89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
/**********************************************************************
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* md_gost.c *
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* Copyright (c) 2005-2006 Cryptocom LTD *
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* This file is distributed under the same license as OpenSSL *
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* *
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* OpenSSL interface to GOST R 34.11-94 hash functions *
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* Requires OpenSSL 0.9.9 for compilation *
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**********************************************************************/
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#include <string.h>
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#include "gost_lcl.h"
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#include "gosthash.h"
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#include "e_gost_err.h"
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/* implementation of GOST 34.11 hash function See gost_md.c*/
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static int gost_digest_init(EVP_MD_CTX *ctx);
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static int gost_digest_update(EVP_MD_CTX *ctx, const void *data,
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size_t count);
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static int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md);
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static int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
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static int gost_digest_cleanup(EVP_MD_CTX *ctx);
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static EVP_MD *_hidden_GostR3411_94_md = NULL;
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EVP_MD *digest_gost(void)
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{
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if (_hidden_GostR3411_94_md == NULL) {
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EVP_MD *md;
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if ((md = EVP_MD_meth_new(NID_id_GostR3411_94, NID_undef)) == NULL
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|| !EVP_MD_meth_set_result_size(md, 32)
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|| !EVP_MD_meth_set_input_blocksize(md, 32)
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|| !EVP_MD_meth_set_app_datasize(md,
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sizeof(struct ossl_gost_digest_ctx))
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|| !EVP_MD_meth_set_init(md, gost_digest_init)
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|| !EVP_MD_meth_set_update(md, gost_digest_update)
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|| !EVP_MD_meth_set_final(md, gost_digest_final)
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|| !EVP_MD_meth_set_copy(md, gost_digest_copy)
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|| !EVP_MD_meth_set_cleanup(md, gost_digest_cleanup)) {
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EVP_MD_meth_free(md);
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md = NULL;
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}
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_hidden_GostR3411_94_md = md;
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}
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return _hidden_GostR3411_94_md;
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}
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void digest_gost_destroy(void)
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{
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EVP_MD_meth_free(_hidden_GostR3411_94_md);
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_hidden_GostR3411_94_md = NULL;
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}
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int gost_digest_init(EVP_MD_CTX *ctx)
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{
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struct ossl_gost_digest_ctx *c = EVP_MD_CTX_md_data(ctx);
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memset(&(c->dctx), 0, sizeof(gost_hash_ctx));
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gost_init(&(c->cctx), &GostR3411_94_CryptoProParamSet);
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c->dctx.cipher_ctx = &(c->cctx);
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return 1;
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}
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int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
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{
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return hash_block((gost_hash_ctx *) EVP_MD_CTX_md_data(ctx), data, count);
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}
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int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
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{
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return finish_hash((gost_hash_ctx *) EVP_MD_CTX_md_data(ctx), md);
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}
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int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
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{
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struct ossl_gost_digest_ctx *md_ctx = EVP_MD_CTX_md_data(to);
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if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
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memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
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sizeof(struct ossl_gost_digest_ctx));
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md_ctx->dctx.cipher_ctx = &(md_ctx->cctx);
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}
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return 1;
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}
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int gost_digest_cleanup(EVP_MD_CTX *ctx)
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{
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if (EVP_MD_CTX_md_data(ctx))
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memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_digest_ctx));
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return 1;
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}
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