113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/* $NetBSD: esp_rijndael.c,v 1.14 2003/07/25 10:00:51 itojun Exp $ */
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/* $KAME: esp_rijndael.c,v 1.4 2001/03/02 05:53:05 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 <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: esp_rijndael.c,v 1.14 2003/07/25 10:00:51 itojun Exp $");
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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 <netinet/in.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 asymmetric scheduled keys, we need to do it twice. */
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typedef struct {
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u_int32_t r_ek[(RIJNDAEL_MAXNR+1)*4];
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u_int32_t r_dk[(RIJNDAEL_MAXNR+1)*4];
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int r_nr; /* key-length-dependent number of rounds */
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} rijndael_ctx;
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size_t
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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(rijndael_ctx);
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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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rijndael_ctx *ctx;
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ctx = (rijndael_ctx *)sav->sched;
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if ((ctx->r_nr = rijndaelKeySetupEnc(ctx->r_ek,
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(char *)_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc) * 8)) == 0)
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return -1;
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if (rijndaelKeySetupDec(ctx->r_dk, (char *)_KEYBUF(sav->key_enc),
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_KEYLEN(sav->key_enc) * 8) == 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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rijndael_ctx *ctx;
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ctx = (rijndael_ctx *)sav->sched;
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rijndaelDecrypt(ctx->r_dk, ctx->r_nr, s, d);
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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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rijndael_ctx *ctx;
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ctx = (rijndael_ctx *)sav->sched;
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rijndaelEncrypt(ctx->r_ek, ctx->r_nr, s, d);
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return 0;
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}
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