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| /* | |
| * An implementation of the CAST128 algorithm as mentioned in RFC2144 | |
| * Copyright (c) 2014 Supraja Meedinti | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| /** | |
| * @file | |
| * @brief Public header for libavutil CAST5 algorithm | |
| * @defgroup lavu_cast5 CAST5 | |
| * @ingroup lavu_crypto | |
| * @{ | |
| */ | |
| extern const int av_cast5_size; | |
| struct AVCAST5; | |
| /** | |
| * Allocate an AVCAST5 context | |
| * To free the struct: av_free(ptr) | |
| */ | |
| struct AVCAST5 *av_cast5_alloc(void); | |
| /** | |
| * Initialize an AVCAST5 context. | |
| * | |
| * @param ctx an AVCAST5 context | |
| * @param key a key of 5,6,...16 bytes used for encryption/decryption | |
| * @param key_bits number of keybits: possible are 40,48,...,128 | |
| * @return 0 on success, less than 0 on failure | |
| */ | |
| int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits); | |
| /** | |
| * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only | |
| * | |
| * @param ctx an AVCAST5 context | |
| * @param dst destination array, can be equal to src | |
| * @param src source array, can be equal to dst | |
| * @param count number of 8 byte blocks | |
| * @param decrypt 0 for encryption, 1 for decryption | |
| */ | |
| void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt); | |
| /** | |
| * Encrypt or decrypt a buffer using a previously initialized context | |
| * | |
| * @param ctx an AVCAST5 context | |
| * @param dst destination array, can be equal to src | |
| * @param src source array, can be equal to dst | |
| * @param count number of 8 byte blocks | |
| * @param iv initialization vector for CBC mode, NULL for ECB mode | |
| * @param decrypt 0 for encryption, 1 for decryption | |
| */ | |
| void av_cast5_crypt2(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); | |
| /** | |
| * @} | |
| */ | |