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WPA auth: Clear temporary MSK storage from stack explicitly
[thirdparty/hostap.git] / src / ap / wpa_auth.c
1 /*
2 * IEEE 802.11 RSN / WPA Authenticator
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "utils/state_machine.h"
14 #include "utils/bitfield.h"
15 #include "common/ieee802_11_defs.h"
16 #include "crypto/aes_wrap.h"
17 #include "crypto/crypto.h"
18 #include "crypto/sha1.h"
19 #include "crypto/sha256.h"
20 #include "crypto/random.h"
21 #include "eapol_auth/eapol_auth_sm.h"
22 #include "ap_config.h"
23 #include "ieee802_11.h"
24 #include "wpa_auth.h"
25 #include "pmksa_cache_auth.h"
26 #include "wpa_auth_i.h"
27 #include "wpa_auth_ie.h"
28
29 #define STATE_MACHINE_DATA struct wpa_state_machine
30 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
31 #define STATE_MACHINE_ADDR sm->addr
32
33
34 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
35 static int wpa_sm_step(struct wpa_state_machine *sm);
36 static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
37 size_t data_len);
38 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
39 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
40 struct wpa_group *group);
41 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
42 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
43 struct wpa_group *group);
44 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
45 struct wpa_group *group);
46 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
47 const u8 *pmk, struct wpa_ptk *ptk);
48
49 static const u32 dot11RSNAConfigGroupUpdateCount = 4;
50 static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
51 static const u32 eapol_key_timeout_first = 100; /* ms */
52 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
53 static const u32 eapol_key_timeout_first_group = 500; /* ms */
54
55 /* TODO: make these configurable */
56 static const int dot11RSNAConfigPMKLifetime = 43200;
57 static const int dot11RSNAConfigPMKReauthThreshold = 70;
58 static const int dot11RSNAConfigSATimeout = 60;
59
60
61 static inline int wpa_auth_mic_failure_report(
62 struct wpa_authenticator *wpa_auth, const u8 *addr)
63 {
64 if (wpa_auth->cb.mic_failure_report)
65 return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
66 return 0;
67 }
68
69
70 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
71 const u8 *addr, wpa_eapol_variable var,
72 int value)
73 {
74 if (wpa_auth->cb.set_eapol)
75 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
76 }
77
78
79 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
80 const u8 *addr, wpa_eapol_variable var)
81 {
82 if (wpa_auth->cb.get_eapol == NULL)
83 return -1;
84 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
85 }
86
87
88 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
89 const u8 *addr,
90 const u8 *p2p_dev_addr,
91 const u8 *prev_psk)
92 {
93 if (wpa_auth->cb.get_psk == NULL)
94 return NULL;
95 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
96 prev_psk);
97 }
98
99
100 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
101 const u8 *addr, u8 *msk, size_t *len)
102 {
103 if (wpa_auth->cb.get_msk == NULL)
104 return -1;
105 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
106 }
107
108
109 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
110 int vlan_id,
111 enum wpa_alg alg, const u8 *addr, int idx,
112 u8 *key, size_t key_len)
113 {
114 if (wpa_auth->cb.set_key == NULL)
115 return -1;
116 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
117 key, key_len);
118 }
119
120
121 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
122 const u8 *addr, int idx, u8 *seq)
123 {
124 if (wpa_auth->cb.get_seqnum == NULL)
125 return -1;
126 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
127 }
128
129
130 static inline int
131 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
132 const u8 *data, size_t data_len, int encrypt)
133 {
134 if (wpa_auth->cb.send_eapol == NULL)
135 return -1;
136 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
137 encrypt);
138 }
139
140
141 #ifdef CONFIG_MESH
142 static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
143 const u8 *addr)
144 {
145 if (wpa_auth->cb.start_ampe == NULL)
146 return -1;
147 return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr);
148 }
149 #endif /* CONFIG_MESH */
150
151
152 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
153 int (*cb)(struct wpa_state_machine *sm, void *ctx),
154 void *cb_ctx)
155 {
156 if (wpa_auth->cb.for_each_sta == NULL)
157 return 0;
158 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
159 }
160
161
162 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
163 int (*cb)(struct wpa_authenticator *a, void *ctx),
164 void *cb_ctx)
165 {
166 if (wpa_auth->cb.for_each_auth == NULL)
167 return 0;
168 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
169 }
170
171
172 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
173 logger_level level, const char *txt)
174 {
175 if (wpa_auth->cb.logger == NULL)
176 return;
177 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
178 }
179
180
181 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
182 logger_level level, const char *fmt, ...)
183 {
184 char *format;
185 int maxlen;
186 va_list ap;
187
188 if (wpa_auth->cb.logger == NULL)
189 return;
190
191 maxlen = os_strlen(fmt) + 100;
192 format = os_malloc(maxlen);
193 if (!format)
194 return;
195
196 va_start(ap, fmt);
197 vsnprintf(format, maxlen, fmt, ap);
198 va_end(ap);
199
200 wpa_auth_logger(wpa_auth, addr, level, format);
201
202 os_free(format);
203 }
204
205
206 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
207 const u8 *addr)
208 {
209 if (wpa_auth->cb.disconnect == NULL)
210 return;
211 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
212 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
213 WLAN_REASON_PREV_AUTH_NOT_VALID);
214 }
215
216
217 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
218 {
219 int ret = 0;
220 #ifdef CONFIG_IEEE80211R
221 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
222 ret = 1;
223 #endif /* CONFIG_IEEE80211R */
224 #ifdef CONFIG_IEEE80211W
225 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
226 ret = 1;
227 #endif /* CONFIG_IEEE80211W */
228 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
229 ret = 1;
230 return ret;
231 }
232
233
234 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
235 {
236 struct wpa_authenticator *wpa_auth = eloop_ctx;
237
238 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
239 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
240 "initialization.");
241 } else {
242 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
243 wpa_hexdump_key(MSG_DEBUG, "GMK",
244 wpa_auth->group->GMK, WPA_GMK_LEN);
245 }
246
247 if (wpa_auth->conf.wpa_gmk_rekey) {
248 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
249 wpa_rekey_gmk, wpa_auth, NULL);
250 }
251 }
252
253
254 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
255 {
256 struct wpa_authenticator *wpa_auth = eloop_ctx;
257 struct wpa_group *group;
258
259 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
260 for (group = wpa_auth->group; group; group = group->next) {
261 group->GTKReKey = TRUE;
262 do {
263 group->changed = FALSE;
264 wpa_group_sm_step(wpa_auth, group);
265 } while (group->changed);
266 }
267
268 if (wpa_auth->conf.wpa_group_rekey) {
269 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
270 0, wpa_rekey_gtk, wpa_auth, NULL);
271 }
272 }
273
274
275 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
276 {
277 struct wpa_authenticator *wpa_auth = eloop_ctx;
278 struct wpa_state_machine *sm = timeout_ctx;
279
280 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
281 wpa_request_new_ptk(sm);
282 wpa_sm_step(sm);
283 }
284
285
286 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
287 {
288 if (sm->pmksa == ctx)
289 sm->pmksa = NULL;
290 return 0;
291 }
292
293
294 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
295 void *ctx)
296 {
297 struct wpa_authenticator *wpa_auth = ctx;
298 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
299 }
300
301
302 static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
303 struct wpa_group *group)
304 {
305 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
306 u8 rkey[32];
307 unsigned long ptr;
308
309 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
310 return -1;
311 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
312
313 /*
314 * Counter = PRF-256(Random number, "Init Counter",
315 * Local MAC Address || Time)
316 */
317 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
318 wpa_get_ntp_timestamp(buf + ETH_ALEN);
319 ptr = (unsigned long) group;
320 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
321 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
322 return -1;
323
324 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
325 group->Counter, WPA_NONCE_LEN) < 0)
326 return -1;
327 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
328 group->Counter, WPA_NONCE_LEN);
329
330 return 0;
331 }
332
333
334 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
335 int vlan_id, int delay_init)
336 {
337 struct wpa_group *group;
338
339 group = os_zalloc(sizeof(struct wpa_group));
340 if (group == NULL)
341 return NULL;
342
343 group->GTKAuthenticator = TRUE;
344 group->vlan_id = vlan_id;
345 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
346
347 if (random_pool_ready() != 1) {
348 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
349 "for secure operations - update keys later when "
350 "the first station connects");
351 }
352
353 /*
354 * Set initial GMK/Counter value here. The actual values that will be
355 * used in negotiations will be set once the first station tries to
356 * connect. This allows more time for collecting additional randomness
357 * on embedded devices.
358 */
359 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
360 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
361 "initialization.");
362 os_free(group);
363 return NULL;
364 }
365
366 group->GInit = TRUE;
367 if (delay_init) {
368 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
369 "until Beacon frames have been configured");
370 /* Initialization is completed in wpa_init_keys(). */
371 } else {
372 wpa_group_sm_step(wpa_auth, group);
373 group->GInit = FALSE;
374 wpa_group_sm_step(wpa_auth, group);
375 }
376
377 return group;
378 }
379
380
381 /**
382 * wpa_init - Initialize WPA authenticator
383 * @addr: Authenticator address
384 * @conf: Configuration for WPA authenticator
385 * @cb: Callback functions for WPA authenticator
386 * Returns: Pointer to WPA authenticator data or %NULL on failure
387 */
388 struct wpa_authenticator * wpa_init(const u8 *addr,
389 struct wpa_auth_config *conf,
390 struct wpa_auth_callbacks *cb)
391 {
392 struct wpa_authenticator *wpa_auth;
393
394 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
395 if (wpa_auth == NULL)
396 return NULL;
397 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
398 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
399 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
400
401 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
402 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
403 os_free(wpa_auth);
404 return NULL;
405 }
406
407 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
408 if (wpa_auth->group == NULL) {
409 os_free(wpa_auth->wpa_ie);
410 os_free(wpa_auth);
411 return NULL;
412 }
413
414 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
415 wpa_auth);
416 if (wpa_auth->pmksa == NULL) {
417 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
418 os_free(wpa_auth->group);
419 os_free(wpa_auth->wpa_ie);
420 os_free(wpa_auth);
421 return NULL;
422 }
423
424 #ifdef CONFIG_IEEE80211R
425 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
426 if (wpa_auth->ft_pmk_cache == NULL) {
427 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
428 os_free(wpa_auth->group);
429 os_free(wpa_auth->wpa_ie);
430 pmksa_cache_auth_deinit(wpa_auth->pmksa);
431 os_free(wpa_auth);
432 return NULL;
433 }
434 #endif /* CONFIG_IEEE80211R */
435
436 if (wpa_auth->conf.wpa_gmk_rekey) {
437 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
438 wpa_rekey_gmk, wpa_auth, NULL);
439 }
440
441 if (wpa_auth->conf.wpa_group_rekey) {
442 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
443 wpa_rekey_gtk, wpa_auth, NULL);
444 }
445
446 #ifdef CONFIG_P2P
447 if (WPA_GET_BE32(conf->ip_addr_start)) {
448 int count = WPA_GET_BE32(conf->ip_addr_end) -
449 WPA_GET_BE32(conf->ip_addr_start) + 1;
450 if (count > 1000)
451 count = 1000;
452 if (count > 0)
453 wpa_auth->ip_pool = bitfield_alloc(count);
454 }
455 #endif /* CONFIG_P2P */
456
457 return wpa_auth;
458 }
459
460
461 int wpa_init_keys(struct wpa_authenticator *wpa_auth)
462 {
463 struct wpa_group *group = wpa_auth->group;
464
465 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
466 "keys");
467 wpa_group_sm_step(wpa_auth, group);
468 group->GInit = FALSE;
469 wpa_group_sm_step(wpa_auth, group);
470 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
471 return -1;
472 return 0;
473 }
474
475
476 /**
477 * wpa_deinit - Deinitialize WPA authenticator
478 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
479 */
480 void wpa_deinit(struct wpa_authenticator *wpa_auth)
481 {
482 struct wpa_group *group, *prev;
483
484 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
485 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
486
487 #ifdef CONFIG_PEERKEY
488 while (wpa_auth->stsl_negotiations)
489 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
490 #endif /* CONFIG_PEERKEY */
491
492 pmksa_cache_auth_deinit(wpa_auth->pmksa);
493
494 #ifdef CONFIG_IEEE80211R
495 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
496 wpa_auth->ft_pmk_cache = NULL;
497 #endif /* CONFIG_IEEE80211R */
498
499 #ifdef CONFIG_P2P
500 bitfield_free(wpa_auth->ip_pool);
501 #endif /* CONFIG_P2P */
502
503
504 os_free(wpa_auth->wpa_ie);
505
506 group = wpa_auth->group;
507 while (group) {
508 prev = group;
509 group = group->next;
510 os_free(prev);
511 }
512
513 os_free(wpa_auth);
514 }
515
516
517 /**
518 * wpa_reconfig - Update WPA authenticator configuration
519 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
520 * @conf: Configuration for WPA authenticator
521 */
522 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
523 struct wpa_auth_config *conf)
524 {
525 struct wpa_group *group;
526 if (wpa_auth == NULL)
527 return 0;
528
529 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
530 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
531 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
532 return -1;
533 }
534
535 /*
536 * Reinitialize GTK to make sure it is suitable for the new
537 * configuration.
538 */
539 group = wpa_auth->group;
540 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
541 group->GInit = TRUE;
542 wpa_group_sm_step(wpa_auth, group);
543 group->GInit = FALSE;
544 wpa_group_sm_step(wpa_auth, group);
545
546 return 0;
547 }
548
549
550 struct wpa_state_machine *
551 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
552 const u8 *p2p_dev_addr)
553 {
554 struct wpa_state_machine *sm;
555
556 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
557 return NULL;
558
559 sm = os_zalloc(sizeof(struct wpa_state_machine));
560 if (sm == NULL)
561 return NULL;
562 os_memcpy(sm->addr, addr, ETH_ALEN);
563 if (p2p_dev_addr)
564 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
565
566 sm->wpa_auth = wpa_auth;
567 sm->group = wpa_auth->group;
568
569 return sm;
570 }
571
572
573 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
574 struct wpa_state_machine *sm)
575 {
576 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
577 return -1;
578
579 #ifdef CONFIG_IEEE80211R
580 if (sm->ft_completed) {
581 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
582 "FT authentication already completed - do not "
583 "start 4-way handshake");
584 /* Go to PTKINITDONE state to allow GTK rekeying */
585 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
586 return 0;
587 }
588 #endif /* CONFIG_IEEE80211R */
589
590 if (sm->started) {
591 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
592 sm->ReAuthenticationRequest = TRUE;
593 return wpa_sm_step(sm);
594 }
595
596 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
597 "start authentication");
598 sm->started = 1;
599
600 sm->Init = TRUE;
601 if (wpa_sm_step(sm) == 1)
602 return 1; /* should not really happen */
603 sm->Init = FALSE;
604 sm->AuthenticationRequest = TRUE;
605 return wpa_sm_step(sm);
606 }
607
608
609 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
610 {
611 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
612 * reassociates back to the same AP while the previous entry for the
613 * STA has not yet been removed. */
614 if (sm == NULL)
615 return;
616
617 sm->wpa_key_mgmt = 0;
618 }
619
620
621 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
622 {
623 #ifdef CONFIG_P2P
624 if (WPA_GET_BE32(sm->ip_addr)) {
625 u32 start;
626 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
627 "address %u.%u.%u.%u from " MACSTR,
628 sm->ip_addr[0], sm->ip_addr[1],
629 sm->ip_addr[2], sm->ip_addr[3],
630 MAC2STR(sm->addr));
631 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
632 bitfield_clear(sm->wpa_auth->ip_pool,
633 WPA_GET_BE32(sm->ip_addr) - start);
634 }
635 #endif /* CONFIG_P2P */
636 if (sm->GUpdateStationKeys) {
637 sm->group->GKeyDoneStations--;
638 sm->GUpdateStationKeys = FALSE;
639 }
640 #ifdef CONFIG_IEEE80211R
641 os_free(sm->assoc_resp_ftie);
642 wpabuf_free(sm->ft_pending_req_ies);
643 #endif /* CONFIG_IEEE80211R */
644 os_free(sm->last_rx_eapol_key);
645 os_free(sm->wpa_ie);
646 os_free(sm);
647 }
648
649
650 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
651 {
652 if (sm == NULL)
653 return;
654
655 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
656 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
657 "strict rekeying - force GTK rekey since STA "
658 "is leaving");
659 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
660 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
661 NULL);
662 }
663
664 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
665 sm->pending_1_of_4_timeout = 0;
666 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
667 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
668 if (sm->in_step_loop) {
669 /* Must not free state machine while wpa_sm_step() is running.
670 * Freeing will be completed in the end of wpa_sm_step(). */
671 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
672 "machine deinit for " MACSTR, MAC2STR(sm->addr));
673 sm->pending_deinit = 1;
674 } else
675 wpa_free_sta_sm(sm);
676 }
677
678
679 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
680 {
681 if (sm == NULL)
682 return;
683
684 sm->PTKRequest = TRUE;
685 sm->PTK_valid = 0;
686 }
687
688
689 static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
690 const u8 *replay_counter)
691 {
692 int i;
693 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
694 if (!ctr[i].valid)
695 break;
696 if (os_memcmp(replay_counter, ctr[i].counter,
697 WPA_REPLAY_COUNTER_LEN) == 0)
698 return 1;
699 }
700 return 0;
701 }
702
703
704 static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
705 const u8 *replay_counter)
706 {
707 int i;
708 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
709 if (ctr[i].valid &&
710 (replay_counter == NULL ||
711 os_memcmp(replay_counter, ctr[i].counter,
712 WPA_REPLAY_COUNTER_LEN) == 0))
713 ctr[i].valid = FALSE;
714 }
715 }
716
717
718 #ifdef CONFIG_IEEE80211R
719 static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
720 struct wpa_state_machine *sm,
721 struct wpa_eapol_ie_parse *kde)
722 {
723 struct wpa_ie_data ie;
724 struct rsn_mdie *mdie;
725
726 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
727 ie.num_pmkid != 1 || ie.pmkid == NULL) {
728 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
729 "FT 4-way handshake message 2/4");
730 return -1;
731 }
732
733 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
734 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
735 sm->sup_pmk_r1_name, PMKID_LEN);
736
737 if (!kde->mdie || !kde->ftie) {
738 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
739 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
740 return -1;
741 }
742
743 mdie = (struct rsn_mdie *) (kde->mdie + 2);
744 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
745 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
746 MOBILITY_DOMAIN_ID_LEN) != 0) {
747 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
748 return -1;
749 }
750
751 if (sm->assoc_resp_ftie &&
752 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
753 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
754 2 + sm->assoc_resp_ftie[1]) != 0)) {
755 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
756 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
757 kde->ftie, kde->ftie_len);
758 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
759 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
760 return -1;
761 }
762
763 return 0;
764 }
765 #endif /* CONFIG_IEEE80211R */
766
767
768 static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
769 struct wpa_state_machine *sm, int group)
770 {
771 /* Supplicant reported a Michael MIC error */
772 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
773 "received EAPOL-Key Error Request "
774 "(STA detected Michael MIC failure (group=%d))",
775 group);
776
777 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
778 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
779 "ignore Michael MIC failure report since "
780 "group cipher is not TKIP");
781 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
782 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
783 "ignore Michael MIC failure report since "
784 "pairwise cipher is not TKIP");
785 } else {
786 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
787 return 1; /* STA entry was removed */
788 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
789 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
790 }
791
792 /*
793 * Error report is not a request for a new key handshake, but since
794 * Authenticator may do it, let's change the keys now anyway.
795 */
796 wpa_request_new_ptk(sm);
797 return 0;
798 }
799
800
801 static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
802 size_t data_len)
803 {
804 struct wpa_ptk PTK;
805 int ok = 0;
806 const u8 *pmk = NULL;
807
808 for (;;) {
809 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
810 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
811 sm->p2p_dev_addr, pmk);
812 if (pmk == NULL)
813 break;
814 } else
815 pmk = sm->PMK;
816
817 wpa_derive_ptk(sm, sm->alt_SNonce, pmk, &PTK);
818
819 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len)
820 == 0) {
821 ok = 1;
822 break;
823 }
824
825 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
826 break;
827 }
828
829 if (!ok) {
830 wpa_printf(MSG_DEBUG,
831 "WPA: Earlier SNonce did not result in matching MIC");
832 return -1;
833 }
834
835 wpa_printf(MSG_DEBUG,
836 "WPA: Earlier SNonce resulted in matching MIC");
837 sm->alt_snonce_valid = 0;
838 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
839 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
840 sm->PTK_valid = TRUE;
841
842 return 0;
843 }
844
845
846 void wpa_receive(struct wpa_authenticator *wpa_auth,
847 struct wpa_state_machine *sm,
848 u8 *data, size_t data_len)
849 {
850 struct ieee802_1x_hdr *hdr;
851 struct wpa_eapol_key *key;
852 struct wpa_eapol_key_192 *key192;
853 u16 key_info, key_data_length;
854 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
855 SMK_M1, SMK_M3, SMK_ERROR } msg;
856 char *msgtxt;
857 struct wpa_eapol_ie_parse kde;
858 int ft;
859 const u8 *eapol_key_ie, *key_data;
860 size_t eapol_key_ie_len, keyhdrlen, mic_len;
861
862 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
863 return;
864
865 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
866 keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
867
868 if (data_len < sizeof(*hdr) + keyhdrlen)
869 return;
870
871 hdr = (struct ieee802_1x_hdr *) data;
872 key = (struct wpa_eapol_key *) (hdr + 1);
873 key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
874 key_info = WPA_GET_BE16(key->key_info);
875 if (mic_len == 24) {
876 key_data = (const u8 *) (key192 + 1);
877 key_data_length = WPA_GET_BE16(key192->key_data_length);
878 } else {
879 key_data = (const u8 *) (key + 1);
880 key_data_length = WPA_GET_BE16(key->key_data_length);
881 }
882 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
883 " key_info=0x%x type=%u key_data_length=%u",
884 MAC2STR(sm->addr), key_info, key->type, key_data_length);
885 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
886 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
887 "key_data overflow (%d > %lu)",
888 key_data_length,
889 (unsigned long) (data_len - sizeof(*hdr) -
890 keyhdrlen));
891 return;
892 }
893
894 if (sm->wpa == WPA_VERSION_WPA2) {
895 if (key->type == EAPOL_KEY_TYPE_WPA) {
896 /*
897 * Some deployed station implementations seem to send
898 * msg 4/4 with incorrect type value in WPA2 mode.
899 */
900 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
901 "with unexpected WPA type in RSN mode");
902 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
903 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
904 "unexpected type %d in RSN mode",
905 key->type);
906 return;
907 }
908 } else {
909 if (key->type != EAPOL_KEY_TYPE_WPA) {
910 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
911 "unexpected type %d in WPA mode",
912 key->type);
913 return;
914 }
915 }
916
917 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
918 WPA_NONCE_LEN);
919 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
920 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
921
922 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
923 * are set */
924
925 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
926 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
927 if (key_info & WPA_KEY_INFO_ERROR) {
928 msg = SMK_ERROR;
929 msgtxt = "SMK Error";
930 } else {
931 msg = SMK_M1;
932 msgtxt = "SMK M1";
933 }
934 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
935 msg = SMK_M3;
936 msgtxt = "SMK M3";
937 } else if (key_info & WPA_KEY_INFO_REQUEST) {
938 msg = REQUEST;
939 msgtxt = "Request";
940 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
941 msg = GROUP_2;
942 msgtxt = "2/2 Group";
943 } else if (key_data_length == 0) {
944 msg = PAIRWISE_4;
945 msgtxt = "4/4 Pairwise";
946 } else {
947 msg = PAIRWISE_2;
948 msgtxt = "2/4 Pairwise";
949 }
950
951 /* TODO: key_info type validation for PeerKey */
952 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
953 msg == GROUP_2) {
954 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
955 if (sm->pairwise == WPA_CIPHER_CCMP ||
956 sm->pairwise == WPA_CIPHER_GCMP) {
957 if (wpa_use_aes_cmac(sm) &&
958 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
959 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
960 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
961 wpa_auth_logger(wpa_auth, sm->addr,
962 LOGGER_WARNING,
963 "advertised support for "
964 "AES-128-CMAC, but did not "
965 "use it");
966 return;
967 }
968
969 if (!wpa_use_aes_cmac(sm) &&
970 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
971 wpa_auth_logger(wpa_auth, sm->addr,
972 LOGGER_WARNING,
973 "did not use HMAC-SHA1-AES "
974 "with CCMP/GCMP");
975 return;
976 }
977 }
978
979 if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
980 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
981 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
982 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
983 return;
984 }
985 }
986
987 if (key_info & WPA_KEY_INFO_REQUEST) {
988 if (sm->req_replay_counter_used &&
989 os_memcmp(key->replay_counter, sm->req_replay_counter,
990 WPA_REPLAY_COUNTER_LEN) <= 0) {
991 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
992 "received EAPOL-Key request with "
993 "replayed counter");
994 return;
995 }
996 }
997
998 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
999 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
1000 int i;
1001
1002 if (msg == PAIRWISE_2 &&
1003 wpa_replay_counter_valid(sm->prev_key_replay,
1004 key->replay_counter) &&
1005 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1006 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1007 {
1008 /*
1009 * Some supplicant implementations (e.g., Windows XP
1010 * WZC) update SNonce for each EAPOL-Key 2/4. This
1011 * breaks the workaround on accepting any of the
1012 * pending requests, so allow the SNonce to be updated
1013 * even if we have already sent out EAPOL-Key 3/4.
1014 */
1015 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1016 "Process SNonce update from STA "
1017 "based on retransmitted EAPOL-Key "
1018 "1/4");
1019 sm->update_snonce = 1;
1020 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1021 sm->alt_snonce_valid = TRUE;
1022 os_memcpy(sm->alt_replay_counter,
1023 sm->key_replay[0].counter,
1024 WPA_REPLAY_COUNTER_LEN);
1025 goto continue_processing;
1026 }
1027
1028 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1029 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1030 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1031 WPA_REPLAY_COUNTER_LEN) == 0) {
1032 /*
1033 * Supplicant may still be using the old SNonce since
1034 * there was two EAPOL-Key 2/4 messages and they had
1035 * different SNonce values.
1036 */
1037 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1038 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
1039 goto continue_processing;
1040 }
1041
1042 if (msg == PAIRWISE_2 &&
1043 wpa_replay_counter_valid(sm->prev_key_replay,
1044 key->replay_counter) &&
1045 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1046 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1047 "ignore retransmitted EAPOL-Key %s - "
1048 "SNonce did not change", msgtxt);
1049 } else {
1050 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1051 "received EAPOL-Key %s with "
1052 "unexpected replay counter", msgtxt);
1053 }
1054 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1055 if (!sm->key_replay[i].valid)
1056 break;
1057 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1058 sm->key_replay[i].counter,
1059 WPA_REPLAY_COUNTER_LEN);
1060 }
1061 wpa_hexdump(MSG_DEBUG, "received replay counter",
1062 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1063 return;
1064 }
1065
1066 continue_processing:
1067 switch (msg) {
1068 case PAIRWISE_2:
1069 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
1070 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1071 (!sm->update_snonce ||
1072 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
1073 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1074 "received EAPOL-Key msg 2/4 in "
1075 "invalid state (%d) - dropped",
1076 sm->wpa_ptk_state);
1077 return;
1078 }
1079 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
1080 if (sm->group->reject_4way_hs_for_entropy) {
1081 /*
1082 * The system did not have enough entropy to generate
1083 * strong random numbers. Reject the first 4-way
1084 * handshake(s) and collect some entropy based on the
1085 * information from it. Once enough entropy is
1086 * available, the next atempt will trigger GMK/Key
1087 * Counter update and the station will be allowed to
1088 * continue.
1089 */
1090 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1091 "collect more entropy for random number "
1092 "generation");
1093 random_mark_pool_ready();
1094 wpa_sta_disconnect(wpa_auth, sm->addr);
1095 return;
1096 }
1097 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
1098 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1099 "received EAPOL-Key msg 2/4 with "
1100 "invalid Key Data contents");
1101 return;
1102 }
1103 if (kde.rsn_ie) {
1104 eapol_key_ie = kde.rsn_ie;
1105 eapol_key_ie_len = kde.rsn_ie_len;
1106 } else if (kde.osen) {
1107 eapol_key_ie = kde.osen;
1108 eapol_key_ie_len = kde.osen_len;
1109 } else {
1110 eapol_key_ie = kde.wpa_ie;
1111 eapol_key_ie_len = kde.wpa_ie_len;
1112 }
1113 ft = sm->wpa == WPA_VERSION_WPA2 &&
1114 wpa_key_mgmt_ft(sm->wpa_key_mgmt);
1115 if (sm->wpa_ie == NULL ||
1116 wpa_compare_rsn_ie(ft,
1117 sm->wpa_ie, sm->wpa_ie_len,
1118 eapol_key_ie, eapol_key_ie_len)) {
1119 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1120 "WPA IE from (Re)AssocReq did not "
1121 "match with msg 2/4");
1122 if (sm->wpa_ie) {
1123 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
1124 sm->wpa_ie, sm->wpa_ie_len);
1125 }
1126 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1127 eapol_key_ie, eapol_key_ie_len);
1128 /* MLME-DEAUTHENTICATE.request */
1129 wpa_sta_disconnect(wpa_auth, sm->addr);
1130 return;
1131 }
1132 #ifdef CONFIG_IEEE80211R
1133 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
1134 wpa_sta_disconnect(wpa_auth, sm->addr);
1135 return;
1136 }
1137 #endif /* CONFIG_IEEE80211R */
1138 #ifdef CONFIG_P2P
1139 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
1140 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
1141 int idx;
1142 wpa_printf(MSG_DEBUG, "P2P: IP address requested in "
1143 "EAPOL-Key exchange");
1144 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
1145 if (idx >= 0) {
1146 u32 start = WPA_GET_BE32(wpa_auth->conf.
1147 ip_addr_start);
1148 bitfield_set(wpa_auth->ip_pool, idx);
1149 WPA_PUT_BE32(sm->ip_addr, start + idx);
1150 wpa_printf(MSG_DEBUG, "P2P: Assigned IP "
1151 "address %u.%u.%u.%u to " MACSTR,
1152 sm->ip_addr[0], sm->ip_addr[1],
1153 sm->ip_addr[2], sm->ip_addr[3],
1154 MAC2STR(sm->addr));
1155 }
1156 }
1157 #endif /* CONFIG_P2P */
1158 break;
1159 case PAIRWISE_4:
1160 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1161 !sm->PTK_valid) {
1162 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1163 "received EAPOL-Key msg 4/4 in "
1164 "invalid state (%d) - dropped",
1165 sm->wpa_ptk_state);
1166 return;
1167 }
1168 break;
1169 case GROUP_2:
1170 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1171 || !sm->PTK_valid) {
1172 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1173 "received EAPOL-Key msg 2/2 in "
1174 "invalid state (%d) - dropped",
1175 sm->wpa_ptk_group_state);
1176 return;
1177 }
1178 break;
1179 #ifdef CONFIG_PEERKEY
1180 case SMK_M1:
1181 case SMK_M3:
1182 case SMK_ERROR:
1183 if (!wpa_auth->conf.peerkey) {
1184 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1185 "PeerKey use disabled - ignoring message");
1186 return;
1187 }
1188 if (!sm->PTK_valid) {
1189 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1190 "received EAPOL-Key msg SMK in "
1191 "invalid state - dropped");
1192 return;
1193 }
1194 break;
1195 #else /* CONFIG_PEERKEY */
1196 case SMK_M1:
1197 case SMK_M3:
1198 case SMK_ERROR:
1199 return; /* STSL disabled - ignore SMK messages */
1200 #endif /* CONFIG_PEERKEY */
1201 case REQUEST:
1202 break;
1203 }
1204
1205 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1206 "received EAPOL-Key frame (%s)", msgtxt);
1207
1208 if (key_info & WPA_KEY_INFO_ACK) {
1209 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1210 "received invalid EAPOL-Key: Key Ack set");
1211 return;
1212 }
1213
1214 if (!(key_info & WPA_KEY_INFO_MIC)) {
1215 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1216 "received invalid EAPOL-Key: Key MIC not set");
1217 return;
1218 }
1219
1220 sm->MICVerified = FALSE;
1221 if (sm->PTK_valid && !sm->update_snonce) {
1222 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data,
1223 data_len) &&
1224 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1225 wpa_try_alt_snonce(sm, data, data_len))) {
1226 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1227 "received EAPOL-Key with invalid MIC");
1228 return;
1229 }
1230 sm->MICVerified = TRUE;
1231 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
1232 sm->pending_1_of_4_timeout = 0;
1233 }
1234
1235 if (key_info & WPA_KEY_INFO_REQUEST) {
1236 if (sm->MICVerified) {
1237 sm->req_replay_counter_used = 1;
1238 os_memcpy(sm->req_replay_counter, key->replay_counter,
1239 WPA_REPLAY_COUNTER_LEN);
1240 } else {
1241 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1242 "received EAPOL-Key request with "
1243 "invalid MIC");
1244 return;
1245 }
1246
1247 /*
1248 * TODO: should decrypt key data field if encryption was used;
1249 * even though MAC address KDE is not normally encrypted,
1250 * supplicant is allowed to encrypt it.
1251 */
1252 if (msg == SMK_ERROR) {
1253 #ifdef CONFIG_PEERKEY
1254 wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
1255 #endif /* CONFIG_PEERKEY */
1256 return;
1257 } else if (key_info & WPA_KEY_INFO_ERROR) {
1258 if (wpa_receive_error_report(
1259 wpa_auth, sm,
1260 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1261 return; /* STA entry was removed */
1262 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1263 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1264 "received EAPOL-Key Request for new "
1265 "4-Way Handshake");
1266 wpa_request_new_ptk(sm);
1267 #ifdef CONFIG_PEERKEY
1268 } else if (msg == SMK_M1) {
1269 wpa_smk_m1(wpa_auth, sm, key, key_data,
1270 key_data_length);
1271 #endif /* CONFIG_PEERKEY */
1272 } else if (key_data_length > 0 &&
1273 wpa_parse_kde_ies(key_data, key_data_length,
1274 &kde) == 0 &&
1275 kde.mac_addr) {
1276 } else {
1277 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1278 "received EAPOL-Key Request for GTK "
1279 "rekeying");
1280 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1281 wpa_rekey_gtk(wpa_auth, NULL);
1282 }
1283 } else {
1284 /* Do not allow the same key replay counter to be reused. */
1285 wpa_replay_counter_mark_invalid(sm->key_replay,
1286 key->replay_counter);
1287
1288 if (msg == PAIRWISE_2) {
1289 /*
1290 * Maintain a copy of the pending EAPOL-Key frames in
1291 * case the EAPOL-Key frame was retransmitted. This is
1292 * needed to allow EAPOL-Key msg 2/4 reply to another
1293 * pending msg 1/4 to update the SNonce to work around
1294 * unexpected supplicant behavior.
1295 */
1296 os_memcpy(sm->prev_key_replay, sm->key_replay,
1297 sizeof(sm->key_replay));
1298 } else {
1299 os_memset(sm->prev_key_replay, 0,
1300 sizeof(sm->prev_key_replay));
1301 }
1302
1303 /*
1304 * Make sure old valid counters are not accepted anymore and
1305 * do not get copied again.
1306 */
1307 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
1308 }
1309
1310 #ifdef CONFIG_PEERKEY
1311 if (msg == SMK_M3) {
1312 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
1313 return;
1314 }
1315 #endif /* CONFIG_PEERKEY */
1316
1317 os_free(sm->last_rx_eapol_key);
1318 sm->last_rx_eapol_key = os_malloc(data_len);
1319 if (sm->last_rx_eapol_key == NULL)
1320 return;
1321 os_memcpy(sm->last_rx_eapol_key, data, data_len);
1322 sm->last_rx_eapol_key_len = data_len;
1323
1324 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
1325 sm->EAPOLKeyReceived = TRUE;
1326 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1327 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1328 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1329 wpa_sm_step(sm);
1330 }
1331
1332
1333 static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1334 const u8 *gnonce, u8 *gtk, size_t gtk_len)
1335 {
1336 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1337 u8 *pos;
1338 int ret = 0;
1339
1340 /* GTK = PRF-X(GMK, "Group key expansion",
1341 * AA || GNonce || Time || random data)
1342 * The example described in the IEEE 802.11 standard uses only AA and
1343 * GNonce as inputs here. Add some more entropy since this derivation
1344 * is done only at the Authenticator and as such, does not need to be
1345 * exactly same.
1346 */
1347 os_memcpy(data, addr, ETH_ALEN);
1348 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1349 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1350 wpa_get_ntp_timestamp(pos);
1351 pos += 8;
1352 if (random_get_bytes(pos, 16) < 0)
1353 ret = -1;
1354
1355 #ifdef CONFIG_IEEE80211W
1356 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
1357 #else /* CONFIG_IEEE80211W */
1358 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1359 < 0)
1360 ret = -1;
1361 #endif /* CONFIG_IEEE80211W */
1362
1363 return ret;
1364 }
1365
1366
1367 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1368 {
1369 struct wpa_authenticator *wpa_auth = eloop_ctx;
1370 struct wpa_state_machine *sm = timeout_ctx;
1371
1372 sm->pending_1_of_4_timeout = 0;
1373 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1374 sm->TimeoutEvt = TRUE;
1375 wpa_sm_step(sm);
1376 }
1377
1378
1379 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1380 struct wpa_state_machine *sm, int key_info,
1381 const u8 *key_rsc, const u8 *nonce,
1382 const u8 *kde, size_t kde_len,
1383 int keyidx, int encr, int force_version)
1384 {
1385 struct ieee802_1x_hdr *hdr;
1386 struct wpa_eapol_key *key;
1387 struct wpa_eapol_key_192 *key192;
1388 size_t len, mic_len, keyhdrlen;
1389 int alg;
1390 int key_data_len, pad_len = 0;
1391 u8 *buf, *pos;
1392 int version, pairwise;
1393 int i;
1394 u8 *key_data;
1395
1396 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
1397 keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
1398
1399 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
1400
1401 if (force_version)
1402 version = force_version;
1403 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1404 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt))
1405 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
1406 else if (wpa_use_aes_cmac(sm))
1407 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1408 else if (sm->pairwise != WPA_CIPHER_TKIP)
1409 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1410 else
1411 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1412
1413 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1414
1415 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1416 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1417 "encr=%d)",
1418 version,
1419 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1420 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1421 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1422 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1423 pairwise, (unsigned long) kde_len, keyidx, encr);
1424
1425 key_data_len = kde_len;
1426
1427 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1428 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1429 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1430 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1431 pad_len = key_data_len % 8;
1432 if (pad_len)
1433 pad_len = 8 - pad_len;
1434 key_data_len += pad_len + 8;
1435 }
1436
1437 len += key_data_len;
1438
1439 hdr = os_zalloc(len);
1440 if (hdr == NULL)
1441 return;
1442 hdr->version = wpa_auth->conf.eapol_version;
1443 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1444 hdr->length = host_to_be16(len - sizeof(*hdr));
1445 key = (struct wpa_eapol_key *) (hdr + 1);
1446 key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
1447 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
1448
1449 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1450 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1451 key_info |= version;
1452 if (encr && sm->wpa == WPA_VERSION_WPA2)
1453 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1454 if (sm->wpa != WPA_VERSION_WPA2)
1455 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1456 WPA_PUT_BE16(key->key_info, key_info);
1457
1458 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1459 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
1460 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1461 WPA_PUT_BE16(key->key_length, 0);
1462
1463 /* FIX: STSL: what to use as key_replay_counter? */
1464 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1465 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1466 os_memcpy(sm->key_replay[i].counter,
1467 sm->key_replay[i - 1].counter,
1468 WPA_REPLAY_COUNTER_LEN);
1469 }
1470 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1471 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1472 WPA_REPLAY_COUNTER_LEN);
1473 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1474 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1475 sm->key_replay[0].valid = TRUE;
1476
1477 if (nonce)
1478 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1479
1480 if (key_rsc)
1481 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1482
1483 if (kde && !encr) {
1484 os_memcpy(key_data, kde, kde_len);
1485 if (mic_len == 24)
1486 WPA_PUT_BE16(key192->key_data_length, kde_len);
1487 else
1488 WPA_PUT_BE16(key->key_data_length, kde_len);
1489 } else if (encr && kde) {
1490 buf = os_zalloc(key_data_len);
1491 if (buf == NULL) {
1492 os_free(hdr);
1493 return;
1494 }
1495 pos = buf;
1496 os_memcpy(pos, kde, kde_len);
1497 pos += kde_len;
1498
1499 if (pad_len)
1500 *pos++ = 0xdd;
1501
1502 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1503 buf, key_data_len);
1504 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1505 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1506 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1507 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1508 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
1509 (key_data_len - 8) / 8, buf, key_data)) {
1510 os_free(hdr);
1511 os_free(buf);
1512 return;
1513 }
1514 if (mic_len == 24)
1515 WPA_PUT_BE16(key192->key_data_length,
1516 key_data_len);
1517 else
1518 WPA_PUT_BE16(key->key_data_length,
1519 key_data_len);
1520 } else if (sm->PTK.kek_len == 16) {
1521 u8 ek[32];
1522 os_memcpy(key->key_iv,
1523 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1524 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1525 os_memcpy(ek, key->key_iv, 16);
1526 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
1527 os_memcpy(key_data, buf, key_data_len);
1528 rc4_skip(ek, 32, 256, key_data, key_data_len);
1529 if (mic_len == 24)
1530 WPA_PUT_BE16(key192->key_data_length,
1531 key_data_len);
1532 else
1533 WPA_PUT_BE16(key->key_data_length,
1534 key_data_len);
1535 } else {
1536 os_free(hdr);
1537 os_free(buf);
1538 return;
1539 }
1540 os_free(buf);
1541 }
1542
1543 if (key_info & WPA_KEY_INFO_MIC) {
1544 u8 *key_mic;
1545
1546 if (!sm->PTK_valid) {
1547 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1548 "PTK not valid when sending EAPOL-Key "
1549 "frame");
1550 os_free(hdr);
1551 return;
1552 }
1553
1554 key_mic = key192->key_mic; /* same offset for key and key192 */
1555 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1556 sm->wpa_key_mgmt, version,
1557 (u8 *) hdr, len, key_mic);
1558 #ifdef CONFIG_TESTING_OPTIONS
1559 if (!pairwise &&
1560 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
1561 drand48() <
1562 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1563 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1564 "Corrupting group EAPOL-Key Key MIC");
1565 key_mic[0]++;
1566 }
1567 #endif /* CONFIG_TESTING_OPTIONS */
1568 }
1569
1570 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1571 1);
1572 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1573 sm->pairwise_set);
1574 os_free(hdr);
1575 }
1576
1577
1578 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1579 struct wpa_state_machine *sm, int key_info,
1580 const u8 *key_rsc, const u8 *nonce,
1581 const u8 *kde, size_t kde_len,
1582 int keyidx, int encr)
1583 {
1584 int timeout_ms;
1585 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1586 int ctr;
1587
1588 if (sm == NULL)
1589 return;
1590
1591 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1592 keyidx, encr, 0);
1593
1594 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1595 if (ctr == 1 && wpa_auth->conf.tx_status)
1596 timeout_ms = pairwise ? eapol_key_timeout_first :
1597 eapol_key_timeout_first_group;
1598 else
1599 timeout_ms = eapol_key_timeout_subseq;
1600 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1601 sm->pending_1_of_4_timeout = 1;
1602 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1603 "counter %d)", timeout_ms, ctr);
1604 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1605 wpa_send_eapol_timeout, wpa_auth, sm);
1606 }
1607
1608
1609 static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
1610 size_t data_len)
1611 {
1612 struct ieee802_1x_hdr *hdr;
1613 struct wpa_eapol_key *key;
1614 struct wpa_eapol_key_192 *key192;
1615 u16 key_info;
1616 int ret = 0;
1617 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
1618 size_t mic_len = wpa_mic_len(akmp);
1619
1620 if (data_len < sizeof(*hdr) + sizeof(*key))
1621 return -1;
1622
1623 hdr = (struct ieee802_1x_hdr *) data;
1624 key = (struct wpa_eapol_key *) (hdr + 1);
1625 key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
1626 key_info = WPA_GET_BE16(key->key_info);
1627 os_memcpy(mic, key192->key_mic, mic_len);
1628 os_memset(key192->key_mic, 0, mic_len);
1629 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1630 key_info & WPA_KEY_INFO_TYPE_MASK,
1631 data, data_len, key192->key_mic) ||
1632 os_memcmp_const(mic, key192->key_mic, mic_len) != 0)
1633 ret = -1;
1634 os_memcpy(key192->key_mic, mic, mic_len);
1635 return ret;
1636 }
1637
1638
1639 void wpa_remove_ptk(struct wpa_state_machine *sm)
1640 {
1641 sm->PTK_valid = FALSE;
1642 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1643 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
1644 sm->pairwise_set = FALSE;
1645 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1646 }
1647
1648
1649 int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1650 {
1651 int remove_ptk = 1;
1652
1653 if (sm == NULL)
1654 return -1;
1655
1656 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1657 "event %d notification", event);
1658
1659 switch (event) {
1660 case WPA_AUTH:
1661 #ifdef CONFIG_MESH
1662 /* PTKs are derived through AMPE */
1663 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1664 /* not mesh */
1665 break;
1666 }
1667 return 0;
1668 #endif /* CONFIG_MESH */
1669 case WPA_ASSOC:
1670 break;
1671 case WPA_DEAUTH:
1672 case WPA_DISASSOC:
1673 sm->DeauthenticationRequest = TRUE;
1674 break;
1675 case WPA_REAUTH:
1676 case WPA_REAUTH_EAPOL:
1677 if (!sm->started) {
1678 /*
1679 * When using WPS, we may end up here if the STA
1680 * manages to re-associate without the previous STA
1681 * entry getting removed. Consequently, we need to make
1682 * sure that the WPA state machines gets initialized
1683 * properly at this point.
1684 */
1685 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1686 "started - initialize now");
1687 sm->started = 1;
1688 sm->Init = TRUE;
1689 if (wpa_sm_step(sm) == 1)
1690 return 1; /* should not really happen */
1691 sm->Init = FALSE;
1692 sm->AuthenticationRequest = TRUE;
1693 break;
1694 }
1695 if (sm->GUpdateStationKeys) {
1696 /*
1697 * Reauthentication cancels the pending group key
1698 * update for this STA.
1699 */
1700 sm->group->GKeyDoneStations--;
1701 sm->GUpdateStationKeys = FALSE;
1702 sm->PtkGroupInit = TRUE;
1703 }
1704 sm->ReAuthenticationRequest = TRUE;
1705 break;
1706 case WPA_ASSOC_FT:
1707 #ifdef CONFIG_IEEE80211R
1708 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1709 "after association");
1710 wpa_ft_install_ptk(sm);
1711
1712 /* Using FT protocol, not WPA auth state machine */
1713 sm->ft_completed = 1;
1714 return 0;
1715 #else /* CONFIG_IEEE80211R */
1716 break;
1717 #endif /* CONFIG_IEEE80211R */
1718 }
1719
1720 #ifdef CONFIG_IEEE80211R
1721 sm->ft_completed = 0;
1722 #endif /* CONFIG_IEEE80211R */
1723
1724 #ifdef CONFIG_IEEE80211W
1725 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1726 remove_ptk = 0;
1727 #endif /* CONFIG_IEEE80211W */
1728
1729 if (remove_ptk) {
1730 sm->PTK_valid = FALSE;
1731 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1732
1733 if (event != WPA_REAUTH_EAPOL)
1734 wpa_remove_ptk(sm);
1735 }
1736
1737 return wpa_sm_step(sm);
1738 }
1739
1740
1741 SM_STATE(WPA_PTK, INITIALIZE)
1742 {
1743 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1744 if (sm->Init) {
1745 /* Init flag is not cleared here, so avoid busy
1746 * loop by claiming nothing changed. */
1747 sm->changed = FALSE;
1748 }
1749
1750 sm->keycount = 0;
1751 if (sm->GUpdateStationKeys)
1752 sm->group->GKeyDoneStations--;
1753 sm->GUpdateStationKeys = FALSE;
1754 if (sm->wpa == WPA_VERSION_WPA)
1755 sm->PInitAKeys = FALSE;
1756 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1757 * Local AA > Remote AA)) */) {
1758 sm->Pair = TRUE;
1759 }
1760 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1761 wpa_remove_ptk(sm);
1762 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1763 sm->TimeoutCtr = 0;
1764 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1765 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1766 WPA_EAPOL_authorized, 0);
1767 }
1768 }
1769
1770
1771 SM_STATE(WPA_PTK, DISCONNECT)
1772 {
1773 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1774 sm->Disconnect = FALSE;
1775 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1776 }
1777
1778
1779 SM_STATE(WPA_PTK, DISCONNECTED)
1780 {
1781 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1782 sm->DeauthenticationRequest = FALSE;
1783 }
1784
1785
1786 SM_STATE(WPA_PTK, AUTHENTICATION)
1787 {
1788 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1789 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1790 sm->PTK_valid = FALSE;
1791 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1792 1);
1793 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1794 sm->AuthenticationRequest = FALSE;
1795 }
1796
1797
1798 static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1799 struct wpa_group *group)
1800 {
1801 if (group->first_sta_seen)
1802 return;
1803 /*
1804 * System has run bit further than at the time hostapd was started
1805 * potentially very early during boot up. This provides better chances
1806 * of collecting more randomness on embedded systems. Re-initialize the
1807 * GMK and Counter here to improve their strength if there was not
1808 * enough entropy available immediately after system startup.
1809 */
1810 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1811 "station");
1812 if (random_pool_ready() != 1) {
1813 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1814 "to proceed - reject first 4-way handshake");
1815 group->reject_4way_hs_for_entropy = TRUE;
1816 } else {
1817 group->first_sta_seen = TRUE;
1818 group->reject_4way_hs_for_entropy = FALSE;
1819 }
1820
1821 wpa_group_init_gmk_and_counter(wpa_auth, group);
1822 wpa_gtk_update(wpa_auth, group);
1823 wpa_group_config_group_keys(wpa_auth, group);
1824 }
1825
1826
1827 SM_STATE(WPA_PTK, AUTHENTICATION2)
1828 {
1829 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1830
1831 wpa_group_ensure_init(sm->wpa_auth, sm->group);
1832 sm->ReAuthenticationRequest = FALSE;
1833
1834 /*
1835 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1836 * ambiguous. The Authenticator state machine uses a counter that is
1837 * incremented by one for each 4-way handshake. However, the security
1838 * analysis of 4-way handshake points out that unpredictable nonces
1839 * help in preventing precomputation attacks. Instead of the state
1840 * machine definition, use an unpredictable nonce value here to provide
1841 * stronger protection against potential precomputation attacks.
1842 */
1843 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1844 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1845 "ANonce.");
1846 sm->Disconnect = TRUE;
1847 return;
1848 }
1849 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1850 WPA_NONCE_LEN);
1851 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1852 * logical place than INITIALIZE since AUTHENTICATION2 can be
1853 * re-entered on ReAuthenticationRequest without going through
1854 * INITIALIZE. */
1855 sm->TimeoutCtr = 0;
1856 }
1857
1858
1859 SM_STATE(WPA_PTK, INITPMK)
1860 {
1861 u8 msk[2 * PMK_LEN];
1862 size_t len = 2 * PMK_LEN;
1863
1864 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1865 #ifdef CONFIG_IEEE80211R
1866 sm->xxkey_len = 0;
1867 #endif /* CONFIG_IEEE80211R */
1868 if (sm->pmksa) {
1869 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1870 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1871 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1872 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1873 "(len=%lu)", (unsigned long) len);
1874 os_memcpy(sm->PMK, msk, PMK_LEN);
1875 #ifdef CONFIG_IEEE80211R
1876 if (len >= 2 * PMK_LEN) {
1877 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1878 sm->xxkey_len = PMK_LEN;
1879 }
1880 #endif /* CONFIG_IEEE80211R */
1881 } else {
1882 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
1883 sm->wpa_auth->cb.get_msk);
1884 }
1885 os_memset(msk, 0, sizeof(msk));
1886
1887 sm->req_replay_counter_used = 0;
1888 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1889 * will break reauthentication since EAPOL state machines may not be
1890 * get into AUTHENTICATING state that clears keyRun before WPA state
1891 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1892 * state and takes PMK from the previously used AAA Key. This will
1893 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1894 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1895 * be good workaround for this issue. */
1896 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1897 }
1898
1899
1900 SM_STATE(WPA_PTK, INITPSK)
1901 {
1902 const u8 *psk;
1903 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1904 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
1905 if (psk) {
1906 os_memcpy(sm->PMK, psk, PMK_LEN);
1907 #ifdef CONFIG_IEEE80211R
1908 os_memcpy(sm->xxkey, psk, PMK_LEN);
1909 sm->xxkey_len = PMK_LEN;
1910 #endif /* CONFIG_IEEE80211R */
1911 }
1912 sm->req_replay_counter_used = 0;
1913 }
1914
1915
1916 SM_STATE(WPA_PTK, PTKSTART)
1917 {
1918 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1919 size_t pmkid_len = 0;
1920
1921 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1922 sm->PTKRequest = FALSE;
1923 sm->TimeoutEvt = FALSE;
1924 sm->alt_snonce_valid = FALSE;
1925
1926 sm->TimeoutCtr++;
1927 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1928 /* No point in sending the EAPOL-Key - we will disconnect
1929 * immediately following this. */
1930 return;
1931 }
1932
1933 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1934 "sending 1/4 msg of 4-Way Handshake");
1935 /*
1936 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1937 * one possible PSK for this STA.
1938 */
1939 if (sm->wpa == WPA_VERSION_WPA2 &&
1940 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1941 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
1942 pmkid = buf;
1943 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1944 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1945 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1946 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1947 if (sm->pmksa) {
1948 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1949 sm->pmksa->pmkid, PMKID_LEN);
1950 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
1951 /* No KCK available to derive PMKID */
1952 pmkid = NULL;
1953 } else {
1954 /*
1955 * Calculate PMKID since no PMKSA cache entry was
1956 * available with pre-calculated PMKID.
1957 */
1958 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1959 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1960 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1961 }
1962 }
1963 wpa_send_eapol(sm->wpa_auth, sm,
1964 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1965 sm->ANonce, pmkid, pmkid_len, 0, 0);
1966 }
1967
1968
1969 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
1970 const u8 *pmk, struct wpa_ptk *ptk)
1971 {
1972 #ifdef CONFIG_IEEE80211R
1973 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1974 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1975 #endif /* CONFIG_IEEE80211R */
1976
1977 return wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1978 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
1979 ptk, sm->wpa_key_mgmt, sm->pairwise);
1980 }
1981
1982
1983 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1984 {
1985 struct wpa_ptk PTK;
1986 int ok = 0;
1987 const u8 *pmk = NULL;
1988
1989 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1990 sm->EAPOLKeyReceived = FALSE;
1991 sm->update_snonce = FALSE;
1992
1993 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1994 * WPA-PSK: iterate through possible PSKs and select the one matching
1995 * the packet */
1996 for (;;) {
1997 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1998 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
1999 sm->p2p_dev_addr, pmk);
2000 if (pmk == NULL)
2001 break;
2002 } else
2003 pmk = sm->PMK;
2004
2005 wpa_derive_ptk(sm, sm->SNonce, pmk, &PTK);
2006
2007 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK,
2008 sm->last_rx_eapol_key,
2009 sm->last_rx_eapol_key_len) == 0) {
2010 ok = 1;
2011 break;
2012 }
2013
2014 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
2015 break;
2016 }
2017
2018 if (!ok) {
2019 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2020 "invalid MIC in msg 2/4 of 4-Way Handshake");
2021 return;
2022 }
2023
2024 #ifdef CONFIG_IEEE80211R
2025 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2026 /*
2027 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2028 * with the value we derived.
2029 */
2030 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2031 WPA_PMK_NAME_LEN) != 0) {
2032 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2033 "PMKR1Name mismatch in FT 4-way "
2034 "handshake");
2035 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2036 "Supplicant",
2037 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2038 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2039 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2040 return;
2041 }
2042 }
2043 #endif /* CONFIG_IEEE80211R */
2044
2045 sm->pending_1_of_4_timeout = 0;
2046 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2047
2048 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2049 /* PSK may have changed from the previous choice, so update
2050 * state machine data based on whatever PSK was selected here.
2051 */
2052 os_memcpy(sm->PMK, pmk, PMK_LEN);
2053 }
2054
2055 sm->MICVerified = TRUE;
2056
2057 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2058 sm->PTK_valid = TRUE;
2059 }
2060
2061
2062 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2063 {
2064 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2065 sm->TimeoutCtr = 0;
2066 }
2067
2068
2069 #ifdef CONFIG_IEEE80211W
2070
2071 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2072 {
2073 if (sm->mgmt_frame_prot) {
2074 size_t len;
2075 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2076 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
2077 }
2078
2079 return 0;
2080 }
2081
2082
2083 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2084 {
2085 struct wpa_igtk_kde igtk;
2086 struct wpa_group *gsm = sm->group;
2087 u8 rsc[WPA_KEY_RSC_LEN];
2088 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2089
2090 if (!sm->mgmt_frame_prot)
2091 return pos;
2092
2093 igtk.keyid[0] = gsm->GN_igtk;
2094 igtk.keyid[1] = 0;
2095 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
2096 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
2097 os_memset(igtk.pn, 0, sizeof(igtk.pn));
2098 else
2099 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
2100 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
2101 if (sm->wpa_auth->conf.disable_gtk) {
2102 /*
2103 * Provide unique random IGTK to each STA to prevent use of
2104 * IGTK in the BSS.
2105 */
2106 if (random_get_bytes(igtk.igtk, len) < 0)
2107 return pos;
2108 }
2109 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
2110 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2111 NULL, 0);
2112
2113 return pos;
2114 }
2115
2116 #else /* CONFIG_IEEE80211W */
2117
2118 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2119 {
2120 return 0;
2121 }
2122
2123
2124 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2125 {
2126 return pos;
2127 }
2128
2129 #endif /* CONFIG_IEEE80211W */
2130
2131
2132 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2133 {
2134 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
2135 size_t gtk_len, kde_len;
2136 struct wpa_group *gsm = sm->group;
2137 u8 *wpa_ie;
2138 int wpa_ie_len, secure, keyidx, encr = 0;
2139
2140 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2141 sm->TimeoutEvt = FALSE;
2142
2143 sm->TimeoutCtr++;
2144 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
2145 /* No point in sending the EAPOL-Key - we will disconnect
2146 * immediately following this. */
2147 return;
2148 }
2149
2150 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2151 GTK[GN], IGTK, [FTIE], [TIE * 2])
2152 */
2153 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2154 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2155 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
2156 wpa_ie = sm->wpa_auth->wpa_ie;
2157 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2158 if (sm->wpa == WPA_VERSION_WPA &&
2159 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2160 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
2161 /* WPA-only STA, remove RSN IE and possible MDIE */
2162 wpa_ie = wpa_ie + wpa_ie[1] + 2;
2163 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2164 wpa_ie = wpa_ie + wpa_ie[1] + 2;
2165 wpa_ie_len = wpa_ie[1] + 2;
2166 }
2167 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2168 "sending 3/4 msg of 4-Way Handshake");
2169 if (sm->wpa == WPA_VERSION_WPA2) {
2170 /* WPA2 send GTK in the 4-way handshake */
2171 secure = 1;
2172 gtk = gsm->GTK[gsm->GN - 1];
2173 gtk_len = gsm->GTK_len;
2174 if (sm->wpa_auth->conf.disable_gtk) {
2175 /*
2176 * Provide unique random GTK to each STA to prevent use
2177 * of GTK in the BSS.
2178 */
2179 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2180 return;
2181 gtk = dummy_gtk;
2182 }
2183 keyidx = gsm->GN;
2184 _rsc = rsc;
2185 encr = 1;
2186 } else {
2187 /* WPA does not include GTK in msg 3/4 */
2188 secure = 0;
2189 gtk = NULL;
2190 gtk_len = 0;
2191 keyidx = 0;
2192 _rsc = NULL;
2193 if (sm->rx_eapol_key_secure) {
2194 /*
2195 * It looks like Windows 7 supplicant tries to use
2196 * Secure bit in msg 2/4 after having reported Michael
2197 * MIC failure and it then rejects the 4-way handshake
2198 * if msg 3/4 does not set Secure bit. Work around this
2199 * by setting the Secure bit here even in the case of
2200 * WPA if the supplicant used it first.
2201 */
2202 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2203 "STA used Secure bit in WPA msg 2/4 - "
2204 "set Secure for 3/4 as workaround");
2205 secure = 1;
2206 }
2207 }
2208
2209 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2210 if (gtk)
2211 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
2212 #ifdef CONFIG_IEEE80211R
2213 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2214 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2215 kde_len += 300; /* FTIE + 2 * TIE */
2216 }
2217 #endif /* CONFIG_IEEE80211R */
2218 #ifdef CONFIG_P2P
2219 if (WPA_GET_BE32(sm->ip_addr) > 0)
2220 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2221 #endif /* CONFIG_P2P */
2222 kde = os_malloc(kde_len);
2223 if (kde == NULL)
2224 return;
2225
2226 pos = kde;
2227 os_memcpy(pos, wpa_ie, wpa_ie_len);
2228 pos += wpa_ie_len;
2229 #ifdef CONFIG_IEEE80211R
2230 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2231 int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
2232 if (res < 0) {
2233 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2234 "PMKR1Name into RSN IE in EAPOL-Key data");
2235 os_free(kde);
2236 return;
2237 }
2238 pos += res;
2239 }
2240 #endif /* CONFIG_IEEE80211R */
2241 if (gtk) {
2242 u8 hdr[2];
2243 hdr[0] = keyidx & 0x03;
2244 hdr[1] = 0;
2245 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2246 gtk, gtk_len);
2247 }
2248 pos = ieee80211w_kde_add(sm, pos);
2249
2250 #ifdef CONFIG_IEEE80211R
2251 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2252 int res;
2253 struct wpa_auth_config *conf;
2254
2255 conf = &sm->wpa_auth->conf;
2256 res = wpa_write_ftie(conf, conf->r0_key_holder,
2257 conf->r0_key_holder_len,
2258 NULL, NULL, pos, kde + kde_len - pos,
2259 NULL, 0);
2260 if (res < 0) {
2261 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2262 "into EAPOL-Key Key Data");
2263 os_free(kde);
2264 return;
2265 }
2266 pos += res;
2267
2268 /* TIE[ReassociationDeadline] (TU) */
2269 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2270 *pos++ = 5;
2271 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2272 WPA_PUT_LE32(pos, conf->reassociation_deadline);
2273 pos += 4;
2274
2275 /* TIE[KeyLifetime] (seconds) */
2276 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2277 *pos++ = 5;
2278 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2279 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2280 pos += 4;
2281 }
2282 #endif /* CONFIG_IEEE80211R */
2283 #ifdef CONFIG_P2P
2284 if (WPA_GET_BE32(sm->ip_addr) > 0) {
2285 u8 addr[3 * 4];
2286 os_memcpy(addr, sm->ip_addr, 4);
2287 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2288 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2289 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2290 addr, sizeof(addr), NULL, 0);
2291 }
2292 #endif /* CONFIG_P2P */
2293
2294 wpa_send_eapol(sm->wpa_auth, sm,
2295 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
2296 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2297 WPA_KEY_INFO_KEY_TYPE,
2298 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2299 os_free(kde);
2300 }
2301
2302
2303 SM_STATE(WPA_PTK, PTKINITDONE)
2304 {
2305 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2306 sm->EAPOLKeyReceived = FALSE;
2307 if (sm->Pair) {
2308 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2309 int klen = wpa_cipher_key_len(sm->pairwise);
2310 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2311 sm->PTK.tk, klen)) {
2312 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2313 return;
2314 }
2315 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2316 sm->pairwise_set = TRUE;
2317
2318 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2319 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2320 eloop_register_timeout(sm->wpa_auth->conf.
2321 wpa_ptk_rekey, 0, wpa_rekey_ptk,
2322 sm->wpa_auth, sm);
2323 }
2324
2325 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2326 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2327 WPA_EAPOL_authorized, 1);
2328 }
2329 }
2330
2331 if (0 /* IBSS == TRUE */) {
2332 sm->keycount++;
2333 if (sm->keycount == 2) {
2334 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2335 WPA_EAPOL_portValid, 1);
2336 }
2337 } else {
2338 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2339 1);
2340 }
2341 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2342 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2343 if (sm->wpa == WPA_VERSION_WPA)
2344 sm->PInitAKeys = TRUE;
2345 else
2346 sm->has_GTK = TRUE;
2347 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2348 "pairwise key handshake completed (%s)",
2349 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2350
2351 #ifdef CONFIG_IEEE80211R
2352 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2353 #endif /* CONFIG_IEEE80211R */
2354 }
2355
2356
2357 SM_STEP(WPA_PTK)
2358 {
2359 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2360
2361 if (sm->Init)
2362 SM_ENTER(WPA_PTK, INITIALIZE);
2363 else if (sm->Disconnect
2364 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2365 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2366 "WPA_PTK: sm->Disconnect");
2367 SM_ENTER(WPA_PTK, DISCONNECT);
2368 }
2369 else if (sm->DeauthenticationRequest)
2370 SM_ENTER(WPA_PTK, DISCONNECTED);
2371 else if (sm->AuthenticationRequest)
2372 SM_ENTER(WPA_PTK, AUTHENTICATION);
2373 else if (sm->ReAuthenticationRequest)
2374 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2375 else if (sm->PTKRequest)
2376 SM_ENTER(WPA_PTK, PTKSTART);
2377 else switch (sm->wpa_ptk_state) {
2378 case WPA_PTK_INITIALIZE:
2379 break;
2380 case WPA_PTK_DISCONNECT:
2381 SM_ENTER(WPA_PTK, DISCONNECTED);
2382 break;
2383 case WPA_PTK_DISCONNECTED:
2384 SM_ENTER(WPA_PTK, INITIALIZE);
2385 break;
2386 case WPA_PTK_AUTHENTICATION:
2387 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2388 break;
2389 case WPA_PTK_AUTHENTICATION2:
2390 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
2391 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2392 WPA_EAPOL_keyRun) > 0)
2393 SM_ENTER(WPA_PTK, INITPMK);
2394 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
2395 /* FIX: && 802.1X::keyRun */)
2396 SM_ENTER(WPA_PTK, INITPSK);
2397 break;
2398 case WPA_PTK_INITPMK:
2399 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2400 WPA_EAPOL_keyAvailable) > 0)
2401 SM_ENTER(WPA_PTK, PTKSTART);
2402 else {
2403 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2404 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2405 "INITPMK - keyAvailable = false");
2406 SM_ENTER(WPA_PTK, DISCONNECT);
2407 }
2408 break;
2409 case WPA_PTK_INITPSK:
2410 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2411 NULL))
2412 SM_ENTER(WPA_PTK, PTKSTART);
2413 else {
2414 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2415 "no PSK configured for the STA");
2416 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2417 SM_ENTER(WPA_PTK, DISCONNECT);
2418 }
2419 break;
2420 case WPA_PTK_PTKSTART:
2421 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2422 sm->EAPOLKeyPairwise)
2423 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2424 else if (sm->TimeoutCtr >
2425 (int) dot11RSNAConfigPairwiseUpdateCount) {
2426 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2427 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2428 "PTKSTART: Retry limit %d reached",
2429 dot11RSNAConfigPairwiseUpdateCount);
2430 SM_ENTER(WPA_PTK, DISCONNECT);
2431 } else if (sm->TimeoutEvt)
2432 SM_ENTER(WPA_PTK, PTKSTART);
2433 break;
2434 case WPA_PTK_PTKCALCNEGOTIATING:
2435 if (sm->MICVerified)
2436 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2437 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2438 sm->EAPOLKeyPairwise)
2439 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2440 else if (sm->TimeoutEvt)
2441 SM_ENTER(WPA_PTK, PTKSTART);
2442 break;
2443 case WPA_PTK_PTKCALCNEGOTIATING2:
2444 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2445 break;
2446 case WPA_PTK_PTKINITNEGOTIATING:
2447 if (sm->update_snonce)
2448 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2449 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2450 sm->EAPOLKeyPairwise && sm->MICVerified)
2451 SM_ENTER(WPA_PTK, PTKINITDONE);
2452 else if (sm->TimeoutCtr >
2453 (int) dot11RSNAConfigPairwiseUpdateCount) {
2454 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2455 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2456 "PTKINITNEGOTIATING: Retry limit %d "
2457 "reached",
2458 dot11RSNAConfigPairwiseUpdateCount);
2459 SM_ENTER(WPA_PTK, DISCONNECT);
2460 } else if (sm->TimeoutEvt)
2461 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2462 break;
2463 case WPA_PTK_PTKINITDONE:
2464 break;
2465 }
2466 }
2467
2468
2469 SM_STATE(WPA_PTK_GROUP, IDLE)
2470 {
2471 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2472 if (sm->Init) {
2473 /* Init flag is not cleared here, so avoid busy
2474 * loop by claiming nothing changed. */
2475 sm->changed = FALSE;
2476 }
2477 sm->GTimeoutCtr = 0;
2478 }
2479
2480
2481 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2482 {
2483 u8 rsc[WPA_KEY_RSC_LEN];
2484 struct wpa_group *gsm = sm->group;
2485 const u8 *kde;
2486 u8 *kde_buf = NULL, *pos, hdr[2];
2487 size_t kde_len;
2488 u8 *gtk, dummy_gtk[32];
2489
2490 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
2491
2492 sm->GTimeoutCtr++;
2493 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2494 /* No point in sending the EAPOL-Key - we will disconnect
2495 * immediately following this. */
2496 return;
2497 }
2498
2499 if (sm->wpa == WPA_VERSION_WPA)
2500 sm->PInitAKeys = FALSE;
2501 sm->TimeoutEvt = FALSE;
2502 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2503 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2504 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2505 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2506 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2507 "sending 1/2 msg of Group Key Handshake");
2508
2509 gtk = gsm->GTK[gsm->GN - 1];
2510 if (sm->wpa_auth->conf.disable_gtk) {
2511 /*
2512 * Provide unique random GTK to each STA to prevent use
2513 * of GTK in the BSS.
2514 */
2515 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
2516 return;
2517 gtk = dummy_gtk;
2518 }
2519 if (sm->wpa == WPA_VERSION_WPA2) {
2520 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2521 ieee80211w_kde_len(sm);
2522 kde_buf = os_malloc(kde_len);
2523 if (kde_buf == NULL)
2524 return;
2525
2526 kde = pos = kde_buf;
2527 hdr[0] = gsm->GN & 0x03;
2528 hdr[1] = 0;
2529 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2530 gtk, gsm->GTK_len);
2531 pos = ieee80211w_kde_add(sm, pos);
2532 kde_len = pos - kde;
2533 } else {
2534 kde = gtk;
2535 kde_len = gsm->GTK_len;
2536 }
2537
2538 wpa_send_eapol(sm->wpa_auth, sm,
2539 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2540 WPA_KEY_INFO_ACK |
2541 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2542 rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1);
2543
2544 os_free(kde_buf);
2545 }
2546
2547
2548 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2549 {
2550 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2551 sm->EAPOLKeyReceived = FALSE;
2552 if (sm->GUpdateStationKeys)
2553 sm->group->GKeyDoneStations--;
2554 sm->GUpdateStationKeys = FALSE;
2555 sm->GTimeoutCtr = 0;
2556 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2557 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2558 "group key handshake completed (%s)",
2559 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2560 sm->has_GTK = TRUE;
2561 }
2562
2563
2564 SM_STATE(WPA_PTK_GROUP, KEYERROR)
2565 {
2566 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2567 if (sm->GUpdateStationKeys)
2568 sm->group->GKeyDoneStations--;
2569 sm->GUpdateStationKeys = FALSE;
2570 sm->Disconnect = TRUE;
2571 }
2572
2573
2574 SM_STEP(WPA_PTK_GROUP)
2575 {
2576 if (sm->Init || sm->PtkGroupInit) {
2577 SM_ENTER(WPA_PTK_GROUP, IDLE);
2578 sm->PtkGroupInit = FALSE;
2579 } else switch (sm->wpa_ptk_group_state) {
2580 case WPA_PTK_GROUP_IDLE:
2581 if (sm->GUpdateStationKeys ||
2582 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2583 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2584 break;
2585 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2586 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2587 !sm->EAPOLKeyPairwise && sm->MICVerified)
2588 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2589 else if (sm->GTimeoutCtr >
2590 (int) dot11RSNAConfigGroupUpdateCount)
2591 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2592 else if (sm->TimeoutEvt)
2593 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2594 break;
2595 case WPA_PTK_GROUP_KEYERROR:
2596 SM_ENTER(WPA_PTK_GROUP, IDLE);
2597 break;
2598 case WPA_PTK_GROUP_REKEYESTABLISHED:
2599 SM_ENTER(WPA_PTK_GROUP, IDLE);
2600 break;
2601 }
2602 }
2603
2604
2605 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2606 struct wpa_group *group)
2607 {
2608 int ret = 0;
2609
2610 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2611 inc_byte_array(group->Counter, WPA_NONCE_LEN);
2612 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2613 wpa_auth->addr, group->GNonce,
2614 group->GTK[group->GN - 1], group->GTK_len) < 0)
2615 ret = -1;
2616 wpa_hexdump_key(MSG_DEBUG, "GTK",
2617 group->GTK[group->GN - 1], group->GTK_len);
2618
2619 #ifdef CONFIG_IEEE80211W
2620 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2621 size_t len;
2622 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2623 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2624 inc_byte_array(group->Counter, WPA_NONCE_LEN);
2625 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2626 wpa_auth->addr, group->GNonce,
2627 group->IGTK[group->GN_igtk - 4], len) < 0)
2628 ret = -1;
2629 wpa_hexdump_key(MSG_DEBUG, "IGTK",
2630 group->IGTK[group->GN_igtk - 4], len);
2631 }
2632 #endif /* CONFIG_IEEE80211W */
2633
2634 return ret;
2635 }
2636
2637
2638 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2639 struct wpa_group *group)
2640 {
2641 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2642 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2643 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2644 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2645
2646 /* GTK[0..N] = 0 */
2647 os_memset(group->GTK, 0, sizeof(group->GTK));
2648 group->GN = 1;
2649 group->GM = 2;
2650 #ifdef CONFIG_IEEE80211W
2651 group->GN_igtk = 4;
2652 group->GM_igtk = 5;
2653 #endif /* CONFIG_IEEE80211W */
2654 /* GTK[GN] = CalcGTK() */
2655 wpa_gtk_update(wpa_auth, group);
2656 }
2657
2658
2659 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2660 {
2661 if (ctx != NULL && ctx != sm->group)
2662 return 0;
2663
2664 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2665 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2666 "Not in PTKINITDONE; skip Group Key update");
2667 sm->GUpdateStationKeys = FALSE;
2668 return 0;
2669 }
2670 if (sm->GUpdateStationKeys) {
2671 /*
2672 * This should not really happen, so add a debug log entry.
2673 * Since we clear the GKeyDoneStations before the loop, the
2674 * station needs to be counted here anyway.
2675 */
2676 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2677 "GUpdateStationKeys was already set when "
2678 "marking station for GTK rekeying");
2679 }
2680
2681 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
2682 if (sm->is_wnmsleep)
2683 return 0;
2684
2685 sm->group->GKeyDoneStations++;
2686 sm->GUpdateStationKeys = TRUE;
2687
2688 wpa_sm_step(sm);
2689 return 0;
2690 }
2691
2692
2693 #ifdef CONFIG_WNM
2694 /* update GTK when exiting WNM-Sleep Mode */
2695 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
2696 {
2697 if (sm == NULL || sm->is_wnmsleep)
2698 return;
2699
2700 wpa_group_update_sta(sm, NULL);
2701 }
2702
2703
2704 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
2705 {
2706 if (sm)
2707 sm->is_wnmsleep = !!flag;
2708 }
2709
2710
2711 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2712 {
2713 struct wpa_group *gsm = sm->group;
2714 u8 *start = pos;
2715
2716 /*
2717 * GTK subelement:
2718 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2719 * Key[5..32]
2720 */
2721 *pos++ = WNM_SLEEP_SUBELEM_GTK;
2722 *pos++ = 11 + gsm->GTK_len;
2723 /* Key ID in B0-B1 of Key Info */
2724 WPA_PUT_LE16(pos, gsm->GN & 0x03);
2725 pos += 2;
2726 *pos++ = gsm->GTK_len;
2727 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
2728 return 0;
2729 pos += 8;
2730 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2731 pos += gsm->GTK_len;
2732
2733 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
2734 gsm->GN);
2735 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
2736 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2737
2738 return pos - start;
2739 }
2740
2741
2742 #ifdef CONFIG_IEEE80211W
2743 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2744 {
2745 struct wpa_group *gsm = sm->group;
2746 u8 *start = pos;
2747 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2748
2749 /*
2750 * IGTK subelement:
2751 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
2752 */
2753 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
2754 *pos++ = 2 + 6 + len;
2755 WPA_PUT_LE16(pos, gsm->GN_igtk);
2756 pos += 2;
2757 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
2758 return 0;
2759 pos += 6;
2760
2761 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
2762 pos += len;
2763
2764 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
2765 gsm->GN_igtk);
2766 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
2767 gsm->IGTK[gsm->GN_igtk - 4], len);
2768
2769 return pos - start;
2770 }
2771 #endif /* CONFIG_IEEE80211W */
2772 #endif /* CONFIG_WNM */
2773
2774
2775 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2776 struct wpa_group *group)
2777 {
2778 int tmp;
2779
2780 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2781 "SETKEYS (VLAN-ID %d)", group->vlan_id);
2782 group->changed = TRUE;
2783 group->wpa_group_state = WPA_GROUP_SETKEYS;
2784 group->GTKReKey = FALSE;
2785 tmp = group->GM;
2786 group->GM = group->GN;
2787 group->GN = tmp;
2788 #ifdef CONFIG_IEEE80211W
2789 tmp = group->GM_igtk;
2790 group->GM_igtk = group->GN_igtk;
2791 group->GN_igtk = tmp;
2792 #endif /* CONFIG_IEEE80211W */
2793 /* "GKeyDoneStations = GNoStations" is done in more robust way by
2794 * counting the STAs that are marked with GUpdateStationKeys instead of
2795 * including all STAs that could be in not-yet-completed state. */
2796 wpa_gtk_update(wpa_auth, group);
2797
2798 if (group->GKeyDoneStations) {
2799 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2800 "GKeyDoneStations=%d when starting new GTK rekey",
2801 group->GKeyDoneStations);
2802 group->GKeyDoneStations = 0;
2803 }
2804 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
2805 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2806 group->GKeyDoneStations);
2807 }
2808
2809
2810 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2811 struct wpa_group *group)
2812 {
2813 int ret = 0;
2814
2815 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
2816 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
2817 broadcast_ether_addr, group->GN,
2818 group->GTK[group->GN - 1], group->GTK_len) < 0)
2819 ret = -1;
2820
2821 #ifdef CONFIG_IEEE80211W
2822 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2823 enum wpa_alg alg;
2824 size_t len;
2825
2826 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
2827 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2828
2829 if (ret == 0 &&
2830 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
2831 broadcast_ether_addr, group->GN_igtk,
2832 group->IGTK[group->GN_igtk - 4], len) < 0)
2833 ret = -1;
2834 }
2835 #endif /* CONFIG_IEEE80211W */
2836
2837 return ret;
2838 }
2839
2840
2841 static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
2842 {
2843 if (sm->group == ctx) {
2844 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
2845 " for discconnection due to fatal failure",
2846 MAC2STR(sm->addr));
2847 sm->Disconnect = TRUE;
2848 }
2849
2850 return 0;
2851 }
2852
2853
2854 static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
2855 struct wpa_group *group)
2856 {
2857 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
2858 group->changed = TRUE;
2859 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
2860 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
2861 }
2862
2863
2864 static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2865 struct wpa_group *group)
2866 {
2867 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2868 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2869 group->changed = TRUE;
2870 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2871
2872 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
2873 wpa_group_fatal_failure(wpa_auth, group);
2874 return -1;
2875 }
2876
2877 return 0;
2878 }
2879
2880
2881 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2882 struct wpa_group *group)
2883 {
2884 if (group->GInit) {
2885 wpa_group_gtk_init(wpa_auth, group);
2886 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
2887 /* Do not allow group operations */
2888 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2889 group->GTKAuthenticator) {
2890 wpa_group_setkeysdone(wpa_auth, group);
2891 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2892 group->GTKReKey) {
2893 wpa_group_setkeys(wpa_auth, group);
2894 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2895 if (group->GKeyDoneStations == 0)
2896 wpa_group_setkeysdone(wpa_auth, group);
2897 else if (group->GTKReKey)
2898 wpa_group_setkeys(wpa_auth, group);
2899 }
2900 }
2901
2902
2903 static int wpa_sm_step(struct wpa_state_machine *sm)
2904 {
2905 if (sm == NULL)
2906 return 0;
2907
2908 if (sm->in_step_loop) {
2909 /* This should not happen, but if it does, make sure we do not
2910 * end up freeing the state machine too early by exiting the
2911 * recursive call. */
2912 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2913 return 0;
2914 }
2915
2916 sm->in_step_loop = 1;
2917 do {
2918 if (sm->pending_deinit)
2919 break;
2920
2921 sm->changed = FALSE;
2922 sm->wpa_auth->group->changed = FALSE;
2923
2924 SM_STEP_RUN(WPA_PTK);
2925 if (sm->pending_deinit)
2926 break;
2927 SM_STEP_RUN(WPA_PTK_GROUP);
2928 if (sm->pending_deinit)
2929 break;
2930 wpa_group_sm_step(sm->wpa_auth, sm->group);
2931 } while (sm->changed || sm->wpa_auth->group->changed);
2932 sm->in_step_loop = 0;
2933
2934 if (sm->pending_deinit) {
2935 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2936 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2937 wpa_free_sta_sm(sm);
2938 return 1;
2939 }
2940 return 0;
2941 }
2942
2943
2944 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2945 {
2946 struct wpa_state_machine *sm = eloop_ctx;
2947 wpa_sm_step(sm);
2948 }
2949
2950
2951 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2952 {
2953 if (sm == NULL)
2954 return;
2955 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2956 }
2957
2958
2959 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2960 {
2961 int tmp, i;
2962 struct wpa_group *group;
2963
2964 if (wpa_auth == NULL)
2965 return;
2966
2967 group = wpa_auth->group;
2968
2969 for (i = 0; i < 2; i++) {
2970 tmp = group->GM;
2971 group->GM = group->GN;
2972 group->GN = tmp;
2973 #ifdef CONFIG_IEEE80211W
2974 tmp = group->GM_igtk;
2975 group->GM_igtk = group->GN_igtk;
2976 group->GN_igtk = tmp;
2977 #endif /* CONFIG_IEEE80211W */
2978 wpa_gtk_update(wpa_auth, group);
2979 wpa_group_config_group_keys(wpa_auth, group);
2980 }
2981 }
2982
2983
2984 static const char * wpa_bool_txt(int bool)
2985 {
2986 return bool ? "TRUE" : "FALSE";
2987 }
2988
2989
2990 #define RSN_SUITE "%02x-%02x-%02x-%d"
2991 #define RSN_SUITE_ARG(s) \
2992 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2993
2994 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2995 {
2996 int len = 0, ret;
2997 char pmkid_txt[PMKID_LEN * 2 + 1];
2998 #ifdef CONFIG_RSN_PREAUTH
2999 const int preauth = 1;
3000 #else /* CONFIG_RSN_PREAUTH */
3001 const int preauth = 0;
3002 #endif /* CONFIG_RSN_PREAUTH */
3003
3004 if (wpa_auth == NULL)
3005 return len;
3006
3007 ret = os_snprintf(buf + len, buflen - len,
3008 "dot11RSNAOptionImplemented=TRUE\n"
3009 "dot11RSNAPreauthenticationImplemented=%s\n"
3010 "dot11RSNAEnabled=%s\n"
3011 "dot11RSNAPreauthenticationEnabled=%s\n",
3012 wpa_bool_txt(preauth),
3013 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3014 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
3015 if (os_snprintf_error(buflen - len, ret))
3016 return len;
3017 len += ret;
3018
3019 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3020 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3021
3022 ret = os_snprintf(
3023 buf + len, buflen - len,
3024 "dot11RSNAConfigVersion=%u\n"
3025 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3026 /* FIX: dot11RSNAConfigGroupCipher */
3027 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3028 /* FIX: dot11RSNAConfigGroupRekeyTime */
3029 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3030 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3031 "dot11RSNAConfigGroupUpdateCount=%u\n"
3032 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3033 "dot11RSNAConfigGroupCipherSize=%u\n"
3034 "dot11RSNAConfigPMKLifetime=%u\n"
3035 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3036 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3037 "dot11RSNAConfigSATimeout=%u\n"
3038 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3039 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3040 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3041 "dot11RSNAPMKIDUsed=%s\n"
3042 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3043 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3044 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3045 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3046 "dot11RSNA4WayHandshakeFailures=%u\n"
3047 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3048 RSN_VERSION,
3049 !!wpa_auth->conf.wpa_strict_rekey,
3050 dot11RSNAConfigGroupUpdateCount,
3051 dot11RSNAConfigPairwiseUpdateCount,
3052 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
3053 dot11RSNAConfigPMKLifetime,
3054 dot11RSNAConfigPMKReauthThreshold,
3055 dot11RSNAConfigSATimeout,
3056 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3057 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3058 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3059 pmkid_txt,
3060 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3061 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3062 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3063 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3064 wpa_auth->dot11RSNA4WayHandshakeFailures);
3065 if (os_snprintf_error(buflen - len, ret))
3066 return len;
3067 len += ret;
3068
3069 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3070 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3071
3072 /* Private MIB */
3073 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3074 wpa_auth->group->wpa_group_state);
3075 if (os_snprintf_error(buflen - len, ret))
3076 return len;
3077 len += ret;
3078
3079 return len;
3080 }
3081
3082
3083 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3084 {
3085 int len = 0, ret;
3086 u32 pairwise = 0;
3087
3088 if (sm == NULL)
3089 return 0;
3090
3091 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3092
3093 /* dot11RSNAStatsEntry */
3094
3095 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3096 WPA_PROTO_RSN : WPA_PROTO_WPA,
3097 sm->pairwise);
3098 if (pairwise == 0)
3099 return 0;
3100
3101 ret = os_snprintf(
3102 buf + len, buflen - len,
3103 /* TODO: dot11RSNAStatsIndex */
3104 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3105 "dot11RSNAStatsVersion=1\n"
3106 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3107 /* TODO: dot11RSNAStatsTKIPICVErrors */
3108 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
3109 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
3110 /* TODO: dot11RSNAStatsCCMPReplays */
3111 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3112 /* TODO: dot11RSNAStatsTKIPReplays */,
3113 MAC2STR(sm->addr),
3114 RSN_SUITE_ARG(pairwise),
3115 sm->dot11RSNAStatsTKIPLocalMICFailures,
3116 sm->dot11RSNAStatsTKIPRemoteMICFailures);
3117 if (os_snprintf_error(buflen - len, ret))
3118 return len;
3119 len += ret;
3120
3121 /* Private MIB */
3122 ret = os_snprintf(buf + len, buflen - len,
3123 "hostapdWPAPTKState=%d\n"
3124 "hostapdWPAPTKGroupState=%d\n",
3125 sm->wpa_ptk_state,
3126 sm->wpa_ptk_group_state);
3127 if (os_snprintf_error(buflen - len, ret))
3128 return len;
3129 len += ret;
3130
3131 return len;
3132 }
3133
3134
3135 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3136 {
3137 if (wpa_auth)
3138 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3139 }
3140
3141
3142 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3143 {
3144 return sm && sm->pairwise_set;
3145 }
3146
3147
3148 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3149 {
3150 return sm->pairwise;
3151 }
3152
3153
3154 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3155 {
3156 if (sm == NULL)
3157 return -1;
3158 return sm->wpa_key_mgmt;
3159 }
3160
3161
3162 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3163 {
3164 if (sm == NULL)
3165 return 0;
3166 return sm->wpa;
3167 }
3168
3169
3170 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3171 struct rsn_pmksa_cache_entry *entry)
3172 {
3173 if (sm == NULL || sm->pmksa != entry)
3174 return -1;
3175 sm->pmksa = NULL;
3176 return 0;
3177 }
3178
3179
3180 struct rsn_pmksa_cache_entry *
3181 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3182 {
3183 return sm ? sm->pmksa : NULL;
3184 }
3185
3186
3187 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3188 {
3189 if (sm)
3190 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3191 }
3192
3193
3194 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3195 {
3196 if (wpa_auth == NULL)
3197 return NULL;
3198 *len = wpa_auth->wpa_ie_len;
3199 return wpa_auth->wpa_ie;
3200 }
3201
3202
3203 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
3204 int session_timeout, struct eapol_state_machine *eapol)
3205 {
3206 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3207 sm->wpa_auth->conf.disable_pmksa_caching)
3208 return -1;
3209
3210 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
3211 sm->PTK.kck, sm->PTK.kck_len,
3212 sm->wpa_auth->addr, sm->addr, session_timeout,
3213 eapol, sm->wpa_key_mgmt))
3214 return 0;
3215
3216 return -1;
3217 }
3218
3219
3220 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3221 const u8 *pmk, size_t len, const u8 *sta_addr,
3222 int session_timeout,
3223 struct eapol_state_machine *eapol)
3224 {
3225 if (wpa_auth == NULL)
3226 return -1;
3227
3228 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len,
3229 NULL, 0,
3230 wpa_auth->addr,
3231 sta_addr, session_timeout, eapol,
3232 WPA_KEY_MGMT_IEEE8021X))
3233 return 0;
3234
3235 return -1;
3236 }
3237
3238
3239 int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
3240 const u8 *pmk)
3241 {
3242 if (wpa_auth->conf.disable_pmksa_caching)
3243 return -1;
3244
3245 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN,
3246 NULL, 0,
3247 wpa_auth->addr, addr, 0, NULL,
3248 WPA_KEY_MGMT_SAE))
3249 return 0;
3250
3251 return -1;
3252 }
3253
3254
3255 void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3256 const u8 *sta_addr)
3257 {
3258 struct rsn_pmksa_cache_entry *pmksa;
3259
3260 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3261 return;
3262 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3263 if (pmksa) {
3264 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3265 MACSTR " based on request", MAC2STR(sta_addr));
3266 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3267 }
3268 }
3269
3270
3271 static struct wpa_group *
3272 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3273 {
3274 struct wpa_group *group;
3275
3276 if (wpa_auth == NULL || wpa_auth->group == NULL)
3277 return NULL;
3278
3279 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
3280 vlan_id);
3281 group = wpa_group_init(wpa_auth, vlan_id, 0);
3282 if (group == NULL)
3283 return NULL;
3284
3285 group->next = wpa_auth->group->next;
3286 wpa_auth->group->next = group;
3287
3288 return group;
3289 }
3290
3291
3292 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
3293 {
3294 struct wpa_group *group;
3295
3296 if (sm == NULL || sm->wpa_auth == NULL)
3297 return 0;
3298
3299 group = sm->wpa_auth->group;
3300 while (group) {
3301 if (group->vlan_id == vlan_id)
3302 break;
3303 group = group->next;
3304 }
3305
3306 if (group == NULL) {
3307 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
3308 if (group == NULL)
3309 return -1;
3310 }
3311
3312 if (sm->group == group)
3313 return 0;
3314
3315 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3316 return -1;
3317
3318 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
3319 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
3320
3321 sm->group = group;
3322 return 0;
3323 }
3324
3325
3326 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
3327 struct wpa_state_machine *sm, int ack)
3328 {
3329 if (wpa_auth == NULL || sm == NULL)
3330 return;
3331 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
3332 " ack=%d", MAC2STR(sm->addr), ack);
3333 if (sm->pending_1_of_4_timeout && ack) {
3334 /*
3335 * Some deployed supplicant implementations update their SNonce
3336 * for each EAPOL-Key 2/4 message even within the same 4-way
3337 * handshake and then fail to use the first SNonce when
3338 * deriving the PTK. This results in unsuccessful 4-way
3339 * handshake whenever the relatively short initial timeout is
3340 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
3341 * around this by increasing the timeout now that we know that
3342 * the station has received the frame.
3343 */
3344 int timeout_ms = eapol_key_timeout_subseq;
3345 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
3346 "timeout by %u ms because of acknowledged frame",
3347 timeout_ms);
3348 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
3349 eloop_register_timeout(timeout_ms / 1000,
3350 (timeout_ms % 1000) * 1000,
3351 wpa_send_eapol_timeout, wpa_auth, sm);
3352 }
3353 }
3354
3355
3356 int wpa_auth_uses_sae(struct wpa_state_machine *sm)
3357 {
3358 if (sm == NULL)
3359 return 0;
3360 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
3361 }
3362
3363
3364 int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
3365 {
3366 if (sm == NULL)
3367 return 0;
3368 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
3369 }
3370
3371
3372 #ifdef CONFIG_P2P
3373 int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
3374 {
3375 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
3376 return -1;
3377 os_memcpy(addr, sm->ip_addr, 4);
3378 return 0;
3379 }
3380 #endif /* CONFIG_P2P */
3381
3382
3383 int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
3384 struct radius_das_attrs *attr)
3385 {
3386 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
3387 }
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