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FILS: Handle Group Key msg 1/2 without MIC when using AEAD cipher (STA)
[thirdparty/hostap.git] / src / ap / wpa_auth.c
CommitLineData
6fc6879b 1/*
00338a4f 2 * IEEE 802.11 RSN / WPA Authenticator
98cd3d1c 3 * Copyright (c) 2004-2015, 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"
3b5b7aa8 16#include "crypto/aes.h"
03da66bd 17#include "crypto/aes_wrap.h"
3b5b7aa8 18#include "crypto/aes_siv.h"
03da66bd
JM		 19#include "crypto/crypto.h"
20#include "crypto/sha1.h"
21#include "crypto/sha256.h"
3642c431 22#include "crypto/random.h"
281c950b 23#include "eapol_auth/eapol_auth_sm.h"
6226e38d 24#include "ap_config.h"
6fc6879b 25#include "ieee802_11.h"
6226e38d
JM		 26#include "wpa_auth.h"
27#include "pmksa_cache_auth.h"
6fc6879b
JM		 28#include "wpa_auth_i.h"
29#include "wpa_auth_ie.h"
30
31#define STATE_MACHINE_DATA struct wpa_state_machine
32#define STATE_MACHINE_DEBUG_PREFIX "WPA"
33#define STATE_MACHINE_ADDR sm->addr
34
35
36static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 37static int wpa_sm_step(struct wpa_state_machine *sm);
929a2ea5
JM		 38static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
39 size_t data_len);
75c8563e
JM		 40#ifdef CONFIG_FILS
41static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
42 u8 *buf, size_t buf_len, u16 *_key_data_len);
43#endif /* CONFIG_FILS */
6fc6879b
JM		 44static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
45static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
46 struct wpa_group *group);
581a8cde 47static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 48static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
49 struct wpa_group *group);
1bdb7ab3
JM		 50static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
51 struct wpa_group *group);
f23c5b17 52static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 53 const u8 *pmk, unsigned int pmk_len,
54 struct wpa_ptk *ptk);
a0ad9e8c
MB		 55static void wpa_group_free(struct wpa_authenticator *wpa_auth,
56 struct wpa_group *group);
57static void wpa_group_get(struct wpa_authenticator *wpa_auth,
58 struct wpa_group *group);
59static void wpa_group_put(struct wpa_authenticator *wpa_auth,
60 struct wpa_group *group);
6fc6879b 61
bae61562
JM		 62static const u32 dot11RSNAConfigGroupUpdateCount = 4;
63static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
64static const u32 eapol_key_timeout_first = 100; /* ms */
65static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 66static const u32 eapol_key_timeout_first_group = 500; /* ms */
6fc6879b
JM		 67
68/* TODO: make these configurable */
69static const int dot11RSNAConfigPMKLifetime = 43200;
70static const int dot11RSNAConfigPMKReauthThreshold = 70;
71static const int dot11RSNAConfigSATimeout = 60;
72
73
c772d054 74static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 75 struct wpa_authenticator *wpa_auth, const u8 *addr)
76{
77 if (wpa_auth->cb.mic_failure_report)
c772d054
JM		 78 return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
79 return 0;
6fc6879b
JM		 80}
81
82
2c502460
JM		 83static inline void wpa_auth_psk_failure_report(
84 struct wpa_authenticator *wpa_auth, const u8 *addr)
85{
86 if (wpa_auth->cb.psk_failure_report)
87 wpa_auth->cb.psk_failure_report(wpa_auth->cb.ctx, addr);
88}
89
90
6fc6879b
JM		 91static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
92 const u8 *addr, wpa_eapol_variable var,
93 int value)
94{
95 if (wpa_auth->cb.set_eapol)
96 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
97}
98
99
100static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
101 const u8 *addr, wpa_eapol_variable var)
102{
103 if (wpa_auth->cb.get_eapol == NULL)
104 return -1;
105 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
106}
107
108
109static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 110 const u8 *addr,
111 const u8 *p2p_dev_addr,
112 const u8 *prev_psk)
6fc6879b
JM		 113{
114 if (wpa_auth->cb.get_psk == NULL)
115 return NULL;
759fd76b
JM		 116 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
117 prev_psk);
6fc6879b
JM		 118}
119
120
121static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
122 const u8 *addr, u8 *msk, size_t *len)
123{
124 if (wpa_auth->cb.get_msk == NULL)
125 return -1;
126 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
127}
128
129
130static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
131 int vlan_id,
71934751 132 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 133 u8 *key, size_t key_len)
134{
135 if (wpa_auth->cb.set_key == NULL)
136 return -1;
137 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
138 key, key_len);
139}
140
141
142static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
143 const u8 *addr, int idx, u8 *seq)
144{
145 if (wpa_auth->cb.get_seqnum == NULL)
146 return -1;
147 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
148}
149
150
6fc6879b
JM		 151static inline int
152wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
153 const u8 *data, size_t data_len, int encrypt)
154{
155 if (wpa_auth->cb.send_eapol == NULL)
156 return -1;
157 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
158 encrypt);
159}
160
161
c50d94f1
BC		 162#ifdef CONFIG_MESH
163static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
164 const u8 *addr)
165{
166 if (wpa_auth->cb.start_ampe == NULL)
167 return -1;
168 return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr);
169}
170#endif /* CONFIG_MESH */
171
172
6fc6879b
JM		 173int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
174 int (*cb)(struct wpa_state_machine *sm, void *ctx),
175 void *cb_ctx)
176{
177 if (wpa_auth->cb.for_each_sta == NULL)
178 return 0;
179 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
180}
181
182
bf98f7f3
JM		 183int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
184 int (*cb)(struct wpa_authenticator *a, void *ctx),
185 void *cb_ctx)
186{
187 if (wpa_auth->cb.for_each_auth == NULL)
188 return 0;
189 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
190}
191
192
6fc6879b
JM		 193void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
194 logger_level level, const char *txt)
195{
196 if (wpa_auth->cb.logger == NULL)
197 return;
198 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
199}
200
201
202void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
203 logger_level level, const char *fmt, ...)
204{
205 char *format;
206 int maxlen;
207 va_list ap;
208
209 if (wpa_auth->cb.logger == NULL)
210 return;
211
212 maxlen = os_strlen(fmt) + 100;
213 format = os_malloc(maxlen);
214 if (!format)
215 return;
216
217 va_start(ap, fmt);
218 vsnprintf(format, maxlen, fmt, ap);
219 va_end(ap);
220
221 wpa_auth_logger(wpa_auth, addr, level, format);
222
223 os_free(format);
224}
225
226
227static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
228 const u8 *addr)
229{
230 if (wpa_auth->cb.disconnect == NULL)
231 return;
afcc9ea1 232 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
6fc6879b
JM		 233 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
234 WLAN_REASON_PREV_AUTH_NOT_VALID);
235}
236
237
238static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
239{
56586197 240 int ret = 0;
6fc6879b 241#ifdef CONFIG_IEEE80211R
56586197
JM		 242 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
243 ret = 1;
6fc6879b 244#endif /* CONFIG_IEEE80211R */
56586197
JM		 245#ifdef CONFIG_IEEE80211W
246 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
247 ret = 1;
248#endif /* CONFIG_IEEE80211W */
a14896e8
JM		 249 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
250 ret = 1;
56586197 251 return ret;
6fc6879b
JM		 252}
253
254
255static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
256{
257 struct wpa_authenticator *wpa_auth = eloop_ctx;
258
3642c431 259 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 260 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
261 "initialization.");
262 } else {
263 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 264 wpa_hexdump_key(MSG_DEBUG, "GMK",
265 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 266 }
267
268 if (wpa_auth->conf.wpa_gmk_rekey) {
269 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
270 wpa_rekey_gmk, wpa_auth, NULL);
271 }
272}
273
274
275static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
276{
277 struct wpa_authenticator *wpa_auth = eloop_ctx;
a0ad9e8c 278 struct wpa_group *group, *next;
6fc6879b
JM		 279
280 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
a0ad9e8c
MB		 281 group = wpa_auth->group;
282 while (group) {
283 wpa_group_get(wpa_auth, group);
284
6fc6879b
JM		 285 group->GTKReKey = TRUE;
286 do {
287 group->changed = FALSE;
288 wpa_group_sm_step(wpa_auth, group);
289 } while (group->changed);
a0ad9e8c
MB		 290
291 next = group->next;
292 wpa_group_put(wpa_auth, group);
293 group = next;
6fc6879b
JM		 294 }
295
296 if (wpa_auth->conf.wpa_group_rekey) {
297 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
298 0, wpa_rekey_gtk, wpa_auth, NULL);
299 }
300}
301
302
581a8cde
JM		 303static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
304{
305 struct wpa_authenticator *wpa_auth = eloop_ctx;
306 struct wpa_state_machine *sm = timeout_ctx;
307
308 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
309 wpa_request_new_ptk(sm);
310 wpa_sm_step(sm);
311}
312
313
6fc6879b
JM		 314static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
315{
316 if (sm->pmksa == ctx)
317 sm->pmksa = NULL;
318 return 0;
319}
320
321
322static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
323 void *ctx)
324{
325 struct wpa_authenticator *wpa_auth = ctx;
326 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
327}
328
329
1bdb7ab3
JM		 330static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
331 struct wpa_group *group)
332{
559cdabb 333 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 334 u8 rkey[32];
559cdabb 335 unsigned long ptr;
1bdb7ab3 336
3642c431 337 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 338 return -1;
339 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
340
341 /*
342 * Counter = PRF-256(Random number, "Init Counter",
343 * Local MAC Address || Time)
344 */
345 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
346 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 347 ptr = (unsigned long) group;
348 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
3642c431 349 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 350 return -1;
351
352 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
353 group->Counter, WPA_NONCE_LEN) < 0)
354 return -1;
355 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
356 group->Counter, WPA_NONCE_LEN);
357
358 return 0;
359}
360
361
e6965d4e 362static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 363 int vlan_id, int delay_init)
e6965d4e
JM		 364{
365 struct wpa_group *group;
e6965d4e
JM		 366
367 group = os_zalloc(sizeof(struct wpa_group));
368 if (group == NULL)
369 return NULL;
370
371 group->GTKAuthenticator = TRUE;
372 group->vlan_id = vlan_id;
c3550295 373 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 374
08704cd8
JM		 375 if (random_pool_ready() != 1) {
376 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
377 "for secure operations - update keys later when "
378 "the first station connects");
379 }
380
1bdb7ab3
JM		 381 /*
382 * Set initial GMK/Counter value here. The actual values that will be
383 * used in negotiations will be set once the first station tries to
384 * connect. This allows more time for collecting additional randomness
385 * on embedded devices.
6fc6879b 386 */
1bdb7ab3 387 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 388 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
389 "initialization.");
390 os_free(group);
391 return NULL;
392 }
6fc6879b
JM		 393
394 group->GInit = TRUE;
bdffdc5d
JM		 395 if (delay_init) {
396 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
397 "until Beacon frames have been configured");
398 /* Initialization is completed in wpa_init_keys(). */
399 } else {
400 wpa_group_sm_step(wpa_auth, group);
401 group->GInit = FALSE;
402 wpa_group_sm_step(wpa_auth, group);
403 }
6fc6879b
JM		 404
405 return group;
406}
407
408
409/**
410 * wpa_init - Initialize WPA authenticator
411 * @addr: Authenticator address
412 * @conf: Configuration for WPA authenticator
a17df5fb 413 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 414 * Returns: Pointer to WPA authenticator data or %NULL on failure
415 */
416struct wpa_authenticator * wpa_init(const u8 *addr,
417 struct wpa_auth_config *conf,
418 struct wpa_auth_callbacks *cb)
419{
420 struct wpa_authenticator *wpa_auth;
421
422 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
423 if (wpa_auth == NULL)
424 return NULL;
425 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
426 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
427 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
428
429 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
430 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
431 os_free(wpa_auth);
432 return NULL;
433 }
434
bdffdc5d 435 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 436 if (wpa_auth->group == NULL) {
437 os_free(wpa_auth->wpa_ie);
438 os_free(wpa_auth);
439 return NULL;
440 }
441
4bb081f1
JM		 442 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
443 wpa_auth);
6fc6879b
JM		 444 if (wpa_auth->pmksa == NULL) {
445 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 446 os_free(wpa_auth->group);
6fc6879b
JM		 447 os_free(wpa_auth->wpa_ie);
448 os_free(wpa_auth);
449 return NULL;
450 }
451
452#ifdef CONFIG_IEEE80211R
453 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
454 if (wpa_auth->ft_pmk_cache == NULL) {
455 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 456 os_free(wpa_auth->group);
6fc6879b 457 os_free(wpa_auth->wpa_ie);
4bb081f1 458 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 459 os_free(wpa_auth);
460 return NULL;
461 }
462#endif /* CONFIG_IEEE80211R */
463
464 if (wpa_auth->conf.wpa_gmk_rekey) {
465 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
466 wpa_rekey_gmk, wpa_auth, NULL);
467 }
468
469 if (wpa_auth->conf.wpa_group_rekey) {
470 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
471 wpa_rekey_gtk, wpa_auth, NULL);
472 }
473
25ef8529
JM		 474#ifdef CONFIG_P2P
475 if (WPA_GET_BE32(conf->ip_addr_start)) {
476 int count = WPA_GET_BE32(conf->ip_addr_end) -
477 WPA_GET_BE32(conf->ip_addr_start) + 1;
478 if (count > 1000)
479 count = 1000;
480 if (count > 0)
481 wpa_auth->ip_pool = bitfield_alloc(count);
482 }
483#endif /* CONFIG_P2P */
484
6fc6879b
JM		 485 return wpa_auth;
486}
487
488
bdffdc5d
JM		 489int wpa_init_keys(struct wpa_authenticator *wpa_auth)
490{
491 struct wpa_group *group = wpa_auth->group;
492
493 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
494 "keys");
495 wpa_group_sm_step(wpa_auth, group);
496 group->GInit = FALSE;
497 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 498 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
499 return -1;
bdffdc5d
JM		 500 return 0;
501}
502
503
6fc6879b
JM		 504/**
505 * wpa_deinit - Deinitialize WPA authenticator
506 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
507 */
508void wpa_deinit(struct wpa_authenticator *wpa_auth)
509{
510 struct wpa_group *group, *prev;
511
512 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
513 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
514
515#ifdef CONFIG_PEERKEY
516 while (wpa_auth->stsl_negotiations)
517 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
518#endif /* CONFIG_PEERKEY */
519
4bb081f1 520 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 521
522#ifdef CONFIG_IEEE80211R
523 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
524 wpa_auth->ft_pmk_cache = NULL;
525#endif /* CONFIG_IEEE80211R */
526
25ef8529
JM		 527#ifdef CONFIG_P2P
528 bitfield_free(wpa_auth->ip_pool);
529#endif /* CONFIG_P2P */
530
531
6fc6879b
JM		 532 os_free(wpa_auth->wpa_ie);
533
534 group = wpa_auth->group;
535 while (group) {
536 prev = group;
537 group = group->next;
538 os_free(prev);
539 }
540
541 os_free(wpa_auth);
542}
543
544
545/**
546 * wpa_reconfig - Update WPA authenticator configuration
547 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
548 * @conf: Configuration for WPA authenticator
549 */
550int wpa_reconfig(struct wpa_authenticator *wpa_auth,
551 struct wpa_auth_config *conf)
552{
e6965d4e 553 struct wpa_group *group;
6fc6879b
JM		 554 if (wpa_auth == NULL)
555 return 0;
556
557 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 558 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
559 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
560 return -1;
561 }
562
e6965d4e
JM		 563 /*
564 * Reinitialize GTK to make sure it is suitable for the new
565 * configuration.
566 */
567 group = wpa_auth->group;
c3550295 568 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 569 group->GInit = TRUE;
570 wpa_group_sm_step(wpa_auth, group);
571 group->GInit = FALSE;
572 wpa_group_sm_step(wpa_auth, group);
573
6fc6879b
JM		 574 return 0;
575}
576
577
578struct wpa_state_machine *
94ddef3e
JM		 579wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
580 const u8 *p2p_dev_addr)
6fc6879b
JM		 581{
582 struct wpa_state_machine *sm;
583
7d7f7be2
JM		 584 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
585 return NULL;
586
6fc6879b
JM		 587 sm = os_zalloc(sizeof(struct wpa_state_machine));
588 if (sm == NULL)
589 return NULL;
590 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 591 if (p2p_dev_addr)
592 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 593
594 sm->wpa_auth = wpa_auth;
595 sm->group = wpa_auth->group;
a0ad9e8c 596 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 597
598 return sm;
599}
600
601
6f9b5d16
JM		 602int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
603 struct wpa_state_machine *sm)
6fc6879b
JM		 604{
605 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 606 return -1;
6fc6879b
JM		 607
608#ifdef CONFIG_IEEE80211R
609 if (sm->ft_completed) {
610 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
611 "FT authentication already completed - do not "
612 "start 4-way handshake");
3d4d2348
JM		 613 /* Go to PTKINITDONE state to allow GTK rekeying */
614 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
6f9b5d16 615 return 0;
6fc6879b
JM		 616 }
617#endif /* CONFIG_IEEE80211R */
618
619 if (sm->started) {
22a299ee 620 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 621 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 622 return wpa_sm_step(sm);
6fc6879b
JM		 623 }
624
625 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
626 "start authentication");
627 sm->started = 1;
628
629 sm->Init = TRUE;
e4a6ea1d 630 if (wpa_sm_step(sm) == 1)
6f9b5d16 631 return 1; /* should not really happen */
6fc6879b
JM		 632 sm->Init = FALSE;
633 sm->AuthenticationRequest = TRUE;
6f9b5d16 634 return wpa_sm_step(sm);
6fc6879b
JM		 635}
636
637
a8d05fca
JM		 638void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
639{
640 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
641 * reassociates back to the same AP while the previous entry for the
642 * STA has not yet been removed. */
643 if (sm == NULL)
644 return;
645
646 sm->wpa_key_mgmt = 0;
647}
648
649
6fc6879b
JM		 650static void wpa_free_sta_sm(struct wpa_state_machine *sm)
651{
25ef8529
JM		 652#ifdef CONFIG_P2P
653 if (WPA_GET_BE32(sm->ip_addr)) {
654 u32 start;
655 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
656 "address %u.%u.%u.%u from " MACSTR,
657 sm->ip_addr[0], sm->ip_addr[1],
658 sm->ip_addr[2], sm->ip_addr[3],
659 MAC2STR(sm->addr));
660 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
661 bitfield_clear(sm->wpa_auth->ip_pool,
662 WPA_GET_BE32(sm->ip_addr) - start);
663 }
664#endif /* CONFIG_P2P */
2ade8ef2
JM		 665 if (sm->GUpdateStationKeys) {
666 sm->group->GKeyDoneStations--;
667 sm->GUpdateStationKeys = FALSE;
668 }
0f857f43
JM		 669#ifdef CONFIG_IEEE80211R
670 os_free(sm->assoc_resp_ftie);
692ec305 671 wpabuf_free(sm->ft_pending_req_ies);
0f857f43 672#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 673 os_free(sm->last_rx_eapol_key);
674 os_free(sm->wpa_ie);
a0ad9e8c 675 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b
JM		 676 os_free(sm);
677}
678
679
680void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
681{
682 if (sm == NULL)
683 return;
684
685 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
686 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
687 "strict rekeying - force GTK rekey since STA "
688 "is leaving");
689 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
690 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
691 NULL);
692 }
693
694 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 695 sm->pending_1_of_4_timeout = 0;
6fc6879b 696 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 697 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 698 if (sm->in_step_loop) {
699 /* Must not free state machine while wpa_sm_step() is running.
700 * Freeing will be completed in the end of wpa_sm_step(). */
701 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
702 "machine deinit for " MACSTR, MAC2STR(sm->addr));
703 sm->pending_deinit = 1;
704 } else
705 wpa_free_sta_sm(sm);
706}
707
708
709static void wpa_request_new_ptk(struct wpa_state_machine *sm)
710{
711 if (sm == NULL)
712 return;
713
714 sm->PTKRequest = TRUE;
715 sm->PTK_valid = 0;
716}
717
718
68921e24 719static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 720 const u8 *replay_counter)
721{
722 int i;
723 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 724 if (!ctr[i].valid)
22a299ee 725 break;
68921e24 726 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 727 WPA_REPLAY_COUNTER_LEN) == 0)
728 return 1;
729 }
730 return 0;
731}
732
733
68921e24
JM		 734static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
735 const u8 *replay_counter)
736{
737 int i;
738 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
739 if (ctr[i].valid &&
740 (replay_counter == NULL ||
741 os_memcmp(replay_counter, ctr[i].counter,
742 WPA_REPLAY_COUNTER_LEN) == 0))
743 ctr[i].valid = FALSE;
744 }
745}
746
747
0f857f43
JM		 748#ifdef CONFIG_IEEE80211R
749static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
750 struct wpa_state_machine *sm,
751 struct wpa_eapol_ie_parse *kde)
752{
753 struct wpa_ie_data ie;
754 struct rsn_mdie *mdie;
755
756 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
757 ie.num_pmkid != 1 || ie.pmkid == NULL) {
758 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
759 "FT 4-way handshake message 2/4");
760 return -1;
761 }
762
763 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
764 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
765 sm->sup_pmk_r1_name, PMKID_LEN);
766
767 if (!kde->mdie || !kde->ftie) {
768 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
769 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
770 return -1;
771 }
772
773 mdie = (struct rsn_mdie *) (kde->mdie + 2);
774 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
775 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
776 MOBILITY_DOMAIN_ID_LEN) != 0) {
777 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
778 return -1;
779 }
780
781 if (sm->assoc_resp_ftie &&
782 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
783 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
784 2 + sm->assoc_resp_ftie[1]) != 0)) {
785 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
786 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
787 kde->ftie, kde->ftie_len);
788 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
789 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
790 return -1;
791 }
792
793 return 0;
794}
795#endif /* CONFIG_IEEE80211R */
796
797
c772d054
JM		 798static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
799 struct wpa_state_machine *sm, int group)
ec027805
JM		 800{
801 /* Supplicant reported a Michael MIC error */
802 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
803 "received EAPOL-Key Error Request "
804 "(STA detected Michael MIC failure (group=%d))",
805 group);
fbc72d32
JM		 806
807 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
808 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
809 "ignore Michael MIC failure report since "
810 "group cipher is not TKIP");
811 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
812 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
813 "ignore Michael MIC failure report since "
814 "pairwise cipher is not TKIP");
815 } else {
c772d054
JM		 816 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
817 return 1; /* STA entry was removed */
fbc72d32
JM		 818 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
819 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
820 }
ec027805
JM		 821
822 /*
823 * Error report is not a request for a new key handshake, but since
824 * Authenticator may do it, let's change the keys now anyway.
825 */
826 wpa_request_new_ptk(sm);
c772d054 827 return 0;
ec027805
JM		 828}
829
830
f23c5b17
JM		 831static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
832 size_t data_len)
833{
834 struct wpa_ptk PTK;
835 int ok = 0;
836 const u8 *pmk = NULL;
207976f0 837 unsigned int pmk_len;
f23c5b17 838
b729fd8d 839 os_memset(&PTK, 0, sizeof(PTK));
f23c5b17
JM		 840 for (;;) {
841 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
842 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
843 sm->p2p_dev_addr, pmk);
844 if (pmk == NULL)
845 break;
207976f0
JM		 846 pmk_len = PMK_LEN;
847 } else {
f23c5b17 848 pmk = sm->PMK;
207976f0
JM		 849 pmk_len = sm->pmk_len;
850 }
f23c5b17 851
207976f0 852 wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK);
f23c5b17
JM		 853
854 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len)
855 == 0) {
856 ok = 1;
857 break;
858 }
859
860 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
861 break;
862 }
863
864 if (!ok) {
865 wpa_printf(MSG_DEBUG,
866 "WPA: Earlier SNonce did not result in matching MIC");
867 return -1;
868 }
869
870 wpa_printf(MSG_DEBUG,
871 "WPA: Earlier SNonce resulted in matching MIC");
872 sm->alt_snonce_valid = 0;
873 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
874 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
875 sm->PTK_valid = TRUE;
876
877 return 0;
878}
879
880
6fc6879b
JM		 881void wpa_receive(struct wpa_authenticator *wpa_auth,
882 struct wpa_state_machine *sm,
883 u8 *data, size_t data_len)
884{
885 struct ieee802_1x_hdr *hdr;
886 struct wpa_eapol_key *key;
887 u16 key_info, key_data_length;
888 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
889 SMK_M1, SMK_M3, SMK_ERROR } msg;
890 char *msgtxt;
891 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 892 const u8 *key_data;
893 size_t keyhdrlen, mic_len;
6d014ffc 894 u8 *mic;
6fc6879b
JM		 895
896 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
897 return;
dc5bad48 898 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 899
5e3b5197 900 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
6d014ffc 901 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 902
dc5bad48
JM		 903 if (data_len < sizeof(*hdr) + keyhdrlen) {
904 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 905 return;
dc5bad48 906 }
6fc6879b
JM		 907
908 hdr = (struct ieee802_1x_hdr *) data;
909 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 910 mic = (u8 *) (key + 1);
6fc6879b 911 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 912 key_data = mic + mic_len + 2;
913 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 914 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 915 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
916 MAC2STR(sm->addr), key_info, key->type,
917 (unsigned int) mic_len, key_data_length);
918 wpa_hexdump(MSG_MSGDUMP,
919 "WPA: EAPOL-Key header (ending before Key MIC)",
920 key, sizeof(*key));
921 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
922 mic, mic_len);
5e3b5197 923 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 924 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
925 "key_data overflow (%d > %lu)",
926 key_data_length,
927 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 928 keyhdrlen));
6fc6879b
JM		 929 return;
930 }
931
f8e96eb6 932 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 933 if (key->type == EAPOL_KEY_TYPE_WPA) {
934 /*
935 * Some deployed station implementations seem to send
936 * msg 4/4 with incorrect type value in WPA2 mode.
937 */
938 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
939 "with unexpected WPA type in RSN mode");
940 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 941 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
942 "unexpected type %d in RSN mode",
943 key->type);
944 return;
945 }
946 } else {
947 if (key->type != EAPOL_KEY_TYPE_WPA) {
948 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
949 "unexpected type %d in WPA mode",
950 key->type);
951 return;
952 }
953 }
954
bc8318ac
JM		 955 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
956 WPA_NONCE_LEN);
957 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
958 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
959
6fc6879b
JM		 960 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
961 * are set */
962
963 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
964 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
965 if (key_info & WPA_KEY_INFO_ERROR) {
966 msg = SMK_ERROR;
967 msgtxt = "SMK Error";
968 } else {
969 msg = SMK_M1;
970 msgtxt = "SMK M1";
971 }
972 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
973 msg = SMK_M3;
974 msgtxt = "SMK M3";
975 } else if (key_info & WPA_KEY_INFO_REQUEST) {
976 msg = REQUEST;
977 msgtxt = "Request";
978 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
979 msg = GROUP_2;
980 msgtxt = "2/2 Group";
3b5b7aa8
JM		 981 } else if (key_data_length == 0 ||
982 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
983 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 984 msg = PAIRWISE_4;
985 msgtxt = "4/4 Pairwise";
986 } else {
987 msg = PAIRWISE_2;
988 msgtxt = "2/4 Pairwise";
989 }
990
991 /* TODO: key_info type validation for PeerKey */
992 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
993 msg == GROUP_2) {
994 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 995 if (sm->pairwise == WPA_CIPHER_CCMP ||
996 sm->pairwise == WPA_CIPHER_GCMP) {
6fc6879b 997 if (wpa_use_aes_cmac(sm) &&
a14896e8 998 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
929a2ea5 999 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
b9866483 1000 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1001 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1002 wpa_auth_logger(wpa_auth, sm->addr,
1003 LOGGER_WARNING,
1004 "advertised support for "
1005 "AES-128-CMAC, but did not "
1006 "use it");
1007 return;
1008 }
1009
1010 if (!wpa_use_aes_cmac(sm) &&
1011 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1012 wpa_auth_logger(wpa_auth, sm->addr,
1013 LOGGER_WARNING,
1014 "did not use HMAC-SHA1-AES "
eb7719ff 1015 "with CCMP/GCMP");
6fc6879b
JM		 1016 return;
1017 }
1018 }
929a2ea5
JM		 1019
1020 if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
1021 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1022 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1023 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1024 return;
1025 }
6fc6879b
JM		 1026 }
1027
1028 if (key_info & WPA_KEY_INFO_REQUEST) {
1029 if (sm->req_replay_counter_used &&
1030 os_memcmp(key->replay_counter, sm->req_replay_counter,
1031 WPA_REPLAY_COUNTER_LEN) <= 0) {
1032 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1033 "received EAPOL-Key request with "
1034 "replayed counter");
1035 return;
1036 }
1037 }
1038
1039 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1040 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1041 int i;
68921e24
JM		 1042
1043 if (msg == PAIRWISE_2 &&
1044 wpa_replay_counter_valid(sm->prev_key_replay,
1045 key->replay_counter) &&
1046 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1047 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1048 {
1049 /*
1050 * Some supplicant implementations (e.g., Windows XP
1051 * WZC) update SNonce for each EAPOL-Key 2/4. This
1052 * breaks the workaround on accepting any of the
1053 * pending requests, so allow the SNonce to be updated
1054 * even if we have already sent out EAPOL-Key 3/4.
1055 */
1056 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1057 "Process SNonce update from STA "
1058 "based on retransmitted EAPOL-Key "
1059 "1/4");
1060 sm->update_snonce = 1;
f23c5b17
JM		 1061 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1062 sm->alt_snonce_valid = TRUE;
1063 os_memcpy(sm->alt_replay_counter,
1064 sm->key_replay[0].counter,
1065 WPA_REPLAY_COUNTER_LEN);
1066 goto continue_processing;
1067 }
1068
1069 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1070 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1071 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1072 WPA_REPLAY_COUNTER_LEN) == 0) {
1073 /*
1074 * Supplicant may still be using the old SNonce since
1075 * there was two EAPOL-Key 2/4 messages and they had
1076 * different SNonce values.
1077 */
1078 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1079 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1080 goto continue_processing;
1081 }
1082
1083 if (msg == PAIRWISE_2 &&
1084 wpa_replay_counter_valid(sm->prev_key_replay,
1085 key->replay_counter) &&
1086 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1087 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1088 "ignore retransmitted EAPOL-Key %s - "
1089 "SNonce did not change", msgtxt);
1090 } else {
1091 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1092 "received EAPOL-Key %s with "
1093 "unexpected replay counter", msgtxt);
1094 }
22a299ee
JM		 1095 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1096 if (!sm->key_replay[i].valid)
1097 break;
1098 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1099 sm->key_replay[i].counter,
1100 WPA_REPLAY_COUNTER_LEN);
1101 }
6fc6879b
JM		 1102 wpa_hexdump(MSG_DEBUG, "received replay counter",
1103 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1104 return;
1105 }
1106
68921e24 1107continue_processing:
3b5b7aa8
JM		 1108#ifdef CONFIG_FILS
1109 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1110 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1111 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1112 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1113 return;
1114 }
1115#endif /* CONFIG_FILS */
1116
6fc6879b
JM		 1117 switch (msg) {
1118 case PAIRWISE_2:
1119 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1120 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1121 (!sm->update_snonce ||
1122 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1123 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1124 "received EAPOL-Key msg 2/4 in "
1125 "invalid state (%d) - dropped",
1126 sm->wpa_ptk_state);
1127 return;
1128 }
bbb921da 1129 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1130 if (sm->group->reject_4way_hs_for_entropy) {
1131 /*
1132 * The system did not have enough entropy to generate
1133 * strong random numbers. Reject the first 4-way
1134 * handshake(s) and collect some entropy based on the
1135 * information from it. Once enough entropy is
1136 * available, the next atempt will trigger GMK/Key
1137 * Counter update and the station will be allowed to
1138 * continue.
1139 */
1140 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1141 "collect more entropy for random number "
1142 "generation");
08704cd8 1143 random_mark_pool_ready();
08704cd8
JM		 1144 wpa_sta_disconnect(wpa_auth, sm->addr);
1145 return;
1146 }
6fc6879b
JM		 1147 break;
1148 case PAIRWISE_4:
1149 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1150 !sm->PTK_valid) {
1151 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1152 "received EAPOL-Key msg 4/4 in "
1153 "invalid state (%d) - dropped",
1154 sm->wpa_ptk_state);
1155 return;
1156 }
1157 break;
1158 case GROUP_2:
1159 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1160 || !sm->PTK_valid) {
1161 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1162 "received EAPOL-Key msg 2/2 in "
1163 "invalid state (%d) - dropped",
1164 sm->wpa_ptk_group_state);
1165 return;
1166 }
1167 break;
1168#ifdef CONFIG_PEERKEY
1169 case SMK_M1:
1170 case SMK_M3:
1171 case SMK_ERROR:
1172 if (!wpa_auth->conf.peerkey) {
1173 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1174 "PeerKey use disabled - ignoring message");
1175 return;
1176 }
1177 if (!sm->PTK_valid) {
1178 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1179 "received EAPOL-Key msg SMK in "
1180 "invalid state - dropped");
1181 return;
1182 }
1183 break;
1184#else /* CONFIG_PEERKEY */
1185 case SMK_M1:
1186 case SMK_M3:
1187 case SMK_ERROR:
1188 return; /* STSL disabled - ignore SMK messages */
1189#endif /* CONFIG_PEERKEY */
1190 case REQUEST:
1191 break;
1192 }
1193
1194 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1195 "received EAPOL-Key frame (%s)", msgtxt);
1196
1197 if (key_info & WPA_KEY_INFO_ACK) {
1198 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1199 "received invalid EAPOL-Key: Key Ack set");
1200 return;
1201 }
1202
b9866483
JM		 1203 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1204 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1205 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1206 "received invalid EAPOL-Key: Key MIC not set");
1207 return;
1208 }
1209
b9866483
JM		 1210#ifdef CONFIG_FILS
1211 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1212 (key_info & WPA_KEY_INFO_MIC)) {
1213 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1214 "received invalid EAPOL-Key: Key MIC set");
1215 return;
1216 }
1217#endif /* CONFIG_FILS */
1218
6fc6879b 1219 sm->MICVerified = FALSE;
68921e24 1220 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8
JM		 1221 if (mic_len &&
1222 wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data,
f23c5b17
JM		 1223 data_len) &&
1224 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1225 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1226 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1227 "received EAPOL-Key with invalid MIC");
1228 return;
1229 }
75c8563e
JM		 1230#ifdef CONFIG_FILS
1231 if (!mic_len &&
1232 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1233 &key_data_length) < 0) {
1234 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1235 "received EAPOL-Key with invalid MIC");
1236 return;
1237 }
1238#endif /* CONFIG_FILS */
6fc6879b
JM		 1239 sm->MICVerified = TRUE;
1240 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1241 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1242 }
1243
1244 if (key_info & WPA_KEY_INFO_REQUEST) {
1245 if (sm->MICVerified) {
1246 sm->req_replay_counter_used = 1;
1247 os_memcpy(sm->req_replay_counter, key->replay_counter,
1248 WPA_REPLAY_COUNTER_LEN);
1249 } else {
1250 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1251 "received EAPOL-Key request with "
1252 "invalid MIC");
1253 return;
1254 }
1255
1256 /*
1257 * TODO: should decrypt key data field if encryption was used;
1258 * even though MAC address KDE is not normally encrypted,
1259 * supplicant is allowed to encrypt it.
1260 */
1261 if (msg == SMK_ERROR) {
1262#ifdef CONFIG_PEERKEY
5e3b5197 1263 wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
6fc6879b
JM		 1264#endif /* CONFIG_PEERKEY */
1265 return;
1266 } else if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1267 if (wpa_receive_error_report(
1268 wpa_auth, sm,
1269 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1270 return; /* STA entry was removed */
6fc6879b
JM		 1271 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1272 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1273 "received EAPOL-Key Request for new "
1274 "4-Way Handshake");
1275 wpa_request_new_ptk(sm);
1276#ifdef CONFIG_PEERKEY
1277 } else if (msg == SMK_M1) {
5e3b5197 1278 wpa_smk_m1(wpa_auth, sm, key, key_data,
5c6787a6 1279 key_data_length);
6fc6879b
JM		 1280#endif /* CONFIG_PEERKEY */
1281 } else if (key_data_length > 0 &&
5e3b5197
JM		 1282 wpa_parse_kde_ies(key_data, key_data_length,
1283 &kde) == 0 &&
6fc6879b
JM		 1284 kde.mac_addr) {
1285 } else {
1286 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1287 "received EAPOL-Key Request for GTK "
1288 "rekeying");
6fc6879b
JM		 1289 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1290 wpa_rekey_gtk(wpa_auth, NULL);
1291 }
1292 } else {
68921e24
JM		 1293 /* Do not allow the same key replay counter to be reused. */
1294 wpa_replay_counter_mark_invalid(sm->key_replay,
1295 key->replay_counter);
1296
1297 if (msg == PAIRWISE_2) {
1298 /*
1299 * Maintain a copy of the pending EAPOL-Key frames in
1300 * case the EAPOL-Key frame was retransmitted. This is
1301 * needed to allow EAPOL-Key msg 2/4 reply to another
1302 * pending msg 1/4 to update the SNonce to work around
1303 * unexpected supplicant behavior.
1304 */
1305 os_memcpy(sm->prev_key_replay, sm->key_replay,
1306 sizeof(sm->key_replay));
1307 } else {
1308 os_memset(sm->prev_key_replay, 0,
1309 sizeof(sm->prev_key_replay));
1310 }
1311
1312 /*
1313 * Make sure old valid counters are not accepted anymore and
1314 * do not get copied again.
1315 */
1316 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1317 }
1318
1319#ifdef CONFIG_PEERKEY
1320 if (msg == SMK_M3) {
5e3b5197 1321 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
6fc6879b
JM		 1322 return;
1323 }
1324#endif /* CONFIG_PEERKEY */
1325
1326 os_free(sm->last_rx_eapol_key);
1327 sm->last_rx_eapol_key = os_malloc(data_len);
1328 if (sm->last_rx_eapol_key == NULL)
1329 return;
1330 os_memcpy(sm->last_rx_eapol_key, data, data_len);
1331 sm->last_rx_eapol_key_len = data_len;
1332
0d442aff 1333 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1334 sm->EAPOLKeyReceived = TRUE;
1335 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1336 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1337 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1338 wpa_sm_step(sm);
1339}
1340
1341
3c7302c2
JM		 1342static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1343 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1344{
5cb9d5c3
JM		 1345 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1346 u8 *pos;
3c7302c2 1347 int ret = 0;
6fc6879b 1348
5cb9d5c3
JM		 1349 /* GTK = PRF-X(GMK, "Group key expansion",
1350 * AA || GNonce || Time || random data)
1351 * The example described in the IEEE 802.11 standard uses only AA and
1352 * GNonce as inputs here. Add some more entropy since this derivation
1353 * is done only at the Authenticator and as such, does not need to be
1354 * exactly same.
1355 */
6fc6879b
JM		 1356 os_memcpy(data, addr, ETH_ALEN);
1357 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1358 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1359 wpa_get_ntp_timestamp(pos);
1360 pos += 8;
3642c431 1361 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1362 ret = -1;
6fc6879b 1363
56586197 1364#ifdef CONFIG_IEEE80211W
5cb9d5c3 1365 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1366#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1367 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1368 < 0)
1369 ret = -1;
56586197 1370#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1371
1372 return ret;
6fc6879b
JM		 1373}
1374
1375
1376static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1377{
1378 struct wpa_authenticator *wpa_auth = eloop_ctx;
1379 struct wpa_state_machine *sm = timeout_ctx;
1380
e4bf4db9 1381 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1382 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1383 sm->TimeoutEvt = TRUE;
1384 wpa_sm_step(sm);
1385}
1386
1387
1388void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1389 struct wpa_state_machine *sm, int key_info,
1390 const u8 *key_rsc, const u8 *nonce,
1391 const u8 *kde, size_t kde_len,
1392 int keyidx, int encr, int force_version)
1393{
1394 struct ieee802_1x_hdr *hdr;
1395 struct wpa_eapol_key *key;
5e3b5197 1396 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1397 int alg;
1398 int key_data_len, pad_len = 0;
1399 u8 *buf, *pos;
1400 int version, pairwise;
22a299ee 1401 int i;
6d014ffc 1402 u8 *key_mic, *key_data;
6fc6879b 1403
5e3b5197 1404 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
6d014ffc 1405 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1406
1407 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1408
1409 if (force_version)
1410 version = force_version;
929a2ea5 1411 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
36a50fd4
JM		 1412 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1413 wpa_key_mgmt_fils(sm->wpa_key_mgmt))
a14896e8 1414 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
6fc6879b
JM		 1415 else if (wpa_use_aes_cmac(sm))
1416 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1417 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1418 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1419 else
1420 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1421
8543ed8a 1422 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1423
1424 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1425 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1426 "encr=%d)",
1427 version,
1428 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1429 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1430 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1431 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1432 pairwise, (unsigned long) kde_len, keyidx, encr);
1433
1434 key_data_len = kde_len;
1435
1436 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1437 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1438 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1439 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1440 pad_len = key_data_len % 8;
1441 if (pad_len)
1442 pad_len = 8 - pad_len;
1443 key_data_len += pad_len + 8;
1444 }
1445
1446 len += key_data_len;
b729fd8d
JM		 1447 if (!mic_len && encr)
1448 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1449
1450 hdr = os_zalloc(len);
1451 if (hdr == NULL)
1452 return;
1453 hdr->version = wpa_auth->conf.eapol_version;
1454 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1455 hdr->length = host_to_be16(len - sizeof(*hdr));
1456 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1457 key_mic = (u8 *) (key + 1);
5e3b5197 1458 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1459
1460 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1461 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1462 key_info |= version;
1463 if (encr && sm->wpa == WPA_VERSION_WPA2)
1464 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1465 if (sm->wpa != WPA_VERSION_WPA2)
1466 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1467 WPA_PUT_BE16(key->key_info, key_info);
1468
1469 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
c3550295 1470 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b
JM		 1471 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1472 WPA_PUT_BE16(key->key_length, 0);
1473
1474 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1475 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1476 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1477 os_memcpy(sm->key_replay[i].counter,
1478 sm->key_replay[i - 1].counter,
1479 WPA_REPLAY_COUNTER_LEN);
1480 }
1481 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1482 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1483 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1484 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1485 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1486 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1487
1488 if (nonce)
1489 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1490
1491 if (key_rsc)
1492 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1493
1494 if (kde && !encr) {
5e3b5197 1495 os_memcpy(key_data, kde, kde_len);
6d014ffc 1496 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d
JM		 1497#ifdef CONFIG_FILS
1498 } else if (!mic_len) {
1499 const u8 *aad[1];
1500 size_t aad_len[1];
1501
1502 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1503 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1504 kde, kde_len);
1505
1506 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1507 sm->PTK.kek, sm->PTK.kek_len);
1508 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1509 * to Key Data (exclusive). */
1510 aad[0] = (u8 *) hdr;
1511 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1512 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1513 1, aad, aad_len, key_mic + 2) < 0) {
1514 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1515 return;
1516 }
1517
1518 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1519 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1520#endif /* CONFIG_FILS */
6fc6879b
JM		 1521 } else if (encr && kde) {
1522 buf = os_zalloc(key_data_len);
1523 if (buf == NULL) {
1524 os_free(hdr);
1525 return;
1526 }
1527 pos = buf;
1528 os_memcpy(pos, kde, kde_len);
1529 pos += kde_len;
1530
1531 if (pad_len)
1532 *pos++ = 0xdd;
1533
1534 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1535 buf, key_data_len);
1536 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1537 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1538 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b 1539 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
98cd3d1c 1540 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1541 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1542 os_free(hdr);
1543 os_free(buf);
1544 return;
1545 }
6d014ffc 1546 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1547#ifndef CONFIG_NO_RC4
98cd3d1c 1548 } else if (sm->PTK.kek_len == 16) {
6fc6879b
JM		 1549 u8 ek[32];
1550 os_memcpy(key->key_iv,
1551 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1552 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1553 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1554 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1555 os_memcpy(key_data, buf, key_data_len);
1556 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1557 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1558#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1559 } else {
1560 os_free(hdr);
1561 os_free(buf);
1562 return;
6fc6879b
JM		 1563 }
1564 os_free(buf);
1565 }
1566
1567 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1568 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1569 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1570 "PTK not valid when sending EAPOL-Key "
1571 "frame");
1572 os_free(hdr);
1573 return;
1574 }
5e3b5197 1575
98cd3d1c
JM		 1576 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1577 sm->wpa_key_mgmt, version,
5e3b5197 1578 (u8 *) hdr, len, key_mic);
7af092a0
JB		 1579#ifdef CONFIG_TESTING_OPTIONS
1580 if (!pairwise &&
06df2aa6 1581 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1582 drand48() <
1583 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1584 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1585 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1586 key_mic[0]++;
7af092a0
JB		 1587 }
1588#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1589 }
1590
1591 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1592 1);
1593 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1594 sm->pairwise_set);
1595 os_free(hdr);
1596}
1597
1598
1599static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1600 struct wpa_state_machine *sm, int key_info,
1601 const u8 *key_rsc, const u8 *nonce,
1602 const u8 *kde, size_t kde_len,
1603 int keyidx, int encr)
1604{
1605 int timeout_ms;
1606 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
bae61562 1607 int ctr;
6fc6879b
JM		 1608
1609 if (sm == NULL)
1610 return;
1611
1612 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1613 keyidx, encr, 0);
1614
bae61562 1615 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1616 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1617 timeout_ms = pairwise ? eapol_key_timeout_first :
1618 eapol_key_timeout_first_group;
bae61562
JM		 1619 else
1620 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1621 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1622 sm->pending_1_of_4_timeout = 1;
1623 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1624 "counter %d)", timeout_ms, ctr);
6fc6879b
JM		 1625 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1626 wpa_send_eapol_timeout, wpa_auth, sm);
1627}
1628
1629
929a2ea5
JM		 1630static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
1631 size_t data_len)
6fc6879b
JM		 1632{
1633 struct ieee802_1x_hdr *hdr;
1634 struct wpa_eapol_key *key;
1635 u16 key_info;
1636 int ret = 0;
6d014ffc 1637 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
5e3b5197 1638 size_t mic_len = wpa_mic_len(akmp);
6fc6879b
JM		 1639
1640 if (data_len < sizeof(*hdr) + sizeof(*key))
1641 return -1;
1642
1643 hdr = (struct ieee802_1x_hdr *) data;
1644 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1645 mic_pos = (u8 *) (key + 1);
6fc6879b 1646 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1647 os_memcpy(mic, mic_pos, mic_len);
1648 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1649 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1650 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1651 data, data_len, mic_pos) ||
1652 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1653 ret = -1;
6d014ffc 1654 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1655 return ret;
1656}
1657
1658
1659void wpa_remove_ptk(struct wpa_state_machine *sm)
1660{
1661 sm->PTK_valid = FALSE;
1662 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
26083221 1663 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
6fc6879b 1664 sm->pairwise_set = FALSE;
581a8cde 1665 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1666}
1667
1668
bb119228 1669int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1670{
5d22a1d5
JM		 1671 int remove_ptk = 1;
1672
6fc6879b 1673 if (sm == NULL)
6f9b5d16 1674 return -1;
6fc6879b
JM		 1675
1676 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1677 "event %d notification", event);
1678
1679 switch (event) {
1680 case WPA_AUTH:
c50d94f1
BC		 1681#ifdef CONFIG_MESH
1682 /* PTKs are derived through AMPE */
1683 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1684 /* not mesh */
1685 break;
1686 }
1687 return 0;
1688#endif /* CONFIG_MESH */
6fc6879b
JM		 1689 case WPA_ASSOC:
1690 break;
1691 case WPA_DEAUTH:
1692 case WPA_DISASSOC:
1693 sm->DeauthenticationRequest = TRUE;
1694 break;
1695 case WPA_REAUTH:
1696 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1697 if (!sm->started) {
1698 /*
1699 * When using WPS, we may end up here if the STA
1700 * manages to re-associate without the previous STA
1701 * entry getting removed. Consequently, we need to make
1702 * sure that the WPA state machines gets initialized
1703 * properly at this point.
1704 */
1705 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1706 "started - initialize now");
1707 sm->started = 1;
1708 sm->Init = TRUE;
1709 if (wpa_sm_step(sm) == 1)
1710 return 1; /* should not really happen */
1711 sm->Init = FALSE;
1712 sm->AuthenticationRequest = TRUE;
1713 break;
1714 }
9663596f
JM		 1715 if (sm->GUpdateStationKeys) {
1716 /*
1717 * Reauthentication cancels the pending group key
1718 * update for this STA.
1719 */
1720 sm->group->GKeyDoneStations--;
1721 sm->GUpdateStationKeys = FALSE;
1722 sm->PtkGroupInit = TRUE;
1723 }
6fc6879b
JM		 1724 sm->ReAuthenticationRequest = TRUE;
1725 break;
1726 case WPA_ASSOC_FT:
1727#ifdef CONFIG_IEEE80211R
81a658d7
JM		 1728 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1729 "after association");
1730 wpa_ft_install_ptk(sm);
1731
6fc6879b
JM		 1732 /* Using FT protocol, not WPA auth state machine */
1733 sm->ft_completed = 1;
6f9b5d16 1734 return 0;
6fc6879b
JM		 1735#else /* CONFIG_IEEE80211R */
1736 break;
1737#endif /* CONFIG_IEEE80211R */
1738 }
1739
1740#ifdef CONFIG_IEEE80211R
1741 sm->ft_completed = 0;
1742#endif /* CONFIG_IEEE80211R */
1743
5d22a1d5
JM		 1744#ifdef CONFIG_IEEE80211W
1745 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1746 remove_ptk = 0;
1747#endif /* CONFIG_IEEE80211W */
6fc6879b 1748
5d22a1d5
JM		 1749 if (remove_ptk) {
1750 sm->PTK_valid = FALSE;
1751 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1752
1753 if (event != WPA_REAUTH_EAPOL)
1754 wpa_remove_ptk(sm);
1755 }
6fc6879b 1756
43f49c37
JM		 1757 if (sm->in_step_loop) {
1758 /*
1759 * wpa_sm_step() is already running - avoid recursive call to
1760 * it by making the existing loop process the new update.
1761 */
1762 sm->changed = TRUE;
1763 return 0;
1764 }
6f9b5d16 1765 return wpa_sm_step(sm);
6fc6879b
JM		 1766}
1767
1768
6fc6879b
JM		 1769SM_STATE(WPA_PTK, INITIALIZE)
1770{
1771 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1772 if (sm->Init) {
1773 /* Init flag is not cleared here, so avoid busy
1774 * loop by claiming nothing changed. */
1775 sm->changed = FALSE;
1776 }
1777
1778 sm->keycount = 0;
1779 if (sm->GUpdateStationKeys)
1780 sm->group->GKeyDoneStations--;
1781 sm->GUpdateStationKeys = FALSE;
1782 if (sm->wpa == WPA_VERSION_WPA)
1783 sm->PInitAKeys = FALSE;
1784 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1785 * Local AA > Remote AA)) */) {
1786 sm->Pair = TRUE;
1787 }
1788 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1789 wpa_remove_ptk(sm);
1790 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1791 sm->TimeoutCtr = 0;
56586197 1792 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1793 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1794 WPA_EAPOL_authorized, 0);
1795 }
1796}
1797
1798
1799SM_STATE(WPA_PTK, DISCONNECT)
1800{
1801 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1802 sm->Disconnect = FALSE;
1803 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1804}
1805
1806
1807SM_STATE(WPA_PTK, DISCONNECTED)
1808{
1809 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1810 sm->DeauthenticationRequest = FALSE;
1811}
1812
1813
1814SM_STATE(WPA_PTK, AUTHENTICATION)
1815{
1816 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1817 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1818 sm->PTK_valid = FALSE;
1819 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1820 1);
1821 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1822 sm->AuthenticationRequest = FALSE;
1823}
1824
1825
40d00d2b
NC		 1826static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1827 struct wpa_group *group)
1bdb7ab3 1828{
40d00d2b
NC		 1829 if (group->first_sta_seen)
1830 return;
1bdb7ab3
JM		 1831 /*
1832 * System has run bit further than at the time hostapd was started
1833 * potentially very early during boot up. This provides better chances
1834 * of collecting more randomness on embedded systems. Re-initialize the
1835 * GMK and Counter here to improve their strength if there was not
1836 * enough entropy available immediately after system startup.
1837 */
1838 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1839 "station");
08704cd8
JM		 1840 if (random_pool_ready() != 1) {
1841 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1842 "to proceed - reject first 4-way handshake");
1843 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1844 } else {
1845 group->first_sta_seen = TRUE;
1846 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1847 }
40d00d2b 1848
aac1efec
JM		 1849 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1850 wpa_gtk_update(wpa_auth, group) < 0 ||
1851 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1852 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1853 group->first_sta_seen = FALSE;
1854 group->reject_4way_hs_for_entropy = TRUE;
1855 }
1bdb7ab3
JM		 1856}
1857
1858
6fc6879b
JM		 1859SM_STATE(WPA_PTK, AUTHENTICATION2)
1860{
1861 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1862
40d00d2b 1863 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1864 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1865
3825a19b
JM		 1866 /*
1867 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1868 * ambiguous. The Authenticator state machine uses a counter that is
1869 * incremented by one for each 4-way handshake. However, the security
1870 * analysis of 4-way handshake points out that unpredictable nonces
1871 * help in preventing precomputation attacks. Instead of the state
1872 * machine definition, use an unpredictable nonce value here to provide
1873 * stronger protection against potential precomputation attacks.
1874 */
1875 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1876 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1877 "ANonce.");
65a32cdb 1878 sm->Disconnect = TRUE;
3825a19b
JM		 1879 return;
1880 }
bc8318ac
JM		 1881 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1882 WPA_NONCE_LEN);
6fc6879b
JM		 1883 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1884 * logical place than INITIALIZE since AUTHENTICATION2 can be
1885 * re-entered on ReAuthenticationRequest without going through
1886 * INITIALIZE. */
1887 sm->TimeoutCtr = 0;
1888}
1889
1890
1891SM_STATE(WPA_PTK, INITPMK)
1892{
1893 u8 msk[2 * PMK_LEN];
1894 size_t len = 2 * PMK_LEN;
1895
1896 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1897#ifdef CONFIG_IEEE80211R
1898 sm->xxkey_len = 0;
1899#endif /* CONFIG_IEEE80211R */
1900 if (sm->pmksa) {
1901 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1902 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1903 sm->pmk_len = sm->pmksa->pmk_len;
6fc6879b 1904 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1905 unsigned int pmk_len;
1906
1907 if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
1908 pmk_len = PMK_LEN_SUITE_B_192;
1909 else
1910 pmk_len = PMK_LEN;
6fc6879b 1911 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1912 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1913 pmk_len);
1914 if (len < pmk_len) {
1915 wpa_printf(MSG_DEBUG,
1916 "WPA: MSK not long enough (%u) to create PMK (%u)",
1917 (unsigned int) len, (unsigned int) pmk_len);
1918 sm->Disconnect = TRUE;
1919 return;
1920 }
1921 os_memcpy(sm->PMK, msk, pmk_len);
1922 sm->pmk_len = pmk_len;
6fc6879b
JM		 1923#ifdef CONFIG_IEEE80211R
1924 if (len >= 2 * PMK_LEN) {
1925 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1926 sm->xxkey_len = PMK_LEN;
1927 }
1928#endif /* CONFIG_IEEE80211R */
1929 } else {
400de9b1
BG		 1930 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
1931 sm->wpa_auth->cb.get_msk);
1180dd66
JM		 1932 sm->Disconnect = TRUE;
1933 return;
6fc6879b 1934 }
40aaa64f 1935 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 1936
1937 sm->req_replay_counter_used = 0;
1938 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1939 * will break reauthentication since EAPOL state machines may not be
1940 * get into AUTHENTICATING state that clears keyRun before WPA state
1941 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1942 * state and takes PMK from the previously used AAA Key. This will
1943 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1944 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1945 * be good workaround for this issue. */
1946 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1947}
1948
1949
1950SM_STATE(WPA_PTK, INITPSK)
1951{
1952 const u8 *psk;
1953 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
759fd76b 1954 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
6fc6879b
JM		 1955 if (psk) {
1956 os_memcpy(sm->PMK, psk, PMK_LEN);
207976f0 1957 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 1958#ifdef CONFIG_IEEE80211R
1959 os_memcpy(sm->xxkey, psk, PMK_LEN);
1960 sm->xxkey_len = PMK_LEN;
1961#endif /* CONFIG_IEEE80211R */
1962 }
1963 sm->req_replay_counter_used = 0;
1964}
1965
1966
1967SM_STATE(WPA_PTK, PTKSTART)
1968{
1969 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1970 size_t pmkid_len = 0;
1971
1972 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1973 sm->PTKRequest = FALSE;
1974 sm->TimeoutEvt = FALSE;
f23c5b17 1975 sm->alt_snonce_valid = FALSE;
bae61562
JM		 1976
1977 sm->TimeoutCtr++;
1978 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1979 /* No point in sending the EAPOL-Key - we will disconnect
1980 * immediately following this. */
1981 return;
1982 }
1983
6fc6879b
JM		 1984 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1985 "sending 1/4 msg of 4-Way Handshake");
1986 /*
1987 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1988 * one possible PSK for this STA.
1989 */
1990 if (sm->wpa == WPA_VERSION_WPA2 &&
a14896e8
JM		 1991 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1992 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 1993 pmkid = buf;
1994 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1995 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1996 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1997 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 1998 if (sm->pmksa) {
6fc6879b
JM		 1999 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2000 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2001 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2002 /* No KCK available to derive PMKID */
2003 pmkid = NULL;
2004 } else {
6fc6879b
JM		 2005 /*
2006 * Calculate PMKID since no PMKSA cache entry was
2007 * available with pre-calculated PMKID.
2008 */
207976f0 2009 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197
JM		 2010 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2011 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 2012 }
2013 }
2014 wpa_send_eapol(sm->wpa_auth, sm,
2015 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2016 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2017}
2018
2019
f23c5b17 2020static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2021 const u8 *pmk, unsigned int pmk_len,
2022 struct wpa_ptk *ptk)
6fc6879b
JM		 2023{
2024#ifdef CONFIG_IEEE80211R
56586197 2025 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
98cd3d1c 2026 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
6fc6879b
JM		 2027#endif /* CONFIG_IEEE80211R */
2028
207976f0 2029 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c
JM		 2030 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2031 ptk, sm->wpa_key_mgmt, sm->pairwise);
6fc6879b
JM		 2032}
2033
2034
3b5b7aa8
JM		 2035#ifdef CONFIG_FILS
2036static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2037 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2038{
2039 struct ieee802_1x_hdr *hdr;
2040 struct wpa_eapol_key *key;
2041 u8 *pos;
2042 u16 key_data_len;
2043 u8 *tmp;
2044 const u8 *aad[1];
2045 size_t aad_len[1];
2046
75c8563e 2047 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2048 key = (struct wpa_eapol_key *) (hdr + 1);
2049 pos = (u8 *) (key + 1);
2050 key_data_len = WPA_GET_BE16(pos);
2051 if (key_data_len < AES_BLOCK_SIZE ||
2052 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2053 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2054 "No room for AES-SIV data in the frame");
2055 return -1;
2056 }
2057 pos += 2; /* Pointing at the Encrypted Key Data field */
2058
2059 tmp = os_malloc(key_data_len);
2060 if (!tmp)
2061 return -1;
2062
2063 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2064 * to Key Data (exclusive). */
75c8563e
JM		 2065 aad[0] = buf;
2066 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2067 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2068 1, aad, aad_len, tmp) < 0) {
2069 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2070 "Invalid AES-SIV data in the frame");
2071 bin_clear_free(tmp, key_data_len);
2072 return -1;
2073 }
2074
2075 /* AEAD decryption and validation completed successfully */
2076 key_data_len -= AES_BLOCK_SIZE;
2077 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2078 tmp, key_data_len);
2079
2080 /* Replace Key Data field with the decrypted version */
2081 os_memcpy(pos, tmp, key_data_len);
2082 pos -= 2; /* Key Data Length field */
2083 WPA_PUT_BE16(pos, key_data_len);
2084 bin_clear_free(tmp, key_data_len);
2085 if (_key_data_len)
2086 *_key_data_len = key_data_len;
2087 return 0;
2088}
2089#endif /* CONFIG_FILS */
2090
2091
6fc6879b
JM		 2092SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2093{
3b5b7aa8 2094 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2095 struct wpa_ptk PTK;
2c502460 2096 int ok = 0, psk_found = 0;
6fc6879b 2097 const u8 *pmk = NULL;
207976f0 2098 unsigned int pmk_len;
3b5b7aa8
JM		 2099 int ft;
2100 const u8 *eapol_key_ie, *key_data, *mic;
2101 u16 key_data_length;
2102 size_t mic_len, eapol_key_ie_len;
2103 struct ieee802_1x_hdr *hdr;
2104 struct wpa_eapol_key *key;
2105 struct wpa_eapol_ie_parse kde;
6fc6879b
JM		 2106
2107 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2108 sm->EAPOLKeyReceived = FALSE;
68921e24 2109 sm->update_snonce = FALSE;
b729fd8d 2110 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2111
3b5b7aa8
JM		 2112 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
2113
6fc6879b
JM		 2114 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2115 * WPA-PSK: iterate through possible PSKs and select the one matching
2116 * the packet */
2117 for (;;) {
56586197 2118 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
759fd76b
JM		 2119 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2120 sm->p2p_dev_addr, pmk);
6fc6879b
JM		 2121 if (pmk == NULL)
2122 break;
2c502460 2123 psk_found = 1;
207976f0
JM		 2124 pmk_len = PMK_LEN;
2125 } else {
6fc6879b 2126 pmk = sm->PMK;
207976f0
JM		 2127 pmk_len = sm->pmk_len;
2128 }
6fc6879b 2129
207976f0 2130 wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK);
6fc6879b 2131
3b5b7aa8
JM		 2132 if (mic_len &&
2133 wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK,
929a2ea5 2134 sm->last_rx_eapol_key,
6fc6879b
JM		 2135 sm->last_rx_eapol_key_len) == 0) {
2136 ok = 1;
2137 break;
2138 }
2139
3b5b7aa8 2140#ifdef CONFIG_FILS
75c8563e
JM		 2141 if (!mic_len &&
2142 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2143 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2144 ok = 1;
2145 break;
2146 }
2147#endif /* CONFIG_FILS */
2148
56586197 2149 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 2150 break;
2151 }
2152
2153 if (!ok) {
2154 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2155 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2156 if (psk_found)
2157 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2158 return;
2159 }
2160
3b5b7aa8
JM		 2161 /*
2162 * Note: last_rx_eapol_key length fields have already been validated in
2163 * wpa_receive().
2164 */
2165 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2166 key = (struct wpa_eapol_key *) (hdr + 1);
2167 mic = (u8 *) (key + 1);
2168 key_data = mic + mic_len + 2;
2169 key_data_length = WPA_GET_BE16(mic + mic_len);
2170 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2171 sizeof(*key) - mic_len - 2)
2172 return;
2173
2174 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2175 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2176 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2177 return;
2178 }
2179 if (kde.rsn_ie) {
2180 eapol_key_ie = kde.rsn_ie;
2181 eapol_key_ie_len = kde.rsn_ie_len;
2182 } else if (kde.osen) {
2183 eapol_key_ie = kde.osen;
2184 eapol_key_ie_len = kde.osen_len;
2185 } else {
2186 eapol_key_ie = kde.wpa_ie;
2187 eapol_key_ie_len = kde.wpa_ie_len;
2188 }
2189 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2190 if (sm->wpa_ie == NULL ||
2191 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2192 eapol_key_ie, eapol_key_ie_len)) {
2193 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2194 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2195 if (sm->wpa_ie) {
2196 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2197 sm->wpa_ie, sm->wpa_ie_len);
2198 }
2199 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2200 eapol_key_ie, eapol_key_ie_len);
2201 /* MLME-DEAUTHENTICATE.request */
2202 wpa_sta_disconnect(wpa_auth, sm->addr);
2203 return;
2204 }
2205#ifdef CONFIG_IEEE80211R
2206 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
2207 wpa_sta_disconnect(wpa_auth, sm->addr);
2208 return;
2209 }
2210#endif /* CONFIG_IEEE80211R */
2211#ifdef CONFIG_P2P
2212 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2213 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2214 int idx;
2215 wpa_printf(MSG_DEBUG,
2216 "P2P: IP address requested in EAPOL-Key exchange");
2217 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2218 if (idx >= 0) {
2219 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2220 bitfield_set(wpa_auth->ip_pool, idx);
2221 WPA_PUT_BE32(sm->ip_addr, start + idx);
2222 wpa_printf(MSG_DEBUG,
2223 "P2P: Assigned IP address %u.%u.%u.%u to "
2224 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2225 sm->ip_addr[2], sm->ip_addr[3],
2226 MAC2STR(sm->addr));
2227 }
2228 }
2229#endif /* CONFIG_P2P */
2230
26e23750
JM		 2231#ifdef CONFIG_IEEE80211R
2232 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2233 /*
2234 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2235 * with the value we derived.
2236 */
870834a1
JM		 2237 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2238 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2239 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2240 "PMKR1Name mismatch in FT 4-way "
2241 "handshake");
2242 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2243 "Supplicant",
2244 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2245 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2246 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2247 return;
2248 }
2249 }
2250#endif /* CONFIG_IEEE80211R */
2251
e4bf4db9 2252 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2253 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2254
56586197 2255 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2256 /* PSK may have changed from the previous choice, so update
2257 * state machine data based on whatever PSK was selected here.
2258 */
2259 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2260 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2261 }
2262
2263 sm->MICVerified = TRUE;
2264
2265 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2266 sm->PTK_valid = TRUE;
2267}
2268
2269
2270SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2271{
2272 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2273 sm->TimeoutCtr = 0;
2274}
2275
2276
2277#ifdef CONFIG_IEEE80211W
2278
2279static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2280{
2281 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2282 size_t len;
2283 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2284 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2285 }
2286
2287 return 0;
2288}
2289
2290
2291static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2292{
2293 struct wpa_igtk_kde igtk;
2294 struct wpa_group *gsm = sm->group;
03610ad2 2295 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 2296 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 2297
2298 if (!sm->mgmt_frame_prot)
2299 return pos;
2300
2301 igtk.keyid[0] = gsm->GN_igtk;
2302 igtk.keyid[1] = 0;
7b1080da 2303 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 2304 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 2305 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 2306 else
2307 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 2308 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
83421850
JM		 2309 if (sm->wpa_auth->conf.disable_gtk) {
2310 /*
2311 * Provide unique random IGTK to each STA to prevent use of
2312 * IGTK in the BSS.
2313 */
8dd9f9cd 2314 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 2315 return pos;
2316 }
6fc6879b 2317 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 2318 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2319 NULL, 0);
6fc6879b
JM		 2320
2321 return pos;
2322}
2323
2324#else /* CONFIG_IEEE80211W */
2325
2326static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2327{
2328 return 0;
2329}
2330
2331
2332static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2333{
2334 return pos;
2335}
2336
2337#endif /* CONFIG_IEEE80211W */
2338
2339
2340SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2341{
83421850 2342 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 2343 size_t gtk_len, kde_len;
2344 struct wpa_group *gsm = sm->group;
2345 u8 *wpa_ie;
2346 int wpa_ie_len, secure, keyidx, encr = 0;
2347
2348 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2349 sm->TimeoutEvt = FALSE;
bae61562
JM		 2350
2351 sm->TimeoutCtr++;
2352 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
2353 /* No point in sending the EAPOL-Key - we will disconnect
2354 * immediately following this. */
2355 return;
2356 }
2357
86dfabb8
JM		 2358 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2359 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2360 */
2361 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2362 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2363 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2364 wpa_ie = sm->wpa_auth->wpa_ie;
2365 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2366 if (sm->wpa == WPA_VERSION_WPA &&
2367 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2368 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 2369 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 2370 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 2371 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2372 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 2373 wpa_ie_len = wpa_ie[1] + 2;
2374 }
2375 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2376 "sending 3/4 msg of 4-Way Handshake");
2377 if (sm->wpa == WPA_VERSION_WPA2) {
2378 /* WPA2 send GTK in the 4-way handshake */
2379 secure = 1;
2380 gtk = gsm->GTK[gsm->GN - 1];
2381 gtk_len = gsm->GTK_len;
83421850
JM		 2382 if (sm->wpa_auth->conf.disable_gtk) {
2383 /*
2384 * Provide unique random GTK to each STA to prevent use
2385 * of GTK in the BSS.
2386 */
2387 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2388 return;
2389 gtk = dummy_gtk;
2390 }
6fc6879b
JM		 2391 keyidx = gsm->GN;
2392 _rsc = rsc;
2393 encr = 1;
2394 } else {
2395 /* WPA does not include GTK in msg 3/4 */
2396 secure = 0;
2397 gtk = NULL;
2398 gtk_len = 0;
2399 keyidx = 0;
2400 _rsc = NULL;
0d442aff
JM		 2401 if (sm->rx_eapol_key_secure) {
2402 /*
2403 * It looks like Windows 7 supplicant tries to use
2404 * Secure bit in msg 2/4 after having reported Michael
2405 * MIC failure and it then rejects the 4-way handshake
2406 * if msg 3/4 does not set Secure bit. Work around this
2407 * by setting the Secure bit here even in the case of
2408 * WPA if the supplicant used it first.
2409 */
2410 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2411 "STA used Secure bit in WPA msg 2/4 - "
2412 "set Secure for 3/4 as workaround");
0d442aff
JM		 2413 secure = 1;
2414 }
6fc6879b
JM		 2415 }
2416
2417 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2418 if (gtk)
2419 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
26e23750 2420#ifdef CONFIG_IEEE80211R
86dfabb8
JM		 2421 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2422 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2423 kde_len += 300; /* FTIE + 2 * TIE */
2424 }
26e23750 2425#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 2426#ifdef CONFIG_P2P
2427 if (WPA_GET_BE32(sm->ip_addr) > 0)
2428 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2429#endif /* CONFIG_P2P */
6fc6879b
JM		 2430 kde = os_malloc(kde_len);
2431 if (kde == NULL)
2432 return;
2433
2434 pos = kde;
2435 os_memcpy(pos, wpa_ie, wpa_ie_len);
2436 pos += wpa_ie_len;
26e23750
JM		 2437#ifdef CONFIG_IEEE80211R
2438 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 2439 int res;
2440 size_t elen;
2441
2442 elen = pos - kde;
2443 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 2444 if (res < 0) {
2445 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2446 "PMKR1Name into RSN IE in EAPOL-Key data");
2447 os_free(kde);
2448 return;
2449 }
59e78c24
JM		 2450 pos -= wpa_ie_len;
2451 pos += elen;
26e23750
JM		 2452 }
2453#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 2454 if (gtk) {
2455 u8 hdr[2];
2456 hdr[0] = keyidx & 0x03;
2457 hdr[1] = 0;
2458 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2459 gtk, gtk_len);
2460 }
2461 pos = ieee80211w_kde_add(sm, pos);
2462
86dfabb8
JM		 2463#ifdef CONFIG_IEEE80211R
2464 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2465 int res;
2466 struct wpa_auth_config *conf;
2467
2468 conf = &sm->wpa_auth->conf;
9257610a
JM		 2469 if (sm->assoc_resp_ftie &&
2470 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
2471 os_memcpy(pos, sm->assoc_resp_ftie,
2472 2 + sm->assoc_resp_ftie[1]);
2473 res = 2 + sm->assoc_resp_ftie[1];
2474 } else {
2475 res = wpa_write_ftie(conf, conf->r0_key_holder,
2476 conf->r0_key_holder_len,
2477 NULL, NULL, pos,
2478 kde + kde_len - pos,
2479 NULL, 0);
2480 }
86dfabb8
JM		 2481 if (res < 0) {
2482 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2483 "into EAPOL-Key Key Data");
2484 os_free(kde);
2485 return;
2486 }
2487 pos += res;
2488
2489 /* TIE[ReassociationDeadline] (TU) */
2490 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2491 *pos++ = 5;
2492 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2493 WPA_PUT_LE32(pos, conf->reassociation_deadline);
2494 pos += 4;
2495
2496 /* TIE[KeyLifetime] (seconds) */
2497 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2498 *pos++ = 5;
2499 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2500 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2501 pos += 4;
2502 }
2503#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 2504#ifdef CONFIG_P2P
2505 if (WPA_GET_BE32(sm->ip_addr) > 0) {
2506 u8 addr[3 * 4];
2507 os_memcpy(addr, sm->ip_addr, 4);
2508 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2509 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2510 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2511 addr, sizeof(addr), NULL, 0);
2512 }
2513#endif /* CONFIG_P2P */
86dfabb8 2514
6fc6879b 2515 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d
JM		 2516 (secure ? WPA_KEY_INFO_SECURE : 0) |
2517 (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 2518 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2519 WPA_KEY_INFO_KEY_TYPE,
2520 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2521 os_free(kde);
6fc6879b
JM		 2522}
2523
2524
2525SM_STATE(WPA_PTK, PTKINITDONE)
2526{
2527 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2528 sm->EAPOLKeyReceived = FALSE;
2529 if (sm->Pair) {
c3550295
JM		 2530 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2531 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 2532 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 2533 sm->PTK.tk, klen)) {
6fc6879b
JM		 2534 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2535 return;
2536 }
2537 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2538 sm->pairwise_set = TRUE;
2539
581a8cde
JM		 2540 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2541 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2542 eloop_register_timeout(sm->wpa_auth->conf.
2543 wpa_ptk_rekey, 0, wpa_rekey_ptk,
2544 sm->wpa_auth, sm);
2545 }
2546
56586197 2547 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2548 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2549 WPA_EAPOL_authorized, 1);
2550 }
2551 }
2552
2553 if (0 /* IBSS == TRUE */) {
2554 sm->keycount++;
2555 if (sm->keycount == 2) {
2556 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2557 WPA_EAPOL_portValid, 1);
2558 }
2559 } else {
2560 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2561 1);
2562 }
2563 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2564 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2565 if (sm->wpa == WPA_VERSION_WPA)
2566 sm->PInitAKeys = TRUE;
2567 else
2568 sm->has_GTK = TRUE;
2569 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2570 "pairwise key handshake completed (%s)",
2571 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2572
2573#ifdef CONFIG_IEEE80211R
2574 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2575#endif /* CONFIG_IEEE80211R */
2576}
2577
2578
2579SM_STEP(WPA_PTK)
2580{
2581 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2582
2583 if (sm->Init)
2584 SM_ENTER(WPA_PTK, INITIALIZE);
2585 else if (sm->Disconnect
1aae01fc
BG		 2586 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2587 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2588 "WPA_PTK: sm->Disconnect");
6fc6879b 2589 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 2590 }
6fc6879b
JM		 2591 else if (sm->DeauthenticationRequest)
2592 SM_ENTER(WPA_PTK, DISCONNECTED);
2593 else if (sm->AuthenticationRequest)
2594 SM_ENTER(WPA_PTK, AUTHENTICATION);
2595 else if (sm->ReAuthenticationRequest)
2596 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2597 else if (sm->PTKRequest)
2598 SM_ENTER(WPA_PTK, PTKSTART);
2599 else switch (sm->wpa_ptk_state) {
2600 case WPA_PTK_INITIALIZE:
2601 break;
2602 case WPA_PTK_DISCONNECT:
2603 SM_ENTER(WPA_PTK, DISCONNECTED);
2604 break;
2605 case WPA_PTK_DISCONNECTED:
2606 SM_ENTER(WPA_PTK, INITIALIZE);
2607 break;
2608 case WPA_PTK_AUTHENTICATION:
2609 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2610 break;
2611 case WPA_PTK_AUTHENTICATION2:
56586197 2612 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 2613 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2614 WPA_EAPOL_keyRun) > 0)
2615 SM_ENTER(WPA_PTK, INITPMK);
56586197 2616 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 2617 /* FIX: && 802.1X::keyRun */)
2618 SM_ENTER(WPA_PTK, INITPSK);
2619 break;
2620 case WPA_PTK_INITPMK:
2621 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2622 WPA_EAPOL_keyAvailable) > 0)
2623 SM_ENTER(WPA_PTK, PTKSTART);
2624 else {
2625 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2626 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2627 "INITPMK - keyAvailable = false");
6fc6879b
JM		 2628 SM_ENTER(WPA_PTK, DISCONNECT);
2629 }
2630 break;
2631 case WPA_PTK_INITPSK:
759fd76b
JM		 2632 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2633 NULL))
6fc6879b
JM		 2634 SM_ENTER(WPA_PTK, PTKSTART);
2635 else {
2636 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2637 "no PSK configured for the STA");
2638 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2639 SM_ENTER(WPA_PTK, DISCONNECT);
2640 }
2641 break;
2642 case WPA_PTK_PTKSTART:
2643 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2644 sm->EAPOLKeyPairwise)
2645 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2646 else if (sm->TimeoutCtr >
2647 (int) dot11RSNAConfigPairwiseUpdateCount) {
2648 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2649 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2650 "PTKSTART: Retry limit %d reached",
2651 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2652 SM_ENTER(WPA_PTK, DISCONNECT);
2653 } else if (sm->TimeoutEvt)
2654 SM_ENTER(WPA_PTK, PTKSTART);
2655 break;
2656 case WPA_PTK_PTKCALCNEGOTIATING:
2657 if (sm->MICVerified)
2658 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2659 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2660 sm->EAPOLKeyPairwise)
2661 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2662 else if (sm->TimeoutEvt)
2663 SM_ENTER(WPA_PTK, PTKSTART);
2664 break;
2665 case WPA_PTK_PTKCALCNEGOTIATING2:
2666 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2667 break;
2668 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 2669 if (sm->update_snonce)
2670 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2671 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2672 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 2673 SM_ENTER(WPA_PTK, PTKINITDONE);
2674 else if (sm->TimeoutCtr >
2675 (int) dot11RSNAConfigPairwiseUpdateCount) {
2676 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2677 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2678 "PTKINITNEGOTIATING: Retry limit %d "
2679 "reached",
2680 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2681 SM_ENTER(WPA_PTK, DISCONNECT);
2682 } else if (sm->TimeoutEvt)
2683 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2684 break;
2685 case WPA_PTK_PTKINITDONE:
2686 break;
2687 }
2688}
2689
2690
2691SM_STATE(WPA_PTK_GROUP, IDLE)
2692{
2693 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2694 if (sm->Init) {
2695 /* Init flag is not cleared here, so avoid busy
2696 * loop by claiming nothing changed. */
2697 sm->changed = FALSE;
2698 }
2699 sm->GTimeoutCtr = 0;
2700}
2701
2702
2703SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2704{
2705 u8 rsc[WPA_KEY_RSC_LEN];
2706 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 2707 const u8 *kde;
2708 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 2709 size_t kde_len;
83421850 2710 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 2711
2712 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 2713
2714 sm->GTimeoutCtr++;
2715 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2716 /* No point in sending the EAPOL-Key - we will disconnect
2717 * immediately following this. */
2718 return;
2719 }
2720
6fc6879b
JM		 2721 if (sm->wpa == WPA_VERSION_WPA)
2722 sm->PInitAKeys = FALSE;
2723 sm->TimeoutEvt = FALSE;
2724 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2725 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2726 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2727 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2728 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2729 "sending 1/2 msg of Group Key Handshake");
2730
83421850
JM		 2731 gtk = gsm->GTK[gsm->GN - 1];
2732 if (sm->wpa_auth->conf.disable_gtk) {
2733 /*
2734 * Provide unique random GTK to each STA to prevent use
2735 * of GTK in the BSS.
2736 */
2737 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
2738 return;
2739 gtk = dummy_gtk;
2740 }
6fc6879b
JM		 2741 if (sm->wpa == WPA_VERSION_WPA2) {
2742 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2743 ieee80211w_kde_len(sm);
e41e4f9e
JM		 2744 kde_buf = os_malloc(kde_len);
2745 if (kde_buf == NULL)
6fc6879b
JM		 2746 return;
2747
e41e4f9e 2748 kde = pos = kde_buf;
6fc6879b
JM		 2749 hdr[0] = gsm->GN & 0x03;
2750 hdr[1] = 0;
2751 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 2752 gtk, gsm->GTK_len);
6fc6879b 2753 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 2754 kde_len = pos - kde;
6fc6879b 2755 } else {
83421850 2756 kde = gtk;
e41e4f9e 2757 kde_len = gsm->GTK_len;
6fc6879b
JM		 2758 }
2759
2760 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d
JM		 2761 WPA_KEY_INFO_SECURE |
2762 (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 2763 WPA_KEY_INFO_ACK |
2764 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
e41e4f9e
JM		 2765 rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1);
2766
2767 os_free(kde_buf);
6fc6879b
JM		 2768}
2769
2770
2771SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2772{
2773 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2774 sm->EAPOLKeyReceived = FALSE;
2775 if (sm->GUpdateStationKeys)
2776 sm->group->GKeyDoneStations--;
2777 sm->GUpdateStationKeys = FALSE;
2778 sm->GTimeoutCtr = 0;
2779 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2780 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2781 "group key handshake completed (%s)",
2782 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2783 sm->has_GTK = TRUE;
2784}
2785
2786
2787SM_STATE(WPA_PTK_GROUP, KEYERROR)
2788{
2789 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2790 if (sm->GUpdateStationKeys)
2791 sm->group->GKeyDoneStations--;
2792 sm->GUpdateStationKeys = FALSE;
2793 sm->Disconnect = TRUE;
2794}
2795
2796
2797SM_STEP(WPA_PTK_GROUP)
2798{
9663596f 2799 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 2800 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 2801 sm->PtkGroupInit = FALSE;
2802 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 2803 case WPA_PTK_GROUP_IDLE:
2804 if (sm->GUpdateStationKeys ||
2805 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2806 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2807 break;
2808 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2809 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2810 !sm->EAPOLKeyPairwise && sm->MICVerified)
2811 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2812 else if (sm->GTimeoutCtr >
2813 (int) dot11RSNAConfigGroupUpdateCount)
2814 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2815 else if (sm->TimeoutEvt)
2816 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2817 break;
2818 case WPA_PTK_GROUP_KEYERROR:
2819 SM_ENTER(WPA_PTK_GROUP, IDLE);
2820 break;
2821 case WPA_PTK_GROUP_REKEYESTABLISHED:
2822 SM_ENTER(WPA_PTK_GROUP, IDLE);
2823 break;
2824 }
2825}
2826
2827
2828static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2829 struct wpa_group *group)
2830{
2831 int ret = 0;
2832
6fc6879b
JM		 2833 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2834 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2835 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2836 wpa_auth->addr, group->GNonce,
2837 group->GTK[group->GN - 1], group->GTK_len) < 0)
2838 ret = -1;
5cb9d5c3
JM		 2839 wpa_hexdump_key(MSG_DEBUG, "GTK",
2840 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 2841
2842#ifdef CONFIG_IEEE80211W
70f8cc8e 2843 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 2844 size_t len;
2845 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 2846 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2847 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2848 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2849 wpa_auth->addr, group->GNonce,
8dd9f9cd 2850 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 2851 ret = -1;
6fc6879b 2852 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 2853 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 2854 }
2855#endif /* CONFIG_IEEE80211W */
2856
2857 return ret;
2858}
2859
2860
2861static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2862 struct wpa_group *group)
2863{
2864 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2865 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2866 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2867 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2868
2869 /* GTK[0..N] = 0 */
2870 os_memset(group->GTK, 0, sizeof(group->GTK));
2871 group->GN = 1;
2872 group->GM = 2;
2873#ifdef CONFIG_IEEE80211W
2874 group->GN_igtk = 4;
2875 group->GM_igtk = 5;
2876#endif /* CONFIG_IEEE80211W */
2877 /* GTK[GN] = CalcGTK() */
2878 wpa_gtk_update(wpa_auth, group);
2879}
2880
2881
2882static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2883{
473b6f22
MB		 2884 if (ctx != NULL && ctx != sm->group)
2885 return 0;
2886
6fc6879b
JM		 2887 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2888 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2889 "Not in PTKINITDONE; skip Group Key update");
3c183894 2890 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 2891 return 0;
2892 }
9663596f
JM		 2893 if (sm->GUpdateStationKeys) {
2894 /*
3c183894
JM		 2895 * This should not really happen, so add a debug log entry.
2896 * Since we clear the GKeyDoneStations before the loop, the
2897 * station needs to be counted here anyway.
9663596f
JM		 2898 */
2899 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 2900 "GUpdateStationKeys was already set when "
2901 "marking station for GTK rekeying");
9663596f 2902 }
3c183894 2903
ad3872a3 2904 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 2905 if (sm->is_wnmsleep)
2906 return 0;
d32d94db 2907
3c183894
JM		 2908 sm->group->GKeyDoneStations++;
2909 sm->GUpdateStationKeys = TRUE;
2910
6fc6879b
JM		 2911 wpa_sm_step(sm);
2912 return 0;
2913}
2914
2915
ad3872a3
JM		 2916#ifdef CONFIG_WNM
2917/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 2918void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
2919{
629edfef 2920 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 2921 return;
2922
2923 wpa_group_update_sta(sm, NULL);
2924}
2925
2926
2927void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
2928{
629edfef
JM		 2929 if (sm)
2930 sm->is_wnmsleep = !!flag;
d32d94db
XC		 2931}
2932
2933
2934int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2935{
d32d94db 2936 struct wpa_group *gsm = sm->group;
835822d4 2937 u8 *start = pos;
d32d94db
XC		 2938
2939 /*
835822d4 2940 * GTK subelement:
d32d94db 2941 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 2942 * Key[5..32]
d32d94db 2943 */
835822d4
JM		 2944 *pos++ = WNM_SLEEP_SUBELEM_GTK;
2945 *pos++ = 11 + gsm->GTK_len;
d32d94db 2946 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 2947 WPA_PUT_LE16(pos, gsm->GN & 0x03);
2948 pos += 2;
2949 *pos++ = gsm->GTK_len;
2950 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 2951 return 0;
835822d4
JM		 2952 pos += 8;
2953 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2954 pos += gsm->GTK_len;
d32d94db 2955
835822d4
JM		 2956 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
2957 gsm->GN);
2958 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 2959 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 2960
835822d4 2961 return pos - start;
d32d94db
XC		 2962}
2963
2964
2965#ifdef CONFIG_IEEE80211W
2966int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2967{
d32d94db 2968 struct wpa_group *gsm = sm->group;
835822d4 2969 u8 *start = pos;
8dd9f9cd 2970 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 2971
835822d4
JM		 2972 /*
2973 * IGTK subelement:
2974 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
2975 */
2976 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 2977 *pos++ = 2 + 6 + len;
835822d4
JM		 2978 WPA_PUT_LE16(pos, gsm->GN_igtk);
2979 pos += 2;
2980 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 2981 return 0;
835822d4 2982 pos += 6;
d32d94db 2983
8dd9f9cd
JM		 2984 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
2985 pos += len;
d32d94db 2986
835822d4
JM		 2987 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
2988 gsm->GN_igtk);
2989 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 2990 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 2991
835822d4 2992 return pos - start;
d32d94db
XC		 2993}
2994#endif /* CONFIG_IEEE80211W */
ad3872a3 2995#endif /* CONFIG_WNM */
d32d94db
XC		 2996
2997
6fc6879b
JM		 2998static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2999 struct wpa_group *group)
3000{
3001 int tmp;
3002
3003 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3004 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3005 group->changed = TRUE;
3006 group->wpa_group_state = WPA_GROUP_SETKEYS;
3007 group->GTKReKey = FALSE;
3008 tmp = group->GM;
3009 group->GM = group->GN;
3010 group->GN = tmp;
3011#ifdef CONFIG_IEEE80211W
3012 tmp = group->GM_igtk;
3013 group->GM_igtk = group->GN_igtk;
3014 group->GN_igtk = tmp;
3015#endif /* CONFIG_IEEE80211W */
3016 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3017 * counting the STAs that are marked with GUpdateStationKeys instead of
3018 * including all STAs that could be in not-yet-completed state. */
3019 wpa_gtk_update(wpa_auth, group);
3020
3c183894
JM		 3021 if (group->GKeyDoneStations) {
3022 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3023 "GKeyDoneStations=%d when starting new GTK rekey",
3024 group->GKeyDoneStations);
3025 group->GKeyDoneStations = 0;
3026 }
473b6f22 3027 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3028 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3029 group->GKeyDoneStations);
3030}
3031
3032
1bdb7ab3
JM		 3033static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3034 struct wpa_group *group)
6fc6879b 3035{
3c7302c2
JM		 3036 int ret = 0;
3037
3c7302c2 3038 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3039 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3040 broadcast_ether_addr, group->GN,
3041 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3042 ret = -1;
6fc6879b
JM		 3043
3044#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3045 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3046 enum wpa_alg alg;
3047 size_t len;
3048
3049 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3050 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3051
3052 if (ret == 0 &&
3053 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3054 broadcast_ether_addr, group->GN_igtk,
3055 group->IGTK[group->GN_igtk - 4], len) < 0)
3056 ret = -1;
3057 }
6fc6879b 3058#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3059
3060 return ret;
6fc6879b
JM		 3061}
3062
3063
7d7f7be2
JM		 3064static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3065{
3066 if (sm->group == ctx) {
3067 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3068 " for discconnection due to fatal failure",
3069 MAC2STR(sm->addr));
3070 sm->Disconnect = TRUE;
3071 }
3072
3073 return 0;
3074}
3075
3076
3077static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3078 struct wpa_group *group)
3079{
3080 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3081 group->changed = TRUE;
3082 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3083 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3084}
3085
3086
1bdb7ab3
JM		 3087static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3088 struct wpa_group *group)
3089{
3090 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3091 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3092 group->changed = TRUE;
3093 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3094
7d7f7be2
JM		 3095 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3096 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3097 return -1;
7d7f7be2 3098 }
1bdb7ab3
JM		 3099
3100 return 0;
3101}
3102
3103
6fc6879b
JM		 3104static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3105 struct wpa_group *group)
3106{
3107 if (group->GInit) {
3108 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3109 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3110 /* Do not allow group operations */
6fc6879b
JM		 3111 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3112 group->GTKAuthenticator) {
3113 wpa_group_setkeysdone(wpa_auth, group);
3114 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3115 group->GTKReKey) {
3116 wpa_group_setkeys(wpa_auth, group);
3117 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3118 if (group->GKeyDoneStations == 0)
3119 wpa_group_setkeysdone(wpa_auth, group);
3120 else if (group->GTKReKey)
3121 wpa_group_setkeys(wpa_auth, group);
3122 }
3123}
3124
3125
e4a6ea1d 3126static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 3127{
3128 if (sm == NULL)
e4a6ea1d 3129 return 0;
6fc6879b
JM		 3130
3131 if (sm->in_step_loop) {
3132 /* This should not happen, but if it does, make sure we do not
3133 * end up freeing the state machine too early by exiting the
3134 * recursive call. */
3135 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 3136 return 0;
6fc6879b
JM		 3137 }
3138
3139 sm->in_step_loop = 1;
3140 do {
3141 if (sm->pending_deinit)
3142 break;
3143
3144 sm->changed = FALSE;
3145 sm->wpa_auth->group->changed = FALSE;
3146
3147 SM_STEP_RUN(WPA_PTK);
3148 if (sm->pending_deinit)
3149 break;
3150 SM_STEP_RUN(WPA_PTK_GROUP);
3151 if (sm->pending_deinit)
3152 break;
3153 wpa_group_sm_step(sm->wpa_auth, sm->group);
3154 } while (sm->changed || sm->wpa_auth->group->changed);
3155 sm->in_step_loop = 0;
3156
3157 if (sm->pending_deinit) {
3158 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3159 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3160 wpa_free_sta_sm(sm);
e4a6ea1d 3161 return 1;
6fc6879b 3162 }
e4a6ea1d 3163 return 0;
6fc6879b
JM		 3164}
3165
3166
3167static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3168{
3169 struct wpa_state_machine *sm = eloop_ctx;
3170 wpa_sm_step(sm);
3171}
3172
3173
3174void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3175{
3176 if (sm == NULL)
3177 return;
3178 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3179}
3180
3181
3182void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3183{
3184 int tmp, i;
3185 struct wpa_group *group;
3186
3187 if (wpa_auth == NULL)
3188 return;
3189
3190 group = wpa_auth->group;
3191
3192 for (i = 0; i < 2; i++) {
3193 tmp = group->GM;
3194 group->GM = group->GN;
3195 group->GN = tmp;
3196#ifdef CONFIG_IEEE80211W
3197 tmp = group->GM_igtk;
3198 group->GM_igtk = group->GN_igtk;
3199 group->GN_igtk = tmp;
3200#endif /* CONFIG_IEEE80211W */
3201 wpa_gtk_update(wpa_auth, group);
9354e594 3202 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 3203 }
3204}
3205
3206
a6da824b 3207static const char * wpa_bool_txt(int val)
6fc6879b 3208{
a6da824b 3209 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 3210}
3211
3212
6fc6879b
JM		 3213#define RSN_SUITE "%02x-%02x-%02x-%d"
3214#define RSN_SUITE_ARG(s) \
3215((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3216
3217int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3218{
3219 int len = 0, ret;
3220 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 3221#ifdef CONFIG_RSN_PREAUTH
3222 const int preauth = 1;
3223#else /* CONFIG_RSN_PREAUTH */
3224 const int preauth = 0;
3225#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 3226
3227 if (wpa_auth == NULL)
3228 return len;
3229
3230 ret = os_snprintf(buf + len, buflen - len,
3231 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 3232 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 3233 "dot11RSNAEnabled=%s\n"
3234 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 3235 wpa_bool_txt(preauth),
6fc6879b
JM		 3236 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3237 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 3238 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3239 return len;
3240 len += ret;
3241
3242 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3243 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3244
3245 ret = os_snprintf(
3246 buf + len, buflen - len,
3247 "dot11RSNAConfigVersion=%u\n"
3248 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3249 /* FIX: dot11RSNAConfigGroupCipher */
3250 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3251 /* FIX: dot11RSNAConfigGroupRekeyTime */
3252 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3253 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3254 "dot11RSNAConfigGroupUpdateCount=%u\n"
3255 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3256 "dot11RSNAConfigGroupCipherSize=%u\n"
3257 "dot11RSNAConfigPMKLifetime=%u\n"
3258 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3259 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3260 "dot11RSNAConfigSATimeout=%u\n"
3261 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3262 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3263 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3264 "dot11RSNAPMKIDUsed=%s\n"
3265 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3266 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3267 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3268 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3269 "dot11RSNA4WayHandshakeFailures=%u\n"
3270 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3271 RSN_VERSION,
3272 !!wpa_auth->conf.wpa_strict_rekey,
3273 dot11RSNAConfigGroupUpdateCount,
3274 dot11RSNAConfigPairwiseUpdateCount,
c3550295 3275 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 3276 dot11RSNAConfigPMKLifetime,
3277 dot11RSNAConfigPMKReauthThreshold,
3278 dot11RSNAConfigSATimeout,
3279 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3280 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3281 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3282 pmkid_txt,
3283 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3284 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3285 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3286 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3287 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 3288 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3289 return len;
3290 len += ret;
3291
3292 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3293 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3294
3295 /* Private MIB */
3296 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3297 wpa_auth->group->wpa_group_state);
d85e1fc8 3298 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3299 return len;
3300 len += ret;
3301
3302 return len;
3303}
3304
3305
3306int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3307{
3308 int len = 0, ret;
3309 u32 pairwise = 0;
3310
3311 if (sm == NULL)
3312 return 0;
3313
3314 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3315
3316 /* dot11RSNAStatsEntry */
3317
c3550295
JM		 3318 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3319 WPA_PROTO_RSN : WPA_PROTO_WPA,
3320 sm->pairwise);
3321 if (pairwise == 0)
6fc6879b
JM		 3322 return 0;
3323
3324 ret = os_snprintf(
3325 buf + len, buflen - len,
3326 /* TODO: dot11RSNAStatsIndex */
3327 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3328 "dot11RSNAStatsVersion=1\n"
3329 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3330 /* TODO: dot11RSNAStatsTKIPICVErrors */
3331 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 3332 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 3333 /* TODO: dot11RSNAStatsCCMPReplays */
3334 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3335 /* TODO: dot11RSNAStatsTKIPReplays */,
3336 MAC2STR(sm->addr),
3337 RSN_SUITE_ARG(pairwise),
3338 sm->dot11RSNAStatsTKIPLocalMICFailures,
3339 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 3340 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3341 return len;
3342 len += ret;
3343
3344 /* Private MIB */
3345 ret = os_snprintf(buf + len, buflen - len,
3346 "hostapdWPAPTKState=%d\n"
3347 "hostapdWPAPTKGroupState=%d\n",
3348 sm->wpa_ptk_state,
3349 sm->wpa_ptk_group_state);
d85e1fc8 3350 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3351 return len;
3352 len += ret;
3353
3354 return len;
3355}
3356
3357
3358void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3359{
3360 if (wpa_auth)
3361 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3362}
3363
3364
3365int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3366{
3367 return sm && sm->pairwise_set;
3368}
3369
3370
ff36ff00
JM		 3371int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3372{
3373 return sm->pairwise;
3374}
3375
3376
6fc6879b
JM		 3377int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3378{
3379 if (sm == NULL)
3380 return -1;
3381 return sm->wpa_key_mgmt;
3382}
3383
3384
3385int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3386{
3387 if (sm == NULL)
3388 return 0;
3389 return sm->wpa;
3390}
3391
3392
3393int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3394 struct rsn_pmksa_cache_entry *entry)
3395{
3396 if (sm == NULL || sm->pmksa != entry)
3397 return -1;
3398 sm->pmksa = NULL;
3399 return 0;
3400}
3401
3402
3403struct rsn_pmksa_cache_entry *
3404wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3405{
3406 return sm ? sm->pmksa : NULL;
3407}
3408
3409
3410void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3411{
3412 if (sm)
3413 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3414}
3415
3416
3417const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3418{
3419 if (wpa_auth == NULL)
3420 return NULL;
3421 *len = wpa_auth->wpa_ie_len;
3422 return wpa_auth->wpa_ie;
3423}
3424
3425
3426int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 3427 unsigned int pmk_len,
6fc6879b
JM		 3428 int session_timeout, struct eapol_state_machine *eapol)
3429{
cb465555
JM		 3430 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3431 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 3432 return -1;
3433
207976f0
JM		 3434 if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) {
3435 if (pmk_len > PMK_LEN_SUITE_B_192)
3436 pmk_len = PMK_LEN_SUITE_B_192;
3437 } else if (pmk_len > PMK_LEN) {
3438 pmk_len = PMK_LEN;
3439 }
3440
70c93963 3441 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 3442 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 3443 sm->wpa_auth->addr, sm->addr, session_timeout,
3444 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 3445 return 0;
3446
3447 return -1;
3448}
3449
3450
3451int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3452 const u8 *pmk, size_t len, const u8 *sta_addr,
3453 int session_timeout,
3454 struct eapol_state_machine *eapol)
3455{
3456 if (wpa_auth == NULL)
3457 return -1;
3458
70c93963 3459 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 3460 NULL, 0,
3461 wpa_auth->addr,
4bb081f1
JM		 3462 sta_addr, session_timeout, eapol,
3463 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 3464 return 0;
3465
3466 return -1;
3467}
3468
3469
f2991170 3470int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 3471 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 3472{
3473 if (wpa_auth->conf.disable_pmksa_caching)
3474 return -1;
3475
70c93963 3476 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 3477 NULL, 0,
f2991170
JM		 3478 wpa_auth->addr, addr, 0, NULL,
3479 WPA_KEY_MGMT_SAE))
3480 return 0;
3481
3482 return -1;
3483}
3484
3485
901d1fe1
JM		 3486void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3487 const u8 *sta_addr)
3488{
3489 struct rsn_pmksa_cache_entry *pmksa;
3490
3491 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3492 return;
3493 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3494 if (pmksa) {
3495 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3496 MACSTR " based on request", MAC2STR(sta_addr));
3497 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3498 }
3499}
3500
3501
b8daac18
MH		 3502int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
3503 size_t len)
3504{
3505 if (!wpa_auth || !wpa_auth->pmksa)
3506 return 0;
3507 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
3508}
3509
3510
4c522c77
MH		 3511void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
3512{
3513 if (wpa_auth && wpa_auth->pmksa)
3514 pmksa_cache_auth_flush(wpa_auth->pmksa);
3515}
3516
3517
9f2cf23e
MH		 3518struct rsn_pmksa_cache_entry *
3519wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
3520{
3521 if (!wpa_auth || !wpa_auth->pmksa)
3522 return NULL;
3523 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3524}
3525
3526
3527void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
3528 struct wpa_state_machine *sm,
3529 struct wpa_authenticator *wpa_auth,
3530 u8 *pmkid, u8 *pmk)
3531{
3532 if (!sm)
3533 return;
3534
3535 sm->pmksa = pmksa;
8854f90b
JM		 3536 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
3537 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
3538 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 3539}
3540
3541
a0ad9e8c
MB		 3542/*
3543 * Remove and free the group from wpa_authenticator. This is triggered by a
3544 * callback to make sure nobody is currently iterating the group list while it
3545 * gets modified.
3546 */
3547static void wpa_group_free(struct wpa_authenticator *wpa_auth,
3548 struct wpa_group *group)
3549{
3550 struct wpa_group *prev = wpa_auth->group;
3551
3552 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
3553 group->vlan_id);
3554
3555 while (prev) {
3556 if (prev->next == group) {
3557 /* This never frees the special first group as needed */
3558 prev->next = group->next;
3559 os_free(group);
3560 break;
3561 }
3562 prev = prev->next;
3563 }
3564
3565}
3566
3567
3568/* Increase the reference counter for group */
3569static void wpa_group_get(struct wpa_authenticator *wpa_auth,
3570 struct wpa_group *group)
3571{
3572 /* Skip the special first group */
3573 if (wpa_auth->group == group)
3574 return;
3575
3576 group->references++;
3577}
3578
3579
3580/* Decrease the reference counter and maybe free the group */
3581static void wpa_group_put(struct wpa_authenticator *wpa_auth,
3582 struct wpa_group *group)
3583{
3584 /* Skip the special first group */
3585 if (wpa_auth->group == group)
3586 return;
3587
3588 group->references--;
3589 if (group->references)
3590 return;
3591 wpa_group_free(wpa_auth, group);
3592}
3593
3594
3595/*
3596 * Add a group that has its references counter set to zero. Caller needs to
3597 * call wpa_group_get() on the return value to mark the entry in use.
3598 */
6fc6879b
JM		 3599static struct wpa_group *
3600wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3601{
3602 struct wpa_group *group;
3603
3604 if (wpa_auth == NULL || wpa_auth->group == NULL)
3605 return NULL;
3606
3607 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
3608 vlan_id);
bdffdc5d 3609 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 3610 if (group == NULL)
3611 return NULL;
3612
3613 group->next = wpa_auth->group->next;
3614 wpa_auth->group->next = group;
3615
3616 return group;
3617}
3618
3619
7cebc8e2
MB		 3620/*
3621 * Enforce that the group state machine for the VLAN is running, increase
3622 * reference counter as interface is up. References might have been increased
3623 * even if a negative value is returned.
3624 * Returns: -1 on error (group missing, group already failed); otherwise, 0
3625 */
3626int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3627{
3628 struct wpa_group *group;
3629
3630 if (wpa_auth == NULL)
3631 return 0;
3632
3633 group = wpa_auth->group;
3634 while (group) {
3635 if (group->vlan_id == vlan_id)
3636 break;
3637 group = group->next;
3638 }
3639
3640 if (group == NULL) {
3641 group = wpa_auth_add_group(wpa_auth, vlan_id);
3642 if (group == NULL)
3643 return -1;
3644 }
3645
3646 wpa_printf(MSG_DEBUG,
3647 "WPA: Ensure group state machine running for VLAN ID %d",
3648 vlan_id);
3649
3650 wpa_group_get(wpa_auth, group);
3651 group->num_setup_iface++;
3652
3653 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3654 return -1;
3655
3656 return 0;
3657}
3658
3659
3660/*
3661 * Decrease reference counter, expected to be zero afterwards.
3662 * returns: -1 on error (group not found, group in fail state)
3663 * -2 if wpa_group is still referenced
3664 * 0 else
3665 */
3666int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3667{
3668 struct wpa_group *group;
3669 int ret = 0;
3670
3671 if (wpa_auth == NULL)
3672 return 0;
3673
3674 group = wpa_auth->group;
3675 while (group) {
3676 if (group->vlan_id == vlan_id)
3677 break;
3678 group = group->next;
3679 }
3680
3681 if (group == NULL)
3682 return -1;
3683
3684 wpa_printf(MSG_DEBUG,
3685 "WPA: Try stopping group state machine for VLAN ID %d",
3686 vlan_id);
3687
3688 if (group->num_setup_iface <= 0) {
3689 wpa_printf(MSG_ERROR,
3690 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
3691 vlan_id);
3692 return -1;
3693 }
3694 group->num_setup_iface--;
3695
3696 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3697 ret = -1;
3698
3699 if (group->references > 1) {
3700 wpa_printf(MSG_DEBUG,
3701 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
3702 vlan_id);
3703 ret = -2;
3704 }
3705
3706 wpa_group_put(wpa_auth, group);
3707
3708 return ret;
3709}
3710
3711
6fc6879b
JM		 3712int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
3713{
3714 struct wpa_group *group;
3715
3716 if (sm == NULL || sm->wpa_auth == NULL)
3717 return 0;
3718
3719 group = sm->wpa_auth->group;
3720 while (group) {
3721 if (group->vlan_id == vlan_id)
3722 break;
3723 group = group->next;
3724 }
3725
3726 if (group == NULL) {
3727 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
3728 if (group == NULL)
3729 return -1;
3730 }
3731
3732 if (sm->group == group)
3733 return 0;
3734
7d7f7be2
JM		 3735 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3736 return -1;
3737
6fc6879b
JM		 3738 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
3739 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
3740
a0ad9e8c
MB		 3741 wpa_group_get(sm->wpa_auth, group);
3742 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 3743 sm->group = group;
a0ad9e8c 3744
6fc6879b
JM		 3745 return 0;
3746}
e4bf4db9
JM		 3747
3748
3749void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
3750 struct wpa_state_machine *sm, int ack)
3751{
3752 if (wpa_auth == NULL || sm == NULL)
3753 return;
3754 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
3755 " ack=%d", MAC2STR(sm->addr), ack);
3756 if (sm->pending_1_of_4_timeout && ack) {
3757 /*
3758 * Some deployed supplicant implementations update their SNonce
3759 * for each EAPOL-Key 2/4 message even within the same 4-way
3760 * handshake and then fail to use the first SNonce when
3761 * deriving the PTK. This results in unsuccessful 4-way
3762 * handshake whenever the relatively short initial timeout is
3763 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
3764 * around this by increasing the timeout now that we know that
3765 * the station has received the frame.
3766 */
3767 int timeout_ms = eapol_key_timeout_subseq;
3768 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
3769 "timeout by %u ms because of acknowledged frame",
3770 timeout_ms);
3771 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
3772 eloop_register_timeout(timeout_ms / 1000,
3773 (timeout_ms % 1000) * 1000,
3774 wpa_send_eapol_timeout, wpa_auth, sm);
3775 }
3776}
c10347f2
JM		 3777
3778
3779int wpa_auth_uses_sae(struct wpa_state_machine *sm)
3780{
3781 if (sm == NULL)
3782 return 0;
3783 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
3784}
aa189ac9
JM		 3785
3786
3787int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
3788{
3789 if (sm == NULL)
3790 return 0;
3791 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
3792}
25ef8529
JM		 3793
3794
3795#ifdef CONFIG_P2P
3796int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
3797{
3798 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
3799 return -1;
3800 os_memcpy(addr, sm->ip_addr, 4);
3801 return 0;
3802}
3803#endif /* CONFIG_P2P */
cbc210de
JM		 3804
3805
3806int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
3807 struct radius_das_attrs *attr)
3808{
3809 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
3810}
34782730
JM		 3811
3812
3813void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
3814{
3815 struct wpa_group *group;
3816
3817 if (!wpa_auth)
3818 return;
3819 for (group = wpa_auth->group; group; group = group->next)
3820 wpa_group_config_group_keys(wpa_auth, group);
3821}
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