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/*
* An implementation of the CAMELLIA algorithm as mentioned in RFC3713
* Copyright (c) 2014 Supraja Meedinti
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_CAMELLIA_H
#define AVUTIL_CAMELLIA_H
#include <stdint.h>
/**
* @file
* @brief Public header for libavutil CAMELLIA algorithm
* @defgroup lavu_camellia CAMELLIA
* @ingroup lavu_crypto
* @{
*/
extern const int av_camellia_size;
struct AVCAMELLIA;
/**
* Allocate an AVCAMELLIA context
* To free the struct: av_free(ptr)
*/
struct AVCAMELLIA *av_camellia_alloc(void);
/**
* Initialize an AVCAMELLIA context.
*
* @param ctx an AVCAMELLIA context
* @param key a key of 16, 24, 32 bytes used for encryption/decryption
* @param key_bits number of keybits: possible are 128, 192, 256
*/
int av_camellia_init(struct AVCAMELLIA *ctx, const uint8_t *key, int key_bits);
/**
* Encrypt or decrypt a buffer using a previously initialized context
*
* @param ctx an AVCAMELLIA context
* @param dst destination array, can be equal to src
* @param src source array, can be equal to dst
* @param count number of 16 byte blocks
* @paran iv initialization vector for CBC mode, NULL for ECB mode
* @param decrypt 0 for encryption, 1 for decryption
*/
void av_camellia_crypt(struct AVCAMELLIA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt);
/**
* @}
*/
#endif /* AVUTIL_CAMELLIA_H */