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686959e87e
* qatar/master: doxygen: Consistently use '@' instead of '\' for Doxygen markup. Use av_printf_format to check the usage of printf style functions Add av_printf_format, for marking printf style format strings and their parameters ARM: enable thumb for Cortex-M* CPUs nsvdec: Propagate error values instead of returning 0 in nsv_read_header(). build: remove SRC_PATH_BARE variable build: move basic rules and variables to main Makefile build: move special targets to end of main Makefile lavdev: improve feedback in case of invalid frame rate/size vfwcap: prefer "framerate_q" over "fps" in vfw_read_header() v4l2: prefer "framerate_q" over "fps" in v4l2_set_parameters() fbdev: prefer "framerate_q" over "fps" in device context bktr: prefer "framerate" over "fps" for grab_read_header() ALSA: implement channel layout for playback. alsa: support unsigned variants of already supported signed formats. alsa: add support for more formats. ARM: allow building in Thumb2 mode Conflicts: common.mak doc/APIchanges libavcodec/vdpau.h libavdevice/alsa-audio-common.c libavdevice/fbdev.c libavdevice/libdc1394.c libavutil/avutil.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
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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 */
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