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libavutil/rc4.h

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00001 /*
00002  * RC4 encryption/decryption/pseudo-random number generator
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #ifndef AVUTIL_RC4_H
00022 #define AVUTIL_RC4_H
00023 
00024 #include <stdint.h>
00025 
00026 struct AVRC4 {
00027     uint8_t state[256];
00028     int x, y;
00029 };
00030 
00037 int av_rc4_init(struct AVRC4 *d, const uint8_t *key, int key_bits, int decrypt);
00038 
00048 void av_rc4_crypt(struct AVRC4 *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
00049 
00050 #endif /* AVUTIL_RC4_H */

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