engines/ccgost/md_gost.c

   1 /**********************************************************************
   2  *                          md_gost.c                                 *
   3  *             Copyright (c) 2005-2006 Cryptocom LTD                  *
   4  *         This file is distributed under the same license as OpenSSL *
   5  *                                                                    *
   6  *       OpenSSL interface to GOST R 34.11-94 hash functions          *
   7  *          Requires OpenSSL 0.9.9 for compilation                    *
   8  **********************************************************************/
   9 #include <string.h>
  10 #include "md.h"
  11 #include "gosthash.h"
  12 #include "e_gost_err.h"
  13
  14 /* implementation of GOST 34.11 hash function See gost_md.c*/
  15 static int gost_digest_init(EVP_MD_CTX *ctx);
  16 static int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count);
  17 static int gost_digest_final(EVP_MD_CTX *ctx,unsigned char *md);
  18 static int gost_digest_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from);
  19 static int gost_digest_cleanup(EVP_MD_CTX *ctx);
  20
  21 EVP_MD digest_gost=
  22 {
  23                 NID_id_GostR3411_94,
  24                 NID_undef,
  25                 32,
  26                 EVP_MD_FLAG_PKEY_METHOD_SIGNATURE,
  27                 gost_digest_init,
  28                 gost_digest_update,
  29                 gost_digest_final,
  30                 gost_digest_copy,
  31                 gost_digest_cleanup,
  32                 NULL,
  33                 NULL,
  34                 {NID_undef,NID_undef,0,0,0},
  35                 32,
  36                 sizeof(struct ossl_gost_digest_ctx ),
  37                 NULL
  38 };
  39
  40 int gost_digest_init(EVP_MD_CTX *ctx)
  41 {
  42         struct ossl_gost_digest_ctx *c = ctx->md_data;
  43         memset(&(c->dctx),0,sizeof(gost_hash_ctx));
  44         gost_init(&(c->cctx),&GostR3411_94_CryptoProParamSet);
  45         c->dctx.cipher_ctx= &(c->cctx);
  46         return 1;
  47 }
  48
  49 int gost_digest_update(EVP_MD_CTX *ctx,const void *data,size_t count)
  50 {
  51         return hash_block((gost_hash_ctx *)ctx->md_data,data,count);
  52 }
  53
  54 int gost_digest_final(EVP_MD_CTX *ctx,unsigned char *md)
  55 {
  56         return finish_hash((gost_hash_ctx *)ctx->md_data,md);
  57
  58 }
  59
  60 int gost_digest_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from)
  61 {
  62                 memcpy(to->md_data,from->md_data,sizeof(struct ossl_gost_digest_ctx));
  63                 return 1;
  64 }
  65
  66 int gost_digest_cleanup(EVP_MD_CTX *ctx) {
  67         memset(ctx->md_data,0,sizeof(struct ossl_gost_digest_ctx));
  68         return 1;
  69 }