1 /* 2 * copyright (c) 2007 Michael Niedermayer <michaelni (at) gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 #include "attributes.h" 27 #include "version.h" 28 29 /** 30 * @defgroup lavu_aes AES 31 * @ingroup lavu_crypto 32 * @{ 33 */ 34 35 extern const int av_aes_size; 36 37 struct AVAES; 38 39 /** 40 * Allocate an AVAES context. 41 */ 42 struct AVAES *av_aes_alloc(void); 43 44 /** 45 * Initialize an AVAES context. 46 * @param key_bits 128, 192 or 256 47 * @param decrypt 0 for encryption, 1 for decryption 48 */ 49 int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt); 50 51 /** 52 * Encrypt or decrypt a buffer using a previously initialized context. 53 * @param count number of 16 byte blocks 54 * @param dst destination array, can be equal to src 55 * @param src source array, can be equal to dst 56 * @param iv initialization vector for CBC mode, if NULL then ECB will be used 57 * @param decrypt 0 for encryption, 1 for decryption 58 */ 59 void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); 60 61 /** 62 * @} 63 */ 64 65 #endif /* AVUTIL_AES_H */ 66
