133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/* $NetBSD: esp_rijndael.c,v 1.3 2000/11/08 04:57:57 itojun Exp $ */
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/* $KAME: esp_rijndael.c,v 1.3 2000/11/08 04:54:52 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "opt_inet.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/socket.h>
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#include <sys/queue.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet6/ipsec.h>
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#include <netinet6/esp.h>
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#include <netinet6/esp_rijndael.h>
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#include <crypto/rijndael/rijndael.h>
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#include <net/net_osdep.h>
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/* as rijndael uses assymetric scheduled keys, we need to do it twice. */
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int
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esp_rijndael_schedlen(algo)
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const struct esp_algorithm *algo;
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{
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return sizeof(keyInstance) * 2;
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}
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int
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esp_rijndael_schedule(algo, sav)
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const struct esp_algorithm *algo;
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struct secasvar *sav;
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{
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keyInstance *k;
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char keymat[256 / 4 + 1];
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u_char *p, *ep;
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char *q, *eq;
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/* rijndael_makeKey wants hex string for the key */
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if (_KEYLEN(sav->key_enc) * 2 > sizeof(keymat) - 1)
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return -1;
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p = _KEYBUF(sav->key_enc);
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ep = p + _KEYLEN(sav->key_enc);
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q = keymat;
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eq = &keymat[sizeof(keymat) - 1];
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while (p < ep && q < eq) {
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sprintf(q, "%02x", *p);
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q += 2;
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p++;
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}
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*eq = '\0';
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k = (keyInstance *)sav->sched;
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if (rijndael_makeKey(&k[0], DIR_DECRYPT, _KEYLEN(sav->key_enc) * 8,
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keymat) < 0)
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return -1;
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if (rijndael_makeKey(&k[1], DIR_ENCRYPT, _KEYLEN(sav->key_enc) * 8,
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keymat) < 0)
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return -1;
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return 0;
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}
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int
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esp_rijndael_blockdecrypt(algo, sav, s, d)
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const struct esp_algorithm *algo;
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struct secasvar *sav;
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u_int8_t *s;
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u_int8_t *d;
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{
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cipherInstance c;
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keyInstance *p;
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/* does not take advantage of CBC mode support */
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bzero(&c, sizeof(c));
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if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
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return -1;
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p = (keyInstance *)sav->sched;
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if (rijndael_blockDecrypt(&c, &p[0], s, algo->padbound * 8, d) < 0)
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return -1;
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return 0;
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}
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int
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esp_rijndael_blockencrypt(algo, sav, s, d)
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const struct esp_algorithm *algo;
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struct secasvar *sav;
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u_int8_t *s;
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u_int8_t *d;
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{
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cipherInstance c;
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keyInstance *p;
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/* does not take advantage of CBC mode support */
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bzero(&c, sizeof(c));
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if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
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return -1;
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p = (keyInstance *)sav->sched;
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if (rijndael_blockEncrypt(&c, &p[1], s, algo->padbound * 8, d) < 0)
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return -1;
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return 0;
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}
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