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1.1 misho 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: {
1.1.1.2 ! misho 305: identification_t *id;
1.1 misho 306: uint16_t group;
307:
1.1.1.2 ! misho 308: /* we might need the identity to look up a PSK when processing the
! 309: * response */
! 310: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
! 311: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
! 312:
1.1 misho 313: if (!this->ph1->create_hasher(this->ph1))
314: {
315: return send_notify(this, NO_PROPOSAL_CHOSEN);
316: }
317: if (!this->proposal->get_algorithm(this->proposal,
318: DIFFIE_HELLMAN_GROUP, &group, NULL))
319: {
320: DBG1(DBG_IKE, "DH group selection failed");
321: return send_notify(this, NO_PROPOSAL_CHOSEN);
322: }
323: if (!this->ph1->create_dh(this->ph1, group))
324: {
325: DBG1(DBG_IKE, "negotiated DH group not supported");
326: return send_notify(this, INVALID_KEY_INFORMATION);
327: }
328: if (!this->ph1->add_nonce_ke(this->ph1, message))
329: {
330: return send_notify(this, INVALID_KEY_INFORMATION);
331: }
332: this->state = MM_KE;
333: return NEED_MORE;
334: }
335: case MM_KE:
336: {
337: id_payload_t *id_payload;
338: identification_t *id;
339:
1.1.1.2 ! misho 340: id = this->ike_sa->get_my_id(this->ike_sa);
1.1 misho 341: id_payload = id_payload_create_from_identification(PLV1_ID, id);
342: message->add_payload(message, &id_payload->payload_interface);
343:
344: if (!this->ph1->build_auth(this->ph1, this->method, message,
345: id_payload->get_encoded(id_payload)))
346: {
347: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
348: return send_notify(this, AUTHENTICATION_FAILED);
349: }
350:
351: add_initial_contact(this, message, id);
352:
353: this->state = MM_AUTH;
354: return NEED_MORE;
355: }
356: default:
357: return FAILED;
358: }
359: }
360:
361: METHOD(task_t, process_r, status_t,
362: private_main_mode_t *this, message_t *message)
363: {
364: switch (this->state)
365: {
366: case MM_INIT:
367: {
368: linked_list_t *list;
369: sa_payload_t *sa_payload;
370: proposal_selection_flag_t flags = 0;
371:
372: this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
373: DBG0(DBG_IKE, "%H is initiating a Main Mode IKE_SA",
374: message->get_source(message));
375: this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
376:
377: this->ike_sa->update_hosts(this->ike_sa,
378: message->get_destination(message),
1.1.1.2 ! misho 379: message->get_source(message),
! 380: UPDATE_HOSTS_FORCE_ADDRS);
1.1 misho 381:
382: sa_payload = (sa_payload_t*)message->get_payload(message,
383: PLV1_SECURITY_ASSOCIATION);
384: if (!sa_payload)
385: {
386: DBG1(DBG_IKE, "SA payload missing");
387: return send_notify(this, INVALID_PAYLOAD_TYPE);
388: }
389: if (!this->ph1->save_sa_payload(this->ph1, message))
390: {
391: return send_notify(this, INVALID_PAYLOAD_TYPE);
392: }
393:
394: list = sa_payload->get_proposals(sa_payload);
395: if (!this->ike_sa->supports_extension(this->ike_sa, EXT_STRONGSWAN)
396: && !lib->settings->get_bool(lib->settings,
397: "%s.accept_private_algs", FALSE, lib->ns))
398: {
399: flags |= PROPOSAL_SKIP_PRIVATE;
400: }
401: if (!lib->settings->get_bool(lib->settings,
402: "%s.prefer_configured_proposals", TRUE, lib->ns))
403: {
404: flags |= PROPOSAL_PREFER_SUPPLIED;
405: }
406: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg,
407: list, flags);
408: list->destroy_offset(list, offsetof(proposal_t, destroy));
409: if (!this->proposal)
410: {
411: DBG1(DBG_IKE, "no proposal found");
412: return send_notify(this, NO_PROPOSAL_CHOSEN);
413: }
414: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
415:
416: this->method = sa_payload->get_auth_method(sa_payload);
417: this->lifetime = sa_payload->get_lifetime(sa_payload,
418: this->proposal);
419:
420: this->state = MM_SA;
421: return NEED_MORE;
422: }
423: case MM_SA:
424: {
425: uint16_t group;
426:
427: if (!this->ph1->create_hasher(this->ph1))
428: {
429: return send_notify(this, INVALID_KEY_INFORMATION);
430: }
431: if (!this->proposal->get_algorithm(this->proposal,
432: DIFFIE_HELLMAN_GROUP, &group, NULL))
433: {
434: DBG1(DBG_IKE, "DH group selection failed");
435: return send_notify(this, INVALID_KEY_INFORMATION);
436: }
437: if (!this->ph1->create_dh(this->ph1, group))
438: {
439: DBG1(DBG_IKE, "negotiated DH group not supported");
440: return send_notify(this, INVALID_KEY_INFORMATION);
441: }
442: if (!this->ph1->get_nonce_ke(this->ph1, message))
443: {
444: return send_notify(this, INVALID_PAYLOAD_TYPE);
445: }
446: this->state = MM_KE;
447: return NEED_MORE;
448: }
449: case MM_KE:
450: {
451: id_payload_t *id_payload;
452: identification_t *id;
453:
454: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
455: if (!id_payload)
456: {
457: DBG1(DBG_IKE, "IDii payload missing");
458: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
459: return send_notify(this, INVALID_PAYLOAD_TYPE);
460: }
461: id = id_payload->get_identification(id_payload);
462: this->ike_sa->set_other_id(this->ike_sa, id);
463:
464: while (TRUE)
465: {
466: DESTROY_IF(this->peer_cfg);
467: this->peer_cfg = this->ph1->select_config(this->ph1,
468: this->method, FALSE, id);
469: if (!this->peer_cfg)
470: {
471: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
472: return send_notify(this, AUTHENTICATION_FAILED);
473: }
474: this->ike_sa->set_peer_cfg(this->ike_sa, this->peer_cfg);
475:
476: if (this->ph1->verify_auth(this->ph1, this->method, message,
477: id_payload->get_encoded(id_payload)))
478: {
479: break;
480: }
481: }
482:
483: if (!charon->bus->authorize(charon->bus, FALSE))
484: {
485: DBG1(DBG_IKE, "Main Mode authorization hook forbids IKE_SA, "
486: "cancelling");
487: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
488: return send_notify(this, AUTHENTICATION_FAILED);
489: }
490:
491: this->state = MM_AUTH;
492: if (has_notify_errors(this, message))
493: {
494: return FAILED;
495: }
496: return NEED_MORE;
497: }
498: default:
499: return FAILED;
500: }
501: }
502:
503: METHOD(task_t, build_r, status_t,
504: private_main_mode_t *this, message_t *message)
505: {
506: switch (this->state)
507: {
508: case MM_SA:
509: {
510: sa_payload_t *sa_payload;
511:
512: sa_payload = sa_payload_create_from_proposal_v1(this->proposal,
513: this->lifetime, 0, this->method, MODE_NONE,
514: ENCAP_NONE, 0);
515: message->add_payload(message, &sa_payload->payload_interface);
516:
517: return NEED_MORE;
518: }
519: case MM_KE:
520: {
521: if (!this->ph1->add_nonce_ke(this->ph1, message))
522: {
523: return send_notify(this, INVALID_KEY_INFORMATION);
524: }
525: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
526: {
527: return send_notify(this, INVALID_KEY_INFORMATION);
528: }
529: return NEED_MORE;
530: }
531: case MM_AUTH:
532: {
533: id_payload_t *id_payload;
534: identification_t *id;
535: adopt_children_job_t *job = NULL;
536: xauth_t *xauth = NULL;
537:
538: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
539: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
540:
541: id_payload = id_payload_create_from_identification(PLV1_ID, id);
542: message->add_payload(message, &id_payload->payload_interface);
543:
544: if (!this->ph1->build_auth(this->ph1, this->method, message,
545: id_payload->get_encoded(id_payload)))
546: {
547: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
548: return send_notify(this, AUTHENTICATION_FAILED);
549: }
550:
551: switch (this->method)
552: {
553: case AUTH_XAUTH_INIT_PSK:
554: case AUTH_XAUTH_INIT_RSA:
555: case AUTH_HYBRID_INIT_RSA:
556: xauth = xauth_create(this->ike_sa, TRUE);
557: this->ike_sa->queue_task(this->ike_sa, (task_t*)xauth);
558: break;
559: case AUTH_XAUTH_RESP_PSK:
560: case AUTH_XAUTH_RESP_RSA:
561: case AUTH_HYBRID_RESP_RSA:
562: /* wait for XAUTH request */
563: break;
564: default:
565: if (charon->ike_sa_manager->check_uniqueness(
566: charon->ike_sa_manager, this->ike_sa, FALSE))
567: {
568: DBG1(DBG_IKE, "cancelling Main Mode due to uniqueness "
569: "policy");
570: return send_notify(this, AUTHENTICATION_FAILED);
571: }
572: if (!establish(this))
573: {
574: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
575: return send_notify(this, AUTHENTICATION_FAILED);
576: }
577: job = adopt_children_job_create(
578: this->ike_sa->get_id(this->ike_sa));
579: break;
580: }
581: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
582: {
583: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
584: {
585: this->ike_sa->queue_task(this->ike_sa,
586: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
587: }
588: }
589: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
590: {
591: if (!this->peer_cfg->use_pull_mode(this->peer_cfg))
592: {
593: if (job)
594: {
595: job->queue_task(job, (task_t*)
596: mode_config_create(this->ike_sa, TRUE, FALSE));
597: }
598: else if (xauth)
599: {
600: xauth->queue_mode_config_push(xauth);
601: }
602: else
603: {
604: this->ike_sa->queue_task(this->ike_sa, (task_t*)
605: mode_config_create(this->ike_sa, TRUE, FALSE));
606: }
607: }
608: }
609: if (job)
610: {
611: lib->processor->queue_job(lib->processor, (job_t*)job);
612: }
613: return SUCCESS;
614: }
615: default:
616: return FAILED;
617: }
618: }
619:
620: /**
621: * Schedule a timeout for the IKE_SA should it not establish
622: */
623: static void schedule_timeout(ike_sa_t *ike_sa)
624: {
625: job_t *job;
626:
627: job = (job_t*)delete_ike_sa_job_create(ike_sa->get_id(ike_sa), FALSE);
628: lib->scheduler->schedule_job(lib->scheduler, job, HALF_OPEN_IKE_SA_TIMEOUT);
629: }
630:
631: METHOD(task_t, process_i, status_t,
632: private_main_mode_t *this, message_t *message)
633: {
634: switch (this->state)
635: {
636: case MM_SA:
637: {
638: linked_list_t *list;
639: sa_payload_t *sa_payload;
640: auth_method_t method;
641: proposal_selection_flag_t flags = 0;
642: uint32_t lifetime;
643:
644: sa_payload = (sa_payload_t*)message->get_payload(message,
645: PLV1_SECURITY_ASSOCIATION);
646: if (!sa_payload)
647: {
648: DBG1(DBG_IKE, "SA payload missing");
649: return send_notify(this, INVALID_PAYLOAD_TYPE);
650: }
651: list = sa_payload->get_proposals(sa_payload);
652: if (!this->ike_sa->supports_extension(this->ike_sa, EXT_STRONGSWAN)
653: && !lib->settings->get_bool(lib->settings,
654: "%s.accept_private_algs", FALSE, lib->ns))
655: {
656: flags |= PROPOSAL_SKIP_PRIVATE;
657: }
658: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg,
659: list, flags);
660: list->destroy_offset(list, offsetof(proposal_t, destroy));
661: if (!this->proposal)
662: {
663: DBG1(DBG_IKE, "no proposal found");
664: return send_notify(this, NO_PROPOSAL_CHOSEN);
665: }
666: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
667:
668: lifetime = sa_payload->get_lifetime(sa_payload, this->proposal);
669: if (lifetime != this->lifetime)
670: {
671: DBG1(DBG_IKE, "received lifetime %us does not match configured "
672: "lifetime %us", lifetime, this->lifetime);
673: }
674: this->lifetime = lifetime;
675: method = sa_payload->get_auth_method(sa_payload);
676: if (method != this->method)
677: {
678: DBG1(DBG_IKE, "received %N authentication, but configured %N, "
679: "continue with configured", auth_method_names, method,
680: auth_method_names, this->method);
681: }
682: return NEED_MORE;
683: }
684: case MM_KE:
685: {
686: if (!this->ph1->get_nonce_ke(this->ph1, message))
687: {
688: return send_notify(this, INVALID_PAYLOAD_TYPE);
689: }
690: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
691: {
692: return send_notify(this, INVALID_KEY_INFORMATION);
693: }
694: return NEED_MORE;
695: }
696: case MM_AUTH:
697: {
698: id_payload_t *id_payload;
699: identification_t *id, *cid;
700:
701: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
702: if (!id_payload)
703: {
704: DBG1(DBG_IKE, "IDir payload missing");
705: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
706: return send_delete(this);
707: }
708: id = id_payload->get_identification(id_payload);
709: cid = this->ph1->get_id(this->ph1, this->peer_cfg, FALSE);
710: if (cid && !id->matches(id, cid))
711: {
712: DBG1(DBG_IKE, "IDir '%Y' does not match to '%Y'", id, cid);
713: id->destroy(id);
714: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
715: return send_delete(this);
716: }
717: this->ike_sa->set_other_id(this->ike_sa, id);
718:
719: if (!this->ph1->verify_auth(this->ph1, this->method, message,
720: id_payload->get_encoded(id_payload)))
721: {
722: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
723: return send_delete(this);
724: }
725: if (!charon->bus->authorize(charon->bus, FALSE))
726: {
727: DBG1(DBG_IKE, "Main Mode authorization hook forbids IKE_SA, "
728: "cancelling");
729: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
730: return send_delete(this);
731: }
732:
733: switch (this->method)
734: {
735: case AUTH_XAUTH_INIT_PSK:
736: case AUTH_XAUTH_INIT_RSA:
737: case AUTH_HYBRID_INIT_RSA:
738: /* wait for XAUTH request */
739: schedule_timeout(this->ike_sa);
740: break;
741: case AUTH_XAUTH_RESP_PSK:
742: case AUTH_XAUTH_RESP_RSA:
743: case AUTH_HYBRID_RESP_RSA:
744: this->ike_sa->queue_task(this->ike_sa,
745: (task_t*)xauth_create(this->ike_sa, TRUE));
746: break;
747: default:
748: if (charon->ike_sa_manager->check_uniqueness(
749: charon->ike_sa_manager, this->ike_sa, FALSE))
750: {
751: DBG1(DBG_IKE, "cancelling Main Mode due to uniqueness "
752: "policy");
753: return send_delete(this);
754: }
755: if (!establish(this))
756: {
757: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
758: return send_delete(this);
759: }
760: break;
761: }
762: /* check for and prepare mode config push/pull */
763: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
764: {
765: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
766: {
767: this->ike_sa->queue_task(this->ike_sa,
768: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
769: }
770: else
771: {
772: schedule_timeout(this->ike_sa);
773: }
774: }
775: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
776: {
777: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
778: {
779: schedule_timeout(this->ike_sa);
780: }
781: else
782: {
783: this->ike_sa->queue_task(this->ike_sa,
784: (task_t*)mode_config_create(this->ike_sa, TRUE, FALSE));
785: }
786: }
787: return SUCCESS;
788: }
789: default:
790: return FAILED;
791: }
792: }
793:
794: METHOD(task_t, get_type, task_type_t,
795: private_main_mode_t *this)
796: {
797: return TASK_MAIN_MODE;
798: }
799:
800: METHOD(task_t, migrate, void,
801: private_main_mode_t *this, ike_sa_t *ike_sa)
802: {
803: DESTROY_IF(this->peer_cfg);
804: DESTROY_IF(this->proposal);
805: this->ph1->destroy(this->ph1);
806:
807: this->ike_sa = ike_sa;
808: this->state = MM_INIT;
809: this->peer_cfg = NULL;
810: this->proposal = NULL;
811: this->ph1 = phase1_create(ike_sa, this->initiator);
812: }
813:
814: METHOD(task_t, destroy, void,
815: private_main_mode_t *this)
816: {
817: DESTROY_IF(this->peer_cfg);
818: DESTROY_IF(this->proposal);
819: this->ph1->destroy(this->ph1);
820: free(this);
821: }
822:
823: /*
824: * Described in header.
825: */
826: main_mode_t *main_mode_create(ike_sa_t *ike_sa, bool initiator)
827: {
828: private_main_mode_t *this;
829:
830: INIT(this,
831: .public = {
832: .task = {
833: .get_type = _get_type,
834: .migrate = _migrate,
835: .destroy = _destroy,
836: },
837: },
838: .ike_sa = ike_sa,
839: .ph1 = phase1_create(ike_sa, initiator),
840: .initiator = initiator,
841: .state = MM_INIT,
842: );
843:
844: if (initiator)
845: {
846: this->public.task.build = _build_i;
847: this->public.task.process = _process_i;
848: }
849: else
850: {
851: this->public.task.build = _build_r;
852: this->public.task.process = _process_r;
853: }
854:
855: return &this->public;
856: }