aes.h (1882B)
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 #include "attributes.h" 27 #include "version.h" 28 29 /** 30 * @defgroup lavu_aes AES 31 * @ingroup lavu_crypto 32 * @{ 33 */ 34 35 #if FF_API_CONTEXT_SIZE 36 extern attribute_deprecated const int av_aes_size; 37 #endif 38 39 struct AVAES; 40 41 /** 42 * Allocate an AVAES context. 43 */ 44 struct AVAES *av_aes_alloc(void); 45 46 /** 47 * Initialize an AVAES context. 48 * @param key_bits 128, 192 or 256 49 * @param decrypt 0 for encryption, 1 for decryption 50 */ 51 int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt); 52 53 /** 54 * Encrypt or decrypt a buffer using a previously initialized context. 55 * @param count number of 16 byte blocks 56 * @param dst destination array, can be equal to src 57 * @param src source array, can be equal to dst 58 * @param iv initialization vector for CBC mode, if NULL then ECB will be used 59 * @param decrypt 0 for encryption, 1 for decryption 60 */ 61 void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); 62 63 /** 64 * @} 65 */ 66 67 #endif /* AVUTIL_AES_H */