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/**********************************************************************
* md_gost.c *
* Copyright (c) 2005-2006 Cryptocom LTD *
* This file is distributed under the same license as OpenSSL *
* *
* OpenSSL interface to GOST R 34.11-94 hash functions *
* Requires OpenSSL 0.9.9 for compilation *
**********************************************************************/
#include <string.h>
#include "gost_lcl.h"
#include "gosthash.h"
#include "e_gost_err.h"
/* implementation of GOST 34.11 hash function See gost_md.c*/
static int gost_digest_init(EVP_MD_CTX *ctx);
static int gost_digest_update(EVP_MD_CTX *ctx, const void *data,
size_t count);
static int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md);
static int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
static int gost_digest_cleanup(EVP_MD_CTX *ctx);
EVP_MD digest_gost = {
NID_id_GostR3411_94,
NID_undef,
32,
EVP_MD_FLAG_PKEY_METHOD_SIGNATURE,
gost_digest_init,
gost_digest_update,
gost_digest_final,
gost_digest_copy,
gost_digest_cleanup,
NULL,
NULL,
{NID_undef, NID_undef, 0, 0, 0},
32,
sizeof(struct ossl_gost_digest_ctx),
NULL
};
int gost_digest_init(EVP_MD_CTX *ctx)
{
struct ossl_gost_digest_ctx *c = ctx->md_data;
memset(&(c->dctx), 0, sizeof(gost_hash_ctx));
gost_init(&(c->cctx), &GostR3411_94_CryptoProParamSet);
c->dctx.cipher_ctx = &(c->cctx);
return 1;
}
int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
return hash_block((gost_hash_ctx *) ctx->md_data, data, count);
}
int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
{
return finish_hash((gost_hash_ctx *) ctx->md_data, md);
}
int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
{
struct ossl_gost_digest_ctx *md_ctx = to->md_data;
if (to->md_data && from->md_data) {
memcpy(to->md_data, from->md_data,
sizeof(struct ossl_gost_digest_ctx));
md_ctx->dctx.cipher_ctx = &(md_ctx->cctx);
}
return 1;
}
int gost_digest_cleanup(EVP_MD_CTX *ctx)
{
if (ctx->md_data)
memset(ctx->md_data, 0, sizeof(struct ossl_gost_digest_ctx));
return 1;
}
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