Mercurial > hg > forks > libbpg
comparison libavutil/cast5.h @ 0:772086c29cc7
Initial import.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 16 Nov 2016 11:16:33 +0200 |
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-1:000000000000 | 0:772086c29cc7 |
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1 /* | |
2 * An implementation of the CAST128 algorithm as mentioned in RFC2144 | |
3 * Copyright (c) 2014 Supraja Meedinti | |
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 #ifndef AVUTIL_CAST5_H | |
23 #define AVUTIL_CAST5_H | |
24 | |
25 #include <stdint.h> | |
26 | |
27 | |
28 /** | |
29 * @file | |
30 * @brief Public header for libavutil CAST5 algorithm | |
31 * @defgroup lavu_cast5 CAST5 | |
32 * @ingroup lavu_crypto | |
33 * @{ | |
34 */ | |
35 | |
36 extern const int av_cast5_size; | |
37 | |
38 struct AVCAST5; | |
39 | |
40 /** | |
41 * Allocate an AVCAST5 context | |
42 * To free the struct: av_free(ptr) | |
43 */ | |
44 struct AVCAST5 *av_cast5_alloc(void); | |
45 /** | |
46 * Initialize an AVCAST5 context. | |
47 * | |
48 * @param ctx an AVCAST5 context | |
49 * @param key a key of 5,6,...16 bytes used for encryption/decryption | |
50 * @param key_bits number of keybits: possible are 40,48,...,128 | |
51 */ | |
52 int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits); | |
53 | |
54 /** | |
55 * Encrypt or decrypt a buffer using a previously initialized context | |
56 * | |
57 * @param ctx an AVCAST5 context | |
58 * @param dst destination array, can be equal to src | |
59 * @param src source array, can be equal to dst | |
60 * @param count number of 8 byte blocks | |
61 * @param decrypt 0 for encryption, 1 for decryption | |
62 */ | |
63 void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count,int decrypt); | |
64 /** | |
65 * @} | |
66 */ | |
67 #endif /* AVUTIL_CAST5_H */ |