support of CA-based ipsec policies
[strongswan.git] / src / charon / sa / tasks / ike_auth.c
1 /**
2 * @file ike_auth.c
3 *
4 * @brief Implementation of the ike_auth task.
5 *
6 */
7
8 /*
9 * Copyright (C) 2005-2007 Martin Willi
10 * Copyright (C) 2005 Jan Hutter
11 * Hochschule fuer Technik Rapperswil
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
17 *
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
20 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 * for more details.
22 */
23
24 #include "ike_auth.h"
25
26 #include <string.h>
27
28 #include <daemon.h>
29 #include <crypto/diffie_hellman.h>
30 #include <encoding/payloads/id_payload.h>
31 #include <encoding/payloads/auth_payload.h>
32 #include <encoding/payloads/eap_payload.h>
33 #include <encoding/payloads/nonce_payload.h>
34 #include <sa/authenticators/eap_authenticator.h>
35
36
37
38 typedef struct private_ike_auth_t private_ike_auth_t;
39
40 /**
41 * Private members of a ike_auth_t task.
42 */
43 struct private_ike_auth_t {
44
45 /**
46 * Public methods and task_t interface.
47 */
48 ike_auth_t public;
49
50 /**
51 * Assigned IKE_SA.
52 */
53 ike_sa_t *ike_sa;
54
55 /**
56 * Are we the initiator?
57 */
58 bool initiator;
59
60 /**
61 * Nonce chosen by us in ike_init
62 */
63 chunk_t my_nonce;
64
65 /**
66 * Nonce chosen by peer in ike_init
67 */
68 chunk_t other_nonce;
69
70 /**
71 * IKE_SA_INIT message sent by us
72 */
73 packet_t *my_packet;
74
75 /**
76 * IKE_SA_INIT message sent by peer
77 */
78 packet_t *other_packet;
79
80 /**
81 * EAP authenticator when using EAP
82 */
83 eap_authenticator_t *eap_auth;
84
85 /**
86 * EAP payload received and ready to process
87 */
88 eap_payload_t *eap_payload;
89
90 /**
91 * has the peer been authenticated successfully?
92 */
93 bool peer_authenticated;
94 };
95
96 /**
97 * build the AUTH payload
98 */
99 static status_t build_auth(private_ike_auth_t *this, message_t *message)
100 {
101 authenticator_t *auth;
102 auth_payload_t *auth_payload;
103 peer_cfg_t *config;
104 auth_method_t method;
105 status_t status;
106
107 /* create own authenticator and add auth payload */
108 config = this->ike_sa->get_peer_cfg(this->ike_sa);
109 if (!config)
110 {
111 SIG(IKE_UP_FAILED, "unable to authenticate, no peer config found");
112 return FAILED;
113 }
114 method = config->get_auth_method(config);
115
116 auth = authenticator_create(this->ike_sa, method);
117 if (auth == NULL)
118 {
119 SIG(IKE_UP_FAILED, "configured authentication method %N not supported",
120 auth_method_names, method);
121 return FAILED;
122 }
123
124 status = auth->build(auth, this->my_packet->get_data(this->my_packet),
125 this->other_nonce, &auth_payload);
126 auth->destroy(auth);
127 if (status != SUCCESS)
128 {
129 SIG(IKE_UP_FAILED, "generating authentication data failed");
130 return FAILED;
131 }
132 message->add_payload(message, (payload_t*)auth_payload);
133 return SUCCESS;
134 }
135
136 /**
137 * build ID payload(s)
138 */
139 static status_t build_id(private_ike_auth_t *this, message_t *message)
140 {
141 identification_t *me, *other;
142 id_payload_t *id;
143 peer_cfg_t *config;
144
145 me = this->ike_sa->get_my_id(this->ike_sa);
146 other = this->ike_sa->get_other_id(this->ike_sa);
147 config = this->ike_sa->get_peer_cfg(this->ike_sa);
148
149 if (me->contains_wildcards(me))
150 {
151 me = config->get_my_id(config);
152 if (me->contains_wildcards(me))
153 {
154 SIG(IKE_UP_FAILED, "negotiation of own ID failed");
155 return FAILED;
156 }
157 this->ike_sa->set_my_id(this->ike_sa, me->clone(me));
158 }
159
160 id = id_payload_create_from_identification(this->initiator, me);
161 message->add_payload(message, (payload_t*)id);
162
163 /* as initiator, include other ID if it does not contain wildcards */
164 if (this->initiator && !other->contains_wildcards(other))
165 {
166 id = id_payload_create_from_identification(FALSE, other);
167 message->add_payload(message, (payload_t*)id);
168 }
169 return SUCCESS;
170 }
171
172 /**
173 * process AUTH payload
174 */
175 static status_t process_auth(private_ike_auth_t *this, message_t *message)
176 {
177 auth_payload_t *auth_payload;
178 authenticator_t *auth;
179 auth_method_t auth_method;
180 status_t status;
181
182 auth_payload = (auth_payload_t*)message->get_payload(message, AUTHENTICATION);
183
184 if (auth_payload == NULL)
185 {
186 /* AUTH payload is missing, client wants to use EAP authentication */
187 return NOT_FOUND;
188 }
189
190 auth_method = auth_payload->get_auth_method(auth_payload);
191 auth = authenticator_create(this->ike_sa, auth_method);
192
193 if (auth == NULL)
194 {
195 SIG(IKE_UP_FAILED, "authentication method %N used by %D not "
196 "supported", auth_method_names, auth_method,
197 this->ike_sa->get_other_id(this->ike_sa));
198 return NOT_SUPPORTED;
199 }
200 status = auth->verify(auth, this->other_packet->get_data(this->other_packet),
201 this->my_nonce, auth_payload);
202 auth->destroy(auth);
203 if (status != SUCCESS)
204 {
205 SIG(IKE_UP_FAILED, "authentication of '%D' with %N failed",
206 this->ike_sa->get_other_id(this->ike_sa),
207 auth_method_names, auth_method);
208 return FAILED;
209 }
210 return SUCCESS;
211 }
212
213 /**
214 * process ID payload(s)
215 */
216 static status_t process_id(private_ike_auth_t *this, message_t *message)
217 {
218 identification_t *id, *req;
219 id_payload_t *idr, *idi;
220
221 idi = (id_payload_t*)message->get_payload(message, ID_INITIATOR);
222 idr = (id_payload_t*)message->get_payload(message, ID_RESPONDER);
223
224 if ((this->initiator && idr == NULL) || (!this->initiator && idi == NULL))
225 {
226 SIG(IKE_UP_FAILED, "ID payload missing in message");
227 return FAILED;
228 }
229
230 if (this->initiator)
231 {
232 id = idr->get_identification(idr);
233 req = this->ike_sa->get_other_id(this->ike_sa);
234 if (!id->matches(id, req, NULL))
235 {
236 SIG(IKE_UP_FAILED, "peer ID %D unacceptable, %D required", id, req);
237 id->destroy(id);
238 return FAILED;
239 }
240 this->ike_sa->set_other_id(this->ike_sa, id);
241 }
242 else
243 {
244 id = idi->get_identification(idi);
245 this->ike_sa->set_other_id(this->ike_sa, id);
246 if (idr)
247 {
248 id = idr->get_identification(idr);
249 this->ike_sa->set_my_id(this->ike_sa, id);
250 }
251 }
252 return SUCCESS;
253 }
254
255 /**
256 * collect the needed information in the IKE_SA_INIT exchange from our message
257 */
258 static status_t collect_my_init_data(private_ike_auth_t *this, message_t *message)
259 {
260 nonce_payload_t *nonce;
261
262 /* get the nonce that was generated in ike_init */
263 nonce = (nonce_payload_t*)message->get_payload(message, NONCE);
264 if (nonce == NULL)
265 {
266 return FAILED;
267 }
268 this->my_nonce = nonce->get_nonce(nonce);
269
270 /* pre-generate the message, so we can store it for us */
271 if (this->ike_sa->generate_message(this->ike_sa, message,
272 &this->my_packet) != SUCCESS)
273 {
274 return FAILED;
275 }
276 return NEED_MORE;
277 }
278
279 /**
280 * collect the needed information in the IKE_SA_INIT exchange from others message
281 */
282 static status_t collect_other_init_data(private_ike_auth_t *this, message_t *message)
283 {
284 /* we collect the needed information in the IKE_SA_INIT exchange */
285 nonce_payload_t *nonce;
286
287 /* get the nonce that was generated in ike_init */
288 nonce = (nonce_payload_t*)message->get_payload(message, NONCE);
289 if (nonce == NULL)
290 {
291 return FAILED;
292 }
293 this->other_nonce = nonce->get_nonce(nonce);
294
295 /* pre-generate the message, so we can store it for us */
296 this->other_packet = message->get_packet(message);
297 return NEED_MORE;
298 }
299
300 /**
301 * Implementation of task_t.build to create AUTH payload from EAP data
302 */
303 static status_t build_auth_eap(private_ike_auth_t *this, message_t *message)
304 {
305 authenticator_t *auth;
306 auth_payload_t *auth_payload;
307
308 auth = (authenticator_t*)this->eap_auth;
309 if (auth->build(auth, this->my_packet->get_data(this->my_packet),
310 this->other_nonce, &auth_payload) != SUCCESS)
311 {
312 SIG(IKE_UP_FAILED, "generating authentication data failed");
313 if (!this->initiator)
314 {
315 message->add_notify(message, TRUE, AUTHENTICATION_FAILED, chunk_empty);
316 }
317 return FAILED;
318 }
319 message->add_payload(message, (payload_t*)auth_payload);
320 if (!this->initiator)
321 {
322 this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
323 SIG(IKE_UP_SUCCESS, "IKE_SA established between %D[%H]...[%H]%D",
324 this->ike_sa->get_my_id(this->ike_sa),
325 this->ike_sa->get_my_host(this->ike_sa),
326 this->ike_sa->get_other_host(this->ike_sa),
327 this->ike_sa->get_other_id(this->ike_sa));
328 return SUCCESS;
329 }
330 return NEED_MORE;
331 }
332
333 /**
334 * Implementation of task_t.process to verify AUTH payload after EAP
335 */
336 static status_t process_auth_eap(private_ike_auth_t *this, message_t *message)
337 {
338 auth_payload_t *auth_payload;
339 authenticator_t *auth;
340
341 auth_payload = (auth_payload_t*)message->get_payload(message, AUTHENTICATION);
342 this->peer_authenticated = FALSE;
343
344 if (auth_payload)
345 {
346 auth = (authenticator_t*)this->eap_auth;
347 if (auth->verify(auth, this->other_packet->get_data(this->other_packet),
348 this->my_nonce, auth_payload) == SUCCESS)
349 {
350 this->peer_authenticated = TRUE;
351 }
352 }
353
354 if (!this->peer_authenticated)
355 {
356 SIG(IKE_UP_FAILED, "authentication of '%D' with %N failed",
357 this->ike_sa->get_other_id(this->ike_sa),
358 auth_method_names, AUTH_EAP);
359 if (this->initiator)
360 {
361 return FAILED;
362 }
363 return NEED_MORE;
364 }
365 if (this->initiator)
366 {
367 this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
368 SIG(IKE_UP_SUCCESS, "IKE_SA established between %D[%H]...[%H]%D",
369 this->ike_sa->get_my_id(this->ike_sa),
370 this->ike_sa->get_my_host(this->ike_sa),
371 this->ike_sa->get_other_host(this->ike_sa),
372 this->ike_sa->get_other_id(this->ike_sa));
373 return SUCCESS;
374 }
375 return NEED_MORE;
376 }
377
378 /**
379 * Implementation of task_t.process for EAP exchanges
380 */
381 static status_t process_eap_i(private_ike_auth_t *this, message_t *message)
382 {
383 eap_payload_t *eap;
384
385 eap = (eap_payload_t*)message->get_payload(message, EXTENSIBLE_AUTHENTICATION);
386 if (eap == NULL)
387 {
388 SIG(IKE_UP_FAILED, "EAP payload missing");
389 return FAILED;
390 }
391 switch (this->eap_auth->process(this->eap_auth, eap, &eap))
392 {
393 case NEED_MORE:
394 this->eap_payload = eap;
395 return NEED_MORE;
396 case SUCCESS:
397 /* EAP exchange completed, now create and process AUTH */
398 this->eap_payload = NULL;
399 this->public.task.build = (status_t(*)(task_t*,message_t*))build_auth_eap;
400 this->public.task.process = (status_t(*)(task_t*,message_t*))process_auth_eap;
401 return NEED_MORE;
402 default:
403 this->eap_payload = NULL;
404 SIG(IKE_UP_FAILED, "failed to authenticate against %D using EAP",
405 this->ike_sa->get_other_id(this->ike_sa));
406 return FAILED;
407 }
408 }
409
410 /**
411 * Implementation of task_t.process for EAP exchanges
412 */
413 static status_t process_eap_r(private_ike_auth_t *this, message_t *message)
414 {
415 this->eap_payload = (eap_payload_t*)message->get_payload(message,
416 EXTENSIBLE_AUTHENTICATION);
417 return NEED_MORE;
418 }
419
420 /**
421 * Implementation of task_t.build for EAP exchanges
422 */
423 static status_t build_eap_i(private_ike_auth_t *this, message_t *message)
424 {
425 message->add_payload(message, (payload_t*)this->eap_payload);
426 return NEED_MORE;
427 }
428
429 /**
430 * Implementation of task_t.build for EAP exchanges
431 */
432 static status_t build_eap_r(private_ike_auth_t *this, message_t *message)
433 {
434 status_t status = NEED_MORE;
435 eap_payload_t *eap;
436
437 if (this->eap_payload == NULL)
438 {
439 SIG(IKE_UP_FAILED, "EAP payload missing");
440 return FAILED;
441 }
442
443 switch (this->eap_auth->process(this->eap_auth, this->eap_payload, &eap))
444 {
445 case NEED_MORE:
446
447 break;
448 case SUCCESS:
449 /* EAP exchange completed, now create and process AUTH */
450 this->public.task.build = (status_t(*)(task_t*,message_t*))build_auth_eap;
451 this->public.task.process = (status_t(*)(task_t*,message_t*))process_auth_eap;
452 break;
453 default:
454 SIG(IKE_UP_FAILED, "authentication of '%D' with %N failed",
455 this->ike_sa->get_other_id(this->ike_sa),
456 auth_method_names, AUTH_EAP);
457 status = FAILED;
458 break;
459 }
460 message->add_payload(message, (payload_t*)eap);
461 return status;
462 }
463
464 /**
465 * Implementation of task_t.build for initiator
466 */
467 static status_t build_i(private_ike_auth_t *this, message_t *message)
468 {
469 peer_cfg_t *config;
470
471 if (message->get_exchange_type(message) == IKE_SA_INIT)
472 {
473 return collect_my_init_data(this, message);
474 }
475
476 if (build_id(this, message) != SUCCESS)
477 {
478 return FAILED;
479 }
480
481 config = this->ike_sa->get_peer_cfg(this->ike_sa);
482 if (config->get_auth_method(config) == AUTH_EAP)
483 {
484 this->eap_auth = eap_authenticator_create(this->ike_sa);
485 }
486 else
487 {
488 if (build_auth(this, message) != SUCCESS)
489 {
490 return FAILED;
491 }
492 }
493
494 return NEED_MORE;
495 }
496
497 /**
498 * Implementation of task_t.process for responder
499 */
500 static status_t process_r(private_ike_auth_t *this, message_t *message)
501 {
502 peer_cfg_t *config;
503
504 if (message->get_exchange_type(message) == IKE_SA_INIT)
505 {
506 return collect_other_init_data(this, message);
507 }
508
509 if (process_id(this, message) != SUCCESS)
510 {
511 return NEED_MORE;
512 }
513
514 switch (process_auth(this, message))
515 {
516 case SUCCESS:
517 this->peer_authenticated = TRUE;
518 break;
519 case NOT_FOUND:
520 /* use EAP if no AUTH payload found */
521 this->eap_auth = eap_authenticator_create(this->ike_sa);
522 break;
523 default:
524 break;
525 }
526
527 config = charon->backends->get_peer_cfg(charon->backends,
528 this->ike_sa->get_my_id(this->ike_sa),
529 this->ike_sa->get_other_id(this->ike_sa),
530 this->ike_sa->get_other_ca(this->ike_sa));
531 if (config)
532 {
533 this->ike_sa->set_peer_cfg(this->ike_sa, config);
534 config->destroy(config);
535 }
536
537 return NEED_MORE;
538 }
539
540 /**
541 * Implementation of task_t.build for responder
542 */
543 static status_t build_r(private_ike_auth_t *this, message_t *message)
544 {
545 peer_cfg_t *config;
546 eap_type_t eap_type;
547 eap_payload_t *eap_payload;
548 status_t status;
549
550 if (message->get_exchange_type(message) == IKE_SA_INIT)
551 {
552 return collect_my_init_data(this, message);
553 }
554
555 config = this->ike_sa->get_peer_cfg(this->ike_sa);
556 if (config == NULL)
557 {
558 SIG(IKE_UP_FAILED, "no matching config found for %D...%D",
559 this->ike_sa->get_my_id(this->ike_sa),
560 this->ike_sa->get_other_id(this->ike_sa));
561 message->add_notify(message, TRUE, AUTHENTICATION_FAILED, chunk_empty);
562 return FAILED;
563 }
564
565 if (build_id(this, message) != SUCCESS ||
566 build_auth(this, message) != SUCCESS)
567 {
568 message->add_notify(message, TRUE, AUTHENTICATION_FAILED, chunk_empty);
569 return FAILED;
570 }
571
572 /* use "traditional" authentication if we could authenticate peer */
573 if (this->peer_authenticated)
574 {
575 this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
576 SIG(IKE_UP_SUCCESS, "IKE_SA established between %D[%H]...[%H]%D",
577 this->ike_sa->get_my_id(this->ike_sa),
578 this->ike_sa->get_my_host(this->ike_sa),
579 this->ike_sa->get_other_host(this->ike_sa),
580 this->ike_sa->get_other_id(this->ike_sa));
581 return SUCCESS;
582 }
583
584 if (this->eap_auth == NULL)
585 {
586 /* peer not authenticated, nor does it want to use EAP */
587 message->add_notify(message, TRUE, AUTHENTICATION_FAILED, chunk_empty);
588 return FAILED;
589 }
590
591 /* initiate EAP authenitcation */
592 eap_type = config->get_eap_type(config);
593 status = this->eap_auth->initiate(this->eap_auth, eap_type, &eap_payload);
594 message->add_payload(message, (payload_t*)eap_payload);
595 if (status != NEED_MORE)
596 {
597 SIG(IKE_UP_FAILED, "unable to initiate EAP authentication");
598 return FAILED;
599 }
600
601 /* switch to EAP methods */
602 this->public.task.build = (status_t(*)(task_t*,message_t*))build_eap_r;
603 this->public.task.process = (status_t(*)(task_t*,message_t*))process_eap_r;
604 return NEED_MORE;
605 }
606
607 /**
608 * Implementation of task_t.process for initiator
609 */
610 static status_t process_i(private_ike_auth_t *this, message_t *message)
611 {
612 iterator_t *iterator;
613 payload_t *payload;
614
615 if (message->get_exchange_type(message) == IKE_SA_INIT)
616 {
617 return collect_other_init_data(this, message);
618 }
619
620 iterator = message->get_payload_iterator(message);
621 while (iterator->iterate(iterator, (void**)&payload))
622 {
623 if (payload->get_type(payload) == NOTIFY)
624 {
625 notify_payload_t *notify = (notify_payload_t*)payload;
626 notify_type_t type = notify->get_notify_type(notify);
627
628 switch (type)
629 {
630 case NO_PROPOSAL_CHOSEN:
631 case SINGLE_PAIR_REQUIRED:
632 case NO_ADDITIONAL_SAS:
633 case INTERNAL_ADDRESS_FAILURE:
634 case FAILED_CP_REQUIRED:
635 case TS_UNACCEPTABLE:
636 case INVALID_SELECTORS:
637 /* these are errors, but are not critical as only the
638 * CHILD_SA won't get build, but IKE_SA establishes anyway */
639 break;
640 default:
641 {
642 if (type < 16383)
643 {
644 SIG(IKE_UP_FAILED, "received %N notify error",
645 notify_type_names, type);
646 iterator->destroy(iterator);
647 return FAILED;
648 }
649 DBG1(DBG_IKE, "received %N notify",
650 notify_type_names, type);
651 break;
652 }
653 }
654 }
655 }
656 iterator->destroy(iterator);
657
658 if (process_id(this, message) != SUCCESS ||
659 process_auth(this, message) != SUCCESS)
660 {
661 return FAILED;
662 }
663
664 if (this->eap_auth)
665 {
666 /* switch to EAP authentication methods */
667 this->public.task.build = (status_t(*)(task_t*,message_t*))build_eap_i;
668 this->public.task.process = (status_t(*)(task_t*,message_t*))process_eap_i;
669 return process_eap_i(this, message);
670 }
671
672 this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
673 SIG(IKE_UP_SUCCESS, "IKE_SA established between %D[%H]...[%H]%D",
674 this->ike_sa->get_my_id(this->ike_sa),
675 this->ike_sa->get_my_host(this->ike_sa),
676 this->ike_sa->get_other_host(this->ike_sa),
677 this->ike_sa->get_other_id(this->ike_sa));
678 return SUCCESS;
679 }
680
681 /**
682 * Implementation of task_t.get_type
683 */
684 static task_type_t get_type(private_ike_auth_t *this)
685 {
686 return IKE_AUTHENTICATE;
687 }
688
689 /**
690 * Implementation of task_t.migrate
691 */
692 static void migrate(private_ike_auth_t *this, ike_sa_t *ike_sa)
693 {
694 chunk_free(&this->my_nonce);
695 chunk_free(&this->other_nonce);
696 DESTROY_IF(this->my_packet);
697 DESTROY_IF(this->other_packet);
698 if (this->eap_auth)
699 {
700 this->eap_auth->authenticator_interface.destroy(
701 &this->eap_auth->authenticator_interface);
702 }
703
704 this->my_packet = NULL;
705 this->other_packet = NULL;
706 this->peer_authenticated = FALSE;
707 this->eap_auth = NULL;
708 this->eap_payload = NULL;
709 this->ike_sa = ike_sa;
710 if (this->initiator)
711 {
712 this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
713 this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
714 }
715 else
716 {
717 this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
718 this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
719 }
720 }
721
722 /**
723 * Implementation of task_t.destroy
724 */
725 static void destroy(private_ike_auth_t *this)
726 {
727 chunk_free(&this->my_nonce);
728 chunk_free(&this->other_nonce);
729 DESTROY_IF(this->my_packet);
730 DESTROY_IF(this->other_packet);
731 if (this->eap_auth)
732 {
733 this->eap_auth->authenticator_interface.destroy(
734 &this->eap_auth->authenticator_interface);
735 }
736 free(this);
737 }
738
739 /*
740 * Described in header.
741 */
742 ike_auth_t *ike_auth_create(ike_sa_t *ike_sa, bool initiator)
743 {
744 private_ike_auth_t *this = malloc_thing(private_ike_auth_t);
745
746 this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
747 this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
748 this->public.task.destroy = (void(*)(task_t*))destroy;
749
750 if (initiator)
751 {
752 this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
753 this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
754 }
755 else
756 {
757 this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
758 this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
759 }
760
761 this->ike_sa = ike_sa;
762 this->initiator = initiator;
763 this->my_nonce = chunk_empty;
764 this->other_nonce = chunk_empty;
765 this->my_packet = NULL;
766 this->other_packet = NULL;
767 this->peer_authenticated = FALSE;
768 this->eap_auth = NULL;
769 this->eap_payload = NULL;
770
771 return &this->public;
772 }