1 /* 2 * An implementation of the CAST128 algorithm as mentioned in RFC2144 3 * Copyright (c) 2014 Supraja Meedinti 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 module ffmpeg.libavutil.cast5; 23 24 extern (C): 25 import ffmpeg; @nogc nothrow: 26 27 /** 28 * @file 29 * @brief Public header for libavutil CAST5 algorithm 30 * @defgroup lavu_cast5 CAST5 31 * @ingroup lavu_crypto 32 * @{ 33 */ 34 35 extern __gshared const int av_cast5_size; 36 37 struct AVCAST5; 38 39 /** 40 * Allocate an AVCAST5 context 41 * To free the struct: av_free(ptr) 42 */ 43 AVCAST5* av_cast5_alloc (); 44 /** 45 * Initialize an AVCAST5 context. 46 * 47 * @param ctx an AVCAST5 context 48 * @param key a key of 5,6,...16 bytes used for encryption/decryption 49 * @param key_bits number of keybits: possible are 40,48,...,128 50 * @return 0 on success, less than 0 on failure 51 */ 52 int av_cast5_init (AVCAST5* ctx, const(ubyte)* key, int key_bits); 53 54 /** 55 * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only 56 * 57 * @param ctx an AVCAST5 context 58 * @param dst destination array, can be equal to src 59 * @param src source array, can be equal to dst 60 * @param count number of 8 byte blocks 61 * @param decrypt 0 for encryption, 1 for decryption 62 */ 63 void av_cast5_crypt (AVCAST5* ctx, ubyte* dst, const(ubyte)* src, int count, int decrypt); 64 65 /** 66 * Encrypt or decrypt a buffer using a previously initialized context 67 * 68 * @param ctx an AVCAST5 context 69 * @param dst destination array, can be equal to src 70 * @param src source array, can be equal to dst 71 * @param count number of 8 byte blocks 72 * @param iv initialization vector for CBC mode, NULL for ECB mode 73 * @param decrypt 0 for encryption, 1 for decryption 74 */ 75 void av_cast5_crypt2 (AVCAST5* ctx, ubyte* dst, const(ubyte)* src, int count, ubyte* iv, int decrypt); 76 /** 77 * @} 78 */ 79 /* AVUTIL_CAST5_H */