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 module ffmpeg.libavutil.cast5; 22 extern (C) @nogc nothrow: 23 24 /** 25 * @file 26 * @brief Public header for libavutil CAST5 algorithm 27 * @defgroup lavu_cast5 CAST5 28 * @ingroup lavu_crypto 29 * @{ 30 */ 31 32 extern __gshared const int av_cast5_size; 33 34 struct AVCAST5; 35 36 /** 37 * Allocate an AVCAST5 context 38 * To free the struct: av_free(ptr) 39 */ 40 AVCAST5* av_cast5_alloc (); 41 /** 42 * Initialize an AVCAST5 context. 43 * 44 * @param ctx an AVCAST5 context 45 * @param key a key of 5,6,...16 bytes used for encryption/decryption 46 * @param key_bits number of keybits: possible are 40,48,...,128 47 * @return 0 on success, less than 0 on failure 48 */ 49 int av_cast5_init (AVCAST5* ctx, const(ubyte)* key, int key_bits); 50 51 /** 52 * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only 53 * 54 * @param ctx an AVCAST5 context 55 * @param dst destination array, can be equal to src 56 * @param src source array, can be equal to dst 57 * @param count number of 8 byte blocks 58 * @param decrypt 0 for encryption, 1 for decryption 59 */ 60 void av_cast5_crypt (AVCAST5* ctx, ubyte* dst, const(ubyte)* src, int count, int decrypt); 61 62 /** 63 * Encrypt or decrypt a buffer using a previously initialized context 64 * 65 * @param ctx an AVCAST5 context 66 * @param dst destination array, can be equal to src 67 * @param src source array, can be equal to dst 68 * @param count number of 8 byte blocks 69 * @param iv initialization vector for CBC mode, NULL for ECB mode 70 * @param decrypt 0 for encryption, 1 for decryption 71 */ 72 void av_cast5_crypt2 (AVCAST5* ctx, ubyte* dst, const(ubyte)* src, int count, ubyte* iv, int decrypt); 73 /** 74 * @} 75 */ 76 /* AVUTIL_CAST5_H */