FFmpeg  4.0
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 
54 extern const int av_sha512_size;
55 
56 struct AVSHA512;
57 
58 /**
59  * Allocate an AVSHA512 context.
60  */
61 struct 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  */
70 int 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
80 void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len);
81 #else
82 void 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  */
91 void av_sha512_final(struct AVSHA512* context, uint8_t *digest);
92 
93 /**
94  * @}
95  */
96 
97 #endif /* AVUTIL_SHA512_H */
hash context
Definition: sha512.c:34
Macro definitions for various function/variable attributes.
uint8_t
const char data[16]
Definition: mxf.c:90
const int av_sha512_size
Definition: sha512.c:41
struct AVSHA512 * av_sha512_alloc(void)
Allocate an AVSHA512 context.
Definition: sha512.c:43
Libavutil version macros.
void av_sha512_update(struct AVSHA512 *context, const uint8_t *data, unsigned int len)
Update hash value.
Definition: sha512.c:243
int av_sha512_init(struct AVSHA512 *context, int bits)
Initialize SHA-2 512 hashing.
Definition: sha512.c:191
int len
void av_sha512_final(struct AVSHA512 *context, uint8_t *digest)
Finish hashing and output digest value.
Definition: sha512.c:273