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: 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 }

Cache object: 1dd7413d24c433551b8ef851174d25a8


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