| /* |
| * A 32-bit implementation of the XTEA algorithm |
| * |
| * This file is part of Libav. |
| * |
| * Libav is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * Libav is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with Libav; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef AVUTIL_XTEA_H |
| #define AVUTIL_XTEA_H |
| |
| #include <stdint.h> |
| |
| /** |
| * @defgroup lavu_xtea XTEA |
| * @ingroup lavu_crypto |
| * @{ |
| */ |
| |
| typedef struct AVXTEA { |
| uint32_t key[16]; |
| } AVXTEA; |
| |
| /** |
| * Initialize an AVXTEA context. |
| * |
| * @param ctx an AVXTEA context |
| * @param key a key of 16 bytes used for encryption/decryption |
| */ |
| void av_xtea_init(struct AVXTEA *ctx, const uint8_t key[16]); |
| |
| /** |
| * Encrypt or decrypt a buffer using a previously initialized context. |
| * |
| * @param ctx an AVXTEA context |
| * @param dst destination array, can be equal to src |
| * @param src source array, can be equal to dst |
| * @param count number of 8 byte blocks |
| * @param iv initialization vector for CBC mode, if NULL then ECB will be used |
| * @param decrypt 0 for encryption, 1 for decryption |
| */ |
| void av_xtea_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src, |
| int count, uint8_t *iv, int decrypt); |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* AVUTIL_XTEA_H */ |
