5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2000 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 #ifndef RC5_INTERNAL_H
21 #define RC5_INTERNAL_H
23 #include "ciphers_def.h"
26 #define w 32 /* word size, in bits */
27 #define r 16 /* rounds */
28 #define b 16 /* minimum key size in bytes */
29 #define c 8 /* same for 128, 192 and 256 bits key */
30 #define t 34 /* size of table S, t = 2 * (r + 1) */
32 /* Cipher's context */
38 int rc5_set_key(RC5Context *ctx, const SilcUInt32 in_key[], int key_len);
39 int rc5_encrypt(RC5Context *ctx, u32 *in, u32 *out);
40 int rc5_decrypt(RC5Context *ctx, u32 *in, u32 *out);