mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
/*
|
|
* DES encryption/decryption
|
|
* Copyright (c) 2007 Reimar Doeffinger
|
|
*
|
|
* 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_DES_H
|
|
#define AVUTIL_DES_H
|
|
|
|
#include <stdint.h>
|
|
|
|
struct AVDES {
|
|
uint64_t round_keys[3][16];
|
|
int triple_des;
|
|
};
|
|
|
|
/**
|
|
* \brief Initializes an AVDES context.
|
|
*
|
|
* \param key_bits must be 64 or 192
|
|
* \param decrypt 0 for encryption, 1 for decryption
|
|
*/
|
|
int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt);
|
|
|
|
/**
|
|
* \brief Encrypts / decrypts using the DES algorithm.
|
|
*
|
|
* \param count number of 8 byte blocks
|
|
* \param dst destination array, can be equal to src, must be 8-byte aligned
|
|
* \param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
|
|
* \param iv initialization vector for CBC mode, if NULL then ECB will be used,
|
|
* must be 8-byte aligned
|
|
* \param decrypt 0 for encryption, 1 for decryption
|
|
*/
|
|
void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
|
|
|
|
#endif /* AVUTIL_DES_H */
|