2 * IEEE 802.11 RSN / WPA Authenticator
3 * Copyright (c) 2004-2019, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "utils/state_machine.h"
14 #include "utils/bitfield.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/ocv.h"
17 #include "crypto/aes.h"
18 #include "crypto/aes_wrap.h"
19 #include "crypto/aes_siv.h"
20 #include "crypto/crypto.h"
21 #include "crypto/sha1.h"
22 #include "crypto/sha256.h"
23 #include "crypto/sha384.h"
24 #include "crypto/random.h"
25 #include "eapol_auth/eapol_auth_sm.h"
26 #include "drivers/driver.h"
27 #include "ap_config.h"
28 #include "ieee802_11.h"
30 #include "pmksa_cache_auth.h"
31 #include "wpa_auth_i.h"
32 #include "wpa_auth_ie.h"
34 #define STATE_MACHINE_DATA struct wpa_state_machine
35 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
36 #define STATE_MACHINE_ADDR sm->addr
39 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
40 static int wpa_sm_step(struct wpa_state_machine *sm);
41 static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
42 u8 *data, size_t data_len);
44 static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
45 u8 *buf, size_t buf_len, u16 *_key_data_len);
46 static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
47 const struct wpabuf *hlp);
48 #endif /* CONFIG_FILS */
49 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
50 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
51 struct wpa_group *group);
52 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
53 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
54 struct wpa_group *group);
55 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
56 struct wpa_group *group);
57 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
58 const u8 *pmk, unsigned int pmk_len,
60 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
61 struct wpa_group *group);
62 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
63 struct wpa_group *group);
64 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
65 struct wpa_group *group);
66 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
68 static const u32 eapol_key_timeout_first = 100; /* ms */
69 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
70 static const u32 eapol_key_timeout_first_group = 500; /* ms */
71 static const u32 eapol_key_timeout_no_retrans = 4000; /* ms */
73 /* TODO: make these configurable */
74 static const int dot11RSNAConfigPMKLifetime = 43200;
75 static const int dot11RSNAConfigPMKReauthThreshold = 70;
76 static const int dot11RSNAConfigSATimeout = 60;
79 static inline int wpa_auth_mic_failure_report(
80 struct wpa_authenticator *wpa_auth, const u8 *addr)
82 if (wpa_auth->cb->mic_failure_report)
83 return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
88 static inline void wpa_auth_psk_failure_report(
89 struct wpa_authenticator *wpa_auth, const u8 *addr)
91 if (wpa_auth->cb->psk_failure_report)
92 wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
96 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
97 const u8 *addr, wpa_eapol_variable var,
100 if (wpa_auth->cb->set_eapol)
101 wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
105 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
106 const u8 *addr, wpa_eapol_variable var)
108 if (wpa_auth->cb->get_eapol == NULL)
110 return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
114 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
116 const u8 *p2p_dev_addr,
117 const u8 *prev_psk, size_t *psk_len,
120 if (wpa_auth->cb->get_psk == NULL)
122 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
123 prev_psk, psk_len, vlan_id);
127 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
128 const u8 *addr, u8 *msk, size_t *len)
130 if (wpa_auth->cb->get_msk == NULL)
132 return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
136 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
138 enum wpa_alg alg, const u8 *addr, int idx,
139 u8 *key, size_t key_len)
141 if (wpa_auth->cb->set_key == NULL)
143 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
148 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
149 const u8 *addr, int idx, u8 *seq)
151 if (wpa_auth->cb->get_seqnum == NULL)
153 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
158 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
159 const u8 *data, size_t data_len, int encrypt)
161 if (wpa_auth->cb->send_eapol == NULL)
163 return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
169 static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
172 if (wpa_auth->cb->start_ampe == NULL)
174 return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
176 #endif /* CONFIG_MESH */
179 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
180 int (*cb)(struct wpa_state_machine *sm, void *ctx),
183 if (wpa_auth->cb->for_each_sta == NULL)
185 return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
189 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
190 int (*cb)(struct wpa_authenticator *a, void *ctx),
193 if (wpa_auth->cb->for_each_auth == NULL)
195 return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
199 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
200 logger_level level, const char *txt)
202 if (wpa_auth->cb->logger == NULL)
204 wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
208 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
209 logger_level level, const char *fmt, ...)
215 if (wpa_auth->cb->logger == NULL)
218 maxlen = os_strlen(fmt) + 100;
219 format = os_malloc(maxlen);
224 vsnprintf(format, maxlen, fmt, ap);
227 wpa_auth_logger(wpa_auth, addr, level, format);
233 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
234 const u8 *addr, u16 reason)
236 if (wpa_auth->cb->disconnect == NULL)
238 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)",
239 MAC2STR(addr), reason);
240 wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason);
245 static int wpa_channel_info(struct wpa_authenticator *wpa_auth,
246 struct wpa_channel_info *ci)
248 if (!wpa_auth->cb->channel_info)
250 return wpa_auth->cb->channel_info(wpa_auth->cb_ctx, ci);
252 #endif /* CONFIG_OCV */
255 static int wpa_auth_update_vlan(struct wpa_authenticator *wpa_auth,
256 const u8 *addr, int vlan_id)
258 if (!wpa_auth->cb->update_vlan)
260 return wpa_auth->cb->update_vlan(wpa_auth->cb_ctx, addr, vlan_id);
264 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
266 struct wpa_authenticator *wpa_auth = eloop_ctx;
268 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
269 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
272 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
273 wpa_hexdump_key(MSG_DEBUG, "GMK",
274 wpa_auth->group->GMK, WPA_GMK_LEN);
277 if (wpa_auth->conf.wpa_gmk_rekey) {
278 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
279 wpa_rekey_gmk, wpa_auth, NULL);
284 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
286 struct wpa_authenticator *wpa_auth = eloop_ctx;
287 struct wpa_group *group, *next;
289 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
290 group = wpa_auth->group;
292 wpa_group_get(wpa_auth, group);
294 group->GTKReKey = TRUE;
296 group->changed = FALSE;
297 wpa_group_sm_step(wpa_auth, group);
298 } while (group->changed);
301 wpa_group_put(wpa_auth, group);
305 if (wpa_auth->conf.wpa_group_rekey) {
306 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
307 0, wpa_rekey_gtk, wpa_auth, NULL);
312 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
314 struct wpa_authenticator *wpa_auth = eloop_ctx;
315 struct wpa_state_machine *sm = timeout_ctx;
317 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
318 wpa_request_new_ptk(sm);
323 void wpa_auth_set_ptk_rekey_timer(struct wpa_state_machine *sm)
325 if (sm && sm->wpa_auth->conf.wpa_ptk_rekey) {
326 wpa_printf(MSG_DEBUG, "WPA: Start PTK rekeying timer for "
327 MACSTR " (%d seconds)", MAC2STR(sm->addr),
328 sm->wpa_auth->conf.wpa_ptk_rekey);
329 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
330 eloop_register_timeout(sm->wpa_auth->conf.wpa_ptk_rekey, 0,
331 wpa_rekey_ptk, sm->wpa_auth, sm);
336 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
338 if (sm->pmksa == ctx)
344 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
347 struct wpa_authenticator *wpa_auth = ctx;
348 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
352 static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
353 struct wpa_group *group)
355 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
359 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
361 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
364 * Counter = PRF-256(Random number, "Init Counter",
365 * Local MAC Address || Time)
367 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
368 wpa_get_ntp_timestamp(buf + ETH_ALEN);
369 ptr = (unsigned long) group;
370 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
372 os_memset(buf + ETH_ALEN, 0xab, 8);
373 os_memset(buf + ETH_ALEN + 8, 0xcd, sizeof(ptr));
374 #endif /* TEST_FUZZ */
375 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
378 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
379 group->Counter, WPA_NONCE_LEN) < 0)
381 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
382 group->Counter, WPA_NONCE_LEN);
388 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
389 int vlan_id, int delay_init)
391 struct wpa_group *group;
393 group = os_zalloc(sizeof(struct wpa_group));
397 group->GTKAuthenticator = TRUE;
398 group->vlan_id = vlan_id;
399 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
401 if (random_pool_ready() != 1) {
402 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
403 "for secure operations - update keys later when "
404 "the first station connects");
408 * Set initial GMK/Counter value here. The actual values that will be
409 * used in negotiations will be set once the first station tries to
410 * connect. This allows more time for collecting additional randomness
411 * on embedded devices.
413 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
414 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
422 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
423 "until Beacon frames have been configured");
424 /* Initialization is completed in wpa_init_keys(). */
426 wpa_group_sm_step(wpa_auth, group);
427 group->GInit = FALSE;
428 wpa_group_sm_step(wpa_auth, group);
436 * wpa_init - Initialize WPA authenticator
437 * @addr: Authenticator address
438 * @conf: Configuration for WPA authenticator
439 * @cb: Callback functions for WPA authenticator
440 * Returns: Pointer to WPA authenticator data or %NULL on failure
442 struct wpa_authenticator * wpa_init(const u8 *addr,
443 struct wpa_auth_config *conf,
444 const struct wpa_auth_callbacks *cb,
447 struct wpa_authenticator *wpa_auth;
449 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
450 if (wpa_auth == NULL)
452 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
453 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
455 wpa_auth->cb_ctx = cb_ctx;
457 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
458 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
463 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
464 if (wpa_auth->group == NULL) {
465 os_free(wpa_auth->wpa_ie);
470 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
472 if (wpa_auth->pmksa == NULL) {
473 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
474 os_free(wpa_auth->group);
475 os_free(wpa_auth->wpa_ie);
480 #ifdef CONFIG_IEEE80211R_AP
481 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
482 if (wpa_auth->ft_pmk_cache == NULL) {
483 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
484 os_free(wpa_auth->group);
485 os_free(wpa_auth->wpa_ie);
486 pmksa_cache_auth_deinit(wpa_auth->pmksa);
490 #endif /* CONFIG_IEEE80211R_AP */
492 if (wpa_auth->conf.wpa_gmk_rekey) {
493 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
494 wpa_rekey_gmk, wpa_auth, NULL);
497 if (wpa_auth->conf.wpa_group_rekey) {
498 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
499 wpa_rekey_gtk, wpa_auth, NULL);
503 if (WPA_GET_BE32(conf->ip_addr_start)) {
504 int count = WPA_GET_BE32(conf->ip_addr_end) -
505 WPA_GET_BE32(conf->ip_addr_start) + 1;
509 wpa_auth->ip_pool = bitfield_alloc(count);
511 #endif /* CONFIG_P2P */
517 int wpa_init_keys(struct wpa_authenticator *wpa_auth)
519 struct wpa_group *group = wpa_auth->group;
521 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
523 wpa_group_sm_step(wpa_auth, group);
524 group->GInit = FALSE;
525 wpa_group_sm_step(wpa_auth, group);
526 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
533 * wpa_deinit - Deinitialize WPA authenticator
534 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
536 void wpa_deinit(struct wpa_authenticator *wpa_auth)
538 struct wpa_group *group, *prev;
540 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
541 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
543 pmksa_cache_auth_deinit(wpa_auth->pmksa);
545 #ifdef CONFIG_IEEE80211R_AP
546 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
547 wpa_auth->ft_pmk_cache = NULL;
548 wpa_ft_deinit(wpa_auth);
549 #endif /* CONFIG_IEEE80211R_AP */
552 bitfield_free(wpa_auth->ip_pool);
553 #endif /* CONFIG_P2P */
556 os_free(wpa_auth->wpa_ie);
558 group = wpa_auth->group;
570 * wpa_reconfig - Update WPA authenticator configuration
571 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
572 * @conf: Configuration for WPA authenticator
574 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
575 struct wpa_auth_config *conf)
577 struct wpa_group *group;
578 if (wpa_auth == NULL)
581 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
582 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
583 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
588 * Reinitialize GTK to make sure it is suitable for the new
591 group = wpa_auth->group;
592 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
594 wpa_group_sm_step(wpa_auth, group);
595 group->GInit = FALSE;
596 wpa_group_sm_step(wpa_auth, group);
602 struct wpa_state_machine *
603 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
604 const u8 *p2p_dev_addr)
606 struct wpa_state_machine *sm;
608 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
611 sm = os_zalloc(sizeof(struct wpa_state_machine));
614 os_memcpy(sm->addr, addr, ETH_ALEN);
616 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
618 sm->wpa_auth = wpa_auth;
619 sm->group = wpa_auth->group;
620 wpa_group_get(sm->wpa_auth, sm->group);
626 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
627 struct wpa_state_machine *sm)
629 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
632 #ifdef CONFIG_IEEE80211R_AP
633 if (sm->ft_completed) {
634 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
635 "FT authentication already completed - do not "
636 "start 4-way handshake");
637 /* Go to PTKINITDONE state to allow GTK rekeying */
638 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
642 #endif /* CONFIG_IEEE80211R_AP */
645 if (sm->fils_completed) {
646 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
647 "FILS authentication already completed - do not start 4-way handshake");
648 /* Go to PTKINITDONE state to allow GTK rekeying */
649 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
653 #endif /* CONFIG_FILS */
656 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
657 sm->ReAuthenticationRequest = TRUE;
658 return wpa_sm_step(sm);
661 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
662 "start authentication");
666 if (wpa_sm_step(sm) == 1)
667 return 1; /* should not really happen */
669 sm->AuthenticationRequest = TRUE;
670 return wpa_sm_step(sm);
674 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
676 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
677 * reassociates back to the same AP while the previous entry for the
678 * STA has not yet been removed. */
682 sm->wpa_key_mgmt = 0;
686 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
689 if (WPA_GET_BE32(sm->ip_addr)) {
691 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
692 "address %u.%u.%u.%u from " MACSTR,
693 sm->ip_addr[0], sm->ip_addr[1],
694 sm->ip_addr[2], sm->ip_addr[3],
696 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
697 bitfield_clear(sm->wpa_auth->ip_pool,
698 WPA_GET_BE32(sm->ip_addr) - start);
700 #endif /* CONFIG_P2P */
701 if (sm->GUpdateStationKeys) {
702 sm->group->GKeyDoneStations--;
703 sm->GUpdateStationKeys = FALSE;
705 #ifdef CONFIG_IEEE80211R_AP
706 os_free(sm->assoc_resp_ftie);
707 wpabuf_free(sm->ft_pending_req_ies);
708 #endif /* CONFIG_IEEE80211R_AP */
709 os_free(sm->last_rx_eapol_key);
711 wpa_group_put(sm->wpa_auth, sm->group);
713 wpabuf_clear_free(sm->dpp_z);
714 #endif /* CONFIG_DPP2 */
715 bin_clear_free(sm, sizeof(*sm));
719 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
724 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
725 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
726 "strict rekeying - force GTK rekey since STA "
728 if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk,
729 sm->wpa_auth, NULL) == -1)
730 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
734 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
735 sm->pending_1_of_4_timeout = 0;
736 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
737 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
738 #ifdef CONFIG_IEEE80211R_AP
739 wpa_ft_sta_deinit(sm);
740 #endif /* CONFIG_IEEE80211R_AP */
741 if (sm->in_step_loop) {
742 /* Must not free state machine while wpa_sm_step() is running.
743 * Freeing will be completed in the end of wpa_sm_step(). */
744 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
745 "machine deinit for " MACSTR, MAC2STR(sm->addr));
746 sm->pending_deinit = 1;
752 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
757 sm->PTKRequest = TRUE;
762 static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
763 const u8 *replay_counter)
766 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
769 if (os_memcmp(replay_counter, ctr[i].counter,
770 WPA_REPLAY_COUNTER_LEN) == 0)
777 static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
778 const u8 *replay_counter)
781 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
783 (replay_counter == NULL ||
784 os_memcmp(replay_counter, ctr[i].counter,
785 WPA_REPLAY_COUNTER_LEN) == 0))
786 ctr[i].valid = FALSE;
791 #ifdef CONFIG_IEEE80211R_AP
792 static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
793 struct wpa_state_machine *sm,
794 struct wpa_eapol_ie_parse *kde)
796 struct wpa_ie_data ie;
797 struct rsn_mdie *mdie;
799 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
800 ie.num_pmkid != 1 || ie.pmkid == NULL) {
801 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
802 "FT 4-way handshake message 2/4");
806 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
807 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
808 sm->sup_pmk_r1_name, PMKID_LEN);
810 if (!kde->mdie || !kde->ftie) {
811 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
812 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
816 mdie = (struct rsn_mdie *) (kde->mdie + 2);
817 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
818 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
819 MOBILITY_DOMAIN_ID_LEN) != 0) {
820 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
824 if (sm->assoc_resp_ftie &&
825 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
826 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
827 2 + sm->assoc_resp_ftie[1]) != 0)) {
828 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
829 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
830 kde->ftie, kde->ftie_len);
831 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
832 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
838 #endif /* CONFIG_IEEE80211R_AP */
841 static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
842 struct wpa_state_machine *sm, int group)
844 /* Supplicant reported a Michael MIC error */
845 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
846 "received EAPOL-Key Error Request "
847 "(STA detected Michael MIC failure (group=%d))",
850 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
851 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
852 "ignore Michael MIC failure report since "
853 "group cipher is not TKIP");
854 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
855 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
856 "ignore Michael MIC failure report since "
857 "pairwise cipher is not TKIP");
859 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
860 return 1; /* STA entry was removed */
861 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
862 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
866 * Error report is not a request for a new key handshake, but since
867 * Authenticator may do it, let's change the keys now anyway.
869 wpa_request_new_ptk(sm);
874 static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
879 const u8 *pmk = NULL;
883 os_memset(&PTK, 0, sizeof(PTK));
885 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
886 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
887 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
888 sm->p2p_dev_addr, pmk, &pmk_len,
892 #ifdef CONFIG_IEEE80211R_AP
893 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
894 os_memcpy(sm->xxkey, pmk, pmk_len);
895 sm->xxkey_len = pmk_len;
897 #endif /* CONFIG_IEEE80211R_AP */
900 pmk_len = sm->pmk_len;
903 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
906 if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
907 data, data_len) == 0) {
908 if (sm->PMK != pmk) {
909 os_memcpy(sm->PMK, pmk, pmk_len);
910 sm->pmk_len = pmk_len;
916 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
917 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
922 wpa_printf(MSG_DEBUG,
923 "WPA: Earlier SNonce did not result in matching MIC");
927 wpa_printf(MSG_DEBUG,
928 "WPA: Earlier SNonce resulted in matching MIC");
929 sm->alt_snonce_valid = 0;
931 if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
932 wpa_auth_update_vlan(sm->wpa_auth, sm->addr, vlan_id) < 0)
935 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
936 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
937 forced_memzero(&PTK, sizeof(PTK));
938 sm->PTK_valid = TRUE;
944 void wpa_receive(struct wpa_authenticator *wpa_auth,
945 struct wpa_state_machine *sm,
946 u8 *data, size_t data_len)
948 struct ieee802_1x_hdr *hdr;
949 struct wpa_eapol_key *key;
950 u16 key_info, key_data_length;
951 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg;
953 struct wpa_eapol_ie_parse kde;
955 size_t keyhdrlen, mic_len;
958 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
960 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
962 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
963 keyhdrlen = sizeof(*key) + mic_len + 2;
965 if (data_len < sizeof(*hdr) + keyhdrlen) {
966 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
970 hdr = (struct ieee802_1x_hdr *) data;
971 key = (struct wpa_eapol_key *) (hdr + 1);
972 mic = (u8 *) (key + 1);
973 key_info = WPA_GET_BE16(key->key_info);
974 key_data = mic + mic_len + 2;
975 key_data_length = WPA_GET_BE16(mic + mic_len);
976 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
977 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
978 MAC2STR(sm->addr), key_info, key->type,
979 (unsigned int) mic_len, key_data_length);
980 wpa_hexdump(MSG_MSGDUMP,
981 "WPA: EAPOL-Key header (ending before Key MIC)",
983 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
985 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
986 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
987 "key_data overflow (%d > %lu)",
989 (unsigned long) (data_len - sizeof(*hdr) -
994 if (sm->wpa == WPA_VERSION_WPA2) {
995 if (key->type == EAPOL_KEY_TYPE_WPA) {
997 * Some deployed station implementations seem to send
998 * msg 4/4 with incorrect type value in WPA2 mode.
1000 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
1001 "with unexpected WPA type in RSN mode");
1002 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
1003 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1004 "unexpected type %d in RSN mode",
1009 if (key->type != EAPOL_KEY_TYPE_WPA) {
1010 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1011 "unexpected type %d in WPA mode",
1017 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
1019 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
1020 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1022 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
1025 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1026 wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message");
1030 if (key_info & WPA_KEY_INFO_REQUEST) {
1033 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1035 msgtxt = "2/2 Group";
1036 } else if (key_data_length == 0 ||
1037 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
1038 key_data_length == AES_BLOCK_SIZE)) {
1040 msgtxt = "4/4 Pairwise";
1043 msgtxt = "2/4 Pairwise";
1046 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1048 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1049 if (sm->pairwise == WPA_CIPHER_CCMP ||
1050 sm->pairwise == WPA_CIPHER_GCMP) {
1051 if (wpa_use_cmac(sm->wpa_key_mgmt) &&
1052 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
1053 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1054 wpa_auth_logger(wpa_auth, sm->addr,
1056 "advertised support for "
1057 "AES-128-CMAC, but did not "
1062 if (!wpa_use_cmac(sm->wpa_key_mgmt) &&
1063 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
1064 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1065 wpa_auth_logger(wpa_auth, sm->addr,
1067 "did not use HMAC-SHA1-AES "
1073 if (wpa_use_akm_defined(sm->wpa_key_mgmt) &&
1074 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1075 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1076 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1081 if (key_info & WPA_KEY_INFO_REQUEST) {
1082 if (sm->req_replay_counter_used &&
1083 os_memcmp(key->replay_counter, sm->req_replay_counter,
1084 WPA_REPLAY_COUNTER_LEN) <= 0) {
1085 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1086 "received EAPOL-Key request with "
1087 "replayed counter");
1092 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
1093 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
1096 if (msg == PAIRWISE_2 &&
1097 wpa_replay_counter_valid(sm->prev_key_replay,
1098 key->replay_counter) &&
1099 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1100 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1103 * Some supplicant implementations (e.g., Windows XP
1104 * WZC) update SNonce for each EAPOL-Key 2/4. This
1105 * breaks the workaround on accepting any of the
1106 * pending requests, so allow the SNonce to be updated
1107 * even if we have already sent out EAPOL-Key 3/4.
1109 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1110 "Process SNonce update from STA "
1111 "based on retransmitted EAPOL-Key "
1113 sm->update_snonce = 1;
1114 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1115 sm->alt_snonce_valid = TRUE;
1116 os_memcpy(sm->alt_replay_counter,
1117 sm->key_replay[0].counter,
1118 WPA_REPLAY_COUNTER_LEN);
1119 goto continue_processing;
1122 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1123 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1124 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1125 WPA_REPLAY_COUNTER_LEN) == 0) {
1127 * Supplicant may still be using the old SNonce since
1128 * there was two EAPOL-Key 2/4 messages and they had
1129 * different SNonce values.
1131 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1132 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
1133 goto continue_processing;
1136 if (msg == PAIRWISE_2 &&
1137 wpa_replay_counter_valid(sm->prev_key_replay,
1138 key->replay_counter) &&
1139 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1140 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1141 "ignore retransmitted EAPOL-Key %s - "
1142 "SNonce did not change", msgtxt);
1144 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1145 "received EAPOL-Key %s with "
1146 "unexpected replay counter", msgtxt);
1148 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1149 if (!sm->key_replay[i].valid)
1151 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1152 sm->key_replay[i].counter,
1153 WPA_REPLAY_COUNTER_LEN);
1155 wpa_hexdump(MSG_DEBUG, "received replay counter",
1156 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1160 continue_processing:
1162 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1163 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1164 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1165 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1168 #endif /* CONFIG_FILS */
1172 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
1173 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1174 (!sm->update_snonce ||
1175 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
1176 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1177 "received EAPOL-Key msg 2/4 in "
1178 "invalid state (%d) - dropped",
1182 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
1183 if (sm->group->reject_4way_hs_for_entropy) {
1185 * The system did not have enough entropy to generate
1186 * strong random numbers. Reject the first 4-way
1187 * handshake(s) and collect some entropy based on the
1188 * information from it. Once enough entropy is
1189 * available, the next atempt will trigger GMK/Key
1190 * Counter update and the station will be allowed to
1193 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1194 "collect more entropy for random number "
1196 random_mark_pool_ready();
1197 wpa_sta_disconnect(wpa_auth, sm->addr,
1198 WLAN_REASON_PREV_AUTH_NOT_VALID);
1203 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1205 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1206 "received EAPOL-Key msg 4/4 in "
1207 "invalid state (%d) - dropped",
1213 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1214 || !sm->PTK_valid) {
1215 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1216 "received EAPOL-Key msg 2/2 in "
1217 "invalid state (%d) - dropped",
1218 sm->wpa_ptk_group_state);
1226 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1227 "received EAPOL-Key frame (%s)", msgtxt);
1229 if (key_info & WPA_KEY_INFO_ACK) {
1230 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1231 "received invalid EAPOL-Key: Key Ack set");
1235 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1236 !(key_info & WPA_KEY_INFO_MIC)) {
1237 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1238 "received invalid EAPOL-Key: Key MIC not set");
1243 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1244 (key_info & WPA_KEY_INFO_MIC)) {
1245 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1246 "received invalid EAPOL-Key: Key MIC set");
1249 #endif /* CONFIG_FILS */
1251 sm->MICVerified = FALSE;
1252 if (sm->PTK_valid && !sm->update_snonce) {
1254 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1256 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1257 wpa_try_alt_snonce(sm, data, data_len))) {
1258 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1259 "received EAPOL-Key with invalid MIC");
1261 wpa_printf(MSG_INFO,
1262 "TEST: Ignore Key MIC failure for fuzz testing");
1264 #endif /* TEST_FUZZ */
1269 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1270 &key_data_length) < 0) {
1271 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1272 "received EAPOL-Key with invalid MIC");
1274 wpa_printf(MSG_INFO,
1275 "TEST: Ignore Key MIC failure for fuzz testing");
1277 #endif /* TEST_FUZZ */
1280 #endif /* CONFIG_FILS */
1283 #endif /* TEST_FUZZ */
1284 sm->MICVerified = TRUE;
1285 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
1286 sm->pending_1_of_4_timeout = 0;
1289 if (key_info & WPA_KEY_INFO_REQUEST) {
1290 if (sm->MICVerified) {
1291 sm->req_replay_counter_used = 1;
1292 os_memcpy(sm->req_replay_counter, key->replay_counter,
1293 WPA_REPLAY_COUNTER_LEN);
1295 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1296 "received EAPOL-Key request with "
1302 * TODO: should decrypt key data field if encryption was used;
1303 * even though MAC address KDE is not normally encrypted,
1304 * supplicant is allowed to encrypt it.
1306 if (key_info & WPA_KEY_INFO_ERROR) {
1307 if (wpa_receive_error_report(
1309 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1310 return; /* STA entry was removed */
1311 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1312 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1313 "received EAPOL-Key Request for new "
1315 wpa_request_new_ptk(sm);
1316 } else if (key_data_length > 0 &&
1317 wpa_parse_kde_ies(key_data, key_data_length,
1321 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1322 "received EAPOL-Key Request for GTK "
1324 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1325 wpa_rekey_gtk(wpa_auth, NULL);
1328 /* Do not allow the same key replay counter to be reused. */
1329 wpa_replay_counter_mark_invalid(sm->key_replay,
1330 key->replay_counter);
1332 if (msg == PAIRWISE_2) {
1334 * Maintain a copy of the pending EAPOL-Key frames in
1335 * case the EAPOL-Key frame was retransmitted. This is
1336 * needed to allow EAPOL-Key msg 2/4 reply to another
1337 * pending msg 1/4 to update the SNonce to work around
1338 * unexpected supplicant behavior.
1340 os_memcpy(sm->prev_key_replay, sm->key_replay,
1341 sizeof(sm->key_replay));
1343 os_memset(sm->prev_key_replay, 0,
1344 sizeof(sm->prev_key_replay));
1348 * Make sure old valid counters are not accepted anymore and
1349 * do not get copied again.
1351 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
1354 os_free(sm->last_rx_eapol_key);
1355 sm->last_rx_eapol_key = os_memdup(data, data_len);
1356 if (sm->last_rx_eapol_key == NULL)
1358 sm->last_rx_eapol_key_len = data_len;
1360 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
1361 sm->EAPOLKeyReceived = TRUE;
1362 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1363 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1364 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1369 static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1370 const u8 *gnonce, u8 *gtk, size_t gtk_len)
1372 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN];
1376 /* GTK = PRF-X(GMK, "Group key expansion",
1377 * AA || GNonce || Time || random data)
1378 * The example described in the IEEE 802.11 standard uses only AA and
1379 * GNonce as inputs here. Add some more entropy since this derivation
1380 * is done only at the Authenticator and as such, does not need to be
1383 os_memset(data, 0, sizeof(data));
1384 os_memcpy(data, addr, ETH_ALEN);
1385 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1386 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1387 wpa_get_ntp_timestamp(pos);
1389 os_memset(pos, 0xef, 8);
1390 #endif /* TEST_FUZZ */
1392 if (random_get_bytes(pos, gtk_len) < 0)
1395 #ifdef CONFIG_SHA384
1396 if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1399 #else /* CONFIG_SHA384 */
1400 #ifdef CONFIG_SHA256
1401 if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1404 #else /* CONFIG_SHA256 */
1405 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1408 #endif /* CONFIG_SHA256 */
1409 #endif /* CONFIG_SHA384 */
1411 forced_memzero(data, sizeof(data));
1417 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1419 struct wpa_authenticator *wpa_auth = eloop_ctx;
1420 struct wpa_state_machine *sm = timeout_ctx;
1422 sm->pending_1_of_4_timeout = 0;
1423 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1424 sm->TimeoutEvt = TRUE;
1429 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1430 struct wpa_state_machine *sm, int key_info,
1431 const u8 *key_rsc, const u8 *nonce,
1432 const u8 *kde, size_t kde_len,
1433 int keyidx, int encr, int force_version)
1435 struct ieee802_1x_hdr *hdr;
1436 struct wpa_eapol_key *key;
1437 size_t len, mic_len, keyhdrlen;
1439 int key_data_len, pad_len = 0;
1441 int version, pairwise;
1443 u8 *key_mic, *key_data;
1445 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
1446 keyhdrlen = sizeof(*key) + mic_len + 2;
1448 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
1451 version = force_version;
1452 else if (wpa_use_akm_defined(sm->wpa_key_mgmt))
1453 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
1454 else if (wpa_use_cmac(sm->wpa_key_mgmt))
1455 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1456 else if (sm->pairwise != WPA_CIPHER_TKIP)
1457 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1459 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1461 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1463 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1464 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1467 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1468 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1469 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1470 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1471 pairwise, (unsigned long) kde_len, keyidx, encr);
1473 key_data_len = kde_len;
1475 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1476 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
1477 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1478 pad_len = key_data_len % 8;
1480 pad_len = 8 - pad_len;
1481 key_data_len += pad_len + 8;
1484 len += key_data_len;
1485 if (!mic_len && encr)
1486 len += AES_BLOCK_SIZE;
1488 hdr = os_zalloc(len);
1491 hdr->version = wpa_auth->conf.eapol_version;
1492 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1493 hdr->length = host_to_be16(len - sizeof(*hdr));
1494 key = (struct wpa_eapol_key *) (hdr + 1);
1495 key_mic = (u8 *) (key + 1);
1496 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
1498 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1499 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1500 key_info |= version;
1501 if (encr && sm->wpa == WPA_VERSION_WPA2)
1502 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1503 if (sm->wpa != WPA_VERSION_WPA2)
1504 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1505 WPA_PUT_BE16(key->key_info, key_info);
1507 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1508 if (sm->wpa == WPA_VERSION_WPA2 && !pairwise)
1509 WPA_PUT_BE16(key->key_length, 0);
1511 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
1513 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1514 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1515 os_memcpy(sm->key_replay[i].counter,
1516 sm->key_replay[i - 1].counter,
1517 WPA_REPLAY_COUNTER_LEN);
1519 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1520 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1521 WPA_REPLAY_COUNTER_LEN);
1522 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1523 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1524 sm->key_replay[0].valid = TRUE;
1527 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1530 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1533 os_memcpy(key_data, kde, kde_len);
1534 WPA_PUT_BE16(key_mic + mic_len, kde_len);
1536 } else if (!mic_len && kde) {
1540 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1541 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1544 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1545 sm->PTK.kek, sm->PTK.kek_len);
1546 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1547 * to Key Data (exclusive). */
1548 aad[0] = (u8 *) hdr;
1549 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1550 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1551 1, aad, aad_len, key_mic + 2) < 0) {
1552 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1556 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1557 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1558 #endif /* CONFIG_FILS */
1559 } else if (encr && kde) {
1560 buf = os_zalloc(key_data_len);
1566 os_memcpy(pos, kde, kde_len);
1572 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1574 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1575 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
1576 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1577 wpa_printf(MSG_DEBUG,
1578 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1579 (unsigned int) sm->PTK.kek_len);
1580 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
1581 (key_data_len - 8) / 8, buf, key_data)) {
1586 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
1587 #ifndef CONFIG_NO_RC4
1588 } else if (sm->PTK.kek_len == 16) {
1591 wpa_printf(MSG_DEBUG,
1592 "WPA: Encrypt Key Data using RC4");
1593 os_memcpy(key->key_iv,
1594 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1595 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1596 os_memcpy(ek, key->key_iv, 16);
1597 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
1598 os_memcpy(key_data, buf, key_data_len);
1599 rc4_skip(ek, 32, 256, key_data, key_data_len);
1600 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
1601 #endif /* CONFIG_NO_RC4 */
1610 if (key_info & WPA_KEY_INFO_MIC) {
1611 if (!sm->PTK_valid || !mic_len) {
1612 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1613 "PTK not valid when sending EAPOL-Key "
1619 if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1620 sm->wpa_key_mgmt, version,
1621 (u8 *) hdr, len, key_mic) < 0) {
1625 #ifdef CONFIG_TESTING_OPTIONS
1627 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
1629 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1630 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1631 "Corrupting group EAPOL-Key Key MIC");
1634 #endif /* CONFIG_TESTING_OPTIONS */
1637 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1639 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1645 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1646 struct wpa_state_machine *sm, int key_info,
1647 const u8 *key_rsc, const u8 *nonce,
1648 const u8 *kde, size_t kde_len,
1649 int keyidx, int encr)
1652 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1658 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1661 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1662 if (ctr == 1 && wpa_auth->conf.tx_status)
1663 timeout_ms = pairwise ? eapol_key_timeout_first :
1664 eapol_key_timeout_first_group;
1666 timeout_ms = eapol_key_timeout_subseq;
1667 if (wpa_auth->conf.wpa_disable_eapol_key_retries &&
1668 (!pairwise || (key_info & WPA_KEY_INFO_MIC)))
1669 timeout_ms = eapol_key_timeout_no_retrans;
1670 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1671 sm->pending_1_of_4_timeout = 1;
1674 #endif /* TEST_FUZZ */
1675 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1676 "counter %u)", timeout_ms, ctr);
1677 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1678 wpa_send_eapol_timeout, wpa_auth, sm);
1682 static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1683 u8 *data, size_t data_len)
1685 struct ieee802_1x_hdr *hdr;
1686 struct wpa_eapol_key *key;
1689 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
1690 size_t mic_len = wpa_mic_len(akmp, pmk_len);
1692 if (data_len < sizeof(*hdr) + sizeof(*key))
1695 hdr = (struct ieee802_1x_hdr *) data;
1696 key = (struct wpa_eapol_key *) (hdr + 1);
1697 mic_pos = (u8 *) (key + 1);
1698 key_info = WPA_GET_BE16(key->key_info);
1699 os_memcpy(mic, mic_pos, mic_len);
1700 os_memset(mic_pos, 0, mic_len);
1701 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1702 key_info & WPA_KEY_INFO_TYPE_MASK,
1703 data, data_len, mic_pos) ||
1704 os_memcmp_const(mic, mic_pos, mic_len) != 0)
1706 os_memcpy(mic_pos, mic, mic_len);
1711 void wpa_remove_ptk(struct wpa_state_machine *sm)
1713 sm->PTK_valid = FALSE;
1714 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1715 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1717 wpa_printf(MSG_DEBUG,
1718 "RSN: PTK removal from the driver failed");
1719 sm->pairwise_set = FALSE;
1720 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1724 int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
1731 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1732 "event %d notification", event);
1737 /* PTKs are derived through AMPE */
1738 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1743 #endif /* CONFIG_MESH */
1748 sm->DeauthenticationRequest = TRUE;
1749 #ifdef CONFIG_IEEE80211R_AP
1750 os_memset(sm->PMK, 0, sizeof(sm->PMK));
1752 os_memset(sm->xxkey, 0, sizeof(sm->xxkey));
1754 os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1));
1756 #endif /* CONFIG_IEEE80211R_AP */
1759 case WPA_REAUTH_EAPOL:
1762 * When using WPS, we may end up here if the STA
1763 * manages to re-associate without the previous STA
1764 * entry getting removed. Consequently, we need to make
1765 * sure that the WPA state machines gets initialized
1766 * properly at this point.
1768 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1769 "started - initialize now");
1772 if (wpa_sm_step(sm) == 1)
1773 return 1; /* should not really happen */
1775 sm->AuthenticationRequest = TRUE;
1778 if (sm->GUpdateStationKeys) {
1780 * Reauthentication cancels the pending group key
1781 * update for this STA.
1783 sm->group->GKeyDoneStations--;
1784 sm->GUpdateStationKeys = FALSE;
1785 sm->PtkGroupInit = TRUE;
1787 sm->ReAuthenticationRequest = TRUE;
1790 #ifdef CONFIG_IEEE80211R_AP
1791 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1792 "after association");
1793 wpa_ft_install_ptk(sm);
1795 /* Using FT protocol, not WPA auth state machine */
1796 sm->ft_completed = 1;
1797 wpa_auth_set_ptk_rekey_timer(sm);
1799 #else /* CONFIG_IEEE80211R_AP */
1801 #endif /* CONFIG_IEEE80211R_AP */
1802 case WPA_ASSOC_FILS:
1804 wpa_printf(MSG_DEBUG,
1805 "FILS: TK configuration after association");
1807 sm->fils_completed = 1;
1809 #else /* CONFIG_FILS */
1811 #endif /* CONFIG_FILS */
1812 case WPA_DRV_STA_REMOVED:
1813 sm->tk_already_set = FALSE;
1817 #ifdef CONFIG_IEEE80211R_AP
1818 sm->ft_completed = 0;
1819 #endif /* CONFIG_IEEE80211R_AP */
1821 #ifdef CONFIG_IEEE80211W
1822 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1824 #endif /* CONFIG_IEEE80211W */
1826 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1827 (event == WPA_AUTH || event == WPA_ASSOC))
1829 #endif /* CONFIG_FILS */
1832 sm->PTK_valid = FALSE;
1833 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1835 if (event != WPA_REAUTH_EAPOL)
1839 if (sm->in_step_loop) {
1841 * wpa_sm_step() is already running - avoid recursive call to
1842 * it by making the existing loop process the new update.
1847 return wpa_sm_step(sm);
1851 SM_STATE(WPA_PTK, INITIALIZE)
1853 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1855 /* Init flag is not cleared here, so avoid busy
1856 * loop by claiming nothing changed. */
1857 sm->changed = FALSE;
1861 if (sm->GUpdateStationKeys)
1862 sm->group->GKeyDoneStations--;
1863 sm->GUpdateStationKeys = FALSE;
1864 if (sm->wpa == WPA_VERSION_WPA)
1865 sm->PInitAKeys = FALSE;
1866 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1867 * Local AA > Remote AA)) */) {
1870 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1872 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1874 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
1875 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
1876 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
1877 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1878 WPA_EAPOL_authorized, 0);
1883 SM_STATE(WPA_PTK, DISCONNECT)
1885 u16 reason = sm->disconnect_reason;
1887 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1888 sm->Disconnect = FALSE;
1889 sm->disconnect_reason = 0;
1891 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1892 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
1896 SM_STATE(WPA_PTK, DISCONNECTED)
1898 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1899 sm->DeauthenticationRequest = FALSE;
1903 SM_STATE(WPA_PTK, AUTHENTICATION)
1905 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1906 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1907 sm->PTK_valid = FALSE;
1908 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1910 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1911 sm->AuthenticationRequest = FALSE;
1915 static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1916 struct wpa_group *group)
1918 if (group->first_sta_seen)
1921 * System has run bit further than at the time hostapd was started
1922 * potentially very early during boot up. This provides better chances
1923 * of collecting more randomness on embedded systems. Re-initialize the
1924 * GMK and Counter here to improve their strength if there was not
1925 * enough entropy available immediately after system startup.
1927 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1929 if (random_pool_ready() != 1) {
1930 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1931 "to proceed - reject first 4-way handshake");
1932 group->reject_4way_hs_for_entropy = TRUE;
1934 group->first_sta_seen = TRUE;
1935 group->reject_4way_hs_for_entropy = FALSE;
1938 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1939 wpa_gtk_update(wpa_auth, group) < 0 ||
1940 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1941 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1942 group->first_sta_seen = FALSE;
1943 group->reject_4way_hs_for_entropy = TRUE;
1948 SM_STATE(WPA_PTK, AUTHENTICATION2)
1950 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1952 wpa_group_ensure_init(sm->wpa_auth, sm->group);
1953 sm->ReAuthenticationRequest = FALSE;
1956 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1957 * ambiguous. The Authenticator state machine uses a counter that is
1958 * incremented by one for each 4-way handshake. However, the security
1959 * analysis of 4-way handshake points out that unpredictable nonces
1960 * help in preventing precomputation attacks. Instead of the state
1961 * machine definition, use an unpredictable nonce value here to provide
1962 * stronger protection against potential precomputation attacks.
1964 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1965 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1967 sm->Disconnect = TRUE;
1970 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1972 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1973 * logical place than INITIALIZE since AUTHENTICATION2 can be
1974 * re-entered on ReAuthenticationRequest without going through
1980 static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1982 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1983 wpa_printf(MSG_ERROR,
1984 "WPA: Failed to get random data for ANonce");
1985 sm->Disconnect = TRUE;
1988 wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1995 SM_STATE(WPA_PTK, INITPMK)
1997 u8 msk[2 * PMK_LEN];
1998 size_t len = 2 * PMK_LEN;
2000 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
2001 #ifdef CONFIG_IEEE80211R_AP
2003 #endif /* CONFIG_IEEE80211R_AP */
2005 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
2006 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2007 sm->pmk_len = sm->pmksa->pmk_len;
2009 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
2010 wpa_printf(MSG_DEBUG,
2011 "DPP: No PMKSA cache entry for STA - reject connection");
2012 sm->Disconnect = TRUE;
2013 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
2015 #endif /* CONFIG_DPP */
2016 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
2017 unsigned int pmk_len;
2019 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
2020 pmk_len = PMK_LEN_SUITE_B_192;
2023 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
2024 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
2026 if (len < pmk_len) {
2027 wpa_printf(MSG_DEBUG,
2028 "WPA: MSK not long enough (%u) to create PMK (%u)",
2029 (unsigned int) len, (unsigned int) pmk_len);
2030 sm->Disconnect = TRUE;
2033 os_memcpy(sm->PMK, msk, pmk_len);
2034 sm->pmk_len = pmk_len;
2035 #ifdef CONFIG_IEEE80211R_AP
2036 if (len >= 2 * PMK_LEN) {
2037 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
2038 os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN);
2039 sm->xxkey_len = SHA384_MAC_LEN;
2041 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
2042 sm->xxkey_len = PMK_LEN;
2045 #endif /* CONFIG_IEEE80211R_AP */
2047 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
2048 sm->wpa_auth->cb->get_msk);
2049 sm->Disconnect = TRUE;
2052 forced_memzero(msk, sizeof(msk));
2054 sm->req_replay_counter_used = 0;
2055 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
2056 * will break reauthentication since EAPOL state machines may not be
2057 * get into AUTHENTICATING state that clears keyRun before WPA state
2058 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
2059 * state and takes PMK from the previously used AAA Key. This will
2060 * eventually fail in 4-Way Handshake because Supplicant uses PMK
2061 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
2062 * be good workaround for this issue. */
2063 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
2067 SM_STATE(WPA_PTK, INITPSK)
2072 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
2073 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
2076 os_memcpy(sm->PMK, psk, psk_len);
2077 sm->pmk_len = psk_len;
2078 #ifdef CONFIG_IEEE80211R_AP
2079 os_memcpy(sm->xxkey, psk, PMK_LEN);
2080 sm->xxkey_len = PMK_LEN;
2081 #endif /* CONFIG_IEEE80211R_AP */
2084 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2085 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2086 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2087 sm->pmk_len = sm->pmksa->pmk_len;
2088 #ifdef CONFIG_IEEE80211R_AP
2089 os_memcpy(sm->xxkey, sm->pmksa->pmk, sm->pmksa->pmk_len);
2090 sm->xxkey_len = sm->pmksa->pmk_len;
2091 #endif /* CONFIG_IEEE80211R_AP */
2093 #endif /* CONFIG_SAE */
2094 sm->req_replay_counter_used = 0;
2098 SM_STATE(WPA_PTK, PTKSTART)
2100 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2101 size_t pmkid_len = 0;
2103 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2104 sm->PTKRequest = FALSE;
2105 sm->TimeoutEvt = FALSE;
2106 sm->alt_snonce_valid = FALSE;
2109 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
2110 /* No point in sending the EAPOL-Key - we will disconnect
2111 * immediately following this. */
2115 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2116 "sending 1/4 msg of 4-Way Handshake");
2118 * For infrastructure BSS cases, it is better for the AP not to include
2119 * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate
2120 * offline search for the passphrase/PSK without having to be able to
2121 * capture a 4-way handshake from a STA that has access to the network.
2123 * For IBSS cases, addition of PMKID KDE could be considered even with
2124 * WPA2-PSK cases that use multiple PSKs, but only if there is a single
2125 * possible PSK for this STA. However, this should not be done unless
2126 * there is support for using that information on the supplicant side.
2127 * The concern about exposing PMKID unnecessarily in infrastructure BSS
2128 * cases would also apply here, but at least in the IBSS case, this
2129 * would cover a potential real use case.
2131 if (sm->wpa == WPA_VERSION_WPA2 &&
2132 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
2133 (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
2134 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
2135 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
2137 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2138 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2139 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2140 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
2142 wpa_hexdump(MSG_DEBUG,
2143 "RSN: Message 1/4 PMKID from PMKSA entry",
2144 sm->pmksa->pmkid, PMKID_LEN);
2145 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2146 sm->pmksa->pmkid, PMKID_LEN);
2147 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2148 /* No KCK available to derive PMKID */
2149 wpa_printf(MSG_DEBUG,
2150 "RSN: No KCK available to derive PMKID for message 1/4");
2153 } else if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2154 if (sm->pmkid_set) {
2155 wpa_hexdump(MSG_DEBUG,
2156 "RSN: Message 1/4 PMKID from FILS/ERP",
2157 sm->pmkid, PMKID_LEN);
2158 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2159 sm->pmkid, PMKID_LEN);
2161 /* No PMKID available */
2162 wpa_printf(MSG_DEBUG,
2163 "RSN: No FILS/ERP PMKID available for message 1/4");
2166 #endif /* CONFIG_FILS */
2167 #ifdef CONFIG_IEEE80211R_AP
2168 } else if (wpa_key_mgmt_ft(sm->wpa_key_mgmt) &&
2170 wpa_printf(MSG_DEBUG,
2171 "FT: No PMKID in message 1/4 when using FT protocol");
2174 #endif /* CONFIG_IEEE80211R_AP */
2176 } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2177 if (sm->pmkid_set) {
2178 wpa_hexdump(MSG_DEBUG,
2179 "RSN: Message 1/4 PMKID from SAE",
2180 sm->pmkid, PMKID_LEN);
2181 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2182 sm->pmkid, PMKID_LEN);
2184 /* No PMKID available */
2185 wpa_printf(MSG_DEBUG,
2186 "RSN: No SAE PMKID available for message 1/4");
2189 #endif /* CONFIG_SAE */
2192 * Calculate PMKID since no PMKSA cache entry was
2193 * available with pre-calculated PMKID.
2195 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
2196 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2198 wpa_hexdump(MSG_DEBUG,
2199 "RSN: Message 1/4 PMKID derived from PMK",
2200 &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN);
2203 wpa_send_eapol(sm->wpa_auth, sm,
2204 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2205 sm->ANonce, pmkid, pmkid_len, 0, 0);
2209 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
2210 const u8 *pmk, unsigned int pmk_len,
2211 struct wpa_ptk *ptk)
2216 #ifdef CONFIG_IEEE80211R_AP
2217 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2218 if (sm->ft_completed) {
2219 u8 ptk_name[WPA_PMK_NAME_LEN];
2221 return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len,
2222 sm->SNonce, sm->ANonce,
2223 sm->addr, sm->wpa_auth->addr,
2229 return wpa_auth_derive_ptk_ft(sm, ptk);
2231 #endif /* CONFIG_IEEE80211R_AP */
2234 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) {
2235 z = wpabuf_head(sm->dpp_z);
2236 z_len = wpabuf_len(sm->dpp_z);
2238 #endif /* CONFIG_DPP2 */
2240 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
2241 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2242 ptk, sm->wpa_key_mgmt, sm->pairwise, z, z_len);
2248 int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
2249 size_t pmk_len, const u8 *snonce, const u8 *anonce,
2250 const u8 *dhss, size_t dhss_len,
2251 struct wpabuf *g_sta, struct wpabuf *g_ap)
2253 u8 ick[FILS_ICK_MAX_LEN];
2256 u8 fils_ft[FILS_FT_MAX_LEN];
2257 size_t fils_ft_len = 0;
2259 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
2260 snonce, anonce, dhss, dhss_len,
2261 &sm->PTK, ick, &ick_len,
2262 sm->wpa_key_mgmt, sm->pairwise,
2263 fils_ft, &fils_ft_len);
2266 sm->PTK_valid = TRUE;
2267 sm->tk_already_set = FALSE;
2269 #ifdef CONFIG_IEEE80211R_AP
2271 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2272 struct wpa_auth_config *conf = &wpa_auth->conf;
2273 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2274 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2275 size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
2277 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2278 conf->ssid, conf->ssid_len,
2279 conf->mobility_domain,
2280 conf->r0_key_holder,
2281 conf->r0_key_holder_len,
2282 sm->addr, pmk_r0, pmk_r0_name,
2286 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
2287 pmk_r0, pmk_r0_len);
2288 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2289 pmk_r0_name, WPA_PMK_NAME_LEN);
2290 wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name);
2291 forced_memzero(fils_ft, sizeof(fils_ft));
2293 res = wpa_derive_pmk_r1_name(pmk_r0_name, conf->r1_key_holder,
2294 sm->addr, sm->pmk_r1_name,
2296 forced_memzero(pmk_r0, PMK_LEN_MAX);
2299 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name,
2301 sm->pmk_r1_name_valid = 1;
2303 #endif /* CONFIG_IEEE80211R_AP */
2305 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2306 sm->addr, sm->wpa_auth->addr,
2307 g_sta ? wpabuf_head(g_sta) : NULL,
2308 g_sta ? wpabuf_len(g_sta) : 0,
2309 g_ap ? wpabuf_head(g_ap) : NULL,
2310 g_ap ? wpabuf_len(g_ap) : 0,
2311 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2312 sm->fils_key_auth_ap,
2313 &sm->fils_key_auth_len);
2314 forced_memzero(ick, sizeof(ick));
2316 /* Store nonces for (Re)Association Request/Response frame processing */
2317 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2318 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2324 static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
2325 u8 *buf, size_t buf_len, u16 *_key_data_len)
2327 struct ieee802_1x_hdr *hdr;
2328 struct wpa_eapol_key *key;
2335 hdr = (struct ieee802_1x_hdr *) buf;
2336 key = (struct wpa_eapol_key *) (hdr + 1);
2337 pos = (u8 *) (key + 1);
2338 key_data_len = WPA_GET_BE16(pos);
2339 if (key_data_len < AES_BLOCK_SIZE ||
2340 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2341 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2342 "No room for AES-SIV data in the frame");
2345 pos += 2; /* Pointing at the Encrypted Key Data field */
2347 tmp = os_malloc(key_data_len);
2351 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2352 * to Key Data (exclusive). */
2354 aad_len[0] = pos - buf;
2355 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2356 1, aad, aad_len, tmp) < 0) {
2357 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2358 "Invalid AES-SIV data in the frame");
2359 bin_clear_free(tmp, key_data_len);
2363 /* AEAD decryption and validation completed successfully */
2364 key_data_len -= AES_BLOCK_SIZE;
2365 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2368 /* Replace Key Data field with the decrypted version */
2369 os_memcpy(pos, tmp, key_data_len);
2370 pos -= 2; /* Key Data Length field */
2371 WPA_PUT_BE16(pos, key_data_len);
2372 bin_clear_free(tmp, key_data_len);
2374 *_key_data_len = key_data_len;
2379 const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2380 const u8 *ies, size_t ies_len,
2381 const u8 *fils_session)
2384 const u8 *session = NULL;
2386 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2387 wpa_printf(MSG_DEBUG,
2388 "FILS: Not a FILS AKM - reject association");
2392 /* Verify Session element */
2394 end = ((const u8 *) ie) + ies_len;
2395 while (ie + 1 < end) {
2396 if (ie + 2 + ie[1] > end)
2398 if (ie[0] == WLAN_EID_EXTENSION &&
2399 ie[1] >= 1 + FILS_SESSION_LEN &&
2400 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2408 wpa_printf(MSG_DEBUG,
2409 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2414 if (!fils_session) {
2415 wpa_printf(MSG_DEBUG,
2416 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2421 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2422 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2423 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2424 fils_session, FILS_SESSION_LEN);
2425 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2426 session + 3, FILS_SESSION_LEN);
2433 int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2436 struct ieee802_11_elems elems;
2438 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2439 wpa_printf(MSG_DEBUG,
2440 "FILS: Failed to parse decrypted elements");
2444 if (!elems.fils_session) {
2445 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2449 if (!elems.fils_key_confirm) {
2450 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2454 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2455 wpa_printf(MSG_DEBUG,
2456 "FILS: Unexpected Key-Auth length %d (expected %d)",
2457 elems.fils_key_confirm_len,
2458 (int) sm->fils_key_auth_len);
2462 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2463 sm->fils_key_auth_len) != 0) {
2464 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2465 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2466 elems.fils_key_confirm, elems.fils_key_confirm_len);
2467 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2468 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2476 int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2477 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2478 u8 *pos, size_t left)
2481 const u8 *end, *ie_start, *ie, *session, *crypt;
2485 if (!sm || !sm->PTK_valid) {
2486 wpa_printf(MSG_DEBUG,
2487 "FILS: No KEK to decrypt Assocication Request frame");
2491 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2492 wpa_printf(MSG_DEBUG,
2493 "FILS: Not a FILS AKM - reject association");
2497 end = ((const u8 *) mgmt) + frame_len;
2498 fc = le_to_host16(mgmt->frame_control);
2499 stype = WLAN_FC_GET_STYPE(fc);
2500 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2501 ie_start = mgmt->u.reassoc_req.variable;
2503 ie_start = mgmt->u.assoc_req.variable;
2507 * Find FILS Session element which is the last unencrypted element in
2510 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2513 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
2517 crypt = session + 2 + session[1];
2519 if (end - crypt < AES_BLOCK_SIZE) {
2520 wpa_printf(MSG_DEBUG,
2521 "FILS: Too short frame to include AES-SIV data");
2525 /* AES-SIV AAD vectors */
2527 /* The STA's MAC address */
2529 aad_len[0] = ETH_ALEN;
2530 /* The AP's BSSID */
2532 aad_len[1] = ETH_ALEN;
2533 /* The STA's nonce */
2534 aad[2] = sm->SNonce;
2535 aad_len[2] = FILS_NONCE_LEN;
2536 /* The AP's nonce */
2537 aad[3] = sm->ANonce;
2538 aad_len[3] = FILS_NONCE_LEN;
2540 * The (Re)Association Request frame from the Capability Information
2541 * field to the FILS Session element (both inclusive).
2543 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
2544 aad_len[4] = crypt - aad[4];
2546 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
2547 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
2548 wpa_printf(MSG_DEBUG,
2549 "FILS: Invalid AES-SIV data in the frame");
2552 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2553 pos, left - AES_BLOCK_SIZE);
2555 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2556 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
2560 return left - AES_BLOCK_SIZE;
2564 int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
2565 size_t current_len, size_t max_len,
2566 const struct wpabuf *hlp)
2568 u8 *end = buf + max_len;
2569 u8 *pos = buf + current_len;
2570 struct ieee80211_mgmt *mgmt;
2571 struct wpabuf *plain;
2575 if (!sm || !sm->PTK_valid)
2578 wpa_hexdump(MSG_DEBUG,
2579 "FILS: Association Response frame before FILS processing",
2582 mgmt = (struct ieee80211_mgmt *) buf;
2584 /* AES-SIV AAD vectors */
2586 /* The AP's BSSID */
2588 aad_len[0] = ETH_ALEN;
2589 /* The STA's MAC address */
2591 aad_len[1] = ETH_ALEN;
2592 /* The AP's nonce */
2593 aad[2] = sm->ANonce;
2594 aad_len[2] = FILS_NONCE_LEN;
2595 /* The STA's nonce */
2596 aad[3] = sm->SNonce;
2597 aad_len[3] = FILS_NONCE_LEN;
2599 * The (Re)Association Response frame from the Capability Information
2600 * field (the same offset in both Association and Reassociation
2601 * Response frames) to the FILS Session element (both inclusive).
2603 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2604 aad_len[4] = pos - aad[4];
2606 /* The following elements will be encrypted with AES-SIV */
2607 plain = fils_prepare_plainbuf(sm, hlp);
2609 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2613 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2614 wpa_printf(MSG_DEBUG,
2615 "FILS: Not enough room for FILS elements");
2616 wpabuf_clear_free(plain);
2620 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2623 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2624 wpabuf_head(plain), wpabuf_len(plain),
2625 5, aad, aad_len, pos) < 0) {
2626 wpabuf_clear_free(plain);
2630 wpa_hexdump(MSG_DEBUG,
2631 "FILS: Encrypted Association Response elements",
2632 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2633 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2634 wpabuf_clear_free(plain);
2636 sm->fils_completed = 1;
2642 static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2643 const struct wpabuf *hlp)
2645 struct wpabuf *plain;
2646 u8 *len, *tmp, *tmp2;
2648 u8 *gtk, dummy_gtk[32];
2650 struct wpa_group *gsm;
2652 plain = wpabuf_alloc(1000);
2656 /* TODO: FILS Public Key */
2658 /* FILS Key Confirmation */
2659 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2660 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2661 /* Element ID Extension */
2662 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2663 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2665 /* FILS HLP Container */
2667 wpabuf_put_buf(plain, hlp);
2669 /* TODO: FILS IP Address Assignment */
2673 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2674 len = wpabuf_put(plain, 1);
2675 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2676 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2677 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2679 gtk = gsm->GTK[gsm->GN - 1];
2680 gtk_len = gsm->GTK_len;
2681 if (sm->wpa_auth->conf.disable_gtk ||
2682 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
2684 * Provide unique random GTK to each STA to prevent use
2685 * of GTK in the BSS.
2687 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2688 wpabuf_clear_free(plain);
2693 hdr[0] = gsm->GN & 0x03;
2695 tmp = wpabuf_put(plain, 0);
2696 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2698 wpabuf_put(plain, tmp2 - tmp);
2701 tmp = wpabuf_put(plain, 0);
2702 tmp2 = ieee80211w_kde_add(sm, tmp);
2703 wpabuf_put(plain, tmp2 - tmp);
2705 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
2708 if (wpa_auth_uses_ocv(sm)) {
2709 struct wpa_channel_info ci;
2712 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2713 wpa_printf(MSG_WARNING,
2714 "FILS: Failed to get channel info for OCI element");
2715 wpabuf_clear_free(plain);
2719 pos = wpabuf_put(plain, OCV_OCI_EXTENDED_LEN);
2720 if (ocv_insert_extended_oci(&ci, pos) < 0) {
2721 wpabuf_clear_free(plain);
2725 #endif /* CONFIG_OCV */
2731 int fils_set_tk(struct wpa_state_machine *sm)
2736 if (!sm || !sm->PTK_valid) {
2737 wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK");
2740 if (sm->tk_already_set) {
2741 wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver");
2745 alg = wpa_cipher_to_alg(sm->pairwise);
2746 klen = wpa_cipher_key_len(sm->pairwise);
2748 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2749 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2750 sm->PTK.tk, klen)) {
2751 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2754 sm->tk_already_set = TRUE;
2760 u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
2761 const u8 *fils_session, struct wpabuf *hlp)
2763 struct wpabuf *plain;
2767 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2768 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2769 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2770 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2771 pos += FILS_SESSION_LEN;
2773 plain = fils_prepare_plainbuf(sm, hlp);
2775 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2779 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2780 pos += wpabuf_len(plain);
2782 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2783 (unsigned int) wpabuf_len(plain));
2784 wpabuf_clear_free(plain);
2785 sm->fils_completed = 1;
2789 #endif /* CONFIG_FILS */
2793 int get_sta_tx_parameters(struct wpa_state_machine *sm, int ap_max_chanwidth,
2794 int ap_seg1_idx, int *bandwidth, int *seg1_idx)
2796 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2798 if (!wpa_auth->cb->get_sta_tx_params)
2800 return wpa_auth->cb->get_sta_tx_params(wpa_auth->cb_ctx, sm->addr,
2801 ap_max_chanwidth, ap_seg1_idx,
2802 bandwidth, seg1_idx);
2804 #endif /* CONFIG_OCV */
2807 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2809 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2811 int ok = 0, psk_found = 0;
2812 const u8 *pmk = NULL;
2815 const u8 *eapol_key_ie, *key_data, *mic;
2816 u16 key_data_length;
2817 size_t mic_len, eapol_key_ie_len;
2818 struct ieee802_1x_hdr *hdr;
2819 struct wpa_eapol_key *key;
2820 struct wpa_eapol_ie_parse kde;
2823 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2824 sm->EAPOLKeyReceived = FALSE;
2825 sm->update_snonce = FALSE;
2826 os_memset(&PTK, 0, sizeof(PTK));
2828 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
2830 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2831 * WPA-PSK: iterate through possible PSKs and select the one matching
2834 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2835 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2836 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2837 sm->p2p_dev_addr, pmk, &pmk_len,
2842 #ifdef CONFIG_IEEE80211R_AP
2843 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2844 os_memcpy(sm->xxkey, pmk, pmk_len);
2845 sm->xxkey_len = pmk_len;
2847 #endif /* CONFIG_IEEE80211R_AP */
2850 pmk_len = sm->pmk_len;
2853 if ((!pmk || !pmk_len) && sm->pmksa) {
2854 wpa_printf(MSG_DEBUG, "WPA: Use PMK from PMKSA cache");
2855 pmk = sm->pmksa->pmk;
2856 pmk_len = sm->pmksa->pmk_len;
2859 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2863 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
2864 sm->last_rx_eapol_key,
2865 sm->last_rx_eapol_key_len) == 0) {
2866 if (sm->PMK != pmk) {
2867 os_memcpy(sm->PMK, pmk, pmk_len);
2868 sm->pmk_len = pmk_len;
2876 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2877 sm->last_rx_eapol_key_len, NULL) == 0) {
2881 #endif /* CONFIG_FILS */
2883 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
2884 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
2889 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2890 "invalid MIC in msg 2/4 of 4-Way Handshake");
2892 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
2897 * Note: last_rx_eapol_key length fields have already been validated in
2900 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2901 key = (struct wpa_eapol_key *) (hdr + 1);
2902 mic = (u8 *) (key + 1);
2903 key_data = mic + mic_len + 2;
2904 key_data_length = WPA_GET_BE16(mic + mic_len);
2905 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2906 sizeof(*key) - mic_len - 2)
2909 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2910 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2911 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2915 eapol_key_ie = kde.rsn_ie;
2916 eapol_key_ie_len = kde.rsn_ie_len;
2917 } else if (kde.osen) {
2918 eapol_key_ie = kde.osen;
2919 eapol_key_ie_len = kde.osen_len;
2921 eapol_key_ie = kde.wpa_ie;
2922 eapol_key_ie_len = kde.wpa_ie_len;
2924 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2925 if (sm->wpa_ie == NULL ||
2926 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2927 eapol_key_ie, eapol_key_ie_len)) {
2928 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2929 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2931 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2932 sm->wpa_ie, sm->wpa_ie_len);
2934 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2935 eapol_key_ie, eapol_key_ie_len);
2936 /* MLME-DEAUTHENTICATE.request */
2937 wpa_sta_disconnect(wpa_auth, sm->addr,
2938 WLAN_REASON_PREV_AUTH_NOT_VALID);
2942 if (wpa_auth_uses_ocv(sm)) {
2943 struct wpa_channel_info ci;
2947 if (wpa_channel_info(wpa_auth, &ci) != 0) {
2948 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2949 "Failed to get channel info to validate received OCI in EAPOL-Key 2/4");
2953 if (get_sta_tx_parameters(sm,
2954 channel_width_to_int(ci.chanwidth),
2955 ci.seg1_idx, &tx_chanwidth,
2959 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
2960 tx_chanwidth, tx_seg1_idx) != 0) {
2961 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2966 #endif /* CONFIG_OCV */
2967 #ifdef CONFIG_IEEE80211R_AP
2968 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
2969 wpa_sta_disconnect(wpa_auth, sm->addr,
2970 WLAN_REASON_PREV_AUTH_NOT_VALID);
2973 #endif /* CONFIG_IEEE80211R_AP */
2975 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2976 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2978 wpa_printf(MSG_DEBUG,
2979 "P2P: IP address requested in EAPOL-Key exchange");
2980 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2982 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2983 bitfield_set(wpa_auth->ip_pool, idx);
2984 WPA_PUT_BE32(sm->ip_addr, start + idx);
2985 wpa_printf(MSG_DEBUG,
2986 "P2P: Assigned IP address %u.%u.%u.%u to "
2987 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2988 sm->ip_addr[2], sm->ip_addr[3],
2992 #endif /* CONFIG_P2P */
2994 #ifdef CONFIG_IEEE80211R_AP
2995 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2997 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2998 * with the value we derived.
3000 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
3001 WPA_PMK_NAME_LEN) != 0) {
3002 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3003 "PMKR1Name mismatch in FT 4-way "
3005 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
3007 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
3008 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
3009 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
3013 #endif /* CONFIG_IEEE80211R_AP */
3015 if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
3016 wpa_auth_update_vlan(wpa_auth, sm->addr, vlan_id) < 0) {
3017 wpa_sta_disconnect(wpa_auth, sm->addr,
3018 WLAN_REASON_PREV_AUTH_NOT_VALID);
3022 sm->pending_1_of_4_timeout = 0;
3023 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
3025 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
3026 /* PSK may have changed from the previous choice, so update
3027 * state machine data based on whatever PSK was selected here.
3029 os_memcpy(sm->PMK, pmk, PMK_LEN);
3030 sm->pmk_len = PMK_LEN;
3033 sm->MICVerified = TRUE;
3035 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
3036 forced_memzero(&PTK, sizeof(PTK));
3037 sm->PTK_valid = TRUE;
3041 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
3043 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
3048 #ifdef CONFIG_IEEE80211W
3050 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
3052 if (sm->mgmt_frame_prot) {
3054 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3055 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
3062 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
3064 struct wpa_igtk_kde igtk;
3065 struct wpa_group *gsm = sm->group;
3066 u8 rsc[WPA_KEY_RSC_LEN];
3067 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3069 if (!sm->mgmt_frame_prot)
3072 igtk.keyid[0] = gsm->GN_igtk;
3074 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
3075 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
3076 os_memset(igtk.pn, 0, sizeof(igtk.pn));
3078 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
3079 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
3080 if (sm->wpa_auth->conf.disable_gtk ||
3081 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
3083 * Provide unique random IGTK to each STA to prevent use of
3086 if (random_get_bytes(igtk.igtk, len) < 0)
3089 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
3090 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
3096 #else /* CONFIG_IEEE80211W */
3098 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
3104 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
3109 #endif /* CONFIG_IEEE80211W */
3112 static int ocv_oci_len(struct wpa_state_machine *sm)
3115 if (wpa_auth_uses_ocv(sm))
3116 return OCV_OCI_KDE_LEN;
3117 #endif /* CONFIG_OCV */
3121 static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos)
3124 struct wpa_channel_info ci;
3126 if (!wpa_auth_uses_ocv(sm))
3129 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3130 wpa_printf(MSG_WARNING,
3131 "Failed to get channel info for OCI element");
3135 return ocv_insert_oci_kde(&ci, argpos);
3136 #else /* CONFIG_OCV */
3138 #endif /* CONFIG_OCV */
3142 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
3144 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
3145 size_t gtk_len, kde_len;
3146 struct wpa_group *gsm = sm->group;
3148 int wpa_ie_len, secure, keyidx, encr = 0;
3150 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
3151 sm->TimeoutEvt = FALSE;
3154 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3155 sm->TimeoutCtr > 1) {
3156 /* Do not allow retransmission of EAPOL-Key msg 3/4 */
3159 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
3160 /* No point in sending the EAPOL-Key - we will disconnect
3161 * immediately following this. */
3165 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
3166 GTK[GN], IGTK, [FTIE], [TIE * 2])
3168 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3169 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3170 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
3171 wpa_ie = sm->wpa_auth->wpa_ie;
3172 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
3173 if (sm->wpa == WPA_VERSION_WPA &&
3174 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
3175 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
3176 /* WPA-only STA, remove RSN IE and possible MDIE */
3177 wpa_ie = wpa_ie + wpa_ie[1] + 2;
3178 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
3179 wpa_ie = wpa_ie + wpa_ie[1] + 2;
3180 wpa_ie_len = wpa_ie[1] + 2;
3182 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3183 "sending 3/4 msg of 4-Way Handshake");
3184 if (sm->wpa == WPA_VERSION_WPA2) {
3185 /* WPA2 send GTK in the 4-way handshake */
3187 gtk = gsm->GTK[gsm->GN - 1];
3188 gtk_len = gsm->GTK_len;
3189 if (sm->wpa_auth->conf.disable_gtk ||
3190 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
3192 * Provide unique random GTK to each STA to prevent use
3193 * of GTK in the BSS.
3195 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
3203 /* WPA does not include GTK in msg 3/4 */
3209 if (sm->rx_eapol_key_secure) {
3211 * It looks like Windows 7 supplicant tries to use
3212 * Secure bit in msg 2/4 after having reported Michael
3213 * MIC failure and it then rejects the 4-way handshake
3214 * if msg 3/4 does not set Secure bit. Work around this
3215 * by setting the Secure bit here even in the case of
3216 * WPA if the supplicant used it first.
3218 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3219 "STA used Secure bit in WPA msg 2/4 - "
3220 "set Secure for 3/4 as workaround");
3225 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
3227 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
3228 #ifdef CONFIG_IEEE80211R_AP
3229 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3230 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
3231 kde_len += 300; /* FTIE + 2 * TIE */
3233 #endif /* CONFIG_IEEE80211R_AP */
3235 if (WPA_GET_BE32(sm->ip_addr) > 0)
3236 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
3237 #endif /* CONFIG_P2P */
3238 kde = os_malloc(kde_len);
3243 os_memcpy(pos, wpa_ie, wpa_ie_len);
3245 #ifdef CONFIG_IEEE80211R_AP
3246 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3251 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
3253 wpa_printf(MSG_ERROR, "FT: Failed to insert "
3254 "PMKR1Name into RSN IE in EAPOL-Key data");
3261 #endif /* CONFIG_IEEE80211R_AP */
3264 hdr[0] = keyidx & 0x03;
3266 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3269 pos = ieee80211w_kde_add(sm, pos);
3270 if (ocv_oci_add(sm, &pos) < 0) {
3275 #ifdef CONFIG_IEEE80211R_AP
3276 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3278 struct wpa_auth_config *conf;
3280 conf = &sm->wpa_auth->conf;
3281 if (sm->assoc_resp_ftie &&
3282 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
3283 os_memcpy(pos, sm->assoc_resp_ftie,
3284 2 + sm->assoc_resp_ftie[1]);
3285 res = 2 + sm->assoc_resp_ftie[1];
3287 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3289 res = wpa_write_ftie(conf, use_sha384,
3290 conf->r0_key_holder,
3291 conf->r0_key_holder_len,
3293 kde + kde_len - pos,
3297 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3298 "into EAPOL-Key Key Data");
3304 /* TIE[ReassociationDeadline] (TU) */
3305 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3307 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3308 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3311 /* TIE[KeyLifetime] (seconds) */
3312 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3314 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
3315 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
3318 #endif /* CONFIG_IEEE80211R_AP */
3320 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3322 os_memcpy(addr, sm->ip_addr, 4);
3323 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3324 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3325 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3326 addr, sizeof(addr), NULL, 0);
3328 #endif /* CONFIG_P2P */
3330 wpa_send_eapol(sm->wpa_auth, sm,
3331 (secure ? WPA_KEY_INFO_SECURE : 0) |
3332 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3333 WPA_KEY_INFO_MIC : 0) |
3334 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3335 WPA_KEY_INFO_KEY_TYPE,
3336 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3341 SM_STATE(WPA_PTK, PTKINITDONE)
3343 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3344 sm->EAPOLKeyReceived = FALSE;
3346 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3347 int klen = wpa_cipher_key_len(sm->pairwise);
3348 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
3349 sm->PTK.tk, klen)) {
3350 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3351 WLAN_REASON_PREV_AUTH_NOT_VALID);
3354 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3355 sm->pairwise_set = TRUE;
3357 wpa_auth_set_ptk_rekey_timer(sm);
3359 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3360 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
3361 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
3362 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3363 WPA_EAPOL_authorized, 1);
3367 if (0 /* IBSS == TRUE */) {
3369 if (sm->keycount == 2) {
3370 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3371 WPA_EAPOL_portValid, 1);
3374 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3377 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3378 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3379 if (sm->wpa == WPA_VERSION_WPA)
3380 sm->PInitAKeys = TRUE;
3383 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3384 "pairwise key handshake completed (%s)",
3385 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3387 #ifdef CONFIG_IEEE80211R_AP
3388 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
3389 #endif /* CONFIG_IEEE80211R_AP */
3395 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3398 SM_ENTER(WPA_PTK, INITIALIZE);
3399 else if (sm->Disconnect
3400 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3401 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3402 "WPA_PTK: sm->Disconnect");
3403 SM_ENTER(WPA_PTK, DISCONNECT);
3405 else if (sm->DeauthenticationRequest)
3406 SM_ENTER(WPA_PTK, DISCONNECTED);
3407 else if (sm->AuthenticationRequest)
3408 SM_ENTER(WPA_PTK, AUTHENTICATION);
3409 else if (sm->ReAuthenticationRequest)
3410 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3411 else if (sm->PTKRequest) {
3412 if (wpa_auth_sm_ptk_update(sm) < 0)
3413 SM_ENTER(WPA_PTK, DISCONNECTED);
3415 SM_ENTER(WPA_PTK, PTKSTART);
3416 } else switch (sm->wpa_ptk_state) {
3417 case WPA_PTK_INITIALIZE:
3419 case WPA_PTK_DISCONNECT:
3420 SM_ENTER(WPA_PTK, DISCONNECTED);
3422 case WPA_PTK_DISCONNECTED:
3423 SM_ENTER(WPA_PTK, INITIALIZE);
3425 case WPA_PTK_AUTHENTICATION:
3426 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3428 case WPA_PTK_AUTHENTICATION2:
3429 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
3430 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3431 WPA_EAPOL_keyRun) > 0)
3432 SM_ENTER(WPA_PTK, INITPMK);
3433 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3434 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
3435 /* FIX: && 802.1X::keyRun */)
3436 SM_ENTER(WPA_PTK, INITPSK);
3437 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3438 SM_ENTER(WPA_PTK, INITPMK);
3440 case WPA_PTK_INITPMK:
3441 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3442 WPA_EAPOL_keyAvailable) > 0) {
3443 SM_ENTER(WPA_PTK, PTKSTART);
3445 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3446 SM_ENTER(WPA_PTK, PTKSTART);
3447 #endif /* CONFIG_DPP */
3449 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3450 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3451 "INITPMK - keyAvailable = false");
3452 SM_ENTER(WPA_PTK, DISCONNECT);
3455 case WPA_PTK_INITPSK:
3456 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
3457 NULL, NULL, NULL)) {
3458 SM_ENTER(WPA_PTK, PTKSTART);
3460 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3461 SM_ENTER(WPA_PTK, PTKSTART);
3462 #endif /* CONFIG_SAE */
3464 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3465 "no PSK configured for the STA");
3466 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3467 SM_ENTER(WPA_PTK, DISCONNECT);
3470 case WPA_PTK_PTKSTART:
3471 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3472 sm->EAPOLKeyPairwise)
3473 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3474 else if (sm->TimeoutCtr >
3475 sm->wpa_auth->conf.wpa_pairwise_update_count) {
3476 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3478 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3479 "PTKSTART: Retry limit %u reached",
3480 sm->wpa_auth->conf.wpa_pairwise_update_count);
3481 SM_ENTER(WPA_PTK, DISCONNECT);
3482 } else if (sm->TimeoutEvt)
3483 SM_ENTER(WPA_PTK, PTKSTART);
3485 case WPA_PTK_PTKCALCNEGOTIATING:
3486 if (sm->MICVerified)
3487 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3488 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3489 sm->EAPOLKeyPairwise)
3490 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3491 else if (sm->TimeoutEvt)
3492 SM_ENTER(WPA_PTK, PTKSTART);
3494 case WPA_PTK_PTKCALCNEGOTIATING2:
3495 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3497 case WPA_PTK_PTKINITNEGOTIATING:
3498 if (sm->update_snonce)
3499 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3500 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3501 sm->EAPOLKeyPairwise && sm->MICVerified)
3502 SM_ENTER(WPA_PTK, PTKINITDONE);
3503 else if (sm->TimeoutCtr >
3504 sm->wpa_auth->conf.wpa_pairwise_update_count ||
3505 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3506 sm->TimeoutCtr > 1)) {
3507 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3509 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3510 "PTKINITNEGOTIATING: Retry limit %u reached",
3511 sm->wpa_auth->conf.wpa_pairwise_update_count);
3512 SM_ENTER(WPA_PTK, DISCONNECT);
3513 } else if (sm->TimeoutEvt)
3514 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3516 case WPA_PTK_PTKINITDONE:
3522 SM_STATE(WPA_PTK_GROUP, IDLE)
3524 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3526 /* Init flag is not cleared here, so avoid busy
3527 * loop by claiming nothing changed. */
3528 sm->changed = FALSE;
3530 sm->GTimeoutCtr = 0;
3534 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3536 u8 rsc[WPA_KEY_RSC_LEN];
3537 struct wpa_group *gsm = sm->group;
3539 u8 *kde_buf = NULL, *pos, hdr[2];
3541 u8 *gtk, dummy_gtk[32];
3543 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
3546 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3547 sm->GTimeoutCtr > 1) {
3548 /* Do not allow retransmission of EAPOL-Key group msg 1/2 */
3551 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
3552 /* No point in sending the EAPOL-Key - we will disconnect
3553 * immediately following this. */
3557 if (sm->wpa == WPA_VERSION_WPA)
3558 sm->PInitAKeys = FALSE;
3559 sm->TimeoutEvt = FALSE;
3560 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3561 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3562 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3563 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3564 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3565 "sending 1/2 msg of Group Key Handshake");
3567 gtk = gsm->GTK[gsm->GN - 1];
3568 if (sm->wpa_auth->conf.disable_gtk ||
3569 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
3571 * Provide unique random GTK to each STA to prevent use
3572 * of GTK in the BSS.
3574 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3578 if (sm->wpa == WPA_VERSION_WPA2) {
3579 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3580 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
3581 kde_buf = os_malloc(kde_len);
3582 if (kde_buf == NULL)
3585 kde = pos = kde_buf;
3586 hdr[0] = gsm->GN & 0x03;
3588 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3590 pos = ieee80211w_kde_add(sm, pos);
3591 if (ocv_oci_add(sm, &pos) < 0) {
3595 kde_len = pos - kde;
3598 kde_len = gsm->GTK_len;
3601 wpa_send_eapol(sm->wpa_auth, sm,
3602 WPA_KEY_INFO_SECURE |
3603 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3604 WPA_KEY_INFO_MIC : 0) |
3606 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
3607 rsc, NULL, kde, kde_len, gsm->GN, 1);
3613 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3616 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3617 const u8 *key_data, *mic;
3618 struct ieee802_1x_hdr *hdr;
3619 struct wpa_eapol_key *key;
3620 struct wpa_eapol_ie_parse kde;
3622 u16 key_data_length;
3623 #endif /* CONFIG_OCV */
3625 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3626 sm->EAPOLKeyReceived = FALSE;
3629 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3632 * Note: last_rx_eapol_key length fields have already been validated in
3635 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
3636 key = (struct wpa_eapol_key *) (hdr + 1);
3637 mic = (u8 *) (key + 1);
3638 key_data = mic + mic_len + 2;
3639 key_data_length = WPA_GET_BE16(mic + mic_len);
3640 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
3641 sizeof(*key) - mic_len - 2)
3644 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
3645 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
3646 "received EAPOL-Key group msg 2/2 with invalid Key Data contents");
3650 if (wpa_auth_uses_ocv(sm)) {
3651 struct wpa_channel_info ci;
3655 if (wpa_channel_info(wpa_auth, &ci) != 0) {
3656 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3657 "Failed to get channel info to validate received OCI in EAPOL-Key group 1/2");
3661 if (get_sta_tx_parameters(sm,
3662 channel_width_to_int(ci.chanwidth),
3663 ci.seg1_idx, &tx_chanwidth,
3667 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
3668 tx_chanwidth, tx_seg1_idx) != 0) {
3669 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3674 #endif /* CONFIG_OCV */
3676 if (sm->GUpdateStationKeys)
3677 sm->group->GKeyDoneStations--;
3678 sm->GUpdateStationKeys = FALSE;
3679 sm->GTimeoutCtr = 0;
3680 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3681 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3682 "group key handshake completed (%s)",
3683 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3688 SM_STATE(WPA_PTK_GROUP, KEYERROR)
3690 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3691 if (sm->GUpdateStationKeys)
3692 sm->group->GKeyDoneStations--;
3693 sm->GUpdateStationKeys = FALSE;
3694 sm->Disconnect = TRUE;
3695 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3696 "group key handshake failed (%s) after %u tries",
3697 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3698 sm->wpa_auth->conf.wpa_group_update_count);
3702 SM_STEP(WPA_PTK_GROUP)
3704 if (sm->Init || sm->PtkGroupInit) {
3705 SM_ENTER(WPA_PTK_GROUP, IDLE);
3706 sm->PtkGroupInit = FALSE;
3707 } else switch (sm->wpa_ptk_group_state) {
3708 case WPA_PTK_GROUP_IDLE:
3709 if (sm->GUpdateStationKeys ||
3710 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3711 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3713 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3714 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3715 !sm->EAPOLKeyPairwise && sm->MICVerified)
3716 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3717 else if (sm->GTimeoutCtr >
3718 sm->wpa_auth->conf.wpa_group_update_count ||
3719 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3720 sm->GTimeoutCtr > 1))
3721 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3722 else if (sm->TimeoutEvt)
3723 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3725 case WPA_PTK_GROUP_KEYERROR:
3726 SM_ENTER(WPA_PTK_GROUP, IDLE);
3728 case WPA_PTK_GROUP_REKEYESTABLISHED:
3729 SM_ENTER(WPA_PTK_GROUP, IDLE);
3735 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3736 struct wpa_group *group)
3740 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3741 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3742 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3743 wpa_auth->addr, group->GNonce,
3744 group->GTK[group->GN - 1], group->GTK_len) < 0)
3746 wpa_hexdump_key(MSG_DEBUG, "GTK",
3747 group->GTK[group->GN - 1], group->GTK_len);
3749 #ifdef CONFIG_IEEE80211W
3750 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3752 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3753 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3754 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3755 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3756 wpa_auth->addr, group->GNonce,
3757 group->IGTK[group->GN_igtk - 4], len) < 0)
3759 wpa_hexdump_key(MSG_DEBUG, "IGTK",
3760 group->IGTK[group->GN_igtk - 4], len);
3762 #endif /* CONFIG_IEEE80211W */
3768 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3769 struct wpa_group *group)
3771 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3772 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3773 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3774 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3777 os_memset(group->GTK, 0, sizeof(group->GTK));
3780 #ifdef CONFIG_IEEE80211W
3783 #endif /* CONFIG_IEEE80211W */
3784 /* GTK[GN] = CalcGTK() */
3785 wpa_gtk_update(wpa_auth, group);
3789 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3791 if (ctx != NULL && ctx != sm->group)
3794 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3795 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3796 "Not in PTKINITDONE; skip Group Key update");
3797 sm->GUpdateStationKeys = FALSE;
3800 if (sm->GUpdateStationKeys) {
3802 * This should not really happen, so add a debug log entry.
3803 * Since we clear the GKeyDoneStations before the loop, the
3804 * station needs to be counted here anyway.
3806 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3807 "GUpdateStationKeys was already set when "
3808 "marking station for GTK rekeying");
3811 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
3812 if (sm->is_wnmsleep)
3815 sm->group->GKeyDoneStations++;
3816 sm->GUpdateStationKeys = TRUE;
3823 #ifdef CONFIG_WNM_AP
3824 /* update GTK when exiting WNM-Sleep Mode */
3825 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3827 if (sm == NULL || sm->is_wnmsleep)
3830 wpa_group_update_sta(sm, NULL);
3834 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3837 sm->is_wnmsleep = !!flag;
3841 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3843 struct wpa_group *gsm = sm->group;
3848 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
3851 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3852 *pos++ = 11 + gsm->GTK_len;
3853 /* Key ID in B0-B1 of Key Info */
3854 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3856 *pos++ = gsm->GTK_len;
3857 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
3860 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3861 pos += gsm->GTK_len;
3863 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3865 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
3866 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3872 #ifdef CONFIG_IEEE80211W
3873 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3875 struct wpa_group *gsm = sm->group;
3877 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3881 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3883 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
3884 *pos++ = 2 + 6 + len;
3885 WPA_PUT_LE16(pos, gsm->GN_igtk);
3887 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
3891 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3894 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3896 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
3897 gsm->IGTK[gsm->GN_igtk - 4], len);
3901 #endif /* CONFIG_IEEE80211W */
3902 #endif /* CONFIG_WNM_AP */
3905 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3906 struct wpa_group *group)
3910 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3911 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3912 group->changed = TRUE;
3913 group->wpa_group_state = WPA_GROUP_SETKEYS;
3914 group->GTKReKey = FALSE;
3916 group->GM = group->GN;
3918 #ifdef CONFIG_IEEE80211W
3919 tmp = group->GM_igtk;
3920 group->GM_igtk = group->GN_igtk;
3921 group->GN_igtk = tmp;
3922 #endif /* CONFIG_IEEE80211W */
3923 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3924 * counting the STAs that are marked with GUpdateStationKeys instead of
3925 * including all STAs that could be in not-yet-completed state. */
3926 wpa_gtk_update(wpa_auth, group);
3928 if (group->GKeyDoneStations) {
3929 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3930 "GKeyDoneStations=%d when starting new GTK rekey",
3931 group->GKeyDoneStations);
3932 group->GKeyDoneStations = 0;
3934 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
3935 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3936 group->GKeyDoneStations);
3940 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3941 struct wpa_group *group)
3945 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
3946 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
3947 broadcast_ether_addr, group->GN,
3948 group->GTK[group->GN - 1], group->GTK_len) < 0)
3951 #ifdef CONFIG_IEEE80211W
3952 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3956 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3957 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3960 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3961 broadcast_ether_addr, group->GN_igtk,
3962 group->IGTK[group->GN_igtk - 4], len) < 0)
3965 #endif /* CONFIG_IEEE80211W */
3971 static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3973 if (sm->group == ctx) {
3974 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3975 " for discconnection due to fatal failure",
3977 sm->Disconnect = TRUE;
3984 static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3985 struct wpa_group *group)
3987 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3988 group->changed = TRUE;
3989 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3990 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3994 static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3995 struct wpa_group *group)
3997 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3998 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3999 group->changed = TRUE;
4000 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
4002 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
4003 wpa_group_fatal_failure(wpa_auth, group);
4011 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
4012 struct wpa_group *group)
4015 wpa_group_gtk_init(wpa_auth, group);
4016 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
4017 /* Do not allow group operations */
4018 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
4019 group->GTKAuthenticator) {
4020 wpa_group_setkeysdone(wpa_auth, group);
4021 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
4023 wpa_group_setkeys(wpa_auth, group);
4024 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
4025 if (group->GKeyDoneStations == 0)
4026 wpa_group_setkeysdone(wpa_auth, group);
4027 else if (group->GTKReKey)
4028 wpa_group_setkeys(wpa_auth, group);
4033 static int wpa_sm_step(struct wpa_state_machine *sm)
4038 if (sm->in_step_loop) {
4039 /* This should not happen, but if it does, make sure we do not
4040 * end up freeing the state machine too early by exiting the
4041 * recursive call. */
4042 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
4046 sm->in_step_loop = 1;
4048 if (sm->pending_deinit)
4051 sm->changed = FALSE;
4052 sm->wpa_auth->group->changed = FALSE;
4054 SM_STEP_RUN(WPA_PTK);
4055 if (sm->pending_deinit)
4057 SM_STEP_RUN(WPA_PTK_GROUP);
4058 if (sm->pending_deinit)
4060 wpa_group_sm_step(sm->wpa_auth, sm->group);
4061 } while (sm->changed || sm->wpa_auth->group->changed);
4062 sm->in_step_loop = 0;
4064 if (sm->pending_deinit) {
4065 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
4066 "machine deinit for " MACSTR, MAC2STR(sm->addr));
4067 wpa_free_sta_sm(sm);
4074 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
4076 struct wpa_state_machine *sm = eloop_ctx;
4081 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
4085 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
4089 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
4092 struct wpa_group *group;
4094 if (wpa_auth == NULL)
4097 group = wpa_auth->group;
4099 for (i = 0; i < 2; i++) {
4101 group->GM = group->GN;
4103 #ifdef CONFIG_IEEE80211W
4104 tmp = group->GM_igtk;
4105 group->GM_igtk = group->GN_igtk;
4106 group->GN_igtk = tmp;
4107 #endif /* CONFIG_IEEE80211W */
4108 wpa_gtk_update(wpa_auth, group);
4109 wpa_group_config_group_keys(wpa_auth, group);
4114 static const char * wpa_bool_txt(int val)
4116 return val ? "TRUE" : "FALSE";
4120 #define RSN_SUITE "%02x-%02x-%02x-%d"
4121 #define RSN_SUITE_ARG(s) \
4122 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
4124 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
4127 char pmkid_txt[PMKID_LEN * 2 + 1];
4128 #ifdef CONFIG_RSN_PREAUTH
4129 const int preauth = 1;
4130 #else /* CONFIG_RSN_PREAUTH */
4131 const int preauth = 0;
4132 #endif /* CONFIG_RSN_PREAUTH */
4134 if (wpa_auth == NULL)
4137 ret = os_snprintf(buf + len, buflen - len,
4138 "dot11RSNAOptionImplemented=TRUE\n"
4139 "dot11RSNAPreauthenticationImplemented=%s\n"
4140 "dot11RSNAEnabled=%s\n"
4141 "dot11RSNAPreauthenticationEnabled=%s\n",
4142 wpa_bool_txt(preauth),
4143 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
4144 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
4145 if (os_snprintf_error(buflen - len, ret))
4149 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
4150 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
4153 buf + len, buflen - len,
4154 "dot11RSNAConfigVersion=%u\n"
4155 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
4156 /* FIX: dot11RSNAConfigGroupCipher */
4157 /* FIX: dot11RSNAConfigGroupRekeyMethod */
4158 /* FIX: dot11RSNAConfigGroupRekeyTime */
4159 /* FIX: dot11RSNAConfigGroupRekeyPackets */
4160 "dot11RSNAConfigGroupRekeyStrict=%u\n"
4161 "dot11RSNAConfigGroupUpdateCount=%u\n"
4162 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
4163 "dot11RSNAConfigGroupCipherSize=%u\n"
4164 "dot11RSNAConfigPMKLifetime=%u\n"
4165 "dot11RSNAConfigPMKReauthThreshold=%u\n"
4166 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
4167 "dot11RSNAConfigSATimeout=%u\n"
4168 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
4169 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
4170 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
4171 "dot11RSNAPMKIDUsed=%s\n"
4172 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
4173 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
4174 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
4175 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
4176 "dot11RSNA4WayHandshakeFailures=%u\n"
4177 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
4179 !!wpa_auth->conf.wpa_strict_rekey,
4180 wpa_auth->conf.wpa_group_update_count,
4181 wpa_auth->conf.wpa_pairwise_update_count,
4182 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
4183 dot11RSNAConfigPMKLifetime,
4184 dot11RSNAConfigPMKReauthThreshold,
4185 dot11RSNAConfigSATimeout,
4186 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
4187 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
4188 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
4190 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
4191 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
4192 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
4193 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
4194 wpa_auth->dot11RSNA4WayHandshakeFailures);
4195 if (os_snprintf_error(buflen - len, ret))
4199 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
4200 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
4203 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
4204 wpa_auth->group->wpa_group_state);
4205 if (os_snprintf_error(buflen - len, ret))
4213 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
4221 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
4223 /* dot11RSNAStatsEntry */
4225 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
4226 WPA_PROTO_RSN : WPA_PROTO_WPA,
4232 buf + len, buflen - len,
4233 /* TODO: dot11RSNAStatsIndex */
4234 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
4235 "dot11RSNAStatsVersion=1\n"
4236 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
4237 /* TODO: dot11RSNAStatsTKIPICVErrors */
4238 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
4239 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
4240 /* TODO: dot11RSNAStatsCCMPReplays */
4241 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
4242 /* TODO: dot11RSNAStatsTKIPReplays */,
4244 RSN_SUITE_ARG(pairwise),
4245 sm->dot11RSNAStatsTKIPLocalMICFailures,
4246 sm->dot11RSNAStatsTKIPRemoteMICFailures);
4247 if (os_snprintf_error(buflen - len, ret))
4252 ret = os_snprintf(buf + len, buflen - len,
4254 "AKMSuiteSelector=" RSN_SUITE "\n"
4255 "hostapdWPAPTKState=%d\n"
4256 "hostapdWPAPTKGroupState=%d\n",
4258 RSN_SUITE_ARG(wpa_akm_to_suite(sm->wpa_key_mgmt)),
4260 sm->wpa_ptk_group_state);
4261 if (os_snprintf_error(buflen - len, ret))
4269 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
4272 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
4276 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
4278 return sm && sm->pairwise_set;
4282 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
4284 return sm->pairwise;
4288 const u8 * wpa_auth_get_pmk(struct wpa_state_machine *sm, int *len)
4297 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
4301 return sm->wpa_key_mgmt;
4305 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
4313 int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
4315 if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
4317 return sm->tk_already_set;
4321 int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm)
4323 if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt))
4325 return sm->tk_already_set;
4329 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
4330 struct rsn_pmksa_cache_entry *entry)
4332 if (sm == NULL || sm->pmksa != entry)
4339 struct rsn_pmksa_cache_entry *
4340 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
4342 return sm ? sm->pmksa : NULL;
4346 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
4349 sm->dot11RSNAStatsTKIPLocalMICFailures++;
4353 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
4355 if (wpa_auth == NULL)
4357 *len = wpa_auth->wpa_ie_len;
4358 return wpa_auth->wpa_ie;
4362 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
4363 unsigned int pmk_len,
4364 int session_timeout, struct eapol_state_machine *eapol)
4366 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
4367 sm->wpa_auth->conf.disable_pmksa_caching)
4370 #ifdef CONFIG_IEEE80211R_AP
4371 if (pmk_len >= 2 * PMK_LEN && wpa_key_mgmt_ft(sm->wpa_key_mgmt) &&
4372 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
4373 !wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
4374 /* Cache MPMK/XXKey instead of initial part from MSK */
4375 pmk = pmk + PMK_LEN;
4378 #endif /* CONFIG_IEEE80211R_AP */
4379 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
4380 if (pmk_len > PMK_LEN_SUITE_B_192)
4381 pmk_len = PMK_LEN_SUITE_B_192;
4382 } else if (pmk_len > PMK_LEN) {
4386 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK", pmk, pmk_len);
4387 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
4388 sm->PTK.kck, sm->PTK.kck_len,
4389 sm->wpa_auth->addr, sm->addr, session_timeout,
4390 eapol, sm->wpa_key_mgmt))
4397 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4398 const u8 *pmk, size_t len, const u8 *sta_addr,
4399 int session_timeout,
4400 struct eapol_state_machine *eapol)
4402 if (wpa_auth == NULL)
4405 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from preauth", pmk, len);
4406 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
4409 sta_addr, session_timeout, eapol,
4410 WPA_KEY_MGMT_IEEE8021X))
4417 int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
4418 const u8 *pmk, const u8 *pmkid)
4420 if (wpa_auth->conf.disable_pmksa_caching)
4423 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from SAE", pmk, PMK_LEN);
4424 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
4426 wpa_auth->addr, addr, 0, NULL,
4434 void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid)
4436 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4441 int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4442 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4443 int session_timeout, int akmp)
4445 if (wpa_auth->conf.disable_pmksa_caching)
4448 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK (2)", pmk, PMK_LEN);
4449 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4450 NULL, 0, wpa_auth->addr, addr, session_timeout,
4458 void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4461 struct rsn_pmksa_cache_entry *pmksa;
4463 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4465 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4467 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4468 MACSTR " based on request", MAC2STR(sta_addr));
4469 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4474 int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4477 if (!wpa_auth || !wpa_auth->pmksa)
4479 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4483 void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4485 if (wpa_auth && wpa_auth->pmksa)
4486 pmksa_cache_auth_flush(wpa_auth->pmksa);
4490 #ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4493 int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4494 char *buf, size_t len)
4496 if (!wpa_auth || !wpa_auth->pmksa)
4499 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4503 struct rsn_pmksa_cache_entry *
4504 wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4505 const u8 *pmkid, int expiration)
4507 struct rsn_pmksa_cache_entry *entry;
4508 struct os_reltime now;
4510 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4511 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4515 os_get_reltime(&now);
4516 entry->expiration = now.sec + expiration;
4521 int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4522 struct rsn_pmksa_cache_entry *entry)
4526 if (!wpa_auth || !wpa_auth->pmksa)
4529 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4531 wpa_printf(MSG_DEBUG,
4532 "RSN: Failed to store external PMKSA cache for "
4533 MACSTR, MAC2STR(entry->spa));
4538 #endif /* CONFIG_MESH */
4539 #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4542 struct rsn_pmksa_cache_entry *
4543 wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4546 if (!wpa_auth || !wpa_auth->pmksa)
4548 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
4552 void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4553 struct wpa_state_machine *sm,
4554 struct wpa_authenticator *wpa_auth,
4561 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4562 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4563 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
4568 * Remove and free the group from wpa_authenticator. This is triggered by a
4569 * callback to make sure nobody is currently iterating the group list while it
4572 static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4573 struct wpa_group *group)
4575 struct wpa_group *prev = wpa_auth->group;
4577 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4581 if (prev->next == group) {
4582 /* This never frees the special first group as needed */
4583 prev->next = group->next;
4593 /* Increase the reference counter for group */
4594 static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4595 struct wpa_group *group)
4597 /* Skip the special first group */
4598 if (wpa_auth->group == group)
4601 group->references++;
4605 /* Decrease the reference counter and maybe free the group */
4606 static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4607 struct wpa_group *group)
4609 /* Skip the special first group */
4610 if (wpa_auth->group == group)
4613 group->references--;
4614 if (group->references)
4616 wpa_group_free(wpa_auth, group);
4621 * Add a group that has its references counter set to zero. Caller needs to
4622 * call wpa_group_get() on the return value to mark the entry in use.
4624 static struct wpa_group *
4625 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4627 struct wpa_group *group;
4629 if (wpa_auth == NULL || wpa_auth->group == NULL)
4632 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4634 group = wpa_group_init(wpa_auth, vlan_id, 0);
4638 group->next = wpa_auth->group->next;
4639 wpa_auth->group->next = group;
4646 * Enforce that the group state machine for the VLAN is running, increase
4647 * reference counter as interface is up. References might have been increased
4648 * even if a negative value is returned.
4649 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4651 int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4653 struct wpa_group *group;
4655 if (wpa_auth == NULL)
4658 group = wpa_auth->group;
4660 if (group->vlan_id == vlan_id)
4662 group = group->next;
4665 if (group == NULL) {
4666 group = wpa_auth_add_group(wpa_auth, vlan_id);
4671 wpa_printf(MSG_DEBUG,
4672 "WPA: Ensure group state machine running for VLAN ID %d",
4675 wpa_group_get(wpa_auth, group);
4676 group->num_setup_iface++;
4678 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4686 * Decrease reference counter, expected to be zero afterwards.
4687 * returns: -1 on error (group not found, group in fail state)
4688 * -2 if wpa_group is still referenced
4691 int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4693 struct wpa_group *group;
4696 if (wpa_auth == NULL)
4699 group = wpa_auth->group;
4701 if (group->vlan_id == vlan_id)
4703 group = group->next;
4709 wpa_printf(MSG_DEBUG,
4710 "WPA: Try stopping group state machine for VLAN ID %d",
4713 if (group->num_setup_iface <= 0) {
4714 wpa_printf(MSG_ERROR,
4715 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4719 group->num_setup_iface--;
4721 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4724 if (group->references > 1) {
4725 wpa_printf(MSG_DEBUG,
4726 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4731 wpa_group_put(wpa_auth, group);
4737 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4739 struct wpa_group *group;
4741 if (sm == NULL || sm->wpa_auth == NULL)
4744 group = sm->wpa_auth->group;
4746 if (group->vlan_id == vlan_id)
4748 group = group->next;
4751 if (group == NULL) {
4752 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4757 if (sm->group == group)
4760 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4763 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4764 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4766 wpa_group_get(sm->wpa_auth, group);
4767 wpa_group_put(sm->wpa_auth, sm->group);
4774 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4775 struct wpa_state_machine *sm, int ack)
4777 if (wpa_auth == NULL || sm == NULL)
4779 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4780 " ack=%d", MAC2STR(sm->addr), ack);
4781 if (sm->pending_1_of_4_timeout && ack) {
4783 * Some deployed supplicant implementations update their SNonce
4784 * for each EAPOL-Key 2/4 message even within the same 4-way
4785 * handshake and then fail to use the first SNonce when
4786 * deriving the PTK. This results in unsuccessful 4-way
4787 * handshake whenever the relatively short initial timeout is
4788 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4789 * around this by increasing the timeout now that we know that
4790 * the station has received the frame.
4792 int timeout_ms = eapol_key_timeout_subseq;
4793 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4794 "timeout by %u ms because of acknowledged frame",
4796 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4797 eloop_register_timeout(timeout_ms / 1000,
4798 (timeout_ms % 1000) * 1000,
4799 wpa_send_eapol_timeout, wpa_auth, sm);
4802 #ifdef CONFIG_TESTING_OPTIONS
4803 if (sm->eapol_status_cb) {
4804 sm->eapol_status_cb(sm->eapol_status_cb_ctx1,
4805 sm->eapol_status_cb_ctx2);
4806 sm->eapol_status_cb = NULL;
4808 #endif /* CONFIG_TESTING_OPTIONS */
4812 int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4816 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4820 int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4824 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4829 int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4831 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4833 os_memcpy(addr, sm->ip_addr, 4);
4836 #endif /* CONFIG_P2P */
4839 int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4840 struct radius_das_attrs *attr)
4842 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4846 void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4848 struct wpa_group *group;
4852 for (group = wpa_auth->group; group; group = group->next)
4853 wpa_group_config_group_keys(wpa_auth, group);
4859 struct wpa_auth_fils_iter_data {
4860 struct wpa_authenticator *auth;
4862 struct rsn_pmksa_cache_entry *pmksa;
4868 static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4870 struct wpa_auth_fils_iter_data *data = ctx;
4872 if (a == data->auth || !a->conf.fils_cache_id_set ||
4873 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4874 FILS_CACHE_ID_LEN) != 0)
4876 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4877 return data->pmksa != NULL;
4881 struct rsn_pmksa_cache_entry *
4882 wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4883 const u8 *sta_addr, const u8 *pmkid)
4885 struct wpa_auth_fils_iter_data idata;
4887 if (!wpa_auth->conf.fils_cache_id_set)
4889 idata.auth = wpa_auth;
4890 idata.cache_id = wpa_auth->conf.fils_cache_id;
4892 idata.spa = sta_addr;
4893 idata.pmkid = pmkid;
4894 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4899 #ifdef CONFIG_IEEE80211R_AP
4900 int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384,
4901 u8 *buf, size_t len)
4903 struct wpa_auth_config *conf = &wpa_auth->conf;
4905 return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder,
4906 conf->r0_key_holder_len,
4907 NULL, NULL, buf, len, NULL, 0);
4909 #endif /* CONFIG_IEEE80211R_AP */
4912 void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4913 u8 *fils_anonce, u8 *fils_snonce,
4914 u8 *fils_kek, size_t *fils_kek_len)
4916 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4917 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4918 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4919 *fils_kek_len = sm->PTK.kek_len;
4923 void wpa_auth_add_fils_pmk_pmkid(struct wpa_state_machine *sm, const u8 *pmk,
4924 size_t pmk_len, const u8 *pmkid)
4926 os_memcpy(sm->PMK, pmk, pmk_len);
4927 sm->pmk_len = pmk_len;
4928 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4932 #endif /* CONFIG_FILS */
4935 void wpa_auth_set_auth_alg(struct wpa_state_machine *sm, u16 auth_alg)
4938 sm->auth_alg = auth_alg;
4943 void wpa_auth_set_dpp_z(struct wpa_state_machine *sm, const struct wpabuf *z)
4946 wpabuf_clear_free(sm->dpp_z);
4947 sm->dpp_z = z ? wpabuf_dup(z) : NULL;
4950 #endif /* CONFIG_DPP2 */
4953 #ifdef CONFIG_TESTING_OPTIONS
4955 int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce,
4956 void (*cb)(void *ctx1, void *ctx2),
4957 void *ctx1, void *ctx2)
4959 const u8 *anonce = sm->ANonce;
4960 u8 anonce_buf[WPA_NONCE_LEN];
4962 if (change_anonce) {
4963 if (random_get_bytes(anonce_buf, WPA_NONCE_LEN))
4965 anonce = anonce_buf;
4968 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4969 "sending 1/4 msg of 4-Way Handshake (TESTING)");
4970 wpa_send_eapol(sm->wpa_auth, sm,
4971 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
4972 anonce, NULL, 0, 0, 0);
4977 int wpa_auth_resend_m3(struct wpa_state_machine *sm,
4978 void (*cb)(void *ctx1, void *ctx2),
4979 void *ctx1, void *ctx2)
4981 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
4982 #ifdef CONFIG_IEEE80211W
4984 #endif /* CONFIG_IEEE80211W */
4985 size_t gtk_len, kde_len;
4986 struct wpa_group *gsm = sm->group;
4988 int wpa_ie_len, secure, keyidx, encr = 0;
4990 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
4991 GTK[GN], IGTK, [FTIE], [TIE * 2])
4995 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4996 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
4997 wpa_ie = sm->wpa_auth->wpa_ie;
4998 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
4999 if (sm->wpa == WPA_VERSION_WPA &&
5000 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
5001 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
5002 /* WPA-only STA, remove RSN IE and possible MDIE */
5003 wpa_ie = wpa_ie + wpa_ie[1] + 2;
5004 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
5005 wpa_ie = wpa_ie + wpa_ie[1] + 2;
5006 wpa_ie_len = wpa_ie[1] + 2;
5008 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5009 "sending 3/4 msg of 4-Way Handshake (TESTING)");
5010 if (sm->wpa == WPA_VERSION_WPA2) {
5011 /* WPA2 send GTK in the 4-way handshake */
5013 gtk = gsm->GTK[gsm->GN - 1];
5014 gtk_len = gsm->GTK_len;
5019 /* WPA does not include GTK in msg 3/4 */
5025 if (sm->rx_eapol_key_secure) {
5027 * It looks like Windows 7 supplicant tries to use
5028 * Secure bit in msg 2/4 after having reported Michael
5029 * MIC failure and it then rejects the 4-way handshake
5030 * if msg 3/4 does not set Secure bit. Work around this
5031 * by setting the Secure bit here even in the case of
5032 * WPA if the supplicant used it first.
5034 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5035 "STA used Secure bit in WPA msg 2/4 - "
5036 "set Secure for 3/4 as workaround");
5041 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
5043 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
5044 #ifdef CONFIG_IEEE80211R_AP
5045 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5046 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
5047 kde_len += 300; /* FTIE + 2 * TIE */
5049 #endif /* CONFIG_IEEE80211R_AP */
5050 kde = os_malloc(kde_len);
5055 os_memcpy(pos, wpa_ie, wpa_ie_len);
5057 #ifdef CONFIG_IEEE80211R_AP
5058 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5063 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
5065 wpa_printf(MSG_ERROR, "FT: Failed to insert "
5066 "PMKR1Name into RSN IE in EAPOL-Key data");
5073 #endif /* CONFIG_IEEE80211R_AP */
5076 hdr[0] = keyidx & 0x03;
5078 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5081 #ifdef CONFIG_IEEE80211W
5083 pos = ieee80211w_kde_add(sm, pos);
5084 if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5085 /* skip KDE header and keyid */
5086 opos += 2 + RSN_SELECTOR_LEN + 2;
5087 os_memset(opos, 0, 6); /* clear PN */
5089 #endif /* CONFIG_IEEE80211W */
5090 if (ocv_oci_add(sm, &pos) < 0) {
5095 #ifdef CONFIG_IEEE80211R_AP
5096 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5098 struct wpa_auth_config *conf;
5100 conf = &sm->wpa_auth->conf;
5101 if (sm->assoc_resp_ftie &&
5102 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
5103 os_memcpy(pos, sm->assoc_resp_ftie,
5104 2 + sm->assoc_resp_ftie[1]);
5105 res = 2 + sm->assoc_resp_ftie[1];
5107 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
5109 res = wpa_write_ftie(conf, use_sha384,
5110 conf->r0_key_holder,
5111 conf->r0_key_holder_len,
5113 kde + kde_len - pos,
5117 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
5118 "into EAPOL-Key Key Data");
5124 /* TIE[ReassociationDeadline] (TU) */
5125 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5127 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
5128 WPA_PUT_LE32(pos, conf->reassociation_deadline);
5131 /* TIE[KeyLifetime] (seconds) */
5132 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5134 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
5135 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
5138 #endif /* CONFIG_IEEE80211R_AP */
5140 wpa_send_eapol(sm->wpa_auth, sm,
5141 (secure ? WPA_KEY_INFO_SECURE : 0) |
5142 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5143 WPA_KEY_INFO_MIC : 0) |
5144 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
5145 WPA_KEY_INFO_KEY_TYPE,
5146 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
5152 int wpa_auth_resend_group_m1(struct wpa_state_machine *sm,
5153 void (*cb)(void *ctx1, void *ctx2),
5154 void *ctx1, void *ctx2)
5156 u8 rsc[WPA_KEY_RSC_LEN];
5157 struct wpa_group *gsm = sm->group;
5159 u8 *kde_buf = NULL, *pos, hdr[2];
5160 #ifdef CONFIG_IEEE80211W
5162 #endif /* CONFIG_IEEE80211W */
5166 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
5167 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
5169 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5170 "sending 1/2 msg of Group Key Handshake (TESTING)");
5172 gtk = gsm->GTK[gsm->GN - 1];
5173 if (sm->wpa == WPA_VERSION_WPA2) {
5174 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
5175 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
5176 kde_buf = os_malloc(kde_len);
5177 if (kde_buf == NULL)
5180 kde = pos = kde_buf;
5181 hdr[0] = gsm->GN & 0x03;
5183 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5185 #ifdef CONFIG_IEEE80211W
5187 pos = ieee80211w_kde_add(sm, pos);
5189 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5190 /* skip KDE header and keyid */
5191 opos += 2 + RSN_SELECTOR_LEN + 2;
5192 os_memset(opos, 0, 6); /* clear PN */
5194 #endif /* CONFIG_IEEE80211W */
5195 if (ocv_oci_add(sm, &pos) < 0) {
5199 kde_len = pos - kde;
5202 kde_len = gsm->GTK_len;
5205 sm->eapol_status_cb = cb;
5206 sm->eapol_status_cb_ctx1 = ctx1;
5207 sm->eapol_status_cb_ctx2 = ctx2;
5209 wpa_send_eapol(sm->wpa_auth, sm,
5210 WPA_KEY_INFO_SECURE |
5211 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5212 WPA_KEY_INFO_MIC : 0) |
5214 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
5215 rsc, NULL, kde, kde_len, gsm->GN, 1);
5222 int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth)
5226 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
5227 return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL);
5230 #endif /* CONFIG_TESTING_OPTIONS */