1/*
2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#ifndef AVUTIL_SHA_H
22#define AVUTIL_SHA_H
23
24#include <stdint.h>
25
26/**
27 * @defgroup lavu_sha SHA
28 * @ingroup lavu_crypto
29 * @{
30 */
31
32extern const int av_sha_size;
33
34struct AVSHA;
35
36/**
37 * Initialize SHA-1 or SHA-2 hashing.
38 *
39 * @param context pointer to the function context (of size av_sha_size)
40 * @param bits    number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits)
41 * @return        zero if initialization succeeded, -1 otherwise
42 */
43int av_sha_init(struct AVSHA* context, int bits);
44
45/**
46 * Update hash value.
47 *
48 * @param context hash function context
49 * @param data    input data to update hash with
50 * @param len     input data length
51 */
52void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len);
53
54/**
55 * Finish hashing and output digest value.
56 *
57 * @param context hash function context
58 * @param digest  buffer where output digest value is stored
59 */
60void av_sha_final(struct AVSHA* context, uint8_t *digest);
61
62/**
63 * @}
64 */
65
66#endif /* AVUTIL_SHA_H */
67