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/* $FreeBSD$ */
/* $KAME: esp_rijndael.c,v 1.4 2001/03/02 05:53:05 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.
*/
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet6/ipsec.h>
#include <netinet6/esp.h>
#include <netinet6/esp_rijndael.h>
#include <crypto/rijndael/rijndael.h>
#include <net/net_osdep.h>
/* as rijndael uses assymetric scheduled keys, we need to do it twice. */
int
esp_rijndael_schedlen(algo)
const struct esp_algorithm *algo;
{
return sizeof(keyInstance) * 2;
}
int
esp_rijndael_schedule(algo, sav)
const struct esp_algorithm *algo;
struct secasvar *sav;
{
keyInstance *k;
k = (keyInstance *)sav->sched;
if (rijndael_makeKey(&k[0], DIR_DECRYPT, _KEYLEN(sav->key_enc) * 8,
_KEYBUF(sav->key_enc)) < 0)
return -1;
if (rijndael_makeKey(&k[1], DIR_ENCRYPT, _KEYLEN(sav->key_enc) * 8,
_KEYBUF(sav->key_enc)) < 0)
return -1;
return 0;
}
int
esp_rijndael_blockdecrypt(algo, sav, s, d)
const struct esp_algorithm *algo;
struct secasvar *sav;
u_int8_t *s;
u_int8_t *d;
{
cipherInstance c;
keyInstance *p;
/* does not take advantage of CBC mode support */
bzero(&c, sizeof(c));
if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
return -1;
p = (keyInstance *)sav->sched;
if (rijndael_blockDecrypt(&c, &p[0], s, algo->padbound * 8, d) < 0)
return -1;
return 0;
}
int
esp_rijndael_blockencrypt(algo, sav, s, d)
const struct esp_algorithm *algo;
struct secasvar *sav;
u_int8_t *s;
u_int8_t *d;
{
cipherInstance c;
keyInstance *p;
/* does not take advantage of CBC mode support */
bzero(&c, sizeof(c));
if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
return -1;
p = (keyInstance *)sav->sched;
if (rijndael_blockEncrypt(&c, &p[1], s, algo->padbound * 8, d) < 0)
return -1;
return 0;
}
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