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FILS: Move Session element validation to a helper function
[thirdparty/hostap.git] / src / ap / wpa_auth.c
CommitLineData
6fc6879b 1/*
00338a4f 2 * IEEE 802.11 RSN / WPA Authenticator
98cd3d1c 3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
6fc6879b 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
6226e38d 9#include "utils/includes.h"
6fc6879b 10
6226e38d
JM		 11#include "utils/common.h"
12#include "utils/eloop.h"
13#include "utils/state_machine.h"
25ef8529 14#include "utils/bitfield.h"
81f4f619 15#include "common/ieee802_11_defs.h"
3b5b7aa8 16#include "crypto/aes.h"
03da66bd 17#include "crypto/aes_wrap.h"
3b5b7aa8 18#include "crypto/aes_siv.h"
03da66bd
JM		 19#include "crypto/crypto.h"
20#include "crypto/sha1.h"
21#include "crypto/sha256.h"
3642c431 22#include "crypto/random.h"
281c950b 23#include "eapol_auth/eapol_auth_sm.h"
6226e38d 24#include "ap_config.h"
6fc6879b 25#include "ieee802_11.h"
6226e38d
JM		 26#include "wpa_auth.h"
27#include "pmksa_cache_auth.h"
6fc6879b
JM		 28#include "wpa_auth_i.h"
29#include "wpa_auth_ie.h"
30
31#define STATE_MACHINE_DATA struct wpa_state_machine
32#define STATE_MACHINE_DEBUG_PREFIX "WPA"
33#define STATE_MACHINE_ADDR sm->addr
34
35
36static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 37static int wpa_sm_step(struct wpa_state_machine *sm);
929a2ea5
JM		 38static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
39 size_t data_len);
75c8563e
JM		 40#ifdef CONFIG_FILS
41static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
42 u8 *buf, size_t buf_len, u16 *_key_data_len);
43#endif /* CONFIG_FILS */
6fc6879b
JM		 44static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
45static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
46 struct wpa_group *group);
581a8cde 47static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 48static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
49 struct wpa_group *group);
1bdb7ab3
JM		 50static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
51 struct wpa_group *group);
f23c5b17 52static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 53 const u8 *pmk, unsigned int pmk_len,
54 struct wpa_ptk *ptk);
a0ad9e8c
MB		 55static void wpa_group_free(struct wpa_authenticator *wpa_auth,
56 struct wpa_group *group);
57static void wpa_group_get(struct wpa_authenticator *wpa_auth,
58 struct wpa_group *group);
59static void wpa_group_put(struct wpa_authenticator *wpa_auth,
60 struct wpa_group *group);
e73ffa09 61static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
6fc6879b 62
bae61562
JM		 63static const u32 eapol_key_timeout_first = 100; /* ms */
64static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 65static const u32 eapol_key_timeout_first_group = 500; /* ms */
6fc6879b
JM		 66
67/* TODO: make these configurable */
68static const int dot11RSNAConfigPMKLifetime = 43200;
69static const int dot11RSNAConfigPMKReauthThreshold = 70;
70static const int dot11RSNAConfigSATimeout = 60;
71
72
c772d054 73static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 74 struct wpa_authenticator *wpa_auth, const u8 *addr)
75{
cef8fac0
JB		 76 if (wpa_auth->cb->mic_failure_report)
77 return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
c772d054 78 return 0;
6fc6879b
JM		 79}
80
81
2c502460
JM		 82static inline void wpa_auth_psk_failure_report(
83 struct wpa_authenticator *wpa_auth, const u8 *addr)
84{
cef8fac0
JB		 85 if (wpa_auth->cb->psk_failure_report)
86 wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
2c502460
JM		 87}
88
89
6fc6879b
JM		 90static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
91 const u8 *addr, wpa_eapol_variable var,
92 int value)
93{
cef8fac0
JB		 94 if (wpa_auth->cb->set_eapol)
95 wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
6fc6879b
JM		 96}
97
98
99static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
100 const u8 *addr, wpa_eapol_variable var)
101{
cef8fac0 102 if (wpa_auth->cb->get_eapol == NULL)
6fc6879b 103 return -1;
cef8fac0 104 return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
6fc6879b
JM		 105}
106
107
108static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 109 const u8 *addr,
110 const u8 *p2p_dev_addr,
111 const u8 *prev_psk)
6fc6879b 112{
cef8fac0 113 if (wpa_auth->cb->get_psk == NULL)
6fc6879b 114 return NULL;
cef8fac0
JB		 115 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
116 prev_psk);
6fc6879b
JM		 117}
118
119
120static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
121 const u8 *addr, u8 *msk, size_t *len)
122{
cef8fac0 123 if (wpa_auth->cb->get_msk == NULL)
6fc6879b 124 return -1;
cef8fac0 125 return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
6fc6879b
JM		 126}
127
128
129static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
130 int vlan_id,
71934751 131 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 132 u8 *key, size_t key_len)
133{
cef8fac0 134 if (wpa_auth->cb->set_key == NULL)
6fc6879b 135 return -1;
cef8fac0
JB		 136 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
137 key, key_len);
6fc6879b
JM		 138}
139
140
141static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
142 const u8 *addr, int idx, u8 *seq)
143{
cef8fac0 144 if (wpa_auth->cb->get_seqnum == NULL)
6fc6879b 145 return -1;
cef8fac0 146 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
6fc6879b
JM		 147}
148
149
6fc6879b
JM		 150static inline int
151wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
152 const u8 *data, size_t data_len, int encrypt)
153{
cef8fac0 154 if (wpa_auth->cb->send_eapol == NULL)
6fc6879b 155 return -1;
cef8fac0
JB		 156 return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
157 encrypt);
6fc6879b
JM		 158}
159
160
c50d94f1
BC		 161#ifdef CONFIG_MESH
162static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
163 const u8 *addr)
164{
cef8fac0 165 if (wpa_auth->cb->start_ampe == NULL)
c50d94f1 166 return -1;
cef8fac0 167 return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
c50d94f1
BC		 168}
169#endif /* CONFIG_MESH */
170
171
6fc6879b
JM		 172int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
173 int (*cb)(struct wpa_state_machine *sm, void *ctx),
174 void *cb_ctx)
175{
cef8fac0 176 if (wpa_auth->cb->for_each_sta == NULL)
6fc6879b 177 return 0;
cef8fac0 178 return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
6fc6879b
JM		 179}
180
181
bf98f7f3
JM		 182int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
183 int (*cb)(struct wpa_authenticator *a, void *ctx),
184 void *cb_ctx)
185{
cef8fac0 186 if (wpa_auth->cb->for_each_auth == NULL)
bf98f7f3 187 return 0;
cef8fac0 188 return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
bf98f7f3
JM		 189}
190
191
6fc6879b
JM		 192void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
193 logger_level level, const char *txt)
194{
cef8fac0 195 if (wpa_auth->cb->logger == NULL)
6fc6879b 196 return;
cef8fac0 197 wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
6fc6879b
JM		 198}
199
200
201void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
202 logger_level level, const char *fmt, ...)
203{
204 char *format;
205 int maxlen;
206 va_list ap;
207
cef8fac0 208 if (wpa_auth->cb->logger == NULL)
6fc6879b
JM		 209 return;
210
211 maxlen = os_strlen(fmt) + 100;
212 format = os_malloc(maxlen);
213 if (!format)
214 return;
215
216 va_start(ap, fmt);
217 vsnprintf(format, maxlen, fmt, ap);
218 va_end(ap);
219
220 wpa_auth_logger(wpa_auth, addr, level, format);
221
222 os_free(format);
223}
224
225
226static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
227 const u8 *addr)
228{
cef8fac0 229 if (wpa_auth->cb->disconnect == NULL)
6fc6879b 230 return;
afcc9ea1 231 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
cef8fac0
JB		 232 wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr,
233 WLAN_REASON_PREV_AUTH_NOT_VALID);
6fc6879b
JM		 234}
235
236
237static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
238{
56586197 239 int ret = 0;
4ec1fd8e 240#ifdef CONFIG_IEEE80211R_AP
56586197
JM		 241 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
242 ret = 1;
4ec1fd8e 243#endif /* CONFIG_IEEE80211R_AP */
56586197
JM		 244#ifdef CONFIG_IEEE80211W
245 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
246 ret = 1;
247#endif /* CONFIG_IEEE80211W */
a14896e8
JM		 248 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
249 ret = 1;
56586197 250 return ret;
6fc6879b
JM		 251}
252
253
254static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
255{
256 struct wpa_authenticator *wpa_auth = eloop_ctx;
257
3642c431 258 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 259 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
260 "initialization.");
261 } else {
262 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 263 wpa_hexdump_key(MSG_DEBUG, "GMK",
264 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 265 }
266
267 if (wpa_auth->conf.wpa_gmk_rekey) {
268 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
269 wpa_rekey_gmk, wpa_auth, NULL);
270 }
271}
272
273
274static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
275{
276 struct wpa_authenticator *wpa_auth = eloop_ctx;
a0ad9e8c 277 struct wpa_group *group, *next;
6fc6879b
JM		 278
279 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
a0ad9e8c
MB		 280 group = wpa_auth->group;
281 while (group) {
282 wpa_group_get(wpa_auth, group);
283
6fc6879b
JM		 284 group->GTKReKey = TRUE;
285 do {
286 group->changed = FALSE;
287 wpa_group_sm_step(wpa_auth, group);
288 } while (group->changed);
a0ad9e8c
MB		 289
290 next = group->next;
291 wpa_group_put(wpa_auth, group);
292 group = next;
6fc6879b
JM		 293 }
294
295 if (wpa_auth->conf.wpa_group_rekey) {
296 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
297 0, wpa_rekey_gtk, wpa_auth, NULL);
298 }
299}
300
301
581a8cde
JM		 302static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
303{
304 struct wpa_authenticator *wpa_auth = eloop_ctx;
305 struct wpa_state_machine *sm = timeout_ctx;
306
307 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
308 wpa_request_new_ptk(sm);
309 wpa_sm_step(sm);
310}
311
312
6fc6879b
JM		 313static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
314{
315 if (sm->pmksa == ctx)
316 sm->pmksa = NULL;
317 return 0;
318}
319
320
321static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
322 void *ctx)
323{
324 struct wpa_authenticator *wpa_auth = ctx;
325 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
326}
327
328
1bdb7ab3
JM		 329static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
330 struct wpa_group *group)
331{
559cdabb 332 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 333 u8 rkey[32];
559cdabb 334 unsigned long ptr;
1bdb7ab3 335
3642c431 336 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 337 return -1;
338 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
339
340 /*
341 * Counter = PRF-256(Random number, "Init Counter",
342 * Local MAC Address || Time)
343 */
344 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
345 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 346 ptr = (unsigned long) group;
347 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
3642c431 348 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 349 return -1;
350
351 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
352 group->Counter, WPA_NONCE_LEN) < 0)
353 return -1;
354 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
355 group->Counter, WPA_NONCE_LEN);
356
357 return 0;
358}
359
360
e6965d4e 361static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 362 int vlan_id, int delay_init)
e6965d4e
JM		 363{
364 struct wpa_group *group;
e6965d4e
JM		 365
366 group = os_zalloc(sizeof(struct wpa_group));
367 if (group == NULL)
368 return NULL;
369
370 group->GTKAuthenticator = TRUE;
371 group->vlan_id = vlan_id;
c3550295 372 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 373
08704cd8
JM		 374 if (random_pool_ready() != 1) {
375 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
376 "for secure operations - update keys later when "
377 "the first station connects");
378 }
379
1bdb7ab3
JM		 380 /*
381 * Set initial GMK/Counter value here. The actual values that will be
382 * used in negotiations will be set once the first station tries to
383 * connect. This allows more time for collecting additional randomness
384 * on embedded devices.
6fc6879b 385 */
1bdb7ab3 386 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 387 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
388 "initialization.");
389 os_free(group);
390 return NULL;
391 }
6fc6879b
JM		 392
393 group->GInit = TRUE;
bdffdc5d
JM		 394 if (delay_init) {
395 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
396 "until Beacon frames have been configured");
397 /* Initialization is completed in wpa_init_keys(). */
398 } else {
399 wpa_group_sm_step(wpa_auth, group);
400 group->GInit = FALSE;
401 wpa_group_sm_step(wpa_auth, group);
402 }
6fc6879b
JM		 403
404 return group;
405}
406
407
408/**
409 * wpa_init - Initialize WPA authenticator
410 * @addr: Authenticator address
411 * @conf: Configuration for WPA authenticator
a17df5fb 412 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 413 * Returns: Pointer to WPA authenticator data or %NULL on failure
414 */
415struct wpa_authenticator * wpa_init(const u8 *addr,
416 struct wpa_auth_config *conf,
cef8fac0
JB		 417 const struct wpa_auth_callbacks *cb,
418 void *cb_ctx)
6fc6879b
JM		 419{
420 struct wpa_authenticator *wpa_auth;
421
422 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
423 if (wpa_auth == NULL)
424 return NULL;
425 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
426 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
cef8fac0
JB		 427 wpa_auth->cb = cb;
428 wpa_auth->cb_ctx = cb_ctx;
6fc6879b
JM		 429
430 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
431 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
432 os_free(wpa_auth);
433 return NULL;
434 }
435
bdffdc5d 436 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 437 if (wpa_auth->group == NULL) {
438 os_free(wpa_auth->wpa_ie);
439 os_free(wpa_auth);
440 return NULL;
441 }
442
4bb081f1
JM		 443 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
444 wpa_auth);
6fc6879b
JM		 445 if (wpa_auth->pmksa == NULL) {
446 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 447 os_free(wpa_auth->group);
6fc6879b
JM		 448 os_free(wpa_auth->wpa_ie);
449 os_free(wpa_auth);
450 return NULL;
451 }
452
4ec1fd8e 453#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 454 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
455 if (wpa_auth->ft_pmk_cache == NULL) {
456 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 457 os_free(wpa_auth->group);
6fc6879b 458 os_free(wpa_auth->wpa_ie);
4bb081f1 459 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 460 os_free(wpa_auth);
461 return NULL;
462 }
4ec1fd8e 463#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 464
465 if (wpa_auth->conf.wpa_gmk_rekey) {
466 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
467 wpa_rekey_gmk, wpa_auth, NULL);
468 }
469
470 if (wpa_auth->conf.wpa_group_rekey) {
471 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
472 wpa_rekey_gtk, wpa_auth, NULL);
473 }
474
25ef8529
JM		 475#ifdef CONFIG_P2P
476 if (WPA_GET_BE32(conf->ip_addr_start)) {
477 int count = WPA_GET_BE32(conf->ip_addr_end) -
478 WPA_GET_BE32(conf->ip_addr_start) + 1;
479 if (count > 1000)
480 count = 1000;
481 if (count > 0)
482 wpa_auth->ip_pool = bitfield_alloc(count);
483 }
484#endif /* CONFIG_P2P */
485
6fc6879b
JM		 486 return wpa_auth;
487}
488
489
bdffdc5d
JM		 490int wpa_init_keys(struct wpa_authenticator *wpa_auth)
491{
492 struct wpa_group *group = wpa_auth->group;
493
494 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
495 "keys");
496 wpa_group_sm_step(wpa_auth, group);
497 group->GInit = FALSE;
498 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 499 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
500 return -1;
bdffdc5d
JM		 501 return 0;
502}
503
504
6fc6879b
JM		 505/**
506 * wpa_deinit - Deinitialize WPA authenticator
507 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
508 */
509void wpa_deinit(struct wpa_authenticator *wpa_auth)
510{
511 struct wpa_group *group, *prev;
512
513 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
514 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
515
4bb081f1 516 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b 517
4ec1fd8e 518#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 519 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
520 wpa_auth->ft_pmk_cache = NULL;
4ec1fd8e 521#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 522
25ef8529
JM		 523#ifdef CONFIG_P2P
524 bitfield_free(wpa_auth->ip_pool);
525#endif /* CONFIG_P2P */
526
527
6fc6879b
JM		 528 os_free(wpa_auth->wpa_ie);
529
530 group = wpa_auth->group;
531 while (group) {
532 prev = group;
533 group = group->next;
534 os_free(prev);
535 }
536
537 os_free(wpa_auth);
538}
539
540
541/**
542 * wpa_reconfig - Update WPA authenticator configuration
543 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
544 * @conf: Configuration for WPA authenticator
545 */
546int wpa_reconfig(struct wpa_authenticator *wpa_auth,
547 struct wpa_auth_config *conf)
548{
e6965d4e 549 struct wpa_group *group;
6fc6879b
JM		 550 if (wpa_auth == NULL)
551 return 0;
552
553 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 554 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
555 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
556 return -1;
557 }
558
e6965d4e
JM		 559 /*
560 * Reinitialize GTK to make sure it is suitable for the new
561 * configuration.
562 */
563 group = wpa_auth->group;
c3550295 564 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 565 group->GInit = TRUE;
566 wpa_group_sm_step(wpa_auth, group);
567 group->GInit = FALSE;
568 wpa_group_sm_step(wpa_auth, group);
569
6fc6879b
JM		 570 return 0;
571}
572
573
574struct wpa_state_machine *
94ddef3e
JM		 575wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
576 const u8 *p2p_dev_addr)
6fc6879b
JM		 577{
578 struct wpa_state_machine *sm;
579
7d7f7be2
JM		 580 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
581 return NULL;
582
6fc6879b
JM		 583 sm = os_zalloc(sizeof(struct wpa_state_machine));
584 if (sm == NULL)
585 return NULL;
586 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 587 if (p2p_dev_addr)
588 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 589
590 sm->wpa_auth = wpa_auth;
591 sm->group = wpa_auth->group;
a0ad9e8c 592 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 593
594 return sm;
595}
596
597
6f9b5d16
JM		 598int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
599 struct wpa_state_machine *sm)
6fc6879b
JM		 600{
601 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 602 return -1;
6fc6879b 603
4ec1fd8e 604#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 605 if (sm->ft_completed) {
606 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
607 "FT authentication already completed - do not "
608 "start 4-way handshake");
3d4d2348
JM		 609 /* Go to PTKINITDONE state to allow GTK rekeying */
610 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 611 sm->Pair = TRUE;
6f9b5d16 612 return 0;
6fc6879b 613 }
4ec1fd8e 614#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 615
07e0117d
JM		 616#ifdef CONFIG_FILS
617 if (sm->fils_completed) {
618 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
619 "FILS authentication already completed - do not start 4-way handshake");
620 /* Go to PTKINITDONE state to allow GTK rekeying */
621 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 622 sm->Pair = TRUE;
07e0117d
JM		 623 return 0;
624 }
625#endif /* CONFIG_FILS */
626
6fc6879b 627 if (sm->started) {
22a299ee 628 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 629 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 630 return wpa_sm_step(sm);
6fc6879b
JM		 631 }
632
633 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
634 "start authentication");
635 sm->started = 1;
636
637 sm->Init = TRUE;
e4a6ea1d 638 if (wpa_sm_step(sm) == 1)
6f9b5d16 639 return 1; /* should not really happen */
6fc6879b
JM		 640 sm->Init = FALSE;
641 sm->AuthenticationRequest = TRUE;
6f9b5d16 642 return wpa_sm_step(sm);
6fc6879b
JM		 643}
644
645
a8d05fca
JM		 646void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
647{
648 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
649 * reassociates back to the same AP while the previous entry for the
650 * STA has not yet been removed. */
651 if (sm == NULL)
652 return;
653
654 sm->wpa_key_mgmt = 0;
655}
656
657
6fc6879b
JM		 658static void wpa_free_sta_sm(struct wpa_state_machine *sm)
659{
25ef8529
JM		 660#ifdef CONFIG_P2P
661 if (WPA_GET_BE32(sm->ip_addr)) {
662 u32 start;
663 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
664 "address %u.%u.%u.%u from " MACSTR,
665 sm->ip_addr[0], sm->ip_addr[1],
666 sm->ip_addr[2], sm->ip_addr[3],
667 MAC2STR(sm->addr));
668 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
669 bitfield_clear(sm->wpa_auth->ip_pool,
670 WPA_GET_BE32(sm->ip_addr) - start);
671 }
672#endif /* CONFIG_P2P */
2ade8ef2
JM		 673 if (sm->GUpdateStationKeys) {
674 sm->group->GKeyDoneStations--;
675 sm->GUpdateStationKeys = FALSE;
676 }
4ec1fd8e 677#ifdef CONFIG_IEEE80211R_AP
0f857f43 678 os_free(sm->assoc_resp_ftie);
692ec305 679 wpabuf_free(sm->ft_pending_req_ies);
4ec1fd8e 680#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 681 os_free(sm->last_rx_eapol_key);
682 os_free(sm->wpa_ie);
a0ad9e8c 683 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b
JM		 684 os_free(sm);
685}
686
687
688void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
689{
690 if (sm == NULL)
691 return;
692
693 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
694 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
695 "strict rekeying - force GTK rekey since STA "
696 "is leaving");
697 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
698 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
699 NULL);
700 }
701
702 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 703 sm->pending_1_of_4_timeout = 0;
6fc6879b 704 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 705 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 706 if (sm->in_step_loop) {
707 /* Must not free state machine while wpa_sm_step() is running.
708 * Freeing will be completed in the end of wpa_sm_step(). */
709 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
710 "machine deinit for " MACSTR, MAC2STR(sm->addr));
711 sm->pending_deinit = 1;
712 } else
713 wpa_free_sta_sm(sm);
714}
715
716
717static void wpa_request_new_ptk(struct wpa_state_machine *sm)
718{
719 if (sm == NULL)
720 return;
721
722 sm->PTKRequest = TRUE;
723 sm->PTK_valid = 0;
724}
725
726
68921e24 727static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 728 const u8 *replay_counter)
729{
730 int i;
731 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 732 if (!ctr[i].valid)
22a299ee 733 break;
68921e24 734 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 735 WPA_REPLAY_COUNTER_LEN) == 0)
736 return 1;
737 }
738 return 0;
739}
740
741
68921e24
JM		 742static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
743 const u8 *replay_counter)
744{
745 int i;
746 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
747 if (ctr[i].valid &&
748 (replay_counter == NULL ||
749 os_memcmp(replay_counter, ctr[i].counter,
750 WPA_REPLAY_COUNTER_LEN) == 0))
751 ctr[i].valid = FALSE;
752 }
753}
754
755
4ec1fd8e 756#ifdef CONFIG_IEEE80211R_AP
0f857f43
JM		 757static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
758 struct wpa_state_machine *sm,
759 struct wpa_eapol_ie_parse *kde)
760{
761 struct wpa_ie_data ie;
762 struct rsn_mdie *mdie;
763
764 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
765 ie.num_pmkid != 1 || ie.pmkid == NULL) {
766 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
767 "FT 4-way handshake message 2/4");
768 return -1;
769 }
770
771 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
772 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
773 sm->sup_pmk_r1_name, PMKID_LEN);
774
775 if (!kde->mdie || !kde->ftie) {
776 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
777 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
778 return -1;
779 }
780
781 mdie = (struct rsn_mdie *) (kde->mdie + 2);
782 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
783 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
784 MOBILITY_DOMAIN_ID_LEN) != 0) {
785 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
786 return -1;
787 }
788
789 if (sm->assoc_resp_ftie &&
790 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
791 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
792 2 + sm->assoc_resp_ftie[1]) != 0)) {
793 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
794 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
795 kde->ftie, kde->ftie_len);
796 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
797 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
798 return -1;
799 }
800
801 return 0;
802}
4ec1fd8e 803#endif /* CONFIG_IEEE80211R_AP */
0f857f43
JM		 804
805
c772d054
JM		 806static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
807 struct wpa_state_machine *sm, int group)
ec027805
JM		 808{
809 /* Supplicant reported a Michael MIC error */
810 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
811 "received EAPOL-Key Error Request "
812 "(STA detected Michael MIC failure (group=%d))",
813 group);
fbc72d32
JM		 814
815 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
816 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
817 "ignore Michael MIC failure report since "
818 "group cipher is not TKIP");
819 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
820 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
821 "ignore Michael MIC failure report since "
822 "pairwise cipher is not TKIP");
823 } else {
c772d054
JM		 824 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
825 return 1; /* STA entry was removed */
fbc72d32
JM		 826 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
827 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
828 }
ec027805
JM		 829
830 /*
831 * Error report is not a request for a new key handshake, but since
832 * Authenticator may do it, let's change the keys now anyway.
833 */
834 wpa_request_new_ptk(sm);
c772d054 835 return 0;
ec027805
JM		 836}
837
838
f23c5b17
JM		 839static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
840 size_t data_len)
841{
842 struct wpa_ptk PTK;
843 int ok = 0;
844 const u8 *pmk = NULL;
207976f0 845 unsigned int pmk_len;
f23c5b17 846
b729fd8d 847 os_memset(&PTK, 0, sizeof(PTK));
f23c5b17
JM		 848 for (;;) {
849 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
850 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
851 sm->p2p_dev_addr, pmk);
852 if (pmk == NULL)
853 break;
207976f0
JM		 854 pmk_len = PMK_LEN;
855 } else {
f23c5b17 856 pmk = sm->PMK;
207976f0
JM		 857 pmk_len = sm->pmk_len;
858 }
f23c5b17 859
364c064a
JM		 860 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
861 break;
f23c5b17
JM		 862
863 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len)
864 == 0) {
865 ok = 1;
866 break;
867 }
868
869 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
870 break;
871 }
872
873 if (!ok) {
874 wpa_printf(MSG_DEBUG,
875 "WPA: Earlier SNonce did not result in matching MIC");
876 return -1;
877 }
878
879 wpa_printf(MSG_DEBUG,
880 "WPA: Earlier SNonce resulted in matching MIC");
881 sm->alt_snonce_valid = 0;
882 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
883 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
884 sm->PTK_valid = TRUE;
885
886 return 0;
887}
888
889
6fc6879b
JM		 890void wpa_receive(struct wpa_authenticator *wpa_auth,
891 struct wpa_state_machine *sm,
892 u8 *data, size_t data_len)
893{
894 struct ieee802_1x_hdr *hdr;
895 struct wpa_eapol_key *key;
896 u16 key_info, key_data_length;
897 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
898 SMK_M1, SMK_M3, SMK_ERROR } msg;
899 char *msgtxt;
900 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 901 const u8 *key_data;
902 size_t keyhdrlen, mic_len;
6d014ffc 903 u8 *mic;
6fc6879b
JM		 904
905 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
906 return;
dc5bad48 907 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 908
5e3b5197 909 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
6d014ffc 910 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 911
dc5bad48
JM		 912 if (data_len < sizeof(*hdr) + keyhdrlen) {
913 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 914 return;
dc5bad48 915 }
6fc6879b
JM		 916
917 hdr = (struct ieee802_1x_hdr *) data;
918 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 919 mic = (u8 *) (key + 1);
6fc6879b 920 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 921 key_data = mic + mic_len + 2;
922 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 923 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 924 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
925 MAC2STR(sm->addr), key_info, key->type,
926 (unsigned int) mic_len, key_data_length);
927 wpa_hexdump(MSG_MSGDUMP,
928 "WPA: EAPOL-Key header (ending before Key MIC)",
929 key, sizeof(*key));
930 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
931 mic, mic_len);
5e3b5197 932 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 933 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
934 "key_data overflow (%d > %lu)",
935 key_data_length,
936 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 937 keyhdrlen));
6fc6879b
JM		 938 return;
939 }
940
f8e96eb6 941 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 942 if (key->type == EAPOL_KEY_TYPE_WPA) {
943 /*
944 * Some deployed station implementations seem to send
945 * msg 4/4 with incorrect type value in WPA2 mode.
946 */
947 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
948 "with unexpected WPA type in RSN mode");
949 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 950 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
951 "unexpected type %d in RSN mode",
952 key->type);
953 return;
954 }
955 } else {
956 if (key->type != EAPOL_KEY_TYPE_WPA) {
957 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
958 "unexpected type %d in WPA mode",
959 key->type);
960 return;
961 }
962 }
963
bc8318ac
JM		 964 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
965 WPA_NONCE_LEN);
966 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
967 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
968
6fc6879b
JM		 969 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
970 * are set */
971
972 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
973 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
974 if (key_info & WPA_KEY_INFO_ERROR) {
975 msg = SMK_ERROR;
976 msgtxt = "SMK Error";
977 } else {
978 msg = SMK_M1;
979 msgtxt = "SMK M1";
980 }
981 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
982 msg = SMK_M3;
983 msgtxt = "SMK M3";
984 } else if (key_info & WPA_KEY_INFO_REQUEST) {
985 msg = REQUEST;
986 msgtxt = "Request";
987 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
988 msg = GROUP_2;
989 msgtxt = "2/2 Group";
3b5b7aa8
JM		 990 } else if (key_data_length == 0 ||
991 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
992 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 993 msg = PAIRWISE_4;
994 msgtxt = "4/4 Pairwise";
995 } else {
996 msg = PAIRWISE_2;
997 msgtxt = "2/4 Pairwise";
998 }
999
1000 /* TODO: key_info type validation for PeerKey */
1001 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1002 msg == GROUP_2) {
1003 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 1004 if (sm->pairwise == WPA_CIPHER_CCMP ||
1005 sm->pairwise == WPA_CIPHER_GCMP) {
6fc6879b 1006 if (wpa_use_aes_cmac(sm) &&
a14896e8 1007 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
929a2ea5 1008 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
b9866483 1009 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1010 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1011 wpa_auth_logger(wpa_auth, sm->addr,
1012 LOGGER_WARNING,
1013 "advertised support for "
1014 "AES-128-CMAC, but did not "
1015 "use it");
1016 return;
1017 }
1018
1019 if (!wpa_use_aes_cmac(sm) &&
2449791b 1020 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
07a5fe82 1021 sm->wpa_key_mgmt != WPA_KEY_MGMT_OWE &&
6fc6879b
JM		 1022 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1023 wpa_auth_logger(wpa_auth, sm->addr,
1024 LOGGER_WARNING,
1025 "did not use HMAC-SHA1-AES "
eb7719ff 1026 "with CCMP/GCMP");
6fc6879b
JM		 1027 return;
1028 }
1029 }
929a2ea5 1030
2449791b 1031 if ((wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
07a5fe82
JM		 1032 wpa_key_mgmt_fils(sm->wpa_key_mgmt) ||
1033 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) &&
929a2ea5
JM		 1034 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1035 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1036 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1037 return;
1038 }
6fc6879b
JM		 1039 }
1040
1041 if (key_info & WPA_KEY_INFO_REQUEST) {
1042 if (sm->req_replay_counter_used &&
1043 os_memcmp(key->replay_counter, sm->req_replay_counter,
1044 WPA_REPLAY_COUNTER_LEN) <= 0) {
1045 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1046 "received EAPOL-Key request with "
1047 "replayed counter");
1048 return;
1049 }
1050 }
1051
1052 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1053 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1054 int i;
68921e24
JM		 1055
1056 if (msg == PAIRWISE_2 &&
1057 wpa_replay_counter_valid(sm->prev_key_replay,
1058 key->replay_counter) &&
1059 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1060 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1061 {
1062 /*
1063 * Some supplicant implementations (e.g., Windows XP
1064 * WZC) update SNonce for each EAPOL-Key 2/4. This
1065 * breaks the workaround on accepting any of the
1066 * pending requests, so allow the SNonce to be updated
1067 * even if we have already sent out EAPOL-Key 3/4.
1068 */
1069 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1070 "Process SNonce update from STA "
1071 "based on retransmitted EAPOL-Key "
1072 "1/4");
1073 sm->update_snonce = 1;
f23c5b17
JM		 1074 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1075 sm->alt_snonce_valid = TRUE;
1076 os_memcpy(sm->alt_replay_counter,
1077 sm->key_replay[0].counter,
1078 WPA_REPLAY_COUNTER_LEN);
1079 goto continue_processing;
1080 }
1081
1082 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1083 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1084 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1085 WPA_REPLAY_COUNTER_LEN) == 0) {
1086 /*
1087 * Supplicant may still be using the old SNonce since
1088 * there was two EAPOL-Key 2/4 messages and they had
1089 * different SNonce values.
1090 */
1091 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1092 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1093 goto continue_processing;
1094 }
1095
1096 if (msg == PAIRWISE_2 &&
1097 wpa_replay_counter_valid(sm->prev_key_replay,
1098 key->replay_counter) &&
1099 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1100 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1101 "ignore retransmitted EAPOL-Key %s - "
1102 "SNonce did not change", msgtxt);
1103 } else {
1104 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1105 "received EAPOL-Key %s with "
1106 "unexpected replay counter", msgtxt);
1107 }
22a299ee
JM		 1108 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1109 if (!sm->key_replay[i].valid)
1110 break;
1111 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1112 sm->key_replay[i].counter,
1113 WPA_REPLAY_COUNTER_LEN);
1114 }
6fc6879b
JM		 1115 wpa_hexdump(MSG_DEBUG, "received replay counter",
1116 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1117 return;
1118 }
1119
68921e24 1120continue_processing:
3b5b7aa8
JM		 1121#ifdef CONFIG_FILS
1122 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1123 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1124 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1125 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1126 return;
1127 }
1128#endif /* CONFIG_FILS */
1129
6fc6879b
JM		 1130 switch (msg) {
1131 case PAIRWISE_2:
1132 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1133 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1134 (!sm->update_snonce ||
1135 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1136 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1137 "received EAPOL-Key msg 2/4 in "
1138 "invalid state (%d) - dropped",
1139 sm->wpa_ptk_state);
1140 return;
1141 }
bbb921da 1142 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1143 if (sm->group->reject_4way_hs_for_entropy) {
1144 /*
1145 * The system did not have enough entropy to generate
1146 * strong random numbers. Reject the first 4-way
1147 * handshake(s) and collect some entropy based on the
1148 * information from it. Once enough entropy is
1149 * available, the next atempt will trigger GMK/Key
1150 * Counter update and the station will be allowed to
1151 * continue.
1152 */
1153 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1154 "collect more entropy for random number "
1155 "generation");
08704cd8 1156 random_mark_pool_ready();
08704cd8
JM		 1157 wpa_sta_disconnect(wpa_auth, sm->addr);
1158 return;
1159 }
6fc6879b
JM		 1160 break;
1161 case PAIRWISE_4:
1162 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1163 !sm->PTK_valid) {
1164 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1165 "received EAPOL-Key msg 4/4 in "
1166 "invalid state (%d) - dropped",
1167 sm->wpa_ptk_state);
1168 return;
1169 }
1170 break;
1171 case GROUP_2:
1172 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1173 || !sm->PTK_valid) {
1174 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1175 "received EAPOL-Key msg 2/2 in "
1176 "invalid state (%d) - dropped",
1177 sm->wpa_ptk_group_state);
1178 return;
1179 }
1180 break;
1181#ifdef CONFIG_PEERKEY
1182 case SMK_M1:
1183 case SMK_M3:
1184 case SMK_ERROR:
1185 if (!wpa_auth->conf.peerkey) {
1186 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1187 "PeerKey use disabled - ignoring message");
1188 return;
1189 }
1190 if (!sm->PTK_valid) {
1191 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1192 "received EAPOL-Key msg SMK in "
1193 "invalid state - dropped");
1194 return;
1195 }
1196 break;
1197#else /* CONFIG_PEERKEY */
1198 case SMK_M1:
1199 case SMK_M3:
1200 case SMK_ERROR:
1201 return; /* STSL disabled - ignore SMK messages */
1202#endif /* CONFIG_PEERKEY */
1203 case REQUEST:
1204 break;
1205 }
1206
1207 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1208 "received EAPOL-Key frame (%s)", msgtxt);
1209
1210 if (key_info & WPA_KEY_INFO_ACK) {
1211 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1212 "received invalid EAPOL-Key: Key Ack set");
1213 return;
1214 }
1215
b9866483
JM		 1216 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1217 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1218 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1219 "received invalid EAPOL-Key: Key MIC not set");
1220 return;
1221 }
1222
b9866483
JM		 1223#ifdef CONFIG_FILS
1224 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1225 (key_info & WPA_KEY_INFO_MIC)) {
1226 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1227 "received invalid EAPOL-Key: Key MIC set");
1228 return;
1229 }
1230#endif /* CONFIG_FILS */
1231
6fc6879b 1232 sm->MICVerified = FALSE;
68921e24 1233 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8
JM		 1234 if (mic_len &&
1235 wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data,
f23c5b17
JM		 1236 data_len) &&
1237 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1238 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1239 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1240 "received EAPOL-Key with invalid MIC");
1241 return;
1242 }
75c8563e
JM		 1243#ifdef CONFIG_FILS
1244 if (!mic_len &&
1245 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1246 &key_data_length) < 0) {
1247 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1248 "received EAPOL-Key with invalid MIC");
1249 return;
1250 }
1251#endif /* CONFIG_FILS */
6fc6879b
JM		 1252 sm->MICVerified = TRUE;
1253 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1254 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1255 }
1256
1257 if (key_info & WPA_KEY_INFO_REQUEST) {
1258 if (sm->MICVerified) {
1259 sm->req_replay_counter_used = 1;
1260 os_memcpy(sm->req_replay_counter, key->replay_counter,
1261 WPA_REPLAY_COUNTER_LEN);
1262 } else {
1263 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1264 "received EAPOL-Key request with "
1265 "invalid MIC");
1266 return;
1267 }
1268
1269 /*
1270 * TODO: should decrypt key data field if encryption was used;
1271 * even though MAC address KDE is not normally encrypted,
1272 * supplicant is allowed to encrypt it.
1273 */
1274 if (msg == SMK_ERROR) {
1275#ifdef CONFIG_PEERKEY
5e3b5197 1276 wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
6fc6879b
JM		 1277#endif /* CONFIG_PEERKEY */
1278 return;
1279 } else if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1280 if (wpa_receive_error_report(
1281 wpa_auth, sm,
1282 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1283 return; /* STA entry was removed */
6fc6879b
JM		 1284 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1285 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1286 "received EAPOL-Key Request for new "
1287 "4-Way Handshake");
1288 wpa_request_new_ptk(sm);
1289#ifdef CONFIG_PEERKEY
1290 } else if (msg == SMK_M1) {
5e3b5197 1291 wpa_smk_m1(wpa_auth, sm, key, key_data,
5c6787a6 1292 key_data_length);
6fc6879b
JM		 1293#endif /* CONFIG_PEERKEY */
1294 } else if (key_data_length > 0 &&
5e3b5197
JM		 1295 wpa_parse_kde_ies(key_data, key_data_length,
1296 &kde) == 0 &&
6fc6879b
JM		 1297 kde.mac_addr) {
1298 } else {
1299 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1300 "received EAPOL-Key Request for GTK "
1301 "rekeying");
6fc6879b
JM		 1302 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1303 wpa_rekey_gtk(wpa_auth, NULL);
1304 }
1305 } else {
68921e24
JM		 1306 /* Do not allow the same key replay counter to be reused. */
1307 wpa_replay_counter_mark_invalid(sm->key_replay,
1308 key->replay_counter);
1309
1310 if (msg == PAIRWISE_2) {
1311 /*
1312 * Maintain a copy of the pending EAPOL-Key frames in
1313 * case the EAPOL-Key frame was retransmitted. This is
1314 * needed to allow EAPOL-Key msg 2/4 reply to another
1315 * pending msg 1/4 to update the SNonce to work around
1316 * unexpected supplicant behavior.
1317 */
1318 os_memcpy(sm->prev_key_replay, sm->key_replay,
1319 sizeof(sm->key_replay));
1320 } else {
1321 os_memset(sm->prev_key_replay, 0,
1322 sizeof(sm->prev_key_replay));
1323 }
1324
1325 /*
1326 * Make sure old valid counters are not accepted anymore and
1327 * do not get copied again.
1328 */
1329 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1330 }
1331
1332#ifdef CONFIG_PEERKEY
1333 if (msg == SMK_M3) {
5e3b5197 1334 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
6fc6879b
JM		 1335 return;
1336 }
1337#endif /* CONFIG_PEERKEY */
1338
1339 os_free(sm->last_rx_eapol_key);
a1f11e34 1340 sm->last_rx_eapol_key = os_memdup(data, data_len);
6fc6879b
JM		 1341 if (sm->last_rx_eapol_key == NULL)
1342 return;
6fc6879b
JM		 1343 sm->last_rx_eapol_key_len = data_len;
1344
0d442aff 1345 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1346 sm->EAPOLKeyReceived = TRUE;
1347 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1348 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1349 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1350 wpa_sm_step(sm);
1351}
1352
1353
3c7302c2
JM		 1354static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1355 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1356{
5cb9d5c3
JM		 1357 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1358 u8 *pos;
3c7302c2 1359 int ret = 0;
6fc6879b 1360
5cb9d5c3
JM		 1361 /* GTK = PRF-X(GMK, "Group key expansion",
1362 * AA || GNonce || Time || random data)
1363 * The example described in the IEEE 802.11 standard uses only AA and
1364 * GNonce as inputs here. Add some more entropy since this derivation
1365 * is done only at the Authenticator and as such, does not need to be
1366 * exactly same.
1367 */
6fc6879b
JM		 1368 os_memcpy(data, addr, ETH_ALEN);
1369 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1370 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1371 wpa_get_ntp_timestamp(pos);
1372 pos += 8;
3642c431 1373 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1374 ret = -1;
6fc6879b 1375
56586197 1376#ifdef CONFIG_IEEE80211W
5cb9d5c3 1377 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1378#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1379 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1380 < 0)
1381 ret = -1;
56586197 1382#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1383
1384 return ret;
6fc6879b
JM		 1385}
1386
1387
1388static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1389{
1390 struct wpa_authenticator *wpa_auth = eloop_ctx;
1391 struct wpa_state_machine *sm = timeout_ctx;
1392
e4bf4db9 1393 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1394 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1395 sm->TimeoutEvt = TRUE;
1396 wpa_sm_step(sm);
1397}
1398
1399
1400void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1401 struct wpa_state_machine *sm, int key_info,
1402 const u8 *key_rsc, const u8 *nonce,
1403 const u8 *kde, size_t kde_len,
1404 int keyidx, int encr, int force_version)
1405{
1406 struct ieee802_1x_hdr *hdr;
1407 struct wpa_eapol_key *key;
5e3b5197 1408 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1409 int alg;
1410 int key_data_len, pad_len = 0;
1411 u8 *buf, *pos;
1412 int version, pairwise;
22a299ee 1413 int i;
6d014ffc 1414 u8 *key_mic, *key_data;
6fc6879b 1415
5e3b5197 1416 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
6d014ffc 1417 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1418
1419 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1420
1421 if (force_version)
1422 version = force_version;
929a2ea5 1423 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
07a5fe82 1424 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
36a50fd4
JM		 1425 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1426 wpa_key_mgmt_fils(sm->wpa_key_mgmt))
a14896e8 1427 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
6fc6879b
JM		 1428 else if (wpa_use_aes_cmac(sm))
1429 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1430 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1431 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1432 else
1433 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1434
8543ed8a 1435 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1436
1437 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1438 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1439 "encr=%d)",
1440 version,
1441 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1442 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1443 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1444 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1445 pairwise, (unsigned long) kde_len, keyidx, encr);
1446
1447 key_data_len = kde_len;
1448
1449 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
07a5fe82 1450 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
a14896e8 1451 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1452 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1453 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1454 pad_len = key_data_len % 8;
1455 if (pad_len)
1456 pad_len = 8 - pad_len;
1457 key_data_len += pad_len + 8;
1458 }
1459
1460 len += key_data_len;
b729fd8d
JM		 1461 if (!mic_len && encr)
1462 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1463
1464 hdr = os_zalloc(len);
1465 if (hdr == NULL)
1466 return;
1467 hdr->version = wpa_auth->conf.eapol_version;
1468 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1469 hdr->length = host_to_be16(len - sizeof(*hdr));
1470 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1471 key_mic = (u8 *) (key + 1);
5e3b5197 1472 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1473
1474 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1475 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1476 key_info |= version;
1477 if (encr && sm->wpa == WPA_VERSION_WPA2)
1478 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1479 if (sm->wpa != WPA_VERSION_WPA2)
1480 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1481 WPA_PUT_BE16(key->key_info, key_info);
1482
1483 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
caab23f1
JM		 1484 if ((key_info & WPA_KEY_INFO_SMK_MESSAGE) ||
1485 (sm->wpa == WPA_VERSION_WPA2 && !pairwise))
6fc6879b 1486 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1487 else
1488 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b
JM		 1489
1490 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1491 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1492 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1493 os_memcpy(sm->key_replay[i].counter,
1494 sm->key_replay[i - 1].counter,
1495 WPA_REPLAY_COUNTER_LEN);
1496 }
1497 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1498 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1499 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1500 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1501 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1502 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1503
1504 if (nonce)
1505 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1506
1507 if (key_rsc)
1508 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1509
1510 if (kde && !encr) {
5e3b5197 1511 os_memcpy(key_data, kde, kde_len);
6d014ffc 1512 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d
JM		 1513#ifdef CONFIG_FILS
1514 } else if (!mic_len) {
1515 const u8 *aad[1];
1516 size_t aad_len[1];
1517
1518 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1519 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1520 kde, kde_len);
1521
1522 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1523 sm->PTK.kek, sm->PTK.kek_len);
1524 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1525 * to Key Data (exclusive). */
1526 aad[0] = (u8 *) hdr;
1527 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1528 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1529 1, aad, aad_len, key_mic + 2) < 0) {
1530 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1531 return;
1532 }
1533
1534 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1535 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1536#endif /* CONFIG_FILS */
6fc6879b
JM		 1537 } else if (encr && kde) {
1538 buf = os_zalloc(key_data_len);
1539 if (buf == NULL) {
1540 os_free(hdr);
1541 return;
1542 }
1543 pos = buf;
1544 os_memcpy(pos, kde, kde_len);
1545 pos += kde_len;
1546
1547 if (pad_len)
1548 *pos++ = 0xdd;
1549
1550 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1551 buf, key_data_len);
1552 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
07a5fe82 1553 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
a14896e8 1554 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1555 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b 1556 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
ef9627cb
JM		 1557 wpa_printf(MSG_DEBUG,
1558 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1559 (unsigned int) sm->PTK.kek_len);
98cd3d1c 1560 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1561 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1562 os_free(hdr);
1563 os_free(buf);
1564 return;
1565 }
6d014ffc 1566 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1567#ifndef CONFIG_NO_RC4
98cd3d1c 1568 } else if (sm->PTK.kek_len == 16) {
6fc6879b 1569 u8 ek[32];
ef9627cb
JM		 1570
1571 wpa_printf(MSG_DEBUG,
1572 "WPA: Encrypt Key Data using RC4");
6fc6879b
JM		 1573 os_memcpy(key->key_iv,
1574 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1575 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1576 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1577 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1578 os_memcpy(key_data, buf, key_data_len);
1579 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1580 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1581#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1582 } else {
1583 os_free(hdr);
1584 os_free(buf);
1585 return;
6fc6879b
JM		 1586 }
1587 os_free(buf);
1588 }
1589
1590 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1591 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1592 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1593 "PTK not valid when sending EAPOL-Key "
1594 "frame");
1595 os_free(hdr);
1596 return;
1597 }
5e3b5197 1598
98cd3d1c
JM		 1599 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1600 sm->wpa_key_mgmt, version,
5e3b5197 1601 (u8 *) hdr, len, key_mic);
7af092a0
JB		 1602#ifdef CONFIG_TESTING_OPTIONS
1603 if (!pairwise &&
06df2aa6 1604 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1605 drand48() <
1606 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1607 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1608 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1609 key_mic[0]++;
7af092a0
JB		 1610 }
1611#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1612 }
1613
1614 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1615 1);
1616 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1617 sm->pairwise_set);
1618 os_free(hdr);
1619}
1620
1621
1622static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1623 struct wpa_state_machine *sm, int key_info,
1624 const u8 *key_rsc, const u8 *nonce,
1625 const u8 *kde, size_t kde_len,
1626 int keyidx, int encr)
1627{
1628 int timeout_ms;
1629 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1630 u32 ctr;
6fc6879b
JM		 1631
1632 if (sm == NULL)
1633 return;
1634
1635 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1636 keyidx, encr, 0);
1637
bae61562 1638 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1639 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1640 timeout_ms = pairwise ? eapol_key_timeout_first :
1641 eapol_key_timeout_first_group;
bae61562
JM		 1642 else
1643 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1644 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1645 sm->pending_1_of_4_timeout = 1;
1646 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1647 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1648 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1649 wpa_send_eapol_timeout, wpa_auth, sm);
1650}
1651
1652
929a2ea5
JM		 1653static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
1654 size_t data_len)
6fc6879b
JM		 1655{
1656 struct ieee802_1x_hdr *hdr;
1657 struct wpa_eapol_key *key;
1658 u16 key_info;
1659 int ret = 0;
6d014ffc 1660 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
5e3b5197 1661 size_t mic_len = wpa_mic_len(akmp);
6fc6879b
JM		 1662
1663 if (data_len < sizeof(*hdr) + sizeof(*key))
1664 return -1;
1665
1666 hdr = (struct ieee802_1x_hdr *) data;
1667 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1668 mic_pos = (u8 *) (key + 1);
6fc6879b 1669 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1670 os_memcpy(mic, mic_pos, mic_len);
1671 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1672 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1673 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1674 data, data_len, mic_pos) ||
1675 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1676 ret = -1;
6d014ffc 1677 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1678 return ret;
1679}
1680
1681
1682void wpa_remove_ptk(struct wpa_state_machine *sm)
1683{
1684 sm->PTK_valid = FALSE;
1685 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1686 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1687 0))
1688 wpa_printf(MSG_DEBUG,
1689 "RSN: PTK removal from the driver failed");
6fc6879b 1690 sm->pairwise_set = FALSE;
581a8cde 1691 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1692}
1693
1694
bb119228 1695int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1696{
5d22a1d5
JM		 1697 int remove_ptk = 1;
1698
6fc6879b 1699 if (sm == NULL)
6f9b5d16 1700 return -1;
6fc6879b
JM		 1701
1702 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1703 "event %d notification", event);
1704
1705 switch (event) {
1706 case WPA_AUTH:
c50d94f1
BC		 1707#ifdef CONFIG_MESH
1708 /* PTKs are derived through AMPE */
1709 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1710 /* not mesh */
1711 break;
1712 }
1713 return 0;
1714#endif /* CONFIG_MESH */
6fc6879b
JM		 1715 case WPA_ASSOC:
1716 break;
1717 case WPA_DEAUTH:
1718 case WPA_DISASSOC:
1719 sm->DeauthenticationRequest = TRUE;
1720 break;
1721 case WPA_REAUTH:
1722 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1723 if (!sm->started) {
1724 /*
1725 * When using WPS, we may end up here if the STA
1726 * manages to re-associate without the previous STA
1727 * entry getting removed. Consequently, we need to make
1728 * sure that the WPA state machines gets initialized
1729 * properly at this point.
1730 */
1731 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1732 "started - initialize now");
1733 sm->started = 1;
1734 sm->Init = TRUE;
1735 if (wpa_sm_step(sm) == 1)
1736 return 1; /* should not really happen */
1737 sm->Init = FALSE;
1738 sm->AuthenticationRequest = TRUE;
1739 break;
1740 }
9663596f
JM		 1741 if (sm->GUpdateStationKeys) {
1742 /*
1743 * Reauthentication cancels the pending group key
1744 * update for this STA.
1745 */
1746 sm->group->GKeyDoneStations--;
1747 sm->GUpdateStationKeys = FALSE;
1748 sm->PtkGroupInit = TRUE;
1749 }
6fc6879b
JM		 1750 sm->ReAuthenticationRequest = TRUE;
1751 break;
1752 case WPA_ASSOC_FT:
4ec1fd8e 1753#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1754 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1755 "after association");
1756 wpa_ft_install_ptk(sm);
1757
6fc6879b
JM		 1758 /* Using FT protocol, not WPA auth state machine */
1759 sm->ft_completed = 1;
6f9b5d16 1760 return 0;
4ec1fd8e 1761#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1762 break;
4ec1fd8e 1763#endif /* CONFIG_IEEE80211R_AP */
957bff83
JM		 1764 case WPA_ASSOC_FILS:
1765#ifdef CONFIG_FILS
1766 wpa_printf(MSG_DEBUG,
1767 "FILS: TK configuration after association");
1768 fils_set_tk(sm);
1769 sm->fils_completed = 1;
1770 return 0;
1771#else /* CONFIG_FILS */
1772 break;
1773#endif /* CONFIG_FILS */
6fc6879b
JM		 1774 }
1775
4ec1fd8e 1776#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1777 sm->ft_completed = 0;
4ec1fd8e 1778#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1779
5d22a1d5
JM		 1780#ifdef CONFIG_IEEE80211W
1781 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1782 remove_ptk = 0;
1783#endif /* CONFIG_IEEE80211W */
78815f3d 1784#ifdef CONFIG_FILS
da24c5aa
JM		 1785 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1786 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1787 remove_ptk = 0;
1788#endif /* CONFIG_FILS */
6fc6879b 1789
5d22a1d5
JM		 1790 if (remove_ptk) {
1791 sm->PTK_valid = FALSE;
1792 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1793
1794 if (event != WPA_REAUTH_EAPOL)
1795 wpa_remove_ptk(sm);
1796 }
6fc6879b 1797
43f49c37
JM		 1798 if (sm->in_step_loop) {
1799 /*
1800 * wpa_sm_step() is already running - avoid recursive call to
1801 * it by making the existing loop process the new update.
1802 */
1803 sm->changed = TRUE;
1804 return 0;
1805 }
6f9b5d16 1806 return wpa_sm_step(sm);
6fc6879b
JM		 1807}
1808
1809
6fc6879b
JM		 1810SM_STATE(WPA_PTK, INITIALIZE)
1811{
1812 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1813 if (sm->Init) {
1814 /* Init flag is not cleared here, so avoid busy
1815 * loop by claiming nothing changed. */
1816 sm->changed = FALSE;
1817 }
1818
1819 sm->keycount = 0;
1820 if (sm->GUpdateStationKeys)
1821 sm->group->GKeyDoneStations--;
1822 sm->GUpdateStationKeys = FALSE;
1823 if (sm->wpa == WPA_VERSION_WPA)
1824 sm->PInitAKeys = FALSE;
1825 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1826 * Local AA > Remote AA)) */) {
1827 sm->Pair = TRUE;
1828 }
1829 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1830 wpa_remove_ptk(sm);
1831 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1832 sm->TimeoutCtr = 0;
a1ea1b45
JM		 1833 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
1834 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 1835 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1836 WPA_EAPOL_authorized, 0);
1837 }
1838}
1839
1840
1841SM_STATE(WPA_PTK, DISCONNECT)
1842{
1843 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1844 sm->Disconnect = FALSE;
1845 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1846}
1847
1848
1849SM_STATE(WPA_PTK, DISCONNECTED)
1850{
1851 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1852 sm->DeauthenticationRequest = FALSE;
1853}
1854
1855
1856SM_STATE(WPA_PTK, AUTHENTICATION)
1857{
1858 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1859 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1860 sm->PTK_valid = FALSE;
1861 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1862 1);
1863 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1864 sm->AuthenticationRequest = FALSE;
1865}
1866
1867
40d00d2b
NC		 1868static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1869 struct wpa_group *group)
1bdb7ab3 1870{
40d00d2b
NC		 1871 if (group->first_sta_seen)
1872 return;
1bdb7ab3
JM		 1873 /*
1874 * System has run bit further than at the time hostapd was started
1875 * potentially very early during boot up. This provides better chances
1876 * of collecting more randomness on embedded systems. Re-initialize the
1877 * GMK and Counter here to improve their strength if there was not
1878 * enough entropy available immediately after system startup.
1879 */
1880 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1881 "station");
08704cd8
JM		 1882 if (random_pool_ready() != 1) {
1883 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1884 "to proceed - reject first 4-way handshake");
1885 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1886 } else {
1887 group->first_sta_seen = TRUE;
1888 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1889 }
40d00d2b 1890
aac1efec
JM		 1891 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1892 wpa_gtk_update(wpa_auth, group) < 0 ||
1893 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1894 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1895 group->first_sta_seen = FALSE;
1896 group->reject_4way_hs_for_entropy = TRUE;
1897 }
1bdb7ab3
JM		 1898}
1899
1900
6fc6879b
JM		 1901SM_STATE(WPA_PTK, AUTHENTICATION2)
1902{
1903 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1904
40d00d2b 1905 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1906 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1907
3825a19b
JM		 1908 /*
1909 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1910 * ambiguous. The Authenticator state machine uses a counter that is
1911 * incremented by one for each 4-way handshake. However, the security
1912 * analysis of 4-way handshake points out that unpredictable nonces
1913 * help in preventing precomputation attacks. Instead of the state
1914 * machine definition, use an unpredictable nonce value here to provide
1915 * stronger protection against potential precomputation attacks.
1916 */
1917 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1918 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1919 "ANonce.");
65a32cdb 1920 sm->Disconnect = TRUE;
3825a19b
JM		 1921 return;
1922 }
bc8318ac
JM		 1923 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1924 WPA_NONCE_LEN);
6fc6879b
JM		 1925 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1926 * logical place than INITIALIZE since AUTHENTICATION2 can be
1927 * re-entered on ReAuthenticationRequest without going through
1928 * INITIALIZE. */
1929 sm->TimeoutCtr = 0;
1930}
1931
1932
1933SM_STATE(WPA_PTK, INITPMK)
1934{
1935 u8 msk[2 * PMK_LEN];
1936 size_t len = 2 * PMK_LEN;
1937
1938 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1939#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1940 sm->xxkey_len = 0;
4ec1fd8e 1941#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1942 if (sm->pmksa) {
1943 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1944 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1945 sm->pmk_len = sm->pmksa->pmk_len;
6fc6879b 1946 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1947 unsigned int pmk_len;
1948
834c5d68 1949 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
207976f0
JM		 1950 pmk_len = PMK_LEN_SUITE_B_192;
1951 else
1952 pmk_len = PMK_LEN;
6fc6879b 1953 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1954 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1955 pmk_len);
1956 if (len < pmk_len) {
1957 wpa_printf(MSG_DEBUG,
1958 "WPA: MSK not long enough (%u) to create PMK (%u)",
1959 (unsigned int) len, (unsigned int) pmk_len);
1960 sm->Disconnect = TRUE;
1961 return;
1962 }
1963 os_memcpy(sm->PMK, msk, pmk_len);
1964 sm->pmk_len = pmk_len;
4ec1fd8e 1965#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 1966 if (len >= 2 * PMK_LEN) {
1967 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1968 sm->xxkey_len = PMK_LEN;
1969 }
4ec1fd8e 1970#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1971 } else {
400de9b1 1972 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 1973 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 1974 sm->Disconnect = TRUE;
1975 return;
6fc6879b 1976 }
40aaa64f 1977 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 1978
1979 sm->req_replay_counter_used = 0;
1980 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1981 * will break reauthentication since EAPOL state machines may not be
1982 * get into AUTHENTICATING state that clears keyRun before WPA state
1983 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1984 * state and takes PMK from the previously used AAA Key. This will
1985 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1986 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1987 * be good workaround for this issue. */
1988 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1989}
1990
1991
1992SM_STATE(WPA_PTK, INITPSK)
1993{
1994 const u8 *psk;
1995 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
759fd76b 1996 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
6fc6879b
JM		 1997 if (psk) {
1998 os_memcpy(sm->PMK, psk, PMK_LEN);
207976f0 1999 sm->pmk_len = PMK_LEN;
4ec1fd8e 2000#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 2001 os_memcpy(sm->xxkey, psk, PMK_LEN);
2002 sm->xxkey_len = PMK_LEN;
4ec1fd8e 2003#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2004 }
2005 sm->req_replay_counter_used = 0;
2006}
2007
2008
2009SM_STATE(WPA_PTK, PTKSTART)
2010{
2011 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2012 size_t pmkid_len = 0;
2013
2014 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2015 sm->PTKRequest = FALSE;
2016 sm->TimeoutEvt = FALSE;
f23c5b17 2017 sm->alt_snonce_valid = FALSE;
bae61562
JM		 2018
2019 sm->TimeoutCtr++;
41f140d3 2020 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2021 /* No point in sending the EAPOL-Key - we will disconnect
2022 * immediately following this. */
2023 return;
2024 }
2025
6fc6879b
JM		 2026 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2027 "sending 1/4 msg of 4-Way Handshake");
2028 /*
2029 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
2030 * one possible PSK for this STA.
2031 */
2032 if (sm->wpa == WPA_VERSION_WPA2 &&
a14896e8
JM		 2033 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
2034 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2035 pmkid = buf;
2036 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2037 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2038 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2039 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2040 if (sm->pmksa) {
6fc6879b
JM		 2041 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2042 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2043 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2044 /* No KCK available to derive PMKID */
2045 pmkid = NULL;
2046 } else {
6fc6879b
JM		 2047 /*
2048 * Calculate PMKID since no PMKSA cache entry was
2049 * available with pre-calculated PMKID.
2050 */
207976f0 2051 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197
JM		 2052 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2053 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 2054 }
2055 }
2056 wpa_send_eapol(sm->wpa_auth, sm,
2057 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2058 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2059}
2060
2061
f23c5b17 2062static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2063 const u8 *pmk, unsigned int pmk_len,
2064 struct wpa_ptk *ptk)
6fc6879b 2065{
4ec1fd8e 2066#ifdef CONFIG_IEEE80211R_AP
56586197 2067 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
98cd3d1c 2068 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
4ec1fd8e 2069#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2070
207976f0 2071 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c
JM		 2072 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2073 ptk, sm->wpa_key_mgmt, sm->pairwise);
6fc6879b
JM		 2074}
2075
2076
3b5b7aa8 2077#ifdef CONFIG_FILS
c4fd6d8a
JM		 2078
2079int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
2080 size_t pmk_len, const u8 *snonce, const u8 *anonce)
2081{
2082 u8 ick[FILS_ICK_MAX_LEN];
2083 size_t ick_len;
2084 int res;
2085
2086 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
2087 snonce, anonce, &sm->PTK, ick, &ick_len,
2088 sm->wpa_key_mgmt, sm->pairwise);
2089 if (res < 0)
2090 return res;
2091 sm->PTK_valid = TRUE;
2092
2093 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2094 sm->addr, sm->wpa_auth->addr,
2095 NULL, 0, NULL, 0, /* TODO: SK+PFS */
2096 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2097 sm->fils_key_auth_ap,
2098 &sm->fils_key_auth_len);
2099 os_memset(ick, 0, sizeof(ick));
78815f3d
JM		 2100
2101 /* Store nonces for (Re)Association Request/Response frame processing */
2102 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2103 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2104
c4fd6d8a
JM		 2105 return res;
2106}
2107
2108
3b5b7aa8 2109static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2110 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2111{
2112 struct ieee802_1x_hdr *hdr;
2113 struct wpa_eapol_key *key;
2114 u8 *pos;
2115 u16 key_data_len;
2116 u8 *tmp;
2117 const u8 *aad[1];
2118 size_t aad_len[1];
2119
75c8563e 2120 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2121 key = (struct wpa_eapol_key *) (hdr + 1);
2122 pos = (u8 *) (key + 1);
2123 key_data_len = WPA_GET_BE16(pos);
2124 if (key_data_len < AES_BLOCK_SIZE ||
2125 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2126 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2127 "No room for AES-SIV data in the frame");
2128 return -1;
2129 }
2130 pos += 2; /* Pointing at the Encrypted Key Data field */
2131
2132 tmp = os_malloc(key_data_len);
2133 if (!tmp)
2134 return -1;
2135
2136 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2137 * to Key Data (exclusive). */
75c8563e
JM		 2138 aad[0] = buf;
2139 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2140 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2141 1, aad, aad_len, tmp) < 0) {
2142 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2143 "Invalid AES-SIV data in the frame");
2144 bin_clear_free(tmp, key_data_len);
2145 return -1;
2146 }
2147
2148 /* AEAD decryption and validation completed successfully */
2149 key_data_len -= AES_BLOCK_SIZE;
2150 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2151 tmp, key_data_len);
2152
2153 /* Replace Key Data field with the decrypted version */
2154 os_memcpy(pos, tmp, key_data_len);
2155 pos -= 2; /* Key Data Length field */
2156 WPA_PUT_BE16(pos, key_data_len);
2157 bin_clear_free(tmp, key_data_len);
2158 if (_key_data_len)
2159 *_key_data_len = key_data_len;
2160 return 0;
2161}
78815f3d
JM		 2162
2163
087631b9
JM		 2164const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2165 const u8 *ies, size_t ies_len,
2166 const u8 *fils_session)
2167{
2168 const u8 *ie, *end;
2169 const u8 *session = NULL;
2170
2171 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2172 wpa_printf(MSG_DEBUG,
2173 "FILS: Not a FILS AKM - reject association");
2174 return NULL;
2175 }
2176
2177 /* Verify Session element */
2178 ie = ies;
2179 end = ((const u8 *) ie) + ies_len;
2180 while (ie + 1 < end) {
2181 if (ie + 2 + ie[1] > end)
2182 break;
2183 if (ie[0] == WLAN_EID_EXTENSION &&
2184 ie[1] >= 1 + FILS_SESSION_LEN &&
2185 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2186 session = ie;
2187 break;
2188 }
2189 ie += 2 + ie[1];
2190 }
2191
2192 if (!session) {
2193 wpa_printf(MSG_DEBUG,
2194 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2195 __func__);
2196 return NULL;
2197 }
2198
2199 if (!fils_session) {
2200 wpa_printf(MSG_DEBUG,
2201 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2202 __func__);
2203 return NULL;
2204 }
2205
2206 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2207 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2208 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2209 fils_session, FILS_SESSION_LEN);
2210 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2211 session + 3, FILS_SESSION_LEN);
2212 return NULL;
2213 }
2214 return session;
2215}
2216
2217
78815f3d
JM		 2218int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2219 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2220 u8 *pos, size_t left)
2221{
2222 u16 fc, stype;
2223 const u8 *end, *ie_start, *ie, *session, *crypt;
2224 struct ieee802_11_elems elems;
2225 const u8 *aad[5];
2226 size_t aad_len[5];
2227
2228 if (!sm || !sm->PTK_valid) {
2229 wpa_printf(MSG_DEBUG,
2230 "FILS: No KEK to decrypt Assocication Request frame");
2231 return -1;
2232 }
2233
2234 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2235 wpa_printf(MSG_DEBUG,
2236 "FILS: Not a FILS AKM - reject association");
2237 return -1;
2238 }
2239
2240 end = ((const u8 *) mgmt) + frame_len;
2241 fc = le_to_host16(mgmt->frame_control);
2242 stype = WLAN_FC_GET_STYPE(fc);
2243 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2244 ie_start = mgmt->u.reassoc_req.variable;
2245 else
2246 ie_start = mgmt->u.assoc_req.variable;
2247 ie = ie_start;
2248
2249 /*
2250 * Find FILS Session element which is the last unencrypted element in
2251 * the frame.
2252 */
087631b9
JM		 2253 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2254 fils_session);
78815f3d 2255 if (!session) {
087631b9 2256 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
78815f3d
JM		 2257 return -1;
2258 }
087631b9 2259
78815f3d
JM		 2260 crypt = session + 2 + session[1];
2261
2262 if (end - crypt < AES_BLOCK_SIZE) {
2263 wpa_printf(MSG_DEBUG,
2264 "FILS: Too short frame to include AES-SIV data");
2265 return -1;
2266 }
2267
2268 /* AES-SIV AAD vectors */
2269
2270 /* The STA's MAC address */
2271 aad[0] = mgmt->sa;
2272 aad_len[0] = ETH_ALEN;
2273 /* The AP's BSSID */
2274 aad[1] = mgmt->da;
2275 aad_len[1] = ETH_ALEN;
2276 /* The STA's nonce */
2277 aad[2] = sm->SNonce;
2278 aad_len[2] = FILS_NONCE_LEN;
2279 /* The AP's nonce */
2280 aad[3] = sm->ANonce;
2281 aad_len[3] = FILS_NONCE_LEN;
2282 /*
2283 * The (Re)Association Request frame from the Capability Information
2284 * field to the FILS Session element (both inclusive).
2285 */
2286 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2287 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2288
2289 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2290 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2291 wpa_printf(MSG_DEBUG,
2292 "FILS: Invalid AES-SIV data in the frame");
2293 return -1;
2294 }
2295 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2296 pos, left - AES_BLOCK_SIZE);
2297
2298 if (ieee802_11_parse_elems(pos, left - AES_BLOCK_SIZE, &elems, 1) ==
2299 ParseFailed) {
2300 wpa_printf(MSG_DEBUG,
2301 "FILS: Failed to parse decrypted elements");
2302 return -1;
2303 }
2304 if (!elems.fils_key_confirm) {
2305 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2306 return -1;
2307 }
2308 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2309 wpa_printf(MSG_DEBUG,
2310 "FILS: Unexpected Key-Auth length %d (expected %d)",
2311 elems.fils_key_confirm_len,
2312 (int) sm->fils_key_auth_len);
2313 return -1;
2314 }
2315 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2316 sm->fils_key_auth_len) != 0) {
2317 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2318 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2319 elems.fils_key_confirm,
2320 elems.fils_key_confirm_len);
2321 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2322 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2323 return -1;
2324 }
2325
2326 return left - AES_BLOCK_SIZE;
2327}
2328
e73ffa09
JM		 2329
2330int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2331 size_t current_len, size_t max_len,
2332 const struct wpabuf *hlp)
e73ffa09
JM		 2333{
2334 u8 *end = buf + max_len;
2335 u8 *pos = buf + current_len;
2336 struct ieee80211_mgmt *mgmt;
2337 struct wpabuf *plain;
2338 u8 *len, *tmp, *tmp2;
2339 u8 hdr[2];
2340 u8 *gtk, dummy_gtk[32];
2341 size_t gtk_len;
2342 struct wpa_group *gsm;
2343 const u8 *aad[5];
2344 size_t aad_len[5];
2345
2346 if (!sm || !sm->PTK_valid)
2347 return -1;
2348
2349 wpa_hexdump(MSG_DEBUG,
2350 "FILS: Association Response frame before FILS processing",
2351 buf, current_len);
2352
2353 mgmt = (struct ieee80211_mgmt *) buf;
2354
2355 /* AES-SIV AAD vectors */
2356
2357 /* The AP's BSSID */
2358 aad[0] = mgmt->sa;
2359 aad_len[0] = ETH_ALEN;
2360 /* The STA's MAC address */
2361 aad[1] = mgmt->da;
2362 aad_len[1] = ETH_ALEN;
2363 /* The AP's nonce */
2364 aad[2] = sm->ANonce;
2365 aad_len[2] = FILS_NONCE_LEN;
2366 /* The STA's nonce */
2367 aad[3] = sm->SNonce;
2368 aad_len[3] = FILS_NONCE_LEN;
2369 /*
2370 * The (Re)Association Response frame from the Capability Information
2371 * field (the same offset in both Association and Reassociation
2372 * Response frames) to the FILS Session element (both inclusive).
2373 */
2374 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2375 aad_len[4] = pos - aad[4];
2376
2377 /* The following elements will be encrypted with AES-SIV */
2378
2379 plain = wpabuf_alloc(1000);
2380 if (!plain)
2381 return -1;
2382
2383 /* TODO: FILS Public Key */
2384
2385 /* FILS Key Confirmation */
2386 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2387 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2388 /* Element ID Extension */
2389 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2390 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2391
91d91abf
JM		 2392 /* FILS HLP Container */
2393 if (hlp)
2394 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2395
2396 /* TODO: FILS IP Address Assignment */
2397
2398 /* Key Delivery */
2399 gsm = sm->group;
2400 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2401 len = wpabuf_put(plain, 1);
2402 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2403 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2404 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2405 /* GTK KDE */
2406 gtk = gsm->GTK[gsm->GN - 1];
2407 gtk_len = gsm->GTK_len;
2408 if (sm->wpa_auth->conf.disable_gtk) {
2409 /*
2410 * Provide unique random GTK to each STA to prevent use
2411 * of GTK in the BSS.
2412 */
2413 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2414 wpabuf_free(plain);
2415 return -1;
2416 }
2417 gtk = dummy_gtk;
2418 }
2419 hdr[0] = gsm->GN & 0x03;
2420 hdr[1] = 0;
2421 tmp = wpabuf_put(plain, 0);
2422 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2423 gtk, gtk_len);
2424 wpabuf_put(plain, tmp2 - tmp);
2425
2426 /* IGTK KDE */
2427 tmp = wpabuf_put(plain, 0);
2428 tmp2 = ieee80211w_kde_add(sm, tmp);
2429 wpabuf_put(plain, tmp2 - tmp);
2430
2431 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
2432
2433 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2434 wpa_printf(MSG_DEBUG,
2435 "FILS: Not enough room for FILS elements");
2436 wpabuf_free(plain);
2437 return -1;
2438 }
2439
2440 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2441 plain);
2442
2443 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2444 wpabuf_head(plain), wpabuf_len(plain),
2445 5, aad, aad_len, pos) < 0) {
2446 wpabuf_free(plain);
2447 return -1;
2448 }
2449
2450 wpa_hexdump(MSG_DEBUG,
2451 "FILS: Encrypted Association Response elements",
2452 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2453 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2454 wpabuf_free(plain);
2455
07e0117d
JM		 2456 sm->fils_completed = 1;
2457
e73ffa09
JM		 2458 return current_len;
2459}
2460
da24c5aa
JM		 2461
2462int fils_set_tk(struct wpa_state_machine *sm)
2463{
2464 enum wpa_alg alg;
2465 int klen;
2466
2467 if (!sm || !sm->PTK_valid)
2468 return -1;
2469
2470 alg = wpa_cipher_to_alg(sm->pairwise);
2471 klen = wpa_cipher_key_len(sm->pairwise);
2472
2473 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2474 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2475 sm->PTK.tk, klen)) {
2476 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2477 return -1;
2478 }
2479
2480 return 0;
2481}
2482
3b5b7aa8
JM		 2483#endif /* CONFIG_FILS */
2484
2485
6fc6879b
JM		 2486SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2487{
3b5b7aa8 2488 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2489 struct wpa_ptk PTK;
2c502460 2490 int ok = 0, psk_found = 0;
6fc6879b 2491 const u8 *pmk = NULL;
207976f0 2492 unsigned int pmk_len;
3b5b7aa8
JM		 2493 int ft;
2494 const u8 *eapol_key_ie, *key_data, *mic;
2495 u16 key_data_length;
2496 size_t mic_len, eapol_key_ie_len;
2497 struct ieee802_1x_hdr *hdr;
2498 struct wpa_eapol_key *key;
2499 struct wpa_eapol_ie_parse kde;
6fc6879b
JM		 2500
2501 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2502 sm->EAPOLKeyReceived = FALSE;
68921e24 2503 sm->update_snonce = FALSE;
b729fd8d 2504 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2505
3b5b7aa8
JM		 2506 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
2507
6fc6879b
JM		 2508 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2509 * WPA-PSK: iterate through possible PSKs and select the one matching
2510 * the packet */
2511 for (;;) {
56586197 2512 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
759fd76b
JM		 2513 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2514 sm->p2p_dev_addr, pmk);
6fc6879b
JM		 2515 if (pmk == NULL)
2516 break;
2c502460 2517 psk_found = 1;
207976f0
JM		 2518 pmk_len = PMK_LEN;
2519 } else {
6fc6879b 2520 pmk = sm->PMK;
207976f0
JM		 2521 pmk_len = sm->pmk_len;
2522 }
6fc6879b 2523
364c064a
JM		 2524 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2525 break;
6fc6879b 2526
3b5b7aa8
JM		 2527 if (mic_len &&
2528 wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK,
929a2ea5 2529 sm->last_rx_eapol_key,
6fc6879b
JM		 2530 sm->last_rx_eapol_key_len) == 0) {
2531 ok = 1;
2532 break;
2533 }
2534
3b5b7aa8 2535#ifdef CONFIG_FILS
75c8563e
JM		 2536 if (!mic_len &&
2537 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2538 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2539 ok = 1;
2540 break;
2541 }
2542#endif /* CONFIG_FILS */
2543
56586197 2544 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 2545 break;
2546 }
2547
2548 if (!ok) {
2549 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2550 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2551 if (psk_found)
2552 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2553 return;
2554 }
2555
3b5b7aa8
JM		 2556 /*
2557 * Note: last_rx_eapol_key length fields have already been validated in
2558 * wpa_receive().
2559 */
2560 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2561 key = (struct wpa_eapol_key *) (hdr + 1);
2562 mic = (u8 *) (key + 1);
2563 key_data = mic + mic_len + 2;
2564 key_data_length = WPA_GET_BE16(mic + mic_len);
2565 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2566 sizeof(*key) - mic_len - 2)
2567 return;
2568
2569 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2570 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2571 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2572 return;
2573 }
2574 if (kde.rsn_ie) {
2575 eapol_key_ie = kde.rsn_ie;
2576 eapol_key_ie_len = kde.rsn_ie_len;
2577 } else if (kde.osen) {
2578 eapol_key_ie = kde.osen;
2579 eapol_key_ie_len = kde.osen_len;
2580 } else {
2581 eapol_key_ie = kde.wpa_ie;
2582 eapol_key_ie_len = kde.wpa_ie_len;
2583 }
2584 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2585 if (sm->wpa_ie == NULL ||
2586 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2587 eapol_key_ie, eapol_key_ie_len)) {
2588 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2589 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2590 if (sm->wpa_ie) {
2591 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2592 sm->wpa_ie, sm->wpa_ie_len);
2593 }
2594 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2595 eapol_key_ie, eapol_key_ie_len);
2596 /* MLME-DEAUTHENTICATE.request */
2597 wpa_sta_disconnect(wpa_auth, sm->addr);
2598 return;
2599 }
4ec1fd8e 2600#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8
JM		 2601 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
2602 wpa_sta_disconnect(wpa_auth, sm->addr);
2603 return;
2604 }
4ec1fd8e 2605#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2606#ifdef CONFIG_P2P
2607 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2608 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2609 int idx;
2610 wpa_printf(MSG_DEBUG,
2611 "P2P: IP address requested in EAPOL-Key exchange");
2612 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2613 if (idx >= 0) {
2614 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2615 bitfield_set(wpa_auth->ip_pool, idx);
2616 WPA_PUT_BE32(sm->ip_addr, start + idx);
2617 wpa_printf(MSG_DEBUG,
2618 "P2P: Assigned IP address %u.%u.%u.%u to "
2619 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2620 sm->ip_addr[2], sm->ip_addr[3],
2621 MAC2STR(sm->addr));
2622 }
2623 }
2624#endif /* CONFIG_P2P */
2625
4ec1fd8e 2626#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2627 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2628 /*
2629 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2630 * with the value we derived.
2631 */
870834a1
JM		 2632 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2633 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2634 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2635 "PMKR1Name mismatch in FT 4-way "
2636 "handshake");
2637 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2638 "Supplicant",
2639 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2640 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2641 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2642 return;
2643 }
2644 }
4ec1fd8e 2645#endif /* CONFIG_IEEE80211R_AP */
26e23750 2646
e4bf4db9 2647 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2648 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2649
56586197 2650 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2651 /* PSK may have changed from the previous choice, so update
2652 * state machine data based on whatever PSK was selected here.
2653 */
2654 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2655 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2656 }
2657
2658 sm->MICVerified = TRUE;
2659
2660 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2661 sm->PTK_valid = TRUE;
2662}
2663
2664
2665SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2666{
2667 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2668 sm->TimeoutCtr = 0;
2669}
2670
2671
2672#ifdef CONFIG_IEEE80211W
2673
2674static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2675{
2676 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2677 size_t len;
2678 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2679 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2680 }
2681
2682 return 0;
2683}
2684
2685
2686static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2687{
2688 struct wpa_igtk_kde igtk;
2689 struct wpa_group *gsm = sm->group;
03610ad2 2690 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 2691 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 2692
2693 if (!sm->mgmt_frame_prot)
2694 return pos;
2695
2696 igtk.keyid[0] = gsm->GN_igtk;
2697 igtk.keyid[1] = 0;
7b1080da 2698 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 2699 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 2700 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 2701 else
2702 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 2703 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
83421850
JM		 2704 if (sm->wpa_auth->conf.disable_gtk) {
2705 /*
2706 * Provide unique random IGTK to each STA to prevent use of
2707 * IGTK in the BSS.
2708 */
8dd9f9cd 2709 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 2710 return pos;
2711 }
6fc6879b 2712 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 2713 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2714 NULL, 0);
6fc6879b
JM		 2715
2716 return pos;
2717}
2718
2719#else /* CONFIG_IEEE80211W */
2720
2721static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2722{
2723 return 0;
2724}
2725
2726
2727static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2728{
2729 return pos;
2730}
2731
2732#endif /* CONFIG_IEEE80211W */
2733
2734
2735SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2736{
83421850 2737 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 2738 size_t gtk_len, kde_len;
2739 struct wpa_group *gsm = sm->group;
2740 u8 *wpa_ie;
2741 int wpa_ie_len, secure, keyidx, encr = 0;
2742
2743 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2744 sm->TimeoutEvt = FALSE;
bae61562
JM		 2745
2746 sm->TimeoutCtr++;
41f140d3 2747 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2748 /* No point in sending the EAPOL-Key - we will disconnect
2749 * immediately following this. */
2750 return;
2751 }
2752
86dfabb8
JM		 2753 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2754 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2755 */
2756 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2757 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2758 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2759 wpa_ie = sm->wpa_auth->wpa_ie;
2760 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2761 if (sm->wpa == WPA_VERSION_WPA &&
2762 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2763 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 2764 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 2765 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 2766 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2767 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 2768 wpa_ie_len = wpa_ie[1] + 2;
2769 }
2770 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2771 "sending 3/4 msg of 4-Way Handshake");
2772 if (sm->wpa == WPA_VERSION_WPA2) {
2773 /* WPA2 send GTK in the 4-way handshake */
2774 secure = 1;
2775 gtk = gsm->GTK[gsm->GN - 1];
2776 gtk_len = gsm->GTK_len;
83421850
JM		 2777 if (sm->wpa_auth->conf.disable_gtk) {
2778 /*
2779 * Provide unique random GTK to each STA to prevent use
2780 * of GTK in the BSS.
2781 */
2782 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2783 return;
2784 gtk = dummy_gtk;
2785 }
6fc6879b
JM		 2786 keyidx = gsm->GN;
2787 _rsc = rsc;
2788 encr = 1;
2789 } else {
2790 /* WPA does not include GTK in msg 3/4 */
2791 secure = 0;
2792 gtk = NULL;
2793 gtk_len = 0;
2794 keyidx = 0;
2795 _rsc = NULL;
0d442aff
JM		 2796 if (sm->rx_eapol_key_secure) {
2797 /*
2798 * It looks like Windows 7 supplicant tries to use
2799 * Secure bit in msg 2/4 after having reported Michael
2800 * MIC failure and it then rejects the 4-way handshake
2801 * if msg 3/4 does not set Secure bit. Work around this
2802 * by setting the Secure bit here even in the case of
2803 * WPA if the supplicant used it first.
2804 */
2805 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2806 "STA used Secure bit in WPA msg 2/4 - "
2807 "set Secure for 3/4 as workaround");
0d442aff
JM		 2808 secure = 1;
2809 }
6fc6879b
JM		 2810 }
2811
2812 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2813 if (gtk)
2814 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 2815#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2816 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2817 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2818 kde_len += 300; /* FTIE + 2 * TIE */
2819 }
4ec1fd8e 2820#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 2821#ifdef CONFIG_P2P
2822 if (WPA_GET_BE32(sm->ip_addr) > 0)
2823 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2824#endif /* CONFIG_P2P */
6fc6879b
JM		 2825 kde = os_malloc(kde_len);
2826 if (kde == NULL)
2827 return;
2828
2829 pos = kde;
2830 os_memcpy(pos, wpa_ie, wpa_ie_len);
2831 pos += wpa_ie_len;
4ec1fd8e 2832#ifdef CONFIG_IEEE80211R_AP
26e23750 2833 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 2834 int res;
2835 size_t elen;
2836
2837 elen = pos - kde;
2838 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 2839 if (res < 0) {
2840 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2841 "PMKR1Name into RSN IE in EAPOL-Key data");
2842 os_free(kde);
2843 return;
2844 }
59e78c24
JM		 2845 pos -= wpa_ie_len;
2846 pos += elen;
26e23750 2847 }
4ec1fd8e 2848#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2849 if (gtk) {
2850 u8 hdr[2];
2851 hdr[0] = keyidx & 0x03;
2852 hdr[1] = 0;
2853 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2854 gtk, gtk_len);
2855 }
2856 pos = ieee80211w_kde_add(sm, pos);
2857
4ec1fd8e 2858#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2859 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2860 int res;
2861 struct wpa_auth_config *conf;
2862
2863 conf = &sm->wpa_auth->conf;
9257610a
JM		 2864 if (sm->assoc_resp_ftie &&
2865 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
2866 os_memcpy(pos, sm->assoc_resp_ftie,
2867 2 + sm->assoc_resp_ftie[1]);
2868 res = 2 + sm->assoc_resp_ftie[1];
2869 } else {
2870 res = wpa_write_ftie(conf, conf->r0_key_holder,
2871 conf->r0_key_holder_len,
2872 NULL, NULL, pos,
2873 kde + kde_len - pos,
2874 NULL, 0);
2875 }
86dfabb8
JM		 2876 if (res < 0) {
2877 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2878 "into EAPOL-Key Key Data");
2879 os_free(kde);
2880 return;
2881 }
2882 pos += res;
2883
2884 /* TIE[ReassociationDeadline] (TU) */
2885 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2886 *pos++ = 5;
2887 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2888 WPA_PUT_LE32(pos, conf->reassociation_deadline);
2889 pos += 4;
2890
2891 /* TIE[KeyLifetime] (seconds) */
2892 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2893 *pos++ = 5;
2894 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2895 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2896 pos += 4;
2897 }
4ec1fd8e 2898#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 2899#ifdef CONFIG_P2P
2900 if (WPA_GET_BE32(sm->ip_addr) > 0) {
2901 u8 addr[3 * 4];
2902 os_memcpy(addr, sm->ip_addr, 4);
2903 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2904 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2905 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2906 addr, sizeof(addr), NULL, 0);
2907 }
2908#endif /* CONFIG_P2P */
86dfabb8 2909
6fc6879b 2910 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d
JM		 2911 (secure ? WPA_KEY_INFO_SECURE : 0) |
2912 (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 2913 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2914 WPA_KEY_INFO_KEY_TYPE,
2915 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2916 os_free(kde);
6fc6879b
JM		 2917}
2918
2919
2920SM_STATE(WPA_PTK, PTKINITDONE)
2921{
2922 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2923 sm->EAPOLKeyReceived = FALSE;
2924 if (sm->Pair) {
c3550295
JM		 2925 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2926 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 2927 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 2928 sm->PTK.tk, klen)) {
6fc6879b
JM		 2929 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2930 return;
2931 }
2932 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2933 sm->pairwise_set = TRUE;
2934
581a8cde
JM		 2935 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2936 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2937 eloop_register_timeout(sm->wpa_auth->conf.
2938 wpa_ptk_rekey, 0, wpa_rekey_ptk,
2939 sm->wpa_auth, sm);
2940 }
2941
a1ea1b45
JM		 2942 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
2943 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 2944 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2945 WPA_EAPOL_authorized, 1);
2946 }
2947 }
2948
2949 if (0 /* IBSS == TRUE */) {
2950 sm->keycount++;
2951 if (sm->keycount == 2) {
2952 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2953 WPA_EAPOL_portValid, 1);
2954 }
2955 } else {
2956 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2957 1);
2958 }
2959 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2960 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2961 if (sm->wpa == WPA_VERSION_WPA)
2962 sm->PInitAKeys = TRUE;
2963 else
2964 sm->has_GTK = TRUE;
2965 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2966 "pairwise key handshake completed (%s)",
2967 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2968
4ec1fd8e 2969#ifdef CONFIG_IEEE80211R_AP
6fc6879b 2970 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 2971#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2972}
2973
2974
2975SM_STEP(WPA_PTK)
2976{
2977 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2978
2979 if (sm->Init)
2980 SM_ENTER(WPA_PTK, INITIALIZE);
2981 else if (sm->Disconnect
1aae01fc
BG		 2982 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2983 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2984 "WPA_PTK: sm->Disconnect");
6fc6879b 2985 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 2986 }
6fc6879b
JM		 2987 else if (sm->DeauthenticationRequest)
2988 SM_ENTER(WPA_PTK, DISCONNECTED);
2989 else if (sm->AuthenticationRequest)
2990 SM_ENTER(WPA_PTK, AUTHENTICATION);
2991 else if (sm->ReAuthenticationRequest)
2992 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2993 else if (sm->PTKRequest)
2994 SM_ENTER(WPA_PTK, PTKSTART);
2995 else switch (sm->wpa_ptk_state) {
2996 case WPA_PTK_INITIALIZE:
2997 break;
2998 case WPA_PTK_DISCONNECT:
2999 SM_ENTER(WPA_PTK, DISCONNECTED);
3000 break;
3001 case WPA_PTK_DISCONNECTED:
3002 SM_ENTER(WPA_PTK, INITIALIZE);
3003 break;
3004 case WPA_PTK_AUTHENTICATION:
3005 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3006 break;
3007 case WPA_PTK_AUTHENTICATION2:
56586197 3008 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 3009 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3010 WPA_EAPOL_keyRun) > 0)
3011 SM_ENTER(WPA_PTK, INITPMK);
a1ea1b45
JM		 3012 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3013 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
6fc6879b
JM		 3014 /* FIX: && 802.1X::keyRun */)
3015 SM_ENTER(WPA_PTK, INITPSK);
3016 break;
3017 case WPA_PTK_INITPMK:
3018 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3019 WPA_EAPOL_keyAvailable) > 0)
3020 SM_ENTER(WPA_PTK, PTKSTART);
3021 else {
3022 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 3023 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3024 "INITPMK - keyAvailable = false");
6fc6879b
JM		 3025 SM_ENTER(WPA_PTK, DISCONNECT);
3026 }
3027 break;
3028 case WPA_PTK_INITPSK:
759fd76b
JM		 3029 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
3030 NULL))
6fc6879b
JM		 3031 SM_ENTER(WPA_PTK, PTKSTART);
3032 else {
3033 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3034 "no PSK configured for the STA");
3035 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3036 SM_ENTER(WPA_PTK, DISCONNECT);
3037 }
3038 break;
3039 case WPA_PTK_PTKSTART:
3040 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3041 sm->EAPOLKeyPairwise)
3042 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3043 else if (sm->TimeoutCtr >
41f140d3 3044 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3045 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3046 wpa_auth_vlogger(
3047 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3048 "PTKSTART: Retry limit %u reached",
3049 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3050 SM_ENTER(WPA_PTK, DISCONNECT);
3051 } else if (sm->TimeoutEvt)
3052 SM_ENTER(WPA_PTK, PTKSTART);
3053 break;
3054 case WPA_PTK_PTKCALCNEGOTIATING:
3055 if (sm->MICVerified)
3056 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3057 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3058 sm->EAPOLKeyPairwise)
3059 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3060 else if (sm->TimeoutEvt)
3061 SM_ENTER(WPA_PTK, PTKSTART);
3062 break;
3063 case WPA_PTK_PTKCALCNEGOTIATING2:
3064 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3065 break;
3066 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3067 if (sm->update_snonce)
3068 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3069 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3070 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3071 SM_ENTER(WPA_PTK, PTKINITDONE);
3072 else if (sm->TimeoutCtr >
41f140d3 3073 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3074 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3075 wpa_auth_vlogger(
3076 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3077 "PTKINITNEGOTIATING: Retry limit %u reached",
3078 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3079 SM_ENTER(WPA_PTK, DISCONNECT);
3080 } else if (sm->TimeoutEvt)
3081 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3082 break;
3083 case WPA_PTK_PTKINITDONE:
3084 break;
3085 }
3086}
3087
3088
3089SM_STATE(WPA_PTK_GROUP, IDLE)
3090{
3091 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3092 if (sm->Init) {
3093 /* Init flag is not cleared here, so avoid busy
3094 * loop by claiming nothing changed. */
3095 sm->changed = FALSE;
3096 }
3097 sm->GTimeoutCtr = 0;
3098}
3099
3100
3101SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3102{
3103 u8 rsc[WPA_KEY_RSC_LEN];
3104 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3105 const u8 *kde;
3106 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3107 size_t kde_len;
83421850 3108 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3109
3110 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3111
3112 sm->GTimeoutCtr++;
41f140d3 3113 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3114 /* No point in sending the EAPOL-Key - we will disconnect
3115 * immediately following this. */
3116 return;
3117 }
3118
6fc6879b
JM		 3119 if (sm->wpa == WPA_VERSION_WPA)
3120 sm->PInitAKeys = FALSE;
3121 sm->TimeoutEvt = FALSE;
3122 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3123 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3124 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3125 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3126 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3127 "sending 1/2 msg of Group Key Handshake");
3128
83421850
JM		 3129 gtk = gsm->GTK[gsm->GN - 1];
3130 if (sm->wpa_auth->conf.disable_gtk) {
3131 /*
3132 * Provide unique random GTK to each STA to prevent use
3133 * of GTK in the BSS.
3134 */
3135 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3136 return;
3137 gtk = dummy_gtk;
3138 }
6fc6879b
JM		 3139 if (sm->wpa == WPA_VERSION_WPA2) {
3140 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3141 ieee80211w_kde_len(sm);
e41e4f9e
JM		 3142 kde_buf = os_malloc(kde_len);
3143 if (kde_buf == NULL)
6fc6879b
JM		 3144 return;
3145
e41e4f9e 3146 kde = pos = kde_buf;
6fc6879b
JM		 3147 hdr[0] = gsm->GN & 0x03;
3148 hdr[1] = 0;
3149 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3150 gtk, gsm->GTK_len);
6fc6879b 3151 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 3152 kde_len = pos - kde;
6fc6879b 3153 } else {
83421850 3154 kde = gtk;
e41e4f9e 3155 kde_len = gsm->GTK_len;
6fc6879b
JM		 3156 }
3157
3158 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d
JM		 3159 WPA_KEY_INFO_SECURE |
3160 (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3161 WPA_KEY_INFO_ACK |
3162 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3163 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3164
3165 os_free(kde_buf);
6fc6879b
JM		 3166}
3167
3168
3169SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3170{
3171 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3172 sm->EAPOLKeyReceived = FALSE;
3173 if (sm->GUpdateStationKeys)
3174 sm->group->GKeyDoneStations--;
3175 sm->GUpdateStationKeys = FALSE;
3176 sm->GTimeoutCtr = 0;
3177 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3178 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3179 "group key handshake completed (%s)",
3180 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3181 sm->has_GTK = TRUE;
3182}
3183
3184
3185SM_STATE(WPA_PTK_GROUP, KEYERROR)
3186{
3187 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3188 if (sm->GUpdateStationKeys)
3189 sm->group->GKeyDoneStations--;
3190 sm->GUpdateStationKeys = FALSE;
3191 sm->Disconnect = TRUE;
4bb9b674
GK		 3192 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3193 "group key handshake failed (%s) after %u tries",
3194 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3195 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3196}
3197
3198
3199SM_STEP(WPA_PTK_GROUP)
3200{
9663596f 3201 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3202 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3203 sm->PtkGroupInit = FALSE;
3204 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3205 case WPA_PTK_GROUP_IDLE:
3206 if (sm->GUpdateStationKeys ||
3207 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3208 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3209 break;
3210 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3211 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3212 !sm->EAPOLKeyPairwise && sm->MICVerified)
3213 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3214 else if (sm->GTimeoutCtr >
41f140d3 3215 sm->wpa_auth->conf.wpa_group_update_count)
6fc6879b
JM		 3216 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3217 else if (sm->TimeoutEvt)
3218 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3219 break;
3220 case WPA_PTK_GROUP_KEYERROR:
3221 SM_ENTER(WPA_PTK_GROUP, IDLE);
3222 break;
3223 case WPA_PTK_GROUP_REKEYESTABLISHED:
3224 SM_ENTER(WPA_PTK_GROUP, IDLE);
3225 break;
3226 }
3227}
3228
3229
3230static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3231 struct wpa_group *group)
3232{
3233 int ret = 0;
3234
6fc6879b
JM		 3235 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3236 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3237 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3238 wpa_auth->addr, group->GNonce,
3239 group->GTK[group->GN - 1], group->GTK_len) < 0)
3240 ret = -1;
5cb9d5c3
JM		 3241 wpa_hexdump_key(MSG_DEBUG, "GTK",
3242 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 3243
3244#ifdef CONFIG_IEEE80211W
70f8cc8e 3245 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3246 size_t len;
3247 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3248 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3249 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3250 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3251 wpa_auth->addr, group->GNonce,
8dd9f9cd 3252 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3253 ret = -1;
6fc6879b 3254 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3255 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 3256 }
3257#endif /* CONFIG_IEEE80211W */
3258
3259 return ret;
3260}
3261
3262
3263static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3264 struct wpa_group *group)
3265{
3266 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3267 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3268 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3269 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3270
3271 /* GTK[0..N] = 0 */
3272 os_memset(group->GTK, 0, sizeof(group->GTK));
3273 group->GN = 1;
3274 group->GM = 2;
3275#ifdef CONFIG_IEEE80211W
3276 group->GN_igtk = 4;
3277 group->GM_igtk = 5;
3278#endif /* CONFIG_IEEE80211W */
3279 /* GTK[GN] = CalcGTK() */
3280 wpa_gtk_update(wpa_auth, group);
3281}
3282
3283
3284static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3285{
473b6f22
MB		 3286 if (ctx != NULL && ctx != sm->group)
3287 return 0;
3288
6fc6879b
JM		 3289 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3290 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3291 "Not in PTKINITDONE; skip Group Key update");
3c183894 3292 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3293 return 0;
3294 }
9663596f
JM		 3295 if (sm->GUpdateStationKeys) {
3296 /*
3c183894
JM		 3297 * This should not really happen, so add a debug log entry.
3298 * Since we clear the GKeyDoneStations before the loop, the
3299 * station needs to be counted here anyway.
9663596f
JM		 3300 */
3301 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3302 "GUpdateStationKeys was already set when "
3303 "marking station for GTK rekeying");
9663596f 3304 }
3c183894 3305
ad3872a3 3306 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3307 if (sm->is_wnmsleep)
3308 return 0;
d32d94db 3309
3c183894
JM		 3310 sm->group->GKeyDoneStations++;
3311 sm->GUpdateStationKeys = TRUE;
3312
6fc6879b
JM		 3313 wpa_sm_step(sm);
3314 return 0;
3315}
3316
3317
ad3872a3
JM		 3318#ifdef CONFIG_WNM
3319/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3320void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3321{
629edfef 3322 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3323 return;
3324
3325 wpa_group_update_sta(sm, NULL);
3326}
3327
3328
3329void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3330{
629edfef
JM		 3331 if (sm)
3332 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3333}
3334
3335
3336int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3337{
d32d94db 3338 struct wpa_group *gsm = sm->group;
835822d4 3339 u8 *start = pos;
d32d94db
XC		 3340
3341 /*
835822d4 3342 * GTK subelement:
d32d94db 3343 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3344 * Key[5..32]
d32d94db 3345 */
835822d4
JM		 3346 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3347 *pos++ = 11 + gsm->GTK_len;
d32d94db 3348 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3349 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3350 pos += 2;
3351 *pos++ = gsm->GTK_len;
3352 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3353 return 0;
835822d4
JM		 3354 pos += 8;
3355 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3356 pos += gsm->GTK_len;
d32d94db 3357
835822d4
JM		 3358 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3359 gsm->GN);
3360 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3361 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3362
835822d4 3363 return pos - start;
d32d94db
XC		 3364}
3365
3366
3367#ifdef CONFIG_IEEE80211W
3368int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3369{
d32d94db 3370 struct wpa_group *gsm = sm->group;
835822d4 3371 u8 *start = pos;
8dd9f9cd 3372 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3373
835822d4
JM		 3374 /*
3375 * IGTK subelement:
3376 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3377 */
3378 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3379 *pos++ = 2 + 6 + len;
835822d4
JM		 3380 WPA_PUT_LE16(pos, gsm->GN_igtk);
3381 pos += 2;
3382 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3383 return 0;
835822d4 3384 pos += 6;
d32d94db 3385
8dd9f9cd
JM		 3386 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3387 pos += len;
d32d94db 3388
835822d4
JM		 3389 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3390 gsm->GN_igtk);
3391 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3392 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3393
835822d4 3394 return pos - start;
d32d94db
XC		 3395}
3396#endif /* CONFIG_IEEE80211W */
ad3872a3 3397#endif /* CONFIG_WNM */
d32d94db
XC		 3398
3399
6fc6879b
JM		 3400static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3401 struct wpa_group *group)
3402{
3403 int tmp;
3404
3405 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3406 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3407 group->changed = TRUE;
3408 group->wpa_group_state = WPA_GROUP_SETKEYS;
3409 group->GTKReKey = FALSE;
3410 tmp = group->GM;
3411 group->GM = group->GN;
3412 group->GN = tmp;
3413#ifdef CONFIG_IEEE80211W
3414 tmp = group->GM_igtk;
3415 group->GM_igtk = group->GN_igtk;
3416 group->GN_igtk = tmp;
3417#endif /* CONFIG_IEEE80211W */
3418 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3419 * counting the STAs that are marked with GUpdateStationKeys instead of
3420 * including all STAs that could be in not-yet-completed state. */
3421 wpa_gtk_update(wpa_auth, group);
3422
3c183894
JM		 3423 if (group->GKeyDoneStations) {
3424 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3425 "GKeyDoneStations=%d when starting new GTK rekey",
3426 group->GKeyDoneStations);
3427 group->GKeyDoneStations = 0;
3428 }
473b6f22 3429 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3430 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3431 group->GKeyDoneStations);
3432}
3433
3434
1bdb7ab3
JM		 3435static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3436 struct wpa_group *group)
6fc6879b 3437{
3c7302c2
JM		 3438 int ret = 0;
3439
3c7302c2 3440 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3441 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3442 broadcast_ether_addr, group->GN,
3443 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3444 ret = -1;
6fc6879b
JM		 3445
3446#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3447 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3448 enum wpa_alg alg;
3449 size_t len;
3450
3451 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3452 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3453
3454 if (ret == 0 &&
3455 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3456 broadcast_ether_addr, group->GN_igtk,
3457 group->IGTK[group->GN_igtk - 4], len) < 0)
3458 ret = -1;
3459 }
6fc6879b 3460#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3461
3462 return ret;
6fc6879b
JM		 3463}
3464
3465
7d7f7be2
JM		 3466static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3467{
3468 if (sm->group == ctx) {
3469 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3470 " for discconnection due to fatal failure",
3471 MAC2STR(sm->addr));
3472 sm->Disconnect = TRUE;
3473 }
3474
3475 return 0;
3476}
3477
3478
3479static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3480 struct wpa_group *group)
3481{
3482 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3483 group->changed = TRUE;
3484 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3485 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3486}
3487
3488
1bdb7ab3
JM		 3489static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3490 struct wpa_group *group)
3491{
3492 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3493 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3494 group->changed = TRUE;
3495 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3496
7d7f7be2
JM		 3497 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3498 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3499 return -1;
7d7f7be2 3500 }
1bdb7ab3
JM		 3501
3502 return 0;
3503}
3504
3505
6fc6879b
JM		 3506static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3507 struct wpa_group *group)
3508{
3509 if (group->GInit) {
3510 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3511 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3512 /* Do not allow group operations */
6fc6879b
JM		 3513 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3514 group->GTKAuthenticator) {
3515 wpa_group_setkeysdone(wpa_auth, group);
3516 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3517 group->GTKReKey) {
3518 wpa_group_setkeys(wpa_auth, group);
3519 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3520 if (group->GKeyDoneStations == 0)
3521 wpa_group_setkeysdone(wpa_auth, group);
3522 else if (group->GTKReKey)
3523 wpa_group_setkeys(wpa_auth, group);
3524 }
3525}
3526
3527
e4a6ea1d 3528static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 3529{
3530 if (sm == NULL)
e4a6ea1d 3531 return 0;
6fc6879b
JM		 3532
3533 if (sm->in_step_loop) {
3534 /* This should not happen, but if it does, make sure we do not
3535 * end up freeing the state machine too early by exiting the
3536 * recursive call. */
3537 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 3538 return 0;
6fc6879b
JM		 3539 }
3540
3541 sm->in_step_loop = 1;
3542 do {
3543 if (sm->pending_deinit)
3544 break;
3545
3546 sm->changed = FALSE;
3547 sm->wpa_auth->group->changed = FALSE;
3548
3549 SM_STEP_RUN(WPA_PTK);
3550 if (sm->pending_deinit)
3551 break;
3552 SM_STEP_RUN(WPA_PTK_GROUP);
3553 if (sm->pending_deinit)
3554 break;
3555 wpa_group_sm_step(sm->wpa_auth, sm->group);
3556 } while (sm->changed || sm->wpa_auth->group->changed);
3557 sm->in_step_loop = 0;
3558
3559 if (sm->pending_deinit) {
3560 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3561 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3562 wpa_free_sta_sm(sm);
e4a6ea1d 3563 return 1;
6fc6879b 3564 }
e4a6ea1d 3565 return 0;
6fc6879b
JM		 3566}
3567
3568
3569static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3570{
3571 struct wpa_state_machine *sm = eloop_ctx;
3572 wpa_sm_step(sm);
3573}
3574
3575
3576void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3577{
3578 if (sm == NULL)
3579 return;
3580 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3581}
3582
3583
3584void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3585{
3586 int tmp, i;
3587 struct wpa_group *group;
3588
3589 if (wpa_auth == NULL)
3590 return;
3591
3592 group = wpa_auth->group;
3593
3594 for (i = 0; i < 2; i++) {
3595 tmp = group->GM;
3596 group->GM = group->GN;
3597 group->GN = tmp;
3598#ifdef CONFIG_IEEE80211W
3599 tmp = group->GM_igtk;
3600 group->GM_igtk = group->GN_igtk;
3601 group->GN_igtk = tmp;
3602#endif /* CONFIG_IEEE80211W */
3603 wpa_gtk_update(wpa_auth, group);
9354e594 3604 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 3605 }
3606}
3607
3608
a6da824b 3609static const char * wpa_bool_txt(int val)
6fc6879b 3610{
a6da824b 3611 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 3612}
3613
3614
6fc6879b
JM		 3615#define RSN_SUITE "%02x-%02x-%02x-%d"
3616#define RSN_SUITE_ARG(s) \
3617((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3618
3619int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3620{
3621 int len = 0, ret;
3622 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 3623#ifdef CONFIG_RSN_PREAUTH
3624 const int preauth = 1;
3625#else /* CONFIG_RSN_PREAUTH */
3626 const int preauth = 0;
3627#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 3628
3629 if (wpa_auth == NULL)
3630 return len;
3631
3632 ret = os_snprintf(buf + len, buflen - len,
3633 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 3634 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 3635 "dot11RSNAEnabled=%s\n"
3636 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 3637 wpa_bool_txt(preauth),
6fc6879b
JM		 3638 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3639 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 3640 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3641 return len;
3642 len += ret;
3643
3644 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3645 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3646
3647 ret = os_snprintf(
3648 buf + len, buflen - len,
3649 "dot11RSNAConfigVersion=%u\n"
3650 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3651 /* FIX: dot11RSNAConfigGroupCipher */
3652 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3653 /* FIX: dot11RSNAConfigGroupRekeyTime */
3654 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3655 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3656 "dot11RSNAConfigGroupUpdateCount=%u\n"
3657 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3658 "dot11RSNAConfigGroupCipherSize=%u\n"
3659 "dot11RSNAConfigPMKLifetime=%u\n"
3660 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3661 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3662 "dot11RSNAConfigSATimeout=%u\n"
3663 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3664 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3665 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3666 "dot11RSNAPMKIDUsed=%s\n"
3667 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3668 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3669 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3670 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3671 "dot11RSNA4WayHandshakeFailures=%u\n"
3672 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3673 RSN_VERSION,
3674 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 3675 wpa_auth->conf.wpa_group_update_count,
3676 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 3677 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 3678 dot11RSNAConfigPMKLifetime,
3679 dot11RSNAConfigPMKReauthThreshold,
3680 dot11RSNAConfigSATimeout,
3681 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3682 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3683 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3684 pmkid_txt,
3685 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3686 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3687 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3688 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3689 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 3690 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3691 return len;
3692 len += ret;
3693
3694 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3695 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3696
3697 /* Private MIB */
3698 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3699 wpa_auth->group->wpa_group_state);
d85e1fc8 3700 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3701 return len;
3702 len += ret;
3703
3704 return len;
3705}
3706
3707
3708int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3709{
3710 int len = 0, ret;
3711 u32 pairwise = 0;
3712
3713 if (sm == NULL)
3714 return 0;
3715
3716 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3717
3718 /* dot11RSNAStatsEntry */
3719
c3550295
JM		 3720 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3721 WPA_PROTO_RSN : WPA_PROTO_WPA,
3722 sm->pairwise);
3723 if (pairwise == 0)
6fc6879b
JM		 3724 return 0;
3725
3726 ret = os_snprintf(
3727 buf + len, buflen - len,
3728 /* TODO: dot11RSNAStatsIndex */
3729 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3730 "dot11RSNAStatsVersion=1\n"
3731 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3732 /* TODO: dot11RSNAStatsTKIPICVErrors */
3733 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 3734 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 3735 /* TODO: dot11RSNAStatsCCMPReplays */
3736 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3737 /* TODO: dot11RSNAStatsTKIPReplays */,
3738 MAC2STR(sm->addr),
3739 RSN_SUITE_ARG(pairwise),
3740 sm->dot11RSNAStatsTKIPLocalMICFailures,
3741 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 3742 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3743 return len;
3744 len += ret;
3745
3746 /* Private MIB */
3747 ret = os_snprintf(buf + len, buflen - len,
3748 "hostapdWPAPTKState=%d\n"
3749 "hostapdWPAPTKGroupState=%d\n",
3750 sm->wpa_ptk_state,
3751 sm->wpa_ptk_group_state);
d85e1fc8 3752 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3753 return len;
3754 len += ret;
3755
3756 return len;
3757}
3758
3759
3760void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3761{
3762 if (wpa_auth)
3763 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3764}
3765
3766
3767int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3768{
3769 return sm && sm->pairwise_set;
3770}
3771
3772
ff36ff00
JM		 3773int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3774{
3775 return sm->pairwise;
3776}
3777
3778
6fc6879b
JM		 3779int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3780{
3781 if (sm == NULL)
3782 return -1;
3783 return sm->wpa_key_mgmt;
3784}
3785
3786
3787int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3788{
3789 if (sm == NULL)
3790 return 0;
3791 return sm->wpa;
3792}
3793
3794
3795int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3796 struct rsn_pmksa_cache_entry *entry)
3797{
3798 if (sm == NULL || sm->pmksa != entry)
3799 return -1;
3800 sm->pmksa = NULL;
3801 return 0;
3802}
3803
3804
3805struct rsn_pmksa_cache_entry *
3806wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3807{
3808 return sm ? sm->pmksa : NULL;
3809}
3810
3811
3812void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3813{
3814 if (sm)
3815 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3816}
3817
3818
3819const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3820{
3821 if (wpa_auth == NULL)
3822 return NULL;
3823 *len = wpa_auth->wpa_ie_len;
3824 return wpa_auth->wpa_ie;
3825}
3826
3827
3828int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 3829 unsigned int pmk_len,
6fc6879b
JM		 3830 int session_timeout, struct eapol_state_machine *eapol)
3831{
cb465555
JM		 3832 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3833 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 3834 return -1;
3835
834c5d68 3836 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
207976f0
JM		 3837 if (pmk_len > PMK_LEN_SUITE_B_192)
3838 pmk_len = PMK_LEN_SUITE_B_192;
3839 } else if (pmk_len > PMK_LEN) {
3840 pmk_len = PMK_LEN;
3841 }
3842
70c93963 3843 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 3844 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 3845 sm->wpa_auth->addr, sm->addr, session_timeout,
3846 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 3847 return 0;
3848
3849 return -1;
3850}
3851
3852
3853int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3854 const u8 *pmk, size_t len, const u8 *sta_addr,
3855 int session_timeout,
3856 struct eapol_state_machine *eapol)
3857{
3858 if (wpa_auth == NULL)
3859 return -1;
3860
70c93963 3861 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 3862 NULL, 0,
3863 wpa_auth->addr,
4bb081f1
JM		 3864 sta_addr, session_timeout, eapol,
3865 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 3866 return 0;
3867
3868 return -1;
3869}
3870
3871
f2991170 3872int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 3873 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 3874{
3875 if (wpa_auth->conf.disable_pmksa_caching)
3876 return -1;
3877
70c93963 3878 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 3879 NULL, 0,
f2991170
JM		 3880 wpa_auth->addr, addr, 0, NULL,
3881 WPA_KEY_MGMT_SAE))
3882 return 0;
3883
3884 return -1;
3885}
3886
3887
901d1fe1
JM		 3888void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3889 const u8 *sta_addr)
3890{
3891 struct rsn_pmksa_cache_entry *pmksa;
3892
3893 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3894 return;
3895 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3896 if (pmksa) {
3897 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3898 MACSTR " based on request", MAC2STR(sta_addr));
3899 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3900 }
3901}
3902
3903
b8daac18
MH		 3904int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
3905 size_t len)
3906{
3907 if (!wpa_auth || !wpa_auth->pmksa)
3908 return 0;
3909 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
3910}
3911
3912
4c522c77
MH		 3913void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
3914{
3915 if (wpa_auth && wpa_auth->pmksa)
3916 pmksa_cache_auth_flush(wpa_auth->pmksa);
3917}
3918
3919
4d77d80e
MH		 3920#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
3921#ifdef CONFIG_MESH
3922
3923int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
3924 char *buf, size_t len)
3925{
3926 if (!wpa_auth || !wpa_auth->pmksa)
3927 return 0;
3928
3929 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
3930}
3931
3932
3933struct rsn_pmksa_cache_entry *
3934wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
3935 const u8 *pmkid, int expiration)
3936{
3937 struct rsn_pmksa_cache_entry *entry;
3938 struct os_reltime now;
3939
3940 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
3941 spa, 0, NULL, WPA_KEY_MGMT_SAE);
3942 if (!entry)
3943 return NULL;
3944
3945 os_get_reltime(&now);
3946 entry->expiration = now.sec + expiration;
3947 return entry;
3948}
3949
3950
3951int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
3952 struct rsn_pmksa_cache_entry *entry)
3953{
3954 int ret;
3955
3956 if (!wpa_auth || !wpa_auth->pmksa)
3957 return -1;
3958
3959 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
3960 if (ret < 0)
3961 wpa_printf(MSG_DEBUG,
3962 "RSN: Failed to store external PMKSA cache for "
3963 MACSTR, MAC2STR(entry->spa));
3964
3965 return ret;
3966}
3967
3968#endif /* CONFIG_MESH */
3969#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
3970
3971
9f2cf23e 3972struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 3973wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
3974 const u8 *pmkid)
9f2cf23e
MH		 3975{
3976 if (!wpa_auth || !wpa_auth->pmksa)
3977 return NULL;
c1bd4bac 3978 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 3979}
3980
3981
3982void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
3983 struct wpa_state_machine *sm,
3984 struct wpa_authenticator *wpa_auth,
3985 u8 *pmkid, u8 *pmk)
3986{
3987 if (!sm)
3988 return;
3989
3990 sm->pmksa = pmksa;
8854f90b
JM		 3991 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
3992 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
3993 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 3994}
3995
3996
a0ad9e8c
MB		 3997/*
3998 * Remove and free the group from wpa_authenticator. This is triggered by a
3999 * callback to make sure nobody is currently iterating the group list while it
4000 * gets modified.
4001 */
4002static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4003 struct wpa_group *group)
4004{
4005 struct wpa_group *prev = wpa_auth->group;
4006
4007 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4008 group->vlan_id);
4009
4010 while (prev) {
4011 if (prev->next == group) {
4012 /* This never frees the special first group as needed */
4013 prev->next = group->next;
4014 os_free(group);
4015 break;
4016 }
4017 prev = prev->next;
4018 }
4019
4020}
4021
4022
4023/* Increase the reference counter for group */
4024static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4025 struct wpa_group *group)
4026{
4027 /* Skip the special first group */
4028 if (wpa_auth->group == group)
4029 return;
4030
4031 group->references++;
4032}
4033
4034
4035/* Decrease the reference counter and maybe free the group */
4036static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4037 struct wpa_group *group)
4038{
4039 /* Skip the special first group */
4040 if (wpa_auth->group == group)
4041 return;
4042
4043 group->references--;
4044 if (group->references)
4045 return;
4046 wpa_group_free(wpa_auth, group);
4047}
4048
4049
4050/*
4051 * Add a group that has its references counter set to zero. Caller needs to
4052 * call wpa_group_get() on the return value to mark the entry in use.
4053 */
6fc6879b
JM		 4054static struct wpa_group *
4055wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4056{
4057 struct wpa_group *group;
4058
4059 if (wpa_auth == NULL || wpa_auth->group == NULL)
4060 return NULL;
4061
4062 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4063 vlan_id);
bdffdc5d 4064 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4065 if (group == NULL)
4066 return NULL;
4067
4068 group->next = wpa_auth->group->next;
4069 wpa_auth->group->next = group;
4070
4071 return group;
4072}
4073
4074
7cebc8e2
MB		 4075/*
4076 * Enforce that the group state machine for the VLAN is running, increase
4077 * reference counter as interface is up. References might have been increased
4078 * even if a negative value is returned.
4079 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4080 */
4081int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4082{
4083 struct wpa_group *group;
4084
4085 if (wpa_auth == NULL)
4086 return 0;
4087
4088 group = wpa_auth->group;
4089 while (group) {
4090 if (group->vlan_id == vlan_id)
4091 break;
4092 group = group->next;
4093 }
4094
4095 if (group == NULL) {
4096 group = wpa_auth_add_group(wpa_auth, vlan_id);
4097 if (group == NULL)
4098 return -1;
4099 }
4100
4101 wpa_printf(MSG_DEBUG,
4102 "WPA: Ensure group state machine running for VLAN ID %d",
4103 vlan_id);
4104
4105 wpa_group_get(wpa_auth, group);
4106 group->num_setup_iface++;
4107
4108 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4109 return -1;
4110
4111 return 0;
4112}
4113
4114
4115/*
4116 * Decrease reference counter, expected to be zero afterwards.
4117 * returns: -1 on error (group not found, group in fail state)
4118 * -2 if wpa_group is still referenced
4119 * 0 else
4120 */
4121int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4122{
4123 struct wpa_group *group;
4124 int ret = 0;
4125
4126 if (wpa_auth == NULL)
4127 return 0;
4128
4129 group = wpa_auth->group;
4130 while (group) {
4131 if (group->vlan_id == vlan_id)
4132 break;
4133 group = group->next;
4134 }
4135
4136 if (group == NULL)
4137 return -1;
4138
4139 wpa_printf(MSG_DEBUG,
4140 "WPA: Try stopping group state machine for VLAN ID %d",
4141 vlan_id);
4142
4143 if (group->num_setup_iface <= 0) {
4144 wpa_printf(MSG_ERROR,
4145 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4146 vlan_id);
4147 return -1;
4148 }
4149 group->num_setup_iface--;
4150
4151 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4152 ret = -1;
4153
4154 if (group->references > 1) {
4155 wpa_printf(MSG_DEBUG,
4156 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4157 vlan_id);
4158 ret = -2;
4159 }
4160
4161 wpa_group_put(wpa_auth, group);
4162
4163 return ret;
4164}
4165
4166
6fc6879b
JM		 4167int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4168{
4169 struct wpa_group *group;
4170
4171 if (sm == NULL || sm->wpa_auth == NULL)
4172 return 0;
4173
4174 group = sm->wpa_auth->group;
4175 while (group) {
4176 if (group->vlan_id == vlan_id)
4177 break;
4178 group = group->next;
4179 }
4180
4181 if (group == NULL) {
4182 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4183 if (group == NULL)
4184 return -1;
4185 }
4186
4187 if (sm->group == group)
4188 return 0;
4189
7d7f7be2
JM		 4190 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4191 return -1;
4192
6fc6879b
JM		 4193 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4194 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4195
a0ad9e8c
MB		 4196 wpa_group_get(sm->wpa_auth, group);
4197 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4198 sm->group = group;
a0ad9e8c 4199
6fc6879b
JM		 4200 return 0;
4201}
e4bf4db9
JM		 4202
4203
4204void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4205 struct wpa_state_machine *sm, int ack)
4206{
4207 if (wpa_auth == NULL || sm == NULL)
4208 return;
4209 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4210 " ack=%d", MAC2STR(sm->addr), ack);
4211 if (sm->pending_1_of_4_timeout && ack) {
4212 /*
4213 * Some deployed supplicant implementations update their SNonce
4214 * for each EAPOL-Key 2/4 message even within the same 4-way
4215 * handshake and then fail to use the first SNonce when
4216 * deriving the PTK. This results in unsuccessful 4-way
4217 * handshake whenever the relatively short initial timeout is
4218 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4219 * around this by increasing the timeout now that we know that
4220 * the station has received the frame.
4221 */
4222 int timeout_ms = eapol_key_timeout_subseq;
4223 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4224 "timeout by %u ms because of acknowledged frame",
4225 timeout_ms);
4226 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4227 eloop_register_timeout(timeout_ms / 1000,
4228 (timeout_ms % 1000) * 1000,
4229 wpa_send_eapol_timeout, wpa_auth, sm);
4230 }
4231}
c10347f2
JM		 4232
4233
4234int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4235{
4236 if (sm == NULL)
4237 return 0;
4238 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4239}
aa189ac9
JM		 4240
4241
4242int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4243{
4244 if (sm == NULL)
4245 return 0;
4246 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4247}
25ef8529
JM		 4248
4249
4250#ifdef CONFIG_P2P
4251int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4252{
4253 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4254 return -1;
4255 os_memcpy(addr, sm->ip_addr, 4);
4256 return 0;
4257}
4258#endif /* CONFIG_P2P */
cbc210de
JM		 4259
4260
4261int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4262 struct radius_das_attrs *attr)
4263{
4264 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4265}
34782730
JM		 4266
4267
4268void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4269{
4270 struct wpa_group *group;
4271
4272 if (!wpa_auth)
4273 return;
4274 for (group = wpa_auth->group; group; group = group->next)
4275 wpa_group_config_group_keys(wpa_auth, group);
4276}
7eace378
JM		 4277
4278
4279#ifdef CONFIG_FILS
4280
4281struct wpa_auth_fils_iter_data {
4282 struct wpa_authenticator *auth;
4283 const u8 *cache_id;
4284 struct rsn_pmksa_cache_entry *pmksa;
4285 const u8 *spa;
4286 const u8 *pmkid;
4287};
4288
4289
4290static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4291{
4292 struct wpa_auth_fils_iter_data *data = ctx;
4293
4cc6574d 4294 if (a == data->auth || !a->conf.fils_cache_id_set ||
7eace378
JM		 4295 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4296 FILS_CACHE_ID_LEN) != 0)
4297 return 0;
4298 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4299 return data->pmksa != NULL;
4300}
4301
4302
4303struct rsn_pmksa_cache_entry *
4304wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4305 const u8 *sta_addr, const u8 *pmkid)
4306{
4307 struct wpa_auth_fils_iter_data idata;
4308
4309 if (!wpa_auth->conf.fils_cache_id_set)
4310 return NULL;
4311 idata.auth = wpa_auth;
4312 idata.cache_id = wpa_auth->conf.fils_cache_id;
4313 idata.pmksa = NULL;
4314 idata.spa = sta_addr;
4315 idata.pmkid = pmkid;
4316 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4317 return idata.pmksa;
4318}
4319
5db997e3
JM		 4320
4321#ifdef CONFIG_IEEE80211R_AP
4322int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, u8 *buf, size_t len)
4323{
4324 struct wpa_auth_config *conf = &wpa_auth->conf;
4325
4326 return wpa_write_ftie(conf, conf->r0_key_holder,
4327 conf->r0_key_holder_len,
4328 NULL, NULL, buf, len, NULL, 0);
4329}
4330#endif /* CONFIG_IEEE80211R_AP */
4331
8acbf85f
JM		 4332
4333void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4334 u8 *fils_anonce, u8 *fils_snonce,
4335 u8 *fils_kek, size_t *fils_kek_len)
4336{
4337 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4338 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4339 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4340 *fils_kek_len = sm->PTK.kek_len;
4341}
4342
7eace378 4343#endif /* CONFIG_FILS */
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