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hostapd: Avoid key reinstallation in FT handshake
[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.h"
17 #include "crypto/aes_wrap.h"
18 #include "crypto/aes_siv.h"
19 #include "crypto/crypto.h"
20 #include "crypto/sha1.h"
21 #include "crypto/sha256.h"
22 #include "crypto/random.h"
23 #include "eapol_auth/eapol_auth_sm.h"
24 #include "ap_config.h"
25 #include "ieee802_11.h"
26 #include "wpa_auth.h"
27 #include "pmksa_cache_auth.h"
28 #include "wpa_auth_i.h"
29 #include "wpa_auth_ie.h"
30
31 #define STATE_MACHINE_DATA struct wpa_state_machine
32 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
33 #define STATE_MACHINE_ADDR sm->addr
34
35
36 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
37 static int wpa_sm_step(struct wpa_state_machine *sm);
38 static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
39 u8 *data, size_t data_len);
40 #ifdef CONFIG_FILS
41 static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
42 u8 *buf, size_t buf_len, u16 *_key_data_len);
43 static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
44 const struct wpabuf *hlp);
45 #endif /* CONFIG_FILS */
46 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
47 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
48 struct wpa_group *group);
49 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
50 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
51 struct wpa_group *group);
52 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
53 struct wpa_group *group);
54 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
55 const u8 *pmk, unsigned int pmk_len,
56 struct wpa_ptk *ptk);
57 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
58 struct wpa_group *group);
59 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
60 struct wpa_group *group);
61 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
62 struct wpa_group *group);
63 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
64
65 static const u32 eapol_key_timeout_first = 100; /* ms */
66 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
67 static const u32 eapol_key_timeout_first_group = 500; /* ms */
68
69 /* TODO: make these configurable */
70 static const int dot11RSNAConfigPMKLifetime = 43200;
71 static const int dot11RSNAConfigPMKReauthThreshold = 70;
72 static const int dot11RSNAConfigSATimeout = 60;
73
74
75 static inline int wpa_auth_mic_failure_report(
76 struct wpa_authenticator *wpa_auth, const u8 *addr)
77 {
78 if (wpa_auth->cb->mic_failure_report)
79 return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
80 return 0;
81 }
82
83
84 static inline void wpa_auth_psk_failure_report(
85 struct wpa_authenticator *wpa_auth, const u8 *addr)
86 {
87 if (wpa_auth->cb->psk_failure_report)
88 wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
89 }
90
91
92 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
93 const u8 *addr, wpa_eapol_variable var,
94 int value)
95 {
96 if (wpa_auth->cb->set_eapol)
97 wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
98 }
99
100
101 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
102 const u8 *addr, wpa_eapol_variable var)
103 {
104 if (wpa_auth->cb->get_eapol == NULL)
105 return -1;
106 return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
107 }
108
109
110 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
111 const u8 *addr,
112 const u8 *p2p_dev_addr,
113 const u8 *prev_psk, size_t *psk_len)
114 {
115 if (wpa_auth->cb->get_psk == NULL)
116 return NULL;
117 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
118 prev_psk, psk_len);
119 }
120
121
122 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
123 const u8 *addr, u8 *msk, size_t *len)
124 {
125 if (wpa_auth->cb->get_msk == NULL)
126 return -1;
127 return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
128 }
129
130
131 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
132 int vlan_id,
133 enum wpa_alg alg, const u8 *addr, int idx,
134 u8 *key, size_t key_len)
135 {
136 if (wpa_auth->cb->set_key == NULL)
137 return -1;
138 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
139 key, key_len);
140 }
141
142
143 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
144 const u8 *addr, int idx, u8 *seq)
145 {
146 if (wpa_auth->cb->get_seqnum == NULL)
147 return -1;
148 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
149 }
150
151
152 static inline int
153 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
154 const u8 *data, size_t data_len, int encrypt)
155 {
156 if (wpa_auth->cb->send_eapol == NULL)
157 return -1;
158 return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
159 encrypt);
160 }
161
162
163 #ifdef CONFIG_MESH
164 static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
165 const u8 *addr)
166 {
167 if (wpa_auth->cb->start_ampe == NULL)
168 return -1;
169 return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
170 }
171 #endif /* CONFIG_MESH */
172
173
174 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
175 int (*cb)(struct wpa_state_machine *sm, void *ctx),
176 void *cb_ctx)
177 {
178 if (wpa_auth->cb->for_each_sta == NULL)
179 return 0;
180 return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
181 }
182
183
184 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
185 int (*cb)(struct wpa_authenticator *a, void *ctx),
186 void *cb_ctx)
187 {
188 if (wpa_auth->cb->for_each_auth == NULL)
189 return 0;
190 return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
191 }
192
193
194 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
195 logger_level level, const char *txt)
196 {
197 if (wpa_auth->cb->logger == NULL)
198 return;
199 wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
200 }
201
202
203 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
204 logger_level level, const char *fmt, ...)
205 {
206 char *format;
207 int maxlen;
208 va_list ap;
209
210 if (wpa_auth->cb->logger == NULL)
211 return;
212
213 maxlen = os_strlen(fmt) + 100;
214 format = os_malloc(maxlen);
215 if (!format)
216 return;
217
218 va_start(ap, fmt);
219 vsnprintf(format, maxlen, fmt, ap);
220 va_end(ap);
221
222 wpa_auth_logger(wpa_auth, addr, level, format);
223
224 os_free(format);
225 }
226
227
228 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
229 const u8 *addr, u16 reason)
230 {
231 if (wpa_auth->cb->disconnect == NULL)
232 return;
233 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)",
234 MAC2STR(addr), reason);
235 wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason);
236 }
237
238
239 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
240 {
241 int ret = 0;
242 #ifdef CONFIG_IEEE80211R_AP
243 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
244 ret = 1;
245 #endif /* CONFIG_IEEE80211R_AP */
246 #ifdef CONFIG_IEEE80211W
247 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
248 ret = 1;
249 #endif /* CONFIG_IEEE80211W */
250 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
251 ret = 1;
252 return ret;
253 }
254
255
256 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
257 {
258 struct wpa_authenticator *wpa_auth = eloop_ctx;
259
260 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
261 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
262 "initialization.");
263 } else {
264 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
265 wpa_hexdump_key(MSG_DEBUG, "GMK",
266 wpa_auth->group->GMK, WPA_GMK_LEN);
267 }
268
269 if (wpa_auth->conf.wpa_gmk_rekey) {
270 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
271 wpa_rekey_gmk, wpa_auth, NULL);
272 }
273 }
274
275
276 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
277 {
278 struct wpa_authenticator *wpa_auth = eloop_ctx;
279 struct wpa_group *group, *next;
280
281 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
282 group = wpa_auth->group;
283 while (group) {
284 wpa_group_get(wpa_auth, group);
285
286 group->GTKReKey = TRUE;
287 do {
288 group->changed = FALSE;
289 wpa_group_sm_step(wpa_auth, group);
290 } while (group->changed);
291
292 next = group->next;
293 wpa_group_put(wpa_auth, group);
294 group = next;
295 }
296
297 if (wpa_auth->conf.wpa_group_rekey) {
298 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
299 0, wpa_rekey_gtk, wpa_auth, NULL);
300 }
301 }
302
303
304 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
305 {
306 struct wpa_authenticator *wpa_auth = eloop_ctx;
307 struct wpa_state_machine *sm = timeout_ctx;
308
309 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
310 wpa_request_new_ptk(sm);
311 wpa_sm_step(sm);
312 }
313
314
315 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
316 {
317 if (sm->pmksa == ctx)
318 sm->pmksa = NULL;
319 return 0;
320 }
321
322
323 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
324 void *ctx)
325 {
326 struct wpa_authenticator *wpa_auth = ctx;
327 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
328 }
329
330
331 static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
332 struct wpa_group *group)
333 {
334 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
335 u8 rkey[32];
336 unsigned long ptr;
337
338 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
339 return -1;
340 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
341
342 /*
343 * Counter = PRF-256(Random number, "Init Counter",
344 * Local MAC Address || Time)
345 */
346 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
347 wpa_get_ntp_timestamp(buf + ETH_ALEN);
348 ptr = (unsigned long) group;
349 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
350 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
351 return -1;
352
353 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
354 group->Counter, WPA_NONCE_LEN) < 0)
355 return -1;
356 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
357 group->Counter, WPA_NONCE_LEN);
358
359 return 0;
360 }
361
362
363 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
364 int vlan_id, int delay_init)
365 {
366 struct wpa_group *group;
367
368 group = os_zalloc(sizeof(struct wpa_group));
369 if (group == NULL)
370 return NULL;
371
372 group->GTKAuthenticator = TRUE;
373 group->vlan_id = vlan_id;
374 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
375
376 if (random_pool_ready() != 1) {
377 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
378 "for secure operations - update keys later when "
379 "the first station connects");
380 }
381
382 /*
383 * Set initial GMK/Counter value here. The actual values that will be
384 * used in negotiations will be set once the first station tries to
385 * connect. This allows more time for collecting additional randomness
386 * on embedded devices.
387 */
388 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
389 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
390 "initialization.");
391 os_free(group);
392 return NULL;
393 }
394
395 group->GInit = TRUE;
396 if (delay_init) {
397 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
398 "until Beacon frames have been configured");
399 /* Initialization is completed in wpa_init_keys(). */
400 } else {
401 wpa_group_sm_step(wpa_auth, group);
402 group->GInit = FALSE;
403 wpa_group_sm_step(wpa_auth, group);
404 }
405
406 return group;
407 }
408
409
410 /**
411 * wpa_init - Initialize WPA authenticator
412 * @addr: Authenticator address
413 * @conf: Configuration for WPA authenticator
414 * @cb: Callback functions for WPA authenticator
415 * Returns: Pointer to WPA authenticator data or %NULL on failure
416 */
417 struct wpa_authenticator * wpa_init(const u8 *addr,
418 struct wpa_auth_config *conf,
419 const struct wpa_auth_callbacks *cb,
420 void *cb_ctx)
421 {
422 struct wpa_authenticator *wpa_auth;
423
424 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
425 if (wpa_auth == NULL)
426 return NULL;
427 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
428 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
429 wpa_auth->cb = cb;
430 wpa_auth->cb_ctx = cb_ctx;
431
432 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
433 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
434 os_free(wpa_auth);
435 return NULL;
436 }
437
438 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
439 if (wpa_auth->group == NULL) {
440 os_free(wpa_auth->wpa_ie);
441 os_free(wpa_auth);
442 return NULL;
443 }
444
445 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
446 wpa_auth);
447 if (wpa_auth->pmksa == NULL) {
448 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
449 os_free(wpa_auth->group);
450 os_free(wpa_auth->wpa_ie);
451 os_free(wpa_auth);
452 return NULL;
453 }
454
455 #ifdef CONFIG_IEEE80211R_AP
456 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
457 if (wpa_auth->ft_pmk_cache == NULL) {
458 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
459 os_free(wpa_auth->group);
460 os_free(wpa_auth->wpa_ie);
461 pmksa_cache_auth_deinit(wpa_auth->pmksa);
462 os_free(wpa_auth);
463 return NULL;
464 }
465 #endif /* CONFIG_IEEE80211R_AP */
466
467 if (wpa_auth->conf.wpa_gmk_rekey) {
468 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
469 wpa_rekey_gmk, wpa_auth, NULL);
470 }
471
472 if (wpa_auth->conf.wpa_group_rekey) {
473 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
474 wpa_rekey_gtk, wpa_auth, NULL);
475 }
476
477 #ifdef CONFIG_P2P
478 if (WPA_GET_BE32(conf->ip_addr_start)) {
479 int count = WPA_GET_BE32(conf->ip_addr_end) -
480 WPA_GET_BE32(conf->ip_addr_start) + 1;
481 if (count > 1000)
482 count = 1000;
483 if (count > 0)
484 wpa_auth->ip_pool = bitfield_alloc(count);
485 }
486 #endif /* CONFIG_P2P */
487
488 return wpa_auth;
489 }
490
491
492 int wpa_init_keys(struct wpa_authenticator *wpa_auth)
493 {
494 struct wpa_group *group = wpa_auth->group;
495
496 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
497 "keys");
498 wpa_group_sm_step(wpa_auth, group);
499 group->GInit = FALSE;
500 wpa_group_sm_step(wpa_auth, group);
501 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
502 return -1;
503 return 0;
504 }
505
506
507 /**
508 * wpa_deinit - Deinitialize WPA authenticator
509 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
510 */
511 void wpa_deinit(struct wpa_authenticator *wpa_auth)
512 {
513 struct wpa_group *group, *prev;
514
515 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
516 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
517
518 pmksa_cache_auth_deinit(wpa_auth->pmksa);
519
520 #ifdef CONFIG_IEEE80211R_AP
521 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
522 wpa_auth->ft_pmk_cache = NULL;
523 wpa_ft_deinit(wpa_auth);
524 #endif /* CONFIG_IEEE80211R_AP */
525
526 #ifdef CONFIG_P2P
527 bitfield_free(wpa_auth->ip_pool);
528 #endif /* CONFIG_P2P */
529
530
531 os_free(wpa_auth->wpa_ie);
532
533 group = wpa_auth->group;
534 while (group) {
535 prev = group;
536 group = group->next;
537 os_free(prev);
538 }
539
540 os_free(wpa_auth);
541 }
542
543
544 /**
545 * wpa_reconfig - Update WPA authenticator configuration
546 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
547 * @conf: Configuration for WPA authenticator
548 */
549 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
550 struct wpa_auth_config *conf)
551 {
552 struct wpa_group *group;
553 if (wpa_auth == NULL)
554 return 0;
555
556 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
557 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
558 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
559 return -1;
560 }
561
562 /*
563 * Reinitialize GTK to make sure it is suitable for the new
564 * configuration.
565 */
566 group = wpa_auth->group;
567 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
568 group->GInit = TRUE;
569 wpa_group_sm_step(wpa_auth, group);
570 group->GInit = FALSE;
571 wpa_group_sm_step(wpa_auth, group);
572
573 return 0;
574 }
575
576
577 struct wpa_state_machine *
578 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
579 const u8 *p2p_dev_addr)
580 {
581 struct wpa_state_machine *sm;
582
583 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
584 return NULL;
585
586 sm = os_zalloc(sizeof(struct wpa_state_machine));
587 if (sm == NULL)
588 return NULL;
589 os_memcpy(sm->addr, addr, ETH_ALEN);
590 if (p2p_dev_addr)
591 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
592
593 sm->wpa_auth = wpa_auth;
594 sm->group = wpa_auth->group;
595 wpa_group_get(sm->wpa_auth, sm->group);
596
597 return sm;
598 }
599
600
601 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
602 struct wpa_state_machine *sm)
603 {
604 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
605 return -1;
606
607 #ifdef CONFIG_IEEE80211R_AP
608 if (sm->ft_completed) {
609 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
610 "FT authentication already completed - do not "
611 "start 4-way handshake");
612 /* Go to PTKINITDONE state to allow GTK rekeying */
613 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
614 sm->Pair = TRUE;
615 return 0;
616 }
617 #endif /* CONFIG_IEEE80211R_AP */
618
619 #ifdef CONFIG_FILS
620 if (sm->fils_completed) {
621 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
622 "FILS authentication already completed - do not start 4-way handshake");
623 /* Go to PTKINITDONE state to allow GTK rekeying */
624 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
625 sm->Pair = TRUE;
626 return 0;
627 }
628 #endif /* CONFIG_FILS */
629
630 if (sm->started) {
631 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
632 sm->ReAuthenticationRequest = TRUE;
633 return wpa_sm_step(sm);
634 }
635
636 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
637 "start authentication");
638 sm->started = 1;
639
640 sm->Init = TRUE;
641 if (wpa_sm_step(sm) == 1)
642 return 1; /* should not really happen */
643 sm->Init = FALSE;
644 sm->AuthenticationRequest = TRUE;
645 return wpa_sm_step(sm);
646 }
647
648
649 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
650 {
651 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
652 * reassociates back to the same AP while the previous entry for the
653 * STA has not yet been removed. */
654 if (sm == NULL)
655 return;
656
657 sm->wpa_key_mgmt = 0;
658 }
659
660
661 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
662 {
663 #ifdef CONFIG_P2P
664 if (WPA_GET_BE32(sm->ip_addr)) {
665 u32 start;
666 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
667 "address %u.%u.%u.%u from " MACSTR,
668 sm->ip_addr[0], sm->ip_addr[1],
669 sm->ip_addr[2], sm->ip_addr[3],
670 MAC2STR(sm->addr));
671 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
672 bitfield_clear(sm->wpa_auth->ip_pool,
673 WPA_GET_BE32(sm->ip_addr) - start);
674 }
675 #endif /* CONFIG_P2P */
676 if (sm->GUpdateStationKeys) {
677 sm->group->GKeyDoneStations--;
678 sm->GUpdateStationKeys = FALSE;
679 }
680 #ifdef CONFIG_IEEE80211R_AP
681 os_free(sm->assoc_resp_ftie);
682 wpabuf_free(sm->ft_pending_req_ies);
683 #endif /* CONFIG_IEEE80211R_AP */
684 os_free(sm->last_rx_eapol_key);
685 os_free(sm->wpa_ie);
686 wpa_group_put(sm->wpa_auth, sm->group);
687 os_free(sm);
688 }
689
690
691 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
692 {
693 if (sm == NULL)
694 return;
695
696 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
697 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
698 "strict rekeying - force GTK rekey since STA "
699 "is leaving");
700 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
701 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
702 NULL);
703 }
704
705 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
706 sm->pending_1_of_4_timeout = 0;
707 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
708 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
709 #ifdef CONFIG_IEEE80211R_AP
710 wpa_ft_sta_deinit(sm);
711 #endif /* CONFIG_IEEE80211R_AP */
712 if (sm->in_step_loop) {
713 /* Must not free state machine while wpa_sm_step() is running.
714 * Freeing will be completed in the end of wpa_sm_step(). */
715 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
716 "machine deinit for " MACSTR, MAC2STR(sm->addr));
717 sm->pending_deinit = 1;
718 } else
719 wpa_free_sta_sm(sm);
720 }
721
722
723 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
724 {
725 if (sm == NULL)
726 return;
727
728 sm->PTKRequest = TRUE;
729 sm->PTK_valid = 0;
730 }
731
732
733 static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
734 const u8 *replay_counter)
735 {
736 int i;
737 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
738 if (!ctr[i].valid)
739 break;
740 if (os_memcmp(replay_counter, ctr[i].counter,
741 WPA_REPLAY_COUNTER_LEN) == 0)
742 return 1;
743 }
744 return 0;
745 }
746
747
748 static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
749 const u8 *replay_counter)
750 {
751 int i;
752 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
753 if (ctr[i].valid &&
754 (replay_counter == NULL ||
755 os_memcmp(replay_counter, ctr[i].counter,
756 WPA_REPLAY_COUNTER_LEN) == 0))
757 ctr[i].valid = FALSE;
758 }
759 }
760
761
762 #ifdef CONFIG_IEEE80211R_AP
763 static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
764 struct wpa_state_machine *sm,
765 struct wpa_eapol_ie_parse *kde)
766 {
767 struct wpa_ie_data ie;
768 struct rsn_mdie *mdie;
769
770 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
771 ie.num_pmkid != 1 || ie.pmkid == NULL) {
772 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
773 "FT 4-way handshake message 2/4");
774 return -1;
775 }
776
777 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
778 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
779 sm->sup_pmk_r1_name, PMKID_LEN);
780
781 if (!kde->mdie || !kde->ftie) {
782 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
783 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
784 return -1;
785 }
786
787 mdie = (struct rsn_mdie *) (kde->mdie + 2);
788 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
789 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
790 MOBILITY_DOMAIN_ID_LEN) != 0) {
791 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
792 return -1;
793 }
794
795 if (sm->assoc_resp_ftie &&
796 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
797 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
798 2 + sm->assoc_resp_ftie[1]) != 0)) {
799 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
800 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
801 kde->ftie, kde->ftie_len);
802 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
803 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
804 return -1;
805 }
806
807 return 0;
808 }
809 #endif /* CONFIG_IEEE80211R_AP */
810
811
812 static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
813 struct wpa_state_machine *sm, int group)
814 {
815 /* Supplicant reported a Michael MIC error */
816 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
817 "received EAPOL-Key Error Request "
818 "(STA detected Michael MIC failure (group=%d))",
819 group);
820
821 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
822 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
823 "ignore Michael MIC failure report since "
824 "group cipher is not TKIP");
825 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
826 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
827 "ignore Michael MIC failure report since "
828 "pairwise cipher is not TKIP");
829 } else {
830 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
831 return 1; /* STA entry was removed */
832 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
833 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
834 }
835
836 /*
837 * Error report is not a request for a new key handshake, but since
838 * Authenticator may do it, let's change the keys now anyway.
839 */
840 wpa_request_new_ptk(sm);
841 return 0;
842 }
843
844
845 static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
846 size_t data_len)
847 {
848 struct wpa_ptk PTK;
849 int ok = 0;
850 const u8 *pmk = NULL;
851 size_t pmk_len;
852
853 os_memset(&PTK, 0, sizeof(PTK));
854 for (;;) {
855 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
856 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
857 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
858 sm->p2p_dev_addr, pmk, &pmk_len);
859 if (pmk == NULL)
860 break;
861 } else {
862 pmk = sm->PMK;
863 pmk_len = sm->pmk_len;
864 }
865
866 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
867 break;
868
869 if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
870 data, data_len) == 0) {
871 ok = 1;
872 break;
873 }
874
875 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
876 break;
877 }
878
879 if (!ok) {
880 wpa_printf(MSG_DEBUG,
881 "WPA: Earlier SNonce did not result in matching MIC");
882 return -1;
883 }
884
885 wpa_printf(MSG_DEBUG,
886 "WPA: Earlier SNonce resulted in matching MIC");
887 sm->alt_snonce_valid = 0;
888 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
889 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
890 sm->PTK_valid = TRUE;
891
892 return 0;
893 }
894
895
896 void wpa_receive(struct wpa_authenticator *wpa_auth,
897 struct wpa_state_machine *sm,
898 u8 *data, size_t data_len)
899 {
900 struct ieee802_1x_hdr *hdr;
901 struct wpa_eapol_key *key;
902 u16 key_info, key_data_length;
903 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
904 SMK_M1, SMK_M3, SMK_ERROR } msg;
905 char *msgtxt;
906 struct wpa_eapol_ie_parse kde;
907 const u8 *key_data;
908 size_t keyhdrlen, mic_len;
909 u8 *mic;
910
911 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
912 return;
913 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
914
915 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
916 keyhdrlen = sizeof(*key) + mic_len + 2;
917
918 if (data_len < sizeof(*hdr) + keyhdrlen) {
919 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
920 return;
921 }
922
923 hdr = (struct ieee802_1x_hdr *) data;
924 key = (struct wpa_eapol_key *) (hdr + 1);
925 mic = (u8 *) (key + 1);
926 key_info = WPA_GET_BE16(key->key_info);
927 key_data = mic + mic_len + 2;
928 key_data_length = WPA_GET_BE16(mic + mic_len);
929 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
930 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
931 MAC2STR(sm->addr), key_info, key->type,
932 (unsigned int) mic_len, key_data_length);
933 wpa_hexdump(MSG_MSGDUMP,
934 "WPA: EAPOL-Key header (ending before Key MIC)",
935 key, sizeof(*key));
936 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
937 mic, mic_len);
938 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
939 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
940 "key_data overflow (%d > %lu)",
941 key_data_length,
942 (unsigned long) (data_len - sizeof(*hdr) -
943 keyhdrlen));
944 return;
945 }
946
947 if (sm->wpa == WPA_VERSION_WPA2) {
948 if (key->type == EAPOL_KEY_TYPE_WPA) {
949 /*
950 * Some deployed station implementations seem to send
951 * msg 4/4 with incorrect type value in WPA2 mode.
952 */
953 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
954 "with unexpected WPA type in RSN mode");
955 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
956 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
957 "unexpected type %d in RSN mode",
958 key->type);
959 return;
960 }
961 } else {
962 if (key->type != EAPOL_KEY_TYPE_WPA) {
963 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
964 "unexpected type %d in WPA mode",
965 key->type);
966 return;
967 }
968 }
969
970 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
971 WPA_NONCE_LEN);
972 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
973 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
974
975 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
976 * are set */
977
978 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
979 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
980 if (key_info & WPA_KEY_INFO_ERROR) {
981 msg = SMK_ERROR;
982 msgtxt = "SMK Error";
983 } else {
984 msg = SMK_M1;
985 msgtxt = "SMK M1";
986 }
987 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
988 msg = SMK_M3;
989 msgtxt = "SMK M3";
990 } else if (key_info & WPA_KEY_INFO_REQUEST) {
991 msg = REQUEST;
992 msgtxt = "Request";
993 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
994 msg = GROUP_2;
995 msgtxt = "2/2 Group";
996 } else if (key_data_length == 0 ||
997 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
998 key_data_length == AES_BLOCK_SIZE)) {
999 msg = PAIRWISE_4;
1000 msgtxt = "4/4 Pairwise";
1001 } else {
1002 msg = PAIRWISE_2;
1003 msgtxt = "2/4 Pairwise";
1004 }
1005
1006 /* TODO: key_info type validation for PeerKey */
1007 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1008 msg == GROUP_2) {
1009 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1010 if (sm->pairwise == WPA_CIPHER_CCMP ||
1011 sm->pairwise == WPA_CIPHER_GCMP) {
1012 if (wpa_use_aes_cmac(sm) &&
1013 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
1014 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
1015 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1016 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1017 wpa_auth_logger(wpa_auth, sm->addr,
1018 LOGGER_WARNING,
1019 "advertised support for "
1020 "AES-128-CMAC, but did not "
1021 "use it");
1022 return;
1023 }
1024
1025 if (!wpa_use_aes_cmac(sm) &&
1026 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
1027 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1028 sm->wpa_key_mgmt != WPA_KEY_MGMT_OWE &&
1029 sm->wpa_key_mgmt != WPA_KEY_MGMT_DPP &&
1030 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1031 wpa_auth_logger(wpa_auth, sm->addr,
1032 LOGGER_WARNING,
1033 "did not use HMAC-SHA1-AES "
1034 "with CCMP/GCMP");
1035 return;
1036 }
1037 }
1038
1039 if ((wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1040 wpa_key_mgmt_fils(sm->wpa_key_mgmt) ||
1041 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
1042 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) &&
1043 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1044 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1045 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1046 return;
1047 }
1048 }
1049
1050 if (key_info & WPA_KEY_INFO_REQUEST) {
1051 if (sm->req_replay_counter_used &&
1052 os_memcmp(key->replay_counter, sm->req_replay_counter,
1053 WPA_REPLAY_COUNTER_LEN) <= 0) {
1054 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1055 "received EAPOL-Key request with "
1056 "replayed counter");
1057 return;
1058 }
1059 }
1060
1061 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
1062 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
1063 int i;
1064
1065 if (msg == PAIRWISE_2 &&
1066 wpa_replay_counter_valid(sm->prev_key_replay,
1067 key->replay_counter) &&
1068 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1069 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1070 {
1071 /*
1072 * Some supplicant implementations (e.g., Windows XP
1073 * WZC) update SNonce for each EAPOL-Key 2/4. This
1074 * breaks the workaround on accepting any of the
1075 * pending requests, so allow the SNonce to be updated
1076 * even if we have already sent out EAPOL-Key 3/4.
1077 */
1078 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1079 "Process SNonce update from STA "
1080 "based on retransmitted EAPOL-Key "
1081 "1/4");
1082 sm->update_snonce = 1;
1083 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1084 sm->alt_snonce_valid = TRUE;
1085 os_memcpy(sm->alt_replay_counter,
1086 sm->key_replay[0].counter,
1087 WPA_REPLAY_COUNTER_LEN);
1088 goto continue_processing;
1089 }
1090
1091 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1092 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1093 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1094 WPA_REPLAY_COUNTER_LEN) == 0) {
1095 /*
1096 * Supplicant may still be using the old SNonce since
1097 * there was two EAPOL-Key 2/4 messages and they had
1098 * different SNonce values.
1099 */
1100 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1101 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
1102 goto continue_processing;
1103 }
1104
1105 if (msg == PAIRWISE_2 &&
1106 wpa_replay_counter_valid(sm->prev_key_replay,
1107 key->replay_counter) &&
1108 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1109 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1110 "ignore retransmitted EAPOL-Key %s - "
1111 "SNonce did not change", msgtxt);
1112 } else {
1113 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1114 "received EAPOL-Key %s with "
1115 "unexpected replay counter", msgtxt);
1116 }
1117 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1118 if (!sm->key_replay[i].valid)
1119 break;
1120 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1121 sm->key_replay[i].counter,
1122 WPA_REPLAY_COUNTER_LEN);
1123 }
1124 wpa_hexdump(MSG_DEBUG, "received replay counter",
1125 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1126 return;
1127 }
1128
1129 continue_processing:
1130 #ifdef CONFIG_FILS
1131 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1132 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1133 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1134 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1135 return;
1136 }
1137 #endif /* CONFIG_FILS */
1138
1139 switch (msg) {
1140 case PAIRWISE_2:
1141 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
1142 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1143 (!sm->update_snonce ||
1144 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
1145 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1146 "received EAPOL-Key msg 2/4 in "
1147 "invalid state (%d) - dropped",
1148 sm->wpa_ptk_state);
1149 return;
1150 }
1151 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
1152 if (sm->group->reject_4way_hs_for_entropy) {
1153 /*
1154 * The system did not have enough entropy to generate
1155 * strong random numbers. Reject the first 4-way
1156 * handshake(s) and collect some entropy based on the
1157 * information from it. Once enough entropy is
1158 * available, the next atempt will trigger GMK/Key
1159 * Counter update and the station will be allowed to
1160 * continue.
1161 */
1162 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1163 "collect more entropy for random number "
1164 "generation");
1165 random_mark_pool_ready();
1166 wpa_sta_disconnect(wpa_auth, sm->addr,
1167 WLAN_REASON_PREV_AUTH_NOT_VALID);
1168 return;
1169 }
1170 break;
1171 case PAIRWISE_4:
1172 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1173 !sm->PTK_valid) {
1174 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1175 "received EAPOL-Key msg 4/4 in "
1176 "invalid state (%d) - dropped",
1177 sm->wpa_ptk_state);
1178 return;
1179 }
1180 break;
1181 case GROUP_2:
1182 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1183 || !sm->PTK_valid) {
1184 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1185 "received EAPOL-Key msg 2/2 in "
1186 "invalid state (%d) - dropped",
1187 sm->wpa_ptk_group_state);
1188 return;
1189 }
1190 break;
1191 #ifdef CONFIG_PEERKEY
1192 case SMK_M1:
1193 case SMK_M3:
1194 case SMK_ERROR:
1195 if (!wpa_auth->conf.peerkey) {
1196 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1197 "PeerKey use disabled - ignoring message");
1198 return;
1199 }
1200 if (!sm->PTK_valid) {
1201 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1202 "received EAPOL-Key msg SMK in "
1203 "invalid state - dropped");
1204 return;
1205 }
1206 break;
1207 #else /* CONFIG_PEERKEY */
1208 case SMK_M1:
1209 case SMK_M3:
1210 case SMK_ERROR:
1211 return; /* STSL disabled - ignore SMK messages */
1212 #endif /* CONFIG_PEERKEY */
1213 case REQUEST:
1214 break;
1215 }
1216
1217 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1218 "received EAPOL-Key frame (%s)", msgtxt);
1219
1220 if (key_info & WPA_KEY_INFO_ACK) {
1221 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1222 "received invalid EAPOL-Key: Key Ack set");
1223 return;
1224 }
1225
1226 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1227 !(key_info & WPA_KEY_INFO_MIC)) {
1228 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1229 "received invalid EAPOL-Key: Key MIC not set");
1230 return;
1231 }
1232
1233 #ifdef CONFIG_FILS
1234 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1235 (key_info & WPA_KEY_INFO_MIC)) {
1236 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1237 "received invalid EAPOL-Key: Key MIC set");
1238 return;
1239 }
1240 #endif /* CONFIG_FILS */
1241
1242 sm->MICVerified = FALSE;
1243 if (sm->PTK_valid && !sm->update_snonce) {
1244 if (mic_len &&
1245 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1246 data, data_len) &&
1247 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1248 wpa_try_alt_snonce(sm, data, data_len))) {
1249 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1250 "received EAPOL-Key with invalid MIC");
1251 return;
1252 }
1253 #ifdef CONFIG_FILS
1254 if (!mic_len &&
1255 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1256 &key_data_length) < 0) {
1257 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1258 "received EAPOL-Key with invalid MIC");
1259 return;
1260 }
1261 #endif /* CONFIG_FILS */
1262 sm->MICVerified = TRUE;
1263 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
1264 sm->pending_1_of_4_timeout = 0;
1265 }
1266
1267 if (key_info & WPA_KEY_INFO_REQUEST) {
1268 if (sm->MICVerified) {
1269 sm->req_replay_counter_used = 1;
1270 os_memcpy(sm->req_replay_counter, key->replay_counter,
1271 WPA_REPLAY_COUNTER_LEN);
1272 } else {
1273 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1274 "received EAPOL-Key request with "
1275 "invalid MIC");
1276 return;
1277 }
1278
1279 /*
1280 * TODO: should decrypt key data field if encryption was used;
1281 * even though MAC address KDE is not normally encrypted,
1282 * supplicant is allowed to encrypt it.
1283 */
1284 if (msg == SMK_ERROR) {
1285 #ifdef CONFIG_PEERKEY
1286 wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
1287 #endif /* CONFIG_PEERKEY */
1288 return;
1289 } else if (key_info & WPA_KEY_INFO_ERROR) {
1290 if (wpa_receive_error_report(
1291 wpa_auth, sm,
1292 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1293 return; /* STA entry was removed */
1294 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1295 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1296 "received EAPOL-Key Request for new "
1297 "4-Way Handshake");
1298 wpa_request_new_ptk(sm);
1299 #ifdef CONFIG_PEERKEY
1300 } else if (msg == SMK_M1) {
1301 wpa_smk_m1(wpa_auth, sm, key, key_data,
1302 key_data_length);
1303 #endif /* CONFIG_PEERKEY */
1304 } else if (key_data_length > 0 &&
1305 wpa_parse_kde_ies(key_data, key_data_length,
1306 &kde) == 0 &&
1307 kde.mac_addr) {
1308 } else {
1309 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1310 "received EAPOL-Key Request for GTK "
1311 "rekeying");
1312 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1313 wpa_rekey_gtk(wpa_auth, NULL);
1314 }
1315 } else {
1316 /* Do not allow the same key replay counter to be reused. */
1317 wpa_replay_counter_mark_invalid(sm->key_replay,
1318 key->replay_counter);
1319
1320 if (msg == PAIRWISE_2) {
1321 /*
1322 * Maintain a copy of the pending EAPOL-Key frames in
1323 * case the EAPOL-Key frame was retransmitted. This is
1324 * needed to allow EAPOL-Key msg 2/4 reply to another
1325 * pending msg 1/4 to update the SNonce to work around
1326 * unexpected supplicant behavior.
1327 */
1328 os_memcpy(sm->prev_key_replay, sm->key_replay,
1329 sizeof(sm->key_replay));
1330 } else {
1331 os_memset(sm->prev_key_replay, 0,
1332 sizeof(sm->prev_key_replay));
1333 }
1334
1335 /*
1336 * Make sure old valid counters are not accepted anymore and
1337 * do not get copied again.
1338 */
1339 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
1340 }
1341
1342 #ifdef CONFIG_PEERKEY
1343 if (msg == SMK_M3) {
1344 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
1345 return;
1346 }
1347 #endif /* CONFIG_PEERKEY */
1348
1349 os_free(sm->last_rx_eapol_key);
1350 sm->last_rx_eapol_key = os_memdup(data, data_len);
1351 if (sm->last_rx_eapol_key == NULL)
1352 return;
1353 sm->last_rx_eapol_key_len = data_len;
1354
1355 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
1356 sm->EAPOLKeyReceived = TRUE;
1357 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1358 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1359 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1360 wpa_sm_step(sm);
1361 }
1362
1363
1364 static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1365 const u8 *gnonce, u8 *gtk, size_t gtk_len)
1366 {
1367 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1368 u8 *pos;
1369 int ret = 0;
1370
1371 /* GTK = PRF-X(GMK, "Group key expansion",
1372 * AA || GNonce || Time || random data)
1373 * The example described in the IEEE 802.11 standard uses only AA and
1374 * GNonce as inputs here. Add some more entropy since this derivation
1375 * is done only at the Authenticator and as such, does not need to be
1376 * exactly same.
1377 */
1378 os_memcpy(data, addr, ETH_ALEN);
1379 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1380 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1381 wpa_get_ntp_timestamp(pos);
1382 pos += 8;
1383 if (random_get_bytes(pos, 16) < 0)
1384 ret = -1;
1385
1386 #ifdef CONFIG_IEEE80211W
1387 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
1388 #else /* CONFIG_IEEE80211W */
1389 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1390 < 0)
1391 ret = -1;
1392 #endif /* CONFIG_IEEE80211W */
1393
1394 return ret;
1395 }
1396
1397
1398 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1399 {
1400 struct wpa_authenticator *wpa_auth = eloop_ctx;
1401 struct wpa_state_machine *sm = timeout_ctx;
1402
1403 sm->pending_1_of_4_timeout = 0;
1404 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1405 sm->TimeoutEvt = TRUE;
1406 wpa_sm_step(sm);
1407 }
1408
1409
1410 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1411 struct wpa_state_machine *sm, int key_info,
1412 const u8 *key_rsc, const u8 *nonce,
1413 const u8 *kde, size_t kde_len,
1414 int keyidx, int encr, int force_version)
1415 {
1416 struct ieee802_1x_hdr *hdr;
1417 struct wpa_eapol_key *key;
1418 size_t len, mic_len, keyhdrlen;
1419 int alg;
1420 int key_data_len, pad_len = 0;
1421 u8 *buf, *pos;
1422 int version, pairwise;
1423 int i;
1424 u8 *key_mic, *key_data;
1425
1426 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
1427 keyhdrlen = sizeof(*key) + mic_len + 2;
1428
1429 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
1430
1431 if (force_version)
1432 version = force_version;
1433 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1434 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
1435 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
1436 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1437 wpa_key_mgmt_fils(sm->wpa_key_mgmt))
1438 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
1439 else if (wpa_use_aes_cmac(sm))
1440 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1441 else if (sm->pairwise != WPA_CIPHER_TKIP)
1442 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1443 else
1444 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1445
1446 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1447
1448 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1449 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1450 "encr=%d)",
1451 version,
1452 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1453 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1454 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1455 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1456 pairwise, (unsigned long) kde_len, keyidx, encr);
1457
1458 key_data_len = kde_len;
1459
1460 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1461 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
1462 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
1463 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1464 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1465 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1466 pad_len = key_data_len % 8;
1467 if (pad_len)
1468 pad_len = 8 - pad_len;
1469 key_data_len += pad_len + 8;
1470 }
1471
1472 len += key_data_len;
1473 if (!mic_len && encr)
1474 len += AES_BLOCK_SIZE;
1475
1476 hdr = os_zalloc(len);
1477 if (hdr == NULL)
1478 return;
1479 hdr->version = wpa_auth->conf.eapol_version;
1480 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1481 hdr->length = host_to_be16(len - sizeof(*hdr));
1482 key = (struct wpa_eapol_key *) (hdr + 1);
1483 key_mic = (u8 *) (key + 1);
1484 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
1485
1486 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1487 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1488 key_info |= version;
1489 if (encr && sm->wpa == WPA_VERSION_WPA2)
1490 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1491 if (sm->wpa != WPA_VERSION_WPA2)
1492 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1493 WPA_PUT_BE16(key->key_info, key_info);
1494
1495 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1496 if ((key_info & WPA_KEY_INFO_SMK_MESSAGE) ||
1497 (sm->wpa == WPA_VERSION_WPA2 && !pairwise))
1498 WPA_PUT_BE16(key->key_length, 0);
1499 else
1500 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
1501
1502 /* FIX: STSL: what to use as key_replay_counter? */
1503 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1504 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1505 os_memcpy(sm->key_replay[i].counter,
1506 sm->key_replay[i - 1].counter,
1507 WPA_REPLAY_COUNTER_LEN);
1508 }
1509 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1510 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1511 WPA_REPLAY_COUNTER_LEN);
1512 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1513 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1514 sm->key_replay[0].valid = TRUE;
1515
1516 if (nonce)
1517 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1518
1519 if (key_rsc)
1520 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1521
1522 if (kde && !encr) {
1523 os_memcpy(key_data, kde, kde_len);
1524 WPA_PUT_BE16(key_mic + mic_len, kde_len);
1525 #ifdef CONFIG_FILS
1526 } else if (!mic_len) {
1527 const u8 *aad[1];
1528 size_t aad_len[1];
1529
1530 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1531 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1532 kde, kde_len);
1533
1534 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1535 sm->PTK.kek, sm->PTK.kek_len);
1536 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1537 * to Key Data (exclusive). */
1538 aad[0] = (u8 *) hdr;
1539 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1540 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1541 1, aad, aad_len, key_mic + 2) < 0) {
1542 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1543 return;
1544 }
1545
1546 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1547 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1548 #endif /* CONFIG_FILS */
1549 } else if (encr && kde) {
1550 buf = os_zalloc(key_data_len);
1551 if (buf == NULL) {
1552 os_free(hdr);
1553 return;
1554 }
1555 pos = buf;
1556 os_memcpy(pos, kde, kde_len);
1557 pos += kde_len;
1558
1559 if (pad_len)
1560 *pos++ = 0xdd;
1561
1562 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1563 buf, key_data_len);
1564 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1565 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
1566 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
1567 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1568 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1569 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1570 wpa_printf(MSG_DEBUG,
1571 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1572 (unsigned int) sm->PTK.kek_len);
1573 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
1574 (key_data_len - 8) / 8, buf, key_data)) {
1575 os_free(hdr);
1576 os_free(buf);
1577 return;
1578 }
1579 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
1580 #ifndef CONFIG_NO_RC4
1581 } else if (sm->PTK.kek_len == 16) {
1582 u8 ek[32];
1583
1584 wpa_printf(MSG_DEBUG,
1585 "WPA: Encrypt Key Data using RC4");
1586 os_memcpy(key->key_iv,
1587 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1588 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1589 os_memcpy(ek, key->key_iv, 16);
1590 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
1591 os_memcpy(key_data, buf, key_data_len);
1592 rc4_skip(ek, 32, 256, key_data, key_data_len);
1593 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
1594 #endif /* CONFIG_NO_RC4 */
1595 } else {
1596 os_free(hdr);
1597 os_free(buf);
1598 return;
1599 }
1600 os_free(buf);
1601 }
1602
1603 if (key_info & WPA_KEY_INFO_MIC) {
1604 if (!sm->PTK_valid || !mic_len) {
1605 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1606 "PTK not valid when sending EAPOL-Key "
1607 "frame");
1608 os_free(hdr);
1609 return;
1610 }
1611
1612 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1613 sm->wpa_key_mgmt, version,
1614 (u8 *) hdr, len, key_mic);
1615 #ifdef CONFIG_TESTING_OPTIONS
1616 if (!pairwise &&
1617 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
1618 drand48() <
1619 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1620 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1621 "Corrupting group EAPOL-Key Key MIC");
1622 key_mic[0]++;
1623 }
1624 #endif /* CONFIG_TESTING_OPTIONS */
1625 }
1626
1627 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1628 1);
1629 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1630 sm->pairwise_set);
1631 os_free(hdr);
1632 }
1633
1634
1635 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1636 struct wpa_state_machine *sm, int key_info,
1637 const u8 *key_rsc, const u8 *nonce,
1638 const u8 *kde, size_t kde_len,
1639 int keyidx, int encr)
1640 {
1641 int timeout_ms;
1642 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1643 u32 ctr;
1644
1645 if (sm == NULL)
1646 return;
1647
1648 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1649 keyidx, encr, 0);
1650
1651 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1652 if (ctr == 1 && wpa_auth->conf.tx_status)
1653 timeout_ms = pairwise ? eapol_key_timeout_first :
1654 eapol_key_timeout_first_group;
1655 else
1656 timeout_ms = eapol_key_timeout_subseq;
1657 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1658 sm->pending_1_of_4_timeout = 1;
1659 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1660 "counter %u)", timeout_ms, ctr);
1661 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1662 wpa_send_eapol_timeout, wpa_auth, sm);
1663 }
1664
1665
1666 static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1667 u8 *data, size_t data_len)
1668 {
1669 struct ieee802_1x_hdr *hdr;
1670 struct wpa_eapol_key *key;
1671 u16 key_info;
1672 int ret = 0;
1673 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
1674 size_t mic_len = wpa_mic_len(akmp, pmk_len);
1675
1676 if (data_len < sizeof(*hdr) + sizeof(*key))
1677 return -1;
1678
1679 hdr = (struct ieee802_1x_hdr *) data;
1680 key = (struct wpa_eapol_key *) (hdr + 1);
1681 mic_pos = (u8 *) (key + 1);
1682 key_info = WPA_GET_BE16(key->key_info);
1683 os_memcpy(mic, mic_pos, mic_len);
1684 os_memset(mic_pos, 0, mic_len);
1685 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1686 key_info & WPA_KEY_INFO_TYPE_MASK,
1687 data, data_len, mic_pos) ||
1688 os_memcmp_const(mic, mic_pos, mic_len) != 0)
1689 ret = -1;
1690 os_memcpy(mic_pos, mic, mic_len);
1691 return ret;
1692 }
1693
1694
1695 void wpa_remove_ptk(struct wpa_state_machine *sm)
1696 {
1697 sm->PTK_valid = FALSE;
1698 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1699 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1700 0))
1701 wpa_printf(MSG_DEBUG,
1702 "RSN: PTK removal from the driver failed");
1703 sm->pairwise_set = FALSE;
1704 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1705 }
1706
1707
1708 int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
1709 {
1710 int remove_ptk = 1;
1711
1712 if (sm == NULL)
1713 return -1;
1714
1715 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1716 "event %d notification", event);
1717
1718 switch (event) {
1719 case WPA_AUTH:
1720 #ifdef CONFIG_MESH
1721 /* PTKs are derived through AMPE */
1722 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1723 /* not mesh */
1724 break;
1725 }
1726 return 0;
1727 #endif /* CONFIG_MESH */
1728 case WPA_ASSOC:
1729 break;
1730 case WPA_DEAUTH:
1731 case WPA_DISASSOC:
1732 sm->DeauthenticationRequest = TRUE;
1733 break;
1734 case WPA_REAUTH:
1735 case WPA_REAUTH_EAPOL:
1736 if (!sm->started) {
1737 /*
1738 * When using WPS, we may end up here if the STA
1739 * manages to re-associate without the previous STA
1740 * entry getting removed. Consequently, we need to make
1741 * sure that the WPA state machines gets initialized
1742 * properly at this point.
1743 */
1744 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1745 "started - initialize now");
1746 sm->started = 1;
1747 sm->Init = TRUE;
1748 if (wpa_sm_step(sm) == 1)
1749 return 1; /* should not really happen */
1750 sm->Init = FALSE;
1751 sm->AuthenticationRequest = TRUE;
1752 break;
1753 }
1754 if (sm->GUpdateStationKeys) {
1755 /*
1756 * Reauthentication cancels the pending group key
1757 * update for this STA.
1758 */
1759 sm->group->GKeyDoneStations--;
1760 sm->GUpdateStationKeys = FALSE;
1761 sm->PtkGroupInit = TRUE;
1762 }
1763 sm->ReAuthenticationRequest = TRUE;
1764 break;
1765 case WPA_ASSOC_FT:
1766 #ifdef CONFIG_IEEE80211R_AP
1767 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1768 "after association");
1769 wpa_ft_install_ptk(sm);
1770
1771 /* Using FT protocol, not WPA auth state machine */
1772 sm->ft_completed = 1;
1773 return 0;
1774 #else /* CONFIG_IEEE80211R_AP */
1775 break;
1776 #endif /* CONFIG_IEEE80211R_AP */
1777 case WPA_ASSOC_FILS:
1778 #ifdef CONFIG_FILS
1779 wpa_printf(MSG_DEBUG,
1780 "FILS: TK configuration after association");
1781 fils_set_tk(sm);
1782 sm->fils_completed = 1;
1783 return 0;
1784 #else /* CONFIG_FILS */
1785 break;
1786 #endif /* CONFIG_FILS */
1787 case WPA_DRV_STA_REMOVED:
1788 sm->tk_already_set = FALSE;
1789 return 0;
1790 }
1791
1792 #ifdef CONFIG_IEEE80211R_AP
1793 sm->ft_completed = 0;
1794 #endif /* CONFIG_IEEE80211R_AP */
1795
1796 #ifdef CONFIG_IEEE80211W
1797 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1798 remove_ptk = 0;
1799 #endif /* CONFIG_IEEE80211W */
1800 #ifdef CONFIG_FILS
1801 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1802 (event == WPA_AUTH || event == WPA_ASSOC))
1803 remove_ptk = 0;
1804 #endif /* CONFIG_FILS */
1805
1806 if (remove_ptk) {
1807 sm->PTK_valid = FALSE;
1808 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1809
1810 if (event != WPA_REAUTH_EAPOL)
1811 wpa_remove_ptk(sm);
1812 }
1813
1814 if (sm->in_step_loop) {
1815 /*
1816 * wpa_sm_step() is already running - avoid recursive call to
1817 * it by making the existing loop process the new update.
1818 */
1819 sm->changed = TRUE;
1820 return 0;
1821 }
1822 return wpa_sm_step(sm);
1823 }
1824
1825
1826 SM_STATE(WPA_PTK, INITIALIZE)
1827 {
1828 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1829 if (sm->Init) {
1830 /* Init flag is not cleared here, so avoid busy
1831 * loop by claiming nothing changed. */
1832 sm->changed = FALSE;
1833 }
1834
1835 sm->keycount = 0;
1836 if (sm->GUpdateStationKeys)
1837 sm->group->GKeyDoneStations--;
1838 sm->GUpdateStationKeys = FALSE;
1839 if (sm->wpa == WPA_VERSION_WPA)
1840 sm->PInitAKeys = FALSE;
1841 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1842 * Local AA > Remote AA)) */) {
1843 sm->Pair = TRUE;
1844 }
1845 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1846 wpa_remove_ptk(sm);
1847 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1848 sm->TimeoutCtr = 0;
1849 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
1850 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
1851 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
1852 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1853 WPA_EAPOL_authorized, 0);
1854 }
1855 }
1856
1857
1858 SM_STATE(WPA_PTK, DISCONNECT)
1859 {
1860 u16 reason = sm->disconnect_reason;
1861
1862 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1863 sm->Disconnect = FALSE;
1864 sm->disconnect_reason = 0;
1865 if (!reason)
1866 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1867 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
1868 }
1869
1870
1871 SM_STATE(WPA_PTK, DISCONNECTED)
1872 {
1873 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1874 sm->DeauthenticationRequest = FALSE;
1875 }
1876
1877
1878 SM_STATE(WPA_PTK, AUTHENTICATION)
1879 {
1880 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1881 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1882 sm->PTK_valid = FALSE;
1883 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1884 1);
1885 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1886 sm->AuthenticationRequest = FALSE;
1887 }
1888
1889
1890 static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1891 struct wpa_group *group)
1892 {
1893 if (group->first_sta_seen)
1894 return;
1895 /*
1896 * System has run bit further than at the time hostapd was started
1897 * potentially very early during boot up. This provides better chances
1898 * of collecting more randomness on embedded systems. Re-initialize the
1899 * GMK and Counter here to improve their strength if there was not
1900 * enough entropy available immediately after system startup.
1901 */
1902 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1903 "station");
1904 if (random_pool_ready() != 1) {
1905 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1906 "to proceed - reject first 4-way handshake");
1907 group->reject_4way_hs_for_entropy = TRUE;
1908 } else {
1909 group->first_sta_seen = TRUE;
1910 group->reject_4way_hs_for_entropy = FALSE;
1911 }
1912
1913 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1914 wpa_gtk_update(wpa_auth, group) < 0 ||
1915 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1916 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1917 group->first_sta_seen = FALSE;
1918 group->reject_4way_hs_for_entropy = TRUE;
1919 }
1920 }
1921
1922
1923 SM_STATE(WPA_PTK, AUTHENTICATION2)
1924 {
1925 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1926
1927 wpa_group_ensure_init(sm->wpa_auth, sm->group);
1928 sm->ReAuthenticationRequest = FALSE;
1929
1930 /*
1931 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1932 * ambiguous. The Authenticator state machine uses a counter that is
1933 * incremented by one for each 4-way handshake. However, the security
1934 * analysis of 4-way handshake points out that unpredictable nonces
1935 * help in preventing precomputation attacks. Instead of the state
1936 * machine definition, use an unpredictable nonce value here to provide
1937 * stronger protection against potential precomputation attacks.
1938 */
1939 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1940 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1941 "ANonce.");
1942 sm->Disconnect = TRUE;
1943 return;
1944 }
1945 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1946 WPA_NONCE_LEN);
1947 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1948 * logical place than INITIALIZE since AUTHENTICATION2 can be
1949 * re-entered on ReAuthenticationRequest without going through
1950 * INITIALIZE. */
1951 sm->TimeoutCtr = 0;
1952 }
1953
1954
1955 SM_STATE(WPA_PTK, INITPMK)
1956 {
1957 u8 msk[2 * PMK_LEN];
1958 size_t len = 2 * PMK_LEN;
1959
1960 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1961 #ifdef CONFIG_IEEE80211R_AP
1962 sm->xxkey_len = 0;
1963 #endif /* CONFIG_IEEE80211R_AP */
1964 if (sm->pmksa) {
1965 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1966 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1967 sm->pmk_len = sm->pmksa->pmk_len;
1968 #ifdef CONFIG_DPP
1969 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
1970 wpa_printf(MSG_DEBUG,
1971 "DPP: No PMKSA cache entry for STA - reject connection");
1972 sm->Disconnect = TRUE;
1973 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
1974 return;
1975 #endif /* CONFIG_DPP */
1976 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1977 unsigned int pmk_len;
1978
1979 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
1980 pmk_len = PMK_LEN_SUITE_B_192;
1981 else
1982 pmk_len = PMK_LEN;
1983 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1984 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1985 pmk_len);
1986 if (len < pmk_len) {
1987 wpa_printf(MSG_DEBUG,
1988 "WPA: MSK not long enough (%u) to create PMK (%u)",
1989 (unsigned int) len, (unsigned int) pmk_len);
1990 sm->Disconnect = TRUE;
1991 return;
1992 }
1993 os_memcpy(sm->PMK, msk, pmk_len);
1994 sm->pmk_len = pmk_len;
1995 #ifdef CONFIG_IEEE80211R_AP
1996 if (len >= 2 * PMK_LEN) {
1997 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1998 sm->xxkey_len = PMK_LEN;
1999 }
2000 #endif /* CONFIG_IEEE80211R_AP */
2001 } else {
2002 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
2003 sm->wpa_auth->cb->get_msk);
2004 sm->Disconnect = TRUE;
2005 return;
2006 }
2007 os_memset(msk, 0, sizeof(msk));
2008
2009 sm->req_replay_counter_used = 0;
2010 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
2011 * will break reauthentication since EAPOL state machines may not be
2012 * get into AUTHENTICATING state that clears keyRun before WPA state
2013 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
2014 * state and takes PMK from the previously used AAA Key. This will
2015 * eventually fail in 4-Way Handshake because Supplicant uses PMK
2016 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
2017 * be good workaround for this issue. */
2018 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
2019 }
2020
2021
2022 SM_STATE(WPA_PTK, INITPSK)
2023 {
2024 const u8 *psk;
2025 size_t psk_len;
2026
2027 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
2028 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
2029 &psk_len);
2030 if (psk) {
2031 os_memcpy(sm->PMK, psk, psk_len);
2032 sm->pmk_len = psk_len;
2033 #ifdef CONFIG_IEEE80211R_AP
2034 os_memcpy(sm->xxkey, psk, PMK_LEN);
2035 sm->xxkey_len = PMK_LEN;
2036 #endif /* CONFIG_IEEE80211R_AP */
2037 }
2038 #ifdef CONFIG_SAE
2039 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2040 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2041 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2042 sm->pmk_len = sm->pmksa->pmk_len;
2043 }
2044 #endif /* CONFIG_SAE */
2045 sm->req_replay_counter_used = 0;
2046 }
2047
2048
2049 SM_STATE(WPA_PTK, PTKSTART)
2050 {
2051 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2052 size_t pmkid_len = 0;
2053
2054 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2055 sm->PTKRequest = FALSE;
2056 sm->TimeoutEvt = FALSE;
2057 sm->alt_snonce_valid = FALSE;
2058
2059 sm->TimeoutCtr++;
2060 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
2061 /* No point in sending the EAPOL-Key - we will disconnect
2062 * immediately following this. */
2063 return;
2064 }
2065
2066 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2067 "sending 1/4 msg of 4-Way Handshake");
2068 /*
2069 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
2070 * one possible PSK for this STA.
2071 */
2072 if (sm->wpa == WPA_VERSION_WPA2 &&
2073 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
2074 (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
2075 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
2076 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
2077 pmkid = buf;
2078 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2079 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2080 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2081 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
2082 if (sm->pmksa) {
2083 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2084 sm->pmksa->pmkid, PMKID_LEN);
2085 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2086 /* No KCK available to derive PMKID */
2087 pmkid = NULL;
2088 } else {
2089 /*
2090 * Calculate PMKID since no PMKSA cache entry was
2091 * available with pre-calculated PMKID.
2092 */
2093 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
2094 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2095 sm->wpa_key_mgmt);
2096 }
2097 }
2098 wpa_send_eapol(sm->wpa_auth, sm,
2099 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2100 sm->ANonce, pmkid, pmkid_len, 0, 0);
2101 }
2102
2103
2104 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
2105 const u8 *pmk, unsigned int pmk_len,
2106 struct wpa_ptk *ptk)
2107 {
2108 #ifdef CONFIG_IEEE80211R_AP
2109 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
2110 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
2111 #endif /* CONFIG_IEEE80211R_AP */
2112
2113 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
2114 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2115 ptk, sm->wpa_key_mgmt, sm->pairwise);
2116 }
2117
2118
2119 #ifdef CONFIG_FILS
2120
2121 int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
2122 size_t pmk_len, const u8 *snonce, const u8 *anonce,
2123 const u8 *dhss, size_t dhss_len,
2124 struct wpabuf *g_sta, struct wpabuf *g_ap)
2125 {
2126 u8 ick[FILS_ICK_MAX_LEN];
2127 size_t ick_len;
2128 int res;
2129 u8 fils_ft[FILS_FT_MAX_LEN];
2130 size_t fils_ft_len = 0;
2131
2132 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
2133 snonce, anonce, dhss, dhss_len,
2134 &sm->PTK, ick, &ick_len,
2135 sm->wpa_key_mgmt, sm->pairwise,
2136 fils_ft, &fils_ft_len);
2137 if (res < 0)
2138 return res;
2139 sm->PTK_valid = TRUE;
2140
2141 #ifdef CONFIG_IEEE80211R_AP
2142 if (fils_ft_len) {
2143 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2144 struct wpa_auth_config *conf = &wpa_auth->conf;
2145 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
2146
2147 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2148 conf->ssid, conf->ssid_len,
2149 conf->mobility_domain,
2150 conf->r0_key_holder,
2151 conf->r0_key_holder_len,
2152 sm->addr, pmk_r0, pmk_r0_name) < 0)
2153 return -1;
2154
2155 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", pmk_r0, PMK_LEN);
2156 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2157 pmk_r0_name, WPA_PMK_NAME_LEN);
2158 wpa_ft_store_pmk_r0(wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
2159 sm->pairwise);
2160 os_memset(fils_ft, 0, sizeof(fils_ft));
2161 }
2162 #endif /* CONFIG_IEEE80211R_AP */
2163
2164 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2165 sm->addr, sm->wpa_auth->addr,
2166 g_sta ? wpabuf_head(g_sta) : NULL,
2167 g_sta ? wpabuf_len(g_sta) : 0,
2168 g_ap ? wpabuf_head(g_ap) : NULL,
2169 g_ap ? wpabuf_len(g_ap) : 0,
2170 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2171 sm->fils_key_auth_ap,
2172 &sm->fils_key_auth_len);
2173 os_memset(ick, 0, sizeof(ick));
2174
2175 /* Store nonces for (Re)Association Request/Response frame processing */
2176 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2177 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2178
2179 return res;
2180 }
2181
2182
2183 static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
2184 u8 *buf, size_t buf_len, u16 *_key_data_len)
2185 {
2186 struct ieee802_1x_hdr *hdr;
2187 struct wpa_eapol_key *key;
2188 u8 *pos;
2189 u16 key_data_len;
2190 u8 *tmp;
2191 const u8 *aad[1];
2192 size_t aad_len[1];
2193
2194 hdr = (struct ieee802_1x_hdr *) buf;
2195 key = (struct wpa_eapol_key *) (hdr + 1);
2196 pos = (u8 *) (key + 1);
2197 key_data_len = WPA_GET_BE16(pos);
2198 if (key_data_len < AES_BLOCK_SIZE ||
2199 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2200 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2201 "No room for AES-SIV data in the frame");
2202 return -1;
2203 }
2204 pos += 2; /* Pointing at the Encrypted Key Data field */
2205
2206 tmp = os_malloc(key_data_len);
2207 if (!tmp)
2208 return -1;
2209
2210 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2211 * to Key Data (exclusive). */
2212 aad[0] = buf;
2213 aad_len[0] = pos - buf;
2214 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2215 1, aad, aad_len, tmp) < 0) {
2216 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2217 "Invalid AES-SIV data in the frame");
2218 bin_clear_free(tmp, key_data_len);
2219 return -1;
2220 }
2221
2222 /* AEAD decryption and validation completed successfully */
2223 key_data_len -= AES_BLOCK_SIZE;
2224 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2225 tmp, key_data_len);
2226
2227 /* Replace Key Data field with the decrypted version */
2228 os_memcpy(pos, tmp, key_data_len);
2229 pos -= 2; /* Key Data Length field */
2230 WPA_PUT_BE16(pos, key_data_len);
2231 bin_clear_free(tmp, key_data_len);
2232 if (_key_data_len)
2233 *_key_data_len = key_data_len;
2234 return 0;
2235 }
2236
2237
2238 const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2239 const u8 *ies, size_t ies_len,
2240 const u8 *fils_session)
2241 {
2242 const u8 *ie, *end;
2243 const u8 *session = NULL;
2244
2245 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2246 wpa_printf(MSG_DEBUG,
2247 "FILS: Not a FILS AKM - reject association");
2248 return NULL;
2249 }
2250
2251 /* Verify Session element */
2252 ie = ies;
2253 end = ((const u8 *) ie) + ies_len;
2254 while (ie + 1 < end) {
2255 if (ie + 2 + ie[1] > end)
2256 break;
2257 if (ie[0] == WLAN_EID_EXTENSION &&
2258 ie[1] >= 1 + FILS_SESSION_LEN &&
2259 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2260 session = ie;
2261 break;
2262 }
2263 ie += 2 + ie[1];
2264 }
2265
2266 if (!session) {
2267 wpa_printf(MSG_DEBUG,
2268 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2269 __func__);
2270 return NULL;
2271 }
2272
2273 if (!fils_session) {
2274 wpa_printf(MSG_DEBUG,
2275 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2276 __func__);
2277 return NULL;
2278 }
2279
2280 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2281 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2282 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2283 fils_session, FILS_SESSION_LEN);
2284 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2285 session + 3, FILS_SESSION_LEN);
2286 return NULL;
2287 }
2288 return session;
2289 }
2290
2291
2292 int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2293 size_t ies_len)
2294 {
2295 struct ieee802_11_elems elems;
2296
2297 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2298 wpa_printf(MSG_DEBUG,
2299 "FILS: Failed to parse decrypted elements");
2300 return -1;
2301 }
2302
2303 if (!elems.fils_session) {
2304 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2305 return -1;
2306 }
2307
2308 if (!elems.fils_key_confirm) {
2309 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2310 return -1;
2311 }
2312
2313 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2314 wpa_printf(MSG_DEBUG,
2315 "FILS: Unexpected Key-Auth length %d (expected %d)",
2316 elems.fils_key_confirm_len,
2317 (int) sm->fils_key_auth_len);
2318 return -1;
2319 }
2320
2321 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2322 sm->fils_key_auth_len) != 0) {
2323 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2324 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2325 elems.fils_key_confirm, elems.fils_key_confirm_len);
2326 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2327 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2328 return -1;
2329 }
2330
2331 return 0;
2332 }
2333
2334
2335 int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2336 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2337 u8 *pos, size_t left)
2338 {
2339 u16 fc, stype;
2340 const u8 *end, *ie_start, *ie, *session, *crypt;
2341 const u8 *aad[5];
2342 size_t aad_len[5];
2343
2344 if (!sm || !sm->PTK_valid) {
2345 wpa_printf(MSG_DEBUG,
2346 "FILS: No KEK to decrypt Assocication Request frame");
2347 return -1;
2348 }
2349
2350 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2351 wpa_printf(MSG_DEBUG,
2352 "FILS: Not a FILS AKM - reject association");
2353 return -1;
2354 }
2355
2356 end = ((const u8 *) mgmt) + frame_len;
2357 fc = le_to_host16(mgmt->frame_control);
2358 stype = WLAN_FC_GET_STYPE(fc);
2359 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2360 ie_start = mgmt->u.reassoc_req.variable;
2361 else
2362 ie_start = mgmt->u.assoc_req.variable;
2363 ie = ie_start;
2364
2365 /*
2366 * Find FILS Session element which is the last unencrypted element in
2367 * the frame.
2368 */
2369 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2370 fils_session);
2371 if (!session) {
2372 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
2373 return -1;
2374 }
2375
2376 crypt = session + 2 + session[1];
2377
2378 if (end - crypt < AES_BLOCK_SIZE) {
2379 wpa_printf(MSG_DEBUG,
2380 "FILS: Too short frame to include AES-SIV data");
2381 return -1;
2382 }
2383
2384 /* AES-SIV AAD vectors */
2385
2386 /* The STA's MAC address */
2387 aad[0] = mgmt->sa;
2388 aad_len[0] = ETH_ALEN;
2389 /* The AP's BSSID */
2390 aad[1] = mgmt->da;
2391 aad_len[1] = ETH_ALEN;
2392 /* The STA's nonce */
2393 aad[2] = sm->SNonce;
2394 aad_len[2] = FILS_NONCE_LEN;
2395 /* The AP's nonce */
2396 aad[3] = sm->ANonce;
2397 aad_len[3] = FILS_NONCE_LEN;
2398 /*
2399 * The (Re)Association Request frame from the Capability Information
2400 * field to the FILS Session element (both inclusive).
2401 */
2402 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
2403 aad_len[4] = crypt - aad[4];
2404
2405 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
2406 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
2407 wpa_printf(MSG_DEBUG,
2408 "FILS: Invalid AES-SIV data in the frame");
2409 return -1;
2410 }
2411 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2412 pos, left - AES_BLOCK_SIZE);
2413
2414 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2415 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
2416 return -1;
2417 }
2418
2419 return left - AES_BLOCK_SIZE;
2420 }
2421
2422
2423 int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
2424 size_t current_len, size_t max_len,
2425 const struct wpabuf *hlp)
2426 {
2427 u8 *end = buf + max_len;
2428 u8 *pos = buf + current_len;
2429 struct ieee80211_mgmt *mgmt;
2430 struct wpabuf *plain;
2431 const u8 *aad[5];
2432 size_t aad_len[5];
2433
2434 if (!sm || !sm->PTK_valid)
2435 return -1;
2436
2437 wpa_hexdump(MSG_DEBUG,
2438 "FILS: Association Response frame before FILS processing",
2439 buf, current_len);
2440
2441 mgmt = (struct ieee80211_mgmt *) buf;
2442
2443 /* AES-SIV AAD vectors */
2444
2445 /* The AP's BSSID */
2446 aad[0] = mgmt->sa;
2447 aad_len[0] = ETH_ALEN;
2448 /* The STA's MAC address */
2449 aad[1] = mgmt->da;
2450 aad_len[1] = ETH_ALEN;
2451 /* The AP's nonce */
2452 aad[2] = sm->ANonce;
2453 aad_len[2] = FILS_NONCE_LEN;
2454 /* The STA's nonce */
2455 aad[3] = sm->SNonce;
2456 aad_len[3] = FILS_NONCE_LEN;
2457 /*
2458 * The (Re)Association Response frame from the Capability Information
2459 * field (the same offset in both Association and Reassociation
2460 * Response frames) to the FILS Session element (both inclusive).
2461 */
2462 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2463 aad_len[4] = pos - aad[4];
2464
2465 /* The following elements will be encrypted with AES-SIV */
2466 plain = fils_prepare_plainbuf(sm, hlp);
2467 if (!plain) {
2468 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2469 return -1;
2470 }
2471
2472 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2473 wpa_printf(MSG_DEBUG,
2474 "FILS: Not enough room for FILS elements");
2475 wpabuf_free(plain);
2476 return -1;
2477 }
2478
2479 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2480 plain);
2481
2482 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2483 wpabuf_head(plain), wpabuf_len(plain),
2484 5, aad, aad_len, pos) < 0) {
2485 wpabuf_free(plain);
2486 return -1;
2487 }
2488
2489 wpa_hexdump(MSG_DEBUG,
2490 "FILS: Encrypted Association Response elements",
2491 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2492 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2493 wpabuf_free(plain);
2494
2495 sm->fils_completed = 1;
2496
2497 return current_len;
2498 }
2499
2500
2501 static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2502 const struct wpabuf *hlp)
2503 {
2504 struct wpabuf *plain;
2505 u8 *len, *tmp, *tmp2;
2506 u8 hdr[2];
2507 u8 *gtk, dummy_gtk[32];
2508 size_t gtk_len;
2509 struct wpa_group *gsm;
2510
2511 plain = wpabuf_alloc(1000);
2512 if (!plain)
2513 return NULL;
2514
2515 /* TODO: FILS Public Key */
2516
2517 /* FILS Key Confirmation */
2518 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2519 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2520 /* Element ID Extension */
2521 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2522 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2523
2524 /* FILS HLP Container */
2525 if (hlp)
2526 wpabuf_put_buf(plain, hlp);
2527
2528 /* TODO: FILS IP Address Assignment */
2529
2530 /* Key Delivery */
2531 gsm = sm->group;
2532 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2533 len = wpabuf_put(plain, 1);
2534 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2535 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2536 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2537 /* GTK KDE */
2538 gtk = gsm->GTK[gsm->GN - 1];
2539 gtk_len = gsm->GTK_len;
2540 if (sm->wpa_auth->conf.disable_gtk) {
2541 /*
2542 * Provide unique random GTK to each STA to prevent use
2543 * of GTK in the BSS.
2544 */
2545 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2546 wpabuf_free(plain);
2547 return NULL;
2548 }
2549 gtk = dummy_gtk;
2550 }
2551 hdr[0] = gsm->GN & 0x03;
2552 hdr[1] = 0;
2553 tmp = wpabuf_put(plain, 0);
2554 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2555 gtk, gtk_len);
2556 wpabuf_put(plain, tmp2 - tmp);
2557
2558 /* IGTK KDE */
2559 tmp = wpabuf_put(plain, 0);
2560 tmp2 = ieee80211w_kde_add(sm, tmp);
2561 wpabuf_put(plain, tmp2 - tmp);
2562
2563 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
2564 return plain;
2565 }
2566
2567
2568 int fils_set_tk(struct wpa_state_machine *sm)
2569 {
2570 enum wpa_alg alg;
2571 int klen;
2572
2573 if (!sm || !sm->PTK_valid)
2574 return -1;
2575
2576 alg = wpa_cipher_to_alg(sm->pairwise);
2577 klen = wpa_cipher_key_len(sm->pairwise);
2578
2579 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2580 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2581 sm->PTK.tk, klen)) {
2582 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2583 return -1;
2584 }
2585
2586 return 0;
2587 }
2588
2589
2590 u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
2591 const u8 *fils_session, struct wpabuf *hlp)
2592 {
2593 struct wpabuf *plain;
2594 u8 *pos = buf;
2595
2596 /* FILS Session */
2597 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2598 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2599 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2600 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2601 pos += FILS_SESSION_LEN;
2602
2603 plain = fils_prepare_plainbuf(sm, hlp);
2604 if (!plain) {
2605 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2606 return NULL;
2607 }
2608
2609 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2610 pos += wpabuf_len(plain);
2611
2612 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2613 (unsigned int) wpabuf_len(plain));
2614 wpabuf_free(plain);
2615 sm->fils_completed = 1;
2616 return pos;
2617 }
2618
2619 #endif /* CONFIG_FILS */
2620
2621
2622 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2623 {
2624 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2625 struct wpa_ptk PTK;
2626 int ok = 0, psk_found = 0;
2627 const u8 *pmk = NULL;
2628 size_t pmk_len;
2629 int ft;
2630 const u8 *eapol_key_ie, *key_data, *mic;
2631 u16 key_data_length;
2632 size_t mic_len, eapol_key_ie_len;
2633 struct ieee802_1x_hdr *hdr;
2634 struct wpa_eapol_key *key;
2635 struct wpa_eapol_ie_parse kde;
2636
2637 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2638 sm->EAPOLKeyReceived = FALSE;
2639 sm->update_snonce = FALSE;
2640 os_memset(&PTK, 0, sizeof(PTK));
2641
2642 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
2643
2644 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2645 * WPA-PSK: iterate through possible PSKs and select the one matching
2646 * the packet */
2647 for (;;) {
2648 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2649 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2650 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2651 sm->p2p_dev_addr, pmk, &pmk_len);
2652 if (pmk == NULL)
2653 break;
2654 psk_found = 1;
2655 } else {
2656 pmk = sm->PMK;
2657 pmk_len = sm->pmk_len;
2658 }
2659
2660 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2661 break;
2662
2663 if (mic_len &&
2664 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
2665 sm->last_rx_eapol_key,
2666 sm->last_rx_eapol_key_len) == 0) {
2667 ok = 1;
2668 break;
2669 }
2670
2671 #ifdef CONFIG_FILS
2672 if (!mic_len &&
2673 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2674 sm->last_rx_eapol_key_len, NULL) == 0) {
2675 ok = 1;
2676 break;
2677 }
2678 #endif /* CONFIG_FILS */
2679
2680 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
2681 break;
2682 }
2683
2684 if (!ok) {
2685 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2686 "invalid MIC in msg 2/4 of 4-Way Handshake");
2687 if (psk_found)
2688 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
2689 return;
2690 }
2691
2692 /*
2693 * Note: last_rx_eapol_key length fields have already been validated in
2694 * wpa_receive().
2695 */
2696 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2697 key = (struct wpa_eapol_key *) (hdr + 1);
2698 mic = (u8 *) (key + 1);
2699 key_data = mic + mic_len + 2;
2700 key_data_length = WPA_GET_BE16(mic + mic_len);
2701 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2702 sizeof(*key) - mic_len - 2)
2703 return;
2704
2705 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2706 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2707 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2708 return;
2709 }
2710 if (kde.rsn_ie) {
2711 eapol_key_ie = kde.rsn_ie;
2712 eapol_key_ie_len = kde.rsn_ie_len;
2713 } else if (kde.osen) {
2714 eapol_key_ie = kde.osen;
2715 eapol_key_ie_len = kde.osen_len;
2716 } else {
2717 eapol_key_ie = kde.wpa_ie;
2718 eapol_key_ie_len = kde.wpa_ie_len;
2719 }
2720 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2721 if (sm->wpa_ie == NULL ||
2722 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2723 eapol_key_ie, eapol_key_ie_len)) {
2724 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2725 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2726 if (sm->wpa_ie) {
2727 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2728 sm->wpa_ie, sm->wpa_ie_len);
2729 }
2730 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2731 eapol_key_ie, eapol_key_ie_len);
2732 /* MLME-DEAUTHENTICATE.request */
2733 wpa_sta_disconnect(wpa_auth, sm->addr,
2734 WLAN_REASON_PREV_AUTH_NOT_VALID);
2735 return;
2736 }
2737 #ifdef CONFIG_IEEE80211R_AP
2738 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
2739 wpa_sta_disconnect(wpa_auth, sm->addr,
2740 WLAN_REASON_PREV_AUTH_NOT_VALID);
2741 return;
2742 }
2743 #endif /* CONFIG_IEEE80211R_AP */
2744 #ifdef CONFIG_P2P
2745 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2746 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2747 int idx;
2748 wpa_printf(MSG_DEBUG,
2749 "P2P: IP address requested in EAPOL-Key exchange");
2750 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2751 if (idx >= 0) {
2752 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2753 bitfield_set(wpa_auth->ip_pool, idx);
2754 WPA_PUT_BE32(sm->ip_addr, start + idx);
2755 wpa_printf(MSG_DEBUG,
2756 "P2P: Assigned IP address %u.%u.%u.%u to "
2757 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2758 sm->ip_addr[2], sm->ip_addr[3],
2759 MAC2STR(sm->addr));
2760 }
2761 }
2762 #endif /* CONFIG_P2P */
2763
2764 #ifdef CONFIG_IEEE80211R_AP
2765 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2766 /*
2767 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2768 * with the value we derived.
2769 */
2770 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2771 WPA_PMK_NAME_LEN) != 0) {
2772 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2773 "PMKR1Name mismatch in FT 4-way "
2774 "handshake");
2775 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2776 "Supplicant",
2777 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2778 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2779 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2780 return;
2781 }
2782 }
2783 #endif /* CONFIG_IEEE80211R_AP */
2784
2785 sm->pending_1_of_4_timeout = 0;
2786 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2787
2788 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2789 /* PSK may have changed from the previous choice, so update
2790 * state machine data based on whatever PSK was selected here.
2791 */
2792 os_memcpy(sm->PMK, pmk, PMK_LEN);
2793 sm->pmk_len = PMK_LEN;
2794 }
2795
2796 sm->MICVerified = TRUE;
2797
2798 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2799 sm->PTK_valid = TRUE;
2800 }
2801
2802
2803 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2804 {
2805 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2806 sm->TimeoutCtr = 0;
2807 }
2808
2809
2810 #ifdef CONFIG_IEEE80211W
2811
2812 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2813 {
2814 if (sm->mgmt_frame_prot) {
2815 size_t len;
2816 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2817 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
2818 }
2819
2820 return 0;
2821 }
2822
2823
2824 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2825 {
2826 struct wpa_igtk_kde igtk;
2827 struct wpa_group *gsm = sm->group;
2828 u8 rsc[WPA_KEY_RSC_LEN];
2829 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2830
2831 if (!sm->mgmt_frame_prot)
2832 return pos;
2833
2834 igtk.keyid[0] = gsm->GN_igtk;
2835 igtk.keyid[1] = 0;
2836 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
2837 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
2838 os_memset(igtk.pn, 0, sizeof(igtk.pn));
2839 else
2840 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
2841 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
2842 if (sm->wpa_auth->conf.disable_gtk) {
2843 /*
2844 * Provide unique random IGTK to each STA to prevent use of
2845 * IGTK in the BSS.
2846 */
2847 if (random_get_bytes(igtk.igtk, len) < 0)
2848 return pos;
2849 }
2850 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
2851 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2852 NULL, 0);
2853
2854 return pos;
2855 }
2856
2857 #else /* CONFIG_IEEE80211W */
2858
2859 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2860 {
2861 return 0;
2862 }
2863
2864
2865 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2866 {
2867 return pos;
2868 }
2869
2870 #endif /* CONFIG_IEEE80211W */
2871
2872
2873 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2874 {
2875 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
2876 size_t gtk_len, kde_len;
2877 struct wpa_group *gsm = sm->group;
2878 u8 *wpa_ie;
2879 int wpa_ie_len, secure, keyidx, encr = 0;
2880
2881 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2882 sm->TimeoutEvt = FALSE;
2883
2884 sm->TimeoutCtr++;
2885 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
2886 /* No point in sending the EAPOL-Key - we will disconnect
2887 * immediately following this. */
2888 return;
2889 }
2890
2891 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2892 GTK[GN], IGTK, [FTIE], [TIE * 2])
2893 */
2894 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2895 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2896 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
2897 wpa_ie = sm->wpa_auth->wpa_ie;
2898 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2899 if (sm->wpa == WPA_VERSION_WPA &&
2900 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2901 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
2902 /* WPA-only STA, remove RSN IE and possible MDIE */
2903 wpa_ie = wpa_ie + wpa_ie[1] + 2;
2904 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2905 wpa_ie = wpa_ie + wpa_ie[1] + 2;
2906 wpa_ie_len = wpa_ie[1] + 2;
2907 }
2908 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2909 "sending 3/4 msg of 4-Way Handshake");
2910 if (sm->wpa == WPA_VERSION_WPA2) {
2911 /* WPA2 send GTK in the 4-way handshake */
2912 secure = 1;
2913 gtk = gsm->GTK[gsm->GN - 1];
2914 gtk_len = gsm->GTK_len;
2915 if (sm->wpa_auth->conf.disable_gtk) {
2916 /*
2917 * Provide unique random GTK to each STA to prevent use
2918 * of GTK in the BSS.
2919 */
2920 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2921 return;
2922 gtk = dummy_gtk;
2923 }
2924 keyidx = gsm->GN;
2925 _rsc = rsc;
2926 encr = 1;
2927 } else {
2928 /* WPA does not include GTK in msg 3/4 */
2929 secure = 0;
2930 gtk = NULL;
2931 gtk_len = 0;
2932 keyidx = 0;
2933 _rsc = NULL;
2934 if (sm->rx_eapol_key_secure) {
2935 /*
2936 * It looks like Windows 7 supplicant tries to use
2937 * Secure bit in msg 2/4 after having reported Michael
2938 * MIC failure and it then rejects the 4-way handshake
2939 * if msg 3/4 does not set Secure bit. Work around this
2940 * by setting the Secure bit here even in the case of
2941 * WPA if the supplicant used it first.
2942 */
2943 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2944 "STA used Secure bit in WPA msg 2/4 - "
2945 "set Secure for 3/4 as workaround");
2946 secure = 1;
2947 }
2948 }
2949
2950 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2951 if (gtk)
2952 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
2953 #ifdef CONFIG_IEEE80211R_AP
2954 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2955 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2956 kde_len += 300; /* FTIE + 2 * TIE */
2957 }
2958 #endif /* CONFIG_IEEE80211R_AP */
2959 #ifdef CONFIG_P2P
2960 if (WPA_GET_BE32(sm->ip_addr) > 0)
2961 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2962 #endif /* CONFIG_P2P */
2963 kde = os_malloc(kde_len);
2964 if (kde == NULL)
2965 return;
2966
2967 pos = kde;
2968 os_memcpy(pos, wpa_ie, wpa_ie_len);
2969 pos += wpa_ie_len;
2970 #ifdef CONFIG_IEEE80211R_AP
2971 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2972 int res;
2973 size_t elen;
2974
2975 elen = pos - kde;
2976 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
2977 if (res < 0) {
2978 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2979 "PMKR1Name into RSN IE in EAPOL-Key data");
2980 os_free(kde);
2981 return;
2982 }
2983 pos -= wpa_ie_len;
2984 pos += elen;
2985 }
2986 #endif /* CONFIG_IEEE80211R_AP */
2987 if (gtk) {
2988 u8 hdr[2];
2989 hdr[0] = keyidx & 0x03;
2990 hdr[1] = 0;
2991 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2992 gtk, gtk_len);
2993 }
2994 pos = ieee80211w_kde_add(sm, pos);
2995
2996 #ifdef CONFIG_IEEE80211R_AP
2997 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2998 int res;
2999 struct wpa_auth_config *conf;
3000
3001 conf = &sm->wpa_auth->conf;
3002 if (sm->assoc_resp_ftie &&
3003 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
3004 os_memcpy(pos, sm->assoc_resp_ftie,
3005 2 + sm->assoc_resp_ftie[1]);
3006 res = 2 + sm->assoc_resp_ftie[1];
3007 } else {
3008 res = wpa_write_ftie(conf, conf->r0_key_holder,
3009 conf->r0_key_holder_len,
3010 NULL, NULL, pos,
3011 kde + kde_len - pos,
3012 NULL, 0);
3013 }
3014 if (res < 0) {
3015 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3016 "into EAPOL-Key Key Data");
3017 os_free(kde);
3018 return;
3019 }
3020 pos += res;
3021
3022 /* TIE[ReassociationDeadline] (TU) */
3023 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3024 *pos++ = 5;
3025 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3026 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3027 pos += 4;
3028
3029 /* TIE[KeyLifetime] (seconds) */
3030 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3031 *pos++ = 5;
3032 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
3033 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
3034 pos += 4;
3035 }
3036 #endif /* CONFIG_IEEE80211R_AP */
3037 #ifdef CONFIG_P2P
3038 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3039 u8 addr[3 * 4];
3040 os_memcpy(addr, sm->ip_addr, 4);
3041 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3042 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3043 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3044 addr, sizeof(addr), NULL, 0);
3045 }
3046 #endif /* CONFIG_P2P */
3047
3048 wpa_send_eapol(sm->wpa_auth, sm,
3049 (secure ? WPA_KEY_INFO_SECURE : 0) |
3050 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3051 WPA_KEY_INFO_MIC : 0) |
3052 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3053 WPA_KEY_INFO_KEY_TYPE,
3054 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3055 os_free(kde);
3056 }
3057
3058
3059 SM_STATE(WPA_PTK, PTKINITDONE)
3060 {
3061 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3062 sm->EAPOLKeyReceived = FALSE;
3063 if (sm->Pair) {
3064 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3065 int klen = wpa_cipher_key_len(sm->pairwise);
3066 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
3067 sm->PTK.tk, klen)) {
3068 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3069 WLAN_REASON_PREV_AUTH_NOT_VALID);
3070 return;
3071 }
3072 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3073 sm->pairwise_set = TRUE;
3074
3075 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
3076 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3077 eloop_register_timeout(sm->wpa_auth->conf.
3078 wpa_ptk_rekey, 0, wpa_rekey_ptk,
3079 sm->wpa_auth, sm);
3080 }
3081
3082 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3083 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
3084 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
3085 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3086 WPA_EAPOL_authorized, 1);
3087 }
3088 }
3089
3090 if (0 /* IBSS == TRUE */) {
3091 sm->keycount++;
3092 if (sm->keycount == 2) {
3093 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3094 WPA_EAPOL_portValid, 1);
3095 }
3096 } else {
3097 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3098 1);
3099 }
3100 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3101 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3102 if (sm->wpa == WPA_VERSION_WPA)
3103 sm->PInitAKeys = TRUE;
3104 else
3105 sm->has_GTK = TRUE;
3106 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3107 "pairwise key handshake completed (%s)",
3108 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3109
3110 #ifdef CONFIG_IEEE80211R_AP
3111 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
3112 #endif /* CONFIG_IEEE80211R_AP */
3113 }
3114
3115
3116 SM_STEP(WPA_PTK)
3117 {
3118 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3119
3120 if (sm->Init)
3121 SM_ENTER(WPA_PTK, INITIALIZE);
3122 else if (sm->Disconnect
3123 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3124 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3125 "WPA_PTK: sm->Disconnect");
3126 SM_ENTER(WPA_PTK, DISCONNECT);
3127 }
3128 else if (sm->DeauthenticationRequest)
3129 SM_ENTER(WPA_PTK, DISCONNECTED);
3130 else if (sm->AuthenticationRequest)
3131 SM_ENTER(WPA_PTK, AUTHENTICATION);
3132 else if (sm->ReAuthenticationRequest)
3133 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3134 else if (sm->PTKRequest)
3135 SM_ENTER(WPA_PTK, PTKSTART);
3136 else switch (sm->wpa_ptk_state) {
3137 case WPA_PTK_INITIALIZE:
3138 break;
3139 case WPA_PTK_DISCONNECT:
3140 SM_ENTER(WPA_PTK, DISCONNECTED);
3141 break;
3142 case WPA_PTK_DISCONNECTED:
3143 SM_ENTER(WPA_PTK, INITIALIZE);
3144 break;
3145 case WPA_PTK_AUTHENTICATION:
3146 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3147 break;
3148 case WPA_PTK_AUTHENTICATION2:
3149 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
3150 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3151 WPA_EAPOL_keyRun) > 0)
3152 SM_ENTER(WPA_PTK, INITPMK);
3153 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3154 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
3155 /* FIX: && 802.1X::keyRun */)
3156 SM_ENTER(WPA_PTK, INITPSK);
3157 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3158 SM_ENTER(WPA_PTK, INITPMK);
3159 break;
3160 case WPA_PTK_INITPMK:
3161 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3162 WPA_EAPOL_keyAvailable) > 0) {
3163 SM_ENTER(WPA_PTK, PTKSTART);
3164 #ifdef CONFIG_DPP
3165 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3166 SM_ENTER(WPA_PTK, PTKSTART);
3167 #endif /* CONFIG_DPP */
3168 } else {
3169 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3170 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3171 "INITPMK - keyAvailable = false");
3172 SM_ENTER(WPA_PTK, DISCONNECT);
3173 }
3174 break;
3175 case WPA_PTK_INITPSK:
3176 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
3177 NULL, NULL)) {
3178 SM_ENTER(WPA_PTK, PTKSTART);
3179 #ifdef CONFIG_SAE
3180 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3181 SM_ENTER(WPA_PTK, PTKSTART);
3182 #endif /* CONFIG_SAE */
3183 } else {
3184 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3185 "no PSK configured for the STA");
3186 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3187 SM_ENTER(WPA_PTK, DISCONNECT);
3188 }
3189 break;
3190 case WPA_PTK_PTKSTART:
3191 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3192 sm->EAPOLKeyPairwise)
3193 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3194 else if (sm->TimeoutCtr >
3195 sm->wpa_auth->conf.wpa_pairwise_update_count) {
3196 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3197 wpa_auth_vlogger(
3198 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3199 "PTKSTART: Retry limit %u reached",
3200 sm->wpa_auth->conf.wpa_pairwise_update_count);
3201 SM_ENTER(WPA_PTK, DISCONNECT);
3202 } else if (sm->TimeoutEvt)
3203 SM_ENTER(WPA_PTK, PTKSTART);
3204 break;
3205 case WPA_PTK_PTKCALCNEGOTIATING:
3206 if (sm->MICVerified)
3207 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3208 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3209 sm->EAPOLKeyPairwise)
3210 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3211 else if (sm->TimeoutEvt)
3212 SM_ENTER(WPA_PTK, PTKSTART);
3213 break;
3214 case WPA_PTK_PTKCALCNEGOTIATING2:
3215 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3216 break;
3217 case WPA_PTK_PTKINITNEGOTIATING:
3218 if (sm->update_snonce)
3219 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3220 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3221 sm->EAPOLKeyPairwise && sm->MICVerified)
3222 SM_ENTER(WPA_PTK, PTKINITDONE);
3223 else if (sm->TimeoutCtr >
3224 sm->wpa_auth->conf.wpa_pairwise_update_count) {
3225 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3226 wpa_auth_vlogger(
3227 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3228 "PTKINITNEGOTIATING: Retry limit %u reached",
3229 sm->wpa_auth->conf.wpa_pairwise_update_count);
3230 SM_ENTER(WPA_PTK, DISCONNECT);
3231 } else if (sm->TimeoutEvt)
3232 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3233 break;
3234 case WPA_PTK_PTKINITDONE:
3235 break;
3236 }
3237 }
3238
3239
3240 SM_STATE(WPA_PTK_GROUP, IDLE)
3241 {
3242 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3243 if (sm->Init) {
3244 /* Init flag is not cleared here, so avoid busy
3245 * loop by claiming nothing changed. */
3246 sm->changed = FALSE;
3247 }
3248 sm->GTimeoutCtr = 0;
3249 }
3250
3251
3252 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3253 {
3254 u8 rsc[WPA_KEY_RSC_LEN];
3255 struct wpa_group *gsm = sm->group;
3256 const u8 *kde;
3257 u8 *kde_buf = NULL, *pos, hdr[2];
3258 size_t kde_len;
3259 u8 *gtk, dummy_gtk[32];
3260
3261 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
3262
3263 sm->GTimeoutCtr++;
3264 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
3265 /* No point in sending the EAPOL-Key - we will disconnect
3266 * immediately following this. */
3267 return;
3268 }
3269
3270 if (sm->wpa == WPA_VERSION_WPA)
3271 sm->PInitAKeys = FALSE;
3272 sm->TimeoutEvt = FALSE;
3273 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3274 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3275 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3276 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3277 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3278 "sending 1/2 msg of Group Key Handshake");
3279
3280 gtk = gsm->GTK[gsm->GN - 1];
3281 if (sm->wpa_auth->conf.disable_gtk) {
3282 /*
3283 * Provide unique random GTK to each STA to prevent use
3284 * of GTK in the BSS.
3285 */
3286 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3287 return;
3288 gtk = dummy_gtk;
3289 }
3290 if (sm->wpa == WPA_VERSION_WPA2) {
3291 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3292 ieee80211w_kde_len(sm);
3293 kde_buf = os_malloc(kde_len);
3294 if (kde_buf == NULL)
3295 return;
3296
3297 kde = pos = kde_buf;
3298 hdr[0] = gsm->GN & 0x03;
3299 hdr[1] = 0;
3300 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3301 gtk, gsm->GTK_len);
3302 pos = ieee80211w_kde_add(sm, pos);
3303 kde_len = pos - kde;
3304 } else {
3305 kde = gtk;
3306 kde_len = gsm->GTK_len;
3307 }
3308
3309 wpa_send_eapol(sm->wpa_auth, sm,
3310 WPA_KEY_INFO_SECURE |
3311 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3312 WPA_KEY_INFO_MIC : 0) |
3313 WPA_KEY_INFO_ACK |
3314 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
3315 rsc, NULL, kde, kde_len, gsm->GN, 1);
3316
3317 os_free(kde_buf);
3318 }
3319
3320
3321 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3322 {
3323 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3324 sm->EAPOLKeyReceived = FALSE;
3325 if (sm->GUpdateStationKeys)
3326 sm->group->GKeyDoneStations--;
3327 sm->GUpdateStationKeys = FALSE;
3328 sm->GTimeoutCtr = 0;
3329 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3330 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3331 "group key handshake completed (%s)",
3332 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3333 sm->has_GTK = TRUE;
3334 }
3335
3336
3337 SM_STATE(WPA_PTK_GROUP, KEYERROR)
3338 {
3339 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3340 if (sm->GUpdateStationKeys)
3341 sm->group->GKeyDoneStations--;
3342 sm->GUpdateStationKeys = FALSE;
3343 sm->Disconnect = TRUE;
3344 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3345 "group key handshake failed (%s) after %u tries",
3346 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3347 sm->wpa_auth->conf.wpa_group_update_count);
3348 }
3349
3350
3351 SM_STEP(WPA_PTK_GROUP)
3352 {
3353 if (sm->Init || sm->PtkGroupInit) {
3354 SM_ENTER(WPA_PTK_GROUP, IDLE);
3355 sm->PtkGroupInit = FALSE;
3356 } else switch (sm->wpa_ptk_group_state) {
3357 case WPA_PTK_GROUP_IDLE:
3358 if (sm->GUpdateStationKeys ||
3359 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3360 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3361 break;
3362 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3363 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3364 !sm->EAPOLKeyPairwise && sm->MICVerified)
3365 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3366 else if (sm->GTimeoutCtr >
3367 sm->wpa_auth->conf.wpa_group_update_count)
3368 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3369 else if (sm->TimeoutEvt)
3370 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3371 break;
3372 case WPA_PTK_GROUP_KEYERROR:
3373 SM_ENTER(WPA_PTK_GROUP, IDLE);
3374 break;
3375 case WPA_PTK_GROUP_REKEYESTABLISHED:
3376 SM_ENTER(WPA_PTK_GROUP, IDLE);
3377 break;
3378 }
3379 }
3380
3381
3382 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3383 struct wpa_group *group)
3384 {
3385 int ret = 0;
3386
3387 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3388 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3389 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3390 wpa_auth->addr, group->GNonce,
3391 group->GTK[group->GN - 1], group->GTK_len) < 0)
3392 ret = -1;
3393 wpa_hexdump_key(MSG_DEBUG, "GTK",
3394 group->GTK[group->GN - 1], group->GTK_len);
3395
3396 #ifdef CONFIG_IEEE80211W
3397 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3398 size_t len;
3399 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3400 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3401 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3402 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3403 wpa_auth->addr, group->GNonce,
3404 group->IGTK[group->GN_igtk - 4], len) < 0)
3405 ret = -1;
3406 wpa_hexdump_key(MSG_DEBUG, "IGTK",
3407 group->IGTK[group->GN_igtk - 4], len);
3408 }
3409 #endif /* CONFIG_IEEE80211W */
3410
3411 return ret;
3412 }
3413
3414
3415 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3416 struct wpa_group *group)
3417 {
3418 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3419 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3420 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3421 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3422
3423 /* GTK[0..N] = 0 */
3424 os_memset(group->GTK, 0, sizeof(group->GTK));
3425 group->GN = 1;
3426 group->GM = 2;
3427 #ifdef CONFIG_IEEE80211W
3428 group->GN_igtk = 4;
3429 group->GM_igtk = 5;
3430 #endif /* CONFIG_IEEE80211W */
3431 /* GTK[GN] = CalcGTK() */
3432 wpa_gtk_update(wpa_auth, group);
3433 }
3434
3435
3436 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3437 {
3438 if (ctx != NULL && ctx != sm->group)
3439 return 0;
3440
3441 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3442 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3443 "Not in PTKINITDONE; skip Group Key update");
3444 sm->GUpdateStationKeys = FALSE;
3445 return 0;
3446 }
3447 if (sm->GUpdateStationKeys) {
3448 /*
3449 * This should not really happen, so add a debug log entry.
3450 * Since we clear the GKeyDoneStations before the loop, the
3451 * station needs to be counted here anyway.
3452 */
3453 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3454 "GUpdateStationKeys was already set when "
3455 "marking station for GTK rekeying");
3456 }
3457
3458 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
3459 if (sm->is_wnmsleep)
3460 return 0;
3461
3462 sm->group->GKeyDoneStations++;
3463 sm->GUpdateStationKeys = TRUE;
3464
3465 wpa_sm_step(sm);
3466 return 0;
3467 }
3468
3469
3470 #ifdef CONFIG_WNM_AP
3471 /* update GTK when exiting WNM-Sleep Mode */
3472 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3473 {
3474 if (sm == NULL || sm->is_wnmsleep)
3475 return;
3476
3477 wpa_group_update_sta(sm, NULL);
3478 }
3479
3480
3481 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3482 {
3483 if (sm)
3484 sm->is_wnmsleep = !!flag;
3485 }
3486
3487
3488 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3489 {
3490 struct wpa_group *gsm = sm->group;
3491 u8 *start = pos;
3492
3493 /*
3494 * GTK subelement:
3495 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
3496 * Key[5..32]
3497 */
3498 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3499 *pos++ = 11 + gsm->GTK_len;
3500 /* Key ID in B0-B1 of Key Info */
3501 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3502 pos += 2;
3503 *pos++ = gsm->GTK_len;
3504 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
3505 return 0;
3506 pos += 8;
3507 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3508 pos += gsm->GTK_len;
3509
3510 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3511 gsm->GN);
3512 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
3513 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3514
3515 return pos - start;
3516 }
3517
3518
3519 #ifdef CONFIG_IEEE80211W
3520 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3521 {
3522 struct wpa_group *gsm = sm->group;
3523 u8 *start = pos;
3524 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3525
3526 /*
3527 * IGTK subelement:
3528 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3529 */
3530 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
3531 *pos++ = 2 + 6 + len;
3532 WPA_PUT_LE16(pos, gsm->GN_igtk);
3533 pos += 2;
3534 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
3535 return 0;
3536 pos += 6;
3537
3538 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3539 pos += len;
3540
3541 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3542 gsm->GN_igtk);
3543 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
3544 gsm->IGTK[gsm->GN_igtk - 4], len);
3545
3546 return pos - start;
3547 }
3548 #endif /* CONFIG_IEEE80211W */
3549 #endif /* CONFIG_WNM_AP */
3550
3551
3552 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3553 struct wpa_group *group)
3554 {
3555 int tmp;
3556
3557 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3558 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3559 group->changed = TRUE;
3560 group->wpa_group_state = WPA_GROUP_SETKEYS;
3561 group->GTKReKey = FALSE;
3562 tmp = group->GM;
3563 group->GM = group->GN;
3564 group->GN = tmp;
3565 #ifdef CONFIG_IEEE80211W
3566 tmp = group->GM_igtk;
3567 group->GM_igtk = group->GN_igtk;
3568 group->GN_igtk = tmp;
3569 #endif /* CONFIG_IEEE80211W */
3570 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3571 * counting the STAs that are marked with GUpdateStationKeys instead of
3572 * including all STAs that could be in not-yet-completed state. */
3573 wpa_gtk_update(wpa_auth, group);
3574
3575 if (group->GKeyDoneStations) {
3576 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3577 "GKeyDoneStations=%d when starting new GTK rekey",
3578 group->GKeyDoneStations);
3579 group->GKeyDoneStations = 0;
3580 }
3581 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
3582 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3583 group->GKeyDoneStations);
3584 }
3585
3586
3587 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3588 struct wpa_group *group)
3589 {
3590 int ret = 0;
3591
3592 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
3593 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
3594 broadcast_ether_addr, group->GN,
3595 group->GTK[group->GN - 1], group->GTK_len) < 0)
3596 ret = -1;
3597
3598 #ifdef CONFIG_IEEE80211W
3599 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3600 enum wpa_alg alg;
3601 size_t len;
3602
3603 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3604 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3605
3606 if (ret == 0 &&
3607 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3608 broadcast_ether_addr, group->GN_igtk,
3609 group->IGTK[group->GN_igtk - 4], len) < 0)
3610 ret = -1;
3611 }
3612 #endif /* CONFIG_IEEE80211W */
3613
3614 return ret;
3615 }
3616
3617
3618 static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3619 {
3620 if (sm->group == ctx) {
3621 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3622 " for discconnection due to fatal failure",
3623 MAC2STR(sm->addr));
3624 sm->Disconnect = TRUE;
3625 }
3626
3627 return 0;
3628 }
3629
3630
3631 static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3632 struct wpa_group *group)
3633 {
3634 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3635 group->changed = TRUE;
3636 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3637 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3638 }
3639
3640
3641 static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3642 struct wpa_group *group)
3643 {
3644 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3645 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3646 group->changed = TRUE;
3647 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3648
3649 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3650 wpa_group_fatal_failure(wpa_auth, group);
3651 return -1;
3652 }
3653
3654 return 0;
3655 }
3656
3657
3658 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3659 struct wpa_group *group)
3660 {
3661 if (group->GInit) {
3662 wpa_group_gtk_init(wpa_auth, group);
3663 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3664 /* Do not allow group operations */
3665 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3666 group->GTKAuthenticator) {
3667 wpa_group_setkeysdone(wpa_auth, group);
3668 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3669 group->GTKReKey) {
3670 wpa_group_setkeys(wpa_auth, group);
3671 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3672 if (group->GKeyDoneStations == 0)
3673 wpa_group_setkeysdone(wpa_auth, group);
3674 else if (group->GTKReKey)
3675 wpa_group_setkeys(wpa_auth, group);
3676 }
3677 }
3678
3679
3680 static int wpa_sm_step(struct wpa_state_machine *sm)
3681 {
3682 if (sm == NULL)
3683 return 0;
3684
3685 if (sm->in_step_loop) {
3686 /* This should not happen, but if it does, make sure we do not
3687 * end up freeing the state machine too early by exiting the
3688 * recursive call. */
3689 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
3690 return 0;
3691 }
3692
3693 sm->in_step_loop = 1;
3694 do {
3695 if (sm->pending_deinit)
3696 break;
3697
3698 sm->changed = FALSE;
3699 sm->wpa_auth->group->changed = FALSE;
3700
3701 SM_STEP_RUN(WPA_PTK);
3702 if (sm->pending_deinit)
3703 break;
3704 SM_STEP_RUN(WPA_PTK_GROUP);
3705 if (sm->pending_deinit)
3706 break;
3707 wpa_group_sm_step(sm->wpa_auth, sm->group);
3708 } while (sm->changed || sm->wpa_auth->group->changed);
3709 sm->in_step_loop = 0;
3710
3711 if (sm->pending_deinit) {
3712 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3713 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3714 wpa_free_sta_sm(sm);
3715 return 1;
3716 }
3717 return 0;
3718 }
3719
3720
3721 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3722 {
3723 struct wpa_state_machine *sm = eloop_ctx;
3724 wpa_sm_step(sm);
3725 }
3726
3727
3728 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3729 {
3730 if (sm == NULL)
3731 return;
3732 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3733 }
3734
3735
3736 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3737 {
3738 int tmp, i;
3739 struct wpa_group *group;
3740
3741 if (wpa_auth == NULL)
3742 return;
3743
3744 group = wpa_auth->group;
3745
3746 for (i = 0; i < 2; i++) {
3747 tmp = group->GM;
3748 group->GM = group->GN;
3749 group->GN = tmp;
3750 #ifdef CONFIG_IEEE80211W
3751 tmp = group->GM_igtk;
3752 group->GM_igtk = group->GN_igtk;
3753 group->GN_igtk = tmp;
3754 #endif /* CONFIG_IEEE80211W */
3755 wpa_gtk_update(wpa_auth, group);
3756 wpa_group_config_group_keys(wpa_auth, group);
3757 }
3758 }
3759
3760
3761 static const char * wpa_bool_txt(int val)
3762 {
3763 return val ? "TRUE" : "FALSE";
3764 }
3765
3766
3767 #define RSN_SUITE "%02x-%02x-%02x-%d"
3768 #define RSN_SUITE_ARG(s) \
3769 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3770
3771 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3772 {
3773 int len = 0, ret;
3774 char pmkid_txt[PMKID_LEN * 2 + 1];
3775 #ifdef CONFIG_RSN_PREAUTH
3776 const int preauth = 1;
3777 #else /* CONFIG_RSN_PREAUTH */
3778 const int preauth = 0;
3779 #endif /* CONFIG_RSN_PREAUTH */
3780
3781 if (wpa_auth == NULL)
3782 return len;
3783
3784 ret = os_snprintf(buf + len, buflen - len,
3785 "dot11RSNAOptionImplemented=TRUE\n"
3786 "dot11RSNAPreauthenticationImplemented=%s\n"
3787 "dot11RSNAEnabled=%s\n"
3788 "dot11RSNAPreauthenticationEnabled=%s\n",
3789 wpa_bool_txt(preauth),
3790 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3791 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
3792 if (os_snprintf_error(buflen - len, ret))
3793 return len;
3794 len += ret;
3795
3796 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3797 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3798
3799 ret = os_snprintf(
3800 buf + len, buflen - len,
3801 "dot11RSNAConfigVersion=%u\n"
3802 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3803 /* FIX: dot11RSNAConfigGroupCipher */
3804 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3805 /* FIX: dot11RSNAConfigGroupRekeyTime */
3806 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3807 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3808 "dot11RSNAConfigGroupUpdateCount=%u\n"
3809 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3810 "dot11RSNAConfigGroupCipherSize=%u\n"
3811 "dot11RSNAConfigPMKLifetime=%u\n"
3812 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3813 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3814 "dot11RSNAConfigSATimeout=%u\n"
3815 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3816 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3817 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3818 "dot11RSNAPMKIDUsed=%s\n"
3819 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3820 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3821 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3822 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3823 "dot11RSNA4WayHandshakeFailures=%u\n"
3824 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3825 RSN_VERSION,
3826 !!wpa_auth->conf.wpa_strict_rekey,
3827 wpa_auth->conf.wpa_group_update_count,
3828 wpa_auth->conf.wpa_pairwise_update_count,
3829 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
3830 dot11RSNAConfigPMKLifetime,
3831 dot11RSNAConfigPMKReauthThreshold,
3832 dot11RSNAConfigSATimeout,
3833 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3834 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3835 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3836 pmkid_txt,
3837 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3838 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3839 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3840 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3841 wpa_auth->dot11RSNA4WayHandshakeFailures);
3842 if (os_snprintf_error(buflen - len, ret))
3843 return len;
3844 len += ret;
3845
3846 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3847 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3848
3849 /* Private MIB */
3850 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3851 wpa_auth->group->wpa_group_state);
3852 if (os_snprintf_error(buflen - len, ret))
3853 return len;
3854 len += ret;
3855
3856 return len;
3857 }
3858
3859
3860 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3861 {
3862 int len = 0, ret;
3863 u32 pairwise = 0;
3864
3865 if (sm == NULL)
3866 return 0;
3867
3868 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3869
3870 /* dot11RSNAStatsEntry */
3871
3872 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3873 WPA_PROTO_RSN : WPA_PROTO_WPA,
3874 sm->pairwise);
3875 if (pairwise == 0)
3876 return 0;
3877
3878 ret = os_snprintf(
3879 buf + len, buflen - len,
3880 /* TODO: dot11RSNAStatsIndex */
3881 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3882 "dot11RSNAStatsVersion=1\n"
3883 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3884 /* TODO: dot11RSNAStatsTKIPICVErrors */
3885 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
3886 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
3887 /* TODO: dot11RSNAStatsCCMPReplays */
3888 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3889 /* TODO: dot11RSNAStatsTKIPReplays */,
3890 MAC2STR(sm->addr),
3891 RSN_SUITE_ARG(pairwise),
3892 sm->dot11RSNAStatsTKIPLocalMICFailures,
3893 sm->dot11RSNAStatsTKIPRemoteMICFailures);
3894 if (os_snprintf_error(buflen - len, ret))
3895 return len;
3896 len += ret;
3897
3898 /* Private MIB */
3899 ret = os_snprintf(buf + len, buflen - len,
3900 "hostapdWPAPTKState=%d\n"
3901 "hostapdWPAPTKGroupState=%d\n",
3902 sm->wpa_ptk_state,
3903 sm->wpa_ptk_group_state);
3904 if (os_snprintf_error(buflen - len, ret))
3905 return len;
3906 len += ret;
3907
3908 return len;
3909 }
3910
3911
3912 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3913 {
3914 if (wpa_auth)
3915 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3916 }
3917
3918
3919 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3920 {
3921 return sm && sm->pairwise_set;
3922 }
3923
3924
3925 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3926 {
3927 return sm->pairwise;
3928 }
3929
3930
3931 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3932 {
3933 if (sm == NULL)
3934 return -1;
3935 return sm->wpa_key_mgmt;
3936 }
3937
3938
3939 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3940 {
3941 if (sm == NULL)
3942 return 0;
3943 return sm->wpa;
3944 }
3945
3946
3947 int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
3948 {
3949 if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
3950 return 0;
3951 return sm->tk_already_set;
3952 }
3953
3954
3955 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3956 struct rsn_pmksa_cache_entry *entry)
3957 {
3958 if (sm == NULL || sm->pmksa != entry)
3959 return -1;
3960 sm->pmksa = NULL;
3961 return 0;
3962 }
3963
3964
3965 struct rsn_pmksa_cache_entry *
3966 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3967 {
3968 return sm ? sm->pmksa : NULL;
3969 }
3970
3971
3972 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3973 {
3974 if (sm)
3975 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3976 }
3977
3978
3979 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3980 {
3981 if (wpa_auth == NULL)
3982 return NULL;
3983 *len = wpa_auth->wpa_ie_len;
3984 return wpa_auth->wpa_ie;
3985 }
3986
3987
3988 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
3989 unsigned int pmk_len,
3990 int session_timeout, struct eapol_state_machine *eapol)
3991 {
3992 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3993 sm->wpa_auth->conf.disable_pmksa_caching)
3994 return -1;
3995
3996 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
3997 if (pmk_len > PMK_LEN_SUITE_B_192)
3998 pmk_len = PMK_LEN_SUITE_B_192;
3999 } else if (pmk_len > PMK_LEN) {
4000 pmk_len = PMK_LEN;
4001 }
4002
4003 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
4004 sm->PTK.kck, sm->PTK.kck_len,
4005 sm->wpa_auth->addr, sm->addr, session_timeout,
4006 eapol, sm->wpa_key_mgmt))
4007 return 0;
4008
4009 return -1;
4010 }
4011
4012
4013 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4014 const u8 *pmk, size_t len, const u8 *sta_addr,
4015 int session_timeout,
4016 struct eapol_state_machine *eapol)
4017 {
4018 if (wpa_auth == NULL)
4019 return -1;
4020
4021 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
4022 NULL, 0,
4023 wpa_auth->addr,
4024 sta_addr, session_timeout, eapol,
4025 WPA_KEY_MGMT_IEEE8021X))
4026 return 0;
4027
4028 return -1;
4029 }
4030
4031
4032 int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
4033 const u8 *pmk, const u8 *pmkid)
4034 {
4035 if (wpa_auth->conf.disable_pmksa_caching)
4036 return -1;
4037
4038 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
4039 NULL, 0,
4040 wpa_auth->addr, addr, 0, NULL,
4041 WPA_KEY_MGMT_SAE))
4042 return 0;
4043
4044 return -1;
4045 }
4046
4047
4048 int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4049 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4050 int session_timeout, int akmp)
4051 {
4052 if (wpa_auth->conf.disable_pmksa_caching)
4053 return -1;
4054
4055 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4056 NULL, 0, wpa_auth->addr, addr, session_timeout,
4057 NULL, akmp))
4058 return 0;
4059
4060 return -1;
4061 }
4062
4063
4064 void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4065 const u8 *sta_addr)
4066 {
4067 struct rsn_pmksa_cache_entry *pmksa;
4068
4069 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4070 return;
4071 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4072 if (pmksa) {
4073 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4074 MACSTR " based on request", MAC2STR(sta_addr));
4075 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4076 }
4077 }
4078
4079
4080 int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4081 size_t len)
4082 {
4083 if (!wpa_auth || !wpa_auth->pmksa)
4084 return 0;
4085 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4086 }
4087
4088
4089 void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4090 {
4091 if (wpa_auth && wpa_auth->pmksa)
4092 pmksa_cache_auth_flush(wpa_auth->pmksa);
4093 }
4094
4095
4096 #ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4097 #ifdef CONFIG_MESH
4098
4099 int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4100 char *buf, size_t len)
4101 {
4102 if (!wpa_auth || !wpa_auth->pmksa)
4103 return 0;
4104
4105 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4106 }
4107
4108
4109 struct rsn_pmksa_cache_entry *
4110 wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4111 const u8 *pmkid, int expiration)
4112 {
4113 struct rsn_pmksa_cache_entry *entry;
4114 struct os_reltime now;
4115
4116 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4117 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4118 if (!entry)
4119 return NULL;
4120
4121 os_get_reltime(&now);
4122 entry->expiration = now.sec + expiration;
4123 return entry;
4124 }
4125
4126
4127 int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4128 struct rsn_pmksa_cache_entry *entry)
4129 {
4130 int ret;
4131
4132 if (!wpa_auth || !wpa_auth->pmksa)
4133 return -1;
4134
4135 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4136 if (ret < 0)
4137 wpa_printf(MSG_DEBUG,
4138 "RSN: Failed to store external PMKSA cache for "
4139 MACSTR, MAC2STR(entry->spa));
4140
4141 return ret;
4142 }
4143
4144 #endif /* CONFIG_MESH */
4145 #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4146
4147
4148 struct rsn_pmksa_cache_entry *
4149 wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4150 const u8 *pmkid)
4151 {
4152 if (!wpa_auth || !wpa_auth->pmksa)
4153 return NULL;
4154 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
4155 }
4156
4157
4158 void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4159 struct wpa_state_machine *sm,
4160 struct wpa_authenticator *wpa_auth,
4161 u8 *pmkid, u8 *pmk)
4162 {
4163 if (!sm)
4164 return;
4165
4166 sm->pmksa = pmksa;
4167 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4168 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4169 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
4170 }
4171
4172
4173 /*
4174 * Remove and free the group from wpa_authenticator. This is triggered by a
4175 * callback to make sure nobody is currently iterating the group list while it
4176 * gets modified.
4177 */
4178 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4179 struct wpa_group *group)
4180 {
4181 struct wpa_group *prev = wpa_auth->group;
4182
4183 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4184 group->vlan_id);
4185
4186 while (prev) {
4187 if (prev->next == group) {
4188 /* This never frees the special first group as needed */
4189 prev->next = group->next;
4190 os_free(group);
4191 break;
4192 }
4193 prev = prev->next;
4194 }
4195
4196 }
4197
4198
4199 /* Increase the reference counter for group */
4200 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4201 struct wpa_group *group)
4202 {
4203 /* Skip the special first group */
4204 if (wpa_auth->group == group)
4205 return;
4206
4207 group->references++;
4208 }
4209
4210
4211 /* Decrease the reference counter and maybe free the group */
4212 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4213 struct wpa_group *group)
4214 {
4215 /* Skip the special first group */
4216 if (wpa_auth->group == group)
4217 return;
4218
4219 group->references--;
4220 if (group->references)
4221 return;
4222 wpa_group_free(wpa_auth, group);
4223 }
4224
4225
4226 /*
4227 * Add a group that has its references counter set to zero. Caller needs to
4228 * call wpa_group_get() on the return value to mark the entry in use.
4229 */
4230 static struct wpa_group *
4231 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4232 {
4233 struct wpa_group *group;
4234
4235 if (wpa_auth == NULL || wpa_auth->group == NULL)
4236 return NULL;
4237
4238 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4239 vlan_id);
4240 group = wpa_group_init(wpa_auth, vlan_id, 0);
4241 if (group == NULL)
4242 return NULL;
4243
4244 group->next = wpa_auth->group->next;
4245 wpa_auth->group->next = group;
4246
4247 return group;
4248 }
4249
4250
4251 /*
4252 * Enforce that the group state machine for the VLAN is running, increase
4253 * reference counter as interface is up. References might have been increased
4254 * even if a negative value is returned.
4255 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4256 */
4257 int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4258 {
4259 struct wpa_group *group;
4260
4261 if (wpa_auth == NULL)
4262 return 0;
4263
4264 group = wpa_auth->group;
4265 while (group) {
4266 if (group->vlan_id == vlan_id)
4267 break;
4268 group = group->next;
4269 }
4270
4271 if (group == NULL) {
4272 group = wpa_auth_add_group(wpa_auth, vlan_id);
4273 if (group == NULL)
4274 return -1;
4275 }
4276
4277 wpa_printf(MSG_DEBUG,
4278 "WPA: Ensure group state machine running for VLAN ID %d",
4279 vlan_id);
4280
4281 wpa_group_get(wpa_auth, group);
4282 group->num_setup_iface++;
4283
4284 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4285 return -1;
4286
4287 return 0;
4288 }
4289
4290
4291 /*
4292 * Decrease reference counter, expected to be zero afterwards.
4293 * returns: -1 on error (group not found, group in fail state)
4294 * -2 if wpa_group is still referenced
4295 * 0 else
4296 */
4297 int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4298 {
4299 struct wpa_group *group;
4300 int ret = 0;
4301
4302 if (wpa_auth == NULL)
4303 return 0;
4304
4305 group = wpa_auth->group;
4306 while (group) {
4307 if (group->vlan_id == vlan_id)
4308 break;
4309 group = group->next;
4310 }
4311
4312 if (group == NULL)
4313 return -1;
4314
4315 wpa_printf(MSG_DEBUG,
4316 "WPA: Try stopping group state machine for VLAN ID %d",
4317 vlan_id);
4318
4319 if (group->num_setup_iface <= 0) {
4320 wpa_printf(MSG_ERROR,
4321 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4322 vlan_id);
4323 return -1;
4324 }
4325 group->num_setup_iface--;
4326
4327 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4328 ret = -1;
4329
4330 if (group->references > 1) {
4331 wpa_printf(MSG_DEBUG,
4332 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4333 vlan_id);
4334 ret = -2;
4335 }
4336
4337 wpa_group_put(wpa_auth, group);
4338
4339 return ret;
4340 }
4341
4342
4343 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4344 {
4345 struct wpa_group *group;
4346
4347 if (sm == NULL || sm->wpa_auth == NULL)
4348 return 0;
4349
4350 group = sm->wpa_auth->group;
4351 while (group) {
4352 if (group->vlan_id == vlan_id)
4353 break;
4354 group = group->next;
4355 }
4356
4357 if (group == NULL) {
4358 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4359 if (group == NULL)
4360 return -1;
4361 }
4362
4363 if (sm->group == group)
4364 return 0;
4365
4366 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4367 return -1;
4368
4369 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4370 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4371
4372 wpa_group_get(sm->wpa_auth, group);
4373 wpa_group_put(sm->wpa_auth, sm->group);
4374 sm->group = group;
4375
4376 return 0;
4377 }
4378
4379
4380 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4381 struct wpa_state_machine *sm, int ack)
4382 {
4383 if (wpa_auth == NULL || sm == NULL)
4384 return;
4385 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4386 " ack=%d", MAC2STR(sm->addr), ack);
4387 if (sm->pending_1_of_4_timeout && ack) {
4388 /*
4389 * Some deployed supplicant implementations update their SNonce
4390 * for each EAPOL-Key 2/4 message even within the same 4-way
4391 * handshake and then fail to use the first SNonce when
4392 * deriving the PTK. This results in unsuccessful 4-way
4393 * handshake whenever the relatively short initial timeout is
4394 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4395 * around this by increasing the timeout now that we know that
4396 * the station has received the frame.
4397 */
4398 int timeout_ms = eapol_key_timeout_subseq;
4399 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4400 "timeout by %u ms because of acknowledged frame",
4401 timeout_ms);
4402 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4403 eloop_register_timeout(timeout_ms / 1000,
4404 (timeout_ms % 1000) * 1000,
4405 wpa_send_eapol_timeout, wpa_auth, sm);
4406 }
4407 }
4408
4409
4410 int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4411 {
4412 if (sm == NULL)
4413 return 0;
4414 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4415 }
4416
4417
4418 int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4419 {
4420 if (sm == NULL)
4421 return 0;
4422 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4423 }
4424
4425
4426 #ifdef CONFIG_P2P
4427 int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4428 {
4429 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4430 return -1;
4431 os_memcpy(addr, sm->ip_addr, 4);
4432 return 0;
4433 }
4434 #endif /* CONFIG_P2P */
4435
4436
4437 int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4438 struct radius_das_attrs *attr)
4439 {
4440 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4441 }
4442
4443
4444 void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4445 {
4446 struct wpa_group *group;
4447
4448 if (!wpa_auth)
4449 return;
4450 for (group = wpa_auth->group; group; group = group->next)
4451 wpa_group_config_group_keys(wpa_auth, group);
4452 }
4453
4454
4455 #ifdef CONFIG_FILS
4456
4457 struct wpa_auth_fils_iter_data {
4458 struct wpa_authenticator *auth;
4459 const u8 *cache_id;
4460 struct rsn_pmksa_cache_entry *pmksa;
4461 const u8 *spa;
4462 const u8 *pmkid;
4463 };
4464
4465
4466 static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4467 {
4468 struct wpa_auth_fils_iter_data *data = ctx;
4469
4470 if (a == data->auth || !a->conf.fils_cache_id_set ||
4471 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4472 FILS_CACHE_ID_LEN) != 0)
4473 return 0;
4474 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4475 return data->pmksa != NULL;
4476 }
4477
4478
4479 struct rsn_pmksa_cache_entry *
4480 wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4481 const u8 *sta_addr, const u8 *pmkid)
4482 {
4483 struct wpa_auth_fils_iter_data idata;
4484
4485 if (!wpa_auth->conf.fils_cache_id_set)
4486 return NULL;
4487 idata.auth = wpa_auth;
4488 idata.cache_id = wpa_auth->conf.fils_cache_id;
4489 idata.pmksa = NULL;
4490 idata.spa = sta_addr;
4491 idata.pmkid = pmkid;
4492 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4493 return idata.pmksa;
4494 }
4495
4496
4497 #ifdef CONFIG_IEEE80211R_AP
4498 int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, u8 *buf, size_t len)
4499 {
4500 struct wpa_auth_config *conf = &wpa_auth->conf;
4501
4502 return wpa_write_ftie(conf, conf->r0_key_holder,
4503 conf->r0_key_holder_len,
4504 NULL, NULL, buf, len, NULL, 0);
4505 }
4506 #endif /* CONFIG_IEEE80211R_AP */
4507
4508
4509 void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4510 u8 *fils_anonce, u8 *fils_snonce,
4511 u8 *fils_kek, size_t *fils_kek_len)
4512 {
4513 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4514 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4515 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4516 *fils_kek_len = sm->PTK.kek_len;
4517 }
4518
4519 #endif /* CONFIG_FILS */
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