FFmpeg 4.2.2
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/**
23 * @file
24 * @ingroup lavu_sha512
25 * Public header for SHA-512 implementation.
26 */
27
28#ifndef AVUTIL_SHA512_H
29#define AVUTIL_SHA512_H
30
31#include <stddef.h>
32#include <stdint.h>
33
34#include "attributes.h"
35#include "version.h"
36
37/**
38 * @defgroup lavu_sha512 SHA-512
39 * @ingroup lavu_hash
40 * SHA-512 (Secure Hash Algorithm) hash function implementations.
41 *
42 * This module supports the following SHA-2 hash functions:
43 *
44 * - SHA-512/224: 224 bits
45 * - SHA-512/256: 256 bits
46 * - SHA-384: 384 bits
47 * - SHA-512: 512 bits
48 *
49 * @see For SHA-1, SHA-256, and variants thereof, see @ref lavu_sha.
50 *
51 * @{
52 */
53
54extern const int av_sha512_size;
55
56struct AVSHA512;
57
58/**
59 * Allocate an AVSHA512 context.
60 */
61struct AVSHA512 *av_sha512_alloc(void);
62
63/**
64 * Initialize SHA-2 512 hashing.
65 *
66 * @param context pointer to the function context (of size av_sha512_size)
67 * @param bits number of bits in digest (224, 256, 384 or 512 bits)
68 * @return zero if initialization succeeded, -1 otherwise
69 */
70int av_sha512_init(struct AVSHA512* context, int bits);
71
72/**
73 * Update hash value.
74 *
75 * @param context hash function context
76 * @param data input data to update hash with
77 * @param len input data length
78 */
79#if FF_API_CRYPTO_SIZE_T
80void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len);
81#else
82void av_sha512_update(struct AVSHA512* context, const uint8_t* data, size_t len);
83#endif
84
85/**
86 * Finish hashing and output digest value.
87 *
88 * @param context hash function context
89 * @param digest buffer where output digest value is stored
90 */
91void av_sha512_final(struct AVSHA512* context, uint8_t *digest);
92
93/**
94 * @}
95 */
96
97#endif /* AVUTIL_SHA512_H */
Macro definitions for various function/variable attributes.
void av_sha512_update(struct AVSHA512 *context, const uint8_t *data, unsigned int len)
Update hash value.
struct AVSHA512 * av_sha512_alloc(void)
Allocate an AVSHA512 context.
int av_sha512_init(struct AVSHA512 *context, int bits)
Initialize SHA-2 512 hashing.
void av_sha512_final(struct AVSHA512 *context, uint8_t *digest)
Finish hashing and output digest value.
const int av_sha512_size
swscale version macros