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1 | /* |
2 | * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; 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 | #include "attributes.h" | |
27 | #include "version.h" | |
28 | ||
29 | /** | |
30 | * @defgroup lavu_sha SHA | |
31 | * @ingroup lavu_crypto | |
32 | * @{ | |
33 | */ | |
34 | ||
35 | extern const int av_sha_size; | |
36 | ||
37 | struct AVSHA; | |
38 | ||
39 | /** | |
40 | * Allocate an AVSHA context. | |
41 | */ | |
42 | struct AVSHA *av_sha_alloc(void); | |
43 | ||
44 | /** | |
45 | * Initialize SHA-1 or SHA-2 hashing. | |
46 | * | |
47 | * @param context pointer to the function context (of size av_sha_size) | |
48 | * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits) | |
49 | * @return zero if initialization succeeded, -1 otherwise | |
50 | */ | |
51 | int av_sha_init(struct AVSHA* context, int bits); | |
52 | ||
53 | /** | |
54 | * Update hash value. | |
55 | * | |
56 | * @param context hash function context | |
57 | * @param data input data to update hash with | |
58 | * @param len input data length | |
59 | */ | |
60 | void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len); | |
61 | ||
62 | /** | |
63 | * Finish hashing and output digest value. | |
64 | * | |
65 | * @param context hash function context | |
66 | * @param digest buffer where output digest value is stored | |
67 | */ | |
68 | void av_sha_final(struct AVSHA* context, uint8_t *digest); | |
69 | ||
70 | /** | |
71 | * @} | |
72 | */ | |
73 | ||
74 | #endif /* AVUTIL_SHA_H */ |