2 * hostapd - IEEE 802.11i-2004 / WPA Authenticator
3 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
17 #ifndef CONFIG_NATIVE_WINDOWS
29 #include "ieee802_11.h"
30 #include "pmksa_cache.h"
31 #include "state_machine.h"
32 #include "wpa_auth_i.h"
33 #include "wpa_auth_ie.h"
35 #define STATE_MACHINE_DATA struct wpa_state_machine
36 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
37 #define STATE_MACHINE_ADDR sm->addr
40 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
41 static void wpa_sm_step(struct wpa_state_machine *sm);
42 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
43 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
44 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
45 struct wpa_group *group);
46 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
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 */
53 /* TODO: make these configurable */
54 static const int dot11RSNAConfigPMKLifetime = 43200;
55 static const int dot11RSNAConfigPMKReauthThreshold = 70;
56 static const int dot11RSNAConfigSATimeout = 60;
59 static inline void wpa_auth_mic_failure_report(
60 struct wpa_authenticator *wpa_auth, const u8 *addr)
62 if (wpa_auth->cb.mic_failure_report)
63 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
67 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
68 const u8 *addr, wpa_eapol_variable var,
71 if (wpa_auth->cb.set_eapol)
72 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
76 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
77 const u8 *addr, wpa_eapol_variable var)
79 if (wpa_auth->cb.get_eapol == NULL)
81 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
85 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
86 const u8 *addr, const u8 *prev_psk)
88 if (wpa_auth->cb.get_psk == NULL)
90 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
94 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
95 const u8 *addr, u8 *msk, size_t *len)
97 if (wpa_auth->cb.get_msk == NULL)
99 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
103 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
105 wpa_alg alg, const u8 *addr, int idx,
106 u8 *key, size_t key_len)
108 if (wpa_auth->cb.set_key == NULL)
110 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
115 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
116 const u8 *addr, int idx, u8 *seq)
118 if (wpa_auth->cb.get_seqnum == NULL)
120 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
124 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
125 const u8 *addr, int idx, u8 *seq)
127 if (wpa_auth->cb.get_seqnum_igtk == NULL)
129 return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
134 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
135 const u8 *data, size_t data_len, int encrypt)
137 if (wpa_auth->cb.send_eapol == NULL)
139 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
144 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
145 int (*cb)(struct wpa_state_machine *sm, void *ctx),
148 if (wpa_auth->cb.for_each_sta == NULL)
150 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
154 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
155 int (*cb)(struct wpa_authenticator *a, void *ctx),
158 if (wpa_auth->cb.for_each_auth == NULL)
160 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
164 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
165 logger_level level, const char *txt)
167 if (wpa_auth->cb.logger == NULL)
169 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
173 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
174 logger_level level, const char *fmt, ...)
180 if (wpa_auth->cb.logger == NULL)
183 maxlen = os_strlen(fmt) + 100;
184 format = os_malloc(maxlen);
189 vsnprintf(format, maxlen, fmt, ap);
192 wpa_auth_logger(wpa_auth, addr, level, format);
198 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
201 if (wpa_auth->cb.disconnect == NULL)
203 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
204 WLAN_REASON_PREV_AUTH_NOT_VALID);
208 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
211 #ifdef CONFIG_IEEE80211R
212 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
214 #endif /* CONFIG_IEEE80211R */
215 #ifdef CONFIG_IEEE80211W
216 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
218 #endif /* CONFIG_IEEE80211W */
223 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
225 struct wpa_authenticator *wpa_auth = eloop_ctx;
227 if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
228 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
231 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
234 if (wpa_auth->conf.wpa_gmk_rekey) {
235 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
236 wpa_rekey_gmk, wpa_auth, NULL);
241 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
243 struct wpa_authenticator *wpa_auth = eloop_ctx;
244 struct wpa_group *group;
246 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
247 for (group = wpa_auth->group; group; group = group->next) {
248 group->GTKReKey = TRUE;
250 group->changed = FALSE;
251 wpa_group_sm_step(wpa_auth, group);
252 } while (group->changed);
255 if (wpa_auth->conf.wpa_group_rekey) {
256 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
257 0, wpa_rekey_gtk, wpa_auth, NULL);
262 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
264 struct wpa_authenticator *wpa_auth = eloop_ctx;
265 struct wpa_state_machine *sm = timeout_ctx;
267 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
268 wpa_request_new_ptk(sm);
273 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
275 if (sm->pmksa == ctx)
281 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
284 struct wpa_authenticator *wpa_auth = ctx;
285 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
289 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
292 struct wpa_group *group;
293 u8 buf[ETH_ALEN + 8 + sizeof(group)];
296 group = os_zalloc(sizeof(struct wpa_group));
300 group->GTKAuthenticator = TRUE;
301 group->vlan_id = vlan_id;
303 switch (wpa_auth->conf.wpa_group) {
304 case WPA_CIPHER_CCMP:
307 case WPA_CIPHER_TKIP:
310 case WPA_CIPHER_WEP104:
313 case WPA_CIPHER_WEP40:
318 /* Counter = PRF-256(Random number, "Init Counter",
319 * Local MAC Address || Time)
321 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
322 wpa_get_ntp_timestamp(buf + ETH_ALEN);
323 os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
324 if (os_get_random(rkey, sizeof(rkey)) ||
325 os_get_random(group->GMK, WPA_GMK_LEN)) {
326 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
332 sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
333 group->Counter, WPA_NONCE_LEN);
336 wpa_group_sm_step(wpa_auth, group);
337 group->GInit = FALSE;
338 wpa_group_sm_step(wpa_auth, group);
345 * wpa_init - Initialize WPA authenticator
346 * @addr: Authenticator address
347 * @conf: Configuration for WPA authenticator
348 * @cb: Callback functions for WPA authenticator
349 * Returns: Pointer to WPA authenticator data or %NULL on failure
351 struct wpa_authenticator * wpa_init(const u8 *addr,
352 struct wpa_auth_config *conf,
353 struct wpa_auth_callbacks *cb)
355 struct wpa_authenticator *wpa_auth;
357 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
358 if (wpa_auth == NULL)
360 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
361 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
362 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
364 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
365 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
370 wpa_auth->group = wpa_group_init(wpa_auth, 0);
371 if (wpa_auth->group == NULL) {
372 os_free(wpa_auth->wpa_ie);
377 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
379 if (wpa_auth->pmksa == NULL) {
380 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
381 os_free(wpa_auth->wpa_ie);
386 #ifdef CONFIG_IEEE80211R
387 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
388 if (wpa_auth->ft_pmk_cache == NULL) {
389 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
390 os_free(wpa_auth->wpa_ie);
391 pmksa_cache_auth_deinit(wpa_auth->pmksa);
395 #endif /* CONFIG_IEEE80211R */
397 if (wpa_auth->conf.wpa_gmk_rekey) {
398 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
399 wpa_rekey_gmk, wpa_auth, NULL);
402 if (wpa_auth->conf.wpa_group_rekey) {
403 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
404 wpa_rekey_gtk, wpa_auth, NULL);
412 * wpa_deinit - Deinitialize WPA authenticator
413 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
415 void wpa_deinit(struct wpa_authenticator *wpa_auth)
417 struct wpa_group *group, *prev;
419 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
420 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
422 #ifdef CONFIG_PEERKEY
423 while (wpa_auth->stsl_negotiations)
424 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
425 #endif /* CONFIG_PEERKEY */
427 pmksa_cache_auth_deinit(wpa_auth->pmksa);
429 #ifdef CONFIG_IEEE80211R
430 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
431 wpa_auth->ft_pmk_cache = NULL;
432 #endif /* CONFIG_IEEE80211R */
434 os_free(wpa_auth->wpa_ie);
436 group = wpa_auth->group;
448 * wpa_reconfig - Update WPA authenticator configuration
449 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
450 * @conf: Configuration for WPA authenticator
452 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
453 struct wpa_auth_config *conf)
455 if (wpa_auth == NULL)
458 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
459 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
460 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
468 struct wpa_state_machine *
469 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
471 struct wpa_state_machine *sm;
473 sm = os_zalloc(sizeof(struct wpa_state_machine));
476 os_memcpy(sm->addr, addr, ETH_ALEN);
478 sm->wpa_auth = wpa_auth;
479 sm->group = wpa_auth->group;
485 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
486 struct wpa_state_machine *sm)
488 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
491 #ifdef CONFIG_IEEE80211R
492 if (sm->ft_completed) {
493 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
494 "FT authentication already completed - do not "
495 "start 4-way handshake");
498 #endif /* CONFIG_IEEE80211R */
501 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
502 sm->ReAuthenticationRequest = TRUE;
507 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
508 "start authentication");
514 sm->AuthenticationRequest = TRUE;
519 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
521 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
522 * reassociates back to the same AP while the previous entry for the
523 * STA has not yet been removed. */
527 sm->wpa_key_mgmt = 0;
531 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
533 os_free(sm->last_rx_eapol_key);
539 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
544 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
545 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
546 "strict rekeying - force GTK rekey since STA "
548 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
549 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
553 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
554 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
555 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
556 if (sm->in_step_loop) {
557 /* Must not free state machine while wpa_sm_step() is running.
558 * Freeing will be completed in the end of wpa_sm_step(). */
559 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
560 "machine deinit for " MACSTR, MAC2STR(sm->addr));
561 sm->pending_deinit = 1;
567 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
572 sm->PTKRequest = TRUE;
577 static int wpa_replay_counter_valid(struct wpa_state_machine *sm,
578 const u8 *replay_counter)
581 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
582 if (!sm->key_replay[i].valid)
584 if (os_memcmp(replay_counter, sm->key_replay[i].counter,
585 WPA_REPLAY_COUNTER_LEN) == 0)
592 void wpa_receive(struct wpa_authenticator *wpa_auth,
593 struct wpa_state_machine *sm,
594 u8 *data, size_t data_len)
596 struct ieee802_1x_hdr *hdr;
597 struct wpa_eapol_key *key;
598 u16 key_info, key_data_length;
599 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
600 SMK_M1, SMK_M3, SMK_ERROR } msg;
602 struct wpa_eapol_ie_parse kde;
604 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
607 if (data_len < sizeof(*hdr) + sizeof(*key))
610 hdr = (struct ieee802_1x_hdr *) data;
611 key = (struct wpa_eapol_key *) (hdr + 1);
612 key_info = WPA_GET_BE16(key->key_info);
613 key_data_length = WPA_GET_BE16(key->key_data_length);
614 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
615 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
616 "key_data overflow (%d > %lu)",
618 (unsigned long) (data_len - sizeof(*hdr) -
623 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
626 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
627 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
628 if (key_info & WPA_KEY_INFO_ERROR) {
630 msgtxt = "SMK Error";
635 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
638 } else if (key_info & WPA_KEY_INFO_REQUEST) {
641 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
643 msgtxt = "2/2 Group";
644 } else if (key_data_length == 0) {
646 msgtxt = "4/4 Pairwise";
649 msgtxt = "2/4 Pairwise";
652 /* TODO: key_info type validation for PeerKey */
653 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
655 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
656 if (sm->pairwise == WPA_CIPHER_CCMP) {
657 if (wpa_use_aes_cmac(sm) &&
658 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
659 wpa_auth_logger(wpa_auth, sm->addr,
661 "advertised support for "
662 "AES-128-CMAC, but did not "
667 if (!wpa_use_aes_cmac(sm) &&
668 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
669 wpa_auth_logger(wpa_auth, sm->addr,
671 "did not use HMAC-SHA1-AES "
678 if (key_info & WPA_KEY_INFO_REQUEST) {
679 if (sm->req_replay_counter_used &&
680 os_memcmp(key->replay_counter, sm->req_replay_counter,
681 WPA_REPLAY_COUNTER_LEN) <= 0) {
682 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
683 "received EAPOL-Key request with "
689 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
690 !wpa_replay_counter_valid(sm, key->replay_counter)) {
692 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
693 "received EAPOL-Key %s with unexpected "
694 "replay counter", msgtxt);
695 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
696 if (!sm->key_replay[i].valid)
698 wpa_hexdump(MSG_DEBUG, "pending replay counter",
699 sm->key_replay[i].counter,
700 WPA_REPLAY_COUNTER_LEN);
702 wpa_hexdump(MSG_DEBUG, "received replay counter",
703 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
709 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
710 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
711 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
712 "received EAPOL-Key msg 2/4 in "
713 "invalid state (%d) - dropped",
717 if (sm->wpa_ie == NULL ||
718 sm->wpa_ie_len != key_data_length ||
719 os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
720 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
721 "WPA IE from (Re)AssocReq did not "
722 "match with msg 2/4");
724 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
725 sm->wpa_ie, sm->wpa_ie_len);
727 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
728 (u8 *) (key + 1), key_data_length);
729 /* MLME-DEAUTHENTICATE.request */
730 wpa_sta_disconnect(wpa_auth, sm->addr);
735 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
737 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
738 "received EAPOL-Key msg 4/4 in "
739 "invalid state (%d) - dropped",
745 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
747 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
748 "received EAPOL-Key msg 2/2 in "
749 "invalid state (%d) - dropped",
750 sm->wpa_ptk_group_state);
754 #ifdef CONFIG_PEERKEY
758 if (!wpa_auth->conf.peerkey) {
759 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
760 "PeerKey use disabled - ignoring message");
763 if (!sm->PTK_valid) {
764 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
765 "received EAPOL-Key msg SMK in "
766 "invalid state - dropped");
770 #else /* CONFIG_PEERKEY */
774 return; /* STSL disabled - ignore SMK messages */
775 #endif /* CONFIG_PEERKEY */
780 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
781 "received EAPOL-Key frame (%s)", msgtxt);
783 if (key_info & WPA_KEY_INFO_ACK) {
784 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
785 "received invalid EAPOL-Key: Key Ack set");
789 if (!(key_info & WPA_KEY_INFO_MIC)) {
790 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
791 "received invalid EAPOL-Key: Key MIC not set");
795 sm->MICVerified = FALSE;
797 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
798 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
799 "received EAPOL-Key with invalid MIC");
802 sm->MICVerified = TRUE;
803 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
806 if (key_info & WPA_KEY_INFO_REQUEST) {
807 if (sm->MICVerified) {
808 sm->req_replay_counter_used = 1;
809 os_memcpy(sm->req_replay_counter, key->replay_counter,
810 WPA_REPLAY_COUNTER_LEN);
812 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
813 "received EAPOL-Key request with "
819 * TODO: should decrypt key data field if encryption was used;
820 * even though MAC address KDE is not normally encrypted,
821 * supplicant is allowed to encrypt it.
823 if (msg == SMK_ERROR) {
824 #ifdef CONFIG_PEERKEY
825 wpa_smk_error(wpa_auth, sm, key);
826 #endif /* CONFIG_PEERKEY */
828 } else if (key_info & WPA_KEY_INFO_ERROR) {
829 /* Supplicant reported a Michael MIC error */
830 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
831 "received EAPOL-Key Error Request "
832 "(STA detected Michael MIC failure)");
833 wpa_auth_mic_failure_report(wpa_auth, sm->addr);
834 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
835 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
836 /* Error report is not a request for a new key
837 * handshake, but since Authenticator may do it, let's
838 * change the keys now anyway. */
839 wpa_request_new_ptk(sm);
840 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
841 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
842 "received EAPOL-Key Request for new "
844 wpa_request_new_ptk(sm);
845 #ifdef CONFIG_PEERKEY
846 } else if (msg == SMK_M1) {
847 wpa_smk_m1(wpa_auth, sm, key);
848 #endif /* CONFIG_PEERKEY */
849 } else if (key_data_length > 0 &&
850 wpa_parse_kde_ies((const u8 *) (key + 1),
851 key_data_length, &kde) == 0 &&
854 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
855 "received EAPOL-Key Request for GTK "
857 /* FIX: why was this triggering PTK rekeying for the
858 * STA that requested Group Key rekeying?? */
859 /* wpa_request_new_ptk(sta->wpa_sm); */
860 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
861 wpa_rekey_gtk(wpa_auth, NULL);
864 /* Do not allow the same key replay counter to be reused. This
865 * does also invalidate all other pending replay counters if
866 * retransmissions were used, i.e., we will only process one of
867 * the pending replies and ignore rest if more than one is
869 sm->key_replay[0].valid = FALSE;
872 #ifdef CONFIG_PEERKEY
874 wpa_smk_m3(wpa_auth, sm, key);
877 #endif /* CONFIG_PEERKEY */
879 os_free(sm->last_rx_eapol_key);
880 sm->last_rx_eapol_key = os_malloc(data_len);
881 if (sm->last_rx_eapol_key == NULL)
883 os_memcpy(sm->last_rx_eapol_key, data, data_len);
884 sm->last_rx_eapol_key_len = data_len;
886 sm->EAPOLKeyReceived = TRUE;
887 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
888 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
889 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
894 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
895 u8 *gtk, size_t gtk_len)
897 u8 data[ETH_ALEN + WPA_NONCE_LEN];
899 /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
900 os_memcpy(data, addr, ETH_ALEN);
901 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
903 #ifdef CONFIG_IEEE80211W
904 sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
905 data, sizeof(data), gtk, gtk_len);
906 #else /* CONFIG_IEEE80211W */
907 sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
908 data, sizeof(data), gtk, gtk_len);
909 #endif /* CONFIG_IEEE80211W */
911 wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
912 wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
916 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
918 struct wpa_authenticator *wpa_auth = eloop_ctx;
919 struct wpa_state_machine *sm = timeout_ctx;
921 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
922 sm->TimeoutEvt = TRUE;
927 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
928 struct wpa_state_machine *sm, int key_info,
929 const u8 *key_rsc, const u8 *nonce,
930 const u8 *kde, size_t kde_len,
931 int keyidx, int encr, int force_version)
933 struct ieee802_1x_hdr *hdr;
934 struct wpa_eapol_key *key;
937 int key_data_len, pad_len = 0;
939 int version, pairwise;
942 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
945 version = force_version;
946 else if (wpa_use_aes_cmac(sm))
947 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
948 else if (sm->pairwise == WPA_CIPHER_CCMP)
949 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
951 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
953 pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
955 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
956 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
959 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
960 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
961 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
962 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
963 pairwise, (unsigned long) kde_len, keyidx, encr);
965 key_data_len = kde_len;
967 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
968 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
969 pad_len = key_data_len % 8;
971 pad_len = 8 - pad_len;
972 key_data_len += pad_len + 8;
977 hdr = os_zalloc(len);
980 hdr->version = wpa_auth->conf.eapol_version;
981 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
982 hdr->length = host_to_be16(len - sizeof(*hdr));
983 key = (struct wpa_eapol_key *) (hdr + 1);
985 key->type = sm->wpa == WPA_VERSION_WPA2 ?
986 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
988 if (encr && sm->wpa == WPA_VERSION_WPA2)
989 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
990 if (sm->wpa != WPA_VERSION_WPA2)
991 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
992 WPA_PUT_BE16(key->key_info, key_info);
994 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
996 case WPA_CIPHER_CCMP:
997 WPA_PUT_BE16(key->key_length, 16);
999 case WPA_CIPHER_TKIP:
1000 WPA_PUT_BE16(key->key_length, 32);
1002 case WPA_CIPHER_WEP40:
1003 WPA_PUT_BE16(key->key_length, 5);
1005 case WPA_CIPHER_WEP104:
1006 WPA_PUT_BE16(key->key_length, 13);
1009 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1010 WPA_PUT_BE16(key->key_length, 0);
1012 /* FIX: STSL: what to use as key_replay_counter? */
1013 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1014 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1015 os_memcpy(sm->key_replay[i].counter,
1016 sm->key_replay[i - 1].counter,
1017 WPA_REPLAY_COUNTER_LEN);
1019 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1020 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1021 WPA_REPLAY_COUNTER_LEN);
1022 sm->key_replay[0].valid = TRUE;
1025 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1028 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1031 os_memcpy(key + 1, kde, kde_len);
1032 WPA_PUT_BE16(key->key_data_length, kde_len);
1033 } else if (encr && kde) {
1034 buf = os_zalloc(key_data_len);
1040 os_memcpy(pos, kde, kde_len);
1046 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1048 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1049 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1050 if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1051 (u8 *) (key + 1))) {
1056 WPA_PUT_BE16(key->key_data_length, key_data_len);
1059 os_memcpy(key->key_iv,
1060 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1061 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1062 os_memcpy(ek, key->key_iv, 16);
1063 os_memcpy(ek + 16, sm->PTK.kek, 16);
1064 os_memcpy(key + 1, buf, key_data_len);
1065 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1066 WPA_PUT_BE16(key->key_data_length, key_data_len);
1071 if (key_info & WPA_KEY_INFO_MIC) {
1072 if (!sm->PTK_valid) {
1073 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1074 "PTK not valid when sending EAPOL-Key "
1079 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1083 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1085 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1091 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1092 struct wpa_state_machine *sm, int key_info,
1093 const u8 *key_rsc, const u8 *nonce,
1094 const u8 *kde, size_t kde_len,
1095 int keyidx, int encr)
1098 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1104 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1107 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1109 timeout_ms = eapol_key_timeout_first;
1111 timeout_ms = eapol_key_timeout_subseq;
1112 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1113 wpa_send_eapol_timeout, wpa_auth, sm);
1117 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1119 struct ieee802_1x_hdr *hdr;
1120 struct wpa_eapol_key *key;
1125 if (data_len < sizeof(*hdr) + sizeof(*key))
1128 hdr = (struct ieee802_1x_hdr *) data;
1129 key = (struct wpa_eapol_key *) (hdr + 1);
1130 key_info = WPA_GET_BE16(key->key_info);
1131 os_memcpy(mic, key->key_mic, 16);
1132 os_memset(key->key_mic, 0, 16);
1133 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1134 data, data_len, key->key_mic) ||
1135 os_memcmp(mic, key->key_mic, 16) != 0)
1137 os_memcpy(key->key_mic, mic, 16);
1142 void wpa_remove_ptk(struct wpa_state_machine *sm)
1144 sm->PTK_valid = FALSE;
1145 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1146 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, (u8 *) "",
1148 sm->pairwise_set = FALSE;
1149 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1153 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1160 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1161 "event %d notification", event);
1169 sm->DeauthenticationRequest = TRUE;
1172 case WPA_REAUTH_EAPOL:
1173 if (sm->GUpdateStationKeys) {
1175 * Reauthentication cancels the pending group key
1176 * update for this STA.
1178 sm->group->GKeyDoneStations--;
1179 sm->GUpdateStationKeys = FALSE;
1180 sm->PtkGroupInit = TRUE;
1182 sm->ReAuthenticationRequest = TRUE;
1185 #ifdef CONFIG_IEEE80211R
1186 /* Using FT protocol, not WPA auth state machine */
1187 sm->ft_completed = 1;
1189 #else /* CONFIG_IEEE80211R */
1191 #endif /* CONFIG_IEEE80211R */
1194 #ifdef CONFIG_IEEE80211R
1195 sm->ft_completed = 0;
1196 #endif /* CONFIG_IEEE80211R */
1198 #ifdef CONFIG_IEEE80211W
1199 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1201 #endif /* CONFIG_IEEE80211W */
1204 sm->PTK_valid = FALSE;
1205 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1207 if (event != WPA_REAUTH_EAPOL)
1215 static wpa_alg wpa_alg_enum(int alg)
1218 case WPA_CIPHER_CCMP:
1219 return WPA_ALG_CCMP;
1220 case WPA_CIPHER_TKIP:
1221 return WPA_ALG_TKIP;
1222 case WPA_CIPHER_WEP104:
1223 case WPA_CIPHER_WEP40:
1226 return WPA_ALG_NONE;
1231 SM_STATE(WPA_PTK, INITIALIZE)
1233 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1235 /* Init flag is not cleared here, so avoid busy
1236 * loop by claiming nothing changed. */
1237 sm->changed = FALSE;
1241 if (sm->GUpdateStationKeys)
1242 sm->group->GKeyDoneStations--;
1243 sm->GUpdateStationKeys = FALSE;
1244 if (sm->wpa == WPA_VERSION_WPA)
1245 sm->PInitAKeys = FALSE;
1246 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1247 * Local AA > Remote AA)) */) {
1250 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1252 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1254 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1255 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1256 WPA_EAPOL_authorized, 0);
1261 SM_STATE(WPA_PTK, DISCONNECT)
1263 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1264 sm->Disconnect = FALSE;
1265 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1269 SM_STATE(WPA_PTK, DISCONNECTED)
1271 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1272 sm->DeauthenticationRequest = FALSE;
1276 SM_STATE(WPA_PTK, AUTHENTICATION)
1278 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1279 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1280 sm->PTK_valid = FALSE;
1281 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1283 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1284 sm->AuthenticationRequest = FALSE;
1288 SM_STATE(WPA_PTK, AUTHENTICATION2)
1290 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1291 os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1292 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1293 sm->ReAuthenticationRequest = FALSE;
1294 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1295 * logical place than INITIALIZE since AUTHENTICATION2 can be
1296 * re-entered on ReAuthenticationRequest without going through
1302 SM_STATE(WPA_PTK, INITPMK)
1304 u8 msk[2 * PMK_LEN];
1305 size_t len = 2 * PMK_LEN;
1307 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1308 #ifdef CONFIG_IEEE80211R
1310 #endif /* CONFIG_IEEE80211R */
1312 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1313 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1314 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1315 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1316 "(len=%lu)", (unsigned long) len);
1317 os_memcpy(sm->PMK, msk, PMK_LEN);
1318 #ifdef CONFIG_IEEE80211R
1319 if (len >= 2 * PMK_LEN) {
1320 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1321 sm->xxkey_len = PMK_LEN;
1323 #endif /* CONFIG_IEEE80211R */
1325 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1328 sm->req_replay_counter_used = 0;
1329 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1330 * will break reauthentication since EAPOL state machines may not be
1331 * get into AUTHENTICATING state that clears keyRun before WPA state
1332 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1333 * state and takes PMK from the previously used AAA Key. This will
1334 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1335 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1336 * be good workaround for this issue. */
1337 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1341 SM_STATE(WPA_PTK, INITPSK)
1344 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1345 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1347 os_memcpy(sm->PMK, psk, PMK_LEN);
1348 #ifdef CONFIG_IEEE80211R
1349 os_memcpy(sm->xxkey, psk, PMK_LEN);
1350 sm->xxkey_len = PMK_LEN;
1351 #endif /* CONFIG_IEEE80211R */
1353 sm->req_replay_counter_used = 0;
1357 SM_STATE(WPA_PTK, PTKSTART)
1359 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1360 size_t pmkid_len = 0;
1362 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1363 sm->PTKRequest = FALSE;
1364 sm->TimeoutEvt = FALSE;
1367 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1368 /* No point in sending the EAPOL-Key - we will disconnect
1369 * immediately following this. */
1373 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1374 "sending 1/4 msg of 4-Way Handshake");
1376 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1377 * one possible PSK for this STA.
1379 if (sm->wpa == WPA_VERSION_WPA2 &&
1380 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1382 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1383 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1384 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1385 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1387 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1388 sm->pmksa->pmkid, PMKID_LEN);
1391 * Calculate PMKID since no PMKSA cache entry was
1392 * available with pre-calculated PMKID.
1394 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1395 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1396 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1399 wpa_send_eapol(sm->wpa_auth, sm,
1400 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1401 sm->ANonce, pmkid, pmkid_len, 0, 0);
1405 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1406 struct wpa_ptk *ptk)
1408 size_t ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
1409 #ifdef CONFIG_IEEE80211R
1410 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1411 return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
1412 #endif /* CONFIG_IEEE80211R */
1414 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1415 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1416 (u8 *) ptk, ptk_len,
1417 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1423 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1427 const u8 *pmk = NULL;
1429 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1430 sm->EAPOLKeyReceived = FALSE;
1432 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1433 * WPA-PSK: iterate through possible PSKs and select the one matching
1436 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1437 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1443 wpa_derive_ptk(sm, pmk, &PTK);
1445 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1446 sm->last_rx_eapol_key_len) == 0) {
1451 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1456 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1457 "invalid MIC in msg 2/4 of 4-Way Handshake");
1461 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1463 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1464 /* PSK may have changed from the previous choice, so update
1465 * state machine data based on whatever PSK was selected here.
1467 os_memcpy(sm->PMK, pmk, PMK_LEN);
1470 sm->MICVerified = TRUE;
1472 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1473 sm->PTK_valid = TRUE;
1477 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1479 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1484 #ifdef CONFIG_IEEE80211W
1486 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1488 if (sm->mgmt_frame_prot) {
1489 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1496 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1498 struct wpa_igtk_kde igtk;
1499 struct wpa_group *gsm = sm->group;
1501 if (!sm->mgmt_frame_prot)
1504 igtk.keyid[0] = gsm->GN_igtk;
1506 if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1508 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1509 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1510 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1511 (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1516 #else /* CONFIG_IEEE80211W */
1518 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1524 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1529 #endif /* CONFIG_IEEE80211W */
1532 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1534 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1535 size_t gtk_len, kde_len;
1536 struct wpa_group *gsm = sm->group;
1538 int wpa_ie_len, secure, keyidx, encr = 0;
1540 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1541 sm->TimeoutEvt = FALSE;
1544 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1545 /* No point in sending the EAPOL-Key - we will disconnect
1546 * immediately following this. */
1550 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1552 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1553 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1554 wpa_ie = sm->wpa_auth->wpa_ie;
1555 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1556 if (sm->wpa == WPA_VERSION_WPA &&
1557 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1558 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1559 /* WPA-only STA, remove RSN IE */
1560 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1561 wpa_ie_len = wpa_ie[1] + 2;
1563 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1564 "sending 3/4 msg of 4-Way Handshake");
1565 if (sm->wpa == WPA_VERSION_WPA2) {
1566 /* WPA2 send GTK in the 4-way handshake */
1568 gtk = gsm->GTK[gsm->GN - 1];
1569 gtk_len = gsm->GTK_len;
1574 /* WPA does not include GTK in msg 3/4 */
1582 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1584 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1585 kde = os_malloc(kde_len);
1590 os_memcpy(pos, wpa_ie, wpa_ie_len);
1594 hdr[0] = keyidx & 0x03;
1596 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1599 pos = ieee80211w_kde_add(sm, pos);
1601 wpa_send_eapol(sm->wpa_auth, sm,
1602 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1603 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1604 WPA_KEY_INFO_KEY_TYPE,
1605 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1610 SM_STATE(WPA_PTK, PTKINITDONE)
1612 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1613 sm->EAPOLKeyReceived = FALSE;
1617 if (sm->pairwise == WPA_CIPHER_TKIP) {
1624 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1625 sm->PTK.tk1, klen)) {
1626 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1629 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1630 sm->pairwise_set = TRUE;
1632 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1633 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1634 eloop_register_timeout(sm->wpa_auth->conf.
1635 wpa_ptk_rekey, 0, wpa_rekey_ptk,
1639 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1640 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1641 WPA_EAPOL_authorized, 1);
1645 if (0 /* IBSS == TRUE */) {
1647 if (sm->keycount == 2) {
1648 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1649 WPA_EAPOL_portValid, 1);
1652 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1655 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1656 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1657 if (sm->wpa == WPA_VERSION_WPA)
1658 sm->PInitAKeys = TRUE;
1661 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1662 "pairwise key handshake completed (%s)",
1663 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1665 #ifdef CONFIG_IEEE80211R
1666 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1667 #endif /* CONFIG_IEEE80211R */
1673 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1676 SM_ENTER(WPA_PTK, INITIALIZE);
1677 else if (sm->Disconnect
1678 /* || FIX: dot11RSNAConfigSALifetime timeout */)
1679 SM_ENTER(WPA_PTK, DISCONNECT);
1680 else if (sm->DeauthenticationRequest)
1681 SM_ENTER(WPA_PTK, DISCONNECTED);
1682 else if (sm->AuthenticationRequest)
1683 SM_ENTER(WPA_PTK, AUTHENTICATION);
1684 else if (sm->ReAuthenticationRequest)
1685 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1686 else if (sm->PTKRequest)
1687 SM_ENTER(WPA_PTK, PTKSTART);
1688 else switch (sm->wpa_ptk_state) {
1689 case WPA_PTK_INITIALIZE:
1691 case WPA_PTK_DISCONNECT:
1692 SM_ENTER(WPA_PTK, DISCONNECTED);
1694 case WPA_PTK_DISCONNECTED:
1695 SM_ENTER(WPA_PTK, INITIALIZE);
1697 case WPA_PTK_AUTHENTICATION:
1698 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1700 case WPA_PTK_AUTHENTICATION2:
1701 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1702 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1703 WPA_EAPOL_keyRun) > 0)
1704 SM_ENTER(WPA_PTK, INITPMK);
1705 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1706 /* FIX: && 802.1X::keyRun */)
1707 SM_ENTER(WPA_PTK, INITPSK);
1709 case WPA_PTK_INITPMK:
1710 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1711 WPA_EAPOL_keyAvailable) > 0)
1712 SM_ENTER(WPA_PTK, PTKSTART);
1714 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1715 SM_ENTER(WPA_PTK, DISCONNECT);
1718 case WPA_PTK_INITPSK:
1719 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1720 SM_ENTER(WPA_PTK, PTKSTART);
1722 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1723 "no PSK configured for the STA");
1724 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1725 SM_ENTER(WPA_PTK, DISCONNECT);
1728 case WPA_PTK_PTKSTART:
1729 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1730 sm->EAPOLKeyPairwise)
1731 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1732 else if (sm->TimeoutCtr >
1733 (int) dot11RSNAConfigPairwiseUpdateCount) {
1734 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1735 SM_ENTER(WPA_PTK, DISCONNECT);
1736 } else if (sm->TimeoutEvt)
1737 SM_ENTER(WPA_PTK, PTKSTART);
1739 case WPA_PTK_PTKCALCNEGOTIATING:
1740 if (sm->MICVerified)
1741 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1742 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1743 sm->EAPOLKeyPairwise)
1744 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1745 else if (sm->TimeoutEvt)
1746 SM_ENTER(WPA_PTK, PTKSTART);
1748 case WPA_PTK_PTKCALCNEGOTIATING2:
1749 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1751 case WPA_PTK_PTKINITNEGOTIATING:
1752 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1753 sm->EAPOLKeyPairwise && sm->MICVerified)
1754 SM_ENTER(WPA_PTK, PTKINITDONE);
1755 else if (sm->TimeoutCtr >
1756 (int) dot11RSNAConfigPairwiseUpdateCount) {
1757 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1758 SM_ENTER(WPA_PTK, DISCONNECT);
1759 } else if (sm->TimeoutEvt)
1760 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1762 case WPA_PTK_PTKINITDONE:
1768 SM_STATE(WPA_PTK_GROUP, IDLE)
1770 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1772 /* Init flag is not cleared here, so avoid busy
1773 * loop by claiming nothing changed. */
1774 sm->changed = FALSE;
1776 sm->GTimeoutCtr = 0;
1780 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1782 u8 rsc[WPA_KEY_RSC_LEN];
1783 struct wpa_group *gsm = sm->group;
1784 u8 *kde, *pos, hdr[2];
1787 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1790 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
1791 /* No point in sending the EAPOL-Key - we will disconnect
1792 * immediately following this. */
1796 if (sm->wpa == WPA_VERSION_WPA)
1797 sm->PInitAKeys = FALSE;
1798 sm->TimeoutEvt = FALSE;
1799 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1800 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1801 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1802 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1803 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1804 "sending 1/2 msg of Group Key Handshake");
1806 if (sm->wpa == WPA_VERSION_WPA2) {
1807 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1808 ieee80211w_kde_len(sm);
1809 kde = os_malloc(kde_len);
1814 hdr[0] = gsm->GN & 0x03;
1816 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1817 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1818 pos = ieee80211w_kde_add(sm, pos);
1820 kde = gsm->GTK[gsm->GN - 1];
1821 pos = kde + gsm->GTK_len;
1824 wpa_send_eapol(sm->wpa_auth, sm,
1825 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1827 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1828 rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1829 if (sm->wpa == WPA_VERSION_WPA2)
1834 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1836 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1837 sm->EAPOLKeyReceived = FALSE;
1838 if (sm->GUpdateStationKeys)
1839 sm->group->GKeyDoneStations--;
1840 sm->GUpdateStationKeys = FALSE;
1841 sm->GTimeoutCtr = 0;
1842 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1843 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1844 "group key handshake completed (%s)",
1845 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1850 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1852 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1853 if (sm->GUpdateStationKeys)
1854 sm->group->GKeyDoneStations--;
1855 sm->GUpdateStationKeys = FALSE;
1856 sm->Disconnect = TRUE;
1860 SM_STEP(WPA_PTK_GROUP)
1862 if (sm->Init || sm->PtkGroupInit) {
1863 SM_ENTER(WPA_PTK_GROUP, IDLE);
1864 sm->PtkGroupInit = FALSE;
1865 } else switch (sm->wpa_ptk_group_state) {
1866 case WPA_PTK_GROUP_IDLE:
1867 if (sm->GUpdateStationKeys ||
1868 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1869 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1871 case WPA_PTK_GROUP_REKEYNEGOTIATING:
1872 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1873 !sm->EAPOLKeyPairwise && sm->MICVerified)
1874 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1875 else if (sm->GTimeoutCtr >
1876 (int) dot11RSNAConfigGroupUpdateCount)
1877 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1878 else if (sm->TimeoutEvt)
1879 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1881 case WPA_PTK_GROUP_KEYERROR:
1882 SM_ENTER(WPA_PTK_GROUP, IDLE);
1884 case WPA_PTK_GROUP_REKEYESTABLISHED:
1885 SM_ENTER(WPA_PTK_GROUP, IDLE);
1891 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1892 struct wpa_group *group)
1896 /* FIX: is this the correct way of getting GNonce? */
1897 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1898 inc_byte_array(group->Counter, WPA_NONCE_LEN);
1899 wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1900 group->GTK[group->GN - 1], group->GTK_len);
1902 #ifdef CONFIG_IEEE80211W
1903 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1904 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1905 WPA_IGTK_LEN) < 0) {
1906 wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1910 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1911 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1913 #endif /* CONFIG_IEEE80211W */
1919 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1920 struct wpa_group *group)
1922 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1923 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1924 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1925 group->wpa_group_state = WPA_GROUP_GTK_INIT;
1928 os_memset(group->GTK, 0, sizeof(group->GTK));
1931 #ifdef CONFIG_IEEE80211W
1934 #endif /* CONFIG_IEEE80211W */
1935 /* GTK[GN] = CalcGTK() */
1936 wpa_gtk_update(wpa_auth, group);
1940 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1942 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1943 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1944 "Not in PTKINITDONE; skip Group Key update");
1947 if (sm->GUpdateStationKeys) {
1949 * This should not really happen, but just in case, make sure
1950 * we do not count the same STA twice in GKeyDoneStations.
1952 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1953 "GUpdateStationKeys already set - do not "
1954 "increment GKeyDoneStations");
1956 sm->group->GKeyDoneStations++;
1957 sm->GUpdateStationKeys = TRUE;
1964 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1965 struct wpa_group *group)
1969 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1970 "SETKEYS (VLAN-ID %d)", group->vlan_id);
1971 group->changed = TRUE;
1972 group->wpa_group_state = WPA_GROUP_SETKEYS;
1973 group->GTKReKey = FALSE;
1975 group->GM = group->GN;
1977 #ifdef CONFIG_IEEE80211W
1978 tmp = group->GM_igtk;
1979 group->GM_igtk = group->GN_igtk;
1980 group->GN_igtk = tmp;
1981 #endif /* CONFIG_IEEE80211W */
1982 /* "GKeyDoneStations = GNoStations" is done in more robust way by
1983 * counting the STAs that are marked with GUpdateStationKeys instead of
1984 * including all STAs that could be in not-yet-completed state. */
1985 wpa_gtk_update(wpa_auth, group);
1987 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1988 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1989 group->GKeyDoneStations);
1993 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1994 struct wpa_group *group)
1996 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1997 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1998 group->changed = TRUE;
1999 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2000 wpa_auth_set_key(wpa_auth, group->vlan_id,
2001 wpa_alg_enum(wpa_auth->conf.wpa_group),
2002 NULL, group->GN, group->GTK[group->GN - 1],
2005 #ifdef CONFIG_IEEE80211W
2006 if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
2007 wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK,
2008 NULL, group->GN_igtk,
2009 group->IGTK[group->GN_igtk - 4],
2012 #endif /* CONFIG_IEEE80211W */
2016 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2017 struct wpa_group *group)
2020 wpa_group_gtk_init(wpa_auth, group);
2021 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2022 group->GTKAuthenticator) {
2023 wpa_group_setkeysdone(wpa_auth, group);
2024 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2026 wpa_group_setkeys(wpa_auth, group);
2027 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2028 if (group->GKeyDoneStations == 0)
2029 wpa_group_setkeysdone(wpa_auth, group);
2030 else if (group->GTKReKey)
2031 wpa_group_setkeys(wpa_auth, group);
2036 static void wpa_sm_step(struct wpa_state_machine *sm)
2041 if (sm->in_step_loop) {
2042 /* This should not happen, but if it does, make sure we do not
2043 * end up freeing the state machine too early by exiting the
2044 * recursive call. */
2045 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2049 sm->in_step_loop = 1;
2051 if (sm->pending_deinit)
2054 sm->changed = FALSE;
2055 sm->wpa_auth->group->changed = FALSE;
2057 SM_STEP_RUN(WPA_PTK);
2058 if (sm->pending_deinit)
2060 SM_STEP_RUN(WPA_PTK_GROUP);
2061 if (sm->pending_deinit)
2063 wpa_group_sm_step(sm->wpa_auth, sm->group);
2064 } while (sm->changed || sm->wpa_auth->group->changed);
2065 sm->in_step_loop = 0;
2067 if (sm->pending_deinit) {
2068 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2069 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2070 wpa_free_sta_sm(sm);
2075 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2077 struct wpa_state_machine *sm = eloop_ctx;
2082 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2086 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2090 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2093 struct wpa_group *group;
2095 if (wpa_auth == NULL)
2098 group = wpa_auth->group;
2100 for (i = 0; i < 2; i++) {
2102 group->GM = group->GN;
2104 #ifdef CONFIG_IEEE80211W
2105 tmp = group->GM_igtk;
2106 group->GM_igtk = group->GN_igtk;
2107 group->GN_igtk = tmp;
2108 #endif /* CONFIG_IEEE80211W */
2109 wpa_gtk_update(wpa_auth, group);
2114 static const char * wpa_bool_txt(int bool)
2116 return bool ? "TRUE" : "FALSE";
2120 static int wpa_cipher_bits(int cipher)
2123 case WPA_CIPHER_CCMP:
2125 case WPA_CIPHER_TKIP:
2127 case WPA_CIPHER_WEP104:
2129 case WPA_CIPHER_WEP40:
2137 #define RSN_SUITE "%02x-%02x-%02x-%d"
2138 #define RSN_SUITE_ARG(s) \
2139 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2141 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2144 char pmkid_txt[PMKID_LEN * 2 + 1];
2146 if (wpa_auth == NULL)
2149 ret = os_snprintf(buf + len, buflen - len,
2150 "dot11RSNAOptionImplemented=TRUE\n"
2151 #ifdef CONFIG_RSN_PREAUTH
2152 "dot11RSNAPreauthenticationImplemented=TRUE\n"
2153 #else /* CONFIG_RSN_PREAUTH */
2154 "dot11RSNAPreauthenticationImplemented=FALSE\n"
2155 #endif /* CONFIG_RSN_PREAUTH */
2156 "dot11RSNAEnabled=%s\n"
2157 "dot11RSNAPreauthenticationEnabled=%s\n",
2158 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2159 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2160 if (ret < 0 || (size_t) ret >= buflen - len)
2164 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2165 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2168 buf + len, buflen - len,
2169 "dot11RSNAConfigVersion=%u\n"
2170 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2171 /* FIX: dot11RSNAConfigGroupCipher */
2172 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2173 /* FIX: dot11RSNAConfigGroupRekeyTime */
2174 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2175 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2176 "dot11RSNAConfigGroupUpdateCount=%u\n"
2177 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2178 "dot11RSNAConfigGroupCipherSize=%u\n"
2179 "dot11RSNAConfigPMKLifetime=%u\n"
2180 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2181 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2182 "dot11RSNAConfigSATimeout=%u\n"
2183 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2184 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2185 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2186 "dot11RSNAPMKIDUsed=%s\n"
2187 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2188 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2189 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2190 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2191 "dot11RSNA4WayHandshakeFailures=%u\n"
2192 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2194 !!wpa_auth->conf.wpa_strict_rekey,
2195 dot11RSNAConfigGroupUpdateCount,
2196 dot11RSNAConfigPairwiseUpdateCount,
2197 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2198 dot11RSNAConfigPMKLifetime,
2199 dot11RSNAConfigPMKReauthThreshold,
2200 dot11RSNAConfigSATimeout,
2201 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2202 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2203 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2205 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2206 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2207 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2208 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2209 wpa_auth->dot11RSNA4WayHandshakeFailures);
2210 if (ret < 0 || (size_t) ret >= buflen - len)
2214 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2215 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2218 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2219 wpa_auth->group->wpa_group_state);
2220 if (ret < 0 || (size_t) ret >= buflen - len)
2228 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2236 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2238 /* dot11RSNAStatsEntry */
2240 if (sm->wpa == WPA_VERSION_WPA) {
2241 if (sm->pairwise == WPA_CIPHER_CCMP)
2242 pairwise = WPA_CIPHER_SUITE_CCMP;
2243 else if (sm->pairwise == WPA_CIPHER_TKIP)
2244 pairwise = WPA_CIPHER_SUITE_TKIP;
2245 else if (sm->pairwise == WPA_CIPHER_WEP104)
2246 pairwise = WPA_CIPHER_SUITE_WEP104;
2247 else if (sm->pairwise == WPA_CIPHER_WEP40)
2248 pairwise = WPA_CIPHER_SUITE_WEP40;
2249 else if (sm->pairwise == WPA_CIPHER_NONE)
2250 pairwise = WPA_CIPHER_SUITE_NONE;
2251 } else if (sm->wpa == WPA_VERSION_WPA2) {
2252 if (sm->pairwise == WPA_CIPHER_CCMP)
2253 pairwise = RSN_CIPHER_SUITE_CCMP;
2254 else if (sm->pairwise == WPA_CIPHER_TKIP)
2255 pairwise = RSN_CIPHER_SUITE_TKIP;
2256 else if (sm->pairwise == WPA_CIPHER_WEP104)
2257 pairwise = RSN_CIPHER_SUITE_WEP104;
2258 else if (sm->pairwise == WPA_CIPHER_WEP40)
2259 pairwise = RSN_CIPHER_SUITE_WEP40;
2260 else if (sm->pairwise == WPA_CIPHER_NONE)
2261 pairwise = RSN_CIPHER_SUITE_NONE;
2266 buf + len, buflen - len,
2267 /* TODO: dot11RSNAStatsIndex */
2268 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2269 "dot11RSNAStatsVersion=1\n"
2270 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2271 /* TODO: dot11RSNAStatsTKIPICVErrors */
2272 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2273 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2274 /* TODO: dot11RSNAStatsCCMPReplays */
2275 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2276 /* TODO: dot11RSNAStatsTKIPReplays */,
2278 RSN_SUITE_ARG(pairwise),
2279 sm->dot11RSNAStatsTKIPLocalMICFailures,
2280 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2281 if (ret < 0 || (size_t) ret >= buflen - len)
2286 ret = os_snprintf(buf + len, buflen - len,
2287 "hostapdWPAPTKState=%d\n"
2288 "hostapdWPAPTKGroupState=%d\n",
2290 sm->wpa_ptk_group_state);
2291 if (ret < 0 || (size_t) ret >= buflen - len)
2299 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2302 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2306 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2308 return sm && sm->pairwise_set;
2312 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2314 return sm->pairwise;
2318 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2322 return sm->wpa_key_mgmt;
2326 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2334 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2335 struct rsn_pmksa_cache_entry *entry)
2337 if (sm == NULL || sm->pmksa != entry)
2344 struct rsn_pmksa_cache_entry *
2345 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2347 return sm ? sm->pmksa : NULL;
2351 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2354 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2358 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2360 if (wpa_auth == NULL)
2362 *len = wpa_auth->wpa_ie_len;
2363 return wpa_auth->wpa_ie;
2367 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2368 int session_timeout, struct eapol_state_machine *eapol)
2370 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2373 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2374 sm->wpa_auth->addr, sm->addr, session_timeout,
2375 eapol, sm->wpa_key_mgmt))
2382 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2383 const u8 *pmk, size_t len, const u8 *sta_addr,
2384 int session_timeout,
2385 struct eapol_state_machine *eapol)
2387 if (wpa_auth == NULL)
2390 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2391 sta_addr, session_timeout, eapol,
2392 WPA_KEY_MGMT_IEEE8021X))
2399 static struct wpa_group *
2400 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2402 struct wpa_group *group;
2404 if (wpa_auth == NULL || wpa_auth->group == NULL)
2407 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2409 group = wpa_group_init(wpa_auth, vlan_id);
2413 group->next = wpa_auth->group->next;
2414 wpa_auth->group->next = group;
2420 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2422 struct wpa_group *group;
2424 if (sm == NULL || sm->wpa_auth == NULL)
2427 group = sm->wpa_auth->group;
2429 if (group->vlan_id == vlan_id)
2431 group = group->next;
2434 if (group == NULL) {
2435 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2440 if (sm->group == group)
2443 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2444 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2450 #endif /* CONFIG_NATIVE_WINDOWS */