crypto/external/bsd/openssl/dist/engines/ccgost/gost_md.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 "gost_lcl.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         struct ossl_gost_digest_ctx *md_ctx=to->md_data;
  63         if (to->md_data && from->md_data) {
  64                 memcpy(to->md_data,from->md_data,sizeof(struct ossl_gost_digest_ctx));
  65                 md_ctx->dctx.cipher_ctx=&(md_ctx->cctx);
  66         }
  67         return 1;
  68         }
  69
  70 int gost_digest_cleanup(EVP_MD_CTX *ctx)
  71         {
  72         if (ctx->md_data)
  73         memset(ctx->md_data,0,sizeof(struct ossl_gost_digest_ctx));
  74         return 1;
  75         }