1 /* $OpenBSD: arc4.h,v 1.2 2007/07/24 19:35:20 damien Exp $ */
2 /*
3 * Copyright (c) 2003 Markus Friedl <markus@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #define RC4STATE 256
19 #define RC4KEYLEN 16
20
21 struct rc4_ctx {
22 u_int8_t x, y;
23 u_int8_t state[RC4STATE];
24 };
25
26 void rc4_keysetup(struct rc4_ctx *, u_char *, u_int32_t);
27 void rc4_crypt(struct rc4_ctx *, u_char *, u_char *, u_int32_t);
28 void rc4_skip(struct rc4_ctx *, u_int32_t);