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__)
15typedef __int64 ghosthash_len;
16#elif defined(__arch64__)
17typedef long ghosthash_len;
18#else
19typedef long long ghosthash_len;
20#endif
21
22typedef 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
34int init_gost_hash_ctx(gost_hash_ctx *ctx, const gost_subst_block *subst_block);
35void 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 */
39int start_hash(gost_hash_ctx *ctx);
40
41/* Hashes block of data */
42int 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. */
46int finish_hash(gost_hash_ctx *ctx, byte *hashval);
47
48#endif
49