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039e9fe01c
* qatar/master: (29 commits) lavfi: reclassify showfiltfmts as a TESTPROG graph2dot: fix printf format specifier swscale: yuv2planeX 8bit >=sse2 functions need aligned stack on x86-32. vp8: loopfilter >=sse2 functions need aligned stack on x86-32. amr: remove shift out of the AMR_BIT() macro. dsputilenc: group yasm and inline asm function pointer assignment. mov: use forward declaration of a function instead of a table. Clarify Doxygen comment for FF_API_* #defines. configure: simplify get_version() Create version.h headers for libraries that lack them gitignore: Use full path instead of relative path to specify patterns mpegvideo: remove VLAs Add XTEA encryption support in libavutil Add Blowfish encryption support in libavutil eval: Add the isinf() function and tests for it flacdec: move lpc filter to flacdsp flacdec: split off channel decorrelation as flacdsp avplay: Add an option for not limiting the input buffer size FATE: add a test for WMA cover art. FATE: add a test for apetag cover art ... Conflicts: .gitignore configure ffplay.c libavcodec/Makefile libavcodec/error_resilience.c libavcodec/mpegvideo.c libavcodec/ratecontrol.c libavdevice/avdevice.h libavfilter/Makefile libavfilter/filtfmts.c libavfilter/version.h libavformat/mov.c libavformat/version.h libavutil/Makefile libavutil/avutil.h libavutil/version.h libswscale/swscale.h libswscale/x86/swscale_mmx.c tests/fate/libavutil.mak tests/lavfi-regression.sh tools/graph2dot.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
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* Blowfish algorithm
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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_BLOWFISH_H
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#define AVUTIL_BLOWFISH_H
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#include <stdint.h>
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/**
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* @defgroup lavu_blowfish Blowfish
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* @ingroup lavu_crypto
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* @{
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*/
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#define AV_BF_ROUNDS 16
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typedef struct AVBlowfish {
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uint32_t p[AV_BF_ROUNDS + 2];
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uint32_t s[4][256];
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} AVBlowfish;
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/**
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* Initialize an AVBlowfish context.
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*
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* @param ctx an AVBlowfish context
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* @param key a key
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* @param key_len length of the key
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*/
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void av_blowfish_init(struct AVBlowfish *ctx, const uint8_t *key, int key_len);
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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 AVBlowfish context
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* @param xl left four bytes halves of input to be encrypted
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* @param xr right four bytes halves of input to be encrypted
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* @param decrypt 0 for encryption, 1 for decryption
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*/
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void av_blowfish_crypt_ecb(struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
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int decrypt);
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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 AVBlowfish 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 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_blowfish_crypt(struct AVBlowfish *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_BLOWFISH_H */
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