engines/ccgost/gost_asn1.c

   1 /**********************************************************************
   2  *                          gost_keytrans.c                           *
   3  *             Copyright (c) 2005-2006 Cryptocom LTD                  *
   4  *         This file is distributed under the same license as OpenSSL *
   5  *                                                                    *
   6  *   ASN1 structure definition for GOST key transport                 *
   7  *          Requires OpenSSL 0.9.9 for compilation                    *
   8  **********************************************************************/
   9 #include <stdio.h>
  10 #include <openssl/asn1t.h>
  11 #include <openssl/x509.h>
  12 #include "gost_lcl.h"
  13
  14 ASN1_NDEF_SEQUENCE(GOST_KEY_TRANSPORT) = {
  15         ASN1_SIMPLE(GOST_KEY_TRANSPORT, key_info, GOST_KEY_INFO),
  16         ASN1_IMP(GOST_KEY_TRANSPORT, key_agreement_info, GOST_KEY_AGREEMENT_INFO, 0)
  17 } ASN1_NDEF_SEQUENCE_END(GOST_KEY_TRANSPORT)
  18
  19 IMPLEMENT_ASN1_FUNCTIONS(GOST_KEY_TRANSPORT)
  20
  21 ASN1_NDEF_SEQUENCE(GOST_KEY_INFO) = {
  22         ASN1_SIMPLE(GOST_KEY_INFO, encrypted_key, ASN1_OCTET_STRING),
  23         ASN1_SIMPLE(GOST_KEY_INFO, imit,          ASN1_OCTET_STRING)
  24 } ASN1_NDEF_SEQUENCE_END(GOST_KEY_INFO)
  25
  26 IMPLEMENT_ASN1_FUNCTIONS(GOST_KEY_INFO)
  27
  28 ASN1_NDEF_SEQUENCE(GOST_KEY_AGREEMENT_INFO) = {
  29         ASN1_SIMPLE(GOST_KEY_AGREEMENT_INFO, cipher, ASN1_OBJECT),
  30         ASN1_IMP_OPT(GOST_KEY_AGREEMENT_INFO, ephem_key, X509_PUBKEY, 0),
  31         ASN1_SIMPLE(GOST_KEY_AGREEMENT_INFO, eph_iv, ASN1_OCTET_STRING)
  32 } ASN1_NDEF_SEQUENCE_END(GOST_KEY_AGREEMENT_INFO)
  33
  34 IMPLEMENT_ASN1_FUNCTIONS(GOST_KEY_AGREEMENT_INFO)
  35
  36 ASN1_NDEF_SEQUENCE(GOST_KEY_PARAMS) = {
  37         ASN1_SIMPLE(GOST_KEY_PARAMS, key_params, ASN1_OBJECT),
  38         ASN1_SIMPLE(GOST_KEY_PARAMS, hash_params, ASN1_OBJECT),
  39         ASN1_OPT(GOST_KEY_PARAMS, cipher_params, ASN1_OBJECT),
  40 } ASN1_NDEF_SEQUENCE_END(GOST_KEY_PARAMS)
  41
  42 IMPLEMENT_ASN1_FUNCTIONS(GOST_KEY_PARAMS)
  43
  44 ASN1_NDEF_SEQUENCE(GOST_CIPHER_PARAMS) = {
  45         ASN1_SIMPLE(GOST_CIPHER_PARAMS, iv, ASN1_OCTET_STRING),
  46         ASN1_SIMPLE(GOST_CIPHER_PARAMS, enc_param_set, ASN1_OBJECT),
  47 } ASN1_NDEF_SEQUENCE_END(GOST_CIPHER_PARAMS)
  48
  49 IMPLEMENT_ASN1_FUNCTIONS(GOST_CIPHER_PARAMS)
  50
  51 ASN1_NDEF_SEQUENCE(GOST_CLIENT_KEY_EXCHANGE_PARAMS) = { /* FIXME incomplete */
  52     ASN1_SIMPLE(GOST_CLIENT_KEY_EXCHANGE_PARAMS, gkt, GOST_KEY_TRANSPORT)
  53 }
  54
  55 ASN1_NDEF_SEQUENCE_END(GOST_CLIENT_KEY_EXCHANGE_PARAMS)
  56 IMPLEMENT_ASN1_FUNCTIONS(GOST_CLIENT_KEY_EXCHANGE_PARAMS)
  57
  58 /* Convert byte buffer to bignum, skipping leading zeros*/
  59 BIGNUM *getbnfrombuf(const unsigned char *buf, size_t len)
  60 {
  61     BIGNUM *b;
  62
  63     while (*buf == 0 && len > 0) {
  64         buf++;
  65         len--;
  66     }
  67     if (len)
  68         return BN_bin2bn(buf, len, NULL);
  69     b = BN_new();
  70     BN_zero(b);
  71     return b;
  72 }