   The start of the input buffer.
+ * \param blen  The length of the input buffer.
+ *
+ * \return      \c 0 on success.
+ * \return      An \c MBEDTLS_ERR_ECP_XXX error code on failure.
+ */
+int mbedtls_x25519_read_public( mbedtls_x25519_context *ctx,
+                        const unsigned char *buf, size_t blen );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* x25519.h */

mbedtls.mod/mbedtls/3rdparty/everest/library/Hacl_Curve25519.c

@@ -0,0 +1,760 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+/* This file was generated by KreMLin <https://github.com/FStarLang/kremlin>
+ * KreMLin invocation: /mnt/e/everest/verify/kremlin/krml -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -fbuiltin-uint128 -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -I /mnt/e/everest/verify/hacl-star/code/lib/kremlin -I /mnt/e/everest/verify/kremlin/kremlib/compat -I /mnt/e/everest/verify/hacl-star/specs -I /mnt/e/everest/verify/hacl-star/specs/old -I . -ccopt -march=native -verbose -ldopt -flto -tmpdir x25519-c -I ../bignum -bundle Hacl.Curve25519=* -minimal -add-include "kremlib.h" -skip-compilation x25519-c/out.krml -o x25519-c/Hacl_Curve25519.c
+ * F* version: 059db0c8
+ * KreMLin version: 916c37ac
+ */
+
+
+#include "Hacl_Curve25519.h"
+
+extern uint64_t FStar_UInt64_eq_mask(uint64_t x0, uint64_t x1);
+
+extern uint64_t FStar_UInt64_gte_mask(uint64_t x0, uint64_t x1);
+
+extern uint128_t FStar_UInt128_add(uint128_t x0, uint128_t x1);
+
+extern uint128_t FStar_UInt128_add_mod(uint128_t x0, uint128_t x1);
+
+extern uint128_t FStar_UInt128_logand(uint128_t x0, uint128_t x1);
+
+extern uint128_t FStar_UInt128_shift_right(uint128_t x0, uint32_t x1);
+
+extern uint128_t FStar_UInt128_uint64_to_uint128(uint64_t x0);
+
+extern uint64_t FStar_UInt128_uint128_to_uint64(uint128_t x0);
+
+extern uint128_t FStar_UInt128_mul_wide(uint64_t x0, uint64_t x1);
+
+static void Hacl_Bignum_Modulo_carry_top(uint64_t *b)
+{
+  uint64_t b4 = b[4U];
+  uint64_t b0 = b[0U];
+  uint64_t b4_ = b4 & (uint64_t)0x7ffffffffffffU;
+  uint64_t b0_ = b0 + (uint64_t)19U * (b4 >> (uint32_t)51U);
+  b[4U] = b4_;
+  b[0U] = b0_;
+}
+
+inline static void Hacl_Bignum_Fproduct_copy_from_wide_(uint64_t *output, uint128_t *input)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+  {
+    uint128_t xi = input[i];
+    output[i] = (uint64_t)xi;
+  }
+}
+
+inline static void
+Hacl_Bignum_Fproduct_sum_scalar_multiplication_(uint128_t *output, uint64_t *input, uint64_t s)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+  {
+    uint128_t xi = output[i];
+    uint64_t yi = input[i];
+    output[i] = xi + (uint128_t)yi * s;
+  }
+}
+
+inline static void Hacl_Bignum_Fproduct_carry_wide_(uint128_t *tmp)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)4U; i = i + (uint32_t)1U)
+  {
+    uint32_t ctr = i;
+    uint128_t tctr = tmp[ctr];
+    uint128_t tctrp1 = tmp[ctr + (uint32_t)1U];
+    uint64_t r0 = (uint64_t)tctr & (uint64_t)0x7ffffffffffffU;
+    uint128_t c = tctr >> (uint32_t)51U;
+    tmp[ctr] = (uint128_t)r0;
+    tmp[ctr + (uint32_t)1U] = tctrp1 + c;
+  }
+}
+
+inline static void Hacl_Bignum_Fmul_shift_reduce(uint64_t *output)
+{
+  uint64_t tmp = output[4U];
+  uint64_t b0;
+  {
+    uint32_t i;
+    for (i = (uint32_t)0U; i < (uint32_t)4U; i = i + (uint32_t)1U)
+    {
+      uint32_t ctr = (uint32_t)5U - i - (uint32_t)1U;
+      uint64_t z = output[ctr - (uint32_t)1U];
+      output[ctr] = z;
+    }
+  }
+  output[0U] = tmp;
+  b0 = output[0U];
+  output[0U] = (uint64_t)19U * b0;
+}
+
+static void
+Hacl_Bignum_Fmul_mul_shift_reduce_(uint128_t *output, uint64_t *input, uint64_t *input2)
+{
+  uint32_t i;
+  uint64_t input2i;
+  {
+    uint32_t i0;
+    for (i0 = (uint32_t)0U; i0 < (uint32_t)4U; i0 = i0 + (uint32_t)1U)
+    {
+      uint64_t input2i0 = input2[i0];
+      Hacl_Bignum_Fproduct_sum_scalar_multiplication_(output, input, input2i0);
+      Hacl_Bignum_Fmul_shift_reduce(input);
+    }
+  }
+  i = (uint32_t)4U;
+  input2i = input2[i];
+  Hacl_Bignum_Fproduct_sum_scalar_multiplication_(output, input, input2i);
+}
+
+inline static void Hacl_Bignum_Fmul_fmul(uint64_t *output, uint64_t *input, uint64_t *input2)
+{
+  uint64_t tmp[5U] = { 0U };
+  memcpy(tmp, input, (uint32_t)5U * sizeof input[0U]);
+  KRML_CHECK_SIZE(sizeof (uint128_t), (uint32_t)5U);
+  {
+    uint128_t t[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        t[_i] = (uint128_t)(uint64_t)0U;
+    }
+    {
+      uint128_t b4;
+      uint128_t b0;
+      uint128_t b4_;
+      uint128_t b0_;
+      uint64_t i0;
+      uint64_t i1;
+      uint64_t i0_;
+      uint64_t i1_;
+      Hacl_Bignum_Fmul_mul_shift_reduce_(t, tmp, input2);
+      Hacl_Bignum_Fproduct_carry_wide_(t);
+      b4 = t[4U];
+      b0 = t[0U];
+      b4_ = b4 & (uint128_t)(uint64_t)0x7ffffffffffffU;
+      b0_ = b0 + (uint128_t)(uint64_t)19U * (uint64_t)(b4 >> (uint32_t)51U);
+      t[4U] = b4_;
+      t[0U] = b0_;
+      Hacl_Bignum_Fproduct_copy_from_wide_(output, t);
+      i0 = output[0U];
+      i1 = output[1U];
+      i0_ = i0 & (uint64_t)0x7ffffffffffffU;
+      i1_ = i1 + (i0 >> (uint32_t)51U);
+      output[0U] = i0_;
+      output[1U] = i1_;
+    }
+  }
+}
+
+inline static void Hacl_Bignum_Fsquare_fsquare__(uint128_t *tmp, uint64_t *output)
+{
+  uint64_t r0 = output[0U];
+  uint64_t r1 = output[1U];
+  uint64_t r2 = output[2U];
+  uint64_t r3 = output[3U];
+  uint64_t r4 = output[4U];
+  uint64_t d0 = r0 * (uint64_t)2U;
+  uint64_t d1 = r1 * (uint64_t)2U;
+  uint64_t d2 = r2 * (uint64_t)2U * (uint64_t)19U;
+  uint64_t d419 = r4 * (uint64_t)19U;
+  uint64_t d4 = d419 * (uint64_t)2U;
+  uint128_t s0 = (uint128_t)r0 * r0 + (uint128_t)d4 * r1 + (uint128_t)d2 * r3;
+  uint128_t s1 = (uint128_t)d0 * r1 + (uint128_t)d4 * r2 + (uint128_t)(r3 * (uint64_t)19U) * r3;
+  uint128_t s2 = (uint128_t)d0 * r2 + (uint128_t)r1 * r1 + (uint128_t)d4 * r3;
+  uint128_t s3 = (uint128_t)d0 * r3 + (uint128_t)d1 * r2 + (uint128_t)r4 * d419;
+  uint128_t s4 = (uint128_t)d0 * r4 + (uint128_t)d1 * r3 + (uint128_t)r2 * r2;
+  tmp[0U] = s0;
+  tmp[1U] = s1;
+  tmp[2U] = s2;
+  tmp[3U] = s3;
+  tmp[4U] = s4;
+}
+
+inline static void Hacl_Bignum_Fsquare_fsquare_(uint128_t *tmp, uint64_t *output)
+{
+  uint128_t b4;
+  uint128_t b0;
+  uint128_t b4_;
+  uint128_t b0_;
+  uint64_t i0;
+  uint64_t i1;
+  uint64_t i0_;
+  uint64_t i1_;
+  Hacl_Bignum_Fsquare_fsquare__(tmp, output);
+  Hacl_Bignum_Fproduct_carry_wide_(tmp);
+  b4 = tmp[4U];
+  b0 = tmp[0U];
+  b4_ = b4 & (uint128_t)(uint64_t)0x7ffffffffffffU;
+  b0_ = b0 + (uint128_t)(uint64_t)19U * (uint64_t)(b4 >> (uint32_t)51U);
+  tmp[4U] = b4_;
+  tmp[0U] = b0_;
+  Hacl_Bignum_Fproduct_copy_from_wide_(output, tmp);
+  i0 = output[0U];
+  i1 = output[1U];
+  i0_ = i0 & (uint64_t)0x7ffffffffffffU;
+  i1_ = i1 + (i0 >> (uint32_t)51U);
+  output[0U] = i0_;
+  output[1U] = i1_;
+}
+
+static void
+Hacl_Bignum_Fsquare_fsquare_times_(uint64_t *input, uint128_t *tmp, uint32_t count1)
+{
+  uint32_t i;
+  Hacl_Bignum_Fsquare_fsquare_(tmp, input);
+  for (i = (uint32_t)1U; i < count1; i = i + (uint32_t)1U)
+    Hacl_Bignum_Fsquare_fsquare_(tmp, input);
+}
+
+inline static void
+Hacl_Bignum_Fsquare_fsquare_times(uint64_t *output, uint64_t *input, uint32_t count1)
+{
+  KRML_CHECK_SIZE(sizeof (uint128_t), (uint32_t)5U);
+  {
+    uint128_t t[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        t[_i] = (uint128_t)(uint64_t)0U;
+    }
+    memcpy(output, input, (uint32_t)5U * sizeof input[0U]);
+    Hacl_Bignum_Fsquare_fsquare_times_(output, t, count1);
+  }
+}
+
+inline static void Hacl_Bignum_Fsquare_fsquare_times_inplace(uint64_t *output, uint32_t count1)
+{
+  KRML_CHECK_SIZE(sizeof (uint128_t), (uint32_t)5U);
+  {
+    uint128_t t[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        t[_i] = (uint128_t)(uint64_t)0U;
+    }
+    Hacl_Bignum_Fsquare_fsquare_times_(output, t, count1);
+  }
+}
+
+inline static void Hacl_Bignum_Crecip_crecip(uint64_t *out, uint64_t *z)
+{
+  uint64_t buf[20U] = { 0U };
+  uint64_t *a0 = buf;
+  uint64_t *t00 = buf + (uint32_t)5U;
+  uint64_t *b0 = buf + (uint32_t)10U;
+  uint64_t *t01;
+  uint64_t *b1;
+  uint64_t *c0;
+  uint64_t *a;
+  uint64_t *t0;
+  uint64_t *b;
+  uint64_t *c;
+  Hacl_Bignum_Fsquare_fsquare_times(a0, z, (uint32_t)1U);
+  Hacl_Bignum_Fsquare_fsquare_times(t00, a0, (uint32_t)2U);
+  Hacl_Bignum_Fmul_fmul(b0, t00, z);
+  Hacl_Bignum_Fmul_fmul(a0, b0, a0);
+  Hacl_Bignum_Fsquare_fsquare_times(t00, a0, (uint32_t)1U);
+  Hacl_Bignum_Fmul_fmul(b0, t00, b0);
+  Hacl_Bignum_Fsquare_fsquare_times(t00, b0, (uint32_t)5U);
+  t01 = buf + (uint32_t)5U;
+  b1 = buf + (uint32_t)10U;
+  c0 = buf + (uint32_t)15U;
+  Hacl_Bignum_Fmul_fmul(b1, t01, b1);
+  Hacl_Bignum_Fsquare_fsquare_times(t01, b1, (uint32_t)10U);
+  Hacl_Bignum_Fmul_fmul(c0, t01, b1);
+  Hacl_Bignum_Fsquare_fsquare_times(t01, c0, (uint32_t)20U);
+  Hacl_Bignum_Fmul_fmul(t01, t01, c0);
+  Hacl_Bignum_Fsquare_fsquare_times_inplace(t01, (uint32_t)10U);
+  Hacl_Bignum_Fmul_fmul(b1, t01, b1);
+  Hacl_Bignum_Fsquare_fsquare_times(t01, b1, (uint32_t)50U);
+  a = buf;
+  t0 = buf + (uint32_t)5U;
+  b = buf + (uint32_t)10U;
+  c = buf + (uint32_t)15U;
+  Hacl_Bignum_Fmul_fmul(c, t0, b);
+  Hacl_Bignum_Fsquare_fsquare_times(t0, c, (uint32_t)100U);
+  Hacl_Bignum_Fmul_fmul(t0, t0, c);
+  Hacl_Bignum_Fsquare_fsquare_times_inplace(t0, (uint32_t)50U);
+  Hacl_Bignum_Fmul_fmul(t0, t0, b);
+  Hacl_Bignum_Fsquare_fsquare_times_inplace(t0, (uint32_t)5U);
+  Hacl_Bignum_Fmul_fmul(out, t0, a);
+}
+
+inline static void Hacl_Bignum_fsum(uint64_t *a, uint64_t *b)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+  {
+    uint64_t xi = a[i];
+    uint64_t yi = b[i];
+    a[i] = xi + yi;
+  }
+}
+
+inline static void Hacl_Bignum_fdifference(uint64_t *a, uint64_t *b)
+{
+  uint64_t tmp[5U] = { 0U };
+  uint64_t b0;
+  uint64_t b1;
+  uint64_t b2;
+  uint64_t b3;
+  uint64_t b4;
+  memcpy(tmp, b, (uint32_t)5U * sizeof b[0U]);
+  b0 = tmp[0U];
+  b1 = tmp[1U];
+  b2 = tmp[2U];
+  b3 = tmp[3U];
+  b4 = tmp[4U];
+  tmp[0U] = b0 + (uint64_t)0x3fffffffffff68U;
+  tmp[1U] = b1 + (uint64_t)0x3ffffffffffff8U;
+  tmp[2U] = b2 + (uint64_t)0x3ffffffffffff8U;
+  tmp[3U] = b3 + (uint64_t)0x3ffffffffffff8U;
+  tmp[4U] = b4 + (uint64_t)0x3ffffffffffff8U;
+  {
+    uint32_t i;
+    for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+    {
+      uint64_t xi = a[i];
+      uint64_t yi = tmp[i];
+      a[i] = yi - xi;
+    }
+  }
+}
+
+inline static void Hacl_Bignum_fscalar(uint64_t *output, uint64_t *b, uint64_t s)
+{
+  KRML_CHECK_SIZE(sizeof (uint128_t), (uint32_t)5U);
+  {
+    uint128_t tmp[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        tmp[_i] = (uint128_t)(uint64_t)0U;
+    }
+    {
+      uint128_t b4;
+      uint128_t b0;
+      uint128_t b4_;
+      uint128_t b0_;
+      {
+        uint32_t i;
+        for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+        {
+          uint64_t xi = b[i];
+          tmp[i] = (uint128_t)xi * s;
+        }
+      }
+      Hacl_Bignum_Fproduct_carry_wide_(tmp);
+      b4 = tmp[4U];
+      b0 = tmp[0U];
+      b4_ = b4 & (uint128_t)(uint64_t)0x7ffffffffffffU;
+      b0_ = b0 + (uint128_t)(uint64_t)19U * (uint64_t)(b4 >> (uint32_t)51U);
+      tmp[4U] = b4_;
+      tmp[0U] = b0_;
+      Hacl_Bignum_Fproduct_copy_from_wide_(output, tmp);
+    }
+  }
+}
+
+inline static void Hacl_Bignum_fmul(uint64_t *output, uint64_t *a, uint64_t *b)
+{
+  Hacl_Bignum_Fmul_fmul(output, a, b);
+}
+
+inline static void Hacl_Bignum_crecip(uint64_t *output, uint64_t *input)
+{
+  Hacl_Bignum_Crecip_crecip(output, input);
+}
+
+static void
+Hacl_EC_Point_swap_conditional_step(uint64_t *a, uint64_t *b, uint64_t swap1, uint32_t ctr)
+{
+  uint32_t i = ctr - (uint32_t)1U;
+  uint64_t ai = a[i];
+  uint64_t bi = b[i];
+  uint64_t x = swap1 & (ai ^ bi);
+  uint64_t ai1 = ai ^ x;
+  uint64_t bi1 = bi ^ x;
+  a[i] = ai1;
+  b[i] = bi1;
+}
+
+static void
+Hacl_EC_Point_swap_conditional_(uint64_t *a, uint64_t *b, uint64_t swap1, uint32_t ctr)
+{
+  if (!(ctr == (uint32_t)0U))
+  {
+    uint32_t i;
+    Hacl_EC_Point_swap_conditional_step(a, b, swap1, ctr);
+    i = ctr - (uint32_t)1U;
+    Hacl_EC_Point_swap_conditional_(a, b, swap1, i);
+  }
+}
+
+static void Hacl_EC_Point_swap_conditional(uint64_t *a, uint64_t *b, uint64_t iswap)
+{
+  uint64_t swap1 = (uint64_t)0U - iswap;
+  Hacl_EC_Point_swap_conditional_(a, b, swap1, (uint32_t)5U);
+  Hacl_EC_Point_swap_conditional_(a + (uint32_t)5U, b + (uint32_t)5U, swap1, (uint32_t)5U);
+}
+
+static void Hacl_EC_Point_copy(uint64_t *output, uint64_t *input)
+{
+  memcpy(output, input, (uint32_t)5U * sizeof input[0U]);
+  memcpy(output + (uint32_t)5U,
+    input + (uint32_t)5U,
+    (uint32_t)5U * sizeof (input + (uint32_t)5U)[0U]);
+}
+
+static void Hacl_EC_Format_fexpand(uint64_t *output, uint8_t *input)
+{
+  uint64_t i0 = load64_le(input);
+  uint8_t *x00 = input + (uint32_t)6U;
+  uint64_t i1 = load64_le(x00);
+  uint8_t *x01 = input + (uint32_t)12U;
+  uint64_t i2 = load64_le(x01);
+  uint8_t *x02 = input + (uint32_t)19U;
+  uint64_t i3 = load64_le(x02);
+  uint8_t *x0 = input + (uint32_t)24U;
+  uint64_t i4 = load64_le(x0);
+  uint64_t output0 = i0 & (uint64_t)0x7ffffffffffffU;
+  uint64_t output1 = i1 >> (uint32_t)3U & (uint64_t)0x7ffffffffffffU;
+  uint64_t output2 = i2 >> (uint32_t)6U & (uint64_t)0x7ffffffffffffU;
+  uint64_t output3 = i3 >> (uint32_t)1U & (uint64_t)0x7ffffffffffffU;
+  uint64_t output4 = i4 >> (uint32_t)12U & (uint64_t)0x7ffffffffffffU;
+  output[0U] = output0;
+  output[1U] = output1;
+  output[2U] = output2;
+  output[3U] = output3;
+  output[4U] = output4;
+}
+
+static void Hacl_EC_Format_fcontract_first_carry_pass(uint64_t *input)
+{
+  uint64_t t0 = input[0U];
+  uint64_t t1 = input[1U];
+  uint64_t t2 = input[2U];
+  uint64_t t3 = input[3U];
+  uint64_t t4 = input[4U];
+  uint64_t t1_ = t1 + (t0 >> (uint32_t)51U);
+  uint64_t t0_ = t0 & (uint64_t)0x7ffffffffffffU;
+  uint64_t t2_ = t2 + (t1_ >> (uint32_t)51U);
+  uint64_t t1__ = t1_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t3_ = t3 + (t2_ >> (uint32_t)51U);
+  uint64_t t2__ = t2_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t4_ = t4 + (t3_ >> (uint32_t)51U);
+  uint64_t t3__ = t3_ & (uint64_t)0x7ffffffffffffU;
+  input[0U] = t0_;
+  input[1U] = t1__;
+  input[2U] = t2__;
+  input[3U] = t3__;
+  input[4U] = t4_;
+}
+
+static void Hacl_EC_Format_fcontract_first_carry_full(uint64_t *input)
+{
+  Hacl_EC_Format_fcontract_first_carry_pass(input);
+  Hacl_Bignum_Modulo_carry_top(input);
+}
+
+static void Hacl_EC_Format_fcontract_second_carry_pass(uint64_t *input)
+{
+  uint64_t t0 = input[0U];
+  uint64_t t1 = input[1U];
+  uint64_t t2 = input[2U];
+  uint64_t t3 = input[3U];
+  uint64_t t4 = input[4U];
+  uint64_t t1_ = t1 + (t0 >> (uint32_t)51U);
+  uint64_t t0_ = t0 & (uint64_t)0x7ffffffffffffU;
+  uint64_t t2_ = t2 + (t1_ >> (uint32_t)51U);
+  uint64_t t1__ = t1_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t3_ = t3 + (t2_ >> (uint32_t)51U);
+  uint64_t t2__ = t2_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t4_ = t4 + (t3_ >> (uint32_t)51U);
+  uint64_t t3__ = t3_ & (uint64_t)0x7ffffffffffffU;
+  input[0U] = t0_;
+  input[1U] = t1__;
+  input[2U] = t2__;
+  input[3U] = t3__;
+  input[4U] = t4_;
+}
+
+static void Hacl_EC_Format_fcontract_second_carry_full(uint64_t *input)
+{
+  uint64_t i0;
+  uint64_t i1;
+  uint64_t i0_;
+  uint64_t i1_;
+  Hacl_EC_Format_fcontract_second_carry_pass(input);
+  Hacl_Bignum_Modulo_carry_top(input);
+  i0 = input[0U];
+  i1 = input[1U];
+  i0_ = i0 & (uint64_t)0x7ffffffffffffU;
+  i1_ = i1 + (i0 >> (uint32_t)51U);
+  input[0U] = i0_;
+  input[1U] = i1_;
+}
+
+static void Hacl_EC_Format_fcontract_trim(uint64_t *input)
+{
+  uint64_t a0 = input[0U];
+  uint64_t a1 = input[1U];
+  uint64_t a2 = input[2U];
+  uint64_t a3 = input[3U];
+  uint64_t a4 = input[4U];
+  uint64_t mask0 = FStar_UInt64_gte_mask(a0, (uint64_t)0x7ffffffffffedU);
+  uint64_t mask1 = FStar_UInt64_eq_mask(a1, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask2 = FStar_UInt64_eq_mask(a2, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask3 = FStar_UInt64_eq_mask(a3, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask4 = FStar_UInt64_eq_mask(a4, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask = (((mask0 & mask1) & mask2) & mask3) & mask4;
+  uint64_t a0_ = a0 - ((uint64_t)0x7ffffffffffedU & mask);
+  uint64_t a1_ = a1 - ((uint64_t)0x7ffffffffffffU & mask);
+  uint64_t a2_ = a2 - ((uint64_t)0x7ffffffffffffU & mask);
+  uint64_t a3_ = a3 - ((uint64_t)0x7ffffffffffffU & mask);
+  uint64_t a4_ = a4 - ((uint64_t)0x7ffffffffffffU & mask);
+  input[0U] = a0_;
+  input[1U] = a1_;
+  input[2U] = a2_;
+  input[3U] = a3_;
+  input[4U] = a4_;
+}
+
+static void Hacl_EC_Format_fcontract_store(uint8_t *output, uint64_t *input)
+{
+  uint64_t t0 = input[0U];
+  uint64_t t1 = input[1U];
+  uint64_t t2 = input[2U];
+  uint64_t t3 = input[3U];
+  uint64_t t4 = input[4U];
+  uint64_t o0 = t1 << (uint32_t)51U | t0;
+  uint64_t o1 = t2 << (uint32_t)38U | t1 >> (uint32_t)13U;
+  uint64_t o2 = t3 << (uint32_t)25U | t2 >> (uint32_t)26U;
+  uint64_t o3 = t4 << (uint32_t)12U | t3 >> (uint32_t)39U;
+  uint8_t *b0 = output;
+  uint8_t *b1 = output + (uint32_t)8U;
+  uint8_t *b2 = output + (uint32_t)16U;
+  uint8_t *b3 = output + (uint32_t)24U;
+  store64_le(b0, o0);
+  store64_le(b1, o1);
+  store64_le(b2, o2);
+  store64_le(b3, o3);
+}
+
+static void Hacl_EC_Format_fcontract(uint8_t *output, uint64_t *input)
+{
+  Hacl_EC_Format_fcontract_first_carry_full(input);
+  Hacl_EC_Format_fcontract_second_carry_full(input);
+  Hacl_EC_Format_fcontract_trim(input);
+  Hacl_EC_Format_fcontract_store(output, input);
+}
+
+static void Hacl_EC_Format_scalar_of_point(uint8_t *scalar, uint64_t *point)
+{
+  uint64_t *x = point;
+  uint64_t *z = point + (uint32_t)5U;
+  uint64_t buf[10U] = { 0U };
+  uint64_t *zmone = buf;
+  uint64_t *sc = buf + (uint32_t)5U;
+  Hacl_Bignum_crecip(zmone, z);
+  Hacl_Bignum_fmul(sc, x, zmone);
+  Hacl_EC_Format_fcontract(scalar, sc);
+}
+
+static void
+Hacl_EC_AddAndDouble_fmonty(
+  uint64_t *pp,
+  uint64_t *ppq,
+  uint64_t *p,
+  uint64_t *pq,
+  uint64_t *qmqp
+)
+{
+  uint64_t *qx = qmqp;
+  uint64_t *x2 = pp;
+  uint64_t *z2 = pp + (uint32_t)5U;
+  uint64_t *x3 = ppq;
+  uint64_t *z3 = ppq + (uint32_t)5U;
+  uint64_t *x = p;
+  uint64_t *z = p + (uint32_t)5U;
+  uint64_t *xprime = pq;
+  uint64_t *zprime = pq + (uint32_t)5U;
+  uint64_t buf[40U] = { 0U };
+  uint64_t *origx = buf;
+  uint64_t *origxprime0 = buf + (uint32_t)5U;
+  uint64_t *xxprime0 = buf + (uint32_t)25U;
+  uint64_t *zzprime0 = buf + (uint32_t)30U;
+  uint64_t *origxprime;
+  uint64_t *xx0;
+  uint64_t *zz0;
+  uint64_t *xxprime;
+  uint64_t *zzprime;
+  uint64_t *zzzprime;
+  uint64_t *zzz;
+  uint64_t *xx;
+  uint64_t *zz;
+  uint64_t scalar;
+  memcpy(origx, x, (uint32_t)5U * sizeof x[0U]);
+  Hacl_Bignum_fsum(x, z);
+  Hacl_Bignum_fdifference(z, origx);
+  memcpy(origxprime0, xprime, (uint32_t)5U * sizeof xprime[0U]);
+  Hacl_Bignum_fsum(xprime, zprime);
+  Hacl_Bignum_fdifference(zprime, origxprime0);
+  Hacl_Bignum_fmul(xxprime0, xprime, z);
+  Hacl_Bignum_fmul(zzprime0, x, zprime);
+  origxprime = buf + (uint32_t)5U;
+  xx0 = buf + (uint32_t)15U;
+  zz0 = buf + (uint32_t)20U;
+  xxprime = buf + (uint32_t)25U;
+  zzprime = buf + (uint32_t)30U;
+  zzzprime = buf + (uint32_t)35U;
+  memcpy(origxprime, xxprime, (uint32_t)5U * sizeof xxprime[0U]);
+  Hacl_Bignum_fsum(xxprime, zzprime);
+  Hacl_Bignum_fdifference(zzprime, origxprime);
+  Hacl_Bignum_Fsquare_fsquare_times(x3, xxprime, (uint32_t)1U);
+  Hacl_Bignum_Fsquare_fsquare_times(zzzprime, zzprime, (uint32_t)1U);
+  Hacl_Bignum_fmul(z3, zzzprime, qx);
+  Hacl_Bignum_Fsquare_fsquare_times(xx0, x, (uint32_t)1U);
+  Hacl_Bignum_Fsquare_fsquare_times(zz0, z, (uint32_t)1U);
+  zzz = buf + (uint32_t)10U;
+  xx = buf + (uint32_t)15U;
+  zz = buf + (uint32_t)20U;
+  Hacl_Bignum_fmul(x2, xx, zz);
+  Hacl_Bignum_fdifference(zz, xx);
+  scalar = (uint64_t)121665U;
+  Hacl_Bignum_fscalar(zzz, zz, scalar);
+  Hacl_Bignum_fsum(zzz, xx);
+  Hacl_Bignum_fmul(z2, zzz, zz);
+}
+
+static void
+Hacl_EC_Ladder_SmallLoop_cmult_small_loop_step(
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint8_t byt
+)
+{
+  uint64_t bit0 = (uint64_t)(byt >> (uint32_t)7U);
+  uint64_t bit;
+  Hacl_EC_Point_swap_conditional(nq, nqpq, bit0);
+  Hacl_EC_AddAndDouble_fmonty(nq2, nqpq2, nq, nqpq, q);
+  bit = (uint64_t)(byt >> (uint32_t)7U);
+  Hacl_EC_Point_swap_conditional(nq2, nqpq2, bit);
+}
+
+static void
+Hacl_EC_Ladder_SmallLoop_cmult_small_loop_double_step(
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint8_t byt
+)
+{
+  uint8_t byt1;
+  Hacl_EC_Ladder_SmallLoop_cmult_small_loop_step(nq, nqpq, nq2, nqpq2, q, byt);
+  byt1 = byt << (uint32_t)1U;
+  Hacl_EC_Ladder_SmallLoop_cmult_small_loop_step(nq2, nqpq2, nq, nqpq, q, byt1);
+}
+
+static void
+Hacl_EC_Ladder_SmallLoop_cmult_small_loop(
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint8_t byt,
+  uint32_t i
+)
+{
+  if (!(i == (uint32_t)0U))
+  {
+    uint32_t i_ = i - (uint32_t)1U;
+    uint8_t byt_;
+    Hacl_EC_Ladder_SmallLoop_cmult_small_loop_double_step(nq, nqpq, nq2, nqpq2, q, byt);
+    byt_ = byt << (uint32_t)2U;
+    Hacl_EC_Ladder_SmallLoop_cmult_small_loop(nq, nqpq, nq2, nqpq2, q, byt_, i_);
+  }
+}
+
+static void
+Hacl_EC_Ladder_BigLoop_cmult_big_loop(
+  uint8_t *n1,
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint32_t i
+)
+{
+  if (!(i == (uint32_t)0U))
+  {
+    uint32_t i1 = i - (uint32_t)1U;
+    uint8_t byte = n1[i1];
+    Hacl_EC_Ladder_SmallLoop_cmult_small_loop(nq, nqpq, nq2, nqpq2, q, byte, (uint32_t)4U);
+    Hacl_EC_Ladder_BigLoop_cmult_big_loop(n1, nq, nqpq, nq2, nqpq2, q, i1);
+  }
+}
+
+static void Hacl_EC_Ladder_cmult(uint64_t *result, uint8_t *n1, uint64_t *q)
+{
+  uint64_t point_buf[40U] = { 0U };
+  uint64_t *nq = point_buf;
+  uint64_t *nqpq = point_buf + (uint32_t)10U;
+  uint64_t *nq2 = point_buf + (uint32_t)20U;
+  uint64_t *nqpq2 = point_buf + (uint32_t)30U;
+  Hacl_EC_Point_copy(nqpq, q);
+  nq[0U] = (uint64_t)1U;
+  Hacl_EC_Ladder_BigLoop_cmult_big_loop(n1, nq, nqpq, nq2, nqpq2, q, (uint32_t)32U);
+  Hacl_EC_Point_copy(result, nq);
+}
+
+void Hacl_Curve25519_crypto_scalarmult(uint8_t *mypublic, uint8_t *secret, uint8_t *basepoint)
+{
+  uint64_t buf0[10U] = { 0U };
+  uint64_t *x0 = buf0;
+  uint64_t *z = buf0 + (uint32_t)5U;
+  uint64_t *q;
+  Hacl_EC_Format_fexpand(x0, basepoint);
+  z[0U] = (uint64_t)1U;
+  q = buf0;
+  {
+    uint8_t e[32U] = { 0U };
+    uint8_t e0;
+    uint8_t e31;
+    uint8_t e01;
+    uint8_t e311;
+    uint8_t e312;
+    uint8_t *scalar;
+    memcpy(e, secret, (uint32_t)32U * sizeof secret[0U]);
+    e0 = e[0U];
+    e31 = e[31U];
+    e01 = e0 & (uint8_t)248U;
+    e311 = e31 & (uint8_t)127U;
+    e312 = e311 | (uint8_t)64U;
+    e[0U] = e01;
+    e[31U] = e312;
+    scalar = e;
+    {
+      uint64_t buf[15U] = { 0U };
+      uint64_t *nq = buf;
+      uint64_t *x = nq;
+      x[0U] = (uint64_t)1U;
+      Hacl_EC_Ladder_cmult(nq, scalar, q);
+      Hacl_EC_Format_scalar_of_point(mypublic, nq);
+    }
+  }
+}
+

mbedtls.mod/mbedtls/3rdparty/everest/library/Hacl_Curve25519_joined.c

@@ -0,0 +1,41 @@
+/*
+ *  Interface to code from Project Everest
+ *
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#include "common.h"
+
+#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
+
+#if defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)
+#define MBEDTLS_HAVE_INT128
+#endif
+
+#if defined(MBEDTLS_HAVE_INT128)
+#include "Hacl_Curve25519.c"
+#else
+#define KRML_VERIFIED_UINT128
+#include "kremlib/FStar_UInt128_extracted.c"
+#include "legacy/Hacl_Curve25519.c"
+#endif
+
+#include "kremlib/FStar_UInt64_FStar_UInt32_FStar_UInt16_FStar_UInt8.c"
+
+#endif /* defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) */
+

mbedtls.mod/mbedtls/3rdparty/everest/library/everest.c

@@ -0,0 +1,107 @@
+/*
+ *  Interface to code from Project Everest
+ *
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of Mbed TLS (https://tls.mbed.org).
+ */
+
+#include "common.h"
+
+#include <string.h>
+
+#include "mbedtls/ecdh.h"
+
+#include "everest/x25519.h"
+#include "everest/everest.h"
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#define mbedtls_calloc calloc
+#define mbedtls_free   free
+#endif
+
+#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
+
+int mbedtls_everest_setup( mbedtls_ecdh_context_everest *ctx, int grp_id )
+{
+    if( grp_id != MBEDTLS_ECP_DP_CURVE25519 )
+        return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
+    mbedtls_x25519_init( &ctx->ctx );
+    return 0;
+}
+
+void mbedtls_everest_free( mbedtls_ecdh_context_everest *ctx )
+{
+    mbedtls_x25519_free( &ctx->ctx );
+}
+
+int mbedtls_everest_make_params( mbedtls_ecdh_context_everest *ctx, size_t *olen,
+                                 unsigned char *buf, size_t blen,
+                                 int( *f_rng )( void *, unsigned char *, size_t ),
+                                 void *p_rng )
+{
+    mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
+    return mbedtls_x25519_make_params( x25519_ctx, olen, buf, blen, f_rng, p_rng );
+}
+
+int mbedtls_everest_read_params( mbedtls_ecdh_context_everest *ctx,
+                                 const unsigned char **buf,
+                                 const unsigned char *end )
+{
+    mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
+    return mbedtls_x25519_read_params( x25519_ctx, buf, end );
+}
+
+int mbedtls_everest_get_params( mbedtls_ecdh_context_everest *ctx,
+                                const mbedtls_ecp_keypair *key,
+                                mbedtls_everest_ecdh_side side )
+{
+    mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
+    mbedtls_x25519_ecdh_side s = side == MBEDTLS_EVEREST_ECDH_OURS ?
+                                            MBEDTLS_X25519_ECDH_OURS :
+                                            MBEDTLS_X25519_ECDH_THEIRS;
+    return mbedtls_x25519_get_params( x25519_ctx, key, s );
+}
+
+int mbedtls_everest_make_public( mbedtls_ecdh_context_everest *ctx, size_t *olen,
+                                 unsigned char *buf, size_t blen,
+                                 int( *f_rng )( void *, unsigned char *, size_t ),
+                                 void *p_rng )
+{
+    mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
+    return mbedtls_x25519_make_public( x25519_ctx, olen, buf, blen, f_rng, p_rng );
+}
+
+int mbedtls_everest_read_public( mbedtls_ecdh_context_everest *ctx,
+                                 const unsigned char *buf, size_t blen )
+{
+    mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
+    return mbedtls_x25519_read_public ( x25519_ctx, buf, blen );
+}
+
+int mbedtls_everest_calc_secret( mbedtls_ecdh_context_everest *ctx, size_t *olen,
+                                 unsigned char *buf, size_t blen,
+                                 int( *f_rng )( void *, unsigned char *, size_t ),
+                                 void *p_rng )
+{
+    mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
+    return mbedtls_x25519_calc_secret( x25519_ctx, olen, buf, blen, f_rng, p_rng );
+}
+
+#endif /* MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED */
+

mbedtls.mod/mbedtls/3rdparty/everest/library/legacy/Hacl_Curve25519.c

@@ -0,0 +1,805 @@
+/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved.
+   Licensed under the Apache 2.0 License. */
+
+/* This file was generated by KreMLin <https://github.com/FStarLang/kremlin>
+ * KreMLin invocation: /mnt/e/everest/verify/kremlin/krml -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -fc89 -fparentheses -fno-shadow -header /mnt/e/everest/verify/hdrcLh -minimal -I /mnt/e/everest/verify/hacl-star/code/lib/kremlin -I /mnt/e/everest/verify/kremlin/kremlib/compat -I /mnt/e/everest/verify/hacl-star/specs -I /mnt/e/everest/verify/hacl-star/specs/old -I . -ccopt -march=native -verbose -ldopt -flto -tmpdir x25519-c -I ../bignum -bundle Hacl.Curve25519=* -minimal -add-include "kremlib.h" -skip-compilation x25519-c/out.krml -o x25519-c/Hacl_Curve25519.c
+ * F* version: 059db0c8
+ * KreMLin version: 916c37ac
+ */
+
+
+#include "Hacl_Curve25519.h"
+
+extern uint64_t FStar_UInt64_eq_mask(uint64_t x0, uint64_t x1);
+
+extern uint64_t FStar_UInt64_gte_mask(uint64_t x0, uint64_t x1);
+
+extern FStar_UInt128_uint128
+FStar_UInt128_add(FStar_UInt128_uint128 x0, FStar_UInt128_uint128 x1);
+
+extern FStar_UInt128_uint128
+FStar_UInt128_add_mod(FStar_UInt128_uint128 x0, FStar_UInt128_uint128 x1);
+
+extern FStar_UInt128_uint128
+FStar_UInt128_logand(FStar_UInt128_uint128 x0, FStar_UInt128_uint128 x1);
+
+extern FStar_UInt128_uint128 FStar_UInt128_shift_right(FStar_UInt128_uint128 x0, uint32_t x1);
+
+extern FStar_UInt128_uint128 FStar_UInt128_uint64_to_uint128(uint64_t x0);
+
+extern uint64_t FStar_UInt128_uint128_to_uint64(FStar_UInt128_uint128 x0);
+
+extern FStar_UInt128_uint128 FStar_UInt128_mul_wide(uint64_t x0, uint64_t x1);
+
+static void Hacl_Bignum_Modulo_carry_top(uint64_t *b)
+{
+  uint64_t b4 = b[4U];
+  uint64_t b0 = b[0U];
+  uint64_t b4_ = b4 & (uint64_t)0x7ffffffffffffU;
+  uint64_t b0_ = b0 + (uint64_t)19U * (b4 >> (uint32_t)51U);
+  b[4U] = b4_;
+  b[0U] = b0_;
+}
+
+inline static void
+Hacl_Bignum_Fproduct_copy_from_wide_(uint64_t *output, FStar_UInt128_uint128 *input)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+  {
+    FStar_UInt128_uint128 xi = input[i];
+    output[i] = FStar_UInt128_uint128_to_uint64(xi);
+  }
+}
+
+inline static void
+Hacl_Bignum_Fproduct_sum_scalar_multiplication_(
+  FStar_UInt128_uint128 *output,
+  uint64_t *input,
+  uint64_t s
+)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+  {
+    FStar_UInt128_uint128 xi = output[i];
+    uint64_t yi = input[i];
+    output[i] = FStar_UInt128_add_mod(xi, FStar_UInt128_mul_wide(yi, s));
+  }
+}
+
+inline static void Hacl_Bignum_Fproduct_carry_wide_(FStar_UInt128_uint128 *tmp)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)4U; i = i + (uint32_t)1U)
+  {
+    uint32_t ctr = i;
+    FStar_UInt128_uint128 tctr = tmp[ctr];
+    FStar_UInt128_uint128 tctrp1 = tmp[ctr + (uint32_t)1U];
+    uint64_t r0 = FStar_UInt128_uint128_to_uint64(tctr) & (uint64_t)0x7ffffffffffffU;
+    FStar_UInt128_uint128 c = FStar_UInt128_shift_right(tctr, (uint32_t)51U);
+    tmp[ctr] = FStar_UInt128_uint64_to_uint128(r0);
+    tmp[ctr + (uint32_t)1U] = FStar_UInt128_add(tctrp1, c);
+  }
+}
+
+inline static void Hacl_Bignum_Fmul_shift_reduce(uint64_t *output)
+{
+  uint64_t tmp = output[4U];
+  uint64_t b0;
+  {
+    uint32_t i;
+    for (i = (uint32_t)0U; i < (uint32_t)4U; i = i + (uint32_t)1U)
+    {
+      uint32_t ctr = (uint32_t)5U - i - (uint32_t)1U;
+      uint64_t z = output[ctr - (uint32_t)1U];
+      output[ctr] = z;
+    }
+  }
+  output[0U] = tmp;
+  b0 = output[0U];
+  output[0U] = (uint64_t)19U * b0;
+}
+
+static void
+Hacl_Bignum_Fmul_mul_shift_reduce_(
+  FStar_UInt128_uint128 *output,
+  uint64_t *input,
+  uint64_t *input2
+)
+{
+  uint32_t i;
+  uint64_t input2i;
+  {
+    uint32_t i0;
+    for (i0 = (uint32_t)0U; i0 < (uint32_t)4U; i0 = i0 + (uint32_t)1U)
+    {
+      uint64_t input2i0 = input2[i0];
+      Hacl_Bignum_Fproduct_sum_scalar_multiplication_(output, input, input2i0);
+      Hacl_Bignum_Fmul_shift_reduce(input);
+    }
+  }
+  i = (uint32_t)4U;
+  input2i = input2[i];
+  Hacl_Bignum_Fproduct_sum_scalar_multiplication_(output, input, input2i);
+}
+
+inline static void Hacl_Bignum_Fmul_fmul(uint64_t *output, uint64_t *input, uint64_t *input2)
+{
+  uint64_t tmp[5U] = { 0U };
+  memcpy(tmp, input, (uint32_t)5U * sizeof input[0U]);
+  KRML_CHECK_SIZE(sizeof (FStar_UInt128_uint128), (uint32_t)5U);
+  {
+    FStar_UInt128_uint128 t[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        t[_i] = FStar_UInt128_uint64_to_uint128((uint64_t)0U);
+    }
+    {
+      FStar_UInt128_uint128 b4;
+      FStar_UInt128_uint128 b0;
+      FStar_UInt128_uint128 b4_;
+      FStar_UInt128_uint128 b0_;
+      uint64_t i0;
+      uint64_t i1;
+      uint64_t i0_;
+      uint64_t i1_;
+      Hacl_Bignum_Fmul_mul_shift_reduce_(t, tmp, input2);
+      Hacl_Bignum_Fproduct_carry_wide_(t);
+      b4 = t[4U];
+      b0 = t[0U];
+      b4_ = FStar_UInt128_logand(b4, FStar_UInt128_uint64_to_uint128((uint64_t)0x7ffffffffffffU));
+      b0_ =
+        FStar_UInt128_add(b0,
+          FStar_UInt128_mul_wide((uint64_t)19U,
+            FStar_UInt128_uint128_to_uint64(FStar_UInt128_shift_right(b4, (uint32_t)51U))));
+      t[4U] = b4_;
+      t[0U] = b0_;
+      Hacl_Bignum_Fproduct_copy_from_wide_(output, t);
+      i0 = output[0U];
+      i1 = output[1U];
+      i0_ = i0 & (uint64_t)0x7ffffffffffffU;
+      i1_ = i1 + (i0 >> (uint32_t)51U);
+      output[0U] = i0_;
+      output[1U] = i1_;
+    }
+  }
+}
+
+inline static void Hacl_Bignum_Fsquare_fsquare__(FStar_UInt128_uint128 *tmp, uint64_t *output)
+{
+  uint64_t r0 = output[0U];
+  uint64_t r1 = output[1U];
+  uint64_t r2 = output[2U];
+  uint64_t r3 = output[3U];
+  uint64_t r4 = output[4U];
+  uint64_t d0 = r0 * (uint64_t)2U;
+  uint64_t d1 = r1 * (uint64_t)2U;
+  uint64_t d2 = r2 * (uint64_t)2U * (uint64_t)19U;
+  uint64_t d419 = r4 * (uint64_t)19U;
+  uint64_t d4 = d419 * (uint64_t)2U;
+  FStar_UInt128_uint128
+  s0 =
+    FStar_UInt128_add(FStar_UInt128_add(FStar_UInt128_mul_wide(r0, r0),
+        FStar_UInt128_mul_wide(d4, r1)),
+      FStar_UInt128_mul_wide(d2, r3));
+  FStar_UInt128_uint128
+  s1 =
+    FStar_UInt128_add(FStar_UInt128_add(FStar_UInt128_mul_wide(d0, r1),
+        FStar_UInt128_mul_wide(d4, r2)),
+      FStar_UInt128_mul_wide(r3 * (uint64_t)19U, r3));
+  FStar_UInt128_uint128
+  s2 =
+    FStar_UInt128_add(FStar_UInt128_add(FStar_UInt128_mul_wide(d0, r2),
+        FStar_UInt128_mul_wide(r1, r1)),
+      FStar_UInt128_mul_wide(d4, r3));
+  FStar_UInt128_uint128
+  s3 =
+    FStar_UInt128_add(FStar_UInt128_add(FStar_UInt128_mul_wide(d0, r3),
+        FStar_UInt128_mul_wide(d1, r2)),
+      FStar_UInt128_mul_wide(r4, d419));
+  FStar_UInt128_uint128
+  s4 =
+    FStar_UInt128_add(FStar_UInt128_add(FStar_UInt128_mul_wide(d0, r4),
+        FStar_UInt128_mul_wide(d1, r3)),
+      FStar_UInt128_mul_wide(r2, r2));
+  tmp[0U] = s0;
+  tmp[1U] = s1;
+  tmp[2U] = s2;
+  tmp[3U] = s3;
+  tmp[4U] = s4;
+}
+
+inline static void Hacl_Bignum_Fsquare_fsquare_(FStar_UInt128_uint128 *tmp, uint64_t *output)
+{
+  FStar_UInt128_uint128 b4;
+  FStar_UInt128_uint128 b0;
+  FStar_UInt128_uint128 b4_;
+  FStar_UInt128_uint128 b0_;
+  uint64_t i0;
+  uint64_t i1;
+  uint64_t i0_;
+  uint64_t i1_;
+  Hacl_Bignum_Fsquare_fsquare__(tmp, output);
+  Hacl_Bignum_Fproduct_carry_wide_(tmp);
+  b4 = tmp[4U];
+  b0 = tmp[0U];
+  b4_ = FStar_UInt128_logand(b4, FStar_UInt128_uint64_to_uint128((uint64_t)0x7ffffffffffffU));
+  b0_ =
+    FStar_UInt128_add(b0,
+      FStar_UInt128_mul_wide((uint64_t)19U,
+        FStar_UInt128_uint128_to_uint64(FStar_UInt128_shift_right(b4, (uint32_t)51U))));
+  tmp[4U] = b4_;
+  tmp[0U] = b0_;
+  Hacl_Bignum_Fproduct_copy_from_wide_(output, tmp);
+  i0 = output[0U];
+  i1 = output[1U];
+  i0_ = i0 & (uint64_t)0x7ffffffffffffU;
+  i1_ = i1 + (i0 >> (uint32_t)51U);
+  output[0U] = i0_;
+  output[1U] = i1_;
+}
+
+static void
+Hacl_Bignum_Fsquare_fsquare_times_(
+  uint64_t *input,
+  FStar_UInt128_uint128 *tmp,
+  uint32_t count1
+)
+{
+  uint32_t i;
+  Hacl_Bignum_Fsquare_fsquare_(tmp, input);
+  for (i = (uint32_t)1U; i < count1; i = i + (uint32_t)1U)
+    Hacl_Bignum_Fsquare_fsquare_(tmp, input);
+}
+
+inline static void
+Hacl_Bignum_Fsquare_fsquare_times(uint64_t *output, uint64_t *input, uint32_t count1)
+{
+  KRML_CHECK_SIZE(sizeof (FStar_UInt128_uint128), (uint32_t)5U);
+  {
+    FStar_UInt128_uint128 t[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        t[_i] = FStar_UInt128_uint64_to_uint128((uint64_t)0U);
+    }
+    memcpy(output, input, (uint32_t)5U * sizeof input[0U]);
+    Hacl_Bignum_Fsquare_fsquare_times_(output, t, count1);
+  }
+}
+
+inline static void Hacl_Bignum_Fsquare_fsquare_times_inplace(uint64_t *output, uint32_t count1)
+{
+  KRML_CHECK_SIZE(sizeof (FStar_UInt128_uint128), (uint32_t)5U);
+  {
+    FStar_UInt128_uint128 t[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        t[_i] = FStar_UInt128_uint64_to_uint128((uint64_t)0U);
+    }
+    Hacl_Bignum_Fsquare_fsquare_times_(output, t, count1);
+  }
+}
+
+inline static void Hacl_Bignum_Crecip_crecip(uint64_t *out, uint64_t *z)
+{
+  uint64_t buf[20U] = { 0U };
+  uint64_t *a0 = buf;
+  uint64_t *t00 = buf + (uint32_t)5U;
+  uint64_t *b0 = buf + (uint32_t)10U;
+  uint64_t *t01;
+  uint64_t *b1;
+  uint64_t *c0;
+  uint64_t *a;
+  uint64_t *t0;
+  uint64_t *b;
+  uint64_t *c;
+  Hacl_Bignum_Fsquare_fsquare_times(a0, z, (uint32_t)1U);
+  Hacl_Bignum_Fsquare_fsquare_times(t00, a0, (uint32_t)2U);
+  Hacl_Bignum_Fmul_fmul(b0, t00, z);
+  Hacl_Bignum_Fmul_fmul(a0, b0, a0);
+  Hacl_Bignum_Fsquare_fsquare_times(t00, a0, (uint32_t)1U);
+  Hacl_Bignum_Fmul_fmul(b0, t00, b0);
+  Hacl_Bignum_Fsquare_fsquare_times(t00, b0, (uint32_t)5U);
+  t01 = buf + (uint32_t)5U;
+  b1 = buf + (uint32_t)10U;
+  c0 = buf + (uint32_t)15U;
+  Hacl_Bignum_Fmul_fmul(b1, t01, b1);
+  Hacl_Bignum_Fsquare_fsquare_times(t01, b1, (uint32_t)10U);
+  Hacl_Bignum_Fmul_fmul(c0, t01, b1);
+  Hacl_Bignum_Fsquare_fsquare_times(t01, c0, (uint32_t)20U);
+  Hacl_Bignum_Fmul_fmul(t01, t01, c0);
+  Hacl_Bignum_Fsquare_fsquare_times_inplace(t01, (uint32_t)10U);
+  Hacl_Bignum_Fmul_fmul(b1, t01, b1);
+  Hacl_Bignum_Fsquare_fsquare_times(t01, b1, (uint32_t)50U);
+  a = buf;
+  t0 = buf + (uint32_t)5U;
+  b = buf + (uint32_t)10U;
+  c = buf + (uint32_t)15U;
+  Hacl_Bignum_Fmul_fmul(c, t0, b);
+  Hacl_Bignum_Fsquare_fsquare_times(t0, c, (uint32_t)100U);
+  Hacl_Bignum_Fmul_fmul(t0, t0, c);
+  Hacl_Bignum_Fsquare_fsquare_times_inplace(t0, (uint32_t)50U);
+  Hacl_Bignum_Fmul_fmul(t0, t0, b);
+  Hacl_Bignum_Fsquare_fsquare_times_inplace(t0, (uint32_t)5U);
+  Hacl_Bignum_Fmul_fmul(out, t0, a);
+}
+
+inline static void Hacl_Bignum_fsum(uint64_t *a, uint64_t *b)
+{
+  uint32_t i;
+  for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+  {
+    uint64_t xi = a[i];
+    uint64_t yi = b[i];
+    a[i] = xi + yi;
+  }
+}
+
+inline static void Hacl_Bignum_fdifference(uint64_t *a, uint64_t *b)
+{
+  uint64_t tmp[5U] = { 0U };
+  uint64_t b0;
+  uint64_t b1;
+  uint64_t b2;
+  uint64_t b3;
+  uint64_t b4;
+  memcpy(tmp, b, (uint32_t)5U * sizeof b[0U]);
+  b0 = tmp[0U];
+  b1 = tmp[1U];
+  b2 = tmp[2U];
+  b3 = tmp[3U];
+  b4 = tmp[4U];
+  tmp[0U] = b0 + (uint64_t)0x3fffffffffff68U;
+  tmp[1U] = b1 + (uint64_t)0x3ffffffffffff8U;
+  tmp[2U] = b2 + (uint64_t)0x3ffffffffffff8U;
+  tmp[3U] = b3 + (uint64_t)0x3ffffffffffff8U;
+  tmp[4U] = b4 + (uint64_t)0x3ffffffffffff8U;
+  {
+    uint32_t i;
+    for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+    {
+      uint64_t xi = a[i];
+      uint64_t yi = tmp[i];
+      a[i] = yi - xi;
+    }
+  }
+}
+
+inline static void Hacl_Bignum_fscalar(uint64_t *output, uint64_t *b, uint64_t s)
+{
+  KRML_CHECK_SIZE(sizeof (FStar_UInt128_uint128), (uint32_t)5U);
+  {
+    FStar_UInt128_uint128 tmp[5U];
+    {
+      uint32_t _i;
+      for (_i = 0U; _i < (uint32_t)5U; ++_i)
+        tmp[_i] = FStar_UInt128_uint64_to_uint128((uint64_t)0U);
+    }
+    {
+      FStar_UInt128_uint128 b4;
+      FStar_UInt128_uint128 b0;
+      FStar_UInt128_uint128 b4_;
+      FStar_UInt128_uint128 b0_;
+      {
+        uint32_t i;
+        for (i = (uint32_t)0U; i < (uint32_t)5U; i = i + (uint32_t)1U)
+        {
+          uint64_t xi = b[i];
+          tmp[i] = FStar_UInt128_mul_wide(xi, s);
+        }
+      }
+      Hacl_Bignum_Fproduct_carry_wide_(tmp);
+      b4 = tmp[4U];
+      b0 = tmp[0U];
+      b4_ = FStar_UInt128_logand(b4, FStar_UInt128_uint64_to_uint128((uint64_t)0x7ffffffffffffU));
+      b0_ =
+        FStar_UInt128_add(b0,
+          FStar_UInt128_mul_wide((uint64_t)19U,
+            FStar_UInt128_uint128_to_uint64(FStar_UInt128_shift_right(b4, (uint32_t)51U))));
+      tmp[4U] = b4_;
+      tmp[0U] = b0_;
+      Hacl_Bignum_Fproduct_copy_from_wide_(output, tmp);
+    }
+  }
+}
+
+inline static void Hacl_Bignum_fmul(uint64_t *output, uint64_t *a, uint64_t *b)
+{
+  Hacl_Bignum_Fmul_fmul(output, a, b);
+}
+
+inline static void Hacl_Bignum_crecip(uint64_t *output, uint64_t *input)
+{
+  Hacl_Bignum_Crecip_crecip(output, input);
+}
+
+static void
+Hacl_EC_Point_swap_conditional_step(uint64_t *a, uint64_t *b, uint64_t swap1, uint32_t ctr)
+{
+  uint32_t i = ctr - (uint32_t)1U;
+  uint64_t ai = a[i];
+  uint64_t bi = b[i];
+  uint64_t x = swap1 & (ai ^ bi);
+  uint64_t ai1 = ai ^ x;
+  uint64_t bi1 = bi ^ x;
+  a[i] = ai1;
+  b[i] = bi1;
+}
+
+static void
+Hacl_EC_Point_swap_conditional_(uint64_t *a, uint64_t *b, uint64_t swap1, uint32_t ctr)
+{
+  if (!(ctr == (uint32_t)0U))
+  {
+    uint32_t i;
+    Hacl_EC_Point_swap_conditional_step(a, b, swap1, ctr);
+    i = ctr - (uint32_t)1U;
+    Hacl_EC_Point_swap_conditional_(a, b, swap1, i);
+  }
+}
+
+static void Hacl_EC_Point_swap_conditional(uint64_t *a, uint64_t *b, uint64_t iswap)
+{
+  uint64_t swap1 = (uint64_t)0U - iswap;
+  Hacl_EC_Point_swap_conditional_(a, b, swap1, (uint32_t)5U);
+  Hacl_EC_Point_swap_conditional_(a + (uint32_t)5U, b + (uint32_t)5U, swap1, (uint32_t)5U);
+}
+
+static void Hacl_EC_Point_copy(uint64_t *output, uint64_t *input)
+{
+  memcpy(output, input, (uint32_t)5U * sizeof input[0U]);
+  memcpy(output + (uint32_t)5U,
+    input + (uint32_t)5U,
+    (uint32_t)5U * sizeof (input + (uint32_t)5U)[0U]);
+}
+
+static void Hacl_EC_Format_fexpand(uint64_t *output, uint8_t *input)
+{
+  uint64_t i0 = load64_le(input);
+  uint8_t *x00 = input + (uint32_t)6U;
+  uint64_t i1 = load64_le(x00);
+  uint8_t *x01 = input + (uint32_t)12U;
+  uint64_t i2 = load64_le(x01);
+  uint8_t *x02 = input + (uint32_t)19U;
+  uint64_t i3 = load64_le(x02);
+  uint8_t *x0 = input + (uint32_t)24U;
+  uint64_t i4 = load64_le(x0);
+  uint64_t output0 = i0 & (uint64_t)0x7ffffffffffffU;
+  uint64_t output1 = i1 >> (uint32_t)3U & (uint64_t)0x7ffffffffffffU;
+  uint64_t output2 = i2 >> (uint32_t)6U & (uint64_t)0x7ffffffffffffU;
+  uint64_t output3 = i3 >> (uint32_t)1U & (uint64_t)0x7ffffffffffffU;
+  uint64_t output4 = i4 >> (uint32_t)12U & (uint64_t)0x7ffffffffffffU;
+  output[0U] = output0;
+  output[1U] = output1;
+  output[2U] = output2;
+  output[3U] = output3;
+  output[4U] = output4;
+}
+
+static void Hacl_EC_Format_fcontract_first_carry_pass(uint64_t *input)
+{
+  uint64_t t0 = input[0U];
+  uint64_t t1 = input[1U];
+  uint64_t t2 = input[2U];
+  uint64_t t3 = input[3U];
+  uint64_t t4 = input[4U];
+  uint64_t t1_ = t1 + (t0 >> (uint32_t)51U);
+  uint64_t t0_ = t0 & (uint64_t)0x7ffffffffffffU;
+  uint64_t t2_ = t2 + (t1_ >> (uint32_t)51U);
+  uint64_t t1__ = t1_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t3_ = t3 + (t2_ >> (uint32_t)51U);
+  uint64_t t2__ = t2_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t4_ = t4 + (t3_ >> (uint32_t)51U);
+  uint64_t t3__ = t3_ & (uint64_t)0x7ffffffffffffU;
+  input[0U] = t0_;
+  input[1U] = t1__;
+  input[2U] = t2__;
+  input[3U] = t3__;
+  input[4U] = t4_;
+}
+
+static void Hacl_EC_Format_fcontract_first_carry_full(uint64_t *input)
+{
+  Hacl_EC_Format_fcontract_first_carry_pass(input);
+  Hacl_Bignum_Modulo_carry_top(input);
+}
+
+static void Hacl_EC_Format_fcontract_second_carry_pass(uint64_t *input)
+{
+  uint64_t t0 = input[0U];
+  uint64_t t1 = input[1U];
+  uint64_t t2 = input[2U];
+  uint64_t t3 = input[3U];
+  uint64_t t4 = input[4U];
+  uint64_t t1_ = t1 + (t0 >> (uint32_t)51U);
+  uint64_t t0_ = t0 & (uint64_t)0x7ffffffffffffU;
+  uint64_t t2_ = t2 + (t1_ >> (uint32_t)51U);
+  uint64_t t1__ = t1_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t3_ = t3 + (t2_ >> (uint32_t)51U);
+  uint64_t t2__ = t2_ & (uint64_t)0x7ffffffffffffU;
+  uint64_t t4_ = t4 + (t3_ >> (uint32_t)51U);
+  uint64_t t3__ = t3_ & (uint64_t)0x7ffffffffffffU;
+  input[0U] = t0_;
+  input[1U] = t1__;
+  input[2U] = t2__;
+  input[3U] = t3__;
+  input[4U] = t4_;
+}
+
+static void Hacl_EC_Format_fcontract_second_carry_full(uint64_t *input)
+{
+  uint64_t i0;
+  uint64_t i1;
+  uint64_t i0_;
+  uint64_t i1_;
+  Hacl_EC_Format_fcontract_second_carry_pass(input);
+  Hacl_Bignum_Modulo_carry_top(input);
+  i0 = input[0U];
+  i1 = input[1U];
+  i0_ = i0 & (uint64_t)0x7ffffffffffffU;
+  i1_ = i1 + (i0 >> (uint32_t)51U);
+  input[0U] = i0_;
+  input[1U] = i1_;
+}
+
+static void Hacl_EC_Format_fcontract_trim(uint64_t *input)
+{
+  uint64_t a0 = input[0U];
+  uint64_t a1 = input[1U];
+  uint64_t a2 = input[2U];
+  uint64_t a3 = input[3U];
+  uint64_t a4 = input[4U];
+  uint64_t mask0 = FStar_UInt64_gte_mask(a0, (uint64_t)0x7ffffffffffedU);
+  uint64_t mask1 = FStar_UInt64_eq_mask(a1, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask2 = FStar_UInt64_eq_mask(a2, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask3 = FStar_UInt64_eq_mask(a3, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask4 = FStar_UInt64_eq_mask(a4, (uint64_t)0x7ffffffffffffU);
+  uint64_t mask = (((mask0 & mask1) & mask2) & mask3) & mask4;
+  uint64_t a0_ = a0 - ((uint64_t)0x7ffffffffffedU & mask);
+  uint64_t a1_ = a1 - ((uint64_t)0x7ffffffffffffU & mask);
+  uint64_t a2_ = a2 - ((uint64_t)0x7ffffffffffffU & mask);
+  uint64_t a3_ = a3 - ((uint64_t)0x7ffffffffffffU & mask);
+  uint64_t a4_ = a4 - ((uint64_t)0x7ffffffffffffU & mask);
+  input[0U] = a0_;
+  input[1U] = a1_;
+  input[2U] = a2_;
+  input[3U] = a3_;
+  input[4U] = a4_;
+}
+
+static void Hacl_EC_Format_fcontract_store(uint8_t *output, uint64_t *input)
+{
+  uint64_t t0 = input[0U];
+  uint64_t t1 = input[1U];
+  uint64_t t2 = input[2U];
+  uint64_t t3 = input[3U];
+  uint64_t t4 = input[4U];
+  uint64_t o0 = t1 << (uint32_t)51U | t0;
+  uint64_t o1 = t2 << (uint32_t)38U | t1 >> (uint32_t)13U;
+  uint64_t o2 = t3 << (uint32_t)25U | t2 >> (uint32_t)26U;
+  uint64_t o3 = t4 << (uint32_t)12U | t3 >> (uint32_t)39U;
+  uint8_t *b0 = output;
+  uint8_t *b1 = output + (uint32_t)8U;
+  uint8_t *b2 = output + (uint32_t)16U;
+  uint8_t *b3 = output + (uint32_t)24U;
+  store64_le(b0, o0);
+  store64_le(b1, o1);
+  store64_le(b2, o2);
+  store64_le(b3, o3);
+}
+
+static void Hacl_EC_Format_fcontract(uint8_t *output, uint64_t *input)
+{
+  Hacl_EC_Format_fcontract_first_carry_full(input);
+  Hacl_EC_Format_fcontract_second_carry_full(input);
+  Hacl_EC_Format_fcontract_trim(input);
+  Hacl_EC_Format_fcontract_store(output, input);
+}
+
+static void Hacl_EC_Format_scalar_of_point(uint8_t *scalar, uint64_t *point)
+{
+  uint64_t *x = point;
+  uint64_t *z = point + (uint32_t)5U;
+  uint64_t buf[10U] = { 0U };
+  uint64_t *zmone = buf;
+  uint64_t *sc = buf + (uint32_t)5U;
+  Hacl_Bignum_crecip(zmone, z);
+  Hacl_Bignum_fmul(sc, x, zmone);
+  Hacl_EC_Format_fcontract(scalar, sc);
+}
+
+static void
+Hacl_EC_AddAndDouble_fmonty(
+  uint64_t *pp,
+  uint64_t *ppq,
+  uint64_t *p,
+  uint64_t *pq,
+  uint64_t *qmqp
+)
+{
+  uint64_t *qx = qmqp;
+  uint64_t *x2 = pp;
+  uint64_t *z2 = pp + (uint32_t)5U;
+  uint64_t *x3 = ppq;
+  uint64_t *z3 = ppq + (uint32_t)5U;
+  uint64_t *x = p;
+  uint64_t *z = p + (uint32_t)5U;
+  uint64_t *xprime = pq;
+  uint64_t *zprime = pq + (uint32_t)5U;
+  uint64_t buf[40U] = { 0U };
+  uint64_t *origx = buf;
+  uint64_t *origxprime0 = buf + (uint32_t)5U;
+  uint64_t *xxprime0 = buf + (uint32_t)25U;
+  uint64_t *zzprime0 = buf + (uint32_t)30U;
+  uint64_t *origxprime;
+  uint64_t *xx0;
+  uint64_t *zz0;
+  uint64_t *xxprime;
+  uint64_t *zzprime;
+  uint64_t *zzzprime;
+  uint64_t *zzz;
+  uint64_t *xx;
+  uint64_t *zz;
+  uint64_t scalar;
+  memcpy(origx, x, (uint32_t)5U * sizeof x[0U]);
+  Hacl_Bignum_fsum(x, z);
+  Hacl_Bignum_fdifference(z, origx);
+  memcpy(origxprime0, xprime, (uint32_t)5U * sizeof xprime[0U]);
+  Hacl_Bignum_fsum(xprime, zprime);
+  Hacl_Bignum_fdifference(zprime, origxprime0);
+  Hacl_Bignum_fmul(xxprime0, xprime, z);
+  Hacl_Bignum_fmul(zzprime0, x, zprime);
+  origxprime = buf + (uint32_t)5U;
+  xx0 = buf + (uint32_t)15U;
+  zz0 = buf + (uint32_t)20U;
+  xxprime = buf + (uint32_t)25U;
+  zzprime = buf + (uint32_t)30U;
+  zzzprime = buf + (uint32_t)35U;
+  memcpy(origxprime, xxprime, (uint32_t)5U * sizeof xxprime[0U]);
+  Hacl_Bignum_fsum(xxprime, zzprime);
+  Hacl_Bignum_fdifference(zzprime, origxprime);
+  Hacl_Bignum_Fsquare_fsquare_times(x3, xxprime, (uint32_t)1U);
+  Hacl_Bignum_Fsquare_fsquare_times(zzzprime, zzprime, (uint32_t)1U);
+  Hacl_Bignum_fmul(z3, zzzprime, qx);
+  Hacl_Bignum_Fsquare_fsquare_times(xx0, x, (uint32_t)1U);
+  Hacl_Bignum_Fsquare_fsquare_times(zz0, z, (uint32_t)1U);
+  zzz = buf + (uint32_t)10U;
+  xx = buf + (uint32_t)15U;
+  zz = buf + (uint32_t)20U;
+  Hacl_Bignum_fmul(x2, xx, zz);
+  Hacl_Bignum_fdifference(zz, xx);
+  scalar = (uint64_t)121665U;
+  Hacl_Bignum_fscalar(zzz, zz, scalar);
+  Hacl_Bignum_fsum(zzz, xx);
+  Hacl_Bignum_fmul(z2, zzz, zz);
+}
+
+static void
+Hacl_EC_Ladder_SmallLoop_cmult_small_loop_step(
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint8_t byt
+)
+{
+  uint64_t bit0 = (uint64_t)(byt >> (uint32_t)7U);
+  uint64_t bit;
+  Hacl_EC_Point_swap_conditional(nq, nqpq, bit0);
+  Hacl_EC_AddAndDouble_fmonty(nq2, nqpq2, nq, nqpq, q);
+  bit = (uint64_t)(byt >> (uint32_t)7U);
+  Hacl_EC_Point_swap_conditional(nq2, nqpq2, bit);
+}
+
+static void
+Hacl_EC_Ladder_SmallLoop_cmult_small_loop_double_step(
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint8_t byt
+)
+{
+  uint8_t byt1;
+  Hacl_EC_Ladder_SmallLoop_cmult_small_loop_step(nq, nqpq, nq2, nqpq2, q, byt);
+  byt1 = byt << (uint32_t)1U;
+  Hacl_EC_Ladder_SmallLoop_cmult_small_loop_step(nq2, nqpq2, nq, nqpq, q, byt1);
+}
+
+static void
+Hacl_EC_Ladder_SmallLoop_cmult_small_loop(
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint8_t byt,
+  uint32_t i
+)
+{
+  if (!(i == (uint32_t)0U))
+  {
+    uint32_t i_ = i - (uint32_t)1U;
+    uint8_t byt_;
+    Hacl_EC_Ladder_SmallLoop_cmult_small_loop_double_step(nq, nqpq, nq2, nqpq2, q, byt);
+    byt_ = byt << (uint32_t)2U;
+    Hacl_EC_Ladder_SmallLoop_cmult_small_loop(nq, nqpq, nq2, nqpq2, q, byt_, i_);
+  }
+}
+
+static void
+Hacl_EC_Ladder_BigLoop_cmult_big_loop(
+  uint8_t *n1,
+  uint64_t *nq,
+  uint64_t *nqpq,
+  uint64_t *nq2,
+  uint64_t *nqpq2,
+  uint64_t *q,
+  uint32_t i
+)
+{
+  if (!(i == (uint32_t)0U))
+  {
+    uint32_t i1 = i - (uint32_t)1U;
+    uint8_t byte = n1[i1];
+    Hacl_EC_Ladder_SmallLoop_cmult_small_loop(nq, nqpq, nq2, nqpq2, q, byte, (uint32_t)4U);
+    Hacl_EC_Ladder_BigLoop_cmult_big_loop(n1, nq, nqpq, nq2, nqpq2, q, i1);
+  }
+}
+
+static void Hacl_EC_Ladder_cmult(uint64_t *result, uint8_t *n1, uint64_t *q)
+{
+  uint64_t point_buf[40U] = { 0U };
+  uint64_t *nq = point_buf;
+  uint64_t *nqpq = point_buf + (uint32_t)10U;
+  uint64_t *nq2 = point_buf + (uint32_t)20U;
+  uint64_t *nqpq2 = point_buf + (uint32_t)30U;
+  Hacl_EC_Point_copy(nqpq, q);
+  nq[0U] = (uint64_t)1U;
+  Hacl_EC_Ladder_BigLoop_cmult_big_loop(n1, nq, nqpq, nq2, nqpq2, q, (uint32_t)32U);
+  Hacl_EC_Point_copy(result, nq);
+}
+
+void Hacl_Curve25519_crypto_scalarmult(uint8_t *mypublic, uint8_t *secret, uint8_t *basepoint)
+{
+  uint64_t buf0[10U] = { 0U };
+  uint64_t *x0 = buf0;
+  uint64_t *z = buf0 + (uint32_t)5U;
+  uint64_t *q;
+  Hacl_EC_Format_fexpand(x0, basepoint);
+  z[0U] = (uint64_t)1U;
+  q = buf0;
+  {
+    uint8_t e[32U] = { 0U };
+    uint8_t e0;
+    uint8_t e31;
+    uint8_t e01;
+    uint8_t e311;
+    uint8_t e312;
+    uint8_t *scalar;
+    memcpy(e, secret, (uint32_t)32U * sizeof secret[0U]);
+    e0 = e[0U];
+    e31 = e[31U];
+    e01 = e0 & (uint8_t)248U;
+    e311 = e31 & (uint8_t)127U;
+    e312 = e311 | (uint8_t)64U;
+    e[0U] = e01;
+    e[31U] = e312;
+    scalar = e;
+    {
+      uint64_t buf[15U] = { 0U };
+      uint64_t *nq = buf;
+      uint64_t *x = nq;
+      x[0U] = (uint64_t)1U;
+      Hacl_EC_Ladder_cmult(nq, scalar, q);
+      Hacl_EC_Format_scalar_of_point(mypublic, nq);
+    }
+  }
+}
+

mbedtls.mod/mbedtls/3rdparty/everest/library/x25519.c

@@ -0,0 +1,186 @@
+/*
+ *  ECDH with curve-optimized implementation multiplexing
+ *
+ *  Copyright 2016-2018 INRIA and Microsoft Corporation
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#include "common.h"
+
+#if defined(MBEDTLS_ECDH_C) && defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
+
+#include <mbedtls/ecdh.h>
+
+#if !(defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16))
+#define KRML_VERIFIED_UINT128
+#endif
+
+#include <Hacl_Curve25519.h>
+#include <mbedtls/platform_util.h>
+
+#include "x25519.h"
+
+#include <string.h>
+
+/*
+ * Initialize context
+ */
+void mbedtls_x25519_init( mbedtls_x25519_context *ctx )
+{
+    mbedtls_platform_zeroize( ctx, sizeof( mbedtls_x25519_context ) );
+}
+
+/*
+ * Free context
+ */
+void mbedtls_x25519_free( mbedtls_x25519_context *ctx )
+{
+    if( ctx == NULL )
+        return;
+
+    mbedtls_platform_zeroize( ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES );
+    mbedtls_platform_zeroize( ctx->peer_point, MBEDTLS_X25519_KEY_SIZE_BYTES );
+}
+
+int mbedtls_x25519_make_params( mbedtls_x25519_context *ctx, size_t *olen,
+                        unsigned char *buf, size_t blen,
+                        int( *f_rng )(void *, unsigned char *, size_t),
+                        void *p_rng )
+{
+    int ret = 0;
+
+    uint8_t base[MBEDTLS_X25519_KEY_SIZE_BYTES] = {0};
+
+    if( ( ret = f_rng( p_rng, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES ) ) != 0 )
+        return ret;
+
+    *olen = MBEDTLS_X25519_KEY_SIZE_BYTES + 4;
+    if( blen < *olen )
+        return( MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL );
+
+    *buf++ = MBEDTLS_ECP_TLS_NAMED_CURVE;
+    *buf++ = MBEDTLS_ECP_TLS_CURVE25519 >> 8;
+    *buf++ = MBEDTLS_ECP_TLS_CURVE25519 & 0xFF;
+    *buf++ = MBEDTLS_X25519_KEY_SIZE_BYTES;
+
+    base[0] = 9;
+    Hacl_Curve25519_crypto_scalarmult( buf, ctx->our_secret, base );
+
+    base[0] = 0;
+    if( memcmp( buf, base, MBEDTLS_X25519_KEY_SIZE_BYTES) == 0 )
+        return MBEDTLS_ERR_ECP_RANDOM_FAILED;
+
+    return( 0 );
+}
+
+int mbedtls_x25519_read_params( mbedtls_x25519_context *ctx,
+                        const unsigned char **buf, const unsigned char *end )
+{
+    if( end - *buf < MBEDTLS_X25519_KEY_SIZE_BYTES + 1 )
+        return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
+
+    if( ( *(*buf)++ != MBEDTLS_X25519_KEY_SIZE_BYTES ) )
+        return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
+
+    memcpy( ctx->peer_point, *buf, MBEDTLS_X25519_KEY_SIZE_BYTES );
+    *buf += MBEDTLS_X25519_KEY_SIZE_BYTES;
+    return( 0 );
+}
+
+int mbedtls_x25519_get_params( mbedtls_x25519_context *ctx, const mbedtls_ecp_keypair *key,
+                               mbedtls_x25519_ecdh_side side )
+{
+    size_t olen = 0;
+
+    switch( side ) {
+    case MBEDTLS_X25519_ECDH_THEIRS:
+        return mbedtls_ecp_point_write_binary( &key->grp, &key->Q, MBEDTLS_ECP_PF_COMPRESSED, &olen, ctx->peer_point, MBEDTLS_X25519_KEY_SIZE_BYTES );
+    case MBEDTLS_X25519_ECDH_OURS:
+        return mbedtls_mpi_write_binary_le( &key->d, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES );
+    default:
+        return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
+    }
+}
+
+int mbedtls_x25519_calc_secret( mbedtls_x25519_context *ctx, size_t *olen,
+                        unsigned char *buf, size_t blen,
+                        int( *f_rng )(void *, unsigned char *, size_t),
+                        void *p_rng )
+{
+    /* f_rng and p_rng are not used here because this implementation does not
+       need blinding since it has constant trace. */
+    (( void )f_rng);
+    (( void )p_rng);
+
+    *olen = MBEDTLS_X25519_KEY_SIZE_BYTES;
+
+    if( blen < *olen )
+        return( MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL );
+
+    Hacl_Curve25519_crypto_scalarmult( buf, ctx->our_secret, ctx->peer_point);
+
+    /* Wipe the DH secret and don't let the peer chose a small subgroup point */
+    mbedtls_platform_zeroize( ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES );
+
+    if( memcmp( buf, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES) == 0 )
+        return MBEDTLS_ERR_ECP_RANDOM_FAILED;
+
+    return( 0 );
+}
+
+int mbedtls_x25519_make_public( mbedtls_x25519_context *ctx, size_t *olen,
+                        unsigned char *buf, size_t blen,
+                        int( *f_rng )(void *, unsigned char *, size_t),
+                        void *p_rng )
+{
+    int ret = 0;
+    unsigned char base[MBEDTLS_X25519_KEY_SIZE_BYTES] = { 0 };
+
+    if( ctx == NULL )
+        return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
+
+    if( ( ret = f_rng( p_rng, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES ) ) != 0 )
+        return ret;
+
+    *olen = MBEDTLS_X25519_KEY_SIZE_BYTES + 1;
+    if( blen < *olen )
+        return(MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL);
+    *buf++ = MBEDTLS_X25519_KEY_SIZE_BYTES;
+
+    base[0] = 9;
+    Hacl_Curve25519_crypto_scalarmult( buf, ctx->our_secret, base );
+
+    base[0] = 0;
+    if( memcmp( buf, base, MBEDTLS_X25519_KEY_SIZE_BYTES ) == 0 )
+        return MBEDTLS_ERR_ECP_RANDOM_FAILED;
+
+    return( ret );
+}
+
+int mbedtls_x25519_read_public( mbedtls_x25519_context *ctx,
+                        const unsigned char *buf, size_t blen )
+{
+    if( blen < MBEDTLS_X25519_KEY_SIZE_BYTES + 1 )
+        return(MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL);
+    if( (*buf++ != MBEDTLS_X25519_KEY_SIZE_BYTES) )
+        return(MBEDTLS_ERR_ECP_BAD_INPUT_DATA);
+    memcpy( ctx->peer_point, buf, MBEDTLS_X25519_KEY_SIZE_BYTES );
+    return( 0 );
+}
+
+
+#endif /* MBEDTLS_ECDH_C && MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED */

mbedtls.mod/mbedtls/BRANCHES.md

@@ -0,0 +1,78 @@
+# Maintained branches
+
+At any point in time, we have a number of maintained branches consisting of:
+
+- The [`master`](https://github.com/ARMmbed/mbedtls/tree/master) branch:
+  this always contains the latest release, including all publicly available
+  security fixes.
+- The [`development`](https://github.com/ARMmbed/mbedtls/tree/development) branch:
+  this is where the current major version of Mbed TLS (version 3.x) is being
+  prepared. It has API changes that make it incompatible with Mbed TLS 2.x,
+  as well as all the new features and bug fixes and security fixes.
+- The [`development_2.x`](https://github.com/ARMmbed/mbedtls/tree/development_2.x) branch:
+  this branch retains the API of Mbed TLS 2.x, and has a subset of the
+  features added after Mbed TLS 2.26.0 and bug fixes and security fixes.
+- One or more long-time support (LTS) branches:
+  these only get bug fixes and security fixes.
+
+We use [Semantic Versioning](https://semver.org/). In particular, we maintain
+API compatibility in the `master` branch across minor version changes (e.g.
+the API of 3.(x+1) is backward compatible with 3.x). We only break API
+compatibility on major version changes (e.g. from 3.x to 4.0). We also maintain
+ABI compatibility within LTS branches; see the next section for details.
+
+## Backwards Compatibility
+
+We maintain API compatibility in released versions of Mbed TLS. If you have
+code that's working and secure with Mbed TLS x.y.z and does not rely on
+undocumented features, then you should be able to re-compile it without
+modification with any later release x.y'.z' with the same major version
+number, and your code will still build, be secure, and work.
+
+Note that new releases of Mbed TLS may extend the API. Here are some
+examples of changes that are common in minor releases of Mbed TLS, and are
+not considered API compatibility breaks:
+
+* Adding or reordering fields in a structure or union.
+* Removing a field from a structure, unless the field is documented as public.
+* Adding items to an enum.
+* Returning an error code that was not previously documented for a function
+  when a new error condition arises.
+* Changing which error code is returned in a case where multiple error
+  conditions apply.
+* Changing the behavior of a function from failing to succeeding, when the
+  change is a reasonable extension of the current behavior, i.e. the
+  addition of a new feature.
+
+There are rare exceptions where we break API compatibility: code that was
+relying on something that became insecure in the meantime (for example,
+crypto that was found to be weak) may need to be changed. In case security
+comes in conflict with backwards compatibility, we will put security first,
+but always attempt to provide a compatibility option.
+
+## Long-time support branches
+
+For the LTS branches, additionally we try very hard to also maintain ABI
+compatibility (same definition as API except with re-linking instead of
+re-compiling) and to avoid any increase in code size or RAM usage, or in the
+minimum version of tools needed to build the code. The only exception, as
+before, is in case those goals would conflict with fixing a security issue, we
+will put security first but provide a compatibility option. (So far we never
+had to break ABI compatibility in an LTS branch, but we occasionally had to
+increase code size for a security fix.)
+
+For contributors, see the [Backwards Compatibility section of
+CONTRIBUTING](CONTRIBUTING.md#backwards-compatibility).
+
+## Current Branches
+
+The following branches are currently maintained:
+
+- [master](https://github.com/ARMmbed/mbedtls/tree/master)
+- [`development`](https://github.com/ARMmbed/mbedtls/)
+- [`development_2.x`](https://github.com/ARMmbed/mbedtls/tree/development_2.x)
+- [`mbedtls-2.16`](https://github.com/ARMmbed/mbedtls/tree/mbedtls-2.16)
+ maintained until at least the end of 2021, see
+  <https://tls.mbed.org/tech-updates/blog/announcing-lts-branch-mbedtls-2.16>
+
+Users are urged to always use the latest version of a maintained branch.

mbedtls.mod/mbedtls/BUGS.md

@@ -0,0 +1,20 @@
+## Known issues
+
+Known issues in Mbed TLS are [tracked on GitHub](https://github.com/ARMmbed/mbedtls/issues).
+
+## Reporting a bug
+
+If you think you've found a bug in Mbed TLS, please follow these steps:
+
+1. Make sure you're using the latest version of a
+   [maintained branch](BRANCHES.md): `master`, `development`,
+   or a long-time support branch.
+2. Check [GitHub](https://github.com/ARMmbed/mbedtls/issues) to see if
+   your issue has already been reported. If not, …
+3. If the issue is a security risk (for example: buffer overflow,
+   data leak), please report it confidentially as described in
+   [`SECURITY.md`](SECURITY.md). If not, …
+4. Please [create an issue on on GitHub](https://github.com/ARMmbed/mbedtls/issues).
+
+Please do not use GitHub for support questions. If you want to know
+how to do something with Mbed TLS, please see [`SUPPORT.md`](SUPPORT.md) for available documentation and support channels.

mbedtls.mod/mbedtls/CMakeLists.txt

@@ -0,0 +1,360 @@
+#
+# CMake build system design considerations:
+#
+# - Include directories:
+#   + Do not define include directories globally using the include_directories
+#     command but rather at the target level using the
+#     target_include_directories command. That way, it is easier to guarantee
+#     that targets are built using the proper list of include directories.
+#   + Use the PUBLIC and PRIVATE keywords to specifiy the scope of include
+#     directories. That way, a target linking to a library (using the
+#     target_link_librairies command) inherits from the library PUBLIC include
+#     directories and not from the PRIVATE ones.
+# - MBEDTLS_TARGET_PREFIX: CMake targets are designed to be alterable by calling
+#   CMake in order to avoid target name clashes, via the use of
+#   MBEDTLS_TARGET_PREFIX. The value of this variable is prefixed to the
+#   mbedtls, mbedx509, mbedcrypto and apidoc targets.
+#
+
+# We specify a minimum requirement of 3.10.2, but for now use 3.5.1 here
+# until our infrastructure catches up.
+cmake_minimum_required(VERSION 3.5.1)
+
+include(CMakePackageConfigHelpers)
+
+# https://cmake.org/cmake/help/latest/policy/CMP0011.html
+# Setting this policy is required in CMake >= 3.18.0, otherwise a warning is generated. The OLD
+# policy setting is deprecated, and will be removed in future versions.
+cmake_policy(SET CMP0011 NEW)
+# https://cmake.org/cmake/help/latest/policy/CMP0012.html
+# Setting the CMP0012 policy to NEW is required for FindPython3 to work with CMake 3.18.2
+# (there is a bug in this particular version), otherwise, setting the CMP0012 policy is required
+# for CMake versions >= 3.18.3 otherwise a deprecated warning is generated. The OLD policy setting
+# is deprecated and will be removed in future versions.
+cmake_policy(SET CMP0012 NEW)
+
+if(TEST_CPP)
+    project("mbed TLS" C CXX)
+else()
+    project("mbed TLS" C)
+endif()
+
+# Set the project root directory.
+set(MBEDTLS_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+
+option(ENABLE_PROGRAMS "Build mbed TLS programs." ON)
+
+option(UNSAFE_BUILD "Allow unsafe builds. These builds ARE NOT SECURE." OFF)
+option(MBEDTLS_FATAL_WARNINGS "Compiler warnings treated as errors" ON)
+if(WIN32)
+    option(GEN_FILES "Generate the auto-generated files as needed" OFF)
+else()
+    option(GEN_FILES "Generate the auto-generated files as needed" ON)
+endif()
+
+string(REGEX MATCH "Clang" CMAKE_COMPILER_IS_CLANG "${CMAKE_C_COMPILER_ID}")
+string(REGEX MATCH "GNU" CMAKE_COMPILER_IS_GNU "${CMAKE_C_COMPILER_ID}")
+string(REGEX MATCH "IAR" CMAKE_COMPILER_IS_IAR "${CMAKE_C_COMPILER_ID}")
+string(REGEX MATCH "MSVC" CMAKE_COMPILER_IS_MSVC "${CMAKE_C_COMPILER_ID}")
+
+# the test suites currently have compile errors with MSVC
+if(CMAKE_COMPILER_IS_MSVC)
+    option(ENABLE_TESTING "Build mbed TLS tests." OFF)
+else()
+    option(ENABLE_TESTING "Build mbed TLS tests." ON)
+endif()
+
+# Warning string - created as a list for compatibility with CMake 2.8
+set(CTR_DRBG_128_BIT_KEY_WARN_L1 "****  WARNING!  MBEDTLS_CTR_DRBG_USE_128_BIT_KEY defined!\n")
+set(CTR_DRBG_128_BIT_KEY_WARN_L2 "****  Using 128-bit keys for CTR_DRBG limits the security of generated\n")
+set(CTR_DRBG_128_BIT_KEY_WARN_L3 "****  keys and operations that use random values generated to 128-bit security\n")
+
+set(CTR_DRBG_128_BIT_KEY_WARNING "${WARNING_BORDER}"
+                         "${CTR_DRBG_128_BIT_KEY_WARN_L1}"
+                         "${CTR_DRBG_128_BIT_KEY_WARN_L2}"
+                         "${CTR_DRBG_128_BIT_KEY_WARN_L3}"
+                         "${WARNING_BORDER}")
+
+# Python 3 is only needed here to check for configuration warnings.
+if(NOT CMAKE_VERSION VERSION_LESS 3.15.0)
+    set(Python3_FIND_STRATEGY LOCATION)
+    find_package(Python3 COMPONENTS Interpreter)
+    if(Python3_Interpreter_FOUND)
+        set(MBEDTLS_PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
+    endif()
+else()
+    find_package(PythonInterp 3)
+    if(PYTHONINTERP_FOUND)
+        set(MBEDTLS_PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE})
+    endif()
+endif()
+if(MBEDTLS_PYTHON_EXECUTABLE)
+
+    # If 128-bit keys are configured for CTR_DRBG, display an appropriate warning
+    execute_process(COMMAND ${MBEDTLS_PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/scripts/config.py -f ${CMAKE_CURRENT_SOURCE_DIR}/include/mbedtls/mbedtls_config.h get MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
+                        RESULT_VARIABLE result)
+    if(${result} EQUAL 0)
+        message(WARNING ${CTR_DRBG_128_BIT_KEY_WARNING})
+    endif()
+
+endif()
+
+# If this is the root project add longer list of available CMAKE_BUILD_TYPE values
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+    set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE}
+        CACHE STRING "Choose the type of build: None Debug Release Coverage ASan ASanDbg MemSan MemSanDbg Check CheckFull"
+        FORCE)
+endif()
+
+# Create a symbolic link from ${base_name} in the binary directory
+# to the corresponding path in the source directory.
+function(link_to_source base_name)
+    # Get OS dependent path to use in `execute_process`
+    if (CMAKE_HOST_WIN32)
+        #mklink is an internal command of cmd.exe it can only work with \
+        string(REPLACE "/" "\\" link "${CMAKE_CURRENT_BINARY_DIR}/${base_name}")
+        string(REPLACE "/" "\\" target "${CMAKE_CURRENT_SOURCE_DIR}/${base_name}")
+    else()
+        set(link "${CMAKE_CURRENT_BINARY_DIR}/${base_name}")
+        set(target "${CMAKE_CURRENT_SOURCE_DIR}/${base_name}")
+    endif()
+
+    if (NOT EXISTS ${link})
+        if (CMAKE_HOST_UNIX)
+            set(command ln -s ${target} ${link})
+        else()
+            if (IS_DIRECTORY ${target})
+                set(command cmd.exe /c mklink /j ${link} ${target})
+            else()
+                set(command cmd.exe /c mklink /h ${link} ${target})
+            endif()
+        endif()
+
+        execute_process(COMMAND ${command}
+            RESULT_VARIABLE result
+            ERROR_VARIABLE output)
+
+        if (NOT ${result} EQUAL 0)
+            message(FATAL_ERROR "Could not create symbolic link for: ${target} --> ${output}")
+        endif()
+    endif()
+endfunction(link_to_source)
+
+# Get the filename without the final extension (i.e. convert "a.b.c" to "a.b")
+function(get_name_without_last_ext dest_var full_name)
+    # Split into a list on '.' (but a cmake list is just a ';'-separated string)
+    string(REPLACE "." ";" ext_parts "${full_name}")
+    # Remove the last item if there are more than one
+    list(LENGTH ext_parts ext_parts_len)
+    if (${ext_parts_len} GREATER "1")
+        math(EXPR ext_parts_last_item "${ext_parts_len} - 1")
+        list(REMOVE_AT ext_parts ${ext_parts_last_item})
+    endif()
+    # Convert back to a string by replacing separators with '.'
+    string(REPLACE ";" "." no_ext_name "${ext_parts}")
+    # Copy into the desired variable
+    set(${dest_var} ${no_ext_name} PARENT_SCOPE)
+endfunction(get_name_without_last_ext)
+
+string(REGEX MATCH "Clang" CMAKE_COMPILER_IS_CLANG "${CMAKE_C_COMPILER_ID}")
+
+include(CheckCCompilerFlag)
+
+if(CMAKE_COMPILER_IS_GNU)
+    # some warnings we want are not available with old GCC versions
+    # note: starting with CMake 2.8 we could use CMAKE_C_COMPILER_VERSION
+    execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
+                    OUTPUT_VARIABLE GCC_VERSION)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wwrite-strings")
+    if (GCC_VERSION VERSION_GREATER 3.0 OR GCC_VERSION VERSION_EQUAL 3.0)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wformat=2 -Wno-format-nonliteral")
+    endif()
+    if (GCC_VERSION VERSION_GREATER 4.3 OR GCC_VERSION VERSION_EQUAL 4.3)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wvla")
+    endif()
+    if (GCC_VERSION VERSION_GREATER 4.5 OR GCC_VERSION VERSION_EQUAL 4.5)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wlogical-op")
+    endif()
+    if (GCC_VERSION VERSION_GREATER 4.8 OR GCC_VERSION VERSION_EQUAL 4.8)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wshadow")
+    endif()
+    if (GCC_VERSION VERSION_GREATER 5.0)
+        CHECK_C_COMPILER_FLAG("-Wformat-signedness" C_COMPILER_SUPPORTS_WFORMAT_SIGNEDNESS)
+        if(C_COMPILER_SUPPORTS_WFORMAT_SIGNEDNESS)
+            set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wformat-signedness")
+        endif()
+    endif()
+    if (GCC_VERSION VERSION_GREATER 7.0 OR GCC_VERSION VERSION_EQUAL 7.0)
+      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wformat-overflow=2 -Wformat-truncation")
+    endif()
+    set(CMAKE_C_FLAGS_RELEASE     "-O2")
+    set(CMAKE_C_FLAGS_DEBUG       "-O0 -g3")
+    set(CMAKE_C_FLAGS_COVERAGE    "-O0 -g3 --coverage")
+    set(CMAKE_C_FLAGS_ASAN        "-fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=all -O3")
+    set(CMAKE_C_FLAGS_ASANDBG     "-fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=all -O1 -g3 -fno-omit-frame-pointer -fno-optimize-sibling-calls")
+    set(CMAKE_C_FLAGS_CHECK       "-Os")
+    set(CMAKE_C_FLAGS_CHECKFULL   "${CMAKE_C_FLAGS_CHECK} -Wcast-qual")
+endif(CMAKE_COMPILER_IS_GNU)
+
+if(CMAKE_COMPILER_IS_CLANG)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wwrite-strings -Wpointer-arith -Wimplicit-fallthrough -Wshadow -Wvla -Wformat=2 -Wno-format-nonliteral")
+    set(CMAKE_C_FLAGS_RELEASE     "-O2")
+    set(CMAKE_C_FLAGS_DEBUG       "-O0 -g3")
+    set(CMAKE_C_FLAGS_COVERAGE    "-O0 -g3 --coverage")
+    set(CMAKE_C_FLAGS_ASAN        "-fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=all -O3")
+    set(CMAKE_C_FLAGS_ASANDBG     "-fsanitize=address -fno-common -fsanitize=undefined -fno-sanitize-recover=all -O1 -g3 -fno-omit-frame-pointer -fno-optimize-sibling-calls")
+    set(CMAKE_C_FLAGS_MEMSAN      "-fsanitize=memory -O3")
+    set(CMAKE_C_FLAGS_MEMSANDBG   "-fsanitize=memory -O1 -g3 -fno-omit-frame-pointer -fno-optimize-sibling-calls -fsanitize-memory-track-origins=2")
+    set(CMAKE_C_FLAGS_CHECK       "-Os")
+endif(CMAKE_COMPILER_IS_CLANG)
+
+if(CMAKE_COMPILER_IS_IAR)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --warn_about_c_style_casts --warnings_are_errors -Ohz")
+endif(CMAKE_COMPILER_IS_IAR)
+
+if(CMAKE_COMPILER_IS_MSVC)
+    # Strictest warnings
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W3")
+endif(CMAKE_COMPILER_IS_MSVC)
+
+if(MBEDTLS_FATAL_WARNINGS)
+    if(CMAKE_COMPILER_IS_MSVC)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /WX")
+    endif(CMAKE_COMPILER_IS_MSVC)
+
+    if(CMAKE_COMPILER_IS_CLANG OR CMAKE_COMPILER_IS_GNU)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")
+        if(UNSAFE_BUILD)
+            set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-error=cpp")
+            set(CMAKE_C_FLAGS_ASAN "${CMAKE_C_FLAGS_ASAN} -Wno-error=cpp")
+            set(CMAKE_C_FLAGS_ASANDBG "${CMAKE_C_FLAGS_ASANDBG} -Wno-error=cpp")
+        endif(UNSAFE_BUILD)
+    endif(CMAKE_COMPILER_IS_CLANG OR CMAKE_COMPILER_IS_GNU)
+endif(MBEDTLS_FATAL_WARNINGS)
+
+if(CMAKE_BUILD_TYPE STREQUAL "Coverage")
+    if(CMAKE_COMPILER_IS_GNU OR CMAKE_COMPILER_IS_CLANG)
+        set(CMAKE_SHARED_LINKER_FLAGS "--coverage")
+    endif(CMAKE_COMPILER_IS_GNU OR CMAKE_COMPILER_IS_CLANG)
+endif(CMAKE_BUILD_TYPE STREQUAL "Coverage")
+
+if(LIB_INSTALL_DIR)
+else()
+    set(LIB_INSTALL_DIR lib)
+endif()
+
+add_subdirectory(include)
+
+add_subdirectory(3rdparty)
+
+add_subdirectory(library)
+
+#
+# The C files in tests/src directory contain test code shared among test suites
+# and programs. This shared test code is compiled and linked to test suites and
+# programs objects as a set of compiled objects. The compiled objects are NOT
+# built into a library that the test suite and program objects would link
+# against as they link against the mbedcrypto, mbedx509 and mbedtls libraries.
+# The reason is that such library is expected to have mutual dependencies with
+# the aforementioned libraries and that there is as of today no portable way of
+# handling such dependencies (only toolchain specific solutions).
+#
+# Thus the below definition of the `mbedtls_test` CMake library of objects
+# target. This library of objects is used by tests and programs CMake files
+# to define the test executables.
+#
+if(ENABLE_TESTING OR ENABLE_PROGRAMS)
+    file(GLOB MBEDTLS_TEST_FILES ${CMAKE_CURRENT_SOURCE_DIR}/tests/src/*.c ${CMAKE_CURRENT_SOURCE_DIR}/tests/src/drivers/*.c)
+    add_library(mbedtls_test OBJECT ${MBEDTLS_TEST_FILES})
+    target_include_directories(mbedtls_test
+        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/tests/include
+        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/library)
+endif()
+
+if(ENABLE_PROGRAMS)
+    add_subdirectory(programs)
+endif()
+
+ADD_CUSTOM_TARGET(${MBEDTLS_TARGET_PREFIX}apidoc
+    COMMAND doxygen mbedtls.doxyfile
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/doxygen)
+
+if(ENABLE_TESTING)
+    enable_testing()
+
+    add_subdirectory(tests)
+
+    # additional convenience targets for Unix only
+    if(UNIX)
+
+        ADD_CUSTOM_TARGET(covtest
+            COMMAND make test
+            COMMAND programs/test/selftest
+            COMMAND tests/compat.sh
+            COMMAND tests/ssl-opt.sh
+        )
+
+        ADD_CUSTOM_TARGET(lcov
+            COMMAND rm -rf Coverage
+            COMMAND lcov --capture --initial --directory library/CMakeFiles/mbedtls.dir -o files.info
+            COMMAND lcov --capture --directory library/CMakeFiles/mbedtls.dir -o tests.info
+            COMMAND lcov --add-tracefile files.info --add-tracefile tests.info -o all.info
+            COMMAND lcov --remove all.info -o final.info '*.h'
+            COMMAND gendesc tests/Descriptions.txt -o descriptions
+            COMMAND genhtml --title "mbed TLS" --description-file descriptions --keep-descriptions --legend --no-branch-coverage -o Coverage final.info
+            COMMAND rm -f files.info tests.info all.info final.info descriptions
+        )
+
+        ADD_CUSTOM_TARGET(memcheck
+            COMMAND sed -i.bak s+/usr/bin/valgrind+`which valgrind`+ DartConfiguration.tcl
+            COMMAND ctest -O memcheck.log -D ExperimentalMemCheck
+            COMMAND tail -n1 memcheck.log | grep 'Memory checking results:' > /dev/null
+            COMMAND rm -f memcheck.log
+            COMMAND mv DartConfiguration.tcl.bak DartConfiguration.tcl
+        )
+    endif(UNIX)
+
+    # Make scripts needed for testing available in an out-of-source build.
+    if (NOT ${CMAKE_CURRENT_BINARY_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
+        link_to_source(scripts)
+        # Copy (don't link) DartConfiguration.tcl, needed for memcheck, to
+        # keep things simple with the sed commands in the memcheck target.
+        configure_file(${CMAKE_CURRENT_SOURCE_DIR}/DartConfiguration.tcl
+                    ${CMAKE_CURRENT_BINARY_DIR}/DartConfiguration.tcl COPYONLY)
+    endif()
+endif()
+
+configure_package_config_file(
+    "cmake/MbedTLSConfig.cmake.in"
+    "cmake/MbedTLSConfig.cmake"
+        INSTALL_DESTINATION "cmake")
+
+write_basic_package_version_file(
+    "cmake/MbedTLSConfigVersion.cmake"
+        COMPATIBILITY SameMajorVersion
+        VERSION 3.0.0)
+
+install(
+    FILES "${CMAKE_CURRENT_BINARY_DIR}/cmake/MbedTLSConfig.cmake"
+          "${CMAKE_CURRENT_BINARY_DIR}/cmake/MbedTLSConfigVersion.cmake"
+    DESTINATION "cmake")
+
+export(
+    EXPORT MbedTLSTargets
+    NAMESPACE MbedTLS::
+    FILE "cmake/MbedTLSTargets.cmake")
+
+install(
+    EXPORT MbedTLSTargets
+    NAMESPACE MbedTLS::
+    DESTINATION "cmake"
+    FILE "MbedTLSTargets.cmake")
+
+if(CMAKE_VERSION VERSION_GREATER 3.15 OR CMAKE_VERSION VERSION_EQUAL 3.15)
+    # Do not export the package by default
+    cmake_policy(SET CMP0090 NEW)
+
+    # Make this package visible to the system
+    export(PACKAGE MbedTLS)
+endif()

mbedtls.mod/mbedtls/CONTRIBUTING.md

@@ -0,0 +1,85 @@
+Contributing
+============
+We gratefully accept bug reports and contributions from the community. There are some requirements we need to fulfill in order to be able to integrate contributions:
+
+ - As with any open source project, contributions will be reviewed by the project team and community and may need some modifications to be accepted.
+ - The contribution should not break API or ABI, unless there is a real justification for that. If there is an API change, the contribution, if accepted, will be merged only when there will be a major release.
+
+Coding Standards
+----------------
+- We would ask that contributions conform to [our coding standards](https://tls.mbed.org/kb/development/mbedtls-coding-standards), and that contributions are fully tested before submission, as mentioned in the [Tests](#tests) and [Continuous Integration](#continuous-integration-tests) sections.
+- The code should be written in a clean and readable style.
+- The code should be written in a portable generic way, that will benefit the whole community, and not only your own needs.
+- The code should be secure, and will be reviewed from a security point of view as well.
+
+Making a Contribution
+---------------------
+1. [Check for open issues](https://github.com/ARMmbed/mbedtls/issues) or [start a discussion](https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls) around a feature idea or a bug.
+1. Fork the [Mbed TLS repository on GitHub](https://github.com/ARMmbed/mbedtls) to start making your changes. As a general rule, you should use the ["development" branch](https://github.com/ARMmbed/mbedtls/tree/development) as a basis.
+1. Write a test which shows that the bug was fixed or that the feature works as expected.
+1. Send a pull request (PR) and work with us until it gets merged and published. Contributions may need some modifications, so a few rounds of review and fixing may be necessary. We will include your name in the ChangeLog :)
+1. For quick merging, the contribution should be short, and concentrated on a single feature or topic. The larger the contribution is, the longer it would take to review it and merge it.
+1. All new files should include the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) standard license header where possible.
+1. Ensure that each commit has at least one `Signed-off-by:` line from the committer. If anyone else contributes to the commit, they should also add their own `Signed-off-by:` line. By adding this line, contributor(s) certify that the contribution is made under the terms of the [Developer Certificate of Origin](dco.txt). The contribution licensing is described in the [License section of the README](README.md#License).
+
+Backwards Compatibility
+-----------------------
+
+The project aims to minimise the impact on users upgrading to newer versions of the library and it should not be necessary for a user to make any changes to their own code to work with a newer version of the library. Unless the user has made an active decision to use newer features, a newer generation of the library or a change has been necessary due to a security issue or other significant software defect, no modifications to their own code should be necessary. To achieve this, API compatibility is maintained between different versions of Mbed TLS on the main development branch and in LTS (Long Term Support) branches, as described in [BRANCHES.md](BRANCHES.md).
+
+To minimise such disruption to users, where a change to the interface is required, all changes to the ABI or API, even on the main development branch where new features are added, need to be justifiable by either being a significant enhancement, new feature or bug fix which is best resolved by an interface change.
+
+Where changes to an existing interface are necessary, functions in the public interface which need to be changed, are marked as 'deprecated'. This is done with the preprocessor symbols `MBEDTLS_DEPRECATED_WARNING` and `MBEDTLS_DEPRECATED_REMOVED`. Then, a new function with a new name but similar if not identical behaviour to the original function containing the necessary changes should be created alongside the existing deprecated function.
+
+When a build is made with the deprecation preprocessor symbols defined, a compiler warning will be generated to warn a user that the function will be removed at some point in the future, notifying users that they should change from the older deprecated function to the newer function at their own convenience.
+
+Therefore, no changes are permitted to the definition of functions in the public interface which will change the API. Instead the interface can only be changed by its extension. As described above, if a function needs to be changed, a new function needs to be created alongside it, with a new name, and whatever change is necessary, such as a new parameter or the addition of a return value.
+
+Periodically, the library will remove deprecated functions from the library which will be a breaking change in the API, but such changes will be made only in a planned, structured way that gives sufficient notice to users of the library.
+
+Long Term Support Branches
+--------------------------
+Mbed TLS maintains several LTS (Long Term Support) branches, which are maintained continuously for a given period. The LTS branches are provided to allow users of the library to have a maintained, stable version of the library which contains only security fixes and fixes for other defects, without encountering additional features or API extensions which may introduce issues or change the code size or RAM usage, which can be significant considerations on some platforms. To allow users to take advantage of the LTS branches, these branches maintain backwards compatibility for both the public API and ABI.
+
+When backporting to these branches please observe the following rules:
+
+1. Any change to the library which changes the API or ABI cannot be backported.
+1. All bug fixes that correct a defect that is also present in an LTS branch must be backported to that LTS branch. If a bug fix introduces a change to the API such as a new function, the fix should be reworked to avoid the API change. API changes without very strong justification are unlikely to be accepted.
+1. If a contribution is a new feature or enhancement, no backporting is required. Exceptions to this may be additional test cases or quality improvements such as changes to build or test scripts.
+
+It would be highly appreciated if contributions are backported to LTS branches in addition to the [development branch](https://github.com/ARMmbed/mbedtls/tree/development) by contributors.
+
+The list of maintained branches can be found in the [Current Branches section
+of BRANCHES.md](BRANCHES.md#current-branches).
+
+The only currently maintained LTS branch is:
+1. [mbedtls-2.16](https://github.com/ARMmbed/mbedtls/tree/mbedtls-2.16)
+
+
+Tests
+-----
+As mentioned, tests that show the correctness of the feature or bug fix should be added to the pull request, if no such tests exist.
+
+Mbed TLS includes a comprehensive set of test suites in the `tests/` directory that are dynamically generated to produce the actual test source files (e.g. `test_suite_mpi.c`). These files are generated from a `function file` (e.g. `suites/test_suite_mpi.function`) and a `data file` (e.g. `suites/test_suite_mpi.data`). The function file contains the test functions. The data file contains the test cases, specified as parameters that will be passed to the test function.
+
+[A Knowledge Base article describing how to add additional tests is available on the Mbed TLS website](https://tls.mbed.org/kb/development/test_suites).
+
+A test script `tests/scripts/basic-build-test.sh` is available to show test coverage of the library. New code contributions should provide a similar level of code coverage to that which already exists for the library.
+
+Sample applications, if needed, should be modified as well.
+
+Continuous Integration Tests
+----------------------------
+Once a PR has been made, the Continuous Integration (CI) tests are triggered and run. You should follow the result of the CI tests, and fix failures.
+
+It is advised to enable the [githooks scripts](https://github.com/ARMmbed/mbedtls/tree/development/tests/git-scripts) prior to pushing your changes, for catching some of the issues as early as possible.
+
+Documentation
+-------------
+Mbed TLS is well documented, but if you think documentation is needed, speak out!
+
+1. All interfaces should be documented through Doxygen. New APIs should introduce Doxygen documentation.
+1. Complex parts in the code should include comments.
+1. If needed, a Readme file is advised.
+1. If a [Knowledge Base (KB)](https://tls.mbed.org/kb) article should be added, write this as a comment in the PR description.
+1. A [ChangeLog](https://github.com/ARMmbed/mbedtls/blob/development/ChangeLog.d/00README.md) entry should be added for this contribution.

mbedtls.mod/mbedtls/ChangeLog

@@ -0,0 +1,4657 @@
+mbed TLS ChangeLog (Sorted per branch, date)
+
+= Mbed TLS 3.0.0 branch released 2021-07-07
+
+API changes
+   * Remove HAVEGE module.
+     The design of HAVEGE makes it unsuitable for microcontrollers. Platforms
+     with a more complex CPU usually have an operating system interface that
+     provides better randomness. Instead of HAVEGE, declare OS or hardware RNG
+     interfaces with mbedtls_entropy_add_source() and/or use an entropy seed
+     file created securely during device provisioning. See
+     https://tls.mbed.org/kb/how-to/add-entropy-sources-to-entropy-pool for
+     more information.
+   * Add missing const attributes to API functions.
+   * Remove helpers for the transition from Mbed TLS 1.3 to Mbed TLS 2.0: the
+     header compat-1.3.h and the script rename.pl.
+   * Remove certs module from the API.
+     Transfer keys and certificates embedded in the library to the test
+     component. This contributes to minimizing library API and discourages
+     users from using unsafe keys in production.
+   * Move alt helpers and definitions.
+     Various helpers and definitions available for use in alt implementations
+     have been moved out of the include/ directory and into the library/
+     directory. The files concerned are ecp_internal.h and rsa_internal.h
+     which have also been renamed to ecp_internal_alt.h and rsa_alt_helpers.h
+     respectively.
+   * Move internal headers.
+     Header files that were only meant for the library's internal use and
+     were not meant to be used in application code have been moved out of
+     the include/ directory. The headers concerned are bn_mul.h, aesni.h,
+     padlock.h, entropy_poll.h and *_internal.h.
+   * Drop support for parsing SSLv2 ClientHello
+     (MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO).
+   * Drop support for SSLv3 (MBEDTLS_SSL_PROTO_SSL3).
+   * Drop support for TLS record-level compression (MBEDTLS_ZLIB_SUPPORT).
+   * Drop support for RC4 TLS ciphersuites.
+   * Drop support for single-DES ciphersuites.
+   * Drop support for MBEDTLS_SSL_HW_RECORD_ACCEL.
+   * Update AEAD output size macros to bring them in line with the PSA Crypto
+     API version 1.0 spec. This version of the spec parameterizes them on the
+     key type used, as well as the key bit-size in the case of
+     PSA_AEAD_TAG_LENGTH.
+   * Add configuration option MBEDTLS_X509_REMOVE_INFO which
+     removes the mbedtls_x509_*_info(), mbedtls_debug_print_crt()
+     as well as other functions and constants only used by
+     those functions. This reduces the code footprint by
+     several kB.
+   * Remove SSL error codes `MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED`
+     and `MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH` which are never
+     returned from the public SSL API.
+   * Remove `MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE` and return
+     `MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL` instead.
+   * The output parameter of mbedtls_sha512_finish, mbedtls_sha512,
+     mbedtls_sha256_finish and mbedtls_sha256 now has a pointer type
+     rather than array type. This removes spurious warnings in some compilers
+     when outputting a SHA-384 or SHA-224 hash into a buffer of exactly
+     the hash size.
+   * Remove the MBEDTLS_TEST_NULL_ENTROPY config option. Fixes #4388.
+   * The interface of the GCM module has changed to remove restrictions on
+     how the input to multipart operations is broken down. mbedtls_gcm_finish()
+     now takes extra output parameters for the last partial output block.
+     mbedtls_gcm_update() now takes extra parameters for the output length.
+     The software implementation always produces the full output at each
+     call to mbedtls_gcm_update(), but alternative implementations activated
+     by MBEDTLS_GCM_ALT may delay partial blocks to the next call to
+     mbedtls_gcm_update() or mbedtls_gcm_finish(). Furthermore, applications
+     no longer pass the associated data to mbedtls_gcm_starts(), but to the
+     new function mbedtls_gcm_update_ad().
+     These changes are backward compatible for users of the cipher API.
+   * Replace MBEDTLS_SHA512_NO_SHA384 config option with MBEDTLS_SHA384_C.
+     This separates config option enabling the SHA384 algorithm from option
+     enabling the SHA512 algorithm. Fixes #4034.
+   * Introduce MBEDTLS_SHA224_C.
+     This separates config option enabling the SHA224 algorithm from option
+     enabling SHA256.
+   * The getter and setter API of the SSL session cache (used for
+     session-ID based session resumption) has changed to that of
+     a key-value store with keys being session IDs and values
+     being opaque instances of `mbedtls_ssl_session`.
+   * Remove the mode parameter from RSA operation functions. Signature and
+     decryption functions now always use the private key and verification and
+     encryption use the public key. Verification functions also no longer have
+     RNG parameters.
+   * Modify semantics of `mbedtls_ssl_conf_[opaque_]psk()`:
+     In Mbed TLS 2.X, the API prescribes that later calls overwrite
+     the effect of earlier calls. In Mbed TLS 3.0, calling
+     `mbedtls_ssl_conf_[opaque_]psk()` more than once will fail,
+     leaving the PSK that was configured first intact.
+     Support for more than one PSK may be added in 3.X.
+   * The function mbedtls_x509write_csr_set_extension() has an extra parameter
+     which allows to mark an extension as critical. Fixes #4055.
+   * For multi-part AEAD operations with the cipher module, calling
+     mbedtls_cipher_finish() is now mandatory. Previously the documentation
+     was unclear on this point, and this function happened to never do
+     anything with the currently implemented AEADs, so in practice it was
+     possible to skip calling it, which is no longer supported.
+   * The option MBEDTLS_ECP_FIXED_POINT_OPTIM use pre-computed comb tables
+     instead of computing tables in runtime. Thus, this option now increase
+     code size, and it does not increase RAM usage in runtime anymore.
+   * Remove the SSL APIs mbedtls_ssl_get_input_max_frag_len() and
+     mbedtls_ssl_get_output_max_frag_len(), and add a new API
+     mbedtls_ssl_get_max_in_record_payload(), complementing the existing
+     mbedtls_ssl_get_max_out_record_payload().
+     Uses of mbedtls_ssl_get_input_max_frag_len() and
+     mbedtls_ssl_get_input_max_frag_len() should be replaced by
+     mbedtls_ssl_get_max_in_record_payload() and
+     mbedtls_ssl_get_max_out_record_payload(), respectively.
+   * mbedtls_rsa_init() now always selects the PKCS#1v1.5 encoding for an RSA
+     key. To use an RSA key with PSS or OAEP, call mbedtls_rsa_set_padding()
+     after initializing the context. mbedtls_rsa_set_padding() now returns an
+     error if its parameters are invalid.
+   * Replace MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE by a runtime
+     configuration function mbedtls_ssl_conf_preference_order(). Fixes #4398.
+   * Instead of accessing the len field of a DHM context, which is no longer
+     supported, use the new function mbedtls_dhm_get_len() .
+   * In modules that implement cryptographic hash functions, many functions
+     mbedtls_xxx() now return int instead of void, and the corresponding
+     function mbedtls_xxx_ret() which was identical except for returning int
+     has been removed. This also concerns mbedtls_xxx_drbg_update(). See the
+     migration guide for more information. Fixes #4212.
+   * For all functions that take a random number generator (RNG) as a
+     parameter, this parameter is now mandatory (that is, NULL is not an
+     acceptable value). Functions which previously accepted NULL and now
+     reject it are: the X.509 CRT and CSR writing functions; the PK and RSA
+     sign and decrypt function; mbedtls_rsa_private(); the functions
+     in DHM and ECDH that compute the shared secret; the scalar multiplication
+     functions in ECP.
+   * The following functions now require an RNG parameter:
+     mbedtls_ecp_check_pub_priv(), mbedtls_pk_check_pair(),
+     mbedtls_pk_parse_key(), mbedtls_pk_parse_keyfile().
+   * mbedtls_ssl_conf_export_keys_ext_cb() and
+     mbedtls_ssl_conf_export_keys_cb() have been removed and
+     replaced by a new API mbedtls_ssl_set_export_keys_cb().
+     Raw keys and IVs are no longer passed to the callback.
+     Further, callbacks now receive an additional parameter
+     indicating the type of secret that's being exported,
+     paving the way for the larger number of secrets
+     in TLS 1.3. Finally, the key export callback and
+     context are now connection-specific.
+   * Signature functions in the RSA and PK modules now require the hash
+     length parameter to be the size of the hash input. For RSA signatures
+     other than raw PKCS#1 v1.5, this must match the output size of the
+     specified hash algorithm.
+   * The functions mbedtls_pk_sign(), mbedtls_pk_sign_restartable(),
+     mbedtls_ecdsa_write_signature() and
+     mbedtls_ecdsa_write_signature_restartable() now take an extra parameter
+     indicating the size of the output buffer for the signature.
+   * Implement one-shot cipher functions, psa_cipher_encrypt and
+     psa_cipher_decrypt, according to the PSA Crypto API 1.0.0
+     specification.
+   * Direct access to fields of structures declared in public headers is no
+     longer supported except for fields that are documented public. Use accessor
+     functions instead. For more information, see the migration guide entry
+     "Most structure fields are now private".
+   * mbedtls_ssl_get_session_pointer() has been removed, and
+     mbedtls_ssl_{set,get}_session() may now only be called once for any given
+     SSL context.
+
+Default behavior changes
+   * Enable by default the functionalities which have no reason to be disabled.
+     They are: ARIA block cipher, CMAC mode, elliptic curve J-PAKE library and
+     Key Wrapping mode as defined in NIST SP 800-38F. Fixes #4036.
+   * Some default policies for X.509 certificate verification and TLS have
+     changed: curves and hashes weaker than 255 bits are no longer accepted
+     by default. The default order in TLS now favors faster curves over larger
+     curves.
+
+Requirement changes
+   * The library now uses the %zu format specifier with the printf() family of
+     functions, so requires a toolchain that supports it. This change does not
+     affect the maintained LTS branches, so when contributing changes please
+     bear this in mind and do not add them to backported code.
+   * If you build the development version of Mbed TLS, rather than an official
+     release, some configuration-independent files are now generated at build
+     time rather than checked into source control. This includes some library
+     source files as well as the Visual Studio solution. Perl, Python 3 and a
+     C compiler for the host platform are required. See “Generated source files
+     in the development branch” in README.md for more information.
+   * Refresh the minimum supported versions of tools to build the
+     library. CMake versions older than 3.10.2 and Python older
+     than 3.6 are no longer supported.
+
+Removals
+   * Remove the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+     compile-time option, which was off by default. Users should not trust
+     certificates signed with SHA-1 due to the known attacks against SHA-1.
+     If needed, SHA-1 certificates can still be verified by using a custom
+     verification profile.
+   * Removed deprecated things in psa/crypto_compat.h. Fixes #4284
+   * Removed deprecated functions from hashing modules. Fixes #4280.
+   * Remove PKCS#11 library wrapper. PKCS#11 has limited functionality,
+     lacks automated tests and has scarce documentation. Also, PSA Crypto
+     provides a more flexible private key management.
+     More details on PCKS#11 wrapper removal can be found in the mailing list
+     https://lists.trustedfirmware.org/pipermail/mbed-tls/2020-April/000024.html
+   * Remove deprecated error codes. Fix #4283
+   * Remove MBEDTLS_ENABLE_WEAK_CIPHERSUITES configuration option. Fixes #4416.
+   * Remove the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+     compile-time option. This option has been inactive for a long time.
+     Please use the `lifetime` parameter of `mbedtls_ssl_ticket_setup()`
+     instead.
+   * Remove the following deprecated functions and constants of hex-encoded
+     primes based on RFC 5114 and RFC 3526 from library code and tests:
+     mbedtls_aes_encrypt(), mbedtls_aes_decrypt(), mbedtls_mpi_is_prime(),
+     mbedtls_cipher_auth_encrypt(), mbedtls_cipher_auth_decrypt(),
+     mbedtls_ctr_drbg_update(), mbedtls_hmac_drbg_update(),
+     mbedtls_ecdsa_write_signature_det(), mbedtls_ecdsa_sign_det(),
+     mbedtls_ssl_conf_dh_param(), mbedtls_ssl_get_max_frag_len(),
+     MBEDTLS_DHM_RFC5114_MODP_2048_P, MBEDTLS_DHM_RFC5114_MODP_2048_G,
+     MBEDTLS_DHM_RFC3526_MODP_2048_P, MBEDTLS_DHM_RFC3526_MODP_2048_G,
+     MBEDTLS_DHM_RFC3526_MODP_3072_P, MBEDTLS_DHM_RFC3526_MODP_3072_G,
+     MBEDTLS_DHM_RFC3526_MODP_4096_P, MBEDTLS_DHM_RFC3526_MODP_4096_G.
+     Remove the deprecated file: include/mbedtls/net.h. Fixes #4282.
+   * Remove MBEDTLS_SSL_MAX_CONTENT_LEN configuration option, since
+     MBEDTLS_SSL_IN_CONTENT_LEN and MBEDTLS_SSL_OUT_CONTENT_LEN replace
+     it. Fixes #4362.
+   * Remove the MBEDTLS_SSL_RECORD_CHECKING option and enable by default its
+     previous action. Fixes #4361.
+   * Remove support for TLS 1.0, TLS 1.1 and DTLS 1.0, as well as support for
+     CBC record splitting, fallback SCSV, and the ability to configure
+     ciphersuites per version, which are no longer relevant. This removes the
+     configuration options MBEDTLS_SSL_PROTO_TLS1,
+     MBEDTLS_SSL_PROTO_TLS1_1, MBEDTLS_SSL_CBC_RECORD_SPLITTING and
+     MBEDTLS_SSL_FALLBACK_SCSV as well as the functions
+     mbedtls_ssl_conf_cbc_record_splitting(),
+     mbedtls_ssl_get_key_exchange_md_ssl_tls(), mbedtls_ssl_conf_fallback(),
+     and mbedtls_ssl_conf_ciphersuites_for_version(). Fixes #4286.
+   * The RSA module no longer supports private-key operations with the public
+     key and vice versa.
+   * Remove the MBEDTLS_SSL_DTLS_BADMAC_LIMIT config.h option. Fixes #4403.
+   * Remove all the 3DES ciphersuites:
+     MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA,
+     MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA. Remove the
+     MBEDTLS_REMOVE_3DES_CIPHERSUITES option which is no longer relevant.
+     Fixes #4367.
+   * Remove the MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3 option and let the code
+     behave as if it was always disabled. Fixes #4386.
+   * Remove MBEDTLS_ECDH_LEGACY_CONTEXT config option since this was purely for
+     backward compatibility which is no longer supported. Addresses #4404.
+   * Remove the following macros: MBEDTLS_CHECK_PARAMS,
+     MBEDTLS_CHECK_PARAMS_ASSERT, MBEDTLS_PARAM_FAILED,
+     MBEDTLS_PARAM_FAILED_ALT. Fixes #4313.
+   * Remove the  MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION config.h
+     option. The mbedtls_x509_crt_parse_der_with_ext_cb() is the way to go for
+     migration path. Fixes #4378.
+   * Remove the MBEDTLS_X509_CHECK_KEY_USAGE and
+     MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE config.h options and let the code
+     behave as if they were always enabled. Fixes #4405.
+   * MBEDTLS_ECP_MAX_BITS is no longer a configuration option because it is
+     now determined automatically based on supported curves.
+   * Remove the following functions: mbedtls_timing_self_test(),
+     mbedtls_hardclock_poll(), mbedtls_timing_hardclock() and
+     mbedtls_set_alarm(). Fixes #4083.
+   * The configuration option MBEDTLS_ECP_NO_INTERNAL_RNG has been removed as
+     it no longer had any effect.
+   * Remove all support for MD2, MD4, RC4, Blowfish and XTEA. This removes the
+     corresponding modules and all their APIs and related configuration
+     options. Fixes #4084.
+   * Remove MBEDTLS_SSL_TRUNCATED_HMAC and also remove
+     MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT config option. Users are better served by
+     using a CCM-8 ciphersuite than a CBC ciphersuite with truncated HMAC.
+     See issue #4341 for more details.
+   * Remove the compile-time option
+     MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE.
+
+Features
+   * Add mbedtls_rsa_rsassa_pss_sign_ext() function allowing to generate a
+     signature with a specific salt length. This function allows to validate
+     test cases provided in the NIST's CAVP test suite. Contributed by Cédric
+     Meuter in PR #3183.
+   * Added support for built-in driver keys through the PSA opaque crypto
+     driver interface. Refer to the documentation of
+     MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS for more information.
+   * Implement psa_sign_message() and psa_verify_message().
+   * The multi-part GCM interface (mbedtls_gcm_update() or
+     mbedtls_cipher_update()) no longer requires the size of partial inputs to
+     be a multiple of 16.
+   * The multi-part GCM interface now supports chunked associated data through
+     multiple calls to mbedtls_gcm_update_ad().
+   * The new function mbedtls_mpi_random() generates a random value in a
+     given range uniformly.
+   * Alternative implementations of the AES, DHM, ECJPAKE, ECP, RSA and timing
+     modules had undocumented constraints on their context types. These
+     constraints have been relaxed.
+     See docs/architecture/alternative-implementations.md for the remaining
+     constraints.
+   * The new functions mbedtls_dhm_get_len() and mbedtls_dhm_get_bitlen()
+     query the size of the modulus in a Diffie-Hellman context.
+   * The new function mbedtls_dhm_get_value() copy a field out of a
+     Diffie-Hellman context.
+   * Use the new function mbedtls_ecjpake_set_point_format() to select the
+     point format for ECJPAKE instead of accessing the point_format field
+     directly, which is no longer supported.
+   * Implement psa_mac_compute() and psa_mac_verify() as defined in the
+     PSA Cryptograpy API 1.0.0 specification.
+
+Security
+   * Fix a bias in the generation of finite-field Diffie-Hellman-Merkle (DHM)
+     private keys and of blinding values for DHM and elliptic curves (ECP)
+     computations. Reported by FlorianF89 in #4245.
+   * Fix a potential side channel vulnerability in ECDSA ephemeral key generation.
+     An adversary who is capable of very precise timing measurements could
+     learn partial information about the leading bits of the nonce used for the
+     signature, allowing the recovery of the private key after observing a
+     large number of signature operations. This completes a partial fix in
+     Mbed TLS 2.20.0.
+   * An adversary with access to precise enough information about memory
+     accesses (typically, an untrusted operating system attacking a secure
+     enclave) could recover an RSA private key after observing the victim
+     performing a single private-key operation. Found and reported by
+     Zili KOU, Wenjian HE, Sharad Sinha, and Wei ZHANG.
+   * An adversary with access to precise enough timing information (typically, a
+     co-located process) could recover a Curve25519 or Curve448 static ECDH key
+     after inputting a chosen public key and observing the victim performing the
+     corresponding private-key operation. Found and reported by Leila Batina,
+     Lukas Chmielewski, Björn Haase, Niels Samwel and Peter Schwabe.
+
+Bugfix
+   * Fix premature fopen() call in mbedtls_entropy_write_seed_file which may
+     lead to the seed file corruption in case if the path to the seed file is
+     equal to MBEDTLS_PLATFORM_STD_NV_SEED_FILE. Contributed by Victor
+     Krasnoshchok in #3616.
+   * PSA functions creating a key now return PSA_ERROR_INVALID_ARGUMENT rather
+     than PSA_ERROR_INVALID_HANDLE when the identifier specified for the key
+     to create is not valid, bringing them in line with version 1.0.0 of the
+     specification. Fix #4271.
+   * Add printf function attributes to mbedtls_debug_print_msg to ensure we
+     get printf format specifier warnings.
+   * PSA functions other than psa_open_key now return PSA_ERROR_INVALID_HANDLE
+     rather than PSA_ERROR_DOES_NOT_EXIST for an invalid handle, bringing them
+     in line with version 1.0.0 of the specification. Fix #4162.
+   * Fix a bug in ECDSA that would cause it to fail when the hash is all-bits
+     zero. Fixes #1792
+   * Fix some cases in the bignum module where the library constructed an
+     unintended representation of the value 0 which was not processed
+     correctly by some bignum operations. This could happen when
+     mbedtls_mpi_read_string() was called on "-0", or when
+     mbedtls_mpi_mul_mpi() and mbedtls_mpi_mul_int() was called with one of
+     the arguments being negative and the other being 0. Fixes #4643.
+   * Fix a compilation error when MBEDTLS_ECP_RANDOMIZE_MXZ_ALT is
+     defined. Fixes #4217.
+   * Fix an incorrect error code when parsing a PKCS#8 private key.
+   * In a TLS client, enforce the Diffie-Hellman minimum parameter size
+     set with mbedtls_ssl_conf_dhm_min_bitlen() precisely. Before, the
+     minimum size was rounded down to the nearest multiple of 8.
+   * In library/net_sockets.c, _POSIX_C_SOURCE and _XOPEN_SOURCE are
+     defined to specific values.  If the code is used in a context
+     where these are already defined, this can result in a compilation
+     error.  Instead, assume that if they are defined, the values will
+     be adequate to build Mbed TLS.
+   * With MBEDTLS_PSA_CRYPTO_C disabled, some functions were getting built
+     nonetheless, resulting in undefined reference errors when building a
+     shared library. Reported by Guillermo Garcia M. in #4411.
+   * The cipher suite TLS-RSA-WITH-CAMELLIA-256-GCM-SHA384 was not available
+     when SHA-1 was disabled and was offered when SHA-1 was enabled but SHA-384
+     was disabled. Fix the dependency. Fixes #4472.
+   * Do not offer SHA384 cipher suites when SHA-384 is disabled. Fixes #4499.
+   * Fix test suite code on platforms where int32_t is not int, such as
+     Arm Cortex-M. Fixes #4530.
+   * Fix some issues affecting MBEDTLS_ARIA_ALT implementations: a misplaced
+     directive in a header and a missing initialization in the self-test.
+   * Fix a missing initialization in the Camellia self-test, affecting
+     MBEDTLS_CAMELLIA_ALT implementations.
+   * Restore the ability to configure PSA via Mbed TLS options to support RSA
+     key pair operations but exclude RSA key generation. When MBEDTLS_GENPRIME
+     is not defined PSA will no longer attempt to use mbedtls_rsa_gen_key().
+     Fixes #4512.
+   * Fix a regression introduced in 2.24.0 which broke (D)TLS CBC ciphersuites
+     (when the encrypt-then-MAC extension is not in use) with some ALT
+     implementations of the underlying hash (SHA-1, SHA-256, SHA-384), causing
+     the affected side to wrongly reject valid messages. Fixes #4118.
+   * Remove outdated check-config.h check that prevented implementing the
+     timing module on Mbed OS. Fixes #4633.
+   * Fix PSA_ALG_TLS12_PRF and PSA_ALG_TLS12_PSK_TO_MS being too permissive
+     about missing inputs.
+   * Fix mbedtls_net_poll() and mbedtls_net_recv_timeout() often failing with
+     MBEDTLS_ERR_NET_POLL_FAILED on Windows. Fixes #4465.
+   * Fix a resource leak in a test suite with an alternative AES
+     implementation. Fixes #4176.
+   * Fix a crash in mbedtls_mpi_debug_mpi on a bignum having 0 limbs. This
+     could notably be triggered by setting the TLS debug level to 3 or above
+     and using a Montgomery curve for the key exchange. Reported by lhuang04
+     in #4578. Fixes #4608.
+   * psa_verify_hash() was relying on implementation-specific behavior of
+     mbedtls_rsa_rsassa_pss_verify() and was causing failures in some _ALT
+     implementations. This reliance is now removed. Fixes #3990.
+   * Disallow inputs of length different from the corresponding hash when
+     signing or verifying with PSA_ALG_RSA_PSS (The PSA Crypto API mandates
+     that PSA_ALG_RSA_PSS uses the same hash throughout the algorithm.)
+   * Fix a null pointer dereference when mbedtls_mpi_exp_mod() was called with
+     A=0 represented with 0 limbs. Up to and including Mbed TLS 2.26, this bug
+     could not be triggered by code that constructed A with one of the
+     mbedtls_mpi_read_xxx functions (including in particular TLS code) since
+     those always built an mpi object with at least one limb.
+     Credit to OSS-Fuzz. Fixes #4641.
+   * Fix mbedtls_mpi_gcd(G,A,B) when the value of B is zero. This had no
+     effect on Mbed TLS's internal use of mbedtls_mpi_gcd(), but may affect
+     applications that call mbedtls_mpi_gcd() directly. Fixes #4642.
+   * The PSA API no longer allows the creation or destruction of keys with a
+     read-only lifetime. The persistence level PSA_KEY_PERSISTENCE_READ_ONLY
+     can now only be used as intended, for keys that cannot be modified through
+     normal use of the API.
+   * When MBEDTLS_PSA_CRYPTO_SPM is enabled, crypto_spe.h was not included
+     in all the right places. Include it from crypto_platform.h, which is
+     the natural place. Fixes #4649.
+   * Fix which alert is sent in some cases to conform to the
+     applicable RFC: on an invalid Finished message value, an
+     invalid max_fragment_length extension, or an
+     unsupported extension used by the server.
+   * Correct (change from 12 to 13 bytes) the value of the macro describing the
+     maximum nonce length returned by psa_aead_generate_nonce().
+
+Changes
+   * Fix the setting of the read timeout in the DTLS sample programs.
+   * Add extra printf compiler warning flags to builds.
+   * Fix memsan build false positive in x509_crt.c with clang 11
+   * Alternative implementations of CMAC may now opt to not support 3DES as a
+     CMAC block cipher, and still pass the CMAC self test.
+   * Remove the AES sample application programs/aes/aescrypt2 which shows
+     bad cryptographic practice. Fix #1906.
+   * Remove configs/config-psa-crypto.h, which no longer had any intended
+     differences from the default configuration, but had accidentally diverged.
+   * When building the test suites with GNU make, invoke python3 or python, not
+     python2, which is no longer supported upstream.
+   * fix build failure on MinGW toolchain when __USE_MING_ANSI_STDIO is on.
+     When that flag is on, standard GNU C printf format specifiers
+     should be used.
+   * Replace MBEDTLS_SSL_CID_PADDING_GRANULARITY and
+     MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY with a new single unified option
+     MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY. Fixes #4335.
+   * Reduce the default value of MBEDTLS_ECP_WINDOW_SIZE. This reduces RAM usage
+     during ECC operations at a negligible performance cost.
+   * mbedtls_mpi_read_binary(), mbedtls_mpi_read_binary_le() and
+     mbedtls_mpi_read_string() now construct an mbedtls_mpi object with 0 limbs
+     when their input has length 0. Note that this is an implementation detail
+     and can change at any time, so this change should be transparent, but it
+     may result in mbedtls_mpi_write_binary() or mbedtls_mpi_write_string()
+     now writing an empty string where it previously wrote one or more
+     zero digits when operating from values constructed with an mpi_read
+     function and some mpi operations.
+   * Add CMake package config generation for CMake projects consuming Mbed TLS.
+   * config.h has been split into build_info.h and mbedtls_config.h
+     build_info.h is intended to be included from C code directly, while
+     mbedtls_config.h is intended to be edited by end users wishing to
+     change the build configuration, and should generally only be included from
+     build_info.h.
+   * The handling of MBEDTLS_CONFIG_FILE has been moved into build_info.h.
+   * A config file version symbol, MBEDTLS_CONFIG_VERSION was introduced.
+     Defining it to a particular value will ensure that Mbed TLS interprets
+     the config file in a way that's compatible with the config file format
+     used by the Mbed TLS release whose MBEDTLS_VERSION_NUMBER has the same
+     value.
+     The only value supported by Mbed TLS 3.0.0 is 0x03000000.
+   * Various changes to which alert and/or error code may be returned
+   * during the TLS handshake.
+   * Implicitly add PSA_KEY_USAGE_SIGN_MESSAGE key usage policy flag when
+     PSA_KEY_USAGE_SIGN_HASH flag is set and PSA_KEY_USAGE_VERIFY_MESSAGE flag
+     when PSA_KEY_USAGE_VERIFY_HASH flag is set. This usage flag extension
+     is also applied when loading a key from storage.
+
+= mbed TLS 2.26.0 branch released 2021-03-08
+
+API changes
+   * Renamed the PSA Crypto API output buffer size macros to bring them in line
+     with version 1.0.0 of the specification.
+   * The API glue function mbedtls_ecc_group_of_psa() now takes the curve size
+     in bits rather than bytes, with an additional flag to indicate if the
+     size may have been rounded up to a whole number of bytes.
+   * Renamed the PSA Crypto API AEAD tag length macros to bring them in line
+     with version 1.0.0 of the specification.
+
+Default behavior changes
+   * In mbedtls_rsa_context objects, the ver field was formerly documented
+     as always 0. It is now reserved for internal purposes and may take
+     different values.
+
+New deprecations
+   * PSA_KEY_EXPORT_MAX_SIZE, PSA_HASH_SIZE, PSA_MAC_FINAL_SIZE,
+     PSA_BLOCK_CIPHER_BLOCK_SIZE, PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE and
+     PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN have been renamed, and the old names
+     deprecated.
+   * PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH and PSA_ALG_AEAD_WITH_TAG_LENGTH
+     have been renamed, and the old names deprecated.
+
+Features
+   * The PSA crypto subsystem can now use HMAC_DRBG instead of CTR_DRBG.
+     CTR_DRBG is used by default if it is available, but you can override
+     this choice by setting MBEDTLS_PSA_HMAC_DRBG_MD_TYPE at compile time.
+     Fix #3354.
+   * Automatic fallback to a software implementation of ECP when
+     MBEDTLS_ECP_xxx_ALT accelerator hooks are in use can now be turned off
+     through setting the new configuration flag MBEDTLS_ECP_NO_FALLBACK.
+   * The PSA crypto subsystem can now be configured to use less static RAM by
+     tweaking the setting for the maximum amount of keys simultaneously in RAM.
+     MBEDTLS_PSA_KEY_SLOT_COUNT sets the maximum number of volatile keys that
+     can exist simultaneously. It has a sensible default if not overridden.
+   * Partial implementation of the PSA crypto driver interface: Mbed TLS can
+     now use an external random generator instead of the library's own
+     entropy collection and DRBG code. Enable MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG
+     and see the documentation of mbedtls_psa_external_get_random() for details.
+   * Applications using both mbedtls_xxx and psa_xxx functions (for example,
+     applications using TLS and MBEDTLS_USE_PSA_CRYPTO) can now use the PSA
+     random generator with mbedtls_xxx functions. See the documentation of
+     mbedtls_psa_get_random() for details.
+   * In the PSA API, the policy for a MAC or AEAD algorithm can specify a
+     minimum MAC or tag length thanks to the new wildcards
+     PSA_ALG_AT_LEAST_THIS_LENGTH_MAC and
+     PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG.
+
+Security
+   * Fix a security reduction in CTR_DRBG when the initial seeding obtained a
+     nonce from entropy. Applications were affected if they called
+     mbedtls_ctr_drbg_set_nonce_len(), if they called
+     mbedtls_ctr_drbg_set_entropy_len() with a size that was 3/2 times the key
+     length, or when the entropy module uses SHA-256 and CTR_DRBG uses AES-256.
+     In such cases, a random nonce was necessary to achieve the advertised
+     security strength, but the code incorrectly used a constant instead of
+     entropy from the nonce.
+     Found by John Stroebel in #3819 and fixed in #3973.
+   * Fix a buffer overflow in mbedtls_mpi_sub_abs() when calculating
+     |A| - |B| where |B| is larger than |A| and has more limbs (so the
+     function should return MBEDTLS_ERR_MPI_NEGATIVE_VALUE). Only
+     applications calling mbedtls_mpi_sub_abs() directly are affected:
+     all calls inside the library were safe since this function is
+     only called with |A| >= |B|. Reported by Guido Vranken in #4042.
+   * Fix an errorneous estimation for an internal buffer in
+     mbedtls_pk_write_key_pem(). If MBEDTLS_MPI_MAX_SIZE is set to an odd
+     value the function might fail to write a private RSA keys of the largest
+     supported size.
+     Found by Daniel Otte, reported in #4093 and fixed in #4094.
+   * Fix a stack buffer overflow with mbedtls_net_poll() and
+     mbedtls_net_recv_timeout() when given a file descriptor that is
+     beyond FD_SETSIZE. Reported by FigBug in #4169.
+   * Guard against strong local side channel attack against base64 tables by
+     making access aceess to them use constant flow code.
+
+Bugfix
+   * Fix use-after-scope error in programs/ssl/ssl_client2.c and ssl_server2.c
+   * Fix memory leak that occured when calling psa_close_key() on a
+     wrapped key with MBEDTLS_PSA_CRYPTO_SE_C defined.
+   * Fix an incorrect error code if an RSA private operation glitched.
+   * Fix a memory leak in an error case in psa_generate_derived_key_internal().
+   * Fix a resource leak in CTR_DRBG and HMAC_DRBG when MBEDTLS_THREADING_C
+     is enabled, on platforms where initializing a mutex allocates resources.
+     This was a regression introduced in the previous release. Reported in
+     #4017, #4045 and #4071.
+   * Ensure that calling mbedtls_rsa_free() or mbedtls_entropy_free()
+     twice is safe. This happens for RSA when some Mbed TLS library functions
+     fail. Such a double-free was not safe when MBEDTLS_THREADING_C was
+     enabled on platforms where freeing a mutex twice is not safe.
+   * Fix a resource leak in a bad-arguments case of mbedtls_rsa_gen_key()
+     when MBEDTLS_THREADING_C is enabled on platforms where initializing
+     a mutex allocates resources.
+   * Fixes a bug where, if the library was configured to include support for
+     both the old SE interface and the new PSA driver interface, external keys were
+     not loaded from storage. This was fixed by #3996.
+   * This change makes 'mbedtls_x509write_crt_set_basic_constraints'
+     consistent with RFC 5280 4.2.1.9 which says: "Conforming CAs MUST
+     include this extension in all CA certificates that contain public keys
+     used to validate digital signatures on certificates and MUST mark the
+     extension as critical in such certificates." Previous to this change,
+     the extension was always marked as non-critical. This was fixed by
+     #3698.
+
+Changes
+   * A new library C file psa_crypto_client.c has been created to contain
+     the PSA code needed by a PSA crypto client when the PSA crypto
+     implementation is not included into the library.
+   * On recent enough versions of FreeBSD and DragonFlyBSD, the entropy module
+     now uses the getrandom syscall instead of reading from /dev/urandom.
+
+= mbed TLS 2.25.0 branch released 2020-12-11
+
+API changes
+   * The numerical values of the PSA Crypto API macros have been updated to
+     conform to version 1.0.0 of the specification.
+   * PSA_ALG_STREAM_CIPHER replaces PSA_ALG_CHACHA20 and PSA_ALG_ARC4.
+     The underlying stream cipher is determined by the key type
+     (PSA_KEY_TYPE_CHACHA20 or PSA_KEY_TYPE_ARC4).
+   * The functions mbedtls_cipher_auth_encrypt() and
+     mbedtls_cipher_auth_decrypt() no longer accept NIST_KW contexts,
+     as they have no way to check if the output buffer is large enough.
+     Please use mbedtls_cipher_auth_encrypt_ext() and
+     mbedtls_cipher_auth_decrypt_ext() instead. Credit to OSS-Fuzz and
+     Cryptofuzz. Fixes #3665.
+
+Requirement changes
+   * Update the minimum required CMake version to 2.8.12.  This silences a
+     warning on CMake 3.19.0. #3801
+
+New deprecations
+   * PSA_ALG_CHACHA20 and PSA_ALG_ARC4 have been deprecated.
+     Use PSA_ALG_STREAM_CIPHER instead.
+   * The functions mbedtls_cipher_auth_encrypt() and
+     mbedtls_cipher_auth_decrypt() are deprecated in favour of the new
+     functions mbedtls_cipher_auth_encrypt_ext() and
+     mbedtls_cipher_auth_decrypt_ext(). Please note that with AEAD ciphers,
+     these new functions always append the tag to the ciphertext, and include
+     the tag in the ciphertext length.
+
+Features
+   * Partial implementation of the new PSA Crypto accelerator APIs. (Symmetric
+     ciphers, asymmetric signing/verification and key generation, validate_key
+     entry point, and export_public_key interface.)
+   * Add support for ECB to the PSA cipher API.
+   * In PSA, allow using a key declared with a base key agreement algorithm
+     in combined key agreement and derivation operations, as long as the key
+     agreement algorithm in use matches the algorithm the key was declared with.
+     This is currently non-standard behaviour, but expected to make it into a
+     future revision of the PSA Crypto standard.
+   * Add MBEDTLS_TARGET_PREFIX CMake variable, which is prefixed to the mbedtls,
+     mbedcrypto, mbedx509 and apidoc CMake target names. This can be used by
+     external CMake projects that include this one to avoid CMake target name
+     clashes.  The default value of this variable is "", so default target names
+     are unchanged.
+   * Add support for DTLS-SRTP as defined in RFC 5764. Contributed by Johan
+     Pascal, improved by Ron Eldor.
+   * In the PSA API, it is no longer necessary to open persistent keys:
+     operations now accept the key identifier. The type psa_key_handle_t is now
+     identical to psa_key_id_t instead of being platform-defined. This bridges
+     the last major gap to compliance with the PSA Cryptography specification
+     version 1.0.0. Opening persistent keys is still supported for backward
+     compatibility, but will be deprecated and later removed in future
+     releases.
+   * PSA_AEAD_NONCE_LENGTH, PSA_AEAD_NONCE_MAX_SIZE, PSA_CIPHER_IV_LENGTH and
+     PSA_CIPHER_IV_MAX_SIZE macros have been added as defined in version
+     1.0.0 of the PSA Crypto API specification.
+
+Security
+   * The functions mbedtls_cipher_auth_encrypt() and
+     mbedtls_cipher_auth_decrypt() would write past the minimum documented
+     size of the output buffer when used with NIST_KW. As a result, code using
+     those functions as documented with NIST_KW could have a buffer overwrite
+     of up to 15 bytes, with consequences ranging up to arbitrary code
+     execution depending on the location of the output buffer.
+   * Limit the size of calculations performed by mbedtls_mpi_exp_mod to
+     MBEDTLS_MPI_MAX_SIZE to prevent a potential denial of service when
+     generating Diffie-Hellman key pairs. Credit to OSS-Fuzz.
+   * A failure of the random generator was ignored in mbedtls_mpi_fill_random(),
+     which is how most uses of randomization in asymmetric cryptography
+     (including key generation, intermediate value randomization and blinding)
+     are implemented. This could cause failures or the silent use of non-random
+     values. A random generator can fail if it needs reseeding and cannot not
+     obtain entropy, or due to an internal failure (which, for Mbed TLS's own
+     CTR_DRBG or HMAC_DRBG, can only happen due to a misconfiguration).
+   * Fix a compliance issue whereby we were not checking the tag on the
+     algorithm parameters (only the size) when comparing the signature in the
+     description part of the cert to the real signature. This meant that a
+     NULL algorithm parameters entry would look identical to an array of REAL
+     (size zero) to the library and thus the certificate would be considered
+     valid. However, if the parameters do not match in *any* way then the
+     certificate should be considered invalid, and indeed OpenSSL marks these
+     certs as invalid when mbedtls did not.
+     Many thanks to guidovranken who found this issue via differential fuzzing
+     and reported it in #3629.
+   * Zeroising of local buffers and variables which are used for calculations
+     in mbedtls_pkcs5_pbkdf2_hmac(), mbedtls_internal_sha*_process(),
+     mbedtls_internal_md*_process() and mbedtls_internal_ripemd160_process()
+     functions to erase sensitive data from memory. Reported by
+     Johan Malmgren and Johan Uppman Bruce from Sectra.
+
+Bugfix
+   * Fix an invalid (but nonzero) return code from mbedtls_pk_parse_subpubkey()
+     when the input has trailing garbage. Fixes #2512.
+   * Fix build failure in configurations where MBEDTLS_USE_PSA_CRYPTO is
+     enabled but ECDSA is disabled. Contributed by jdurkop. Fixes #3294.
+   * Include the psa_constant_names generated source code in the source tree
+     instead of generating it at build time. Fixes #3524.
+   * Fix rsa_prepare_blinding() to retry when the blinding value is not
+     invertible (mod N), instead of returning MBEDTLS_ERR_RSA_RNG_FAILED. This
+     addresses a regression but is rare in practice (approx. 1 in 2/sqrt(N)).
+     Found by Synopsys Coverity, fix contributed by Peter Kolbus (Garmin).
+     Fixes #3647.
+   * Use socklen_t on Android and other POSIX-compliant system
+   * Fix the build when the macro _GNU_SOURCE is defined to a non-empty value.
+     Fix #3432.
+   * Consistently return PSA_ERROR_INVALID_ARGUMENT on invalid cipher input
+     sizes (instead of PSA_ERROR_BAD_STATE in some cases) to make the
+     psa_cipher_* functions compliant with the PSA Crypto API specification.
+   * mbedtls_ecp_curve_list() now lists Curve25519 and Curve448 under the names
+     "x25519" and "x448". These curves support ECDH but not ECDSA. If you need
+     only the curves that support ECDSA, filter the list with
+     mbedtls_ecdsa_can_do().
+   * Fix psa_generate_key() returning an error when asked to generate
+     an ECC key pair on Curve25519 or secp244k1.
+   * Fix psa_key_derivation_output_key() to allow the output of a combined key
+     agreement and subsequent key derivation operation to be used as a key
+     inside of the PSA Crypto core.
+   * Fix handling of EOF against 0xff bytes and on platforms with unsigned
+     chars. Fixes a build failure on platforms where char is unsigned. Fixes
+     #3794.
+   * Fix an off-by-one error in the additional data length check for
+     CCM, which allowed encryption with a non-standard length field.
+     Fixes #3719.
+   * Correct the default IV size for mbedtls_cipher_info_t structures using
+     MBEDTLS_MODE_ECB to 0, since ECB mode ciphers don't use IVs.
+   * Make arc4random_buf available on NetBSD and OpenBSD when _POSIX_C_SOURCE is
+     defined. Fix contributed in #3571.
+   * Fix conditions for including string.h in error.c. Fixes #3866.
+   * psa_set_key_id() now also sets the lifetime to persistent for keys located
+     in a secure element.
+   * Attempting to create a volatile key with a non-zero key identifier now
+     fails. Previously the key identifier was just ignored when creating a
+     volatile key.
+   * Attempting to create or register a key with a key identifier in the vendor
+     range now fails.
+   * Fix build failures on GCC 11. Fixes #3782.
+   * Add missing arguments of debug message in mbedtls_ssl_decrypt_buf.
+   * Fix a memory leak in mbedtls_mpi_sub_abs() when the result was negative
+     (an error condition) and the second operand was aliased to the result.
+   * Fix a case in elliptic curve arithmetic where an out-of-memory condition
+     could go undetected, resulting in an incorrect result.
+   * In CTR_DRBG and HMAC_DRBG, don't reset the reseed interval in seed().
+     Fixes #2927.
+   * In PEM writing functions, fill the trailing part of the buffer with null
+     bytes. This guarantees that the corresponding parsing function can read
+     the buffer back, which was the case for mbedtls_x509write_{crt,csr}_pem
+     until this property was inadvertently broken in Mbed TLS 2.19.0.
+     Fixes #3682.
+   * Fix a build failure that occurred with the MBEDTLS_AES_SETKEY_DEC_ALT
+     option on. In this configuration key management methods that are required
+     for MBEDTLS_CIPHER_MODE_XTS were excluded from the build and made it fail.
+     Fixes #3818. Reported by John Stroebel.
+
+Changes
+   * Reduce stack usage significantly during sliding window exponentiation.
+     Reported in #3591 and fix contributed in #3592 by Daniel Otte.
+   * The PSA persistent storage format is updated to always store the key bits
+     attribute. No automatic upgrade path is provided. Previously stored keys
+     must be erased, or manually upgraded based on the key storage format
+     specification (docs/architecture/mbed-crypto-storage-specification.md).
+     Fixes #3740.
+   * Remove the zeroization of a pointer variable in AES rounds. It was valid
+     but spurious and misleading since it looked like a mistaken attempt to
+     zeroize the pointed-to buffer. Reported by Antonio de la Piedra, CEA
+     Leti, France.
+
+= mbed TLS 2.24.0 branch released 2020-09-01
+
+API changes
+   * In the PSA API, rename the types of elliptic curve and Diffie-Hellman
+     group families to psa_ecc_family_t and psa_dh_family_t, in line with the
+     PSA Crypto API specification version 1.0.0.
+     Rename associated macros as well:
+     PSA_ECC_CURVE_xxx renamed to PSA_ECC_FAMILY_xxx
+     PSA_DH_GROUP_xxx renamed to PSA_DH_FAMILY_xxx
+     PSA_KEY_TYPE_GET_CURVE renamed to to PSA_KEY_TYPE_ECC_GET_FAMILY
+     PSA_KEY_TYPE_GET_GROUP renamed to PSA_KEY_TYPE_DH_GET_FAMILY
+
+Default behavior changes
+   * Stop storing persistent information about externally stored keys created
+     through PSA Crypto with a volatile lifetime. Reported in #3288 and
+     contributed by Steven Cooreman in #3382.
+
+Features
+   * The new function mbedtls_ecp_write_key() exports private ECC keys back to
+     a byte buffer. It is the inverse of the existing mbedtls_ecp_read_key().
+   * Support building on e2k (Elbrus) architecture: correctly enable
+     -Wformat-signedness, and fix the code that causes signed-one-bit-field
+     and sign-compare warnings. Contributed by makise-homura (Igor Molchanov)
+     <[email protected]>.
+
+Security
+   * Fix a vulnerability in the verification of X.509 certificates when
+     matching the expected common name (the cn argument of
+     mbedtls_x509_crt_verify()) with the actual certificate name: when the
+     subjecAltName extension is present, the expected name was compared to any
+     name in that extension regardless of its type. This means that an
+     attacker could for example impersonate a 4-bytes or 16-byte domain by
+     getting a certificate for the corresponding IPv4 or IPv6 (this would
+     require the attacker to control that IP address, though). Similar attacks
+     using other subjectAltName name types might be possible. Found and
+     reported by kFYatek in #3498.
+   * When checking X.509 CRLs, a certificate was only considered as revoked if
+     its revocationDate was in the past according to the local clock if
+     available. In particular, on builds without MBEDTLS_HAVE_TIME_DATE,
+     certificates were never considered as revoked. On builds with
+     MBEDTLS_HAVE_TIME_DATE, an attacker able to control the local clock (for
+     example, an untrusted OS attacking a secure enclave) could prevent
+     revocation of certificates via CRLs. Fixed by no longer checking the
+     revocationDate field, in accordance with RFC 5280. Reported by
+     yuemonangong in #3340. Reported independently and fixed by
+     Raoul Strackx and Jethro Beekman in #3433.
+   * In (D)TLS record decryption, when using a CBC ciphersuites without the
+     Encrypt-then-Mac extension, use constant code flow memory access patterns
+     to extract and check the MAC. This is an improvement to the existing
+     countermeasure against Lucky 13 attacks. The previous countermeasure was
+     effective against network-based attackers, but less so against local
+     attackers. The new countermeasure defends against local attackers, even
+     if they have access to fine-grained measurements. In particular, this
+     fixes a local Lucky 13 cache attack found and reported by Tuba Yavuz,
+     Farhaan Fowze, Ken (Yihan) Bai, Grant Hernandez, and Kevin Butler
+     (University of Florida) and Dave Tian (Purdue University).
+   * Fix side channel in RSA private key operations and static (finite-field)
+     Diffie-Hellman. An adversary with precise enough timing and memory access
+     information (typically an untrusted operating system attacking a secure
+     enclave) could bypass an existing counter-measure (base blinding) and
+     potentially fully recover the private key.
+   * Fix a 1-byte buffer overread in mbedtls_x509_crl_parse_der().
+     Credit to OSS-Fuzz for detecting the problem and to Philippe Antoine
+     for pinpointing the problematic code.
+   * Zeroising of plaintext buffers in mbedtls_ssl_read() to erase unused
+     application data from memory. Reported in #689 by
+     Johan Uppman Bruce of Sectra.
+
+Bugfix
+   * Library files installed after a CMake build no longer have execute
+     permission.
+   * Use local labels in mbedtls_padlock_has_support() to fix an invalid symbol
+     redefinition if the function is inlined.
+     Reported in #3451 and fix contributed in #3452 by okhowang.
+   * Fix the endianness of Curve25519 keys imported/exported through the PSA
+     APIs. psa_import_key and psa_export_key will now correctly expect/output
+     Montgomery keys in little-endian as defined by RFC7748. Contributed by
+     Steven Cooreman in #3425.
+   * Fix build errors when the only enabled elliptic curves are Montgomery
+     curves. Raised by signpainter in #941 and by Taiki-San in #1412. This
+     also fixes missing declarations reported by Steven Cooreman in #1147.
+   * Fix self-test failure when the only enabled short Weierstrass elliptic
+     curve is secp192k1. Fixes #2017.
+   * PSA key import will now correctly import a Curve25519/Curve448 public key
+     instead of erroring out. Contributed by Steven Cooreman in #3492.
+   * Use arc4random_buf on NetBSD instead of rand implementation with cyclical
+     lower bits. Fix contributed in #3540.
+   * Fix a memory leak in mbedtls_md_setup() when using HMAC under low memory
+     conditions. Reported and fix suggested by Guido Vranken in #3486.
+   * Fix bug in redirection of unit test outputs on platforms where stdout is
+     defined as a macro. First reported in #2311 and fix contributed in #3528.
+
+Changes
+   * Only pass -Wformat-signedness to versions of GCC that support it. Reported
+     in #3478 and fix contributed in #3479 by okhowang.
+   * Reduce the stack consumption of mbedtls_x509write_csr_der() which
+     previously could lead to stack overflow on constrained devices.
+     Contributed by Doru Gucea and Simon Leet in #3464.
+   * Undefine the ASSERT macro before defining it locally, in case it is defined
+     in a platform header. Contributed by Abdelatif Guettouche in #3557.
+   * Update copyright notices to use Linux Foundation guidance. As a result,
+     the copyright of contributors other than Arm is now acknowledged, and the
+     years of publishing are no longer tracked in the source files. This also
+     eliminates the need for the lines declaring the files to be part of
+     MbedTLS. Fixes #3457.
+   * Add the command line parameter key_pwd to the ssl_client2 and ssl_server2
+     example applications which allows to provide a password for the key file
+     specified through the existing key_file argument. This allows the use of
+     these applications with password-protected key files. Analogously but for
+     ssl_server2 only, add the command line parameter key_pwd2 which allows to
+     set a password for the key file provided through the existing key_file2
+     argument.
+
+= mbed TLS 2.23.0 branch released 2020-07-01
+
+Default behavior changes
+   * In the experimental PSA secure element interface, change the encoding of
+     key lifetimes to encode a persistence level and the location. Although C
+     prototypes do not effectively change, code calling
+     psa_register_se_driver() must be modified to pass the driver's location
+     instead of the keys' lifetime. If the library is upgraded on an existing
+     device, keys created with the old lifetime value will not be readable or
+     removable through Mbed TLS after the upgrade.
+
+Features
+   * New functions in the error module return constant strings for
+     high- and low-level error codes, complementing mbedtls_strerror()
+     which constructs a string for any error code, including compound
+     ones, but requires a writable buffer. Contributed by Gaurav Aggarwal
+     in #3176.
+   * The new utility programs/ssl/ssl_context_info prints a human-readable
+     dump of an SSL context saved with mbedtls_ssl_context_save().
+   * Add support for midipix, a POSIX layer for Microsoft Windows.
+   * Add new mbedtls_x509_crt_parse_der_with_ext_cb() routine which allows
+     parsing unsupported certificate extensions via user provided callback.
+     Contributed by Nicola Di Lieto <[email protected]> in #3243 as
+     a solution to #3241.
+   * Pass the "certificate policies" extension to the callback supplied to
+     mbedtls_x509_crt_parse_der_with_ext_cb() if it contains unsupported
+     policies (#3419).
+   * Added support to entropy_poll for the kern.arandom syscall supported on
+     some BSD systems. Contributed by Nia Alarie in #3423.
+   * Add support for Windows 2000 in net_sockets. Contributed by opatomic. #3239
+
+Security
+   * Fix a side channel vulnerability in modular exponentiation that could
+     reveal an RSA private key used in a secure enclave. Noticed by Sangho Lee,
+     Ming-Wei Shih, Prasun Gera, Taesoo Kim and Hyesoon Kim (Georgia Institute
+     of Technology); and Marcus Peinado (Microsoft Research). Reported by Raoul
+     Strackx (Fortanix) in #3394.
+   * Fix side channel in mbedtls_ecp_check_pub_priv() and
+     mbedtls_pk_parse_key() / mbedtls_pk_parse_keyfile() (when loading a
+     private key that didn't include the uncompressed public key), as well as
+     mbedtls_ecp_mul() / mbedtls_ecp_mul_restartable() when called with a NULL
+     f_rng argument. An attacker with access to precise enough timing and
+     memory access information (typically an untrusted operating system
+     attacking a secure enclave) could fully recover the ECC private key.
+     Found and reported by Alejandro Cabrera Aldaya and Billy Brumley.
+   * Fix issue in Lucky 13 counter-measure that could make it ineffective when
+     hardware accelerators were used (using one of the MBEDTLS_SHAxxx_ALT
+     macros). This would cause the original Lucky 13 attack to be possible in
+     those configurations, allowing an active network attacker to recover
+     plaintext after repeated timing measurements under some conditions.
+     Reported and fix suggested by Luc Perneel in #3246.
+
+Bugfix
+   * Fix the Visual Studio Release x64 build configuration for mbedtls itself.
+     Completes a previous fix in Mbed TLS 2.19 that only fixed the build for
+     the example programs. Reported in #1430 and fix contributed by irwir.
+   * Fix undefined behavior in X.509 certificate parsing if the
+     pathLenConstraint basic constraint value is equal to INT_MAX.
+     The actual effect with almost every compiler is the intended
+     behavior, so this is unlikely to be exploitable anywhere. #3192
+   * Fix issue with a detected HW accelerated record error not being exposed
+     due to shadowed variable. Contributed by Sander Visser in #3310.
+   * Avoid NULL pointer dereferencing if mbedtls_ssl_free() is called with a
+     NULL pointer argument. Contributed by Sander Visser in #3312.
+   * Fix potential linker errors on dual world platforms by inlining
+     mbedtls_gcc_group_to_psa(). This allows the pk.c module to link separately
+     from psa_crypto.c. Fixes #3300.
+   * Remove dead code in X.509 certificate parsing. Contributed by irwir in
+     #2855.
+   * Include asn1.h in error.c. Fixes #3328 reported by David Hu.
+   * Fix potential memory leaks in ecp_randomize_jac() and ecp_randomize_mxz()
+     when PRNG function fails. Contributed by Jonas Lejeune in #3318.
+   * Remove unused macros from MSVC projects. Reported in #3297 and fix
+     submitted in #3333 by irwir.
+   * Add additional bounds checks in ssl_write_client_hello() preventing
+     output buffer overflow if the configuration declared a buffer that was
+     too small.
+   * Set _POSIX_C_SOURCE to at least 200112L in C99 code. Reported in #3420 and
+     fix submitted in #3421 by Nia Alarie.
+   * Fix building library/net_sockets.c and the ssl_mail_client program on
+     NetBSD. Contributed by Nia Alarie in #3422.
+   * Fix false positive uninitialised variable reported by cpp-check.
+     Contributed by Sander Visser in #3311.
+   * Update iv and len context pointers manually when reallocating buffers
+     using the MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH feature. This caused issues
+     when receiving a connection with CID, when these fields were shifted
+     in ssl_parse_record_header().
+
+Changes
+   * Fix warnings about signedness issues in format strings. The build is now
+     clean of -Wformat-signedness warnings. Contributed by Kenneth Soerensen
+     in #3153.
+   * Fix minor performance issue in operations on Curve25519 caused by using a
+     suboptimal modular reduction in one place. Found and fix contributed by
+     Aurelien Jarno in #3209.
+   * Combine identical cases in switch statements in md.c. Contributed
+     by irwir in #3208.
+   * Simplify a bounds check in ssl_write_certificate_request(). Contributed
+     by irwir in #3150.
+   * Unify the example programs termination to call mbedtls_exit() instead of
+     using a return command. This has been done to enable customization of the
+     behavior in bare metal environments.
+   * Fix mbedtls_x509_dn_gets to escape non-ASCII characters as "?".
+     Contributed by Koh M. Nakagawa in #3326.
+   * Use FindPython3 when cmake version >= 3.15.0
+   * Abort the ClientHello writing function as soon as some extension doesn't
+     fit into the record buffer. Previously, such extensions were silently
+     dropped. As a consequence, the TLS handshake now fails when the output
+     buffer is not large enough to hold the ClientHello.
+   * The unit tests now rely on header files in tests/include/test and source
+     files in tests/src. When building with make or cmake, the files in
+     tests/src are compiled and the resulting object linked into each test
+     executable.
+   * The ECP module, enabled by `MBEDTLS_ECP_C`, now depends on
+     `MBEDTLS_CTR_DRBG_C` or `MBEDTLS_HMAC_DRBG_C` for some side-channel
+     coutermeasures. If side channels are not a concern, this dependency can
+     be avoided by enabling the new option `MBEDTLS_ECP_NO_INTERNAL_RNG`.
+   * Align MSVC error flag with GCC and Clang. Contributed by Carlos Gomes
+     Martinho. #3147
+   * Remove superfluous assignment in mbedtls_ssl_parse_certificate(). Reported
+     in #3182 and fix submitted by irwir. #3217
+   * Fix typo in XTS tests. Reported and fix submitted by Kxuan. #3319
+
+= mbed TLS 2.22.0 branch released 2020-04-14
+
+New deprecations
+   * Deprecate MBEDTLS_SSL_HW_RECORD_ACCEL that enables function hooks in the
+     SSL module for hardware acceleration of individual records.
+   * Deprecate mbedtls_ssl_get_max_frag_len() in favour of
+     mbedtls_ssl_get_output_max_frag_len() and
+     mbedtls_ssl_get_input_max_frag_len() to be more precise about which max
+     fragment length is desired.
+
+Security
+   * Fix issue in DTLS handling of new associations with the same parameters
+     (RFC 6347 section 4.2.8): an attacker able to send forged UDP packets to
+     the server could cause it to drop established associations with
+     legitimate clients, resulting in a Denial of Service. This could only
+     happen when MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE was enabled in config.h
+     (which it is by default).
+   * Fix side channel in ECC code that allowed an adversary with access to
+     precise enough timing and memory access information (typically an
+     untrusted operating system attacking a secure enclave) to fully recover
+     an ECDSA private key. Found and reported by Alejandro Cabrera Aldaya,
+     Billy Brumley and Cesar Pereida Garcia. CVE-2020-10932
+   * Fix a potentially remotely exploitable buffer overread in a
+     DTLS client when parsing the Hello Verify Request message.
+
+Features
+   * The new build option MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH automatically
+     resizes the I/O buffers before and after handshakes, reducing the memory
+     consumption during application data transfer.
+
+Bugfix
+   * Fix compilation failure when both MBEDTLS_SSL_PROTO_DTLS and
+     MBEDTLS_SSL_HW_RECORD_ACCEL are enabled.
+   * Remove a spurious check in ssl_parse_client_psk_identity that triggered
+     a warning with some compilers. Fix contributed by irwir in #2856.
+   * Fix a function name in a debug message. Contributed by Ercan Ozturk in
+     #3013.
+
+Changes
+   * Mbed Crypto is no longer a Git submodule. The crypto part of the library
+     is back directly in the present repository.
+   * Split mbedtls_ssl_get_max_frag_len() into
+     mbedtls_ssl_get_output_max_frag_len() and
+     mbedtls_ssl_get_input_max_frag_len() to ensure that a sufficient input
+     buffer is allocated by the server (if MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
+     is defined), regardless of what MFL was configured for it.
+
+= mbed TLS 2.21.0 branch released 2020-02-20
+
+New deprecations
+   * Deprecate MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO that enables parsing
+     SSLv2 ClientHello messages.
+   * Deprecate MBEDTLS_SSL_PROTO_SSL3 that enables support for SSLv3.
+   * Deprecate for MBEDTLS_PKCS11_C, the wrapper around the pkcs11-helper
+     library which allows TLS authentication to use keys stored in a
+     PKCS#11 token such as a smartcard.
+
+Security
+   * Fix potential memory overread when performing an ECDSA signature
+     operation. The overread only happens with cryptographically low
+     probability (of the order of 2^-n where n is the bitsize of the curve)
+     unless the RNG is broken, and could result in information disclosure or
+     denial of service (application crash or extra resource consumption).
+     Found by Auke Zeilstra and Peter Schwabe, using static analysis.
+   * To avoid a side channel vulnerability when parsing an RSA private key,
+     read all the CRT parameters from the DER structure rather than
+     reconstructing them. Found by Alejandro Cabrera Aldaya and Billy Bob
+     Brumley. Reported and fix contributed by Jack Lloyd.
+     ARMmbed/mbed-crypto#352
+
+Features
+   * The new build option MBEDTLS_SHA512_NO_SHA384 allows building SHA-512
+     support without SHA-384.
+
+API changes
+   * Change the encoding of key types and curves in the PSA API. The new
+     values are aligned with the upcoming release of the PSA Crypto API
+     specification version 1.0.0. The main change which may break some
+     existing code is that elliptic curve key types no longer encode the
+     exact curve: a psa_ecc_curve_t or psa_key_type_t value only encodes
+     a curve family and the key size determines the exact curve (for example,
+     PSA_ECC_CURVE_SECP_R1 with 256 bits is P256R1). ARMmbed/mbed-crypto#330
+
+Bugfix
+   * Fix an unchecked call to mbedtls_md() in the x509write module.
+   * Fix build failure with MBEDTLS_ZLIB_SUPPORT enabled. Reported by
+     Jack Lloyd in #2859. Fix submitted by jiblime in #2963.
+   * Fix some false-positive uninitialized variable warnings in X.509. Fix
+     contributed by apple-ihack-geek in #2663.
+   * Fix a possible error code mangling in psa_mac_verify_finish() when
+     a cryptographic accelerator fails. ARMmbed/mbed-crypto#345
+   * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some
+     RSA keys that would later be rejected by functions expecting private
+     keys. Found by Catena cyber using oss-fuzz (issue 20467).
+   * Fix a bug in mbedtls_pk_parse_key() that would cause it to
+     accept some RSA keys with invalid values by silently fixing those values.
+
+= mbed TLS 2.20.0 branch released 2020-01-15
+
+Default behavior changes
+   * The initial seeding of a CTR_DRBG instance makes a second call to the
+     entropy function to obtain entropy for a nonce if the entropy size is less
+     than 3/2 times the key size. In case you want to disable the extra call to
+     grab entropy, you can call mbedtls_ctr_drbg_set_nonce_len() to force the
+     nonce length to 0.
+
+Security
+   * Enforce that mbedtls_entropy_func() gathers a total of
+     MBEDTLS_ENTROPY_BLOCK_SIZE bytes or more from strong sources. In the
+     default configuration, on a platform with a single entropy source, the
+     entropy module formerly only grabbed 32 bytes, which is good enough for
+     security if the source is genuinely strong, but less than the expected 64
+     bytes (size of the entropy accumulator).
+   * Zeroize local variables in mbedtls_internal_aes_encrypt() and
+     mbedtls_internal_aes_decrypt() before exiting the function. The value of
+     these variables can be used to recover the last round key. To follow best
+     practice and to limit the impact of buffer overread vulnerabilities (like
+     Heartbleed) we need to zeroize them before exiting the function.
+     Issue reported by Tuba Yavuz, Farhaan Fowze, Ken (Yihang) Bai,
+     Grant Hernandez, and Kevin Butler (University of Florida) and
+     Dave Tian (Purdue University).
+   * Fix side channel vulnerability in ECDSA. Our bignum implementation is not
+     constant time/constant trace, so side channel attacks can retrieve the
+     blinded value, factor it (as it is smaller than RSA keys and not guaranteed
+     to have only large prime factors), and then, by brute force, recover the
+     key. Reported by Alejandro Cabrera Aldaya and Billy Brumley.
+   * Fix side channel vulnerability in ECDSA key generation. Obtaining precise
+     timings on the comparison in the key generation enabled the attacker to
+     learn leading bits of the ephemeral key used during ECDSA signatures and to
+     recover the private key. Reported by Jeremy Dubeuf.
+   * Catch failure of AES functions in mbedtls_ctr_drbg_random(). Uncaught
+     failures could happen with alternative implementations of AES. Bug
+     reported and fix proposed by Johan Uppman Bruce and Christoffer Lauri,
+     Sectra.
+
+Features
+   * Key derivation inputs in the PSA API can now either come from a key object
+     or from a buffer regardless of the step type.
+   * The CTR_DRBG module can grab a nonce from the entropy source during the
+     initial seeding. The default nonce length is chosen based on the key size
+     to achieve the security strength defined by NIST SP 800-90A. You can
+     change it with mbedtls_ctr_drbg_set_nonce_len().
+   * Add ENUMERATED tag support to the ASN.1 module. Contributed by
+     msopiha-linaro in ARMmbed/mbed-crypto#307.
+
+API changes
+   * In the PSA API, forbid zero-length keys. To pass a zero-length input to a
+     key derivation function, use a buffer instead (this is now always
+     possible).
+   * Rename psa_asymmetric_sign() to psa_sign_hash() and
+     psa_asymmetric_verify() to psa_verify_hash().
+
+Bugfix
+   * Fix an incorrect size in a debugging message. Reported and fix
+     submitted by irwir. Fixes #2717.
+   * Fix an unused variable warning when compiling without DTLS.
+     Reported and fix submitted by irwir. Fixes #2800.
+   * Remove a useless assignment. Reported and fix submitted by irwir.
+     Fixes #2801.
+   * Fix a buffer overflow in the PSA HMAC code when using a long key with an
+     unsupported algorithm. Fixes ARMmbed/mbed-crypto#254.
+   * Fix mbedtls_asn1_get_int to support any number of leading zeros. Credit
+     to OSS-Fuzz for finding a bug in an intermediate version of the fix.
+   * Fix mbedtls_asn1_get_bitstring_null to correctly parse bitstrings of at
+     most 2 bytes.
+   * mbedtls_ctr_drbg_set_entropy_len() and
+     mbedtls_hmac_drbg_set_entropy_len() now work if you call them before
+     mbedtls_ctr_drbg_seed() or mbedtls_hmac_drbg_seed().
+
+Changes
+   * Remove the technical possibility to define custom mbedtls_md_info
+     structures, which was exposed only in an internal header.
+   * psa_close_key(0) and psa_destroy_key(0) now succeed (doing nothing, as
+     before).
+   * Variables containing error codes are now initialized to an error code
+     rather than success, so that coding mistakes or memory corruption tends to
+     cause functions to return this error code rather than a success. There are
+     no known instances where this changes the behavior of the library: this is
+     merely a robustness improvement. ARMmbed/mbed-crypto#323
+   * Remove a useless call to mbedtls_ecp_group_free(). Contributed by
+     Alexander Krizhanovsky in ARMmbed/mbed-crypto#210.
+   * Speed up PBKDF2 by caching the digest calculation. Contributed by Jack
+     Lloyd and Fortanix Inc in ARMmbed/mbed-crypto#277.
+   * Small performance improvement of mbedtls_mpi_div_mpi(). Contributed by
+     Alexander Krizhanovsky in ARMmbed/mbed-crypto#308.
+
+= mbed TLS 2.19.1 branch released 2019-09-16
+
+Features
+   * Declare include headers as PUBLIC to propagate to CMake project consumers
+     Contributed by Zachary J. Fields in PR #2949.
+   * Add nss_keylog to ssl_client2 and ssl_server2, enabling easier analysis of
+     TLS sessions with tools like Wireshark.
+
+API Changes
+   * Make client_random and server_random const in
+     mbedtls_ssl_export_keys_ext_t, so that the key exporter is discouraged
+     from modifying the client/server hello.
+
+Bugfix
+   * Fix some false-positive uninitialized variable warnings in crypto. Fix
+     contributed by apple-ihack-geek in #2663.
+
+= mbed TLS 2.19.0 branch released 2019-09-06
+
+Security
+   * Fix a missing error detection in ECJPAKE. This could have caused a
+     predictable shared secret if a hardware accelerator failed and the other
+     side of the key exchange had a similar bug.
+   * When writing a private EC key, use a constant size for the private
+     value, as specified in RFC 5915. Previously, the value was written
+     as an ASN.1 INTEGER, which caused the size of the key to leak
+     about 1 bit of information on average and could cause the value to be
+     1 byte too large for the output buffer.
+   * The deterministic ECDSA calculation reused the scheme's HMAC-DRBG to
+     implement blinding. Because of this for the same key and message the same
+     blinding value was generated. This reduced the effectiveness of the
+     countermeasure and leaked information about the private key through side
+     channels. Reported by Jack Lloyd.
+
+Features
+   * Add new API functions mbedtls_ssl_session_save() and
+     mbedtls_ssl_session_load() to allow serializing a session, for example to
+     store it in non-volatile storage, and later using it for TLS session
+     resumption.
+   * Add a new API function mbedtls_ssl_check_record() to allow checking that
+     an incoming record is valid, authentic and has not been seen before. This
+     feature can be used alongside Connection ID and SSL context serialisation.
+     The feature is enabled at compile-time by MBEDTLS_SSL_RECORD_CHECKING
+     option.
+   * New implementation of X25519 (ECDH using Curve25519) from Project Everest
+     (https://project-everest.github.io/). It can be enabled at compile time
+     with MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED. This implementation is formally
+     verified and significantly faster, but is only supported on x86 platforms
+     (32-bit and 64-bit) using GCC, Clang or Visual Studio. Contributed by
+     Christoph Wintersteiger from Microsoft Research.
+   * Add mbedtls_net_close(), enabling the building of forking servers where
+     the parent process closes the client socket and continue accepting, and
+     the child process closes the listening socket and handles the client
+     socket. Contributed by Robert Larsen in #2803.
+
+API Changes
+   * Add DER-encoded test CRTs to library/certs.c, allowing
+     the example programs ssl_server2 and ssl_client2 to be run
+     if MBEDTLS_FS_IO and MBEDTLS_PEM_PARSE_C are unset. Fixes #2254.
+   * The HAVEGE state type now uses uint32_t elements instead of int.
+   * The functions mbedtls_ecp_curve_list() and mbedtls_ecp_grp_id_list() now
+     list all curves for which at least one of ECDH or ECDSA is supported, not
+     just curves for which both are supported. Call mbedtls_ecdsa_can_do() or
+     mbedtls_ecdh_can_do() on each result to check whether each algorithm is
+     supported.
+   * The new function mbedtls_ecdsa_sign_det_ext() is similar to
+     mbedtls_ecdsa_sign_det() but allows passing an external RNG for the
+     purpose of blinding.
+
+New deprecations
+   * Deprecate mbedtls_ecdsa_sign_det() in favor of a functions that can take an
+     RNG function as an input.
+   * Calling mbedtls_ecdsa_write_signature() with NULL as the f_rng argument
+     is now deprecated.
+
+Bugfix
+   * Fix missing bounds checks in X.509 parsing functions that could
+     lead to successful parsing of ill-formed X.509 CRTs. Fixes #2437.
+   * Fix multiple X.509 functions previously returning ASN.1 low-level error
+     codes to always wrap these codes into X.509 high level error codes before
+     returning. Fixes #2431.
+   * Fix to allow building test suites with any warning that detects unused
+     functions. Fixes #1628.
+   * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture.
+   * Remove redundant include file in timing.c. Fixes #2640 reported by irwir.
+   * Fix build failure when building with mingw on Windows by including
+     stdarg.h where needed. Fixes #2656.
+   * Fix Visual Studio Release x64 build configuration by inheriting
+     PlatformToolset from the project configuration. Fixes #1430 reported by
+     irwir.
+   * Enable Suite B with subset of ECP curves. Make sure the code compiles even
+     if some curves are not defined. Fixes #1591 reported by dbedev.
+   * Fix misuse of signed arithmetic in the HAVEGE module. #2598
+   * Avoid use of statically sized stack buffers for certificate writing.
+     This previously limited the maximum size of DER encoded certificates
+     in mbedtls_x509write_crt_der() to 2Kb. Reported by soccerGB in #2631.
+   * Fix partial zeroing in x509_get_other_name. Found and fixed by ekse, #2716.
+   * Update test certificates that were about to expire. Reported by
+     Bernhard M. Wiedemann in #2357.
+   * Fix the build on ARMv5TE in ARM mode to not use assembly instructions
+     that are only available in Thumb mode. Fix contributed by Aurelien Jarno
+     in #2169.
+   * Fix propagation of restart contexts in restartable EC operations.
+     This could previously lead to segmentation faults in builds using an
+     address-sanitizer and enabling but not using MBEDTLS_ECP_RESTARTABLE.
+   * Fix memory leak in in mpi_miller_rabin(). Contributed by
+     Jens Wiklander <[email protected]> in #2363
+   * Improve code clarity in x509_crt module, removing false-positive
+     uninitialized variable warnings on some recent toolchains (GCC8, etc).
+     Discovered and fixed by Andy Gross (Linaro), #2392.
+   * Fix bug in endianness conversion in bignum module. This lead to
+     functionally incorrect code on bigendian systems which don't have
+     __BYTE_ORDER__ defined. Reported by Brendan Shanks. Fixes #2622.
+
+Changes
+   * Replace multiple uses of MD2 by SHA-256 in X.509 test suite. Fixes #821.
+   * Make it easier to define MBEDTLS_PARAM_FAILED as assert (which config.h
+     suggests). #2671
+   * Make `make clean` clean all programs always. Fixes #1862.
+   * Add a Dockerfile and helper scripts (all-in-docker.sh, basic-in-docker.sh,
+     docker-env.sh) to simplify running test suites on a Linux host. Contributed
+     by Peter Kolbus (Garmin).
+   * Add `reproducible` option to `ssl_client2` and `ssl_server2` to enable
+     test runs without variability. Contributed by Philippe Antoine (Catena
+     cyber) in #2681.
+   * Extended .gitignore to ignore Visual Studio artifacts. Fixed by ConfusedSushi.
+   * Adds fuzz targets, especially for continuous fuzzing with OSS-Fuzz.
+     Contributed by Philippe Antoine (Catena cyber).
+   * Remove the crypto part of the library from Mbed TLS. The crypto
+     code and tests are now only available via Mbed Crypto, which
+     Mbed TLS references as a Git submodule.
+
+= mbed TLS 2.18.1 branch released 2019-07-12
+
+Bugfix
+   * Fix build failure when building with mingw on Windows by including
+     stdarg.h where needed. Fixes #2656.
+
+Changes
+   * Enable building of Mbed TLS as a CMake subproject. Suggested and fixed by
+     Ashley Duncan in #2609.
+
+= mbed TLS 2.18.0 branch released 2019-06-11
+
+Features
+   * Add the Any Policy certificate policy oid, as defined in
+     rfc 5280 section 4.2.1.4.
+   * It is now possible to use NIST key wrap mode via the mbedtls_cipher API.
+     Contributed by Jack Lloyd and Fortanix Inc.
+   * Add the Wi-SUN Field Area Network (FAN) device extended key usage.
+   * Add the oid certificate policy x509 extension.
+   * It is now possible to perform RSA PKCS v1.5 signatures with RIPEMD-160 digest.
+     Contributed by Jack Lloyd and Fortanix Inc.
+   * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes,
+     and the used tls-prf.
+   * Add public API for tls-prf function, according to requested enum.
+   * Add support for parsing otherName entries in the Subject Alternative Name
+     X.509 certificate extension, specifically type hardware module name,
+     as defined in RFC 4108 section 5.
+   * Add support for parsing certificate policies extension, as defined in
+     RFC 5280 section 4.2.1.4. Currently, only the "Any Policy" policy is
+     supported.
+   * List all SAN types in the subject_alt_names field of the certificate.
+     Resolves #459.
+   * Add support for draft-05 of the Connection ID extension, as specified
+     in https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05.
+     The Connection ID extension allows to keep DTLS connections beyond the
+     lifetime of the underlying transport by adding a connection identifier
+     to the DTLS record header. This identifier can be used to associated an
+     incoming record with the correct connection data even after the peer has
+     changed its IP or port. The feature is enabled at compile-time by setting
+     MBEDTLS_SSL_DTLS_CONNECTION_ID (disabled by default), and at run-time
+     through the new APIs mbedtls_ssl_conf_cid() and mbedtls_ssl_set_cid().
+
+
+API Changes
+   * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes,
+     and the used tls-prf.
+   * Add public API for tls-prf function, according to requested enum.
+
+Bugfix
+   * Fix private key DER output in the key_app_writer example. File contents
+     were shifted by one byte, creating an invalid ASN.1 tag. Fixed by
+     Christian Walther in #2239.
+   * Fix potential memory leak in X.509 self test. Found and fixed by
+     Junhwan Park, #2106.
+   * Reduce stack usage of hkdf tests. Fixes #2195.
+   * Fix 1-byte buffer overflow in mbedtls_mpi_write_string() when
+     used with negative inputs. Found by Guido Vranken in #2404. Credit to
+     OSS-Fuzz.
+   * Fix bugs in the AEAD test suite which would be exposed by ciphers which
+     either used both encrypt and decrypt key schedules, or which perform padding.
+     GCM and CCM were not affected. Fixed by Jack Lloyd.
+   * Fix incorrect default port number in ssl_mail_client example's usage.
+     Found and fixed by irwir. #2337
+   * Add psa_util.h to test/cpp_dummy_build to fix build_default_make_gcc_and_cxx.
+     Fixed by Peter Kolbus (Garmin). #2579
+   * Add missing parentheses around parameters in the definition of the
+     public macro MBEDTLS_X509_ID_FLAG. This could lead to invalid evaluation
+     in case operators binding less strongly than subtraction were used
+     for the parameter.
+   * Add a check for MBEDTLS_X509_CRL_PARSE_C in ssl_server2, guarding the crl
+     sni entry parameter. Reported by inestlerode in #560.
+   * Set the next sequence of the subject_alt_name to NULL when deleting
+     sequence on failure. Found and fix suggested by Philippe Antoine.
+     Credit to OSS-Fuzz.
+
+Changes
+   * Server's RSA certificate in certs.c was SHA-1 signed. In the default
+     mbedTLS configuration only SHA-2 signed certificates are accepted.
+     This certificate is used in the demo server programs, which lead the
+     client programs to fail at the peer's certificate verification
+     due to an unacceptable hash signature. The certificate has been
+     updated to one that is SHA-256 signed. Fix contributed by
+     Illya Gerasymchuk.
+   * Return from various debugging routines immediately if the
+     provided SSL context is unset.
+   * Remove dead code from bignum.c in the default configuration.
+     Found by Coverity, reported and fixed by Peter Kolbus (Garmin). Fixes #2309.
+   * Add test for minimal value of MBEDTLS_MPI_WINDOW_SIZE to all.sh.
+     Contributed by Peter Kolbus (Garmin).
+   * Change wording in the `mbedtls_ssl_conf_max_frag_len()`'s documentation to
+     improve clarity. Fixes #2258.
+
+= mbed TLS 2.17.0 branch released 2019-03-19
+
+Features
+   * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()`
+     which allows copy-less parsing of DER encoded X.509 CRTs,
+     at the cost of additional lifetime constraints on the input
+     buffer, but at the benefit of reduced RAM consumption.
+   * Add a new function mbedtls_asn1_write_named_bitstring() to write ASN.1
+     named bitstring in DER as required by RFC 5280 Appendix B.
+   * Add MBEDTLS_REMOVE_3DES_CIPHERSUITES to allow removing 3DES ciphersuites
+     from the default list (enabled by default). See
+     https://sweet32.info/SWEET32_CCS16.pdf.
+
+API Changes
+   * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()`.
+     See the Features section for more information.
+   * Allow to opt in to the removal the API mbedtls_ssl_get_peer_cert()
+     for the benefit of saving RAM, by disabling the new compile-time
+     option MBEDTLS_SSL_KEEP_PEER_CERTIFICATE (enabled by default for
+     API stability). Disabling this option makes mbedtls_ssl_get_peer_cert()
+     always return NULL, and removes the peer_cert field from the
+     mbedtls_ssl_session structure which otherwise stores the peer's
+     certificate.
+
+Security
+   * Make mbedtls_ecdh_get_params return an error if the second key
+     belongs to a different group from the first. Before, if an application
+     passed keys that belonged to different group, the first key's data was
+     interpreted according to the second group, which could lead to either
+     an error or a meaningless output from mbedtls_ecdh_get_params. In the
+     latter case, this could expose at most 5 bits of the private key.
+
+Bugfix
+   * Fix a compilation issue with mbedtls_ecp_restart_ctx not being defined
+     when MBEDTLS_ECP_ALT is defined. Reported by jwhui. Fixes #2242.
+   * Run the AD too long test only if MBEDTLS_CCM_ALT is not defined.
+     Raised as a comment in #1996.
+   * Reduce the stack consumption of mbedtls_mpi_fill_random() which could
+     previously lead to a stack overflow on constrained targets.
+   * Add `MBEDTLS_SELF_TEST` for the mbedtls_self_test functions
+     in the header files, which missed the precompilation check. #971
+   * Fix returning the value 1 when mbedtls_ecdsa_genkey failed.
+   * Remove a duplicate #include in a sample program. Fixed by Masashi Honma #2326.
+   * Remove the mbedtls namespacing from the header file, to fix a "file not found"
+     build error. Fixed by Haijun Gu #2319.
+   * Fix signed-to-unsigned integer conversion warning
+     in X.509 module. Fixes #2212.
+   * Reduce stack usage of `mpi_write_hlp()` by eliminating recursion.
+     Fixes #2190.
+   * Fix false failure in all.sh when backup files exist in include/mbedtls
+     (e.g. config.h.bak). Fixed by Peter Kolbus (Garmin) #2407.
+   * Ensure that unused bits are zero when writing ASN.1 bitstrings when using
+     mbedtls_asn1_write_bitstring().
+   * Fix issue when writing the named bitstrings in KeyUsage and NsCertType
+     extensions in CSRs and CRTs that caused these bitstrings to not be encoded
+     correctly as trailing zeroes were not accounted for as unused bits in the
+     leading content octet. Fixes #1610.
+
+Changes
+   * Reduce RAM consumption during session renegotiation by not storing
+     the peer CRT chain and session ticket twice.
+   * Include configuration file in all header files that use configuration,
+     instead of relying on other header files that they include.
+     Inserted as an enhancement for #1371
+   * Add support for alternative CSR headers, as used by Microsoft and defined
+     in RFC 7468. Found by Michael Ernst. Fixes #767.
+   * Correct many misspellings. Fixed by MisterDA #2371.
+   * Provide an abstraction of vsnprintf to allow alternative implementations
+     for platforms that don't provide it. Based on contributions by Joris Aerts
+     and Nathaniel Wesley Filardo.
+   * Fix clobber list in MIPS assembly for large integer multiplication.
+     Previously, this could lead to functionally incorrect assembly being
+     produced by some optimizing compilers, showing up as failures in
+     e.g. RSA or ECC signature operations. Reported in #1722, fix suggested
+     by Aurelien Jarno and submitted by Jeffrey Martin.
+   * Reduce the complexity of the timing tests. They were assuming more than the
+     underlying OS actually guarantees.
+   * Fix configuration queries in ssl-opt.h. #2030
+   * Ensure that ssl-opt.h can be run in OS X. #2029
+   * Re-enable certain interoperability tests in ssl-opt.sh which had previously
+     been disabled for lack of a sufficiently recent version of GnuTLS on the CI.
+   * Ciphersuites based on 3DES now have the lowest priority by default when
+     they are enabled.
+
+= mbed TLS 2.16.0 branch released 2018-12-21
+
+Features
+   * Add a new config.h option of MBEDTLS_CHECK_PARAMS that enables validation
+     of parameters in the API. This allows detection of obvious misuses of the
+     API, such as passing NULL pointers. The API of existing functions hasn't
+     changed, but requirements on parameters have been made more explicit in
+     the documentation. See the corresponding API documentation for each
+     function to see for which parameter values it is defined. This feature is
+     disabled by default. See its API documentation in config.h for additional
+     steps you have to take when enabling it.
+
+API Changes
+   * The following functions in the random generator modules have been
+     deprecated and replaced as shown below. The new functions change
+     the return type from void to int to allow returning error codes when
+     using MBEDTLS_<MODULE>_ALT for the underlying AES or message digest
+     primitive. Fixes #1798.
+     mbedtls_ctr_drbg_update() -> mbedtls_ctr_drbg_update_ret()
+     mbedtls_hmac_drbg_update() -> mbedtls_hmac_drbg_update_ret()
+   * Extend ECDH interface to enable alternative implementations.
+   * Deprecate error codes of the form MBEDTLS_ERR_xxx_INVALID_KEY_LENGTH for
+     ARIA, CAMELLIA and Blowfish. These error codes will be replaced by
+     the more generic per-module error codes MBEDTLS_ERR_xxx_BAD_INPUT_DATA.
+   * Additional parameter validation checks have been added for the following
+     modules - AES, ARIA, Blowfish, CAMELLIA, CCM, GCM, DHM, ECP, ECDSA, ECDH,
+     ECJPAKE, SHA, Chacha20 and Poly1305, cipher, pk, RSA, and MPI.
+     Where modules have had parameter validation added, existing parameter
+     checks may have changed. Some modules, such as Chacha20 had existing
+     parameter validation whereas other modules had little. This has now been
+     changed so that the same level of validation is present in all modules, and
+     that it is now optional with the MBEDTLS_CHECK_PARAMS flag which by default
+     is off. That means that checks which were previously present by default
+     will no longer be.
+
+New deprecations
+   * Deprecate mbedtls_ctr_drbg_update and mbedtls_hmac_drbg_update
+     in favor of functions that can return an error code.
+
+Bugfix
+   * Fix for Clang, which was reporting a warning for the bignum.c inline
+     assembly for AMD64 targets creating string literals greater than those
+     permitted by the ISO C99 standard. Found by Aaron Jones. Fixes #482.
+   * Fix runtime error in `mbedtls_platform_entropy_poll()` when run
+     through qemu user emulation. Reported and fix suggested by randombit
+     in #1212. Fixes #1212.
+   * Fix an unsafe bounds check when restoring an SSL session from a ticket.
+     This could lead to a buffer overflow, but only in case ticket authentication
+     was broken. Reported and fix suggested by Guido Vranken in #659.
+   * Add explicit integer to enumeration type casts to example program
+     programs/pkey/gen_key which previously led to compilation failure
+     on some toolchains. Reported by phoenixmcallister. Fixes #2170.
+   * Fix double initialization of ECC hardware that made some accelerators
+     hang.
+   * Clarify documentation of mbedtls_ssl_set_own_cert() regarding the absence
+     of check for certificate/key matching. Reported by Attila Molnar, #507.
+
+ = mbed TLS 2.15.1 branch released 2018-11-30
+
+ Changes
+    * Update the Mbed Crypto submodule to version 0.1.0b2.
+
+ = mbed TLS 2.15.0 branch released 2018-11-23
+
+ Features
+    * Add an experimental build option, USE_CRYPTO_SUBMODULE, to enable use of
+      Mbed Crypto as the source of the cryptography implementation.
+    * Add an experimental configuration option, MBEDTLS_PSA_CRYPTO_C, to enable
+      the PSA Crypto API from Mbed Crypto when additionally used with the
+      USE_CRYPTO_SUBMODULE build option.
+
+ Changes
+    * Add unit tests for AES-GCM when called through mbedtls_cipher_auth_xxx()
+      from the cipher abstraction layer. Fixes #2198.
+
+= mbed TLS 2.14.1 branch released 2018-11-30
+
+Security
+   * Fix timing variations and memory access variations in RSA PKCS#1 v1.5
+     decryption that could lead to a Bleichenbacher-style padding oracle
+     attack. In TLS, this affects servers that accept ciphersuites based on
+     RSA decryption (i.e. ciphersuites whose name contains RSA but not
+     (EC)DH(E)). Discovered by Eyal Ronen (Weizmann Institute),  Robert Gillham
+     (University of Adelaide), Daniel Genkin (University of Michigan),
+     Adi Shamir (Weizmann Institute), David Wong (NCC Group), and Yuval Yarom
+     (University of Adelaide, Data61). The attack is described in more detail
+     in the paper available here: http://cat.eyalro.net/cat.pdf  CVE-2018-19608
+   * In mbedtls_mpi_write_binary(), don't leak the exact size of the number
+     via branching and memory access patterns. An attacker who could submit
+     a plaintext for RSA PKCS#1 v1.5 decryption but only observe the timing
+     of the decryption and not its result could nonetheless decrypt RSA
+     plaintexts and forge RSA signatures. Other asymmetric algorithms may
+     have been similarly vulnerable. Reported by Eyal Ronen, Robert Gillham,
+     Daniel Genkin, Adi Shamir, David Wong and Yuval Yarom.
+   * Wipe sensitive buffers on the stack in the CTR_DRBG and HMAC_DRBG
+     modules.
+
+API Changes
+   * The new functions mbedtls_ctr_drbg_update_ret() and
+     mbedtls_hmac_drbg_update_ret() are similar to mbedtls_ctr_drbg_update()
+     and mbedtls_hmac_drbg_update() respectively, but the new functions
+     report errors whereas the old functions return void. We recommend that
+     applications use the new functions.
+
+= mbed TLS 2.14.0 branch released 2018-11-19
+
+Security
+   * Fix overly strict DN comparison when looking for CRLs belonging to a
+     particular CA. This previously led to ignoring CRLs when the CRL's issuer
+     name and the CA's subject name differed in their string encoding (e.g.,
+     one using PrintableString and the other UTF8String) or in the choice of
+     upper and lower case. Reported by Henrik Andersson of Bosch GmbH in issue
+     #1784.
+   * Fix a flawed bounds check in server PSK hint parsing. In case the
+     incoming message buffer was placed within the first 64KiB of address
+     space and a PSK-(EC)DHE ciphersuite was used, this allowed an attacker
+     to trigger a memory access up to 64KiB beyond the incoming message buffer,
+     potentially leading to an application crash or information disclosure.
+   * Fix mbedtls_mpi_is_prime() to use more rounds of probabilistic testing. The
+     previous settings for the number of rounds made it practical for an
+     adversary to construct non-primes that would be erroneously accepted as
+     primes with high probability. This does not have an impact on the
+     security of TLS, but can matter in other contexts with numbers chosen
+     potentially by an adversary that should be prime and can be validated.
+     For example, the number of rounds was enough to securely generate RSA key
+     pairs or Diffie-Hellman parameters, but was insufficient to validate
+     Diffie-Hellman parameters properly.
+     See "Prime and Prejudice" by by Martin R. Albrecht and Jake Massimo and
+     Kenneth G. Paterson and Juraj Somorovsky.
+
+Features
+   * Add support for temporarily suspending expensive ECC computations after
+     some configurable amount of operations. This is intended to be used in
+     constrained, single-threaded systems where ECC is time consuming and can
+     block other operations until they complete. This is disabled by default,
+     but can be enabled by MBEDTLS_ECP_RESTARTABLE at compile time and
+     configured by mbedtls_ecp_set_max_ops() at runtime. It applies to the new
+     xxx_restartable functions in ECP, ECDSA, PK and X.509 (CRL not supported
+     yet), and to existing functions in ECDH and SSL (currently only
+     implemented client-side, for ECDHE-ECDSA ciphersuites in TLS 1.2,
+     including client authentication).
+   * Add support for Arm CPU DSP extensions to accelerate asymmetric key
+     operations. On CPUs where the extensions are available, they can accelerate
+     MPI multiplications used in ECC and RSA cryptography. Contributed by
+     Aurelien Jarno.
+   * Extend RSASSA-PSS signature to allow a smaller salt size. Previously, PSS
+     signature always used a salt with the same length as the hash, and returned
+     an error if this was not possible. Now the salt size may be up to two bytes
+     shorter. This allows the library to support all hash and signature sizes
+     that comply with FIPS 186-4, including SHA-512 with a 1024-bit key.
+   * Add support for 128-bit keys in CTR_DRBG. Note that using keys shorter
+     than 256 bits limits the security of generated material to 128 bits.
+
+API Changes
+   * Add a common error code of `MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED` for
+     a feature that is not supported by underlying alternative
+     implementations implementing cryptographic primitives. This is useful for
+     hardware accelerators that don't implement all options or features.
+
+New deprecations
+   * All module specific errors following the form
+     MBEDTLS_ERR_XXX_FEATURE_UNAVAILABLE that indicate a feature is not
+     supported are deprecated and are now replaced by the new equivalent
+     platform error.
+   * All module specific generic hardware acceleration errors following the
+     form MBEDTLS_ERR_XXX_HW_ACCEL_FAILED that are deprecated and are replaced
+     by the equivalent plaform error.
+   * Deprecate the function mbedtls_mpi_is_prime() in favor of
+     mbedtls_mpi_is_prime_ext() which allows specifying the number of
+     Miller-Rabin rounds.
+
+Bugfix
+   * Fix wrong order of freeing in programs/ssl/ssl_server2 example
+     application leading to a memory leak in case both
+     MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE are set.
+     Fixes #2069.
+   * Fix a bug in the update function for SSL ticket keys which previously
+     invalidated keys of a lifetime of less than a 1s. Fixes #1968.
+   * Fix failure in hmac_drbg in the benchmark sample application, when
+     MBEDTLS_THREADING_C is defined. Found by TrinityTonic, #1095
+   * Fix a bug in the record decryption routine ssl_decrypt_buf()
+     which lead to accepting properly authenticated but improperly
+     padded records in case of CBC ciphersuites using Encrypt-then-MAC.
+   * Fix memory leak and freeing without initialization in the example
+     program programs/x509/cert_write. Fixes #1422.
+   * Ignore IV in mbedtls_cipher_set_iv() when the cipher mode is
+     MBEDTLS_MODE_ECB. Found by ezdevelop. Fixes #1091.
+   * Zeroize memory used for buffering or reassembling handshake messages
+     after use.
+   * Use `mbedtls_platform_zeroize()` instead of `memset()` for zeroization
+     of sensitive data in the example programs aescrypt2 and crypt_and_hash.
+   * Change the default string format used for various X.509 DN attributes to
+     UTF8String. Previously, the use of the PrintableString format led to
+     wildcards and non-ASCII characters being unusable in some DN attributes.
+     Reported by raprepo in #1860 and by kevinpt in #468. Fix contributed by
+     Thomas-Dee.
+   * Fix compilation failure for configurations which use compile time
+     replacements of standard calloc/free functions through the macros
+     MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO.
+     Reported by ole-de and ddhome2006. Fixes #882, #1642 and #1706.
+
+Changes
+   * Removed support for Yotta as a build tool.
+   * Add tests for session resumption in DTLS.
+   * Close a test gap in (D)TLS between the client side and the server side:
+     test the handling of large packets and small packets on the client side
+     in the same way as on the server side.
+   * Change the dtls_client and dtls_server samples to work by default over
+     IPv6 and optionally by a build option over IPv4.
+   * Change the use of Windows threading to use Microsoft Visual C++ runtime
+     calls, rather than Win32 API calls directly. This is necessary to avoid
+     conflict with C runtime usage. Found and fixed by irwir.
+   * Remember the string format of X.509 DN attributes when replicating
+     X.509 DNs. Previously, DN attributes were always written in their default
+     string format (mostly PrintableString), which could lead to CRTs being
+     created which used PrintableStrings in the issuer field even though the
+     signing CA used UTF8Strings in its subject field; while X.509 compliant,
+     such CRTs were rejected in some applications, e.g. some versions of
+     Firefox, curl and GnuTLS. Reported in #1033 by Moschn. Fix contributed by
+     Thomas-Dee.
+   * Improve documentation of mbedtls_ssl_get_verify_result().
+     Fixes #517 reported by github-monoculture.
+   * Add MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR flag to mbedtls_mpi_gen_prime() and
+     use it to reduce error probability in RSA key generation to levels mandated
+     by FIPS-186-4.
+
+= mbed TLS 2.13.1 branch released 2018-09-06
+
+API Changes
+   * Extend the platform module with an abstraction mbedtls_platform_gmtime_r()
+     whose implementation should behave as a thread-safe version of gmtime().
+     This allows users to configure such an implementation at compile time when
+     the target system cannot be deduced automatically, by setting the option
+     MBEDTLS_PLATFORM_GMTIME_R_ALT. At this stage Mbed TLS is only able to
+     automatically select implementations for Windows and POSIX C libraries.
+
+Bugfix
+   * Fix build failures on platforms where only gmtime() is available but
+     neither gmtime_r() nor gmtime_s() are present. Fixes #1907.
+
+= mbed TLS 2.13.0 branch released 2018-08-31
+
+Security
+   * Fix an issue in the X.509 module which could lead to a buffer overread
+     during certificate extensions parsing. In case of receiving malformed
+     input (extensions length field equal to 0), an illegal read of one byte
+     beyond the input buffer is made. Found and analyzed by Nathan Crandall.
+
+Features
+   * Add support for fragmentation of outgoing DTLS handshake messages. This
+     is controlled by the maximum fragment length as set locally or negotiated
+     with the peer, as well as by a new per-connection MTU option, set using
+     mbedtls_ssl_set_mtu().
+   * Add support for auto-adjustment of MTU to a safe value during the
+     handshake when flights do not get through (RFC 6347, section 4.1.1.1,
+     last paragraph).
+   * Add support for packing multiple records within a single datagram,
+     enabled by default.
+   * Add support for buffering out-of-order handshake messages in DTLS.
+     The maximum amount of RAM used for this can be controlled by the
+     compile-time constant MBEDTLS_SSL_DTLS_MAX_BUFFERING defined
+     in mbedtls/config.h.
+
+API Changes
+   * Add function mbedtls_ssl_set_datagram_packing() to configure
+     the use of datagram packing (enabled by default).
+
+Bugfix
+   * Fix a potential memory leak in mbedtls_ssl_setup() function. An allocation
+     failure in the function could lead to other buffers being leaked.
+   * Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if
+     MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890
+   * Fix a memory leak in ecp_mul_comb() if ecp_precompute_comb() fails.
+     Fix contributed by Espressif Systems.
+   * Add ecc extensions only if an ecc based ciphersuite is used.
+     This improves compliance to RFC 4492, and as a result, solves
+     interoperability issues with BouncyCastle. Raised by milenamil in #1157.
+   * Replace printf with mbedtls_printf in the ARIA module. Found by
+     TrinityTonic in #1908.
+   * Fix potential use-after-free in mbedtls_ssl_get_max_frag_len()
+     and mbedtls_ssl_get_record_expansion() after a session reset. Fixes #1941.
+   * Fix a bug that caused SSL/TLS clients to incorrectly abort the handshake
+     with TLS versions 1.1 and earlier when the server requested authentication
+     without providing a list of CAs. This was due to an overly strict bounds
+     check in parsing the CertificateRequest message,
+     introduced in Mbed TLS 2.12.0. Fixes #1954.
+   * Fix a miscalculation of the maximum record expansion in
+     mbedtls_ssl_get_record_expansion() in case of ChachaPoly ciphersuites,
+     or CBC ciphersuites in (D)TLS versions 1.1 or higher. Fixes #1913, #1914.
+   * Fix undefined shifts with negative values in certificates parsing
+     (found by Catena cyber using oss-fuzz)
+   * Fix memory leak and free without initialization in pk_encrypt
+     and pk_decrypt example programs. Reported by Brace Stout. Fixes #1128.
+   * Remove redundant else statement. Raised by irwir. Fixes #1776.
+
+Changes
+   * Copy headers preserving timestamps when doing a "make install".
+     Contributed by xueruini.
+   * Allow the forward declaration of public structs. Contributed by Dawid
+     Drozd. Fixes #1215 raised by randombit.
+   * Improve compatibility with some alternative CCM implementations by using
+     CCM test vectors from RAM.
+   * Add support for buffering of out-of-order handshake messages.
+   * Add warnings to the documentation of the HKDF module to reduce the risk
+     of misusing the mbedtls_hkdf_extract() and mbedtls_hkdf_expand()
+     functions. Fixes #1775. Reported by Brian J. Murray.
+
+= mbed TLS 2.12.0 branch released 2018-07-25
+
+Security
+   * Fix a vulnerability in TLS ciphersuites based on CBC and using SHA-384,
+     in (D)TLS 1.0 to 1.2, that allowed an active network attacker to
+     partially recover the plaintext of messages under some conditions by
+     exploiting timing measurements. With DTLS, the attacker could perform
+     this recovery by sending many messages in the same connection. With TLS
+     or if mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only
+     worked if the same secret (for example a HTTP Cookie) has been repeatedly
+     sent over connections manipulated by the attacker. Connections using GCM
+     or CCM instead of CBC, using hash sizes other than SHA-384, or using
+     Encrypt-then-Mac (RFC 7366) were not affected. The vulnerability was
+     caused by a miscalculation (for SHA-384) in a countermeasure to the
+     original Lucky 13 attack. Found by Kenny Paterson, Eyal Ronen and Adi
+     Shamir.
+   * Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to
+     1.2, that allowed a local attacker, able to execute code on the local
+     machine as well as manipulate network packets, to partially recover the
+     plaintext of messages under some conditions by using a cache attack
+     targeting an internal MD/SHA buffer. With TLS or if
+     mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only worked if
+     the same secret (for example a HTTP Cookie) has been repeatedly sent over
+     connections manipulated by the attacker. Connections using GCM or CCM
+     instead of CBC or using Encrypt-then-Mac (RFC 7366) were not affected.
+     Found by Kenny Paterson, Eyal Ronen and Adi Shamir.
+   * Add a counter-measure against a vulnerability in TLS ciphersuites based
+     on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to
+     execute code on the local machine as well as manipulate network packets,
+     to partially recover the plaintext of messages under some conditions (see
+     previous entry) by using a cache attack targeting the SSL input record
+     buffer. Connections using GCM or CCM instead of CBC or using
+     Encrypt-then-Mac (RFC 7366) were not affected. Found by Kenny Paterson,
+     Eyal Ronen and Adi Shamir.
+
+Features
+   * Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time
+     authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed
+     by Daniel King.
+   * Add support for CHACHA20-POLY1305 ciphersuites from RFC 7905.
+   * Add platform support for the Haiku OS. (https://www.haiku-os.org).
+     Contributed by Augustin Cavalier.
+   * Make the receive and transmit buffers independent sizes, for situations
+     where the outgoing buffer can be fixed at a smaller size than the incoming
+     buffer, which can save some RAM. If buffer lengths are kept equal, there
+     is no functional difference. Contributed by Angus Gratton, and also
+     independently contributed again by Paul Sokolovsky.
+   * Add support for key wrapping modes based on AES as defined by
+     NIST SP 800-38F algorithms KW and KWP and by RFC 3394 and RFC 5649.
+
+Bugfix
+   * Fix the key_app_writer example which was writing a leading zero byte which
+     was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257.
+   * Fix compilation error on C++, because of a variable named new.
+     Found and fixed by Hirotaka Niisato in #1783.
+   * Fix "no symbols" warning issued by ranlib when building on Mac OS X. Fix
+     contributed by tabascoeye.
+   * Clarify documentation for mbedtls_ssl_write() to include 0 as a valid
+     return value. Found by @davidwu2000. #839
+   * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber,
+     Philippe Antoine. Fixes #1623.
+   * Remove unused headers included in x509.c. Found by Chris Hanson and fixed
+     by Brendan Shanks. Part of a fix for #992.
+   * Fix compilation error when MBEDTLS_ARC4_C is disabled and
+     MBEDTLS_CIPHER_NULL_CIPHER is enabled. Found by TrinityTonic in #1719.
+   * Added length checks to some TLS parsing functions. Found and fixed by
+     Philippe Antoine from Catena cyber. #1663.
+   * Fix the inline assembly for the MPI multiply helper function for i386 and
+     i386 with SSE2. Found by László Langó. Fixes #1550
+   * Fix namespacing in header files. Remove the `mbedtls` namespacing in
+     the `#include` in the header files. Resolves #857
+   * Fix compiler warning of 'use before initialisation' in
+     mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid
+     Drozd. #1098
+   * Fix decryption for zero length messages (which contain all padding) when a
+     CBC based ciphersuite is used together with Encrypt-then-MAC. Previously,
+     such a message was wrongly reported as an invalid record and therefore lead
+     to the connection being terminated. Seen most often with OpenSSL using
+     TLS 1.0. Reported by @kFYatek and by Conor Murphy on the forum. Fix
+     contributed by Espressif Systems. Fixes #1632
+   * Fix ssl_client2 example to send application data with 0-length content
+     when the request_size argument is set to 0 as stated in the documentation.
+     Fixes #1833.
+   * Correct the documentation for `mbedtls_ssl_get_session()`. This API has
+     deep copy of the session, and the peer certificate is not lost. Fixes #926.
+   * Fix build using -std=c99. Fixed by Nick Wilson.
+
+Changes
+   * Fail when receiving a TLS alert message with an invalid length, or invalid
+     zero-length messages when using TLS 1.2. Contributed by Espressif Systems.
+   * Change the default behaviour of mbedtls_hkdf_extract() to return an error
+     when calling with a NULL salt and non-zero salt_len. Contributed by
+     Brian J Murray
+   * Change the shebang line in Perl scripts to look up perl in the PATH.
+     Contributed by fbrosson.
+   * Allow overriding the time on Windows via the platform-time abstraction.
+     Fixed by Nick Wilson.
+   * Use gmtime_r/gmtime_s for thread-safety. Fixed by Nick Wilson.
+
+= mbed TLS 2.11.0 branch released 2018-06-18
+
+Features
+   * Add additional block mode, OFB (Output Feedback), to the AES module and
+     cipher abstraction module.
+   * Implement the HMAC-based extract-and-expand key derivation function
+     (HKDF) per RFC 5869. Contributed by Thomas Fossati.
+   * Add support for the CCM* block cipher mode as defined in IEEE Std. 802.15.4.
+   * Add support for the XTS block cipher mode with AES (AES-XTS).
+     Contributed by Aorimn in pull request #414.
+   * In TLS servers, support offloading private key operations to an external
+     cryptoprocessor. Private key operations can be asynchronous to allow
+     non-blocking operation of the TLS server stack.
+
+Bugfix
+   * Fix the cert_write example to handle certificates signed with elliptic
+     curves as well as RSA. Fixes #777 found by dbedev.
+   * Fix for redefinition of _WIN32_WINNT to avoid overriding a definition
+     used by user applications. Found and fixed by Fabio Alessandrelli.
+   * Fix compilation warnings with IAR toolchain, on 32 bit platform.
+     Reported by rahmanih in #683
+   * Fix braces in mbedtls_memory_buffer_alloc_status(). Found by sbranden, #552.
+
+Changes
+   * Changed CMake defaults for IAR to treat all compiler warnings as errors.
+   * Changed the Clang parameters used in the CMake build files to work for
+     versions later than 3.6. Versions of Clang earlier than this may no longer
+     work. Fixes #1072
+
+= mbed TLS 2.10.0 branch released 2018-06-06
+
+Features
+   * Add support for ARIA cipher (RFC 5794) and associated TLS ciphersuites
+     (RFC 6209). Disabled by default, see MBEDTLS_ARIA_C in config.h
+
+API Changes
+   * Extend the platform module with a util component that contains
+     functionality shared by multiple Mbed TLS modules. At this stage
+     platform_util.h (and its associated platform_util.c) only contain
+     mbedtls_platform_zeroize(), which is a critical function from a security
+     point of view. mbedtls_platform_zeroize() needs to be regularly tested
+     against compilers to ensure that calls to it are not removed from the
+     output binary as part of redundant code elimination optimizations.
+     Therefore, mbedtls_platform_zeroize() is moved to the platform module to
+     facilitate testing and maintenance.
+
+Bugfix
+   * Fix an issue with MicroBlaze support in bn_mul.h which was causing the
+     build to fail. Found by zv-io. Fixes #1651.
+
+Changes
+   * Support TLS testing in out-of-source builds using cmake. Fixes #1193.
+   * Fix redundant declaration of mbedtls_ssl_list_ciphersuites. Raised by
+     TrinityTonic. #1359.
+
+= mbed TLS 2.9.0 branch released 2018-04-30
+
+Security
+   * Fix an issue in the X.509 module which could lead to a buffer overread
+     during certificate validation. Additionally, the issue could also lead to
+     unnecessary callback checks being made or to some validation checks to be
+     omitted. The overread could be triggered remotely, while the other issues
+     would require a non DER-compliant certificate to be correctly signed by a
+     trusted CA, or a trusted CA with a non DER-compliant certificate. Found by
+     luocm. Fixes #825.
+   * Fix the buffer length assertion in the ssl_parse_certificate_request()
+     function which led to an arbitrary overread of the message buffer. The
+     overreads could be caused by receiving a malformed message at the point
+     where an optional signature algorithms list is expected when the signature
+     algorithms section is too short. In builds with debug output, the overread
+     data is output with the debug data.
+   * Fix a client-side bug in the validation of the server's ciphersuite choice
+     which could potentially lead to the client accepting a ciphersuite it didn't
+     offer or a ciphersuite that cannot be used with the TLS or DTLS version
+     chosen by the server. This could lead to corruption of internal data
+     structures for some configurations.
+
+Features
+   * Add an option, MBEDTLS_AES_FEWER_TABLES, to dynamically compute smaller AES
+     tables during runtime, thereby reducing the RAM/ROM footprint by ~6KiB.
+     Suggested and contributed by jkivilin in pull request #394.
+   * Add initial support for Curve448 (RFC 7748). Only mbedtls_ecp_mul() and
+     ECDH primitive functions (mbedtls_ecdh_gen_public(),
+     mbedtls_ecdh_compute_shared()) are supported for now. Contributed by
+     Nicholas Wilson in pull request #348.
+
+API Changes
+   * Extend the public API with the function of mbedtls_net_poll() to allow user
+     applications to wait for a network context to become ready before reading
+     or writing.
+   * Add function mbedtls_ssl_check_pending() to the public API to allow
+     a check for whether more more data is pending to be processed in the
+     internal message buffers.
+     This function is necessary to determine when it is safe to idle on the
+     underlying transport in case event-driven IO is used.
+
+Bugfix
+   * Fix a spurious uninitialized variable warning in cmac.c. Fix independently
+     contributed by Brian J Murray and David Brown.
+   * Add missing dependencies in test suites that led to build failures
+     in configurations that omit certain hashes or public-key algorithms.
+     Fixes #1040.
+   * Fix C89 incompatibility in benchmark.c. Contributed by Brendan Shanks.
+     #1353
+   * Add missing dependencies for MBEDTLS_HAVE_TIME_DATE and
+     MBEDTLS_VERSION_FEATURES in some test suites. Contributed by
+     Deomid Ryabkov. Fixes #1299, #1475.
+   * Fix the Makefile build process for building shared libraries on Mac OS X.
+     Fixed by mnacamura.
+   * Fix parsing of PKCS#8 encoded Elliptic Curve keys. Previously Mbed TLS was
+     unable to parse keys which had only the optional parameters field of the
+     ECPrivateKey structure. Found by Jethro Beekman, fixed in #1379.
+   * Return the plaintext data more quickly on unpadded CBC decryption, as
+     stated in the mbedtls_cipher_update() documentation. Contributed by
+     Andy Leiserson.
+   * Fix overriding and ignoring return values when parsing and writing to
+     a file in pk_sign program. Found by kevlut in #1142.
+   * Restrict usage of error code MBEDTLS_ERR_SSL_WANT_READ to situations
+     where data needs to be fetched from the underlying transport in order
+     to make progress. Previously, this error code was also occasionally
+     returned when unexpected messages were being discarded, ignoring that
+     further messages could potentially already be pending to be processed
+     in the internal buffers; these cases led to deadlocks when event-driven
+     I/O was used. Found and reported by Hubert Mis in #772.
+   * Fix buffer length assertions in the ssl_parse_certificate_request()
+     function which leads to a potential one byte overread of the message
+     buffer.
+   * Fix invalid buffer sizes passed to zlib during record compression and
+     decompression.
+   * Fix the soversion of libmbedcrypto to match the soversion of the
+     maintained 2.7 branch. The soversion was increased in Mbed TLS
+     version 2.7.1 to reflect breaking changes in that release, but the
+     increment was missed in 2.8.0 and later releases outside of the 2.7 branch.
+
+Changes
+   * Remove some redundant code in bignum.c. Contributed by Alexey Skalozub.
+   * Support cmake builds where Mbed TLS is a subproject. Fix contributed
+     independently by Matthieu Volat and Arne Schwabe.
+   * Improve testing in configurations that omit certain hashes or
+     public-key algorithms. Includes contributions by Gert van Dijk.
+   * Improve negative testing of X.509 parsing.
+   * Do not define global mutexes around readdir() and gmtime() in
+     configurations where the feature is disabled. Found and fixed by Gergely
+     Budai.
+   * Harden the function mbedtls_ssl_config_free() against misuse, so that it
+     doesn't leak memory if the user doesn't use mbedtls_ssl_conf_psk() and
+     instead incorrectly manipulates the configuration structure directly.
+     Found and fix submitted by junyeonLEE in #1220.
+   * Provide an empty implementation of mbedtls_pkcs5_pbes2() when
+     MBEDTLS_ASN1_PARSE_C is not enabled. This allows the use of PBKDF2
+     without PBES2. Fixed by Marcos Del Sol Vives.
+   * Add the order of the base point as N in the mbedtls_ecp_group structure
+     for Curve25519 (other curves had it already). Contributed by Nicholas
+     Wilson #481
+   * Improve the documentation of mbedtls_net_accept(). Contributed by Ivan
+     Krylov.
+   * Improve the documentation of mbedtls_ssl_write(). Suggested by
+     Paul Sokolovsky in #1356.
+   * Add an option in the Makefile to support ar utilities where the operation
+     letter must not be prefixed by '-', such as LLVM. Found and fixed by
+     Alex Hixon.
+   * Allow configuring the shared library extension by setting the DLEXT
+     environment variable when using the project makefiles.
+   * Optimize unnecessary zeroing in mbedtls_mpi_copy. Based on a contribution
+     by Alexey Skalozub in #405.
+   * In the SSL module, when f_send, f_recv or f_recv_timeout report
+     transmitting more than the required length, return an error. Raised by
+     Sam O'Connor in #1245.
+   * Improve robustness of mbedtls_ssl_derive_keys against the use of
+     HMAC functions with non-HMAC ciphersuites. Independently contributed
+     by Jiayuan Chen in #1377. Fixes #1437.
+   * Improve security of RSA key generation by including criteria from
+     FIPS 186-4. Contributed by Jethro Beekman. #1380
+   * Declare functions in header files even when an alternative implementation
+     of the corresponding module is activated by defining the corresponding
+     MBEDTLS_XXX_ALT macro. This means that alternative implementations do
+     not need to copy the declarations, and ensures that they will have the
+     same API.
+   * Add platform setup and teardown calls in test suites.
+
+= mbed TLS 2.8.0 branch released 2018-03-16
+
+Default behavior changes
+   * The truncated HMAC extension now conforms to RFC 6066. This means
+     that when both sides of a TLS connection negotiate the truncated
+     HMAC extension, Mbed TLS can now interoperate with other
+     compliant implementations, but this breaks interoperability with
+     prior versions of Mbed TLS. To restore the old behavior, enable
+     the (deprecated) option MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT in
+     config.h. Found by Andreas Walz (ivESK, Offenburg University of
+     Applied Sciences).
+
+Security
+   * Fix implementation of the truncated HMAC extension. The previous
+     implementation allowed an offline 2^80 brute force attack on the
+     HMAC key of a single, uninterrupted connection (with no
+     resumption of the session).
+   * Verify results of RSA private key operations to defend
+     against Bellcore glitch attack.
+   * Fix a buffer overread in ssl_parse_server_key_exchange() that could cause
+     a crash on invalid input.
+   * Fix a buffer overread in ssl_parse_server_psk_hint() that could cause a
+     crash on invalid input.
+   * Fix CRL parsing to reject CRLs containing unsupported critical
+     extensions. Found by Falko Strenzke and Evangelos Karatsiolis.
+
+Features
+   * Extend PKCS#8 interface by introducing support for the entire SHA
+     algorithms family when encrypting private keys using PKCS#5 v2.0.
+     This allows reading encrypted PEM files produced by software that
+     uses PBKDF2-SHA2, such as OpenSSL 1.1. Submitted by Antonio Quartulli,
+     OpenVPN Inc. Fixes #1339
+   * Add support for public keys encoded in PKCS#1 format. #1122
+
+New deprecations
+   * Deprecate support for record compression (configuration option
+     MBEDTLS_ZLIB_SUPPORT).
+
+Bugfix
+   * Fix the name of a DHE parameter that was accidentally changed in 2.7.0.
+     Fixes #1358.
+   * Fix test_suite_pk to work on 64-bit ILP32 systems. #849
+   * Fix mbedtls_x509_crt_profile_suiteb, which used to reject all certificates
+     with flag MBEDTLS_X509_BADCERT_BAD_PK even when the key type was correct.
+     In the context of SSL, this resulted in handshake failure. Reported by
+     daniel in the Mbed TLS forum. #1351
+   * Fix Windows x64 builds with the included mbedTLS.sln file. #1347
+   * Fix setting version TLSv1 as minimal version, even if TLS 1
+     is not enabled. Set MBEDTLS_SSL_MIN_MAJOR_VERSION
+     and MBEDTLS_SSL_MIN_MINOR_VERSION instead of
+     MBEDTLS_SSL_MAJOR_VERSION_3 and MBEDTLS_SSL_MINOR_VERSION_1. #664
+   * Fix compilation error on Mingw32 when _TRUNCATE is defined. Use _TRUNCATE
+     only if __MINGW32__ not defined. Fix suggested by Thomas Glanzmann and
+     Nick Wilson on issue #355
+   * In test_suite_pk, pass valid parameters when testing for hash length
+     overflow. #1179
+   * Fix memory allocation corner cases in memory_buffer_alloc.c module. Found
+     by Guido Vranken. #639
+   * Log correct number of ciphersuites used in Client Hello message. #918
+   * Fix X509 CRT parsing that would potentially accept an invalid tag when
+     parsing the subject alternative names.
+   * Fix a possible arithmetic overflow in ssl_parse_server_key_exchange()
+     that could cause a key exchange to fail on valid data.
+   * Fix a possible arithmetic overflow in ssl_parse_server_psk_hint() that
+     could cause a key exchange to fail on valid data.
+   * Don't define mbedtls_aes_decrypt and mbedtls_aes_encrypt under
+     MBEDTLS_DEPRECATED_REMOVED. #1388
+   * Fix a 1-byte heap buffer overflow (read-only) during private key parsing.
+     Found through fuzz testing.
+
+Changes
+   * Fix tag lengths and value ranges in the documentation of CCM encryption.
+     Contributed by Mathieu Briand.
+   * Fix typo in a comment ctr_drbg.c. Contributed by Paul Sokolovsky.
+   * Remove support for the library reference configuration for picocoin.
+   * MD functions deprecated in 2.7.0 are no longer inline, to provide
+     a migration path for those depending on the library's ABI.
+   * Clarify the documentation of mbedtls_ssl_setup.
+   * Use (void) when defining functions with no parameters. Contributed by
+     Joris Aerts. #678
+
+= mbed TLS 2.7.0 branch released 2018-02-03
+
+Security
+   * Fix a heap corruption issue in the implementation of the truncated HMAC
+     extension. When the truncated HMAC extension is enabled and CBC is used,
+     sending a malicious application packet could be used to selectively corrupt
+     6 bytes on the peer's heap, which could potentially lead to crash or remote
+     code execution. The issue could be triggered remotely from either side in
+     both TLS and DTLS. CVE-2018-0488
+   * Fix a buffer overflow in RSA-PSS verification when the hash was too large
+     for the key size, which could potentially lead to crash or remote code
+     execution. Found by Seth Terashima, Qualcomm Product Security Initiative,
+     Qualcomm Technologies Inc. CVE-2018-0487
+   * Fix buffer overflow in RSA-PSS verification when the unmasked data is all
+     zeros.
+   * Fix an unsafe bounds check in ssl_parse_client_psk_identity() when adding
+     64 KiB to the address of the SSL buffer and causing a wrap around.
+   * Fix a potential heap buffer overflow in mbedtls_ssl_write(). When the (by
+     default enabled) maximum fragment length extension is disabled in the
+     config and the application data buffer passed to mbedtls_ssl_write
+     is larger than the internal message buffer (16384 bytes by default), the
+     latter overflows. The exploitability of this issue depends on whether the
+     application layer can be forced into sending such large packets. The issue
+     was independently reported by Tim Nordell via e-mail and by Florin Petriuc
+     and sjorsdewit on GitHub. Fix proposed by Florin Petriuc in #1022.
+     Fixes #707.
+   * Add a provision to prevent compiler optimizations breaking the time
+     constancy of mbedtls_ssl_safer_memcmp().
+   * Ensure that buffers are cleared after use if they contain sensitive data.
+     Changes were introduced in multiple places in the library.
+   * Set PEM buffer to zero before freeing it, to avoid decoded private keys
+     being leaked to memory after release.
+   * Fix dhm_check_range() failing to detect trivial subgroups and potentially
+     leaking 1 bit of the private key. Reported by prashantkspatil.
+   * Make mbedtls_mpi_read_binary() constant-time with respect to the input
+     data. Previously, trailing zero bytes were detected and omitted for the
+     sake of saving memory, but potentially leading to slight timing
+     differences. Reported by Marco Macchetti, Kudelski Group.
+   * Wipe stack buffer temporarily holding EC private exponent
+     after keypair generation.
+   * Fix a potential heap buffer over-read in ALPN extension parsing
+     (server-side). Could result in application crash, but only if an ALPN
+     name larger than 16 bytes had been configured on the server.
+   * Change default choice of DHE parameters from untrustworthy RFC 5114
+     to RFC 3526 containing parameters generated in a nothing-up-my-sleeve
+     manner.
+
+Features
+   * Allow comments in test data files.
+   * The selftest program can execute a subset of the tests based on command
+     line arguments.
+   * New unit tests for timing. Improve the self-test to be more robust
+     when run on a heavily-loaded machine.
+   * Add alternative implementation support for CCM and CMAC (MBEDTLS_CCM_ALT,
+     MBEDTLS_CMAC_ALT). Submitted by Steven Cooreman, Silicon Labs.
+   * Add support for alternative implementations of GCM, selected by the
+     configuration flag MBEDTLS_GCM_ALT.
+   * Add support for alternative implementations for ECDSA, controlled by new
+     configuration flags MBEDTLS_ECDSA_SIGN_ALT, MBEDTLS_ECDSA_VERIFY_ALT and
+     MBEDTLS_ECDSDA_GENKEY_AT in config.h.
+     The following functions from the ECDSA module can be replaced
+     with alternative implementation:
+     mbedtls_ecdsa_sign(), mbedtls_ecdsa_verify() and mbedtls_ecdsa_genkey().
+   * Add support for alternative implementation of ECDH, controlled by the
+     new configuration flags MBEDTLS_ECDH_COMPUTE_SHARED_ALT and
+     MBEDTLS_ECDH_GEN_PUBLIC_ALT in config.h.
+     The following functions from the ECDH module can be replaced
+     with an alternative implementation:
+     mbedtls_ecdh_gen_public() and mbedtls_ecdh_compute_shared().
+   * Add support for alternative implementation of ECJPAKE, controlled by
+     the new configuration flag MBEDTLS_ECJPAKE_ALT.
+   * Add mechanism to provide alternative implementation of the DHM module.
+
+API Changes
+   * Extend RSA interface by multiple functions allowing structure-
+     independent setup and export of RSA contexts. Most notably,
+     mbedtls_rsa_import() and mbedtls_rsa_complete() are introduced for setting
+     up RSA contexts from partial key material and having them completed to the
+     needs of the implementation automatically. This allows to setup private RSA
+     contexts from keys consisting of N,D,E only, even if P,Q are needed for the
+     purpose or CRT and/or blinding.
+   * The configuration option MBEDTLS_RSA_ALT can be used to define alternative
+     implementations of the RSA interface declared in rsa.h.
+   * The following functions in the message digest modules (MD2, MD4, MD5,
+     SHA1, SHA256, SHA512) have been deprecated and replaced as shown below.
+     The new functions change the return type from void to int to allow
+     returning error codes when using MBEDTLS_<MODULE>_ALT.
+     mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ret()
+     mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ret()
+     mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ret()
+     mbedtls_<MODULE>_process() -> mbedtls_internal_<MODULE>_process()
+
+New deprecations
+   * Deprecate usage of RSA primitives with non-matching key-type
+     (e.g. signing with a public key).
+   * Direct manipulation of structure fields of RSA contexts is deprecated.
+     Users are advised to use the extended RSA API instead.
+   * Deprecate usage of message digest functions that return void
+     (mbedtls_<MODULE>_starts, mbedtls_<MODULE>_update,
+     mbedtls_<MODULE>_finish and mbedtls_<MODULE>_process where <MODULE> is
+     any of MD2, MD4, MD5, SHA1, SHA256, SHA512) in favor of functions
+     that can return an error code.
+   * Deprecate untrustworthy DHE parameters from RFC 5114. Superseded by
+     parameters from RFC 3526 or the newly added parameters from RFC 7919.
+   * Deprecate hex string DHE constants MBEDTLS_DHM_RFC3526_MODP_2048_P etc.
+     Supserseded by binary encoded constants MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN
+     etc.
+   * Deprecate mbedtls_ssl_conf_dh_param() for setting default DHE parameters
+     from hex strings. Superseded by mbedtls_ssl_conf_dh_param_bin()
+     accepting DHM parameters in binary form, matching the new constants.
+
+Bugfix
+   * Fix ssl_parse_record_header() to silently discard invalid DTLS records
+     as recommended in RFC 6347 Section 4.1.2.7.
+   * Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times.
+     Found by projectgus and Jethro Beekman, #836.
+   * Fix usage help in ssl_server2 example. Found and fixed by Bei Lin.
+   * Parse signature algorithm extension when renegotiating. Previously,
+     renegotiated handshakes would only accept signatures using SHA-1
+     regardless of the peer's preferences, or fail if SHA-1 was disabled.
+   * Fix leap year calculation in x509_date_is_valid() to ensure that invalid
+     dates on leap years with 100 and 400 intervals are handled correctly. Found
+     by Nicholas Wilson. #694
+   * Fix some invalid RSA-PSS signatures with keys of size 8N+1 that were
+     accepted. Generating these signatures required the private key.
+   * Fix out-of-memory problem when parsing 4096-bit PKCS8-encrypted RSA keys.
+     Found independently by Florian in the mbed TLS forum and by Mishamax.
+     #878, #1019.
+   * Fix variable used before assignment compilation warnings with IAR
+     toolchain. Found by gkerrien38.
+   * Fix unchecked return codes from AES, DES and 3DES functions in
+     pem_aes_decrypt(), pem_des_decrypt() and pem_des3_decrypt() respectively.
+     If a call to one of the functions of the cryptographic primitive modules
+     failed, the error may not be noticed by the function
+     mbedtls_pem_read_buffer() causing it to return invalid values. Found by
+     Guido Vranken. #756
+   * Include configuration file in md.h, to fix compilation warnings.
+     Reported by aaronmdjones in #1001
+   * Correct extraction of signature-type from PK instance in X.509 CRT and CSR
+     writing routines that prevented these functions to work with alternative
+     RSA implementations. Raised by J.B. in the Mbed TLS forum. Fixes #1011.
+   * Don't print X.509 version tag for v1 CRT's, and omit extensions for
+     non-v3 CRT's.
+   * Fix bugs in RSA test suite under MBEDTLS_NO_PLATFORM_ENTROPY. #1023 #1024
+   * Fix net_would_block() to avoid modification by errno through fcntl() call.
+     Found by nkolban. Fixes #845.
+   * Fix handling of handshake messages in mbedtls_ssl_read() in case
+     MBEDTLS_SSL_RENEGOTIATION is disabled. Found by erja-gp.
+   * Add a check for invalid private parameters in mbedtls_ecdsa_sign().
+     Reported by Yolan Romailler.
+   * Fix word size check in in pk.c to not depend on MBEDTLS_HAVE_INT64.
+   * Fix incorrect unit in benchmark output. #850
+   * Add size-checks for record and handshake message content, securing
+     fragile yet non-exploitable code-paths.
+   * Fix crash when calling mbedtls_ssl_cache_free() twice. Found by
+     MilenkoMitrovic, #1104
+   * Fix mbedtls_timing_alarm(0) on Unix and MinGW.
+   * Fix use of uninitialized memory in mbedtls_timing_get_timer() when reset=1.
+   * Fix possible memory leaks in mbedtls_gcm_self_test().
+   * Added missing return code checks in mbedtls_aes_self_test().
+   * Fix issues in RSA key generation program programs/x509/rsa_genkey and the
+     RSA test suite where the failure of CTR DRBG initialization lead to
+     freeing an RSA context and several MPI's without proper initialization
+     beforehand.
+   * Fix error message in programs/pkey/gen_key.c. Found and fixed by Chris Xue.
+   * Fix programs/pkey/dh_server.c so that it actually works with dh_client.c.
+     Found and fixed by Martijn de Milliano.
+   * Fix an issue in the cipher decryption with the mode
+     MBEDTLS_PADDING_ONE_AND_ZEROS that sometimes accepted invalid padding.
+     Note, this padding mode is not used by the TLS protocol. Found and fixed by
+     Micha Kraus.
+   * Fix the entropy.c module to not call mbedtls_sha256_starts() or
+     mbedtls_sha512_starts() in the mbedtls_entropy_init() function.
+   * Fix the entropy.c module to ensure that mbedtls_sha256_init() or
+     mbedtls_sha512_init() is called before operating on the relevant context
+     structure. Do not assume that zeroizing a context is a correct way to
+     reset it. Found independently by ccli8 on Github.
+   * In mbedtls_entropy_free(), properly free the message digest context.
+   * Fix status handshake status message in programs/ssl/dtls_client.c. Found
+     and fixed by muddog.
+
+Changes
+   * Extend cert_write example program by options to set the certificate version
+     and the message digest. Further, allow enabling/disabling of authority
+     identifier, subject identifier and basic constraints extensions.
+   * Only check for necessary RSA structure fields in `mbedtls_rsa_private`. In
+     particular, don't require P,Q if neither CRT nor blinding are
+     used. Reported and fix proposed independently by satur9nine and sliai
+     on GitHub.
+   * Only run AES-192 self-test if AES-192 is available. Fixes #963.
+   * Tighten the RSA PKCS#1 v1.5 signature verification code and remove the
+     undeclared dependency of the RSA module on the ASN.1 module.
+   * Update all internal usage of deprecated message digest functions to the
+     new ones with return codes. In particular, this modifies the
+     mbedtls_md_info_t structure. Propagate errors from these functions
+     everywhere except some locations in the ssl_tls.c module.
+   * Improve CTR_DRBG error handling by propagating underlying AES errors.
+   * Add MBEDTLS_ERR_XXX_HW_ACCEL_FAILED error codes for all cryptography
+     modules where the software implementation can be replaced by a hardware
+     implementation.
+   * Add explicit warnings for the use of MD2, MD4, MD5, SHA-1, DES and ARC4
+     throughout the library.
+
+= mbed TLS 2.6.0 branch released 2017-08-10
+
+Security
+   * Fix authentication bypass in SSL/TLS: when authmode is set to optional,
+     mbedtls_ssl_get_verify_result() would incorrectly return 0 when the peer's
+     X.509 certificate chain had more than MBEDTLS_X509_MAX_INTERMEDIATE_CA
+     (default: 8) intermediates, even when it was not trusted. This could be
+     triggered remotely from either side. (With authmode set to 'required'
+     (the default), the handshake was correctly aborted).
+   * Reliably wipe sensitive data after use in the AES example applications
+     programs/aes/aescrypt2 and programs/aes/crypt_and_hash.
+     Found by Laurent Simon.
+
+Features
+   * Add the functions mbedtls_platform_setup() and mbedtls_platform_teardown()
+     and the context struct mbedtls_platform_context to perform
+     platform-specific setup and teardown operations. The macro
+     MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT allows the functions to be overridden
+     by the user in a platform_alt.h file. These new functions are required in
+     some embedded environments to provide a means of initialising underlying
+     cryptographic acceleration hardware.
+
+API Changes
+   * Reverted API/ABI breaking changes introduced in mbed TLS 2.5.1, to make the
+     API consistent with mbed TLS 2.5.0. Specifically removed the inline
+     qualifier from the functions mbedtls_aes_decrypt, mbedtls_aes_encrypt,
+     mbedtls_ssl_ciphersuite_uses_ec and mbedtls_ssl_ciphersuite_uses_psk. Found
+     by James Cowgill. #978
+   * Certificate verification functions now set flags to -1 in case the full
+     chain was not verified due to an internal error (including in the verify
+     callback) or chain length limitations.
+   * With authmode set to optional, the TLS handshake is now aborted if the
+     verification of the peer's certificate failed due to an overlong chain or
+     a fatal error in the verify callback.
+
+Bugfix
+   * Add a check if iv_len is zero in GCM, and return an error if it is zero.
+     Reported by roberto. #716
+   * Replace preprocessor condition from #if defined(MBEDTLS_THREADING_PTHREAD)
+     to #if defined(MBEDTLS_THREADING_C) as the library cannot assume they will
+     always be implemented by pthread support. #696
+   * Fix a resource leak on Windows platforms in mbedtls_x509_crt_parse_path(),
+     in the case of an error. Found by redplait. #590
+   * Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random.
+     Reported and fix suggested by guidovranken. #740
+   * Fix conditional preprocessor directives in bignum.h to enable 64-bit
+     compilation when using ARM Compiler 6.
+   * Fix a potential integer overflow in the version verification for DER
+     encoded X.509 CRLs. The overflow could enable maliciously constructed CRLs
+     to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin,
+     KNOX Security, Samsung Research America
+   * Fix potential integer overflow in the version verification for DER
+     encoded X.509 CSRs. The overflow could enable maliciously constructed CSRs
+     to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin,
+     KNOX Security, Samsung Research America
+   * Fix a potential integer overflow in the version verification for DER
+     encoded X.509 certificates. The overflow could enable maliciously
+     constructed certificates to bypass the certificate verification check.
+   * Fix a call to the libc function time() to call the platform abstraction
+     function mbedtls_time() instead. Found by wairua. #666
+   * Avoid shadowing of time and index functions through mbed TLS function
+     arguments. Found by inestlerode. #557.
+
+Changes
+   * Added config.h option MBEDTLS_NO_UDBL_DIVISION, to prevent the use of
+     64-bit division. This is useful on embedded platforms where 64-bit division
+     created a dependency on external libraries. #708
+   * Removed mutexes from ECP hardware accelerator code. Now all hardware
+     accelerator code in the library leaves concurrency handling to the
+     platform. Reported by Steven Cooreman. #863
+   * Define the macro MBEDTLS_AES_ROM_TABLES in the configuration file
+     config-no-entropy.h to reduce the RAM footprint.
+   * Added a test script that can be hooked into git that verifies commits
+     before they are pushed.
+   * Improve documentation of PKCS1 decryption functions.
+
+= mbed TLS 2.5.1 released 2017-06-21
+
+Security
+   * Fixed unlimited overread of heap-based buffer in mbedtls_ssl_read().
+     The issue could only happen client-side with renegotiation enabled.
+     Could result in DoS (application crash) or information leak
+     (if the application layer sent data read from mbedtls_ssl_read()
+     back to the server or to a third party). Can be triggered remotely.
+   * Removed SHA-1 and RIPEMD-160 from the default hash algorithms for
+     certificate verification. SHA-1 can be turned back on with a compile-time
+     option if needed.
+   * Fixed offset in FALLBACK_SCSV parsing that caused TLS server to fail to
+     detect it sometimes. Reported by Hugo Leisink. #810
+   * Tighten parsing of RSA PKCS#1 v1.5 signatures, to avoid a
+     potential Bleichenbacher/BERserk-style attack.
+
+Bugfix
+   * Remove size zero arrays from ECJPAKE test suite. Size zero arrays are not
+     valid C and they prevented the test from compiling in Visual Studio 2015
+     and with GCC using the -Wpedantic compilation option.
+   * Fix insufficient support for signature-hash-algorithm extension,
+     resulting in compatibility problems with Chrome. Found by hfloyrd. #823
+   * Fix behaviour that hid the original cause of fatal alerts in some cases
+     when sending the alert failed. The fix makes sure not to hide the error
+     that triggered the alert.
+   * Fix SSLv3 renegotiation behaviour and stop processing data received from
+     peer after sending a fatal alert to refuse a renegotiation attempt.
+     Previous behaviour was to keep processing data even after the alert has
+     been sent.
+   * Accept empty trusted CA chain in authentication mode
+     MBEDTLS_SSL_VERIFY_OPTIONAL. Found by Jethro Beekman. #864
+   * Fix implementation of mbedtls_ssl_parse_certificate() to not annihilate
+     fatal errors in authentication mode MBEDTLS_SSL_VERIFY_OPTIONAL and to
+     reflect bad EC curves within verification result.
+   * Fix bug that caused the modular inversion function to accept the invalid
+     modulus 1 and therefore to hang. Found by blaufish. #641.
+   * Fix incorrect sign computation in modular exponentiation when the base is
+     a negative MPI. Previously the result was always negative. Found by Guido
+     Vranken.
+   * Fix a numerical underflow leading to stack overflow in mpi_read_file()
+     that was triggered uppon reading an empty line. Found by Guido Vranken.
+
+Changes
+   * Send fatal alerts in more cases. The previous behaviour was to skip
+     sending the fatal alert and just drop the connection.
+   * Clarify ECDSA documentation and improve the sample code to avoid
+     misunderstanding and potentially dangerous use of the API. Pointed out
+     by Jean-Philippe Aumasson.
+
+= mbed TLS 2.5.0 branch released 2017-05-17
+
+Security
+   * Wipe stack buffers in RSA private key operations
+     (rsa_rsaes_pkcs1_v15_decrypt(), rsa_rsaes_oaep_decrypt). Found by Laurent
+     Simon.
+   * Add exponent blinding to RSA private operations as a countermeasure
+     against side-channel attacks like the cache attack described in
+     https://arxiv.org/abs/1702.08719v2.
+     Found and fix proposed by Michael Schwarz, Samuel Weiser, Daniel Gruss,
+     Clémentine Maurice and Stefan Mangard.
+
+Features
+   * Add hardware acceleration support for the Elliptic Curve Point module.
+     This involved exposing parts of the internal interface to enable
+     replacing the core functions and adding and alternative, module level
+     replacement support for enabling the extension of the interface.
+   * Add a new configuration option to 'mbedtls_ssl_config' to enable
+     suppressing the CA list in Certificate Request messages. The default
+     behaviour has not changed, namely every configured CAs name is included.
+
+API Changes
+   * The following functions in the AES module have been deprecated and replaced
+     by the functions shown below. The new functions change the return type from
+     void to int to allow returning error codes when using MBEDTLS_AES_ALT,
+     MBEDTLS_AES_DECRYPT_ALT or MBEDTLS_AES_ENCRYPT_ALT.
+     mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt()
+     mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt()
+
+Bugfix
+   * Remove macros from compat-1.3.h that correspond to deleted items from most
+     recent versions of the library. Found by Kyle Keen.
+   * Fixed issue in the Threading module that prevented mutexes from
+     initialising. Found by sznaider. #667 #843
+   * Add checks in the PK module for the RSA functions on 64-bit systems.
+     The PK and RSA modules use different types for passing hash length and
+     without these checks the type cast could lead to data loss. Found by Guido
+     Vranken.
+
+= mbed TLS 2.4.2 branch released 2017-03-08
+
+Security
+   * Add checks to prevent signature forgeries for very large messages while
+     using RSA through the PK module in 64-bit systems. The issue was caused by
+     some data loss when casting a size_t to an unsigned int value in the
+     functions rsa_verify_wrap(), rsa_sign_wrap(), rsa_alt_sign_wrap() and
+     mbedtls_pk_sign(). Found by Jean-Philippe Aumasson.
+   * Fixed potential livelock during the parsing of a CRL in PEM format in
+     mbedtls_x509_crl_parse(). A string containing a CRL followed by trailing
+     characters after the footer could result in the execution of an infinite
+     loop. The issue can be triggered remotely. Found by Greg Zaverucha,
+     Microsoft.
+   * Removed MD5 from the allowed hash algorithms for CertificateRequest and
+     CertificateVerify messages, to prevent SLOTH attacks against TLS 1.2.
+     Introduced by interoperability fix for #513.
+   * Fixed a bug that caused freeing a buffer that was allocated on the stack,
+     when verifying the validity of a key on secp224k1. This could be
+     triggered remotely for example with a maliciously constructed certificate
+     and potentially could lead to remote code execution on some platforms.
+     Reported independently by rongsaws and Aleksandar Nikolic, Cisco Talos
+     team. #569 CVE-2017-2784
+
+Bugfix
+   * Fix output certificate verification flags set by x509_crt_verify_top() when
+     traversing a chain of trusted CA. The issue would cause both flags,
+     MBEDTLS_X509_BADCERT_NOT_TRUSTED and MBEDTLS_X509_BADCERT_EXPIRED, to be
+     set when the verification conditions are not met regardless of the cause.
+     Found by Harm Verhagen and inestlerode. #665 #561
+   * Fix the redefinition of macro ssl_set_bio to an undefined symbol
+     mbedtls_ssl_set_bio_timeout in compat-1.3.h, by removing it.
+     Found by omlib-lin. #673
+   * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and
+     x509_csr.c that are reported when building mbed TLS with a config.h that
+     does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562
+   * Fix incorrect renegotiation condition in ssl_check_ctr_renegotiate() that
+     would compare 64 bits of the record counter instead of 48 bits as indicated
+     in RFC 6347 Section 4.3.1. This could cause the execution of the
+     renegotiation routines at unexpected times when the protocol is DTLS. Found
+     by wariua. #687
+   * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing
+     the input string in PEM format to extract the different components. Found
+     by Eyal Itkin.
+   * Fixed potential arithmetic overflow in mbedtls_ctr_drbg_reseed() that could
+     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
+   * Fixed potential arithmetic overflows in mbedtls_cipher_update() that could
+     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
+   * Fixed potential arithmetic overflow in mbedtls_md2_update() that could
+     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
+   * Fixed potential arithmetic overflow in mbedtls_base64_decode() that could
+     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
+   * Fixed heap overreads in mbedtls_x509_get_time(). Found by Peng
+     Li/Yueh-Hsun Lin, KNOX Security, Samsung Research America.
+   * Fix potential memory leak in mbedtls_x509_crl_parse(). The leak was caused
+     by missing calls to mbedtls_pem_free() in cases when a
+     MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT error was encountered. Found and
+     fix proposed by Guido Vranken. #722
+   * Fixed the templates used to generate project and solution files for Visual
+     Studio 2015 as well as the files themselves, to remove a build warning
+     generated in Visual Studio 2015. Reported by Steve Valliere. #742
+   * Fix a resource leak in ssl_cookie, when using MBEDTLS_THREADING_C.
+     Raised and fix suggested by Alan Gillingham in the mbed TLS forum. #771
+   * Fix 1 byte buffer overflow in mbedtls_mpi_write_string() when the MPI
+     number to write in hexadecimal is negative and requires an odd number of
+     digits. Found and fixed by Guido Vranken.
+   * Fix unlisted DES configuration dependency in some pkparse test cases. Found
+     by inestlerode. #555
+
+= mbed TLS 2.4.1 branch released 2016-12-13
+
+Changes
+   * Update to CMAC test data, taken from - NIST Special Publication 800-38B -
+     Recommendation for Block Cipher Modes of Operation: The CMAC Mode for
+     Authentication – October  2016
+
+= mbed TLS 2.4.0 branch released 2016-10-17
+
+Security
+   * Removed the MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant
+     with RFC-5116 and could lead to session key recovery in very long TLS
+     sessions. "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in
+     TLS" - H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic.
+     https://eprint.iacr.org/2016/475.pdf
+   * Fixed potential stack corruption in mbedtls_x509write_crt_der() and
+     mbedtls_x509write_csr_der() when the signature is copied to the buffer
+     without checking whether there is enough space in the destination. The
+     issue cannot be triggered remotely. Found by Jethro Beekman.
+
+Features
+   * Added support for CMAC for AES and 3DES and AES-CMAC-PRF-128, as defined by
+     NIST SP 800-38B, RFC-4493 and RFC-4615.
+   * Added hardware entropy selftest to verify that the hardware entropy source
+     is functioning correctly.
+   * Added a script to print build environment info for diagnostic use in test
+     scripts, which is also now called by all.sh.
+   * Added the macro MBEDTLS_X509_MAX_FILE_PATH_LEN that enables the user to
+     configure the maximum length of a file path that can be buffered when
+     calling mbedtls_x509_crt_parse_path().
+   * Added a configuration file config-no-entropy.h that configures the subset of
+     library features that do not require an entropy source.
+   * Added the macro MBEDTLS_ENTROPY_MIN_HARDWARE in config.h. This allows users
+     to configure the minimum number of bytes for entropy sources using the
+     mbedtls_hardware_poll() function.
+
+Bugfix
+   * Fix for platform time abstraction to avoid dependency issues where a build
+     may need time but not the standard C library abstraction, and added
+     configuration consistency checks to check_config.h
+   * Fix dependency issue in Makefile to allow parallel builds.
+   * Fix incorrect handling of block lengths in crypt_and_hash.c sample program,
+     when GCM is used. Found by udf2457. #441
+   * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't
+     enabled unless others were also present. Found by David Fernandez. #428
+   * Fix for out-of-tree builds using CMake. Found by jwurzer, and fix based on
+     a contribution from Tobias Tangemann. #541
+   * Fixed cert_app.c sample program for debug output and for use when no root
+     certificates are provided.
+   * Fix conditional statement that would cause a 1 byte overread in
+     mbedtls_asn1_get_int(). Found and fixed by Guido Vranken. #599
+   * Fixed pthread implementation to avoid unintended double initialisations
+     and double frees. Found by Niklas Amnebratt.
+   * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for
+     builds where the configuration MBEDTLS_PEM_WRITE_C is not defined. Found
+     by inestlerode. #559.
+   * Fix mbedtls_x509_get_sig() to update the ASN1 type in the mbedtls_x509_buf
+     data structure until after error checks are successful. Found by
+     subramanyam-c. #622
+   * Fix documentation and implementation missmatch for function arguments of
+     mbedtls_gcm_finish(). Found by cmiatpaar. #602
+   * Guarantee that P>Q at RSA key generation. Found by inestlerode. #558
+   * Fix potential byte overread when verifying malformed SERVER_HELLO in
+     ssl_parse_hello_verify_request() for DTLS. Found by Guido Vranken.
+   * Fix check for validity of date when parsing in mbedtls_x509_get_time().
+     Found by subramanyam-c. #626
+   * Fix compatibility issue with Internet Explorer client authentication,
+     where the limited hash choices prevented the client from sending its
+     certificate. Found by teumas. #513
+   * Fix compilation without MBEDTLS_SELF_TEST enabled.
+
+Changes
+   * Extended test coverage of special cases, and added new timing test suite.
+   * Removed self-tests from the basic-built-test.sh script, and added all
+     missing self-tests to the test suites, to ensure self-tests are only
+     executed once.
+   * Added support for 3 and 4 byte lengths to mbedtls_asn1_write_len().
+   * Added support for a Yotta specific configuration file -
+     through the symbol YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE.
+   * Added optimization for code space for X.509/OID based on configured
+     features. Contributed by Aviv Palivoda.
+   * Renamed source file library/net.c to library/net_sockets.c to avoid
+     naming collision in projects which also have files with the common name
+     net.c. For consistency, the corresponding header file, net.h, is marked as
+     deprecated, and its contents moved to net_sockets.h.
+   * Changed the strategy for X.509 certificate parsing and validation, to no
+     longer disregard certificates with unrecognised fields.
+
+= mbed TLS 2.3.0 branch released 2016-06-28
+
+Security
+   * Fix missing padding length check in mbedtls_rsa_rsaes_pkcs1_v15_decrypt
+     required by PKCS1 v2.2
+   * Fix potential integer overflow to buffer overflow in
+     mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt
+     (not triggerable remotely in (D)TLS).
+   * Fix a potential integer underflow to buffer overread in
+     mbedtls_rsa_rsaes_oaep_decrypt. It is not triggerable remotely in
+     SSL/TLS.
+
+Features
+   * Support for platform abstraction of the standard C library time()
+     function.
+
+Bugfix
+   * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three
+     arguments where the same (in-place doubling). Found and fixed by Janos
+     Follath. #309
+   * Fix potential build failures related to the 'apidoc' target, introduced
+     in the previous patch release. Found by Robert Scheck. #390 #391
+   * Fix issue in Makefile that prevented building using armar. #386
+   * Fix memory leak that occurred only when ECJPAKE was enabled and ECDHE and
+     ECDSA was disabled in config.h . The leak didn't occur by default.
+   * Fix an issue that caused valid certificates to be rejected whenever an
+     expired or not yet valid certificate was parsed before a valid certificate
+     in the trusted certificate list.
+   * Fix bug in mbedtls_x509_crt_parse that caused trailing extra data in the
+     buffer after DER certificates to be included in the raw representation.
+   * Fix issue that caused a hang when generating RSA keys of odd bitlength
+   * Fix bug in mbedtls_rsa_rsaes_pkcs1_v15_encrypt that made null pointer
+     dereference possible.
+   * Fix issue that caused a crash if invalid curves were passed to
+     mbedtls_ssl_conf_curves. #373
+   * Fix issue in ssl_fork_server which was preventing it from functioning. #429
+   * Fix memory leaks in test framework
+   * Fix test in ssl-opt.sh that does not run properly with valgrind
+   * Fix unchecked calls to mmbedtls_md_setup(). Fix by Brian Murray. #502
+
+Changes
+   * On ARM platforms, when compiling with -O0 with GCC, Clang or armcc5,
+     don't use the optimized assembly for bignum multiplication. This removes
+     the need to pass -fomit-frame-pointer to avoid a build error with -O0.
+   * Disabled SSLv3 in the default configuration.
+   * Optimized mbedtls_mpi_zeroize() for MPI integer size. (Fix by Alexey
+     Skalozub).
+   * Fix non-compliance server extension handling. Extensions for SSLv3 are now
+     ignored, as required by RFC6101.
+
+= mbed TLS 2.2.1 released 2016-01-05
+
+Security
+   * Fix potential double free when mbedtls_asn1_store_named_data() fails to
+     allocate memory. Only used for certificate generation, not triggerable
+     remotely in SSL/TLS. Found by Rafał Przywara. #367
+   * Disable MD5 handshake signatures in TLS 1.2 by default to prevent the
+     SLOTH attack on TLS 1.2 server authentication (other attacks from the
+     SLOTH paper do not apply to any version of mbed TLS or PolarSSL).
+     https://www.mitls.org/pages/attacks/SLOTH
+
+Bugfix
+   * Fix over-restrictive length limit in GCM. Found by Andreas-N. #362
+   * Fix bug in certificate validation that caused valid chains to be rejected
+     when the first intermediate certificate has pathLenConstraint=0. Found by
+     Nicholas Wilson. Introduced in mbed TLS 2.2.0. #280
+   * Removed potential leak in mbedtls_rsa_rsassa_pkcs1_v15_sign(), found by
+     JayaraghavendranK. #372
+   * Fix suboptimal handling of unexpected records that caused interop issues
+     with some peers over unreliable links. Avoid dropping an entire DTLS
+     datagram if a single record in a datagram is unexpected, instead only
+     drop the record and look at subsequent records (if any are present) in
+     the same datagram. Found by jeannotlapin. #345
+
+= mbed TLS 2.2.0 released 2015-11-04
+
+Security
+   * Fix potential double free if mbedtls_ssl_conf_psk() is called more than
+     once and some allocation fails. Cannot be forced remotely. Found by Guido
+     Vranken, Intelworks.
+   * Fix potential heap corruption on Windows when
+     mbedtls_x509_crt_parse_path() is passed a path longer than 2GB. Cannot be
+     triggered remotely. Found by Guido Vranken, Intelworks.
+   * Fix potential buffer overflow in some asn1_write_xxx() functions.
+     Cannot be triggered remotely unless you create X.509 certificates based
+     on untrusted input or write keys of untrusted origin. Found by Guido
+     Vranken, Intelworks.
+   * The X509 max_pathlen constraint was not enforced on intermediate
+     certificates. Found by Nicholas Wilson, fix and tests provided by
+     Janos Follath. #280 and #319
+
+Features
+   * Experimental support for EC J-PAKE as defined in Thread 1.0.0.
+     Disabled by default as the specification might still change.
+   * Added a key extraction callback to accees the master secret and key
+     block. (Potential uses include EAP-TLS and Thread.)
+
+Bugfix
+   * Self-signed certificates were not excluded from pathlen counting,
+     resulting in some valid X.509 being incorrectly rejected. Found and fix
+     provided by Janos Follath. #319
+   * Fix build error with configurations where ECDHE-PSK is the only key
+     exchange. Found and fix provided by Chris Hammond. #270
+   * Fix build error with configurations where RSA, RSA-PSK, ECDH-RSA or
+     ECHD-ECDSA if the only key exchange. Multiple reports. #310
+   * Fixed a bug causing some handshakes to fail due to some non-fatal alerts
+     not being properly ignored. Found by mancha and Kasom Koht-arsa, #308
+   * mbedtls_x509_crt_verify(_with_profile)() now also checks the key type and
+     size/curve against the profile. Before that, there was no way to set a
+     minimum key size for end-entity certificates with RSA keys. Found by
+     Matthew Page of Scannex Electronics Ltd.
+   * Fix failures in MPI on Sparc(64) due to use of bad assembly code.
+     Found by Kurt Danielson. #292
+   * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314
+   * Fix bug in ASN.1 encoding of booleans that caused generated CA
+     certificates to be rejected by some applications, including OS X
+     Keychain. Found and fixed by Jonathan Leroy, Inikup.
+
+Changes
+   * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1
+     or -1.
+
+= mbed TLS 2.1.2 released 2015-10-06
+
+Security
+   * Added fix for CVE-2015-5291 to prevent heap corruption due to buffer
+     overflow of the hostname or session ticket. Found by Guido Vranken,
+     Intelworks.
+   * Fix potential double-free if mbedtls_ssl_set_hs_psk() is called more than
+     once in the same handhake and mbedtls_ssl_conf_psk() was used.
+     Found and patch provided by Guido Vranken, Intelworks. Cannot be forced
+     remotely.
+   * Fix stack buffer overflow in pkcs12 decryption (used by
+     mbedtls_pk_parse_key(file)() when the password is > 129 bytes.
+     Found by Guido Vranken, Intelworks. Not triggerable remotely.
+   * Fix potential buffer overflow in mbedtls_mpi_read_string().
+     Found by Guido Vranken, Intelworks. Not exploitable remotely in the context
+     of TLS, but might be in other uses. On 32 bit machines, requires reading a
+     string of close to or larger than 1GB to exploit; on 64 bit machines, would
+     require reading a string of close to or larger than 2^62 bytes.
+   * Fix potential random memory allocation in mbedtls_pem_read_buffer()
+     on crafted PEM input data. Found and fix provided by Guido Vranken,
+     Intelworks. Not triggerable remotely in TLS. Triggerable remotely if you
+     accept PEM data from an untrusted source.
+   * Fix possible heap buffer overflow in base64_encoded() when the input
+     buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken,
+     Intelworks. Not trigerrable remotely in TLS.
+   * Fix potential double-free if mbedtls_conf_psk() is called repeatedly on
+     the same mbedtls_ssl_config object and memory allocation fails. Found by
+     Guido Vranken, Intelworks. Cannot be forced remotely.
+   * Fix potential heap buffer overflow in servers that perform client
+     authentication against a crafted CA cert. Cannot be triggered remotely
+     unless you allow third parties to pick trust CAs for client auth.
+     Found by Guido Vranken, Intelworks.
+
+Bugfix
+   * Fix compile error in net.c with musl libc. Found and patch provided by
+     zhasha (#278).
+   * Fix macroization of 'inline' keyword when building as C++. (#279)
+
+Changes
+   * Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure
+     domain names are compliant with RFC 1035.
+   * Fixed paths for check_config.h in example config files. (Found by bachp)
+     (#291)
+
+= mbed TLS 2.1.1 released 2015-09-17
+
+Security
+   * Add countermeasure against Lenstra's RSA-CRT attack for PKCS#1 v1.5
+     signatures. (Found by Florian Weimer, Red Hat.)
+     https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/
+   * Fix possible client-side NULL pointer dereference (read) when the client
+     tries to continue the handshake after it failed (a misuse of the API).
+     (Found and patch provided by Fabian Foerg, Gotham Digital Science using
+     afl-fuzz.)
+
+Bugfix
+   * Fix warning when using a 64bit platform. (found by embedthis) (#275)
+   * Fix off-by-one error in parsing Supported Point Format extension that
+     caused some handshakes to fail.
+
+Changes
+   * Made X509 profile pointer const in mbedtls_ssl_conf_cert_profile() to allow
+     use of mbedtls_x509_crt_profile_next. (found by NWilson)
+   * When a client initiates a reconnect from the same port as a live
+     connection, if cookie verification is available
+     (MBEDTLS_SSL_DTLS_HELLO_VERIFY defined in config.h, and usable cookie
+     callbacks set with mbedtls_ssl_conf_dtls_cookies()), this will be
+     detected and mbedtls_ssl_read() will return
+     MBEDTLS_ERR_SSL_CLIENT_RECONNECT - it is then possible to start a new
+     handshake with the same context. (See RFC 6347 section 4.2.8.)
+
+= mbed TLS 2.1.0 released 2015-09-04
+
+Features
+   * Added support for yotta as a build system.
+   * Primary open source license changed to Apache 2.0 license.
+
+Bugfix
+   * Fix segfault in the benchmark program when benchmarking DHM.
+   * Fix build error with CMake and pre-4.5 versions of GCC (found by Hugo
+     Leisink).
+   * Fix bug when parsing a ServerHello without extensions (found by David
+     Sears).
+   * Fix bug in CMake lists that caused libmbedcrypto.a not to be installed
+     (found by Benoit Lecocq).
+   * Fix bug in Makefile that caused libmbedcrypto and libmbedx509 not to be
+     installed (found by Rawi666).
+   * Fix compile error with armcc 5 with --gnu option.
+   * Fix bug in Makefile that caused programs not to be installed correctly
+     (found by robotanarchy) (#232).
+   * Fix bug in Makefile that prevented from installing without building the
+     tests (found by robotanarchy) (#232).
+   * Fix missing -static-libgcc when building shared libraries for Windows
+     with make.
+   * Fix link error when building shared libraries for Windows with make.
+   * Fix error when loading libmbedtls.so.
+   * Fix bug in mbedtls_ssl_conf_default() that caused the default preset to
+     be always used (found by dcb314) (#235)
+   * Fix bug in mbedtls_rsa_public() and mbedtls_rsa_private() that could
+     result trying to unlock an unlocked mutex on invalid input (found by
+     Fredrik Axelsson) (#257)
+   * Fix -Wshadow warnings (found by hnrkp) (#240)
+   * Fix memory corruption on client with overlong PSK identity, around
+     SSL_MAX_CONTENT_LEN or higher - not triggerrable remotely (found by
+     Aleksandrs Saveljevs) (#238)
+   * Fix unused function warning when using MBEDTLS_MDx_ALT or
+     MBEDTLS_SHAxxx_ALT (found by Henrik) (#239)
+   * Fix memory corruption in pkey programs (found by yankuncheng) (#210)
+
+Changes
+   * The PEM parser now accepts a trailing space at end of lines (#226).
+   * It is now possible to #include a user-provided configuration file at the
+     end of the default config.h by defining MBEDTLS_USER_CONFIG_FILE on the
+     compiler's command line.
+   * When verifying a certificate chain, if an intermediate certificate is
+     trusted, no later cert is checked. (suggested by hannes-landeholm)
+     (#220).
+   * Prepend a "thread identifier" to debug messages (issue pointed out by
+     Hugo Leisink) (#210).
+   * Add mbedtls_ssl_get_max_frag_len() to query the current maximum fragment
+     length.
+
+= mbed TLS 2.0.0 released 2015-07-13
+
+Features
+   * Support for DTLS 1.0 and 1.2 (RFC 6347).
+   * Ability to override core functions from MDx, SHAx, AES and DES modules
+     with custom implementation (eg hardware accelerated), complementing the
+     ability to override the whole module.
+   * New server-side implementation of session tickets that rotate keys to
+     preserve forward secrecy, and allows sharing across multiple contexts.
+   * Added a concept of X.509 cerificate verification profile that controls
+     which algorithms and key sizes (curves for ECDSA) are acceptable.
+   * Expanded configurability of security parameters in the SSL module with
+     mbedtls_ssl_conf_dhm_min_bitlen() and mbedtls_ssl_conf_sig_hashes().
+   * Introduced a concept of presets for SSL security-relevant configuration
+     parameters.
+
+API Changes
+   * The library has been split into libmbedcrypto, libmbedx509, libmbedtls.
+     You now need to link to all of them if you use TLS for example.
+   * All public identifiers moved to the mbedtls_* or MBEDTLS_* namespace.
+     Some names have been further changed to make them more consistent.
+     Migration helpers scripts/rename.pl and include/mbedtls/compat-1.3.h are
+     provided. Full list of renamings in scripts/data_files/rename-1.3-2.0.txt
+   * Renamings of fields inside structures, not covered by the previous list:
+     mbedtls_cipher_info_t.key_length -> key_bitlen
+     mbedtls_cipher_context_t.key_length -> key_bitlen
+     mbedtls_ecp_curve_info.size -> bit_size
+   * Headers are now found in the 'mbedtls' directory (previously 'polarssl').
+   * The following _init() functions that could return errors have
+     been split into an _init() that returns void and another function that
+     should generally be the first function called on this context after init:
+     mbedtls_ssl_init() -> mbedtls_ssl_setup()
+     mbedtls_ccm_init() -> mbedtls_ccm_setkey()
+     mbedtls_gcm_init() -> mbedtls_gcm_setkey()
+     mbedtls_hmac_drbg_init() -> mbedtls_hmac_drbg_seed(_buf)()
+     mbedtls_ctr_drbg_init()  -> mbedtls_ctr_drbg_seed()
+     Note that for mbedtls_ssl_setup(), you need to be done setting up the
+     ssl_config structure before calling it.
+   * Most ssl_set_xxx() functions (all except ssl_set_bio(), ssl_set_hostname(),
+     ssl_set_session() and ssl_set_client_transport_id(), plus
+     ssl_legacy_renegotiation()) have been renamed to mbedtls_ssl_conf_xxx()
+     (see rename.pl and compat-1.3.h above) and their first argument's type
+     changed from ssl_context to ssl_config.
+   * ssl_set_bio() changed signature (contexts merged, order switched, one
+     additional callback for read-with-timeout).
+   * The following functions have been introduced and must be used in callback
+     implementations (SNI, PSK) instead of their *conf counterparts:
+     mbedtls_ssl_set_hs_own_cert()
+     mbedtls_ssl_set_hs_ca_chain()
+     mbedtls_ssl_set_hs_psk()
+   * mbedtls_ssl_conf_ca_chain() lost its last argument (peer_cn), now set
+     using mbedtls_ssl_set_hostname().
+   * mbedtls_ssl_conf_session_cache() changed prototype (only one context
+     pointer, parameters reordered).
+   * On server, mbedtls_ssl_conf_session_tickets_cb() must now be used in
+     place of mbedtls_ssl_conf_session_tickets() to enable session tickets.
+   * The SSL debug callback gained two new arguments (file name, line number).
+   * Debug modes were removed.
+   * mbedtls_ssl_conf_truncated_hmac() now returns void.
+   * mbedtls_memory_buffer_alloc_init() now returns void.
+   * X.509 verification flags are now an uint32_t. Affect the signature of:
+     mbedtls_ssl_get_verify_result()
+     mbedtls_x509_ctr_verify_info()
+     mbedtls_x509_crt_verify() (flags, f_vrfy -> needs to be updated)
+     mbedtls_ssl_conf_verify() (f_vrfy -> needs to be updated)
+   * The following functions changed prototype to avoid an in-out length
+     parameter:
+     mbedtls_base64_encode()
+     mbedtls_base64_decode()
+     mbedtls_mpi_write_string()
+     mbedtls_dhm_calc_secret()
+   * In the NET module, all "int" and "int *" arguments for file descriptors
+     changed type to "mbedtls_net_context *".
+   * net_accept() gained new arguments for the size of the client_ip buffer.
+   * In the threading layer, mbedtls_mutex_init() and mbedtls_mutex_free() now
+     return void.
+   * ecdsa_write_signature() gained an additional md_alg argument and
+     ecdsa_write_signature_det() was deprecated.
+   * pk_sign() no longer accepts md_alg == POLARSSL_MD_NONE with ECDSA.
+   * Last argument of x509_crt_check_key_usage() and
+     mbedtls_x509write_crt_set_key_usage() changed from int to unsigned.
+   * test_ca_list (from certs.h) is renamed to test_cas_pem and is only
+     available if POLARSSL_PEM_PARSE_C is defined (it never worked without).
+   * Test certificates in certs.c are no longer guaranteed to be nul-terminated
+     strings; use the new *_len variables instead of strlen().
+   * Functions mbedtls_x509_xxx_parse(), mbedtls_pk_parse_key(),
+     mbedtls_pk_parse_public_key() and mbedtls_dhm_parse_dhm() now expect the
+     length parameter to include the terminating null byte for PEM input.
+   * Signature of mpi_mul_mpi() changed to make the last argument unsigned
+   * calloc() is now used instead of malloc() everywhere. API of platform
+     layer and the memory_buffer_alloc module changed accordingly.
+     (Thanks to Mansour Moufid for helping with the replacement.)
+   * Change SSL_DISABLE_RENEGOTIATION config.h flag to SSL_RENEGOTIATION
+     (support for renegotiation now needs explicit enabling in config.h).
+   * Split MBEDTLS_HAVE_TIME into MBEDTLS_HAVE_TIME and MBEDTLS_HAVE_TIME_DATE
+     in config.h
+   * net_connect() and net_bind() have a new 'proto' argument to choose
+     between TCP and UDP, using the macros NET_PROTO_TCP or NET_PROTO_UDP.
+     Their 'port' argument type is changed to a string.
+   * Some constness fixes
+
+Removals
+   * Removed mbedtls_ecp_group_read_string(). Only named groups are supported.
+   * Removed mbedtls_ecp_sub() and mbedtls_ecp_add(), use
+     mbedtls_ecp_muladd().
+   * Removed individual mdX_hmac, shaX_hmac, mdX_file and shaX_file functions
+     (use generic functions from md.h)
+   * Removed mbedtls_timing_msleep(). Use mbedtls_net_usleep() or a custom
+     waiting function.
+   * Removed test DHM parameters from the test certs module.
+   * Removed the PBKDF2 module (use PKCS5).
+   * Removed POLARSSL_ERROR_STRERROR_BC (use mbedtls_strerror()).
+   * Removed compat-1.2.h (helper for migrating from 1.2 to 1.3).
+   * Removed openssl.h (very partial OpenSSL compatibility layer).
+   * Configuration options POLARSSL_HAVE_LONGLONG was removed (now always on).
+   * Configuration options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 have
+     been removed (compiler is required to support 32-bit operations).
+   * Configuration option POLARSSL_HAVE_IPV6 was removed (always enabled).
+   * Removed test program o_p_test, the script compat.sh does more.
+   * Removed test program ssl_test, superseded by ssl-opt.sh.
+   * Removed helper script active-config.pl
+
+New deprecations
+   * md_init_ctx() is deprecated in favour of md_setup(), that adds a third
+     argument (allowing memory savings if HMAC is not used)
+
+Semi-API changes (technically public, morally private)
+   * Renamed a few headers to include _internal in the name. Those headers are
+     not supposed to be included by users.
+   * Changed md_info_t into an opaque structure (use md_get_xxx() accessors).
+   * Changed pk_info_t into an opaque structure.
+   * Changed cipher_base_t into an opaque structure.
+   * Removed sig_oid2 and rename sig_oid1 to sig_oid in x509_crt and x509_crl.
+   * x509_crt.key_usage changed from unsigned char to unsigned int.
+   * Removed r and s from ecdsa_context
+   * Removed mode from des_context and des3_context
+
+Default behavior changes
+   * The default minimum TLS version is now TLS 1.0.
+   * RC4 is now blacklisted by default in the SSL/TLS layer, and excluded from the
+     default ciphersuite list returned by ssl_list_ciphersuites()
+   * Support for receiving SSLv2 ClientHello is now disabled by default at
+     compile time.
+   * The default authmode for SSL/TLS clients is now REQUIRED.
+   * Support for RSA_ALT contexts in the PK layer is now optional. Since is is
+     enabled in the default configuration, this is only noticeable if using a
+     custom config.h
+   * Default DHM parameters server-side upgraded from 1024 to 2048 bits.
+   * A minimum RSA key size of 2048 bits is now enforced during ceritificate
+     chain verification.
+   * Negotiation of truncated HMAC is now disabled by default on server too.
+   * The following functions are now case-sensitive:
+     mbedtls_cipher_info_from_string()
+     mbedtls_ecp_curve_info_from_name()
+     mbedtls_md_info_from_string()
+     mbedtls_ssl_ciphersuite_from_string()
+     mbedtls_version_check_feature()
+
+Requirement changes
+   * The minimum MSVC version required is now 2010 (better C99 support).
+   * The NET layer now unconditionnaly relies on getaddrinfo() and select().
+   * Compiler is required to support C99 types such as long long and uint32_t.
+
+API changes from the 1.4 preview branch
+   * ssl_set_bio_timeout() was removed, split into mbedtls_ssl_set_bio() with
+     new prototype, and mbedtls_ssl_set_read_timeout().
+   * The following functions now return void:
+     mbedtls_ssl_conf_transport()
+     mbedtls_ssl_conf_max_version()
+     mbedtls_ssl_conf_min_version()
+   * DTLS no longer hard-depends on TIMING_C, but uses a callback interface
+     instead, see mbedtls_ssl_set_timer_cb(), with the Timing module providing
+     an example implementation, see mbedtls_timing_delay_context and
+     mbedtls_timing_set/get_delay().
+   * With UDP sockets, it is no longer necessary to call net_bind() again
+     after a successful net_accept().
+
+Changes
+   * mbedtls_ctr_drbg_random() and mbedtls_hmac_drbg_random() are now
+     thread-safe if MBEDTLS_THREADING_C is enabled.
+   * Reduced ROM fooprint of SHA-256 and added an option to reduce it even
+     more (at the expense of performance) MBEDTLS_SHA256_SMALLER.
+
+= mbed TLS 1.3 branch
+
+Security
+   * With authmode set to SSL_VERIFY_OPTIONAL, verification of keyUsage and
+     extendedKeyUsage on the leaf certificate was lost (results not accessible
+     via ssl_get_verify_results()).
+   * Add countermeasure against "Lucky 13 strikes back" cache-based attack,
+     https://dl.acm.org/citation.cfm?id=2714625
+
+Features
+   * Improve ECC performance by using more efficient doubling formulas
+     (contributed by Peter Dettman).
+   * Add x509_crt_verify_info() to display certificate verification results.
+   * Add support for reading DH parameters with privateValueLength included
+     (contributed by Daniel Kahn Gillmor).
+   * Add support for bit strings in X.509 names (request by Fredrik Axelsson).
+   * Add support for id-at-uniqueIdentifier in X.509 names.
+   * Add support for overriding snprintf() (except on Windows) and exit() in
+     the platform layer.
+   * Add an option to use macros instead of function pointers in the platform
+     layer (helps get rid of unwanted references).
+   * Improved Makefiles for Windows targets by fixing library targets and making
+     cross-compilation easier (thanks to Alon Bar-Lev).
+   * The benchmark program also prints heap usage for public-key primitives
+     if POLARSSL_MEMORY_BUFFER_ALLOC_C and POLARSSL_MEMORY_DEBUG are defined.
+   * New script ecc-heap.sh helps measuring the impact of ECC parameters on
+     speed and RAM (heap only for now) usage.
+   * New script memory.sh helps measuring the ROM and RAM requirements of two
+     reduced configurations (PSK-CCM and NSA suite B).
+   * Add config flag POLARSSL_DEPRECATED_WARNING (off by default) to produce
+     warnings on use of deprecated functions (with GCC and Clang only).
+   * Add config flag POLARSSL_DEPRECATED_REMOVED (off by default) to produce
+     errors on use of deprecated functions.
+
+Bugfix
+   * Fix compile errors with PLATFORM_NO_STD_FUNCTIONS.
+   * Fix compile error with PLATFORM_EXIT_ALT (thanks to Rafał Przywara).
+   * Fix bug in entropy.c when THREADING_C is also enabled that caused
+     entropy_free() to crash (thanks to Rafał Przywara).
+   * Fix memory leak when gcm_setkey() and ccm_setkey() are used more than
+     once on the same context.
+   * Fix bug in ssl_mail_client when password is longer that username (found
+     by Bruno Pape).
+   * Fix undefined behaviour (memcmp( NULL, NULL, 0 );) in X.509 modules
+     (detected by Clang's 3.6 UBSan).
+   * mpi_size() and mpi_msb() would segfault when called on an mpi that is
+     initialized but not set (found by pravic).
+   * Fix detection of support for getrandom() on Linux (reported by syzzer) by
+     doing it at runtime (using uname) rather that compile time.
+   * Fix handling of symlinks by "make install" (found by Gaël PORTAY).
+   * Fix potential NULL pointer dereference (not trigerrable remotely) when
+     ssl_write() is called before the handshake is finished (introduced in
+     1.3.10) (first reported by Martin Blumenstingl).
+   * Fix bug in pk_parse_key() that caused some valid private EC keys to be
+     rejected.
+   * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos).
+   * Fix thread safety bug in RSA operations (found by Fredrik Axelsson).
+   * Fix hardclock() (only used in the benchmarking program) with some
+     versions of mingw64 (found by kxjhlele).
+   * Fix warnings from mingw64 in timing.c (found by kxjklele).
+   * Fix potential unintended sign extension in asn1_get_len() on 64-bit
+     platforms.
+   * Fix potential memory leak in ssl_set_psk() (found by Mansour Moufid).
+   * Fix compile error when POLARSSL_SSL_DISABLE_RENEGOTATION and
+     POLARSSL_SSL_SSESSION_TICKETS where both enabled in config.h (introduced
+     in 1.3.10).
+   * Add missing extern "C" guard in aesni.h (reported by amir zamani).
+   * Add missing dependency on SHA-256 in some x509 programs (reported by
+     Gergely Budai).
+   * Fix bug related to ssl_set_curves(): the client didn't check that the
+     curve picked by the server was actually allowed.
+
+Changes
+   * Remove bias in mpi_gen_prime (contributed by Pascal Junod).
+   * Remove potential sources of timing variations (some contributed by Pascal
+     Junod).
+   * Options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 are deprecated.
+   * Enabling POLARSSL_NET_C without POLARSSL_HAVE_IPV6 is deprecated.
+   * compat-1.2.h and openssl.h are deprecated.
+   * Adjusting/overriding CFLAGS and LDFLAGS with the make build system is now
+     more flexible (warning: OFLAGS is not used any more) (see the README)
+     (contributed by Alon Bar-Lev).
+   * ssl_set_own_cert() no longer calls pk_check_pair() since the
+     performance impact was bad for some users (this was introduced in 1.3.10).
+   * Move from SHA-1 to SHA-256 in example programs using signatures
+     (suggested by Thorsten Mühlfelder).
+   * Remove some unneeded inclusions of header files from the standard library
+     "minimize" others (eg use stddef.h if only size_t is needed).
+   * Change #include lines in test files to use double quotes instead of angle
+     brackets for uniformity with the rest of the code.
+   * Remove dependency on sscanf() in X.509 parsing modules.
+
+= mbed TLS 1.3.10 released 2015-02-09
+Security
+   * NULL pointer dereference in the buffer-based allocator when the buffer is
+     full and polarssl_free() is called (found by Mark Hasemeyer)
+     (only possible if POLARSSL_MEMORY_BUFFER_ALLOC_C is enabled, which it is
+     not by default).
+   * Fix remotely-triggerable uninitialised pointer dereference caused by
+     crafted X.509 certificate (TLS server is not affected if it doesn't ask for a
+     client certificate) (found using Codenomicon Defensics).
+   * Fix remotely-triggerable memory leak caused by crafted X.509 certificates
+     (TLS server is not affected if it doesn't ask for a client certificate)
+     (found using Codenomicon Defensics).
+   * Fix potential stack overflow while parsing crafted X.509 certificates
+     (TLS server is not affected if it doesn't ask for a client certificate)
+     (found using Codenomicon Defensics).
+   * Fix timing difference that could theoretically lead to a
+     Bleichenbacher-style attack in the RSA and RSA-PSK key exchanges
+     (reported by Sebastian Schinzel).
+
+Features
+   * Add support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv).
+   * Add support for Extended Master Secret (draft-ietf-tls-session-hash).
+   * Add support for Encrypt-then-MAC (RFC 7366).
+   * Add function pk_check_pair() to test if public and private keys match.
+   * Add x509_crl_parse_der().
+   * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the
+     length of an X.509 verification chain.
+   * Support for renegotiation can now be disabled at compile-time
+   * Support for 1/n-1 record splitting, a countermeasure against BEAST.
+   * Certificate selection based on signature hash, preferring SHA-1 over SHA-2
+     for pre-1.2 clients when multiple certificates are available.
+   * Add support for getrandom() syscall on recent Linux kernels with Glibc or
+     a compatible enough libc (eg uClibc).
+   * Add ssl_set_arc4_support() to make it easier to disable RC4 at runtime
+     while using the default ciphersuite list.
+   * Added new error codes and debug messages about selection of
+     ciphersuite/certificate.
+
+Bugfix
+   * Stack buffer overflow if ctr_drbg_update() is called with too large
+     add_len (found by Jean-Philippe Aumasson) (not triggerable remotely).
+   * Possible buffer overflow of length at most POLARSSL_MEMORY_ALIGN_MULTIPLE
+     if memory_buffer_alloc_init() was called with buf not aligned and len not
+     a multiple of POLARSSL_MEMORY_ALIGN_MULTIPLE (not triggerable remotely).
+   * User set CFLAGS were ignored by Cmake with gcc (introduced in 1.3.9, found
+     by Julian Ospald).
+   * Fix potential undefined behaviour in Camellia.
+   * Fix potential failure in ECDSA signatures when POLARSSL_ECP_MAX_BITS is a
+     multiple of 8 (found by Gergely Budai).
+   * Fix unchecked return code in x509_crt_parse_path() on Windows (found by
+     Peter Vaskovic).
+   * Fix assembly selection for MIPS64 (thanks to James Cowgill).
+   * ssl_get_verify_result() now works even if the handshake was aborted due
+     to a failed verification (found by Fredrik Axelsson).
+   * Skip writing and parsing signature_algorithm extension if none of the
+     key exchanges enabled needs certificates. This fixes a possible interop
+     issue with some servers when a zero-length extension was sent. (Reported
+     by Peter Dettman.)
+   * On a 0-length input, base64_encode() did not correctly set output length
+     (found by Hendrik van den Boogaard).
+
+Changes
+   * Use deterministic nonces for AEAD ciphers in TLS by default (possible to
+     switch back to random with POLARSSL_SSL_AEAD_RANDOM_IV in config.h).
+   * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined.
+   * ssl_set_own_cert() now returns an error on key-certificate mismatch.
+   * Forbid repeated extensions in X.509 certificates.
+   * debug_print_buf() now prints a text view in addition to hexadecimal.
+   * A specific error is now returned when there are ciphersuites in common
+     but none of them is usable due to external factors such as no certificate
+     with a suitable (extended)KeyUsage or curve or no PSK set.
+   * It is now possible to disable negotiation of truncated HMAC server-side
+     at runtime with ssl_set_truncated_hmac().
+   * Example programs for SSL client and server now disable SSLv3 by default.
+   * Example programs for SSL client and server now disable RC4 by default.
+   * Use platform.h in all test suites and programs.
+
+= PolarSSL 1.3.9 released 2014-10-20
+Security
+   * Lowest common hash was selected from signature_algorithms extension in
+     TLS 1.2 (found by Darren Bane) (introduced in 1.3.8).
+   * Remotely-triggerable memory leak when parsing some X.509 certificates
+     (server is not affected if it doesn't ask for a client certificate)
+     (found using Codenomicon Defensics).
+   * Remotely-triggerable memory leak when parsing crafted ClientHello
+     (not affected if ECC support was compiled out) (found using Codenomicon
+     Defensics).
+
+Bugfix
+   * Support escaping of commas in x509_string_to_names()
+   * Fix compile error in ssl_pthread_server (found by Julian Ospald).
+   * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce).
+   * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel).
+   * Fix warnings from Clang's scan-build (contributed by Alfred Klomp).
+   * Fix compile error in timing.c when POLARSSL_NET_C and POLARSSL_SELFTEST
+     are defined but not POLARSSL_HAVE_TIME (found by Stephane Di Vito).
+   * Remove non-existent file from VS projects (found by Peter Vaskovic).
+   * ssl_read() could return non-application data records on server while
+     renegotation was pending, and on client when a HelloRequest was received.
+   * Server-initiated renegotiation would fail with non-blocking I/O if the
+     write callback returned WANT_WRITE when requesting renegotiation.
+   * ssl_close_notify() could send more than one message in some circumstances
+     with non-blocking I/O.
+   * Fix compiler warnings on iOS (found by Sander Niemeijer).
+   * x509_crt_parse() did not increase total_failed on PEM error
+   * Fix compile error with armcc in mpi_is_prime()
+   * Fix potential bad read in parsing ServerHello (found by Adrien
+     Vialletelle).
+
+Changes
+   * Ciphersuites using SHA-256 or SHA-384 now require TLS 1.x (there is no
+     standard defining how to use SHA-2 with SSL 3.0).
+   * Ciphersuites using RSA-PSK key exchange new require TLS 1.x (the spec is
+     ambiguous on how to encode some packets with SSL 3.0).
+   * Made buffer size in pk_write_(pub)key_pem() more dynamic, eg smaller if
+     RSA is disabled, larger if POLARSSL_MPI_MAX_SIZE is larger.
+   * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than
+     POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
+   * POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits
+     RSA keys.
+   * Accept spaces at end of line or end of buffer in base64_decode().
+   * X.509 certificates with more than one AttributeTypeAndValue per
+     RelativeDistinguishedName are not accepted any more.
+
+= PolarSSL 1.3.8 released 2014-07-11
+Security
+   * Fix length checking for AEAD ciphersuites (found by Codenomicon).
+     It was possible to crash the server (and client) using crafted messages
+     when a GCM suite was chosen.
+
+Features
+   * Add CCM module and cipher mode to Cipher Layer
+   * Support for CCM and CCM_8 ciphersuites
+   * Support for parsing and verifying RSASSA-PSS signatures in the X.509
+     modules (certificates, CRLs and CSRs).
+   * Blowfish in the cipher layer now supports variable length keys.
+   * Add example config.h for PSK with CCM, optimized for low RAM usage.
+   * Optimize for RAM usage in example config.h for NSA Suite B profile.
+   * Add POLARSSL_REMOVE_ARC4_CIPHERSUITES to allow removing RC4 ciphersuites
+     from the default list (inactive by default).
+   * Add server-side enforcement of sent renegotiation requests
+     (ssl_set_renegotiation_enforced())
+   * Add SSL_CIPHERSUITES config.h flag to allow specifying a list of
+     ciphersuites to use and save some memory if the list is small.
+
+Changes
+   * Add LINK_WITH_PTHREAD option in CMake for explicit linking that is
+     required on some platforms (e.g. OpenBSD)
+   * Migrate zeroizing of data to polarssl_zeroize() instead of memset()
+     against unwanted compiler optimizations
+   * md_list() now returns hashes strongest first
+   * Selection of hash for signing ServerKeyExchange in TLS 1.2 now picks
+     strongest offered by client.
+   * All public contexts have _init() and _free() functions now for simpler
+     usage pattern
+
+Bugfix
+   * Fix in debug_print_msg()
+   * Enforce alignment in the buffer allocator even if buffer is not aligned
+   * Remove less-than-zero checks on unsigned numbers
+   * Stricter check on SSL ClientHello internal sizes compared to actual packet
+     size (found by TrustInSoft)
+   * Fix WSAStartup() return value check (found by Peter Vaskovic)
+   * Other minor issues (found by Peter Vaskovic)
+   * Fix symlink command for cross compiling with CMake (found by Andre
+     Heinecke)
+   * Fix DER output of gen_key app (found by Gergely Budai)
+   * Very small records were incorrectly rejected when truncated HMAC was in
+     use with some ciphersuites and versions (RC4 in all versions, CBC with
+     versions < TLS 1.1).
+   * Very large records using more than 224 bytes of padding were incorrectly
+     rejected with CBC-based ciphersuites and TLS >= 1.1
+   * Very large records using less padding could cause a buffer overread of up
+     to 32 bytes with CBC-based ciphersuites and TLS >= 1.1
+   * Restore ability to use a v1 cert as a CA if trusted locally. (This had
+     been removed in 1.3.6.)
+   * Restore ability to locally trust a self-signed cert that is not a proper
+     CA for use as an end entity certificate. (This had been removed in
+     1.3.6.)
+   * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan).
+   * Use \n\t rather than semicolons for bn_mul asm, since some assemblers
+     interpret semicolons as comment delimiters (found by Barry K. Nathan).
+   * Fix off-by-one error in parsing Supported Point Format extension that
+     caused some handshakes to fail.
+   * Fix possible miscomputation of the premaster secret with DHE-PSK key
+     exchange that caused some handshakes to fail with other implementations.
+     (Failure rate <= 1/255 with common DHM moduli.)
+   * Disable broken Sparc64 bn_mul assembly (found by Florian Obser).
+   * Fix base64_decode() to return and check length correctly (in case of
+     tight buffers)
+   * Fix mpi_write_string() to write "00" as hex output for empty MPI (found
+     by Hui Dong)
+
+= PolarSSL 1.3.7 released on 2014-05-02
+Features
+   * debug_set_log_mode() added to determine raw or full logging
+   * debug_set_threshold() added to ignore messages over threshold level
+   * version_check_feature() added to check for compile-time options at
+     run-time
+
+Changes
+   * POLARSSL_CONFIG_OPTIONS has been removed. All values are individually
+     checked and filled in the relevant module headers
+   * Debug module only outputs full lines instead of parts
+   * Better support for the different Attribute Types from IETF PKIX (RFC 5280)
+   * AES-NI now compiles with "old" assemblers too
+   * Ciphersuites based on RC4 now have the lowest priority by default
+
+Bugfix
+   * Only iterate over actual certificates in ssl_write_certificate_request()
+     (found by Matthew Page)
+   * Typos in platform.c and pkcs11.c (found by Daniel Phillips and Steffan
+     Karger)
+   * cert_write app should use subject of issuer certificate as issuer of cert
+   * Fix false reject in padding check in ssl_decrypt_buf() for CBC
+     ciphersuites, for full SSL frames of data.
+   * Improve interoperability by not writing extension length in ClientHello /
+     ServerHello when no extensions are present (found by Matthew Page)
+   * rsa_check_pubkey() now allows an E up to N
+   * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings
+   * mpi_fill_random() was creating numbers larger than requested on
+     big-endian platform when size was not an integer number of limbs
+   * Fix dependencies issues in X.509 test suite.
+   * Some parts of ssl_tls.c were compiled even when the module was disabled.
+   * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer)
+   * Fix detection of Clang on some Apple platforms with CMake
+     (found by Barry K. Nathan)
+
+= PolarSSL 1.3.6 released on 2014-04-11
+
+Features
+   * Support for the ALPN SSL extension
+   * Add option 'use_dev_random' to gen_key application
+   * Enable verification of the keyUsage extension for CA and leaf
+     certificates (POLARSSL_X509_CHECK_KEY_USAGE)
+   * Enable verification of the extendedKeyUsage extension
+     (POLARSSL_X509_CHECK_EXTENDED_KEY_USAGE)
+
+Changes
+   * x509_crt_info() now prints information about parsed extensions as well
+   * pk_verify() now returns a specific error code when the signature is valid
+     but shorter than the supplied length.
+   * Use UTC time to check certificate validity.
+   * Reject certificates with times not in UTC, per RFC 5280.
+
+Security
+   * Avoid potential timing leak in ecdsa_sign() by blinding modular division.
+     (Found by Watson Ladd.)
+   * The notAfter date of some certificates was no longer checked since 1.3.5.
+     This affects certificates in the user-supplied chain except the top
+     certificate. If the user-supplied chain contains only one certificates,
+     it is not affected (ie, its notAfter date is properly checked).
+   * Prevent potential NULL pointer dereference in ssl_read_record() (found by
+     TrustInSoft)
+
+Bugfix
+   * The length of various ClientKeyExchange messages was not properly checked.
+   * Some example server programs were not sending the close_notify alert.
+   * Potential memory leak in mpi_exp_mod() when error occurs during
+     calculation of RR.
+   * Fixed malloc/free default #define in platform.c (found by Gergely Budai).
+   * Fixed type which made POLARSSL_ENTROPY_FORCE_SHA256 uneffective (found by
+     Gergely Budai).
+   * Fix #include path in ecdsa.h which wasn't accepted by some compilers.
+     (found by Gergely Budai)
+   * Fix compile errors when POLARSSL_ERROR_STRERROR_BC is undefined (found by
+     Shuo Chen).
+   * oid_get_numeric_string() used to truncate the output without returning an
+     error if the output buffer was just 1 byte too small.
+   * dhm_parse_dhm() (hence dhm_parse_dhmfile()) did not set dhm->len.
+   * Calling pk_debug() on an RSA-alt key would segfault.
+   * pk_get_size() and pk_get_len() were off by a factor 8 for RSA-alt keys.
+   * Potential buffer overwrite in pem_write_buffer() because of low length
+     indication (found by Thijs Alkemade)
+   * EC curves constants, which should be only in ROM since 1.3.3, were also
+     stored in RAM due to missing 'const's (found by Gergely Budai).
+
+= PolarSSL 1.3.5 released on 2014-03-26
+Features
+   * HMAC-DRBG as a separate module
+   * Option to set the Curve preference order (disabled by default)
+   * Single Platform compatilibity layer (for memory / printf / fprintf)
+   * Ability to provide alternate timing implementation
+   * Ability to force the entropy module to use SHA-256 as its basis
+     (POLARSSL_ENTROPY_FORCE_SHA256)
+   * Testing script ssl-opt.sh added for testing 'live' ssl option
+     interoperability against OpenSSL and PolarSSL
+   * Support for reading EC keys that use SpecifiedECDomain in some cases.
+   * Entropy module now supports seed writing and reading
+
+Changes
+   * Deprecated the Memory layer
+   * entropy_add_source(), entropy_update_manual() and entropy_gather()
+     now thread-safe if POLARSSL_THREADING_C defined
+   * Improvements to the CMake build system, contributed by Julian Ospald.
+   * Work around a bug of the version of Clang shipped by Apple with Mavericks
+     that prevented bignum.c from compiling. (Reported by Rafael Baptista.)
+   * Revamped the compat.sh interoperatibility script to include support for
+     testing against GnuTLS
+   * Deprecated ssl_set_own_cert_rsa() and ssl_set_own_cert_rsa_alt()
+   * Improvements to tests/Makefile, contributed by Oden Eriksson.
+
+Security
+   * Forbid change of server certificate during renegotiation to prevent
+     "triple handshake" attack when authentication mode is 'optional' (the
+     attack was already impossible when authentication is required).
+   * Check notBefore timestamp of certificates and CRLs from the future.
+   * Forbid sequence number wrapping
+   * Fixed possible buffer overflow with overlong PSK
+   * Possible remotely-triggered out-of-bounds memory access fixed (found by
+     TrustInSoft)
+
+Bugfix
+   * ecp_gen_keypair() does more tries to prevent failure because of
+     statistics
+   * Fixed bug in RSA PKCS#1 v1.5 "reversed" operations
+   * Fixed testing with out-of-source builds using cmake
+   * Fixed version-major intolerance in server
+   * Fixed CMake symlinking on out-of-source builds
+   * Fixed dependency issues in test suite
+   * Programs rsa_sign_pss and rsa_verify_pss were not using PSS since 1.3.0
+   * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by
+     Alex Wilson.)
+   * ssl_cache was creating entries when max_entries=0 if TIMING_C was enabled.
+   * m_sleep() was sleeping twice too long on most Unix platforms.
+   * Fixed bug with session tickets and non-blocking I/O in the unlikely case
+     send() would return an EAGAIN error when sending the ticket.
+   * ssl_cache was leaking memory when reusing a timed out entry containing a
+     client certificate.
+   * ssl_srv was leaking memory when client presented a timed out ticket
+     containing a client certificate
+   * ssl_init() was leaving a dirty pointer in ssl_context if malloc of
+     out_ctr failed
+   * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc
+     of one of them failed
+   * Fix typo in rsa_copy() that impacted PKCS#1 v2 contexts
+   * x509_get_current_time() uses localtime_r() to prevent thread issues
+
+= PolarSSL 1.3.4 released on 2014-01-27
+Features
+   * Support for the Koblitz curves: secp192k1, secp224k1, secp256k1
+   * Support for RIPEMD-160
+   * Support for AES CFB8 mode
+   * Support for deterministic ECDSA (RFC 6979)
+
+Bugfix
+   * Potential memory leak in bignum_selftest()
+   * Replaced expired test certificate
+   * ssl_mail_client now terminates lines with CRLF, instead of LF
+   * net module handles timeouts on blocking sockets better (found by Tilman
+     Sauerbeck)
+   * Assembly format fixes in bn_mul.h
+
+Security
+   * Missing MPI_CHK calls added around unguarded mpi calls (found by
+     TrustInSoft)
+
+= PolarSSL 1.3.3 released on 2013-12-31
+Features
+   * EC key generation support in gen_key app
+   * Support for adhering to client ciphersuite order preference
+     (POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
+   * Support for Curve25519
+   * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites
+   * Support for IPv6 in the NET module
+   * AES-NI support for AES, AES-GCM and AES key scheduling
+   * SSL Pthread-based server example added (ssl_pthread_server)
+
+Changes
+   * gen_prime() speedup
+   * Speedup of ECP multiplication operation
+   * Relaxed some SHA2 ciphersuite's version requirements
+   * Dropped use of readdir_r() instead of readdir() with threading support
+   * More constant-time checks in the RSA module
+   * Split off curves from ecp.c into ecp_curves.c
+   * Curves are now stored fully in ROM
+   * Memory usage optimizations in ECP module
+   * Removed POLARSSL_THREADING_DUMMY
+
+Bugfix
+   * Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int
+   * Fixed X.509 hostname comparison (with non-regular characters)
+   * SSL now gracefully handles missing RNG
+   * Missing defines / cases for RSA_PSK key exchange
+   * crypt_and_hash app checks MAC before final decryption
+   * Potential memory leak in ssl_ticket_keys_init()
+   * Memory leak in benchmark application
+   * Fixed x509_crt_parse_path() bug on Windows platforms
+   * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by
+     TrustInSoft)
+   * Fixed potential overflow in certificate size verification in
+     ssl_write_certificate() (found by TrustInSoft)
+
+Security
+   * Possible remotely-triggered out-of-bounds memory access fixed (found by
+     TrustInSoft)
+
+= PolarSSL 1.3.2 released on 2013-11-04
+Features
+   * PK tests added to test framework
+   * Added optional optimization for NIST MODP curves (POLARSSL_ECP_NIST_OPTIM)
+   * Support for Camellia-GCM mode and ciphersuites
+
+Changes
+   * Padding checks in cipher layer are now constant-time
+   * Value comparisons in SSL layer are now constant-time
+   * Support for serialNumber, postalAddress and postalCode in X509 names
+   * SSL Renegotiation was refactored
+
+Bugfix
+   * More stringent checks in cipher layer
+   * Server does not send out extensions not advertised by client
+   * Prevent possible alignment warnings on casting from char * to 'aligned *'
+   * Misc fixes and additions to dependency checks
+   * Const correctness
+   * cert_write with selfsign should use issuer_name as subject_name
+   * Fix ECDSA corner case: missing reduction mod N (found by DualTachyon)
+   * Defines to handle UEFI environment under MSVC
+   * Server-side initiated renegotiations send HelloRequest
+
+= PolarSSL 1.3.1 released on 2013-10-15
+Features
+   * Support for Brainpool curves and TLS ciphersuites (RFC 7027)
+   * Support for ECDHE-PSK key-exchange and ciphersuites
+   * Support for RSA-PSK key-exchange and ciphersuites
+
+Changes
+   * RSA blinding locks for a smaller amount of time
+   * TLS compression only allocates working buffer once
+   * Introduced POLARSSL_HAVE_READDIR_R for systems without it
+   * config.h is more script-friendly
+
+Bugfix
+   * Missing MSVC defines added
+   * Compile errors with POLARSSL_RSA_NO_CRT
+   * Header files with 'polarssl/'
+   * Const correctness
+   * Possible naming collision in dhm_context
+   * Better support for MSVC
+   * threading_set_alt() name
+   * Added missing x509write_crt_set_version()
+
+= PolarSSL 1.3.0 released on 2013-10-01
+Features
+   * Elliptic Curve Cryptography module added
+   * Elliptic Curve Diffie Hellman module added
+   * Ephemeral Elliptic Curve Diffie Hellman support for SSL/TLS
+    (ECDHE-based ciphersuites)
+   * Ephemeral Elliptic Curve Digital Signature Algorithm support for SSL/TLS
+    (ECDSA-based ciphersuites)
+   * Ability to specify allowed ciphersuites based on the protocol version.
+   * PSK and DHE-PSK based ciphersuites added
+   * Memory allocation abstraction layer added
+   * Buffer-based memory allocator added (no malloc() / free() / HEAP usage)
+   * Threading abstraction layer added (dummy / pthread / alternate)
+   * Public Key abstraction layer added
+   * Parsing Elliptic Curve keys
+   * Parsing Elliptic Curve certificates
+   * Support for max_fragment_length extension (RFC 6066)
+   * Support for truncated_hmac extension (RFC 6066)
+   * Support for zeros-and-length (ANSI X.923) padding, one-and-zeros
+     (ISO/IEC 7816-4) padding and zero padding in the cipher layer
+   * Support for session tickets (RFC 5077)
+   * Certificate Request (CSR) generation with extensions (key_usage,
+     ns_cert_type)
+   * X509 Certificate writing with extensions (basic_constraints,
+     issuer_key_identifier, etc)
+   * Optional blinding for RSA, DHM and EC
+   * Support for multiple active certificate / key pairs in SSL servers for
+     the same host (Not to be confused with SNI!)
+
+Changes
+   * Ability to enable / disable SSL v3 / TLS 1.0 / TLS 1.1 / TLS 1.2
+     individually
+   * Introduced separate SSL Ciphersuites module that is based on
+     Cipher and MD information
+   * Internals for SSL module adapted to have separate IV pointer that is
+     dynamically set (Better support for hardware acceleration)
+   * Moved all OID functionality to a separate module. RSA function
+     prototypes for the RSA sign and verify functions changed as a result
+   * Split up the GCM module into a starts/update/finish cycle
+   * Client and server now filter sent and accepted ciphersuites on minimum
+     and maximum protocol version
+   * Ability to disable server_name extension (RFC 6066)
+   * Renamed error_strerror() to the less conflicting polarssl_strerror()
+     (Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC)
+   * SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly
+   * All RSA operations require a random generator for blinding purposes
+   * X509 core refactored
+   * x509_crt_verify() now case insensitive for cn (RFC 6125 6.4)
+   * Also compiles / runs without time-based functions (!POLARSSL_HAVE_TIME)
+   * Support faulty X509 v1 certificates with extensions
+     (POLARSSL_X509_ALLOW_EXTENSIONS_NON_V3)
+
+Bugfix
+   * Fixed parse error in ssl_parse_certificate_request()
+   * zlib compression/decompression skipped on empty blocks
+   * Support for AIX header locations in net.c module
+   * Fixed file descriptor leaks
+
+Security
+   * RSA blinding on CRT operations to counter timing attacks
+     (found by Cyril Arnaud and Pierre-Alain Fouque)
+
+
+= Version 1.2.14 released 2015-05-??
+
+Security
+   * Fix potential invalid memory read in the server, that allows a client to
+     crash it remotely (found by Caj Larsson).
+   * Fix potential invalid memory read in certificate parsing, that allows a
+     client to crash the server remotely if client authentication is enabled
+     (found using Codenomicon Defensics).
+   * Add countermeasure against "Lucky 13 strikes back" cache-based attack,
+     https://dl.acm.org/citation.cfm?id=2714625
+
+Bugfix
+   * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos).
+   * Fix hardclock() (only used in the benchmarking program) with some
+     versions of mingw64 (found by kxjhlele).
+   * Fix warnings from mingw64 in timing.c (found by kxjklele).
+   * Fix potential unintended sign extension in asn1_get_len() on 64-bit
+     platforms (found with Coverity Scan).
+
+= Version 1.2.13 released 2015-02-16
+Note: Although PolarSSL has been renamed to mbed TLS, no changes reflecting
+      this will be made in the 1.2 branch at this point.
+
+Security
+   * Fix remotely-triggerable uninitialised pointer dereference caused by
+     crafted X.509 certificate (TLS server is not affected if it doesn't ask
+     for a client certificate) (found using Codenomicon Defensics).
+   * Fix remotely-triggerable memory leak caused by crafted X.509 certificates
+     (TLS server is not affected if it doesn't ask for a client certificate)
+     (found using Codenomicon Defensics).
+   * Fix potential stack overflow while parsing crafted X.509 certificates
+     (TLS server is not affected if it doesn't ask for a client certificate)
+     found using Codenomicon Defensics).
+   * Fix buffer overread of size 1 when parsing crafted X.509 certificates
+     (TLS server is not affected if it doesn't ask for a client certificate).
+
+Bugfix
+   * Fix potential undefined behaviour in Camellia.
+   * Fix memory leaks in PKCS#5 and PKCS#12.
+   * Stack buffer overflow if ctr_drbg_update() is called with too large
+     add_len (found by Jean-Philippe Aumasson) (not triggerable remotely).
+   * Fix bug in MPI/bignum on s390/s390x (reported by Dan Horák) (introduced
+     in 1.2.12).
+   * Fix unchecked return code in x509_crt_parse_path() on Windows (found by
+     Peter Vaskovic).
+   * Fix assembly selection for MIPS64 (thanks to James Cowgill).
+   * ssl_get_verify_result() now works even if the handshake was aborted due
+     to a failed verification (found by Fredrik Axelsson).
+   * Skip writing and parsing signature_algorithm extension if none of the
+     key exchanges enabled needs certificates. This fixes a possible interop
+     issue with some servers when a zero-length extension was sent. (Reported
+     by Peter Dettman.)
+   * On a 0-length input, base64_encode() did not correctly set output length
+     (found by Hendrik van den Boogaard).
+
+Changes
+   * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined.
+   * Forbid repeated extensions in X.509 certificates.
+   * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the
+     length of an X.509 verification chain (default = 8).
+= Version 1.2.12 released 2014-10-24
+
+Security
+   * Remotely-triggerable memory leak when parsing some X.509 certificates
+     (server is not affected if it doesn't ask for a client certificate).
+     (Found using Codenomicon Defensics.)
+
+Bugfix
+   * Fix potential bad read in parsing ServerHello (found by Adrien
+     Vialletelle).
+   * ssl_close_notify() could send more than one message in some circumstances
+     with non-blocking I/O.
+   * x509_crt_parse() did not increase total_failed on PEM error
+   * Fix compiler warnings on iOS (found by Sander Niemeijer).
+   * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel).
+   * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce).
+   * ssl_read() could return non-application data records on server while
+     renegotation was pending, and on client when a HelloRequest was received.
+   * Fix warnings from Clang's scan-build (contributed by Alfred Klomp).
+
+Changes
+   * X.509 certificates with more than one AttributeTypeAndValue per
+     RelativeDistinguishedName are not accepted any more.
+   * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than
+     POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
+   * Accept spaces at end of line or end of buffer in base64_decode().
+
+= Version 1.2.11 released 2014-07-11
+Features
+   * Entropy module now supports seed writing and reading
+
+Changes
+   * Introduced POLARSSL_HAVE_READDIR_R for systems without it
+   * Improvements to the CMake build system, contributed by Julian Ospald.
+   * Work around a bug of the version of Clang shipped by Apple with Mavericks
+     that prevented bignum.c from compiling. (Reported by Rafael Baptista.)
+   * Improvements to tests/Makefile, contributed by Oden Eriksson.
+   * Use UTC time to check certificate validity.
+   * Reject certificates with times not in UTC, per RFC 5280.
+   * Migrate zeroizing of data to polarssl_zeroize() instead of memset()
+     against unwanted compiler optimizations
+
+Security
+   * Forbid change of server certificate during renegotiation to prevent
+     "triple handshake" attack when authentication mode is optional (the
+     attack was already impossible when authentication is required).
+   * Check notBefore timestamp of certificates and CRLs from the future.
+   * Forbid sequence number wrapping
+   * Prevent potential NULL pointer dereference in ssl_read_record() (found by
+     TrustInSoft)
+   * Fix length checking for AEAD ciphersuites (found by Codenomicon).
+     It was possible to crash the server (and client) using crafted messages
+     when a GCM suite was chosen.
+
+Bugfix
+   * Fixed X.509 hostname comparison (with non-regular characters)
+   * SSL now gracefully handles missing RNG
+   * crypt_and_hash app checks MAC before final decryption
+   * Fixed x509_crt_parse_path() bug on Windows platforms
+   * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by
+     TrustInSoft)
+   * Fixed potential overflow in certificate size verification in
+     ssl_write_certificate() (found by TrustInSoft)
+   * Fix ASM format in bn_mul.h
+   * Potential memory leak in bignum_selftest()
+   * Replaced expired test certificate
+   * ssl_mail_client now terminates lines with CRLF, instead of LF
+   * Fix bug in RSA PKCS#1 v1.5 "reversed" operations
+   * Fixed testing with out-of-source builds using cmake
+   * Fixed version-major intolerance in server
+   * Fixed CMake symlinking on out-of-source builds
+   * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by
+     Alex Wilson.)
+   * ssl_init() was leaving a dirty pointer in ssl_context if malloc of
+     out_ctr failed
+   * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc
+     of one of them failed
+   * x509_get_current_time() uses localtime_r() to prevent thread issues
+   * Some example server programs were not sending the close_notify alert.
+   * Potential memory leak in mpi_exp_mod() when error occurs during
+     calculation of RR.
+   * Improve interoperability by not writing extension length in ClientHello
+     when no extensions are present (found by Matthew Page)
+   * rsa_check_pubkey() now allows an E up to N
+   * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings
+   * mpi_fill_random() was creating numbers larger than requested on
+     big-endian platform when size was not an integer number of limbs
+   * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer)
+   * Stricter check on SSL ClientHello internal sizes compared to actual packet
+     size (found by TrustInSoft)
+   * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan).
+   * Use \n\t rather than semicolons for bn_mul asm, since some assemblers
+     interpret semicolons as comment delimiters (found by Barry K. Nathan).
+   * Disable broken Sparc64 bn_mul assembly (found by Florian Obser).
+   * Fix base64_decode() to return and check length correctly (in case of
+     tight buffers)
+
+= Version 1.2.10 released 2013-10-07
+Changes
+   * Changed RSA blinding to a slower but thread-safe version
+
+Bugfix
+   * Fixed memory leak in RSA as a result of introduction of blinding
+   * Fixed ssl_pkcs11_decrypt() prototype
+   * Fixed MSVC project files
+
+= Version 1.2.9 released 2013-10-01
+Changes
+   * x509_verify() now case insensitive for cn (RFC 6125 6.4)
+
+Bugfix
+   * Fixed potential memory leak when failing to resume a session
+   * Fixed potential file descriptor leaks (found by Remi Gacogne)
+   * Minor fixes
+
+Security
+   * Fixed potential heap buffer overflow on large hostname setting
+   * Fixed potential negative value misinterpretation in load_file()
+   * RSA blinding on CRT operations to counter timing attacks
+     (found by Cyril Arnaud and Pierre-Alain Fouque)
+
+= Version 1.2.8 released 2013-06-19
+Features
+   * Parsing of PKCS#8 encrypted private key files
+   * PKCS#12 PBE and derivation functions
+   * Centralized module option values in config.h to allow user-defined
+     settings without editing header files by using POLARSSL_CONFIG_OPTIONS
+
+Changes
+   * HAVEGE random generator disabled by default
+   * Internally split up x509parse_key() into a (PEM) handler function
+     and specific DER parser functions for the PKCS#1 and unencrypted
+     PKCS#8 private key formats
+   * Added mechanism to provide alternative implementations for all
+     symmetric cipher and hash algorithms (e.g. POLARSSL_AES_ALT in
+     config.h)
+   * PKCS#5 module added. Moved PBKDF2 functionality inside and deprecated
+     old PBKDF2 module
+
+Bugfix
+   * Secure renegotiation extension should only be sent in case client
+     supports secure renegotiation
+   * Fixed offset for cert_type list in ssl_parse_certificate_request()
+   * Fixed const correctness issues that have no impact on the ABI
+   * x509parse_crt() now better handles PEM error situations
+   * ssl_parse_certificate() now calls x509parse_crt_der() directly
+     instead of the x509parse_crt() wrapper that can also parse PEM
+     certificates
+   * x509parse_crtpath() is now reentrant and uses more portable stat()
+   * Fixed bignum.c and bn_mul.h to support Thumb2 and LLVM compiler
+   * Fixed values for 2-key Triple DES in cipher layer
+   * ssl_write_certificate_request() can handle empty ca_chain
+
+Security
+   * A possible DoS during the SSL Handshake, due to faulty parsing of
+     PEM-encoded certificates has been fixed (found by Jack Lloyd)
+
+= Version 1.2.7 released 2013-04-13
+Features
+   * Ability to specify allowed ciphersuites based on the protocol version.
+
+Changes
+   * Default Blowfish keysize is now 128-bits
+   * Test suites made smaller to accommodate Raspberry Pi
+
+Bugfix
+   * Fix for MPI assembly for ARM
+   * GCM adapted to support sizes > 2^29
+
+= Version 1.2.6 released 2013-03-11
+Bugfix
+   * Fixed memory leak in ssl_free() and ssl_reset() for active session
+   * Corrected GCM counter incrementation to use only 32-bits instead of
+     128-bits (found by Yawning Angel)
+   * Fixes for 64-bit compilation with MS Visual Studio
+   * Fixed net_bind() for specified IP addresses on little endian systems
+   * Fixed assembly code for ARM (Thumb and regular) for some compilers
+
+Changes
+   * Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(),
+     rsa_pkcs1_sign() and rsa_pkcs1_verify() to separate PKCS#1 v1.5 and
+     PKCS#1 v2.1 functions
+   * Added support for custom labels when using rsa_rsaes_oaep_encrypt()
+     or rsa_rsaes_oaep_decrypt()
+   * Re-added handling for SSLv2 Client Hello when the define
+     POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is set
+   * The SSL session cache module (ssl_cache) now also retains peer_cert
+     information (not the entire chain)
+
+Security
+   * Removed further timing differences during SSL message decryption in
+     ssl_decrypt_buf()
+   * Removed timing differences due to bad padding from
+     rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
+     operations
+
+= Version 1.2.5 released 2013-02-02
+Changes
+   * Allow enabling of dummy error_strerror() to support some use-cases
+   * Debug messages about padding errors during SSL message decryption are
+     disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL
+   * Sending of security-relevant alert messages that do not break
+     interoperability can be switched on/off with the flag
+     POLARSSL_SSL_ALL_ALERT_MESSAGES
+
+Security
+   * Removed timing differences during SSL message decryption in
+     ssl_decrypt_buf() due to badly formatted padding
+
+= Version 1.2.4 released 2013-01-25
+Changes
+   * More advanced SSL ciphersuite representation and moved to more dynamic
+     SSL core
+   * Added ssl_handshake_step() to allow single stepping the handshake process
+
+Bugfix
+   * Memory leak when using RSA_PKCS_V21 operations fixed
+   * Handle future version properly in ssl_write_certificate_request()
+   * Correctly handle CertificateRequest message in client for <= TLS 1.1
+     without DN list
+
+= Version 1.2.3 released 2012-11-26
+Bugfix
+   * Server not always sending correct CertificateRequest message
+
+= Version 1.2.2 released 2012-11-24
+Changes
+   * Added p_hw_data to ssl_context for context specific hardware acceleration
+     data
+   * During verify trust-CA is only checked for expiration and CRL presence
+
+Bugfixes
+   * Fixed client authentication compatibility
+   * Fixed dependency on POLARSSL_SHA4_C in SSL modules
+
+= Version 1.2.1 released 2012-11-20
+Changes
+   * Depth that the certificate verify callback receives is now numbered
+     bottom-up (Peer cert depth is 0)
+
+Bugfixes
+   * Fixes for MSVC6
+   * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
+   * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
+     Pégourié-Gonnard)
+   * Fixed possible segfault in mpi_shift_r() (found by Manuel
+     Pégourié-Gonnard)
+   * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
+
+= Version 1.2.0 released 2012-10-31
+Features
+   * Added support for NULL cipher (POLARSSL_CIPHER_NULL_CIPHER) and weak
+     ciphersuites (POLARSSL_ENABLE_WEAK_CIPHERSUITES). They are disabled by
+     default!
+   * Added support for wildcard certificates
+   * Added support for multi-domain certificates through the X509 Subject
+     Alternative Name extension
+   * Added preliminary ASN.1 buffer writing support
+   * Added preliminary X509 Certificate Request writing support
+   * Added key_app_writer example application
+   * Added cert_req example application
+   * Added base Galois Counter Mode (GCM) for AES
+   * Added TLS 1.2 support (RFC 5246)
+   * Added GCM suites to TLS 1.2 (RFC 5288)
+   * Added commandline error code convertor (util/strerror)
+   * Added support for Hardware Acceleration hooking in SSL/TLS
+   * Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and
+     example application (programs/ssl/o_p_test) (requires OpenSSL)
+   * Added X509 CA Path support
+   * Added Thumb assembly optimizations
+   * Added DEFLATE compression support as per RFC3749 (requires zlib)
+   * Added blowfish algorithm (Generic and cipher layer)
+   * Added PKCS#5 PBKDF2 key derivation function
+   * Added Secure Renegotiation (RFC 5746)
+   * Added predefined DHM groups from RFC 5114
+   * Added simple SSL session cache implementation
+   * Added ServerName extension parsing (SNI) at server side
+   * Added option to add minimum accepted SSL/TLS protocol version
+
+Changes
+   * Removed redundant POLARSSL_DEBUG_MSG define
+   * AES code only check for Padlock once
+   * Fixed const-correctness mpi_get_bit()
+   * Documentation for mpi_lsb() and mpi_msb()
+   * Moved out_msg to out_hdr + 32 to support hardware acceleration
+   * Changed certificate verify behaviour to comply with RFC 6125 section 6.3
+     to not match CN if subjectAltName extension is present (Closes ticket #56)
+   * Cipher layer cipher_mode_t POLARSSL_MODE_CFB128 is renamed to
+     POLARSSL_MODE_CFB, to also handle different block size CFB modes.
+   * Removed handling for SSLv2 Client Hello (as per RFC 5246 recommendation)
+   * Revamped session resumption handling
+   * Generalized external private key implementation handling (like PKCS#11)
+     in SSL/TLS
+   * Revamped x509_verify() and the SSL f_vrfy callback implementations
+   * Moved from unsigned long to fixed width uint32_t types throughout code
+   * Renamed ciphersuites naming scheme to IANA reserved names
+
+Bugfix
+   * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
+     Hui Dong)
+   * Fixed potential heap corruption in x509_name allocation
+   * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
+   * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
+     #52)
+   * Handle encryption with private key and decryption with public key as per
+     RFC 2313
+   * Handle empty certificate subject names
+   * Prevent reading over buffer boundaries on X509 certificate parsing
+   * mpi_add_abs() now correctly handles adding short numbers to long numbers
+     with carry rollover (found by Ruslan Yushchenko)
+   * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
+   * Fixed MPI assembly for SPARC64 platform
+
+Security
+   * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
+     Vanderbeken)
+
+= Version 1.1.8 released on 2013-10-01
+Bugfix
+   * Fixed potential memory leak when failing to resume a session
+   * Fixed potential file descriptor leaks
+
+Security
+   * Potential buffer-overflow for ssl_read_record() (independently found by
+     both TrustInSoft and Paul Brodeur of Leviathan Security Group)
+   * Potential negative value misinterpretation in load_file()
+   * Potential heap buffer overflow on large hostname setting
+
+= Version 1.1.7 released on 2013-06-19
+Changes
+   * HAVEGE random generator disabled by default
+
+Bugfix
+   * x509parse_crt() now better handles PEM error situations
+   * ssl_parse_certificate() now calls x509parse_crt_der() directly
+     instead of the x509parse_crt() wrapper that can also parse PEM
+     certificates
+   * Fixed values for 2-key Triple DES in cipher layer
+   * ssl_write_certificate_request() can handle empty ca_chain
+
+Security
+   * A possible DoS during the SSL Handshake, due to faulty parsing of
+     PEM-encoded certificates has been fixed (found by Jack Lloyd)
+
+= Version 1.1.6 released on 2013-03-11
+Bugfix
+   * Fixed net_bind() for specified IP addresses on little endian systems
+
+Changes
+   * Allow enabling of dummy error_strerror() to support some use-cases
+   * Debug messages about padding errors during SSL message decryption are
+     disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL
+
+Security
+   * Removed timing differences during SSL message decryption in
+     ssl_decrypt_buf()
+   * Removed timing differences due to bad padding from
+     rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
+     operations
+
+= Version 1.1.5 released on 2013-01-16
+Bugfix
+   * Fixed MPI assembly for SPARC64 platform
+   * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
+   * mpi_add_abs() now correctly handles adding short numbers to long numbers
+     with carry rollover
+   * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
+   * Prevent reading over buffer boundaries on X509 certificate parsing
+   * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
+     #52)
+   * Fixed possible segfault in mpi_shift_r() (found by Manuel
+     Pégourié-Gonnard)
+   * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
+     Pégourié-Gonnard)
+   * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
+   * Memory leak when using RSA_PKCS_V21 operations fixed
+   * Handle encryption with private key and decryption with public key as per
+     RFC 2313
+   * Fixes for MSVC6
+
+Security
+   * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
+     Vanderbeken)
+
+= Version 1.1.4 released on 2012-05-31
+Bugfix
+   * Correctly handle empty SSL/TLS packets (Found by James Yonan)
+   * Fixed potential heap corruption in x509_name allocation
+   * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
+
+= Version 1.1.3 released on 2012-04-29
+Bugfix
+   * Fixed random MPI generation to not generate more size than requested.
+
+= Version 1.1.2 released on 2012-04-26
+Bugfix
+   * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
+     Hui Dong)
+
+Security
+   * Fixed potential memory corruption on miscrafted client messages (found by
+     Frama-C team at CEA LIST)
+   * Fixed generation of DHM parameters to correct length (found by Ruslan
+     Yushchenko)
+
+= Version 1.1.1 released on 2012-01-23
+Bugfix
+   * Check for failed malloc() in ssl_set_hostname() and x509_get_entries()
+     (Closes ticket #47, found by Hugo Leisink)
+   * Fixed issues with Intel compiler on 64-bit systems (Closes ticket #50)
+   * Fixed multiple compiler warnings for VS6 and armcc
+   * Fixed bug in CTR_CRBG selftest
+
+= Version 1.1.0 released on 2011-12-22
+Features
+   * Added ssl_session_reset() to allow better multi-connection pools of
+     SSL contexts without needing to set all non-connection-specific
+     data and pointers again. Adapted ssl_server to use this functionality.
+   * Added ssl_set_max_version() to allow clients to offer a lower maximum
+     supported version to a server to help buggy server implementations.
+     (Closes ticket #36)
+   * Added cipher_get_cipher_mode() and cipher_get_cipher_operation()
+     introspection functions (Closes ticket #40)
+   * Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator
+   * Added a generic entropy accumulator that provides support for adding
+     custom entropy sources and added some generic and platform dependent
+     entropy sources
+
+Changes
+   * Documentation for AES and Camellia in modes CTR and CFB128 clarified.
+   * Fixed rsa_encrypt and rsa_decrypt examples to use public key for
+     encryption and private key for decryption. (Closes ticket #34)
+   * Inceased maximum size of ASN1 length reads to 32-bits.
+   * Added an EXPLICIT tag number parameter to x509_get_ext()
+   * Added a separate CRL entry extension parsing function
+   * Separated the ASN.1 parsing code from the X.509 specific parsing code.
+     So now there is a module that is controlled with POLARSSL_ASN1_PARSE_C.
+   * Changed the defined key-length of DES ciphers in cipher.h to include the
+     parity bits, to prevent mistakes in copying data. (Closes ticket #33)
+   * Loads of minimal changes to better support WINCE as a build target
+     (Credits go to Marco Lizza)
+   * Added POLARSSL_MPI_WINDOW_SIZE definition to allow easier time to memory
+     trade-off
+   * Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size
+     management (Closes ticket #44)
+   * Changed the used random function pointer to more flexible format. Renamed
+     havege_rand() to havege_random() to prevent mistakes. Lots of changes as
+     a consequence in library code and programs
+   * Moved all examples programs to use the new entropy and CTR_DRBG
+   * Added permissive certificate parsing to x509parse_crt() and
+     x509parse_crtfile(). With permissive parsing the parsing does not stop on
+     encountering a parse-error. Beware that the meaning of return values has
+     changed!
+   * All error codes are now negative. Even on mermory failures and IO errors.
+
+Bugfix
+   * Fixed faulty HMAC-MD2 implementation. Found by dibac. (Closes
+     ticket #37)
+   * Fixed a bug where the CRL parser expected an EXPLICIT ASN.1 tag
+     before version numbers
+   * Allowed X509 key usage parsing to accept 4 byte values instead of the
+     standard 1 byte version sometimes used by Microsoft. (Closes ticket #38)
+   * Fixed incorrect behaviour in case of RSASSA-PSS with a salt length
+     smaller than the hash length. (Closes ticket #41)
+   * If certificate serial is longer than 32 octets, serial number is now
+     appended with '....' after first 28 octets
+   * Improved build support for s390x and sparc64 in bignum.h
+   * Fixed MS Visual C++ name clash with int64 in sha4.h
+   * Corrected removal of leading "00:" in printing serial numbers in
+     certificates and CRLs
+
+= Version 1.0.0 released on 2011-07-27
+Features
+   * Expanded cipher layer with support for CFB128 and CTR mode
+   * Added rsa_encrypt and rsa_decrypt simple example programs.
+
+Changes
+   * The generic cipher and message digest layer now have normal error
+     codes instead of integers
+
+Bugfix
+   * Undid faulty bug fix in ssl_write() when flushing old data (Ticket
+     #18)
+
+= Version 0.99-pre5 released on 2011-05-26
+Features
+   * Added additional Cipher Block Modes to symmetric ciphers
+     (AES CTR, Camellia CTR, XTEA CBC) including the option to
+     enable and disable individual modes when needed
+   * Functions requiring File System functions can now be disabled
+     by undefining POLARSSL_FS_IO
+   * A error_strerror function() has been added to translate between
+     error codes and their description.
+   * Added mpi_get_bit() and mpi_set_bit() individual bit setter/getter
+     functions.
+   * Added ssl_mail_client and ssl_fork_server as example programs.
+
+Changes
+   * Major argument / variable rewrite. Introduced use of size_t
+     instead of int for buffer lengths and loop variables for
+     better unsigned / signed use. Renamed internal bigint types
+     t_int and t_dbl to t_uint and t_udbl in the process
+   * mpi_init() and mpi_free() now only accept a single MPI
+     argument and do not accept variable argument lists anymore.
+   * The error codes have been remapped and combining error codes
+     is now done with a PLUS instead of an OR as error codes
+     used are negative.
+   * Changed behaviour of net_read(), ssl_fetch_input() and ssl_recv().
+     net_recv() now returns 0 on EOF instead of
+     POLARSSL_ERR_NET_CONN_RESET. ssl_fetch_input() returns
+     POLARSSL_ERR_SSL_CONN_EOF on an EOF from its f_recv() function.
+     ssl_read() returns 0 if a POLARSSL_ERR_SSL_CONN_EOF is received
+     after the handshake.
+   * Network functions now return POLARSSL_ERR_NET_WANT_READ or
+     POLARSSL_ERR_NET_WANT_WRITE instead of the ambiguous
+     POLARSSL_ERR_NET_TRY_AGAIN
+
+= Version 0.99-pre4 released on 2011-04-01
+Features
+   * Added support for PKCS#1 v2.1 encoding and thus support
+     for the RSAES-OAEP and RSASSA-PSS operations.
+   * Reading of Public Key files incorporated into default x509
+     functionality as well.
+   * Added mpi_fill_random() for centralized filling of big numbers
+     with random data (Fixed ticket #10)
+
+Changes
+   * Debug print of MPI now removes leading zero octets and
+     displays actual bit size of the value.
+   * x509parse_key() (and as a consequence x509parse_keyfile())
+     does not zeroize memory in advance anymore. Use rsa_init()
+     before parsing a key or keyfile!
+
+Bugfix
+   * Debug output of MPI's now the same independent of underlying
+     platform (32-bit / 64-bit) (Fixes ticket #19, found by Mads
+     Kiilerich and Mihai Militaru)
+   * Fixed bug in ssl_write() when flushing old data (Fixed ticket
+     #18, found by Nikolay Epifanov)
+   * Fixed proper handling of RSASSA-PSS verification with variable
+     length salt lengths
+
+= Version 0.99-pre3 released on 2011-02-28
+This release replaces version 0.99-pre2 which had possible copyright issues.
+Features
+   * Parsing PEM private keys encrypted with DES and AES
+     are now supported as well (Fixes ticket #5)
+   * Added crl_app program to allow easy reading and
+     printing of X509 CRLs from file
+
+Changes
+   * Parsing of PEM files moved to separate module (Fixes
+     ticket #13). Also possible to remove PEM support for
+     systems only using DER encoding
+
+Bugfixes
+   * Corrected parsing of UTCTime dates before 1990 and
+     after 1950
+   * Support more exotic OID's when parsing certificates
+     (found by Mads Kiilerich)
+   * Support more exotic name representations when parsing
+     certificates (found by Mads Kiilerich)
+   * Replaced the expired test certificates
+   * Do not bail out if no client certificate specified. Try
+     to negotiate anonymous connection (Fixes ticket #12,
+     found by Boris Krasnovskiy)
+
+Security fixes
+   * Fixed a possible Man-in-the-Middle attack on the
+     Diffie Hellman key exchange (thanks to Larry Highsmith,
+     Subreption LLC)
+
+= Version 0.99-pre1 released on 2011-01-30
+Features
+Note: Most of these features have been donated by Fox-IT
+   * Added Doxygen source code documentation parts
+   * Added reading of DHM context from memory and file
+   * Improved X509 certificate parsing to include extended
+     certificate fields, including Key Usage
+   * Improved certificate verification and verification
+     against the available CRLs
+   * Detection for DES weak keys and parity bits added
+   * Improvements to support integration in other
+     applications:
+       + Added generic message digest and cipher wrapper
+       + Improved information about current capabilities,
+         status, objects and configuration
+       + Added verification callback on certificate chain
+         verification to allow external blacklisting
+       + Additional example programs to show usage
+   * Added support for PKCS#11 through the use of the
+     libpkcs11-helper library
+
+Changes
+   * x509parse_time_expired() checks time in addition to
+     the existing date check
+   * The ciphers member of ssl_context and the cipher member
+     of ssl_session have been renamed to ciphersuites and
+     ciphersuite respectively. This clarifies the difference
+     with the generic cipher layer and is better naming
+     altogether
+
+= Version 0.14.0 released on 2010-08-16
+Features
+   * Added support for SSL_EDH_RSA_AES_128_SHA and
+     SSL_EDH_RSA_CAMELLIA_128_SHA ciphersuites
+   * Added compile-time and run-time version information
+   * Expanded ssl_client2 arguments for more flexibility
+   * Added support for TLS v1.1
+
+Changes
+   * Made Makefile cleaner
+   * Removed dependency on rand() in rsa_pkcs1_encrypt().
+     Now using random fuction provided to function and
+     changed the prototype of rsa_pkcs1_encrypt(),
+     rsa_init() and rsa_gen_key().
+   * Some SSL defines were renamed in order to avoid
+     future confusion
+
+Bug fixes
+   * Fixed CMake out of source build for tests (found by
+     kkert)
+   * rsa_check_private() now supports PKCS1v2 keys as well
+   * Fixed deadlock in rsa_pkcs1_encrypt() on failing random
+     generator
+
+= Version 0.13.1 released on 2010-03-24
+Bug fixes
+   * Fixed Makefile in library that was mistakenly merged
+   * Added missing const string fixes
+
+= Version 0.13.0 released on 2010-03-21
+Features
+   * Added option parsing for host and port selection to
+     ssl_client2
+   * Added support for GeneralizedTime in X509 parsing
+   * Added cert_app program to allow easy reading and
+     printing of X509 certificates from file or SSL
+     connection.
+
+Changes
+   * Added const correctness for main code base
+   * X509 signature algorithm determination is now
+     in a function to allow easy future expansion
+   * Changed symmetric cipher functions to
+     identical interface (returning int result values)
+   * Changed ARC4 to use separate input/output buffer
+   * Added reset function for HMAC context as speed-up
+     for specific use-cases
+
+Bug fixes
+   * Fixed bug resulting in failure to send the last
+     certificate in the chain in ssl_write_certificate() and
+     ssl_write_certificate_request() (found by fatbob)
+   * Added small fixes for compiler warnings on a Mac
+     (found by Frank de Brabander)
+   * Fixed algorithmic bug in mpi_is_prime() (found by
+     Smbat Tonoyan)
+
+= Version 0.12.1 released on 2009-10-04
+Changes
+   * Coverage test definitions now support 'depends_on'
+     tagging system.
+   * Tests requiring specific hashing algorithms now honor
+     the defines.
+
+Bug fixes
+   * Changed typo in #ifdef in x509parse.c (found
+     by Eduardo)
+
+= Version 0.12.0 released on 2009-07-28
+Features
+   * Added CMake makefiles as alternative to regular Makefiles.
+   * Added preliminary Code Coverage tests for AES, ARC4,
+     Base64, MPI, SHA-family, MD-family, HMAC-SHA-family,
+     Camellia, DES, 3-DES, RSA PKCS#1, XTEA, Diffie-Hellman
+     and X509parse.
+
+Changes
+   * Error codes are not (necessarily) negative. Keep
+     this is mind when checking for errors.
+   * RSA_RAW renamed to SIG_RSA_RAW for consistency.
+   * Fixed typo in name of POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE.
+   * Changed interface for AES and Camellia setkey functions
+     to indicate invalid key lengths.
+
+Bug fixes
+   * Fixed include location of endian.h on FreeBSD (found by
+     Gabriel)
+   * Fixed include location of endian.h and name clash on
+     Apples (found by Martin van Hensbergen)
+   * Fixed HMAC-MD2 by modifying md2_starts(), so that the
+     required HMAC ipad and opad variables are not cleared.
+     (found by code coverage tests)
+   * Prevented use of long long in bignum if
+     POLARSSL_HAVE_LONGLONG not defined (found by Giles
+     Bathgate).
+   * Fixed incorrect handling of negative strings in
+     mpi_read_string() (found by code coverage tests).
+   * Fixed segfault on handling empty rsa_context in
+     rsa_check_pubkey() and rsa_check_privkey() (found by
+     code coverage tests).
+   * Fixed incorrect handling of one single negative input
+     value in mpi_add_abs() (found by code coverage tests).
+   * Fixed incorrect handling of negative first input
+     value in mpi_sub_abs() (found by code coverage tests).
+   * Fixed incorrect handling of negative first input
+     value in mpi_mod_mpi() and mpi_mod_int(). Resulting
+     change also affects mpi_write_string() (found by code
+     coverage tests).
+   * Corrected is_prime() results for 0, 1 and 2 (found by
+     code coverage tests).
+   * Fixed Camellia and XTEA for 64-bit Windows systems.
+
+= Version 0.11.1 released on 2009-05-17
+   * Fixed missing functionality for SHA-224, SHA-256, SHA384,
+     SHA-512 in rsa_pkcs1_sign()
+
+= Version 0.11.0 released on 2009-05-03
+   * Fixed a bug in mpi_gcd() so that it also works when both
+     input numbers are even and added testcases to check
+     (found by Pierre Habouzit).
+   * Added support for SHA-224, SHA-256, SHA-384 and SHA-512
+     one way hash functions with the PKCS#1 v1.5 signing and
+     verification.
+   * Fixed minor bug regarding mpi_gcd located within the
+     POLARSSL_GENPRIME block.
+   * Fixed minor memory leak in x509parse_crt() and added better
+     handling of 'full' certificate chains (found by Mathias
+     Olsson).
+   * Centralized file opening and reading for x509 files into
+     load_file()
+   * Made definition of net_htons() endian-clean for big endian
+     systems (Found by Gernot).
+   * Undefining POLARSSL_HAVE_ASM now also handles prevents asm in
+     padlock and timing code.
+   * Fixed an off-by-one buffer allocation in ssl_set_hostname()
+     responsible for crashes and unwanted behaviour.
+   * Added support for Certificate Revocation List (CRL) parsing.
+   * Added support for CRL revocation to x509parse_verify() and
+     SSL/TLS code.
+   * Fixed compatibility of XTEA and Camellia on a 64-bit system
+     (found by Felix von Leitner).
+
+= Version 0.10.0 released on 2009-01-12
+   * Migrated XySSL to PolarSSL
+   * Added XTEA symmetric cipher
+   * Added Camellia symmetric cipher
+   * Added support for ciphersuites: SSL_RSA_CAMELLIA_128_SHA,
+     SSL_RSA_CAMELLIA_256_SHA and SSL_EDH_RSA_CAMELLIA_256_SHA
+   * Fixed dangerous bug that can cause a heap overflow in
+     rsa_pkcs1_decrypt (found by Christophe Devine)
+
+================================================================
+XySSL ChangeLog
+
+= Version 0.9 released on 2008-03-16
+
+    * Added support for ciphersuite: SSL_RSA_AES_128_SHA
+    * Enabled support for large files by default in aescrypt2.c
+    * Preliminary openssl wrapper contributed by David Barrett
+    * Fixed a bug in ssl_write() that caused the same payload to
+      be sent twice in non-blocking mode when send returns EAGAIN
+    * Fixed ssl_parse_client_hello(): session id and challenge must
+      not be swapped in the SSLv2 ClientHello (found by Greg Robson)
+    * Added user-defined callback debug function (Krystian Kolodziej)
+    * Before freeing a certificate, properly zero out all cert. data
+    * Fixed the "mode" parameter so that encryption/decryption are
+      not swapped on PadLock; also fixed compilation on older versions
+      of gcc (bug reported by David Barrett)
+    * Correctly handle the case in padlock_xcryptcbc() when input or
+      output data is non-aligned by falling back to the software
+      implementation, as VIA Nehemiah cannot handle non-aligned buffers
+    * Fixed a memory leak in x509parse_crt() which was reported by Greg
+      Robson-Garth; some x509write.c fixes by Pascal Vizeli, thanks to
+      Matthew Page who reported several bugs
+    * Fixed x509_get_ext() to accept some rare certificates which have
+      an INTEGER instead of a BOOLEAN for BasicConstraints::cA.
+    * Added support on the client side for the TLS "hostname" extension
+      (patch contributed by David Patino)
+    * Make x509parse_verify() return BADCERT_CN_MISMATCH when an empty
+      string is passed as the CN (bug reported by spoofy)
+    * Added an option to enable/disable the BN assembly code
+    * Updated rsa_check_privkey() to verify that (D*E) = 1 % (P-1)*(Q-1)
+    * Disabled obsolete hash functions by default (MD2, MD4); updated
+      selftest and benchmark to not test ciphers that have been disabled
+    * Updated x509parse_cert_info() to correctly display byte 0 of the
+      serial number, setup correct server port in the ssl client example
+    * Fixed a critical denial-of-service with X.509 cert. verification:
+      peer may cause xyssl to loop indefinitely by sending a certificate
+      for which the RSA signature check fails (bug reported by Benoit)
+    * Added test vectors for: AES-CBC, AES-CFB, DES-CBC and 3DES-CBC,
+      HMAC-MD5, HMAC-SHA1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512
+    * Fixed HMAC-SHA-384 and HMAC-SHA-512 (thanks to Josh Sinykin)
+    * Modified ssl_parse_client_key_exchange() to protect against
+      Daniel Bleichenbacher attack on PKCS#1 v1.5 padding, as well
+      as the Klima-Pokorny-Rosa extension of Bleichenbacher's attack
+    * Updated rsa_gen_key() so that ctx->N is always nbits in size
+    * Fixed assembly PPC compilation errors on Mac OS X, thanks to
+      David Barrett and Dusan Semen
+
+= Version 0.8 released on 2007-10-20
+
+    * Modified the HMAC functions to handle keys larger
+      than 64 bytes, thanks to Stephane Desneux and gary ng
+    * Fixed ssl_read_record() to properly update the handshake
+      message digests, which fixes IE6/IE7 client authentication
+    * Cleaned up the XYSSL* #defines, suggested by Azriel Fasten
+    * Fixed net_recv(), thanks to Lorenz Schori and Egon Kocjan
+    * Added user-defined callbacks for handling I/O and sessions
+    * Added lots of debugging output in the SSL/TLS functions
+    * Added preliminary X.509 cert. writing by Pascal Vizeli
+    * Added preliminary support for the VIA PadLock routines
+    * Added AES-CFB mode of operation, contributed by chmike
+    * Added an SSL/TLS stress testing program (ssl_test.c)
+    * Updated the RSA PKCS#1 code to allow choosing between
+      RSA_PUBLIC and RSA_PRIVATE, as suggested by David Barrett
+    * Updated ssl_read() to skip 0-length records from OpenSSL
+    * Fixed the make install target to comply with *BSD make
+    * Fixed a bug in mpi_read_binary() on 64-bit platforms
+    * mpi_is_prime() speedups, thanks to Kevin McLaughlin
+    * Fixed a long standing memory leak in mpi_is_prime()
+    * Replaced realloc with malloc in mpi_grow(), and set
+      the sign of zero as positive in mpi_init() (reported
+      by Jonathan M. McCune)
+
+= Version 0.7 released on 2007-07-07
+
+    * Added support for the MicroBlaze soft-core processor
+    * Fixed a bug in ssl_tls.c which sometimes prevented SSL
+      connections from being established with non-blocking I/O
+    * Fixed a couple bugs in the VS6 and UNIX Makefiles
+    * Fixed the "PIC register ebx clobbered in asm" bug
+    * Added HMAC starts/update/finish support functions
+    * Added the SHA-224, SHA-384 and SHA-512 hash functions
+    * Fixed the net_set_*block routines, thanks to Andreas
+    * Added a few demonstration programs: md5sum, sha1sum,
+      dh_client, dh_server, rsa_genkey, rsa_sign, rsa_verify
+    * Added new bignum import and export helper functions
+    * Rewrote README.txt in program/ssl/ca to better explain
+      how to create a test PKI
+
+= Version 0.6 released on 2007-04-01
+
+    * Ciphers used in SSL/TLS can now be disabled at compile
+      time, to reduce the memory footprint on embedded systems
+    * Added multiply assembly code for the TriCore and modified
+      havege_struct for this processor, thanks to David Patiño
+    * Added multiply assembly code for 64-bit PowerPCs,
+      thanks to Peking University and the OSU Open Source Lab
+    * Added experimental support of Quantum Cryptography
+    * Added support for autoconf, contributed by Arnaud Cornet
+    * Fixed "long long" compilation issues on IA-64 and PPC64
+    * Fixed a bug introduced in xyssl-0.5/timing.c: hardclock
+      was not being correctly defined on ARM and MIPS
+
+= Version 0.5 released on 2007-03-01
+
+    * Added multiply assembly code for SPARC and Alpha
+    * Added (beta) support for non-blocking I/O operations
+    * Implemented session resuming and client authentication
+    * Fixed some portability issues on WinCE, MINIX 3, Plan9
+      (thanks to Benjamin Newman), HP-UX, FreeBSD and Solaris
+    * Improved the performance of the EDH key exchange
+    * Fixed a bug that caused valid packets with a payload
+      size of 16384 bytes to be rejected
+
+= Version 0.4 released on 2007-02-01
+
+    * Added support for Ephemeral Diffie-Hellman key exchange
+    * Added multiply asm code for SSE2, ARM, PPC, MIPS and M68K
+    * Various improvement to the modular exponentiation code
+    * Rewrote the headers to generate the API docs with doxygen
+    * Fixed a bug in ssl_encrypt_buf (incorrect padding was
+      generated) and in ssl_parse_client_hello (max. client
+      version was not properly set), thanks to Didier Rebeix
+    * Fixed another bug in ssl_parse_client_hello: clients with
+      cipherlists larger than 96 bytes were incorrectly rejected
+    * Fixed a couple memory leak in x509_read.c
+
+= Version 0.3 released on 2007-01-01
+
+    * Added server-side SSLv3 and TLSv1.0 support
+    * Multiple fixes to enhance the compatibility with g++,
+      thanks to Xosé Antón Otero Ferreira
+    * Fixed a bug in the CBC code, thanks to dowst; also,
+      the bignum code is no longer dependent on long long
+    * Updated rsa_pkcs1_sign to handle arbitrary large inputs
+    * Updated timing.c for improved compatibility with i386
+      and 486 processors, thanks to Arnaud Cornet
+
+= Version 0.2 released on 2006-12-01
+
+    * Updated timing.c to support ARM and MIPS arch
+    * Updated the MPI code to support 8086 on MSVC 1.5
+    * Added the copyright notice at the top of havege.h
+    * Fixed a bug in sha2_hmac, thanks to newsoft/Wenfang Zhang
+    * Fixed a bug reported by Adrian Rüegsegger in x509_read_key
+    * Fixed a bug reported by Torsten Lauter in ssl_read_record
+    * Fixed a bug in rsa_check_privkey that would wrongly cause
+      valid RSA keys to be dismissed (thanks to oldwolf)
+    * Fixed a bug in mpi_is_prime that caused some primes to fail
+      the Miller-Rabin primality test
+
+    I'd also like to thank Younès Hafri for the CRUX linux port,
+    Khalil Petit who added XySSL into pkgsrc and Arnaud Cornet
+    who maintains the Debian package :-)
+
+= Version 0.1 released on 2006-11-01

mbedtls.mod/mbedtls/ChangeLog.d/00README.md

@@ -0,0 +1,88 @@
+# Pending changelog entry directory
+
+This directory contains changelog entries that have not yet been merged
+to the changelog file ([`../ChangeLog`](../ChangeLog)).
+
+## What requires a changelog entry?
+
+Write a changelog entry if there is a user-visible change. This includes:
+
+* Bug fixes in the library or in sample programs: fixing a security hole,
+  fixing broken behavior, fixing the build in some configuration or on some
+  platform, etc.
+* New features in the library, new sample programs, or new platform support.
+* Changes in existing behavior. These should be rare. Changes in features
+  that are documented as experimental may or may not be announced, depending
+  on the extent of the change and how widely we expect the feature to be used.
+
+We generally don't include changelog entries for:
+
+* Documentation improvements.
+* Performance improvements, unless they are particularly significant.
+* Changes to parts of the code base that users don't interact with directly,
+  such as test code and test data.
+
+Until Mbed TLS 2.24.0, we required changelog entries in more cases.
+Looking at older changelog entries is good practice for how to write a
+changelog entry, but not for deciding whether to write one.
+
+## Changelog entry file format
+
+A changelog entry file must have the extension `*.txt` and must have the
+following format:
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Security
+   * Change description.
+   * Another change description.
+
+Features
+   * Yet another change description. This is a long change description that
+     spans multiple lines.
+   * Yet again another change description.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The permitted changelog entry categories are as follows:
+<!-- Keep this synchronized with STANDARD_CATEGORIES in assemble_changelog.py! -->
+
+    API changes
+    Default behavior changes
+    Requirement changes
+    New deprecations
+    Removals
+    Features
+    Security
+    Bugfix
+    Changes
+
+Use “Changes” for anything that doesn't fit in the other categories.
+
+## How to write a changelog entry
+
+Each entry starts with three spaces, an asterisk and a space. Continuation
+lines start with 5 spaces. Lines wrap at 79 characters.
+
+Write full English sentences with proper capitalization and punctuation. Use
+the present tense. Use the imperative where applicable. For example: “Fix a
+bug in mbedtls_xxx() ….”
+
+Include GitHub issue numbers where relevant. Use the format “#1234” for an
+Mbed TLS issue. Add other external references such as CVE numbers where
+applicable.
+
+Credit bug reporters where applicable.
+
+**Explain why, not how**. Remember that the audience is the users of the
+library, not its developers. In particular, for a bug fix, explain the
+consequences of the bug, not how the bug was fixed. For a new feature, explain
+why one might be interested in the feature. For an API change or a deprecation,
+explain how to update existing applications.
+
+See [existing entries](../ChangeLog) for examples.
+
+## How `ChangeLog` is updated
+
+Run [`../scripts/assemble_changelog.py`](../scripts/assemble_changelog.py)
+from a Git working copy
+to move the entries from files in `ChangeLog.d` to the main `ChangeLog` file.

mbedtls.mod/mbedtls/ChangeLog.d/add_psa_m_aead.txt

@@ -0,0 +1,3 @@
+Features
+   * Implement the PSA multipart AEAD interface, currently supporting
+     ChaChaPoly and GCM.

mbedtls.mod/mbedtls/ChangeLog.d/base64-ranges.txt

@@ -0,0 +1,4 @@
+Changes
+   * Improve the performance of base64 constant-flow code. The result is still
+     slower than the original non-constant-flow implementation, but much faster
+     than the previous constant-flow implementation. Fixes #4814.

mbedtls.mod/mbedtls/ChangeLog.d/bugfix-for-gcm-long-iv-size.txt

@@ -0,0 +1,4 @@
+Bugfix
+   * Fix a bug in mbedtls_gcm_starts() when bits of iv are longer than 2^32.
+   * Fix #4884.
+

mbedtls.mod/mbedtls/ChangeLog.d/ccm_star_no_tag.txt

@@ -0,0 +1,10 @@
+Changes
+   * Ignore plaintext/ciphertext lengths for CCM*-no-tag operations.
+     For CCM* encryption/decryption without authentication, input
+     length will be ignored.
+
+Features
+   * Add support for CCM*-no-tag cipher to the PSA.
+     Currently only 13-byte long IV's are supported.
+     For decryption a minimum of 16-byte long input is expected.
+     These restrictions may be subject to change.

mbedtls.mod/mbedtls/ChangeLog.d/chacha20-poly1305-invalid-nonce.txt

@@ -0,0 +1,3 @@
+Changes
+   * Indicate in the error returned if the nonce length used with
+     ChaCha20-Poly1305 is invalid, and not just unsupported.

mbedtls.mod/mbedtls/ChangeLog.d/check-return.txt

@@ -0,0 +1,17 @@
+Bugfix
+   * Failures of alternative implementations of AES or DES single-block
+     functions enabled with MBEDTLS_AES_ENCRYPT_ALT, MBEDTLS_AES_DECRYPT_ALT,
+     MBEDTLS_DES_CRYPT_ECB_ALT or MBEDTLS_DES3_CRYPT_ECB_ALT were ignored.
+     This does not concern the implementation provided with Mbed TLS,
+     where this function cannot fail, or full-module replacements with
+     MBEDTLS_AES_ALT or MBEDTLS_DES_ALT. Reported by Armelle Duboc in #1092.
+
+Features
+   * Warn if errors from certain functions are ignored. This is currently
+     supported on GCC-like compilers and on MSVC and can be configured through
+     the macro MBEDTLS_CHECK_RETURN. The warnings are always enabled
+     (where supported) for critical functions where ignoring the return
+     value is almost always a bug. Enable the new configuration option
+     MBEDTLS_CHECK_RETURN_WARNING to get warnings for other functions. This
+     is currently implemented in the AES and DES modules, and will be extended
+     to other modules in the future.

mbedtls.mod/mbedtls/ChangeLog.d/chunked_ccm.txt

@@ -0,0 +1,8 @@
+Changes
+   * Implement multi-part CCM API.
+     The multi-part functions: mbedtls_ccm_starts(), mbedtls_ccm_set_lengths(),
+     mbedtls_ccm_update_ad(), mbedtls_ccm_update(), mbedtls_ccm_finish()
+     were introduced in mbedTLS 3.0 release, however their implementation was
+     postponed until now.
+     Implemented functions support chunked data input for both CCM and CCM*
+     algorithms.

mbedtls.mod/mbedtls/ChangeLog.d/constant_time_module.txt

@@ -0,0 +1,10 @@
+Changes
+    * The mbedcrypto library includes a new source code module constant_time.c,
+      containing various functions meant to resist timing side channel attacks.
+      This module does not have a separate configuration option, and functions
+      from this module will be included in the build as required. Currently
+      most of the interface of this module is private and may change at any
+      time.
+
+Features
+    * Add new API mbedtls_ct_memcmp for constant time buffer comparison.

mbedtls.mod/mbedtls/ChangeLog.d/do-not-use-obsolete-header.txt

@@ -0,0 +1,5 @@
+Bugfix
+   * Don't use the obsolete header path sys/fcntl.h in unit tests.
+     These header files cause compilation errors in musl.
+     Fixes #4969.
+

mbedtls.mod/mbedtls/ChangeLog.d/fix-cipher-output-size-macros.txt

@@ -0,0 +1,4 @@
+Bugfix
+   * Prevent divide by zero if either of PSA_CIPHER_ENCRYPT_OUTPUT_SIZE() or
+     PSA_CIPHER_UPDATE_OUTPUT_SIZE() were called using an asymmetric key type.
+

mbedtls.mod/mbedtls/ChangeLog.d/fix-mbedtls_cipher_crypt-aes-ecb.txt

@@ -0,0 +1,2 @@
+Bugfix
+   * Fix mbedtls_cipher_crypt: AES-ECB when MBEDTLS_USE_PSA_CRYPTO is enabled.

mbedtls.mod/mbedtls/ChangeLog.d/fix-needed-shared-libraries-linux.txt

@@ -0,0 +1,3 @@
+Bugfix
+   * Fix issue in Makefile on Linux with SHARED=1, that caused shared libraries
+     not to list other shared libraries they need.

mbedtls.mod/mbedtls/ChangeLog.d/fix-psa_gen_key-status.txt

@@ -0,0 +1,2 @@
+Bugfix
+   * Fix the error returned by psa_generate_key() for a public key. Fixes #4551.

mbedtls.mod/mbedtls/ChangeLog.d/fix_compilation_ssl_tests.txt

@@ -0,0 +1,3 @@
+Bugfix
+   * Fix an uninitialized variable warning in test_suite_ssl.function with GCC
+     version 11.

mbedtls.mod/mbedtls/ChangeLog.d/issue4630.txt

@@ -0,0 +1,2 @@
+Bugfix
+   * Stop using reserved identifiers as local variables. Fixes #4630.

mbedtls.mod/mbedtls/ChangeLog.d/issue5065.txt

@@ -0,0 +1,3 @@
+Bugfix
+   * Fix compile-time or run-time errors in PSA
+     AEAD functions when ChachaPoly is disabled. Fixes #5065.

mbedtls.mod/mbedtls/ChangeLog.d/makefile-python-windows.txt

@@ -0,0 +1,4 @@
+Bugfix
+   * The GNU makefiles invoke python3 in preference to python except on Windows.
+     The check was accidentally not performed when cross-compiling for Windows
+     on Linux. Fix this. Fixes #4774.

mbedtls.mod/mbedtls/ChangeLog.d/muladdc-memory.txt

@@ -0,0 +1,5 @@
+Bugfix
+   * Fix missing constraints on x86_64 and aarch64 assembly code
+     for bignum multiplication that broke some bignum operations with
+     (at least) Clang 12.
+     Fixes #4116, #4786, #4917, #4962.

mbedtls.mod/mbedtls/ChangeLog.d/no-strerror.txt

@@ -0,0 +1,3 @@
+Bugfix
+   * Fix the build of sample programs when neither MBEDTLS_ERROR_C nor
+     MBEDTLS_ERROR_STRERROR_DUMMY is enabled.

mbedtls.mod/mbedtls/ChangeLog.d/psa_alg_rsa_pss.txt

@@ -0,0 +1,5 @@
+Bugfix
+   * Fix PSA_ALG_RSA_PSS verification accepting an arbitrary salt length.
+     This algorithm now accepts only the same salt length for verification
+     that it produces when signing, as documented. Use the new algorithm
+     PSA_ALG_RSA_PSS_ANY_SALT to accept any salt length. Fixes #4946.

mbedtls.mod/mbedtls/ChangeLog.d/psa_cipher_update_ecp.txt

@@ -0,0 +1,2 @@
+Bugfix
+   * Fix a parameter set but unused in psa_crypto_cipher.c. Fixes #4935.

mbedtls.mod/mbedtls/ChangeLog.d/psa_crypto_api_macros.txt

@@ -0,0 +1,11 @@
+Features
+   * Add missing PSA macros declared by PSA Crypto API 1.0.0:
+     PSA_ALG_IS_SIGN_HASH, PSA_ALG_NONE, PSA_HASH_BLOCK_LENGTH, PSA_KEY_ID_NULL.
+
+Bugfix
+   * The existing predicate macro name PSA_ALG_IS_HASH_AND_SIGN is now reserved
+     for algorithm values that fully encode the hashing step, as per the PSA
+     Crypto API specification. This excludes PSA_ALG_RSA_PKCS1V15_SIGN_RAW and
+     PSA_ALG_ECDSA_ANY. The new predicate macro PSA_ALG_IS_SIGN_HASH covers
+     all algorithms that can be used with psa_{sign,verify}_hash(), including
+     these two.

mbedtls.mod/mbedtls/ChangeLog.d/psa_curve448_key_support.txt

@@ -0,0 +1,3 @@
+Features
+   * Enable support for Curve448 via the PSA API. Contributed by
+     Archana Madhavan in #4626. Fixes #3399 and #4249.

mbedtls.mod/mbedtls/ChangeLog.d/psa_gcm_buffer_limitation.txt

@@ -0,0 +1,16 @@
+Bugfix
+   * Remove PSA'a AEAD finish/verify output buffer limitation for GCM.
+     The requirement of minimum 15 bytes for output buffer in
+     psa_aead_finish() and psa_aead_verify() does not apply to the built-in
+     implementation of GCM.
+   * Move GCM's update output buffer length verification from PSA AEAD to
+     the built-in implementation of the GCM.
+     The requirement for output buffer size to be equal or greater then
+     input buffer size is valid only for the built-in implementation of GCM.
+     Alternative GCM implementations can process whole blocks only.
+
+API changes
+   * New error code for GCM: MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL.
+     Alternative GCM implementations are expected to verify
+     the length of the provided output buffers and to return the
+     MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL in case the buffer length is too small.

mbedtls.mod/mbedtls/ChangeLog.d/remove-greentea-support.txt

@@ -0,0 +1,3 @@
+Removals
+   * Remove the partial support for running unit tests via Greentea on Mbed OS,
+     which had been unmaintained since 2018.

mbedtls.mod/mbedtls/ChangeLog.d/remove-ssl-export-keys.txt

@@ -0,0 +1,5 @@
+Changes
+   * Remove MBEDTLS_SSL_EXPORT_KEYS, making it always on and increasing the
+     code size by about 80B on an M0 build. This option only gated an ability
+     to set a callback, but was deemed unnecessary as it was yet another define
+     to remember when writing tests, or test configurations. Fixes #4653.

mbedtls.mod/mbedtls/ChangeLog.d/session_export_private.txt

@@ -0,0 +1,5 @@
+Changes
+    * Explicitly mark the fields mbedtls_ssl_session.exported and
+      mbedtls_ssl_config.respect_cli_pref as private. This was an
+      oversight during the run-up to the release of Mbed TLS 3.0.
+      The fields were never intended to be public.

mbedtls.mod/mbedtls/ChangeLog.d/tls_ext_cid-config.txt

@@ -0,0 +1,3 @@
+Features
+   * The identifier of the CID TLS extension can be configured by defining
+     MBEDTLS_TLS_EXT_CID at compile time.

mbedtls.mod/mbedtls/DartConfiguration.tcl

@@ -0,0 +1,4 @@
+Site: localhost
+BuildName: mbed TLS-test
+CoverageCommand: /usr/bin/gcov
+MemoryCheckCommand: /usr/bin/valgrind

mbedtls.mod/mbedtls/LICENSE

@@ -0,0 +1,202 @@
+
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mbedtls.mod/mbedtls/Makefile

@@ -0,0 +1,188 @@
+DESTDIR=/usr/local
+PREFIX=mbedtls_
+PERL ?= perl
+
+.SILENT:
+
+.PHONY: all no_test programs lib tests install uninstall clean test check covtest lcov apidoc apidoc_clean
+
+all: programs tests
+	$(MAKE) post_build
+
+no_test: programs
+
+programs: lib mbedtls_test
+	$(MAKE) -C programs
+
+lib:
+	$(MAKE) -C library
+
+tests: lib mbedtls_test
+	$(MAKE) -C tests
+
+mbedtls_test:
+	$(MAKE) -C tests mbedtls_test
+
+library/%:
+	$(MAKE) -C library $*
+programs/%:
+	$(MAKE) -C programs $*
+tests/%:
+	$(MAKE) -C tests $*
+
+.PHONY: generated_files
+generated_files: library/generated_files
+generated_files: programs/generated_files
+generated_files: tests/generated_files
+generated_files: visualc_files
+
+.PHONY: visualc_files
+VISUALC_FILES = visualc/VS2010/mbedTLS.sln visualc/VS2010/mbedTLS.vcxproj
+# TODO: $(app).vcxproj for each $(app) in programs/
+visualc_files: $(VISUALC_FILES)
+
+# Ensure that the .c files that generate_visualc_files.pl enumerates are
+# present before it runs. It doesn't matter if the files aren't up-to-date,
+# they just need to be present.
+$(VISUALC_FILES): | library/generated_files
+$(VISUALC_FILES): scripts/generate_visualc_files.pl
+$(VISUALC_FILES): scripts/data_files/vs2010-app-template.vcxproj
+$(VISUALC_FILES): scripts/data_files/vs2010-main-template.vcxproj
+$(VISUALC_FILES): scripts/data_files/vs2010-sln-template.sln
+# TODO: also the list of .c and .h source files, but not their content
+$(VISUALC_FILES):
+	echo "  Gen   $@ ..."
+	$(PERL) scripts/generate_visualc_files.pl
+
+ifndef WINDOWS
+install: no_test
+	mkdir -p $(DESTDIR)/include/mbedtls
+	cp -rp include/mbedtls $(DESTDIR)/include
+	mkdir -p $(DESTDIR)/include/psa
+	cp -rp include/psa $(DESTDIR)/include
+
+	mkdir -p $(DESTDIR)/lib
+	cp -RP library/libmbedtls.*    $(DESTDIR)/lib
+	cp -RP library/libmbedx509.*   $(DESTDIR)/lib
+	cp -RP library/libmbedcrypto.* $(DESTDIR)/lib
+
+	mkdir -p $(DESTDIR)/bin
+	for p in programs/*/* ; do              \
+	    if [ -x $$p ] && [ ! -d $$p ] ;     \
+	    then                                \
+	        f=$(PREFIX)`basename $$p` ;     \
+	        cp $$p $(DESTDIR)/bin/$$f ;     \
+	    fi                                  \
+	done
+
+uninstall:
+	rm -rf $(DESTDIR)/include/mbedtls
+	rm -rf $(DESTDIR)/include/psa
+	rm -f $(DESTDIR)/lib/libmbedtls.*
+	rm -f $(DESTDIR)/lib/libmbedx509.*
+	rm -f $(DESTDIR)/lib/libmbedcrypto.*
+
+	for p in programs/*/* ; do              \
+	    if [ -x $$p ] && [ ! -d $$p ] ;     \
+	    then                                \
+	        f=$(PREFIX)`basename $$p` ;     \
+	        rm -f $(DESTDIR)/bin/$$f ;      \
+	    fi                                  \
+	done
+endif
+
+
+WARNING_BORDER_LONG      =**********************************************************************************\n
+CTR_DRBG_128_BIT_KEY_WARN_L1=****  WARNING!  MBEDTLS_CTR_DRBG_USE_128_BIT_KEY defined!                      ****\n
+CTR_DRBG_128_BIT_KEY_WARN_L2=****  Using 128-bit keys for CTR_DRBG limits the security of generated         ****\n
+CTR_DRBG_128_BIT_KEY_WARN_L3=****  keys and operations that use random values generated to 128-bit security ****\n
+
+CTR_DRBG_128_BIT_KEY_WARNING=\n$(WARNING_BORDER_LONG)$(CTR_DRBG_128_BIT_KEY_WARN_L1)$(CTR_DRBG_128_BIT_KEY_WARN_L2)$(CTR_DRBG_128_BIT_KEY_WARN_L3)$(WARNING_BORDER_LONG)
+
+# Post build steps
+post_build:
+ifndef WINDOWS
+
+	# If 128-bit keys are configured for CTR_DRBG, display an appropriate warning
+	-scripts/config.py get MBEDTLS_CTR_DRBG_USE_128_BIT_KEY && ([ $$? -eq 0 ]) && \
+	    echo '$(CTR_DRBG_128_BIT_KEY_WARNING)'
+
+endif
+
+clean: clean_more_on_top
+	$(MAKE) -C library clean
+	$(MAKE) -C programs clean
+	$(MAKE) -C tests clean
+
+clean_more_on_top:
+ifndef WINDOWS
+	find . \( -name \*.gcno -o -name \*.gcda -o -name \*.info \) -exec rm {} +
+endif
+
+neat: clean_more_on_top
+	$(MAKE) -C library neat
+	$(MAKE) -C programs neat
+	$(MAKE) -C tests neat
+ifndef WINDOWS
+	rm -f visualc/VS2010/*.vcxproj visualc/VS2010/mbedTLS.sln
+else
+	if exist visualc\VS2010\*.vcxproj del /Q /F visualc\VS2010\*.vcxproj
+	if exist visualc\VS2010\mbedTLS.sln del /Q /F visualc\VS2010\mbedTLS.sln
+endif
+
+check: lib tests
+	$(MAKE) -C tests check
+
+test: check
+
+ifndef WINDOWS
+# note: for coverage testing, build with:
+# make CFLAGS='--coverage -g3 -O0'
+covtest:
+	$(MAKE) check
+	programs/test/selftest
+	tests/compat.sh
+	tests/ssl-opt.sh
+
+lcov:
+	rm -rf Coverage
+	lcov --capture --initial --directory library -o files.info
+	lcov --rc lcov_branch_coverage=1 --capture --directory library -o tests.info
+	lcov --rc lcov_branch_coverage=1 --add-tracefile files.info --add-tracefile tests.info -o all.info
+	lcov --rc lcov_branch_coverage=1 --remove all.info -o final.info '*.h'
+	gendesc tests/Descriptions.txt -o descriptions
+	genhtml --title "mbed TLS" --description-file descriptions --keep-descriptions --legend --branch-coverage -o Coverage final.info
+	rm -f files.info tests.info all.info final.info descriptions
+
+apidoc:
+	mkdir -p apidoc
+	cd doxygen && doxygen mbedtls.doxyfile
+
+apidoc_clean:
+	rm -rf apidoc
+endif
+
+## Editor navigation files
+C_SOURCE_FILES = $(wildcard \
+	3rdparty/*/include/*/*.h 3rdparty/*/include/*/*/*.h 3rdparty/*/include/*/*/*/*.h \
+	3rdparty/*/*.c 3rdparty/*/*/*.c 3rdparty/*/*/*/*.c 3rdparty/*/*/*/*/*.c \
+	include/*/*.h \
+	library/*.[hc] \
+	programs/*/*.[hc] \
+	tests/include/*/*.h tests/include/*/*/*.h \
+	tests/src/*.c tests/src/*/*.c \
+	tests/suites/*.function \
+)
+# Exuberant-ctags invocation. Other ctags implementations may require different options.
+CTAGS = ctags --langmap=c:+.h.function --line-directives=no -o
+tags: $(C_SOURCE_FILES)
+	$(CTAGS) $@ $(C_SOURCE_FILES)
+TAGS: $(C_SOURCE_FILES)
+	etags --no-line-directive -o $@ $(C_SOURCE_FILES)
+global: GPATH GRTAGS GSYMS GTAGS
+GPATH GRTAGS GSYMS GTAGS: $(C_SOURCE_FILES)
+	ls $(C_SOURCE_FILES) | gtags -f - --gtagsconf .globalrc
+cscope: cscope.in.out cscope.po.out cscope.out
+cscope.in.out cscope.po.out cscope.out: $(C_SOURCE_FILES)
+	cscope -bq -u -Iinclude -Ilibrary $(patsubst %,-I%,$(wildcard 3rdparty/*/include)) -Itests/include $(C_SOURCE_FILES)
+.PHONY: cscope global

mbedtls.mod/mbedtls/README.md

@@ -0,0 +1,308 @@
+README for Mbed TLS
+===================
+
+Mbed TLS is a C library that implements cryptographic primitives, X.509 certificate manipulation and the SSL/TLS and DTLS protocols. Its small code footprint makes it suitable for embedded systems.
+
+Mbed TLS includes a reference implementation of the [PSA Cryptography API](#psa-cryptography-api). This is currently a preview for evaluation purposes only.
+
+Configuration
+-------------
+
+Mbed TLS should build out of the box on most systems. Some platform specific options are available in the fully documented configuration file `include/mbedtls/mbedtls_config.h`, which is also the place where features can be selected. This file can be edited manually, or in a more programmatic way using the Python 3 script `scripts/config.py` (use `--help` for usage instructions).
+
+Compiler options can be set using conventional environment variables such as `CC` and `CFLAGS` when using the Make and CMake build system (see below).
+
+We provide some non-standard configurations focused on specific use cases in the `configs/` directory. You can read more about those in `configs/README.txt`
+
+Documentation
+-------------
+
+Documentation for the Mbed TLS interfaces in the default library configuration is available as part of the [Mbed TLS documentation](https://tls.mbed.org/api/).
+
+To generate a local copy of the library documentation in HTML format, tailored to your compile-time configuration:
+
+1. Make sure that [Doxygen](http://www.doxygen.nl/) is installed.
+1. Run `make apidoc`.
+1. Browse `apidoc/index.html` or `apidoc/modules.html`.
+
+For other sources of documentation, see the [SUPPORT](SUPPORT.md) document.
+
+Compiling
+---------
+
+There are currently three active build systems used within Mbed TLS releases:
+
+-   GNU Make
+-   CMake
+-   Microsoft Visual Studio
+
+The main systems used for development are CMake and GNU Make. Those systems are always complete and up-to-date. The others should reflect all changes present in the CMake and Make build system, although features may not be ported there automatically.
+
+The Make and CMake build systems create three libraries: libmbedcrypto, libmbedx509, and libmbedtls. Note that libmbedtls depends on libmbedx509 and libmbedcrypto, and libmbedx509 depends on libmbedcrypto. As a result, some linkers will expect flags to be in a specific order, for example the GNU linker wants `-lmbedtls -lmbedx509 -lmbedcrypto`.
+
+### Tool versions
+
+You need the following tools to build the library with the provided makefiles:
+
+* GNU Make 3.82 or a build tool that CMake supports.
+* A C99 toolchain (compiler, linker, archiver). We actively test with GCC 5.4, Clang 3.8, IAR 8 and Visual Studio 2013. More recent versions should work. Slightly older versions may work.
+* Python 3.6 to generate the test code, and to generate sample programs in the development branch.
+* Perl to run the tests, and to generate some source files in the development branch.
+* CMake 3.10.2 or later (if using CMake).
+* Microsoft Visual Studio 2013 or later (if using Visual Studio).
+* Doxygen 1.8.11 or later (if building the documentation; slightly older versions should work).
+
+### Generated source files in the development branch
+
+The source code of Mbed TLS includes some files that are automatically generated by scripts and whose content depends only on the Mbed TLS source, not on the platform or on the library configuration. These files are not included in the development branch of Mbed TLS, but the generated files are included in official releases. This section explains how to generate the missing files in the development branch.
+
+The following tools are required:
+
+* Perl, for some library source files and for Visual Studio build files.
+* Python 3, for some sample programs and test data.
+* A C compiler for the host platform, for some test data.
+
+If you are cross-compiling, you must set the `CC` environment variable to a C compiler for the host platform when generating the configuration-independent files.
+
+Any of the following methods are available to generate the configuration-independent files:
+
+* If not cross-compiling, running `make` with any target, or just `make`, will automatically generate required files.
+* On non-Windows systems, when not cross-compiling, CMake will generate the required files automatically.
+* Run `make generated_files` to generate all the configuration-independent files.
+* On Unix/POSIX systems, run `tests/scripts/check-generated-files.sh -u` to generate all the configuration-independent files.
+* On Windows, run `scripts\make_generated_files.bat` to generate all the configuration-independent files.
+
+### Make
+
+We require GNU Make. To build the library and the sample programs, GNU Make and a C compiler are sufficient. Some of the more advanced build targets require some Unix/Linux tools.
+
+We intentionally only use a minimum of functionality in the makefiles in order to keep them as simple and independent of different toolchains as possible, to allow users to more easily move between different platforms. Users who need more features are recommended to use CMake.
+
+In order to build from the source code using GNU Make, just enter at the command line:
+
+    make
+
+In order to run the tests, enter:
+
+    make check
+
+The tests need Python to be built and Perl to be run. If you don't have one of them installed, you can skip building the tests with:
+
+    make no_test
+
+You'll still be able to run a much smaller set of tests with:
+
+    programs/test/selftest
+
+In order to build for a Windows platform, you should use `WINDOWS_BUILD=1` if the target is Windows but the build environment is Unix-like (for instance when cross-compiling, or compiling from an MSYS shell), and `WINDOWS=1` if the build environment is a Windows shell (for instance using mingw32-make) (in that case some targets will not be available).
+
+Setting the variable `SHARED` in your environment will build shared libraries in addition to the static libraries. Setting `DEBUG` gives you a debug build. You can override `CFLAGS` and `LDFLAGS` by setting them in your environment or on the make command line; compiler warning options may be overridden separately using `WARNING_CFLAGS`. Some directory-specific options (for example, `-I` directives) are still preserved.
+
+Please note that setting `CFLAGS` overrides its default value of `-O2` and setting `WARNING_CFLAGS` overrides its default value (starting with `-Wall -Wextra`), so if you just want to add some warning options to the default ones, you can do so by setting `CFLAGS=-O2 -Werror` for example. Setting `WARNING_CFLAGS` is useful when you want to get rid of its default content (for example because your compiler doesn't accept `-Wall` as an option). Directory-specific options cannot be overridden from the command line.
+
+Depending on your platform, you might run into some issues. Please check the Makefiles in `library/`, `programs/` and `tests/` for options to manually add or remove for specific platforms. You can also check [the Mbed TLS Knowledge Base](https://tls.mbed.org/kb) for articles on your platform or issue.
+
+In case you find that you need to do something else as well, please let us know what, so we can add it to the [Mbed TLS Knowledge Base](https://tls.mbed.org/kb).
+
+### CMake
+
+In order to build the source using CMake in a separate directory (recommended), just enter at the command line:
+
+    mkdir /path/to/build_dir && cd /path/to/build_dir
+    cmake /path/to/mbedtls_source
+    cmake --build .
+
+In order to run the tests, enter:
+
+    ctest
+
+The test suites need Python to be built and Perl to be executed. If you don't have one of these installed, you'll want to disable the test suites with:
+
+    cmake -DENABLE_TESTING=Off /path/to/mbedtls_source
+
+If you disabled the test suites, but kept the programs enabled, you can still run a much smaller set of tests with:
+
+    programs/test/selftest
+
+To configure CMake for building shared libraries, use:
+
+    cmake -DUSE_SHARED_MBEDTLS_LIBRARY=On /path/to/mbedtls_source
+
+There are many different build modes available within the CMake buildsystem. Most of them are available for gcc and clang, though some are compiler-specific:
+
+-   `Release`. This generates the default code without any unnecessary information in the binary files.
+-   `Debug`. This generates debug information and disables optimization of the code.
+-   `Coverage`. This generates code coverage information in addition to debug information.
+-   `ASan`. This instruments the code with AddressSanitizer to check for memory errors. (This includes LeakSanitizer, with recent version of gcc and clang.) (With recent version of clang, this mode also instruments the code with UndefinedSanitizer to check for undefined behaviour.)
+-   `ASanDbg`. Same as ASan but slower, with debug information and better stack traces.
+-   `MemSan`. This instruments the code with MemorySanitizer to check for uninitialised memory reads. Experimental, needs recent clang on Linux/x86\_64.
+-   `MemSanDbg`. Same as MemSan but slower, with debug information, better stack traces and origin tracking.
+-   `Check`. This activates the compiler warnings that depend on optimization and treats all warnings as errors.
+
+Switching build modes in CMake is simple. For debug mode, enter at the command line:
+
+    cmake -D CMAKE_BUILD_TYPE=Debug /path/to/mbedtls_source
+
+To list other available CMake options, use:
+
+    cmake -LH
+
+Note that, with CMake, you can't adjust the compiler or its flags after the
+initial invocation of cmake. This means that `CC=your_cc make` and `make
+CC=your_cc` will *not* work (similarly with `CFLAGS` and other variables).
+These variables need to be adjusted when invoking cmake for the first time,
+for example:
+
+    CC=your_cc cmake /path/to/mbedtls_source
+
+If you already invoked cmake and want to change those settings, you need to
+remove the build directory and create it again.
+
+Note that it is possible to build in-place; this will however overwrite the
+provided Makefiles (see `scripts/tmp_ignore_makefiles.sh` if you want to
+prevent `git status` from showing them as modified). In order to do so, from
+the Mbed TLS source directory, use:
+
+    cmake .
+    make
+
+If you want to change `CC` or `CFLAGS` afterwards, you will need to remove the
+CMake cache. This can be done with the following command using GNU find:
+
+    find . -iname '*cmake*' -not -name CMakeLists.txt -exec rm -rf {} +
+
+You can now make the desired change:
+
+    CC=your_cc cmake .
+    make
+
+Regarding variables, also note that if you set CFLAGS when invoking cmake,
+your value of CFLAGS doesn't override the content provided by cmake (depending
+on the build mode as seen above), it's merely prepended to it.
+
+#### Consuming Mbed TLS
+
+Mbed TLS provides a package config file for consumption as a dependency in other
+CMake projects. You can include Mbed TLS's CMake targets yourself with:
+
+    find_package(MbedTLS)
+
+If prompted, set `MbedTLS_DIR` to `${YOUR_MBEDTLS_INSTALL_DIR}/cmake`. This
+creates the following targets:
+
+- `MbedTLS::mbedcrypto` (Crypto library)
+- `MbedTLS::mbedtls` (TLS library)
+- `MbedTLS::mbedx509` (X509 library)
+
+You can then use these directly through `target_link_libraries()`:
+
+    add_executable(xyz)
+
+    target_link_libraries(xyz
+        PUBLIC MbedTLS::mbedtls
+               MbedTLS::mbedcrypto
+               MbedTLS::mbedx509)
+
+This will link the Mbed TLS libraries to your library or application, and add
+its include directories to your target (transitively, in the case of `PUBLIC` or
+`INTERFACE` link libraries).
+
+#### Mbed TLS as a subproject
+
+Mbed TLS supports being built as a CMake subproject. One can
+use `add_subdirectory()` from a parent CMake project to include Mbed TLS as a
+subproject.
+
+### Microsoft Visual Studio
+
+The build files for Microsoft Visual Studio are generated for Visual Studio 2010.
+
+The solution file `mbedTLS.sln` contains all the basic projects needed to build the library and all the programs. The files in tests are not generated and compiled, as these need Python and perl environments as well. However, the selftest program in `programs/test/` is still available.
+
+In the development branch of Mbed TLS, the Visual Studio solution files need to be generated first as described in [“Generated source files in the development branch”](#generated-source-files-in-the-development-branch).
+
+Example programs
+----------------
+
+We've included example programs for a lot of different features and uses in [`programs/`](programs/README.md).
+Please note that the goal of these sample programs is to demonstrate specific features of the library, and the code may need to be adapted to build a real-world application.
+
+Tests
+-----
+
+Mbed TLS includes an elaborate test suite in `tests/` that initially requires Python to generate the tests files (e.g. `test\_suite\_mpi.c`). These files are generated from a `function file` (e.g. `suites/test\_suite\_mpi.function`) and a `data file` (e.g. `suites/test\_suite\_mpi.data`). The `function file` contains the test functions. The `data file` contains the test cases, specified as parameters that will be passed to the test function.
+
+For machines with a Unix shell and OpenSSL (and optionally GnuTLS) installed, additional test scripts are available:
+
+-   `tests/ssl-opt.sh` runs integration tests for various TLS options (renegotiation, resumption, etc.) and tests interoperability of these options with other implementations.
+-   `tests/compat.sh` tests interoperability of every ciphersuite with other implementations.
+-   `tests/scripts/test-ref-configs.pl` test builds in various reduced configurations.
+-   `tests/scripts/key-exchanges.pl` test builds in configurations with a single key exchange enabled
+-   `tests/scripts/all.sh` runs a combination of the above tests, plus some more, with various build options (such as ASan, full `mbedtls_config.h`, etc).
+
+Porting Mbed TLS
+----------------
+
+Mbed TLS can be ported to many different architectures, OS's and platforms. Before starting a port, you may find the following Knowledge Base articles useful:
+
+-   [Porting Mbed TLS to a new environment or OS](https://tls.mbed.org/kb/how-to/how-do-i-port-mbed-tls-to-a-new-environment-OS)
+-   [What external dependencies does Mbed TLS rely on?](https://tls.mbed.org/kb/development/what-external-dependencies-does-mbedtls-rely-on)
+-   [How do I configure Mbed TLS](https://tls.mbed.org/kb/compiling-and-building/how-do-i-configure-mbedtls)
+
+PSA cryptography API
+--------------------
+
+### PSA API design
+
+Arm's [Platform Security Architecture (PSA)](https://developer.arm.com/architectures/security-architectures/platform-security-architecture) is a holistic set of threat models, security analyses, hardware and firmware architecture specifications, and an open source firmware reference implementation. PSA provides a recipe, based on industry best practice, that allows security to be consistently designed in, at both a hardware and firmware level.
+
+The [PSA cryptography API](https://armmbed.github.io/mbed-crypto/psa/#application-programming-interface) provides access to a set of cryptographic primitives. It has a dual purpose. First, it can be used in a PSA-compliant platform to build services, such as secure boot, secure storage and secure communication. Second, it can also be used independently of other PSA components on any platform.
+
+The design goals of the PSA cryptography API include:
+
+* The API distinguishes caller memory from internal memory, which allows the library to be implemented in an isolated space for additional security. Library calls can be implemented as direct function calls if isolation is not desired, and as remote procedure calls if isolation is desired.
+* The structure of internal data is hidden to the application, which allows substituting alternative implementations at build time or run time, for example, in order to take advantage of hardware accelerators.
+* All access to the keys happens through key identifiers, which allows support for external cryptoprocessors that is transparent to applications.
+* The interface to algorithms is generic, favoring algorithm agility.
+* The interface is designed to be easy to use and hard to accidentally misuse.
+
+Arm welcomes feedback on the design of the API. If you think something could be improved, please open an issue on our Github repository. Alternatively, if you prefer to provide your feedback privately, please email us at [`[email protected]`](mailto:[email protected]). All feedback received by email is treated confidentially.
+
+### PSA API documentation
+
+A browsable copy of the PSA Cryptography API documents is available on the [PSA cryptography interfaces documentation portal](https://armmbed.github.io/mbed-crypto/psa/#application-programming-interface) in [PDF](https://armmbed.github.io/mbed-crypto/PSA_Cryptography_API_Specification.pdf) and [HTML](https://armmbed.github.io/mbed-crypto/html/index.html) formats.
+
+### PSA implementation in Mbed TLS
+
+Mbed TLS includes a reference implementation of the PSA Cryptography API.
+This implementation is not yet as mature as the rest of the library. Some parts of the code have not been reviewed as thoroughly, and some parts of the PSA implementation are not yet well optimized for code size.
+
+The X.509 and TLS code can use PSA cryptography for a limited subset of operations. To enable this support, activate the compilation option `MBEDTLS_USE_PSA_CRYPTO` in `mbedtls_config.h`.
+
+There are currently a few deviations where the library does not yet implement the latest version of the specification. Please refer to the [compliance issues on Github](https://github.com/ARMmbed/mbed-crypto/labels/compliance) for an up-to-date list.
+
+### Upcoming features
+
+Future releases of this library will include:
+
+* A driver programming interface, which makes it possible to use hardware accelerators instead of the default software implementation for chosen algorithms.
+* Support for external keys to be stored and manipulated exclusively in a separate cryptoprocessor.
+* A configuration mechanism to compile only the algorithms you need for your application.
+* A wider set of cryptographic algorithms.
+
+License
+-------
+
+Unless specifically indicated otherwise in a file, Mbed TLS files are provided under the [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) license. See the [LICENSE](LICENSE) file for the full text of this license. Contributors must accept that their contributions are made under both the Apache-2.0 AND [GPL-2.0-or-later](https://spdx.org/licenses/GPL-2.0-or-later.html) licenses. This enables LTS (Long Term Support) branches of the software to be provided under either the Apache-2.0 OR GPL-2.0-or-later licenses.
+
+Contributing
+------------
+
+We gratefully accept bug reports and contributions from the community. Please see the [contributing guidelines](CONTRIBUTING.md) for details on how to do this.
+
+Contact
+-------
+
+* To report a security vulnerability in Mbed TLS, please email <[email protected]>. For more information, see [`SECURITY.md`](SECURITY.md).
+* To report a bug or request a feature in Mbed TLS, please [file an issue on GitHub](https://github.com/ARMmbed/mbedtls/issues/new/choose).
+* Please see [`SUPPORT.md`](SUPPORT.md) for other channels for discussion and support about Mbed TLS.

mbedtls.mod/mbedtls/SECURITY.md

@@ -0,0 +1,20 @@
+## Reporting Vulneratibilities
+
+If you think you have found an Mbed TLS security vulnerability, then please
+send an email to the security team at
+<[email protected]>.
+
+## Security Incident Handling Process
+
+Our security process is detailled in our
+[security
+center](https://developer.trustedfirmware.org/w/mbed-tls/security-center/).
+
+Its primary goal is to ensure fixes are ready to be deployed when the issue
+goes public.
+
+## Maintained branches
+
+Only the maintained branches, as listed in [`BRANCHES.md`](BRANCHES.md),
+get security fixes.
+Users are urged to always use the latest version of a maintained branch.

mbedtls.mod/mbedtls/SUPPORT.md

@@ -0,0 +1,15 @@
+## Documentation
+
+Here are some useful sources of information about using Mbed TLS:
+
+- API documentation, see the [Documentation section of the
+  README](README.md#License);
+- the `docs` directory in the source tree;
+- the [Mbed TLS knowledge Base](https://tls.mbed.org/kb);
+- the [Mbed TLS mailing-list
+  archives](https://lists.trustedfirmware.org/pipermail/mbed-tls/).
+
+## Asking Questions
+
+If you can't find your answer in the above sources, please use the [Mbed TLS
+mailing list](https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls).

mbedtls.mod/mbedtls/cmake/MbedTLSConfig.cmake.in

@@ -0,0 +1,3 @@
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/MbedTLSTargets.cmake")

mbedtls.mod/mbedtls/configs/README.txt

@@ -0,0 +1,24 @@
+This directory contains example configuration files.
+
+The examples are generally focused on a particular usage case (eg, support for
+a restricted number of ciphersuites) and aim at minimizing resource usage for
+this target. They can be used as a basis for custom configurations.
+
+These files are complete replacements for the default mbedtls_config.h. To use one of
+them, you can pick one of the following methods:
+
+1. Replace the default file include/mbedtls/mbedtls_config.h with the chosen one.
+
+2. Define MBEDTLS_CONFIG_FILE and adjust the include path accordingly.
+   For example, using make:
+
+    CFLAGS="-I$PWD/configs -DMBEDTLS_CONFIG_FILE='<foo.h>'" make
+
+   Or, using cmake:
+
+    find . -iname '*cmake*' -not -name CMakeLists.txt -exec rm -rf {} +
+    CFLAGS="-I$PWD/configs -DMBEDTLS_CONFIG_FILE='<foo.h>'" cmake .
+    make
+
+Note that the second method also works if you want to keep your custom
+configuration file outside the mbed TLS tree.

mbedtls.mod/mbedtls/configs/config-ccm-psk-tls1_2.h

@@ -0,0 +1,85 @@
+/**
+ * \file config-ccm-psk-tls1_2.h
+ *
+ * \brief Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+/*
+ * Minimal configuration for TLS 1.2 with PSK and AES-CCM ciphersuites
+ * Distinguishing features:
+ * - no bignum, no PK, no X509
+ * - fully modern and secure (provided the pre-shared keys have high entropy)
+ * - very low record overhead with CCM-8
+ * - optimized for low RAM usage
+ *
+ * See README.txt for usage instructions.
+ */
+
+/* System support */
+//#define MBEDTLS_HAVE_TIME /* Optionally used in Hello messages */
+/* Other MBEDTLS_HAVE_XXX flags irrelevant for this configuration */
+
+/* mbed TLS feature support */
+#define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
+#define MBEDTLS_SSL_PROTO_TLS1_2
+
+/* mbed TLS modules */
+#define MBEDTLS_AES_C
+#define MBEDTLS_CCM_C
+#define MBEDTLS_CIPHER_C
+#define MBEDTLS_CTR_DRBG_C
+#define MBEDTLS_ENTROPY_C
+#define MBEDTLS_MD_C
+#define MBEDTLS_NET_C
+/* The library does not currently support enabling SHA-224 without SHA-256.
+ * A future version of the library will have this option disabled
+ * by default. */
+#define MBEDTLS_SHA224_C
+#define MBEDTLS_SHA256_C
+#define MBEDTLS_SSL_CLI_C
+#define MBEDTLS_SSL_SRV_C
+#define MBEDTLS_SSL_TLS_C
+
+/* Save RAM at the expense of ROM */
+#define MBEDTLS_AES_ROM_TABLES
+
+/* Save some RAM by adjusting to your exact needs */
+#define MBEDTLS_PSK_MAX_LEN    16 /* 128-bits keys are generally enough */
+
+/*
+ * You should adjust this to the exact number of sources you're using: default
+ * is the "platform_entropy_poll" source, but you may want to add other ones
+ * Minimum is 2 for the entropy test suite.
+ */
+#define MBEDTLS_ENTROPY_MAX_SOURCES 2
+
+/*
+ * Use only CCM_8 ciphersuites, and
+ * save ROM and a few bytes of RAM by specifying our own ciphersuite list
+ */
+#define MBEDTLS_SSL_CIPHERSUITES                        \
+        MBEDTLS_TLS_PSK_WITH_AES_256_CCM_8,             \
+        MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8
+
+/*
+ * Save RAM at the expense of interoperability: do this only if you control
+ * both ends of the connection!  (See comments in "mbedtls/ssl.h".)
+ * The optimal size here depends on the typical size of records.
+ */
+#define MBEDTLS_SSL_IN_CONTENT_LEN             1024
+#define MBEDTLS_SSL_OUT_CONTENT_LEN             1024

mbedtls.mod/mbedtls/configs/config-no-entropy.h

@@ -0,0 +1,85 @@
+/**
+ * \file config-no-entropy.h
+ *
+ * \brief Minimal configuration of features that do not require an entropy source
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+/*
+ * Minimal configuration of features that do not require an entropy source
+ * Distinguishing reatures:
+ * - no entropy module
+ * - no TLS protocol implementation available due to absence of an entropy
+ *   source
+ *
+ * See README.txt for usage instructions.
+ */
+
+/* System support */
+#define MBEDTLS_HAVE_ASM
+#define MBEDTLS_HAVE_TIME
+
+/* mbed TLS feature support */
+#define MBEDTLS_CIPHER_MODE_CBC
+#define MBEDTLS_CIPHER_PADDING_PKCS7
+#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
+#define MBEDTLS_ECP_DP_SECP384R1_ENABLED
+#define MBEDTLS_ECP_DP_CURVE25519_ENABLED
+#define MBEDTLS_ECP_NIST_OPTIM
+#define MBEDTLS_ECDSA_DETERMINISTIC
+#define MBEDTLS_PK_RSA_ALT_SUPPORT
+#define MBEDTLS_PKCS1_V15
+#define MBEDTLS_PKCS1_V21
+#define MBEDTLS_SELF_TEST
+#define MBEDTLS_VERSION_FEATURES
+
+/* mbed TLS modules */
+#define MBEDTLS_AES_C
+#define MBEDTLS_ASN1_PARSE_C
+#define MBEDTLS_ASN1_WRITE_C
+#define MBEDTLS_BASE64_C
+#define MBEDTLS_BIGNUM_C
+#define MBEDTLS_CCM_C
+#define MBEDTLS_CIPHER_C
+#define MBEDTLS_ECDSA_C
+#define MBEDTLS_ECP_C
+#define MBEDTLS_ERROR_C
+#define MBEDTLS_GCM_C
+#define MBEDTLS_HMAC_DRBG_C
+#define MBEDTLS_MD_C
+#define MBEDTLS_OID_C
+#define MBEDTLS_PEM_PARSE_C
+#define MBEDTLS_PK_C
+#define MBEDTLS_PK_PARSE_C
+#define MBEDTLS_PK_WRITE_C
+#define MBEDTLS_PLATFORM_C
+#define MBEDTLS_RSA_C
+/* The library does not currently support enabling SHA-224 without SHA-256.
+ * A future version of the library will have this option disabled
+ * by default. */
+#define MBEDTLS_SHA224_C
+#define MBEDTLS_SHA256_C
+#define MBEDTLS_SHA384_C
+#define MBEDTLS_SHA512_C
+#define MBEDTLS_VERSION_C
+#define MBEDTLS_X509_USE_C
+#define MBEDTLS_X509_CRT_PARSE_C
+#define MBEDTLS_X509_CRL_PARSE_C
+//#define MBEDTLS_CMAC_C
+
+/* Miscellaneous options */
+#define MBEDTLS_AES_ROM_TABLES

mbedtls.mod/mbedtls/configs/config-suite-b.h

@@ -0,0 +1,112 @@
+/**
+ * \file config-suite-b.h
+ *
+ * \brief Minimal configuration for TLS NSA Suite B Profile (RFC 6460)
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+/*
+ * Minimal configuration for TLS NSA Suite B Profile (RFC 6460)
+ *
+ * Distinguishing features:
+ * - no RSA or classic DH, fully based on ECC
+ * - optimized for low RAM usage
+ *
+ * Possible improvements:
+ * - if 128-bit security is enough, disable secp384r1 and SHA-512
+ * - use embedded certs in DER format and disable PEM_PARSE_C and BASE64_C
+ *
+ * See README.txt for usage instructions.
+ */
+
+/* System support */
+#define MBEDTLS_HAVE_ASM
+#define MBEDTLS_HAVE_TIME
+
+/* mbed TLS feature support */
+#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
+#define MBEDTLS_ECP_DP_SECP384R1_ENABLED
+#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
+#define MBEDTLS_SSL_PROTO_TLS1_2
+
+/* mbed TLS modules */
+#define MBEDTLS_AES_C
+#define MBEDTLS_ASN1_PARSE_C
+#define MBEDTLS_ASN1_WRITE_C
+#define MBEDTLS_BIGNUM_C
+#define MBEDTLS_CIPHER_C
+#define MBEDTLS_CTR_DRBG_C
+#define MBEDTLS_ECDH_C
+#define MBEDTLS_ECDSA_C
+#define MBEDTLS_ECP_C
+#define MBEDTLS_ENTROPY_C
+#define MBEDTLS_GCM_C
+#define MBEDTLS_MD_C
+#define MBEDTLS_NET_C
+#define MBEDTLS_OID_C
+#define MBEDTLS_PK_C
+#define MBEDTLS_PK_PARSE_C
+/* The library does not currently support enabling SHA-224 without SHA-256.
+ * A future version of the library will have this option disabled
+ * by default. */
+#define MBEDTLS_SHA224_C
+#define MBEDTLS_SHA256_C
+#define MBEDTLS_SHA384_C
+#define MBEDTLS_SHA512_C
+#define MBEDTLS_SSL_CLI_C
+#define MBEDTLS_SSL_SRV_C
+#define MBEDTLS_SSL_TLS_C
+#define MBEDTLS_X509_CRT_PARSE_C
+#define MBEDTLS_X509_USE_C
+
+/* For test certificates */
+#define MBEDTLS_BASE64_C
+#define MBEDTLS_PEM_PARSE_C
+
+/* Save RAM at the expense of ROM */
+#define MBEDTLS_AES_ROM_TABLES
+
+/* Save RAM by adjusting to our exact needs */
+#define MBEDTLS_MPI_MAX_SIZE    48 // 384-bit EC curve = 48 bytes
+
+/* Save RAM at the expense of speed, see ecp.h */
+#define MBEDTLS_ECP_WINDOW_SIZE        2
+#define MBEDTLS_ECP_FIXED_POINT_OPTIM  0
+
+/* Significant speed benefit at the expense of some ROM */
+#define MBEDTLS_ECP_NIST_OPTIM
+
+/*
+ * You should adjust this to the exact number of sources you're using: default
+ * is the "mbedtls_platform_entropy_poll" source, but you may want to add other ones.
+ * Minimum is 2 for the entropy test suite.
+ */
+#define MBEDTLS_ENTROPY_MAX_SOURCES 2
+
+/* Save ROM and a few bytes of RAM by specifying our own ciphersuite list */
+#define MBEDTLS_SSL_CIPHERSUITES                        \
+    MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,    \
+    MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+
+/*
+ * Save RAM at the expense of interoperability: do this only if you control
+ * both ends of the connection!  (See coments in "mbedtls/ssl.h".)
+ * The minimum size here depends on the certificate chain used as well as the
+ * typical size of records.
+ */
+#define MBEDTLS_SSL_IN_CONTENT_LEN             1024
+#define MBEDTLS_SSL_OUT_CONTENT_LEN             1024

mbedtls.mod/mbedtls/configs/config-symmetric-only.h

@@ -0,0 +1,89 @@
+/**
+ * \file config-symmetric-only.h
+ *
+ * \brief Configuration without any asymmetric cryptography.
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/* System support */
+//#define MBEDTLS_HAVE_ASM
+#define MBEDTLS_HAVE_TIME
+#define MBEDTLS_HAVE_TIME_DATE
+
+/* Mbed Crypto feature support */
+#define MBEDTLS_CIPHER_MODE_CBC
+#define MBEDTLS_CIPHER_MODE_CFB
+#define MBEDTLS_CIPHER_MODE_CTR
+#define MBEDTLS_CIPHER_MODE_OFB
+#define MBEDTLS_CIPHER_MODE_XTS
+#define MBEDTLS_CIPHER_PADDING_PKCS7
+#define MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS
+#define MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN
+#define MBEDTLS_CIPHER_PADDING_ZEROS
+#define MBEDTLS_ERROR_STRERROR_DUMMY
+#define MBEDTLS_FS_IO
+#define MBEDTLS_ENTROPY_NV_SEED
+#define MBEDTLS_SELF_TEST
+#define MBEDTLS_USE_PSA_CRYPTO
+#define MBEDTLS_VERSION_FEATURES
+
+/* Mbed Crypto modules */
+#define MBEDTLS_AES_C
+#define MBEDTLS_ASN1_PARSE_C
+#define MBEDTLS_ASN1_WRITE_C
+#define MBEDTLS_BASE64_C
+#define MBEDTLS_CAMELLIA_C
+#define MBEDTLS_ARIA_C
+#define MBEDTLS_CCM_C
+#define MBEDTLS_CHACHA20_C
+#define MBEDTLS_CHACHAPOLY_C
+#define MBEDTLS_CIPHER_C
+#define MBEDTLS_CMAC_C
+#define MBEDTLS_CTR_DRBG_C
+#define MBEDTLS_DES_C
+#define MBEDTLS_ENTROPY_C
+#define MBEDTLS_ERROR_C
+#define MBEDTLS_GCM_C
+#define MBEDTLS_HKDF_C
+#define MBEDTLS_HMAC_DRBG_C
+#define MBEDTLS_NIST_KW_C
+#define MBEDTLS_MD_C
+#define MBEDTLS_MD5_C
+#define MBEDTLS_OID_C
+#define MBEDTLS_PEM_PARSE_C
+#define MBEDTLS_PEM_WRITE_C
+#define MBEDTLS_PKCS5_C
+#define MBEDTLS_PKCS12_C
+#define MBEDTLS_PLATFORM_C
+#define MBEDTLS_POLY1305_C
+#define MBEDTLS_PSA_CRYPTO_C
+#define MBEDTLS_PSA_CRYPTO_SE_C
+#define MBEDTLS_PSA_CRYPTO_STORAGE_C
+#define MBEDTLS_PSA_ITS_FILE_C
+#define MBEDTLS_RIPEMD160_C
+#define MBEDTLS_SHA1_C
+/* The library does not currently support enabling SHA-224 without SHA-256.
+ * A future version of the library will have this option disabled
+ * by default. */
+#define MBEDTLS_SHA224_C
+#define MBEDTLS_SHA256_C
+#define MBEDTLS_SHA384_C
+#define MBEDTLS_SHA512_C
+//#define MBEDTLS_THREADING_C
+#define MBEDTLS_TIMING_C
+#define MBEDTLS_VERSION_C

mbedtls.mod/mbedtls/configs/config-thread.h

@@ -0,0 +1,87 @@
+/**
+ * \file config-thread.h
+ *
+ * \brief Minimal configuration for using TLS as part of Thread
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/*
+ * Minimal configuration for using TLS a part of Thread
+ * http://threadgroup.org/
+ *
+ * Distinguishing features:
+ * - no RSA or classic DH, fully based on ECC
+ * - no X.509
+ * - support for experimental EC J-PAKE key exchange
+ *
+ * See README.txt for usage instructions.
+ */
+
+/* System support */
+#define MBEDTLS_HAVE_ASM
+
+/* mbed TLS feature support */
+#define MBEDTLS_AES_ROM_TABLES
+#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
+#define MBEDTLS_ECP_NIST_OPTIM
+#define MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED
+#define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+#define MBEDTLS_SSL_PROTO_TLS1_2
+#define MBEDTLS_SSL_PROTO_DTLS
+#define MBEDTLS_SSL_DTLS_ANTI_REPLAY
+#define MBEDTLS_SSL_DTLS_HELLO_VERIFY
+
+/* mbed TLS modules */
+#define MBEDTLS_AES_C
+#define MBEDTLS_ASN1_PARSE_C
+#define MBEDTLS_ASN1_WRITE_C
+#define MBEDTLS_BIGNUM_C
+#define MBEDTLS_CCM_C
+#define MBEDTLS_CIPHER_C
+#define MBEDTLS_CTR_DRBG_C
+#define MBEDTLS_CMAC_C
+#define MBEDTLS_ECJPAKE_C
+#define MBEDTLS_ECP_C
+#define MBEDTLS_ENTROPY_C
+#define MBEDTLS_HMAC_DRBG_C
+#define MBEDTLS_MD_C
+#define MBEDTLS_OID_C
+#define MBEDTLS_PK_C
+#define MBEDTLS_PK_PARSE_C
+/* The library does not currently support enabling SHA-224 without SHA-256.
+ * A future version of the library will have this option disabled
+ * by default. */
+#define MBEDTLS_SHA224_C
+#define MBEDTLS_SHA256_C
+#define MBEDTLS_SSL_COOKIE_C
+#define MBEDTLS_SSL_CLI_C
+#define MBEDTLS_SSL_SRV_C
+#define MBEDTLS_SSL_TLS_C
+
+/* For tests using ssl-opt.sh */
+#define MBEDTLS_NET_C
+#define MBEDTLS_TIMING_C
+
+/* Save RAM at the expense of ROM */
+#define MBEDTLS_AES_ROM_TABLES
+
+/* Save RAM by adjusting to our exact needs */
+#define MBEDTLS_MPI_MAX_SIZE              32 // 256-bit EC curve = 32 bytes
+
+/* Save ROM and a few bytes of RAM by specifying our own ciphersuite list */
+#define MBEDTLS_SSL_CIPHERSUITES MBEDTLS_TLS_ECJPAKE_WITH_AES_128_CCM_8

mbedtls.mod/mbedtls/dco.txt

@@ -0,0 +1,37 @@
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+1 Letterman Drive
+Suite D4700
+San Francisco, CA, 94129
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.

mbedtls.mod/mbedtls/docs/.gitignore

@@ -0,0 +1,2 @@
+*.html
+*.pdf

mbedtls.mod/mbedtls/docs/3.0-migration-guide.md

@@ -0,0 +1,1011 @@
+# Migrating from Mbed TLS 2.x to Mbed TLS 3.0
+
+This guide details the steps required to migrate from Mbed TLS version 2.x to
+Mbed TLS version 3.0 or greater. Unlike normal releases, Mbed TLS 3.0 breaks
+compatibility with previous versions, so users (and alt implementors) might
+need to change their own code in order to make it work with Mbed TLS 3.0.
+
+Here's the list of breaking changes; each entry should help you answer these
+two questions: (1) am I affected? (2) if yes, what's my migration path?
+
+The changes are detailed below, and include:
+
+- Removal of many insecure or obsolete features
+- Tidying up of configuration options (including removing some less useful options).
+- Changing function signatures, e.g. adding return codes, adding extra parameters, or making some arguments const.
+- Removal of functions previously marked as deprecated.
+
+
+## General changes
+
+### Introduce a level of indirection and versioning in the config files
+
+`config.h` was split into `build_info.h` and `mbedtls_config.h`.
+
+* In code, use `#include <mbedtls/build_info.h>`. Don't include `mbedtls/config.h` and don't refer to `MBEDTLS_CONFIG_FILE`.
+* In build tools, edit `mbedtls_config.h`, or edit `MBEDTLS_CONFIG_FILE` as before.
+* If you had a tool that parsed the library version from `include/mbedtls/version.h`, this has moved to `include/mbedtls/build_info.h`. From C code, both headers now define the `MBEDTLS_VERSION_xxx` macros.
+
+Also, if you have a custom configuration file:
+
+* Don't include `check_config.h` or `config_psa.h` anymore.
+* Don't define `MBEDTLS_CONFIG_H` anymore.
+
+A config file version symbol, `MBEDTLS_CONFIG_VERSION` was introduced.
+Defining it to a particular value will ensure that Mbed TLS interprets
+the config file in a way that's compatible with the config file format
+used by the Mbed TLS release whose `MBEDTLS_VERSION_NUMBER` has the same
+value.
+The only value supported by Mbed TLS 3.0.0 is `0x03000000`.
+
+### Most structure fields are now private
+
+Direct access to fields of structures (`struct` types) declared in public headers is no longer supported. In Mbed TLS 3, the layout of structures is not considered part of the stable API, and minor versions (3.1, 3.2, etc.) may add, remove, rename, reorder or change the type of structure fields.
+
+There is a small number of exceptions where some fields are guaranteed to remain stable throughout the lifetime of Mbed TLS 3.x. These fields are explicitly documented as public. Please note that even if all the fields of a structure are public, future versions may add new fields. Also, as before, some public fields should be considered read-only, since modifying them may make the structure inconsistent; check the documentation in each case.
+
+Attempting to access a private field directly will result in a compilation error.
+
+If you were accessing structure fields directly, and these fields are not documented as public, you need to change your code. If an accessor (getter/setter) function exists, use that. Direct accessor functions are usually called `mbedtls_<MODULE>_{get,set}_<FIELD>` or `mbedtls_<MODULE>_<STRUCTURE>_{get,set}_<FIELD>`. Accessor functions that change the format may use different verbs, for example `read`/`write` for functions that import/export data from/to a text or byte string.
+
+If no accessor function exists, please open an [enhancement request against Mbed TLS](https://github.com/ARMmbed/mbedtls/issues/new?template=feature_request.md) and describe your use case. The Mbed TLS development team is aware that some useful accessor functions are missing in the 3.0 release, and we expect to add them to the first minor release(s) (3.1, etc.).
+
+As a last resort, you can access the field `foo` of a structure `bar` by writing `bar.MBEDTLS_PRIVATE(foo)`. Note that you do so at your own risk, since such code is likely to break in a future minor version of Mbed TLS.
+
+### Move part of timing module out of the library
+
+The change affects users who use any of the following functions:
+`mbedtls_timing_self_test()`, `mbedtls_hardclock_poll()`,
+`mbedtls_timing_hardclock()` and `mbedtls_set_alarm()`.
+
+If you were relying on these functions, you'll now need to change to using your
+platform's corresponding functions directly.
+
+### Deprecated net.h file was removed
+
+The file `include/mbedtls/net.h` was removed because its only function was to
+include `mbedtls/net_sockets.h` which now should be included directly.
+
+### Remove `MBEDTLS_CHECK_PARAMS` option
+
+This change does not affect users who use the default configuration; it only
+affects users who enabled that option.
+
+The option `MBEDTLS_CHECK_PARAMS` (disabled by default) enabled certain kinds
+of “parameter validation”. It covered two kinds of validations:
+
+- In some functions that require a valid pointer, “parameter validation” checks
+that the pointer is non-null. With the feature disabled, a null pointer is not
+treated differently from any other invalid pointer, and typically leads to a
+runtime crash. 90% of the uses of the feature are of this kind.
+- In some functions that take an enum-like argument, “parameter validation”
+checks that the value is a valid one. With the feature disabled, an invalid
+value causes a silent default to one of the valid values.
+
+The default reaction to a failed check was to call a function
+`mbedtls_param_failed()` which the application had to provide. If this function
+returned, its caller returned an error `MBEDTLS_ERR_xxx_BAD_INPUT_DATA`.
+
+This feature was only used in some classic (non-PSA) cryptography modules. It was
+not used in X.509, TLS or in PSA crypto, and it was not implemented in all
+classic crypto modules.
+
+This feature has been removed. The library no longer checks for NULL pointers;
+checks for enum-like arguments will be kept or re-introduced on a case-by-case
+basis, but their presence will no longer be dependent on a compile-time option.
+
+Validation of enum-like values is somewhat useful, but not extremely important,
+because the parameters concerned are usually constants in applications.
+
+For more information see issue #4313.
+
+### Remove the `MBEDTLS_TEST_NULL_ENTROPY` configuration option
+
+This does not affect users who use the default `mbedtls_config.h`, as this option was
+already off by default.
+
+If you were using the `MBEDTLS_TEST_NULL_ENTROPY` option and your platform
+doesn't have any entropy source, you should use `MBEDTLS_ENTROPY_NV_SEED`
+and make sure your device is provisioned with a strong random seed.
+Alternatively, for testing purposes only, you can create and register a fake
+entropy function.
+
+### Remove the HAVEGE module
+
+This doesn't affect people using the default configuration as it was already
+disabled by default.
+
+This only affects users who called the HAVEGE modules directly (not
+recommended), or users who used it through the entropy module but had it as the
+only source of entropy. If you're in that case, please declare OS or hardware
+RNG interfaces with `mbedtls_entropy_add_source()` and/or use an entropy seed
+file created securely during device provisioning. See
+<https://tls.mbed.org/kb/how-to/add-entropy-sources-to-entropy-pool> for more
+information.
+
+### Remove helpers for the transition from Mbed TLS 1.3 to Mbed TLS 2.0
+
+This only affects people who've been using Mbed TLS since before version 2.0
+and still relied on `compat-1.3.h` in their code.
+
+Please use the new names directly in your code; `scripts/rename.pl` (from any
+of the 2.x releases — no longer included in 3.0) might help you do that.
+
+
+## Low-level crypto
+
+Please also refer to the section [High-level crypto](#high-level-crypto) for
+changes that could sit in either category.
+
+### Deprecated functions were removed from bignum
+
+The function `mbedtls_mpi_is_prime()` was removed. Please use
+`mbedtls_mpi_is_prime_ext()` instead which additionally allows specifying the
+number of Miller-Rabin rounds.
+
+### Deprecated functions were removed from DRBGs
+
+The functions `mbedtls_ctr_drbg_update_ret()` and `mbedtls_hmac_drbg_update_ret()`
+were renamed to replace the corresponding functions without `_ret` appended. Please call
+the name without `_ret` appended and check the return value.
+
+### Deprecated hex-encoded primes were removed from DHM
+
+The macros `MBEDTLS_DHM_RFC5114_MODP_2048_P`, `MBEDTLS_DHM_RFC5114_MODP_2048_G`,
+`MBEDTLS_DHM_RFC3526_MODP_2048_P`, `MBEDTLS_DHM_RFC3526_MODP_2048_G`,
+`MBEDTLS_DHM_RFC3526_MODP_3072_P`, `MBEDTLS_DHM_RFC3526_MODP_3072_G`,
+`MBEDTLS_DHM_RFC3526_MODP_4096_P `and `MBEDTLS_DHM_RFC3526_MODP_4096_G` were
+removed. The primes from RFC 5114 are deprecated because their derivation is not
+documented and therefore their usage constitutes a security risk; they are fully
+removed from the library. Please use parameters from RFC3526 (still in the
+library, only in binary form) or RFC 7919 (also available in the library) or
+other trusted sources instead.
+
+### Deprecated functions were removed from hashing modules
+
+Modules: MD5, SHA1, SHA256, SHA512, MD.
+
+- The functions `mbedtls_xxx_starts_ret()`, `mbedtls_xxx_update_ret()`,
+  `mbedtls_xxx_finish_ret()` and `mbedtls_xxx_ret()` were renamed to replace
+  the corresponding functions without `_ret` appended. Please call the name without `_ret` appended and check the return value.
+- The function `mbedtls_md_init_ctx()` was removed; please use
+  `mbedtls_md_setup()` instead.
+- The functions `mbedtls_xxx_process()` were removed. You normally don't need
+  to call that from application code. However if you do (or if you want to
+  provide your own version of that function), please use
+  `mbedtls_internal_xxx_process()` instead, and check the return value.
+
+### Change `MBEDTLS_ECP_FIXED_POINT_OPTIM` behavior
+
+The option `MBEDTLS_ECP_FIXED_POINT_OPTIM` now increases code size and it does
+not increase peak RAM usage anymore.
+
+If you are limited by code size, you can define `MBEDTLS_ECP_FIXED_POINT_OPTIM`
+to `0` in your config file. The impact depends on the number and size of
+enabled curves. For example, for P-256 the difference is 1KB; see the documentation
+of this option for details.
+
+### Separated `MBEDTLS_SHA224_C` and `MBEDTLS_SHA256_C`
+
+This does not affect users who use the default `mbedtls_config.h`. `MBEDTLS_SHA256_C`
+was enabled by default. Now both `MBEDTLS_SHA256_C` and `MBEDTLS_SHA224_C` are
+enabled.
+
+If you were using custom config file with `MBEDTLS_SHA256_C` enabled, then
+you will need to add `#define MBEDTLS_SHA224_C` option to your config.
+Current version of the library does not support enabling `MBEDTLS_SHA256_C`
+without `MBEDTLS_SHA224_C`.
+
+### Replaced `MBEDTLS_SHA512_NO_SHA384` with `MBEDTLS_SHA384_C`
+
+This does not affect users who use the default `mbedtls_config.h`.
+`MBEDTLS_SHA512_NO_SHA384` was disabled by default, now `MBEDTLS_SHA384_C` is
+enabled by default.
+
+If you were using a config file with both `MBEDTLS_SHA512_C` and
+MBEDTLS_SHA512_NO_SHA384, then just remove the `MBEDTLS_SHA512_NO_SHA384`.
+If you were using a config file with `MBEDTLS_SHA512_C` and without
+`MBEDTLS_SHA512_NO_SHA384` and you need the SHA-384 algorithm, then add
+`#define MBEDTLS_SHA384_C` to your config file.
+
+### GCM multipart interface: application changes
+
+The GCM module now supports arbitrary chunked input in the multipart interface.
+This changes the interface for applications using the GCM module directly for multipart operations.
+Applications using one-shot GCM or using GCM via the `mbedtls_cipher_xxx` or `psa_aead_xxx` interfaces do not require any changes.
+
+* `mbedtls_gcm_starts()` now only sets the mode and the nonce (IV). Call the new function `mbedtls_gcm_update_ad()` to pass the associated data.
+* `mbedtls_gcm_update()` now takes an extra parameter to indicate the actual output length. In Mbed TLS 2.x, applications had to pass inputs consisting of whole 16-byte blocks except for the last block (this limitation has been lifted). In this case:
+    * As long as the input remains block-aligned, the output length is exactly the input length, as before.
+    * If the length of the last input is not a multiple of 16, alternative implementations may return the last partial block in the call to `mbedtls_gcm_finish()` instead of returning it in the last call to `mbedtls_gcm_update()`.
+* `mbedtls_gcm_finish()` now takes an extra output buffer for the last partial block. This is needed for alternative implementations that can only process a whole block at a time.
+
+### GCM interface changes: impact for alternative implementations
+
+The GCM multipart interface has changed as described in [“GCM multipart interface: application changes”](#gcm-multipart-interface-application-changes). The consequences for an alternative implementation of GCM (`MBEDTLS_GCM_ALT`) are as follows:
+
+* `mbedtls_gcm_starts()` now only sets the mode and the nonce (IV). The new function `mbedtls_gcm_update_ad()` receives the associated data. It may be called multiple times.
+* `mbedtls_gcm_update()` now allows arbitrary-length inputs, takes an extra parameter to indicate the actual output length. Alternative implementations may choose between two modes:
+    * Always return the partial output immediately, even if it does not consist of a whole number of blocks.
+    * Buffer the data for the last partial block, to be returned in the next call to `mbedtls_gcm_update()` or `mbedtls_gcm_finish()`.
+* `mbedtls_gcm_finish()` now takes an extra output buffer for the last partial block if needed.
+
+### The configuration option `MBEDTLS_ECP_NO_INTERNAL_RNG` was removed
+
+This doesn't affect users of the default configuration; it only affects people
+who were explicitly setting this option.
+
+This was a trade-off between code size and countermeasures; it is no longer
+relevant as the countermeasure is now always on at no cost in code size.
+
+### SHA-512 and SHA-256 output type change
+
+The output parameter of `mbedtls_sha256_finish()`, `mbedtls_sha256()`, `mbedtls_sha512_finish()`, `mbedtls_sha512()` now has a pointer type rather than array type. This makes no difference in terms of C semantics, but removes spurious warnings in some compilers when outputting a SHA-384 hash into a 48-byte buffer or a SHA-224 hash into a 28-byte buffer.
+
+This makes no difference to a vast majority of applications. If your code takes a pointer to one of these functions, you may need to change the type of the pointer.
+
+Alternative implementations of the SHA256 and SHA512 modules must adjust their functions' prototype accordingly.
+
+### Deprecated error codes for hardware failures were removed
+
+- The macros `MBEDTLS_ERR_xxx_FEATURE_UNSUPPORTED` from various crypto modules
+  were removed; `MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED` is now used
+  instead.
+- The macros `MBEDTLS_ERR_xxx_HW_ACCEL_FAILED` from various crypto modules
+  were removed; `MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED` is now used instead.
+
+### Remove the mode parameter from RSA functions
+
+This affects all users who use the RSA encryption, decryption, sign and
+verify APIs.
+
+The RSA module no longer supports private-key operations with the public key or
+vice versa. As a consequence, RSA operation functions no longer have a mode
+parameter. If you were calling RSA operations with the normal mode (public key
+for verification or encryption, private key for signature or decryption), remove
+the `MBEDTLS_MODE_PUBLIC` or `MBEDTLS_MODE_PRIVATE` argument. If you were calling
+RSA operations with the wrong mode, which rarely makes sense from a security
+perspective, this is no longer supported.
+
+### Deprecated functions were removed from AES
+
+The functions `mbedtls_aes_encrypt()` and `mbedtls_aes_decrypt()` were
+removed.
+
+If you're simply using the AES module, you should be calling the higher-level
+functions `mbedtls_aes_crypt_xxx()`.
+
+If you're providing an alternative implementation using
+`MBEDTLS_AES_ENCRYPT_ALT` or `MBEDTLS_AES_DECRYPT_ALT`, you should be
+replacing the removed functions with `mbedtls_internal_aes_encrypt()` and
+`mbedtls_internal_aes_decrypt()` respectively.
+
+### Deprecated functions were removed from ECDSA
+
+The functions `mbedtls_ecdsa_write_signature_det()` and
+`mbedtls_ecdsa_sign_det()` were removed. They were superseded by
+`mbedtls_ecdsa_write_signature()` and `mbedtls_ecdsa_sign_det_ext()`
+respectively.
+
+### Rename `mbedtls_*_ret()` cryptography functions whose deprecated variants have been removed
+
+This change affects users who were using the `mbedtls_*_ret()` cryptography
+functions.
+
+Those functions were created based on now-deprecated functions according to a
+requirement that a function needs to return a value. This change brings back the
+original names of those functions. The renamed functions are:
+
+| name before this change        | after the change           |
+|--------------------------------|----------------------------|
+| `mbedtls_ctr_drbg_update_ret`  | `mbedtls_ctr_drbg_update`  |
+| `mbedtls_hmac_drbg_update_ret` | `mbedtls_hmac_drbg_update` |
+| `mbedtls_md5_starts_ret`       | `mbedtls_md5_starts`       |
+| `mbedtls_md5_update_ret`       | `mbedtls_md5_update`       |
+| `mbedtls_md5_finish_ret`       | `mbedtls_md5_finish`       |
+| `mbedtls_md5_ret`              | `mbedtls_md5`              |
+| `mbedtls_ripemd160_starts_ret` | `mbedtls_ripemd160_starts` |
+| `mbedtls_ripemd160_update_ret` | `mbedtls_ripemd160_update` |
+| `mbedtls_ripemd160_finish_ret` | `mbedtls_ripemd160_finish` |
+| `mbedtls_ripemd160_ret`        | `mbedtls_ripemd160`        |
+| `mbedtls_sha1_starts_ret`      | `mbedtls_sha1_starts`      |
+| `mbedtls_sha1_update_ret`      | `mbedtls_sha1_update`      |
+| `mbedtls_sha1_finish_ret`      | `mbedtls_sha1_finish`      |
+| `mbedtls_sha1_ret`             | `mbedtls_sha1`             |
+| `mbedtls_sha256_starts_ret`    | `mbedtls_sha256_starts`    |
+| `mbedtls_sha256_update_ret`    | `mbedtls_sha256_update`    |
+| `mbedtls_sha256_finish_ret`    | `mbedtls_sha256_finish`    |
+| `mbedtls_sha256_ret`           | `mbedtls_sha256`           |
+| `mbedtls_sha512_starts_ret`    | `mbedtls_sha512_starts`    |
+| `mbedtls_sha512_update_ret`    | `mbedtls_sha512_update`    |
+| `mbedtls_sha512_finish_ret`    | `mbedtls_sha512_finish`    |
+| `mbedtls_sha512_ret`           | `mbedtls_sha512`           |
+
+To migrate to the this change the user can keep the `*_ret` names in their code
+and include the `compat_2.x.h` header file which holds macros with proper
+renaming or to rename those functions in their code according to the list from
+mentioned header file.
+
+### Remove the RNG parameter from RSA verify functions
+
+RSA verification functions also no longer take random generator arguments (this
+was only needed when using a private key). This affects all applications using
+the RSA verify functions.
+
+### Remove the padding parameters from `mbedtls_rsa_init()`
+
+This affects all users who use the RSA encryption, decryption, sign and
+verify APIs.
+
+The function `mbedtls_rsa_init()` no longer supports selecting the PKCS#1 v2.1
+encoding and its hash. It just selects the PKCS#1 v1.5 encoding by default. If
+you were using the PKCS#1 v2.1 encoding you now need, subsequently to the call
+to `mbedtls_rsa_init()`, to call `mbedtls_rsa_set_padding()` to set it.
+
+To choose the padding type when initializing a context, instead of
+
+```C
+    mbedtls_rsa_init(ctx, padding, hash_id);
+```
+
+use
+
+```C
+    mbedtls_rsa_init(ctx);
+    mbedtls_rsa_set_padding(ctx, padding, hash_id);
+```
+
+To use PKCS#1 v1.5 padding, instead of
+
+```C
+    mbedtls_rsa_init(ctx, MBEDTLS_RSA_PKCS_V15, <ignored>);
+```
+
+just use
+
+```C
+    mbedtls_rsa_init(ctx);
+```
+
+
+## High-level crypto
+
+Please also refer to the section [Low-level crypto](#low-level-crypto) for
+changes that could sit in either category.
+
+### Calling `mbedtls_cipher_finish()` is mandatory for all multi-part operations
+
+This only affects people who use the cipher module to perform AEAD operations
+using the multi-part API.
+
+Previously, the documentation didn't state explicitly if it was OK to call
+`mbedtls_cipher_check_tag()` or `mbedtls_cipher_write_tag()` directly after
+the last call to `mbedtls_cipher_update()` — that is, without calling
+`mbedtls_cipher_finish()` in-between. If you code was missing that call,
+please add it and be prepared to get as much as 15 bytes of output.
+
+Currently the output is always 0 bytes, but it may be more when alternative
+implementations of the underlying primitives are in use, or with future
+versions of the library.
+
+### Remove MD2, MD4, RC4, Blowfish and XTEA algorithms
+
+This change affects users of the MD2, MD4, RC4, Blowfish and XTEA algorithms.
+
+They are already niche or obsolete and most of them are weak or broken. For
+those reasons possible users should consider switching to modern and safe
+alternatives to be found in literature.
+
+### Deprecated functions were removed from cipher
+
+The functions `mbedtls_cipher_auth_encrypt()` and
+`mbedtls_cipher_auth_decrypt()` were removed. They were superseded by
+`mbedtls_cipher_auth_encrypt_ext()` and `mbedtls_cipher_auth_decrypt_ext()`
+respectively which additionally support key wrapping algorithms such as
+NIST_KW.
+
+### Extra parameter for the output buffer size
+
+The following functions now take an extra parameter indicating the size of the output buffer:
+
+* `mbedtls_ecdsa_write_signature()`, `mbedtls_ecdsa_write_signature_restartable()`
+* `mbedtls_pk_sign()`, `mbedtls_pk_sign_restartable()`
+
+The requirements for the output buffer have not changed, but passing a buffer that is too small now reliably causes the functions to return an error, rather than overflowing the buffer.
+
+### Signature functions now require the hash length to match the expected value
+
+This affects users of the PK API as well as users of the low-level API in the RSA module. Users of the PSA API or of the ECDSA module are unaffected.
+
+All the functions in the RSA module that accept a `hashlen` parameter used to
+ignore it unless the `md_alg` parameter was `MBEDTLS_MD_NONE`, indicating raw
+data was signed. The `hashlen` parameter is now always the size that is read
+from the `hash` input buffer. This length must be equal to the output size of
+the hash algorithm used when signing a hash. (The requirements when signing
+raw data are unchanged.) This affects the following functions:
+
+* `mbedtls_rsa_pkcs1_sign`, `mbedtls_rsa_pkcs1_verify`
+* `mbedtls_rsa_rsassa_pkcs1_v15_sign`, `mbedtls_rsa_rsassa_pkcs1_v15_verify`
+* `mbedtls_rsa_rsassa_pss_sign`, `mbedtls_rsa_rsassa_pss_verify`
+* `mbedtls_rsa_rsassa_pss_sign_ext`, `mbedtls_rsa_rsassa_pss_verify_ext`
+
+The signature functions in the PK module no longer accept 0 as the `hash_len` parameter. The `hash_len` parameter is now always the size that is read from the `hash` input buffer. This affects the following functions:
+
+* `mbedtls_pk_sign`, `mbedtls_pk_verify`
+* `mbedtls_pk_sign_restartable`, `mbedtls_pk_verify_restartable`
+* `mbedtls_pk_verify_ext`
+
+The migration path is to pass the correct value to those functions.
+
+### Some function parameters were made const
+
+Various functions in the PK and ASN.1 modules had a `const` qualifier added to
+some of their parameters.
+
+This normally doesn't affect your code, unless you use pointers to reference
+those functions. In this case, you'll need to update the type of your pointers
+in order to match the new signature.
+
+### The RNG parameter is now mandatory for all functions that accept one
+
+This change affects all users who called a function accepting a `f_rng`
+parameter with `NULL` as the value of this argument; this is no longer
+supported.
+
+The changed functions are: the X.509 CRT and CSR writing functions; the PK and
+RSA sign and decrypt functions; `mbedtls_rsa_private()`; the functions in DHM
+and ECDH that compute the shared secret; the scalar multiplication functions in
+ECP.
+
+You now need to pass a properly seeded, cryptographically secure RNG to all
+functions that accept a `f_rng` parameter. It is of course still possible to
+pass `NULL` as the context pointer `p_rng` if your RNG function doesn't need a
+context.
+
+Alternative implementations of a module (enabled with the `MBEDTLS_module_ALT`
+configuration options) may have their own internal and are free to ignore the
+`f_rng` argument but must allow users to pass one anyway.
+
+### Some functions gained an RNG parameter
+
+This affects users of the following functions: `mbedtls_ecp_check_pub_priv()`,
+`mbedtls_pk_check_pair()`, `mbedtls_pk_parse_key()`, and
+`mbedtls_pk_parse_keyfile()`.
+
+You now need to pass a properly seeded, cryptographically secure RNG when
+calling these functions. It is used for blinding, a countermeasure against
+side-channel attacks.
+
+
+## PSA
+
+### Deprecated names for PSA constants and types were removed
+
+Some constants and types that were present in beta versions of the PSA Crypto
+API were removed from version 1.0 of specification. Please switch to the new
+names provided by the 1.0 specification instead.
+
+
+## Changes that only affect alternative implementations
+
+### Internal / alt-focused headers were moved to a private location
+
+This shouldn't affect users who took care not to include headers that
+were documented as internal, despite being in the public include directory.
+
+If you're providing alt implementations of ECP or RSA, you'll need to add our
+`library` directory to your include path when building your alt
+implementations, and note that `ecp_internal.h` and `rsa_internal.h` have been
+renamed to `ecp_internal_alt.h` and `rsa_alt_helpers.h` respectively.
+
+If you're a library user and used to rely on having access to a structure or
+function that's now in a private header, please reach out on the mailing list
+and explain your need; we'll consider adding a new API in a future version.
+
+### CCM interface changes: impact for alternative implementations
+
+The CCM interface has changed with the addition of support for
+multi-part operations. Five new API functions have been defined:
+ `mbedtls_ccm_starts()`, `mbedtls_ccm_set_lengths()`,
+ `mbedtls_ccm_update_ad()`, `mbedtls_ccm_update()` and `mbedtls_ccm_finish()`.
+Alternative implementations of CCM (`MBEDTLS_CCM_ALT`) have now to
+implement those additional five API functions.
+
+
+## X.509
+
+### Remove the certs module from the library
+
+This should not affect production use of the library, as the certificates and
+keys included there were never suitable for production use.
+
+However it might affect you if you relied on them for testing purposes. In
+that case, please embed your own test certificates in your test code; now that
+`certs.c` is out of the library there is no longer any stability guaranteed
+and it may change in incompatible ways at any time.
+
+### Change the API to allow adding critical extensions to CSRs
+
+This affects applications that call the `mbedtls_x509write_csr_set_extension`
+function.
+
+The API is changed to include the parameter `critical` which enables marking an
+extension included in a CSR as critical. To get the previous behavior pass 0.
+
+### Remove the config option `MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION`
+
+This change does not affect users of the default configuration; it only affects
+users who enable this option.
+
+The X.509 standard says that implementations must reject critical extensions that
+they don't recognize, and this is what Mbed TLS does by default. This option
+allowed to continue parsing those certificates but didn't provide a convenient
+way to handle those extensions.
+
+The migration path from that option is to use the
+`mbedtls_x509_crt_parse_der_with_ext_cb()` function which is functionally
+equivalent to `mbedtls_x509_crt_parse_der()`, and/or
+`mbedtls_x509_crt_parse_der_nocopy()` but it calls the callback with every
+unsupported certificate extension and additionally the "certificate policies"
+extension if it contains any unsupported certificate policies.
+
+### Remove `MBEDTLS_X509_CHECK_*_KEY_USAGE` options from `mbedtls_config.h`
+
+This change affects users who have chosen the configuration options to disable the
+library's verification of the `keyUsage` and `extendedKeyUsage` fields of x509
+certificates.
+
+The `MBEDTLS_X509_CHECK_KEY_USAGE` and `MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE`
+configuration options are removed and the X509 code now behaves as if they were
+always enabled. It is consequently not possible anymore to disable at compile
+time the verification of the `keyUsage` and `extendedKeyUsage` fields of X509
+certificates.
+
+The verification of the `keyUsage` and `extendedKeyUsage` fields is important,
+disabling it can cause security issues and it is thus not recommended. If the
+verification is for some reason undesirable, it can still be disabled by means
+of the verification callback function passed to `mbedtls_x509_crt_verify()` (see
+the documentation of this function for more information).
+
+### Remove the `MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3` option
+
+This change does not affect users who were using the default configuration, as
+this option was already disabled by default. Also, it does not affect users who
+are working with current V3 X.509 certificates.
+
+Extensions were added in V3 of the X.509 specification, so pre-V3 certificates
+containing extensions were never compliant. Mbed TLS now rejects them with a
+parsing error in all configurations, as it did previously in the default
+configuration.
+
+If you are working with the pre-V3 certificates you need to switch to the
+current ones.
+
+### Strengthen default algorithm selection for X.509
+
+This is described in the section [Strengthen default algorithm selection for X.509 and TLS](#strengthen-default-algorithm-selection-for-x.509-and-tls).
+
+### Remove wrapper for libpkcs11-helper
+
+This doesn't affect people using the default configuration as it was already
+disabled by default.
+
+If you used to rely on this module in order to store your private keys
+securely, please have a look at the key management facilities provided by the
+PSA crypto API. If you have a use case that's not covered yet by this API,
+please reach out on the mailing list.
+
+
+## SSL
+
+### Remove support for TLS 1.0, 1.1 and DTLS 1.0
+
+This change affects users of the TLS 1.0, 1.1 and DTLS 1.0 protocols.
+
+These versions have been deprecated by RFC 8996.
+Keeping them in the library creates opportunities for misconfiguration
+and possibly downgrade attacks. More generally, more code means a larger attack
+surface, even if the code is supposedly not used.
+
+The migration path is to adopt the latest versions of the protocol.
+
+As a consequence of removing TLS 1.0, support for CBC record splitting was
+also removed, as it was a work-around for a weakness in this particular
+version. There is no migration path since the feature is no longer relevant.
+
+As a consequence of currently supporting only one version of (D)TLS (and in the
+future 1.3 which will have a different version negotiation mechanism), support
+for fallback SCSV (RFC 7507) was also removed. There is no migration path as
+it's no longer useful with TLS 1.2 and later.
+
+As a consequence of currently supporting only one version of (D)TLS (and in the
+future 1.3 which will have a different concept of ciphersuites), support for
+configuring ciphersuites separately for each version via
+`mbedtls_ssl_conf_ciphersuites_for_version()` was removed. Use
+`mbedtls_ssl_conf_ciphersuites()` to configure ciphersuites to use with (D)TLS
+1.2; in the future a different API will be added for (D)TLS 1.3.
+
+### Remove support for SSL 3.0
+
+This doesn't affect people using the default configuration as it was already
+disabled by default.
+
+This only affects TLS users who explicitly enabled `MBEDTLS_SSL_PROTO_SSL3`
+and relied on that version in order to communicate with peers that are not up
+to date. If one of your peers is in that case, please try contacting them and
+encouraging them to upgrade their software.
+
+### Remove support for parsing SSLv2 ClientHello
+
+This doesn't affect people using the default configuration as it was already
+disabled by default.
+
+This only affects TLS servers that have clients who send an SSLv2 ClientHello.
+These days clients are very unlikely to do that. If you have a client that
+does, please try contacting them and encouraging them to upgrade their
+software.
+
+### Remove support for truncated HMAC
+
+This affects users of truncated HMAC, that is, users who called
+`mbedtls_ssl_conf_truncated_hmac( ..., MBEDTLS_SSL_TRUNC_HMAC_ENABLED)`,
+regardless of whether the standard version was used or compatibility version
+(`MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT`).
+
+The recommended migration path for people who want minimal overhead is to use a
+CCM-8 ciphersuite.
+
+### Remove support for TLS record-level compression
+
+This doesn't affect people using the default configuration as it was already
+disabled by default.
+
+This only affects TLS users who enabled `MBEDTLS_ZLIB_SUPPORT`. This will not
+cause any failures however if you used to enable TLS record-level compression
+you may find that your bandwidth usage increases without compression. There's
+no general solution to this problem; application protocols might have their
+own compression mechanisms and are in a better position than the TLS stack to
+avoid variants of the CRIME and BREACH attacks.
+
+### Remove support for TLS RC4-based ciphersuites
+
+This does not affect people who used the default `mbedtls_config.h` and the default
+list of ciphersuites, as RC4-based ciphersuites were already not negotiated in
+that case.
+
+Please switch to any of the modern, recommended ciphersuites (based on
+AES-GCM, AES-CCM or ChachaPoly for example) and if your peer doesn't support
+any, encourage them to upgrade their software.
+
+### Remove support for TLS single-DES ciphersuites
+
+This doesn't affect people using the default configuration as it was already
+disabled by default.
+
+Please switch to any of the modern, recommended ciphersuites (based on
+AES-GCM, AES-CCM or ChachaPoly for example) and if your peer doesn't support
+any, encourage them to upgrade their software.
+
+### Remove support for TLS record-level hardware acceleration
+
+This doesn't affect people using the default configuration as it was already
+disabled by default.
+
+This feature had been broken for a while so we doubt anyone still used it.
+However if you did, please reach out on the mailing list and let us know about
+your use case.
+
+### Remove config option `MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME`
+
+This doesn't affect people using the default configuration.
+
+This option has not had any effect for a long time. Please use the `lifetime`
+parameter of `mbedtls_ssl_ticket_setup()` instead.
+
+### Combine the `MBEDTLS_SSL_CID_PADDING_GRANULARITY` and `MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY` options
+
+This change affects users who modified the default `mbedtls_config.h` padding granularity
+settings, i.e. enabled at least one of the options.
+
+The `mbedtls_config.h` options `MBEDTLS_SSL_CID_PADDING_GRANULARITY` and
+`MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY` were combined into one option because
+they used exactly the same padding mechanism and hence their respective padding
+granularities can be used in exactly the same way. This change simplifies the
+code maintenance.
+
+The new single option `MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY` can be used
+for both DTLS-CID and TLS 1.3.
+
+### TLS now favors faster curves over larger curves
+
+The default preference order for curves in TLS now favors resource usage (performance and memory consumption) over size. The exact order is unspecified and may change, but generally you can expect 256-bit curves to be preferred over larger curves.
+
+If you prefer a different order, call `mbedtls_ssl_conf_curves()` when configuring a TLS connection.
+
+### SSL key export interface change
+
+This affects users of the SSL key export APIs:
+```
+    mbedtls_ssl_conf_export_keys_cb()
+    mbedtls_ssl_conf_export_keys_ext_cb()
+```
+
+Those APIs have been removed and replaced by the new API
+`mbedtls_ssl_set_export_keys_cb()`. This API differs from
+the previous key export API in the following ways:
+
+- It is no longer bound to an SSL configuration, but to an
+  SSL context. This allows users to more easily identify the
+  connection an exported key belongs to.
+- It no longer exports raw keys and IV.
+- A secret type parameter has been added to identify which key
+  is being exported. For TLS 1.2, only the master secret is
+  exported, but upcoming TLS 1.3 support will add other kinds of keys.
+- The callback now specifies a void return type, rather than
+  returning an error code. It is the responsibility of the application
+  to handle failures in the key export callback, for example by
+  shutting down the TLS connection.
+
+For users which do not rely on raw keys and IV, adjusting to the new
+callback type should be straightforward — see the example programs
+`programs/ssl/ssl_client2` and `programs/ssl/ssl_server2` for callbacks
+for NSSKeylog, EAP-TLS and DTLS-SRTP.
+
+Users which require access to the raw keys used to secure application
+traffic may derive those by hand based on the master secret and the
+handshake transcript hashes which can be obtained from the raw data
+on the wire. Such users are also encouraged to reach out to the
+Mbed TLS team on the mailing list, to let the team know about their
+use case.
+
+### Remove MaximumFragmentLength (MFL) query API
+
+This affects users which use the MFL query APIs
+`mbedtls_ssl_get_{input,output}_max_frag_len()` to
+infer upper bounds on the plaintext size of incoming and
+outgoing record.
+
+Users should switch to `mbedtls_ssl_get_max_{in,out}_record_payload()`
+instead, which also provides such upper bounds but takes more factors
+than just the MFL configuration into account.
+
+### Relaxed semantics for PSK configuration
+
+This affects users which call the PSK configuration APIs
+`mbedtlsl_ssl_conf_psk()` and `mbedtls_ssl_conf_psk_opaque()`
+multiple times on the same SSL configuration.
+
+In Mbed TLS 2.x, users would observe later calls overwriting
+the effect of earlier calls, with the prevailing PSK being
+the one that has been configured last. In Mbed TLS 3.0,
+calling `mbedtls_ssl_conf_[opaque_]psk()` multiple times
+will return an error, leaving the first PSK intact.
+
+To achieve equivalent functionality when migrating to Mbed TLS 3.0,
+users calling `mbedtls_ssl_conf_[opaque_]psk()` multiple times should
+remove all but the last call, so that only one call to _either_
+`mbedtls_ssl_conf_psk()` _or_ `mbedtls_ssl_conf_psk_opaque()`
+remains.
+
+### Remove the configuration to enable weak ciphersuites in SSL / TLS
+
+This does not affect users who use the default `mbedtls_config.h`, as this option was
+already off by default.
+
+If you were using a weak cipher, please switch to any of the modern,
+recommended ciphersuites (based on AES-GCM, AES-CCM or ChachaPoly for example)
+and if your peer doesn't support any, encourage them to upgrade their software.
+
+If you were using a ciphersuite without encryption, you just have to
+enable `MBEDTLS_CIPHER_NULL_CIPHER` now.
+
+### Remove the `MBEDTLS_SSL_MAX_CONTENT_LEN` configuration option
+
+This affects users who use the `MBEDTLS_SSL_MAX_CONTENT_LEN` option to
+set the maximum length of incoming and outgoing plaintext fragments,
+which can save memory by reducing the size of the TLS I/O buffers.
+
+This option is replaced by the more fine-grained options
+`MBEDTLS_SSL_IN_CONTENT_LEN` and `MBEDTLS_SSL_OUT_CONTENT_LEN` that set
+the maximum incoming and outgoing plaintext fragment lengths, respectively.
+
+### Remove the SSL API `mbedtls_ssl_get_session_pointer()`
+
+This affects two classes of users:
+
+1. Users who manually inspect parts of the current session through
+   direct structure field access.
+
+2. Users of session resumption who query the current session
+   via `mbedtls_ssl_get_session_pointer()` prior to saving or exporting
+   it via `mbedtls_ssl_session_copy()` or `mbedtls_ssl_session_save()`,
+   respectively.
+
+Migration paths:
+
+1. Mbed TLS 3.0 does not offer a migration path for the use case 1: Like many
+   other Mbed TLS structures, the structure of `mbedtls_ssl_session` is no
+   longer part of the public API in Mbed TLS 3.0, and direct structure field
+   access is no longer supported. Please see the [section on private structure fields](#most-structure-fields-are-now-private) for more details.
+
+2. Users should replace calls to `mbedtls_ssl_get_session_pointer()` by
+   calls to `mbedtls_ssl_get_session()` as demonstrated in the example
+   program `programs/ssl/ssl_client2.c`.
+
+### Remove `MBEDTLS_SSL_DTLS_BADMAC_LIMIT` option
+
+This change does not affect users who used the default `mbedtls_config.h`, as the option
+`MBEDTLS_SSL_DTLS_BADMAC_LIMIT` was already on by default.
+
+This option was a trade-off between functionality and code size: it allowed
+users who didn't need that feature to avoid paying the cost in code size, by
+disabling it.
+
+This option is no longer present, but its functionality is now always enabled.
+
+### Deprecated functions were removed from SSL
+
+The function `mbedtls_ssl_conf_dh_param()` was removed. Please use
+`mbedtls_ssl_conf_dh_param_bin()` or `mbedtls_ssl_conf_dh_param_ctx()` instead.
+
+The function `mbedtls_ssl_get_max_frag_len()` was removed. Please use
+`mbedtls_ssl_get_max_out_record_payload()` and
+`mbedtls_ssl_get_max_in_record_payload()`
+instead.
+
+### Remove `MBEDTLS_SSL_RECORD_CHECKING` option and enable its action by default
+
+This change does not affect users who use the default `mbedtls_config.h`, as the
+option `MBEDTLS_SSL_RECORD_CHECKING` was already on by default.
+
+This option was added only to control compilation of one function,
+ `mbedtls_ssl_check_record()`, which is only useful in some specific cases, so it
+was made optional to allow users who don't need it to save some code space.
+However, the same effect can be achieved by using link-time garbage collection.
+
+Users who changed the default setting of the option need to change the config/
+build system to remove that change.
+
+### Session Cache API Change
+
+This affects users who use `mbedtls_ssl_conf_session_cache()`
+to configure a custom session cache implementation different
+from the one Mbed TLS implements in `library/ssl_cache.c`.
+
+Those users will need to modify the API of their session cache
+implementation to that of a key-value store with keys being
+session IDs and values being instances of `mbedtls_ssl_session`:
+
+```C
+typedef int mbedtls_ssl_cache_get_t( void *data,
+                                     unsigned char const *session_id,
+                                     size_t session_id_len,
+                                     mbedtls_ssl_session *session );
+typedef int mbedtls_ssl_cache_set_t( void *data,
+                                     unsigned char const *session_id,
+                                     size_t session_id_len,
+                                     const mbedtls_ssl_session *session );
+```
+
+Since the structure of `mbedtls_ssl_session` is no longer public from 3.0
+onwards, portable session cache implementations must not access fields of
+`mbedtls_ssl_session`. See the corresponding migration guide. Users that
+find themselves unable to migrate their session cache functionality without
+accessing fields of `mbedtls_ssl_session` should describe their use case
+on the Mbed TLS mailing list.
+
+### Changes in the SSL error code space
+
+This affects users manually checking for the following error codes:
+
+- `MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED`
+- `MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH`
+- `MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE`
+- `MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN`
+- `MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE`
+- `MBEDTLS_ERR_SSL_BAD_HS_XXX`
+
+Migration paths:
+- `MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE` has been removed, and
+  `MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL` is returned instead if the user's own certificate
+  is too large to fit into the output buffers.
+  
+  Users should check for `MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL` instead, and potentially
+  compare the size of their own certificate against the configured size of the output buffer to
+  understand if the error is due to an overly large certificate.
+
+- `MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN` and `MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE` have been
+  replaced by `MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE`.
+
+- All codes of the form `MBEDTLS_ERR_SSL_BAD_HS_XXX` have been replaced by various alternatives, which give more information about the type of error raised.
+
+  Users should check for the newly introduced generic error codes
+
+  * `MBEDTLS_ERR_SSL_DECODE_ERROR`
+  * `MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER`,
+  * `MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE`
+  * `MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION`
+  * `MBEDTLS_ERR_SSL_BAD_CERTIFICATE`
+  * `MBEDTLS_ERR_SSL_UNRECOGNIZED_NAME`
+  * `MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION`
+  * `MBEDTLS_ERR_SSL_NO_APPLICATION_PROTOCOL`
+
+  and the pre-existing generic error codes
+
+  * `MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE`
+  * `MBEDTLS_ERR_SSL_INTERNAL_ERROR`
+
+  instead.
+
+### Modified semantics of `mbedtls_ssl_{get,set}_session()`
+
+This affects users who call `mbedtls_ssl_get_session()` or
+`mbedtls_ssl_set_session()` multiple times on the same SSL context
+representing an established TLS 1.2 connection.
+Those users will now observe the second call to fail with
+`MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE`.
+
+Migration path:
+- Exporting the same TLS 1.2 connection multiple times via
+  `mbedtls_ssl_get_session()` leads to multiple copies of
+  the same session. This use of `mbedtls_ssl_get_session()`
+  is discouraged, and the following should be considered:
+  * If the various session copies are later loaded into
+    fresh SSL contexts via `mbedtls_ssl_set_session()`,
+    export via `mbedtls_ssl_get_session()` only once and
+    load the same session into different contexts via
+    `mbedtls_ssl_set_session()`. Since `mbedtls_ssl_set_session()`
+    makes a copy of the session that's being loaded, this
+    is functionally equivalent.
+  * If the various session copies are later serialized
+    via `mbedtls_ssl_session_save()`, export and serialize
+    the session only once via `mbedtls_ssl_get_session()` and
+    `mbedtls_ssl_session_save()` and make copies of the raw
+    data instead.
+- Calling `mbedtls_ssl_set_session()` multiple times in Mbed TLS 2.x
+  is not useful since subsequent calls overwrite the effect of previous
+  calls. Applications achieve equivalent functional behavior by
+  issuing only the very last call to `mbedtls_ssl_set_session()`.
+
+### Turn `MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE` configuration option into a runtime option
+
+This change affects users who were enabling `MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE`
+option in the `mbedtls_config.h`
+
+This option has been removed and a new function with similar functionality has
+been introduced into the SSL API.
+
+This new function `mbedtls_ssl_conf_preference_order()` can be used to
+change the preferred order of ciphersuites on the server to those used on the client,
+e.g.: `mbedtls_ssl_conf_preference_order(ssl_config, MBEDTLS_SSL_SRV_CIPHERSUITE_ORDER_CLIENT)`
+has the same effect as enabling the removed option. The default state is to use
+the server order of suites.
+
+### Strengthen default algorithm selection for X.509 and TLS
+
+The default X.509 verification profile (`mbedtls_x509_crt_profile_default`) and the default curve and hash selection in TLS have changed. They are now aligned, except that the X.509 profile only lists curves that support signature verification.
+
+Hashes and curves weaker than 255 bits (security strength less than 128 bits) are no longer accepted by default. The following hashes have been removed: SHA-1 (formerly only accepted for key exchanges but not for certificate signatures), SHA-224 (weaker hashes were already not accepted). The following curves have been removed: secp192r1, secp224r1, secp192k1, secp224k1.
+
+The compile-time options `MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES` and `MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE` are no longer available.
+
+The curve secp256k1 has also been removed from the default X.509 and TLS profiles. [RFC 8422](https://datatracker.ietf.org/doc/html/rfc8422#section-5.1.1) deprecates it in TLS, and it is very rarely used, although it is not known to be weak at the time of writing.
+
+If you still need to accept certificates signed with algorithms that have been removed from the default profile, call `mbedtls_x509_crt_verify_with_profile` instead of `mbedtls_x509_crt_verify` and pass a profile that allows the curves and hashes you want. For example, to allow SHA-224:
+```C
+mbedtls_x509_crt_profile my_profile = mbedtls_x509_crt_profile_default;
+my_profile.allowed_mds |= MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 );
+```
+
+If you still need to allow hashes and curves in TLS that have been removed from the default configuration, call `mbedtls_ssl_conf_sig_hashes()` and `mbedtls_ssl_conf_curves()` with the desired lists.
+
+### Remove 3DES ciphersuites
+
+This change does not affect users using default settings for 3DES in `mbedtls_config.h`
+because the 3DES ciphersuites were disabled by that.
+
+3DES has weaknesses/limitations and there are better alternatives, and more and
+more standard bodies are recommending against its use in TLS.
+
+The migration path here is to chose from the alternatives recommended in the
+literature, such as AES.

mbedtls.mod/mbedtls/docs/architecture/Makefile

@@ -0,0 +1,26 @@
+PANDOC = pandoc
+
+default: all
+
+all_markdown = \
+	       mbed-crypto-storage-specification.md \
+	       testing/driver-interface-test-strategy.md \
+	       testing/invasive-testing.md \
+	       testing/test-framework.md \
+	       # This line is intentionally left blank
+
+html: $(all_markdown:.md=.html)
+pdf: $(all_markdown:.md=.pdf)
+all: html pdf
+
+.SUFFIXES:
+.SUFFIXES: .md .html .pdf
+
+.md.html:
+	$(PANDOC) -o $@ $<
+.md.pdf:
+	$(PANDOC) -o $@ $<
+
+clean:
+	rm -f *.html *.pdf
+	rm -f testing/*.html testing/*.pdf

mbedtls.mod/mbedtls/docs/architecture/alternative-implementations.md

@@ -0,0 +1,91 @@
+Alternative implementations of Mbed TLS functionality
+=====================================================
+
+This document describes how parts of the Mbed TLS functionality can be replaced at compile time to integrate the library on a platform.
+
+This document is an overview. It is not exhaustive. Please consult the documentation of individual modules and read the library header files for more details.
+
+## Platform integration
+
+Mbed TLS works out of the box on Unix/Linux/POSIX-like systems and on Windows. On embedded platforms, you may need to customize some aspects of how Mbed TLS interacts with the underlying platform. This section discusses the main areas that can be configured.
+
+The platform module (`include/mbedtls/platform.h`) controls how Mbed TLS accesses standard library features such as memory management (`calloc`, `free`), `printf`, `exit`. You can define custom functions instead of the ones from the C standard library through `MBEDTLS_PLATFORM_XXX` options in the configuration file. Many options have two mechanisms: either define `MBEDTLS_PLATFORM_XXX_MACRO` to the name of a function to call instead of the standard function `xxx`, or define `MBEDTLS_PLATFORM_XXX_ALT` and [register an alternative implementation during the platform setup](#alternative-implementations-of-platform-functions).
+
+The storage of the non-volatile seed for random generation, enabled with `MBEDTLS_ENTROPY_NV_SEED`, is also controlled via the platform module.
+
+For timing functions, you can [declare an alternative implementation of the timing module](#module-alternative-implementations).
+
+On multithreaded platforms, [declare an alternative implementation of the threading module](#module-alternative-implementations).
+
+To configure entropy sources (hardware random generators), see the `MBEDTLS_ENTROPY_XXX` options in the configuration file.
+
+For networking, the `net_sockets` module does not currently support alternative implementations. If this module does not work on your platform, disable `MBEDTLS_NET_C` and use custom functions for TLS.
+
+If your platform has a cryptographic accelerator, you can use it via a [PSA driver](#psa-cryptography-drivers) or declare an [alternative implementation of the corresponding module(s)](#module-alternative-implementations) or [of specific functions](#function-alternative-implementations). PSA drivers will ultimately replace the alternative implementation mechanism, but alternative implementation will remain supported in at least all Mbed TLS versions of the form 3.x. The interface of PSA drivers is currently still experimental and subject to change.
+
+## PSA cryptography drivers
+
+On platforms where a hardware cryptographic engine is present, you can implement a driver for this engine in the PSA interface. Drivers are supported for cryptographic operations with transparent keys (keys available in cleartext), for cryptographic operations with opaque keys (keys that are only available inside the cryptographic engine), and for random generation. Calls to `psa_xxx` functions that perform cryptographic operations are directed to drivers instead of the built-in code as applicable. See the [PSA cryptography driver interface specification](docs/proposed/psa-driver-interface.md), the [Mbed TLS PSA driver developer guide](docs/proposed/psa-driver-developer-guide.md) and the [Mbed TLS PSA driver integration guide](docs/proposed/psa-driver-integration-guide.md) for more information.
+
+As of Mbed TLS 3.0, this interface is still experimental and subject to change, and not all operations support drivers yet. The configuration option `MBEDTLS_USE_PSA_CRYPTO` causes parts of the `mbedtls_xxx` API to use PSA crypto and therefore to support drivers, however it is not yet compatible with all drivers.
+
+## Module alternative implementations
+
+You can replace the code of some modules of Mbed TLS at compile time by a custom implementation. This is possible for low-level cryptography modules (symmetric algorithms, DHM, RSA, ECP, ECJPAKE) and for some platform-related modules (threading, timing). Such custom implementations are called “alternative implementations”, or “ALT implementations” for short.
+
+The general principle of an alternative implementation is:
+* Enable `MBEDTLS_XXX_ALT` in the compile-time configuration where XXX is the module name. For example, `MBEDTLS_AES_ALT` for an implementation of the AES module. This is in addition to enabling `MBEDTLS_XXX_C`.
+* Create a header file `xxx_alt.h` that defines the context type(s) used by the module. For example, `mbedtls_aes_context` for AES.
+* Implement all the functions from the module, i.e. the functions declared in `include/mbedtls/xxx.h`.
+
+See https://tls.mbed.org/kb/development/hw_acc_guidelines for a more detailed guide.
+
+### Constraints on context types
+
+Generally, alternative implementations can define their context types to any C type except incomplete and array types (although they would normally be `struct` types). This section lists some known limitations where the context type needs to be a structure with certain fields.
+
+Where a context type needs to have a certain field, the field must have the same type and semantics as in the built-in implementation, but does not need to be at the same position in the structure. Furthermore, unless otherwise indicated, only read access is necessary: the field can be `const`, and modifications to it do not need to be supported. For example, if an alternative implementation of asymmetric cryptography uses a different representation of large integers, it is sufficient to provide a read-only copy of the fields listed here of type `mbedtls_mpi`.
+
+* AES: if `MBEDTLS_AESNI_C` or `MBEDTLS_PADLOCK_C` is enabled, `mbedtls_aes_context` must have the fields `nr` and `rk`.
+* DHM: if `MBEDTLS_DEBUG_C` is enabled, `mbedtls_dhm_context` must have the fields `P`, `Q`, `G`, `GX`, `GY` and `K`.
+* ECP: `mbedtls_ecp_group` must have the fields `id`, `P`, `A`, `B`, `G`, `N`, `pbits` and `nbits`.
+    * If `MBEDTLS_PK_PARSE_EC_EXTENDED` is enabled, those fields must be writable, and `mbedtls_ecp_point_read_binary()` must support a group structure where only `P`, `pbits`, `A` and `B` are set.
+
+It must be possible to move a context object in memory (except during the execution of a library function that takes this context as an argument). (This is necessary, for example, to support applications that populate a context on the stack of an inner function and then copy the context upwards through the call chain, or applications written in a language with automatic memory management that can move objects on the heap.) That is, call sequences like the following must work:
+```
+mbedtls_xxx_context ctx1, ctx2;
+mbedtls_xxx_init(&ctx1);
+mbedtls_xxx_setup(&ctx1, …);
+ctx2 = ctx1;
+memset(&ctx1, 0, sizeof(ctx1));
+mbedtls_xxx_do_stuff(&ctx2, …);
+mbedtls_xxx_free(&ctx2);
+```
+In practice, this means that a pointer to a context or to a part of a context does not remain valid across function calls. Alternative implementations do not need to support copying of contexts: contexts can only be cloned through explicit `clone()` functions.
+
+## Function alternative implementations
+
+In some cases, it is possible to replace a single function or a small set of functions instead of [providing an alternative implementation of the whole module](#module-alternative-implementations).
+
+### Alternative implementations of cryptographic functions
+
+Options to replace individual functions of cryptographic modules generally have a name obtained by upper-casing the function name and appending `_ALT`. If the function name contains `_internal`, `_ext` or `_ret`, this is removed in the `_ALT` symbol. When the corresponding option is enabled, the built-in implementation of the function will not be compiled, and you must provide an alternative implementation at link time.
+
+For example, enable `MBEDTLS_AES_ENCRYPT_ALT` at compile time and provide your own implementation of `mbedtls_aes_encrypt()` to provide an accelerated implementation of AES encryption that is compatible with the built-in key schedule. If you wish to implement key schedule differently, you can also enable `MBEDTLS_AES_SETKEY_ENC_ALT` and implement `mbedtls_aes_setkey_enc()`.
+
+Another example: enable `MBEDTLS_SHA256_PROCESS_ALT` and implement `mbedtls_internal_sha256_process()` to provide an accelerated implementation of SHA-256 and SHA-224.
+
+Note that since alternative implementations of individual functions cooperate with the built-in implementation of other functions, you must use the same layout for context objects as the built-in implementation. If you want to use different context types, you need to [provide an alternative implementation of the whole module](#module-alternative-implementations).
+
+### Alternative implementations of platform functions
+
+Several platform functions can be reconfigured dynamically by following the process described here. To reconfigure how Mbed TLS calls the standard library function `xxx()`:
+
+* Define the symbol `MBEDTLS_PLATFORM_XXX_ALT` at compile time.
+* During the initialization of your application, set the global variable `mbedtls_xxx` to an alternative implementation of `xxx()`.
+
+For example, to provide a custom `printf` function at run time, enable `MBEDTLS_PLATFORM_PRINTF_ALT` at compile time and assign to `mbedtls_printf` during the initialization of your application.
+
+Merely enabling `MBEDTLS_PLATFORM_XXX_ALT` does not change the behavior: by default, `mbedtls_xxx` points to the standard function `xxx`.
+
+Note that there are variations on the naming pattern. For example, some configurable functions are activated in pairs, such as `mbedtls_calloc` and `mbedtls_free` via `MBEDTLS_PLATFORM_MEMORY`. Consult the documentation of individual configuration options and of the platform module for details.

mbedtls.mod/mbedtls/docs/architecture/mbed-crypto-storage-specification.md

@@ -0,0 +1,316 @@
+Mbed Crypto storage specification
+=================================
+
+This document specifies how Mbed Crypto uses storage.
+
+Mbed Crypto may be upgraded on an existing device with the storage preserved. Therefore:
+
+1. Any change may break existing installations and may require an upgrade path.
+1. This document retains historical information about all past released versions. Do not remove information from this document unless it has always been incorrect or it is about a version that you are sure was never released.
+
+Mbed Crypto 0.1.0
+-----------------
+
+Tags: mbedcrypto-0.1.0b, mbedcrypto-0.1.0b2
+
+Released in November 2018. <br>
+Integrated in Mbed OS 5.11.
+
+Supported backends:
+
+* [PSA ITS](#file-namespace-on-its-for-0.1.0)
+* [C stdio](#file-namespace-on-stdio-for-0.1.0)
+
+Supported features:
+
+* [Persistent transparent keys](#key-file-format-for-0.1.0) designated by a [slot number](#key-names-for-0.1.0).
+* [Nonvolatile random seed](#nonvolatile-random-seed-file-format-for-0.1.0) on ITS only.
+
+This is a beta release, and we do not promise backward compatibility, with one exception:
+
+> On Mbed OS, if a device has a nonvolatile random seed file produced with Mbed OS 5.11.x and is upgraded to a later version of Mbed OS, the nonvolatile random seed file is preserved or upgraded.
+
+We do not make any promises regarding key storage, or regarding the nonvolatile random seed file on other platforms.
+
+### Key names for 0.1.0
+
+Information about each key is stored in a dedicated file whose name is constructed from the key identifier. The way in which the file name is constructed depends on the storage backend. The content of the file is described [below](#key-file-format-for-0.1.0).
+
+The valid values for a key identifier are the range from 1 to 0xfffeffff. This limitation on the range is not documented in user-facing documentation: according to the user-facing documentation, arbitrary 32-bit values are valid.
+
+The code uses the following constant in an internal header (note that despite the name, this value is actually one plus the maximum permitted value):
+
+    #define PSA_MAX_PERSISTENT_KEY_IDENTIFIER 0xffff0000
+
+There is a shared namespace for all callers.
+
+### Key file format for 0.1.0
+
+All integers are encoded in little-endian order in 8-bit bytes.
+
+The layout of a key file is:
+
+* magic (8 bytes): `"PSA\0KEY\0"`
+* version (4 bytes): 0
+* type (4 bytes): `psa_key_type_t` value
+* policy usage flags (4 bytes): `psa_key_usage_t` value
+* policy usage algorithm (4 bytes): `psa_algorithm_t` value
+* key material length (4 bytes)
+* key material: output of `psa_export_key`
+* Any trailing data is rejected on load.
+
+### Nonvolatile random seed file format for 0.1.0
+
+The nonvolatile random seed file contains a seed for the random generator. If present, it is rewritten at each boot as part of the random generator initialization.
+
+The file format is just the seed as a byte string with no metadata or encoding of any kind.
+
+### File namespace on ITS for 0.1.0
+
+Assumption: ITS provides a 32-bit file identifier namespace. The Crypto service can use arbitrary file identifiers and no other part of the system accesses the same file identifier namespace.
+
+* File 0: unused.
+* Files 1 through 0xfffeffff: [content](#key-file-format-for-0.1.0) of the [key whose identifier is the file identifier](#key-names-for-0.1.0).
+* File 0xffffff52 (`PSA_CRYPTO_ITS_RANDOM_SEED_UID`): [nonvolatile random seed](#nonvolatile-random-seed-file-format-for-0.1.0).
+* Files 0xffff0000 through 0xffffff51, 0xffffff53 through 0xffffffff: unused.
+
+### File namespace on stdio for 0.1.0
+
+Assumption: C stdio, allowing names containing lowercase letters, digits and underscores, of length up to 23.
+
+An undocumented build-time configuration value `CRYPTO_STORAGE_FILE_LOCATION` allows storing the key files in a directory other than the current directory. This value is simply prepended to the file name (so it must end with a directory separator to put the keys in a different directory).
+
+* `CRYPTO_STORAGE_FILE_LOCATION "psa_key_slot_0"`: used as a temporary file. Must be writable. May be overwritten or deleted if present.
+* `sprintf(CRYPTO_STORAGE_FILE_LOCATION "psa_key_slot_%lu", key_id)` [content](#key-file-format-for-0.1.0) of the [key whose identifier](#key-names-for-0.1.0) is `key_id`.
+* Other files: unused.
+
+Mbed Crypto 1.0.0
+-----------------
+
+Tags: mbedcrypto-1.0.0d4, mbedcrypto-1.0.0
+
+Released in February 2019. <br>
+Integrated in Mbed OS 5.12.
+
+Supported integrations:
+
+* [PSA platform](#file-namespace-on-a-psa-platform-for-1.0.0)
+* [library using PSA ITS](#file-namespace-on-its-as-a-library-for-1.0.0)
+* [library using C stdio](#file-namespace-on-stdio-for-1.0.0)
+
+Supported features:
+
+* [Persistent transparent keys](#key-file-format-for-1.0.0) designated by a [key identifier and owner](#key-names-for-1.0.0).
+* [Nonvolatile random seed](#nonvolatile-random-seed-file-format-for-1.0.0) on ITS only.
+
+Backward compatibility commitments: TBD
+
+### Key names for 1.0.0
+
+Information about each key is stored in a dedicated file designated by the key identifier. In integrations where there is no concept of key owner (in particular, in library integrations), the key identifier is exactly the key identifier as defined in the PSA Cryptography API specification (`psa_key_id_t`). In integrations where there is a concept of key owner (integration into a service for example), the key identifier is made of an owner identifier (its semantics and type are integration specific) and of the key identifier (`psa_key_id_t`) from the key owner point of view.
+
+The way in which the file name is constructed from the key identifier depends on the storage backend. The content of the file is described [below](#key-file-format-for-1.0.0).
+
+* Library integration: the key file name is just the key identifier as defined in the PSA crypto specification. This is a 32-bit value.
+* PSA service integration: the key file name is `(uint32_t)owner_uid << 32 | key_id` where `key_id` is the key identifier from the owner point of view and `owner_uid` (of type `int32_t`) is the calling partition identifier provided to the server by the partition manager. This is a 64-bit value.
+
+### Key file format for 1.0.0
+
+The layout is identical to [0.1.0](#key-file-format-for-0.1.0) so far. However note that the encoding of key types, algorithms and key material has changed, therefore the storage format is not compatible (despite using the same value in the version field so far).
+
+### Nonvolatile random seed file format for 1.0.0
+
+[Identical to 0.1.0](#nonvolatile-random-seed-file-format-for-0.1.0).
+
+### File namespace on a PSA platform for 1.0.0
+
+Assumption: ITS provides a 64-bit file identifier namespace. The Crypto service can use arbitrary file identifiers and no other part of the system accesses the same file identifier namespace.
+
+Assumption: the owner identifier is a nonzero value of type `int32_t`.
+
+* Files 0 through 0xffffff51, 0xffffff53 through 0xffffffff: unused, reserved for internal use of the crypto library or crypto service.
+* File 0xffffff52 (`PSA_CRYPTO_ITS_RANDOM_SEED_UID`): [nonvolatile random seed](#nonvolatile-random-seed-file-format-for-0.1.0).
+* Files 0x100000000 through 0xffffffffffff: [content](#key-file-format-for-1.0.0) of the [key whose identifier is the file identifier](#key-names-for-1.0.0). The upper 32 bits determine the owner.
+
+### File namespace on ITS as a library for 1.0.0
+
+Assumption: ITS provides a 64-bit file identifier namespace. The entity using the crypto library can use arbitrary file identifiers and no other part of the system accesses the same file identifier namespace.
+
+This is a library integration, so there is no owner. The key file identifier is identical to the key identifier.
+
+* File 0: unused.
+* Files 1 through 0xfffeffff: [content](#key-file-format-for-1.0.0) of the [key whose identifier is the file identifier](#key-names-for-1.0.0).
+* File 0xffffff52 (`PSA_CRYPTO_ITS_RANDOM_SEED_UID`): [nonvolatile random seed](#nonvolatile-random-seed-file-format-for-1.0.0).
+* Files 0xffff0000 through 0xffffff51, 0xffffff53 through 0xffffffff, 0x100000000 through 0xffffffffffffffff: unused.
+
+### File namespace on stdio for 1.0.0
+
+This is a library integration, so there is no owner. The key file identifier is identical to the key identifier.
+
+[Identical to 0.1.0](#file-namespace-on-stdio-for-0.1.0).
+
+### Upgrade from 0.1.0 to 1.0.0.
+
+* Delete files 1 through 0xfffeffff, which contain keys in a format that is no longer supported.
+
+### Suggested changes to make before 1.0.0
+
+The library integration and the PSA platform integration use different sets of file names. This is annoyingly non-uniform. For example, if we want to store non-key files, we have room in different ranges (0 through 0xffffffff on a PSA platform, 0xffff0000 through 0xffffffffffffffff in a library integration).
+
+It would simplify things to always have a 32-bit owner, with a nonzero value, and thus reserve the range 0–0xffffffff for internal library use.
+
+Mbed Crypto 1.1.0
+-----------------
+
+Tags: mbedcrypto-1.1.0
+
+Released in early June 2019. <br>
+Integrated in Mbed OS 5.13.
+
+Identical to [1.0.0](#mbed-crypto-1.0.0) except for some changes in the key file format.
+
+### Key file format for 1.1.0
+
+The key file format is identical to [1.0.0](#key-file-format-for-1.0.0), except for the following changes:
+
+* A new policy field, marked as [NEW:1.1.0] below.
+* The encoding of key types, algorithms and key material has changed, therefore the storage format is not compatible (despite using the same value in the version field so far).
+
+A self-contained description of the file layout follows.
+
+All integers are encoded in little-endian order in 8-bit bytes.
+
+The layout of a key file is:
+
+* magic (8 bytes): `"PSA\0KEY\0"`
+* version (4 bytes): 0
+* type (4 bytes): `psa_key_type_t` value
+* policy usage flags (4 bytes): `psa_key_usage_t` value
+* policy usage algorithm (4 bytes): `psa_algorithm_t` value
+* policy enrollment algorithm (4 bytes): `psa_algorithm_t` value [NEW:1.1.0]
+* key material length (4 bytes)
+* key material: output of `psa_export_key`
+* Any trailing data is rejected on load.
+
+Mbed Crypto TBD
+---------------
+
+Tags: TBD
+
+Released in TBD 2019. <br>
+Integrated in Mbed OS TBD.
+
+### Changes introduced in TBD
+
+* The layout of a key file now has a lifetime field before the type field.
+* Key files can store references to keys in a secure element. In such key files, the key material contains the slot number.
+
+### File namespace on a PSA platform on TBD
+
+Assumption: ITS provides a 64-bit file identifier namespace. The Crypto service can use arbitrary file identifiers and no other part of the system accesses the same file identifier namespace.
+
+Assumption: the owner identifier is a nonzero value of type `int32_t`.
+
+* Files 0 through 0xfffeffff: unused.
+* Files 0xffff0000 through 0xffffffff: reserved for internal use of the crypto library or crypto service. See [non-key files](#non-key-files-on-tbd).
+* Files 0x100000000 through 0xffffffffffff: [content](#key-file-format-for-1.0.0) of the [key whose identifier is the file identifier](#key-names-for-1.0.0). The upper 32 bits determine the owner.
+
+### File namespace on ITS as a library on TBD
+
+Assumption: ITS provides a 64-bit file identifier namespace. The entity using the crypto library can use arbitrary file identifiers and no other part of the system accesses the same file identifier namespace.
+
+This is a library integration, so there is no owner. The key file identifier is identical to the key identifier.
+
+* File 0: unused.
+* Files 1 through 0xfffeffff: [content](#key-file-format-for-1.0.0) of the [key whose identifier is the file identifier](#key-names-for-1.0.0).
+* Files 0xffff0000 through 0xffffffff: reserved for internal use of the crypto library or crypto service. See [non-key files](#non-key-files-on-tbd).
+* Files 0x100000000 through 0xffffffffffffffff: unused.
+
+### Non-key files on TBD
+
+File identifiers in the range 0xffff0000 through 0xffffffff are reserved for internal use in Mbed Crypto.
+
+* Files 0xfffffe02 through 0xfffffeff (`PSA_CRYPTO_SE_DRIVER_ITS_UID_BASE + lifetime`): secure element driver storage. The content of the file is the secure element driver's persistent data.
+* File 0xffffff52 (`PSA_CRYPTO_ITS_RANDOM_SEED_UID`): [nonvolatile random seed](#nonvolatile-random-seed-file-format-for-1.0.0).
+* File 0xffffff54 (`PSA_CRYPTO_ITS_TRANSACTION_UID`): [transaction file](#transaction-file-format-for-tbd).
+* Other files are unused and reserved for future use.
+
+### Key file format for TBD
+
+All integers are encoded in little-endian order in 8-bit bytes except where otherwise indicated.
+
+The layout of a key file is:
+
+* magic (8 bytes): `"PSA\0KEY\0"`.
+* version (4 bytes): 0.
+* lifetime (4 bytes): `psa_key_lifetime_t` value.
+* type (4 bytes): `psa_key_type_t` value.
+* policy usage flags (4 bytes): `psa_key_usage_t` value.
+* policy usage algorithm (4 bytes): `psa_algorithm_t` value.
+* policy enrollment algorithm (4 bytes): `psa_algorithm_t` value.
+* key material length (4 bytes).
+* key material:
+    * For a transparent key: output of `psa_export_key`.
+    * For an opaque key (unified driver interface): driver-specific opaque key blob.
+    * For an opaque key (key in a secure element): slot number (8 bytes), in platform endianness.
+* Any trailing data is rejected on load.
+
+### Transaction file format for TBD
+
+The transaction file contains data about an ongoing action that cannot be completed atomically. It exists only if there is an ongoing transaction.
+
+All integers are encoded in platform endianness.
+
+All currently existing transactions concern a key in a secure element.
+
+The layout of a transaction file is:
+
+* type (2 bytes): the [transaction type](#transaction-types-on-tbd).
+* unused (2 bytes)
+* lifetime (4 bytes): `psa_key_lifetime_t` value that corresponds to a key in a secure element.
+* slot number (8 bytes): `psa_key_slot_number_t` value. This is the unique designation of the key for the secure element driver.
+* key identifier (4 bytes in a library integration, 8 bytes on a PSA platform): the internal representation of the key identifier. On a PSA platform, this encodes the key owner in the same way as [in file identifiers for key files](#file-namespace-on-a-psa-platform-on-tbd)).
+
+#### Transaction types on TBD
+
+* 0x0001: key creation. The following locations may or may not contain data about the key that is being created:
+    * The slot in the secure element designated by the slot number.
+    * The file containing the key metadata designated by the key identifier.
+    * The driver persistent data.
+* 0x0002: key destruction. The following locations may or may not still contain data about the key that is being destroyed:
+    * The slot in the secure element designated by the slot number.
+    * The file containing the key metadata designated by the key identifier.
+    * The driver persistent data.
+
+Mbed Crypto TBD
+---------------
+
+Tags: TBD
+
+Released in TBD 2020. <br>
+Integrated in Mbed OS TBD.
+
+### Changes introduced in TBD
+
+* The type field has been split into a type and a bits field of 2 bytes each.
+
+### Key file format for TBD
+
+All integers are encoded in little-endian order in 8-bit bytes except where otherwise indicated.
+
+The layout of a key file is:
+
+* magic (8 bytes): `"PSA\0KEY\0"`.
+* version (4 bytes): 0.
+* lifetime (4 bytes): `psa_key_lifetime_t` value.
+* type (2 bytes): `psa_key_type_t` value.
+* bits (2 bytes): `psa_key_bits_t` value.
+* policy usage flags (4 bytes): `psa_key_usage_t` value.
+* policy usage algorithm (4 bytes): `psa_algorithm_t` value.
+* policy enrollment algorithm (4 bytes): `psa_algorithm_t` value.
+* key material length (4 bytes).
+* key material:
+    * For a transparent key: output of `psa_export_key`.
+    * For an opaque key (unified driver interface): driver-specific opaque key blob.
+    * For an opaque key (key in a secure element): slot number (8 bytes), in platform endianness.
+* Any trailing data is rejected on load.

mbedtls.mod/mbedtls/docs/architecture/psa-crypto-implementation-structure.md

@@ -0,0 +1,73 @@
+PSA Cryptograpy API implementation and PSA driver interface
+===========================================================
+
+## Introduction
+
+The [PSA Cryptography API specification](https://armmbed.github.io/mbed-crypto/psa/#application-programming-interface) defines an interface to cryptographic operations for which the Mbed TLS library provides a reference implementation. The PSA Cryptography API specification is complemented by the PSA driver interface specification which defines an interface for cryptoprocessor drivers.
+
+This document describes the high level organization of the Mbed TLS PSA Cryptography API implementation which is tightly related to the PSA driver interface.
+
+## High level organization of the Mbed TLS PSA Cryptography API implementation
+In one sentence, the Mbed TLS PSA Cryptography API implementation is made of a core and PSA drivers as defined in the PSA driver interface. The key point is that software cryptographic operations are organized as PSA drivers: they interact with the core through the PSA driver interface.
+
+### Rationale
+
+* Addressing software and hardware cryptographic implementations through the same C interface reduces the core code size and its call graph complexity. The core and its dispatching to software and hardware implementations are consequently easier to test and validate.
+* The organization of the software cryptographic implementations in drivers promotes modularization of those implementations.
+* As hardware capabilities, software cryptographic functionalities can be described by a JSON driver description file as defined in the PSA driver interface.
+* Along with JSON driver description files, the PSA driver specification defines the deliverables for a driver to be included into the Mbed TLS PSA Cryptography implementation. This provides a natural framework to integrate third party or alternative software implementations of cryptographic operations.
+
+## The Mbed TLS PSA Cryptography API implementation core
+
+The core implements all the APIs as defined in the PSA Cryptography API specification but does not perform on its own any cryptographic operation. The core relies on PSA drivers to actually
+perform the cryptographic operations. The core is responsible for:
+
+* the key store.
+* checking PSA API arguments and translating them into valid arguments for the necessary calls to the PSA driver interface.
+* dispatching the cryptographic operations to the appropriate PSA drivers.
+
+The sketch of an Mbed TLS PSA cryptographic API implementation is thus:
+```C                                                                            
+psa_status_t psa_api( ... )
+{
+    psa_status_t status;
+
+    /* Pre driver interface call processing: validation of arguments, building
+     * of arguments for the call to the driver interface, ... */
+
+    ...
+
+    /* Call to the driver interface */
+    status = psa_driver_wrapper_<entry_point>( ... );
+    if( status != PSA_SUCCESS )
+        return( status );
+
+    /* Post driver interface call processing: validation of the values returned
+     * by the driver, finalization of the values to return to the caller,
+     * clean-up in case of error ... */
+}
+```
+The code of most PSA APIs is expected to match precisely the above layout. However, it is likely that the code structure of some APIs will be more complicated with several calls to the driver interface, mainly to encompass a larger variety of hardware designs. For example, to encompass hardware accelerators that are capable of verifying a MAC and those that are only capable of computing a MAC, the psa_mac_verify() API could call first psa_driver_wrapper_mac_verify() and then fallback to psa_driver_wrapper_mac_compute().
+
+The implementations of `psa_driver_wrapper_<entry_point>` functions are generated by the build system based on the JSON driver description files of the various PSA drivers making up the Mbed TLS PSA Cryptography API implementation. The implementations are generated in a psa_crypto_driver_wrappers.c C file and the function prototypes declared in a psa_crypto_driver_wrappers.h header file.
+
+The psa_driver_wrapper_<entry_point>() functions dispatch cryptographic operations to accelerator drivers, secure element drivers as well as to the software implementations of cryptographic operations.
+
+Note that the implementation allows to build the library with only a C compiler by shipping a generated file corresponding to a pure software implementation. The driver entry points and their code in this generated file are guarded by pre-processor directives based on PSA_WANT_xyz macros (see [Conditional inclusion of cryptographic mechanism through the PSA API in Mbed TLS](psa-conditional-inclusion-c.html). That way, it is possible to compile and include in the library only the desired cryptographic operations.
+
+### Key creation
+
+Key creation implementation in Mbed TLS PSA core is articulated around three internal functions: psa_start_key_creation(), psa_finish_key_creation() and psa_fail_key_creation(). Implementations of key creation PSA APIs, namely psa_import_key(), psa_generate_key(), psa_key_derivation_output_key() and psa_copy_key() go by the following sequence:
+    1. Check the input parameters.
+    2. Call psa_start_key_creation() that allocates a key slot, prepares it with the specified key attributes, and in case of a volatile key assign it a volatile key identifier.
+    3. Generate or copy the key material into the key slot. This entails the allocation of the buffer to store the key material.
+    4. Call psa_finish_key_creation() that mostly saves persistent keys into persistent storage.
+
+In case of any error occurring at step 3 or 4, psa_fail_key_creation() is called. It wipes and cleans the slot especially the key material: reset to zero of the RAM memory that contained the key material, free the allocated buffer.
+
+
+## Mbed TLS PSA Cryptography API implementation drivers
+
+A driver of the Mbed TLS PSA Cryptography API implementation (Mbed TLS PSA driver in the following) is a driver in the sense that it is compliant with the PSA driver interface specification. But it is not an actual driver that drives some hardware. It implements cryptographic operations purely in software.
+
+An Mbed TLS PSA driver C file is named psa_crypto_<driver_name>.c and its associated header file psa_crypto_<driver_name>.h. The functions implementing a driver entry point as defined in the PSA driver interface specification are named as mbedtls_psa_<driver name>_<entry point>(). As an example, the psa_crypto_rsa.c and psa_crypto_rsa.h are the files containing the Mbed TLS PSA driver implementing RSA cryptographic operations. This RSA driver implements among other entry points the "import_key" entry point. The function implementing this entry point is named mbedtls_psa_rsa_import_key().