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[thirdparty/hostap.git] / src / ap / wpa_auth.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator
e6965d4e 3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
6fc6879b
JM		 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
6226e38d 15#include "utils/includes.h"
6fc6879b 16
6226e38d
JM		 17#include "utils/common.h"
18#include "utils/eloop.h"
19#include "utils/state_machine.h"
81f4f619 20#include "common/ieee802_11_defs.h"
03da66bd
JM		 21#include "crypto/aes_wrap.h"
22#include "crypto/crypto.h"
23#include "crypto/sha1.h"
24#include "crypto/sha256.h"
281c950b 25#include "eapol_auth/eapol_auth_sm.h"
6226e38d 26#include "ap_config.h"
6fc6879b 27#include "ieee802_11.h"
6226e38d
JM		 28#include "wpa_auth.h"
29#include "pmksa_cache_auth.h"
6fc6879b
JM		 30#include "wpa_auth_i.h"
31#include "wpa_auth_ie.h"
32
33#define STATE_MACHINE_DATA struct wpa_state_machine
34#define STATE_MACHINE_DEBUG_PREFIX "WPA"
35#define STATE_MACHINE_ADDR sm->addr
36
37
38static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 39static int wpa_sm_step(struct wpa_state_machine *sm);
6fc6879b
JM		 40static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
41static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
42static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
43 struct wpa_group *group);
581a8cde 44static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 45static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
46 struct wpa_group *group);
6fc6879b 47
bae61562
JM		 48static const u32 dot11RSNAConfigGroupUpdateCount = 4;
49static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
50static const u32 eapol_key_timeout_first = 100; /* ms */
51static const u32 eapol_key_timeout_subseq = 1000; /* ms */
6fc6879b
JM		 52
53/* TODO: make these configurable */
54static const int dot11RSNAConfigPMKLifetime = 43200;
55static const int dot11RSNAConfigPMKReauthThreshold = 70;
56static const int dot11RSNAConfigSATimeout = 60;
57
58
59static inline void wpa_auth_mic_failure_report(
60 struct wpa_authenticator *wpa_auth, const u8 *addr)
61{
62 if (wpa_auth->cb.mic_failure_report)
63 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
64}
65
66
67static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
68 const u8 *addr, wpa_eapol_variable var,
69 int value)
70{
71 if (wpa_auth->cb.set_eapol)
72 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
73}
74
75
76static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
77 const u8 *addr, wpa_eapol_variable var)
78{
79 if (wpa_auth->cb.get_eapol == NULL)
80 return -1;
81 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
82}
83
84
85static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
86 const u8 *addr, const u8 *prev_psk)
87{
88 if (wpa_auth->cb.get_psk == NULL)
89 return NULL;
90 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
91}
92
93
94static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
95 const u8 *addr, u8 *msk, size_t *len)
96{
97 if (wpa_auth->cb.get_msk == NULL)
98 return -1;
99 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
100}
101
102
103static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
104 int vlan_id,
71934751 105 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 106 u8 *key, size_t key_len)
107{
108 if (wpa_auth->cb.set_key == NULL)
109 return -1;
110 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
111 key, key_len);
112}
113
114
115static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
116 const u8 *addr, int idx, u8 *seq)
117{
118 if (wpa_auth->cb.get_seqnum == NULL)
119 return -1;
120 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
121}
122
123
6fc6879b
JM		 124static inline int
125wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
126 const u8 *data, size_t data_len, int encrypt)
127{
128 if (wpa_auth->cb.send_eapol == NULL)
129 return -1;
130 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
131 encrypt);
132}
133
134
135int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
136 int (*cb)(struct wpa_state_machine *sm, void *ctx),
137 void *cb_ctx)
138{
139 if (wpa_auth->cb.for_each_sta == NULL)
140 return 0;
141 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
142}
143
144
bf98f7f3
JM		 145int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
146 int (*cb)(struct wpa_authenticator *a, void *ctx),
147 void *cb_ctx)
148{
149 if (wpa_auth->cb.for_each_auth == NULL)
150 return 0;
151 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
152}
153
154
6fc6879b
JM		 155void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
156 logger_level level, const char *txt)
157{
158 if (wpa_auth->cb.logger == NULL)
159 return;
160 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
161}
162
163
164void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
165 logger_level level, const char *fmt, ...)
166{
167 char *format;
168 int maxlen;
169 va_list ap;
170
171 if (wpa_auth->cb.logger == NULL)
172 return;
173
174 maxlen = os_strlen(fmt) + 100;
175 format = os_malloc(maxlen);
176 if (!format)
177 return;
178
179 va_start(ap, fmt);
180 vsnprintf(format, maxlen, fmt, ap);
181 va_end(ap);
182
183 wpa_auth_logger(wpa_auth, addr, level, format);
184
185 os_free(format);
186}
187
188
189static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
190 const u8 *addr)
191{
192 if (wpa_auth->cb.disconnect == NULL)
193 return;
194 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
195 WLAN_REASON_PREV_AUTH_NOT_VALID);
196}
197
198
199static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
200{
56586197 201 int ret = 0;
6fc6879b 202#ifdef CONFIG_IEEE80211R
56586197
JM		 203 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
204 ret = 1;
6fc6879b 205#endif /* CONFIG_IEEE80211R */
56586197
JM		 206#ifdef CONFIG_IEEE80211W
207 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
208 ret = 1;
209#endif /* CONFIG_IEEE80211W */
210 return ret;
6fc6879b
JM		 211}
212
213
214static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
215{
216 struct wpa_authenticator *wpa_auth = eloop_ctx;
217
218 if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
219 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
220 "initialization.");
221 } else {
222 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
223 }
224
225 if (wpa_auth->conf.wpa_gmk_rekey) {
226 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
227 wpa_rekey_gmk, wpa_auth, NULL);
228 }
229}
230
231
232static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
233{
234 struct wpa_authenticator *wpa_auth = eloop_ctx;
235 struct wpa_group *group;
236
237 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
238 for (group = wpa_auth->group; group; group = group->next) {
239 group->GTKReKey = TRUE;
240 do {
241 group->changed = FALSE;
242 wpa_group_sm_step(wpa_auth, group);
243 } while (group->changed);
244 }
245
246 if (wpa_auth->conf.wpa_group_rekey) {
247 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
248 0, wpa_rekey_gtk, wpa_auth, NULL);
249 }
250}
251
252
581a8cde
JM		 253static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
254{
255 struct wpa_authenticator *wpa_auth = eloop_ctx;
256 struct wpa_state_machine *sm = timeout_ctx;
257
258 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
259 wpa_request_new_ptk(sm);
260 wpa_sm_step(sm);
261}
262
263
6fc6879b
JM		 264static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
265{
266 if (sm->pmksa == ctx)
267 sm->pmksa = NULL;
268 return 0;
269}
270
271
272static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
273 void *ctx)
274{
275 struct wpa_authenticator *wpa_auth = ctx;
276 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
277}
278
279
e6965d4e 280static void wpa_group_set_key_len(struct wpa_group *group, int cipher)
6fc6879b 281{
e6965d4e 282 switch (cipher) {
6fc6879b
JM		 283 case WPA_CIPHER_CCMP:
284 group->GTK_len = 16;
285 break;
286 case WPA_CIPHER_TKIP:
287 group->GTK_len = 32;
288 break;
289 case WPA_CIPHER_WEP104:
290 group->GTK_len = 13;
291 break;
292 case WPA_CIPHER_WEP40:
293 group->GTK_len = 5;
294 break;
295 }
e6965d4e
JM		 296}
297
298
299static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
300 int vlan_id)
301{
302 struct wpa_group *group;
303 u8 buf[ETH_ALEN + 8 + sizeof(group)];
304 u8 rkey[32];
305
306 group = os_zalloc(sizeof(struct wpa_group));
307 if (group == NULL)
308 return NULL;
309
310 group->GTKAuthenticator = TRUE;
311 group->vlan_id = vlan_id;
312
313 wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
6fc6879b
JM		 314
315 /* Counter = PRF-256(Random number, "Init Counter",
316 * Local MAC Address || Time)
317 */
318 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
319 wpa_get_ntp_timestamp(buf + ETH_ALEN);
320 os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
321 if (os_get_random(rkey, sizeof(rkey)) ||
322 os_get_random(group->GMK, WPA_GMK_LEN)) {
323 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
324 "initialization.");
325 os_free(group);
326 return NULL;
327 }
328
329 sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
330 group->Counter, WPA_NONCE_LEN);
331
332 group->GInit = TRUE;
333 wpa_group_sm_step(wpa_auth, group);
334 group->GInit = FALSE;
335 wpa_group_sm_step(wpa_auth, group);
336
337 return group;
338}
339
340
341/**
342 * wpa_init - Initialize WPA authenticator
343 * @addr: Authenticator address
344 * @conf: Configuration for WPA authenticator
a17df5fb 345 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 346 * Returns: Pointer to WPA authenticator data or %NULL on failure
347 */
348struct wpa_authenticator * wpa_init(const u8 *addr,
349 struct wpa_auth_config *conf,
350 struct wpa_auth_callbacks *cb)
351{
352 struct wpa_authenticator *wpa_auth;
353
354 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
355 if (wpa_auth == NULL)
356 return NULL;
357 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
358 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
359 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
360
361 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
362 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
363 os_free(wpa_auth);
364 return NULL;
365 }
366
367 wpa_auth->group = wpa_group_init(wpa_auth, 0);
368 if (wpa_auth->group == NULL) {
369 os_free(wpa_auth->wpa_ie);
370 os_free(wpa_auth);
371 return NULL;
372 }
373
4bb081f1
JM		 374 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
375 wpa_auth);
6fc6879b
JM		 376 if (wpa_auth->pmksa == NULL) {
377 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
378 os_free(wpa_auth->wpa_ie);
379 os_free(wpa_auth);
380 return NULL;
381 }
382
383#ifdef CONFIG_IEEE80211R
384 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
385 if (wpa_auth->ft_pmk_cache == NULL) {
386 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
387 os_free(wpa_auth->wpa_ie);
4bb081f1 388 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 389 os_free(wpa_auth);
390 return NULL;
391 }
392#endif /* CONFIG_IEEE80211R */
393
394 if (wpa_auth->conf.wpa_gmk_rekey) {
395 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
396 wpa_rekey_gmk, wpa_auth, NULL);
397 }
398
399 if (wpa_auth->conf.wpa_group_rekey) {
400 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
401 wpa_rekey_gtk, wpa_auth, NULL);
402 }
403
404 return wpa_auth;
405}
406
407
408/**
409 * wpa_deinit - Deinitialize WPA authenticator
410 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
411 */
412void wpa_deinit(struct wpa_authenticator *wpa_auth)
413{
414 struct wpa_group *group, *prev;
415
416 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
417 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
418
419#ifdef CONFIG_PEERKEY
420 while (wpa_auth->stsl_negotiations)
421 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
422#endif /* CONFIG_PEERKEY */
423
4bb081f1 424 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 425
426#ifdef CONFIG_IEEE80211R
427 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
428 wpa_auth->ft_pmk_cache = NULL;
429#endif /* CONFIG_IEEE80211R */
430
431 os_free(wpa_auth->wpa_ie);
432
433 group = wpa_auth->group;
434 while (group) {
435 prev = group;
436 group = group->next;
437 os_free(prev);
438 }
439
440 os_free(wpa_auth);
441}
442
443
444/**
445 * wpa_reconfig - Update WPA authenticator configuration
446 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
447 * @conf: Configuration for WPA authenticator
448 */
449int wpa_reconfig(struct wpa_authenticator *wpa_auth,
450 struct wpa_auth_config *conf)
451{
e6965d4e 452 struct wpa_group *group;
6fc6879b
JM		 453 if (wpa_auth == NULL)
454 return 0;
455
456 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 457 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
458 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
459 return -1;
460 }
461
e6965d4e
JM		 462 /*
463 * Reinitialize GTK to make sure it is suitable for the new
464 * configuration.
465 */
466 group = wpa_auth->group;
467 wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
468 group->GInit = TRUE;
469 wpa_group_sm_step(wpa_auth, group);
470 group->GInit = FALSE;
471 wpa_group_sm_step(wpa_auth, group);
472
6fc6879b
JM		 473 return 0;
474}
475
476
477struct wpa_state_machine *
478wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
479{
480 struct wpa_state_machine *sm;
481
482 sm = os_zalloc(sizeof(struct wpa_state_machine));
483 if (sm == NULL)
484 return NULL;
485 os_memcpy(sm->addr, addr, ETH_ALEN);
486
487 sm->wpa_auth = wpa_auth;
488 sm->group = wpa_auth->group;
489
490 return sm;
491}
492
493
6f9b5d16
JM		 494int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
495 struct wpa_state_machine *sm)
6fc6879b
JM		 496{
497 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 498 return -1;
6fc6879b
JM		 499
500#ifdef CONFIG_IEEE80211R
501 if (sm->ft_completed) {
502 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
503 "FT authentication already completed - do not "
504 "start 4-way handshake");
6f9b5d16 505 return 0;
6fc6879b
JM		 506 }
507#endif /* CONFIG_IEEE80211R */
508
509 if (sm->started) {
22a299ee 510 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 511 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 512 return wpa_sm_step(sm);
6fc6879b
JM		 513 }
514
515 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
516 "start authentication");
517 sm->started = 1;
518
519 sm->Init = TRUE;
e4a6ea1d 520 if (wpa_sm_step(sm) == 1)
6f9b5d16 521 return 1; /* should not really happen */
6fc6879b
JM		 522 sm->Init = FALSE;
523 sm->AuthenticationRequest = TRUE;
6f9b5d16 524 return wpa_sm_step(sm);
6fc6879b
JM		 525}
526
527
a8d05fca
JM		 528void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
529{
530 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
531 * reassociates back to the same AP while the previous entry for the
532 * STA has not yet been removed. */
533 if (sm == NULL)
534 return;
535
536 sm->wpa_key_mgmt = 0;
537}
538
539
6fc6879b
JM		 540static void wpa_free_sta_sm(struct wpa_state_machine *sm)
541{
0f857f43
JM		 542#ifdef CONFIG_IEEE80211R
543 os_free(sm->assoc_resp_ftie);
544#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 545 os_free(sm->last_rx_eapol_key);
546 os_free(sm->wpa_ie);
547 os_free(sm);
548}
549
550
551void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
552{
553 if (sm == NULL)
554 return;
555
556 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
557 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
558 "strict rekeying - force GTK rekey since STA "
559 "is leaving");
560 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
561 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
562 NULL);
563 }
564
565 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
566 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 567 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 568 if (sm->in_step_loop) {
569 /* Must not free state machine while wpa_sm_step() is running.
570 * Freeing will be completed in the end of wpa_sm_step(). */
571 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
572 "machine deinit for " MACSTR, MAC2STR(sm->addr));
573 sm->pending_deinit = 1;
574 } else
575 wpa_free_sta_sm(sm);
576}
577
578
579static void wpa_request_new_ptk(struct wpa_state_machine *sm)
580{
581 if (sm == NULL)
582 return;
583
584 sm->PTKRequest = TRUE;
585 sm->PTK_valid = 0;
586}
587
588
22a299ee
JM		 589static int wpa_replay_counter_valid(struct wpa_state_machine *sm,
590 const u8 *replay_counter)
591{
592 int i;
593 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
594 if (!sm->key_replay[i].valid)
595 break;
596 if (os_memcmp(replay_counter, sm->key_replay[i].counter,
597 WPA_REPLAY_COUNTER_LEN) == 0)
598 return 1;
599 }
600 return 0;
601}
602
603
0f857f43
JM		 604#ifdef CONFIG_IEEE80211R
605static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
606 struct wpa_state_machine *sm,
607 struct wpa_eapol_ie_parse *kde)
608{
609 struct wpa_ie_data ie;
610 struct rsn_mdie *mdie;
611
612 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
613 ie.num_pmkid != 1 || ie.pmkid == NULL) {
614 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
615 "FT 4-way handshake message 2/4");
616 return -1;
617 }
618
619 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
620 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
621 sm->sup_pmk_r1_name, PMKID_LEN);
622
623 if (!kde->mdie || !kde->ftie) {
624 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
625 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
626 return -1;
627 }
628
629 mdie = (struct rsn_mdie *) (kde->mdie + 2);
630 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
631 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
632 MOBILITY_DOMAIN_ID_LEN) != 0) {
633 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
634 return -1;
635 }
636
637 if (sm->assoc_resp_ftie &&
638 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
639 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
640 2 + sm->assoc_resp_ftie[1]) != 0)) {
641 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
642 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
643 kde->ftie, kde->ftie_len);
644 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
645 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
646 return -1;
647 }
648
649 return 0;
650}
651#endif /* CONFIG_IEEE80211R */
652
653
6fc6879b
JM		 654void wpa_receive(struct wpa_authenticator *wpa_auth,
655 struct wpa_state_machine *sm,
656 u8 *data, size_t data_len)
657{
658 struct ieee802_1x_hdr *hdr;
659 struct wpa_eapol_key *key;
660 u16 key_info, key_data_length;
661 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
662 SMK_M1, SMK_M3, SMK_ERROR } msg;
663 char *msgtxt;
664 struct wpa_eapol_ie_parse kde;
26e23750 665 int ft;
1566ec46
JM		 666 const u8 *eapol_key_ie;
667 size_t eapol_key_ie_len;
6fc6879b
JM		 668
669 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
670 return;
671
672 if (data_len < sizeof(*hdr) + sizeof(*key))
673 return;
674
675 hdr = (struct ieee802_1x_hdr *) data;
676 key = (struct wpa_eapol_key *) (hdr + 1);
677 key_info = WPA_GET_BE16(key->key_info);
678 key_data_length = WPA_GET_BE16(key->key_data_length);
679 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
680 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
681 "key_data overflow (%d > %lu)",
682 key_data_length,
683 (unsigned long) (data_len - sizeof(*hdr) -
684 sizeof(*key)));
685 return;
686 }
687
f8e96eb6
JM		 688 if (sm->wpa == WPA_VERSION_WPA2) {
689 if (key->type != EAPOL_KEY_TYPE_RSN) {
690 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
691 "unexpected type %d in RSN mode",
692 key->type);
693 return;
694 }
695 } else {
696 if (key->type != EAPOL_KEY_TYPE_WPA) {
697 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
698 "unexpected type %d in WPA mode",
699 key->type);
700 return;
701 }
702 }
703
6fc6879b
JM		 704 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
705 * are set */
706
707 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
708 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
709 if (key_info & WPA_KEY_INFO_ERROR) {
710 msg = SMK_ERROR;
711 msgtxt = "SMK Error";
712 } else {
713 msg = SMK_M1;
714 msgtxt = "SMK M1";
715 }
716 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
717 msg = SMK_M3;
718 msgtxt = "SMK M3";
719 } else if (key_info & WPA_KEY_INFO_REQUEST) {
720 msg = REQUEST;
721 msgtxt = "Request";
722 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
723 msg = GROUP_2;
724 msgtxt = "2/2 Group";
725 } else if (key_data_length == 0) {
726 msg = PAIRWISE_4;
727 msgtxt = "4/4 Pairwise";
728 } else {
729 msg = PAIRWISE_2;
730 msgtxt = "2/4 Pairwise";
731 }
732
733 /* TODO: key_info type validation for PeerKey */
734 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
735 msg == GROUP_2) {
736 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
737 if (sm->pairwise == WPA_CIPHER_CCMP) {
738 if (wpa_use_aes_cmac(sm) &&
739 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
740 wpa_auth_logger(wpa_auth, sm->addr,
741 LOGGER_WARNING,
742 "advertised support for "
743 "AES-128-CMAC, but did not "
744 "use it");
745 return;
746 }
747
748 if (!wpa_use_aes_cmac(sm) &&
749 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
750 wpa_auth_logger(wpa_auth, sm->addr,
751 LOGGER_WARNING,
752 "did not use HMAC-SHA1-AES "
753 "with CCMP");
754 return;
755 }
756 }
757 }
758
759 if (key_info & WPA_KEY_INFO_REQUEST) {
760 if (sm->req_replay_counter_used &&
761 os_memcmp(key->replay_counter, sm->req_replay_counter,
762 WPA_REPLAY_COUNTER_LEN) <= 0) {
763 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
764 "received EAPOL-Key request with "
765 "replayed counter");
766 return;
767 }
768 }
769
770 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
22a299ee
JM		 771 !wpa_replay_counter_valid(sm, key->replay_counter)) {
772 int i;
6fc6879b
JM		 773 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
774 "received EAPOL-Key %s with unexpected "
775 "replay counter", msgtxt);
22a299ee
JM		 776 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
777 if (!sm->key_replay[i].valid)
778 break;
779 wpa_hexdump(MSG_DEBUG, "pending replay counter",
780 sm->key_replay[i].counter,
781 WPA_REPLAY_COUNTER_LEN);
782 }
6fc6879b
JM		 783 wpa_hexdump(MSG_DEBUG, "received replay counter",
784 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
785 return;
786 }
787
788 switch (msg) {
789 case PAIRWISE_2:
790 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
791 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
792 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
793 "received EAPOL-Key msg 2/4 in "
794 "invalid state (%d) - dropped",
795 sm->wpa_ptk_state);
796 return;
797 }
1566ec46
JM		 798 if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length,
799 &kde) < 0) {
800 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
801 "received EAPOL-Key msg 2/4 with "
802 "invalid Key Data contents");
803 return;
804 }
805 if (kde.rsn_ie) {
806 eapol_key_ie = kde.rsn_ie;
807 eapol_key_ie_len = kde.rsn_ie_len;
808 } else {
809 eapol_key_ie = kde.wpa_ie;
810 eapol_key_ie_len = kde.wpa_ie_len;
811 }
26e23750
JM		 812 ft = sm->wpa == WPA_VERSION_WPA2 &&
813 wpa_key_mgmt_ft(sm->wpa_key_mgmt);
6fc6879b 814 if (sm->wpa_ie == NULL ||
26e23750
JM		 815 wpa_compare_rsn_ie(ft,
816 sm->wpa_ie, sm->wpa_ie_len,
1566ec46 817 eapol_key_ie, eapol_key_ie_len)) {
6fc6879b
JM		 818 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
819 "WPA IE from (Re)AssocReq did not "
820 "match with msg 2/4");
821 if (sm->wpa_ie) {
822 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
823 sm->wpa_ie, sm->wpa_ie_len);
824 }
825 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1566ec46 826 eapol_key_ie, eapol_key_ie_len);
6fc6879b
JM		 827 /* MLME-DEAUTHENTICATE.request */
828 wpa_sta_disconnect(wpa_auth, sm->addr);
829 return;
830 }
26e23750 831#ifdef CONFIG_IEEE80211R
0f857f43
JM		 832 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
833 wpa_sta_disconnect(wpa_auth, sm->addr);
834 return;
26e23750
JM		 835 }
836#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 837 break;
838 case PAIRWISE_4:
839 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
840 !sm->PTK_valid) {
841 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
842 "received EAPOL-Key msg 4/4 in "
843 "invalid state (%d) - dropped",
844 sm->wpa_ptk_state);
845 return;
846 }
847 break;
848 case GROUP_2:
849 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
850 || !sm->PTK_valid) {
851 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
852 "received EAPOL-Key msg 2/2 in "
853 "invalid state (%d) - dropped",
854 sm->wpa_ptk_group_state);
855 return;
856 }
857 break;
858#ifdef CONFIG_PEERKEY
859 case SMK_M1:
860 case SMK_M3:
861 case SMK_ERROR:
862 if (!wpa_auth->conf.peerkey) {
863 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
864 "PeerKey use disabled - ignoring message");
865 return;
866 }
867 if (!sm->PTK_valid) {
868 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
869 "received EAPOL-Key msg SMK in "
870 "invalid state - dropped");
871 return;
872 }
873 break;
874#else /* CONFIG_PEERKEY */
875 case SMK_M1:
876 case SMK_M3:
877 case SMK_ERROR:
878 return; /* STSL disabled - ignore SMK messages */
879#endif /* CONFIG_PEERKEY */
880 case REQUEST:
881 break;
882 }
883
884 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
885 "received EAPOL-Key frame (%s)", msgtxt);
886
887 if (key_info & WPA_KEY_INFO_ACK) {
888 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
889 "received invalid EAPOL-Key: Key Ack set");
890 return;
891 }
892
893 if (!(key_info & WPA_KEY_INFO_MIC)) {
894 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
895 "received invalid EAPOL-Key: Key MIC not set");
896 return;
897 }
898
899 sm->MICVerified = FALSE;
900 if (sm->PTK_valid) {
901 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
902 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
903 "received EAPOL-Key with invalid MIC");
904 return;
905 }
906 sm->MICVerified = TRUE;
907 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
908 }
909
910 if (key_info & WPA_KEY_INFO_REQUEST) {
911 if (sm->MICVerified) {
912 sm->req_replay_counter_used = 1;
913 os_memcpy(sm->req_replay_counter, key->replay_counter,
914 WPA_REPLAY_COUNTER_LEN);
915 } else {
916 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
917 "received EAPOL-Key request with "
918 "invalid MIC");
919 return;
920 }
921
922 /*
923 * TODO: should decrypt key data field if encryption was used;
924 * even though MAC address KDE is not normally encrypted,
925 * supplicant is allowed to encrypt it.
926 */
927 if (msg == SMK_ERROR) {
928#ifdef CONFIG_PEERKEY
929 wpa_smk_error(wpa_auth, sm, key);
930#endif /* CONFIG_PEERKEY */
931 return;
932 } else if (key_info & WPA_KEY_INFO_ERROR) {
933 /* Supplicant reported a Michael MIC error */
934 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
935 "received EAPOL-Key Error Request "
936 "(STA detected Michael MIC failure)");
937 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
938 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
939 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
940 /* Error report is not a request for a new key
941 * handshake, but since Authenticator may do it, let's
942 * change the keys now anyway. */
943 wpa_request_new_ptk(sm);
944 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
945 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
946 "received EAPOL-Key Request for new "
947 "4-Way Handshake");
948 wpa_request_new_ptk(sm);
949#ifdef CONFIG_PEERKEY
950 } else if (msg == SMK_M1) {
951 wpa_smk_m1(wpa_auth, sm, key);
952#endif /* CONFIG_PEERKEY */
953 } else if (key_data_length > 0 &&
954 wpa_parse_kde_ies((const u8 *) (key + 1),
955 key_data_length, &kde) == 0 &&
956 kde.mac_addr) {
957 } else {
958 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
959 "received EAPOL-Key Request for GTK "
960 "rekeying");
961 /* FIX: why was this triggering PTK rekeying for the
962 * STA that requested Group Key rekeying?? */
963 /* wpa_request_new_ptk(sta->wpa_sm); */
964 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
965 wpa_rekey_gtk(wpa_auth, NULL);
966 }
967 } else {
22a299ee
JM		 968 /* Do not allow the same key replay counter to be reused. This
969 * does also invalidate all other pending replay counters if
970 * retransmissions were used, i.e., we will only process one of
971 * the pending replies and ignore rest if more than one is
972 * received. */
973 sm->key_replay[0].valid = FALSE;
6fc6879b
JM		 974 }
975
976#ifdef CONFIG_PEERKEY
977 if (msg == SMK_M3) {
978 wpa_smk_m3(wpa_auth, sm, key);
979 return;
980 }
981#endif /* CONFIG_PEERKEY */
982
983 os_free(sm->last_rx_eapol_key);
984 sm->last_rx_eapol_key = os_malloc(data_len);
985 if (sm->last_rx_eapol_key == NULL)
986 return;
987 os_memcpy(sm->last_rx_eapol_key, data, data_len);
988 sm->last_rx_eapol_key_len = data_len;
989
990 sm->EAPOLKeyReceived = TRUE;
991 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
992 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
993 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
994 wpa_sm_step(sm);
995}
996
997
998static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
999 u8 *gtk, size_t gtk_len)
1000{
1001 u8 data[ETH_ALEN + WPA_NONCE_LEN];
1002
1003 /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
1004 os_memcpy(data, addr, ETH_ALEN);
1005 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1006
56586197
JM		 1007#ifdef CONFIG_IEEE80211W
1008 sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
1009 data, sizeof(data), gtk, gtk_len);
1010#else /* CONFIG_IEEE80211W */
6fc6879b
JM		 1011 sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
1012 data, sizeof(data), gtk, gtk_len);
56586197 1013#endif /* CONFIG_IEEE80211W */
6fc6879b
JM		 1014
1015 wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
1016 wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
1017}
1018
1019
1020static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1021{
1022 struct wpa_authenticator *wpa_auth = eloop_ctx;
1023 struct wpa_state_machine *sm = timeout_ctx;
1024
1025 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1026 sm->TimeoutEvt = TRUE;
1027 wpa_sm_step(sm);
1028}
1029
1030
1031void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1032 struct wpa_state_machine *sm, int key_info,
1033 const u8 *key_rsc, const u8 *nonce,
1034 const u8 *kde, size_t kde_len,
1035 int keyidx, int encr, int force_version)
1036{
1037 struct ieee802_1x_hdr *hdr;
1038 struct wpa_eapol_key *key;
1039 size_t len;
1040 int alg;
1041 int key_data_len, pad_len = 0;
1042 u8 *buf, *pos;
1043 int version, pairwise;
22a299ee 1044 int i;
6fc6879b
JM		 1045
1046 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
1047
1048 if (force_version)
1049 version = force_version;
1050 else if (wpa_use_aes_cmac(sm))
1051 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1052 else if (sm->pairwise == WPA_CIPHER_CCMP)
1053 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1054 else
1055 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1056
1057 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1058
1059 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1060 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1061 "encr=%d)",
1062 version,
1063 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1064 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1065 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1066 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1067 pairwise, (unsigned long) kde_len, keyidx, encr);
1068
1069 key_data_len = kde_len;
1070
1071 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1072 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1073 pad_len = key_data_len % 8;
1074 if (pad_len)
1075 pad_len = 8 - pad_len;
1076 key_data_len += pad_len + 8;
1077 }
1078
1079 len += key_data_len;
1080
1081 hdr = os_zalloc(len);
1082 if (hdr == NULL)
1083 return;
1084 hdr->version = wpa_auth->conf.eapol_version;
1085 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1086 hdr->length = host_to_be16(len - sizeof(*hdr));
1087 key = (struct wpa_eapol_key *) (hdr + 1);
1088
1089 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1090 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1091 key_info |= version;
1092 if (encr && sm->wpa == WPA_VERSION_WPA2)
1093 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1094 if (sm->wpa != WPA_VERSION_WPA2)
1095 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1096 WPA_PUT_BE16(key->key_info, key_info);
1097
1098 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1099 switch (alg) {
1100 case WPA_CIPHER_CCMP:
1101 WPA_PUT_BE16(key->key_length, 16);
1102 break;
1103 case WPA_CIPHER_TKIP:
1104 WPA_PUT_BE16(key->key_length, 32);
1105 break;
1106 case WPA_CIPHER_WEP40:
1107 WPA_PUT_BE16(key->key_length, 5);
1108 break;
1109 case WPA_CIPHER_WEP104:
1110 WPA_PUT_BE16(key->key_length, 13);
1111 break;
1112 }
1113 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1114 WPA_PUT_BE16(key->key_length, 0);
1115
1116 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1117 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1118 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1119 os_memcpy(sm->key_replay[i].counter,
1120 sm->key_replay[i - 1].counter,
1121 WPA_REPLAY_COUNTER_LEN);
1122 }
1123 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1124 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1125 WPA_REPLAY_COUNTER_LEN);
22a299ee 1126 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1127
1128 if (nonce)
1129 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1130
1131 if (key_rsc)
1132 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1133
1134 if (kde && !encr) {
1135 os_memcpy(key + 1, kde, kde_len);
1136 WPA_PUT_BE16(key->key_data_length, kde_len);
1137 } else if (encr && kde) {
1138 buf = os_zalloc(key_data_len);
1139 if (buf == NULL) {
1140 os_free(hdr);
1141 return;
1142 }
1143 pos = buf;
1144 os_memcpy(pos, kde, kde_len);
1145 pos += kde_len;
1146
1147 if (pad_len)
1148 *pos++ = 0xdd;
1149
1150 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1151 buf, key_data_len);
1152 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1153 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1154 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1155 (u8 *) (key + 1))) {
1156 os_free(hdr);
1157 os_free(buf);
1158 return;
1159 }
1160 WPA_PUT_BE16(key->key_data_length, key_data_len);
1161 } else {
1162 u8 ek[32];
1163 os_memcpy(key->key_iv,
1164 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1165 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1166 os_memcpy(ek, key->key_iv, 16);
1167 os_memcpy(ek + 16, sm->PTK.kek, 16);
1168 os_memcpy(key + 1, buf, key_data_len);
1169 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1170 WPA_PUT_BE16(key->key_data_length, key_data_len);
1171 }
1172 os_free(buf);
1173 }
1174
1175 if (key_info & WPA_KEY_INFO_MIC) {
1176 if (!sm->PTK_valid) {
1177 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1178 "PTK not valid when sending EAPOL-Key "
1179 "frame");
1180 os_free(hdr);
1181 return;
1182 }
1183 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1184 key->key_mic);
1185 }
1186
1187 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1188 1);
1189 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1190 sm->pairwise_set);
1191 os_free(hdr);
1192}
1193
1194
1195static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1196 struct wpa_state_machine *sm, int key_info,
1197 const u8 *key_rsc, const u8 *nonce,
1198 const u8 *kde, size_t kde_len,
1199 int keyidx, int encr)
1200{
1201 int timeout_ms;
1202 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
bae61562 1203 int ctr;
6fc6879b
JM		 1204
1205 if (sm == NULL)
1206 return;
1207
1208 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1209 keyidx, encr, 0);
1210
bae61562
JM		 1211 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1212 if (ctr == 1)
1213 timeout_ms = eapol_key_timeout_first;
1214 else
1215 timeout_ms = eapol_key_timeout_subseq;
6fc6879b
JM		 1216 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1217 wpa_send_eapol_timeout, wpa_auth, sm);
1218}
1219
1220
1221static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1222{
1223 struct ieee802_1x_hdr *hdr;
1224 struct wpa_eapol_key *key;
1225 u16 key_info;
1226 int ret = 0;
1227 u8 mic[16];
1228
1229 if (data_len < sizeof(*hdr) + sizeof(*key))
1230 return -1;
1231
1232 hdr = (struct ieee802_1x_hdr *) data;
1233 key = (struct wpa_eapol_key *) (hdr + 1);
1234 key_info = WPA_GET_BE16(key->key_info);
1235 os_memcpy(mic, key->key_mic, 16);
1236 os_memset(key->key_mic, 0, 16);
1237 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1238 data, data_len, key->key_mic) ||
1239 os_memcmp(mic, key->key_mic, 16) != 0)
1240 ret = -1;
1241 os_memcpy(key->key_mic, mic, 16);
1242 return ret;
1243}
1244
1245
1246void wpa_remove_ptk(struct wpa_state_machine *sm)
1247{
1248 sm->PTK_valid = FALSE;
1249 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
89d39d9d
JM		 1250 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, (u8 *) "",
1251 0);
6fc6879b 1252 sm->pairwise_set = FALSE;
581a8cde 1253 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1254}
1255
1256
6f9b5d16 1257int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
6fc6879b 1258{
5d22a1d5
JM		 1259 int remove_ptk = 1;
1260
6fc6879b 1261 if (sm == NULL)
6f9b5d16 1262 return -1;
6fc6879b
JM		 1263
1264 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1265 "event %d notification", event);
1266
1267 switch (event) {
1268 case WPA_AUTH:
1269 case WPA_ASSOC:
1270 break;
1271 case WPA_DEAUTH:
1272 case WPA_DISASSOC:
1273 sm->DeauthenticationRequest = TRUE;
1274 break;
1275 case WPA_REAUTH:
1276 case WPA_REAUTH_EAPOL:
9663596f
JM		 1277 if (sm->GUpdateStationKeys) {
1278 /*
1279 * Reauthentication cancels the pending group key
1280 * update for this STA.
1281 */
1282 sm->group->GKeyDoneStations--;
1283 sm->GUpdateStationKeys = FALSE;
1284 sm->PtkGroupInit = TRUE;
1285 }
6fc6879b
JM		 1286 sm->ReAuthenticationRequest = TRUE;
1287 break;
1288 case WPA_ASSOC_FT:
1289#ifdef CONFIG_IEEE80211R
81a658d7
JM		 1290 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1291 "after association");
1292 wpa_ft_install_ptk(sm);
1293
6fc6879b
JM		 1294 /* Using FT protocol, not WPA auth state machine */
1295 sm->ft_completed = 1;
6f9b5d16 1296 return 0;
6fc6879b
JM		 1297#else /* CONFIG_IEEE80211R */
1298 break;
1299#endif /* CONFIG_IEEE80211R */
1300 }
1301
1302#ifdef CONFIG_IEEE80211R
1303 sm->ft_completed = 0;
1304#endif /* CONFIG_IEEE80211R */
1305
5d22a1d5
JM		 1306#ifdef CONFIG_IEEE80211W
1307 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1308 remove_ptk = 0;
1309#endif /* CONFIG_IEEE80211W */
6fc6879b 1310
5d22a1d5
JM		 1311 if (remove_ptk) {
1312 sm->PTK_valid = FALSE;
1313 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1314
1315 if (event != WPA_REAUTH_EAPOL)
1316 wpa_remove_ptk(sm);
1317 }
6fc6879b 1318
6f9b5d16 1319 return wpa_sm_step(sm);
6fc6879b
JM		 1320}
1321
1322
71934751 1323static enum wpa_alg wpa_alg_enum(int alg)
6fc6879b
JM		 1324{
1325 switch (alg) {
1326 case WPA_CIPHER_CCMP:
89d39d9d 1327 return WPA_ALG_CCMP;
6fc6879b 1328 case WPA_CIPHER_TKIP:
89d39d9d 1329 return WPA_ALG_TKIP;
6fc6879b
JM		 1330 case WPA_CIPHER_WEP104:
1331 case WPA_CIPHER_WEP40:
89d39d9d 1332 return WPA_ALG_WEP;
6fc6879b 1333 default:
89d39d9d 1334 return WPA_ALG_NONE;
6fc6879b
JM		 1335 }
1336}
1337
1338
1339SM_STATE(WPA_PTK, INITIALIZE)
1340{
1341 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1342 if (sm->Init) {
1343 /* Init flag is not cleared here, so avoid busy
1344 * loop by claiming nothing changed. */
1345 sm->changed = FALSE;
1346 }
1347
1348 sm->keycount = 0;
1349 if (sm->GUpdateStationKeys)
1350 sm->group->GKeyDoneStations--;
1351 sm->GUpdateStationKeys = FALSE;
1352 if (sm->wpa == WPA_VERSION_WPA)
1353 sm->PInitAKeys = FALSE;
1354 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1355 * Local AA > Remote AA)) */) {
1356 sm->Pair = TRUE;
1357 }
1358 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1359 wpa_remove_ptk(sm);
1360 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1361 sm->TimeoutCtr = 0;
56586197 1362 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1363 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1364 WPA_EAPOL_authorized, 0);
1365 }
1366}
1367
1368
1369SM_STATE(WPA_PTK, DISCONNECT)
1370{
1371 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1372 sm->Disconnect = FALSE;
1373 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1374}
1375
1376
1377SM_STATE(WPA_PTK, DISCONNECTED)
1378{
1379 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1380 sm->DeauthenticationRequest = FALSE;
1381}
1382
1383
1384SM_STATE(WPA_PTK, AUTHENTICATION)
1385{
1386 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1387 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1388 sm->PTK_valid = FALSE;
1389 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1390 1);
1391 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1392 sm->AuthenticationRequest = FALSE;
1393}
1394
1395
1396SM_STATE(WPA_PTK, AUTHENTICATION2)
1397{
1398 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1399 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1400 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1401 sm->ReAuthenticationRequest = FALSE;
1402 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1403 * logical place than INITIALIZE since AUTHENTICATION2 can be
1404 * re-entered on ReAuthenticationRequest without going through
1405 * INITIALIZE. */
1406 sm->TimeoutCtr = 0;
1407}
1408
1409
1410SM_STATE(WPA_PTK, INITPMK)
1411{
1412 u8 msk[2 * PMK_LEN];
1413 size_t len = 2 * PMK_LEN;
1414
1415 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1416#ifdef CONFIG_IEEE80211R
1417 sm->xxkey_len = 0;
1418#endif /* CONFIG_IEEE80211R */
1419 if (sm->pmksa) {
1420 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1421 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1422 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1423 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1424 "(len=%lu)", (unsigned long) len);
1425 os_memcpy(sm->PMK, msk, PMK_LEN);
1426#ifdef CONFIG_IEEE80211R
1427 if (len >= 2 * PMK_LEN) {
1428 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1429 sm->xxkey_len = PMK_LEN;
1430 }
1431#endif /* CONFIG_IEEE80211R */
1432 } else {
1433 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1434 }
1435
1436 sm->req_replay_counter_used = 0;
1437 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1438 * will break reauthentication since EAPOL state machines may not be
1439 * get into AUTHENTICATING state that clears keyRun before WPA state
1440 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1441 * state and takes PMK from the previously used AAA Key. This will
1442 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1443 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1444 * be good workaround for this issue. */
1445 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1446}
1447
1448
1449SM_STATE(WPA_PTK, INITPSK)
1450{
1451 const u8 *psk;
1452 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1453 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1454 if (psk) {
1455 os_memcpy(sm->PMK, psk, PMK_LEN);
1456#ifdef CONFIG_IEEE80211R
1457 os_memcpy(sm->xxkey, psk, PMK_LEN);
1458 sm->xxkey_len = PMK_LEN;
1459#endif /* CONFIG_IEEE80211R */
1460 }
1461 sm->req_replay_counter_used = 0;
1462}
1463
1464
1465SM_STATE(WPA_PTK, PTKSTART)
1466{
1467 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1468 size_t pmkid_len = 0;
1469
1470 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1471 sm->PTKRequest = FALSE;
1472 sm->TimeoutEvt = FALSE;
bae61562
JM		 1473
1474 sm->TimeoutCtr++;
1475 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1476 /* No point in sending the EAPOL-Key - we will disconnect
1477 * immediately following this. */
1478 return;
1479 }
1480
6fc6879b
JM		 1481 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1482 "sending 1/4 msg of 4-Way Handshake");
1483 /*
1484 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1485 * one possible PSK for this STA.
1486 */
1487 if (sm->wpa == WPA_VERSION_WPA2 &&
56586197 1488 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1489 pmkid = buf;
1490 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1491 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1492 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1493 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1494 if (sm->pmksa)
1495 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1496 sm->pmksa->pmkid, PMKID_LEN);
1497 else {
1498 /*
1499 * Calculate PMKID since no PMKSA cache entry was
1500 * available with pre-calculated PMKID.
1501 */
1502 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
56586197
JM		 1503 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1504 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1505 }
1506 }
1507 wpa_send_eapol(sm->wpa_auth, sm,
1508 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1509 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 1510}
1511
1512
1513static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1514 struct wpa_ptk *ptk)
1515{
c0a61908 1516 size_t ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
6fc6879b 1517#ifdef CONFIG_IEEE80211R
56586197 1518 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
c0a61908 1519 return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
6fc6879b
JM		 1520#endif /* CONFIG_IEEE80211R */
1521
1522 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1523 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
c0a61908 1524 (u8 *) ptk, ptk_len,
56586197 1525 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1526
1527 return 0;
1528}
1529
1530
1531SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1532{
1533 struct wpa_ptk PTK;
1534 int ok = 0;
1535 const u8 *pmk = NULL;
1536
1537 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1538 sm->EAPOLKeyReceived = FALSE;
1539
1540 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1541 * WPA-PSK: iterate through possible PSKs and select the one matching
1542 * the packet */
1543 for (;;) {
56586197 1544 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1545 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1546 if (pmk == NULL)
1547 break;
1548 } else
1549 pmk = sm->PMK;
1550
1551 wpa_derive_ptk(sm, pmk, &PTK);
1552
1553 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1554 sm->last_rx_eapol_key_len) == 0) {
1555 ok = 1;
1556 break;
1557 }
1558
56586197 1559 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 1560 break;
1561 }
1562
1563 if (!ok) {
1564 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1565 "invalid MIC in msg 2/4 of 4-Way Handshake");
1566 return;
1567 }
1568
26e23750
JM		 1569#ifdef CONFIG_IEEE80211R
1570 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1571 /*
1572 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
1573 * with the value we derived.
1574 */
1575 if (os_memcmp(sm->sup_pmk_r1_name, sm->pmk_r1_name,
1576 WPA_PMK_NAME_LEN) != 0) {
1577 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1578 "PMKR1Name mismatch in FT 4-way "
1579 "handshake");
1580 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
1581 "Supplicant",
1582 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
1583 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
1584 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
1585 return;
1586 }
1587 }
1588#endif /* CONFIG_IEEE80211R */
1589
6fc6879b
JM		 1590 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1591
56586197 1592 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1593 /* PSK may have changed from the previous choice, so update
1594 * state machine data based on whatever PSK was selected here.
1595 */
1596 os_memcpy(sm->PMK, pmk, PMK_LEN);
1597 }
1598
1599 sm->MICVerified = TRUE;
1600
1601 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1602 sm->PTK_valid = TRUE;
1603}
1604
1605
1606SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1607{
1608 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1609 sm->TimeoutCtr = 0;
1610}
1611
1612
1613#ifdef CONFIG_IEEE80211W
1614
1615static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1616{
1617 if (sm->mgmt_frame_prot) {
1618 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1619 }
1620
1621 return 0;
1622}
1623
1624
1625static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1626{
1627 struct wpa_igtk_kde igtk;
1628 struct wpa_group *gsm = sm->group;
1629
1630 if (!sm->mgmt_frame_prot)
1631 return pos;
1632
1633 igtk.keyid[0] = gsm->GN_igtk;
1634 igtk.keyid[1] = 0;
7b1080da
JM		 1635 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
1636 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn) < 0)
6fc6879b
JM		 1637 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1638 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1639 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1640 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1641
1642 return pos;
1643}
1644
1645#else /* CONFIG_IEEE80211W */
1646
1647static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1648{
1649 return 0;
1650}
1651
1652
1653static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1654{
1655 return pos;
1656}
1657
1658#endif /* CONFIG_IEEE80211W */
1659
1660
1661SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1662{
1663 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1664 size_t gtk_len, kde_len;
1665 struct wpa_group *gsm = sm->group;
1666 u8 *wpa_ie;
1667 int wpa_ie_len, secure, keyidx, encr = 0;
1668
1669 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1670 sm->TimeoutEvt = FALSE;
bae61562
JM		 1671
1672 sm->TimeoutCtr++;
1673 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1674 /* No point in sending the EAPOL-Key - we will disconnect
1675 * immediately following this. */
1676 return;
1677 }
1678
86dfabb8
JM		 1679 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
1680 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 1681 */
1682 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1683 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 1684 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 1685 wpa_ie = sm->wpa_auth->wpa_ie;
1686 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1687 if (sm->wpa == WPA_VERSION_WPA &&
1688 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1689 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1690 /* WPA-only STA, remove RSN IE */
1691 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1692 wpa_ie_len = wpa_ie[1] + 2;
1693 }
1694 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1695 "sending 3/4 msg of 4-Way Handshake");
1696 if (sm->wpa == WPA_VERSION_WPA2) {
1697 /* WPA2 send GTK in the 4-way handshake */
1698 secure = 1;
1699 gtk = gsm->GTK[gsm->GN - 1];
1700 gtk_len = gsm->GTK_len;
1701 keyidx = gsm->GN;
1702 _rsc = rsc;
1703 encr = 1;
1704 } else {
1705 /* WPA does not include GTK in msg 3/4 */
1706 secure = 0;
1707 gtk = NULL;
1708 gtk_len = 0;
1709 keyidx = 0;
1710 _rsc = NULL;
1711 }
1712
1713 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1714 if (gtk)
1715 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
26e23750 1716#ifdef CONFIG_IEEE80211R
86dfabb8
JM		 1717 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1718 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
1719 kde_len += 300; /* FTIE + 2 * TIE */
1720 }
26e23750 1721#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 1722 kde = os_malloc(kde_len);
1723 if (kde == NULL)
1724 return;
1725
1726 pos = kde;
1727 os_memcpy(pos, wpa_ie, wpa_ie_len);
1728 pos += wpa_ie_len;
26e23750
JM		 1729#ifdef CONFIG_IEEE80211R
1730 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1731 int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
1732 if (res < 0) {
1733 wpa_printf(MSG_ERROR, "FT: Failed to insert "
1734 "PMKR1Name into RSN IE in EAPOL-Key data");
1735 os_free(kde);
1736 return;
1737 }
1738 pos += res;
1739 }
1740#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 1741 if (gtk) {
1742 u8 hdr[2];
1743 hdr[0] = keyidx & 0x03;
1744 hdr[1] = 0;
1745 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1746 gtk, gtk_len);
1747 }
1748 pos = ieee80211w_kde_add(sm, pos);
1749
86dfabb8
JM		 1750#ifdef CONFIG_IEEE80211R
1751 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1752 int res;
1753 struct wpa_auth_config *conf;
1754
1755 conf = &sm->wpa_auth->conf;
1756 res = wpa_write_ftie(conf, conf->r0_key_holder,
1757 conf->r0_key_holder_len,
1758 NULL, NULL, pos, kde + kde_len - pos,
1759 NULL, 0);
1760 if (res < 0) {
1761 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
1762 "into EAPOL-Key Key Data");
1763 os_free(kde);
1764 return;
1765 }
1766 pos += res;
1767
1768 /* TIE[ReassociationDeadline] (TU) */
1769 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1770 *pos++ = 5;
1771 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
1772 WPA_PUT_LE32(pos, conf->reassociation_deadline);
1773 pos += 4;
1774
1775 /* TIE[KeyLifetime] (seconds) */
1776 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1777 *pos++ = 5;
1778 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
1779 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
1780 pos += 4;
1781 }
1782#endif /* CONFIG_IEEE80211R */
1783
6fc6879b
JM		 1784 wpa_send_eapol(sm->wpa_auth, sm,
1785 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1786 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1787 WPA_KEY_INFO_KEY_TYPE,
1788 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1789 os_free(kde);
6fc6879b
JM		 1790}
1791
1792
1793SM_STATE(WPA_PTK, PTKINITDONE)
1794{
1795 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1796 sm->EAPOLKeyReceived = FALSE;
1797 if (sm->Pair) {
71934751 1798 enum wpa_alg alg;
6fc6879b
JM		 1799 int klen;
1800 if (sm->pairwise == WPA_CIPHER_TKIP) {
89d39d9d 1801 alg = WPA_ALG_TKIP;
6fc6879b
JM		 1802 klen = 32;
1803 } else {
89d39d9d 1804 alg = WPA_ALG_CCMP;
6fc6879b
JM		 1805 klen = 16;
1806 }
1807 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1808 sm->PTK.tk1, klen)) {
1809 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1810 return;
1811 }
1812 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1813 sm->pairwise_set = TRUE;
1814
581a8cde
JM		 1815 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1816 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1817 eloop_register_timeout(sm->wpa_auth->conf.
1818 wpa_ptk_rekey, 0, wpa_rekey_ptk,
1819 sm->wpa_auth, sm);
1820 }
1821
56586197 1822 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1823 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1824 WPA_EAPOL_authorized, 1);
1825 }
1826 }
1827
1828 if (0 /* IBSS == TRUE */) {
1829 sm->keycount++;
1830 if (sm->keycount == 2) {
1831 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1832 WPA_EAPOL_portValid, 1);
1833 }
1834 } else {
1835 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1836 1);
1837 }
1838 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1839 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1840 if (sm->wpa == WPA_VERSION_WPA)
1841 sm->PInitAKeys = TRUE;
1842 else
1843 sm->has_GTK = TRUE;
1844 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1845 "pairwise key handshake completed (%s)",
1846 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1847
1848#ifdef CONFIG_IEEE80211R
1849 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1850#endif /* CONFIG_IEEE80211R */
1851}
1852
1853
1854SM_STEP(WPA_PTK)
1855{
1856 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1857
1858 if (sm->Init)
1859 SM_ENTER(WPA_PTK, INITIALIZE);
1860 else if (sm->Disconnect
1861 /* || FIX: dot11RSNAConfigSALifetime timeout */)
1862 SM_ENTER(WPA_PTK, DISCONNECT);
1863 else if (sm->DeauthenticationRequest)
1864 SM_ENTER(WPA_PTK, DISCONNECTED);
1865 else if (sm->AuthenticationRequest)
1866 SM_ENTER(WPA_PTK, AUTHENTICATION);
1867 else if (sm->ReAuthenticationRequest)
1868 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1869 else if (sm->PTKRequest)
1870 SM_ENTER(WPA_PTK, PTKSTART);
1871 else switch (sm->wpa_ptk_state) {
1872 case WPA_PTK_INITIALIZE:
1873 break;
1874 case WPA_PTK_DISCONNECT:
1875 SM_ENTER(WPA_PTK, DISCONNECTED);
1876 break;
1877 case WPA_PTK_DISCONNECTED:
1878 SM_ENTER(WPA_PTK, INITIALIZE);
1879 break;
1880 case WPA_PTK_AUTHENTICATION:
1881 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1882 break;
1883 case WPA_PTK_AUTHENTICATION2:
56586197 1884 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1885 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1886 WPA_EAPOL_keyRun) > 0)
1887 SM_ENTER(WPA_PTK, INITPMK);
56586197 1888 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 1889 /* FIX: && 802.1X::keyRun */)
1890 SM_ENTER(WPA_PTK, INITPSK);
1891 break;
1892 case WPA_PTK_INITPMK:
1893 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1894 WPA_EAPOL_keyAvailable) > 0)
1895 SM_ENTER(WPA_PTK, PTKSTART);
1896 else {
1897 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1898 SM_ENTER(WPA_PTK, DISCONNECT);
1899 }
1900 break;
1901 case WPA_PTK_INITPSK:
1902 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1903 SM_ENTER(WPA_PTK, PTKSTART);
1904 else {
1905 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1906 "no PSK configured for the STA");
1907 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1908 SM_ENTER(WPA_PTK, DISCONNECT);
1909 }
1910 break;
1911 case WPA_PTK_PTKSTART:
1912 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1913 sm->EAPOLKeyPairwise)
1914 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1915 else if (sm->TimeoutCtr >
1916 (int) dot11RSNAConfigPairwiseUpdateCount) {
1917 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1918 SM_ENTER(WPA_PTK, DISCONNECT);
1919 } else if (sm->TimeoutEvt)
1920 SM_ENTER(WPA_PTK, PTKSTART);
1921 break;
1922 case WPA_PTK_PTKCALCNEGOTIATING:
1923 if (sm->MICVerified)
1924 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1925 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1926 sm->EAPOLKeyPairwise)
1927 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1928 else if (sm->TimeoutEvt)
1929 SM_ENTER(WPA_PTK, PTKSTART);
1930 break;
1931 case WPA_PTK_PTKCALCNEGOTIATING2:
1932 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1933 break;
1934 case WPA_PTK_PTKINITNEGOTIATING:
1935 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1936 sm->EAPOLKeyPairwise && sm->MICVerified)
1937 SM_ENTER(WPA_PTK, PTKINITDONE);
1938 else if (sm->TimeoutCtr >
1939 (int) dot11RSNAConfigPairwiseUpdateCount) {
1940 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1941 SM_ENTER(WPA_PTK, DISCONNECT);
1942 } else if (sm->TimeoutEvt)
1943 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1944 break;
1945 case WPA_PTK_PTKINITDONE:
1946 break;
1947 }
1948}
1949
1950
1951SM_STATE(WPA_PTK_GROUP, IDLE)
1952{
1953 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1954 if (sm->Init) {
1955 /* Init flag is not cleared here, so avoid busy
1956 * loop by claiming nothing changed. */
1957 sm->changed = FALSE;
1958 }
1959 sm->GTimeoutCtr = 0;
1960}
1961
1962
1963SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1964{
1965 u8 rsc[WPA_KEY_RSC_LEN];
1966 struct wpa_group *gsm = sm->group;
1967 u8 *kde, *pos, hdr[2];
1968 size_t kde_len;
1969
1970 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 1971
1972 sm->GTimeoutCtr++;
1973 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
1974 /* No point in sending the EAPOL-Key - we will disconnect
1975 * immediately following this. */
1976 return;
1977 }
1978
6fc6879b
JM		 1979 if (sm->wpa == WPA_VERSION_WPA)
1980 sm->PInitAKeys = FALSE;
1981 sm->TimeoutEvt = FALSE;
1982 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1983 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1984 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1985 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1986 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1987 "sending 1/2 msg of Group Key Handshake");
1988
1989 if (sm->wpa == WPA_VERSION_WPA2) {
1990 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1991 ieee80211w_kde_len(sm);
1992 kde = os_malloc(kde_len);
1993 if (kde == NULL)
1994 return;
1995
1996 pos = kde;
1997 hdr[0] = gsm->GN & 0x03;
1998 hdr[1] = 0;
1999 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2000 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2001 pos = ieee80211w_kde_add(sm, pos);
2002 } else {
2003 kde = gsm->GTK[gsm->GN - 1];
2004 pos = kde + gsm->GTK_len;
2005 }
2006
2007 wpa_send_eapol(sm->wpa_auth, sm,
2008 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2009 WPA_KEY_INFO_ACK |
2010 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2011 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
2012 if (sm->wpa == WPA_VERSION_WPA2)
2013 os_free(kde);
6fc6879b
JM		 2014}
2015
2016
2017SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2018{
2019 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2020 sm->EAPOLKeyReceived = FALSE;
2021 if (sm->GUpdateStationKeys)
2022 sm->group->GKeyDoneStations--;
2023 sm->GUpdateStationKeys = FALSE;
2024 sm->GTimeoutCtr = 0;
2025 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2026 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2027 "group key handshake completed (%s)",
2028 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2029 sm->has_GTK = TRUE;
2030}
2031
2032
2033SM_STATE(WPA_PTK_GROUP, KEYERROR)
2034{
2035 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2036 if (sm->GUpdateStationKeys)
2037 sm->group->GKeyDoneStations--;
2038 sm->GUpdateStationKeys = FALSE;
2039 sm->Disconnect = TRUE;
2040}
2041
2042
2043SM_STEP(WPA_PTK_GROUP)
2044{
9663596f 2045 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 2046 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 2047 sm->PtkGroupInit = FALSE;
2048 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 2049 case WPA_PTK_GROUP_IDLE:
2050 if (sm->GUpdateStationKeys ||
2051 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2052 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2053 break;
2054 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2055 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2056 !sm->EAPOLKeyPairwise && sm->MICVerified)
2057 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2058 else if (sm->GTimeoutCtr >
2059 (int) dot11RSNAConfigGroupUpdateCount)
2060 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2061 else if (sm->TimeoutEvt)
2062 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2063 break;
2064 case WPA_PTK_GROUP_KEYERROR:
2065 SM_ENTER(WPA_PTK_GROUP, IDLE);
2066 break;
2067 case WPA_PTK_GROUP_REKEYESTABLISHED:
2068 SM_ENTER(WPA_PTK_GROUP, IDLE);
2069 break;
2070 }
2071}
2072
2073
2074static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2075 struct wpa_group *group)
2076{
2077 int ret = 0;
2078
2079 /* FIX: is this the correct way of getting GNonce? */
2080 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2081 inc_byte_array(group->Counter, WPA_NONCE_LEN);
2082 wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
2083 group->GTK[group->GN - 1], group->GTK_len);
2084
2085#ifdef CONFIG_IEEE80211W
70f8cc8e 2086 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
6fc6879b
JM		 2087 if (os_get_random(group->IGTK[group->GN_igtk - 4],
2088 WPA_IGTK_LEN) < 0) {
2089 wpa_printf(MSG_INFO, "RSN: Failed to get new random "
2090 "IGTK");
2091 ret = -1;
2092 }
2093 wpa_hexdump_key(MSG_DEBUG, "IGTK",
2094 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
2095 }
2096#endif /* CONFIG_IEEE80211W */
2097
2098 return ret;
2099}
2100
2101
2102static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2103 struct wpa_group *group)
2104{
2105 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2106 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2107 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2108 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2109
2110 /* GTK[0..N] = 0 */
2111 os_memset(group->GTK, 0, sizeof(group->GTK));
2112 group->GN = 1;
2113 group->GM = 2;
2114#ifdef CONFIG_IEEE80211W
2115 group->GN_igtk = 4;
2116 group->GM_igtk = 5;
2117#endif /* CONFIG_IEEE80211W */
2118 /* GTK[GN] = CalcGTK() */
2119 wpa_gtk_update(wpa_auth, group);
2120}
2121
2122
2123static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2124{
2125 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2126 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2127 "Not in PTKINITDONE; skip Group Key update");
2128 return 0;
2129 }
9663596f
JM		 2130 if (sm->GUpdateStationKeys) {
2131 /*
2132 * This should not really happen, but just in case, make sure
2133 * we do not count the same STA twice in GKeyDoneStations.
2134 */
2135 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2136 "GUpdateStationKeys already set - do not "
2137 "increment GKeyDoneStations");
2138 } else {
2139 sm->group->GKeyDoneStations++;
2140 sm->GUpdateStationKeys = TRUE;
2141 }
6fc6879b
JM		 2142 wpa_sm_step(sm);
2143 return 0;
2144}
2145
2146
2147static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2148 struct wpa_group *group)
2149{
2150 int tmp;
2151
2152 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2153 "SETKEYS (VLAN-ID %d)", group->vlan_id);
2154 group->changed = TRUE;
2155 group->wpa_group_state = WPA_GROUP_SETKEYS;
2156 group->GTKReKey = FALSE;
2157 tmp = group->GM;
2158 group->GM = group->GN;
2159 group->GN = tmp;
2160#ifdef CONFIG_IEEE80211W
2161 tmp = group->GM_igtk;
2162 group->GM_igtk = group->GN_igtk;
2163 group->GN_igtk = tmp;
2164#endif /* CONFIG_IEEE80211W */
2165 /* "GKeyDoneStations = GNoStations" is done in more robust way by
2166 * counting the STAs that are marked with GUpdateStationKeys instead of
2167 * including all STAs that could be in not-yet-completed state. */
2168 wpa_gtk_update(wpa_auth, group);
2169
2170 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
2171 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2172 group->GKeyDoneStations);
2173}
2174
2175
2176static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2177 struct wpa_group *group)
2178{
2179 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2180 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2181 group->changed = TRUE;
2182 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2183 wpa_auth_set_key(wpa_auth, group->vlan_id,
89d39d9d 2184 wpa_alg_enum(wpa_auth->conf.wpa_group),
6fc6879b
JM		 2185 NULL, group->GN, group->GTK[group->GN - 1],
2186 group->GTK_len);
2187
2188#ifdef CONFIG_IEEE80211W
70f8cc8e 2189 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
89d39d9d 2190 wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK,
6fc6879b
JM		 2191 NULL, group->GN_igtk,
2192 group->IGTK[group->GN_igtk - 4],
2193 WPA_IGTK_LEN);
2194 }
2195#endif /* CONFIG_IEEE80211W */
2196}
2197
2198
2199static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2200 struct wpa_group *group)
2201{
2202 if (group->GInit) {
2203 wpa_group_gtk_init(wpa_auth, group);
2204 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2205 group->GTKAuthenticator) {
2206 wpa_group_setkeysdone(wpa_auth, group);
2207 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2208 group->GTKReKey) {
2209 wpa_group_setkeys(wpa_auth, group);
2210 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2211 if (group->GKeyDoneStations == 0)
2212 wpa_group_setkeysdone(wpa_auth, group);
2213 else if (group->GTKReKey)
2214 wpa_group_setkeys(wpa_auth, group);
2215 }
2216}
2217
2218
e4a6ea1d 2219static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 2220{
2221 if (sm == NULL)
e4a6ea1d 2222 return 0;
6fc6879b
JM		 2223
2224 if (sm->in_step_loop) {
2225 /* This should not happen, but if it does, make sure we do not
2226 * end up freeing the state machine too early by exiting the
2227 * recursive call. */
2228 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 2229 return 0;
6fc6879b
JM		 2230 }
2231
2232 sm->in_step_loop = 1;
2233 do {
2234 if (sm->pending_deinit)
2235 break;
2236
2237 sm->changed = FALSE;
2238 sm->wpa_auth->group->changed = FALSE;
2239
2240 SM_STEP_RUN(WPA_PTK);
2241 if (sm->pending_deinit)
2242 break;
2243 SM_STEP_RUN(WPA_PTK_GROUP);
2244 if (sm->pending_deinit)
2245 break;
2246 wpa_group_sm_step(sm->wpa_auth, sm->group);
2247 } while (sm->changed || sm->wpa_auth->group->changed);
2248 sm->in_step_loop = 0;
2249
2250 if (sm->pending_deinit) {
2251 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2252 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2253 wpa_free_sta_sm(sm);
e4a6ea1d 2254 return 1;
6fc6879b 2255 }
e4a6ea1d 2256 return 0;
6fc6879b
JM		 2257}
2258
2259
2260static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2261{
2262 struct wpa_state_machine *sm = eloop_ctx;
2263 wpa_sm_step(sm);
2264}
2265
2266
2267void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2268{
2269 if (sm == NULL)
2270 return;
2271 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2272}
2273
2274
2275void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2276{
2277 int tmp, i;
2278 struct wpa_group *group;
2279
2280 if (wpa_auth == NULL)
2281 return;
2282
2283 group = wpa_auth->group;
2284
2285 for (i = 0; i < 2; i++) {
2286 tmp = group->GM;
2287 group->GM = group->GN;
2288 group->GN = tmp;
2289#ifdef CONFIG_IEEE80211W
2290 tmp = group->GM_igtk;
2291 group->GM_igtk = group->GN_igtk;
2292 group->GN_igtk = tmp;
2293#endif /* CONFIG_IEEE80211W */
2294 wpa_gtk_update(wpa_auth, group);
2295 }
2296}
2297
2298
2299static const char * wpa_bool_txt(int bool)
2300{
2301 return bool ? "TRUE" : "FALSE";
2302}
2303
2304
2305static int wpa_cipher_bits(int cipher)
2306{
2307 switch (cipher) {
2308 case WPA_CIPHER_CCMP:
2309 return 128;
2310 case WPA_CIPHER_TKIP:
2311 return 256;
2312 case WPA_CIPHER_WEP104:
2313 return 104;
2314 case WPA_CIPHER_WEP40:
2315 return 40;
2316 default:
2317 return 0;
2318 }
2319}
2320
2321
2322#define RSN_SUITE "%02x-%02x-%02x-%d"
2323#define RSN_SUITE_ARG(s) \
2324((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2325
2326int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2327{
2328 int len = 0, ret;
2329 char pmkid_txt[PMKID_LEN * 2 + 1];
2330
2331 if (wpa_auth == NULL)
2332 return len;
2333
2334 ret = os_snprintf(buf + len, buflen - len,
2335 "dot11RSNAOptionImplemented=TRUE\n"
2336#ifdef CONFIG_RSN_PREAUTH
2337 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2338#else /* CONFIG_RSN_PREAUTH */
2339 "dot11RSNAPreauthenticationImplemented=FALSE\n"
2340#endif /* CONFIG_RSN_PREAUTH */
2341 "dot11RSNAEnabled=%s\n"
2342 "dot11RSNAPreauthenticationEnabled=%s\n",
2343 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2344 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2345 if (ret < 0 || (size_t) ret >= buflen - len)
2346 return len;
2347 len += ret;
2348
2349 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2350 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2351
2352 ret = os_snprintf(
2353 buf + len, buflen - len,
2354 "dot11RSNAConfigVersion=%u\n"
2355 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2356 /* FIX: dot11RSNAConfigGroupCipher */
2357 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2358 /* FIX: dot11RSNAConfigGroupRekeyTime */
2359 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2360 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2361 "dot11RSNAConfigGroupUpdateCount=%u\n"
2362 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2363 "dot11RSNAConfigGroupCipherSize=%u\n"
2364 "dot11RSNAConfigPMKLifetime=%u\n"
2365 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2366 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2367 "dot11RSNAConfigSATimeout=%u\n"
2368 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2369 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2370 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2371 "dot11RSNAPMKIDUsed=%s\n"
2372 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2373 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2374 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2375 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2376 "dot11RSNA4WayHandshakeFailures=%u\n"
2377 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2378 RSN_VERSION,
2379 !!wpa_auth->conf.wpa_strict_rekey,
2380 dot11RSNAConfigGroupUpdateCount,
2381 dot11RSNAConfigPairwiseUpdateCount,
2382 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2383 dot11RSNAConfigPMKLifetime,
2384 dot11RSNAConfigPMKReauthThreshold,
2385 dot11RSNAConfigSATimeout,
2386 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2387 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2388 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2389 pmkid_txt,
2390 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2391 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2392 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2393 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2394 wpa_auth->dot11RSNA4WayHandshakeFailures);
2395 if (ret < 0 || (size_t) ret >= buflen - len)
2396 return len;
2397 len += ret;
2398
2399 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2400 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2401
2402 /* Private MIB */
2403 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2404 wpa_auth->group->wpa_group_state);
2405 if (ret < 0 || (size_t) ret >= buflen - len)
2406 return len;
2407 len += ret;
2408
2409 return len;
2410}
2411
2412
2413int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2414{
2415 int len = 0, ret;
2416 u32 pairwise = 0;
2417
2418 if (sm == NULL)
2419 return 0;
2420
2421 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2422
2423 /* dot11RSNAStatsEntry */
2424
2425 if (sm->wpa == WPA_VERSION_WPA) {
2426 if (sm->pairwise == WPA_CIPHER_CCMP)
2427 pairwise = WPA_CIPHER_SUITE_CCMP;
2428 else if (sm->pairwise == WPA_CIPHER_TKIP)
2429 pairwise = WPA_CIPHER_SUITE_TKIP;
2430 else if (sm->pairwise == WPA_CIPHER_WEP104)
2431 pairwise = WPA_CIPHER_SUITE_WEP104;
2432 else if (sm->pairwise == WPA_CIPHER_WEP40)
2433 pairwise = WPA_CIPHER_SUITE_WEP40;
2434 else if (sm->pairwise == WPA_CIPHER_NONE)
2435 pairwise = WPA_CIPHER_SUITE_NONE;
2436 } else if (sm->wpa == WPA_VERSION_WPA2) {
2437 if (sm->pairwise == WPA_CIPHER_CCMP)
2438 pairwise = RSN_CIPHER_SUITE_CCMP;
2439 else if (sm->pairwise == WPA_CIPHER_TKIP)
2440 pairwise = RSN_CIPHER_SUITE_TKIP;
2441 else if (sm->pairwise == WPA_CIPHER_WEP104)
2442 pairwise = RSN_CIPHER_SUITE_WEP104;
2443 else if (sm->pairwise == WPA_CIPHER_WEP40)
2444 pairwise = RSN_CIPHER_SUITE_WEP40;
2445 else if (sm->pairwise == WPA_CIPHER_NONE)
2446 pairwise = RSN_CIPHER_SUITE_NONE;
2447 } else
2448 return 0;
2449
2450 ret = os_snprintf(
2451 buf + len, buflen - len,
2452 /* TODO: dot11RSNAStatsIndex */
2453 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2454 "dot11RSNAStatsVersion=1\n"
2455 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2456 /* TODO: dot11RSNAStatsTKIPICVErrors */
2457 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2458 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2459 /* TODO: dot11RSNAStatsCCMPReplays */
2460 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2461 /* TODO: dot11RSNAStatsTKIPReplays */,
2462 MAC2STR(sm->addr),
2463 RSN_SUITE_ARG(pairwise),
2464 sm->dot11RSNAStatsTKIPLocalMICFailures,
2465 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2466 if (ret < 0 || (size_t) ret >= buflen - len)
2467 return len;
2468 len += ret;
2469
2470 /* Private MIB */
2471 ret = os_snprintf(buf + len, buflen - len,
2472 "hostapdWPAPTKState=%d\n"
2473 "hostapdWPAPTKGroupState=%d\n",
2474 sm->wpa_ptk_state,
2475 sm->wpa_ptk_group_state);
2476 if (ret < 0 || (size_t) ret >= buflen - len)
2477 return len;
2478 len += ret;
2479
2480 return len;
2481}
2482
2483
2484void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2485{
2486 if (wpa_auth)
2487 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2488}
2489
2490
2491int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2492{
2493 return sm && sm->pairwise_set;
2494}
2495
2496
ff36ff00
JM		 2497int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2498{
2499 return sm->pairwise;
2500}
2501
2502
6fc6879b
JM		 2503int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2504{
2505 if (sm == NULL)
2506 return -1;
2507 return sm->wpa_key_mgmt;
2508}
2509
2510
2511int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2512{
2513 if (sm == NULL)
2514 return 0;
2515 return sm->wpa;
2516}
2517
2518
2519int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2520 struct rsn_pmksa_cache_entry *entry)
2521{
2522 if (sm == NULL || sm->pmksa != entry)
2523 return -1;
2524 sm->pmksa = NULL;
2525 return 0;
2526}
2527
2528
2529struct rsn_pmksa_cache_entry *
2530wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2531{
2532 return sm ? sm->pmksa : NULL;
2533}
2534
2535
2536void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2537{
2538 if (sm)
2539 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2540}
2541
2542
2543const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2544{
2545 if (wpa_auth == NULL)
2546 return NULL;
2547 *len = wpa_auth->wpa_ie_len;
2548 return wpa_auth->wpa_ie;
2549}
2550
2551
2552int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2553 int session_timeout, struct eapol_state_machine *eapol)
2554{
2555 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2556 return -1;
2557
4bb081f1
JM		 2558 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2559 sm->wpa_auth->addr, sm->addr, session_timeout,
2560 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 2561 return 0;
2562
2563 return -1;
2564}
2565
2566
2567int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2568 const u8 *pmk, size_t len, const u8 *sta_addr,
2569 int session_timeout,
2570 struct eapol_state_machine *eapol)
2571{
2572 if (wpa_auth == NULL)
2573 return -1;
2574
4bb081f1
JM		 2575 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2576 sta_addr, session_timeout, eapol,
2577 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 2578 return 0;
2579
2580 return -1;
2581}
2582
2583
2584static struct wpa_group *
2585wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2586{
2587 struct wpa_group *group;
2588
2589 if (wpa_auth == NULL || wpa_auth->group == NULL)
2590 return NULL;
2591
2592 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2593 vlan_id);
2594 group = wpa_group_init(wpa_auth, vlan_id);
2595 if (group == NULL)
2596 return NULL;
2597
2598 group->next = wpa_auth->group->next;
2599 wpa_auth->group->next = group;
2600
2601 return group;
2602}
2603
2604
2605int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2606{
2607 struct wpa_group *group;
2608
2609 if (sm == NULL || sm->wpa_auth == NULL)
2610 return 0;
2611
2612 group = sm->wpa_auth->group;
2613 while (group) {
2614 if (group->vlan_id == vlan_id)
2615 break;
2616 group = group->next;
2617 }
2618
2619 if (group == NULL) {
2620 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2621 if (group == NULL)
2622 return -1;
2623 }
2624
2625 if (sm->group == group)
2626 return 0;
2627
2628 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2629 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2630
2631 sm->group = group;
2632 return 0;
2633}
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