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@@ -4,7 +4,7 @@
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* \brief Internal functions shared by the SSL modules
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* \brief Internal functions shared by the SSL modules
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*/
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*/
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/*
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/*
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- * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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+ * Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*
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*
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* This file is provided under the Apache License 2.0, or the
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* This file is provided under the Apache License 2.0, or the
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@@ -45,8 +45,6 @@
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*
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* **********
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* **********
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- *
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- * This file is part of mbed TLS (https://tls.mbed.org)
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*/
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*/
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#ifndef MBEDTLS_SSL_INTERNAL_H
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#ifndef MBEDTLS_SSL_INTERNAL_H
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#define MBEDTLS_SSL_INTERNAL_H
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#define MBEDTLS_SSL_INTERNAL_H
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@@ -152,6 +150,24 @@
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#define MBEDTLS_SSL_RETRANS_WAITING 2
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#define MBEDTLS_SSL_RETRANS_WAITING 2
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#define MBEDTLS_SSL_RETRANS_FINISHED 3
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#define MBEDTLS_SSL_RETRANS_FINISHED 3
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+/* This macro determines whether CBC is supported. */
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+#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
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+ ( defined(MBEDTLS_AES_C) || \
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+ defined(MBEDTLS_CAMELLIA_C) || \
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+ defined(MBEDTLS_ARIA_C) || \
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+ defined(MBEDTLS_DES_C) )
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+#define MBEDTLS_SSL_SOME_SUITES_USE_CBC
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+#endif
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+
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+/* This macro determines whether the CBC construct used in TLS 1.0-1.2 (as
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+ * opposed to the very different CBC construct used in SSLv3) is supported. */
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+#if defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC) && \
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+ ( defined(MBEDTLS_SSL_PROTO_TLS1) || \
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+ defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
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+ defined(MBEDTLS_SSL_PROTO_TLS1_2) )
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+#define MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC
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+#endif
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+
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/*
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/*
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* Allow extra bytes for record, authentication and encryption overhead:
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* Allow extra bytes for record, authentication and encryption overhead:
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* counter (8) + header (5) + IV(16) + MAC (16-48) + padding (0-256)
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* counter (8) + header (5) + IV(16) + MAC (16-48) + padding (0-256)
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@@ -843,6 +859,73 @@ int mbedtls_ssl_get_key_exchange_md_tls1_2( mbedtls_ssl_context *ssl,
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#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \
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#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \
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MBEDTLS_SSL_PROTO_TLS1_2 */
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MBEDTLS_SSL_PROTO_TLS1_2 */
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+#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)
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+/** \brief Compute the HMAC of variable-length data with constant flow.
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+ *
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+ * This function computes the HMAC of the concatenation of \p add_data and \p
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+ * data, and does with a code flow and memory access pattern that does not
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+ * depend on \p data_len_secret, but only on \p min_data_len and \p
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+ * max_data_len. In particular, this function always reads exactly \p
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+ * max_data_len bytes from \p data.
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+ *
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+ * \param ctx The HMAC context. It must have keys configured
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+ * with mbedtls_md_hmac_starts() and use one of the
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+ * following hashes: SHA-384, SHA-256, SHA-1 or MD-5.
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+ * It is reset using mbedtls_md_hmac_reset() after
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+ * the computation is complete to prepare for the
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+ * next computation.
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+ * \param add_data The additional data prepended to \p data. This
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+ * must point to a readable buffer of \p add_data_len
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+ * bytes.
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+ * \param add_data_len The length of \p add_data in bytes.
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+ * \param data The data appended to \p add_data. This must point
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+ * to a readable buffer of \p max_data_len bytes.
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+ * \param data_len_secret The length of the data to process in \p data.
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+ * This must be no less than \p min_data_len and no
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+ * greater than \p max_data_len.
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+ * \param min_data_len The minimal length of \p data in bytes.
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+ * \param max_data_len The maximal length of \p data in bytes.
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+ * \param output The HMAC will be written here. This must point to
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+ * a writable buffer of sufficient size to hold the
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+ * HMAC value.
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+ *
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+ * \retval 0
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+ * Success.
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+ * \retval MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED
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+ * The hardware accelerator failed.
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+ */
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+int mbedtls_ssl_cf_hmac(
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+ mbedtls_md_context_t *ctx,
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+ const unsigned char *add_data, size_t add_data_len,
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+ const unsigned char *data, size_t data_len_secret,
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+ size_t min_data_len, size_t max_data_len,
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+ unsigned char *output );
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+
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+/** \brief Copy data from a secret position with constant flow.
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+ *
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+ * This function copies \p len bytes from \p src_base + \p offset_secret to \p
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+ * dst, with a code flow and memory access pattern that does not depend on \p
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+ * offset_secret, but only on \p offset_min, \p offset_max and \p len.
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+ *
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+ * \param dst The destination buffer. This must point to a writable
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+ * buffer of at least \p len bytes.
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+ * \param src_base The base of the source buffer. This must point to a
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+ * readable buffer of at least \p offset_max + \p len
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+ * bytes.
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+ * \param offset_secret The offset in the source buffer from which to copy.
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+ * This must be no less than \p offset_min and no greater
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+ * than \p offset_max.
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+ * \param offset_min The minimal value of \p offset_secret.
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+ * \param offset_max The maximal value of \p offset_secret.
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+ * \param len The number of bytes to copy.
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+ */
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+void mbedtls_ssl_cf_memcpy_offset( unsigned char *dst,
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+ const unsigned char *src_base,
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+ size_t offset_secret,
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+ size_t offset_min, size_t offset_max,
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+ size_t len );
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+#endif /* MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC */
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+
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#ifdef __cplusplus
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#ifdef __cplusplus
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}
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}
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#endif
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#endif
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