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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(int akmp, struct wpa_ptk *PTK, u8 *data, | |
37 | size_t data_len); | |
38 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx); | |
39 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, | |
40 | struct wpa_group *group); | |
41 | static void wpa_request_new_ptk(struct wpa_state_machine *sm); | |
42 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
43 | struct wpa_group *group); | |
44 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, | |
45 | struct wpa_group *group); | |
46 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, | |
47 | const u8 *pmk, struct wpa_ptk *ptk); | |
48 | ||
49 | static const u32 dot11RSNAConfigGroupUpdateCount = 4; | |
50 | static const u32 dot11RSNAConfigPairwiseUpdateCount = 4; | |
51 | static const u32 eapol_key_timeout_first = 100; /* ms */ | |
52 | static const u32 eapol_key_timeout_subseq = 1000; /* ms */ | |
53 | static const u32 eapol_key_timeout_first_group = 500; /* ms */ | |
54 | ||
55 | /* TODO: make these configurable */ | |
56 | static const int dot11RSNAConfigPMKLifetime = 43200; | |
57 | static const int dot11RSNAConfigPMKReauthThreshold = 70; | |
58 | static const int dot11RSNAConfigSATimeout = 60; | |
59 | ||
60 | ||
61 | static inline int wpa_auth_mic_failure_report( | |
62 | struct wpa_authenticator *wpa_auth, const u8 *addr) | |
63 | { | |
64 | if (wpa_auth->cb.mic_failure_report) | |
65 | return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | ||
70 | static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth, | |
71 | const u8 *addr, wpa_eapol_variable var, | |
72 | int value) | |
73 | { | |
74 | if (wpa_auth->cb.set_eapol) | |
75 | wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value); | |
76 | } | |
77 | ||
78 | ||
79 | static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth, | |
80 | const u8 *addr, wpa_eapol_variable var) | |
81 | { | |
82 | if (wpa_auth->cb.get_eapol == NULL) | |
83 | return -1; | |
84 | return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var); | |
85 | } | |
86 | ||
87 | ||
88 | static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth, | |
89 | const u8 *addr, | |
90 | const u8 *p2p_dev_addr, | |
91 | const u8 *prev_psk) | |
92 | { | |
93 | if (wpa_auth->cb.get_psk == NULL) | |
94 | return NULL; | |
95 | return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr, | |
96 | prev_psk); | |
97 | } | |
98 | ||
99 | ||
100 | static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth, | |
101 | const u8 *addr, u8 *msk, size_t *len) | |
102 | { | |
103 | if (wpa_auth->cb.get_msk == NULL) | |
104 | return -1; | |
105 | return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len); | |
106 | } | |
107 | ||
108 | ||
109 | static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth, | |
110 | int vlan_id, | |
111 | enum wpa_alg alg, const u8 *addr, int idx, | |
112 | u8 *key, size_t key_len) | |
113 | { | |
114 | if (wpa_auth->cb.set_key == NULL) | |
115 | return -1; | |
116 | return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx, | |
117 | key, key_len); | |
118 | } | |
119 | ||
120 | ||
121 | static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth, | |
122 | const u8 *addr, int idx, u8 *seq) | |
123 | { | |
124 | if (wpa_auth->cb.get_seqnum == NULL) | |
125 | return -1; | |
126 | return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq); | |
127 | } | |
128 | ||
129 | ||
130 | static inline int | |
131 | wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
132 | const u8 *data, size_t data_len, int encrypt) | |
133 | { | |
134 | if (wpa_auth->cb.send_eapol == NULL) | |
135 | return -1; | |
136 | return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len, | |
137 | encrypt); | |
138 | } | |
139 | ||
140 | ||
141 | #ifdef CONFIG_MESH | |
142 | static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth, | |
143 | const u8 *addr) | |
144 | { | |
145 | if (wpa_auth->cb.start_ampe == NULL) | |
146 | return -1; | |
147 | return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr); | |
148 | } | |
149 | #endif /* CONFIG_MESH */ | |
150 | ||
151 | ||
152 | int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth, | |
153 | int (*cb)(struct wpa_state_machine *sm, void *ctx), | |
154 | void *cb_ctx) | |
155 | { | |
156 | if (wpa_auth->cb.for_each_sta == NULL) | |
157 | return 0; | |
158 | return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx); | |
159 | } | |
160 | ||
161 | ||
162 | int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth, | |
163 | int (*cb)(struct wpa_authenticator *a, void *ctx), | |
164 | void *cb_ctx) | |
165 | { | |
166 | if (wpa_auth->cb.for_each_auth == NULL) | |
167 | return 0; | |
168 | return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx); | |
169 | } | |
170 | ||
171 | ||
172 | void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
173 | logger_level level, const char *txt) | |
174 | { | |
175 | if (wpa_auth->cb.logger == NULL) | |
176 | return; | |
177 | wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt); | |
178 | } | |
179 | ||
180 | ||
181 | void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
182 | logger_level level, const char *fmt, ...) | |
183 | { | |
184 | char *format; | |
185 | int maxlen; | |
186 | va_list ap; | |
187 | ||
188 | if (wpa_auth->cb.logger == NULL) | |
189 | return; | |
190 | ||
191 | maxlen = os_strlen(fmt) + 100; | |
192 | format = os_malloc(maxlen); | |
193 | if (!format) | |
194 | return; | |
195 | ||
196 | va_start(ap, fmt); | |
197 | vsnprintf(format, maxlen, fmt, ap); | |
198 | va_end(ap); | |
199 | ||
200 | wpa_auth_logger(wpa_auth, addr, level, format); | |
201 | ||
202 | os_free(format); | |
203 | } | |
204 | ||
205 | ||
206 | static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth, | |
207 | const u8 *addr) | |
208 | { | |
209 | if (wpa_auth->cb.disconnect == NULL) | |
210 | return; | |
211 | wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr)); | |
212 | wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr, | |
213 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
214 | } | |
215 | ||
216 | ||
217 | static int wpa_use_aes_cmac(struct wpa_state_machine *sm) | |
218 | { | |
219 | int ret = 0; | |
220 | #ifdef CONFIG_IEEE80211R | |
221 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) | |
222 | ret = 1; | |
223 | #endif /* CONFIG_IEEE80211R */ | |
224 | #ifdef CONFIG_IEEE80211W | |
225 | if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt)) | |
226 | ret = 1; | |
227 | #endif /* CONFIG_IEEE80211W */ | |
228 | if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) | |
229 | ret = 1; | |
230 | return ret; | |
231 | } | |
232 | ||
233 | ||
234 | static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx) | |
235 | { | |
236 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
237 | ||
238 | if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) { | |
239 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " | |
240 | "initialization."); | |
241 | } else { | |
242 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd"); | |
243 | wpa_hexdump_key(MSG_DEBUG, "GMK", | |
244 | wpa_auth->group->GMK, WPA_GMK_LEN); | |
245 | } | |
246 | ||
247 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
248 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
249 | wpa_rekey_gmk, wpa_auth, NULL); | |
250 | } | |
251 | } | |
252 | ||
253 | ||
254 | static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx) | |
255 | { | |
256 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
257 | struct wpa_group *group; | |
258 | ||
259 | wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK"); | |
260 | for (group = wpa_auth->group; group; group = group->next) { | |
261 | group->GTKReKey = TRUE; | |
262 | do { | |
263 | group->changed = FALSE; | |
264 | wpa_group_sm_step(wpa_auth, group); | |
265 | } while (group->changed); | |
266 | } | |
267 | ||
268 | if (wpa_auth->conf.wpa_group_rekey) { | |
269 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, | |
270 | 0, wpa_rekey_gtk, wpa_auth, NULL); | |
271 | } | |
272 | } | |
273 | ||
274 | ||
275 | static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx) | |
276 | { | |
277 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
278 | struct wpa_state_machine *sm = timeout_ctx; | |
279 | ||
280 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK"); | |
281 | wpa_request_new_ptk(sm); | |
282 | wpa_sm_step(sm); | |
283 | } | |
284 | ||
285 | ||
286 | static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx) | |
287 | { | |
288 | if (sm->pmksa == ctx) | |
289 | sm->pmksa = NULL; | |
290 | return 0; | |
291 | } | |
292 | ||
293 | ||
294 | static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, | |
295 | void *ctx) | |
296 | { | |
297 | struct wpa_authenticator *wpa_auth = ctx; | |
298 | wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry); | |
299 | } | |
300 | ||
301 | ||
302 | static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth, | |
303 | struct wpa_group *group) | |
304 | { | |
305 | u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)]; | |
306 | u8 rkey[32]; | |
307 | unsigned long ptr; | |
308 | ||
309 | if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0) | |
310 | return -1; | |
311 | wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN); | |
312 | ||
313 | /* | |
314 | * Counter = PRF-256(Random number, "Init Counter", | |
315 | * Local MAC Address || Time) | |
316 | */ | |
317 | os_memcpy(buf, wpa_auth->addr, ETH_ALEN); | |
318 | wpa_get_ntp_timestamp(buf + ETH_ALEN); | |
319 | ptr = (unsigned long) group; | |
320 | os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr)); | |
321 | if (random_get_bytes(rkey, sizeof(rkey)) < 0) | |
322 | return -1; | |
323 | ||
324 | if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf), | |
325 | group->Counter, WPA_NONCE_LEN) < 0) | |
326 | return -1; | |
327 | wpa_hexdump_key(MSG_DEBUG, "Key Counter", | |
328 | group->Counter, WPA_NONCE_LEN); | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | ||
334 | static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth, | |
335 | int vlan_id, int delay_init) | |
336 | { | |
337 | struct wpa_group *group; | |
338 | ||
339 | group = os_zalloc(sizeof(struct wpa_group)); | |
340 | if (group == NULL) | |
341 | return NULL; | |
342 | ||
343 | group->GTKAuthenticator = TRUE; | |
344 | group->vlan_id = vlan_id; | |
345 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); | |
346 | ||
347 | if (random_pool_ready() != 1) { | |
348 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
349 | "for secure operations - update keys later when " | |
350 | "the first station connects"); | |
351 | } | |
352 | ||
353 | /* | |
354 | * Set initial GMK/Counter value here. The actual values that will be | |
355 | * used in negotiations will be set once the first station tries to | |
356 | * connect. This allows more time for collecting additional randomness | |
357 | * on embedded devices. | |
358 | */ | |
359 | if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) { | |
360 | wpa_printf(MSG_ERROR, "Failed to get random data for WPA " | |
361 | "initialization."); | |
362 | os_free(group); | |
363 | return NULL; | |
364 | } | |
365 | ||
366 | group->GInit = TRUE; | |
367 | if (delay_init) { | |
368 | wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start " | |
369 | "until Beacon frames have been configured"); | |
370 | /* Initialization is completed in wpa_init_keys(). */ | |
371 | } else { | |
372 | wpa_group_sm_step(wpa_auth, group); | |
373 | group->GInit = FALSE; | |
374 | wpa_group_sm_step(wpa_auth, group); | |
375 | } | |
376 | ||
377 | return group; | |
378 | } | |
379 | ||
380 | ||
381 | /** | |
382 | * wpa_init - Initialize WPA authenticator | |
383 | * @addr: Authenticator address | |
384 | * @conf: Configuration for WPA authenticator | |
385 | * @cb: Callback functions for WPA authenticator | |
386 | * Returns: Pointer to WPA authenticator data or %NULL on failure | |
387 | */ | |
388 | struct wpa_authenticator * wpa_init(const u8 *addr, | |
389 | struct wpa_auth_config *conf, | |
390 | struct wpa_auth_callbacks *cb) | |
391 | { | |
392 | struct wpa_authenticator *wpa_auth; | |
393 | ||
394 | wpa_auth = os_zalloc(sizeof(struct wpa_authenticator)); | |
395 | if (wpa_auth == NULL) | |
396 | return NULL; | |
397 | os_memcpy(wpa_auth->addr, addr, ETH_ALEN); | |
398 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
399 | os_memcpy(&wpa_auth->cb, cb, sizeof(*cb)); | |
400 | ||
401 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { | |
402 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
403 | os_free(wpa_auth); | |
404 | return NULL; | |
405 | } | |
406 | ||
407 | wpa_auth->group = wpa_group_init(wpa_auth, 0, 1); | |
408 | if (wpa_auth->group == NULL) { | |
409 | os_free(wpa_auth->wpa_ie); | |
410 | os_free(wpa_auth); | |
411 | return NULL; | |
412 | } | |
413 | ||
414 | wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb, | |
415 | wpa_auth); | |
416 | if (wpa_auth->pmksa == NULL) { | |
417 | wpa_printf(MSG_ERROR, "PMKSA cache initialization failed."); | |
418 | os_free(wpa_auth->group); | |
419 | os_free(wpa_auth->wpa_ie); | |
420 | os_free(wpa_auth); | |
421 | return NULL; | |
422 | } | |
423 | ||
424 | #ifdef CONFIG_IEEE80211R | |
425 | wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init(); | |
426 | if (wpa_auth->ft_pmk_cache == NULL) { | |
427 | wpa_printf(MSG_ERROR, "FT PMK cache initialization failed."); | |
428 | os_free(wpa_auth->group); | |
429 | os_free(wpa_auth->wpa_ie); | |
430 | pmksa_cache_auth_deinit(wpa_auth->pmksa); | |
431 | os_free(wpa_auth); | |
432 | return NULL; | |
433 | } | |
434 | #endif /* CONFIG_IEEE80211R */ | |
435 | ||
436 | if (wpa_auth->conf.wpa_gmk_rekey) { | |
437 | eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0, | |
438 | wpa_rekey_gmk, wpa_auth, NULL); | |
439 | } | |
440 | ||
441 | if (wpa_auth->conf.wpa_group_rekey) { | |
442 | eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0, | |
443 | wpa_rekey_gtk, wpa_auth, NULL); | |
444 | } | |
445 | ||
446 | #ifdef CONFIG_P2P | |
447 | if (WPA_GET_BE32(conf->ip_addr_start)) { | |
448 | int count = WPA_GET_BE32(conf->ip_addr_end) - | |
449 | WPA_GET_BE32(conf->ip_addr_start) + 1; | |
450 | if (count > 1000) | |
451 | count = 1000; | |
452 | if (count > 0) | |
453 | wpa_auth->ip_pool = bitfield_alloc(count); | |
454 | } | |
455 | #endif /* CONFIG_P2P */ | |
456 | ||
457 | return wpa_auth; | |
458 | } | |
459 | ||
460 | ||
461 | int wpa_init_keys(struct wpa_authenticator *wpa_auth) | |
462 | { | |
463 | struct wpa_group *group = wpa_auth->group; | |
464 | ||
465 | wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial " | |
466 | "keys"); | |
467 | wpa_group_sm_step(wpa_auth, group); | |
468 | group->GInit = FALSE; | |
469 | wpa_group_sm_step(wpa_auth, group); | |
470 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
471 | return -1; | |
472 | return 0; | |
473 | } | |
474 | ||
475 | ||
476 | /** | |
477 | * wpa_deinit - Deinitialize WPA authenticator | |
478 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
479 | */ | |
480 | void wpa_deinit(struct wpa_authenticator *wpa_auth) | |
481 | { | |
482 | struct wpa_group *group, *prev; | |
483 | ||
484 | eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL); | |
485 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
486 | ||
487 | #ifdef CONFIG_PEERKEY | |
488 | while (wpa_auth->stsl_negotiations) | |
489 | wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations); | |
490 | #endif /* CONFIG_PEERKEY */ | |
491 | ||
492 | pmksa_cache_auth_deinit(wpa_auth->pmksa); | |
493 | ||
494 | #ifdef CONFIG_IEEE80211R | |
495 | wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache); | |
496 | wpa_auth->ft_pmk_cache = NULL; | |
497 | #endif /* CONFIG_IEEE80211R */ | |
498 | ||
499 | #ifdef CONFIG_P2P | |
500 | bitfield_free(wpa_auth->ip_pool); | |
501 | #endif /* CONFIG_P2P */ | |
502 | ||
503 | ||
504 | os_free(wpa_auth->wpa_ie); | |
505 | ||
506 | group = wpa_auth->group; | |
507 | while (group) { | |
508 | prev = group; | |
509 | group = group->next; | |
510 | os_free(prev); | |
511 | } | |
512 | ||
513 | os_free(wpa_auth); | |
514 | } | |
515 | ||
516 | ||
517 | /** | |
518 | * wpa_reconfig - Update WPA authenticator configuration | |
519 | * @wpa_auth: Pointer to WPA authenticator data from wpa_init() | |
520 | * @conf: Configuration for WPA authenticator | |
521 | */ | |
522 | int wpa_reconfig(struct wpa_authenticator *wpa_auth, | |
523 | struct wpa_auth_config *conf) | |
524 | { | |
525 | struct wpa_group *group; | |
526 | if (wpa_auth == NULL) | |
527 | return 0; | |
528 | ||
529 | os_memcpy(&wpa_auth->conf, conf, sizeof(*conf)); | |
530 | if (wpa_auth_gen_wpa_ie(wpa_auth)) { | |
531 | wpa_printf(MSG_ERROR, "Could not generate WPA IE."); | |
532 | return -1; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Reinitialize GTK to make sure it is suitable for the new | |
537 | * configuration. | |
538 | */ | |
539 | group = wpa_auth->group; | |
540 | group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group); | |
541 | group->GInit = TRUE; | |
542 | wpa_group_sm_step(wpa_auth, group); | |
543 | group->GInit = FALSE; | |
544 | wpa_group_sm_step(wpa_auth, group); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | ||
550 | struct wpa_state_machine * | |
551 | wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
552 | const u8 *p2p_dev_addr) | |
553 | { | |
554 | struct wpa_state_machine *sm; | |
555 | ||
556 | if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
557 | return NULL; | |
558 | ||
559 | sm = os_zalloc(sizeof(struct wpa_state_machine)); | |
560 | if (sm == NULL) | |
561 | return NULL; | |
562 | os_memcpy(sm->addr, addr, ETH_ALEN); | |
563 | if (p2p_dev_addr) | |
564 | os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); | |
565 | ||
566 | sm->wpa_auth = wpa_auth; | |
567 | sm->group = wpa_auth->group; | |
568 | ||
569 | return sm; | |
570 | } | |
571 | ||
572 | ||
573 | int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth, | |
574 | struct wpa_state_machine *sm) | |
575 | { | |
576 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
577 | return -1; | |
578 | ||
579 | #ifdef CONFIG_IEEE80211R | |
580 | if (sm->ft_completed) { | |
581 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
582 | "FT authentication already completed - do not " | |
583 | "start 4-way handshake"); | |
584 | /* Go to PTKINITDONE state to allow GTK rekeying */ | |
585 | sm->wpa_ptk_state = WPA_PTK_PTKINITDONE; | |
586 | return 0; | |
587 | } | |
588 | #endif /* CONFIG_IEEE80211R */ | |
589 | ||
590 | if (sm->started) { | |
591 | os_memset(&sm->key_replay, 0, sizeof(sm->key_replay)); | |
592 | sm->ReAuthenticationRequest = TRUE; | |
593 | return wpa_sm_step(sm); | |
594 | } | |
595 | ||
596 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
597 | "start authentication"); | |
598 | sm->started = 1; | |
599 | ||
600 | sm->Init = TRUE; | |
601 | if (wpa_sm_step(sm) == 1) | |
602 | return 1; /* should not really happen */ | |
603 | sm->Init = FALSE; | |
604 | sm->AuthenticationRequest = TRUE; | |
605 | return wpa_sm_step(sm); | |
606 | } | |
607 | ||
608 | ||
609 | void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm) | |
610 | { | |
611 | /* WPA/RSN was not used - clear WPA state. This is needed if the STA | |
612 | * reassociates back to the same AP while the previous entry for the | |
613 | * STA has not yet been removed. */ | |
614 | if (sm == NULL) | |
615 | return; | |
616 | ||
617 | sm->wpa_key_mgmt = 0; | |
618 | } | |
619 | ||
620 | ||
621 | static void wpa_free_sta_sm(struct wpa_state_machine *sm) | |
622 | { | |
623 | #ifdef CONFIG_P2P | |
624 | if (WPA_GET_BE32(sm->ip_addr)) { | |
625 | u32 start; | |
626 | wpa_printf(MSG_DEBUG, "P2P: Free assigned IP " | |
627 | "address %u.%u.%u.%u from " MACSTR, | |
628 | sm->ip_addr[0], sm->ip_addr[1], | |
629 | sm->ip_addr[2], sm->ip_addr[3], | |
630 | MAC2STR(sm->addr)); | |
631 | start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start); | |
632 | bitfield_clear(sm->wpa_auth->ip_pool, | |
633 | WPA_GET_BE32(sm->ip_addr) - start); | |
634 | } | |
635 | #endif /* CONFIG_P2P */ | |
636 | if (sm->GUpdateStationKeys) { | |
637 | sm->group->GKeyDoneStations--; | |
638 | sm->GUpdateStationKeys = FALSE; | |
639 | } | |
640 | #ifdef CONFIG_IEEE80211R | |
641 | os_free(sm->assoc_resp_ftie); | |
642 | wpabuf_free(sm->ft_pending_req_ies); | |
643 | #endif /* CONFIG_IEEE80211R */ | |
644 | os_free(sm->last_rx_eapol_key); | |
645 | os_free(sm->wpa_ie); | |
646 | os_free(sm); | |
647 | } | |
648 | ||
649 | ||
650 | void wpa_auth_sta_deinit(struct wpa_state_machine *sm) | |
651 | { | |
652 | if (sm == NULL) | |
653 | return; | |
654 | ||
655 | if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) { | |
656 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
657 | "strict rekeying - force GTK rekey since STA " | |
658 | "is leaving"); | |
659 | eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL); | |
660 | eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth, | |
661 | NULL); | |
662 | } | |
663 | ||
664 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); | |
665 | sm->pending_1_of_4_timeout = 0; | |
666 | eloop_cancel_timeout(wpa_sm_call_step, sm, NULL); | |
667 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
668 | if (sm->in_step_loop) { | |
669 | /* Must not free state machine while wpa_sm_step() is running. | |
670 | * Freeing will be completed in the end of wpa_sm_step(). */ | |
671 | wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state " | |
672 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
673 | sm->pending_deinit = 1; | |
674 | } else | |
675 | wpa_free_sta_sm(sm); | |
676 | } | |
677 | ||
678 | ||
679 | static void wpa_request_new_ptk(struct wpa_state_machine *sm) | |
680 | { | |
681 | if (sm == NULL) | |
682 | return; | |
683 | ||
684 | sm->PTKRequest = TRUE; | |
685 | sm->PTK_valid = 0; | |
686 | } | |
687 | ||
688 | ||
689 | static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr, | |
690 | const u8 *replay_counter) | |
691 | { | |
692 | int i; | |
693 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
694 | if (!ctr[i].valid) | |
695 | break; | |
696 | if (os_memcmp(replay_counter, ctr[i].counter, | |
697 | WPA_REPLAY_COUNTER_LEN) == 0) | |
698 | return 1; | |
699 | } | |
700 | return 0; | |
701 | } | |
702 | ||
703 | ||
704 | static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr, | |
705 | const u8 *replay_counter) | |
706 | { | |
707 | int i; | |
708 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
709 | if (ctr[i].valid && | |
710 | (replay_counter == NULL || | |
711 | os_memcmp(replay_counter, ctr[i].counter, | |
712 | WPA_REPLAY_COUNTER_LEN) == 0)) | |
713 | ctr[i].valid = FALSE; | |
714 | } | |
715 | } | |
716 | ||
717 | ||
718 | #ifdef CONFIG_IEEE80211R | |
719 | static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth, | |
720 | struct wpa_state_machine *sm, | |
721 | struct wpa_eapol_ie_parse *kde) | |
722 | { | |
723 | struct wpa_ie_data ie; | |
724 | struct rsn_mdie *mdie; | |
725 | ||
726 | if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 || | |
727 | ie.num_pmkid != 1 || ie.pmkid == NULL) { | |
728 | wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in " | |
729 | "FT 4-way handshake message 2/4"); | |
730 | return -1; | |
731 | } | |
732 | ||
733 | os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN); | |
734 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant", | |
735 | sm->sup_pmk_r1_name, PMKID_LEN); | |
736 | ||
737 | if (!kde->mdie || !kde->ftie) { | |
738 | wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake " | |
739 | "message 2/4", kde->mdie ? "FTIE" : "MDIE"); | |
740 | return -1; | |
741 | } | |
742 | ||
743 | mdie = (struct rsn_mdie *) (kde->mdie + 2); | |
744 | if (kde->mdie[1] < sizeof(struct rsn_mdie) || | |
745 | os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain, | |
746 | MOBILITY_DOMAIN_ID_LEN) != 0) { | |
747 | wpa_printf(MSG_DEBUG, "FT: MDIE mismatch"); | |
748 | return -1; | |
749 | } | |
750 | ||
751 | if (sm->assoc_resp_ftie && | |
752 | (kde->ftie[1] != sm->assoc_resp_ftie[1] || | |
753 | os_memcmp(kde->ftie, sm->assoc_resp_ftie, | |
754 | 2 + sm->assoc_resp_ftie[1]) != 0)) { | |
755 | wpa_printf(MSG_DEBUG, "FT: FTIE mismatch"); | |
756 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4", | |
757 | kde->ftie, kde->ftie_len); | |
758 | wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp", | |
759 | sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]); | |
760 | return -1; | |
761 | } | |
762 | ||
763 | return 0; | |
764 | } | |
765 | #endif /* CONFIG_IEEE80211R */ | |
766 | ||
767 | ||
768 | static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth, | |
769 | struct wpa_state_machine *sm, int group) | |
770 | { | |
771 | /* Supplicant reported a Michael MIC error */ | |
772 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
773 | "received EAPOL-Key Error Request " | |
774 | "(STA detected Michael MIC failure (group=%d))", | |
775 | group); | |
776 | ||
777 | if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) { | |
778 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
779 | "ignore Michael MIC failure report since " | |
780 | "group cipher is not TKIP"); | |
781 | } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) { | |
782 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
783 | "ignore Michael MIC failure report since " | |
784 | "pairwise cipher is not TKIP"); | |
785 | } else { | |
786 | if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0) | |
787 | return 1; /* STA entry was removed */ | |
788 | sm->dot11RSNAStatsTKIPRemoteMICFailures++; | |
789 | wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Error report is not a request for a new key handshake, but since | |
794 | * Authenticator may do it, let's change the keys now anyway. | |
795 | */ | |
796 | wpa_request_new_ptk(sm); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | ||
801 | static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data, | |
802 | size_t data_len) | |
803 | { | |
804 | struct wpa_ptk PTK; | |
805 | int ok = 0; | |
806 | const u8 *pmk = NULL; | |
807 | ||
808 | for (;;) { | |
809 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { | |
810 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, | |
811 | sm->p2p_dev_addr, pmk); | |
812 | if (pmk == NULL) | |
813 | break; | |
814 | } else | |
815 | pmk = sm->PMK; | |
816 | ||
817 | wpa_derive_ptk(sm, sm->alt_SNonce, pmk, &PTK); | |
818 | ||
819 | if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len) | |
820 | == 0) { | |
821 | ok = 1; | |
822 | break; | |
823 | } | |
824 | ||
825 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) | |
826 | break; | |
827 | } | |
828 | ||
829 | if (!ok) { | |
830 | wpa_printf(MSG_DEBUG, | |
831 | "WPA: Earlier SNonce did not result in matching MIC"); | |
832 | return -1; | |
833 | } | |
834 | ||
835 | wpa_printf(MSG_DEBUG, | |
836 | "WPA: Earlier SNonce resulted in matching MIC"); | |
837 | sm->alt_snonce_valid = 0; | |
838 | os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN); | |
839 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
840 | sm->PTK_valid = TRUE; | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | ||
846 | void wpa_receive(struct wpa_authenticator *wpa_auth, | |
847 | struct wpa_state_machine *sm, | |
848 | u8 *data, size_t data_len) | |
849 | { | |
850 | struct ieee802_1x_hdr *hdr; | |
851 | struct wpa_eapol_key *key; | |
852 | u16 key_info, key_data_length; | |
853 | enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST, | |
854 | SMK_M1, SMK_M3, SMK_ERROR } msg; | |
855 | char *msgtxt; | |
856 | struct wpa_eapol_ie_parse kde; | |
857 | int ft; | |
858 | const u8 *eapol_key_ie; | |
859 | size_t eapol_key_ie_len; | |
860 | ||
861 | if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL) | |
862 | return; | |
863 | ||
864 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
865 | return; | |
866 | ||
867 | hdr = (struct ieee802_1x_hdr *) data; | |
868 | key = (struct wpa_eapol_key *) (hdr + 1); | |
869 | key_info = WPA_GET_BE16(key->key_info); | |
870 | key_data_length = WPA_GET_BE16(key->key_data_length); | |
871 | wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR | |
872 | " key_info=0x%x type=%u key_data_length=%u", | |
873 | MAC2STR(sm->addr), key_info, key->type, key_data_length); | |
874 | if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) { | |
875 | wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - " | |
876 | "key_data overflow (%d > %lu)", | |
877 | key_data_length, | |
878 | (unsigned long) (data_len - sizeof(*hdr) - | |
879 | sizeof(*key))); | |
880 | return; | |
881 | } | |
882 | ||
883 | if (sm->wpa == WPA_VERSION_WPA2) { | |
884 | if (key->type == EAPOL_KEY_TYPE_WPA) { | |
885 | /* | |
886 | * Some deployed station implementations seem to send | |
887 | * msg 4/4 with incorrect type value in WPA2 mode. | |
888 | */ | |
889 | wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key " | |
890 | "with unexpected WPA type in RSN mode"); | |
891 | } else if (key->type != EAPOL_KEY_TYPE_RSN) { | |
892 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " | |
893 | "unexpected type %d in RSN mode", | |
894 | key->type); | |
895 | return; | |
896 | } | |
897 | } else { | |
898 | if (key->type != EAPOL_KEY_TYPE_WPA) { | |
899 | wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with " | |
900 | "unexpected type %d in WPA mode", | |
901 | key->type); | |
902 | return; | |
903 | } | |
904 | } | |
905 | ||
906 | wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce, | |
907 | WPA_NONCE_LEN); | |
908 | wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter", | |
909 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
910 | ||
911 | /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys | |
912 | * are set */ | |
913 | ||
914 | if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) == | |
915 | (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) { | |
916 | if (key_info & WPA_KEY_INFO_ERROR) { | |
917 | msg = SMK_ERROR; | |
918 | msgtxt = "SMK Error"; | |
919 | } else { | |
920 | msg = SMK_M1; | |
921 | msgtxt = "SMK M1"; | |
922 | } | |
923 | } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { | |
924 | msg = SMK_M3; | |
925 | msgtxt = "SMK M3"; | |
926 | } else if (key_info & WPA_KEY_INFO_REQUEST) { | |
927 | msg = REQUEST; | |
928 | msgtxt = "Request"; | |
929 | } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) { | |
930 | msg = GROUP_2; | |
931 | msgtxt = "2/2 Group"; | |
932 | } else if (key_data_length == 0) { | |
933 | msg = PAIRWISE_4; | |
934 | msgtxt = "4/4 Pairwise"; | |
935 | } else { | |
936 | msg = PAIRWISE_2; | |
937 | msgtxt = "2/4 Pairwise"; | |
938 | } | |
939 | ||
940 | /* TODO: key_info type validation for PeerKey */ | |
941 | if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 || | |
942 | msg == GROUP_2) { | |
943 | u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK; | |
944 | if (sm->pairwise == WPA_CIPHER_CCMP || | |
945 | sm->pairwise == WPA_CIPHER_GCMP) { | |
946 | if (wpa_use_aes_cmac(sm) && | |
947 | sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN && | |
948 | !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) && | |
949 | ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
950 | wpa_auth_logger(wpa_auth, sm->addr, | |
951 | LOGGER_WARNING, | |
952 | "advertised support for " | |
953 | "AES-128-CMAC, but did not " | |
954 | "use it"); | |
955 | return; | |
956 | } | |
957 | ||
958 | if (!wpa_use_aes_cmac(sm) && | |
959 | ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { | |
960 | wpa_auth_logger(wpa_auth, sm->addr, | |
961 | LOGGER_WARNING, | |
962 | "did not use HMAC-SHA1-AES " | |
963 | "with CCMP/GCMP"); | |
964 | return; | |
965 | } | |
966 | } | |
967 | ||
968 | if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) && | |
969 | ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { | |
970 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
971 | "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases"); | |
972 | return; | |
973 | } | |
974 | } | |
975 | ||
976 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
977 | if (sm->req_replay_counter_used && | |
978 | os_memcmp(key->replay_counter, sm->req_replay_counter, | |
979 | WPA_REPLAY_COUNTER_LEN) <= 0) { | |
980 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING, | |
981 | "received EAPOL-Key request with " | |
982 | "replayed counter"); | |
983 | return; | |
984 | } | |
985 | } | |
986 | ||
987 | if (!(key_info & WPA_KEY_INFO_REQUEST) && | |
988 | !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) { | |
989 | int i; | |
990 | ||
991 | if (msg == PAIRWISE_2 && | |
992 | wpa_replay_counter_valid(sm->prev_key_replay, | |
993 | key->replay_counter) && | |
994 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
995 | os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0) | |
996 | { | |
997 | /* | |
998 | * Some supplicant implementations (e.g., Windows XP | |
999 | * WZC) update SNonce for each EAPOL-Key 2/4. This | |
1000 | * breaks the workaround on accepting any of the | |
1001 | * pending requests, so allow the SNonce to be updated | |
1002 | * even if we have already sent out EAPOL-Key 3/4. | |
1003 | */ | |
1004 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1005 | "Process SNonce update from STA " | |
1006 | "based on retransmitted EAPOL-Key " | |
1007 | "1/4"); | |
1008 | sm->update_snonce = 1; | |
1009 | os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN); | |
1010 | sm->alt_snonce_valid = TRUE; | |
1011 | os_memcpy(sm->alt_replay_counter, | |
1012 | sm->key_replay[0].counter, | |
1013 | WPA_REPLAY_COUNTER_LEN); | |
1014 | goto continue_processing; | |
1015 | } | |
1016 | ||
1017 | if (msg == PAIRWISE_4 && sm->alt_snonce_valid && | |
1018 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING && | |
1019 | os_memcmp(key->replay_counter, sm->alt_replay_counter, | |
1020 | WPA_REPLAY_COUNTER_LEN) == 0) { | |
1021 | /* | |
1022 | * Supplicant may still be using the old SNonce since | |
1023 | * there was two EAPOL-Key 2/4 messages and they had | |
1024 | * different SNonce values. | |
1025 | */ | |
1026 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1027 | "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4"); | |
1028 | goto continue_processing; | |
1029 | } | |
1030 | ||
1031 | if (msg == PAIRWISE_2 && | |
1032 | wpa_replay_counter_valid(sm->prev_key_replay, | |
1033 | key->replay_counter) && | |
1034 | sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) { | |
1035 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1036 | "ignore retransmitted EAPOL-Key %s - " | |
1037 | "SNonce did not change", msgtxt); | |
1038 | } else { | |
1039 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1040 | "received EAPOL-Key %s with " | |
1041 | "unexpected replay counter", msgtxt); | |
1042 | } | |
1043 | for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) { | |
1044 | if (!sm->key_replay[i].valid) | |
1045 | break; | |
1046 | wpa_hexdump(MSG_DEBUG, "pending replay counter", | |
1047 | sm->key_replay[i].counter, | |
1048 | WPA_REPLAY_COUNTER_LEN); | |
1049 | } | |
1050 | wpa_hexdump(MSG_DEBUG, "received replay counter", | |
1051 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1052 | return; | |
1053 | } | |
1054 | ||
1055 | continue_processing: | |
1056 | switch (msg) { | |
1057 | case PAIRWISE_2: | |
1058 | if (sm->wpa_ptk_state != WPA_PTK_PTKSTART && | |
1059 | sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING && | |
1060 | (!sm->update_snonce || | |
1061 | sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) { | |
1062 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1063 | "received EAPOL-Key msg 2/4 in " | |
1064 | "invalid state (%d) - dropped", | |
1065 | sm->wpa_ptk_state); | |
1066 | return; | |
1067 | } | |
1068 | random_add_randomness(key->key_nonce, WPA_NONCE_LEN); | |
1069 | if (sm->group->reject_4way_hs_for_entropy) { | |
1070 | /* | |
1071 | * The system did not have enough entropy to generate | |
1072 | * strong random numbers. Reject the first 4-way | |
1073 | * handshake(s) and collect some entropy based on the | |
1074 | * information from it. Once enough entropy is | |
1075 | * available, the next atempt will trigger GMK/Key | |
1076 | * Counter update and the station will be allowed to | |
1077 | * continue. | |
1078 | */ | |
1079 | wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to " | |
1080 | "collect more entropy for random number " | |
1081 | "generation"); | |
1082 | random_mark_pool_ready(); | |
1083 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
1084 | return; | |
1085 | } | |
1086 | if (wpa_parse_kde_ies((u8 *) (key + 1), key_data_length, | |
1087 | &kde) < 0) { | |
1088 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1089 | "received EAPOL-Key msg 2/4 with " | |
1090 | "invalid Key Data contents"); | |
1091 | return; | |
1092 | } | |
1093 | if (kde.rsn_ie) { | |
1094 | eapol_key_ie = kde.rsn_ie; | |
1095 | eapol_key_ie_len = kde.rsn_ie_len; | |
1096 | } else if (kde.osen) { | |
1097 | eapol_key_ie = kde.osen; | |
1098 | eapol_key_ie_len = kde.osen_len; | |
1099 | } else { | |
1100 | eapol_key_ie = kde.wpa_ie; | |
1101 | eapol_key_ie_len = kde.wpa_ie_len; | |
1102 | } | |
1103 | ft = sm->wpa == WPA_VERSION_WPA2 && | |
1104 | wpa_key_mgmt_ft(sm->wpa_key_mgmt); | |
1105 | if (sm->wpa_ie == NULL || | |
1106 | wpa_compare_rsn_ie(ft, | |
1107 | sm->wpa_ie, sm->wpa_ie_len, | |
1108 | eapol_key_ie, eapol_key_ie_len)) { | |
1109 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1110 | "WPA IE from (Re)AssocReq did not " | |
1111 | "match with msg 2/4"); | |
1112 | if (sm->wpa_ie) { | |
1113 | wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq", | |
1114 | sm->wpa_ie, sm->wpa_ie_len); | |
1115 | } | |
1116 | wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4", | |
1117 | eapol_key_ie, eapol_key_ie_len); | |
1118 | /* MLME-DEAUTHENTICATE.request */ | |
1119 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
1120 | return; | |
1121 | } | |
1122 | #ifdef CONFIG_IEEE80211R | |
1123 | if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) { | |
1124 | wpa_sta_disconnect(wpa_auth, sm->addr); | |
1125 | return; | |
1126 | } | |
1127 | #endif /* CONFIG_IEEE80211R */ | |
1128 | #ifdef CONFIG_P2P | |
1129 | if (kde.ip_addr_req && kde.ip_addr_req[0] && | |
1130 | wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) { | |
1131 | int idx; | |
1132 | wpa_printf(MSG_DEBUG, "P2P: IP address requested in " | |
1133 | "EAPOL-Key exchange"); | |
1134 | idx = bitfield_get_first_zero(wpa_auth->ip_pool); | |
1135 | if (idx >= 0) { | |
1136 | u32 start = WPA_GET_BE32(wpa_auth->conf. | |
1137 | ip_addr_start); | |
1138 | bitfield_set(wpa_auth->ip_pool, idx); | |
1139 | WPA_PUT_BE32(sm->ip_addr, start + idx); | |
1140 | wpa_printf(MSG_DEBUG, "P2P: Assigned IP " | |
1141 | "address %u.%u.%u.%u to " MACSTR, | |
1142 | sm->ip_addr[0], sm->ip_addr[1], | |
1143 | sm->ip_addr[2], sm->ip_addr[3], | |
1144 | MAC2STR(sm->addr)); | |
1145 | } | |
1146 | } | |
1147 | #endif /* CONFIG_P2P */ | |
1148 | break; | |
1149 | case PAIRWISE_4: | |
1150 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING || | |
1151 | !sm->PTK_valid) { | |
1152 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1153 | "received EAPOL-Key msg 4/4 in " | |
1154 | "invalid state (%d) - dropped", | |
1155 | sm->wpa_ptk_state); | |
1156 | return; | |
1157 | } | |
1158 | break; | |
1159 | case GROUP_2: | |
1160 | if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING | |
1161 | || !sm->PTK_valid) { | |
1162 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO, | |
1163 | "received EAPOL-Key msg 2/2 in " | |
1164 | "invalid state (%d) - dropped", | |
1165 | sm->wpa_ptk_group_state); | |
1166 | return; | |
1167 | } | |
1168 | break; | |
1169 | #ifdef CONFIG_PEERKEY | |
1170 | case SMK_M1: | |
1171 | case SMK_M3: | |
1172 | case SMK_ERROR: | |
1173 | if (!wpa_auth->conf.peerkey) { | |
1174 | wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but " | |
1175 | "PeerKey use disabled - ignoring message"); | |
1176 | return; | |
1177 | } | |
1178 | if (!sm->PTK_valid) { | |
1179 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1180 | "received EAPOL-Key msg SMK in " | |
1181 | "invalid state - dropped"); | |
1182 | return; | |
1183 | } | |
1184 | break; | |
1185 | #else /* CONFIG_PEERKEY */ | |
1186 | case SMK_M1: | |
1187 | case SMK_M3: | |
1188 | case SMK_ERROR: | |
1189 | return; /* STSL disabled - ignore SMK messages */ | |
1190 | #endif /* CONFIG_PEERKEY */ | |
1191 | case REQUEST: | |
1192 | break; | |
1193 | } | |
1194 | ||
1195 | wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1196 | "received EAPOL-Key frame (%s)", msgtxt); | |
1197 | ||
1198 | if (key_info & WPA_KEY_INFO_ACK) { | |
1199 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1200 | "received invalid EAPOL-Key: Key Ack set"); | |
1201 | return; | |
1202 | } | |
1203 | ||
1204 | if (!(key_info & WPA_KEY_INFO_MIC)) { | |
1205 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1206 | "received invalid EAPOL-Key: Key MIC not set"); | |
1207 | return; | |
1208 | } | |
1209 | ||
1210 | sm->MICVerified = FALSE; | |
1211 | if (sm->PTK_valid && !sm->update_snonce) { | |
1212 | if (wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data, | |
1213 | data_len) && | |
1214 | (msg != PAIRWISE_4 || !sm->alt_snonce_valid || | |
1215 | wpa_try_alt_snonce(sm, data, data_len))) { | |
1216 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1217 | "received EAPOL-Key with invalid MIC"); | |
1218 | return; | |
1219 | } | |
1220 | sm->MICVerified = TRUE; | |
1221 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
1222 | sm->pending_1_of_4_timeout = 0; | |
1223 | } | |
1224 | ||
1225 | if (key_info & WPA_KEY_INFO_REQUEST) { | |
1226 | if (sm->MICVerified) { | |
1227 | sm->req_replay_counter_used = 1; | |
1228 | os_memcpy(sm->req_replay_counter, key->replay_counter, | |
1229 | WPA_REPLAY_COUNTER_LEN); | |
1230 | } else { | |
1231 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1232 | "received EAPOL-Key request with " | |
1233 | "invalid MIC"); | |
1234 | return; | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * TODO: should decrypt key data field if encryption was used; | |
1239 | * even though MAC address KDE is not normally encrypted, | |
1240 | * supplicant is allowed to encrypt it. | |
1241 | */ | |
1242 | if (msg == SMK_ERROR) { | |
1243 | #ifdef CONFIG_PEERKEY | |
1244 | wpa_smk_error(wpa_auth, sm, (const u8 *) (key + 1), | |
1245 | key_data_length); | |
1246 | #endif /* CONFIG_PEERKEY */ | |
1247 | return; | |
1248 | } else if (key_info & WPA_KEY_INFO_ERROR) { | |
1249 | if (wpa_receive_error_report( | |
1250 | wpa_auth, sm, | |
1251 | !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0) | |
1252 | return; /* STA entry was removed */ | |
1253 | } else if (key_info & WPA_KEY_INFO_KEY_TYPE) { | |
1254 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1255 | "received EAPOL-Key Request for new " | |
1256 | "4-Way Handshake"); | |
1257 | wpa_request_new_ptk(sm); | |
1258 | #ifdef CONFIG_PEERKEY | |
1259 | } else if (msg == SMK_M1) { | |
1260 | wpa_smk_m1(wpa_auth, sm, key, (const u8 *) (key + 1), | |
1261 | key_data_length); | |
1262 | #endif /* CONFIG_PEERKEY */ | |
1263 | } else if (key_data_length > 0 && | |
1264 | wpa_parse_kde_ies((const u8 *) (key + 1), | |
1265 | key_data_length, &kde) == 0 && | |
1266 | kde.mac_addr) { | |
1267 | } else { | |
1268 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1269 | "received EAPOL-Key Request for GTK " | |
1270 | "rekeying"); | |
1271 | eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL); | |
1272 | wpa_rekey_gtk(wpa_auth, NULL); | |
1273 | } | |
1274 | } else { | |
1275 | /* Do not allow the same key replay counter to be reused. */ | |
1276 | wpa_replay_counter_mark_invalid(sm->key_replay, | |
1277 | key->replay_counter); | |
1278 | ||
1279 | if (msg == PAIRWISE_2) { | |
1280 | /* | |
1281 | * Maintain a copy of the pending EAPOL-Key frames in | |
1282 | * case the EAPOL-Key frame was retransmitted. This is | |
1283 | * needed to allow EAPOL-Key msg 2/4 reply to another | |
1284 | * pending msg 1/4 to update the SNonce to work around | |
1285 | * unexpected supplicant behavior. | |
1286 | */ | |
1287 | os_memcpy(sm->prev_key_replay, sm->key_replay, | |
1288 | sizeof(sm->key_replay)); | |
1289 | } else { | |
1290 | os_memset(sm->prev_key_replay, 0, | |
1291 | sizeof(sm->prev_key_replay)); | |
1292 | } | |
1293 | ||
1294 | /* | |
1295 | * Make sure old valid counters are not accepted anymore and | |
1296 | * do not get copied again. | |
1297 | */ | |
1298 | wpa_replay_counter_mark_invalid(sm->key_replay, NULL); | |
1299 | } | |
1300 | ||
1301 | #ifdef CONFIG_PEERKEY | |
1302 | if (msg == SMK_M3) { | |
1303 | wpa_smk_m3(wpa_auth, sm, key, (const u8 *) (key + 1), | |
1304 | key_data_length); | |
1305 | return; | |
1306 | } | |
1307 | #endif /* CONFIG_PEERKEY */ | |
1308 | ||
1309 | os_free(sm->last_rx_eapol_key); | |
1310 | sm->last_rx_eapol_key = os_malloc(data_len); | |
1311 | if (sm->last_rx_eapol_key == NULL) | |
1312 | return; | |
1313 | os_memcpy(sm->last_rx_eapol_key, data, data_len); | |
1314 | sm->last_rx_eapol_key_len = data_len; | |
1315 | ||
1316 | sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE); | |
1317 | sm->EAPOLKeyReceived = TRUE; | |
1318 | sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1319 | sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST); | |
1320 | os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN); | |
1321 | wpa_sm_step(sm); | |
1322 | } | |
1323 | ||
1324 | ||
1325 | static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr, | |
1326 | const u8 *gnonce, u8 *gtk, size_t gtk_len) | |
1327 | { | |
1328 | u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16]; | |
1329 | u8 *pos; | |
1330 | int ret = 0; | |
1331 | ||
1332 | /* GTK = PRF-X(GMK, "Group key expansion", | |
1333 | * AA || GNonce || Time || random data) | |
1334 | * The example described in the IEEE 802.11 standard uses only AA and | |
1335 | * GNonce as inputs here. Add some more entropy since this derivation | |
1336 | * is done only at the Authenticator and as such, does not need to be | |
1337 | * exactly same. | |
1338 | */ | |
1339 | os_memcpy(data, addr, ETH_ALEN); | |
1340 | os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN); | |
1341 | pos = data + ETH_ALEN + WPA_NONCE_LEN; | |
1342 | wpa_get_ntp_timestamp(pos); | |
1343 | pos += 8; | |
1344 | if (random_get_bytes(pos, 16) < 0) | |
1345 | ret = -1; | |
1346 | ||
1347 | #ifdef CONFIG_IEEE80211W | |
1348 | sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len); | |
1349 | #else /* CONFIG_IEEE80211W */ | |
1350 | if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len) | |
1351 | < 0) | |
1352 | ret = -1; | |
1353 | #endif /* CONFIG_IEEE80211W */ | |
1354 | ||
1355 | return ret; | |
1356 | } | |
1357 | ||
1358 | ||
1359 | static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx) | |
1360 | { | |
1361 | struct wpa_authenticator *wpa_auth = eloop_ctx; | |
1362 | struct wpa_state_machine *sm = timeout_ctx; | |
1363 | ||
1364 | sm->pending_1_of_4_timeout = 0; | |
1365 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout"); | |
1366 | sm->TimeoutEvt = TRUE; | |
1367 | wpa_sm_step(sm); | |
1368 | } | |
1369 | ||
1370 | ||
1371 | void __wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1372 | struct wpa_state_machine *sm, int key_info, | |
1373 | const u8 *key_rsc, const u8 *nonce, | |
1374 | const u8 *kde, size_t kde_len, | |
1375 | int keyidx, int encr, int force_version) | |
1376 | { | |
1377 | struct ieee802_1x_hdr *hdr; | |
1378 | struct wpa_eapol_key *key; | |
1379 | size_t len; | |
1380 | int alg; | |
1381 | int key_data_len, pad_len = 0; | |
1382 | u8 *buf, *pos; | |
1383 | int version, pairwise; | |
1384 | int i; | |
1385 | ||
1386 | len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key); | |
1387 | ||
1388 | if (force_version) | |
1389 | version = force_version; | |
1390 | else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN || | |
1391 | wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) | |
1392 | version = WPA_KEY_INFO_TYPE_AKM_DEFINED; | |
1393 | else if (wpa_use_aes_cmac(sm)) | |
1394 | version = WPA_KEY_INFO_TYPE_AES_128_CMAC; | |
1395 | else if (sm->pairwise != WPA_CIPHER_TKIP) | |
1396 | version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; | |
1397 | else | |
1398 | version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; | |
1399 | ||
1400 | pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE); | |
1401 | ||
1402 | wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d " | |
1403 | "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d " | |
1404 | "encr=%d)", | |
1405 | version, | |
1406 | (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0, | |
1407 | (key_info & WPA_KEY_INFO_MIC) ? 1 : 0, | |
1408 | (key_info & WPA_KEY_INFO_ACK) ? 1 : 0, | |
1409 | (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0, | |
1410 | pairwise, (unsigned long) kde_len, keyidx, encr); | |
1411 | ||
1412 | key_data_len = kde_len; | |
1413 | ||
1414 | if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
1415 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN || | |
1416 | wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) || | |
1417 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) { | |
1418 | pad_len = key_data_len % 8; | |
1419 | if (pad_len) | |
1420 | pad_len = 8 - pad_len; | |
1421 | key_data_len += pad_len + 8; | |
1422 | } | |
1423 | ||
1424 | len += key_data_len; | |
1425 | ||
1426 | hdr = os_zalloc(len); | |
1427 | if (hdr == NULL) | |
1428 | return; | |
1429 | hdr->version = wpa_auth->conf.eapol_version; | |
1430 | hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; | |
1431 | hdr->length = host_to_be16(len - sizeof(*hdr)); | |
1432 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1433 | ||
1434 | key->type = sm->wpa == WPA_VERSION_WPA2 ? | |
1435 | EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; | |
1436 | key_info |= version; | |
1437 | if (encr && sm->wpa == WPA_VERSION_WPA2) | |
1438 | key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; | |
1439 | if (sm->wpa != WPA_VERSION_WPA2) | |
1440 | key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT; | |
1441 | WPA_PUT_BE16(key->key_info, key_info); | |
1442 | ||
1443 | alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group; | |
1444 | WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg)); | |
1445 | if (key_info & WPA_KEY_INFO_SMK_MESSAGE) | |
1446 | WPA_PUT_BE16(key->key_length, 0); | |
1447 | ||
1448 | /* FIX: STSL: what to use as key_replay_counter? */ | |
1449 | for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) { | |
1450 | sm->key_replay[i].valid = sm->key_replay[i - 1].valid; | |
1451 | os_memcpy(sm->key_replay[i].counter, | |
1452 | sm->key_replay[i - 1].counter, | |
1453 | WPA_REPLAY_COUNTER_LEN); | |
1454 | } | |
1455 | inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN); | |
1456 | os_memcpy(key->replay_counter, sm->key_replay[0].counter, | |
1457 | WPA_REPLAY_COUNTER_LEN); | |
1458 | wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", | |
1459 | key->replay_counter, WPA_REPLAY_COUNTER_LEN); | |
1460 | sm->key_replay[0].valid = TRUE; | |
1461 | ||
1462 | if (nonce) | |
1463 | os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN); | |
1464 | ||
1465 | if (key_rsc) | |
1466 | os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN); | |
1467 | ||
1468 | if (kde && !encr) { | |
1469 | os_memcpy(key + 1, kde, kde_len); | |
1470 | WPA_PUT_BE16(key->key_data_length, kde_len); | |
1471 | } else if (encr && kde) { | |
1472 | buf = os_zalloc(key_data_len); | |
1473 | if (buf == NULL) { | |
1474 | os_free(hdr); | |
1475 | return; | |
1476 | } | |
1477 | pos = buf; | |
1478 | os_memcpy(pos, kde, kde_len); | |
1479 | pos += kde_len; | |
1480 | ||
1481 | if (pad_len) | |
1482 | *pos++ = 0xdd; | |
1483 | ||
1484 | wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data", | |
1485 | buf, key_data_len); | |
1486 | if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || | |
1487 | sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN || | |
1488 | wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) || | |
1489 | version == WPA_KEY_INFO_TYPE_AES_128_CMAC) { | |
1490 | if (aes_wrap(sm->PTK.kek, 16, | |
1491 | (key_data_len - 8) / 8, buf, | |
1492 | (u8 *) (key + 1))) { | |
1493 | os_free(hdr); | |
1494 | os_free(buf); | |
1495 | return; | |
1496 | } | |
1497 | WPA_PUT_BE16(key->key_data_length, key_data_len); | |
1498 | } else { | |
1499 | u8 ek[32]; | |
1500 | os_memcpy(key->key_iv, | |
1501 | sm->group->Counter + WPA_NONCE_LEN - 16, 16); | |
1502 | inc_byte_array(sm->group->Counter, WPA_NONCE_LEN); | |
1503 | os_memcpy(ek, key->key_iv, 16); | |
1504 | os_memcpy(ek + 16, sm->PTK.kek, 16); | |
1505 | os_memcpy(key + 1, buf, key_data_len); | |
1506 | rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len); | |
1507 | WPA_PUT_BE16(key->key_data_length, key_data_len); | |
1508 | } | |
1509 | os_free(buf); | |
1510 | } | |
1511 | ||
1512 | if (key_info & WPA_KEY_INFO_MIC) { | |
1513 | if (!sm->PTK_valid) { | |
1514 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
1515 | "PTK not valid when sending EAPOL-Key " | |
1516 | "frame"); | |
1517 | os_free(hdr); | |
1518 | return; | |
1519 | } | |
1520 | wpa_eapol_key_mic(sm->PTK.kck, sm->wpa_key_mgmt, version, | |
1521 | (u8 *) hdr, len, key->key_mic); | |
1522 | #ifdef CONFIG_TESTING_OPTIONS | |
1523 | if (!pairwise && | |
1524 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 && | |
1525 | drand48() < | |
1526 | wpa_auth->conf.corrupt_gtk_rekey_mic_probability) { | |
1527 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO, | |
1528 | "Corrupting group EAPOL-Key Key MIC"); | |
1529 | key->key_mic[0]++; | |
1530 | } | |
1531 | #endif /* CONFIG_TESTING_OPTIONS */ | |
1532 | } | |
1533 | ||
1534 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx, | |
1535 | 1); | |
1536 | wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len, | |
1537 | sm->pairwise_set); | |
1538 | os_free(hdr); | |
1539 | } | |
1540 | ||
1541 | ||
1542 | static void wpa_send_eapol(struct wpa_authenticator *wpa_auth, | |
1543 | struct wpa_state_machine *sm, int key_info, | |
1544 | const u8 *key_rsc, const u8 *nonce, | |
1545 | const u8 *kde, size_t kde_len, | |
1546 | int keyidx, int encr) | |
1547 | { | |
1548 | int timeout_ms; | |
1549 | int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE; | |
1550 | int ctr; | |
1551 | ||
1552 | if (sm == NULL) | |
1553 | return; | |
1554 | ||
1555 | __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len, | |
1556 | keyidx, encr, 0); | |
1557 | ||
1558 | ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr; | |
1559 | if (ctr == 1 && wpa_auth->conf.tx_status) | |
1560 | timeout_ms = pairwise ? eapol_key_timeout_first : | |
1561 | eapol_key_timeout_first_group; | |
1562 | else | |
1563 | timeout_ms = eapol_key_timeout_subseq; | |
1564 | if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC)) | |
1565 | sm->pending_1_of_4_timeout = 1; | |
1566 | wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry " | |
1567 | "counter %d)", timeout_ms, ctr); | |
1568 | eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000, | |
1569 | wpa_send_eapol_timeout, wpa_auth, sm); | |
1570 | } | |
1571 | ||
1572 | ||
1573 | static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data, | |
1574 | size_t data_len) | |
1575 | { | |
1576 | struct ieee802_1x_hdr *hdr; | |
1577 | struct wpa_eapol_key *key; | |
1578 | u16 key_info; | |
1579 | int ret = 0; | |
1580 | u8 mic[16]; | |
1581 | ||
1582 | if (data_len < sizeof(*hdr) + sizeof(*key)) | |
1583 | return -1; | |
1584 | ||
1585 | hdr = (struct ieee802_1x_hdr *) data; | |
1586 | key = (struct wpa_eapol_key *) (hdr + 1); | |
1587 | key_info = WPA_GET_BE16(key->key_info); | |
1588 | os_memcpy(mic, key->key_mic, 16); | |
1589 | os_memset(key->key_mic, 0, 16); | |
1590 | if (wpa_eapol_key_mic(PTK->kck, akmp, key_info & WPA_KEY_INFO_TYPE_MASK, | |
1591 | data, data_len, key->key_mic) || | |
1592 | os_memcmp_const(mic, key->key_mic, 16) != 0) | |
1593 | ret = -1; | |
1594 | os_memcpy(key->key_mic, mic, 16); | |
1595 | return ret; | |
1596 | } | |
1597 | ||
1598 | ||
1599 | void wpa_remove_ptk(struct wpa_state_machine *sm) | |
1600 | { | |
1601 | sm->PTK_valid = FALSE; | |
1602 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1603 | wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0); | |
1604 | sm->pairwise_set = FALSE; | |
1605 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
1606 | } | |
1607 | ||
1608 | ||
1609 | int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event) | |
1610 | { | |
1611 | int remove_ptk = 1; | |
1612 | ||
1613 | if (sm == NULL) | |
1614 | return -1; | |
1615 | ||
1616 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1617 | "event %d notification", event); | |
1618 | ||
1619 | switch (event) { | |
1620 | case WPA_AUTH: | |
1621 | #ifdef CONFIG_MESH | |
1622 | /* PTKs are derived through AMPE */ | |
1623 | if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) { | |
1624 | /* not mesh */ | |
1625 | break; | |
1626 | } | |
1627 | return 0; | |
1628 | #endif /* CONFIG_MESH */ | |
1629 | case WPA_ASSOC: | |
1630 | break; | |
1631 | case WPA_DEAUTH: | |
1632 | case WPA_DISASSOC: | |
1633 | sm->DeauthenticationRequest = TRUE; | |
1634 | break; | |
1635 | case WPA_REAUTH: | |
1636 | case WPA_REAUTH_EAPOL: | |
1637 | if (!sm->started) { | |
1638 | /* | |
1639 | * When using WPS, we may end up here if the STA | |
1640 | * manages to re-associate without the previous STA | |
1641 | * entry getting removed. Consequently, we need to make | |
1642 | * sure that the WPA state machines gets initialized | |
1643 | * properly at this point. | |
1644 | */ | |
1645 | wpa_printf(MSG_DEBUG, "WPA state machine had not been " | |
1646 | "started - initialize now"); | |
1647 | sm->started = 1; | |
1648 | sm->Init = TRUE; | |
1649 | if (wpa_sm_step(sm) == 1) | |
1650 | return 1; /* should not really happen */ | |
1651 | sm->Init = FALSE; | |
1652 | sm->AuthenticationRequest = TRUE; | |
1653 | break; | |
1654 | } | |
1655 | if (sm->GUpdateStationKeys) { | |
1656 | /* | |
1657 | * Reauthentication cancels the pending group key | |
1658 | * update for this STA. | |
1659 | */ | |
1660 | sm->group->GKeyDoneStations--; | |
1661 | sm->GUpdateStationKeys = FALSE; | |
1662 | sm->PtkGroupInit = TRUE; | |
1663 | } | |
1664 | sm->ReAuthenticationRequest = TRUE; | |
1665 | break; | |
1666 | case WPA_ASSOC_FT: | |
1667 | #ifdef CONFIG_IEEE80211R | |
1668 | wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration " | |
1669 | "after association"); | |
1670 | wpa_ft_install_ptk(sm); | |
1671 | ||
1672 | /* Using FT protocol, not WPA auth state machine */ | |
1673 | sm->ft_completed = 1; | |
1674 | return 0; | |
1675 | #else /* CONFIG_IEEE80211R */ | |
1676 | break; | |
1677 | #endif /* CONFIG_IEEE80211R */ | |
1678 | } | |
1679 | ||
1680 | #ifdef CONFIG_IEEE80211R | |
1681 | sm->ft_completed = 0; | |
1682 | #endif /* CONFIG_IEEE80211R */ | |
1683 | ||
1684 | #ifdef CONFIG_IEEE80211W | |
1685 | if (sm->mgmt_frame_prot && event == WPA_AUTH) | |
1686 | remove_ptk = 0; | |
1687 | #endif /* CONFIG_IEEE80211W */ | |
1688 | ||
1689 | if (remove_ptk) { | |
1690 | sm->PTK_valid = FALSE; | |
1691 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1692 | ||
1693 | if (event != WPA_REAUTH_EAPOL) | |
1694 | wpa_remove_ptk(sm); | |
1695 | } | |
1696 | ||
1697 | return wpa_sm_step(sm); | |
1698 | } | |
1699 | ||
1700 | ||
1701 | SM_STATE(WPA_PTK, INITIALIZE) | |
1702 | { | |
1703 | SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk); | |
1704 | if (sm->Init) { | |
1705 | /* Init flag is not cleared here, so avoid busy | |
1706 | * loop by claiming nothing changed. */ | |
1707 | sm->changed = FALSE; | |
1708 | } | |
1709 | ||
1710 | sm->keycount = 0; | |
1711 | if (sm->GUpdateStationKeys) | |
1712 | sm->group->GKeyDoneStations--; | |
1713 | sm->GUpdateStationKeys = FALSE; | |
1714 | if (sm->wpa == WPA_VERSION_WPA) | |
1715 | sm->PInitAKeys = FALSE; | |
1716 | if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and | |
1717 | * Local AA > Remote AA)) */) { | |
1718 | sm->Pair = TRUE; | |
1719 | } | |
1720 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0); | |
1721 | wpa_remove_ptk(sm); | |
1722 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0); | |
1723 | sm->TimeoutCtr = 0; | |
1724 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { | |
1725 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
1726 | WPA_EAPOL_authorized, 0); | |
1727 | } | |
1728 | } | |
1729 | ||
1730 | ||
1731 | SM_STATE(WPA_PTK, DISCONNECT) | |
1732 | { | |
1733 | SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk); | |
1734 | sm->Disconnect = FALSE; | |
1735 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
1736 | } | |
1737 | ||
1738 | ||
1739 | SM_STATE(WPA_PTK, DISCONNECTED) | |
1740 | { | |
1741 | SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk); | |
1742 | sm->DeauthenticationRequest = FALSE; | |
1743 | } | |
1744 | ||
1745 | ||
1746 | SM_STATE(WPA_PTK, AUTHENTICATION) | |
1747 | { | |
1748 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk); | |
1749 | os_memset(&sm->PTK, 0, sizeof(sm->PTK)); | |
1750 | sm->PTK_valid = FALSE; | |
1751 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto, | |
1752 | 1); | |
1753 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1); | |
1754 | sm->AuthenticationRequest = FALSE; | |
1755 | } | |
1756 | ||
1757 | ||
1758 | static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth, | |
1759 | struct wpa_group *group) | |
1760 | { | |
1761 | if (group->first_sta_seen) | |
1762 | return; | |
1763 | /* | |
1764 | * System has run bit further than at the time hostapd was started | |
1765 | * potentially very early during boot up. This provides better chances | |
1766 | * of collecting more randomness on embedded systems. Re-initialize the | |
1767 | * GMK and Counter here to improve their strength if there was not | |
1768 | * enough entropy available immediately after system startup. | |
1769 | */ | |
1770 | wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first " | |
1771 | "station"); | |
1772 | if (random_pool_ready() != 1) { | |
1773 | wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool " | |
1774 | "to proceed - reject first 4-way handshake"); | |
1775 | group->reject_4way_hs_for_entropy = TRUE; | |
1776 | } else { | |
1777 | group->first_sta_seen = TRUE; | |
1778 | group->reject_4way_hs_for_entropy = FALSE; | |
1779 | } | |
1780 | ||
1781 | wpa_group_init_gmk_and_counter(wpa_auth, group); | |
1782 | wpa_gtk_update(wpa_auth, group); | |
1783 | wpa_group_config_group_keys(wpa_auth, group); | |
1784 | } | |
1785 | ||
1786 | ||
1787 | SM_STATE(WPA_PTK, AUTHENTICATION2) | |
1788 | { | |
1789 | SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk); | |
1790 | ||
1791 | wpa_group_ensure_init(sm->wpa_auth, sm->group); | |
1792 | sm->ReAuthenticationRequest = FALSE; | |
1793 | ||
1794 | /* | |
1795 | * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat | |
1796 | * ambiguous. The Authenticator state machine uses a counter that is | |
1797 | * incremented by one for each 4-way handshake. However, the security | |
1798 | * analysis of 4-way handshake points out that unpredictable nonces | |
1799 | * help in preventing precomputation attacks. Instead of the state | |
1800 | * machine definition, use an unpredictable nonce value here to provide | |
1801 | * stronger protection against potential precomputation attacks. | |
1802 | */ | |
1803 | if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) { | |
1804 | wpa_printf(MSG_ERROR, "WPA: Failed to get random data for " | |
1805 | "ANonce."); | |
1806 | sm->Disconnect = TRUE; | |
1807 | return; | |
1808 | } | |
1809 | wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce, | |
1810 | WPA_NONCE_LEN); | |
1811 | /* IEEE 802.11i does not clear TimeoutCtr here, but this is more | |
1812 | * logical place than INITIALIZE since AUTHENTICATION2 can be | |
1813 | * re-entered on ReAuthenticationRequest without going through | |
1814 | * INITIALIZE. */ | |
1815 | sm->TimeoutCtr = 0; | |
1816 | } | |
1817 | ||
1818 | ||
1819 | SM_STATE(WPA_PTK, INITPMK) | |
1820 | { | |
1821 | u8 msk[2 * PMK_LEN]; | |
1822 | size_t len = 2 * PMK_LEN; | |
1823 | ||
1824 | SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk); | |
1825 | #ifdef CONFIG_IEEE80211R | |
1826 | sm->xxkey_len = 0; | |
1827 | #endif /* CONFIG_IEEE80211R */ | |
1828 | if (sm->pmksa) { | |
1829 | wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache"); | |
1830 | os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN); | |
1831 | } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) { | |
1832 | wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine " | |
1833 | "(len=%lu)", (unsigned long) len); | |
1834 | os_memcpy(sm->PMK, msk, PMK_LEN); | |
1835 | #ifdef CONFIG_IEEE80211R | |
1836 | if (len >= 2 * PMK_LEN) { | |
1837 | os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN); | |
1838 | sm->xxkey_len = PMK_LEN; | |
1839 | } | |
1840 | #endif /* CONFIG_IEEE80211R */ | |
1841 | } else { | |
1842 | wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p", | |
1843 | sm->wpa_auth->cb.get_msk); | |
1844 | } | |
1845 | ||
1846 | sm->req_replay_counter_used = 0; | |
1847 | /* IEEE 802.11i does not set keyRun to FALSE, but not doing this | |
1848 | * will break reauthentication since EAPOL state machines may not be | |
1849 | * get into AUTHENTICATING state that clears keyRun before WPA state | |
1850 | * machine enters AUTHENTICATION2 state and goes immediately to INITPMK | |
1851 | * state and takes PMK from the previously used AAA Key. This will | |
1852 | * eventually fail in 4-Way Handshake because Supplicant uses PMK | |
1853 | * derived from the new AAA Key. Setting keyRun = FALSE here seems to | |
1854 | * be good workaround for this issue. */ | |
1855 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0); | |
1856 | } | |
1857 | ||
1858 | ||
1859 | SM_STATE(WPA_PTK, INITPSK) | |
1860 | { | |
1861 | const u8 *psk; | |
1862 | SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk); | |
1863 | psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL); | |
1864 | if (psk) { | |
1865 | os_memcpy(sm->PMK, psk, PMK_LEN); | |
1866 | #ifdef CONFIG_IEEE80211R | |
1867 | os_memcpy(sm->xxkey, psk, PMK_LEN); | |
1868 | sm->xxkey_len = PMK_LEN; | |
1869 | #endif /* CONFIG_IEEE80211R */ | |
1870 | } | |
1871 | sm->req_replay_counter_used = 0; | |
1872 | } | |
1873 | ||
1874 | ||
1875 | SM_STATE(WPA_PTK, PTKSTART) | |
1876 | { | |
1877 | u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL; | |
1878 | size_t pmkid_len = 0; | |
1879 | ||
1880 | SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk); | |
1881 | sm->PTKRequest = FALSE; | |
1882 | sm->TimeoutEvt = FALSE; | |
1883 | sm->alt_snonce_valid = FALSE; | |
1884 | ||
1885 | sm->TimeoutCtr++; | |
1886 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
1887 | /* No point in sending the EAPOL-Key - we will disconnect | |
1888 | * immediately following this. */ | |
1889 | return; | |
1890 | } | |
1891 | ||
1892 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1893 | "sending 1/4 msg of 4-Way Handshake"); | |
1894 | /* | |
1895 | * TODO: Could add PMKID even with WPA2-PSK, but only if there is only | |
1896 | * one possible PSK for this STA. | |
1897 | */ | |
1898 | if (sm->wpa == WPA_VERSION_WPA2 && | |
1899 | wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && | |
1900 | sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) { | |
1901 | pmkid = buf; | |
1902 | pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN; | |
1903 | pmkid[0] = WLAN_EID_VENDOR_SPECIFIC; | |
1904 | pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN; | |
1905 | RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID); | |
1906 | if (sm->pmksa) { | |
1907 | os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN], | |
1908 | sm->pmksa->pmkid, PMKID_LEN); | |
1909 | } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) { | |
1910 | /* No KCK available to derive PMKID */ | |
1911 | pmkid = NULL; | |
1912 | } else { | |
1913 | /* | |
1914 | * Calculate PMKID since no PMKSA cache entry was | |
1915 | * available with pre-calculated PMKID. | |
1916 | */ | |
1917 | rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr, | |
1918 | sm->addr, &pmkid[2 + RSN_SELECTOR_LEN], | |
1919 | wpa_key_mgmt_sha256(sm->wpa_key_mgmt)); | |
1920 | } | |
1921 | } | |
1922 | wpa_send_eapol(sm->wpa_auth, sm, | |
1923 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL, | |
1924 | sm->ANonce, pmkid, pmkid_len, 0, 0); | |
1925 | } | |
1926 | ||
1927 | ||
1928 | static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce, | |
1929 | const u8 *pmk, struct wpa_ptk *ptk) | |
1930 | { | |
1931 | size_t ptk_len = wpa_cipher_key_len(sm->pairwise) + 32; | |
1932 | #ifdef CONFIG_IEEE80211R | |
1933 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) | |
1934 | return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len); | |
1935 | #endif /* CONFIG_IEEE80211R */ | |
1936 | ||
1937 | wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion", | |
1938 | sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce, | |
1939 | (u8 *) ptk, ptk_len, | |
1940 | wpa_key_mgmt_sha256(sm->wpa_key_mgmt)); | |
1941 | ||
1942 | return 0; | |
1943 | } | |
1944 | ||
1945 | ||
1946 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING) | |
1947 | { | |
1948 | struct wpa_ptk PTK; | |
1949 | int ok = 0; | |
1950 | const u8 *pmk = NULL; | |
1951 | ||
1952 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk); | |
1953 | sm->EAPOLKeyReceived = FALSE; | |
1954 | sm->update_snonce = FALSE; | |
1955 | ||
1956 | /* WPA with IEEE 802.1X: use the derived PMK from EAP | |
1957 | * WPA-PSK: iterate through possible PSKs and select the one matching | |
1958 | * the packet */ | |
1959 | for (;;) { | |
1960 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { | |
1961 | pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, | |
1962 | sm->p2p_dev_addr, pmk); | |
1963 | if (pmk == NULL) | |
1964 | break; | |
1965 | } else | |
1966 | pmk = sm->PMK; | |
1967 | ||
1968 | wpa_derive_ptk(sm, sm->SNonce, pmk, &PTK); | |
1969 | ||
1970 | if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, | |
1971 | sm->last_rx_eapol_key, | |
1972 | sm->last_rx_eapol_key_len) == 0) { | |
1973 | ok = 1; | |
1974 | break; | |
1975 | } | |
1976 | ||
1977 | if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) | |
1978 | break; | |
1979 | } | |
1980 | ||
1981 | if (!ok) { | |
1982 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1983 | "invalid MIC in msg 2/4 of 4-Way Handshake"); | |
1984 | return; | |
1985 | } | |
1986 | ||
1987 | #ifdef CONFIG_IEEE80211R | |
1988 | if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
1989 | /* | |
1990 | * Verify that PMKR1Name from EAPOL-Key message 2/4 matches | |
1991 | * with the value we derived. | |
1992 | */ | |
1993 | if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name, | |
1994 | WPA_PMK_NAME_LEN) != 0) { | |
1995 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
1996 | "PMKR1Name mismatch in FT 4-way " | |
1997 | "handshake"); | |
1998 | wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from " | |
1999 | "Supplicant", | |
2000 | sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN); | |
2001 | wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", | |
2002 | sm->pmk_r1_name, WPA_PMK_NAME_LEN); | |
2003 | return; | |
2004 | } | |
2005 | } | |
2006 | #endif /* CONFIG_IEEE80211R */ | |
2007 | ||
2008 | sm->pending_1_of_4_timeout = 0; | |
2009 | eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm); | |
2010 | ||
2011 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { | |
2012 | /* PSK may have changed from the previous choice, so update | |
2013 | * state machine data based on whatever PSK was selected here. | |
2014 | */ | |
2015 | os_memcpy(sm->PMK, pmk, PMK_LEN); | |
2016 | } | |
2017 | ||
2018 | sm->MICVerified = TRUE; | |
2019 | ||
2020 | os_memcpy(&sm->PTK, &PTK, sizeof(PTK)); | |
2021 | sm->PTK_valid = TRUE; | |
2022 | } | |
2023 | ||
2024 | ||
2025 | SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2) | |
2026 | { | |
2027 | SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk); | |
2028 | sm->TimeoutCtr = 0; | |
2029 | } | |
2030 | ||
2031 | ||
2032 | #ifdef CONFIG_IEEE80211W | |
2033 | ||
2034 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
2035 | { | |
2036 | if (sm->mgmt_frame_prot) { | |
2037 | size_t len; | |
2038 | len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
2039 | return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len; | |
2040 | } | |
2041 | ||
2042 | return 0; | |
2043 | } | |
2044 | ||
2045 | ||
2046 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
2047 | { | |
2048 | struct wpa_igtk_kde igtk; | |
2049 | struct wpa_group *gsm = sm->group; | |
2050 | u8 rsc[WPA_KEY_RSC_LEN]; | |
2051 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
2052 | ||
2053 | if (!sm->mgmt_frame_prot) | |
2054 | return pos; | |
2055 | ||
2056 | igtk.keyid[0] = gsm->GN_igtk; | |
2057 | igtk.keyid[1] = 0; | |
2058 | if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE || | |
2059 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0) | |
2060 | os_memset(igtk.pn, 0, sizeof(igtk.pn)); | |
2061 | else | |
2062 | os_memcpy(igtk.pn, rsc, sizeof(igtk.pn)); | |
2063 | os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len); | |
2064 | if (sm->wpa_auth->conf.disable_gtk) { | |
2065 | /* | |
2066 | * Provide unique random IGTK to each STA to prevent use of | |
2067 | * IGTK in the BSS. | |
2068 | */ | |
2069 | if (random_get_bytes(igtk.igtk, len) < 0) | |
2070 | return pos; | |
2071 | } | |
2072 | pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK, | |
2073 | (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len, | |
2074 | NULL, 0); | |
2075 | ||
2076 | return pos; | |
2077 | } | |
2078 | ||
2079 | #else /* CONFIG_IEEE80211W */ | |
2080 | ||
2081 | static int ieee80211w_kde_len(struct wpa_state_machine *sm) | |
2082 | { | |
2083 | return 0; | |
2084 | } | |
2085 | ||
2086 | ||
2087 | static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos) | |
2088 | { | |
2089 | return pos; | |
2090 | } | |
2091 | ||
2092 | #endif /* CONFIG_IEEE80211W */ | |
2093 | ||
2094 | ||
2095 | SM_STATE(WPA_PTK, PTKINITNEGOTIATING) | |
2096 | { | |
2097 | u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32]; | |
2098 | size_t gtk_len, kde_len; | |
2099 | struct wpa_group *gsm = sm->group; | |
2100 | u8 *wpa_ie; | |
2101 | int wpa_ie_len, secure, keyidx, encr = 0; | |
2102 | ||
2103 | SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk); | |
2104 | sm->TimeoutEvt = FALSE; | |
2105 | ||
2106 | sm->TimeoutCtr++; | |
2107 | if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2108 | /* No point in sending the EAPOL-Key - we will disconnect | |
2109 | * immediately following this. */ | |
2110 | return; | |
2111 | } | |
2112 | ||
2113 | /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE], | |
2114 | GTK[GN], IGTK, [FTIE], [TIE * 2]) | |
2115 | */ | |
2116 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
2117 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
2118 | /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */ | |
2119 | wpa_ie = sm->wpa_auth->wpa_ie; | |
2120 | wpa_ie_len = sm->wpa_auth->wpa_ie_len; | |
2121 | if (sm->wpa == WPA_VERSION_WPA && | |
2122 | (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) && | |
2123 | wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) { | |
2124 | /* WPA-only STA, remove RSN IE and possible MDIE */ | |
2125 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
2126 | if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN) | |
2127 | wpa_ie = wpa_ie + wpa_ie[1] + 2; | |
2128 | wpa_ie_len = wpa_ie[1] + 2; | |
2129 | } | |
2130 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2131 | "sending 3/4 msg of 4-Way Handshake"); | |
2132 | if (sm->wpa == WPA_VERSION_WPA2) { | |
2133 | /* WPA2 send GTK in the 4-way handshake */ | |
2134 | secure = 1; | |
2135 | gtk = gsm->GTK[gsm->GN - 1]; | |
2136 | gtk_len = gsm->GTK_len; | |
2137 | if (sm->wpa_auth->conf.disable_gtk) { | |
2138 | /* | |
2139 | * Provide unique random GTK to each STA to prevent use | |
2140 | * of GTK in the BSS. | |
2141 | */ | |
2142 | if (random_get_bytes(dummy_gtk, gtk_len) < 0) | |
2143 | return; | |
2144 | gtk = dummy_gtk; | |
2145 | } | |
2146 | keyidx = gsm->GN; | |
2147 | _rsc = rsc; | |
2148 | encr = 1; | |
2149 | } else { | |
2150 | /* WPA does not include GTK in msg 3/4 */ | |
2151 | secure = 0; | |
2152 | gtk = NULL; | |
2153 | gtk_len = 0; | |
2154 | keyidx = 0; | |
2155 | _rsc = NULL; | |
2156 | if (sm->rx_eapol_key_secure) { | |
2157 | /* | |
2158 | * It looks like Windows 7 supplicant tries to use | |
2159 | * Secure bit in msg 2/4 after having reported Michael | |
2160 | * MIC failure and it then rejects the 4-way handshake | |
2161 | * if msg 3/4 does not set Secure bit. Work around this | |
2162 | * by setting the Secure bit here even in the case of | |
2163 | * WPA if the supplicant used it first. | |
2164 | */ | |
2165 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2166 | "STA used Secure bit in WPA msg 2/4 - " | |
2167 | "set Secure for 3/4 as workaround"); | |
2168 | secure = 1; | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | kde_len = wpa_ie_len + ieee80211w_kde_len(sm); | |
2173 | if (gtk) | |
2174 | kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len; | |
2175 | #ifdef CONFIG_IEEE80211R | |
2176 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
2177 | kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */ | |
2178 | kde_len += 300; /* FTIE + 2 * TIE */ | |
2179 | } | |
2180 | #endif /* CONFIG_IEEE80211R */ | |
2181 | #ifdef CONFIG_P2P | |
2182 | if (WPA_GET_BE32(sm->ip_addr) > 0) | |
2183 | kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4; | |
2184 | #endif /* CONFIG_P2P */ | |
2185 | kde = os_malloc(kde_len); | |
2186 | if (kde == NULL) | |
2187 | return; | |
2188 | ||
2189 | pos = kde; | |
2190 | os_memcpy(pos, wpa_ie, wpa_ie_len); | |
2191 | pos += wpa_ie_len; | |
2192 | #ifdef CONFIG_IEEE80211R | |
2193 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
2194 | int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name); | |
2195 | if (res < 0) { | |
2196 | wpa_printf(MSG_ERROR, "FT: Failed to insert " | |
2197 | "PMKR1Name into RSN IE in EAPOL-Key data"); | |
2198 | os_free(kde); | |
2199 | return; | |
2200 | } | |
2201 | pos += res; | |
2202 | } | |
2203 | #endif /* CONFIG_IEEE80211R */ | |
2204 | if (gtk) { | |
2205 | u8 hdr[2]; | |
2206 | hdr[0] = keyidx & 0x03; | |
2207 | hdr[1] = 0; | |
2208 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2209 | gtk, gtk_len); | |
2210 | } | |
2211 | pos = ieee80211w_kde_add(sm, pos); | |
2212 | ||
2213 | #ifdef CONFIG_IEEE80211R | |
2214 | if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { | |
2215 | int res; | |
2216 | struct wpa_auth_config *conf; | |
2217 | ||
2218 | conf = &sm->wpa_auth->conf; | |
2219 | res = wpa_write_ftie(conf, conf->r0_key_holder, | |
2220 | conf->r0_key_holder_len, | |
2221 | NULL, NULL, pos, kde + kde_len - pos, | |
2222 | NULL, 0); | |
2223 | if (res < 0) { | |
2224 | wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE " | |
2225 | "into EAPOL-Key Key Data"); | |
2226 | os_free(kde); | |
2227 | return; | |
2228 | } | |
2229 | pos += res; | |
2230 | ||
2231 | /* TIE[ReassociationDeadline] (TU) */ | |
2232 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2233 | *pos++ = 5; | |
2234 | *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE; | |
2235 | WPA_PUT_LE32(pos, conf->reassociation_deadline); | |
2236 | pos += 4; | |
2237 | ||
2238 | /* TIE[KeyLifetime] (seconds) */ | |
2239 | *pos++ = WLAN_EID_TIMEOUT_INTERVAL; | |
2240 | *pos++ = 5; | |
2241 | *pos++ = WLAN_TIMEOUT_KEY_LIFETIME; | |
2242 | WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60); | |
2243 | pos += 4; | |
2244 | } | |
2245 | #endif /* CONFIG_IEEE80211R */ | |
2246 | #ifdef CONFIG_P2P | |
2247 | if (WPA_GET_BE32(sm->ip_addr) > 0) { | |
2248 | u8 addr[3 * 4]; | |
2249 | os_memcpy(addr, sm->ip_addr, 4); | |
2250 | os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4); | |
2251 | os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4); | |
2252 | pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC, | |
2253 | addr, sizeof(addr), NULL, 0); | |
2254 | } | |
2255 | #endif /* CONFIG_P2P */ | |
2256 | ||
2257 | wpa_send_eapol(sm->wpa_auth, sm, | |
2258 | (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC | | |
2259 | WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL | | |
2260 | WPA_KEY_INFO_KEY_TYPE, | |
2261 | _rsc, sm->ANonce, kde, pos - kde, keyidx, encr); | |
2262 | os_free(kde); | |
2263 | } | |
2264 | ||
2265 | ||
2266 | SM_STATE(WPA_PTK, PTKINITDONE) | |
2267 | { | |
2268 | SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk); | |
2269 | sm->EAPOLKeyReceived = FALSE; | |
2270 | if (sm->Pair) { | |
2271 | enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise); | |
2272 | int klen = wpa_cipher_key_len(sm->pairwise); | |
2273 | if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0, | |
2274 | sm->PTK.tk1, klen)) { | |
2275 | wpa_sta_disconnect(sm->wpa_auth, sm->addr); | |
2276 | return; | |
2277 | } | |
2278 | /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ | |
2279 | sm->pairwise_set = TRUE; | |
2280 | ||
2281 | if (sm->wpa_auth->conf.wpa_ptk_rekey) { | |
2282 | eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm); | |
2283 | eloop_register_timeout(sm->wpa_auth->conf. | |
2284 | wpa_ptk_rekey, 0, wpa_rekey_ptk, | |
2285 | sm->wpa_auth, sm); | |
2286 | } | |
2287 | ||
2288 | if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) { | |
2289 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
2290 | WPA_EAPOL_authorized, 1); | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | if (0 /* IBSS == TRUE */) { | |
2295 | sm->keycount++; | |
2296 | if (sm->keycount == 2) { | |
2297 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, | |
2298 | WPA_EAPOL_portValid, 1); | |
2299 | } | |
2300 | } else { | |
2301 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, | |
2302 | 1); | |
2303 | } | |
2304 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0); | |
2305 | wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1); | |
2306 | if (sm->wpa == WPA_VERSION_WPA) | |
2307 | sm->PInitAKeys = TRUE; | |
2308 | else | |
2309 | sm->has_GTK = TRUE; | |
2310 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2311 | "pairwise key handshake completed (%s)", | |
2312 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
2313 | ||
2314 | #ifdef CONFIG_IEEE80211R | |
2315 | wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr); | |
2316 | #endif /* CONFIG_IEEE80211R */ | |
2317 | } | |
2318 | ||
2319 | ||
2320 | SM_STEP(WPA_PTK) | |
2321 | { | |
2322 | struct wpa_authenticator *wpa_auth = sm->wpa_auth; | |
2323 | ||
2324 | if (sm->Init) | |
2325 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2326 | else if (sm->Disconnect | |
2327 | /* || FIX: dot11RSNAConfigSALifetime timeout */) { | |
2328 | wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, | |
2329 | "WPA_PTK: sm->Disconnect"); | |
2330 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2331 | } | |
2332 | else if (sm->DeauthenticationRequest) | |
2333 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2334 | else if (sm->AuthenticationRequest) | |
2335 | SM_ENTER(WPA_PTK, AUTHENTICATION); | |
2336 | else if (sm->ReAuthenticationRequest) | |
2337 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2338 | else if (sm->PTKRequest) | |
2339 | SM_ENTER(WPA_PTK, PTKSTART); | |
2340 | else switch (sm->wpa_ptk_state) { | |
2341 | case WPA_PTK_INITIALIZE: | |
2342 | break; | |
2343 | case WPA_PTK_DISCONNECT: | |
2344 | SM_ENTER(WPA_PTK, DISCONNECTED); | |
2345 | break; | |
2346 | case WPA_PTK_DISCONNECTED: | |
2347 | SM_ENTER(WPA_PTK, INITIALIZE); | |
2348 | break; | |
2349 | case WPA_PTK_AUTHENTICATION: | |
2350 | SM_ENTER(WPA_PTK, AUTHENTICATION2); | |
2351 | break; | |
2352 | case WPA_PTK_AUTHENTICATION2: | |
2353 | if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) && | |
2354 | wpa_auth_get_eapol(sm->wpa_auth, sm->addr, | |
2355 | WPA_EAPOL_keyRun) > 0) | |
2356 | SM_ENTER(WPA_PTK, INITPMK); | |
2357 | else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) | |
2358 | /* FIX: && 802.1X::keyRun */) | |
2359 | SM_ENTER(WPA_PTK, INITPSK); | |
2360 | break; | |
2361 | case WPA_PTK_INITPMK: | |
2362 | if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr, | |
2363 | WPA_EAPOL_keyAvailable) > 0) | |
2364 | SM_ENTER(WPA_PTK, PTKSTART); | |
2365 | else { | |
2366 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
2367 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2368 | "INITPMK - keyAvailable = false"); | |
2369 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2370 | } | |
2371 | break; | |
2372 | case WPA_PTK_INITPSK: | |
2373 | if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, | |
2374 | NULL)) | |
2375 | SM_ENTER(WPA_PTK, PTKSTART); | |
2376 | else { | |
2377 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2378 | "no PSK configured for the STA"); | |
2379 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
2380 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2381 | } | |
2382 | break; | |
2383 | case WPA_PTK_PTKSTART: | |
2384 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2385 | sm->EAPOLKeyPairwise) | |
2386 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2387 | else if (sm->TimeoutCtr > | |
2388 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2389 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
2390 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2391 | "PTKSTART: Retry limit %d reached", | |
2392 | dot11RSNAConfigPairwiseUpdateCount); | |
2393 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2394 | } else if (sm->TimeoutEvt) | |
2395 | SM_ENTER(WPA_PTK, PTKSTART); | |
2396 | break; | |
2397 | case WPA_PTK_PTKCALCNEGOTIATING: | |
2398 | if (sm->MICVerified) | |
2399 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2); | |
2400 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2401 | sm->EAPOLKeyPairwise) | |
2402 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2403 | else if (sm->TimeoutEvt) | |
2404 | SM_ENTER(WPA_PTK, PTKSTART); | |
2405 | break; | |
2406 | case WPA_PTK_PTKCALCNEGOTIATING2: | |
2407 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
2408 | break; | |
2409 | case WPA_PTK_PTKINITNEGOTIATING: | |
2410 | if (sm->update_snonce) | |
2411 | SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING); | |
2412 | else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2413 | sm->EAPOLKeyPairwise && sm->MICVerified) | |
2414 | SM_ENTER(WPA_PTK, PTKINITDONE); | |
2415 | else if (sm->TimeoutCtr > | |
2416 | (int) dot11RSNAConfigPairwiseUpdateCount) { | |
2417 | wpa_auth->dot11RSNA4WayHandshakeFailures++; | |
2418 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2419 | "PTKINITNEGOTIATING: Retry limit %d " | |
2420 | "reached", | |
2421 | dot11RSNAConfigPairwiseUpdateCount); | |
2422 | SM_ENTER(WPA_PTK, DISCONNECT); | |
2423 | } else if (sm->TimeoutEvt) | |
2424 | SM_ENTER(WPA_PTK, PTKINITNEGOTIATING); | |
2425 | break; | |
2426 | case WPA_PTK_PTKINITDONE: | |
2427 | break; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | ||
2432 | SM_STATE(WPA_PTK_GROUP, IDLE) | |
2433 | { | |
2434 | SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group); | |
2435 | if (sm->Init) { | |
2436 | /* Init flag is not cleared here, so avoid busy | |
2437 | * loop by claiming nothing changed. */ | |
2438 | sm->changed = FALSE; | |
2439 | } | |
2440 | sm->GTimeoutCtr = 0; | |
2441 | } | |
2442 | ||
2443 | ||
2444 | SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING) | |
2445 | { | |
2446 | u8 rsc[WPA_KEY_RSC_LEN]; | |
2447 | struct wpa_group *gsm = sm->group; | |
2448 | const u8 *kde; | |
2449 | u8 *kde_buf = NULL, *pos, hdr[2]; | |
2450 | size_t kde_len; | |
2451 | u8 *gtk, dummy_gtk[32]; | |
2452 | ||
2453 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group); | |
2454 | ||
2455 | sm->GTimeoutCtr++; | |
2456 | if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) { | |
2457 | /* No point in sending the EAPOL-Key - we will disconnect | |
2458 | * immediately following this. */ | |
2459 | return; | |
2460 | } | |
2461 | ||
2462 | if (sm->wpa == WPA_VERSION_WPA) | |
2463 | sm->PInitAKeys = FALSE; | |
2464 | sm->TimeoutEvt = FALSE; | |
2465 | /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */ | |
2466 | os_memset(rsc, 0, WPA_KEY_RSC_LEN); | |
2467 | if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE) | |
2468 | wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc); | |
2469 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2470 | "sending 1/2 msg of Group Key Handshake"); | |
2471 | ||
2472 | gtk = gsm->GTK[gsm->GN - 1]; | |
2473 | if (sm->wpa_auth->conf.disable_gtk) { | |
2474 | /* | |
2475 | * Provide unique random GTK to each STA to prevent use | |
2476 | * of GTK in the BSS. | |
2477 | */ | |
2478 | if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0) | |
2479 | return; | |
2480 | gtk = dummy_gtk; | |
2481 | } | |
2482 | if (sm->wpa == WPA_VERSION_WPA2) { | |
2483 | kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len + | |
2484 | ieee80211w_kde_len(sm); | |
2485 | kde_buf = os_malloc(kde_len); | |
2486 | if (kde_buf == NULL) | |
2487 | return; | |
2488 | ||
2489 | kde = pos = kde_buf; | |
2490 | hdr[0] = gsm->GN & 0x03; | |
2491 | hdr[1] = 0; | |
2492 | pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2, | |
2493 | gtk, gsm->GTK_len); | |
2494 | pos = ieee80211w_kde_add(sm, pos); | |
2495 | kde_len = pos - kde; | |
2496 | } else { | |
2497 | kde = gtk; | |
2498 | kde_len = gsm->GTK_len; | |
2499 | } | |
2500 | ||
2501 | wpa_send_eapol(sm->wpa_auth, sm, | |
2502 | WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC | | |
2503 | WPA_KEY_INFO_ACK | | |
2504 | (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0), | |
2505 | rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1); | |
2506 | ||
2507 | os_free(kde_buf); | |
2508 | } | |
2509 | ||
2510 | ||
2511 | SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED) | |
2512 | { | |
2513 | SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group); | |
2514 | sm->EAPOLKeyReceived = FALSE; | |
2515 | if (sm->GUpdateStationKeys) | |
2516 | sm->group->GKeyDoneStations--; | |
2517 | sm->GUpdateStationKeys = FALSE; | |
2518 | sm->GTimeoutCtr = 0; | |
2519 | /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */ | |
2520 | wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO, | |
2521 | "group key handshake completed (%s)", | |
2522 | sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN"); | |
2523 | sm->has_GTK = TRUE; | |
2524 | } | |
2525 | ||
2526 | ||
2527 | SM_STATE(WPA_PTK_GROUP, KEYERROR) | |
2528 | { | |
2529 | SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group); | |
2530 | if (sm->GUpdateStationKeys) | |
2531 | sm->group->GKeyDoneStations--; | |
2532 | sm->GUpdateStationKeys = FALSE; | |
2533 | sm->Disconnect = TRUE; | |
2534 | } | |
2535 | ||
2536 | ||
2537 | SM_STEP(WPA_PTK_GROUP) | |
2538 | { | |
2539 | if (sm->Init || sm->PtkGroupInit) { | |
2540 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
2541 | sm->PtkGroupInit = FALSE; | |
2542 | } else switch (sm->wpa_ptk_group_state) { | |
2543 | case WPA_PTK_GROUP_IDLE: | |
2544 | if (sm->GUpdateStationKeys || | |
2545 | (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys)) | |
2546 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
2547 | break; | |
2548 | case WPA_PTK_GROUP_REKEYNEGOTIATING: | |
2549 | if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest && | |
2550 | !sm->EAPOLKeyPairwise && sm->MICVerified) | |
2551 | SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED); | |
2552 | else if (sm->GTimeoutCtr > | |
2553 | (int) dot11RSNAConfigGroupUpdateCount) | |
2554 | SM_ENTER(WPA_PTK_GROUP, KEYERROR); | |
2555 | else if (sm->TimeoutEvt) | |
2556 | SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING); | |
2557 | break; | |
2558 | case WPA_PTK_GROUP_KEYERROR: | |
2559 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
2560 | break; | |
2561 | case WPA_PTK_GROUP_REKEYESTABLISHED: | |
2562 | SM_ENTER(WPA_PTK_GROUP, IDLE); | |
2563 | break; | |
2564 | } | |
2565 | } | |
2566 | ||
2567 | ||
2568 | static int wpa_gtk_update(struct wpa_authenticator *wpa_auth, | |
2569 | struct wpa_group *group) | |
2570 | { | |
2571 | int ret = 0; | |
2572 | ||
2573 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); | |
2574 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
2575 | if (wpa_gmk_to_gtk(group->GMK, "Group key expansion", | |
2576 | wpa_auth->addr, group->GNonce, | |
2577 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
2578 | ret = -1; | |
2579 | wpa_hexdump_key(MSG_DEBUG, "GTK", | |
2580 | group->GTK[group->GN - 1], group->GTK_len); | |
2581 | ||
2582 | #ifdef CONFIG_IEEE80211W | |
2583 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { | |
2584 | size_t len; | |
2585 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
2586 | os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN); | |
2587 | inc_byte_array(group->Counter, WPA_NONCE_LEN); | |
2588 | if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion", | |
2589 | wpa_auth->addr, group->GNonce, | |
2590 | group->IGTK[group->GN_igtk - 4], len) < 0) | |
2591 | ret = -1; | |
2592 | wpa_hexdump_key(MSG_DEBUG, "IGTK", | |
2593 | group->IGTK[group->GN_igtk - 4], len); | |
2594 | } | |
2595 | #endif /* CONFIG_IEEE80211W */ | |
2596 | ||
2597 | return ret; | |
2598 | } | |
2599 | ||
2600 | ||
2601 | static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth, | |
2602 | struct wpa_group *group) | |
2603 | { | |
2604 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2605 | "GTK_INIT (VLAN-ID %d)", group->vlan_id); | |
2606 | group->changed = FALSE; /* GInit is not cleared here; avoid loop */ | |
2607 | group->wpa_group_state = WPA_GROUP_GTK_INIT; | |
2608 | ||
2609 | /* GTK[0..N] = 0 */ | |
2610 | os_memset(group->GTK, 0, sizeof(group->GTK)); | |
2611 | group->GN = 1; | |
2612 | group->GM = 2; | |
2613 | #ifdef CONFIG_IEEE80211W | |
2614 | group->GN_igtk = 4; | |
2615 | group->GM_igtk = 5; | |
2616 | #endif /* CONFIG_IEEE80211W */ | |
2617 | /* GTK[GN] = CalcGTK() */ | |
2618 | wpa_gtk_update(wpa_auth, group); | |
2619 | } | |
2620 | ||
2621 | ||
2622 | static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx) | |
2623 | { | |
2624 | if (ctx != NULL && ctx != sm->group) | |
2625 | return 0; | |
2626 | ||
2627 | if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) { | |
2628 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2629 | "Not in PTKINITDONE; skip Group Key update"); | |
2630 | sm->GUpdateStationKeys = FALSE; | |
2631 | return 0; | |
2632 | } | |
2633 | if (sm->GUpdateStationKeys) { | |
2634 | /* | |
2635 | * This should not really happen, so add a debug log entry. | |
2636 | * Since we clear the GKeyDoneStations before the loop, the | |
2637 | * station needs to be counted here anyway. | |
2638 | */ | |
2639 | wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG, | |
2640 | "GUpdateStationKeys was already set when " | |
2641 | "marking station for GTK rekeying"); | |
2642 | } | |
2643 | ||
2644 | /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */ | |
2645 | if (sm->is_wnmsleep) | |
2646 | return 0; | |
2647 | ||
2648 | sm->group->GKeyDoneStations++; | |
2649 | sm->GUpdateStationKeys = TRUE; | |
2650 | ||
2651 | wpa_sm_step(sm); | |
2652 | return 0; | |
2653 | } | |
2654 | ||
2655 | ||
2656 | #ifdef CONFIG_WNM | |
2657 | /* update GTK when exiting WNM-Sleep Mode */ | |
2658 | void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm) | |
2659 | { | |
2660 | if (sm == NULL || sm->is_wnmsleep) | |
2661 | return; | |
2662 | ||
2663 | wpa_group_update_sta(sm, NULL); | |
2664 | } | |
2665 | ||
2666 | ||
2667 | void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag) | |
2668 | { | |
2669 | if (sm) | |
2670 | sm->is_wnmsleep = !!flag; | |
2671 | } | |
2672 | ||
2673 | ||
2674 | int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
2675 | { | |
2676 | struct wpa_group *gsm = sm->group; | |
2677 | u8 *start = pos; | |
2678 | ||
2679 | /* | |
2680 | * GTK subelement: | |
2681 | * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] | | |
2682 | * Key[5..32] | |
2683 | */ | |
2684 | *pos++ = WNM_SLEEP_SUBELEM_GTK; | |
2685 | *pos++ = 11 + gsm->GTK_len; | |
2686 | /* Key ID in B0-B1 of Key Info */ | |
2687 | WPA_PUT_LE16(pos, gsm->GN & 0x03); | |
2688 | pos += 2; | |
2689 | *pos++ = gsm->GTK_len; | |
2690 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0) | |
2691 | return 0; | |
2692 | pos += 8; | |
2693 | os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
2694 | pos += gsm->GTK_len; | |
2695 | ||
2696 | wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit", | |
2697 | gsm->GN); | |
2698 | wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit", | |
2699 | gsm->GTK[gsm->GN - 1], gsm->GTK_len); | |
2700 | ||
2701 | return pos - start; | |
2702 | } | |
2703 | ||
2704 | ||
2705 | #ifdef CONFIG_IEEE80211W | |
2706 | int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos) | |
2707 | { | |
2708 | struct wpa_group *gsm = sm->group; | |
2709 | u8 *start = pos; | |
2710 | size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher); | |
2711 | ||
2712 | /* | |
2713 | * IGTK subelement: | |
2714 | * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16] | |
2715 | */ | |
2716 | *pos++ = WNM_SLEEP_SUBELEM_IGTK; | |
2717 | *pos++ = 2 + 6 + len; | |
2718 | WPA_PUT_LE16(pos, gsm->GN_igtk); | |
2719 | pos += 2; | |
2720 | if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0) | |
2721 | return 0; | |
2722 | pos += 6; | |
2723 | ||
2724 | os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len); | |
2725 | pos += len; | |
2726 | ||
2727 | wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit", | |
2728 | gsm->GN_igtk); | |
2729 | wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit", | |
2730 | gsm->IGTK[gsm->GN_igtk - 4], len); | |
2731 | ||
2732 | return pos - start; | |
2733 | } | |
2734 | #endif /* CONFIG_IEEE80211W */ | |
2735 | #endif /* CONFIG_WNM */ | |
2736 | ||
2737 | ||
2738 | static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth, | |
2739 | struct wpa_group *group) | |
2740 | { | |
2741 | int tmp; | |
2742 | ||
2743 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2744 | "SETKEYS (VLAN-ID %d)", group->vlan_id); | |
2745 | group->changed = TRUE; | |
2746 | group->wpa_group_state = WPA_GROUP_SETKEYS; | |
2747 | group->GTKReKey = FALSE; | |
2748 | tmp = group->GM; | |
2749 | group->GM = group->GN; | |
2750 | group->GN = tmp; | |
2751 | #ifdef CONFIG_IEEE80211W | |
2752 | tmp = group->GM_igtk; | |
2753 | group->GM_igtk = group->GN_igtk; | |
2754 | group->GN_igtk = tmp; | |
2755 | #endif /* CONFIG_IEEE80211W */ | |
2756 | /* "GKeyDoneStations = GNoStations" is done in more robust way by | |
2757 | * counting the STAs that are marked with GUpdateStationKeys instead of | |
2758 | * including all STAs that could be in not-yet-completed state. */ | |
2759 | wpa_gtk_update(wpa_auth, group); | |
2760 | ||
2761 | if (group->GKeyDoneStations) { | |
2762 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected " | |
2763 | "GKeyDoneStations=%d when starting new GTK rekey", | |
2764 | group->GKeyDoneStations); | |
2765 | group->GKeyDoneStations = 0; | |
2766 | } | |
2767 | wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group); | |
2768 | wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d", | |
2769 | group->GKeyDoneStations); | |
2770 | } | |
2771 | ||
2772 | ||
2773 | static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth, | |
2774 | struct wpa_group *group) | |
2775 | { | |
2776 | int ret = 0; | |
2777 | ||
2778 | if (wpa_auth_set_key(wpa_auth, group->vlan_id, | |
2779 | wpa_cipher_to_alg(wpa_auth->conf.wpa_group), | |
2780 | broadcast_ether_addr, group->GN, | |
2781 | group->GTK[group->GN - 1], group->GTK_len) < 0) | |
2782 | ret = -1; | |
2783 | ||
2784 | #ifdef CONFIG_IEEE80211W | |
2785 | if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) { | |
2786 | enum wpa_alg alg; | |
2787 | size_t len; | |
2788 | ||
2789 | alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher); | |
2790 | len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher); | |
2791 | ||
2792 | if (ret == 0 && | |
2793 | wpa_auth_set_key(wpa_auth, group->vlan_id, alg, | |
2794 | broadcast_ether_addr, group->GN_igtk, | |
2795 | group->IGTK[group->GN_igtk - 4], len) < 0) | |
2796 | ret = -1; | |
2797 | } | |
2798 | #endif /* CONFIG_IEEE80211W */ | |
2799 | ||
2800 | return ret; | |
2801 | } | |
2802 | ||
2803 | ||
2804 | static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx) | |
2805 | { | |
2806 | if (sm->group == ctx) { | |
2807 | wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR | |
2808 | " for discconnection due to fatal failure", | |
2809 | MAC2STR(sm->addr)); | |
2810 | sm->Disconnect = TRUE; | |
2811 | } | |
2812 | ||
2813 | return 0; | |
2814 | } | |
2815 | ||
2816 | ||
2817 | static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth, | |
2818 | struct wpa_group *group) | |
2819 | { | |
2820 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE"); | |
2821 | group->changed = TRUE; | |
2822 | group->wpa_group_state = WPA_GROUP_FATAL_FAILURE; | |
2823 | wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group); | |
2824 | } | |
2825 | ||
2826 | ||
2827 | static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth, | |
2828 | struct wpa_group *group) | |
2829 | { | |
2830 | wpa_printf(MSG_DEBUG, "WPA: group state machine entering state " | |
2831 | "SETKEYSDONE (VLAN-ID %d)", group->vlan_id); | |
2832 | group->changed = TRUE; | |
2833 | group->wpa_group_state = WPA_GROUP_SETKEYSDONE; | |
2834 | ||
2835 | if (wpa_group_config_group_keys(wpa_auth, group) < 0) { | |
2836 | wpa_group_fatal_failure(wpa_auth, group); | |
2837 | return -1; | |
2838 | } | |
2839 | ||
2840 | return 0; | |
2841 | } | |
2842 | ||
2843 | ||
2844 | static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth, | |
2845 | struct wpa_group *group) | |
2846 | { | |
2847 | if (group->GInit) { | |
2848 | wpa_group_gtk_init(wpa_auth, group); | |
2849 | } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) { | |
2850 | /* Do not allow group operations */ | |
2851 | } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT && | |
2852 | group->GTKAuthenticator) { | |
2853 | wpa_group_setkeysdone(wpa_auth, group); | |
2854 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE && | |
2855 | group->GTKReKey) { | |
2856 | wpa_group_setkeys(wpa_auth, group); | |
2857 | } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) { | |
2858 | if (group->GKeyDoneStations == 0) | |
2859 | wpa_group_setkeysdone(wpa_auth, group); | |
2860 | else if (group->GTKReKey) | |
2861 | wpa_group_setkeys(wpa_auth, group); | |
2862 | } | |
2863 | } | |
2864 | ||
2865 | ||
2866 | static int wpa_sm_step(struct wpa_state_machine *sm) | |
2867 | { | |
2868 | if (sm == NULL) | |
2869 | return 0; | |
2870 | ||
2871 | if (sm->in_step_loop) { | |
2872 | /* This should not happen, but if it does, make sure we do not | |
2873 | * end up freeing the state machine too early by exiting the | |
2874 | * recursive call. */ | |
2875 | wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively"); | |
2876 | return 0; | |
2877 | } | |
2878 | ||
2879 | sm->in_step_loop = 1; | |
2880 | do { | |
2881 | if (sm->pending_deinit) | |
2882 | break; | |
2883 | ||
2884 | sm->changed = FALSE; | |
2885 | sm->wpa_auth->group->changed = FALSE; | |
2886 | ||
2887 | SM_STEP_RUN(WPA_PTK); | |
2888 | if (sm->pending_deinit) | |
2889 | break; | |
2890 | SM_STEP_RUN(WPA_PTK_GROUP); | |
2891 | if (sm->pending_deinit) | |
2892 | break; | |
2893 | wpa_group_sm_step(sm->wpa_auth, sm->group); | |
2894 | } while (sm->changed || sm->wpa_auth->group->changed); | |
2895 | sm->in_step_loop = 0; | |
2896 | ||
2897 | if (sm->pending_deinit) { | |
2898 | wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state " | |
2899 | "machine deinit for " MACSTR, MAC2STR(sm->addr)); | |
2900 | wpa_free_sta_sm(sm); | |
2901 | return 1; | |
2902 | } | |
2903 | return 0; | |
2904 | } | |
2905 | ||
2906 | ||
2907 | static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx) | |
2908 | { | |
2909 | struct wpa_state_machine *sm = eloop_ctx; | |
2910 | wpa_sm_step(sm); | |
2911 | } | |
2912 | ||
2913 | ||
2914 | void wpa_auth_sm_notify(struct wpa_state_machine *sm) | |
2915 | { | |
2916 | if (sm == NULL) | |
2917 | return; | |
2918 | eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL); | |
2919 | } | |
2920 | ||
2921 | ||
2922 | void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth) | |
2923 | { | |
2924 | int tmp, i; | |
2925 | struct wpa_group *group; | |
2926 | ||
2927 | if (wpa_auth == NULL) | |
2928 | return; | |
2929 | ||
2930 | group = wpa_auth->group; | |
2931 | ||
2932 | for (i = 0; i < 2; i++) { | |
2933 | tmp = group->GM; | |
2934 | group->GM = group->GN; | |
2935 | group->GN = tmp; | |
2936 | #ifdef CONFIG_IEEE80211W | |
2937 | tmp = group->GM_igtk; | |
2938 | group->GM_igtk = group->GN_igtk; | |
2939 | group->GN_igtk = tmp; | |
2940 | #endif /* CONFIG_IEEE80211W */ | |
2941 | wpa_gtk_update(wpa_auth, group); | |
2942 | wpa_group_config_group_keys(wpa_auth, group); | |
2943 | } | |
2944 | } | |
2945 | ||
2946 | ||
2947 | static const char * wpa_bool_txt(int bool) | |
2948 | { | |
2949 | return bool ? "TRUE" : "FALSE"; | |
2950 | } | |
2951 | ||
2952 | ||
2953 | #define RSN_SUITE "%02x-%02x-%02x-%d" | |
2954 | #define RSN_SUITE_ARG(s) \ | |
2955 | ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff | |
2956 | ||
2957 | int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen) | |
2958 | { | |
2959 | int len = 0, ret; | |
2960 | char pmkid_txt[PMKID_LEN * 2 + 1]; | |
2961 | #ifdef CONFIG_RSN_PREAUTH | |
2962 | const int preauth = 1; | |
2963 | #else /* CONFIG_RSN_PREAUTH */ | |
2964 | const int preauth = 0; | |
2965 | #endif /* CONFIG_RSN_PREAUTH */ | |
2966 | ||
2967 | if (wpa_auth == NULL) | |
2968 | return len; | |
2969 | ||
2970 | ret = os_snprintf(buf + len, buflen - len, | |
2971 | "dot11RSNAOptionImplemented=TRUE\n" | |
2972 | "dot11RSNAPreauthenticationImplemented=%s\n" | |
2973 | "dot11RSNAEnabled=%s\n" | |
2974 | "dot11RSNAPreauthenticationEnabled=%s\n", | |
2975 | wpa_bool_txt(preauth), | |
2976 | wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN), | |
2977 | wpa_bool_txt(wpa_auth->conf.rsn_preauth)); | |
2978 | if (os_snprintf_error(buflen - len, ret)) | |
2979 | return len; | |
2980 | len += ret; | |
2981 | ||
2982 | wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), | |
2983 | wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN); | |
2984 | ||
2985 | ret = os_snprintf( | |
2986 | buf + len, buflen - len, | |
2987 | "dot11RSNAConfigVersion=%u\n" | |
2988 | "dot11RSNAConfigPairwiseKeysSupported=9999\n" | |
2989 | /* FIX: dot11RSNAConfigGroupCipher */ | |
2990 | /* FIX: dot11RSNAConfigGroupRekeyMethod */ | |
2991 | /* FIX: dot11RSNAConfigGroupRekeyTime */ | |
2992 | /* FIX: dot11RSNAConfigGroupRekeyPackets */ | |
2993 | "dot11RSNAConfigGroupRekeyStrict=%u\n" | |
2994 | "dot11RSNAConfigGroupUpdateCount=%u\n" | |
2995 | "dot11RSNAConfigPairwiseUpdateCount=%u\n" | |
2996 | "dot11RSNAConfigGroupCipherSize=%u\n" | |
2997 | "dot11RSNAConfigPMKLifetime=%u\n" | |
2998 | "dot11RSNAConfigPMKReauthThreshold=%u\n" | |
2999 | "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n" | |
3000 | "dot11RSNAConfigSATimeout=%u\n" | |
3001 | "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" | |
3002 | "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" | |
3003 | "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" | |
3004 | "dot11RSNAPMKIDUsed=%s\n" | |
3005 | "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" | |
3006 | "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" | |
3007 | "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" | |
3008 | "dot11RSNATKIPCounterMeasuresInvoked=%u\n" | |
3009 | "dot11RSNA4WayHandshakeFailures=%u\n" | |
3010 | "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n", | |
3011 | RSN_VERSION, | |
3012 | !!wpa_auth->conf.wpa_strict_rekey, | |
3013 | dot11RSNAConfigGroupUpdateCount, | |
3014 | dot11RSNAConfigPairwiseUpdateCount, | |
3015 | wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8, | |
3016 | dot11RSNAConfigPMKLifetime, | |
3017 | dot11RSNAConfigPMKReauthThreshold, | |
3018 | dot11RSNAConfigSATimeout, | |
3019 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected), | |
3020 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected), | |
3021 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected), | |
3022 | pmkid_txt, | |
3023 | RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested), | |
3024 | RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested), | |
3025 | RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested), | |
3026 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked, | |
3027 | wpa_auth->dot11RSNA4WayHandshakeFailures); | |
3028 | if (os_snprintf_error(buflen - len, ret)) | |
3029 | return len; | |
3030 | len += ret; | |
3031 | ||
3032 | /* TODO: dot11RSNAConfigPairwiseCiphersTable */ | |
3033 | /* TODO: dot11RSNAConfigAuthenticationSuitesTable */ | |
3034 | ||
3035 | /* Private MIB */ | |
3036 | ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n", | |
3037 | wpa_auth->group->wpa_group_state); | |
3038 | if (os_snprintf_error(buflen - len, ret)) | |
3039 | return len; | |
3040 | len += ret; | |
3041 | ||
3042 | return len; | |
3043 | } | |
3044 | ||
3045 | ||
3046 | int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen) | |
3047 | { | |
3048 | int len = 0, ret; | |
3049 | u32 pairwise = 0; | |
3050 | ||
3051 | if (sm == NULL) | |
3052 | return 0; | |
3053 | ||
3054 | /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */ | |
3055 | ||
3056 | /* dot11RSNAStatsEntry */ | |
3057 | ||
3058 | pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ? | |
3059 | WPA_PROTO_RSN : WPA_PROTO_WPA, | |
3060 | sm->pairwise); | |
3061 | if (pairwise == 0) | |
3062 | return 0; | |
3063 | ||
3064 | ret = os_snprintf( | |
3065 | buf + len, buflen - len, | |
3066 | /* TODO: dot11RSNAStatsIndex */ | |
3067 | "dot11RSNAStatsSTAAddress=" MACSTR "\n" | |
3068 | "dot11RSNAStatsVersion=1\n" | |
3069 | "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n" | |
3070 | /* TODO: dot11RSNAStatsTKIPICVErrors */ | |
3071 | "dot11RSNAStatsTKIPLocalMICFailures=%u\n" | |
3072 | "dot11RSNAStatsTKIPRemoteMICFailures=%u\n" | |
3073 | /* TODO: dot11RSNAStatsCCMPReplays */ | |
3074 | /* TODO: dot11RSNAStatsCCMPDecryptErrors */ | |
3075 | /* TODO: dot11RSNAStatsTKIPReplays */, | |
3076 | MAC2STR(sm->addr), | |
3077 | RSN_SUITE_ARG(pairwise), | |
3078 | sm->dot11RSNAStatsTKIPLocalMICFailures, | |
3079 | sm->dot11RSNAStatsTKIPRemoteMICFailures); | |
3080 | if (os_snprintf_error(buflen - len, ret)) | |
3081 | return len; | |
3082 | len += ret; | |
3083 | ||
3084 | /* Private MIB */ | |
3085 | ret = os_snprintf(buf + len, buflen - len, | |
3086 | "hostapdWPAPTKState=%d\n" | |
3087 | "hostapdWPAPTKGroupState=%d\n", | |
3088 | sm->wpa_ptk_state, | |
3089 | sm->wpa_ptk_group_state); | |
3090 | if (os_snprintf_error(buflen - len, ret)) | |
3091 | return len; | |
3092 | len += ret; | |
3093 | ||
3094 | return len; | |
3095 | } | |
3096 | ||
3097 | ||
3098 | void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth) | |
3099 | { | |
3100 | if (wpa_auth) | |
3101 | wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++; | |
3102 | } | |
3103 | ||
3104 | ||
3105 | int wpa_auth_pairwise_set(struct wpa_state_machine *sm) | |
3106 | { | |
3107 | return sm && sm->pairwise_set; | |
3108 | } | |
3109 | ||
3110 | ||
3111 | int wpa_auth_get_pairwise(struct wpa_state_machine *sm) | |
3112 | { | |
3113 | return sm->pairwise; | |
3114 | } | |
3115 | ||
3116 | ||
3117 | int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm) | |
3118 | { | |
3119 | if (sm == NULL) | |
3120 | return -1; | |
3121 | return sm->wpa_key_mgmt; | |
3122 | } | |
3123 | ||
3124 | ||
3125 | int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) | |
3126 | { | |
3127 | if (sm == NULL) | |
3128 | return 0; | |
3129 | return sm->wpa; | |
3130 | } | |
3131 | ||
3132 | ||
3133 | int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, | |
3134 | struct rsn_pmksa_cache_entry *entry) | |
3135 | { | |
3136 | if (sm == NULL || sm->pmksa != entry) | |
3137 | return -1; | |
3138 | sm->pmksa = NULL; | |
3139 | return 0; | |
3140 | } | |
3141 | ||
3142 | ||
3143 | struct rsn_pmksa_cache_entry * | |
3144 | wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm) | |
3145 | { | |
3146 | return sm ? sm->pmksa : NULL; | |
3147 | } | |
3148 | ||
3149 | ||
3150 | void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm) | |
3151 | { | |
3152 | if (sm) | |
3153 | sm->dot11RSNAStatsTKIPLocalMICFailures++; | |
3154 | } | |
3155 | ||
3156 | ||
3157 | const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len) | |
3158 | { | |
3159 | if (wpa_auth == NULL) | |
3160 | return NULL; | |
3161 | *len = wpa_auth->wpa_ie_len; | |
3162 | return wpa_auth->wpa_ie; | |
3163 | } | |
3164 | ||
3165 | ||
3166 | int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk, | |
3167 | int session_timeout, struct eapol_state_machine *eapol) | |
3168 | { | |
3169 | if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 || | |
3170 | sm->wpa_auth->conf.disable_pmksa_caching) | |
3171 | return -1; | |
3172 | ||
3173 | if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN, | |
3174 | sm->PTK.kck, sizeof(sm->PTK.kck), | |
3175 | sm->wpa_auth->addr, sm->addr, session_timeout, | |
3176 | eapol, sm->wpa_key_mgmt)) | |
3177 | return 0; | |
3178 | ||
3179 | return -1; | |
3180 | } | |
3181 | ||
3182 | ||
3183 | int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth, | |
3184 | const u8 *pmk, size_t len, const u8 *sta_addr, | |
3185 | int session_timeout, | |
3186 | struct eapol_state_machine *eapol) | |
3187 | { | |
3188 | if (wpa_auth == NULL) | |
3189 | return -1; | |
3190 | ||
3191 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, | |
3192 | NULL, 0, | |
3193 | wpa_auth->addr, | |
3194 | sta_addr, session_timeout, eapol, | |
3195 | WPA_KEY_MGMT_IEEE8021X)) | |
3196 | return 0; | |
3197 | ||
3198 | return -1; | |
3199 | } | |
3200 | ||
3201 | ||
3202 | int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr, | |
3203 | const u8 *pmk) | |
3204 | { | |
3205 | if (wpa_auth->conf.disable_pmksa_caching) | |
3206 | return -1; | |
3207 | ||
3208 | if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, | |
3209 | NULL, 0, | |
3210 | wpa_auth->addr, addr, 0, NULL, | |
3211 | WPA_KEY_MGMT_SAE)) | |
3212 | return 0; | |
3213 | ||
3214 | return -1; | |
3215 | } | |
3216 | ||
3217 | ||
3218 | void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth, | |
3219 | const u8 *sta_addr) | |
3220 | { | |
3221 | struct rsn_pmksa_cache_entry *pmksa; | |
3222 | ||
3223 | if (wpa_auth == NULL || wpa_auth->pmksa == NULL) | |
3224 | return; | |
3225 | pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL); | |
3226 | if (pmksa) { | |
3227 | wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for " | |
3228 | MACSTR " based on request", MAC2STR(sta_addr)); | |
3229 | pmksa_cache_free_entry(wpa_auth->pmksa, pmksa); | |
3230 | } | |
3231 | } | |
3232 | ||
3233 | ||
3234 | static struct wpa_group * | |
3235 | wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id) | |
3236 | { | |
3237 | struct wpa_group *group; | |
3238 | ||
3239 | if (wpa_auth == NULL || wpa_auth->group == NULL) | |
3240 | return NULL; | |
3241 | ||
3242 | wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d", | |
3243 | vlan_id); | |
3244 | group = wpa_group_init(wpa_auth, vlan_id, 0); | |
3245 | if (group == NULL) | |
3246 | return NULL; | |
3247 | ||
3248 | group->next = wpa_auth->group->next; | |
3249 | wpa_auth->group->next = group; | |
3250 | ||
3251 | return group; | |
3252 | } | |
3253 | ||
3254 | ||
3255 | int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id) | |
3256 | { | |
3257 | struct wpa_group *group; | |
3258 | ||
3259 | if (sm == NULL || sm->wpa_auth == NULL) | |
3260 | return 0; | |
3261 | ||
3262 | group = sm->wpa_auth->group; | |
3263 | while (group) { | |
3264 | if (group->vlan_id == vlan_id) | |
3265 | break; | |
3266 | group = group->next; | |
3267 | } | |
3268 | ||
3269 | if (group == NULL) { | |
3270 | group = wpa_auth_add_group(sm->wpa_auth, vlan_id); | |
3271 | if (group == NULL) | |
3272 | return -1; | |
3273 | } | |
3274 | ||
3275 | if (sm->group == group) | |
3276 | return 0; | |
3277 | ||
3278 | if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) | |
3279 | return -1; | |
3280 | ||
3281 | wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state " | |
3282 | "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id); | |
3283 | ||
3284 | sm->group = group; | |
3285 | return 0; | |
3286 | } | |
3287 | ||
3288 | ||
3289 | void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth, | |
3290 | struct wpa_state_machine *sm, int ack) | |
3291 | { | |
3292 | if (wpa_auth == NULL || sm == NULL) | |
3293 | return; | |
3294 | wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR | |
3295 | " ack=%d", MAC2STR(sm->addr), ack); | |
3296 | if (sm->pending_1_of_4_timeout && ack) { | |
3297 | /* | |
3298 | * Some deployed supplicant implementations update their SNonce | |
3299 | * for each EAPOL-Key 2/4 message even within the same 4-way | |
3300 | * handshake and then fail to use the first SNonce when | |
3301 | * deriving the PTK. This results in unsuccessful 4-way | |
3302 | * handshake whenever the relatively short initial timeout is | |
3303 | * reached and EAPOL-Key 1/4 is retransmitted. Try to work | |
3304 | * around this by increasing the timeout now that we know that | |
3305 | * the station has received the frame. | |
3306 | */ | |
3307 | int timeout_ms = eapol_key_timeout_subseq; | |
3308 | wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 " | |
3309 | "timeout by %u ms because of acknowledged frame", | |
3310 | timeout_ms); | |
3311 | eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm); | |
3312 | eloop_register_timeout(timeout_ms / 1000, | |
3313 | (timeout_ms % 1000) * 1000, | |
3314 | wpa_send_eapol_timeout, wpa_auth, sm); | |
3315 | } | |
3316 | } | |
3317 | ||
3318 | ||
3319 | int wpa_auth_uses_sae(struct wpa_state_machine *sm) | |
3320 | { | |
3321 | if (sm == NULL) | |
3322 | return 0; | |
3323 | return wpa_key_mgmt_sae(sm->wpa_key_mgmt); | |
3324 | } | |
3325 | ||
3326 | ||
3327 | int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm) | |
3328 | { | |
3329 | if (sm == NULL) | |
3330 | return 0; | |
3331 | return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE; | |
3332 | } | |
3333 | ||
3334 | ||
3335 | #ifdef CONFIG_P2P | |
3336 | int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr) | |
3337 | { | |
3338 | if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0) | |
3339 | return -1; | |
3340 | os_memcpy(addr, sm->ip_addr, 4); | |
3341 | return 0; | |
3342 | } | |
3343 | #endif /* CONFIG_P2P */ | |
3344 | ||
3345 | ||
3346 | int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth, | |
3347 | struct radius_das_attrs *attr) | |
3348 | { | |
3349 | return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr); | |
3350 | } |