mirror of
https://github.com/libretro/dolphin
synced 2024-11-14 09:20:32 -05:00
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/*
|
|
* Blowfish algorithm
|
|
* Copyright (c) 2012 Samuel Pitoiset
|
|
*
|
|
* 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_BLOWFISH_H
|
|
#define AVUTIL_BLOWFISH_H
|
|
|
|
#include <stdint.h>
|
|
|
|
/**
|
|
* @defgroup lavu_blowfish Blowfish
|
|
* @ingroup lavu_crypto
|
|
* @{
|
|
*/
|
|
|
|
#define AV_BF_ROUNDS 16
|
|
|
|
typedef struct AVBlowfish {
|
|
uint32_t p[AV_BF_ROUNDS + 2];
|
|
uint32_t s[4][256];
|
|
} AVBlowfish;
|
|
|
|
/**
|
|
* Allocate an AVBlowfish context.
|
|
*/
|
|
AVBlowfish *av_blowfish_alloc(void);
|
|
|
|
/**
|
|
* Initialize an AVBlowfish context.
|
|
*
|
|
* @param ctx an AVBlowfish context
|
|
* @param key a key
|
|
* @param key_len length of the key
|
|
*/
|
|
void av_blowfish_init(struct AVBlowfish *ctx, const uint8_t *key, int key_len);
|
|
|
|
/**
|
|
* Encrypt or decrypt a buffer using a previously initialized context.
|
|
*
|
|
* @param ctx an AVBlowfish context
|
|
* @param xl left four bytes halves of input to be encrypted
|
|
* @param xr right four bytes halves of input to be encrypted
|
|
* @param decrypt 0 for encryption, 1 for decryption
|
|
*/
|
|
void av_blowfish_crypt_ecb(struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
|
|
int decrypt);
|
|
|
|
/**
|
|
* Encrypt or decrypt a buffer using a previously initialized context.
|
|
*
|
|
* @param ctx an AVBlowfish context
|
|
* @param dst destination array, can be equal to src
|
|
* @param src source array, can be equal to dst
|
|
* @param count number of 8 byte blocks
|
|
* @param iv initialization vector for CBC mode, if NULL ECB will be used
|
|
* @param decrypt 0 for encryption, 1 for decryption
|
|
*/
|
|
void av_blowfish_crypt(struct AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
|
|
int count, uint8_t *iv, int decrypt);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* AVUTIL_BLOWFISH_H */
|