/* $NetBSD: isakmp_agg.c,v 1.9 2006/09/30 21:49:37 manu Exp $ */
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/* Id: isakmp_agg.c,v 1.28 2006/04/06 16:46:08 manubsd 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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/* Aggressive Exchange (Aggressive Mode) */
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#include "config.h"
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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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#ifdef ENABLE_HYBRID
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#include <resolv.h>
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#endif
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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 "evt.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_agg.h"
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#include "isakmp_inf.h"
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#ifdef ENABLE_HYBRID
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#include "isakmp_xauth.h"
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#include "isakmp_cfg.h"
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#endif
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#ifdef ENABLE_FRAG
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#include "isakmp_frag.h"
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#endif
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#include "vendorid.h"
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#include "strnames.h"
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#ifdef ENABLE_NATT
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#include "nattraversal.h"
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#endif
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#ifdef HAVE_GSSAPI
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#include "gssapi.h"
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#endif
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/*
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* begin Aggressive 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, KE, Ni, IDi1
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* sig: HDR, SA, KE, Ni, IDi1 [, CR ]
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* gssapi: HDR, SA, KE, Ni, IDi1, GSSi
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* rsa: HDR, SA, [ HASH(1),] KE, <IDi1_b>Pubkey_r, <Ni_b>Pubkey_r
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* rev: HDR, SA, [ HASH(1),] <Ni_b>Pubkey_r, <KE_b>Ke_i,
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* <IDii_b>Ke_i [, <Cert-I_b>Ke_i ]
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*/
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int
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agg_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 payload_list *plist = NULL;
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int need_cr = 0;
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vchar_t *cr = NULL;
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int error = -1;
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#ifdef ENABLE_NATT
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vchar_t *vid_natt[MAX_NATT_VID_COUNT] = { NULL };
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int i;
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#endif
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#ifdef ENABLE_HYBRID
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vchar_t *vid_xauth = NULL;
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vchar_t *vid_unity = NULL;
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#endif
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#ifdef ENABLE_FRAG
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vchar_t *vid_frag = NULL;
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#endif
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#ifdef HAVE_GSSAPI
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vchar_t *gsstoken = NULL;
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int len;
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#endif
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#ifdef ENABLE_DPD
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vchar_t *vid_dpd = NULL;
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#endif
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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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/* consistency check of proposals */
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if (iph1->rmconf->dhgrp == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"configuration failure about DH group.\n");
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goto end;
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}
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/* generate DH public value */
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if (oakley_dh_generate(iph1->rmconf->dhgrp,
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&iph1->dhpub, &iph1->dhpriv) < 0)
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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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#ifdef ENABLE_HYBRID
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/* Do we need Xauth VID? */
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switch (RMAUTHMETHOD(iph1)) {
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case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
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case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
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case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
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case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
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case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
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case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
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case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
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if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL)
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plog(LLV_ERROR, LOCATION, NULL,
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"Xauth vendor ID generation failed\n");
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if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL)
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plog(LLV_ERROR, LOCATION, NULL,
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"Unity vendor ID generation failed\n");
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break;
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default:
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break;
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}
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#endif
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#ifdef ENABLE_FRAG
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if (iph1->rmconf->ike_frag) {
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vid_frag = set_vendorid(VENDORID_FRAG);
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if (vid_frag != NULL)
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vid_frag = isakmp_frag_addcap(vid_frag,
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VENDORID_FRAG_AGG);
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if (vid_frag == NULL)
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plog(LLV_ERROR, LOCATION, NULL,
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"Frag vendorID construction failed\n");
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}
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#endif
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/* create CR if need */
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if (iph1->rmconf->send_cr
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&& oakley_needcr(iph1->rmconf->proposal->authmethod)
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&& iph1->rmconf->peerscertfile == NULL) {
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need_cr = 1;
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cr = oakley_getcr(iph1);
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if (cr == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"failed to get cr buffer.\n");
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goto end;
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}
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}
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plog(LLV_DEBUG, LOCATION, NULL, "authmethod is %s\n",
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s_oakley_attr_method(iph1->rmconf->proposal->authmethod));
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#ifdef HAVE_GSSAPI
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if (RMAUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
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gssapi_get_itoken(iph1, &len);
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#endif
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/* set SA payload to propose */
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plist = isakmp_plist_append(plist, iph1->sa, ISAKMP_NPTYPE_SA);
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/* create isakmp KE payload */
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plist = isakmp_plist_append(plist, iph1->dhpub, ISAKMP_NPTYPE_KE);
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/* create isakmp NONCE payload */
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plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE);
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/* create isakmp ID payload */
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plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
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#ifdef HAVE_GSSAPI
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if (RMAUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) {
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gssapi_get_token_to_send(iph1, &gsstoken);
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plist = isakmp_plist_append(plist, gsstoken, ISAKMP_NPTYPE_GSS);
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}
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#endif
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/* create isakmp CR payload */
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if (need_cr)
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plist = isakmp_plist_append(plist, cr, ISAKMP_NPTYPE_CR);
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#ifdef ENABLE_FRAG
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if (vid_frag)
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plist = isakmp_plist_append(plist, vid_frag, ISAKMP_NPTYPE_VID);
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#endif
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#ifdef ENABLE_NATT
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/*
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* set VID payload for NAT-T if NAT-T
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* support allowed in the config file
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*/
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if (iph1->rmconf->nat_traversal)
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plist = isakmp_plist_append_natt_vids(plist, vid_natt);
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#endif
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#ifdef ENABLE_HYBRID
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if (vid_xauth)
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plist = isakmp_plist_append(plist,
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vid_xauth, ISAKMP_NPTYPE_VID);
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if (vid_unity)
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plist = isakmp_plist_append(plist,
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vid_unity, ISAKMP_NPTYPE_VID);
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#endif
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#ifdef ENABLE_DPD
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if(iph1->rmconf->dpd){
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vid_dpd = set_vendorid(VENDORID_DPD);
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if (vid_dpd != NULL)
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plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID);
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}
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#endif
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iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
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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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if (cr)
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vfree(cr);
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#ifdef HAVE_GSSAPI
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if (gsstoken)
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vfree(gsstoken);
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#endif
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#ifdef ENABLE_FRAG
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if (vid_frag)
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vfree(vid_frag);
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#endif
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#ifdef ENABLE_NATT
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for (i = 0; i < MAX_NATT_VID_COUNT && vid_natt[i] != NULL; i++)
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vfree(vid_natt[i]);
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#endif
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#ifdef ENABLE_HYBRID
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if (vid_xauth != NULL)
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vfree(vid_xauth);
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if (vid_unity != NULL)
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vfree(vid_unity);
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#endif
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#ifdef ENABLE_DPD
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if (vid_dpd != NULL)
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vfree(vid_dpd);
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#endif
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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, KE, Nr, IDr1, HASH_R
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* sig: HDR, SA, KE, Nr, IDr1, [ CR, ] [ CERT, ] SIG_R
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* gssapi: HDR, SA, KE, Nr, IDr1, GSSr, HASH_R
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* rsa: HDR, SA, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i, HASH_R
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* rev: HDR, SA, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDir_b>Ke_r, HASH_R
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*/
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int
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agg_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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int vid_numeric;
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int ptype;
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#ifdef ENABLE_HYBRID
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vchar_t *unity_vid;
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vchar_t *xauth_vid;
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#endif
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#ifdef HAVE_GSSAPI
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vchar_t *gsstoken = NULL;
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#endif
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#ifdef ENABLE_NATT
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int natd_seq = 0;
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struct natd_payload {
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int seq;
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vchar_t *payload;
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TAILQ_ENTRY(natd_payload) chain;
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};
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TAILQ_HEAD(_natd_payload, natd_payload) natd_tree;
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TAILQ_INIT(&natd_tree);
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#endif
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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);
|
if (pbuf == NULL)
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goto end;
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pa = (struct isakmp_parse_t *)pbuf->v;
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iph1->pl_hash = NULL;
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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_KE:
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if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
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goto end;
|
break;
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case ISAKMP_NPTYPE_NONCE:
|
if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
|
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_HASH:
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iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
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break;
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case ISAKMP_NPTYPE_CR:
|
if (oakley_savecr(iph1, pa->ptr) < 0)
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goto end;
|
break;
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case ISAKMP_NPTYPE_CERT:
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if (oakley_savecert(iph1, pa->ptr) < 0)
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goto end;
|
break;
|
case ISAKMP_NPTYPE_SIG:
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if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
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goto end;
|
break;
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case ISAKMP_NPTYPE_VID:
|
handle_vendorid(iph1, pa->ptr);
|
break;
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case ISAKMP_NPTYPE_N:
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isakmp_check_notify(pa->ptr, iph1);
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break;
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#ifdef HAVE_GSSAPI
|
case ISAKMP_NPTYPE_GSS:
|
if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
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goto end;
|
gssapi_save_received_token(iph1, gsstoken);
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break;
|
#endif
|
|
#ifdef ENABLE_NATT
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case ISAKMP_NPTYPE_NATD_DRAFT:
|
case ISAKMP_NPTYPE_NATD_RFC:
|
if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL &&
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pa->type == iph1->natt_options->payload_nat_d) {
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struct natd_payload *natd;
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natd = (struct natd_payload *)racoon_malloc(sizeof(*natd));
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if (!natd)
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goto end;
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|
natd->payload = NULL;
|
|
if (isakmp_p2ph (&natd->payload, pa->ptr) < 0)
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goto end;
|
|
natd->seq = natd_seq++;
|
|
TAILQ_INSERT_TAIL(&natd_tree, natd, chain);
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break;
|
}
|
/* passthrough to default... */
|
#endif
|
|
default:
|
/* don't send information, see isakmp_ident_r1() */
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
"ignore the packet, "
|
"received unexpecting payload type %d.\n",
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pa->type);
|
goto end;
|
}
|
}
|
|
/* payload existency check */
|
if (iph1->dhpub_p == NULL || iph1->nonce_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(satmp, iph1) < 0) {
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
"failed to get valid proposal.\n");
|
/* XXX send information */
|
goto end;
|
}
|
VPTRINIT(iph1->sa_ret);
|
|
/* fix isakmp index */
|
memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck,
|
sizeof(cookie_t));
|
|
#ifdef ENABLE_NATT
|
if (NATT_AVAILABLE(iph1)) {
|
struct natd_payload *natd = NULL;
|
int natd_verified;
|
|
plog(LLV_INFO, LOCATION, iph1->remote,
|
"Selected NAT-T version: %s\n",
|
vid_string_by_id(iph1->natt_options->version));
|
|
/* set both bits first so that we can clear them
|
upon verifying hashes */
|
iph1->natt_flags |= NAT_DETECTED;
|
|
while ((natd = TAILQ_FIRST(&natd_tree)) != NULL) {
|
/* this function will clear appropriate bits bits
|
from iph1->natt_flags */
|
natd_verified = natt_compare_addr_hash (iph1,
|
natd->payload, natd->seq);
|
|
plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
|
natd->seq - 1,
|
natd_verified ? "verified" : "doesn't match");
|
|
vfree (natd->payload);
|
|
TAILQ_REMOVE(&natd_tree, natd, chain);
|
racoon_free (natd);
|
}
|
|
plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
|
iph1->natt_flags & NAT_DETECTED ?
|
"detected:" : "not detected",
|
iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
|
iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
|
|
if (iph1->natt_flags & NAT_DETECTED)
|
natt_float_ports (iph1);
|
}
|
#endif
|
|
/* compute sharing secret of DH */
|
if (oakley_dh_compute(iph1->rmconf->dhgrp, iph1->dhpub,
|
iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
|
goto end;
|
|
/* generate SKEYIDs & IV & final cipher key */
|
if (oakley_skeyid(iph1) < 0)
|
goto end;
|
if (oakley_skeyid_dae(iph1) < 0)
|
goto end;
|
if (oakley_compute_enckey(iph1) < 0)
|
goto end;
|
if (oakley_newiv(iph1) < 0)
|
goto end;
|
|
/* validate authentication value */
|
ptype = oakley_validate_auth(iph1);
|
if (ptype != 0) {
|
if (ptype == -1) {
|
/* message printed inner oakley_validate_auth() */
|
goto end;
|
}
|
EVT_PUSH(iph1->local, iph1->remote,
|
EVTT_PEERPH1AUTH_FAILED, NULL);
|
isakmp_info_send_n1(iph1, ptype, NULL);
|
goto end;
|
}
|
|
if (oakley_checkcr(iph1) < 0) {
|
/* Ignore this error in order to be interoperability. */
|
;
|
}
|
|
/* change status of isakmp status entry */
|
iph1->status = PHASE1ST_MSG2RECEIVED;
|
|
error = 0;
|
|
end:
|
#ifdef HAVE_GSSAPI
|
if (gsstoken)
|
vfree(gsstoken);
|
#endif
|
if (pbuf)
|
vfree(pbuf);
|
if (satmp)
|
vfree(satmp);
|
if (error) {
|
VPTRINIT(iph1->dhpub_p);
|
VPTRINIT(iph1->nonce_p);
|
VPTRINIT(iph1->id_p);
|
oakley_delcert(iph1->cert_p);
|
iph1->cert_p = NULL;
|
oakley_delcert(iph1->crl_p);
|
iph1->crl_p = NULL;
|
VPTRINIT(iph1->sig_p);
|
oakley_delcert(iph1->cr_p);
|
iph1->cr_p = NULL;
|
}
|
|
return error;
|
}
|
|
/*
|
* send to responder
|
* psk: HDR, HASH_I
|
* gssapi: HDR, HASH_I
|
* sig: HDR, [ CERT, ] SIG_I
|
* rsa: HDR, HASH_I
|
* rev: HDR, HASH_I
|
*/
|
int
|
agg_i2send(iph1, msg)
|
struct ph1handle *iph1;
|
vchar_t *msg;
|
{
|
struct payload_list *plist = NULL;
|
int need_cert = 0;
|
int error = -1;
|
vchar_t *gsshash = NULL;
|
|
/* 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");
|
iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
|
if (iph1->hash == NULL) {
|
#ifdef HAVE_GSSAPI
|
if (gssapi_more_tokens(iph1) &&
|
#ifdef ENABLE_HYBRID
|
!iph1->rmconf->xauth &&
|
#endif
|
1)
|
isakmp_info_send_n1(iph1,
|
ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
|
#endif
|
goto end;
|
}
|
|
switch (AUTHMETHOD(iph1)) {
|
case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
|
#ifdef ENABLE_HYBRID
|
case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
|
case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
|
case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
|
#endif
|
/* set HASH payload */
|
plist = isakmp_plist_append(plist,
|
iph1->hash, ISAKMP_NPTYPE_HASH);
|
break;
|
|
case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
|
case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
|
#ifdef ENABLE_HYBRID
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
|
#endif
|
/* XXX if there is CR or not ? */
|
|
if (oakley_getmycert(iph1) < 0)
|
goto end;
|
|
if (oakley_getsign(iph1) < 0)
|
goto end;
|
|
if (iph1->cert != NULL && iph1->rmconf->send_cert)
|
need_cert = 1;
|
|
/* add CERT payload if there */
|
if (need_cert)
|
plist = isakmp_plist_append(plist,
|
iph1->cert->pl, ISAKMP_NPTYPE_CERT);
|
|
/* add SIG payload */
|
plist = isakmp_plist_append(plist,
|
iph1->sig, ISAKMP_NPTYPE_SIG);
|
break;
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
|
case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
|
#ifdef ENABLE_HYBRID
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
|
#endif
|
break;
|
#ifdef HAVE_GSSAPI
|
case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
|
gsshash = gssapi_wraphash(iph1);
|
if (gsshash == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to wrap hash\n");
|
isakmp_info_send_n1(iph1,
|
ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
|
goto end;
|
}
|
|
plist = isakmp_plist_append(plist,
|
gsshash, ISAKMP_NPTYPE_HASH);
|
break;
|
#endif
|
}
|
|
#ifdef ENABLE_NATT
|
/* generate NAT-D payloads */
|
if (NATT_AVAILABLE(iph1)) {
|
vchar_t *natd[2] = { NULL, NULL };
|
|
plog(LLV_INFO, LOCATION,
|
NULL, "Adding remote and local NAT-D payloads.\n");
|
|
if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"NAT-D hashing failed for %s\n",
|
saddr2str(iph1->remote));
|
goto end;
|
}
|
|
if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"NAT-D hashing failed for %s\n",
|
saddr2str(iph1->local));
|
goto end;
|
}
|
|
plist = isakmp_plist_append(plist,
|
natd[0], iph1->natt_options->payload_nat_d);
|
plist = isakmp_plist_append(plist,
|
natd[1], iph1->natt_options->payload_nat_d);
|
}
|
#endif
|
|
iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
|
|
#ifdef HAVE_PRINT_ISAKMP_C
|
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
|
#endif
|
|
/* send 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;
|
}
|
|
/* set encryption flag */
|
iph1->flags |= ISAKMP_FLAG_E;
|
|
iph1->status = PHASE1ST_ESTABLISHED;
|
|
error = 0;
|
|
end:
|
if (gsshash)
|
vfree(gsshash);
|
return error;
|
}
|
|
/*
|
* receive from initiator
|
* psk: HDR, SA, KE, Ni, IDi1
|
* sig: HDR, SA, KE, Ni, IDi1 [, CR ]
|
* gssapi: HDR, SA, KE, Ni, IDi1 , GSSi
|
* rsa: HDR, SA, [ HASH(1),] KE, <IDi1_b>Pubkey_r, <Ni_b>Pubkey_r
|
* rev: HDR, SA, [ HASH(1),] <Ni_b>Pubkey_r, <KE_b>Ke_i,
|
* <IDii_b>Ke_i [, <Cert-I_b>Ke_i ]
|
*/
|
int
|
agg_r1recv(iph1, msg)
|
struct ph1handle *iph1;
|
vchar_t *msg;
|
{
|
int error = -1;
|
vchar_t *pbuf = NULL;
|
struct isakmp_parse_t *pa;
|
int vid_numeric;
|
#ifdef HAVE_GSSAPI
|
vchar_t *gsstoken = NULL;
|
#endif
|
|
/* 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 */
|
pbuf = isakmp_parse(msg);
|
if (pbuf == NULL)
|
goto end;
|
pa = (struct isakmp_parse_t *)pbuf->v;
|
|
/* SA payload is fixed postion */
|
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++) {
|
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"received payload of type %s\n",
|
s_isakmp_nptype(pa->type));
|
|
switch (pa->type) {
|
case ISAKMP_NPTYPE_KE:
|
if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
|
goto end;
|
break;
|
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:
|
vid_numeric = handle_vendorid(iph1, pa->ptr);
|
#ifdef ENABLE_FRAG
|
if ((vid_numeric == VENDORID_FRAG) &&
|
(vendorid_frag_cap(pa->ptr) & VENDORID_FRAG_AGG))
|
iph1->frag = 1;
|
#endif
|
break;
|
|
case ISAKMP_NPTYPE_CR:
|
if (oakley_savecr(iph1, pa->ptr) < 0)
|
goto end;
|
break;
|
|
#ifdef HAVE_GSSAPI
|
case ISAKMP_NPTYPE_GSS:
|
if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
|
goto end;
|
gssapi_save_received_token(iph1, gsstoken);
|
break;
|
#endif
|
default:
|
/* don't send information, see isakmp_ident_r1() */
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
"ignore the packet, "
|
"received unexpecting payload type %d.\n",
|
pa->type);
|
goto end;
|
}
|
}
|
|
/* payload existency check */
|
if (iph1->dhpub_p == NULL || iph1->nonce_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;
|
}
|
|
#ifdef ENABLE_NATT
|
if (NATT_AVAILABLE(iph1))
|
plog(LLV_INFO, LOCATION, iph1->remote,
|
"Selected NAT-T version: %s\n",
|
vid_string_by_id(iph1->natt_options->version));
|
#endif
|
|
/* 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;
|
}
|
|
if (oakley_checkcr(iph1) < 0) {
|
/* Ignore this error in order to be interoperability. */
|
;
|
}
|
|
iph1->status = PHASE1ST_MSG1RECEIVED;
|
|
error = 0;
|
|
end:
|
#ifdef HAVE_GSSAPI
|
if (gsstoken)
|
vfree(gsstoken);
|
#endif
|
if (pbuf)
|
vfree(pbuf);
|
if (error) {
|
VPTRINIT(iph1->sa);
|
VPTRINIT(iph1->dhpub_p);
|
VPTRINIT(iph1->nonce_p);
|
VPTRINIT(iph1->id_p);
|
oakley_delcert(iph1->cr_p);
|
iph1->cr_p = NULL;
|
}
|
|
return error;
|
}
|
|
/*
|
* send to initiator
|
* psk: HDR, SA, KE, Nr, IDr1, HASH_R
|
* sig: HDR, SA, KE, Nr, IDr1, [ CR, ] [ CERT, ] SIG_R
|
* gssapi: HDR, SA, KE, Nr, IDr1, GSSr, HASH_R
|
* rsa: HDR, SA, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i, HASH_R
|
* rev: HDR, SA, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDir_b>Ke_r, HASH_R
|
*/
|
int
|
agg_r1send(iph1, msg)
|
struct ph1handle *iph1;
|
vchar_t *msg;
|
{
|
struct payload_list *plist = NULL;
|
int need_cr = 0;
|
int need_cert = 0;
|
vchar_t *cr = NULL;
|
int error = -1;
|
#ifdef ENABLE_HYBRID
|
vchar_t *xauth_vid = NULL;
|
vchar_t *unity_vid = NULL;
|
#endif
|
#ifdef ENABLE_NATT
|
vchar_t *vid_natt = NULL;
|
vchar_t *natd[2] = { NULL, NULL };
|
#endif
|
#ifdef ENABLE_DPD
|
vchar_t *vid_dpd = NULL;
|
#endif
|
#ifdef ENABLE_FRAG
|
vchar_t *vid_frag = NULL;
|
#endif
|
|
#ifdef HAVE_GSSAPI
|
int gsslen;
|
vchar_t *gsstoken = NULL, *gsshash = NULL;
|
vchar_t *gss_sa = NULL;
|
int free_gss_sa = 0;
|
#endif
|
|
/* 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 DH public value */
|
if (oakley_dh_generate(iph1->rmconf->dhgrp,
|
&iph1->dhpub, &iph1->dhpriv) < 0)
|
goto end;
|
|
/* generate NONCE value */
|
iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
|
if (iph1->nonce == 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 SKEYIDs & IV & final cipher key */
|
if (oakley_skeyid(iph1) < 0)
|
goto end;
|
if (oakley_skeyid_dae(iph1) < 0)
|
goto end;
|
if (oakley_compute_enckey(iph1) < 0)
|
goto end;
|
if (oakley_newiv(iph1) < 0)
|
goto end;
|
|
#ifdef HAVE_GSSAPI
|
if (RMAUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
|
gssapi_get_rtoken(iph1, &gsslen);
|
#endif
|
|
/* generate HASH to send */
|
plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_R\n");
|
iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
|
if (iph1->hash == NULL) {
|
#ifdef HAVE_GSSAPI
|
if (gssapi_more_tokens(iph1))
|
isakmp_info_send_n1(iph1,
|
ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
|
#endif
|
goto end;
|
}
|
|
/* create CR if need */
|
if (iph1->rmconf->send_cr
|
&& oakley_needcr(iph1->approval->authmethod)
|
&& iph1->rmconf->peerscertfile == NULL) {
|
need_cr = 1;
|
cr = oakley_getcr(iph1);
|
if (cr == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to get cr buffer.\n");
|
goto end;
|
}
|
}
|
|
#ifdef ENABLE_NATT
|
/* Has the peer announced NAT-T? */
|
if (NATT_AVAILABLE(iph1)) {
|
/* set chosen VID */
|
vid_natt = set_vendorid(iph1->natt_options->version);
|
|
/* generate NAT-D payloads */
|
plog (LLV_INFO, LOCATION, NULL, "Adding remote and local NAT-D payloads.\n");
|
if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"NAT-D hashing failed for %s\n", saddr2str(iph1->remote));
|
goto end;
|
}
|
|
if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"NAT-D hashing failed for %s\n", saddr2str(iph1->local));
|
goto end;
|
}
|
}
|
#endif
|
#ifdef ENABLE_DPD
|
/* Only send DPD support if remote announced DPD and if DPD support is active */
|
if (iph1->dpd_support && iph1->rmconf->dpd)
|
vid_dpd = set_vendorid(VENDORID_DPD);
|
#endif
|
#ifdef ENABLE_FRAG
|
if (iph1->frag) {
|
vid_frag = set_vendorid(VENDORID_FRAG);
|
if (vid_frag != NULL)
|
vid_frag = isakmp_frag_addcap(vid_frag,
|
VENDORID_FRAG_AGG);
|
if (vid_frag == NULL)
|
plog(LLV_ERROR, LOCATION, NULL,
|
"Frag vendorID construction failed\n");
|
}
|
#endif
|
|
switch (AUTHMETHOD(iph1)) {
|
case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
|
#ifdef ENABLE_HYBRID
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
|
#endif
|
/* set SA payload to reply */
|
plist = isakmp_plist_append(plist,
|
iph1->sa_ret, ISAKMP_NPTYPE_SA);
|
|
/* create isakmp KE payload */
|
plist = isakmp_plist_append(plist,
|
iph1->dhpub, ISAKMP_NPTYPE_KE);
|
|
/* create isakmp NONCE payload */
|
plist = isakmp_plist_append(plist,
|
iph1->nonce, ISAKMP_NPTYPE_NONCE);
|
|
/* create isakmp ID payload */
|
plist = isakmp_plist_append(plist,
|
iph1->id, ISAKMP_NPTYPE_ID);
|
|
/* create isakmp HASH payload */
|
plist = isakmp_plist_append(plist,
|
iph1->hash, ISAKMP_NPTYPE_HASH);
|
|
/* create isakmp CR payload if needed */
|
if (need_cr)
|
plist = isakmp_plist_append(plist,
|
cr, ISAKMP_NPTYPE_CR);
|
break;
|
case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
|
case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
|
#ifdef ENABLE_HYBRID
|
case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
|
case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
|
#endif
|
/* XXX if there is CR or not ? */
|
|
if (oakley_getmycert(iph1) < 0)
|
goto end;
|
|
if (oakley_getsign(iph1) < 0)
|
goto end;
|
|
if (iph1->cert != NULL && iph1->rmconf->send_cert)
|
need_cert = 1;
|
|
/* set SA payload to reply */
|
plist = isakmp_plist_append(plist,
|
iph1->sa_ret, ISAKMP_NPTYPE_SA);
|
|
/* create isakmp KE payload */
|
plist = isakmp_plist_append(plist,
|
iph1->dhpub, ISAKMP_NPTYPE_KE);
|
|
/* create isakmp NONCE payload */
|
plist = isakmp_plist_append(plist,
|
iph1->nonce, ISAKMP_NPTYPE_NONCE);
|
|
/* add ID payload */
|
plist = isakmp_plist_append(plist,
|
iph1->id, ISAKMP_NPTYPE_ID);
|
|
/* add CERT payload if there */
|
if (need_cert)
|
plist = isakmp_plist_append(plist,
|
iph1->cert->pl, ISAKMP_NPTYPE_CERT);
|
|
/* add SIG payload */
|
plist = isakmp_plist_append(plist,
|
iph1->sig, ISAKMP_NPTYPE_SIG);
|
|
/* create isakmp CR payload if needed */
|
if (need_cr)
|
plist = isakmp_plist_append(plist,
|
cr, ISAKMP_NPTYPE_CR);
|
break;
|
|
case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
|
case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
|
#ifdef ENABLE_HYBRID
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
|
case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
|
#endif
|
break;
|
#ifdef HAVE_GSSAPI
|
case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
|
/* create buffer to send isakmp payload */
|
gsshash = gssapi_wraphash(iph1);
|
if (gsshash == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to wrap hash\n");
|
/*
|
* This is probably due to the GSS
|
* roundtrips not being finished yet.
|
* Return this error in the hope that
|
* a fallback to main mode will be done.
|
*/
|
isakmp_info_send_n1(iph1,
|
ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE, NULL);
|
goto end;
|
}
|
if (iph1->approval->gssid != NULL)
|
gss_sa =
|
ipsecdoi_setph1proposal(iph1->approval);
|
else
|
gss_sa = iph1->sa_ret;
|
|
if (gss_sa != iph1->sa_ret)
|
free_gss_sa = 1;
|
|
/* set SA payload to reply */
|
plist = isakmp_plist_append(plist,
|
gss_sa, ISAKMP_NPTYPE_SA);
|
|
/* create isakmp KE payload */
|
plist = isakmp_plist_append(plist,
|
iph1->dhpub, ISAKMP_NPTYPE_KE);
|
|
/* create isakmp NONCE payload */
|
plist = isakmp_plist_append(plist,
|
iph1->nonce, ISAKMP_NPTYPE_NONCE);
|
|
/* create isakmp ID payload */
|
plist = isakmp_plist_append(plist,
|
iph1->id, ISAKMP_NPTYPE_ID);
|
|
/* create GSS payload */
|
gssapi_get_token_to_send(iph1, &gsstoken);
|
plist = isakmp_plist_append(plist,
|
gsstoken, ISAKMP_NPTYPE_GSS);
|
|
/* create isakmp HASH payload */
|
plist = isakmp_plist_append(plist,
|
gsshash, ISAKMP_NPTYPE_HASH);
|
|
/* append vendor id, if needed */
|
break;
|
#endif
|
}
|
|
#ifdef ENABLE_HYBRID
|
if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) {
|
plog (LLV_INFO, LOCATION, NULL, "Adding xauth VID payload.\n");
|
if ((xauth_vid = set_vendorid(VENDORID_XAUTH)) == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"Cannot create Xauth vendor ID\n");
|
goto end;
|
}
|
plist = isakmp_plist_append(plist,
|
xauth_vid, ISAKMP_NPTYPE_VID);
|
}
|
|
if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_UNITY) {
|
if ((unity_vid = set_vendorid(VENDORID_UNITY)) == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"Cannot create Unity vendor ID\n");
|
goto end;
|
}
|
plist = isakmp_plist_append(plist,
|
unity_vid, ISAKMP_NPTYPE_VID);
|
}
|
#endif
|
|
#ifdef ENABLE_NATT
|
/* append NAT-T payloads */
|
if (vid_natt) {
|
/* chosen VID */
|
plist = isakmp_plist_append(plist, vid_natt, ISAKMP_NPTYPE_VID);
|
/* NAT-D */
|
plist = isakmp_plist_append(plist, natd[0], iph1->natt_options->payload_nat_d);
|
plist = isakmp_plist_append(plist, natd[1], iph1->natt_options->payload_nat_d);
|
}
|
#endif
|
|
#ifdef ENABLE_FRAG
|
if (vid_frag)
|
plist = isakmp_plist_append(plist, vid_frag, ISAKMP_NPTYPE_VID);
|
#endif
|
|
#ifdef ENABLE_DPD
|
if (vid_dpd)
|
plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID);
|
#endif
|
|
iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
|
|
#ifdef HAVE_PRINT_ISAKMP_C
|
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 1);
|
#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 (cr)
|
vfree(cr);
|
#ifdef ENABLE_HYBRID
|
if (xauth_vid)
|
vfree(xauth_vid);
|
if (unity_vid)
|
vfree(unity_vid);
|
#endif
|
#ifdef HAVE_GSSAPI
|
if (gsstoken)
|
vfree(gsstoken);
|
if (gsshash)
|
vfree(gsshash);
|
if (free_gss_sa)
|
vfree(gss_sa);
|
#endif
|
#ifdef ENABLE_DPD
|
if (vid_dpd)
|
vfree(vid_dpd);
|
#endif
|
#ifdef ENABLE_FRAG
|
if (vid_frag)
|
vfree(vid_frag);
|
#endif
|
|
return error;
|
}
|
|
/*
|
* receive from initiator
|
* psk: HDR, HASH_I
|
* gssapi: HDR, HASH_I
|
* sig: HDR, [ CERT, ] SIG_I
|
* rsa: HDR, HASH_I
|
* rev: HDR, HASH_I
|
*/
|
int
|
agg_r2recv(iph1, msg0)
|
struct ph1handle *iph1;
|
vchar_t *msg0;
|
{
|
vchar_t *msg = NULL;
|
vchar_t *pbuf = NULL;
|
struct isakmp_parse_t *pa;
|
int error = -1;
|
int ptype;
|
|
#ifdef ENABLE_NATT
|
int natd_seq = 0;
|
#endif
|
|
/* validity check */
|
if (iph1->status != PHASE1ST_MSG1SENT) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"status mismatched %d.\n", iph1->status);
|
goto end;
|
}
|
|
/* decrypting if need. */
|
/* XXX configurable ? */
|
if (ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) {
|
msg = oakley_do_decrypt(iph1, msg0,
|
iph1->ivm->iv, iph1->ivm->ive);
|
if (msg == NULL)
|
goto end;
|
} else
|
msg = vdup(msg0);
|
|
/* 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_HASH:
|
iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
|
break;
|
case ISAKMP_NPTYPE_VID:
|
handle_vendorid(iph1, pa->ptr);
|
break;
|
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;
|
case ISAKMP_NPTYPE_N:
|
isakmp_check_notify(pa->ptr, iph1);
|
break;
|
|
#ifdef ENABLE_NATT
|
case ISAKMP_NPTYPE_NATD_DRAFT:
|
case ISAKMP_NPTYPE_NATD_RFC:
|
if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL &&
|
pa->type == iph1->natt_options->payload_nat_d)
|
{
|
vchar_t *natd_received = NULL;
|
int natd_verified;
|
|
if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
|
goto end;
|
|
if (natd_seq == 0)
|
iph1->natt_flags |= NAT_DETECTED;
|
|
natd_verified = natt_compare_addr_hash (iph1,
|
natd_received, natd_seq++);
|
|
plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
|
natd_seq - 1,
|
natd_verified ? "verified" : "doesn't match");
|
|
vfree (natd_received);
|
break;
|
}
|
/* passthrough to default... */
|
#endif
|
|
default:
|
/* don't send information, see isakmp_ident_r1() */
|
plog(LLV_ERROR, LOCATION, iph1->remote,
|
"ignore the packet, "
|
"received unexpecting payload type %d.\n",
|
pa->type);
|
goto end;
|
}
|
}
|
|
#ifdef ENABLE_NATT
|
if (NATT_AVAILABLE(iph1))
|
plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
|
iph1->natt_flags & NAT_DETECTED ?
|
"detected:" : "not detected",
|
iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
|
iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
|
#endif
|
|
/* validate authentication value */
|
ptype = oakley_validate_auth(iph1);
|
if (ptype != 0) {
|
if (ptype == -1) {
|
/* message printed inner oakley_validate_auth() */
|
goto end;
|
}
|
EVT_PUSH(iph1->local, iph1->remote,
|
EVTT_PEERPH1AUTH_FAILED, NULL);
|
isakmp_info_send_n1(iph1, ptype, NULL);
|
goto end;
|
}
|
|
iph1->status = PHASE1ST_MSG2RECEIVED;
|
|
error = 0;
|
|
end:
|
if (pbuf)
|
vfree(pbuf);
|
if (msg)
|
vfree(msg);
|
if (error) {
|
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
|
agg_r2send(iph1, msg)
|
struct ph1handle *iph1;
|
vchar_t *msg;
|
{
|
int error = -1;
|
|
/* validity check */
|
if (iph1->status != PHASE1ST_MSG2RECEIVED) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"status mismatched %d.\n", iph1->status);
|
goto end;
|
}
|
|
/* IV synchronized when packet encrypted. */
|
/* see handler.h about IV synchronization. */
|
if (ISSET(((struct isakmp *)msg->v)->flags, ISAKMP_FLAG_E))
|
memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l);
|
|
/* set encryption flag */
|
iph1->flags |= ISAKMP_FLAG_E;
|
|
iph1->status = PHASE1ST_ESTABLISHED;
|
|
error = 0;
|
|
end:
|
return error;
|
}
|
