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comparison lib/libavutil/sha.h @ 2134:992d2e6f907d

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preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
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2133:e378232bfd36 2134:992d2e6f907d
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 */