|
1 /* |
|
2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> |
|
3 * |
|
4 * This file is part of Libav. |
|
5 * |
|
6 * Libav 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 * Libav 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 Libav; 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 #if FF_API_CONTEXT_SIZE |
|
36 extern attribute_deprecated const int av_sha_size; |
|
37 #endif |
|
38 |
|
39 struct AVSHA; |
|
40 |
|
41 /** |
|
42 * Allocate an AVSHA context. |
|
43 */ |
|
44 struct AVSHA *av_sha_alloc(void); |
|
45 |
|
46 /** |
|
47 * Initialize SHA-1 or SHA-2 hashing. |
|
48 * |
|
49 * @param context pointer to the function context (of size av_sha_size) |
|
50 * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits) |
|
51 * @return zero if initialization succeeded, -1 otherwise |
|
52 */ |
|
53 int av_sha_init(struct AVSHA* context, int bits); |
|
54 |
|
55 /** |
|
56 * Update hash value. |
|
57 * |
|
58 * @param context hash function context |
|
59 * @param data input data to update hash with |
|
60 * @param len input data length |
|
61 */ |
|
62 void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len); |
|
63 |
|
64 /** |
|
65 * Finish hashing and output digest value. |
|
66 * |
|
67 * @param context hash function context |
|
68 * @param digest buffer where output digest value is stored |
|
69 */ |
|
70 void av_sha_final(struct AVSHA* context, uint8_t *digest); |
|
71 |
|
72 /** |
|
73 * @} |
|
74 */ |
|
75 |
|
76 #endif /* AVUTIL_SHA_H */ |