4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVUTIL_BLOWFISH_H
22 #define AVUTIL_BLOWFISH_H
27 * @defgroup lavu_blowfish Blowfish
28 * @ingroup lavu_crypto
32 #define AV_BF_ROUNDS 16
34 typedef struct AVBlowfish {
35 uint32_t p[AV_BF_ROUNDS + 2];
40 * Initialize an AVBlowfish context.
42 * @param ctx an AVBlowfish context
44 * @param key_len length of the key
46 void av_blowfish_init(struct AVBlowfish *ctx, const uint8_t *key, int key_len);
49 * Encrypt or decrypt a buffer using a previously initialized context.
51 * @param ctx an AVBlowfish context
52 * @param xl left four bytes halves of input to be encrypted
53 * @param xr right four bytes halves of input to be encrypted
54 * @param decrypt 0 for encryption, 1 for decryption
56 void av_blowfish_crypt_ecb(struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
60 * Encrypt or decrypt a buffer using a previously initialized context.
62 * @param ctx an AVBlowfish context
63 * @param dst destination array, can be equal to src
64 * @param src source array, can be equal to dst
65 * @param count number of 8 byte blocks
66 * @param iv initialization vector for CBC mode, if NULL ECB will be used
67 * @param decrypt 0 for encryption, 1 for decryption
69 void av_blowfish_crypt(struct AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
70 int count, uint8_t *iv, int decrypt);
76 #endif /* AVUTIL_BLOWFISH_H */