mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-27 13:10:37 +00:00
6ad749b533
Signed-off-by: Supraja Meedinti <supraja0493@gmail.com> Reviewed-by: Giorgio Vazzana <mywing81@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/*
|
|
* An implementation of the TwoFish algorithm
|
|
* Copyright (c) 2015 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_TWOFISH_H
|
|
#define AVUTIL_TWOFISH_H
|
|
|
|
#include <stdint.h>
|
|
|
|
|
|
/**
|
|
* @file
|
|
* @brief Public header for libavutil TWOFISH algorithm
|
|
* @defgroup lavu_twofish TWOFISH
|
|
* @ingroup lavu_crypto
|
|
* @{
|
|
*/
|
|
|
|
extern const int av_twofish_size;
|
|
|
|
struct AVTWOFISH;
|
|
|
|
/**
|
|
* Allocate an AVTWOFISH context
|
|
* To free the struct: av_free(ptr)
|
|
*/
|
|
struct AVTWOFISH *av_twofish_alloc(void);
|
|
|
|
/**
|
|
* Initialize an AVTWOFISH context.
|
|
*
|
|
* @param ctx an AVTWOFISH context
|
|
* @param key a key of size ranging from 1 to 32 bytes used for encryption/decryption
|
|
* @param key_bits number of keybits: 128, 192, 256 If less than the required, padded with zeroes to nearest valid value; return value is 0 if key_bits is 128/192/256, -1 if less than 0, 1 otherwise
|
|
*/
|
|
int av_twofish_init(struct AVTWOFISH *ctx, const uint8_t *key, int key_bits);
|
|
|
|
/**
|
|
* Encrypt or decrypt a buffer using a previously initialized context
|
|
*
|
|
* @param ctx an AVTWOFISH 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_twofish_crypt(struct AVTWOFISH *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
#endif /* AVUTIL_TWOFISH_H */
|