xref: /freebsd/contrib/wpa/src/ap/wpa_auth.c (revision eb69d1f144a6fcc765d1b9d44a5ae8082353e70b)
1 /*
2  * IEEE 802.11 RSN / WPA Authenticator
3  * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
4  *
5  * This software may be distributed under the terms of the BSD license.
6  * See README for more details.
7  */
8 
9 #include "utils/includes.h"
10 
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "utils/state_machine.h"
14 #include "utils/bitfield.h"
15 #include "common/ieee802_11_defs.h"
16 #include "crypto/aes_wrap.h"
17 #include "crypto/crypto.h"
18 #include "crypto/sha1.h"
19 #include "crypto/sha256.h"
20 #include "crypto/random.h"
21 #include "eapol_auth/eapol_auth_sm.h"
22 #include "ap_config.h"
23 #include "ieee802_11.h"
24 #include "wpa_auth.h"
25 #include "pmksa_cache_auth.h"
26 #include "wpa_auth_i.h"
27 #include "wpa_auth_ie.h"
28 
29 #define STATE_MACHINE_DATA struct wpa_state_machine
30 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
31 #define STATE_MACHINE_ADDR sm->addr
32 
33 
34 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
35 static int wpa_sm_step(struct wpa_state_machine *sm);
36 static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
37 			      size_t data_len);
38 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
39 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
40 			      struct wpa_group *group);
41 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
42 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
43 			  struct wpa_group *group);
44 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
45 				       struct wpa_group *group);
46 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
47 			  const u8 *pmk, struct wpa_ptk *ptk);
48 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
49 			   struct wpa_group *group);
50 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
51 			  struct wpa_group *group);
52 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
53 			  struct wpa_group *group);
54 
55 static const u32 dot11RSNAConfigGroupUpdateCount = 4;
56 static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
57 static const u32 eapol_key_timeout_first = 100; /* ms */
58 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
59 static const u32 eapol_key_timeout_first_group = 500; /* ms */
60 
61 /* TODO: make these configurable */
62 static const int dot11RSNAConfigPMKLifetime = 43200;
63 static const int dot11RSNAConfigPMKReauthThreshold = 70;
64 static const int dot11RSNAConfigSATimeout = 60;
65 
66 
67 static inline int wpa_auth_mic_failure_report(
68 	struct wpa_authenticator *wpa_auth, const u8 *addr)
69 {
70 	if (wpa_auth->cb.mic_failure_report)
71 		return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
72 	return 0;
73 }
74 
75 
76 static inline void wpa_auth_psk_failure_report(
77 	struct wpa_authenticator *wpa_auth, const u8 *addr)
78 {
79 	if (wpa_auth->cb.psk_failure_report)
80 		wpa_auth->cb.psk_failure_report(wpa_auth->cb.ctx, addr);
81 }
82 
83 
84 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
85 				      const u8 *addr, wpa_eapol_variable var,
86 				      int value)
87 {
88 	if (wpa_auth->cb.set_eapol)
89 		wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
90 }
91 
92 
93 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
94 				     const u8 *addr, wpa_eapol_variable var)
95 {
96 	if (wpa_auth->cb.get_eapol == NULL)
97 		return -1;
98 	return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
99 }
100 
101 
102 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
103 					  const u8 *addr,
104 					  const u8 *p2p_dev_addr,
105 					  const u8 *prev_psk)
106 {
107 	if (wpa_auth->cb.get_psk == NULL)
108 		return NULL;
109 	return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
110 				    prev_psk);
111 }
112 
113 
114 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
115 				   const u8 *addr, u8 *msk, size_t *len)
116 {
117 	if (wpa_auth->cb.get_msk == NULL)
118 		return -1;
119 	return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
120 }
121 
122 
123 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
124 				   int vlan_id,
125 				   enum wpa_alg alg, const u8 *addr, int idx,
126 				   u8 *key, size_t key_len)
127 {
128 	if (wpa_auth->cb.set_key == NULL)
129 		return -1;
130 	return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
131 				    key, key_len);
132 }
133 
134 
135 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
136 				      const u8 *addr, int idx, u8 *seq)
137 {
138 	if (wpa_auth->cb.get_seqnum == NULL)
139 		return -1;
140 	return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
141 }
142 
143 
144 static inline int
145 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
146 		    const u8 *data, size_t data_len, int encrypt)
147 {
148 	if (wpa_auth->cb.send_eapol == NULL)
149 		return -1;
150 	return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
151 				       encrypt);
152 }
153 
154 
155 #ifdef CONFIG_MESH
156 static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
157 				      const u8 *addr)
158 {
159 	if (wpa_auth->cb.start_ampe == NULL)
160 		return -1;
161 	return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr);
162 }
163 #endif /* CONFIG_MESH */
164 
165 
166 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
167 			  int (*cb)(struct wpa_state_machine *sm, void *ctx),
168 			  void *cb_ctx)
169 {
170 	if (wpa_auth->cb.for_each_sta == NULL)
171 		return 0;
172 	return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
173 }
174 
175 
176 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
177 			   int (*cb)(struct wpa_authenticator *a, void *ctx),
178 			   void *cb_ctx)
179 {
180 	if (wpa_auth->cb.for_each_auth == NULL)
181 		return 0;
182 	return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
183 }
184 
185 
186 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
187 		     logger_level level, const char *txt)
188 {
189 	if (wpa_auth->cb.logger == NULL)
190 		return;
191 	wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
192 }
193 
194 
195 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
196 		      logger_level level, const char *fmt, ...)
197 {
198 	char *format;
199 	int maxlen;
200 	va_list ap;
201 
202 	if (wpa_auth->cb.logger == NULL)
203 		return;
204 
205 	maxlen = os_strlen(fmt) + 100;
206 	format = os_malloc(maxlen);
207 	if (!format)
208 		return;
209 
210 	va_start(ap, fmt);
211 	vsnprintf(format, maxlen, fmt, ap);
212 	va_end(ap);
213 
214 	wpa_auth_logger(wpa_auth, addr, level, format);
215 
216 	os_free(format);
217 }
218 
219 
220 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
221 			       const u8 *addr)
222 {
223 	if (wpa_auth->cb.disconnect == NULL)
224 		return;
225 	wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
226 	wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
227 				WLAN_REASON_PREV_AUTH_NOT_VALID);
228 }
229 
230 
231 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
232 {
233 	int ret = 0;
234 #ifdef CONFIG_IEEE80211R
235 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
236 		ret = 1;
237 #endif /* CONFIG_IEEE80211R */
238 #ifdef CONFIG_IEEE80211W
239 	if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
240 		ret = 1;
241 #endif /* CONFIG_IEEE80211W */
242 	if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
243 		ret = 1;
244 	return ret;
245 }
246 
247 
248 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
249 {
250 	struct wpa_authenticator *wpa_auth = eloop_ctx;
251 
252 	if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
253 		wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
254 			   "initialization.");
255 	} else {
256 		wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
257 		wpa_hexdump_key(MSG_DEBUG, "GMK",
258 				wpa_auth->group->GMK, WPA_GMK_LEN);
259 	}
260 
261 	if (wpa_auth->conf.wpa_gmk_rekey) {
262 		eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
263 				       wpa_rekey_gmk, wpa_auth, NULL);
264 	}
265 }
266 
267 
268 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
269 {
270 	struct wpa_authenticator *wpa_auth = eloop_ctx;
271 	struct wpa_group *group, *next;
272 
273 	wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
274 	group = wpa_auth->group;
275 	while (group) {
276 		wpa_group_get(wpa_auth, group);
277 
278 		group->GTKReKey = TRUE;
279 		do {
280 			group->changed = FALSE;
281 			wpa_group_sm_step(wpa_auth, group);
282 		} while (group->changed);
283 
284 		next = group->next;
285 		wpa_group_put(wpa_auth, group);
286 		group = next;
287 	}
288 
289 	if (wpa_auth->conf.wpa_group_rekey) {
290 		eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
291 				       0, wpa_rekey_gtk, wpa_auth, NULL);
292 	}
293 }
294 
295 
296 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
297 {
298 	struct wpa_authenticator *wpa_auth = eloop_ctx;
299 	struct wpa_state_machine *sm = timeout_ctx;
300 
301 	wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
302 	wpa_request_new_ptk(sm);
303 	wpa_sm_step(sm);
304 }
305 
306 
307 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
308 {
309 	if (sm->pmksa == ctx)
310 		sm->pmksa = NULL;
311 	return 0;
312 }
313 
314 
315 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
316 				   void *ctx)
317 {
318 	struct wpa_authenticator *wpa_auth = ctx;
319 	wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
320 }
321 
322 
323 static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
324 					  struct wpa_group *group)
325 {
326 	u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
327 	u8 rkey[32];
328 	unsigned long ptr;
329 
330 	if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
331 		return -1;
332 	wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
333 
334 	/*
335 	 * Counter = PRF-256(Random number, "Init Counter",
336 	 *                   Local MAC Address || Time)
337 	 */
338 	os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
339 	wpa_get_ntp_timestamp(buf + ETH_ALEN);
340 	ptr = (unsigned long) group;
341 	os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
342 	if (random_get_bytes(rkey, sizeof(rkey)) < 0)
343 		return -1;
344 
345 	if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
346 		     group->Counter, WPA_NONCE_LEN) < 0)
347 		return -1;
348 	wpa_hexdump_key(MSG_DEBUG, "Key Counter",
349 			group->Counter, WPA_NONCE_LEN);
350 
351 	return 0;
352 }
353 
354 
355 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
356 					 int vlan_id, int delay_init)
357 {
358 	struct wpa_group *group;
359 
360 	group = os_zalloc(sizeof(struct wpa_group));
361 	if (group == NULL)
362 		return NULL;
363 
364 	group->GTKAuthenticator = TRUE;
365 	group->vlan_id = vlan_id;
366 	group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
367 
368 	if (random_pool_ready() != 1) {
369 		wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
370 			   "for secure operations - update keys later when "
371 			   "the first station connects");
372 	}
373 
374 	/*
375 	 * Set initial GMK/Counter value here. The actual values that will be
376 	 * used in negotiations will be set once the first station tries to
377 	 * connect. This allows more time for collecting additional randomness
378 	 * on embedded devices.
379 	 */
380 	if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
381 		wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
382 			   "initialization.");
383 		os_free(group);
384 		return NULL;
385 	}
386 
387 	group->GInit = TRUE;
388 	if (delay_init) {
389 		wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
390 			   "until Beacon frames have been configured");
391 		/* Initialization is completed in wpa_init_keys(). */
392 	} else {
393 		wpa_group_sm_step(wpa_auth, group);
394 		group->GInit = FALSE;
395 		wpa_group_sm_step(wpa_auth, group);
396 	}
397 
398 	return group;
399 }
400 
401 
402 /**
403  * wpa_init - Initialize WPA authenticator
404  * @addr: Authenticator address
405  * @conf: Configuration for WPA authenticator
406  * @cb: Callback functions for WPA authenticator
407  * Returns: Pointer to WPA authenticator data or %NULL on failure
408  */
409 struct wpa_authenticator * wpa_init(const u8 *addr,
410 				    struct wpa_auth_config *conf,
411 				    struct wpa_auth_callbacks *cb)
412 {
413 	struct wpa_authenticator *wpa_auth;
414 
415 	wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
416 	if (wpa_auth == NULL)
417 		return NULL;
418 	os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
419 	os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
420 	os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
421 
422 	if (wpa_auth_gen_wpa_ie(wpa_auth)) {
423 		wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
424 		os_free(wpa_auth);
425 		return NULL;
426 	}
427 
428 	wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
429 	if (wpa_auth->group == NULL) {
430 		os_free(wpa_auth->wpa_ie);
431 		os_free(wpa_auth);
432 		return NULL;
433 	}
434 
435 	wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
436 						wpa_auth);
437 	if (wpa_auth->pmksa == NULL) {
438 		wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
439 		os_free(wpa_auth->group);
440 		os_free(wpa_auth->wpa_ie);
441 		os_free(wpa_auth);
442 		return NULL;
443 	}
444 
445 #ifdef CONFIG_IEEE80211R
446 	wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
447 	if (wpa_auth->ft_pmk_cache == NULL) {
448 		wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
449 		os_free(wpa_auth->group);
450 		os_free(wpa_auth->wpa_ie);
451 		pmksa_cache_auth_deinit(wpa_auth->pmksa);
452 		os_free(wpa_auth);
453 		return NULL;
454 	}
455 #endif /* CONFIG_IEEE80211R */
456 
457 	if (wpa_auth->conf.wpa_gmk_rekey) {
458 		eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
459 				       wpa_rekey_gmk, wpa_auth, NULL);
460 	}
461 
462 	if (wpa_auth->conf.wpa_group_rekey) {
463 		eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
464 				       wpa_rekey_gtk, wpa_auth, NULL);
465 	}
466 
467 #ifdef CONFIG_P2P
468 	if (WPA_GET_BE32(conf->ip_addr_start)) {
469 		int count = WPA_GET_BE32(conf->ip_addr_end) -
470 			WPA_GET_BE32(conf->ip_addr_start) + 1;
471 		if (count > 1000)
472 			count = 1000;
473 		if (count > 0)
474 			wpa_auth->ip_pool = bitfield_alloc(count);
475 	}
476 #endif /* CONFIG_P2P */
477 
478 	return wpa_auth;
479 }
480 
481 
482 int wpa_init_keys(struct wpa_authenticator *wpa_auth)
483 {
484 	struct wpa_group *group = wpa_auth->group;
485 
486 	wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
487 		   "keys");
488 	wpa_group_sm_step(wpa_auth, group);
489 	group->GInit = FALSE;
490 	wpa_group_sm_step(wpa_auth, group);
491 	if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
492 		return -1;
493 	return 0;
494 }
495 
496 
497 /**
498  * wpa_deinit - Deinitialize WPA authenticator
499  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
500  */
501 void wpa_deinit(struct wpa_authenticator *wpa_auth)
502 {
503 	struct wpa_group *group, *prev;
504 
505 	eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
506 	eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
507 
508 #ifdef CONFIG_PEERKEY
509 	while (wpa_auth->stsl_negotiations)
510 		wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
511 #endif /* CONFIG_PEERKEY */
512 
513 	pmksa_cache_auth_deinit(wpa_auth->pmksa);
514 
515 #ifdef CONFIG_IEEE80211R
516 	wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
517 	wpa_auth->ft_pmk_cache = NULL;
518 #endif /* CONFIG_IEEE80211R */
519 
520 #ifdef CONFIG_P2P
521 	bitfield_free(wpa_auth->ip_pool);
522 #endif /* CONFIG_P2P */
523 
524 
525 	os_free(wpa_auth->wpa_ie);
526 
527 	group = wpa_auth->group;
528 	while (group) {
529 		prev = group;
530 		group = group->next;
531 		os_free(prev);
532 	}
533 
534 	os_free(wpa_auth);
535 }
536 
537 
538 /**
539  * wpa_reconfig - Update WPA authenticator configuration
540  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
541  * @conf: Configuration for WPA authenticator
542  */
543 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
544 		 struct wpa_auth_config *conf)
545 {
546 	struct wpa_group *group;
547 	if (wpa_auth == NULL)
548 		return 0;
549 
550 	os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
551 	if (wpa_auth_gen_wpa_ie(wpa_auth)) {
552 		wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
553 		return -1;
554 	}
555 
556 	/*
557 	 * Reinitialize GTK to make sure it is suitable for the new
558 	 * configuration.
559 	 */
560 	group = wpa_auth->group;
561 	group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
562 	group->GInit = TRUE;
563 	wpa_group_sm_step(wpa_auth, group);
564 	group->GInit = FALSE;
565 	wpa_group_sm_step(wpa_auth, group);
566 
567 	return 0;
568 }
569 
570 
571 struct wpa_state_machine *
572 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
573 		  const u8 *p2p_dev_addr)
574 {
575 	struct wpa_state_machine *sm;
576 
577 	if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
578 		return NULL;
579 
580 	sm = os_zalloc(sizeof(struct wpa_state_machine));
581 	if (sm == NULL)
582 		return NULL;
583 	os_memcpy(sm->addr, addr, ETH_ALEN);
584 	if (p2p_dev_addr)
585 		os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
586 
587 	sm->wpa_auth = wpa_auth;
588 	sm->group = wpa_auth->group;
589 	wpa_group_get(sm->wpa_auth, sm->group);
590 
591 	return sm;
592 }
593 
594 
595 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
596 			    struct wpa_state_machine *sm)
597 {
598 	if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
599 		return -1;
600 
601 #ifdef CONFIG_IEEE80211R
602 	if (sm->ft_completed) {
603 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
604 				"FT authentication already completed - do not "
605 				"start 4-way handshake");
606 		/* Go to PTKINITDONE state to allow GTK rekeying */
607 		sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
608 		return 0;
609 	}
610 #endif /* CONFIG_IEEE80211R */
611 
612 	if (sm->started) {
613 		os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
614 		sm->ReAuthenticationRequest = TRUE;
615 		return wpa_sm_step(sm);
616 	}
617 
618 	wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
619 			"start authentication");
620 	sm->started = 1;
621 
622 	sm->Init = TRUE;
623 	if (wpa_sm_step(sm) == 1)
624 		return 1; /* should not really happen */
625 	sm->Init = FALSE;
626 	sm->AuthenticationRequest = TRUE;
627 	return wpa_sm_step(sm);
628 }
629 
630 
631 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
632 {
633 	/* WPA/RSN was not used - clear WPA state. This is needed if the STA
634 	 * reassociates back to the same AP while the previous entry for the
635 	 * STA has not yet been removed. */
636 	if (sm == NULL)
637 		return;
638 
639 	sm->wpa_key_mgmt = 0;
640 }
641 
642 
643 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
644 {
645 #ifdef CONFIG_P2P
646 	if (WPA_GET_BE32(sm->ip_addr)) {
647 		u32 start;
648 		wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
649 			   "address %u.%u.%u.%u from " MACSTR,
650 			   sm->ip_addr[0], sm->ip_addr[1],
651 			   sm->ip_addr[2], sm->ip_addr[3],
652 			   MAC2STR(sm->addr));
653 		start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
654 		bitfield_clear(sm->wpa_auth->ip_pool,
655 			       WPA_GET_BE32(sm->ip_addr) - start);
656 	}
657 #endif /* CONFIG_P2P */
658 	if (sm->GUpdateStationKeys) {
659 		sm->group->GKeyDoneStations--;
660 		sm->GUpdateStationKeys = FALSE;
661 	}
662 #ifdef CONFIG_IEEE80211R
663 	os_free(sm->assoc_resp_ftie);
664 	wpabuf_free(sm->ft_pending_req_ies);
665 #endif /* CONFIG_IEEE80211R */
666 	os_free(sm->last_rx_eapol_key);
667 	os_free(sm->wpa_ie);
668 	wpa_group_put(sm->wpa_auth, sm->group);
669 	os_free(sm);
670 }
671 
672 
673 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
674 {
675 	if (sm == NULL)
676 		return;
677 
678 	if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
679 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
680 				"strict rekeying - force GTK rekey since STA "
681 				"is leaving");
682 		eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
683 		eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
684 				       NULL);
685 	}
686 
687 	eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
688 	sm->pending_1_of_4_timeout = 0;
689 	eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
690 	eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
691 	if (sm->in_step_loop) {
692 		/* Must not free state machine while wpa_sm_step() is running.
693 		 * Freeing will be completed in the end of wpa_sm_step(). */
694 		wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
695 			   "machine deinit for " MACSTR, MAC2STR(sm->addr));
696 		sm->pending_deinit = 1;
697 	} else
698 		wpa_free_sta_sm(sm);
699 }
700 
701 
702 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
703 {
704 	if (sm == NULL)
705 		return;
706 
707 	sm->PTKRequest = TRUE;
708 	sm->PTK_valid = 0;
709 }
710 
711 
712 static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
713 				    const u8 *replay_counter)
714 {
715 	int i;
716 	for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
717 		if (!ctr[i].valid)
718 			break;
719 		if (os_memcmp(replay_counter, ctr[i].counter,
720 			      WPA_REPLAY_COUNTER_LEN) == 0)
721 			return 1;
722 	}
723 	return 0;
724 }
725 
726 
727 static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
728 					    const u8 *replay_counter)
729 {
730 	int i;
731 	for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
732 		if (ctr[i].valid &&
733 		    (replay_counter == NULL ||
734 		     os_memcmp(replay_counter, ctr[i].counter,
735 			       WPA_REPLAY_COUNTER_LEN) == 0))
736 			ctr[i].valid = FALSE;
737 	}
738 }
739 
740 
741 #ifdef CONFIG_IEEE80211R
742 static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
743 			       struct wpa_state_machine *sm,
744 			       struct wpa_eapol_ie_parse *kde)
745 {
746 	struct wpa_ie_data ie;
747 	struct rsn_mdie *mdie;
748 
749 	if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
750 	    ie.num_pmkid != 1 || ie.pmkid == NULL) {
751 		wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
752 			   "FT 4-way handshake message 2/4");
753 		return -1;
754 	}
755 
756 	os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
757 	wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
758 		    sm->sup_pmk_r1_name, PMKID_LEN);
759 
760 	if (!kde->mdie || !kde->ftie) {
761 		wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
762 			   "message 2/4", kde->mdie ? "FTIE" : "MDIE");
763 		return -1;
764 	}
765 
766 	mdie = (struct rsn_mdie *) (kde->mdie + 2);
767 	if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
768 	    os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
769 		      MOBILITY_DOMAIN_ID_LEN) != 0) {
770 		wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
771 		return -1;
772 	}
773 
774 	if (sm->assoc_resp_ftie &&
775 	    (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
776 	     os_memcmp(kde->ftie, sm->assoc_resp_ftie,
777 		       2 + sm->assoc_resp_ftie[1]) != 0)) {
778 		wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
779 		wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
780 			    kde->ftie, kde->ftie_len);
781 		wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
782 			    sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
783 		return -1;
784 	}
785 
786 	return 0;
787 }
788 #endif /* CONFIG_IEEE80211R */
789 
790 
791 static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
792 				    struct wpa_state_machine *sm, int group)
793 {
794 	/* Supplicant reported a Michael MIC error */
795 	wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
796 			 "received EAPOL-Key Error Request "
797 			 "(STA detected Michael MIC failure (group=%d))",
798 			 group);
799 
800 	if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
801 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
802 				"ignore Michael MIC failure report since "
803 				"group cipher is not TKIP");
804 	} else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
805 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
806 				"ignore Michael MIC failure report since "
807 				"pairwise cipher is not TKIP");
808 	} else {
809 		if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
810 			return 1; /* STA entry was removed */
811 		sm->dot11RSNAStatsTKIPRemoteMICFailures++;
812 		wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
813 	}
814 
815 	/*
816 	 * Error report is not a request for a new key handshake, but since
817 	 * Authenticator may do it, let's change the keys now anyway.
818 	 */
819 	wpa_request_new_ptk(sm);
820 	return 0;
821 }
822 
823 
824 static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
825 			      size_t data_len)
826 {
827 	struct wpa_ptk PTK;
828 	int ok = 0;
829 	const u8 *pmk = NULL;
830 
831 	for (;;) {
832 		if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
833 			pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
834 					       sm->p2p_dev_addr, pmk);
835 			if (pmk == NULL)
836 				break;
837 		} else
838 			pmk = sm->PMK;
839 
840 		wpa_derive_ptk(sm, sm->alt_SNonce, pmk, &PTK);
841 
842 		if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len)
843 		    == 0) {
844 			ok = 1;
845 			break;
846 		}
847 
848 		if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
849 			break;
850 	}
851 
852 	if (!ok) {
853 		wpa_printf(MSG_DEBUG,
854 			   "WPA: Earlier SNonce did not result in matching MIC");
855 		return -1;
856 	}
857 
858 	wpa_printf(MSG_DEBUG,
859 		   "WPA: Earlier SNonce resulted in matching MIC");
860 	sm->alt_snonce_valid = 0;
861 	os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
862 	os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
863 	sm->PTK_valid = TRUE;
864 
865 	return 0;
866 }
867 
868 
869 void wpa_receive(struct wpa_authenticator *wpa_auth,
870 		 struct wpa_state_machine *sm,
871 		 u8 *data, size_t data_len)
872 {
873 	struct ieee802_1x_hdr *hdr;
874 	struct wpa_eapol_key *key;
875 	struct wpa_eapol_key_192 *key192;
876 	u16 key_info, key_data_length;
877 	enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
878 	       SMK_M1, SMK_M3, SMK_ERROR } msg;
879 	char *msgtxt;
880 	struct wpa_eapol_ie_parse kde;
881 	int ft;
882 	const u8 *eapol_key_ie, *key_data;
883 	size_t eapol_key_ie_len, keyhdrlen, mic_len;
884 
885 	if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
886 		return;
887 
888 	mic_len = wpa_mic_len(sm->wpa_key_mgmt);
889 	keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
890 
891 	if (data_len < sizeof(*hdr) + keyhdrlen)
892 		return;
893 
894 	hdr = (struct ieee802_1x_hdr *) data;
895 	key = (struct wpa_eapol_key *) (hdr + 1);
896 	key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
897 	key_info = WPA_GET_BE16(key->key_info);
898 	if (mic_len == 24) {
899 		key_data = (const u8 *) (key192 + 1);
900 		key_data_length = WPA_GET_BE16(key192->key_data_length);
901 	} else {
902 		key_data = (const u8 *) (key + 1);
903 		key_data_length = WPA_GET_BE16(key->key_data_length);
904 	}
905 	wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
906 		   " key_info=0x%x type=%u key_data_length=%u",
907 		   MAC2STR(sm->addr), key_info, key->type, key_data_length);
908 	if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
909 		wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
910 			   "key_data overflow (%d > %lu)",
911 			   key_data_length,
912 			   (unsigned long) (data_len - sizeof(*hdr) -
913 					    keyhdrlen));
914 		return;
915 	}
916 
917 	if (sm->wpa == WPA_VERSION_WPA2) {
918 		if (key->type == EAPOL_KEY_TYPE_WPA) {
919 			/*
920 			 * Some deployed station implementations seem to send
921 			 * msg 4/4 with incorrect type value in WPA2 mode.
922 			 */
923 			wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
924 				   "with unexpected WPA type in RSN mode");
925 		} else if (key->type != EAPOL_KEY_TYPE_RSN) {
926 			wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
927 				   "unexpected type %d in RSN mode",
928 				   key->type);
929 			return;
930 		}
931 	} else {
932 		if (key->type != EAPOL_KEY_TYPE_WPA) {
933 			wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
934 				   "unexpected type %d in WPA mode",
935 				   key->type);
936 			return;
937 		}
938 	}
939 
940 	wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
941 		    WPA_NONCE_LEN);
942 	wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
943 		    key->replay_counter, WPA_REPLAY_COUNTER_LEN);
944 
945 	/* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
946 	 * are set */
947 
948 	if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
949 	    (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
950 		if (key_info & WPA_KEY_INFO_ERROR) {
951 			msg = SMK_ERROR;
952 			msgtxt = "SMK Error";
953 		} else {
954 			msg = SMK_M1;
955 			msgtxt = "SMK M1";
956 		}
957 	} else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
958 		msg = SMK_M3;
959 		msgtxt = "SMK M3";
960 	} else if (key_info & WPA_KEY_INFO_REQUEST) {
961 		msg = REQUEST;
962 		msgtxt = "Request";
963 	} else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
964 		msg = GROUP_2;
965 		msgtxt = "2/2 Group";
966 	} else if (key_data_length == 0) {
967 		msg = PAIRWISE_4;
968 		msgtxt = "4/4 Pairwise";
969 	} else {
970 		msg = PAIRWISE_2;
971 		msgtxt = "2/4 Pairwise";
972 	}
973 
974 	/* TODO: key_info type validation for PeerKey */
975 	if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
976 	    msg == GROUP_2) {
977 		u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
978 		if (sm->pairwise == WPA_CIPHER_CCMP ||
979 		    sm->pairwise == WPA_CIPHER_GCMP) {
980 			if (wpa_use_aes_cmac(sm) &&
981 			    sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
982 			    !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
983 			    ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
984 				wpa_auth_logger(wpa_auth, sm->addr,
985 						LOGGER_WARNING,
986 						"advertised support for "
987 						"AES-128-CMAC, but did not "
988 						"use it");
989 				return;
990 			}
991 
992 			if (!wpa_use_aes_cmac(sm) &&
993 			    ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
994 				wpa_auth_logger(wpa_auth, sm->addr,
995 						LOGGER_WARNING,
996 						"did not use HMAC-SHA1-AES "
997 						"with CCMP/GCMP");
998 				return;
999 			}
1000 		}
1001 
1002 		if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
1003 		    ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1004 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1005 					"did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1006 			return;
1007 		}
1008 	}
1009 
1010 	if (key_info & WPA_KEY_INFO_REQUEST) {
1011 		if (sm->req_replay_counter_used &&
1012 		    os_memcmp(key->replay_counter, sm->req_replay_counter,
1013 			      WPA_REPLAY_COUNTER_LEN) <= 0) {
1014 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1015 					"received EAPOL-Key request with "
1016 					"replayed counter");
1017 			return;
1018 		}
1019 	}
1020 
1021 	if (!(key_info & WPA_KEY_INFO_REQUEST) &&
1022 	    !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
1023 		int i;
1024 
1025 		if (msg == PAIRWISE_2 &&
1026 		    wpa_replay_counter_valid(sm->prev_key_replay,
1027 					     key->replay_counter) &&
1028 		    sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1029 		    os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1030 		{
1031 			/*
1032 			 * Some supplicant implementations (e.g., Windows XP
1033 			 * WZC) update SNonce for each EAPOL-Key 2/4. This
1034 			 * breaks the workaround on accepting any of the
1035 			 * pending requests, so allow the SNonce to be updated
1036 			 * even if we have already sent out EAPOL-Key 3/4.
1037 			 */
1038 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1039 					 "Process SNonce update from STA "
1040 					 "based on retransmitted EAPOL-Key "
1041 					 "1/4");
1042 			sm->update_snonce = 1;
1043 			os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1044 			sm->alt_snonce_valid = TRUE;
1045 			os_memcpy(sm->alt_replay_counter,
1046 				  sm->key_replay[0].counter,
1047 				  WPA_REPLAY_COUNTER_LEN);
1048 			goto continue_processing;
1049 		}
1050 
1051 		if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1052 		    sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1053 		    os_memcmp(key->replay_counter, sm->alt_replay_counter,
1054 			      WPA_REPLAY_COUNTER_LEN) == 0) {
1055 			/*
1056 			 * Supplicant may still be using the old SNonce since
1057 			 * there was two EAPOL-Key 2/4 messages and they had
1058 			 * different SNonce values.
1059 			 */
1060 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1061 					 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
1062 			goto continue_processing;
1063 		}
1064 
1065 		if (msg == PAIRWISE_2 &&
1066 		    wpa_replay_counter_valid(sm->prev_key_replay,
1067 					     key->replay_counter) &&
1068 		    sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1069 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1070 					 "ignore retransmitted EAPOL-Key %s - "
1071 					 "SNonce did not change", msgtxt);
1072 		} else {
1073 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1074 					 "received EAPOL-Key %s with "
1075 					 "unexpected replay counter", msgtxt);
1076 		}
1077 		for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1078 			if (!sm->key_replay[i].valid)
1079 				break;
1080 			wpa_hexdump(MSG_DEBUG, "pending replay counter",
1081 				    sm->key_replay[i].counter,
1082 				    WPA_REPLAY_COUNTER_LEN);
1083 		}
1084 		wpa_hexdump(MSG_DEBUG, "received replay counter",
1085 			    key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1086 		return;
1087 	}
1088 
1089 continue_processing:
1090 	switch (msg) {
1091 	case PAIRWISE_2:
1092 		if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
1093 		    sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1094 		    (!sm->update_snonce ||
1095 		     sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
1096 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1097 					 "received EAPOL-Key msg 2/4 in "
1098 					 "invalid state (%d) - dropped",
1099 					 sm->wpa_ptk_state);
1100 			return;
1101 		}
1102 		random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
1103 		if (sm->group->reject_4way_hs_for_entropy) {
1104 			/*
1105 			 * The system did not have enough entropy to generate
1106 			 * strong random numbers. Reject the first 4-way
1107 			 * handshake(s) and collect some entropy based on the
1108 			 * information from it. Once enough entropy is
1109 			 * available, the next atempt will trigger GMK/Key
1110 			 * Counter update and the station will be allowed to
1111 			 * continue.
1112 			 */
1113 			wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1114 				   "collect more entropy for random number "
1115 				   "generation");
1116 			random_mark_pool_ready();
1117 			wpa_sta_disconnect(wpa_auth, sm->addr);
1118 			return;
1119 		}
1120 		if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
1121 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1122 					 "received EAPOL-Key msg 2/4 with "
1123 					 "invalid Key Data contents");
1124 			return;
1125 		}
1126 		if (kde.rsn_ie) {
1127 			eapol_key_ie = kde.rsn_ie;
1128 			eapol_key_ie_len = kde.rsn_ie_len;
1129 		} else if (kde.osen) {
1130 			eapol_key_ie = kde.osen;
1131 			eapol_key_ie_len = kde.osen_len;
1132 		} else {
1133 			eapol_key_ie = kde.wpa_ie;
1134 			eapol_key_ie_len = kde.wpa_ie_len;
1135 		}
1136 		ft = sm->wpa == WPA_VERSION_WPA2 &&
1137 			wpa_key_mgmt_ft(sm->wpa_key_mgmt);
1138 		if (sm->wpa_ie == NULL ||
1139 		    wpa_compare_rsn_ie(ft,
1140 				       sm->wpa_ie, sm->wpa_ie_len,
1141 				       eapol_key_ie, eapol_key_ie_len)) {
1142 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1143 					"WPA IE from (Re)AssocReq did not "
1144 					"match with msg 2/4");
1145 			if (sm->wpa_ie) {
1146 				wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
1147 					    sm->wpa_ie, sm->wpa_ie_len);
1148 			}
1149 			wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1150 				    eapol_key_ie, eapol_key_ie_len);
1151 			/* MLME-DEAUTHENTICATE.request */
1152 			wpa_sta_disconnect(wpa_auth, sm->addr);
1153 			return;
1154 		}
1155 #ifdef CONFIG_IEEE80211R
1156 		if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
1157 			wpa_sta_disconnect(wpa_auth, sm->addr);
1158 			return;
1159 		}
1160 #endif /* CONFIG_IEEE80211R */
1161 #ifdef CONFIG_P2P
1162 		if (kde.ip_addr_req && kde.ip_addr_req[0] &&
1163 		    wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
1164 			int idx;
1165 			wpa_printf(MSG_DEBUG, "P2P: IP address requested in "
1166 				   "EAPOL-Key exchange");
1167 			idx = bitfield_get_first_zero(wpa_auth->ip_pool);
1168 			if (idx >= 0) {
1169 				u32 start = WPA_GET_BE32(wpa_auth->conf.
1170 							 ip_addr_start);
1171 				bitfield_set(wpa_auth->ip_pool, idx);
1172 				WPA_PUT_BE32(sm->ip_addr, start + idx);
1173 				wpa_printf(MSG_DEBUG, "P2P: Assigned IP "
1174 					   "address %u.%u.%u.%u to " MACSTR,
1175 					   sm->ip_addr[0], sm->ip_addr[1],
1176 					   sm->ip_addr[2], sm->ip_addr[3],
1177 					   MAC2STR(sm->addr));
1178 			}
1179 		}
1180 #endif /* CONFIG_P2P */
1181 		break;
1182 	case PAIRWISE_4:
1183 		if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1184 		    !sm->PTK_valid) {
1185 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1186 					 "received EAPOL-Key msg 4/4 in "
1187 					 "invalid state (%d) - dropped",
1188 					 sm->wpa_ptk_state);
1189 			return;
1190 		}
1191 		break;
1192 	case GROUP_2:
1193 		if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1194 		    || !sm->PTK_valid) {
1195 			wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1196 					 "received EAPOL-Key msg 2/2 in "
1197 					 "invalid state (%d) - dropped",
1198 					 sm->wpa_ptk_group_state);
1199 			return;
1200 		}
1201 		break;
1202 #ifdef CONFIG_PEERKEY
1203 	case SMK_M1:
1204 	case SMK_M3:
1205 	case SMK_ERROR:
1206 		if (!wpa_auth->conf.peerkey) {
1207 			wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1208 				   "PeerKey use disabled - ignoring message");
1209 			return;
1210 		}
1211 		if (!sm->PTK_valid) {
1212 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1213 					"received EAPOL-Key msg SMK in "
1214 					"invalid state - dropped");
1215 			return;
1216 		}
1217 		break;
1218 #else /* CONFIG_PEERKEY */
1219 	case SMK_M1:
1220 	case SMK_M3:
1221 	case SMK_ERROR:
1222 		return; /* STSL disabled - ignore SMK messages */
1223 #endif /* CONFIG_PEERKEY */
1224 	case REQUEST:
1225 		break;
1226 	}
1227 
1228 	wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1229 			 "received EAPOL-Key frame (%s)", msgtxt);
1230 
1231 	if (key_info & WPA_KEY_INFO_ACK) {
1232 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1233 				"received invalid EAPOL-Key: Key Ack set");
1234 		return;
1235 	}
1236 
1237 	if (!(key_info & WPA_KEY_INFO_MIC)) {
1238 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1239 				"received invalid EAPOL-Key: Key MIC not set");
1240 		return;
1241 	}
1242 
1243 	sm->MICVerified = FALSE;
1244 	if (sm->PTK_valid && !sm->update_snonce) {
1245 		if (wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data,
1246 				       data_len) &&
1247 		    (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1248 		     wpa_try_alt_snonce(sm, data, data_len))) {
1249 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1250 					"received EAPOL-Key with invalid MIC");
1251 			return;
1252 		}
1253 		sm->MICVerified = TRUE;
1254 		eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
1255 		sm->pending_1_of_4_timeout = 0;
1256 	}
1257 
1258 	if (key_info & WPA_KEY_INFO_REQUEST) {
1259 		if (sm->MICVerified) {
1260 			sm->req_replay_counter_used = 1;
1261 			os_memcpy(sm->req_replay_counter, key->replay_counter,
1262 				  WPA_REPLAY_COUNTER_LEN);
1263 		} else {
1264 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1265 					"received EAPOL-Key request with "
1266 					"invalid MIC");
1267 			return;
1268 		}
1269 
1270 		/*
1271 		 * TODO: should decrypt key data field if encryption was used;
1272 		 * even though MAC address KDE is not normally encrypted,
1273 		 * supplicant is allowed to encrypt it.
1274 		 */
1275 		if (msg == SMK_ERROR) {
1276 #ifdef CONFIG_PEERKEY
1277 			wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
1278 #endif /* CONFIG_PEERKEY */
1279 			return;
1280 		} else if (key_info & WPA_KEY_INFO_ERROR) {
1281 			if (wpa_receive_error_report(
1282 				    wpa_auth, sm,
1283 				    !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1284 				return; /* STA entry was removed */
1285 		} else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1286 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1287 					"received EAPOL-Key Request for new "
1288 					"4-Way Handshake");
1289 			wpa_request_new_ptk(sm);
1290 #ifdef CONFIG_PEERKEY
1291 		} else if (msg == SMK_M1) {
1292 			wpa_smk_m1(wpa_auth, sm, key, key_data,
1293 				   key_data_length);
1294 #endif /* CONFIG_PEERKEY */
1295 		} else if (key_data_length > 0 &&
1296 			   wpa_parse_kde_ies(key_data, key_data_length,
1297 					     &kde) == 0 &&
1298 			   kde.mac_addr) {
1299 		} else {
1300 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1301 					"received EAPOL-Key Request for GTK "
1302 					"rekeying");
1303 			eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1304 			wpa_rekey_gtk(wpa_auth, NULL);
1305 		}
1306 	} else {
1307 		/* Do not allow the same key replay counter to be reused. */
1308 		wpa_replay_counter_mark_invalid(sm->key_replay,
1309 						key->replay_counter);
1310 
1311 		if (msg == PAIRWISE_2) {
1312 			/*
1313 			 * Maintain a copy of the pending EAPOL-Key frames in
1314 			 * case the EAPOL-Key frame was retransmitted. This is
1315 			 * needed to allow EAPOL-Key msg 2/4 reply to another
1316 			 * pending msg 1/4 to update the SNonce to work around
1317 			 * unexpected supplicant behavior.
1318 			 */
1319 			os_memcpy(sm->prev_key_replay, sm->key_replay,
1320 				  sizeof(sm->key_replay));
1321 		} else {
1322 			os_memset(sm->prev_key_replay, 0,
1323 				  sizeof(sm->prev_key_replay));
1324 		}
1325 
1326 		/*
1327 		 * Make sure old valid counters are not accepted anymore and
1328 		 * do not get copied again.
1329 		 */
1330 		wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
1331 	}
1332 
1333 #ifdef CONFIG_PEERKEY
1334 	if (msg == SMK_M3) {
1335 		wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
1336 		return;
1337 	}
1338 #endif /* CONFIG_PEERKEY */
1339 
1340 	os_free(sm->last_rx_eapol_key);
1341 	sm->last_rx_eapol_key = os_malloc(data_len);
1342 	if (sm->last_rx_eapol_key == NULL)
1343 		return;
1344 	os_memcpy(sm->last_rx_eapol_key, data, data_len);
1345 	sm->last_rx_eapol_key_len = data_len;
1346 
1347 	sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
1348 	sm->EAPOLKeyReceived = TRUE;
1349 	sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1350 	sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1351 	os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1352 	wpa_sm_step(sm);
1353 }
1354 
1355 
1356 static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1357 			  const u8 *gnonce, u8 *gtk, size_t gtk_len)
1358 {
1359 	u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1360 	u8 *pos;
1361 	int ret = 0;
1362 
1363 	/* GTK = PRF-X(GMK, "Group key expansion",
1364 	 *	AA || GNonce || Time || random data)
1365 	 * The example described in the IEEE 802.11 standard uses only AA and
1366 	 * GNonce as inputs here. Add some more entropy since this derivation
1367 	 * is done only at the Authenticator and as such, does not need to be
1368 	 * exactly same.
1369 	 */
1370 	os_memcpy(data, addr, ETH_ALEN);
1371 	os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1372 	pos = data + ETH_ALEN + WPA_NONCE_LEN;
1373 	wpa_get_ntp_timestamp(pos);
1374 	pos += 8;
1375 	if (random_get_bytes(pos, 16) < 0)
1376 		ret = -1;
1377 
1378 #ifdef CONFIG_IEEE80211W
1379 	sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
1380 #else /* CONFIG_IEEE80211W */
1381 	if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1382 	    < 0)
1383 		ret = -1;
1384 #endif /* CONFIG_IEEE80211W */
1385 
1386 	return ret;
1387 }
1388 
1389 
1390 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1391 {
1392 	struct wpa_authenticator *wpa_auth = eloop_ctx;
1393 	struct wpa_state_machine *sm = timeout_ctx;
1394 
1395 	sm->pending_1_of_4_timeout = 0;
1396 	wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1397 	sm->TimeoutEvt = TRUE;
1398 	wpa_sm_step(sm);
1399 }
1400 
1401 
1402 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1403 		      struct wpa_state_machine *sm, int key_info,
1404 		      const u8 *key_rsc, const u8 *nonce,
1405 		      const u8 *kde, size_t kde_len,
1406 		      int keyidx, int encr, int force_version)
1407 {
1408 	struct ieee802_1x_hdr *hdr;
1409 	struct wpa_eapol_key *key;
1410 	struct wpa_eapol_key_192 *key192;
1411 	size_t len, mic_len, keyhdrlen;
1412 	int alg;
1413 	int key_data_len, pad_len = 0;
1414 	u8 *buf, *pos;
1415 	int version, pairwise;
1416 	int i;
1417 	u8 *key_data;
1418 
1419 	mic_len = wpa_mic_len(sm->wpa_key_mgmt);
1420 	keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
1421 
1422 	len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
1423 
1424 	if (force_version)
1425 		version = force_version;
1426 	else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1427 		 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt))
1428 		version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
1429 	else if (wpa_use_aes_cmac(sm))
1430 		version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1431 	else if (sm->pairwise != WPA_CIPHER_TKIP)
1432 		version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1433 	else
1434 		version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1435 
1436 	pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1437 
1438 	wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1439 		   "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1440 		   "encr=%d)",
1441 		   version,
1442 		   (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1443 		   (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1444 		   (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1445 		   (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1446 		   pairwise, (unsigned long) kde_len, keyidx, encr);
1447 
1448 	key_data_len = kde_len;
1449 
1450 	if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1451 	     sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1452 	     wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1453 	     version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1454 		pad_len = key_data_len % 8;
1455 		if (pad_len)
1456 			pad_len = 8 - pad_len;
1457 		key_data_len += pad_len + 8;
1458 	}
1459 
1460 	len += key_data_len;
1461 
1462 	hdr = os_zalloc(len);
1463 	if (hdr == NULL)
1464 		return;
1465 	hdr->version = wpa_auth->conf.eapol_version;
1466 	hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1467 	hdr->length = host_to_be16(len  - sizeof(*hdr));
1468 	key = (struct wpa_eapol_key *) (hdr + 1);
1469 	key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
1470 	key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
1471 
1472 	key->type = sm->wpa == WPA_VERSION_WPA2 ?
1473 		EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1474 	key_info |= version;
1475 	if (encr && sm->wpa == WPA_VERSION_WPA2)
1476 		key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1477 	if (sm->wpa != WPA_VERSION_WPA2)
1478 		key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1479 	WPA_PUT_BE16(key->key_info, key_info);
1480 
1481 	alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1482 	WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
1483 	if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1484 		WPA_PUT_BE16(key->key_length, 0);
1485 
1486 	/* FIX: STSL: what to use as key_replay_counter? */
1487 	for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1488 		sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1489 		os_memcpy(sm->key_replay[i].counter,
1490 			  sm->key_replay[i - 1].counter,
1491 			  WPA_REPLAY_COUNTER_LEN);
1492 	}
1493 	inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1494 	os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1495 		  WPA_REPLAY_COUNTER_LEN);
1496 	wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1497 		    key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1498 	sm->key_replay[0].valid = TRUE;
1499 
1500 	if (nonce)
1501 		os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1502 
1503 	if (key_rsc)
1504 		os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1505 
1506 	if (kde && !encr) {
1507 		os_memcpy(key_data, kde, kde_len);
1508 		if (mic_len == 24)
1509 			WPA_PUT_BE16(key192->key_data_length, kde_len);
1510 		else
1511 			WPA_PUT_BE16(key->key_data_length, kde_len);
1512 	} else if (encr && kde) {
1513 		buf = os_zalloc(key_data_len);
1514 		if (buf == NULL) {
1515 			os_free(hdr);
1516 			return;
1517 		}
1518 		pos = buf;
1519 		os_memcpy(pos, kde, kde_len);
1520 		pos += kde_len;
1521 
1522 		if (pad_len)
1523 			*pos++ = 0xdd;
1524 
1525 		wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1526 				buf, key_data_len);
1527 		if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1528 		    sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1529 		    wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1530 		    version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1531 			if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
1532 				     (key_data_len - 8) / 8, buf, key_data)) {
1533 				os_free(hdr);
1534 				os_free(buf);
1535 				return;
1536 			}
1537 			if (mic_len == 24)
1538 				WPA_PUT_BE16(key192->key_data_length,
1539 					     key_data_len);
1540 			else
1541 				WPA_PUT_BE16(key->key_data_length,
1542 					     key_data_len);
1543 #ifndef CONFIG_NO_RC4
1544 		} else if (sm->PTK.kek_len == 16) {
1545 			u8 ek[32];
1546 			os_memcpy(key->key_iv,
1547 				  sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1548 			inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1549 			os_memcpy(ek, key->key_iv, 16);
1550 			os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
1551 			os_memcpy(key_data, buf, key_data_len);
1552 			rc4_skip(ek, 32, 256, key_data, key_data_len);
1553 			if (mic_len == 24)
1554 				WPA_PUT_BE16(key192->key_data_length,
1555 					     key_data_len);
1556 			else
1557 				WPA_PUT_BE16(key->key_data_length,
1558 					     key_data_len);
1559 #endif /* CONFIG_NO_RC4 */
1560 		} else {
1561 			os_free(hdr);
1562 			os_free(buf);
1563 			return;
1564 		}
1565 		os_free(buf);
1566 	}
1567 
1568 	if (key_info & WPA_KEY_INFO_MIC) {
1569 		u8 *key_mic;
1570 
1571 		if (!sm->PTK_valid) {
1572 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1573 					"PTK not valid when sending EAPOL-Key "
1574 					"frame");
1575 			os_free(hdr);
1576 			return;
1577 		}
1578 
1579 		key_mic = key192->key_mic; /* same offset for key and key192 */
1580 		wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1581 				  sm->wpa_key_mgmt, version,
1582 				  (u8 *) hdr, len, key_mic);
1583 #ifdef CONFIG_TESTING_OPTIONS
1584 		if (!pairwise &&
1585 		    wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
1586 		    drand48() <
1587 		    wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1588 			wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1589 					"Corrupting group EAPOL-Key Key MIC");
1590 			key_mic[0]++;
1591 		}
1592 #endif /* CONFIG_TESTING_OPTIONS */
1593 	}
1594 
1595 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1596 			   1);
1597 	wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1598 			    sm->pairwise_set);
1599 	os_free(hdr);
1600 }
1601 
1602 
1603 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1604 			   struct wpa_state_machine *sm, int key_info,
1605 			   const u8 *key_rsc, const u8 *nonce,
1606 			   const u8 *kde, size_t kde_len,
1607 			   int keyidx, int encr)
1608 {
1609 	int timeout_ms;
1610 	int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1611 	int ctr;
1612 
1613 	if (sm == NULL)
1614 		return;
1615 
1616 	__wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1617 			 keyidx, encr, 0);
1618 
1619 	ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1620 	if (ctr == 1 && wpa_auth->conf.tx_status)
1621 		timeout_ms = pairwise ? eapol_key_timeout_first :
1622 			eapol_key_timeout_first_group;
1623 	else
1624 		timeout_ms = eapol_key_timeout_subseq;
1625 	if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1626 		sm->pending_1_of_4_timeout = 1;
1627 	wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1628 		   "counter %d)", timeout_ms, ctr);
1629 	eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1630 			       wpa_send_eapol_timeout, wpa_auth, sm);
1631 }
1632 
1633 
1634 static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
1635 			      size_t data_len)
1636 {
1637 	struct ieee802_1x_hdr *hdr;
1638 	struct wpa_eapol_key *key;
1639 	struct wpa_eapol_key_192 *key192;
1640 	u16 key_info;
1641 	int ret = 0;
1642 	u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
1643 	size_t mic_len = wpa_mic_len(akmp);
1644 
1645 	if (data_len < sizeof(*hdr) + sizeof(*key))
1646 		return -1;
1647 
1648 	hdr = (struct ieee802_1x_hdr *) data;
1649 	key = (struct wpa_eapol_key *) (hdr + 1);
1650 	key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
1651 	key_info = WPA_GET_BE16(key->key_info);
1652 	os_memcpy(mic, key192->key_mic, mic_len);
1653 	os_memset(key192->key_mic, 0, mic_len);
1654 	if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1655 			      key_info & WPA_KEY_INFO_TYPE_MASK,
1656 			      data, data_len, key192->key_mic) ||
1657 	    os_memcmp_const(mic, key192->key_mic, mic_len) != 0)
1658 		ret = -1;
1659 	os_memcpy(key192->key_mic, mic, mic_len);
1660 	return ret;
1661 }
1662 
1663 
1664 void wpa_remove_ptk(struct wpa_state_machine *sm)
1665 {
1666 	sm->PTK_valid = FALSE;
1667 	os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1668 	wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
1669 	sm->pairwise_set = FALSE;
1670 	eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1671 }
1672 
1673 
1674 int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
1675 {
1676 	int remove_ptk = 1;
1677 
1678 	if (sm == NULL)
1679 		return -1;
1680 
1681 	wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1682 			 "event %d notification", event);
1683 
1684 	switch (event) {
1685 	case WPA_AUTH:
1686 #ifdef CONFIG_MESH
1687 		/* PTKs are derived through AMPE */
1688 		if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1689 			/* not mesh */
1690 			break;
1691 		}
1692 		return 0;
1693 #endif /* CONFIG_MESH */
1694 	case WPA_ASSOC:
1695 		break;
1696 	case WPA_DEAUTH:
1697 	case WPA_DISASSOC:
1698 		sm->DeauthenticationRequest = TRUE;
1699 		break;
1700 	case WPA_REAUTH:
1701 	case WPA_REAUTH_EAPOL:
1702 		if (!sm->started) {
1703 			/*
1704 			 * When using WPS, we may end up here if the STA
1705 			 * manages to re-associate without the previous STA
1706 			 * entry getting removed. Consequently, we need to make
1707 			 * sure that the WPA state machines gets initialized
1708 			 * properly at this point.
1709 			 */
1710 			wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1711 				   "started - initialize now");
1712 			sm->started = 1;
1713 			sm->Init = TRUE;
1714 			if (wpa_sm_step(sm) == 1)
1715 				return 1; /* should not really happen */
1716 			sm->Init = FALSE;
1717 			sm->AuthenticationRequest = TRUE;
1718 			break;
1719 		}
1720 		if (sm->GUpdateStationKeys) {
1721 			/*
1722 			 * Reauthentication cancels the pending group key
1723 			 * update for this STA.
1724 			 */
1725 			sm->group->GKeyDoneStations--;
1726 			sm->GUpdateStationKeys = FALSE;
1727 			sm->PtkGroupInit = TRUE;
1728 		}
1729 		sm->ReAuthenticationRequest = TRUE;
1730 		break;
1731 	case WPA_ASSOC_FT:
1732 #ifdef CONFIG_IEEE80211R
1733 		wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1734 			   "after association");
1735 		wpa_ft_install_ptk(sm);
1736 
1737 		/* Using FT protocol, not WPA auth state machine */
1738 		sm->ft_completed = 1;
1739 		return 0;
1740 #else /* CONFIG_IEEE80211R */
1741 		break;
1742 #endif /* CONFIG_IEEE80211R */
1743 	}
1744 
1745 #ifdef CONFIG_IEEE80211R
1746 	sm->ft_completed = 0;
1747 #endif /* CONFIG_IEEE80211R */
1748 
1749 #ifdef CONFIG_IEEE80211W
1750 	if (sm->mgmt_frame_prot && event == WPA_AUTH)
1751 		remove_ptk = 0;
1752 #endif /* CONFIG_IEEE80211W */
1753 
1754 	if (remove_ptk) {
1755 		sm->PTK_valid = FALSE;
1756 		os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1757 
1758 		if (event != WPA_REAUTH_EAPOL)
1759 			wpa_remove_ptk(sm);
1760 	}
1761 
1762 	if (sm->in_step_loop) {
1763 		/*
1764 		 * wpa_sm_step() is already running - avoid recursive call to
1765 		 * it by making the existing loop process the new update.
1766 		 */
1767 		sm->changed = TRUE;
1768 		return 0;
1769 	}
1770 	return wpa_sm_step(sm);
1771 }
1772 
1773 
1774 SM_STATE(WPA_PTK, INITIALIZE)
1775 {
1776 	SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1777 	if (sm->Init) {
1778 		/* Init flag is not cleared here, so avoid busy
1779 		 * loop by claiming nothing changed. */
1780 		sm->changed = FALSE;
1781 	}
1782 
1783 	sm->keycount = 0;
1784 	if (sm->GUpdateStationKeys)
1785 		sm->group->GKeyDoneStations--;
1786 	sm->GUpdateStationKeys = FALSE;
1787 	if (sm->wpa == WPA_VERSION_WPA)
1788 		sm->PInitAKeys = FALSE;
1789 	if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1790 	       * Local AA > Remote AA)) */) {
1791 		sm->Pair = TRUE;
1792 	}
1793 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1794 	wpa_remove_ptk(sm);
1795 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1796 	sm->TimeoutCtr = 0;
1797 	if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1798 		wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1799 				   WPA_EAPOL_authorized, 0);
1800 	}
1801 }
1802 
1803 
1804 SM_STATE(WPA_PTK, DISCONNECT)
1805 {
1806 	SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1807 	sm->Disconnect = FALSE;
1808 	wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1809 }
1810 
1811 
1812 SM_STATE(WPA_PTK, DISCONNECTED)
1813 {
1814 	SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1815 	sm->DeauthenticationRequest = FALSE;
1816 }
1817 
1818 
1819 SM_STATE(WPA_PTK, AUTHENTICATION)
1820 {
1821 	SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1822 	os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1823 	sm->PTK_valid = FALSE;
1824 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1825 			   1);
1826 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1827 	sm->AuthenticationRequest = FALSE;
1828 }
1829 
1830 
1831 static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1832 				  struct wpa_group *group)
1833 {
1834 	if (group->first_sta_seen)
1835 		return;
1836 	/*
1837 	 * System has run bit further than at the time hostapd was started
1838 	 * potentially very early during boot up. This provides better chances
1839 	 * of collecting more randomness on embedded systems. Re-initialize the
1840 	 * GMK and Counter here to improve their strength if there was not
1841 	 * enough entropy available immediately after system startup.
1842 	 */
1843 	wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1844 		   "station");
1845 	if (random_pool_ready() != 1) {
1846 		wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1847 			   "to proceed - reject first 4-way handshake");
1848 		group->reject_4way_hs_for_entropy = TRUE;
1849 	} else {
1850 		group->first_sta_seen = TRUE;
1851 		group->reject_4way_hs_for_entropy = FALSE;
1852 	}
1853 
1854 	if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1855 	    wpa_gtk_update(wpa_auth, group) < 0 ||
1856 	    wpa_group_config_group_keys(wpa_auth, group) < 0) {
1857 		wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1858 		group->first_sta_seen = FALSE;
1859 		group->reject_4way_hs_for_entropy = TRUE;
1860 	}
1861 }
1862 
1863 
1864 SM_STATE(WPA_PTK, AUTHENTICATION2)
1865 {
1866 	SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1867 
1868 	wpa_group_ensure_init(sm->wpa_auth, sm->group);
1869 	sm->ReAuthenticationRequest = FALSE;
1870 
1871 	/*
1872 	 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1873 	 * ambiguous. The Authenticator state machine uses a counter that is
1874 	 * incremented by one for each 4-way handshake. However, the security
1875 	 * analysis of 4-way handshake points out that unpredictable nonces
1876 	 * help in preventing precomputation attacks. Instead of the state
1877 	 * machine definition, use an unpredictable nonce value here to provide
1878 	 * stronger protection against potential precomputation attacks.
1879 	 */
1880 	if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1881 		wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1882 			   "ANonce.");
1883 		sm->Disconnect = TRUE;
1884 		return;
1885 	}
1886 	wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1887 		    WPA_NONCE_LEN);
1888 	/* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1889 	 * logical place than INITIALIZE since AUTHENTICATION2 can be
1890 	 * re-entered on ReAuthenticationRequest without going through
1891 	 * INITIALIZE. */
1892 	sm->TimeoutCtr = 0;
1893 }
1894 
1895 
1896 static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1897 {
1898 	if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1899 		wpa_printf(MSG_ERROR,
1900 			   "WPA: Failed to get random data for ANonce");
1901 		sm->Disconnect = TRUE;
1902 		return -1;
1903 	}
1904 	wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1905 		    WPA_NONCE_LEN);
1906 	sm->TimeoutCtr = 0;
1907 	return 0;
1908 }
1909 
1910 
1911 SM_STATE(WPA_PTK, INITPMK)
1912 {
1913 	u8 msk[2 * PMK_LEN];
1914 	size_t len = 2 * PMK_LEN;
1915 
1916 	SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1917 #ifdef CONFIG_IEEE80211R
1918 	sm->xxkey_len = 0;
1919 #endif /* CONFIG_IEEE80211R */
1920 	if (sm->pmksa) {
1921 		wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1922 		os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1923 	} else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1924 		wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1925 			   "(len=%lu)", (unsigned long) len);
1926 		os_memcpy(sm->PMK, msk, PMK_LEN);
1927 #ifdef CONFIG_IEEE80211R
1928 		if (len >= 2 * PMK_LEN) {
1929 			os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1930 			sm->xxkey_len = PMK_LEN;
1931 		}
1932 #endif /* CONFIG_IEEE80211R */
1933 	} else {
1934 		wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
1935 			   sm->wpa_auth->cb.get_msk);
1936 		sm->Disconnect = TRUE;
1937 		return;
1938 	}
1939 	os_memset(msk, 0, sizeof(msk));
1940 
1941 	sm->req_replay_counter_used = 0;
1942 	/* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1943 	 * will break reauthentication since EAPOL state machines may not be
1944 	 * get into AUTHENTICATING state that clears keyRun before WPA state
1945 	 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1946 	 * state and takes PMK from the previously used AAA Key. This will
1947 	 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1948 	 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1949 	 * be good workaround for this issue. */
1950 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1951 }
1952 
1953 
1954 SM_STATE(WPA_PTK, INITPSK)
1955 {
1956 	const u8 *psk;
1957 	SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1958 	psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
1959 	if (psk) {
1960 		os_memcpy(sm->PMK, psk, PMK_LEN);
1961 #ifdef CONFIG_IEEE80211R
1962 		os_memcpy(sm->xxkey, psk, PMK_LEN);
1963 		sm->xxkey_len = PMK_LEN;
1964 #endif /* CONFIG_IEEE80211R */
1965 	}
1966 	sm->req_replay_counter_used = 0;
1967 }
1968 
1969 
1970 SM_STATE(WPA_PTK, PTKSTART)
1971 {
1972 	u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1973 	size_t pmkid_len = 0;
1974 
1975 	SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1976 	sm->PTKRequest = FALSE;
1977 	sm->TimeoutEvt = FALSE;
1978 	sm->alt_snonce_valid = FALSE;
1979 
1980 	sm->TimeoutCtr++;
1981 	if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1982 		/* No point in sending the EAPOL-Key - we will disconnect
1983 		 * immediately following this. */
1984 		return;
1985 	}
1986 
1987 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1988 			"sending 1/4 msg of 4-Way Handshake");
1989 	/*
1990 	 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1991 	 * one possible PSK for this STA.
1992 	 */
1993 	if (sm->wpa == WPA_VERSION_WPA2 &&
1994 	    wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1995 	    sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
1996 		pmkid = buf;
1997 		pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1998 		pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1999 		pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2000 		RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
2001 		if (sm->pmksa) {
2002 			os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2003 				  sm->pmksa->pmkid, PMKID_LEN);
2004 		} else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2005 			/* No KCK available to derive PMKID */
2006 			pmkid = NULL;
2007 		} else {
2008 			/*
2009 			 * Calculate PMKID since no PMKSA cache entry was
2010 			 * available with pre-calculated PMKID.
2011 			 */
2012 			rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
2013 				  sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2014 				  wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
2015 		}
2016 	}
2017 	wpa_send_eapol(sm->wpa_auth, sm,
2018 		       WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2019 		       sm->ANonce, pmkid, pmkid_len, 0, 0);
2020 }
2021 
2022 
2023 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
2024 			  const u8 *pmk, struct wpa_ptk *ptk)
2025 {
2026 #ifdef CONFIG_IEEE80211R
2027 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
2028 		return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
2029 #endif /* CONFIG_IEEE80211R */
2030 
2031 	return wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
2032 			      sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2033 			      ptk, sm->wpa_key_mgmt, sm->pairwise);
2034 }
2035 
2036 
2037 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2038 {
2039 	struct wpa_ptk PTK;
2040 	int ok = 0, psk_found = 0;
2041 	const u8 *pmk = NULL;
2042 
2043 	SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2044 	sm->EAPOLKeyReceived = FALSE;
2045 	sm->update_snonce = FALSE;
2046 
2047 	/* WPA with IEEE 802.1X: use the derived PMK from EAP
2048 	 * WPA-PSK: iterate through possible PSKs and select the one matching
2049 	 * the packet */
2050 	for (;;) {
2051 		if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2052 			pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2053 					       sm->p2p_dev_addr, pmk);
2054 			if (pmk == NULL)
2055 				break;
2056 			psk_found = 1;
2057 		} else
2058 			pmk = sm->PMK;
2059 
2060 		wpa_derive_ptk(sm, sm->SNonce, pmk, &PTK);
2061 
2062 		if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK,
2063 				       sm->last_rx_eapol_key,
2064 				       sm->last_rx_eapol_key_len) == 0) {
2065 			ok = 1;
2066 			break;
2067 		}
2068 
2069 		if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
2070 			break;
2071 	}
2072 
2073 	if (!ok) {
2074 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2075 				"invalid MIC in msg 2/4 of 4-Way Handshake");
2076 		if (psk_found)
2077 			wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
2078 		return;
2079 	}
2080 
2081 #ifdef CONFIG_IEEE80211R
2082 	if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2083 		/*
2084 		 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2085 		 * with the value we derived.
2086 		 */
2087 		if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2088 				    WPA_PMK_NAME_LEN) != 0) {
2089 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2090 					"PMKR1Name mismatch in FT 4-way "
2091 					"handshake");
2092 			wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2093 				    "Supplicant",
2094 				    sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2095 			wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2096 				    sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2097 			return;
2098 		}
2099 	}
2100 #endif /* CONFIG_IEEE80211R */
2101 
2102 	sm->pending_1_of_4_timeout = 0;
2103 	eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2104 
2105 	if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2106 		/* PSK may have changed from the previous choice, so update
2107 		 * state machine data based on whatever PSK was selected here.
2108 		 */
2109 		os_memcpy(sm->PMK, pmk, PMK_LEN);
2110 	}
2111 
2112 	sm->MICVerified = TRUE;
2113 
2114 	os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2115 	sm->PTK_valid = TRUE;
2116 }
2117 
2118 
2119 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2120 {
2121 	SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2122 	sm->TimeoutCtr = 0;
2123 }
2124 
2125 
2126 #ifdef CONFIG_IEEE80211W
2127 
2128 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2129 {
2130 	if (sm->mgmt_frame_prot) {
2131 		size_t len;
2132 		len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2133 		return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
2134 	}
2135 
2136 	return 0;
2137 }
2138 
2139 
2140 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2141 {
2142 	struct wpa_igtk_kde igtk;
2143 	struct wpa_group *gsm = sm->group;
2144 	u8 rsc[WPA_KEY_RSC_LEN];
2145 	size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2146 
2147 	if (!sm->mgmt_frame_prot)
2148 		return pos;
2149 
2150 	igtk.keyid[0] = gsm->GN_igtk;
2151 	igtk.keyid[1] = 0;
2152 	if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
2153 	    wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
2154 		os_memset(igtk.pn, 0, sizeof(igtk.pn));
2155 	else
2156 		os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
2157 	os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
2158 	if (sm->wpa_auth->conf.disable_gtk) {
2159 		/*
2160 		 * Provide unique random IGTK to each STA to prevent use of
2161 		 * IGTK in the BSS.
2162 		 */
2163 		if (random_get_bytes(igtk.igtk, len) < 0)
2164 			return pos;
2165 	}
2166 	pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
2167 			  (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2168 			  NULL, 0);
2169 
2170 	return pos;
2171 }
2172 
2173 #else /* CONFIG_IEEE80211W */
2174 
2175 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2176 {
2177 	return 0;
2178 }
2179 
2180 
2181 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2182 {
2183 	return pos;
2184 }
2185 
2186 #endif /* CONFIG_IEEE80211W */
2187 
2188 
2189 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2190 {
2191 	u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
2192 	size_t gtk_len, kde_len;
2193 	struct wpa_group *gsm = sm->group;
2194 	u8 *wpa_ie;
2195 	int wpa_ie_len, secure, keyidx, encr = 0;
2196 
2197 	SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2198 	sm->TimeoutEvt = FALSE;
2199 
2200 	sm->TimeoutCtr++;
2201 	if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
2202 		/* No point in sending the EAPOL-Key - we will disconnect
2203 		 * immediately following this. */
2204 		return;
2205 	}
2206 
2207 	/* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2208 	   GTK[GN], IGTK, [FTIE], [TIE * 2])
2209 	 */
2210 	os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2211 	wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2212 	/* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
2213 	wpa_ie = sm->wpa_auth->wpa_ie;
2214 	wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2215 	if (sm->wpa == WPA_VERSION_WPA &&
2216 	    (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2217 	    wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
2218 		/* WPA-only STA, remove RSN IE and possible MDIE */
2219 		wpa_ie = wpa_ie + wpa_ie[1] + 2;
2220 		if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2221 			wpa_ie = wpa_ie + wpa_ie[1] + 2;
2222 		wpa_ie_len = wpa_ie[1] + 2;
2223 	}
2224 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2225 			"sending 3/4 msg of 4-Way Handshake");
2226 	if (sm->wpa == WPA_VERSION_WPA2) {
2227 		/* WPA2 send GTK in the 4-way handshake */
2228 		secure = 1;
2229 		gtk = gsm->GTK[gsm->GN - 1];
2230 		gtk_len = gsm->GTK_len;
2231 		if (sm->wpa_auth->conf.disable_gtk) {
2232 			/*
2233 			 * Provide unique random GTK to each STA to prevent use
2234 			 * of GTK in the BSS.
2235 			 */
2236 			if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2237 				return;
2238 			gtk = dummy_gtk;
2239 		}
2240 		keyidx = gsm->GN;
2241 		_rsc = rsc;
2242 		encr = 1;
2243 	} else {
2244 		/* WPA does not include GTK in msg 3/4 */
2245 		secure = 0;
2246 		gtk = NULL;
2247 		gtk_len = 0;
2248 		keyidx = 0;
2249 		_rsc = NULL;
2250 		if (sm->rx_eapol_key_secure) {
2251 			/*
2252 			 * It looks like Windows 7 supplicant tries to use
2253 			 * Secure bit in msg 2/4 after having reported Michael
2254 			 * MIC failure and it then rejects the 4-way handshake
2255 			 * if msg 3/4 does not set Secure bit. Work around this
2256 			 * by setting the Secure bit here even in the case of
2257 			 * WPA if the supplicant used it first.
2258 			 */
2259 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2260 					"STA used Secure bit in WPA msg 2/4 - "
2261 					"set Secure for 3/4 as workaround");
2262 			secure = 1;
2263 		}
2264 	}
2265 
2266 	kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2267 	if (gtk)
2268 		kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
2269 #ifdef CONFIG_IEEE80211R
2270 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2271 		kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2272 		kde_len += 300; /* FTIE + 2 * TIE */
2273 	}
2274 #endif /* CONFIG_IEEE80211R */
2275 #ifdef CONFIG_P2P
2276 	if (WPA_GET_BE32(sm->ip_addr) > 0)
2277 		kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2278 #endif /* CONFIG_P2P */
2279 	kde = os_malloc(kde_len);
2280 	if (kde == NULL)
2281 		return;
2282 
2283 	pos = kde;
2284 	os_memcpy(pos, wpa_ie, wpa_ie_len);
2285 	pos += wpa_ie_len;
2286 #ifdef CONFIG_IEEE80211R
2287 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2288 		int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
2289 		if (res < 0) {
2290 			wpa_printf(MSG_ERROR, "FT: Failed to insert "
2291 				   "PMKR1Name into RSN IE in EAPOL-Key data");
2292 			os_free(kde);
2293 			return;
2294 		}
2295 		pos += res;
2296 	}
2297 #endif /* CONFIG_IEEE80211R */
2298 	if (gtk) {
2299 		u8 hdr[2];
2300 		hdr[0] = keyidx & 0x03;
2301 		hdr[1] = 0;
2302 		pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2303 				  gtk, gtk_len);
2304 	}
2305 	pos = ieee80211w_kde_add(sm, pos);
2306 
2307 #ifdef CONFIG_IEEE80211R
2308 	if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2309 		int res;
2310 		struct wpa_auth_config *conf;
2311 
2312 		conf = &sm->wpa_auth->conf;
2313 		res = wpa_write_ftie(conf, conf->r0_key_holder,
2314 				     conf->r0_key_holder_len,
2315 				     NULL, NULL, pos, kde + kde_len - pos,
2316 				     NULL, 0);
2317 		if (res < 0) {
2318 			wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2319 				   "into EAPOL-Key Key Data");
2320 			os_free(kde);
2321 			return;
2322 		}
2323 		pos += res;
2324 
2325 		/* TIE[ReassociationDeadline] (TU) */
2326 		*pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2327 		*pos++ = 5;
2328 		*pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2329 		WPA_PUT_LE32(pos, conf->reassociation_deadline);
2330 		pos += 4;
2331 
2332 		/* TIE[KeyLifetime] (seconds) */
2333 		*pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2334 		*pos++ = 5;
2335 		*pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2336 		WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2337 		pos += 4;
2338 	}
2339 #endif /* CONFIG_IEEE80211R */
2340 #ifdef CONFIG_P2P
2341 	if (WPA_GET_BE32(sm->ip_addr) > 0) {
2342 		u8 addr[3 * 4];
2343 		os_memcpy(addr, sm->ip_addr, 4);
2344 		os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2345 		os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2346 		pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2347 				  addr, sizeof(addr), NULL, 0);
2348 	}
2349 #endif /* CONFIG_P2P */
2350 
2351 	wpa_send_eapol(sm->wpa_auth, sm,
2352 		       (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
2353 		       WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2354 		       WPA_KEY_INFO_KEY_TYPE,
2355 		       _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2356 	os_free(kde);
2357 }
2358 
2359 
2360 SM_STATE(WPA_PTK, PTKINITDONE)
2361 {
2362 	SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2363 	sm->EAPOLKeyReceived = FALSE;
2364 	if (sm->Pair) {
2365 		enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2366 		int klen = wpa_cipher_key_len(sm->pairwise);
2367 		if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2368 				     sm->PTK.tk, klen)) {
2369 			wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2370 			return;
2371 		}
2372 		/* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2373 		sm->pairwise_set = TRUE;
2374 
2375 		if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2376 			eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2377 			eloop_register_timeout(sm->wpa_auth->conf.
2378 					       wpa_ptk_rekey, 0, wpa_rekey_ptk,
2379 					       sm->wpa_auth, sm);
2380 		}
2381 
2382 		if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2383 			wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2384 					   WPA_EAPOL_authorized, 1);
2385 		}
2386 	}
2387 
2388 	if (0 /* IBSS == TRUE */) {
2389 		sm->keycount++;
2390 		if (sm->keycount == 2) {
2391 			wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2392 					   WPA_EAPOL_portValid, 1);
2393 		}
2394 	} else {
2395 		wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2396 				   1);
2397 	}
2398 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2399 	wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2400 	if (sm->wpa == WPA_VERSION_WPA)
2401 		sm->PInitAKeys = TRUE;
2402 	else
2403 		sm->has_GTK = TRUE;
2404 	wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2405 			 "pairwise key handshake completed (%s)",
2406 			 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2407 
2408 #ifdef CONFIG_IEEE80211R
2409 	wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2410 #endif /* CONFIG_IEEE80211R */
2411 }
2412 
2413 
2414 SM_STEP(WPA_PTK)
2415 {
2416 	struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2417 
2418 	if (sm->Init)
2419 		SM_ENTER(WPA_PTK, INITIALIZE);
2420 	else if (sm->Disconnect
2421 		 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2422 		wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2423 				"WPA_PTK: sm->Disconnect");
2424 		SM_ENTER(WPA_PTK, DISCONNECT);
2425 	}
2426 	else if (sm->DeauthenticationRequest)
2427 		SM_ENTER(WPA_PTK, DISCONNECTED);
2428 	else if (sm->AuthenticationRequest)
2429 		SM_ENTER(WPA_PTK, AUTHENTICATION);
2430 	else if (sm->ReAuthenticationRequest)
2431 		SM_ENTER(WPA_PTK, AUTHENTICATION2);
2432 	else if (sm->PTKRequest) {
2433 		if (wpa_auth_sm_ptk_update(sm) < 0)
2434 			SM_ENTER(WPA_PTK, DISCONNECTED);
2435 		else
2436 			SM_ENTER(WPA_PTK, PTKSTART);
2437 	} else switch (sm->wpa_ptk_state) {
2438 	case WPA_PTK_INITIALIZE:
2439 		break;
2440 	case WPA_PTK_DISCONNECT:
2441 		SM_ENTER(WPA_PTK, DISCONNECTED);
2442 		break;
2443 	case WPA_PTK_DISCONNECTED:
2444 		SM_ENTER(WPA_PTK, INITIALIZE);
2445 		break;
2446 	case WPA_PTK_AUTHENTICATION:
2447 		SM_ENTER(WPA_PTK, AUTHENTICATION2);
2448 		break;
2449 	case WPA_PTK_AUTHENTICATION2:
2450 		if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
2451 		    wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2452 				       WPA_EAPOL_keyRun) > 0)
2453 			SM_ENTER(WPA_PTK, INITPMK);
2454 		else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
2455 			 /* FIX: && 802.1X::keyRun */)
2456 			SM_ENTER(WPA_PTK, INITPSK);
2457 		break;
2458 	case WPA_PTK_INITPMK:
2459 		if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2460 				       WPA_EAPOL_keyAvailable) > 0)
2461 			SM_ENTER(WPA_PTK, PTKSTART);
2462 		else {
2463 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
2464 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2465 					"INITPMK - keyAvailable = false");
2466 			SM_ENTER(WPA_PTK, DISCONNECT);
2467 		}
2468 		break;
2469 	case WPA_PTK_INITPSK:
2470 		if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2471 				     NULL))
2472 			SM_ENTER(WPA_PTK, PTKSTART);
2473 		else {
2474 			wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2475 					"no PSK configured for the STA");
2476 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
2477 			SM_ENTER(WPA_PTK, DISCONNECT);
2478 		}
2479 		break;
2480 	case WPA_PTK_PTKSTART:
2481 		if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2482 		    sm->EAPOLKeyPairwise)
2483 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2484 		else if (sm->TimeoutCtr >
2485 			 (int) dot11RSNAConfigPairwiseUpdateCount) {
2486 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
2487 			wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2488 					 "PTKSTART: Retry limit %d reached",
2489 					 dot11RSNAConfigPairwiseUpdateCount);
2490 			SM_ENTER(WPA_PTK, DISCONNECT);
2491 		} else if (sm->TimeoutEvt)
2492 			SM_ENTER(WPA_PTK, PTKSTART);
2493 		break;
2494 	case WPA_PTK_PTKCALCNEGOTIATING:
2495 		if (sm->MICVerified)
2496 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2497 		else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2498 			 sm->EAPOLKeyPairwise)
2499 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2500 		else if (sm->TimeoutEvt)
2501 			SM_ENTER(WPA_PTK, PTKSTART);
2502 		break;
2503 	case WPA_PTK_PTKCALCNEGOTIATING2:
2504 		SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2505 		break;
2506 	case WPA_PTK_PTKINITNEGOTIATING:
2507 		if (sm->update_snonce)
2508 			SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2509 		else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2510 			 sm->EAPOLKeyPairwise && sm->MICVerified)
2511 			SM_ENTER(WPA_PTK, PTKINITDONE);
2512 		else if (sm->TimeoutCtr >
2513 			 (int) dot11RSNAConfigPairwiseUpdateCount) {
2514 			wpa_auth->dot11RSNA4WayHandshakeFailures++;
2515 			wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2516 					 "PTKINITNEGOTIATING: Retry limit %d "
2517 					 "reached",
2518 					 dot11RSNAConfigPairwiseUpdateCount);
2519 			SM_ENTER(WPA_PTK, DISCONNECT);
2520 		} else if (sm->TimeoutEvt)
2521 			SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2522 		break;
2523 	case WPA_PTK_PTKINITDONE:
2524 		break;
2525 	}
2526 }
2527 
2528 
2529 SM_STATE(WPA_PTK_GROUP, IDLE)
2530 {
2531 	SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2532 	if (sm->Init) {
2533 		/* Init flag is not cleared here, so avoid busy
2534 		 * loop by claiming nothing changed. */
2535 		sm->changed = FALSE;
2536 	}
2537 	sm->GTimeoutCtr = 0;
2538 }
2539 
2540 
2541 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2542 {
2543 	u8 rsc[WPA_KEY_RSC_LEN];
2544 	struct wpa_group *gsm = sm->group;
2545 	const u8 *kde;
2546 	u8 *kde_buf = NULL, *pos, hdr[2];
2547 	size_t kde_len;
2548 	u8 *gtk, dummy_gtk[32];
2549 
2550 	SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
2551 
2552 	sm->GTimeoutCtr++;
2553 	if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2554 		/* No point in sending the EAPOL-Key - we will disconnect
2555 		 * immediately following this. */
2556 		return;
2557 	}
2558 
2559 	if (sm->wpa == WPA_VERSION_WPA)
2560 		sm->PInitAKeys = FALSE;
2561 	sm->TimeoutEvt = FALSE;
2562 	/* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2563 	os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2564 	if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2565 		wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2566 	wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2567 			"sending 1/2 msg of Group Key Handshake");
2568 
2569 	gtk = gsm->GTK[gsm->GN - 1];
2570 	if (sm->wpa_auth->conf.disable_gtk) {
2571 		/*
2572 		 * Provide unique random GTK to each STA to prevent use
2573 		 * of GTK in the BSS.
2574 		 */
2575 		if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
2576 			return;
2577 		gtk = dummy_gtk;
2578 	}
2579 	if (sm->wpa == WPA_VERSION_WPA2) {
2580 		kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2581 			ieee80211w_kde_len(sm);
2582 		kde_buf = os_malloc(kde_len);
2583 		if (kde_buf == NULL)
2584 			return;
2585 
2586 		kde = pos = kde_buf;
2587 		hdr[0] = gsm->GN & 0x03;
2588 		hdr[1] = 0;
2589 		pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2590 				  gtk, gsm->GTK_len);
2591 		pos = ieee80211w_kde_add(sm, pos);
2592 		kde_len = pos - kde;
2593 	} else {
2594 		kde = gtk;
2595 		kde_len = gsm->GTK_len;
2596 	}
2597 
2598 	wpa_send_eapol(sm->wpa_auth, sm,
2599 		       WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2600 		       WPA_KEY_INFO_ACK |
2601 		       (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2602 		       rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1);
2603 
2604 	os_free(kde_buf);
2605 }
2606 
2607 
2608 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2609 {
2610 	SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2611 	sm->EAPOLKeyReceived = FALSE;
2612 	if (sm->GUpdateStationKeys)
2613 		sm->group->GKeyDoneStations--;
2614 	sm->GUpdateStationKeys = FALSE;
2615 	sm->GTimeoutCtr = 0;
2616 	/* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2617 	wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2618 			 "group key handshake completed (%s)",
2619 			 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2620 	sm->has_GTK = TRUE;
2621 }
2622 
2623 
2624 SM_STATE(WPA_PTK_GROUP, KEYERROR)
2625 {
2626 	SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2627 	if (sm->GUpdateStationKeys)
2628 		sm->group->GKeyDoneStations--;
2629 	sm->GUpdateStationKeys = FALSE;
2630 	sm->Disconnect = TRUE;
2631 }
2632 
2633 
2634 SM_STEP(WPA_PTK_GROUP)
2635 {
2636 	if (sm->Init || sm->PtkGroupInit) {
2637 		SM_ENTER(WPA_PTK_GROUP, IDLE);
2638 		sm->PtkGroupInit = FALSE;
2639 	} else switch (sm->wpa_ptk_group_state) {
2640 	case WPA_PTK_GROUP_IDLE:
2641 		if (sm->GUpdateStationKeys ||
2642 		    (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2643 			SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2644 		break;
2645 	case WPA_PTK_GROUP_REKEYNEGOTIATING:
2646 		if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2647 		    !sm->EAPOLKeyPairwise && sm->MICVerified)
2648 			SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2649 		else if (sm->GTimeoutCtr >
2650 			 (int) dot11RSNAConfigGroupUpdateCount)
2651 			SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2652 		else if (sm->TimeoutEvt)
2653 			SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2654 		break;
2655 	case WPA_PTK_GROUP_KEYERROR:
2656 		SM_ENTER(WPA_PTK_GROUP, IDLE);
2657 		break;
2658 	case WPA_PTK_GROUP_REKEYESTABLISHED:
2659 		SM_ENTER(WPA_PTK_GROUP, IDLE);
2660 		break;
2661 	}
2662 }
2663 
2664 
2665 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2666 			  struct wpa_group *group)
2667 {
2668 	int ret = 0;
2669 
2670 	os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2671 	inc_byte_array(group->Counter, WPA_NONCE_LEN);
2672 	if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2673 			   wpa_auth->addr, group->GNonce,
2674 			   group->GTK[group->GN - 1], group->GTK_len) < 0)
2675 		ret = -1;
2676 	wpa_hexdump_key(MSG_DEBUG, "GTK",
2677 			group->GTK[group->GN - 1], group->GTK_len);
2678 
2679 #ifdef CONFIG_IEEE80211W
2680 	if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2681 		size_t len;
2682 		len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2683 		os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2684 		inc_byte_array(group->Counter, WPA_NONCE_LEN);
2685 		if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2686 				   wpa_auth->addr, group->GNonce,
2687 				   group->IGTK[group->GN_igtk - 4], len) < 0)
2688 			ret = -1;
2689 		wpa_hexdump_key(MSG_DEBUG, "IGTK",
2690 				group->IGTK[group->GN_igtk - 4], len);
2691 	}
2692 #endif /* CONFIG_IEEE80211W */
2693 
2694 	return ret;
2695 }
2696 
2697 
2698 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2699 			       struct wpa_group *group)
2700 {
2701 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2702 		   "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2703 	group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2704 	group->wpa_group_state = WPA_GROUP_GTK_INIT;
2705 
2706 	/* GTK[0..N] = 0 */
2707 	os_memset(group->GTK, 0, sizeof(group->GTK));
2708 	group->GN = 1;
2709 	group->GM = 2;
2710 #ifdef CONFIG_IEEE80211W
2711 	group->GN_igtk = 4;
2712 	group->GM_igtk = 5;
2713 #endif /* CONFIG_IEEE80211W */
2714 	/* GTK[GN] = CalcGTK() */
2715 	wpa_gtk_update(wpa_auth, group);
2716 }
2717 
2718 
2719 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2720 {
2721 	if (ctx != NULL && ctx != sm->group)
2722 		return 0;
2723 
2724 	if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2725 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2726 				"Not in PTKINITDONE; skip Group Key update");
2727 		sm->GUpdateStationKeys = FALSE;
2728 		return 0;
2729 	}
2730 	if (sm->GUpdateStationKeys) {
2731 		/*
2732 		 * This should not really happen, so add a debug log entry.
2733 		 * Since we clear the GKeyDoneStations before the loop, the
2734 		 * station needs to be counted here anyway.
2735 		 */
2736 		wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2737 				"GUpdateStationKeys was already set when "
2738 				"marking station for GTK rekeying");
2739 	}
2740 
2741 	/* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
2742 	if (sm->is_wnmsleep)
2743 		return 0;
2744 
2745 	sm->group->GKeyDoneStations++;
2746 	sm->GUpdateStationKeys = TRUE;
2747 
2748 	wpa_sm_step(sm);
2749 	return 0;
2750 }
2751 
2752 
2753 #ifdef CONFIG_WNM
2754 /* update GTK when exiting WNM-Sleep Mode */
2755 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
2756 {
2757 	if (sm == NULL || sm->is_wnmsleep)
2758 		return;
2759 
2760 	wpa_group_update_sta(sm, NULL);
2761 }
2762 
2763 
2764 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
2765 {
2766 	if (sm)
2767 		sm->is_wnmsleep = !!flag;
2768 }
2769 
2770 
2771 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2772 {
2773 	struct wpa_group *gsm = sm->group;
2774 	u8 *start = pos;
2775 
2776 	/*
2777 	 * GTK subelement:
2778 	 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2779 	 * Key[5..32]
2780 	 */
2781 	*pos++ = WNM_SLEEP_SUBELEM_GTK;
2782 	*pos++ = 11 + gsm->GTK_len;
2783 	/* Key ID in B0-B1 of Key Info */
2784 	WPA_PUT_LE16(pos, gsm->GN & 0x03);
2785 	pos += 2;
2786 	*pos++ = gsm->GTK_len;
2787 	if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
2788 		return 0;
2789 	pos += 8;
2790 	os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2791 	pos += gsm->GTK_len;
2792 
2793 	wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
2794 		   gsm->GN);
2795 	wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
2796 			gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2797 
2798 	return pos - start;
2799 }
2800 
2801 
2802 #ifdef CONFIG_IEEE80211W
2803 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2804 {
2805 	struct wpa_group *gsm = sm->group;
2806 	u8 *start = pos;
2807 	size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2808 
2809 	/*
2810 	 * IGTK subelement:
2811 	 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
2812 	 */
2813 	*pos++ = WNM_SLEEP_SUBELEM_IGTK;
2814 	*pos++ = 2 + 6 + len;
2815 	WPA_PUT_LE16(pos, gsm->GN_igtk);
2816 	pos += 2;
2817 	if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
2818 		return 0;
2819 	pos += 6;
2820 
2821 	os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
2822 	pos += len;
2823 
2824 	wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
2825 		   gsm->GN_igtk);
2826 	wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
2827 			gsm->IGTK[gsm->GN_igtk - 4], len);
2828 
2829 	return pos - start;
2830 }
2831 #endif /* CONFIG_IEEE80211W */
2832 #endif /* CONFIG_WNM */
2833 
2834 
2835 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2836 			      struct wpa_group *group)
2837 {
2838 	int tmp;
2839 
2840 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2841 		   "SETKEYS (VLAN-ID %d)", group->vlan_id);
2842 	group->changed = TRUE;
2843 	group->wpa_group_state = WPA_GROUP_SETKEYS;
2844 	group->GTKReKey = FALSE;
2845 	tmp = group->GM;
2846 	group->GM = group->GN;
2847 	group->GN = tmp;
2848 #ifdef CONFIG_IEEE80211W
2849 	tmp = group->GM_igtk;
2850 	group->GM_igtk = group->GN_igtk;
2851 	group->GN_igtk = tmp;
2852 #endif /* CONFIG_IEEE80211W */
2853 	/* "GKeyDoneStations = GNoStations" is done in more robust way by
2854 	 * counting the STAs that are marked with GUpdateStationKeys instead of
2855 	 * including all STAs that could be in not-yet-completed state. */
2856 	wpa_gtk_update(wpa_auth, group);
2857 
2858 	if (group->GKeyDoneStations) {
2859 		wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2860 			   "GKeyDoneStations=%d when starting new GTK rekey",
2861 			   group->GKeyDoneStations);
2862 		group->GKeyDoneStations = 0;
2863 	}
2864 	wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
2865 	wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2866 		   group->GKeyDoneStations);
2867 }
2868 
2869 
2870 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2871 				       struct wpa_group *group)
2872 {
2873 	int ret = 0;
2874 
2875 	if (wpa_auth_set_key(wpa_auth, group->vlan_id,
2876 			     wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
2877 			     broadcast_ether_addr, group->GN,
2878 			     group->GTK[group->GN - 1], group->GTK_len) < 0)
2879 		ret = -1;
2880 
2881 #ifdef CONFIG_IEEE80211W
2882 	if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2883 		enum wpa_alg alg;
2884 		size_t len;
2885 
2886 		alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
2887 		len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2888 
2889 		if (ret == 0 &&
2890 		    wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
2891 				     broadcast_ether_addr, group->GN_igtk,
2892 				     group->IGTK[group->GN_igtk - 4], len) < 0)
2893 			ret = -1;
2894 	}
2895 #endif /* CONFIG_IEEE80211W */
2896 
2897 	return ret;
2898 }
2899 
2900 
2901 static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
2902 {
2903 	if (sm->group == ctx) {
2904 		wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
2905 			   " for discconnection due to fatal failure",
2906 			   MAC2STR(sm->addr));
2907 		sm->Disconnect = TRUE;
2908 	}
2909 
2910 	return 0;
2911 }
2912 
2913 
2914 static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
2915 				    struct wpa_group *group)
2916 {
2917 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
2918 	group->changed = TRUE;
2919 	group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
2920 	wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
2921 }
2922 
2923 
2924 static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2925 				 struct wpa_group *group)
2926 {
2927 	wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2928 		   "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2929 	group->changed = TRUE;
2930 	group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2931 
2932 	if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
2933 		wpa_group_fatal_failure(wpa_auth, group);
2934 		return -1;
2935 	}
2936 
2937 	return 0;
2938 }
2939 
2940 
2941 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2942 			      struct wpa_group *group)
2943 {
2944 	if (group->GInit) {
2945 		wpa_group_gtk_init(wpa_auth, group);
2946 	} else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
2947 		/* Do not allow group operations */
2948 	} else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2949 		   group->GTKAuthenticator) {
2950 		wpa_group_setkeysdone(wpa_auth, group);
2951 	} else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2952 		   group->GTKReKey) {
2953 		wpa_group_setkeys(wpa_auth, group);
2954 	} else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2955 		if (group->GKeyDoneStations == 0)
2956 			wpa_group_setkeysdone(wpa_auth, group);
2957 		else if (group->GTKReKey)
2958 			wpa_group_setkeys(wpa_auth, group);
2959 	}
2960 }
2961 
2962 
2963 static int wpa_sm_step(struct wpa_state_machine *sm)
2964 {
2965 	if (sm == NULL)
2966 		return 0;
2967 
2968 	if (sm->in_step_loop) {
2969 		/* This should not happen, but if it does, make sure we do not
2970 		 * end up freeing the state machine too early by exiting the
2971 		 * recursive call. */
2972 		wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2973 		return 0;
2974 	}
2975 
2976 	sm->in_step_loop = 1;
2977 	do {
2978 		if (sm->pending_deinit)
2979 			break;
2980 
2981 		sm->changed = FALSE;
2982 		sm->wpa_auth->group->changed = FALSE;
2983 
2984 		SM_STEP_RUN(WPA_PTK);
2985 		if (sm->pending_deinit)
2986 			break;
2987 		SM_STEP_RUN(WPA_PTK_GROUP);
2988 		if (sm->pending_deinit)
2989 			break;
2990 		wpa_group_sm_step(sm->wpa_auth, sm->group);
2991 	} while (sm->changed || sm->wpa_auth->group->changed);
2992 	sm->in_step_loop = 0;
2993 
2994 	if (sm->pending_deinit) {
2995 		wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2996 			   "machine deinit for " MACSTR, MAC2STR(sm->addr));
2997 		wpa_free_sta_sm(sm);
2998 		return 1;
2999 	}
3000 	return 0;
3001 }
3002 
3003 
3004 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3005 {
3006 	struct wpa_state_machine *sm = eloop_ctx;
3007 	wpa_sm_step(sm);
3008 }
3009 
3010 
3011 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3012 {
3013 	if (sm == NULL)
3014 		return;
3015 	eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3016 }
3017 
3018 
3019 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3020 {
3021 	int tmp, i;
3022 	struct wpa_group *group;
3023 
3024 	if (wpa_auth == NULL)
3025 		return;
3026 
3027 	group = wpa_auth->group;
3028 
3029 	for (i = 0; i < 2; i++) {
3030 		tmp = group->GM;
3031 		group->GM = group->GN;
3032 		group->GN = tmp;
3033 #ifdef CONFIG_IEEE80211W
3034 		tmp = group->GM_igtk;
3035 		group->GM_igtk = group->GN_igtk;
3036 		group->GN_igtk = tmp;
3037 #endif /* CONFIG_IEEE80211W */
3038 		wpa_gtk_update(wpa_auth, group);
3039 		wpa_group_config_group_keys(wpa_auth, group);
3040 	}
3041 }
3042 
3043 
3044 static const char * wpa_bool_txt(int val)
3045 {
3046 	return val ? "TRUE" : "FALSE";
3047 }
3048 
3049 
3050 #define RSN_SUITE "%02x-%02x-%02x-%d"
3051 #define RSN_SUITE_ARG(s) \
3052 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3053 
3054 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3055 {
3056 	int len = 0, ret;
3057 	char pmkid_txt[PMKID_LEN * 2 + 1];
3058 #ifdef CONFIG_RSN_PREAUTH
3059 	const int preauth = 1;
3060 #else /* CONFIG_RSN_PREAUTH */
3061 	const int preauth = 0;
3062 #endif /* CONFIG_RSN_PREAUTH */
3063 
3064 	if (wpa_auth == NULL)
3065 		return len;
3066 
3067 	ret = os_snprintf(buf + len, buflen - len,
3068 			  "dot11RSNAOptionImplemented=TRUE\n"
3069 			  "dot11RSNAPreauthenticationImplemented=%s\n"
3070 			  "dot11RSNAEnabled=%s\n"
3071 			  "dot11RSNAPreauthenticationEnabled=%s\n",
3072 			  wpa_bool_txt(preauth),
3073 			  wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3074 			  wpa_bool_txt(wpa_auth->conf.rsn_preauth));
3075 	if (os_snprintf_error(buflen - len, ret))
3076 		return len;
3077 	len += ret;
3078 
3079 	wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3080 			 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3081 
3082 	ret = os_snprintf(
3083 		buf + len, buflen - len,
3084 		"dot11RSNAConfigVersion=%u\n"
3085 		"dot11RSNAConfigPairwiseKeysSupported=9999\n"
3086 		/* FIX: dot11RSNAConfigGroupCipher */
3087 		/* FIX: dot11RSNAConfigGroupRekeyMethod */
3088 		/* FIX: dot11RSNAConfigGroupRekeyTime */
3089 		/* FIX: dot11RSNAConfigGroupRekeyPackets */
3090 		"dot11RSNAConfigGroupRekeyStrict=%u\n"
3091 		"dot11RSNAConfigGroupUpdateCount=%u\n"
3092 		"dot11RSNAConfigPairwiseUpdateCount=%u\n"
3093 		"dot11RSNAConfigGroupCipherSize=%u\n"
3094 		"dot11RSNAConfigPMKLifetime=%u\n"
3095 		"dot11RSNAConfigPMKReauthThreshold=%u\n"
3096 		"dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3097 		"dot11RSNAConfigSATimeout=%u\n"
3098 		"dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3099 		"dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3100 		"dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3101 		"dot11RSNAPMKIDUsed=%s\n"
3102 		"dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3103 		"dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3104 		"dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3105 		"dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3106 		"dot11RSNA4WayHandshakeFailures=%u\n"
3107 		"dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3108 		RSN_VERSION,
3109 		!!wpa_auth->conf.wpa_strict_rekey,
3110 		dot11RSNAConfigGroupUpdateCount,
3111 		dot11RSNAConfigPairwiseUpdateCount,
3112 		wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
3113 		dot11RSNAConfigPMKLifetime,
3114 		dot11RSNAConfigPMKReauthThreshold,
3115 		dot11RSNAConfigSATimeout,
3116 		RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3117 		RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3118 		RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3119 		pmkid_txt,
3120 		RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3121 		RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3122 		RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3123 		wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3124 		wpa_auth->dot11RSNA4WayHandshakeFailures);
3125 	if (os_snprintf_error(buflen - len, ret))
3126 		return len;
3127 	len += ret;
3128 
3129 	/* TODO: dot11RSNAConfigPairwiseCiphersTable */
3130 	/* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3131 
3132 	/* Private MIB */
3133 	ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3134 			  wpa_auth->group->wpa_group_state);
3135 	if (os_snprintf_error(buflen - len, ret))
3136 		return len;
3137 	len += ret;
3138 
3139 	return len;
3140 }
3141 
3142 
3143 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3144 {
3145 	int len = 0, ret;
3146 	u32 pairwise = 0;
3147 
3148 	if (sm == NULL)
3149 		return 0;
3150 
3151 	/* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3152 
3153 	/* dot11RSNAStatsEntry */
3154 
3155 	pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3156 				       WPA_PROTO_RSN : WPA_PROTO_WPA,
3157 				       sm->pairwise);
3158 	if (pairwise == 0)
3159 		return 0;
3160 
3161 	ret = os_snprintf(
3162 		buf + len, buflen - len,
3163 		/* TODO: dot11RSNAStatsIndex */
3164 		"dot11RSNAStatsSTAAddress=" MACSTR "\n"
3165 		"dot11RSNAStatsVersion=1\n"
3166 		"dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3167 		/* TODO: dot11RSNAStatsTKIPICVErrors */
3168 		"dot11RSNAStatsTKIPLocalMICFailures=%u\n"
3169 		"dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
3170 		/* TODO: dot11RSNAStatsCCMPReplays */
3171 		/* TODO: dot11RSNAStatsCCMPDecryptErrors */
3172 		/* TODO: dot11RSNAStatsTKIPReplays */,
3173 		MAC2STR(sm->addr),
3174 		RSN_SUITE_ARG(pairwise),
3175 		sm->dot11RSNAStatsTKIPLocalMICFailures,
3176 		sm->dot11RSNAStatsTKIPRemoteMICFailures);
3177 	if (os_snprintf_error(buflen - len, ret))
3178 		return len;
3179 	len += ret;
3180 
3181 	/* Private MIB */
3182 	ret = os_snprintf(buf + len, buflen - len,
3183 			  "hostapdWPAPTKState=%d\n"
3184 			  "hostapdWPAPTKGroupState=%d\n",
3185 			  sm->wpa_ptk_state,
3186 			  sm->wpa_ptk_group_state);
3187 	if (os_snprintf_error(buflen - len, ret))
3188 		return len;
3189 	len += ret;
3190 
3191 	return len;
3192 }
3193 
3194 
3195 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3196 {
3197 	if (wpa_auth)
3198 		wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3199 }
3200 
3201 
3202 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3203 {
3204 	return sm && sm->pairwise_set;
3205 }
3206 
3207 
3208 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3209 {
3210 	return sm->pairwise;
3211 }
3212 
3213 
3214 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3215 {
3216 	if (sm == NULL)
3217 		return -1;
3218 	return sm->wpa_key_mgmt;
3219 }
3220 
3221 
3222 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3223 {
3224 	if (sm == NULL)
3225 		return 0;
3226 	return sm->wpa;
3227 }
3228 
3229 
3230 int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
3231 {
3232 	if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
3233 		return 0;
3234 	return sm->tk_already_set;
3235 }
3236 
3237 
3238 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3239 			     struct rsn_pmksa_cache_entry *entry)
3240 {
3241 	if (sm == NULL || sm->pmksa != entry)
3242 		return -1;
3243 	sm->pmksa = NULL;
3244 	return 0;
3245 }
3246 
3247 
3248 struct rsn_pmksa_cache_entry *
3249 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3250 {
3251 	return sm ? sm->pmksa : NULL;
3252 }
3253 
3254 
3255 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3256 {
3257 	if (sm)
3258 		sm->dot11RSNAStatsTKIPLocalMICFailures++;
3259 }
3260 
3261 
3262 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3263 {
3264 	if (wpa_auth == NULL)
3265 		return NULL;
3266 	*len = wpa_auth->wpa_ie_len;
3267 	return wpa_auth->wpa_ie;
3268 }
3269 
3270 
3271 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
3272 		       int session_timeout, struct eapol_state_machine *eapol)
3273 {
3274 	if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3275 	    sm->wpa_auth->conf.disable_pmksa_caching)
3276 		return -1;
3277 
3278 	if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
3279 				 sm->PTK.kck, sm->PTK.kck_len,
3280 				 sm->wpa_auth->addr, sm->addr, session_timeout,
3281 				 eapol, sm->wpa_key_mgmt))
3282 		return 0;
3283 
3284 	return -1;
3285 }
3286 
3287 
3288 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3289 			       const u8 *pmk, size_t len, const u8 *sta_addr,
3290 			       int session_timeout,
3291 			       struct eapol_state_machine *eapol)
3292 {
3293 	if (wpa_auth == NULL)
3294 		return -1;
3295 
3296 	if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len,
3297 				 NULL, 0,
3298 				 wpa_auth->addr,
3299 				 sta_addr, session_timeout, eapol,
3300 				 WPA_KEY_MGMT_IEEE8021X))
3301 		return 0;
3302 
3303 	return -1;
3304 }
3305 
3306 
3307 int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
3308 			   const u8 *pmk)
3309 {
3310 	if (wpa_auth->conf.disable_pmksa_caching)
3311 		return -1;
3312 
3313 	if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN,
3314 				 NULL, 0,
3315 				 wpa_auth->addr, addr, 0, NULL,
3316 				 WPA_KEY_MGMT_SAE))
3317 		return 0;
3318 
3319 	return -1;
3320 }
3321 
3322 
3323 void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3324 			   const u8 *sta_addr)
3325 {
3326 	struct rsn_pmksa_cache_entry *pmksa;
3327 
3328 	if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3329 		return;
3330 	pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3331 	if (pmksa) {
3332 		wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3333 			   MACSTR " based on request", MAC2STR(sta_addr));
3334 		pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3335 	}
3336 }
3337 
3338 
3339 /*
3340  * Remove and free the group from wpa_authenticator. This is triggered by a
3341  * callback to make sure nobody is currently iterating the group list while it
3342  * gets modified.
3343  */
3344 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
3345 			   struct wpa_group *group)
3346 {
3347 	struct wpa_group *prev = wpa_auth->group;
3348 
3349 	wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
3350 		   group->vlan_id);
3351 
3352 	while (prev) {
3353 		if (prev->next == group) {
3354 			/* This never frees the special first group as needed */
3355 			prev->next = group->next;
3356 			os_free(group);
3357 			break;
3358 		}
3359 		prev = prev->next;
3360 	}
3361 
3362 }
3363 
3364 
3365 /* Increase the reference counter for group */
3366 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
3367 			  struct wpa_group *group)
3368 {
3369 	/* Skip the special first group */
3370 	if (wpa_auth->group == group)
3371 		return;
3372 
3373 	group->references++;
3374 }
3375 
3376 
3377 /* Decrease the reference counter and maybe free the group */
3378 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
3379 			  struct wpa_group *group)
3380 {
3381 	/* Skip the special first group */
3382 	if (wpa_auth->group == group)
3383 		return;
3384 
3385 	group->references--;
3386 	if (group->references)
3387 		return;
3388 	wpa_group_free(wpa_auth, group);
3389 }
3390 
3391 
3392 /*
3393  * Add a group that has its references counter set to zero. Caller needs to
3394  * call wpa_group_get() on the return value to mark the entry in use.
3395  */
3396 static struct wpa_group *
3397 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3398 {
3399 	struct wpa_group *group;
3400 
3401 	if (wpa_auth == NULL || wpa_auth->group == NULL)
3402 		return NULL;
3403 
3404 	wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
3405 		   vlan_id);
3406 	group = wpa_group_init(wpa_auth, vlan_id, 0);
3407 	if (group == NULL)
3408 		return NULL;
3409 
3410 	group->next = wpa_auth->group->next;
3411 	wpa_auth->group->next = group;
3412 
3413 	return group;
3414 }
3415 
3416 
3417 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
3418 {
3419 	struct wpa_group *group;
3420 
3421 	if (sm == NULL || sm->wpa_auth == NULL)
3422 		return 0;
3423 
3424 	group = sm->wpa_auth->group;
3425 	while (group) {
3426 		if (group->vlan_id == vlan_id)
3427 			break;
3428 		group = group->next;
3429 	}
3430 
3431 	if (group == NULL) {
3432 		group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
3433 		if (group == NULL)
3434 			return -1;
3435 	}
3436 
3437 	if (sm->group == group)
3438 		return 0;
3439 
3440 	if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3441 		return -1;
3442 
3443 	wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
3444 		   "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
3445 
3446 	wpa_group_get(sm->wpa_auth, group);
3447 	wpa_group_put(sm->wpa_auth, sm->group);
3448 	sm->group = group;
3449 
3450 	return 0;
3451 }
3452 
3453 
3454 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
3455 				  struct wpa_state_machine *sm, int ack)
3456 {
3457 	if (wpa_auth == NULL || sm == NULL)
3458 		return;
3459 	wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
3460 		   " ack=%d", MAC2STR(sm->addr), ack);
3461 	if (sm->pending_1_of_4_timeout && ack) {
3462 		/*
3463 		 * Some deployed supplicant implementations update their SNonce
3464 		 * for each EAPOL-Key 2/4 message even within the same 4-way
3465 		 * handshake and then fail to use the first SNonce when
3466 		 * deriving the PTK. This results in unsuccessful 4-way
3467 		 * handshake whenever the relatively short initial timeout is
3468 		 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
3469 		 * around this by increasing the timeout now that we know that
3470 		 * the station has received the frame.
3471 		 */
3472 		int timeout_ms = eapol_key_timeout_subseq;
3473 		wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
3474 			   "timeout by %u ms because of acknowledged frame",
3475 			   timeout_ms);
3476 		eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
3477 		eloop_register_timeout(timeout_ms / 1000,
3478 				       (timeout_ms % 1000) * 1000,
3479 				       wpa_send_eapol_timeout, wpa_auth, sm);
3480 	}
3481 }
3482 
3483 
3484 int wpa_auth_uses_sae(struct wpa_state_machine *sm)
3485 {
3486 	if (sm == NULL)
3487 		return 0;
3488 	return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
3489 }
3490 
3491 
3492 int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
3493 {
3494 	if (sm == NULL)
3495 		return 0;
3496 	return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
3497 }
3498 
3499 
3500 #ifdef CONFIG_P2P
3501 int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
3502 {
3503 	if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
3504 		return -1;
3505 	os_memcpy(addr, sm->ip_addr, 4);
3506 	return 0;
3507 }
3508 #endif /* CONFIG_P2P */
3509 
3510 
3511 int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
3512 					 struct radius_das_attrs *attr)
3513 {
3514 	return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
3515 }
3516 
3517 
3518 void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
3519 {
3520 	struct wpa_group *group;
3521 
3522 	if (!wpa_auth)
3523 		return;
3524 	for (group = wpa_auth->group; group; group = group->next)
3525 		wpa_group_config_group_keys(wpa_auth, group);
3526 }
3527