Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavutil / sha512.h
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1/*
2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2013 James Almer <jamrial@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVUTIL_SHA512_H
23#define AVUTIL_SHA512_H
24
25#include <stdint.h>
26
27#include "attributes.h"
28#include "version.h"
29
30/**
31 * @defgroup lavu_sha512 SHA512
32 * @ingroup lavu_crypto
33 * @{
34 */
35
36extern const int av_sha512_size;
37
38struct AVSHA512;
39
40/**
41 * Allocate an AVSHA512 context.
42 */
43struct AVSHA512 *av_sha512_alloc(void);
44
45/**
46 * Initialize SHA-2 512 hashing.
47 *
48 * @param context pointer to the function context (of size av_sha512_size)
49 * @param bits number of bits in digest (224, 256, 384 or 512 bits)
50 * @return zero if initialization succeeded, -1 otherwise
51 */
52int av_sha512_init(struct AVSHA512* context, int bits);
53
54/**
55 * Update hash value.
56 *
57 * @param context hash function context
58 * @param data input data to update hash with
59 * @param len input data length
60 */
61void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len);
62
63/**
64 * Finish hashing and output digest value.
65 *
66 * @param context hash function context
67 * @param digest buffer where output digest value is stored
68 */
69void av_sha512_final(struct AVSHA512* context, uint8_t *digest);
70
71/**
72 * @}
73 */
74
75#endif /* AVUTIL_SHA512_H */