1 /*	$NetBSD: isakmp_ident.c,v 1.6 2006/10/02 21:41:59 manu Exp $	*/
2 
3 /* Id: isakmp_ident.c,v 1.21 2006/04/06 16:46:08 manubsd 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 /* Identity Protecion Exchange (Main 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 #include "localconf.h"
65 #include "remoteconf.h"
66 #include "isakmp_var.h"
67 #include "isakmp.h"
68 #include "evt.h"
69 #include "oakley.h"
70 #include "handler.h"
71 #include "ipsec_doi.h"
72 #include "crypto_openssl.h"
73 #include "pfkey.h"
74 #include "isakmp_ident.h"
75 #include "isakmp_inf.h"
76 #include "vendorid.h"
77 
78 #ifdef ENABLE_NATT
79 #include "nattraversal.h"
80 #endif
81 #ifdef HAVE_GSSAPI
82 #include "gssapi.h"
83 #endif
84 #ifdef ENABLE_HYBRID
85 #include <resolv.h>
86 #include "isakmp_xauth.h"
87 #include "isakmp_cfg.h"
88 #endif
89 #ifdef ENABLE_FRAG
90 #include "isakmp_frag.h"
91 #endif
92 
93 static vchar_t *ident_ir2mx __P((struct ph1handle *));
94 static vchar_t *ident_ir3mx __P((struct ph1handle *));
95 
96 /* %%%
97  * begin Identity Protection Mode as initiator.
98  */
99 /*
100  * send to responder
101  * 	psk: HDR, SA
102  * 	sig: HDR, SA
103  * 	rsa: HDR, SA
104  * 	rev: HDR, SA
105  */
106 int
ident_i1send(iph1,msg)107 ident_i1send(iph1, msg)
108 	struct ph1handle *iph1;
109 	vchar_t *msg; /* must be null */
110 {
111 	struct payload_list *plist = NULL;
112 	int error = -1;
113 #ifdef ENABLE_NATT
114 	vchar_t *vid_natt[MAX_NATT_VID_COUNT] = { NULL };
115 	int i;
116 #endif
117 #ifdef ENABLE_HYBRID
118 	vchar_t *vid_xauth = NULL;
119 	vchar_t *vid_unity = NULL;
120 #endif
121 #ifdef ENABLE_FRAG
122 	vchar_t *vid_frag = NULL;
123 #endif
124 #ifdef ENABLE_DPD
125 	vchar_t *vid_dpd = NULL;
126 #endif
127 	/* validity check */
128 	if (msg != NULL) {
129 		plog(LLV_ERROR, LOCATION, NULL,
130 			"msg has to be NULL in this function.\n");
131 		goto end;
132 	}
133 	if (iph1->status != PHASE1ST_START) {
134 		plog(LLV_ERROR, LOCATION, NULL,
135 			"status mismatched %d.\n", iph1->status);
136 		goto end;
137 	}
138 
139 	/* create isakmp index */
140 	memset(&iph1->index, 0, sizeof(iph1->index));
141 	isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local);
142 
143 	/* create SA payload for my proposal */
144 	iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf->proposal);
145 	if (iph1->sa == NULL)
146 		goto end;
147 
148 	/* set SA payload to propose */
149 	plist = isakmp_plist_append(plist, iph1->sa, ISAKMP_NPTYPE_SA);
150 
151 #ifdef ENABLE_NATT
152 	/* set VID payload for NAT-T if NAT-T support allowed in the config file */
153 	if (iph1->rmconf->nat_traversal)
154 		plist = isakmp_plist_append_natt_vids(plist, vid_natt);
155 #endif
156 #ifdef ENABLE_HYBRID
157 	/* Do we need Xauth VID? */
158 	switch (RMAUTHMETHOD(iph1)) {
159 	case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
160 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
161 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
162 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
163 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
164 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
165 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
166 		if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL)
167 			plog(LLV_ERROR, LOCATION, NULL,
168 			     "Xauth vendor ID generation failed\n");
169 		else
170 			plist = isakmp_plist_append(plist,
171 			    vid_xauth, ISAKMP_NPTYPE_VID);
172 
173 		if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL)
174 			plog(LLV_ERROR, LOCATION, NULL,
175 			     "Unity vendor ID generation failed\n");
176 		else
177                 	plist = isakmp_plist_append(plist,
178 			    vid_unity, ISAKMP_NPTYPE_VID);
179 		break;
180 	default:
181 		break;
182 	}
183 #endif
184 #ifdef ENABLE_FRAG
185 	if (iph1->rmconf->ike_frag) {
186 		if ((vid_frag = set_vendorid(VENDORID_FRAG)) == NULL) {
187 			plog(LLV_ERROR, LOCATION, NULL,
188 			    "Frag vendorID construction failed\n");
189 		} else {
190 			vid_frag = isakmp_frag_addcap(vid_frag,
191 			    VENDORID_FRAG_IDENT);
192 			plist = isakmp_plist_append(plist,
193 			    vid_frag, ISAKMP_NPTYPE_VID);
194 		}
195 	}
196 #endif
197 #ifdef ENABLE_DPD
198 	if(iph1->rmconf->dpd){
199 		vid_dpd = set_vendorid(VENDORID_DPD);
200 		if (vid_dpd != NULL)
201 			plist = isakmp_plist_append(plist, vid_dpd,
202 			    ISAKMP_NPTYPE_VID);
203 	}
204 #endif
205 
206 	iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
207 
208 #ifdef HAVE_PRINT_ISAKMP_C
209 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
210 #endif
211 
212 	/* send the packet, add to the schedule to resend */
213 	iph1->retry_counter = iph1->rmconf->retry_counter;
214 	if (isakmp_ph1resend(iph1) == -1)
215 		goto end;
216 
217 	iph1->status = PHASE1ST_MSG1SENT;
218 
219 	error = 0;
220 
221 end:
222 #ifdef ENABLE_FRAG
223 	if (vid_frag)
224 		vfree(vid_frag);
225 #endif
226 #ifdef ENABLE_NATT
227 	for (i = 0; i < MAX_NATT_VID_COUNT && vid_natt[i] != NULL; i++)
228 		vfree(vid_natt[i]);
229 #endif
230 #ifdef ENABLE_HYBRID
231 	if (vid_xauth != NULL)
232 		vfree(vid_xauth);
233 	if (vid_unity != NULL)
234 		vfree(vid_unity);
235 #endif
236 #ifdef ENABLE_DPD
237 	if (vid_dpd != NULL)
238 		vfree(vid_dpd);
239 #endif
240 
241 	return error;
242 }
243 
244 /*
245  * receive from responder
246  * 	psk: HDR, SA
247  * 	sig: HDR, SA
248  * 	rsa: HDR, SA
249  * 	rev: HDR, SA
250  */
251 int
ident_i2recv(iph1,msg)252 ident_i2recv(iph1, msg)
253 	struct ph1handle *iph1;
254 	vchar_t *msg;
255 {
256 	vchar_t *pbuf = NULL;
257 	struct isakmp_parse_t *pa;
258 	vchar_t *satmp = NULL;
259 	int error = -1;
260 	int vid_numeric;
261 
262 	/* validity check */
263 	if (iph1->status != PHASE1ST_MSG1SENT) {
264 		plog(LLV_ERROR, LOCATION, NULL,
265 			"status mismatched %d.\n", iph1->status);
266 		goto end;
267 	}
268 
269 	/* validate the type of next payload */
270 	/*
271 	 * NOTE: RedCreek(as responder) attaches N[responder-lifetime] here,
272 	 *	if proposal-lifetime > lifetime-redcreek-wants.
273 	 *	(see doi-08 4.5.4)
274 	 *	=> According to the seciton 4.6.3 in RFC 2407, This is illegal.
275 	 * NOTE: we do not really care about ordering of VID and N.
276 	 *	does it matters?
277 	 * NOTE: even if there's multiple VID/N, we'll ignore them.
278 	 */
279 	pbuf = isakmp_parse(msg);
280 	if (pbuf == NULL)
281 		goto end;
282 	pa = (struct isakmp_parse_t *)pbuf->v;
283 
284 	/* SA payload is fixed postion */
285 	if (pa->type != ISAKMP_NPTYPE_SA) {
286 		plog(LLV_ERROR, LOCATION, iph1->remote,
287 			"received invalid next payload type %d, "
288 			"expecting %d.\n",
289 			pa->type, ISAKMP_NPTYPE_SA);
290 		goto end;
291 	}
292 	if (isakmp_p2ph(&satmp, pa->ptr) < 0)
293 		goto end;
294 	pa++;
295 
296 	for (/*nothing*/;
297 	     pa->type != ISAKMP_NPTYPE_NONE;
298 	     pa++) {
299 
300 		switch (pa->type) {
301 		case ISAKMP_NPTYPE_VID:
302 			handle_vendorid(iph1, pa->ptr);
303 			break;
304 		default:
305 			/* don't send information, see ident_r1recv() */
306 			plog(LLV_ERROR, LOCATION, iph1->remote,
307 				"ignore the packet, "
308 				"received unexpecting payload type %d.\n",
309 				pa->type);
310 			goto end;
311 		}
312 	}
313 
314 #ifdef ENABLE_NATT
315 	if (NATT_AVAILABLE(iph1))
316 		plog(LLV_INFO, LOCATION, iph1->remote,
317 		     "Selected NAT-T version: %s\n",
318 		     vid_string_by_id(iph1->natt_options->version));
319 #endif
320 
321 	/* check SA payload and set approval SA for use */
322 	if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) {
323 		plog(LLV_ERROR, LOCATION, iph1->remote,
324 			"failed to get valid proposal.\n");
325 		/* XXX send information */
326 		goto end;
327 	}
328 	VPTRINIT(iph1->sa_ret);
329 
330 	iph1->status = PHASE1ST_MSG2RECEIVED;
331 
332 	error = 0;
333 
334 end:
335 	if (pbuf)
336 		vfree(pbuf);
337 	if (satmp)
338 		vfree(satmp);
339 	return error;
340 }
341 
342 /*
343  * send to responder
344  * 	psk: HDR, KE, Ni
345  * 	sig: HDR, KE, Ni
346  *   gssapi: HDR, KE, Ni, GSSi
347  * 	rsa: HDR, KE, [ HASH(1), ] <IDi1_b>PubKey_r, <Ni_b>PubKey_r
348  * 	rev: HDR, [ HASH(1), ] <Ni_b>Pubkey_r, <KE_b>Ke_i,
349  * 	          <IDi1_b>Ke_i, [<<Cert-I_b>Ke_i]
350  */
351 int
ident_i2send(iph1,msg)352 ident_i2send(iph1, msg)
353 	struct ph1handle *iph1;
354 	vchar_t *msg;
355 {
356 	int error = -1;
357 
358 	/* validity check */
359 	if (iph1->status != PHASE1ST_MSG2RECEIVED) {
360 		plog(LLV_ERROR, LOCATION, NULL,
361 			"status mismatched %d.\n", iph1->status);
362 		goto end;
363 	}
364 
365 	/* fix isakmp index */
366 	memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck,
367 		sizeof(cookie_t));
368 
369 	/* generate DH public value */
370 	if (oakley_dh_generate(iph1->approval->dhgrp,
371 				&iph1->dhpub, &iph1->dhpriv) < 0)
372 		goto end;
373 
374 	/* generate NONCE value */
375 	iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
376 	if (iph1->nonce == NULL)
377 		goto end;
378 
379 #ifdef HAVE_GSSAPI
380 	if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB &&
381 	    gssapi_get_itoken(iph1, NULL) < 0)
382 		goto end;
383 #endif
384 
385 	/* create buffer to send isakmp payload */
386 	iph1->sendbuf = ident_ir2mx(iph1);
387 	if (iph1->sendbuf == NULL)
388 		goto end;
389 
390 #ifdef HAVE_PRINT_ISAKMP_C
391 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
392 #endif
393 
394 	/* send the packet, add to the schedule to resend */
395 	iph1->retry_counter = iph1->rmconf->retry_counter;
396 	if (isakmp_ph1resend(iph1) == -1)
397 		goto end;
398 
399 	/* the sending message is added to the received-list. */
400 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
401 		plog(LLV_ERROR , LOCATION, NULL,
402 			"failed to add a response packet to the tree.\n");
403 		goto end;
404 	}
405 
406 	iph1->status = PHASE1ST_MSG2SENT;
407 
408 	error = 0;
409 
410 end:
411 	return error;
412 }
413 
414 /*
415  * receive from responder
416  * 	psk: HDR, KE, Nr
417  * 	sig: HDR, KE, Nr [, CR ]
418  *   gssapi: HDR, KE, Nr, GSSr
419  * 	rsa: HDR, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i
420  * 	rev: HDR, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDr1_b>Ke_r,
421  */
422 int
ident_i3recv(iph1,msg)423 ident_i3recv(iph1, msg)
424 	struct ph1handle *iph1;
425 	vchar_t *msg;
426 {
427 	vchar_t *pbuf = NULL;
428 	struct isakmp_parse_t *pa;
429 	int error = -1;
430 #ifdef HAVE_GSSAPI
431 	vchar_t *gsstoken = NULL;
432 #endif
433 #ifdef ENABLE_NATT
434 	vchar_t	*natd_received;
435 	int natd_seq = 0, natd_verified;
436 #endif
437 
438 	/* validity check */
439 	if (iph1->status != PHASE1ST_MSG2SENT) {
440 		plog(LLV_ERROR, LOCATION, NULL,
441 			"status mismatched %d.\n", iph1->status);
442 		goto end;
443 	}
444 
445 	/* validate the type of next payload */
446 	pbuf = isakmp_parse(msg);
447 	if (pbuf == NULL)
448 		goto end;
449 
450 	for (pa = (struct isakmp_parse_t *)pbuf->v;
451 	     pa->type != ISAKMP_NPTYPE_NONE;
452 	     pa++) {
453 
454 		switch (pa->type) {
455 		case ISAKMP_NPTYPE_KE:
456 			if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
457 				goto end;
458 			break;
459 		case ISAKMP_NPTYPE_NONCE:
460 			if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
461 				goto end;
462 			break;
463 		case ISAKMP_NPTYPE_VID:
464 			handle_vendorid(iph1, pa->ptr);
465 			break;
466 		case ISAKMP_NPTYPE_CR:
467 			if (oakley_savecr(iph1, pa->ptr) < 0)
468 				goto end;
469 			break;
470 #ifdef HAVE_GSSAPI
471 		case ISAKMP_NPTYPE_GSS:
472 			if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
473 				goto end;
474 			gssapi_save_received_token(iph1, gsstoken);
475 			break;
476 #endif
477 
478 #ifdef ENABLE_NATT
479 		case ISAKMP_NPTYPE_NATD_DRAFT:
480 		case ISAKMP_NPTYPE_NATD_RFC:
481 			if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL &&
482 			    pa->type == iph1->natt_options->payload_nat_d) {
483 				natd_received = NULL;
484 				if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
485 					goto end;
486 
487 				/* set both bits first so that we can clear them
488 				   upon verifying hashes */
489 				if (natd_seq == 0)
490 					iph1->natt_flags |= NAT_DETECTED;
491 
492 				/* this function will clear appropriate bits bits
493 				   from iph1->natt_flags */
494 				natd_verified = natt_compare_addr_hash (iph1,
495 					natd_received, natd_seq++);
496 
497 				plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
498 					natd_seq - 1,
499 					natd_verified ? "verified" : "doesn't match");
500 
501 				vfree (natd_received);
502 				break;
503 			}
504 			/* passthrough to default... */
505 #endif
506 
507 		default:
508 			/* don't send information, see ident_r1recv() */
509 			plog(LLV_ERROR, LOCATION, iph1->remote,
510 				"ignore the packet, "
511 				"received unexpecting payload type %d.\n",
512 				pa->type);
513 			goto end;
514 		}
515 	}
516 
517 #ifdef ENABLE_NATT
518 	if (NATT_AVAILABLE(iph1)) {
519 		plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
520 		      iph1->natt_flags & NAT_DETECTED ?
521 		      		"detected:" : "not detected",
522 		      iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
523 		      iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
524 		if (iph1->natt_flags & NAT_DETECTED)
525 			natt_float_ports (iph1);
526 	}
527 #endif
528 
529 	/* payload existency check */
530 	if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) {
531 		plog(LLV_ERROR, LOCATION, iph1->remote,
532 			"few isakmp message received.\n");
533 		goto end;
534 	}
535 
536 	if (oakley_checkcr(iph1) < 0) {
537 		/* Ignore this error in order to be interoperability. */
538 		;
539 	}
540 
541 	iph1->status = PHASE1ST_MSG3RECEIVED;
542 
543 	error = 0;
544 
545 end:
546 #ifdef HAVE_GSSAPI
547 	if (gsstoken)
548 		vfree(gsstoken);
549 #endif
550 	if (pbuf)
551 		vfree(pbuf);
552 	if (error) {
553 		VPTRINIT(iph1->dhpub_p);
554 		VPTRINIT(iph1->nonce_p);
555 		VPTRINIT(iph1->id_p);
556 		oakley_delcert(iph1->cr_p);
557 		iph1->cr_p = NULL;
558 	}
559 
560 	return error;
561 }
562 
563 /*
564  * send to responder
565  * 	psk: HDR*, IDi1, HASH_I
566  * 	sig: HDR*, IDi1, [ CR, ] [ CERT, ] SIG_I
567  *   gssapi: HDR*, IDi1, < Gssi(n) | HASH_I >
568  * 	rsa: HDR*, HASH_I
569  * 	rev: HDR*, HASH_I
570  */
571 int
ident_i3send(iph1,msg0)572 ident_i3send(iph1, msg0)
573 	struct ph1handle *iph1;
574 	vchar_t *msg0;
575 {
576 	int error = -1;
577 	int dohash = 1;
578 #ifdef HAVE_GSSAPI
579 	int len;
580 #endif
581 
582 	/* validity check */
583 	if (iph1->status != PHASE1ST_MSG3RECEIVED) {
584 		plog(LLV_ERROR, LOCATION, NULL,
585 			"status mismatched %d.\n", iph1->status);
586 		goto end;
587 	}
588 
589 	/* compute sharing secret of DH */
590 	if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
591 				iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
592 		goto end;
593 
594 	/* generate SKEYIDs & IV & final cipher key */
595 	if (oakley_skeyid(iph1) < 0)
596 		goto end;
597 	if (oakley_skeyid_dae(iph1) < 0)
598 		goto end;
599 	if (oakley_compute_enckey(iph1) < 0)
600 		goto end;
601 	if (oakley_newiv(iph1) < 0)
602 		goto end;
603 
604 	/* make ID payload into isakmp status */
605 	if (ipsecdoi_setid1(iph1) < 0)
606 		goto end;
607 
608 #ifdef HAVE_GSSAPI
609 	if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB &&
610 	    gssapi_more_tokens(iph1)) {
611 		plog(LLV_DEBUG, LOCATION, NULL, "calling get_itoken\n");
612 		if (gssapi_get_itoken(iph1, &len) < 0)
613 			goto end;
614 		if (len != 0)
615 			dohash = 0;
616 	}
617 #endif
618 
619 	/* generate HASH to send */
620 	if (dohash) {
621 		iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
622 		if (iph1->hash == NULL)
623 			goto end;
624 	} else
625 		iph1->hash = NULL;
626 
627 	/* set encryption flag */
628 	iph1->flags |= ISAKMP_FLAG_E;
629 
630 	/* create HDR;ID;HASH payload */
631 	iph1->sendbuf = ident_ir3mx(iph1);
632 	if (iph1->sendbuf == NULL)
633 		goto end;
634 
635 	/* send the packet, add to the schedule to resend */
636 	iph1->retry_counter = iph1->rmconf->retry_counter;
637 	if (isakmp_ph1resend(iph1) == -1)
638 		goto end;
639 
640 	/* the sending message is added to the received-list. */
641 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg0) == -1) {
642 		plog(LLV_ERROR , LOCATION, NULL,
643 			"failed to add a response packet to the tree.\n");
644 		goto end;
645 	}
646 
647 	/* see handler.h about IV synchronization. */
648 	memcpy(iph1->ivm->ive->v, iph1->ivm->iv->v, iph1->ivm->iv->l);
649 
650 	iph1->status = PHASE1ST_MSG3SENT;
651 
652 	error = 0;
653 
654 end:
655 	return error;
656 }
657 
658 /*
659  * receive from responder
660  * 	psk: HDR*, IDr1, HASH_R
661  * 	sig: HDR*, IDr1, [ CERT, ] SIG_R
662  *   gssapi: HDR*, IDr1, < GSSr(n) | HASH_R >
663  * 	rsa: HDR*, HASH_R
664  * 	rev: HDR*, HASH_R
665  */
666 int
ident_i4recv(iph1,msg0)667 ident_i4recv(iph1, msg0)
668 	struct ph1handle *iph1;
669 	vchar_t *msg0;
670 {
671 	vchar_t *pbuf = NULL;
672 	struct isakmp_parse_t *pa;
673 	vchar_t *msg = NULL;
674 	int error = -1;
675 	int type;
676 #ifdef HAVE_GSSAPI
677 	vchar_t *gsstoken = NULL;
678 #endif
679 
680 	/* validity check */
681 	if (iph1->status != PHASE1ST_MSG3SENT) {
682 		plog(LLV_ERROR, LOCATION, NULL,
683 			"status mismatched %d.\n", iph1->status);
684 		goto end;
685 	}
686 
687 	/* decrypting */
688 	if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) {
689 		plog(LLV_ERROR, LOCATION, iph1->remote,
690 			"ignore the packet, "
691 			"expecting the packet encrypted.\n");
692 		goto end;
693 	}
694 	msg = oakley_do_decrypt(iph1, msg0, iph1->ivm->iv, iph1->ivm->ive);
695 	if (msg == NULL)
696 		goto end;
697 
698 	/* validate the type of next payload */
699 	pbuf = isakmp_parse(msg);
700 	if (pbuf == NULL)
701 		goto end;
702 
703 	iph1->pl_hash = NULL;
704 
705 	for (pa = (struct isakmp_parse_t *)pbuf->v;
706 	     pa->type != ISAKMP_NPTYPE_NONE;
707 	     pa++) {
708 
709 		switch (pa->type) {
710 		case ISAKMP_NPTYPE_ID:
711 			if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
712 				goto end;
713 			break;
714 		case ISAKMP_NPTYPE_HASH:
715 			iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
716 			break;
717 		case ISAKMP_NPTYPE_CERT:
718 			if (oakley_savecert(iph1, pa->ptr) < 0)
719 				goto end;
720 			break;
721 		case ISAKMP_NPTYPE_SIG:
722 			if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
723 				goto end;
724 			break;
725 #ifdef HAVE_GSSAPI
726 		case ISAKMP_NPTYPE_GSS:
727 			if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
728 				goto end;
729 			gssapi_save_received_token(iph1, gsstoken);
730 			break;
731 #endif
732 		case ISAKMP_NPTYPE_VID:
733 			handle_vendorid(iph1, pa->ptr);
734 			break;
735 		case ISAKMP_NPTYPE_N:
736 			isakmp_check_notify(pa->ptr, iph1);
737 			break;
738 		default:
739 			/* don't send information, see ident_r1recv() */
740 			plog(LLV_ERROR, LOCATION, iph1->remote,
741 				"ignore the packet, "
742 				"received unexpecting payload type %d.\n",
743 				pa->type);
744 			goto end;
745 		}
746 	}
747 
748 	/* payload existency check */
749 
750 	/* verify identifier */
751 	if (ipsecdoi_checkid1(iph1) != 0) {
752 		plog(LLV_ERROR, LOCATION, iph1->remote,
753 			"invalid ID payload.\n");
754 		goto end;
755 	}
756 
757 	/* validate authentication value */
758 #ifdef HAVE_GSSAPI
759 	if (gsstoken == NULL) {
760 #endif
761 		type = oakley_validate_auth(iph1);
762 		if (type != 0) {
763 			if (type == -1) {
764 				/* msg printed inner oakley_validate_auth() */
765 				goto end;
766 			}
767 			EVT_PUSH(iph1->local, iph1->remote,
768 			    EVTT_PEERPH1AUTH_FAILED, NULL);
769 			isakmp_info_send_n1(iph1, type, NULL);
770 			goto end;
771 		}
772 #ifdef HAVE_GSSAPI
773 	}
774 #endif
775 
776 	/*
777 	 * XXX: Should we do compare two addresses, ph1handle's and ID
778 	 * payload's.
779 	 */
780 
781 	plog(LLV_DEBUG, LOCATION, iph1->remote, "peer's ID:");
782 	plogdump(LLV_DEBUG, iph1->id_p->v, iph1->id_p->l);
783 
784 	/* see handler.h about IV synchronization. */
785 	memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->ive->l);
786 
787 	/*
788 	 * If we got a GSS token, we need to this roundtrip again.
789 	 */
790 #ifdef HAVE_GSSAPI
791 	iph1->status = gsstoken != 0 ? PHASE1ST_MSG3RECEIVED :
792 	    PHASE1ST_MSG4RECEIVED;
793 #else
794 	iph1->status = PHASE1ST_MSG4RECEIVED;
795 #endif
796 
797 	error = 0;
798 
799 end:
800 	if (pbuf)
801 		vfree(pbuf);
802 	if (msg)
803 		vfree(msg);
804 #ifdef HAVE_GSSAPI
805 	if (gsstoken)
806 		vfree(gsstoken);
807 #endif
808 
809 	if (error) {
810 		VPTRINIT(iph1->id_p);
811 		oakley_delcert(iph1->cert_p);
812 		iph1->cert_p = NULL;
813 		oakley_delcert(iph1->crl_p);
814 		iph1->crl_p = NULL;
815 		VPTRINIT(iph1->sig_p);
816 	}
817 
818 	return error;
819 }
820 
821 /*
822  * status update and establish isakmp sa.
823  */
824 int
ident_i4send(iph1,msg)825 ident_i4send(iph1, msg)
826 	struct ph1handle *iph1;
827 	vchar_t *msg;
828 {
829 	int error = -1;
830 
831 	/* validity check */
832 	if (iph1->status != PHASE1ST_MSG4RECEIVED) {
833 		plog(LLV_ERROR, LOCATION, NULL,
834 			"status mismatched %d.\n", iph1->status);
835 		goto end;
836 	}
837 
838 	/* see handler.h about IV synchronization. */
839 	memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l);
840 
841 	iph1->status = PHASE1ST_ESTABLISHED;
842 
843 	error = 0;
844 
845 end:
846 	return error;
847 }
848 
849 /*
850  * receive from initiator
851  * 	psk: HDR, SA
852  * 	sig: HDR, SA
853  * 	rsa: HDR, SA
854  * 	rev: HDR, SA
855  */
856 int
ident_r1recv(iph1,msg)857 ident_r1recv(iph1, msg)
858 	struct ph1handle *iph1;
859 	vchar_t *msg;
860 {
861 	vchar_t *pbuf = NULL;
862 	struct isakmp_parse_t *pa;
863 	int error = -1;
864 	int vid_numeric;
865 
866 	/* validity check */
867 	if (iph1->status != PHASE1ST_START) {
868 		plog(LLV_ERROR, LOCATION, NULL,
869 			"status mismatched %d.\n", iph1->status);
870 		goto end;
871 	}
872 
873 	/* validate the type of next payload */
874 	/*
875 	 * NOTE: XXX even if multiple VID, we'll silently ignore those.
876 	 */
877 	pbuf = isakmp_parse(msg);
878 	if (pbuf == NULL)
879 		goto end;
880 	pa = (struct isakmp_parse_t *)pbuf->v;
881 
882 	/* check the position of SA payload */
883 	if (pa->type != ISAKMP_NPTYPE_SA) {
884 		plog(LLV_ERROR, LOCATION, iph1->remote,
885 			"received invalid next payload type %d, "
886 			"expecting %d.\n",
887 			pa->type, ISAKMP_NPTYPE_SA);
888 		goto end;
889 	}
890 	if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0)
891 		goto end;
892 	pa++;
893 
894 	for (/*nothing*/;
895 	     pa->type != ISAKMP_NPTYPE_NONE;
896 	     pa++) {
897 
898 		switch (pa->type) {
899 		case ISAKMP_NPTYPE_VID:
900 			vid_numeric = handle_vendorid(iph1, pa->ptr);
901 #ifdef ENABLE_FRAG
902 			if ((vid_numeric == VENDORID_FRAG) &&
903 			    (vendorid_frag_cap(pa->ptr) & VENDORID_FRAG_IDENT))
904 				iph1->frag = 1;
905 #endif
906 			break;
907 		default:
908 			/*
909 			 * We don't send information to the peer even
910 			 * if we received malformed packet.  Because we
911 			 * can't distinguish the malformed packet and
912 			 * the re-sent packet.  And we do same behavior
913 			 * when we expect encrypted packet.
914 			 */
915 			plog(LLV_ERROR, LOCATION, iph1->remote,
916 				"ignore the packet, "
917 				"received unexpecting payload type %d.\n",
918 				pa->type);
919 			goto end;
920 		}
921 	}
922 
923 #ifdef ENABLE_NATT
924 	if (NATT_AVAILABLE(iph1))
925 		plog(LLV_INFO, LOCATION, iph1->remote,
926 		     "Selected NAT-T version: %s\n",
927 		     vid_string_by_id(iph1->natt_options->version));
928 #endif
929 
930 	/* check SA payload and set approval SA for use */
931 	if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) {
932 		plog(LLV_ERROR, LOCATION, iph1->remote,
933 			"failed to get valid proposal.\n");
934 		/* XXX send information */
935 		goto end;
936 	}
937 
938 	iph1->status = PHASE1ST_MSG1RECEIVED;
939 
940 	error = 0;
941 
942 end:
943 	if (pbuf)
944 		vfree(pbuf);
945 	if (error) {
946 		VPTRINIT(iph1->sa);
947 	}
948 
949 	return error;
950 }
951 
952 /*
953  * send to initiator
954  * 	psk: HDR, SA
955  * 	sig: HDR, SA
956  * 	rsa: HDR, SA
957  * 	rev: HDR, SA
958  */
959 int
ident_r1send(iph1,msg)960 ident_r1send(iph1, msg)
961 	struct ph1handle *iph1;
962 	vchar_t *msg;
963 {
964 	struct payload_list *plist = NULL;
965 	int error = -1;
966 	vchar_t *gss_sa = NULL;
967 #ifdef HAVE_GSSAPI
968 	int free_gss_sa = 0;
969 #endif
970 #ifdef ENABLE_NATT
971 	vchar_t *vid_natt = NULL;
972 #endif
973 #ifdef ENABLE_HYBRID
974         vchar_t *vid_xauth = NULL;
975         vchar_t *vid_unity = NULL;
976 #endif
977 #ifdef ENABLE_DPD
978 	vchar_t *vid_dpd = NULL;
979 #endif
980 #ifdef ENABLE_FRAG
981 	vchar_t *vid_frag = NULL;
982 #endif
983 
984 	/* validity check */
985 	if (iph1->status != PHASE1ST_MSG1RECEIVED) {
986 		plog(LLV_ERROR, LOCATION, NULL,
987 			"status mismatched %d.\n", iph1->status);
988 		goto end;
989 	}
990 
991 	/* set responder's cookie */
992 	isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local);
993 
994 #ifdef HAVE_GSSAPI
995 	if (iph1->approval->gssid != NULL) {
996 		gss_sa = ipsecdoi_setph1proposal(iph1->approval);
997 		if (gss_sa != iph1->sa_ret)
998 			free_gss_sa = 1;
999 	} else
1000 #endif
1001 		gss_sa = iph1->sa_ret;
1002 
1003 	/* set SA payload to reply */
1004 	plist = isakmp_plist_append(plist, gss_sa, ISAKMP_NPTYPE_SA);
1005 
1006 #ifdef ENABLE_HYBRID
1007 	if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) {
1008 		plog (LLV_INFO, LOCATION, NULL, "Adding xauth VID payload.\n");
1009 		if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL) {
1010 			plog(LLV_ERROR, LOCATION, NULL,
1011 			    "Cannot create Xauth vendor ID\n");
1012 			goto end;
1013 		}
1014 		plist = isakmp_plist_append(plist,
1015 		    vid_xauth, ISAKMP_NPTYPE_VID);
1016 	}
1017 
1018 	if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_UNITY) {
1019 		if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL) {
1020 			plog(LLV_ERROR, LOCATION, NULL,
1021 			    "Cannot create Unity vendor ID\n");
1022 			goto end;
1023 		}
1024 		plist = isakmp_plist_append(plist,
1025 		    vid_unity, ISAKMP_NPTYPE_VID);
1026 	}
1027 #endif
1028 #ifdef ENABLE_NATT
1029 	/* Has the peer announced NAT-T? */
1030 	if (NATT_AVAILABLE(iph1))
1031 		vid_natt = set_vendorid(iph1->natt_options->version);
1032 
1033 	if (vid_natt)
1034 		plist = isakmp_plist_append(plist, vid_natt, ISAKMP_NPTYPE_VID);
1035 #endif
1036 #ifdef ENABLE_DPD
1037 	/* XXX only send DPD VID if remote sent it ? */
1038 	if(iph1->rmconf->dpd){
1039 		vid_dpd = set_vendorid(VENDORID_DPD);
1040 		if (vid_dpd != NULL)
1041 			plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID);
1042 	}
1043 #endif
1044 #ifdef ENABLE_FRAG
1045 	if (iph1->frag) {
1046 		vid_frag = set_vendorid(VENDORID_FRAG);
1047 		if (vid_frag != NULL)
1048 			vid_frag = isakmp_frag_addcap(vid_frag,
1049 			    VENDORID_FRAG_IDENT);
1050 		if (vid_frag == NULL)
1051 			plog(LLV_ERROR, LOCATION, NULL,
1052 			    "Frag vendorID construction failed\n");
1053 		else
1054 			plist = isakmp_plist_append(plist,
1055 			     vid_frag, ISAKMP_NPTYPE_VID);
1056 	}
1057 #endif
1058 
1059 	iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
1060 
1061 #ifdef HAVE_PRINT_ISAKMP_C
1062 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
1063 #endif
1064 
1065 	/* send the packet, add to the schedule to resend */
1066 	iph1->retry_counter = iph1->rmconf->retry_counter;
1067 	if (isakmp_ph1resend(iph1) == -1) {
1068 		goto end;
1069 	}
1070 
1071 	/* the sending message is added to the received-list. */
1072 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1073 		plog(LLV_ERROR , LOCATION, NULL,
1074 			"failed to add a response packet to the tree.\n");
1075 		goto end;
1076 	}
1077 
1078 	iph1->status = PHASE1ST_MSG1SENT;
1079 
1080 	error = 0;
1081 
1082 end:
1083 #ifdef HAVE_GSSAPI
1084 	if (free_gss_sa)
1085 		vfree(gss_sa);
1086 #endif
1087 #ifdef ENABLE_NATT
1088 	if (vid_natt)
1089 		vfree(vid_natt);
1090 #endif
1091 #ifdef ENABLE_HYBRID
1092 	if (vid_xauth != NULL)
1093 		vfree(vid_xauth);
1094 	if (vid_unity != NULL)
1095 		vfree(vid_unity);
1096 #endif
1097 #ifdef ENABLE_DPD
1098 	if (vid_dpd != NULL)
1099 		vfree(vid_dpd);
1100 #endif
1101 #ifdef ENABLE_FRAG
1102 	if (vid_frag != NULL)
1103 		vfree(vid_frag);
1104 #endif
1105 
1106 	return error;
1107 }
1108 
1109 /*
1110  * receive from initiator
1111  * 	psk: HDR, KE, Ni
1112  * 	sig: HDR, KE, Ni
1113  *   gssapi: HDR, KE, Ni, GSSi
1114  * 	rsa: HDR, KE, [ HASH(1), ] <IDi1_b>PubKey_r, <Ni_b>PubKey_r
1115  * 	rev: HDR, [ HASH(1), ] <Ni_b>Pubkey_r, <KE_b>Ke_i,
1116  * 	          <IDi1_b>Ke_i, [<<Cert-I_b>Ke_i]
1117  */
1118 int
ident_r2recv(iph1,msg)1119 ident_r2recv(iph1, msg)
1120 	struct ph1handle *iph1;
1121 	vchar_t *msg;
1122 {
1123 	vchar_t *pbuf = NULL;
1124 	struct isakmp_parse_t *pa;
1125 	int error = -1;
1126 #ifdef HAVE_GSSAPI
1127 	vchar_t *gsstoken = NULL;
1128 #endif
1129 #ifdef ENABLE_NATT
1130 	int natd_seq = 0;
1131 #endif
1132 
1133 	/* validity check */
1134 	if (iph1->status != PHASE1ST_MSG1SENT) {
1135 		plog(LLV_ERROR, LOCATION, NULL,
1136 			"status mismatched %d.\n", iph1->status);
1137 		goto end;
1138 	}
1139 
1140 	/* validate the type of next payload */
1141 	pbuf = isakmp_parse(msg);
1142 	if (pbuf == NULL)
1143 		goto end;
1144 
1145 	for (pa = (struct isakmp_parse_t *)pbuf->v;
1146 	     pa->type != ISAKMP_NPTYPE_NONE;
1147 	     pa++) {
1148 		switch (pa->type) {
1149 		case ISAKMP_NPTYPE_KE:
1150 			if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
1151 				goto end;
1152 			break;
1153 		case ISAKMP_NPTYPE_NONCE:
1154 			if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
1155 				goto end;
1156 			break;
1157 		case ISAKMP_NPTYPE_VID:
1158 			handle_vendorid(iph1, pa->ptr);
1159 			break;
1160 		case ISAKMP_NPTYPE_CR:
1161 			plog(LLV_WARNING, LOCATION, iph1->remote,
1162 				"CR received, ignore it. "
1163 				"It should be in other exchange.\n");
1164 			break;
1165 #ifdef HAVE_GSSAPI
1166 		case ISAKMP_NPTYPE_GSS:
1167 			if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
1168 				goto end;
1169 			gssapi_save_received_token(iph1, gsstoken);
1170 			break;
1171 #endif
1172 
1173 #ifdef ENABLE_NATT
1174 		case ISAKMP_NPTYPE_NATD_DRAFT:
1175 		case ISAKMP_NPTYPE_NATD_RFC:
1176 			if (NATT_AVAILABLE(iph1) && iph1->natt_options != NULL &&
1177 				pa->type == iph1->natt_options->payload_nat_d)
1178 			{
1179 				vchar_t *natd_received = NULL;
1180 				int natd_verified;
1181 
1182 				if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
1183 					goto end;
1184 
1185 				if (natd_seq == 0)
1186 					iph1->natt_flags |= NAT_DETECTED;
1187 
1188 				natd_verified = natt_compare_addr_hash (iph1,
1189 					natd_received, natd_seq++);
1190 
1191 				plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
1192 					natd_seq - 1,
1193 					natd_verified ? "verified" : "doesn't match");
1194 
1195 				vfree (natd_received);
1196 				break;
1197 			}
1198 			/* passthrough to default... */
1199 #endif
1200 
1201 		default:
1202 			/* don't send information, see ident_r1recv() */
1203 			plog(LLV_ERROR, LOCATION, iph1->remote,
1204 				"ignore the packet, "
1205 				"received unexpecting payload type %d.\n",
1206 				pa->type);
1207 			goto end;
1208 		}
1209 	}
1210 
1211 #ifdef ENABLE_NATT
1212 	if (NATT_AVAILABLE(iph1))
1213 		plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
1214 		      iph1->natt_flags & NAT_DETECTED ?
1215 		      		"detected:" : "not detected",
1216 		      iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
1217 		      iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
1218 #endif
1219 
1220 	/* payload existency check */
1221 	if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) {
1222 		plog(LLV_ERROR, LOCATION, iph1->remote,
1223 			"few isakmp message received.\n");
1224 		goto end;
1225 	}
1226 
1227 	iph1->status = PHASE1ST_MSG2RECEIVED;
1228 
1229 	error = 0;
1230 
1231 end:
1232 	if (pbuf)
1233 		vfree(pbuf);
1234 #ifdef HAVE_GSSAPI
1235 	if (gsstoken)
1236 		vfree(gsstoken);
1237 #endif
1238 
1239 	if (error) {
1240 		VPTRINIT(iph1->dhpub_p);
1241 		VPTRINIT(iph1->nonce_p);
1242 		VPTRINIT(iph1->id_p);
1243 	}
1244 
1245 	return error;
1246 }
1247 
1248 /*
1249  * send to initiator
1250  * 	psk: HDR, KE, Nr
1251  * 	sig: HDR, KE, Nr [, CR ]
1252  *   gssapi: HDR, KE, Nr, GSSr
1253  * 	rsa: HDR, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i
1254  * 	rev: HDR, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDr1_b>Ke_r,
1255  */
1256 int
ident_r2send(iph1,msg)1257 ident_r2send(iph1, msg)
1258 	struct ph1handle *iph1;
1259 	vchar_t *msg;
1260 {
1261 	int error = -1;
1262 
1263 	/* validity check */
1264 	if (iph1->status != PHASE1ST_MSG2RECEIVED) {
1265 		plog(LLV_ERROR, LOCATION, NULL,
1266 			"status mismatched %d.\n", iph1->status);
1267 		goto end;
1268 	}
1269 
1270 	/* generate DH public value */
1271 	if (oakley_dh_generate(iph1->approval->dhgrp,
1272 				&iph1->dhpub, &iph1->dhpriv) < 0)
1273 		goto end;
1274 
1275 	/* generate NONCE value */
1276 	iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
1277 	if (iph1->nonce == NULL)
1278 		goto end;
1279 
1280 #ifdef HAVE_GSSAPI
1281 	if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
1282 		gssapi_get_rtoken(iph1, NULL);
1283 #endif
1284 
1285 	/* create HDR;KE;NONCE payload */
1286 	iph1->sendbuf = ident_ir2mx(iph1);
1287 	if (iph1->sendbuf == NULL)
1288 		goto end;
1289 
1290 #ifdef HAVE_PRINT_ISAKMP_C
1291 	isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
1292 #endif
1293 
1294 	/* send the packet, add to the schedule to resend */
1295 	iph1->retry_counter = iph1->rmconf->retry_counter;
1296 	if (isakmp_ph1resend(iph1) == -1)
1297 		goto end;
1298 
1299 	/* the sending message is added to the received-list. */
1300 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1301 		plog(LLV_ERROR , LOCATION, NULL,
1302 			"failed to add a response packet to the tree.\n");
1303 		goto end;
1304 	}
1305 
1306 	/* compute sharing secret of DH */
1307 	if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
1308 				iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
1309 		goto end;
1310 
1311 	/* generate SKEYIDs & IV & final cipher key */
1312 	if (oakley_skeyid(iph1) < 0)
1313 		goto end;
1314 	if (oakley_skeyid_dae(iph1) < 0)
1315 		goto end;
1316 	if (oakley_compute_enckey(iph1) < 0)
1317 		goto end;
1318 	if (oakley_newiv(iph1) < 0)
1319 		goto end;
1320 
1321 	iph1->status = PHASE1ST_MSG2SENT;
1322 
1323 	error = 0;
1324 
1325 end:
1326 	return error;
1327 }
1328 
1329 /*
1330  * receive from initiator
1331  * 	psk: HDR*, IDi1, HASH_I
1332  * 	sig: HDR*, IDi1, [ CR, ] [ CERT, ] SIG_I
1333  *   gssapi: HDR*, [ IDi1, ] < GSSi(n) | HASH_I >
1334  * 	rsa: HDR*, HASH_I
1335  * 	rev: HDR*, HASH_I
1336  */
1337 int
ident_r3recv(iph1,msg0)1338 ident_r3recv(iph1, msg0)
1339 	struct ph1handle *iph1;
1340 	vchar_t *msg0;
1341 {
1342 	vchar_t *msg = NULL;
1343 	vchar_t *pbuf = NULL;
1344 	struct isakmp_parse_t *pa;
1345 	int error = -1;
1346 	int type;
1347 #ifdef HAVE_GSSAPI
1348 	vchar_t *gsstoken = NULL;
1349 #endif
1350 
1351 	/* validity check */
1352 	if (iph1->status != PHASE1ST_MSG2SENT) {
1353 		plog(LLV_ERROR, LOCATION, NULL,
1354 			"status mismatched %d.\n", iph1->status);
1355 		goto end;
1356 	}
1357 
1358 	/* decrypting */
1359 	if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) {
1360 		plog(LLV_ERROR, LOCATION, iph1->remote,
1361 			"reject the packet, "
1362 			"expecting the packet encrypted.\n");
1363 		goto end;
1364 	}
1365 	msg = oakley_do_decrypt(iph1, msg0, iph1->ivm->iv, iph1->ivm->ive);
1366 	if (msg == NULL)
1367 		goto end;
1368 
1369 	/* validate the type of next payload */
1370 	pbuf = isakmp_parse(msg);
1371 	if (pbuf == NULL)
1372 		goto end;
1373 
1374 	iph1->pl_hash = NULL;
1375 
1376 	for (pa = (struct isakmp_parse_t *)pbuf->v;
1377 	     pa->type != ISAKMP_NPTYPE_NONE;
1378 	     pa++) {
1379 
1380 		switch (pa->type) {
1381 		case ISAKMP_NPTYPE_ID:
1382 			if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
1383 				goto end;
1384 			break;
1385 		case ISAKMP_NPTYPE_HASH:
1386 			iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
1387 			break;
1388 		case ISAKMP_NPTYPE_CR:
1389 			if (oakley_savecr(iph1, pa->ptr) < 0)
1390 				goto end;
1391 			break;
1392 		case ISAKMP_NPTYPE_CERT:
1393 			if (oakley_savecert(iph1, pa->ptr) < 0)
1394 				goto end;
1395 			break;
1396 		case ISAKMP_NPTYPE_SIG:
1397 			if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
1398 				goto end;
1399 			break;
1400 #ifdef HAVE_GSSAPI
1401 		case ISAKMP_NPTYPE_GSS:
1402 			if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
1403 				goto end;
1404 			gssapi_save_received_token(iph1, gsstoken);
1405 			break;
1406 #endif
1407 		case ISAKMP_NPTYPE_VID:
1408 			handle_vendorid(iph1, pa->ptr);
1409 			break;
1410 		case ISAKMP_NPTYPE_N:
1411 			isakmp_check_notify(pa->ptr, iph1);
1412 			break;
1413 		default:
1414 			/* don't send information, see ident_r1recv() */
1415 			plog(LLV_ERROR, LOCATION, iph1->remote,
1416 				"ignore the packet, "
1417 				"received unexpecting payload type %d.\n",
1418 				pa->type);
1419 			goto end;
1420 		}
1421 	}
1422 
1423 	/* payload existency check */
1424 	/* XXX same as ident_i4recv(), should be merged. */
1425     {
1426 	int ng = 0;
1427 
1428 	switch (AUTHMETHOD(iph1)) {
1429 	case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
1430 #ifdef ENABLE_HYBRID
1431 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
1432 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
1433 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
1434 #endif
1435 		if (iph1->id_p == NULL || iph1->pl_hash == NULL)
1436 			ng++;
1437 		break;
1438 	case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
1439 	case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
1440 #ifdef ENABLE_HYBRID
1441 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
1442 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
1443 #endif
1444 		if (iph1->id_p == NULL || iph1->sig_p == NULL)
1445 			ng++;
1446 		break;
1447 	case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
1448 	case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
1449 #ifdef ENABLE_HYBRID
1450 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
1451 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
1452 #endif
1453 		if (iph1->pl_hash == NULL)
1454 			ng++;
1455 		break;
1456 #ifdef HAVE_GSSAPI
1457 	case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
1458 		if (gsstoken == NULL && iph1->pl_hash == NULL)
1459 			ng++;
1460 		break;
1461 #endif
1462 	default:
1463 		plog(LLV_ERROR, LOCATION, iph1->remote,
1464 			"invalid authmethod %d why ?\n",
1465 			iph1->approval->authmethod);
1466 		goto end;
1467 	}
1468 	if (ng) {
1469 		plog(LLV_ERROR, LOCATION, iph1->remote,
1470 			"few isakmp message received.\n");
1471 		goto end;
1472 	}
1473     }
1474 
1475 	/* verify identifier */
1476 	if (ipsecdoi_checkid1(iph1) != 0) {
1477 		plog(LLV_ERROR, LOCATION, iph1->remote,
1478 			"invalid ID payload.\n");
1479 		goto end;
1480 	}
1481 
1482 	/* validate authentication value */
1483 #ifdef HAVE_GSSAPI
1484 	if (gsstoken == NULL) {
1485 #endif
1486 		type = oakley_validate_auth(iph1);
1487 		if (type != 0) {
1488 			if (type == -1) {
1489 				/* msg printed inner oakley_validate_auth() */
1490 				goto end;
1491 			}
1492 			EVT_PUSH(iph1->local, iph1->remote,
1493 			    EVTT_PEERPH1AUTH_FAILED, NULL);
1494 			isakmp_info_send_n1(iph1, type, NULL);
1495 			goto end;
1496 		}
1497 #ifdef HAVE_GSSAPI
1498 	}
1499 #endif
1500 
1501 	if (oakley_checkcr(iph1) < 0) {
1502 		/* Ignore this error in order to be interoperability. */
1503 		;
1504 	}
1505 
1506 	/*
1507 	 * XXX: Should we do compare two addresses, ph1handle's and ID
1508 	 * payload's.
1509 	 */
1510 
1511 	plog(LLV_DEBUG, LOCATION, iph1->remote, "peer's ID\n");
1512 	plogdump(LLV_DEBUG, iph1->id_p->v, iph1->id_p->l);
1513 
1514 	/* see handler.h about IV synchronization. */
1515 	memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->ive->l);
1516 
1517 #ifdef HAVE_GSSAPI
1518 	iph1->status = gsstoken != NULL ? PHASE1ST_MSG2RECEIVED :
1519 	    PHASE1ST_MSG3RECEIVED;
1520 #else
1521 	iph1->status = PHASE1ST_MSG3RECEIVED;
1522 #endif
1523 
1524 	error = 0;
1525 
1526 end:
1527 	if (pbuf)
1528 		vfree(pbuf);
1529 	if (msg)
1530 		vfree(msg);
1531 #ifdef HAVE_GSSAPI
1532 	if (gsstoken)
1533 		vfree(gsstoken);
1534 #endif
1535 
1536 	if (error) {
1537 		VPTRINIT(iph1->id_p);
1538 		oakley_delcert(iph1->cert_p);
1539 		iph1->cert_p = NULL;
1540 		oakley_delcert(iph1->crl_p);
1541 		iph1->crl_p = NULL;
1542 		VPTRINIT(iph1->sig_p);
1543 		oakley_delcert(iph1->cr_p);
1544 		iph1->cr_p = NULL;
1545 	}
1546 
1547 	return error;
1548 }
1549 
1550 /*
1551  * send to initiator
1552  * 	psk: HDR*, IDr1, HASH_R
1553  * 	sig: HDR*, IDr1, [ CERT, ] SIG_R
1554  *   gssapi: HDR*, IDr1, < GSSr(n) | HASH_R >
1555  * 	rsa: HDR*, HASH_R
1556  * 	rev: HDR*, HASH_R
1557  */
1558 int
ident_r3send(iph1,msg)1559 ident_r3send(iph1, msg)
1560 	struct ph1handle *iph1;
1561 	vchar_t *msg;
1562 {
1563 	int error = -1;
1564 	int dohash = 1;
1565 #ifdef HAVE_GSSAPI
1566 	int len;
1567 #endif
1568 
1569 	/* validity check */
1570 	if (iph1->status != PHASE1ST_MSG3RECEIVED) {
1571 		plog(LLV_ERROR, LOCATION, NULL,
1572 			"status mismatched %d.\n", iph1->status);
1573 		goto end;
1574 	}
1575 
1576 	/* make ID payload into isakmp status */
1577 	if (ipsecdoi_setid1(iph1) < 0)
1578 		goto end;
1579 
1580 #ifdef HAVE_GSSAPI
1581 	if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB &&
1582 	    gssapi_more_tokens(iph1)) {
1583 		gssapi_get_rtoken(iph1, &len);
1584 		if (len != 0)
1585 			dohash = 0;
1586 	}
1587 #endif
1588 
1589 	if (dohash) {
1590 		/* generate HASH to send */
1591 		plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_R\n");
1592 		iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
1593 		if (iph1->hash == NULL)
1594 			goto end;
1595 	} else
1596 		iph1->hash = NULL;
1597 
1598 	/* set encryption flag */
1599 	iph1->flags |= ISAKMP_FLAG_E;
1600 
1601 	/* create HDR;ID;HASH payload */
1602 	iph1->sendbuf = ident_ir3mx(iph1);
1603 	if (iph1->sendbuf == NULL)
1604 		goto end;
1605 
1606 	/* send HDR;ID;HASH to responder */
1607 	if (isakmp_send(iph1, iph1->sendbuf) < 0)
1608 		goto end;
1609 
1610 	/* the sending message is added to the received-list. */
1611 	if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1612 		plog(LLV_ERROR , LOCATION, NULL,
1613 			"failed to add a response packet to the tree.\n");
1614 		goto end;
1615 	}
1616 
1617 	/* see handler.h about IV synchronization. */
1618 	memcpy(iph1->ivm->ive->v, iph1->ivm->iv->v, iph1->ivm->iv->l);
1619 
1620 	iph1->status = PHASE1ST_ESTABLISHED;
1621 
1622 	error = 0;
1623 
1624 end:
1625 
1626 	return error;
1627 }
1628 
1629 /*
1630  * This is used in main mode for:
1631  * initiator's 3rd exchange send to responder
1632  * 	psk: HDR, KE, Ni
1633  * 	sig: HDR, KE, Ni
1634  * 	rsa: HDR, KE, [ HASH(1), ] <IDi1_b>PubKey_r, <Ni_b>PubKey_r
1635  * 	rev: HDR, [ HASH(1), ] <Ni_b>Pubkey_r, <KE_b>Ke_i,
1636  * 	          <IDi1_b>Ke_i, [<<Cert-I_b>Ke_i]
1637  * responders 2nd exchnage send to initiator
1638  * 	psk: HDR, KE, Nr
1639  * 	sig: HDR, KE, Nr [, CR ]
1640  * 	rsa: HDR, KE, <IDr1_b>PubKey_i, <Nr_b>PubKey_i
1641  * 	rev: HDR, <Nr_b>PubKey_i, <KE_b>Ke_r, <IDr1_b>Ke_r,
1642  */
1643 static vchar_t *
ident_ir2mx(iph1)1644 ident_ir2mx(iph1)
1645 	struct ph1handle *iph1;
1646 {
1647 	vchar_t *buf = 0;
1648 	struct payload_list *plist = NULL;
1649 	int need_cr = 0;
1650 	vchar_t *cr = NULL;
1651 	vchar_t *vid = NULL;
1652 	int error = -1;
1653 #ifdef HAVE_GSSAPI
1654 	vchar_t *gsstoken = NULL;
1655 #endif
1656 #ifdef ENABLE_NATT
1657 	vchar_t *natd[2] = { NULL, NULL };
1658 #endif
1659 
1660 	/* create CR if need */
1661 	if (iph1->side == RESPONDER
1662 	 && iph1->rmconf->send_cr
1663 	 && oakley_needcr(iph1->approval->authmethod)
1664 	 && iph1->rmconf->peerscertfile == NULL) {
1665 		need_cr = 1;
1666 		cr = oakley_getcr(iph1);
1667 		if (cr == NULL) {
1668 			plog(LLV_ERROR, LOCATION, NULL,
1669 				"failed to get cr buffer.\n");
1670 			goto end;
1671 		}
1672 	}
1673 
1674 #ifdef HAVE_GSSAPI
1675 	if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
1676 		gssapi_get_token_to_send(iph1, &gsstoken);
1677 #endif
1678 
1679 	/* create isakmp KE payload */
1680 	plist = isakmp_plist_append(plist, iph1->dhpub, ISAKMP_NPTYPE_KE);
1681 
1682 	/* create isakmp NONCE payload */
1683 	plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE);
1684 
1685 #ifdef HAVE_GSSAPI
1686 	if (AUTHMETHOD(iph1) == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
1687 		plist = isakmp_plist_append(plist, gsstoken, ISAKMP_NPTYPE_GSS);
1688 #endif
1689 
1690 	/* append vendor id, if needed */
1691 	if (vid)
1692 		plist = isakmp_plist_append(plist, vid, ISAKMP_NPTYPE_VID);
1693 
1694 	/* create isakmp CR payload if needed */
1695 	if (need_cr)
1696 		plist = isakmp_plist_append(plist, cr, ISAKMP_NPTYPE_CR);
1697 
1698 #ifdef ENABLE_NATT
1699 	/* generate and append NAT-D payloads */
1700 	if (NATT_AVAILABLE(iph1) && iph1->status == PHASE1ST_MSG2RECEIVED)
1701 	{
1702 		if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) {
1703 			plog(LLV_ERROR, LOCATION, NULL,
1704 				"NAT-D hashing failed for %s\n", saddr2str(iph1->remote));
1705 			goto end;
1706 		}
1707 
1708 		if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) {
1709 			plog(LLV_ERROR, LOCATION, NULL,
1710 				"NAT-D hashing failed for %s\n", saddr2str(iph1->local));
1711 			goto end;
1712 		}
1713 
1714 		plog (LLV_INFO, LOCATION, NULL, "Adding remote and local NAT-D payloads.\n");
1715 		plist = isakmp_plist_append(plist, natd[0], iph1->natt_options->payload_nat_d);
1716 		plist = isakmp_plist_append(plist, natd[1], iph1->natt_options->payload_nat_d);
1717 	}
1718 #endif
1719 
1720 	buf = isakmp_plist_set_all (&plist, iph1);
1721 
1722 	error = 0;
1723 
1724 end:
1725 	if (error && buf != NULL) {
1726 		vfree(buf);
1727 		buf = NULL;
1728 	}
1729 	if (cr)
1730 		vfree(cr);
1731 #ifdef HAVE_GSSAPI
1732 	if (gsstoken)
1733 		vfree(gsstoken);
1734 #endif
1735 	if (vid)
1736 		vfree(vid);
1737 
1738 #ifdef ENABLE_NATT
1739 	if (natd[0])
1740 		vfree(natd[0]);
1741 	if (natd[1])
1742 		vfree(natd[1]);
1743 #endif
1744 
1745 	return buf;
1746 }
1747 
1748 /*
1749  * This is used in main mode for:
1750  * initiator's 4th exchange send to responder
1751  * 	psk: HDR*, IDi1, HASH_I
1752  * 	sig: HDR*, IDi1, [ CR, ] [ CERT, ] SIG_I
1753  *   gssapi: HDR*, [ IDi1, ] < GSSi(n) | HASH_I >
1754  * 	rsa: HDR*, HASH_I
1755  * 	rev: HDR*, HASH_I
1756  * responders 3rd exchnage send to initiator
1757  * 	psk: HDR*, IDr1, HASH_R
1758  * 	sig: HDR*, IDr1, [ CERT, ] SIG_R
1759  *   gssapi: HDR*, [ IDr1, ] < GSSr(n) | HASH_R >
1760  * 	rsa: HDR*, HASH_R
1761  * 	rev: HDR*, HASH_R
1762  */
1763 static vchar_t *
ident_ir3mx(iph1)1764 ident_ir3mx(iph1)
1765 	struct ph1handle *iph1;
1766 {
1767 	struct payload_list *plist = NULL;
1768 	vchar_t *buf = NULL, *new = NULL;
1769 	int need_cr = 0;
1770 	int need_cert = 0;
1771 	vchar_t *cr = NULL;
1772 	int error = -1;
1773 #ifdef HAVE_GSSAPI
1774 	int nptype;
1775 	vchar_t *gsstoken = NULL;
1776 	vchar_t *gsshash = NULL;
1777 #endif
1778 
1779 	switch (AUTHMETHOD(iph1)) {
1780 	case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
1781 #ifdef ENABLE_HYBRID
1782 	case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
1783 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
1784 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
1785 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
1786 #endif
1787 		/* create isakmp ID payload */
1788 		plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
1789 
1790 		/* create isakmp HASH payload */
1791 		plist = isakmp_plist_append(plist, iph1->hash, ISAKMP_NPTYPE_HASH);
1792 		break;
1793 	case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
1794 	case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
1795 #ifdef ENABLE_HYBRID
1796 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
1797 	case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
1798 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
1799 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
1800 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
1801 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
1802 #endif
1803 		if (oakley_getmycert(iph1) < 0)
1804 			goto end;
1805 
1806 		if (oakley_getsign(iph1) < 0)
1807 			goto end;
1808 
1809 		/* create CR if need */
1810 		if (iph1->side == INITIATOR
1811 		 && iph1->rmconf->send_cr
1812 	 	 && oakley_needcr(iph1->approval->authmethod)
1813 		 && iph1->rmconf->peerscertfile == NULL) {
1814 			need_cr = 1;
1815 			cr = oakley_getcr(iph1);
1816 			if (cr == NULL) {
1817 				plog(LLV_ERROR, LOCATION, NULL,
1818 					"failed to get cr buffer.\n");
1819 				goto end;
1820 			}
1821 		}
1822 
1823 		if (iph1->cert != NULL && iph1->rmconf->send_cert)
1824 			need_cert = 1;
1825 
1826 		/* add ID payload */
1827 		plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
1828 
1829 		/* add CERT payload if there */
1830 		if (need_cert)
1831 			plist = isakmp_plist_append(plist, iph1->cert->pl, ISAKMP_NPTYPE_CERT);
1832 		/* add SIG payload */
1833 		plist = isakmp_plist_append(plist, iph1->sig, ISAKMP_NPTYPE_SIG);
1834 
1835 		/* create isakmp CR payload */
1836 		if (need_cr)
1837 			plist = isakmp_plist_append(plist, cr, ISAKMP_NPTYPE_CR);
1838 		break;
1839 #ifdef HAVE_GSSAPI
1840 	case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
1841 		if (iph1->hash != NULL) {
1842 			gsshash = gssapi_wraphash(iph1);
1843 			if (gsshash == NULL)
1844 				goto end;
1845 		} else {
1846 			gssapi_get_token_to_send(iph1, &gsstoken);
1847 		}
1848 
1849 		if (!gssapi_id_sent(iph1)) {
1850 			/* create isakmp ID payload */
1851 			plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
1852 			gssapi_set_id_sent(iph1);
1853 		}
1854 
1855 		if (iph1->hash != NULL)
1856 			/* create isakmp HASH payload */
1857 			plist = isakmp_plist_append(plist, gsshash, ISAKMP_NPTYPE_HASH);
1858 		else
1859 			plist = isakmp_plist_append(plist, gsstoken, ISAKMP_NPTYPE_GSS);
1860 		break;
1861 #endif
1862 	case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
1863 	case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
1864 #ifdef ENABLE_HYBRID
1865 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
1866 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
1867 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
1868 	case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
1869 #endif
1870 		plog(LLV_ERROR, LOCATION, NULL,
1871 			"not supported authentication type %d\n",
1872 			iph1->approval->authmethod);
1873 		goto end;
1874 	default:
1875 		plog(LLV_ERROR, LOCATION, NULL,
1876 			"invalid authentication type %d\n",
1877 			iph1->approval->authmethod);
1878 		goto end;
1879 	}
1880 
1881 	buf = isakmp_plist_set_all (&plist, iph1);
1882 
1883 #ifdef HAVE_PRINT_ISAKMP_C
1884 	isakmp_printpacket(buf, iph1->local, iph1->remote, 1);
1885 #endif
1886 
1887 	/* encoding */
1888 	new = oakley_do_encrypt(iph1, buf, iph1->ivm->ive, iph1->ivm->iv);
1889 	if (new == NULL)
1890 		goto end;
1891 
1892 	vfree(buf);
1893 
1894 	buf = new;
1895 
1896 	error = 0;
1897 
1898 end:
1899 #ifdef HAVE_GSSAPI
1900 	if (gsstoken)
1901 		vfree(gsstoken);
1902 #endif
1903 	if (cr)
1904 		vfree(cr);
1905 	if (error && buf != NULL) {
1906 		vfree(buf);
1907 		buf = NULL;
1908 	}
1909 
1910 	return buf;
1911 }
1912