projects / strongswan.git / blob
? search:


2678a1b4a303543f87bdd1d34af646150e601f20
[strongswan.git] / src / libcharon / sa / ikev1 / tasks / main_mode.c
1 /*
2 * Copyright (C) 2011-2012 Tobias Brunner
3 * HSR Hochschule fuer Technik Rapperswil
4 *
5 * Copyright (C) 2011 Martin Willi
6 * Copyright (C) 2011 revosec AG
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * for more details.
17 */
18
19 #include "main_mode.h"
20
21 #include <string.h>
22
23 #include <daemon.h>
24 #include <sa/ikev1/phase1.h>
25 #include <encoding/payloads/sa_payload.h>
26 #include <encoding/payloads/id_payload.h>
27 #include <encoding/payloads/hash_payload.h>
28 #include <sa/ikev1/tasks/xauth.h>
29 #include <sa/ikev1/tasks/mode_config.h>
30 #include <sa/ikev1/tasks/informational.h>
31 #include <sa/ikev1/tasks/isakmp_delete.h>
32 #include <processing/jobs/adopt_children_job.h>
33 #include <processing/jobs/delete_ike_sa_job.h>
34
35 typedef struct private_main_mode_t private_main_mode_t;
36
37 /**
38 * Private members of a main_mode_t task.
39 */
40 struct private_main_mode_t {
41
42 /**
43 * Public methods and task_t interface.
44 */
45 main_mode_t public;
46
47 /**
48 * Assigned IKE_SA.
49 */
50 ike_sa_t *ike_sa;
51
52 /**
53 * Are we the initiator?
54 */
55 bool initiator;
56
57 /**
58 * Common phase 1 helper class
59 */
60 phase1_t *ph1;
61
62 /**
63 * IKE config to establish
64 */
65 ike_cfg_t *ike_cfg;
66
67 /**
68 * Peer config to use
69 */
70 peer_cfg_t *peer_cfg;
71
72 /**
73 * selected IKE proposal
74 */
75 proposal_t *proposal;
76
77 /**
78 * Negotiated SA lifetime
79 */
80 uint32_t lifetime;
81
82 /**
83 * Negotiated authentication method
84 */
85 auth_method_t method;
86
87 /** states of main mode */
88 enum {
89 MM_INIT,
90 MM_SA,
91 MM_KE,
92 MM_AUTH,
93 } state;
94 };
95
96 /**
97 * Set IKE_SA to established state
98 */
99 static bool establish(private_main_mode_t *this)
100 {
101 if (!charon->bus->authorize(charon->bus, TRUE))
102 {
103 DBG1(DBG_IKE, "final authorization hook forbids IKE_SA, cancelling");
104 return FALSE;
105 }
106
107 DBG0(DBG_IKE, "IKE_SA %s[%d] established between %H[%Y]...%H[%Y]",
108 this->ike_sa->get_name(this->ike_sa),
109 this->ike_sa->get_unique_id(this->ike_sa),
110 this->ike_sa->get_my_host(this->ike_sa),
111 this->ike_sa->get_my_id(this->ike_sa),
112 this->ike_sa->get_other_host(this->ike_sa),
113 this->ike_sa->get_other_id(this->ike_sa));
114
115 this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
116 charon->bus->ike_updown(charon->bus, this->ike_sa, TRUE);
117
118 return TRUE;
119 }
120
121 /**
122 * Check for notify errors, return TRUE if error found
123 */
124 static bool has_notify_errors(private_main_mode_t *this, message_t *message)
125 {
126 enumerator_t *enumerator;
127 payload_t *payload;
128 bool err = FALSE;
129
130 enumerator = message->create_payload_enumerator(message);
131 while (enumerator->enumerate(enumerator, &payload))
132 {
133 if (payload->get_type(payload) == PLV1_NOTIFY)
134 {
135 notify_payload_t *notify;
136 notify_type_t type;
137
138 notify = (notify_payload_t*)payload;
139 type = notify->get_notify_type(notify);
140 if (type < 16384)
141 {
142 DBG1(DBG_IKE, "received %N error notify",
143 notify_type_names, type);
144 err = TRUE;
145 }
146 else if (type == INITIAL_CONTACT_IKEV1)
147 {
148 if (!this->initiator && this->state == MM_AUTH)
149 {
150 /* If authenticated and received INITIAL_CONTACT,
151 * delete any existing IKE_SAs with that peer.
152 * The delete takes place when the SA is checked in due
153 * to other id not known until the 3rd message.*/
154 this->ike_sa->set_condition(this->ike_sa,
155 COND_INIT_CONTACT_SEEN, TRUE);
156 }
157 }
158 else
159 {
160 DBG1(DBG_IKE, "received %N notify", notify_type_names, type);
161 }
162 }
163 }
164 enumerator->destroy(enumerator);
165
166 return err;
167 }
168
169 /**
170 * Queue a task sending a notify in an INFORMATIONAL exchange
171 */
172 static status_t send_notify(private_main_mode_t *this, notify_type_t type)
173 {
174 notify_payload_t *notify;
175 ike_sa_id_t *ike_sa_id;
176 uint64_t spi_i, spi_r;
177 chunk_t spi;
178
179 notify = notify_payload_create_from_protocol_and_type(PLV1_NOTIFY,
180 PROTO_IKE, type);
181 ike_sa_id = this->ike_sa->get_id(this->ike_sa);
182 spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
183 spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
184 spi = chunk_cata("cc", chunk_from_thing(spi_i), chunk_from_thing(spi_r));
185 notify->set_spi_data(notify, spi);
186
187 this->ike_sa->queue_task(this->ike_sa,
188 (task_t*)informational_create(this->ike_sa, notify));
189 /* cancel all active/passive tasks in favour of informational */
190 this->ike_sa->flush_queue(this->ike_sa,
191 this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
192 return ALREADY_DONE;
193 }
194
195 /**
196 * Queue a delete task if authentication failed as initiator
197 */
198 static status_t send_delete(private_main_mode_t *this)
199 {
200 this->ike_sa->queue_task(this->ike_sa,
201 (task_t*)isakmp_delete_create(this->ike_sa, TRUE));
202 /* cancel all active tasks in favour of informational */
203 this->ike_sa->flush_queue(this->ike_sa,
204 this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
205 return ALREADY_DONE;
206 }
207
208 /**
209 * Add an INITIAL_CONTACT notify if first contact with peer
210 */
211 static void add_initial_contact(private_main_mode_t *this, message_t *message,
212 identification_t *idi)
213 {
214 identification_t *idr;
215 host_t *host;
216 notify_payload_t *notify;
217 ike_sa_id_t *ike_sa_id;
218 uint64_t spi_i, spi_r;
219 chunk_t spi;
220
221 idr = this->ph1->get_id(this->ph1, this->peer_cfg, FALSE);
222 if (idr && !idr->contains_wildcards(idr))
223 {
224 if (this->peer_cfg->get_unique_policy(this->peer_cfg) != UNIQUE_NEVER)
225 {
226 host = this->ike_sa->get_other_host(this->ike_sa);
227 if (!charon->ike_sa_manager->has_contact(charon->ike_sa_manager,
228 idi, idr, host->get_family(host)))
229 {
230 notify = notify_payload_create_from_protocol_and_type(
231 PLV1_NOTIFY, PROTO_IKE, INITIAL_CONTACT_IKEV1);
232 ike_sa_id = this->ike_sa->get_id(this->ike_sa);
233 spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
234 spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
235 spi = chunk_cata("cc", chunk_from_thing(spi_i),
236 chunk_from_thing(spi_r));
237 notify->set_spi_data(notify, spi);
238 message->add_payload(message, (payload_t*)notify);
239 }
240 }
241 }
242 }
243
244 METHOD(task_t, build_i, status_t,
245 private_main_mode_t *this, message_t *message)
246 {
247 switch (this->state)
248 {
249 case MM_INIT:
250 {
251 sa_payload_t *sa_payload;
252 linked_list_t *proposals;
253 packet_t *packet;
254
255 DBG0(DBG_IKE, "initiating Main Mode IKE_SA %s[%d] to %H",
256 this->ike_sa->get_name(this->ike_sa),
257 this->ike_sa->get_unique_id(this->ike_sa),
258 this->ike_sa->get_other_host(this->ike_sa));
259 this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
260
261 this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
262 this->peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
263 this->peer_cfg->get_ref(this->peer_cfg);
264
265 this->method = this->ph1->get_auth_method(this->ph1, this->peer_cfg);
266 if (this->method == AUTH_NONE)
267 {
268 DBG1(DBG_CFG, "configuration uses unsupported authentication");
269 return FAILED;
270 }
271 this->lifetime = this->peer_cfg->get_reauth_time(this->peer_cfg,
272 FALSE);
273 if (!this->lifetime)
274 { /* fall back to rekey time of no rekey time configured */
275 this->lifetime = this->peer_cfg->get_rekey_time(this->peer_cfg,
276 FALSE);
277 }
278 this->lifetime += this->peer_cfg->get_over_time(this->peer_cfg);
279 proposals = this->ike_cfg->get_proposals(this->ike_cfg);
280 sa_payload = sa_payload_create_from_proposals_v1(proposals,
281 this->lifetime, 0, this->method, MODE_NONE,
282 ENCAP_NONE, 0);
283 proposals->destroy_offset(proposals, offsetof(proposal_t, destroy));
284
285 message->add_payload(message, &sa_payload->payload_interface);
286
287 /* pregenerate message to store SA payload */
288 if (this->ike_sa->generate_message(this->ike_sa, message,
289 &packet) != SUCCESS)
290 {
291 DBG1(DBG_IKE, "pregenerating SA payload failed");
292 return FAILED;
293 }
294 packet->destroy(packet);
295 if (!this->ph1->save_sa_payload(this->ph1, message))
296 {
297 return FAILED;
298 }
299
300 this->state = MM_SA;
301 return NEED_MORE;
302 }
303 case MM_SA:
304 {
305 uint16_t group;
306
307 if (!this->ph1->create_hasher(this->ph1))
308 {
309 return send_notify(this, NO_PROPOSAL_CHOSEN);
310 }
311 if (!this->proposal->get_algorithm(this->proposal,
312 DIFFIE_HELLMAN_GROUP, &group, NULL))
313 {
314 DBG1(DBG_IKE, "DH group selection failed");
315 return send_notify(this, NO_PROPOSAL_CHOSEN);
316 }
317 if (!this->ph1->create_dh(this->ph1, group))
318 {
319 DBG1(DBG_IKE, "negotiated DH group not supported");
320 return send_notify(this, INVALID_KEY_INFORMATION);
321 }
322 if (!this->ph1->add_nonce_ke(this->ph1, message))
323 {
324 return send_notify(this, INVALID_KEY_INFORMATION);
325 }
326 this->state = MM_KE;
327 return NEED_MORE;
328 }
329 case MM_KE:
330 {
331 id_payload_t *id_payload;
332 identification_t *id;
333
334 id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
335 this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
336 id_payload = id_payload_create_from_identification(PLV1_ID, id);
337 message->add_payload(message, &id_payload->payload_interface);
338
339 if (!this->ph1->build_auth(this->ph1, this->method, message,
340 id_payload->get_encoded(id_payload)))
341 {
342 charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
343 return send_notify(this, AUTHENTICATION_FAILED);
344 }
345
346 add_initial_contact(this, message, id);
347
348 this->state = MM_AUTH;
349 return NEED_MORE;
350 }
351 default:
352 return FAILED;
353 }
354 }
355
356 METHOD(task_t, process_r, status_t,
357 private_main_mode_t *this, message_t *message)
358 {
359 switch (this->state)
360 {
361 case MM_INIT:
362 {
363 linked_list_t *list;
364 sa_payload_t *sa_payload;
365 proposal_selection_flag_t flags = 0;
366
367 this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
368 DBG0(DBG_IKE, "%H is initiating a Main Mode IKE_SA",
369 message->get_source(message));
370 this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
371
372 this->ike_sa->update_hosts(this->ike_sa,
373 message->get_destination(message),
374 message->get_source(message), TRUE);
375
376 sa_payload = (sa_payload_t*)message->get_payload(message,
377 PLV1_SECURITY_ASSOCIATION);
378 if (!sa_payload)
379 {
380 DBG1(DBG_IKE, "SA payload missing");
381 return send_notify(this, INVALID_PAYLOAD_TYPE);
382 }
383 if (!this->ph1->save_sa_payload(this->ph1, message))
384 {
385 return send_notify(this, INVALID_PAYLOAD_TYPE);
386 }
387
388 list = sa_payload->get_proposals(sa_payload);
389 if (this->ike_sa->supports_extension(this->ike_sa , EXT_STRONGSWAN))
390 {
391 flags |= PROPOSAL_ALLOW_PRIVATE;
392 }
393 if (!lib->settings->get_bool(lib->settings,
394 "%s.prefer_configured_proposals", TRUE, lib->ns))
395 {
396 flags |= PROPOSAL_PREFER_SUPPLIED;
397 }
398 this->proposal = this->ike_cfg->select_proposal(this->ike_cfg,
399 list, flags);
400 list->destroy_offset(list, offsetof(proposal_t, destroy));
401 if (!this->proposal)
402 {
403 DBG1(DBG_IKE, "no proposal found");
404 return send_notify(this, NO_PROPOSAL_CHOSEN);
405 }
406 this->ike_sa->set_proposal(this->ike_sa, this->proposal);
407
408 this->method = sa_payload->get_auth_method(sa_payload);
409 this->lifetime = sa_payload->get_lifetime(sa_payload);
410
411 this->state = MM_SA;
412 return NEED_MORE;
413 }
414 case MM_SA:
415 {
416 uint16_t group;
417
418 if (!this->ph1->create_hasher(this->ph1))
419 {
420 return send_notify(this, INVALID_KEY_INFORMATION);
421 }
422 if (!this->proposal->get_algorithm(this->proposal,
423 DIFFIE_HELLMAN_GROUP, &group, NULL))
424 {
425 DBG1(DBG_IKE, "DH group selection failed");
426 return send_notify(this, INVALID_KEY_INFORMATION);
427 }
428 if (!this->ph1->create_dh(this->ph1, group))
429 {
430 DBG1(DBG_IKE, "negotiated DH group not supported");
431 return send_notify(this, INVALID_KEY_INFORMATION);
432 }
433 if (!this->ph1->get_nonce_ke(this->ph1, message))
434 {
435 return send_notify(this, INVALID_PAYLOAD_TYPE);
436 }
437 this->state = MM_KE;
438 return NEED_MORE;
439 }
440 case MM_KE:
441 {
442 id_payload_t *id_payload;
443 identification_t *id;
444
445 id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
446 if (!id_payload)
447 {
448 DBG1(DBG_IKE, "IDii payload missing");
449 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
450 return send_notify(this, INVALID_PAYLOAD_TYPE);
451 }
452 id = id_payload->get_identification(id_payload);
453 this->ike_sa->set_other_id(this->ike_sa, id);
454
455 while (TRUE)
456 {
457 DESTROY_IF(this->peer_cfg);
458 this->peer_cfg = this->ph1->select_config(this->ph1,
459 this->method, FALSE, id);
460 if (!this->peer_cfg)
461 {
462 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
463 return send_notify(this, AUTHENTICATION_FAILED);
464 }
465 this->ike_sa->set_peer_cfg(this->ike_sa, this->peer_cfg);
466
467 if (this->ph1->verify_auth(this->ph1, this->method, message,
468 id_payload->get_encoded(id_payload)))
469 {
470 break;
471 }
472 }
473
474 if (!charon->bus->authorize(charon->bus, FALSE))
475 {
476 DBG1(DBG_IKE, "Main Mode authorization hook forbids IKE_SA, "
477 "cancelling");
478 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
479 return send_notify(this, AUTHENTICATION_FAILED);
480 }
481
482 this->state = MM_AUTH;
483 if (has_notify_errors(this, message))
484 {
485 return FAILED;
486 }
487 return NEED_MORE;
488 }
489 default:
490 return FAILED;
491 }
492 }
493
494 METHOD(task_t, build_r, status_t,
495 private_main_mode_t *this, message_t *message)
496 {
497 switch (this->state)
498 {
499 case MM_SA:
500 {
501 sa_payload_t *sa_payload;
502
503 sa_payload = sa_payload_create_from_proposal_v1(this->proposal,
504 this->lifetime, 0, this->method, MODE_NONE,
505 ENCAP_NONE, 0);
506 message->add_payload(message, &sa_payload->payload_interface);
507
508 return NEED_MORE;
509 }
510 case MM_KE:
511 {
512 if (!this->ph1->add_nonce_ke(this->ph1, message))
513 {
514 return send_notify(this, INVALID_KEY_INFORMATION);
515 }
516 if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
517 {
518 return send_notify(this, INVALID_KEY_INFORMATION);
519 }
520 return NEED_MORE;
521 }
522 case MM_AUTH:
523 {
524 id_payload_t *id_payload;
525 identification_t *id;
526 adopt_children_job_t *job = NULL;
527 xauth_t *xauth = NULL;
528
529 id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
530 this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
531
532 id_payload = id_payload_create_from_identification(PLV1_ID, id);
533 message->add_payload(message, &id_payload->payload_interface);
534
535 if (!this->ph1->build_auth(this->ph1, this->method, message,
536 id_payload->get_encoded(id_payload)))
537 {
538 charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
539 return send_notify(this, AUTHENTICATION_FAILED);
540 }
541
542 switch (this->method)
543 {
544 case AUTH_XAUTH_INIT_PSK:
545 case AUTH_XAUTH_INIT_RSA:
546 case AUTH_HYBRID_INIT_RSA:
547 xauth = xauth_create(this->ike_sa, TRUE);
548 this->ike_sa->queue_task(this->ike_sa, (task_t*)xauth);
549 break;
550 case AUTH_XAUTH_RESP_PSK:
551 case AUTH_XAUTH_RESP_RSA:
552 case AUTH_HYBRID_RESP_RSA:
553 /* wait for XAUTH request */
554 break;
555 default:
556 if (charon->ike_sa_manager->check_uniqueness(
557 charon->ike_sa_manager, this->ike_sa, FALSE))
558 {
559 DBG1(DBG_IKE, "cancelling Main Mode due to uniqueness "
560 "policy");
561 return send_notify(this, AUTHENTICATION_FAILED);
562 }
563 if (!establish(this))
564 {
565 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
566 return send_notify(this, AUTHENTICATION_FAILED);
567 }
568 job = adopt_children_job_create(
569 this->ike_sa->get_id(this->ike_sa));
570 break;
571 }
572 if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
573 {
574 if (this->peer_cfg->use_pull_mode(this->peer_cfg))
575 {
576 this->ike_sa->queue_task(this->ike_sa,
577 (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
578 }
579 }
580 else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
581 {
582 if (!this->peer_cfg->use_pull_mode(this->peer_cfg))
583 {
584 if (job)
585 {
586 job->queue_task(job, (task_t*)
587 mode_config_create(this->ike_sa, TRUE, FALSE));
588 }
589 else if (xauth)
590 {
591 xauth->queue_mode_config_push(xauth);
592 }
593 else
594 {
595 this->ike_sa->queue_task(this->ike_sa, (task_t*)
596 mode_config_create(this->ike_sa, TRUE, FALSE));
597 }
598 }
599 }
600 if (job)
601 {
602 lib->processor->queue_job(lib->processor, (job_t*)job);
603 }
604 return SUCCESS;
605 }
606 default:
607 return FAILED;
608 }
609 }
610
611 /**
612 * Schedule a timeout for the IKE_SA should it not establish
613 */
614 static void schedule_timeout(ike_sa_t *ike_sa)
615 {
616 job_t *job;
617
618 job = (job_t*)delete_ike_sa_job_create(ike_sa->get_id(ike_sa), FALSE);
619 lib->scheduler->schedule_job(lib->scheduler, job, HALF_OPEN_IKE_SA_TIMEOUT);
620 }
621
622 METHOD(task_t, process_i, status_t,
623 private_main_mode_t *this, message_t *message)
624 {
625 switch (this->state)
626 {
627 case MM_SA:
628 {
629 linked_list_t *list;
630 sa_payload_t *sa_payload;
631 auth_method_t method;
632 proposal_selection_flag_t flags = 0;
633 uint32_t lifetime;
634
635 sa_payload = (sa_payload_t*)message->get_payload(message,
636 PLV1_SECURITY_ASSOCIATION);
637 if (!sa_payload)
638 {
639 DBG1(DBG_IKE, "SA payload missing");
640 return send_notify(this, INVALID_PAYLOAD_TYPE);
641 }
642 list = sa_payload->get_proposals(sa_payload);
643 if (this->ike_sa->supports_extension(this->ike_sa , EXT_STRONGSWAN))
644 {
645 flags |= PROPOSAL_ALLOW_PRIVATE;
646 }
647 this->proposal = this->ike_cfg->select_proposal(this->ike_cfg,
648 list, flags);
649 list->destroy_offset(list, offsetof(proposal_t, destroy));
650 if (!this->proposal)
651 {
652 DBG1(DBG_IKE, "no proposal found");
653 return send_notify(this, NO_PROPOSAL_CHOSEN);
654 }
655 this->ike_sa->set_proposal(this->ike_sa, this->proposal);
656
657 lifetime = sa_payload->get_lifetime(sa_payload);
658 if (lifetime != this->lifetime)
659 {
660 DBG1(DBG_IKE, "received lifetime %us does not match configured "
661 "lifetime %us", lifetime, this->lifetime);
662 }
663 this->lifetime = lifetime;
664 method = sa_payload->get_auth_method(sa_payload);
665 if (method != this->method)
666 {
667 DBG1(DBG_IKE, "received %N authentication, but configured %N, "
668 "continue with configured", auth_method_names, method,
669 auth_method_names, this->method);
670 }
671 return NEED_MORE;
672 }
673 case MM_KE:
674 {
675 if (!this->ph1->get_nonce_ke(this->ph1, message))
676 {
677 return send_notify(this, INVALID_PAYLOAD_TYPE);
678 }
679 if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
680 {
681 return send_notify(this, INVALID_KEY_INFORMATION);
682 }
683 return NEED_MORE;
684 }
685 case MM_AUTH:
686 {
687 id_payload_t *id_payload;
688 identification_t *id, *cid;
689
690 id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
691 if (!id_payload)
692 {
693 DBG1(DBG_IKE, "IDir payload missing");
694 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
695 return send_delete(this);
696 }
697 id = id_payload->get_identification(id_payload);
698 cid = this->ph1->get_id(this->ph1, this->peer_cfg, FALSE);
699 if (cid && !id->matches(id, cid))
700 {
701 DBG1(DBG_IKE, "IDir '%Y' does not match to '%Y'", id, cid);
702 id->destroy(id);
703 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
704 return send_delete(this);
705 }
706 this->ike_sa->set_other_id(this->ike_sa, id);
707
708 if (!this->ph1->verify_auth(this->ph1, this->method, message,
709 id_payload->get_encoded(id_payload)))
710 {
711 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
712 return send_delete(this);
713 }
714 if (!charon->bus->authorize(charon->bus, FALSE))
715 {
716 DBG1(DBG_IKE, "Main Mode authorization hook forbids IKE_SA, "
717 "cancelling");
718 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
719 return send_delete(this);
720 }
721
722 switch (this->method)
723 {
724 case AUTH_XAUTH_INIT_PSK:
725 case AUTH_XAUTH_INIT_RSA:
726 case AUTH_HYBRID_INIT_RSA:
727 /* wait for XAUTH request */
728 schedule_timeout(this->ike_sa);
729 break;
730 case AUTH_XAUTH_RESP_PSK:
731 case AUTH_XAUTH_RESP_RSA:
732 case AUTH_HYBRID_RESP_RSA:
733 this->ike_sa->queue_task(this->ike_sa,
734 (task_t*)xauth_create(this->ike_sa, TRUE));
735 break;
736 default:
737 if (charon->ike_sa_manager->check_uniqueness(
738 charon->ike_sa_manager, this->ike_sa, FALSE))
739 {
740 DBG1(DBG_IKE, "cancelling Main Mode due to uniqueness "
741 "policy");
742 return send_delete(this);
743 }
744 if (!establish(this))
745 {
746 charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
747 return send_delete(this);
748 }
749 break;
750 }
751 /* check for and prepare mode config push/pull */
752 if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
753 {
754 if (this->peer_cfg->use_pull_mode(this->peer_cfg))
755 {
756 this->ike_sa->queue_task(this->ike_sa,
757 (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
758 }
759 else
760 {
761 schedule_timeout(this->ike_sa);
762 }
763 }
764 else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
765 {
766 if (this->peer_cfg->use_pull_mode(this->peer_cfg))
767 {
768 schedule_timeout(this->ike_sa);
769 }
770 else
771 {
772 this->ike_sa->queue_task(this->ike_sa,
773 (task_t*)mode_config_create(this->ike_sa, TRUE, FALSE));
774 }
775 }
776 return SUCCESS;
777 }
778 default:
779 return FAILED;
780 }
781 }
782
783 METHOD(task_t, get_type, task_type_t,
784 private_main_mode_t *this)
785 {
786 return TASK_MAIN_MODE;
787 }
788
789 METHOD(task_t, migrate, void,
790 private_main_mode_t *this, ike_sa_t *ike_sa)
791 {
792 DESTROY_IF(this->peer_cfg);
793 DESTROY_IF(this->proposal);
794 this->ph1->destroy(this->ph1);
795
796 this->ike_sa = ike_sa;
797 this->state = MM_INIT;
798 this->peer_cfg = NULL;
799 this->proposal = NULL;
800 this->ph1 = phase1_create(ike_sa, this->initiator);
801 }
802
803 METHOD(task_t, destroy, void,
804 private_main_mode_t *this)
805 {
806 DESTROY_IF(this->peer_cfg);
807 DESTROY_IF(this->proposal);
808 this->ph1->destroy(this->ph1);
809 free(this);
810 }
811
812 /*
813 * Described in header.
814 */
815 main_mode_t *main_mode_create(ike_sa_t *ike_sa, bool initiator)
816 {
817 private_main_mode_t *this;
818
819 INIT(this,
820 .public = {
821 .task = {
822 .get_type = _get_type,
823 .migrate = _migrate,
824 .destroy = _destroy,
825 },
826 },
827 .ike_sa = ike_sa,
828 .ph1 = phase1_create(ike_sa, initiator),
829 .initiator = initiator,
830 .state = MM_INIT,
831 );
832
833 if (initiator)
834 {
835 this->public.task.build = _build_i;
836 this->public.task.process = _process_i;
837 }
838 else
839 {
840 this->public.task.build = _build_r;
841 this->public.task.process = _process_r;
842 }
843
844 return &this->public;
845 }
strongSwan - IPsec VPN