1 /*	$NetBSD: isakmp_base.c,v 1.7 2006/10/02 21:51:33 manu Exp $	*/
2 
3 /*	$KAME: isakmp_base.c,v 1.49 2003/11/13 02:30:20 sakane Exp $	*/
4 
5 /*
6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. Neither the name of the project nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 /* Base Exchange (Base Mode) */
35 
36 #include "config.h"
37 
38 #include <sys/types.h>
39 #include <sys/param.h>
40 
41 #include <stdlib.h>
42 #include <stdio.h>
43 #include <string.h>
44 #include <errno.h>
45 #if TIME_WITH_SYS_TIME
46 # include <sys/time.h>
47 # include <time.h>
48 #else
49 # if HAVE_SYS_TIME_H
50 #  include <sys/time.h>
51 # else
52 #  include <time.h>
53 # endif
54 #endif
55 
56 #include "var.h"
57 #include "misc.h"
58 #include "vmbuf.h"
59 #include "plog.h"
60 #include "sockmisc.h"
61 #include "schedule.h"
62 #include "debug.h"
63 
64 #ifdef ENABLE_HYBRID
65 #include <resolv.h>
66 #endif
67 
68 #include "localconf.h"
69 #include "remoteconf.h"
70 #include "isakmp_var.h"
71 #include "isakmp.h"
72 #include "evt.h"
73 #include "oakley.h"
74 #include "handler.h"
75 #include "ipsec_doi.h"
76 #include "crypto_openssl.h"
77 #include "pfkey.h"
78 #include "isakmp_base.h"
79 #include "isakmp_inf.h"
80 #include "vendorid.h"
81 #ifdef ENABLE_NATT
82 #include "nattraversal.h"
83 #endif
84 #ifdef ENABLE_FRAG
85 #include "isakmp_frag.h"
86 #endif
87 #ifdef ENABLE_HYBRID
88 #include "isakmp_xauth.h"
89 #include "isakmp_cfg.h"
90 #endif
91 
92 /* %%%
93  * begin Identity Protection Mode as initiator.
94  */
95 /*
96  * send to responder
97  * 	psk: HDR, SA, Idii, Ni_b
98  * 	sig: HDR, SA, Idii, Ni_b
99  * 	rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r
100  * 	rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i
101  */
102 int
base_i1send(iph1,msg)103 base_i1send(iph1, msg)
104 	struct ph1handle *iph1;
105 	vchar_t *msg; /* must be null */
106 {
107 	struct payload_list *plist = NULL;
108 	int error = -1;
109 #ifdef ENABLE_NATT
110 	vchar_t *vid_natt[MAX_NATT_VID_COUNT] = { NULL };
111 	int i, vid_natt_i = 0;
112 #endif
113 #ifdef ENABLE_FRAG
114 	vchar_t *vid_frag = NULL;
115 #endif
116 #ifdef ENABLE_HYBRID
117 	vchar_t *vid_xauth = NULL;
118 	vchar_t *vid_unity = NULL;
119 #endif
120 #ifdef ENABLE_DPD
121 	vchar_t *vid_dpd = NULL;
122 #endif
123 
124 
125 	/* validity check */
126 	if (msg != NULL) {
127 		plog(LLV_ERROR, LOCATION, NULL,
128 			"msg has to be NULL in this function.\n");
129 		goto end;
130 	}
131 	if (iph1->status != PHASE1ST_START) {
132 		plog(LLV_ERROR, LOCATION, NULL,
133 			"status mismatched %d.\n", iph1->status);
134 		goto end;
135 	}
136 
137 	/* create isakmp index */
138 	memset(&iph1->index, 0, sizeof(iph1->index));
139 	isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local);
140 
141 	/* make ID payload into isakmp status */
142 	if (ipsecdoi_setid1(iph1) < 0)
143 		goto end;
144 
145 	/* create SA payload for my proposal */
146 	iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf->proposal);
147 	if (iph1->sa == NULL)
148 		goto end;
149 
150 	/* generate NONCE value */
151 	iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
152 	if (iph1->nonce == NULL)
153 		goto end;
154 
155 #ifdef ENABLE_HYBRID
156         /* Do we need Xauth VID? */
157         switch (RMAUTHMETHOD(iph1)) {
158         case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
159         case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
160         case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
161         case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
162         case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
163         case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
164         case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
165                 if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL)
166                         plog(LLV_ERROR, LOCATION, NULL,
167                              "Xauth vendor ID generation failed\n");
168 
169                 if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL)
170                         plog(LLV_ERROR, LOCATION, NULL,
171                              "Unity vendor ID generation failed\n");
172                 break;
173         default:
174                 break;
175         }
176 #endif
177 #ifdef ENABLE_FRAG
178 	if (iph1->rmconf->ike_frag) {
179 		vid_frag = set_vendorid(VENDORID_FRAG);
180 		if (vid_frag != NULL)
181 			vid_frag = isakmp_frag_addcap(vid_frag,
182 			    VENDORID_FRAG_BASE);
183 		if (vid_frag == NULL)
184 			plog(LLV_ERROR, LOCATION, NULL,
185 			    "Frag vendorID construction failed\n");
186 	}
187 #endif
188 #ifdef ENABLE_NATT
189 	/* Is NAT-T support allowed in the config file? */
190 	if (iph1->rmconf->nat_traversal) {
191 		/* Advertise NAT-T capability */
192 		memset (vid_natt, 0, sizeof (vid_natt));
193 #ifdef VENDORID_NATT_00
194 		if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_00)) != NULL)
195 			vid_natt_i++;
196 #endif
197 #ifdef VENDORID_NATT_02
198 		if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02)) != NULL)
199 			vid_natt_i++;
200 #endif
201 #ifdef VENDORID_NATT_02_N
202 		if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02_N)) != NULL)
203 			vid_natt_i++;
204 #endif
205 #ifdef VENDORID_NATT_RFC
206 		if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_RFC)) != NULL)
207 			vid_natt_i++;
208 #endif
209 	}
210 #endif
211 
212 	/* set SA payload to propose */
213 	plist = isakmp_plist_append(plist, iph1->sa, ISAKMP_NPTYPE_SA);
214 
215 	/* create isakmp ID payload */
216 	plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
217 
218 	/* create isakmp NONCE payload */
219 	plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE);
220 
221 #ifdef ENABLE_FRAG
222 	if (vid_frag)
223 		plist = isakmp_plist_append(plist, vid_frag, ISAKMP_NPTYPE_VID);
224 #endif
225 #ifdef ENABLE_HYBRID
226 	if (vid_xauth)
227 		plist = isakmp_plist_append(plist,
228 		    vid_xauth, ISAKMP_NPTYPE_VID);
229 	if (vid_unity)
230 		plist = isakmp_plist_append(plist,
231 		    vid_unity, ISAKMP_NPTYPE_VID);
232 #endif
233 #ifdef ENABLE_DPD
234 	if (iph1->rmconf->dpd) {
235 		vid_dpd = set_vendorid(VENDORID_DPD);
236 		if (vid_dpd != NULL)
237 			plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID);
238 	}
239 #endif
240 #ifdef ENABLE_NATT
241 	/* set VID payload for NAT-T */
242 	for (i = 0; i < vid_natt_i; i++)
243 		plist = isakmp_plist_append(plist, vid_natt[i], ISAKMP_NPTYPE_VID);
244 #endif
245 	iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
246 
247 
248 #ifdef HAVE_PRINT_ISAKMP_C
249 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
250 #endif
251 
252 	/* send the packet, add to the schedule to resend */
253 	iph1->retry_counter = iph1->rmconf->retry_counter;
254 	if (isakmp_ph1resend(iph1) == -1)
255 		goto end;
256 
257 	iph1->status = PHASE1ST_MSG1SENT;
258 
259 	error = 0;
260 
261 end:
262 #ifdef ENABLE_FRAG
263 	if (vid_frag)
264 		vfree(vid_frag);
265 #endif
266 #ifdef ENABLE_NATT
267 	for (i = 0; i < vid_natt_i; i++)
268 		vfree(vid_natt[i]);
269 #endif
270 #ifdef ENABLE_HYBRID
271 	if (vid_xauth != NULL)
272 		vfree(vid_xauth);
273 	if (vid_unity != NULL)
274 		vfree(vid_unity);
275 #endif
276 #ifdef ENABLE_DPD
277 	if (vid_dpd != NULL)
278 		vfree(vid_dpd);
279 #endif
280 
281 	return error;
282 }
283 
284 /*
285  * receive from responder
286  * 	psk: HDR, SA, Idir, Nr_b
287  * 	sig: HDR, SA, Idir, Nr_b, [ CR ]
288  * 	rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i
289  * 	rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r
290  */
291 int
base_i2recv(iph1,msg)292 base_i2recv(iph1, msg)
293 	struct ph1handle *iph1;
294 	vchar_t *msg;
295 {
296 	vchar_t *pbuf = NULL;
297 	struct isakmp_parse_t *pa;
298 	vchar_t *satmp = NULL;
299 	int error = -1;
300 	int vid_numeric;
301 #ifdef ENABLE_HYBRID
302 	vchar_t *unity_vid;
303 	vchar_t *xauth_vid;
304 #endif
305 
306 	/* validity check */
307 	if (iph1->status != PHASE1ST_MSG1SENT) {
308 		plog(LLV_ERROR, LOCATION, NULL,
309 			"status mismatched %d.\n", iph1->status);
310 		goto end;
311 	}
312 
313 	/* validate the type of next payload */
314 	pbuf = isakmp_parse(msg);
315 	if (pbuf == NULL)
316 		goto end;
317 	pa = (struct isakmp_parse_t *)pbuf->v;
318 
319 	/* SA payload is fixed postion */
320 	if (pa->type != ISAKMP_NPTYPE_SA) {
321 		plog(LLV_ERROR, LOCATION, iph1->remote,
322 			"received invalid next payload type %d, "
323 			"expecting %d.\n",
324 			pa->type, ISAKMP_NPTYPE_SA);
325 		goto end;
326 	}
327 	if (isakmp_p2ph(&satmp, pa->ptr) < 0)
328 		goto end;
329 	pa++;
330 
331 	for (/*nothing*/;
332 	     pa->type != ISAKMP_NPTYPE_NONE;
333 	     pa++) {
334 
335 		switch (pa->type) {
336 		case ISAKMP_NPTYPE_NONCE:
337 			if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
338 				goto end;
339 			break;
340 		case ISAKMP_NPTYPE_ID:
341 			if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
342 				goto end;
343 			break;
344 		case ISAKMP_NPTYPE_VID:
345 			handle_vendorid(iph1, pa->ptr);
346 			break;
347 		default:
348 			/* don't send information, see ident_r1recv() */
349 			plog(LLV_ERROR, LOCATION, iph1->remote,
350 				"ignore the packet, "
351 				"received unexpecting payload type %d.\n",
352 				pa->type);
353 			goto end;
354 		}
355 	}
356 
357 	if (iph1->nonce_p == NULL || iph1->id_p == NULL) {
358 		plog(LLV_ERROR, LOCATION, iph1->remote,
359 			"few isakmp message received.\n");
360 		goto end;
361 	}
362 
363 	/* verify identifier */
364 	if (ipsecdoi_checkid1(iph1) != 0) {
365 		plog(LLV_ERROR, LOCATION, iph1->remote,
366 			"invalid ID payload.\n");
367 		goto end;
368 	}
369 
370 #ifdef ENABLE_NATT
371 	if (NATT_AVAILABLE(iph1))
372 		plog(LLV_INFO, LOCATION, iph1->remote,
373 		     "Selected NAT-T version: %s\n",
374 		     vid_string_by_id(iph1->natt_options->version));
375 #endif
376 
377 	/* check SA payload and set approval SA for use */
378 	if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) {
379 		plog(LLV_ERROR, LOCATION, iph1->remote,
380 			"failed to get valid proposal.\n");
381 		/* XXX send information */
382 		goto end;
383 	}
384 	VPTRINIT(iph1->sa_ret);
385 
386 	iph1->status = PHASE1ST_MSG2RECEIVED;
387 
388 	error = 0;
389 
390 end:
391 	if (pbuf)
392 		vfree(pbuf);
393 	if (satmp)
394 		vfree(satmp);
395 
396 	if (error) {
397 		VPTRINIT(iph1->nonce_p);
398 		VPTRINIT(iph1->id_p);
399 	}
400 
401 	return error;
402 }
403 
404 /*
405  * send to responder
406  * 	psk: HDR, KE, HASH_I
407  * 	sig: HDR, KE, [ CR, ] [CERT,] SIG_I
408  * 	rsa: HDR, KE, HASH_I
409  * 	rev: HDR, <KE>Ke_i, HASH_I
410  */
411 int
base_i2send(iph1,msg)412 base_i2send(iph1, msg)
413 	struct ph1handle *iph1;
414 	vchar_t *msg;
415 {
416 	struct payload_list *plist = NULL;
417 	vchar_t *vid = NULL;
418 	int need_cert = 0;
419 	int error = -1;
420 
421 	/* validity check */
422 	if (iph1->status != PHASE1ST_MSG2RECEIVED) {
423 		plog(LLV_ERROR, LOCATION, NULL,
424 			"status mismatched %d.\n", iph1->status);
425 		goto end;
426 	}
427 
428 	/* fix isakmp index */
429 	memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck,
430 		sizeof(cookie_t));
431 
432 	/* generate DH public value */
433 	if (oakley_dh_generate(iph1->approval->dhgrp,
434 				&iph1->dhpub, &iph1->dhpriv) < 0)
435 		goto end;
436 
437 	/* generate SKEYID to compute hash if not signature mode */
438 	switch (AUTHMETHOD(iph1)) {
439 	case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
440 	case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
441 #ifdef ENABLE_HYBRID
442 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I:
443 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
444 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
445 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
446 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
447 #endif
448 		break;
449 	default:
450 		if (oakley_skeyid(iph1) < 0)
451 			goto end;
452 		break;
453 	}
454 
455 	/* generate HASH to send */
456 	plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n");
457 	iph1->hash = oakley_ph1hash_base_i(iph1, GENERATE);
458 	if (iph1->hash == NULL)
459 		goto end;
460 	switch (AUTHMETHOD(iph1)) {
461 	case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
462 #ifdef ENABLE_HYBRID
463 	case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
464 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
465 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
466 #endif
467 		vid = set_vendorid(iph1->approval->vendorid);
468 
469 		/* create isakmp KE payload */
470 		plist = isakmp_plist_append(plist, iph1->dhpub, ISAKMP_NPTYPE_KE);
471 
472 		/* create isakmp HASH payload */
473 		plist = isakmp_plist_append(plist, iph1->hash, ISAKMP_NPTYPE_HASH);
474 
475 		/* append vendor id, if needed */
476 		if (vid)
477 			plist = isakmp_plist_append(plist, vid, ISAKMP_NPTYPE_VID);
478 		break;
479 	case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
480 	case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
481 #ifdef ENABLE_HYBRID
482 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
483 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
484 #endif
485 		/* XXX if there is CR or not ? */
486 
487 		if (oakley_getmycert(iph1) < 0)
488 			goto end;
489 
490 		if (oakley_getsign(iph1) < 0)
491 			goto end;
492 
493 		if (iph1->cert && iph1->rmconf->send_cert)
494 			need_cert = 1;
495 
496 		/* create isakmp KE payload */
497 		plist = isakmp_plist_append(plist,
498 		    iph1->dhpub, ISAKMP_NPTYPE_KE);
499 
500 		/* add CERT payload if there */
501 		if (need_cert)
502 			plist = isakmp_plist_append(plist,
503 			    iph1->cert->pl, ISAKMP_NPTYPE_CERT);
504 
505 		/* add SIG payload */
506 		plist = isakmp_plist_append(plist,
507 		    iph1->sig, ISAKMP_NPTYPE_SIG);
508 
509 		break;
510 #ifdef HAVE_GSSAPI
511 	case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
512 		/* ... */
513 		break;
514 #endif
515 	case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
516 	case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
517 #ifdef ENABLE_HYBRID
518 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
519 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
520 #endif
521 		break;
522 	}
523 
524 #ifdef ENABLE_NATT
525 	/* generate NAT-D payloads */
526 	if (NATT_AVAILABLE(iph1))
527 	{
528 		vchar_t *natd[2] = { NULL, NULL };
529 
530 		plog (LLV_INFO, LOCATION, NULL, "Adding remote and local NAT-D payloads.\n");
531 		if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) {
532 			plog(LLV_ERROR, LOCATION, NULL,
533 				"NAT-D hashing failed for %s\n", saddr2str(iph1->remote));
534 			goto end;
535 		}
536 
537 		if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) {
538 			plog(LLV_ERROR, LOCATION, NULL,
539 				"NAT-D hashing failed for %s\n", saddr2str(iph1->local));
540 			goto end;
541 		}
542 
543 		plist = isakmp_plist_append(plist, natd[0], iph1->natt_options->payload_nat_d);
544 		plist = isakmp_plist_append(plist, natd[1], iph1->natt_options->payload_nat_d);
545 	}
546 #endif
547 
548 	iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
549 
550 #ifdef HAVE_PRINT_ISAKMP_C
551 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
552 #endif
553 
554 	/* send the packet, add to the schedule to resend */
555 	iph1->retry_counter = iph1->rmconf->retry_counter;
556 	if (isakmp_ph1resend(iph1) == -1)
557 		goto end;
558 
559 	/* the sending message is added to the received-list. */
560 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
561 		plog(LLV_ERROR , LOCATION, NULL,
562 			"failed to add a response packet to the tree.\n");
563 		goto end;
564 	}
565 
566 	iph1->status = PHASE1ST_MSG2SENT;
567 
568 	error = 0;
569 
570 end:
571 	if (vid)
572 		vfree(vid);
573 	return error;
574 }
575 
576 /*
577  * receive from responder
578  * 	psk: HDR, KE, HASH_R
579  * 	sig: HDR, KE, [CERT,] SIG_R
580  * 	rsa: HDR, KE, HASH_R
581  * 	rev: HDR, <KE>_Ke_r, HASH_R
582  */
583 int
base_i3recv(iph1,msg)584 base_i3recv(iph1, msg)
585 	struct ph1handle *iph1;
586 	vchar_t *msg;
587 {
588 	vchar_t *pbuf = NULL;
589 	struct isakmp_parse_t *pa;
590 	int error = -1;
591 	int ptype;
592 #ifdef ENABLE_NATT
593 	vchar_t	*natd_received;
594 	int natd_seq = 0, natd_verified;
595 #endif
596 
597 	/* validity check */
598 	if (iph1->status != PHASE1ST_MSG2SENT) {
599 		plog(LLV_ERROR, LOCATION, NULL,
600 			"status mismatched %d.\n", iph1->status);
601 		goto end;
602 	}
603 
604 	/* validate the type of next payload */
605 	pbuf = isakmp_parse(msg);
606 	if (pbuf == NULL)
607 		goto end;
608 
609 	for (pa = (struct isakmp_parse_t *)pbuf->v;
610 	     pa->type != ISAKMP_NPTYPE_NONE;
611 	     pa++) {
612 
613 		switch (pa->type) {
614 		case ISAKMP_NPTYPE_KE:
615 			if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
616 				goto end;
617 			break;
618 		case ISAKMP_NPTYPE_HASH:
619 			iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
620 			break;
621 		case ISAKMP_NPTYPE_CERT:
622 			if (oakley_savecert(iph1, pa->ptr) < 0)
623 				goto end;
624 			break;
625 		case ISAKMP_NPTYPE_SIG:
626 			if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
627 				goto end;
628 			break;
629 		case ISAKMP_NPTYPE_VID:
630 			handle_vendorid(iph1, pa->ptr);
631 			break;
632 
633 #ifdef ENABLE_NATT
634 		case ISAKMP_NPTYPE_NATD_DRAFT:
635 		case ISAKMP_NPTYPE_NATD_RFC:
636 			if (NATT_AVAILABLE(iph1) && iph1->natt_options &&
637 			    pa->type == iph1->natt_options->payload_nat_d) {
638 				natd_received = NULL;
639 				if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
640 					goto end;
641 
642 				/* set both bits first so that we can clear them
643 				   upon verifying hashes */
644 				if (natd_seq == 0)
645 					iph1->natt_flags |= NAT_DETECTED;
646 
647 				/* this function will clear appropriate bits bits
648 				   from iph1->natt_flags */
649 				natd_verified = natt_compare_addr_hash (iph1,
650 					natd_received, natd_seq++);
651 
652 				plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
653 					natd_seq - 1,
654 					natd_verified ? "verified" : "doesn't match");
655 
656 				vfree (natd_received);
657 				break;
658 			}
659 			/* passthrough to default... */
660 #endif
661 
662 		default:
663 			/* don't send information, see ident_r1recv() */
664 			plog(LLV_ERROR, LOCATION, iph1->remote,
665 				"ignore the packet, "
666 				"received unexpecting payload type %d.\n",
667 				pa->type);
668 			goto end;
669 		}
670 	}
671 
672 #ifdef ENABLE_NATT
673 	if (NATT_AVAILABLE(iph1)) {
674 		plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
675 		      iph1->natt_flags & NAT_DETECTED ?
676 		      		"detected:" : "not detected",
677 		      iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
678 		      iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
679 		if (iph1->natt_flags & NAT_DETECTED)
680 			natt_float_ports (iph1);
681 	}
682 #endif
683 
684 	/* payload existency check */
685 	/* validate authentication value */
686 	ptype = oakley_validate_auth(iph1);
687 	if (ptype != 0) {
688 		if (ptype == -1) {
689 			/* message printed inner oakley_validate_auth() */
690 			goto end;
691 		}
692 		EVT_PUSH(iph1->local, iph1->remote,
693 		    EVTT_PEERPH1AUTH_FAILED, NULL);
694 		isakmp_info_send_n1(iph1, ptype, NULL);
695 		goto end;
696 	}
697 
698 	/* compute sharing secret of DH */
699 	if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
700 				iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
701 		goto end;
702 
703 	/* generate SKEYID to compute hash if signature mode */
704 	switch (AUTHMETHOD(iph1)) {
705 	case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
706 	case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
707 #ifdef ENABLE_HYBRID
708 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I:
709 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
710 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
711 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
712 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
713 #endif
714 		if (oakley_skeyid(iph1) < 0)
715 			goto end;
716 		break;
717 	default:
718 		break;
719 	}
720 
721 	/* generate SKEYIDs & IV & final cipher key */
722 	if (oakley_skeyid_dae(iph1) < 0)
723 		goto end;
724 	if (oakley_compute_enckey(iph1) < 0)
725 		goto end;
726 	if (oakley_newiv(iph1) < 0)
727 		goto end;
728 
729 	/* see handler.h about IV synchronization. */
730 	memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l);
731 
732 	/* set encryption flag */
733 	iph1->flags |= ISAKMP_FLAG_E;
734 
735 	iph1->status = PHASE1ST_MSG3RECEIVED;
736 
737 	error = 0;
738 
739 end:
740 	if (pbuf)
741 		vfree(pbuf);
742 
743 	if (error) {
744 		VPTRINIT(iph1->dhpub_p);
745 		oakley_delcert(iph1->cert_p);
746 		iph1->cert_p = NULL;
747 		oakley_delcert(iph1->crl_p);
748 		iph1->crl_p = NULL;
749 		VPTRINIT(iph1->sig_p);
750 	}
751 
752 	return error;
753 }
754 
755 /*
756  * status update and establish isakmp sa.
757  */
758 int
base_i3send(iph1,msg)759 base_i3send(iph1, msg)
760 	struct ph1handle *iph1;
761 	vchar_t *msg;
762 {
763 	int error = -1;
764 
765 	/* validity check */
766 	if (iph1->status != PHASE1ST_MSG3RECEIVED) {
767 		plog(LLV_ERROR, LOCATION, NULL,
768 			"status mismatched %d.\n", iph1->status);
769 		goto end;
770 	}
771 
772 	iph1->status = PHASE1ST_ESTABLISHED;
773 
774 	error = 0;
775 
776 end:
777 	return error;
778 }
779 
780 /*
781  * receive from initiator
782  * 	psk: HDR, SA, Idii, Ni_b
783  * 	sig: HDR, SA, Idii, Ni_b
784  * 	rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r
785  * 	rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i
786  */
787 int
base_r1recv(iph1,msg)788 base_r1recv(iph1, msg)
789 	struct ph1handle *iph1;
790 	vchar_t *msg;
791 {
792 	vchar_t *pbuf = NULL;
793 	struct isakmp_parse_t *pa;
794 	int error = -1;
795 	int vid_numeric;
796 
797 	/* validity check */
798 	if (iph1->status != PHASE1ST_START) {
799 		plog(LLV_ERROR, LOCATION, NULL,
800 			"status mismatched %d.\n", iph1->status);
801 		goto end;
802 	}
803 
804 	/* validate the type of next payload */
805 	/*
806 	 * NOTE: XXX even if multiple VID, we'll silently ignore those.
807 	 */
808 	pbuf = isakmp_parse(msg);
809 	if (pbuf == NULL)
810 		goto end;
811 	pa = (struct isakmp_parse_t *)pbuf->v;
812 
813 	/* check the position of SA payload */
814 	if (pa->type != ISAKMP_NPTYPE_SA) {
815 		plog(LLV_ERROR, LOCATION, iph1->remote,
816 			"received invalid next payload type %d, "
817 			"expecting %d.\n",
818 			pa->type, ISAKMP_NPTYPE_SA);
819 		goto end;
820 	}
821 	if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0)
822 		goto end;
823 	pa++;
824 
825 	for (/*nothing*/;
826 	     pa->type != ISAKMP_NPTYPE_NONE;
827 	     pa++) {
828 
829 		switch (pa->type) {
830 		case ISAKMP_NPTYPE_NONCE:
831 			if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
832 				goto end;
833 			break;
834 		case ISAKMP_NPTYPE_ID:
835 			if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
836 				goto end;
837 			break;
838 		case ISAKMP_NPTYPE_VID:
839 			vid_numeric = handle_vendorid(iph1, pa->ptr);
840 #ifdef ENABLE_FRAG
841 			if ((vid_numeric == VENDORID_FRAG) &&
842 			    (vendorid_frag_cap(pa->ptr) & VENDORID_FRAG_BASE))
843 				iph1->frag = 1;
844 #endif
845 			break;
846 		default:
847 			/* don't send information, see ident_r1recv() */
848 			plog(LLV_ERROR, LOCATION, iph1->remote,
849 				"ignore the packet, "
850 				"received unexpecting payload type %d.\n",
851 				pa->type);
852 			goto end;
853 		}
854 	}
855 
856 	if (iph1->nonce_p == NULL || iph1->id_p == NULL) {
857 		plog(LLV_ERROR, LOCATION, iph1->remote,
858 			"few isakmp message received.\n");
859 		goto end;
860 	}
861 
862 	/* verify identifier */
863 	if (ipsecdoi_checkid1(iph1) != 0) {
864 		plog(LLV_ERROR, LOCATION, iph1->remote,
865 			"invalid ID payload.\n");
866 		goto end;
867 	}
868 
869 #ifdef ENABLE_NATT
870 	if (NATT_AVAILABLE(iph1))
871 		plog(LLV_INFO, LOCATION, iph1->remote,
872 		     "Selected NAT-T version: %s\n",
873 		     vid_string_by_id(iph1->natt_options->version));
874 #endif
875 
876 	/* check SA payload and set approval SA for use */
877 	if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) {
878 		plog(LLV_ERROR, LOCATION, iph1->remote,
879 			"failed to get valid proposal.\n");
880 		/* XXX send information */
881 		goto end;
882 	}
883 
884 	iph1->status = PHASE1ST_MSG1RECEIVED;
885 
886 	error = 0;
887 
888 end:
889 	if (pbuf)
890 		vfree(pbuf);
891 
892 	if (error) {
893 		VPTRINIT(iph1->sa);
894 		VPTRINIT(iph1->nonce_p);
895 		VPTRINIT(iph1->id_p);
896 	}
897 
898 	return error;
899 }
900 
901 /*
902  * send to initiator
903  * 	psk: HDR, SA, Idir, Nr_b
904  * 	sig: HDR, SA, Idir, Nr_b, [ CR ]
905  * 	rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i
906  * 	rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r
907  */
908 int
base_r1send(iph1,msg)909 base_r1send(iph1, msg)
910 	struct ph1handle *iph1;
911 	vchar_t *msg;
912 {
913 	struct payload_list *plist = NULL;
914 	int error = -1;
915 #ifdef ENABLE_NATT
916 	vchar_t *vid_natt = NULL;
917 #endif
918 #ifdef ENABLE_HYBRID
919         vchar_t *vid_xauth = NULL;
920         vchar_t *vid_unity = NULL;
921 #endif
922 #ifdef ENABLE_FRAG
923 	vchar_t *vid_frag = NULL;
924 #endif
925 #ifdef ENABLE_DPD
926 	vchar_t *vid_dpd = NULL;
927 #endif
928 
929 	/* validity check */
930 	if (iph1->status != PHASE1ST_MSG1RECEIVED) {
931 		plog(LLV_ERROR, LOCATION, NULL,
932 			"status mismatched %d.\n", iph1->status);
933 		goto end;
934 	}
935 
936 	/* set responder's cookie */
937 	isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local);
938 
939 	/* make ID payload into isakmp status */
940 	if (ipsecdoi_setid1(iph1) < 0)
941 		goto end;
942 
943 	/* generate NONCE value */
944 	iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
945 	if (iph1->nonce == NULL)
946 		goto end;
947 
948 	/* set SA payload to reply */
949 	plist = isakmp_plist_append(plist, iph1->sa_ret, ISAKMP_NPTYPE_SA);
950 
951 	/* create isakmp ID payload */
952 	plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
953 
954 	/* create isakmp NONCE payload */
955 	plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE);
956 
957 #ifdef ENABLE_NATT
958 	/* has the peer announced nat-t? */
959 	if (NATT_AVAILABLE(iph1))
960 		vid_natt = set_vendorid(iph1->natt_options->version);
961 	if (vid_natt)
962 		plist = isakmp_plist_append(plist, vid_natt, ISAKMP_NPTYPE_VID);
963 #endif
964 #ifdef ENABLE_HYBRID
965 	if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) {
966 		plog (LLV_INFO, LOCATION, NULL, "Adding xauth VID payload.\n");
967 		if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL) {
968 			plog(LLV_ERROR, LOCATION, NULL,
969 			    "Cannot create Xauth vendor ID\n");
970 			goto end;
971 		}
972 		plist = isakmp_plist_append(plist,
973 		    vid_xauth, ISAKMP_NPTYPE_VID);
974 	}
975 
976 	if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_UNITY) {
977 		if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL) {
978 			plog(LLV_ERROR, LOCATION, NULL,
979 			    "Cannot create Unity vendor ID\n");
980 			goto end;
981 		}
982 		plist = isakmp_plist_append(plist,
983 		    vid_unity, ISAKMP_NPTYPE_VID);
984 	}
985 #endif
986 #ifdef ENABLE_DPD
987 	/*
988 	 * Only send DPD support if remote announced DPD
989 	 * and if DPD support is active
990 	 */
991 	if (iph1->dpd_support && iph1->rmconf->dpd) {
992 		if ((vid_dpd = set_vendorid(VENDORID_DPD)) == NULL) {
993 			plog(LLV_ERROR, LOCATION, NULL,
994 			    "DPD vendorID construction failed\n");
995 		} else {
996 			plist = isakmp_plist_append(plist, vid_dpd,
997 			    ISAKMP_NPTYPE_VID);
998 		}
999 	}
1000 #endif
1001 #ifdef ENABLE_FRAG
1002 	if (iph1->rmconf->ike_frag) {
1003 		if ((vid_frag = set_vendorid(VENDORID_FRAG)) == NULL) {
1004 			plog(LLV_ERROR, LOCATION, NULL,
1005 			    "Frag vendorID construction failed\n");
1006 		} else {
1007 			vid_frag = isakmp_frag_addcap(vid_frag,
1008 			    VENDORID_FRAG_BASE);
1009 			plist = isakmp_plist_append(plist,
1010 			    vid_frag, ISAKMP_NPTYPE_VID);
1011 		}
1012 	}
1013 #endif
1014 
1015 	iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
1016 
1017 #ifdef HAVE_PRINT_ISAKMP_C
1018 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
1019 #endif
1020 
1021 	/* send the packet, add to the schedule to resend */
1022 	iph1->retry_counter = iph1->rmconf->retry_counter;
1023 	if (isakmp_ph1resend(iph1) == -1) {
1024 		iph1 = NULL;
1025 		goto end;
1026 	}
1027 
1028 	/* the sending message is added to the received-list. */
1029 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1030 		plog(LLV_ERROR , LOCATION, NULL,
1031 			"failed to add a response packet to the tree.\n");
1032 		goto end;
1033 	}
1034 
1035 	iph1->status = PHASE1ST_MSG1SENT;
1036 
1037 	error = 0;
1038 
1039 end:
1040 #ifdef ENABLE_NATT
1041 	if (vid_natt)
1042 		vfree(vid_natt);
1043 #endif
1044 #ifdef ENABLE_HYBRID
1045 	if (vid_xauth != NULL)
1046 		vfree(vid_xauth);
1047 	if (vid_unity != NULL)
1048 		vfree(vid_unity);
1049 #endif
1050 #ifdef ENABLE_FRAG
1051 	if (vid_frag)
1052 		vfree(vid_frag);
1053 #endif
1054 #ifdef ENABLE_DPD
1055 	if (vid_dpd)
1056 		vfree(vid_dpd);
1057 #endif
1058 
1059 	if (iph1 != NULL)
1060 		VPTRINIT(iph1->sa_ret);
1061 
1062 	return error;
1063 }
1064 
1065 /*
1066  * receive from initiator
1067  * 	psk: HDR, KE, HASH_I
1068  * 	sig: HDR, KE, [ CR, ] [CERT,] SIG_I
1069  * 	rsa: HDR, KE, HASH_I
1070  * 	rev: HDR, <KE>Ke_i, HASH_I
1071  */
1072 int
base_r2recv(iph1,msg)1073 base_r2recv(iph1, msg)
1074 	struct ph1handle *iph1;
1075 	vchar_t *msg;
1076 {
1077 	vchar_t *pbuf = NULL;
1078 	struct isakmp_parse_t *pa;
1079 	int error = -1;
1080 	int ptype;
1081 #ifdef ENABLE_NATT
1082 	int natd_seq = 0;
1083 #endif
1084 
1085 	/* validity check */
1086 	if (iph1->status != PHASE1ST_MSG1SENT) {
1087 		plog(LLV_ERROR, LOCATION, NULL,
1088 			"status mismatched %d.\n", iph1->status);
1089 		goto end;
1090 	}
1091 
1092 	/* validate the type of next payload */
1093 	pbuf = isakmp_parse(msg);
1094 	if (pbuf == NULL)
1095 		goto end;
1096 
1097 	iph1->pl_hash = NULL;
1098 
1099 	for (pa = (struct isakmp_parse_t *)pbuf->v;
1100 	     pa->type != ISAKMP_NPTYPE_NONE;
1101 	     pa++) {
1102 
1103 		switch (pa->type) {
1104 		case ISAKMP_NPTYPE_KE:
1105 			if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
1106 				goto end;
1107 			break;
1108 		case ISAKMP_NPTYPE_HASH:
1109 			iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
1110 			break;
1111 		case ISAKMP_NPTYPE_CERT:
1112 			if (oakley_savecert(iph1, pa->ptr) < 0)
1113 				goto end;
1114 			break;
1115 		case ISAKMP_NPTYPE_SIG:
1116 			if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
1117 				goto end;
1118 			break;
1119 		case ISAKMP_NPTYPE_VID:
1120 			handle_vendorid(iph1, pa->ptr);
1121 			break;
1122 
1123 #ifdef ENABLE_NATT
1124 		case ISAKMP_NPTYPE_NATD_DRAFT:
1125 		case ISAKMP_NPTYPE_NATD_RFC:
1126 			if (pa->type == iph1->natt_options->payload_nat_d)
1127 			{
1128 				vchar_t *natd_received = NULL;
1129 				int natd_verified;
1130 
1131 				if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
1132 					goto end;
1133 
1134 				if (natd_seq == 0)
1135 					iph1->natt_flags |= NAT_DETECTED;
1136 
1137 				natd_verified = natt_compare_addr_hash (iph1,
1138 					natd_received, natd_seq++);
1139 
1140 				plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
1141 					natd_seq - 1,
1142 					natd_verified ? "verified" : "doesn't match");
1143 
1144 				vfree (natd_received);
1145 				break;
1146 			}
1147 			/* passthrough to default... */
1148 #endif
1149 
1150 		default:
1151 			/* don't send information, see ident_r1recv() */
1152 			plog(LLV_ERROR, LOCATION, iph1->remote,
1153 				"ignore the packet, "
1154 				"received unexpecting payload type %d.\n",
1155 				pa->type);
1156 			goto end;
1157 		}
1158 	}
1159 
1160 	/* generate DH public value */
1161 	if (oakley_dh_generate(iph1->approval->dhgrp,
1162 				&iph1->dhpub, &iph1->dhpriv) < 0)
1163 		goto end;
1164 
1165 	/* compute sharing secret of DH */
1166 	if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
1167 				iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
1168 		goto end;
1169 
1170 	/* generate SKEYID */
1171 	if (oakley_skeyid(iph1) < 0)
1172 		goto end;
1173 
1174 #ifdef ENABLE_NATT
1175 	if (NATT_AVAILABLE(iph1))
1176 		plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
1177 		      iph1->natt_flags & NAT_DETECTED ?
1178 		      		"detected:" : "not detected",
1179 		      iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
1180 		      iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
1181 #endif
1182 
1183 	/* payload existency check */
1184 	/* validate authentication value */
1185 	ptype = oakley_validate_auth(iph1);
1186 	if (ptype != 0) {
1187 		if (ptype == -1) {
1188 			/* message printed inner oakley_validate_auth() */
1189 			goto end;
1190 		}
1191 		EVT_PUSH(iph1->local, iph1->remote,
1192 		    EVTT_PEERPH1AUTH_FAILED, NULL);
1193 		isakmp_info_send_n1(iph1, ptype, NULL);
1194 		goto end;
1195 	}
1196 
1197 	iph1->status = PHASE1ST_MSG2RECEIVED;
1198 
1199 	error = 0;
1200 
1201 end:
1202 	if (pbuf)
1203 		vfree(pbuf);
1204 
1205 	if (error) {
1206 		VPTRINIT(iph1->dhpub_p);
1207 		oakley_delcert(iph1->cert_p);
1208 		iph1->cert_p = NULL;
1209 		oakley_delcert(iph1->crl_p);
1210 		iph1->crl_p = NULL;
1211 		VPTRINIT(iph1->sig_p);
1212 	}
1213 
1214 	return error;
1215 }
1216 
1217 /*
1218  * send to initiator
1219  * 	psk: HDR, KE, HASH_R
1220  * 	sig: HDR, KE, [CERT,] SIG_R
1221  * 	rsa: HDR, KE, HASH_R
1222  * 	rev: HDR, <KE>_Ke_r, HASH_R
1223  */
1224 int
base_r2send(iph1,msg)1225 base_r2send(iph1, msg)
1226 	struct ph1handle *iph1;
1227 	vchar_t *msg;
1228 {
1229 	struct payload_list *plist = NULL;
1230 	vchar_t *vid = NULL;
1231 	int need_cert = 0;
1232 	int error = -1;
1233 
1234 	/* validity check */
1235 	if (iph1->status != PHASE1ST_MSG2RECEIVED) {
1236 		plog(LLV_ERROR, LOCATION, NULL,
1237 			"status mismatched %d.\n", iph1->status);
1238 		goto end;
1239 	}
1240 
1241 	/* generate HASH to send */
1242 	plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n");
1243 	switch (AUTHMETHOD(iph1)) {
1244 	case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
1245 #ifdef ENABLE_HYBRID
1246 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
1247 #endif
1248 	case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
1249 	case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
1250 #ifdef ENABLE_HYBRID
1251 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
1252 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
1253 #endif
1254 		iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
1255 		break;
1256 	case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
1257 	case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
1258 #ifdef ENABLE_HYBRID
1259 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
1260 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
1261 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
1262 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
1263 #endif
1264 #ifdef HAVE_GSSAPI
1265 	case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
1266 #endif
1267 		iph1->hash = oakley_ph1hash_base_r(iph1, GENERATE);
1268 		break;
1269 	default:
1270 		plog(LLV_ERROR, LOCATION, NULL,
1271 			"invalid authentication method %d\n",
1272 			iph1->approval->authmethod);
1273 		goto end;
1274 	}
1275 	if (iph1->hash == NULL)
1276 		goto end;
1277 
1278 	switch (AUTHMETHOD(iph1)) {
1279 	case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
1280 #ifdef ENABLE_HYBRID
1281 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
1282 #endif
1283 		vid = set_vendorid(iph1->approval->vendorid);
1284 
1285 		/* create isakmp KE payload */
1286 		plist = isakmp_plist_append(plist,
1287 		    iph1->dhpub, ISAKMP_NPTYPE_KE);
1288 
1289 		/* create isakmp HASH payload */
1290 		plist = isakmp_plist_append(plist,
1291 		    iph1->hash, ISAKMP_NPTYPE_HASH);
1292 
1293 		/* append vendor id, if needed */
1294 		if (vid)
1295 			plist = isakmp_plist_append(plist,
1296 			    vid, ISAKMP_NPTYPE_VID);
1297 		break;
1298 	case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
1299 	case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
1300 #ifdef ENABLE_HYBRID
1301 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
1302 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
1303 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
1304 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
1305 #endif
1306 		/* XXX if there is CR or not ? */
1307 
1308 		if (oakley_getmycert(iph1) < 0)
1309 			goto end;
1310 
1311 		if (oakley_getsign(iph1) < 0)
1312 			goto end;
1313 
1314 		if (iph1->cert && iph1->rmconf->send_cert)
1315 			need_cert = 1;
1316 
1317 		/* create isakmp KE payload */
1318 		plist = isakmp_plist_append(plist,
1319 		    iph1->dhpub, ISAKMP_NPTYPE_KE);
1320 
1321 		/* add CERT payload if there */
1322 		if (need_cert)
1323 			plist = isakmp_plist_append(plist,
1324 			    iph1->cert->pl, ISAKMP_NPTYPE_CERT);
1325 		/* add SIG payload */
1326 		plist = isakmp_plist_append(plist,
1327 		    iph1->sig, ISAKMP_NPTYPE_SIG);
1328 		break;
1329 #ifdef HAVE_GSSAPI
1330 	case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
1331 		/* ... */
1332 		break;
1333 #endif
1334 	case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
1335 	case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
1336 #ifdef ENABLE_HYBRID
1337 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
1338 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
1339 #endif
1340 		break;
1341 	}
1342 
1343 #ifdef ENABLE_NATT
1344 	/* generate NAT-D payloads */
1345 	if (NATT_AVAILABLE(iph1)) {
1346 		vchar_t *natd[2] = { NULL, NULL };
1347 
1348 		plog(LLV_INFO, LOCATION,
1349 		    NULL, "Adding remote and local NAT-D payloads.\n");
1350 		if ((natd[0] = natt_hash_addr(iph1, iph1->remote)) == NULL) {
1351 			plog(LLV_ERROR, LOCATION, NULL,
1352 			    "NAT-D hashing failed for %s\n",
1353 			    saddr2str(iph1->remote));
1354 			goto end;
1355 		}
1356 
1357 		if ((natd[1] = natt_hash_addr(iph1, iph1->local)) == NULL) {
1358 			plog(LLV_ERROR, LOCATION, NULL,
1359 			    "NAT-D hashing failed for %s\n",
1360 			    saddr2str(iph1->local));
1361 			goto end;
1362 		}
1363 
1364 		plist = isakmp_plist_append(plist,
1365 		    natd[0], iph1->natt_options->payload_nat_d);
1366 		plist = isakmp_plist_append(plist,
1367 		    natd[1], iph1->natt_options->payload_nat_d);
1368 	}
1369 #endif
1370 
1371 	iph1->sendbuf = isakmp_plist_set_all(&plist, iph1);
1372 
1373 #ifdef HAVE_PRINT_ISAKMP_C
1374 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
1375 #endif
1376 
1377 	/* send HDR;KE;NONCE to responder */
1378 	if (isakmp_send(iph1, iph1->sendbuf) < 0)
1379 		goto end;
1380 
1381 	/* the sending message is added to the received-list. */
1382 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1383 		plog(LLV_ERROR , LOCATION, NULL,
1384 			"failed to add a response packet to the tree.\n");
1385 		goto end;
1386 	}
1387 
1388 	/* generate SKEYIDs & IV & final cipher key */
1389 	if (oakley_skeyid_dae(iph1) < 0)
1390 		goto end;
1391 	if (oakley_compute_enckey(iph1) < 0)
1392 		goto end;
1393 	if (oakley_newiv(iph1) < 0)
1394 		goto end;
1395 
1396 	/* set encryption flag */
1397 	iph1->flags |= ISAKMP_FLAG_E;
1398 
1399 	iph1->status = PHASE1ST_ESTABLISHED;
1400 
1401 	error = 0;
1402 
1403 end:
1404 	if (vid)
1405 		vfree(vid);
1406 	return error;
1407 }
1408