The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/esp_rijndael.c

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    1 /*      $FreeBSD$       */
    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 "opt_inet.h"
   34 #include "opt_inet6.h"
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/socket.h>
   39 #include <sys/queue.h>
   40 
   41 #include <net/if.h>
   42 #include <net/route.h>
   43 #include <netinet/in.h>
   44 
   45 #include <netinet6/ipsec.h>
   46 #include <netinet6/esp.h>
   47 #include <netinet6/esp_rijndael.h>
   48 
   49 #include <crypto/rijndael/rijndael.h>
   50 
   51 #include <net/net_osdep.h>
   52 
   53 /* as rijndael uses assymetric scheduled keys, we need to do it twice. */
   54 int
   55 esp_rijndael_schedlen(algo)
   56         const struct esp_algorithm *algo;
   57 {
   58 
   59         return sizeof(keyInstance) * 2;
   60 }
   61 
   62 int
   63 esp_rijndael_schedule(algo, sav)
   64         const struct esp_algorithm *algo;
   65         struct secasvar *sav;
   66 {
   67         keyInstance *k;
   68 
   69         k = (keyInstance *)sav->sched;
   70         if (rijndael_makeKey(&k[0], DIR_DECRYPT, _KEYLEN(sav->key_enc) * 8,
   71             _KEYBUF(sav->key_enc)) < 0)
   72                 return -1;
   73         if (rijndael_makeKey(&k[1], DIR_ENCRYPT, _KEYLEN(sav->key_enc) * 8,
   74             _KEYBUF(sav->key_enc)) < 0)
   75                 return -1;
   76         return 0;
   77 }
   78 
   79 int
   80 esp_rijndael_blockdecrypt(algo, sav, s, d)
   81         const struct esp_algorithm *algo;
   82         struct secasvar *sav;
   83         u_int8_t *s;
   84         u_int8_t *d;
   85 {
   86         cipherInstance c;
   87         keyInstance *p;
   88 
   89         /* does not take advantage of CBC mode support */
   90         bzero(&c, sizeof(c));
   91         if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
   92                 return -1;
   93         p = (keyInstance *)sav->sched;
   94         if (rijndael_blockDecrypt(&c, &p[0], s, algo->padbound * 8, d) < 0)
   95                 return -1;
   96         return 0;
   97 }
   98 
   99 int
  100 esp_rijndael_blockencrypt(algo, sav, s, d)
  101         const struct esp_algorithm *algo;
  102         struct secasvar *sav;
  103         u_int8_t *s;
  104         u_int8_t *d;
  105 {
  106         cipherInstance c;
  107         keyInstance *p;
  108 
  109         /* does not take advantage of CBC mode support */
  110         bzero(&c, sizeof(c));
  111         if (rijndael_cipherInit(&c, MODE_ECB, NULL) < 0)
  112                 return -1;
  113         p = (keyInstance *)sav->sched;
  114         if (rijndael_blockEncrypt(&c, &p[1], s, algo->padbound * 8, d) < 0)
  115                 return -1;
  116         return 0;
  117 }

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