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/**********************************************************************
* md_gost.c *
* Copyright (c) 2005-2006 Cryptocom LTD *
* Copyright (c) 2020 Vitaly Chikunov <vt@altlinux.org> *
* 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);
GOST_digest GostR3411_94_digest = {
.nid = NID_id_GostR3411_94,
.result_size = 32,
.input_blocksize = 32,
.app_datasize = sizeof(struct ossl_gost_digest_ctx),
.init = gost_digest_init,
.update = gost_digest_update,
.final = gost_digest_final,
.copy = gost_digest_copy,
.cleanup = gost_digest_cleanup,
};
/*
* Single level template accessor.
* Note: that you cannot template 0 value.
*/
#define TPL(st,field) ( \
((st)->field) ? ((st)->field) : TPL_VAL(st,field) \
)
#define TPL_VAL(st,field) ( \
((st)->template ? (st)->template->field : 0) \
)
EVP_MD *GOST_init_digest(GOST_digest *d)
{
if (d->digest)
return d->digest;
EVP_MD *md;
if (!(md = EVP_MD_meth_new(d->nid, NID_undef))
|| !EVP_MD_meth_set_result_size(md, TPL(d, result_size))
|| !EVP_MD_meth_set_input_blocksize(md, TPL(d, input_blocksize))
|| !EVP_MD_meth_set_app_datasize(md, TPL(d, app_datasize))
|| !EVP_MD_meth_set_flags(md, d->flags | TPL_VAL(d, flags))
|| !EVP_MD_meth_set_init(md, TPL(d, init))
|| !EVP_MD_meth_set_update(md, TPL(d, update))
|| !EVP_MD_meth_set_final(md, TPL(d, final))
|| !EVP_MD_meth_set_copy(md, TPL(d, copy))
|| !EVP_MD_meth_set_cleanup(md, TPL(d, cleanup))
|| !EVP_MD_meth_set_ctrl(md, TPL(d, ctrl))) {
EVP_MD_meth_free(md);
md = NULL;
}
if (md && d->alias)
EVP_add_digest_alias(EVP_MD_name(md), d->alias);
d->digest = md;
return md;
}
void GOST_deinit_digest(GOST_digest *d)
{
if (d->alias)
EVP_delete_digest_alias(d->alias);
EVP_MD_meth_free(d->digest);
d->digest = NULL;
}
static int gost_digest_init(EVP_MD_CTX *ctx)
{
struct ossl_gost_digest_ctx *c = EVP_MD_CTX_md_data(ctx);
memset(&(c->dctx), 0, sizeof(gost_hash_ctx));
gost_init(&(c->cctx), &GostR3411_94_CryptoProParamSet);
c->dctx.cipher_ctx = &(c->cctx);
return 1;
}
static int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
return hash_block((gost_hash_ctx *) EVP_MD_CTX_md_data(ctx), data, count);
}
static int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
{
return finish_hash((gost_hash_ctx *) EVP_MD_CTX_md_data(ctx), md);
}
static int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
{
struct ossl_gost_digest_ctx *md_ctx = EVP_MD_CTX_md_data(to);
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(struct ossl_gost_digest_ctx));
md_ctx->dctx.cipher_ctx = &(md_ctx->cctx);
}
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), 0,
sizeof(struct ossl_gost_digest_ctx));
return 1;
}
/* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */
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