MFC 1.45 for the 2.0 release: Properly set B_INVAL after failed read.
[dragonfly.git] / contrib / wpa_supplicant-0.5.8 / eap.c
bloba5cd9824fc62068c9b792ab7411eb371b8866e58
1 /*
2 * EAP peer state machines (RFC 4137)
3 * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
12 * See README and COPYING for more details.
14 * This file implements the Peer State Machine as defined in RFC 4137. The used
15 * states and state transitions match mostly with the RFC. However, there are
16 * couple of additional transitions for working around small issues noticed
17 * during testing. These exceptions are explained in comments within the
18 * functions in this file. The method functions, m.func(), are similar to the
19 * ones used in RFC 4137, but some small changes have used here to optimize
20 * operations and to add functionality needed for fast re-authentication
21 * (session resumption).
24 #include "includes.h"
26 #include "common.h"
27 #include "eap_i.h"
28 #include "config_ssid.h"
29 #include "tls.h"
30 #include "crypto.h"
31 #include "pcsc_funcs.h"
32 #include "wpa_ctrl.h"
33 #include "state_machine.h"
35 #define STATE_MACHINE_DATA struct eap_sm
36 #define STATE_MACHINE_DEBUG_PREFIX "EAP"
38 #define EAP_MAX_AUTH_ROUNDS 50
41 static Boolean eap_sm_allowMethod(struct eap_sm *sm, int vendor,
42 EapType method);
43 static u8 * eap_sm_buildNak(struct eap_sm *sm, int id, size_t *len);
44 static void eap_sm_processIdentity(struct eap_sm *sm, const u8 *req);
45 static void eap_sm_processNotify(struct eap_sm *sm, const u8 *req);
46 static u8 * eap_sm_buildNotify(int id, size_t *len);
47 static void eap_sm_parseEapReq(struct eap_sm *sm, const u8 *req, size_t len);
48 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
49 static const char * eap_sm_method_state_txt(EapMethodState state);
50 static const char * eap_sm_decision_txt(EapDecision decision);
51 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
55 static Boolean eapol_get_bool(struct eap_sm *sm, enum eapol_bool_var var)
57 return sm->eapol_cb->get_bool(sm->eapol_ctx, var);
61 static void eapol_set_bool(struct eap_sm *sm, enum eapol_bool_var var,
62 Boolean value)
64 sm->eapol_cb->set_bool(sm->eapol_ctx, var, value);
68 static unsigned int eapol_get_int(struct eap_sm *sm, enum eapol_int_var var)
70 return sm->eapol_cb->get_int(sm->eapol_ctx, var);
74 static void eapol_set_int(struct eap_sm *sm, enum eapol_int_var var,
75 unsigned int value)
77 sm->eapol_cb->set_int(sm->eapol_ctx, var, value);
81 static u8 * eapol_get_eapReqData(struct eap_sm *sm, size_t *len)
83 return sm->eapol_cb->get_eapReqData(sm->eapol_ctx, len);
87 static void eap_deinit_prev_method(struct eap_sm *sm, const char *txt)
89 if (sm->m == NULL || sm->eap_method_priv == NULL)
90 return;
92 wpa_printf(MSG_DEBUG, "EAP: deinitialize previously used EAP method "
93 "(%d, %s) at %s", sm->selectedMethod, sm->m->name, txt);
94 sm->m->deinit(sm, sm->eap_method_priv);
95 sm->eap_method_priv = NULL;
96 sm->m = NULL;
101 * This state initializes state machine variables when the machine is
102 * activated (portEnabled = TRUE). This is also used when re-starting
103 * authentication (eapRestart == TRUE).
105 SM_STATE(EAP, INITIALIZE)
107 SM_ENTRY(EAP, INITIALIZE);
108 if (sm->fast_reauth && sm->m && sm->m->has_reauth_data &&
109 sm->m->has_reauth_data(sm, sm->eap_method_priv)) {
110 wpa_printf(MSG_DEBUG, "EAP: maintaining EAP method data for "
111 "fast reauthentication");
112 sm->m->deinit_for_reauth(sm, sm->eap_method_priv);
113 } else {
114 eap_deinit_prev_method(sm, "INITIALIZE");
116 sm->selectedMethod = EAP_TYPE_NONE;
117 sm->methodState = METHOD_NONE;
118 sm->allowNotifications = TRUE;
119 sm->decision = DECISION_FAIL;
120 eapol_set_int(sm, EAPOL_idleWhile, sm->ClientTimeout);
121 eapol_set_bool(sm, EAPOL_eapSuccess, FALSE);
122 eapol_set_bool(sm, EAPOL_eapFail, FALSE);
123 os_free(sm->eapKeyData);
124 sm->eapKeyData = NULL;
125 sm->eapKeyAvailable = FALSE;
126 eapol_set_bool(sm, EAPOL_eapRestart, FALSE);
127 sm->lastId = -1; /* new session - make sure this does not match with
128 * the first EAP-Packet */
130 * RFC 4137 does not reset eapResp and eapNoResp here. However, this
131 * seemed to be able to trigger cases where both were set and if EAPOL
132 * state machine uses eapNoResp first, it may end up not sending a real
133 * reply correctly. This occurred when the workaround in FAIL state set
134 * eapNoResp = TRUE.. Maybe that workaround needs to be fixed to do
135 * something else(?)
137 eapol_set_bool(sm, EAPOL_eapResp, FALSE);
138 eapol_set_bool(sm, EAPOL_eapNoResp, FALSE);
139 sm->num_rounds = 0;
144 * This state is reached whenever service from the lower layer is interrupted
145 * or unavailable (portEnabled == FALSE). Immediate transition to INITIALIZE
146 * occurs when the port becomes enabled.
148 SM_STATE(EAP, DISABLED)
150 SM_ENTRY(EAP, DISABLED);
151 sm->num_rounds = 0;
156 * The state machine spends most of its time here, waiting for something to
157 * happen. This state is entered unconditionally from INITIALIZE, DISCARD, and
158 * SEND_RESPONSE states.
160 SM_STATE(EAP, IDLE)
162 SM_ENTRY(EAP, IDLE);
167 * This state is entered when an EAP packet is received (eapReq == TRUE) to
168 * parse the packet header.
170 SM_STATE(EAP, RECEIVED)
172 const u8 *eapReqData;
173 size_t eapReqDataLen;
175 SM_ENTRY(EAP, RECEIVED);
176 eapReqData = eapol_get_eapReqData(sm, &eapReqDataLen);
177 /* parse rxReq, rxSuccess, rxFailure, reqId, reqMethod */
178 eap_sm_parseEapReq(sm, eapReqData, eapReqDataLen);
179 sm->num_rounds++;
184 * This state is entered when a request for a new type comes in. Either the
185 * correct method is started, or a Nak response is built.
187 SM_STATE(EAP, GET_METHOD)
189 int reinit;
190 EapType method;
192 SM_ENTRY(EAP, GET_METHOD);
194 if (sm->reqMethod == EAP_TYPE_EXPANDED)
195 method = sm->reqVendorMethod;
196 else
197 method = sm->reqMethod;
199 if (!eap_sm_allowMethod(sm, sm->reqVendor, method)) {
200 wpa_printf(MSG_DEBUG, "EAP: vendor %u method %u not allowed",
201 sm->reqVendor, method);
202 goto nak;
206 * RFC 4137 does not define specific operation for fast
207 * re-authentication (session resumption). The design here is to allow
208 * the previously used method data to be maintained for
209 * re-authentication if the method support session resumption.
210 * Otherwise, the previously used method data is freed and a new method
211 * is allocated here.
213 if (sm->fast_reauth &&
214 sm->m && sm->m->vendor == sm->reqVendor &&
215 sm->m->method == method &&
216 sm->m->has_reauth_data &&
217 sm->m->has_reauth_data(sm, sm->eap_method_priv)) {
218 wpa_printf(MSG_DEBUG, "EAP: Using previous method data"
219 " for fast re-authentication");
220 reinit = 1;
221 } else {
222 eap_deinit_prev_method(sm, "GET_METHOD");
223 reinit = 0;
226 sm->selectedMethod = sm->reqMethod;
227 if (sm->m == NULL)
228 sm->m = eap_sm_get_eap_methods(sm->reqVendor, method);
229 if (!sm->m) {
230 wpa_printf(MSG_DEBUG, "EAP: Could not find selected method: "
231 "vendor %d method %d",
232 sm->reqVendor, method);
233 goto nak;
236 wpa_printf(MSG_DEBUG, "EAP: Initialize selected EAP method: "
237 "vendor %u method %u (%s)",
238 sm->reqVendor, method, sm->m->name);
239 if (reinit)
240 sm->eap_method_priv = sm->m->init_for_reauth(
241 sm, sm->eap_method_priv);
242 else
243 sm->eap_method_priv = sm->m->init(sm);
245 if (sm->eap_method_priv == NULL) {
246 struct wpa_ssid *config = eap_get_config(sm);
247 wpa_msg(sm->msg_ctx, MSG_INFO,
248 "EAP: Failed to initialize EAP method: vendor %u "
249 "method %u (%s)",
250 sm->reqVendor, method, sm->m->name);
251 sm->m = NULL;
252 sm->methodState = METHOD_NONE;
253 sm->selectedMethod = EAP_TYPE_NONE;
254 if (sm->reqMethod == EAP_TYPE_TLS && config &&
255 (config->pending_req_pin ||
256 config->pending_req_passphrase)) {
258 * Return without generating Nak in order to allow
259 * entering of PIN code or passphrase to retry the
260 * current EAP packet.
262 wpa_printf(MSG_DEBUG, "EAP: Pending PIN/passphrase "
263 "request - skip Nak");
264 return;
267 goto nak;
270 sm->methodState = METHOD_INIT;
271 wpa_msg(sm->msg_ctx, MSG_INFO, WPA_EVENT_EAP_METHOD
272 "EAP vendor %u method %u (%s) selected",
273 sm->reqVendor, method, sm->m->name);
274 return;
276 nak:
277 os_free(sm->eapRespData);
278 sm->eapRespData = NULL;
279 sm->eapRespData = eap_sm_buildNak(sm, sm->reqId, &sm->eapRespDataLen);
284 * The method processing happens here. The request from the authenticator is
285 * processed, and an appropriate response packet is built.
287 SM_STATE(EAP, METHOD)
289 u8 *eapReqData;
290 size_t eapReqDataLen;
291 struct eap_method_ret ret;
293 SM_ENTRY(EAP, METHOD);
294 if (sm->m == NULL) {
295 wpa_printf(MSG_WARNING, "EAP::METHOD - method not selected");
296 return;
299 eapReqData = eapol_get_eapReqData(sm, &eapReqDataLen);
302 * Get ignore, methodState, decision, allowNotifications, and
303 * eapRespData. RFC 4137 uses three separate method procedure (check,
304 * process, and buildResp) in this state. These have been combined into
305 * a single function call to m->process() in order to optimize EAP
306 * method implementation interface a bit. These procedures are only
307 * used from within this METHOD state, so there is no need to keep
308 * these as separate C functions.
310 * The RFC 4137 procedures return values as follows:
311 * ignore = m.check(eapReqData)
312 * (methodState, decision, allowNotifications) = m.process(eapReqData)
313 * eapRespData = m.buildResp(reqId)
315 os_memset(&ret, 0, sizeof(ret));
316 ret.ignore = sm->ignore;
317 ret.methodState = sm->methodState;
318 ret.decision = sm->decision;
319 ret.allowNotifications = sm->allowNotifications;
320 os_free(sm->eapRespData);
321 sm->eapRespData = NULL;
322 sm->eapRespData = sm->m->process(sm, sm->eap_method_priv, &ret,
323 eapReqData, eapReqDataLen,
324 &sm->eapRespDataLen);
325 wpa_printf(MSG_DEBUG, "EAP: method process -> ignore=%s "
326 "methodState=%s decision=%s",
327 ret.ignore ? "TRUE" : "FALSE",
328 eap_sm_method_state_txt(ret.methodState),
329 eap_sm_decision_txt(ret.decision));
331 sm->ignore = ret.ignore;
332 if (sm->ignore)
333 return;
334 sm->methodState = ret.methodState;
335 sm->decision = ret.decision;
336 sm->allowNotifications = ret.allowNotifications;
338 if (sm->m->isKeyAvailable && sm->m->getKey &&
339 sm->m->isKeyAvailable(sm, sm->eap_method_priv)) {
340 os_free(sm->eapKeyData);
341 sm->eapKeyData = sm->m->getKey(sm, sm->eap_method_priv,
342 &sm->eapKeyDataLen);
348 * This state signals the lower layer that a response packet is ready to be
349 * sent.
351 SM_STATE(EAP, SEND_RESPONSE)
353 SM_ENTRY(EAP, SEND_RESPONSE);
354 os_free(sm->lastRespData);
355 if (sm->eapRespData) {
356 if (sm->workaround)
357 os_memcpy(sm->last_md5, sm->req_md5, 16);
358 sm->lastId = sm->reqId;
359 sm->lastRespData = os_malloc(sm->eapRespDataLen);
360 if (sm->lastRespData) {
361 os_memcpy(sm->lastRespData, sm->eapRespData,
362 sm->eapRespDataLen);
363 sm->lastRespDataLen = sm->eapRespDataLen;
365 eapol_set_bool(sm, EAPOL_eapResp, TRUE);
366 } else
367 sm->lastRespData = NULL;
368 eapol_set_bool(sm, EAPOL_eapReq, FALSE);
369 eapol_set_int(sm, EAPOL_idleWhile, sm->ClientTimeout);
374 * This state signals the lower layer that the request was discarded, and no
375 * response packet will be sent at this time.
377 SM_STATE(EAP, DISCARD)
379 SM_ENTRY(EAP, DISCARD);
380 eapol_set_bool(sm, EAPOL_eapReq, FALSE);
381 eapol_set_bool(sm, EAPOL_eapNoResp, TRUE);
386 * Handles requests for Identity method and builds a response.
388 SM_STATE(EAP, IDENTITY)
390 const u8 *eapReqData;
391 size_t eapReqDataLen;
393 SM_ENTRY(EAP, IDENTITY);
394 eapReqData = eapol_get_eapReqData(sm, &eapReqDataLen);
395 eap_sm_processIdentity(sm, eapReqData);
396 os_free(sm->eapRespData);
397 sm->eapRespData = NULL;
398 sm->eapRespData = eap_sm_buildIdentity(sm, sm->reqId,
399 &sm->eapRespDataLen, 0);
404 * Handles requests for Notification method and builds a response.
406 SM_STATE(EAP, NOTIFICATION)
408 const u8 *eapReqData;
409 size_t eapReqDataLen;
411 SM_ENTRY(EAP, NOTIFICATION);
412 eapReqData = eapol_get_eapReqData(sm, &eapReqDataLen);
413 eap_sm_processNotify(sm, eapReqData);
414 os_free(sm->eapRespData);
415 sm->eapRespData = NULL;
416 sm->eapRespData = eap_sm_buildNotify(sm->reqId, &sm->eapRespDataLen);
421 * This state retransmits the previous response packet.
423 SM_STATE(EAP, RETRANSMIT)
425 SM_ENTRY(EAP, RETRANSMIT);
426 os_free(sm->eapRespData);
427 if (sm->lastRespData) {
428 sm->eapRespData = os_malloc(sm->lastRespDataLen);
429 if (sm->eapRespData) {
430 os_memcpy(sm->eapRespData, sm->lastRespData,
431 sm->lastRespDataLen);
432 sm->eapRespDataLen = sm->lastRespDataLen;
434 } else
435 sm->eapRespData = NULL;
440 * This state is entered in case of a successful completion of authentication
441 * and state machine waits here until port is disabled or EAP authentication is
442 * restarted.
444 SM_STATE(EAP, SUCCESS)
446 SM_ENTRY(EAP, SUCCESS);
447 if (sm->eapKeyData != NULL)
448 sm->eapKeyAvailable = TRUE;
449 eapol_set_bool(sm, EAPOL_eapSuccess, TRUE);
452 * RFC 4137 does not clear eapReq here, but this seems to be required
453 * to avoid processing the same request twice when state machine is
454 * initialized.
456 eapol_set_bool(sm, EAPOL_eapReq, FALSE);
459 * RFC 4137 does not set eapNoResp here, but this seems to be required
460 * to get EAPOL Supplicant backend state machine into SUCCESS state. In
461 * addition, either eapResp or eapNoResp is required to be set after
462 * processing the received EAP frame.
464 eapol_set_bool(sm, EAPOL_eapNoResp, TRUE);
466 wpa_msg(sm->msg_ctx, MSG_INFO, WPA_EVENT_EAP_SUCCESS
467 "EAP authentication completed successfully");
472 * This state is entered in case of a failure and state machine waits here
473 * until port is disabled or EAP authentication is restarted.
475 SM_STATE(EAP, FAILURE)
477 SM_ENTRY(EAP, FAILURE);
478 eapol_set_bool(sm, EAPOL_eapFail, TRUE);
481 * RFC 4137 does not clear eapReq here, but this seems to be required
482 * to avoid processing the same request twice when state machine is
483 * initialized.
485 eapol_set_bool(sm, EAPOL_eapReq, FALSE);
488 * RFC 4137 does not set eapNoResp here. However, either eapResp or
489 * eapNoResp is required to be set after processing the received EAP
490 * frame.
492 eapol_set_bool(sm, EAPOL_eapNoResp, TRUE);
494 wpa_msg(sm->msg_ctx, MSG_INFO, WPA_EVENT_EAP_FAILURE
495 "EAP authentication failed");
499 static int eap_success_workaround(struct eap_sm *sm, int reqId, int lastId)
502 * At least Microsoft IAS and Meetinghouse Aegis seem to be sending
503 * EAP-Success/Failure with lastId + 1 even though RFC 3748 and
504 * RFC 4137 require that reqId == lastId. In addition, it looks like
505 * Ringmaster v2.1.2.0 would be using lastId + 2 in EAP-Success.
507 * Accept this kind of Id if EAP workarounds are enabled. These are
508 * unauthenticated plaintext messages, so this should have minimal
509 * security implications (bit easier to fake EAP-Success/Failure).
511 if (sm->workaround && (reqId == ((lastId + 1) & 0xff) ||
512 reqId == ((lastId + 2) & 0xff))) {
513 wpa_printf(MSG_DEBUG, "EAP: Workaround for unexpected "
514 "identifier field in EAP Success: "
515 "reqId=%d lastId=%d (these are supposed to be "
516 "same)", reqId, lastId);
517 return 1;
519 wpa_printf(MSG_DEBUG, "EAP: EAP-Success Id mismatch - reqId=%d "
520 "lastId=%d", reqId, lastId);
521 return 0;
526 * RFC 4137 - Appendix A.1: EAP Peer State Machine - State transitions
528 SM_STEP(EAP)
530 int duplicate;
532 if (eapol_get_bool(sm, EAPOL_eapRestart) &&
533 eapol_get_bool(sm, EAPOL_portEnabled))
534 SM_ENTER_GLOBAL(EAP, INITIALIZE);
535 else if (!eapol_get_bool(sm, EAPOL_portEnabled) || sm->force_disabled)
536 SM_ENTER_GLOBAL(EAP, DISABLED);
537 else if (sm->num_rounds > EAP_MAX_AUTH_ROUNDS) {
538 /* RFC 4137 does not place any limit on number of EAP messages
539 * in an authentication session. However, some error cases have
540 * ended up in a state were EAP messages were sent between the
541 * peer and server in a loop (e.g., TLS ACK frame in both
542 * direction). Since this is quite undesired outcome, limit the
543 * total number of EAP round-trips and abort authentication if
544 * this limit is exceeded.
546 if (sm->num_rounds == EAP_MAX_AUTH_ROUNDS + 1) {
547 wpa_msg(sm->msg_ctx, MSG_INFO, "EAP: more than %d "
548 "authentication rounds - abort",
549 EAP_MAX_AUTH_ROUNDS);
550 sm->num_rounds++;
551 SM_ENTER_GLOBAL(EAP, FAILURE);
553 } else switch (sm->EAP_state) {
554 case EAP_INITIALIZE:
555 SM_ENTER(EAP, IDLE);
556 break;
557 case EAP_DISABLED:
558 if (eapol_get_bool(sm, EAPOL_portEnabled) &&
559 !sm->force_disabled)
560 SM_ENTER(EAP, INITIALIZE);
561 break;
562 case EAP_IDLE:
564 * The first three transitions are from RFC 4137. The last two
565 * are local additions to handle special cases with LEAP and
566 * PEAP server not sending EAP-Success in some cases.
568 if (eapol_get_bool(sm, EAPOL_eapReq))
569 SM_ENTER(EAP, RECEIVED);
570 else if ((eapol_get_bool(sm, EAPOL_altAccept) &&
571 sm->decision != DECISION_FAIL) ||
572 (eapol_get_int(sm, EAPOL_idleWhile) == 0 &&
573 sm->decision == DECISION_UNCOND_SUCC))
574 SM_ENTER(EAP, SUCCESS);
575 else if (eapol_get_bool(sm, EAPOL_altReject) ||
576 (eapol_get_int(sm, EAPOL_idleWhile) == 0 &&
577 sm->decision != DECISION_UNCOND_SUCC) ||
578 (eapol_get_bool(sm, EAPOL_altAccept) &&
579 sm->methodState != METHOD_CONT &&
580 sm->decision == DECISION_FAIL))
581 SM_ENTER(EAP, FAILURE);
582 else if (sm->selectedMethod == EAP_TYPE_LEAP &&
583 sm->leap_done && sm->decision != DECISION_FAIL &&
584 sm->methodState == METHOD_DONE)
585 SM_ENTER(EAP, SUCCESS);
586 else if (sm->selectedMethod == EAP_TYPE_PEAP &&
587 sm->peap_done && sm->decision != DECISION_FAIL &&
588 sm->methodState == METHOD_DONE)
589 SM_ENTER(EAP, SUCCESS);
590 break;
591 case EAP_RECEIVED:
592 duplicate = (sm->reqId == sm->lastId) && sm->rxReq;
593 if (sm->workaround && duplicate &&
594 os_memcmp(sm->req_md5, sm->last_md5, 16) != 0) {
596 * RFC 4137 uses (reqId == lastId) as the only
597 * verification for duplicate EAP requests. However,
598 * this misses cases where the AS is incorrectly using
599 * the same id again; and unfortunately, such
600 * implementations exist. Use MD5 hash as an extra
601 * verification for the packets being duplicate to
602 * workaround these issues.
604 wpa_printf(MSG_DEBUG, "EAP: AS used the same Id again,"
605 " but EAP packets were not identical");
606 wpa_printf(MSG_DEBUG, "EAP: workaround - assume this "
607 "is not a duplicate packet");
608 duplicate = 0;
612 * Two special cases below for LEAP are local additions to work
613 * around odd LEAP behavior (EAP-Success in the middle of
614 * authentication and then swapped roles). Other transitions
615 * are based on RFC 4137.
617 if (sm->rxSuccess && sm->decision != DECISION_FAIL &&
618 (sm->reqId == sm->lastId ||
619 eap_success_workaround(sm, sm->reqId, sm->lastId)))
620 SM_ENTER(EAP, SUCCESS);
621 else if (sm->methodState != METHOD_CONT &&
622 ((sm->rxFailure &&
623 sm->decision != DECISION_UNCOND_SUCC) ||
624 (sm->rxSuccess && sm->decision == DECISION_FAIL &&
625 (sm->selectedMethod != EAP_TYPE_LEAP ||
626 sm->methodState != METHOD_MAY_CONT))) &&
627 (sm->reqId == sm->lastId ||
628 eap_success_workaround(sm, sm->reqId, sm->lastId)))
629 SM_ENTER(EAP, FAILURE);
630 else if (sm->rxReq && duplicate)
631 SM_ENTER(EAP, RETRANSMIT);
632 else if (sm->rxReq && !duplicate &&
633 sm->reqMethod == EAP_TYPE_NOTIFICATION &&
634 sm->allowNotifications)
635 SM_ENTER(EAP, NOTIFICATION);
636 else if (sm->rxReq && !duplicate &&
637 sm->selectedMethod == EAP_TYPE_NONE &&
638 sm->reqMethod == EAP_TYPE_IDENTITY)
639 SM_ENTER(EAP, IDENTITY);
640 else if (sm->rxReq && !duplicate &&
641 sm->selectedMethod == EAP_TYPE_NONE &&
642 sm->reqMethod != EAP_TYPE_IDENTITY &&
643 sm->reqMethod != EAP_TYPE_NOTIFICATION)
644 SM_ENTER(EAP, GET_METHOD);
645 else if (sm->rxReq && !duplicate &&
646 sm->reqMethod == sm->selectedMethod &&
647 sm->methodState != METHOD_DONE)
648 SM_ENTER(EAP, METHOD);
649 else if (sm->selectedMethod == EAP_TYPE_LEAP &&
650 (sm->rxSuccess || sm->rxResp))
651 SM_ENTER(EAP, METHOD);
652 else
653 SM_ENTER(EAP, DISCARD);
654 break;
655 case EAP_GET_METHOD:
656 if (sm->selectedMethod == sm->reqMethod)
657 SM_ENTER(EAP, METHOD);
658 else
659 SM_ENTER(EAP, SEND_RESPONSE);
660 break;
661 case EAP_METHOD:
662 if (sm->ignore)
663 SM_ENTER(EAP, DISCARD);
664 else
665 SM_ENTER(EAP, SEND_RESPONSE);
666 break;
667 case EAP_SEND_RESPONSE:
668 SM_ENTER(EAP, IDLE);
669 break;
670 case EAP_DISCARD:
671 SM_ENTER(EAP, IDLE);
672 break;
673 case EAP_IDENTITY:
674 SM_ENTER(EAP, SEND_RESPONSE);
675 break;
676 case EAP_NOTIFICATION:
677 SM_ENTER(EAP, SEND_RESPONSE);
678 break;
679 case EAP_RETRANSMIT:
680 SM_ENTER(EAP, SEND_RESPONSE);
681 break;
682 case EAP_SUCCESS:
683 break;
684 case EAP_FAILURE:
685 break;
690 static Boolean eap_sm_allowMethod(struct eap_sm *sm, int vendor,
691 EapType method)
693 struct wpa_ssid *config = eap_get_config(sm);
695 if (!wpa_config_allowed_eap_method(config, vendor, method)) {
696 wpa_printf(MSG_DEBUG, "EAP: configuration does not allow: "
697 "vendor %u method %u", vendor, method);
698 return FALSE;
700 if (eap_sm_get_eap_methods(vendor, method))
701 return TRUE;
702 wpa_printf(MSG_DEBUG, "EAP: not included in build: "
703 "vendor %u method %u", vendor, method);
704 return FALSE;
708 static u8 * eap_sm_build_expanded_nak(struct eap_sm *sm, int id, size_t *len,
709 const struct eap_method *methods,
710 size_t count)
712 struct wpa_ssid *config = eap_get_config(sm);
713 struct eap_hdr *resp;
714 u8 *pos;
715 int found = 0;
716 const struct eap_method *m;
718 wpa_printf(MSG_DEBUG, "EAP: Building expanded EAP-Nak");
720 /* RFC 3748 - 5.3.2: Expanded Nak */
721 *len = sizeof(struct eap_hdr) + 8;
722 resp = os_malloc(*len + 8 * (count + 1));
723 if (resp == NULL)
724 return NULL;
726 resp->code = EAP_CODE_RESPONSE;
727 resp->identifier = id;
728 pos = (u8 *) (resp + 1);
729 *pos++ = EAP_TYPE_EXPANDED;
730 WPA_PUT_BE24(pos, EAP_VENDOR_IETF);
731 pos += 3;
732 WPA_PUT_BE32(pos, EAP_TYPE_NAK);
733 pos += 4;
735 for (m = methods; m; m = m->next) {
736 if (sm->reqVendor == m->vendor &&
737 sm->reqVendorMethod == m->method)
738 continue; /* do not allow the current method again */
739 if (wpa_config_allowed_eap_method(config, m->vendor,
740 m->method)) {
741 wpa_printf(MSG_DEBUG, "EAP: allowed type: "
742 "vendor=%u method=%u",
743 m->vendor, m->method);
744 *pos++ = EAP_TYPE_EXPANDED;
745 WPA_PUT_BE24(pos, m->vendor);
746 pos += 3;
747 WPA_PUT_BE32(pos, m->method);
748 pos += 4;
750 (*len) += 8;
751 found++;
754 if (!found) {
755 wpa_printf(MSG_DEBUG, "EAP: no more allowed methods");
756 *pos++ = EAP_TYPE_EXPANDED;
757 WPA_PUT_BE24(pos, EAP_VENDOR_IETF);
758 pos += 3;
759 WPA_PUT_BE32(pos, EAP_TYPE_NONE);
760 pos += 4;
762 (*len) += 8;
765 resp->length = host_to_be16(*len);
767 return (u8 *) resp;
771 static u8 * eap_sm_buildNak(struct eap_sm *sm, int id, size_t *len)
773 struct wpa_ssid *config = eap_get_config(sm);
774 struct eap_hdr *resp;
775 u8 *pos;
776 int found = 0, expanded_found = 0;
777 size_t count;
778 const struct eap_method *methods, *m;
780 wpa_printf(MSG_DEBUG, "EAP: Building EAP-Nak (requested type %u "
781 "vendor=%u method=%u not allowed)", sm->reqMethod,
782 sm->reqVendor, sm->reqVendorMethod);
783 methods = eap_peer_get_methods(&count);
784 if (methods == NULL)
785 return NULL;
786 if (sm->reqMethod == EAP_TYPE_EXPANDED)
787 return eap_sm_build_expanded_nak(sm, id, len, methods, count);
789 /* RFC 3748 - 5.3.1: Legacy Nak */
790 *len = sizeof(struct eap_hdr) + 1;
791 resp = os_malloc(*len + count + 1);
792 if (resp == NULL)
793 return NULL;
795 resp->code = EAP_CODE_RESPONSE;
796 resp->identifier = id;
797 pos = (u8 *) (resp + 1);
798 *pos++ = EAP_TYPE_NAK;
800 for (m = methods; m; m = m->next) {
801 if (m->vendor == EAP_VENDOR_IETF && m->method == sm->reqMethod)
802 continue; /* do not allow the current method again */
803 if (wpa_config_allowed_eap_method(config, m->vendor,
804 m->method)) {
805 if (m->vendor != EAP_VENDOR_IETF) {
806 if (expanded_found)
807 continue;
808 expanded_found = 1;
809 *pos++ = EAP_TYPE_EXPANDED;
810 } else
811 *pos++ = m->method;
812 (*len)++;
813 found++;
816 if (!found) {
817 *pos = EAP_TYPE_NONE;
818 (*len)++;
820 wpa_hexdump(MSG_DEBUG, "EAP: allowed methods",
821 ((u8 *) (resp + 1)) + 1, found);
823 resp->length = host_to_be16(*len);
825 return (u8 *) resp;
829 static void eap_sm_processIdentity(struct eap_sm *sm, const u8 *req)
831 const struct eap_hdr *hdr = (const struct eap_hdr *) req;
832 const u8 *pos = (const u8 *) (hdr + 1);
833 pos++;
835 wpa_msg(sm->msg_ctx, MSG_INFO, WPA_EVENT_EAP_STARTED
836 "EAP authentication started");
839 * RFC 3748 - 5.1: Identity
840 * Data field may contain a displayable message in UTF-8. If this
841 * includes NUL-character, only the data before that should be
842 * displayed. Some EAP implementasitons may piggy-back additional
843 * options after the NUL.
845 /* TODO: could save displayable message so that it can be shown to the
846 * user in case of interaction is required */
847 wpa_hexdump_ascii(MSG_DEBUG, "EAP: EAP-Request Identity data",
848 pos, be_to_host16(hdr->length) - 5);
852 #ifdef PCSC_FUNCS
853 static int eap_sm_imsi_identity(struct eap_sm *sm, struct wpa_ssid *ssid)
855 int aka = 0;
856 char imsi[100];
857 size_t imsi_len;
858 struct eap_method_type *m = ssid->eap_methods;
859 int i;
861 imsi_len = sizeof(imsi);
862 if (scard_get_imsi(sm->scard_ctx, imsi, &imsi_len)) {
863 wpa_printf(MSG_WARNING, "Failed to get IMSI from SIM");
864 return -1;
867 wpa_hexdump_ascii(MSG_DEBUG, "IMSI", (u8 *) imsi, imsi_len);
869 for (i = 0; m && (m[i].vendor != EAP_VENDOR_IETF ||
870 m[i].method != EAP_TYPE_NONE); i++) {
871 if (m[i].vendor == EAP_VENDOR_IETF &&
872 m[i].method == EAP_TYPE_AKA) {
873 aka = 1;
874 break;
878 os_free(ssid->identity);
879 ssid->identity = os_malloc(1 + imsi_len);
880 if (ssid->identity == NULL) {
881 wpa_printf(MSG_WARNING, "Failed to allocate buffer for "
882 "IMSI-based identity");
883 return -1;
886 ssid->identity[0] = aka ? '0' : '1';
887 os_memcpy(ssid->identity + 1, imsi, imsi_len);
888 ssid->identity_len = 1 + imsi_len;
890 return 0;
892 #endif /* PCSC_FUNCS */
895 static int eap_sm_get_scard_identity(struct eap_sm *sm, struct wpa_ssid *ssid)
897 #ifdef PCSC_FUNCS
898 if (scard_set_pin(sm->scard_ctx, ssid->pin)) {
900 * Make sure the same PIN is not tried again in order to avoid
901 * blocking SIM.
903 os_free(ssid->pin);
904 ssid->pin = NULL;
906 wpa_printf(MSG_WARNING, "PIN validation failed");
907 eap_sm_request_pin(sm);
908 return -1;
911 return eap_sm_imsi_identity(sm, ssid);
912 #else /* PCSC_FUNCS */
913 return -1;
914 #endif /* PCSC_FUNCS */
919 * eap_sm_buildIdentity - Build EAP-Identity/Response for the current network
920 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
921 * @id: EAP identifier for the packet
922 * @len: Pointer to a variable that will be set to the length of the response
923 * @encrypted: Whether the packet is for encrypted tunnel (EAP phase 2)
924 * Returns: Pointer to the allocated EAP-Identity/Response packet or %NULL on
925 * failure
927 * This function allocates and builds an EAP-Identity/Response packet for the
928 * current network. The caller is responsible for freeing the returned data.
930 u8 * eap_sm_buildIdentity(struct eap_sm *sm, int id, size_t *len,
931 int encrypted)
933 struct wpa_ssid *config = eap_get_config(sm);
934 struct eap_hdr *resp;
935 u8 *pos;
936 const u8 *identity;
937 size_t identity_len;
939 if (config == NULL) {
940 wpa_printf(MSG_WARNING, "EAP: buildIdentity: configuration "
941 "was not available");
942 return NULL;
945 if (sm->m && sm->m->get_identity &&
946 (identity = sm->m->get_identity(sm, sm->eap_method_priv,
947 &identity_len)) != NULL) {
948 wpa_hexdump_ascii(MSG_DEBUG, "EAP: using method re-auth "
949 "identity", identity, identity_len);
950 } else if (!encrypted && config->anonymous_identity) {
951 identity = config->anonymous_identity;
952 identity_len = config->anonymous_identity_len;
953 wpa_hexdump_ascii(MSG_DEBUG, "EAP: using anonymous identity",
954 identity, identity_len);
955 } else {
956 identity = config->identity;
957 identity_len = config->identity_len;
958 wpa_hexdump_ascii(MSG_DEBUG, "EAP: using real identity",
959 identity, identity_len);
962 if (identity == NULL) {
963 wpa_printf(MSG_WARNING, "EAP: buildIdentity: identity "
964 "configuration was not available");
965 if (config->pcsc) {
966 if (eap_sm_get_scard_identity(sm, config) < 0)
967 return NULL;
968 identity = config->identity;
969 identity_len = config->identity_len;
970 wpa_hexdump_ascii(MSG_DEBUG, "permanent identity from "
971 "IMSI", identity, identity_len);
972 } else {
973 eap_sm_request_identity(sm);
974 return NULL;
978 *len = sizeof(struct eap_hdr) + 1 + identity_len;
979 resp = os_malloc(*len);
980 if (resp == NULL)
981 return NULL;
983 resp->code = EAP_CODE_RESPONSE;
984 resp->identifier = id;
985 resp->length = host_to_be16(*len);
986 pos = (u8 *) (resp + 1);
987 *pos++ = EAP_TYPE_IDENTITY;
988 os_memcpy(pos, identity, identity_len);
990 return (u8 *) resp;
994 static void eap_sm_processNotify(struct eap_sm *sm, const u8 *req)
996 const struct eap_hdr *hdr = (const struct eap_hdr *) req;
997 const u8 *pos;
998 char *msg;
999 size_t i, msg_len;
1001 pos = (const u8 *) (hdr + 1);
1002 pos++;
1004 msg_len = be_to_host16(hdr->length);
1005 if (msg_len < 5)
1006 return;
1007 msg_len -= 5;
1008 wpa_hexdump_ascii(MSG_DEBUG, "EAP: EAP-Request Notification data",
1009 pos, msg_len);
1011 msg = os_malloc(msg_len + 1);
1012 if (msg == NULL)
1013 return;
1014 for (i = 0; i < msg_len; i++)
1015 msg[i] = isprint(pos[i]) ? (char) pos[i] : '_';
1016 msg[msg_len] = '\0';
1017 wpa_msg(sm->msg_ctx, MSG_INFO, "%s%s",
1018 WPA_EVENT_EAP_NOTIFICATION, msg);
1019 os_free(msg);
1023 static u8 * eap_sm_buildNotify(int id, size_t *len)
1025 struct eap_hdr *resp;
1026 u8 *pos;
1028 wpa_printf(MSG_DEBUG, "EAP: Generating EAP-Response Notification");
1029 *len = sizeof(struct eap_hdr) + 1;
1030 resp = os_malloc(*len);
1031 if (resp == NULL)
1032 return NULL;
1034 resp->code = EAP_CODE_RESPONSE;
1035 resp->identifier = id;
1036 resp->length = host_to_be16(*len);
1037 pos = (u8 *) (resp + 1);
1038 *pos = EAP_TYPE_NOTIFICATION;
1040 return (u8 *) resp;
1044 static void eap_sm_parseEapReq(struct eap_sm *sm, const u8 *req, size_t len)
1046 const struct eap_hdr *hdr;
1047 size_t plen;
1048 const u8 *pos;
1050 sm->rxReq = sm->rxResp = sm->rxSuccess = sm->rxFailure = FALSE;
1051 sm->reqId = 0;
1052 sm->reqMethod = EAP_TYPE_NONE;
1053 sm->reqVendor = EAP_VENDOR_IETF;
1054 sm->reqVendorMethod = EAP_TYPE_NONE;
1056 if (req == NULL || len < sizeof(*hdr))
1057 return;
1059 hdr = (const struct eap_hdr *) req;
1060 plen = be_to_host16(hdr->length);
1061 if (plen > len) {
1062 wpa_printf(MSG_DEBUG, "EAP: Ignored truncated EAP-Packet "
1063 "(len=%lu plen=%lu)",
1064 (unsigned long) len, (unsigned long) plen);
1065 return;
1068 sm->reqId = hdr->identifier;
1070 if (sm->workaround) {
1071 md5_vector(1, (const u8 **) &req, &plen, sm->req_md5);
1074 switch (hdr->code) {
1075 case EAP_CODE_REQUEST:
1076 if (plen < sizeof(*hdr) + 1) {
1077 wpa_printf(MSG_DEBUG, "EAP: Too short EAP-Request - "
1078 "no Type field");
1079 return;
1081 sm->rxReq = TRUE;
1082 pos = (const u8 *) (hdr + 1);
1083 sm->reqMethod = *pos++;
1084 if (sm->reqMethod == EAP_TYPE_EXPANDED) {
1085 if (plen < sizeof(*hdr) + 8) {
1086 wpa_printf(MSG_DEBUG, "EAP: Ignored truncated "
1087 "expanded EAP-Packet (plen=%lu)",
1088 (unsigned long) plen);
1089 return;
1091 sm->reqVendor = WPA_GET_BE24(pos);
1092 pos += 3;
1093 sm->reqVendorMethod = WPA_GET_BE32(pos);
1095 wpa_printf(MSG_DEBUG, "EAP: Received EAP-Request id=%d "
1096 "method=%u vendor=%u vendorMethod=%u",
1097 sm->reqId, sm->reqMethod, sm->reqVendor,
1098 sm->reqVendorMethod);
1099 break;
1100 case EAP_CODE_RESPONSE:
1101 if (sm->selectedMethod == EAP_TYPE_LEAP) {
1103 * LEAP differs from RFC 4137 by using reversed roles
1104 * for mutual authentication and because of this, we
1105 * need to accept EAP-Response frames if LEAP is used.
1107 if (plen < sizeof(*hdr) + 1) {
1108 wpa_printf(MSG_DEBUG, "EAP: Too short "
1109 "EAP-Response - no Type field");
1110 return;
1112 sm->rxResp = TRUE;
1113 pos = (const u8 *) (hdr + 1);
1114 sm->reqMethod = *pos;
1115 wpa_printf(MSG_DEBUG, "EAP: Received EAP-Response for "
1116 "LEAP method=%d id=%d",
1117 sm->reqMethod, sm->reqId);
1118 break;
1120 wpa_printf(MSG_DEBUG, "EAP: Ignored EAP-Response");
1121 break;
1122 case EAP_CODE_SUCCESS:
1123 wpa_printf(MSG_DEBUG, "EAP: Received EAP-Success");
1124 sm->rxSuccess = TRUE;
1125 break;
1126 case EAP_CODE_FAILURE:
1127 wpa_printf(MSG_DEBUG, "EAP: Received EAP-Failure");
1128 sm->rxFailure = TRUE;
1129 break;
1130 default:
1131 wpa_printf(MSG_DEBUG, "EAP: Ignored EAP-Packet with unknown "
1132 "code %d", hdr->code);
1133 break;
1139 * eap_sm_init - Allocate and initialize EAP state machine
1140 * @eapol_ctx: Context data to be used with eapol_cb calls
1141 * @eapol_cb: Pointer to EAPOL callback functions
1142 * @msg_ctx: Context data for wpa_msg() calls
1143 * @conf: EAP configuration
1144 * Returns: Pointer to the allocated EAP state machine or %NULL on failure
1146 * This function allocates and initializes an EAP state machine. In addition,
1147 * this initializes TLS library for the new EAP state machine. eapol_cb pointer
1148 * will be in use until eap_sm_deinit() is used to deinitialize this EAP state
1149 * machine. Consequently, the caller must make sure that this data structure
1150 * remains alive while the EAP state machine is active.
1152 struct eap_sm * eap_sm_init(void *eapol_ctx, struct eapol_callbacks *eapol_cb,
1153 void *msg_ctx, struct eap_config *conf)
1155 struct eap_sm *sm;
1156 struct tls_config tlsconf;
1158 sm = os_zalloc(sizeof(*sm));
1159 if (sm == NULL)
1160 return NULL;
1161 sm->eapol_ctx = eapol_ctx;
1162 sm->eapol_cb = eapol_cb;
1163 sm->msg_ctx = msg_ctx;
1164 sm->ClientTimeout = 60;
1166 os_memset(&tlsconf, 0, sizeof(tlsconf));
1167 tlsconf.opensc_engine_path = conf->opensc_engine_path;
1168 tlsconf.pkcs11_engine_path = conf->pkcs11_engine_path;
1169 tlsconf.pkcs11_module_path = conf->pkcs11_module_path;
1170 sm->ssl_ctx = tls_init(&tlsconf);
1171 if (sm->ssl_ctx == NULL) {
1172 wpa_printf(MSG_WARNING, "SSL: Failed to initialize TLS "
1173 "context.");
1174 os_free(sm);
1175 return NULL;
1178 return sm;
1183 * eap_sm_deinit - Deinitialize and free an EAP state machine
1184 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1186 * This function deinitializes EAP state machine and frees all allocated
1187 * resources.
1189 void eap_sm_deinit(struct eap_sm *sm)
1191 if (sm == NULL)
1192 return;
1193 eap_deinit_prev_method(sm, "EAP deinit");
1194 eap_sm_abort(sm);
1195 tls_deinit(sm->ssl_ctx);
1196 os_free(sm);
1201 * eap_sm_step - Step EAP state machine
1202 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1203 * Returns: 1 if EAP state was changed or 0 if not
1205 * This function advances EAP state machine to a new state to match with the
1206 * current variables. This should be called whenever variables used by the EAP
1207 * state machine have changed.
1209 int eap_sm_step(struct eap_sm *sm)
1211 int res = 0;
1212 do {
1213 sm->changed = FALSE;
1214 SM_STEP_RUN(EAP);
1215 if (sm->changed)
1216 res = 1;
1217 } while (sm->changed);
1218 return res;
1223 * eap_sm_abort - Abort EAP authentication
1224 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1226 * Release system resources that have been allocated for the authentication
1227 * session without fully deinitializing the EAP state machine.
1229 void eap_sm_abort(struct eap_sm *sm)
1231 os_free(sm->lastRespData);
1232 sm->lastRespData = NULL;
1233 os_free(sm->eapRespData);
1234 sm->eapRespData = NULL;
1235 os_free(sm->eapKeyData);
1236 sm->eapKeyData = NULL;
1238 /* This is not clearly specified in the EAP statemachines draft, but
1239 * it seems necessary to make sure that some of the EAPOL variables get
1240 * cleared for the next authentication. */
1241 eapol_set_bool(sm, EAPOL_eapSuccess, FALSE);
1245 #ifdef CONFIG_CTRL_IFACE
1246 static const char * eap_sm_state_txt(int state)
1248 switch (state) {
1249 case EAP_INITIALIZE:
1250 return "INITIALIZE";
1251 case EAP_DISABLED:
1252 return "DISABLED";
1253 case EAP_IDLE:
1254 return "IDLE";
1255 case EAP_RECEIVED:
1256 return "RECEIVED";
1257 case EAP_GET_METHOD:
1258 return "GET_METHOD";
1259 case EAP_METHOD:
1260 return "METHOD";
1261 case EAP_SEND_RESPONSE:
1262 return "SEND_RESPONSE";
1263 case EAP_DISCARD:
1264 return "DISCARD";
1265 case EAP_IDENTITY:
1266 return "IDENTITY";
1267 case EAP_NOTIFICATION:
1268 return "NOTIFICATION";
1269 case EAP_RETRANSMIT:
1270 return "RETRANSMIT";
1271 case EAP_SUCCESS:
1272 return "SUCCESS";
1273 case EAP_FAILURE:
1274 return "FAILURE";
1275 default:
1276 return "UNKNOWN";
1279 #endif /* CONFIG_CTRL_IFACE */
1282 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
1283 static const char * eap_sm_method_state_txt(EapMethodState state)
1285 switch (state) {
1286 case METHOD_NONE:
1287 return "NONE";
1288 case METHOD_INIT:
1289 return "INIT";
1290 case METHOD_CONT:
1291 return "CONT";
1292 case METHOD_MAY_CONT:
1293 return "MAY_CONT";
1294 case METHOD_DONE:
1295 return "DONE";
1296 default:
1297 return "UNKNOWN";
1302 static const char * eap_sm_decision_txt(EapDecision decision)
1304 switch (decision) {
1305 case DECISION_FAIL:
1306 return "FAIL";
1307 case DECISION_COND_SUCC:
1308 return "COND_SUCC";
1309 case DECISION_UNCOND_SUCC:
1310 return "UNCOND_SUCC";
1311 default:
1312 return "UNKNOWN";
1315 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
1318 #ifdef CONFIG_CTRL_IFACE
1321 * eap_sm_get_status - Get EAP state machine status
1322 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1323 * @buf: Buffer for status information
1324 * @buflen: Maximum buffer length
1325 * @verbose: Whether to include verbose status information
1326 * Returns: Number of bytes written to buf.
1328 * Query EAP state machine for status information. This function fills in a
1329 * text area with current status information from the EAPOL state machine. If
1330 * the buffer (buf) is not large enough, status information will be truncated
1331 * to fit the buffer.
1333 int eap_sm_get_status(struct eap_sm *sm, char *buf, size_t buflen, int verbose)
1335 int len, ret;
1337 if (sm == NULL)
1338 return 0;
1340 len = os_snprintf(buf, buflen,
1341 "EAP state=%s\n",
1342 eap_sm_state_txt(sm->EAP_state));
1343 if (len < 0 || (size_t) len >= buflen)
1344 return 0;
1346 if (sm->selectedMethod != EAP_TYPE_NONE) {
1347 const char *name;
1348 if (sm->m) {
1349 name = sm->m->name;
1350 } else {
1351 const struct eap_method *m =
1352 eap_sm_get_eap_methods(EAP_VENDOR_IETF,
1353 sm->selectedMethod);
1354 if (m)
1355 name = m->name;
1356 else
1357 name = "?";
1359 ret = os_snprintf(buf + len, buflen - len,
1360 "selectedMethod=%d (EAP-%s)\n",
1361 sm->selectedMethod, name);
1362 if (ret < 0 || (size_t) ret >= buflen - len)
1363 return len;
1364 len += ret;
1366 if (sm->m && sm->m->get_status) {
1367 len += sm->m->get_status(sm, sm->eap_method_priv,
1368 buf + len, buflen - len,
1369 verbose);
1373 if (verbose) {
1374 ret = os_snprintf(buf + len, buflen - len,
1375 "reqMethod=%d\n"
1376 "methodState=%s\n"
1377 "decision=%s\n"
1378 "ClientTimeout=%d\n",
1379 sm->reqMethod,
1380 eap_sm_method_state_txt(sm->methodState),
1381 eap_sm_decision_txt(sm->decision),
1382 sm->ClientTimeout);
1383 if (ret < 0 || (size_t) ret >= buflen - len)
1384 return len;
1385 len += ret;
1388 return len;
1390 #endif /* CONFIG_CTRL_IFACE */
1393 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
1394 typedef enum {
1395 TYPE_IDENTITY, TYPE_PASSWORD, TYPE_OTP, TYPE_PIN, TYPE_NEW_PASSWORD,
1396 TYPE_PASSPHRASE
1397 } eap_ctrl_req_type;
1399 static void eap_sm_request(struct eap_sm *sm, eap_ctrl_req_type type,
1400 const char *msg, size_t msglen)
1402 struct wpa_ssid *config;
1403 char *buf;
1404 size_t buflen;
1405 int len;
1406 char *field;
1407 char *txt, *tmp;
1409 if (sm == NULL)
1410 return;
1411 config = eap_get_config(sm);
1412 if (config == NULL)
1413 return;
1415 switch (type) {
1416 case TYPE_IDENTITY:
1417 field = "IDENTITY";
1418 txt = "Identity";
1419 config->pending_req_identity++;
1420 break;
1421 case TYPE_PASSWORD:
1422 field = "PASSWORD";
1423 txt = "Password";
1424 config->pending_req_password++;
1425 break;
1426 case TYPE_NEW_PASSWORD:
1427 field = "NEW_PASSWORD";
1428 txt = "New Password";
1429 config->pending_req_new_password++;
1430 break;
1431 case TYPE_PIN:
1432 field = "PIN";
1433 txt = "PIN";
1434 config->pending_req_pin++;
1435 break;
1436 case TYPE_OTP:
1437 field = "OTP";
1438 if (msg) {
1439 tmp = os_malloc(msglen + 3);
1440 if (tmp == NULL)
1441 return;
1442 tmp[0] = '[';
1443 os_memcpy(tmp + 1, msg, msglen);
1444 tmp[msglen + 1] = ']';
1445 tmp[msglen + 2] = '\0';
1446 txt = tmp;
1447 os_free(config->pending_req_otp);
1448 config->pending_req_otp = tmp;
1449 config->pending_req_otp_len = msglen + 3;
1450 } else {
1451 if (config->pending_req_otp == NULL)
1452 return;
1453 txt = config->pending_req_otp;
1455 break;
1456 case TYPE_PASSPHRASE:
1457 field = "PASSPHRASE";
1458 txt = "Private key passphrase";
1459 config->pending_req_passphrase++;
1460 break;
1461 default:
1462 return;
1465 buflen = 100 + os_strlen(txt) + config->ssid_len;
1466 buf = os_malloc(buflen);
1467 if (buf == NULL)
1468 return;
1469 len = os_snprintf(buf, buflen,
1470 WPA_CTRL_REQ "%s-%d:%s needed for SSID ",
1471 field, config->id, txt);
1472 if (len < 0 || (size_t) len >= buflen) {
1473 os_free(buf);
1474 return;
1476 if (config->ssid && buflen > len + config->ssid_len) {
1477 os_memcpy(buf + len, config->ssid, config->ssid_len);
1478 len += config->ssid_len;
1479 buf[len] = '\0';
1481 buf[buflen - 1] = '\0';
1482 wpa_msg(sm->msg_ctx, MSG_INFO, "%s", buf);
1483 os_free(buf);
1485 #else /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
1486 #define eap_sm_request(sm, type, msg, msglen) do { } while (0)
1487 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
1491 * eap_sm_request_identity - Request identity from user (ctrl_iface)
1492 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1494 * EAP methods can call this function to request identity information for the
1495 * current network. This is normally called when the identity is not included
1496 * in the network configuration. The request will be sent to monitor programs
1497 * through the control interface.
1499 void eap_sm_request_identity(struct eap_sm *sm)
1501 eap_sm_request(sm, TYPE_IDENTITY, NULL, 0);
1506 * eap_sm_request_password - Request password from user (ctrl_iface)
1507 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1509 * EAP methods can call this function to request password information for the
1510 * current network. This is normally called when the password is not included
1511 * in the network configuration. The request will be sent to monitor programs
1512 * through the control interface.
1514 void eap_sm_request_password(struct eap_sm *sm)
1516 eap_sm_request(sm, TYPE_PASSWORD, NULL, 0);
1521 * eap_sm_request_new_password - Request new password from user (ctrl_iface)
1522 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1524 * EAP methods can call this function to request new password information for
1525 * the current network. This is normally called when the EAP method indicates
1526 * that the current password has expired and password change is required. The
1527 * request will be sent to monitor programs through the control interface.
1529 void eap_sm_request_new_password(struct eap_sm *sm)
1531 eap_sm_request(sm, TYPE_NEW_PASSWORD, NULL, 0);
1536 * eap_sm_request_pin - Request SIM or smart card PIN from user (ctrl_iface)
1537 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1539 * EAP methods can call this function to request SIM or smart card PIN
1540 * information for the current network. This is normally called when the PIN is
1541 * not included in the network configuration. The request will be sent to
1542 * monitor programs through the control interface.
1544 void eap_sm_request_pin(struct eap_sm *sm)
1546 eap_sm_request(sm, TYPE_PIN, NULL, 0);
1551 * eap_sm_request_otp - Request one time password from user (ctrl_iface)
1552 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1553 * @msg: Message to be displayed to the user when asking for OTP
1554 * @msg_len: Length of the user displayable message
1556 * EAP methods can call this function to request open time password (OTP) for
1557 * the current network. The request will be sent to monitor programs through
1558 * the control interface.
1560 void eap_sm_request_otp(struct eap_sm *sm, const char *msg, size_t msg_len)
1562 eap_sm_request(sm, TYPE_OTP, msg, msg_len);
1567 * eap_sm_request_passphrase - Request passphrase from user (ctrl_iface)
1568 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1570 * EAP methods can call this function to request passphrase for a private key
1571 * for the current network. This is normally called when the passphrase is not
1572 * included in the network configuration. The request will be sent to monitor
1573 * programs through the control interface.
1575 void eap_sm_request_passphrase(struct eap_sm *sm)
1577 eap_sm_request(sm, TYPE_PASSPHRASE, NULL, 0);
1582 * eap_sm_notify_ctrl_attached - Notification of attached monitor
1583 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1585 * Notify EAP state machines that a monitor was attached to the control
1586 * interface to trigger re-sending of pending requests for user input.
1588 void eap_sm_notify_ctrl_attached(struct eap_sm *sm)
1590 struct wpa_ssid *config = eap_get_config(sm);
1592 if (config == NULL)
1593 return;
1595 /* Re-send any pending requests for user data since a new control
1596 * interface was added. This handles cases where the EAP authentication
1597 * starts immediately after system startup when the user interface is
1598 * not yet running. */
1599 if (config->pending_req_identity)
1600 eap_sm_request_identity(sm);
1601 if (config->pending_req_password)
1602 eap_sm_request_password(sm);
1603 if (config->pending_req_new_password)
1604 eap_sm_request_new_password(sm);
1605 if (config->pending_req_otp)
1606 eap_sm_request_otp(sm, NULL, 0);
1607 if (config->pending_req_pin)
1608 eap_sm_request_pin(sm);
1609 if (config->pending_req_passphrase)
1610 eap_sm_request_passphrase(sm);
1614 static int eap_allowed_phase2_type(int vendor, int type)
1616 if (vendor != EAP_VENDOR_IETF)
1617 return 0;
1618 return type != EAP_TYPE_PEAP && type != EAP_TYPE_TTLS &&
1619 type != EAP_TYPE_FAST;
1624 * eap_get_phase2_type - Get EAP type for the given EAP phase 2 method name
1625 * @name: EAP method name, e.g., MD5
1626 * @vendor: Buffer for returning EAP Vendor-Id
1627 * Returns: EAP method type or %EAP_TYPE_NONE if not found
1629 * This function maps EAP type names into EAP type numbers that are allowed for
1630 * Phase 2, i.e., for tunneled authentication. Phase 2 is used, e.g., with
1631 * EAP-PEAP, EAP-TTLS, and EAP-FAST.
1633 u32 eap_get_phase2_type(const char *name, int *vendor)
1635 int v;
1636 u8 type = eap_get_type(name, &v);
1637 if (eap_allowed_phase2_type(v, type)) {
1638 *vendor = v;
1639 return type;
1641 *vendor = EAP_VENDOR_IETF;
1642 return EAP_TYPE_NONE;
1647 * eap_get_phase2_types - Get list of allowed EAP phase 2 types
1648 * @config: Pointer to a network configuration
1649 * @count: Pointer to a variable to be filled with number of returned EAP types
1650 * Returns: Pointer to allocated type list or %NULL on failure
1652 * This function generates an array of allowed EAP phase 2 (tunneled) types for
1653 * the given network configuration.
1655 struct eap_method_type * eap_get_phase2_types(struct wpa_ssid *config,
1656 size_t *count)
1658 struct eap_method_type *buf;
1659 u32 method;
1660 int vendor;
1661 size_t mcount;
1662 const struct eap_method *methods, *m;
1664 methods = eap_peer_get_methods(&mcount);
1665 if (methods == NULL)
1666 return NULL;
1667 *count = 0;
1668 buf = os_malloc(mcount * sizeof(struct eap_method_type));
1669 if (buf == NULL)
1670 return NULL;
1672 for (m = methods; m; m = m->next) {
1673 vendor = m->vendor;
1674 method = m->method;
1675 if (eap_allowed_phase2_type(vendor, method)) {
1676 if (vendor == EAP_VENDOR_IETF &&
1677 method == EAP_TYPE_TLS && config &&
1678 config->private_key2 == NULL)
1679 continue;
1680 buf[*count].vendor = vendor;
1681 buf[*count].method = method;
1682 (*count)++;
1686 return buf;
1691 * eap_set_fast_reauth - Update fast_reauth setting
1692 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1693 * @enabled: 1 = Fast reauthentication is enabled, 0 = Disabled
1695 void eap_set_fast_reauth(struct eap_sm *sm, int enabled)
1697 sm->fast_reauth = enabled;
1702 * eap_set_workaround - Update EAP workarounds setting
1703 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1704 * @workaround: 1 = Enable EAP workarounds, 0 = Disable EAP workarounds
1706 void eap_set_workaround(struct eap_sm *sm, unsigned int workaround)
1708 sm->workaround = workaround;
1713 * eap_get_config - Get current network configuration
1714 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1715 * Returns: Pointer to the current network configuration or %NULL if not found
1717 * EAP peer methods should avoid using this function if they can use other
1718 * access functions, like eap_get_config_identity() and
1719 * eap_get_config_password(), that do not require direct access to
1720 * struct wpa_ssid.
1722 struct wpa_ssid * eap_get_config(struct eap_sm *sm)
1724 return sm->eapol_cb->get_config(sm->eapol_ctx);
1729 * eap_get_config_password - Get identity from the network configuration
1730 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1731 * @len: Buffer for the length of the identity
1732 * Returns: Pointer to the identity or %NULL if not found
1734 const u8 * eap_get_config_identity(struct eap_sm *sm, size_t *len)
1736 struct wpa_ssid *config = eap_get_config(sm);
1737 if (config == NULL)
1738 return NULL;
1739 *len = config->identity_len;
1740 return config->identity;
1745 * eap_get_config_password - Get password from the network configuration
1746 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1747 * @len: Buffer for the length of the password
1748 * Returns: Pointer to the password or %NULL if not found
1750 const u8 * eap_get_config_password(struct eap_sm *sm, size_t *len)
1752 struct wpa_ssid *config = eap_get_config(sm);
1753 if (config == NULL)
1754 return NULL;
1755 *len = config->password_len;
1756 return config->password;
1761 * eap_get_config_new_password - Get new password from network configuration
1762 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1763 * @len: Buffer for the length of the new password
1764 * Returns: Pointer to the new password or %NULL if not found
1766 const u8 * eap_get_config_new_password(struct eap_sm *sm, size_t *len)
1768 struct wpa_ssid *config = eap_get_config(sm);
1769 if (config == NULL)
1770 return NULL;
1771 *len = config->new_password_len;
1772 return config->new_password;
1777 * eap_get_config_otp - Get one-time password from the network configuration
1778 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1779 * @len: Buffer for the length of the one-time password
1780 * Returns: Pointer to the one-time password or %NULL if not found
1782 const u8 * eap_get_config_otp(struct eap_sm *sm, size_t *len)
1784 struct wpa_ssid *config = eap_get_config(sm);
1785 if (config == NULL)
1786 return NULL;
1787 *len = config->otp_len;
1788 return config->otp;
1793 * eap_clear_config_otp - Clear used one-time password
1794 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1796 * This function clears a used one-time password (OTP) from the current network
1797 * configuration. This should be called when the OTP has been used and is not
1798 * needed anymore.
1800 void eap_clear_config_otp(struct eap_sm *sm)
1802 struct wpa_ssid *config = eap_get_config(sm);
1803 if (config == NULL)
1804 return;
1805 os_memset(config->otp, 0, config->otp_len);
1806 os_free(config->otp);
1807 config->otp = NULL;
1808 config->otp_len = 0;
1813 * eap_key_available - Get key availability (eapKeyAvailable variable)
1814 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1815 * Returns: 1 if EAP keying material is available, 0 if not
1817 int eap_key_available(struct eap_sm *sm)
1819 return sm ? sm->eapKeyAvailable : 0;
1824 * eap_notify_success - Notify EAP state machine about external success trigger
1825 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1827 * This function is called when external event, e.g., successful completion of
1828 * WPA-PSK key handshake, is indicating that EAP state machine should move to
1829 * success state. This is mainly used with security modes that do not use EAP
1830 * state machine (e.g., WPA-PSK).
1832 void eap_notify_success(struct eap_sm *sm)
1834 if (sm) {
1835 sm->decision = DECISION_COND_SUCC;
1836 sm->EAP_state = EAP_SUCCESS;
1842 * eap_notify_lower_layer_success - Notification of lower layer success
1843 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1845 * Notify EAP state machines that a lower layer has detected a successful
1846 * authentication. This is used to recover from dropped EAP-Success messages.
1848 void eap_notify_lower_layer_success(struct eap_sm *sm)
1850 if (sm == NULL)
1851 return;
1853 if (eapol_get_bool(sm, EAPOL_eapSuccess) ||
1854 sm->decision == DECISION_FAIL ||
1855 (sm->methodState != METHOD_MAY_CONT &&
1856 sm->methodState != METHOD_DONE))
1857 return;
1859 if (sm->eapKeyData != NULL)
1860 sm->eapKeyAvailable = TRUE;
1861 eapol_set_bool(sm, EAPOL_eapSuccess, TRUE);
1862 wpa_msg(sm->msg_ctx, MSG_INFO, WPA_EVENT_EAP_SUCCESS
1863 "EAP authentication completed successfully (based on lower "
1864 "layer success)");
1869 * eap_get_eapKeyData - Get master session key (MSK) from EAP state machine
1870 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1871 * @len: Pointer to variable that will be set to number of bytes in the key
1872 * Returns: Pointer to the EAP keying data or %NULL on failure
1874 * Fetch EAP keying material (MSK, eapKeyData) from the EAP state machine. The
1875 * key is available only after a successful authentication. EAP state machine
1876 * continues to manage the key data and the caller must not change or free the
1877 * returned data.
1879 const u8 * eap_get_eapKeyData(struct eap_sm *sm, size_t *len)
1881 if (sm == NULL || sm->eapKeyData == NULL) {
1882 *len = 0;
1883 return NULL;
1886 *len = sm->eapKeyDataLen;
1887 return sm->eapKeyData;
1892 * eap_get_eapKeyData - Get EAP response data
1893 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1894 * @len: Pointer to variable that will be set to the length of the response
1895 * Returns: Pointer to the EAP response (eapRespData) or %NULL on failure
1897 * Fetch EAP response (eapRespData) from the EAP state machine. This data is
1898 * available when EAP state machine has processed an incoming EAP request. The
1899 * EAP state machine does not maintain a reference to the response after this
1900 * function is called and the caller is responsible for freeing the data.
1902 u8 * eap_get_eapRespData(struct eap_sm *sm, size_t *len)
1904 u8 *resp;
1906 if (sm == NULL || sm->eapRespData == NULL) {
1907 *len = 0;
1908 return NULL;
1911 resp = sm->eapRespData;
1912 *len = sm->eapRespDataLen;
1913 sm->eapRespData = NULL;
1914 sm->eapRespDataLen = 0;
1916 return resp;
1921 * eap_sm_register_scard_ctx - Notification of smart card context
1922 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
1923 * @ctx: Context data for smart card operations
1925 * Notify EAP state machines of context data for smart card operations. This
1926 * context data will be used as a parameter for scard_*() functions.
1928 void eap_register_scard_ctx(struct eap_sm *sm, void *ctx)
1930 if (sm)
1931 sm->scard_ctx = ctx;
1936 * eap_hdr_validate - Validate EAP header
1937 * @vendor: Expected EAP Vendor-Id (0 = IETF)
1938 * @eap_type: Expected EAP type number
1939 * @msg: EAP frame (starting with EAP header)
1940 * @msglen: Length of msg
1941 * @plen: Pointer to variable to contain the returned payload length
1942 * Returns: Pointer to EAP payload (after type field), or %NULL on failure
1944 * This is a helper function for EAP method implementations. This is usually
1945 * called in the beginning of struct eap_method::process() function to verify
1946 * that the received EAP request packet has a valid header. This function is
1947 * able to process both legacy and expanded EAP headers and in most cases, the
1948 * caller can just use the returned payload pointer (into *plen) for processing
1949 * the payload regardless of whether the packet used the expanded EAP header or
1950 * not.
1952 const u8 * eap_hdr_validate(int vendor, EapType eap_type,
1953 const u8 *msg, size_t msglen, size_t *plen)
1955 const struct eap_hdr *hdr;
1956 const u8 *pos;
1957 size_t len;
1959 hdr = (const struct eap_hdr *) msg;
1961 if (msglen < sizeof(*hdr)) {
1962 wpa_printf(MSG_INFO, "EAP: Too short EAP frame");
1963 return NULL;
1966 len = be_to_host16(hdr->length);
1967 if (len < sizeof(*hdr) + 1 || len > msglen) {
1968 wpa_printf(MSG_INFO, "EAP: Invalid EAP length");
1969 return NULL;
1972 pos = (const u8 *) (hdr + 1);
1974 if (*pos == EAP_TYPE_EXPANDED) {
1975 int exp_vendor;
1976 u32 exp_type;
1977 if (len < sizeof(*hdr) + 8) {
1978 wpa_printf(MSG_INFO, "EAP: Invalid expanded EAP "
1979 "length");
1980 return NULL;
1982 pos++;
1983 exp_vendor = WPA_GET_BE24(pos);
1984 pos += 3;
1985 exp_type = WPA_GET_BE32(pos);
1986 pos += 4;
1987 if (exp_vendor != vendor || exp_type != (u32) eap_type) {
1988 wpa_printf(MSG_INFO, "EAP: Invalid expanded frame "
1989 "type");
1990 return NULL;
1993 *plen = len - sizeof(*hdr) - 8;
1994 return pos;
1995 } else {
1996 if (vendor != EAP_VENDOR_IETF || *pos != eap_type) {
1997 wpa_printf(MSG_INFO, "EAP: Invalid frame type");
1998 return NULL;
2000 *plen = len - sizeof(*hdr) - 1;
2001 return pos + 1;
2007 * eap_set_config_blob - Set or add a named configuration blob
2008 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
2009 * @blob: New value for the blob
2011 * Adds a new configuration blob or replaces the current value of an existing
2012 * blob.
2014 void eap_set_config_blob(struct eap_sm *sm, struct wpa_config_blob *blob)
2016 sm->eapol_cb->set_config_blob(sm->eapol_ctx, blob);
2021 * eap_get_config_blob - Get a named configuration blob
2022 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
2023 * @name: Name of the blob
2024 * Returns: Pointer to blob data or %NULL if not found
2026 const struct wpa_config_blob * eap_get_config_blob(struct eap_sm *sm,
2027 const char *name)
2029 return sm->eapol_cb->get_config_blob(sm->eapol_ctx, name);
2034 * eap_set_force_disabled - Set force_disabled flag
2035 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
2036 * @disabled: 1 = EAP disabled, 0 = EAP enabled
2038 * This function is used to force EAP state machine to be disabled when it is
2039 * not in use (e.g., with WPA-PSK or plaintext connections).
2041 void eap_set_force_disabled(struct eap_sm *sm, int disabled)
2043 sm->force_disabled = disabled;
2048 * eap_msg_alloc - Allocate a buffer for an EAP message
2049 * @vendor: Vendor-Id (0 = IETF)
2050 * @type: EAP type
2051 * @len: Buffer for returning message length
2052 * @payload_len: Payload length in bytes (data after Type)
2053 * @code: Message Code (EAP_CODE_*)
2054 * @identifier: Identifier
2055 * @payload: Pointer to payload pointer that will be set to point to the
2056 * beginning of the payload or %NULL if payload pointer is not needed
2057 * Returns: Pointer to the allocated message buffer or %NULL on error
2059 * This function can be used to allocate a buffer for an EAP message and fill
2060 * in the EAP header. This function is automatically using expanded EAP header
2061 * if the selected Vendor-Id is not IETF. In other words, most EAP methods do
2062 * not need to separately select which header type to use when using this
2063 * function to allocate the message buffers.
2065 struct eap_hdr * eap_msg_alloc(int vendor, EapType type, size_t *len,
2066 size_t payload_len, u8 code, u8 identifier,
2067 u8 **payload)
2069 struct eap_hdr *hdr;
2070 u8 *pos;
2072 *len = sizeof(struct eap_hdr) + (vendor == EAP_VENDOR_IETF ? 1 : 8) +
2073 payload_len;
2074 hdr = os_malloc(*len);
2075 if (hdr) {
2076 hdr->code = code;
2077 hdr->identifier = identifier;
2078 hdr->length = host_to_be16(*len);
2079 pos = (u8 *) (hdr + 1);
2080 if (vendor == EAP_VENDOR_IETF) {
2081 *pos++ = type;
2082 } else {
2083 *pos++ = EAP_TYPE_EXPANDED;
2084 WPA_PUT_BE24(pos, vendor);
2085 pos += 3;
2086 WPA_PUT_BE32(pos, type);
2087 pos += 4;
2089 if (payload)
2090 *payload = pos;
2093 return hdr;
2098 * eap_notify_pending - Notify that EAP method is ready to re-process a request
2099 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
2101 * An EAP method can perform a pending operation (e.g., to get a response from
2102 * an external process). Once the response is available, this function can be
2103 * used to request EAPOL state machine to retry delivering the previously
2104 * received (and still unanswered) EAP request to EAP state machine.
2106 void eap_notify_pending(struct eap_sm *sm)
2108 sm->eapol_cb->notify_pending(sm->eapol_ctx);
2113 * eap_invalidate_cached_session - Mark cached session data invalid
2114 * @sm: Pointer to EAP state machine allocated with eap_sm_init()
2116 void eap_invalidate_cached_session(struct eap_sm *sm)
2118 if (sm)
2119 eap_deinit_prev_method(sm, "invalidate");