1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
* Copyright (C) 2013 James Almer <jamrial@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @ingroup lavu_sha512
* Public header for SHA-512 implementation.
*/
#ifndef AVUTIL_SHA512_H
#define AVUTIL_SHA512_H
#include <stddef.h>
#include <stdint.h>
#include "attributes.h"
/**
* @defgroup lavu_sha512 SHA-512
* @ingroup lavu_hash
* SHA-512 (Secure Hash Algorithm) hash function implementations.
*
* This module supports the following SHA-2 hash functions:
*
* - SHA-512/224: 224 bits
* - SHA-512/256: 256 bits
* - SHA-384: 384 bits
* - SHA-512: 512 bits
*
* @see For SHA-1, SHA-256, and variants thereof, see @ref lavu_sha.
*
* @{
*/
extern const int av_sha512_size;
struct AVSHA512;
/**
* Allocate an AVSHA512 context.
*/
struct AVSHA512 *av_sha512_alloc(void);
/**
* Initialize SHA-2 512 hashing.
*
* @param context pointer to the function context (of size av_sha512_size)
* @param bits number of bits in digest (224, 256, 384 or 512 bits)
* @return zero if initialization succeeded, -1 otherwise
*/
int av_sha512_init(struct AVSHA512* context, int bits);
/**
* Update hash value.
*
* @param context hash function context
* @param data input data to update hash with
* @param len input data length
*/
void av_sha512_update(struct AVSHA512* context, const uint8_t* data, size_t len);
/**
* Finish hashing and output digest value.
*
* @param context hash function context
* @param digest buffer where output digest value is stored
*/
void av_sha512_final(struct AVSHA512* context, uint8_t *digest);
/**
* @}
*/
#endif /* AVUTIL_SHA512_H */
|
