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/**********************************************************************
* gost_md2012.c *
* Copyright (c) 2013 Cryptocom LTD. *
* Copyright (c) 2020 Vitaly Chikunov <vt@altlinux.org> *
* 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"
#include "gost_lcl.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";
GOST_digest GostR3411_2012_template_digest = {
.input_blocksize = 64,
.app_datasize = sizeof(gost2012_hash_ctx),
.update = gost_digest_update,
.final = gost_digest_final,
.copy = gost_digest_copy,
.cleanup = gost_digest_cleanup,
};
GOST_digest GostR3411_2012_256_digest = {
.nid = NID_id_GostR3411_2012_256,
.alias = "streebog256",
.template = &GostR3411_2012_template_digest,
.result_size = 32,
.init = gost_digest_init256,
.ctrl = gost_digest_ctrl_256,
};
GOST_digest GostR3411_2012_512_digest = {
.nid = NID_id_GostR3411_2012_512,
.alias = "streebog512",
.template = &GostR3411_2012_template_digest,
.result_size = 64,
.init = gost_digest_init512,
.ctrl = gost_digest_ctrl_512,
};
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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