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Added support for using SHA256-based stronger key derivation for WPA2
[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
47 /* Default timeouts are 100 ms, but this seems to be a bit too fast for most
48 * WPA Supplicants, so use a bit longer timeout. */
49 static const u32 dot11RSNAConfigGroupUpdateTimeOut = 1000; /* ms */
50 static const u32 dot11RSNAConfigGroupUpdateCount = 3;
51 static const u32 dot11RSNAConfigPairwiseUpdateTimeOut = 1000; /* ms */
52 static const u32 dot11RSNAConfigPairwiseUpdateCount = 3;
53
54 /* TODO: make these configurable */
55 static const int dot11RSNAConfigPMKLifetime = 43200;
56 static const int dot11RSNAConfigPMKReauthThreshold = 70;
57 static const int dot11RSNAConfigSATimeout = 60;
58
59
60 static inline void wpa_auth_mic_failure_report(
61 struct wpa_authenticator *wpa_auth, const u8 *addr)
62 {
63 if (wpa_auth->cb.mic_failure_report)
64 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
65 }
66
67
68 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
69 const u8 *addr, wpa_eapol_variable var,
70 int value)
71 {
72 if (wpa_auth->cb.set_eapol)
73 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
74 }
75
76
77 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
78 const u8 *addr, wpa_eapol_variable var)
79 {
80 if (wpa_auth->cb.get_eapol == NULL)
81 return -1;
82 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
83 }
84
85
86 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
87 const u8 *addr, const u8 *prev_psk)
88 {
89 if (wpa_auth->cb.get_psk == NULL)
90 return NULL;
91 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
92 }
93
94
95 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
96 const u8 *addr, u8 *msk, size_t *len)
97 {
98 if (wpa_auth->cb.get_msk == NULL)
99 return -1;
100 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
101 }
102
103
104 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
105 int vlan_id,
106 const char *alg, const u8 *addr, int idx,
107 u8 *key, size_t key_len)
108 {
109 if (wpa_auth->cb.set_key == NULL)
110 return -1;
111 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
112 key, key_len);
113 }
114
115
116 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
117 const u8 *addr, int idx, u8 *seq)
118 {
119 if (wpa_auth->cb.get_seqnum == NULL)
120 return -1;
121 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
122 }
123
124
125 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
126 const u8 *addr, int idx, u8 *seq)
127 {
128 if (wpa_auth->cb.get_seqnum_igtk == NULL)
129 return -1;
130 return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
131 }
132
133
134 static inline int
135 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
136 const u8 *data, size_t data_len, int encrypt)
137 {
138 if (wpa_auth->cb.send_eapol == NULL)
139 return -1;
140 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
141 encrypt);
142 }
143
144
145 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
146 int (*cb)(struct wpa_state_machine *sm, void *ctx),
147 void *cb_ctx)
148 {
149 if (wpa_auth->cb.for_each_sta == NULL)
150 return 0;
151 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
152 }
153
154
155 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
156 int (*cb)(struct wpa_authenticator *a, void *ctx),
157 void *cb_ctx)
158 {
159 if (wpa_auth->cb.for_each_auth == NULL)
160 return 0;
161 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
162 }
163
164
165 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
166 logger_level level, const char *txt)
167 {
168 if (wpa_auth->cb.logger == NULL)
169 return;
170 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
171 }
172
173
174 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
175 logger_level level, const char *fmt, ...)
176 {
177 char *format;
178 int maxlen;
179 va_list ap;
180
181 if (wpa_auth->cb.logger == NULL)
182 return;
183
184 maxlen = os_strlen(fmt) + 100;
185 format = os_malloc(maxlen);
186 if (!format)
187 return;
188
189 va_start(ap, fmt);
190 vsnprintf(format, maxlen, fmt, ap);
191 va_end(ap);
192
193 wpa_auth_logger(wpa_auth, addr, level, format);
194
195 os_free(format);
196 }
197
198
199 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
200 const u8 *addr)
201 {
202 if (wpa_auth->cb.disconnect == NULL)
203 return;
204 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
205 WLAN_REASON_PREV_AUTH_NOT_VALID);
206 }
207
208
209 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
210 {
211 int ret = 0;
212 #ifdef CONFIG_IEEE80211R
213 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
214 ret = 1;
215 #endif /* CONFIG_IEEE80211R */
216 #ifdef CONFIG_IEEE80211W
217 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
218 ret = 1;
219 #endif /* CONFIG_IEEE80211W */
220 return ret;
221 }
222
223
224 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
225 {
226 struct wpa_authenticator *wpa_auth = eloop_ctx;
227
228 if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
229 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
230 "initialization.");
231 } else {
232 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
233 }
234
235 if (wpa_auth->conf.wpa_gmk_rekey) {
236 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
237 wpa_rekey_gmk, wpa_auth, NULL);
238 }
239 }
240
241
242 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
243 {
244 struct wpa_authenticator *wpa_auth = eloop_ctx;
245 struct wpa_group *group;
246
247 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
248 for (group = wpa_auth->group; group; group = group->next) {
249 group->GTKReKey = TRUE;
250 do {
251 group->changed = FALSE;
252 wpa_group_sm_step(wpa_auth, group);
253 } while (group->changed);
254 }
255
256 if (wpa_auth->conf.wpa_group_rekey) {
257 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
258 0, wpa_rekey_gtk, wpa_auth, NULL);
259 }
260 }
261
262
263 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
264 {
265 if (sm->pmksa == ctx)
266 sm->pmksa = NULL;
267 return 0;
268 }
269
270
271 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
272 void *ctx)
273 {
274 struct wpa_authenticator *wpa_auth = ctx;
275 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
276 }
277
278
279 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
280 int vlan_id)
281 {
282 struct wpa_group *group;
283 u8 buf[ETH_ALEN + 8 + sizeof(group)];
284 u8 rkey[32];
285
286 group = os_zalloc(sizeof(struct wpa_group));
287 if (group == NULL)
288 return NULL;
289
290 group->GTKAuthenticator = TRUE;
291 group->vlan_id = vlan_id;
292
293 switch (wpa_auth->conf.wpa_group) {
294 case WPA_CIPHER_CCMP:
295 group->GTK_len = 16;
296 break;
297 case WPA_CIPHER_TKIP:
298 group->GTK_len = 32;
299 break;
300 case WPA_CIPHER_WEP104:
301 group->GTK_len = 13;
302 break;
303 case WPA_CIPHER_WEP40:
304 group->GTK_len = 5;
305 break;
306 }
307
308 /* Counter = PRF-256(Random number, "Init Counter",
309 * Local MAC Address || Time)
310 */
311 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
312 wpa_get_ntp_timestamp(buf + ETH_ALEN);
313 os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
314 if (os_get_random(rkey, sizeof(rkey)) ||
315 os_get_random(group->GMK, WPA_GMK_LEN)) {
316 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
317 "initialization.");
318 os_free(group);
319 return NULL;
320 }
321
322 sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
323 group->Counter, WPA_NONCE_LEN);
324
325 group->GInit = TRUE;
326 wpa_group_sm_step(wpa_auth, group);
327 group->GInit = FALSE;
328 wpa_group_sm_step(wpa_auth, group);
329
330 return group;
331 }
332
333
334 /**
335 * wpa_init - Initialize WPA authenticator
336 * @addr: Authenticator address
337 * @conf: Configuration for WPA authenticator
338 * Returns: Pointer to WPA authenticator data or %NULL on failure
339 */
340 struct wpa_authenticator * wpa_init(const u8 *addr,
341 struct wpa_auth_config *conf,
342 struct wpa_auth_callbacks *cb)
343 {
344 struct wpa_authenticator *wpa_auth;
345
346 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
347 if (wpa_auth == NULL)
348 return NULL;
349 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
350 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
351 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
352
353 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
354 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
355 os_free(wpa_auth);
356 return NULL;
357 }
358
359 wpa_auth->group = wpa_group_init(wpa_auth, 0);
360 if (wpa_auth->group == NULL) {
361 os_free(wpa_auth->wpa_ie);
362 os_free(wpa_auth);
363 return NULL;
364 }
365
366 wpa_auth->pmksa = pmksa_cache_init(wpa_auth_pmksa_free_cb, wpa_auth);
367 if (wpa_auth->pmksa == NULL) {
368 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
369 os_free(wpa_auth->wpa_ie);
370 os_free(wpa_auth);
371 return NULL;
372 }
373
374 #ifdef CONFIG_IEEE80211R
375 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
376 if (wpa_auth->ft_pmk_cache == NULL) {
377 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
378 os_free(wpa_auth->wpa_ie);
379 pmksa_cache_deinit(wpa_auth->pmksa);
380 os_free(wpa_auth);
381 return NULL;
382 }
383 #endif /* CONFIG_IEEE80211R */
384
385 if (wpa_auth->conf.wpa_gmk_rekey) {
386 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
387 wpa_rekey_gmk, wpa_auth, NULL);
388 }
389
390 if (wpa_auth->conf.wpa_group_rekey) {
391 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
392 wpa_rekey_gtk, wpa_auth, NULL);
393 }
394
395 return wpa_auth;
396 }
397
398
399 /**
400 * wpa_deinit - Deinitialize WPA authenticator
401 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
402 */
403 void wpa_deinit(struct wpa_authenticator *wpa_auth)
404 {
405 struct wpa_group *group, *prev;
406
407 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
408 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
409
410 #ifdef CONFIG_PEERKEY
411 while (wpa_auth->stsl_negotiations)
412 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
413 #endif /* CONFIG_PEERKEY */
414
415 pmksa_cache_deinit(wpa_auth->pmksa);
416
417 #ifdef CONFIG_IEEE80211R
418 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
419 wpa_auth->ft_pmk_cache = NULL;
420 #endif /* CONFIG_IEEE80211R */
421
422 os_free(wpa_auth->wpa_ie);
423
424 group = wpa_auth->group;
425 while (group) {
426 prev = group;
427 group = group->next;
428 os_free(prev);
429 }
430
431 os_free(wpa_auth);
432 }
433
434
435 /**
436 * wpa_reconfig - Update WPA authenticator configuration
437 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
438 * @conf: Configuration for WPA authenticator
439 */
440 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
441 struct wpa_auth_config *conf)
442 {
443 if (wpa_auth == NULL)
444 return 0;
445
446 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
447 /*
448 * TODO:
449 * Disassociate stations if configuration changed
450 * Update WPA/RSN IE
451 */
452 return 0;
453 }
454
455
456 struct wpa_state_machine *
457 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
458 {
459 struct wpa_state_machine *sm;
460
461 sm = os_zalloc(sizeof(struct wpa_state_machine));
462 if (sm == NULL)
463 return NULL;
464 os_memcpy(sm->addr, addr, ETH_ALEN);
465
466 sm->wpa_auth = wpa_auth;
467 sm->group = wpa_auth->group;
468
469 return sm;
470 }
471
472
473 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
474 struct wpa_state_machine *sm)
475 {
476 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
477 return;
478
479 #ifdef CONFIG_IEEE80211R
480 if (sm->ft_completed) {
481 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
482 "FT authentication already completed - do not "
483 "start 4-way handshake");
484 return;
485 }
486 #endif /* CONFIG_IEEE80211R */
487
488 if (sm->started) {
489 os_memset(sm->key_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
490 sm->ReAuthenticationRequest = TRUE;
491 wpa_sm_step(sm);
492 return;
493 }
494
495 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
496 "start authentication");
497 sm->started = 1;
498
499 sm->Init = TRUE;
500 wpa_sm_step(sm);
501 sm->Init = FALSE;
502 sm->AuthenticationRequest = TRUE;
503 wpa_sm_step(sm);
504 }
505
506
507 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
508 {
509 os_free(sm->last_rx_eapol_key);
510 os_free(sm->wpa_ie);
511 os_free(sm);
512 }
513
514
515 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
516 {
517 if (sm == NULL)
518 return;
519
520 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
521 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
522 "strict rekeying - force GTK rekey since STA "
523 "is leaving");
524 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
525 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
526 NULL);
527 }
528
529 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
530 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
531 if (sm->in_step_loop) {
532 /* Must not free state machine while wpa_sm_step() is running.
533 * Freeing will be completed in the end of wpa_sm_step(). */
534 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
535 "machine deinit for " MACSTR, MAC2STR(sm->addr));
536 sm->pending_deinit = 1;
537 } else
538 wpa_free_sta_sm(sm);
539 }
540
541
542 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
543 {
544 if (sm == NULL)
545 return;
546
547 sm->PTKRequest = TRUE;
548 sm->PTK_valid = 0;
549 }
550
551
552 void wpa_receive(struct wpa_authenticator *wpa_auth,
553 struct wpa_state_machine *sm,
554 u8 *data, size_t data_len)
555 {
556 struct ieee802_1x_hdr *hdr;
557 struct wpa_eapol_key *key;
558 u16 key_info, key_data_length;
559 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
560 SMK_M1, SMK_M3, SMK_ERROR } msg;
561 char *msgtxt;
562 struct wpa_eapol_ie_parse kde;
563
564 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
565 return;
566
567 if (data_len < sizeof(*hdr) + sizeof(*key))
568 return;
569
570 hdr = (struct ieee802_1x_hdr *) data;
571 key = (struct wpa_eapol_key *) (hdr + 1);
572 key_info = WPA_GET_BE16(key->key_info);
573 key_data_length = WPA_GET_BE16(key->key_data_length);
574 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
575 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
576 "key_data overflow (%d > %lu)",
577 key_data_length,
578 (unsigned long) (data_len - sizeof(*hdr) -
579 sizeof(*key)));
580 return;
581 }
582
583 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
584 * are set */
585
586 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
587 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
588 if (key_info & WPA_KEY_INFO_ERROR) {
589 msg = SMK_ERROR;
590 msgtxt = "SMK Error";
591 } else {
592 msg = SMK_M1;
593 msgtxt = "SMK M1";
594 }
595 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
596 msg = SMK_M3;
597 msgtxt = "SMK M3";
598 } else if (key_info & WPA_KEY_INFO_REQUEST) {
599 msg = REQUEST;
600 msgtxt = "Request";
601 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
602 msg = GROUP_2;
603 msgtxt = "2/2 Group";
604 } else if (key_data_length == 0) {
605 msg = PAIRWISE_4;
606 msgtxt = "4/4 Pairwise";
607 } else {
608 msg = PAIRWISE_2;
609 msgtxt = "2/4 Pairwise";
610 }
611
612 /* TODO: key_info type validation for PeerKey */
613 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
614 msg == GROUP_2) {
615 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
616 if (sm->pairwise == WPA_CIPHER_CCMP) {
617 if (wpa_use_aes_cmac(sm) &&
618 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
619 wpa_auth_logger(wpa_auth, sm->addr,
620 LOGGER_WARNING,
621 "advertised support for "
622 "AES-128-CMAC, but did not "
623 "use it");
624 return;
625 }
626
627 if (!wpa_use_aes_cmac(sm) &&
628 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
629 wpa_auth_logger(wpa_auth, sm->addr,
630 LOGGER_WARNING,
631 "did not use HMAC-SHA1-AES "
632 "with CCMP");
633 return;
634 }
635 }
636 }
637
638 if (key_info & WPA_KEY_INFO_REQUEST) {
639 if (sm->req_replay_counter_used &&
640 os_memcmp(key->replay_counter, sm->req_replay_counter,
641 WPA_REPLAY_COUNTER_LEN) <= 0) {
642 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
643 "received EAPOL-Key request with "
644 "replayed counter");
645 return;
646 }
647 }
648
649 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
650 (!sm->key_replay_counter_valid ||
651 os_memcmp(key->replay_counter, sm->key_replay_counter,
652 WPA_REPLAY_COUNTER_LEN) != 0)) {
653 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
654 "received EAPOL-Key %s with unexpected "
655 "replay counter", msgtxt);
656 wpa_hexdump(MSG_DEBUG, "expected replay counter",
657 sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
658 wpa_hexdump(MSG_DEBUG, "received replay counter",
659 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
660 return;
661 }
662
663 switch (msg) {
664 case PAIRWISE_2:
665 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
666 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
667 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
668 "received EAPOL-Key msg 2/4 in "
669 "invalid state (%d) - dropped",
670 sm->wpa_ptk_state);
671 return;
672 }
673 if (sm->wpa_ie == NULL ||
674 sm->wpa_ie_len != key_data_length ||
675 os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
676 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
677 "WPA IE from (Re)AssocReq did not "
678 "match with msg 2/4");
679 if (sm->wpa_ie) {
680 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
681 sm->wpa_ie, sm->wpa_ie_len);
682 }
683 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
684 (u8 *) (key + 1), key_data_length);
685 /* MLME-DEAUTHENTICATE.request */
686 wpa_sta_disconnect(wpa_auth, sm->addr);
687 return;
688 }
689 break;
690 case PAIRWISE_4:
691 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
692 !sm->PTK_valid) {
693 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
694 "received EAPOL-Key msg 4/4 in "
695 "invalid state (%d) - dropped",
696 sm->wpa_ptk_state);
697 return;
698 }
699 break;
700 case GROUP_2:
701 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
702 || !sm->PTK_valid) {
703 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
704 "received EAPOL-Key msg 2/2 in "
705 "invalid state (%d) - dropped",
706 sm->wpa_ptk_group_state);
707 return;
708 }
709 break;
710 #ifdef CONFIG_PEERKEY
711 case SMK_M1:
712 case SMK_M3:
713 case SMK_ERROR:
714 if (!wpa_auth->conf.peerkey) {
715 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
716 "PeerKey use disabled - ignoring message");
717 return;
718 }
719 if (!sm->PTK_valid) {
720 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
721 "received EAPOL-Key msg SMK in "
722 "invalid state - dropped");
723 return;
724 }
725 break;
726 #else /* CONFIG_PEERKEY */
727 case SMK_M1:
728 case SMK_M3:
729 case SMK_ERROR:
730 return; /* STSL disabled - ignore SMK messages */
731 #endif /* CONFIG_PEERKEY */
732 case REQUEST:
733 break;
734 }
735
736 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
737 "received EAPOL-Key frame (%s)", msgtxt);
738
739 if (key_info & WPA_KEY_INFO_ACK) {
740 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
741 "received invalid EAPOL-Key: Key Ack set");
742 return;
743 }
744
745 if (!(key_info & WPA_KEY_INFO_MIC)) {
746 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
747 "received invalid EAPOL-Key: Key MIC not set");
748 return;
749 }
750
751 sm->MICVerified = FALSE;
752 if (sm->PTK_valid) {
753 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
754 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
755 "received EAPOL-Key with invalid MIC");
756 return;
757 }
758 sm->MICVerified = TRUE;
759 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
760 }
761
762 if (key_info & WPA_KEY_INFO_REQUEST) {
763 if (sm->MICVerified) {
764 sm->req_replay_counter_used = 1;
765 os_memcpy(sm->req_replay_counter, key->replay_counter,
766 WPA_REPLAY_COUNTER_LEN);
767 } else {
768 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
769 "received EAPOL-Key request with "
770 "invalid MIC");
771 return;
772 }
773
774 /*
775 * TODO: should decrypt key data field if encryption was used;
776 * even though MAC address KDE is not normally encrypted,
777 * supplicant is allowed to encrypt it.
778 */
779 if (msg == SMK_ERROR) {
780 #ifdef CONFIG_PEERKEY
781 wpa_smk_error(wpa_auth, sm, key);
782 #endif /* CONFIG_PEERKEY */
783 return;
784 } else if (key_info & WPA_KEY_INFO_ERROR) {
785 /* Supplicant reported a Michael MIC error */
786 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
787 "received EAPOL-Key Error Request "
788 "(STA detected Michael MIC failure)");
789 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
790 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
791 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
792 /* Error report is not a request for a new key
793 * handshake, but since Authenticator may do it, let's
794 * change the keys now anyway. */
795 wpa_request_new_ptk(sm);
796 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
797 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
798 "received EAPOL-Key Request for new "
799 "4-Way Handshake");
800 wpa_request_new_ptk(sm);
801 #ifdef CONFIG_PEERKEY
802 } else if (msg == SMK_M1) {
803 wpa_smk_m1(wpa_auth, sm, key);
804 #endif /* CONFIG_PEERKEY */
805 } else if (key_data_length > 0 &&
806 wpa_parse_kde_ies((const u8 *) (key + 1),
807 key_data_length, &kde) == 0 &&
808 kde.mac_addr) {
809 } else {
810 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
811 "received EAPOL-Key Request for GTK "
812 "rekeying");
813 /* FIX: why was this triggering PTK rekeying for the
814 * STA that requested Group Key rekeying?? */
815 /* wpa_request_new_ptk(sta->wpa_sm); */
816 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
817 wpa_rekey_gtk(wpa_auth, NULL);
818 }
819 } else {
820 /* Do not allow the same key replay counter to be reused. */
821 sm->key_replay_counter_valid = FALSE;
822 }
823
824 #ifdef CONFIG_PEERKEY
825 if (msg == SMK_M3) {
826 wpa_smk_m3(wpa_auth, sm, key);
827 return;
828 }
829 #endif /* CONFIG_PEERKEY */
830
831 os_free(sm->last_rx_eapol_key);
832 sm->last_rx_eapol_key = os_malloc(data_len);
833 if (sm->last_rx_eapol_key == NULL)
834 return;
835 os_memcpy(sm->last_rx_eapol_key, data, data_len);
836 sm->last_rx_eapol_key_len = data_len;
837
838 sm->EAPOLKeyReceived = TRUE;
839 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
840 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
841 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
842 wpa_sm_step(sm);
843 }
844
845
846 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
847 u8 *gtk, size_t gtk_len)
848 {
849 u8 data[ETH_ALEN + WPA_NONCE_LEN];
850
851 /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
852 os_memcpy(data, addr, ETH_ALEN);
853 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
854
855 #ifdef CONFIG_IEEE80211W
856 sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
857 data, sizeof(data), gtk, gtk_len);
858 #else /* CONFIG_IEEE80211W */
859 sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
860 data, sizeof(data), gtk, gtk_len);
861 #endif /* CONFIG_IEEE80211W */
862
863 wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
864 wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
865 }
866
867
868 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
869 {
870 struct wpa_authenticator *wpa_auth = eloop_ctx;
871 struct wpa_state_machine *sm = timeout_ctx;
872
873 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
874 sm->TimeoutEvt = TRUE;
875 wpa_sm_step(sm);
876 }
877
878
879 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
880 struct wpa_state_machine *sm, int key_info,
881 const u8 *key_rsc, const u8 *nonce,
882 const u8 *kde, size_t kde_len,
883 int keyidx, int encr, int force_version)
884 {
885 struct ieee802_1x_hdr *hdr;
886 struct wpa_eapol_key *key;
887 size_t len;
888 int alg;
889 int key_data_len, pad_len = 0;
890 u8 *buf, *pos;
891 int version, pairwise;
892
893 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
894
895 if (force_version)
896 version = force_version;
897 else if (wpa_use_aes_cmac(sm))
898 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
899 else if (sm->pairwise == WPA_CIPHER_CCMP)
900 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
901 else
902 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
903
904 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
905
906 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
907 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
908 "encr=%d)",
909 version,
910 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
911 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
912 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
913 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
914 pairwise, (unsigned long) kde_len, keyidx, encr);
915
916 key_data_len = kde_len;
917
918 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
919 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
920 pad_len = key_data_len % 8;
921 if (pad_len)
922 pad_len = 8 - pad_len;
923 key_data_len += pad_len + 8;
924 }
925
926 len += key_data_len;
927
928 hdr = os_zalloc(len);
929 if (hdr == NULL)
930 return;
931 hdr->version = wpa_auth->conf.eapol_version;
932 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
933 hdr->length = host_to_be16(len - sizeof(*hdr));
934 key = (struct wpa_eapol_key *) (hdr + 1);
935
936 key->type = sm->wpa == WPA_VERSION_WPA2 ?
937 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
938 key_info |= version;
939 if (encr && sm->wpa == WPA_VERSION_WPA2)
940 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
941 if (sm->wpa != WPA_VERSION_WPA2)
942 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
943 WPA_PUT_BE16(key->key_info, key_info);
944
945 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
946 switch (alg) {
947 case WPA_CIPHER_CCMP:
948 WPA_PUT_BE16(key->key_length, 16);
949 break;
950 case WPA_CIPHER_TKIP:
951 WPA_PUT_BE16(key->key_length, 32);
952 break;
953 case WPA_CIPHER_WEP40:
954 WPA_PUT_BE16(key->key_length, 5);
955 break;
956 case WPA_CIPHER_WEP104:
957 WPA_PUT_BE16(key->key_length, 13);
958 break;
959 }
960 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
961 WPA_PUT_BE16(key->key_length, 0);
962
963 /* FIX: STSL: what to use as key_replay_counter? */
964 inc_byte_array(sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
965 os_memcpy(key->replay_counter, sm->key_replay_counter,
966 WPA_REPLAY_COUNTER_LEN);
967 sm->key_replay_counter_valid = TRUE;
968
969 if (nonce)
970 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
971
972 if (key_rsc)
973 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
974
975 if (kde && !encr) {
976 os_memcpy(key + 1, kde, kde_len);
977 WPA_PUT_BE16(key->key_data_length, kde_len);
978 } else if (encr && kde) {
979 buf = os_zalloc(key_data_len);
980 if (buf == NULL) {
981 os_free(hdr);
982 return;
983 }
984 pos = buf;
985 os_memcpy(pos, kde, kde_len);
986 pos += kde_len;
987
988 if (pad_len)
989 *pos++ = 0xdd;
990
991 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
992 buf, key_data_len);
993 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
994 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
995 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
996 (u8 *) (key + 1))) {
997 os_free(hdr);
998 os_free(buf);
999 return;
1000 }
1001 WPA_PUT_BE16(key->key_data_length, key_data_len);
1002 } else {
1003 u8 ek[32];
1004 os_memcpy(key->key_iv,
1005 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1006 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1007 os_memcpy(ek, key->key_iv, 16);
1008 os_memcpy(ek + 16, sm->PTK.kek, 16);
1009 os_memcpy(key + 1, buf, key_data_len);
1010 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1011 WPA_PUT_BE16(key->key_data_length, key_data_len);
1012 }
1013 os_free(buf);
1014 }
1015
1016 if (key_info & WPA_KEY_INFO_MIC) {
1017 if (!sm->PTK_valid) {
1018 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1019 "PTK not valid when sending EAPOL-Key "
1020 "frame");
1021 os_free(hdr);
1022 return;
1023 }
1024 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1025 key->key_mic);
1026 }
1027
1028 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1029 1);
1030 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1031 sm->pairwise_set);
1032 os_free(hdr);
1033 }
1034
1035
1036 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1037 struct wpa_state_machine *sm, int key_info,
1038 const u8 *key_rsc, const u8 *nonce,
1039 const u8 *kde, size_t kde_len,
1040 int keyidx, int encr)
1041 {
1042 int timeout_ms;
1043 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1044
1045 if (sm == NULL)
1046 return;
1047
1048 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1049 keyidx, encr, 0);
1050
1051 timeout_ms = pairwise ? dot11RSNAConfigPairwiseUpdateTimeOut :
1052 dot11RSNAConfigGroupUpdateTimeOut;
1053 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1054 wpa_send_eapol_timeout, wpa_auth, sm);
1055 }
1056
1057
1058 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1059 {
1060 struct ieee802_1x_hdr *hdr;
1061 struct wpa_eapol_key *key;
1062 u16 key_info;
1063 int ret = 0;
1064 u8 mic[16];
1065
1066 if (data_len < sizeof(*hdr) + sizeof(*key))
1067 return -1;
1068
1069 hdr = (struct ieee802_1x_hdr *) data;
1070 key = (struct wpa_eapol_key *) (hdr + 1);
1071 key_info = WPA_GET_BE16(key->key_info);
1072 os_memcpy(mic, key->key_mic, 16);
1073 os_memset(key->key_mic, 0, 16);
1074 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1075 data, data_len, key->key_mic) ||
1076 os_memcmp(mic, key->key_mic, 16) != 0)
1077 ret = -1;
1078 os_memcpy(key->key_mic, mic, 16);
1079 return ret;
1080 }
1081
1082
1083 void wpa_remove_ptk(struct wpa_state_machine *sm)
1084 {
1085 sm->PTK_valid = FALSE;
1086 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1087 wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1088 sm->pairwise_set = FALSE;
1089 }
1090
1091
1092 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1093 {
1094 int remove_ptk = 1;
1095
1096 if (sm == NULL)
1097 return;
1098
1099 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1100 "event %d notification", event);
1101
1102 switch (event) {
1103 case WPA_AUTH:
1104 case WPA_ASSOC:
1105 break;
1106 case WPA_DEAUTH:
1107 case WPA_DISASSOC:
1108 sm->DeauthenticationRequest = TRUE;
1109 break;
1110 case WPA_REAUTH:
1111 case WPA_REAUTH_EAPOL:
1112 sm->ReAuthenticationRequest = TRUE;
1113 break;
1114 case WPA_ASSOC_FT:
1115 #ifdef CONFIG_IEEE80211R
1116 /* Using FT protocol, not WPA auth state machine */
1117 sm->ft_completed = 1;
1118 return;
1119 #else /* CONFIG_IEEE80211R */
1120 break;
1121 #endif /* CONFIG_IEEE80211R */
1122 }
1123
1124 #ifdef CONFIG_IEEE80211R
1125 sm->ft_completed = 0;
1126 #endif /* CONFIG_IEEE80211R */
1127
1128 #ifdef CONFIG_IEEE80211W
1129 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1130 remove_ptk = 0;
1131 #endif /* CONFIG_IEEE80211W */
1132
1133 if (remove_ptk) {
1134 sm->PTK_valid = FALSE;
1135 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1136
1137 if (event != WPA_REAUTH_EAPOL)
1138 wpa_remove_ptk(sm);
1139 }
1140
1141 wpa_sm_step(sm);
1142 }
1143
1144
1145 static const char * wpa_alg_txt(int alg)
1146 {
1147 switch (alg) {
1148 case WPA_CIPHER_CCMP:
1149 return "CCMP";
1150 case WPA_CIPHER_TKIP:
1151 return "TKIP";
1152 case WPA_CIPHER_WEP104:
1153 case WPA_CIPHER_WEP40:
1154 return "WEP";
1155 default:
1156 return "";
1157 }
1158 }
1159
1160
1161 SM_STATE(WPA_PTK, INITIALIZE)
1162 {
1163 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1164 if (sm->Init) {
1165 /* Init flag is not cleared here, so avoid busy
1166 * loop by claiming nothing changed. */
1167 sm->changed = FALSE;
1168 }
1169
1170 sm->keycount = 0;
1171 if (sm->GUpdateStationKeys)
1172 sm->group->GKeyDoneStations--;
1173 sm->GUpdateStationKeys = FALSE;
1174 if (sm->wpa == WPA_VERSION_WPA)
1175 sm->PInitAKeys = FALSE;
1176 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1177 * Local AA > Remote AA)) */) {
1178 sm->Pair = TRUE;
1179 }
1180 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1181 wpa_remove_ptk(sm);
1182 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1183 sm->TimeoutCtr = 0;
1184 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1185 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1186 WPA_EAPOL_authorized, 0);
1187 }
1188 }
1189
1190
1191 SM_STATE(WPA_PTK, DISCONNECT)
1192 {
1193 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1194 sm->Disconnect = FALSE;
1195 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1196 }
1197
1198
1199 SM_STATE(WPA_PTK, DISCONNECTED)
1200 {
1201 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1202 sm->DeauthenticationRequest = FALSE;
1203 }
1204
1205
1206 SM_STATE(WPA_PTK, AUTHENTICATION)
1207 {
1208 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1209 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1210 sm->PTK_valid = FALSE;
1211 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1212 1);
1213 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1214 sm->AuthenticationRequest = FALSE;
1215 }
1216
1217
1218 SM_STATE(WPA_PTK, AUTHENTICATION2)
1219 {
1220 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1221 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1222 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1223 sm->ReAuthenticationRequest = FALSE;
1224 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1225 * logical place than INITIALIZE since AUTHENTICATION2 can be
1226 * re-entered on ReAuthenticationRequest without going through
1227 * INITIALIZE. */
1228 sm->TimeoutCtr = 0;
1229 }
1230
1231
1232 SM_STATE(WPA_PTK, INITPMK)
1233 {
1234 u8 msk[2 * PMK_LEN];
1235 size_t len = 2 * PMK_LEN;
1236
1237 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1238 #ifdef CONFIG_IEEE80211R
1239 sm->xxkey_len = 0;
1240 #endif /* CONFIG_IEEE80211R */
1241 if (sm->pmksa) {
1242 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1243 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1244 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1245 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1246 "(len=%lu)", (unsigned long) len);
1247 os_memcpy(sm->PMK, msk, PMK_LEN);
1248 #ifdef CONFIG_IEEE80211R
1249 if (len >= 2 * PMK_LEN) {
1250 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1251 sm->xxkey_len = PMK_LEN;
1252 }
1253 #endif /* CONFIG_IEEE80211R */
1254 } else {
1255 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1256 }
1257
1258 sm->req_replay_counter_used = 0;
1259 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1260 * will break reauthentication since EAPOL state machines may not be
1261 * get into AUTHENTICATING state that clears keyRun before WPA state
1262 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1263 * state and takes PMK from the previously used AAA Key. This will
1264 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1265 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1266 * be good workaround for this issue. */
1267 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1268 }
1269
1270
1271 SM_STATE(WPA_PTK, INITPSK)
1272 {
1273 const u8 *psk;
1274 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1275 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1276 if (psk) {
1277 os_memcpy(sm->PMK, psk, PMK_LEN);
1278 #ifdef CONFIG_IEEE80211R
1279 os_memcpy(sm->xxkey, psk, PMK_LEN);
1280 sm->xxkey_len = PMK_LEN;
1281 #endif /* CONFIG_IEEE80211R */
1282 }
1283 sm->req_replay_counter_used = 0;
1284 }
1285
1286
1287 SM_STATE(WPA_PTK, PTKSTART)
1288 {
1289 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1290 size_t pmkid_len = 0;
1291
1292 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1293 sm->PTKRequest = FALSE;
1294 sm->TimeoutEvt = FALSE;
1295 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1296 "sending 1/4 msg of 4-Way Handshake");
1297 /*
1298 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1299 * one possible PSK for this STA.
1300 */
1301 if (sm->wpa == WPA_VERSION_WPA2 &&
1302 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1303 pmkid = buf;
1304 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1305 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1306 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1307 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1308 if (sm->pmksa)
1309 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1310 sm->pmksa->pmkid, PMKID_LEN);
1311 else {
1312 /*
1313 * Calculate PMKID since no PMKSA cache entry was
1314 * available with pre-calculated PMKID.
1315 */
1316 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1317 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1318 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1319 }
1320 }
1321 wpa_send_eapol(sm->wpa_auth, sm,
1322 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1323 sm->ANonce, pmkid, pmkid_len, 0, 0);
1324 sm->TimeoutCtr++;
1325 }
1326
1327
1328 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1329 struct wpa_ptk *ptk)
1330 {
1331 #ifdef CONFIG_IEEE80211R
1332 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1333 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1334 #endif /* CONFIG_IEEE80211R */
1335
1336 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1337 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1338 (u8 *) ptk, sizeof(*ptk),
1339 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1340
1341 return 0;
1342 }
1343
1344
1345 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1346 {
1347 struct wpa_ptk PTK;
1348 int ok = 0;
1349 const u8 *pmk = NULL;
1350
1351 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1352 sm->EAPOLKeyReceived = FALSE;
1353
1354 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1355 * WPA-PSK: iterate through possible PSKs and select the one matching
1356 * the packet */
1357 for (;;) {
1358 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1359 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1360 if (pmk == NULL)
1361 break;
1362 } else
1363 pmk = sm->PMK;
1364
1365 wpa_derive_ptk(sm, pmk, &PTK);
1366
1367 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1368 sm->last_rx_eapol_key_len) == 0) {
1369 ok = 1;
1370 break;
1371 }
1372
1373 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1374 break;
1375 }
1376
1377 if (!ok) {
1378 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1379 "invalid MIC in msg 2/4 of 4-Way Handshake");
1380 return;
1381 }
1382
1383 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1384
1385 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1386 /* PSK may have changed from the previous choice, so update
1387 * state machine data based on whatever PSK was selected here.
1388 */
1389 os_memcpy(sm->PMK, pmk, PMK_LEN);
1390 }
1391
1392 sm->MICVerified = TRUE;
1393
1394 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1395 sm->PTK_valid = TRUE;
1396 }
1397
1398
1399 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1400 {
1401 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1402 sm->TimeoutCtr = 0;
1403 }
1404
1405
1406 #ifdef CONFIG_IEEE80211W
1407
1408 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1409 {
1410 if (sm->mgmt_frame_prot) {
1411 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1412 }
1413
1414 return 0;
1415 }
1416
1417
1418 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1419 {
1420 struct wpa_igtk_kde igtk;
1421 struct wpa_group *gsm = sm->group;
1422
1423 if (!sm->mgmt_frame_prot)
1424 return pos;
1425
1426 igtk.keyid[0] = gsm->GN_igtk;
1427 igtk.keyid[1] = 0;
1428 if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1429 < 0)
1430 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1431 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1432 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1433 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1434
1435 return pos;
1436 }
1437
1438 #else /* CONFIG_IEEE80211W */
1439
1440 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1441 {
1442 return 0;
1443 }
1444
1445
1446 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1447 {
1448 return pos;
1449 }
1450
1451 #endif /* CONFIG_IEEE80211W */
1452
1453
1454 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1455 {
1456 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1457 size_t gtk_len, kde_len;
1458 struct wpa_group *gsm = sm->group;
1459 u8 *wpa_ie;
1460 int wpa_ie_len, secure, keyidx, encr = 0;
1461
1462 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1463 sm->TimeoutEvt = FALSE;
1464 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1465 */
1466 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1467 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1468 wpa_ie = sm->wpa_auth->wpa_ie;
1469 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1470 if (sm->wpa == WPA_VERSION_WPA &&
1471 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1472 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1473 /* WPA-only STA, remove RSN IE */
1474 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1475 wpa_ie_len = wpa_ie[1] + 2;
1476 }
1477 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1478 "sending 3/4 msg of 4-Way Handshake");
1479 if (sm->wpa == WPA_VERSION_WPA2) {
1480 /* WPA2 send GTK in the 4-way handshake */
1481 secure = 1;
1482 gtk = gsm->GTK[gsm->GN - 1];
1483 gtk_len = gsm->GTK_len;
1484 keyidx = gsm->GN;
1485 _rsc = rsc;
1486 encr = 1;
1487 } else {
1488 /* WPA does not include GTK in msg 3/4 */
1489 secure = 0;
1490 gtk = NULL;
1491 gtk_len = 0;
1492 keyidx = 0;
1493 _rsc = NULL;
1494 }
1495
1496 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1497 if (gtk)
1498 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1499 kde = os_malloc(kde_len);
1500 if (kde == NULL)
1501 return;
1502
1503 pos = kde;
1504 os_memcpy(pos, wpa_ie, wpa_ie_len);
1505 pos += wpa_ie_len;
1506 if (gtk) {
1507 u8 hdr[2];
1508 hdr[0] = keyidx & 0x03;
1509 hdr[1] = 0;
1510 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1511 gtk, gtk_len);
1512 }
1513 pos = ieee80211w_kde_add(sm, pos);
1514
1515 wpa_send_eapol(sm->wpa_auth, sm,
1516 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1517 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1518 WPA_KEY_INFO_KEY_TYPE,
1519 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1520 os_free(kde);
1521 sm->TimeoutCtr++;
1522 }
1523
1524
1525 SM_STATE(WPA_PTK, PTKINITDONE)
1526 {
1527 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1528 sm->EAPOLKeyReceived = FALSE;
1529 if (sm->Pair) {
1530 char *alg;
1531 int klen;
1532 if (sm->pairwise == WPA_CIPHER_TKIP) {
1533 alg = "TKIP";
1534 klen = 32;
1535 } else {
1536 alg = "CCMP";
1537 klen = 16;
1538 }
1539 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1540 sm->PTK.tk1, klen)) {
1541 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1542 return;
1543 }
1544 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1545 sm->pairwise_set = TRUE;
1546
1547 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1548 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1549 WPA_EAPOL_authorized, 1);
1550 }
1551 }
1552
1553 if (0 /* IBSS == TRUE */) {
1554 sm->keycount++;
1555 if (sm->keycount == 2) {
1556 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1557 WPA_EAPOL_portValid, 1);
1558 }
1559 } else {
1560 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1561 1);
1562 }
1563 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1564 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1565 if (sm->wpa == WPA_VERSION_WPA)
1566 sm->PInitAKeys = TRUE;
1567 else
1568 sm->has_GTK = TRUE;
1569 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1570 "pairwise key handshake completed (%s)",
1571 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1572
1573 #ifdef CONFIG_IEEE80211R
1574 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1575 #endif /* CONFIG_IEEE80211R */
1576 }
1577
1578
1579 SM_STEP(WPA_PTK)
1580 {
1581 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1582
1583 if (sm->Init)
1584 SM_ENTER(WPA_PTK, INITIALIZE);
1585 else if (sm->Disconnect
1586 /* || FIX: dot11RSNAConfigSALifetime timeout */)
1587 SM_ENTER(WPA_PTK, DISCONNECT);
1588 else if (sm->DeauthenticationRequest)
1589 SM_ENTER(WPA_PTK, DISCONNECTED);
1590 else if (sm->AuthenticationRequest)
1591 SM_ENTER(WPA_PTK, AUTHENTICATION);
1592 else if (sm->ReAuthenticationRequest)
1593 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1594 else if (sm->PTKRequest)
1595 SM_ENTER(WPA_PTK, PTKSTART);
1596 else switch (sm->wpa_ptk_state) {
1597 case WPA_PTK_INITIALIZE:
1598 break;
1599 case WPA_PTK_DISCONNECT:
1600 SM_ENTER(WPA_PTK, DISCONNECTED);
1601 break;
1602 case WPA_PTK_DISCONNECTED:
1603 SM_ENTER(WPA_PTK, INITIALIZE);
1604 break;
1605 case WPA_PTK_AUTHENTICATION:
1606 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1607 break;
1608 case WPA_PTK_AUTHENTICATION2:
1609 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1610 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1611 WPA_EAPOL_keyRun) > 0)
1612 SM_ENTER(WPA_PTK, INITPMK);
1613 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1614 /* FIX: && 802.1X::keyRun */)
1615 SM_ENTER(WPA_PTK, INITPSK);
1616 break;
1617 case WPA_PTK_INITPMK:
1618 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1619 WPA_EAPOL_keyAvailable) > 0)
1620 SM_ENTER(WPA_PTK, PTKSTART);
1621 else {
1622 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1623 SM_ENTER(WPA_PTK, DISCONNECT);
1624 }
1625 break;
1626 case WPA_PTK_INITPSK:
1627 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1628 SM_ENTER(WPA_PTK, PTKSTART);
1629 else {
1630 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1631 "no PSK configured for the STA");
1632 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1633 SM_ENTER(WPA_PTK, DISCONNECT);
1634 }
1635 break;
1636 case WPA_PTK_PTKSTART:
1637 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1638 sm->EAPOLKeyPairwise)
1639 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1640 else if (sm->TimeoutCtr >
1641 (int) dot11RSNAConfigPairwiseUpdateCount) {
1642 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1643 SM_ENTER(WPA_PTK, DISCONNECT);
1644 } else if (sm->TimeoutEvt)
1645 SM_ENTER(WPA_PTK, PTKSTART);
1646 break;
1647 case WPA_PTK_PTKCALCNEGOTIATING:
1648 if (sm->MICVerified)
1649 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1650 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1651 sm->EAPOLKeyPairwise)
1652 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1653 else if (sm->TimeoutEvt)
1654 SM_ENTER(WPA_PTK, PTKSTART);
1655 break;
1656 case WPA_PTK_PTKCALCNEGOTIATING2:
1657 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1658 break;
1659 case WPA_PTK_PTKINITNEGOTIATING:
1660 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1661 sm->EAPOLKeyPairwise && sm->MICVerified)
1662 SM_ENTER(WPA_PTK, PTKINITDONE);
1663 else if (sm->TimeoutCtr >
1664 (int) dot11RSNAConfigPairwiseUpdateCount) {
1665 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1666 SM_ENTER(WPA_PTK, DISCONNECT);
1667 } else if (sm->TimeoutEvt)
1668 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1669 break;
1670 case WPA_PTK_PTKINITDONE:
1671 break;
1672 }
1673 }
1674
1675
1676 SM_STATE(WPA_PTK_GROUP, IDLE)
1677 {
1678 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1679 if (sm->Init) {
1680 /* Init flag is not cleared here, so avoid busy
1681 * loop by claiming nothing changed. */
1682 sm->changed = FALSE;
1683 }
1684 sm->GTimeoutCtr = 0;
1685 }
1686
1687
1688 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1689 {
1690 u8 rsc[WPA_KEY_RSC_LEN];
1691 struct wpa_group *gsm = sm->group;
1692 u8 *kde, *pos, hdr[2];
1693 size_t kde_len;
1694
1695 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1696 if (sm->wpa == WPA_VERSION_WPA)
1697 sm->PInitAKeys = FALSE;
1698 sm->TimeoutEvt = FALSE;
1699 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1700 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1701 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1702 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1703 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1704 "sending 1/2 msg of Group Key Handshake");
1705
1706 if (sm->wpa == WPA_VERSION_WPA2) {
1707 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1708 ieee80211w_kde_len(sm);
1709 kde = os_malloc(kde_len);
1710 if (kde == NULL)
1711 return;
1712
1713 pos = kde;
1714 hdr[0] = gsm->GN & 0x03;
1715 hdr[1] = 0;
1716 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1717 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1718 pos = ieee80211w_kde_add(sm, pos);
1719 } else {
1720 kde = gsm->GTK[gsm->GN - 1];
1721 pos = kde + gsm->GTK_len;
1722 }
1723
1724 wpa_send_eapol(sm->wpa_auth, sm,
1725 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1726 WPA_KEY_INFO_ACK |
1727 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1728 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1729 if (sm->wpa == WPA_VERSION_WPA2)
1730 os_free(kde);
1731 sm->GTimeoutCtr++;
1732 }
1733
1734
1735 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1736 {
1737 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1738 sm->EAPOLKeyReceived = FALSE;
1739 if (sm->GUpdateStationKeys)
1740 sm->group->GKeyDoneStations--;
1741 sm->GUpdateStationKeys = FALSE;
1742 sm->GTimeoutCtr = 0;
1743 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1744 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1745 "group key handshake completed (%s)",
1746 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1747 sm->has_GTK = TRUE;
1748 }
1749
1750
1751 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1752 {
1753 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1754 if (sm->GUpdateStationKeys)
1755 sm->group->GKeyDoneStations--;
1756 sm->GUpdateStationKeys = FALSE;
1757 sm->Disconnect = TRUE;
1758 }
1759
1760
1761 SM_STEP(WPA_PTK_GROUP)
1762 {
1763 if (sm->Init)
1764 SM_ENTER(WPA_PTK_GROUP, IDLE);
1765 else switch (sm->wpa_ptk_group_state) {
1766 case WPA_PTK_GROUP_IDLE:
1767 if (sm->GUpdateStationKeys ||
1768 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1769 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1770 break;
1771 case WPA_PTK_GROUP_REKEYNEGOTIATING:
1772 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1773 !sm->EAPOLKeyPairwise && sm->MICVerified)
1774 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1775 else if (sm->GTimeoutCtr >
1776 (int) dot11RSNAConfigGroupUpdateCount)
1777 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1778 else if (sm->TimeoutEvt)
1779 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1780 break;
1781 case WPA_PTK_GROUP_KEYERROR:
1782 SM_ENTER(WPA_PTK_GROUP, IDLE);
1783 break;
1784 case WPA_PTK_GROUP_REKEYESTABLISHED:
1785 SM_ENTER(WPA_PTK_GROUP, IDLE);
1786 break;
1787 }
1788 }
1789
1790
1791 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1792 struct wpa_group *group)
1793 {
1794 int ret = 0;
1795
1796 /* FIX: is this the correct way of getting GNonce? */
1797 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1798 inc_byte_array(group->Counter, WPA_NONCE_LEN);
1799 wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1800 group->GTK[group->GN - 1], group->GTK_len);
1801
1802 #ifdef CONFIG_IEEE80211W
1803 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1804 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1805 WPA_IGTK_LEN) < 0) {
1806 wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1807 "IGTK");
1808 ret = -1;
1809 }
1810 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1811 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1812 }
1813 #endif /* CONFIG_IEEE80211W */
1814
1815 return ret;
1816 }
1817
1818
1819 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1820 struct wpa_group *group)
1821 {
1822 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1823 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1824 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1825 group->wpa_group_state = WPA_GROUP_GTK_INIT;
1826
1827 /* GTK[0..N] = 0 */
1828 os_memset(group->GTK, 0, sizeof(group->GTK));
1829 group->GN = 1;
1830 group->GM = 2;
1831 #ifdef CONFIG_IEEE80211W
1832 group->GN_igtk = 4;
1833 group->GM_igtk = 5;
1834 #endif /* CONFIG_IEEE80211W */
1835 /* GTK[GN] = CalcGTK() */
1836 wpa_gtk_update(wpa_auth, group);
1837 }
1838
1839
1840 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1841 {
1842 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1843 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1844 "Not in PTKINITDONE; skip Group Key update");
1845 return 0;
1846 }
1847 sm->group->GKeyDoneStations++;
1848 sm->GUpdateStationKeys = TRUE;
1849 wpa_sm_step(sm);
1850 return 0;
1851 }
1852
1853
1854 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1855 struct wpa_group *group)
1856 {
1857 int tmp;
1858
1859 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1860 "SETKEYS (VLAN-ID %d)", group->vlan_id);
1861 group->changed = TRUE;
1862 group->wpa_group_state = WPA_GROUP_SETKEYS;
1863 group->GTKReKey = FALSE;
1864 tmp = group->GM;
1865 group->GM = group->GN;
1866 group->GN = tmp;
1867 #ifdef CONFIG_IEEE80211W
1868 tmp = group->GM_igtk;
1869 group->GM_igtk = group->GN_igtk;
1870 group->GN_igtk = tmp;
1871 #endif /* CONFIG_IEEE80211W */
1872 /* "GKeyDoneStations = GNoStations" is done in more robust way by
1873 * counting the STAs that are marked with GUpdateStationKeys instead of
1874 * including all STAs that could be in not-yet-completed state. */
1875 wpa_gtk_update(wpa_auth, group);
1876
1877 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1878 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1879 group->GKeyDoneStations);
1880 }
1881
1882
1883 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1884 struct wpa_group *group)
1885 {
1886 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1887 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1888 group->changed = TRUE;
1889 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1890 wpa_auth_set_key(wpa_auth, group->vlan_id,
1891 wpa_alg_txt(wpa_auth->conf.wpa_group),
1892 NULL, group->GN, group->GTK[group->GN - 1],
1893 group->GTK_len);
1894
1895 #ifdef CONFIG_IEEE80211W
1896 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1897 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
1898 NULL, group->GN_igtk,
1899 group->IGTK[group->GN_igtk - 4],
1900 WPA_IGTK_LEN);
1901 }
1902 #endif /* CONFIG_IEEE80211W */
1903 }
1904
1905
1906 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
1907 struct wpa_group *group)
1908 {
1909 if (group->GInit) {
1910 wpa_group_gtk_init(wpa_auth, group);
1911 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
1912 group->GTKAuthenticator) {
1913 wpa_group_setkeysdone(wpa_auth, group);
1914 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
1915 group->GTKReKey) {
1916 wpa_group_setkeys(wpa_auth, group);
1917 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
1918 if (group->GKeyDoneStations == 0)
1919 wpa_group_setkeysdone(wpa_auth, group);
1920 else if (group->GTKReKey)
1921 wpa_group_setkeys(wpa_auth, group);
1922 }
1923 }
1924
1925
1926 static void wpa_sm_step(struct wpa_state_machine *sm)
1927 {
1928 if (sm == NULL)
1929 return;
1930
1931 if (sm->in_step_loop) {
1932 /* This should not happen, but if it does, make sure we do not
1933 * end up freeing the state machine too early by exiting the
1934 * recursive call. */
1935 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
1936 return;
1937 }
1938
1939 sm->in_step_loop = 1;
1940 do {
1941 if (sm->pending_deinit)
1942 break;
1943
1944 sm->changed = FALSE;
1945 sm->wpa_auth->group->changed = FALSE;
1946
1947 SM_STEP_RUN(WPA_PTK);
1948 if (sm->pending_deinit)
1949 break;
1950 SM_STEP_RUN(WPA_PTK_GROUP);
1951 if (sm->pending_deinit)
1952 break;
1953 wpa_group_sm_step(sm->wpa_auth, sm->group);
1954 } while (sm->changed || sm->wpa_auth->group->changed);
1955 sm->in_step_loop = 0;
1956
1957 if (sm->pending_deinit) {
1958 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
1959 "machine deinit for " MACSTR, MAC2STR(sm->addr));
1960 wpa_free_sta_sm(sm);
1961 }
1962 }
1963
1964
1965 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
1966 {
1967 struct wpa_state_machine *sm = eloop_ctx;
1968 wpa_sm_step(sm);
1969 }
1970
1971
1972 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
1973 {
1974 if (sm == NULL)
1975 return;
1976 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
1977 }
1978
1979
1980 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
1981 {
1982 int tmp, i;
1983 struct wpa_group *group;
1984
1985 if (wpa_auth == NULL)
1986 return;
1987
1988 group = wpa_auth->group;
1989
1990 for (i = 0; i < 2; i++) {
1991 tmp = group->GM;
1992 group->GM = group->GN;
1993 group->GN = tmp;
1994 #ifdef CONFIG_IEEE80211W
1995 tmp = group->GM_igtk;
1996 group->GM_igtk = group->GN_igtk;
1997 group->GN_igtk = tmp;
1998 #endif /* CONFIG_IEEE80211W */
1999 wpa_gtk_update(wpa_auth, group);
2000 }
2001 }
2002
2003
2004 static const char * wpa_bool_txt(int bool)
2005 {
2006 return bool ? "TRUE" : "FALSE";
2007 }
2008
2009
2010 static int wpa_cipher_bits(int cipher)
2011 {
2012 switch (cipher) {
2013 case WPA_CIPHER_CCMP:
2014 return 128;
2015 case WPA_CIPHER_TKIP:
2016 return 256;
2017 case WPA_CIPHER_WEP104:
2018 return 104;
2019 case WPA_CIPHER_WEP40:
2020 return 40;
2021 default:
2022 return 0;
2023 }
2024 }
2025
2026
2027 #define RSN_SUITE "%02x-%02x-%02x-%d"
2028 #define RSN_SUITE_ARG(s) \
2029 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2030
2031 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2032 {
2033 int len = 0, ret;
2034 char pmkid_txt[PMKID_LEN * 2 + 1];
2035
2036 if (wpa_auth == NULL)
2037 return len;
2038
2039 ret = os_snprintf(buf + len, buflen - len,
2040 "dot11RSNAOptionImplemented=TRUE\n"
2041 #ifdef CONFIG_RSN_PREAUTH
2042 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2043 #else /* CONFIG_RSN_PREAUTH */
2044 "dot11RSNAPreauthenticationImplemented=FALSE\n"
2045 #endif /* CONFIG_RSN_PREAUTH */
2046 "dot11RSNAEnabled=%s\n"
2047 "dot11RSNAPreauthenticationEnabled=%s\n",
2048 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2049 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2050 if (ret < 0 || (size_t) ret >= buflen - len)
2051 return len;
2052 len += ret;
2053
2054 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2055 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2056
2057 ret = os_snprintf(
2058 buf + len, buflen - len,
2059 "dot11RSNAConfigVersion=%u\n"
2060 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2061 /* FIX: dot11RSNAConfigGroupCipher */
2062 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2063 /* FIX: dot11RSNAConfigGroupRekeyTime */
2064 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2065 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2066 "dot11RSNAConfigGroupUpdateCount=%u\n"
2067 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2068 "dot11RSNAConfigGroupCipherSize=%u\n"
2069 "dot11RSNAConfigPMKLifetime=%u\n"
2070 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2071 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2072 "dot11RSNAConfigSATimeout=%u\n"
2073 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2074 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2075 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2076 "dot11RSNAPMKIDUsed=%s\n"
2077 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2078 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2079 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2080 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2081 "dot11RSNA4WayHandshakeFailures=%u\n"
2082 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2083 RSN_VERSION,
2084 !!wpa_auth->conf.wpa_strict_rekey,
2085 dot11RSNAConfigGroupUpdateCount,
2086 dot11RSNAConfigPairwiseUpdateCount,
2087 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2088 dot11RSNAConfigPMKLifetime,
2089 dot11RSNAConfigPMKReauthThreshold,
2090 dot11RSNAConfigSATimeout,
2091 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2092 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2093 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2094 pmkid_txt,
2095 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2096 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2097 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2098 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2099 wpa_auth->dot11RSNA4WayHandshakeFailures);
2100 if (ret < 0 || (size_t) ret >= buflen - len)
2101 return len;
2102 len += ret;
2103
2104 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2105 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2106
2107 /* Private MIB */
2108 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2109 wpa_auth->group->wpa_group_state);
2110 if (ret < 0 || (size_t) ret >= buflen - len)
2111 return len;
2112 len += ret;
2113
2114 return len;
2115 }
2116
2117
2118 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2119 {
2120 int len = 0, ret;
2121 u32 pairwise = 0;
2122
2123 if (sm == NULL)
2124 return 0;
2125
2126 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2127
2128 /* dot11RSNAStatsEntry */
2129
2130 if (sm->wpa == WPA_VERSION_WPA) {
2131 if (sm->pairwise == WPA_CIPHER_CCMP)
2132 pairwise = WPA_CIPHER_SUITE_CCMP;
2133 else if (sm->pairwise == WPA_CIPHER_TKIP)
2134 pairwise = WPA_CIPHER_SUITE_TKIP;
2135 else if (sm->pairwise == WPA_CIPHER_WEP104)
2136 pairwise = WPA_CIPHER_SUITE_WEP104;
2137 else if (sm->pairwise == WPA_CIPHER_WEP40)
2138 pairwise = WPA_CIPHER_SUITE_WEP40;
2139 else if (sm->pairwise == WPA_CIPHER_NONE)
2140 pairwise = WPA_CIPHER_SUITE_NONE;
2141 } else if (sm->wpa == WPA_VERSION_WPA2) {
2142 if (sm->pairwise == WPA_CIPHER_CCMP)
2143 pairwise = RSN_CIPHER_SUITE_CCMP;
2144 else if (sm->pairwise == WPA_CIPHER_TKIP)
2145 pairwise = RSN_CIPHER_SUITE_TKIP;
2146 else if (sm->pairwise == WPA_CIPHER_WEP104)
2147 pairwise = RSN_CIPHER_SUITE_WEP104;
2148 else if (sm->pairwise == WPA_CIPHER_WEP40)
2149 pairwise = RSN_CIPHER_SUITE_WEP40;
2150 else if (sm->pairwise == WPA_CIPHER_NONE)
2151 pairwise = RSN_CIPHER_SUITE_NONE;
2152 } else
2153 return 0;
2154
2155 ret = os_snprintf(
2156 buf + len, buflen - len,
2157 /* TODO: dot11RSNAStatsIndex */
2158 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2159 "dot11RSNAStatsVersion=1\n"
2160 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2161 /* TODO: dot11RSNAStatsTKIPICVErrors */
2162 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2163 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2164 /* TODO: dot11RSNAStatsCCMPReplays */
2165 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2166 /* TODO: dot11RSNAStatsTKIPReplays */,
2167 MAC2STR(sm->addr),
2168 RSN_SUITE_ARG(pairwise),
2169 sm->dot11RSNAStatsTKIPLocalMICFailures,
2170 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2171 if (ret < 0 || (size_t) ret >= buflen - len)
2172 return len;
2173 len += ret;
2174
2175 /* Private MIB */
2176 ret = os_snprintf(buf + len, buflen - len,
2177 "hostapdWPAPTKState=%d\n"
2178 "hostapdWPAPTKGroupState=%d\n",
2179 sm->wpa_ptk_state,
2180 sm->wpa_ptk_group_state);
2181 if (ret < 0 || (size_t) ret >= buflen - len)
2182 return len;
2183 len += ret;
2184
2185 return len;
2186 }
2187
2188
2189 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2190 {
2191 if (wpa_auth)
2192 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2193 }
2194
2195
2196 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2197 {
2198 return sm && sm->pairwise_set;
2199 }
2200
2201
2202 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2203 {
2204 if (sm == NULL)
2205 return -1;
2206 return sm->wpa_key_mgmt;
2207 }
2208
2209
2210 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2211 {
2212 if (sm == NULL)
2213 return 0;
2214 return sm->wpa;
2215 }
2216
2217
2218 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2219 struct rsn_pmksa_cache_entry *entry)
2220 {
2221 if (sm == NULL || sm->pmksa != entry)
2222 return -1;
2223 sm->pmksa = NULL;
2224 return 0;
2225 }
2226
2227
2228 struct rsn_pmksa_cache_entry *
2229 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2230 {
2231 return sm ? sm->pmksa : NULL;
2232 }
2233
2234
2235 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2236 {
2237 if (sm)
2238 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2239 }
2240
2241
2242 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2243 {
2244 if (wpa_auth == NULL)
2245 return NULL;
2246 *len = wpa_auth->wpa_ie_len;
2247 return wpa_auth->wpa_ie;
2248 }
2249
2250
2251 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2252 int session_timeout, struct eapol_state_machine *eapol)
2253 {
2254 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2255 return -1;
2256
2257 if (pmksa_cache_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2258 sm->wpa_auth->addr, sm->addr, session_timeout,
2259 eapol, sm->wpa_key_mgmt))
2260 return 0;
2261
2262 return -1;
2263 }
2264
2265
2266 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2267 const u8 *pmk, size_t len, const u8 *sta_addr,
2268 int session_timeout,
2269 struct eapol_state_machine *eapol)
2270 {
2271 if (wpa_auth == NULL)
2272 return -1;
2273
2274 if (pmksa_cache_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2275 sta_addr, session_timeout, eapol,
2276 WPA_KEY_MGMT_IEEE8021X))
2277 return 0;
2278
2279 return -1;
2280 }
2281
2282
2283 static struct wpa_group *
2284 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2285 {
2286 struct wpa_group *group;
2287
2288 if (wpa_auth == NULL || wpa_auth->group == NULL)
2289 return NULL;
2290
2291 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2292 vlan_id);
2293 group = wpa_group_init(wpa_auth, vlan_id);
2294 if (group == NULL)
2295 return NULL;
2296
2297 group->next = wpa_auth->group->next;
2298 wpa_auth->group->next = group;
2299
2300 return group;
2301 }
2302
2303
2304 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2305 {
2306 struct wpa_group *group;
2307
2308 if (sm == NULL || sm->wpa_auth == NULL)
2309 return 0;
2310
2311 group = sm->wpa_auth->group;
2312 while (group) {
2313 if (group->vlan_id == vlan_id)
2314 break;
2315 group = group->next;
2316 }
2317
2318 if (group == NULL) {
2319 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2320 if (group == NULL)
2321 return -1;
2322 }
2323
2324 if (sm->group == group)
2325 return 0;
2326
2327 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2328 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2329
2330 sm->group = group;
2331 return 0;
2332 }
2333
2334 #endif /* CONFIG_NATIVE_WINDOWS */
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