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1.1 misho 1: /*
2: * Copyright (C) 2012 Tobias Brunner
3: * HSR Hochschule fuer Technik Rapperswil
4: *
5: * Copyright (C) 2012 Martin Willi
6: * Copyright (C) 2012 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 "aggressive_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_aggressive_mode_t private_aggressive_mode_t;
36:
37: /**
38: * Private members of a aggressive_mode_t task.
39: */
40: struct private_aggressive_mode_t {
41:
42: /**
43: * Public methods and task_t interface.
44: */
45: aggressive_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: /**
88: * Encoded ID payload, without fixed header
89: */
90: chunk_t id_data;
91:
92: /** states of aggressive mode */
93: enum {
94: AM_INIT,
95: AM_AUTH,
96: } state;
97: };
98:
99: /**
100: * Set IKE_SA to established state
101: */
102: static bool establish(private_aggressive_mode_t *this)
103: {
104: if (!charon->bus->authorize(charon->bus, TRUE))
105: {
106: DBG1(DBG_IKE, "final authorization hook forbids IKE_SA, cancelling");
107: return FALSE;
108: }
109:
110: DBG0(DBG_IKE, "IKE_SA %s[%d] established between %H[%Y]...%H[%Y]",
111: this->ike_sa->get_name(this->ike_sa),
112: this->ike_sa->get_unique_id(this->ike_sa),
113: this->ike_sa->get_my_host(this->ike_sa),
114: this->ike_sa->get_my_id(this->ike_sa),
115: this->ike_sa->get_other_host(this->ike_sa),
116: this->ike_sa->get_other_id(this->ike_sa));
117:
118: this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
119: charon->bus->ike_updown(charon->bus, this->ike_sa, TRUE);
120:
121: return TRUE;
122: }
123:
124: /**
125: * Check for notify errors, return TRUE if error found
126: */
127: static bool has_notify_errors(private_aggressive_mode_t *this, message_t *message)
128: {
129: enumerator_t *enumerator;
130: payload_t *payload;
131: bool err = FALSE;
132:
133: enumerator = message->create_payload_enumerator(message);
134: while (enumerator->enumerate(enumerator, &payload))
135: {
136: if (payload->get_type(payload) == PLV1_NOTIFY)
137: {
138: notify_payload_t *notify;
139: notify_type_t type;
140:
141: notify = (notify_payload_t*)payload;
142: type = notify->get_notify_type(notify);
143: if (type < 16384)
144: {
145: DBG1(DBG_IKE, "received %N error notify",
146: notify_type_names, type);
147: err = TRUE;
148: }
149: else
150: {
151: DBG1(DBG_IKE, "received %N notify", notify_type_names, type);
152: }
153: }
154: }
155: enumerator->destroy(enumerator);
156:
157: return err;
158: }
159:
160: /**
161: * Queue a task sending a notify in an INFORMATIONAL exchange
162: */
163: static status_t send_notify(private_aggressive_mode_t *this, notify_type_t type)
164: {
165: notify_payload_t *notify;
166: ike_sa_id_t *ike_sa_id;
167: uint64_t spi_i, spi_r;
168: chunk_t spi;
169:
170: notify = notify_payload_create_from_protocol_and_type(PLV1_NOTIFY,
171: PROTO_IKE, type);
172: ike_sa_id = this->ike_sa->get_id(this->ike_sa);
173: spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
174: spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
175: spi = chunk_cata("cc", chunk_from_thing(spi_i), chunk_from_thing(spi_r));
176: notify->set_spi_data(notify, spi);
177:
178: this->ike_sa->queue_task(this->ike_sa,
179: (task_t*)informational_create(this->ike_sa, notify));
180: /* cancel all active/passive tasks in favour of informational */
181: this->ike_sa->flush_queue(this->ike_sa,
182: this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
183: return ALREADY_DONE;
184: }
185:
186: /**
187: * Queue a delete task if authentication failed as initiator
188: */
189: static status_t send_delete(private_aggressive_mode_t *this)
190: {
191: this->ike_sa->queue_task(this->ike_sa,
192: (task_t*)isakmp_delete_create(this->ike_sa, TRUE));
193: /* cancel all active tasks in favour of informational */
194: this->ike_sa->flush_queue(this->ike_sa,
195: this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
196: return ALREADY_DONE;
197: }
198:
199: /**
200: * Schedule a timeout for the IKE_SA should it not establish
201: */
202: static void schedule_timeout(ike_sa_t *ike_sa)
203: {
204: job_t *job;
205:
206: job = (job_t*)delete_ike_sa_job_create(ike_sa->get_id(ike_sa), FALSE);
207: lib->scheduler->schedule_job(lib->scheduler, job, HALF_OPEN_IKE_SA_TIMEOUT);
208: }
209:
210: METHOD(task_t, build_i, status_t,
211: private_aggressive_mode_t *this, message_t *message)
212: {
213: switch (this->state)
214: {
215: case AM_INIT:
216: {
217: sa_payload_t *sa_payload;
218: id_payload_t *id_payload;
219: linked_list_t *proposals;
220: identification_t *id;
221: packet_t *packet;
222: uint16_t group;
223:
224: DBG0(DBG_IKE, "initiating Aggressive Mode IKE_SA %s[%d] to %H",
225: this->ike_sa->get_name(this->ike_sa),
226: this->ike_sa->get_unique_id(this->ike_sa),
227: this->ike_sa->get_other_host(this->ike_sa));
228: this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
229:
230: this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
231: this->peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
232: this->peer_cfg->get_ref(this->peer_cfg);
233:
234: this->method = this->ph1->get_auth_method(this->ph1, this->peer_cfg);
235: if (this->method == AUTH_NONE)
236: {
237: DBG1(DBG_CFG, "configuration uses unsupported authentication");
238: return FAILED;
239: }
240: this->lifetime = this->peer_cfg->get_reauth_time(this->peer_cfg,
241: FALSE);
242: if (!this->lifetime)
243: { /* fall back to rekey time of no rekey time configured */
244: this->lifetime = this->peer_cfg->get_rekey_time(this->peer_cfg,
245: FALSE);
246: }
247: this->lifetime += this->peer_cfg->get_over_time(this->peer_cfg);
248: proposals = this->ike_cfg->get_proposals(this->ike_cfg);
249: sa_payload = sa_payload_create_from_proposals_v1(proposals,
250: this->lifetime, 0, this->method, MODE_NONE,
251: ENCAP_NONE, 0);
252: proposals->destroy_offset(proposals, offsetof(proposal_t, destroy));
253:
254: message->add_payload(message, &sa_payload->payload_interface);
255:
256: group = this->ike_cfg->get_dh_group(this->ike_cfg);
257: if (group == MODP_NONE)
258: {
259: DBG1(DBG_IKE, "DH group selection failed");
260: return FAILED;
261: }
262: if (!this->ph1->create_dh(this->ph1, group))
263: {
264: DBG1(DBG_IKE, "DH group %N not supported",
265: diffie_hellman_group_names, group);
266: return FAILED;
267: }
268: if (!this->ph1->add_nonce_ke(this->ph1, message))
269: {
270: return FAILED;
271: }
272: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
273: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
274: id_payload = id_payload_create_from_identification(PLV1_ID, id);
275: this->id_data = id_payload->get_encoded(id_payload);
276: message->add_payload(message, &id_payload->payload_interface);
277:
278: /* pregenerate message to store SA payload */
279: if (this->ike_sa->generate_message(this->ike_sa, message,
280: &packet) != SUCCESS)
281: {
282: DBG1(DBG_IKE, "pregenerating SA payload failed");
283: return FAILED;
284: }
285: packet->destroy(packet);
286: if (!this->ph1->save_sa_payload(this->ph1, message))
287: {
288: DBG1(DBG_IKE, "SA payload invalid");
289: return FAILED;
290: }
291: this->state = AM_AUTH;
292: return NEED_MORE;
293: }
294: case AM_AUTH:
295: {
296: if (!this->ph1->build_auth(this->ph1, this->method, message,
297: this->id_data))
298: {
299: this->id_data = chunk_empty;
300: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
301: return send_notify(this, AUTHENTICATION_FAILED);
302: }
303: this->id_data = chunk_empty;
304:
305: switch (this->method)
306: {
307: case AUTH_XAUTH_INIT_PSK:
308: case AUTH_XAUTH_INIT_RSA:
309: case AUTH_HYBRID_INIT_RSA:
310: /* wait for XAUTH request */
311: schedule_timeout(this->ike_sa);
312: break;
313: case AUTH_XAUTH_RESP_PSK:
314: case AUTH_XAUTH_RESP_RSA:
315: case AUTH_HYBRID_RESP_RSA:
316: this->ike_sa->queue_task(this->ike_sa,
317: (task_t*)xauth_create(this->ike_sa, TRUE));
318: break;
319: default:
320: if (charon->ike_sa_manager->check_uniqueness(
321: charon->ike_sa_manager, this->ike_sa, FALSE))
322: {
323: DBG1(DBG_IKE, "cancelling Aggressive Mode due to "
324: "uniqueness policy");
325: return send_notify(this, AUTHENTICATION_FAILED);
326: }
327: if (!establish(this))
328: {
329: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
330: return send_notify(this, AUTHENTICATION_FAILED);
331: }
332: break;
333: }
334: /* check for and prepare mode config push/pull */
335: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
336: {
337: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
338: {
339: this->ike_sa->queue_task(this->ike_sa,
340: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
341: }
342: else
343: {
344: schedule_timeout(this->ike_sa);
345: }
346: }
347: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
348: {
349: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
350: {
351: schedule_timeout(this->ike_sa);
352: }
353: else
354: {
355: this->ike_sa->queue_task(this->ike_sa,
356: (task_t*)mode_config_create(this->ike_sa, TRUE, FALSE));
357: }
358: }
359: return SUCCESS;
360: }
361: default:
362: return FAILED;
363: }
364: }
365:
366: METHOD(task_t, process_r, status_t,
367: private_aggressive_mode_t *this, message_t *message)
368: {
369: switch (this->state)
370: {
371: case AM_INIT:
372: {
373: sa_payload_t *sa_payload;
374: id_payload_t *id_payload;
375: identification_t *id;
376: linked_list_t *list;
377: proposal_selection_flag_t flags = PROPOSAL_SKIP_PRIVATE;
378: uint16_t group;
379:
380: this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
381: DBG0(DBG_IKE, "%H is initiating a Aggressive Mode IKE_SA",
382: message->get_source(message));
383: this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
384:
385: this->ike_sa->update_hosts(this->ike_sa,
386: message->get_destination(message),
1.1.1.2 ! misho 387: message->get_source(message),
! 388: UPDATE_HOSTS_FORCE_ADDRS);
1.1 misho 389:
390: sa_payload = (sa_payload_t*)message->get_payload(message,
391: PLV1_SECURITY_ASSOCIATION);
392: if (!sa_payload)
393: {
394: DBG1(DBG_IKE, "SA payload missing");
395: return send_notify(this, INVALID_PAYLOAD_TYPE);
396: }
397: if (!this->ph1->save_sa_payload(this->ph1, message))
398: {
399: return send_notify(this, INVALID_PAYLOAD_TYPE);
400: }
401:
402: list = sa_payload->get_proposals(sa_payload);
403: if (!lib->settings->get_bool(lib->settings,
404: "%s.prefer_configured_proposals", TRUE, lib->ns))
405: {
406: flags = PROPOSAL_PREFER_SUPPLIED;
407: }
408: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg, list,
409: flags);
410: list->destroy_offset(list, offsetof(proposal_t, destroy));
411: if (!this->proposal)
412: {
413: DBG1(DBG_IKE, "no proposal found");
414: return send_notify(this, NO_PROPOSAL_CHOSEN);
415: }
416: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
417:
418: this->method = sa_payload->get_auth_method(sa_payload);
419: this->lifetime = sa_payload->get_lifetime(sa_payload,
420: this->proposal);
421:
422: switch (this->method)
423: {
424: case AUTH_XAUTH_INIT_PSK:
425: case AUTH_XAUTH_RESP_PSK:
426: case AUTH_PSK:
427: if (!lib->settings->get_bool(lib->settings, "%s.i_dont_care"
428: "_about_security_and_use_aggressive_mode_psk",
429: FALSE, lib->ns))
430: {
431: DBG1(DBG_IKE, "Aggressive Mode PSK disabled for "
432: "security reasons");
433: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
434: return send_notify(this, AUTHENTICATION_FAILED);
435: }
436: break;
437: default:
438: break;
439: }
440:
441: if (!this->proposal->get_algorithm(this->proposal,
442: DIFFIE_HELLMAN_GROUP, &group, NULL))
443: {
444: DBG1(DBG_IKE, "DH group selection failed");
445: return send_notify(this, INVALID_KEY_INFORMATION);
446: }
447: if (!this->ph1->create_dh(this->ph1, group))
448: {
449: DBG1(DBG_IKE, "negotiated DH group not supported");
450: return send_notify(this, INVALID_KEY_INFORMATION);
451: }
452: if (!this->ph1->get_nonce_ke(this->ph1, message))
453: {
454: return send_notify(this, INVALID_PAYLOAD_TYPE);
455: }
456:
457: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
458: if (!id_payload)
459: {
460: DBG1(DBG_IKE, "IDii payload missing");
461: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
462: return send_notify(this, INVALID_PAYLOAD_TYPE);
463: }
464:
465: id = id_payload->get_identification(id_payload);
466: this->id_data = id_payload->get_encoded(id_payload);
467: this->ike_sa->set_other_id(this->ike_sa, id);
468: this->peer_cfg = this->ph1->select_config(this->ph1,
469: this->method, TRUE, id);
470: if (!this->peer_cfg)
471: {
472: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
473: return send_notify(this, AUTHENTICATION_FAILED);
474: }
475: this->ike_sa->set_peer_cfg(this->ike_sa, this->peer_cfg);
476:
477: this->state = AM_AUTH;
478: if (has_notify_errors(this, message))
479: {
480: return FAILED;
481: }
482: return NEED_MORE;
483: }
484: case AM_AUTH:
485: {
486: adopt_children_job_t *job = NULL;
487: xauth_t *xauth = NULL;
488:
489: while (TRUE)
490: {
491: if (this->ph1->verify_auth(this->ph1, this->method, message,
492: chunk_clone(this->id_data)))
493: {
494: break;
495: }
496: this->peer_cfg->destroy(this->peer_cfg);
497: this->peer_cfg = this->ph1->select_config(this->ph1,
498: this->method, TRUE, NULL);
499: if (!this->peer_cfg)
500: {
501: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
502: return send_delete(this);
503: }
504: this->ike_sa->set_peer_cfg(this->ike_sa, this->peer_cfg);
505: }
506:
507: if (!charon->bus->authorize(charon->bus, FALSE))
508: {
509: DBG1(DBG_IKE, "Aggressive Mode authorization hook forbids "
510: "IKE_SA, cancelling");
511: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
512: return send_delete(this);
513: }
514:
515: switch (this->method)
516: {
517: case AUTH_XAUTH_INIT_PSK:
518: case AUTH_XAUTH_INIT_RSA:
519: case AUTH_HYBRID_INIT_RSA:
520: xauth = xauth_create(this->ike_sa, TRUE);
521: this->ike_sa->queue_task(this->ike_sa, (task_t*)xauth);
522: break;
523: case AUTH_XAUTH_RESP_PSK:
524: case AUTH_XAUTH_RESP_RSA:
525: case AUTH_HYBRID_RESP_RSA:
526: /* wait for XAUTH request */
527: break;
528: default:
529: if (charon->ike_sa_manager->check_uniqueness(
530: charon->ike_sa_manager, this->ike_sa, FALSE))
531: {
532: DBG1(DBG_IKE, "cancelling Aggressive Mode due to "
533: "uniqueness policy");
534: return send_delete(this);
535: }
536: if (!establish(this))
537: {
538: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
539: return send_delete(this);
540: }
541: job = adopt_children_job_create(
542: this->ike_sa->get_id(this->ike_sa));
543: break;
544: }
545: /* check for and prepare mode config push/pull */
546: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
547: {
548: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
549: {
550: this->ike_sa->queue_task(this->ike_sa,
551: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
552: }
553: }
554: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
555: {
556: if (!this->peer_cfg->use_pull_mode(this->peer_cfg))
557: {
558: if (job)
559: {
560: job->queue_task(job, (task_t*)
561: mode_config_create(this->ike_sa, TRUE, FALSE));
562: }
563: else if (xauth)
564: {
565: xauth->queue_mode_config_push(xauth);
566: }
567: else
568: {
569: this->ike_sa->queue_task(this->ike_sa, (task_t*)
570: mode_config_create(this->ike_sa, TRUE, FALSE));
571: }
572: }
573: }
574: if (job)
575: {
576: lib->processor->queue_job(lib->processor, (job_t*)job);
577: }
578: return SUCCESS;
579: }
580: default:
581: return FAILED;
582: }
583: }
584:
585: METHOD(task_t, build_r, status_t,
586: private_aggressive_mode_t *this, message_t *message)
587: {
588: if (this->state == AM_AUTH)
589: {
590: sa_payload_t *sa_payload;
591: id_payload_t *id_payload;
592: identification_t *id;
593:
594: sa_payload = sa_payload_create_from_proposal_v1(this->proposal,
595: this->lifetime, 0, this->method, MODE_NONE,
596: ENCAP_NONE, 0);
597: message->add_payload(message, &sa_payload->payload_interface);
598:
599: if (!this->ph1->add_nonce_ke(this->ph1, message))
600: {
601: return send_notify(this, INVALID_KEY_INFORMATION);
602: }
603: if (!this->ph1->create_hasher(this->ph1))
604: {
605: return send_notify(this, NO_PROPOSAL_CHOSEN);
606: }
607: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
608: {
609: return send_notify(this, INVALID_KEY_INFORMATION);
610: }
611:
612: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
613: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
614:
615: id_payload = id_payload_create_from_identification(PLV1_ID, id);
616: message->add_payload(message, &id_payload->payload_interface);
617:
618: if (!this->ph1->build_auth(this->ph1, this->method, message,
619: id_payload->get_encoded(id_payload)))
620: {
621: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
622: return send_notify(this, AUTHENTICATION_FAILED);
623: }
624: return NEED_MORE;
625: }
626: return FAILED;
627: }
628:
629: METHOD(task_t, process_i, status_t,
630: private_aggressive_mode_t *this, message_t *message)
631: {
632: if (this->state == AM_AUTH)
633: {
634: auth_method_t method;
635: sa_payload_t *sa_payload;
636: id_payload_t *id_payload;
637: identification_t *id, *cid;
638: linked_list_t *list;
639: uint32_t lifetime;
640:
641: sa_payload = (sa_payload_t*)message->get_payload(message,
642: PLV1_SECURITY_ASSOCIATION);
643: if (!sa_payload)
644: {
645: DBG1(DBG_IKE, "SA payload missing");
646: return send_notify(this, INVALID_PAYLOAD_TYPE);
647: }
648: list = sa_payload->get_proposals(sa_payload);
649: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg, list, 0);
650: list->destroy_offset(list, offsetof(proposal_t, destroy));
651: if (!this->proposal)
652: {
653: DBG1(DBG_IKE, "no proposal found");
654: return send_notify(this, NO_PROPOSAL_CHOSEN);
655: }
656: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
657:
658: lifetime = sa_payload->get_lifetime(sa_payload, this->proposal);
659: if (lifetime != this->lifetime)
660: {
661: DBG1(DBG_IKE, "received lifetime %us does not match configured "
662: "lifetime %us", lifetime, this->lifetime);
663: }
664: this->lifetime = lifetime;
665: method = sa_payload->get_auth_method(sa_payload);
666: if (method != this->method)
667: {
668: DBG1(DBG_IKE, "received %N authentication, but configured %N, "
669: "continue with configured", auth_method_names, method,
670: auth_method_names, this->method);
671: }
672: if (!this->ph1->get_nonce_ke(this->ph1, message))
673: {
674: return send_notify(this, INVALID_PAYLOAD_TYPE);
675: }
676: if (!this->ph1->create_hasher(this->ph1))
677: {
678: return send_notify(this, NO_PROPOSAL_CHOSEN);
679: }
680:
681: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
682: if (!id_payload)
683: {
684: DBG1(DBG_IKE, "IDir payload missing");
685: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
686: return send_delete(this);
687: }
688: id = id_payload->get_identification(id_payload);
689: cid = this->ph1->get_id(this->ph1, this->peer_cfg, FALSE);
690: if (cid && !id->matches(id, cid))
691: {
692: DBG1(DBG_IKE, "IDir '%Y' does not match to '%Y'", id, cid);
693: id->destroy(id);
694: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
695: return send_notify(this, INVALID_ID_INFORMATION);
696: }
697: this->ike_sa->set_other_id(this->ike_sa, id);
698:
699: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
700: {
701: return send_notify(this, INVALID_KEY_INFORMATION);
702: }
703: if (!this->ph1->verify_auth(this->ph1, this->method, message,
704: id_payload->get_encoded(id_payload)))
705: {
706: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
707: return send_notify(this, AUTHENTICATION_FAILED);
708: }
709: if (!charon->bus->authorize(charon->bus, FALSE))
710: {
711: DBG1(DBG_IKE, "Aggressive Mode authorization hook forbids IKE_SA, "
712: "cancelling");
713: return send_notify(this, AUTHENTICATION_FAILED);
714: }
715:
716: return NEED_MORE;
717: }
718: return FAILED;
719: }
720:
721: METHOD(task_t, get_type, task_type_t,
722: private_aggressive_mode_t *this)
723: {
724: return TASK_AGGRESSIVE_MODE;
725: }
726:
727: METHOD(task_t, migrate, void,
728: private_aggressive_mode_t *this, ike_sa_t *ike_sa)
729: {
730: DESTROY_IF(this->peer_cfg);
731: DESTROY_IF(this->proposal);
732: this->ph1->destroy(this->ph1);
733: chunk_free(&this->id_data);
734:
735: this->ike_sa = ike_sa;
736: this->state = AM_INIT;
737: this->peer_cfg = NULL;
738: this->proposal = NULL;
739: this->ph1 = phase1_create(ike_sa, this->initiator);
740: }
741:
742: METHOD(task_t, destroy, void,
743: private_aggressive_mode_t *this)
744: {
745: DESTROY_IF(this->peer_cfg);
746: DESTROY_IF(this->proposal);
747: this->ph1->destroy(this->ph1);
748: chunk_free(&this->id_data);
749: free(this);
750: }
751:
752: /*
753: * Described in header.
754: */
755: aggressive_mode_t *aggressive_mode_create(ike_sa_t *ike_sa, bool initiator)
756: {
757: private_aggressive_mode_t *this;
758:
759: INIT(this,
760: .public = {
761: .task = {
762: .get_type = _get_type,
763: .migrate = _migrate,
764: .destroy = _destroy,
765: },
766: },
767: .ike_sa = ike_sa,
768: .ph1 = phase1_create(ike_sa, initiator),
769: .initiator = initiator,
770: .state = AM_INIT,
771: );
772:
773: if (initiator)
774: {
775: this->public.task.build = _build_i;
776: this->public.task.process = _process_i;
777: }
778: else
779: {
780: this->public.task.build = _build_r;
781: this->public.task.process = _process_r;
782: }
783:
784: return &this->public;
785: }