2 * A 32-bit implementation of the XTEA algorithm
4 * This file is part of Libav.
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.
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.
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
28 * @brief Public header for libavutil XTEA algorithm
29 * @defgroup lavu_xtea XTEA
30 * @ingroup lavu_crypto
34 typedef struct AVXTEA {
39 * Initialize an AVXTEA context.
41 * @param ctx an AVXTEA context
42 * @param key a key of 16 bytes used for encryption/decryption
44 void av_xtea_init(struct AVXTEA *ctx, const uint8_t key[16]);
47 * Encrypt or decrypt a buffer using a previously initialized context.
49 * @param ctx an AVXTEA context
50 * @param dst destination array, can be equal to src
51 * @param src source array, can be equal to dst
52 * @param count number of 8 byte blocks
53 * @param iv initialization vector for CBC mode, if NULL then ECB will be used
54 * @param decrypt 0 for encryption, 1 for decryption
56 void av_xtea_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src,
57 int count, uint8_t *iv, int decrypt);
63 #endif /* AVUTIL_XTEA_H */