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Move Michael MIC error report processing into separate function
[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"
3642c431 25#include "crypto/random.h"
281c950b 26#include "eapol_auth/eapol_auth_sm.h"
6226e38d 27#include "ap_config.h"
6fc6879b 28#include "ieee802_11.h"
6226e38d
JM		 29#include "wpa_auth.h"
30#include "pmksa_cache_auth.h"
6fc6879b
JM		 31#include "wpa_auth_i.h"
32#include "wpa_auth_ie.h"
33
34#define STATE_MACHINE_DATA struct wpa_state_machine
35#define STATE_MACHINE_DEBUG_PREFIX "WPA"
36#define STATE_MACHINE_ADDR sm->addr
37
38
39static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 40static int wpa_sm_step(struct wpa_state_machine *sm);
6fc6879b
JM		 41static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
42static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
43static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
44 struct wpa_group *group);
581a8cde 45static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 46static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
47 struct wpa_group *group);
1bdb7ab3
JM		 48static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
49 struct wpa_group *group);
6fc6879b 50
bae61562
JM		 51static const u32 dot11RSNAConfigGroupUpdateCount = 4;
52static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
53static const u32 eapol_key_timeout_first = 100; /* ms */
54static const u32 eapol_key_timeout_subseq = 1000; /* ms */
6fc6879b
JM		 55
56/* TODO: make these configurable */
57static const int dot11RSNAConfigPMKLifetime = 43200;
58static const int dot11RSNAConfigPMKReauthThreshold = 70;
59static const int dot11RSNAConfigSATimeout = 60;
60
61
62static inline void wpa_auth_mic_failure_report(
63 struct wpa_authenticator *wpa_auth, const u8 *addr)
64{
65 if (wpa_auth->cb.mic_failure_report)
66 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
67}
68
69
70static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
71 const u8 *addr, wpa_eapol_variable var,
72 int value)
73{
74 if (wpa_auth->cb.set_eapol)
75 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
76}
77
78
79static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
80 const u8 *addr, wpa_eapol_variable var)
81{
82 if (wpa_auth->cb.get_eapol == NULL)
83 return -1;
84 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
85}
86
87
88static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
89 const u8 *addr, const u8 *prev_psk)
90{
91 if (wpa_auth->cb.get_psk == NULL)
92 return NULL;
93 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
94}
95
96
97static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
98 const u8 *addr, u8 *msk, size_t *len)
99{
100 if (wpa_auth->cb.get_msk == NULL)
101 return -1;
102 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
103}
104
105
106static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
107 int vlan_id,
71934751 108 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 109 u8 *key, size_t key_len)
110{
111 if (wpa_auth->cb.set_key == NULL)
112 return -1;
113 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
114 key, key_len);
115}
116
117
118static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
119 const u8 *addr, int idx, u8 *seq)
120{
121 if (wpa_auth->cb.get_seqnum == NULL)
122 return -1;
123 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
124}
125
126
6fc6879b
JM		 127static inline int
128wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
129 const u8 *data, size_t data_len, int encrypt)
130{
131 if (wpa_auth->cb.send_eapol == NULL)
132 return -1;
133 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
134 encrypt);
135}
136
137
138int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
139 int (*cb)(struct wpa_state_machine *sm, void *ctx),
140 void *cb_ctx)
141{
142 if (wpa_auth->cb.for_each_sta == NULL)
143 return 0;
144 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
145}
146
147
bf98f7f3
JM		 148int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
149 int (*cb)(struct wpa_authenticator *a, void *ctx),
150 void *cb_ctx)
151{
152 if (wpa_auth->cb.for_each_auth == NULL)
153 return 0;
154 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
155}
156
157
6fc6879b
JM		 158void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
159 logger_level level, const char *txt)
160{
161 if (wpa_auth->cb.logger == NULL)
162 return;
163 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
164}
165
166
167void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
168 logger_level level, const char *fmt, ...)
169{
170 char *format;
171 int maxlen;
172 va_list ap;
173
174 if (wpa_auth->cb.logger == NULL)
175 return;
176
177 maxlen = os_strlen(fmt) + 100;
178 format = os_malloc(maxlen);
179 if (!format)
180 return;
181
182 va_start(ap, fmt);
183 vsnprintf(format, maxlen, fmt, ap);
184 va_end(ap);
185
186 wpa_auth_logger(wpa_auth, addr, level, format);
187
188 os_free(format);
189}
190
191
192static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
193 const u8 *addr)
194{
195 if (wpa_auth->cb.disconnect == NULL)
196 return;
197 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
198 WLAN_REASON_PREV_AUTH_NOT_VALID);
199}
200
201
202static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
203{
56586197 204 int ret = 0;
6fc6879b 205#ifdef CONFIG_IEEE80211R
56586197
JM		 206 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
207 ret = 1;
6fc6879b 208#endif /* CONFIG_IEEE80211R */
56586197
JM		 209#ifdef CONFIG_IEEE80211W
210 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
211 ret = 1;
212#endif /* CONFIG_IEEE80211W */
213 return ret;
6fc6879b
JM		 214}
215
216
217static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
218{
219 struct wpa_authenticator *wpa_auth = eloop_ctx;
220
3642c431 221 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 222 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
223 "initialization.");
224 } else {
225 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 226 wpa_hexdump_key(MSG_DEBUG, "GMK",
227 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 228 }
229
230 if (wpa_auth->conf.wpa_gmk_rekey) {
231 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
232 wpa_rekey_gmk, wpa_auth, NULL);
233 }
234}
235
236
237static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
238{
239 struct wpa_authenticator *wpa_auth = eloop_ctx;
240 struct wpa_group *group;
241
242 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
243 for (group = wpa_auth->group; group; group = group->next) {
244 group->GTKReKey = TRUE;
245 do {
246 group->changed = FALSE;
247 wpa_group_sm_step(wpa_auth, group);
248 } while (group->changed);
249 }
250
251 if (wpa_auth->conf.wpa_group_rekey) {
252 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
253 0, wpa_rekey_gtk, wpa_auth, NULL);
254 }
255}
256
257
581a8cde
JM		 258static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
259{
260 struct wpa_authenticator *wpa_auth = eloop_ctx;
261 struct wpa_state_machine *sm = timeout_ctx;
262
263 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
264 wpa_request_new_ptk(sm);
265 wpa_sm_step(sm);
266}
267
268
6fc6879b
JM		 269static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
270{
271 if (sm->pmksa == ctx)
272 sm->pmksa = NULL;
273 return 0;
274}
275
276
277static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
278 void *ctx)
279{
280 struct wpa_authenticator *wpa_auth = ctx;
281 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
282}
283
284
e6965d4e 285static void wpa_group_set_key_len(struct wpa_group *group, int cipher)
6fc6879b 286{
e6965d4e 287 switch (cipher) {
6fc6879b
JM		 288 case WPA_CIPHER_CCMP:
289 group->GTK_len = 16;
290 break;
291 case WPA_CIPHER_TKIP:
292 group->GTK_len = 32;
293 break;
294 case WPA_CIPHER_WEP104:
295 group->GTK_len = 13;
296 break;
297 case WPA_CIPHER_WEP40:
298 group->GTK_len = 5;
299 break;
300 }
e6965d4e
JM		 301}
302
303
1bdb7ab3
JM		 304static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
305 struct wpa_group *group)
306{
307 u8 buf[ETH_ALEN + 8 + sizeof(group)];
308 u8 rkey[32];
309
3642c431 310 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 311 return -1;
312 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
313
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));
3642c431 321 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 322 return -1;
323
324 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
325 group->Counter, WPA_NONCE_LEN) < 0)
326 return -1;
327 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
328 group->Counter, WPA_NONCE_LEN);
329
330 return 0;
331}
332
333
e6965d4e 334static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 335 int vlan_id, int delay_init)
e6965d4e
JM		 336{
337 struct wpa_group *group;
e6965d4e
JM		 338
339 group = os_zalloc(sizeof(struct wpa_group));
340 if (group == NULL)
341 return NULL;
342
343 group->GTKAuthenticator = TRUE;
344 group->vlan_id = vlan_id;
345
346 wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
6fc6879b 347
08704cd8
JM		 348 if (random_pool_ready() != 1) {
349 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
350 "for secure operations - update keys later when "
351 "the first station connects");
352 }
353
1bdb7ab3
JM		 354 /*
355 * Set initial GMK/Counter value here. The actual values that will be
356 * used in negotiations will be set once the first station tries to
357 * connect. This allows more time for collecting additional randomness
358 * on embedded devices.
6fc6879b 359 */
1bdb7ab3 360 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 361 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
362 "initialization.");
363 os_free(group);
364 return NULL;
365 }
6fc6879b
JM		 366
367 group->GInit = TRUE;
bdffdc5d
JM		 368 if (delay_init) {
369 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
370 "until Beacon frames have been configured");
371 /* Initialization is completed in wpa_init_keys(). */
372 } else {
373 wpa_group_sm_step(wpa_auth, group);
374 group->GInit = FALSE;
375 wpa_group_sm_step(wpa_auth, group);
376 }
6fc6879b
JM		 377
378 return group;
379}
380
381
382/**
383 * wpa_init - Initialize WPA authenticator
384 * @addr: Authenticator address
385 * @conf: Configuration for WPA authenticator
a17df5fb 386 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 387 * Returns: Pointer to WPA authenticator data or %NULL on failure
388 */
389struct wpa_authenticator * wpa_init(const u8 *addr,
390 struct wpa_auth_config *conf,
391 struct wpa_auth_callbacks *cb)
392{
393 struct wpa_authenticator *wpa_auth;
394
395 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
396 if (wpa_auth == NULL)
397 return NULL;
398 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
399 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
400 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
401
402 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
403 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
404 os_free(wpa_auth);
405 return NULL;
406 }
407
bdffdc5d 408 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 409 if (wpa_auth->group == NULL) {
410 os_free(wpa_auth->wpa_ie);
411 os_free(wpa_auth);
412 return NULL;
413 }
414
4bb081f1
JM		 415 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
416 wpa_auth);
6fc6879b
JM		 417 if (wpa_auth->pmksa == NULL) {
418 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
419 os_free(wpa_auth->wpa_ie);
420 os_free(wpa_auth);
421 return NULL;
422 }
423
424#ifdef CONFIG_IEEE80211R
425 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
426 if (wpa_auth->ft_pmk_cache == NULL) {
427 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
428 os_free(wpa_auth->wpa_ie);
4bb081f1 429 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 430 os_free(wpa_auth);
431 return NULL;
432 }
433#endif /* CONFIG_IEEE80211R */
434
435 if (wpa_auth->conf.wpa_gmk_rekey) {
436 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
437 wpa_rekey_gmk, wpa_auth, NULL);
438 }
439
440 if (wpa_auth->conf.wpa_group_rekey) {
441 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
442 wpa_rekey_gtk, wpa_auth, NULL);
443 }
444
445 return wpa_auth;
446}
447
448
bdffdc5d
JM		 449int wpa_init_keys(struct wpa_authenticator *wpa_auth)
450{
451 struct wpa_group *group = wpa_auth->group;
452
453 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
454 "keys");
455 wpa_group_sm_step(wpa_auth, group);
456 group->GInit = FALSE;
457 wpa_group_sm_step(wpa_auth, group);
458 return 0;
459}
460
461
6fc6879b
JM		 462/**
463 * wpa_deinit - Deinitialize WPA authenticator
464 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
465 */
466void wpa_deinit(struct wpa_authenticator *wpa_auth)
467{
468 struct wpa_group *group, *prev;
469
470 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
471 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
472
473#ifdef CONFIG_PEERKEY
474 while (wpa_auth->stsl_negotiations)
475 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
476#endif /* CONFIG_PEERKEY */
477
4bb081f1 478 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 479
480#ifdef CONFIG_IEEE80211R
481 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
482 wpa_auth->ft_pmk_cache = NULL;
483#endif /* CONFIG_IEEE80211R */
484
485 os_free(wpa_auth->wpa_ie);
486
487 group = wpa_auth->group;
488 while (group) {
489 prev = group;
490 group = group->next;
491 os_free(prev);
492 }
493
494 os_free(wpa_auth);
495}
496
497
498/**
499 * wpa_reconfig - Update WPA authenticator configuration
500 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
501 * @conf: Configuration for WPA authenticator
502 */
503int wpa_reconfig(struct wpa_authenticator *wpa_auth,
504 struct wpa_auth_config *conf)
505{
e6965d4e 506 struct wpa_group *group;
6fc6879b
JM		 507 if (wpa_auth == NULL)
508 return 0;
509
510 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 511 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
512 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
513 return -1;
514 }
515
e6965d4e
JM		 516 /*
517 * Reinitialize GTK to make sure it is suitable for the new
518 * configuration.
519 */
520 group = wpa_auth->group;
521 wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
522 group->GInit = TRUE;
523 wpa_group_sm_step(wpa_auth, group);
524 group->GInit = FALSE;
525 wpa_group_sm_step(wpa_auth, group);
526
6fc6879b
JM		 527 return 0;
528}
529
530
531struct wpa_state_machine *
532wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
533{
534 struct wpa_state_machine *sm;
535
536 sm = os_zalloc(sizeof(struct wpa_state_machine));
537 if (sm == NULL)
538 return NULL;
539 os_memcpy(sm->addr, addr, ETH_ALEN);
540
541 sm->wpa_auth = wpa_auth;
542 sm->group = wpa_auth->group;
543
544 return sm;
545}
546
547
6f9b5d16
JM		 548int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
549 struct wpa_state_machine *sm)
6fc6879b
JM		 550{
551 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 552 return -1;
6fc6879b
JM		 553
554#ifdef CONFIG_IEEE80211R
555 if (sm->ft_completed) {
556 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
557 "FT authentication already completed - do not "
558 "start 4-way handshake");
6f9b5d16 559 return 0;
6fc6879b
JM		 560 }
561#endif /* CONFIG_IEEE80211R */
562
563 if (sm->started) {
22a299ee 564 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 565 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 566 return wpa_sm_step(sm);
6fc6879b
JM		 567 }
568
569 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
570 "start authentication");
571 sm->started = 1;
572
573 sm->Init = TRUE;
e4a6ea1d 574 if (wpa_sm_step(sm) == 1)
6f9b5d16 575 return 1; /* should not really happen */
6fc6879b
JM		 576 sm->Init = FALSE;
577 sm->AuthenticationRequest = TRUE;
6f9b5d16 578 return wpa_sm_step(sm);
6fc6879b
JM		 579}
580
581
a8d05fca
JM		 582void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
583{
584 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
585 * reassociates back to the same AP while the previous entry for the
586 * STA has not yet been removed. */
587 if (sm == NULL)
588 return;
589
590 sm->wpa_key_mgmt = 0;
591}
592
593
6fc6879b
JM		 594static void wpa_free_sta_sm(struct wpa_state_machine *sm)
595{
2ade8ef2
JM		 596 if (sm->GUpdateStationKeys) {
597 sm->group->GKeyDoneStations--;
598 sm->GUpdateStationKeys = FALSE;
599 }
0f857f43
JM		 600#ifdef CONFIG_IEEE80211R
601 os_free(sm->assoc_resp_ftie);
602#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 603 os_free(sm->last_rx_eapol_key);
604 os_free(sm->wpa_ie);
605 os_free(sm);
606}
607
608
609void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
610{
611 if (sm == NULL)
612 return;
613
614 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
615 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
616 "strict rekeying - force GTK rekey since STA "
617 "is leaving");
618 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
619 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
620 NULL);
621 }
622
623 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 624 sm->pending_1_of_4_timeout = 0;
6fc6879b 625 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 626 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 627 if (sm->in_step_loop) {
628 /* Must not free state machine while wpa_sm_step() is running.
629 * Freeing will be completed in the end of wpa_sm_step(). */
630 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
631 "machine deinit for " MACSTR, MAC2STR(sm->addr));
632 sm->pending_deinit = 1;
633 } else
634 wpa_free_sta_sm(sm);
635}
636
637
638static void wpa_request_new_ptk(struct wpa_state_machine *sm)
639{
640 if (sm == NULL)
641 return;
642
643 sm->PTKRequest = TRUE;
644 sm->PTK_valid = 0;
645}
646
647
22a299ee
JM		 648static int wpa_replay_counter_valid(struct wpa_state_machine *sm,
649 const u8 *replay_counter)
650{
651 int i;
652 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
653 if (!sm->key_replay[i].valid)
654 break;
655 if (os_memcmp(replay_counter, sm->key_replay[i].counter,
656 WPA_REPLAY_COUNTER_LEN) == 0)
657 return 1;
658 }
659 return 0;
660}
661
662
0f857f43
JM		 663#ifdef CONFIG_IEEE80211R
664static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
665 struct wpa_state_machine *sm,
666 struct wpa_eapol_ie_parse *kde)
667{
668 struct wpa_ie_data ie;
669 struct rsn_mdie *mdie;
670
671 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
672 ie.num_pmkid != 1 || ie.pmkid == NULL) {
673 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
674 "FT 4-way handshake message 2/4");
675 return -1;
676 }
677
678 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
679 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
680 sm->sup_pmk_r1_name, PMKID_LEN);
681
682 if (!kde->mdie || !kde->ftie) {
683 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
684 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
685 return -1;
686 }
687
688 mdie = (struct rsn_mdie *) (kde->mdie + 2);
689 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
690 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
691 MOBILITY_DOMAIN_ID_LEN) != 0) {
692 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
693 return -1;
694 }
695
696 if (sm->assoc_resp_ftie &&
697 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
698 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
699 2 + sm->assoc_resp_ftie[1]) != 0)) {
700 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
701 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
702 kde->ftie, kde->ftie_len);
703 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
704 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
705 return -1;
706 }
707
708 return 0;
709}
710#endif /* CONFIG_IEEE80211R */
711
712
ec027805
JM		 713static void wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
714 struct wpa_state_machine *sm, int group)
715{
716 /* Supplicant reported a Michael MIC error */
717 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
718 "received EAPOL-Key Error Request "
719 "(STA detected Michael MIC failure (group=%d))",
720 group);
721 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
722 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
723 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
724
725 /*
726 * Error report is not a request for a new key handshake, but since
727 * Authenticator may do it, let's change the keys now anyway.
728 */
729 wpa_request_new_ptk(sm);
730}
731
732
6fc6879b
JM		 733void wpa_receive(struct wpa_authenticator *wpa_auth,
734 struct wpa_state_machine *sm,
735 u8 *data, size_t data_len)
736{
737 struct ieee802_1x_hdr *hdr;
738 struct wpa_eapol_key *key;
739 u16 key_info, key_data_length;
740 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
741 SMK_M1, SMK_M3, SMK_ERROR } msg;
742 char *msgtxt;
743 struct wpa_eapol_ie_parse kde;
26e23750 744 int ft;
1566ec46
JM		 745 const u8 *eapol_key_ie;
746 size_t eapol_key_ie_len;
6fc6879b
JM		 747
748 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
749 return;
750
751 if (data_len < sizeof(*hdr) + sizeof(*key))
752 return;
753
754 hdr = (struct ieee802_1x_hdr *) data;
755 key = (struct wpa_eapol_key *) (hdr + 1);
756 key_info = WPA_GET_BE16(key->key_info);
757 key_data_length = WPA_GET_BE16(key->key_data_length);
758 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
759 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
760 "key_data overflow (%d > %lu)",
761 key_data_length,
762 (unsigned long) (data_len - sizeof(*hdr) -
763 sizeof(*key)));
764 return;
765 }
766
f8e96eb6
JM		 767 if (sm->wpa == WPA_VERSION_WPA2) {
768 if (key->type != EAPOL_KEY_TYPE_RSN) {
769 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
770 "unexpected type %d in RSN mode",
771 key->type);
772 return;
773 }
774 } else {
775 if (key->type != EAPOL_KEY_TYPE_WPA) {
776 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
777 "unexpected type %d in WPA mode",
778 key->type);
779 return;
780 }
781 }
782
bc8318ac
JM		 783 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
784 WPA_NONCE_LEN);
785 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
786 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
787
6fc6879b
JM		 788 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
789 * are set */
790
791 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
792 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
793 if (key_info & WPA_KEY_INFO_ERROR) {
794 msg = SMK_ERROR;
795 msgtxt = "SMK Error";
796 } else {
797 msg = SMK_M1;
798 msgtxt = "SMK M1";
799 }
800 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
801 msg = SMK_M3;
802 msgtxt = "SMK M3";
803 } else if (key_info & WPA_KEY_INFO_REQUEST) {
804 msg = REQUEST;
805 msgtxt = "Request";
806 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
807 msg = GROUP_2;
808 msgtxt = "2/2 Group";
809 } else if (key_data_length == 0) {
810 msg = PAIRWISE_4;
811 msgtxt = "4/4 Pairwise";
812 } else {
813 msg = PAIRWISE_2;
814 msgtxt = "2/4 Pairwise";
815 }
816
817 /* TODO: key_info type validation for PeerKey */
818 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
819 msg == GROUP_2) {
820 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
821 if (sm->pairwise == WPA_CIPHER_CCMP) {
822 if (wpa_use_aes_cmac(sm) &&
823 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
824 wpa_auth_logger(wpa_auth, sm->addr,
825 LOGGER_WARNING,
826 "advertised support for "
827 "AES-128-CMAC, but did not "
828 "use it");
829 return;
830 }
831
832 if (!wpa_use_aes_cmac(sm) &&
833 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
834 wpa_auth_logger(wpa_auth, sm->addr,
835 LOGGER_WARNING,
836 "did not use HMAC-SHA1-AES "
837 "with CCMP");
838 return;
839 }
840 }
841 }
842
843 if (key_info & WPA_KEY_INFO_REQUEST) {
844 if (sm->req_replay_counter_used &&
845 os_memcmp(key->replay_counter, sm->req_replay_counter,
846 WPA_REPLAY_COUNTER_LEN) <= 0) {
847 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
848 "received EAPOL-Key request with "
849 "replayed counter");
850 return;
851 }
852 }
853
854 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
22a299ee
JM		 855 !wpa_replay_counter_valid(sm, key->replay_counter)) {
856 int i;
6fc6879b
JM		 857 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
858 "received EAPOL-Key %s with unexpected "
859 "replay counter", msgtxt);
22a299ee
JM		 860 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
861 if (!sm->key_replay[i].valid)
862 break;
863 wpa_hexdump(MSG_DEBUG, "pending replay counter",
864 sm->key_replay[i].counter,
865 WPA_REPLAY_COUNTER_LEN);
866 }
6fc6879b
JM		 867 wpa_hexdump(MSG_DEBUG, "received replay counter",
868 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
869 return;
870 }
871
872 switch (msg) {
873 case PAIRWISE_2:
874 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
875 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
876 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
877 "received EAPOL-Key msg 2/4 in "
878 "invalid state (%d) - dropped",
879 sm->wpa_ptk_state);
880 return;
881 }
bbb921da 882 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 883 if (sm->group->reject_4way_hs_for_entropy) {
884 /*
885 * The system did not have enough entropy to generate
886 * strong random numbers. Reject the first 4-way
887 * handshake(s) and collect some entropy based on the
888 * information from it. Once enough entropy is
889 * available, the next atempt will trigger GMK/Key
890 * Counter update and the station will be allowed to
891 * continue.
892 */
893 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
894 "collect more entropy for random number "
895 "generation");
896 sm->group->reject_4way_hs_for_entropy = FALSE;
897 random_mark_pool_ready();
898 sm->group->first_sta_seen = FALSE;
899 wpa_sta_disconnect(wpa_auth, sm->addr);
900 return;
901 }
1566ec46
JM		 902 if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length,
903 &kde) < 0) {
904 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
905 "received EAPOL-Key msg 2/4 with "
906 "invalid Key Data contents");
907 return;
908 }
909 if (kde.rsn_ie) {
910 eapol_key_ie = kde.rsn_ie;
911 eapol_key_ie_len = kde.rsn_ie_len;
912 } else {
913 eapol_key_ie = kde.wpa_ie;
914 eapol_key_ie_len = kde.wpa_ie_len;
915 }
26e23750
JM		 916 ft = sm->wpa == WPA_VERSION_WPA2 &&
917 wpa_key_mgmt_ft(sm->wpa_key_mgmt);
6fc6879b 918 if (sm->wpa_ie == NULL ||
26e23750
JM		 919 wpa_compare_rsn_ie(ft,
920 sm->wpa_ie, sm->wpa_ie_len,
1566ec46 921 eapol_key_ie, eapol_key_ie_len)) {
6fc6879b
JM		 922 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
923 "WPA IE from (Re)AssocReq did not "
924 "match with msg 2/4");
925 if (sm->wpa_ie) {
926 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
927 sm->wpa_ie, sm->wpa_ie_len);
928 }
929 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1566ec46 930 eapol_key_ie, eapol_key_ie_len);
6fc6879b
JM		 931 /* MLME-DEAUTHENTICATE.request */
932 wpa_sta_disconnect(wpa_auth, sm->addr);
933 return;
934 }
26e23750 935#ifdef CONFIG_IEEE80211R
0f857f43
JM		 936 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
937 wpa_sta_disconnect(wpa_auth, sm->addr);
938 return;
26e23750
JM		 939 }
940#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 941 break;
942 case PAIRWISE_4:
943 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
944 !sm->PTK_valid) {
945 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
946 "received EAPOL-Key msg 4/4 in "
947 "invalid state (%d) - dropped",
948 sm->wpa_ptk_state);
949 return;
950 }
951 break;
952 case GROUP_2:
953 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
954 || !sm->PTK_valid) {
955 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
956 "received EAPOL-Key msg 2/2 in "
957 "invalid state (%d) - dropped",
958 sm->wpa_ptk_group_state);
959 return;
960 }
961 break;
962#ifdef CONFIG_PEERKEY
963 case SMK_M1:
964 case SMK_M3:
965 case SMK_ERROR:
966 if (!wpa_auth->conf.peerkey) {
967 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
968 "PeerKey use disabled - ignoring message");
969 return;
970 }
971 if (!sm->PTK_valid) {
972 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
973 "received EAPOL-Key msg SMK in "
974 "invalid state - dropped");
975 return;
976 }
977 break;
978#else /* CONFIG_PEERKEY */
979 case SMK_M1:
980 case SMK_M3:
981 case SMK_ERROR:
982 return; /* STSL disabled - ignore SMK messages */
983#endif /* CONFIG_PEERKEY */
984 case REQUEST:
985 break;
986 }
987
988 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
989 "received EAPOL-Key frame (%s)", msgtxt);
990
991 if (key_info & WPA_KEY_INFO_ACK) {
992 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
993 "received invalid EAPOL-Key: Key Ack set");
994 return;
995 }
996
997 if (!(key_info & WPA_KEY_INFO_MIC)) {
998 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
999 "received invalid EAPOL-Key: Key MIC not set");
1000 return;
1001 }
1002
1003 sm->MICVerified = FALSE;
1004 if (sm->PTK_valid) {
1005 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
1006 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1007 "received EAPOL-Key with invalid MIC");
1008 return;
1009 }
1010 sm->MICVerified = TRUE;
1011 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1012 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1013 }
1014
1015 if (key_info & WPA_KEY_INFO_REQUEST) {
1016 if (sm->MICVerified) {
1017 sm->req_replay_counter_used = 1;
1018 os_memcpy(sm->req_replay_counter, key->replay_counter,
1019 WPA_REPLAY_COUNTER_LEN);
1020 } else {
1021 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1022 "received EAPOL-Key request with "
1023 "invalid MIC");
1024 return;
1025 }
1026
1027 /*
1028 * TODO: should decrypt key data field if encryption was used;
1029 * even though MAC address KDE is not normally encrypted,
1030 * supplicant is allowed to encrypt it.
1031 */
1032 if (msg == SMK_ERROR) {
1033#ifdef CONFIG_PEERKEY
1034 wpa_smk_error(wpa_auth, sm, key);
1035#endif /* CONFIG_PEERKEY */
1036 return;
1037 } else if (key_info & WPA_KEY_INFO_ERROR) {
ec027805
JM		 1038 wpa_receive_error_report(
1039 wpa_auth, sm,
1040 !(key_info & WPA_KEY_INFO_KEY_TYPE));
6fc6879b
JM		 1041 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1042 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1043 "received EAPOL-Key Request for new "
1044 "4-Way Handshake");
1045 wpa_request_new_ptk(sm);
1046#ifdef CONFIG_PEERKEY
1047 } else if (msg == SMK_M1) {
1048 wpa_smk_m1(wpa_auth, sm, key);
1049#endif /* CONFIG_PEERKEY */
1050 } else if (key_data_length > 0 &&
1051 wpa_parse_kde_ies((const u8 *) (key + 1),
1052 key_data_length, &kde) == 0 &&
1053 kde.mac_addr) {
1054 } else {
1055 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1056 "received EAPOL-Key Request for GTK "
1057 "rekeying");
1058 /* FIX: why was this triggering PTK rekeying for the
1059 * STA that requested Group Key rekeying?? */
1060 /* wpa_request_new_ptk(sta->wpa_sm); */
1061 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1062 wpa_rekey_gtk(wpa_auth, NULL);
1063 }
1064 } else {
22a299ee
JM		 1065 /* Do not allow the same key replay counter to be reused. This
1066 * does also invalidate all other pending replay counters if
1067 * retransmissions were used, i.e., we will only process one of
1068 * the pending replies and ignore rest if more than one is
1069 * received. */
1070 sm->key_replay[0].valid = FALSE;
6fc6879b
JM		 1071 }
1072
1073#ifdef CONFIG_PEERKEY
1074 if (msg == SMK_M3) {
1075 wpa_smk_m3(wpa_auth, sm, key);
1076 return;
1077 }
1078#endif /* CONFIG_PEERKEY */
1079
1080 os_free(sm->last_rx_eapol_key);
1081 sm->last_rx_eapol_key = os_malloc(data_len);
1082 if (sm->last_rx_eapol_key == NULL)
1083 return;
1084 os_memcpy(sm->last_rx_eapol_key, data, data_len);
1085 sm->last_rx_eapol_key_len = data_len;
1086
1087 sm->EAPOLKeyReceived = TRUE;
1088 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1089 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1090 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1091 wpa_sm_step(sm);
1092}
1093
1094
3c7302c2
JM		 1095static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1096 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1097{
5cb9d5c3
JM		 1098 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1099 u8 *pos;
3c7302c2 1100 int ret = 0;
6fc6879b 1101
5cb9d5c3
JM		 1102 /* GTK = PRF-X(GMK, "Group key expansion",
1103 * AA || GNonce || Time || random data)
1104 * The example described in the IEEE 802.11 standard uses only AA and
1105 * GNonce as inputs here. Add some more entropy since this derivation
1106 * is done only at the Authenticator and as such, does not need to be
1107 * exactly same.
1108 */
6fc6879b
JM		 1109 os_memcpy(data, addr, ETH_ALEN);
1110 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1111 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1112 wpa_get_ntp_timestamp(pos);
1113 pos += 8;
3642c431 1114 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1115 ret = -1;
6fc6879b 1116
56586197 1117#ifdef CONFIG_IEEE80211W
5cb9d5c3 1118 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1119#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1120 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1121 < 0)
1122 ret = -1;
56586197 1123#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1124
1125 return ret;
6fc6879b
JM		 1126}
1127
1128
1129static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1130{
1131 struct wpa_authenticator *wpa_auth = eloop_ctx;
1132 struct wpa_state_machine *sm = timeout_ctx;
1133
e4bf4db9 1134 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1135 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1136 sm->TimeoutEvt = TRUE;
1137 wpa_sm_step(sm);
1138}
1139
1140
1141void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1142 struct wpa_state_machine *sm, int key_info,
1143 const u8 *key_rsc, const u8 *nonce,
1144 const u8 *kde, size_t kde_len,
1145 int keyidx, int encr, int force_version)
1146{
1147 struct ieee802_1x_hdr *hdr;
1148 struct wpa_eapol_key *key;
1149 size_t len;
1150 int alg;
1151 int key_data_len, pad_len = 0;
1152 u8 *buf, *pos;
1153 int version, pairwise;
22a299ee 1154 int i;
6fc6879b
JM		 1155
1156 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
1157
1158 if (force_version)
1159 version = force_version;
1160 else if (wpa_use_aes_cmac(sm))
1161 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1162 else if (sm->pairwise == WPA_CIPHER_CCMP)
1163 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1164 else
1165 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1166
1167 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1168
1169 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1170 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1171 "encr=%d)",
1172 version,
1173 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1174 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1175 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1176 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1177 pairwise, (unsigned long) kde_len, keyidx, encr);
1178
1179 key_data_len = kde_len;
1180
1181 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1182 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1183 pad_len = key_data_len % 8;
1184 if (pad_len)
1185 pad_len = 8 - pad_len;
1186 key_data_len += pad_len + 8;
1187 }
1188
1189 len += key_data_len;
1190
1191 hdr = os_zalloc(len);
1192 if (hdr == NULL)
1193 return;
1194 hdr->version = wpa_auth->conf.eapol_version;
1195 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1196 hdr->length = host_to_be16(len - sizeof(*hdr));
1197 key = (struct wpa_eapol_key *) (hdr + 1);
1198
1199 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1200 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1201 key_info |= version;
1202 if (encr && sm->wpa == WPA_VERSION_WPA2)
1203 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1204 if (sm->wpa != WPA_VERSION_WPA2)
1205 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1206 WPA_PUT_BE16(key->key_info, key_info);
1207
1208 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1209 switch (alg) {
1210 case WPA_CIPHER_CCMP:
1211 WPA_PUT_BE16(key->key_length, 16);
1212 break;
1213 case WPA_CIPHER_TKIP:
1214 WPA_PUT_BE16(key->key_length, 32);
1215 break;
1216 case WPA_CIPHER_WEP40:
1217 WPA_PUT_BE16(key->key_length, 5);
1218 break;
1219 case WPA_CIPHER_WEP104:
1220 WPA_PUT_BE16(key->key_length, 13);
1221 break;
1222 }
1223 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1224 WPA_PUT_BE16(key->key_length, 0);
1225
1226 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1227 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1228 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1229 os_memcpy(sm->key_replay[i].counter,
1230 sm->key_replay[i - 1].counter,
1231 WPA_REPLAY_COUNTER_LEN);
1232 }
1233 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1234 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1235 WPA_REPLAY_COUNTER_LEN);
22a299ee 1236 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1237
1238 if (nonce)
1239 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1240
1241 if (key_rsc)
1242 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1243
1244 if (kde && !encr) {
1245 os_memcpy(key + 1, kde, kde_len);
1246 WPA_PUT_BE16(key->key_data_length, kde_len);
1247 } else if (encr && kde) {
1248 buf = os_zalloc(key_data_len);
1249 if (buf == NULL) {
1250 os_free(hdr);
1251 return;
1252 }
1253 pos = buf;
1254 os_memcpy(pos, kde, kde_len);
1255 pos += kde_len;
1256
1257 if (pad_len)
1258 *pos++ = 0xdd;
1259
1260 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1261 buf, key_data_len);
1262 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1263 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1264 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1265 (u8 *) (key + 1))) {
1266 os_free(hdr);
1267 os_free(buf);
1268 return;
1269 }
1270 WPA_PUT_BE16(key->key_data_length, key_data_len);
1271 } else {
1272 u8 ek[32];
1273 os_memcpy(key->key_iv,
1274 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1275 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1276 os_memcpy(ek, key->key_iv, 16);
1277 os_memcpy(ek + 16, sm->PTK.kek, 16);
1278 os_memcpy(key + 1, buf, key_data_len);
1279 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1280 WPA_PUT_BE16(key->key_data_length, key_data_len);
1281 }
1282 os_free(buf);
1283 }
1284
1285 if (key_info & WPA_KEY_INFO_MIC) {
1286 if (!sm->PTK_valid) {
1287 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1288 "PTK not valid when sending EAPOL-Key "
1289 "frame");
1290 os_free(hdr);
1291 return;
1292 }
1293 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1294 key->key_mic);
1295 }
1296
1297 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1298 1);
1299 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1300 sm->pairwise_set);
1301 os_free(hdr);
1302}
1303
1304
1305static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1306 struct wpa_state_machine *sm, int key_info,
1307 const u8 *key_rsc, const u8 *nonce,
1308 const u8 *kde, size_t kde_len,
1309 int keyidx, int encr)
1310{
1311 int timeout_ms;
1312 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
bae61562 1313 int ctr;
6fc6879b
JM		 1314
1315 if (sm == NULL)
1316 return;
1317
1318 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1319 keyidx, encr, 0);
1320
bae61562 1321 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1322 if (ctr == 1 && wpa_auth->conf.tx_status)
bae61562
JM		 1323 timeout_ms = eapol_key_timeout_first;
1324 else
1325 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1326 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1327 sm->pending_1_of_4_timeout = 1;
1328 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1329 "counter %d)", timeout_ms, ctr);
6fc6879b
JM		 1330 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1331 wpa_send_eapol_timeout, wpa_auth, sm);
1332}
1333
1334
1335static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1336{
1337 struct ieee802_1x_hdr *hdr;
1338 struct wpa_eapol_key *key;
1339 u16 key_info;
1340 int ret = 0;
1341 u8 mic[16];
1342
1343 if (data_len < sizeof(*hdr) + sizeof(*key))
1344 return -1;
1345
1346 hdr = (struct ieee802_1x_hdr *) data;
1347 key = (struct wpa_eapol_key *) (hdr + 1);
1348 key_info = WPA_GET_BE16(key->key_info);
1349 os_memcpy(mic, key->key_mic, 16);
1350 os_memset(key->key_mic, 0, 16);
1351 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1352 data, data_len, key->key_mic) ||
1353 os_memcmp(mic, key->key_mic, 16) != 0)
1354 ret = -1;
1355 os_memcpy(key->key_mic, mic, 16);
1356 return ret;
1357}
1358
1359
1360void wpa_remove_ptk(struct wpa_state_machine *sm)
1361{
1362 sm->PTK_valid = FALSE;
1363 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
26083221 1364 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
6fc6879b 1365 sm->pairwise_set = FALSE;
581a8cde 1366 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1367}
1368
1369
6f9b5d16 1370int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
6fc6879b 1371{
5d22a1d5
JM		 1372 int remove_ptk = 1;
1373
6fc6879b 1374 if (sm == NULL)
6f9b5d16 1375 return -1;
6fc6879b
JM		 1376
1377 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1378 "event %d notification", event);
1379
1380 switch (event) {
1381 case WPA_AUTH:
1382 case WPA_ASSOC:
1383 break;
1384 case WPA_DEAUTH:
1385 case WPA_DISASSOC:
1386 sm->DeauthenticationRequest = TRUE;
1387 break;
1388 case WPA_REAUTH:
1389 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1390 if (!sm->started) {
1391 /*
1392 * When using WPS, we may end up here if the STA
1393 * manages to re-associate without the previous STA
1394 * entry getting removed. Consequently, we need to make
1395 * sure that the WPA state machines gets initialized
1396 * properly at this point.
1397 */
1398 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1399 "started - initialize now");
1400 sm->started = 1;
1401 sm->Init = TRUE;
1402 if (wpa_sm_step(sm) == 1)
1403 return 1; /* should not really happen */
1404 sm->Init = FALSE;
1405 sm->AuthenticationRequest = TRUE;
1406 break;
1407 }
9663596f
JM		 1408 if (sm->GUpdateStationKeys) {
1409 /*
1410 * Reauthentication cancels the pending group key
1411 * update for this STA.
1412 */
1413 sm->group->GKeyDoneStations--;
1414 sm->GUpdateStationKeys = FALSE;
1415 sm->PtkGroupInit = TRUE;
1416 }
6fc6879b
JM		 1417 sm->ReAuthenticationRequest = TRUE;
1418 break;
1419 case WPA_ASSOC_FT:
1420#ifdef CONFIG_IEEE80211R
81a658d7
JM		 1421 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1422 "after association");
1423 wpa_ft_install_ptk(sm);
1424
6fc6879b
JM		 1425 /* Using FT protocol, not WPA auth state machine */
1426 sm->ft_completed = 1;
6f9b5d16 1427 return 0;
6fc6879b
JM		 1428#else /* CONFIG_IEEE80211R */
1429 break;
1430#endif /* CONFIG_IEEE80211R */
1431 }
1432
1433#ifdef CONFIG_IEEE80211R
1434 sm->ft_completed = 0;
1435#endif /* CONFIG_IEEE80211R */
1436
5d22a1d5
JM		 1437#ifdef CONFIG_IEEE80211W
1438 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1439 remove_ptk = 0;
1440#endif /* CONFIG_IEEE80211W */
6fc6879b 1441
5d22a1d5
JM		 1442 if (remove_ptk) {
1443 sm->PTK_valid = FALSE;
1444 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1445
1446 if (event != WPA_REAUTH_EAPOL)
1447 wpa_remove_ptk(sm);
1448 }
6fc6879b 1449
6f9b5d16 1450 return wpa_sm_step(sm);
6fc6879b
JM		 1451}
1452
1453
71934751 1454static enum wpa_alg wpa_alg_enum(int alg)
6fc6879b
JM		 1455{
1456 switch (alg) {
1457 case WPA_CIPHER_CCMP:
89d39d9d 1458 return WPA_ALG_CCMP;
6fc6879b 1459 case WPA_CIPHER_TKIP:
89d39d9d 1460 return WPA_ALG_TKIP;
6fc6879b
JM		 1461 case WPA_CIPHER_WEP104:
1462 case WPA_CIPHER_WEP40:
89d39d9d 1463 return WPA_ALG_WEP;
6fc6879b 1464 default:
89d39d9d 1465 return WPA_ALG_NONE;
6fc6879b
JM		 1466 }
1467}
1468
1469
1470SM_STATE(WPA_PTK, INITIALIZE)
1471{
1472 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1473 if (sm->Init) {
1474 /* Init flag is not cleared here, so avoid busy
1475 * loop by claiming nothing changed. */
1476 sm->changed = FALSE;
1477 }
1478
1479 sm->keycount = 0;
1480 if (sm->GUpdateStationKeys)
1481 sm->group->GKeyDoneStations--;
1482 sm->GUpdateStationKeys = FALSE;
1483 if (sm->wpa == WPA_VERSION_WPA)
1484 sm->PInitAKeys = FALSE;
1485 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1486 * Local AA > Remote AA)) */) {
1487 sm->Pair = TRUE;
1488 }
1489 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1490 wpa_remove_ptk(sm);
1491 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1492 sm->TimeoutCtr = 0;
56586197 1493 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1494 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1495 WPA_EAPOL_authorized, 0);
1496 }
1497}
1498
1499
1500SM_STATE(WPA_PTK, DISCONNECT)
1501{
1502 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1503 sm->Disconnect = FALSE;
1504 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1505}
1506
1507
1508SM_STATE(WPA_PTK, DISCONNECTED)
1509{
1510 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1511 sm->DeauthenticationRequest = FALSE;
1512}
1513
1514
1515SM_STATE(WPA_PTK, AUTHENTICATION)
1516{
1517 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1518 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1519 sm->PTK_valid = FALSE;
1520 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1521 1);
1522 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1523 sm->AuthenticationRequest = FALSE;
1524}
1525
1526
1bdb7ab3
JM		 1527static void wpa_group_first_station(struct wpa_authenticator *wpa_auth,
1528 struct wpa_group *group)
1529{
1530 /*
1531 * System has run bit further than at the time hostapd was started
1532 * potentially very early during boot up. This provides better chances
1533 * of collecting more randomness on embedded systems. Re-initialize the
1534 * GMK and Counter here to improve their strength if there was not
1535 * enough entropy available immediately after system startup.
1536 */
1537 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1538 "station");
08704cd8
JM		 1539 if (random_pool_ready() != 1) {
1540 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1541 "to proceed - reject first 4-way handshake");
1542 group->reject_4way_hs_for_entropy = TRUE;
1543 }
1bdb7ab3
JM		 1544 wpa_group_init_gmk_and_counter(wpa_auth, group);
1545 wpa_gtk_update(wpa_auth, group);
1546 wpa_group_config_group_keys(wpa_auth, group);
1547}
1548
1549
6fc6879b
JM		 1550SM_STATE(WPA_PTK, AUTHENTICATION2)
1551{
1552 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3
JM		 1553
1554 if (!sm->group->first_sta_seen) {
1555 wpa_group_first_station(sm->wpa_auth, sm->group);
1556 sm->group->first_sta_seen = TRUE;
1557 }
1558
6fc6879b 1559 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
bc8318ac
JM		 1560 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1561 WPA_NONCE_LEN);
6fc6879b
JM		 1562 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1563 sm->ReAuthenticationRequest = FALSE;
1564 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1565 * logical place than INITIALIZE since AUTHENTICATION2 can be
1566 * re-entered on ReAuthenticationRequest without going through
1567 * INITIALIZE. */
1568 sm->TimeoutCtr = 0;
1569}
1570
1571
1572SM_STATE(WPA_PTK, INITPMK)
1573{
1574 u8 msk[2 * PMK_LEN];
1575 size_t len = 2 * PMK_LEN;
1576
1577 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1578#ifdef CONFIG_IEEE80211R
1579 sm->xxkey_len = 0;
1580#endif /* CONFIG_IEEE80211R */
1581 if (sm->pmksa) {
1582 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1583 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1584 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1585 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1586 "(len=%lu)", (unsigned long) len);
1587 os_memcpy(sm->PMK, msk, PMK_LEN);
1588#ifdef CONFIG_IEEE80211R
1589 if (len >= 2 * PMK_LEN) {
1590 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1591 sm->xxkey_len = PMK_LEN;
1592 }
1593#endif /* CONFIG_IEEE80211R */
1594 } else {
1595 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1596 }
1597
1598 sm->req_replay_counter_used = 0;
1599 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1600 * will break reauthentication since EAPOL state machines may not be
1601 * get into AUTHENTICATING state that clears keyRun before WPA state
1602 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1603 * state and takes PMK from the previously used AAA Key. This will
1604 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1605 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1606 * be good workaround for this issue. */
1607 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1608}
1609
1610
1611SM_STATE(WPA_PTK, INITPSK)
1612{
1613 const u8 *psk;
1614 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1615 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1616 if (psk) {
1617 os_memcpy(sm->PMK, psk, PMK_LEN);
1618#ifdef CONFIG_IEEE80211R
1619 os_memcpy(sm->xxkey, psk, PMK_LEN);
1620 sm->xxkey_len = PMK_LEN;
1621#endif /* CONFIG_IEEE80211R */
1622 }
1623 sm->req_replay_counter_used = 0;
1624}
1625
1626
1627SM_STATE(WPA_PTK, PTKSTART)
1628{
1629 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1630 size_t pmkid_len = 0;
1631
1632 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1633 sm->PTKRequest = FALSE;
1634 sm->TimeoutEvt = FALSE;
bae61562
JM		 1635
1636 sm->TimeoutCtr++;
1637 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1638 /* No point in sending the EAPOL-Key - we will disconnect
1639 * immediately following this. */
1640 return;
1641 }
1642
6fc6879b
JM		 1643 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1644 "sending 1/4 msg of 4-Way Handshake");
1645 /*
1646 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1647 * one possible PSK for this STA.
1648 */
1649 if (sm->wpa == WPA_VERSION_WPA2 &&
56586197 1650 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1651 pmkid = buf;
1652 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1653 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1654 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1655 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1656 if (sm->pmksa)
1657 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1658 sm->pmksa->pmkid, PMKID_LEN);
1659 else {
1660 /*
1661 * Calculate PMKID since no PMKSA cache entry was
1662 * available with pre-calculated PMKID.
1663 */
1664 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
56586197
JM		 1665 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1666 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1667 }
1668 }
1669 wpa_send_eapol(sm->wpa_auth, sm,
1670 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1671 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 1672}
1673
1674
1675static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1676 struct wpa_ptk *ptk)
1677{
c0a61908 1678 size_t ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
6fc6879b 1679#ifdef CONFIG_IEEE80211R
56586197 1680 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
c0a61908 1681 return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
6fc6879b
JM		 1682#endif /* CONFIG_IEEE80211R */
1683
1684 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1685 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
c0a61908 1686 (u8 *) ptk, ptk_len,
56586197 1687 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1688
1689 return 0;
1690}
1691
1692
1693SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1694{
1695 struct wpa_ptk PTK;
1696 int ok = 0;
1697 const u8 *pmk = NULL;
1698
1699 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1700 sm->EAPOLKeyReceived = FALSE;
1701
1702 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1703 * WPA-PSK: iterate through possible PSKs and select the one matching
1704 * the packet */
1705 for (;;) {
56586197 1706 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1707 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1708 if (pmk == NULL)
1709 break;
1710 } else
1711 pmk = sm->PMK;
1712
1713 wpa_derive_ptk(sm, pmk, &PTK);
1714
1715 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1716 sm->last_rx_eapol_key_len) == 0) {
1717 ok = 1;
1718 break;
1719 }
1720
56586197 1721 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 1722 break;
1723 }
1724
1725 if (!ok) {
1726 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1727 "invalid MIC in msg 2/4 of 4-Way Handshake");
1728 return;
1729 }
1730
26e23750
JM		 1731#ifdef CONFIG_IEEE80211R
1732 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1733 /*
1734 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
1735 * with the value we derived.
1736 */
1737 if (os_memcmp(sm->sup_pmk_r1_name, sm->pmk_r1_name,
1738 WPA_PMK_NAME_LEN) != 0) {
1739 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1740 "PMKR1Name mismatch in FT 4-way "
1741 "handshake");
1742 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
1743 "Supplicant",
1744 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
1745 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
1746 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
1747 return;
1748 }
1749 }
1750#endif /* CONFIG_IEEE80211R */
1751
e4bf4db9 1752 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1753 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1754
56586197 1755 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1756 /* PSK may have changed from the previous choice, so update
1757 * state machine data based on whatever PSK was selected here.
1758 */
1759 os_memcpy(sm->PMK, pmk, PMK_LEN);
1760 }
1761
1762 sm->MICVerified = TRUE;
1763
1764 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1765 sm->PTK_valid = TRUE;
1766}
1767
1768
1769SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1770{
1771 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1772 sm->TimeoutCtr = 0;
1773}
1774
1775
1776#ifdef CONFIG_IEEE80211W
1777
1778static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1779{
1780 if (sm->mgmt_frame_prot) {
1781 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1782 }
1783
1784 return 0;
1785}
1786
1787
1788static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1789{
1790 struct wpa_igtk_kde igtk;
1791 struct wpa_group *gsm = sm->group;
1792
1793 if (!sm->mgmt_frame_prot)
1794 return pos;
1795
1796 igtk.keyid[0] = gsm->GN_igtk;
1797 igtk.keyid[1] = 0;
7b1080da
JM		 1798 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
1799 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn) < 0)
6fc6879b
JM		 1800 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1801 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1802 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1803 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1804
1805 return pos;
1806}
1807
1808#else /* CONFIG_IEEE80211W */
1809
1810static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1811{
1812 return 0;
1813}
1814
1815
1816static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1817{
1818 return pos;
1819}
1820
1821#endif /* CONFIG_IEEE80211W */
1822
1823
1824SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1825{
1826 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1827 size_t gtk_len, kde_len;
1828 struct wpa_group *gsm = sm->group;
1829 u8 *wpa_ie;
1830 int wpa_ie_len, secure, keyidx, encr = 0;
1831
1832 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1833 sm->TimeoutEvt = FALSE;
bae61562
JM		 1834
1835 sm->TimeoutCtr++;
1836 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1837 /* No point in sending the EAPOL-Key - we will disconnect
1838 * immediately following this. */
1839 return;
1840 }
1841
86dfabb8
JM		 1842 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
1843 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 1844 */
1845 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1846 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 1847 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 1848 wpa_ie = sm->wpa_auth->wpa_ie;
1849 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1850 if (sm->wpa == WPA_VERSION_WPA &&
1851 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1852 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1853 /* WPA-only STA, remove RSN IE */
1854 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1855 wpa_ie_len = wpa_ie[1] + 2;
1856 }
1857 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1858 "sending 3/4 msg of 4-Way Handshake");
1859 if (sm->wpa == WPA_VERSION_WPA2) {
1860 /* WPA2 send GTK in the 4-way handshake */
1861 secure = 1;
1862 gtk = gsm->GTK[gsm->GN - 1];
1863 gtk_len = gsm->GTK_len;
1864 keyidx = gsm->GN;
1865 _rsc = rsc;
1866 encr = 1;
1867 } else {
1868 /* WPA does not include GTK in msg 3/4 */
1869 secure = 0;
1870 gtk = NULL;
1871 gtk_len = 0;
1872 keyidx = 0;
1873 _rsc = NULL;
1874 }
1875
1876 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1877 if (gtk)
1878 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
26e23750 1879#ifdef CONFIG_IEEE80211R
86dfabb8
JM		 1880 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1881 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
1882 kde_len += 300; /* FTIE + 2 * TIE */
1883 }
26e23750 1884#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 1885 kde = os_malloc(kde_len);
1886 if (kde == NULL)
1887 return;
1888
1889 pos = kde;
1890 os_memcpy(pos, wpa_ie, wpa_ie_len);
1891 pos += wpa_ie_len;
26e23750
JM		 1892#ifdef CONFIG_IEEE80211R
1893 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1894 int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
1895 if (res < 0) {
1896 wpa_printf(MSG_ERROR, "FT: Failed to insert "
1897 "PMKR1Name into RSN IE in EAPOL-Key data");
1898 os_free(kde);
1899 return;
1900 }
1901 pos += res;
1902 }
1903#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 1904 if (gtk) {
1905 u8 hdr[2];
1906 hdr[0] = keyidx & 0x03;
1907 hdr[1] = 0;
1908 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1909 gtk, gtk_len);
1910 }
1911 pos = ieee80211w_kde_add(sm, pos);
1912
86dfabb8
JM		 1913#ifdef CONFIG_IEEE80211R
1914 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1915 int res;
1916 struct wpa_auth_config *conf;
1917
1918 conf = &sm->wpa_auth->conf;
1919 res = wpa_write_ftie(conf, conf->r0_key_holder,
1920 conf->r0_key_holder_len,
1921 NULL, NULL, pos, kde + kde_len - pos,
1922 NULL, 0);
1923 if (res < 0) {
1924 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
1925 "into EAPOL-Key Key Data");
1926 os_free(kde);
1927 return;
1928 }
1929 pos += res;
1930
1931 /* TIE[ReassociationDeadline] (TU) */
1932 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1933 *pos++ = 5;
1934 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
1935 WPA_PUT_LE32(pos, conf->reassociation_deadline);
1936 pos += 4;
1937
1938 /* TIE[KeyLifetime] (seconds) */
1939 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1940 *pos++ = 5;
1941 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
1942 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
1943 pos += 4;
1944 }
1945#endif /* CONFIG_IEEE80211R */
1946
6fc6879b
JM		 1947 wpa_send_eapol(sm->wpa_auth, sm,
1948 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1949 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1950 WPA_KEY_INFO_KEY_TYPE,
1951 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1952 os_free(kde);
6fc6879b
JM		 1953}
1954
1955
1956SM_STATE(WPA_PTK, PTKINITDONE)
1957{
1958 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1959 sm->EAPOLKeyReceived = FALSE;
1960 if (sm->Pair) {
71934751 1961 enum wpa_alg alg;
6fc6879b
JM		 1962 int klen;
1963 if (sm->pairwise == WPA_CIPHER_TKIP) {
89d39d9d 1964 alg = WPA_ALG_TKIP;
6fc6879b
JM		 1965 klen = 32;
1966 } else {
89d39d9d 1967 alg = WPA_ALG_CCMP;
6fc6879b
JM		 1968 klen = 16;
1969 }
1970 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1971 sm->PTK.tk1, klen)) {
1972 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1973 return;
1974 }
1975 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1976 sm->pairwise_set = TRUE;
1977
581a8cde
JM		 1978 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1979 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1980 eloop_register_timeout(sm->wpa_auth->conf.
1981 wpa_ptk_rekey, 0, wpa_rekey_ptk,
1982 sm->wpa_auth, sm);
1983 }
1984
56586197 1985 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1986 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1987 WPA_EAPOL_authorized, 1);
1988 }
1989 }
1990
1991 if (0 /* IBSS == TRUE */) {
1992 sm->keycount++;
1993 if (sm->keycount == 2) {
1994 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1995 WPA_EAPOL_portValid, 1);
1996 }
1997 } else {
1998 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1999 1);
2000 }
2001 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2002 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2003 if (sm->wpa == WPA_VERSION_WPA)
2004 sm->PInitAKeys = TRUE;
2005 else
2006 sm->has_GTK = TRUE;
2007 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2008 "pairwise key handshake completed (%s)",
2009 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2010
2011#ifdef CONFIG_IEEE80211R
2012 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2013#endif /* CONFIG_IEEE80211R */
2014}
2015
2016
2017SM_STEP(WPA_PTK)
2018{
2019 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2020
2021 if (sm->Init)
2022 SM_ENTER(WPA_PTK, INITIALIZE);
2023 else if (sm->Disconnect
1aae01fc
BG		 2024 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2025 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2026 "WPA_PTK: sm->Disconnect");
6fc6879b 2027 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 2028 }
6fc6879b
JM		 2029 else if (sm->DeauthenticationRequest)
2030 SM_ENTER(WPA_PTK, DISCONNECTED);
2031 else if (sm->AuthenticationRequest)
2032 SM_ENTER(WPA_PTK, AUTHENTICATION);
2033 else if (sm->ReAuthenticationRequest)
2034 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2035 else if (sm->PTKRequest)
2036 SM_ENTER(WPA_PTK, PTKSTART);
2037 else switch (sm->wpa_ptk_state) {
2038 case WPA_PTK_INITIALIZE:
2039 break;
2040 case WPA_PTK_DISCONNECT:
2041 SM_ENTER(WPA_PTK, DISCONNECTED);
2042 break;
2043 case WPA_PTK_DISCONNECTED:
2044 SM_ENTER(WPA_PTK, INITIALIZE);
2045 break;
2046 case WPA_PTK_AUTHENTICATION:
2047 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2048 break;
2049 case WPA_PTK_AUTHENTICATION2:
56586197 2050 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 2051 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2052 WPA_EAPOL_keyRun) > 0)
2053 SM_ENTER(WPA_PTK, INITPMK);
56586197 2054 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 2055 /* FIX: && 802.1X::keyRun */)
2056 SM_ENTER(WPA_PTK, INITPSK);
2057 break;
2058 case WPA_PTK_INITPMK:
2059 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2060 WPA_EAPOL_keyAvailable) > 0)
2061 SM_ENTER(WPA_PTK, PTKSTART);
2062 else {
2063 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2064 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2065 "INITPMK - keyAvailable = false");
6fc6879b
JM		 2066 SM_ENTER(WPA_PTK, DISCONNECT);
2067 }
2068 break;
2069 case WPA_PTK_INITPSK:
2070 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
2071 SM_ENTER(WPA_PTK, PTKSTART);
2072 else {
2073 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2074 "no PSK configured for the STA");
2075 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2076 SM_ENTER(WPA_PTK, DISCONNECT);
2077 }
2078 break;
2079 case WPA_PTK_PTKSTART:
2080 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2081 sm->EAPOLKeyPairwise)
2082 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2083 else if (sm->TimeoutCtr >
2084 (int) dot11RSNAConfigPairwiseUpdateCount) {
2085 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2086 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2087 "PTKSTART: Retry limit %d reached",
2088 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2089 SM_ENTER(WPA_PTK, DISCONNECT);
2090 } else if (sm->TimeoutEvt)
2091 SM_ENTER(WPA_PTK, PTKSTART);
2092 break;
2093 case WPA_PTK_PTKCALCNEGOTIATING:
2094 if (sm->MICVerified)
2095 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2096 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2097 sm->EAPOLKeyPairwise)
2098 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2099 else if (sm->TimeoutEvt)
2100 SM_ENTER(WPA_PTK, PTKSTART);
2101 break;
2102 case WPA_PTK_PTKCALCNEGOTIATING2:
2103 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2104 break;
2105 case WPA_PTK_PTKINITNEGOTIATING:
2106 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2107 sm->EAPOLKeyPairwise && sm->MICVerified)
2108 SM_ENTER(WPA_PTK, PTKINITDONE);
2109 else if (sm->TimeoutCtr >
2110 (int) dot11RSNAConfigPairwiseUpdateCount) {
2111 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2112 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2113 "PTKINITNEGOTIATING: Retry limit %d "
2114 "reached",
2115 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2116 SM_ENTER(WPA_PTK, DISCONNECT);
2117 } else if (sm->TimeoutEvt)
2118 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2119 break;
2120 case WPA_PTK_PTKINITDONE:
2121 break;
2122 }
2123}
2124
2125
2126SM_STATE(WPA_PTK_GROUP, IDLE)
2127{
2128 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2129 if (sm->Init) {
2130 /* Init flag is not cleared here, so avoid busy
2131 * loop by claiming nothing changed. */
2132 sm->changed = FALSE;
2133 }
2134 sm->GTimeoutCtr = 0;
2135}
2136
2137
2138SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2139{
2140 u8 rsc[WPA_KEY_RSC_LEN];
2141 struct wpa_group *gsm = sm->group;
2142 u8 *kde, *pos, hdr[2];
2143 size_t kde_len;
2144
2145 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 2146
2147 sm->GTimeoutCtr++;
2148 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2149 /* No point in sending the EAPOL-Key - we will disconnect
2150 * immediately following this. */
2151 return;
2152 }
2153
6fc6879b
JM		 2154 if (sm->wpa == WPA_VERSION_WPA)
2155 sm->PInitAKeys = FALSE;
2156 sm->TimeoutEvt = FALSE;
2157 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2158 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2159 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2160 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2161 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2162 "sending 1/2 msg of Group Key Handshake");
2163
2164 if (sm->wpa == WPA_VERSION_WPA2) {
2165 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2166 ieee80211w_kde_len(sm);
2167 kde = os_malloc(kde_len);
2168 if (kde == NULL)
2169 return;
2170
2171 pos = kde;
2172 hdr[0] = gsm->GN & 0x03;
2173 hdr[1] = 0;
2174 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2175 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2176 pos = ieee80211w_kde_add(sm, pos);
2177 } else {
2178 kde = gsm->GTK[gsm->GN - 1];
2179 pos = kde + gsm->GTK_len;
2180 }
2181
2182 wpa_send_eapol(sm->wpa_auth, sm,
2183 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2184 WPA_KEY_INFO_ACK |
2185 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2186 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
2187 if (sm->wpa == WPA_VERSION_WPA2)
2188 os_free(kde);
6fc6879b
JM		 2189}
2190
2191
2192SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2193{
2194 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2195 sm->EAPOLKeyReceived = FALSE;
2196 if (sm->GUpdateStationKeys)
2197 sm->group->GKeyDoneStations--;
2198 sm->GUpdateStationKeys = FALSE;
2199 sm->GTimeoutCtr = 0;
2200 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2201 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2202 "group key handshake completed (%s)",
2203 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2204 sm->has_GTK = TRUE;
2205}
2206
2207
2208SM_STATE(WPA_PTK_GROUP, KEYERROR)
2209{
2210 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2211 if (sm->GUpdateStationKeys)
2212 sm->group->GKeyDoneStations--;
2213 sm->GUpdateStationKeys = FALSE;
2214 sm->Disconnect = TRUE;
2215}
2216
2217
2218SM_STEP(WPA_PTK_GROUP)
2219{
9663596f 2220 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 2221 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 2222 sm->PtkGroupInit = FALSE;
2223 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 2224 case WPA_PTK_GROUP_IDLE:
2225 if (sm->GUpdateStationKeys ||
2226 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2227 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2228 break;
2229 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2230 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2231 !sm->EAPOLKeyPairwise && sm->MICVerified)
2232 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2233 else if (sm->GTimeoutCtr >
2234 (int) dot11RSNAConfigGroupUpdateCount)
2235 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2236 else if (sm->TimeoutEvt)
2237 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2238 break;
2239 case WPA_PTK_GROUP_KEYERROR:
2240 SM_ENTER(WPA_PTK_GROUP, IDLE);
2241 break;
2242 case WPA_PTK_GROUP_REKEYESTABLISHED:
2243 SM_ENTER(WPA_PTK_GROUP, IDLE);
2244 break;
2245 }
2246}
2247
2248
2249static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2250 struct wpa_group *group)
2251{
2252 int ret = 0;
2253
6fc6879b
JM		 2254 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2255 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2256 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2257 wpa_auth->addr, group->GNonce,
2258 group->GTK[group->GN - 1], group->GTK_len) < 0)
2259 ret = -1;
5cb9d5c3
JM		 2260 wpa_hexdump_key(MSG_DEBUG, "GTK",
2261 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 2262
2263#ifdef CONFIG_IEEE80211W
70f8cc8e 2264 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
5cb9d5c3
JM		 2265 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2266 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2267 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2268 wpa_auth->addr, group->GNonce,
2269 group->IGTK[group->GN_igtk - 4],
2270 WPA_IGTK_LEN) < 0)
2271 ret = -1;
6fc6879b
JM		 2272 wpa_hexdump_key(MSG_DEBUG, "IGTK",
2273 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
2274 }
2275#endif /* CONFIG_IEEE80211W */
2276
2277 return ret;
2278}
2279
2280
2281static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2282 struct wpa_group *group)
2283{
2284 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2285 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2286 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2287 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2288
2289 /* GTK[0..N] = 0 */
2290 os_memset(group->GTK, 0, sizeof(group->GTK));
2291 group->GN = 1;
2292 group->GM = 2;
2293#ifdef CONFIG_IEEE80211W
2294 group->GN_igtk = 4;
2295 group->GM_igtk = 5;
2296#endif /* CONFIG_IEEE80211W */
2297 /* GTK[GN] = CalcGTK() */
2298 wpa_gtk_update(wpa_auth, group);
2299}
2300
2301
2302static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2303{
2304 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2305 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2306 "Not in PTKINITDONE; skip Group Key update");
3c183894 2307 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 2308 return 0;
2309 }
9663596f
JM		 2310 if (sm->GUpdateStationKeys) {
2311 /*
3c183894
JM		 2312 * This should not really happen, so add a debug log entry.
2313 * Since we clear the GKeyDoneStations before the loop, the
2314 * station needs to be counted here anyway.
9663596f
JM		 2315 */
2316 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 2317 "GUpdateStationKeys was already set when "
2318 "marking station for GTK rekeying");
9663596f 2319 }
3c183894
JM		 2320
2321 sm->group->GKeyDoneStations++;
2322 sm->GUpdateStationKeys = TRUE;
2323
6fc6879b
JM		 2324 wpa_sm_step(sm);
2325 return 0;
2326}
2327
2328
2329static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2330 struct wpa_group *group)
2331{
2332 int tmp;
2333
2334 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2335 "SETKEYS (VLAN-ID %d)", group->vlan_id);
2336 group->changed = TRUE;
2337 group->wpa_group_state = WPA_GROUP_SETKEYS;
2338 group->GTKReKey = FALSE;
2339 tmp = group->GM;
2340 group->GM = group->GN;
2341 group->GN = tmp;
2342#ifdef CONFIG_IEEE80211W
2343 tmp = group->GM_igtk;
2344 group->GM_igtk = group->GN_igtk;
2345 group->GN_igtk = tmp;
2346#endif /* CONFIG_IEEE80211W */
2347 /* "GKeyDoneStations = GNoStations" is done in more robust way by
2348 * counting the STAs that are marked with GUpdateStationKeys instead of
2349 * including all STAs that could be in not-yet-completed state. */
2350 wpa_gtk_update(wpa_auth, group);
2351
3c183894
JM		 2352 if (group->GKeyDoneStations) {
2353 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2354 "GKeyDoneStations=%d when starting new GTK rekey",
2355 group->GKeyDoneStations);
2356 group->GKeyDoneStations = 0;
2357 }
6fc6879b
JM		 2358 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
2359 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2360 group->GKeyDoneStations);
2361}
2362
2363
1bdb7ab3
JM		 2364static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2365 struct wpa_group *group)
6fc6879b 2366{
3c7302c2
JM		 2367 int ret = 0;
2368
3c7302c2
JM		 2369 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
2370 wpa_alg_enum(wpa_auth->conf.wpa_group),
0382097e
JM		 2371 broadcast_ether_addr, group->GN,
2372 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 2373 ret = -1;
6fc6879b
JM		 2374
2375#ifdef CONFIG_IEEE80211W
3c7302c2
JM		 2376 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION &&
2377 wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK,
0382097e 2378 broadcast_ether_addr, group->GN_igtk,
3c7302c2
JM		 2379 group->IGTK[group->GN_igtk - 4],
2380 WPA_IGTK_LEN) < 0)
2381 ret = -1;
6fc6879b 2382#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 2383
2384 return ret;
6fc6879b
JM		 2385}
2386
2387
1bdb7ab3
JM		 2388static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2389 struct wpa_group *group)
2390{
2391 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2392 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2393 group->changed = TRUE;
2394 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2395
2396 if (wpa_group_config_group_keys(wpa_auth, group) < 0)
2397 return -1;
2398
2399 return 0;
2400}
2401
2402
6fc6879b
JM		 2403static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2404 struct wpa_group *group)
2405{
2406 if (group->GInit) {
2407 wpa_group_gtk_init(wpa_auth, group);
2408 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2409 group->GTKAuthenticator) {
2410 wpa_group_setkeysdone(wpa_auth, group);
2411 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2412 group->GTKReKey) {
2413 wpa_group_setkeys(wpa_auth, group);
2414 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2415 if (group->GKeyDoneStations == 0)
2416 wpa_group_setkeysdone(wpa_auth, group);
2417 else if (group->GTKReKey)
2418 wpa_group_setkeys(wpa_auth, group);
2419 }
2420}
2421
2422
e4a6ea1d 2423static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 2424{
2425 if (sm == NULL)
e4a6ea1d 2426 return 0;
6fc6879b
JM		 2427
2428 if (sm->in_step_loop) {
2429 /* This should not happen, but if it does, make sure we do not
2430 * end up freeing the state machine too early by exiting the
2431 * recursive call. */
2432 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 2433 return 0;
6fc6879b
JM		 2434 }
2435
2436 sm->in_step_loop = 1;
2437 do {
2438 if (sm->pending_deinit)
2439 break;
2440
2441 sm->changed = FALSE;
2442 sm->wpa_auth->group->changed = FALSE;
2443
2444 SM_STEP_RUN(WPA_PTK);
2445 if (sm->pending_deinit)
2446 break;
2447 SM_STEP_RUN(WPA_PTK_GROUP);
2448 if (sm->pending_deinit)
2449 break;
2450 wpa_group_sm_step(sm->wpa_auth, sm->group);
2451 } while (sm->changed || sm->wpa_auth->group->changed);
2452 sm->in_step_loop = 0;
2453
2454 if (sm->pending_deinit) {
2455 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2456 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2457 wpa_free_sta_sm(sm);
e4a6ea1d 2458 return 1;
6fc6879b 2459 }
e4a6ea1d 2460 return 0;
6fc6879b
JM		 2461}
2462
2463
2464static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2465{
2466 struct wpa_state_machine *sm = eloop_ctx;
2467 wpa_sm_step(sm);
2468}
2469
2470
2471void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2472{
2473 if (sm == NULL)
2474 return;
2475 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2476}
2477
2478
2479void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2480{
2481 int tmp, i;
2482 struct wpa_group *group;
2483
2484 if (wpa_auth == NULL)
2485 return;
2486
2487 group = wpa_auth->group;
2488
2489 for (i = 0; i < 2; i++) {
2490 tmp = group->GM;
2491 group->GM = group->GN;
2492 group->GN = tmp;
2493#ifdef CONFIG_IEEE80211W
2494 tmp = group->GM_igtk;
2495 group->GM_igtk = group->GN_igtk;
2496 group->GN_igtk = tmp;
2497#endif /* CONFIG_IEEE80211W */
2498 wpa_gtk_update(wpa_auth, group);
2499 }
2500}
2501
2502
2503static const char * wpa_bool_txt(int bool)
2504{
2505 return bool ? "TRUE" : "FALSE";
2506}
2507
2508
2509static int wpa_cipher_bits(int cipher)
2510{
2511 switch (cipher) {
2512 case WPA_CIPHER_CCMP:
2513 return 128;
2514 case WPA_CIPHER_TKIP:
2515 return 256;
2516 case WPA_CIPHER_WEP104:
2517 return 104;
2518 case WPA_CIPHER_WEP40:
2519 return 40;
2520 default:
2521 return 0;
2522 }
2523}
2524
2525
2526#define RSN_SUITE "%02x-%02x-%02x-%d"
2527#define RSN_SUITE_ARG(s) \
2528((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2529
2530int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2531{
2532 int len = 0, ret;
2533 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 2534#ifdef CONFIG_RSN_PREAUTH
2535 const int preauth = 1;
2536#else /* CONFIG_RSN_PREAUTH */
2537 const int preauth = 0;
2538#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 2539
2540 if (wpa_auth == NULL)
2541 return len;
2542
2543 ret = os_snprintf(buf + len, buflen - len,
2544 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 2545 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 2546 "dot11RSNAEnabled=%s\n"
2547 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 2548 wpa_bool_txt(preauth),
6fc6879b
JM		 2549 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2550 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2551 if (ret < 0 || (size_t) ret >= buflen - len)
2552 return len;
2553 len += ret;
2554
2555 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2556 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2557
2558 ret = os_snprintf(
2559 buf + len, buflen - len,
2560 "dot11RSNAConfigVersion=%u\n"
2561 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2562 /* FIX: dot11RSNAConfigGroupCipher */
2563 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2564 /* FIX: dot11RSNAConfigGroupRekeyTime */
2565 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2566 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2567 "dot11RSNAConfigGroupUpdateCount=%u\n"
2568 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2569 "dot11RSNAConfigGroupCipherSize=%u\n"
2570 "dot11RSNAConfigPMKLifetime=%u\n"
2571 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2572 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2573 "dot11RSNAConfigSATimeout=%u\n"
2574 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2575 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2576 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2577 "dot11RSNAPMKIDUsed=%s\n"
2578 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2579 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2580 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2581 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2582 "dot11RSNA4WayHandshakeFailures=%u\n"
2583 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2584 RSN_VERSION,
2585 !!wpa_auth->conf.wpa_strict_rekey,
2586 dot11RSNAConfigGroupUpdateCount,
2587 dot11RSNAConfigPairwiseUpdateCount,
2588 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2589 dot11RSNAConfigPMKLifetime,
2590 dot11RSNAConfigPMKReauthThreshold,
2591 dot11RSNAConfigSATimeout,
2592 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2593 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2594 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2595 pmkid_txt,
2596 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2597 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2598 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2599 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2600 wpa_auth->dot11RSNA4WayHandshakeFailures);
2601 if (ret < 0 || (size_t) ret >= buflen - len)
2602 return len;
2603 len += ret;
2604
2605 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2606 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2607
2608 /* Private MIB */
2609 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2610 wpa_auth->group->wpa_group_state);
2611 if (ret < 0 || (size_t) ret >= buflen - len)
2612 return len;
2613 len += ret;
2614
2615 return len;
2616}
2617
2618
2619int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2620{
2621 int len = 0, ret;
2622 u32 pairwise = 0;
2623
2624 if (sm == NULL)
2625 return 0;
2626
2627 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2628
2629 /* dot11RSNAStatsEntry */
2630
2631 if (sm->wpa == WPA_VERSION_WPA) {
2632 if (sm->pairwise == WPA_CIPHER_CCMP)
2633 pairwise = WPA_CIPHER_SUITE_CCMP;
2634 else if (sm->pairwise == WPA_CIPHER_TKIP)
2635 pairwise = WPA_CIPHER_SUITE_TKIP;
2636 else if (sm->pairwise == WPA_CIPHER_WEP104)
2637 pairwise = WPA_CIPHER_SUITE_WEP104;
2638 else if (sm->pairwise == WPA_CIPHER_WEP40)
2639 pairwise = WPA_CIPHER_SUITE_WEP40;
2640 else if (sm->pairwise == WPA_CIPHER_NONE)
2641 pairwise = WPA_CIPHER_SUITE_NONE;
2642 } else if (sm->wpa == WPA_VERSION_WPA2) {
2643 if (sm->pairwise == WPA_CIPHER_CCMP)
2644 pairwise = RSN_CIPHER_SUITE_CCMP;
2645 else if (sm->pairwise == WPA_CIPHER_TKIP)
2646 pairwise = RSN_CIPHER_SUITE_TKIP;
2647 else if (sm->pairwise == WPA_CIPHER_WEP104)
2648 pairwise = RSN_CIPHER_SUITE_WEP104;
2649 else if (sm->pairwise == WPA_CIPHER_WEP40)
2650 pairwise = RSN_CIPHER_SUITE_WEP40;
2651 else if (sm->pairwise == WPA_CIPHER_NONE)
2652 pairwise = RSN_CIPHER_SUITE_NONE;
2653 } else
2654 return 0;
2655
2656 ret = os_snprintf(
2657 buf + len, buflen - len,
2658 /* TODO: dot11RSNAStatsIndex */
2659 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2660 "dot11RSNAStatsVersion=1\n"
2661 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2662 /* TODO: dot11RSNAStatsTKIPICVErrors */
2663 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 2664 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 2665 /* TODO: dot11RSNAStatsCCMPReplays */
2666 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2667 /* TODO: dot11RSNAStatsTKIPReplays */,
2668 MAC2STR(sm->addr),
2669 RSN_SUITE_ARG(pairwise),
2670 sm->dot11RSNAStatsTKIPLocalMICFailures,
2671 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2672 if (ret < 0 || (size_t) ret >= buflen - len)
2673 return len;
2674 len += ret;
2675
2676 /* Private MIB */
2677 ret = os_snprintf(buf + len, buflen - len,
2678 "hostapdWPAPTKState=%d\n"
2679 "hostapdWPAPTKGroupState=%d\n",
2680 sm->wpa_ptk_state,
2681 sm->wpa_ptk_group_state);
2682 if (ret < 0 || (size_t) ret >= buflen - len)
2683 return len;
2684 len += ret;
2685
2686 return len;
2687}
2688
2689
2690void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2691{
2692 if (wpa_auth)
2693 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2694}
2695
2696
2697int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2698{
2699 return sm && sm->pairwise_set;
2700}
2701
2702
ff36ff00
JM		 2703int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2704{
2705 return sm->pairwise;
2706}
2707
2708
6fc6879b
JM		 2709int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2710{
2711 if (sm == NULL)
2712 return -1;
2713 return sm->wpa_key_mgmt;
2714}
2715
2716
2717int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2718{
2719 if (sm == NULL)
2720 return 0;
2721 return sm->wpa;
2722}
2723
2724
2725int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2726 struct rsn_pmksa_cache_entry *entry)
2727{
2728 if (sm == NULL || sm->pmksa != entry)
2729 return -1;
2730 sm->pmksa = NULL;
2731 return 0;
2732}
2733
2734
2735struct rsn_pmksa_cache_entry *
2736wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2737{
2738 return sm ? sm->pmksa : NULL;
2739}
2740
2741
2742void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2743{
2744 if (sm)
2745 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2746}
2747
2748
2749const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2750{
2751 if (wpa_auth == NULL)
2752 return NULL;
2753 *len = wpa_auth->wpa_ie_len;
2754 return wpa_auth->wpa_ie;
2755}
2756
2757
2758int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2759 int session_timeout, struct eapol_state_machine *eapol)
2760{
cb465555
JM		 2761 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
2762 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 2763 return -1;
2764
4bb081f1
JM		 2765 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2766 sm->wpa_auth->addr, sm->addr, session_timeout,
2767 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 2768 return 0;
2769
2770 return -1;
2771}
2772
2773
2774int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2775 const u8 *pmk, size_t len, const u8 *sta_addr,
2776 int session_timeout,
2777 struct eapol_state_machine *eapol)
2778{
2779 if (wpa_auth == NULL)
2780 return -1;
2781
4bb081f1
JM		 2782 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2783 sta_addr, session_timeout, eapol,
2784 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 2785 return 0;
2786
2787 return -1;
2788}
2789
2790
2791static struct wpa_group *
2792wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2793{
2794 struct wpa_group *group;
2795
2796 if (wpa_auth == NULL || wpa_auth->group == NULL)
2797 return NULL;
2798
2799 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2800 vlan_id);
bdffdc5d 2801 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 2802 if (group == NULL)
2803 return NULL;
2804
2805 group->next = wpa_auth->group->next;
2806 wpa_auth->group->next = group;
2807
2808 return group;
2809}
2810
2811
2812int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2813{
2814 struct wpa_group *group;
2815
2816 if (sm == NULL || sm->wpa_auth == NULL)
2817 return 0;
2818
2819 group = sm->wpa_auth->group;
2820 while (group) {
2821 if (group->vlan_id == vlan_id)
2822 break;
2823 group = group->next;
2824 }
2825
2826 if (group == NULL) {
2827 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2828 if (group == NULL)
2829 return -1;
2830 }
2831
2832 if (sm->group == group)
2833 return 0;
2834
2835 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2836 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2837
2838 sm->group = group;
2839 return 0;
2840}
e4bf4db9
JM		 2841
2842
2843void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
2844 struct wpa_state_machine *sm, int ack)
2845{
2846 if (wpa_auth == NULL || sm == NULL)
2847 return;
2848 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
2849 " ack=%d", MAC2STR(sm->addr), ack);
2850 if (sm->pending_1_of_4_timeout && ack) {
2851 /*
2852 * Some deployed supplicant implementations update their SNonce
2853 * for each EAPOL-Key 2/4 message even within the same 4-way
2854 * handshake and then fail to use the first SNonce when
2855 * deriving the PTK. This results in unsuccessful 4-way
2856 * handshake whenever the relatively short initial timeout is
2857 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
2858 * around this by increasing the timeout now that we know that
2859 * the station has received the frame.
2860 */
2861 int timeout_ms = eapol_key_timeout_subseq;
2862 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
2863 "timeout by %u ms because of acknowledged frame",
2864 timeout_ms);
2865 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
2866 eloop_register_timeout(timeout_ms / 1000,
2867 (timeout_ms % 1000) * 1000,
2868 wpa_send_eapol_timeout, wpa_auth, sm);
2869 }
2870}
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