1072 lines
24 KiB
C
1072 lines
24 KiB
C
/* $KAME: isakmp_base.c,v 1.48 2001/12/12 15:29:13 sakane 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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/* Base Exchange (Base Mode) */
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: isakmp_base.c,v 1.2 2003/07/12 09:37:10 itojun Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#include "var.h"
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#include "misc.h"
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#include "vmbuf.h"
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#include "plog.h"
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#include "sockmisc.h"
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#include "schedule.h"
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#include "debug.h"
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#include "localconf.h"
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#include "remoteconf.h"
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#include "isakmp_var.h"
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#include "isakmp.h"
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#include "oakley.h"
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#include "handler.h"
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#include "ipsec_doi.h"
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#include "crypto_openssl.h"
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#include "pfkey.h"
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#include "isakmp_base.h"
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#include "isakmp_inf.h"
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#include "vendorid.h"
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/* %%%
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* begin Identity Protection Mode as initiator.
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*/
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/*
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* send to responder
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* psk: HDR, SA, Idii, Ni_b
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* sig: HDR, SA, Idii, Ni_b
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* rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r
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* rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i
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*/
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int
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base_i1send(iph1, msg)
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struct ph1handle *iph1;
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vchar_t *msg; /* must be null */
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{
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struct isakmp_gen *gen;
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caddr_t p;
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int tlen;
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int error = -1;
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/* validity check */
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if (msg != NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"msg has to be NULL in this function.\n");
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goto end;
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}
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if (iph1->status != PHASE1ST_START) {
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plog(LLV_ERROR, LOCATION, NULL,
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"status mismatched %d.\n", iph1->status);
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goto end;
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}
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/* create isakmp index */
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memset(&iph1->index, 0, sizeof(iph1->index));
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isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local);
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/* make ID payload into isakmp status */
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if (ipsecdoi_setid1(iph1) < 0)
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goto end;
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/* create SA payload for my proposal */
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iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf->proposal);
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if (iph1->sa == NULL)
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goto end;
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/* generate NONCE value */
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iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
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if (iph1->nonce == NULL)
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goto end;
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/* create buffer to send isakmp payload */
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tlen = sizeof(struct isakmp)
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+ sizeof(*gen) + iph1->sa->l
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+ sizeof(*gen) + iph1->id->l
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+ sizeof(*gen) + iph1->nonce->l;
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iph1->sendbuf = vmalloc(tlen);
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if (iph1->sendbuf == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"failed to get buffer to send.\n");
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goto end;
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}
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/* set isakmp header */
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p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_SA);
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if (p == NULL)
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goto end;
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/* set SA payload to propose */
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p = set_isakmp_payload(p, iph1->sa, ISAKMP_NPTYPE_ID);
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/* create isakmp ID payload */
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p = set_isakmp_payload(p, iph1->id, ISAKMP_NPTYPE_NONCE);
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/* create isakmp NONCE payload */
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p = set_isakmp_payload(p, iph1->nonce, ISAKMP_NPTYPE_NONE);
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#ifdef HAVE_PRINT_ISAKMP_C
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isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
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#endif
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/* send the packet, add to the schedule to resend */
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iph1->retry_counter = iph1->rmconf->retry_counter;
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if (isakmp_ph1resend(iph1) == -1)
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goto end;
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iph1->status = PHASE1ST_MSG1SENT;
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error = 0;
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end:
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return error;
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}
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/*
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* receive from responder
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* psk: HDR, SA, Idir, Nr_b
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* sig: HDR, SA, Idir, Nr_b, [ CR ]
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* rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i
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* rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r
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*/
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int
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base_i2recv(iph1, msg)
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struct ph1handle *iph1;
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vchar_t *msg;
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{
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vchar_t *pbuf = NULL;
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struct isakmp_parse_t *pa;
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vchar_t *satmp = NULL;
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int error = -1;
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/* validity check */
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if (iph1->status != PHASE1ST_MSG1SENT) {
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plog(LLV_ERROR, LOCATION, NULL,
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"status mismatched %d.\n", iph1->status);
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goto end;
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}
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/* validate the type of next payload */
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pbuf = isakmp_parse(msg);
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if (pbuf == NULL)
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goto end;
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pa = (struct isakmp_parse_t *)pbuf->v;
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/* SA payload is fixed postion */
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if (pa->type != ISAKMP_NPTYPE_SA) {
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plog(LLV_ERROR, LOCATION, iph1->remote,
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"received invalid next payload type %d, "
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"expecting %d.\n",
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pa->type, ISAKMP_NPTYPE_SA);
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goto end;
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}
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if (isakmp_p2ph(&satmp, pa->ptr) < 0)
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goto end;
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pa++;
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for (/*nothing*/;
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pa->type != ISAKMP_NPTYPE_NONE;
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pa++) {
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switch (pa->type) {
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case ISAKMP_NPTYPE_NONCE:
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if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
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goto end;
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break;
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case ISAKMP_NPTYPE_ID:
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if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
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goto end;
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break;
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case ISAKMP_NPTYPE_VID:
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(void)check_vendorid(pa->ptr);
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break;
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default:
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/* don't send information, see ident_r1recv() */
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plog(LLV_ERROR, LOCATION, iph1->remote,
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"ignore the packet, "
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"received unexpecting payload type %d.\n",
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pa->type);
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goto end;
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}
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}
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if (iph1->nonce_p == NULL || iph1->id_p == NULL) {
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plog(LLV_ERROR, LOCATION, iph1->remote,
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"few isakmp message received.\n");
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goto end;
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}
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/* verify identifier */
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if (ipsecdoi_checkid1(iph1) != 0) {
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plog(LLV_ERROR, LOCATION, iph1->remote,
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"invalid ID payload.\n");
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goto end;
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}
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/* check SA payload and set approval SA for use */
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if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) {
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plog(LLV_ERROR, LOCATION, iph1->remote,
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"failed to get valid proposal.\n");
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/* XXX send information */
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goto end;
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}
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if (iph1->sa_ret) {
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vfree(iph1->sa_ret);
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iph1->sa_ret = NULL;
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}
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iph1->status = PHASE1ST_MSG2RECEIVED;
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error = 0;
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end:
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if (pbuf)
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vfree(pbuf);
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if (satmp)
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vfree(satmp);
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if (error) {
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VPTRINIT(iph1->nonce_p);
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VPTRINIT(iph1->id_p);
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}
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return error;
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}
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/*
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* send to responder
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* psk: HDR, KE, HASH_I
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* sig: HDR, KE, [ CR, ] [CERT,] SIG_I
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* rsa: HDR, KE, HASH_I
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* rev: HDR, <KE>Ke_i, HASH_I
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*/
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int
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base_i2send(iph1, msg)
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struct ph1handle *iph1;
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vchar_t *msg;
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{
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struct isakmp_gen *gen;
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caddr_t p;
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vchar_t *vid = NULL;
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int tlen;
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int need_cert = 0;
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int error = -1;
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/* validity check */
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if (iph1->status != PHASE1ST_MSG2RECEIVED) {
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plog(LLV_ERROR, LOCATION, NULL,
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"status mismatched %d.\n", iph1->status);
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goto end;
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}
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/* fix isakmp index */
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memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck,
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sizeof(cookie_t));
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/* generate DH public value */
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if (oakley_dh_generate(iph1->approval->dhgrp,
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&iph1->dhpub, &iph1->dhpriv) < 0)
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goto end;
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/* generate SKEYID to compute hash if not signature mode */
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if (iph1->approval->authmethod != OAKLEY_ATTR_AUTH_METHOD_RSASIG
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&& iph1->approval->authmethod != OAKLEY_ATTR_AUTH_METHOD_DSSSIG) {
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if (oakley_skeyid(iph1) < 0)
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goto end;
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}
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/* generate HASH to send */
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plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n");
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iph1->hash = oakley_ph1hash_base_i(iph1, GENERATE);
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if (iph1->hash == NULL)
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goto end;
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/* create buffer to send isakmp payload */
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tlen = sizeof(struct isakmp);
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switch (iph1->approval->authmethod) {
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case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
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tlen += sizeof(*gen) + iph1->dhpub->l
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+ sizeof(*gen) + iph1->hash->l;
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if ((vid = set_vendorid(iph1->approval->vendorid)) != NULL)
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tlen += sizeof(*gen) + vid->l;
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iph1->sendbuf = vmalloc(tlen);
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if (iph1->sendbuf == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"failed to get buffer to send.\n");
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goto end;
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}
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/* set isakmp header */
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p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_KE);
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if (p == NULL)
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goto end;
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/* create isakmp KE payload */
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p = set_isakmp_payload(p, iph1->dhpub, ISAKMP_NPTYPE_HASH);
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/* create isakmp HASH payload */
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p = set_isakmp_payload(p, iph1->hash,
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vid ? ISAKMP_NPTYPE_VID : ISAKMP_NPTYPE_NONE);
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/* append vendor id, if needed */
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if (vid)
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p = set_isakmp_payload(p, vid, ISAKMP_NPTYPE_NONE);
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break;
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#ifdef HAVE_SIGNING_C
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case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
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case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
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/* XXX if there is CR or not ? */
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if (oakley_getmycert(iph1) < 0)
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goto end;
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if (oakley_getsign(iph1) < 0)
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goto end;
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if (iph1->cert && iph1->rmconf->send_cert)
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need_cert = 1;
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tlen += sizeof(*gen) + iph1->dhpub->l
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+ sizeof(*gen) + iph1->sig->l;
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if (need_cert)
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tlen += sizeof(*gen) + iph1->cert->pl->l;
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iph1->sendbuf = vmalloc(tlen);
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if (iph1->sendbuf == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"failed to get buffer to send.\n");
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goto end;
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}
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|
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/* set isakmp header */
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p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_KE);
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if (p == NULL)
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goto end;
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|
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/* create isakmp KE payload */
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p = set_isakmp_payload(p, iph1->dhpub, need_cert
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? ISAKMP_NPTYPE_CERT
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: ISAKMP_NPTYPE_SIG);
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|
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/* add CERT payload if there */
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if (need_cert)
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p = set_isakmp_payload(p, iph1->cert->pl, ISAKMP_NPTYPE_SIG);
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/* add SIG payload */
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p = set_isakmp_payload(p, iph1->sig, ISAKMP_NPTYPE_NONE);
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break;
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#endif
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case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
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/* ... */
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break;
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case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
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case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
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tlen += sizeof(*gen) + iph1->hash->l;
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break;
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}
|
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|
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#ifdef HAVE_PRINT_ISAKMP_C
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isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
|
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#endif
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|
|
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/* send the packet, add to the schedule to resend */
|
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iph1->retry_counter = iph1->rmconf->retry_counter;
|
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if (isakmp_ph1resend(iph1) == -1)
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goto end;
|
|
|
|
/* the sending message is added to the received-list. */
|
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if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
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plog(LLV_ERROR , LOCATION, NULL,
|
|
"failed to add a response packet to the tree.\n");
|
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goto end;
|
|
}
|
|
|
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iph1->status = PHASE1ST_MSG2SENT;
|
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|
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error = 0;
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|
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end:
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if (vid)
|
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vfree(vid);
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return error;
|
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}
|
|
|
|
/*
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* receive from responder
|
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* psk: HDR, KE, HASH_R
|
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* sig: HDR, KE, [CERT,] SIG_R
|
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* rsa: HDR, KE, HASH_R
|
|
* rev: HDR, <KE>_Ke_r, HASH_R
|
|
*/
|
|
int
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|
base_i3recv(iph1, msg)
|
|
struct ph1handle *iph1;
|
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vchar_t *msg;
|
|
{
|
|
vchar_t *pbuf = NULL;
|
|
struct isakmp_parse_t *pa;
|
|
int error = -1;
|
|
|
|
/* validity check */
|
|
if (iph1->status != PHASE1ST_MSG2SENT) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"status mismatched %d.\n", iph1->status);
|
|
goto end;
|
|
}
|
|
|
|
/* validate the type of next payload */
|
|
pbuf = isakmp_parse(msg);
|
|
if (pbuf == NULL)
|
|
goto end;
|
|
|
|
for (pa = (struct isakmp_parse_t *)pbuf->v;
|
|
pa->type != ISAKMP_NPTYPE_NONE;
|
|
pa++) {
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|
|
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switch (pa->type) {
|
|
case ISAKMP_NPTYPE_KE:
|
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if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
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|
goto end;
|
|
break;
|
|
case ISAKMP_NPTYPE_HASH:
|
|
iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
|
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break;
|
|
#ifdef HAVE_SIGNING_C
|
|
case ISAKMP_NPTYPE_CERT:
|
|
if (oakley_savecert(iph1, pa->ptr) < 0)
|
|
goto end;
|
|
break;
|
|
case ISAKMP_NPTYPE_SIG:
|
|
if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
|
|
goto end;
|
|
break;
|
|
#endif
|
|
case ISAKMP_NPTYPE_VID:
|
|
(void)check_vendorid(pa->ptr);
|
|
break;
|
|
default:
|
|
/* don't send information, see ident_r1recv() */
|
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
|
"ignore the packet, "
|
|
"received unexpecting payload type %d.\n",
|
|
pa->type);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
/* payload existency check */
|
|
/* validate authentication value */
|
|
{
|
|
int type;
|
|
type = oakley_validate_auth(iph1);
|
|
if (type != 0) {
|
|
if (type == -1) {
|
|
/* message printed inner oakley_validate_auth() */
|
|
goto end;
|
|
}
|
|
isakmp_info_send_n1(iph1, type, NULL);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
/* compute sharing secret of DH */
|
|
if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
|
|
iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
|
|
goto end;
|
|
|
|
/* generate SKEYID to compute hash if signature mode */
|
|
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_RSASIG
|
|
|| iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_DSSSIG) {
|
|
if (oakley_skeyid(iph1) < 0)
|
|
goto end;
|
|
}
|
|
|
|
/* generate SKEYIDs & IV & final cipher key */
|
|
if (oakley_skeyid_dae(iph1) < 0)
|
|
goto end;
|
|
if (oakley_compute_enckey(iph1) < 0)
|
|
goto end;
|
|
if (oakley_newiv(iph1) < 0)
|
|
goto end;
|
|
|
|
/* see handler.h about IV synchronization. */
|
|
memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l);
|
|
|
|
/* set encryption flag */
|
|
iph1->flags |= ISAKMP_FLAG_E;
|
|
|
|
iph1->status = PHASE1ST_MSG3RECEIVED;
|
|
|
|
error = 0;
|
|
|
|
end:
|
|
if (pbuf)
|
|
vfree(pbuf);
|
|
|
|
if (error) {
|
|
VPTRINIT(iph1->dhpub_p);
|
|
oakley_delcert(iph1->cert_p);
|
|
iph1->cert_p = NULL;
|
|
oakley_delcert(iph1->crl_p);
|
|
iph1->crl_p = NULL;
|
|
VPTRINIT(iph1->sig_p);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* status update and establish isakmp sa.
|
|
*/
|
|
int
|
|
base_i3send(iph1, msg)
|
|
struct ph1handle *iph1;
|
|
vchar_t *msg;
|
|
{
|
|
int error = -1;
|
|
|
|
/* validity check */
|
|
if (iph1->status != PHASE1ST_MSG3RECEIVED) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"status mismatched %d.\n", iph1->status);
|
|
goto end;
|
|
}
|
|
|
|
iph1->status = PHASE1ST_ESTABLISHED;
|
|
|
|
error = 0;
|
|
|
|
end:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* receive from initiator
|
|
* psk: HDR, SA, Idii, Ni_b
|
|
* sig: HDR, SA, Idii, Ni_b
|
|
* rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r
|
|
* rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i
|
|
*/
|
|
int
|
|
base_r1recv(iph1, msg)
|
|
struct ph1handle *iph1;
|
|
vchar_t *msg;
|
|
{
|
|
vchar_t *pbuf = NULL;
|
|
struct isakmp_parse_t *pa;
|
|
int error = -1;
|
|
|
|
/* validity check */
|
|
if (iph1->status != PHASE1ST_START) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"status mismatched %d.\n", iph1->status);
|
|
goto end;
|
|
}
|
|
|
|
/* validate the type of next payload */
|
|
/*
|
|
* NOTE: XXX even if multiple VID, we'll silently ignore those.
|
|
*/
|
|
pbuf = isakmp_parse(msg);
|
|
if (pbuf == NULL)
|
|
goto end;
|
|
pa = (struct isakmp_parse_t *)pbuf->v;
|
|
|
|
/* check the position of SA payload */
|
|
if (pa->type != ISAKMP_NPTYPE_SA) {
|
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
|
"received invalid next payload type %d, "
|
|
"expecting %d.\n",
|
|
pa->type, ISAKMP_NPTYPE_SA);
|
|
goto end;
|
|
}
|
|
if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0)
|
|
goto end;
|
|
pa++;
|
|
|
|
for (/*nothing*/;
|
|
pa->type != ISAKMP_NPTYPE_NONE;
|
|
pa++) {
|
|
|
|
switch (pa->type) {
|
|
case ISAKMP_NPTYPE_NONCE:
|
|
if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
|
|
goto end;
|
|
break;
|
|
case ISAKMP_NPTYPE_ID:
|
|
if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
|
|
goto end;
|
|
break;
|
|
case ISAKMP_NPTYPE_VID:
|
|
(void)check_vendorid(pa->ptr);
|
|
break;
|
|
default:
|
|
/* don't send information, see ident_r1recv() */
|
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
|
"ignore the packet, "
|
|
"received unexpecting payload type %d.\n",
|
|
pa->type);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
if (iph1->nonce_p == NULL || iph1->id_p == NULL) {
|
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
|
"few isakmp message received.\n");
|
|
goto end;
|
|
}
|
|
|
|
/* verify identifier */
|
|
if (ipsecdoi_checkid1(iph1) != 0) {
|
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
|
"invalid ID payload.\n");
|
|
goto end;
|
|
}
|
|
|
|
/* check SA payload and set approval SA for use */
|
|
if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) {
|
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
|
"failed to get valid proposal.\n");
|
|
/* XXX send information */
|
|
goto end;
|
|
}
|
|
|
|
iph1->status = PHASE1ST_MSG1RECEIVED;
|
|
|
|
error = 0;
|
|
|
|
end:
|
|
if (pbuf)
|
|
vfree(pbuf);
|
|
|
|
if (error) {
|
|
VPTRINIT(iph1->sa);
|
|
VPTRINIT(iph1->nonce_p);
|
|
VPTRINIT(iph1->id_p);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* send to initiator
|
|
* psk: HDR, SA, Idir, Nr_b
|
|
* sig: HDR, SA, Idir, Nr_b, [ CR ]
|
|
* rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i
|
|
* rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r
|
|
*/
|
|
int
|
|
base_r1send(iph1, msg)
|
|
struct ph1handle *iph1;
|
|
vchar_t *msg;
|
|
{
|
|
struct isakmp_gen *gen;
|
|
caddr_t p;
|
|
int tlen;
|
|
int error = -1;
|
|
|
|
/* validity check */
|
|
if (iph1->status != PHASE1ST_MSG1RECEIVED) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"status mismatched %d.\n", iph1->status);
|
|
goto end;
|
|
}
|
|
|
|
/* set responder's cookie */
|
|
isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local);
|
|
|
|
/* make ID payload into isakmp status */
|
|
if (ipsecdoi_setid1(iph1) < 0)
|
|
goto end;
|
|
|
|
/* generate NONCE value */
|
|
iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
|
|
if (iph1->nonce == NULL)
|
|
goto end;
|
|
|
|
/* create buffer to send isakmp payload */
|
|
tlen = sizeof(struct isakmp)
|
|
+ sizeof(*gen) + iph1->sa_ret->l
|
|
+ sizeof(*gen) + iph1->id->l
|
|
+ sizeof(*gen) + iph1->nonce->l;
|
|
|
|
iph1->sendbuf = vmalloc(tlen);
|
|
if (iph1->sendbuf == NULL) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"failed to get buffer to send.\n");
|
|
goto end;
|
|
}
|
|
|
|
/* set isakmp header */
|
|
p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_SA);
|
|
if (p == NULL)
|
|
goto end;
|
|
|
|
/* set SA payload to reply */
|
|
p = set_isakmp_payload(p, iph1->sa_ret, ISAKMP_NPTYPE_ID);
|
|
|
|
/* create isakmp ID payload */
|
|
p = set_isakmp_payload(p, iph1->id, ISAKMP_NPTYPE_NONCE);
|
|
|
|
/* create isakmp NONCE payload */
|
|
p = set_isakmp_payload(p, iph1->nonce, ISAKMP_NPTYPE_NONE);
|
|
|
|
#ifdef HAVE_PRINT_ISAKMP_C
|
|
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
|
|
#endif
|
|
|
|
/* send the packet, add to the schedule to resend */
|
|
iph1->retry_counter = iph1->rmconf->retry_counter;
|
|
if (isakmp_ph1resend(iph1) == -1)
|
|
goto end;
|
|
|
|
/* the sending message is added to the received-list. */
|
|
if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
|
|
plog(LLV_ERROR , LOCATION, NULL,
|
|
"failed to add a response packet to the tree.\n");
|
|
goto end;
|
|
}
|
|
|
|
iph1->status = PHASE1ST_MSG1SENT;
|
|
|
|
error = 0;
|
|
|
|
end:
|
|
if (iph1->sa_ret) {
|
|
vfree(iph1->sa_ret);
|
|
iph1->sa_ret = NULL;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* receive from initiator
|
|
* psk: HDR, KE, HASH_I
|
|
* sig: HDR, KE, [ CR, ] [CERT,] SIG_I
|
|
* rsa: HDR, KE, HASH_I
|
|
* rev: HDR, <KE>Ke_i, HASH_I
|
|
*/
|
|
int
|
|
base_r2recv(iph1, msg)
|
|
struct ph1handle *iph1;
|
|
vchar_t *msg;
|
|
{
|
|
vchar_t *pbuf = NULL;
|
|
struct isakmp_parse_t *pa;
|
|
int error = -1;
|
|
|
|
/* validity check */
|
|
if (iph1->status != PHASE1ST_MSG1SENT) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"status mismatched %d.\n", iph1->status);
|
|
goto end;
|
|
}
|
|
|
|
/* validate the type of next payload */
|
|
pbuf = isakmp_parse(msg);
|
|
if (pbuf == NULL)
|
|
goto end;
|
|
|
|
iph1->pl_hash = NULL;
|
|
|
|
for (pa = (struct isakmp_parse_t *)pbuf->v;
|
|
pa->type != ISAKMP_NPTYPE_NONE;
|
|
pa++) {
|
|
|
|
switch (pa->type) {
|
|
case ISAKMP_NPTYPE_KE:
|
|
if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
|
|
goto end;
|
|
break;
|
|
case ISAKMP_NPTYPE_HASH:
|
|
iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
|
|
break;
|
|
#ifdef HAVE_SIGNING_C
|
|
case ISAKMP_NPTYPE_CERT:
|
|
if (oakley_savecert(iph1, pa->ptr) < 0)
|
|
goto end;
|
|
break;
|
|
case ISAKMP_NPTYPE_SIG:
|
|
if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
|
|
goto end;
|
|
break;
|
|
#endif
|
|
case ISAKMP_NPTYPE_VID:
|
|
(void)check_vendorid(pa->ptr);
|
|
break;
|
|
default:
|
|
/* don't send information, see ident_r1recv() */
|
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
|
"ignore the packet, "
|
|
"received unexpecting payload type %d.\n",
|
|
pa->type);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
/* generate DH public value */
|
|
if (oakley_dh_generate(iph1->approval->dhgrp,
|
|
&iph1->dhpub, &iph1->dhpriv) < 0)
|
|
goto end;
|
|
|
|
/* compute sharing secret of DH */
|
|
if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
|
|
iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
|
|
goto end;
|
|
|
|
/* generate SKEYID */
|
|
if (oakley_skeyid(iph1) < 0)
|
|
goto end;
|
|
|
|
/* payload existency check */
|
|
/* validate authentication value */
|
|
{
|
|
int type;
|
|
type = oakley_validate_auth(iph1);
|
|
if (type != 0) {
|
|
if (type == -1) {
|
|
/* message printed inner oakley_validate_auth() */
|
|
goto end;
|
|
}
|
|
isakmp_info_send_n1(iph1, type, NULL);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
iph1->status = PHASE1ST_MSG2RECEIVED;
|
|
|
|
error = 0;
|
|
|
|
end:
|
|
if (pbuf)
|
|
vfree(pbuf);
|
|
|
|
if (error) {
|
|
VPTRINIT(iph1->dhpub_p);
|
|
oakley_delcert(iph1->cert_p);
|
|
iph1->cert_p = NULL;
|
|
oakley_delcert(iph1->crl_p);
|
|
iph1->crl_p = NULL;
|
|
VPTRINIT(iph1->sig_p);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* send to initiator
|
|
* psk: HDR, KE, HASH_R
|
|
* sig: HDR, KE, [CERT,] SIG_R
|
|
* rsa: HDR, KE, HASH_R
|
|
* rev: HDR, <KE>_Ke_r, HASH_R
|
|
*/
|
|
int
|
|
base_r2send(iph1, msg)
|
|
struct ph1handle *iph1;
|
|
vchar_t *msg;
|
|
{
|
|
struct isakmp_gen *gen;
|
|
char *p;
|
|
vchar_t *vid = NULL;
|
|
int tlen;
|
|
int need_cert = 0;
|
|
int error = -1;
|
|
|
|
/* validity check */
|
|
if (iph1->status != PHASE1ST_MSG2RECEIVED) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"status mismatched %d.\n", iph1->status);
|
|
goto end;
|
|
}
|
|
|
|
/* generate HASH to send */
|
|
plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n");
|
|
switch (iph1->approval->authmethod) {
|
|
case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
|
|
iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
|
|
break;
|
|
case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
|
|
case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
|
|
iph1->hash = oakley_ph1hash_base_r(iph1, GENERATE);
|
|
break;
|
|
default:
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"invalid authentication method %d\n",
|
|
iph1->approval->authmethod);
|
|
goto end;
|
|
}
|
|
if (iph1->hash == NULL)
|
|
goto end;
|
|
|
|
/* create HDR;KE;NONCE payload */
|
|
tlen = sizeof(struct isakmp);
|
|
|
|
switch (iph1->approval->authmethod) {
|
|
case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
|
|
tlen += sizeof(*gen) + iph1->dhpub->l
|
|
+ sizeof(*gen) + iph1->hash->l;
|
|
if ((vid = set_vendorid(iph1->approval->vendorid)) != NULL)
|
|
tlen += sizeof(*gen) + vid->l;
|
|
|
|
iph1->sendbuf = vmalloc(tlen);
|
|
if (iph1->sendbuf == NULL) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"failed to get iph1->sendbuf to send.\n");
|
|
goto end;
|
|
}
|
|
|
|
/* set isakmp header */
|
|
p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_KE);
|
|
if (p == NULL)
|
|
goto end;
|
|
|
|
/* create isakmp KE payload */
|
|
p = set_isakmp_payload(p, iph1->dhpub, ISAKMP_NPTYPE_HASH);
|
|
|
|
/* create isakmp HASH payload */
|
|
p = set_isakmp_payload(p, iph1->hash,
|
|
vid ? ISAKMP_NPTYPE_VID : ISAKMP_NPTYPE_NONE);
|
|
|
|
/* append vendor id, if needed */
|
|
if (vid)
|
|
p = set_isakmp_payload(p, vid, ISAKMP_NPTYPE_NONE);
|
|
break;
|
|
#ifdef HAVE_SIGNING_C
|
|
case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
|
|
/* XXX if there is CR or not ? */
|
|
|
|
if (oakley_getmycert(iph1) < 0)
|
|
goto end;
|
|
|
|
if (oakley_getsign(iph1) < 0)
|
|
goto end;
|
|
|
|
if (iph1->cert && iph1->rmconf->send_cert)
|
|
need_cert = 1;
|
|
|
|
tlen += sizeof(*gen) + iph1->dhpub->l
|
|
+ sizeof(*gen) + iph1->sig->l;
|
|
if (need_cert)
|
|
tlen += sizeof(*gen) + iph1->cert->pl->l;
|
|
|
|
iph1->sendbuf = vmalloc(tlen);
|
|
if (iph1->sendbuf == NULL) {
|
|
plog(LLV_ERROR, LOCATION, NULL,
|
|
"failed to get buffer to send.\n");
|
|
goto end;
|
|
}
|
|
|
|
/* set isakmp header */
|
|
p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_KE);
|
|
if (p == NULL)
|
|
goto end;
|
|
|
|
/* create isakmp KE payload */
|
|
p = set_isakmp_payload(p, iph1->dhpub, need_cert
|
|
? ISAKMP_NPTYPE_CERT
|
|
: ISAKMP_NPTYPE_SIG);
|
|
|
|
/* add CERT payload if there */
|
|
if (need_cert)
|
|
p = set_isakmp_payload(p, iph1->cert->pl, ISAKMP_NPTYPE_SIG);
|
|
/* add SIG payload */
|
|
p = set_isakmp_payload(p, iph1->sig, ISAKMP_NPTYPE_NONE);
|
|
break;
|
|
#endif
|
|
case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
|
|
/* ... */
|
|
break;
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
|
|
tlen += sizeof(*gen) + iph1->hash->l;
|
|
break;
|
|
}
|
|
|
|
#ifdef HAVE_PRINT_ISAKMP_C
|
|
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
|
|
#endif
|
|
|
|
/* send HDR;KE;NONCE to responder */
|
|
if (isakmp_send(iph1, iph1->sendbuf) < 0)
|
|
goto end;
|
|
|
|
/* the sending message is added to the received-list. */
|
|
if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
|
|
plog(LLV_ERROR , LOCATION, NULL,
|
|
"failed to add a response packet to the tree.\n");
|
|
goto end;
|
|
}
|
|
|
|
/* generate SKEYIDs & IV & final cipher key */
|
|
if (oakley_skeyid_dae(iph1) < 0)
|
|
goto end;
|
|
if (oakley_compute_enckey(iph1) < 0)
|
|
goto end;
|
|
if (oakley_newiv(iph1) < 0)
|
|
goto end;
|
|
|
|
/* set encryption flag */
|
|
iph1->flags |= ISAKMP_FLAG_E;
|
|
|
|
iph1->status = PHASE1ST_ESTABLISHED;
|
|
|
|
error = 0;
|
|
|
|
end:
|
|
if (vid)
|
|
vfree(vid);
|
|
return error;
|
|
}
|