repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| f6fa7814 DM |
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 */ |