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Always clear EAP altAccept and altReject variables on new association
[thirdparty/hostap.git] / hostapd / wpa.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator
3 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "includes.h"
16
17#ifndef CONFIG_NATIVE_WINDOWS
18
19#include "common.h"
20#include "config.h"
21#include "eapol_sm.h"
22#include "wpa.h"
23#include "sha1.h"
56586197 24#include "sha256.h"
6fc6879b
JM		 25#include "rc4.h"
26#include "aes_wrap.h"
27#include "crypto.h"
28#include "eloop.h"
29#include "ieee802_11.h"
30#include "pmksa_cache.h"
31#include "state_machine.h"
32#include "wpa_auth_i.h"
33#include "wpa_auth_ie.h"
34
35#define STATE_MACHINE_DATA struct wpa_state_machine
36#define STATE_MACHINE_DEBUG_PREFIX "WPA"
37#define STATE_MACHINE_ADDR sm->addr
38
39
40static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
41static void wpa_sm_step(struct wpa_state_machine *sm);
42static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
43static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
44static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
45 struct wpa_group *group);
581a8cde 46static void wpa_request_new_ptk(struct wpa_state_machine *sm);
6fc6879b
JM		 47
48/* Default timeouts are 100 ms, but this seems to be a bit too fast for most
49 * WPA Supplicants, so use a bit longer timeout. */
50static const u32 dot11RSNAConfigGroupUpdateTimeOut = 1000; /* ms */
51static const u32 dot11RSNAConfigGroupUpdateCount = 3;
52static const u32 dot11RSNAConfigPairwiseUpdateTimeOut = 1000; /* ms */
53static const u32 dot11RSNAConfigPairwiseUpdateCount = 3;
54
55/* TODO: make these configurable */
56static const int dot11RSNAConfigPMKLifetime = 43200;
57static const int dot11RSNAConfigPMKReauthThreshold = 70;
58static const int dot11RSNAConfigSATimeout = 60;
59
60
61static inline void wpa_auth_mic_failure_report(
62 struct wpa_authenticator *wpa_auth, const u8 *addr)
63{
64 if (wpa_auth->cb.mic_failure_report)
65 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
66}
67
68
69static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
70 const u8 *addr, wpa_eapol_variable var,
71 int value)
72{
73 if (wpa_auth->cb.set_eapol)
74 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
75}
76
77
78static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
79 const u8 *addr, wpa_eapol_variable var)
80{
81 if (wpa_auth->cb.get_eapol == NULL)
82 return -1;
83 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
84}
85
86
87static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
88 const u8 *addr, const u8 *prev_psk)
89{
90 if (wpa_auth->cb.get_psk == NULL)
91 return NULL;
92 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
93}
94
95
96static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
97 const u8 *addr, u8 *msk, size_t *len)
98{
99 if (wpa_auth->cb.get_msk == NULL)
100 return -1;
101 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
102}
103
104
105static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
106 int vlan_id,
107 const char *alg, const u8 *addr, int idx,
108 u8 *key, size_t key_len)
109{
110 if (wpa_auth->cb.set_key == NULL)
111 return -1;
112 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
113 key, key_len);
114}
115
116
117static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
118 const u8 *addr, int idx, u8 *seq)
119{
120 if (wpa_auth->cb.get_seqnum == NULL)
121 return -1;
122 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
123}
124
125
126static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
127 const u8 *addr, int idx, u8 *seq)
128{
129 if (wpa_auth->cb.get_seqnum_igtk == NULL)
130 return -1;
131 return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
132}
133
134
135static inline int
136wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
137 const u8 *data, size_t data_len, int encrypt)
138{
139 if (wpa_auth->cb.send_eapol == NULL)
140 return -1;
141 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
142 encrypt);
143}
144
145
146int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
147 int (*cb)(struct wpa_state_machine *sm, void *ctx),
148 void *cb_ctx)
149{
150 if (wpa_auth->cb.for_each_sta == NULL)
151 return 0;
152 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
153}
154
155
bf98f7f3
JM		 156int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
157 int (*cb)(struct wpa_authenticator *a, void *ctx),
158 void *cb_ctx)
159{
160 if (wpa_auth->cb.for_each_auth == NULL)
161 return 0;
162 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
163}
164
165
6fc6879b
JM		 166void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
167 logger_level level, const char *txt)
168{
169 if (wpa_auth->cb.logger == NULL)
170 return;
171 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
172}
173
174
175void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
176 logger_level level, const char *fmt, ...)
177{
178 char *format;
179 int maxlen;
180 va_list ap;
181
182 if (wpa_auth->cb.logger == NULL)
183 return;
184
185 maxlen = os_strlen(fmt) + 100;
186 format = os_malloc(maxlen);
187 if (!format)
188 return;
189
190 va_start(ap, fmt);
191 vsnprintf(format, maxlen, fmt, ap);
192 va_end(ap);
193
194 wpa_auth_logger(wpa_auth, addr, level, format);
195
196 os_free(format);
197}
198
199
200static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
201 const u8 *addr)
202{
203 if (wpa_auth->cb.disconnect == NULL)
204 return;
205 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
206 WLAN_REASON_PREV_AUTH_NOT_VALID);
207}
208
209
210static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
211{
56586197 212 int ret = 0;
6fc6879b 213#ifdef CONFIG_IEEE80211R
56586197
JM		 214 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
215 ret = 1;
6fc6879b 216#endif /* CONFIG_IEEE80211R */
56586197
JM		 217#ifdef CONFIG_IEEE80211W
218 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
219 ret = 1;
220#endif /* CONFIG_IEEE80211W */
221 return ret;
6fc6879b
JM		 222}
223
224
225static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
226{
227 struct wpa_authenticator *wpa_auth = eloop_ctx;
228
229 if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
230 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
231 "initialization.");
232 } else {
233 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
234 }
235
236 if (wpa_auth->conf.wpa_gmk_rekey) {
237 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
238 wpa_rekey_gmk, wpa_auth, NULL);
239 }
240}
241
242
243static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
244{
245 struct wpa_authenticator *wpa_auth = eloop_ctx;
246 struct wpa_group *group;
247
248 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
249 for (group = wpa_auth->group; group; group = group->next) {
250 group->GTKReKey = TRUE;
251 do {
252 group->changed = FALSE;
253 wpa_group_sm_step(wpa_auth, group);
254 } while (group->changed);
255 }
256
257 if (wpa_auth->conf.wpa_group_rekey) {
258 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
259 0, wpa_rekey_gtk, wpa_auth, NULL);
260 }
261}
262
263
581a8cde
JM		 264static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
265{
266 struct wpa_authenticator *wpa_auth = eloop_ctx;
267 struct wpa_state_machine *sm = timeout_ctx;
268
269 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
270 wpa_request_new_ptk(sm);
271 wpa_sm_step(sm);
272}
273
274
6fc6879b
JM		 275static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
276{
277 if (sm->pmksa == ctx)
278 sm->pmksa = NULL;
279 return 0;
280}
281
282
283static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
284 void *ctx)
285{
286 struct wpa_authenticator *wpa_auth = ctx;
287 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
288}
289
290
291static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
292 int vlan_id)
293{
294 struct wpa_group *group;
295 u8 buf[ETH_ALEN + 8 + sizeof(group)];
296 u8 rkey[32];
297
298 group = os_zalloc(sizeof(struct wpa_group));
299 if (group == NULL)
300 return NULL;
301
302 group->GTKAuthenticator = TRUE;
303 group->vlan_id = vlan_id;
304
305 switch (wpa_auth->conf.wpa_group) {
306 case WPA_CIPHER_CCMP:
307 group->GTK_len = 16;
308 break;
309 case WPA_CIPHER_TKIP:
310 group->GTK_len = 32;
311 break;
312 case WPA_CIPHER_WEP104:
313 group->GTK_len = 13;
314 break;
315 case WPA_CIPHER_WEP40:
316 group->GTK_len = 5;
317 break;
318 }
319
320 /* Counter = PRF-256(Random number, "Init Counter",
321 * Local MAC Address || Time)
322 */
323 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
324 wpa_get_ntp_timestamp(buf + ETH_ALEN);
325 os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
326 if (os_get_random(rkey, sizeof(rkey)) ||
327 os_get_random(group->GMK, WPA_GMK_LEN)) {
328 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
329 "initialization.");
330 os_free(group);
331 return NULL;
332 }
333
334 sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
335 group->Counter, WPA_NONCE_LEN);
336
337 group->GInit = TRUE;
338 wpa_group_sm_step(wpa_auth, group);
339 group->GInit = FALSE;
340 wpa_group_sm_step(wpa_auth, group);
341
342 return group;
343}
344
345
346/**
347 * wpa_init - Initialize WPA authenticator
348 * @addr: Authenticator address
349 * @conf: Configuration for WPA authenticator
350 * Returns: Pointer to WPA authenticator data or %NULL on failure
351 */
352struct wpa_authenticator * wpa_init(const u8 *addr,
353 struct wpa_auth_config *conf,
354 struct wpa_auth_callbacks *cb)
355{
356 struct wpa_authenticator *wpa_auth;
357
358 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
359 if (wpa_auth == NULL)
360 return NULL;
361 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
362 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
363 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
364
365 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
366 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
367 os_free(wpa_auth);
368 return NULL;
369 }
370
371 wpa_auth->group = wpa_group_init(wpa_auth, 0);
372 if (wpa_auth->group == NULL) {
373 os_free(wpa_auth->wpa_ie);
374 os_free(wpa_auth);
375 return NULL;
376 }
377
378 wpa_auth->pmksa = pmksa_cache_init(wpa_auth_pmksa_free_cb, wpa_auth);
379 if (wpa_auth->pmksa == NULL) {
380 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
381 os_free(wpa_auth->wpa_ie);
382 os_free(wpa_auth);
383 return NULL;
384 }
385
386#ifdef CONFIG_IEEE80211R
387 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
388 if (wpa_auth->ft_pmk_cache == NULL) {
389 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
390 os_free(wpa_auth->wpa_ie);
391 pmksa_cache_deinit(wpa_auth->pmksa);
392 os_free(wpa_auth);
393 return NULL;
394 }
395#endif /* CONFIG_IEEE80211R */
396
397 if (wpa_auth->conf.wpa_gmk_rekey) {
398 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
399 wpa_rekey_gmk, wpa_auth, NULL);
400 }
401
402 if (wpa_auth->conf.wpa_group_rekey) {
403 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
404 wpa_rekey_gtk, wpa_auth, NULL);
405 }
406
407 return wpa_auth;
408}
409
410
411/**
412 * wpa_deinit - Deinitialize WPA authenticator
413 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
414 */
415void wpa_deinit(struct wpa_authenticator *wpa_auth)
416{
417 struct wpa_group *group, *prev;
418
419 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
420 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
421
422#ifdef CONFIG_PEERKEY
423 while (wpa_auth->stsl_negotiations)
424 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
425#endif /* CONFIG_PEERKEY */
426
427 pmksa_cache_deinit(wpa_auth->pmksa);
428
429#ifdef CONFIG_IEEE80211R
430 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
431 wpa_auth->ft_pmk_cache = NULL;
432#endif /* CONFIG_IEEE80211R */
433
434 os_free(wpa_auth->wpa_ie);
435
436 group = wpa_auth->group;
437 while (group) {
438 prev = group;
439 group = group->next;
440 os_free(prev);
441 }
442
443 os_free(wpa_auth);
444}
445
446
447/**
448 * wpa_reconfig - Update WPA authenticator configuration
449 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
450 * @conf: Configuration for WPA authenticator
451 */
452int wpa_reconfig(struct wpa_authenticator *wpa_auth,
453 struct wpa_auth_config *conf)
454{
455 if (wpa_auth == NULL)
456 return 0;
457
458 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 459 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
460 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
461 return -1;
462 }
463
6fc6879b
JM		 464 return 0;
465}
466
467
468struct wpa_state_machine *
469wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
470{
471 struct wpa_state_machine *sm;
472
473 sm = os_zalloc(sizeof(struct wpa_state_machine));
474 if (sm == NULL)
475 return NULL;
476 os_memcpy(sm->addr, addr, ETH_ALEN);
477
478 sm->wpa_auth = wpa_auth;
479 sm->group = wpa_auth->group;
480
481 return sm;
482}
483
484
485void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
486 struct wpa_state_machine *sm)
487{
488 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
489 return;
490
491#ifdef CONFIG_IEEE80211R
492 if (sm->ft_completed) {
493 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
494 "FT authentication already completed - do not "
495 "start 4-way handshake");
496 return;
497 }
498#endif /* CONFIG_IEEE80211R */
499
500 if (sm->started) {
501 os_memset(sm->key_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
502 sm->ReAuthenticationRequest = TRUE;
503 wpa_sm_step(sm);
504 return;
505 }
506
507 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
508 "start authentication");
509 sm->started = 1;
510
511 sm->Init = TRUE;
512 wpa_sm_step(sm);
513 sm->Init = FALSE;
514 sm->AuthenticationRequest = TRUE;
515 wpa_sm_step(sm);
516}
517
518
519static void wpa_free_sta_sm(struct wpa_state_machine *sm)
520{
521 os_free(sm->last_rx_eapol_key);
522 os_free(sm->wpa_ie);
523 os_free(sm);
524}
525
526
527void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
528{
529 if (sm == NULL)
530 return;
531
532 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
533 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
534 "strict rekeying - force GTK rekey since STA "
535 "is leaving");
536 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
537 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
538 NULL);
539 }
540
541 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
542 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 543 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 544 if (sm->in_step_loop) {
545 /* Must not free state machine while wpa_sm_step() is running.
546 * Freeing will be completed in the end of wpa_sm_step(). */
547 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
548 "machine deinit for " MACSTR, MAC2STR(sm->addr));
549 sm->pending_deinit = 1;
550 } else
551 wpa_free_sta_sm(sm);
552}
553
554
555static void wpa_request_new_ptk(struct wpa_state_machine *sm)
556{
557 if (sm == NULL)
558 return;
559
560 sm->PTKRequest = TRUE;
561 sm->PTK_valid = 0;
562}
563
564
565void wpa_receive(struct wpa_authenticator *wpa_auth,
566 struct wpa_state_machine *sm,
567 u8 *data, size_t data_len)
568{
569 struct ieee802_1x_hdr *hdr;
570 struct wpa_eapol_key *key;
571 u16 key_info, key_data_length;
572 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
573 SMK_M1, SMK_M3, SMK_ERROR } msg;
574 char *msgtxt;
575 struct wpa_eapol_ie_parse kde;
576
577 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
578 return;
579
580 if (data_len < sizeof(*hdr) + sizeof(*key))
581 return;
582
583 hdr = (struct ieee802_1x_hdr *) data;
584 key = (struct wpa_eapol_key *) (hdr + 1);
585 key_info = WPA_GET_BE16(key->key_info);
586 key_data_length = WPA_GET_BE16(key->key_data_length);
587 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
588 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
589 "key_data overflow (%d > %lu)",
590 key_data_length,
591 (unsigned long) (data_len - sizeof(*hdr) -
592 sizeof(*key)));
593 return;
594 }
595
596 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
597 * are set */
598
599 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
600 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
601 if (key_info & WPA_KEY_INFO_ERROR) {
602 msg = SMK_ERROR;
603 msgtxt = "SMK Error";
604 } else {
605 msg = SMK_M1;
606 msgtxt = "SMK M1";
607 }
608 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
609 msg = SMK_M3;
610 msgtxt = "SMK M3";
611 } else if (key_info & WPA_KEY_INFO_REQUEST) {
612 msg = REQUEST;
613 msgtxt = "Request";
614 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
615 msg = GROUP_2;
616 msgtxt = "2/2 Group";
617 } else if (key_data_length == 0) {
618 msg = PAIRWISE_4;
619 msgtxt = "4/4 Pairwise";
620 } else {
621 msg = PAIRWISE_2;
622 msgtxt = "2/4 Pairwise";
623 }
624
625 /* TODO: key_info type validation for PeerKey */
626 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
627 msg == GROUP_2) {
628 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
629 if (sm->pairwise == WPA_CIPHER_CCMP) {
630 if (wpa_use_aes_cmac(sm) &&
631 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
632 wpa_auth_logger(wpa_auth, sm->addr,
633 LOGGER_WARNING,
634 "advertised support for "
635 "AES-128-CMAC, but did not "
636 "use it");
637 return;
638 }
639
640 if (!wpa_use_aes_cmac(sm) &&
641 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
642 wpa_auth_logger(wpa_auth, sm->addr,
643 LOGGER_WARNING,
644 "did not use HMAC-SHA1-AES "
645 "with CCMP");
646 return;
647 }
648 }
649 }
650
651 if (key_info & WPA_KEY_INFO_REQUEST) {
652 if (sm->req_replay_counter_used &&
653 os_memcmp(key->replay_counter, sm->req_replay_counter,
654 WPA_REPLAY_COUNTER_LEN) <= 0) {
655 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
656 "received EAPOL-Key request with "
657 "replayed counter");
658 return;
659 }
660 }
661
662 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
663 (!sm->key_replay_counter_valid ||
664 os_memcmp(key->replay_counter, sm->key_replay_counter,
665 WPA_REPLAY_COUNTER_LEN) != 0)) {
666 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
667 "received EAPOL-Key %s with unexpected "
668 "replay counter", msgtxt);
669 wpa_hexdump(MSG_DEBUG, "expected replay counter",
670 sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
671 wpa_hexdump(MSG_DEBUG, "received replay counter",
672 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
673 return;
674 }
675
676 switch (msg) {
677 case PAIRWISE_2:
678 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
679 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
680 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
681 "received EAPOL-Key msg 2/4 in "
682 "invalid state (%d) - dropped",
683 sm->wpa_ptk_state);
684 return;
685 }
686 if (sm->wpa_ie == NULL ||
687 sm->wpa_ie_len != key_data_length ||
688 os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
689 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
690 "WPA IE from (Re)AssocReq did not "
691 "match with msg 2/4");
692 if (sm->wpa_ie) {
693 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
694 sm->wpa_ie, sm->wpa_ie_len);
695 }
696 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
697 (u8 *) (key + 1), key_data_length);
698 /* MLME-DEAUTHENTICATE.request */
699 wpa_sta_disconnect(wpa_auth, sm->addr);
700 return;
701 }
702 break;
703 case PAIRWISE_4:
704 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
705 !sm->PTK_valid) {
706 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
707 "received EAPOL-Key msg 4/4 in "
708 "invalid state (%d) - dropped",
709 sm->wpa_ptk_state);
710 return;
711 }
712 break;
713 case GROUP_2:
714 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
715 || !sm->PTK_valid) {
716 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
717 "received EAPOL-Key msg 2/2 in "
718 "invalid state (%d) - dropped",
719 sm->wpa_ptk_group_state);
720 return;
721 }
722 break;
723#ifdef CONFIG_PEERKEY
724 case SMK_M1:
725 case SMK_M3:
726 case SMK_ERROR:
727 if (!wpa_auth->conf.peerkey) {
728 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
729 "PeerKey use disabled - ignoring message");
730 return;
731 }
732 if (!sm->PTK_valid) {
733 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
734 "received EAPOL-Key msg SMK in "
735 "invalid state - dropped");
736 return;
737 }
738 break;
739#else /* CONFIG_PEERKEY */
740 case SMK_M1:
741 case SMK_M3:
742 case SMK_ERROR:
743 return; /* STSL disabled - ignore SMK messages */
744#endif /* CONFIG_PEERKEY */
745 case REQUEST:
746 break;
747 }
748
749 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
750 "received EAPOL-Key frame (%s)", msgtxt);
751
752 if (key_info & WPA_KEY_INFO_ACK) {
753 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
754 "received invalid EAPOL-Key: Key Ack set");
755 return;
756 }
757
758 if (!(key_info & WPA_KEY_INFO_MIC)) {
759 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
760 "received invalid EAPOL-Key: Key MIC not set");
761 return;
762 }
763
764 sm->MICVerified = FALSE;
765 if (sm->PTK_valid) {
766 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
767 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
768 "received EAPOL-Key with invalid MIC");
769 return;
770 }
771 sm->MICVerified = TRUE;
772 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
773 }
774
775 if (key_info & WPA_KEY_INFO_REQUEST) {
776 if (sm->MICVerified) {
777 sm->req_replay_counter_used = 1;
778 os_memcpy(sm->req_replay_counter, key->replay_counter,
779 WPA_REPLAY_COUNTER_LEN);
780 } else {
781 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
782 "received EAPOL-Key request with "
783 "invalid MIC");
784 return;
785 }
786
787 /*
788 * TODO: should decrypt key data field if encryption was used;
789 * even though MAC address KDE is not normally encrypted,
790 * supplicant is allowed to encrypt it.
791 */
792 if (msg == SMK_ERROR) {
793#ifdef CONFIG_PEERKEY
794 wpa_smk_error(wpa_auth, sm, key);
795#endif /* CONFIG_PEERKEY */
796 return;
797 } else if (key_info & WPA_KEY_INFO_ERROR) {
798 /* Supplicant reported a Michael MIC error */
799 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
800 "received EAPOL-Key Error Request "
801 "(STA detected Michael MIC failure)");
802 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
803 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
804 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
805 /* Error report is not a request for a new key
806 * handshake, but since Authenticator may do it, let's
807 * change the keys now anyway. */
808 wpa_request_new_ptk(sm);
809 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
810 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
811 "received EAPOL-Key Request for new "
812 "4-Way Handshake");
813 wpa_request_new_ptk(sm);
814#ifdef CONFIG_PEERKEY
815 } else if (msg == SMK_M1) {
816 wpa_smk_m1(wpa_auth, sm, key);
817#endif /* CONFIG_PEERKEY */
818 } else if (key_data_length > 0 &&
819 wpa_parse_kde_ies((const u8 *) (key + 1),
820 key_data_length, &kde) == 0 &&
821 kde.mac_addr) {
822 } else {
823 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
824 "received EAPOL-Key Request for GTK "
825 "rekeying");
826 /* FIX: why was this triggering PTK rekeying for the
827 * STA that requested Group Key rekeying?? */
828 /* wpa_request_new_ptk(sta->wpa_sm); */
829 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
830 wpa_rekey_gtk(wpa_auth, NULL);
831 }
832 } else {
833 /* Do not allow the same key replay counter to be reused. */
834 sm->key_replay_counter_valid = FALSE;
835 }
836
837#ifdef CONFIG_PEERKEY
838 if (msg == SMK_M3) {
839 wpa_smk_m3(wpa_auth, sm, key);
840 return;
841 }
842#endif /* CONFIG_PEERKEY */
843
844 os_free(sm->last_rx_eapol_key);
845 sm->last_rx_eapol_key = os_malloc(data_len);
846 if (sm->last_rx_eapol_key == NULL)
847 return;
848 os_memcpy(sm->last_rx_eapol_key, data, data_len);
849 sm->last_rx_eapol_key_len = data_len;
850
851 sm->EAPOLKeyReceived = TRUE;
852 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
853 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
854 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
855 wpa_sm_step(sm);
856}
857
858
859static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
860 u8 *gtk, size_t gtk_len)
861{
862 u8 data[ETH_ALEN + WPA_NONCE_LEN];
863
864 /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
865 os_memcpy(data, addr, ETH_ALEN);
866 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
867
56586197
JM		 868#ifdef CONFIG_IEEE80211W
869 sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
870 data, sizeof(data), gtk, gtk_len);
871#else /* CONFIG_IEEE80211W */
6fc6879b
JM		 872 sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
873 data, sizeof(data), gtk, gtk_len);
56586197 874#endif /* CONFIG_IEEE80211W */
6fc6879b
JM		 875
876 wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
877 wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
878}
879
880
881static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
882{
883 struct wpa_authenticator *wpa_auth = eloop_ctx;
884 struct wpa_state_machine *sm = timeout_ctx;
885
886 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
887 sm->TimeoutEvt = TRUE;
888 wpa_sm_step(sm);
889}
890
891
892void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
893 struct wpa_state_machine *sm, int key_info,
894 const u8 *key_rsc, const u8 *nonce,
895 const u8 *kde, size_t kde_len,
896 int keyidx, int encr, int force_version)
897{
898 struct ieee802_1x_hdr *hdr;
899 struct wpa_eapol_key *key;
900 size_t len;
901 int alg;
902 int key_data_len, pad_len = 0;
903 u8 *buf, *pos;
904 int version, pairwise;
905
906 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
907
908 if (force_version)
909 version = force_version;
910 else if (wpa_use_aes_cmac(sm))
911 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
912 else if (sm->pairwise == WPA_CIPHER_CCMP)
913 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
914 else
915 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
916
917 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
918
919 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
920 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
921 "encr=%d)",
922 version,
923 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
924 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
925 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
926 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
927 pairwise, (unsigned long) kde_len, keyidx, encr);
928
929 key_data_len = kde_len;
930
931 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
932 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
933 pad_len = key_data_len % 8;
934 if (pad_len)
935 pad_len = 8 - pad_len;
936 key_data_len += pad_len + 8;
937 }
938
939 len += key_data_len;
940
941 hdr = os_zalloc(len);
942 if (hdr == NULL)
943 return;
944 hdr->version = wpa_auth->conf.eapol_version;
945 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
946 hdr->length = host_to_be16(len - sizeof(*hdr));
947 key = (struct wpa_eapol_key *) (hdr + 1);
948
949 key->type = sm->wpa == WPA_VERSION_WPA2 ?
950 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
951 key_info |= version;
952 if (encr && sm->wpa == WPA_VERSION_WPA2)
953 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
954 if (sm->wpa != WPA_VERSION_WPA2)
955 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
956 WPA_PUT_BE16(key->key_info, key_info);
957
958 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
959 switch (alg) {
960 case WPA_CIPHER_CCMP:
961 WPA_PUT_BE16(key->key_length, 16);
962 break;
963 case WPA_CIPHER_TKIP:
964 WPA_PUT_BE16(key->key_length, 32);
965 break;
966 case WPA_CIPHER_WEP40:
967 WPA_PUT_BE16(key->key_length, 5);
968 break;
969 case WPA_CIPHER_WEP104:
970 WPA_PUT_BE16(key->key_length, 13);
971 break;
972 }
973 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
974 WPA_PUT_BE16(key->key_length, 0);
975
976 /* FIX: STSL: what to use as key_replay_counter? */
977 inc_byte_array(sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
978 os_memcpy(key->replay_counter, sm->key_replay_counter,
979 WPA_REPLAY_COUNTER_LEN);
980 sm->key_replay_counter_valid = TRUE;
981
982 if (nonce)
983 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
984
985 if (key_rsc)
986 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
987
988 if (kde && !encr) {
989 os_memcpy(key + 1, kde, kde_len);
990 WPA_PUT_BE16(key->key_data_length, kde_len);
991 } else if (encr && kde) {
992 buf = os_zalloc(key_data_len);
993 if (buf == NULL) {
994 os_free(hdr);
995 return;
996 }
997 pos = buf;
998 os_memcpy(pos, kde, kde_len);
999 pos += kde_len;
1000
1001 if (pad_len)
1002 *pos++ = 0xdd;
1003
1004 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1005 buf, key_data_len);
1006 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1007 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1008 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1009 (u8 *) (key + 1))) {
1010 os_free(hdr);
1011 os_free(buf);
1012 return;
1013 }
1014 WPA_PUT_BE16(key->key_data_length, key_data_len);
1015 } else {
1016 u8 ek[32];
1017 os_memcpy(key->key_iv,
1018 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1019 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1020 os_memcpy(ek, key->key_iv, 16);
1021 os_memcpy(ek + 16, sm->PTK.kek, 16);
1022 os_memcpy(key + 1, buf, key_data_len);
1023 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1024 WPA_PUT_BE16(key->key_data_length, key_data_len);
1025 }
1026 os_free(buf);
1027 }
1028
1029 if (key_info & WPA_KEY_INFO_MIC) {
1030 if (!sm->PTK_valid) {
1031 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1032 "PTK not valid when sending EAPOL-Key "
1033 "frame");
1034 os_free(hdr);
1035 return;
1036 }
1037 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1038 key->key_mic);
1039 }
1040
1041 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1042 1);
1043 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1044 sm->pairwise_set);
1045 os_free(hdr);
1046}
1047
1048
1049static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1050 struct wpa_state_machine *sm, int key_info,
1051 const u8 *key_rsc, const u8 *nonce,
1052 const u8 *kde, size_t kde_len,
1053 int keyidx, int encr)
1054{
1055 int timeout_ms;
1056 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1057
1058 if (sm == NULL)
1059 return;
1060
1061 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1062 keyidx, encr, 0);
1063
1064 timeout_ms = pairwise ? dot11RSNAConfigPairwiseUpdateTimeOut :
1065 dot11RSNAConfigGroupUpdateTimeOut;
1066 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1067 wpa_send_eapol_timeout, wpa_auth, sm);
1068}
1069
1070
1071static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1072{
1073 struct ieee802_1x_hdr *hdr;
1074 struct wpa_eapol_key *key;
1075 u16 key_info;
1076 int ret = 0;
1077 u8 mic[16];
1078
1079 if (data_len < sizeof(*hdr) + sizeof(*key))
1080 return -1;
1081
1082 hdr = (struct ieee802_1x_hdr *) data;
1083 key = (struct wpa_eapol_key *) (hdr + 1);
1084 key_info = WPA_GET_BE16(key->key_info);
1085 os_memcpy(mic, key->key_mic, 16);
1086 os_memset(key->key_mic, 0, 16);
1087 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1088 data, data_len, key->key_mic) ||
1089 os_memcmp(mic, key->key_mic, 16) != 0)
1090 ret = -1;
1091 os_memcpy(key->key_mic, mic, 16);
1092 return ret;
1093}
1094
1095
1096void wpa_remove_ptk(struct wpa_state_machine *sm)
1097{
1098 sm->PTK_valid = FALSE;
1099 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1100 wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1101 sm->pairwise_set = FALSE;
581a8cde 1102 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1103}
1104
1105
1106void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1107{
5d22a1d5
JM		 1108 int remove_ptk = 1;
1109
6fc6879b
JM		 1110 if (sm == NULL)
1111 return;
1112
1113 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1114 "event %d notification", event);
1115
1116 switch (event) {
1117 case WPA_AUTH:
1118 case WPA_ASSOC:
1119 break;
1120 case WPA_DEAUTH:
1121 case WPA_DISASSOC:
1122 sm->DeauthenticationRequest = TRUE;
1123 break;
1124 case WPA_REAUTH:
1125 case WPA_REAUTH_EAPOL:
9663596f
JM		 1126 if (sm->GUpdateStationKeys) {
1127 /*
1128 * Reauthentication cancels the pending group key
1129 * update for this STA.
1130 */
1131 sm->group->GKeyDoneStations--;
1132 sm->GUpdateStationKeys = FALSE;
1133 sm->PtkGroupInit = TRUE;
1134 }
6fc6879b
JM		 1135 sm->ReAuthenticationRequest = TRUE;
1136 break;
1137 case WPA_ASSOC_FT:
1138#ifdef CONFIG_IEEE80211R
1139 /* Using FT protocol, not WPA auth state machine */
1140 sm->ft_completed = 1;
1141 return;
1142#else /* CONFIG_IEEE80211R */
1143 break;
1144#endif /* CONFIG_IEEE80211R */
1145 }
1146
1147#ifdef CONFIG_IEEE80211R
1148 sm->ft_completed = 0;
1149#endif /* CONFIG_IEEE80211R */
1150
5d22a1d5
JM		 1151#ifdef CONFIG_IEEE80211W
1152 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1153 remove_ptk = 0;
1154#endif /* CONFIG_IEEE80211W */
6fc6879b 1155
5d22a1d5
JM		 1156 if (remove_ptk) {
1157 sm->PTK_valid = FALSE;
1158 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1159
1160 if (event != WPA_REAUTH_EAPOL)
1161 wpa_remove_ptk(sm);
1162 }
6fc6879b
JM		 1163
1164 wpa_sm_step(sm);
1165}
1166
1167
1168static const char * wpa_alg_txt(int alg)
1169{
1170 switch (alg) {
1171 case WPA_CIPHER_CCMP:
1172 return "CCMP";
1173 case WPA_CIPHER_TKIP:
1174 return "TKIP";
1175 case WPA_CIPHER_WEP104:
1176 case WPA_CIPHER_WEP40:
1177 return "WEP";
1178 default:
1179 return "";
1180 }
1181}
1182
1183
1184SM_STATE(WPA_PTK, INITIALIZE)
1185{
1186 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1187 if (sm->Init) {
1188 /* Init flag is not cleared here, so avoid busy
1189 * loop by claiming nothing changed. */
1190 sm->changed = FALSE;
1191 }
1192
1193 sm->keycount = 0;
1194 if (sm->GUpdateStationKeys)
1195 sm->group->GKeyDoneStations--;
1196 sm->GUpdateStationKeys = FALSE;
1197 if (sm->wpa == WPA_VERSION_WPA)
1198 sm->PInitAKeys = FALSE;
1199 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1200 * Local AA > Remote AA)) */) {
1201 sm->Pair = TRUE;
1202 }
1203 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1204 wpa_remove_ptk(sm);
1205 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1206 sm->TimeoutCtr = 0;
56586197 1207 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1208 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1209 WPA_EAPOL_authorized, 0);
1210 }
1211}
1212
1213
1214SM_STATE(WPA_PTK, DISCONNECT)
1215{
1216 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1217 sm->Disconnect = FALSE;
1218 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1219}
1220
1221
1222SM_STATE(WPA_PTK, DISCONNECTED)
1223{
1224 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1225 sm->DeauthenticationRequest = FALSE;
1226}
1227
1228
1229SM_STATE(WPA_PTK, AUTHENTICATION)
1230{
1231 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1232 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1233 sm->PTK_valid = FALSE;
1234 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1235 1);
1236 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1237 sm->AuthenticationRequest = FALSE;
1238}
1239
1240
1241SM_STATE(WPA_PTK, AUTHENTICATION2)
1242{
1243 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1244 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1245 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1246 sm->ReAuthenticationRequest = FALSE;
1247 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1248 * logical place than INITIALIZE since AUTHENTICATION2 can be
1249 * re-entered on ReAuthenticationRequest without going through
1250 * INITIALIZE. */
1251 sm->TimeoutCtr = 0;
1252}
1253
1254
1255SM_STATE(WPA_PTK, INITPMK)
1256{
1257 u8 msk[2 * PMK_LEN];
1258 size_t len = 2 * PMK_LEN;
1259
1260 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1261#ifdef CONFIG_IEEE80211R
1262 sm->xxkey_len = 0;
1263#endif /* CONFIG_IEEE80211R */
1264 if (sm->pmksa) {
1265 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1266 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1267 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1268 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1269 "(len=%lu)", (unsigned long) len);
1270 os_memcpy(sm->PMK, msk, PMK_LEN);
1271#ifdef CONFIG_IEEE80211R
1272 if (len >= 2 * PMK_LEN) {
1273 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1274 sm->xxkey_len = PMK_LEN;
1275 }
1276#endif /* CONFIG_IEEE80211R */
1277 } else {
1278 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1279 }
1280
1281 sm->req_replay_counter_used = 0;
1282 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1283 * will break reauthentication since EAPOL state machines may not be
1284 * get into AUTHENTICATING state that clears keyRun before WPA state
1285 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1286 * state and takes PMK from the previously used AAA Key. This will
1287 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1288 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1289 * be good workaround for this issue. */
1290 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1291}
1292
1293
1294SM_STATE(WPA_PTK, INITPSK)
1295{
1296 const u8 *psk;
1297 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1298 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1299 if (psk) {
1300 os_memcpy(sm->PMK, psk, PMK_LEN);
1301#ifdef CONFIG_IEEE80211R
1302 os_memcpy(sm->xxkey, psk, PMK_LEN);
1303 sm->xxkey_len = PMK_LEN;
1304#endif /* CONFIG_IEEE80211R */
1305 }
1306 sm->req_replay_counter_used = 0;
1307}
1308
1309
1310SM_STATE(WPA_PTK, PTKSTART)
1311{
1312 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1313 size_t pmkid_len = 0;
1314
1315 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1316 sm->PTKRequest = FALSE;
1317 sm->TimeoutEvt = FALSE;
1318 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1319 "sending 1/4 msg of 4-Way Handshake");
1320 /*
1321 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1322 * one possible PSK for this STA.
1323 */
1324 if (sm->wpa == WPA_VERSION_WPA2 &&
56586197 1325 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1326 pmkid = buf;
1327 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1328 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1329 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1330 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1331 if (sm->pmksa)
1332 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1333 sm->pmksa->pmkid, PMKID_LEN);
1334 else {
1335 /*
1336 * Calculate PMKID since no PMKSA cache entry was
1337 * available with pre-calculated PMKID.
1338 */
1339 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
56586197
JM		 1340 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1341 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1342 }
1343 }
1344 wpa_send_eapol(sm->wpa_auth, sm,
1345 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1346 sm->ANonce, pmkid, pmkid_len, 0, 0);
1347 sm->TimeoutCtr++;
1348}
1349
1350
1351static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1352 struct wpa_ptk *ptk)
1353{
1354#ifdef CONFIG_IEEE80211R
56586197 1355 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
6fc6879b
JM		 1356 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1357#endif /* CONFIG_IEEE80211R */
1358
1359 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1360 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
56586197
JM		 1361 (u8 *) ptk, sizeof(*ptk),
1362 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1363
1364 return 0;
1365}
1366
1367
1368SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1369{
1370 struct wpa_ptk PTK;
1371 int ok = 0;
1372 const u8 *pmk = NULL;
1373
1374 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1375 sm->EAPOLKeyReceived = FALSE;
1376
1377 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1378 * WPA-PSK: iterate through possible PSKs and select the one matching
1379 * the packet */
1380 for (;;) {
56586197 1381 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1382 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1383 if (pmk == NULL)
1384 break;
1385 } else
1386 pmk = sm->PMK;
1387
1388 wpa_derive_ptk(sm, pmk, &PTK);
1389
1390 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1391 sm->last_rx_eapol_key_len) == 0) {
1392 ok = 1;
1393 break;
1394 }
1395
56586197 1396 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 1397 break;
1398 }
1399
1400 if (!ok) {
1401 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1402 "invalid MIC in msg 2/4 of 4-Way Handshake");
1403 return;
1404 }
1405
1406 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1407
56586197 1408 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1409 /* PSK may have changed from the previous choice, so update
1410 * state machine data based on whatever PSK was selected here.
1411 */
1412 os_memcpy(sm->PMK, pmk, PMK_LEN);
1413 }
1414
1415 sm->MICVerified = TRUE;
1416
1417 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1418 sm->PTK_valid = TRUE;
1419}
1420
1421
1422SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1423{
1424 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1425 sm->TimeoutCtr = 0;
1426}
1427
1428
1429#ifdef CONFIG_IEEE80211W
1430
1431static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1432{
1433 if (sm->mgmt_frame_prot) {
1434 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1435 }
1436
1437 return 0;
1438}
1439
1440
1441static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1442{
1443 struct wpa_igtk_kde igtk;
1444 struct wpa_group *gsm = sm->group;
1445
1446 if (!sm->mgmt_frame_prot)
1447 return pos;
1448
1449 igtk.keyid[0] = gsm->GN_igtk;
1450 igtk.keyid[1] = 0;
1451 if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1452 < 0)
1453 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1454 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1455 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1456 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1457
1458 return pos;
1459}
1460
1461#else /* CONFIG_IEEE80211W */
1462
1463static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1464{
1465 return 0;
1466}
1467
1468
1469static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1470{
1471 return pos;
1472}
1473
1474#endif /* CONFIG_IEEE80211W */
1475
1476
1477SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1478{
1479 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1480 size_t gtk_len, kde_len;
1481 struct wpa_group *gsm = sm->group;
1482 u8 *wpa_ie;
1483 int wpa_ie_len, secure, keyidx, encr = 0;
1484
1485 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1486 sm->TimeoutEvt = FALSE;
1487 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1488 */
1489 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1490 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1491 wpa_ie = sm->wpa_auth->wpa_ie;
1492 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1493 if (sm->wpa == WPA_VERSION_WPA &&
1494 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1495 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1496 /* WPA-only STA, remove RSN IE */
1497 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1498 wpa_ie_len = wpa_ie[1] + 2;
1499 }
1500 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1501 "sending 3/4 msg of 4-Way Handshake");
1502 if (sm->wpa == WPA_VERSION_WPA2) {
1503 /* WPA2 send GTK in the 4-way handshake */
1504 secure = 1;
1505 gtk = gsm->GTK[gsm->GN - 1];
1506 gtk_len = gsm->GTK_len;
1507 keyidx = gsm->GN;
1508 _rsc = rsc;
1509 encr = 1;
1510 } else {
1511 /* WPA does not include GTK in msg 3/4 */
1512 secure = 0;
1513 gtk = NULL;
1514 gtk_len = 0;
1515 keyidx = 0;
1516 _rsc = NULL;
1517 }
1518
1519 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1520 if (gtk)
1521 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1522 kde = os_malloc(kde_len);
1523 if (kde == NULL)
1524 return;
1525
1526 pos = kde;
1527 os_memcpy(pos, wpa_ie, wpa_ie_len);
1528 pos += wpa_ie_len;
1529 if (gtk) {
1530 u8 hdr[2];
1531 hdr[0] = keyidx & 0x03;
1532 hdr[1] = 0;
1533 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1534 gtk, gtk_len);
1535 }
1536 pos = ieee80211w_kde_add(sm, pos);
1537
1538 wpa_send_eapol(sm->wpa_auth, sm,
1539 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1540 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1541 WPA_KEY_INFO_KEY_TYPE,
1542 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1543 os_free(kde);
1544 sm->TimeoutCtr++;
1545}
1546
1547
1548SM_STATE(WPA_PTK, PTKINITDONE)
1549{
1550 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1551 sm->EAPOLKeyReceived = FALSE;
1552 if (sm->Pair) {
1553 char *alg;
1554 int klen;
1555 if (sm->pairwise == WPA_CIPHER_TKIP) {
1556 alg = "TKIP";
1557 klen = 32;
1558 } else {
1559 alg = "CCMP";
1560 klen = 16;
1561 }
1562 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1563 sm->PTK.tk1, klen)) {
1564 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1565 return;
1566 }
1567 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1568 sm->pairwise_set = TRUE;
1569
581a8cde
JM		 1570 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1571 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1572 eloop_register_timeout(sm->wpa_auth->conf.
1573 wpa_ptk_rekey, 0, wpa_rekey_ptk,
1574 sm->wpa_auth, sm);
1575 }
1576
56586197 1577 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1578 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1579 WPA_EAPOL_authorized, 1);
1580 }
1581 }
1582
1583 if (0 /* IBSS == TRUE */) {
1584 sm->keycount++;
1585 if (sm->keycount == 2) {
1586 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1587 WPA_EAPOL_portValid, 1);
1588 }
1589 } else {
1590 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1591 1);
1592 }
1593 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1594 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1595 if (sm->wpa == WPA_VERSION_WPA)
1596 sm->PInitAKeys = TRUE;
1597 else
1598 sm->has_GTK = TRUE;
1599 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1600 "pairwise key handshake completed (%s)",
1601 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1602
1603#ifdef CONFIG_IEEE80211R
1604 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1605#endif /* CONFIG_IEEE80211R */
1606}
1607
1608
1609SM_STEP(WPA_PTK)
1610{
1611 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1612
1613 if (sm->Init)
1614 SM_ENTER(WPA_PTK, INITIALIZE);
1615 else if (sm->Disconnect
1616 /* || FIX: dot11RSNAConfigSALifetime timeout */)
1617 SM_ENTER(WPA_PTK, DISCONNECT);
1618 else if (sm->DeauthenticationRequest)
1619 SM_ENTER(WPA_PTK, DISCONNECTED);
1620 else if (sm->AuthenticationRequest)
1621 SM_ENTER(WPA_PTK, AUTHENTICATION);
1622 else if (sm->ReAuthenticationRequest)
1623 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1624 else if (sm->PTKRequest)
1625 SM_ENTER(WPA_PTK, PTKSTART);
1626 else switch (sm->wpa_ptk_state) {
1627 case WPA_PTK_INITIALIZE:
1628 break;
1629 case WPA_PTK_DISCONNECT:
1630 SM_ENTER(WPA_PTK, DISCONNECTED);
1631 break;
1632 case WPA_PTK_DISCONNECTED:
1633 SM_ENTER(WPA_PTK, INITIALIZE);
1634 break;
1635 case WPA_PTK_AUTHENTICATION:
1636 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1637 break;
1638 case WPA_PTK_AUTHENTICATION2:
56586197 1639 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1640 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1641 WPA_EAPOL_keyRun) > 0)
1642 SM_ENTER(WPA_PTK, INITPMK);
56586197 1643 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 1644 /* FIX: && 802.1X::keyRun */)
1645 SM_ENTER(WPA_PTK, INITPSK);
1646 break;
1647 case WPA_PTK_INITPMK:
1648 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1649 WPA_EAPOL_keyAvailable) > 0)
1650 SM_ENTER(WPA_PTK, PTKSTART);
1651 else {
1652 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1653 SM_ENTER(WPA_PTK, DISCONNECT);
1654 }
1655 break;
1656 case WPA_PTK_INITPSK:
1657 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1658 SM_ENTER(WPA_PTK, PTKSTART);
1659 else {
1660 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1661 "no PSK configured for the STA");
1662 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1663 SM_ENTER(WPA_PTK, DISCONNECT);
1664 }
1665 break;
1666 case WPA_PTK_PTKSTART:
1667 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1668 sm->EAPOLKeyPairwise)
1669 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1670 else if (sm->TimeoutCtr >
1671 (int) dot11RSNAConfigPairwiseUpdateCount) {
1672 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1673 SM_ENTER(WPA_PTK, DISCONNECT);
1674 } else if (sm->TimeoutEvt)
1675 SM_ENTER(WPA_PTK, PTKSTART);
1676 break;
1677 case WPA_PTK_PTKCALCNEGOTIATING:
1678 if (sm->MICVerified)
1679 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1680 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1681 sm->EAPOLKeyPairwise)
1682 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1683 else if (sm->TimeoutEvt)
1684 SM_ENTER(WPA_PTK, PTKSTART);
1685 break;
1686 case WPA_PTK_PTKCALCNEGOTIATING2:
1687 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1688 break;
1689 case WPA_PTK_PTKINITNEGOTIATING:
1690 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1691 sm->EAPOLKeyPairwise && sm->MICVerified)
1692 SM_ENTER(WPA_PTK, PTKINITDONE);
1693 else if (sm->TimeoutCtr >
1694 (int) dot11RSNAConfigPairwiseUpdateCount) {
1695 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1696 SM_ENTER(WPA_PTK, DISCONNECT);
1697 } else if (sm->TimeoutEvt)
1698 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1699 break;
1700 case WPA_PTK_PTKINITDONE:
1701 break;
1702 }
1703}
1704
1705
1706SM_STATE(WPA_PTK_GROUP, IDLE)
1707{
1708 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1709 if (sm->Init) {
1710 /* Init flag is not cleared here, so avoid busy
1711 * loop by claiming nothing changed. */
1712 sm->changed = FALSE;
1713 }
1714 sm->GTimeoutCtr = 0;
1715}
1716
1717
1718SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1719{
1720 u8 rsc[WPA_KEY_RSC_LEN];
1721 struct wpa_group *gsm = sm->group;
1722 u8 *kde, *pos, hdr[2];
1723 size_t kde_len;
1724
1725 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1726 if (sm->wpa == WPA_VERSION_WPA)
1727 sm->PInitAKeys = FALSE;
1728 sm->TimeoutEvt = FALSE;
1729 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1730 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1731 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1732 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1733 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1734 "sending 1/2 msg of Group Key Handshake");
1735
1736 if (sm->wpa == WPA_VERSION_WPA2) {
1737 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1738 ieee80211w_kde_len(sm);
1739 kde = os_malloc(kde_len);
1740 if (kde == NULL)
1741 return;
1742
1743 pos = kde;
1744 hdr[0] = gsm->GN & 0x03;
1745 hdr[1] = 0;
1746 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1747 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1748 pos = ieee80211w_kde_add(sm, pos);
1749 } else {
1750 kde = gsm->GTK[gsm->GN - 1];
1751 pos = kde + gsm->GTK_len;
1752 }
1753
1754 wpa_send_eapol(sm->wpa_auth, sm,
1755 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1756 WPA_KEY_INFO_ACK |
1757 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1758 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1759 if (sm->wpa == WPA_VERSION_WPA2)
1760 os_free(kde);
1761 sm->GTimeoutCtr++;
1762}
1763
1764
1765SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1766{
1767 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1768 sm->EAPOLKeyReceived = FALSE;
1769 if (sm->GUpdateStationKeys)
1770 sm->group->GKeyDoneStations--;
1771 sm->GUpdateStationKeys = FALSE;
1772 sm->GTimeoutCtr = 0;
1773 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1774 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1775 "group key handshake completed (%s)",
1776 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1777 sm->has_GTK = TRUE;
1778}
1779
1780
1781SM_STATE(WPA_PTK_GROUP, KEYERROR)
1782{
1783 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1784 if (sm->GUpdateStationKeys)
1785 sm->group->GKeyDoneStations--;
1786 sm->GUpdateStationKeys = FALSE;
1787 sm->Disconnect = TRUE;
1788}
1789
1790
1791SM_STEP(WPA_PTK_GROUP)
1792{
9663596f 1793 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 1794 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 1795 sm->PtkGroupInit = FALSE;
1796 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 1797 case WPA_PTK_GROUP_IDLE:
1798 if (sm->GUpdateStationKeys ||
1799 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1800 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1801 break;
1802 case WPA_PTK_GROUP_REKEYNEGOTIATING:
1803 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1804 !sm->EAPOLKeyPairwise && sm->MICVerified)
1805 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1806 else if (sm->GTimeoutCtr >
1807 (int) dot11RSNAConfigGroupUpdateCount)
1808 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1809 else if (sm->TimeoutEvt)
1810 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1811 break;
1812 case WPA_PTK_GROUP_KEYERROR:
1813 SM_ENTER(WPA_PTK_GROUP, IDLE);
1814 break;
1815 case WPA_PTK_GROUP_REKEYESTABLISHED:
1816 SM_ENTER(WPA_PTK_GROUP, IDLE);
1817 break;
1818 }
1819}
1820
1821
1822static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1823 struct wpa_group *group)
1824{
1825 int ret = 0;
1826
1827 /* FIX: is this the correct way of getting GNonce? */
1828 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1829 inc_byte_array(group->Counter, WPA_NONCE_LEN);
1830 wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1831 group->GTK[group->GN - 1], group->GTK_len);
1832
1833#ifdef CONFIG_IEEE80211W
1834 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1835 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1836 WPA_IGTK_LEN) < 0) {
1837 wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1838 "IGTK");
1839 ret = -1;
1840 }
1841 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1842 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1843 }
1844#endif /* CONFIG_IEEE80211W */
1845
1846 return ret;
1847}
1848
1849
1850static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1851 struct wpa_group *group)
1852{
1853 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1854 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1855 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1856 group->wpa_group_state = WPA_GROUP_GTK_INIT;
1857
1858 /* GTK[0..N] = 0 */
1859 os_memset(group->GTK, 0, sizeof(group->GTK));
1860 group->GN = 1;
1861 group->GM = 2;
1862#ifdef CONFIG_IEEE80211W
1863 group->GN_igtk = 4;
1864 group->GM_igtk = 5;
1865#endif /* CONFIG_IEEE80211W */
1866 /* GTK[GN] = CalcGTK() */
1867 wpa_gtk_update(wpa_auth, group);
1868}
1869
1870
1871static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1872{
1873 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1874 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1875 "Not in PTKINITDONE; skip Group Key update");
1876 return 0;
1877 }
9663596f
JM		 1878 if (sm->GUpdateStationKeys) {
1879 /*
1880 * This should not really happen, but just in case, make sure
1881 * we do not count the same STA twice in GKeyDoneStations.
1882 */
1883 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1884 "GUpdateStationKeys already set - do not "
1885 "increment GKeyDoneStations");
1886 } else {
1887 sm->group->GKeyDoneStations++;
1888 sm->GUpdateStationKeys = TRUE;
1889 }
6fc6879b
JM		 1890 wpa_sm_step(sm);
1891 return 0;
1892}
1893
1894
1895static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1896 struct wpa_group *group)
1897{
1898 int tmp;
1899
1900 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1901 "SETKEYS (VLAN-ID %d)", group->vlan_id);
1902 group->changed = TRUE;
1903 group->wpa_group_state = WPA_GROUP_SETKEYS;
1904 group->GTKReKey = FALSE;
1905 tmp = group->GM;
1906 group->GM = group->GN;
1907 group->GN = tmp;
1908#ifdef CONFIG_IEEE80211W
1909 tmp = group->GM_igtk;
1910 group->GM_igtk = group->GN_igtk;
1911 group->GN_igtk = tmp;
1912#endif /* CONFIG_IEEE80211W */
1913 /* "GKeyDoneStations = GNoStations" is done in more robust way by
1914 * counting the STAs that are marked with GUpdateStationKeys instead of
1915 * including all STAs that could be in not-yet-completed state. */
1916 wpa_gtk_update(wpa_auth, group);
1917
1918 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1919 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1920 group->GKeyDoneStations);
1921}
1922
1923
1924static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1925 struct wpa_group *group)
1926{
1927 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1928 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1929 group->changed = TRUE;
1930 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1931 wpa_auth_set_key(wpa_auth, group->vlan_id,
1932 wpa_alg_txt(wpa_auth->conf.wpa_group),
1933 NULL, group->GN, group->GTK[group->GN - 1],
1934 group->GTK_len);
1935
1936#ifdef CONFIG_IEEE80211W
1937 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1938 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
1939 NULL, group->GN_igtk,
1940 group->IGTK[group->GN_igtk - 4],
1941 WPA_IGTK_LEN);
1942 }
1943#endif /* CONFIG_IEEE80211W */
1944}
1945
1946
1947static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
1948 struct wpa_group *group)
1949{
1950 if (group->GInit) {
1951 wpa_group_gtk_init(wpa_auth, group);
1952 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
1953 group->GTKAuthenticator) {
1954 wpa_group_setkeysdone(wpa_auth, group);
1955 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
1956 group->GTKReKey) {
1957 wpa_group_setkeys(wpa_auth, group);
1958 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
1959 if (group->GKeyDoneStations == 0)
1960 wpa_group_setkeysdone(wpa_auth, group);
1961 else if (group->GTKReKey)
1962 wpa_group_setkeys(wpa_auth, group);
1963 }
1964}
1965
1966
1967static void wpa_sm_step(struct wpa_state_machine *sm)
1968{
1969 if (sm == NULL)
1970 return;
1971
1972 if (sm->in_step_loop) {
1973 /* This should not happen, but if it does, make sure we do not
1974 * end up freeing the state machine too early by exiting the
1975 * recursive call. */
1976 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
1977 return;
1978 }
1979
1980 sm->in_step_loop = 1;
1981 do {
1982 if (sm->pending_deinit)
1983 break;
1984
1985 sm->changed = FALSE;
1986 sm->wpa_auth->group->changed = FALSE;
1987
1988 SM_STEP_RUN(WPA_PTK);
1989 if (sm->pending_deinit)
1990 break;
1991 SM_STEP_RUN(WPA_PTK_GROUP);
1992 if (sm->pending_deinit)
1993 break;
1994 wpa_group_sm_step(sm->wpa_auth, sm->group);
1995 } while (sm->changed || sm->wpa_auth->group->changed);
1996 sm->in_step_loop = 0;
1997
1998 if (sm->pending_deinit) {
1999 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2000 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2001 wpa_free_sta_sm(sm);
2002 }
2003}
2004
2005
2006static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2007{
2008 struct wpa_state_machine *sm = eloop_ctx;
2009 wpa_sm_step(sm);
2010}
2011
2012
2013void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2014{
2015 if (sm == NULL)
2016 return;
2017 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2018}
2019
2020
2021void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2022{
2023 int tmp, i;
2024 struct wpa_group *group;
2025
2026 if (wpa_auth == NULL)
2027 return;
2028
2029 group = wpa_auth->group;
2030
2031 for (i = 0; i < 2; i++) {
2032 tmp = group->GM;
2033 group->GM = group->GN;
2034 group->GN = tmp;
2035#ifdef CONFIG_IEEE80211W
2036 tmp = group->GM_igtk;
2037 group->GM_igtk = group->GN_igtk;
2038 group->GN_igtk = tmp;
2039#endif /* CONFIG_IEEE80211W */
2040 wpa_gtk_update(wpa_auth, group);
2041 }
2042}
2043
2044
2045static const char * wpa_bool_txt(int bool)
2046{
2047 return bool ? "TRUE" : "FALSE";
2048}
2049
2050
2051static int wpa_cipher_bits(int cipher)
2052{
2053 switch (cipher) {
2054 case WPA_CIPHER_CCMP:
2055 return 128;
2056 case WPA_CIPHER_TKIP:
2057 return 256;
2058 case WPA_CIPHER_WEP104:
2059 return 104;
2060 case WPA_CIPHER_WEP40:
2061 return 40;
2062 default:
2063 return 0;
2064 }
2065}
2066
2067
2068#define RSN_SUITE "%02x-%02x-%02x-%d"
2069#define RSN_SUITE_ARG(s) \
2070((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2071
2072int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2073{
2074 int len = 0, ret;
2075 char pmkid_txt[PMKID_LEN * 2 + 1];
2076
2077 if (wpa_auth == NULL)
2078 return len;
2079
2080 ret = os_snprintf(buf + len, buflen - len,
2081 "dot11RSNAOptionImplemented=TRUE\n"
2082#ifdef CONFIG_RSN_PREAUTH
2083 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2084#else /* CONFIG_RSN_PREAUTH */
2085 "dot11RSNAPreauthenticationImplemented=FALSE\n"
2086#endif /* CONFIG_RSN_PREAUTH */
2087 "dot11RSNAEnabled=%s\n"
2088 "dot11RSNAPreauthenticationEnabled=%s\n",
2089 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2090 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2091 if (ret < 0 || (size_t) ret >= buflen - len)
2092 return len;
2093 len += ret;
2094
2095 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2096 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2097
2098 ret = os_snprintf(
2099 buf + len, buflen - len,
2100 "dot11RSNAConfigVersion=%u\n"
2101 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2102 /* FIX: dot11RSNAConfigGroupCipher */
2103 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2104 /* FIX: dot11RSNAConfigGroupRekeyTime */
2105 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2106 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2107 "dot11RSNAConfigGroupUpdateCount=%u\n"
2108 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2109 "dot11RSNAConfigGroupCipherSize=%u\n"
2110 "dot11RSNAConfigPMKLifetime=%u\n"
2111 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2112 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2113 "dot11RSNAConfigSATimeout=%u\n"
2114 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2115 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2116 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2117 "dot11RSNAPMKIDUsed=%s\n"
2118 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2119 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2120 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2121 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2122 "dot11RSNA4WayHandshakeFailures=%u\n"
2123 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2124 RSN_VERSION,
2125 !!wpa_auth->conf.wpa_strict_rekey,
2126 dot11RSNAConfigGroupUpdateCount,
2127 dot11RSNAConfigPairwiseUpdateCount,
2128 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2129 dot11RSNAConfigPMKLifetime,
2130 dot11RSNAConfigPMKReauthThreshold,
2131 dot11RSNAConfigSATimeout,
2132 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2133 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2134 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2135 pmkid_txt,
2136 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2137 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2138 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2139 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2140 wpa_auth->dot11RSNA4WayHandshakeFailures);
2141 if (ret < 0 || (size_t) ret >= buflen - len)
2142 return len;
2143 len += ret;
2144
2145 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2146 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2147
2148 /* Private MIB */
2149 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2150 wpa_auth->group->wpa_group_state);
2151 if (ret < 0 || (size_t) ret >= buflen - len)
2152 return len;
2153 len += ret;
2154
2155 return len;
2156}
2157
2158
2159int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2160{
2161 int len = 0, ret;
2162 u32 pairwise = 0;
2163
2164 if (sm == NULL)
2165 return 0;
2166
2167 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2168
2169 /* dot11RSNAStatsEntry */
2170
2171 if (sm->wpa == WPA_VERSION_WPA) {
2172 if (sm->pairwise == WPA_CIPHER_CCMP)
2173 pairwise = WPA_CIPHER_SUITE_CCMP;
2174 else if (sm->pairwise == WPA_CIPHER_TKIP)
2175 pairwise = WPA_CIPHER_SUITE_TKIP;
2176 else if (sm->pairwise == WPA_CIPHER_WEP104)
2177 pairwise = WPA_CIPHER_SUITE_WEP104;
2178 else if (sm->pairwise == WPA_CIPHER_WEP40)
2179 pairwise = WPA_CIPHER_SUITE_WEP40;
2180 else if (sm->pairwise == WPA_CIPHER_NONE)
2181 pairwise = WPA_CIPHER_SUITE_NONE;
2182 } else if (sm->wpa == WPA_VERSION_WPA2) {
2183 if (sm->pairwise == WPA_CIPHER_CCMP)
2184 pairwise = RSN_CIPHER_SUITE_CCMP;
2185 else if (sm->pairwise == WPA_CIPHER_TKIP)
2186 pairwise = RSN_CIPHER_SUITE_TKIP;
2187 else if (sm->pairwise == WPA_CIPHER_WEP104)
2188 pairwise = RSN_CIPHER_SUITE_WEP104;
2189 else if (sm->pairwise == WPA_CIPHER_WEP40)
2190 pairwise = RSN_CIPHER_SUITE_WEP40;
2191 else if (sm->pairwise == WPA_CIPHER_NONE)
2192 pairwise = RSN_CIPHER_SUITE_NONE;
2193 } else
2194 return 0;
2195
2196 ret = os_snprintf(
2197 buf + len, buflen - len,
2198 /* TODO: dot11RSNAStatsIndex */
2199 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2200 "dot11RSNAStatsVersion=1\n"
2201 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2202 /* TODO: dot11RSNAStatsTKIPICVErrors */
2203 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2204 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2205 /* TODO: dot11RSNAStatsCCMPReplays */
2206 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2207 /* TODO: dot11RSNAStatsTKIPReplays */,
2208 MAC2STR(sm->addr),
2209 RSN_SUITE_ARG(pairwise),
2210 sm->dot11RSNAStatsTKIPLocalMICFailures,
2211 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2212 if (ret < 0 || (size_t) ret >= buflen - len)
2213 return len;
2214 len += ret;
2215
2216 /* Private MIB */
2217 ret = os_snprintf(buf + len, buflen - len,
2218 "hostapdWPAPTKState=%d\n"
2219 "hostapdWPAPTKGroupState=%d\n",
2220 sm->wpa_ptk_state,
2221 sm->wpa_ptk_group_state);
2222 if (ret < 0 || (size_t) ret >= buflen - len)
2223 return len;
2224 len += ret;
2225
2226 return len;
2227}
2228
2229
2230void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2231{
2232 if (wpa_auth)
2233 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2234}
2235
2236
2237int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2238{
2239 return sm && sm->pairwise_set;
2240}
2241
2242
2243int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2244{
2245 if (sm == NULL)
2246 return -1;
2247 return sm->wpa_key_mgmt;
2248}
2249
2250
2251int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2252{
2253 if (sm == NULL)
2254 return 0;
2255 return sm->wpa;
2256}
2257
2258
2259int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2260 struct rsn_pmksa_cache_entry *entry)
2261{
2262 if (sm == NULL || sm->pmksa != entry)
2263 return -1;
2264 sm->pmksa = NULL;
2265 return 0;
2266}
2267
2268
2269struct rsn_pmksa_cache_entry *
2270wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2271{
2272 return sm ? sm->pmksa : NULL;
2273}
2274
2275
2276void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2277{
2278 if (sm)
2279 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2280}
2281
2282
2283const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2284{
2285 if (wpa_auth == NULL)
2286 return NULL;
2287 *len = wpa_auth->wpa_ie_len;
2288 return wpa_auth->wpa_ie;
2289}
2290
2291
2292int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2293 int session_timeout, struct eapol_state_machine *eapol)
2294{
2295 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2296 return -1;
2297
2298 if (pmksa_cache_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2299 sm->wpa_auth->addr, sm->addr, session_timeout,
56586197 2300 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 2301 return 0;
2302
2303 return -1;
2304}
2305
2306
2307int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2308 const u8 *pmk, size_t len, const u8 *sta_addr,
2309 int session_timeout,
2310 struct eapol_state_machine *eapol)
2311{
2312 if (wpa_auth == NULL)
2313 return -1;
2314
2315 if (pmksa_cache_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
56586197
JM		 2316 sta_addr, session_timeout, eapol,
2317 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 2318 return 0;
2319
2320 return -1;
2321}
2322
2323
2324static struct wpa_group *
2325wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2326{
2327 struct wpa_group *group;
2328
2329 if (wpa_auth == NULL || wpa_auth->group == NULL)
2330 return NULL;
2331
2332 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2333 vlan_id);
2334 group = wpa_group_init(wpa_auth, vlan_id);
2335 if (group == NULL)
2336 return NULL;
2337
2338 group->next = wpa_auth->group->next;
2339 wpa_auth->group->next = group;
2340
2341 return group;
2342}
2343
2344
2345int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2346{
2347 struct wpa_group *group;
2348
2349 if (sm == NULL || sm->wpa_auth == NULL)
2350 return 0;
2351
2352 group = sm->wpa_auth->group;
2353 while (group) {
2354 if (group->vlan_id == vlan_id)
2355 break;
2356 group = group->next;
2357 }
2358
2359 if (group == NULL) {
2360 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2361 if (group == NULL)
2362 return -1;
2363 }
2364
2365 if (sm->group == group)
2366 return 0;
2367
2368 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2369 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2370
2371 sm->group = group;
2372 return 0;
2373}
2374
2375#endif /* CONFIG_NATIVE_WINDOWS */
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