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FILS: Fix ifdef for PTK derivation with SHA384-based AKM
[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) &&
6fc6879b
JM		 1021 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1022 wpa_auth_logger(wpa_auth, sm->addr,
1023 LOGGER_WARNING,
1024 "did not use HMAC-SHA1-AES "
eb7719ff 1025 "with CCMP/GCMP");
6fc6879b
JM		 1026 return;
1027 }
1028 }
929a2ea5 1029
2449791b
JM		 1030 if ((wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1031 wpa_key_mgmt_fils(sm->wpa_key_mgmt)) &&
929a2ea5
JM		 1032 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1033 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1034 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1035 return;
1036 }
6fc6879b
JM		 1037 }
1038
1039 if (key_info & WPA_KEY_INFO_REQUEST) {
1040 if (sm->req_replay_counter_used &&
1041 os_memcmp(key->replay_counter, sm->req_replay_counter,
1042 WPA_REPLAY_COUNTER_LEN) <= 0) {
1043 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1044 "received EAPOL-Key request with "
1045 "replayed counter");
1046 return;
1047 }
1048 }
1049
1050 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1051 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1052 int i;
68921e24
JM		 1053
1054 if (msg == PAIRWISE_2 &&
1055 wpa_replay_counter_valid(sm->prev_key_replay,
1056 key->replay_counter) &&
1057 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1058 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1059 {
1060 /*
1061 * Some supplicant implementations (e.g., Windows XP
1062 * WZC) update SNonce for each EAPOL-Key 2/4. This
1063 * breaks the workaround on accepting any of the
1064 * pending requests, so allow the SNonce to be updated
1065 * even if we have already sent out EAPOL-Key 3/4.
1066 */
1067 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1068 "Process SNonce update from STA "
1069 "based on retransmitted EAPOL-Key "
1070 "1/4");
1071 sm->update_snonce = 1;
f23c5b17
JM		 1072 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1073 sm->alt_snonce_valid = TRUE;
1074 os_memcpy(sm->alt_replay_counter,
1075 sm->key_replay[0].counter,
1076 WPA_REPLAY_COUNTER_LEN);
1077 goto continue_processing;
1078 }
1079
1080 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1081 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1082 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1083 WPA_REPLAY_COUNTER_LEN) == 0) {
1084 /*
1085 * Supplicant may still be using the old SNonce since
1086 * there was two EAPOL-Key 2/4 messages and they had
1087 * different SNonce values.
1088 */
1089 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1090 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1091 goto continue_processing;
1092 }
1093
1094 if (msg == PAIRWISE_2 &&
1095 wpa_replay_counter_valid(sm->prev_key_replay,
1096 key->replay_counter) &&
1097 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1098 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1099 "ignore retransmitted EAPOL-Key %s - "
1100 "SNonce did not change", msgtxt);
1101 } else {
1102 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1103 "received EAPOL-Key %s with "
1104 "unexpected replay counter", msgtxt);
1105 }
22a299ee
JM		 1106 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1107 if (!sm->key_replay[i].valid)
1108 break;
1109 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1110 sm->key_replay[i].counter,
1111 WPA_REPLAY_COUNTER_LEN);
1112 }
6fc6879b
JM		 1113 wpa_hexdump(MSG_DEBUG, "received replay counter",
1114 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1115 return;
1116 }
1117
68921e24 1118continue_processing:
3b5b7aa8
JM		 1119#ifdef CONFIG_FILS
1120 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1121 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1122 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1123 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1124 return;
1125 }
1126#endif /* CONFIG_FILS */
1127
6fc6879b
JM		 1128 switch (msg) {
1129 case PAIRWISE_2:
1130 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1131 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1132 (!sm->update_snonce ||
1133 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1134 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1135 "received EAPOL-Key msg 2/4 in "
1136 "invalid state (%d) - dropped",
1137 sm->wpa_ptk_state);
1138 return;
1139 }
bbb921da 1140 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1141 if (sm->group->reject_4way_hs_for_entropy) {
1142 /*
1143 * The system did not have enough entropy to generate
1144 * strong random numbers. Reject the first 4-way
1145 * handshake(s) and collect some entropy based on the
1146 * information from it. Once enough entropy is
1147 * available, the next atempt will trigger GMK/Key
1148 * Counter update and the station will be allowed to
1149 * continue.
1150 */
1151 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1152 "collect more entropy for random number "
1153 "generation");
08704cd8 1154 random_mark_pool_ready();
08704cd8
JM		 1155 wpa_sta_disconnect(wpa_auth, sm->addr);
1156 return;
1157 }
6fc6879b
JM		 1158 break;
1159 case PAIRWISE_4:
1160 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1161 !sm->PTK_valid) {
1162 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1163 "received EAPOL-Key msg 4/4 in "
1164 "invalid state (%d) - dropped",
1165 sm->wpa_ptk_state);
1166 return;
1167 }
1168 break;
1169 case GROUP_2:
1170 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1171 || !sm->PTK_valid) {
1172 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1173 "received EAPOL-Key msg 2/2 in "
1174 "invalid state (%d) - dropped",
1175 sm->wpa_ptk_group_state);
1176 return;
1177 }
1178 break;
1179#ifdef CONFIG_PEERKEY
1180 case SMK_M1:
1181 case SMK_M3:
1182 case SMK_ERROR:
1183 if (!wpa_auth->conf.peerkey) {
1184 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1185 "PeerKey use disabled - ignoring message");
1186 return;
1187 }
1188 if (!sm->PTK_valid) {
1189 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1190 "received EAPOL-Key msg SMK in "
1191 "invalid state - dropped");
1192 return;
1193 }
1194 break;
1195#else /* CONFIG_PEERKEY */
1196 case SMK_M1:
1197 case SMK_M3:
1198 case SMK_ERROR:
1199 return; /* STSL disabled - ignore SMK messages */
1200#endif /* CONFIG_PEERKEY */
1201 case REQUEST:
1202 break;
1203 }
1204
1205 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1206 "received EAPOL-Key frame (%s)", msgtxt);
1207
1208 if (key_info & WPA_KEY_INFO_ACK) {
1209 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1210 "received invalid EAPOL-Key: Key Ack set");
1211 return;
1212 }
1213
b9866483
JM		 1214 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1215 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1216 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1217 "received invalid EAPOL-Key: Key MIC not set");
1218 return;
1219 }
1220
b9866483
JM		 1221#ifdef CONFIG_FILS
1222 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1223 (key_info & WPA_KEY_INFO_MIC)) {
1224 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1225 "received invalid EAPOL-Key: Key MIC set");
1226 return;
1227 }
1228#endif /* CONFIG_FILS */
1229
6fc6879b 1230 sm->MICVerified = FALSE;
68921e24 1231 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8
JM		 1232 if (mic_len &&
1233 wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data,
f23c5b17
JM		 1234 data_len) &&
1235 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1236 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1237 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1238 "received EAPOL-Key with invalid MIC");
1239 return;
1240 }
75c8563e
JM		 1241#ifdef CONFIG_FILS
1242 if (!mic_len &&
1243 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1244 &key_data_length) < 0) {
1245 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1246 "received EAPOL-Key with invalid MIC");
1247 return;
1248 }
1249#endif /* CONFIG_FILS */
6fc6879b
JM		 1250 sm->MICVerified = TRUE;
1251 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1252 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1253 }
1254
1255 if (key_info & WPA_KEY_INFO_REQUEST) {
1256 if (sm->MICVerified) {
1257 sm->req_replay_counter_used = 1;
1258 os_memcpy(sm->req_replay_counter, key->replay_counter,
1259 WPA_REPLAY_COUNTER_LEN);
1260 } else {
1261 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1262 "received EAPOL-Key request with "
1263 "invalid MIC");
1264 return;
1265 }
1266
1267 /*
1268 * TODO: should decrypt key data field if encryption was used;
1269 * even though MAC address KDE is not normally encrypted,
1270 * supplicant is allowed to encrypt it.
1271 */
1272 if (msg == SMK_ERROR) {
1273#ifdef CONFIG_PEERKEY
5e3b5197 1274 wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
6fc6879b
JM		 1275#endif /* CONFIG_PEERKEY */
1276 return;
1277 } else if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1278 if (wpa_receive_error_report(
1279 wpa_auth, sm,
1280 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1281 return; /* STA entry was removed */
6fc6879b
JM		 1282 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1283 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1284 "received EAPOL-Key Request for new "
1285 "4-Way Handshake");
1286 wpa_request_new_ptk(sm);
1287#ifdef CONFIG_PEERKEY
1288 } else if (msg == SMK_M1) {
5e3b5197 1289 wpa_smk_m1(wpa_auth, sm, key, key_data,
5c6787a6 1290 key_data_length);
6fc6879b
JM		 1291#endif /* CONFIG_PEERKEY */
1292 } else if (key_data_length > 0 &&
5e3b5197
JM		 1293 wpa_parse_kde_ies(key_data, key_data_length,
1294 &kde) == 0 &&
6fc6879b
JM		 1295 kde.mac_addr) {
1296 } else {
1297 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1298 "received EAPOL-Key Request for GTK "
1299 "rekeying");
6fc6879b
JM		 1300 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1301 wpa_rekey_gtk(wpa_auth, NULL);
1302 }
1303 } else {
68921e24
JM		 1304 /* Do not allow the same key replay counter to be reused. */
1305 wpa_replay_counter_mark_invalid(sm->key_replay,
1306 key->replay_counter);
1307
1308 if (msg == PAIRWISE_2) {
1309 /*
1310 * Maintain a copy of the pending EAPOL-Key frames in
1311 * case the EAPOL-Key frame was retransmitted. This is
1312 * needed to allow EAPOL-Key msg 2/4 reply to another
1313 * pending msg 1/4 to update the SNonce to work around
1314 * unexpected supplicant behavior.
1315 */
1316 os_memcpy(sm->prev_key_replay, sm->key_replay,
1317 sizeof(sm->key_replay));
1318 } else {
1319 os_memset(sm->prev_key_replay, 0,
1320 sizeof(sm->prev_key_replay));
1321 }
1322
1323 /*
1324 * Make sure old valid counters are not accepted anymore and
1325 * do not get copied again.
1326 */
1327 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1328 }
1329
1330#ifdef CONFIG_PEERKEY
1331 if (msg == SMK_M3) {
5e3b5197 1332 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
6fc6879b
JM		 1333 return;
1334 }
1335#endif /* CONFIG_PEERKEY */
1336
1337 os_free(sm->last_rx_eapol_key);
1338 sm->last_rx_eapol_key = os_malloc(data_len);
1339 if (sm->last_rx_eapol_key == NULL)
1340 return;
1341 os_memcpy(sm->last_rx_eapol_key, data, data_len);
1342 sm->last_rx_eapol_key_len = data_len;
1343
0d442aff 1344 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1345 sm->EAPOLKeyReceived = TRUE;
1346 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1347 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1348 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1349 wpa_sm_step(sm);
1350}
1351
1352
3c7302c2
JM		 1353static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1354 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1355{
5cb9d5c3
JM		 1356 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1357 u8 *pos;
3c7302c2 1358 int ret = 0;
6fc6879b 1359
5cb9d5c3
JM		 1360 /* GTK = PRF-X(GMK, "Group key expansion",
1361 * AA || GNonce || Time || random data)
1362 * The example described in the IEEE 802.11 standard uses only AA and
1363 * GNonce as inputs here. Add some more entropy since this derivation
1364 * is done only at the Authenticator and as such, does not need to be
1365 * exactly same.
1366 */
6fc6879b
JM		 1367 os_memcpy(data, addr, ETH_ALEN);
1368 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1369 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1370 wpa_get_ntp_timestamp(pos);
1371 pos += 8;
3642c431 1372 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1373 ret = -1;
6fc6879b 1374
56586197 1375#ifdef CONFIG_IEEE80211W
5cb9d5c3 1376 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1377#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1378 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1379 < 0)
1380 ret = -1;
56586197 1381#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1382
1383 return ret;
6fc6879b
JM		 1384}
1385
1386
1387static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1388{
1389 struct wpa_authenticator *wpa_auth = eloop_ctx;
1390 struct wpa_state_machine *sm = timeout_ctx;
1391
e4bf4db9 1392 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1393 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1394 sm->TimeoutEvt = TRUE;
1395 wpa_sm_step(sm);
1396}
1397
1398
1399void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1400 struct wpa_state_machine *sm, int key_info,
1401 const u8 *key_rsc, const u8 *nonce,
1402 const u8 *kde, size_t kde_len,
1403 int keyidx, int encr, int force_version)
1404{
1405 struct ieee802_1x_hdr *hdr;
1406 struct wpa_eapol_key *key;
5e3b5197 1407 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1408 int alg;
1409 int key_data_len, pad_len = 0;
1410 u8 *buf, *pos;
1411 int version, pairwise;
22a299ee 1412 int i;
6d014ffc 1413 u8 *key_mic, *key_data;
6fc6879b 1414
5e3b5197 1415 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
6d014ffc 1416 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1417
1418 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1419
1420 if (force_version)
1421 version = force_version;
929a2ea5 1422 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
36a50fd4
JM		 1423 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1424 wpa_key_mgmt_fils(sm->wpa_key_mgmt))
a14896e8 1425 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
6fc6879b
JM		 1426 else if (wpa_use_aes_cmac(sm))
1427 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1428 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1429 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1430 else
1431 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1432
8543ed8a 1433 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1434
1435 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1436 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1437 "encr=%d)",
1438 version,
1439 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1440 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1441 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1442 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1443 pairwise, (unsigned long) kde_len, keyidx, encr);
1444
1445 key_data_len = kde_len;
1446
1447 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1448 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1449 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1450 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1451 pad_len = key_data_len % 8;
1452 if (pad_len)
1453 pad_len = 8 - pad_len;
1454 key_data_len += pad_len + 8;
1455 }
1456
1457 len += key_data_len;
b729fd8d
JM		 1458 if (!mic_len && encr)
1459 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1460
1461 hdr = os_zalloc(len);
1462 if (hdr == NULL)
1463 return;
1464 hdr->version = wpa_auth->conf.eapol_version;
1465 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1466 hdr->length = host_to_be16(len - sizeof(*hdr));
1467 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1468 key_mic = (u8 *) (key + 1);
5e3b5197 1469 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1470
1471 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1472 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1473 key_info |= version;
1474 if (encr && sm->wpa == WPA_VERSION_WPA2)
1475 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1476 if (sm->wpa != WPA_VERSION_WPA2)
1477 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1478 WPA_PUT_BE16(key->key_info, key_info);
1479
1480 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
caab23f1
JM		 1481 if ((key_info & WPA_KEY_INFO_SMK_MESSAGE) ||
1482 (sm->wpa == WPA_VERSION_WPA2 && !pairwise))
6fc6879b 1483 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1484 else
1485 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b
JM		 1486
1487 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1488 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1489 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1490 os_memcpy(sm->key_replay[i].counter,
1491 sm->key_replay[i - 1].counter,
1492 WPA_REPLAY_COUNTER_LEN);
1493 }
1494 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1495 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1496 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1497 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1498 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1499 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1500
1501 if (nonce)
1502 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1503
1504 if (key_rsc)
1505 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1506
1507 if (kde && !encr) {
5e3b5197 1508 os_memcpy(key_data, kde, kde_len);
6d014ffc 1509 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d
JM		 1510#ifdef CONFIG_FILS
1511 } else if (!mic_len) {
1512 const u8 *aad[1];
1513 size_t aad_len[1];
1514
1515 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1516 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1517 kde, kde_len);
1518
1519 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1520 sm->PTK.kek, sm->PTK.kek_len);
1521 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1522 * to Key Data (exclusive). */
1523 aad[0] = (u8 *) hdr;
1524 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1525 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1526 1, aad, aad_len, key_mic + 2) < 0) {
1527 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1528 return;
1529 }
1530
1531 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1532 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1533#endif /* CONFIG_FILS */
6fc6879b
JM		 1534 } else if (encr && kde) {
1535 buf = os_zalloc(key_data_len);
1536 if (buf == NULL) {
1537 os_free(hdr);
1538 return;
1539 }
1540 pos = buf;
1541 os_memcpy(pos, kde, kde_len);
1542 pos += kde_len;
1543
1544 if (pad_len)
1545 *pos++ = 0xdd;
1546
1547 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1548 buf, key_data_len);
1549 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
a14896e8 1550 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1551 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b 1552 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
98cd3d1c 1553 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1554 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1555 os_free(hdr);
1556 os_free(buf);
1557 return;
1558 }
6d014ffc 1559 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1560#ifndef CONFIG_NO_RC4
98cd3d1c 1561 } else if (sm->PTK.kek_len == 16) {
6fc6879b
JM		 1562 u8 ek[32];
1563 os_memcpy(key->key_iv,
1564 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1565 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1566 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1567 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1568 os_memcpy(key_data, buf, key_data_len);
1569 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1570 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1571#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1572 } else {
1573 os_free(hdr);
1574 os_free(buf);
1575 return;
6fc6879b
JM		 1576 }
1577 os_free(buf);
1578 }
1579
1580 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1581 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1582 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1583 "PTK not valid when sending EAPOL-Key "
1584 "frame");
1585 os_free(hdr);
1586 return;
1587 }
5e3b5197 1588
98cd3d1c
JM		 1589 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1590 sm->wpa_key_mgmt, version,
5e3b5197 1591 (u8 *) hdr, len, key_mic);
7af092a0
JB		 1592#ifdef CONFIG_TESTING_OPTIONS
1593 if (!pairwise &&
06df2aa6 1594 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1595 drand48() <
1596 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1597 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1598 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1599 key_mic[0]++;
7af092a0
JB		 1600 }
1601#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1602 }
1603
1604 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1605 1);
1606 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1607 sm->pairwise_set);
1608 os_free(hdr);
1609}
1610
1611
1612static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1613 struct wpa_state_machine *sm, int key_info,
1614 const u8 *key_rsc, const u8 *nonce,
1615 const u8 *kde, size_t kde_len,
1616 int keyidx, int encr)
1617{
1618 int timeout_ms;
1619 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1620 u32 ctr;
6fc6879b
JM		 1621
1622 if (sm == NULL)
1623 return;
1624
1625 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1626 keyidx, encr, 0);
1627
bae61562 1628 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1629 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1630 timeout_ms = pairwise ? eapol_key_timeout_first :
1631 eapol_key_timeout_first_group;
bae61562
JM		 1632 else
1633 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1634 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1635 sm->pending_1_of_4_timeout = 1;
1636 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1637 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1638 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1639 wpa_send_eapol_timeout, wpa_auth, sm);
1640}
1641
1642
929a2ea5
JM		 1643static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
1644 size_t data_len)
6fc6879b
JM		 1645{
1646 struct ieee802_1x_hdr *hdr;
1647 struct wpa_eapol_key *key;
1648 u16 key_info;
1649 int ret = 0;
6d014ffc 1650 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
5e3b5197 1651 size_t mic_len = wpa_mic_len(akmp);
6fc6879b
JM		 1652
1653 if (data_len < sizeof(*hdr) + sizeof(*key))
1654 return -1;
1655
1656 hdr = (struct ieee802_1x_hdr *) data;
1657 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1658 mic_pos = (u8 *) (key + 1);
6fc6879b 1659 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1660 os_memcpy(mic, mic_pos, mic_len);
1661 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1662 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1663 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1664 data, data_len, mic_pos) ||
1665 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1666 ret = -1;
6d014ffc 1667 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1668 return ret;
1669}
1670
1671
1672void wpa_remove_ptk(struct wpa_state_machine *sm)
1673{
1674 sm->PTK_valid = FALSE;
1675 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1676 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1677 0))
1678 wpa_printf(MSG_DEBUG,
1679 "RSN: PTK removal from the driver failed");
6fc6879b 1680 sm->pairwise_set = FALSE;
581a8cde 1681 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1682}
1683
1684
bb119228 1685int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1686{
5d22a1d5
JM		 1687 int remove_ptk = 1;
1688
6fc6879b 1689 if (sm == NULL)
6f9b5d16 1690 return -1;
6fc6879b
JM		 1691
1692 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1693 "event %d notification", event);
1694
1695 switch (event) {
1696 case WPA_AUTH:
c50d94f1
BC		 1697#ifdef CONFIG_MESH
1698 /* PTKs are derived through AMPE */
1699 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1700 /* not mesh */
1701 break;
1702 }
1703 return 0;
1704#endif /* CONFIG_MESH */
6fc6879b
JM		 1705 case WPA_ASSOC:
1706 break;
1707 case WPA_DEAUTH:
1708 case WPA_DISASSOC:
1709 sm->DeauthenticationRequest = TRUE;
1710 break;
1711 case WPA_REAUTH:
1712 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1713 if (!sm->started) {
1714 /*
1715 * When using WPS, we may end up here if the STA
1716 * manages to re-associate without the previous STA
1717 * entry getting removed. Consequently, we need to make
1718 * sure that the WPA state machines gets initialized
1719 * properly at this point.
1720 */
1721 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1722 "started - initialize now");
1723 sm->started = 1;
1724 sm->Init = TRUE;
1725 if (wpa_sm_step(sm) == 1)
1726 return 1; /* should not really happen */
1727 sm->Init = FALSE;
1728 sm->AuthenticationRequest = TRUE;
1729 break;
1730 }
9663596f
JM		 1731 if (sm->GUpdateStationKeys) {
1732 /*
1733 * Reauthentication cancels the pending group key
1734 * update for this STA.
1735 */
1736 sm->group->GKeyDoneStations--;
1737 sm->GUpdateStationKeys = FALSE;
1738 sm->PtkGroupInit = TRUE;
1739 }
6fc6879b
JM		 1740 sm->ReAuthenticationRequest = TRUE;
1741 break;
1742 case WPA_ASSOC_FT:
4ec1fd8e 1743#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1744 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1745 "after association");
1746 wpa_ft_install_ptk(sm);
1747
6fc6879b
JM		 1748 /* Using FT protocol, not WPA auth state machine */
1749 sm->ft_completed = 1;
6f9b5d16 1750 return 0;
4ec1fd8e 1751#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1752 break;
4ec1fd8e 1753#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1754 }
1755
4ec1fd8e 1756#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1757 sm->ft_completed = 0;
4ec1fd8e 1758#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1759
5d22a1d5
JM		 1760#ifdef CONFIG_IEEE80211W
1761 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1762 remove_ptk = 0;
1763#endif /* CONFIG_IEEE80211W */
78815f3d 1764#ifdef CONFIG_FILS
da24c5aa
JM		 1765 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1766 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1767 remove_ptk = 0;
1768#endif /* CONFIG_FILS */
6fc6879b 1769
5d22a1d5
JM		 1770 if (remove_ptk) {
1771 sm->PTK_valid = FALSE;
1772 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1773
1774 if (event != WPA_REAUTH_EAPOL)
1775 wpa_remove_ptk(sm);
1776 }
6fc6879b 1777
43f49c37
JM		 1778 if (sm->in_step_loop) {
1779 /*
1780 * wpa_sm_step() is already running - avoid recursive call to
1781 * it by making the existing loop process the new update.
1782 */
1783 sm->changed = TRUE;
1784 return 0;
1785 }
6f9b5d16 1786 return wpa_sm_step(sm);
6fc6879b
JM		 1787}
1788
1789
6fc6879b
JM		 1790SM_STATE(WPA_PTK, INITIALIZE)
1791{
1792 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1793 if (sm->Init) {
1794 /* Init flag is not cleared here, so avoid busy
1795 * loop by claiming nothing changed. */
1796 sm->changed = FALSE;
1797 }
1798
1799 sm->keycount = 0;
1800 if (sm->GUpdateStationKeys)
1801 sm->group->GKeyDoneStations--;
1802 sm->GUpdateStationKeys = FALSE;
1803 if (sm->wpa == WPA_VERSION_WPA)
1804 sm->PInitAKeys = FALSE;
1805 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1806 * Local AA > Remote AA)) */) {
1807 sm->Pair = TRUE;
1808 }
1809 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1810 wpa_remove_ptk(sm);
1811 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1812 sm->TimeoutCtr = 0;
56586197 1813 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 1814 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1815 WPA_EAPOL_authorized, 0);
1816 }
1817}
1818
1819
1820SM_STATE(WPA_PTK, DISCONNECT)
1821{
1822 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1823 sm->Disconnect = FALSE;
1824 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1825}
1826
1827
1828SM_STATE(WPA_PTK, DISCONNECTED)
1829{
1830 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1831 sm->DeauthenticationRequest = FALSE;
1832}
1833
1834
1835SM_STATE(WPA_PTK, AUTHENTICATION)
1836{
1837 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1838 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1839 sm->PTK_valid = FALSE;
1840 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1841 1);
1842 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1843 sm->AuthenticationRequest = FALSE;
1844}
1845
1846
40d00d2b
NC		 1847static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1848 struct wpa_group *group)
1bdb7ab3 1849{
40d00d2b
NC		 1850 if (group->first_sta_seen)
1851 return;
1bdb7ab3
JM		 1852 /*
1853 * System has run bit further than at the time hostapd was started
1854 * potentially very early during boot up. This provides better chances
1855 * of collecting more randomness on embedded systems. Re-initialize the
1856 * GMK and Counter here to improve their strength if there was not
1857 * enough entropy available immediately after system startup.
1858 */
1859 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1860 "station");
08704cd8
JM		 1861 if (random_pool_ready() != 1) {
1862 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1863 "to proceed - reject first 4-way handshake");
1864 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1865 } else {
1866 group->first_sta_seen = TRUE;
1867 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1868 }
40d00d2b 1869
aac1efec
JM		 1870 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1871 wpa_gtk_update(wpa_auth, group) < 0 ||
1872 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1873 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1874 group->first_sta_seen = FALSE;
1875 group->reject_4way_hs_for_entropy = TRUE;
1876 }
1bdb7ab3
JM		 1877}
1878
1879
6fc6879b
JM		 1880SM_STATE(WPA_PTK, AUTHENTICATION2)
1881{
1882 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1883
40d00d2b 1884 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1885 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1886
3825a19b
JM		 1887 /*
1888 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1889 * ambiguous. The Authenticator state machine uses a counter that is
1890 * incremented by one for each 4-way handshake. However, the security
1891 * analysis of 4-way handshake points out that unpredictable nonces
1892 * help in preventing precomputation attacks. Instead of the state
1893 * machine definition, use an unpredictable nonce value here to provide
1894 * stronger protection against potential precomputation attacks.
1895 */
1896 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1897 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1898 "ANonce.");
65a32cdb 1899 sm->Disconnect = TRUE;
3825a19b
JM		 1900 return;
1901 }
bc8318ac
JM		 1902 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1903 WPA_NONCE_LEN);
6fc6879b
JM		 1904 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1905 * logical place than INITIALIZE since AUTHENTICATION2 can be
1906 * re-entered on ReAuthenticationRequest without going through
1907 * INITIALIZE. */
1908 sm->TimeoutCtr = 0;
1909}
1910
1911
1912SM_STATE(WPA_PTK, INITPMK)
1913{
1914 u8 msk[2 * PMK_LEN];
1915 size_t len = 2 * PMK_LEN;
1916
1917 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1918#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1919 sm->xxkey_len = 0;
4ec1fd8e 1920#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1921 if (sm->pmksa) {
1922 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1923 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1924 sm->pmk_len = sm->pmksa->pmk_len;
6fc6879b 1925 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1926 unsigned int pmk_len;
1927
1928 if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
1929 pmk_len = PMK_LEN_SUITE_B_192;
1930 else
1931 pmk_len = PMK_LEN;
6fc6879b 1932 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1933 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1934 pmk_len);
1935 if (len < pmk_len) {
1936 wpa_printf(MSG_DEBUG,
1937 "WPA: MSK not long enough (%u) to create PMK (%u)",
1938 (unsigned int) len, (unsigned int) pmk_len);
1939 sm->Disconnect = TRUE;
1940 return;
1941 }
1942 os_memcpy(sm->PMK, msk, pmk_len);
1943 sm->pmk_len = pmk_len;
4ec1fd8e 1944#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 1945 if (len >= 2 * PMK_LEN) {
1946 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1947 sm->xxkey_len = PMK_LEN;
1948 }
4ec1fd8e 1949#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1950 } else {
400de9b1 1951 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 1952 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 1953 sm->Disconnect = TRUE;
1954 return;
6fc6879b 1955 }
40aaa64f 1956 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 1957
1958 sm->req_replay_counter_used = 0;
1959 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1960 * will break reauthentication since EAPOL state machines may not be
1961 * get into AUTHENTICATING state that clears keyRun before WPA state
1962 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1963 * state and takes PMK from the previously used AAA Key. This will
1964 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1965 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1966 * be good workaround for this issue. */
1967 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1968}
1969
1970
1971SM_STATE(WPA_PTK, INITPSK)
1972{
1973 const u8 *psk;
1974 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
759fd76b 1975 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
6fc6879b
JM		 1976 if (psk) {
1977 os_memcpy(sm->PMK, psk, PMK_LEN);
207976f0 1978 sm->pmk_len = PMK_LEN;
4ec1fd8e 1979#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 1980 os_memcpy(sm->xxkey, psk, PMK_LEN);
1981 sm->xxkey_len = PMK_LEN;
4ec1fd8e 1982#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1983 }
1984 sm->req_replay_counter_used = 0;
1985}
1986
1987
1988SM_STATE(WPA_PTK, PTKSTART)
1989{
1990 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1991 size_t pmkid_len = 0;
1992
1993 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1994 sm->PTKRequest = FALSE;
1995 sm->TimeoutEvt = FALSE;
f23c5b17 1996 sm->alt_snonce_valid = FALSE;
bae61562
JM		 1997
1998 sm->TimeoutCtr++;
41f140d3 1999 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2000 /* No point in sending the EAPOL-Key - we will disconnect
2001 * immediately following this. */
2002 return;
2003 }
2004
6fc6879b
JM		 2005 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2006 "sending 1/4 msg of 4-Way Handshake");
2007 /*
2008 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
2009 * one possible PSK for this STA.
2010 */
2011 if (sm->wpa == WPA_VERSION_WPA2 &&
a14896e8
JM		 2012 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
2013 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2014 pmkid = buf;
2015 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2016 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2017 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2018 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2019 if (sm->pmksa) {
6fc6879b
JM		 2020 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2021 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2022 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2023 /* No KCK available to derive PMKID */
2024 pmkid = NULL;
2025 } else {
6fc6879b
JM		 2026 /*
2027 * Calculate PMKID since no PMKSA cache entry was
2028 * available with pre-calculated PMKID.
2029 */
207976f0 2030 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197
JM		 2031 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
2032 wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
6fc6879b
JM		 2033 }
2034 }
2035 wpa_send_eapol(sm->wpa_auth, sm,
2036 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2037 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2038}
2039
2040
f23c5b17 2041static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2042 const u8 *pmk, unsigned int pmk_len,
2043 struct wpa_ptk *ptk)
6fc6879b 2044{
4ec1fd8e 2045#ifdef CONFIG_IEEE80211R_AP
56586197 2046 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
98cd3d1c 2047 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
4ec1fd8e 2048#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2049
207976f0 2050 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c
JM		 2051 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2052 ptk, sm->wpa_key_mgmt, sm->pairwise);
6fc6879b
JM		 2053}
2054
2055
3b5b7aa8 2056#ifdef CONFIG_FILS
c4fd6d8a
JM		 2057
2058int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
2059 size_t pmk_len, const u8 *snonce, const u8 *anonce)
2060{
2061 u8 ick[FILS_ICK_MAX_LEN];
2062 size_t ick_len;
2063 int res;
2064
2065 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
2066 snonce, anonce, &sm->PTK, ick, &ick_len,
2067 sm->wpa_key_mgmt, sm->pairwise);
2068 if (res < 0)
2069 return res;
2070 sm->PTK_valid = TRUE;
2071
2072 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2073 sm->addr, sm->wpa_auth->addr,
2074 NULL, 0, NULL, 0, /* TODO: SK+PFS */
2075 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2076 sm->fils_key_auth_ap,
2077 &sm->fils_key_auth_len);
2078 os_memset(ick, 0, sizeof(ick));
78815f3d
JM		 2079
2080 /* Store nonces for (Re)Association Request/Response frame processing */
2081 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2082 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2083
c4fd6d8a
JM		 2084 return res;
2085}
2086
2087
3b5b7aa8 2088static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2089 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2090{
2091 struct ieee802_1x_hdr *hdr;
2092 struct wpa_eapol_key *key;
2093 u8 *pos;
2094 u16 key_data_len;
2095 u8 *tmp;
2096 const u8 *aad[1];
2097 size_t aad_len[1];
2098
75c8563e 2099 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2100 key = (struct wpa_eapol_key *) (hdr + 1);
2101 pos = (u8 *) (key + 1);
2102 key_data_len = WPA_GET_BE16(pos);
2103 if (key_data_len < AES_BLOCK_SIZE ||
2104 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2105 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2106 "No room for AES-SIV data in the frame");
2107 return -1;
2108 }
2109 pos += 2; /* Pointing at the Encrypted Key Data field */
2110
2111 tmp = os_malloc(key_data_len);
2112 if (!tmp)
2113 return -1;
2114
2115 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2116 * to Key Data (exclusive). */
75c8563e
JM		 2117 aad[0] = buf;
2118 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2119 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2120 1, aad, aad_len, tmp) < 0) {
2121 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2122 "Invalid AES-SIV data in the frame");
2123 bin_clear_free(tmp, key_data_len);
2124 return -1;
2125 }
2126
2127 /* AEAD decryption and validation completed successfully */
2128 key_data_len -= AES_BLOCK_SIZE;
2129 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2130 tmp, key_data_len);
2131
2132 /* Replace Key Data field with the decrypted version */
2133 os_memcpy(pos, tmp, key_data_len);
2134 pos -= 2; /* Key Data Length field */
2135 WPA_PUT_BE16(pos, key_data_len);
2136 bin_clear_free(tmp, key_data_len);
2137 if (_key_data_len)
2138 *_key_data_len = key_data_len;
2139 return 0;
2140}
78815f3d
JM		 2141
2142
2143int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2144 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2145 u8 *pos, size_t left)
2146{
2147 u16 fc, stype;
2148 const u8 *end, *ie_start, *ie, *session, *crypt;
2149 struct ieee802_11_elems elems;
2150 const u8 *aad[5];
2151 size_t aad_len[5];
2152
2153 if (!sm || !sm->PTK_valid) {
2154 wpa_printf(MSG_DEBUG,
2155 "FILS: No KEK to decrypt Assocication Request frame");
2156 return -1;
2157 }
2158
2159 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2160 wpa_printf(MSG_DEBUG,
2161 "FILS: Not a FILS AKM - reject association");
2162 return -1;
2163 }
2164
2165 end = ((const u8 *) mgmt) + frame_len;
2166 fc = le_to_host16(mgmt->frame_control);
2167 stype = WLAN_FC_GET_STYPE(fc);
2168 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2169 ie_start = mgmt->u.reassoc_req.variable;
2170 else
2171 ie_start = mgmt->u.assoc_req.variable;
2172 ie = ie_start;
2173
2174 /*
2175 * Find FILS Session element which is the last unencrypted element in
2176 * the frame.
2177 */
2178 session = NULL;
2179 while (ie + 1 < end) {
2180 if (ie + 2 + ie[1] > end)
2181 break;
2182 if (ie[0] == WLAN_EID_EXTENSION &&
2183 ie[1] >= 1 + FILS_SESSION_LEN &&
2184 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2185 session = ie;
2186 break;
2187 }
2188 ie += 2 + ie[1];
2189 }
2190
2191 if (!session) {
2192 wpa_printf(MSG_DEBUG,
2193 "FILS: Could not find FILS Session element in Association Request frame - reject");
2194 return -1;
2195 }
2196 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2197 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2198 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2199 fils_session, FILS_SESSION_LEN);
2200 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2201 session + 3, FILS_SESSION_LEN);
2202 return -1;
2203 }
2204 crypt = session + 2 + session[1];
2205
2206 if (end - crypt < AES_BLOCK_SIZE) {
2207 wpa_printf(MSG_DEBUG,
2208 "FILS: Too short frame to include AES-SIV data");
2209 return -1;
2210 }
2211
2212 /* AES-SIV AAD vectors */
2213
2214 /* The STA's MAC address */
2215 aad[0] = mgmt->sa;
2216 aad_len[0] = ETH_ALEN;
2217 /* The AP's BSSID */
2218 aad[1] = mgmt->da;
2219 aad_len[1] = ETH_ALEN;
2220 /* The STA's nonce */
2221 aad[2] = sm->SNonce;
2222 aad_len[2] = FILS_NONCE_LEN;
2223 /* The AP's nonce */
2224 aad[3] = sm->ANonce;
2225 aad_len[3] = FILS_NONCE_LEN;
2226 /*
2227 * The (Re)Association Request frame from the Capability Information
2228 * field to the FILS Session element (both inclusive).
2229 */
2230 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2231 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2232
2233 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2234 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2235 wpa_printf(MSG_DEBUG,
2236 "FILS: Invalid AES-SIV data in the frame");
2237 return -1;
2238 }
2239 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2240 pos, left - AES_BLOCK_SIZE);
2241
2242 if (ieee802_11_parse_elems(pos, left - AES_BLOCK_SIZE, &elems, 1) ==
2243 ParseFailed) {
2244 wpa_printf(MSG_DEBUG,
2245 "FILS: Failed to parse decrypted elements");
2246 return -1;
2247 }
2248 if (!elems.fils_key_confirm) {
2249 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2250 return -1;
2251 }
2252 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2253 wpa_printf(MSG_DEBUG,
2254 "FILS: Unexpected Key-Auth length %d (expected %d)",
2255 elems.fils_key_confirm_len,
2256 (int) sm->fils_key_auth_len);
2257 return -1;
2258 }
2259 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2260 sm->fils_key_auth_len) != 0) {
2261 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2262 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2263 elems.fils_key_confirm,
2264 elems.fils_key_confirm_len);
2265 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2266 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2267 return -1;
2268 }
2269
2270 return left - AES_BLOCK_SIZE;
2271}
2272
e73ffa09
JM		 2273
2274int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2275 size_t current_len, size_t max_len,
2276 const struct wpabuf *hlp)
e73ffa09
JM		 2277{
2278 u8 *end = buf + max_len;
2279 u8 *pos = buf + current_len;
2280 struct ieee80211_mgmt *mgmt;
2281 struct wpabuf *plain;
2282 u8 *len, *tmp, *tmp2;
2283 u8 hdr[2];
2284 u8 *gtk, dummy_gtk[32];
2285 size_t gtk_len;
2286 struct wpa_group *gsm;
2287 const u8 *aad[5];
2288 size_t aad_len[5];
2289
2290 if (!sm || !sm->PTK_valid)
2291 return -1;
2292
2293 wpa_hexdump(MSG_DEBUG,
2294 "FILS: Association Response frame before FILS processing",
2295 buf, current_len);
2296
2297 mgmt = (struct ieee80211_mgmt *) buf;
2298
2299 /* AES-SIV AAD vectors */
2300
2301 /* The AP's BSSID */
2302 aad[0] = mgmt->sa;
2303 aad_len[0] = ETH_ALEN;
2304 /* The STA's MAC address */
2305 aad[1] = mgmt->da;
2306 aad_len[1] = ETH_ALEN;
2307 /* The AP's nonce */
2308 aad[2] = sm->ANonce;
2309 aad_len[2] = FILS_NONCE_LEN;
2310 /* The STA's nonce */
2311 aad[3] = sm->SNonce;
2312 aad_len[3] = FILS_NONCE_LEN;
2313 /*
2314 * The (Re)Association Response frame from the Capability Information
2315 * field (the same offset in both Association and Reassociation
2316 * Response frames) to the FILS Session element (both inclusive).
2317 */
2318 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2319 aad_len[4] = pos - aad[4];
2320
2321 /* The following elements will be encrypted with AES-SIV */
2322
2323 plain = wpabuf_alloc(1000);
2324 if (!plain)
2325 return -1;
2326
2327 /* TODO: FILS Public Key */
2328
2329 /* FILS Key Confirmation */
2330 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2331 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2332 /* Element ID Extension */
2333 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2334 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2335
91d91abf
JM		 2336 /* FILS HLP Container */
2337 if (hlp)
2338 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2339
2340 /* TODO: FILS IP Address Assignment */
2341
2342 /* Key Delivery */
2343 gsm = sm->group;
2344 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2345 len = wpabuf_put(plain, 1);
2346 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2347 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2348 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2349 /* GTK KDE */
2350 gtk = gsm->GTK[gsm->GN - 1];
2351 gtk_len = gsm->GTK_len;
2352 if (sm->wpa_auth->conf.disable_gtk) {
2353 /*
2354 * Provide unique random GTK to each STA to prevent use
2355 * of GTK in the BSS.
2356 */
2357 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2358 wpabuf_free(plain);
2359 return -1;
2360 }
2361 gtk = dummy_gtk;
2362 }
2363 hdr[0] = gsm->GN & 0x03;
2364 hdr[1] = 0;
2365 tmp = wpabuf_put(plain, 0);
2366 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2367 gtk, gtk_len);
2368 wpabuf_put(plain, tmp2 - tmp);
2369
2370 /* IGTK KDE */
2371 tmp = wpabuf_put(plain, 0);
2372 tmp2 = ieee80211w_kde_add(sm, tmp);
2373 wpabuf_put(plain, tmp2 - tmp);
2374
2375 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
2376
2377 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2378 wpa_printf(MSG_DEBUG,
2379 "FILS: Not enough room for FILS elements");
2380 wpabuf_free(plain);
2381 return -1;
2382 }
2383
2384 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2385 plain);
2386
2387 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2388 wpabuf_head(plain), wpabuf_len(plain),
2389 5, aad, aad_len, pos) < 0) {
2390 wpabuf_free(plain);
2391 return -1;
2392 }
2393
2394 wpa_hexdump(MSG_DEBUG,
2395 "FILS: Encrypted Association Response elements",
2396 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2397 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2398 wpabuf_free(plain);
2399
07e0117d
JM		 2400 sm->fils_completed = 1;
2401
e73ffa09
JM		 2402 return current_len;
2403}
2404
da24c5aa
JM		 2405
2406int fils_set_tk(struct wpa_state_machine *sm)
2407{
2408 enum wpa_alg alg;
2409 int klen;
2410
2411 if (!sm || !sm->PTK_valid)
2412 return -1;
2413
2414 alg = wpa_cipher_to_alg(sm->pairwise);
2415 klen = wpa_cipher_key_len(sm->pairwise);
2416
2417 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2418 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2419 sm->PTK.tk, klen)) {
2420 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2421 return -1;
2422 }
2423
2424 return 0;
2425}
2426
3b5b7aa8
JM		 2427#endif /* CONFIG_FILS */
2428
2429
6fc6879b
JM		 2430SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2431{
3b5b7aa8 2432 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2433 struct wpa_ptk PTK;
2c502460 2434 int ok = 0, psk_found = 0;
6fc6879b 2435 const u8 *pmk = NULL;
207976f0 2436 unsigned int pmk_len;
3b5b7aa8
JM		 2437 int ft;
2438 const u8 *eapol_key_ie, *key_data, *mic;
2439 u16 key_data_length;
2440 size_t mic_len, eapol_key_ie_len;
2441 struct ieee802_1x_hdr *hdr;
2442 struct wpa_eapol_key *key;
2443 struct wpa_eapol_ie_parse kde;
6fc6879b
JM		 2444
2445 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2446 sm->EAPOLKeyReceived = FALSE;
68921e24 2447 sm->update_snonce = FALSE;
b729fd8d 2448 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2449
3b5b7aa8
JM		 2450 mic_len = wpa_mic_len(sm->wpa_key_mgmt);
2451
6fc6879b
JM		 2452 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2453 * WPA-PSK: iterate through possible PSKs and select the one matching
2454 * the packet */
2455 for (;;) {
56586197 2456 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
759fd76b
JM		 2457 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2458 sm->p2p_dev_addr, pmk);
6fc6879b
JM		 2459 if (pmk == NULL)
2460 break;
2c502460 2461 psk_found = 1;
207976f0
JM		 2462 pmk_len = PMK_LEN;
2463 } else {
6fc6879b 2464 pmk = sm->PMK;
207976f0
JM		 2465 pmk_len = sm->pmk_len;
2466 }
6fc6879b 2467
364c064a
JM		 2468 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2469 break;
6fc6879b 2470
3b5b7aa8
JM		 2471 if (mic_len &&
2472 wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK,
929a2ea5 2473 sm->last_rx_eapol_key,
6fc6879b
JM		 2474 sm->last_rx_eapol_key_len) == 0) {
2475 ok = 1;
2476 break;
2477 }
2478
3b5b7aa8 2479#ifdef CONFIG_FILS
75c8563e
JM		 2480 if (!mic_len &&
2481 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2482 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2483 ok = 1;
2484 break;
2485 }
2486#endif /* CONFIG_FILS */
2487
56586197 2488 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 2489 break;
2490 }
2491
2492 if (!ok) {
2493 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2494 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2495 if (psk_found)
2496 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2497 return;
2498 }
2499
3b5b7aa8
JM		 2500 /*
2501 * Note: last_rx_eapol_key length fields have already been validated in
2502 * wpa_receive().
2503 */
2504 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2505 key = (struct wpa_eapol_key *) (hdr + 1);
2506 mic = (u8 *) (key + 1);
2507 key_data = mic + mic_len + 2;
2508 key_data_length = WPA_GET_BE16(mic + mic_len);
2509 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2510 sizeof(*key) - mic_len - 2)
2511 return;
2512
2513 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2514 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2515 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2516 return;
2517 }
2518 if (kde.rsn_ie) {
2519 eapol_key_ie = kde.rsn_ie;
2520 eapol_key_ie_len = kde.rsn_ie_len;
2521 } else if (kde.osen) {
2522 eapol_key_ie = kde.osen;
2523 eapol_key_ie_len = kde.osen_len;
2524 } else {
2525 eapol_key_ie = kde.wpa_ie;
2526 eapol_key_ie_len = kde.wpa_ie_len;
2527 }
2528 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2529 if (sm->wpa_ie == NULL ||
2530 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2531 eapol_key_ie, eapol_key_ie_len)) {
2532 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2533 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2534 if (sm->wpa_ie) {
2535 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2536 sm->wpa_ie, sm->wpa_ie_len);
2537 }
2538 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2539 eapol_key_ie, eapol_key_ie_len);
2540 /* MLME-DEAUTHENTICATE.request */
2541 wpa_sta_disconnect(wpa_auth, sm->addr);
2542 return;
2543 }
4ec1fd8e 2544#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8
JM		 2545 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
2546 wpa_sta_disconnect(wpa_auth, sm->addr);
2547 return;
2548 }
4ec1fd8e 2549#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2550#ifdef CONFIG_P2P
2551 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2552 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2553 int idx;
2554 wpa_printf(MSG_DEBUG,
2555 "P2P: IP address requested in EAPOL-Key exchange");
2556 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2557 if (idx >= 0) {
2558 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2559 bitfield_set(wpa_auth->ip_pool, idx);
2560 WPA_PUT_BE32(sm->ip_addr, start + idx);
2561 wpa_printf(MSG_DEBUG,
2562 "P2P: Assigned IP address %u.%u.%u.%u to "
2563 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2564 sm->ip_addr[2], sm->ip_addr[3],
2565 MAC2STR(sm->addr));
2566 }
2567 }
2568#endif /* CONFIG_P2P */
2569
4ec1fd8e 2570#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2571 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2572 /*
2573 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2574 * with the value we derived.
2575 */
870834a1
JM		 2576 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2577 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2578 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2579 "PMKR1Name mismatch in FT 4-way "
2580 "handshake");
2581 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2582 "Supplicant",
2583 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2584 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2585 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2586 return;
2587 }
2588 }
4ec1fd8e 2589#endif /* CONFIG_IEEE80211R_AP */
26e23750 2590
e4bf4db9 2591 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2592 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2593
56586197 2594 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2595 /* PSK may have changed from the previous choice, so update
2596 * state machine data based on whatever PSK was selected here.
2597 */
2598 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2599 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2600 }
2601
2602 sm->MICVerified = TRUE;
2603
2604 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2605 sm->PTK_valid = TRUE;
2606}
2607
2608
2609SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2610{
2611 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2612 sm->TimeoutCtr = 0;
2613}
2614
2615
2616#ifdef CONFIG_IEEE80211W
2617
2618static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2619{
2620 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2621 size_t len;
2622 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2623 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2624 }
2625
2626 return 0;
2627}
2628
2629
2630static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2631{
2632 struct wpa_igtk_kde igtk;
2633 struct wpa_group *gsm = sm->group;
03610ad2 2634 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 2635 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 2636
2637 if (!sm->mgmt_frame_prot)
2638 return pos;
2639
2640 igtk.keyid[0] = gsm->GN_igtk;
2641 igtk.keyid[1] = 0;
7b1080da 2642 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 2643 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 2644 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 2645 else
2646 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 2647 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
83421850
JM		 2648 if (sm->wpa_auth->conf.disable_gtk) {
2649 /*
2650 * Provide unique random IGTK to each STA to prevent use of
2651 * IGTK in the BSS.
2652 */
8dd9f9cd 2653 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 2654 return pos;
2655 }
6fc6879b 2656 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 2657 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2658 NULL, 0);
6fc6879b
JM		 2659
2660 return pos;
2661}
2662
2663#else /* CONFIG_IEEE80211W */
2664
2665static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2666{
2667 return 0;
2668}
2669
2670
2671static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2672{
2673 return pos;
2674}
2675
2676#endif /* CONFIG_IEEE80211W */
2677
2678
2679SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2680{
83421850 2681 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 2682 size_t gtk_len, kde_len;
2683 struct wpa_group *gsm = sm->group;
2684 u8 *wpa_ie;
2685 int wpa_ie_len, secure, keyidx, encr = 0;
2686
2687 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2688 sm->TimeoutEvt = FALSE;
bae61562
JM		 2689
2690 sm->TimeoutCtr++;
41f140d3 2691 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2692 /* No point in sending the EAPOL-Key - we will disconnect
2693 * immediately following this. */
2694 return;
2695 }
2696
86dfabb8
JM		 2697 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2698 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2699 */
2700 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2701 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2702 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2703 wpa_ie = sm->wpa_auth->wpa_ie;
2704 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2705 if (sm->wpa == WPA_VERSION_WPA &&
2706 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2707 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 2708 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 2709 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 2710 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2711 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 2712 wpa_ie_len = wpa_ie[1] + 2;
2713 }
2714 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2715 "sending 3/4 msg of 4-Way Handshake");
2716 if (sm->wpa == WPA_VERSION_WPA2) {
2717 /* WPA2 send GTK in the 4-way handshake */
2718 secure = 1;
2719 gtk = gsm->GTK[gsm->GN - 1];
2720 gtk_len = gsm->GTK_len;
83421850
JM		 2721 if (sm->wpa_auth->conf.disable_gtk) {
2722 /*
2723 * Provide unique random GTK to each STA to prevent use
2724 * of GTK in the BSS.
2725 */
2726 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2727 return;
2728 gtk = dummy_gtk;
2729 }
6fc6879b
JM		 2730 keyidx = gsm->GN;
2731 _rsc = rsc;
2732 encr = 1;
2733 } else {
2734 /* WPA does not include GTK in msg 3/4 */
2735 secure = 0;
2736 gtk = NULL;
2737 gtk_len = 0;
2738 keyidx = 0;
2739 _rsc = NULL;
0d442aff
JM		 2740 if (sm->rx_eapol_key_secure) {
2741 /*
2742 * It looks like Windows 7 supplicant tries to use
2743 * Secure bit in msg 2/4 after having reported Michael
2744 * MIC failure and it then rejects the 4-way handshake
2745 * if msg 3/4 does not set Secure bit. Work around this
2746 * by setting the Secure bit here even in the case of
2747 * WPA if the supplicant used it first.
2748 */
2749 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2750 "STA used Secure bit in WPA msg 2/4 - "
2751 "set Secure for 3/4 as workaround");
0d442aff
JM		 2752 secure = 1;
2753 }
6fc6879b
JM		 2754 }
2755
2756 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2757 if (gtk)
2758 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 2759#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2760 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2761 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2762 kde_len += 300; /* FTIE + 2 * TIE */
2763 }
4ec1fd8e 2764#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 2765#ifdef CONFIG_P2P
2766 if (WPA_GET_BE32(sm->ip_addr) > 0)
2767 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2768#endif /* CONFIG_P2P */
6fc6879b
JM		 2769 kde = os_malloc(kde_len);
2770 if (kde == NULL)
2771 return;
2772
2773 pos = kde;
2774 os_memcpy(pos, wpa_ie, wpa_ie_len);
2775 pos += wpa_ie_len;
4ec1fd8e 2776#ifdef CONFIG_IEEE80211R_AP
26e23750 2777 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 2778 int res;
2779 size_t elen;
2780
2781 elen = pos - kde;
2782 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 2783 if (res < 0) {
2784 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2785 "PMKR1Name into RSN IE in EAPOL-Key data");
2786 os_free(kde);
2787 return;
2788 }
59e78c24
JM		 2789 pos -= wpa_ie_len;
2790 pos += elen;
26e23750 2791 }
4ec1fd8e 2792#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2793 if (gtk) {
2794 u8 hdr[2];
2795 hdr[0] = keyidx & 0x03;
2796 hdr[1] = 0;
2797 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2798 gtk, gtk_len);
2799 }
2800 pos = ieee80211w_kde_add(sm, pos);
2801
4ec1fd8e 2802#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2803 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2804 int res;
2805 struct wpa_auth_config *conf;
2806
2807 conf = &sm->wpa_auth->conf;
9257610a
JM		 2808 if (sm->assoc_resp_ftie &&
2809 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
2810 os_memcpy(pos, sm->assoc_resp_ftie,
2811 2 + sm->assoc_resp_ftie[1]);
2812 res = 2 + sm->assoc_resp_ftie[1];
2813 } else {
2814 res = wpa_write_ftie(conf, conf->r0_key_holder,
2815 conf->r0_key_holder_len,
2816 NULL, NULL, pos,
2817 kde + kde_len - pos,
2818 NULL, 0);
2819 }
86dfabb8
JM		 2820 if (res < 0) {
2821 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2822 "into EAPOL-Key Key Data");
2823 os_free(kde);
2824 return;
2825 }
2826 pos += res;
2827
2828 /* TIE[ReassociationDeadline] (TU) */
2829 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2830 *pos++ = 5;
2831 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2832 WPA_PUT_LE32(pos, conf->reassociation_deadline);
2833 pos += 4;
2834
2835 /* TIE[KeyLifetime] (seconds) */
2836 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2837 *pos++ = 5;
2838 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2839 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2840 pos += 4;
2841 }
4ec1fd8e 2842#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 2843#ifdef CONFIG_P2P
2844 if (WPA_GET_BE32(sm->ip_addr) > 0) {
2845 u8 addr[3 * 4];
2846 os_memcpy(addr, sm->ip_addr, 4);
2847 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2848 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2849 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2850 addr, sizeof(addr), NULL, 0);
2851 }
2852#endif /* CONFIG_P2P */
86dfabb8 2853
6fc6879b 2854 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d
JM		 2855 (secure ? WPA_KEY_INFO_SECURE : 0) |
2856 (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 2857 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2858 WPA_KEY_INFO_KEY_TYPE,
2859 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2860 os_free(kde);
6fc6879b
JM		 2861}
2862
2863
2864SM_STATE(WPA_PTK, PTKINITDONE)
2865{
2866 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2867 sm->EAPOLKeyReceived = FALSE;
2868 if (sm->Pair) {
c3550295
JM		 2869 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2870 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 2871 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 2872 sm->PTK.tk, klen)) {
6fc6879b
JM		 2873 wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2874 return;
2875 }
2876 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2877 sm->pairwise_set = TRUE;
2878
581a8cde
JM		 2879 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2880 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2881 eloop_register_timeout(sm->wpa_auth->conf.
2882 wpa_ptk_rekey, 0, wpa_rekey_ptk,
2883 sm->wpa_auth, sm);
2884 }
2885
56586197 2886 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2887 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2888 WPA_EAPOL_authorized, 1);
2889 }
2890 }
2891
2892 if (0 /* IBSS == TRUE */) {
2893 sm->keycount++;
2894 if (sm->keycount == 2) {
2895 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2896 WPA_EAPOL_portValid, 1);
2897 }
2898 } else {
2899 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2900 1);
2901 }
2902 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2903 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2904 if (sm->wpa == WPA_VERSION_WPA)
2905 sm->PInitAKeys = TRUE;
2906 else
2907 sm->has_GTK = TRUE;
2908 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2909 "pairwise key handshake completed (%s)",
2910 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2911
4ec1fd8e 2912#ifdef CONFIG_IEEE80211R_AP
6fc6879b 2913 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 2914#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2915}
2916
2917
2918SM_STEP(WPA_PTK)
2919{
2920 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2921
2922 if (sm->Init)
2923 SM_ENTER(WPA_PTK, INITIALIZE);
2924 else if (sm->Disconnect
1aae01fc
BG		 2925 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2926 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2927 "WPA_PTK: sm->Disconnect");
6fc6879b 2928 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 2929 }
6fc6879b
JM		 2930 else if (sm->DeauthenticationRequest)
2931 SM_ENTER(WPA_PTK, DISCONNECTED);
2932 else if (sm->AuthenticationRequest)
2933 SM_ENTER(WPA_PTK, AUTHENTICATION);
2934 else if (sm->ReAuthenticationRequest)
2935 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2936 else if (sm->PTKRequest)
2937 SM_ENTER(WPA_PTK, PTKSTART);
2938 else switch (sm->wpa_ptk_state) {
2939 case WPA_PTK_INITIALIZE:
2940 break;
2941 case WPA_PTK_DISCONNECT:
2942 SM_ENTER(WPA_PTK, DISCONNECTED);
2943 break;
2944 case WPA_PTK_DISCONNECTED:
2945 SM_ENTER(WPA_PTK, INITIALIZE);
2946 break;
2947 case WPA_PTK_AUTHENTICATION:
2948 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2949 break;
2950 case WPA_PTK_AUTHENTICATION2:
56586197 2951 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 2952 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2953 WPA_EAPOL_keyRun) > 0)
2954 SM_ENTER(WPA_PTK, INITPMK);
56586197 2955 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
6fc6879b
JM		 2956 /* FIX: && 802.1X::keyRun */)
2957 SM_ENTER(WPA_PTK, INITPSK);
2958 break;
2959 case WPA_PTK_INITPMK:
2960 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2961 WPA_EAPOL_keyAvailable) > 0)
2962 SM_ENTER(WPA_PTK, PTKSTART);
2963 else {
2964 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 2965 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2966 "INITPMK - keyAvailable = false");
6fc6879b
JM		 2967 SM_ENTER(WPA_PTK, DISCONNECT);
2968 }
2969 break;
2970 case WPA_PTK_INITPSK:
759fd76b
JM		 2971 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2972 NULL))
6fc6879b
JM		 2973 SM_ENTER(WPA_PTK, PTKSTART);
2974 else {
2975 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2976 "no PSK configured for the STA");
2977 wpa_auth->dot11RSNA4WayHandshakeFailures++;
2978 SM_ENTER(WPA_PTK, DISCONNECT);
2979 }
2980 break;
2981 case WPA_PTK_PTKSTART:
2982 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2983 sm->EAPOLKeyPairwise)
2984 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2985 else if (sm->TimeoutCtr >
41f140d3 2986 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 2987 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 2988 wpa_auth_vlogger(
2989 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2990 "PTKSTART: Retry limit %u reached",
2991 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 2992 SM_ENTER(WPA_PTK, DISCONNECT);
2993 } else if (sm->TimeoutEvt)
2994 SM_ENTER(WPA_PTK, PTKSTART);
2995 break;
2996 case WPA_PTK_PTKCALCNEGOTIATING:
2997 if (sm->MICVerified)
2998 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2999 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3000 sm->EAPOLKeyPairwise)
3001 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3002 else if (sm->TimeoutEvt)
3003 SM_ENTER(WPA_PTK, PTKSTART);
3004 break;
3005 case WPA_PTK_PTKCALCNEGOTIATING2:
3006 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3007 break;
3008 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3009 if (sm->update_snonce)
3010 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3011 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3012 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3013 SM_ENTER(WPA_PTK, PTKINITDONE);
3014 else if (sm->TimeoutCtr >
41f140d3 3015 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3016 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3017 wpa_auth_vlogger(
3018 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3019 "PTKINITNEGOTIATING: Retry limit %u reached",
3020 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3021 SM_ENTER(WPA_PTK, DISCONNECT);
3022 } else if (sm->TimeoutEvt)
3023 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3024 break;
3025 case WPA_PTK_PTKINITDONE:
3026 break;
3027 }
3028}
3029
3030
3031SM_STATE(WPA_PTK_GROUP, IDLE)
3032{
3033 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3034 if (sm->Init) {
3035 /* Init flag is not cleared here, so avoid busy
3036 * loop by claiming nothing changed. */
3037 sm->changed = FALSE;
3038 }
3039 sm->GTimeoutCtr = 0;
3040}
3041
3042
3043SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3044{
3045 u8 rsc[WPA_KEY_RSC_LEN];
3046 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3047 const u8 *kde;
3048 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3049 size_t kde_len;
83421850 3050 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3051
3052 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3053
3054 sm->GTimeoutCtr++;
41f140d3 3055 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3056 /* No point in sending the EAPOL-Key - we will disconnect
3057 * immediately following this. */
3058 return;
3059 }
3060
6fc6879b
JM		 3061 if (sm->wpa == WPA_VERSION_WPA)
3062 sm->PInitAKeys = FALSE;
3063 sm->TimeoutEvt = FALSE;
3064 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3065 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3066 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3067 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3068 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3069 "sending 1/2 msg of Group Key Handshake");
3070
83421850
JM		 3071 gtk = gsm->GTK[gsm->GN - 1];
3072 if (sm->wpa_auth->conf.disable_gtk) {
3073 /*
3074 * Provide unique random GTK to each STA to prevent use
3075 * of GTK in the BSS.
3076 */
3077 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3078 return;
3079 gtk = dummy_gtk;
3080 }
6fc6879b
JM		 3081 if (sm->wpa == WPA_VERSION_WPA2) {
3082 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3083 ieee80211w_kde_len(sm);
e41e4f9e
JM		 3084 kde_buf = os_malloc(kde_len);
3085 if (kde_buf == NULL)
6fc6879b
JM		 3086 return;
3087
e41e4f9e 3088 kde = pos = kde_buf;
6fc6879b
JM		 3089 hdr[0] = gsm->GN & 0x03;
3090 hdr[1] = 0;
3091 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3092 gtk, gsm->GTK_len);
6fc6879b 3093 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 3094 kde_len = pos - kde;
6fc6879b 3095 } else {
83421850 3096 kde = gtk;
e41e4f9e 3097 kde_len = gsm->GTK_len;
6fc6879b
JM		 3098 }
3099
3100 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d
JM		 3101 WPA_KEY_INFO_SECURE |
3102 (wpa_mic_len(sm->wpa_key_mgmt) ? WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3103 WPA_KEY_INFO_ACK |
3104 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3105 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3106
3107 os_free(kde_buf);
6fc6879b
JM		 3108}
3109
3110
3111SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3112{
3113 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3114 sm->EAPOLKeyReceived = FALSE;
3115 if (sm->GUpdateStationKeys)
3116 sm->group->GKeyDoneStations--;
3117 sm->GUpdateStationKeys = FALSE;
3118 sm->GTimeoutCtr = 0;
3119 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3120 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3121 "group key handshake completed (%s)",
3122 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3123 sm->has_GTK = TRUE;
3124}
3125
3126
3127SM_STATE(WPA_PTK_GROUP, KEYERROR)
3128{
3129 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3130 if (sm->GUpdateStationKeys)
3131 sm->group->GKeyDoneStations--;
3132 sm->GUpdateStationKeys = FALSE;
3133 sm->Disconnect = TRUE;
4bb9b674
GK		 3134 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3135 "group key handshake failed (%s) after %u tries",
3136 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3137 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3138}
3139
3140
3141SM_STEP(WPA_PTK_GROUP)
3142{
9663596f 3143 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3144 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3145 sm->PtkGroupInit = FALSE;
3146 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3147 case WPA_PTK_GROUP_IDLE:
3148 if (sm->GUpdateStationKeys ||
3149 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3150 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3151 break;
3152 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3153 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3154 !sm->EAPOLKeyPairwise && sm->MICVerified)
3155 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3156 else if (sm->GTimeoutCtr >
41f140d3 3157 sm->wpa_auth->conf.wpa_group_update_count)
6fc6879b
JM		 3158 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3159 else if (sm->TimeoutEvt)
3160 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3161 break;
3162 case WPA_PTK_GROUP_KEYERROR:
3163 SM_ENTER(WPA_PTK_GROUP, IDLE);
3164 break;
3165 case WPA_PTK_GROUP_REKEYESTABLISHED:
3166 SM_ENTER(WPA_PTK_GROUP, IDLE);
3167 break;
3168 }
3169}
3170
3171
3172static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3173 struct wpa_group *group)
3174{
3175 int ret = 0;
3176
6fc6879b
JM		 3177 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3178 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3179 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3180 wpa_auth->addr, group->GNonce,
3181 group->GTK[group->GN - 1], group->GTK_len) < 0)
3182 ret = -1;
5cb9d5c3
JM		 3183 wpa_hexdump_key(MSG_DEBUG, "GTK",
3184 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 3185
3186#ifdef CONFIG_IEEE80211W
70f8cc8e 3187 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3188 size_t len;
3189 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3190 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3191 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3192 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3193 wpa_auth->addr, group->GNonce,
8dd9f9cd 3194 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3195 ret = -1;
6fc6879b 3196 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3197 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 3198 }
3199#endif /* CONFIG_IEEE80211W */
3200
3201 return ret;
3202}
3203
3204
3205static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3206 struct wpa_group *group)
3207{
3208 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3209 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3210 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3211 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3212
3213 /* GTK[0..N] = 0 */
3214 os_memset(group->GTK, 0, sizeof(group->GTK));
3215 group->GN = 1;
3216 group->GM = 2;
3217#ifdef CONFIG_IEEE80211W
3218 group->GN_igtk = 4;
3219 group->GM_igtk = 5;
3220#endif /* CONFIG_IEEE80211W */
3221 /* GTK[GN] = CalcGTK() */
3222 wpa_gtk_update(wpa_auth, group);
3223}
3224
3225
3226static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3227{
473b6f22
MB		 3228 if (ctx != NULL && ctx != sm->group)
3229 return 0;
3230
6fc6879b
JM		 3231 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3232 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3233 "Not in PTKINITDONE; skip Group Key update");
3c183894 3234 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3235 return 0;
3236 }
9663596f
JM		 3237 if (sm->GUpdateStationKeys) {
3238 /*
3c183894
JM		 3239 * This should not really happen, so add a debug log entry.
3240 * Since we clear the GKeyDoneStations before the loop, the
3241 * station needs to be counted here anyway.
9663596f
JM		 3242 */
3243 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3244 "GUpdateStationKeys was already set when "
3245 "marking station for GTK rekeying");
9663596f 3246 }
3c183894 3247
ad3872a3 3248 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3249 if (sm->is_wnmsleep)
3250 return 0;
d32d94db 3251
3c183894
JM		 3252 sm->group->GKeyDoneStations++;
3253 sm->GUpdateStationKeys = TRUE;
3254
6fc6879b
JM		 3255 wpa_sm_step(sm);
3256 return 0;
3257}
3258
3259
ad3872a3
JM		 3260#ifdef CONFIG_WNM
3261/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3262void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3263{
629edfef 3264 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3265 return;
3266
3267 wpa_group_update_sta(sm, NULL);
3268}
3269
3270
3271void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3272{
629edfef
JM		 3273 if (sm)
3274 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3275}
3276
3277
3278int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3279{
d32d94db 3280 struct wpa_group *gsm = sm->group;
835822d4 3281 u8 *start = pos;
d32d94db
XC		 3282
3283 /*
835822d4 3284 * GTK subelement:
d32d94db 3285 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3286 * Key[5..32]
d32d94db 3287 */
835822d4
JM		 3288 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3289 *pos++ = 11 + gsm->GTK_len;
d32d94db 3290 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3291 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3292 pos += 2;
3293 *pos++ = gsm->GTK_len;
3294 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3295 return 0;
835822d4
JM		 3296 pos += 8;
3297 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3298 pos += gsm->GTK_len;
d32d94db 3299
835822d4
JM		 3300 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3301 gsm->GN);
3302 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3303 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3304
835822d4 3305 return pos - start;
d32d94db
XC		 3306}
3307
3308
3309#ifdef CONFIG_IEEE80211W
3310int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3311{
d32d94db 3312 struct wpa_group *gsm = sm->group;
835822d4 3313 u8 *start = pos;
8dd9f9cd 3314 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3315
835822d4
JM		 3316 /*
3317 * IGTK subelement:
3318 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3319 */
3320 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3321 *pos++ = 2 + 6 + len;
835822d4
JM		 3322 WPA_PUT_LE16(pos, gsm->GN_igtk);
3323 pos += 2;
3324 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3325 return 0;
835822d4 3326 pos += 6;
d32d94db 3327
8dd9f9cd
JM		 3328 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3329 pos += len;
d32d94db 3330
835822d4
JM		 3331 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3332 gsm->GN_igtk);
3333 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3334 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3335
835822d4 3336 return pos - start;
d32d94db
XC		 3337}
3338#endif /* CONFIG_IEEE80211W */
ad3872a3 3339#endif /* CONFIG_WNM */
d32d94db
XC		 3340
3341
6fc6879b
JM		 3342static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3343 struct wpa_group *group)
3344{
3345 int tmp;
3346
3347 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3348 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3349 group->changed = TRUE;
3350 group->wpa_group_state = WPA_GROUP_SETKEYS;
3351 group->GTKReKey = FALSE;
3352 tmp = group->GM;
3353 group->GM = group->GN;
3354 group->GN = tmp;
3355#ifdef CONFIG_IEEE80211W
3356 tmp = group->GM_igtk;
3357 group->GM_igtk = group->GN_igtk;
3358 group->GN_igtk = tmp;
3359#endif /* CONFIG_IEEE80211W */
3360 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3361 * counting the STAs that are marked with GUpdateStationKeys instead of
3362 * including all STAs that could be in not-yet-completed state. */
3363 wpa_gtk_update(wpa_auth, group);
3364
3c183894
JM		 3365 if (group->GKeyDoneStations) {
3366 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3367 "GKeyDoneStations=%d when starting new GTK rekey",
3368 group->GKeyDoneStations);
3369 group->GKeyDoneStations = 0;
3370 }
473b6f22 3371 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3372 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3373 group->GKeyDoneStations);
3374}
3375
3376
1bdb7ab3
JM		 3377static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3378 struct wpa_group *group)
6fc6879b 3379{
3c7302c2
JM		 3380 int ret = 0;
3381
3c7302c2 3382 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3383 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3384 broadcast_ether_addr, group->GN,
3385 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3386 ret = -1;
6fc6879b
JM		 3387
3388#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3389 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3390 enum wpa_alg alg;
3391 size_t len;
3392
3393 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3394 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3395
3396 if (ret == 0 &&
3397 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3398 broadcast_ether_addr, group->GN_igtk,
3399 group->IGTK[group->GN_igtk - 4], len) < 0)
3400 ret = -1;
3401 }
6fc6879b 3402#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3403
3404 return ret;
6fc6879b
JM		 3405}
3406
3407
7d7f7be2
JM		 3408static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3409{
3410 if (sm->group == ctx) {
3411 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3412 " for discconnection due to fatal failure",
3413 MAC2STR(sm->addr));
3414 sm->Disconnect = TRUE;
3415 }
3416
3417 return 0;
3418}
3419
3420
3421static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3422 struct wpa_group *group)
3423{
3424 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3425 group->changed = TRUE;
3426 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3427 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3428}
3429
3430
1bdb7ab3
JM		 3431static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3432 struct wpa_group *group)
3433{
3434 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3435 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3436 group->changed = TRUE;
3437 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3438
7d7f7be2
JM		 3439 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3440 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3441 return -1;
7d7f7be2 3442 }
1bdb7ab3
JM		 3443
3444 return 0;
3445}
3446
3447
6fc6879b
JM		 3448static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3449 struct wpa_group *group)
3450{
3451 if (group->GInit) {
3452 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3453 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3454 /* Do not allow group operations */
6fc6879b
JM		 3455 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3456 group->GTKAuthenticator) {
3457 wpa_group_setkeysdone(wpa_auth, group);
3458 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3459 group->GTKReKey) {
3460 wpa_group_setkeys(wpa_auth, group);
3461 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3462 if (group->GKeyDoneStations == 0)
3463 wpa_group_setkeysdone(wpa_auth, group);
3464 else if (group->GTKReKey)
3465 wpa_group_setkeys(wpa_auth, group);
3466 }
3467}
3468
3469
e4a6ea1d 3470static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 3471{
3472 if (sm == NULL)
e4a6ea1d 3473 return 0;
6fc6879b
JM		 3474
3475 if (sm->in_step_loop) {
3476 /* This should not happen, but if it does, make sure we do not
3477 * end up freeing the state machine too early by exiting the
3478 * recursive call. */
3479 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 3480 return 0;
6fc6879b
JM		 3481 }
3482
3483 sm->in_step_loop = 1;
3484 do {
3485 if (sm->pending_deinit)
3486 break;
3487
3488 sm->changed = FALSE;
3489 sm->wpa_auth->group->changed = FALSE;
3490
3491 SM_STEP_RUN(WPA_PTK);
3492 if (sm->pending_deinit)
3493 break;
3494 SM_STEP_RUN(WPA_PTK_GROUP);
3495 if (sm->pending_deinit)
3496 break;
3497 wpa_group_sm_step(sm->wpa_auth, sm->group);
3498 } while (sm->changed || sm->wpa_auth->group->changed);
3499 sm->in_step_loop = 0;
3500
3501 if (sm->pending_deinit) {
3502 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3503 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3504 wpa_free_sta_sm(sm);
e4a6ea1d 3505 return 1;
6fc6879b 3506 }
e4a6ea1d 3507 return 0;
6fc6879b
JM		 3508}
3509
3510
3511static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3512{
3513 struct wpa_state_machine *sm = eloop_ctx;
3514 wpa_sm_step(sm);
3515}
3516
3517
3518void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3519{
3520 if (sm == NULL)
3521 return;
3522 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3523}
3524
3525
3526void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3527{
3528 int tmp, i;
3529 struct wpa_group *group;
3530
3531 if (wpa_auth == NULL)
3532 return;
3533
3534 group = wpa_auth->group;
3535
3536 for (i = 0; i < 2; i++) {
3537 tmp = group->GM;
3538 group->GM = group->GN;
3539 group->GN = tmp;
3540#ifdef CONFIG_IEEE80211W
3541 tmp = group->GM_igtk;
3542 group->GM_igtk = group->GN_igtk;
3543 group->GN_igtk = tmp;
3544#endif /* CONFIG_IEEE80211W */
3545 wpa_gtk_update(wpa_auth, group);
9354e594 3546 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 3547 }
3548}
3549
3550
a6da824b 3551static const char * wpa_bool_txt(int val)
6fc6879b 3552{
a6da824b 3553 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 3554}
3555
3556
6fc6879b
JM		 3557#define RSN_SUITE "%02x-%02x-%02x-%d"
3558#define RSN_SUITE_ARG(s) \
3559((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3560
3561int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3562{
3563 int len = 0, ret;
3564 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 3565#ifdef CONFIG_RSN_PREAUTH
3566 const int preauth = 1;
3567#else /* CONFIG_RSN_PREAUTH */
3568 const int preauth = 0;
3569#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 3570
3571 if (wpa_auth == NULL)
3572 return len;
3573
3574 ret = os_snprintf(buf + len, buflen - len,
3575 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 3576 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 3577 "dot11RSNAEnabled=%s\n"
3578 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 3579 wpa_bool_txt(preauth),
6fc6879b
JM		 3580 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3581 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 3582 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3583 return len;
3584 len += ret;
3585
3586 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3587 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3588
3589 ret = os_snprintf(
3590 buf + len, buflen - len,
3591 "dot11RSNAConfigVersion=%u\n"
3592 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3593 /* FIX: dot11RSNAConfigGroupCipher */
3594 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3595 /* FIX: dot11RSNAConfigGroupRekeyTime */
3596 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3597 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3598 "dot11RSNAConfigGroupUpdateCount=%u\n"
3599 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3600 "dot11RSNAConfigGroupCipherSize=%u\n"
3601 "dot11RSNAConfigPMKLifetime=%u\n"
3602 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3603 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3604 "dot11RSNAConfigSATimeout=%u\n"
3605 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3606 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3607 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3608 "dot11RSNAPMKIDUsed=%s\n"
3609 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3610 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3611 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3612 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3613 "dot11RSNA4WayHandshakeFailures=%u\n"
3614 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3615 RSN_VERSION,
3616 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 3617 wpa_auth->conf.wpa_group_update_count,
3618 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 3619 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 3620 dot11RSNAConfigPMKLifetime,
3621 dot11RSNAConfigPMKReauthThreshold,
3622 dot11RSNAConfigSATimeout,
3623 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3624 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3625 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3626 pmkid_txt,
3627 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3628 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3629 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3630 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3631 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 3632 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3633 return len;
3634 len += ret;
3635
3636 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3637 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3638
3639 /* Private MIB */
3640 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3641 wpa_auth->group->wpa_group_state);
d85e1fc8 3642 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3643 return len;
3644 len += ret;
3645
3646 return len;
3647}
3648
3649
3650int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3651{
3652 int len = 0, ret;
3653 u32 pairwise = 0;
3654
3655 if (sm == NULL)
3656 return 0;
3657
3658 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3659
3660 /* dot11RSNAStatsEntry */
3661
c3550295
JM		 3662 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3663 WPA_PROTO_RSN : WPA_PROTO_WPA,
3664 sm->pairwise);
3665 if (pairwise == 0)
6fc6879b
JM		 3666 return 0;
3667
3668 ret = os_snprintf(
3669 buf + len, buflen - len,
3670 /* TODO: dot11RSNAStatsIndex */
3671 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3672 "dot11RSNAStatsVersion=1\n"
3673 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3674 /* TODO: dot11RSNAStatsTKIPICVErrors */
3675 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 3676 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 3677 /* TODO: dot11RSNAStatsCCMPReplays */
3678 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3679 /* TODO: dot11RSNAStatsTKIPReplays */,
3680 MAC2STR(sm->addr),
3681 RSN_SUITE_ARG(pairwise),
3682 sm->dot11RSNAStatsTKIPLocalMICFailures,
3683 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 3684 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3685 return len;
3686 len += ret;
3687
3688 /* Private MIB */
3689 ret = os_snprintf(buf + len, buflen - len,
3690 "hostapdWPAPTKState=%d\n"
3691 "hostapdWPAPTKGroupState=%d\n",
3692 sm->wpa_ptk_state,
3693 sm->wpa_ptk_group_state);
d85e1fc8 3694 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3695 return len;
3696 len += ret;
3697
3698 return len;
3699}
3700
3701
3702void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3703{
3704 if (wpa_auth)
3705 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3706}
3707
3708
3709int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3710{
3711 return sm && sm->pairwise_set;
3712}
3713
3714
ff36ff00
JM		 3715int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3716{
3717 return sm->pairwise;
3718}
3719
3720
6fc6879b
JM		 3721int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3722{
3723 if (sm == NULL)
3724 return -1;
3725 return sm->wpa_key_mgmt;
3726}
3727
3728
3729int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3730{
3731 if (sm == NULL)
3732 return 0;
3733 return sm->wpa;
3734}
3735
3736
3737int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3738 struct rsn_pmksa_cache_entry *entry)
3739{
3740 if (sm == NULL || sm->pmksa != entry)
3741 return -1;
3742 sm->pmksa = NULL;
3743 return 0;
3744}
3745
3746
3747struct rsn_pmksa_cache_entry *
3748wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3749{
3750 return sm ? sm->pmksa : NULL;
3751}
3752
3753
3754void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3755{
3756 if (sm)
3757 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3758}
3759
3760
3761const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3762{
3763 if (wpa_auth == NULL)
3764 return NULL;
3765 *len = wpa_auth->wpa_ie_len;
3766 return wpa_auth->wpa_ie;
3767}
3768
3769
3770int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 3771 unsigned int pmk_len,
6fc6879b
JM		 3772 int session_timeout, struct eapol_state_machine *eapol)
3773{
cb465555
JM		 3774 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3775 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 3776 return -1;
3777
207976f0
JM		 3778 if (sm->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) {
3779 if (pmk_len > PMK_LEN_SUITE_B_192)
3780 pmk_len = PMK_LEN_SUITE_B_192;
3781 } else if (pmk_len > PMK_LEN) {
3782 pmk_len = PMK_LEN;
3783 }
3784
70c93963 3785 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 3786 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 3787 sm->wpa_auth->addr, sm->addr, session_timeout,
3788 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 3789 return 0;
3790
3791 return -1;
3792}
3793
3794
3795int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3796 const u8 *pmk, size_t len, const u8 *sta_addr,
3797 int session_timeout,
3798 struct eapol_state_machine *eapol)
3799{
3800 if (wpa_auth == NULL)
3801 return -1;
3802
70c93963 3803 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 3804 NULL, 0,
3805 wpa_auth->addr,
4bb081f1
JM		 3806 sta_addr, session_timeout, eapol,
3807 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 3808 return 0;
3809
3810 return -1;
3811}
3812
3813
f2991170 3814int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 3815 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 3816{
3817 if (wpa_auth->conf.disable_pmksa_caching)
3818 return -1;
3819
70c93963 3820 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 3821 NULL, 0,
f2991170
JM		 3822 wpa_auth->addr, addr, 0, NULL,
3823 WPA_KEY_MGMT_SAE))
3824 return 0;
3825
3826 return -1;
3827}
3828
3829
901d1fe1
JM		 3830void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3831 const u8 *sta_addr)
3832{
3833 struct rsn_pmksa_cache_entry *pmksa;
3834
3835 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3836 return;
3837 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3838 if (pmksa) {
3839 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3840 MACSTR " based on request", MAC2STR(sta_addr));
3841 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3842 }
3843}
3844
3845
b8daac18
MH		 3846int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
3847 size_t len)
3848{
3849 if (!wpa_auth || !wpa_auth->pmksa)
3850 return 0;
3851 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
3852}
3853
3854
4c522c77
MH		 3855void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
3856{
3857 if (wpa_auth && wpa_auth->pmksa)
3858 pmksa_cache_auth_flush(wpa_auth->pmksa);
3859}
3860
3861
4d77d80e
MH		 3862#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
3863#ifdef CONFIG_MESH
3864
3865int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
3866 char *buf, size_t len)
3867{
3868 if (!wpa_auth || !wpa_auth->pmksa)
3869 return 0;
3870
3871 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
3872}
3873
3874
3875struct rsn_pmksa_cache_entry *
3876wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
3877 const u8 *pmkid, int expiration)
3878{
3879 struct rsn_pmksa_cache_entry *entry;
3880 struct os_reltime now;
3881
3882 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
3883 spa, 0, NULL, WPA_KEY_MGMT_SAE);
3884 if (!entry)
3885 return NULL;
3886
3887 os_get_reltime(&now);
3888 entry->expiration = now.sec + expiration;
3889 return entry;
3890}
3891
3892
3893int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
3894 struct rsn_pmksa_cache_entry *entry)
3895{
3896 int ret;
3897
3898 if (!wpa_auth || !wpa_auth->pmksa)
3899 return -1;
3900
3901 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
3902 if (ret < 0)
3903 wpa_printf(MSG_DEBUG,
3904 "RSN: Failed to store external PMKSA cache for "
3905 MACSTR, MAC2STR(entry->spa));
3906
3907 return ret;
3908}
3909
3910#endif /* CONFIG_MESH */
3911#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
3912
3913
9f2cf23e 3914struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 3915wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
3916 const u8 *pmkid)
9f2cf23e
MH		 3917{
3918 if (!wpa_auth || !wpa_auth->pmksa)
3919 return NULL;
c1bd4bac 3920 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 3921}
3922
3923
3924void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
3925 struct wpa_state_machine *sm,
3926 struct wpa_authenticator *wpa_auth,
3927 u8 *pmkid, u8 *pmk)
3928{
3929 if (!sm)
3930 return;
3931
3932 sm->pmksa = pmksa;
8854f90b
JM		 3933 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
3934 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
3935 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 3936}
3937
3938
a0ad9e8c
MB		 3939/*
3940 * Remove and free the group from wpa_authenticator. This is triggered by a
3941 * callback to make sure nobody is currently iterating the group list while it
3942 * gets modified.
3943 */
3944static void wpa_group_free(struct wpa_authenticator *wpa_auth,
3945 struct wpa_group *group)
3946{
3947 struct wpa_group *prev = wpa_auth->group;
3948
3949 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
3950 group->vlan_id);
3951
3952 while (prev) {
3953 if (prev->next == group) {
3954 /* This never frees the special first group as needed */
3955 prev->next = group->next;
3956 os_free(group);
3957 break;
3958 }
3959 prev = prev->next;
3960 }
3961
3962}
3963
3964
3965/* Increase the reference counter for group */
3966static void wpa_group_get(struct wpa_authenticator *wpa_auth,
3967 struct wpa_group *group)
3968{
3969 /* Skip the special first group */
3970 if (wpa_auth->group == group)
3971 return;
3972
3973 group->references++;
3974}
3975
3976
3977/* Decrease the reference counter and maybe free the group */
3978static void wpa_group_put(struct wpa_authenticator *wpa_auth,
3979 struct wpa_group *group)
3980{
3981 /* Skip the special first group */
3982 if (wpa_auth->group == group)
3983 return;
3984
3985 group->references--;
3986 if (group->references)
3987 return;
3988 wpa_group_free(wpa_auth, group);
3989}
3990
3991
3992/*
3993 * Add a group that has its references counter set to zero. Caller needs to
3994 * call wpa_group_get() on the return value to mark the entry in use.
3995 */
6fc6879b
JM		 3996static struct wpa_group *
3997wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3998{
3999 struct wpa_group *group;
4000
4001 if (wpa_auth == NULL || wpa_auth->group == NULL)
4002 return NULL;
4003
4004 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4005 vlan_id);
bdffdc5d 4006 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4007 if (group == NULL)
4008 return NULL;
4009
4010 group->next = wpa_auth->group->next;
4011 wpa_auth->group->next = group;
4012
4013 return group;
4014}
4015
4016
7cebc8e2
MB		 4017/*
4018 * Enforce that the group state machine for the VLAN is running, increase
4019 * reference counter as interface is up. References might have been increased
4020 * even if a negative value is returned.
4021 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4022 */
4023int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4024{
4025 struct wpa_group *group;
4026
4027 if (wpa_auth == NULL)
4028 return 0;
4029
4030 group = wpa_auth->group;
4031 while (group) {
4032 if (group->vlan_id == vlan_id)
4033 break;
4034 group = group->next;
4035 }
4036
4037 if (group == NULL) {
4038 group = wpa_auth_add_group(wpa_auth, vlan_id);
4039 if (group == NULL)
4040 return -1;
4041 }
4042
4043 wpa_printf(MSG_DEBUG,
4044 "WPA: Ensure group state machine running for VLAN ID %d",
4045 vlan_id);
4046
4047 wpa_group_get(wpa_auth, group);
4048 group->num_setup_iface++;
4049
4050 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4051 return -1;
4052
4053 return 0;
4054}
4055
4056
4057/*
4058 * Decrease reference counter, expected to be zero afterwards.
4059 * returns: -1 on error (group not found, group in fail state)
4060 * -2 if wpa_group is still referenced
4061 * 0 else
4062 */
4063int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4064{
4065 struct wpa_group *group;
4066 int ret = 0;
4067
4068 if (wpa_auth == NULL)
4069 return 0;
4070
4071 group = wpa_auth->group;
4072 while (group) {
4073 if (group->vlan_id == vlan_id)
4074 break;
4075 group = group->next;
4076 }
4077
4078 if (group == NULL)
4079 return -1;
4080
4081 wpa_printf(MSG_DEBUG,
4082 "WPA: Try stopping group state machine for VLAN ID %d",
4083 vlan_id);
4084
4085 if (group->num_setup_iface <= 0) {
4086 wpa_printf(MSG_ERROR,
4087 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4088 vlan_id);
4089 return -1;
4090 }
4091 group->num_setup_iface--;
4092
4093 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4094 ret = -1;
4095
4096 if (group->references > 1) {
4097 wpa_printf(MSG_DEBUG,
4098 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4099 vlan_id);
4100 ret = -2;
4101 }
4102
4103 wpa_group_put(wpa_auth, group);
4104
4105 return ret;
4106}
4107
4108
6fc6879b
JM		 4109int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4110{
4111 struct wpa_group *group;
4112
4113 if (sm == NULL || sm->wpa_auth == NULL)
4114 return 0;
4115
4116 group = sm->wpa_auth->group;
4117 while (group) {
4118 if (group->vlan_id == vlan_id)
4119 break;
4120 group = group->next;
4121 }
4122
4123 if (group == NULL) {
4124 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4125 if (group == NULL)
4126 return -1;
4127 }
4128
4129 if (sm->group == group)
4130 return 0;
4131
7d7f7be2
JM		 4132 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4133 return -1;
4134
6fc6879b
JM		 4135 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4136 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4137
a0ad9e8c
MB		 4138 wpa_group_get(sm->wpa_auth, group);
4139 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4140 sm->group = group;
a0ad9e8c 4141
6fc6879b
JM		 4142 return 0;
4143}
e4bf4db9
JM		 4144
4145
4146void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4147 struct wpa_state_machine *sm, int ack)
4148{
4149 if (wpa_auth == NULL || sm == NULL)
4150 return;
4151 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4152 " ack=%d", MAC2STR(sm->addr), ack);
4153 if (sm->pending_1_of_4_timeout && ack) {
4154 /*
4155 * Some deployed supplicant implementations update their SNonce
4156 * for each EAPOL-Key 2/4 message even within the same 4-way
4157 * handshake and then fail to use the first SNonce when
4158 * deriving the PTK. This results in unsuccessful 4-way
4159 * handshake whenever the relatively short initial timeout is
4160 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4161 * around this by increasing the timeout now that we know that
4162 * the station has received the frame.
4163 */
4164 int timeout_ms = eapol_key_timeout_subseq;
4165 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4166 "timeout by %u ms because of acknowledged frame",
4167 timeout_ms);
4168 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4169 eloop_register_timeout(timeout_ms / 1000,
4170 (timeout_ms % 1000) * 1000,
4171 wpa_send_eapol_timeout, wpa_auth, sm);
4172 }
4173}
c10347f2
JM		 4174
4175
4176int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4177{
4178 if (sm == NULL)
4179 return 0;
4180 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4181}
aa189ac9
JM		 4182
4183
4184int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4185{
4186 if (sm == NULL)
4187 return 0;
4188 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4189}
25ef8529
JM		 4190
4191
4192#ifdef CONFIG_P2P
4193int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4194{
4195 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4196 return -1;
4197 os_memcpy(addr, sm->ip_addr, 4);
4198 return 0;
4199}
4200#endif /* CONFIG_P2P */
cbc210de
JM		 4201
4202
4203int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4204 struct radius_das_attrs *attr)
4205{
4206 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4207}
34782730
JM		 4208
4209
4210void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4211{
4212 struct wpa_group *group;
4213
4214 if (!wpa_auth)
4215 return;
4216 for (group = wpa_auth->group; group; group = group->next)
4217 wpa_group_config_group_keys(wpa_auth, group);
4218}
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