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libavutil
rc4.h
Go to the documentation of this file.
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/*
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* RC4 encryption/decryption/pseudo-random number generator
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_RC4_H
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#define AVUTIL_RC4_H
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#include <stdint.h>
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struct
AVRC4
{
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uint8_t
state
[256];
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int
x
,
y
;
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};
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/**
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* @brief Initializes an AVRC4 context.
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*
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* @param key_bits must be a multiple of 8
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* @param decrypt 0 for encryption, 1 for decryption, currently has no effect
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*/
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int
av_rc4_init
(
struct
AVRC4
*d,
const
uint8_t
*key,
int
key_bits,
int
decrypt);
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/**
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* @brief Encrypts / decrypts using the RC4 algorithm.
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*
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* @param count number of bytes
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* @param dst destination array, can be equal to src
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* @param src source array, can be equal to dst, may be NULL
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* @param iv not (yet) used for RC4, should be NULL
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* @param decrypt 0 for encryption, 1 for decryption, not (yet) used
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*/
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void
av_rc4_crypt
(
struct
AVRC4
*d,
uint8_t
*dst,
const
uint8_t
*
src
,
int
count
,
uint8_t
*iv,
int
decrypt);
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#endif
/* AVUTIL_RC4_H */
av_rc4_crypt
void av_rc4_crypt(AVRC4 *r, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypts / decrypts using the RC4 algorithm.
Definition:
rc4.c:50
AVRC4::x
int x
Definition:
rc4.h:28
uint8_t
uint8_t
Definition:
audio_convert.c:194
AVRC4::y
int y
Definition:
rc4.h:28
AVRC4
Definition:
rc4.h:26
src
AVS_Value src
Definition:
avisynth_c.h:523
AVRC4::state
uint8_t state[256]
Definition:
rc4.h:27
av_rc4_init
int av_rc4_init(AVRC4 *r, const uint8_t *key, int key_bits, int decrypt)
Initializes an AVRC4 context.
Definition:
rc4.c:29
count
void INT64 INT64 count
Definition:
avisynth_c.h:594
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