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wpa_s AP mode: Enable HT20 if driver supports it
[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
JM		 334static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
335 int vlan_id)
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;
368 wpa_group_sm_step(wpa_auth, group);
369 group->GInit = FALSE;
370 wpa_group_sm_step(wpa_auth, group);
371
372 return group;
373}
374
375
376/**
377 * wpa_init - Initialize WPA authenticator
378 * @addr: Authenticator address
379 * @conf: Configuration for WPA authenticator
a17df5fb 380 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 381 * Returns: Pointer to WPA authenticator data or %NULL on failure
382 */
383struct wpa_authenticator * wpa_init(const u8 *addr,
384 struct wpa_auth_config *conf,
385 struct wpa_auth_callbacks *cb)
386{
387 struct wpa_authenticator *wpa_auth;
388
389 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
390 if (wpa_auth == NULL)
391 return NULL;
392 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
393 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
394 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
395
396 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
397 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
398 os_free(wpa_auth);
399 return NULL;
400 }
401
402 wpa_auth->group = wpa_group_init(wpa_auth, 0);
403 if (wpa_auth->group == NULL) {
404 os_free(wpa_auth->wpa_ie);
405 os_free(wpa_auth);
406 return NULL;
407 }
408
4bb081f1
JM		 409 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
410 wpa_auth);
6fc6879b
JM		 411 if (wpa_auth->pmksa == NULL) {
412 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
413 os_free(wpa_auth->wpa_ie);
414 os_free(wpa_auth);
415 return NULL;
416 }
417
418#ifdef CONFIG_IEEE80211R
419 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
420 if (wpa_auth->ft_pmk_cache == NULL) {
421 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
422 os_free(wpa_auth->wpa_ie);
4bb081f1 423 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 424 os_free(wpa_auth);
425 return NULL;
426 }
427#endif /* CONFIG_IEEE80211R */
428
429 if (wpa_auth->conf.wpa_gmk_rekey) {
430 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
431 wpa_rekey_gmk, wpa_auth, NULL);
432 }
433
434 if (wpa_auth->conf.wpa_group_rekey) {
435 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
436 wpa_rekey_gtk, wpa_auth, NULL);
437 }
438
439 return wpa_auth;
440}
441
442
443/**
444 * wpa_deinit - Deinitialize WPA authenticator
445 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
446 */
447void wpa_deinit(struct wpa_authenticator *wpa_auth)
448{
449 struct wpa_group *group, *prev;
450
451 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
452 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
453
454#ifdef CONFIG_PEERKEY
455 while (wpa_auth->stsl_negotiations)
456 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
457#endif /* CONFIG_PEERKEY */
458
4bb081f1 459 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 460
461#ifdef CONFIG_IEEE80211R
462 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
463 wpa_auth->ft_pmk_cache = NULL;
464#endif /* CONFIG_IEEE80211R */
465
466 os_free(wpa_auth->wpa_ie);
467
468 group = wpa_auth->group;
469 while (group) {
470 prev = group;
471 group = group->next;
472 os_free(prev);
473 }
474
475 os_free(wpa_auth);
476}
477
478
479/**
480 * wpa_reconfig - Update WPA authenticator configuration
481 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
482 * @conf: Configuration for WPA authenticator
483 */
484int wpa_reconfig(struct wpa_authenticator *wpa_auth,
485 struct wpa_auth_config *conf)
486{
e6965d4e 487 struct wpa_group *group;
6fc6879b
JM		 488 if (wpa_auth == NULL)
489 return 0;
490
491 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 492 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
493 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
494 return -1;
495 }
496
e6965d4e
JM		 497 /*
498 * Reinitialize GTK to make sure it is suitable for the new
499 * configuration.
500 */
501 group = wpa_auth->group;
502 wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
503 group->GInit = TRUE;
504 wpa_group_sm_step(wpa_auth, group);
505 group->GInit = FALSE;
506 wpa_group_sm_step(wpa_auth, group);
507
6fc6879b
JM		 508 return 0;
509}
510
511
512struct wpa_state_machine *
513wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
514{
515 struct wpa_state_machine *sm;
516
517 sm = os_zalloc(sizeof(struct wpa_state_machine));
518 if (sm == NULL)
519 return NULL;
520 os_memcpy(sm->addr, addr, ETH_ALEN);
521
522 sm->wpa_auth = wpa_auth;
523 sm->group = wpa_auth->group;
524
525 return sm;
526}
527
528
6f9b5d16
JM		 529int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
530 struct wpa_state_machine *sm)
6fc6879b
JM		 531{
532 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 533 return -1;
6fc6879b
JM		 534
535#ifdef CONFIG_IEEE80211R
536 if (sm->ft_completed) {
537 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
538 "FT authentication already completed - do not "
539 "start 4-way handshake");
6f9b5d16 540 return 0;
6fc6879b
JM		 541 }
542#endif /* CONFIG_IEEE80211R */
543
544 if (sm->started) {
22a299ee 545 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 546 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 547 return wpa_sm_step(sm);
6fc6879b
JM		 548 }
549
550 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
551 "start authentication");
552 sm->started = 1;
553
554 sm->Init = TRUE;
e4a6ea1d 555 if (wpa_sm_step(sm) == 1)
6f9b5d16 556 return 1; /* should not really happen */
6fc6879b
JM		 557 sm->Init = FALSE;
558 sm->AuthenticationRequest = TRUE;
6f9b5d16 559 return wpa_sm_step(sm);
6fc6879b
JM		 560}
561
562
a8d05fca
JM		 563void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
564{
565 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
566 * reassociates back to the same AP while the previous entry for the
567 * STA has not yet been removed. */
568 if (sm == NULL)
569 return;
570
571 sm->wpa_key_mgmt = 0;
572}
573
574
6fc6879b
JM		 575static void wpa_free_sta_sm(struct wpa_state_machine *sm)
576{
2ade8ef2
JM		 577 if (sm->GUpdateStationKeys) {
578 sm->group->GKeyDoneStations--;
579 sm->GUpdateStationKeys = FALSE;
580 }
0f857f43
JM		 581#ifdef CONFIG_IEEE80211R
582 os_free(sm->assoc_resp_ftie);
583#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 584 os_free(sm->last_rx_eapol_key);
585 os_free(sm->wpa_ie);
586 os_free(sm);
587}
588
589
590void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
591{
592 if (sm == NULL)
593 return;
594
595 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
596 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
597 "strict rekeying - force GTK rekey since STA "
598 "is leaving");
599 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
600 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
601 NULL);
602 }
603
604 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 605 sm->pending_1_of_4_timeout = 0;
6fc6879b 606 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 607 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 608 if (sm->in_step_loop) {
609 /* Must not free state machine while wpa_sm_step() is running.
610 * Freeing will be completed in the end of wpa_sm_step(). */
611 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
612 "machine deinit for " MACSTR, MAC2STR(sm->addr));
613 sm->pending_deinit = 1;
614 } else
615 wpa_free_sta_sm(sm);
616}
617
618
619static void wpa_request_new_ptk(struct wpa_state_machine *sm)
620{
621 if (sm == NULL)
622 return;
623
624 sm->PTKRequest = TRUE;
625 sm->PTK_valid = 0;
626}
627
628
22a299ee
JM		 629static int wpa_replay_counter_valid(struct wpa_state_machine *sm,
630 const u8 *replay_counter)
631{
632 int i;
633 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
634 if (!sm->key_replay[i].valid)
635 break;
636 if (os_memcmp(replay_counter, sm->key_replay[i].counter,
637 WPA_REPLAY_COUNTER_LEN) == 0)
638 return 1;
639 }
640 return 0;
641}
642
643
0f857f43
JM		 644#ifdef CONFIG_IEEE80211R
645static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
646 struct wpa_state_machine *sm,
647 struct wpa_eapol_ie_parse *kde)
648{
649 struct wpa_ie_data ie;
650 struct rsn_mdie *mdie;
651
652 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
653 ie.num_pmkid != 1 || ie.pmkid == NULL) {
654 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
655 "FT 4-way handshake message 2/4");
656 return -1;
657 }
658
659 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
660 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
661 sm->sup_pmk_r1_name, PMKID_LEN);
662
663 if (!kde->mdie || !kde->ftie) {
664 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
665 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
666 return -1;
667 }
668
669 mdie = (struct rsn_mdie *) (kde->mdie + 2);
670 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
671 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
672 MOBILITY_DOMAIN_ID_LEN) != 0) {
673 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
674 return -1;
675 }
676
677 if (sm->assoc_resp_ftie &&
678 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
679 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
680 2 + sm->assoc_resp_ftie[1]) != 0)) {
681 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
682 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
683 kde->ftie, kde->ftie_len);
684 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
685 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
686 return -1;
687 }
688
689 return 0;
690}
691#endif /* CONFIG_IEEE80211R */
692
693
6fc6879b
JM		 694void wpa_receive(struct wpa_authenticator *wpa_auth,
695 struct wpa_state_machine *sm,
696 u8 *data, size_t data_len)
697{
698 struct ieee802_1x_hdr *hdr;
699 struct wpa_eapol_key *key;
700 u16 key_info, key_data_length;
701 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
702 SMK_M1, SMK_M3, SMK_ERROR } msg;
703 char *msgtxt;
704 struct wpa_eapol_ie_parse kde;
26e23750 705 int ft;
1566ec46
JM		 706 const u8 *eapol_key_ie;
707 size_t eapol_key_ie_len;
6fc6879b
JM		 708
709 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
710 return;
711
712 if (data_len < sizeof(*hdr) + sizeof(*key))
713 return;
714
715 hdr = (struct ieee802_1x_hdr *) data;
716 key = (struct wpa_eapol_key *) (hdr + 1);
717 key_info = WPA_GET_BE16(key->key_info);
718 key_data_length = WPA_GET_BE16(key->key_data_length);
719 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
720 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
721 "key_data overflow (%d > %lu)",
722 key_data_length,
723 (unsigned long) (data_len - sizeof(*hdr) -
724 sizeof(*key)));
725 return;
726 }
727
f8e96eb6
JM		 728 if (sm->wpa == WPA_VERSION_WPA2) {
729 if (key->type != EAPOL_KEY_TYPE_RSN) {
730 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
731 "unexpected type %d in RSN mode",
732 key->type);
733 return;
734 }
735 } else {
736 if (key->type != EAPOL_KEY_TYPE_WPA) {
737 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
738 "unexpected type %d in WPA mode",
739 key->type);
740 return;
741 }
742 }
743
bc8318ac
JM		 744 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
745 WPA_NONCE_LEN);
746 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
747 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
748
6fc6879b
JM		 749 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
750 * are set */
751
752 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
753 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
754 if (key_info & WPA_KEY_INFO_ERROR) {
755 msg = SMK_ERROR;
756 msgtxt = "SMK Error";
757 } else {
758 msg = SMK_M1;
759 msgtxt = "SMK M1";
760 }
761 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
762 msg = SMK_M3;
763 msgtxt = "SMK M3";
764 } else if (key_info & WPA_KEY_INFO_REQUEST) {
765 msg = REQUEST;
766 msgtxt = "Request";
767 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
768 msg = GROUP_2;
769 msgtxt = "2/2 Group";
770 } else if (key_data_length == 0) {
771 msg = PAIRWISE_4;
772 msgtxt = "4/4 Pairwise";
773 } else {
774 msg = PAIRWISE_2;
775 msgtxt = "2/4 Pairwise";
776 }
777
778 /* TODO: key_info type validation for PeerKey */
779 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
780 msg == GROUP_2) {
781 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
782 if (sm->pairwise == WPA_CIPHER_CCMP) {
783 if (wpa_use_aes_cmac(sm) &&
784 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
785 wpa_auth_logger(wpa_auth, sm->addr,
786 LOGGER_WARNING,
787 "advertised support for "
788 "AES-128-CMAC, but did not "
789 "use it");
790 return;
791 }
792
793 if (!wpa_use_aes_cmac(sm) &&
794 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
795 wpa_auth_logger(wpa_auth, sm->addr,
796 LOGGER_WARNING,
797 "did not use HMAC-SHA1-AES "
798 "with CCMP");
799 return;
800 }
801 }
802 }
803
804 if (key_info & WPA_KEY_INFO_REQUEST) {
805 if (sm->req_replay_counter_used &&
806 os_memcmp(key->replay_counter, sm->req_replay_counter,
807 WPA_REPLAY_COUNTER_LEN) <= 0) {
808 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
809 "received EAPOL-Key request with "
810 "replayed counter");
811 return;
812 }
813 }
814
815 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
22a299ee
JM		 816 !wpa_replay_counter_valid(sm, key->replay_counter)) {
817 int i;
6fc6879b
JM		 818 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
819 "received EAPOL-Key %s with unexpected "
820 "replay counter", msgtxt);
22a299ee
JM		 821 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
822 if (!sm->key_replay[i].valid)
823 break;
824 wpa_hexdump(MSG_DEBUG, "pending replay counter",
825 sm->key_replay[i].counter,
826 WPA_REPLAY_COUNTER_LEN);
827 }
6fc6879b
JM		 828 wpa_hexdump(MSG_DEBUG, "received replay counter",
829 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
830 return;
831 }
832
833 switch (msg) {
834 case PAIRWISE_2:
835 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
836 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
837 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
838 "received EAPOL-Key msg 2/4 in "
839 "invalid state (%d) - dropped",
840 sm->wpa_ptk_state);
841 return;
842 }
bbb921da 843 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 844 if (sm->group->reject_4way_hs_for_entropy) {
845 /*
846 * The system did not have enough entropy to generate
847 * strong random numbers. Reject the first 4-way
848 * handshake(s) and collect some entropy based on the
849 * information from it. Once enough entropy is
850 * available, the next atempt will trigger GMK/Key
851 * Counter update and the station will be allowed to
852 * continue.
853 */
854 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
855 "collect more entropy for random number "
856 "generation");
857 sm->group->reject_4way_hs_for_entropy = FALSE;
858 random_mark_pool_ready();
859 sm->group->first_sta_seen = FALSE;
860 wpa_sta_disconnect(wpa_auth, sm->addr);
861 return;
862 }
1566ec46
JM		 863 if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length,
864 &kde) < 0) {
865 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
866 "received EAPOL-Key msg 2/4 with "
867 "invalid Key Data contents");
868 return;
869 }
870 if (kde.rsn_ie) {
871 eapol_key_ie = kde.rsn_ie;
872 eapol_key_ie_len = kde.rsn_ie_len;
873 } else {
874 eapol_key_ie = kde.wpa_ie;
875 eapol_key_ie_len = kde.wpa_ie_len;
876 }
26e23750
JM		 877 ft = sm->wpa == WPA_VERSION_WPA2 &&
878 wpa_key_mgmt_ft(sm->wpa_key_mgmt);
6fc6879b 879 if (sm->wpa_ie == NULL ||
26e23750
JM		 880 wpa_compare_rsn_ie(ft,
881 sm->wpa_ie, sm->wpa_ie_len,
1566ec46 882 eapol_key_ie, eapol_key_ie_len)) {
6fc6879b
JM		 883 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
884 "WPA IE from (Re)AssocReq did not "
885 "match with msg 2/4");
886 if (sm->wpa_ie) {
887 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
888 sm->wpa_ie, sm->wpa_ie_len);
889 }
890 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1566ec46 891 eapol_key_ie, eapol_key_ie_len);
6fc6879b
JM		 892 /* MLME-DEAUTHENTICATE.request */
893 wpa_sta_disconnect(wpa_auth, sm->addr);
894 return;
895 }
26e23750 896#ifdef CONFIG_IEEE80211R
0f857f43
JM		 897 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
898 wpa_sta_disconnect(wpa_auth, sm->addr);
899 return;
26e23750
JM		 900 }
901#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 902 break;
903 case PAIRWISE_4:
904 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
905 !sm->PTK_valid) {
906 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
907 "received EAPOL-Key msg 4/4 in "
908 "invalid state (%d) - dropped",
909 sm->wpa_ptk_state);
910 return;
911 }
912 break;
913 case GROUP_2:
914 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
915 || !sm->PTK_valid) {
916 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
917 "received EAPOL-Key msg 2/2 in "
918 "invalid state (%d) - dropped",
919 sm->wpa_ptk_group_state);
920 return;
921 }
922 break;
923#ifdef CONFIG_PEERKEY
924 case SMK_M1:
925 case SMK_M3:
926 case SMK_ERROR:
927 if (!wpa_auth->conf.peerkey) {
928 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
929 "PeerKey use disabled - ignoring message");
930 return;
931 }
932 if (!sm->PTK_valid) {
933 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
934 "received EAPOL-Key msg SMK in "
935 "invalid state - dropped");
936 return;
937 }
938 break;
939#else /* CONFIG_PEERKEY */
940 case SMK_M1:
941 case SMK_M3:
942 case SMK_ERROR:
943 return; /* STSL disabled - ignore SMK messages */
944#endif /* CONFIG_PEERKEY */
945 case REQUEST:
946 break;
947 }
948
949 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
950 "received EAPOL-Key frame (%s)", msgtxt);
951
952 if (key_info & WPA_KEY_INFO_ACK) {
953 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
954 "received invalid EAPOL-Key: Key Ack set");
955 return;
956 }
957
958 if (!(key_info & WPA_KEY_INFO_MIC)) {
959 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
960 "received invalid EAPOL-Key: Key MIC not set");
961 return;
962 }
963
964 sm->MICVerified = FALSE;
965 if (sm->PTK_valid) {
966 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
967 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
968 "received EAPOL-Key with invalid MIC");
969 return;
970 }
971 sm->MICVerified = TRUE;
972 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 973 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 974 }
975
976 if (key_info & WPA_KEY_INFO_REQUEST) {
977 if (sm->MICVerified) {
978 sm->req_replay_counter_used = 1;
979 os_memcpy(sm->req_replay_counter, key->replay_counter,
980 WPA_REPLAY_COUNTER_LEN);
981 } else {
982 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
983 "received EAPOL-Key request with "
984 "invalid MIC");
985 return;
986 }
987
988 /*
989 * TODO: should decrypt key data field if encryption was used;
990 * even though MAC address KDE is not normally encrypted,
991 * supplicant is allowed to encrypt it.
992 */
993 if (msg == SMK_ERROR) {
994#ifdef CONFIG_PEERKEY
995 wpa_smk_error(wpa_auth, sm, key);
996#endif /* CONFIG_PEERKEY */
997 return;
998 } else if (key_info & WPA_KEY_INFO_ERROR) {
999 /* Supplicant reported a Michael MIC error */
1000 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1001 "received EAPOL-Key Error Request "
1002 "(STA detected Michael MIC failure)");
1003 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
1004 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
1005 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
1006 /* Error report is not a request for a new key
1007 * handshake, but since Authenticator may do it, let's
1008 * change the keys now anyway. */
1009 wpa_request_new_ptk(sm);
1010 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1011 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1012 "received EAPOL-Key Request for new "
1013 "4-Way Handshake");
1014 wpa_request_new_ptk(sm);
1015#ifdef CONFIG_PEERKEY
1016 } else if (msg == SMK_M1) {
1017 wpa_smk_m1(wpa_auth, sm, key);
1018#endif /* CONFIG_PEERKEY */
1019 } else if (key_data_length > 0 &&
1020 wpa_parse_kde_ies((const u8 *) (key + 1),
1021 key_data_length, &kde) == 0 &&
1022 kde.mac_addr) {
1023 } else {
1024 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1025 "received EAPOL-Key Request for GTK "
1026 "rekeying");
1027 /* FIX: why was this triggering PTK rekeying for the
1028 * STA that requested Group Key rekeying?? */
1029 /* wpa_request_new_ptk(sta->wpa_sm); */
1030 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1031 wpa_rekey_gtk(wpa_auth, NULL);
1032 }
1033 } else {
22a299ee
JM		 1034 /* Do not allow the same key replay counter to be reused. This
1035 * does also invalidate all other pending replay counters if
1036 * retransmissions were used, i.e., we will only process one of
1037 * the pending replies and ignore rest if more than one is
1038 * received. */
1039 sm->key_replay[0].valid = FALSE;
6fc6879b
JM		 1040 }
1041
1042#ifdef CONFIG_PEERKEY
1043 if (msg == SMK_M3) {
1044 wpa_smk_m3(wpa_auth, sm, key);
1045 return;
1046 }
1047#endif /* CONFIG_PEERKEY */
1048
1049 os_free(sm->last_rx_eapol_key);
1050 sm->last_rx_eapol_key = os_malloc(data_len);
1051 if (sm->last_rx_eapol_key == NULL)
1052 return;
1053 os_memcpy(sm->last_rx_eapol_key, data, data_len);
1054 sm->last_rx_eapol_key_len = data_len;
1055
1056 sm->EAPOLKeyReceived = TRUE;
1057 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1058 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1059 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1060 wpa_sm_step(sm);
1061}
1062
1063
3c7302c2
JM		 1064static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1065 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1066{
5cb9d5c3
JM		 1067 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1068 u8 *pos;
3c7302c2 1069 int ret = 0;
6fc6879b 1070
5cb9d5c3
JM		 1071 /* GTK = PRF-X(GMK, "Group key expansion",
1072 * AA || GNonce || Time || random data)
1073 * The example described in the IEEE 802.11 standard uses only AA and
1074 * GNonce as inputs here. Add some more entropy since this derivation
1075 * is done only at the Authenticator and as such, does not need to be
1076 * exactly same.
1077 */
6fc6879b
JM		 1078 os_memcpy(data, addr, ETH_ALEN);
1079 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1080 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1081 wpa_get_ntp_timestamp(pos);
1082 pos += 8;
3642c431 1083 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1084 ret = -1;
6fc6879b 1085
56586197 1086#ifdef CONFIG_IEEE80211W
5cb9d5c3 1087 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1088#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1089 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1090 < 0)
1091 ret = -1;
56586197 1092#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1093
1094 return ret;
6fc6879b
JM		 1095}
1096
1097
1098static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1099{
1100 struct wpa_authenticator *wpa_auth = eloop_ctx;
1101 struct wpa_state_machine *sm = timeout_ctx;
1102
e4bf4db9 1103 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1104 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1105 sm->TimeoutEvt = TRUE;
1106 wpa_sm_step(sm);
1107}
1108
1109
1110void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1111 struct wpa_state_machine *sm, int key_info,
1112 const u8 *key_rsc, const u8 *nonce,
1113 const u8 *kde, size_t kde_len,
1114 int keyidx, int encr, int force_version)
1115{
1116 struct ieee802_1x_hdr *hdr;
1117 struct wpa_eapol_key *key;
1118 size_t len;
1119 int alg;
1120 int key_data_len, pad_len = 0;
1121 u8 *buf, *pos;
1122 int version, pairwise;
22a299ee 1123 int i;
6fc6879b
JM		 1124
1125 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
1126
1127 if (force_version)
1128 version = force_version;
1129 else if (wpa_use_aes_cmac(sm))
1130 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1131 else if (sm->pairwise == WPA_CIPHER_CCMP)
1132 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1133 else
1134 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1135
1136 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1137
1138 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1139 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1140 "encr=%d)",
1141 version,
1142 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1143 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1144 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1145 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1146 pairwise, (unsigned long) kde_len, keyidx, encr);
1147
1148 key_data_len = kde_len;
1149
1150 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1151 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1152 pad_len = key_data_len % 8;
1153 if (pad_len)
1154 pad_len = 8 - pad_len;
1155 key_data_len += pad_len + 8;
1156 }
1157
1158 len += key_data_len;
1159
1160 hdr = os_zalloc(len);
1161 if (hdr == NULL)
1162 return;
1163 hdr->version = wpa_auth->conf.eapol_version;
1164 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1165 hdr->length = host_to_be16(len - sizeof(*hdr));
1166 key = (struct wpa_eapol_key *) (hdr + 1);
1167
1168 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1169 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1170 key_info |= version;
1171 if (encr && sm->wpa == WPA_VERSION_WPA2)
1172 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1173 if (sm->wpa != WPA_VERSION_WPA2)
1174 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1175 WPA_PUT_BE16(key->key_info, key_info);
1176
1177 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1178 switch (alg) {
1179 case WPA_CIPHER_CCMP:
1180 WPA_PUT_BE16(key->key_length, 16);
1181 break;
1182 case WPA_CIPHER_TKIP:
1183 WPA_PUT_BE16(key->key_length, 32);
1184 break;
1185 case WPA_CIPHER_WEP40:
1186 WPA_PUT_BE16(key->key_length, 5);
1187 break;
1188 case WPA_CIPHER_WEP104:
1189 WPA_PUT_BE16(key->key_length, 13);
1190 break;
1191 }
1192 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1193 WPA_PUT_BE16(key->key_length, 0);
1194
1195 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1196 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1197 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1198 os_memcpy(sm->key_replay[i].counter,
1199 sm->key_replay[i - 1].counter,
1200 WPA_REPLAY_COUNTER_LEN);
1201 }
1202 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1203 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1204 WPA_REPLAY_COUNTER_LEN);
22a299ee 1205 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1206
1207 if (nonce)
1208 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1209
1210 if (key_rsc)
1211 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1212
1213 if (kde && !encr) {
1214 os_memcpy(key + 1, kde, kde_len);
1215 WPA_PUT_BE16(key->key_data_length, kde_len);
1216 } else if (encr && kde) {
1217 buf = os_zalloc(key_data_len);
1218 if (buf == NULL) {
1219 os_free(hdr);
1220 return;
1221 }
1222 pos = buf;
1223 os_memcpy(pos, kde, kde_len);
1224 pos += kde_len;
1225
1226 if (pad_len)
1227 *pos++ = 0xdd;
1228
1229 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1230 buf, key_data_len);
1231 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1232 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1233 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1234 (u8 *) (key + 1))) {
1235 os_free(hdr);
1236 os_free(buf);
1237 return;
1238 }
1239 WPA_PUT_BE16(key->key_data_length, key_data_len);
1240 } else {
1241 u8 ek[32];
1242 os_memcpy(key->key_iv,
1243 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1244 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1245 os_memcpy(ek, key->key_iv, 16);
1246 os_memcpy(ek + 16, sm->PTK.kek, 16);
1247 os_memcpy(key + 1, buf, key_data_len);
1248 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1249 WPA_PUT_BE16(key->key_data_length, key_data_len);
1250 }
1251 os_free(buf);
1252 }
1253
1254 if (key_info & WPA_KEY_INFO_MIC) {
1255 if (!sm->PTK_valid) {
1256 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1257 "PTK not valid when sending EAPOL-Key "
1258 "frame");
1259 os_free(hdr);
1260 return;
1261 }
1262 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1263 key->key_mic);
1264 }
1265
1266 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1267 1);
1268 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1269 sm->pairwise_set);
1270 os_free(hdr);
1271}
1272
1273
1274static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1275 struct wpa_state_machine *sm, int key_info,
1276 const u8 *key_rsc, const u8 *nonce,
1277 const u8 *kde, size_t kde_len,
1278 int keyidx, int encr)
1279{
1280 int timeout_ms;
1281 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
bae61562 1282 int ctr;
6fc6879b
JM		 1283
1284 if (sm == NULL)
1285 return;
1286
1287 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1288 keyidx, encr, 0);
1289
bae61562 1290 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1291 if (ctr == 1 && wpa_auth->conf.tx_status)
bae61562
JM		 1292 timeout_ms = eapol_key_timeout_first;
1293 else
1294 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1295 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1296 sm->pending_1_of_4_timeout = 1;
1297 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1298 "counter %d)", timeout_ms, ctr);
6fc6879b
JM		 1299 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1300 wpa_send_eapol_timeout, wpa_auth, sm);
1301}
1302
1303
1304static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1305{
1306 struct ieee802_1x_hdr *hdr;
1307 struct wpa_eapol_key *key;
1308 u16 key_info;
1309 int ret = 0;
1310 u8 mic[16];
1311
1312 if (data_len < sizeof(*hdr) + sizeof(*key))
1313 return -1;
1314
1315 hdr = (struct ieee802_1x_hdr *) data;
1316 key = (struct wpa_eapol_key *) (hdr + 1);
1317 key_info = WPA_GET_BE16(key->key_info);
1318 os_memcpy(mic, key->key_mic, 16);
1319 os_memset(key->key_mic, 0, 16);
1320 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1321 data, data_len, key->key_mic) ||
1322 os_memcmp(mic, key->key_mic, 16) != 0)
1323 ret = -1;
1324 os_memcpy(key->key_mic, mic, 16);
1325 return ret;
1326}
1327
1328
1329void wpa_remove_ptk(struct wpa_state_machine *sm)
1330{
1331 sm->PTK_valid = FALSE;
1332 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
26083221 1333 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
6fc6879b 1334 sm->pairwise_set = FALSE;
581a8cde 1335 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1336}
1337
1338
6f9b5d16 1339int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
6fc6879b 1340{
5d22a1d5
JM		 1341 int remove_ptk = 1;
1342
6fc6879b 1343 if (sm == NULL)
6f9b5d16 1344 return -1;
6fc6879b
JM		 1345
1346 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1347 "event %d notification", event);
1348
1349 switch (event) {
1350 case WPA_AUTH:
1351 case WPA_ASSOC:
1352 break;
1353 case WPA_DEAUTH:
1354 case WPA_DISASSOC:
1355 sm->DeauthenticationRequest = TRUE;
1356 break;
1357 case WPA_REAUTH:
1358 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1359 if (!sm->started) {
1360 /*
1361 * When using WPS, we may end up here if the STA
1362 * manages to re-associate without the previous STA
1363 * entry getting removed. Consequently, we need to make
1364 * sure that the WPA state machines gets initialized
1365 * properly at this point.
1366 */
1367 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1368 "started - initialize now");
1369 sm->started = 1;
1370 sm->Init = TRUE;
1371 if (wpa_sm_step(sm) == 1)
1372 return 1; /* should not really happen */
1373 sm->Init = FALSE;
1374 sm->AuthenticationRequest = TRUE;
1375 break;
1376 }
9663596f
JM		 1377 if (sm->GUpdateStationKeys) {
1378 /*
1379 * Reauthentication cancels the pending group key
1380 * update for this STA.
1381 */
1382 sm->group->GKeyDoneStations--;
1383 sm->GUpdateStationKeys = FALSE;
1384 sm->PtkGroupInit = TRUE;
1385 }
6fc6879b
JM		 1386 sm->ReAuthenticationRequest = TRUE;
1387 break;
1388 case WPA_ASSOC_FT:
1389#ifdef CONFIG_IEEE80211R
81a658d7
JM		 1390 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1391 "after association");
1392 wpa_ft_install_ptk(sm);
1393
6fc6879b
JM		 1394 /* Using FT protocol, not WPA auth state machine */
1395 sm->ft_completed = 1;
6f9b5d16 1396 return 0;
6fc6879b
JM		 1397#else /* CONFIG_IEEE80211R */
1398 break;
1399#endif /* CONFIG_IEEE80211R */
1400 }
1401
1402#ifdef CONFIG_IEEE80211R
1403 sm->ft_completed = 0;
1404#endif /* CONFIG_IEEE80211R */
1405
5d22a1d5
JM		 1406#ifdef CONFIG_IEEE80211W
1407 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1408 remove_ptk = 0;
1409#endif /* CONFIG_IEEE80211W */
6fc6879b 1410
5d22a1d5
JM		 1411 if (remove_ptk) {
1412 sm->PTK_valid = FALSE;
1413 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1414
1415 if (event != WPA_REAUTH_EAPOL)
1416 wpa_remove_ptk(sm);
1417 }
6fc6879b 1418
6f9b5d16 1419 return wpa_sm_step(sm);
6fc6879b
JM		 1420}
1421
1422
71934751 1423static enum wpa_alg wpa_alg_enum(int alg)
6fc6879b
JM		 1424{
1425 switch (alg) {
1426 case WPA_CIPHER_CCMP:
89d39d9d 1427 return WPA_ALG_CCMP;
6fc6879b 1428 case WPA_CIPHER_TKIP:
89d39d9d 1429 return WPA_ALG_TKIP;
6fc6879b
JM		 1430 case WPA_CIPHER_WEP104:
1431 case WPA_CIPHER_WEP40:
89d39d9d 1432 return WPA_ALG_WEP;
6fc6879b 1433 default:
89d39d9d 1434 return WPA_ALG_NONE;
6fc6879b
JM		 1435 }
1436}
1437
1438
1439SM_STATE(WPA_PTK, INITIALIZE)
1440{
1441 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1442 if (sm->Init) {
1443 /* Init flag is not cleared here, so avoid busy
1444 * loop by claiming nothing changed. */
1445 sm->changed = FALSE;
1446 }
1447
1448 sm->keycount = 0;
1449 if (sm->GUpdateStationKeys)
1450 sm->group->GKeyDoneStations--;
1451 sm->GUpdateStationKeys = FALSE;
1452 if (sm->wpa == WPA_VERSION_WPA)
1453 sm->PInitAKeys = FALSE;
1454 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1455 * Local AA > Remote AA)) */) {
1456 sm->Pair = TRUE;
1457 }
1458 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1459 wpa_remove_ptk(sm);
1460 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1461 sm->TimeoutCtr = 0;
56586197 1462 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1463 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1464 WPA_EAPOL_authorized, 0);
1465 }
1466}
1467
1468
1469SM_STATE(WPA_PTK, DISCONNECT)
1470{
1471 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1472 sm->Disconnect = FALSE;
1473 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1474}
1475
1476
1477SM_STATE(WPA_PTK, DISCONNECTED)
1478{
1479 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1480 sm->DeauthenticationRequest = FALSE;
1481}
1482
1483
1484SM_STATE(WPA_PTK, AUTHENTICATION)
1485{
1486 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1487 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1488 sm->PTK_valid = FALSE;
1489 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1490 1);
1491 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1492 sm->AuthenticationRequest = FALSE;
1493}
1494
1495
1bdb7ab3
JM		 1496static void wpa_group_first_station(struct wpa_authenticator *wpa_auth,
1497 struct wpa_group *group)
1498{
1499 /*
1500 * System has run bit further than at the time hostapd was started
1501 * potentially very early during boot up. This provides better chances
1502 * of collecting more randomness on embedded systems. Re-initialize the
1503 * GMK and Counter here to improve their strength if there was not
1504 * enough entropy available immediately after system startup.
1505 */
1506 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1507 "station");
08704cd8
JM		 1508 if (random_pool_ready() != 1) {
1509 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1510 "to proceed - reject first 4-way handshake");
1511 group->reject_4way_hs_for_entropy = TRUE;
1512 }
1bdb7ab3
JM		 1513 wpa_group_init_gmk_and_counter(wpa_auth, group);
1514 wpa_gtk_update(wpa_auth, group);
1515 wpa_group_config_group_keys(wpa_auth, group);
1516}
1517
1518
6fc6879b
JM		 1519SM_STATE(WPA_PTK, AUTHENTICATION2)
1520{
1521 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3
JM		 1522
1523 if (!sm->group->first_sta_seen) {
1524 wpa_group_first_station(sm->wpa_auth, sm->group);
1525 sm->group->first_sta_seen = TRUE;
1526 }
1527
6fc6879b 1528 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
bc8318ac
JM		 1529 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1530 WPA_NONCE_LEN);
6fc6879b
JM		 1531 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1532 sm->ReAuthenticationRequest = FALSE;
1533 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1534 * logical place than INITIALIZE since AUTHENTICATION2 can be
1535 * re-entered on ReAuthenticationRequest without going through
1536 * INITIALIZE. */
1537 sm->TimeoutCtr = 0;
1538}
1539
1540
1541SM_STATE(WPA_PTK, INITPMK)
1542{
1543 u8 msk[2 * PMK_LEN];
1544 size_t len = 2 * PMK_LEN;
1545
1546 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1547#ifdef CONFIG_IEEE80211R
1548 sm->xxkey_len = 0;
1549#endif /* CONFIG_IEEE80211R */
1550 if (sm->pmksa) {
1551 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1552 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1553 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1554 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1555 "(len=%lu)", (unsigned long) len);
1556 os_memcpy(sm->PMK, msk, PMK_LEN);
1557#ifdef CONFIG_IEEE80211R
1558 if (len >= 2 * PMK_LEN) {
1559 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1560 sm->xxkey_len = PMK_LEN;
1561 }
1562#endif /* CONFIG_IEEE80211R */
1563 } else {
1564 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1565 }
1566
1567 sm->req_replay_counter_used = 0;
1568 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1569 * will break reauthentication since EAPOL state machines may not be
1570 * get into AUTHENTICATING state that clears keyRun before WPA state
1571 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1572 * state and takes PMK from the previously used AAA Key. This will
1573 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1574 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1575 * be good workaround for this issue. */
1576 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1577}
1578
1579
1580SM_STATE(WPA_PTK, INITPSK)
1581{
1582 const u8 *psk;
1583 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1584 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1585 if (psk) {
1586 os_memcpy(sm->PMK, psk, PMK_LEN);
1587#ifdef CONFIG_IEEE80211R
1588 os_memcpy(sm->xxkey, psk, PMK_LEN);
1589 sm->xxkey_len = PMK_LEN;
1590#endif /* CONFIG_IEEE80211R */
1591 }
1592 sm->req_replay_counter_used = 0;
1593}
1594
1595
1596SM_STATE(WPA_PTK, PTKSTART)
1597{
1598 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1599 size_t pmkid_len = 0;
1600
1601 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1602 sm->PTKRequest = FALSE;
1603 sm->TimeoutEvt = FALSE;
bae61562
JM		 1604
1605 sm->TimeoutCtr++;
1606 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1607 /* No point in sending the EAPOL-Key - we will disconnect
1608 * immediately following this. */
1609 return;
1610 }
1611
6fc6879b
JM		 1612 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1613 "sending 1/4 msg of 4-Way Handshake");
1614 /*
1615 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1616 * one possible PSK for this STA.
1617 */
1618 if (sm->wpa == WPA_VERSION_WPA2 &&
56586197 1619 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1620 pmkid = buf;
1621 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1622 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1623 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1624 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1625 if (sm->pmksa)
1626 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1627 sm->pmksa->pmkid, PMKID_LEN);
1628 else {
1629 /*
1630 * Calculate PMKID since no PMKSA cache entry was
1631 * available with pre-calculated PMKID.
1632 */
1633 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
56586197
JM		 1634 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1635 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1636 }
1637 }
1638 wpa_send_eapol(sm->wpa_auth, sm,
1639 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1640 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 1641}
1642
1643
1644static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1645 struct wpa_ptk *ptk)
1646{
c0a61908 1647 size_t ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
6fc6879b 1648#ifdef CONFIG_IEEE80211R
56586197 1649 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
c0a61908 1650 return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
6fc6879b
JM		 1651#endif /* CONFIG_IEEE80211R */
1652
1653 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1654 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
c0a61908 1655 (u8 *) ptk, ptk_len,
56586197 1656 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1657
1658 return 0;
1659}
1660
1661
1662SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1663{
1664 struct wpa_ptk PTK;
1665 int ok = 0;
1666 const u8 *pmk = NULL;
1667
1668 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1669 sm->EAPOLKeyReceived = FALSE;
1670
1671 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1672 * WPA-PSK: iterate through possible PSKs and select the one matching
1673 * the packet */
1674 for (;;) {
56586197 1675 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1676 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1677 if (pmk == NULL)
1678 break;
1679 } else
1680 pmk = sm->PMK;
1681
1682 wpa_derive_ptk(sm, pmk, &PTK);
1683
1684 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1685 sm->last_rx_eapol_key_len) == 0) {
1686 ok = 1;
1687 break;
1688 }
1689
56586197 1690 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 1691 break;
1692 }
1693
1694 if (!ok) {
1695 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1696 "invalid MIC in msg 2/4 of 4-Way Handshake");
1697 return;
1698 }
1699
26e23750
JM		 1700#ifdef CONFIG_IEEE80211R
1701 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1702 /*
1703 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
1704 * with the value we derived.
1705 */
1706 if (os_memcmp(sm->sup_pmk_r1_name, sm->pmk_r1_name,
1707 WPA_PMK_NAME_LEN) != 0) {
1708 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1709 "PMKR1Name mismatch in FT 4-way "
1710 "handshake");
1711 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
1712 "Supplicant",
1713 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
1714 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
1715 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
1716 return;
1717 }
1718 }
1719#endif /* CONFIG_IEEE80211R */
1720
e4bf4db9 1721 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1722 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1723
56586197 1724 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1725 /* PSK may have changed from the previous choice, so update
1726 * state machine data based on whatever PSK was selected here.
1727 */
1728 os_memcpy(sm->PMK, pmk, PMK_LEN);
1729 }
1730
1731 sm->MICVerified = TRUE;
1732
1733 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1734 sm->PTK_valid = TRUE;
1735}
1736
1737
1738SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1739{
1740 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1741 sm->TimeoutCtr = 0;
1742}
1743
1744
1745#ifdef CONFIG_IEEE80211W
1746
1747static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1748{
1749 if (sm->mgmt_frame_prot) {
1750 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1751 }
1752
1753 return 0;
1754}
1755
1756
1757static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1758{
1759 struct wpa_igtk_kde igtk;
1760 struct wpa_group *gsm = sm->group;
1761
1762 if (!sm->mgmt_frame_prot)
1763 return pos;
1764
1765 igtk.keyid[0] = gsm->GN_igtk;
1766 igtk.keyid[1] = 0;
7b1080da
JM		 1767 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
1768 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn) < 0)
6fc6879b
JM		 1769 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1770 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1771 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1772 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1773
1774 return pos;
1775}
1776
1777#else /* CONFIG_IEEE80211W */
1778
1779static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1780{
1781 return 0;
1782}
1783
1784
1785static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1786{
1787 return pos;
1788}
1789
1790#endif /* CONFIG_IEEE80211W */
1791
1792
1793SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1794{
1795 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1796 size_t gtk_len, kde_len;
1797 struct wpa_group *gsm = sm->group;
1798 u8 *wpa_ie;
1799 int wpa_ie_len, secure, keyidx, encr = 0;
1800
1801 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1802 sm->TimeoutEvt = FALSE;
bae61562
JM		 1803
1804 sm->TimeoutCtr++;
1805 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1806 /* No point in sending the EAPOL-Key - we will disconnect
1807 * immediately following this. */
1808 return;
1809 }
1810
86dfabb8
JM		 1811 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
1812 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 1813 */
1814 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1815 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 1816 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 1817 wpa_ie = sm->wpa_auth->wpa_ie;
1818 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1819 if (sm->wpa == WPA_VERSION_WPA &&
1820 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1821 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1822 /* WPA-only STA, remove RSN IE */
1823 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1824 wpa_ie_len = wpa_ie[1] + 2;
1825 }
1826 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1827 "sending 3/4 msg of 4-Way Handshake");
1828 if (sm->wpa == WPA_VERSION_WPA2) {
1829 /* WPA2 send GTK in the 4-way handshake */
1830 secure = 1;
1831 gtk = gsm->GTK[gsm->GN - 1];
1832 gtk_len = gsm->GTK_len;
1833 keyidx = gsm->GN;
1834 _rsc = rsc;
1835 encr = 1;
1836 } else {
1837 /* WPA does not include GTK in msg 3/4 */
1838 secure = 0;
1839 gtk = NULL;
1840 gtk_len = 0;
1841 keyidx = 0;
1842 _rsc = NULL;
1843 }
1844
1845 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1846 if (gtk)
1847 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
26e23750 1848#ifdef CONFIG_IEEE80211R
86dfabb8
JM		 1849 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1850 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
1851 kde_len += 300; /* FTIE + 2 * TIE */
1852 }
26e23750 1853#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 1854 kde = os_malloc(kde_len);
1855 if (kde == NULL)
1856 return;
1857
1858 pos = kde;
1859 os_memcpy(pos, wpa_ie, wpa_ie_len);
1860 pos += wpa_ie_len;
26e23750
JM		 1861#ifdef CONFIG_IEEE80211R
1862 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1863 int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
1864 if (res < 0) {
1865 wpa_printf(MSG_ERROR, "FT: Failed to insert "
1866 "PMKR1Name into RSN IE in EAPOL-Key data");
1867 os_free(kde);
1868 return;
1869 }
1870 pos += res;
1871 }
1872#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 1873 if (gtk) {
1874 u8 hdr[2];
1875 hdr[0] = keyidx & 0x03;
1876 hdr[1] = 0;
1877 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1878 gtk, gtk_len);
1879 }
1880 pos = ieee80211w_kde_add(sm, pos);
1881
86dfabb8
JM		 1882#ifdef CONFIG_IEEE80211R
1883 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1884 int res;
1885 struct wpa_auth_config *conf;
1886
1887 conf = &sm->wpa_auth->conf;
1888 res = wpa_write_ftie(conf, conf->r0_key_holder,
1889 conf->r0_key_holder_len,
1890 NULL, NULL, pos, kde + kde_len - pos,
1891 NULL, 0);
1892 if (res < 0) {
1893 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
1894 "into EAPOL-Key Key Data");
1895 os_free(kde);
1896 return;
1897 }
1898 pos += res;
1899
1900 /* TIE[ReassociationDeadline] (TU) */
1901 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1902 *pos++ = 5;
1903 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
1904 WPA_PUT_LE32(pos, conf->reassociation_deadline);
1905 pos += 4;
1906
1907 /* TIE[KeyLifetime] (seconds) */
1908 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1909 *pos++ = 5;
1910 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
1911 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
1912 pos += 4;
1913 }
1914#endif /* CONFIG_IEEE80211R */
1915
6fc6879b
JM		 1916 wpa_send_eapol(sm->wpa_auth, sm,
1917 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1918 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1919 WPA_KEY_INFO_KEY_TYPE,
1920 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1921 os_free(kde);
6fc6879b
JM		 1922}
1923
1924
1925SM_STATE(WPA_PTK, PTKINITDONE)
1926{
1927 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1928 sm->EAPOLKeyReceived = FALSE;
1929 if (sm->Pair) {
71934751 1930 enum wpa_alg alg;
6fc6879b
JM		 1931 int klen;
1932 if (sm->pairwise == WPA_CIPHER_TKIP) {
89d39d9d 1933 alg = WPA_ALG_TKIP;
6fc6879b
JM		 1934 klen = 32;
1935 } else {
89d39d9d 1936 alg = WPA_ALG_CCMP;
6fc6879b
JM		 1937 klen = 16;
1938 }
1939 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1940 sm->PTK.tk1, klen)) {
1941 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1942 return;
1943 }
1944 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1945 sm->pairwise_set = TRUE;
1946
581a8cde
JM		 1947 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1948 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1949 eloop_register_timeout(sm->wpa_auth->conf.
1950 wpa_ptk_rekey, 0, wpa_rekey_ptk,
1951 sm->wpa_auth, sm);
1952 }
1953
56586197 1954 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1955 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1956 WPA_EAPOL_authorized, 1);
1957 }
1958 }
1959
1960 if (0 /* IBSS == TRUE */) {
1961 sm->keycount++;
1962 if (sm->keycount == 2) {
1963 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1964 WPA_EAPOL_portValid, 1);
1965 }
1966 } else {
1967 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1968 1);
1969 }
1970 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1971 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1972 if (sm->wpa == WPA_VERSION_WPA)
1973 sm->PInitAKeys = TRUE;
1974 else
1975 sm->has_GTK = TRUE;
1976 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1977 "pairwise key handshake completed (%s)",
1978 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1979
1980#ifdef CONFIG_IEEE80211R
1981 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1982#endif /* CONFIG_IEEE80211R */
1983}
1984
1985
1986SM_STEP(WPA_PTK)
1987{
1988 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1989
1990 if (sm->Init)
1991 SM_ENTER(WPA_PTK, INITIALIZE);
1992 else if (sm->Disconnect
1aae01fc
BG		 1993 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
1994 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1995 "WPA_PTK: sm->Disconnect");
6fc6879b 1996 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 1997 }
6fc6879b
JM		 1998 else if (sm->DeauthenticationRequest)
1999 SM_ENTER(WPA_PTK, DISCONNECTED);
2000 else if (sm->AuthenticationRequest)
2001 SM_ENTER(WPA_PTK, AUTHENTICATION);
2002 else if (sm->ReAuthenticationRequest)
2003 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2004 else if (sm->PTKRequest)
2005 SM_ENTER(WPA_PTK, PTKSTART);
2006 else switch (sm->wpa_ptk_state) {
2007 case WPA_PTK_INITIALIZE:
2008 break;
2009 case WPA_PTK_DISCONNECT:
2010 SM_ENTER(WPA_PTK, DISCONNECTED);
2011 break;
2012 case WPA_PTK_DISCONNECTED:
2013 SM_ENTER(WPA_PTK, INITIALIZE);
2014 break;
2015 case WPA_PTK_AUTHENTICATION:
2016 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2017 break;
2018 case WPA_PTK_AUTHENTICATION2:
56586197 2019 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 2020 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2021 WPA_EAPOL_keyRun) > 0)
2022 SM_ENTER(WPA_PTK, INITPMK);
56586197 2023 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 2024 /* FIX: && 802.1X::keyRun */)
2025 SM_ENTER(WPA_PTK, INITPSK);
2026 break;
2027 case WPA_PTK_INITPMK:
2028 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2029 WPA_EAPOL_keyAvailable) > 0)
2030 SM_ENTER(WPA_PTK, PTKSTART);
2031 else {
2032 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2033 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2034 "INITPMK - keyAvailable = false");
6fc6879b
JM		 2035 SM_ENTER(WPA_PTK, DISCONNECT);
2036 }
2037 break;
2038 case WPA_PTK_INITPSK:
2039 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
2040 SM_ENTER(WPA_PTK, PTKSTART);
2041 else {
2042 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2043 "no PSK configured for the STA");
2044 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2045 SM_ENTER(WPA_PTK, DISCONNECT);
2046 }
2047 break;
2048 case WPA_PTK_PTKSTART:
2049 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2050 sm->EAPOLKeyPairwise)
2051 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2052 else if (sm->TimeoutCtr >
2053 (int) dot11RSNAConfigPairwiseUpdateCount) {
2054 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2055 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2056 "PTKSTART: Retry limit %d reached",
2057 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2058 SM_ENTER(WPA_PTK, DISCONNECT);
2059 } else if (sm->TimeoutEvt)
2060 SM_ENTER(WPA_PTK, PTKSTART);
2061 break;
2062 case WPA_PTK_PTKCALCNEGOTIATING:
2063 if (sm->MICVerified)
2064 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2065 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2066 sm->EAPOLKeyPairwise)
2067 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2068 else if (sm->TimeoutEvt)
2069 SM_ENTER(WPA_PTK, PTKSTART);
2070 break;
2071 case WPA_PTK_PTKCALCNEGOTIATING2:
2072 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2073 break;
2074 case WPA_PTK_PTKINITNEGOTIATING:
2075 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2076 sm->EAPOLKeyPairwise && sm->MICVerified)
2077 SM_ENTER(WPA_PTK, PTKINITDONE);
2078 else if (sm->TimeoutCtr >
2079 (int) dot11RSNAConfigPairwiseUpdateCount) {
2080 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2081 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2082 "PTKINITNEGOTIATING: Retry limit %d "
2083 "reached",
2084 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2085 SM_ENTER(WPA_PTK, DISCONNECT);
2086 } else if (sm->TimeoutEvt)
2087 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2088 break;
2089 case WPA_PTK_PTKINITDONE:
2090 break;
2091 }
2092}
2093
2094
2095SM_STATE(WPA_PTK_GROUP, IDLE)
2096{
2097 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2098 if (sm->Init) {
2099 /* Init flag is not cleared here, so avoid busy
2100 * loop by claiming nothing changed. */
2101 sm->changed = FALSE;
2102 }
2103 sm->GTimeoutCtr = 0;
2104}
2105
2106
2107SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2108{
2109 u8 rsc[WPA_KEY_RSC_LEN];
2110 struct wpa_group *gsm = sm->group;
2111 u8 *kde, *pos, hdr[2];
2112 size_t kde_len;
2113
2114 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 2115
2116 sm->GTimeoutCtr++;
2117 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2118 /* No point in sending the EAPOL-Key - we will disconnect
2119 * immediately following this. */
2120 return;
2121 }
2122
6fc6879b
JM		 2123 if (sm->wpa == WPA_VERSION_WPA)
2124 sm->PInitAKeys = FALSE;
2125 sm->TimeoutEvt = FALSE;
2126 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2127 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2128 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2129 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2130 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2131 "sending 1/2 msg of Group Key Handshake");
2132
2133 if (sm->wpa == WPA_VERSION_WPA2) {
2134 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2135 ieee80211w_kde_len(sm);
2136 kde = os_malloc(kde_len);
2137 if (kde == NULL)
2138 return;
2139
2140 pos = kde;
2141 hdr[0] = gsm->GN & 0x03;
2142 hdr[1] = 0;
2143 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2144 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2145 pos = ieee80211w_kde_add(sm, pos);
2146 } else {
2147 kde = gsm->GTK[gsm->GN - 1];
2148 pos = kde + gsm->GTK_len;
2149 }
2150
2151 wpa_send_eapol(sm->wpa_auth, sm,
2152 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2153 WPA_KEY_INFO_ACK |
2154 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2155 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
2156 if (sm->wpa == WPA_VERSION_WPA2)
2157 os_free(kde);
6fc6879b
JM		 2158}
2159
2160
2161SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2162{
2163 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2164 sm->EAPOLKeyReceived = FALSE;
2165 if (sm->GUpdateStationKeys)
2166 sm->group->GKeyDoneStations--;
2167 sm->GUpdateStationKeys = FALSE;
2168 sm->GTimeoutCtr = 0;
2169 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2170 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2171 "group key handshake completed (%s)",
2172 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2173 sm->has_GTK = TRUE;
2174}
2175
2176
2177SM_STATE(WPA_PTK_GROUP, KEYERROR)
2178{
2179 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2180 if (sm->GUpdateStationKeys)
2181 sm->group->GKeyDoneStations--;
2182 sm->GUpdateStationKeys = FALSE;
2183 sm->Disconnect = TRUE;
2184}
2185
2186
2187SM_STEP(WPA_PTK_GROUP)
2188{
9663596f 2189 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 2190 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 2191 sm->PtkGroupInit = FALSE;
2192 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 2193 case WPA_PTK_GROUP_IDLE:
2194 if (sm->GUpdateStationKeys ||
2195 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2196 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2197 break;
2198 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2199 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2200 !sm->EAPOLKeyPairwise && sm->MICVerified)
2201 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2202 else if (sm->GTimeoutCtr >
2203 (int) dot11RSNAConfigGroupUpdateCount)
2204 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2205 else if (sm->TimeoutEvt)
2206 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2207 break;
2208 case WPA_PTK_GROUP_KEYERROR:
2209 SM_ENTER(WPA_PTK_GROUP, IDLE);
2210 break;
2211 case WPA_PTK_GROUP_REKEYESTABLISHED:
2212 SM_ENTER(WPA_PTK_GROUP, IDLE);
2213 break;
2214 }
2215}
2216
2217
2218static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2219 struct wpa_group *group)
2220{
2221 int ret = 0;
2222
6fc6879b
JM		 2223 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2224 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2225 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2226 wpa_auth->addr, group->GNonce,
2227 group->GTK[group->GN - 1], group->GTK_len) < 0)
2228 ret = -1;
5cb9d5c3
JM		 2229 wpa_hexdump_key(MSG_DEBUG, "GTK",
2230 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 2231
2232#ifdef CONFIG_IEEE80211W
70f8cc8e 2233 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
5cb9d5c3
JM		 2234 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2235 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2236 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2237 wpa_auth->addr, group->GNonce,
2238 group->IGTK[group->GN_igtk - 4],
2239 WPA_IGTK_LEN) < 0)
2240 ret = -1;
6fc6879b
JM		 2241 wpa_hexdump_key(MSG_DEBUG, "IGTK",
2242 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
2243 }
2244#endif /* CONFIG_IEEE80211W */
2245
2246 return ret;
2247}
2248
2249
2250static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2251 struct wpa_group *group)
2252{
2253 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2254 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2255 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2256 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2257
2258 /* GTK[0..N] = 0 */
2259 os_memset(group->GTK, 0, sizeof(group->GTK));
2260 group->GN = 1;
2261 group->GM = 2;
2262#ifdef CONFIG_IEEE80211W
2263 group->GN_igtk = 4;
2264 group->GM_igtk = 5;
2265#endif /* CONFIG_IEEE80211W */
2266 /* GTK[GN] = CalcGTK() */
2267 wpa_gtk_update(wpa_auth, group);
2268}
2269
2270
2271static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2272{
2273 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2274 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2275 "Not in PTKINITDONE; skip Group Key update");
3c183894 2276 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 2277 return 0;
2278 }
9663596f
JM		 2279 if (sm->GUpdateStationKeys) {
2280 /*
3c183894
JM		 2281 * This should not really happen, so add a debug log entry.
2282 * Since we clear the GKeyDoneStations before the loop, the
2283 * station needs to be counted here anyway.
9663596f
JM		 2284 */
2285 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 2286 "GUpdateStationKeys was already set when "
2287 "marking station for GTK rekeying");
9663596f 2288 }
3c183894
JM		 2289
2290 sm->group->GKeyDoneStations++;
2291 sm->GUpdateStationKeys = TRUE;
2292
6fc6879b
JM		 2293 wpa_sm_step(sm);
2294 return 0;
2295}
2296
2297
2298static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2299 struct wpa_group *group)
2300{
2301 int tmp;
2302
2303 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2304 "SETKEYS (VLAN-ID %d)", group->vlan_id);
2305 group->changed = TRUE;
2306 group->wpa_group_state = WPA_GROUP_SETKEYS;
2307 group->GTKReKey = FALSE;
2308 tmp = group->GM;
2309 group->GM = group->GN;
2310 group->GN = tmp;
2311#ifdef CONFIG_IEEE80211W
2312 tmp = group->GM_igtk;
2313 group->GM_igtk = group->GN_igtk;
2314 group->GN_igtk = tmp;
2315#endif /* CONFIG_IEEE80211W */
2316 /* "GKeyDoneStations = GNoStations" is done in more robust way by
2317 * counting the STAs that are marked with GUpdateStationKeys instead of
2318 * including all STAs that could be in not-yet-completed state. */
2319 wpa_gtk_update(wpa_auth, group);
2320
3c183894
JM		 2321 if (group->GKeyDoneStations) {
2322 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2323 "GKeyDoneStations=%d when starting new GTK rekey",
2324 group->GKeyDoneStations);
2325 group->GKeyDoneStations = 0;
2326 }
6fc6879b
JM		 2327 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
2328 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2329 group->GKeyDoneStations);
2330}
2331
2332
1bdb7ab3
JM		 2333static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2334 struct wpa_group *group)
6fc6879b 2335{
3c7302c2
JM		 2336 int ret = 0;
2337
3c7302c2
JM		 2338 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
2339 wpa_alg_enum(wpa_auth->conf.wpa_group),
0382097e
JM		 2340 broadcast_ether_addr, group->GN,
2341 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 2342 ret = -1;
6fc6879b
JM		 2343
2344#ifdef CONFIG_IEEE80211W
3c7302c2
JM		 2345 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION &&
2346 wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK,
0382097e 2347 broadcast_ether_addr, group->GN_igtk,
3c7302c2
JM		 2348 group->IGTK[group->GN_igtk - 4],
2349 WPA_IGTK_LEN) < 0)
2350 ret = -1;
6fc6879b 2351#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 2352
2353 return ret;
6fc6879b
JM		 2354}
2355
2356
1bdb7ab3
JM		 2357static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2358 struct wpa_group *group)
2359{
2360 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2361 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2362 group->changed = TRUE;
2363 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2364
2365 if (wpa_group_config_group_keys(wpa_auth, group) < 0)
2366 return -1;
2367
2368 return 0;
2369}
2370
2371
6fc6879b
JM		 2372static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2373 struct wpa_group *group)
2374{
2375 if (group->GInit) {
2376 wpa_group_gtk_init(wpa_auth, group);
2377 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2378 group->GTKAuthenticator) {
2379 wpa_group_setkeysdone(wpa_auth, group);
2380 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2381 group->GTKReKey) {
2382 wpa_group_setkeys(wpa_auth, group);
2383 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2384 if (group->GKeyDoneStations == 0)
2385 wpa_group_setkeysdone(wpa_auth, group);
2386 else if (group->GTKReKey)
2387 wpa_group_setkeys(wpa_auth, group);
2388 }
2389}
2390
2391
e4a6ea1d 2392static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 2393{
2394 if (sm == NULL)
e4a6ea1d 2395 return 0;
6fc6879b
JM		 2396
2397 if (sm->in_step_loop) {
2398 /* This should not happen, but if it does, make sure we do not
2399 * end up freeing the state machine too early by exiting the
2400 * recursive call. */
2401 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 2402 return 0;
6fc6879b
JM		 2403 }
2404
2405 sm->in_step_loop = 1;
2406 do {
2407 if (sm->pending_deinit)
2408 break;
2409
2410 sm->changed = FALSE;
2411 sm->wpa_auth->group->changed = FALSE;
2412
2413 SM_STEP_RUN(WPA_PTK);
2414 if (sm->pending_deinit)
2415 break;
2416 SM_STEP_RUN(WPA_PTK_GROUP);
2417 if (sm->pending_deinit)
2418 break;
2419 wpa_group_sm_step(sm->wpa_auth, sm->group);
2420 } while (sm->changed || sm->wpa_auth->group->changed);
2421 sm->in_step_loop = 0;
2422
2423 if (sm->pending_deinit) {
2424 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2425 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2426 wpa_free_sta_sm(sm);
e4a6ea1d 2427 return 1;
6fc6879b 2428 }
e4a6ea1d 2429 return 0;
6fc6879b
JM		 2430}
2431
2432
2433static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2434{
2435 struct wpa_state_machine *sm = eloop_ctx;
2436 wpa_sm_step(sm);
2437}
2438
2439
2440void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2441{
2442 if (sm == NULL)
2443 return;
2444 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2445}
2446
2447
2448void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2449{
2450 int tmp, i;
2451 struct wpa_group *group;
2452
2453 if (wpa_auth == NULL)
2454 return;
2455
2456 group = wpa_auth->group;
2457
2458 for (i = 0; i < 2; i++) {
2459 tmp = group->GM;
2460 group->GM = group->GN;
2461 group->GN = tmp;
2462#ifdef CONFIG_IEEE80211W
2463 tmp = group->GM_igtk;
2464 group->GM_igtk = group->GN_igtk;
2465 group->GN_igtk = tmp;
2466#endif /* CONFIG_IEEE80211W */
2467 wpa_gtk_update(wpa_auth, group);
2468 }
2469}
2470
2471
2472static const char * wpa_bool_txt(int bool)
2473{
2474 return bool ? "TRUE" : "FALSE";
2475}
2476
2477
2478static int wpa_cipher_bits(int cipher)
2479{
2480 switch (cipher) {
2481 case WPA_CIPHER_CCMP:
2482 return 128;
2483 case WPA_CIPHER_TKIP:
2484 return 256;
2485 case WPA_CIPHER_WEP104:
2486 return 104;
2487 case WPA_CIPHER_WEP40:
2488 return 40;
2489 default:
2490 return 0;
2491 }
2492}
2493
2494
2495#define RSN_SUITE "%02x-%02x-%02x-%d"
2496#define RSN_SUITE_ARG(s) \
2497((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2498
2499int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2500{
2501 int len = 0, ret;
2502 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 2503#ifdef CONFIG_RSN_PREAUTH
2504 const int preauth = 1;
2505#else /* CONFIG_RSN_PREAUTH */
2506 const int preauth = 0;
2507#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 2508
2509 if (wpa_auth == NULL)
2510 return len;
2511
2512 ret = os_snprintf(buf + len, buflen - len,
2513 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 2514 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 2515 "dot11RSNAEnabled=%s\n"
2516 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 2517 wpa_bool_txt(preauth),
6fc6879b
JM		 2518 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2519 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2520 if (ret < 0 || (size_t) ret >= buflen - len)
2521 return len;
2522 len += ret;
2523
2524 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2525 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2526
2527 ret = os_snprintf(
2528 buf + len, buflen - len,
2529 "dot11RSNAConfigVersion=%u\n"
2530 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2531 /* FIX: dot11RSNAConfigGroupCipher */
2532 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2533 /* FIX: dot11RSNAConfigGroupRekeyTime */
2534 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2535 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2536 "dot11RSNAConfigGroupUpdateCount=%u\n"
2537 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2538 "dot11RSNAConfigGroupCipherSize=%u\n"
2539 "dot11RSNAConfigPMKLifetime=%u\n"
2540 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2541 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2542 "dot11RSNAConfigSATimeout=%u\n"
2543 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2544 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2545 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2546 "dot11RSNAPMKIDUsed=%s\n"
2547 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2548 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2549 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2550 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2551 "dot11RSNA4WayHandshakeFailures=%u\n"
2552 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2553 RSN_VERSION,
2554 !!wpa_auth->conf.wpa_strict_rekey,
2555 dot11RSNAConfigGroupUpdateCount,
2556 dot11RSNAConfigPairwiseUpdateCount,
2557 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2558 dot11RSNAConfigPMKLifetime,
2559 dot11RSNAConfigPMKReauthThreshold,
2560 dot11RSNAConfigSATimeout,
2561 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2562 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2563 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2564 pmkid_txt,
2565 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2566 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2567 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2568 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2569 wpa_auth->dot11RSNA4WayHandshakeFailures);
2570 if (ret < 0 || (size_t) ret >= buflen - len)
2571 return len;
2572 len += ret;
2573
2574 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2575 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2576
2577 /* Private MIB */
2578 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2579 wpa_auth->group->wpa_group_state);
2580 if (ret < 0 || (size_t) ret >= buflen - len)
2581 return len;
2582 len += ret;
2583
2584 return len;
2585}
2586
2587
2588int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2589{
2590 int len = 0, ret;
2591 u32 pairwise = 0;
2592
2593 if (sm == NULL)
2594 return 0;
2595
2596 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2597
2598 /* dot11RSNAStatsEntry */
2599
2600 if (sm->wpa == WPA_VERSION_WPA) {
2601 if (sm->pairwise == WPA_CIPHER_CCMP)
2602 pairwise = WPA_CIPHER_SUITE_CCMP;
2603 else if (sm->pairwise == WPA_CIPHER_TKIP)
2604 pairwise = WPA_CIPHER_SUITE_TKIP;
2605 else if (sm->pairwise == WPA_CIPHER_WEP104)
2606 pairwise = WPA_CIPHER_SUITE_WEP104;
2607 else if (sm->pairwise == WPA_CIPHER_WEP40)
2608 pairwise = WPA_CIPHER_SUITE_WEP40;
2609 else if (sm->pairwise == WPA_CIPHER_NONE)
2610 pairwise = WPA_CIPHER_SUITE_NONE;
2611 } else if (sm->wpa == WPA_VERSION_WPA2) {
2612 if (sm->pairwise == WPA_CIPHER_CCMP)
2613 pairwise = RSN_CIPHER_SUITE_CCMP;
2614 else if (sm->pairwise == WPA_CIPHER_TKIP)
2615 pairwise = RSN_CIPHER_SUITE_TKIP;
2616 else if (sm->pairwise == WPA_CIPHER_WEP104)
2617 pairwise = RSN_CIPHER_SUITE_WEP104;
2618 else if (sm->pairwise == WPA_CIPHER_WEP40)
2619 pairwise = RSN_CIPHER_SUITE_WEP40;
2620 else if (sm->pairwise == WPA_CIPHER_NONE)
2621 pairwise = RSN_CIPHER_SUITE_NONE;
2622 } else
2623 return 0;
2624
2625 ret = os_snprintf(
2626 buf + len, buflen - len,
2627 /* TODO: dot11RSNAStatsIndex */
2628 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2629 "dot11RSNAStatsVersion=1\n"
2630 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2631 /* TODO: dot11RSNAStatsTKIPICVErrors */
2632 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 2633 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 2634 /* TODO: dot11RSNAStatsCCMPReplays */
2635 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2636 /* TODO: dot11RSNAStatsTKIPReplays */,
2637 MAC2STR(sm->addr),
2638 RSN_SUITE_ARG(pairwise),
2639 sm->dot11RSNAStatsTKIPLocalMICFailures,
2640 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2641 if (ret < 0 || (size_t) ret >= buflen - len)
2642 return len;
2643 len += ret;
2644
2645 /* Private MIB */
2646 ret = os_snprintf(buf + len, buflen - len,
2647 "hostapdWPAPTKState=%d\n"
2648 "hostapdWPAPTKGroupState=%d\n",
2649 sm->wpa_ptk_state,
2650 sm->wpa_ptk_group_state);
2651 if (ret < 0 || (size_t) ret >= buflen - len)
2652 return len;
2653 len += ret;
2654
2655 return len;
2656}
2657
2658
2659void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2660{
2661 if (wpa_auth)
2662 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2663}
2664
2665
2666int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2667{
2668 return sm && sm->pairwise_set;
2669}
2670
2671
ff36ff00
JM		 2672int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2673{
2674 return sm->pairwise;
2675}
2676
2677
6fc6879b
JM		 2678int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2679{
2680 if (sm == NULL)
2681 return -1;
2682 return sm->wpa_key_mgmt;
2683}
2684
2685
2686int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2687{
2688 if (sm == NULL)
2689 return 0;
2690 return sm->wpa;
2691}
2692
2693
2694int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2695 struct rsn_pmksa_cache_entry *entry)
2696{
2697 if (sm == NULL || sm->pmksa != entry)
2698 return -1;
2699 sm->pmksa = NULL;
2700 return 0;
2701}
2702
2703
2704struct rsn_pmksa_cache_entry *
2705wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2706{
2707 return sm ? sm->pmksa : NULL;
2708}
2709
2710
2711void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2712{
2713 if (sm)
2714 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2715}
2716
2717
2718const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2719{
2720 if (wpa_auth == NULL)
2721 return NULL;
2722 *len = wpa_auth->wpa_ie_len;
2723 return wpa_auth->wpa_ie;
2724}
2725
2726
2727int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2728 int session_timeout, struct eapol_state_machine *eapol)
2729{
2730 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2731 return -1;
2732
4bb081f1
JM		 2733 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2734 sm->wpa_auth->addr, sm->addr, session_timeout,
2735 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 2736 return 0;
2737
2738 return -1;
2739}
2740
2741
2742int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2743 const u8 *pmk, size_t len, const u8 *sta_addr,
2744 int session_timeout,
2745 struct eapol_state_machine *eapol)
2746{
2747 if (wpa_auth == NULL)
2748 return -1;
2749
4bb081f1
JM		 2750 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2751 sta_addr, session_timeout, eapol,
2752 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 2753 return 0;
2754
2755 return -1;
2756}
2757
2758
2759static struct wpa_group *
2760wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2761{
2762 struct wpa_group *group;
2763
2764 if (wpa_auth == NULL || wpa_auth->group == NULL)
2765 return NULL;
2766
2767 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2768 vlan_id);
2769 group = wpa_group_init(wpa_auth, vlan_id);
2770 if (group == NULL)
2771 return NULL;
2772
2773 group->next = wpa_auth->group->next;
2774 wpa_auth->group->next = group;
2775
2776 return group;
2777}
2778
2779
2780int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2781{
2782 struct wpa_group *group;
2783
2784 if (sm == NULL || sm->wpa_auth == NULL)
2785 return 0;
2786
2787 group = sm->wpa_auth->group;
2788 while (group) {
2789 if (group->vlan_id == vlan_id)
2790 break;
2791 group = group->next;
2792 }
2793
2794 if (group == NULL) {
2795 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2796 if (group == NULL)
2797 return -1;
2798 }
2799
2800 if (sm->group == group)
2801 return 0;
2802
2803 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2804 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2805
2806 sm->group = group;
2807 return 0;
2808}
e4bf4db9
JM		 2809
2810
2811void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
2812 struct wpa_state_machine *sm, int ack)
2813{
2814 if (wpa_auth == NULL || sm == NULL)
2815 return;
2816 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
2817 " ack=%d", MAC2STR(sm->addr), ack);
2818 if (sm->pending_1_of_4_timeout && ack) {
2819 /*
2820 * Some deployed supplicant implementations update their SNonce
2821 * for each EAPOL-Key 2/4 message even within the same 4-way
2822 * handshake and then fail to use the first SNonce when
2823 * deriving the PTK. This results in unsuccessful 4-way
2824 * handshake whenever the relatively short initial timeout is
2825 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
2826 * around this by increasing the timeout now that we know that
2827 * the station has received the frame.
2828 */
2829 int timeout_ms = eapol_key_timeout_subseq;
2830 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
2831 "timeout by %u ms because of acknowledged frame",
2832 timeout_ms);
2833 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
2834 eloop_register_timeout(timeout_ms / 1000,
2835 (timeout_ms % 1000) * 1000,
2836 wpa_send_eapol_timeout, wpa_auth, sm);
2837 }
2838}
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