Updated version of gost engine.
[openssl.git] / engines / ccgost / gost_md.c
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, size_t count);
17 static int gost_digest_final(EVP_MD_CTX *ctx,unsigned char *md);
18 static int gost_digest_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from);
19 static int gost_digest_cleanup(EVP_MD_CTX *ctx);
20
21 EVP_MD digest_gost=  
22         {
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
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
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
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
60 int gost_digest_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from) 
61         {
62         memcpy(to->md_data,from->md_data,sizeof(struct ossl_gost_digest_ctx));
63         return 1;
64         }               
65
66 int gost_digest_cleanup(EVP_MD_CTX *ctx) 
67         {
68         memset(ctx->md_data,0,sizeof(struct ossl_gost_digest_ctx));
69         return 1;
70         }