Further comment amendments to preserve formatting prior to source reformat
[openssl.git] / engines / ccgost / gosthash.h
1 /**********************************************************************
2  *                          gosthash.h                                *
3  *             Copyright (c) 2005-2006 Cryptocom LTD                  *
4  *       This file is distributed under the same license as OpenSSL   *
5  *                                                                    *
6  *    Declaration of GOST R 34.11-94 hash functions                   *
7  *       uses  and gost89.h Doesn't need OpenSSL                      *
8  **********************************************************************/
9 #ifndef GOSTHASH_H
10 #define GOSTHASH_H
11 #include "gost89.h"
12 #include <stdlib.h>
13
14 #if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
15 typedef __int64 ghosthash_len;
16 #elif defined(__arch64__)
17 typedef long ghosthash_len;
18 #else
19 typedef long long ghosthash_len;
20 #endif
21
22 typedef struct gost_hash_ctx {
23                 ghosthash_len len;
24                 gost_ctx *cipher_ctx;
25                 int left;
26                 byte H[32];
27                 byte S[32];
28                 byte remainder[32];
29 } gost_hash_ctx;                
30
31
32 /* Initalizes gost hash ctx, including creation of gost cipher ctx */
33
34 int init_gost_hash_ctx(gost_hash_ctx *ctx, const gost_subst_block *subst_block);
35 void done_gost_hash_ctx(gost_hash_ctx *ctx);
36
37 /* Cleans up all fields, except cipher ctx preparing ctx for computing
38  * of new hash value */
39 int start_hash(gost_hash_ctx *ctx);
40
41 /* Hashes block of data */
42 int hash_block(gost_hash_ctx *ctx, const byte *block, size_t length);
43
44 /* Finalizes computation of hash  and fills buffer (which should be at
45  * least 32 bytes long) with value of computed hash. */
46 int finish_hash(gost_hash_ctx *ctx, byte *hashval);
47
48 #endif