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/**********************************************************************
* gost_md2012.c *
* Copyright (c) 2013 Cryptocom LTD. *
* This file is distributed under the same license as OpenSSL *
* *
* GOST R 34.11-2012 interface to OpenSSL engine. *
* *
* Author: Alexey Degtyarev <alexey@renatasystems.org> *
* *
**********************************************************************/
#include <openssl/evp.h>
#include "gosthash2012.h"
static int gost_digest_init512(EVP_MD_CTX *ctx);
static int gost_digest_init256(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);
static int gost_digest_ctrl_256(EVP_MD_CTX *ctx, int type, int arg,
void *ptr);
static int gost_digest_ctrl_512(EVP_MD_CTX *ctx, int type, int arg,
void *ptr);
const char micalg_256[] = "gostr3411-2012-256";
const char micalg_512[] = "gostr3411-2012-512";
EVP_MD digest_gost2012_512 = {
NID_id_GostR3411_2012_512,
NID_undef,
64, /* digest size */
EVP_MD_FLAG_PKEY_METHOD_SIGNATURE,
gost_digest_init512,
gost_digest_update,
gost_digest_final,
gost_digest_copy,
gost_digest_cleanup,
NULL,
NULL,
{NID_undef, NID_undef, 0, 0, 0},
64, /* block size */
sizeof(gost2012_hash_ctx),
gost_digest_ctrl_512,
};
EVP_MD digest_gost2012_256 = {
NID_id_GostR3411_2012_256,
NID_undef,
32, /* digest size */
EVP_MD_FLAG_PKEY_METHOD_SIGNATURE,
gost_digest_init256,
gost_digest_update,
gost_digest_final,
gost_digest_copy,
gost_digest_cleanup,
NULL,
NULL,
{NID_undef, NID_undef, 0, 0, 0},
64, /* block size */
sizeof(gost2012_hash_ctx),
gost_digest_ctrl_256
};
static int gost_digest_init512(EVP_MD_CTX *ctx)
{
init_gost2012_hash_ctx((gost2012_hash_ctx *) ctx->md_data, 512);
return 1;
}
static int gost_digest_init256(EVP_MD_CTX *ctx)
{
init_gost2012_hash_ctx((gost2012_hash_ctx *) ctx->md_data, 256);
return 1;
}
static int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
gost2012_hash_block((gost2012_hash_ctx *) ctx->md_data, data, count);
return 1;
}
static int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
{
gost2012_finish_hash((gost2012_hash_ctx *) ctx->md_data, md);
return 1;
}
static int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
{
if (to->md_data && from->md_data)
memcpy(to->md_data, from->md_data, sizeof(gost2012_hash_ctx));
return 1;
}
static int gost_digest_cleanup(EVP_MD_CTX *ctx)
{
if (ctx->md_data)
memset(ctx->md_data, 0x00, sizeof(gost2012_hash_ctx));
return 1;
}
static int gost_digest_ctrl_256(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
{
switch (type) {
case EVP_MD_CTRL_MICALG:
{
*((char **)ptr) = OPENSSL_malloc(strlen(micalg_256) + 1);
if (*((char **)ptr) != NULL) {
strcpy(*((char **)ptr), micalg_256);
return 1;
}
return 0;
}
default:
return 0;
}
}
static int gost_digest_ctrl_512(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
{
switch (type) {
case EVP_MD_CTRL_MICALG:
{
*((char **)ptr) = OPENSSL_malloc(strlen(micalg_512) + 1);
if (*((char **)ptr) != NULL) {
strcpy(*((char **)ptr), micalg_512);
return 1;
}
return 0;
}
return 1;
default:
return 0;
}
}
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