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3d1690b8c6
It's been argued that the benefits of the current implementation far outweight those of making the structs opaque. This deprecation is not present in any release, so it can be safely removed. Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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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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* Allocate an AVXTEA context.
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*/
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AVXTEA *av_xtea_alloc(void);
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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 */
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