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[netbsd-mini2440.git] / dist / wpa / hostapd / wpa.c
blob4502808542bd0615c3610d73ff3f3ddd8b9ec1c3
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 "rc4.h"
25 #include "aes_wrap.h"
26 #include "crypto.h"
27 #include "eloop.h"
28 #include "ieee802_11.h"
29 #include "pmksa_cache.h"
30 #include "state_machine.h"
31 #include "wpa_auth_i.h"
32 #include "wpa_auth_ie.h"
33
34 #define STATE_MACHINE_DATA struct wpa_state_machine
35 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
36 #define STATE_MACHINE_ADDR sm->addr
37
38
39 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
40 static void wpa_sm_step(struct wpa_state_machine *sm);
41 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
42 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
43 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
44 struct wpa_group *group);
45
46 /* Default timeouts are 100 ms, but this seems to be a bit too fast for most
47 * WPA Supplicants, so use a bit longer timeout. */
48 static const u32 dot11RSNAConfigGroupUpdateTimeOut = 1000; /* ms */
49 static const u32 dot11RSNAConfigGroupUpdateCount = 3;
50 static const u32 dot11RSNAConfigPairwiseUpdateTimeOut = 1000; /* ms */
51 static const u32 dot11RSNAConfigPairwiseUpdateCount = 3;
52
53 /* TODO: make these configurable */
54 static const int dot11RSNAConfigPMKLifetime = 43200;
55 static const int dot11RSNAConfigPMKReauthThreshold = 70;
56 static const int dot11RSNAConfigSATimeout = 60;
57
58
59 static inline void wpa_auth_mic_failure_report(
60 struct wpa_authenticator *wpa_auth, const u8 *addr)
61 {
62 if (wpa_auth->cb.mic_failure_report)
63 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
64 }
65
66
67 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
68 const u8 *addr, wpa_eapol_variable var,
69 int value)
70 {
71 if (wpa_auth->cb.set_eapol)
72 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
73 }
74
75
76 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
77 const u8 *addr, wpa_eapol_variable var)
78 {
79 if (wpa_auth->cb.get_eapol == NULL)
80 return -1;
81 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
82 }
83
84
85 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
86 const u8 *addr, const u8 *prev_psk)
87 {
88 if (wpa_auth->cb.get_psk == NULL)
89 return NULL;
90 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
91 }
92
93
94 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
95 const u8 *addr, u8 *msk, size_t *len)
96 {
97 if (wpa_auth->cb.get_msk == NULL)
98 return -1;
99 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
100 }
101
102
103 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
104 int vlan_id,
105 const char *alg, const u8 *addr, int idx,
106 u8 *key, size_t key_len)
107 {
108 if (wpa_auth->cb.set_key == NULL)
109 return -1;
110 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
111 key, key_len);
112 }
113
114
115 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
116 const u8 *addr, int idx, u8 *seq)
117 {
118 if (wpa_auth->cb.get_seqnum == NULL)
119 return -1;
120 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
121 }
122
123
124 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
125 const u8 *addr, int idx, u8 *seq)
126 {
127 if (wpa_auth->cb.get_seqnum_igtk == NULL)
128 return -1;
129 return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
130 }
131
132
133 static inline int
134 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
135 const u8 *data, size_t data_len, int encrypt)
136 {
137 if (wpa_auth->cb.send_eapol == NULL)
138 return -1;
139 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
140 encrypt);
141 }
142
143
144 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
145 int (*cb)(struct wpa_state_machine *sm, void *ctx),
146 void *cb_ctx)
147 {
148 if (wpa_auth->cb.for_each_sta == NULL)
149 return 0;
150 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
151 }
152
153
154 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
155 int (*cb)(struct wpa_authenticator *a, void *ctx),
156 void *cb_ctx)
157 {
158 if (wpa_auth->cb.for_each_auth == NULL)
159 return 0;
160 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
161 }
162
163
164 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
165 logger_level level, const char *txt)
166 {
167 if (wpa_auth->cb.logger == NULL)
168 return;
169 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
170 }
171
172
173 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
174 logger_level level, const char *fmt, ...)
175 {
176 char *format;
177 int maxlen;
178 va_list ap;
179
180 if (wpa_auth->cb.logger == NULL)
181 return;
182
183 maxlen = os_strlen(fmt) + 100;
184 format = os_malloc(maxlen);
185 if (!format)
186 return;
187
188 va_start(ap, fmt);
189 vsnprintf(format, maxlen, fmt, ap);
190 va_end(ap);
191
192 wpa_auth_logger(wpa_auth, addr, level, format);
193
194 os_free(format);
195 }
196
197
198 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
199 const u8 *addr)
200 {
201 if (wpa_auth->cb.disconnect == NULL)
202 return;
203 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
204 WLAN_REASON_PREV_AUTH_NOT_VALID);
205 }
206
207
208 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
209 {
210 #ifdef CONFIG_IEEE80211R
211 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X ||
212 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK;
213 #else /* CONFIG_IEEE80211R */
214 return 0;
215 #endif /* CONFIG_IEEE80211R */
216 }
217
218
219 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
220 {
221 struct wpa_authenticator *wpa_auth = eloop_ctx;
222
223 if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
224 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
225 "initialization.");
226 } else {
227 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
228 }
229
230 if (wpa_auth->conf.wpa_gmk_rekey) {
231 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
232 wpa_rekey_gmk, wpa_auth, NULL);
233 }
234 }
235
236
237 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
238 {
239 struct wpa_authenticator *wpa_auth = eloop_ctx;
240 struct wpa_group *group;
241
242 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
243 for (group = wpa_auth->group; group; group = group->next) {
244 group->GTKReKey = TRUE;
245 do {
246 group->changed = FALSE;
247 wpa_group_sm_step(wpa_auth, group);
248 } while (group->changed);
249 }
250
251 if (wpa_auth->conf.wpa_group_rekey) {
252 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
253 0, wpa_rekey_gtk, wpa_auth, NULL);
254 }
255 }
256
257
258 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
259 {
260 if (sm->pmksa == ctx)
261 sm->pmksa = NULL;
262 return 0;
263 }
264
265
266 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
267 void *ctx)
268 {
269 struct wpa_authenticator *wpa_auth = ctx;
270 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
271 }
272
273
274 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
275 int vlan_id)
276 {
277 struct wpa_group *group;
278 u8 buf[ETH_ALEN + 8 + sizeof(group)];
279 u8 rkey[32];
280
281 group = os_zalloc(sizeof(struct wpa_group));
282 if (group == NULL)
283 return NULL;
284
285 group->GTKAuthenticator = TRUE;
286 group->vlan_id = vlan_id;
287
288 switch (wpa_auth->conf.wpa_group) {
289 case WPA_CIPHER_CCMP:
290 group->GTK_len = 16;
291 break;
292 case WPA_CIPHER_TKIP:
293 group->GTK_len = 32;
294 break;
295 case WPA_CIPHER_WEP104:
296 group->GTK_len = 13;
297 break;
298 case WPA_CIPHER_WEP40:
299 group->GTK_len = 5;
300 break;
301 }
302
303 /* Counter = PRF-256(Random number, "Init Counter",
304 * Local MAC Address || Time)
305 */
306 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
307 wpa_get_ntp_timestamp(buf + ETH_ALEN);
308 os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
309 if (os_get_random(rkey, sizeof(rkey)) ||
310 os_get_random(group->GMK, WPA_GMK_LEN)) {
311 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
312 "initialization.");
313 os_free(group);
314 return NULL;
315 }
316
317 sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
318 group->Counter, WPA_NONCE_LEN);
319
320 group->GInit = TRUE;
321 wpa_group_sm_step(wpa_auth, group);
322 group->GInit = FALSE;
323 wpa_group_sm_step(wpa_auth, group);
324
325 return group;
326 }
327
328
329 /**
330 * wpa_init - Initialize WPA authenticator
331 * @addr: Authenticator address
332 * @conf: Configuration for WPA authenticator
333 * Returns: Pointer to WPA authenticator data or %NULL on failure
334 */
335 struct wpa_authenticator * wpa_init(const u8 *addr,
336 struct wpa_auth_config *conf,
337 struct wpa_auth_callbacks *cb)
338 {
339 struct wpa_authenticator *wpa_auth;
340
341 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
342 if (wpa_auth == NULL)
343 return NULL;
344 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
345 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
346 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
347
348 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
349 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
350 os_free(wpa_auth);
351 return NULL;
352 }
353
354 wpa_auth->group = wpa_group_init(wpa_auth, 0);
355 if (wpa_auth->group == NULL) {
356 os_free(wpa_auth->wpa_ie);
357 os_free(wpa_auth);
358 return NULL;
359 }
360
361 wpa_auth->pmksa = pmksa_cache_init(wpa_auth_pmksa_free_cb, wpa_auth);
362 if (wpa_auth->pmksa == NULL) {
363 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
364 os_free(wpa_auth->wpa_ie);
365 os_free(wpa_auth);
366 return NULL;
367 }
368
369 #ifdef CONFIG_IEEE80211R
370 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
371 if (wpa_auth->ft_pmk_cache == NULL) {
372 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
373 os_free(wpa_auth->wpa_ie);
374 pmksa_cache_deinit(wpa_auth->pmksa);
375 os_free(wpa_auth);
376 return NULL;
377 }
378 #endif /* CONFIG_IEEE80211R */
379
380 if (wpa_auth->conf.wpa_gmk_rekey) {
381 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
382 wpa_rekey_gmk, wpa_auth, NULL);
383 }
384
385 if (wpa_auth->conf.wpa_group_rekey) {
386 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
387 wpa_rekey_gtk, wpa_auth, NULL);
388 }
389
390 return wpa_auth;
391 }
392
393
394 /**
395 * wpa_deinit - Deinitialize WPA authenticator
396 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
397 */
398 void wpa_deinit(struct wpa_authenticator *wpa_auth)
399 {
400 struct wpa_group *group, *prev;
401
402 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
403 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
404
405 #ifdef CONFIG_PEERKEY
406 while (wpa_auth->stsl_negotiations)
407 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
408 #endif /* CONFIG_PEERKEY */
409
410 pmksa_cache_deinit(wpa_auth->pmksa);
411
412 #ifdef CONFIG_IEEE80211R
413 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
414 wpa_auth->ft_pmk_cache = NULL;
415 #endif /* CONFIG_IEEE80211R */
416
417 os_free(wpa_auth->wpa_ie);
418
419 group = wpa_auth->group;
420 while (group) {
421 prev = group;
422 group = group->next;
423 os_free(prev);
424 }
425
426 os_free(wpa_auth);
427 }
428
429
430 /**
431 * wpa_reconfig - Update WPA authenticator configuration
432 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
433 * @conf: Configuration for WPA authenticator
434 */
435 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
436 struct wpa_auth_config *conf)
437 {
438 if (wpa_auth == NULL)
439 return 0;
440
441 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
442 /*
443 * TODO:
444 * Disassociate stations if configuration changed
445 * Update WPA/RSN IE
446 */
447 return 0;
448 }
449
450
451 struct wpa_state_machine *
452 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
453 {
454 struct wpa_state_machine *sm;
455
456 sm = os_zalloc(sizeof(struct wpa_state_machine));
457 if (sm == NULL)
458 return NULL;
459 os_memcpy(sm->addr, addr, ETH_ALEN);
460
461 sm->wpa_auth = wpa_auth;
462 sm->group = wpa_auth->group;
463
464 return sm;
465 }
466
467
468 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
469 struct wpa_state_machine *sm)
470 {
471 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
472 return;
473
474 #ifdef CONFIG_IEEE80211R
475 if (sm->ft_completed) {
476 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
477 "FT authentication already completed - do not "
478 "start 4-way handshake");
479 return;
480 }
481 #endif /* CONFIG_IEEE80211R */
482
483 if (sm->started) {
484 os_memset(sm->key_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
485 sm->ReAuthenticationRequest = TRUE;
486 wpa_sm_step(sm);
487 return;
488 }
489
490 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
491 "start authentication");
492 sm->started = 1;
493
494 sm->Init = TRUE;
495 wpa_sm_step(sm);
496 sm->Init = FALSE;
497 sm->AuthenticationRequest = TRUE;
498 wpa_sm_step(sm);
499 }
500
501
502 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
503 {
504 os_free(sm->last_rx_eapol_key);
505 os_free(sm->wpa_ie);
506 os_free(sm);
507 }
508
509
510 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
511 {
512 if (sm == NULL)
513 return;
514
515 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
516 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
517 "strict rekeying - force GTK rekey since STA "
518 "is leaving");
519 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
520 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
521 NULL);
522 }
523
524 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
525 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
526 if (sm->in_step_loop) {
527 /* Must not free state machine while wpa_sm_step() is running.
528 * Freeing will be completed in the end of wpa_sm_step(). */
529 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
530 "machine deinit for " MACSTR, MAC2STR(sm->addr));
531 sm->pending_deinit = 1;
532 } else
533 wpa_free_sta_sm(sm);
534 }
535
536
537 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
538 {
539 if (sm == NULL)
540 return;
541
542 sm->PTKRequest = TRUE;
543 sm->PTK_valid = 0;
544 }
545
546
547 void wpa_receive(struct wpa_authenticator *wpa_auth,
548 struct wpa_state_machine *sm,
549 u8 *data, size_t data_len)
550 {
551 struct ieee802_1x_hdr *hdr;
552 struct wpa_eapol_key *key;
553 u16 key_info, key_data_length;
554 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
555 SMK_M1, SMK_M3, SMK_ERROR } msg;
556 char *msgtxt;
557 struct wpa_eapol_ie_parse kde;
558
559 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
560 return;
561
562 if (data_len < sizeof(*hdr) + sizeof(*key))
563 return;
564
565 hdr = (struct ieee802_1x_hdr *) data;
566 key = (struct wpa_eapol_key *) (hdr + 1);
567 key_info = WPA_GET_BE16(key->key_info);
568 key_data_length = WPA_GET_BE16(key->key_data_length);
569 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
570 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
571 "key_data overflow (%d > %lu)",
572 key_data_length,
573 (unsigned long) (data_len - sizeof(*hdr) -
574 sizeof(*key)));
575 return;
576 }
577
578 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
579 * are set */
580
581 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
582 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
583 if (key_info & WPA_KEY_INFO_ERROR) {
584 msg = SMK_ERROR;
585 msgtxt = "SMK Error";
586 } else {
587 msg = SMK_M1;
588 msgtxt = "SMK M1";
589 }
590 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
591 msg = SMK_M3;
592 msgtxt = "SMK M3";
593 } else if (key_info & WPA_KEY_INFO_REQUEST) {
594 msg = REQUEST;
595 msgtxt = "Request";
596 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
597 msg = GROUP_2;
598 msgtxt = "2/2 Group";
599 } else if (key_data_length == 0) {
600 msg = PAIRWISE_4;
601 msgtxt = "4/4 Pairwise";
602 } else {
603 msg = PAIRWISE_2;
604 msgtxt = "2/4 Pairwise";
605 }
606
607 /* TODO: key_info type validation for PeerKey */
608 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
609 msg == GROUP_2) {
610 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
611 if (sm->pairwise == WPA_CIPHER_CCMP) {
612 if (wpa_use_aes_cmac(sm) &&
613 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
614 wpa_auth_logger(wpa_auth, sm->addr,
615 LOGGER_WARNING,
616 "advertised support for "
617 "AES-128-CMAC, but did not "
618 "use it");
619 return;
620 }
621
622 if (!wpa_use_aes_cmac(sm) &&
623 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
624 wpa_auth_logger(wpa_auth, sm->addr,
625 LOGGER_WARNING,
626 "did not use HMAC-SHA1-AES "
627 "with CCMP");
628 return;
629 }
630 }
631 }
632
633 if (key_info & WPA_KEY_INFO_REQUEST) {
634 if (sm->req_replay_counter_used &&
635 os_memcmp(key->replay_counter, sm->req_replay_counter,
636 WPA_REPLAY_COUNTER_LEN) <= 0) {
637 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
638 "received EAPOL-Key request with "
639 "replayed counter");
640 return;
641 }
642 }
643
644 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
645 (!sm->key_replay_counter_valid ||
646 os_memcmp(key->replay_counter, sm->key_replay_counter,
647 WPA_REPLAY_COUNTER_LEN) != 0)) {
648 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
649 "received EAPOL-Key %s with unexpected "
650 "replay counter", msgtxt);
651 wpa_hexdump(MSG_DEBUG, "expected replay counter",
652 sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
653 wpa_hexdump(MSG_DEBUG, "received replay counter",
654 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
655 return;
656 }
657
658 switch (msg) {
659 case PAIRWISE_2:
660 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
661 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
662 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
663 "received EAPOL-Key msg 2/4 in "
664 "invalid state (%d) - dropped",
665 sm->wpa_ptk_state);
666 return;
667 }
668 if (sm->wpa_ie == NULL ||
669 sm->wpa_ie_len != key_data_length ||
670 os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
671 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
672 "WPA IE from (Re)AssocReq did not "
673 "match with msg 2/4");
674 if (sm->wpa_ie) {
675 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
676 sm->wpa_ie, sm->wpa_ie_len);
677 }
678 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
679 (u8 *) (key + 1), key_data_length);
680 /* MLME-DEAUTHENTICATE.request */
681 wpa_sta_disconnect(wpa_auth, sm->addr);
682 return;
683 }
684 break;
685 case PAIRWISE_4:
686 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
687 !sm->PTK_valid) {
688 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
689 "received EAPOL-Key msg 4/4 in "
690 "invalid state (%d) - dropped",
691 sm->wpa_ptk_state);
692 return;
693 }
694 break;
695 case GROUP_2:
696 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
697 || !sm->PTK_valid) {
698 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
699 "received EAPOL-Key msg 2/2 in "
700 "invalid state (%d) - dropped",
701 sm->wpa_ptk_group_state);
702 return;
703 }
704 break;
705 #ifdef CONFIG_PEERKEY
706 case SMK_M1:
707 case SMK_M3:
708 case SMK_ERROR:
709 if (!wpa_auth->conf.peerkey) {
710 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
711 "PeerKey use disabled - ignoring message");
712 return;
713 }
714 if (!sm->PTK_valid) {
715 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
716 "received EAPOL-Key msg SMK in "
717 "invalid state - dropped");
718 return;
719 }
720 break;
721 #else /* CONFIG_PEERKEY */
722 case SMK_M1:
723 case SMK_M3:
724 case SMK_ERROR:
725 return; /* STSL disabled - ignore SMK messages */
726 #endif /* CONFIG_PEERKEY */
727 case REQUEST:
728 break;
729 }
730
731 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
732 "received EAPOL-Key frame (%s)", msgtxt);
733
734 if (key_info & WPA_KEY_INFO_ACK) {
735 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
736 "received invalid EAPOL-Key: Key Ack set");
737 return;
738 }
739
740 if (!(key_info & WPA_KEY_INFO_MIC)) {
741 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
742 "received invalid EAPOL-Key: Key MIC not set");
743 return;
744 }
745
746 sm->MICVerified = FALSE;
747 if (sm->PTK_valid) {
748 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
749 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
750 "received EAPOL-Key with invalid MIC");
751 return;
752 }
753 sm->MICVerified = TRUE;
754 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
755 }
756
757 if (key_info & WPA_KEY_INFO_REQUEST) {
758 if (sm->MICVerified) {
759 sm->req_replay_counter_used = 1;
760 os_memcpy(sm->req_replay_counter, key->replay_counter,
761 WPA_REPLAY_COUNTER_LEN);
762 } else {
763 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
764 "received EAPOL-Key request with "
765 "invalid MIC");
766 return;
767 }
768
769 /*
770 * TODO: should decrypt key data field if encryption was used;
771 * even though MAC address KDE is not normally encrypted,
772 * supplicant is allowed to encrypt it.
773 */
774 if (msg == SMK_ERROR) {
775 #ifdef CONFIG_PEERKEY
776 wpa_smk_error(wpa_auth, sm, key);
777 #endif /* CONFIG_PEERKEY */
778 return;
779 } else if (key_info & WPA_KEY_INFO_ERROR) {
780 /* Supplicant reported a Michael MIC error */
781 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
782 "received EAPOL-Key Error Request "
783 "(STA detected Michael MIC failure)");
784 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
785 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
786 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
787 /* Error report is not a request for a new key
788 * handshake, but since Authenticator may do it, let's
789 * change the keys now anyway. */
790 wpa_request_new_ptk(sm);
791 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
792 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
793 "received EAPOL-Key Request for new "
794 "4-Way Handshake");
795 wpa_request_new_ptk(sm);
796 #ifdef CONFIG_PEERKEY
797 } else if (msg == SMK_M1) {
798 wpa_smk_m1(wpa_auth, sm, key);
799 #endif /* CONFIG_PEERKEY */
800 } else if (key_data_length > 0 &&
801 wpa_parse_kde_ies((const u8 *) (key + 1),
802 key_data_length, &kde) == 0 &&
803 kde.mac_addr) {
804 } else {
805 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
806 "received EAPOL-Key Request for GTK "
807 "rekeying");
808 /* FIX: why was this triggering PTK rekeying for the
809 * STA that requested Group Key rekeying?? */
810 /* wpa_request_new_ptk(sta->wpa_sm); */
811 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
812 wpa_rekey_gtk(wpa_auth, NULL);
813 }
814 } else {
815 /* Do not allow the same key replay counter to be reused. */
816 sm->key_replay_counter_valid = FALSE;
817 }
818
819 #ifdef CONFIG_PEERKEY
820 if (msg == SMK_M3) {
821 wpa_smk_m3(wpa_auth, sm, key);
822 return;
823 }
824 #endif /* CONFIG_PEERKEY */
825
826 os_free(sm->last_rx_eapol_key);
827 sm->last_rx_eapol_key = os_malloc(data_len);
828 if (sm->last_rx_eapol_key == NULL)
829 return;
830 os_memcpy(sm->last_rx_eapol_key, data, data_len);
831 sm->last_rx_eapol_key_len = data_len;
832
833 sm->EAPOLKeyReceived = TRUE;
834 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
835 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
836 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
837 wpa_sm_step(sm);
838 }
839
840
841 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
842 u8 *gtk, size_t gtk_len)
843 {
844 u8 data[ETH_ALEN + WPA_NONCE_LEN];
845
846 /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
847 os_memcpy(data, addr, ETH_ALEN);
848 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
849
850 sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
851 data, sizeof(data), gtk, gtk_len);
852
853 wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
854 wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
855 }
856
857
858 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
859 {
860 struct wpa_authenticator *wpa_auth = eloop_ctx;
861 struct wpa_state_machine *sm = timeout_ctx;
862
863 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
864 sm->TimeoutEvt = TRUE;
865 wpa_sm_step(sm);
866 }
867
868
869 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
870 struct wpa_state_machine *sm, int key_info,
871 const u8 *key_rsc, const u8 *nonce,
872 const u8 *kde, size_t kde_len,
873 int keyidx, int encr, int force_version)
874 {
875 struct ieee802_1x_hdr *hdr;
876 struct wpa_eapol_key *key;
877 size_t len;
878 int alg;
879 int key_data_len, pad_len = 0;
880 u8 *buf, *pos;
881 int version, pairwise;
882
883 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
884
885 if (force_version)
886 version = force_version;
887 else if (wpa_use_aes_cmac(sm))
888 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
889 else if (sm->pairwise == WPA_CIPHER_CCMP)
890 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
891 else
892 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
893
894 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
895
896 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
897 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
898 "encr=%d)",
899 version,
900 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
901 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
902 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
903 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
904 pairwise, (unsigned long) kde_len, keyidx, encr);
905
906 key_data_len = kde_len;
907
908 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
909 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
910 pad_len = key_data_len % 8;
911 if (pad_len)
912 pad_len = 8 - pad_len;
913 key_data_len += pad_len + 8;
914 }
915
916 len += key_data_len;
917
918 hdr = os_zalloc(len);
919 if (hdr == NULL)
920 return;
921 hdr->version = wpa_auth->conf.eapol_version;
922 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
923 hdr->length = host_to_be16(len - sizeof(*hdr));
924 key = (struct wpa_eapol_key *) (hdr + 1);
925
926 key->type = sm->wpa == WPA_VERSION_WPA2 ?
927 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
928 key_info |= version;
929 if (encr && sm->wpa == WPA_VERSION_WPA2)
930 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
931 if (sm->wpa != WPA_VERSION_WPA2)
932 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
933 WPA_PUT_BE16(key->key_info, key_info);
934
935 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
936 switch (alg) {
937 case WPA_CIPHER_CCMP:
938 WPA_PUT_BE16(key->key_length, 16);
939 break;
940 case WPA_CIPHER_TKIP:
941 WPA_PUT_BE16(key->key_length, 32);
942 break;
943 case WPA_CIPHER_WEP40:
944 WPA_PUT_BE16(key->key_length, 5);
945 break;
946 case WPA_CIPHER_WEP104:
947 WPA_PUT_BE16(key->key_length, 13);
948 break;
949 }
950 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
951 WPA_PUT_BE16(key->key_length, 0);
952
953 /* FIX: STSL: what to use as key_replay_counter? */
954 inc_byte_array(sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
955 os_memcpy(key->replay_counter, sm->key_replay_counter,
956 WPA_REPLAY_COUNTER_LEN);
957 sm->key_replay_counter_valid = TRUE;
958
959 if (nonce)
960 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
961
962 if (key_rsc)
963 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
964
965 if (kde && !encr) {
966 os_memcpy(key + 1, kde, kde_len);
967 WPA_PUT_BE16(key->key_data_length, kde_len);
968 } else if (encr && kde) {
969 buf = os_zalloc(key_data_len);
970 if (buf == NULL) {
971 os_free(hdr);
972 return;
973 }
974 pos = buf;
975 os_memcpy(pos, kde, kde_len);
976 pos += kde_len;
977
978 if (pad_len)
979 *pos++ = 0xdd;
980
981 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
982 buf, key_data_len);
983 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
984 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
985 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
986 (u8 *) (key + 1))) {
987 os_free(hdr);
988 os_free(buf);
989 return;
990 }
991 WPA_PUT_BE16(key->key_data_length, key_data_len);
992 } else {
993 u8 ek[32];
994 os_memcpy(key->key_iv,
995 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
996 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
997 os_memcpy(ek, key->key_iv, 16);
998 os_memcpy(ek + 16, sm->PTK.kek, 16);
999 os_memcpy(key + 1, buf, key_data_len);
1000 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1001 WPA_PUT_BE16(key->key_data_length, key_data_len);
1002 }
1003 os_free(buf);
1004 }
1005
1006 if (key_info & WPA_KEY_INFO_MIC) {
1007 if (!sm->PTK_valid) {
1008 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1009 "PTK not valid when sending EAPOL-Key "
1010 "frame");
1011 os_free(hdr);
1012 return;
1013 }
1014 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1015 key->key_mic);
1016 }
1017
1018 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1019 1);
1020 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1021 sm->pairwise_set);
1022 os_free(hdr);
1023 }
1024
1025
1026 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1027 struct wpa_state_machine *sm, int key_info,
1028 const u8 *key_rsc, const u8 *nonce,
1029 const u8 *kde, size_t kde_len,
1030 int keyidx, int encr)
1031 {
1032 int timeout_ms;
1033 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1034
1035 if (sm == NULL)
1036 return;
1037
1038 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1039 keyidx, encr, 0);
1040
1041 timeout_ms = pairwise ? dot11RSNAConfigPairwiseUpdateTimeOut :
1042 dot11RSNAConfigGroupUpdateTimeOut;
1043 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1044 wpa_send_eapol_timeout, wpa_auth, sm);
1045 }
1046
1047
1048 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1049 {
1050 struct ieee802_1x_hdr *hdr;
1051 struct wpa_eapol_key *key;
1052 u16 key_info;
1053 int ret = 0;
1054 u8 mic[16];
1055
1056 if (data_len < sizeof(*hdr) + sizeof(*key))
1057 return -1;
1058
1059 hdr = (struct ieee802_1x_hdr *) data;
1060 key = (struct wpa_eapol_key *) (hdr + 1);
1061 key_info = WPA_GET_BE16(key->key_info);
1062 os_memcpy(mic, key->key_mic, 16);
1063 os_memset(key->key_mic, 0, 16);
1064 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1065 data, data_len, key->key_mic) ||
1066 os_memcmp(mic, key->key_mic, 16) != 0)
1067 ret = -1;
1068 os_memcpy(key->key_mic, mic, 16);
1069 return ret;
1070 }
1071
1072
1073 void wpa_remove_ptk(struct wpa_state_machine *sm)
1074 {
1075 sm->PTK_valid = FALSE;
1076 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1077 wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1078 sm->pairwise_set = FALSE;
1079 }
1080
1081
1082 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1083 {
1084 if (sm == NULL)
1085 return;
1086
1087 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1088 "event %d notification", event);
1089
1090 switch (event) {
1091 case WPA_AUTH:
1092 case WPA_ASSOC:
1093 break;
1094 case WPA_DEAUTH:
1095 case WPA_DISASSOC:
1096 sm->DeauthenticationRequest = TRUE;
1097 break;
1098 case WPA_REAUTH:
1099 case WPA_REAUTH_EAPOL:
1100 sm->ReAuthenticationRequest = TRUE;
1101 break;
1102 case WPA_ASSOC_FT:
1103 #ifdef CONFIG_IEEE80211R
1104 /* Using FT protocol, not WPA auth state machine */
1105 sm->ft_completed = 1;
1106 return;
1107 #else /* CONFIG_IEEE80211R */
1108 break;
1109 #endif /* CONFIG_IEEE80211R */
1110 }
1111
1112 #ifdef CONFIG_IEEE80211R
1113 sm->ft_completed = 0;
1114 #endif /* CONFIG_IEEE80211R */
1115
1116 sm->PTK_valid = FALSE;
1117 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1118
1119 if (event != WPA_REAUTH_EAPOL)
1120 wpa_remove_ptk(sm);
1121
1122 wpa_sm_step(sm);
1123 }
1124
1125
1126 static const char * wpa_alg_txt(int alg)
1127 {
1128 switch (alg) {
1129 case WPA_CIPHER_CCMP:
1130 return "CCMP";
1131 case WPA_CIPHER_TKIP:
1132 return "TKIP";
1133 case WPA_CIPHER_WEP104:
1134 case WPA_CIPHER_WEP40:
1135 return "WEP";
1136 default:
1137 return "";
1138 }
1139 }
1140
1141
1142 SM_STATE(WPA_PTK, INITIALIZE)
1143 {
1144 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1145 if (sm->Init) {
1146 /* Init flag is not cleared here, so avoid busy
1147 * loop by claiming nothing changed. */
1148 sm->changed = FALSE;
1149 }
1150
1151 sm->keycount = 0;
1152 if (sm->GUpdateStationKeys)
1153 sm->group->GKeyDoneStations--;
1154 sm->GUpdateStationKeys = FALSE;
1155 if (sm->wpa == WPA_VERSION_WPA)
1156 sm->PInitAKeys = FALSE;
1157 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1158 * Local AA > Remote AA)) */) {
1159 sm->Pair = TRUE;
1160 }
1161 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1162 wpa_remove_ptk(sm);
1163 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1164 sm->TimeoutCtr = 0;
1165 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_PSK ||
1166 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK) {
1167 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1168 WPA_EAPOL_authorized, 0);
1169 }
1170 }
1171
1172
1173 SM_STATE(WPA_PTK, DISCONNECT)
1174 {
1175 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1176 sm->Disconnect = FALSE;
1177 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1178 }
1179
1180
1181 SM_STATE(WPA_PTK, DISCONNECTED)
1182 {
1183 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1184 sm->DeauthenticationRequest = FALSE;
1185 }
1186
1187
1188 SM_STATE(WPA_PTK, AUTHENTICATION)
1189 {
1190 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1191 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1192 sm->PTK_valid = FALSE;
1193 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1194 1);
1195 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1196 sm->AuthenticationRequest = FALSE;
1197 }
1198
1199
1200 SM_STATE(WPA_PTK, AUTHENTICATION2)
1201 {
1202 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1203 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1204 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1205 sm->ReAuthenticationRequest = FALSE;
1206 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1207 * logical place than INITIALIZE since AUTHENTICATION2 can be
1208 * re-entered on ReAuthenticationRequest without going through
1209 * INITIALIZE. */
1210 sm->TimeoutCtr = 0;
1211 }
1212
1213
1214 SM_STATE(WPA_PTK, INITPMK)
1215 {
1216 u8 msk[2 * PMK_LEN];
1217 size_t len = 2 * PMK_LEN;
1218
1219 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1220 #ifdef CONFIG_IEEE80211R
1221 sm->xxkey_len = 0;
1222 #endif /* CONFIG_IEEE80211R */
1223 if (sm->pmksa) {
1224 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1225 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1226 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1227 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1228 "(len=%lu)", (unsigned long) len);
1229 os_memcpy(sm->PMK, msk, PMK_LEN);
1230 #ifdef CONFIG_IEEE80211R
1231 if (len >= 2 * PMK_LEN) {
1232 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1233 sm->xxkey_len = PMK_LEN;
1234 }
1235 #endif /* CONFIG_IEEE80211R */
1236 } else {
1237 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1238 }
1239
1240 sm->req_replay_counter_used = 0;
1241 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1242 * will break reauthentication since EAPOL state machines may not be
1243 * get into AUTHENTICATING state that clears keyRun before WPA state
1244 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1245 * state and takes PMK from the previously used AAA Key. This will
1246 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1247 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1248 * be good workaround for this issue. */
1249 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1250 }
1251
1252
1253 SM_STATE(WPA_PTK, INITPSK)
1254 {
1255 const u8 *psk;
1256 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1257 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1258 if (psk) {
1259 os_memcpy(sm->PMK, psk, PMK_LEN);
1260 #ifdef CONFIG_IEEE80211R
1261 os_memcpy(sm->xxkey, psk, PMK_LEN);
1262 sm->xxkey_len = PMK_LEN;
1263 #endif /* CONFIG_IEEE80211R */
1264 }
1265 sm->req_replay_counter_used = 0;
1266 }
1267
1268
1269 SM_STATE(WPA_PTK, PTKSTART)
1270 {
1271 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1272 size_t pmkid_len = 0;
1273
1274 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1275 sm->PTKRequest = FALSE;
1276 sm->TimeoutEvt = FALSE;
1277 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1278 "sending 1/4 msg of 4-Way Handshake");
1279 /*
1280 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1281 * one possible PSK for this STA.
1282 */
1283 if (sm->wpa == WPA_VERSION_WPA2 &&
1284 sm->wpa_key_mgmt != WPA_KEY_MGMT_PSK) {
1285 pmkid = buf;
1286 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1287 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1288 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1289 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1290 if (sm->pmksa)
1291 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1292 sm->pmksa->pmkid, PMKID_LEN);
1293 else {
1294 /*
1295 * Calculate PMKID since no PMKSA cache entry was
1296 * available with pre-calculated PMKID.
1297 */
1298 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1299 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN]);
1300 }
1301 }
1302 wpa_send_eapol(sm->wpa_auth, sm,
1303 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1304 sm->ANonce, pmkid, pmkid_len, 0, 0);
1305 sm->TimeoutCtr++;
1306 }
1307
1308
1309 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1310 struct wpa_ptk *ptk)
1311 {
1312 #ifdef CONFIG_IEEE80211R
1313 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X ||
1314 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK)
1315 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1316 #endif /* CONFIG_IEEE80211R */
1317
1318 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1319 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1320 (u8 *) ptk, sizeof(*ptk));
1321
1322 return 0;
1323 }
1324
1325
1326 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1327 {
1328 struct wpa_ptk PTK;
1329 int ok = 0;
1330 const u8 *pmk = NULL;
1331
1332 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1333 sm->EAPOLKeyReceived = FALSE;
1334
1335 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1336 * WPA-PSK: iterate through possible PSKs and select the one matching
1337 * the packet */
1338 for (;;) {
1339 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_PSK ||
1340 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK) {
1341 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1342 if (pmk == NULL)
1343 break;
1344 } else
1345 pmk = sm->PMK;
1346
1347 wpa_derive_ptk(sm, pmk, &PTK);
1348
1349 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1350 sm->last_rx_eapol_key_len) == 0) {
1351 ok = 1;
1352 break;
1353 }
1354
1355 if (sm->wpa_key_mgmt != WPA_KEY_MGMT_PSK &&
1356 sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
1357 break;
1358 }
1359
1360 if (!ok) {
1361 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1362 "invalid MIC in msg 2/4 of 4-Way Handshake");
1363 return;
1364 }
1365
1366 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1367
1368 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_PSK ||
1369 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK) {
1370 /* PSK may have changed from the previous choice, so update
1371 * state machine data based on whatever PSK was selected here.
1372 */
1373 os_memcpy(sm->PMK, pmk, PMK_LEN);
1374 }
1375
1376 sm->MICVerified = TRUE;
1377
1378 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1379 sm->PTK_valid = TRUE;
1380 }
1381
1382
1383 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1384 {
1385 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1386 sm->TimeoutCtr = 0;
1387 }
1388
1389
1390 #ifdef CONFIG_IEEE80211W
1391
1392 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1393 {
1394 if (sm->mgmt_frame_prot) {
1395 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1396 }
1397
1398 return 0;
1399 }
1400
1401
1402 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1403 {
1404 struct wpa_igtk_kde igtk;
1405 struct wpa_group *gsm = sm->group;
1406
1407 if (!sm->mgmt_frame_prot)
1408 return pos;
1409
1410 igtk.keyid[0] = gsm->GN_igtk;
1411 igtk.keyid[1] = 0;
1412 if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1413 < 0)
1414 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1415 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1416 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1417 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1418
1419 return pos;
1420 }
1421
1422 #else /* CONFIG_IEEE80211W */
1423
1424 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1425 {
1426 return 0;
1427 }
1428
1429
1430 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1431 {
1432 return pos;
1433 }
1434
1435 #endif /* CONFIG_IEEE80211W */
1436
1437
1438 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1439 {
1440 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1441 size_t gtk_len, kde_len;
1442 struct wpa_group *gsm = sm->group;
1443 u8 *wpa_ie;
1444 int wpa_ie_len, secure, keyidx, encr = 0;
1445
1446 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1447 sm->TimeoutEvt = FALSE;
1448 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1449 */
1450 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1451 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1452 wpa_ie = sm->wpa_auth->wpa_ie;
1453 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1454 if (sm->wpa == WPA_VERSION_WPA &&
1455 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1456 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1457 /* WPA-only STA, remove RSN IE */
1458 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1459 wpa_ie_len = wpa_ie[1] + 2;
1460 }
1461 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1462 "sending 3/4 msg of 4-Way Handshake");
1463 if (sm->wpa == WPA_VERSION_WPA2) {
1464 /* WPA2 send GTK in the 4-way handshake */
1465 secure = 1;
1466 gtk = gsm->GTK[gsm->GN - 1];
1467 gtk_len = gsm->GTK_len;
1468 keyidx = gsm->GN;
1469 _rsc = rsc;
1470 encr = 1;
1471 } else {
1472 /* WPA does not include GTK in msg 3/4 */
1473 secure = 0;
1474 gtk = NULL;
1475 gtk_len = 0;
1476 keyidx = 0;
1477 _rsc = NULL;
1478 }
1479
1480 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1481 if (gtk)
1482 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1483 kde = os_malloc(kde_len);
1484 if (kde == NULL)
1485 return;
1486
1487 pos = kde;
1488 os_memcpy(pos, wpa_ie, wpa_ie_len);
1489 pos += wpa_ie_len;
1490 if (gtk) {
1491 u8 hdr[2];
1492 hdr[0] = keyidx & 0x03;
1493 hdr[1] = 0;
1494 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1495 gtk, gtk_len);
1496 }
1497 pos = ieee80211w_kde_add(sm, pos);
1498
1499 wpa_send_eapol(sm->wpa_auth, sm,
1500 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1501 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1502 WPA_KEY_INFO_KEY_TYPE,
1503 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1504 os_free(kde);
1505 sm->TimeoutCtr++;
1506 }
1507
1508
1509 SM_STATE(WPA_PTK, PTKINITDONE)
1510 {
1511 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1512 sm->EAPOLKeyReceived = FALSE;
1513 if (sm->Pair) {
1514 char *alg;
1515 int klen;
1516 if (sm->pairwise == WPA_CIPHER_TKIP) {
1517 alg = "TKIP";
1518 klen = 32;
1519 } else {
1520 alg = "CCMP";
1521 klen = 16;
1522 }
1523 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1524 sm->PTK.tk1, klen)) {
1525 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1526 return;
1527 }
1528 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1529 sm->pairwise_set = TRUE;
1530
1531 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_PSK ||
1532 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK) {
1533 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1534 WPA_EAPOL_authorized, 1);
1535 }
1536 }
1537
1538 if (0 /* IBSS == TRUE */) {
1539 sm->keycount++;
1540 if (sm->keycount == 2) {
1541 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1542 WPA_EAPOL_portValid, 1);
1543 }
1544 } else {
1545 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1546 1);
1547 }
1548 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1549 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1550 if (sm->wpa == WPA_VERSION_WPA)
1551 sm->PInitAKeys = TRUE;
1552 else
1553 sm->has_GTK = TRUE;
1554 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1555 "pairwise key handshake completed (%s)",
1556 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1557
1558 #ifdef CONFIG_IEEE80211R
1559 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1560 #endif /* CONFIG_IEEE80211R */
1561 }
1562
1563
1564 SM_STEP(WPA_PTK)
1565 {
1566 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1567
1568 if (sm->Init)
1569 SM_ENTER(WPA_PTK, INITIALIZE);
1570 else if (sm->Disconnect
1571 /* || FIX: dot11RSNAConfigSALifetime timeout */)
1572 SM_ENTER(WPA_PTK, DISCONNECT);
1573 else if (sm->DeauthenticationRequest)
1574 SM_ENTER(WPA_PTK, DISCONNECTED);
1575 else if (sm->AuthenticationRequest)
1576 SM_ENTER(WPA_PTK, AUTHENTICATION);
1577 else if (sm->ReAuthenticationRequest)
1578 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1579 else if (sm->PTKRequest)
1580 SM_ENTER(WPA_PTK, PTKSTART);
1581 else switch (sm->wpa_ptk_state) {
1582 case WPA_PTK_INITIALIZE:
1583 break;
1584 case WPA_PTK_DISCONNECT:
1585 SM_ENTER(WPA_PTK, DISCONNECTED);
1586 break;
1587 case WPA_PTK_DISCONNECTED:
1588 SM_ENTER(WPA_PTK, INITIALIZE);
1589 break;
1590 case WPA_PTK_AUTHENTICATION:
1591 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1592 break;
1593 case WPA_PTK_AUTHENTICATION2:
1594 if ((sm->wpa_key_mgmt == WPA_KEY_MGMT_IEEE8021X ||
1595 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) &&
1596 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1597 WPA_EAPOL_keyRun) > 0)
1598 SM_ENTER(WPA_PTK, INITPMK);
1599 else if ((sm->wpa_key_mgmt == WPA_KEY_MGMT_PSK ||
1600 sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_PSK)
1601 /* FIX: && 802.1X::keyRun */)
1602 SM_ENTER(WPA_PTK, INITPSK);
1603 break;
1604 case WPA_PTK_INITPMK:
1605 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1606 WPA_EAPOL_keyAvailable) > 0)
1607 SM_ENTER(WPA_PTK, PTKSTART);
1608 else {
1609 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1610 SM_ENTER(WPA_PTK, DISCONNECT);
1611 }
1612 break;
1613 case WPA_PTK_INITPSK:
1614 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1615 SM_ENTER(WPA_PTK, PTKSTART);
1616 else {
1617 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1618 "no PSK configured for the STA");
1619 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1620 SM_ENTER(WPA_PTK, DISCONNECT);
1621 }
1622 break;
1623 case WPA_PTK_PTKSTART:
1624 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1625 sm->EAPOLKeyPairwise)
1626 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1627 else if (sm->TimeoutCtr >
1628 (int) dot11RSNAConfigPairwiseUpdateCount) {
1629 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1630 SM_ENTER(WPA_PTK, DISCONNECT);
1631 } else if (sm->TimeoutEvt)
1632 SM_ENTER(WPA_PTK, PTKSTART);
1633 break;
1634 case WPA_PTK_PTKCALCNEGOTIATING:
1635 if (sm->MICVerified)
1636 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1637 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1638 sm->EAPOLKeyPairwise)
1639 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1640 else if (sm->TimeoutEvt)
1641 SM_ENTER(WPA_PTK, PTKSTART);
1642 break;
1643 case WPA_PTK_PTKCALCNEGOTIATING2:
1644 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1645 break;
1646 case WPA_PTK_PTKINITNEGOTIATING:
1647 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1648 sm->EAPOLKeyPairwise && sm->MICVerified)
1649 SM_ENTER(WPA_PTK, PTKINITDONE);
1650 else if (sm->TimeoutCtr >
1651 (int) dot11RSNAConfigPairwiseUpdateCount) {
1652 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1653 SM_ENTER(WPA_PTK, DISCONNECT);
1654 } else if (sm->TimeoutEvt)
1655 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1656 break;
1657 case WPA_PTK_PTKINITDONE:
1658 break;
1659 }
1660 }
1661
1662
1663 SM_STATE(WPA_PTK_GROUP, IDLE)
1664 {
1665 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1666 if (sm->Init) {
1667 /* Init flag is not cleared here, so avoid busy
1668 * loop by claiming nothing changed. */
1669 sm->changed = FALSE;
1670 }
1671 sm->GTimeoutCtr = 0;
1672 }
1673
1674
1675 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1676 {
1677 u8 rsc[WPA_KEY_RSC_LEN];
1678 struct wpa_group *gsm = sm->group;
1679 u8 *kde, *pos, hdr[2];
1680 size_t kde_len;
1681
1682 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1683 if (sm->wpa == WPA_VERSION_WPA)
1684 sm->PInitAKeys = FALSE;
1685 sm->TimeoutEvt = FALSE;
1686 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1687 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1688 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1689 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1690 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1691 "sending 1/2 msg of Group Key Handshake");
1692
1693 if (sm->wpa == WPA_VERSION_WPA2) {
1694 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1695 ieee80211w_kde_len(sm);
1696 kde = os_malloc(kde_len);
1697 if (kde == NULL)
1698 return;
1699
1700 pos = kde;
1701 hdr[0] = gsm->GN & 0x03;
1702 hdr[1] = 0;
1703 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1704 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1705 pos = ieee80211w_kde_add(sm, pos);
1706 } else {
1707 kde = gsm->GTK[gsm->GN - 1];
1708 pos = kde + gsm->GTK_len;
1709 }
1710
1711 wpa_send_eapol(sm->wpa_auth, sm,
1712 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1713 WPA_KEY_INFO_ACK |
1714 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1715 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1716 if (sm->wpa == WPA_VERSION_WPA2)
1717 os_free(kde);
1718 sm->GTimeoutCtr++;
1719 }
1720
1721
1722 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1723 {
1724 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1725 sm->EAPOLKeyReceived = FALSE;
1726 if (sm->GUpdateStationKeys)
1727 sm->group->GKeyDoneStations--;
1728 sm->GUpdateStationKeys = FALSE;
1729 sm->GTimeoutCtr = 0;
1730 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1731 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1732 "group key handshake completed (%s)",
1733 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1734 sm->has_GTK = TRUE;
1735 }
1736
1737
1738 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1739 {
1740 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1741 if (sm->GUpdateStationKeys)
1742 sm->group->GKeyDoneStations--;
1743 sm->GUpdateStationKeys = FALSE;
1744 sm->Disconnect = TRUE;
1745 }
1746
1747
1748 SM_STEP(WPA_PTK_GROUP)
1749 {
1750 if (sm->Init)
1751 SM_ENTER(WPA_PTK_GROUP, IDLE);
1752 else switch (sm->wpa_ptk_group_state) {
1753 case WPA_PTK_GROUP_IDLE:
1754 if (sm->GUpdateStationKeys ||
1755 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1756 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1757 break;
1758 case WPA_PTK_GROUP_REKEYNEGOTIATING:
1759 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1760 !sm->EAPOLKeyPairwise && sm->MICVerified)
1761 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1762 else if (sm->GTimeoutCtr >
1763 (int) dot11RSNAConfigGroupUpdateCount)
1764 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1765 else if (sm->TimeoutEvt)
1766 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1767 break;
1768 case WPA_PTK_GROUP_KEYERROR:
1769 SM_ENTER(WPA_PTK_GROUP, IDLE);
1770 break;
1771 case WPA_PTK_GROUP_REKEYESTABLISHED:
1772 SM_ENTER(WPA_PTK_GROUP, IDLE);
1773 break;
1774 }
1775 }
1776
1777
1778 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1779 struct wpa_group *group)
1780 {
1781 int ret = 0;
1782
1783 /* FIX: is this the correct way of getting GNonce? */
1784 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1785 inc_byte_array(group->Counter, WPA_NONCE_LEN);
1786 wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1787 group->GTK[group->GN - 1], group->GTK_len);
1788
1789 #ifdef CONFIG_IEEE80211W
1790 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1791 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1792 WPA_IGTK_LEN) < 0) {
1793 wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1794 "IGTK");
1795 ret = -1;
1796 }
1797 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1798 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1799 }
1800 #endif /* CONFIG_IEEE80211W */
1801
1802 return ret;
1803 }
1804
1805
1806 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1807 struct wpa_group *group)
1808 {
1809 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1810 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1811 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1812 group->wpa_group_state = WPA_GROUP_GTK_INIT;
1813
1814 /* GTK[0..N] = 0 */
1815 os_memset(group->GTK, 0, sizeof(group->GTK));
1816 group->GN = 1;
1817 group->GM = 2;
1818 #ifdef CONFIG_IEEE80211W
1819 group->GN_igtk = 4;
1820 group->GM_igtk = 5;
1821 #endif /* CONFIG_IEEE80211W */
1822 /* GTK[GN] = CalcGTK() */
1823 wpa_gtk_update(wpa_auth, group);
1824 }
1825
1826
1827 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1828 {
1829 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1830 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1831 "Not in PTKINITDONE; skip Group Key update");
1832 return 0;
1833 }
1834 sm->group->GKeyDoneStations++;
1835 sm->GUpdateStationKeys = TRUE;
1836 wpa_sm_step(sm);
1837 return 0;
1838 }
1839
1840
1841 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1842 struct wpa_group *group)
1843 {
1844 int tmp;
1845
1846 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1847 "SETKEYS (VLAN-ID %d)", group->vlan_id);
1848 group->changed = TRUE;
1849 group->wpa_group_state = WPA_GROUP_SETKEYS;
1850 group->GTKReKey = FALSE;
1851 tmp = group->GM;
1852 group->GM = group->GN;
1853 group->GN = tmp;
1854 #ifdef CONFIG_IEEE80211W
1855 tmp = group->GM_igtk;
1856 group->GM_igtk = group->GN_igtk;
1857 group->GN_igtk = tmp;
1858 #endif /* CONFIG_IEEE80211W */
1859 /* "GKeyDoneStations = GNoStations" is done in more robust way by
1860 * counting the STAs that are marked with GUpdateStationKeys instead of
1861 * including all STAs that could be in not-yet-completed state. */
1862 wpa_gtk_update(wpa_auth, group);
1863
1864 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1865 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1866 group->GKeyDoneStations);
1867 }
1868
1869
1870 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1871 struct wpa_group *group)
1872 {
1873 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1874 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1875 group->changed = TRUE;
1876 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1877 wpa_auth_set_key(wpa_auth, group->vlan_id,
1878 wpa_alg_txt(wpa_auth->conf.wpa_group),
1879 NULL, group->GN, group->GTK[group->GN - 1],
1880 group->GTK_len);
1881
1882 #ifdef CONFIG_IEEE80211W
1883 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1884 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
1885 NULL, group->GN_igtk,
1886 group->IGTK[group->GN_igtk - 4],
1887 WPA_IGTK_LEN);
1888 }
1889 #endif /* CONFIG_IEEE80211W */
1890 }
1891
1892
1893 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
1894 struct wpa_group *group)
1895 {
1896 if (group->GInit) {
1897 wpa_group_gtk_init(wpa_auth, group);
1898 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
1899 group->GTKAuthenticator) {
1900 wpa_group_setkeysdone(wpa_auth, group);
1901 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
1902 group->GTKReKey) {
1903 wpa_group_setkeys(wpa_auth, group);
1904 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
1905 if (group->GKeyDoneStations == 0)
1906 wpa_group_setkeysdone(wpa_auth, group);
1907 else if (group->GTKReKey)
1908 wpa_group_setkeys(wpa_auth, group);
1909 }
1910 }
1911
1912
1913 static void wpa_sm_step(struct wpa_state_machine *sm)
1914 {
1915 if (sm == NULL)
1916 return;
1917
1918 if (sm->in_step_loop) {
1919 /* This should not happen, but if it does, make sure we do not
1920 * end up freeing the state machine too early by exiting the
1921 * recursive call. */
1922 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
1923 return;
1924 }
1925
1926 sm->in_step_loop = 1;
1927 do {
1928 if (sm->pending_deinit)
1929 break;
1930
1931 sm->changed = FALSE;
1932 sm->wpa_auth->group->changed = FALSE;
1933
1934 SM_STEP_RUN(WPA_PTK);
1935 if (sm->pending_deinit)
1936 break;
1937 SM_STEP_RUN(WPA_PTK_GROUP);
1938 if (sm->pending_deinit)
1939 break;
1940 wpa_group_sm_step(sm->wpa_auth, sm->group);
1941 } while (sm->changed || sm->wpa_auth->group->changed);
1942 sm->in_step_loop = 0;
1943
1944 if (sm->pending_deinit) {
1945 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
1946 "machine deinit for " MACSTR, MAC2STR(sm->addr));
1947 wpa_free_sta_sm(sm);
1948 }
1949 }
1950
1951
1952 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
1953 {
1954 struct wpa_state_machine *sm = eloop_ctx;
1955 wpa_sm_step(sm);
1956 }
1957
1958
1959 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
1960 {
1961 if (sm == NULL)
1962 return;
1963 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
1964 }
1965
1966
1967 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
1968 {
1969 int tmp, i;
1970 struct wpa_group *group;
1971
1972 if (wpa_auth == NULL)
1973 return;
1974
1975 group = wpa_auth->group;
1976
1977 for (i = 0; i < 2; i++) {
1978 tmp = group->GM;
1979 group->GM = group->GN;
1980 group->GN = tmp;
1981 #ifdef CONFIG_IEEE80211W
1982 tmp = group->GM_igtk;
1983 group->GM_igtk = group->GN_igtk;
1984 group->GN_igtk = tmp;
1985 #endif /* CONFIG_IEEE80211W */
1986 wpa_gtk_update(wpa_auth, group);
1987 }
1988 }
1989
1990
1991 static const char * wpa_bool_txt(int bool)
1992 {
1993 return bool ? "TRUE" : "FALSE";
1994 }
1995
1996
1997 static int wpa_cipher_bits(int cipher)
1998 {
1999 switch (cipher) {
2000 case WPA_CIPHER_CCMP:
2001 return 128;
2002 case WPA_CIPHER_TKIP:
2003 return 256;
2004 case WPA_CIPHER_WEP104:
2005 return 104;
2006 case WPA_CIPHER_WEP40:
2007 return 40;
2008 default:
2009 return 0;
2010 }
2011 }
2012
2013
2014 #define RSN_SUITE "%02x-%02x-%02x-%d"
2015 #define RSN_SUITE_ARG(s) \
2016 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2017
2018 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2019 {
2020 int len = 0, ret;
2021 char pmkid_txt[PMKID_LEN * 2 + 1];
2022
2023 if (wpa_auth == NULL)
2024 return len;
2025
2026 ret = os_snprintf(buf + len, buflen - len,
2027 "dot11RSNAOptionImplemented=TRUE\n"
2028 #ifdef CONFIG_RSN_PREAUTH
2029 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2030 #else /* CONFIG_RSN_PREAUTH */
2031 "dot11RSNAPreauthenticationImplemented=FALSE\n"
2032 #endif /* CONFIG_RSN_PREAUTH */
2033 "dot11RSNAEnabled=%s\n"
2034 "dot11RSNAPreauthenticationEnabled=%s\n",
2035 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2036 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2037 if (ret < 0 || (size_t) ret >= buflen - len)
2038 return len;
2039 len += ret;
2040
2041 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2042 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2043
2044 ret = os_snprintf(
2045 buf + len, buflen - len,
2046 "dot11RSNAConfigVersion=%u\n"
2047 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2048 /* FIX: dot11RSNAConfigGroupCipher */
2049 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2050 /* FIX: dot11RSNAConfigGroupRekeyTime */
2051 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2052 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2053 "dot11RSNAConfigGroupUpdateCount=%u\n"
2054 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2055 "dot11RSNAConfigGroupCipherSize=%u\n"
2056 "dot11RSNAConfigPMKLifetime=%u\n"
2057 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2058 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2059 "dot11RSNAConfigSATimeout=%u\n"
2060 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2061 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2062 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2063 "dot11RSNAPMKIDUsed=%s\n"
2064 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2065 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2066 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2067 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2068 "dot11RSNA4WayHandshakeFailures=%u\n"
2069 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2070 RSN_VERSION,
2071 !!wpa_auth->conf.wpa_strict_rekey,
2072 dot11RSNAConfigGroupUpdateCount,
2073 dot11RSNAConfigPairwiseUpdateCount,
2074 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2075 dot11RSNAConfigPMKLifetime,
2076 dot11RSNAConfigPMKReauthThreshold,
2077 dot11RSNAConfigSATimeout,
2078 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2079 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2080 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2081 pmkid_txt,
2082 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2083 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2084 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2085 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2086 wpa_auth->dot11RSNA4WayHandshakeFailures);
2087 if (ret < 0 || (size_t) ret >= buflen - len)
2088 return len;
2089 len += ret;
2090
2091 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2092 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2093
2094 /* Private MIB */
2095 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2096 wpa_auth->group->wpa_group_state);
2097 if (ret < 0 || (size_t) ret >= buflen - len)
2098 return len;
2099 len += ret;
2100
2101 return len;
2102 }
2103
2104
2105 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2106 {
2107 int len = 0, ret;
2108 u32 pairwise = 0;
2109
2110 if (sm == NULL)
2111 return 0;
2112
2113 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2114
2115 /* dot11RSNAStatsEntry */
2116
2117 if (sm->wpa == WPA_VERSION_WPA) {
2118 if (sm->pairwise == WPA_CIPHER_CCMP)
2119 pairwise = WPA_CIPHER_SUITE_CCMP;
2120 else if (sm->pairwise == WPA_CIPHER_TKIP)
2121 pairwise = WPA_CIPHER_SUITE_TKIP;
2122 else if (sm->pairwise == WPA_CIPHER_WEP104)
2123 pairwise = WPA_CIPHER_SUITE_WEP104;
2124 else if (sm->pairwise == WPA_CIPHER_WEP40)
2125 pairwise = WPA_CIPHER_SUITE_WEP40;
2126 else if (sm->pairwise == WPA_CIPHER_NONE)
2127 pairwise = WPA_CIPHER_SUITE_NONE;
2128 } else if (sm->wpa == WPA_VERSION_WPA2) {
2129 if (sm->pairwise == WPA_CIPHER_CCMP)
2130 pairwise = RSN_CIPHER_SUITE_CCMP;
2131 else if (sm->pairwise == WPA_CIPHER_TKIP)
2132 pairwise = RSN_CIPHER_SUITE_TKIP;
2133 else if (sm->pairwise == WPA_CIPHER_WEP104)
2134 pairwise = RSN_CIPHER_SUITE_WEP104;
2135 else if (sm->pairwise == WPA_CIPHER_WEP40)
2136 pairwise = RSN_CIPHER_SUITE_WEP40;
2137 else if (sm->pairwise == WPA_CIPHER_NONE)
2138 pairwise = RSN_CIPHER_SUITE_NONE;
2139 } else
2140 return 0;
2141
2142 ret = os_snprintf(
2143 buf + len, buflen - len,
2144 /* TODO: dot11RSNAStatsIndex */
2145 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2146 "dot11RSNAStatsVersion=1\n"
2147 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2148 /* TODO: dot11RSNAStatsTKIPICVErrors */
2149 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2150 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2151 /* TODO: dot11RSNAStatsCCMPReplays */
2152 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2153 /* TODO: dot11RSNAStatsTKIPReplays */,
2154 MAC2STR(sm->addr),
2155 RSN_SUITE_ARG(pairwise),
2156 sm->dot11RSNAStatsTKIPLocalMICFailures,
2157 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2158 if (ret < 0 || (size_t) ret >= buflen - len)
2159 return len;
2160 len += ret;
2161
2162 /* Private MIB */
2163 ret = os_snprintf(buf + len, buflen - len,
2164 "hostapdWPAPTKState=%d\n"
2165 "hostapdWPAPTKGroupState=%d\n",
2166 sm->wpa_ptk_state,
2167 sm->wpa_ptk_group_state);
2168 if (ret < 0 || (size_t) ret >= buflen - len)
2169 return len;
2170 len += ret;
2171
2172 return len;
2173 }
2174
2175
2176 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2177 {
2178 if (wpa_auth)
2179 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2180 }
2181
2182
2183 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2184 {
2185 return sm && sm->pairwise_set;
2186 }
2187
2188
2189 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2190 {
2191 if (sm == NULL)
2192 return -1;
2193 return sm->wpa_key_mgmt;
2194 }
2195
2196
2197 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2198 {
2199 if (sm == NULL)
2200 return 0;
2201 return sm->wpa;
2202 }
2203
2204
2205 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2206 struct rsn_pmksa_cache_entry *entry)
2207 {
2208 if (sm == NULL || sm->pmksa != entry)
2209 return -1;
2210 sm->pmksa = NULL;
2211 return 0;
2212 }
2213
2214
2215 struct rsn_pmksa_cache_entry *
2216 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2217 {
2218 return sm ? sm->pmksa : NULL;
2219 }
2220
2221
2222 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2223 {
2224 if (sm)
2225 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2226 }
2227
2228
2229 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2230 {
2231 if (wpa_auth == NULL)
2232 return NULL;
2233 *len = wpa_auth->wpa_ie_len;
2234 return wpa_auth->wpa_ie;
2235 }
2236
2237
2238 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2239 int session_timeout, struct eapol_state_machine *eapol)
2240 {
2241 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2242 return -1;
2243
2244 if (pmksa_cache_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2245 sm->wpa_auth->addr, sm->addr, session_timeout,
2246 eapol))
2247 return 0;
2248
2249 return -1;
2250 }
2251
2252
2253 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2254 const u8 *pmk, size_t len, const u8 *sta_addr,
2255 int session_timeout,
2256 struct eapol_state_machine *eapol)
2257 {
2258 if (wpa_auth == NULL)
2259 return -1;
2260
2261 if (pmksa_cache_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2262 sta_addr, session_timeout, eapol))
2263 return 0;
2264
2265 return -1;
2266 }
2267
2268
2269 static struct wpa_group *
2270 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2271 {
2272 struct wpa_group *group;
2273
2274 if (wpa_auth == NULL || wpa_auth->group == NULL)
2275 return NULL;
2276
2277 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2278 vlan_id);
2279 group = wpa_group_init(wpa_auth, vlan_id);
2280 if (group == NULL)
2281 return NULL;
2282
2283 group->next = wpa_auth->group->next;
2284 wpa_auth->group->next = group;
2285
2286 return group;
2287 }
2288
2289
2290 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2291 {
2292 struct wpa_group *group;
2293
2294 if (sm == NULL || sm->wpa_auth == NULL)
2295 return 0;
2296
2297 group = sm->wpa_auth->group;
2298 while (group) {
2299 if (group->vlan_id == vlan_id)
2300 break;
2301 group = group->next;
2302 }
2303
2304 if (group == NULL) {
2305 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2306 if (group == NULL)
2307 return -1;
2308 }
2309
2310 if (sm->group == group)
2311 return 0;
2312
2313 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2314 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2315
2316 sm->group = group;
2317 return 0;
2318 }
2319
2320 #endif /* CONFIG_NATIVE_WINDOWS */
NetBSD on the FriendlyARM MINI2440