repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * DES encryption/decryption | |
| 3 | * Copyright (c) 2007 Reimar Doeffinger | |
| 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_DES_H | |
| 23 | #define AVUTIL_DES_H | |
| 24 | ||
| 25 | #include <stdint.h> | |
| 26 | ||
| 27 | struct AVDES { | |
| 28 | uint64_t round_keys[3][16]; | |
| 29 | int triple_des; | |
| 30 | }; | |
| 31 | ||
| 32 | /** | |
| 33 | * @brief Initializes an AVDES context. | |
| 34 | * | |
| 35 | * @param key_bits must be 64 or 192 | |
| 36 | * @param decrypt 0 for encryption/CBC-MAC, 1 for decryption | |
| 37 | */ | |
| 38 | int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt); | |
| 39 | ||
| 40 | /** | |
| 41 | * @brief Encrypts / decrypts using the DES algorithm. | |
| 42 | * | |
| 43 | * @param count number of 8 byte blocks | |
| 44 | * @param dst destination array, can be equal to src, must be 8-byte aligned | |
| 45 | * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL | |
| 46 | * @param iv initialization vector for CBC mode, if NULL then ECB will be used, | |
| 47 | * must be 8-byte aligned | |
| 48 | * @param decrypt 0 for encryption, 1 for decryption | |
| 49 | */ | |
| 50 | void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); | |
| 51 | ||
| 52 | /** | |
| 53 | * @brief Calculates CBC-MAC using the DES algorithm. | |
| 54 | * | |
| 55 | * @param count number of 8 byte blocks | |
| 56 | * @param dst destination array, can be equal to src, must be 8-byte aligned | |
| 57 | * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL | |
| 58 | */ | |
| 59 | void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count); | |
| 60 | ||
| 61 | #endif /* AVUTIL_DES_H */ |