yading@11: /*
yading@11:  * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVUTIL_AES_H
yading@11: #define AVUTIL_AES_H
yading@11: 
yading@11: #include <stdint.h>
yading@11: 
yading@11: #include "attributes.h"
yading@11: #include "version.h"
yading@11: 
yading@11: /**
yading@11:  * @defgroup lavu_aes AES
yading@11:  * @ingroup lavu_crypto
yading@11:  * @{
yading@11:  */
yading@11: 
yading@11: extern const int av_aes_size;
yading@11: 
yading@11: struct AVAES;
yading@11: 
yading@11: /**
yading@11:  * Allocate an AVAES context.
yading@11:  */
yading@11: struct AVAES *av_aes_alloc(void);
yading@11: 
yading@11: /**
yading@11:  * Initialize an AVAES context.
yading@11:  * @param key_bits 128, 192 or 256
yading@11:  * @param decrypt 0 for encryption, 1 for decryption
yading@11:  */
yading@11: int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
yading@11: 
yading@11: /**
yading@11:  * Encrypt or decrypt a buffer using a previously initialized context.
yading@11:  * @param count number of 16 byte blocks
yading@11:  * @param dst destination array, can be equal to src
yading@11:  * @param src source array, can be equal to dst
yading@11:  * @param iv initialization vector for CBC mode, if NULL then ECB will be used
yading@11:  * @param decrypt 0 for encryption, 1 for decryption
yading@11:  */
yading@11: void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
yading@11: 
yading@11: /**
yading@11:  * @}
yading@11:  */
yading@11: 
yading@11: #endif /* AVUTIL_AES_H */