add maps for ASN.1 en-/decoding

src/headers/tomcrypt_pk.h

@@ -517,6 +517,7 @@ typedef enum ltc_asn1_type_ {
  LTC_ASN1_CONTEXT_SPECIFIC,
  /* 20 */
  LTC_ASN1_GENERALIZEDTIME,
+ LTC_ASN1_CUSTOM_TYPE,
 } ltc_asn1_type;
 
 /** A LTC ASN.1 list type */
@@ -554,6 +555,15 @@ int der_decode_asn1_length(const unsigned char* len, unsigned long* lenlen, unsi
 int der_length_asn1_length(unsigned long len, unsigned long *outlen);
 
 
+extern const char*          der_asn1_class_to_string_map[];
+extern const unsigned long  der_asn1_class_to_string_map_sz;
+
+extern const char*          der_asn1_pc_to_string_map[];
+extern const unsigned long  der_asn1_pc_to_string_map_sz;
+
+extern const char*          der_asn1_tag_to_string_map[];
+extern const unsigned long  der_asn1_tag_to_string_map_sz;
+
 /* SEQUENCE */
 int der_encode_sequence_ex(ltc_asn1_list *list, unsigned long inlen,
                            unsigned char *out,  unsigned long *outlen, int type_of);
@@ -572,6 +582,12 @@ int der_length_sequence(ltc_asn1_list *list, unsigned long inlen,
 /* internal helper functions */
 int der_length_sequence_ex(ltc_asn1_list *list, unsigned long inlen,
                            unsigned long *outlen, unsigned long *payloadlen);
+
+extern const ltc_asn1_type  der_asn1_tag_to_type_map[];
+extern const unsigned long  der_asn1_tag_to_type_map_sz;
+
+extern const int der_asn1_type_to_identifier_map[];
+extern const unsigned long der_asn1_type_to_identifier_map_sz;
 #endif /* LTC_SOURCE */
 
 /* SET */

src/misc/crypt/crypt_constants.c

@@ -132,6 +132,7 @@ static const crypt_constant _crypt_constants[] = {
     _C_STRINGIFY(LTC_ASN1_CONSTRUCTED),
     _C_STRINGIFY(LTC_ASN1_CONTEXT_SPECIFIC),
     _C_STRINGIFY(LTC_ASN1_GENERALIZEDTIME),
+    _C_STRINGIFY(LTC_ASN1_CUSTOM_TYPE),
 #endif
 
 #ifdef LTC_CTR_MODE

src/pk/asn1/der/general/der_asn1_maps.c

@@ -0,0 +1,170 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+  @file der_asn1_maps.c
+  ASN.1 DER, a collection of maps to convert between different representations, Steffen Jaeckel
+*/
+
+#ifdef LTC_DER
+
+/**
+  A Map from ltc_asn1_type to the regularly used ASN.1 identifier
+*/
+const int der_asn1_type_to_identifier_map[] =
+{
+     /*  0 */
+ -1, /* LTC_ASN1_EOL, */
+  1, /* LTC_ASN1_BOOLEAN, */
+  2, /* LTC_ASN1_INTEGER, */
+  2, /* LTC_ASN1_SHORT_INTEGER, */
+  3, /* LTC_ASN1_BIT_STRING, */
+     /*  5 */
+  4, /* LTC_ASN1_OCTET_STRING, */
+  5, /* LTC_ASN1_NULL, */
+  6, /* LTC_ASN1_OBJECT_IDENTIFIER, */
+ 22, /* LTC_ASN1_IA5_STRING, */
+ 19, /* LTC_ASN1_PRINTABLE_STRING, */
+     /* 10 */
+ 12, /* LTC_ASN1_UTF8_STRING, */
+ 23, /* LTC_ASN1_UTCTIME, */
+ -1, /* LTC_ASN1_CHOICE, */
+ 48, /* LTC_ASN1_SEQUENCE, */
+ 49, /* LTC_ASN1_SET, */
+     /* 15 */
+ 49, /* LTC_ASN1_SETOF, */
+  3, /* LTC_ASN1_RAW_BIT_STRING, */
+ 20, /* LTC_ASN1_TELETEX_STRING, */
+ -1, /* LTC_ASN1_CONSTRUCTED, */
+ -1, /* LTC_ASN1_CONTEXT_SPECIFIC, */
+     /* 20 */
+ 24, /* LTC_ASN1_GENERALIZEDTIME, */
+ -1, /* LTC_ASN1_CUSTOM_TYPE, */
+};
+const unsigned long der_asn1_type_to_identifier_map_sz = sizeof(der_asn1_type_to_identifier_map)/sizeof(der_asn1_type_to_identifier_map[0]);
+
+/**
+  A Map from the ASN.1 Class to its string
+*/
+const char* der_asn1_class_to_string_map[] =
+{
+  "UNIVERSAL",
+  "APPLICATION",
+  "CONTEXT-SPECIFIC",
+  "PRIVATE",
+};
+const unsigned long der_asn1_class_to_string_map_sz = sizeof(der_asn1_class_to_string_map)/sizeof(der_asn1_class_to_string_map[0]);
+
+/**
+  A Map from the ASN.1 P/C-bit to its string
+*/
+const char* der_asn1_pc_to_string_map[] =
+{
+  "PRIMITIVE",
+  "CONSTRUCTED",
+};
+const unsigned long der_asn1_pc_to_string_map_sz = sizeof(der_asn1_pc_to_string_map)/sizeof(der_asn1_pc_to_string_map[0]);
+
+/**
+  A Map from the ASN.1 tag to its string
+*/
+const char* der_asn1_tag_to_string_map[] =
+{
+  "Reserved for use by the encoding rules",
+  "Boolean type",
+  "Integer type",
+  "Bitstring type",
+  "Octetstring type",
+  "Null type",
+  "Object identifier type",
+  "Object descriptor type",
+  "External type and Instance-of type",
+  "Real type",
+  "Enumerated type",
+  "Embedded-pdv type",
+  "UTF8String type",
+  "Relative object identifier type",
+  "The time type",
+  "Reserved for future editions of this Recommendation | International Standard",
+  "Sequence and Sequence-of types",
+  "Set and Set-of types",
+  "NumericString type",
+  "PrintableString type",
+  "TeletexString (T61String) type",
+  "VideotexString type",
+  "IA5String type",
+  "UTCTime type",
+  "GeneralizedTime type",
+  "GraphicString type",
+  "VisibleString (ISO646String) type",
+  "GeneralString type",
+  "UniversalString type",
+  "UnrestrictedCharacterString type",
+  "BMPString type",
+  "Date type",
+  "TimeOfDay type",
+  "DateTime type",
+  "Duration type",
+  "OID internationalized resource identifier type",
+  "Relative OID internationalized resource identifier type",
+};
+const unsigned long der_asn1_tag_to_string_map_sz = sizeof(der_asn1_tag_to_string_map)/sizeof(der_asn1_tag_to_string_map[0]);
+
+/**
+  A Map from ASN.1 Tags to ltc_asn1_type
+*/
+const ltc_asn1_type der_asn1_tag_to_type_map[] =
+{
+  /*  0 */
+  LTC_ASN1_EOL,               /* Reserved for use by the encoding rules */
+  LTC_ASN1_BOOLEAN,           /* Boolean type */
+  LTC_ASN1_INTEGER,           /* Integer type */
+  LTC_ASN1_BIT_STRING,        /* Bitstring type */
+  LTC_ASN1_OCTET_STRING,      /* Octetstring type */
+  /*  5 */
+  LTC_ASN1_NULL,              /* Null type */
+  LTC_ASN1_OBJECT_IDENTIFIER, /* Object identifier type */
+  LTC_ASN1_CUSTOM_TYPE,      /* Object descriptor type */
+  LTC_ASN1_CUSTOM_TYPE,      /* External type and Instance-of type */
+  LTC_ASN1_CUSTOM_TYPE,      /* Real type */
+  /* 10 */
+  LTC_ASN1_CUSTOM_TYPE,      /* Enumerated type */
+  LTC_ASN1_CUSTOM_TYPE,      /* Embedded-pdv type */
+  LTC_ASN1_UTF8_STRING,       /* UTF8String type */
+  LTC_ASN1_CUSTOM_TYPE,      /* Relative object identifier type */
+  LTC_ASN1_CUSTOM_TYPE,      /* The time type */
+  /* 15 */
+  LTC_ASN1_EOL,               /* Reserved for future editions of this Recommendation | International Standard */
+  LTC_ASN1_SEQUENCE,          /* Sequence and Sequence-of types */
+  LTC_ASN1_SET,               /* Set and Set-of types */
+  LTC_ASN1_CUSTOM_TYPE,      /* NumericString types */
+  LTC_ASN1_PRINTABLE_STRING,  /* PrintableString types */
+  /* 20 */
+  LTC_ASN1_TELETEX_STRING,    /* TeletexString (T61String) types */
+  LTC_ASN1_CUSTOM_TYPE,      /* VideotexString types */
+  LTC_ASN1_IA5_STRING,        /* IA5String types */
+  LTC_ASN1_UTCTIME,           /* UTCTime types */
+  LTC_ASN1_GENERALIZEDTIME,   /* GeneralizedTime types */
+  /* 25 */
+  LTC_ASN1_CUSTOM_TYPE,      /* GraphicString types */
+  LTC_ASN1_CUSTOM_TYPE,      /* VisibleString (ISO646String) types */
+  LTC_ASN1_CUSTOM_TYPE,      /* GeneralString types */
+  LTC_ASN1_CUSTOM_TYPE,      /* UniversalString types */
+  LTC_ASN1_CUSTOM_TYPE,      /* UnrestrictedCharacterString types */
+  /* 30 */
+  LTC_ASN1_CUSTOM_TYPE,      /* BMPString types */
+};
+const unsigned long der_asn1_tag_to_type_map_sz = sizeof(der_asn1_tag_to_type_map)/sizeof(der_asn1_tag_to_type_map[0]);
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */