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| | | /* |
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| | | * An implementation of the CAST128 algorithm as mentioned in RFC2144 |
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| | | * Copyright (c) 2014 Supraja Meedinti |
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| | | * |
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| | | * This file is part of FFmpeg. |
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| | | * |
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| | | * FFmpeg is free software; you can redistribute it and/or |
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| | | * modify it under the terms of the GNU Lesser General Public |
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| | | * License as published by the Free Software Foundation; either |
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| | | * version 2.1 of the License, or (at your option) any later version. |
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| | | * |
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| | | * FFmpeg is distributed in the hope that it will be useful, |
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| | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| | | * Lesser General Public License for more details. |
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| | | * |
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| | | * You should have received a copy of the GNU Lesser General Public |
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| | | * License along with FFmpeg; if not, write to the Free Software |
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| | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| | | */ |
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| | | |
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| | | #ifndef AVUTIL_CAST5_H |
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| | | #define AVUTIL_CAST5_H |
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| | | |
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| | | #include <stdint.h> |
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| | | |
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| | | |
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| | | /** |
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| | | * @file |
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| | | * @brief Public header for libavutil CAST5 algorithm |
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| | | * @defgroup lavu_cast5 CAST5 |
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| | | * @ingroup lavu_crypto |
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| | | * @{ |
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| | | */ |
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| | | |
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| | | extern const int av_cast5_size; |
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| | | |
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| | | struct AVCAST5; |
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| | | |
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| | | /** |
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| | | * Allocate an AVCAST5 context |
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| | | * To free the struct: av_free(ptr) |
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| | | */ |
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| | | struct AVCAST5 *av_cast5_alloc(void); |
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| | | /** |
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| | | * Initialize an AVCAST5 context. |
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| | | * |
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| | | * @param ctx an AVCAST5 context |
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| | | * @param key a key of 5,6,...16 bytes used for encryption/decryption |
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| | | * @param key_bits number of keybits: possible are 40,48,...,128 |
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| | | * @return 0 on success, less than 0 on failure |
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| | | */ |
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| | | int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits); |
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| | | |
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| | | /** |
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| | | * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only |
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| | | * |
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| | | * @param ctx an AVCAST5 context |
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| | | * @param dst destination array, can be equal to src |
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| | | * @param src source array, can be equal to dst |
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| | | * @param count number of 8 byte blocks |
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| | | * @param decrypt 0 for encryption, 1 for decryption |
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| | | */ |
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| | | void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt); |
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| | | |
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| | | /** |
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| | | * Encrypt or decrypt a buffer using a previously initialized context |
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| | | * |
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| | | * @param ctx an AVCAST5 context |
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| | | * @param dst destination array, can be equal to src |
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| | | * @param src source array, can be equal to dst |
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| | | * @param count number of 8 byte blocks |
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| | | * @param iv initialization vector for CBC mode, NULL for ECB mode |
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| | | * @param decrypt 0 for encryption, 1 for decryption |
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| | | */ |
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| | | void av_cast5_crypt2(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); |
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| | | /** |
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| | | * @} |
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| | | */ |
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| | | #endif /* AVUTIL_CAST5_H */ |
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