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Clear various flags on re-association to allow key_mgmt changes
[thirdparty/hostap.git] / hostapd / wpa.c
1 /*
2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator
3 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
4 *
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.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #ifndef CONFIG_NATIVE_WINDOWS
18
19 #include "common.h"
20 #include "config.h"
21 #include "eapol_sm.h"
22 #include "wpa.h"
23 #include "sha1.h"
24 #include "sha256.h"
25 #include "rc4.h"
26 #include "aes_wrap.h"
27 #include "crypto.h"
28 #include "eloop.h"
29 #include "ieee802_11.h"
30 #include "pmksa_cache.h"
31 #include "state_machine.h"
32 #include "wpa_auth_i.h"
33 #include "wpa_auth_ie.h"
34
35 #define STATE_MACHINE_DATA struct wpa_state_machine
36 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
37 #define STATE_MACHINE_ADDR sm->addr
38
39
40 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
41 static void wpa_sm_step(struct wpa_state_machine *sm);
42 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
43 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
44 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
45 struct wpa_group *group);
46 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
47
48 /* Default timeouts are 100 ms, but this seems to be a bit too fast for most
49 * WPA Supplicants, so use a bit longer timeout. */
50 static const u32 dot11RSNAConfigGroupUpdateTimeOut = 1000; /* ms */
51 static const u32 dot11RSNAConfigGroupUpdateCount = 3;
52 static const u32 dot11RSNAConfigPairwiseUpdateTimeOut = 1000; /* ms */
53 static const u32 dot11RSNAConfigPairwiseUpdateCount = 3;
54
55 /* TODO: make these configurable */
56 static const int dot11RSNAConfigPMKLifetime = 43200;
57 static const int dot11RSNAConfigPMKReauthThreshold = 70;
58 static const int dot11RSNAConfigSATimeout = 60;
59
60
61 static inline void wpa_auth_mic_failure_report(
62 struct wpa_authenticator *wpa_auth, const u8 *addr)
63 {
64 if (wpa_auth->cb.mic_failure_report)
65 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
66 }
67
68
69 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
70 const u8 *addr, wpa_eapol_variable var,
71 int value)
72 {
73 if (wpa_auth->cb.set_eapol)
74 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
75 }
76
77
78 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
79 const u8 *addr, wpa_eapol_variable var)
80 {
81 if (wpa_auth->cb.get_eapol == NULL)
82 return -1;
83 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
84 }
85
86
87 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
88 const u8 *addr, const u8 *prev_psk)
89 {
90 if (wpa_auth->cb.get_psk == NULL)
91 return NULL;
92 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
93 }
94
95
96 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
97 const u8 *addr, u8 *msk, size_t *len)
98 {
99 if (wpa_auth->cb.get_msk == NULL)
100 return -1;
101 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
102 }
103
104
105 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
106 int vlan_id,
107 const char *alg, const u8 *addr, int idx,
108 u8 *key, size_t key_len)
109 {
110 if (wpa_auth->cb.set_key == NULL)
111 return -1;
112 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
113 key, key_len);
114 }
115
116
117 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
118 const u8 *addr, int idx, u8 *seq)
119 {
120 if (wpa_auth->cb.get_seqnum == NULL)
121 return -1;
122 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
123 }
124
125
126 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
127 const u8 *addr, int idx, u8 *seq)
128 {
129 if (wpa_auth->cb.get_seqnum_igtk == NULL)
130 return -1;
131 return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
132 }
133
134
135 static inline int
136 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
137 const u8 *data, size_t data_len, int encrypt)
138 {
139 if (wpa_auth->cb.send_eapol == NULL)
140 return -1;
141 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
142 encrypt);
143 }
144
145
146 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
147 int (*cb)(struct wpa_state_machine *sm, void *ctx),
148 void *cb_ctx)
149 {
150 if (wpa_auth->cb.for_each_sta == NULL)
151 return 0;
152 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
153 }
154
155
156 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
157 int (*cb)(struct wpa_authenticator *a, void *ctx),
158 void *cb_ctx)
159 {
160 if (wpa_auth->cb.for_each_auth == NULL)
161 return 0;
162 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
163 }
164
165
166 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
167 logger_level level, const char *txt)
168 {
169 if (wpa_auth->cb.logger == NULL)
170 return;
171 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
172 }
173
174
175 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
176 logger_level level, const char *fmt, ...)
177 {
178 char *format;
179 int maxlen;
180 va_list ap;
181
182 if (wpa_auth->cb.logger == NULL)
183 return;
184
185 maxlen = os_strlen(fmt) + 100;
186 format = os_malloc(maxlen);
187 if (!format)
188 return;
189
190 va_start(ap, fmt);
191 vsnprintf(format, maxlen, fmt, ap);
192 va_end(ap);
193
194 wpa_auth_logger(wpa_auth, addr, level, format);
195
196 os_free(format);
197 }
198
199
200 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
201 const u8 *addr)
202 {
203 if (wpa_auth->cb.disconnect == NULL)
204 return;
205 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
206 WLAN_REASON_PREV_AUTH_NOT_VALID);
207 }
208
209
210 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
211 {
212 int ret = 0;
213 #ifdef CONFIG_IEEE80211R
214 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
215 ret = 1;
216 #endif /* CONFIG_IEEE80211R */
217 #ifdef CONFIG_IEEE80211W
218 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
219 ret = 1;
220 #endif /* CONFIG_IEEE80211W */
221 return ret;
222 }
223
224
225 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
226 {
227 struct wpa_authenticator *wpa_auth = eloop_ctx;
228
229 if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
230 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
231 "initialization.");
232 } else {
233 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
234 }
235
236 if (wpa_auth->conf.wpa_gmk_rekey) {
237 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
238 wpa_rekey_gmk, wpa_auth, NULL);
239 }
240 }
241
242
243 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
244 {
245 struct wpa_authenticator *wpa_auth = eloop_ctx;
246 struct wpa_group *group;
247
248 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
249 for (group = wpa_auth->group; group; group = group->next) {
250 group->GTKReKey = TRUE;
251 do {
252 group->changed = FALSE;
253 wpa_group_sm_step(wpa_auth, group);
254 } while (group->changed);
255 }
256
257 if (wpa_auth->conf.wpa_group_rekey) {
258 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
259 0, wpa_rekey_gtk, wpa_auth, NULL);
260 }
261 }
262
263
264 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
265 {
266 struct wpa_authenticator *wpa_auth = eloop_ctx;
267 struct wpa_state_machine *sm = timeout_ctx;
268
269 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
270 wpa_request_new_ptk(sm);
271 wpa_sm_step(sm);
272 }
273
274
275 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
276 {
277 if (sm->pmksa == ctx)
278 sm->pmksa = NULL;
279 return 0;
280 }
281
282
283 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
284 void *ctx)
285 {
286 struct wpa_authenticator *wpa_auth = ctx;
287 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
288 }
289
290
291 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
292 int vlan_id)
293 {
294 struct wpa_group *group;
295 u8 buf[ETH_ALEN + 8 + sizeof(group)];
296 u8 rkey[32];
297
298 group = os_zalloc(sizeof(struct wpa_group));
299 if (group == NULL)
300 return NULL;
301
302 group->GTKAuthenticator = TRUE;
303 group->vlan_id = vlan_id;
304
305 switch (wpa_auth->conf.wpa_group) {
306 case WPA_CIPHER_CCMP:
307 group->GTK_len = 16;
308 break;
309 case WPA_CIPHER_TKIP:
310 group->GTK_len = 32;
311 break;
312 case WPA_CIPHER_WEP104:
313 group->GTK_len = 13;
314 break;
315 case WPA_CIPHER_WEP40:
316 group->GTK_len = 5;
317 break;
318 }
319
320 /* Counter = PRF-256(Random number, "Init Counter",
321 * Local MAC Address || Time)
322 */
323 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
324 wpa_get_ntp_timestamp(buf + ETH_ALEN);
325 os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
326 if (os_get_random(rkey, sizeof(rkey)) ||
327 os_get_random(group->GMK, WPA_GMK_LEN)) {
328 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
329 "initialization.");
330 os_free(group);
331 return NULL;
332 }
333
334 sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
335 group->Counter, WPA_NONCE_LEN);
336
337 group->GInit = TRUE;
338 wpa_group_sm_step(wpa_auth, group);
339 group->GInit = FALSE;
340 wpa_group_sm_step(wpa_auth, group);
341
342 return group;
343 }
344
345
346 /**
347 * wpa_init - Initialize WPA authenticator
348 * @addr: Authenticator address
349 * @conf: Configuration for WPA authenticator
350 * Returns: Pointer to WPA authenticator data or %NULL on failure
351 */
352 struct wpa_authenticator * wpa_init(const u8 *addr,
353 struct wpa_auth_config *conf,
354 struct wpa_auth_callbacks *cb)
355 {
356 struct wpa_authenticator *wpa_auth;
357
358 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
359 if (wpa_auth == NULL)
360 return NULL;
361 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
362 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
363 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
364
365 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
366 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
367 os_free(wpa_auth);
368 return NULL;
369 }
370
371 wpa_auth->group = wpa_group_init(wpa_auth, 0);
372 if (wpa_auth->group == NULL) {
373 os_free(wpa_auth->wpa_ie);
374 os_free(wpa_auth);
375 return NULL;
376 }
377
378 wpa_auth->pmksa = pmksa_cache_init(wpa_auth_pmksa_free_cb, wpa_auth);
379 if (wpa_auth->pmksa == NULL) {
380 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
381 os_free(wpa_auth->wpa_ie);
382 os_free(wpa_auth);
383 return NULL;
384 }
385
386 #ifdef CONFIG_IEEE80211R
387 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
388 if (wpa_auth->ft_pmk_cache == NULL) {
389 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
390 os_free(wpa_auth->wpa_ie);
391 pmksa_cache_deinit(wpa_auth->pmksa);
392 os_free(wpa_auth);
393 return NULL;
394 }
395 #endif /* CONFIG_IEEE80211R */
396
397 if (wpa_auth->conf.wpa_gmk_rekey) {
398 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
399 wpa_rekey_gmk, wpa_auth, NULL);
400 }
401
402 if (wpa_auth->conf.wpa_group_rekey) {
403 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
404 wpa_rekey_gtk, wpa_auth, NULL);
405 }
406
407 return wpa_auth;
408 }
409
410
411 /**
412 * wpa_deinit - Deinitialize WPA authenticator
413 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
414 */
415 void wpa_deinit(struct wpa_authenticator *wpa_auth)
416 {
417 struct wpa_group *group, *prev;
418
419 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
420 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
421
422 #ifdef CONFIG_PEERKEY
423 while (wpa_auth->stsl_negotiations)
424 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
425 #endif /* CONFIG_PEERKEY */
426
427 pmksa_cache_deinit(wpa_auth->pmksa);
428
429 #ifdef CONFIG_IEEE80211R
430 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
431 wpa_auth->ft_pmk_cache = NULL;
432 #endif /* CONFIG_IEEE80211R */
433
434 os_free(wpa_auth->wpa_ie);
435
436 group = wpa_auth->group;
437 while (group) {
438 prev = group;
439 group = group->next;
440 os_free(prev);
441 }
442
443 os_free(wpa_auth);
444 }
445
446
447 /**
448 * wpa_reconfig - Update WPA authenticator configuration
449 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
450 * @conf: Configuration for WPA authenticator
451 */
452 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
453 struct wpa_auth_config *conf)
454 {
455 if (wpa_auth == NULL)
456 return 0;
457
458 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
459 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
460 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
461 return -1;
462 }
463
464 return 0;
465 }
466
467
468 struct wpa_state_machine *
469 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
470 {
471 struct wpa_state_machine *sm;
472
473 sm = os_zalloc(sizeof(struct wpa_state_machine));
474 if (sm == NULL)
475 return NULL;
476 os_memcpy(sm->addr, addr, ETH_ALEN);
477
478 sm->wpa_auth = wpa_auth;
479 sm->group = wpa_auth->group;
480
481 return sm;
482 }
483
484
485 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
486 struct wpa_state_machine *sm)
487 {
488 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
489 return;
490
491 #ifdef CONFIG_IEEE80211R
492 if (sm->ft_completed) {
493 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
494 "FT authentication already completed - do not "
495 "start 4-way handshake");
496 return;
497 }
498 #endif /* CONFIG_IEEE80211R */
499
500 if (sm->started) {
501 os_memset(sm->key_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
502 sm->ReAuthenticationRequest = TRUE;
503 wpa_sm_step(sm);
504 return;
505 }
506
507 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
508 "start authentication");
509 sm->started = 1;
510
511 sm->Init = TRUE;
512 wpa_sm_step(sm);
513 sm->Init = FALSE;
514 sm->AuthenticationRequest = TRUE;
515 wpa_sm_step(sm);
516 }
517
518
519 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
520 {
521 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
522 * reassociates back to the same AP while the previous entry for the
523 * STA has not yet been removed. */
524 if (sm == NULL)
525 return;
526
527 sm->wpa_key_mgmt = 0;
528 }
529
530
531 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
532 {
533 os_free(sm->last_rx_eapol_key);
534 os_free(sm->wpa_ie);
535 os_free(sm);
536 }
537
538
539 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
540 {
541 if (sm == NULL)
542 return;
543
544 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
545 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
546 "strict rekeying - force GTK rekey since STA "
547 "is leaving");
548 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
549 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
550 NULL);
551 }
552
553 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
554 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
555 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
556 if (sm->in_step_loop) {
557 /* Must not free state machine while wpa_sm_step() is running.
558 * Freeing will be completed in the end of wpa_sm_step(). */
559 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
560 "machine deinit for " MACSTR, MAC2STR(sm->addr));
561 sm->pending_deinit = 1;
562 } else
563 wpa_free_sta_sm(sm);
564 }
565
566
567 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
568 {
569 if (sm == NULL)
570 return;
571
572 sm->PTKRequest = TRUE;
573 sm->PTK_valid = 0;
574 }
575
576
577 void wpa_receive(struct wpa_authenticator *wpa_auth,
578 struct wpa_state_machine *sm,
579 u8 *data, size_t data_len)
580 {
581 struct ieee802_1x_hdr *hdr;
582 struct wpa_eapol_key *key;
583 u16 key_info, key_data_length;
584 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
585 SMK_M1, SMK_M3, SMK_ERROR } msg;
586 char *msgtxt;
587 struct wpa_eapol_ie_parse kde;
588
589 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
590 return;
591
592 if (data_len < sizeof(*hdr) + sizeof(*key))
593 return;
594
595 hdr = (struct ieee802_1x_hdr *) data;
596 key = (struct wpa_eapol_key *) (hdr + 1);
597 key_info = WPA_GET_BE16(key->key_info);
598 key_data_length = WPA_GET_BE16(key->key_data_length);
599 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
600 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
601 "key_data overflow (%d > %lu)",
602 key_data_length,
603 (unsigned long) (data_len - sizeof(*hdr) -
604 sizeof(*key)));
605 return;
606 }
607
608 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
609 * are set */
610
611 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
612 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
613 if (key_info & WPA_KEY_INFO_ERROR) {
614 msg = SMK_ERROR;
615 msgtxt = "SMK Error";
616 } else {
617 msg = SMK_M1;
618 msgtxt = "SMK M1";
619 }
620 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
621 msg = SMK_M3;
622 msgtxt = "SMK M3";
623 } else if (key_info & WPA_KEY_INFO_REQUEST) {
624 msg = REQUEST;
625 msgtxt = "Request";
626 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
627 msg = GROUP_2;
628 msgtxt = "2/2 Group";
629 } else if (key_data_length == 0) {
630 msg = PAIRWISE_4;
631 msgtxt = "4/4 Pairwise";
632 } else {
633 msg = PAIRWISE_2;
634 msgtxt = "2/4 Pairwise";
635 }
636
637 /* TODO: key_info type validation for PeerKey */
638 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
639 msg == GROUP_2) {
640 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
641 if (sm->pairwise == WPA_CIPHER_CCMP) {
642 if (wpa_use_aes_cmac(sm) &&
643 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
644 wpa_auth_logger(wpa_auth, sm->addr,
645 LOGGER_WARNING,
646 "advertised support for "
647 "AES-128-CMAC, but did not "
648 "use it");
649 return;
650 }
651
652 if (!wpa_use_aes_cmac(sm) &&
653 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
654 wpa_auth_logger(wpa_auth, sm->addr,
655 LOGGER_WARNING,
656 "did not use HMAC-SHA1-AES "
657 "with CCMP");
658 return;
659 }
660 }
661 }
662
663 if (key_info & WPA_KEY_INFO_REQUEST) {
664 if (sm->req_replay_counter_used &&
665 os_memcmp(key->replay_counter, sm->req_replay_counter,
666 WPA_REPLAY_COUNTER_LEN) <= 0) {
667 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
668 "received EAPOL-Key request with "
669 "replayed counter");
670 return;
671 }
672 }
673
674 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
675 (!sm->key_replay_counter_valid ||
676 os_memcmp(key->replay_counter, sm->key_replay_counter,
677 WPA_REPLAY_COUNTER_LEN) != 0)) {
678 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
679 "received EAPOL-Key %s with unexpected "
680 "replay counter", msgtxt);
681 wpa_hexdump(MSG_DEBUG, "expected replay counter",
682 sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
683 wpa_hexdump(MSG_DEBUG, "received replay counter",
684 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
685 return;
686 }
687
688 switch (msg) {
689 case PAIRWISE_2:
690 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
691 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
692 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
693 "received EAPOL-Key msg 2/4 in "
694 "invalid state (%d) - dropped",
695 sm->wpa_ptk_state);
696 return;
697 }
698 if (sm->wpa_ie == NULL ||
699 sm->wpa_ie_len != key_data_length ||
700 os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
701 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
702 "WPA IE from (Re)AssocReq did not "
703 "match with msg 2/4");
704 if (sm->wpa_ie) {
705 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
706 sm->wpa_ie, sm->wpa_ie_len);
707 }
708 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
709 (u8 *) (key + 1), key_data_length);
710 /* MLME-DEAUTHENTICATE.request */
711 wpa_sta_disconnect(wpa_auth, sm->addr);
712 return;
713 }
714 break;
715 case PAIRWISE_4:
716 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
717 !sm->PTK_valid) {
718 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
719 "received EAPOL-Key msg 4/4 in "
720 "invalid state (%d) - dropped",
721 sm->wpa_ptk_state);
722 return;
723 }
724 break;
725 case GROUP_2:
726 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
727 || !sm->PTK_valid) {
728 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
729 "received EAPOL-Key msg 2/2 in "
730 "invalid state (%d) - dropped",
731 sm->wpa_ptk_group_state);
732 return;
733 }
734 break;
735 #ifdef CONFIG_PEERKEY
736 case SMK_M1:
737 case SMK_M3:
738 case SMK_ERROR:
739 if (!wpa_auth->conf.peerkey) {
740 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
741 "PeerKey use disabled - ignoring message");
742 return;
743 }
744 if (!sm->PTK_valid) {
745 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
746 "received EAPOL-Key msg SMK in "
747 "invalid state - dropped");
748 return;
749 }
750 break;
751 #else /* CONFIG_PEERKEY */
752 case SMK_M1:
753 case SMK_M3:
754 case SMK_ERROR:
755 return; /* STSL disabled - ignore SMK messages */
756 #endif /* CONFIG_PEERKEY */
757 case REQUEST:
758 break;
759 }
760
761 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
762 "received EAPOL-Key frame (%s)", msgtxt);
763
764 if (key_info & WPA_KEY_INFO_ACK) {
765 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
766 "received invalid EAPOL-Key: Key Ack set");
767 return;
768 }
769
770 if (!(key_info & WPA_KEY_INFO_MIC)) {
771 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
772 "received invalid EAPOL-Key: Key MIC not set");
773 return;
774 }
775
776 sm->MICVerified = FALSE;
777 if (sm->PTK_valid) {
778 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
779 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
780 "received EAPOL-Key with invalid MIC");
781 return;
782 }
783 sm->MICVerified = TRUE;
784 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
785 }
786
787 if (key_info & WPA_KEY_INFO_REQUEST) {
788 if (sm->MICVerified) {
789 sm->req_replay_counter_used = 1;
790 os_memcpy(sm->req_replay_counter, key->replay_counter,
791 WPA_REPLAY_COUNTER_LEN);
792 } else {
793 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
794 "received EAPOL-Key request with "
795 "invalid MIC");
796 return;
797 }
798
799 /*
800 * TODO: should decrypt key data field if encryption was used;
801 * even though MAC address KDE is not normally encrypted,
802 * supplicant is allowed to encrypt it.
803 */
804 if (msg == SMK_ERROR) {
805 #ifdef CONFIG_PEERKEY
806 wpa_smk_error(wpa_auth, sm, key);
807 #endif /* CONFIG_PEERKEY */
808 return;
809 } else if (key_info & WPA_KEY_INFO_ERROR) {
810 /* Supplicant reported a Michael MIC error */
811 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
812 "received EAPOL-Key Error Request "
813 "(STA detected Michael MIC failure)");
814 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
815 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
816 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
817 /* Error report is not a request for a new key
818 * handshake, but since Authenticator may do it, let's
819 * change the keys now anyway. */
820 wpa_request_new_ptk(sm);
821 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
822 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
823 "received EAPOL-Key Request for new "
824 "4-Way Handshake");
825 wpa_request_new_ptk(sm);
826 #ifdef CONFIG_PEERKEY
827 } else if (msg == SMK_M1) {
828 wpa_smk_m1(wpa_auth, sm, key);
829 #endif /* CONFIG_PEERKEY */
830 } else if (key_data_length > 0 &&
831 wpa_parse_kde_ies((const u8 *) (key + 1),
832 key_data_length, &kde) == 0 &&
833 kde.mac_addr) {
834 } else {
835 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
836 "received EAPOL-Key Request for GTK "
837 "rekeying");
838 /* FIX: why was this triggering PTK rekeying for the
839 * STA that requested Group Key rekeying?? */
840 /* wpa_request_new_ptk(sta->wpa_sm); */
841 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
842 wpa_rekey_gtk(wpa_auth, NULL);
843 }
844 } else {
845 /* Do not allow the same key replay counter to be reused. */
846 sm->key_replay_counter_valid = FALSE;
847 }
848
849 #ifdef CONFIG_PEERKEY
850 if (msg == SMK_M3) {
851 wpa_smk_m3(wpa_auth, sm, key);
852 return;
853 }
854 #endif /* CONFIG_PEERKEY */
855
856 os_free(sm->last_rx_eapol_key);
857 sm->last_rx_eapol_key = os_malloc(data_len);
858 if (sm->last_rx_eapol_key == NULL)
859 return;
860 os_memcpy(sm->last_rx_eapol_key, data, data_len);
861 sm->last_rx_eapol_key_len = data_len;
862
863 sm->EAPOLKeyReceived = TRUE;
864 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
865 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
866 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
867 wpa_sm_step(sm);
868 }
869
870
871 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
872 u8 *gtk, size_t gtk_len)
873 {
874 u8 data[ETH_ALEN + WPA_NONCE_LEN];
875
876 /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
877 os_memcpy(data, addr, ETH_ALEN);
878 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
879
880 #ifdef CONFIG_IEEE80211W
881 sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
882 data, sizeof(data), gtk, gtk_len);
883 #else /* CONFIG_IEEE80211W */
884 sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
885 data, sizeof(data), gtk, gtk_len);
886 #endif /* CONFIG_IEEE80211W */
887
888 wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
889 wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
890 }
891
892
893 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
894 {
895 struct wpa_authenticator *wpa_auth = eloop_ctx;
896 struct wpa_state_machine *sm = timeout_ctx;
897
898 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
899 sm->TimeoutEvt = TRUE;
900 wpa_sm_step(sm);
901 }
902
903
904 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
905 struct wpa_state_machine *sm, int key_info,
906 const u8 *key_rsc, const u8 *nonce,
907 const u8 *kde, size_t kde_len,
908 int keyidx, int encr, int force_version)
909 {
910 struct ieee802_1x_hdr *hdr;
911 struct wpa_eapol_key *key;
912 size_t len;
913 int alg;
914 int key_data_len, pad_len = 0;
915 u8 *buf, *pos;
916 int version, pairwise;
917
918 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
919
920 if (force_version)
921 version = force_version;
922 else if (wpa_use_aes_cmac(sm))
923 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
924 else if (sm->pairwise == WPA_CIPHER_CCMP)
925 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
926 else
927 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
928
929 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
930
931 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
932 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
933 "encr=%d)",
934 version,
935 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
936 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
937 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
938 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
939 pairwise, (unsigned long) kde_len, keyidx, encr);
940
941 key_data_len = kde_len;
942
943 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
944 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
945 pad_len = key_data_len % 8;
946 if (pad_len)
947 pad_len = 8 - pad_len;
948 key_data_len += pad_len + 8;
949 }
950
951 len += key_data_len;
952
953 hdr = os_zalloc(len);
954 if (hdr == NULL)
955 return;
956 hdr->version = wpa_auth->conf.eapol_version;
957 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
958 hdr->length = host_to_be16(len - sizeof(*hdr));
959 key = (struct wpa_eapol_key *) (hdr + 1);
960
961 key->type = sm->wpa == WPA_VERSION_WPA2 ?
962 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
963 key_info |= version;
964 if (encr && sm->wpa == WPA_VERSION_WPA2)
965 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
966 if (sm->wpa != WPA_VERSION_WPA2)
967 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
968 WPA_PUT_BE16(key->key_info, key_info);
969
970 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
971 switch (alg) {
972 case WPA_CIPHER_CCMP:
973 WPA_PUT_BE16(key->key_length, 16);
974 break;
975 case WPA_CIPHER_TKIP:
976 WPA_PUT_BE16(key->key_length, 32);
977 break;
978 case WPA_CIPHER_WEP40:
979 WPA_PUT_BE16(key->key_length, 5);
980 break;
981 case WPA_CIPHER_WEP104:
982 WPA_PUT_BE16(key->key_length, 13);
983 break;
984 }
985 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
986 WPA_PUT_BE16(key->key_length, 0);
987
988 /* FIX: STSL: what to use as key_replay_counter? */
989 inc_byte_array(sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
990 os_memcpy(key->replay_counter, sm->key_replay_counter,
991 WPA_REPLAY_COUNTER_LEN);
992 sm->key_replay_counter_valid = TRUE;
993
994 if (nonce)
995 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
996
997 if (key_rsc)
998 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
999
1000 if (kde && !encr) {
1001 os_memcpy(key + 1, kde, kde_len);
1002 WPA_PUT_BE16(key->key_data_length, kde_len);
1003 } else if (encr && kde) {
1004 buf = os_zalloc(key_data_len);
1005 if (buf == NULL) {
1006 os_free(hdr);
1007 return;
1008 }
1009 pos = buf;
1010 os_memcpy(pos, kde, kde_len);
1011 pos += kde_len;
1012
1013 if (pad_len)
1014 *pos++ = 0xdd;
1015
1016 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1017 buf, key_data_len);
1018 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1019 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1020 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1021 (u8 *) (key + 1))) {
1022 os_free(hdr);
1023 os_free(buf);
1024 return;
1025 }
1026 WPA_PUT_BE16(key->key_data_length, key_data_len);
1027 } else {
1028 u8 ek[32];
1029 os_memcpy(key->key_iv,
1030 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1031 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1032 os_memcpy(ek, key->key_iv, 16);
1033 os_memcpy(ek + 16, sm->PTK.kek, 16);
1034 os_memcpy(key + 1, buf, key_data_len);
1035 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1036 WPA_PUT_BE16(key->key_data_length, key_data_len);
1037 }
1038 os_free(buf);
1039 }
1040
1041 if (key_info & WPA_KEY_INFO_MIC) {
1042 if (!sm->PTK_valid) {
1043 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1044 "PTK not valid when sending EAPOL-Key "
1045 "frame");
1046 os_free(hdr);
1047 return;
1048 }
1049 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1050 key->key_mic);
1051 }
1052
1053 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1054 1);
1055 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1056 sm->pairwise_set);
1057 os_free(hdr);
1058 }
1059
1060
1061 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1062 struct wpa_state_machine *sm, int key_info,
1063 const u8 *key_rsc, const u8 *nonce,
1064 const u8 *kde, size_t kde_len,
1065 int keyidx, int encr)
1066 {
1067 int timeout_ms;
1068 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1069
1070 if (sm == NULL)
1071 return;
1072
1073 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1074 keyidx, encr, 0);
1075
1076 timeout_ms = pairwise ? dot11RSNAConfigPairwiseUpdateTimeOut :
1077 dot11RSNAConfigGroupUpdateTimeOut;
1078 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1079 wpa_send_eapol_timeout, wpa_auth, sm);
1080 }
1081
1082
1083 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1084 {
1085 struct ieee802_1x_hdr *hdr;
1086 struct wpa_eapol_key *key;
1087 u16 key_info;
1088 int ret = 0;
1089 u8 mic[16];
1090
1091 if (data_len < sizeof(*hdr) + sizeof(*key))
1092 return -1;
1093
1094 hdr = (struct ieee802_1x_hdr *) data;
1095 key = (struct wpa_eapol_key *) (hdr + 1);
1096 key_info = WPA_GET_BE16(key->key_info);
1097 os_memcpy(mic, key->key_mic, 16);
1098 os_memset(key->key_mic, 0, 16);
1099 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1100 data, data_len, key->key_mic) ||
1101 os_memcmp(mic, key->key_mic, 16) != 0)
1102 ret = -1;
1103 os_memcpy(key->key_mic, mic, 16);
1104 return ret;
1105 }
1106
1107
1108 void wpa_remove_ptk(struct wpa_state_machine *sm)
1109 {
1110 sm->PTK_valid = FALSE;
1111 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1112 wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1113 sm->pairwise_set = FALSE;
1114 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1115 }
1116
1117
1118 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1119 {
1120 int remove_ptk = 1;
1121
1122 if (sm == NULL)
1123 return;
1124
1125 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1126 "event %d notification", event);
1127
1128 switch (event) {
1129 case WPA_AUTH:
1130 case WPA_ASSOC:
1131 break;
1132 case WPA_DEAUTH:
1133 case WPA_DISASSOC:
1134 sm->DeauthenticationRequest = TRUE;
1135 break;
1136 case WPA_REAUTH:
1137 case WPA_REAUTH_EAPOL:
1138 if (sm->GUpdateStationKeys) {
1139 /*
1140 * Reauthentication cancels the pending group key
1141 * update for this STA.
1142 */
1143 sm->group->GKeyDoneStations--;
1144 sm->GUpdateStationKeys = FALSE;
1145 sm->PtkGroupInit = TRUE;
1146 }
1147 sm->ReAuthenticationRequest = TRUE;
1148 break;
1149 case WPA_ASSOC_FT:
1150 #ifdef CONFIG_IEEE80211R
1151 /* Using FT protocol, not WPA auth state machine */
1152 sm->ft_completed = 1;
1153 return;
1154 #else /* CONFIG_IEEE80211R */
1155 break;
1156 #endif /* CONFIG_IEEE80211R */
1157 }
1158
1159 #ifdef CONFIG_IEEE80211R
1160 sm->ft_completed = 0;
1161 #endif /* CONFIG_IEEE80211R */
1162
1163 #ifdef CONFIG_IEEE80211W
1164 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1165 remove_ptk = 0;
1166 #endif /* CONFIG_IEEE80211W */
1167
1168 if (remove_ptk) {
1169 sm->PTK_valid = FALSE;
1170 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1171
1172 if (event != WPA_REAUTH_EAPOL)
1173 wpa_remove_ptk(sm);
1174 }
1175
1176 wpa_sm_step(sm);
1177 }
1178
1179
1180 static const char * wpa_alg_txt(int alg)
1181 {
1182 switch (alg) {
1183 case WPA_CIPHER_CCMP:
1184 return "CCMP";
1185 case WPA_CIPHER_TKIP:
1186 return "TKIP";
1187 case WPA_CIPHER_WEP104:
1188 case WPA_CIPHER_WEP40:
1189 return "WEP";
1190 default:
1191 return "";
1192 }
1193 }
1194
1195
1196 SM_STATE(WPA_PTK, INITIALIZE)
1197 {
1198 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1199 if (sm->Init) {
1200 /* Init flag is not cleared here, so avoid busy
1201 * loop by claiming nothing changed. */
1202 sm->changed = FALSE;
1203 }
1204
1205 sm->keycount = 0;
1206 if (sm->GUpdateStationKeys)
1207 sm->group->GKeyDoneStations--;
1208 sm->GUpdateStationKeys = FALSE;
1209 if (sm->wpa == WPA_VERSION_WPA)
1210 sm->PInitAKeys = FALSE;
1211 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1212 * Local AA > Remote AA)) */) {
1213 sm->Pair = TRUE;
1214 }
1215 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1216 wpa_remove_ptk(sm);
1217 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1218 sm->TimeoutCtr = 0;
1219 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1220 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1221 WPA_EAPOL_authorized, 0);
1222 }
1223 }
1224
1225
1226 SM_STATE(WPA_PTK, DISCONNECT)
1227 {
1228 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1229 sm->Disconnect = FALSE;
1230 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1231 }
1232
1233
1234 SM_STATE(WPA_PTK, DISCONNECTED)
1235 {
1236 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1237 sm->DeauthenticationRequest = FALSE;
1238 }
1239
1240
1241 SM_STATE(WPA_PTK, AUTHENTICATION)
1242 {
1243 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1244 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1245 sm->PTK_valid = FALSE;
1246 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1247 1);
1248 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1249 sm->AuthenticationRequest = FALSE;
1250 }
1251
1252
1253 SM_STATE(WPA_PTK, AUTHENTICATION2)
1254 {
1255 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1256 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1257 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1258 sm->ReAuthenticationRequest = FALSE;
1259 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1260 * logical place than INITIALIZE since AUTHENTICATION2 can be
1261 * re-entered on ReAuthenticationRequest without going through
1262 * INITIALIZE. */
1263 sm->TimeoutCtr = 0;
1264 }
1265
1266
1267 SM_STATE(WPA_PTK, INITPMK)
1268 {
1269 u8 msk[2 * PMK_LEN];
1270 size_t len = 2 * PMK_LEN;
1271
1272 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1273 #ifdef CONFIG_IEEE80211R
1274 sm->xxkey_len = 0;
1275 #endif /* CONFIG_IEEE80211R */
1276 if (sm->pmksa) {
1277 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1278 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1279 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1280 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1281 "(len=%lu)", (unsigned long) len);
1282 os_memcpy(sm->PMK, msk, PMK_LEN);
1283 #ifdef CONFIG_IEEE80211R
1284 if (len >= 2 * PMK_LEN) {
1285 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1286 sm->xxkey_len = PMK_LEN;
1287 }
1288 #endif /* CONFIG_IEEE80211R */
1289 } else {
1290 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1291 }
1292
1293 sm->req_replay_counter_used = 0;
1294 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1295 * will break reauthentication since EAPOL state machines may not be
1296 * get into AUTHENTICATING state that clears keyRun before WPA state
1297 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1298 * state and takes PMK from the previously used AAA Key. This will
1299 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1300 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1301 * be good workaround for this issue. */
1302 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1303 }
1304
1305
1306 SM_STATE(WPA_PTK, INITPSK)
1307 {
1308 const u8 *psk;
1309 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1310 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1311 if (psk) {
1312 os_memcpy(sm->PMK, psk, PMK_LEN);
1313 #ifdef CONFIG_IEEE80211R
1314 os_memcpy(sm->xxkey, psk, PMK_LEN);
1315 sm->xxkey_len = PMK_LEN;
1316 #endif /* CONFIG_IEEE80211R */
1317 }
1318 sm->req_replay_counter_used = 0;
1319 }
1320
1321
1322 SM_STATE(WPA_PTK, PTKSTART)
1323 {
1324 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1325 size_t pmkid_len = 0;
1326
1327 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1328 sm->PTKRequest = FALSE;
1329 sm->TimeoutEvt = FALSE;
1330 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1331 "sending 1/4 msg of 4-Way Handshake");
1332 /*
1333 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1334 * one possible PSK for this STA.
1335 */
1336 if (sm->wpa == WPA_VERSION_WPA2 &&
1337 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1338 pmkid = buf;
1339 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1340 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1341 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1342 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1343 if (sm->pmksa)
1344 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1345 sm->pmksa->pmkid, PMKID_LEN);
1346 else {
1347 /*
1348 * Calculate PMKID since no PMKSA cache entry was
1349 * available with pre-calculated PMKID.
1350 */
1351 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1352 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1353 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1354 }
1355 }
1356 wpa_send_eapol(sm->wpa_auth, sm,
1357 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1358 sm->ANonce, pmkid, pmkid_len, 0, 0);
1359 sm->TimeoutCtr++;
1360 }
1361
1362
1363 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1364 struct wpa_ptk *ptk)
1365 {
1366 #ifdef CONFIG_IEEE80211R
1367 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1368 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1369 #endif /* CONFIG_IEEE80211R */
1370
1371 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1372 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1373 (u8 *) ptk, sizeof(*ptk),
1374 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1375
1376 return 0;
1377 }
1378
1379
1380 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1381 {
1382 struct wpa_ptk PTK;
1383 int ok = 0;
1384 const u8 *pmk = NULL;
1385
1386 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1387 sm->EAPOLKeyReceived = FALSE;
1388
1389 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1390 * WPA-PSK: iterate through possible PSKs and select the one matching
1391 * the packet */
1392 for (;;) {
1393 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1394 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1395 if (pmk == NULL)
1396 break;
1397 } else
1398 pmk = sm->PMK;
1399
1400 wpa_derive_ptk(sm, pmk, &PTK);
1401
1402 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1403 sm->last_rx_eapol_key_len) == 0) {
1404 ok = 1;
1405 break;
1406 }
1407
1408 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1409 break;
1410 }
1411
1412 if (!ok) {
1413 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1414 "invalid MIC in msg 2/4 of 4-Way Handshake");
1415 return;
1416 }
1417
1418 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1419
1420 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1421 /* PSK may have changed from the previous choice, so update
1422 * state machine data based on whatever PSK was selected here.
1423 */
1424 os_memcpy(sm->PMK, pmk, PMK_LEN);
1425 }
1426
1427 sm->MICVerified = TRUE;
1428
1429 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1430 sm->PTK_valid = TRUE;
1431 }
1432
1433
1434 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1435 {
1436 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1437 sm->TimeoutCtr = 0;
1438 }
1439
1440
1441 #ifdef CONFIG_IEEE80211W
1442
1443 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1444 {
1445 if (sm->mgmt_frame_prot) {
1446 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1447 }
1448
1449 return 0;
1450 }
1451
1452
1453 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1454 {
1455 struct wpa_igtk_kde igtk;
1456 struct wpa_group *gsm = sm->group;
1457
1458 if (!sm->mgmt_frame_prot)
1459 return pos;
1460
1461 igtk.keyid[0] = gsm->GN_igtk;
1462 igtk.keyid[1] = 0;
1463 if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1464 < 0)
1465 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1466 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1467 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1468 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1469
1470 return pos;
1471 }
1472
1473 #else /* CONFIG_IEEE80211W */
1474
1475 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1476 {
1477 return 0;
1478 }
1479
1480
1481 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1482 {
1483 return pos;
1484 }
1485
1486 #endif /* CONFIG_IEEE80211W */
1487
1488
1489 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1490 {
1491 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1492 size_t gtk_len, kde_len;
1493 struct wpa_group *gsm = sm->group;
1494 u8 *wpa_ie;
1495 int wpa_ie_len, secure, keyidx, encr = 0;
1496
1497 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1498 sm->TimeoutEvt = FALSE;
1499 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1500 */
1501 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1502 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1503 wpa_ie = sm->wpa_auth->wpa_ie;
1504 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1505 if (sm->wpa == WPA_VERSION_WPA &&
1506 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1507 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1508 /* WPA-only STA, remove RSN IE */
1509 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1510 wpa_ie_len = wpa_ie[1] + 2;
1511 }
1512 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1513 "sending 3/4 msg of 4-Way Handshake");
1514 if (sm->wpa == WPA_VERSION_WPA2) {
1515 /* WPA2 send GTK in the 4-way handshake */
1516 secure = 1;
1517 gtk = gsm->GTK[gsm->GN - 1];
1518 gtk_len = gsm->GTK_len;
1519 keyidx = gsm->GN;
1520 _rsc = rsc;
1521 encr = 1;
1522 } else {
1523 /* WPA does not include GTK in msg 3/4 */
1524 secure = 0;
1525 gtk = NULL;
1526 gtk_len = 0;
1527 keyidx = 0;
1528 _rsc = NULL;
1529 }
1530
1531 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1532 if (gtk)
1533 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1534 kde = os_malloc(kde_len);
1535 if (kde == NULL)
1536 return;
1537
1538 pos = kde;
1539 os_memcpy(pos, wpa_ie, wpa_ie_len);
1540 pos += wpa_ie_len;
1541 if (gtk) {
1542 u8 hdr[2];
1543 hdr[0] = keyidx & 0x03;
1544 hdr[1] = 0;
1545 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1546 gtk, gtk_len);
1547 }
1548 pos = ieee80211w_kde_add(sm, pos);
1549
1550 wpa_send_eapol(sm->wpa_auth, sm,
1551 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1552 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1553 WPA_KEY_INFO_KEY_TYPE,
1554 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1555 os_free(kde);
1556 sm->TimeoutCtr++;
1557 }
1558
1559
1560 SM_STATE(WPA_PTK, PTKINITDONE)
1561 {
1562 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1563 sm->EAPOLKeyReceived = FALSE;
1564 if (sm->Pair) {
1565 char *alg;
1566 int klen;
1567 if (sm->pairwise == WPA_CIPHER_TKIP) {
1568 alg = "TKIP";
1569 klen = 32;
1570 } else {
1571 alg = "CCMP";
1572 klen = 16;
1573 }
1574 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1575 sm->PTK.tk1, klen)) {
1576 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1577 return;
1578 }
1579 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1580 sm->pairwise_set = TRUE;
1581
1582 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1583 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1584 eloop_register_timeout(sm->wpa_auth->conf.
1585 wpa_ptk_rekey, 0, wpa_rekey_ptk,
1586 sm->wpa_auth, sm);
1587 }
1588
1589 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1590 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1591 WPA_EAPOL_authorized, 1);
1592 }
1593 }
1594
1595 if (0 /* IBSS == TRUE */) {
1596 sm->keycount++;
1597 if (sm->keycount == 2) {
1598 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1599 WPA_EAPOL_portValid, 1);
1600 }
1601 } else {
1602 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1603 1);
1604 }
1605 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1606 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1607 if (sm->wpa == WPA_VERSION_WPA)
1608 sm->PInitAKeys = TRUE;
1609 else
1610 sm->has_GTK = TRUE;
1611 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1612 "pairwise key handshake completed (%s)",
1613 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1614
1615 #ifdef CONFIG_IEEE80211R
1616 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1617 #endif /* CONFIG_IEEE80211R */
1618 }
1619
1620
1621 SM_STEP(WPA_PTK)
1622 {
1623 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1624
1625 if (sm->Init)
1626 SM_ENTER(WPA_PTK, INITIALIZE);
1627 else if (sm->Disconnect
1628 /* || FIX: dot11RSNAConfigSALifetime timeout */)
1629 SM_ENTER(WPA_PTK, DISCONNECT);
1630 else if (sm->DeauthenticationRequest)
1631 SM_ENTER(WPA_PTK, DISCONNECTED);
1632 else if (sm->AuthenticationRequest)
1633 SM_ENTER(WPA_PTK, AUTHENTICATION);
1634 else if (sm->ReAuthenticationRequest)
1635 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1636 else if (sm->PTKRequest)
1637 SM_ENTER(WPA_PTK, PTKSTART);
1638 else switch (sm->wpa_ptk_state) {
1639 case WPA_PTK_INITIALIZE:
1640 break;
1641 case WPA_PTK_DISCONNECT:
1642 SM_ENTER(WPA_PTK, DISCONNECTED);
1643 break;
1644 case WPA_PTK_DISCONNECTED:
1645 SM_ENTER(WPA_PTK, INITIALIZE);
1646 break;
1647 case WPA_PTK_AUTHENTICATION:
1648 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1649 break;
1650 case WPA_PTK_AUTHENTICATION2:
1651 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1652 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1653 WPA_EAPOL_keyRun) > 0)
1654 SM_ENTER(WPA_PTK, INITPMK);
1655 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1656 /* FIX: && 802.1X::keyRun */)
1657 SM_ENTER(WPA_PTK, INITPSK);
1658 break;
1659 case WPA_PTK_INITPMK:
1660 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1661 WPA_EAPOL_keyAvailable) > 0)
1662 SM_ENTER(WPA_PTK, PTKSTART);
1663 else {
1664 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1665 SM_ENTER(WPA_PTK, DISCONNECT);
1666 }
1667 break;
1668 case WPA_PTK_INITPSK:
1669 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1670 SM_ENTER(WPA_PTK, PTKSTART);
1671 else {
1672 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1673 "no PSK configured for the STA");
1674 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1675 SM_ENTER(WPA_PTK, DISCONNECT);
1676 }
1677 break;
1678 case WPA_PTK_PTKSTART:
1679 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1680 sm->EAPOLKeyPairwise)
1681 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1682 else if (sm->TimeoutCtr >
1683 (int) dot11RSNAConfigPairwiseUpdateCount) {
1684 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1685 SM_ENTER(WPA_PTK, DISCONNECT);
1686 } else if (sm->TimeoutEvt)
1687 SM_ENTER(WPA_PTK, PTKSTART);
1688 break;
1689 case WPA_PTK_PTKCALCNEGOTIATING:
1690 if (sm->MICVerified)
1691 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1692 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1693 sm->EAPOLKeyPairwise)
1694 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1695 else if (sm->TimeoutEvt)
1696 SM_ENTER(WPA_PTK, PTKSTART);
1697 break;
1698 case WPA_PTK_PTKCALCNEGOTIATING2:
1699 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1700 break;
1701 case WPA_PTK_PTKINITNEGOTIATING:
1702 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1703 sm->EAPOLKeyPairwise && sm->MICVerified)
1704 SM_ENTER(WPA_PTK, PTKINITDONE);
1705 else if (sm->TimeoutCtr >
1706 (int) dot11RSNAConfigPairwiseUpdateCount) {
1707 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1708 SM_ENTER(WPA_PTK, DISCONNECT);
1709 } else if (sm->TimeoutEvt)
1710 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1711 break;
1712 case WPA_PTK_PTKINITDONE:
1713 break;
1714 }
1715 }
1716
1717
1718 SM_STATE(WPA_PTK_GROUP, IDLE)
1719 {
1720 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1721 if (sm->Init) {
1722 /* Init flag is not cleared here, so avoid busy
1723 * loop by claiming nothing changed. */
1724 sm->changed = FALSE;
1725 }
1726 sm->GTimeoutCtr = 0;
1727 }
1728
1729
1730 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1731 {
1732 u8 rsc[WPA_KEY_RSC_LEN];
1733 struct wpa_group *gsm = sm->group;
1734 u8 *kde, *pos, hdr[2];
1735 size_t kde_len;
1736
1737 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1738 if (sm->wpa == WPA_VERSION_WPA)
1739 sm->PInitAKeys = FALSE;
1740 sm->TimeoutEvt = FALSE;
1741 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1742 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1743 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1744 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1745 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1746 "sending 1/2 msg of Group Key Handshake");
1747
1748 if (sm->wpa == WPA_VERSION_WPA2) {
1749 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1750 ieee80211w_kde_len(sm);
1751 kde = os_malloc(kde_len);
1752 if (kde == NULL)
1753 return;
1754
1755 pos = kde;
1756 hdr[0] = gsm->GN & 0x03;
1757 hdr[1] = 0;
1758 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1759 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1760 pos = ieee80211w_kde_add(sm, pos);
1761 } else {
1762 kde = gsm->GTK[gsm->GN - 1];
1763 pos = kde + gsm->GTK_len;
1764 }
1765
1766 wpa_send_eapol(sm->wpa_auth, sm,
1767 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1768 WPA_KEY_INFO_ACK |
1769 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1770 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1771 if (sm->wpa == WPA_VERSION_WPA2)
1772 os_free(kde);
1773 sm->GTimeoutCtr++;
1774 }
1775
1776
1777 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1778 {
1779 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1780 sm->EAPOLKeyReceived = FALSE;
1781 if (sm->GUpdateStationKeys)
1782 sm->group->GKeyDoneStations--;
1783 sm->GUpdateStationKeys = FALSE;
1784 sm->GTimeoutCtr = 0;
1785 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1786 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1787 "group key handshake completed (%s)",
1788 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1789 sm->has_GTK = TRUE;
1790 }
1791
1792
1793 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1794 {
1795 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1796 if (sm->GUpdateStationKeys)
1797 sm->group->GKeyDoneStations--;
1798 sm->GUpdateStationKeys = FALSE;
1799 sm->Disconnect = TRUE;
1800 }
1801
1802
1803 SM_STEP(WPA_PTK_GROUP)
1804 {
1805 if (sm->Init || sm->PtkGroupInit) {
1806 SM_ENTER(WPA_PTK_GROUP, IDLE);
1807 sm->PtkGroupInit = FALSE;
1808 } else switch (sm->wpa_ptk_group_state) {
1809 case WPA_PTK_GROUP_IDLE:
1810 if (sm->GUpdateStationKeys ||
1811 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1812 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1813 break;
1814 case WPA_PTK_GROUP_REKEYNEGOTIATING:
1815 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1816 !sm->EAPOLKeyPairwise && sm->MICVerified)
1817 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1818 else if (sm->GTimeoutCtr >
1819 (int) dot11RSNAConfigGroupUpdateCount)
1820 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1821 else if (sm->TimeoutEvt)
1822 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1823 break;
1824 case WPA_PTK_GROUP_KEYERROR:
1825 SM_ENTER(WPA_PTK_GROUP, IDLE);
1826 break;
1827 case WPA_PTK_GROUP_REKEYESTABLISHED:
1828 SM_ENTER(WPA_PTK_GROUP, IDLE);
1829 break;
1830 }
1831 }
1832
1833
1834 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1835 struct wpa_group *group)
1836 {
1837 int ret = 0;
1838
1839 /* FIX: is this the correct way of getting GNonce? */
1840 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1841 inc_byte_array(group->Counter, WPA_NONCE_LEN);
1842 wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1843 group->GTK[group->GN - 1], group->GTK_len);
1844
1845 #ifdef CONFIG_IEEE80211W
1846 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1847 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1848 WPA_IGTK_LEN) < 0) {
1849 wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1850 "IGTK");
1851 ret = -1;
1852 }
1853 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1854 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1855 }
1856 #endif /* CONFIG_IEEE80211W */
1857
1858 return ret;
1859 }
1860
1861
1862 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1863 struct wpa_group *group)
1864 {
1865 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1866 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1867 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1868 group->wpa_group_state = WPA_GROUP_GTK_INIT;
1869
1870 /* GTK[0..N] = 0 */
1871 os_memset(group->GTK, 0, sizeof(group->GTK));
1872 group->GN = 1;
1873 group->GM = 2;
1874 #ifdef CONFIG_IEEE80211W
1875 group->GN_igtk = 4;
1876 group->GM_igtk = 5;
1877 #endif /* CONFIG_IEEE80211W */
1878 /* GTK[GN] = CalcGTK() */
1879 wpa_gtk_update(wpa_auth, group);
1880 }
1881
1882
1883 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1884 {
1885 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1886 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1887 "Not in PTKINITDONE; skip Group Key update");
1888 return 0;
1889 }
1890 if (sm->GUpdateStationKeys) {
1891 /*
1892 * This should not really happen, but just in case, make sure
1893 * we do not count the same STA twice in GKeyDoneStations.
1894 */
1895 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1896 "GUpdateStationKeys already set - do not "
1897 "increment GKeyDoneStations");
1898 } else {
1899 sm->group->GKeyDoneStations++;
1900 sm->GUpdateStationKeys = TRUE;
1901 }
1902 wpa_sm_step(sm);
1903 return 0;
1904 }
1905
1906
1907 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1908 struct wpa_group *group)
1909 {
1910 int tmp;
1911
1912 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1913 "SETKEYS (VLAN-ID %d)", group->vlan_id);
1914 group->changed = TRUE;
1915 group->wpa_group_state = WPA_GROUP_SETKEYS;
1916 group->GTKReKey = FALSE;
1917 tmp = group->GM;
1918 group->GM = group->GN;
1919 group->GN = tmp;
1920 #ifdef CONFIG_IEEE80211W
1921 tmp = group->GM_igtk;
1922 group->GM_igtk = group->GN_igtk;
1923 group->GN_igtk = tmp;
1924 #endif /* CONFIG_IEEE80211W */
1925 /* "GKeyDoneStations = GNoStations" is done in more robust way by
1926 * counting the STAs that are marked with GUpdateStationKeys instead of
1927 * including all STAs that could be in not-yet-completed state. */
1928 wpa_gtk_update(wpa_auth, group);
1929
1930 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1931 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1932 group->GKeyDoneStations);
1933 }
1934
1935
1936 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1937 struct wpa_group *group)
1938 {
1939 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1940 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1941 group->changed = TRUE;
1942 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1943 wpa_auth_set_key(wpa_auth, group->vlan_id,
1944 wpa_alg_txt(wpa_auth->conf.wpa_group),
1945 NULL, group->GN, group->GTK[group->GN - 1],
1946 group->GTK_len);
1947
1948 #ifdef CONFIG_IEEE80211W
1949 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1950 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
1951 NULL, group->GN_igtk,
1952 group->IGTK[group->GN_igtk - 4],
1953 WPA_IGTK_LEN);
1954 }
1955 #endif /* CONFIG_IEEE80211W */
1956 }
1957
1958
1959 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
1960 struct wpa_group *group)
1961 {
1962 if (group->GInit) {
1963 wpa_group_gtk_init(wpa_auth, group);
1964 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
1965 group->GTKAuthenticator) {
1966 wpa_group_setkeysdone(wpa_auth, group);
1967 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
1968 group->GTKReKey) {
1969 wpa_group_setkeys(wpa_auth, group);
1970 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
1971 if (group->GKeyDoneStations == 0)
1972 wpa_group_setkeysdone(wpa_auth, group);
1973 else if (group->GTKReKey)
1974 wpa_group_setkeys(wpa_auth, group);
1975 }
1976 }
1977
1978
1979 static void wpa_sm_step(struct wpa_state_machine *sm)
1980 {
1981 if (sm == NULL)
1982 return;
1983
1984 if (sm->in_step_loop) {
1985 /* This should not happen, but if it does, make sure we do not
1986 * end up freeing the state machine too early by exiting the
1987 * recursive call. */
1988 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
1989 return;
1990 }
1991
1992 sm->in_step_loop = 1;
1993 do {
1994 if (sm->pending_deinit)
1995 break;
1996
1997 sm->changed = FALSE;
1998 sm->wpa_auth->group->changed = FALSE;
1999
2000 SM_STEP_RUN(WPA_PTK);
2001 if (sm->pending_deinit)
2002 break;
2003 SM_STEP_RUN(WPA_PTK_GROUP);
2004 if (sm->pending_deinit)
2005 break;
2006 wpa_group_sm_step(sm->wpa_auth, sm->group);
2007 } while (sm->changed || sm->wpa_auth->group->changed);
2008 sm->in_step_loop = 0;
2009
2010 if (sm->pending_deinit) {
2011 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2012 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2013 wpa_free_sta_sm(sm);
2014 }
2015 }
2016
2017
2018 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2019 {
2020 struct wpa_state_machine *sm = eloop_ctx;
2021 wpa_sm_step(sm);
2022 }
2023
2024
2025 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2026 {
2027 if (sm == NULL)
2028 return;
2029 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2030 }
2031
2032
2033 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2034 {
2035 int tmp, i;
2036 struct wpa_group *group;
2037
2038 if (wpa_auth == NULL)
2039 return;
2040
2041 group = wpa_auth->group;
2042
2043 for (i = 0; i < 2; i++) {
2044 tmp = group->GM;
2045 group->GM = group->GN;
2046 group->GN = tmp;
2047 #ifdef CONFIG_IEEE80211W
2048 tmp = group->GM_igtk;
2049 group->GM_igtk = group->GN_igtk;
2050 group->GN_igtk = tmp;
2051 #endif /* CONFIG_IEEE80211W */
2052 wpa_gtk_update(wpa_auth, group);
2053 }
2054 }
2055
2056
2057 static const char * wpa_bool_txt(int bool)
2058 {
2059 return bool ? "TRUE" : "FALSE";
2060 }
2061
2062
2063 static int wpa_cipher_bits(int cipher)
2064 {
2065 switch (cipher) {
2066 case WPA_CIPHER_CCMP:
2067 return 128;
2068 case WPA_CIPHER_TKIP:
2069 return 256;
2070 case WPA_CIPHER_WEP104:
2071 return 104;
2072 case WPA_CIPHER_WEP40:
2073 return 40;
2074 default:
2075 return 0;
2076 }
2077 }
2078
2079
2080 #define RSN_SUITE "%02x-%02x-%02x-%d"
2081 #define RSN_SUITE_ARG(s) \
2082 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2083
2084 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2085 {
2086 int len = 0, ret;
2087 char pmkid_txt[PMKID_LEN * 2 + 1];
2088
2089 if (wpa_auth == NULL)
2090 return len;
2091
2092 ret = os_snprintf(buf + len, buflen - len,
2093 "dot11RSNAOptionImplemented=TRUE\n"
2094 #ifdef CONFIG_RSN_PREAUTH
2095 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2096 #else /* CONFIG_RSN_PREAUTH */
2097 "dot11RSNAPreauthenticationImplemented=FALSE\n"
2098 #endif /* CONFIG_RSN_PREAUTH */
2099 "dot11RSNAEnabled=%s\n"
2100 "dot11RSNAPreauthenticationEnabled=%s\n",
2101 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2102 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2103 if (ret < 0 || (size_t) ret >= buflen - len)
2104 return len;
2105 len += ret;
2106
2107 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2108 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2109
2110 ret = os_snprintf(
2111 buf + len, buflen - len,
2112 "dot11RSNAConfigVersion=%u\n"
2113 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2114 /* FIX: dot11RSNAConfigGroupCipher */
2115 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2116 /* FIX: dot11RSNAConfigGroupRekeyTime */
2117 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2118 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2119 "dot11RSNAConfigGroupUpdateCount=%u\n"
2120 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2121 "dot11RSNAConfigGroupCipherSize=%u\n"
2122 "dot11RSNAConfigPMKLifetime=%u\n"
2123 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2124 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2125 "dot11RSNAConfigSATimeout=%u\n"
2126 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2127 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2128 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2129 "dot11RSNAPMKIDUsed=%s\n"
2130 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2131 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2132 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2133 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2134 "dot11RSNA4WayHandshakeFailures=%u\n"
2135 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2136 RSN_VERSION,
2137 !!wpa_auth->conf.wpa_strict_rekey,
2138 dot11RSNAConfigGroupUpdateCount,
2139 dot11RSNAConfigPairwiseUpdateCount,
2140 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2141 dot11RSNAConfigPMKLifetime,
2142 dot11RSNAConfigPMKReauthThreshold,
2143 dot11RSNAConfigSATimeout,
2144 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2145 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2146 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2147 pmkid_txt,
2148 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2149 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2150 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2151 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2152 wpa_auth->dot11RSNA4WayHandshakeFailures);
2153 if (ret < 0 || (size_t) ret >= buflen - len)
2154 return len;
2155 len += ret;
2156
2157 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2158 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2159
2160 /* Private MIB */
2161 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2162 wpa_auth->group->wpa_group_state);
2163 if (ret < 0 || (size_t) ret >= buflen - len)
2164 return len;
2165 len += ret;
2166
2167 return len;
2168 }
2169
2170
2171 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2172 {
2173 int len = 0, ret;
2174 u32 pairwise = 0;
2175
2176 if (sm == NULL)
2177 return 0;
2178
2179 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2180
2181 /* dot11RSNAStatsEntry */
2182
2183 if (sm->wpa == WPA_VERSION_WPA) {
2184 if (sm->pairwise == WPA_CIPHER_CCMP)
2185 pairwise = WPA_CIPHER_SUITE_CCMP;
2186 else if (sm->pairwise == WPA_CIPHER_TKIP)
2187 pairwise = WPA_CIPHER_SUITE_TKIP;
2188 else if (sm->pairwise == WPA_CIPHER_WEP104)
2189 pairwise = WPA_CIPHER_SUITE_WEP104;
2190 else if (sm->pairwise == WPA_CIPHER_WEP40)
2191 pairwise = WPA_CIPHER_SUITE_WEP40;
2192 else if (sm->pairwise == WPA_CIPHER_NONE)
2193 pairwise = WPA_CIPHER_SUITE_NONE;
2194 } else if (sm->wpa == WPA_VERSION_WPA2) {
2195 if (sm->pairwise == WPA_CIPHER_CCMP)
2196 pairwise = RSN_CIPHER_SUITE_CCMP;
2197 else if (sm->pairwise == WPA_CIPHER_TKIP)
2198 pairwise = RSN_CIPHER_SUITE_TKIP;
2199 else if (sm->pairwise == WPA_CIPHER_WEP104)
2200 pairwise = RSN_CIPHER_SUITE_WEP104;
2201 else if (sm->pairwise == WPA_CIPHER_WEP40)
2202 pairwise = RSN_CIPHER_SUITE_WEP40;
2203 else if (sm->pairwise == WPA_CIPHER_NONE)
2204 pairwise = RSN_CIPHER_SUITE_NONE;
2205 } else
2206 return 0;
2207
2208 ret = os_snprintf(
2209 buf + len, buflen - len,
2210 /* TODO: dot11RSNAStatsIndex */
2211 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2212 "dot11RSNAStatsVersion=1\n"
2213 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2214 /* TODO: dot11RSNAStatsTKIPICVErrors */
2215 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2216 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2217 /* TODO: dot11RSNAStatsCCMPReplays */
2218 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2219 /* TODO: dot11RSNAStatsTKIPReplays */,
2220 MAC2STR(sm->addr),
2221 RSN_SUITE_ARG(pairwise),
2222 sm->dot11RSNAStatsTKIPLocalMICFailures,
2223 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2224 if (ret < 0 || (size_t) ret >= buflen - len)
2225 return len;
2226 len += ret;
2227
2228 /* Private MIB */
2229 ret = os_snprintf(buf + len, buflen - len,
2230 "hostapdWPAPTKState=%d\n"
2231 "hostapdWPAPTKGroupState=%d\n",
2232 sm->wpa_ptk_state,
2233 sm->wpa_ptk_group_state);
2234 if (ret < 0 || (size_t) ret >= buflen - len)
2235 return len;
2236 len += ret;
2237
2238 return len;
2239 }
2240
2241
2242 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2243 {
2244 if (wpa_auth)
2245 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2246 }
2247
2248
2249 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2250 {
2251 return sm && sm->pairwise_set;
2252 }
2253
2254
2255 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2256 {
2257 if (sm == NULL)
2258 return -1;
2259 return sm->wpa_key_mgmt;
2260 }
2261
2262
2263 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2264 {
2265 if (sm == NULL)
2266 return 0;
2267 return sm->wpa;
2268 }
2269
2270
2271 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2272 struct rsn_pmksa_cache_entry *entry)
2273 {
2274 if (sm == NULL || sm->pmksa != entry)
2275 return -1;
2276 sm->pmksa = NULL;
2277 return 0;
2278 }
2279
2280
2281 struct rsn_pmksa_cache_entry *
2282 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2283 {
2284 return sm ? sm->pmksa : NULL;
2285 }
2286
2287
2288 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2289 {
2290 if (sm)
2291 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2292 }
2293
2294
2295 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2296 {
2297 if (wpa_auth == NULL)
2298 return NULL;
2299 *len = wpa_auth->wpa_ie_len;
2300 return wpa_auth->wpa_ie;
2301 }
2302
2303
2304 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2305 int session_timeout, struct eapol_state_machine *eapol)
2306 {
2307 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2308 return -1;
2309
2310 if (pmksa_cache_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2311 sm->wpa_auth->addr, sm->addr, session_timeout,
2312 eapol, sm->wpa_key_mgmt))
2313 return 0;
2314
2315 return -1;
2316 }
2317
2318
2319 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2320 const u8 *pmk, size_t len, const u8 *sta_addr,
2321 int session_timeout,
2322 struct eapol_state_machine *eapol)
2323 {
2324 if (wpa_auth == NULL)
2325 return -1;
2326
2327 if (pmksa_cache_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2328 sta_addr, session_timeout, eapol,
2329 WPA_KEY_MGMT_IEEE8021X))
2330 return 0;
2331
2332 return -1;
2333 }
2334
2335
2336 static struct wpa_group *
2337 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2338 {
2339 struct wpa_group *group;
2340
2341 if (wpa_auth == NULL || wpa_auth->group == NULL)
2342 return NULL;
2343
2344 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2345 vlan_id);
2346 group = wpa_group_init(wpa_auth, vlan_id);
2347 if (group == NULL)
2348 return NULL;
2349
2350 group->next = wpa_auth->group->next;
2351 wpa_auth->group->next = group;
2352
2353 return group;
2354 }
2355
2356
2357 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2358 {
2359 struct wpa_group *group;
2360
2361 if (sm == NULL || sm->wpa_auth == NULL)
2362 return 0;
2363
2364 group = sm->wpa_auth->group;
2365 while (group) {
2366 if (group->vlan_id == vlan_id)
2367 break;
2368 group = group->next;
2369 }
2370
2371 if (group == NULL) {
2372 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2373 if (group == NULL)
2374 return -1;
2375 }
2376
2377 if (sm->group == group)
2378 return 0;
2379
2380 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2381 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2382
2383 sm->group = group;
2384 return 0;
2385 }
2386
2387 #endif /* CONFIG_NATIVE_WINDOWS */
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