Line data Source code
1 : /*
2 : * IEEE 802.11 RSN / WPA Authenticator
3 : * Copyright (c) 2004-2013, Jouni Malinen <j@w1.fi>
4 : *
5 : * This software may be distributed under the terms of the BSD license.
6 : * See README for more details.
7 : */
8 :
9 : #include "utils/includes.h"
10 :
11 : #include "utils/common.h"
12 : #include "utils/eloop.h"
13 : #include "utils/state_machine.h"
14 : #include "utils/bitfield.h"
15 : #include "common/ieee802_11_defs.h"
16 : #include "crypto/aes_wrap.h"
17 : #include "crypto/crypto.h"
18 : #include "crypto/sha1.h"
19 : #include "crypto/sha256.h"
20 : #include "crypto/random.h"
21 : #include "eapol_auth/eapol_auth_sm.h"
22 : #include "ap_config.h"
23 : #include "ieee802_11.h"
24 : #include "wpa_auth.h"
25 : #include "pmksa_cache_auth.h"
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 :
34 : static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
35 : static int wpa_sm_step(struct wpa_state_machine *sm);
36 : static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
37 : static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
38 : static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
39 : struct wpa_group *group);
40 : static void wpa_request_new_ptk(struct wpa_state_machine *sm);
41 : static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
42 : struct wpa_group *group);
43 : static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
44 : struct wpa_group *group);
45 :
46 : static const u32 dot11RSNAConfigGroupUpdateCount = 4;
47 : static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
48 : static const u32 eapol_key_timeout_first = 100; /* ms */
49 : static const u32 eapol_key_timeout_subseq = 1000; /* ms */
50 : static const u32 eapol_key_timeout_first_group = 500; /* ms */
51 :
52 : /* TODO: make these configurable */
53 : static const int dot11RSNAConfigPMKLifetime = 43200;
54 : static const int dot11RSNAConfigPMKReauthThreshold = 70;
55 : static const int dot11RSNAConfigSATimeout = 60;
56 :
57 :
58 2 : static inline int wpa_auth_mic_failure_report(
59 : struct wpa_authenticator *wpa_auth, const u8 *addr)
60 : {
61 2 : if (wpa_auth->cb.mic_failure_report)
62 2 : return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
63 0 : return 0;
64 : }
65 :
66 :
67 8416 : static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
68 : const u8 *addr, wpa_eapol_variable var,
69 : int value)
70 : {
71 8416 : if (wpa_auth->cb.set_eapol)
72 8416 : wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
73 8416 : }
74 :
75 :
76 8169 : static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
77 : const u8 *addr, wpa_eapol_variable var)
78 : {
79 8169 : if (wpa_auth->cb.get_eapol == NULL)
80 0 : return -1;
81 8169 : return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
82 : }
83 :
84 :
85 707 : static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
86 : const u8 *addr,
87 : const u8 *p2p_dev_addr,
88 : const u8 *prev_psk)
89 : {
90 707 : if (wpa_auth->cb.get_psk == NULL)
91 0 : return NULL;
92 707 : return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
93 : prev_psk);
94 : }
95 :
96 :
97 308 : static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
98 : const u8 *addr, u8 *msk, size_t *len)
99 : {
100 308 : if (wpa_auth->cb.get_msk == NULL)
101 0 : return -1;
102 308 : return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
103 : }
104 :
105 :
106 6350 : static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
107 : int vlan_id,
108 : enum wpa_alg alg, const u8 *addr, int idx,
109 : u8 *key, size_t key_len)
110 : {
111 6350 : if (wpa_auth->cb.set_key == NULL)
112 0 : return -1;
113 6350 : return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
114 : key, key_len);
115 : }
116 :
117 :
118 615 : static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
119 : const u8 *addr, int idx, u8 *seq)
120 : {
121 615 : if (wpa_auth->cb.get_seqnum == NULL)
122 0 : return -1;
123 615 : return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
124 : }
125 :
126 :
127 : static inline int
128 1173 : wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
129 : const u8 *data, size_t data_len, int encrypt)
130 : {
131 1173 : if (wpa_auth->cb.send_eapol == NULL)
132 0 : return -1;
133 1173 : return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
134 : encrypt);
135 : }
136 :
137 :
138 126 : int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
139 : int (*cb)(struct wpa_state_machine *sm, void *ctx),
140 : void *cb_ctx)
141 : {
142 126 : if (wpa_auth->cb.for_each_sta == NULL)
143 0 : return 0;
144 126 : return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
145 : }
146 :
147 :
148 6 : int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
149 : int (*cb)(struct wpa_authenticator *a, void *ctx),
150 : void *cb_ctx)
151 : {
152 6 : if (wpa_auth->cb.for_each_auth == NULL)
153 0 : return 0;
154 6 : return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
155 : }
156 :
157 :
158 5874 : void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
159 : logger_level level, const char *txt)
160 : {
161 5874 : if (wpa_auth->cb.logger == NULL)
162 5874 : return;
163 5874 : wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
164 : }
165 :
166 :
167 3699 : void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
168 : logger_level level, const char *fmt, ...)
169 : {
170 : char *format;
171 : int maxlen;
172 : va_list ap;
173 :
174 3699 : if (wpa_auth->cb.logger == NULL)
175 0 : return;
176 :
177 3699 : maxlen = os_strlen(fmt) + 100;
178 3699 : format = os_malloc(maxlen);
179 3699 : if (!format)
180 0 : return;
181 :
182 3699 : va_start(ap, fmt);
183 3699 : vsnprintf(format, maxlen, fmt, ap);
184 3699 : va_end(ap);
185 :
186 3699 : wpa_auth_logger(wpa_auth, addr, level, format);
187 :
188 3699 : os_free(format);
189 : }
190 :
191 :
192 3 : static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
193 : const u8 *addr)
194 : {
195 3 : if (wpa_auth->cb.disconnect == NULL)
196 3 : return;
197 3 : wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
198 3 : wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
199 : WLAN_REASON_PREV_AUTH_NOT_VALID);
200 : }
201 :
202 :
203 3389 : static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
204 : {
205 3389 : int ret = 0;
206 : #ifdef CONFIG_IEEE80211R
207 3389 : if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
208 122 : ret = 1;
209 : #endif /* CONFIG_IEEE80211R */
210 : #ifdef CONFIG_IEEE80211W
211 3389 : if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
212 100 : ret = 1;
213 : #endif /* CONFIG_IEEE80211W */
214 3389 : if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
215 8 : ret = 1;
216 3389 : return ret;
217 : }
218 :
219 :
220 1 : static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
221 : {
222 1 : struct wpa_authenticator *wpa_auth = eloop_ctx;
223 :
224 1 : if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
225 0 : wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
226 : "initialization.");
227 : } else {
228 1 : wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
229 1 : wpa_hexdump_key(MSG_DEBUG, "GMK",
230 1 : wpa_auth->group->GMK, WPA_GMK_LEN);
231 : }
232 :
233 1 : if (wpa_auth->conf.wpa_gmk_rekey) {
234 1 : eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
235 : wpa_rekey_gmk, wpa_auth, NULL);
236 : }
237 1 : }
238 :
239 :
240 9 : static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
241 : {
242 9 : struct wpa_authenticator *wpa_auth = eloop_ctx;
243 : struct wpa_group *group;
244 :
245 9 : wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
246 18 : for (group = wpa_auth->group; group; group = group->next) {
247 9 : group->GTKReKey = TRUE;
248 : do {
249 9 : group->changed = FALSE;
250 9 : wpa_group_sm_step(wpa_auth, group);
251 9 : } while (group->changed);
252 : }
253 :
254 9 : if (wpa_auth->conf.wpa_group_rekey) {
255 9 : eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
256 : 0, wpa_rekey_gtk, wpa_auth, NULL);
257 : }
258 9 : }
259 :
260 :
261 3 : static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
262 : {
263 3 : struct wpa_authenticator *wpa_auth = eloop_ctx;
264 3 : struct wpa_state_machine *sm = timeout_ctx;
265 :
266 3 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
267 3 : wpa_request_new_ptk(sm);
268 3 : wpa_sm_step(sm);
269 3 : }
270 :
271 :
272 120 : static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
273 : {
274 120 : if (sm->pmksa == ctx)
275 2 : sm->pmksa = NULL;
276 120 : return 0;
277 : }
278 :
279 :
280 107 : static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
281 : void *ctx)
282 : {
283 107 : struct wpa_authenticator *wpa_auth = ctx;
284 107 : wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
285 107 : }
286 :
287 :
288 804 : static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
289 : struct wpa_group *group)
290 : {
291 : u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
292 : u8 rkey[32];
293 : unsigned long ptr;
294 :
295 804 : if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
296 0 : return -1;
297 804 : wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
298 :
299 : /*
300 : * Counter = PRF-256(Random number, "Init Counter",
301 : * Local MAC Address || Time)
302 : */
303 804 : os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
304 804 : wpa_get_ntp_timestamp(buf + ETH_ALEN);
305 804 : ptr = (unsigned long) group;
306 804 : os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
307 804 : if (random_get_bytes(rkey, sizeof(rkey)) < 0)
308 0 : return -1;
309 :
310 804 : if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
311 804 : group->Counter, WPA_NONCE_LEN) < 0)
312 0 : return -1;
313 804 : wpa_hexdump_key(MSG_DEBUG, "Key Counter",
314 804 : group->Counter, WPA_NONCE_LEN);
315 :
316 804 : return 0;
317 : }
318 :
319 :
320 443 : static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
321 : int vlan_id, int delay_init)
322 : {
323 : struct wpa_group *group;
324 :
325 443 : group = os_zalloc(sizeof(struct wpa_group));
326 443 : if (group == NULL)
327 0 : return NULL;
328 :
329 443 : group->GTKAuthenticator = TRUE;
330 443 : group->vlan_id = vlan_id;
331 443 : group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
332 :
333 : if (random_pool_ready() != 1) {
334 : wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
335 : "for secure operations - update keys later when "
336 : "the first station connects");
337 : }
338 :
339 : /*
340 : * Set initial GMK/Counter value here. The actual values that will be
341 : * used in negotiations will be set once the first station tries to
342 : * connect. This allows more time for collecting additional randomness
343 : * on embedded devices.
344 : */
345 443 : if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
346 0 : wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
347 : "initialization.");
348 0 : os_free(group);
349 0 : return NULL;
350 : }
351 :
352 443 : group->GInit = TRUE;
353 443 : if (delay_init) {
354 437 : wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
355 : "until Beacon frames have been configured");
356 : /* Initialization is completed in wpa_init_keys(). */
357 : } else {
358 6 : wpa_group_sm_step(wpa_auth, group);
359 6 : group->GInit = FALSE;
360 6 : wpa_group_sm_step(wpa_auth, group);
361 : }
362 :
363 443 : return group;
364 : }
365 :
366 :
367 : /**
368 : * wpa_init - Initialize WPA authenticator
369 : * @addr: Authenticator address
370 : * @conf: Configuration for WPA authenticator
371 : * @cb: Callback functions for WPA authenticator
372 : * Returns: Pointer to WPA authenticator data or %NULL on failure
373 : */
374 437 : struct wpa_authenticator * wpa_init(const u8 *addr,
375 : struct wpa_auth_config *conf,
376 : struct wpa_auth_callbacks *cb)
377 : {
378 : struct wpa_authenticator *wpa_auth;
379 :
380 437 : wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
381 437 : if (wpa_auth == NULL)
382 0 : return NULL;
383 437 : os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
384 437 : os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
385 437 : os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
386 :
387 437 : if (wpa_auth_gen_wpa_ie(wpa_auth)) {
388 0 : wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
389 0 : os_free(wpa_auth);
390 0 : return NULL;
391 : }
392 :
393 437 : wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
394 437 : if (wpa_auth->group == NULL) {
395 0 : os_free(wpa_auth->wpa_ie);
396 0 : os_free(wpa_auth);
397 0 : return NULL;
398 : }
399 :
400 437 : wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
401 : wpa_auth);
402 437 : if (wpa_auth->pmksa == NULL) {
403 0 : wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
404 0 : os_free(wpa_auth->wpa_ie);
405 0 : os_free(wpa_auth);
406 0 : return NULL;
407 : }
408 :
409 : #ifdef CONFIG_IEEE80211R
410 437 : wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
411 437 : if (wpa_auth->ft_pmk_cache == NULL) {
412 0 : wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
413 0 : os_free(wpa_auth->wpa_ie);
414 0 : pmksa_cache_auth_deinit(wpa_auth->pmksa);
415 0 : os_free(wpa_auth);
416 0 : return NULL;
417 : }
418 : #endif /* CONFIG_IEEE80211R */
419 :
420 437 : if (wpa_auth->conf.wpa_gmk_rekey) {
421 437 : eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
422 : wpa_rekey_gmk, wpa_auth, NULL);
423 : }
424 :
425 437 : if (wpa_auth->conf.wpa_group_rekey) {
426 437 : eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
427 : wpa_rekey_gtk, wpa_auth, NULL);
428 : }
429 :
430 : #ifdef CONFIG_P2P
431 : if (WPA_GET_BE32(conf->ip_addr_start)) {
432 : int count = WPA_GET_BE32(conf->ip_addr_end) -
433 : WPA_GET_BE32(conf->ip_addr_start) + 1;
434 : if (count > 1000)
435 : count = 1000;
436 : if (count > 0)
437 : wpa_auth->ip_pool = bitfield_alloc(count);
438 : }
439 : #endif /* CONFIG_P2P */
440 :
441 437 : return wpa_auth;
442 : }
443 :
444 :
445 437 : int wpa_init_keys(struct wpa_authenticator *wpa_auth)
446 : {
447 437 : struct wpa_group *group = wpa_auth->group;
448 :
449 437 : wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
450 : "keys");
451 437 : wpa_group_sm_step(wpa_auth, group);
452 437 : group->GInit = FALSE;
453 437 : wpa_group_sm_step(wpa_auth, group);
454 437 : if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
455 0 : return -1;
456 437 : return 0;
457 : }
458 :
459 :
460 : /**
461 : * wpa_deinit - Deinitialize WPA authenticator
462 : * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
463 : */
464 437 : void wpa_deinit(struct wpa_authenticator *wpa_auth)
465 : {
466 : struct wpa_group *group, *prev;
467 :
468 437 : eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
469 437 : eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
470 :
471 : #ifdef CONFIG_PEERKEY
472 874 : while (wpa_auth->stsl_negotiations)
473 0 : wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
474 : #endif /* CONFIG_PEERKEY */
475 :
476 437 : pmksa_cache_auth_deinit(wpa_auth->pmksa);
477 :
478 : #ifdef CONFIG_IEEE80211R
479 437 : wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
480 437 : wpa_auth->ft_pmk_cache = NULL;
481 : #endif /* CONFIG_IEEE80211R */
482 :
483 : #ifdef CONFIG_P2P
484 : bitfield_free(wpa_auth->ip_pool);
485 : #endif /* CONFIG_P2P */
486 :
487 :
488 437 : os_free(wpa_auth->wpa_ie);
489 :
490 437 : group = wpa_auth->group;
491 1317 : while (group) {
492 443 : prev = group;
493 443 : group = group->next;
494 443 : os_free(prev);
495 : }
496 :
497 437 : os_free(wpa_auth);
498 437 : }
499 :
500 :
501 : /**
502 : * wpa_reconfig - Update WPA authenticator configuration
503 : * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
504 : * @conf: Configuration for WPA authenticator
505 : */
506 2 : int wpa_reconfig(struct wpa_authenticator *wpa_auth,
507 : struct wpa_auth_config *conf)
508 : {
509 : struct wpa_group *group;
510 2 : if (wpa_auth == NULL)
511 0 : return 0;
512 :
513 2 : os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
514 2 : if (wpa_auth_gen_wpa_ie(wpa_auth)) {
515 0 : wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
516 0 : return -1;
517 : }
518 :
519 : /*
520 : * Reinitialize GTK to make sure it is suitable for the new
521 : * configuration.
522 : */
523 2 : group = wpa_auth->group;
524 2 : group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
525 2 : group->GInit = TRUE;
526 2 : wpa_group_sm_step(wpa_auth, group);
527 2 : group->GInit = FALSE;
528 2 : wpa_group_sm_step(wpa_auth, group);
529 :
530 2 : return 0;
531 : }
532 :
533 :
534 : struct wpa_state_machine *
535 769 : wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
536 : const u8 *p2p_dev_addr)
537 : {
538 : struct wpa_state_machine *sm;
539 :
540 769 : if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
541 0 : return NULL;
542 :
543 769 : sm = os_zalloc(sizeof(struct wpa_state_machine));
544 769 : if (sm == NULL)
545 0 : return NULL;
546 769 : os_memcpy(sm->addr, addr, ETH_ALEN);
547 769 : if (p2p_dev_addr)
548 0 : os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
549 :
550 769 : sm->wpa_auth = wpa_auth;
551 769 : sm->group = wpa_auth->group;
552 :
553 769 : return sm;
554 : }
555 :
556 :
557 1296 : int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
558 : struct wpa_state_machine *sm)
559 : {
560 1296 : if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
561 278 : return -1;
562 :
563 : #ifdef CONFIG_IEEE80211R
564 1018 : if (sm->ft_completed) {
565 221 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
566 : "FT authentication already completed - do not "
567 : "start 4-way handshake");
568 : /* Go to PTKINITDONE state to allow GTK rekeying */
569 221 : sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
570 221 : return 0;
571 : }
572 : #endif /* CONFIG_IEEE80211R */
573 :
574 797 : if (sm->started) {
575 46 : os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
576 46 : sm->ReAuthenticationRequest = TRUE;
577 46 : return wpa_sm_step(sm);
578 : }
579 :
580 751 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
581 : "start authentication");
582 751 : sm->started = 1;
583 :
584 751 : sm->Init = TRUE;
585 751 : if (wpa_sm_step(sm) == 1)
586 0 : return 1; /* should not really happen */
587 751 : sm->Init = FALSE;
588 751 : sm->AuthenticationRequest = TRUE;
589 751 : return wpa_sm_step(sm);
590 : }
591 :
592 :
593 277 : void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
594 : {
595 : /* WPA/RSN was not used - clear WPA state. This is needed if the STA
596 : * reassociates back to the same AP while the previous entry for the
597 : * STA has not yet been removed. */
598 277 : if (sm == NULL)
599 554 : return;
600 :
601 0 : sm->wpa_key_mgmt = 0;
602 : }
603 :
604 :
605 769 : static void wpa_free_sta_sm(struct wpa_state_machine *sm)
606 : {
607 : #ifdef CONFIG_P2P
608 : if (WPA_GET_BE32(sm->ip_addr)) {
609 : u32 start;
610 : wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
611 : "address %u.%u.%u.%u from " MACSTR,
612 : sm->ip_addr[0], sm->ip_addr[1],
613 : sm->ip_addr[2], sm->ip_addr[3],
614 : MAC2STR(sm->addr));
615 : start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
616 : bitfield_clear(sm->wpa_auth->ip_pool,
617 : WPA_GET_BE32(sm->ip_addr) - start);
618 : }
619 : #endif /* CONFIG_P2P */
620 769 : if (sm->GUpdateStationKeys) {
621 1 : sm->group->GKeyDoneStations--;
622 1 : sm->GUpdateStationKeys = FALSE;
623 : }
624 : #ifdef CONFIG_IEEE80211R
625 769 : os_free(sm->assoc_resp_ftie);
626 769 : wpabuf_free(sm->ft_pending_req_ies);
627 : #endif /* CONFIG_IEEE80211R */
628 769 : os_free(sm->last_rx_eapol_key);
629 769 : os_free(sm->wpa_ie);
630 769 : os_free(sm);
631 769 : }
632 :
633 :
634 1056 : void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
635 : {
636 1056 : if (sm == NULL)
637 1343 : return;
638 :
639 769 : if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
640 2 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
641 : "strict rekeying - force GTK rekey since STA "
642 : "is leaving");
643 2 : eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
644 2 : eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
645 : NULL);
646 : }
647 :
648 769 : eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
649 769 : sm->pending_1_of_4_timeout = 0;
650 769 : eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
651 769 : eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
652 769 : if (sm->in_step_loop) {
653 : /* Must not free state machine while wpa_sm_step() is running.
654 : * Freeing will be completed in the end of wpa_sm_step(). */
655 0 : wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
656 0 : "machine deinit for " MACSTR, MAC2STR(sm->addr));
657 0 : sm->pending_deinit = 1;
658 : } else
659 769 : wpa_free_sta_sm(sm);
660 : }
661 :
662 :
663 7 : static void wpa_request_new_ptk(struct wpa_state_machine *sm)
664 : {
665 7 : if (sm == NULL)
666 7 : return;
667 :
668 7 : sm->PTKRequest = TRUE;
669 7 : sm->PTK_valid = 0;
670 : }
671 :
672 :
673 1162 : static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
674 : const u8 *replay_counter)
675 : {
676 : int i;
677 1162 : for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
678 1162 : if (!ctr[i].valid)
679 0 : break;
680 1162 : if (os_memcmp(replay_counter, ctr[i].counter,
681 : WPA_REPLAY_COUNTER_LEN) == 0)
682 1162 : return 1;
683 : }
684 0 : return 0;
685 : }
686 :
687 :
688 2324 : static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
689 : const u8 *replay_counter)
690 : {
691 : int i;
692 11620 : for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
693 9296 : if (ctr[i].valid &&
694 1162 : (replay_counter == NULL ||
695 1162 : os_memcmp(replay_counter, ctr[i].counter,
696 : WPA_REPLAY_COUNTER_LEN) == 0))
697 1162 : ctr[i].valid = FALSE;
698 : }
699 2324 : }
700 :
701 :
702 : #ifdef CONFIG_IEEE80211R
703 19 : static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
704 : struct wpa_state_machine *sm,
705 : struct wpa_eapol_ie_parse *kde)
706 : {
707 : struct wpa_ie_data ie;
708 : struct rsn_mdie *mdie;
709 :
710 38 : if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
711 38 : ie.num_pmkid != 1 || ie.pmkid == NULL) {
712 0 : wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
713 : "FT 4-way handshake message 2/4");
714 0 : return -1;
715 : }
716 :
717 19 : os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
718 19 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
719 19 : sm->sup_pmk_r1_name, PMKID_LEN);
720 :
721 19 : if (!kde->mdie || !kde->ftie) {
722 0 : wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
723 0 : "message 2/4", kde->mdie ? "FTIE" : "MDIE");
724 0 : return -1;
725 : }
726 :
727 19 : mdie = (struct rsn_mdie *) (kde->mdie + 2);
728 38 : if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
729 19 : os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
730 : MOBILITY_DOMAIN_ID_LEN) != 0) {
731 0 : wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
732 0 : return -1;
733 : }
734 :
735 38 : if (sm->assoc_resp_ftie &&
736 38 : (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
737 19 : os_memcmp(kde->ftie, sm->assoc_resp_ftie,
738 : 2 + sm->assoc_resp_ftie[1]) != 0)) {
739 0 : wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
740 0 : wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
741 0 : kde->ftie, kde->ftie_len);
742 0 : wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
743 0 : sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
744 0 : return -1;
745 : }
746 :
747 19 : return 0;
748 : }
749 : #endif /* CONFIG_IEEE80211R */
750 :
751 :
752 2 : static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
753 : struct wpa_state_machine *sm, int group)
754 : {
755 : /* Supplicant reported a Michael MIC error */
756 2 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
757 : "received EAPOL-Key Error Request "
758 : "(STA detected Michael MIC failure (group=%d))",
759 : group);
760 :
761 2 : if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
762 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
763 : "ignore Michael MIC failure report since "
764 : "group cipher is not TKIP");
765 2 : } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
766 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
767 : "ignore Michael MIC failure report since "
768 : "pairwise cipher is not TKIP");
769 : } else {
770 2 : if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
771 1 : return 1; /* STA entry was removed */
772 1 : sm->dot11RSNAStatsTKIPRemoteMICFailures++;
773 1 : wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
774 : }
775 :
776 : /*
777 : * Error report is not a request for a new key handshake, but since
778 : * Authenticator may do it, let's change the keys now anyway.
779 : */
780 1 : wpa_request_new_ptk(sm);
781 1 : return 0;
782 : }
783 :
784 :
785 1173 : void wpa_receive(struct wpa_authenticator *wpa_auth,
786 : struct wpa_state_machine *sm,
787 : u8 *data, size_t data_len)
788 : {
789 : struct ieee802_1x_hdr *hdr;
790 : struct wpa_eapol_key *key;
791 : u16 key_info, key_data_length;
792 : enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
793 : SMK_M1, SMK_M3, SMK_ERROR } msg;
794 : char *msgtxt;
795 : struct wpa_eapol_ie_parse kde;
796 : int ft;
797 : const u8 *eapol_key_ie;
798 : size_t eapol_key_ie_len;
799 :
800 1173 : if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
801 4 : return;
802 :
803 1173 : if (data_len < sizeof(*hdr) + sizeof(*key))
804 0 : return;
805 :
806 1173 : hdr = (struct ieee802_1x_hdr *) data;
807 1173 : key = (struct wpa_eapol_key *) (hdr + 1);
808 1173 : key_info = WPA_GET_BE16(key->key_info);
809 1173 : key_data_length = WPA_GET_BE16(key->key_data_length);
810 9384 : wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
811 : " key_info=0x%x type=%u key_data_length=%u",
812 8211 : MAC2STR(sm->addr), key_info, key->type, key_data_length);
813 1173 : if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
814 0 : wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
815 : "key_data overflow (%d > %lu)",
816 : key_data_length,
817 : (unsigned long) (data_len - sizeof(*hdr) -
818 : sizeof(*key)));
819 0 : return;
820 : }
821 :
822 1173 : if (sm->wpa == WPA_VERSION_WPA2) {
823 1118 : if (key->type == EAPOL_KEY_TYPE_WPA) {
824 : /*
825 : * Some deployed station implementations seem to send
826 : * msg 4/4 with incorrect type value in WPA2 mode.
827 : */
828 0 : wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
829 : "with unexpected WPA type in RSN mode");
830 1118 : } else if (key->type != EAPOL_KEY_TYPE_RSN) {
831 0 : wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
832 : "unexpected type %d in RSN mode",
833 0 : key->type);
834 0 : return;
835 : }
836 : } else {
837 55 : if (key->type != EAPOL_KEY_TYPE_WPA) {
838 0 : wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
839 : "unexpected type %d in WPA mode",
840 0 : key->type);
841 0 : return;
842 : }
843 : }
844 :
845 1173 : wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
846 : WPA_NONCE_LEN);
847 1173 : wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
848 1173 : key->replay_counter, WPA_REPLAY_COUNTER_LEN);
849 :
850 : /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
851 : * are set */
852 :
853 1173 : if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
854 : (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
855 6 : if (key_info & WPA_KEY_INFO_ERROR) {
856 2 : msg = SMK_ERROR;
857 2 : msgtxt = "SMK Error";
858 : } else {
859 4 : msg = SMK_M1;
860 4 : msgtxt = "SMK M1";
861 : }
862 1167 : } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
863 1 : msg = SMK_M3;
864 1 : msgtxt = "SMK M3";
865 1166 : } else if (key_info & WPA_KEY_INFO_REQUEST) {
866 5 : msg = REQUEST;
867 5 : msgtxt = "Request";
868 1161 : } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
869 26 : msg = GROUP_2;
870 26 : msgtxt = "2/2 Group";
871 1135 : } else if (key_data_length == 0) {
872 565 : msg = PAIRWISE_4;
873 565 : msgtxt = "4/4 Pairwise";
874 : } else {
875 570 : msg = PAIRWISE_2;
876 570 : msgtxt = "2/4 Pairwise";
877 : }
878 :
879 : /* TODO: key_info type validation for PeerKey */
880 1173 : if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
881 : msg == GROUP_2) {
882 1166 : u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
883 1222 : if (sm->pairwise == WPA_CIPHER_CCMP ||
884 56 : sm->pairwise == WPA_CIPHER_GCMP) {
885 1185 : if (wpa_use_aes_cmac(sm) &&
886 146 : sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
887 : ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
888 0 : wpa_auth_logger(wpa_auth, sm->addr,
889 : LOGGER_WARNING,
890 : "advertised support for "
891 : "AES-128-CMAC, but did not "
892 : "use it");
893 0 : return;
894 : }
895 :
896 1110 : if (!wpa_use_aes_cmac(sm) &&
897 : ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
898 0 : wpa_auth_logger(wpa_auth, sm->addr,
899 : LOGGER_WARNING,
900 : "did not use HMAC-SHA1-AES "
901 : "with CCMP/GCMP");
902 0 : return;
903 : }
904 : }
905 : }
906 :
907 1173 : if (key_info & WPA_KEY_INFO_REQUEST) {
908 14 : if (sm->req_replay_counter_used &&
909 3 : os_memcmp(key->replay_counter, sm->req_replay_counter,
910 : WPA_REPLAY_COUNTER_LEN) <= 0) {
911 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
912 : "received EAPOL-Key request with "
913 : "replayed counter");
914 0 : return;
915 : }
916 : }
917 :
918 2335 : if (!(key_info & WPA_KEY_INFO_REQUEST) &&
919 1162 : !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
920 : int i;
921 :
922 0 : if (msg == PAIRWISE_2 &&
923 0 : wpa_replay_counter_valid(sm->prev_key_replay,
924 0 : key->replay_counter) &&
925 0 : sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
926 0 : os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
927 : {
928 : /*
929 : * Some supplicant implementations (e.g., Windows XP
930 : * WZC) update SNonce for each EAPOL-Key 2/4. This
931 : * breaks the workaround on accepting any of the
932 : * pending requests, so allow the SNonce to be updated
933 : * even if we have already sent out EAPOL-Key 3/4.
934 : */
935 0 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
936 : "Process SNonce update from STA "
937 : "based on retransmitted EAPOL-Key "
938 : "1/4");
939 0 : sm->update_snonce = 1;
940 0 : wpa_replay_counter_mark_invalid(sm->prev_key_replay,
941 0 : key->replay_counter);
942 0 : goto continue_processing;
943 : }
944 :
945 0 : if (msg == PAIRWISE_2 &&
946 0 : wpa_replay_counter_valid(sm->prev_key_replay,
947 0 : key->replay_counter) &&
948 0 : sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
949 0 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
950 : "ignore retransmitted EAPOL-Key %s - "
951 : "SNonce did not change", msgtxt);
952 : } else {
953 0 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
954 : "received EAPOL-Key %s with "
955 : "unexpected replay counter", msgtxt);
956 : }
957 0 : for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
958 0 : if (!sm->key_replay[i].valid)
959 0 : break;
960 0 : wpa_hexdump(MSG_DEBUG, "pending replay counter",
961 0 : sm->key_replay[i].counter,
962 : WPA_REPLAY_COUNTER_LEN);
963 : }
964 0 : wpa_hexdump(MSG_DEBUG, "received replay counter",
965 0 : key->replay_counter, WPA_REPLAY_COUNTER_LEN);
966 0 : return;
967 : }
968 :
969 : continue_processing:
970 1173 : switch (msg) {
971 : case PAIRWISE_2:
972 570 : if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
973 0 : sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
974 0 : (!sm->update_snonce ||
975 0 : sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
976 0 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
977 : "received EAPOL-Key msg 2/4 in "
978 : "invalid state (%d) - dropped",
979 0 : sm->wpa_ptk_state);
980 0 : return;
981 : }
982 : random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
983 570 : if (sm->group->reject_4way_hs_for_entropy) {
984 : /*
985 : * The system did not have enough entropy to generate
986 : * strong random numbers. Reject the first 4-way
987 : * handshake(s) and collect some entropy based on the
988 : * information from it. Once enough entropy is
989 : * available, the next atempt will trigger GMK/Key
990 : * Counter update and the station will be allowed to
991 : * continue.
992 : */
993 0 : wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
994 : "collect more entropy for random number "
995 : "generation");
996 : random_mark_pool_ready();
997 0 : wpa_sta_disconnect(wpa_auth, sm->addr);
998 0 : return;
999 : }
1000 570 : if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length,
1001 : &kde) < 0) {
1002 0 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1003 : "received EAPOL-Key msg 2/4 with "
1004 : "invalid Key Data contents");
1005 0 : return;
1006 : }
1007 570 : if (kde.rsn_ie) {
1008 551 : eapol_key_ie = kde.rsn_ie;
1009 551 : eapol_key_ie_len = kde.rsn_ie_len;
1010 19 : } else if (kde.osen) {
1011 2 : eapol_key_ie = kde.osen;
1012 2 : eapol_key_ie_len = kde.osen_len;
1013 : } else {
1014 17 : eapol_key_ie = kde.wpa_ie;
1015 17 : eapol_key_ie_len = kde.wpa_ie_len;
1016 : }
1017 1123 : ft = sm->wpa == WPA_VERSION_WPA2 &&
1018 553 : wpa_key_mgmt_ft(sm->wpa_key_mgmt);
1019 1140 : if (sm->wpa_ie == NULL ||
1020 1140 : wpa_compare_rsn_ie(ft,
1021 570 : sm->wpa_ie, sm->wpa_ie_len,
1022 : eapol_key_ie, eapol_key_ie_len)) {
1023 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1024 : "WPA IE from (Re)AssocReq did not "
1025 : "match with msg 2/4");
1026 0 : if (sm->wpa_ie) {
1027 0 : wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
1028 0 : sm->wpa_ie, sm->wpa_ie_len);
1029 : }
1030 0 : wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1031 : eapol_key_ie, eapol_key_ie_len);
1032 : /* MLME-DEAUTHENTICATE.request */
1033 0 : wpa_sta_disconnect(wpa_auth, sm->addr);
1034 0 : return;
1035 : }
1036 : #ifdef CONFIG_IEEE80211R
1037 570 : if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
1038 0 : wpa_sta_disconnect(wpa_auth, sm->addr);
1039 0 : return;
1040 : }
1041 : #endif /* CONFIG_IEEE80211R */
1042 : #ifdef CONFIG_P2P
1043 : if (kde.ip_addr_req && kde.ip_addr_req[0] &&
1044 : wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
1045 : int idx;
1046 : wpa_printf(MSG_DEBUG, "P2P: IP address requested in "
1047 : "EAPOL-Key exchange");
1048 : idx = bitfield_get_first_zero(wpa_auth->ip_pool);
1049 : if (idx >= 0) {
1050 : u32 start = WPA_GET_BE32(wpa_auth->conf.
1051 : ip_addr_start);
1052 : bitfield_set(wpa_auth->ip_pool, idx);
1053 : WPA_PUT_BE32(sm->ip_addr, start + idx);
1054 : wpa_printf(MSG_DEBUG, "P2P: Assigned IP "
1055 : "address %u.%u.%u.%u to " MACSTR,
1056 : sm->ip_addr[0], sm->ip_addr[1],
1057 : sm->ip_addr[2], sm->ip_addr[3],
1058 : MAC2STR(sm->addr));
1059 : }
1060 : }
1061 : #endif /* CONFIG_P2P */
1062 570 : break;
1063 : case PAIRWISE_4:
1064 1130 : if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1065 565 : !sm->PTK_valid) {
1066 0 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1067 : "received EAPOL-Key msg 4/4 in "
1068 : "invalid state (%d) - dropped",
1069 0 : sm->wpa_ptk_state);
1070 0 : return;
1071 : }
1072 565 : break;
1073 : case GROUP_2:
1074 26 : if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1075 26 : || !sm->PTK_valid) {
1076 0 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1077 : "received EAPOL-Key msg 2/2 in "
1078 : "invalid state (%d) - dropped",
1079 0 : sm->wpa_ptk_group_state);
1080 0 : return;
1081 : }
1082 26 : break;
1083 : #ifdef CONFIG_PEERKEY
1084 : case SMK_M1:
1085 : case SMK_M3:
1086 : case SMK_ERROR:
1087 7 : if (!wpa_auth->conf.peerkey) {
1088 0 : wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1089 : "PeerKey use disabled - ignoring message");
1090 0 : return;
1091 : }
1092 7 : if (!sm->PTK_valid) {
1093 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1094 : "received EAPOL-Key msg SMK in "
1095 : "invalid state - dropped");
1096 0 : return;
1097 : }
1098 7 : break;
1099 : #else /* CONFIG_PEERKEY */
1100 : case SMK_M1:
1101 : case SMK_M3:
1102 : case SMK_ERROR:
1103 : return; /* STSL disabled - ignore SMK messages */
1104 : #endif /* CONFIG_PEERKEY */
1105 : case REQUEST:
1106 5 : break;
1107 : }
1108 :
1109 1173 : wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1110 : "received EAPOL-Key frame (%s)", msgtxt);
1111 :
1112 1173 : if (key_info & WPA_KEY_INFO_ACK) {
1113 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1114 : "received invalid EAPOL-Key: Key Ack set");
1115 0 : return;
1116 : }
1117 :
1118 1173 : if (!(key_info & WPA_KEY_INFO_MIC)) {
1119 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1120 : "received invalid EAPOL-Key: Key MIC not set");
1121 0 : return;
1122 : }
1123 :
1124 1173 : sm->MICVerified = FALSE;
1125 1173 : if (sm->PTK_valid && !sm->update_snonce) {
1126 603 : if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
1127 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1128 : "received EAPOL-Key with invalid MIC");
1129 0 : return;
1130 : }
1131 603 : sm->MICVerified = TRUE;
1132 603 : eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
1133 603 : sm->pending_1_of_4_timeout = 0;
1134 : }
1135 :
1136 1173 : if (key_info & WPA_KEY_INFO_REQUEST) {
1137 11 : if (sm->MICVerified) {
1138 11 : sm->req_replay_counter_used = 1;
1139 11 : os_memcpy(sm->req_replay_counter, key->replay_counter,
1140 : WPA_REPLAY_COUNTER_LEN);
1141 : } else {
1142 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1143 : "received EAPOL-Key request with "
1144 : "invalid MIC");
1145 0 : return;
1146 : }
1147 :
1148 : /*
1149 : * TODO: should decrypt key data field if encryption was used;
1150 : * even though MAC address KDE is not normally encrypted,
1151 : * supplicant is allowed to encrypt it.
1152 : */
1153 11 : if (msg == SMK_ERROR) {
1154 : #ifdef CONFIG_PEERKEY
1155 2 : wpa_smk_error(wpa_auth, sm, key);
1156 : #endif /* CONFIG_PEERKEY */
1157 2 : return;
1158 9 : } else if (key_info & WPA_KEY_INFO_ERROR) {
1159 2 : if (wpa_receive_error_report(
1160 : wpa_auth, sm,
1161 2 : !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1162 1 : return; /* STA entry was removed */
1163 7 : } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1164 3 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1165 : "received EAPOL-Key Request for new "
1166 : "4-Way Handshake");
1167 3 : wpa_request_new_ptk(sm);
1168 : #ifdef CONFIG_PEERKEY
1169 4 : } else if (msg == SMK_M1) {
1170 4 : wpa_smk_m1(wpa_auth, sm, key);
1171 : #endif /* CONFIG_PEERKEY */
1172 0 : } else if (key_data_length > 0 &&
1173 0 : wpa_parse_kde_ies((const u8 *) (key + 1),
1174 0 : key_data_length, &kde) == 0 &&
1175 0 : kde.mac_addr) {
1176 : } else {
1177 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1178 : "received EAPOL-Key Request for GTK "
1179 : "rekeying");
1180 0 : eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1181 0 : wpa_rekey_gtk(wpa_auth, NULL);
1182 : }
1183 : } else {
1184 : /* Do not allow the same key replay counter to be reused. */
1185 1162 : wpa_replay_counter_mark_invalid(sm->key_replay,
1186 1162 : key->replay_counter);
1187 :
1188 1162 : if (msg == PAIRWISE_2) {
1189 : /*
1190 : * Maintain a copy of the pending EAPOL-Key frames in
1191 : * case the EAPOL-Key frame was retransmitted. This is
1192 : * needed to allow EAPOL-Key msg 2/4 reply to another
1193 : * pending msg 1/4 to update the SNonce to work around
1194 : * unexpected supplicant behavior.
1195 : */
1196 570 : os_memcpy(sm->prev_key_replay, sm->key_replay,
1197 : sizeof(sm->key_replay));
1198 : } else {
1199 592 : os_memset(sm->prev_key_replay, 0,
1200 : sizeof(sm->prev_key_replay));
1201 : }
1202 :
1203 : /*
1204 : * Make sure old valid counters are not accepted anymore and
1205 : * do not get copied again.
1206 : */
1207 1162 : wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
1208 : }
1209 :
1210 : #ifdef CONFIG_PEERKEY
1211 1170 : if (msg == SMK_M3) {
1212 1 : wpa_smk_m3(wpa_auth, sm, key);
1213 1 : return;
1214 : }
1215 : #endif /* CONFIG_PEERKEY */
1216 :
1217 1169 : os_free(sm->last_rx_eapol_key);
1218 1169 : sm->last_rx_eapol_key = os_malloc(data_len);
1219 1169 : if (sm->last_rx_eapol_key == NULL)
1220 0 : return;
1221 1169 : os_memcpy(sm->last_rx_eapol_key, data, data_len);
1222 1169 : sm->last_rx_eapol_key_len = data_len;
1223 :
1224 1169 : sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
1225 1169 : sm->EAPOLKeyReceived = TRUE;
1226 1169 : sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1227 1169 : sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1228 1169 : os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1229 1169 : wpa_sm_step(sm);
1230 : }
1231 :
1232 :
1233 1029 : static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1234 : const u8 *gnonce, u8 *gtk, size_t gtk_len)
1235 : {
1236 : u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1237 : u8 *pos;
1238 1029 : int ret = 0;
1239 :
1240 : /* GTK = PRF-X(GMK, "Group key expansion",
1241 : * AA || GNonce || Time || random data)
1242 : * The example described in the IEEE 802.11 standard uses only AA and
1243 : * GNonce as inputs here. Add some more entropy since this derivation
1244 : * is done only at the Authenticator and as such, does not need to be
1245 : * exactly same.
1246 : */
1247 1029 : os_memcpy(data, addr, ETH_ALEN);
1248 1029 : os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1249 1029 : pos = data + ETH_ALEN + WPA_NONCE_LEN;
1250 1029 : wpa_get_ntp_timestamp(pos);
1251 1029 : pos += 8;
1252 1029 : if (random_get_bytes(pos, 16) < 0)
1253 0 : ret = -1;
1254 :
1255 : #ifdef CONFIG_IEEE80211W
1256 1029 : sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
1257 : #else /* CONFIG_IEEE80211W */
1258 : if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1259 : < 0)
1260 : ret = -1;
1261 : #endif /* CONFIG_IEEE80211W */
1262 :
1263 1029 : return ret;
1264 : }
1265 :
1266 :
1267 6 : static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1268 : {
1269 6 : struct wpa_authenticator *wpa_auth = eloop_ctx;
1270 6 : struct wpa_state_machine *sm = timeout_ctx;
1271 :
1272 6 : sm->pending_1_of_4_timeout = 0;
1273 6 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1274 6 : sm->TimeoutEvt = TRUE;
1275 6 : wpa_sm_step(sm);
1276 6 : }
1277 :
1278 :
1279 1173 : void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1280 : struct wpa_state_machine *sm, int key_info,
1281 : const u8 *key_rsc, const u8 *nonce,
1282 : const u8 *kde, size_t kde_len,
1283 : int keyidx, int encr, int force_version)
1284 : {
1285 : struct ieee802_1x_hdr *hdr;
1286 : struct wpa_eapol_key *key;
1287 : size_t len;
1288 : int alg;
1289 1173 : int key_data_len, pad_len = 0;
1290 : u8 *buf, *pos;
1291 : int version, pairwise;
1292 : int i;
1293 :
1294 1173 : len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
1295 :
1296 1173 : if (force_version)
1297 0 : version = force_version;
1298 1173 : else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
1299 4 : version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
1300 1169 : else if (wpa_use_aes_cmac(sm))
1301 72 : version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1302 1097 : else if (sm->pairwise != WPA_CIPHER_TKIP)
1303 1042 : version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1304 : else
1305 55 : version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1306 :
1307 1173 : pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1308 :
1309 4692 : wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1310 : "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1311 : "encr=%d)",
1312 : version,
1313 1173 : (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1314 1173 : (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1315 1173 : (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1316 1173 : (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1317 : pairwise, (unsigned long) kde_len, keyidx, encr);
1318 :
1319 1173 : key_data_len = kde_len;
1320 :
1321 1304 : if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1322 258 : sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1323 1118 : version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1324 560 : pad_len = key_data_len % 8;
1325 560 : if (pad_len)
1326 548 : pad_len = 8 - pad_len;
1327 560 : key_data_len += pad_len + 8;
1328 : }
1329 :
1330 1173 : len += key_data_len;
1331 :
1332 1173 : hdr = os_zalloc(len);
1333 1173 : if (hdr == NULL)
1334 0 : return;
1335 1173 : hdr->version = wpa_auth->conf.eapol_version;
1336 1173 : hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1337 1173 : hdr->length = host_to_be16(len - sizeof(*hdr));
1338 1173 : key = (struct wpa_eapol_key *) (hdr + 1);
1339 :
1340 1173 : key->type = sm->wpa == WPA_VERSION_WPA2 ?
1341 : EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1342 1173 : key_info |= version;
1343 1173 : if (encr && sm->wpa == WPA_VERSION_WPA2)
1344 561 : key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1345 1173 : if (sm->wpa != WPA_VERSION_WPA2)
1346 52 : key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1347 1173 : WPA_PUT_BE16(key->key_info, key_info);
1348 :
1349 1173 : alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1350 1173 : WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
1351 1173 : if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1352 8 : WPA_PUT_BE16(key->key_length, 0);
1353 :
1354 : /* FIX: STSL: what to use as key_replay_counter? */
1355 4692 : for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1356 3519 : sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1357 3519 : os_memcpy(sm->key_replay[i].counter,
1358 : sm->key_replay[i - 1].counter,
1359 : WPA_REPLAY_COUNTER_LEN);
1360 : }
1361 1173 : inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1362 1173 : os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1363 : WPA_REPLAY_COUNTER_LEN);
1364 1173 : sm->key_replay[0].valid = TRUE;
1365 :
1366 1173 : if (nonce)
1367 1170 : os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1368 :
1369 1173 : if (key_rsc)
1370 577 : os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1371 :
1372 1173 : if (kde && !encr) {
1373 349 : os_memcpy(key + 1, kde, kde_len);
1374 349 : WPA_PUT_BE16(key->key_data_length, kde_len);
1375 824 : } else if (encr && kde) {
1376 579 : buf = os_zalloc(key_data_len);
1377 579 : if (buf == NULL) {
1378 0 : os_free(hdr);
1379 0 : return;
1380 : }
1381 579 : pos = buf;
1382 579 : os_memcpy(pos, kde, kde_len);
1383 579 : pos += kde_len;
1384 :
1385 579 : if (pad_len)
1386 548 : *pos++ = 0xdd;
1387 :
1388 579 : wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1389 : buf, key_data_len);
1390 638 : if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1391 116 : sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1392 : version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1393 1120 : if (aes_wrap(sm->PTK.kek, 16,
1394 560 : (key_data_len - 8) / 8, buf,
1395 : (u8 *) (key + 1))) {
1396 0 : os_free(hdr);
1397 0 : os_free(buf);
1398 0 : return;
1399 : }
1400 560 : WPA_PUT_BE16(key->key_data_length, key_data_len);
1401 : } else {
1402 : u8 ek[32];
1403 19 : os_memcpy(key->key_iv,
1404 : sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1405 19 : inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1406 19 : os_memcpy(ek, key->key_iv, 16);
1407 19 : os_memcpy(ek + 16, sm->PTK.kek, 16);
1408 19 : os_memcpy(key + 1, buf, key_data_len);
1409 19 : rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1410 19 : WPA_PUT_BE16(key->key_data_length, key_data_len);
1411 : }
1412 579 : os_free(buf);
1413 : }
1414 :
1415 1173 : if (key_info & WPA_KEY_INFO_MIC) {
1416 602 : if (!sm->PTK_valid) {
1417 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1418 : "PTK not valid when sending EAPOL-Key "
1419 : "frame");
1420 0 : os_free(hdr);
1421 0 : return;
1422 : }
1423 602 : wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1424 602 : key->key_mic);
1425 : #ifdef CONFIG_TESTING_OPTIONS
1426 638 : if (!pairwise &&
1427 36 : wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
1428 0 : drand48() <
1429 0 : wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1430 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1431 : "Corrupting group EAPOL-Key Key MIC");
1432 0 : key->key_mic[0]++;
1433 : }
1434 : #endif /* CONFIG_TESTING_OPTIONS */
1435 : }
1436 :
1437 1173 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1438 : 1);
1439 1173 : wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1440 1173 : sm->pairwise_set);
1441 1173 : os_free(hdr);
1442 : }
1443 :
1444 :
1445 1165 : static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1446 : struct wpa_state_machine *sm, int key_info,
1447 : const u8 *key_rsc, const u8 *nonce,
1448 : const u8 *kde, size_t kde_len,
1449 : int keyidx, int encr)
1450 : {
1451 : int timeout_ms;
1452 1165 : int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1453 : int ctr;
1454 :
1455 1165 : if (sm == NULL)
1456 1165 : return;
1457 :
1458 1165 : __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1459 : keyidx, encr, 0);
1460 :
1461 1165 : ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1462 1165 : if (ctr == 1 && wpa_auth->conf.tx_status)
1463 1147 : timeout_ms = pairwise ? eapol_key_timeout_first :
1464 : eapol_key_timeout_first_group;
1465 : else
1466 18 : timeout_ms = eapol_key_timeout_subseq;
1467 1165 : if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1468 561 : sm->pending_1_of_4_timeout = 1;
1469 1165 : wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1470 : "counter %d)", timeout_ms, ctr);
1471 1165 : eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1472 : wpa_send_eapol_timeout, wpa_auth, sm);
1473 : }
1474 :
1475 :
1476 1173 : static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1477 : {
1478 : struct ieee802_1x_hdr *hdr;
1479 : struct wpa_eapol_key *key;
1480 : u16 key_info;
1481 1173 : int ret = 0;
1482 : u8 mic[16];
1483 :
1484 1173 : if (data_len < sizeof(*hdr) + sizeof(*key))
1485 0 : return -1;
1486 :
1487 1173 : hdr = (struct ieee802_1x_hdr *) data;
1488 1173 : key = (struct wpa_eapol_key *) (hdr + 1);
1489 1173 : key_info = WPA_GET_BE16(key->key_info);
1490 1173 : os_memcpy(mic, key->key_mic, 16);
1491 1173 : os_memset(key->key_mic, 0, 16);
1492 1173 : if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1493 2346 : data, data_len, key->key_mic) ||
1494 1173 : os_memcmp_const(mic, key->key_mic, 16) != 0)
1495 4 : ret = -1;
1496 1173 : os_memcpy(key->key_mic, mic, 16);
1497 1173 : return ret;
1498 : }
1499 :
1500 :
1501 4757 : void wpa_remove_ptk(struct wpa_state_machine *sm)
1502 : {
1503 4757 : sm->PTK_valid = FALSE;
1504 4757 : os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1505 4757 : wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
1506 4757 : sm->pairwise_set = FALSE;
1507 4757 : eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1508 4757 : }
1509 :
1510 :
1511 3581 : int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1512 : {
1513 3581 : int remove_ptk = 1;
1514 :
1515 3581 : if (sm == NULL)
1516 1681 : return -1;
1517 :
1518 1900 : wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1519 : "event %d notification", event);
1520 :
1521 1900 : switch (event) {
1522 : case WPA_AUTH:
1523 : case WPA_ASSOC:
1524 851 : break;
1525 : case WPA_DEAUTH:
1526 : case WPA_DISASSOC:
1527 766 : sm->DeauthenticationRequest = TRUE;
1528 766 : break;
1529 : case WPA_REAUTH:
1530 : case WPA_REAUTH_EAPOL:
1531 62 : if (!sm->started) {
1532 : /*
1533 : * When using WPS, we may end up here if the STA
1534 : * manages to re-associate without the previous STA
1535 : * entry getting removed. Consequently, we need to make
1536 : * sure that the WPA state machines gets initialized
1537 : * properly at this point.
1538 : */
1539 0 : wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1540 : "started - initialize now");
1541 0 : sm->started = 1;
1542 0 : sm->Init = TRUE;
1543 0 : if (wpa_sm_step(sm) == 1)
1544 0 : return 1; /* should not really happen */
1545 0 : sm->Init = FALSE;
1546 0 : sm->AuthenticationRequest = TRUE;
1547 0 : break;
1548 : }
1549 62 : if (sm->GUpdateStationKeys) {
1550 : /*
1551 : * Reauthentication cancels the pending group key
1552 : * update for this STA.
1553 : */
1554 0 : sm->group->GKeyDoneStations--;
1555 0 : sm->GUpdateStationKeys = FALSE;
1556 0 : sm->PtkGroupInit = TRUE;
1557 : }
1558 62 : sm->ReAuthenticationRequest = TRUE;
1559 62 : break;
1560 : case WPA_ASSOC_FT:
1561 : #ifdef CONFIG_IEEE80211R
1562 221 : wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1563 : "after association");
1564 221 : wpa_ft_install_ptk(sm);
1565 :
1566 : /* Using FT protocol, not WPA auth state machine */
1567 221 : sm->ft_completed = 1;
1568 221 : return 0;
1569 : #else /* CONFIG_IEEE80211R */
1570 : break;
1571 : #endif /* CONFIG_IEEE80211R */
1572 : }
1573 :
1574 : #ifdef CONFIG_IEEE80211R
1575 1679 : sm->ft_completed = 0;
1576 : #endif /* CONFIG_IEEE80211R */
1577 :
1578 : #ifdef CONFIG_IEEE80211W
1579 1679 : if (sm->mgmt_frame_prot && event == WPA_AUTH)
1580 2 : remove_ptk = 0;
1581 : #endif /* CONFIG_IEEE80211W */
1582 :
1583 1679 : if (remove_ptk) {
1584 1677 : sm->PTK_valid = FALSE;
1585 1677 : os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1586 :
1587 1677 : if (event != WPA_REAUTH_EAPOL)
1588 1619 : wpa_remove_ptk(sm);
1589 : }
1590 :
1591 1679 : return wpa_sm_step(sm);
1592 : }
1593 :
1594 :
1595 1517 : SM_STATE(WPA_PTK, INITIALIZE)
1596 : {
1597 1517 : SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1598 1517 : if (sm->Init) {
1599 : /* Init flag is not cleared here, so avoid busy
1600 : * loop by claiming nothing changed. */
1601 751 : sm->changed = FALSE;
1602 : }
1603 :
1604 1517 : sm->keycount = 0;
1605 1517 : if (sm->GUpdateStationKeys)
1606 0 : sm->group->GKeyDoneStations--;
1607 1517 : sm->GUpdateStationKeys = FALSE;
1608 1517 : if (sm->wpa == WPA_VERSION_WPA)
1609 24 : sm->PInitAKeys = FALSE;
1610 : if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1611 : * Local AA > Remote AA)) */) {
1612 1517 : sm->Pair = TRUE;
1613 : }
1614 1517 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1615 1517 : wpa_remove_ptk(sm);
1616 1517 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1617 1517 : sm->TimeoutCtr = 0;
1618 1517 : if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1619 443 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1620 : WPA_EAPOL_authorized, 0);
1621 : }
1622 1517 : }
1623 :
1624 :
1625 3 : SM_STATE(WPA_PTK, DISCONNECT)
1626 : {
1627 3 : SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1628 3 : sm->Disconnect = FALSE;
1629 3 : wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1630 3 : }
1631 :
1632 :
1633 766 : SM_STATE(WPA_PTK, DISCONNECTED)
1634 : {
1635 766 : SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1636 766 : sm->DeauthenticationRequest = FALSE;
1637 766 : }
1638 :
1639 :
1640 751 : SM_STATE(WPA_PTK, AUTHENTICATION)
1641 : {
1642 751 : SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1643 751 : os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1644 751 : sm->PTK_valid = FALSE;
1645 751 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1646 : 1);
1647 751 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1648 751 : sm->AuthenticationRequest = FALSE;
1649 751 : }
1650 :
1651 :
1652 859 : static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1653 : struct wpa_group *group)
1654 : {
1655 859 : if (group->first_sta_seen)
1656 1357 : return;
1657 : /*
1658 : * System has run bit further than at the time hostapd was started
1659 : * potentially very early during boot up. This provides better chances
1660 : * of collecting more randomness on embedded systems. Re-initialize the
1661 : * GMK and Counter here to improve their strength if there was not
1662 : * enough entropy available immediately after system startup.
1663 : */
1664 361 : wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1665 : "station");
1666 : if (random_pool_ready() != 1) {
1667 : wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1668 : "to proceed - reject first 4-way handshake");
1669 : group->reject_4way_hs_for_entropy = TRUE;
1670 : } else {
1671 361 : group->first_sta_seen = TRUE;
1672 361 : group->reject_4way_hs_for_entropy = FALSE;
1673 : }
1674 :
1675 361 : wpa_group_init_gmk_and_counter(wpa_auth, group);
1676 361 : wpa_gtk_update(wpa_auth, group);
1677 361 : wpa_group_config_group_keys(wpa_auth, group);
1678 : }
1679 :
1680 :
1681 859 : SM_STATE(WPA_PTK, AUTHENTICATION2)
1682 : {
1683 859 : SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1684 :
1685 859 : wpa_group_ensure_init(sm->wpa_auth, sm->group);
1686 859 : sm->ReAuthenticationRequest = FALSE;
1687 :
1688 : /*
1689 : * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1690 : * ambiguous. The Authenticator state machine uses a counter that is
1691 : * incremented by one for each 4-way handshake. However, the security
1692 : * analysis of 4-way handshake points out that unpredictable nonces
1693 : * help in preventing precomputation attacks. Instead of the state
1694 : * machine definition, use an unpredictable nonce value here to provide
1695 : * stronger protection against potential precomputation attacks.
1696 : */
1697 859 : if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1698 0 : wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1699 : "ANonce.");
1700 0 : sm->Disconnect = TRUE;
1701 859 : return;
1702 : }
1703 859 : wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1704 : WPA_NONCE_LEN);
1705 : /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1706 : * logical place than INITIALIZE since AUTHENTICATION2 can be
1707 : * re-entered on ReAuthenticationRequest without going through
1708 : * INITIALIZE. */
1709 859 : sm->TimeoutCtr = 0;
1710 : }
1711 :
1712 :
1713 332 : SM_STATE(WPA_PTK, INITPMK)
1714 : {
1715 : u8 msk[2 * PMK_LEN];
1716 332 : size_t len = 2 * PMK_LEN;
1717 :
1718 332 : SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1719 : #ifdef CONFIG_IEEE80211R
1720 332 : sm->xxkey_len = 0;
1721 : #endif /* CONFIG_IEEE80211R */
1722 332 : if (sm->pmksa) {
1723 24 : wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1724 24 : os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1725 308 : } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1726 306 : wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1727 : "(len=%lu)", (unsigned long) len);
1728 306 : os_memcpy(sm->PMK, msk, PMK_LEN);
1729 : #ifdef CONFIG_IEEE80211R
1730 306 : if (len >= 2 * PMK_LEN) {
1731 306 : os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1732 306 : sm->xxkey_len = PMK_LEN;
1733 : }
1734 : #endif /* CONFIG_IEEE80211R */
1735 : } else {
1736 2 : wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1737 : }
1738 :
1739 332 : sm->req_replay_counter_used = 0;
1740 : /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1741 : * will break reauthentication since EAPOL state machines may not be
1742 : * get into AUTHENTICATING state that clears keyRun before WPA state
1743 : * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1744 : * state and takes PMK from the previously used AAA Key. This will
1745 : * eventually fail in 4-Way Handshake because Supplicant uses PMK
1746 : * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1747 : * be good workaround for this issue. */
1748 332 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1749 332 : }
1750 :
1751 :
1752 231 : SM_STATE(WPA_PTK, INITPSK)
1753 : {
1754 : const u8 *psk;
1755 231 : SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1756 231 : psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
1757 231 : if (psk) {
1758 231 : os_memcpy(sm->PMK, psk, PMK_LEN);
1759 : #ifdef CONFIG_IEEE80211R
1760 231 : os_memcpy(sm->xxkey, psk, PMK_LEN);
1761 231 : sm->xxkey_len = PMK_LEN;
1762 : #endif /* CONFIG_IEEE80211R */
1763 : }
1764 231 : sm->req_replay_counter_used = 0;
1765 231 : }
1766 :
1767 :
1768 572 : SM_STATE(WPA_PTK, PTKSTART)
1769 : {
1770 572 : u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1771 572 : size_t pmkid_len = 0;
1772 :
1773 572 : SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1774 572 : sm->PTKRequest = FALSE;
1775 572 : sm->TimeoutEvt = FALSE;
1776 :
1777 572 : sm->TimeoutCtr++;
1778 572 : if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1779 : /* No point in sending the EAPOL-Key - we will disconnect
1780 : * immediately following this. */
1781 573 : return;
1782 : }
1783 :
1784 571 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1785 : "sending 1/4 msg of 4-Way Handshake");
1786 : /*
1787 : * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1788 : * one possible PSK for this STA.
1789 : */
1790 1125 : if (sm->wpa == WPA_VERSION_WPA2 &&
1791 882 : wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1792 328 : sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
1793 326 : pmkid = buf;
1794 326 : pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1795 326 : pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1796 326 : pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1797 326 : RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1798 326 : if (sm->pmksa)
1799 24 : os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1800 : sm->pmksa->pmkid, PMKID_LEN);
1801 : else {
1802 : /*
1803 : * Calculate PMKID since no PMKSA cache entry was
1804 : * available with pre-calculated PMKID.
1805 : */
1806 604 : rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1807 302 : sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1808 : wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1809 : }
1810 : }
1811 571 : wpa_send_eapol(sm->wpa_auth, sm,
1812 : WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1813 571 : sm->ANonce, pmkid, pmkid_len, 0, 0);
1814 : }
1815 :
1816 :
1817 570 : static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1818 : struct wpa_ptk *ptk)
1819 : {
1820 570 : size_t ptk_len = wpa_cipher_key_len(sm->pairwise) + 32;
1821 : #ifdef CONFIG_IEEE80211R
1822 570 : if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1823 19 : return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
1824 : #endif /* CONFIG_IEEE80211R */
1825 :
1826 1102 : wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1827 551 : sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1828 : (u8 *) ptk, ptk_len,
1829 : wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1830 :
1831 551 : return 0;
1832 : }
1833 :
1834 :
1835 570 : SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1836 : {
1837 : struct wpa_ptk PTK;
1838 570 : int ok = 0;
1839 570 : const u8 *pmk = NULL;
1840 :
1841 570 : SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1842 570 : sm->EAPOLKeyReceived = FALSE;
1843 570 : sm->update_snonce = FALSE;
1844 :
1845 : /* WPA with IEEE 802.1X: use the derived PMK from EAP
1846 : * WPA-PSK: iterate through possible PSKs and select the one matching
1847 : * the packet */
1848 : for (;;) {
1849 574 : if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1850 245 : pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
1851 245 : sm->p2p_dev_addr, pmk);
1852 245 : if (pmk == NULL)
1853 4 : break;
1854 : } else
1855 329 : pmk = sm->PMK;
1856 :
1857 570 : wpa_derive_ptk(sm, pmk, &PTK);
1858 :
1859 570 : if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1860 : sm->last_rx_eapol_key_len) == 0) {
1861 566 : ok = 1;
1862 566 : break;
1863 : }
1864 :
1865 4 : if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1866 0 : break;
1867 4 : }
1868 :
1869 570 : if (!ok) {
1870 4 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1871 : "invalid MIC in msg 2/4 of 4-Way Handshake");
1872 4 : return;
1873 : }
1874 :
1875 : #ifdef CONFIG_IEEE80211R
1876 566 : if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
1877 : /*
1878 : * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
1879 : * with the value we derived.
1880 : */
1881 19 : if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
1882 : WPA_PMK_NAME_LEN) != 0) {
1883 0 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1884 : "PMKR1Name mismatch in FT 4-way "
1885 : "handshake");
1886 0 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
1887 : "Supplicant",
1888 0 : sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
1889 0 : wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
1890 0 : sm->pmk_r1_name, WPA_PMK_NAME_LEN);
1891 0 : return;
1892 : }
1893 : }
1894 : #endif /* CONFIG_IEEE80211R */
1895 :
1896 566 : sm->pending_1_of_4_timeout = 0;
1897 566 : eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1898 :
1899 566 : if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1900 : /* PSK may have changed from the previous choice, so update
1901 : * state machine data based on whatever PSK was selected here.
1902 : */
1903 237 : os_memcpy(sm->PMK, pmk, PMK_LEN);
1904 : }
1905 :
1906 566 : sm->MICVerified = TRUE;
1907 :
1908 566 : os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1909 566 : sm->PTK_valid = TRUE;
1910 : }
1911 :
1912 :
1913 566 : SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1914 : {
1915 566 : SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1916 566 : sm->TimeoutCtr = 0;
1917 566 : }
1918 :
1919 :
1920 : #ifdef CONFIG_IEEE80211W
1921 :
1922 576 : static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1923 : {
1924 576 : if (sm->mgmt_frame_prot) {
1925 : size_t len;
1926 29 : len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
1927 29 : return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
1928 : }
1929 :
1930 547 : return 0;
1931 : }
1932 :
1933 :
1934 576 : static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1935 : {
1936 : struct wpa_igtk_kde igtk;
1937 576 : struct wpa_group *gsm = sm->group;
1938 : u8 rsc[WPA_KEY_RSC_LEN];
1939 576 : size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
1940 :
1941 576 : if (!sm->mgmt_frame_prot)
1942 547 : return pos;
1943 :
1944 29 : igtk.keyid[0] = gsm->GN_igtk;
1945 29 : igtk.keyid[1] = 0;
1946 58 : if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
1947 29 : wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
1948 0 : os_memset(igtk.pn, 0, sizeof(igtk.pn));
1949 : else
1950 29 : os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
1951 29 : os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
1952 29 : if (sm->wpa_auth->conf.disable_gtk) {
1953 : /*
1954 : * Provide unique random IGTK to each STA to prevent use of
1955 : * IGTK in the BSS.
1956 : */
1957 2 : if (random_get_bytes(igtk.igtk, len) < 0)
1958 0 : return pos;
1959 : }
1960 29 : pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1961 : (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
1962 : NULL, 0);
1963 :
1964 29 : return pos;
1965 : }
1966 :
1967 : #else /* CONFIG_IEEE80211W */
1968 :
1969 : static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1970 : {
1971 : return 0;
1972 : }
1973 :
1974 :
1975 : static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1976 : {
1977 : return pos;
1978 : }
1979 :
1980 : #endif /* CONFIG_IEEE80211W */
1981 :
1982 :
1983 566 : SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1984 : {
1985 : u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
1986 : size_t gtk_len, kde_len;
1987 566 : struct wpa_group *gsm = sm->group;
1988 : u8 *wpa_ie;
1989 566 : int wpa_ie_len, secure, keyidx, encr = 0;
1990 :
1991 566 : SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1992 566 : sm->TimeoutEvt = FALSE;
1993 :
1994 566 : sm->TimeoutCtr++;
1995 566 : if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1996 : /* No point in sending the EAPOL-Key - we will disconnect
1997 : * immediately following this. */
1998 0 : return;
1999 : }
2000 :
2001 : /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2002 : GTK[GN], IGTK, [FTIE], [TIE * 2])
2003 : */
2004 566 : os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2005 566 : wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2006 : /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
2007 566 : wpa_ie = sm->wpa_auth->wpa_ie;
2008 566 : wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2009 583 : if (sm->wpa == WPA_VERSION_WPA &&
2010 20 : (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2011 6 : wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
2012 : /* WPA-only STA, remove RSN IE */
2013 3 : wpa_ie = wpa_ie + wpa_ie[1] + 2;
2014 3 : wpa_ie_len = wpa_ie[1] + 2;
2015 : }
2016 566 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2017 : "sending 3/4 msg of 4-Way Handshake");
2018 566 : if (sm->wpa == WPA_VERSION_WPA2) {
2019 : /* WPA2 send GTK in the 4-way handshake */
2020 549 : secure = 1;
2021 549 : gtk = gsm->GTK[gsm->GN - 1];
2022 549 : gtk_len = gsm->GTK_len;
2023 549 : if (sm->wpa_auth->conf.disable_gtk) {
2024 : /*
2025 : * Provide unique random GTK to each STA to prevent use
2026 : * of GTK in the BSS.
2027 : */
2028 8 : if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2029 0 : return;
2030 8 : gtk = dummy_gtk;
2031 : }
2032 549 : keyidx = gsm->GN;
2033 549 : _rsc = rsc;
2034 549 : encr = 1;
2035 : } else {
2036 : /* WPA does not include GTK in msg 3/4 */
2037 17 : secure = 0;
2038 17 : gtk = NULL;
2039 17 : gtk_len = 0;
2040 17 : keyidx = 0;
2041 17 : _rsc = NULL;
2042 17 : if (sm->rx_eapol_key_secure) {
2043 : /*
2044 : * It looks like Windows 7 supplicant tries to use
2045 : * Secure bit in msg 2/4 after having reported Michael
2046 : * MIC failure and it then rejects the 4-way handshake
2047 : * if msg 3/4 does not set Secure bit. Work around this
2048 : * by setting the Secure bit here even in the case of
2049 : * WPA if the supplicant used it first.
2050 : */
2051 0 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2052 : "STA used Secure bit in WPA msg 2/4 - "
2053 : "set Secure for 3/4 as workaround");
2054 0 : secure = 1;
2055 : }
2056 : }
2057 :
2058 566 : kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2059 566 : if (gtk)
2060 549 : kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
2061 : #ifdef CONFIG_IEEE80211R
2062 566 : if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2063 19 : kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2064 19 : kde_len += 300; /* FTIE + 2 * TIE */
2065 : }
2066 : #endif /* CONFIG_IEEE80211R */
2067 : #ifdef CONFIG_P2P
2068 : if (WPA_GET_BE32(sm->ip_addr) > 0)
2069 : kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2070 : #endif /* CONFIG_P2P */
2071 566 : kde = os_malloc(kde_len);
2072 566 : if (kde == NULL)
2073 0 : return;
2074 :
2075 566 : pos = kde;
2076 566 : os_memcpy(pos, wpa_ie, wpa_ie_len);
2077 566 : pos += wpa_ie_len;
2078 : #ifdef CONFIG_IEEE80211R
2079 566 : if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2080 19 : int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
2081 19 : if (res < 0) {
2082 0 : wpa_printf(MSG_ERROR, "FT: Failed to insert "
2083 : "PMKR1Name into RSN IE in EAPOL-Key data");
2084 0 : os_free(kde);
2085 0 : return;
2086 : }
2087 19 : pos += res;
2088 : }
2089 : #endif /* CONFIG_IEEE80211R */
2090 566 : if (gtk) {
2091 : u8 hdr[2];
2092 549 : hdr[0] = keyidx & 0x03;
2093 549 : hdr[1] = 0;
2094 549 : pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2095 : gtk, gtk_len);
2096 : }
2097 566 : pos = ieee80211w_kde_add(sm, pos);
2098 :
2099 : #ifdef CONFIG_IEEE80211R
2100 566 : if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2101 : int res;
2102 : struct wpa_auth_config *conf;
2103 :
2104 19 : conf = &sm->wpa_auth->conf;
2105 19 : res = wpa_write_ftie(conf, conf->r0_key_holder,
2106 : conf->r0_key_holder_len,
2107 19 : NULL, NULL, pos, kde + kde_len - pos,
2108 : NULL, 0);
2109 19 : if (res < 0) {
2110 0 : wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2111 : "into EAPOL-Key Key Data");
2112 0 : os_free(kde);
2113 0 : return;
2114 : }
2115 19 : pos += res;
2116 :
2117 : /* TIE[ReassociationDeadline] (TU) */
2118 19 : *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2119 19 : *pos++ = 5;
2120 19 : *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2121 19 : WPA_PUT_LE32(pos, conf->reassociation_deadline);
2122 19 : pos += 4;
2123 :
2124 : /* TIE[KeyLifetime] (seconds) */
2125 19 : *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2126 19 : *pos++ = 5;
2127 19 : *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2128 19 : WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2129 19 : pos += 4;
2130 : }
2131 : #endif /* CONFIG_IEEE80211R */
2132 : #ifdef CONFIG_P2P
2133 : if (WPA_GET_BE32(sm->ip_addr) > 0) {
2134 : u8 addr[3 * 4];
2135 : os_memcpy(addr, sm->ip_addr, 4);
2136 : os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2137 : os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2138 : pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2139 : addr, sizeof(addr), NULL, 0);
2140 : }
2141 : #endif /* CONFIG_P2P */
2142 :
2143 1132 : wpa_send_eapol(sm->wpa_auth, sm,
2144 : (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
2145 : WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2146 : WPA_KEY_INFO_KEY_TYPE,
2147 1132 : _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2148 566 : os_free(kde);
2149 : }
2150 :
2151 :
2152 565 : SM_STATE(WPA_PTK, PTKINITDONE)
2153 : {
2154 565 : SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2155 565 : sm->EAPOLKeyReceived = FALSE;
2156 565 : if (sm->Pair) {
2157 565 : enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2158 565 : int klen = wpa_cipher_key_len(sm->pairwise);
2159 1130 : if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2160 565 : sm->PTK.tk1, klen)) {
2161 0 : wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2162 565 : return;
2163 : }
2164 : /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2165 565 : sm->pairwise_set = TRUE;
2166 :
2167 565 : if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2168 6 : eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2169 6 : eloop_register_timeout(sm->wpa_auth->conf.
2170 : wpa_ptk_rekey, 0, wpa_rekey_ptk,
2171 6 : sm->wpa_auth, sm);
2172 : }
2173 :
2174 565 : if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2175 237 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2176 : WPA_EAPOL_authorized, 1);
2177 : }
2178 : }
2179 :
2180 : if (0 /* IBSS == TRUE */) {
2181 : sm->keycount++;
2182 : if (sm->keycount == 2) {
2183 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2184 : WPA_EAPOL_portValid, 1);
2185 : }
2186 : } else {
2187 565 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2188 : 1);
2189 : }
2190 565 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2191 565 : wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2192 565 : if (sm->wpa == WPA_VERSION_WPA)
2193 17 : sm->PInitAKeys = TRUE;
2194 : else
2195 548 : sm->has_GTK = TRUE;
2196 565 : wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2197 : "pairwise key handshake completed (%s)",
2198 565 : sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2199 :
2200 : #ifdef CONFIG_IEEE80211R
2201 565 : wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2202 : #endif /* CONFIG_IEEE80211R */
2203 : }
2204 :
2205 :
2206 19032 : SM_STEP(WPA_PTK)
2207 : {
2208 19032 : struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2209 :
2210 19032 : if (sm->Init)
2211 751 : SM_ENTER(WPA_PTK, INITIALIZE);
2212 18281 : else if (sm->Disconnect
2213 : /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2214 0 : wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2215 : "WPA_PTK: sm->Disconnect");
2216 0 : SM_ENTER(WPA_PTK, DISCONNECT);
2217 : }
2218 18281 : else if (sm->DeauthenticationRequest)
2219 766 : SM_ENTER(WPA_PTK, DISCONNECTED);
2220 17515 : else if (sm->AuthenticationRequest)
2221 751 : SM_ENTER(WPA_PTK, AUTHENTICATION);
2222 16764 : else if (sm->ReAuthenticationRequest)
2223 108 : SM_ENTER(WPA_PTK, AUTHENTICATION2);
2224 16656 : else if (sm->PTKRequest)
2225 7 : SM_ENTER(WPA_PTK, PTKSTART);
2226 16649 : else switch (sm->wpa_ptk_state) {
2227 : case WPA_PTK_INITIALIZE:
2228 1888 : break;
2229 : case WPA_PTK_DISCONNECT:
2230 0 : SM_ENTER(WPA_PTK, DISCONNECTED);
2231 0 : break;
2232 : case WPA_PTK_DISCONNECTED:
2233 766 : SM_ENTER(WPA_PTK, INITIALIZE);
2234 766 : break;
2235 : case WPA_PTK_AUTHENTICATION:
2236 751 : SM_ENTER(WPA_PTK, AUTHENTICATION2);
2237 751 : break;
2238 : case WPA_PTK_AUTHENTICATION2:
2239 15905 : if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
2240 7837 : wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2241 : WPA_EAPOL_keyRun) > 0)
2242 332 : SM_ENTER(WPA_PTK, INITPMK);
2243 7736 : else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
2244 : /* FIX: && 802.1X::keyRun */)
2245 231 : SM_ENTER(WPA_PTK, INITPSK);
2246 8068 : break;
2247 : case WPA_PTK_INITPMK:
2248 332 : if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2249 : WPA_EAPOL_keyAvailable) > 0)
2250 330 : SM_ENTER(WPA_PTK, PTKSTART);
2251 : else {
2252 2 : wpa_auth->dot11RSNA4WayHandshakeFailures++;
2253 2 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2254 : "INITPMK - keyAvailable = false");
2255 2 : SM_ENTER(WPA_PTK, DISCONNECT);
2256 : }
2257 332 : break;
2258 : case WPA_PTK_INITPSK:
2259 231 : if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2260 : NULL))
2261 231 : SM_ENTER(WPA_PTK, PTKSTART);
2262 : else {
2263 0 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2264 : "no PSK configured for the STA");
2265 0 : wpa_auth->dot11RSNA4WayHandshakeFailures++;
2266 0 : SM_ENTER(WPA_PTK, DISCONNECT);
2267 : }
2268 231 : break;
2269 : case WPA_PTK_PTKSTART:
2270 1770 : if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2271 570 : sm->EAPOLKeyPairwise)
2272 570 : SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2273 1260 : else if (sm->TimeoutCtr >
2274 630 : (int) dot11RSNAConfigPairwiseUpdateCount) {
2275 1 : wpa_auth->dot11RSNA4WayHandshakeFailures++;
2276 1 : wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2277 : "PTKSTART: Retry limit %d reached",
2278 : dot11RSNAConfigPairwiseUpdateCount);
2279 1 : SM_ENTER(WPA_PTK, DISCONNECT);
2280 629 : } else if (sm->TimeoutEvt)
2281 0 : SM_ENTER(WPA_PTK, PTKSTART);
2282 1200 : break;
2283 : case WPA_PTK_PTKCALCNEGOTIATING:
2284 574 : if (sm->MICVerified)
2285 566 : SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2286 8 : else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2287 0 : sm->EAPOLKeyPairwise)
2288 0 : SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2289 8 : else if (sm->TimeoutEvt)
2290 4 : SM_ENTER(WPA_PTK, PTKSTART);
2291 574 : break;
2292 : case WPA_PTK_PTKCALCNEGOTIATING2:
2293 566 : SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2294 566 : break;
2295 : case WPA_PTK_PTKINITNEGOTIATING:
2296 1131 : if (sm->update_snonce)
2297 0 : SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2298 1696 : else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2299 1130 : sm->EAPOLKeyPairwise && sm->MICVerified)
2300 565 : SM_ENTER(WPA_PTK, PTKINITDONE);
2301 1132 : else if (sm->TimeoutCtr >
2302 566 : (int) dot11RSNAConfigPairwiseUpdateCount) {
2303 0 : wpa_auth->dot11RSNA4WayHandshakeFailures++;
2304 0 : wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2305 : "PTKINITNEGOTIATING: Retry limit %d "
2306 : "reached",
2307 : dot11RSNAConfigPairwiseUpdateCount);
2308 0 : SM_ENTER(WPA_PTK, DISCONNECT);
2309 566 : } else if (sm->TimeoutEvt)
2310 0 : SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2311 1131 : break;
2312 : case WPA_PTK_PTKINITDONE:
2313 1142 : break;
2314 : }
2315 19032 : }
2316 :
2317 :
2318 777 : SM_STATE(WPA_PTK_GROUP, IDLE)
2319 : {
2320 777 : SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2321 777 : if (sm->Init) {
2322 : /* Init flag is not cleared here, so avoid busy
2323 : * loop by claiming nothing changed. */
2324 751 : sm->changed = FALSE;
2325 : }
2326 777 : sm->GTimeoutCtr = 0;
2327 777 : }
2328 :
2329 :
2330 28 : SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2331 : {
2332 : u8 rsc[WPA_KEY_RSC_LEN];
2333 28 : struct wpa_group *gsm = sm->group;
2334 : u8 *kde, *pos, hdr[2];
2335 : size_t kde_len;
2336 : u8 *gtk, dummy_gtk[32];
2337 :
2338 28 : SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
2339 :
2340 28 : sm->GTimeoutCtr++;
2341 28 : if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2342 : /* No point in sending the EAPOL-Key - we will disconnect
2343 : * immediately following this. */
2344 0 : return;
2345 : }
2346 :
2347 28 : if (sm->wpa == WPA_VERSION_WPA)
2348 18 : sm->PInitAKeys = FALSE;
2349 28 : sm->TimeoutEvt = FALSE;
2350 : /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2351 28 : os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2352 28 : if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2353 18 : wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2354 28 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2355 : "sending 1/2 msg of Group Key Handshake");
2356 :
2357 28 : gtk = gsm->GTK[gsm->GN - 1];
2358 28 : if (sm->wpa_auth->conf.disable_gtk) {
2359 : /*
2360 : * Provide unique random GTK to each STA to prevent use
2361 : * of GTK in the BSS.
2362 : */
2363 0 : if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
2364 0 : return;
2365 0 : gtk = dummy_gtk;
2366 : }
2367 28 : if (sm->wpa == WPA_VERSION_WPA2) {
2368 20 : kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2369 10 : ieee80211w_kde_len(sm);
2370 10 : kde = os_malloc(kde_len);
2371 10 : if (kde == NULL)
2372 0 : return;
2373 :
2374 10 : pos = kde;
2375 10 : hdr[0] = gsm->GN & 0x03;
2376 10 : hdr[1] = 0;
2377 10 : pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2378 10 : gtk, gsm->GTK_len);
2379 10 : pos = ieee80211w_kde_add(sm, pos);
2380 : } else {
2381 18 : kde = gtk;
2382 18 : pos = kde + gsm->GTK_len;
2383 : }
2384 :
2385 84 : wpa_send_eapol(sm->wpa_auth, sm,
2386 : WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2387 : WPA_KEY_INFO_ACK |
2388 28 : (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2389 56 : rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
2390 28 : if (sm->wpa == WPA_VERSION_WPA2)
2391 10 : os_free(kde);
2392 : }
2393 :
2394 :
2395 26 : SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2396 : {
2397 26 : SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2398 26 : sm->EAPOLKeyReceived = FALSE;
2399 26 : if (sm->GUpdateStationKeys)
2400 9 : sm->group->GKeyDoneStations--;
2401 26 : sm->GUpdateStationKeys = FALSE;
2402 26 : sm->GTimeoutCtr = 0;
2403 : /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2404 26 : wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2405 : "group key handshake completed (%s)",
2406 26 : sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2407 26 : sm->has_GTK = TRUE;
2408 26 : }
2409 :
2410 :
2411 0 : SM_STATE(WPA_PTK_GROUP, KEYERROR)
2412 : {
2413 0 : SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2414 0 : if (sm->GUpdateStationKeys)
2415 0 : sm->group->GKeyDoneStations--;
2416 0 : sm->GUpdateStationKeys = FALSE;
2417 0 : sm->Disconnect = TRUE;
2418 0 : }
2419 :
2420 :
2421 19032 : SM_STEP(WPA_PTK_GROUP)
2422 : {
2423 19032 : if (sm->Init || sm->PtkGroupInit) {
2424 751 : SM_ENTER(WPA_PTK_GROUP, IDLE);
2425 751 : sm->PtkGroupInit = FALSE;
2426 18281 : } else switch (sm->wpa_ptk_group_state) {
2427 : case WPA_PTK_GROUP_IDLE:
2428 36386 : if (sm->GUpdateStationKeys ||
2429 18458 : (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2430 27 : SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2431 18198 : break;
2432 : case WPA_PTK_GROUP_REKEYNEGOTIATING:
2433 83 : if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2434 52 : !sm->EAPOLKeyPairwise && sm->MICVerified)
2435 26 : SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2436 62 : else if (sm->GTimeoutCtr >
2437 31 : (int) dot11RSNAConfigGroupUpdateCount)
2438 0 : SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2439 31 : else if (sm->TimeoutEvt)
2440 1 : SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2441 57 : break;
2442 : case WPA_PTK_GROUP_KEYERROR:
2443 0 : SM_ENTER(WPA_PTK_GROUP, IDLE);
2444 0 : break;
2445 : case WPA_PTK_GROUP_REKEYESTABLISHED:
2446 26 : SM_ENTER(WPA_PTK_GROUP, IDLE);
2447 26 : break;
2448 : }
2449 19032 : }
2450 :
2451 :
2452 819 : static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2453 : struct wpa_group *group)
2454 : {
2455 819 : int ret = 0;
2456 :
2457 819 : os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2458 819 : inc_byte_array(group->Counter, WPA_NONCE_LEN);
2459 1638 : if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2460 819 : wpa_auth->addr, group->GNonce,
2461 1638 : group->GTK[group->GN - 1], group->GTK_len) < 0)
2462 0 : ret = -1;
2463 1638 : wpa_hexdump_key(MSG_DEBUG, "GTK",
2464 1638 : group->GTK[group->GN - 1], group->GTK_len);
2465 :
2466 : #ifdef CONFIG_IEEE80211W
2467 819 : if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2468 : size_t len;
2469 210 : len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2470 210 : os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2471 210 : inc_byte_array(group->Counter, WPA_NONCE_LEN);
2472 210 : if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2473 210 : wpa_auth->addr, group->GNonce,
2474 210 : group->IGTK[group->GN_igtk - 4], len) < 0)
2475 0 : ret = -1;
2476 210 : wpa_hexdump_key(MSG_DEBUG, "IGTK",
2477 210 : group->IGTK[group->GN_igtk - 4], len);
2478 : }
2479 : #endif /* CONFIG_IEEE80211W */
2480 :
2481 819 : return ret;
2482 : }
2483 :
2484 :
2485 445 : static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2486 : struct wpa_group *group)
2487 : {
2488 445 : wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2489 : "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2490 445 : group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2491 445 : group->wpa_group_state = WPA_GROUP_GTK_INIT;
2492 :
2493 : /* GTK[0..N] = 0 */
2494 445 : os_memset(group->GTK, 0, sizeof(group->GTK));
2495 445 : group->GN = 1;
2496 445 : group->GM = 2;
2497 : #ifdef CONFIG_IEEE80211W
2498 445 : group->GN_igtk = 4;
2499 445 : group->GM_igtk = 5;
2500 : #endif /* CONFIG_IEEE80211W */
2501 : /* GTK[GN] = CalcGTK() */
2502 445 : wpa_gtk_update(wpa_auth, group);
2503 445 : }
2504 :
2505 :
2506 10 : static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2507 : {
2508 10 : if (ctx != NULL && ctx != sm->group)
2509 0 : return 0;
2510 :
2511 10 : if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2512 0 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2513 : "Not in PTKINITDONE; skip Group Key update");
2514 0 : sm->GUpdateStationKeys = FALSE;
2515 0 : return 0;
2516 : }
2517 10 : if (sm->GUpdateStationKeys) {
2518 : /*
2519 : * This should not really happen, so add a debug log entry.
2520 : * Since we clear the GKeyDoneStations before the loop, the
2521 : * station needs to be counted here anyway.
2522 : */
2523 0 : wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2524 : "GUpdateStationKeys was already set when "
2525 : "marking station for GTK rekeying");
2526 : }
2527 :
2528 : /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
2529 10 : if (sm->is_wnmsleep)
2530 0 : return 0;
2531 :
2532 10 : sm->group->GKeyDoneStations++;
2533 10 : sm->GUpdateStationKeys = TRUE;
2534 :
2535 10 : wpa_sm_step(sm);
2536 10 : return 0;
2537 : }
2538 :
2539 :
2540 : #ifdef CONFIG_WNM
2541 : /* update GTK when exiting WNM-Sleep Mode */
2542 4 : void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
2543 : {
2544 4 : if (sm == NULL || sm->is_wnmsleep)
2545 7 : return;
2546 :
2547 1 : wpa_group_update_sta(sm, NULL);
2548 : }
2549 :
2550 :
2551 10 : void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
2552 : {
2553 10 : if (sm)
2554 4 : sm->is_wnmsleep = !!flag;
2555 10 : }
2556 :
2557 :
2558 1 : int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2559 : {
2560 1 : struct wpa_group *gsm = sm->group;
2561 1 : u8 *start = pos;
2562 :
2563 : /*
2564 : * GTK subelement:
2565 : * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2566 : * Key[5..32]
2567 : */
2568 1 : *pos++ = WNM_SLEEP_SUBELEM_GTK;
2569 1 : *pos++ = 11 + gsm->GTK_len;
2570 : /* Key ID in B0-B1 of Key Info */
2571 1 : WPA_PUT_LE16(pos, gsm->GN & 0x03);
2572 1 : pos += 2;
2573 1 : *pos++ = gsm->GTK_len;
2574 1 : if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
2575 0 : return 0;
2576 1 : pos += 8;
2577 1 : os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2578 1 : pos += gsm->GTK_len;
2579 :
2580 1 : wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
2581 : gsm->GN);
2582 2 : wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
2583 2 : gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2584 :
2585 1 : return pos - start;
2586 : }
2587 :
2588 :
2589 : #ifdef CONFIG_IEEE80211W
2590 1 : int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2591 : {
2592 1 : struct wpa_group *gsm = sm->group;
2593 1 : u8 *start = pos;
2594 1 : size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2595 :
2596 : /*
2597 : * IGTK subelement:
2598 : * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
2599 : */
2600 1 : *pos++ = WNM_SLEEP_SUBELEM_IGTK;
2601 1 : *pos++ = 2 + 6 + len;
2602 1 : WPA_PUT_LE16(pos, gsm->GN_igtk);
2603 1 : pos += 2;
2604 1 : if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
2605 0 : return 0;
2606 1 : pos += 6;
2607 :
2608 1 : os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
2609 1 : pos += len;
2610 :
2611 1 : wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
2612 : gsm->GN_igtk);
2613 1 : wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
2614 1 : gsm->IGTK[gsm->GN_igtk - 4], len);
2615 :
2616 1 : return pos - start;
2617 : }
2618 : #endif /* CONFIG_IEEE80211W */
2619 : #endif /* CONFIG_WNM */
2620 :
2621 :
2622 9 : static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2623 : struct wpa_group *group)
2624 : {
2625 : int tmp;
2626 :
2627 9 : wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2628 : "SETKEYS (VLAN-ID %d)", group->vlan_id);
2629 9 : group->changed = TRUE;
2630 9 : group->wpa_group_state = WPA_GROUP_SETKEYS;
2631 9 : group->GTKReKey = FALSE;
2632 9 : tmp = group->GM;
2633 9 : group->GM = group->GN;
2634 9 : group->GN = tmp;
2635 : #ifdef CONFIG_IEEE80211W
2636 9 : tmp = group->GM_igtk;
2637 9 : group->GM_igtk = group->GN_igtk;
2638 9 : group->GN_igtk = tmp;
2639 : #endif /* CONFIG_IEEE80211W */
2640 : /* "GKeyDoneStations = GNoStations" is done in more robust way by
2641 : * counting the STAs that are marked with GUpdateStationKeys instead of
2642 : * including all STAs that could be in not-yet-completed state. */
2643 9 : wpa_gtk_update(wpa_auth, group);
2644 :
2645 9 : if (group->GKeyDoneStations) {
2646 0 : wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2647 : "GKeyDoneStations=%d when starting new GTK rekey",
2648 : group->GKeyDoneStations);
2649 0 : group->GKeyDoneStations = 0;
2650 : }
2651 9 : wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
2652 9 : wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2653 : group->GKeyDoneStations);
2654 9 : }
2655 :
2656 :
2657 818 : static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2658 : struct wpa_group *group)
2659 : {
2660 818 : int ret = 0;
2661 :
2662 2454 : if (wpa_auth_set_key(wpa_auth, group->vlan_id,
2663 818 : wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
2664 : broadcast_ether_addr, group->GN,
2665 1636 : group->GTK[group->GN - 1], group->GTK_len) < 0)
2666 0 : ret = -1;
2667 :
2668 : #ifdef CONFIG_IEEE80211W
2669 818 : if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2670 : enum wpa_alg alg;
2671 : size_t len;
2672 :
2673 210 : alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
2674 210 : len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2675 :
2676 420 : if (ret == 0 &&
2677 210 : wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
2678 : broadcast_ether_addr, group->GN_igtk,
2679 210 : group->IGTK[group->GN_igtk - 4], len) < 0)
2680 0 : ret = -1;
2681 : }
2682 : #endif /* CONFIG_IEEE80211W */
2683 :
2684 818 : return ret;
2685 : }
2686 :
2687 :
2688 0 : static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
2689 : {
2690 0 : if (sm->group == ctx) {
2691 0 : wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
2692 : " for discconnection due to fatal failure",
2693 0 : MAC2STR(sm->addr));
2694 0 : sm->Disconnect = TRUE;
2695 : }
2696 :
2697 0 : return 0;
2698 : }
2699 :
2700 :
2701 0 : static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
2702 : struct wpa_group *group)
2703 : {
2704 0 : wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
2705 0 : group->changed = TRUE;
2706 0 : group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
2707 0 : wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
2708 0 : }
2709 :
2710 :
2711 453 : static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2712 : struct wpa_group *group)
2713 : {
2714 453 : wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2715 : "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2716 453 : group->changed = TRUE;
2717 453 : group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2718 :
2719 453 : if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
2720 0 : wpa_group_fatal_failure(wpa_auth, group);
2721 0 : return -1;
2722 : }
2723 :
2724 453 : return 0;
2725 : }
2726 :
2727 :
2728 19931 : static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2729 : struct wpa_group *group)
2730 : {
2731 19931 : if (group->GInit) {
2732 445 : wpa_group_gtk_init(wpa_auth, group);
2733 19486 : } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
2734 : /* Do not allow group operations */
2735 19931 : } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2736 445 : group->GTKAuthenticator) {
2737 445 : wpa_group_setkeysdone(wpa_auth, group);
2738 38054 : } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2739 19013 : group->GTKReKey) {
2740 9 : wpa_group_setkeys(wpa_auth, group);
2741 19032 : } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2742 28 : if (group->GKeyDoneStations == 0)
2743 8 : wpa_group_setkeysdone(wpa_auth, group);
2744 20 : else if (group->GTKReKey)
2745 0 : wpa_group_setkeys(wpa_auth, group);
2746 : }
2747 19931 : }
2748 :
2749 :
2750 12425 : static int wpa_sm_step(struct wpa_state_machine *sm)
2751 : {
2752 12425 : if (sm == NULL)
2753 0 : return 0;
2754 :
2755 12425 : if (sm->in_step_loop) {
2756 : /* This should not happen, but if it does, make sure we do not
2757 : * end up freeing the state machine too early by exiting the
2758 : * recursive call. */
2759 3 : wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2760 3 : return 0;
2761 : }
2762 :
2763 12422 : sm->in_step_loop = 1;
2764 : do {
2765 19032 : if (sm->pending_deinit)
2766 0 : break;
2767 :
2768 19032 : sm->changed = FALSE;
2769 19032 : sm->wpa_auth->group->changed = FALSE;
2770 :
2771 19032 : SM_STEP_RUN(WPA_PTK);
2772 19032 : if (sm->pending_deinit)
2773 0 : break;
2774 19032 : SM_STEP_RUN(WPA_PTK_GROUP);
2775 19032 : if (sm->pending_deinit)
2776 0 : break;
2777 19032 : wpa_group_sm_step(sm->wpa_auth, sm->group);
2778 19032 : } while (sm->changed || sm->wpa_auth->group->changed);
2779 12422 : sm->in_step_loop = 0;
2780 :
2781 12422 : if (sm->pending_deinit) {
2782 0 : wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2783 0 : "machine deinit for " MACSTR, MAC2STR(sm->addr));
2784 0 : wpa_free_sta_sm(sm);
2785 0 : return 1;
2786 : }
2787 12422 : return 0;
2788 : }
2789 :
2790 :
2791 8010 : static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2792 : {
2793 8010 : struct wpa_state_machine *sm = eloop_ctx;
2794 8010 : wpa_sm_step(sm);
2795 8010 : }
2796 :
2797 :
2798 8880 : void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2799 : {
2800 8880 : if (sm == NULL)
2801 9709 : return;
2802 8051 : eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2803 : }
2804 :
2805 :
2806 2 : void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2807 : {
2808 : int tmp, i;
2809 : struct wpa_group *group;
2810 :
2811 2 : if (wpa_auth == NULL)
2812 2 : return;
2813 :
2814 2 : group = wpa_auth->group;
2815 :
2816 6 : for (i = 0; i < 2; i++) {
2817 4 : tmp = group->GM;
2818 4 : group->GM = group->GN;
2819 4 : group->GN = tmp;
2820 : #ifdef CONFIG_IEEE80211W
2821 4 : tmp = group->GM_igtk;
2822 4 : group->GM_igtk = group->GN_igtk;
2823 4 : group->GN_igtk = tmp;
2824 : #endif /* CONFIG_IEEE80211W */
2825 4 : wpa_gtk_update(wpa_auth, group);
2826 4 : wpa_group_config_group_keys(wpa_auth, group);
2827 : }
2828 : }
2829 :
2830 :
2831 21 : static const char * wpa_bool_txt(int bool)
2832 : {
2833 21 : return bool ? "TRUE" : "FALSE";
2834 : }
2835 :
2836 :
2837 : #define RSN_SUITE "%02x-%02x-%02x-%d"
2838 : #define RSN_SUITE_ARG(s) \
2839 : ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2840 :
2841 7 : int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2842 : {
2843 7 : int len = 0, ret;
2844 : char pmkid_txt[PMKID_LEN * 2 + 1];
2845 : #ifdef CONFIG_RSN_PREAUTH
2846 7 : const int preauth = 1;
2847 : #else /* CONFIG_RSN_PREAUTH */
2848 : const int preauth = 0;
2849 : #endif /* CONFIG_RSN_PREAUTH */
2850 :
2851 7 : if (wpa_auth == NULL)
2852 0 : return len;
2853 :
2854 14 : ret = os_snprintf(buf + len, buflen - len,
2855 : "dot11RSNAOptionImplemented=TRUE\n"
2856 : "dot11RSNAPreauthenticationImplemented=%s\n"
2857 : "dot11RSNAEnabled=%s\n"
2858 : "dot11RSNAPreauthenticationEnabled=%s\n",
2859 : wpa_bool_txt(preauth),
2860 7 : wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2861 : wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2862 7 : if (ret < 0 || (size_t) ret >= buflen - len)
2863 0 : return len;
2864 7 : len += ret;
2865 :
2866 7 : wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2867 7 : wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2868 :
2869 189 : ret = os_snprintf(
2870 : buf + len, buflen - len,
2871 : "dot11RSNAConfigVersion=%u\n"
2872 : "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2873 : /* FIX: dot11RSNAConfigGroupCipher */
2874 : /* FIX: dot11RSNAConfigGroupRekeyMethod */
2875 : /* FIX: dot11RSNAConfigGroupRekeyTime */
2876 : /* FIX: dot11RSNAConfigGroupRekeyPackets */
2877 : "dot11RSNAConfigGroupRekeyStrict=%u\n"
2878 : "dot11RSNAConfigGroupUpdateCount=%u\n"
2879 : "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2880 : "dot11RSNAConfigGroupCipherSize=%u\n"
2881 : "dot11RSNAConfigPMKLifetime=%u\n"
2882 : "dot11RSNAConfigPMKReauthThreshold=%u\n"
2883 : "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2884 : "dot11RSNAConfigSATimeout=%u\n"
2885 : "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2886 : "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2887 : "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2888 : "dot11RSNAPMKIDUsed=%s\n"
2889 : "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2890 : "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2891 : "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2892 : "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2893 : "dot11RSNA4WayHandshakeFailures=%u\n"
2894 : "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2895 : RSN_VERSION,
2896 7 : !!wpa_auth->conf.wpa_strict_rekey,
2897 : dot11RSNAConfigGroupUpdateCount,
2898 : dot11RSNAConfigPairwiseUpdateCount,
2899 7 : wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
2900 : dot11RSNAConfigPMKLifetime,
2901 : dot11RSNAConfigPMKReauthThreshold,
2902 : dot11RSNAConfigSATimeout,
2903 28 : RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2904 28 : RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2905 28 : RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2906 : pmkid_txt,
2907 28 : RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2908 28 : RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2909 28 : RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2910 : wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2911 : wpa_auth->dot11RSNA4WayHandshakeFailures);
2912 7 : if (ret < 0 || (size_t) ret >= buflen - len)
2913 0 : return len;
2914 7 : len += ret;
2915 :
2916 : /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2917 : /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2918 :
2919 : /* Private MIB */
2920 7 : ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2921 7 : wpa_auth->group->wpa_group_state);
2922 7 : if (ret < 0 || (size_t) ret >= buflen - len)
2923 0 : return len;
2924 7 : len += ret;
2925 :
2926 7 : return len;
2927 : }
2928 :
2929 :
2930 30 : int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2931 : {
2932 30 : int len = 0, ret;
2933 30 : u32 pairwise = 0;
2934 :
2935 30 : if (sm == NULL)
2936 12 : return 0;
2937 :
2938 : /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2939 :
2940 : /* dot11RSNAStatsEntry */
2941 :
2942 18 : pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
2943 : WPA_PROTO_RSN : WPA_PROTO_WPA,
2944 : sm->pairwise);
2945 18 : if (pairwise == 0)
2946 0 : return 0;
2947 :
2948 162 : ret = os_snprintf(
2949 : buf + len, buflen - len,
2950 : /* TODO: dot11RSNAStatsIndex */
2951 : "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2952 : "dot11RSNAStatsVersion=1\n"
2953 : "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2954 : /* TODO: dot11RSNAStatsTKIPICVErrors */
2955 : "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2956 : "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
2957 : /* TODO: dot11RSNAStatsCCMPReplays */
2958 : /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2959 : /* TODO: dot11RSNAStatsTKIPReplays */,
2960 108 : MAC2STR(sm->addr),
2961 36 : RSN_SUITE_ARG(pairwise),
2962 : sm->dot11RSNAStatsTKIPLocalMICFailures,
2963 : sm->dot11RSNAStatsTKIPRemoteMICFailures);
2964 18 : if (ret < 0 || (size_t) ret >= buflen - len)
2965 0 : return len;
2966 18 : len += ret;
2967 :
2968 : /* Private MIB */
2969 18 : ret = os_snprintf(buf + len, buflen - len,
2970 : "hostapdWPAPTKState=%d\n"
2971 : "hostapdWPAPTKGroupState=%d\n",
2972 18 : sm->wpa_ptk_state,
2973 18 : sm->wpa_ptk_group_state);
2974 18 : if (ret < 0 || (size_t) ret >= buflen - len)
2975 0 : return len;
2976 18 : len += ret;
2977 :
2978 18 : return len;
2979 : }
2980 :
2981 :
2982 2 : void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2983 : {
2984 2 : if (wpa_auth)
2985 2 : wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2986 2 : }
2987 :
2988 :
2989 3606 : int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2990 : {
2991 3606 : return sm && sm->pairwise_set;
2992 : }
2993 :
2994 :
2995 3213 : int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2996 : {
2997 3213 : return sm->pairwise;
2998 : }
2999 :
3000 :
3001 5874 : int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3002 : {
3003 5874 : if (sm == NULL)
3004 630 : return -1;
3005 5244 : return sm->wpa_key_mgmt;
3006 : }
3007 :
3008 :
3009 2209 : int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3010 : {
3011 2209 : if (sm == NULL)
3012 0 : return 0;
3013 2209 : return sm->wpa;
3014 : }
3015 :
3016 :
3017 1 : int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3018 : struct rsn_pmksa_cache_entry *entry)
3019 : {
3020 1 : if (sm == NULL || sm->pmksa != entry)
3021 0 : return -1;
3022 1 : sm->pmksa = NULL;
3023 1 : return 0;
3024 : }
3025 :
3026 :
3027 : struct rsn_pmksa_cache_entry *
3028 1270 : wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3029 : {
3030 1270 : return sm ? sm->pmksa : NULL;
3031 : }
3032 :
3033 :
3034 2 : void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3035 : {
3036 2 : if (sm)
3037 2 : sm->dot11RSNAStatsTKIPLocalMICFailures++;
3038 2 : }
3039 :
3040 :
3041 2660 : const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3042 : {
3043 2660 : if (wpa_auth == NULL)
3044 716 : return NULL;
3045 1944 : *len = wpa_auth->wpa_ie_len;
3046 1944 : return wpa_auth->wpa_ie;
3047 : }
3048 :
3049 :
3050 306 : int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
3051 : int session_timeout, struct eapol_state_machine *eapol)
3052 : {
3053 606 : if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3054 300 : sm->wpa_auth->conf.disable_pmksa_caching)
3055 11 : return -1;
3056 :
3057 590 : if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
3058 295 : sm->wpa_auth->addr, sm->addr, session_timeout,
3059 : eapol, sm->wpa_key_mgmt))
3060 295 : return 0;
3061 :
3062 0 : return -1;
3063 : }
3064 :
3065 :
3066 1 : int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3067 : const u8 *pmk, size_t len, const u8 *sta_addr,
3068 : int session_timeout,
3069 : struct eapol_state_machine *eapol)
3070 : {
3071 1 : if (wpa_auth == NULL)
3072 0 : return -1;
3073 :
3074 1 : if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
3075 : sta_addr, session_timeout, eapol,
3076 : WPA_KEY_MGMT_IEEE8021X))
3077 1 : return 0;
3078 :
3079 0 : return -1;
3080 : }
3081 :
3082 :
3083 9 : void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3084 : const u8 *sta_addr)
3085 : {
3086 : struct rsn_pmksa_cache_entry *pmksa;
3087 :
3088 9 : if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3089 11 : return;
3090 7 : pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3091 7 : if (pmksa) {
3092 36 : wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3093 36 : MACSTR " based on request", MAC2STR(sta_addr));
3094 6 : pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3095 : }
3096 : }
3097 :
3098 :
3099 : static struct wpa_group *
3100 6 : wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3101 : {
3102 : struct wpa_group *group;
3103 :
3104 6 : if (wpa_auth == NULL || wpa_auth->group == NULL)
3105 0 : return NULL;
3106 :
3107 6 : wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
3108 : vlan_id);
3109 6 : group = wpa_group_init(wpa_auth, vlan_id, 0);
3110 6 : if (group == NULL)
3111 0 : return NULL;
3112 :
3113 6 : group->next = wpa_auth->group->next;
3114 6 : wpa_auth->group->next = group;
3115 :
3116 6 : return group;
3117 : }
3118 :
3119 :
3120 12 : int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
3121 : {
3122 : struct wpa_group *group;
3123 :
3124 12 : if (sm == NULL || sm->wpa_auth == NULL)
3125 6 : return 0;
3126 :
3127 6 : group = sm->wpa_auth->group;
3128 22 : while (group) {
3129 10 : if (group->vlan_id == vlan_id)
3130 0 : break;
3131 10 : group = group->next;
3132 : }
3133 :
3134 6 : if (group == NULL) {
3135 6 : group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
3136 6 : if (group == NULL)
3137 0 : return -1;
3138 : }
3139 :
3140 6 : if (sm->group == group)
3141 0 : return 0;
3142 :
3143 6 : if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3144 0 : return -1;
3145 :
3146 36 : wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
3147 36 : "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
3148 :
3149 6 : sm->group = group;
3150 6 : return 0;
3151 : }
3152 :
3153 :
3154 1171 : void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
3155 : struct wpa_state_machine *sm, int ack)
3156 : {
3157 1171 : if (wpa_auth == NULL || sm == NULL)
3158 1171 : return;
3159 7026 : wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
3160 7026 : " ack=%d", MAC2STR(sm->addr), ack);
3161 1171 : if (sm->pending_1_of_4_timeout && ack) {
3162 : /*
3163 : * Some deployed supplicant implementations update their SNonce
3164 : * for each EAPOL-Key 2/4 message even within the same 4-way
3165 : * handshake and then fail to use the first SNonce when
3166 : * deriving the PTK. This results in unsuccessful 4-way
3167 : * handshake whenever the relatively short initial timeout is
3168 : * reached and EAPOL-Key 1/4 is retransmitted. Try to work
3169 : * around this by increasing the timeout now that we know that
3170 : * the station has received the frame.
3171 : */
3172 561 : int timeout_ms = eapol_key_timeout_subseq;
3173 561 : wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
3174 : "timeout by %u ms because of acknowledged frame",
3175 : timeout_ms);
3176 561 : eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
3177 561 : eloop_register_timeout(timeout_ms / 1000,
3178 561 : (timeout_ms % 1000) * 1000,
3179 : wpa_send_eapol_timeout, wpa_auth, sm);
3180 : }
3181 : }
3182 :
3183 :
3184 1020 : int wpa_auth_uses_sae(struct wpa_state_machine *sm)
3185 : {
3186 1020 : if (sm == NULL)
3187 0 : return 0;
3188 1020 : return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
3189 : }
3190 :
3191 :
3192 4 : int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
3193 : {
3194 4 : if (sm == NULL)
3195 0 : return 0;
3196 4 : return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
3197 : }
3198 :
3199 :
3200 : #ifdef CONFIG_P2P
3201 : int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
3202 : {
3203 : if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
3204 : return -1;
3205 : os_memcpy(addr, sm->ip_addr, 4);
3206 : return 0;
3207 : }
3208 : #endif /* CONFIG_P2P */
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