aes.h (1711B)
1 /* 2 * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of Libav. 5 * 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. 10 * 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. 15 * 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 19 */ 20 21 #ifndef AVUTIL_AES_H 22 #define AVUTIL_AES_H 23 24 #include <stdint.h> 25 26 /** 27 * @defgroup lavu_aes AES 28 * @ingroup lavu_crypto 29 * @{ 30 */ 31 32 extern const int av_aes_size; 33 34 struct AVAES; 35 36 /** 37 * Initialize an AVAES context. 38 * @param key_bits 128, 192 or 256 39 * @param decrypt 0 for encryption, 1 for decryption 40 */ 41 int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt); 42 43 /** 44 * Encrypt or decrypt a buffer using a previously initialized context. 45 * @param count number of 16 byte blocks 46 * @param dst destination array, can be equal to src 47 * @param src source array, can be equal to dst 48 * @param iv initialization vector for CBC mode, if NULL then ECB will be used 49 * @param decrypt 0 for encryption, 1 for decryption 50 */ 51 void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); 52 53 /** 54 * @} 55 */ 56 57 #endif /* AVUTIL_AES_H */