]> git.ipfire.org Git - thirdparty/hostap.git/blame - src/ap/wpa_auth.c
projects / thirdparty / hostap.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
PMKSA: Show AP/mesh PMKSA list in PMKSA command
[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"
03da66bd
JM		 16#include "crypto/aes_wrap.h"
17#include "crypto/crypto.h"
18#include "crypto/sha1.h"
19#include "crypto/sha256.h"
3642c431 20#include "crypto/random.h"
281c950b 21#include "eapol_auth/eapol_auth_sm.h"
6226e38d 22#include "ap_config.h"
6fc6879b 23#include "ieee802_11.h"
6226e38d
JM		 24#include "wpa_auth.h"
25#include "pmksa_cache_auth.h"
6fc6879b
JM		 26#include "wpa_auth_i.h"
27#include "wpa_auth_ie.h"
28
29#define STATE_MACHINE_DATA struct wpa_state_machine
30#define STATE_MACHINE_DEBUG_PREFIX "WPA"
31#define STATE_MACHINE_ADDR sm->addr
32
33
34static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 35static int wpa_sm_step(struct wpa_state_machine *sm);
929a2ea5
JM		 36static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
37 size_t data_len);
6fc6879b
JM		 38static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
39static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
40 struct wpa_group *group);
581a8cde 41static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 42static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
43 struct wpa_group *group);
1bdb7ab3
JM		 44static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
45 struct wpa_group *group);
f23c5b17 46static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 47 const u8 *pmk, unsigned int pmk_len,
48 struct wpa_ptk *ptk);
a0ad9e8c
MB		 49static void wpa_group_free(struct wpa_authenticator *wpa_auth,
50 struct wpa_group *group);
51static void wpa_group_get(struct wpa_authenticator *wpa_auth,
52 struct wpa_group *group);
53static void wpa_group_put(struct wpa_authenticator *wpa_auth,
54 struct wpa_group *group);
6fc6879b 55
bae61562
JM		 56static const u32 dot11RSNAConfigGroupUpdateCount = 4;
57static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
58static const u32 eapol_key_timeout_first = 100; /* ms */
59static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 60static const u32 eapol_key_timeout_first_group = 500; /* ms */
6fc6879b
JM		 61
62/* TODO: make these configurable */
63static const int dot11RSNAConfigPMKLifetime = 43200;
64static const int dot11RSNAConfigPMKReauthThreshold = 70;
65static const int dot11RSNAConfigSATimeout = 60;
66
67
c772d054 68static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 69 struct wpa_authenticator *wpa_auth, const u8 *addr)
70{
71 if (wpa_auth->cb.mic_failure_report)
c772d054
JM		 72 return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
73 return 0;
6fc6879b
JM		 74}
75
76
2c502460
JM		 77static inline void wpa_auth_psk_failure_report(
78 struct wpa_authenticator *wpa_auth, const u8 *addr)
79{
80 if (wpa_auth->cb.psk_failure_report)
81 wpa_auth->cb.psk_failure_report(wpa_auth->cb.ctx, addr);
82}
83
84
6fc6879b
JM		 85static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
86 const u8 *addr, wpa_eapol_variable var,
87 int value)
88{
89 if (wpa_auth->cb.set_eapol)
90 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
91}
92
93
94static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
95 const u8 *addr, wpa_eapol_variable var)
96{
97 if (wpa_auth->cb.get_eapol == NULL)
98 return -1;
99 return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
100}
101
102
103static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 104 const u8 *addr,
105 const u8 *p2p_dev_addr,
106 const u8 *prev_psk)
6fc6879b
JM		 107{
108 if (wpa_auth->cb.get_psk == NULL)
109 return NULL;
759fd76b
JM		 110 return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
111 prev_psk);
6fc6879b
JM		 112}
113
114
115static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
116 const u8 *addr, u8 *msk, size_t *len)
117{
118 if (wpa_auth->cb.get_msk == NULL)
119 return -1;
120 return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
121}
122
123
124static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
125 int vlan_id,
71934751 126 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 127 u8 *key, size_t key_len)
128{
129 if (wpa_auth->cb.set_key == NULL)
130 return -1;
131 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
132 key, key_len);
133}
134
135
136static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
137 const u8 *addr, int idx, u8 *seq)
138{
139 if (wpa_auth->cb.get_seqnum == NULL)
140 return -1;
141 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
142}
143
144
6fc6879b
JM		 145static inline int
146wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
147 const u8 *data, size_t data_len, int encrypt)
148{
149 if (wpa_auth->cb.send_eapol == NULL)
150 return -1;
151 return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
152 encrypt);
153}
154
155
c50d94f1
BC		 156#ifdef CONFIG_MESH
157static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
158 const u8 *addr)
159{
160 if (wpa_auth->cb.start_ampe == NULL)
161 return -1;
162 return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr);
163}
164#endif /* CONFIG_MESH */
165
166
6fc6879b
JM		 167int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
168 int (*cb)(struct wpa_state_machine *sm, void *ctx),
169 void *cb_ctx)
170{
171 if (wpa_auth->cb.for_each_sta == NULL)
172 return 0;
173 return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
174}
175
176
bf98f7f3
JM		 177int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
178 int (*cb)(struct wpa_authenticator *a, void *ctx),
179 void *cb_ctx)
180{
181 if (wpa_auth->cb.for_each_auth == NULL)
182 return 0;
183 return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
184}
185
186
6fc6879b
JM		 187void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
188 logger_level level, const char *txt)
189{
190 if (wpa_auth->cb.logger == NULL)
191 return;
192 wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
193}
194
195
196void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
197 logger_level level, const char *fmt, ...)
198{
199 char *format;
200 int maxlen;
201 va_list ap;
202
203 if (wpa_auth->cb.logger == NULL)
204 return;
205
206 maxlen = os_strlen(fmt) + 100;
207 format = os_malloc(maxlen);
208 if (!format)
209 return;
210
211 va_start(ap, fmt);
212 vsnprintf(format, maxlen, fmt, ap);
213 va_end(ap);
214
215 wpa_auth_logger(wpa_auth, addr, level, format);
216
217 os_free(format);
218}
219
220
221static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
222 const u8 *addr)
223{
224 if (wpa_auth->cb.disconnect == NULL)
225 return;
afcc9ea1 226 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
6fc6879b
JM		 227 wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
228 WLAN_REASON_PREV_AUTH_NOT_VALID);
229}
230
231
232static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
233{
56586197 234 int ret = 0;
6fc6879b 235#ifdef CONFIG_IEEE80211R
56586197
JM		 236 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
237 ret = 1;
6fc6879b 238#endif /* CONFIG_IEEE80211R */
56586197
JM		 239#ifdef CONFIG_IEEE80211W
240 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
241 ret = 1;
242#endif /* CONFIG_IEEE80211W */
a14896e8
JM		 243 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
244 ret = 1;
56586197 245 return ret;
6fc6879b
JM		 246}
247
248
249static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
250{
251 struct wpa_authenticator *wpa_auth = eloop_ctx;
252
3642c431 253 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 254 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
255 "initialization.");
256 } else {
257 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 258 wpa_hexdump_key(MSG_DEBUG, "GMK",
259 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 260 }
261
262 if (wpa_auth->conf.wpa_gmk_rekey) {
263 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
264 wpa_rekey_gmk, wpa_auth, NULL);
265 }
266}
267
268
269static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
270{
271 struct wpa_authenticator *wpa_auth = eloop_ctx;
a0ad9e8c 272 struct wpa_group *group, *next;
6fc6879b
JM		 273
274 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
a0ad9e8c
MB		 275 group = wpa_auth->group;
276 while (group) {
277 wpa_group_get(wpa_auth, group);
278
6fc6879b
JM		 279 group->GTKReKey = TRUE;
280 do {
281 group->changed = FALSE;
282 wpa_group_sm_step(wpa_auth, group);
283 } while (group->changed);
a0ad9e8c
MB		 284
285 next = group->next;
286 wpa_group_put(wpa_auth, group);
287 group = next;
6fc6879b
JM		 288 }
289
290 if (wpa_auth->conf.wpa_group_rekey) {
291 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
292 0, wpa_rekey_gtk, wpa_auth, NULL);
293 }
294}
295
296
581a8cde
JM		 297static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
298{
299 struct wpa_authenticator *wpa_auth = eloop_ctx;
300 struct wpa_state_machine *sm = timeout_ctx;
301
302 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
303 wpa_request_new_ptk(sm);
304 wpa_sm_step(sm);
305}
306
307
6fc6879b
JM		 308static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
309{
310 if (sm->pmksa == ctx)
311 sm->pmksa = NULL;
312 return 0;
313}
314
315
316static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
317 void *ctx)
318{
319 struct wpa_authenticator *wpa_auth = ctx;
320 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
321}
322
323
1bdb7ab3
JM		 324static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
325 struct wpa_group *group)
326{
559cdabb 327 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 328 u8 rkey[32];
559cdabb 329 unsigned long ptr;
1bdb7ab3 330
3642c431 331 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 332 return -1;
333 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
334
335 /*
336 * Counter = PRF-256(Random number, "Init Counter",
337 * Local MAC Address || Time)
338 */
339 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
340 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 341 ptr = (unsigned long) group;
342 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
3642c431 343 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 344 return -1;
345
346 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
347 group->Counter, WPA_NONCE_LEN) < 0)
348 return -1;
349 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
350 group->Counter, WPA_NONCE_LEN);
351
352 return 0;
353}
354
355
e6965d4e 356static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 357 int vlan_id, int delay_init)
e6965d4e
JM		 358{
359 struct wpa_group *group;
e6965d4e
JM		 360
361 group = os_zalloc(sizeof(struct wpa_group));
362 if (group == NULL)
363 return NULL;
364
365 group->GTKAuthenticator = TRUE;
366 group->vlan_id = vlan_id;
c3550295 367 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 368
08704cd8
JM		 369 if (random_pool_ready() != 1) {
370 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
371 "for secure operations - update keys later when "
372 "the first station connects");
373 }
374
1bdb7ab3
JM		 375 /*
376 * Set initial GMK/Counter value here. The actual values that will be
377 * used in negotiations will be set once the first station tries to
378 * connect. This allows more time for collecting additional randomness
379 * on embedded devices.
6fc6879b 380 */
1bdb7ab3 381 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 382 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
383 "initialization.");
384 os_free(group);
385 return NULL;
386 }
6fc6879b
JM		 387
388 group->GInit = TRUE;
bdffdc5d
JM		 389 if (delay_init) {
390 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
391 "until Beacon frames have been configured");
392 /* Initialization is completed in wpa_init_keys(). */
393 } else {
394 wpa_group_sm_step(wpa_auth, group);
395 group->GInit = FALSE;
396 wpa_group_sm_step(wpa_auth, group);
397 }
6fc6879b
JM		 398
399 return group;
400}
401
402
403/**
404 * wpa_init - Initialize WPA authenticator
405 * @addr: Authenticator address
406 * @conf: Configuration for WPA authenticator
a17df5fb 407 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 408 * Returns: Pointer to WPA authenticator data or %NULL on failure
409 */
410struct wpa_authenticator * wpa_init(const u8 *addr,
411 struct wpa_auth_config *conf,
412 struct wpa_auth_callbacks *cb)
413{
414 struct wpa_authenticator *wpa_auth;
415
416 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
417 if (wpa_auth == NULL)
418 return NULL;
419 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
420 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
421 os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
422
423 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
424 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
425 os_free(wpa_auth);
426 return NULL;
427 }
428
bdffdc5d 429 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 430 if (wpa_auth->group == NULL) {
431 os_free(wpa_auth->wpa_ie);
432 os_free(wpa_auth);
433 return NULL;
434 }
435
4bb081f1
JM		 436 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
437 wpa_auth);
6fc6879b
JM		 438 if (wpa_auth->pmksa == NULL) {
439 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 440 os_free(wpa_auth->group);
6fc6879b
JM		 441 os_free(wpa_auth->wpa_ie);
442 os_free(wpa_auth);
443 return NULL;
444 }
445
446#ifdef CONFIG_IEEE80211R
447 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
448 if (wpa_auth->ft_pmk_cache == NULL) {
449 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 450 os_free(wpa_auth->group);
6fc6879b 451 os_free(wpa_auth->wpa_ie);
4bb081f1 452 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 453 os_free(wpa_auth);
454 return NULL;
455 }
456#endif /* CONFIG_IEEE80211R */
457
458 if (wpa_auth->conf.wpa_gmk_rekey) {
459 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
460 wpa_rekey_gmk, wpa_auth, NULL);
461 }
462
463 if (wpa_auth->conf.wpa_group_rekey) {
464 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
465 wpa_rekey_gtk, wpa_auth, NULL);
466 }
467
25ef8529
JM		 468#ifdef CONFIG_P2P
469 if (WPA_GET_BE32(conf->ip_addr_start)) {
470 int count = WPA_GET_BE32(conf->ip_addr_end) -
471 WPA_GET_BE32(conf->ip_addr_start) + 1;
472 if (count > 1000)
473 count = 1000;
474 if (count > 0)
475 wpa_auth->ip_pool = bitfield_alloc(count);
476 }
477#endif /* CONFIG_P2P */
478
6fc6879b
JM		 479 return wpa_auth;
480}
481
482
bdffdc5d
JM		 483int wpa_init_keys(struct wpa_authenticator *wpa_auth)
484{
485 struct wpa_group *group = wpa_auth->group;
486
487 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
488 "keys");
489 wpa_group_sm_step(wpa_auth, group);
490 group->GInit = FALSE;
491 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 492 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
493 return -1;
bdffdc5d
JM		 494 return 0;
495}
496
497
6fc6879b
JM		 498/**
499 * wpa_deinit - Deinitialize WPA authenticator
500 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
501 */
502void wpa_deinit(struct wpa_authenticator *wpa_auth)
503{
504 struct wpa_group *group, *prev;
505
506 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
507 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
508
509#ifdef CONFIG_PEERKEY
510 while (wpa_auth->stsl_negotiations)
511 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
512#endif /* CONFIG_PEERKEY */
513
4bb081f1 514 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 515
516#ifdef CONFIG_IEEE80211R
517 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
518 wpa_auth->ft_pmk_cache = NULL;
519#endif /* CONFIG_IEEE80211R */
520
25ef8529
JM		 521#ifdef CONFIG_P2P
522 bitfield_free(wpa_auth->ip_pool);
523#endif /* CONFIG_P2P */
524
525
6fc6879b
JM		 526 os_free(wpa_auth->wpa_ie);
527
528 group = wpa_auth->group;
529 while (group) {
530 prev = group;
531 group = group->next;
532 os_free(prev);
533 }
534
535 os_free(wpa_auth);
536}
537
538
539/**
540 * wpa_reconfig - Update WPA authenticator configuration
541 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
542 * @conf: Configuration for WPA authenticator
543 */
544int wpa_reconfig(struct wpa_authenticator *wpa_auth,
545 struct wpa_auth_config *conf)
546{
e6965d4e 547 struct wpa_group *group;
6fc6879b
JM		 548 if (wpa_auth == NULL)
549 return 0;
550
551 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 552 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
553 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
554 return -1;
555 }
556
e6965d4e
JM		 557 /*
558 * Reinitialize GTK to make sure it is suitable for the new
559 * configuration.
560 */
561 group = wpa_auth->group;
c3550295 562 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 563 group->GInit = TRUE;
564 wpa_group_sm_step(wpa_auth, group);
565 group->GInit = FALSE;
566 wpa_group_sm_step(wpa_auth, group);
567
6fc6879b
JM		 568 return 0;
569}
570
571
572struct wpa_state_machine *
94ddef3e
JM		 573wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
574 const u8 *p2p_dev_addr)
6fc6879b
JM		 575{
576 struct wpa_state_machine *sm;
577
7d7f7be2
JM		 578 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
579 return NULL;
580
6fc6879b
JM		 581 sm = os_zalloc(sizeof(struct wpa_state_machine));
582 if (sm == NULL)
583 return NULL;
584 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 585 if (p2p_dev_addr)
586 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 587
588 sm->wpa_auth = wpa_auth;
589 sm->group = wpa_auth->group;
a0ad9e8c 590 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 591
592 return sm;
593}
594
595
6f9b5d16
JM		 596int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
597 struct wpa_state_machine *sm)
6fc6879b
JM		 598{
599 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 600 return -1;
6fc6879b
JM		 601
602#ifdef CONFIG_IEEE80211R
603 if (sm->ft_completed) {
604 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
605 "FT authentication already completed - do not "
606 "start 4-way handshake");
3d4d2348
JM		 607 /* Go to PTKINITDONE state to allow GTK rekeying */
608 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
6f9b5d16 609 return 0;
6fc6879b
JM		 610 }
611#endif /* CONFIG_IEEE80211R */
612
613 if (sm->started) {
22a299ee 614 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 615 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 616 return wpa_sm_step(sm);
6fc6879b
JM		 617 }
618
619 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
620 "start authentication");
621 sm->started = 1;
622
623 sm->Init = TRUE;
e4a6ea1d 624 if (wpa_sm_step(sm) == 1)
6f9b5d16 625 return 1; /* should not really happen */
6fc6879b
JM		 626 sm->Init = FALSE;
627 sm->AuthenticationRequest = TRUE;
6f9b5d16 628 return wpa_sm_step(sm);
6fc6879b
JM		 629}
630
631
a8d05fca
JM		 632void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
633{
634 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
635 * reassociates back to the same AP while the previous entry for the
636 * STA has not yet been removed. */
637 if (sm == NULL)
638 return;
639
640 sm->wpa_key_mgmt = 0;
641}
642
643
6fc6879b
JM		 644static void wpa_free_sta_sm(struct wpa_state_machine *sm)
645{
25ef8529
JM		 646#ifdef CONFIG_P2P
647 if (WPA_GET_BE32(sm->ip_addr)) {
648 u32 start;
649 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
650 "address %u.%u.%u.%u from " MACSTR,
651 sm->ip_addr[0], sm->ip_addr[1],
652 sm->ip_addr[2], sm->ip_addr[3],
653 MAC2STR(sm->addr));
654 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
655 bitfield_clear(sm->wpa_auth->ip_pool,
656 WPA_GET_BE32(sm->ip_addr) - start);
657 }
658#endif /* CONFIG_P2P */
2ade8ef2
JM		 659 if (sm->GUpdateStationKeys) {
660 sm->group->GKeyDoneStations--;
661 sm->GUpdateStationKeys = FALSE;
662 }
0f857f43
JM		 663#ifdef CONFIG_IEEE80211R
664 os_free(sm->assoc_resp_ftie);
692ec305 665 wpabuf_free(sm->ft_pending_req_ies);
0f857f43 666#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 667 os_free(sm->last_rx_eapol_key);
668 os_free(sm->wpa_ie);
a0ad9e8c 669 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b
JM		 670 os_free(sm);
671}
672
673
674void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
675{
676 if (sm == NULL)
677 return;
678
679 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
680 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
681 "strict rekeying - force GTK rekey since STA "
682 "is leaving");
683 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
684 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
685 NULL);
686 }
687
688 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 689 sm->pending_1_of_4_timeout = 0;
6fc6879b 690 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 691 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 692 if (sm->in_step_loop) {
693 /* Must not free state machine while wpa_sm_step() is running.
694 * Freeing will be completed in the end of wpa_sm_step(). */
695 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
696 "machine deinit for " MACSTR, MAC2STR(sm->addr));
697 sm->pending_deinit = 1;
698 } else
699 wpa_free_sta_sm(sm);
700}
701
702
703static void wpa_request_new_ptk(struct wpa_state_machine *sm)
704{
705 if (sm == NULL)
706 return;
707
708 sm->PTKRequest = TRUE;
709 sm->PTK_valid = 0;
710}
711
712
68921e24 713static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 714 const u8 *replay_counter)
715{
716 int i;
717 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 718 if (!ctr[i].valid)
22a299ee 719 break;
68921e24 720 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 721 WPA_REPLAY_COUNTER_LEN) == 0)
722 return 1;
723 }
724 return 0;
725}
726
727
68921e24
JM		 728static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
729 const u8 *replay_counter)
730{
731 int i;
732 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
733 if (ctr[i].valid &&
734 (replay_counter == NULL ||
735 os_memcmp(replay_counter, ctr[i].counter,
736 WPA_REPLAY_COUNTER_LEN) == 0))
737 ctr[i].valid = FALSE;
738 }
739}
740
741
0f857f43
JM		 742#ifdef CONFIG_IEEE80211R
743static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
744 struct wpa_state_machine *sm,
745 struct wpa_eapol_ie_parse *kde)
746{
747 struct wpa_ie_data ie;
748 struct rsn_mdie *mdie;
749
750 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
751 ie.num_pmkid != 1 || ie.pmkid == NULL) {
752 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
753 "FT 4-way handshake message 2/4");
754 return -1;
755 }
756
757 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
758 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
759 sm->sup_pmk_r1_name, PMKID_LEN);
760
761 if (!kde->mdie || !kde->ftie) {
762 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
763 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
764 return -1;
765 }
766
767 mdie = (struct rsn_mdie *) (kde->mdie + 2);
768 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
769 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
770 MOBILITY_DOMAIN_ID_LEN) != 0) {
771 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
772 return -1;
773 }
774
775 if (sm->assoc_resp_ftie &&
776 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
777 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
778 2 + sm->assoc_resp_ftie[1]) != 0)) {
779 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
780 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
781 kde->ftie, kde->ftie_len);
782 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
783 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
784 return -1;
785 }
786
787 return 0;
788}
789#endif /* CONFIG_IEEE80211R */
790
791
c772d054
JM		 792static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
793 struct wpa_state_machine *sm, int group)
ec027805
JM		 794{
795 /* Supplicant reported a Michael MIC error */
796 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
797 "received EAPOL-Key Error Request "
798 "(STA detected Michael MIC failure (group=%d))",
799 group);
fbc72d32
JM		 800
801 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
802 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
803 "ignore Michael MIC failure report since "
804 "group cipher is not TKIP");
805 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
806 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
807 "ignore Michael MIC failure report since "
808 "pairwise cipher is not TKIP");
809 } else {
c772d054
JM		 810 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
811 return 1; /* STA entry was removed */
fbc72d32
JM		 812 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
813 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
814 }
ec027805
JM		 815
816 /*
817 * Error report is not a request for a new key handshake, but since
818 * Authenticator may do it, let's change the keys now anyway.
819 */
820 wpa_request_new_ptk(sm);
c772d054 821 return 0;
ec027805
JM		 822}
823
824
f23c5b17
JM		 825static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
826 size_t data_len)
827{
828 struct wpa_ptk PTK;
829 int ok = 0;
830 const u8 *pmk = NULL;
207976f0 831 unsigned int pmk_len;
f23c5b17
JM		 832
833 for (;;) {
834 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
835 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
836 sm->p2p_dev_addr, pmk);
837 if (pmk == NULL)
838 break;
207976f0
JM		 839 pmk_len = PMK_LEN;
840 } else {
f23c5b17 841 pmk = sm->PMK;
207976f0
JM		 842 pmk_len = sm->pmk_len;
843 }
f23c5b17 844
207976f0 845 wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK);
f23c5b17
JM		 846
847 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len)
848 == 0) {
849 ok = 1;
850 break;
851 }
852
853 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
854 break;
855 }
856
857 if (!ok) {
858 wpa_printf(MSG_DEBUG,
859 "WPA: Earlier SNonce did not result in matching MIC");
860 return -1;
861 }
862
863 wpa_printf(MSG_DEBUG,
864 "WPA: Earlier SNonce resulted in matching MIC");
865 sm->alt_snonce_valid = 0;
866 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
867 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
868 sm->PTK_valid = TRUE;
869
870 return 0;
871}
872
873
6fc6879b
JM		 874void wpa_receive(struct wpa_authenticator *wpa_auth,
875 struct wpa_state_machine *sm,
876 u8 *data, size_t data_len)
877{
878 struct ieee802_1x_hdr *hdr;
879 struct wpa_eapol_key *key;
5e3b5197 880 struct wpa_eapol_key_192 *key192;
6fc6879b
JM		 881 u16 key_info, key_data_length;
882 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
883 SMK_M1, SMK_M3, SMK_ERROR } msg;
884 char *msgtxt;
885 struct wpa_eapol_ie_parse kde;
26e23750 886 int ft;
5e3b5197
JM		 887 const u8 *eapol_key_ie, *key_data;
888 size_t eapol_key_ie_len, keyhdrlen, mic_len;
6fc6879b
JM		 889
890 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
891 return;
892
5e3b5197
JM		 893 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
894 keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
895
896 if (data_len < sizeof(*hdr) + keyhdrlen)
6fc6879b
JM		 897 return;
898
899 hdr = (struct ieee802_1x_hdr *) data;
900 key = (struct wpa_eapol_key *) (hdr + 1);
5e3b5197 901 key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
6fc6879b 902 key_info = WPA_GET_BE16(key->key_info);
5e3b5197
JM		 903 if (mic_len == 24) {
904 key_data = (const u8 *) (key192 + 1);
905 key_data_length = WPA_GET_BE16(key192->key_data_length);
906 } else {
907 key_data = (const u8 *) (key + 1);
908 key_data_length = WPA_GET_BE16(key->key_data_length);
909 }
0d442aff
JM		 910 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
911 " key_info=0x%x type=%u key_data_length=%u",
912 MAC2STR(sm->addr), key_info, key->type, key_data_length);
5e3b5197 913 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 914 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
915 "key_data overflow (%d > %lu)",
916 key_data_length,
917 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 918 keyhdrlen));
6fc6879b
JM		 919 return;
920 }
921
f8e96eb6 922 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 923 if (key->type == EAPOL_KEY_TYPE_WPA) {
924 /*
925 * Some deployed station implementations seem to send
926 * msg 4/4 with incorrect type value in WPA2 mode.
927 */
928 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
929 "with unexpected WPA type in RSN mode");
930 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 931 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
932 "unexpected type %d in RSN mode",
933 key->type);
934 return;
935 }
936 } else {
937 if (key->type != EAPOL_KEY_TYPE_WPA) {
938 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
939 "unexpected type %d in WPA mode",
940 key->type);
941 return;
942 }
943 }
944
bc8318ac
JM		 945 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
946 WPA_NONCE_LEN);
947 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
948 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
949
6fc6879b
JM		 950 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
951 * are set */
952
953 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
954 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
955 if (key_info & WPA_KEY_INFO_ERROR) {
956 msg = SMK_ERROR;
957 msgtxt = "SMK Error";
958 } else {
959 msg = SMK_M1;
960 msgtxt = "SMK M1";
961 }
962 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
963 msg = SMK_M3;
964 msgtxt = "SMK M3";
965 } else if (key_info & WPA_KEY_INFO_REQUEST) {
966 msg = REQUEST;
967 msgtxt = "Request";
968 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
969 msg = GROUP_2;
970 msgtxt = "2/2 Group";
971 } else if (key_data_length == 0) {
972 msg = PAIRWISE_4;
973 msgtxt = "4/4 Pairwise";
974 } else {
975 msg = PAIRWISE_2;
976 msgtxt = "2/4 Pairwise";
977 }
978
979 /* TODO: key_info type validation for PeerKey */
980 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
981 msg == GROUP_2) {
982 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 983 if (sm->pairwise == WPA_CIPHER_CCMP ||
984 sm->pairwise == WPA_CIPHER_GCMP) {
6fc6879b 985 if (wpa_use_aes_cmac(sm) &&
a14896e8 986 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
929a2ea5 987 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
6fc6879b
JM		 988 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
989 wpa_auth_logger(wpa_auth, sm->addr,
990 LOGGER_WARNING,
991 "advertised support for "
992 "AES-128-CMAC, but did not "
993 "use it");
994 return;
995 }
996
997 if (!wpa_use_aes_cmac(sm) &&
998 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
999 wpa_auth_logger(wpa_auth, sm->addr,
1000 LOGGER_WARNING,
1001 "did not use HMAC-SHA1-AES "
eb7719ff 1002 "with CCMP/GCMP");
6fc6879b
JM		 1003 return;
1004 }
1005 }
929a2ea5
JM		 1006
1007 if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
1008 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1009 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1010 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1011 return;
1012 }
6fc6879b
JM		 1013 }
1014
1015 if (key_info & WPA_KEY_INFO_REQUEST) {
1016 if (sm->req_replay_counter_used &&
1017 os_memcmp(key->replay_counter, sm->req_replay_counter,
1018 WPA_REPLAY_COUNTER_LEN) <= 0) {
1019 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1020 "received EAPOL-Key request with "
1021 "replayed counter");
1022 return;
1023 }
1024 }
1025
1026 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1027 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1028 int i;
68921e24
JM		 1029
1030 if (msg == PAIRWISE_2 &&
1031 wpa_replay_counter_valid(sm->prev_key_replay,
1032 key->replay_counter) &&
1033 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1034 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1035 {
1036 /*
1037 * Some supplicant implementations (e.g., Windows XP
1038 * WZC) update SNonce for each EAPOL-Key 2/4. This
1039 * breaks the workaround on accepting any of the
1040 * pending requests, so allow the SNonce to be updated
1041 * even if we have already sent out EAPOL-Key 3/4.
1042 */
1043 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1044 "Process SNonce update from STA "
1045 "based on retransmitted EAPOL-Key "
1046 "1/4");
1047 sm->update_snonce = 1;
f23c5b17
JM		 1048 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1049 sm->alt_snonce_valid = TRUE;
1050 os_memcpy(sm->alt_replay_counter,
1051 sm->key_replay[0].counter,
1052 WPA_REPLAY_COUNTER_LEN);
1053 goto continue_processing;
1054 }
1055
1056 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1057 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1058 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1059 WPA_REPLAY_COUNTER_LEN) == 0) {
1060 /*
1061 * Supplicant may still be using the old SNonce since
1062 * there was two EAPOL-Key 2/4 messages and they had
1063 * different SNonce values.
1064 */
1065 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1066 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1067 goto continue_processing;
1068 }
1069
1070 if (msg == PAIRWISE_2 &&
1071 wpa_replay_counter_valid(sm->prev_key_replay,
1072 key->replay_counter) &&
1073 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1074 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1075 "ignore retransmitted EAPOL-Key %s - "
1076 "SNonce did not change", msgtxt);
1077 } else {
1078 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1079 "received EAPOL-Key %s with "
1080 "unexpected replay counter", msgtxt);
1081 }
22a299ee
JM		 1082 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1083 if (!sm->key_replay[i].valid)
1084 break;
1085 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1086 sm->key_replay[i].counter,
1087 WPA_REPLAY_COUNTER_LEN);
1088 }
6fc6879b
JM		 1089 wpa_hexdump(MSG_DEBUG, "received replay counter",
1090 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1091 return;
1092 }
1093
68921e24 1094continue_processing:
6fc6879b
JM		 1095 switch (msg) {
1096 case PAIRWISE_2:
1097 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1098 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1099 (!sm->update_snonce ||
1100 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1101 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1102 "received EAPOL-Key msg 2/4 in "
1103 "invalid state (%d) - dropped",
1104 sm->wpa_ptk_state);
1105 return;
1106 }
bbb921da 1107 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1108 if (sm->group->reject_4way_hs_for_entropy) {
1109 /*
1110 * The system did not have enough entropy to generate
1111 * strong random numbers. Reject the first 4-way
1112 * handshake(s) and collect some entropy based on the
1113 * information from it. Once enough entropy is
1114 * available, the next atempt will trigger GMK/Key
1115 * Counter update and the station will be allowed to
1116 * continue.
1117 */
1118 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1119 "collect more entropy for random number "
1120 "generation");
08704cd8 1121 random_mark_pool_ready();
08704cd8
JM		 1122 wpa_sta_disconnect(wpa_auth, sm->addr);
1123 return;
1124 }
5e3b5197 1125 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
1566ec46
JM		 1126 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1127 "received EAPOL-Key msg 2/4 with "
1128 "invalid Key Data contents");
1129 return;
1130 }
1131 if (kde.rsn_ie) {
1132 eapol_key_ie = kde.rsn_ie;
1133 eapol_key_ie_len = kde.rsn_ie_len;
a14896e8
JM		 1134 } else if (kde.osen) {
1135 eapol_key_ie = kde.osen;
1136 eapol_key_ie_len = kde.osen_len;
1566ec46
JM		 1137 } else {
1138 eapol_key_ie = kde.wpa_ie;
1139 eapol_key_ie_len = kde.wpa_ie_len;
1140 }
26e23750
JM		 1141 ft = sm->wpa == WPA_VERSION_WPA2 &&
1142 wpa_key_mgmt_ft(sm->wpa_key_mgmt);
6fc6879b 1143 if (sm->wpa_ie == NULL ||
26e23750
JM		 1144 wpa_compare_rsn_ie(ft,
1145 sm->wpa_ie, sm->wpa_ie_len,
1566ec46 1146 eapol_key_ie, eapol_key_ie_len)) {
6fc6879b
JM		 1147 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1148 "WPA IE from (Re)AssocReq did not "
1149 "match with msg 2/4");
1150 if (sm->wpa_ie) {
1151 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
1152 sm->wpa_ie, sm->wpa_ie_len);
1153 }
1154 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1566ec46 1155 eapol_key_ie, eapol_key_ie_len);
6fc6879b
JM		 1156 /* MLME-DEAUTHENTICATE.request */
1157 wpa_sta_disconnect(wpa_auth, sm->addr);
1158 return;
1159 }
26e23750 1160#ifdef CONFIG_IEEE80211R
0f857f43
JM		 1161 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
1162 wpa_sta_disconnect(wpa_auth, sm->addr);
1163 return;
26e23750
JM		 1164 }
1165#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 1166#ifdef CONFIG_P2P
1167 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
1168 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
1169 int idx;
1170 wpa_printf(MSG_DEBUG, "P2P: IP address requested in "
1171 "EAPOL-Key exchange");
1172 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
1173 if (idx >= 0) {
1174 u32 start = WPA_GET_BE32(wpa_auth->conf.
1175 ip_addr_start);
1176 bitfield_set(wpa_auth->ip_pool, idx);
1177 WPA_PUT_BE32(sm->ip_addr, start + idx);
1178 wpa_printf(MSG_DEBUG, "P2P: Assigned IP "
1179 "address %u.%u.%u.%u to " MACSTR,
1180 sm->ip_addr[0], sm->ip_addr[1],
1181 sm->ip_addr[2], sm->ip_addr[3],
1182 MAC2STR(sm->addr));
1183 }
1184 }
1185#endif /* CONFIG_P2P */
6fc6879b
JM		 1186 break;
1187 case PAIRWISE_4:
1188 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1189 !sm->PTK_valid) {
1190 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1191 "received EAPOL-Key msg 4/4 in "
1192 "invalid state (%d) - dropped",
1193 sm->wpa_ptk_state);
1194 return;
1195 }
1196 break;
1197 case GROUP_2:
1198 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1199 || !sm->PTK_valid) {
1200 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1201 "received EAPOL-Key msg 2/2 in "
1202 "invalid state (%d) - dropped",
1203 sm->wpa_ptk_group_state);
1204 return;
1205 }
1206 break;
1207#ifdef CONFIG_PEERKEY
1208 case SMK_M1:
1209 case SMK_M3:
1210 case SMK_ERROR:
1211 if (!wpa_auth->conf.peerkey) {
1212 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1213 "PeerKey use disabled - ignoring message");
1214 return;
1215 }
1216 if (!sm->PTK_valid) {
1217 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1218 "received EAPOL-Key msg SMK in "
1219 "invalid state - dropped");
1220 return;
1221 }
1222 break;
1223#else /* CONFIG_PEERKEY */
1224 case SMK_M1:
1225 case SMK_M3:
1226 case SMK_ERROR:
1227 return; /* STSL disabled - ignore SMK messages */
1228#endif /* CONFIG_PEERKEY */
1229 case REQUEST:
1230 break;
1231 }
1232
1233 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1234 "received EAPOL-Key frame (%s)", msgtxt);
1235
1236 if (key_info & WPA_KEY_INFO_ACK) {
1237 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1238 "received invalid EAPOL-Key: Key Ack set");
1239 return;
1240 }
1241
1242 if (!(key_info & WPA_KEY_INFO_MIC)) {
1243 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1244 "received invalid EAPOL-Key: Key MIC not set");
1245 return;
1246 }
1247
1248 sm->MICVerified = FALSE;
68921e24 1249 if (sm->PTK_valid && !sm->update_snonce) {
929a2ea5 1250 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data,
f23c5b17
JM		 1251 data_len) &&
1252 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1253 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1254 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1255 "received EAPOL-Key with invalid MIC");
1256 return;
1257 }
1258 sm->MICVerified = TRUE;
1259 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1260 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1261 }
1262
1263 if (key_info & WPA_KEY_INFO_REQUEST) {
1264 if (sm->MICVerified) {
1265 sm->req_replay_counter_used = 1;
1266 os_memcpy(sm->req_replay_counter, key->replay_counter,
1267 WPA_REPLAY_COUNTER_LEN);
1268 } else {
1269 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1270 "received EAPOL-Key request with "
1271 "invalid MIC");
1272 return;
1273 }
1274
1275 /*
1276 * TODO: should decrypt key data field if encryption was used;
1277 * even though MAC address KDE is not normally encrypted,
1278 * supplicant is allowed to encrypt it.
1279 */
1280 if (msg == SMK_ERROR) {
1281#ifdef CONFIG_PEERKEY
5e3b5197 1282 wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
6fc6879b
JM		 1283#endif /* CONFIG_PEERKEY */
1284 return;
1285 } else if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1286 if (wpa_receive_error_report(
1287 wpa_auth, sm,
1288 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1289 return; /* STA entry was removed */
6fc6879b
JM		 1290 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1291 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1292 "received EAPOL-Key Request for new "
1293 "4-Way Handshake");
1294 wpa_request_new_ptk(sm);
1295#ifdef CONFIG_PEERKEY
1296 } else if (msg == SMK_M1) {
5e3b5197 1297 wpa_smk_m1(wpa_auth, sm, key, key_data,
5c6787a6 1298 key_data_length);
6fc6879b
JM		 1299#endif /* CONFIG_PEERKEY */
1300 } else if (key_data_length > 0 &&
5e3b5197
JM		 1301 wpa_parse_kde_ies(key_data, key_data_length,
1302 &kde) == 0 &&
6fc6879b
JM		 1303 kde.mac_addr) {
1304 } else {
1305 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1306 "received EAPOL-Key Request for GTK "
1307 "rekeying");
6fc6879b
JM		 1308 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1309 wpa_rekey_gtk(wpa_auth, NULL);
1310 }
1311 } else {
68921e24
JM		 1312 /* Do not allow the same key replay counter to be reused. */
1313 wpa_replay_counter_mark_invalid(sm->key_replay,
1314 key->replay_counter);
1315
1316 if (msg == PAIRWISE_2) {
1317 /*
1318 * Maintain a copy of the pending EAPOL-Key frames in
1319 * case the EAPOL-Key frame was retransmitted. This is
1320 * needed to allow EAPOL-Key msg 2/4 reply to another
1321 * pending msg 1/4 to update the SNonce to work around
1322 * unexpected supplicant behavior.
1323 */
1324 os_memcpy(sm->prev_key_replay, sm->key_replay,
1325 sizeof(sm->key_replay));
1326 } else {
1327 os_memset(sm->prev_key_replay, 0,
1328 sizeof(sm->prev_key_replay));
1329 }
1330
1331 /*
1332 * Make sure old valid counters are not accepted anymore and
1333 * do not get copied again.
1334 */
1335 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1336 }
1337
1338#ifdef CONFIG_PEERKEY
1339 if (msg == SMK_M3) {
5e3b5197 1340 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
6fc6879b
JM		 1341 return;
1342 }
1343#endif /* CONFIG_PEERKEY */
1344
1345 os_free(sm->last_rx_eapol_key);
1346 sm->last_rx_eapol_key = os_malloc(data_len);
1347 if (sm->last_rx_eapol_key == NULL)
1348 return;
1349 os_memcpy(sm->last_rx_eapol_key, data, data_len);
1350 sm->last_rx_eapol_key_len = data_len;
1351
0d442aff 1352 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1353 sm->EAPOLKeyReceived = TRUE;
1354 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1355 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1356 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1357 wpa_sm_step(sm);
1358}
1359
1360
3c7302c2
JM		 1361static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1362 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1363{
5cb9d5c3
JM		 1364 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1365 u8 *pos;
3c7302c2 1366 int ret = 0;
6fc6879b 1367
5cb9d5c3
JM		 1368 /* GTK = PRF-X(GMK, "Group key expansion",
1369 * AA || GNonce || Time || random data)
1370 * The example described in the IEEE 802.11 standard uses only AA and
1371 * GNonce as inputs here. Add some more entropy since this derivation
1372 * is done only at the Authenticator and as such, does not need to be
1373 * exactly same.
1374 */
6fc6879b
JM		 1375 os_memcpy(data, addr, ETH_ALEN);
1376 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1377 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1378 wpa_get_ntp_timestamp(pos);
1379 pos += 8;
3642c431 1380 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1381 ret = -1;
6fc6879b 1382
56586197 1383#ifdef CONFIG_IEEE80211W
5cb9d5c3 1384 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1385#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1386 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1387 < 0)
1388 ret = -1;
56586197 1389#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1390
1391 return ret;
6fc6879b
JM		 1392}
1393
1394
1395static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1396{
1397 struct wpa_authenticator *wpa_auth = eloop_ctx;
1398 struct wpa_state_machine *sm = timeout_ctx;
1399
e4bf4db9 1400 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1401 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1402 sm->TimeoutEvt = TRUE;
1403 wpa_sm_step(sm);
1404}
1405
1406
1407void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1408 struct wpa_state_machine *sm, int key_info,
1409 const u8 *key_rsc, const u8 *nonce,
1410 const u8 *kde, size_t kde_len,
1411 int keyidx, int encr, int force_version)
1412{
1413 struct ieee802_1x_hdr *hdr;
1414 struct wpa_eapol_key *key;
5e3b5197
JM		 1415 struct wpa_eapol_key_192 *key192;
1416 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1417 int alg;
1418 int key_data_len, pad_len = 0;
1419 u8 *buf, *pos;
1420 int version, pairwise;
22a299ee 1421 int i;
5e3b5197 1422 u8 *key_data;
6fc6879b 1423
5e3b5197
JM		 1424 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
1425 keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
1426
1427 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1428
1429 if (force_version)
1430 version = force_version;
929a2ea5
JM		 1431 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1432 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt))
a14896e8 1433 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
6fc6879b
JM		 1434 else if (wpa_use_aes_cmac(sm))
1435 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1436 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1437 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1438 else
1439 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1440
8543ed8a 1441 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1442
1443 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1444 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1445 "encr=%d)",
1446 version,
1447 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1448 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1449 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1450 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1451 pairwise, (unsigned long) kde_len, keyidx, encr);
1452
1453 key_data_len = kde_len;
1454
1455 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1456 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1457 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1458 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1459 pad_len = key_data_len % 8;
1460 if (pad_len)
1461 pad_len = 8 - pad_len;
1462 key_data_len += pad_len + 8;
1463 }
1464
1465 len += key_data_len;
1466
1467 hdr = os_zalloc(len);
1468 if (hdr == NULL)
1469 return;
1470 hdr->version = wpa_auth->conf.eapol_version;
1471 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1472 hdr->length = host_to_be16(len - sizeof(*hdr));
1473 key = (struct wpa_eapol_key *) (hdr + 1);
5e3b5197
JM		 1474 key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
1475 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1476
1477 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1478 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1479 key_info |= version;
1480 if (encr && sm->wpa == WPA_VERSION_WPA2)
1481 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1482 if (sm->wpa != WPA_VERSION_WPA2)
1483 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1484 WPA_PUT_BE16(key->key_info, key_info);
1485
1486 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
c3550295 1487 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b
JM		 1488 if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1489 WPA_PUT_BE16(key->key_length, 0);
1490
1491 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1492 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1493 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1494 os_memcpy(sm->key_replay[i].counter,
1495 sm->key_replay[i - 1].counter,
1496 WPA_REPLAY_COUNTER_LEN);
1497 }
1498 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1499 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1500 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1501 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1502 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1503 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1504
1505 if (nonce)
1506 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1507
1508 if (key_rsc)
1509 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1510
1511 if (kde && !encr) {
5e3b5197
JM		 1512 os_memcpy(key_data, kde, kde_len);
1513 if (mic_len == 24)
1514 WPA_PUT_BE16(key192->key_data_length, kde_len);
1515 else
1516 WPA_PUT_BE16(key->key_data_length, kde_len);
6fc6879b
JM		 1517 } else if (encr && kde) {
1518 buf = os_zalloc(key_data_len);
1519 if (buf == NULL) {
1520 os_free(hdr);
1521 return;
1522 }
1523 pos = buf;
1524 os_memcpy(pos, kde, kde_len);
1525 pos += kde_len;
1526
1527 if (pad_len)
1528 *pos++ = 0xdd;
1529
1530 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1531 buf, key_data_len);
1532 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1533 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1534 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b 1535 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
98cd3d1c 1536 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1537 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1538 os_free(hdr);
1539 os_free(buf);
1540 return;
1541 }
5e3b5197
JM		 1542 if (mic_len == 24)
1543 WPA_PUT_BE16(key192->key_data_length,
1544 key_data_len);
1545 else
1546 WPA_PUT_BE16(key->key_data_length,
1547 key_data_len);
7cb53ded 1548#ifndef CONFIG_NO_RC4
98cd3d1c 1549 } else if (sm->PTK.kek_len == 16) {
6fc6879b
JM		 1550 u8 ek[32];
1551 os_memcpy(key->key_iv,
1552 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1553 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1554 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1555 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1556 os_memcpy(key_data, buf, key_data_len);
1557 rc4_skip(ek, 32, 256, key_data, key_data_len);
1558 if (mic_len == 24)
1559 WPA_PUT_BE16(key192->key_data_length,
1560 key_data_len);
1561 else
1562 WPA_PUT_BE16(key->key_data_length,
1563 key_data_len);
7cb53ded 1564#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1565 } else {
1566 os_free(hdr);
1567 os_free(buf);
1568 return;
6fc6879b
JM		 1569 }
1570 os_free(buf);
1571 }
1572
1573 if (key_info & WPA_KEY_INFO_MIC) {
5e3b5197
JM		 1574 u8 *key_mic;
1575
6fc6879b
JM		 1576 if (!sm->PTK_valid) {
1577 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1578 "PTK not valid when sending EAPOL-Key "
1579 "frame");
1580 os_free(hdr);
1581 return;
1582 }
5e3b5197
JM		 1583
1584 key_mic = key192->key_mic; /* same offset for key and key192 */
98cd3d1c
JM		 1585 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1586 sm->wpa_key_mgmt, version,
5e3b5197 1587 (u8 *) hdr, len, key_mic);
7af092a0
JB		 1588#ifdef CONFIG_TESTING_OPTIONS
1589 if (!pairwise &&
06df2aa6 1590 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1591 drand48() <
1592 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1593 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1594 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1595 key_mic[0]++;
7af092a0
JB		 1596 }
1597#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1598 }
1599
1600 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1601 1);
1602 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1603 sm->pairwise_set);
1604 os_free(hdr);
1605}
1606
1607
1608static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1609 struct wpa_state_machine *sm, int key_info,
1610 const u8 *key_rsc, const u8 *nonce,
1611 const u8 *kde, size_t kde_len,
1612 int keyidx, int encr)
1613{
1614 int timeout_ms;
1615 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
bae61562 1616 int ctr;
6fc6879b
JM		 1617
1618 if (sm == NULL)
1619 return;
1620
1621 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1622 keyidx, encr, 0);
1623
bae61562 1624 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1625 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1626 timeout_ms = pairwise ? eapol_key_timeout_first :
1627 eapol_key_timeout_first_group;
bae61562
JM		 1628 else
1629 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1630 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1631 sm->pending_1_of_4_timeout = 1;
1632 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1633 "counter %d)", timeout_ms, ctr);
6fc6879b
JM		 1634 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1635 wpa_send_eapol_timeout, wpa_auth, sm);
1636}
1637
1638
929a2ea5
JM		 1639static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
1640 size_t data_len)
6fc6879b
JM		 1641{
1642 struct ieee802_1x_hdr *hdr;
1643 struct wpa_eapol_key *key;
5e3b5197 1644 struct wpa_eapol_key_192 *key192;
6fc6879b
JM		 1645 u16 key_info;
1646 int ret = 0;
98cd3d1c 1647 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
5e3b5197 1648 size_t mic_len = wpa_mic_len(akmp);
6fc6879b
JM		 1649
1650 if (data_len < sizeof(*hdr) + sizeof(*key))
1651 return -1;
1652
1653 hdr = (struct ieee802_1x_hdr *) data;
1654 key = (struct wpa_eapol_key *) (hdr + 1);
5e3b5197 1655 key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
6fc6879b 1656 key_info = WPA_GET_BE16(key->key_info);
5e3b5197
JM		 1657 os_memcpy(mic, key192->key_mic, mic_len);
1658 os_memset(key192->key_mic, 0, mic_len);
98cd3d1c
JM		 1659 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1660 key_info & WPA_KEY_INFO_TYPE_MASK,
5e3b5197
JM		 1661 data, data_len, key192->key_mic) ||
1662 os_memcmp_const(mic, key192->key_mic, mic_len) != 0)
6fc6879b 1663 ret = -1;
5e3b5197 1664 os_memcpy(key192->key_mic, mic, mic_len);
6fc6879b
JM		 1665 return ret;
1666}
1667
1668
1669void wpa_remove_ptk(struct wpa_state_machine *sm)
1670{
1671 sm->PTK_valid = FALSE;
1672 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
26083221 1673 wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
6fc6879b 1674 sm->pairwise_set = FALSE;
581a8cde 1675 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1676}
1677
1678
bb119228 1679int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1680{
5d22a1d5
JM		 1681 int remove_ptk = 1;
1682
6fc6879b 1683 if (sm == NULL)
6f9b5d16 1684 return -1;
6fc6879b
JM		 1685
1686 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1687 "event %d notification", event);
1688
1689 switch (event) {
1690 case WPA_AUTH:
c50d94f1
BC		 1691#ifdef CONFIG_MESH
1692 /* PTKs are derived through AMPE */
1693 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1694 /* not mesh */
1695 break;
1696 }
1697 return 0;
1698#endif /* CONFIG_MESH */
6fc6879b
JM		 1699 case WPA_ASSOC:
1700 break;
1701 case WPA_DEAUTH:
1702 case WPA_DISASSOC:
1703 sm->DeauthenticationRequest = TRUE;
1704 break;
1705 case WPA_REAUTH:
1706 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1707 if (!sm->started) {
1708 /*
1709 * When using WPS, we may end up here if the STA
1710 * manages to re-associate without the previous STA
1711 * entry getting removed. Consequently, we need to make
1712 * sure that the WPA state machines gets initialized
1713 * properly at this point.
1714 */
1715 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1716 "started - initialize now");
1717 sm->started = 1;
1718 sm->Init = TRUE;
1719 if (wpa_sm_step(sm) == 1)
1720 return 1; /* should not really happen */
1721 sm->Init = FALSE;
1722 sm->AuthenticationRequest = TRUE;
1723 break;
1724 }
9663596f
JM		 1725 if (sm->GUpdateStationKeys) {
1726 /*
1727 * Reauthentication cancels the pending group key
1728 * update for this STA.
1729 */
1730 sm->group->GKeyDoneStations--;
1731 sm->GUpdateStationKeys = FALSE;
1732 sm->PtkGroupInit = TRUE;
1733 }
6fc6879b
JM		 1734 sm->ReAuthenticationRequest = TRUE;
1735 break;
1736 case WPA_ASSOC_FT:
1737#ifdef CONFIG_IEEE80211R
81a658d7
JM		 1738 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1739 "after association");
1740 wpa_ft_install_ptk(sm);
1741
6fc6879b
JM		 1742 /* Using FT protocol, not WPA auth state machine */
1743 sm->ft_completed = 1;
6f9b5d16 1744 return 0;
6fc6879b
JM		 1745#else /* CONFIG_IEEE80211R */
1746 break;
1747#endif /* CONFIG_IEEE80211R */
1748 }
1749
1750#ifdef CONFIG_IEEE80211R
1751 sm->ft_completed = 0;
1752#endif /* CONFIG_IEEE80211R */
1753
5d22a1d5
JM		 1754#ifdef CONFIG_IEEE80211W
1755 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1756 remove_ptk = 0;
1757#endif /* CONFIG_IEEE80211W */
6fc6879b 1758
5d22a1d5
JM		 1759 if (remove_ptk) {
1760 sm->PTK_valid = FALSE;
1761 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1762
1763 if (event != WPA_REAUTH_EAPOL)
1764 wpa_remove_ptk(sm);
1765 }
6fc6879b 1766
43f49c37
JM		 1767 if (sm->in_step_loop) {
1768 /*
1769 * wpa_sm_step() is already running - avoid recursive call to
1770 * it by making the existing loop process the new update.
1771 */
1772 sm->changed = TRUE;
1773 return 0;
1774 }
6f9b5d16 1775 return wpa_sm_step(sm);
6fc6879b
JM		 1776}
1777
1778
6fc6879b
JM		 1779SM_STATE(WPA_PTK, INITIALIZE)
1780{
1781 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1782 if (sm->Init) {
1783 /* Init flag is not cleared here, so avoid busy
1784 * loop by claiming nothing changed. */
1785 sm->changed = FALSE;
1786 }
1787
1788 sm->keycount = 0;
1789 if (sm->GUpdateStationKeys)
1790 sm->group->GKeyDoneStations--;
1791 sm->GUpdateStationKeys = FALSE;
1792 if (sm->wpa == WPA_VERSION_WPA)
1793 sm->PInitAKeys = FALSE;
1794 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1795 * Local AA > Remote AA)) */) {
1796 sm->Pair = TRUE;
1797 }
1798 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1799 wpa_remove_ptk(sm);
1800 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1801 sm->TimeoutCtr = 0;
56586197 1802 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1803 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1804 WPA_EAPOL_authorized, 0);
1805 }
1806}
1807
1808
1809SM_STATE(WPA_PTK, DISCONNECT)
1810{
1811 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1812 sm->Disconnect = FALSE;
1813 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1814}
1815
1816
1817SM_STATE(WPA_PTK, DISCONNECTED)
1818{
1819 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1820 sm->DeauthenticationRequest = FALSE;
1821}
1822
1823
1824SM_STATE(WPA_PTK, AUTHENTICATION)
1825{
1826 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1827 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1828 sm->PTK_valid = FALSE;
1829 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1830 1);
1831 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1832 sm->AuthenticationRequest = FALSE;
1833}
1834
1835
40d00d2b
NC		 1836static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1837 struct wpa_group *group)
1bdb7ab3 1838{
40d00d2b
NC		 1839 if (group->first_sta_seen)
1840 return;
1bdb7ab3
JM		 1841 /*
1842 * System has run bit further than at the time hostapd was started
1843 * potentially very early during boot up. This provides better chances
1844 * of collecting more randomness on embedded systems. Re-initialize the
1845 * GMK and Counter here to improve their strength if there was not
1846 * enough entropy available immediately after system startup.
1847 */
1848 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1849 "station");
08704cd8
JM		 1850 if (random_pool_ready() != 1) {
1851 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1852 "to proceed - reject first 4-way handshake");
1853 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1854 } else {
1855 group->first_sta_seen = TRUE;
1856 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1857 }
40d00d2b 1858
aac1efec
JM		 1859 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1860 wpa_gtk_update(wpa_auth, group) < 0 ||
1861 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1862 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1863 group->first_sta_seen = FALSE;
1864 group->reject_4way_hs_for_entropy = TRUE;
1865 }
1bdb7ab3
JM		 1866}
1867
1868
6fc6879b
JM		 1869SM_STATE(WPA_PTK, AUTHENTICATION2)
1870{
1871 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1872
40d00d2b 1873 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1874 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1875
3825a19b
JM		 1876 /*
1877 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1878 * ambiguous. The Authenticator state machine uses a counter that is
1879 * incremented by one for each 4-way handshake. However, the security
1880 * analysis of 4-way handshake points out that unpredictable nonces
1881 * help in preventing precomputation attacks. Instead of the state
1882 * machine definition, use an unpredictable nonce value here to provide
1883 * stronger protection against potential precomputation attacks.
1884 */
1885 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1886 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1887 "ANonce.");
65a32cdb 1888 sm->Disconnect = TRUE;
3825a19b
JM		 1889 return;
1890 }
bc8318ac
JM		 1891 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1892 WPA_NONCE_LEN);
6fc6879b
JM		 1893 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1894 * logical place than INITIALIZE since AUTHENTICATION2 can be
1895 * re-entered on ReAuthenticationRequest without going through
1896 * INITIALIZE. */
1897 sm->TimeoutCtr = 0;
1898}
1899
1900
1901SM_STATE(WPA_PTK, INITPMK)
1902{
1903 u8 msk[2 * PMK_LEN];
1904 size_t len = 2 * PMK_LEN;
1905
1906 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1907#ifdef CONFIG_IEEE80211R
1908 sm->xxkey_len = 0;
1909#endif /* CONFIG_IEEE80211R */
1910 if (sm->pmksa) {
1911 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1912 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1913 sm->pmk_len = sm->pmksa->pmk_len;
6fc6879b 1914 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1915 unsigned int pmk_len;
1916
1917 if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
1918 pmk_len = PMK_LEN_SUITE_B_192;
1919 else
1920 pmk_len = PMK_LEN;
6fc6879b 1921 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1922 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1923 pmk_len);
1924 if (len < pmk_len) {
1925 wpa_printf(MSG_DEBUG,
1926 "WPA: MSK not long enough (%u) to create PMK (%u)",
1927 (unsigned int) len, (unsigned int) pmk_len);
1928 sm->Disconnect = TRUE;
1929 return;
1930 }
1931 os_memcpy(sm->PMK, msk, pmk_len);
1932 sm->pmk_len = pmk_len;
6fc6879b
JM		 1933#ifdef CONFIG_IEEE80211R
1934 if (len >= 2 * PMK_LEN) {
1935 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1936 sm->xxkey_len = PMK_LEN;
1937 }
1938#endif /* CONFIG_IEEE80211R */
1939 } else {
400de9b1
BG		 1940 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
1941 sm->wpa_auth->cb.get_msk);
1180dd66
JM		 1942 sm->Disconnect = TRUE;
1943 return;
6fc6879b 1944 }
40aaa64f 1945 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 1946
1947 sm->req_replay_counter_used = 0;
1948 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1949 * will break reauthentication since EAPOL state machines may not be
1950 * get into AUTHENTICATING state that clears keyRun before WPA state
1951 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1952 * state and takes PMK from the previously used AAA Key. This will
1953 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1954 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1955 * be good workaround for this issue. */
1956 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1957}
1958
1959
1960SM_STATE(WPA_PTK, INITPSK)
1961{
1962 const u8 *psk;
1963 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
759fd76b 1964 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
6fc6879b
JM		 1965 if (psk) {
1966 os_memcpy(sm->PMK, psk, PMK_LEN);
207976f0 1967 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 1968#ifdef CONFIG_IEEE80211R
1969 os_memcpy(sm->xxkey, psk, PMK_LEN);
1970 sm->xxkey_len = PMK_LEN;
1971#endif /* CONFIG_IEEE80211R */
1972 }
1973 sm->req_replay_counter_used = 0;
1974}
1975
1976
1977SM_STATE(WPA_PTK, PTKSTART)
1978{
1979 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1980 size_t pmkid_len = 0;
1981
1982 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1983 sm->PTKRequest = FALSE;
1984 sm->TimeoutEvt = FALSE;
f23c5b17 1985 sm->alt_snonce_valid = FALSE;
bae61562
JM		 1986
1987 sm->TimeoutCtr++;
1988 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1989 /* No point in sending the EAPOL-Key - we will disconnect
1990 * immediately following this. */
1991 return;
1992 }
1993
6fc6879b
JM		 1994 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1995 "sending 1/4 msg of 4-Way Handshake");
1996 /*
1997 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1998 * one possible PSK for this STA.
1999 */
2000 if (sm->wpa == WPA_VERSION_WPA2 &&
a14896e8
JM		 2001 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
2002 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2003 pmkid = buf;
2004 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2005 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2006 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2007 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2008 if (sm->pmksa) {
6fc6879b
JM		 2009 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2010 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2011 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2012 /* No KCK available to derive PMKID */
2013 pmkid = NULL;
2014 } else {
6fc6879b
JM		 2015 /*
2016 * Calculate PMKID since no PMKSA cache entry was
2017 * available with pre-calculated PMKID.
2018 */
207976f0 2019 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197
JM		 2020 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2021 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 2022 }
2023 }
2024 wpa_send_eapol(sm->wpa_auth, sm,
2025 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2026 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2027}
2028
2029
f23c5b17 2030static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2031 const u8 *pmk, unsigned int pmk_len,
2032 struct wpa_ptk *ptk)
6fc6879b
JM		 2033{
2034#ifdef CONFIG_IEEE80211R
56586197 2035 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
98cd3d1c 2036 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
6fc6879b
JM		 2037#endif /* CONFIG_IEEE80211R */
2038
207976f0 2039 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c
JM		 2040 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2041 ptk, sm->wpa_key_mgmt, sm->pairwise);
6fc6879b
JM		 2042}
2043
2044
2045SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2046{
2047 struct wpa_ptk PTK;
2c502460 2048 int ok = 0, psk_found = 0;
6fc6879b 2049 const u8 *pmk = NULL;
207976f0 2050 unsigned int pmk_len;
6fc6879b
JM		 2051
2052 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2053 sm->EAPOLKeyReceived = FALSE;
68921e24 2054 sm->update_snonce = FALSE;
6fc6879b
JM		 2055
2056 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2057 * WPA-PSK: iterate through possible PSKs and select the one matching
2058 * the packet */
2059 for (;;) {
56586197 2060 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
759fd76b
JM		 2061 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2062 sm->p2p_dev_addr, pmk);
6fc6879b
JM		 2063 if (pmk == NULL)
2064 break;
2c502460 2065 psk_found = 1;
207976f0
JM		 2066 pmk_len = PMK_LEN;
2067 } else {
6fc6879b 2068 pmk = sm->PMK;
207976f0
JM		 2069 pmk_len = sm->pmk_len;
2070 }
6fc6879b 2071
207976f0 2072 wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK);
6fc6879b 2073
929a2ea5
JM		 2074 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK,
2075 sm->last_rx_eapol_key,
6fc6879b
JM		 2076 sm->last_rx_eapol_key_len) == 0) {
2077 ok = 1;
2078 break;
2079 }
2080
56586197 2081 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 2082 break;
2083 }
2084
2085 if (!ok) {
2086 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2087 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2088 if (psk_found)
2089 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2090 return;
2091 }
2092
26e23750
JM		 2093#ifdef CONFIG_IEEE80211R
2094 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2095 /*
2096 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2097 * with the value we derived.
2098 */
870834a1
JM		 2099 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2100 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2101 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2102 "PMKR1Name mismatch in FT 4-way "
2103 "handshake");
2104 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2105 "Supplicant",
2106 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2107 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2108 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2109 return;
2110 }
2111 }
2112#endif /* CONFIG_IEEE80211R */
2113
e4bf4db9 2114 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2115 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2116
56586197 2117 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2118 /* PSK may have changed from the previous choice, so update
2119 * state machine data based on whatever PSK was selected here.
2120 */
2121 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2122 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2123 }
2124
2125 sm->MICVerified = TRUE;
2126
2127 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2128 sm->PTK_valid = TRUE;
2129}
2130
2131
2132SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2133{
2134 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2135 sm->TimeoutCtr = 0;
2136}
2137
2138
2139#ifdef CONFIG_IEEE80211W
2140
2141static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2142{
2143 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2144 size_t len;
2145 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2146 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2147 }
2148
2149 return 0;
2150}
2151
2152
2153static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2154{
2155 struct wpa_igtk_kde igtk;
2156 struct wpa_group *gsm = sm->group;
03610ad2 2157 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 2158 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 2159
2160 if (!sm->mgmt_frame_prot)
2161 return pos;
2162
2163 igtk.keyid[0] = gsm->GN_igtk;
2164 igtk.keyid[1] = 0;
7b1080da 2165 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 2166 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 2167 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 2168 else
2169 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 2170 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
83421850
JM		 2171 if (sm->wpa_auth->conf.disable_gtk) {
2172 /*
2173 * Provide unique random IGTK to each STA to prevent use of
2174 * IGTK in the BSS.
2175 */
8dd9f9cd 2176 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 2177 return pos;
2178 }
6fc6879b 2179 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 2180 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2181 NULL, 0);
6fc6879b
JM		 2182
2183 return pos;
2184}
2185
2186#else /* CONFIG_IEEE80211W */
2187
2188static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2189{
2190 return 0;
2191}
2192
2193
2194static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2195{
2196 return pos;
2197}
2198
2199#endif /* CONFIG_IEEE80211W */
2200
2201
2202SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2203{
83421850 2204 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 2205 size_t gtk_len, kde_len;
2206 struct wpa_group *gsm = sm->group;
2207 u8 *wpa_ie;
2208 int wpa_ie_len, secure, keyidx, encr = 0;
2209
2210 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2211 sm->TimeoutEvt = FALSE;
bae61562
JM		 2212
2213 sm->TimeoutCtr++;
2214 if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
2215 /* No point in sending the EAPOL-Key - we will disconnect
2216 * immediately following this. */
2217 return;
2218 }
2219
86dfabb8
JM		 2220 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2221 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2222 */
2223 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2224 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2225 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2226 wpa_ie = sm->wpa_auth->wpa_ie;
2227 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2228 if (sm->wpa == WPA_VERSION_WPA &&
2229 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2230 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 2231 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 2232 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 2233 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2234 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 2235 wpa_ie_len = wpa_ie[1] + 2;
2236 }
2237 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2238 "sending 3/4 msg of 4-Way Handshake");
2239 if (sm->wpa == WPA_VERSION_WPA2) {
2240 /* WPA2 send GTK in the 4-way handshake */
2241 secure = 1;
2242 gtk = gsm->GTK[gsm->GN - 1];
2243 gtk_len = gsm->GTK_len;
83421850
JM		 2244 if (sm->wpa_auth->conf.disable_gtk) {
2245 /*
2246 * Provide unique random GTK to each STA to prevent use
2247 * of GTK in the BSS.
2248 */
2249 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2250 return;
2251 gtk = dummy_gtk;
2252 }
6fc6879b
JM		 2253 keyidx = gsm->GN;
2254 _rsc = rsc;
2255 encr = 1;
2256 } else {
2257 /* WPA does not include GTK in msg 3/4 */
2258 secure = 0;
2259 gtk = NULL;
2260 gtk_len = 0;
2261 keyidx = 0;
2262 _rsc = NULL;
0d442aff
JM		 2263 if (sm->rx_eapol_key_secure) {
2264 /*
2265 * It looks like Windows 7 supplicant tries to use
2266 * Secure bit in msg 2/4 after having reported Michael
2267 * MIC failure and it then rejects the 4-way handshake
2268 * if msg 3/4 does not set Secure bit. Work around this
2269 * by setting the Secure bit here even in the case of
2270 * WPA if the supplicant used it first.
2271 */
2272 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2273 "STA used Secure bit in WPA msg 2/4 - "
2274 "set Secure for 3/4 as workaround");
0d442aff
JM		 2275 secure = 1;
2276 }
6fc6879b
JM		 2277 }
2278
2279 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2280 if (gtk)
2281 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
26e23750 2282#ifdef CONFIG_IEEE80211R
86dfabb8
JM		 2283 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2284 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2285 kde_len += 300; /* FTIE + 2 * TIE */
2286 }
26e23750 2287#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 2288#ifdef CONFIG_P2P
2289 if (WPA_GET_BE32(sm->ip_addr) > 0)
2290 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2291#endif /* CONFIG_P2P */
6fc6879b
JM		 2292 kde = os_malloc(kde_len);
2293 if (kde == NULL)
2294 return;
2295
2296 pos = kde;
2297 os_memcpy(pos, wpa_ie, wpa_ie_len);
2298 pos += wpa_ie_len;
26e23750
JM		 2299#ifdef CONFIG_IEEE80211R
2300 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 2301 int res;
2302 size_t elen;
2303
2304 elen = pos - kde;
2305 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 2306 if (res < 0) {
2307 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2308 "PMKR1Name into RSN IE in EAPOL-Key data");
2309 os_free(kde);
2310 return;
2311 }
59e78c24
JM		 2312 pos -= wpa_ie_len;
2313 pos += elen;
26e23750
JM		 2314 }
2315#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 2316 if (gtk) {
2317 u8 hdr[2];
2318 hdr[0] = keyidx & 0x03;
2319 hdr[1] = 0;
2320 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2321 gtk, gtk_len);
2322 }
2323 pos = ieee80211w_kde_add(sm, pos);
2324
86dfabb8
JM		 2325#ifdef CONFIG_IEEE80211R
2326 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2327 int res;
2328 struct wpa_auth_config *conf;
2329
2330 conf = &sm->wpa_auth->conf;
9257610a
JM		 2331 if (sm->assoc_resp_ftie &&
2332 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
2333 os_memcpy(pos, sm->assoc_resp_ftie,
2334 2 + sm->assoc_resp_ftie[1]);
2335 res = 2 + sm->assoc_resp_ftie[1];
2336 } else {
2337 res = wpa_write_ftie(conf, conf->r0_key_holder,
2338 conf->r0_key_holder_len,
2339 NULL, NULL, pos,
2340 kde + kde_len - pos,
2341 NULL, 0);
2342 }
86dfabb8
JM		 2343 if (res < 0) {
2344 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2345 "into EAPOL-Key Key Data");
2346 os_free(kde);
2347 return;
2348 }
2349 pos += res;
2350
2351 /* TIE[ReassociationDeadline] (TU) */
2352 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2353 *pos++ = 5;
2354 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2355 WPA_PUT_LE32(pos, conf->reassociation_deadline);
2356 pos += 4;
2357
2358 /* TIE[KeyLifetime] (seconds) */
2359 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2360 *pos++ = 5;
2361 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2362 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2363 pos += 4;
2364 }
2365#endif /* CONFIG_IEEE80211R */
25ef8529
JM		 2366#ifdef CONFIG_P2P
2367 if (WPA_GET_BE32(sm->ip_addr) > 0) {
2368 u8 addr[3 * 4];
2369 os_memcpy(addr, sm->ip_addr, 4);
2370 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2371 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2372 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2373 addr, sizeof(addr), NULL, 0);
2374 }
2375#endif /* CONFIG_P2P */
86dfabb8 2376
6fc6879b
JM		 2377 wpa_send_eapol(sm->wpa_auth, sm,
2378 (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
2379 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2380 WPA_KEY_INFO_KEY_TYPE,
2381 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2382 os_free(kde);
6fc6879b
JM		 2383}
2384
2385
2386SM_STATE(WPA_PTK, PTKINITDONE)
2387{
2388 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2389 sm->EAPOLKeyReceived = FALSE;
2390 if (sm->Pair) {
c3550295
JM		 2391 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2392 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 2393 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 2394 sm->PTK.tk, klen)) {
6fc6879b
JM		 2395 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2396 return;
2397 }
2398 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2399 sm->pairwise_set = TRUE;
2400
581a8cde
JM		 2401 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2402 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2403 eloop_register_timeout(sm->wpa_auth->conf.
2404 wpa_ptk_rekey, 0, wpa_rekey_ptk,
2405 sm->wpa_auth, sm);
2406 }
2407
56586197 2408 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2409 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2410 WPA_EAPOL_authorized, 1);
2411 }
2412 }
2413
2414 if (0 /* IBSS == TRUE */) {
2415 sm->keycount++;
2416 if (sm->keycount == 2) {
2417 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2418 WPA_EAPOL_portValid, 1);
2419 }
2420 } else {
2421 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2422 1);
2423 }
2424 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2425 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2426 if (sm->wpa == WPA_VERSION_WPA)
2427 sm->PInitAKeys = TRUE;
2428 else
2429 sm->has_GTK = TRUE;
2430 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2431 "pairwise key handshake completed (%s)",
2432 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2433
2434#ifdef CONFIG_IEEE80211R
2435 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2436#endif /* CONFIG_IEEE80211R */
2437}
2438
2439
2440SM_STEP(WPA_PTK)
2441{
2442 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2443
2444 if (sm->Init)
2445 SM_ENTER(WPA_PTK, INITIALIZE);
2446 else if (sm->Disconnect
1aae01fc
BG		 2447 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2448 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2449 "WPA_PTK: sm->Disconnect");
6fc6879b 2450 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 2451 }
6fc6879b
JM		 2452 else if (sm->DeauthenticationRequest)
2453 SM_ENTER(WPA_PTK, DISCONNECTED);
2454 else if (sm->AuthenticationRequest)
2455 SM_ENTER(WPA_PTK, AUTHENTICATION);
2456 else if (sm->ReAuthenticationRequest)
2457 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2458 else if (sm->PTKRequest)
2459 SM_ENTER(WPA_PTK, PTKSTART);
2460 else switch (sm->wpa_ptk_state) {
2461 case WPA_PTK_INITIALIZE:
2462 break;
2463 case WPA_PTK_DISCONNECT:
2464 SM_ENTER(WPA_PTK, DISCONNECTED);
2465 break;
2466 case WPA_PTK_DISCONNECTED:
2467 SM_ENTER(WPA_PTK, INITIALIZE);
2468 break;
2469 case WPA_PTK_AUTHENTICATION:
2470 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2471 break;
2472 case WPA_PTK_AUTHENTICATION2:
56586197 2473 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 2474 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2475 WPA_EAPOL_keyRun) > 0)
2476 SM_ENTER(WPA_PTK, INITPMK);
56586197 2477 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 2478 /* FIX: && 802.1X::keyRun */)
2479 SM_ENTER(WPA_PTK, INITPSK);
2480 break;
2481 case WPA_PTK_INITPMK:
2482 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2483 WPA_EAPOL_keyAvailable) > 0)
2484 SM_ENTER(WPA_PTK, PTKSTART);
2485 else {
2486 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2487 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2488 "INITPMK - keyAvailable = false");
6fc6879b
JM		 2489 SM_ENTER(WPA_PTK, DISCONNECT);
2490 }
2491 break;
2492 case WPA_PTK_INITPSK:
759fd76b
JM		 2493 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2494 NULL))
6fc6879b
JM		 2495 SM_ENTER(WPA_PTK, PTKSTART);
2496 else {
2497 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2498 "no PSK configured for the STA");
2499 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2500 SM_ENTER(WPA_PTK, DISCONNECT);
2501 }
2502 break;
2503 case WPA_PTK_PTKSTART:
2504 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2505 sm->EAPOLKeyPairwise)
2506 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2507 else if (sm->TimeoutCtr >
2508 (int) dot11RSNAConfigPairwiseUpdateCount) {
2509 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2510 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2511 "PTKSTART: Retry limit %d reached",
2512 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2513 SM_ENTER(WPA_PTK, DISCONNECT);
2514 } else if (sm->TimeoutEvt)
2515 SM_ENTER(WPA_PTK, PTKSTART);
2516 break;
2517 case WPA_PTK_PTKCALCNEGOTIATING:
2518 if (sm->MICVerified)
2519 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2520 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2521 sm->EAPOLKeyPairwise)
2522 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2523 else if (sm->TimeoutEvt)
2524 SM_ENTER(WPA_PTK, PTKSTART);
2525 break;
2526 case WPA_PTK_PTKCALCNEGOTIATING2:
2527 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2528 break;
2529 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 2530 if (sm->update_snonce)
2531 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2532 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2533 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 2534 SM_ENTER(WPA_PTK, PTKINITDONE);
2535 else if (sm->TimeoutCtr >
2536 (int) dot11RSNAConfigPairwiseUpdateCount) {
2537 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2538 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2539 "PTKINITNEGOTIATING: Retry limit %d "
2540 "reached",
2541 dot11RSNAConfigPairwiseUpdateCount);
6fc6879b
JM		 2542 SM_ENTER(WPA_PTK, DISCONNECT);
2543 } else if (sm->TimeoutEvt)
2544 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2545 break;
2546 case WPA_PTK_PTKINITDONE:
2547 break;
2548 }
2549}
2550
2551
2552SM_STATE(WPA_PTK_GROUP, IDLE)
2553{
2554 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2555 if (sm->Init) {
2556 /* Init flag is not cleared here, so avoid busy
2557 * loop by claiming nothing changed. */
2558 sm->changed = FALSE;
2559 }
2560 sm->GTimeoutCtr = 0;
2561}
2562
2563
2564SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2565{
2566 u8 rsc[WPA_KEY_RSC_LEN];
2567 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 2568 const u8 *kde;
2569 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 2570 size_t kde_len;
83421850 2571 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 2572
2573 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 2574
2575 sm->GTimeoutCtr++;
2576 if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2577 /* No point in sending the EAPOL-Key - we will disconnect
2578 * immediately following this. */
2579 return;
2580 }
2581
6fc6879b
JM		 2582 if (sm->wpa == WPA_VERSION_WPA)
2583 sm->PInitAKeys = FALSE;
2584 sm->TimeoutEvt = FALSE;
2585 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2586 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2587 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2588 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2589 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2590 "sending 1/2 msg of Group Key Handshake");
2591
83421850
JM		 2592 gtk = gsm->GTK[gsm->GN - 1];
2593 if (sm->wpa_auth->conf.disable_gtk) {
2594 /*
2595 * Provide unique random GTK to each STA to prevent use
2596 * of GTK in the BSS.
2597 */
2598 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
2599 return;
2600 gtk = dummy_gtk;
2601 }
6fc6879b
JM		 2602 if (sm->wpa == WPA_VERSION_WPA2) {
2603 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2604 ieee80211w_kde_len(sm);
e41e4f9e
JM		 2605 kde_buf = os_malloc(kde_len);
2606 if (kde_buf == NULL)
6fc6879b
JM		 2607 return;
2608
e41e4f9e 2609 kde = pos = kde_buf;
6fc6879b
JM		 2610 hdr[0] = gsm->GN & 0x03;
2611 hdr[1] = 0;
2612 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 2613 gtk, gsm->GTK_len);
6fc6879b 2614 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 2615 kde_len = pos - kde;
6fc6879b 2616 } else {
83421850 2617 kde = gtk;
e41e4f9e 2618 kde_len = gsm->GTK_len;
6fc6879b
JM		 2619 }
2620
2621 wpa_send_eapol(sm->wpa_auth, sm,
2622 WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2623 WPA_KEY_INFO_ACK |
2624 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
e41e4f9e
JM		 2625 rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1);
2626
2627 os_free(kde_buf);
6fc6879b
JM		 2628}
2629
2630
2631SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2632{
2633 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2634 sm->EAPOLKeyReceived = FALSE;
2635 if (sm->GUpdateStationKeys)
2636 sm->group->GKeyDoneStations--;
2637 sm->GUpdateStationKeys = FALSE;
2638 sm->GTimeoutCtr = 0;
2639 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2640 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2641 "group key handshake completed (%s)",
2642 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2643 sm->has_GTK = TRUE;
2644}
2645
2646
2647SM_STATE(WPA_PTK_GROUP, KEYERROR)
2648{
2649 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2650 if (sm->GUpdateStationKeys)
2651 sm->group->GKeyDoneStations--;
2652 sm->GUpdateStationKeys = FALSE;
2653 sm->Disconnect = TRUE;
2654}
2655
2656
2657SM_STEP(WPA_PTK_GROUP)
2658{
9663596f 2659 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 2660 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 2661 sm->PtkGroupInit = FALSE;
2662 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 2663 case WPA_PTK_GROUP_IDLE:
2664 if (sm->GUpdateStationKeys ||
2665 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2666 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2667 break;
2668 case WPA_PTK_GROUP_REKEYNEGOTIATING:
2669 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2670 !sm->EAPOLKeyPairwise && sm->MICVerified)
2671 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2672 else if (sm->GTimeoutCtr >
2673 (int) dot11RSNAConfigGroupUpdateCount)
2674 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2675 else if (sm->TimeoutEvt)
2676 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2677 break;
2678 case WPA_PTK_GROUP_KEYERROR:
2679 SM_ENTER(WPA_PTK_GROUP, IDLE);
2680 break;
2681 case WPA_PTK_GROUP_REKEYESTABLISHED:
2682 SM_ENTER(WPA_PTK_GROUP, IDLE);
2683 break;
2684 }
2685}
2686
2687
2688static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2689 struct wpa_group *group)
2690{
2691 int ret = 0;
2692
6fc6879b
JM		 2693 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2694 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2695 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2696 wpa_auth->addr, group->GNonce,
2697 group->GTK[group->GN - 1], group->GTK_len) < 0)
2698 ret = -1;
5cb9d5c3
JM		 2699 wpa_hexdump_key(MSG_DEBUG, "GTK",
2700 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 2701
2702#ifdef CONFIG_IEEE80211W
70f8cc8e 2703 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 2704 size_t len;
2705 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 2706 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2707 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 2708 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2709 wpa_auth->addr, group->GNonce,
8dd9f9cd 2710 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 2711 ret = -1;
6fc6879b 2712 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 2713 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 2714 }
2715#endif /* CONFIG_IEEE80211W */
2716
2717 return ret;
2718}
2719
2720
2721static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2722 struct wpa_group *group)
2723{
2724 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2725 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2726 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2727 group->wpa_group_state = WPA_GROUP_GTK_INIT;
2728
2729 /* GTK[0..N] = 0 */
2730 os_memset(group->GTK, 0, sizeof(group->GTK));
2731 group->GN = 1;
2732 group->GM = 2;
2733#ifdef CONFIG_IEEE80211W
2734 group->GN_igtk = 4;
2735 group->GM_igtk = 5;
2736#endif /* CONFIG_IEEE80211W */
2737 /* GTK[GN] = CalcGTK() */
2738 wpa_gtk_update(wpa_auth, group);
2739}
2740
2741
2742static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2743{
473b6f22
MB		 2744 if (ctx != NULL && ctx != sm->group)
2745 return 0;
2746
6fc6879b
JM		 2747 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2748 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2749 "Not in PTKINITDONE; skip Group Key update");
3c183894 2750 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 2751 return 0;
2752 }
9663596f
JM		 2753 if (sm->GUpdateStationKeys) {
2754 /*
3c183894
JM		 2755 * This should not really happen, so add a debug log entry.
2756 * Since we clear the GKeyDoneStations before the loop, the
2757 * station needs to be counted here anyway.
9663596f
JM		 2758 */
2759 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 2760 "GUpdateStationKeys was already set when "
2761 "marking station for GTK rekeying");
9663596f 2762 }
3c183894 2763
ad3872a3 2764 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 2765 if (sm->is_wnmsleep)
2766 return 0;
d32d94db 2767
3c183894
JM		 2768 sm->group->GKeyDoneStations++;
2769 sm->GUpdateStationKeys = TRUE;
2770
6fc6879b
JM		 2771 wpa_sm_step(sm);
2772 return 0;
2773}
2774
2775
ad3872a3
JM		 2776#ifdef CONFIG_WNM
2777/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 2778void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
2779{
629edfef 2780 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 2781 return;
2782
2783 wpa_group_update_sta(sm, NULL);
2784}
2785
2786
2787void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
2788{
629edfef
JM		 2789 if (sm)
2790 sm->is_wnmsleep = !!flag;
d32d94db
XC		 2791}
2792
2793
2794int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2795{
d32d94db 2796 struct wpa_group *gsm = sm->group;
835822d4 2797 u8 *start = pos;
d32d94db
XC		 2798
2799 /*
835822d4 2800 * GTK subelement:
d32d94db 2801 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 2802 * Key[5..32]
d32d94db 2803 */
835822d4
JM		 2804 *pos++ = WNM_SLEEP_SUBELEM_GTK;
2805 *pos++ = 11 + gsm->GTK_len;
d32d94db 2806 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 2807 WPA_PUT_LE16(pos, gsm->GN & 0x03);
2808 pos += 2;
2809 *pos++ = gsm->GTK_len;
2810 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 2811 return 0;
835822d4
JM		 2812 pos += 8;
2813 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2814 pos += gsm->GTK_len;
d32d94db 2815
835822d4
JM		 2816 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
2817 gsm->GN);
2818 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 2819 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 2820
835822d4 2821 return pos - start;
d32d94db
XC		 2822}
2823
2824
2825#ifdef CONFIG_IEEE80211W
2826int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2827{
d32d94db 2828 struct wpa_group *gsm = sm->group;
835822d4 2829 u8 *start = pos;
8dd9f9cd 2830 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 2831
835822d4
JM		 2832 /*
2833 * IGTK subelement:
2834 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
2835 */
2836 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 2837 *pos++ = 2 + 6 + len;
835822d4
JM		 2838 WPA_PUT_LE16(pos, gsm->GN_igtk);
2839 pos += 2;
2840 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 2841 return 0;
835822d4 2842 pos += 6;
d32d94db 2843
8dd9f9cd
JM		 2844 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
2845 pos += len;
d32d94db 2846
835822d4
JM		 2847 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
2848 gsm->GN_igtk);
2849 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 2850 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 2851
835822d4 2852 return pos - start;
d32d94db
XC		 2853}
2854#endif /* CONFIG_IEEE80211W */
ad3872a3 2855#endif /* CONFIG_WNM */
d32d94db
XC		 2856
2857
6fc6879b
JM		 2858static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2859 struct wpa_group *group)
2860{
2861 int tmp;
2862
2863 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2864 "SETKEYS (VLAN-ID %d)", group->vlan_id);
2865 group->changed = TRUE;
2866 group->wpa_group_state = WPA_GROUP_SETKEYS;
2867 group->GTKReKey = FALSE;
2868 tmp = group->GM;
2869 group->GM = group->GN;
2870 group->GN = tmp;
2871#ifdef CONFIG_IEEE80211W
2872 tmp = group->GM_igtk;
2873 group->GM_igtk = group->GN_igtk;
2874 group->GN_igtk = tmp;
2875#endif /* CONFIG_IEEE80211W */
2876 /* "GKeyDoneStations = GNoStations" is done in more robust way by
2877 * counting the STAs that are marked with GUpdateStationKeys instead of
2878 * including all STAs that could be in not-yet-completed state. */
2879 wpa_gtk_update(wpa_auth, group);
2880
3c183894
JM		 2881 if (group->GKeyDoneStations) {
2882 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2883 "GKeyDoneStations=%d when starting new GTK rekey",
2884 group->GKeyDoneStations);
2885 group->GKeyDoneStations = 0;
2886 }
473b6f22 2887 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 2888 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2889 group->GKeyDoneStations);
2890}
2891
2892
1bdb7ab3
JM		 2893static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2894 struct wpa_group *group)
6fc6879b 2895{
3c7302c2
JM		 2896 int ret = 0;
2897
3c7302c2 2898 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 2899 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 2900 broadcast_ether_addr, group->GN,
2901 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 2902 ret = -1;
6fc6879b
JM		 2903
2904#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 2905 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2906 enum wpa_alg alg;
2907 size_t len;
2908
2909 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
2910 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2911
2912 if (ret == 0 &&
2913 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
2914 broadcast_ether_addr, group->GN_igtk,
2915 group->IGTK[group->GN_igtk - 4], len) < 0)
2916 ret = -1;
2917 }
6fc6879b 2918#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 2919
2920 return ret;
6fc6879b
JM		 2921}
2922
2923
7d7f7be2
JM		 2924static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
2925{
2926 if (sm->group == ctx) {
2927 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
2928 " for discconnection due to fatal failure",
2929 MAC2STR(sm->addr));
2930 sm->Disconnect = TRUE;
2931 }
2932
2933 return 0;
2934}
2935
2936
2937static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
2938 struct wpa_group *group)
2939{
2940 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
2941 group->changed = TRUE;
2942 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
2943 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
2944}
2945
2946
1bdb7ab3
JM		 2947static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2948 struct wpa_group *group)
2949{
2950 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2951 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2952 group->changed = TRUE;
2953 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2954
7d7f7be2
JM		 2955 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
2956 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 2957 return -1;
7d7f7be2 2958 }
1bdb7ab3
JM		 2959
2960 return 0;
2961}
2962
2963
6fc6879b
JM		 2964static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2965 struct wpa_group *group)
2966{
2967 if (group->GInit) {
2968 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 2969 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
2970 /* Do not allow group operations */
6fc6879b
JM		 2971 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2972 group->GTKAuthenticator) {
2973 wpa_group_setkeysdone(wpa_auth, group);
2974 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2975 group->GTKReKey) {
2976 wpa_group_setkeys(wpa_auth, group);
2977 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2978 if (group->GKeyDoneStations == 0)
2979 wpa_group_setkeysdone(wpa_auth, group);
2980 else if (group->GTKReKey)
2981 wpa_group_setkeys(wpa_auth, group);
2982 }
2983}
2984
2985
e4a6ea1d 2986static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 2987{
2988 if (sm == NULL)
e4a6ea1d 2989 return 0;
6fc6879b
JM		 2990
2991 if (sm->in_step_loop) {
2992 /* This should not happen, but if it does, make sure we do not
2993 * end up freeing the state machine too early by exiting the
2994 * recursive call. */
2995 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 2996 return 0;
6fc6879b
JM		 2997 }
2998
2999 sm->in_step_loop = 1;
3000 do {
3001 if (sm->pending_deinit)
3002 break;
3003
3004 sm->changed = FALSE;
3005 sm->wpa_auth->group->changed = FALSE;
3006
3007 SM_STEP_RUN(WPA_PTK);
3008 if (sm->pending_deinit)
3009 break;
3010 SM_STEP_RUN(WPA_PTK_GROUP);
3011 if (sm->pending_deinit)
3012 break;
3013 wpa_group_sm_step(sm->wpa_auth, sm->group);
3014 } while (sm->changed || sm->wpa_auth->group->changed);
3015 sm->in_step_loop = 0;
3016
3017 if (sm->pending_deinit) {
3018 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3019 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3020 wpa_free_sta_sm(sm);
e4a6ea1d 3021 return 1;
6fc6879b 3022 }
e4a6ea1d 3023 return 0;
6fc6879b
JM		 3024}
3025
3026
3027static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3028{
3029 struct wpa_state_machine *sm = eloop_ctx;
3030 wpa_sm_step(sm);
3031}
3032
3033
3034void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3035{
3036 if (sm == NULL)
3037 return;
3038 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3039}
3040
3041
3042void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3043{
3044 int tmp, i;
3045 struct wpa_group *group;
3046
3047 if (wpa_auth == NULL)
3048 return;
3049
3050 group = wpa_auth->group;
3051
3052 for (i = 0; i < 2; i++) {
3053 tmp = group->GM;
3054 group->GM = group->GN;
3055 group->GN = tmp;
3056#ifdef CONFIG_IEEE80211W
3057 tmp = group->GM_igtk;
3058 group->GM_igtk = group->GN_igtk;
3059 group->GN_igtk = tmp;
3060#endif /* CONFIG_IEEE80211W */
3061 wpa_gtk_update(wpa_auth, group);
9354e594 3062 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 3063 }
3064}
3065
3066
a6da824b 3067static const char * wpa_bool_txt(int val)
6fc6879b 3068{
a6da824b 3069 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 3070}
3071
3072
6fc6879b
JM		 3073#define RSN_SUITE "%02x-%02x-%02x-%d"
3074#define RSN_SUITE_ARG(s) \
3075((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3076
3077int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3078{
3079 int len = 0, ret;
3080 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 3081#ifdef CONFIG_RSN_PREAUTH
3082 const int preauth = 1;
3083#else /* CONFIG_RSN_PREAUTH */
3084 const int preauth = 0;
3085#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 3086
3087 if (wpa_auth == NULL)
3088 return len;
3089
3090 ret = os_snprintf(buf + len, buflen - len,
3091 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 3092 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 3093 "dot11RSNAEnabled=%s\n"
3094 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 3095 wpa_bool_txt(preauth),
6fc6879b
JM		 3096 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3097 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 3098 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3099 return len;
3100 len += ret;
3101
3102 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3103 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3104
3105 ret = os_snprintf(
3106 buf + len, buflen - len,
3107 "dot11RSNAConfigVersion=%u\n"
3108 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3109 /* FIX: dot11RSNAConfigGroupCipher */
3110 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3111 /* FIX: dot11RSNAConfigGroupRekeyTime */
3112 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3113 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3114 "dot11RSNAConfigGroupUpdateCount=%u\n"
3115 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3116 "dot11RSNAConfigGroupCipherSize=%u\n"
3117 "dot11RSNAConfigPMKLifetime=%u\n"
3118 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3119 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3120 "dot11RSNAConfigSATimeout=%u\n"
3121 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3122 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3123 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3124 "dot11RSNAPMKIDUsed=%s\n"
3125 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3126 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3127 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3128 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3129 "dot11RSNA4WayHandshakeFailures=%u\n"
3130 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3131 RSN_VERSION,
3132 !!wpa_auth->conf.wpa_strict_rekey,
3133 dot11RSNAConfigGroupUpdateCount,
3134 dot11RSNAConfigPairwiseUpdateCount,
c3550295 3135 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 3136 dot11RSNAConfigPMKLifetime,
3137 dot11RSNAConfigPMKReauthThreshold,
3138 dot11RSNAConfigSATimeout,
3139 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3140 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3141 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3142 pmkid_txt,
3143 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3144 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3145 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3146 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3147 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 3148 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3149 return len;
3150 len += ret;
3151
3152 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3153 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3154
3155 /* Private MIB */
3156 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3157 wpa_auth->group->wpa_group_state);
d85e1fc8 3158 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3159 return len;
3160 len += ret;
3161
3162 return len;
3163}
3164
3165
3166int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3167{
3168 int len = 0, ret;
3169 u32 pairwise = 0;
3170
3171 if (sm == NULL)
3172 return 0;
3173
3174 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3175
3176 /* dot11RSNAStatsEntry */
3177
c3550295
JM		 3178 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3179 WPA_PROTO_RSN : WPA_PROTO_WPA,
3180 sm->pairwise);
3181 if (pairwise == 0)
6fc6879b
JM		 3182 return 0;
3183
3184 ret = os_snprintf(
3185 buf + len, buflen - len,
3186 /* TODO: dot11RSNAStatsIndex */
3187 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3188 "dot11RSNAStatsVersion=1\n"
3189 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3190 /* TODO: dot11RSNAStatsTKIPICVErrors */
3191 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 3192 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 3193 /* TODO: dot11RSNAStatsCCMPReplays */
3194 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3195 /* TODO: dot11RSNAStatsTKIPReplays */,
3196 MAC2STR(sm->addr),
3197 RSN_SUITE_ARG(pairwise),
3198 sm->dot11RSNAStatsTKIPLocalMICFailures,
3199 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 3200 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3201 return len;
3202 len += ret;
3203
3204 /* Private MIB */
3205 ret = os_snprintf(buf + len, buflen - len,
3206 "hostapdWPAPTKState=%d\n"
3207 "hostapdWPAPTKGroupState=%d\n",
3208 sm->wpa_ptk_state,
3209 sm->wpa_ptk_group_state);
d85e1fc8 3210 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3211 return len;
3212 len += ret;
3213
3214 return len;
3215}
3216
3217
3218void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3219{
3220 if (wpa_auth)
3221 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3222}
3223
3224
3225int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3226{
3227 return sm && sm->pairwise_set;
3228}
3229
3230
ff36ff00
JM		 3231int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3232{
3233 return sm->pairwise;
3234}
3235
3236
6fc6879b
JM		 3237int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3238{
3239 if (sm == NULL)
3240 return -1;
3241 return sm->wpa_key_mgmt;
3242}
3243
3244
3245int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3246{
3247 if (sm == NULL)
3248 return 0;
3249 return sm->wpa;
3250}
3251
3252
3253int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3254 struct rsn_pmksa_cache_entry *entry)
3255{
3256 if (sm == NULL || sm->pmksa != entry)
3257 return -1;
3258 sm->pmksa = NULL;
3259 return 0;
3260}
3261
3262
3263struct rsn_pmksa_cache_entry *
3264wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3265{
3266 return sm ? sm->pmksa : NULL;
3267}
3268
3269
3270void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3271{
3272 if (sm)
3273 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3274}
3275
3276
3277const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3278{
3279 if (wpa_auth == NULL)
3280 return NULL;
3281 *len = wpa_auth->wpa_ie_len;
3282 return wpa_auth->wpa_ie;
3283}
3284
3285
3286int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 3287 unsigned int pmk_len,
6fc6879b
JM		 3288 int session_timeout, struct eapol_state_machine *eapol)
3289{
cb465555
JM		 3290 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3291 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 3292 return -1;
3293
207976f0
JM		 3294 if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) {
3295 if (pmk_len > PMK_LEN_SUITE_B_192)
3296 pmk_len = PMK_LEN_SUITE_B_192;
3297 } else if (pmk_len > PMK_LEN) {
3298 pmk_len = PMK_LEN;
3299 }
3300
70c93963 3301 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 3302 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 3303 sm->wpa_auth->addr, sm->addr, session_timeout,
3304 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 3305 return 0;
3306
3307 return -1;
3308}
3309
3310
3311int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3312 const u8 *pmk, size_t len, const u8 *sta_addr,
3313 int session_timeout,
3314 struct eapol_state_machine *eapol)
3315{
3316 if (wpa_auth == NULL)
3317 return -1;
3318
70c93963 3319 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 3320 NULL, 0,
3321 wpa_auth->addr,
4bb081f1
JM		 3322 sta_addr, session_timeout, eapol,
3323 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 3324 return 0;
3325
3326 return -1;
3327}
3328
3329
f2991170 3330int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 3331 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 3332{
3333 if (wpa_auth->conf.disable_pmksa_caching)
3334 return -1;
3335
70c93963 3336 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 3337 NULL, 0,
f2991170
JM		 3338 wpa_auth->addr, addr, 0, NULL,
3339 WPA_KEY_MGMT_SAE))
3340 return 0;
3341
3342 return -1;
3343}
3344
3345
901d1fe1
JM		 3346void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3347 const u8 *sta_addr)
3348{
3349 struct rsn_pmksa_cache_entry *pmksa;
3350
3351 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3352 return;
3353 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3354 if (pmksa) {
3355 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3356 MACSTR " based on request", MAC2STR(sta_addr));
3357 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3358 }
3359}
3360
3361
b8daac18
MH		 3362int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
3363 size_t len)
3364{
3365 if (!wpa_auth || !wpa_auth->pmksa)
3366 return 0;
3367 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
3368}
3369
3370
a0ad9e8c
MB		 3371/*
3372 * Remove and free the group from wpa_authenticator. This is triggered by a
3373 * callback to make sure nobody is currently iterating the group list while it
3374 * gets modified.
3375 */
3376static void wpa_group_free(struct wpa_authenticator *wpa_auth,
3377 struct wpa_group *group)
3378{
3379 struct wpa_group *prev = wpa_auth->group;
3380
3381 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
3382 group->vlan_id);
3383
3384 while (prev) {
3385 if (prev->next == group) {
3386 /* This never frees the special first group as needed */
3387 prev->next = group->next;
3388 os_free(group);
3389 break;
3390 }
3391 prev = prev->next;
3392 }
3393
3394}
3395
3396
3397/* Increase the reference counter for group */
3398static void wpa_group_get(struct wpa_authenticator *wpa_auth,
3399 struct wpa_group *group)
3400{
3401 /* Skip the special first group */
3402 if (wpa_auth->group == group)
3403 return;
3404
3405 group->references++;
3406}
3407
3408
3409/* Decrease the reference counter and maybe free the group */
3410static void wpa_group_put(struct wpa_authenticator *wpa_auth,
3411 struct wpa_group *group)
3412{
3413 /* Skip the special first group */
3414 if (wpa_auth->group == group)
3415 return;
3416
3417 group->references--;
3418 if (group->references)
3419 return;
3420 wpa_group_free(wpa_auth, group);
3421}
3422
3423
3424/*
3425 * Add a group that has its references counter set to zero. Caller needs to
3426 * call wpa_group_get() on the return value to mark the entry in use.
3427 */
6fc6879b
JM		 3428static struct wpa_group *
3429wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3430{
3431 struct wpa_group *group;
3432
3433 if (wpa_auth == NULL || wpa_auth->group == NULL)
3434 return NULL;
3435
3436 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
3437 vlan_id);
bdffdc5d 3438 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 3439 if (group == NULL)
3440 return NULL;
3441
3442 group->next = wpa_auth->group->next;
3443 wpa_auth->group->next = group;
3444
3445 return group;
3446}
3447
3448
7cebc8e2
MB		 3449/*
3450 * Enforce that the group state machine for the VLAN is running, increase
3451 * reference counter as interface is up. References might have been increased
3452 * even if a negative value is returned.
3453 * Returns: -1 on error (group missing, group already failed); otherwise, 0
3454 */
3455int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3456{
3457 struct wpa_group *group;
3458
3459 if (wpa_auth == NULL)
3460 return 0;
3461
3462 group = wpa_auth->group;
3463 while (group) {
3464 if (group->vlan_id == vlan_id)
3465 break;
3466 group = group->next;
3467 }
3468
3469 if (group == NULL) {
3470 group = wpa_auth_add_group(wpa_auth, vlan_id);
3471 if (group == NULL)
3472 return -1;
3473 }
3474
3475 wpa_printf(MSG_DEBUG,
3476 "WPA: Ensure group state machine running for VLAN ID %d",
3477 vlan_id);
3478
3479 wpa_group_get(wpa_auth, group);
3480 group->num_setup_iface++;
3481
3482 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3483 return -1;
3484
3485 return 0;
3486}
3487
3488
3489/*
3490 * Decrease reference counter, expected to be zero afterwards.
3491 * returns: -1 on error (group not found, group in fail state)
3492 * -2 if wpa_group is still referenced
3493 * 0 else
3494 */
3495int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3496{
3497 struct wpa_group *group;
3498 int ret = 0;
3499
3500 if (wpa_auth == NULL)
3501 return 0;
3502
3503 group = wpa_auth->group;
3504 while (group) {
3505 if (group->vlan_id == vlan_id)
3506 break;
3507 group = group->next;
3508 }
3509
3510 if (group == NULL)
3511 return -1;
3512
3513 wpa_printf(MSG_DEBUG,
3514 "WPA: Try stopping group state machine for VLAN ID %d",
3515 vlan_id);
3516
3517 if (group->num_setup_iface <= 0) {
3518 wpa_printf(MSG_ERROR,
3519 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
3520 vlan_id);
3521 return -1;
3522 }
3523 group->num_setup_iface--;
3524
3525 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3526 ret = -1;
3527
3528 if (group->references > 1) {
3529 wpa_printf(MSG_DEBUG,
3530 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
3531 vlan_id);
3532 ret = -2;
3533 }
3534
3535 wpa_group_put(wpa_auth, group);
3536
3537 return ret;
3538}
3539
3540
6fc6879b
JM		 3541int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
3542{
3543 struct wpa_group *group;
3544
3545 if (sm == NULL || sm->wpa_auth == NULL)
3546 return 0;
3547
3548 group = sm->wpa_auth->group;
3549 while (group) {
3550 if (group->vlan_id == vlan_id)
3551 break;
3552 group = group->next;
3553 }
3554
3555 if (group == NULL) {
3556 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
3557 if (group == NULL)
3558 return -1;
3559 }
3560
3561 if (sm->group == group)
3562 return 0;
3563
7d7f7be2
JM		 3564 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3565 return -1;
3566
6fc6879b
JM		 3567 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
3568 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
3569
a0ad9e8c
MB		 3570 wpa_group_get(sm->wpa_auth, group);
3571 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 3572 sm->group = group;
a0ad9e8c 3573
6fc6879b
JM		 3574 return 0;
3575}
e4bf4db9
JM		 3576
3577
3578void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
3579 struct wpa_state_machine *sm, int ack)
3580{
3581 if (wpa_auth == NULL || sm == NULL)
3582 return;
3583 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
3584 " ack=%d", MAC2STR(sm->addr), ack);
3585 if (sm->pending_1_of_4_timeout && ack) {
3586 /*
3587 * Some deployed supplicant implementations update their SNonce
3588 * for each EAPOL-Key 2/4 message even within the same 4-way
3589 * handshake and then fail to use the first SNonce when
3590 * deriving the PTK. This results in unsuccessful 4-way
3591 * handshake whenever the relatively short initial timeout is
3592 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
3593 * around this by increasing the timeout now that we know that
3594 * the station has received the frame.
3595 */
3596 int timeout_ms = eapol_key_timeout_subseq;
3597 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
3598 "timeout by %u ms because of acknowledged frame",
3599 timeout_ms);
3600 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
3601 eloop_register_timeout(timeout_ms / 1000,
3602 (timeout_ms % 1000) * 1000,
3603 wpa_send_eapol_timeout, wpa_auth, sm);
3604 }
3605}
c10347f2
JM		 3606
3607
3608int wpa_auth_uses_sae(struct wpa_state_machine *sm)
3609{
3610 if (sm == NULL)
3611 return 0;
3612 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
3613}
aa189ac9
JM		 3614
3615
3616int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
3617{
3618 if (sm == NULL)
3619 return 0;
3620 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
3621}
25ef8529
JM		 3622
3623
3624#ifdef CONFIG_P2P
3625int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
3626{
3627 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
3628 return -1;
3629 os_memcpy(addr, sm->ip_addr, 4);
3630 return 0;
3631}
3632#endif /* CONFIG_P2P */
cbc210de
JM		 3633
3634
3635int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
3636 struct radius_das_attrs *attr)
3637{
3638 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
3639}
34782730
JM		 3640
3641
3642void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
3643{
3644 struct wpa_group *group;
3645
3646 if (!wpa_auth)
3647 return;
3648 for (group = wpa_auth->group; group; group = group->next)
3649 wpa_group_config_group_keys(wpa_auth, group);
3650}
Unnamed repository; edit this file 'description' to name the repository.