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 */
1.5.8