1 /**********************************************************************
2 * md_gost.c *
3 * Copyright (c) 2005-2006 Cryptocom LTD *
4 * This file is distributed under the same license as OpenSSL *
5 * *
6 * OpenSSL interface to GOST R 34.11-94 hash functions *
7 * Requires OpenSSL 0.9.9 for compilation *
8 **********************************************************************/
9 #include <string.h>
10 #include "gost_lcl.h"
11 #include "gosthash.h"
12 #include "e_gost_err.h"
13
14 /* implementation of GOST 34.11 hash function See gost_md.c*/
15 static int gost_digest_init(EVP_MD_CTX *ctx);
16 static int gost_digest_update(EVP_MD_CTX *ctx, const void *data,
17 size_t count);
18 static int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md);
19 static int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
20 static int gost_digest_cleanup(EVP_MD_CTX *ctx);
21
22 EVP_MD digest_gost = {
23 NID_id_GostR3411_94,
24 NID_undef,
25 32,
26 EVP_MD_FLAG_PKEY_METHOD_SIGNATURE,
27 gost_digest_init,
28 gost_digest_update,
29 gost_digest_final,
30 gost_digest_copy,
31 gost_digest_cleanup,
32 NULL,
33 NULL,
34 {NID_undef, NID_undef, 0, 0, 0},
35 32,
36 sizeof(struct ossl_gost_digest_ctx),
37 NULL
38 };
39
gost_digest_init(EVP_MD_CTX * ctx)40 int gost_digest_init(EVP_MD_CTX *ctx)
41 {
42 struct ossl_gost_digest_ctx *c = ctx->md_data;
43 memset(&(c->dctx), 0, sizeof(gost_hash_ctx));
44 gost_init(&(c->cctx), &GostR3411_94_CryptoProParamSet);
45 c->dctx.cipher_ctx = &(c->cctx);
46 return 1;
47 }
48
gost_digest_update(EVP_MD_CTX * ctx,const void * data,size_t count)49 int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
50 {
51 return hash_block((gost_hash_ctx *) ctx->md_data, data, count);
52 }
53
gost_digest_final(EVP_MD_CTX * ctx,unsigned char * md)54 int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
55 {
56 return finish_hash((gost_hash_ctx *) ctx->md_data, md);
57
58 }
59
gost_digest_copy(EVP_MD_CTX * to,const EVP_MD_CTX * from)60 int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
61 {
62 struct ossl_gost_digest_ctx *md_ctx = to->md_data;
63 if (to->md_data && from->md_data) {
64 memcpy(to->md_data, from->md_data,
65 sizeof(struct ossl_gost_digest_ctx));
66 md_ctx->dctx.cipher_ctx = &(md_ctx->cctx);
67 }
68 return 1;
69 }
70
gost_digest_cleanup(EVP_MD_CTX * ctx)71 int gost_digest_cleanup(EVP_MD_CTX *ctx)
72 {
73 if (ctx->md_data)
74 memset(ctx->md_data, 0, sizeof(struct ossl_gost_digest_ctx));
75 return 1;
76 }
77