bsd/netinet6/esp_rijndael.c

   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 }