Edit File: cast5.h
/* * 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 */ #ifndef AVUTIL_CAST5_H #define AVUTIL_CAST5_H #include <stdint.h> /** * @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 */ 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); /** * @} */ #endif /* AVUTIL_CAST5_H */