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Suite B: PMKID derivation for AKM 00-0F-AC:11
[thirdparty/hostap.git] / src / ap / wpa_auth.c
CommitLineData
6fc6879b 1/*
00338a4f 2 * IEEE 802.11 RSN / WPA Authenticator
94ddef3e 3 * Copyright (c) 2004-2013, Jouni Malinen <j@w1.fi>
6fc6879b 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
6226e38d 9#include "utils/includes.h"
6fc6879b 10
6226e38d
JM		 11#include "utils/common.h"
12#include "utils/eloop.h"
13#include "utils/state_machine.h"
25ef8529 14#include "utils/bitfield.h"
81f4f619 15#include "common/ieee802_11_defs.h"
03da66bd
JM		 16#include "crypto/aes_wrap.h"
17#include "crypto/crypto.h"
18#include "crypto/sha1.h"
19#include "crypto/sha256.h"
3642c431 20#include "crypto/random.h"
281c950b 21#include "eapol_auth/eapol_auth_sm.h"
6226e38d 22#include "ap_config.h"
6fc6879b 23#include "ieee802_11.h"
6226e38d
JM		 24#include "wpa_auth.h"
25#include "pmksa_cache_auth.h"
6fc6879b
JM		 26#include "wpa_auth_i.h"
27#include "wpa_auth_ie.h"
28
29#define STATE_MACHINE_DATA struct wpa_state_machine
30#define STATE_MACHINE_DEBUG_PREFIX "WPA"
31#define STATE_MACHINE_ADDR sm->addr
32
33
34static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 35static int wpa_sm_step(struct wpa_state_machine *sm);
6fc6879b
JM		 36static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
37static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
38static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
39 struct wpa_group *group);
581a8cde 40static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 41static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
42 struct wpa_group *group);
1bdb7ab3
JM		 43static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
44 struct wpa_group *group);
6fc6879b 45
bae61562
JM		 46static const u32 dot11RSNAConfigGroupUpdateCount = 4;
47static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
48static const u32 eapol_key_timeout_first = 100; /* ms */
49static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 50static const u32 eapol_key_timeout_first_group = 500; /* ms */
6fc6879b
JM		 51
52/* TODO: make these configurable */
53static const int dot11RSNAConfigPMKLifetime = 43200;
54static const int dot11RSNAConfigPMKReauthThreshold = 70;
55static const int dot11RSNAConfigSATimeout = 60;
56
57
c772d054 58static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 59 struct wpa_authenticator *wpa_auth, const u8 *addr)
60{
61 if (wpa_auth->cb.mic_failure_report)
c772d054
JM		 62 return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
63 return 0;
6fc6879b
JM		 64}
65
66
67static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
68 const u8 *addr, wpa_eapol_variable var,
69 int value)
70{
71 if (wpa_auth->cb.set_eapol)
72 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
73}
74
75
76static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
77 const u8 *addr, wpa_eapol_variable var)
78{
79 if (wpa_auth->cb.get_eapol == NULL)
80 return -1;
81 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
82}
83
84
85static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 86 const u8 *addr,
87 const u8 *p2p_dev_addr,
88 const u8 *prev_psk)
6fc6879b
JM		 89{
90 if (wpa_auth->cb.get_psk == NULL)
91 return NULL;
759fd76b
JM		 92 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
93 prev_psk);
6fc6879b
JM		 94}
95
96
97static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
98 const u8 *addr, u8 *msk, size_t *len)
99{
100 if (wpa_auth->cb.get_msk == NULL)
101 return -1;
102 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
103}
104
105
106static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
107 int vlan_id,
71934751 108 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 109 u8 *key, size_t key_len)
110{
111 if (wpa_auth->cb.set_key == NULL)
112 return -1;
113 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
114 key, key_len);
115}
116
117
118static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
119 const u8 *addr, int idx, u8 *seq)
120{
121 if (wpa_auth->cb.get_seqnum == NULL)
122 return -1;
123 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
124}
125
126
6fc6879b
JM		 127static inline int
128wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
129 const u8 *data, size_t data_len, int encrypt)
130{
131 if (wpa_auth->cb.send_eapol == NULL)
132 return -1;
133 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
134 encrypt);
135}
136
137
138int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
139 int (*cb)(struct wpa_state_machine *sm, void *ctx),
140 void *cb_ctx)
141{
142 if (wpa_auth->cb.for_each_sta == NULL)
143 return 0;
144 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
145}
146
147
bf98f7f3
JM		 148int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
149 int (*cb)(struct wpa_authenticator *a, void *ctx),
150 void *cb_ctx)
151{
152 if (wpa_auth->cb.for_each_auth == NULL)
153 return 0;
154 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
155}
156
157
6fc6879b
JM		 158void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
159 logger_level level, const char *txt)
160{
161 if (wpa_auth->cb.logger == NULL)
162 return;
163 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
164}
165
166
167void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
168 logger_level level, const char *fmt, ...)
169{
170 char *format;
171 int maxlen;
172 va_list ap;
173
174 if (wpa_auth->cb.logger == NULL)
175 return;
176
177 maxlen = os_strlen(fmt) + 100;
178 format = os_malloc(maxlen);
179 if (!format)
180 return;
181
182 va_start(ap, fmt);
183 vsnprintf(format, maxlen, fmt, ap);
184 va_end(ap);
185
186 wpa_auth_logger(wpa_auth, addr, level, format);
187
188 os_free(format);
189}
190
191
192static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
193 const u8 *addr)
194{
195 if (wpa_auth->cb.disconnect == NULL)
196 return;
afcc9ea1 197 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
6fc6879b
JM		 198 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
199 WLAN_REASON_PREV_AUTH_NOT_VALID);
200}
201
202
203static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
204{
56586197 205 int ret = 0;
6fc6879b 206#ifdef CONFIG_IEEE80211R
56586197
JM		 207 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
208 ret = 1;
6fc6879b 209#endif /* CONFIG_IEEE80211R */
56586197
JM		 210#ifdef CONFIG_IEEE80211W
211 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
212 ret = 1;
213#endif /* CONFIG_IEEE80211W */
a14896e8
JM		 214 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
215 ret = 1;
56586197 216 return ret;
6fc6879b
JM		 217}
218
219
220static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
221{
222 struct wpa_authenticator *wpa_auth = eloop_ctx;
223
3642c431 224 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 225 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
226 "initialization.");
227 } else {
228 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 229 wpa_hexdump_key(MSG_DEBUG, "GMK",
230 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 231 }
232
233 if (wpa_auth->conf.wpa_gmk_rekey) {
234 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
235 wpa_rekey_gmk, wpa_auth, NULL);
236 }
237}
238
239
240static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
241{
242 struct wpa_authenticator *wpa_auth = eloop_ctx;
243 struct wpa_group *group;
244
245 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
246 for (group = wpa_auth->group; group; group = group->next) {
247 group->GTKReKey = TRUE;
248 do {
249 group->changed = FALSE;
250 wpa_group_sm_step(wpa_auth, group);
251 } while (group->changed);
252 }
253
254 if (wpa_auth->conf.wpa_group_rekey) {
255 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
256 0, wpa_rekey_gtk, wpa_auth, NULL);
257 }
258}
259
260
581a8cde
JM		 261static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
262{
263 struct wpa_authenticator *wpa_auth = eloop_ctx;
264 struct wpa_state_machine *sm = timeout_ctx;
265
266 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
267 wpa_request_new_ptk(sm);
268 wpa_sm_step(sm);
269}
270
271
6fc6879b
JM		 272static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
273{
274 if (sm->pmksa == ctx)
275 sm->pmksa = NULL;
276 return 0;
277}
278
279
280static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
281 void *ctx)
282{
283 struct wpa_authenticator *wpa_auth = ctx;
284 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
285}
286
287
1bdb7ab3
JM		 288static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
289 struct wpa_group *group)
290{
559cdabb 291 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 292 u8 rkey[32];
559cdabb 293 unsigned long ptr;
1bdb7ab3 294
3642c431 295 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 296 return -1;
297 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
298
299 /*
300 * Counter = PRF-256(Random number, "Init Counter",
301 * Local MAC Address || Time)
302 */
303 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
304 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 305 ptr = (unsigned long) group;
306 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
3642c431 307 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 308 return -1;
309
310 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
311 group->Counter, WPA_NONCE_LEN) < 0)
312 return -1;
313 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
314 group->Counter, WPA_NONCE_LEN);
315
316 return 0;
317}
318
319
e6965d4e 320static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 321 int vlan_id, int delay_init)
e6965d4e
JM		 322{
323 struct wpa_group *group;
e6965d4e
JM		 324
325 group = os_zalloc(sizeof(struct wpa_group));
326 if (group == NULL)
327 return NULL;
328
329 group->GTKAuthenticator = TRUE;
330 group->vlan_id = vlan_id;
c3550295 331 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 332
08704cd8
JM		 333 if (random_pool_ready() != 1) {
334 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
335 "for secure operations - update keys later when "
336 "the first station connects");
337 }
338
1bdb7ab3
JM		 339 /*
340 * Set initial GMK/Counter value here. The actual values that will be
341 * used in negotiations will be set once the first station tries to
342 * connect. This allows more time for collecting additional randomness
343 * on embedded devices.
6fc6879b 344 */
1bdb7ab3 345 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 346 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
347 "initialization.");
348 os_free(group);
349 return NULL;
350 }
6fc6879b
JM		 351
352 group->GInit = TRUE;
bdffdc5d
JM		 353 if (delay_init) {
354 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
355 "until Beacon frames have been configured");
356 /* Initialization is completed in wpa_init_keys(). */
357 } else {
358 wpa_group_sm_step(wpa_auth, group);
359 group->GInit = FALSE;
360 wpa_group_sm_step(wpa_auth, group);
361 }
6fc6879b
JM		 362
363 return group;
364}
365
366
367/**
368 * wpa_init - Initialize WPA authenticator
369 * @addr: Authenticator address
370 * @conf: Configuration for WPA authenticator
a17df5fb 371 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 372 * Returns: Pointer to WPA authenticator data or %NULL on failure
373 */
374struct wpa_authenticator * wpa_init(const u8 *addr,
375 struct wpa_auth_config *conf,
376 struct wpa_auth_callbacks *cb)
377{
378 struct wpa_authenticator *wpa_auth;
379
380 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
381 if (wpa_auth == NULL)
382 return NULL;
383 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
384 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
385 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
386
387 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
388 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
389 os_free(wpa_auth);
390 return NULL;
391 }
392
bdffdc5d 393 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 394 if (wpa_auth->group == NULL) {
395 os_free(wpa_auth->wpa_ie);
396 os_free(wpa_auth);
397 return NULL;
398 }
399
4bb081f1
JM		 400 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
401 wpa_auth);
6fc6879b
JM		 402 if (wpa_auth->pmksa == NULL) {
403 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
404 os_free(wpa_auth->wpa_ie);
405 os_free(wpa_auth);
406 return NULL;
407 }
408
409#ifdef CONFIG_IEEE80211R
410 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
411 if (wpa_auth->ft_pmk_cache == NULL) {
412 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
413 os_free(wpa_auth->wpa_ie);
4bb081f1 414 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 415 os_free(wpa_auth);
416 return NULL;
417 }
418#endif /* CONFIG_IEEE80211R */
419
420 if (wpa_auth->conf.wpa_gmk_rekey) {
421 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
422 wpa_rekey_gmk, wpa_auth, NULL);
423 }
424
425 if (wpa_auth->conf.wpa_group_rekey) {
426 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
427 wpa_rekey_gtk, wpa_auth, NULL);
428 }
429
25ef8529
JM		 430#ifdef CONFIG_P2P
431 if (WPA_GET_BE32(conf->ip_addr_start)) {
432 int count = WPA_GET_BE32(conf->ip_addr_end) -
433 WPA_GET_BE32(conf->ip_addr_start) + 1;
434 if (count > 1000)
435 count = 1000;
436 if (count > 0)
437 wpa_auth->ip_pool = bitfield_alloc(count);
438 }
439#endif /* CONFIG_P2P */
440
6fc6879b
JM		 441 return wpa_auth;
442}
443
444
bdffdc5d
JM		 445int wpa_init_keys(struct wpa_authenticator *wpa_auth)
446{
447 struct wpa_group *group = wpa_auth->group;
448
449 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
450 "keys");
451 wpa_group_sm_step(wpa_auth, group);
452 group->GInit = FALSE;
453 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 454 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
455 return -1;
bdffdc5d
JM		 456 return 0;
457}
458
459
6fc6879b
JM		 460/**
461 * wpa_deinit - Deinitialize WPA authenticator
462 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
463 */
464void wpa_deinit(struct wpa_authenticator *wpa_auth)
465{
466 struct wpa_group *group, *prev;
467
468 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
469 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
470
471#ifdef CONFIG_PEERKEY
472 while (wpa_auth->stsl_negotiations)
473 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
474#endif /* CONFIG_PEERKEY */
475
4bb081f1 476 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 477
478#ifdef CONFIG_IEEE80211R
479 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
480 wpa_auth->ft_pmk_cache = NULL;
481#endif /* CONFIG_IEEE80211R */
482
25ef8529
JM		 483#ifdef CONFIG_P2P
484 bitfield_free(wpa_auth->ip_pool);
485#endif /* CONFIG_P2P */
486
487
6fc6879b
JM		 488 os_free(wpa_auth->wpa_ie);
489
490 group = wpa_auth->group;
491 while (group) {
492 prev = group;
493 group = group->next;
494 os_free(prev);
495 }
496
497 os_free(wpa_auth);
498}
499
500
501/**
502 * wpa_reconfig - Update WPA authenticator configuration
503 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
504 * @conf: Configuration for WPA authenticator
505 */
506int wpa_reconfig(struct wpa_authenticator *wpa_auth,
507 struct wpa_auth_config *conf)
508{
e6965d4e 509 struct wpa_group *group;
6fc6879b
JM		 510 if (wpa_auth == NULL)
511 return 0;
512
513 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 514 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
515 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
516 return -1;
517 }
518
e6965d4e
JM		 519 /*
520 * Reinitialize GTK to make sure it is suitable for the new
521 * configuration.
522 */
523 group = wpa_auth->group;
c3550295 524 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 525 group->GInit = TRUE;
526 wpa_group_sm_step(wpa_auth, group);
527 group->GInit = FALSE;
528 wpa_group_sm_step(wpa_auth, group);
529
6fc6879b
JM		 530 return 0;
531}
532
533
534struct wpa_state_machine *
94ddef3e
JM		 535wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
536 const u8 *p2p_dev_addr)
6fc6879b
JM		 537{
538 struct wpa_state_machine *sm;
539
7d7f7be2
JM		 540 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
541 return NULL;
542
6fc6879b
JM		 543 sm = os_zalloc(sizeof(struct wpa_state_machine));
544 if (sm == NULL)
545 return NULL;
546 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 547 if (p2p_dev_addr)
548 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 549
550 sm->wpa_auth = wpa_auth;
551 sm->group = wpa_auth->group;
552
553 return sm;
554}
555
556
6f9b5d16
JM		 557int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
558 struct wpa_state_machine *sm)
6fc6879b
JM		 559{
560 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 561 return -1;
6fc6879b
JM		 562
563#ifdef CONFIG_IEEE80211R
564 if (sm->ft_completed) {
565 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
566 "FT authentication already completed - do not "
567 "start 4-way handshake");
3d4d2348
JM		 568 /* Go to PTKINITDONE state to allow GTK rekeying */
569 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
6f9b5d16 570 return 0;
6fc6879b
JM		 571 }
572#endif /* CONFIG_IEEE80211R */
573
574 if (sm->started) {
22a299ee 575 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 576 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 577 return wpa_sm_step(sm);
6fc6879b
JM		 578 }
579
580 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
581 "start authentication");
582 sm->started = 1;
583
584 sm->Init = TRUE;
e4a6ea1d 585 if (wpa_sm_step(sm) == 1)
6f9b5d16 586 return 1; /* should not really happen */
6fc6879b
JM		 587 sm->Init = FALSE;
588 sm->AuthenticationRequest = TRUE;
6f9b5d16 589 return wpa_sm_step(sm);
6fc6879b
JM		 590}
591
592
a8d05fca
JM		 593void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
594{
595 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
596 * reassociates back to the same AP while the previous entry for the
597 * STA has not yet been removed. */
598 if (sm == NULL)
599 return;
600
601 sm->wpa_key_mgmt = 0;
602}
603
604
6fc6879b
JM		 605static void wpa_free_sta_sm(struct wpa_state_machine *sm)
606{
25ef8529
JM		 607#ifdef CONFIG_P2P
608 if (WPA_GET_BE32(sm->ip_addr)) {
609 u32 start;
610 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
611 "address %u.%u.%u.%u from " MACSTR,
612 sm->ip_addr[0], sm->ip_addr[1],
613 sm->ip_addr[2], sm->ip_addr[3],
614 MAC2STR(sm->addr));
615 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
616 bitfield_clear(sm->wpa_auth->ip_pool,
617 WPA_GET_BE32(sm->ip_addr) - start);
618 }
619#endif /* CONFIG_P2P */
2ade8ef2
JM		 620 if (sm->GUpdateStationKeys) {
621 sm->group->GKeyDoneStations--;
622 sm->GUpdateStationKeys = FALSE;
623 }
0f857f43
JM		 624#ifdef CONFIG_IEEE80211R
625 os_free(sm->assoc_resp_ftie);
692ec305 626 wpabuf_free(sm->ft_pending_req_ies);
0f857f43 627#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 628 os_free(sm->last_rx_eapol_key);
629 os_free(sm->wpa_ie);
630 os_free(sm);
631}
632
633
634void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
635{
636 if (sm == NULL)
637 return;
638
639 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
640 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
641 "strict rekeying - force GTK rekey since STA "
642 "is leaving");
643 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
644 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
645 NULL);
646 }
647
648 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 649 sm->pending_1_of_4_timeout = 0;
6fc6879b 650 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 651 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 652 if (sm->in_step_loop) {
653 /* Must not free state machine while wpa_sm_step() is running.
654 * Freeing will be completed in the end of wpa_sm_step(). */
655 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
656 "machine deinit for " MACSTR, MAC2STR(sm->addr));
657 sm->pending_deinit = 1;
658 } else
659 wpa_free_sta_sm(sm);
660}
661
662
663static void wpa_request_new_ptk(struct wpa_state_machine *sm)
664{
665 if (sm == NULL)
666 return;
667
668 sm->PTKRequest = TRUE;
669 sm->PTK_valid = 0;
670}
671
672
68921e24 673static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 674 const u8 *replay_counter)
675{
676 int i;
677 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 678 if (!ctr[i].valid)
22a299ee 679 break;
68921e24 680 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 681 WPA_REPLAY_COUNTER_LEN) == 0)
682 return 1;
683 }
684 return 0;
685}
686
687
68921e24
JM		 688static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
689 const u8 *replay_counter)
690{
691 int i;
692 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
693 if (ctr[i].valid &&
694 (replay_counter == NULL ||
695 os_memcmp(replay_counter, ctr[i].counter,
696 WPA_REPLAY_COUNTER_LEN) == 0))
697 ctr[i].valid = FALSE;
698 }
699}
700
701
0f857f43
JM		 702#ifdef CONFIG_IEEE80211R
703static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
704 struct wpa_state_machine *sm,
705 struct wpa_eapol_ie_parse *kde)
706{
707 struct wpa_ie_data ie;
708 struct rsn_mdie *mdie;
709
710 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
711 ie.num_pmkid != 1 || ie.pmkid == NULL) {
712 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
713 "FT 4-way handshake message 2/4");
714 return -1;
715 }
716
717 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
718 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
719 sm->sup_pmk_r1_name, PMKID_LEN);
720
721 if (!kde->mdie || !kde->ftie) {
722 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
723 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
724 return -1;
725 }
726
727 mdie = (struct rsn_mdie *) (kde->mdie + 2);
728 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
729 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
730 MOBILITY_DOMAIN_ID_LEN) != 0) {
731 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
732 return -1;
733 }
734
735 if (sm->assoc_resp_ftie &&
736 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
737 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
738 2 + sm->assoc_resp_ftie[1]) != 0)) {
739 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
740 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
741 kde->ftie, kde->ftie_len);
742 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
743 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
744 return -1;
745 }
746
747 return 0;
748}
749#endif /* CONFIG_IEEE80211R */
750
751
c772d054
JM		 752static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
753 struct wpa_state_machine *sm, int group)
ec027805
JM		 754{
755 /* Supplicant reported a Michael MIC error */
756 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
757 "received EAPOL-Key Error Request "
758 "(STA detected Michael MIC failure (group=%d))",
759 group);
fbc72d32
JM		 760
761 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
762 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
763 "ignore Michael MIC failure report since "
764 "group cipher is not TKIP");
765 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
766 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
767 "ignore Michael MIC failure report since "
768 "pairwise cipher is not TKIP");
769 } else {
c772d054
JM		 770 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
771 return 1; /* STA entry was removed */
fbc72d32
JM		 772 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
773 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
774 }
ec027805
JM		 775
776 /*
777 * Error report is not a request for a new key handshake, but since
778 * Authenticator may do it, let's change the keys now anyway.
779 */
780 wpa_request_new_ptk(sm);
c772d054 781 return 0;
ec027805
JM		 782}
783
784
6fc6879b
JM		 785void wpa_receive(struct wpa_authenticator *wpa_auth,
786 struct wpa_state_machine *sm,
787 u8 *data, size_t data_len)
788{
789 struct ieee802_1x_hdr *hdr;
790 struct wpa_eapol_key *key;
791 u16 key_info, key_data_length;
792 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
793 SMK_M1, SMK_M3, SMK_ERROR } msg;
794 char *msgtxt;
795 struct wpa_eapol_ie_parse kde;
26e23750 796 int ft;
1566ec46
JM		 797 const u8 *eapol_key_ie;
798 size_t eapol_key_ie_len;
6fc6879b
JM		 799
800 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
801 return;
802
803 if (data_len < sizeof(*hdr) + sizeof(*key))
804 return;
805
806 hdr = (struct ieee802_1x_hdr *) data;
807 key = (struct wpa_eapol_key *) (hdr + 1);
808 key_info = WPA_GET_BE16(key->key_info);
809 key_data_length = WPA_GET_BE16(key->key_data_length);
0d442aff
JM		 810 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
811 " key_info=0x%x type=%u key_data_length=%u",
812 MAC2STR(sm->addr), key_info, key->type, key_data_length);
6fc6879b
JM		 813 if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
814 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
815 "key_data overflow (%d > %lu)",
816 key_data_length,
817 (unsigned long) (data_len - sizeof(*hdr) -
818 sizeof(*key)));
819 return;
820 }
821
f8e96eb6 822 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 823 if (key->type == EAPOL_KEY_TYPE_WPA) {
824 /*
825 * Some deployed station implementations seem to send
826 * msg 4/4 with incorrect type value in WPA2 mode.
827 */
828 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
829 "with unexpected WPA type in RSN mode");
830 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 831 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
832 "unexpected type %d in RSN mode",
833 key->type);
834 return;
835 }
836 } else {
837 if (key->type != EAPOL_KEY_TYPE_WPA) {
838 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
839 "unexpected type %d in WPA mode",
840 key->type);
841 return;
842 }
843 }
844
bc8318ac
JM		 845 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
846 WPA_NONCE_LEN);
847 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
848 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
849
6fc6879b
JM		 850 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
851 * are set */
852
853 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
854 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
855 if (key_info & WPA_KEY_INFO_ERROR) {
856 msg = SMK_ERROR;
857 msgtxt = "SMK Error";
858 } else {
859 msg = SMK_M1;
860 msgtxt = "SMK M1";
861 }
862 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
863 msg = SMK_M3;
864 msgtxt = "SMK M3";
865 } else if (key_info & WPA_KEY_INFO_REQUEST) {
866 msg = REQUEST;
867 msgtxt = "Request";
868 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
869 msg = GROUP_2;
870 msgtxt = "2/2 Group";
871 } else if (key_data_length == 0) {
872 msg = PAIRWISE_4;
873 msgtxt = "4/4 Pairwise";
874 } else {
875 msg = PAIRWISE_2;
876 msgtxt = "2/4 Pairwise";
877 }
878
879 /* TODO: key_info type validation for PeerKey */
880 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
881 msg == GROUP_2) {
882 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 883 if (sm->pairwise == WPA_CIPHER_CCMP ||
884 sm->pairwise == WPA_CIPHER_GCMP) {
6fc6879b 885 if (wpa_use_aes_cmac(sm) &&
a14896e8 886 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
6fc6879b
JM		 887 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
888 wpa_auth_logger(wpa_auth, sm->addr,
889 LOGGER_WARNING,
890 "advertised support for "
891 "AES-128-CMAC, but did not "
892 "use it");
893 return;
894 }
895
896 if (!wpa_use_aes_cmac(sm) &&
897 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
898 wpa_auth_logger(wpa_auth, sm->addr,
899 LOGGER_WARNING,
900 "did not use HMAC-SHA1-AES "
eb7719ff 901 "with CCMP/GCMP");
6fc6879b
JM		 902 return;
903 }
904 }
905 }
906
907 if (key_info & WPA_KEY_INFO_REQUEST) {
908 if (sm->req_replay_counter_used &&
909 os_memcmp(key->replay_counter, sm->req_replay_counter,
910 WPA_REPLAY_COUNTER_LEN) <= 0) {
911 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
912 "received EAPOL-Key request with "
913 "replayed counter");
914 return;
915 }
916 }
917
918 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 919 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 920 int i;
68921e24
JM		 921
922 if (msg == PAIRWISE_2 &&
923 wpa_replay_counter_valid(sm->prev_key_replay,
924 key->replay_counter) &&
925 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
926 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
927 {
928 /*
929 * Some supplicant implementations (e.g., Windows XP
930 * WZC) update SNonce for each EAPOL-Key 2/4. This
931 * breaks the workaround on accepting any of the
932 * pending requests, so allow the SNonce to be updated
933 * even if we have already sent out EAPOL-Key 3/4.
934 */
935 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
936 "Process SNonce update from STA "
937 "based on retransmitted EAPOL-Key "
938 "1/4");
939 sm->update_snonce = 1;
940 wpa_replay_counter_mark_invalid(sm->prev_key_replay,
941 key->replay_counter);
942 goto continue_processing;
943 }
944
945 if (msg == PAIRWISE_2 &&
946 wpa_replay_counter_valid(sm->prev_key_replay,
947 key->replay_counter) &&
948 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
949 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
950 "ignore retransmitted EAPOL-Key %s - "
951 "SNonce did not change", msgtxt);
952 } else {
953 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
954 "received EAPOL-Key %s with "
955 "unexpected replay counter", msgtxt);
956 }
22a299ee
JM		 957 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
958 if (!sm->key_replay[i].valid)
959 break;
960 wpa_hexdump(MSG_DEBUG, "pending replay counter",
961 sm->key_replay[i].counter,
962 WPA_REPLAY_COUNTER_LEN);
963 }
6fc6879b
JM		 964 wpa_hexdump(MSG_DEBUG, "received replay counter",
965 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
966 return;
967 }
968
68921e24 969continue_processing:
6fc6879b
JM		 970 switch (msg) {
971 case PAIRWISE_2:
972 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 973 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
974 (!sm->update_snonce ||
975 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 976 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
977 "received EAPOL-Key msg 2/4 in "
978 "invalid state (%d) - dropped",
979 sm->wpa_ptk_state);
980 return;
981 }
bbb921da 982 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 983 if (sm->group->reject_4way_hs_for_entropy) {
984 /*
985 * The system did not have enough entropy to generate
986 * strong random numbers. Reject the first 4-way
987 * handshake(s) and collect some entropy based on the
988 * information from it. Once enough entropy is
989 * available, the next atempt will trigger GMK/Key
990 * Counter update and the station will be allowed to
991 * continue.
992 */
993 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
994 "collect more entropy for random number "
995 "generation");
08704cd8 996 random_mark_pool_ready();
08704cd8
JM		 997 wpa_sta_disconnect(wpa_auth, sm->addr);
998 return;
999 }
1566ec46
JM		 1000 if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length,
1001 &kde) < 0) {
1002 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1003 "received EAPOL-Key msg 2/4 with "
1004 "invalid Key Data contents");
1005 return;
1006 }
1007 if (kde.rsn_ie) {
1008 eapol_key_ie = kde.rsn_ie;
1009 eapol_key_ie_len = kde.rsn_ie_len;
a14896e8
JM		 1010 } else if (kde.osen) {
1011 eapol_key_ie = kde.osen;
1012 eapol_key_ie_len = kde.osen_len;
1566ec46
JM		 1013 } else {
1014 eapol_key_ie = kde.wpa_ie;
1015 eapol_key_ie_len = kde.wpa_ie_len;
1016 }
26e23750
JM		 1017 ft = sm->wpa == WPA_VERSION_WPA2 &&
1018 wpa_key_mgmt_ft(sm->wpa_key_mgmt);
6fc6879b 1019 if (sm->wpa_ie == NULL ||
26e23750
JM		 1020 wpa_compare_rsn_ie(ft,
1021 sm->wpa_ie, sm->wpa_ie_len,
1566ec46 1022 eapol_key_ie, eapol_key_ie_len)) {
6fc6879b
JM		 1023 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1024 "WPA IE from (Re)AssocReq did not "
1025 "match with msg 2/4");
1026 if (sm->wpa_ie) {
1027 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
1028 sm->wpa_ie, sm->wpa_ie_len);
1029 }
1030 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1566ec46 1031 eapol_key_ie, eapol_key_ie_len);
6fc6879b
JM		 1032 /* MLME-DEAUTHENTICATE.request */
1033 wpa_sta_disconnect(wpa_auth, sm->addr);
1034 return;
1035 }
26e23750 1036#ifdef CONFIG_IEEE80211R
0f857f43
JM		 1037 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
1038 wpa_sta_disconnect(wpa_auth, sm->addr);
1039 return;
26e23750
JM		 1040 }
1041#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 1042#ifdef CONFIG_P2P
1043 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
1044 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
1045 int idx;
1046 wpa_printf(MSG_DEBUG, "P2P: IP address requested in "
1047 "EAPOL-Key exchange");
1048 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
1049 if (idx >= 0) {
1050 u32 start = WPA_GET_BE32(wpa_auth->conf.
1051 ip_addr_start);
1052 bitfield_set(wpa_auth->ip_pool, idx);
1053 WPA_PUT_BE32(sm->ip_addr, start + idx);
1054 wpa_printf(MSG_DEBUG, "P2P: Assigned IP "
1055 "address %u.%u.%u.%u to " MACSTR,
1056 sm->ip_addr[0], sm->ip_addr[1],
1057 sm->ip_addr[2], sm->ip_addr[3],
1058 MAC2STR(sm->addr));
1059 }
1060 }
1061#endif /* CONFIG_P2P */
6fc6879b
JM		 1062 break;
1063 case PAIRWISE_4:
1064 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1065 !sm->PTK_valid) {
1066 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1067 "received EAPOL-Key msg 4/4 in "
1068 "invalid state (%d) - dropped",
1069 sm->wpa_ptk_state);
1070 return;
1071 }
1072 break;
1073 case GROUP_2:
1074 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1075 || !sm->PTK_valid) {
1076 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1077 "received EAPOL-Key msg 2/2 in "
1078 "invalid state (%d) - dropped",
1079 sm->wpa_ptk_group_state);
1080 return;
1081 }
1082 break;
1083#ifdef CONFIG_PEERKEY
1084 case SMK_M1:
1085 case SMK_M3:
1086 case SMK_ERROR:
1087 if (!wpa_auth->conf.peerkey) {
1088 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1089 "PeerKey use disabled - ignoring message");
1090 return;
1091 }
1092 if (!sm->PTK_valid) {
1093 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1094 "received EAPOL-Key msg SMK in "
1095 "invalid state - dropped");
1096 return;
1097 }
1098 break;
1099#else /* CONFIG_PEERKEY */
1100 case SMK_M1:
1101 case SMK_M3:
1102 case SMK_ERROR:
1103 return; /* STSL disabled - ignore SMK messages */
1104#endif /* CONFIG_PEERKEY */
1105 case REQUEST:
1106 break;
1107 }
1108
1109 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1110 "received EAPOL-Key frame (%s)", msgtxt);
1111
1112 if (key_info & WPA_KEY_INFO_ACK) {
1113 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1114 "received invalid EAPOL-Key: Key Ack set");
1115 return;
1116 }
1117
1118 if (!(key_info & WPA_KEY_INFO_MIC)) {
1119 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1120 "received invalid EAPOL-Key: Key MIC not set");
1121 return;
1122 }
1123
1124 sm->MICVerified = FALSE;
68921e24 1125 if (sm->PTK_valid && !sm->update_snonce) {
6fc6879b
JM		 1126 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
1127 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1128 "received EAPOL-Key with invalid MIC");
1129 return;
1130 }
1131 sm->MICVerified = TRUE;
1132 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1133 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1134 }
1135
1136 if (key_info & WPA_KEY_INFO_REQUEST) {
1137 if (sm->MICVerified) {
1138 sm->req_replay_counter_used = 1;
1139 os_memcpy(sm->req_replay_counter, key->replay_counter,
1140 WPA_REPLAY_COUNTER_LEN);
1141 } else {
1142 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1143 "received EAPOL-Key request with "
1144 "invalid MIC");
1145 return;
1146 }
1147
1148 /*
1149 * TODO: should decrypt key data field if encryption was used;
1150 * even though MAC address KDE is not normally encrypted,
1151 * supplicant is allowed to encrypt it.
1152 */
1153 if (msg == SMK_ERROR) {
1154#ifdef CONFIG_PEERKEY
1155 wpa_smk_error(wpa_auth, sm, key);
1156#endif /* CONFIG_PEERKEY */
1157 return;
1158 } else if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1159 if (wpa_receive_error_report(
1160 wpa_auth, sm,
1161 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1162 return; /* STA entry was removed */
6fc6879b
JM		 1163 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1164 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1165 "received EAPOL-Key Request for new "
1166 "4-Way Handshake");
1167 wpa_request_new_ptk(sm);
1168#ifdef CONFIG_PEERKEY
1169 } else if (msg == SMK_M1) {
1170 wpa_smk_m1(wpa_auth, sm, key);
1171#endif /* CONFIG_PEERKEY */
1172 } else if (key_data_length > 0 &&
1173 wpa_parse_kde_ies((const u8 *) (key + 1),
1174 key_data_length, &kde) == 0 &&
1175 kde.mac_addr) {
1176 } else {
1177 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1178 "received EAPOL-Key Request for GTK "
1179 "rekeying");
6fc6879b
JM		 1180 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1181 wpa_rekey_gtk(wpa_auth, NULL);
1182 }
1183 } else {
68921e24
JM		 1184 /* Do not allow the same key replay counter to be reused. */
1185 wpa_replay_counter_mark_invalid(sm->key_replay,
1186 key->replay_counter);
1187
1188 if (msg == PAIRWISE_2) {
1189 /*
1190 * Maintain a copy of the pending EAPOL-Key frames in
1191 * case the EAPOL-Key frame was retransmitted. This is
1192 * needed to allow EAPOL-Key msg 2/4 reply to another
1193 * pending msg 1/4 to update the SNonce to work around
1194 * unexpected supplicant behavior.
1195 */
1196 os_memcpy(sm->prev_key_replay, sm->key_replay,
1197 sizeof(sm->key_replay));
1198 } else {
1199 os_memset(sm->prev_key_replay, 0,
1200 sizeof(sm->prev_key_replay));
1201 }
1202
1203 /*
1204 * Make sure old valid counters are not accepted anymore and
1205 * do not get copied again.
1206 */
1207 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1208 }
1209
1210#ifdef CONFIG_PEERKEY
1211 if (msg == SMK_M3) {
1212 wpa_smk_m3(wpa_auth, sm, key);
1213 return;
1214 }
1215#endif /* CONFIG_PEERKEY */
1216
1217 os_free(sm->last_rx_eapol_key);
1218 sm->last_rx_eapol_key = os_malloc(data_len);
1219 if (sm->last_rx_eapol_key == NULL)
1220 return;
1221 os_memcpy(sm->last_rx_eapol_key, data, data_len);
1222 sm->last_rx_eapol_key_len = data_len;
1223
0d442aff 1224 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1225 sm->EAPOLKeyReceived = TRUE;
1226 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1227 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1228 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1229 wpa_sm_step(sm);
1230}
1231
1232
3c7302c2
JM		 1233static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1234 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1235{
5cb9d5c3
JM		 1236 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1237 u8 *pos;
3c7302c2 1238 int ret = 0;
6fc6879b 1239
5cb9d5c3
JM		 1240 /* GTK = PRF-X(GMK, "Group key expansion",
1241 * AA || GNonce || Time || random data)
1242 * The example described in the IEEE 802.11 standard uses only AA and
1243 * GNonce as inputs here. Add some more entropy since this derivation
1244 * is done only at the Authenticator and as such, does not need to be
1245 * exactly same.
1246 */
6fc6879b
JM		 1247 os_memcpy(data, addr, ETH_ALEN);
1248 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1249 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1250 wpa_get_ntp_timestamp(pos);
1251 pos += 8;
3642c431 1252 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1253 ret = -1;
6fc6879b 1254
56586197 1255#ifdef CONFIG_IEEE80211W
5cb9d5c3 1256 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1257#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1258 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1259 < 0)
1260 ret = -1;
56586197 1261#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1262
1263 return ret;
6fc6879b
JM		 1264}
1265
1266
1267static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1268{
1269 struct wpa_authenticator *wpa_auth = eloop_ctx;
1270 struct wpa_state_machine *sm = timeout_ctx;
1271
e4bf4db9 1272 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1273 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1274 sm->TimeoutEvt = TRUE;
1275 wpa_sm_step(sm);
1276}
1277
1278
1279void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1280 struct wpa_state_machine *sm, int key_info,
1281 const u8 *key_rsc, const u8 *nonce,
1282 const u8 *kde, size_t kde_len,
1283 int keyidx, int encr, int force_version)
1284{
1285 struct ieee802_1x_hdr *hdr;
1286 struct wpa_eapol_key *key;
1287 size_t len;
1288 int alg;
1289 int key_data_len, pad_len = 0;
1290 u8 *buf, *pos;
1291 int version, pairwise;
22a299ee 1292 int i;
6fc6879b
JM		 1293
1294 len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
1295
1296 if (force_version)
1297 version = force_version;
a14896e8
JM		 1298 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
1299 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
6fc6879b
JM		 1300 else if (wpa_use_aes_cmac(sm))
1301 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1302 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1303 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1304 else
1305 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1306
8543ed8a 1307 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1308
1309 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1310 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1311 "encr=%d)",
1312 version,
1313 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1314 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1315 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1316 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1317 pairwise, (unsigned long) kde_len, keyidx, encr);
1318
1319 key_data_len = kde_len;
1320
1321 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1322 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
6fc6879b
JM		 1323 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1324 pad_len = key_data_len % 8;
1325 if (pad_len)
1326 pad_len = 8 - pad_len;
1327 key_data_len += pad_len + 8;
1328 }
1329
1330 len += key_data_len;
1331
1332 hdr = os_zalloc(len);
1333 if (hdr == NULL)
1334 return;
1335 hdr->version = wpa_auth->conf.eapol_version;
1336 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1337 hdr->length = host_to_be16(len - sizeof(*hdr));
1338 key = (struct wpa_eapol_key *) (hdr + 1);
1339
1340 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1341 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1342 key_info |= version;
1343 if (encr && sm->wpa == WPA_VERSION_WPA2)
1344 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1345 if (sm->wpa != WPA_VERSION_WPA2)
1346 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1347 WPA_PUT_BE16(key->key_info, key_info);
1348
1349 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
c3550295 1350 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b
JM		 1351 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1352 WPA_PUT_BE16(key->key_length, 0);
1353
1354 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1355 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1356 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1357 os_memcpy(sm->key_replay[i].counter,
1358 sm->key_replay[i - 1].counter,
1359 WPA_REPLAY_COUNTER_LEN);
1360 }
1361 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1362 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1363 WPA_REPLAY_COUNTER_LEN);
22a299ee 1364 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1365
1366 if (nonce)
1367 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1368
1369 if (key_rsc)
1370 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1371
1372 if (kde && !encr) {
1373 os_memcpy(key + 1, kde, kde_len);
1374 WPA_PUT_BE16(key->key_data_length, kde_len);
1375 } else if (encr && kde) {
1376 buf = os_zalloc(key_data_len);
1377 if (buf == NULL) {
1378 os_free(hdr);
1379 return;
1380 }
1381 pos = buf;
1382 os_memcpy(pos, kde, kde_len);
1383 pos += kde_len;
1384
1385 if (pad_len)
1386 *pos++ = 0xdd;
1387
1388 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1389 buf, key_data_len);
1390 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1391 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
6fc6879b 1392 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
eefec1e4
JM		 1393 if (aes_wrap(sm->PTK.kek, 16,
1394 (key_data_len - 8) / 8, buf,
6fc6879b
JM		 1395 (u8 *) (key + 1))) {
1396 os_free(hdr);
1397 os_free(buf);
1398 return;
1399 }
1400 WPA_PUT_BE16(key->key_data_length, key_data_len);
1401 } else {
1402 u8 ek[32];
1403 os_memcpy(key->key_iv,
1404 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1405 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1406 os_memcpy(ek, key->key_iv, 16);
1407 os_memcpy(ek + 16, sm->PTK.kek, 16);
1408 os_memcpy(key + 1, buf, key_data_len);
1409 rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1410 WPA_PUT_BE16(key->key_data_length, key_data_len);
1411 }
1412 os_free(buf);
1413 }
1414
1415 if (key_info & WPA_KEY_INFO_MIC) {
1416 if (!sm->PTK_valid) {
1417 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1418 "PTK not valid when sending EAPOL-Key "
1419 "frame");
1420 os_free(hdr);
1421 return;
1422 }
1423 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1424 key->key_mic);
7af092a0
JB		 1425#ifdef CONFIG_TESTING_OPTIONS
1426 if (!pairwise &&
06df2aa6 1427 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1428 drand48() <
1429 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1430 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1431 "Corrupting group EAPOL-Key Key MIC");
1432 key->key_mic[0]++;
1433 }
1434#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1435 }
1436
1437 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1438 1);
1439 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1440 sm->pairwise_set);
1441 os_free(hdr);
1442}
1443
1444
1445static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1446 struct wpa_state_machine *sm, int key_info,
1447 const u8 *key_rsc, const u8 *nonce,
1448 const u8 *kde, size_t kde_len,
1449 int keyidx, int encr)
1450{
1451 int timeout_ms;
1452 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
bae61562 1453 int ctr;
6fc6879b
JM		 1454
1455 if (sm == NULL)
1456 return;
1457
1458 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1459 keyidx, encr, 0);
1460
bae61562 1461 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1462 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1463 timeout_ms = pairwise ? eapol_key_timeout_first :
1464 eapol_key_timeout_first_group;
bae61562
JM		 1465 else
1466 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1467 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1468 sm->pending_1_of_4_timeout = 1;
1469 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1470 "counter %d)", timeout_ms, ctr);
6fc6879b
JM		 1471 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1472 wpa_send_eapol_timeout, wpa_auth, sm);
1473}
1474
1475
1476static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1477{
1478 struct ieee802_1x_hdr *hdr;
1479 struct wpa_eapol_key *key;
1480 u16 key_info;
1481 int ret = 0;
1482 u8 mic[16];
1483
1484 if (data_len < sizeof(*hdr) + sizeof(*key))
1485 return -1;
1486
1487 hdr = (struct ieee802_1x_hdr *) data;
1488 key = (struct wpa_eapol_key *) (hdr + 1);
1489 key_info = WPA_GET_BE16(key->key_info);
1490 os_memcpy(mic, key->key_mic, 16);
1491 os_memset(key->key_mic, 0, 16);
1492 if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1493 data, data_len, key->key_mic) ||
870834a1 1494 os_memcmp_const(mic, key->key_mic, 16) != 0)
6fc6879b
JM		 1495 ret = -1;
1496 os_memcpy(key->key_mic, mic, 16);
1497 return ret;
1498}
1499
1500
1501void wpa_remove_ptk(struct wpa_state_machine *sm)
1502{
1503 sm->PTK_valid = FALSE;
1504 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
26083221 1505 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
6fc6879b 1506 sm->pairwise_set = FALSE;
581a8cde 1507 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1508}
1509
1510
6f9b5d16 1511int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
6fc6879b 1512{
5d22a1d5
JM		 1513 int remove_ptk = 1;
1514
6fc6879b 1515 if (sm == NULL)
6f9b5d16 1516 return -1;
6fc6879b
JM		 1517
1518 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1519 "event %d notification", event);
1520
1521 switch (event) {
1522 case WPA_AUTH:
1523 case WPA_ASSOC:
1524 break;
1525 case WPA_DEAUTH:
1526 case WPA_DISASSOC:
1527 sm->DeauthenticationRequest = TRUE;
1528 break;
1529 case WPA_REAUTH:
1530 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1531 if (!sm->started) {
1532 /*
1533 * When using WPS, we may end up here if the STA
1534 * manages to re-associate without the previous STA
1535 * entry getting removed. Consequently, we need to make
1536 * sure that the WPA state machines gets initialized
1537 * properly at this point.
1538 */
1539 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1540 "started - initialize now");
1541 sm->started = 1;
1542 sm->Init = TRUE;
1543 if (wpa_sm_step(sm) == 1)
1544 return 1; /* should not really happen */
1545 sm->Init = FALSE;
1546 sm->AuthenticationRequest = TRUE;
1547 break;
1548 }
9663596f
JM		 1549 if (sm->GUpdateStationKeys) {
1550 /*
1551 * Reauthentication cancels the pending group key
1552 * update for this STA.
1553 */
1554 sm->group->GKeyDoneStations--;
1555 sm->GUpdateStationKeys = FALSE;
1556 sm->PtkGroupInit = TRUE;
1557 }
6fc6879b
JM		 1558 sm->ReAuthenticationRequest = TRUE;
1559 break;
1560 case WPA_ASSOC_FT:
1561#ifdef CONFIG_IEEE80211R
81a658d7
JM		 1562 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1563 "after association");
1564 wpa_ft_install_ptk(sm);
1565
6fc6879b
JM		 1566 /* Using FT protocol, not WPA auth state machine */
1567 sm->ft_completed = 1;
6f9b5d16 1568 return 0;
6fc6879b
JM		 1569#else /* CONFIG_IEEE80211R */
1570 break;
1571#endif /* CONFIG_IEEE80211R */
1572 }
1573
1574#ifdef CONFIG_IEEE80211R
1575 sm->ft_completed = 0;
1576#endif /* CONFIG_IEEE80211R */
1577
5d22a1d5
JM		 1578#ifdef CONFIG_IEEE80211W
1579 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1580 remove_ptk = 0;
1581#endif /* CONFIG_IEEE80211W */
6fc6879b 1582
5d22a1d5
JM		 1583 if (remove_ptk) {
1584 sm->PTK_valid = FALSE;
1585 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1586
1587 if (event != WPA_REAUTH_EAPOL)
1588 wpa_remove_ptk(sm);
1589 }
6fc6879b 1590
6f9b5d16 1591 return wpa_sm_step(sm);
6fc6879b
JM		 1592}
1593
1594
6fc6879b
JM		 1595SM_STATE(WPA_PTK, INITIALIZE)
1596{
1597 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1598 if (sm->Init) {
1599 /* Init flag is not cleared here, so avoid busy
1600 * loop by claiming nothing changed. */
1601 sm->changed = FALSE;
1602 }
1603
1604 sm->keycount = 0;
1605 if (sm->GUpdateStationKeys)
1606 sm->group->GKeyDoneStations--;
1607 sm->GUpdateStationKeys = FALSE;
1608 if (sm->wpa == WPA_VERSION_WPA)
1609 sm->PInitAKeys = FALSE;
1610 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1611 * Local AA > Remote AA)) */) {
1612 sm->Pair = TRUE;
1613 }
1614 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1615 wpa_remove_ptk(sm);
1616 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1617 sm->TimeoutCtr = 0;
56586197 1618 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1619 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1620 WPA_EAPOL_authorized, 0);
1621 }
1622}
1623
1624
1625SM_STATE(WPA_PTK, DISCONNECT)
1626{
1627 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1628 sm->Disconnect = FALSE;
1629 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1630}
1631
1632
1633SM_STATE(WPA_PTK, DISCONNECTED)
1634{
1635 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1636 sm->DeauthenticationRequest = FALSE;
1637}
1638
1639
1640SM_STATE(WPA_PTK, AUTHENTICATION)
1641{
1642 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1643 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1644 sm->PTK_valid = FALSE;
1645 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1646 1);
1647 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1648 sm->AuthenticationRequest = FALSE;
1649}
1650
1651
40d00d2b
NC		 1652static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1653 struct wpa_group *group)
1bdb7ab3 1654{
40d00d2b
NC		 1655 if (group->first_sta_seen)
1656 return;
1bdb7ab3
JM		 1657 /*
1658 * System has run bit further than at the time hostapd was started
1659 * potentially very early during boot up. This provides better chances
1660 * of collecting more randomness on embedded systems. Re-initialize the
1661 * GMK and Counter here to improve their strength if there was not
1662 * enough entropy available immediately after system startup.
1663 */
1664 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1665 "station");
08704cd8
JM		 1666 if (random_pool_ready() != 1) {
1667 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1668 "to proceed - reject first 4-way handshake");
1669 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1670 } else {
1671 group->first_sta_seen = TRUE;
1672 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1673 }
40d00d2b 1674
1bdb7ab3
JM		 1675 wpa_group_init_gmk_and_counter(wpa_auth, group);
1676 wpa_gtk_update(wpa_auth, group);
1677 wpa_group_config_group_keys(wpa_auth, group);
1678}
1679
1680
6fc6879b
JM		 1681SM_STATE(WPA_PTK, AUTHENTICATION2)
1682{
1683 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1684
40d00d2b 1685 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1686 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1687
3825a19b
JM		 1688 /*
1689 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1690 * ambiguous. The Authenticator state machine uses a counter that is
1691 * incremented by one for each 4-way handshake. However, the security
1692 * analysis of 4-way handshake points out that unpredictable nonces
1693 * help in preventing precomputation attacks. Instead of the state
1694 * machine definition, use an unpredictable nonce value here to provide
1695 * stronger protection against potential precomputation attacks.
1696 */
1697 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1698 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1699 "ANonce.");
65a32cdb 1700 sm->Disconnect = TRUE;
3825a19b
JM		 1701 return;
1702 }
bc8318ac
JM		 1703 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1704 WPA_NONCE_LEN);
6fc6879b
JM		 1705 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1706 * logical place than INITIALIZE since AUTHENTICATION2 can be
1707 * re-entered on ReAuthenticationRequest without going through
1708 * INITIALIZE. */
1709 sm->TimeoutCtr = 0;
1710}
1711
1712
1713SM_STATE(WPA_PTK, INITPMK)
1714{
1715 u8 msk[2 * PMK_LEN];
1716 size_t len = 2 * PMK_LEN;
1717
1718 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1719#ifdef CONFIG_IEEE80211R
1720 sm->xxkey_len = 0;
1721#endif /* CONFIG_IEEE80211R */
1722 if (sm->pmksa) {
1723 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1724 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1725 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1726 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1727 "(len=%lu)", (unsigned long) len);
1728 os_memcpy(sm->PMK, msk, PMK_LEN);
1729#ifdef CONFIG_IEEE80211R
1730 if (len >= 2 * PMK_LEN) {
1731 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1732 sm->xxkey_len = PMK_LEN;
1733 }
1734#endif /* CONFIG_IEEE80211R */
1735 } else {
1736 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1737 }
1738
1739 sm->req_replay_counter_used = 0;
1740 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1741 * will break reauthentication since EAPOL state machines may not be
1742 * get into AUTHENTICATING state that clears keyRun before WPA state
1743 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1744 * state and takes PMK from the previously used AAA Key. This will
1745 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1746 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1747 * be good workaround for this issue. */
1748 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1749}
1750
1751
1752SM_STATE(WPA_PTK, INITPSK)
1753{
1754 const u8 *psk;
1755 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
759fd76b 1756 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
6fc6879b
JM		 1757 if (psk) {
1758 os_memcpy(sm->PMK, psk, PMK_LEN);
1759#ifdef CONFIG_IEEE80211R
1760 os_memcpy(sm->xxkey, psk, PMK_LEN);
1761 sm->xxkey_len = PMK_LEN;
1762#endif /* CONFIG_IEEE80211R */
1763 }
1764 sm->req_replay_counter_used = 0;
1765}
1766
1767
1768SM_STATE(WPA_PTK, PTKSTART)
1769{
1770 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1771 size_t pmkid_len = 0;
1772
1773 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1774 sm->PTKRequest = FALSE;
1775 sm->TimeoutEvt = FALSE;
bae61562
JM		 1776
1777 sm->TimeoutCtr++;
1778 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1779 /* No point in sending the EAPOL-Key - we will disconnect
1780 * immediately following this. */
1781 return;
1782 }
1783
6fc6879b
JM		 1784 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1785 "sending 1/4 msg of 4-Way Handshake");
1786 /*
1787 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1788 * one possible PSK for this STA.
1789 */
1790 if (sm->wpa == WPA_VERSION_WPA2 &&
a14896e8
JM		 1791 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1792 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 1793 pmkid = buf;
1794 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1795 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1796 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1797 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1798 if (sm->pmksa)
1799 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1800 sm->pmksa->pmkid, PMKID_LEN);
1801 else {
1802 /*
1803 * Calculate PMKID since no PMKSA cache entry was
1804 * available with pre-calculated PMKID.
1805 */
1806 rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
56586197
JM		 1807 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1808 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1809 }
1810 }
1811 wpa_send_eapol(sm->wpa_auth, sm,
1812 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1813 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 1814}
1815
1816
1817static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1818 struct wpa_ptk *ptk)
1819{
3b9c5176 1820 size_t ptk_len = wpa_cipher_key_len(sm->pairwise) + 32;
6fc6879b 1821#ifdef CONFIG_IEEE80211R
56586197 1822 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
c0a61908 1823 return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
6fc6879b
JM		 1824#endif /* CONFIG_IEEE80211R */
1825
1826 wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1827 sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
c0a61908 1828 (u8 *) ptk, ptk_len,
56586197 1829 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 1830
1831 return 0;
1832}
1833
1834
1835SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1836{
1837 struct wpa_ptk PTK;
1838 int ok = 0;
1839 const u8 *pmk = NULL;
1840
1841 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1842 sm->EAPOLKeyReceived = FALSE;
68921e24 1843 sm->update_snonce = FALSE;
6fc6879b
JM		 1844
1845 /* WPA with IEEE 802.1X: use the derived PMK from EAP
1846 * WPA-PSK: iterate through possible PSKs and select the one matching
1847 * the packet */
1848 for (;;) {
56586197 1849 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
759fd76b
JM		 1850 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
1851 sm->p2p_dev_addr, pmk);
6fc6879b
JM		 1852 if (pmk == NULL)
1853 break;
1854 } else
1855 pmk = sm->PMK;
1856
1857 wpa_derive_ptk(sm, pmk, &PTK);
1858
1859 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1860 sm->last_rx_eapol_key_len) == 0) {
1861 ok = 1;
1862 break;
1863 }
1864
56586197 1865 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 1866 break;
1867 }
1868
1869 if (!ok) {
1870 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1871 "invalid MIC in msg 2/4 of 4-Way Handshake");
1872 return;
1873 }
1874
26e23750
JM		 1875#ifdef CONFIG_IEEE80211R
1876 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1877 /*
1878 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
1879 * with the value we derived.
1880 */
870834a1
JM		 1881 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
1882 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 1883 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1884 "PMKR1Name mismatch in FT 4-way "
1885 "handshake");
1886 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
1887 "Supplicant",
1888 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
1889 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
1890 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
1891 return;
1892 }
1893 }
1894#endif /* CONFIG_IEEE80211R */
1895
e4bf4db9 1896 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1897 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1898
56586197 1899 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1900 /* PSK may have changed from the previous choice, so update
1901 * state machine data based on whatever PSK was selected here.
1902 */
1903 os_memcpy(sm->PMK, pmk, PMK_LEN);
1904 }
1905
1906 sm->MICVerified = TRUE;
1907
1908 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1909 sm->PTK_valid = TRUE;
1910}
1911
1912
1913SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1914{
1915 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1916 sm->TimeoutCtr = 0;
1917}
1918
1919
1920#ifdef CONFIG_IEEE80211W
1921
1922static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1923{
1924 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 1925 size_t len;
1926 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
1927 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 1928 }
1929
1930 return 0;
1931}
1932
1933
1934static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1935{
1936 struct wpa_igtk_kde igtk;
1937 struct wpa_group *gsm = sm->group;
03610ad2 1938 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 1939 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 1940
1941 if (!sm->mgmt_frame_prot)
1942 return pos;
1943
1944 igtk.keyid[0] = gsm->GN_igtk;
1945 igtk.keyid[1] = 0;
7b1080da 1946 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 1947 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 1948 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 1949 else
1950 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 1951 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
83421850
JM		 1952 if (sm->wpa_auth->conf.disable_gtk) {
1953 /*
1954 * Provide unique random IGTK to each STA to prevent use of
1955 * IGTK in the BSS.
1956 */
8dd9f9cd 1957 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 1958 return pos;
1959 }
6fc6879b 1960 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 1961 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
1962 NULL, 0);
6fc6879b
JM		 1963
1964 return pos;
1965}
1966
1967#else /* CONFIG_IEEE80211W */
1968
1969static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1970{
1971 return 0;
1972}
1973
1974
1975static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1976{
1977 return pos;
1978}
1979
1980#endif /* CONFIG_IEEE80211W */
1981
1982
1983SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1984{
83421850 1985 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 1986 size_t gtk_len, kde_len;
1987 struct wpa_group *gsm = sm->group;
1988 u8 *wpa_ie;
1989 int wpa_ie_len, secure, keyidx, encr = 0;
1990
1991 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1992 sm->TimeoutEvt = FALSE;
bae61562
JM		 1993
1994 sm->TimeoutCtr++;
1995 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1996 /* No point in sending the EAPOL-Key - we will disconnect
1997 * immediately following this. */
1998 return;
1999 }
2000
86dfabb8
JM		 2001 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2002 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2003 */
2004 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2005 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2006 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2007 wpa_ie = sm->wpa_auth->wpa_ie;
2008 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2009 if (sm->wpa == WPA_VERSION_WPA &&
2010 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2011 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
2012 /* WPA-only STA, remove RSN IE */
2013 wpa_ie = wpa_ie + wpa_ie[1] + 2;
2014 wpa_ie_len = wpa_ie[1] + 2;
2015 }
2016 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2017 "sending 3/4 msg of 4-Way Handshake");
2018 if (sm->wpa == WPA_VERSION_WPA2) {
2019 /* WPA2 send GTK in the 4-way handshake */
2020 secure = 1;
2021 gtk = gsm->GTK[gsm->GN - 1];
2022 gtk_len = gsm->GTK_len;
83421850
JM		 2023 if (sm->wpa_auth->conf.disable_gtk) {
2024 /*
2025 * Provide unique random GTK to each STA to prevent use
2026 * of GTK in the BSS.
2027 */
2028 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2029 return;
2030 gtk = dummy_gtk;
2031 }
6fc6879b
JM		 2032 keyidx = gsm->GN;
2033 _rsc = rsc;
2034 encr = 1;
2035 } else {
2036 /* WPA does not include GTK in msg 3/4 */
2037 secure = 0;
2038 gtk = NULL;
2039 gtk_len = 0;
2040 keyidx = 0;
2041 _rsc = NULL;
0d442aff
JM		 2042 if (sm->rx_eapol_key_secure) {
2043 /*
2044 * It looks like Windows 7 supplicant tries to use
2045 * Secure bit in msg 2/4 after having reported Michael
2046 * MIC failure and it then rejects the 4-way handshake
2047 * if msg 3/4 does not set Secure bit. Work around this
2048 * by setting the Secure bit here even in the case of
2049 * WPA if the supplicant used it first.
2050 */
2051 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2052 "STA used Secure bit in WPA msg 2/4 - "
2053 "set Secure for 3/4 as workaround");
0d442aff
JM		 2054 secure = 1;
2055 }
6fc6879b
JM		 2056 }
2057
2058 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2059 if (gtk)
2060 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
26e23750 2061#ifdef CONFIG_IEEE80211R
86dfabb8
JM		 2062 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2063 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2064 kde_len += 300; /* FTIE + 2 * TIE */
2065 }
26e23750 2066#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 2067#ifdef CONFIG_P2P
2068 if (WPA_GET_BE32(sm->ip_addr) > 0)
2069 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2070#endif /* CONFIG_P2P */
6fc6879b
JM		 2071 kde = os_malloc(kde_len);
2072 if (kde == NULL)
2073 return;
2074
2075 pos = kde;
2076 os_memcpy(pos, wpa_ie, wpa_ie_len);
2077 pos += wpa_ie_len;
26e23750
JM		 2078#ifdef CONFIG_IEEE80211R
2079 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2080 int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
2081 if (res < 0) {
2082 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2083 "PMKR1Name into RSN IE in EAPOL-Key data");
2084 os_free(kde);
2085 return;
2086 }
2087 pos += res;
2088 }
2089#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 2090 if (gtk) {
2091 u8 hdr[2];
2092 hdr[0] = keyidx & 0x03;
2093 hdr[1] = 0;
2094 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2095 gtk, gtk_len);
2096 }
2097 pos = ieee80211w_kde_add(sm, pos);
2098
86dfabb8
JM		 2099#ifdef CONFIG_IEEE80211R
2100 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2101 int res;
2102 struct wpa_auth_config *conf;
2103
2104 conf = &sm->wpa_auth->conf;
2105 res = wpa_write_ftie(conf, conf->r0_key_holder,
2106 conf->r0_key_holder_len,
2107 NULL, NULL, pos, kde + kde_len - pos,
2108 NULL, 0);
2109 if (res < 0) {
2110 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2111 "into EAPOL-Key Key Data");
2112 os_free(kde);
2113 return;
2114 }
2115 pos += res;
2116
2117 /* TIE[ReassociationDeadline] (TU) */
2118 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2119 *pos++ = 5;
2120 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2121 WPA_PUT_LE32(pos, conf->reassociation_deadline);
2122 pos += 4;
2123
2124 /* TIE[KeyLifetime] (seconds) */
2125 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2126 *pos++ = 5;
2127 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2128 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2129 pos += 4;
2130 }
2131#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 2132#ifdef CONFIG_P2P
2133 if (WPA_GET_BE32(sm->ip_addr) > 0) {
2134 u8 addr[3 * 4];
2135 os_memcpy(addr, sm->ip_addr, 4);
2136 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2137 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2138 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2139 addr, sizeof(addr), NULL, 0);
2140 }
2141#endif /* CONFIG_P2P */
86dfabb8 2142
6fc6879b
JM		 2143 wpa_send_eapol(sm->wpa_auth, sm,
2144 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
2145 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2146 WPA_KEY_INFO_KEY_TYPE,
2147 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2148 os_free(kde);
6fc6879b
JM		 2149}
2150
2151
2152SM_STATE(WPA_PTK, PTKINITDONE)
2153{
2154 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2155 sm->EAPOLKeyReceived = FALSE;
2156 if (sm->Pair) {
c3550295
JM		 2157 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2158 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b
JM		 2159 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2160 sm->PTK.tk1, klen)) {
2161 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2162 return;
2163 }
2164 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2165 sm->pairwise_set = TRUE;
2166
581a8cde
JM		 2167 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2168 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2169 eloop_register_timeout(sm->wpa_auth->conf.
2170 wpa_ptk_rekey, 0, wpa_rekey_ptk,
2171 sm->wpa_auth, sm);
2172 }
2173
56586197 2174 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2175 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2176 WPA_EAPOL_authorized, 1);
2177 }
2178 }
2179
2180 if (0 /* IBSS == TRUE */) {
2181 sm->keycount++;
2182 if (sm->keycount == 2) {
2183 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2184 WPA_EAPOL_portValid, 1);
2185 }
2186 } else {
2187 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2188 1);
2189 }
2190 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2191 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2192 if (sm->wpa == WPA_VERSION_WPA)
2193 sm->PInitAKeys = TRUE;
2194 else
2195 sm->has_GTK = TRUE;
2196 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2197 "pairwise key handshake completed (%s)",
2198 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2199
2200#ifdef CONFIG_IEEE80211R
2201 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2202#endif /* CONFIG_IEEE80211R */
2203}
2204
2205
2206SM_STEP(WPA_PTK)
2207{
2208 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2209
2210 if (sm->Init)
2211 SM_ENTER(WPA_PTK, INITIALIZE);
2212 else if (sm->Disconnect
1aae01fc
BG		 2213 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2214 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2215 "WPA_PTK: sm->Disconnect");
6fc6879b 2216 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 2217 }
6fc6879b
JM		 2218 else if (sm->DeauthenticationRequest)
2219 SM_ENTER(WPA_PTK, DISCONNECTED);
2220 else if (sm->AuthenticationRequest)
2221 SM_ENTER(WPA_PTK, AUTHENTICATION);
2222 else if (sm->ReAuthenticationRequest)
2223 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2224 else if (sm->PTKRequest)
2225 SM_ENTER(WPA_PTK, PTKSTART);
2226 else switch (sm->wpa_ptk_state) {
2227 case WPA_PTK_INITIALIZE:
2228 break;
2229 case WPA_PTK_DISCONNECT:
2230 SM_ENTER(WPA_PTK, DISCONNECTED);
2231 break;
2232 case WPA_PTK_DISCONNECTED:
2233 SM_ENTER(WPA_PTK, INITIALIZE);
2234 break;
2235 case WPA_PTK_AUTHENTICATION:
2236 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2237 break;
2238 case WPA_PTK_AUTHENTICATION2:
56586197 2239 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 2240 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2241 WPA_EAPOL_keyRun) > 0)
2242 SM_ENTER(WPA_PTK, INITPMK);
56586197 2243 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 2244 /* FIX: && 802.1X::keyRun */)
2245 SM_ENTER(WPA_PTK, INITPSK);
2246 break;
2247 case WPA_PTK_INITPMK:
2248 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2249 WPA_EAPOL_keyAvailable) > 0)
2250 SM_ENTER(WPA_PTK, PTKSTART);
2251 else {
2252 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2253 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2254 "INITPMK - keyAvailable = false");
6fc6879b
JM		 2255 SM_ENTER(WPA_PTK, DISCONNECT);
2256 }
2257 break;
2258 case WPA_PTK_INITPSK:
759fd76b
JM		 2259 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2260 NULL))
6fc6879b
JM		 2261 SM_ENTER(WPA_PTK, PTKSTART);
2262 else {
2263 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2264 "no PSK configured for the STA");
2265 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2266 SM_ENTER(WPA_PTK, DISCONNECT);
2267 }
2268 break;
2269 case WPA_PTK_PTKSTART:
2270 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2271 sm->EAPOLKeyPairwise)
2272 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2273 else if (sm->TimeoutCtr >
2274 (int) dot11RSNAConfigPairwiseUpdateCount) {
2275 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2276 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2277 "PTKSTART: Retry limit %d reached",
2278 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2279 SM_ENTER(WPA_PTK, DISCONNECT);
2280 } else if (sm->TimeoutEvt)
2281 SM_ENTER(WPA_PTK, PTKSTART);
2282 break;
2283 case WPA_PTK_PTKCALCNEGOTIATING:
2284 if (sm->MICVerified)
2285 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2286 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2287 sm->EAPOLKeyPairwise)
2288 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2289 else if (sm->TimeoutEvt)
2290 SM_ENTER(WPA_PTK, PTKSTART);
2291 break;
2292 case WPA_PTK_PTKCALCNEGOTIATING2:
2293 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2294 break;
2295 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 2296 if (sm->update_snonce)
2297 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2298 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2299 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 2300 SM_ENTER(WPA_PTK, PTKINITDONE);
2301 else if (sm->TimeoutCtr >
2302 (int) dot11RSNAConfigPairwiseUpdateCount) {
2303 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2304 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2305 "PTKINITNEGOTIATING: Retry limit %d "
2306 "reached",
2307 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2308 SM_ENTER(WPA_PTK, DISCONNECT);
2309 } else if (sm->TimeoutEvt)
2310 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2311 break;
2312 case WPA_PTK_PTKINITDONE:
2313 break;
2314 }
2315}
2316
2317
2318SM_STATE(WPA_PTK_GROUP, IDLE)
2319{
2320 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2321 if (sm->Init) {
2322 /* Init flag is not cleared here, so avoid busy
2323 * loop by claiming nothing changed. */
2324 sm->changed = FALSE;
2325 }
2326 sm->GTimeoutCtr = 0;
2327}
2328
2329
2330SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2331{
2332 u8 rsc[WPA_KEY_RSC_LEN];
2333 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 2334 const u8 *kde;
2335 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 2336 size_t kde_len;
83421850 2337 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 2338
2339 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 2340
2341 sm->GTimeoutCtr++;
2342 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2343 /* No point in sending the EAPOL-Key - we will disconnect
2344 * immediately following this. */
2345 return;
2346 }
2347
6fc6879b
JM		 2348 if (sm->wpa == WPA_VERSION_WPA)
2349 sm->PInitAKeys = FALSE;
2350 sm->TimeoutEvt = FALSE;
2351 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2352 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2353 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2354 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2355 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2356 "sending 1/2 msg of Group Key Handshake");
2357
83421850
JM		 2358 gtk = gsm->GTK[gsm->GN - 1];
2359 if (sm->wpa_auth->conf.disable_gtk) {
2360 /*
2361 * Provide unique random GTK to each STA to prevent use
2362 * of GTK in the BSS.
2363 */
2364 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
2365 return;
2366 gtk = dummy_gtk;
2367 }
6fc6879b
JM		 2368 if (sm->wpa == WPA_VERSION_WPA2) {
2369 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2370 ieee80211w_kde_len(sm);
e41e4f9e
JM		 2371 kde_buf = os_malloc(kde_len);
2372 if (kde_buf == NULL)
6fc6879b
JM		 2373 return;
2374
e41e4f9e 2375 kde = pos = kde_buf;
6fc6879b
JM		 2376 hdr[0] = gsm->GN & 0x03;
2377 hdr[1] = 0;
2378 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 2379 gtk, gsm->GTK_len);
6fc6879b 2380 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 2381 kde_len = pos - kde;
6fc6879b 2382 } else {
83421850 2383 kde = gtk;
e41e4f9e 2384 kde_len = gsm->GTK_len;
6fc6879b
JM		 2385 }
2386
2387 wpa_send_eapol(sm->wpa_auth, sm,
2388 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2389 WPA_KEY_INFO_ACK |
2390 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
e41e4f9e
JM		 2391 rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1);
2392
2393 os_free(kde_buf);
6fc6879b
JM		 2394}
2395
2396
2397SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2398{
2399 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2400 sm->EAPOLKeyReceived = FALSE;
2401 if (sm->GUpdateStationKeys)
2402 sm->group->GKeyDoneStations--;
2403 sm->GUpdateStationKeys = FALSE;
2404 sm->GTimeoutCtr = 0;
2405 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2406 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2407 "group key handshake completed (%s)",
2408 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2409 sm->has_GTK = TRUE;
2410}
2411
2412
2413SM_STATE(WPA_PTK_GROUP, KEYERROR)
2414{
2415 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2416 if (sm->GUpdateStationKeys)
2417 sm->group->GKeyDoneStations--;
2418 sm->GUpdateStationKeys = FALSE;
2419 sm->Disconnect = TRUE;
2420}
2421
2422
2423SM_STEP(WPA_PTK_GROUP)
2424{
9663596f 2425 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 2426 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 2427 sm->PtkGroupInit = FALSE;
2428 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 2429 case WPA_PTK_GROUP_IDLE:
2430 if (sm->GUpdateStationKeys ||
2431 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2432 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2433 break;
2434 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2435 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2436 !sm->EAPOLKeyPairwise && sm->MICVerified)
2437 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2438 else if (sm->GTimeoutCtr >
2439 (int) dot11RSNAConfigGroupUpdateCount)
2440 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2441 else if (sm->TimeoutEvt)
2442 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2443 break;
2444 case WPA_PTK_GROUP_KEYERROR:
2445 SM_ENTER(WPA_PTK_GROUP, IDLE);
2446 break;
2447 case WPA_PTK_GROUP_REKEYESTABLISHED:
2448 SM_ENTER(WPA_PTK_GROUP, IDLE);
2449 break;
2450 }
2451}
2452
2453
2454static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2455 struct wpa_group *group)
2456{
2457 int ret = 0;
2458
6fc6879b
JM		 2459 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2460 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2461 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2462 wpa_auth->addr, group->GNonce,
2463 group->GTK[group->GN - 1], group->GTK_len) < 0)
2464 ret = -1;
5cb9d5c3
JM		 2465 wpa_hexdump_key(MSG_DEBUG, "GTK",
2466 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 2467
2468#ifdef CONFIG_IEEE80211W
70f8cc8e 2469 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 2470 size_t len;
2471 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 2472 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2473 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2474 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2475 wpa_auth->addr, group->GNonce,
8dd9f9cd 2476 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 2477 ret = -1;
6fc6879b 2478 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 2479 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 2480 }
2481#endif /* CONFIG_IEEE80211W */
2482
2483 return ret;
2484}
2485
2486
2487static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2488 struct wpa_group *group)
2489{
2490 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2491 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2492 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2493 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2494
2495 /* GTK[0..N] = 0 */
2496 os_memset(group->GTK, 0, sizeof(group->GTK));
2497 group->GN = 1;
2498 group->GM = 2;
2499#ifdef CONFIG_IEEE80211W
2500 group->GN_igtk = 4;
2501 group->GM_igtk = 5;
2502#endif /* CONFIG_IEEE80211W */
2503 /* GTK[GN] = CalcGTK() */
2504 wpa_gtk_update(wpa_auth, group);
2505}
2506
2507
2508static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2509{
473b6f22
MB		 2510 if (ctx != NULL && ctx != sm->group)
2511 return 0;
2512
6fc6879b
JM		 2513 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2514 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2515 "Not in PTKINITDONE; skip Group Key update");
3c183894 2516 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 2517 return 0;
2518 }
9663596f
JM		 2519 if (sm->GUpdateStationKeys) {
2520 /*
3c183894
JM		 2521 * This should not really happen, so add a debug log entry.
2522 * Since we clear the GKeyDoneStations before the loop, the
2523 * station needs to be counted here anyway.
9663596f
JM		 2524 */
2525 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 2526 "GUpdateStationKeys was already set when "
2527 "marking station for GTK rekeying");
9663596f 2528 }
3c183894 2529
ad3872a3 2530 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 2531 if (sm->is_wnmsleep)
2532 return 0;
d32d94db 2533
3c183894
JM		 2534 sm->group->GKeyDoneStations++;
2535 sm->GUpdateStationKeys = TRUE;
2536
6fc6879b
JM		 2537 wpa_sm_step(sm);
2538 return 0;
2539}
2540
2541
ad3872a3
JM		 2542#ifdef CONFIG_WNM
2543/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 2544void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
2545{
629edfef 2546 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 2547 return;
2548
2549 wpa_group_update_sta(sm, NULL);
2550}
2551
2552
2553void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
2554{
629edfef
JM		 2555 if (sm)
2556 sm->is_wnmsleep = !!flag;
d32d94db
XC		 2557}
2558
2559
2560int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2561{
d32d94db 2562 struct wpa_group *gsm = sm->group;
835822d4 2563 u8 *start = pos;
d32d94db
XC		 2564
2565 /*
835822d4 2566 * GTK subelement:
d32d94db 2567 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 2568 * Key[5..32]
d32d94db 2569 */
835822d4
JM		 2570 *pos++ = WNM_SLEEP_SUBELEM_GTK;
2571 *pos++ = 11 + gsm->GTK_len;
d32d94db 2572 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 2573 WPA_PUT_LE16(pos, gsm->GN & 0x03);
2574 pos += 2;
2575 *pos++ = gsm->GTK_len;
2576 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 2577 return 0;
835822d4
JM		 2578 pos += 8;
2579 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2580 pos += gsm->GTK_len;
d32d94db 2581
835822d4
JM		 2582 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
2583 gsm->GN);
2584 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 2585 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 2586
835822d4 2587 return pos - start;
d32d94db
XC		 2588}
2589
2590
2591#ifdef CONFIG_IEEE80211W
2592int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2593{
d32d94db 2594 struct wpa_group *gsm = sm->group;
835822d4 2595 u8 *start = pos;
8dd9f9cd 2596 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 2597
835822d4
JM		 2598 /*
2599 * IGTK subelement:
2600 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
2601 */
2602 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 2603 *pos++ = 2 + 6 + len;
835822d4
JM		 2604 WPA_PUT_LE16(pos, gsm->GN_igtk);
2605 pos += 2;
2606 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 2607 return 0;
835822d4 2608 pos += 6;
d32d94db 2609
8dd9f9cd
JM		 2610 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
2611 pos += len;
d32d94db 2612
835822d4
JM		 2613 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
2614 gsm->GN_igtk);
2615 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 2616 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 2617
835822d4 2618 return pos - start;
d32d94db
XC		 2619}
2620#endif /* CONFIG_IEEE80211W */
ad3872a3 2621#endif /* CONFIG_WNM */
d32d94db
XC		 2622
2623
6fc6879b
JM		 2624static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2625 struct wpa_group *group)
2626{
2627 int tmp;
2628
2629 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2630 "SETKEYS (VLAN-ID %d)", group->vlan_id);
2631 group->changed = TRUE;
2632 group->wpa_group_state = WPA_GROUP_SETKEYS;
2633 group->GTKReKey = FALSE;
2634 tmp = group->GM;
2635 group->GM = group->GN;
2636 group->GN = tmp;
2637#ifdef CONFIG_IEEE80211W
2638 tmp = group->GM_igtk;
2639 group->GM_igtk = group->GN_igtk;
2640 group->GN_igtk = tmp;
2641#endif /* CONFIG_IEEE80211W */
2642 /* "GKeyDoneStations = GNoStations" is done in more robust way by
2643 * counting the STAs that are marked with GUpdateStationKeys instead of
2644 * including all STAs that could be in not-yet-completed state. */
2645 wpa_gtk_update(wpa_auth, group);
2646
3c183894
JM		 2647 if (group->GKeyDoneStations) {
2648 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2649 "GKeyDoneStations=%d when starting new GTK rekey",
2650 group->GKeyDoneStations);
2651 group->GKeyDoneStations = 0;
2652 }
473b6f22 2653 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 2654 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2655 group->GKeyDoneStations);
2656}
2657
2658
1bdb7ab3
JM		 2659static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2660 struct wpa_group *group)
6fc6879b 2661{
3c7302c2
JM		 2662 int ret = 0;
2663
3c7302c2 2664 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 2665 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 2666 broadcast_ether_addr, group->GN,
2667 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 2668 ret = -1;
6fc6879b
JM		 2669
2670#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 2671 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2672 enum wpa_alg alg;
2673 size_t len;
2674
2675 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
2676 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2677
2678 if (ret == 0 &&
2679 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
2680 broadcast_ether_addr, group->GN_igtk,
2681 group->IGTK[group->GN_igtk - 4], len) < 0)
2682 ret = -1;
2683 }
6fc6879b 2684#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 2685
2686 return ret;
6fc6879b
JM		 2687}
2688
2689
7d7f7be2
JM		 2690static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
2691{
2692 if (sm->group == ctx) {
2693 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
2694 " for discconnection due to fatal failure",
2695 MAC2STR(sm->addr));
2696 sm->Disconnect = TRUE;
2697 }
2698
2699 return 0;
2700}
2701
2702
2703static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
2704 struct wpa_group *group)
2705{
2706 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
2707 group->changed = TRUE;
2708 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
2709 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
2710}
2711
2712
1bdb7ab3
JM		 2713static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2714 struct wpa_group *group)
2715{
2716 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2717 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2718 group->changed = TRUE;
2719 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2720
7d7f7be2
JM		 2721 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
2722 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 2723 return -1;
7d7f7be2 2724 }
1bdb7ab3
JM		 2725
2726 return 0;
2727}
2728
2729
6fc6879b
JM		 2730static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2731 struct wpa_group *group)
2732{
2733 if (group->GInit) {
2734 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 2735 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
2736 /* Do not allow group operations */
6fc6879b
JM		 2737 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2738 group->GTKAuthenticator) {
2739 wpa_group_setkeysdone(wpa_auth, group);
2740 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2741 group->GTKReKey) {
2742 wpa_group_setkeys(wpa_auth, group);
2743 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2744 if (group->GKeyDoneStations == 0)
2745 wpa_group_setkeysdone(wpa_auth, group);
2746 else if (group->GTKReKey)
2747 wpa_group_setkeys(wpa_auth, group);
2748 }
2749}
2750
2751
e4a6ea1d 2752static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 2753{
2754 if (sm == NULL)
e4a6ea1d 2755 return 0;
6fc6879b
JM		 2756
2757 if (sm->in_step_loop) {
2758 /* This should not happen, but if it does, make sure we do not
2759 * end up freeing the state machine too early by exiting the
2760 * recursive call. */
2761 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 2762 return 0;
6fc6879b
JM		 2763 }
2764
2765 sm->in_step_loop = 1;
2766 do {
2767 if (sm->pending_deinit)
2768 break;
2769
2770 sm->changed = FALSE;
2771 sm->wpa_auth->group->changed = FALSE;
2772
2773 SM_STEP_RUN(WPA_PTK);
2774 if (sm->pending_deinit)
2775 break;
2776 SM_STEP_RUN(WPA_PTK_GROUP);
2777 if (sm->pending_deinit)
2778 break;
2779 wpa_group_sm_step(sm->wpa_auth, sm->group);
2780 } while (sm->changed || sm->wpa_auth->group->changed);
2781 sm->in_step_loop = 0;
2782
2783 if (sm->pending_deinit) {
2784 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2785 "machine deinit for " MACSTR, MAC2STR(sm->addr));
2786 wpa_free_sta_sm(sm);
e4a6ea1d 2787 return 1;
6fc6879b 2788 }
e4a6ea1d 2789 return 0;
6fc6879b
JM		 2790}
2791
2792
2793static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2794{
2795 struct wpa_state_machine *sm = eloop_ctx;
2796 wpa_sm_step(sm);
2797}
2798
2799
2800void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2801{
2802 if (sm == NULL)
2803 return;
2804 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2805}
2806
2807
2808void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2809{
2810 int tmp, i;
2811 struct wpa_group *group;
2812
2813 if (wpa_auth == NULL)
2814 return;
2815
2816 group = wpa_auth->group;
2817
2818 for (i = 0; i < 2; i++) {
2819 tmp = group->GM;
2820 group->GM = group->GN;
2821 group->GN = tmp;
2822#ifdef CONFIG_IEEE80211W
2823 tmp = group->GM_igtk;
2824 group->GM_igtk = group->GN_igtk;
2825 group->GN_igtk = tmp;
2826#endif /* CONFIG_IEEE80211W */
2827 wpa_gtk_update(wpa_auth, group);
9354e594 2828 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 2829 }
2830}
2831
2832
2833static const char * wpa_bool_txt(int bool)
2834{
2835 return bool ? "TRUE" : "FALSE";
2836}
2837
2838
6fc6879b
JM		 2839#define RSN_SUITE "%02x-%02x-%02x-%d"
2840#define RSN_SUITE_ARG(s) \
2841((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2842
2843int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2844{
2845 int len = 0, ret;
2846 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 2847#ifdef CONFIG_RSN_PREAUTH
2848 const int preauth = 1;
2849#else /* CONFIG_RSN_PREAUTH */
2850 const int preauth = 0;
2851#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 2852
2853 if (wpa_auth == NULL)
2854 return len;
2855
2856 ret = os_snprintf(buf + len, buflen - len,
2857 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 2858 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 2859 "dot11RSNAEnabled=%s\n"
2860 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 2861 wpa_bool_txt(preauth),
6fc6879b
JM		 2862 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2863 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2864 if (ret < 0 || (size_t) ret >= buflen - len)
2865 return len;
2866 len += ret;
2867
2868 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2869 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2870
2871 ret = os_snprintf(
2872 buf + len, buflen - len,
2873 "dot11RSNAConfigVersion=%u\n"
2874 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2875 /* FIX: dot11RSNAConfigGroupCipher */
2876 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2877 /* FIX: dot11RSNAConfigGroupRekeyTime */
2878 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2879 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2880 "dot11RSNAConfigGroupUpdateCount=%u\n"
2881 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2882 "dot11RSNAConfigGroupCipherSize=%u\n"
2883 "dot11RSNAConfigPMKLifetime=%u\n"
2884 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2885 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2886 "dot11RSNAConfigSATimeout=%u\n"
2887 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2888 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2889 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2890 "dot11RSNAPMKIDUsed=%s\n"
2891 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2892 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2893 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2894 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2895 "dot11RSNA4WayHandshakeFailures=%u\n"
2896 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2897 RSN_VERSION,
2898 !!wpa_auth->conf.wpa_strict_rekey,
2899 dot11RSNAConfigGroupUpdateCount,
2900 dot11RSNAConfigPairwiseUpdateCount,
c3550295 2901 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 2902 dot11RSNAConfigPMKLifetime,
2903 dot11RSNAConfigPMKReauthThreshold,
2904 dot11RSNAConfigSATimeout,
2905 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2906 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2907 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2908 pmkid_txt,
2909 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2910 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2911 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2912 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2913 wpa_auth->dot11RSNA4WayHandshakeFailures);
2914 if (ret < 0 || (size_t) ret >= buflen - len)
2915 return len;
2916 len += ret;
2917
2918 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2919 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2920
2921 /* Private MIB */
2922 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2923 wpa_auth->group->wpa_group_state);
2924 if (ret < 0 || (size_t) ret >= buflen - len)
2925 return len;
2926 len += ret;
2927
2928 return len;
2929}
2930
2931
2932int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2933{
2934 int len = 0, ret;
2935 u32 pairwise = 0;
2936
2937 if (sm == NULL)
2938 return 0;
2939
2940 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2941
2942 /* dot11RSNAStatsEntry */
2943
c3550295
JM		 2944 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
2945 WPA_PROTO_RSN : WPA_PROTO_WPA,
2946 sm->pairwise);
2947 if (pairwise == 0)
6fc6879b
JM		 2948 return 0;
2949
2950 ret = os_snprintf(
2951 buf + len, buflen - len,
2952 /* TODO: dot11RSNAStatsIndex */
2953 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2954 "dot11RSNAStatsVersion=1\n"
2955 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2956 /* TODO: dot11RSNAStatsTKIPICVErrors */
2957 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 2958 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 2959 /* TODO: dot11RSNAStatsCCMPReplays */
2960 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2961 /* TODO: dot11RSNAStatsTKIPReplays */,
2962 MAC2STR(sm->addr),
2963 RSN_SUITE_ARG(pairwise),
2964 sm->dot11RSNAStatsTKIPLocalMICFailures,
2965 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2966 if (ret < 0 || (size_t) ret >= buflen - len)
2967 return len;
2968 len += ret;
2969
2970 /* Private MIB */
2971 ret = os_snprintf(buf + len, buflen - len,
2972 "hostapdWPAPTKState=%d\n"
2973 "hostapdWPAPTKGroupState=%d\n",
2974 sm->wpa_ptk_state,
2975 sm->wpa_ptk_group_state);
2976 if (ret < 0 || (size_t) ret >= buflen - len)
2977 return len;
2978 len += ret;
2979
2980 return len;
2981}
2982
2983
2984void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2985{
2986 if (wpa_auth)
2987 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2988}
2989
2990
2991int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2992{
2993 return sm && sm->pairwise_set;
2994}
2995
2996
ff36ff00
JM		 2997int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2998{
2999 return sm->pairwise;
3000}
3001
3002
6fc6879b
JM		 3003int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3004{
3005 if (sm == NULL)
3006 return -1;
3007 return sm->wpa_key_mgmt;
3008}
3009
3010
3011int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3012{
3013 if (sm == NULL)
3014 return 0;
3015 return sm->wpa;
3016}
3017
3018
3019int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3020 struct rsn_pmksa_cache_entry *entry)
3021{
3022 if (sm == NULL || sm->pmksa != entry)
3023 return -1;
3024 sm->pmksa = NULL;
3025 return 0;
3026}
3027
3028
3029struct rsn_pmksa_cache_entry *
3030wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3031{
3032 return sm ? sm->pmksa : NULL;
3033}
3034
3035
3036void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3037{
3038 if (sm)
3039 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3040}
3041
3042
3043const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3044{
3045 if (wpa_auth == NULL)
3046 return NULL;
3047 *len = wpa_auth->wpa_ie_len;
3048 return wpa_auth->wpa_ie;
3049}
3050
3051
3052int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
3053 int session_timeout, struct eapol_state_machine *eapol)
3054{
cb465555
JM		 3055 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3056 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 3057 return -1;
3058
4bb081f1 3059 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
087a1f4e 3060 sm->PTK.kck, sizeof(sm->PTK.kck),
4bb081f1
JM		 3061 sm->wpa_auth->addr, sm->addr, session_timeout,
3062 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 3063 return 0;
3064
3065 return -1;
3066}
3067
3068
3069int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3070 const u8 *pmk, size_t len, const u8 *sta_addr,
3071 int session_timeout,
3072 struct eapol_state_machine *eapol)
3073{
3074 if (wpa_auth == NULL)
3075 return -1;
3076
087a1f4e
JM		 3077 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len,
3078 NULL, 0,
3079 wpa_auth->addr,
4bb081f1
JM		 3080 sta_addr, session_timeout, eapol,
3081 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 3082 return 0;
3083
3084 return -1;
3085}
3086
3087
f2991170
JM		 3088int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
3089 const u8 *pmk)
3090{
3091 if (wpa_auth->conf.disable_pmksa_caching)
3092 return -1;
3093
3094 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN,
087a1f4e 3095 NULL, 0,
f2991170
JM		 3096 wpa_auth->addr, addr, 0, NULL,
3097 WPA_KEY_MGMT_SAE))
3098 return 0;
3099
3100 return -1;
3101}
3102
3103
901d1fe1
JM		 3104void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3105 const u8 *sta_addr)
3106{
3107 struct rsn_pmksa_cache_entry *pmksa;
3108
3109 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3110 return;
3111 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3112 if (pmksa) {
3113 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3114 MACSTR " based on request", MAC2STR(sta_addr));
3115 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3116 }
3117}
3118
3119
6fc6879b
JM		 3120static struct wpa_group *
3121wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3122{
3123 struct wpa_group *group;
3124
3125 if (wpa_auth == NULL || wpa_auth->group == NULL)
3126 return NULL;
3127
3128 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
3129 vlan_id);
bdffdc5d 3130 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 3131 if (group == NULL)
3132 return NULL;
3133
3134 group->next = wpa_auth->group->next;
3135 wpa_auth->group->next = group;
3136
3137 return group;
3138}
3139
3140
3141int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
3142{
3143 struct wpa_group *group;
3144
3145 if (sm == NULL || sm->wpa_auth == NULL)
3146 return 0;
3147
3148 group = sm->wpa_auth->group;
3149 while (group) {
3150 if (group->vlan_id == vlan_id)
3151 break;
3152 group = group->next;
3153 }
3154
3155 if (group == NULL) {
3156 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
3157 if (group == NULL)
3158 return -1;
3159 }
3160
3161 if (sm->group == group)
3162 return 0;
3163
7d7f7be2
JM		 3164 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3165 return -1;
3166
6fc6879b
JM		 3167 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
3168 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
3169
3170 sm->group = group;
3171 return 0;
3172}
e4bf4db9
JM		 3173
3174
3175void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
3176 struct wpa_state_machine *sm, int ack)
3177{
3178 if (wpa_auth == NULL || sm == NULL)
3179 return;
3180 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
3181 " ack=%d", MAC2STR(sm->addr), ack);
3182 if (sm->pending_1_of_4_timeout && ack) {
3183 /*
3184 * Some deployed supplicant implementations update their SNonce
3185 * for each EAPOL-Key 2/4 message even within the same 4-way
3186 * handshake and then fail to use the first SNonce when
3187 * deriving the PTK. This results in unsuccessful 4-way
3188 * handshake whenever the relatively short initial timeout is
3189 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
3190 * around this by increasing the timeout now that we know that
3191 * the station has received the frame.
3192 */
3193 int timeout_ms = eapol_key_timeout_subseq;
3194 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
3195 "timeout by %u ms because of acknowledged frame",
3196 timeout_ms);
3197 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
3198 eloop_register_timeout(timeout_ms / 1000,
3199 (timeout_ms % 1000) * 1000,
3200 wpa_send_eapol_timeout, wpa_auth, sm);
3201 }
3202}
c10347f2
JM		 3203
3204
3205int wpa_auth_uses_sae(struct wpa_state_machine *sm)
3206{
3207 if (sm == NULL)
3208 return 0;
3209 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
3210}
aa189ac9
JM		 3211
3212
3213int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
3214{
3215 if (sm == NULL)
3216 return 0;
3217 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
3218}
25ef8529
JM		 3219
3220
3221#ifdef CONFIG_P2P
3222int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
3223{
3224 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
3225 return -1;
3226 os_memcpy(addr, sm->ip_addr, 4);
3227 return 0;
3228}
3229#endif /* CONFIG_P2P */
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