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