sys/netinet6/esp_rijndael.c

   1 /*      $FreeBSD: src/sys/netinet6/esp_rijndael.c,v 1.1.2.2 2003/01/11 19:10:59 ume Exp $       */
   2 /*      $DragonFly: src/sys/netinet6/esp_rijndael.c,v 1.3 2004/05/20 18:30:36 cpressey Exp $    */
   3 /*      $KAME: esp_rijndael.c,v 1.4 2001/03/02 05:53:05 itojun Exp $    */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "opt_inet.h"
  35 #include "opt_inet6.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/socket.h>
  40 #include <sys/queue.h>
  41
  42 #include <net/if.h>
  43 #include <net/route.h>
  44 #include <netinet/in.h>
  45
  46 #include <netinet6/ipsec.h>
  47 #include <netinet6/esp.h>
  48 #include <netinet6/esp_rijndael.h>
  49
  50 #include <crypto/rijndael/rijndael-api-fst.h>
  51
  52 #include <net/net_osdep.h>
  53
  54 /* as rijndael uses assymetric scheduled keys, we need to do it twice. */
  55 size_t
  56 esp_rijndael_schedlen(const struct esp_algorithm *algo)
  57 {
  58
  59         return sizeof(keyInstance) * 2;
  60 }
  61
  62 int
  63 esp_rijndael_schedule(const struct esp_algorithm *algo, struct secasvar *sav)
  64 {
  65         keyInstance *k;
  66
  67         k = (keyInstance *)sav->sched;
  68         if (rijndael_makeKey(&k[0], DIR_DECRYPT, _KEYLEN(sav->key_enc) * 8,
  69             _KEYBUF(sav->key_enc)) < 0)
  70                 return -1;
  71         if (rijndael_makeKey(&k[1], DIR_ENCRYPT, _KEYLEN(sav->key_enc) * 8,
  72             _KEYBUF(sav->key_enc)) < 0)
  73                 return -1;
  74         return 0;
  75 }
  76
  77 int
  78 esp_rijndael_blockdecrypt(const struct esp_algorithm *algo,
  79                           struct secasvar *sav, u_int8_t *s, u_int8_t *d)
  80 {
  81         cipherInstance c;
  82         keyInstance *p;
  83
  84         /* does not take advantage of CBC mode support */
  85         bzero(&c, sizeof(c));
  86         if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
  87                 return -1;
  88         p = (keyInstance *)sav->sched;
  89         if (rijndael_blockDecrypt(&c, &p[0], s, algo->padbound * 8, d) < 0)
  90                 return -1;
  91         return 0;
  92 }
  93
  94 int
  95 esp_rijndael_blockencrypt(const struct esp_algorithm *algo,
  96                           struct secasvar *sav, u_int8_t *s, u_int8_t *d)
  97 {
  98         cipherInstance c;
  99         keyInstance *p;
 100
 101         /* does not take advantage of CBC mode support */
 102         bzero(&c, sizeof(c));
 103         if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
 104                 return -1;
 105         p = (keyInstance *)sav->sched;
 106         if (rijndael_blockEncrypt(&c, &p[1], s, algo->padbound * 8, d) < 0)
 107                 return -1;
 108         return 0;
 109 }