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Commit	Line	Data
	1	/* $FreeBSD: src/sys/netinet6/esp_rijndael.c,v 1.1.2.1 2001/07/03 11:01:50 ume Exp $ */
	2	/* $KAME: esp_rijndael.c,v 1.4 2001/03/02 05:53:05 itojun Exp $ */
	3
	4	/*
	5	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	6	* All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. Neither the name of the project nor the names of its contributors
	17	* may be used to endorse or promote products derived from this software
	18	* without specific prior written permission.
	19	*
	20	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	21	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	24	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	* SUCH DAMAGE.
	31	*/
	32
	33	#include <sys/param.h>
	34	#include <sys/systm.h>
	35	#include <sys/socket.h>
	36	#include <sys/queue.h>
	37
	38	#include <net/if.h>
	39	#include <net/route.h>
	40
	41	#include <netinet6/ipsec.h>
	42	#include <netinet6/esp.h>
	43	#include <netinet6/esp_rijndael.h>
	44
	45	#include <crypto/rijndael/rijndael.h>
	46
	47	#include <net/net_osdep.h>
	48
	49	/* as rijndael uses assymetric scheduled keys, we need to do it twice. */
	50	int
	51	esp_rijndael_schedlen(algo)
	52	const struct esp_algorithm *algo;
	53	{
	54
	55	return sizeof(keyInstance) * 2;
	56	}
	57
	58	int
	59	esp_rijndael_schedule(algo, sav)
	60	const struct esp_algorithm *algo;
	61	struct secasvar *sav;
	62	{
	63	keyInstance *k;
	64
	65	k = (keyInstance *)sav->sched;
	66	if (rijndael_makeKey(&k[0], DIR_DECRYPT, _KEYLEN(sav->key_enc) * 8,
	67	_KEYBUF(sav->key_enc)) < 0)
	68	return -1;
	69	if (rijndael_makeKey(&k[1], DIR_ENCRYPT, _KEYLEN(sav->key_enc) * 8,
	70	_KEYBUF(sav->key_enc)) < 0)
	71	return -1;
	72	return 0;
	73	}
	74
	75	int
	76	esp_rijndael_blockdecrypt(algo, sav, s, d)
	77	const struct esp_algorithm *algo;
	78	struct secasvar *sav;
	79	u_int8_t *s;
	80	u_int8_t *d;
	81	{
	82	cipherInstance c;
	83	keyInstance *p;
	84
	85	/* does not take advantage of CBC mode support */
	86	bzero(&c, sizeof(c));
	87	if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
	88	return -1;
	89	p = (keyInstance *)sav->sched;
	90	if (rijndael_blockDecrypt(&c, &p[0], s, algo->padbound * 8, d) < 0)
	91	return -1;
	92	return 0;
	93	}
	94
	95	int
	96	esp_rijndael_blockencrypt(algo, sav, s, d)
	97	const struct esp_algorithm *algo;
	98	struct secasvar *sav;
	99	u_int8_t *s;
	100	u_int8_t *d;
	101	{
	102	cipherInstance c;
	103	keyInstance *p;
	104
	105	/* does not take advantage of CBC mode support */
	106	bzero(&c, sizeof(c));
	107	if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
	108	return -1;
	109	p = (keyInstance *)sav->sched;
	110	if (rijndael_blockEncrypt(&c, &p[1], s, algo->padbound * 8, d) < 0)
	111	return -1;
	112	return 0;
	113	}