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libavutil
xtea.h
Go to the documentation of this file.
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/*
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* A 32-bit implementation of the XTEA algorithm
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* Copyright (c) 2012 Samuel Pitoiset
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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_XTEA_H
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#define AVUTIL_XTEA_H
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#include <stdint.h>
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/**
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* @file
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* @brief Public header for libavutil XTEA algorithm
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* @defgroup lavu_xtea XTEA
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* @ingroup lavu_crypto
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* @{
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*/
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typedef
struct
AVXTEA
{
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uint32_t
key
[16];
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}
AVXTEA
;
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/**
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* Initialize an AVXTEA context.
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*
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* @param ctx an AVXTEA context
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* @param key a key of 16 bytes used for encryption/decryption
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*/
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void
av_xtea_init
(
struct
AVXTEA
*ctx,
const
uint8_t
key[16]);
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/**
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* Encrypt or decrypt a buffer using a previously initialized context.
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*
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* @param ctx an AVXTEA context
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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
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* @param count number of 8 byte blocks
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* @param iv initialization vector for CBC mode, if NULL then ECB will be used
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* @param decrypt 0 for encryption, 1 for decryption
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*/
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void
av_xtea_crypt
(
struct
AVXTEA
*ctx,
uint8_t
*dst,
const
uint8_t
*
src
,
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int
count
,
uint8_t
*iv,
int
decrypt);
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/**
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* @}
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*/
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#endif
/* AVUTIL_XTEA_H */
AVXTEA::key
uint32_t key[16]
Definition:
xtea.h:36
uint8_t
uint8_t
Definition:
audio_convert.c:194
av_xtea_crypt
void av_xtea_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context.
Definition:
xtea.c:164
av_xtea_init
void av_xtea_init(struct AVXTEA *ctx, const uint8_t key[16])
Initialize an AVXTEA context.
Definition:
xtea.c:36
count
GLsizei count
Definition:
opengl_enc.c:109
src
AVS_Value src
Definition:
avisynth_c.h:482
AVXTEA
Definition:
xtea.h:35
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