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/* $FreeBSD$ */
/* $KAME: rc5.h,v 1.4 2000/06/14 10:41:17 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _RFC2040_RC5_H_
#define _RFC2040_RC5_H_
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
/*
* if RC5_WORD change, W also may be changed.
*/
typedef u_int32_t RC5_WORD;
#define W (32)
#define WW (W / 8)
#define ROT_MASK (W - 1)
#define BB ((2 * W) / 8)
#define SHLL(x, s) ((RC5_WORD)((x) << ((s)&ROT_MASK)))
#define SHLR(x, s, w) ((RC5_WORD)((x) >> ((w)-((s)&ROT_MASK))))
#define SHRL(x, s, w) ((RC5_WORD)((x) << ((w)-((s)&ROT_MASK))))
#define SHRR(x, s) ((RC5_WORD)((x) >> ((s)&ROT_MASK)))
#define ROTL(x, s, w) ((RC5_WORD)(SHLL((x), (s))|SHLR((x), (s), (w))))
#define ROTR(x, s, w) ((RC5_WORD)(SHRL((x), (s), (w))|SHRR((x), (s))))
#define P16 0xb7e1
#define Q16 0x9e37
#define P32 0xb7e15163
#define Q32 0x9e3779b9
#define P64 0xb7e151628aed2a6b
#define Q64 0x9e3779b97f4a7c15
#if W == 16
#define Pw P16
#define Qw Q16
#elif W == 32
#define Pw P32
#define Qw Q32
#elif W == 64
#define Pw P64
#define Qw Q64
#endif
#define RC5_ENCRYPT 1
#define RC5_DECRYPT 0
extern void set_rc5_expandkey __P((RC5_WORD *, u_int8_t *, size_t, int));
extern void rc5_encrypt_round16 __P((u_int8_t *, const u_int8_t *,
const RC5_WORD *));
extern void rc5_decrypt_round16 __P((u_int8_t *, const u_int8_t *,
const RC5_WORD *));
extern int rc5_cbc_process __P((struct mbuf *, size_t, size_t, RC5_WORD *,
u_int8_t *, int));
#endif
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