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1 /*
2  * IEEE 802.1X-2004 Authenticator - EAPOL state machine
3  * Copyright (c) 2002-2015, Jouni Malinen <j@w1.fi>
4  *
5  * This software may be distributed under the terms of the BSD license.
6  * See README for more details.
7  */
8 
9 #include "includes.h"
10 
11 #include "common.h"
12 #include "eloop.h"
13 #include "state_machine.h"
14 #include "common/eapol_common.h"
15 #include "eap_common/eap_defs.h"
16 #include "eap_common/eap_common.h"
17 #include "eap_server/eap.h"
18 #include "eapol_auth_sm.h"
19 #include "eapol_auth_sm_i.h"
20 
21 #define STATE_MACHINE_DATA struct eapol_state_machine
22 #define STATE_MACHINE_DEBUG_PREFIX "IEEE 802.1X"
23 #define STATE_MACHINE_ADDR sm->addr
24 
25 static const struct eapol_callbacks eapol_cb;
26 
27 /* EAPOL state machines are described in IEEE Std 802.1X-2004, Chap. 8.2 */
28 
29 #define setPortAuthorized() \
30 sm->eapol->cb.set_port_authorized(sm->eapol->conf.ctx, sm->sta, 1)
31 #define setPortUnauthorized() \
32 sm->eapol->cb.set_port_authorized(sm->eapol->conf.ctx, sm->sta, 0)
33 
34 /* procedures */
35 #define txCannedFail() eapol_auth_tx_canned_eap(sm, 0)
36 #define txCannedSuccess() eapol_auth_tx_canned_eap(sm, 1)
37 #define txReq() eapol_auth_tx_req(sm)
38 #define abortAuth() sm->eapol->cb.abort_auth(sm->eapol->conf.ctx, sm->sta)
39 #define txKey() sm->eapol->cb.tx_key(sm->eapol->conf.ctx, sm->sta)
40 #define processKey() do { } while (0)
41 
42 
43 static void eapol_sm_step_run(struct eapol_state_machine *sm);
44 static void eapol_sm_step_cb(void *eloop_ctx, void *timeout_ctx);
45 static void eapol_auth_initialize(struct eapol_state_machine *sm);
46 static void eapol_auth_conf_free(struct eapol_auth_config *conf);
47 
48 
eapol_auth_logger(struct eapol_authenticator * eapol,const u8 * addr,eapol_logger_level level,const char * txt)49 static void eapol_auth_logger(struct eapol_authenticator *eapol,
50 			      const u8 *addr, eapol_logger_level level,
51 			      const char *txt)
52 {
53 	if (eapol->cb.logger == NULL)
54 		return;
55 	eapol->cb.logger(eapol->conf.ctx, addr, level, txt);
56 }
57 
58 
eapol_auth_vlogger(struct eapol_authenticator * eapol,const u8 * addr,eapol_logger_level level,const char * fmt,...)59 static void eapol_auth_vlogger(struct eapol_authenticator *eapol,
60 			       const u8 *addr, eapol_logger_level level,
61 			       const char *fmt, ...)
62 {
63 	char *format;
64 	int maxlen;
65 	va_list ap;
66 
67 	if (eapol->cb.logger == NULL)
68 		return;
69 
70 	maxlen = os_strlen(fmt) + 100;
71 	format = os_malloc(maxlen);
72 	if (!format)
73 		return;
74 
75 	va_start(ap, fmt);
76 	vsnprintf(format, maxlen, fmt, ap);
77 	va_end(ap);
78 
79 	eapol_auth_logger(eapol, addr, level, format);
80 
81 	os_free(format);
82 }
83 
84 
eapol_auth_tx_canned_eap(struct eapol_state_machine * sm,int success)85 static void eapol_auth_tx_canned_eap(struct eapol_state_machine *sm,
86 				     int success)
87 {
88 	struct eap_hdr eap;
89 
90 	os_memset(&eap, 0, sizeof(eap));
91 
92 	eap.code = success ? EAP_CODE_SUCCESS : EAP_CODE_FAILURE;
93 	eap.identifier = ++sm->last_eap_id;
94 	eap.length = host_to_be16(sizeof(eap));
95 
96 	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_DEBUG,
97 			   "Sending canned EAP packet %s (identifier %d)",
98 			   success ? "SUCCESS" : "FAILURE", eap.identifier);
99 	sm->eapol->cb.eapol_send(sm->eapol->conf.ctx, sm->sta,
100 				 IEEE802_1X_TYPE_EAP_PACKET,
101 				 (u8 *) &eap, sizeof(eap));
102 	sm->dot1xAuthEapolFramesTx++;
103 }
104 
105 
eapol_auth_tx_req(struct eapol_state_machine * sm)106 static void eapol_auth_tx_req(struct eapol_state_machine *sm)
107 {
108 	if (sm->eap_if->eapReqData == NULL ||
109 	    wpabuf_len(sm->eap_if->eapReqData) < sizeof(struct eap_hdr)) {
110 		eapol_auth_logger(sm->eapol, sm->addr,
111 				  EAPOL_LOGGER_DEBUG,
112 				  "TxReq called, but there is no EAP request "
113 				  "from authentication server");
114 		return;
115 	}
116 
117 	if (sm->flags & EAPOL_SM_WAIT_START) {
118 		wpa_printf(MSG_DEBUG, "EAPOL: Drop EAPOL TX to " MACSTR
119 			   " while waiting for EAPOL-Start",
120 			   MAC2STR(sm->addr));
121 		return;
122 	}
123 
124 	sm->last_eap_id = eap_get_id(sm->eap_if->eapReqData);
125 	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_DEBUG,
126 			   "Sending EAP Packet (identifier %d)",
127 			   sm->last_eap_id);
128 	sm->eapol->cb.eapol_send(sm->eapol->conf.ctx, sm->sta,
129 				 IEEE802_1X_TYPE_EAP_PACKET,
130 				 wpabuf_head(sm->eap_if->eapReqData),
131 				 wpabuf_len(sm->eap_if->eapReqData));
132 	sm->dot1xAuthEapolFramesTx++;
133 	if (eap_get_type(sm->eap_if->eapReqData) == EAP_TYPE_IDENTITY)
134 		sm->dot1xAuthEapolReqIdFramesTx++;
135 	else
136 		sm->dot1xAuthEapolReqFramesTx++;
137 }
138 
139 
140 /**
141  * eapol_port_timers_tick - Port Timers state machine
142  * @eloop_ctx: struct eapol_state_machine *
143  * @timeout_ctx: Not used
144  *
145  * This statemachine is implemented as a function that will be called
146  * once a second as a registered event loop timeout.
147  */
eapol_port_timers_tick(void * eloop_ctx,void * timeout_ctx)148 static void eapol_port_timers_tick(void *eloop_ctx, void *timeout_ctx)
149 {
150 	struct eapol_state_machine *state = timeout_ctx;
151 
152 	if (state->aWhile > 0) {
153 		state->aWhile--;
154 		if (state->aWhile == 0) {
155 			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
156 				   " - aWhile --> 0",
157 				   MAC2STR(state->addr));
158 		}
159 	}
160 
161 	if (state->quietWhile > 0) {
162 		state->quietWhile--;
163 		if (state->quietWhile == 0) {
164 			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
165 				   " - quietWhile --> 0",
166 				   MAC2STR(state->addr));
167 		}
168 	}
169 
170 	if (state->reAuthWhen > 0) {
171 		state->reAuthWhen--;
172 		if (state->reAuthWhen == 0) {
173 			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
174 				   " - reAuthWhen --> 0",
175 				   MAC2STR(state->addr));
176 		}
177 	}
178 
179 	if (state->eap_if->retransWhile > 0) {
180 		state->eap_if->retransWhile--;
181 		if (state->eap_if->retransWhile == 0) {
182 			wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
183 				   " - (EAP) retransWhile --> 0",
184 				   MAC2STR(state->addr));
185 		}
186 	}
187 
188 	eapol_sm_step_run(state);
189 
190 	eloop_register_timeout(1, 0, eapol_port_timers_tick, eloop_ctx, state);
191 }
192 
193 
194 
195 /* Authenticator PAE state machine */
196 
SM_STATE(AUTH_PAE,INITIALIZE)197 SM_STATE(AUTH_PAE, INITIALIZE)
198 {
199 	SM_ENTRY_MA(AUTH_PAE, INITIALIZE, auth_pae);
200 	sm->portMode = Auto;
201 
202 	/*
203 	 * Clearing keyRun here is not specified in IEEE Std 802.1X-2004, but
204 	 * it looks like this would be logical thing to do here since the
205 	 * EAPOL-Key exchange is not possible in this state. It is possible to
206 	 * get here on disconnection event without advancing to the
207 	 * AUTHENTICATING state to clear keyRun before the IEEE 802.11 RSN
208 	 * authenticator state machine runs and that may advance from
209 	 * AUTHENTICATION2 to INITPMK if keyRun = TRUE has been left from the
210 	 * last association. This can be avoided by clearing keyRun here.
211 	 */
212 	sm->keyRun = FALSE;
213 }
214 
215 
SM_STATE(AUTH_PAE,DISCONNECTED)216 SM_STATE(AUTH_PAE, DISCONNECTED)
217 {
218 	int from_initialize = sm->auth_pae_state == AUTH_PAE_INITIALIZE;
219 
220 	if (sm->eapolLogoff) {
221 		if (sm->auth_pae_state == AUTH_PAE_CONNECTING)
222 			sm->authEapLogoffsWhileConnecting++;
223 		else if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATED)
224 			sm->authAuthEapLogoffWhileAuthenticated++;
225 	}
226 
227 	SM_ENTRY_MA(AUTH_PAE, DISCONNECTED, auth_pae);
228 
229 	sm->authPortStatus = Unauthorized;
230 	setPortUnauthorized();
231 	sm->reAuthCount = 0;
232 	sm->eapolLogoff = FALSE;
233 	if (!from_initialize) {
234 		sm->eapol->cb.finished(sm->eapol->conf.ctx, sm->sta, 0,
235 				       sm->flags & EAPOL_SM_PREAUTH,
236 				       sm->remediation);
237 	}
238 }
239 
240 
SM_STATE(AUTH_PAE,RESTART)241 SM_STATE(AUTH_PAE, RESTART)
242 {
243 	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATED) {
244 		if (sm->reAuthenticate)
245 			sm->authAuthReauthsWhileAuthenticated++;
246 		if (sm->eapolStart)
247 			sm->authAuthEapStartsWhileAuthenticated++;
248 		if (sm->eapolLogoff)
249 			sm->authAuthEapLogoffWhileAuthenticated++;
250 	}
251 
252 	SM_ENTRY_MA(AUTH_PAE, RESTART, auth_pae);
253 
254 	sm->eap_if->eapRestart = TRUE;
255 }
256 
257 
SM_STATE(AUTH_PAE,CONNECTING)258 SM_STATE(AUTH_PAE, CONNECTING)
259 {
260 	if (sm->auth_pae_state != AUTH_PAE_CONNECTING)
261 		sm->authEntersConnecting++;
262 
263 	SM_ENTRY_MA(AUTH_PAE, CONNECTING, auth_pae);
264 
265 	sm->reAuthenticate = FALSE;
266 	sm->reAuthCount++;
267 }
268 
269 
SM_STATE(AUTH_PAE,HELD)270 SM_STATE(AUTH_PAE, HELD)
271 {
272 	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATING && sm->authFail)
273 		sm->authAuthFailWhileAuthenticating++;
274 
275 	SM_ENTRY_MA(AUTH_PAE, HELD, auth_pae);
276 
277 	sm->authPortStatus = Unauthorized;
278 	setPortUnauthorized();
279 	sm->quietWhile = sm->quietPeriod;
280 	sm->eapolLogoff = FALSE;
281 
282 	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_WARNING,
283 			   "authentication failed - EAP type: %d (%s)",
284 			   sm->eap_type_authsrv,
285 			   eap_server_get_name(0, sm->eap_type_authsrv));
286 	if (sm->eap_type_authsrv != sm->eap_type_supp) {
287 		eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_INFO,
288 				   "Supplicant used different EAP type: "
289 				   "%d (%s)", sm->eap_type_supp,
290 				   eap_server_get_name(0, sm->eap_type_supp));
291 	}
292 	sm->eapol->cb.finished(sm->eapol->conf.ctx, sm->sta, 0,
293 			       sm->flags & EAPOL_SM_PREAUTH, sm->remediation);
294 }
295 
296 
SM_STATE(AUTH_PAE,AUTHENTICATED)297 SM_STATE(AUTH_PAE, AUTHENTICATED)
298 {
299 	char *extra = "";
300 
301 	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATING && sm->authSuccess)
302 		sm->authAuthSuccessesWhileAuthenticating++;
303 
304 	SM_ENTRY_MA(AUTH_PAE, AUTHENTICATED, auth_pae);
305 
306 	sm->authPortStatus = Authorized;
307 	setPortAuthorized();
308 	sm->reAuthCount = 0;
309 	if (sm->flags & EAPOL_SM_PREAUTH)
310 		extra = " (pre-authentication)";
311 	else if (sm->flags & EAPOL_SM_FROM_PMKSA_CACHE)
312 		extra = " (PMKSA cache)";
313 	eapol_auth_vlogger(sm->eapol, sm->addr, EAPOL_LOGGER_INFO,
314 			   "authenticated - EAP type: %d (%s)%s",
315 			   sm->eap_type_authsrv,
316 			   eap_server_get_name(0, sm->eap_type_authsrv),
317 			   extra);
318 	sm->eapol->cb.finished(sm->eapol->conf.ctx, sm->sta, 1,
319 			       sm->flags & EAPOL_SM_PREAUTH, sm->remediation);
320 }
321 
322 
SM_STATE(AUTH_PAE,AUTHENTICATING)323 SM_STATE(AUTH_PAE, AUTHENTICATING)
324 {
325 	SM_ENTRY_MA(AUTH_PAE, AUTHENTICATING, auth_pae);
326 
327 	sm->eapolStart = FALSE;
328 	sm->authSuccess = FALSE;
329 	sm->authFail = FALSE;
330 	sm->authTimeout = FALSE;
331 	sm->authStart = TRUE;
332 	sm->keyRun = FALSE;
333 	sm->keyDone = FALSE;
334 }
335 
336 
SM_STATE(AUTH_PAE,ABORTING)337 SM_STATE(AUTH_PAE, ABORTING)
338 {
339 	if (sm->auth_pae_state == AUTH_PAE_AUTHENTICATING) {
340 		if (sm->authTimeout)
341 			sm->authAuthTimeoutsWhileAuthenticating++;
342 		if (sm->eapolStart)
343 			sm->authAuthEapStartsWhileAuthenticating++;
344 		if (sm->eapolLogoff)
345 			sm->authAuthEapLogoffWhileAuthenticating++;
346 	}
347 
348 	SM_ENTRY_MA(AUTH_PAE, ABORTING, auth_pae);
349 
350 	sm->authAbort = TRUE;
351 	sm->keyRun = FALSE;
352 	sm->keyDone = FALSE;
353 }
354 
355 
SM_STATE(AUTH_PAE,FORCE_AUTH)356 SM_STATE(AUTH_PAE, FORCE_AUTH)
357 {
358 	SM_ENTRY_MA(AUTH_PAE, FORCE_AUTH, auth_pae);
359 
360 	sm->authPortStatus = Authorized;
361 	setPortAuthorized();
362 	sm->portMode = ForceAuthorized;
363 	sm->eapolStart = FALSE;
364 	txCannedSuccess();
365 }
366 
367 
SM_STATE(AUTH_PAE,FORCE_UNAUTH)368 SM_STATE(AUTH_PAE, FORCE_UNAUTH)
369 {
370 	SM_ENTRY_MA(AUTH_PAE, FORCE_UNAUTH, auth_pae);
371 
372 	sm->authPortStatus = Unauthorized;
373 	setPortUnauthorized();
374 	sm->portMode = ForceUnauthorized;
375 	sm->eapolStart = FALSE;
376 	txCannedFail();
377 }
378 
379 
SM_STEP(AUTH_PAE)380 SM_STEP(AUTH_PAE)
381 {
382 	if ((sm->portControl == Auto && sm->portMode != sm->portControl) ||
383 	    sm->initialize || !sm->eap_if->portEnabled)
384 		SM_ENTER_GLOBAL(AUTH_PAE, INITIALIZE);
385 	else if (sm->portControl == ForceAuthorized &&
386 		 sm->portMode != sm->portControl &&
387 		 !(sm->initialize || !sm->eap_if->portEnabled))
388 		SM_ENTER_GLOBAL(AUTH_PAE, FORCE_AUTH);
389 	else if (sm->portControl == ForceUnauthorized &&
390 		 sm->portMode != sm->portControl &&
391 		 !(sm->initialize || !sm->eap_if->portEnabled))
392 		SM_ENTER_GLOBAL(AUTH_PAE, FORCE_UNAUTH);
393 	else {
394 		switch (sm->auth_pae_state) {
395 		case AUTH_PAE_INITIALIZE:
396 			SM_ENTER(AUTH_PAE, DISCONNECTED);
397 			break;
398 		case AUTH_PAE_DISCONNECTED:
399 			SM_ENTER(AUTH_PAE, RESTART);
400 			break;
401 		case AUTH_PAE_RESTART:
402 			if (!sm->eap_if->eapRestart)
403 				SM_ENTER(AUTH_PAE, CONNECTING);
404 			break;
405 		case AUTH_PAE_HELD:
406 			if (sm->quietWhile == 0)
407 				SM_ENTER(AUTH_PAE, RESTART);
408 			break;
409 		case AUTH_PAE_CONNECTING:
410 			if (sm->eapolLogoff || sm->reAuthCount > sm->reAuthMax)
411 				SM_ENTER(AUTH_PAE, DISCONNECTED);
412 			else if ((sm->eap_if->eapReq &&
413 				  sm->reAuthCount <= sm->reAuthMax) ||
414 				 sm->eap_if->eapSuccess || sm->eap_if->eapFail)
415 				SM_ENTER(AUTH_PAE, AUTHENTICATING);
416 			break;
417 		case AUTH_PAE_AUTHENTICATED:
418 			if (sm->eapolStart || sm->reAuthenticate)
419 				SM_ENTER(AUTH_PAE, RESTART);
420 			else if (sm->eapolLogoff || !sm->portValid)
421 				SM_ENTER(AUTH_PAE, DISCONNECTED);
422 			break;
423 		case AUTH_PAE_AUTHENTICATING:
424 			if (sm->authSuccess && sm->portValid)
425 				SM_ENTER(AUTH_PAE, AUTHENTICATED);
426 			else if (sm->authFail ||
427 				 (sm->keyDone && !sm->portValid))
428 				SM_ENTER(AUTH_PAE, HELD);
429 			else if (sm->eapolStart || sm->eapolLogoff ||
430 				 sm->authTimeout)
431 				SM_ENTER(AUTH_PAE, ABORTING);
432 			break;
433 		case AUTH_PAE_ABORTING:
434 			if (sm->eapolLogoff && !sm->authAbort)
435 				SM_ENTER(AUTH_PAE, DISCONNECTED);
436 			else if (!sm->eapolLogoff && !sm->authAbort)
437 				SM_ENTER(AUTH_PAE, RESTART);
438 			break;
439 		case AUTH_PAE_FORCE_AUTH:
440 			if (sm->eapolStart)
441 				SM_ENTER(AUTH_PAE, FORCE_AUTH);
442 			break;
443 		case AUTH_PAE_FORCE_UNAUTH:
444 			if (sm->eapolStart)
445 				SM_ENTER(AUTH_PAE, FORCE_UNAUTH);
446 			break;
447 		}
448 	}
449 }
450 
451 
452 
453 /* Backend Authentication state machine */
454 
SM_STATE(BE_AUTH,INITIALIZE)455 SM_STATE(BE_AUTH, INITIALIZE)
456 {
457 	SM_ENTRY_MA(BE_AUTH, INITIALIZE, be_auth);
458 
459 	abortAuth();
460 	sm->eap_if->eapNoReq = FALSE;
461 	sm->authAbort = FALSE;
462 }
463 
464 
SM_STATE(BE_AUTH,REQUEST)465 SM_STATE(BE_AUTH, REQUEST)
466 {
467 	SM_ENTRY_MA(BE_AUTH, REQUEST, be_auth);
468 
469 	txReq();
470 	sm->eap_if->eapReq = FALSE;
471 	sm->backendOtherRequestsToSupplicant++;
472 
473 	/*
474 	 * Clearing eapolEap here is not specified in IEEE Std 802.1X-2004, but
475 	 * it looks like this would be logical thing to do there since the old
476 	 * EAP response would not be valid anymore after the new EAP request
477 	 * was sent out.
478 	 *
479 	 * A race condition has been reported, in which hostapd ended up
480 	 * sending out EAP-Response/Identity as a response to the first
481 	 * EAP-Request from the main EAP method. This can be avoided by
482 	 * clearing eapolEap here.
483 	 */
484 	sm->eapolEap = FALSE;
485 }
486 
487 
SM_STATE(BE_AUTH,RESPONSE)488 SM_STATE(BE_AUTH, RESPONSE)
489 {
490 	SM_ENTRY_MA(BE_AUTH, RESPONSE, be_auth);
491 
492 	sm->authTimeout = FALSE;
493 	sm->eapolEap = FALSE;
494 	sm->eap_if->eapNoReq = FALSE;
495 	sm->aWhile = sm->serverTimeout;
496 	sm->eap_if->eapResp = TRUE;
497 	/* sendRespToServer(); */
498 	sm->backendResponses++;
499 }
500 
501 
SM_STATE(BE_AUTH,SUCCESS)502 SM_STATE(BE_AUTH, SUCCESS)
503 {
504 	SM_ENTRY_MA(BE_AUTH, SUCCESS, be_auth);
505 
506 	txReq();
507 	sm->authSuccess = TRUE;
508 	sm->keyRun = TRUE;
509 }
510 
511 
SM_STATE(BE_AUTH,FAIL)512 SM_STATE(BE_AUTH, FAIL)
513 {
514 	SM_ENTRY_MA(BE_AUTH, FAIL, be_auth);
515 
516 	txReq();
517 	sm->authFail = TRUE;
518 }
519 
520 
SM_STATE(BE_AUTH,TIMEOUT)521 SM_STATE(BE_AUTH, TIMEOUT)
522 {
523 	SM_ENTRY_MA(BE_AUTH, TIMEOUT, be_auth);
524 
525 	sm->authTimeout = TRUE;
526 }
527 
528 
SM_STATE(BE_AUTH,IDLE)529 SM_STATE(BE_AUTH, IDLE)
530 {
531 	SM_ENTRY_MA(BE_AUTH, IDLE, be_auth);
532 
533 	sm->authStart = FALSE;
534 }
535 
536 
SM_STATE(BE_AUTH,IGNORE)537 SM_STATE(BE_AUTH, IGNORE)
538 {
539 	SM_ENTRY_MA(BE_AUTH, IGNORE, be_auth);
540 
541 	sm->eap_if->eapNoReq = FALSE;
542 }
543 
544 
SM_STEP(BE_AUTH)545 SM_STEP(BE_AUTH)
546 {
547 	if (sm->portControl != Auto || sm->initialize || sm->authAbort) {
548 		SM_ENTER_GLOBAL(BE_AUTH, INITIALIZE);
549 		return;
550 	}
551 
552 	switch (sm->be_auth_state) {
553 	case BE_AUTH_INITIALIZE:
554 		SM_ENTER(BE_AUTH, IDLE);
555 		break;
556 	case BE_AUTH_REQUEST:
557 		if (sm->eapolEap)
558 			SM_ENTER(BE_AUTH, RESPONSE);
559 		else if (sm->eap_if->eapReq)
560 			SM_ENTER(BE_AUTH, REQUEST);
561 		else if (sm->eap_if->eapTimeout)
562 			SM_ENTER(BE_AUTH, TIMEOUT);
563 		break;
564 	case BE_AUTH_RESPONSE:
565 		if (sm->eap_if->eapNoReq)
566 			SM_ENTER(BE_AUTH, IGNORE);
567 		if (sm->eap_if->eapReq) {
568 			sm->backendAccessChallenges++;
569 			SM_ENTER(BE_AUTH, REQUEST);
570 		} else if (sm->aWhile == 0)
571 			SM_ENTER(BE_AUTH, TIMEOUT);
572 		else if (sm->eap_if->eapFail) {
573 			sm->backendAuthFails++;
574 			SM_ENTER(BE_AUTH, FAIL);
575 		} else if (sm->eap_if->eapSuccess) {
576 			sm->backendAuthSuccesses++;
577 			SM_ENTER(BE_AUTH, SUCCESS);
578 		}
579 		break;
580 	case BE_AUTH_SUCCESS:
581 		SM_ENTER(BE_AUTH, IDLE);
582 		break;
583 	case BE_AUTH_FAIL:
584 		SM_ENTER(BE_AUTH, IDLE);
585 		break;
586 	case BE_AUTH_TIMEOUT:
587 		SM_ENTER(BE_AUTH, IDLE);
588 		break;
589 	case BE_AUTH_IDLE:
590 		if (sm->eap_if->eapFail && sm->authStart)
591 			SM_ENTER(BE_AUTH, FAIL);
592 		else if (sm->eap_if->eapReq && sm->authStart)
593 			SM_ENTER(BE_AUTH, REQUEST);
594 		else if (sm->eap_if->eapSuccess && sm->authStart)
595 			SM_ENTER(BE_AUTH, SUCCESS);
596 		break;
597 	case BE_AUTH_IGNORE:
598 		if (sm->eapolEap)
599 			SM_ENTER(BE_AUTH, RESPONSE);
600 		else if (sm->eap_if->eapReq)
601 			SM_ENTER(BE_AUTH, REQUEST);
602 		else if (sm->eap_if->eapTimeout)
603 			SM_ENTER(BE_AUTH, TIMEOUT);
604 		break;
605 	}
606 }
607 
608 
609 
610 /* Reauthentication Timer state machine */
611 
SM_STATE(REAUTH_TIMER,INITIALIZE)612 SM_STATE(REAUTH_TIMER, INITIALIZE)
613 {
614 	SM_ENTRY_MA(REAUTH_TIMER, INITIALIZE, reauth_timer);
615 
616 	sm->reAuthWhen = sm->reAuthPeriod;
617 }
618 
619 
SM_STATE(REAUTH_TIMER,REAUTHENTICATE)620 SM_STATE(REAUTH_TIMER, REAUTHENTICATE)
621 {
622 	SM_ENTRY_MA(REAUTH_TIMER, REAUTHENTICATE, reauth_timer);
623 
624 	sm->reAuthenticate = TRUE;
625 	sm->eapol->cb.eapol_event(sm->eapol->conf.ctx, sm->sta,
626 				  EAPOL_AUTH_REAUTHENTICATE);
627 }
628 
629 
SM_STEP(REAUTH_TIMER)630 SM_STEP(REAUTH_TIMER)
631 {
632 	if (sm->portControl != Auto || sm->initialize ||
633 	    sm->authPortStatus == Unauthorized || !sm->reAuthEnabled) {
634 		SM_ENTER_GLOBAL(REAUTH_TIMER, INITIALIZE);
635 		return;
636 	}
637 
638 	switch (sm->reauth_timer_state) {
639 	case REAUTH_TIMER_INITIALIZE:
640 		if (sm->reAuthWhen == 0)
641 			SM_ENTER(REAUTH_TIMER, REAUTHENTICATE);
642 		break;
643 	case REAUTH_TIMER_REAUTHENTICATE:
644 		SM_ENTER(REAUTH_TIMER, INITIALIZE);
645 		break;
646 	}
647 }
648 
649 
650 
651 /* Authenticator Key Transmit state machine */
652 
SM_STATE(AUTH_KEY_TX,NO_KEY_TRANSMIT)653 SM_STATE(AUTH_KEY_TX, NO_KEY_TRANSMIT)
654 {
655 	SM_ENTRY_MA(AUTH_KEY_TX, NO_KEY_TRANSMIT, auth_key_tx);
656 }
657 
658 
SM_STATE(AUTH_KEY_TX,KEY_TRANSMIT)659 SM_STATE(AUTH_KEY_TX, KEY_TRANSMIT)
660 {
661 	SM_ENTRY_MA(AUTH_KEY_TX, KEY_TRANSMIT, auth_key_tx);
662 
663 	txKey();
664 	sm->eap_if->eapKeyAvailable = FALSE;
665 	sm->keyDone = TRUE;
666 }
667 
668 
SM_STEP(AUTH_KEY_TX)669 SM_STEP(AUTH_KEY_TX)
670 {
671 	if (sm->initialize || sm->portControl != Auto) {
672 		SM_ENTER_GLOBAL(AUTH_KEY_TX, NO_KEY_TRANSMIT);
673 		return;
674 	}
675 
676 	switch (sm->auth_key_tx_state) {
677 	case AUTH_KEY_TX_NO_KEY_TRANSMIT:
678 		if (sm->keyTxEnabled && sm->eap_if->eapKeyAvailable &&
679 		    sm->keyRun && !(sm->flags & EAPOL_SM_USES_WPA))
680 			SM_ENTER(AUTH_KEY_TX, KEY_TRANSMIT);
681 		break;
682 	case AUTH_KEY_TX_KEY_TRANSMIT:
683 		if (!sm->keyTxEnabled || !sm->keyRun)
684 			SM_ENTER(AUTH_KEY_TX, NO_KEY_TRANSMIT);
685 		else if (sm->eap_if->eapKeyAvailable)
686 			SM_ENTER(AUTH_KEY_TX, KEY_TRANSMIT);
687 		break;
688 	}
689 }
690 
691 
692 
693 /* Key Receive state machine */
694 
SM_STATE(KEY_RX,NO_KEY_RECEIVE)695 SM_STATE(KEY_RX, NO_KEY_RECEIVE)
696 {
697 	SM_ENTRY_MA(KEY_RX, NO_KEY_RECEIVE, key_rx);
698 }
699 
700 
SM_STATE(KEY_RX,KEY_RECEIVE)701 SM_STATE(KEY_RX, KEY_RECEIVE)
702 {
703 	SM_ENTRY_MA(KEY_RX, KEY_RECEIVE, key_rx);
704 
705 	processKey();
706 	sm->rxKey = FALSE;
707 }
708 
709 
SM_STEP(KEY_RX)710 SM_STEP(KEY_RX)
711 {
712 	if (sm->initialize || !sm->eap_if->portEnabled) {
713 		SM_ENTER_GLOBAL(KEY_RX, NO_KEY_RECEIVE);
714 		return;
715 	}
716 
717 	switch (sm->key_rx_state) {
718 	case KEY_RX_NO_KEY_RECEIVE:
719 		if (sm->rxKey)
720 			SM_ENTER(KEY_RX, KEY_RECEIVE);
721 		break;
722 	case KEY_RX_KEY_RECEIVE:
723 		if (sm->rxKey)
724 			SM_ENTER(KEY_RX, KEY_RECEIVE);
725 		break;
726 	}
727 }
728 
729 
730 
731 /* Controlled Directions state machine */
732 
SM_STATE(CTRL_DIR,FORCE_BOTH)733 SM_STATE(CTRL_DIR, FORCE_BOTH)
734 {
735 	SM_ENTRY_MA(CTRL_DIR, FORCE_BOTH, ctrl_dir);
736 	sm->operControlledDirections = Both;
737 }
738 
739 
SM_STATE(CTRL_DIR,IN_OR_BOTH)740 SM_STATE(CTRL_DIR, IN_OR_BOTH)
741 {
742 	SM_ENTRY_MA(CTRL_DIR, IN_OR_BOTH, ctrl_dir);
743 	sm->operControlledDirections = sm->adminControlledDirections;
744 }
745 
746 
SM_STEP(CTRL_DIR)747 SM_STEP(CTRL_DIR)
748 {
749 	if (sm->initialize) {
750 		SM_ENTER_GLOBAL(CTRL_DIR, IN_OR_BOTH);
751 		return;
752 	}
753 
754 	switch (sm->ctrl_dir_state) {
755 	case CTRL_DIR_FORCE_BOTH:
756 		if (sm->eap_if->portEnabled && sm->operEdge)
757 			SM_ENTER(CTRL_DIR, IN_OR_BOTH);
758 		break;
759 	case CTRL_DIR_IN_OR_BOTH:
760 		if (sm->operControlledDirections !=
761 		    sm->adminControlledDirections)
762 			SM_ENTER(CTRL_DIR, IN_OR_BOTH);
763 		if (!sm->eap_if->portEnabled || !sm->operEdge)
764 			SM_ENTER(CTRL_DIR, FORCE_BOTH);
765 		break;
766 	}
767 }
768 
769 
770 
771 struct eapol_state_machine *
eapol_auth_alloc(struct eapol_authenticator * eapol,const u8 * addr,int flags,const struct wpabuf * assoc_wps_ie,const struct wpabuf * assoc_p2p_ie,void * sta_ctx,const char * identity,const char * radius_cui)772 eapol_auth_alloc(struct eapol_authenticator *eapol, const u8 *addr,
773 		 int flags, const struct wpabuf *assoc_wps_ie,
774 		 const struct wpabuf *assoc_p2p_ie, void *sta_ctx,
775 		 const char *identity, const char *radius_cui)
776 {
777 	struct eapol_state_machine *sm;
778 	struct eap_config eap_conf;
779 
780 	if (eapol == NULL)
781 		return NULL;
782 
783 	sm = os_zalloc(sizeof(*sm));
784 	if (sm == NULL) {
785 		wpa_printf(MSG_DEBUG, "IEEE 802.1X state machine allocation "
786 			   "failed");
787 		return NULL;
788 	}
789 	sm->radius_identifier = -1;
790 	os_memcpy(sm->addr, addr, ETH_ALEN);
791 	sm->flags = flags;
792 
793 	sm->eapol = eapol;
794 	sm->sta = sta_ctx;
795 
796 	/* Set default values for state machine constants */
797 	sm->auth_pae_state = AUTH_PAE_INITIALIZE;
798 	sm->quietPeriod = AUTH_PAE_DEFAULT_quietPeriod;
799 	sm->reAuthMax = AUTH_PAE_DEFAULT_reAuthMax;
800 
801 	sm->be_auth_state = BE_AUTH_INITIALIZE;
802 	sm->serverTimeout = BE_AUTH_DEFAULT_serverTimeout;
803 
804 	sm->reauth_timer_state = REAUTH_TIMER_INITIALIZE;
805 	sm->reAuthPeriod = eapol->conf.eap_reauth_period;
806 	sm->reAuthEnabled = eapol->conf.eap_reauth_period > 0 ? TRUE : FALSE;
807 
808 	sm->auth_key_tx_state = AUTH_KEY_TX_NO_KEY_TRANSMIT;
809 
810 	sm->key_rx_state = KEY_RX_NO_KEY_RECEIVE;
811 
812 	sm->ctrl_dir_state = CTRL_DIR_IN_OR_BOTH;
813 
814 	sm->portControl = Auto;
815 
816 	if (!eapol->conf.wpa &&
817 	    (eapol->default_wep_key || eapol->conf.individual_wep_key_len > 0))
818 		sm->keyTxEnabled = TRUE;
819 	else
820 		sm->keyTxEnabled = FALSE;
821 	if (eapol->conf.wpa)
822 		sm->portValid = FALSE;
823 	else
824 		sm->portValid = TRUE;
825 
826 	os_memset(&eap_conf, 0, sizeof(eap_conf));
827 	eap_conf.eap_server = eapol->conf.eap_server;
828 	eap_conf.ssl_ctx = eapol->conf.ssl_ctx;
829 	eap_conf.msg_ctx = eapol->conf.msg_ctx;
830 	eap_conf.eap_sim_db_priv = eapol->conf.eap_sim_db_priv;
831 	eap_conf.pac_opaque_encr_key = eapol->conf.pac_opaque_encr_key;
832 	eap_conf.eap_fast_a_id = eapol->conf.eap_fast_a_id;
833 	eap_conf.eap_fast_a_id_len = eapol->conf.eap_fast_a_id_len;
834 	eap_conf.eap_fast_a_id_info = eapol->conf.eap_fast_a_id_info;
835 	eap_conf.eap_fast_prov = eapol->conf.eap_fast_prov;
836 	eap_conf.pac_key_lifetime = eapol->conf.pac_key_lifetime;
837 	eap_conf.pac_key_refresh_time = eapol->conf.pac_key_refresh_time;
838 	eap_conf.eap_sim_aka_result_ind = eapol->conf.eap_sim_aka_result_ind;
839 	eap_conf.tnc = eapol->conf.tnc;
840 	eap_conf.wps = eapol->conf.wps;
841 	eap_conf.assoc_wps_ie = assoc_wps_ie;
842 	eap_conf.assoc_p2p_ie = assoc_p2p_ie;
843 	eap_conf.peer_addr = addr;
844 	eap_conf.fragment_size = eapol->conf.fragment_size;
845 	eap_conf.pwd_group = eapol->conf.pwd_group;
846 	eap_conf.pbc_in_m1 = eapol->conf.pbc_in_m1;
847 	eap_conf.server_id = eapol->conf.server_id;
848 	eap_conf.server_id_len = eapol->conf.server_id_len;
849 	eap_conf.erp = eapol->conf.erp;
850 	eap_conf.tls_session_lifetime = eapol->conf.tls_session_lifetime;
851 	sm->eap = eap_server_sm_init(sm, &eapol_cb, &eap_conf);
852 	if (sm->eap == NULL) {
853 		eapol_auth_free(sm);
854 		return NULL;
855 	}
856 	sm->eap_if = eap_get_interface(sm->eap);
857 
858 	eapol_auth_initialize(sm);
859 
860 	if (identity) {
861 		sm->identity = (u8 *) os_strdup(identity);
862 		if (sm->identity)
863 			sm->identity_len = os_strlen(identity);
864 	}
865 	if (radius_cui)
866 		sm->radius_cui = wpabuf_alloc_copy(radius_cui,
867 						   os_strlen(radius_cui));
868 
869 #ifndef CONFIG_NO_RADIUS
870 	if (radius_gen_session_id((u8 *) &sm->acct_multi_session_id,
871 				  sizeof(sm->acct_multi_session_id)) < 0) {
872 		eapol_auth_free(sm);
873 		return NULL;
874 	}
875 #endif /* CONFIG_NO_RADIUS */
876 
877 	return sm;
878 }
879 
880 
eapol_auth_free(struct eapol_state_machine * sm)881 void eapol_auth_free(struct eapol_state_machine *sm)
882 {
883 	if (sm == NULL)
884 		return;
885 
886 	eloop_cancel_timeout(eapol_port_timers_tick, NULL, sm);
887 	eloop_cancel_timeout(eapol_sm_step_cb, sm, NULL);
888 	if (sm->eap)
889 		eap_server_sm_deinit(sm->eap);
890 
891 	wpabuf_free(sm->radius_cui);
892 	os_free(sm->identity);
893 	os_free(sm);
894 }
895 
896 
eapol_sm_sta_entry_alive(struct eapol_authenticator * eapol,const u8 * addr)897 static int eapol_sm_sta_entry_alive(struct eapol_authenticator *eapol,
898 				    const u8 *addr)
899 {
900 	return eapol->cb.sta_entry_alive(eapol->conf.ctx, addr);
901 }
902 
903 
eapol_sm_step_run(struct eapol_state_machine * sm)904 static void eapol_sm_step_run(struct eapol_state_machine *sm)
905 {
906 	struct eapol_authenticator *eapol = sm->eapol;
907 	u8 addr[ETH_ALEN];
908 	unsigned int prev_auth_pae, prev_be_auth, prev_reauth_timer,
909 		prev_auth_key_tx, prev_key_rx, prev_ctrl_dir;
910 	int max_steps = 100;
911 
912 	os_memcpy(addr, sm->addr, ETH_ALEN);
913 
914 	/*
915 	 * Allow EAPOL state machines to run as long as there are state
916 	 * changes, but exit and return here through event loop if more than
917 	 * 100 steps is needed as a precaution against infinite loops inside
918 	 * eloop callback.
919 	 */
920 restart:
921 	prev_auth_pae = sm->auth_pae_state;
922 	prev_be_auth = sm->be_auth_state;
923 	prev_reauth_timer = sm->reauth_timer_state;
924 	prev_auth_key_tx = sm->auth_key_tx_state;
925 	prev_key_rx = sm->key_rx_state;
926 	prev_ctrl_dir = sm->ctrl_dir_state;
927 
928 	SM_STEP_RUN(AUTH_PAE);
929 	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
930 		SM_STEP_RUN(BE_AUTH);
931 	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
932 		SM_STEP_RUN(REAUTH_TIMER);
933 	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
934 		SM_STEP_RUN(AUTH_KEY_TX);
935 	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
936 		SM_STEP_RUN(KEY_RX);
937 	if (sm->initializing || eapol_sm_sta_entry_alive(eapol, addr))
938 		SM_STEP_RUN(CTRL_DIR);
939 
940 	if (prev_auth_pae != sm->auth_pae_state ||
941 	    prev_be_auth != sm->be_auth_state ||
942 	    prev_reauth_timer != sm->reauth_timer_state ||
943 	    prev_auth_key_tx != sm->auth_key_tx_state ||
944 	    prev_key_rx != sm->key_rx_state ||
945 	    prev_ctrl_dir != sm->ctrl_dir_state) {
946 		if (--max_steps > 0)
947 			goto restart;
948 		/* Re-run from eloop timeout */
949 		eapol_auth_step(sm);
950 		return;
951 	}
952 
953 	if (eapol_sm_sta_entry_alive(eapol, addr) && sm->eap) {
954 		if (eap_server_sm_step(sm->eap)) {
955 			if (--max_steps > 0)
956 				goto restart;
957 			/* Re-run from eloop timeout */
958 			eapol_auth_step(sm);
959 			return;
960 		}
961 
962 		/* TODO: find a better location for this */
963 		if (sm->eap_if->aaaEapResp) {
964 			sm->eap_if->aaaEapResp = FALSE;
965 			if (sm->eap_if->aaaEapRespData == NULL) {
966 				wpa_printf(MSG_DEBUG, "EAPOL: aaaEapResp set, "
967 					   "but no aaaEapRespData available");
968 				return;
969 			}
970 			sm->eapol->cb.aaa_send(
971 				sm->eapol->conf.ctx, sm->sta,
972 				wpabuf_head(sm->eap_if->aaaEapRespData),
973 				wpabuf_len(sm->eap_if->aaaEapRespData));
974 		}
975 	}
976 
977 	if (eapol_sm_sta_entry_alive(eapol, addr))
978 		sm->eapol->cb.eapol_event(sm->eapol->conf.ctx, sm->sta,
979 					  EAPOL_AUTH_SM_CHANGE);
980 }
981 
982 
eapol_sm_step_cb(void * eloop_ctx,void * timeout_ctx)983 static void eapol_sm_step_cb(void *eloop_ctx, void *timeout_ctx)
984 {
985 	struct eapol_state_machine *sm = eloop_ctx;
986 	eapol_sm_step_run(sm);
987 }
988 
989 
990 /**
991  * eapol_auth_step - Advance EAPOL state machines
992  * @sm: EAPOL state machine
993  *
994  * This function is called to advance EAPOL state machines after any change
995  * that could affect their state.
996  */
eapol_auth_step(struct eapol_state_machine * sm)997 void eapol_auth_step(struct eapol_state_machine *sm)
998 {
999 	/*
1000 	 * Run eapol_sm_step_run from a registered timeout to make sure that
1001 	 * other possible timeouts/events are processed and to avoid long
1002 	 * function call chains.
1003 	 */
1004 
1005 	eloop_register_timeout(0, 0, eapol_sm_step_cb, sm, NULL);
1006 }
1007 
1008 
eapol_auth_initialize(struct eapol_state_machine * sm)1009 static void eapol_auth_initialize(struct eapol_state_machine *sm)
1010 {
1011 	sm->initializing = TRUE;
1012 	/* Initialize the state machines by asserting initialize and then
1013 	 * deasserting it after one step */
1014 	sm->initialize = TRUE;
1015 	eapol_sm_step_run(sm);
1016 	sm->initialize = FALSE;
1017 	eapol_sm_step_run(sm);
1018 	sm->initializing = FALSE;
1019 
1020 	/* Start one second tick for port timers state machine */
1021 	eloop_cancel_timeout(eapol_port_timers_tick, NULL, sm);
1022 	eloop_register_timeout(1, 0, eapol_port_timers_tick, NULL, sm);
1023 }
1024 
1025 
eapol_sm_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)1026 static int eapol_sm_get_eap_user(void *ctx, const u8 *identity,
1027 				 size_t identity_len, int phase2,
1028 				 struct eap_user *user)
1029 {
1030 	struct eapol_state_machine *sm = ctx;
1031 	int ret;
1032 
1033 	ret = sm->eapol->cb.get_eap_user(sm->eapol->conf.ctx, identity,
1034 					 identity_len, phase2, user);
1035 	if (user->remediation)
1036 		sm->remediation = 1;
1037 	return ret;
1038 }
1039 
1040 
eapol_sm_get_eap_req_id_text(void * ctx,size_t * len)1041 static const char * eapol_sm_get_eap_req_id_text(void *ctx, size_t *len)
1042 {
1043 	struct eapol_state_machine *sm = ctx;
1044 	*len = sm->eapol->conf.eap_req_id_text_len;
1045 	return sm->eapol->conf.eap_req_id_text;
1046 }
1047 
1048 
eapol_sm_get_erp_send_reauth_start(void * ctx)1049 static int eapol_sm_get_erp_send_reauth_start(void *ctx)
1050 {
1051 	struct eapol_state_machine *sm = ctx;
1052 	return sm->eapol->conf.erp_send_reauth_start;
1053 }
1054 
1055 
eapol_sm_get_erp_domain(void * ctx)1056 static const char * eapol_sm_get_erp_domain(void *ctx)
1057 {
1058 	struct eapol_state_machine *sm = ctx;
1059 	return sm->eapol->conf.erp_domain;
1060 }
1061 
1062 
eapol_sm_erp_get_key(void * ctx,const char * keyname)1063 static struct eap_server_erp_key * eapol_sm_erp_get_key(void *ctx,
1064 							const char *keyname)
1065 {
1066 	struct eapol_state_machine *sm = ctx;
1067 	return sm->eapol->cb.erp_get_key(sm->eapol->conf.ctx, keyname);
1068 }
1069 
1070 
eapol_sm_erp_add_key(void * ctx,struct eap_server_erp_key * erp)1071 static int eapol_sm_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
1072 {
1073 	struct eapol_state_machine *sm = ctx;
1074 	return sm->eapol->cb.erp_add_key(sm->eapol->conf.ctx, erp);
1075 }
1076 
1077 
1078 static const struct eapol_callbacks eapol_cb =
1079 {
1080 	eapol_sm_get_eap_user,
1081 	eapol_sm_get_eap_req_id_text,
1082 	NULL,
1083 	eapol_sm_get_erp_send_reauth_start,
1084 	eapol_sm_get_erp_domain,
1085 	eapol_sm_erp_get_key,
1086 	eapol_sm_erp_add_key,
1087 };
1088 
1089 
eapol_auth_eap_pending_cb(struct eapol_state_machine * sm,void * ctx)1090 int eapol_auth_eap_pending_cb(struct eapol_state_machine *sm, void *ctx)
1091 {
1092 	if (sm == NULL || ctx == NULL || ctx != sm->eap)
1093 		return -1;
1094 
1095 	eap_sm_pending_cb(sm->eap);
1096 	eapol_auth_step(sm);
1097 
1098 	return 0;
1099 }
1100 
1101 
eapol_auth_reauthenticate(struct eapol_state_machine * sm)1102 void eapol_auth_reauthenticate(struct eapol_state_machine *sm)
1103 {
1104 	wpa_printf(MSG_DEBUG, "EAPOL: External reauthentication trigger for "
1105 		   MACSTR, MAC2STR(sm->addr));
1106 	sm->reAuthenticate = TRUE;
1107 	eapol_auth_step(sm);
1108 }
1109 
1110 
eapol_auth_set_conf(struct eapol_state_machine * sm,const char * param,const char * value)1111 int eapol_auth_set_conf(struct eapol_state_machine *sm, const char *param,
1112 			const char *value)
1113 {
1114 	wpa_printf(MSG_DEBUG, "EAPOL: External configuration operation for "
1115 		   MACSTR " - param=%s value=%s",
1116 		   MAC2STR(sm->addr), param, value);
1117 
1118 	if (os_strcasecmp(param, "AdminControlledDirections") == 0) {
1119 		if (os_strcmp(value, "Both") == 0)
1120 			sm->adminControlledDirections = Both;
1121 		else if (os_strcmp(value, "In") == 0)
1122 			sm->adminControlledDirections = In;
1123 		else
1124 			return -1;
1125 		eapol_auth_step(sm);
1126 		return 0;
1127 	}
1128 
1129 	if (os_strcasecmp(param, "AdminControlledPortControl") == 0) {
1130 		if (os_strcmp(value, "ForceAuthorized") == 0)
1131 			sm->portControl = ForceAuthorized;
1132 		else if (os_strcmp(value, "ForceUnauthorized") == 0)
1133 			sm->portControl = ForceUnauthorized;
1134 		else if (os_strcmp(value, "Auto") == 0)
1135 			sm->portControl = Auto;
1136 		else
1137 			return -1;
1138 		eapol_auth_step(sm);
1139 		return 0;
1140 	}
1141 
1142 	if (os_strcasecmp(param, "quietPeriod") == 0) {
1143 		sm->quietPeriod = atoi(value);
1144 		return 0;
1145 	}
1146 
1147 	if (os_strcasecmp(param, "serverTimeout") == 0) {
1148 		sm->serverTimeout = atoi(value);
1149 		return 0;
1150 	}
1151 
1152 	if (os_strcasecmp(param, "reAuthPeriod") == 0) {
1153 		sm->reAuthPeriod = atoi(value);
1154 		return 0;
1155 	}
1156 
1157 	if (os_strcasecmp(param, "reAuthEnabled") == 0) {
1158 		if (os_strcmp(value, "TRUE") == 0)
1159 			sm->reAuthEnabled = TRUE;
1160 		else if (os_strcmp(value, "FALSE") == 0)
1161 			sm->reAuthEnabled = FALSE;
1162 		else
1163 			return -1;
1164 		eapol_auth_step(sm);
1165 		return 0;
1166 	}
1167 
1168 	if (os_strcasecmp(param, "KeyTransmissionEnabled") == 0) {
1169 		if (os_strcmp(value, "TRUE") == 0)
1170 			sm->keyTxEnabled = TRUE;
1171 		else if (os_strcmp(value, "FALSE") == 0)
1172 			sm->keyTxEnabled = FALSE;
1173 		else
1174 			return -1;
1175 		eapol_auth_step(sm);
1176 		return 0;
1177 	}
1178 
1179 	return -1;
1180 }
1181 
1182 
eapol_auth_conf_clone(struct eapol_auth_config * dst,struct eapol_auth_config * src)1183 static int eapol_auth_conf_clone(struct eapol_auth_config *dst,
1184 				 struct eapol_auth_config *src)
1185 {
1186 	dst->ctx = src->ctx;
1187 	dst->eap_reauth_period = src->eap_reauth_period;
1188 	dst->wpa = src->wpa;
1189 	dst->individual_wep_key_len = src->individual_wep_key_len;
1190 	dst->eap_server = src->eap_server;
1191 	dst->ssl_ctx = src->ssl_ctx;
1192 	dst->msg_ctx = src->msg_ctx;
1193 	dst->eap_sim_db_priv = src->eap_sim_db_priv;
1194 	os_free(dst->eap_req_id_text);
1195 	dst->pwd_group = src->pwd_group;
1196 	dst->pbc_in_m1 = src->pbc_in_m1;
1197 	dst->server_id = src->server_id;
1198 	dst->server_id_len = src->server_id_len;
1199 	if (src->eap_req_id_text) {
1200 		dst->eap_req_id_text = os_malloc(src->eap_req_id_text_len);
1201 		if (dst->eap_req_id_text == NULL)
1202 			return -1;
1203 		os_memcpy(dst->eap_req_id_text, src->eap_req_id_text,
1204 			  src->eap_req_id_text_len);
1205 		dst->eap_req_id_text_len = src->eap_req_id_text_len;
1206 	} else {
1207 		dst->eap_req_id_text = NULL;
1208 		dst->eap_req_id_text_len = 0;
1209 	}
1210 	if (src->pac_opaque_encr_key) {
1211 		dst->pac_opaque_encr_key = os_malloc(16);
1212 		if (dst->pac_opaque_encr_key == NULL)
1213 			goto fail;
1214 		os_memcpy(dst->pac_opaque_encr_key, src->pac_opaque_encr_key,
1215 			  16);
1216 	} else
1217 		dst->pac_opaque_encr_key = NULL;
1218 	if (src->eap_fast_a_id) {
1219 		dst->eap_fast_a_id = os_malloc(src->eap_fast_a_id_len);
1220 		if (dst->eap_fast_a_id == NULL)
1221 			goto fail;
1222 		os_memcpy(dst->eap_fast_a_id, src->eap_fast_a_id,
1223 			  src->eap_fast_a_id_len);
1224 		dst->eap_fast_a_id_len = src->eap_fast_a_id_len;
1225 	} else
1226 		dst->eap_fast_a_id = NULL;
1227 	if (src->eap_fast_a_id_info) {
1228 		dst->eap_fast_a_id_info = os_strdup(src->eap_fast_a_id_info);
1229 		if (dst->eap_fast_a_id_info == NULL)
1230 			goto fail;
1231 	} else
1232 		dst->eap_fast_a_id_info = NULL;
1233 	dst->eap_fast_prov = src->eap_fast_prov;
1234 	dst->pac_key_lifetime = src->pac_key_lifetime;
1235 	dst->pac_key_refresh_time = src->pac_key_refresh_time;
1236 	dst->eap_sim_aka_result_ind = src->eap_sim_aka_result_ind;
1237 	dst->tnc = src->tnc;
1238 	dst->wps = src->wps;
1239 	dst->fragment_size = src->fragment_size;
1240 
1241 	os_free(dst->erp_domain);
1242 	if (src->erp_domain) {
1243 		dst->erp_domain = os_strdup(src->erp_domain);
1244 		if (dst->erp_domain == NULL)
1245 			goto fail;
1246 	} else {
1247 		dst->erp_domain = NULL;
1248 	}
1249 	dst->erp_send_reauth_start = src->erp_send_reauth_start;
1250 	dst->erp = src->erp;
1251 	dst->tls_session_lifetime = src->tls_session_lifetime;
1252 
1253 	return 0;
1254 
1255 fail:
1256 	eapol_auth_conf_free(dst);
1257 	return -1;
1258 }
1259 
1260 
eapol_auth_conf_free(struct eapol_auth_config * conf)1261 static void eapol_auth_conf_free(struct eapol_auth_config *conf)
1262 {
1263 	os_free(conf->eap_req_id_text);
1264 	conf->eap_req_id_text = NULL;
1265 	os_free(conf->pac_opaque_encr_key);
1266 	conf->pac_opaque_encr_key = NULL;
1267 	os_free(conf->eap_fast_a_id);
1268 	conf->eap_fast_a_id = NULL;
1269 	os_free(conf->eap_fast_a_id_info);
1270 	conf->eap_fast_a_id_info = NULL;
1271 	os_free(conf->erp_domain);
1272 	conf->erp_domain = NULL;
1273 }
1274 
1275 
eapol_auth_init(struct eapol_auth_config * conf,struct eapol_auth_cb * cb)1276 struct eapol_authenticator * eapol_auth_init(struct eapol_auth_config *conf,
1277 					     struct eapol_auth_cb *cb)
1278 {
1279 	struct eapol_authenticator *eapol;
1280 
1281 	eapol = os_zalloc(sizeof(*eapol));
1282 	if (eapol == NULL)
1283 		return NULL;
1284 
1285 	if (eapol_auth_conf_clone(&eapol->conf, conf) < 0) {
1286 		os_free(eapol);
1287 		return NULL;
1288 	}
1289 
1290 	if (conf->individual_wep_key_len > 0) {
1291 		/* use key0 in individual key and key1 in broadcast key */
1292 		eapol->default_wep_key_idx = 1;
1293 	}
1294 
1295 	eapol->cb.eapol_send = cb->eapol_send;
1296 	eapol->cb.aaa_send = cb->aaa_send;
1297 	eapol->cb.finished = cb->finished;
1298 	eapol->cb.get_eap_user = cb->get_eap_user;
1299 	eapol->cb.sta_entry_alive = cb->sta_entry_alive;
1300 	eapol->cb.logger = cb->logger;
1301 	eapol->cb.set_port_authorized = cb->set_port_authorized;
1302 	eapol->cb.abort_auth = cb->abort_auth;
1303 	eapol->cb.tx_key = cb->tx_key;
1304 	eapol->cb.eapol_event = cb->eapol_event;
1305 	eapol->cb.erp_get_key = cb->erp_get_key;
1306 	eapol->cb.erp_add_key = cb->erp_add_key;
1307 
1308 	return eapol;
1309 }
1310 
1311 
eapol_auth_deinit(struct eapol_authenticator * eapol)1312 void eapol_auth_deinit(struct eapol_authenticator *eapol)
1313 {
1314 	if (eapol == NULL)
1315 		return;
1316 
1317 	eapol_auth_conf_free(&eapol->conf);
1318 	os_free(eapol->default_wep_key);
1319 	os_free(eapol);
1320 }
1321