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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";
static EVP_MD *_hidden_GostR3411_2012_256_md = NULL;
static EVP_MD *_hidden_GostR3411_2012_512_md = NULL;
EVP_MD *digest_gost2012_256(void)
{
if (_hidden_GostR3411_2012_256_md == NULL) {
EVP_MD *md;
if ((md =
EVP_MD_meth_new(NID_id_GostR3411_2012_256, NID_undef)) == NULL
|| !EVP_MD_meth_set_result_size(md, 32)
|| !EVP_MD_meth_set_input_blocksize(md, 64)
|| !EVP_MD_meth_set_app_datasize(md, sizeof(gost2012_hash_ctx))
|| !EVP_MD_meth_set_init(md, gost_digest_init256)
|| !EVP_MD_meth_set_update(md, gost_digest_update)
|| !EVP_MD_meth_set_final(md, gost_digest_final)
|| !EVP_MD_meth_set_copy(md, gost_digest_copy)
|| !EVP_MD_meth_set_ctrl(md, gost_digest_ctrl_256)
|| !EVP_MD_meth_set_cleanup(md, gost_digest_cleanup)) {
EVP_MD_meth_free(md);
md = NULL;
}
_hidden_GostR3411_2012_256_md = md;
}
return _hidden_GostR3411_2012_256_md;
}
void digest_gost2012_256_destroy(void)
{
EVP_MD_meth_free(_hidden_GostR3411_2012_256_md);
_hidden_GostR3411_2012_256_md = NULL;
}
EVP_MD *digest_gost2012_512(void)
{
if (_hidden_GostR3411_2012_512_md == NULL) {
EVP_MD *md;
if ((md =
EVP_MD_meth_new(NID_id_GostR3411_2012_512, NID_undef)) == NULL
|| !EVP_MD_meth_set_result_size(md, 64)
|| !EVP_MD_meth_set_input_blocksize(md, 64)
|| !EVP_MD_meth_set_app_datasize(md, sizeof(gost2012_hash_ctx))
|| !EVP_MD_meth_set_init(md, gost_digest_init512)
|| !EVP_MD_meth_set_update(md, gost_digest_update)
|| !EVP_MD_meth_set_final(md, gost_digest_final)
|| !EVP_MD_meth_set_copy(md, gost_digest_copy)
|| !EVP_MD_meth_set_ctrl(md, gost_digest_ctrl_512)
|| !EVP_MD_meth_set_cleanup(md, gost_digest_cleanup)) {
EVP_MD_meth_free(md);
md = NULL;
}
_hidden_GostR3411_2012_512_md = md;
}
return _hidden_GostR3411_2012_512_md;
}
void digest_gost2012_512_destroy(void)
{
EVP_MD_meth_free(_hidden_GostR3411_2012_512_md);
_hidden_GostR3411_2012_512_md = NULL;
}
static int gost_digest_init512(EVP_MD_CTX *ctx)
{
init_gost2012_hash_ctx((gost2012_hash_ctx *) EVP_MD_CTX_md_data(ctx),
512);
return 1;
}
static int gost_digest_init256(EVP_MD_CTX *ctx)
{
init_gost2012_hash_ctx((gost2012_hash_ctx *) EVP_MD_CTX_md_data(ctx),
256);
return 1;
}
static int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
gost2012_hash_block((gost2012_hash_ctx *) EVP_MD_CTX_md_data(ctx), data,
count);
return 1;
}
static int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
{
gost2012_finish_hash((gost2012_hash_ctx *) EVP_MD_CTX_md_data(ctx), md);
return 1;
}
static int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
{
if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from))
memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
sizeof(gost2012_hash_ctx));
return 1;
}
static int gost_digest_cleanup(EVP_MD_CTX *ctx)
{
if (EVP_MD_CTX_md_data(ctx))
memset(EVP_MD_CTX_md_data(ctx), 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;
}
}
default:
return 0;
}
}
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