?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Added WirelessManager, a port of wpa_supplicant.
[AROS.git] / workbench / network / WirelessManager / src / ap / wpa_auth.c
blob36cb0f4783c34dcf4f0965bdd923818deb222ea2
1 /*
2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator
3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "utils/includes.h"
16
17 #include "utils/common.h"
18 #include "utils/eloop.h"
19 #include "utils/state_machine.h"
20 #include "common/ieee802_11_defs.h"
21 #include "crypto/aes_wrap.h"
22 #include "crypto/crypto.h"
23 #include "crypto/sha1.h"
24 #include "crypto/sha256.h"
25 #include "eapol_auth/eapol_auth_sm.h"
26 #include "ap_config.h"
27 #include "ieee802_11.h"
28 #include "wpa_auth.h"
29 #include "pmksa_cache_auth.h"
30 #include "wpa_auth_i.h"
31 #include "wpa_auth_ie.h"
32
33 #define STATE_MACHINE_DATA struct wpa_state_machine
34 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
35 #define STATE_MACHINE_ADDR sm->addr
36
37
38 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
39 static int wpa_sm_step(struct wpa_state_machine *sm);
40 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
41 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
42 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
43 struct wpa_group *group);
44 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
45 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
46 struct wpa_group *group);
47
48 static const u32 dot11RSNAConfigGroupUpdateCount = 4;
49 static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
50 static const u32 eapol_key_timeout_first = 100; /* ms */
51 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
52
53 /* TODO: make these configurable */
54 static const int dot11RSNAConfigPMKLifetime = 43200;
55 static const int dot11RSNAConfigPMKReauthThreshold = 70;
56 static const int dot11RSNAConfigSATimeout = 60;
57
58
59 static inline void wpa_auth_mic_failure_report(
60 struct wpa_authenticator *wpa_auth, const u8 *addr)
61 {
62 if (wpa_auth->cb.mic_failure_report)
63 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
64 }
65
66
67 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
68 const u8 *addr, wpa_eapol_variable var,
69 int value)
70 {
71 if (wpa_auth->cb.set_eapol)
72 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
73 }
74
75
76 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
77 const u8 *addr, wpa_eapol_variable var)
78 {
79 if (wpa_auth->cb.get_eapol == NULL)
80 return -1;
81 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
82 }
83
84
85 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
86 const u8 *addr, const u8 *prev_psk)
87 {
88 if (wpa_auth->cb.get_psk == NULL)
89 return NULL;
90 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
91 }
92
93
94 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
95 const u8 *addr, u8 *msk, size_t *len)
96 {
97 if (wpa_auth->cb.get_msk == NULL)
98 return -1;
99 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
100 }
101
102
103 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
104 int vlan_id,
105 enum wpa_alg alg, const u8 *addr, int idx,
106 u8 *key, size_t key_len)
107 {
108 if (wpa_auth->cb.set_key == NULL)
109 return -1;
110 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
111 key, key_len);
112 }
113
114
115 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
116 const u8 *addr, int idx, u8 *seq)
117 {
118 if (wpa_auth->cb.get_seqnum == NULL)
119 return -1;
120 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
121 }
122
123
124 static inline int
125 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
126 const u8 *data, size_t data_len, int encrypt)
127 {
128 if (wpa_auth->cb.send_eapol == NULL)
129 return -1;
130 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
131 encrypt);
132 }
133
134
135 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
136 int (*cb)(struct wpa_state_machine *sm, void *ctx),
137 void *cb_ctx)
138 {
139 if (wpa_auth->cb.for_each_sta == NULL)
140 return 0;
141 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
142 }
143
144
145 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
146 int (*cb)(struct wpa_authenticator *a, void *ctx),
147 void *cb_ctx)
148 {
149 if (wpa_auth->cb.for_each_auth == NULL)
150 return 0;
151 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
152 }
153
154
155 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
156 logger_level level, const char *txt)
157 {
158 if (wpa_auth->cb.logger == NULL)
159 return;
160 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
161 }
162
163
164 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
165 logger_level level, const char *fmt, ...)
166 {
167 char *format;
168 int maxlen;
169 va_list ap;
170
171 if (wpa_auth->cb.logger == NULL)
172 return;
173
174 maxlen = os_strlen(fmt) + 100;
175 format = os_malloc(maxlen);
176 if (!format)
177 return;
178
179 va_start(ap, fmt);
180 vsnprintf(format, maxlen, fmt, ap);
181 va_end(ap);
182
183 wpa_auth_logger(wpa_auth, addr, level, format);
184
185 os_free(format);
186 }
187
188
189 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
190 const u8 *addr)
191 {
192 if (wpa_auth->cb.disconnect == NULL)
193 return;
194 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
195 WLAN_REASON_PREV_AUTH_NOT_VALID);
196 }
197
198
199 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
200 {
201 int ret = 0;
202 #ifdef CONFIG_IEEE80211R
203 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
204 ret = 1;
205 #endif /* CONFIG_IEEE80211R */
206 #ifdef CONFIG_IEEE80211W
207 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
208 ret = 1;
209 #endif /* CONFIG_IEEE80211W */
210 return ret;
211 }
212
213
214 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
215 {
216 struct wpa_authenticator *wpa_auth = eloop_ctx;
217
218 if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
219 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
220 "initialization.");
221 } else {
222 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
223 }
224
225 if (wpa_auth->conf.wpa_gmk_rekey) {
226 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
227 wpa_rekey_gmk, wpa_auth, NULL);
228 }
229 }
230
231
232 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
233 {
234 struct wpa_authenticator *wpa_auth = eloop_ctx;
235 struct wpa_group *group;
236
237 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
238 for (group = wpa_auth->group; group; group = group->next) {
239 group->GTKReKey = TRUE;
240 do {
241 group->changed = FALSE;
242 wpa_group_sm_step(wpa_auth, group);
243 } while (group->changed);
244 }
245
246 if (wpa_auth->conf.wpa_group_rekey) {
247 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
248 0, wpa_rekey_gtk, wpa_auth, NULL);
249 }
250 }
251
252
253 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
254 {
255 struct wpa_authenticator *wpa_auth = eloop_ctx;
256 struct wpa_state_machine *sm = timeout_ctx;
257
258 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
259 wpa_request_new_ptk(sm);
260 wpa_sm_step(sm);
261 }
262
263
264 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
265 {
266 if (sm->pmksa == ctx)
267 sm->pmksa = NULL;
268 return 0;
269 }
270
271
272 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
273 void *ctx)
274 {
275 struct wpa_authenticator *wpa_auth = ctx;
276 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
277 }
278
279
280 static void wpa_group_set_key_len(struct wpa_group *group, int cipher)
281 {
282 switch (cipher) {
283 case WPA_CIPHER_CCMP:
284 group->GTK_len = 16;
285 break;
286 case WPA_CIPHER_TKIP:
287 group->GTK_len = 32;
288 break;
289 case WPA_CIPHER_WEP104:
290 group->GTK_len = 13;
291 break;
292 case WPA_CIPHER_WEP40:
293 group->GTK_len = 5;
294 break;
295 }
296 }
297
298
299 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
300 int vlan_id)
301 {
302 struct wpa_group *group;
303 u8 buf[ETH_ALEN + 8 + sizeof(group)];
304 u8 rkey[32];
305
306 group = os_zalloc(sizeof(struct wpa_group));
307 if (group == NULL)
308 return NULL;
309
310 group->GTKAuthenticator = TRUE;
311 group->vlan_id = vlan_id;
312
313 wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
314
315 /* Counter = PRF-256(Random number, "Init Counter",
316 * Local MAC Address || Time)
317 */
318 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
319 wpa_get_ntp_timestamp(buf + ETH_ALEN);
320 os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
321 if (os_get_random(rkey, sizeof(rkey)) ||
322 os_get_random(group->GMK, WPA_GMK_LEN)) {
323 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
324 "initialization.");
325 os_free(group);
326 return NULL;
327 }
328
329 sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
330 group->Counter, WPA_NONCE_LEN);
331
332 group->GInit = TRUE;
333 wpa_group_sm_step(wpa_auth, group);
334 group->GInit = FALSE;
335 wpa_group_sm_step(wpa_auth, group);
336
337 return group;
338 }
339
340
341 /**
342 * wpa_init - Initialize WPA authenticator
343 * @addr: Authenticator address
344 * @conf: Configuration for WPA authenticator
345 * @cb: Callback functions for WPA authenticator
346 * Returns: Pointer to WPA authenticator data or %NULL on failure
347 */
348 struct wpa_authenticator * wpa_init(const u8 *addr,
349 struct wpa_auth_config *conf,
350 struct wpa_auth_callbacks *cb)
351 {
352 struct wpa_authenticator *wpa_auth;
353
354 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
355 if (wpa_auth == NULL)
356 return NULL;
357 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
358 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
359 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
360
361 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
362 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
363 os_free(wpa_auth);
364 return NULL;
365 }
366
367 wpa_auth->group = wpa_group_init(wpa_auth, 0);
368 if (wpa_auth->group == NULL) {
369 os_free(wpa_auth->wpa_ie);
370 os_free(wpa_auth);
371 return NULL;
372 }
373
374 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
375 wpa_auth);
376 if (wpa_auth->pmksa == NULL) {
377 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
378 os_free(wpa_auth->wpa_ie);
379 os_free(wpa_auth);
380 return NULL;
381 }
382
383 #ifdef CONFIG_IEEE80211R
384 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
385 if (wpa_auth->ft_pmk_cache == NULL) {
386 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
387 os_free(wpa_auth->wpa_ie);
388 pmksa_cache_auth_deinit(wpa_auth->pmksa);
389 os_free(wpa_auth);
390 return NULL;
391 }
392 #endif /* CONFIG_IEEE80211R */
393
394 if (wpa_auth->conf.wpa_gmk_rekey) {
395 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
396 wpa_rekey_gmk, wpa_auth, NULL);
397 }
398
399 if (wpa_auth->conf.wpa_group_rekey) {
400 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
401 wpa_rekey_gtk, wpa_auth, NULL);
402 }
403
404 return wpa_auth;
405 }
406
407
408 /**
409 * wpa_deinit - Deinitialize WPA authenticator
410 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
411 */
412 void wpa_deinit(struct wpa_authenticator *wpa_auth)
413 {
414 struct wpa_group *group, *prev;
415
416 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
417 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
418
419 #ifdef CONFIG_PEERKEY
420 while (wpa_auth->stsl_negotiations)
421 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
422 #endif /* CONFIG_PEERKEY */
423
424 pmksa_cache_auth_deinit(wpa_auth->pmksa);
425
426 #ifdef CONFIG_IEEE80211R
427 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
428 wpa_auth->ft_pmk_cache = NULL;
429 #endif /* CONFIG_IEEE80211R */
430
431 os_free(wpa_auth->wpa_ie);
432
433 group = wpa_auth->group;
434 while (group) {
435 prev = group;
436 group = group->next;
437 os_free(prev);
438 }
439
440 os_free(wpa_auth);
441 }
442
443
444 /**
445 * wpa_reconfig - Update WPA authenticator configuration
446 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
447 * @conf: Configuration for WPA authenticator
448 */
449 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
450 struct wpa_auth_config *conf)
451 {
452 struct wpa_group *group;
453 if (wpa_auth == NULL)
454 return 0;
455
456 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
457 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
458 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
459 return -1;
460 }
461
462 /*
463 * Reinitialize GTK to make sure it is suitable for the new
464 * configuration.
465 */
466 group = wpa_auth->group;
467 wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
468 group->GInit = TRUE;
469 wpa_group_sm_step(wpa_auth, group);
470 group->GInit = FALSE;
471 wpa_group_sm_step(wpa_auth, group);
472
473 return 0;
474 }
475
476
477 struct wpa_state_machine *
478 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
479 {
480 struct wpa_state_machine *sm;
481
482 sm = os_zalloc(sizeof(struct wpa_state_machine));
483 if (sm == NULL)
484 return NULL;
485 os_memcpy(sm->addr, addr, ETH_ALEN);
486
487 sm->wpa_auth = wpa_auth;
488 sm->group = wpa_auth->group;
489
490 return sm;
491 }
492
493
494 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
495 struct wpa_state_machine *sm)
496 {
497 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
498 return -1;
499
500 #ifdef CONFIG_IEEE80211R
501 if (sm->ft_completed) {
502 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
503 "FT authentication already completed - do not "
504 "start 4-way handshake");
505 return 0;
506 }
507 #endif /* CONFIG_IEEE80211R */
508
509 if (sm->started) {
510 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
511 sm->ReAuthenticationRequest = TRUE;
512 return wpa_sm_step(sm);
513 }
514
515 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
516 "start authentication");
517 sm->started = 1;
518
519 sm->Init = TRUE;
520 if (wpa_sm_step(sm) == 1)
521 return 1; /* should not really happen */
522 sm->Init = FALSE;
523 sm->AuthenticationRequest = TRUE;
524 return wpa_sm_step(sm);
525 }
526
527
528 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
529 {
530 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
531 * reassociates back to the same AP while the previous entry for the
532 * STA has not yet been removed. */
533 if (sm == NULL)
534 return;
535
536 sm->wpa_key_mgmt = 0;
537 }
538
539
540 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
541 {
542 #ifdef CONFIG_IEEE80211R
543 os_free(sm->assoc_resp_ftie);
544 #endif /* CONFIG_IEEE80211R */
545 os_free(sm->last_rx_eapol_key);
546 os_free(sm->wpa_ie);
547 os_free(sm);
548 }
549
550
551 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
552 {
553 if (sm == NULL)
554 return;
555
556 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
557 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
558 "strict rekeying - force GTK rekey since STA "
559 "is leaving");
560 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
561 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
562 NULL);
563 }
564
565 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
566 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
567 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
568 if (sm->in_step_loop) {
569 /* Must not free state machine while wpa_sm_step() is running.
570 * Freeing will be completed in the end of wpa_sm_step(). */
571 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
572 "machine deinit for " MACSTR, MAC2STR(sm->addr));
573 sm->pending_deinit = 1;
574 } else
575 wpa_free_sta_sm(sm);
576 }
577
578
579 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
580 {
581 if (sm == NULL)
582 return;
583
584 sm->PTKRequest = TRUE;
585 sm->PTK_valid = 0;
586 }
587
588
589 static int wpa_replay_counter_valid(struct wpa_state_machine *sm,
590 const u8 *replay_counter)
591 {
592 int i;
593 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
594 if (!sm->key_replay[i].valid)
595 break;
596 if (os_memcmp(replay_counter, sm->key_replay[i].counter,
597 WPA_REPLAY_COUNTER_LEN) == 0)
598 return 1;
599 }
600 return 0;
601 }
602
603
604 #ifdef CONFIG_IEEE80211R
605 static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
606 struct wpa_state_machine *sm,
607 struct wpa_eapol_ie_parse *kde)
608 {
609 struct wpa_ie_data ie;
610 struct rsn_mdie *mdie;
611
612 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
613 ie.num_pmkid != 1 || ie.pmkid == NULL) {
614 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
615 "FT 4-way handshake message 2/4");
616 return -1;
617 }
618
619 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
620 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
621 sm->sup_pmk_r1_name, PMKID_LEN);
622
623 if (!kde->mdie || !kde->ftie) {
624 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
625 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
626 return -1;
627 }
628
629 mdie = (struct rsn_mdie *) (kde->mdie + 2);
630 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
631 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
632 MOBILITY_DOMAIN_ID_LEN) != 0) {
633 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
634 return -1;
635 }
636
637 if (sm->assoc_resp_ftie &&
638 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
639 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
640 2 + sm->assoc_resp_ftie[1]) != 0)) {
641 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
642 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
643 kde->ftie, kde->ftie_len);
644 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
645 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
646 return -1;
647 }
648
649 return 0;
650 }
651 #endif /* CONFIG_IEEE80211R */
652
653
654 void wpa_receive(struct wpa_authenticator *wpa_auth,
655 struct wpa_state_machine *sm,
656 u8 *data, size_t data_len)
657 {
658 struct ieee802_1x_hdr *hdr;
659 struct wpa_eapol_key *key;
660 u16 key_info, key_data_length;
661 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
662 SMK_M1, SMK_M3, SMK_ERROR } msg;
663 char *msgtxt;
664 struct wpa_eapol_ie_parse kde;
665 int ft;
666 const u8 *eapol_key_ie;
667 size_t eapol_key_ie_len;
668
669 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
670 return;
671
672 if (data_len < sizeof(*hdr) + sizeof(*key))
673 return;
674
675 hdr = (struct ieee802_1x_hdr *) data;
676 key = (struct wpa_eapol_key *) (hdr + 1);
677 key_info = WPA_GET_BE16(key->key_info);
678 key_data_length = WPA_GET_BE16(key->key_data_length);
679 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
680 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
681 "key_data overflow (%d > %lu)",
682 key_data_length,
683 (unsigned long) (data_len - sizeof(*hdr) -
684 sizeof(*key)));
685 return;
686 }
687
688 if (sm->wpa == WPA_VERSION_WPA2) {
689 if (key->type != EAPOL_KEY_TYPE_RSN) {
690 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
691 "unexpected type %d in RSN mode",
692 key->type);
693 return;
694 }
695 } else {
696 if (key->type != EAPOL_KEY_TYPE_WPA) {
697 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
698 "unexpected type %d in WPA mode",
699 key->type);
700 return;
701 }
702 }
703
704 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
705 * are set */
706
707 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
708 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
709 if (key_info & WPA_KEY_INFO_ERROR) {
710 msg = SMK_ERROR;
711 msgtxt = "SMK Error";
712 } else {
713 msg = SMK_M1;
714 msgtxt = "SMK M1";
715 }
716 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
717 msg = SMK_M3;
718 msgtxt = "SMK M3";
719 } else if (key_info & WPA_KEY_INFO_REQUEST) {
720 msg = REQUEST;
721 msgtxt = "Request";
722 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
723 msg = GROUP_2;
724 msgtxt = "2/2 Group";
725 } else if (key_data_length == 0) {
726 msg = PAIRWISE_4;
727 msgtxt = "4/4 Pairwise";
728 } else {
729 msg = PAIRWISE_2;
730 msgtxt = "2/4 Pairwise";
731 }
732
733 /* TODO: key_info type validation for PeerKey */
734 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
735 msg == GROUP_2) {
736 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
737 if (sm->pairwise == WPA_CIPHER_CCMP) {
738 if (wpa_use_aes_cmac(sm) &&
739 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
740 wpa_auth_logger(wpa_auth, sm->addr,
741 LOGGER_WARNING,
742 "advertised support for "
743 "AES-128-CMAC, but did not "
744 "use it");
745 return;
746 }
747
748 if (!wpa_use_aes_cmac(sm) &&
749 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
750 wpa_auth_logger(wpa_auth, sm->addr,
751 LOGGER_WARNING,
752 "did not use HMAC-SHA1-AES "
753 "with CCMP");
754 return;
755 }
756 }
757 }
758
759 if (key_info & WPA_KEY_INFO_REQUEST) {
760 if (sm->req_replay_counter_used &&
761 os_memcmp(key->replay_counter, sm->req_replay_counter,
762 WPA_REPLAY_COUNTER_LEN) <= 0) {
763 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
764 "received EAPOL-Key request with "
765 "replayed counter");
766 return;
767 }
768 }
769
770 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
771 !wpa_replay_counter_valid(sm, key->replay_counter)) {
772 int i;
773 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
774 "received EAPOL-Key %s with unexpected "
775 "replay counter", msgtxt);
776 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
777 if (!sm->key_replay[i].valid)
778 break;
779 wpa_hexdump(MSG_DEBUG, "pending replay counter",
780 sm->key_replay[i].counter,
781 WPA_REPLAY_COUNTER_LEN);
782 }
783 wpa_hexdump(MSG_DEBUG, "received replay counter",
784 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
785 return;
786 }
787
788 switch (msg) {
789 case PAIRWISE_2:
790 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
791 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
792 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
793 "received EAPOL-Key msg 2/4 in "
794 "invalid state (%d) - dropped",
795 sm->wpa_ptk_state);
796 return;
797 }
798 if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length,
799 &kde) < 0) {
800 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
801 "received EAPOL-Key msg 2/4 with "
802 "invalid Key Data contents");
803 return;
804 }
805 if (kde.rsn_ie) {
806 eapol_key_ie = kde.rsn_ie;
807 eapol_key_ie_len = kde.rsn_ie_len;
808 } else {
809 eapol_key_ie = kde.wpa_ie;
810 eapol_key_ie_len = kde.wpa_ie_len;
811 }
812 ft = sm->wpa == WPA_VERSION_WPA2 &&
813 wpa_key_mgmt_ft(sm->wpa_key_mgmt);
814 if (sm->wpa_ie == NULL ||
815 wpa_compare_rsn_ie(ft,
816 sm->wpa_ie, sm->wpa_ie_len,
817 eapol_key_ie, eapol_key_ie_len)) {
818 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
819 "WPA IE from (Re)AssocReq did not "
820 "match with msg 2/4");
821 if (sm->wpa_ie) {
822 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
823 sm->wpa_ie, sm->wpa_ie_len);
824 }
825 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
826 eapol_key_ie, eapol_key_ie_len);
827 /* MLME-DEAUTHENTICATE.request */
828 wpa_sta_disconnect(wpa_auth, sm->addr);
829 return;
830 }
831 #ifdef CONFIG_IEEE80211R
832 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
833 wpa_sta_disconnect(wpa_auth, sm->addr);
834 return;
835 }
836 #endif /* CONFIG_IEEE80211R */
837 break;
838 case PAIRWISE_4:
839 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
840 !sm->PTK_valid) {
841 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
842 "received EAPOL-Key msg 4/4 in "
843 "invalid state (%d) - dropped",
844 sm->wpa_ptk_state);
845 return;
846 }
847 break;
848 case GROUP_2:
849 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
850 || !sm->PTK_valid) {
851 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
852 "received EAPOL-Key msg 2/2 in "
853 "invalid state (%d) - dropped",
854 sm->wpa_ptk_group_state);
855 return;
856 }
857 break;
858 #ifdef CONFIG_PEERKEY
859 case SMK_M1:
860 case SMK_M3:
861 case SMK_ERROR:
862 if (!wpa_auth->conf.peerkey) {
863 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
864 "PeerKey use disabled - ignoring message");
865 return;
866 }
867 if (!sm->PTK_valid) {
868 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
869 "received EAPOL-Key msg SMK in "
870 "invalid state - dropped");
871 return;
872 }
873 break;
874 #else /* CONFIG_PEERKEY */
875 case SMK_M1:
876 case SMK_M3:
877 case SMK_ERROR:
878 return; /* STSL disabled - ignore SMK messages */
879 #endif /* CONFIG_PEERKEY */
880 case REQUEST:
881 break;
882 }
883
884 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
885 "received EAPOL-Key frame (%s)", msgtxt);
886
887 if (key_info & WPA_KEY_INFO_ACK) {
888 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
889 "received invalid EAPOL-Key: Key Ack set");
890 return;
891 }
892
893 if (!(key_info & WPA_KEY_INFO_MIC)) {
894 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
895 "received invalid EAPOL-Key: Key MIC not set");
896 return;
897 }
898
899 sm->MICVerified = FALSE;
900 if (sm->PTK_valid) {
901 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
902 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
903 "received EAPOL-Key with invalid MIC");
904 return;
905 }
906 sm->MICVerified = TRUE;
907 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
908 }
909
910 if (key_info & WPA_KEY_INFO_REQUEST) {
911 if (sm->MICVerified) {
912 sm->req_replay_counter_used = 1;
913 os_memcpy(sm->req_replay_counter, key->replay_counter,
914 WPA_REPLAY_COUNTER_LEN);
915 } else {
916 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
917 "received EAPOL-Key request with "
918 "invalid MIC");
919 return;
920 }
921
922 /*
923 * TODO: should decrypt key data field if encryption was used;
924 * even though MAC address KDE is not normally encrypted,
925 * supplicant is allowed to encrypt it.
926 */
927 if (msg == SMK_ERROR) {
928 #ifdef CONFIG_PEERKEY
929 wpa_smk_error(wpa_auth, sm, key);
930 #endif /* CONFIG_PEERKEY */
931 return;
932 } else if (key_info & WPA_KEY_INFO_ERROR) {
933 /* Supplicant reported a Michael MIC error */
934 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
935 "received EAPOL-Key Error Request "
936 "(STA detected Michael MIC failure)");
937 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
938 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
939 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
940 /* Error report is not a request for a new key
941 * handshake, but since Authenticator may do it, let's
942 * change the keys now anyway. */
943 wpa_request_new_ptk(sm);
944 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
945 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
946 "received EAPOL-Key Request for new "
947 "4-Way Handshake");
948 wpa_request_new_ptk(sm);
949 #ifdef CONFIG_PEERKEY
950 } else if (msg == SMK_M1) {
951 wpa_smk_m1(wpa_auth, sm, key);
952 #endif /* CONFIG_PEERKEY */
953 } else if (key_data_length > 0 &&
954 wpa_parse_kde_ies((const u8 *) (key + 1),
955 key_data_length, &kde) == 0 &&
956 kde.mac_addr) {
957 } else {
958 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
959 "received EAPOL-Key Request for GTK "
960 "rekeying");
961 /* FIX: why was this triggering PTK rekeying for the
962 * STA that requested Group Key rekeying?? */
963 /* wpa_request_new_ptk(sta->wpa_sm); */
964 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
965 wpa_rekey_gtk(wpa_auth, NULL);
966 }
967 } else {
968 /* Do not allow the same key replay counter to be reused. This
969 * does also invalidate all other pending replay counters if
970 * retransmissions were used, i.e., we will only process one of
971 * the pending replies and ignore rest if more than one is
972 * received. */
973 sm->key_replay[0].valid = FALSE;
974 }
975
976 #ifdef CONFIG_PEERKEY
977 if (msg == SMK_M3) {
978 wpa_smk_m3(wpa_auth, sm, key);
979 return;
980 }
981 #endif /* CONFIG_PEERKEY */
982
983 os_free(sm->last_rx_eapol_key);
984 sm->last_rx_eapol_key = os_malloc(data_len);
985 if (sm->last_rx_eapol_key == NULL)
986 return;
987 os_memcpy(sm->last_rx_eapol_key, data, data_len);
988 sm->last_rx_eapol_key_len = data_len;
989
990 sm->EAPOLKeyReceived = TRUE;
991 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
992 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
993 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
994 wpa_sm_step(sm);
995 }
996
997
998 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
999 u8 *gtk, size_t gtk_len)
1000 {
1001 u8 data[ETH_ALEN + WPA_NONCE_LEN];
1002
1003 /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
1004 os_memcpy(data, addr, ETH_ALEN);
1005 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1006
1007 #ifdef CONFIG_IEEE80211W
1008 sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
1009 data, sizeof(data), gtk, gtk_len);
1010 #else /* CONFIG_IEEE80211W */
1011 sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
1012 data, sizeof(data), gtk, gtk_len);
1013 #endif /* CONFIG_IEEE80211W */
1014
1015 wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
1016 wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
1017 }
1018
1019
1020 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1021 {
1022 struct wpa_authenticator *wpa_auth = eloop_ctx;
1023 struct wpa_state_machine *sm = timeout_ctx;
1024
1025 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1026 sm->TimeoutEvt = TRUE;
1027 wpa_sm_step(sm);
1028 }
1029
1030
1031 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1032 struct wpa_state_machine *sm, int key_info,
1033 const u8 *key_rsc, const u8 *nonce,
1034 const u8 *kde, size_t kde_len,
1035 int keyidx, int encr, int force_version)
1036 {
1037 struct ieee802_1x_hdr *hdr;
1038 struct wpa_eapol_key *key;
1039 size_t len;
1040 int alg;
1041 int key_data_len, pad_len = 0;
1042 u8 *buf, *pos;
1043 int version, pairwise;
1044 int i;
1045
1046 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
1047
1048 if (force_version)
1049 version = force_version;
1050 else if (wpa_use_aes_cmac(sm))
1051 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1052 else if (sm->pairwise == WPA_CIPHER_CCMP)
1053 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1054 else
1055 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1056
1057 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1058
1059 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1060 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1061 "encr=%d)",
1062 version,
1063 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1064 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1065 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1066 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1067 pairwise, (unsigned long) kde_len, keyidx, encr);
1068
1069 key_data_len = kde_len;
1070
1071 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1072 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1073 pad_len = key_data_len % 8;
1074 if (pad_len)
1075 pad_len = 8 - pad_len;
1076 key_data_len += pad_len + 8;
1077 }
1078
1079 len += key_data_len;
1080
1081 hdr = os_zalloc(len);
1082 if (hdr == NULL)
1083 return;
1084 hdr->version = wpa_auth->conf.eapol_version;
1085 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1086 hdr->length = host_to_be16(len - sizeof(*hdr));
1087 key = (struct wpa_eapol_key *) (hdr + 1);
1088
1089 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1090 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1091 key_info |= version;
1092 if (encr && sm->wpa == WPA_VERSION_WPA2)
1093 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1094 if (sm->wpa != WPA_VERSION_WPA2)
1095 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1096 WPA_PUT_BE16(key->key_info, key_info);
1097
1098 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1099 switch (alg) {
1100 case WPA_CIPHER_CCMP:
1101 WPA_PUT_BE16(key->key_length, 16);
1102 break;
1103 case WPA_CIPHER_TKIP:
1104 WPA_PUT_BE16(key->key_length, 32);
1105 break;
1106 case WPA_CIPHER_WEP40:
1107 WPA_PUT_BE16(key->key_length, 5);
1108 break;
1109 case WPA_CIPHER_WEP104:
1110 WPA_PUT_BE16(key->key_length, 13);
1111 break;
1112 }
1113 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1114 WPA_PUT_BE16(key->key_length, 0);
1115
1116 /* FIX: STSL: what to use as key_replay_counter? */
1117 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1118 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1119 os_memcpy(sm->key_replay[i].counter,
1120 sm->key_replay[i - 1].counter,
1121 WPA_REPLAY_COUNTER_LEN);
1122 }
1123 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1124 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1125 WPA_REPLAY_COUNTER_LEN);
1126 sm->key_replay[0].valid = TRUE;
1127
1128 if (nonce)
1129 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1130
1131 if (key_rsc)
1132 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1133
1134 if (kde && !encr) {
1135 os_memcpy(key + 1, kde, kde_len);
1136 WPA_PUT_BE16(key->key_data_length, kde_len);
1137 } else if (encr && kde) {
1138 buf = os_zalloc(key_data_len);
1139 if (buf == NULL) {
1140 os_free(hdr);
1141 return;
1142 }
1143 pos = buf;
1144 os_memcpy(pos, kde, kde_len);
1145 pos += kde_len;
1146
1147 if (pad_len)
1148 *pos++ = 0xdd;
1149
1150 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1151 buf, key_data_len);
1152 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1153 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1154 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1155 (u8 *) (key + 1))) {
1156 os_free(hdr);
1157 os_free(buf);
1158 return;
1159 }
1160 WPA_PUT_BE16(key->key_data_length, key_data_len);
1161 } else {
1162 u8 ek[32];
1163 os_memcpy(key->key_iv,
1164 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1165 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1166 os_memcpy(ek, key->key_iv, 16);
1167 os_memcpy(ek + 16, sm->PTK.kek, 16);
1168 os_memcpy(key + 1, buf, key_data_len);
1169 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1170 WPA_PUT_BE16(key->key_data_length, key_data_len);
1171 }
1172 os_free(buf);
1173 }
1174
1175 if (key_info & WPA_KEY_INFO_MIC) {
1176 if (!sm->PTK_valid) {
1177 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1178 "PTK not valid when sending EAPOL-Key "
1179 "frame");
1180 os_free(hdr);
1181 return;
1182 }
1183 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1184 key->key_mic);
1185 }
1186
1187 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1188 1);
1189 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1190 sm->pairwise_set);
1191 os_free(hdr);
1192 }
1193
1194
1195 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1196 struct wpa_state_machine *sm, int key_info,
1197 const u8 *key_rsc, const u8 *nonce,
1198 const u8 *kde, size_t kde_len,
1199 int keyidx, int encr)
1200 {
1201 int timeout_ms;
1202 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1203 int ctr;
1204
1205 if (sm == NULL)
1206 return;
1207
1208 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1209 keyidx, encr, 0);
1210
1211 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1212 if (ctr == 1)
1213 timeout_ms = eapol_key_timeout_first;
1214 else
1215 timeout_ms = eapol_key_timeout_subseq;
1216 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1217 wpa_send_eapol_timeout, wpa_auth, sm);
1218 }
1219
1220
1221 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1222 {
1223 struct ieee802_1x_hdr *hdr;
1224 struct wpa_eapol_key *key;
1225 u16 key_info;
1226 int ret = 0;
1227 u8 mic[16];
1228
1229 if (data_len < sizeof(*hdr) + sizeof(*key))
1230 return -1;
1231
1232 hdr = (struct ieee802_1x_hdr *) data;
1233 key = (struct wpa_eapol_key *) (hdr + 1);
1234 key_info = WPA_GET_BE16(key->key_info);
1235 os_memcpy(mic, key->key_mic, 16);
1236 os_memset(key->key_mic, 0, 16);
1237 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1238 data, data_len, key->key_mic) ||
1239 os_memcmp(mic, key->key_mic, 16) != 0)
1240 ret = -1;
1241 os_memcpy(key->key_mic, mic, 16);
1242 return ret;
1243 }
1244
1245
1246 void wpa_remove_ptk(struct wpa_state_machine *sm)
1247 {
1248 sm->PTK_valid = FALSE;
1249 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1250 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, (u8 *) "",
1251 0);
1252 sm->pairwise_set = FALSE;
1253 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1254 }
1255
1256
1257 int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1258 {
1259 int remove_ptk = 1;
1260
1261 if (sm == NULL)
1262 return -1;
1263
1264 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1265 "event %d notification", event);
1266
1267 switch (event) {
1268 case WPA_AUTH:
1269 case WPA_ASSOC:
1270 break;
1271 case WPA_DEAUTH:
1272 case WPA_DISASSOC:
1273 sm->DeauthenticationRequest = TRUE;
1274 break;
1275 case WPA_REAUTH:
1276 case WPA_REAUTH_EAPOL:
1277 if (!sm->started) {
1278 /*
1279 * When using WPS, we may end up here if the STA
1280 * manages to re-associate without the previous STA
1281 * entry getting removed. Consequently, we need to make
1282 * sure that the WPA state machines gets initialized
1283 * properly at this point.
1284 */
1285 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1286 "started - initialize now");
1287 sm->started = 1;
1288 sm->Init = TRUE;
1289 if (wpa_sm_step(sm) == 1)
1290 return 1; /* should not really happen */
1291 sm->Init = FALSE;
1292 sm->AuthenticationRequest = TRUE;
1293 break;
1294 }
1295 if (sm->GUpdateStationKeys) {
1296 /*
1297 * Reauthentication cancels the pending group key
1298 * update for this STA.
1299 */
1300 sm->group->GKeyDoneStations--;
1301 sm->GUpdateStationKeys = FALSE;
1302 sm->PtkGroupInit = TRUE;
1303 }
1304 sm->ReAuthenticationRequest = TRUE;
1305 break;
1306 case WPA_ASSOC_FT:
1307 #ifdef CONFIG_IEEE80211R
1308 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1309 "after association");
1310 wpa_ft_install_ptk(sm);
1311
1312 /* Using FT protocol, not WPA auth state machine */
1313 sm->ft_completed = 1;
1314 return 0;
1315 #else /* CONFIG_IEEE80211R */
1316 break;
1317 #endif /* CONFIG_IEEE80211R */
1318 }
1319
1320 #ifdef CONFIG_IEEE80211R
1321 sm->ft_completed = 0;
1322 #endif /* CONFIG_IEEE80211R */
1323
1324 #ifdef CONFIG_IEEE80211W
1325 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1326 remove_ptk = 0;
1327 #endif /* CONFIG_IEEE80211W */
1328
1329 if (remove_ptk) {
1330 sm->PTK_valid = FALSE;
1331 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1332
1333 if (event != WPA_REAUTH_EAPOL)
1334 wpa_remove_ptk(sm);
1335 }
1336
1337 return wpa_sm_step(sm);
1338 }
1339
1340
1341 static enum wpa_alg wpa_alg_enum(int alg)
1342 {
1343 switch (alg) {
1344 case WPA_CIPHER_CCMP:
1345 return WPA_ALG_CCMP;
1346 case WPA_CIPHER_TKIP:
1347 return WPA_ALG_TKIP;
1348 case WPA_CIPHER_WEP104:
1349 case WPA_CIPHER_WEP40:
1350 return WPA_ALG_WEP;
1351 default:
1352 return WPA_ALG_NONE;
1353 }
1354 }
1355
1356
1357 SM_STATE(WPA_PTK, INITIALIZE)
1358 {
1359 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1360 if (sm->Init) {
1361 /* Init flag is not cleared here, so avoid busy
1362 * loop by claiming nothing changed. */
1363 sm->changed = FALSE;
1364 }
1365
1366 sm->keycount = 0;
1367 if (sm->GUpdateStationKeys)
1368 sm->group->GKeyDoneStations--;
1369 sm->GUpdateStationKeys = FALSE;
1370 if (sm->wpa == WPA_VERSION_WPA)
1371 sm->PInitAKeys = FALSE;
1372 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1373 * Local AA > Remote AA)) */) {
1374 sm->Pair = TRUE;
1375 }
1376 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1377 wpa_remove_ptk(sm);
1378 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1379 sm->TimeoutCtr = 0;
1380 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1381 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1382 WPA_EAPOL_authorized, 0);
1383 }
1384 }
1385
1386
1387 SM_STATE(WPA_PTK, DISCONNECT)
1388 {
1389 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1390 sm->Disconnect = FALSE;
1391 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1392 }
1393
1394
1395 SM_STATE(WPA_PTK, DISCONNECTED)
1396 {
1397 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1398 sm->DeauthenticationRequest = FALSE;
1399 }
1400
1401
1402 SM_STATE(WPA_PTK, AUTHENTICATION)
1403 {
1404 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1405 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1406 sm->PTK_valid = FALSE;
1407 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1408 1);
1409 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1410 sm->AuthenticationRequest = FALSE;
1411 }
1412
1413
1414 SM_STATE(WPA_PTK, AUTHENTICATION2)
1415 {
1416 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1417 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1418 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1419 sm->ReAuthenticationRequest = FALSE;
1420 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1421 * logical place than INITIALIZE since AUTHENTICATION2 can be
1422 * re-entered on ReAuthenticationRequest without going through
1423 * INITIALIZE. */
1424 sm->TimeoutCtr = 0;
1425 }
1426
1427
1428 SM_STATE(WPA_PTK, INITPMK)
1429 {
1430 u8 msk[2 * PMK_LEN];
1431 size_t len = 2 * PMK_LEN;
1432
1433 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1434 #ifdef CONFIG_IEEE80211R
1435 sm->xxkey_len = 0;
1436 #endif /* CONFIG_IEEE80211R */
1437 if (sm->pmksa) {
1438 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1439 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1440 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1441 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1442 "(len=%lu)", (unsigned long) len);
1443 os_memcpy(sm->PMK, msk, PMK_LEN);
1444 #ifdef CONFIG_IEEE80211R
1445 if (len >= 2 * PMK_LEN) {
1446 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1447 sm->xxkey_len = PMK_LEN;
1448 }
1449 #endif /* CONFIG_IEEE80211R */
1450 } else {
1451 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1452 }
1453
1454 sm->req_replay_counter_used = 0;
1455 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1456 * will break reauthentication since EAPOL state machines may not be
1457 * get into AUTHENTICATING state that clears keyRun before WPA state
1458 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1459 * state and takes PMK from the previously used AAA Key. This will
1460 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1461 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1462 * be good workaround for this issue. */
1463 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1464 }
1465
1466
1467 SM_STATE(WPA_PTK, INITPSK)
1468 {
1469 const u8 *psk;
1470 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1471 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1472 if (psk) {
1473 os_memcpy(sm->PMK, psk, PMK_LEN);
1474 #ifdef CONFIG_IEEE80211R
1475 os_memcpy(sm->xxkey, psk, PMK_LEN);
1476 sm->xxkey_len = PMK_LEN;
1477 #endif /* CONFIG_IEEE80211R */
1478 }
1479 sm->req_replay_counter_used = 0;
1480 }
1481
1482
1483 SM_STATE(WPA_PTK, PTKSTART)
1484 {
1485 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1486 size_t pmkid_len = 0;
1487
1488 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1489 sm->PTKRequest = FALSE;
1490 sm->TimeoutEvt = FALSE;
1491
1492 sm->TimeoutCtr++;
1493 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1494 /* No point in sending the EAPOL-Key - we will disconnect
1495 * immediately following this. */
1496 return;
1497 }
1498
1499 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1500 "sending 1/4 msg of 4-Way Handshake");
1501 /*
1502 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1503 * one possible PSK for this STA.
1504 */
1505 if (sm->wpa == WPA_VERSION_WPA2 &&
1506 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1507 pmkid = buf;
1508 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1509 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1510 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1511 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1512 if (sm->pmksa)
1513 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1514 sm->pmksa->pmkid, PMKID_LEN);
1515 else {
1516 /*
1517 * Calculate PMKID since no PMKSA cache entry was
1518 * available with pre-calculated PMKID.
1519 */
1520 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1521 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1522 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1523 }
1524 }
1525 wpa_send_eapol(sm->wpa_auth, sm,
1526 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1527 sm->ANonce, pmkid, pmkid_len, 0, 0);
1528 }
1529
1530
1531 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1532 struct wpa_ptk *ptk)
1533 {
1534 size_t ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
1535 #ifdef CONFIG_IEEE80211R
1536 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1537 return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
1538 #endif /* CONFIG_IEEE80211R */
1539
1540 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1541 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1542 (u8 *) ptk, ptk_len,
1543 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1544
1545 return 0;
1546 }
1547
1548
1549 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1550 {
1551 struct wpa_ptk PTK;
1552 int ok = 0;
1553 const u8 *pmk = NULL;
1554
1555 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1556 sm->EAPOLKeyReceived = FALSE;
1557
1558 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1559 * WPA-PSK: iterate through possible PSKs and select the one matching
1560 * the packet */
1561 for (;;) {
1562 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1563 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1564 if (pmk == NULL)
1565 break;
1566 } else
1567 pmk = sm->PMK;
1568
1569 wpa_derive_ptk(sm, pmk, &PTK);
1570
1571 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1572 sm->last_rx_eapol_key_len) == 0) {
1573 ok = 1;
1574 break;
1575 }
1576
1577 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1578 break;
1579 }
1580
1581 if (!ok) {
1582 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1583 "invalid MIC in msg 2/4 of 4-Way Handshake");
1584 return;
1585 }
1586
1587 #ifdef CONFIG_IEEE80211R
1588 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1589 /*
1590 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
1591 * with the value we derived.
1592 */
1593 if (os_memcmp(sm->sup_pmk_r1_name, sm->pmk_r1_name,
1594 WPA_PMK_NAME_LEN) != 0) {
1595 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1596 "PMKR1Name mismatch in FT 4-way "
1597 "handshake");
1598 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
1599 "Supplicant",
1600 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
1601 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
1602 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
1603 return;
1604 }
1605 }
1606 #endif /* CONFIG_IEEE80211R */
1607
1608 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1609
1610 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1611 /* PSK may have changed from the previous choice, so update
1612 * state machine data based on whatever PSK was selected here.
1613 */
1614 os_memcpy(sm->PMK, pmk, PMK_LEN);
1615 }
1616
1617 sm->MICVerified = TRUE;
1618
1619 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1620 sm->PTK_valid = TRUE;
1621 }
1622
1623
1624 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1625 {
1626 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1627 sm->TimeoutCtr = 0;
1628 }
1629
1630
1631 #ifdef CONFIG_IEEE80211W
1632
1633 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1634 {
1635 if (sm->mgmt_frame_prot) {
1636 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1637 }
1638
1639 return 0;
1640 }
1641
1642
1643 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1644 {
1645 struct wpa_igtk_kde igtk;
1646 struct wpa_group *gsm = sm->group;
1647
1648 if (!sm->mgmt_frame_prot)
1649 return pos;
1650
1651 igtk.keyid[0] = gsm->GN_igtk;
1652 igtk.keyid[1] = 0;
1653 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
1654 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn) < 0)
1655 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1656 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1657 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1658 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1659
1660 return pos;
1661 }
1662
1663 #else /* CONFIG_IEEE80211W */
1664
1665 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1666 {
1667 return 0;
1668 }
1669
1670
1671 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1672 {
1673 return pos;
1674 }
1675
1676 #endif /* CONFIG_IEEE80211W */
1677
1678
1679 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1680 {
1681 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1682 size_t gtk_len, kde_len;
1683 struct wpa_group *gsm = sm->group;
1684 u8 *wpa_ie;
1685 int wpa_ie_len, secure, keyidx, encr = 0;
1686
1687 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1688 sm->TimeoutEvt = FALSE;
1689
1690 sm->TimeoutCtr++;
1691 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1692 /* No point in sending the EAPOL-Key - we will disconnect
1693 * immediately following this. */
1694 return;
1695 }
1696
1697 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
1698 GTK[GN], IGTK, [FTIE], [TIE * 2])
1699 */
1700 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1701 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1702 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
1703 wpa_ie = sm->wpa_auth->wpa_ie;
1704 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1705 if (sm->wpa == WPA_VERSION_WPA &&
1706 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1707 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1708 /* WPA-only STA, remove RSN IE */
1709 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1710 wpa_ie_len = wpa_ie[1] + 2;
1711 }
1712 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1713 "sending 3/4 msg of 4-Way Handshake");
1714 if (sm->wpa == WPA_VERSION_WPA2) {
1715 /* WPA2 send GTK in the 4-way handshake */
1716 secure = 1;
1717 gtk = gsm->GTK[gsm->GN - 1];
1718 gtk_len = gsm->GTK_len;
1719 keyidx = gsm->GN;
1720 _rsc = rsc;
1721 encr = 1;
1722 } else {
1723 /* WPA does not include GTK in msg 3/4 */
1724 secure = 0;
1725 gtk = NULL;
1726 gtk_len = 0;
1727 keyidx = 0;
1728 _rsc = NULL;
1729 }
1730
1731 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1732 if (gtk)
1733 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1734 #ifdef CONFIG_IEEE80211R
1735 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1736 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
1737 kde_len += 300; /* FTIE + 2 * TIE */
1738 }
1739 #endif /* CONFIG_IEEE80211R */
1740 kde = os_malloc(kde_len);
1741 if (kde == NULL)
1742 return;
1743
1744 pos = kde;
1745 os_memcpy(pos, wpa_ie, wpa_ie_len);
1746 pos += wpa_ie_len;
1747 #ifdef CONFIG_IEEE80211R
1748 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1749 int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
1750 if (res < 0) {
1751 wpa_printf(MSG_ERROR, "FT: Failed to insert "
1752 "PMKR1Name into RSN IE in EAPOL-Key data");
1753 os_free(kde);
1754 return;
1755 }
1756 pos += res;
1757 }
1758 #endif /* CONFIG_IEEE80211R */
1759 if (gtk) {
1760 u8 hdr[2];
1761 hdr[0] = keyidx & 0x03;
1762 hdr[1] = 0;
1763 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1764 gtk, gtk_len);
1765 }
1766 pos = ieee80211w_kde_add(sm, pos);
1767
1768 #ifdef CONFIG_IEEE80211R
1769 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1770 int res;
1771 struct wpa_auth_config *conf;
1772
1773 conf = &sm->wpa_auth->conf;
1774 res = wpa_write_ftie(conf, conf->r0_key_holder,
1775 conf->r0_key_holder_len,
1776 NULL, NULL, pos, kde + kde_len - pos,
1777 NULL, 0);
1778 if (res < 0) {
1779 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
1780 "into EAPOL-Key Key Data");
1781 os_free(kde);
1782 return;
1783 }
1784 pos += res;
1785
1786 /* TIE[ReassociationDeadline] (TU) */
1787 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1788 *pos++ = 5;
1789 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
1790 WPA_PUT_LE32(pos, conf->reassociation_deadline);
1791 pos += 4;
1792
1793 /* TIE[KeyLifetime] (seconds) */
1794 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
1795 *pos++ = 5;
1796 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
1797 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
1798 pos += 4;
1799 }
1800 #endif /* CONFIG_IEEE80211R */
1801
1802 wpa_send_eapol(sm->wpa_auth, sm,
1803 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1804 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1805 WPA_KEY_INFO_KEY_TYPE,
1806 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1807 os_free(kde);
1808 }
1809
1810
1811 SM_STATE(WPA_PTK, PTKINITDONE)
1812 {
1813 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1814 sm->EAPOLKeyReceived = FALSE;
1815 if (sm->Pair) {
1816 enum wpa_alg alg;
1817 int klen;
1818 if (sm->pairwise == WPA_CIPHER_TKIP) {
1819 alg = WPA_ALG_TKIP;
1820 klen = 32;
1821 } else {
1822 alg = WPA_ALG_CCMP;
1823 klen = 16;
1824 }
1825 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1826 sm->PTK.tk1, klen)) {
1827 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1828 return;
1829 }
1830 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1831 sm->pairwise_set = TRUE;
1832
1833 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1834 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1835 eloop_register_timeout(sm->wpa_auth->conf.
1836 wpa_ptk_rekey, 0, wpa_rekey_ptk,
1837 sm->wpa_auth, sm);
1838 }
1839
1840 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1841 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1842 WPA_EAPOL_authorized, 1);
1843 }
1844 }
1845
1846 if (0 /* IBSS == TRUE */) {
1847 sm->keycount++;
1848 if (sm->keycount == 2) {
1849 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1850 WPA_EAPOL_portValid, 1);
1851 }
1852 } else {
1853 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1854 1);
1855 }
1856 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1857 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1858 if (sm->wpa == WPA_VERSION_WPA)
1859 sm->PInitAKeys = TRUE;
1860 else
1861 sm->has_GTK = TRUE;
1862 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1863 "pairwise key handshake completed (%s)",
1864 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1865
1866 #ifdef CONFIG_IEEE80211R
1867 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1868 #endif /* CONFIG_IEEE80211R */
1869 }
1870
1871
1872 SM_STEP(WPA_PTK)
1873 {
1874 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1875
1876 if (sm->Init)
1877 SM_ENTER(WPA_PTK, INITIALIZE);
1878 else if (sm->Disconnect
1879 /* || FIX: dot11RSNAConfigSALifetime timeout */)
1880 SM_ENTER(WPA_PTK, DISCONNECT);
1881 else if (sm->DeauthenticationRequest)
1882 SM_ENTER(WPA_PTK, DISCONNECTED);
1883 else if (sm->AuthenticationRequest)
1884 SM_ENTER(WPA_PTK, AUTHENTICATION);
1885 else if (sm->ReAuthenticationRequest)
1886 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1887 else if (sm->PTKRequest)
1888 SM_ENTER(WPA_PTK, PTKSTART);
1889 else switch (sm->wpa_ptk_state) {
1890 case WPA_PTK_INITIALIZE:
1891 break;
1892 case WPA_PTK_DISCONNECT:
1893 SM_ENTER(WPA_PTK, DISCONNECTED);
1894 break;
1895 case WPA_PTK_DISCONNECTED:
1896 SM_ENTER(WPA_PTK, INITIALIZE);
1897 break;
1898 case WPA_PTK_AUTHENTICATION:
1899 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1900 break;
1901 case WPA_PTK_AUTHENTICATION2:
1902 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1903 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1904 WPA_EAPOL_keyRun) > 0)
1905 SM_ENTER(WPA_PTK, INITPMK);
1906 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1907 /* FIX: && 802.1X::keyRun */)
1908 SM_ENTER(WPA_PTK, INITPSK);
1909 break;
1910 case WPA_PTK_INITPMK:
1911 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1912 WPA_EAPOL_keyAvailable) > 0)
1913 SM_ENTER(WPA_PTK, PTKSTART);
1914 else {
1915 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1916 SM_ENTER(WPA_PTK, DISCONNECT);
1917 }
1918 break;
1919 case WPA_PTK_INITPSK:
1920 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1921 SM_ENTER(WPA_PTK, PTKSTART);
1922 else {
1923 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1924 "no PSK configured for the STA");
1925 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1926 SM_ENTER(WPA_PTK, DISCONNECT);
1927 }
1928 break;
1929 case WPA_PTK_PTKSTART:
1930 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1931 sm->EAPOLKeyPairwise)
1932 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1933 else if (sm->TimeoutCtr >
1934 (int) dot11RSNAConfigPairwiseUpdateCount) {
1935 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1936 SM_ENTER(WPA_PTK, DISCONNECT);
1937 } else if (sm->TimeoutEvt)
1938 SM_ENTER(WPA_PTK, PTKSTART);
1939 break;
1940 case WPA_PTK_PTKCALCNEGOTIATING:
1941 if (sm->MICVerified)
1942 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1943 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1944 sm->EAPOLKeyPairwise)
1945 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1946 else if (sm->TimeoutEvt)
1947 SM_ENTER(WPA_PTK, PTKSTART);
1948 break;
1949 case WPA_PTK_PTKCALCNEGOTIATING2:
1950 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1951 break;
1952 case WPA_PTK_PTKINITNEGOTIATING:
1953 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1954 sm->EAPOLKeyPairwise && sm->MICVerified)
1955 SM_ENTER(WPA_PTK, PTKINITDONE);
1956 else if (sm->TimeoutCtr >
1957 (int) dot11RSNAConfigPairwiseUpdateCount) {
1958 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1959 SM_ENTER(WPA_PTK, DISCONNECT);
1960 } else if (sm->TimeoutEvt)
1961 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1962 break;
1963 case WPA_PTK_PTKINITDONE:
1964 break;
1965 }
1966 }
1967
1968
1969 SM_STATE(WPA_PTK_GROUP, IDLE)
1970 {
1971 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1972 if (sm->Init) {
1973 /* Init flag is not cleared here, so avoid busy
1974 * loop by claiming nothing changed. */
1975 sm->changed = FALSE;
1976 }
1977 sm->GTimeoutCtr = 0;
1978 }
1979
1980
1981 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1982 {
1983 u8 rsc[WPA_KEY_RSC_LEN];
1984 struct wpa_group *gsm = sm->group;
1985 u8 *kde, *pos, hdr[2];
1986 size_t kde_len;
1987
1988 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1989
1990 sm->GTimeoutCtr++;
1991 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
1992 /* No point in sending the EAPOL-Key - we will disconnect
1993 * immediately following this. */
1994 return;
1995 }
1996
1997 if (sm->wpa == WPA_VERSION_WPA)
1998 sm->PInitAKeys = FALSE;
1999 sm->TimeoutEvt = FALSE;
2000 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2001 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2002 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2003 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2004 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2005 "sending 1/2 msg of Group Key Handshake");
2006
2007 if (sm->wpa == WPA_VERSION_WPA2) {
2008 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2009 ieee80211w_kde_len(sm);
2010 kde = os_malloc(kde_len);
2011 if (kde == NULL)
2012 return;
2013
2014 pos = kde;
2015 hdr[0] = gsm->GN & 0x03;
2016 hdr[1] = 0;
2017 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2018 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2019 pos = ieee80211w_kde_add(sm, pos);
2020 } else {
2021 kde = gsm->GTK[gsm->GN - 1];
2022 pos = kde + gsm->GTK_len;
2023 }
2024
2025 wpa_send_eapol(sm->wpa_auth, sm,
2026 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2027 WPA_KEY_INFO_ACK |
2028 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2029 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
2030 if (sm->wpa == WPA_VERSION_WPA2)
2031 os_free(kde);
2032 }
2033
2034
2035 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2036 {
2037 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2038 sm->EAPOLKeyReceived = FALSE;
2039 if (sm->GUpdateStationKeys)
2040 sm->group->GKeyDoneStations--;
2041 sm->GUpdateStationKeys = FALSE;
2042 sm->GTimeoutCtr = 0;
2043 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2044 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2045 "group key handshake completed (%s)",
2046 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2047 sm->has_GTK = TRUE;
2048 }
2049
2050
2051 SM_STATE(WPA_PTK_GROUP, KEYERROR)
2052 {
2053 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2054 if (sm->GUpdateStationKeys)
2055 sm->group->GKeyDoneStations--;
2056 sm->GUpdateStationKeys = FALSE;
2057 sm->Disconnect = TRUE;
2058 }
2059
2060
2061 SM_STEP(WPA_PTK_GROUP)
2062 {
2063 if (sm->Init || sm->PtkGroupInit) {
2064 SM_ENTER(WPA_PTK_GROUP, IDLE);
2065 sm->PtkGroupInit = FALSE;
2066 } else switch (sm->wpa_ptk_group_state) {
2067 case WPA_PTK_GROUP_IDLE:
2068 if (sm->GUpdateStationKeys ||
2069 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2070 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2071 break;
2072 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2073 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2074 !sm->EAPOLKeyPairwise && sm->MICVerified)
2075 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2076 else if (sm->GTimeoutCtr >
2077 (int) dot11RSNAConfigGroupUpdateCount)
2078 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2079 else if (sm->TimeoutEvt)
2080 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2081 break;
2082 case WPA_PTK_GROUP_KEYERROR:
2083 SM_ENTER(WPA_PTK_GROUP, IDLE);
2084 break;
2085 case WPA_PTK_GROUP_REKEYESTABLISHED:
2086 SM_ENTER(WPA_PTK_GROUP, IDLE);
2087 break;
2088 }
2089 }
2090
2091
2092 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2093 struct wpa_group *group)
2094 {
2095 int ret = 0;
2096
2097 /* FIX: is this the correct way of getting GNonce? */
2098 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2099 inc_byte_array(group->Counter, WPA_NONCE_LEN);
2100 wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
2101 group->GTK[group->GN - 1], group->GTK_len);
2102
2103 #ifdef CONFIG_IEEE80211W
2104 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2105 if (os_get_random(group->IGTK[group->GN_igtk - 4],
2106 WPA_IGTK_LEN) < 0) {
2107 wpa_printf(MSG_INFO, "RSN: Failed to get new random "
2108 "IGTK");
2109 ret = -1;
2110 }
2111 wpa_hexdump_key(MSG_DEBUG, "IGTK",
2112 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
2113 }
2114 #endif /* CONFIG_IEEE80211W */
2115
2116 return ret;
2117 }
2118
2119
2120 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2121 struct wpa_group *group)
2122 {
2123 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2124 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2125 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2126 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2127
2128 /* GTK[0..N] = 0 */
2129 os_memset(group->GTK, 0, sizeof(group->GTK));
2130 group->GN = 1;
2131 group->GM = 2;
2132 #ifdef CONFIG_IEEE80211W
2133 group->GN_igtk = 4;
2134 group->GM_igtk = 5;
2135 #endif /* CONFIG_IEEE80211W */
2136 /* GTK[GN] = CalcGTK() */
2137 wpa_gtk_update(wpa_auth, group);
2138 }
2139
2140
2141 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2142 {
2143 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2144 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2145 "Not in PTKINITDONE; skip Group Key update");
2146 return 0;
2147 }
2148 if (sm->GUpdateStationKeys) {
2149 /*
2150 * This should not really happen, but just in case, make sure
2151 * we do not count the same STA twice in GKeyDoneStations.
2152 */
2153 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2154 "GUpdateStationKeys already set - do not "
2155 "increment GKeyDoneStations");
2156 } else {
2157 sm->group->GKeyDoneStations++;
2158 sm->GUpdateStationKeys = TRUE;
2159 }
2160 wpa_sm_step(sm);
2161 return 0;
2162 }
2163
2164
2165 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2166 struct wpa_group *group)
2167 {
2168 int tmp;
2169
2170 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2171 "SETKEYS (VLAN-ID %d)", group->vlan_id);
2172 group->changed = TRUE;
2173 group->wpa_group_state = WPA_GROUP_SETKEYS;
2174 group->GTKReKey = FALSE;
2175 tmp = group->GM;
2176 group->GM = group->GN;
2177 group->GN = tmp;
2178 #ifdef CONFIG_IEEE80211W
2179 tmp = group->GM_igtk;
2180 group->GM_igtk = group->GN_igtk;
2181 group->GN_igtk = tmp;
2182 #endif /* CONFIG_IEEE80211W */
2183 /* "GKeyDoneStations = GNoStations" is done in more robust way by
2184 * counting the STAs that are marked with GUpdateStationKeys instead of
2185 * including all STAs that could be in not-yet-completed state. */
2186 wpa_gtk_update(wpa_auth, group);
2187
2188 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
2189 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2190 group->GKeyDoneStations);
2191 }
2192
2193
2194 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2195 struct wpa_group *group)
2196 {
2197 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2198 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2199 group->changed = TRUE;
2200 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2201 wpa_auth_set_key(wpa_auth, group->vlan_id,
2202 wpa_alg_enum(wpa_auth->conf.wpa_group),
2203 NULL, group->GN, group->GTK[group->GN - 1],
2204 group->GTK_len);
2205
2206 #ifdef CONFIG_IEEE80211W
2207 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2208 wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK,
2209 NULL, group->GN_igtk,
2210 group->IGTK[group->GN_igtk - 4],
2211 WPA_IGTK_LEN);
2212 }
2213 #endif /* CONFIG_IEEE80211W */
2214 }
2215
2216
2217 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2218 struct wpa_group *group)
2219 {
2220 if (group->GInit) {
2221 wpa_group_gtk_init(wpa_auth, group);
2222 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2223 group->GTKAuthenticator) {
2224 wpa_group_setkeysdone(wpa_auth, group);
2225 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2226 group->GTKReKey) {
2227 wpa_group_setkeys(wpa_auth, group);
2228 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2229 if (group->GKeyDoneStations == 0)
2230 wpa_group_setkeysdone(wpa_auth, group);
2231 else if (group->GTKReKey)
2232 wpa_group_setkeys(wpa_auth, group);
2233 }
2234 }
2235
2236
2237 static int wpa_sm_step(struct wpa_state_machine *sm)
2238 {
2239 if (sm == NULL)
2240 return 0;
2241
2242 if (sm->in_step_loop) {
2243 /* This should not happen, but if it does, make sure we do not
2244 * end up freeing the state machine too early by exiting the
2245 * recursive call. */
2246 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2247 return 0;
2248 }
2249
2250 sm->in_step_loop = 1;
2251 do {
2252 if (sm->pending_deinit)
2253 break;
2254
2255 sm->changed = FALSE;
2256 sm->wpa_auth->group->changed = FALSE;
2257
2258 SM_STEP_RUN(WPA_PTK);
2259 if (sm->pending_deinit)
2260 break;
2261 SM_STEP_RUN(WPA_PTK_GROUP);
2262 if (sm->pending_deinit)
2263 break;
2264 wpa_group_sm_step(sm->wpa_auth, sm->group);
2265 } while (sm->changed || sm->wpa_auth->group->changed);
2266 sm->in_step_loop = 0;
2267
2268 if (sm->pending_deinit) {
2269 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2270 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2271 wpa_free_sta_sm(sm);
2272 return 1;
2273 }
2274 return 0;
2275 }
2276
2277
2278 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2279 {
2280 struct wpa_state_machine *sm = eloop_ctx;
2281 wpa_sm_step(sm);
2282 }
2283
2284
2285 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2286 {
2287 if (sm == NULL)
2288 return;
2289 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2290 }
2291
2292
2293 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2294 {
2295 int tmp, i;
2296 struct wpa_group *group;
2297
2298 if (wpa_auth == NULL)
2299 return;
2300
2301 group = wpa_auth->group;
2302
2303 for (i = 0; i < 2; i++) {
2304 tmp = group->GM;
2305 group->GM = group->GN;
2306 group->GN = tmp;
2307 #ifdef CONFIG_IEEE80211W
2308 tmp = group->GM_igtk;
2309 group->GM_igtk = group->GN_igtk;
2310 group->GN_igtk = tmp;
2311 #endif /* CONFIG_IEEE80211W */
2312 wpa_gtk_update(wpa_auth, group);
2313 }
2314 }
2315
2316
2317 static const char * wpa_bool_txt(int bool)
2318 {
2319 return bool ? "TRUE" : "FALSE";
2320 }
2321
2322
2323 static int wpa_cipher_bits(int cipher)
2324 {
2325 switch (cipher) {
2326 case WPA_CIPHER_CCMP:
2327 return 128;
2328 case WPA_CIPHER_TKIP:
2329 return 256;
2330 case WPA_CIPHER_WEP104:
2331 return 104;
2332 case WPA_CIPHER_WEP40:
2333 return 40;
2334 default:
2335 return 0;
2336 }
2337 }
2338
2339
2340 #define RSN_SUITE "%02x-%02x-%02x-%d"
2341 #define RSN_SUITE_ARG(s) \
2342 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2343
2344 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2345 {
2346 int len = 0, ret;
2347 char pmkid_txt[PMKID_LEN * 2 + 1];
2348
2349 if (wpa_auth == NULL)
2350 return len;
2351
2352 ret = os_snprintf(buf + len, buflen - len,
2353 "dot11RSNAOptionImplemented=TRUE\n"
2354 #ifdef CONFIG_RSN_PREAUTH
2355 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2356 #else /* CONFIG_RSN_PREAUTH */
2357 "dot11RSNAPreauthenticationImplemented=FALSE\n"
2358 #endif /* CONFIG_RSN_PREAUTH */
2359 "dot11RSNAEnabled=%s\n"
2360 "dot11RSNAPreauthenticationEnabled=%s\n",
2361 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2362 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2363 if (ret < 0 || (size_t) ret >= buflen - len)
2364 return len;
2365 len += ret;
2366
2367 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2368 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2369
2370 ret = os_snprintf(
2371 buf + len, buflen - len,
2372 "dot11RSNAConfigVersion=%u\n"
2373 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2374 /* FIX: dot11RSNAConfigGroupCipher */
2375 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2376 /* FIX: dot11RSNAConfigGroupRekeyTime */
2377 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2378 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2379 "dot11RSNAConfigGroupUpdateCount=%u\n"
2380 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2381 "dot11RSNAConfigGroupCipherSize=%u\n"
2382 "dot11RSNAConfigPMKLifetime=%u\n"
2383 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2384 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2385 "dot11RSNAConfigSATimeout=%u\n"
2386 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2387 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2388 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2389 "dot11RSNAPMKIDUsed=%s\n"
2390 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2391 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2392 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2393 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2394 "dot11RSNA4WayHandshakeFailures=%u\n"
2395 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2396 RSN_VERSION,
2397 !!wpa_auth->conf.wpa_strict_rekey,
2398 dot11RSNAConfigGroupUpdateCount,
2399 dot11RSNAConfigPairwiseUpdateCount,
2400 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2401 dot11RSNAConfigPMKLifetime,
2402 dot11RSNAConfigPMKReauthThreshold,
2403 dot11RSNAConfigSATimeout,
2404 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2405 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2406 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2407 pmkid_txt,
2408 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2409 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2410 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2411 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2412 wpa_auth->dot11RSNA4WayHandshakeFailures);
2413 if (ret < 0 || (size_t) ret >= buflen - len)
2414 return len;
2415 len += ret;
2416
2417 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2418 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2419
2420 /* Private MIB */
2421 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2422 wpa_auth->group->wpa_group_state);
2423 if (ret < 0 || (size_t) ret >= buflen - len)
2424 return len;
2425 len += ret;
2426
2427 return len;
2428 }
2429
2430
2431 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2432 {
2433 int len = 0, ret;
2434 u32 pairwise = 0;
2435
2436 if (sm == NULL)
2437 return 0;
2438
2439 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2440
2441 /* dot11RSNAStatsEntry */
2442
2443 if (sm->wpa == WPA_VERSION_WPA) {
2444 if (sm->pairwise == WPA_CIPHER_CCMP)
2445 pairwise = WPA_CIPHER_SUITE_CCMP;
2446 else if (sm->pairwise == WPA_CIPHER_TKIP)
2447 pairwise = WPA_CIPHER_SUITE_TKIP;
2448 else if (sm->pairwise == WPA_CIPHER_WEP104)
2449 pairwise = WPA_CIPHER_SUITE_WEP104;
2450 else if (sm->pairwise == WPA_CIPHER_WEP40)
2451 pairwise = WPA_CIPHER_SUITE_WEP40;
2452 else if (sm->pairwise == WPA_CIPHER_NONE)
2453 pairwise = WPA_CIPHER_SUITE_NONE;
2454 } else if (sm->wpa == WPA_VERSION_WPA2) {
2455 if (sm->pairwise == WPA_CIPHER_CCMP)
2456 pairwise = RSN_CIPHER_SUITE_CCMP;
2457 else if (sm->pairwise == WPA_CIPHER_TKIP)
2458 pairwise = RSN_CIPHER_SUITE_TKIP;
2459 else if (sm->pairwise == WPA_CIPHER_WEP104)
2460 pairwise = RSN_CIPHER_SUITE_WEP104;
2461 else if (sm->pairwise == WPA_CIPHER_WEP40)
2462 pairwise = RSN_CIPHER_SUITE_WEP40;
2463 else if (sm->pairwise == WPA_CIPHER_NONE)
2464 pairwise = RSN_CIPHER_SUITE_NONE;
2465 } else
2466 return 0;
2467
2468 ret = os_snprintf(
2469 buf + len, buflen - len,
2470 /* TODO: dot11RSNAStatsIndex */
2471 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2472 "dot11RSNAStatsVersion=1\n"
2473 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2474 /* TODO: dot11RSNAStatsTKIPICVErrors */
2475 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2476 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2477 /* TODO: dot11RSNAStatsCCMPReplays */
2478 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2479 /* TODO: dot11RSNAStatsTKIPReplays */,
2480 MAC2STR(sm->addr),
2481 RSN_SUITE_ARG(pairwise),
2482 sm->dot11RSNAStatsTKIPLocalMICFailures,
2483 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2484 if (ret < 0 || (size_t) ret >= buflen - len)
2485 return len;
2486 len += ret;
2487
2488 /* Private MIB */
2489 ret = os_snprintf(buf + len, buflen - len,
2490 "hostapdWPAPTKState=%d\n"
2491 "hostapdWPAPTKGroupState=%d\n",
2492 sm->wpa_ptk_state,
2493 sm->wpa_ptk_group_state);
2494 if (ret < 0 || (size_t) ret >= buflen - len)
2495 return len;
2496 len += ret;
2497
2498 return len;
2499 }
2500
2501
2502 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2503 {
2504 if (wpa_auth)
2505 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2506 }
2507
2508
2509 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2510 {
2511 return sm && sm->pairwise_set;
2512 }
2513
2514
2515 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2516 {
2517 return sm->pairwise;
2518 }
2519
2520
2521 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2522 {
2523 if (sm == NULL)
2524 return -1;
2525 return sm->wpa_key_mgmt;
2526 }
2527
2528
2529 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2530 {
2531 if (sm == NULL)
2532 return 0;
2533 return sm->wpa;
2534 }
2535
2536
2537 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2538 struct rsn_pmksa_cache_entry *entry)
2539 {
2540 if (sm == NULL || sm->pmksa != entry)
2541 return -1;
2542 sm->pmksa = NULL;
2543 return 0;
2544 }
2545
2546
2547 struct rsn_pmksa_cache_entry *
2548 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2549 {
2550 return sm ? sm->pmksa : NULL;
2551 }
2552
2553
2554 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2555 {
2556 if (sm)
2557 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2558 }
2559
2560
2561 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2562 {
2563 if (wpa_auth == NULL)
2564 return NULL;
2565 *len = wpa_auth->wpa_ie_len;
2566 return wpa_auth->wpa_ie;
2567 }
2568
2569
2570 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2571 int session_timeout, struct eapol_state_machine *eapol)
2572 {
2573 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2574 return -1;
2575
2576 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2577 sm->wpa_auth->addr, sm->addr, session_timeout,
2578 eapol, sm->wpa_key_mgmt))
2579 return 0;
2580
2581 return -1;
2582 }
2583
2584
2585 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2586 const u8 *pmk, size_t len, const u8 *sta_addr,
2587 int session_timeout,
2588 struct eapol_state_machine *eapol)
2589 {
2590 if (wpa_auth == NULL)
2591 return -1;
2592
2593 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2594 sta_addr, session_timeout, eapol,
2595 WPA_KEY_MGMT_IEEE8021X))
2596 return 0;
2597
2598 return -1;
2599 }
2600
2601
2602 static struct wpa_group *
2603 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2604 {
2605 struct wpa_group *group;
2606
2607 if (wpa_auth == NULL || wpa_auth->group == NULL)
2608 return NULL;
2609
2610 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2611 vlan_id);
2612 group = wpa_group_init(wpa_auth, vlan_id);
2613 if (group == NULL)
2614 return NULL;
2615
2616 group->next = wpa_auth->group->next;
2617 wpa_auth->group->next = group;
2618
2619 return group;
2620 }
2621
2622
2623 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2624 {
2625 struct wpa_group *group;
2626
2627 if (sm == NULL || sm->wpa_auth == NULL)
2628 return 0;
2629
2630 group = sm->wpa_auth->group;
2631 while (group) {
2632 if (group->vlan_id == vlan_id)
2633 break;
2634 group = group->next;
2635 }
2636
2637 if (group == NULL) {
2638 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2639 if (group == NULL)
2640 return -1;
2641 }
2642
2643 if (sm->group == group)
2644 return 0;
2645
2646 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2647 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2648
2649 sm->group = group;
2650 return 0;
2651 }
Mirror of AROS' svn.