hevc: Add names for reserved NAL unit types
[libav.git] / libavutil / sha.h
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 <stddef.h>
25 #include <stdint.h>
26
27 #include "attributes.h"
28 #include "version.h"
29
30 /**
31 * @defgroup lavu_sha SHA
32 * @ingroup lavu_crypto
33 * @{
34 */
35
36 struct AVSHA;
37
38 /**
39 * Allocate an AVSHA context.
40 */
41 struct AVSHA *av_sha_alloc(void);
42
43 /**
44 * Initialize SHA-1 or SHA-2 hashing.
45 *
46 * @param context pointer to the function context (of size av_sha_size)
47 * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits)
48 * @return zero if initialization succeeded, -1 otherwise
49 */
50 int av_sha_init(struct AVSHA* context, int bits);
51
52 /**
53 * Update hash value.
54 *
55 * @param ctx hash function context
56 * @param data input data to update hash with
57 * @param len input data length
58 */
59 #if FF_API_CRYPTO_SIZE_T
60 void av_sha_update(struct AVSHA *ctx, const uint8_t *data, unsigned int len);
61 #else
62 void av_sha_update(struct AVSHA *ctx, const uint8_t *data, size_t len);
63 #endif
64
65 /**
66 * Finish hashing and output digest value.
67 *
68 * @param context hash function context
69 * @param digest buffer where output digest value is stored
70 */
71 void av_sha_final(struct AVSHA* context, uint8_t *digest);
72
73 /**
74 * @}
75 */
76
77 #endif /* AVUTIL_SHA_H */