xref: /freebsd/contrib/wpa/src/ap/wpa_auth.c (revision 52c2bb75163559a6e2866ad374a7de67a4ea1273)
1 /*
2  * IEEE 802.11 RSN / WPA Authenticator
3  * Copyright (c) 2004-2019, 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 "common/ocv.h"
17 #include "crypto/aes.h"
18 #include "crypto/aes_wrap.h"
19 #include "crypto/aes_siv.h"
20 #include "crypto/crypto.h"
21 #include "crypto/sha1.h"
22 #include "crypto/sha256.h"
23 #include "crypto/sha384.h"
24 #include "crypto/random.h"
25 #include "eapol_auth/eapol_auth_sm.h"
26 #include "drivers/driver.h"
27 #include "ap_config.h"
28 #include "ieee802_11.h"
29 #include "wpa_auth.h"
30 #include "pmksa_cache_auth.h"
31 #include "wpa_auth_i.h"
32 #include "wpa_auth_ie.h"
33 
34 #define STATE_MACHINE_DATA struct wpa_state_machine
35 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
36 #define STATE_MACHINE_ADDR sm->addr
37 
38 
39 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
40 static int wpa_sm_step(struct wpa_state_machine *sm);
41 static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
42 			      u8 *data, size_t data_len);
43 #ifdef CONFIG_FILS
44 static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
45 			    u8 *buf, size_t buf_len, u16 *_key_data_len);
46 static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
47 					     const struct wpabuf *hlp);
48 #endif /* CONFIG_FILS */
49 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
50 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
51 			      struct wpa_group *group);
52 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
53 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
54 			  struct wpa_group *group);
55 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
56 				       struct wpa_group *group);
57 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
58 			  const u8 *pmk, unsigned int pmk_len,
59 			  struct wpa_ptk *ptk);
60 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
61 			   struct wpa_group *group);
62 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
63 			  struct wpa_group *group);
64 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
65 			  struct wpa_group *group);
66 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
67 
68 static const u32 eapol_key_timeout_first = 100; /* ms */
69 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
70 static const u32 eapol_key_timeout_first_group = 500; /* ms */
71 static const u32 eapol_key_timeout_no_retrans = 4000; /* ms */
72 
73 /* TODO: make these configurable */
74 static const int dot11RSNAConfigPMKLifetime = 43200;
75 static const int dot11RSNAConfigPMKReauthThreshold = 70;
76 static const int dot11RSNAConfigSATimeout = 60;
77 
78 
79 static inline int wpa_auth_mic_failure_report(
80 	struct wpa_authenticator *wpa_auth, const u8 *addr)
81 {
82 	if (wpa_auth->cb->mic_failure_report)
83 		return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
84 	return 0;
85 }
86 
87 
88 static inline void wpa_auth_psk_failure_report(
89 	struct wpa_authenticator *wpa_auth, const u8 *addr)
90 {
91 	if (wpa_auth->cb->psk_failure_report)
92 		wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
93 }
94 
95 
96 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
97 				      const u8 *addr, wpa_eapol_variable var,
98 				      int value)
99 {
100 	if (wpa_auth->cb->set_eapol)
101 		wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
102 }
103 
104 
105 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
106 				     const u8 *addr, wpa_eapol_variable var)
107 {
108 	if (wpa_auth->cb->get_eapol == NULL)
109 		return -1;
110 	return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
111 }
112 
113 
114 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
115 					  const u8 *addr,
116 					  const u8 *p2p_dev_addr,
117 					  const u8 *prev_psk, size_t *psk_len,
118 					  int *vlan_id)
119 {
120 	if (wpa_auth->cb->get_psk == NULL)
121 		return NULL;
122 	return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
123 				     prev_psk, psk_len, vlan_id);
124 }
125 
126 
127 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
128 				   const u8 *addr, u8 *msk, size_t *len)
129 {
130 	if (wpa_auth->cb->get_msk == NULL)
131 		return -1;
132 	return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
133 }
134 
135 
136 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
137 				   int vlan_id,
138 				   enum wpa_alg alg, const u8 *addr, int idx,
139 				   u8 *key, size_t key_len)
140 {
141 	if (wpa_auth->cb->set_key == NULL)
142 		return -1;
143 	return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
144 				     key, key_len);
145 }
146 
147 
148 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
149 				      const u8 *addr, int idx, u8 *seq)
150 {
151 	if (wpa_auth->cb->get_seqnum == NULL)
152 		return -1;
153 	return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
154 }
155 
156 
157 static inline int
158 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
159 		    const u8 *data, size_t data_len, int encrypt)
160 {
161 	if (wpa_auth->cb->send_eapol == NULL)
162 		return -1;
163 	return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
164 					encrypt);
165 }
166 
167 
168 #ifdef CONFIG_MESH
169 static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
170 				      const u8 *addr)
171 {
172 	if (wpa_auth->cb->start_ampe == NULL)
173 		return -1;
174 	return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
175 }
176 #endif /* CONFIG_MESH */
177 
178 
179 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
180 			  int (*cb)(struct wpa_state_machine *sm, void *ctx),
181 			  void *cb_ctx)
182 {
183 	if (wpa_auth->cb->for_each_sta == NULL)
184 		return 0;
185 	return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
186 }
187 
188 
189 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
190 			   int (*cb)(struct wpa_authenticator *a, void *ctx),
191 			   void *cb_ctx)
192 {
193 	if (wpa_auth->cb->for_each_auth == NULL)
194 		return 0;
195 	return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
196 }
197 
198 
199 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
200 		     logger_level level, const char *txt)
201 {
202 	if (wpa_auth->cb->logger == NULL)
203 		return;
204 	wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
205 }
206 
207 
208 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
209 		      logger_level level, const char *fmt, ...)
210 {
211 	char *format;
212 	int maxlen;
213 	va_list ap;
214 
215 	if (wpa_auth->cb->logger == NULL)
216 		return;
217 
218 	maxlen = os_strlen(fmt) + 100;
219 	format = os_malloc(maxlen);
220 	if (!format)
221 		return;
222 
223 	va_start(ap, fmt);
224 	vsnprintf(format, maxlen, fmt, ap);
225 	va_end(ap);
226 
227 	wpa_auth_logger(wpa_auth, addr, level, format);
228 
229 	os_free(format);
230 }
231 
232 
233 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
234 			       const u8 *addr, u16 reason)
235 {
236 	if (wpa_auth->cb->disconnect == NULL)
237 		return;
238 	wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)",
239 		   MAC2STR(addr), reason);
240 	wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason);
241 }
242 
243 
244 #ifdef CONFIG_OCV
245 static int wpa_channel_info(struct wpa_authenticator *wpa_auth,
246 			    struct wpa_channel_info *ci)
247 {
248 	if (!wpa_auth->cb->channel_info)
249 		return -1;
250 	return wpa_auth->cb->channel_info(wpa_auth->cb_ctx, ci);
251 }
252 #endif /* CONFIG_OCV */
253 
254 
255 static int wpa_auth_update_vlan(struct wpa_authenticator *wpa_auth,
256 				const u8 *addr, int vlan_id)
257 {
258 	if (!wpa_auth->cb->update_vlan)
259 		return -1;
260 	return wpa_auth->cb->update_vlan(wpa_auth->cb_ctx, addr, vlan_id);
261 }
262 
263 
264 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
265 {
266 	struct wpa_authenticator *wpa_auth = eloop_ctx;
267 
268 	if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
269 		wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
270 			   "initialization.");
271 	} else {
272 		wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
273 		wpa_hexdump_key(MSG_DEBUG, "GMK",
274 				wpa_auth->group->GMK, WPA_GMK_LEN);
275 	}
276 
277 	if (wpa_auth->conf.wpa_gmk_rekey) {
278 		eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
279 				       wpa_rekey_gmk, wpa_auth, NULL);
280 	}
281 }
282 
283 
284 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
285 {
286 	struct wpa_authenticator *wpa_auth = eloop_ctx;
287 	struct wpa_group *group, *next;
288 
289 	wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
290 	group = wpa_auth->group;
291 	while (group) {
292 		wpa_group_get(wpa_auth, group);
293 
294 		group->GTKReKey = TRUE;
295 		do {
296 			group->changed = FALSE;
297 			wpa_group_sm_step(wpa_auth, group);
298 		} while (group->changed);
299 
300 		next = group->next;
301 		wpa_group_put(wpa_auth, group);
302 		group = next;
303 	}
304 
305 	if (wpa_auth->conf.wpa_group_rekey) {
306 		eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
307 				       0, wpa_rekey_gtk, wpa_auth, NULL);
308 	}
309 }
310 
311 
312 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
313 {
314 	struct wpa_authenticator *wpa_auth = eloop_ctx;
315 	struct wpa_state_machine *sm = timeout_ctx;
316 
317 	wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
318 	wpa_request_new_ptk(sm);
319 	wpa_sm_step(sm);
320 }
321 
322 
323 void wpa_auth_set_ptk_rekey_timer(struct wpa_state_machine *sm)
324 {
325 	if (sm && sm->wpa_auth->conf.wpa_ptk_rekey) {
326 		wpa_printf(MSG_DEBUG, "WPA: Start PTK rekeying timer for "
327 			   MACSTR " (%d seconds)", MAC2STR(sm->addr),
328 			   sm->wpa_auth->conf.wpa_ptk_rekey);
329 		eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
330 		eloop_register_timeout(sm->wpa_auth->conf.wpa_ptk_rekey, 0,
331 				       wpa_rekey_ptk, sm->wpa_auth, sm);
332 	}
333 }
334 
335 
336 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
337 {
338 	if (sm->pmksa == ctx)
339 		sm->pmksa = NULL;
340 	return 0;
341 }
342 
343 
344 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
345 				   void *ctx)
346 {
347 	struct wpa_authenticator *wpa_auth = ctx;
348 	wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
349 }
350 
351 
352 static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
353 					  struct wpa_group *group)
354 {
355 	u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
356 	u8 rkey[32];
357 	unsigned long ptr;
358 
359 	if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
360 		return -1;
361 	wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
362 
363 	/*
364 	 * Counter = PRF-256(Random number, "Init Counter",
365 	 *                   Local MAC Address || Time)
366 	 */
367 	os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
368 	wpa_get_ntp_timestamp(buf + ETH_ALEN);
369 	ptr = (unsigned long) group;
370 	os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
371 #ifdef TEST_FUZZ
372 	os_memset(buf + ETH_ALEN, 0xab, 8);
373 	os_memset(buf + ETH_ALEN + 8, 0xcd, sizeof(ptr));
374 #endif /* TEST_FUZZ */
375 	if (random_get_bytes(rkey, sizeof(rkey)) < 0)
376 		return -1;
377 
378 	if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
379 		     group->Counter, WPA_NONCE_LEN) < 0)
380 		return -1;
381 	wpa_hexdump_key(MSG_DEBUG, "Key Counter",
382 			group->Counter, WPA_NONCE_LEN);
383 
384 	return 0;
385 }
386 
387 
388 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
389 					 int vlan_id, int delay_init)
390 {
391 	struct wpa_group *group;
392 
393 	group = os_zalloc(sizeof(struct wpa_group));
394 	if (group == NULL)
395 		return NULL;
396 
397 	group->GTKAuthenticator = TRUE;
398 	group->vlan_id = vlan_id;
399 	group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
400 
401 	if (random_pool_ready() != 1) {
402 		wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
403 			   "for secure operations - update keys later when "
404 			   "the first station connects");
405 	}
406 
407 	/*
408 	 * Set initial GMK/Counter value here. The actual values that will be
409 	 * used in negotiations will be set once the first station tries to
410 	 * connect. This allows more time for collecting additional randomness
411 	 * on embedded devices.
412 	 */
413 	if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
414 		wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
415 			   "initialization.");
416 		os_free(group);
417 		return NULL;
418 	}
419 
420 	group->GInit = TRUE;
421 	if (delay_init) {
422 		wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
423 			   "until Beacon frames have been configured");
424 		/* Initialization is completed in wpa_init_keys(). */
425 	} else {
426 		wpa_group_sm_step(wpa_auth, group);
427 		group->GInit = FALSE;
428 		wpa_group_sm_step(wpa_auth, group);
429 	}
430 
431 	return group;
432 }
433 
434 
435 /**
436  * wpa_init - Initialize WPA authenticator
437  * @addr: Authenticator address
438  * @conf: Configuration for WPA authenticator
439  * @cb: Callback functions for WPA authenticator
440  * Returns: Pointer to WPA authenticator data or %NULL on failure
441  */
442 struct wpa_authenticator * wpa_init(const u8 *addr,
443 				    struct wpa_auth_config *conf,
444 				    const struct wpa_auth_callbacks *cb,
445 				    void *cb_ctx)
446 {
447 	struct wpa_authenticator *wpa_auth;
448 
449 	wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
450 	if (wpa_auth == NULL)
451 		return NULL;
452 	os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
453 	os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
454 	wpa_auth->cb = cb;
455 	wpa_auth->cb_ctx = cb_ctx;
456 
457 	if (wpa_auth_gen_wpa_ie(wpa_auth)) {
458 		wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
459 		os_free(wpa_auth);
460 		return NULL;
461 	}
462 
463 	wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
464 	if (wpa_auth->group == NULL) {
465 		os_free(wpa_auth->wpa_ie);
466 		os_free(wpa_auth);
467 		return NULL;
468 	}
469 
470 	wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
471 						wpa_auth);
472 	if (wpa_auth->pmksa == NULL) {
473 		wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
474 		os_free(wpa_auth->group);
475 		os_free(wpa_auth->wpa_ie);
476 		os_free(wpa_auth);
477 		return NULL;
478 	}
479 
480 #ifdef CONFIG_IEEE80211R_AP
481 	wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
482 	if (wpa_auth->ft_pmk_cache == NULL) {
483 		wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
484 		os_free(wpa_auth->group);
485 		os_free(wpa_auth->wpa_ie);
486 		pmksa_cache_auth_deinit(wpa_auth->pmksa);
487 		os_free(wpa_auth);
488 		return NULL;
489 	}
490 #endif /* CONFIG_IEEE80211R_AP */
491 
492 	if (wpa_auth->conf.wpa_gmk_rekey) {
493 		eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
494 				       wpa_rekey_gmk, wpa_auth, NULL);
495 	}
496 
497 	if (wpa_auth->conf.wpa_group_rekey) {
498 		eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
499 				       wpa_rekey_gtk, wpa_auth, NULL);
500 	}
501 
502 #ifdef CONFIG_P2P
503 	if (WPA_GET_BE32(conf->ip_addr_start)) {
504 		int count = WPA_GET_BE32(conf->ip_addr_end) -
505 			WPA_GET_BE32(conf->ip_addr_start) + 1;
506 		if (count > 1000)
507 			count = 1000;
508 		if (count > 0)
509 			wpa_auth->ip_pool = bitfield_alloc(count);
510 	}
511 #endif /* CONFIG_P2P */
512 
513 	return wpa_auth;
514 }
515 
516 
517 int wpa_init_keys(struct wpa_authenticator *wpa_auth)
518 {
519 	struct wpa_group *group = wpa_auth->group;
520 
521 	wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
522 		   "keys");
523 	wpa_group_sm_step(wpa_auth, group);
524 	group->GInit = FALSE;
525 	wpa_group_sm_step(wpa_auth, group);
526 	if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
527 		return -1;
528 	return 0;
529 }
530 
531 
532 /**
533  * wpa_deinit - Deinitialize WPA authenticator
534  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
535  */
536 void wpa_deinit(struct wpa_authenticator *wpa_auth)
537 {
538 	struct wpa_group *group, *prev;
539 
540 	eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
541 	eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
542 
543 	pmksa_cache_auth_deinit(wpa_auth->pmksa);
544 
545 #ifdef CONFIG_IEEE80211R_AP
546 	wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
547 	wpa_auth->ft_pmk_cache = NULL;
548 	wpa_ft_deinit(wpa_auth);
549 #endif /* CONFIG_IEEE80211R_AP */
550 
551 #ifdef CONFIG_P2P
552 	bitfield_free(wpa_auth->ip_pool);
553 #endif /* CONFIG_P2P */
554 
555 
556 	os_free(wpa_auth->wpa_ie);
557 
558 	group = wpa_auth->group;
559 	while (group) {
560 		prev = group;
561 		group = group->next;
562 		os_free(prev);
563 	}
564 
565 	os_free(wpa_auth);
566 }
567 
568 
569 /**
570  * wpa_reconfig - Update WPA authenticator configuration
571  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
572  * @conf: Configuration for WPA authenticator
573  */
574 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
575 		 struct wpa_auth_config *conf)
576 {
577 	struct wpa_group *group;
578 	if (wpa_auth == NULL)
579 		return 0;
580 
581 	os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
582 	if (wpa_auth_gen_wpa_ie(wpa_auth)) {
583 		wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
584 		return -1;
585 	}
586 
587 	/*
588 	 * Reinitialize GTK to make sure it is suitable for the new
589 	 * configuration.
590 	 */
591 	group = wpa_auth->group;
592 	group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
593 	group->GInit = TRUE;
594 	wpa_group_sm_step(wpa_auth, group);
595 	group->GInit = FALSE;
596 	wpa_group_sm_step(wpa_auth, group);
597 
598 	return 0;
599 }
600 
601 
602 struct wpa_state_machine *
603 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
604 		  const u8 *p2p_dev_addr)
605 {
606 	struct wpa_state_machine *sm;
607 
608 	if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
609 		return NULL;
610 
611 	sm = os_zalloc(sizeof(struct wpa_state_machine));
612 	if (sm == NULL)
613 		return NULL;
614 	os_memcpy(sm->addr, addr, ETH_ALEN);
615 	if (p2p_dev_addr)
616 		os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
617 
618 	sm->wpa_auth = wpa_auth;
619 	sm->group = wpa_auth->group;
620 	wpa_group_get(sm->wpa_auth, sm->group);
621 
622 	return sm;
623 }
624 
625 
626 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
627 			    struct wpa_state_machine *sm)
628 {
629 	if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
630 		return -1;
631 
632 #ifdef CONFIG_IEEE80211R_AP
633 	if (sm->ft_completed) {
634 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
635 				"FT authentication already completed - do not "
636 				"start 4-way handshake");
637 		/* Go to PTKINITDONE state to allow GTK rekeying */
638 		sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
639 		sm->Pair = TRUE;
640 		return 0;
641 	}
642 #endif /* CONFIG_IEEE80211R_AP */
643 
644 #ifdef CONFIG_FILS
645 	if (sm->fils_completed) {
646 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
647 				"FILS authentication already completed - do not start 4-way handshake");
648 		/* Go to PTKINITDONE state to allow GTK rekeying */
649 		sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
650 		sm->Pair = TRUE;
651 		return 0;
652 	}
653 #endif /* CONFIG_FILS */
654 
655 	if (sm->started) {
656 		os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
657 		sm->ReAuthenticationRequest = TRUE;
658 		return wpa_sm_step(sm);
659 	}
660 
661 	wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
662 			"start authentication");
663 	sm->started = 1;
664 
665 	sm->Init = TRUE;
666 	if (wpa_sm_step(sm) == 1)
667 		return 1; /* should not really happen */
668 	sm->Init = FALSE;
669 	sm->AuthenticationRequest = TRUE;
670 	return wpa_sm_step(sm);
671 }
672 
673 
674 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
675 {
676 	/* WPA/RSN was not used - clear WPA state. This is needed if the STA
677 	 * reassociates back to the same AP while the previous entry for the
678 	 * STA has not yet been removed. */
679 	if (sm == NULL)
680 		return;
681 
682 	sm->wpa_key_mgmt = 0;
683 }
684 
685 
686 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
687 {
688 #ifdef CONFIG_P2P
689 	if (WPA_GET_BE32(sm->ip_addr)) {
690 		u32 start;
691 		wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
692 			   "address %u.%u.%u.%u from " MACSTR,
693 			   sm->ip_addr[0], sm->ip_addr[1],
694 			   sm->ip_addr[2], sm->ip_addr[3],
695 			   MAC2STR(sm->addr));
696 		start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
697 		bitfield_clear(sm->wpa_auth->ip_pool,
698 			       WPA_GET_BE32(sm->ip_addr) - start);
699 	}
700 #endif /* CONFIG_P2P */
701 	if (sm->GUpdateStationKeys) {
702 		sm->group->GKeyDoneStations--;
703 		sm->GUpdateStationKeys = FALSE;
704 	}
705 #ifdef CONFIG_IEEE80211R_AP
706 	os_free(sm->assoc_resp_ftie);
707 	wpabuf_free(sm->ft_pending_req_ies);
708 #endif /* CONFIG_IEEE80211R_AP */
709 	os_free(sm->last_rx_eapol_key);
710 	os_free(sm->wpa_ie);
711 	wpa_group_put(sm->wpa_auth, sm->group);
712 #ifdef CONFIG_DPP2
713 	wpabuf_clear_free(sm->dpp_z);
714 #endif /* CONFIG_DPP2 */
715 	bin_clear_free(sm, sizeof(*sm));
716 }
717 
718 
719 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
720 {
721 	if (sm == NULL)
722 		return;
723 
724 	if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
725 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
726 				"strict rekeying - force GTK rekey since STA "
727 				"is leaving");
728 		if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk,
729 					  sm->wpa_auth, NULL) == -1)
730 			eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
731 					       NULL);
732 	}
733 
734 	eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
735 	sm->pending_1_of_4_timeout = 0;
736 	eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
737 	eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
738 #ifdef CONFIG_IEEE80211R_AP
739 	wpa_ft_sta_deinit(sm);
740 #endif /* CONFIG_IEEE80211R_AP */
741 	if (sm->in_step_loop) {
742 		/* Must not free state machine while wpa_sm_step() is running.
743 		 * Freeing will be completed in the end of wpa_sm_step(). */
744 		wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
745 			   "machine deinit for " MACSTR, MAC2STR(sm->addr));
746 		sm->pending_deinit = 1;
747 	} else
748 		wpa_free_sta_sm(sm);
749 }
750 
751 
752 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
753 {
754 	if (sm == NULL)
755 		return;
756 
757 	sm->PTKRequest = TRUE;
758 	sm->PTK_valid = 0;
759 }
760 
761 
762 static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
763 				    const u8 *replay_counter)
764 {
765 	int i;
766 	for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
767 		if (!ctr[i].valid)
768 			break;
769 		if (os_memcmp(replay_counter, ctr[i].counter,
770 			      WPA_REPLAY_COUNTER_LEN) == 0)
771 			return 1;
772 	}
773 	return 0;
774 }
775 
776 
777 static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
778 					    const u8 *replay_counter)
779 {
780 	int i;
781 	for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
782 		if (ctr[i].valid &&
783 		    (replay_counter == NULL ||
784 		     os_memcmp(replay_counter, ctr[i].counter,
785 			       WPA_REPLAY_COUNTER_LEN) == 0))
786 			ctr[i].valid = FALSE;
787 	}
788 }
789 
790 
791 #ifdef CONFIG_IEEE80211R_AP
792 static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
793 			       struct wpa_state_machine *sm,
794 			       struct wpa_eapol_ie_parse *kde)
795 {
796 	struct wpa_ie_data ie;
797 	struct rsn_mdie *mdie;
798 
799 	if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
800 	    ie.num_pmkid != 1 || ie.pmkid == NULL) {
801 		wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
802 			   "FT 4-way handshake message 2/4");
803 		return -1;
804 	}
805 
806 	os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
807 	wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
808 		    sm->sup_pmk_r1_name, PMKID_LEN);
809 
810 	if (!kde->mdie || !kde->ftie) {
811 		wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
812 			   "message 2/4", kde->mdie ? "FTIE" : "MDIE");
813 		return -1;
814 	}
815 
816 	mdie = (struct rsn_mdie *) (kde->mdie + 2);
817 	if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
818 	    os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
819 		      MOBILITY_DOMAIN_ID_LEN) != 0) {
820 		wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
821 		return -1;
822 	}
823 
824 	if (sm->assoc_resp_ftie &&
825 	    (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
826 	     os_memcmp(kde->ftie, sm->assoc_resp_ftie,
827 		       2 + sm->assoc_resp_ftie[1]) != 0)) {
828 		wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
829 		wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
830 			    kde->ftie, kde->ftie_len);
831 		wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
832 			    sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
833 		return -1;
834 	}
835 
836 	return 0;
837 }
838 #endif /* CONFIG_IEEE80211R_AP */
839 
840 
841 static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
842 				    struct wpa_state_machine *sm, int group)
843 {
844 	/* Supplicant reported a Michael MIC error */
845 	wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
846 			 "received EAPOL-Key Error Request "
847 			 "(STA detected Michael MIC failure (group=%d))",
848 			 group);
849 
850 	if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
851 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
852 				"ignore Michael MIC failure report since "
853 				"group cipher is not TKIP");
854 	} else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
855 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
856 				"ignore Michael MIC failure report since "
857 				"pairwise cipher is not TKIP");
858 	} else {
859 		if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
860 			return 1; /* STA entry was removed */
861 		sm->dot11RSNAStatsTKIPRemoteMICFailures++;
862 		wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
863 	}
864 
865 	/*
866 	 * Error report is not a request for a new key handshake, but since
867 	 * Authenticator may do it, let's change the keys now anyway.
868 	 */
869 	wpa_request_new_ptk(sm);
870 	return 0;
871 }
872 
873 
874 static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
875 			      size_t data_len)
876 {
877 	struct wpa_ptk PTK;
878 	int ok = 0;
879 	const u8 *pmk = NULL;
880 	size_t pmk_len;
881 	int vlan_id = 0;
882 
883 	os_memset(&PTK, 0, sizeof(PTK));
884 	for (;;) {
885 		if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
886 		    !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
887 			pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
888 					       sm->p2p_dev_addr, pmk, &pmk_len,
889 					       &vlan_id);
890 			if (pmk == NULL)
891 				break;
892 #ifdef CONFIG_IEEE80211R_AP
893 			if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
894 				os_memcpy(sm->xxkey, pmk, pmk_len);
895 				sm->xxkey_len = pmk_len;
896 			}
897 #endif /* CONFIG_IEEE80211R_AP */
898 		} else {
899 			pmk = sm->PMK;
900 			pmk_len = sm->pmk_len;
901 		}
902 
903 		if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
904 			break;
905 
906 		if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
907 				       data, data_len) == 0) {
908 			if (sm->PMK != pmk) {
909 				os_memcpy(sm->PMK, pmk, pmk_len);
910 				sm->pmk_len = pmk_len;
911 			}
912 			ok = 1;
913 			break;
914 		}
915 
916 		if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
917 		    wpa_key_mgmt_sae(sm->wpa_key_mgmt))
918 			break;
919 	}
920 
921 	if (!ok) {
922 		wpa_printf(MSG_DEBUG,
923 			   "WPA: Earlier SNonce did not result in matching MIC");
924 		return -1;
925 	}
926 
927 	wpa_printf(MSG_DEBUG,
928 		   "WPA: Earlier SNonce resulted in matching MIC");
929 	sm->alt_snonce_valid = 0;
930 
931 	if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
932 	    wpa_auth_update_vlan(sm->wpa_auth, sm->addr, vlan_id) < 0)
933 		return -1;
934 
935 	os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
936 	os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
937 	sm->PTK_valid = TRUE;
938 
939 	return 0;
940 }
941 
942 
943 void wpa_receive(struct wpa_authenticator *wpa_auth,
944 		 struct wpa_state_machine *sm,
945 		 u8 *data, size_t data_len)
946 {
947 	struct ieee802_1x_hdr *hdr;
948 	struct wpa_eapol_key *key;
949 	u16 key_info, key_data_length;
950 	enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg;
951 	char *msgtxt;
952 	struct wpa_eapol_ie_parse kde;
953 	const u8 *key_data;
954 	size_t keyhdrlen, mic_len;
955 	u8 *mic;
956 
957 	if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
958 		return;
959 	wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
960 
961 	mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
962 	keyhdrlen = sizeof(*key) + mic_len + 2;
963 
964 	if (data_len < sizeof(*hdr) + keyhdrlen) {
965 		wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
966 		return;
967 	}
968 
969 	hdr = (struct ieee802_1x_hdr *) data;
970 	key = (struct wpa_eapol_key *) (hdr + 1);
971 	mic = (u8 *) (key + 1);
972 	key_info = WPA_GET_BE16(key->key_info);
973 	key_data = mic + mic_len + 2;
974 	key_data_length = WPA_GET_BE16(mic + mic_len);
975 	wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
976 		   " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
977 		   MAC2STR(sm->addr), key_info, key->type,
978 		   (unsigned int) mic_len, key_data_length);
979 	wpa_hexdump(MSG_MSGDUMP,
980 		    "WPA: EAPOL-Key header (ending before Key MIC)",
981 		    key, sizeof(*key));
982 	wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
983 		    mic, mic_len);
984 	if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
985 		wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
986 			   "key_data overflow (%d > %lu)",
987 			   key_data_length,
988 			   (unsigned long) (data_len - sizeof(*hdr) -
989 					    keyhdrlen));
990 		return;
991 	}
992 
993 	if (sm->wpa == WPA_VERSION_WPA2) {
994 		if (key->type == EAPOL_KEY_TYPE_WPA) {
995 			/*
996 			 * Some deployed station implementations seem to send
997 			 * msg 4/4 with incorrect type value in WPA2 mode.
998 			 */
999 			wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
1000 				   "with unexpected WPA type in RSN mode");
1001 		} else if (key->type != EAPOL_KEY_TYPE_RSN) {
1002 			wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1003 				   "unexpected type %d in RSN mode",
1004 				   key->type);
1005 			return;
1006 		}
1007 	} else {
1008 		if (key->type != EAPOL_KEY_TYPE_WPA) {
1009 			wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1010 				   "unexpected type %d in WPA mode",
1011 				   key->type);
1012 			return;
1013 		}
1014 	}
1015 
1016 	wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
1017 		    WPA_NONCE_LEN);
1018 	wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
1019 		    key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1020 
1021 	/* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
1022 	 * are set */
1023 
1024 	if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1025 		wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message");
1026 		return;
1027 	}
1028 
1029 	if (key_info & WPA_KEY_INFO_REQUEST) {
1030 		msg = REQUEST;
1031 		msgtxt = "Request";
1032 	} else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1033 		msg = GROUP_2;
1034 		msgtxt = "2/2 Group";
1035 	} else if (key_data_length == 0 ||
1036 		   (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
1037 		    key_data_length == AES_BLOCK_SIZE)) {
1038 		msg = PAIRWISE_4;
1039 		msgtxt = "4/4 Pairwise";
1040 	} else {
1041 		msg = PAIRWISE_2;
1042 		msgtxt = "2/4 Pairwise";
1043 	}
1044 
1045 	if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1046 	    msg == GROUP_2) {
1047 		u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1048 		if (sm->pairwise == WPA_CIPHER_CCMP ||
1049 		    sm->pairwise == WPA_CIPHER_GCMP) {
1050 			if (wpa_use_cmac(sm->wpa_key_mgmt) &&
1051 			    !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
1052 			    ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1053 				wpa_auth_logger(wpa_auth, sm->addr,
1054 						LOGGER_WARNING,
1055 						"advertised support for "
1056 						"AES-128-CMAC, but did not "
1057 						"use it");
1058 				return;
1059 			}
1060 
1061 			if (!wpa_use_cmac(sm->wpa_key_mgmt) &&
1062 			    !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
1063 			    ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1064 				wpa_auth_logger(wpa_auth, sm->addr,
1065 						LOGGER_WARNING,
1066 						"did not use HMAC-SHA1-AES "
1067 						"with CCMP/GCMP");
1068 				return;
1069 			}
1070 		}
1071 
1072 		if (wpa_use_akm_defined(sm->wpa_key_mgmt) &&
1073 		    ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1074 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1075 					"did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1076 			return;
1077 		}
1078 	}
1079 
1080 	if (key_info & WPA_KEY_INFO_REQUEST) {
1081 		if (sm->req_replay_counter_used &&
1082 		    os_memcmp(key->replay_counter, sm->req_replay_counter,
1083 			      WPA_REPLAY_COUNTER_LEN) <= 0) {
1084 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1085 					"received EAPOL-Key request with "
1086 					"replayed counter");
1087 			return;
1088 		}
1089 	}
1090 
1091 	if (!(key_info & WPA_KEY_INFO_REQUEST) &&
1092 	    !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
1093 		int i;
1094 
1095 		if (msg == PAIRWISE_2 &&
1096 		    wpa_replay_counter_valid(sm->prev_key_replay,
1097 					     key->replay_counter) &&
1098 		    sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1099 		    os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1100 		{
1101 			/*
1102 			 * Some supplicant implementations (e.g., Windows XP
1103 			 * WZC) update SNonce for each EAPOL-Key 2/4. This
1104 			 * breaks the workaround on accepting any of the
1105 			 * pending requests, so allow the SNonce to be updated
1106 			 * even if we have already sent out EAPOL-Key 3/4.
1107 			 */
1108 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1109 					 "Process SNonce update from STA "
1110 					 "based on retransmitted EAPOL-Key "
1111 					 "1/4");
1112 			sm->update_snonce = 1;
1113 			os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1114 			sm->alt_snonce_valid = TRUE;
1115 			os_memcpy(sm->alt_replay_counter,
1116 				  sm->key_replay[0].counter,
1117 				  WPA_REPLAY_COUNTER_LEN);
1118 			goto continue_processing;
1119 		}
1120 
1121 		if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1122 		    sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1123 		    os_memcmp(key->replay_counter, sm->alt_replay_counter,
1124 			      WPA_REPLAY_COUNTER_LEN) == 0) {
1125 			/*
1126 			 * Supplicant may still be using the old SNonce since
1127 			 * there was two EAPOL-Key 2/4 messages and they had
1128 			 * different SNonce values.
1129 			 */
1130 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1131 					 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
1132 			goto continue_processing;
1133 		}
1134 
1135 		if (msg == PAIRWISE_2 &&
1136 		    wpa_replay_counter_valid(sm->prev_key_replay,
1137 					     key->replay_counter) &&
1138 		    sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1139 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1140 					 "ignore retransmitted EAPOL-Key %s - "
1141 					 "SNonce did not change", msgtxt);
1142 		} else {
1143 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1144 					 "received EAPOL-Key %s with "
1145 					 "unexpected replay counter", msgtxt);
1146 		}
1147 		for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1148 			if (!sm->key_replay[i].valid)
1149 				break;
1150 			wpa_hexdump(MSG_DEBUG, "pending replay counter",
1151 				    sm->key_replay[i].counter,
1152 				    WPA_REPLAY_COUNTER_LEN);
1153 		}
1154 		wpa_hexdump(MSG_DEBUG, "received replay counter",
1155 			    key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1156 		return;
1157 	}
1158 
1159 continue_processing:
1160 #ifdef CONFIG_FILS
1161 	if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1162 	    !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1163 		wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1164 				 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1165 		return;
1166 	}
1167 #endif /* CONFIG_FILS */
1168 
1169 	switch (msg) {
1170 	case PAIRWISE_2:
1171 		if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
1172 		    sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1173 		    (!sm->update_snonce ||
1174 		     sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
1175 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1176 					 "received EAPOL-Key msg 2/4 in "
1177 					 "invalid state (%d) - dropped",
1178 					 sm->wpa_ptk_state);
1179 			return;
1180 		}
1181 		random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
1182 		if (sm->group->reject_4way_hs_for_entropy) {
1183 			/*
1184 			 * The system did not have enough entropy to generate
1185 			 * strong random numbers. Reject the first 4-way
1186 			 * handshake(s) and collect some entropy based on the
1187 			 * information from it. Once enough entropy is
1188 			 * available, the next atempt will trigger GMK/Key
1189 			 * Counter update and the station will be allowed to
1190 			 * continue.
1191 			 */
1192 			wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1193 				   "collect more entropy for random number "
1194 				   "generation");
1195 			random_mark_pool_ready();
1196 			wpa_sta_disconnect(wpa_auth, sm->addr,
1197 					   WLAN_REASON_PREV_AUTH_NOT_VALID);
1198 			return;
1199 		}
1200 		break;
1201 	case PAIRWISE_4:
1202 		if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1203 		    !sm->PTK_valid) {
1204 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1205 					 "received EAPOL-Key msg 4/4 in "
1206 					 "invalid state (%d) - dropped",
1207 					 sm->wpa_ptk_state);
1208 			return;
1209 		}
1210 		break;
1211 	case GROUP_2:
1212 		if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1213 		    || !sm->PTK_valid) {
1214 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1215 					 "received EAPOL-Key msg 2/2 in "
1216 					 "invalid state (%d) - dropped",
1217 					 sm->wpa_ptk_group_state);
1218 			return;
1219 		}
1220 		break;
1221 	case REQUEST:
1222 		break;
1223 	}
1224 
1225 	wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1226 			 "received EAPOL-Key frame (%s)", msgtxt);
1227 
1228 	if (key_info & WPA_KEY_INFO_ACK) {
1229 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1230 				"received invalid EAPOL-Key: Key Ack set");
1231 		return;
1232 	}
1233 
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 not set");
1238 		return;
1239 	}
1240 
1241 #ifdef CONFIG_FILS
1242 	if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1243 	    (key_info & WPA_KEY_INFO_MIC)) {
1244 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1245 				"received invalid EAPOL-Key: Key MIC set");
1246 		return;
1247 	}
1248 #endif /* CONFIG_FILS */
1249 
1250 	sm->MICVerified = FALSE;
1251 	if (sm->PTK_valid && !sm->update_snonce) {
1252 		if (mic_len &&
1253 		    wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1254 				       data, data_len) &&
1255 		    (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1256 		     wpa_try_alt_snonce(sm, data, data_len))) {
1257 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1258 					"received EAPOL-Key with invalid MIC");
1259 #ifdef TEST_FUZZ
1260 			wpa_printf(MSG_INFO,
1261 				   "TEST: Ignore Key MIC failure for fuzz testing");
1262 			goto continue_fuzz;
1263 #endif /* TEST_FUZZ */
1264 			return;
1265 		}
1266 #ifdef CONFIG_FILS
1267 		if (!mic_len &&
1268 		    wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1269 				     &key_data_length) < 0) {
1270 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1271 					"received EAPOL-Key with invalid MIC");
1272 #ifdef TEST_FUZZ
1273 			wpa_printf(MSG_INFO,
1274 				   "TEST: Ignore Key MIC failure for fuzz testing");
1275 			goto continue_fuzz;
1276 #endif /* TEST_FUZZ */
1277 			return;
1278 		}
1279 #endif /* CONFIG_FILS */
1280 #ifdef TEST_FUZZ
1281 	continue_fuzz:
1282 #endif /* TEST_FUZZ */
1283 		sm->MICVerified = TRUE;
1284 		eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
1285 		sm->pending_1_of_4_timeout = 0;
1286 	}
1287 
1288 	if (key_info & WPA_KEY_INFO_REQUEST) {
1289 		if (sm->MICVerified) {
1290 			sm->req_replay_counter_used = 1;
1291 			os_memcpy(sm->req_replay_counter, key->replay_counter,
1292 				  WPA_REPLAY_COUNTER_LEN);
1293 		} else {
1294 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1295 					"received EAPOL-Key request with "
1296 					"invalid MIC");
1297 			return;
1298 		}
1299 
1300 		/*
1301 		 * TODO: should decrypt key data field if encryption was used;
1302 		 * even though MAC address KDE is not normally encrypted,
1303 		 * supplicant is allowed to encrypt it.
1304 		 */
1305 		if (key_info & WPA_KEY_INFO_ERROR) {
1306 			if (wpa_receive_error_report(
1307 				    wpa_auth, sm,
1308 				    !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1309 				return; /* STA entry was removed */
1310 		} else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1311 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1312 					"received EAPOL-Key Request for new "
1313 					"4-Way Handshake");
1314 			wpa_request_new_ptk(sm);
1315 		} else if (key_data_length > 0 &&
1316 			   wpa_parse_kde_ies(key_data, key_data_length,
1317 					     &kde) == 0 &&
1318 			   kde.mac_addr) {
1319 		} else {
1320 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1321 					"received EAPOL-Key Request for GTK "
1322 					"rekeying");
1323 			eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1324 			wpa_rekey_gtk(wpa_auth, NULL);
1325 		}
1326 	} else {
1327 		/* Do not allow the same key replay counter to be reused. */
1328 		wpa_replay_counter_mark_invalid(sm->key_replay,
1329 						key->replay_counter);
1330 
1331 		if (msg == PAIRWISE_2) {
1332 			/*
1333 			 * Maintain a copy of the pending EAPOL-Key frames in
1334 			 * case the EAPOL-Key frame was retransmitted. This is
1335 			 * needed to allow EAPOL-Key msg 2/4 reply to another
1336 			 * pending msg 1/4 to update the SNonce to work around
1337 			 * unexpected supplicant behavior.
1338 			 */
1339 			os_memcpy(sm->prev_key_replay, sm->key_replay,
1340 				  sizeof(sm->key_replay));
1341 		} else {
1342 			os_memset(sm->prev_key_replay, 0,
1343 				  sizeof(sm->prev_key_replay));
1344 		}
1345 
1346 		/*
1347 		 * Make sure old valid counters are not accepted anymore and
1348 		 * do not get copied again.
1349 		 */
1350 		wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
1351 	}
1352 
1353 	os_free(sm->last_rx_eapol_key);
1354 	sm->last_rx_eapol_key = os_memdup(data, data_len);
1355 	if (sm->last_rx_eapol_key == NULL)
1356 		return;
1357 	sm->last_rx_eapol_key_len = data_len;
1358 
1359 	sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
1360 	sm->EAPOLKeyReceived = TRUE;
1361 	sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1362 	sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1363 	os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1364 	wpa_sm_step(sm);
1365 }
1366 
1367 
1368 static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1369 			  const u8 *gnonce, u8 *gtk, size_t gtk_len)
1370 {
1371 	u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN];
1372 	u8 *pos;
1373 	int ret = 0;
1374 
1375 	/* GTK = PRF-X(GMK, "Group key expansion",
1376 	 *	AA || GNonce || Time || random data)
1377 	 * The example described in the IEEE 802.11 standard uses only AA and
1378 	 * GNonce as inputs here. Add some more entropy since this derivation
1379 	 * is done only at the Authenticator and as such, does not need to be
1380 	 * exactly same.
1381 	 */
1382 	os_memset(data, 0, sizeof(data));
1383 	os_memcpy(data, addr, ETH_ALEN);
1384 	os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1385 	pos = data + ETH_ALEN + WPA_NONCE_LEN;
1386 	wpa_get_ntp_timestamp(pos);
1387 #ifdef TEST_FUZZ
1388 	os_memset(pos, 0xef, 8);
1389 #endif /* TEST_FUZZ */
1390 	pos += 8;
1391 	if (random_get_bytes(pos, gtk_len) < 0)
1392 		ret = -1;
1393 
1394 #ifdef CONFIG_SHA384
1395 	if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1396 		       gtk, gtk_len) < 0)
1397 		ret = -1;
1398 #else /* CONFIG_SHA384 */
1399 #ifdef CONFIG_SHA256
1400 	if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1401 		       gtk, gtk_len) < 0)
1402 		ret = -1;
1403 #else /* CONFIG_SHA256 */
1404 	if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1405 		     gtk, gtk_len) < 0)
1406 		ret = -1;
1407 #endif /* CONFIG_SHA256 */
1408 #endif /* CONFIG_SHA384 */
1409 
1410 	return ret;
1411 }
1412 
1413 
1414 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1415 {
1416 	struct wpa_authenticator *wpa_auth = eloop_ctx;
1417 	struct wpa_state_machine *sm = timeout_ctx;
1418 
1419 	sm->pending_1_of_4_timeout = 0;
1420 	wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1421 	sm->TimeoutEvt = TRUE;
1422 	wpa_sm_step(sm);
1423 }
1424 
1425 
1426 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1427 		      struct wpa_state_machine *sm, int key_info,
1428 		      const u8 *key_rsc, const u8 *nonce,
1429 		      const u8 *kde, size_t kde_len,
1430 		      int keyidx, int encr, int force_version)
1431 {
1432 	struct ieee802_1x_hdr *hdr;
1433 	struct wpa_eapol_key *key;
1434 	size_t len, mic_len, keyhdrlen;
1435 	int alg;
1436 	int key_data_len, pad_len = 0;
1437 	u8 *buf, *pos;
1438 	int version, pairwise;
1439 	int i;
1440 	u8 *key_mic, *key_data;
1441 
1442 	mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
1443 	keyhdrlen = sizeof(*key) + mic_len + 2;
1444 
1445 	len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
1446 
1447 	if (force_version)
1448 		version = force_version;
1449 	else if (wpa_use_akm_defined(sm->wpa_key_mgmt))
1450 		version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
1451 	else if (wpa_use_cmac(sm->wpa_key_mgmt))
1452 		version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1453 	else if (sm->pairwise != WPA_CIPHER_TKIP)
1454 		version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1455 	else
1456 		version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1457 
1458 	pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1459 
1460 	wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1461 		   "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1462 		   "encr=%d)",
1463 		   version,
1464 		   (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1465 		   (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1466 		   (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1467 		   (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1468 		   pairwise, (unsigned long) kde_len, keyidx, encr);
1469 
1470 	key_data_len = kde_len;
1471 
1472 	if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1473 	     wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
1474 	     version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1475 		pad_len = key_data_len % 8;
1476 		if (pad_len)
1477 			pad_len = 8 - pad_len;
1478 		key_data_len += pad_len + 8;
1479 	}
1480 
1481 	len += key_data_len;
1482 	if (!mic_len && encr)
1483 		len += AES_BLOCK_SIZE;
1484 
1485 	hdr = os_zalloc(len);
1486 	if (hdr == NULL)
1487 		return;
1488 	hdr->version = wpa_auth->conf.eapol_version;
1489 	hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1490 	hdr->length = host_to_be16(len  - sizeof(*hdr));
1491 	key = (struct wpa_eapol_key *) (hdr + 1);
1492 	key_mic = (u8 *) (key + 1);
1493 	key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
1494 
1495 	key->type = sm->wpa == WPA_VERSION_WPA2 ?
1496 		EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1497 	key_info |= version;
1498 	if (encr && sm->wpa == WPA_VERSION_WPA2)
1499 		key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1500 	if (sm->wpa != WPA_VERSION_WPA2)
1501 		key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1502 	WPA_PUT_BE16(key->key_info, key_info);
1503 
1504 	alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1505 	if (sm->wpa == WPA_VERSION_WPA2 && !pairwise)
1506 		WPA_PUT_BE16(key->key_length, 0);
1507 	else
1508 		WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
1509 
1510 	for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1511 		sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1512 		os_memcpy(sm->key_replay[i].counter,
1513 			  sm->key_replay[i - 1].counter,
1514 			  WPA_REPLAY_COUNTER_LEN);
1515 	}
1516 	inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1517 	os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1518 		  WPA_REPLAY_COUNTER_LEN);
1519 	wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1520 		    key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1521 	sm->key_replay[0].valid = TRUE;
1522 
1523 	if (nonce)
1524 		os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1525 
1526 	if (key_rsc)
1527 		os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1528 
1529 	if (kde && !encr) {
1530 		os_memcpy(key_data, kde, kde_len);
1531 		WPA_PUT_BE16(key_mic + mic_len, kde_len);
1532 #ifdef CONFIG_FILS
1533 	} else if (!mic_len && kde) {
1534 		const u8 *aad[1];
1535 		size_t aad_len[1];
1536 
1537 		WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1538 		wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1539 				kde, kde_len);
1540 
1541 		wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1542 				sm->PTK.kek, sm->PTK.kek_len);
1543 		/* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1544 		 * to Key Data (exclusive). */
1545 		aad[0] = (u8 *) hdr;
1546 		aad_len[0] = key_mic + 2 - (u8 *) hdr;
1547 		if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1548 				    1, aad, aad_len, key_mic + 2) < 0) {
1549 			wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1550 			return;
1551 		}
1552 
1553 		wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1554 			    key_mic + 2, AES_BLOCK_SIZE + kde_len);
1555 #endif /* CONFIG_FILS */
1556 	} else if (encr && kde) {
1557 		buf = os_zalloc(key_data_len);
1558 		if (buf == NULL) {
1559 			os_free(hdr);
1560 			return;
1561 		}
1562 		pos = buf;
1563 		os_memcpy(pos, kde, kde_len);
1564 		pos += kde_len;
1565 
1566 		if (pad_len)
1567 			*pos++ = 0xdd;
1568 
1569 		wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1570 				buf, key_data_len);
1571 		if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1572 		    wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
1573 		    version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1574 			wpa_printf(MSG_DEBUG,
1575 				   "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1576 				   (unsigned int) sm->PTK.kek_len);
1577 			if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
1578 				     (key_data_len - 8) / 8, buf, key_data)) {
1579 				os_free(hdr);
1580 				os_free(buf);
1581 				return;
1582 			}
1583 			WPA_PUT_BE16(key_mic + mic_len, key_data_len);
1584 #ifndef CONFIG_NO_RC4
1585 		} else if (sm->PTK.kek_len == 16) {
1586 			u8 ek[32];
1587 
1588 			wpa_printf(MSG_DEBUG,
1589 				   "WPA: Encrypt Key Data using RC4");
1590 			os_memcpy(key->key_iv,
1591 				  sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1592 			inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1593 			os_memcpy(ek, key->key_iv, 16);
1594 			os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
1595 			os_memcpy(key_data, buf, key_data_len);
1596 			rc4_skip(ek, 32, 256, key_data, key_data_len);
1597 			WPA_PUT_BE16(key_mic + mic_len, key_data_len);
1598 #endif /* CONFIG_NO_RC4 */
1599 		} else {
1600 			os_free(hdr);
1601 			os_free(buf);
1602 			return;
1603 		}
1604 		os_free(buf);
1605 	}
1606 
1607 	if (key_info & WPA_KEY_INFO_MIC) {
1608 		if (!sm->PTK_valid || !mic_len) {
1609 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1610 					"PTK not valid when sending EAPOL-Key "
1611 					"frame");
1612 			os_free(hdr);
1613 			return;
1614 		}
1615 
1616 		if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1617 				      sm->wpa_key_mgmt, version,
1618 				      (u8 *) hdr, len, key_mic) < 0) {
1619 			os_free(hdr);
1620 			return;
1621 		}
1622 #ifdef CONFIG_TESTING_OPTIONS
1623 		if (!pairwise &&
1624 		    wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
1625 		    drand48() <
1626 		    wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1627 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1628 					"Corrupting group EAPOL-Key Key MIC");
1629 			key_mic[0]++;
1630 		}
1631 #endif /* CONFIG_TESTING_OPTIONS */
1632 	}
1633 
1634 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1635 			   1);
1636 	wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1637 			    sm->pairwise_set);
1638 	os_free(hdr);
1639 }
1640 
1641 
1642 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1643 			   struct wpa_state_machine *sm, int key_info,
1644 			   const u8 *key_rsc, const u8 *nonce,
1645 			   const u8 *kde, size_t kde_len,
1646 			   int keyidx, int encr)
1647 {
1648 	int timeout_ms;
1649 	int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1650 	u32 ctr;
1651 
1652 	if (sm == NULL)
1653 		return;
1654 
1655 	__wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1656 			 keyidx, encr, 0);
1657 
1658 	ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1659 	if (ctr == 1 && wpa_auth->conf.tx_status)
1660 		timeout_ms = pairwise ? eapol_key_timeout_first :
1661 			eapol_key_timeout_first_group;
1662 	else
1663 		timeout_ms = eapol_key_timeout_subseq;
1664 	if (wpa_auth->conf.wpa_disable_eapol_key_retries &&
1665 	    (!pairwise || (key_info & WPA_KEY_INFO_MIC)))
1666 		timeout_ms = eapol_key_timeout_no_retrans;
1667 	if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1668 		sm->pending_1_of_4_timeout = 1;
1669 #ifdef TEST_FUZZ
1670 	timeout_ms = 1;
1671 #endif /* TEST_FUZZ */
1672 	wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1673 		   "counter %u)", timeout_ms, ctr);
1674 	eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1675 			       wpa_send_eapol_timeout, wpa_auth, sm);
1676 }
1677 
1678 
1679 static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1680 			      u8 *data, size_t data_len)
1681 {
1682 	struct ieee802_1x_hdr *hdr;
1683 	struct wpa_eapol_key *key;
1684 	u16 key_info;
1685 	int ret = 0;
1686 	u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
1687 	size_t mic_len = wpa_mic_len(akmp, pmk_len);
1688 
1689 	if (data_len < sizeof(*hdr) + sizeof(*key))
1690 		return -1;
1691 
1692 	hdr = (struct ieee802_1x_hdr *) data;
1693 	key = (struct wpa_eapol_key *) (hdr + 1);
1694 	mic_pos = (u8 *) (key + 1);
1695 	key_info = WPA_GET_BE16(key->key_info);
1696 	os_memcpy(mic, mic_pos, mic_len);
1697 	os_memset(mic_pos, 0, mic_len);
1698 	if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1699 			      key_info & WPA_KEY_INFO_TYPE_MASK,
1700 			      data, data_len, mic_pos) ||
1701 	    os_memcmp_const(mic, mic_pos, mic_len) != 0)
1702 		ret = -1;
1703 	os_memcpy(mic_pos, mic, mic_len);
1704 	return ret;
1705 }
1706 
1707 
1708 void wpa_remove_ptk(struct wpa_state_machine *sm)
1709 {
1710 	sm->PTK_valid = FALSE;
1711 	os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1712 	if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1713 			     0))
1714 		wpa_printf(MSG_DEBUG,
1715 			   "RSN: PTK removal from the driver failed");
1716 	sm->pairwise_set = FALSE;
1717 	eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1718 }
1719 
1720 
1721 int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
1722 {
1723 	int remove_ptk = 1;
1724 
1725 	if (sm == NULL)
1726 		return -1;
1727 
1728 	wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1729 			 "event %d notification", event);
1730 
1731 	switch (event) {
1732 	case WPA_AUTH:
1733 #ifdef CONFIG_MESH
1734 		/* PTKs are derived through AMPE */
1735 		if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1736 			/* not mesh */
1737 			break;
1738 		}
1739 		return 0;
1740 #endif /* CONFIG_MESH */
1741 	case WPA_ASSOC:
1742 		break;
1743 	case WPA_DEAUTH:
1744 	case WPA_DISASSOC:
1745 		sm->DeauthenticationRequest = TRUE;
1746 #ifdef CONFIG_IEEE80211R_AP
1747 		os_memset(sm->PMK, 0, sizeof(sm->PMK));
1748 		sm->pmk_len = 0;
1749 		os_memset(sm->xxkey, 0, sizeof(sm->xxkey));
1750 		sm->xxkey_len = 0;
1751 		os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1));
1752 		sm->pmk_r1_len = 0;
1753 #endif /* CONFIG_IEEE80211R_AP */
1754 		break;
1755 	case WPA_REAUTH:
1756 	case WPA_REAUTH_EAPOL:
1757 		if (!sm->started) {
1758 			/*
1759 			 * When using WPS, we may end up here if the STA
1760 			 * manages to re-associate without the previous STA
1761 			 * entry getting removed. Consequently, we need to make
1762 			 * sure that the WPA state machines gets initialized
1763 			 * properly at this point.
1764 			 */
1765 			wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1766 				   "started - initialize now");
1767 			sm->started = 1;
1768 			sm->Init = TRUE;
1769 			if (wpa_sm_step(sm) == 1)
1770 				return 1; /* should not really happen */
1771 			sm->Init = FALSE;
1772 			sm->AuthenticationRequest = TRUE;
1773 			break;
1774 		}
1775 		if (sm->GUpdateStationKeys) {
1776 			/*
1777 			 * Reauthentication cancels the pending group key
1778 			 * update for this STA.
1779 			 */
1780 			sm->group->GKeyDoneStations--;
1781 			sm->GUpdateStationKeys = FALSE;
1782 			sm->PtkGroupInit = TRUE;
1783 		}
1784 		sm->ReAuthenticationRequest = TRUE;
1785 		break;
1786 	case WPA_ASSOC_FT:
1787 #ifdef CONFIG_IEEE80211R_AP
1788 		wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1789 			   "after association");
1790 		wpa_ft_install_ptk(sm);
1791 
1792 		/* Using FT protocol, not WPA auth state machine */
1793 		sm->ft_completed = 1;
1794 		wpa_auth_set_ptk_rekey_timer(sm);
1795 		return 0;
1796 #else /* CONFIG_IEEE80211R_AP */
1797 		break;
1798 #endif /* CONFIG_IEEE80211R_AP */
1799 	case WPA_ASSOC_FILS:
1800 #ifdef CONFIG_FILS
1801 		wpa_printf(MSG_DEBUG,
1802 			   "FILS: TK configuration after association");
1803 		fils_set_tk(sm);
1804 		sm->fils_completed = 1;
1805 		return 0;
1806 #else /* CONFIG_FILS */
1807 		break;
1808 #endif /* CONFIG_FILS */
1809 	case WPA_DRV_STA_REMOVED:
1810 		sm->tk_already_set = FALSE;
1811 		return 0;
1812 	}
1813 
1814 #ifdef CONFIG_IEEE80211R_AP
1815 	sm->ft_completed = 0;
1816 #endif /* CONFIG_IEEE80211R_AP */
1817 
1818 #ifdef CONFIG_IEEE80211W
1819 	if (sm->mgmt_frame_prot && event == WPA_AUTH)
1820 		remove_ptk = 0;
1821 #endif /* CONFIG_IEEE80211W */
1822 #ifdef CONFIG_FILS
1823 	if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1824 	    (event == WPA_AUTH || event == WPA_ASSOC))
1825 		remove_ptk = 0;
1826 #endif /* CONFIG_FILS */
1827 
1828 	if (remove_ptk) {
1829 		sm->PTK_valid = FALSE;
1830 		os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1831 
1832 		if (event != WPA_REAUTH_EAPOL)
1833 			wpa_remove_ptk(sm);
1834 	}
1835 
1836 	if (sm->in_step_loop) {
1837 		/*
1838 		 * wpa_sm_step() is already running - avoid recursive call to
1839 		 * it by making the existing loop process the new update.
1840 		 */
1841 		sm->changed = TRUE;
1842 		return 0;
1843 	}
1844 	return wpa_sm_step(sm);
1845 }
1846 
1847 
1848 SM_STATE(WPA_PTK, INITIALIZE)
1849 {
1850 	SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1851 	if (sm->Init) {
1852 		/* Init flag is not cleared here, so avoid busy
1853 		 * loop by claiming nothing changed. */
1854 		sm->changed = FALSE;
1855 	}
1856 
1857 	sm->keycount = 0;
1858 	if (sm->GUpdateStationKeys)
1859 		sm->group->GKeyDoneStations--;
1860 	sm->GUpdateStationKeys = FALSE;
1861 	if (sm->wpa == WPA_VERSION_WPA)
1862 		sm->PInitAKeys = FALSE;
1863 	if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1864 	       * Local AA > Remote AA)) */) {
1865 		sm->Pair = TRUE;
1866 	}
1867 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1868 	wpa_remove_ptk(sm);
1869 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1870 	sm->TimeoutCtr = 0;
1871 	if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
1872 	    sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
1873 	    sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
1874 		wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1875 				   WPA_EAPOL_authorized, 0);
1876 	}
1877 }
1878 
1879 
1880 SM_STATE(WPA_PTK, DISCONNECT)
1881 {
1882 	u16 reason = sm->disconnect_reason;
1883 
1884 	SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1885 	sm->Disconnect = FALSE;
1886 	sm->disconnect_reason = 0;
1887 	if (!reason)
1888 		reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1889 	wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
1890 }
1891 
1892 
1893 SM_STATE(WPA_PTK, DISCONNECTED)
1894 {
1895 	SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1896 	sm->DeauthenticationRequest = FALSE;
1897 }
1898 
1899 
1900 SM_STATE(WPA_PTK, AUTHENTICATION)
1901 {
1902 	SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1903 	os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1904 	sm->PTK_valid = FALSE;
1905 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1906 			   1);
1907 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1908 	sm->AuthenticationRequest = FALSE;
1909 }
1910 
1911 
1912 static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1913 				  struct wpa_group *group)
1914 {
1915 	if (group->first_sta_seen)
1916 		return;
1917 	/*
1918 	 * System has run bit further than at the time hostapd was started
1919 	 * potentially very early during boot up. This provides better chances
1920 	 * of collecting more randomness on embedded systems. Re-initialize the
1921 	 * GMK and Counter here to improve their strength if there was not
1922 	 * enough entropy available immediately after system startup.
1923 	 */
1924 	wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1925 		   "station");
1926 	if (random_pool_ready() != 1) {
1927 		wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1928 			   "to proceed - reject first 4-way handshake");
1929 		group->reject_4way_hs_for_entropy = TRUE;
1930 	} else {
1931 		group->first_sta_seen = TRUE;
1932 		group->reject_4way_hs_for_entropy = FALSE;
1933 	}
1934 
1935 	if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1936 	    wpa_gtk_update(wpa_auth, group) < 0 ||
1937 	    wpa_group_config_group_keys(wpa_auth, group) < 0) {
1938 		wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1939 		group->first_sta_seen = FALSE;
1940 		group->reject_4way_hs_for_entropy = TRUE;
1941 	}
1942 }
1943 
1944 
1945 SM_STATE(WPA_PTK, AUTHENTICATION2)
1946 {
1947 	SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1948 
1949 	wpa_group_ensure_init(sm->wpa_auth, sm->group);
1950 	sm->ReAuthenticationRequest = FALSE;
1951 
1952 	/*
1953 	 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1954 	 * ambiguous. The Authenticator state machine uses a counter that is
1955 	 * incremented by one for each 4-way handshake. However, the security
1956 	 * analysis of 4-way handshake points out that unpredictable nonces
1957 	 * help in preventing precomputation attacks. Instead of the state
1958 	 * machine definition, use an unpredictable nonce value here to provide
1959 	 * stronger protection against potential precomputation attacks.
1960 	 */
1961 	if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1962 		wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1963 			   "ANonce.");
1964 		sm->Disconnect = TRUE;
1965 		return;
1966 	}
1967 	wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1968 		    WPA_NONCE_LEN);
1969 	/* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1970 	 * logical place than INITIALIZE since AUTHENTICATION2 can be
1971 	 * re-entered on ReAuthenticationRequest without going through
1972 	 * INITIALIZE. */
1973 	sm->TimeoutCtr = 0;
1974 }
1975 
1976 
1977 static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1978 {
1979 	if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1980 		wpa_printf(MSG_ERROR,
1981 			   "WPA: Failed to get random data for ANonce");
1982 		sm->Disconnect = TRUE;
1983 		return -1;
1984 	}
1985 	wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1986 		    WPA_NONCE_LEN);
1987 	sm->TimeoutCtr = 0;
1988 	return 0;
1989 }
1990 
1991 
1992 SM_STATE(WPA_PTK, INITPMK)
1993 {
1994 	u8 msk[2 * PMK_LEN];
1995 	size_t len = 2 * PMK_LEN;
1996 
1997 	SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1998 #ifdef CONFIG_IEEE80211R_AP
1999 	sm->xxkey_len = 0;
2000 #endif /* CONFIG_IEEE80211R_AP */
2001 	if (sm->pmksa) {
2002 		wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
2003 		os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2004 		sm->pmk_len = sm->pmksa->pmk_len;
2005 #ifdef CONFIG_DPP
2006 	} else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
2007 		wpa_printf(MSG_DEBUG,
2008 			   "DPP: No PMKSA cache entry for STA - reject connection");
2009 		sm->Disconnect = TRUE;
2010 		sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
2011 		return;
2012 #endif /* CONFIG_DPP */
2013 	} else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
2014 		unsigned int pmk_len;
2015 
2016 		if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
2017 			pmk_len = PMK_LEN_SUITE_B_192;
2018 		else
2019 			pmk_len = PMK_LEN;
2020 		wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
2021 			   "(MSK len=%lu PMK len=%u)", (unsigned long) len,
2022 			   pmk_len);
2023 		if (len < pmk_len) {
2024 			wpa_printf(MSG_DEBUG,
2025 				   "WPA: MSK not long enough (%u) to create PMK (%u)",
2026 				   (unsigned int) len, (unsigned int) pmk_len);
2027 			sm->Disconnect = TRUE;
2028 			return;
2029 		}
2030 		os_memcpy(sm->PMK, msk, pmk_len);
2031 		sm->pmk_len = pmk_len;
2032 #ifdef CONFIG_IEEE80211R_AP
2033 		if (len >= 2 * PMK_LEN) {
2034 			if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
2035 				os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN);
2036 				sm->xxkey_len = SHA384_MAC_LEN;
2037 			} else {
2038 				os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
2039 				sm->xxkey_len = PMK_LEN;
2040 			}
2041 		}
2042 #endif /* CONFIG_IEEE80211R_AP */
2043 	} else {
2044 		wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
2045 			   sm->wpa_auth->cb->get_msk);
2046 		sm->Disconnect = TRUE;
2047 		return;
2048 	}
2049 	os_memset(msk, 0, sizeof(msk));
2050 
2051 	sm->req_replay_counter_used = 0;
2052 	/* IEEE 802.11i does not set keyRun to FALSE, but not doing this
2053 	 * will break reauthentication since EAPOL state machines may not be
2054 	 * get into AUTHENTICATING state that clears keyRun before WPA state
2055 	 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
2056 	 * state and takes PMK from the previously used AAA Key. This will
2057 	 * eventually fail in 4-Way Handshake because Supplicant uses PMK
2058 	 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
2059 	 * be good workaround for this issue. */
2060 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
2061 }
2062 
2063 
2064 SM_STATE(WPA_PTK, INITPSK)
2065 {
2066 	const u8 *psk;
2067 	size_t psk_len;
2068 
2069 	SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
2070 	psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
2071 			       &psk_len, NULL);
2072 	if (psk) {
2073 		os_memcpy(sm->PMK, psk, psk_len);
2074 		sm->pmk_len = psk_len;
2075 #ifdef CONFIG_IEEE80211R_AP
2076 		os_memcpy(sm->xxkey, psk, PMK_LEN);
2077 		sm->xxkey_len = PMK_LEN;
2078 #endif /* CONFIG_IEEE80211R_AP */
2079 	}
2080 #ifdef CONFIG_SAE
2081 	if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2082 		wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2083 		os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2084 		sm->pmk_len = sm->pmksa->pmk_len;
2085 #ifdef CONFIG_IEEE80211R_AP
2086 		os_memcpy(sm->xxkey, sm->pmksa->pmk, sm->pmksa->pmk_len);
2087 		sm->xxkey_len = sm->pmksa->pmk_len;
2088 #endif /* CONFIG_IEEE80211R_AP */
2089 	}
2090 #endif /* CONFIG_SAE */
2091 	sm->req_replay_counter_used = 0;
2092 }
2093 
2094 
2095 SM_STATE(WPA_PTK, PTKSTART)
2096 {
2097 	u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2098 	size_t pmkid_len = 0;
2099 
2100 	SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2101 	sm->PTKRequest = FALSE;
2102 	sm->TimeoutEvt = FALSE;
2103 	sm->alt_snonce_valid = FALSE;
2104 
2105 	sm->TimeoutCtr++;
2106 	if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
2107 		/* No point in sending the EAPOL-Key - we will disconnect
2108 		 * immediately following this. */
2109 		return;
2110 	}
2111 
2112 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2113 			"sending 1/4 msg of 4-Way Handshake");
2114 	/*
2115 	 * For infrastructure BSS cases, it is better for the AP not to include
2116 	 * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate
2117 	 * offline search for the passphrase/PSK without having to be able to
2118 	 * capture a 4-way handshake from a STA that has access to the network.
2119 	 *
2120 	 * For IBSS cases, addition of PMKID KDE could be considered even with
2121 	 * WPA2-PSK cases that use multiple PSKs, but only if there is a single
2122 	 * possible PSK for this STA. However, this should not be done unless
2123 	 * there is support for using that information on the supplicant side.
2124 	 * The concern about exposing PMKID unnecessarily in infrastructure BSS
2125 	 * cases would also apply here, but at least in the IBSS case, this
2126 	 * would cover a potential real use case.
2127 	 */
2128 	if (sm->wpa == WPA_VERSION_WPA2 &&
2129 	    (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
2130 	     (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
2131 	     wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
2132 	    sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
2133 		pmkid = buf;
2134 		pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2135 		pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2136 		pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2137 		RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
2138 		if (sm->pmksa) {
2139 			wpa_hexdump(MSG_DEBUG,
2140 				    "RSN: Message 1/4 PMKID from PMKSA entry",
2141 				    sm->pmksa->pmkid, PMKID_LEN);
2142 			os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2143 				  sm->pmksa->pmkid, PMKID_LEN);
2144 		} else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2145 			/* No KCK available to derive PMKID */
2146 			wpa_printf(MSG_DEBUG,
2147 				   "RSN: No KCK available to derive PMKID for message 1/4");
2148 			pmkid = NULL;
2149 #ifdef CONFIG_FILS
2150 		} else if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2151 			if (sm->pmkid_set) {
2152 				wpa_hexdump(MSG_DEBUG,
2153 					    "RSN: Message 1/4 PMKID from FILS/ERP",
2154 					    sm->pmkid, PMKID_LEN);
2155 				os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2156 					  sm->pmkid, PMKID_LEN);
2157 			} else {
2158 				/* No PMKID available */
2159 				wpa_printf(MSG_DEBUG,
2160 					   "RSN: No FILS/ERP PMKID available for message 1/4");
2161 				pmkid = NULL;
2162 			}
2163 #endif /* CONFIG_FILS */
2164 #ifdef CONFIG_IEEE80211R_AP
2165 		} else if (wpa_key_mgmt_ft(sm->wpa_key_mgmt) &&
2166 			   sm->ft_completed) {
2167 			wpa_printf(MSG_DEBUG,
2168 				   "FT: No PMKID in message 1/4 when using FT protocol");
2169 			pmkid = NULL;
2170 			pmkid_len = 0;
2171 #endif /* CONFIG_IEEE80211R_AP */
2172 #ifdef CONFIG_SAE
2173 		} else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2174 			if (sm->pmkid_set) {
2175 				wpa_hexdump(MSG_DEBUG,
2176 					    "RSN: Message 1/4 PMKID from SAE",
2177 					    sm->pmkid, PMKID_LEN);
2178 				os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2179 					  sm->pmkid, PMKID_LEN);
2180 			} else {
2181 				/* No PMKID available */
2182 				wpa_printf(MSG_DEBUG,
2183 					   "RSN: No SAE PMKID available for message 1/4");
2184 				pmkid = NULL;
2185 			}
2186 #endif /* CONFIG_SAE */
2187 		} else {
2188 			/*
2189 			 * Calculate PMKID since no PMKSA cache entry was
2190 			 * available with pre-calculated PMKID.
2191 			 */
2192 			rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
2193 				  sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2194 				  sm->wpa_key_mgmt);
2195 			wpa_hexdump(MSG_DEBUG,
2196 				    "RSN: Message 1/4 PMKID derived from PMK",
2197 				    &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN);
2198 		}
2199 	}
2200 	wpa_send_eapol(sm->wpa_auth, sm,
2201 		       WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2202 		       sm->ANonce, pmkid, pmkid_len, 0, 0);
2203 }
2204 
2205 
2206 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
2207 			  const u8 *pmk, unsigned int pmk_len,
2208 			  struct wpa_ptk *ptk)
2209 {
2210 	const u8 *z = NULL;
2211 	size_t z_len = 0;
2212 
2213 #ifdef CONFIG_IEEE80211R_AP
2214 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2215 		if (sm->ft_completed) {
2216 			u8 ptk_name[WPA_PMK_NAME_LEN];
2217 
2218 			return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len,
2219 						 sm->SNonce, sm->ANonce,
2220 						 sm->addr, sm->wpa_auth->addr,
2221 						 sm->pmk_r1_name,
2222 						 ptk, ptk_name,
2223 						 sm->wpa_key_mgmt,
2224 						 sm->pairwise);
2225 		}
2226 		return wpa_auth_derive_ptk_ft(sm, ptk);
2227 	}
2228 #endif /* CONFIG_IEEE80211R_AP */
2229 
2230 #ifdef CONFIG_DPP2
2231 	if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) {
2232 		z = wpabuf_head(sm->dpp_z);
2233 		z_len = wpabuf_len(sm->dpp_z);
2234 	}
2235 #endif /* CONFIG_DPP2 */
2236 
2237 	return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
2238 			      sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2239 			      ptk, sm->wpa_key_mgmt, sm->pairwise, z, z_len);
2240 }
2241 
2242 
2243 #ifdef CONFIG_FILS
2244 
2245 int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
2246 			 size_t pmk_len, const u8 *snonce, const u8 *anonce,
2247 			 const u8 *dhss, size_t dhss_len,
2248 			 struct wpabuf *g_sta, struct wpabuf *g_ap)
2249 {
2250 	u8 ick[FILS_ICK_MAX_LEN];
2251 	size_t ick_len;
2252 	int res;
2253 	u8 fils_ft[FILS_FT_MAX_LEN];
2254 	size_t fils_ft_len = 0;
2255 
2256 	res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
2257 			      snonce, anonce, dhss, dhss_len,
2258 			      &sm->PTK, ick, &ick_len,
2259 			      sm->wpa_key_mgmt, sm->pairwise,
2260 			      fils_ft, &fils_ft_len);
2261 	if (res < 0)
2262 		return res;
2263 	sm->PTK_valid = TRUE;
2264 	sm->tk_already_set = FALSE;
2265 
2266 #ifdef CONFIG_IEEE80211R_AP
2267 	if (fils_ft_len) {
2268 		struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2269 		struct wpa_auth_config *conf = &wpa_auth->conf;
2270 		u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2271 		int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2272 		size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
2273 
2274 		if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2275 				      conf->ssid, conf->ssid_len,
2276 				      conf->mobility_domain,
2277 				      conf->r0_key_holder,
2278 				      conf->r0_key_holder_len,
2279 				      sm->addr, pmk_r0, pmk_r0_name,
2280 				      use_sha384) < 0)
2281 			return -1;
2282 
2283 		wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
2284 				pmk_r0, pmk_r0_len);
2285 		wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2286 			    pmk_r0_name, WPA_PMK_NAME_LEN);
2287 		wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name);
2288 		os_memset(fils_ft, 0, sizeof(fils_ft));
2289 
2290 		res = wpa_derive_pmk_r1_name(pmk_r0_name, conf->r1_key_holder,
2291 					     sm->addr, sm->pmk_r1_name,
2292 					     use_sha384);
2293 		os_memset(pmk_r0, 0, PMK_LEN_MAX);
2294 		if (res < 0)
2295 			return -1;
2296 		wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name,
2297 			    WPA_PMK_NAME_LEN);
2298 		sm->pmk_r1_name_valid = 1;
2299 	}
2300 #endif /* CONFIG_IEEE80211R_AP */
2301 
2302 	res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2303 			       sm->addr, sm->wpa_auth->addr,
2304 			       g_sta ? wpabuf_head(g_sta) : NULL,
2305 			       g_sta ? wpabuf_len(g_sta) : 0,
2306 			       g_ap ? wpabuf_head(g_ap) : NULL,
2307 			       g_ap ? wpabuf_len(g_ap) : 0,
2308 			       sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2309 			       sm->fils_key_auth_ap,
2310 			       &sm->fils_key_auth_len);
2311 	os_memset(ick, 0, sizeof(ick));
2312 
2313 	/* Store nonces for (Re)Association Request/Response frame processing */
2314 	os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2315 	os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2316 
2317 	return res;
2318 }
2319 
2320 
2321 static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
2322 			    u8 *buf, size_t buf_len, u16 *_key_data_len)
2323 {
2324 	struct ieee802_1x_hdr *hdr;
2325 	struct wpa_eapol_key *key;
2326 	u8 *pos;
2327 	u16 key_data_len;
2328 	u8 *tmp;
2329 	const u8 *aad[1];
2330 	size_t aad_len[1];
2331 
2332 	hdr = (struct ieee802_1x_hdr *) buf;
2333 	key = (struct wpa_eapol_key *) (hdr + 1);
2334 	pos = (u8 *) (key + 1);
2335 	key_data_len = WPA_GET_BE16(pos);
2336 	if (key_data_len < AES_BLOCK_SIZE ||
2337 	    key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2338 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2339 				"No room for AES-SIV data in the frame");
2340 		return -1;
2341 	}
2342 	pos += 2; /* Pointing at the Encrypted Key Data field */
2343 
2344 	tmp = os_malloc(key_data_len);
2345 	if (!tmp)
2346 		return -1;
2347 
2348 	/* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2349 	 * to Key Data (exclusive). */
2350 	aad[0] = buf;
2351 	aad_len[0] = pos - buf;
2352 	if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2353 			    1, aad, aad_len, tmp) < 0) {
2354 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2355 				"Invalid AES-SIV data in the frame");
2356 		bin_clear_free(tmp, key_data_len);
2357 		return -1;
2358 	}
2359 
2360 	/* AEAD decryption and validation completed successfully */
2361 	key_data_len -= AES_BLOCK_SIZE;
2362 	wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2363 			tmp, key_data_len);
2364 
2365 	/* Replace Key Data field with the decrypted version */
2366 	os_memcpy(pos, tmp, key_data_len);
2367 	pos -= 2; /* Key Data Length field */
2368 	WPA_PUT_BE16(pos, key_data_len);
2369 	bin_clear_free(tmp, key_data_len);
2370 	if (_key_data_len)
2371 		*_key_data_len = key_data_len;
2372 	return 0;
2373 }
2374 
2375 
2376 const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2377 					  const u8 *ies, size_t ies_len,
2378 					  const u8 *fils_session)
2379 {
2380 	const u8 *ie, *end;
2381 	const u8 *session = NULL;
2382 
2383 	if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2384 		wpa_printf(MSG_DEBUG,
2385 			   "FILS: Not a FILS AKM - reject association");
2386 		return NULL;
2387 	}
2388 
2389 	/* Verify Session element */
2390 	ie = ies;
2391 	end = ((const u8 *) ie) + ies_len;
2392 	while (ie + 1 < end) {
2393 		if (ie + 2 + ie[1] > end)
2394 			break;
2395 		if (ie[0] == WLAN_EID_EXTENSION &&
2396 		    ie[1] >= 1 + FILS_SESSION_LEN &&
2397 		    ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2398 			session = ie;
2399 			break;
2400 		}
2401 		ie += 2 + ie[1];
2402 	}
2403 
2404 	if (!session) {
2405 		wpa_printf(MSG_DEBUG,
2406 			   "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2407 			   __func__);
2408 		return NULL;
2409 	}
2410 
2411 	if (!fils_session) {
2412 		wpa_printf(MSG_DEBUG,
2413 			   "FILS: %s: Could not find FILS Session element in STA entry - reject",
2414 			   __func__);
2415 		return NULL;
2416 	}
2417 
2418 	if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2419 		wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2420 		wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2421 			    fils_session, FILS_SESSION_LEN);
2422 		wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2423 			    session + 3, FILS_SESSION_LEN);
2424 		return NULL;
2425 	}
2426 	return session;
2427 }
2428 
2429 
2430 int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2431 				  size_t ies_len)
2432 {
2433 	struct ieee802_11_elems elems;
2434 
2435 	if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2436 		wpa_printf(MSG_DEBUG,
2437 			   "FILS: Failed to parse decrypted elements");
2438 		return -1;
2439 	}
2440 
2441 	if (!elems.fils_session) {
2442 		wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2443 		return -1;
2444 	}
2445 
2446 	if (!elems.fils_key_confirm) {
2447 		wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2448 		return -1;
2449 	}
2450 
2451 	if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2452 		wpa_printf(MSG_DEBUG,
2453 			   "FILS: Unexpected Key-Auth length %d (expected %d)",
2454 			   elems.fils_key_confirm_len,
2455 			   (int) sm->fils_key_auth_len);
2456 		return -1;
2457 	}
2458 
2459 	if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2460 		      sm->fils_key_auth_len) != 0) {
2461 		wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2462 		wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2463 			    elems.fils_key_confirm, elems.fils_key_confirm_len);
2464 		wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2465 			    sm->fils_key_auth_sta, sm->fils_key_auth_len);
2466 		return -1;
2467 	}
2468 
2469 	return 0;
2470 }
2471 
2472 
2473 int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2474 		       const struct ieee80211_mgmt *mgmt, size_t frame_len,
2475 		       u8 *pos, size_t left)
2476 {
2477 	u16 fc, stype;
2478 	const u8 *end, *ie_start, *ie, *session, *crypt;
2479 	const u8 *aad[5];
2480 	size_t aad_len[5];
2481 
2482 	if (!sm || !sm->PTK_valid) {
2483 		wpa_printf(MSG_DEBUG,
2484 			   "FILS: No KEK to decrypt Assocication Request frame");
2485 		return -1;
2486 	}
2487 
2488 	if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2489 		wpa_printf(MSG_DEBUG,
2490 			   "FILS: Not a FILS AKM - reject association");
2491 		return -1;
2492 	}
2493 
2494 	end = ((const u8 *) mgmt) + frame_len;
2495 	fc = le_to_host16(mgmt->frame_control);
2496 	stype = WLAN_FC_GET_STYPE(fc);
2497 	if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2498 		ie_start = mgmt->u.reassoc_req.variable;
2499 	else
2500 		ie_start = mgmt->u.assoc_req.variable;
2501 	ie = ie_start;
2502 
2503 	/*
2504 	 * Find FILS Session element which is the last unencrypted element in
2505 	 * the frame.
2506 	 */
2507 	session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2508 						 fils_session);
2509 	if (!session) {
2510 		wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
2511 		return -1;
2512 	}
2513 
2514 	crypt = session + 2 + session[1];
2515 
2516 	if (end - crypt < AES_BLOCK_SIZE) {
2517 		wpa_printf(MSG_DEBUG,
2518 			   "FILS: Too short frame to include AES-SIV data");
2519 		return -1;
2520 	}
2521 
2522 	/* AES-SIV AAD vectors */
2523 
2524 	/* The STA's MAC address */
2525 	aad[0] = mgmt->sa;
2526 	aad_len[0] = ETH_ALEN;
2527 	/* The AP's BSSID */
2528 	aad[1] = mgmt->da;
2529 	aad_len[1] = ETH_ALEN;
2530 	/* The STA's nonce */
2531 	aad[2] = sm->SNonce;
2532 	aad_len[2] = FILS_NONCE_LEN;
2533 	/* The AP's nonce */
2534 	aad[3] = sm->ANonce;
2535 	aad_len[3] = FILS_NONCE_LEN;
2536 	/*
2537 	 * The (Re)Association Request frame from the Capability Information
2538 	 * field to the FILS Session element (both inclusive).
2539 	 */
2540 	aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
2541 	aad_len[4] = crypt - aad[4];
2542 
2543 	if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
2544 			    5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
2545 		wpa_printf(MSG_DEBUG,
2546 			   "FILS: Invalid AES-SIV data in the frame");
2547 		return -1;
2548 	}
2549 	wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2550 		    pos, left - AES_BLOCK_SIZE);
2551 
2552 	if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2553 		wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
2554 		return -1;
2555 	}
2556 
2557 	return left - AES_BLOCK_SIZE;
2558 }
2559 
2560 
2561 int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
2562 		       size_t current_len, size_t max_len,
2563 		       const struct wpabuf *hlp)
2564 {
2565 	u8 *end = buf + max_len;
2566 	u8 *pos = buf + current_len;
2567 	struct ieee80211_mgmt *mgmt;
2568 	struct wpabuf *plain;
2569 	const u8 *aad[5];
2570 	size_t aad_len[5];
2571 
2572 	if (!sm || !sm->PTK_valid)
2573 		return -1;
2574 
2575 	wpa_hexdump(MSG_DEBUG,
2576 		    "FILS: Association Response frame before FILS processing",
2577 		    buf, current_len);
2578 
2579 	mgmt = (struct ieee80211_mgmt *) buf;
2580 
2581 	/* AES-SIV AAD vectors */
2582 
2583 	/* The AP's BSSID */
2584 	aad[0] = mgmt->sa;
2585 	aad_len[0] = ETH_ALEN;
2586 	/* The STA's MAC address */
2587 	aad[1] = mgmt->da;
2588 	aad_len[1] = ETH_ALEN;
2589 	/* The AP's nonce */
2590 	aad[2] = sm->ANonce;
2591 	aad_len[2] = FILS_NONCE_LEN;
2592 	/* The STA's nonce */
2593 	aad[3] = sm->SNonce;
2594 	aad_len[3] = FILS_NONCE_LEN;
2595 	/*
2596 	 * The (Re)Association Response frame from the Capability Information
2597 	 * field (the same offset in both Association and Reassociation
2598 	 * Response frames) to the FILS Session element (both inclusive).
2599 	 */
2600 	aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2601 	aad_len[4] = pos - aad[4];
2602 
2603 	/* The following elements will be encrypted with AES-SIV */
2604 	plain = fils_prepare_plainbuf(sm, hlp);
2605 	if (!plain) {
2606 		wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2607 		return -1;
2608 	}
2609 
2610 	if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2611 		wpa_printf(MSG_DEBUG,
2612 			   "FILS: Not enough room for FILS elements");
2613 		wpabuf_free(plain);
2614 		return -1;
2615 	}
2616 
2617 	wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2618 			    plain);
2619 
2620 	if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2621 			    wpabuf_head(plain), wpabuf_len(plain),
2622 			    5, aad, aad_len, pos) < 0) {
2623 		wpabuf_free(plain);
2624 		return -1;
2625 	}
2626 
2627 	wpa_hexdump(MSG_DEBUG,
2628 		    "FILS: Encrypted Association Response elements",
2629 		    pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2630 	current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2631 	wpabuf_free(plain);
2632 
2633 	sm->fils_completed = 1;
2634 
2635 	return current_len;
2636 }
2637 
2638 
2639 static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2640 					     const struct wpabuf *hlp)
2641 {
2642 	struct wpabuf *plain;
2643 	u8 *len, *tmp, *tmp2;
2644 	u8 hdr[2];
2645 	u8 *gtk, dummy_gtk[32];
2646 	size_t gtk_len;
2647 	struct wpa_group *gsm;
2648 
2649 	plain = wpabuf_alloc(1000);
2650 	if (!plain)
2651 		return NULL;
2652 
2653 	/* TODO: FILS Public Key */
2654 
2655 	/* FILS Key Confirmation */
2656 	wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2657 	wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2658 	/* Element ID Extension */
2659 	wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2660 	wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2661 
2662 	/* FILS HLP Container */
2663 	if (hlp)
2664 		wpabuf_put_buf(plain, hlp);
2665 
2666 	/* TODO: FILS IP Address Assignment */
2667 
2668 	/* Key Delivery */
2669 	gsm = sm->group;
2670 	wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2671 	len = wpabuf_put(plain, 1);
2672 	wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2673 	wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2674 			    wpabuf_put(plain, WPA_KEY_RSC_LEN));
2675 	/* GTK KDE */
2676 	gtk = gsm->GTK[gsm->GN - 1];
2677 	gtk_len = gsm->GTK_len;
2678 	if (sm->wpa_auth->conf.disable_gtk ||
2679 	    sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
2680 		/*
2681 		 * Provide unique random GTK to each STA to prevent use
2682 		 * of GTK in the BSS.
2683 		 */
2684 		if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2685 			wpabuf_free(plain);
2686 			return NULL;
2687 		}
2688 		gtk = dummy_gtk;
2689 	}
2690 	hdr[0] = gsm->GN & 0x03;
2691 	hdr[1] = 0;
2692 	tmp = wpabuf_put(plain, 0);
2693 	tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2694 			   gtk, gtk_len);
2695 	wpabuf_put(plain, tmp2 - tmp);
2696 
2697 	/* IGTK KDE */
2698 	tmp = wpabuf_put(plain, 0);
2699 	tmp2 = ieee80211w_kde_add(sm, tmp);
2700 	wpabuf_put(plain, tmp2 - tmp);
2701 
2702 	*len = (u8 *) wpabuf_put(plain, 0) - len - 1;
2703 
2704 #ifdef CONFIG_OCV
2705 	if (wpa_auth_uses_ocv(sm)) {
2706 		struct wpa_channel_info ci;
2707 		u8 *pos;
2708 
2709 		if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2710 			wpa_printf(MSG_WARNING,
2711 				   "FILS: Failed to get channel info for OCI element");
2712 			wpabuf_free(plain);
2713 			return NULL;
2714 		}
2715 
2716 		pos = wpabuf_put(plain, OCV_OCI_EXTENDED_LEN);
2717 		if (ocv_insert_extended_oci(&ci, pos) < 0) {
2718 			wpabuf_free(plain);
2719 			return NULL;
2720 		}
2721 	}
2722 #endif /* CONFIG_OCV */
2723 
2724 	return plain;
2725 }
2726 
2727 
2728 int fils_set_tk(struct wpa_state_machine *sm)
2729 {
2730 	enum wpa_alg alg;
2731 	int klen;
2732 
2733 	if (!sm || !sm->PTK_valid) {
2734 		wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK");
2735 		return -1;
2736 	}
2737 	if (sm->tk_already_set) {
2738 		wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver");
2739 		return -1;
2740 	}
2741 
2742 	alg = wpa_cipher_to_alg(sm->pairwise);
2743 	klen = wpa_cipher_key_len(sm->pairwise);
2744 
2745 	wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2746 	if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2747 			     sm->PTK.tk, klen)) {
2748 		wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2749 		return -1;
2750 	}
2751 	sm->tk_already_set = TRUE;
2752 
2753 	return 0;
2754 }
2755 
2756 
2757 u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
2758 				    const u8 *fils_session, struct wpabuf *hlp)
2759 {
2760 	struct wpabuf *plain;
2761 	u8 *pos = buf;
2762 
2763 	/* FILS Session */
2764 	*pos++ = WLAN_EID_EXTENSION; /* Element ID */
2765 	*pos++ = 1 + FILS_SESSION_LEN; /* Length */
2766 	*pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2767 	os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2768 	pos += FILS_SESSION_LEN;
2769 
2770 	plain = fils_prepare_plainbuf(sm, hlp);
2771 	if (!plain) {
2772 		wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2773 		return NULL;
2774 	}
2775 
2776 	os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2777 	pos += wpabuf_len(plain);
2778 
2779 	wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2780 		   (unsigned int) wpabuf_len(plain));
2781 	wpabuf_free(plain);
2782 	sm->fils_completed = 1;
2783 	return pos;
2784 }
2785 
2786 #endif /* CONFIG_FILS */
2787 
2788 
2789 #ifdef CONFIG_OCV
2790 int get_sta_tx_parameters(struct wpa_state_machine *sm, int ap_max_chanwidth,
2791 			  int ap_seg1_idx, int *bandwidth, int *seg1_idx)
2792 {
2793 	struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2794 
2795 	if (!wpa_auth->cb->get_sta_tx_params)
2796 		return -1;
2797 	return wpa_auth->cb->get_sta_tx_params(wpa_auth->cb_ctx, sm->addr,
2798 					       ap_max_chanwidth, ap_seg1_idx,
2799 					       bandwidth, seg1_idx);
2800 }
2801 #endif /* CONFIG_OCV */
2802 
2803 
2804 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2805 {
2806 	struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2807 	struct wpa_ptk PTK;
2808 	int ok = 0, psk_found = 0;
2809 	const u8 *pmk = NULL;
2810 	size_t pmk_len;
2811 	int ft;
2812 	const u8 *eapol_key_ie, *key_data, *mic;
2813 	u16 key_data_length;
2814 	size_t mic_len, eapol_key_ie_len;
2815 	struct ieee802_1x_hdr *hdr;
2816 	struct wpa_eapol_key *key;
2817 	struct wpa_eapol_ie_parse kde;
2818 	int vlan_id = 0;
2819 
2820 	SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2821 	sm->EAPOLKeyReceived = FALSE;
2822 	sm->update_snonce = FALSE;
2823 	os_memset(&PTK, 0, sizeof(PTK));
2824 
2825 	mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
2826 
2827 	/* WPA with IEEE 802.1X: use the derived PMK from EAP
2828 	 * WPA-PSK: iterate through possible PSKs and select the one matching
2829 	 * the packet */
2830 	for (;;) {
2831 		if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2832 		    !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2833 			pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2834 					       sm->p2p_dev_addr, pmk, &pmk_len,
2835 					       &vlan_id);
2836 			if (pmk == NULL)
2837 				break;
2838 			psk_found = 1;
2839 #ifdef CONFIG_IEEE80211R_AP
2840 			if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2841 				os_memcpy(sm->xxkey, pmk, pmk_len);
2842 				sm->xxkey_len = pmk_len;
2843 			}
2844 #endif /* CONFIG_IEEE80211R_AP */
2845 		} else {
2846 			pmk = sm->PMK;
2847 			pmk_len = sm->pmk_len;
2848 		}
2849 
2850 		if ((!pmk || !pmk_len) && sm->pmksa) {
2851 			wpa_printf(MSG_DEBUG, "WPA: Use PMK from PMKSA cache");
2852 			pmk = sm->pmksa->pmk;
2853 			pmk_len = sm->pmksa->pmk_len;
2854 		}
2855 
2856 		if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2857 			break;
2858 
2859 		if (mic_len &&
2860 		    wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
2861 				       sm->last_rx_eapol_key,
2862 				       sm->last_rx_eapol_key_len) == 0) {
2863 			if (sm->PMK != pmk) {
2864 				os_memcpy(sm->PMK, pmk, pmk_len);
2865 				sm->pmk_len = pmk_len;
2866 			}
2867 			ok = 1;
2868 			break;
2869 		}
2870 
2871 #ifdef CONFIG_FILS
2872 		if (!mic_len &&
2873 		    wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2874 				     sm->last_rx_eapol_key_len, NULL) == 0) {
2875 			ok = 1;
2876 			break;
2877 		}
2878 #endif /* CONFIG_FILS */
2879 
2880 		if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
2881 		    wpa_key_mgmt_sae(sm->wpa_key_mgmt))
2882 			break;
2883 	}
2884 
2885 	if (!ok) {
2886 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2887 				"invalid MIC in msg 2/4 of 4-Way Handshake");
2888 		if (psk_found)
2889 			wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
2890 		return;
2891 	}
2892 
2893 	/*
2894 	 * Note: last_rx_eapol_key length fields have already been validated in
2895 	 * wpa_receive().
2896 	 */
2897 	hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2898 	key = (struct wpa_eapol_key *) (hdr + 1);
2899 	mic = (u8 *) (key + 1);
2900 	key_data = mic + mic_len + 2;
2901 	key_data_length = WPA_GET_BE16(mic + mic_len);
2902 	if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2903 	    sizeof(*key) - mic_len - 2)
2904 		return;
2905 
2906 	if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2907 		wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2908 				 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2909 		return;
2910 	}
2911 	if (kde.rsn_ie) {
2912 		eapol_key_ie = kde.rsn_ie;
2913 		eapol_key_ie_len = kde.rsn_ie_len;
2914 	} else if (kde.osen) {
2915 		eapol_key_ie = kde.osen;
2916 		eapol_key_ie_len = kde.osen_len;
2917 	} else {
2918 		eapol_key_ie = kde.wpa_ie;
2919 		eapol_key_ie_len = kde.wpa_ie_len;
2920 	}
2921 	ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2922 	if (sm->wpa_ie == NULL ||
2923 	    wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2924 			       eapol_key_ie, eapol_key_ie_len)) {
2925 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2926 				"WPA IE from (Re)AssocReq did not match with msg 2/4");
2927 		if (sm->wpa_ie) {
2928 			wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2929 				    sm->wpa_ie, sm->wpa_ie_len);
2930 		}
2931 		wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2932 			    eapol_key_ie, eapol_key_ie_len);
2933 		/* MLME-DEAUTHENTICATE.request */
2934 		wpa_sta_disconnect(wpa_auth, sm->addr,
2935 				   WLAN_REASON_PREV_AUTH_NOT_VALID);
2936 		return;
2937 	}
2938 #ifdef CONFIG_OCV
2939 	if (wpa_auth_uses_ocv(sm)) {
2940 		struct wpa_channel_info ci;
2941 		int tx_chanwidth;
2942 		int tx_seg1_idx;
2943 
2944 		if (wpa_channel_info(wpa_auth, &ci) != 0) {
2945 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2946 					"Failed to get channel info to validate received OCI in EAPOL-Key 2/4");
2947 			return;
2948 		}
2949 
2950 		if (get_sta_tx_parameters(sm,
2951 					  channel_width_to_int(ci.chanwidth),
2952 					  ci.seg1_idx, &tx_chanwidth,
2953 					  &tx_seg1_idx) < 0)
2954 			return;
2955 
2956 		if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
2957 					 tx_chanwidth, tx_seg1_idx) != 0) {
2958 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2959 					ocv_errorstr);
2960 			return;
2961 		}
2962 	}
2963 #endif /* CONFIG_OCV */
2964 #ifdef CONFIG_IEEE80211R_AP
2965 	if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
2966 		wpa_sta_disconnect(wpa_auth, sm->addr,
2967 				   WLAN_REASON_PREV_AUTH_NOT_VALID);
2968 		return;
2969 	}
2970 #endif /* CONFIG_IEEE80211R_AP */
2971 #ifdef CONFIG_P2P
2972 	if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2973 	    wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2974 		int idx;
2975 		wpa_printf(MSG_DEBUG,
2976 			   "P2P: IP address requested in EAPOL-Key exchange");
2977 		idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2978 		if (idx >= 0) {
2979 			u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2980 			bitfield_set(wpa_auth->ip_pool, idx);
2981 			WPA_PUT_BE32(sm->ip_addr, start + idx);
2982 			wpa_printf(MSG_DEBUG,
2983 				   "P2P: Assigned IP address %u.%u.%u.%u to "
2984 				   MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2985 				   sm->ip_addr[2], sm->ip_addr[3],
2986 				   MAC2STR(sm->addr));
2987 		}
2988 	}
2989 #endif /* CONFIG_P2P */
2990 
2991 #ifdef CONFIG_IEEE80211R_AP
2992 	if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2993 		/*
2994 		 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2995 		 * with the value we derived.
2996 		 */
2997 		if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2998 				    WPA_PMK_NAME_LEN) != 0) {
2999 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3000 					"PMKR1Name mismatch in FT 4-way "
3001 					"handshake");
3002 			wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
3003 				    "Supplicant",
3004 				    sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
3005 			wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
3006 				    sm->pmk_r1_name, WPA_PMK_NAME_LEN);
3007 			return;
3008 		}
3009 	}
3010 #endif /* CONFIG_IEEE80211R_AP */
3011 
3012 	if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
3013 	    wpa_auth_update_vlan(wpa_auth, sm->addr, vlan_id) < 0) {
3014 		wpa_sta_disconnect(wpa_auth, sm->addr,
3015 				   WLAN_REASON_PREV_AUTH_NOT_VALID);
3016 		return;
3017 	}
3018 
3019 	sm->pending_1_of_4_timeout = 0;
3020 	eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
3021 
3022 	if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
3023 		/* PSK may have changed from the previous choice, so update
3024 		 * state machine data based on whatever PSK was selected here.
3025 		 */
3026 		os_memcpy(sm->PMK, pmk, PMK_LEN);
3027 		sm->pmk_len = PMK_LEN;
3028 	}
3029 
3030 	sm->MICVerified = TRUE;
3031 
3032 	os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
3033 	sm->PTK_valid = TRUE;
3034 }
3035 
3036 
3037 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
3038 {
3039 	SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
3040 	sm->TimeoutCtr = 0;
3041 }
3042 
3043 
3044 #ifdef CONFIG_IEEE80211W
3045 
3046 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
3047 {
3048 	if (sm->mgmt_frame_prot) {
3049 		size_t len;
3050 		len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3051 		return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
3052 	}
3053 
3054 	return 0;
3055 }
3056 
3057 
3058 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
3059 {
3060 	struct wpa_igtk_kde igtk;
3061 	struct wpa_group *gsm = sm->group;
3062 	u8 rsc[WPA_KEY_RSC_LEN];
3063 	size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3064 
3065 	if (!sm->mgmt_frame_prot)
3066 		return pos;
3067 
3068 	igtk.keyid[0] = gsm->GN_igtk;
3069 	igtk.keyid[1] = 0;
3070 	if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
3071 	    wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
3072 		os_memset(igtk.pn, 0, sizeof(igtk.pn));
3073 	else
3074 		os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
3075 	os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
3076 	if (sm->wpa_auth->conf.disable_gtk ||
3077 	    sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
3078 		/*
3079 		 * Provide unique random IGTK to each STA to prevent use of
3080 		 * IGTK in the BSS.
3081 		 */
3082 		if (random_get_bytes(igtk.igtk, len) < 0)
3083 			return pos;
3084 	}
3085 	pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
3086 			  (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
3087 			  NULL, 0);
3088 
3089 	return pos;
3090 }
3091 
3092 #else /* CONFIG_IEEE80211W */
3093 
3094 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
3095 {
3096 	return 0;
3097 }
3098 
3099 
3100 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
3101 {
3102 	return pos;
3103 }
3104 
3105 #endif /* CONFIG_IEEE80211W */
3106 
3107 
3108 static int ocv_oci_len(struct wpa_state_machine *sm)
3109 {
3110 #ifdef CONFIG_OCV
3111 	if (wpa_auth_uses_ocv(sm))
3112 		return OCV_OCI_KDE_LEN;
3113 #endif /* CONFIG_OCV */
3114 	return 0;
3115 }
3116 
3117 static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos)
3118 {
3119 #ifdef CONFIG_OCV
3120 	struct wpa_channel_info ci;
3121 
3122 	if (!wpa_auth_uses_ocv(sm))
3123 		return 0;
3124 
3125 	if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3126 		wpa_printf(MSG_WARNING,
3127 			   "Failed to get channel info for OCI element");
3128 		return -1;
3129 	}
3130 
3131 	return ocv_insert_oci_kde(&ci, argpos);
3132 #else /* CONFIG_OCV */
3133 	return 0;
3134 #endif /* CONFIG_OCV */
3135 }
3136 
3137 
3138 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
3139 {
3140 	u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
3141 	size_t gtk_len, kde_len;
3142 	struct wpa_group *gsm = sm->group;
3143 	u8 *wpa_ie;
3144 	int wpa_ie_len, secure, keyidx, encr = 0;
3145 
3146 	SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
3147 	sm->TimeoutEvt = FALSE;
3148 
3149 	sm->TimeoutCtr++;
3150 	if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3151 	    sm->TimeoutCtr > 1) {
3152 		/* Do not allow retransmission of EAPOL-Key msg 3/4 */
3153 		return;
3154 	}
3155 	if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
3156 		/* No point in sending the EAPOL-Key - we will disconnect
3157 		 * immediately following this. */
3158 		return;
3159 	}
3160 
3161 	/* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
3162 	   GTK[GN], IGTK, [FTIE], [TIE * 2])
3163 	 */
3164 	os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3165 	wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3166 	/* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
3167 	wpa_ie = sm->wpa_auth->wpa_ie;
3168 	wpa_ie_len = sm->wpa_auth->wpa_ie_len;
3169 	if (sm->wpa == WPA_VERSION_WPA &&
3170 	    (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
3171 	    wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
3172 		/* WPA-only STA, remove RSN IE and possible MDIE */
3173 		wpa_ie = wpa_ie + wpa_ie[1] + 2;
3174 		if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
3175 			wpa_ie = wpa_ie + wpa_ie[1] + 2;
3176 		wpa_ie_len = wpa_ie[1] + 2;
3177 	}
3178 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3179 			"sending 3/4 msg of 4-Way Handshake");
3180 	if (sm->wpa == WPA_VERSION_WPA2) {
3181 		/* WPA2 send GTK in the 4-way handshake */
3182 		secure = 1;
3183 		gtk = gsm->GTK[gsm->GN - 1];
3184 		gtk_len = gsm->GTK_len;
3185 		if (sm->wpa_auth->conf.disable_gtk ||
3186 		    sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
3187 			/*
3188 			 * Provide unique random GTK to each STA to prevent use
3189 			 * of GTK in the BSS.
3190 			 */
3191 			if (random_get_bytes(dummy_gtk, gtk_len) < 0)
3192 				return;
3193 			gtk = dummy_gtk;
3194 		}
3195 		keyidx = gsm->GN;
3196 		_rsc = rsc;
3197 		encr = 1;
3198 	} else {
3199 		/* WPA does not include GTK in msg 3/4 */
3200 		secure = 0;
3201 		gtk = NULL;
3202 		gtk_len = 0;
3203 		keyidx = 0;
3204 		_rsc = NULL;
3205 		if (sm->rx_eapol_key_secure) {
3206 			/*
3207 			 * It looks like Windows 7 supplicant tries to use
3208 			 * Secure bit in msg 2/4 after having reported Michael
3209 			 * MIC failure and it then rejects the 4-way handshake
3210 			 * if msg 3/4 does not set Secure bit. Work around this
3211 			 * by setting the Secure bit here even in the case of
3212 			 * WPA if the supplicant used it first.
3213 			 */
3214 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3215 					"STA used Secure bit in WPA msg 2/4 - "
3216 					"set Secure for 3/4 as workaround");
3217 			secure = 1;
3218 		}
3219 	}
3220 
3221 	kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
3222 	if (gtk)
3223 		kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
3224 #ifdef CONFIG_IEEE80211R_AP
3225 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3226 		kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
3227 		kde_len += 300; /* FTIE + 2 * TIE */
3228 	}
3229 #endif /* CONFIG_IEEE80211R_AP */
3230 #ifdef CONFIG_P2P
3231 	if (WPA_GET_BE32(sm->ip_addr) > 0)
3232 		kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
3233 #endif /* CONFIG_P2P */
3234 	kde = os_malloc(kde_len);
3235 	if (kde == NULL)
3236 		return;
3237 
3238 	pos = kde;
3239 	os_memcpy(pos, wpa_ie, wpa_ie_len);
3240 	pos += wpa_ie_len;
3241 #ifdef CONFIG_IEEE80211R_AP
3242 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3243 		int res;
3244 		size_t elen;
3245 
3246 		elen = pos - kde;
3247 		res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
3248 		if (res < 0) {
3249 			wpa_printf(MSG_ERROR, "FT: Failed to insert "
3250 				   "PMKR1Name into RSN IE in EAPOL-Key data");
3251 			os_free(kde);
3252 			return;
3253 		}
3254 		pos -= wpa_ie_len;
3255 		pos += elen;
3256 	}
3257 #endif /* CONFIG_IEEE80211R_AP */
3258 	if (gtk) {
3259 		u8 hdr[2];
3260 		hdr[0] = keyidx & 0x03;
3261 		hdr[1] = 0;
3262 		pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3263 				  gtk, gtk_len);
3264 	}
3265 	pos = ieee80211w_kde_add(sm, pos);
3266 	if (ocv_oci_add(sm, &pos) < 0) {
3267 		os_free(kde);
3268 		return;
3269 	}
3270 
3271 #ifdef CONFIG_IEEE80211R_AP
3272 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3273 		int res;
3274 		struct wpa_auth_config *conf;
3275 
3276 		conf = &sm->wpa_auth->conf;
3277 		if (sm->assoc_resp_ftie &&
3278 		    kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
3279 			os_memcpy(pos, sm->assoc_resp_ftie,
3280 				  2 + sm->assoc_resp_ftie[1]);
3281 			res = 2 + sm->assoc_resp_ftie[1];
3282 		} else {
3283 			int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3284 
3285 			res = wpa_write_ftie(conf, use_sha384,
3286 					     conf->r0_key_holder,
3287 					     conf->r0_key_holder_len,
3288 					     NULL, NULL, pos,
3289 					     kde + kde_len - pos,
3290 					     NULL, 0);
3291 		}
3292 		if (res < 0) {
3293 			wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3294 				   "into EAPOL-Key Key Data");
3295 			os_free(kde);
3296 			return;
3297 		}
3298 		pos += res;
3299 
3300 		/* TIE[ReassociationDeadline] (TU) */
3301 		*pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3302 		*pos++ = 5;
3303 		*pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3304 		WPA_PUT_LE32(pos, conf->reassociation_deadline);
3305 		pos += 4;
3306 
3307 		/* TIE[KeyLifetime] (seconds) */
3308 		*pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3309 		*pos++ = 5;
3310 		*pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
3311 		WPA_PUT_LE32(pos, conf->r0_key_lifetime);
3312 		pos += 4;
3313 	}
3314 #endif /* CONFIG_IEEE80211R_AP */
3315 #ifdef CONFIG_P2P
3316 	if (WPA_GET_BE32(sm->ip_addr) > 0) {
3317 		u8 addr[3 * 4];
3318 		os_memcpy(addr, sm->ip_addr, 4);
3319 		os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3320 		os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3321 		pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3322 				  addr, sizeof(addr), NULL, 0);
3323 	}
3324 #endif /* CONFIG_P2P */
3325 
3326 	wpa_send_eapol(sm->wpa_auth, sm,
3327 		       (secure ? WPA_KEY_INFO_SECURE : 0) |
3328 		       (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3329 			WPA_KEY_INFO_MIC : 0) |
3330 		       WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3331 		       WPA_KEY_INFO_KEY_TYPE,
3332 		       _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3333 	os_free(kde);
3334 }
3335 
3336 
3337 SM_STATE(WPA_PTK, PTKINITDONE)
3338 {
3339 	SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3340 	sm->EAPOLKeyReceived = FALSE;
3341 	if (sm->Pair) {
3342 		enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3343 		int klen = wpa_cipher_key_len(sm->pairwise);
3344 		if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
3345 				     sm->PTK.tk, klen)) {
3346 			wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3347 					   WLAN_REASON_PREV_AUTH_NOT_VALID);
3348 			return;
3349 		}
3350 		/* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3351 		sm->pairwise_set = TRUE;
3352 
3353 		wpa_auth_set_ptk_rekey_timer(sm);
3354 
3355 		if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3356 		    sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
3357 		    sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
3358 			wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3359 					   WPA_EAPOL_authorized, 1);
3360 		}
3361 	}
3362 
3363 	if (0 /* IBSS == TRUE */) {
3364 		sm->keycount++;
3365 		if (sm->keycount == 2) {
3366 			wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3367 					   WPA_EAPOL_portValid, 1);
3368 		}
3369 	} else {
3370 		wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3371 				   1);
3372 	}
3373 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3374 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3375 	if (sm->wpa == WPA_VERSION_WPA)
3376 		sm->PInitAKeys = TRUE;
3377 	else
3378 		sm->has_GTK = TRUE;
3379 	wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3380 			 "pairwise key handshake completed (%s)",
3381 			 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3382 
3383 #ifdef CONFIG_IEEE80211R_AP
3384 	wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
3385 #endif /* CONFIG_IEEE80211R_AP */
3386 }
3387 
3388 
3389 SM_STEP(WPA_PTK)
3390 {
3391 	struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3392 
3393 	if (sm->Init)
3394 		SM_ENTER(WPA_PTK, INITIALIZE);
3395 	else if (sm->Disconnect
3396 		 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3397 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3398 				"WPA_PTK: sm->Disconnect");
3399 		SM_ENTER(WPA_PTK, DISCONNECT);
3400 	}
3401 	else if (sm->DeauthenticationRequest)
3402 		SM_ENTER(WPA_PTK, DISCONNECTED);
3403 	else if (sm->AuthenticationRequest)
3404 		SM_ENTER(WPA_PTK, AUTHENTICATION);
3405 	else if (sm->ReAuthenticationRequest)
3406 		SM_ENTER(WPA_PTK, AUTHENTICATION2);
3407 	else if (sm->PTKRequest) {
3408 		if (wpa_auth_sm_ptk_update(sm) < 0)
3409 			SM_ENTER(WPA_PTK, DISCONNECTED);
3410 		else
3411 			SM_ENTER(WPA_PTK, PTKSTART);
3412 	} else switch (sm->wpa_ptk_state) {
3413 	case WPA_PTK_INITIALIZE:
3414 		break;
3415 	case WPA_PTK_DISCONNECT:
3416 		SM_ENTER(WPA_PTK, DISCONNECTED);
3417 		break;
3418 	case WPA_PTK_DISCONNECTED:
3419 		SM_ENTER(WPA_PTK, INITIALIZE);
3420 		break;
3421 	case WPA_PTK_AUTHENTICATION:
3422 		SM_ENTER(WPA_PTK, AUTHENTICATION2);
3423 		break;
3424 	case WPA_PTK_AUTHENTICATION2:
3425 		if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
3426 		    wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3427 				       WPA_EAPOL_keyRun) > 0)
3428 			SM_ENTER(WPA_PTK, INITPMK);
3429 		else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3430 			 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
3431 			 /* FIX: && 802.1X::keyRun */)
3432 			SM_ENTER(WPA_PTK, INITPSK);
3433 		else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3434 			SM_ENTER(WPA_PTK, INITPMK);
3435 		break;
3436 	case WPA_PTK_INITPMK:
3437 		if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3438 				       WPA_EAPOL_keyAvailable) > 0) {
3439 			SM_ENTER(WPA_PTK, PTKSTART);
3440 #ifdef CONFIG_DPP
3441 		} else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3442 			SM_ENTER(WPA_PTK, PTKSTART);
3443 #endif /* CONFIG_DPP */
3444 		} else {
3445 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
3446 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3447 					"INITPMK - keyAvailable = false");
3448 			SM_ENTER(WPA_PTK, DISCONNECT);
3449 		}
3450 		break;
3451 	case WPA_PTK_INITPSK:
3452 		if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
3453 				     NULL, NULL, NULL)) {
3454 			SM_ENTER(WPA_PTK, PTKSTART);
3455 #ifdef CONFIG_SAE
3456 		} else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3457 			SM_ENTER(WPA_PTK, PTKSTART);
3458 #endif /* CONFIG_SAE */
3459 		} else {
3460 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3461 					"no PSK configured for the STA");
3462 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
3463 			SM_ENTER(WPA_PTK, DISCONNECT);
3464 		}
3465 		break;
3466 	case WPA_PTK_PTKSTART:
3467 		if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3468 		    sm->EAPOLKeyPairwise)
3469 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3470 		else if (sm->TimeoutCtr >
3471 			 sm->wpa_auth->conf.wpa_pairwise_update_count) {
3472 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
3473 			wpa_auth_vlogger(
3474 				sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3475 				"PTKSTART: Retry limit %u reached",
3476 				sm->wpa_auth->conf.wpa_pairwise_update_count);
3477 			SM_ENTER(WPA_PTK, DISCONNECT);
3478 		} else if (sm->TimeoutEvt)
3479 			SM_ENTER(WPA_PTK, PTKSTART);
3480 		break;
3481 	case WPA_PTK_PTKCALCNEGOTIATING:
3482 		if (sm->MICVerified)
3483 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3484 		else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3485 			 sm->EAPOLKeyPairwise)
3486 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3487 		else if (sm->TimeoutEvt)
3488 			SM_ENTER(WPA_PTK, PTKSTART);
3489 		break;
3490 	case WPA_PTK_PTKCALCNEGOTIATING2:
3491 		SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3492 		break;
3493 	case WPA_PTK_PTKINITNEGOTIATING:
3494 		if (sm->update_snonce)
3495 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3496 		else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3497 			 sm->EAPOLKeyPairwise && sm->MICVerified)
3498 			SM_ENTER(WPA_PTK, PTKINITDONE);
3499 		else if (sm->TimeoutCtr >
3500 			 sm->wpa_auth->conf.wpa_pairwise_update_count ||
3501 			 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3502 			  sm->TimeoutCtr > 1)) {
3503 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
3504 			wpa_auth_vlogger(
3505 				sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3506 				"PTKINITNEGOTIATING: Retry limit %u reached",
3507 				sm->wpa_auth->conf.wpa_pairwise_update_count);
3508 			SM_ENTER(WPA_PTK, DISCONNECT);
3509 		} else if (sm->TimeoutEvt)
3510 			SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3511 		break;
3512 	case WPA_PTK_PTKINITDONE:
3513 		break;
3514 	}
3515 }
3516 
3517 
3518 SM_STATE(WPA_PTK_GROUP, IDLE)
3519 {
3520 	SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3521 	if (sm->Init) {
3522 		/* Init flag is not cleared here, so avoid busy
3523 		 * loop by claiming nothing changed. */
3524 		sm->changed = FALSE;
3525 	}
3526 	sm->GTimeoutCtr = 0;
3527 }
3528 
3529 
3530 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3531 {
3532 	u8 rsc[WPA_KEY_RSC_LEN];
3533 	struct wpa_group *gsm = sm->group;
3534 	const u8 *kde;
3535 	u8 *kde_buf = NULL, *pos, hdr[2];
3536 	size_t kde_len;
3537 	u8 *gtk, dummy_gtk[32];
3538 
3539 	SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
3540 
3541 	sm->GTimeoutCtr++;
3542 	if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3543 	    sm->GTimeoutCtr > 1) {
3544 		/* Do not allow retransmission of EAPOL-Key group msg 1/2 */
3545 		return;
3546 	}
3547 	if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
3548 		/* No point in sending the EAPOL-Key - we will disconnect
3549 		 * immediately following this. */
3550 		return;
3551 	}
3552 
3553 	if (sm->wpa == WPA_VERSION_WPA)
3554 		sm->PInitAKeys = FALSE;
3555 	sm->TimeoutEvt = FALSE;
3556 	/* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3557 	os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3558 	if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3559 		wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3560 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3561 			"sending 1/2 msg of Group Key Handshake");
3562 
3563 	gtk = gsm->GTK[gsm->GN - 1];
3564 	if (sm->wpa_auth->conf.disable_gtk ||
3565 	    sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
3566 		/*
3567 		 * Provide unique random GTK to each STA to prevent use
3568 		 * of GTK in the BSS.
3569 		 */
3570 		if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3571 			return;
3572 		gtk = dummy_gtk;
3573 	}
3574 	if (sm->wpa == WPA_VERSION_WPA2) {
3575 		kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3576 			ieee80211w_kde_len(sm) + ocv_oci_len(sm);
3577 		kde_buf = os_malloc(kde_len);
3578 		if (kde_buf == NULL)
3579 			return;
3580 
3581 		kde = pos = kde_buf;
3582 		hdr[0] = gsm->GN & 0x03;
3583 		hdr[1] = 0;
3584 		pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3585 				  gtk, gsm->GTK_len);
3586 		pos = ieee80211w_kde_add(sm, pos);
3587 		if (ocv_oci_add(sm, &pos) < 0) {
3588 			os_free(kde_buf);
3589 			return;
3590 		}
3591 		kde_len = pos - kde;
3592 	} else {
3593 		kde = gtk;
3594 		kde_len = gsm->GTK_len;
3595 	}
3596 
3597 	wpa_send_eapol(sm->wpa_auth, sm,
3598 		       WPA_KEY_INFO_SECURE |
3599 		       (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3600 			WPA_KEY_INFO_MIC : 0) |
3601 		       WPA_KEY_INFO_ACK |
3602 		       (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
3603 		       rsc, NULL, kde, kde_len, gsm->GN, 1);
3604 
3605 	os_free(kde_buf);
3606 }
3607 
3608 
3609 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3610 {
3611 #ifdef CONFIG_OCV
3612 	struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3613 	const u8 *key_data, *mic;
3614 	struct ieee802_1x_hdr *hdr;
3615 	struct wpa_eapol_key *key;
3616 	struct wpa_eapol_ie_parse kde;
3617 	size_t mic_len;
3618 	u16 key_data_length;
3619 #endif /* CONFIG_OCV */
3620 
3621 	SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3622 	sm->EAPOLKeyReceived = FALSE;
3623 
3624 #ifdef CONFIG_OCV
3625 	mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3626 
3627 	/*
3628 	 * Note: last_rx_eapol_key length fields have already been validated in
3629 	 * wpa_receive().
3630 	 */
3631 	hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
3632 	key = (struct wpa_eapol_key *) (hdr + 1);
3633 	mic = (u8 *) (key + 1);
3634 	key_data = mic + mic_len + 2;
3635 	key_data_length = WPA_GET_BE16(mic + mic_len);
3636 	if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
3637 	    sizeof(*key) - mic_len - 2)
3638 		return;
3639 
3640 	if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
3641 		wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
3642 				 "received EAPOL-Key group msg 2/2 with invalid Key Data contents");
3643 		return;
3644 	}
3645 
3646 	if (wpa_auth_uses_ocv(sm)) {
3647 		struct wpa_channel_info ci;
3648 		int tx_chanwidth;
3649 		int tx_seg1_idx;
3650 
3651 		if (wpa_channel_info(wpa_auth, &ci) != 0) {
3652 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3653 					"Failed to get channel info to validate received OCI in EAPOL-Key group 1/2");
3654 			return;
3655 		}
3656 
3657 		if (get_sta_tx_parameters(sm,
3658 					  channel_width_to_int(ci.chanwidth),
3659 					  ci.seg1_idx, &tx_chanwidth,
3660 					  &tx_seg1_idx) < 0)
3661 			return;
3662 
3663 		if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
3664 					 tx_chanwidth, tx_seg1_idx) != 0) {
3665 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3666 					ocv_errorstr);
3667 			return;
3668 		}
3669 	}
3670 #endif /* CONFIG_OCV */
3671 
3672 	if (sm->GUpdateStationKeys)
3673 		sm->group->GKeyDoneStations--;
3674 	sm->GUpdateStationKeys = FALSE;
3675 	sm->GTimeoutCtr = 0;
3676 	/* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3677 	wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3678 			 "group key handshake completed (%s)",
3679 			 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3680 	sm->has_GTK = TRUE;
3681 }
3682 
3683 
3684 SM_STATE(WPA_PTK_GROUP, KEYERROR)
3685 {
3686 	SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3687 	if (sm->GUpdateStationKeys)
3688 		sm->group->GKeyDoneStations--;
3689 	sm->GUpdateStationKeys = FALSE;
3690 	sm->Disconnect = TRUE;
3691 	wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3692 			 "group key handshake failed (%s) after %u tries",
3693 			 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3694 			 sm->wpa_auth->conf.wpa_group_update_count);
3695 }
3696 
3697 
3698 SM_STEP(WPA_PTK_GROUP)
3699 {
3700 	if (sm->Init || sm->PtkGroupInit) {
3701 		SM_ENTER(WPA_PTK_GROUP, IDLE);
3702 		sm->PtkGroupInit = FALSE;
3703 	} else switch (sm->wpa_ptk_group_state) {
3704 	case WPA_PTK_GROUP_IDLE:
3705 		if (sm->GUpdateStationKeys ||
3706 		    (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3707 			SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3708 		break;
3709 	case WPA_PTK_GROUP_REKEYNEGOTIATING:
3710 		if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3711 		    !sm->EAPOLKeyPairwise && sm->MICVerified)
3712 			SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3713 		else if (sm->GTimeoutCtr >
3714 			 sm->wpa_auth->conf.wpa_group_update_count ||
3715 			 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3716 			  sm->GTimeoutCtr > 1))
3717 			SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3718 		else if (sm->TimeoutEvt)
3719 			SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3720 		break;
3721 	case WPA_PTK_GROUP_KEYERROR:
3722 		SM_ENTER(WPA_PTK_GROUP, IDLE);
3723 		break;
3724 	case WPA_PTK_GROUP_REKEYESTABLISHED:
3725 		SM_ENTER(WPA_PTK_GROUP, IDLE);
3726 		break;
3727 	}
3728 }
3729 
3730 
3731 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3732 			  struct wpa_group *group)
3733 {
3734 	int ret = 0;
3735 
3736 	os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3737 	inc_byte_array(group->Counter, WPA_NONCE_LEN);
3738 	if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3739 			   wpa_auth->addr, group->GNonce,
3740 			   group->GTK[group->GN - 1], group->GTK_len) < 0)
3741 		ret = -1;
3742 	wpa_hexdump_key(MSG_DEBUG, "GTK",
3743 			group->GTK[group->GN - 1], group->GTK_len);
3744 
3745 #ifdef CONFIG_IEEE80211W
3746 	if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3747 		size_t len;
3748 		len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3749 		os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3750 		inc_byte_array(group->Counter, WPA_NONCE_LEN);
3751 		if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3752 				   wpa_auth->addr, group->GNonce,
3753 				   group->IGTK[group->GN_igtk - 4], len) < 0)
3754 			ret = -1;
3755 		wpa_hexdump_key(MSG_DEBUG, "IGTK",
3756 				group->IGTK[group->GN_igtk - 4], len);
3757 	}
3758 #endif /* CONFIG_IEEE80211W */
3759 
3760 	return ret;
3761 }
3762 
3763 
3764 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3765 			       struct wpa_group *group)
3766 {
3767 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3768 		   "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3769 	group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3770 	group->wpa_group_state = WPA_GROUP_GTK_INIT;
3771 
3772 	/* GTK[0..N] = 0 */
3773 	os_memset(group->GTK, 0, sizeof(group->GTK));
3774 	group->GN = 1;
3775 	group->GM = 2;
3776 #ifdef CONFIG_IEEE80211W
3777 	group->GN_igtk = 4;
3778 	group->GM_igtk = 5;
3779 #endif /* CONFIG_IEEE80211W */
3780 	/* GTK[GN] = CalcGTK() */
3781 	wpa_gtk_update(wpa_auth, group);
3782 }
3783 
3784 
3785 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3786 {
3787 	if (ctx != NULL && ctx != sm->group)
3788 		return 0;
3789 
3790 	if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3791 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3792 				"Not in PTKINITDONE; skip Group Key update");
3793 		sm->GUpdateStationKeys = FALSE;
3794 		return 0;
3795 	}
3796 	if (sm->GUpdateStationKeys) {
3797 		/*
3798 		 * This should not really happen, so add a debug log entry.
3799 		 * Since we clear the GKeyDoneStations before the loop, the
3800 		 * station needs to be counted here anyway.
3801 		 */
3802 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3803 				"GUpdateStationKeys was already set when "
3804 				"marking station for GTK rekeying");
3805 	}
3806 
3807 	/* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
3808 	if (sm->is_wnmsleep)
3809 		return 0;
3810 
3811 	sm->group->GKeyDoneStations++;
3812 	sm->GUpdateStationKeys = TRUE;
3813 
3814 	wpa_sm_step(sm);
3815 	return 0;
3816 }
3817 
3818 
3819 #ifdef CONFIG_WNM_AP
3820 /* update GTK when exiting WNM-Sleep Mode */
3821 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3822 {
3823 	if (sm == NULL || sm->is_wnmsleep)
3824 		return;
3825 
3826 	wpa_group_update_sta(sm, NULL);
3827 }
3828 
3829 
3830 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3831 {
3832 	if (sm)
3833 		sm->is_wnmsleep = !!flag;
3834 }
3835 
3836 
3837 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3838 {
3839 	struct wpa_group *gsm = sm->group;
3840 	u8 *start = pos;
3841 
3842 	/*
3843 	 * GTK subelement:
3844 	 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
3845 	 * Key[5..32]
3846 	 */
3847 	*pos++ = WNM_SLEEP_SUBELEM_GTK;
3848 	*pos++ = 11 + gsm->GTK_len;
3849 	/* Key ID in B0-B1 of Key Info */
3850 	WPA_PUT_LE16(pos, gsm->GN & 0x03);
3851 	pos += 2;
3852 	*pos++ = gsm->GTK_len;
3853 	if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
3854 		return 0;
3855 	pos += 8;
3856 	os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3857 	pos += gsm->GTK_len;
3858 
3859 	wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3860 		   gsm->GN);
3861 	wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
3862 			gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3863 
3864 	return pos - start;
3865 }
3866 
3867 
3868 #ifdef CONFIG_IEEE80211W
3869 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3870 {
3871 	struct wpa_group *gsm = sm->group;
3872 	u8 *start = pos;
3873 	size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3874 
3875 	/*
3876 	 * IGTK subelement:
3877 	 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3878 	 */
3879 	*pos++ = WNM_SLEEP_SUBELEM_IGTK;
3880 	*pos++ = 2 + 6 + len;
3881 	WPA_PUT_LE16(pos, gsm->GN_igtk);
3882 	pos += 2;
3883 	if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
3884 		return 0;
3885 	pos += 6;
3886 
3887 	os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3888 	pos += len;
3889 
3890 	wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3891 		   gsm->GN_igtk);
3892 	wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
3893 			gsm->IGTK[gsm->GN_igtk - 4], len);
3894 
3895 	return pos - start;
3896 }
3897 #endif /* CONFIG_IEEE80211W */
3898 #endif /* CONFIG_WNM_AP */
3899 
3900 
3901 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3902 			      struct wpa_group *group)
3903 {
3904 	int tmp;
3905 
3906 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3907 		   "SETKEYS (VLAN-ID %d)", group->vlan_id);
3908 	group->changed = TRUE;
3909 	group->wpa_group_state = WPA_GROUP_SETKEYS;
3910 	group->GTKReKey = FALSE;
3911 	tmp = group->GM;
3912 	group->GM = group->GN;
3913 	group->GN = tmp;
3914 #ifdef CONFIG_IEEE80211W
3915 	tmp = group->GM_igtk;
3916 	group->GM_igtk = group->GN_igtk;
3917 	group->GN_igtk = tmp;
3918 #endif /* CONFIG_IEEE80211W */
3919 	/* "GKeyDoneStations = GNoStations" is done in more robust way by
3920 	 * counting the STAs that are marked with GUpdateStationKeys instead of
3921 	 * including all STAs that could be in not-yet-completed state. */
3922 	wpa_gtk_update(wpa_auth, group);
3923 
3924 	if (group->GKeyDoneStations) {
3925 		wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3926 			   "GKeyDoneStations=%d when starting new GTK rekey",
3927 			   group->GKeyDoneStations);
3928 		group->GKeyDoneStations = 0;
3929 	}
3930 	wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
3931 	wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3932 		   group->GKeyDoneStations);
3933 }
3934 
3935 
3936 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3937 				       struct wpa_group *group)
3938 {
3939 	int ret = 0;
3940 
3941 	if (wpa_auth_set_key(wpa_auth, group->vlan_id,
3942 			     wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
3943 			     broadcast_ether_addr, group->GN,
3944 			     group->GTK[group->GN - 1], group->GTK_len) < 0)
3945 		ret = -1;
3946 
3947 #ifdef CONFIG_IEEE80211W
3948 	if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3949 		enum wpa_alg alg;
3950 		size_t len;
3951 
3952 		alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3953 		len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3954 
3955 		if (ret == 0 &&
3956 		    wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3957 				     broadcast_ether_addr, group->GN_igtk,
3958 				     group->IGTK[group->GN_igtk - 4], len) < 0)
3959 			ret = -1;
3960 	}
3961 #endif /* CONFIG_IEEE80211W */
3962 
3963 	return ret;
3964 }
3965 
3966 
3967 static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3968 {
3969 	if (sm->group == ctx) {
3970 		wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3971 			   " for discconnection due to fatal failure",
3972 			   MAC2STR(sm->addr));
3973 		sm->Disconnect = TRUE;
3974 	}
3975 
3976 	return 0;
3977 }
3978 
3979 
3980 static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3981 				    struct wpa_group *group)
3982 {
3983 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3984 	group->changed = TRUE;
3985 	group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3986 	wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3987 }
3988 
3989 
3990 static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3991 				 struct wpa_group *group)
3992 {
3993 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3994 		   "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3995 	group->changed = TRUE;
3996 	group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3997 
3998 	if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3999 		wpa_group_fatal_failure(wpa_auth, group);
4000 		return -1;
4001 	}
4002 
4003 	return 0;
4004 }
4005 
4006 
4007 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
4008 			      struct wpa_group *group)
4009 {
4010 	if (group->GInit) {
4011 		wpa_group_gtk_init(wpa_auth, group);
4012 	} else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
4013 		/* Do not allow group operations */
4014 	} else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
4015 		   group->GTKAuthenticator) {
4016 		wpa_group_setkeysdone(wpa_auth, group);
4017 	} else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
4018 		   group->GTKReKey) {
4019 		wpa_group_setkeys(wpa_auth, group);
4020 	} else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
4021 		if (group->GKeyDoneStations == 0)
4022 			wpa_group_setkeysdone(wpa_auth, group);
4023 		else if (group->GTKReKey)
4024 			wpa_group_setkeys(wpa_auth, group);
4025 	}
4026 }
4027 
4028 
4029 static int wpa_sm_step(struct wpa_state_machine *sm)
4030 {
4031 	if (sm == NULL)
4032 		return 0;
4033 
4034 	if (sm->in_step_loop) {
4035 		/* This should not happen, but if it does, make sure we do not
4036 		 * end up freeing the state machine too early by exiting the
4037 		 * recursive call. */
4038 		wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
4039 		return 0;
4040 	}
4041 
4042 	sm->in_step_loop = 1;
4043 	do {
4044 		if (sm->pending_deinit)
4045 			break;
4046 
4047 		sm->changed = FALSE;
4048 		sm->wpa_auth->group->changed = FALSE;
4049 
4050 		SM_STEP_RUN(WPA_PTK);
4051 		if (sm->pending_deinit)
4052 			break;
4053 		SM_STEP_RUN(WPA_PTK_GROUP);
4054 		if (sm->pending_deinit)
4055 			break;
4056 		wpa_group_sm_step(sm->wpa_auth, sm->group);
4057 	} while (sm->changed || sm->wpa_auth->group->changed);
4058 	sm->in_step_loop = 0;
4059 
4060 	if (sm->pending_deinit) {
4061 		wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
4062 			   "machine deinit for " MACSTR, MAC2STR(sm->addr));
4063 		wpa_free_sta_sm(sm);
4064 		return 1;
4065 	}
4066 	return 0;
4067 }
4068 
4069 
4070 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
4071 {
4072 	struct wpa_state_machine *sm = eloop_ctx;
4073 	wpa_sm_step(sm);
4074 }
4075 
4076 
4077 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
4078 {
4079 	if (sm == NULL)
4080 		return;
4081 	eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
4082 }
4083 
4084 
4085 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
4086 {
4087 	int tmp, i;
4088 	struct wpa_group *group;
4089 
4090 	if (wpa_auth == NULL)
4091 		return;
4092 
4093 	group = wpa_auth->group;
4094 
4095 	for (i = 0; i < 2; i++) {
4096 		tmp = group->GM;
4097 		group->GM = group->GN;
4098 		group->GN = tmp;
4099 #ifdef CONFIG_IEEE80211W
4100 		tmp = group->GM_igtk;
4101 		group->GM_igtk = group->GN_igtk;
4102 		group->GN_igtk = tmp;
4103 #endif /* CONFIG_IEEE80211W */
4104 		wpa_gtk_update(wpa_auth, group);
4105 		wpa_group_config_group_keys(wpa_auth, group);
4106 	}
4107 }
4108 
4109 
4110 static const char * wpa_bool_txt(int val)
4111 {
4112 	return val ? "TRUE" : "FALSE";
4113 }
4114 
4115 
4116 #define RSN_SUITE "%02x-%02x-%02x-%d"
4117 #define RSN_SUITE_ARG(s) \
4118 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
4119 
4120 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
4121 {
4122 	int len = 0, ret;
4123 	char pmkid_txt[PMKID_LEN * 2 + 1];
4124 #ifdef CONFIG_RSN_PREAUTH
4125 	const int preauth = 1;
4126 #else /* CONFIG_RSN_PREAUTH */
4127 	const int preauth = 0;
4128 #endif /* CONFIG_RSN_PREAUTH */
4129 
4130 	if (wpa_auth == NULL)
4131 		return len;
4132 
4133 	ret = os_snprintf(buf + len, buflen - len,
4134 			  "dot11RSNAOptionImplemented=TRUE\n"
4135 			  "dot11RSNAPreauthenticationImplemented=%s\n"
4136 			  "dot11RSNAEnabled=%s\n"
4137 			  "dot11RSNAPreauthenticationEnabled=%s\n",
4138 			  wpa_bool_txt(preauth),
4139 			  wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
4140 			  wpa_bool_txt(wpa_auth->conf.rsn_preauth));
4141 	if (os_snprintf_error(buflen - len, ret))
4142 		return len;
4143 	len += ret;
4144 
4145 	wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
4146 			 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
4147 
4148 	ret = os_snprintf(
4149 		buf + len, buflen - len,
4150 		"dot11RSNAConfigVersion=%u\n"
4151 		"dot11RSNAConfigPairwiseKeysSupported=9999\n"
4152 		/* FIX: dot11RSNAConfigGroupCipher */
4153 		/* FIX: dot11RSNAConfigGroupRekeyMethod */
4154 		/* FIX: dot11RSNAConfigGroupRekeyTime */
4155 		/* FIX: dot11RSNAConfigGroupRekeyPackets */
4156 		"dot11RSNAConfigGroupRekeyStrict=%u\n"
4157 		"dot11RSNAConfigGroupUpdateCount=%u\n"
4158 		"dot11RSNAConfigPairwiseUpdateCount=%u\n"
4159 		"dot11RSNAConfigGroupCipherSize=%u\n"
4160 		"dot11RSNAConfigPMKLifetime=%u\n"
4161 		"dot11RSNAConfigPMKReauthThreshold=%u\n"
4162 		"dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
4163 		"dot11RSNAConfigSATimeout=%u\n"
4164 		"dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
4165 		"dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
4166 		"dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
4167 		"dot11RSNAPMKIDUsed=%s\n"
4168 		"dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
4169 		"dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
4170 		"dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
4171 		"dot11RSNATKIPCounterMeasuresInvoked=%u\n"
4172 		"dot11RSNA4WayHandshakeFailures=%u\n"
4173 		"dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
4174 		RSN_VERSION,
4175 		!!wpa_auth->conf.wpa_strict_rekey,
4176 		wpa_auth->conf.wpa_group_update_count,
4177 		wpa_auth->conf.wpa_pairwise_update_count,
4178 		wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
4179 		dot11RSNAConfigPMKLifetime,
4180 		dot11RSNAConfigPMKReauthThreshold,
4181 		dot11RSNAConfigSATimeout,
4182 		RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
4183 		RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
4184 		RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
4185 		pmkid_txt,
4186 		RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
4187 		RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
4188 		RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
4189 		wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
4190 		wpa_auth->dot11RSNA4WayHandshakeFailures);
4191 	if (os_snprintf_error(buflen - len, ret))
4192 		return len;
4193 	len += ret;
4194 
4195 	/* TODO: dot11RSNAConfigPairwiseCiphersTable */
4196 	/* TODO: dot11RSNAConfigAuthenticationSuitesTable */
4197 
4198 	/* Private MIB */
4199 	ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
4200 			  wpa_auth->group->wpa_group_state);
4201 	if (os_snprintf_error(buflen - len, ret))
4202 		return len;
4203 	len += ret;
4204 
4205 	return len;
4206 }
4207 
4208 
4209 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
4210 {
4211 	int len = 0, ret;
4212 	u32 pairwise = 0;
4213 
4214 	if (sm == NULL)
4215 		return 0;
4216 
4217 	/* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
4218 
4219 	/* dot11RSNAStatsEntry */
4220 
4221 	pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
4222 				       WPA_PROTO_RSN : WPA_PROTO_WPA,
4223 				       sm->pairwise);
4224 	if (pairwise == 0)
4225 		return 0;
4226 
4227 	ret = os_snprintf(
4228 		buf + len, buflen - len,
4229 		/* TODO: dot11RSNAStatsIndex */
4230 		"dot11RSNAStatsSTAAddress=" MACSTR "\n"
4231 		"dot11RSNAStatsVersion=1\n"
4232 		"dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
4233 		/* TODO: dot11RSNAStatsTKIPICVErrors */
4234 		"dot11RSNAStatsTKIPLocalMICFailures=%u\n"
4235 		"dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
4236 		/* TODO: dot11RSNAStatsCCMPReplays */
4237 		/* TODO: dot11RSNAStatsCCMPDecryptErrors */
4238 		/* TODO: dot11RSNAStatsTKIPReplays */,
4239 		MAC2STR(sm->addr),
4240 		RSN_SUITE_ARG(pairwise),
4241 		sm->dot11RSNAStatsTKIPLocalMICFailures,
4242 		sm->dot11RSNAStatsTKIPRemoteMICFailures);
4243 	if (os_snprintf_error(buflen - len, ret))
4244 		return len;
4245 	len += ret;
4246 
4247 	/* Private MIB */
4248 	ret = os_snprintf(buf + len, buflen - len,
4249 			  "hostapdWPAPTKState=%d\n"
4250 			  "hostapdWPAPTKGroupState=%d\n",
4251 			  sm->wpa_ptk_state,
4252 			  sm->wpa_ptk_group_state);
4253 	if (os_snprintf_error(buflen - len, ret))
4254 		return len;
4255 	len += ret;
4256 
4257 	return len;
4258 }
4259 
4260 
4261 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
4262 {
4263 	if (wpa_auth)
4264 		wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
4265 }
4266 
4267 
4268 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
4269 {
4270 	return sm && sm->pairwise_set;
4271 }
4272 
4273 
4274 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
4275 {
4276 	return sm->pairwise;
4277 }
4278 
4279 
4280 const u8 * wpa_auth_get_pmk(struct wpa_state_machine *sm, int *len)
4281 {
4282 	if (!sm)
4283 		return NULL;
4284 	*len = sm->pmk_len;
4285 	return sm->PMK;
4286 }
4287 
4288 
4289 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
4290 {
4291 	if (sm == NULL)
4292 		return -1;
4293 	return sm->wpa_key_mgmt;
4294 }
4295 
4296 
4297 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
4298 {
4299 	if (sm == NULL)
4300 		return 0;
4301 	return sm->wpa;
4302 }
4303 
4304 
4305 int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
4306 {
4307 	if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
4308 		return 0;
4309 	return sm->tk_already_set;
4310 }
4311 
4312 
4313 int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm)
4314 {
4315 	if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt))
4316 		return 0;
4317 	return sm->tk_already_set;
4318 }
4319 
4320 
4321 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
4322 			     struct rsn_pmksa_cache_entry *entry)
4323 {
4324 	if (sm == NULL || sm->pmksa != entry)
4325 		return -1;
4326 	sm->pmksa = NULL;
4327 	return 0;
4328 }
4329 
4330 
4331 struct rsn_pmksa_cache_entry *
4332 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
4333 {
4334 	return sm ? sm->pmksa : NULL;
4335 }
4336 
4337 
4338 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
4339 {
4340 	if (sm)
4341 		sm->dot11RSNAStatsTKIPLocalMICFailures++;
4342 }
4343 
4344 
4345 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
4346 {
4347 	if (wpa_auth == NULL)
4348 		return NULL;
4349 	*len = wpa_auth->wpa_ie_len;
4350 	return wpa_auth->wpa_ie;
4351 }
4352 
4353 
4354 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
4355 		       unsigned int pmk_len,
4356 		       int session_timeout, struct eapol_state_machine *eapol)
4357 {
4358 	if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
4359 	    sm->wpa_auth->conf.disable_pmksa_caching)
4360 		return -1;
4361 
4362 	if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
4363 		if (pmk_len > PMK_LEN_SUITE_B_192)
4364 			pmk_len = PMK_LEN_SUITE_B_192;
4365 	} else if (pmk_len > PMK_LEN) {
4366 		pmk_len = PMK_LEN;
4367 	}
4368 
4369 	if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
4370 				 sm->PTK.kck, sm->PTK.kck_len,
4371 				 sm->wpa_auth->addr, sm->addr, session_timeout,
4372 				 eapol, sm->wpa_key_mgmt))
4373 		return 0;
4374 
4375 	return -1;
4376 }
4377 
4378 
4379 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4380 			       const u8 *pmk, size_t len, const u8 *sta_addr,
4381 			       int session_timeout,
4382 			       struct eapol_state_machine *eapol)
4383 {
4384 	if (wpa_auth == NULL)
4385 		return -1;
4386 
4387 	if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
4388 				 NULL, 0,
4389 				 wpa_auth->addr,
4390 				 sta_addr, session_timeout, eapol,
4391 				 WPA_KEY_MGMT_IEEE8021X))
4392 		return 0;
4393 
4394 	return -1;
4395 }
4396 
4397 
4398 int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
4399 			   const u8 *pmk, const u8 *pmkid)
4400 {
4401 	if (wpa_auth->conf.disable_pmksa_caching)
4402 		return -1;
4403 
4404 	if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
4405 				 NULL, 0,
4406 				 wpa_auth->addr, addr, 0, NULL,
4407 				 WPA_KEY_MGMT_SAE))
4408 		return 0;
4409 
4410 	return -1;
4411 }
4412 
4413 
4414 void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid)
4415 {
4416 	os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4417 	sm->pmkid_set = 1;
4418 }
4419 
4420 
4421 int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4422 			const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4423 			int session_timeout, int akmp)
4424 {
4425 	if (wpa_auth->conf.disable_pmksa_caching)
4426 		return -1;
4427 
4428 	if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4429 				 NULL, 0, wpa_auth->addr, addr, session_timeout,
4430 				 NULL, akmp))
4431 		return 0;
4432 
4433 	return -1;
4434 }
4435 
4436 
4437 void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4438 			   const u8 *sta_addr)
4439 {
4440 	struct rsn_pmksa_cache_entry *pmksa;
4441 
4442 	if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4443 		return;
4444 	pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4445 	if (pmksa) {
4446 		wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4447 			   MACSTR " based on request", MAC2STR(sta_addr));
4448 		pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4449 	}
4450 }
4451 
4452 
4453 int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4454 			size_t len)
4455 {
4456 	if (!wpa_auth || !wpa_auth->pmksa)
4457 		return 0;
4458 	return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4459 }
4460 
4461 
4462 void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4463 {
4464 	if (wpa_auth && wpa_auth->pmksa)
4465 		pmksa_cache_auth_flush(wpa_auth->pmksa);
4466 }
4467 
4468 
4469 #ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4470 #ifdef CONFIG_MESH
4471 
4472 int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4473 			     char *buf, size_t len)
4474 {
4475 	if (!wpa_auth || !wpa_auth->pmksa)
4476 		return 0;
4477 
4478 	return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4479 }
4480 
4481 
4482 struct rsn_pmksa_cache_entry *
4483 wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4484 			    const u8 *pmkid, int expiration)
4485 {
4486 	struct rsn_pmksa_cache_entry *entry;
4487 	struct os_reltime now;
4488 
4489 	entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4490 					      spa, 0, NULL, WPA_KEY_MGMT_SAE);
4491 	if (!entry)
4492 		return NULL;
4493 
4494 	os_get_reltime(&now);
4495 	entry->expiration = now.sec + expiration;
4496 	return entry;
4497 }
4498 
4499 
4500 int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4501 			     struct rsn_pmksa_cache_entry *entry)
4502 {
4503 	int ret;
4504 
4505 	if (!wpa_auth || !wpa_auth->pmksa)
4506 		return -1;
4507 
4508 	ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4509 	if (ret < 0)
4510 		wpa_printf(MSG_DEBUG,
4511 			   "RSN: Failed to store external PMKSA cache for "
4512 			   MACSTR, MAC2STR(entry->spa));
4513 
4514 	return ret;
4515 }
4516 
4517 #endif /* CONFIG_MESH */
4518 #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4519 
4520 
4521 struct rsn_pmksa_cache_entry *
4522 wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4523 		   const u8 *pmkid)
4524 {
4525 	if (!wpa_auth || !wpa_auth->pmksa)
4526 		return NULL;
4527 	return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
4528 }
4529 
4530 
4531 void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4532 			      struct wpa_state_machine *sm,
4533 			      struct wpa_authenticator *wpa_auth,
4534 			      u8 *pmkid, u8 *pmk)
4535 {
4536 	if (!sm)
4537 		return;
4538 
4539 	sm->pmksa = pmksa;
4540 	os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4541 	os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4542 	os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
4543 }
4544 
4545 
4546 /*
4547  * Remove and free the group from wpa_authenticator. This is triggered by a
4548  * callback to make sure nobody is currently iterating the group list while it
4549  * gets modified.
4550  */
4551 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4552 			   struct wpa_group *group)
4553 {
4554 	struct wpa_group *prev = wpa_auth->group;
4555 
4556 	wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4557 		   group->vlan_id);
4558 
4559 	while (prev) {
4560 		if (prev->next == group) {
4561 			/* This never frees the special first group as needed */
4562 			prev->next = group->next;
4563 			os_free(group);
4564 			break;
4565 		}
4566 		prev = prev->next;
4567 	}
4568 
4569 }
4570 
4571 
4572 /* Increase the reference counter for group */
4573 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4574 			  struct wpa_group *group)
4575 {
4576 	/* Skip the special first group */
4577 	if (wpa_auth->group == group)
4578 		return;
4579 
4580 	group->references++;
4581 }
4582 
4583 
4584 /* Decrease the reference counter and maybe free the group */
4585 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4586 			  struct wpa_group *group)
4587 {
4588 	/* Skip the special first group */
4589 	if (wpa_auth->group == group)
4590 		return;
4591 
4592 	group->references--;
4593 	if (group->references)
4594 		return;
4595 	wpa_group_free(wpa_auth, group);
4596 }
4597 
4598 
4599 /*
4600  * Add a group that has its references counter set to zero. Caller needs to
4601  * call wpa_group_get() on the return value to mark the entry in use.
4602  */
4603 static struct wpa_group *
4604 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4605 {
4606 	struct wpa_group *group;
4607 
4608 	if (wpa_auth == NULL || wpa_auth->group == NULL)
4609 		return NULL;
4610 
4611 	wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4612 		   vlan_id);
4613 	group = wpa_group_init(wpa_auth, vlan_id, 0);
4614 	if (group == NULL)
4615 		return NULL;
4616 
4617 	group->next = wpa_auth->group->next;
4618 	wpa_auth->group->next = group;
4619 
4620 	return group;
4621 }
4622 
4623 
4624 /*
4625  * Enforce that the group state machine for the VLAN is running, increase
4626  * reference counter as interface is up. References might have been increased
4627  * even if a negative value is returned.
4628  * Returns: -1 on error (group missing, group already failed); otherwise, 0
4629  */
4630 int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4631 {
4632 	struct wpa_group *group;
4633 
4634 	if (wpa_auth == NULL)
4635 		return 0;
4636 
4637 	group = wpa_auth->group;
4638 	while (group) {
4639 		if (group->vlan_id == vlan_id)
4640 			break;
4641 		group = group->next;
4642 	}
4643 
4644 	if (group == NULL) {
4645 		group = wpa_auth_add_group(wpa_auth, vlan_id);
4646 		if (group == NULL)
4647 			return -1;
4648 	}
4649 
4650 	wpa_printf(MSG_DEBUG,
4651 		   "WPA: Ensure group state machine running for VLAN ID %d",
4652 		   vlan_id);
4653 
4654 	wpa_group_get(wpa_auth, group);
4655 	group->num_setup_iface++;
4656 
4657 	if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4658 		return -1;
4659 
4660 	return 0;
4661 }
4662 
4663 
4664 /*
4665  * Decrease reference counter, expected to be zero afterwards.
4666  * returns: -1 on error (group not found, group in fail state)
4667  *          -2 if wpa_group is still referenced
4668  *           0 else
4669  */
4670 int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4671 {
4672 	struct wpa_group *group;
4673 	int ret = 0;
4674 
4675 	if (wpa_auth == NULL)
4676 		return 0;
4677 
4678 	group = wpa_auth->group;
4679 	while (group) {
4680 		if (group->vlan_id == vlan_id)
4681 			break;
4682 		group = group->next;
4683 	}
4684 
4685 	if (group == NULL)
4686 		return -1;
4687 
4688 	wpa_printf(MSG_DEBUG,
4689 		   "WPA: Try stopping group state machine for VLAN ID %d",
4690 		   vlan_id);
4691 
4692 	if (group->num_setup_iface <= 0) {
4693 		wpa_printf(MSG_ERROR,
4694 			   "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4695 			   vlan_id);
4696 		return -1;
4697 	}
4698 	group->num_setup_iface--;
4699 
4700 	if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4701 		ret = -1;
4702 
4703 	if (group->references > 1) {
4704 		wpa_printf(MSG_DEBUG,
4705 			   "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4706 			   vlan_id);
4707 		ret = -2;
4708 	}
4709 
4710 	wpa_group_put(wpa_auth, group);
4711 
4712 	return ret;
4713 }
4714 
4715 
4716 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4717 {
4718 	struct wpa_group *group;
4719 
4720 	if (sm == NULL || sm->wpa_auth == NULL)
4721 		return 0;
4722 
4723 	group = sm->wpa_auth->group;
4724 	while (group) {
4725 		if (group->vlan_id == vlan_id)
4726 			break;
4727 		group = group->next;
4728 	}
4729 
4730 	if (group == NULL) {
4731 		group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4732 		if (group == NULL)
4733 			return -1;
4734 	}
4735 
4736 	if (sm->group == group)
4737 		return 0;
4738 
4739 	if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4740 		return -1;
4741 
4742 	wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4743 		   "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4744 
4745 	wpa_group_get(sm->wpa_auth, group);
4746 	wpa_group_put(sm->wpa_auth, sm->group);
4747 	sm->group = group;
4748 
4749 	return 0;
4750 }
4751 
4752 
4753 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4754 				  struct wpa_state_machine *sm, int ack)
4755 {
4756 	if (wpa_auth == NULL || sm == NULL)
4757 		return;
4758 	wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4759 		   " ack=%d", MAC2STR(sm->addr), ack);
4760 	if (sm->pending_1_of_4_timeout && ack) {
4761 		/*
4762 		 * Some deployed supplicant implementations update their SNonce
4763 		 * for each EAPOL-Key 2/4 message even within the same 4-way
4764 		 * handshake and then fail to use the first SNonce when
4765 		 * deriving the PTK. This results in unsuccessful 4-way
4766 		 * handshake whenever the relatively short initial timeout is
4767 		 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4768 		 * around this by increasing the timeout now that we know that
4769 		 * the station has received the frame.
4770 		 */
4771 		int timeout_ms = eapol_key_timeout_subseq;
4772 		wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4773 			   "timeout by %u ms because of acknowledged frame",
4774 			   timeout_ms);
4775 		eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4776 		eloop_register_timeout(timeout_ms / 1000,
4777 				       (timeout_ms % 1000) * 1000,
4778 				       wpa_send_eapol_timeout, wpa_auth, sm);
4779 	}
4780 
4781 #ifdef CONFIG_TESTING_OPTIONS
4782 	if (sm->eapol_status_cb) {
4783 		sm->eapol_status_cb(sm->eapol_status_cb_ctx1,
4784 				    sm->eapol_status_cb_ctx2);
4785 		sm->eapol_status_cb = NULL;
4786 	}
4787 #endif /* CONFIG_TESTING_OPTIONS */
4788 }
4789 
4790 
4791 int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4792 {
4793 	if (sm == NULL)
4794 		return 0;
4795 	return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4796 }
4797 
4798 
4799 int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4800 {
4801 	if (sm == NULL)
4802 		return 0;
4803 	return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4804 }
4805 
4806 
4807 #ifdef CONFIG_P2P
4808 int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4809 {
4810 	if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4811 		return -1;
4812 	os_memcpy(addr, sm->ip_addr, 4);
4813 	return 0;
4814 }
4815 #endif /* CONFIG_P2P */
4816 
4817 
4818 int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4819 					 struct radius_das_attrs *attr)
4820 {
4821 	return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4822 }
4823 
4824 
4825 void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4826 {
4827 	struct wpa_group *group;
4828 
4829 	if (!wpa_auth)
4830 		return;
4831 	for (group = wpa_auth->group; group; group = group->next)
4832 		wpa_group_config_group_keys(wpa_auth, group);
4833 }
4834 
4835 
4836 #ifdef CONFIG_FILS
4837 
4838 struct wpa_auth_fils_iter_data {
4839 	struct wpa_authenticator *auth;
4840 	const u8 *cache_id;
4841 	struct rsn_pmksa_cache_entry *pmksa;
4842 	const u8 *spa;
4843 	const u8 *pmkid;
4844 };
4845 
4846 
4847 static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4848 {
4849 	struct wpa_auth_fils_iter_data *data = ctx;
4850 
4851 	if (a == data->auth || !a->conf.fils_cache_id_set ||
4852 	    os_memcmp(a->conf.fils_cache_id, data->cache_id,
4853 		      FILS_CACHE_ID_LEN) != 0)
4854 		return 0;
4855 	data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4856 	return data->pmksa != NULL;
4857 }
4858 
4859 
4860 struct rsn_pmksa_cache_entry *
4861 wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4862 				 const u8 *sta_addr, const u8 *pmkid)
4863 {
4864 	struct wpa_auth_fils_iter_data idata;
4865 
4866 	if (!wpa_auth->conf.fils_cache_id_set)
4867 		return NULL;
4868 	idata.auth = wpa_auth;
4869 	idata.cache_id = wpa_auth->conf.fils_cache_id;
4870 	idata.pmksa = NULL;
4871 	idata.spa = sta_addr;
4872 	idata.pmkid = pmkid;
4873 	wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4874 	return idata.pmksa;
4875 }
4876 
4877 
4878 #ifdef CONFIG_IEEE80211R_AP
4879 int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384,
4880 		       u8 *buf, size_t len)
4881 {
4882 	struct wpa_auth_config *conf = &wpa_auth->conf;
4883 
4884 	return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder,
4885 			      conf->r0_key_holder_len,
4886 			      NULL, NULL, buf, len, NULL, 0);
4887 }
4888 #endif /* CONFIG_IEEE80211R_AP */
4889 
4890 
4891 void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4892 				   u8 *fils_anonce, u8 *fils_snonce,
4893 				   u8 *fils_kek, size_t *fils_kek_len)
4894 {
4895 	os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4896 	os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4897 	os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4898 	*fils_kek_len = sm->PTK.kek_len;
4899 }
4900 
4901 
4902 void wpa_auth_add_fils_pmk_pmkid(struct wpa_state_machine *sm, const u8 *pmk,
4903 				 size_t pmk_len, const u8 *pmkid)
4904 {
4905 	os_memcpy(sm->PMK, pmk, pmk_len);
4906 	sm->pmk_len = pmk_len;
4907 	os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4908 	sm->pmkid_set = 1;
4909 }
4910 
4911 #endif /* CONFIG_FILS */
4912 
4913 
4914 void wpa_auth_set_auth_alg(struct wpa_state_machine *sm, u16 auth_alg)
4915 {
4916 	if (sm)
4917 		sm->auth_alg = auth_alg;
4918 }
4919 
4920 
4921 #ifdef CONFIG_DPP2
4922 void wpa_auth_set_dpp_z(struct wpa_state_machine *sm, const struct wpabuf *z)
4923 {
4924 	if (sm) {
4925 		wpabuf_clear_free(sm->dpp_z);
4926 		sm->dpp_z = z ? wpabuf_dup(z) : NULL;
4927 	}
4928 }
4929 #endif /* CONFIG_DPP2 */
4930 
4931 
4932 #ifdef CONFIG_TESTING_OPTIONS
4933 
4934 int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce,
4935 		       void (*cb)(void *ctx1, void *ctx2),
4936 		       void *ctx1, void *ctx2)
4937 {
4938 	const u8 *anonce = sm->ANonce;
4939 	u8 anonce_buf[WPA_NONCE_LEN];
4940 
4941 	if (change_anonce) {
4942 		if (random_get_bytes(anonce_buf, WPA_NONCE_LEN))
4943 			return -1;
4944 		anonce = anonce_buf;
4945 	}
4946 
4947 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4948 			"sending 1/4 msg of 4-Way Handshake (TESTING)");
4949 	wpa_send_eapol(sm->wpa_auth, sm,
4950 		       WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
4951 		       anonce, NULL, 0, 0, 0);
4952 	return 0;
4953 }
4954 
4955 
4956 int wpa_auth_resend_m3(struct wpa_state_machine *sm,
4957 		       void (*cb)(void *ctx1, void *ctx2),
4958 		       void *ctx1, void *ctx2)
4959 {
4960 	u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
4961 #ifdef CONFIG_IEEE80211W
4962 	u8 *opos;
4963 #endif /* CONFIG_IEEE80211W */
4964 	size_t gtk_len, kde_len;
4965 	struct wpa_group *gsm = sm->group;
4966 	u8 *wpa_ie;
4967 	int wpa_ie_len, secure, keyidx, encr = 0;
4968 
4969 	/* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
4970 	   GTK[GN], IGTK, [FTIE], [TIE * 2])
4971 	 */
4972 
4973 	/* Use 0 RSC */
4974 	os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4975 	/* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
4976 	wpa_ie = sm->wpa_auth->wpa_ie;
4977 	wpa_ie_len = sm->wpa_auth->wpa_ie_len;
4978 	if (sm->wpa == WPA_VERSION_WPA &&
4979 	    (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
4980 	    wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
4981 		/* WPA-only STA, remove RSN IE and possible MDIE */
4982 		wpa_ie = wpa_ie + wpa_ie[1] + 2;
4983 		if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
4984 			wpa_ie = wpa_ie + wpa_ie[1] + 2;
4985 		wpa_ie_len = wpa_ie[1] + 2;
4986 	}
4987 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4988 			"sending 3/4 msg of 4-Way Handshake (TESTING)");
4989 	if (sm->wpa == WPA_VERSION_WPA2) {
4990 		/* WPA2 send GTK in the 4-way handshake */
4991 		secure = 1;
4992 		gtk = gsm->GTK[gsm->GN - 1];
4993 		gtk_len = gsm->GTK_len;
4994 		keyidx = gsm->GN;
4995 		_rsc = rsc;
4996 		encr = 1;
4997 	} else {
4998 		/* WPA does not include GTK in msg 3/4 */
4999 		secure = 0;
5000 		gtk = NULL;
5001 		gtk_len = 0;
5002 		keyidx = 0;
5003 		_rsc = NULL;
5004 		if (sm->rx_eapol_key_secure) {
5005 			/*
5006 			 * It looks like Windows 7 supplicant tries to use
5007 			 * Secure bit in msg 2/4 after having reported Michael
5008 			 * MIC failure and it then rejects the 4-way handshake
5009 			 * if msg 3/4 does not set Secure bit. Work around this
5010 			 * by setting the Secure bit here even in the case of
5011 			 * WPA if the supplicant used it first.
5012 			 */
5013 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5014 					"STA used Secure bit in WPA msg 2/4 - "
5015 					"set Secure for 3/4 as workaround");
5016 			secure = 1;
5017 		}
5018 	}
5019 
5020 	kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
5021 	if (gtk)
5022 		kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
5023 #ifdef CONFIG_IEEE80211R_AP
5024 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5025 		kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
5026 		kde_len += 300; /* FTIE + 2 * TIE */
5027 	}
5028 #endif /* CONFIG_IEEE80211R_AP */
5029 	kde = os_malloc(kde_len);
5030 	if (kde == NULL)
5031 		return -1;
5032 
5033 	pos = kde;
5034 	os_memcpy(pos, wpa_ie, wpa_ie_len);
5035 	pos += wpa_ie_len;
5036 #ifdef CONFIG_IEEE80211R_AP
5037 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5038 		int res;
5039 		size_t elen;
5040 
5041 		elen = pos - kde;
5042 		res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
5043 		if (res < 0) {
5044 			wpa_printf(MSG_ERROR, "FT: Failed to insert "
5045 				   "PMKR1Name into RSN IE in EAPOL-Key data");
5046 			os_free(kde);
5047 			return -1;
5048 		}
5049 		pos -= wpa_ie_len;
5050 		pos += elen;
5051 	}
5052 #endif /* CONFIG_IEEE80211R_AP */
5053 	if (gtk) {
5054 		u8 hdr[2];
5055 		hdr[0] = keyidx & 0x03;
5056 		hdr[1] = 0;
5057 		pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5058 				  gtk, gtk_len);
5059 	}
5060 #ifdef CONFIG_IEEE80211W
5061 	opos = pos;
5062 	pos = ieee80211w_kde_add(sm, pos);
5063 	if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5064 		/* skip KDE header and keyid */
5065 		opos += 2 + RSN_SELECTOR_LEN + 2;
5066 		os_memset(opos, 0, 6); /* clear PN */
5067 	}
5068 #endif /* CONFIG_IEEE80211W */
5069 	if (ocv_oci_add(sm, &pos) < 0) {
5070 		os_free(kde);
5071 		return -1;
5072 	}
5073 
5074 #ifdef CONFIG_IEEE80211R_AP
5075 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5076 		int res;
5077 		struct wpa_auth_config *conf;
5078 
5079 		conf = &sm->wpa_auth->conf;
5080 		if (sm->assoc_resp_ftie &&
5081 		    kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
5082 			os_memcpy(pos, sm->assoc_resp_ftie,
5083 				  2 + sm->assoc_resp_ftie[1]);
5084 			res = 2 + sm->assoc_resp_ftie[1];
5085 		} else {
5086 			int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
5087 
5088 			res = wpa_write_ftie(conf, use_sha384,
5089 					     conf->r0_key_holder,
5090 					     conf->r0_key_holder_len,
5091 					     NULL, NULL, pos,
5092 					     kde + kde_len - pos,
5093 					     NULL, 0);
5094 		}
5095 		if (res < 0) {
5096 			wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
5097 				   "into EAPOL-Key Key Data");
5098 			os_free(kde);
5099 			return -1;
5100 		}
5101 		pos += res;
5102 
5103 		/* TIE[ReassociationDeadline] (TU) */
5104 		*pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5105 		*pos++ = 5;
5106 		*pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
5107 		WPA_PUT_LE32(pos, conf->reassociation_deadline);
5108 		pos += 4;
5109 
5110 		/* TIE[KeyLifetime] (seconds) */
5111 		*pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5112 		*pos++ = 5;
5113 		*pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
5114 		WPA_PUT_LE32(pos, conf->r0_key_lifetime);
5115 		pos += 4;
5116 	}
5117 #endif /* CONFIG_IEEE80211R_AP */
5118 
5119 	wpa_send_eapol(sm->wpa_auth, sm,
5120 		       (secure ? WPA_KEY_INFO_SECURE : 0) |
5121 		       (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5122 			WPA_KEY_INFO_MIC : 0) |
5123 		       WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
5124 		       WPA_KEY_INFO_KEY_TYPE,
5125 		       _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
5126 	os_free(kde);
5127 	return 0;
5128 }
5129 
5130 
5131 int wpa_auth_resend_group_m1(struct wpa_state_machine *sm,
5132 			     void (*cb)(void *ctx1, void *ctx2),
5133 			     void *ctx1, void *ctx2)
5134 {
5135 	u8 rsc[WPA_KEY_RSC_LEN];
5136 	struct wpa_group *gsm = sm->group;
5137 	const u8 *kde;
5138 	u8 *kde_buf = NULL, *pos, hdr[2];
5139 #ifdef CONFIG_IEEE80211W
5140 	u8 *opos;
5141 #endif /* CONFIG_IEEE80211W */
5142 	size_t kde_len;
5143 	u8 *gtk;
5144 
5145 	/* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
5146 	os_memset(rsc, 0, WPA_KEY_RSC_LEN);
5147 	/* Use 0 RSC */
5148 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5149 			"sending 1/2 msg of Group Key Handshake (TESTING)");
5150 
5151 	gtk = gsm->GTK[gsm->GN - 1];
5152 	if (sm->wpa == WPA_VERSION_WPA2) {
5153 		kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
5154 			ieee80211w_kde_len(sm) + ocv_oci_len(sm);
5155 		kde_buf = os_malloc(kde_len);
5156 		if (kde_buf == NULL)
5157 			return -1;
5158 
5159 		kde = pos = kde_buf;
5160 		hdr[0] = gsm->GN & 0x03;
5161 		hdr[1] = 0;
5162 		pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5163 				  gtk, gsm->GTK_len);
5164 #ifdef CONFIG_IEEE80211W
5165 		opos = pos;
5166 		pos = ieee80211w_kde_add(sm, pos);
5167 		if (pos - opos >=
5168 		    2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5169 			/* skip KDE header and keyid */
5170 			opos += 2 + RSN_SELECTOR_LEN + 2;
5171 			os_memset(opos, 0, 6); /* clear PN */
5172 		}
5173 #endif /* CONFIG_IEEE80211W */
5174 		if (ocv_oci_add(sm, &pos) < 0) {
5175 			os_free(kde_buf);
5176 			return -1;
5177 		}
5178 		kde_len = pos - kde;
5179 	} else {
5180 		kde = gtk;
5181 		kde_len = gsm->GTK_len;
5182 	}
5183 
5184 	sm->eapol_status_cb = cb;
5185 	sm->eapol_status_cb_ctx1 = ctx1;
5186 	sm->eapol_status_cb_ctx2 = ctx2;
5187 
5188 	wpa_send_eapol(sm->wpa_auth, sm,
5189 		       WPA_KEY_INFO_SECURE |
5190 		       (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5191 			WPA_KEY_INFO_MIC : 0) |
5192 		       WPA_KEY_INFO_ACK |
5193 		       (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
5194 		       rsc, NULL, kde, kde_len, gsm->GN, 1);
5195 
5196 	os_free(kde_buf);
5197 	return 0;
5198 }
5199 
5200 
5201 int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth)
5202 {
5203 	if (!wpa_auth)
5204 		return -1;
5205 	eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
5206 	return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL);
5207 }
5208 
5209 #endif /* CONFIG_TESTING_OPTIONS */
5210