2 * A 32-bit implementation of the XTEA algorithm
3 * Copyright (c) 2012 Samuel Pitoiset
5 * This file is part of FFmpeg.
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.
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.
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
30 * @brief Public header for libavutil XTEA algorithm
31 * @defgroup lavu_xtea XTEA
32 * @ingroup lavu_crypto
36 #if FF_API_CRYPTO_CONTEXT
37 typedef struct AVXTEA {
41 typedef struct AVXTEA AVXTEA;
45 * Allocate an AVXTEA context.
47 AVXTEA *av_xtea_alloc(void);
50 * Initialize an AVXTEA context.
52 * @param ctx an AVXTEA context
53 * @param key a key of 16 bytes used for encryption/decryption
55 void av_xtea_init(struct AVXTEA *ctx, const uint8_t key[16]);
58 * Encrypt or decrypt a buffer using a previously initialized context.
60 * @param ctx an AVXTEA context
61 * @param dst destination array, can be equal to src
62 * @param src source array, can be equal to dst
63 * @param count number of 8 byte blocks
64 * @param iv initialization vector for CBC mode, if NULL then ECB will be used
65 * @param decrypt 0 for encryption, 1 for decryption
67 void av_xtea_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src,
68 int count, uint8_t *iv, int decrypt);
74 #endif /* AVUTIL_XTEA_H */