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FILS: Update PMKID derivation rules for ERP key hierarchy establishment
[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);
567da5bb
JM		 38static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
39 u8 *data, 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);
9392859d
JM		 43static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
44 const struct wpabuf *hlp);
75c8563e 45#endif /* CONFIG_FILS */
6fc6879b
JM		 46static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
47static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
48 struct wpa_group *group);
581a8cde 49static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 50static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
51 struct wpa_group *group);
1bdb7ab3
JM		 52static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
53 struct wpa_group *group);
f23c5b17 54static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 55 const u8 *pmk, unsigned int pmk_len,
56 struct wpa_ptk *ptk);
a0ad9e8c
MB		 57static void wpa_group_free(struct wpa_authenticator *wpa_auth,
58 struct wpa_group *group);
59static void wpa_group_get(struct wpa_authenticator *wpa_auth,
60 struct wpa_group *group);
61static void wpa_group_put(struct wpa_authenticator *wpa_auth,
62 struct wpa_group *group);
e73ffa09 63static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
6fc6879b 64
bae61562
JM		 65static const u32 eapol_key_timeout_first = 100; /* ms */
66static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 67static const u32 eapol_key_timeout_first_group = 500; /* ms */
6fc6879b
JM		 68
69/* TODO: make these configurable */
70static const int dot11RSNAConfigPMKLifetime = 43200;
71static const int dot11RSNAConfigPMKReauthThreshold = 70;
72static const int dot11RSNAConfigSATimeout = 60;
73
74
c772d054 75static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 76 struct wpa_authenticator *wpa_auth, const u8 *addr)
77{
cef8fac0
JB		 78 if (wpa_auth->cb->mic_failure_report)
79 return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
c772d054 80 return 0;
6fc6879b
JM		 81}
82
83
2c502460
JM		 84static inline void wpa_auth_psk_failure_report(
85 struct wpa_authenticator *wpa_auth, const u8 *addr)
86{
cef8fac0
JB		 87 if (wpa_auth->cb->psk_failure_report)
88 wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
2c502460
JM		 89}
90
91
6fc6879b
JM		 92static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
93 const u8 *addr, wpa_eapol_variable var,
94 int value)
95{
cef8fac0
JB		 96 if (wpa_auth->cb->set_eapol)
97 wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
6fc6879b
JM		 98}
99
100
101static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
102 const u8 *addr, wpa_eapol_variable var)
103{
cef8fac0 104 if (wpa_auth->cb->get_eapol == NULL)
6fc6879b 105 return -1;
cef8fac0 106 return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
6fc6879b
JM		 107}
108
109
110static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 111 const u8 *addr,
112 const u8 *p2p_dev_addr,
113 const u8 *prev_psk)
6fc6879b 114{
cef8fac0 115 if (wpa_auth->cb->get_psk == NULL)
6fc6879b 116 return NULL;
cef8fac0
JB		 117 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
118 prev_psk);
6fc6879b
JM		 119}
120
121
122static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
123 const u8 *addr, u8 *msk, size_t *len)
124{
cef8fac0 125 if (wpa_auth->cb->get_msk == NULL)
6fc6879b 126 return -1;
cef8fac0 127 return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
6fc6879b
JM		 128}
129
130
131static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
132 int vlan_id,
71934751 133 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 134 u8 *key, size_t key_len)
135{
cef8fac0 136 if (wpa_auth->cb->set_key == NULL)
6fc6879b 137 return -1;
cef8fac0
JB		 138 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
139 key, key_len);
6fc6879b
JM		 140}
141
142
143static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
144 const u8 *addr, int idx, u8 *seq)
145{
cef8fac0 146 if (wpa_auth->cb->get_seqnum == NULL)
6fc6879b 147 return -1;
cef8fac0 148 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
6fc6879b
JM		 149}
150
151
6fc6879b
JM		 152static inline int
153wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
154 const u8 *data, size_t data_len, int encrypt)
155{
cef8fac0 156 if (wpa_auth->cb->send_eapol == NULL)
6fc6879b 157 return -1;
cef8fac0
JB		 158 return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
159 encrypt);
6fc6879b
JM		 160}
161
162
c50d94f1
BC		 163#ifdef CONFIG_MESH
164static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
165 const u8 *addr)
166{
cef8fac0 167 if (wpa_auth->cb->start_ampe == NULL)
c50d94f1 168 return -1;
cef8fac0 169 return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
c50d94f1
BC		 170}
171#endif /* CONFIG_MESH */
172
173
6fc6879b
JM		 174int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
175 int (*cb)(struct wpa_state_machine *sm, void *ctx),
176 void *cb_ctx)
177{
cef8fac0 178 if (wpa_auth->cb->for_each_sta == NULL)
6fc6879b 179 return 0;
cef8fac0 180 return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
6fc6879b
JM		 181}
182
183
bf98f7f3
JM		 184int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
185 int (*cb)(struct wpa_authenticator *a, void *ctx),
186 void *cb_ctx)
187{
cef8fac0 188 if (wpa_auth->cb->for_each_auth == NULL)
bf98f7f3 189 return 0;
cef8fac0 190 return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
bf98f7f3
JM		 191}
192
193
6fc6879b
JM		 194void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
195 logger_level level, const char *txt)
196{
cef8fac0 197 if (wpa_auth->cb->logger == NULL)
6fc6879b 198 return;
cef8fac0 199 wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
6fc6879b
JM		 200}
201
202
203void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
204 logger_level level, const char *fmt, ...)
205{
206 char *format;
207 int maxlen;
208 va_list ap;
209
cef8fac0 210 if (wpa_auth->cb->logger == NULL)
6fc6879b
JM		 211 return;
212
213 maxlen = os_strlen(fmt) + 100;
214 format = os_malloc(maxlen);
215 if (!format)
216 return;
217
218 va_start(ap, fmt);
219 vsnprintf(format, maxlen, fmt, ap);
220 va_end(ap);
221
222 wpa_auth_logger(wpa_auth, addr, level, format);
223
224 os_free(format);
225}
226
227
228static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
567da5bb 229 const u8 *addr, u16 reason)
6fc6879b 230{
cef8fac0 231 if (wpa_auth->cb->disconnect == NULL)
6fc6879b 232 return;
567da5bb
JM		 233 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)",
234 MAC2STR(addr), reason);
235 wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason);
6fc6879b
JM		 236}
237
238
239static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
240{
56586197 241 int ret = 0;
4ec1fd8e 242#ifdef CONFIG_IEEE80211R_AP
56586197
JM		 243 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
244 ret = 1;
4ec1fd8e 245#endif /* CONFIG_IEEE80211R_AP */
56586197
JM		 246#ifdef CONFIG_IEEE80211W
247 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
248 ret = 1;
249#endif /* CONFIG_IEEE80211W */
a14896e8
JM		 250 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
251 ret = 1;
56586197 252 return ret;
6fc6879b
JM		 253}
254
255
256static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
257{
258 struct wpa_authenticator *wpa_auth = eloop_ctx;
259
3642c431 260 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 261 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
262 "initialization.");
263 } else {
264 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 265 wpa_hexdump_key(MSG_DEBUG, "GMK",
266 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 267 }
268
269 if (wpa_auth->conf.wpa_gmk_rekey) {
270 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
271 wpa_rekey_gmk, wpa_auth, NULL);
272 }
273}
274
275
276static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
277{
278 struct wpa_authenticator *wpa_auth = eloop_ctx;
a0ad9e8c 279 struct wpa_group *group, *next;
6fc6879b
JM		 280
281 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
a0ad9e8c
MB		 282 group = wpa_auth->group;
283 while (group) {
284 wpa_group_get(wpa_auth, group);
285
6fc6879b
JM		 286 group->GTKReKey = TRUE;
287 do {
288 group->changed = FALSE;
289 wpa_group_sm_step(wpa_auth, group);
290 } while (group->changed);
a0ad9e8c
MB		 291
292 next = group->next;
293 wpa_group_put(wpa_auth, group);
294 group = next;
6fc6879b
JM		 295 }
296
297 if (wpa_auth->conf.wpa_group_rekey) {
298 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
299 0, wpa_rekey_gtk, wpa_auth, NULL);
300 }
301}
302
303
581a8cde
JM		 304static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
305{
306 struct wpa_authenticator *wpa_auth = eloop_ctx;
307 struct wpa_state_machine *sm = timeout_ctx;
308
309 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
310 wpa_request_new_ptk(sm);
311 wpa_sm_step(sm);
312}
313
314
6fc6879b
JM		 315static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
316{
317 if (sm->pmksa == ctx)
318 sm->pmksa = NULL;
319 return 0;
320}
321
322
323static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
324 void *ctx)
325{
326 struct wpa_authenticator *wpa_auth = ctx;
327 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
328}
329
330
1bdb7ab3
JM		 331static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
332 struct wpa_group *group)
333{
559cdabb 334 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 335 u8 rkey[32];
559cdabb 336 unsigned long ptr;
1bdb7ab3 337
3642c431 338 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 339 return -1;
340 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
341
342 /*
343 * Counter = PRF-256(Random number, "Init Counter",
344 * Local MAC Address || Time)
345 */
346 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
347 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 348 ptr = (unsigned long) group;
349 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
3642c431 350 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 351 return -1;
352
353 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
354 group->Counter, WPA_NONCE_LEN) < 0)
355 return -1;
356 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
357 group->Counter, WPA_NONCE_LEN);
358
359 return 0;
360}
361
362
e6965d4e 363static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 364 int vlan_id, int delay_init)
e6965d4e
JM		 365{
366 struct wpa_group *group;
e6965d4e
JM		 367
368 group = os_zalloc(sizeof(struct wpa_group));
369 if (group == NULL)
370 return NULL;
371
372 group->GTKAuthenticator = TRUE;
373 group->vlan_id = vlan_id;
c3550295 374 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 375
08704cd8
JM		 376 if (random_pool_ready() != 1) {
377 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
378 "for secure operations - update keys later when "
379 "the first station connects");
380 }
381
1bdb7ab3
JM		 382 /*
383 * Set initial GMK/Counter value here. The actual values that will be
384 * used in negotiations will be set once the first station tries to
385 * connect. This allows more time for collecting additional randomness
386 * on embedded devices.
6fc6879b 387 */
1bdb7ab3 388 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 389 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
390 "initialization.");
391 os_free(group);
392 return NULL;
393 }
6fc6879b
JM		 394
395 group->GInit = TRUE;
bdffdc5d
JM		 396 if (delay_init) {
397 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
398 "until Beacon frames have been configured");
399 /* Initialization is completed in wpa_init_keys(). */
400 } else {
401 wpa_group_sm_step(wpa_auth, group);
402 group->GInit = FALSE;
403 wpa_group_sm_step(wpa_auth, group);
404 }
6fc6879b
JM		 405
406 return group;
407}
408
409
410/**
411 * wpa_init - Initialize WPA authenticator
412 * @addr: Authenticator address
413 * @conf: Configuration for WPA authenticator
a17df5fb 414 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 415 * Returns: Pointer to WPA authenticator data or %NULL on failure
416 */
417struct wpa_authenticator * wpa_init(const u8 *addr,
418 struct wpa_auth_config *conf,
cef8fac0
JB		 419 const struct wpa_auth_callbacks *cb,
420 void *cb_ctx)
6fc6879b
JM		 421{
422 struct wpa_authenticator *wpa_auth;
423
424 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
425 if (wpa_auth == NULL)
426 return NULL;
427 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
428 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
cef8fac0
JB		 429 wpa_auth->cb = cb;
430 wpa_auth->cb_ctx = cb_ctx;
6fc6879b
JM		 431
432 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
433 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
434 os_free(wpa_auth);
435 return NULL;
436 }
437
bdffdc5d 438 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 439 if (wpa_auth->group == NULL) {
440 os_free(wpa_auth->wpa_ie);
441 os_free(wpa_auth);
442 return NULL;
443 }
444
4bb081f1
JM		 445 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
446 wpa_auth);
6fc6879b
JM		 447 if (wpa_auth->pmksa == NULL) {
448 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 449 os_free(wpa_auth->group);
6fc6879b
JM		 450 os_free(wpa_auth->wpa_ie);
451 os_free(wpa_auth);
452 return NULL;
453 }
454
4ec1fd8e 455#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 456 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
457 if (wpa_auth->ft_pmk_cache == NULL) {
458 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 459 os_free(wpa_auth->group);
6fc6879b 460 os_free(wpa_auth->wpa_ie);
4bb081f1 461 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 462 os_free(wpa_auth);
463 return NULL;
464 }
4ec1fd8e 465#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 466
467 if (wpa_auth->conf.wpa_gmk_rekey) {
468 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
469 wpa_rekey_gmk, wpa_auth, NULL);
470 }
471
472 if (wpa_auth->conf.wpa_group_rekey) {
473 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
474 wpa_rekey_gtk, wpa_auth, NULL);
475 }
476
25ef8529
JM		 477#ifdef CONFIG_P2P
478 if (WPA_GET_BE32(conf->ip_addr_start)) {
479 int count = WPA_GET_BE32(conf->ip_addr_end) -
480 WPA_GET_BE32(conf->ip_addr_start) + 1;
481 if (count > 1000)
482 count = 1000;
483 if (count > 0)
484 wpa_auth->ip_pool = bitfield_alloc(count);
485 }
486#endif /* CONFIG_P2P */
487
6fc6879b
JM		 488 return wpa_auth;
489}
490
491
bdffdc5d
JM		 492int wpa_init_keys(struct wpa_authenticator *wpa_auth)
493{
494 struct wpa_group *group = wpa_auth->group;
495
496 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
497 "keys");
498 wpa_group_sm_step(wpa_auth, group);
499 group->GInit = FALSE;
500 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 501 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
502 return -1;
bdffdc5d
JM		 503 return 0;
504}
505
506
6fc6879b
JM		 507/**
508 * wpa_deinit - Deinitialize WPA authenticator
509 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
510 */
511void wpa_deinit(struct wpa_authenticator *wpa_auth)
512{
513 struct wpa_group *group, *prev;
514
515 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
516 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
517
4bb081f1 518 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b 519
4ec1fd8e 520#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 521 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
522 wpa_auth->ft_pmk_cache = NULL;
eefe8630 523 wpa_ft_deinit(wpa_auth);
4ec1fd8e 524#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 525
25ef8529
JM		 526#ifdef CONFIG_P2P
527 bitfield_free(wpa_auth->ip_pool);
528#endif /* CONFIG_P2P */
529
530
6fc6879b
JM		 531 os_free(wpa_auth->wpa_ie);
532
533 group = wpa_auth->group;
534 while (group) {
535 prev = group;
536 group = group->next;
537 os_free(prev);
538 }
539
540 os_free(wpa_auth);
541}
542
543
544/**
545 * wpa_reconfig - Update WPA authenticator configuration
546 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
547 * @conf: Configuration for WPA authenticator
548 */
549int wpa_reconfig(struct wpa_authenticator *wpa_auth,
550 struct wpa_auth_config *conf)
551{
e6965d4e 552 struct wpa_group *group;
6fc6879b
JM		 553 if (wpa_auth == NULL)
554 return 0;
555
556 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 557 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
558 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
559 return -1;
560 }
561
e6965d4e
JM		 562 /*
563 * Reinitialize GTK to make sure it is suitable for the new
564 * configuration.
565 */
566 group = wpa_auth->group;
c3550295 567 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 568 group->GInit = TRUE;
569 wpa_group_sm_step(wpa_auth, group);
570 group->GInit = FALSE;
571 wpa_group_sm_step(wpa_auth, group);
572
6fc6879b
JM		 573 return 0;
574}
575
576
577struct wpa_state_machine *
94ddef3e
JM		 578wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
579 const u8 *p2p_dev_addr)
6fc6879b
JM		 580{
581 struct wpa_state_machine *sm;
582
7d7f7be2
JM		 583 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
584 return NULL;
585
6fc6879b
JM		 586 sm = os_zalloc(sizeof(struct wpa_state_machine));
587 if (sm == NULL)
588 return NULL;
589 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 590 if (p2p_dev_addr)
591 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 592
593 sm->wpa_auth = wpa_auth;
594 sm->group = wpa_auth->group;
a0ad9e8c 595 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 596
597 return sm;
598}
599
600
6f9b5d16
JM		 601int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
602 struct wpa_state_machine *sm)
6fc6879b
JM		 603{
604 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 605 return -1;
6fc6879b 606
4ec1fd8e 607#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 608 if (sm->ft_completed) {
609 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
610 "FT authentication already completed - do not "
611 "start 4-way handshake");
3d4d2348
JM		 612 /* Go to PTKINITDONE state to allow GTK rekeying */
613 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 614 sm->Pair = TRUE;
6f9b5d16 615 return 0;
6fc6879b 616 }
4ec1fd8e 617#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 618
07e0117d
JM		 619#ifdef CONFIG_FILS
620 if (sm->fils_completed) {
621 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
622 "FILS authentication already completed - do not start 4-way handshake");
623 /* Go to PTKINITDONE state to allow GTK rekeying */
624 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 625 sm->Pair = TRUE;
07e0117d
JM		 626 return 0;
627 }
628#endif /* CONFIG_FILS */
629
6fc6879b 630 if (sm->started) {
22a299ee 631 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 632 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 633 return wpa_sm_step(sm);
6fc6879b
JM		 634 }
635
636 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
637 "start authentication");
638 sm->started = 1;
639
640 sm->Init = TRUE;
e4a6ea1d 641 if (wpa_sm_step(sm) == 1)
6f9b5d16 642 return 1; /* should not really happen */
6fc6879b
JM		 643 sm->Init = FALSE;
644 sm->AuthenticationRequest = TRUE;
6f9b5d16 645 return wpa_sm_step(sm);
6fc6879b
JM		 646}
647
648
a8d05fca
JM		 649void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
650{
651 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
652 * reassociates back to the same AP while the previous entry for the
653 * STA has not yet been removed. */
654 if (sm == NULL)
655 return;
656
657 sm->wpa_key_mgmt = 0;
658}
659
660
6fc6879b
JM		 661static void wpa_free_sta_sm(struct wpa_state_machine *sm)
662{
25ef8529
JM		 663#ifdef CONFIG_P2P
664 if (WPA_GET_BE32(sm->ip_addr)) {
665 u32 start;
666 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
667 "address %u.%u.%u.%u from " MACSTR,
668 sm->ip_addr[0], sm->ip_addr[1],
669 sm->ip_addr[2], sm->ip_addr[3],
670 MAC2STR(sm->addr));
671 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
672 bitfield_clear(sm->wpa_auth->ip_pool,
673 WPA_GET_BE32(sm->ip_addr) - start);
674 }
675#endif /* CONFIG_P2P */
2ade8ef2
JM		 676 if (sm->GUpdateStationKeys) {
677 sm->group->GKeyDoneStations--;
678 sm->GUpdateStationKeys = FALSE;
679 }
4ec1fd8e 680#ifdef CONFIG_IEEE80211R_AP
0f857f43 681 os_free(sm->assoc_resp_ftie);
692ec305 682 wpabuf_free(sm->ft_pending_req_ies);
4ec1fd8e 683#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 684 os_free(sm->last_rx_eapol_key);
685 os_free(sm->wpa_ie);
a0ad9e8c 686 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b
JM		 687 os_free(sm);
688}
689
690
691void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
692{
693 if (sm == NULL)
694 return;
695
696 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
697 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
698 "strict rekeying - force GTK rekey since STA "
699 "is leaving");
700 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
701 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
702 NULL);
703 }
704
705 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 706 sm->pending_1_of_4_timeout = 0;
6fc6879b 707 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 708 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3a46cf93
MB		 709#ifdef CONFIG_IEEE80211R_AP
710 wpa_ft_sta_deinit(sm);
711#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 712 if (sm->in_step_loop) {
713 /* Must not free state machine while wpa_sm_step() is running.
714 * Freeing will be completed in the end of wpa_sm_step(). */
715 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
716 "machine deinit for " MACSTR, MAC2STR(sm->addr));
717 sm->pending_deinit = 1;
718 } else
719 wpa_free_sta_sm(sm);
720}
721
722
723static void wpa_request_new_ptk(struct wpa_state_machine *sm)
724{
725 if (sm == NULL)
726 return;
727
728 sm->PTKRequest = TRUE;
729 sm->PTK_valid = 0;
730}
731
732
68921e24 733static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 734 const u8 *replay_counter)
735{
736 int i;
737 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 738 if (!ctr[i].valid)
22a299ee 739 break;
68921e24 740 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 741 WPA_REPLAY_COUNTER_LEN) == 0)
742 return 1;
743 }
744 return 0;
745}
746
747
68921e24
JM		 748static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
749 const u8 *replay_counter)
750{
751 int i;
752 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
753 if (ctr[i].valid &&
754 (replay_counter == NULL ||
755 os_memcmp(replay_counter, ctr[i].counter,
756 WPA_REPLAY_COUNTER_LEN) == 0))
757 ctr[i].valid = FALSE;
758 }
759}
760
761
4ec1fd8e 762#ifdef CONFIG_IEEE80211R_AP
0f857f43
JM		 763static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
764 struct wpa_state_machine *sm,
765 struct wpa_eapol_ie_parse *kde)
766{
767 struct wpa_ie_data ie;
768 struct rsn_mdie *mdie;
769
770 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
771 ie.num_pmkid != 1 || ie.pmkid == NULL) {
772 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
773 "FT 4-way handshake message 2/4");
774 return -1;
775 }
776
777 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
778 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
779 sm->sup_pmk_r1_name, PMKID_LEN);
780
781 if (!kde->mdie || !kde->ftie) {
782 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
783 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
784 return -1;
785 }
786
787 mdie = (struct rsn_mdie *) (kde->mdie + 2);
788 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
789 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
790 MOBILITY_DOMAIN_ID_LEN) != 0) {
791 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
792 return -1;
793 }
794
795 if (sm->assoc_resp_ftie &&
796 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
797 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
798 2 + sm->assoc_resp_ftie[1]) != 0)) {
799 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
800 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
801 kde->ftie, kde->ftie_len);
802 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
803 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
804 return -1;
805 }
806
807 return 0;
808}
4ec1fd8e 809#endif /* CONFIG_IEEE80211R_AP */
0f857f43
JM		 810
811
c772d054
JM		 812static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
813 struct wpa_state_machine *sm, int group)
ec027805
JM		 814{
815 /* Supplicant reported a Michael MIC error */
816 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
817 "received EAPOL-Key Error Request "
818 "(STA detected Michael MIC failure (group=%d))",
819 group);
fbc72d32
JM		 820
821 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
822 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
823 "ignore Michael MIC failure report since "
824 "group cipher is not TKIP");
825 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
826 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
827 "ignore Michael MIC failure report since "
828 "pairwise cipher is not TKIP");
829 } else {
c772d054
JM		 830 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
831 return 1; /* STA entry was removed */
fbc72d32
JM		 832 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
833 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
834 }
ec027805
JM		 835
836 /*
837 * Error report is not a request for a new key handshake, but since
838 * Authenticator may do it, let's change the keys now anyway.
839 */
840 wpa_request_new_ptk(sm);
c772d054 841 return 0;
ec027805
JM		 842}
843
844
f23c5b17
JM		 845static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
846 size_t data_len)
847{
848 struct wpa_ptk PTK;
849 int ok = 0;
850 const u8 *pmk = NULL;
207976f0 851 unsigned int pmk_len;
f23c5b17 852
b729fd8d 853 os_memset(&PTK, 0, sizeof(PTK));
f23c5b17 854 for (;;) {
e61fea6b
JM		 855 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
856 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
f23c5b17
JM		 857 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
858 sm->p2p_dev_addr, pmk);
859 if (pmk == NULL)
860 break;
207976f0
JM		 861 pmk_len = PMK_LEN;
862 } else {
f23c5b17 863 pmk = sm->PMK;
207976f0
JM		 864 pmk_len = sm->pmk_len;
865 }
f23c5b17 866
364c064a
JM		 867 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
868 break;
f23c5b17 869
567da5bb
JM		 870 if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
871 data, data_len) == 0) {
f23c5b17
JM		 872 ok = 1;
873 break;
874 }
875
876 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
877 break;
878 }
879
880 if (!ok) {
881 wpa_printf(MSG_DEBUG,
882 "WPA: Earlier SNonce did not result in matching MIC");
883 return -1;
884 }
885
886 wpa_printf(MSG_DEBUG,
887 "WPA: Earlier SNonce resulted in matching MIC");
888 sm->alt_snonce_valid = 0;
889 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
890 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
891 sm->PTK_valid = TRUE;
892
893 return 0;
894}
895
896
6fc6879b
JM		 897void wpa_receive(struct wpa_authenticator *wpa_auth,
898 struct wpa_state_machine *sm,
899 u8 *data, size_t data_len)
900{
901 struct ieee802_1x_hdr *hdr;
902 struct wpa_eapol_key *key;
903 u16 key_info, key_data_length;
904 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
905 SMK_M1, SMK_M3, SMK_ERROR } msg;
906 char *msgtxt;
907 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 908 const u8 *key_data;
909 size_t keyhdrlen, mic_len;
6d014ffc 910 u8 *mic;
6fc6879b
JM		 911
912 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
913 return;
dc5bad48 914 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 915
567da5bb 916 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 917 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 918
dc5bad48
JM		 919 if (data_len < sizeof(*hdr) + keyhdrlen) {
920 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 921 return;
dc5bad48 922 }
6fc6879b
JM		 923
924 hdr = (struct ieee802_1x_hdr *) data;
925 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 926 mic = (u8 *) (key + 1);
6fc6879b 927 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 928 key_data = mic + mic_len + 2;
929 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 930 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 931 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
932 MAC2STR(sm->addr), key_info, key->type,
933 (unsigned int) mic_len, key_data_length);
934 wpa_hexdump(MSG_MSGDUMP,
935 "WPA: EAPOL-Key header (ending before Key MIC)",
936 key, sizeof(*key));
937 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
938 mic, mic_len);
5e3b5197 939 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 940 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
941 "key_data overflow (%d > %lu)",
942 key_data_length,
943 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 944 keyhdrlen));
6fc6879b
JM		 945 return;
946 }
947
f8e96eb6 948 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 949 if (key->type == EAPOL_KEY_TYPE_WPA) {
950 /*
951 * Some deployed station implementations seem to send
952 * msg 4/4 with incorrect type value in WPA2 mode.
953 */
954 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
955 "with unexpected WPA type in RSN mode");
956 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 957 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
958 "unexpected type %d in RSN mode",
959 key->type);
960 return;
961 }
962 } else {
963 if (key->type != EAPOL_KEY_TYPE_WPA) {
964 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
965 "unexpected type %d in WPA mode",
966 key->type);
967 return;
968 }
969 }
970
bc8318ac
JM		 971 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
972 WPA_NONCE_LEN);
973 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
974 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
975
6fc6879b
JM		 976 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
977 * are set */
978
979 if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
980 (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
981 if (key_info & WPA_KEY_INFO_ERROR) {
982 msg = SMK_ERROR;
983 msgtxt = "SMK Error";
984 } else {
985 msg = SMK_M1;
986 msgtxt = "SMK M1";
987 }
988 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
989 msg = SMK_M3;
990 msgtxt = "SMK M3";
991 } else if (key_info & WPA_KEY_INFO_REQUEST) {
992 msg = REQUEST;
993 msgtxt = "Request";
994 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
995 msg = GROUP_2;
996 msgtxt = "2/2 Group";
3b5b7aa8
JM		 997 } else if (key_data_length == 0 ||
998 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
999 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 1000 msg = PAIRWISE_4;
1001 msgtxt = "4/4 Pairwise";
1002 } else {
1003 msg = PAIRWISE_2;
1004 msgtxt = "2/4 Pairwise";
1005 }
1006
1007 /* TODO: key_info type validation for PeerKey */
1008 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1009 msg == GROUP_2) {
1010 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 1011 if (sm->pairwise == WPA_CIPHER_CCMP ||
1012 sm->pairwise == WPA_CIPHER_GCMP) {
6fc6879b 1013 if (wpa_use_aes_cmac(sm) &&
a14896e8 1014 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
929a2ea5 1015 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
b9866483 1016 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1017 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1018 wpa_auth_logger(wpa_auth, sm->addr,
1019 LOGGER_WARNING,
1020 "advertised support for "
1021 "AES-128-CMAC, but did not "
1022 "use it");
1023 return;
1024 }
1025
1026 if (!wpa_use_aes_cmac(sm) &&
2449791b 1027 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
07a5fe82 1028 sm->wpa_key_mgmt != WPA_KEY_MGMT_OWE &&
567da5bb 1029 sm->wpa_key_mgmt != WPA_KEY_MGMT_DPP &&
6fc6879b
JM		 1030 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1031 wpa_auth_logger(wpa_auth, sm->addr,
1032 LOGGER_WARNING,
1033 "did not use HMAC-SHA1-AES "
eb7719ff 1034 "with CCMP/GCMP");
6fc6879b
JM		 1035 return;
1036 }
1037 }
929a2ea5 1038
2449791b 1039 if ((wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
07a5fe82 1040 wpa_key_mgmt_fils(sm->wpa_key_mgmt) ||
567da5bb 1041 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
07a5fe82 1042 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) &&
929a2ea5
JM		 1043 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1044 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1045 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1046 return;
1047 }
6fc6879b
JM		 1048 }
1049
1050 if (key_info & WPA_KEY_INFO_REQUEST) {
1051 if (sm->req_replay_counter_used &&
1052 os_memcmp(key->replay_counter, sm->req_replay_counter,
1053 WPA_REPLAY_COUNTER_LEN) <= 0) {
1054 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1055 "received EAPOL-Key request with "
1056 "replayed counter");
1057 return;
1058 }
1059 }
1060
1061 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1062 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1063 int i;
68921e24
JM		 1064
1065 if (msg == PAIRWISE_2 &&
1066 wpa_replay_counter_valid(sm->prev_key_replay,
1067 key->replay_counter) &&
1068 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1069 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1070 {
1071 /*
1072 * Some supplicant implementations (e.g., Windows XP
1073 * WZC) update SNonce for each EAPOL-Key 2/4. This
1074 * breaks the workaround on accepting any of the
1075 * pending requests, so allow the SNonce to be updated
1076 * even if we have already sent out EAPOL-Key 3/4.
1077 */
1078 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1079 "Process SNonce update from STA "
1080 "based on retransmitted EAPOL-Key "
1081 "1/4");
1082 sm->update_snonce = 1;
f23c5b17
JM		 1083 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1084 sm->alt_snonce_valid = TRUE;
1085 os_memcpy(sm->alt_replay_counter,
1086 sm->key_replay[0].counter,
1087 WPA_REPLAY_COUNTER_LEN);
1088 goto continue_processing;
1089 }
1090
1091 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1092 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1093 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1094 WPA_REPLAY_COUNTER_LEN) == 0) {
1095 /*
1096 * Supplicant may still be using the old SNonce since
1097 * there was two EAPOL-Key 2/4 messages and they had
1098 * different SNonce values.
1099 */
1100 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1101 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1102 goto continue_processing;
1103 }
1104
1105 if (msg == PAIRWISE_2 &&
1106 wpa_replay_counter_valid(sm->prev_key_replay,
1107 key->replay_counter) &&
1108 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1109 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1110 "ignore retransmitted EAPOL-Key %s - "
1111 "SNonce did not change", msgtxt);
1112 } else {
1113 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1114 "received EAPOL-Key %s with "
1115 "unexpected replay counter", msgtxt);
1116 }
22a299ee
JM		 1117 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1118 if (!sm->key_replay[i].valid)
1119 break;
1120 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1121 sm->key_replay[i].counter,
1122 WPA_REPLAY_COUNTER_LEN);
1123 }
6fc6879b
JM		 1124 wpa_hexdump(MSG_DEBUG, "received replay counter",
1125 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1126 return;
1127 }
1128
68921e24 1129continue_processing:
3b5b7aa8
JM		 1130#ifdef CONFIG_FILS
1131 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1132 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1133 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1134 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1135 return;
1136 }
1137#endif /* CONFIG_FILS */
1138
6fc6879b
JM		 1139 switch (msg) {
1140 case PAIRWISE_2:
1141 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1142 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1143 (!sm->update_snonce ||
1144 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1145 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1146 "received EAPOL-Key msg 2/4 in "
1147 "invalid state (%d) - dropped",
1148 sm->wpa_ptk_state);
1149 return;
1150 }
bbb921da 1151 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1152 if (sm->group->reject_4way_hs_for_entropy) {
1153 /*
1154 * The system did not have enough entropy to generate
1155 * strong random numbers. Reject the first 4-way
1156 * handshake(s) and collect some entropy based on the
1157 * information from it. Once enough entropy is
1158 * available, the next atempt will trigger GMK/Key
1159 * Counter update and the station will be allowed to
1160 * continue.
1161 */
1162 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1163 "collect more entropy for random number "
1164 "generation");
08704cd8 1165 random_mark_pool_ready();
567da5bb
JM		 1166 wpa_sta_disconnect(wpa_auth, sm->addr,
1167 WLAN_REASON_PREV_AUTH_NOT_VALID);
08704cd8
JM		 1168 return;
1169 }
6fc6879b
JM		 1170 break;
1171 case PAIRWISE_4:
1172 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1173 !sm->PTK_valid) {
1174 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1175 "received EAPOL-Key msg 4/4 in "
1176 "invalid state (%d) - dropped",
1177 sm->wpa_ptk_state);
1178 return;
1179 }
1180 break;
1181 case GROUP_2:
1182 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1183 || !sm->PTK_valid) {
1184 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1185 "received EAPOL-Key msg 2/2 in "
1186 "invalid state (%d) - dropped",
1187 sm->wpa_ptk_group_state);
1188 return;
1189 }
1190 break;
1191#ifdef CONFIG_PEERKEY
1192 case SMK_M1:
1193 case SMK_M3:
1194 case SMK_ERROR:
1195 if (!wpa_auth->conf.peerkey) {
1196 wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1197 "PeerKey use disabled - ignoring message");
1198 return;
1199 }
1200 if (!sm->PTK_valid) {
1201 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1202 "received EAPOL-Key msg SMK in "
1203 "invalid state - dropped");
1204 return;
1205 }
1206 break;
1207#else /* CONFIG_PEERKEY */
1208 case SMK_M1:
1209 case SMK_M3:
1210 case SMK_ERROR:
1211 return; /* STSL disabled - ignore SMK messages */
1212#endif /* CONFIG_PEERKEY */
1213 case REQUEST:
1214 break;
1215 }
1216
1217 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1218 "received EAPOL-Key frame (%s)", msgtxt);
1219
1220 if (key_info & WPA_KEY_INFO_ACK) {
1221 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1222 "received invalid EAPOL-Key: Key Ack set");
1223 return;
1224 }
1225
b9866483
JM		 1226 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1227 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1228 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1229 "received invalid EAPOL-Key: Key MIC not set");
1230 return;
1231 }
1232
b9866483
JM		 1233#ifdef CONFIG_FILS
1234 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1235 (key_info & WPA_KEY_INFO_MIC)) {
1236 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1237 "received invalid EAPOL-Key: Key MIC set");
1238 return;
1239 }
1240#endif /* CONFIG_FILS */
1241
6fc6879b 1242 sm->MICVerified = FALSE;
68921e24 1243 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8 1244 if (mic_len &&
567da5bb
JM		 1245 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1246 data, data_len) &&
f23c5b17
JM		 1247 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1248 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1249 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1250 "received EAPOL-Key with invalid MIC");
1251 return;
1252 }
75c8563e
JM		 1253#ifdef CONFIG_FILS
1254 if (!mic_len &&
1255 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1256 &key_data_length) < 0) {
1257 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1258 "received EAPOL-Key with invalid MIC");
1259 return;
1260 }
1261#endif /* CONFIG_FILS */
6fc6879b
JM		 1262 sm->MICVerified = TRUE;
1263 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1264 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1265 }
1266
1267 if (key_info & WPA_KEY_INFO_REQUEST) {
1268 if (sm->MICVerified) {
1269 sm->req_replay_counter_used = 1;
1270 os_memcpy(sm->req_replay_counter, key->replay_counter,
1271 WPA_REPLAY_COUNTER_LEN);
1272 } else {
1273 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1274 "received EAPOL-Key request with "
1275 "invalid MIC");
1276 return;
1277 }
1278
1279 /*
1280 * TODO: should decrypt key data field if encryption was used;
1281 * even though MAC address KDE is not normally encrypted,
1282 * supplicant is allowed to encrypt it.
1283 */
1284 if (msg == SMK_ERROR) {
1285#ifdef CONFIG_PEERKEY
5e3b5197 1286 wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
6fc6879b
JM		 1287#endif /* CONFIG_PEERKEY */
1288 return;
1289 } else if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1290 if (wpa_receive_error_report(
1291 wpa_auth, sm,
1292 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1293 return; /* STA entry was removed */
6fc6879b
JM		 1294 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1295 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1296 "received EAPOL-Key Request for new "
1297 "4-Way Handshake");
1298 wpa_request_new_ptk(sm);
1299#ifdef CONFIG_PEERKEY
1300 } else if (msg == SMK_M1) {
5e3b5197 1301 wpa_smk_m1(wpa_auth, sm, key, key_data,
5c6787a6 1302 key_data_length);
6fc6879b
JM		 1303#endif /* CONFIG_PEERKEY */
1304 } else if (key_data_length > 0 &&
5e3b5197
JM		 1305 wpa_parse_kde_ies(key_data, key_data_length,
1306 &kde) == 0 &&
6fc6879b
JM		 1307 kde.mac_addr) {
1308 } else {
1309 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1310 "received EAPOL-Key Request for GTK "
1311 "rekeying");
6fc6879b
JM		 1312 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1313 wpa_rekey_gtk(wpa_auth, NULL);
1314 }
1315 } else {
68921e24
JM		 1316 /* Do not allow the same key replay counter to be reused. */
1317 wpa_replay_counter_mark_invalid(sm->key_replay,
1318 key->replay_counter);
1319
1320 if (msg == PAIRWISE_2) {
1321 /*
1322 * Maintain a copy of the pending EAPOL-Key frames in
1323 * case the EAPOL-Key frame was retransmitted. This is
1324 * needed to allow EAPOL-Key msg 2/4 reply to another
1325 * pending msg 1/4 to update the SNonce to work around
1326 * unexpected supplicant behavior.
1327 */
1328 os_memcpy(sm->prev_key_replay, sm->key_replay,
1329 sizeof(sm->key_replay));
1330 } else {
1331 os_memset(sm->prev_key_replay, 0,
1332 sizeof(sm->prev_key_replay));
1333 }
1334
1335 /*
1336 * Make sure old valid counters are not accepted anymore and
1337 * do not get copied again.
1338 */
1339 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1340 }
1341
1342#ifdef CONFIG_PEERKEY
1343 if (msg == SMK_M3) {
5e3b5197 1344 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
6fc6879b
JM		 1345 return;
1346 }
1347#endif /* CONFIG_PEERKEY */
1348
1349 os_free(sm->last_rx_eapol_key);
a1f11e34 1350 sm->last_rx_eapol_key = os_memdup(data, data_len);
6fc6879b
JM		 1351 if (sm->last_rx_eapol_key == NULL)
1352 return;
6fc6879b
JM		 1353 sm->last_rx_eapol_key_len = data_len;
1354
0d442aff 1355 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1356 sm->EAPOLKeyReceived = TRUE;
1357 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1358 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1359 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1360 wpa_sm_step(sm);
1361}
1362
1363
3c7302c2
JM		 1364static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1365 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1366{
5cb9d5c3
JM		 1367 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1368 u8 *pos;
3c7302c2 1369 int ret = 0;
6fc6879b 1370
5cb9d5c3
JM		 1371 /* GTK = PRF-X(GMK, "Group key expansion",
1372 * AA || GNonce || Time || random data)
1373 * The example described in the IEEE 802.11 standard uses only AA and
1374 * GNonce as inputs here. Add some more entropy since this derivation
1375 * is done only at the Authenticator and as such, does not need to be
1376 * exactly same.
1377 */
6fc6879b
JM		 1378 os_memcpy(data, addr, ETH_ALEN);
1379 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1380 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1381 wpa_get_ntp_timestamp(pos);
1382 pos += 8;
3642c431 1383 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1384 ret = -1;
6fc6879b 1385
56586197 1386#ifdef CONFIG_IEEE80211W
5cb9d5c3 1387 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1388#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1389 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1390 < 0)
1391 ret = -1;
56586197 1392#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1393
1394 return ret;
6fc6879b
JM		 1395}
1396
1397
1398static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1399{
1400 struct wpa_authenticator *wpa_auth = eloop_ctx;
1401 struct wpa_state_machine *sm = timeout_ctx;
1402
e4bf4db9 1403 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1404 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1405 sm->TimeoutEvt = TRUE;
1406 wpa_sm_step(sm);
1407}
1408
1409
1410void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1411 struct wpa_state_machine *sm, int key_info,
1412 const u8 *key_rsc, const u8 *nonce,
1413 const u8 *kde, size_t kde_len,
1414 int keyidx, int encr, int force_version)
1415{
1416 struct ieee802_1x_hdr *hdr;
1417 struct wpa_eapol_key *key;
5e3b5197 1418 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1419 int alg;
1420 int key_data_len, pad_len = 0;
1421 u8 *buf, *pos;
1422 int version, pairwise;
22a299ee 1423 int i;
6d014ffc 1424 u8 *key_mic, *key_data;
6fc6879b 1425
567da5bb 1426 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 1427 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1428
1429 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1430
1431 if (force_version)
1432 version = force_version;
929a2ea5 1433 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
07a5fe82 1434 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
567da5bb 1435 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
36a50fd4
JM		 1436 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1437 wpa_key_mgmt_fils(sm->wpa_key_mgmt))
a14896e8 1438 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
6fc6879b
JM		 1439 else if (wpa_use_aes_cmac(sm))
1440 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1441 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1442 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1443 else
1444 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1445
8543ed8a 1446 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1447
1448 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1449 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1450 "encr=%d)",
1451 version,
1452 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1453 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1454 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1455 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1456 pairwise, (unsigned long) kde_len, keyidx, encr);
1457
1458 key_data_len = kde_len;
1459
1460 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
07a5fe82 1461 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
567da5bb 1462 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a14896e8 1463 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1464 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1465 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1466 pad_len = key_data_len % 8;
1467 if (pad_len)
1468 pad_len = 8 - pad_len;
1469 key_data_len += pad_len + 8;
1470 }
1471
1472 len += key_data_len;
b729fd8d
JM		 1473 if (!mic_len && encr)
1474 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1475
1476 hdr = os_zalloc(len);
1477 if (hdr == NULL)
1478 return;
1479 hdr->version = wpa_auth->conf.eapol_version;
1480 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1481 hdr->length = host_to_be16(len - sizeof(*hdr));
1482 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1483 key_mic = (u8 *) (key + 1);
5e3b5197 1484 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1485
1486 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1487 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1488 key_info |= version;
1489 if (encr && sm->wpa == WPA_VERSION_WPA2)
1490 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1491 if (sm->wpa != WPA_VERSION_WPA2)
1492 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1493 WPA_PUT_BE16(key->key_info, key_info);
1494
1495 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
caab23f1
JM		 1496 if ((key_info & WPA_KEY_INFO_SMK_MESSAGE) ||
1497 (sm->wpa == WPA_VERSION_WPA2 && !pairwise))
6fc6879b 1498 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1499 else
1500 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b
JM		 1501
1502 /* FIX: STSL: what to use as key_replay_counter? */
22a299ee
JM		 1503 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1504 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1505 os_memcpy(sm->key_replay[i].counter,
1506 sm->key_replay[i - 1].counter,
1507 WPA_REPLAY_COUNTER_LEN);
1508 }
1509 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1510 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1511 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1512 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1513 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1514 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1515
1516 if (nonce)
1517 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1518
1519 if (key_rsc)
1520 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1521
1522 if (kde && !encr) {
5e3b5197 1523 os_memcpy(key_data, kde, kde_len);
6d014ffc 1524 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d
JM		 1525#ifdef CONFIG_FILS
1526 } else if (!mic_len) {
1527 const u8 *aad[1];
1528 size_t aad_len[1];
1529
1530 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1531 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1532 kde, kde_len);
1533
1534 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1535 sm->PTK.kek, sm->PTK.kek_len);
1536 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1537 * to Key Data (exclusive). */
1538 aad[0] = (u8 *) hdr;
1539 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1540 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1541 1, aad, aad_len, key_mic + 2) < 0) {
1542 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1543 return;
1544 }
1545
1546 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1547 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1548#endif /* CONFIG_FILS */
6fc6879b
JM		 1549 } else if (encr && kde) {
1550 buf = os_zalloc(key_data_len);
1551 if (buf == NULL) {
1552 os_free(hdr);
1553 return;
1554 }
1555 pos = buf;
1556 os_memcpy(pos, kde, kde_len);
1557 pos += kde_len;
1558
1559 if (pad_len)
1560 *pos++ = 0xdd;
1561
1562 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1563 buf, key_data_len);
1564 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
07a5fe82 1565 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
567da5bb 1566 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a14896e8 1567 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1568 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b 1569 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
ef9627cb
JM		 1570 wpa_printf(MSG_DEBUG,
1571 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1572 (unsigned int) sm->PTK.kek_len);
98cd3d1c 1573 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1574 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1575 os_free(hdr);
1576 os_free(buf);
1577 return;
1578 }
6d014ffc 1579 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1580#ifndef CONFIG_NO_RC4
98cd3d1c 1581 } else if (sm->PTK.kek_len == 16) {
6fc6879b 1582 u8 ek[32];
ef9627cb
JM		 1583
1584 wpa_printf(MSG_DEBUG,
1585 "WPA: Encrypt Key Data using RC4");
6fc6879b
JM		 1586 os_memcpy(key->key_iv,
1587 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1588 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1589 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1590 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1591 os_memcpy(key_data, buf, key_data_len);
1592 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1593 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1594#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1595 } else {
1596 os_free(hdr);
1597 os_free(buf);
1598 return;
6fc6879b
JM		 1599 }
1600 os_free(buf);
1601 }
1602
1603 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1604 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1605 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1606 "PTK not valid when sending EAPOL-Key "
1607 "frame");
1608 os_free(hdr);
1609 return;
1610 }
5e3b5197 1611
98cd3d1c
JM		 1612 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1613 sm->wpa_key_mgmt, version,
5e3b5197 1614 (u8 *) hdr, len, key_mic);
7af092a0
JB		 1615#ifdef CONFIG_TESTING_OPTIONS
1616 if (!pairwise &&
06df2aa6 1617 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1618 drand48() <
1619 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1620 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1621 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1622 key_mic[0]++;
7af092a0
JB		 1623 }
1624#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1625 }
1626
1627 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1628 1);
1629 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1630 sm->pairwise_set);
1631 os_free(hdr);
1632}
1633
1634
1635static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1636 struct wpa_state_machine *sm, int key_info,
1637 const u8 *key_rsc, const u8 *nonce,
1638 const u8 *kde, size_t kde_len,
1639 int keyidx, int encr)
1640{
1641 int timeout_ms;
1642 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1643 u32 ctr;
6fc6879b
JM		 1644
1645 if (sm == NULL)
1646 return;
1647
1648 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1649 keyidx, encr, 0);
1650
bae61562 1651 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1652 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1653 timeout_ms = pairwise ? eapol_key_timeout_first :
1654 eapol_key_timeout_first_group;
bae61562
JM		 1655 else
1656 timeout_ms = eapol_key_timeout_subseq;
e4bf4db9
JM		 1657 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1658 sm->pending_1_of_4_timeout = 1;
1659 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1660 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1661 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1662 wpa_send_eapol_timeout, wpa_auth, sm);
1663}
1664
1665
567da5bb
JM		 1666static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1667 u8 *data, size_t data_len)
6fc6879b
JM		 1668{
1669 struct ieee802_1x_hdr *hdr;
1670 struct wpa_eapol_key *key;
1671 u16 key_info;
1672 int ret = 0;
6d014ffc 1673 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
567da5bb 1674 size_t mic_len = wpa_mic_len(akmp, pmk_len);
6fc6879b
JM		 1675
1676 if (data_len < sizeof(*hdr) + sizeof(*key))
1677 return -1;
1678
1679 hdr = (struct ieee802_1x_hdr *) data;
1680 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1681 mic_pos = (u8 *) (key + 1);
6fc6879b 1682 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1683 os_memcpy(mic, mic_pos, mic_len);
1684 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1685 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1686 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1687 data, data_len, mic_pos) ||
1688 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1689 ret = -1;
6d014ffc 1690 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1691 return ret;
1692}
1693
1694
1695void wpa_remove_ptk(struct wpa_state_machine *sm)
1696{
1697 sm->PTK_valid = FALSE;
1698 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1699 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1700 0))
1701 wpa_printf(MSG_DEBUG,
1702 "RSN: PTK removal from the driver failed");
6fc6879b 1703 sm->pairwise_set = FALSE;
581a8cde 1704 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1705}
1706
1707
bb119228 1708int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1709{
5d22a1d5
JM		 1710 int remove_ptk = 1;
1711
6fc6879b 1712 if (sm == NULL)
6f9b5d16 1713 return -1;
6fc6879b
JM		 1714
1715 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1716 "event %d notification", event);
1717
1718 switch (event) {
1719 case WPA_AUTH:
c50d94f1
BC		 1720#ifdef CONFIG_MESH
1721 /* PTKs are derived through AMPE */
1722 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1723 /* not mesh */
1724 break;
1725 }
1726 return 0;
1727#endif /* CONFIG_MESH */
6fc6879b
JM		 1728 case WPA_ASSOC:
1729 break;
1730 case WPA_DEAUTH:
1731 case WPA_DISASSOC:
1732 sm->DeauthenticationRequest = TRUE;
1733 break;
1734 case WPA_REAUTH:
1735 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1736 if (!sm->started) {
1737 /*
1738 * When using WPS, we may end up here if the STA
1739 * manages to re-associate without the previous STA
1740 * entry getting removed. Consequently, we need to make
1741 * sure that the WPA state machines gets initialized
1742 * properly at this point.
1743 */
1744 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1745 "started - initialize now");
1746 sm->started = 1;
1747 sm->Init = TRUE;
1748 if (wpa_sm_step(sm) == 1)
1749 return 1; /* should not really happen */
1750 sm->Init = FALSE;
1751 sm->AuthenticationRequest = TRUE;
1752 break;
1753 }
9663596f
JM		 1754 if (sm->GUpdateStationKeys) {
1755 /*
1756 * Reauthentication cancels the pending group key
1757 * update for this STA.
1758 */
1759 sm->group->GKeyDoneStations--;
1760 sm->GUpdateStationKeys = FALSE;
1761 sm->PtkGroupInit = TRUE;
1762 }
6fc6879b
JM		 1763 sm->ReAuthenticationRequest = TRUE;
1764 break;
1765 case WPA_ASSOC_FT:
4ec1fd8e 1766#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1767 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1768 "after association");
1769 wpa_ft_install_ptk(sm);
1770
6fc6879b
JM		 1771 /* Using FT protocol, not WPA auth state machine */
1772 sm->ft_completed = 1;
6f9b5d16 1773 return 0;
4ec1fd8e 1774#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1775 break;
4ec1fd8e 1776#endif /* CONFIG_IEEE80211R_AP */
957bff83
JM		 1777 case WPA_ASSOC_FILS:
1778#ifdef CONFIG_FILS
1779 wpa_printf(MSG_DEBUG,
1780 "FILS: TK configuration after association");
1781 fils_set_tk(sm);
1782 sm->fils_completed = 1;
1783 return 0;
1784#else /* CONFIG_FILS */
1785 break;
1786#endif /* CONFIG_FILS */
6fc6879b
JM		 1787 }
1788
4ec1fd8e 1789#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1790 sm->ft_completed = 0;
4ec1fd8e 1791#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1792
5d22a1d5
JM		 1793#ifdef CONFIG_IEEE80211W
1794 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1795 remove_ptk = 0;
1796#endif /* CONFIG_IEEE80211W */
78815f3d 1797#ifdef CONFIG_FILS
da24c5aa
JM		 1798 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1799 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1800 remove_ptk = 0;
1801#endif /* CONFIG_FILS */
6fc6879b 1802
5d22a1d5
JM		 1803 if (remove_ptk) {
1804 sm->PTK_valid = FALSE;
1805 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1806
1807 if (event != WPA_REAUTH_EAPOL)
1808 wpa_remove_ptk(sm);
1809 }
6fc6879b 1810
43f49c37
JM		 1811 if (sm->in_step_loop) {
1812 /*
1813 * wpa_sm_step() is already running - avoid recursive call to
1814 * it by making the existing loop process the new update.
1815 */
1816 sm->changed = TRUE;
1817 return 0;
1818 }
6f9b5d16 1819 return wpa_sm_step(sm);
6fc6879b
JM		 1820}
1821
1822
6fc6879b
JM		 1823SM_STATE(WPA_PTK, INITIALIZE)
1824{
1825 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1826 if (sm->Init) {
1827 /* Init flag is not cleared here, so avoid busy
1828 * loop by claiming nothing changed. */
1829 sm->changed = FALSE;
1830 }
1831
1832 sm->keycount = 0;
1833 if (sm->GUpdateStationKeys)
1834 sm->group->GKeyDoneStations--;
1835 sm->GUpdateStationKeys = FALSE;
1836 if (sm->wpa == WPA_VERSION_WPA)
1837 sm->PInitAKeys = FALSE;
1838 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1839 * Local AA > Remote AA)) */) {
1840 sm->Pair = TRUE;
1841 }
1842 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1843 wpa_remove_ptk(sm);
1844 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1845 sm->TimeoutCtr = 0;
a1ea1b45 1846 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 1847 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 1848 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 1849 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1850 WPA_EAPOL_authorized, 0);
1851 }
1852}
1853
1854
1855SM_STATE(WPA_PTK, DISCONNECT)
1856{
567da5bb
JM		 1857 u16 reason = sm->disconnect_reason;
1858
6fc6879b
JM		 1859 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1860 sm->Disconnect = FALSE;
567da5bb
JM		 1861 sm->disconnect_reason = 0;
1862 if (!reason)
1863 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1864 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
6fc6879b
JM		 1865}
1866
1867
1868SM_STATE(WPA_PTK, DISCONNECTED)
1869{
1870 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1871 sm->DeauthenticationRequest = FALSE;
1872}
1873
1874
1875SM_STATE(WPA_PTK, AUTHENTICATION)
1876{
1877 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1878 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1879 sm->PTK_valid = FALSE;
1880 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1881 1);
1882 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1883 sm->AuthenticationRequest = FALSE;
1884}
1885
1886
40d00d2b
NC		 1887static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1888 struct wpa_group *group)
1bdb7ab3 1889{
40d00d2b
NC		 1890 if (group->first_sta_seen)
1891 return;
1bdb7ab3
JM		 1892 /*
1893 * System has run bit further than at the time hostapd was started
1894 * potentially very early during boot up. This provides better chances
1895 * of collecting more randomness on embedded systems. Re-initialize the
1896 * GMK and Counter here to improve their strength if there was not
1897 * enough entropy available immediately after system startup.
1898 */
1899 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1900 "station");
08704cd8
JM		 1901 if (random_pool_ready() != 1) {
1902 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1903 "to proceed - reject first 4-way handshake");
1904 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1905 } else {
1906 group->first_sta_seen = TRUE;
1907 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1908 }
40d00d2b 1909
aac1efec
JM		 1910 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1911 wpa_gtk_update(wpa_auth, group) < 0 ||
1912 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1913 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1914 group->first_sta_seen = FALSE;
1915 group->reject_4way_hs_for_entropy = TRUE;
1916 }
1bdb7ab3
JM		 1917}
1918
1919
6fc6879b
JM		 1920SM_STATE(WPA_PTK, AUTHENTICATION2)
1921{
1922 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1923
40d00d2b 1924 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1925 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1926
3825a19b
JM		 1927 /*
1928 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1929 * ambiguous. The Authenticator state machine uses a counter that is
1930 * incremented by one for each 4-way handshake. However, the security
1931 * analysis of 4-way handshake points out that unpredictable nonces
1932 * help in preventing precomputation attacks. Instead of the state
1933 * machine definition, use an unpredictable nonce value here to provide
1934 * stronger protection against potential precomputation attacks.
1935 */
1936 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1937 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1938 "ANonce.");
65a32cdb 1939 sm->Disconnect = TRUE;
3825a19b
JM		 1940 return;
1941 }
bc8318ac
JM		 1942 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1943 WPA_NONCE_LEN);
6fc6879b
JM		 1944 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1945 * logical place than INITIALIZE since AUTHENTICATION2 can be
1946 * re-entered on ReAuthenticationRequest without going through
1947 * INITIALIZE. */
1948 sm->TimeoutCtr = 0;
1949}
1950
1951
1952SM_STATE(WPA_PTK, INITPMK)
1953{
1954 u8 msk[2 * PMK_LEN];
1955 size_t len = 2 * PMK_LEN;
1956
1957 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1958#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1959 sm->xxkey_len = 0;
4ec1fd8e 1960#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1961 if (sm->pmksa) {
1962 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1963 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1964 sm->pmk_len = sm->pmksa->pmk_len;
567da5bb
JM		 1965#ifdef CONFIG_DPP
1966 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
1967 wpa_printf(MSG_DEBUG,
1968 "DPP: No PMKSA cache entry for STA - reject connection");
1969 sm->Disconnect = TRUE;
1970 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
1971 return;
1972#endif /* CONFIG_DPP */
6fc6879b 1973 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1974 unsigned int pmk_len;
1975
834c5d68 1976 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
207976f0
JM		 1977 pmk_len = PMK_LEN_SUITE_B_192;
1978 else
1979 pmk_len = PMK_LEN;
6fc6879b 1980 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1981 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1982 pmk_len);
1983 if (len < pmk_len) {
1984 wpa_printf(MSG_DEBUG,
1985 "WPA: MSK not long enough (%u) to create PMK (%u)",
1986 (unsigned int) len, (unsigned int) pmk_len);
1987 sm->Disconnect = TRUE;
1988 return;
1989 }
1990 os_memcpy(sm->PMK, msk, pmk_len);
1991 sm->pmk_len = pmk_len;
4ec1fd8e 1992#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 1993 if (len >= 2 * PMK_LEN) {
1994 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1995 sm->xxkey_len = PMK_LEN;
1996 }
4ec1fd8e 1997#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1998 } else {
400de9b1 1999 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 2000 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 2001 sm->Disconnect = TRUE;
2002 return;
6fc6879b 2003 }
40aaa64f 2004 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 2005
2006 sm->req_replay_counter_used = 0;
2007 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
2008 * will break reauthentication since EAPOL state machines may not be
2009 * get into AUTHENTICATING state that clears keyRun before WPA state
2010 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
2011 * state and takes PMK from the previously used AAA Key. This will
2012 * eventually fail in 4-Way Handshake because Supplicant uses PMK
2013 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
2014 * be good workaround for this issue. */
2015 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
2016}
2017
2018
2019SM_STATE(WPA_PTK, INITPSK)
2020{
2021 const u8 *psk;
2022 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
759fd76b 2023 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
6fc6879b
JM		 2024 if (psk) {
2025 os_memcpy(sm->PMK, psk, PMK_LEN);
207976f0 2026 sm->pmk_len = PMK_LEN;
4ec1fd8e 2027#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 2028 os_memcpy(sm->xxkey, psk, PMK_LEN);
2029 sm->xxkey_len = PMK_LEN;
4ec1fd8e 2030#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2031 }
e61fea6b
JM		 2032#ifdef CONFIG_SAE
2033 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2034 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2035 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2036 sm->pmk_len = sm->pmksa->pmk_len;
2037 }
2038#endif /* CONFIG_SAE */
6fc6879b
JM		 2039 sm->req_replay_counter_used = 0;
2040}
2041
2042
2043SM_STATE(WPA_PTK, PTKSTART)
2044{
2045 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2046 size_t pmkid_len = 0;
2047
2048 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2049 sm->PTKRequest = FALSE;
2050 sm->TimeoutEvt = FALSE;
f23c5b17 2051 sm->alt_snonce_valid = FALSE;
bae61562
JM		 2052
2053 sm->TimeoutCtr++;
41f140d3 2054 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2055 /* No point in sending the EAPOL-Key - we will disconnect
2056 * immediately following this. */
2057 return;
2058 }
2059
6fc6879b
JM		 2060 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2061 "sending 1/4 msg of 4-Way Handshake");
2062 /*
2063 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
2064 * one possible PSK for this STA.
2065 */
2066 if (sm->wpa == WPA_VERSION_WPA2 &&
e61fea6b
JM		 2067 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
2068 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
a14896e8 2069 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2070 pmkid = buf;
2071 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2072 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2073 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2074 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2075 if (sm->pmksa) {
6fc6879b
JM		 2076 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2077 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2078 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2079 /* No KCK available to derive PMKID */
2080 pmkid = NULL;
2081 } else {
6fc6879b
JM		 2082 /*
2083 * Calculate PMKID since no PMKSA cache entry was
2084 * available with pre-calculated PMKID.
2085 */
207976f0 2086 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197 2087 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
41b81914 2088 sm->wpa_key_mgmt);
6fc6879b
JM		 2089 }
2090 }
2091 wpa_send_eapol(sm->wpa_auth, sm,
2092 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2093 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2094}
2095
2096
f23c5b17 2097static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2098 const u8 *pmk, unsigned int pmk_len,
2099 struct wpa_ptk *ptk)
6fc6879b 2100{
4ec1fd8e 2101#ifdef CONFIG_IEEE80211R_AP
56586197 2102 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
98cd3d1c 2103 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
4ec1fd8e 2104#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2105
207976f0 2106 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c
JM		 2107 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2108 ptk, sm->wpa_key_mgmt, sm->pairwise);
6fc6879b
JM		 2109}
2110
2111
3b5b7aa8 2112#ifdef CONFIG_FILS
c4fd6d8a
JM		 2113
2114int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
80ddf5d9
JM		 2115 size_t pmk_len, const u8 *snonce, const u8 *anonce,
2116 struct wpabuf *g_sta, struct wpabuf *g_ap)
c4fd6d8a
JM		 2117{
2118 u8 ick[FILS_ICK_MAX_LEN];
2119 size_t ick_len;
2120 int res;
8fed47e0
JM		 2121 u8 fils_ft[FILS_FT_MAX_LEN];
2122 size_t fils_ft_len = 0;
c4fd6d8a
JM		 2123
2124 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
2125 snonce, anonce, &sm->PTK, ick, &ick_len,
8fed47e0
JM		 2126 sm->wpa_key_mgmt, sm->pairwise,
2127 fils_ft, &fils_ft_len);
c4fd6d8a
JM		 2128 if (res < 0)
2129 return res;
2130 sm->PTK_valid = TRUE;
2131
8fed47e0
JM		 2132#ifdef CONFIG_IEEE80211R_AP
2133 if (fils_ft_len) {
2134 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2135 struct wpa_auth_config *conf = &wpa_auth->conf;
2136 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
2137
2138 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2139 conf->ssid, conf->ssid_len,
2140 conf->mobility_domain,
2141 conf->r0_key_holder,
2142 conf->r0_key_holder_len,
2143 sm->addr, pmk_r0, pmk_r0_name) < 0)
2144 return -1;
2145
2146 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", pmk_r0, PMK_LEN);
2147 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2148 pmk_r0_name, WPA_PMK_NAME_LEN);
2149 wpa_ft_store_pmk_r0(wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
2150 sm->pairwise);
2151 os_memset(fils_ft, 0, sizeof(fils_ft));
2152 }
2153#endif /* CONFIG_IEEE80211R_AP */
2154
c4fd6d8a
JM		 2155 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2156 sm->addr, sm->wpa_auth->addr,
80ddf5d9
JM		 2157 g_sta ? wpabuf_head(g_sta) : NULL,
2158 g_sta ? wpabuf_len(g_sta) : 0,
2159 g_ap ? wpabuf_head(g_ap) : NULL,
2160 g_ap ? wpabuf_len(g_ap) : 0,
c4fd6d8a
JM		 2161 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2162 sm->fils_key_auth_ap,
2163 &sm->fils_key_auth_len);
2164 os_memset(ick, 0, sizeof(ick));
78815f3d
JM		 2165
2166 /* Store nonces for (Re)Association Request/Response frame processing */
2167 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2168 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2169
c4fd6d8a
JM		 2170 return res;
2171}
2172
2173
3b5b7aa8 2174static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2175 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2176{
2177 struct ieee802_1x_hdr *hdr;
2178 struct wpa_eapol_key *key;
2179 u8 *pos;
2180 u16 key_data_len;
2181 u8 *tmp;
2182 const u8 *aad[1];
2183 size_t aad_len[1];
2184
75c8563e 2185 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2186 key = (struct wpa_eapol_key *) (hdr + 1);
2187 pos = (u8 *) (key + 1);
2188 key_data_len = WPA_GET_BE16(pos);
2189 if (key_data_len < AES_BLOCK_SIZE ||
2190 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2191 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2192 "No room for AES-SIV data in the frame");
2193 return -1;
2194 }
2195 pos += 2; /* Pointing at the Encrypted Key Data field */
2196
2197 tmp = os_malloc(key_data_len);
2198 if (!tmp)
2199 return -1;
2200
2201 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2202 * to Key Data (exclusive). */
75c8563e
JM		 2203 aad[0] = buf;
2204 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2205 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2206 1, aad, aad_len, tmp) < 0) {
2207 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2208 "Invalid AES-SIV data in the frame");
2209 bin_clear_free(tmp, key_data_len);
2210 return -1;
2211 }
2212
2213 /* AEAD decryption and validation completed successfully */
2214 key_data_len -= AES_BLOCK_SIZE;
2215 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2216 tmp, key_data_len);
2217
2218 /* Replace Key Data field with the decrypted version */
2219 os_memcpy(pos, tmp, key_data_len);
2220 pos -= 2; /* Key Data Length field */
2221 WPA_PUT_BE16(pos, key_data_len);
2222 bin_clear_free(tmp, key_data_len);
2223 if (_key_data_len)
2224 *_key_data_len = key_data_len;
2225 return 0;
2226}
78815f3d
JM		 2227
2228
087631b9
JM		 2229const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2230 const u8 *ies, size_t ies_len,
2231 const u8 *fils_session)
2232{
2233 const u8 *ie, *end;
2234 const u8 *session = NULL;
2235
2236 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2237 wpa_printf(MSG_DEBUG,
2238 "FILS: Not a FILS AKM - reject association");
2239 return NULL;
2240 }
2241
2242 /* Verify Session element */
2243 ie = ies;
2244 end = ((const u8 *) ie) + ies_len;
2245 while (ie + 1 < end) {
2246 if (ie + 2 + ie[1] > end)
2247 break;
2248 if (ie[0] == WLAN_EID_EXTENSION &&
2249 ie[1] >= 1 + FILS_SESSION_LEN &&
2250 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2251 session = ie;
2252 break;
2253 }
2254 ie += 2 + ie[1];
2255 }
2256
2257 if (!session) {
2258 wpa_printf(MSG_DEBUG,
2259 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2260 __func__);
2261 return NULL;
2262 }
2263
2264 if (!fils_session) {
2265 wpa_printf(MSG_DEBUG,
2266 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2267 __func__);
2268 return NULL;
2269 }
2270
2271 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2272 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2273 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2274 fils_session, FILS_SESSION_LEN);
2275 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2276 session + 3, FILS_SESSION_LEN);
2277 return NULL;
2278 }
2279 return session;
2280}
2281
2282
bd599353
JM		 2283int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2284 size_t ies_len)
2285{
2286 struct ieee802_11_elems elems;
2287
2288 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2289 wpa_printf(MSG_DEBUG,
2290 "FILS: Failed to parse decrypted elements");
2291 return -1;
2292 }
2293
8b5ddda5
JM		 2294 if (!elems.fils_session) {
2295 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2296 return -1;
2297 }
2298
bd599353
JM		 2299 if (!elems.fils_key_confirm) {
2300 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2301 return -1;
2302 }
2303
2304 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2305 wpa_printf(MSG_DEBUG,
2306 "FILS: Unexpected Key-Auth length %d (expected %d)",
2307 elems.fils_key_confirm_len,
2308 (int) sm->fils_key_auth_len);
2309 return -1;
2310 }
2311
2312 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2313 sm->fils_key_auth_len) != 0) {
2314 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2315 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2316 elems.fils_key_confirm, elems.fils_key_confirm_len);
2317 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2318 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2319 return -1;
2320 }
2321
2322 return 0;
2323}
2324
2325
78815f3d
JM		 2326int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2327 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2328 u8 *pos, size_t left)
2329{
2330 u16 fc, stype;
2331 const u8 *end, *ie_start, *ie, *session, *crypt;
78815f3d
JM		 2332 const u8 *aad[5];
2333 size_t aad_len[5];
2334
2335 if (!sm || !sm->PTK_valid) {
2336 wpa_printf(MSG_DEBUG,
2337 "FILS: No KEK to decrypt Assocication Request frame");
2338 return -1;
2339 }
2340
2341 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2342 wpa_printf(MSG_DEBUG,
2343 "FILS: Not a FILS AKM - reject association");
2344 return -1;
2345 }
2346
2347 end = ((const u8 *) mgmt) + frame_len;
2348 fc = le_to_host16(mgmt->frame_control);
2349 stype = WLAN_FC_GET_STYPE(fc);
2350 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2351 ie_start = mgmt->u.reassoc_req.variable;
2352 else
2353 ie_start = mgmt->u.assoc_req.variable;
2354 ie = ie_start;
2355
2356 /*
2357 * Find FILS Session element which is the last unencrypted element in
2358 * the frame.
2359 */
087631b9
JM		 2360 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2361 fils_session);
78815f3d 2362 if (!session) {
087631b9 2363 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
78815f3d
JM		 2364 return -1;
2365 }
087631b9 2366
78815f3d
JM		 2367 crypt = session + 2 + session[1];
2368
2369 if (end - crypt < AES_BLOCK_SIZE) {
2370 wpa_printf(MSG_DEBUG,
2371 "FILS: Too short frame to include AES-SIV data");
2372 return -1;
2373 }
2374
2375 /* AES-SIV AAD vectors */
2376
2377 /* The STA's MAC address */
2378 aad[0] = mgmt->sa;
2379 aad_len[0] = ETH_ALEN;
2380 /* The AP's BSSID */
2381 aad[1] = mgmt->da;
2382 aad_len[1] = ETH_ALEN;
2383 /* The STA's nonce */
2384 aad[2] = sm->SNonce;
2385 aad_len[2] = FILS_NONCE_LEN;
2386 /* The AP's nonce */
2387 aad[3] = sm->ANonce;
2388 aad_len[3] = FILS_NONCE_LEN;
2389 /*
2390 * The (Re)Association Request frame from the Capability Information
2391 * field to the FILS Session element (both inclusive).
2392 */
2393 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2394 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2395
2396 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2397 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2398 wpa_printf(MSG_DEBUG,
2399 "FILS: Invalid AES-SIV data in the frame");
2400 return -1;
2401 }
2402 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2403 pos, left - AES_BLOCK_SIZE);
2404
bd599353
JM		 2405 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2406 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
78815f3d
JM		 2407 return -1;
2408 }
2409
2410 return left - AES_BLOCK_SIZE;
2411}
2412
e73ffa09
JM		 2413
2414int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2415 size_t current_len, size_t max_len,
2416 const struct wpabuf *hlp)
e73ffa09
JM		 2417{
2418 u8 *end = buf + max_len;
2419 u8 *pos = buf + current_len;
2420 struct ieee80211_mgmt *mgmt;
2421 struct wpabuf *plain;
e73ffa09
JM		 2422 const u8 *aad[5];
2423 size_t aad_len[5];
2424
2425 if (!sm || !sm->PTK_valid)
2426 return -1;
2427
2428 wpa_hexdump(MSG_DEBUG,
2429 "FILS: Association Response frame before FILS processing",
2430 buf, current_len);
2431
2432 mgmt = (struct ieee80211_mgmt *) buf;
2433
2434 /* AES-SIV AAD vectors */
2435
2436 /* The AP's BSSID */
2437 aad[0] = mgmt->sa;
2438 aad_len[0] = ETH_ALEN;
2439 /* The STA's MAC address */
2440 aad[1] = mgmt->da;
2441 aad_len[1] = ETH_ALEN;
2442 /* The AP's nonce */
2443 aad[2] = sm->ANonce;
2444 aad_len[2] = FILS_NONCE_LEN;
2445 /* The STA's nonce */
2446 aad[3] = sm->SNonce;
2447 aad_len[3] = FILS_NONCE_LEN;
2448 /*
2449 * The (Re)Association Response frame from the Capability Information
2450 * field (the same offset in both Association and Reassociation
2451 * Response frames) to the FILS Session element (both inclusive).
2452 */
2453 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2454 aad_len[4] = pos - aad[4];
2455
2456 /* The following elements will be encrypted with AES-SIV */
9392859d
JM		 2457 plain = fils_prepare_plainbuf(sm, hlp);
2458 if (!plain) {
2459 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2460 return -1;
2461 }
2462
2463 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2464 wpa_printf(MSG_DEBUG,
2465 "FILS: Not enough room for FILS elements");
2466 wpabuf_free(plain);
2467 return -1;
2468 }
2469
2470 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2471 plain);
2472
2473 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2474 wpabuf_head(plain), wpabuf_len(plain),
2475 5, aad, aad_len, pos) < 0) {
2476 wpabuf_free(plain);
2477 return -1;
2478 }
2479
2480 wpa_hexdump(MSG_DEBUG,
2481 "FILS: Encrypted Association Response elements",
2482 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2483 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2484 wpabuf_free(plain);
2485
2486 sm->fils_completed = 1;
2487
2488 return current_len;
2489}
2490
2491
2492static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2493 const struct wpabuf *hlp)
2494{
2495 struct wpabuf *plain;
2496 u8 *len, *tmp, *tmp2;
2497 u8 hdr[2];
2498 u8 *gtk, dummy_gtk[32];
2499 size_t gtk_len;
2500 struct wpa_group *gsm;
e73ffa09
JM		 2501
2502 plain = wpabuf_alloc(1000);
2503 if (!plain)
9392859d 2504 return NULL;
e73ffa09
JM		 2505
2506 /* TODO: FILS Public Key */
2507
2508 /* FILS Key Confirmation */
2509 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2510 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2511 /* Element ID Extension */
2512 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2513 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2514
91d91abf
JM		 2515 /* FILS HLP Container */
2516 if (hlp)
2517 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2518
2519 /* TODO: FILS IP Address Assignment */
2520
2521 /* Key Delivery */
2522 gsm = sm->group;
2523 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2524 len = wpabuf_put(plain, 1);
2525 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2526 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2527 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2528 /* GTK KDE */
2529 gtk = gsm->GTK[gsm->GN - 1];
2530 gtk_len = gsm->GTK_len;
2531 if (sm->wpa_auth->conf.disable_gtk) {
2532 /*
2533 * Provide unique random GTK to each STA to prevent use
2534 * of GTK in the BSS.
2535 */
2536 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2537 wpabuf_free(plain);
9392859d 2538 return NULL;
e73ffa09
JM		 2539 }
2540 gtk = dummy_gtk;
2541 }
2542 hdr[0] = gsm->GN & 0x03;
2543 hdr[1] = 0;
2544 tmp = wpabuf_put(plain, 0);
2545 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2546 gtk, gtk_len);
2547 wpabuf_put(plain, tmp2 - tmp);
2548
2549 /* IGTK KDE */
2550 tmp = wpabuf_put(plain, 0);
2551 tmp2 = ieee80211w_kde_add(sm, tmp);
2552 wpabuf_put(plain, tmp2 - tmp);
2553
2554 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
9392859d 2555 return plain;
e73ffa09
JM		 2556}
2557
da24c5aa
JM		 2558
2559int fils_set_tk(struct wpa_state_machine *sm)
2560{
2561 enum wpa_alg alg;
2562 int klen;
2563
2564 if (!sm || !sm->PTK_valid)
2565 return -1;
2566
2567 alg = wpa_cipher_to_alg(sm->pairwise);
2568 klen = wpa_cipher_key_len(sm->pairwise);
2569
2570 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2571 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2572 sm->PTK.tk, klen)) {
2573 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2574 return -1;
2575 }
2576
2577 return 0;
2578}
2579
fa61bff6
JM		 2580
2581u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
8b5ddda5 2582 const u8 *fils_session, struct wpabuf *hlp)
fa61bff6
JM		 2583{
2584 struct wpabuf *plain;
2585 u8 *pos = buf;
2586
2587 /* FILS Session */
2588 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2589 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2590 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2591 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2592 pos += FILS_SESSION_LEN;
2593
8b5ddda5 2594 plain = fils_prepare_plainbuf(sm, hlp);
fa61bff6
JM		 2595 if (!plain) {
2596 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2597 return NULL;
2598 }
2599
2600 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2601 pos += wpabuf_len(plain);
2602
2603 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2604 (unsigned int) wpabuf_len(plain));
2605 wpabuf_free(plain);
2606 sm->fils_completed = 1;
2607 return pos;
2608}
2609
3b5b7aa8
JM		 2610#endif /* CONFIG_FILS */
2611
2612
6fc6879b
JM		 2613SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2614{
3b5b7aa8 2615 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2616 struct wpa_ptk PTK;
2c502460 2617 int ok = 0, psk_found = 0;
6fc6879b 2618 const u8 *pmk = NULL;
207976f0 2619 unsigned int pmk_len;
3b5b7aa8
JM		 2620 int ft;
2621 const u8 *eapol_key_ie, *key_data, *mic;
2622 u16 key_data_length;
2623 size_t mic_len, eapol_key_ie_len;
2624 struct ieee802_1x_hdr *hdr;
2625 struct wpa_eapol_key *key;
2626 struct wpa_eapol_ie_parse kde;
6fc6879b
JM		 2627
2628 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2629 sm->EAPOLKeyReceived = FALSE;
68921e24 2630 sm->update_snonce = FALSE;
b729fd8d 2631 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2632
567da5bb 2633 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3b5b7aa8 2634
6fc6879b
JM		 2635 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2636 * WPA-PSK: iterate through possible PSKs and select the one matching
2637 * the packet */
2638 for (;;) {
e61fea6b
JM		 2639 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2640 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
759fd76b
JM		 2641 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2642 sm->p2p_dev_addr, pmk);
6fc6879b
JM		 2643 if (pmk == NULL)
2644 break;
2c502460 2645 psk_found = 1;
207976f0
JM		 2646 pmk_len = PMK_LEN;
2647 } else {
6fc6879b 2648 pmk = sm->PMK;
207976f0
JM		 2649 pmk_len = sm->pmk_len;
2650 }
6fc6879b 2651
364c064a
JM		 2652 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2653 break;
6fc6879b 2654
3b5b7aa8 2655 if (mic_len &&
567da5bb 2656 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
929a2ea5 2657 sm->last_rx_eapol_key,
6fc6879b
JM		 2658 sm->last_rx_eapol_key_len) == 0) {
2659 ok = 1;
2660 break;
2661 }
2662
3b5b7aa8 2663#ifdef CONFIG_FILS
75c8563e
JM		 2664 if (!mic_len &&
2665 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2666 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2667 ok = 1;
2668 break;
2669 }
2670#endif /* CONFIG_FILS */
2671
56586197 2672 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 2673 break;
2674 }
2675
2676 if (!ok) {
2677 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2678 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2679 if (psk_found)
2680 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2681 return;
2682 }
2683
3b5b7aa8
JM		 2684 /*
2685 * Note: last_rx_eapol_key length fields have already been validated in
2686 * wpa_receive().
2687 */
2688 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2689 key = (struct wpa_eapol_key *) (hdr + 1);
2690 mic = (u8 *) (key + 1);
2691 key_data = mic + mic_len + 2;
2692 key_data_length = WPA_GET_BE16(mic + mic_len);
2693 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2694 sizeof(*key) - mic_len - 2)
2695 return;
2696
2697 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2698 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2699 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2700 return;
2701 }
2702 if (kde.rsn_ie) {
2703 eapol_key_ie = kde.rsn_ie;
2704 eapol_key_ie_len = kde.rsn_ie_len;
2705 } else if (kde.osen) {
2706 eapol_key_ie = kde.osen;
2707 eapol_key_ie_len = kde.osen_len;
2708 } else {
2709 eapol_key_ie = kde.wpa_ie;
2710 eapol_key_ie_len = kde.wpa_ie_len;
2711 }
2712 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2713 if (sm->wpa_ie == NULL ||
2714 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2715 eapol_key_ie, eapol_key_ie_len)) {
2716 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2717 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2718 if (sm->wpa_ie) {
2719 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2720 sm->wpa_ie, sm->wpa_ie_len);
2721 }
2722 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2723 eapol_key_ie, eapol_key_ie_len);
2724 /* MLME-DEAUTHENTICATE.request */
567da5bb
JM		 2725 wpa_sta_disconnect(wpa_auth, sm->addr,
2726 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2727 return;
2728 }
4ec1fd8e 2729#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8 2730 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
567da5bb
JM		 2731 wpa_sta_disconnect(wpa_auth, sm->addr,
2732 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2733 return;
2734 }
4ec1fd8e 2735#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2736#ifdef CONFIG_P2P
2737 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2738 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2739 int idx;
2740 wpa_printf(MSG_DEBUG,
2741 "P2P: IP address requested in EAPOL-Key exchange");
2742 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2743 if (idx >= 0) {
2744 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2745 bitfield_set(wpa_auth->ip_pool, idx);
2746 WPA_PUT_BE32(sm->ip_addr, start + idx);
2747 wpa_printf(MSG_DEBUG,
2748 "P2P: Assigned IP address %u.%u.%u.%u to "
2749 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2750 sm->ip_addr[2], sm->ip_addr[3],
2751 MAC2STR(sm->addr));
2752 }
2753 }
2754#endif /* CONFIG_P2P */
2755
4ec1fd8e 2756#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2757 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2758 /*
2759 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2760 * with the value we derived.
2761 */
870834a1
JM		 2762 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2763 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2764 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2765 "PMKR1Name mismatch in FT 4-way "
2766 "handshake");
2767 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2768 "Supplicant",
2769 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2770 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2771 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2772 return;
2773 }
2774 }
4ec1fd8e 2775#endif /* CONFIG_IEEE80211R_AP */
26e23750 2776
e4bf4db9 2777 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2778 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2779
56586197 2780 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2781 /* PSK may have changed from the previous choice, so update
2782 * state machine data based on whatever PSK was selected here.
2783 */
2784 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2785 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2786 }
2787
2788 sm->MICVerified = TRUE;
2789
2790 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2791 sm->PTK_valid = TRUE;
2792}
2793
2794
2795SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2796{
2797 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2798 sm->TimeoutCtr = 0;
2799}
2800
2801
2802#ifdef CONFIG_IEEE80211W
2803
2804static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2805{
2806 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2807 size_t len;
2808 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2809 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2810 }
2811
2812 return 0;
2813}
2814
2815
2816static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2817{
2818 struct wpa_igtk_kde igtk;
2819 struct wpa_group *gsm = sm->group;
03610ad2 2820 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 2821 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 2822
2823 if (!sm->mgmt_frame_prot)
2824 return pos;
2825
2826 igtk.keyid[0] = gsm->GN_igtk;
2827 igtk.keyid[1] = 0;
7b1080da 2828 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 2829 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 2830 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 2831 else
2832 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 2833 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
83421850
JM		 2834 if (sm->wpa_auth->conf.disable_gtk) {
2835 /*
2836 * Provide unique random IGTK to each STA to prevent use of
2837 * IGTK in the BSS.
2838 */
8dd9f9cd 2839 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 2840 return pos;
2841 }
6fc6879b 2842 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 2843 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2844 NULL, 0);
6fc6879b
JM		 2845
2846 return pos;
2847}
2848
2849#else /* CONFIG_IEEE80211W */
2850
2851static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2852{
2853 return 0;
2854}
2855
2856
2857static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2858{
2859 return pos;
2860}
2861
2862#endif /* CONFIG_IEEE80211W */
2863
2864
2865SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2866{
83421850 2867 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 2868 size_t gtk_len, kde_len;
2869 struct wpa_group *gsm = sm->group;
2870 u8 *wpa_ie;
2871 int wpa_ie_len, secure, keyidx, encr = 0;
2872
2873 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2874 sm->TimeoutEvt = FALSE;
bae61562
JM		 2875
2876 sm->TimeoutCtr++;
41f140d3 2877 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2878 /* No point in sending the EAPOL-Key - we will disconnect
2879 * immediately following this. */
2880 return;
2881 }
2882
86dfabb8
JM		 2883 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2884 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2885 */
2886 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2887 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2888 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2889 wpa_ie = sm->wpa_auth->wpa_ie;
2890 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2891 if (sm->wpa == WPA_VERSION_WPA &&
2892 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2893 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 2894 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 2895 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 2896 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2897 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 2898 wpa_ie_len = wpa_ie[1] + 2;
2899 }
2900 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2901 "sending 3/4 msg of 4-Way Handshake");
2902 if (sm->wpa == WPA_VERSION_WPA2) {
2903 /* WPA2 send GTK in the 4-way handshake */
2904 secure = 1;
2905 gtk = gsm->GTK[gsm->GN - 1];
2906 gtk_len = gsm->GTK_len;
83421850
JM		 2907 if (sm->wpa_auth->conf.disable_gtk) {
2908 /*
2909 * Provide unique random GTK to each STA to prevent use
2910 * of GTK in the BSS.
2911 */
2912 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2913 return;
2914 gtk = dummy_gtk;
2915 }
6fc6879b
JM		 2916 keyidx = gsm->GN;
2917 _rsc = rsc;
2918 encr = 1;
2919 } else {
2920 /* WPA does not include GTK in msg 3/4 */
2921 secure = 0;
2922 gtk = NULL;
2923 gtk_len = 0;
2924 keyidx = 0;
2925 _rsc = NULL;
0d442aff
JM		 2926 if (sm->rx_eapol_key_secure) {
2927 /*
2928 * It looks like Windows 7 supplicant tries to use
2929 * Secure bit in msg 2/4 after having reported Michael
2930 * MIC failure and it then rejects the 4-way handshake
2931 * if msg 3/4 does not set Secure bit. Work around this
2932 * by setting the Secure bit here even in the case of
2933 * WPA if the supplicant used it first.
2934 */
2935 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2936 "STA used Secure bit in WPA msg 2/4 - "
2937 "set Secure for 3/4 as workaround");
0d442aff
JM		 2938 secure = 1;
2939 }
6fc6879b
JM		 2940 }
2941
2942 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2943 if (gtk)
2944 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 2945#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2946 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2947 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2948 kde_len += 300; /* FTIE + 2 * TIE */
2949 }
4ec1fd8e 2950#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 2951#ifdef CONFIG_P2P
2952 if (WPA_GET_BE32(sm->ip_addr) > 0)
2953 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2954#endif /* CONFIG_P2P */
6fc6879b
JM		 2955 kde = os_malloc(kde_len);
2956 if (kde == NULL)
2957 return;
2958
2959 pos = kde;
2960 os_memcpy(pos, wpa_ie, wpa_ie_len);
2961 pos += wpa_ie_len;
4ec1fd8e 2962#ifdef CONFIG_IEEE80211R_AP
26e23750 2963 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 2964 int res;
2965 size_t elen;
2966
2967 elen = pos - kde;
2968 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 2969 if (res < 0) {
2970 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2971 "PMKR1Name into RSN IE in EAPOL-Key data");
2972 os_free(kde);
2973 return;
2974 }
59e78c24
JM		 2975 pos -= wpa_ie_len;
2976 pos += elen;
26e23750 2977 }
4ec1fd8e 2978#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2979 if (gtk) {
2980 u8 hdr[2];
2981 hdr[0] = keyidx & 0x03;
2982 hdr[1] = 0;
2983 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2984 gtk, gtk_len);
2985 }
2986 pos = ieee80211w_kde_add(sm, pos);
2987
4ec1fd8e 2988#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2989 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2990 int res;
2991 struct wpa_auth_config *conf;
2992
2993 conf = &sm->wpa_auth->conf;
9257610a
JM		 2994 if (sm->assoc_resp_ftie &&
2995 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
2996 os_memcpy(pos, sm->assoc_resp_ftie,
2997 2 + sm->assoc_resp_ftie[1]);
2998 res = 2 + sm->assoc_resp_ftie[1];
2999 } else {
3000 res = wpa_write_ftie(conf, conf->r0_key_holder,
3001 conf->r0_key_holder_len,
3002 NULL, NULL, pos,
3003 kde + kde_len - pos,
3004 NULL, 0);
3005 }
86dfabb8
JM		 3006 if (res < 0) {
3007 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3008 "into EAPOL-Key Key Data");
3009 os_free(kde);
3010 return;
3011 }
3012 pos += res;
3013
3014 /* TIE[ReassociationDeadline] (TU) */
3015 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3016 *pos++ = 5;
3017 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3018 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3019 pos += 4;
3020
3021 /* TIE[KeyLifetime] (seconds) */
3022 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3023 *pos++ = 5;
3024 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
3025 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
3026 pos += 4;
3027 }
4ec1fd8e 3028#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3029#ifdef CONFIG_P2P
3030 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3031 u8 addr[3 * 4];
3032 os_memcpy(addr, sm->ip_addr, 4);
3033 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3034 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3035 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3036 addr, sizeof(addr), NULL, 0);
3037 }
3038#endif /* CONFIG_P2P */
86dfabb8 3039
6fc6879b 3040 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3041 (secure ? WPA_KEY_INFO_SECURE : 0) |
567da5bb
JM		 3042 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3043 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3044 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3045 WPA_KEY_INFO_KEY_TYPE,
3046 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3047 os_free(kde);
6fc6879b
JM		 3048}
3049
3050
3051SM_STATE(WPA_PTK, PTKINITDONE)
3052{
3053 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3054 sm->EAPOLKeyReceived = FALSE;
3055 if (sm->Pair) {
c3550295
JM		 3056 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3057 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 3058 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 3059 sm->PTK.tk, klen)) {
567da5bb
JM		 3060 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3061 WLAN_REASON_PREV_AUTH_NOT_VALID);
6fc6879b
JM		 3062 return;
3063 }
3064 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3065 sm->pairwise_set = TRUE;
3066
581a8cde
JM		 3067 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
3068 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3069 eloop_register_timeout(sm->wpa_auth->conf.
3070 wpa_ptk_rekey, 0, wpa_rekey_ptk,
3071 sm->wpa_auth, sm);
3072 }
3073
a1ea1b45 3074 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 3075 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 3076 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 3077 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3078 WPA_EAPOL_authorized, 1);
3079 }
3080 }
3081
3082 if (0 /* IBSS == TRUE */) {
3083 sm->keycount++;
3084 if (sm->keycount == 2) {
3085 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3086 WPA_EAPOL_portValid, 1);
3087 }
3088 } else {
3089 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3090 1);
3091 }
3092 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3093 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3094 if (sm->wpa == WPA_VERSION_WPA)
3095 sm->PInitAKeys = TRUE;
3096 else
3097 sm->has_GTK = TRUE;
3098 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3099 "pairwise key handshake completed (%s)",
3100 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3101
4ec1fd8e 3102#ifdef CONFIG_IEEE80211R_AP
6fc6879b 3103 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 3104#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3105}
3106
3107
3108SM_STEP(WPA_PTK)
3109{
3110 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3111
3112 if (sm->Init)
3113 SM_ENTER(WPA_PTK, INITIALIZE);
3114 else if (sm->Disconnect
1aae01fc
BG		 3115 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3116 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3117 "WPA_PTK: sm->Disconnect");
6fc6879b 3118 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 3119 }
6fc6879b
JM		 3120 else if (sm->DeauthenticationRequest)
3121 SM_ENTER(WPA_PTK, DISCONNECTED);
3122 else if (sm->AuthenticationRequest)
3123 SM_ENTER(WPA_PTK, AUTHENTICATION);
3124 else if (sm->ReAuthenticationRequest)
3125 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3126 else if (sm->PTKRequest)
3127 SM_ENTER(WPA_PTK, PTKSTART);
3128 else switch (sm->wpa_ptk_state) {
3129 case WPA_PTK_INITIALIZE:
3130 break;
3131 case WPA_PTK_DISCONNECT:
3132 SM_ENTER(WPA_PTK, DISCONNECTED);
3133 break;
3134 case WPA_PTK_DISCONNECTED:
3135 SM_ENTER(WPA_PTK, INITIALIZE);
3136 break;
3137 case WPA_PTK_AUTHENTICATION:
3138 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3139 break;
3140 case WPA_PTK_AUTHENTICATION2:
56586197 3141 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 3142 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3143 WPA_EAPOL_keyRun) > 0)
3144 SM_ENTER(WPA_PTK, INITPMK);
a1ea1b45
JM		 3145 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3146 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
6fc6879b
JM		 3147 /* FIX: && 802.1X::keyRun */)
3148 SM_ENTER(WPA_PTK, INITPSK);
567da5bb
JM		 3149 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3150 SM_ENTER(WPA_PTK, INITPMK);
6fc6879b
JM		 3151 break;
3152 case WPA_PTK_INITPMK:
3153 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
567da5bb 3154 WPA_EAPOL_keyAvailable) > 0) {
6fc6879b 3155 SM_ENTER(WPA_PTK, PTKSTART);
567da5bb
JM		 3156#ifdef CONFIG_DPP
3157 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3158 SM_ENTER(WPA_PTK, PTKSTART);
3159#endif /* CONFIG_DPP */
3160 } else {
6fc6879b 3161 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 3162 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3163 "INITPMK - keyAvailable = false");
6fc6879b
JM		 3164 SM_ENTER(WPA_PTK, DISCONNECT);
3165 }
3166 break;
3167 case WPA_PTK_INITPSK:
759fd76b 3168 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
e61fea6b 3169 NULL)) {
6fc6879b 3170 SM_ENTER(WPA_PTK, PTKSTART);
e61fea6b
JM		 3171#ifdef CONFIG_SAE
3172 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3173 SM_ENTER(WPA_PTK, PTKSTART);
3174#endif /* CONFIG_SAE */
3175 } else {
6fc6879b
JM		 3176 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3177 "no PSK configured for the STA");
3178 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3179 SM_ENTER(WPA_PTK, DISCONNECT);
3180 }
3181 break;
3182 case WPA_PTK_PTKSTART:
3183 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3184 sm->EAPOLKeyPairwise)
3185 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3186 else if (sm->TimeoutCtr >
41f140d3 3187 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3188 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3189 wpa_auth_vlogger(
3190 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3191 "PTKSTART: Retry limit %u reached",
3192 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3193 SM_ENTER(WPA_PTK, DISCONNECT);
3194 } else if (sm->TimeoutEvt)
3195 SM_ENTER(WPA_PTK, PTKSTART);
3196 break;
3197 case WPA_PTK_PTKCALCNEGOTIATING:
3198 if (sm->MICVerified)
3199 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3200 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3201 sm->EAPOLKeyPairwise)
3202 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3203 else if (sm->TimeoutEvt)
3204 SM_ENTER(WPA_PTK, PTKSTART);
3205 break;
3206 case WPA_PTK_PTKCALCNEGOTIATING2:
3207 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3208 break;
3209 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3210 if (sm->update_snonce)
3211 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3212 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3213 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3214 SM_ENTER(WPA_PTK, PTKINITDONE);
3215 else if (sm->TimeoutCtr >
41f140d3 3216 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3217 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3218 wpa_auth_vlogger(
3219 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3220 "PTKINITNEGOTIATING: Retry limit %u reached",
3221 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3222 SM_ENTER(WPA_PTK, DISCONNECT);
3223 } else if (sm->TimeoutEvt)
3224 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3225 break;
3226 case WPA_PTK_PTKINITDONE:
3227 break;
3228 }
3229}
3230
3231
3232SM_STATE(WPA_PTK_GROUP, IDLE)
3233{
3234 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3235 if (sm->Init) {
3236 /* Init flag is not cleared here, so avoid busy
3237 * loop by claiming nothing changed. */
3238 sm->changed = FALSE;
3239 }
3240 sm->GTimeoutCtr = 0;
3241}
3242
3243
3244SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3245{
3246 u8 rsc[WPA_KEY_RSC_LEN];
3247 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3248 const u8 *kde;
3249 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3250 size_t kde_len;
83421850 3251 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3252
3253 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3254
3255 sm->GTimeoutCtr++;
41f140d3 3256 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3257 /* No point in sending the EAPOL-Key - we will disconnect
3258 * immediately following this. */
3259 return;
3260 }
3261
6fc6879b
JM		 3262 if (sm->wpa == WPA_VERSION_WPA)
3263 sm->PInitAKeys = FALSE;
3264 sm->TimeoutEvt = FALSE;
3265 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3266 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3267 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3268 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3269 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3270 "sending 1/2 msg of Group Key Handshake");
3271
83421850
JM		 3272 gtk = gsm->GTK[gsm->GN - 1];
3273 if (sm->wpa_auth->conf.disable_gtk) {
3274 /*
3275 * Provide unique random GTK to each STA to prevent use
3276 * of GTK in the BSS.
3277 */
3278 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3279 return;
3280 gtk = dummy_gtk;
3281 }
6fc6879b
JM		 3282 if (sm->wpa == WPA_VERSION_WPA2) {
3283 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3284 ieee80211w_kde_len(sm);
e41e4f9e
JM		 3285 kde_buf = os_malloc(kde_len);
3286 if (kde_buf == NULL)
6fc6879b
JM		 3287 return;
3288
e41e4f9e 3289 kde = pos = kde_buf;
6fc6879b
JM		 3290 hdr[0] = gsm->GN & 0x03;
3291 hdr[1] = 0;
3292 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3293 gtk, gsm->GTK_len);
6fc6879b 3294 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 3295 kde_len = pos - kde;
6fc6879b 3296 } else {
83421850 3297 kde = gtk;
e41e4f9e 3298 kde_len = gsm->GTK_len;
6fc6879b
JM		 3299 }
3300
3301 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3302 WPA_KEY_INFO_SECURE |
567da5bb
JM		 3303 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3304 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3305 WPA_KEY_INFO_ACK |
3306 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3307 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3308
3309 os_free(kde_buf);
6fc6879b
JM		 3310}
3311
3312
3313SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3314{
3315 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3316 sm->EAPOLKeyReceived = FALSE;
3317 if (sm->GUpdateStationKeys)
3318 sm->group->GKeyDoneStations--;
3319 sm->GUpdateStationKeys = FALSE;
3320 sm->GTimeoutCtr = 0;
3321 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3322 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3323 "group key handshake completed (%s)",
3324 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3325 sm->has_GTK = TRUE;
3326}
3327
3328
3329SM_STATE(WPA_PTK_GROUP, KEYERROR)
3330{
3331 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3332 if (sm->GUpdateStationKeys)
3333 sm->group->GKeyDoneStations--;
3334 sm->GUpdateStationKeys = FALSE;
3335 sm->Disconnect = TRUE;
4bb9b674
GK		 3336 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3337 "group key handshake failed (%s) after %u tries",
3338 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3339 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3340}
3341
3342
3343SM_STEP(WPA_PTK_GROUP)
3344{
9663596f 3345 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3346 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3347 sm->PtkGroupInit = FALSE;
3348 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3349 case WPA_PTK_GROUP_IDLE:
3350 if (sm->GUpdateStationKeys ||
3351 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3352 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3353 break;
3354 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3355 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3356 !sm->EAPOLKeyPairwise && sm->MICVerified)
3357 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3358 else if (sm->GTimeoutCtr >
41f140d3 3359 sm->wpa_auth->conf.wpa_group_update_count)
6fc6879b
JM		 3360 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3361 else if (sm->TimeoutEvt)
3362 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3363 break;
3364 case WPA_PTK_GROUP_KEYERROR:
3365 SM_ENTER(WPA_PTK_GROUP, IDLE);
3366 break;
3367 case WPA_PTK_GROUP_REKEYESTABLISHED:
3368 SM_ENTER(WPA_PTK_GROUP, IDLE);
3369 break;
3370 }
3371}
3372
3373
3374static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3375 struct wpa_group *group)
3376{
3377 int ret = 0;
3378
6fc6879b
JM		 3379 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3380 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3381 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3382 wpa_auth->addr, group->GNonce,
3383 group->GTK[group->GN - 1], group->GTK_len) < 0)
3384 ret = -1;
5cb9d5c3
JM		 3385 wpa_hexdump_key(MSG_DEBUG, "GTK",
3386 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 3387
3388#ifdef CONFIG_IEEE80211W
70f8cc8e 3389 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3390 size_t len;
3391 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3392 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3393 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3394 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3395 wpa_auth->addr, group->GNonce,
8dd9f9cd 3396 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3397 ret = -1;
6fc6879b 3398 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3399 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 3400 }
3401#endif /* CONFIG_IEEE80211W */
3402
3403 return ret;
3404}
3405
3406
3407static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3408 struct wpa_group *group)
3409{
3410 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3411 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3412 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3413 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3414
3415 /* GTK[0..N] = 0 */
3416 os_memset(group->GTK, 0, sizeof(group->GTK));
3417 group->GN = 1;
3418 group->GM = 2;
3419#ifdef CONFIG_IEEE80211W
3420 group->GN_igtk = 4;
3421 group->GM_igtk = 5;
3422#endif /* CONFIG_IEEE80211W */
3423 /* GTK[GN] = CalcGTK() */
3424 wpa_gtk_update(wpa_auth, group);
3425}
3426
3427
3428static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3429{
473b6f22
MB		 3430 if (ctx != NULL && ctx != sm->group)
3431 return 0;
3432
6fc6879b
JM		 3433 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3434 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3435 "Not in PTKINITDONE; skip Group Key update");
3c183894 3436 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3437 return 0;
3438 }
9663596f
JM		 3439 if (sm->GUpdateStationKeys) {
3440 /*
3c183894
JM		 3441 * This should not really happen, so add a debug log entry.
3442 * Since we clear the GKeyDoneStations before the loop, the
3443 * station needs to be counted here anyway.
9663596f
JM		 3444 */
3445 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3446 "GUpdateStationKeys was already set when "
3447 "marking station for GTK rekeying");
9663596f 3448 }
3c183894 3449
ad3872a3 3450 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3451 if (sm->is_wnmsleep)
3452 return 0;
d32d94db 3453
3c183894
JM		 3454 sm->group->GKeyDoneStations++;
3455 sm->GUpdateStationKeys = TRUE;
3456
6fc6879b
JM		 3457 wpa_sm_step(sm);
3458 return 0;
3459}
3460
3461
b5bf84ba 3462#ifdef CONFIG_WNM_AP
ad3872a3 3463/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3464void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3465{
629edfef 3466 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3467 return;
3468
3469 wpa_group_update_sta(sm, NULL);
3470}
3471
3472
3473void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3474{
629edfef
JM		 3475 if (sm)
3476 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3477}
3478
3479
3480int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3481{
d32d94db 3482 struct wpa_group *gsm = sm->group;
835822d4 3483 u8 *start = pos;
d32d94db
XC		 3484
3485 /*
835822d4 3486 * GTK subelement:
d32d94db 3487 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3488 * Key[5..32]
d32d94db 3489 */
835822d4
JM		 3490 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3491 *pos++ = 11 + gsm->GTK_len;
d32d94db 3492 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3493 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3494 pos += 2;
3495 *pos++ = gsm->GTK_len;
3496 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3497 return 0;
835822d4
JM		 3498 pos += 8;
3499 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3500 pos += gsm->GTK_len;
d32d94db 3501
835822d4
JM		 3502 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3503 gsm->GN);
3504 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3505 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3506
835822d4 3507 return pos - start;
d32d94db
XC		 3508}
3509
3510
3511#ifdef CONFIG_IEEE80211W
3512int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3513{
d32d94db 3514 struct wpa_group *gsm = sm->group;
835822d4 3515 u8 *start = pos;
8dd9f9cd 3516 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3517
835822d4
JM		 3518 /*
3519 * IGTK subelement:
3520 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3521 */
3522 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3523 *pos++ = 2 + 6 + len;
835822d4
JM		 3524 WPA_PUT_LE16(pos, gsm->GN_igtk);
3525 pos += 2;
3526 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3527 return 0;
835822d4 3528 pos += 6;
d32d94db 3529
8dd9f9cd
JM		 3530 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3531 pos += len;
d32d94db 3532
835822d4
JM		 3533 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3534 gsm->GN_igtk);
3535 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3536 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3537
835822d4 3538 return pos - start;
d32d94db
XC		 3539}
3540#endif /* CONFIG_IEEE80211W */
b5bf84ba 3541#endif /* CONFIG_WNM_AP */
d32d94db
XC		 3542
3543
6fc6879b
JM		 3544static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3545 struct wpa_group *group)
3546{
3547 int tmp;
3548
3549 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3550 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3551 group->changed = TRUE;
3552 group->wpa_group_state = WPA_GROUP_SETKEYS;
3553 group->GTKReKey = FALSE;
3554 tmp = group->GM;
3555 group->GM = group->GN;
3556 group->GN = tmp;
3557#ifdef CONFIG_IEEE80211W
3558 tmp = group->GM_igtk;
3559 group->GM_igtk = group->GN_igtk;
3560 group->GN_igtk = tmp;
3561#endif /* CONFIG_IEEE80211W */
3562 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3563 * counting the STAs that are marked with GUpdateStationKeys instead of
3564 * including all STAs that could be in not-yet-completed state. */
3565 wpa_gtk_update(wpa_auth, group);
3566
3c183894
JM		 3567 if (group->GKeyDoneStations) {
3568 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3569 "GKeyDoneStations=%d when starting new GTK rekey",
3570 group->GKeyDoneStations);
3571 group->GKeyDoneStations = 0;
3572 }
473b6f22 3573 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3574 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3575 group->GKeyDoneStations);
3576}
3577
3578
1bdb7ab3
JM		 3579static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3580 struct wpa_group *group)
6fc6879b 3581{
3c7302c2
JM		 3582 int ret = 0;
3583
3c7302c2 3584 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3585 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3586 broadcast_ether_addr, group->GN,
3587 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3588 ret = -1;
6fc6879b
JM		 3589
3590#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3591 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3592 enum wpa_alg alg;
3593 size_t len;
3594
3595 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3596 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3597
3598 if (ret == 0 &&
3599 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3600 broadcast_ether_addr, group->GN_igtk,
3601 group->IGTK[group->GN_igtk - 4], len) < 0)
3602 ret = -1;
3603 }
6fc6879b 3604#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3605
3606 return ret;
6fc6879b
JM		 3607}
3608
3609
7d7f7be2
JM		 3610static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3611{
3612 if (sm->group == ctx) {
3613 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3614 " for discconnection due to fatal failure",
3615 MAC2STR(sm->addr));
3616 sm->Disconnect = TRUE;
3617 }
3618
3619 return 0;
3620}
3621
3622
3623static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3624 struct wpa_group *group)
3625{
3626 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3627 group->changed = TRUE;
3628 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3629 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3630}
3631
3632
1bdb7ab3
JM		 3633static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3634 struct wpa_group *group)
3635{
3636 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3637 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3638 group->changed = TRUE;
3639 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3640
7d7f7be2
JM		 3641 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3642 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3643 return -1;
7d7f7be2 3644 }
1bdb7ab3
JM		 3645
3646 return 0;
3647}
3648
3649
6fc6879b
JM		 3650static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3651 struct wpa_group *group)
3652{
3653 if (group->GInit) {
3654 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3655 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3656 /* Do not allow group operations */
6fc6879b
JM		 3657 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3658 group->GTKAuthenticator) {
3659 wpa_group_setkeysdone(wpa_auth, group);
3660 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3661 group->GTKReKey) {
3662 wpa_group_setkeys(wpa_auth, group);
3663 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3664 if (group->GKeyDoneStations == 0)
3665 wpa_group_setkeysdone(wpa_auth, group);
3666 else if (group->GTKReKey)
3667 wpa_group_setkeys(wpa_auth, group);
3668 }
3669}
3670
3671
e4a6ea1d 3672static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 3673{
3674 if (sm == NULL)
e4a6ea1d 3675 return 0;
6fc6879b
JM		 3676
3677 if (sm->in_step_loop) {
3678 /* This should not happen, but if it does, make sure we do not
3679 * end up freeing the state machine too early by exiting the
3680 * recursive call. */
3681 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 3682 return 0;
6fc6879b
JM		 3683 }
3684
3685 sm->in_step_loop = 1;
3686 do {
3687 if (sm->pending_deinit)
3688 break;
3689
3690 sm->changed = FALSE;
3691 sm->wpa_auth->group->changed = FALSE;
3692
3693 SM_STEP_RUN(WPA_PTK);
3694 if (sm->pending_deinit)
3695 break;
3696 SM_STEP_RUN(WPA_PTK_GROUP);
3697 if (sm->pending_deinit)
3698 break;
3699 wpa_group_sm_step(sm->wpa_auth, sm->group);
3700 } while (sm->changed || sm->wpa_auth->group->changed);
3701 sm->in_step_loop = 0;
3702
3703 if (sm->pending_deinit) {
3704 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3705 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3706 wpa_free_sta_sm(sm);
e4a6ea1d 3707 return 1;
6fc6879b 3708 }
e4a6ea1d 3709 return 0;
6fc6879b
JM		 3710}
3711
3712
3713static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3714{
3715 struct wpa_state_machine *sm = eloop_ctx;
3716 wpa_sm_step(sm);
3717}
3718
3719
3720void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3721{
3722 if (sm == NULL)
3723 return;
3724 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3725}
3726
3727
3728void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3729{
3730 int tmp, i;
3731 struct wpa_group *group;
3732
3733 if (wpa_auth == NULL)
3734 return;
3735
3736 group = wpa_auth->group;
3737
3738 for (i = 0; i < 2; i++) {
3739 tmp = group->GM;
3740 group->GM = group->GN;
3741 group->GN = tmp;
3742#ifdef CONFIG_IEEE80211W
3743 tmp = group->GM_igtk;
3744 group->GM_igtk = group->GN_igtk;
3745 group->GN_igtk = tmp;
3746#endif /* CONFIG_IEEE80211W */
3747 wpa_gtk_update(wpa_auth, group);
9354e594 3748 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 3749 }
3750}
3751
3752
a6da824b 3753static const char * wpa_bool_txt(int val)
6fc6879b 3754{
a6da824b 3755 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 3756}
3757
3758
6fc6879b
JM		 3759#define RSN_SUITE "%02x-%02x-%02x-%d"
3760#define RSN_SUITE_ARG(s) \
3761((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3762
3763int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3764{
3765 int len = 0, ret;
3766 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 3767#ifdef CONFIG_RSN_PREAUTH
3768 const int preauth = 1;
3769#else /* CONFIG_RSN_PREAUTH */
3770 const int preauth = 0;
3771#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 3772
3773 if (wpa_auth == NULL)
3774 return len;
3775
3776 ret = os_snprintf(buf + len, buflen - len,
3777 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 3778 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 3779 "dot11RSNAEnabled=%s\n"
3780 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 3781 wpa_bool_txt(preauth),
6fc6879b
JM		 3782 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3783 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 3784 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3785 return len;
3786 len += ret;
3787
3788 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3789 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3790
3791 ret = os_snprintf(
3792 buf + len, buflen - len,
3793 "dot11RSNAConfigVersion=%u\n"
3794 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3795 /* FIX: dot11RSNAConfigGroupCipher */
3796 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3797 /* FIX: dot11RSNAConfigGroupRekeyTime */
3798 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3799 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3800 "dot11RSNAConfigGroupUpdateCount=%u\n"
3801 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3802 "dot11RSNAConfigGroupCipherSize=%u\n"
3803 "dot11RSNAConfigPMKLifetime=%u\n"
3804 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3805 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3806 "dot11RSNAConfigSATimeout=%u\n"
3807 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3808 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3809 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3810 "dot11RSNAPMKIDUsed=%s\n"
3811 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3812 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3813 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3814 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3815 "dot11RSNA4WayHandshakeFailures=%u\n"
3816 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3817 RSN_VERSION,
3818 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 3819 wpa_auth->conf.wpa_group_update_count,
3820 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 3821 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 3822 dot11RSNAConfigPMKLifetime,
3823 dot11RSNAConfigPMKReauthThreshold,
3824 dot11RSNAConfigSATimeout,
3825 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3826 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3827 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3828 pmkid_txt,
3829 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3830 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3831 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3832 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3833 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 3834 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3835 return len;
3836 len += ret;
3837
3838 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3839 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3840
3841 /* Private MIB */
3842 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3843 wpa_auth->group->wpa_group_state);
d85e1fc8 3844 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3845 return len;
3846 len += ret;
3847
3848 return len;
3849}
3850
3851
3852int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3853{
3854 int len = 0, ret;
3855 u32 pairwise = 0;
3856
3857 if (sm == NULL)
3858 return 0;
3859
3860 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3861
3862 /* dot11RSNAStatsEntry */
3863
c3550295
JM		 3864 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3865 WPA_PROTO_RSN : WPA_PROTO_WPA,
3866 sm->pairwise);
3867 if (pairwise == 0)
6fc6879b
JM		 3868 return 0;
3869
3870 ret = os_snprintf(
3871 buf + len, buflen - len,
3872 /* TODO: dot11RSNAStatsIndex */
3873 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3874 "dot11RSNAStatsVersion=1\n"
3875 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3876 /* TODO: dot11RSNAStatsTKIPICVErrors */
3877 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 3878 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 3879 /* TODO: dot11RSNAStatsCCMPReplays */
3880 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3881 /* TODO: dot11RSNAStatsTKIPReplays */,
3882 MAC2STR(sm->addr),
3883 RSN_SUITE_ARG(pairwise),
3884 sm->dot11RSNAStatsTKIPLocalMICFailures,
3885 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 3886 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3887 return len;
3888 len += ret;
3889
3890 /* Private MIB */
3891 ret = os_snprintf(buf + len, buflen - len,
3892 "hostapdWPAPTKState=%d\n"
3893 "hostapdWPAPTKGroupState=%d\n",
3894 sm->wpa_ptk_state,
3895 sm->wpa_ptk_group_state);
d85e1fc8 3896 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3897 return len;
3898 len += ret;
3899
3900 return len;
3901}
3902
3903
3904void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3905{
3906 if (wpa_auth)
3907 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3908}
3909
3910
3911int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3912{
3913 return sm && sm->pairwise_set;
3914}
3915
3916
ff36ff00
JM		 3917int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3918{
3919 return sm->pairwise;
3920}
3921
3922
6fc6879b
JM		 3923int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3924{
3925 if (sm == NULL)
3926 return -1;
3927 return sm->wpa_key_mgmt;
3928}
3929
3930
3931int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3932{
3933 if (sm == NULL)
3934 return 0;
3935 return sm->wpa;
3936}
3937
3938
3939int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3940 struct rsn_pmksa_cache_entry *entry)
3941{
3942 if (sm == NULL || sm->pmksa != entry)
3943 return -1;
3944 sm->pmksa = NULL;
3945 return 0;
3946}
3947
3948
3949struct rsn_pmksa_cache_entry *
3950wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3951{
3952 return sm ? sm->pmksa : NULL;
3953}
3954
3955
3956void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3957{
3958 if (sm)
3959 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3960}
3961
3962
3963const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3964{
3965 if (wpa_auth == NULL)
3966 return NULL;
3967 *len = wpa_auth->wpa_ie_len;
3968 return wpa_auth->wpa_ie;
3969}
3970
3971
3972int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 3973 unsigned int pmk_len,
6fc6879b
JM		 3974 int session_timeout, struct eapol_state_machine *eapol)
3975{
cb465555
JM		 3976 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3977 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 3978 return -1;
3979
834c5d68 3980 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
207976f0
JM		 3981 if (pmk_len > PMK_LEN_SUITE_B_192)
3982 pmk_len = PMK_LEN_SUITE_B_192;
3983 } else if (pmk_len > PMK_LEN) {
3984 pmk_len = PMK_LEN;
3985 }
3986
70c93963 3987 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 3988 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 3989 sm->wpa_auth->addr, sm->addr, session_timeout,
3990 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 3991 return 0;
3992
3993 return -1;
3994}
3995
3996
3997int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3998 const u8 *pmk, size_t len, const u8 *sta_addr,
3999 int session_timeout,
4000 struct eapol_state_machine *eapol)
4001{
4002 if (wpa_auth == NULL)
4003 return -1;
4004
70c93963 4005 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 4006 NULL, 0,
4007 wpa_auth->addr,
4bb081f1
JM		 4008 sta_addr, session_timeout, eapol,
4009 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 4010 return 0;
4011
4012 return -1;
4013}
4014
4015
f2991170 4016int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 4017 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 4018{
4019 if (wpa_auth->conf.disable_pmksa_caching)
4020 return -1;
4021
70c93963 4022 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 4023 NULL, 0,
f2991170
JM		 4024 wpa_auth->addr, addr, 0, NULL,
4025 WPA_KEY_MGMT_SAE))
4026 return 0;
4027
4028 return -1;
4029}
4030
4031
0c52953b
JM		 4032int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4033 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4034 int session_timeout, int akmp)
4035{
4036 if (wpa_auth->conf.disable_pmksa_caching)
4037 return -1;
4038
4039 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4040 NULL, 0, wpa_auth->addr, addr, session_timeout,
4041 NULL, akmp))
4042 return 0;
4043
4044 return -1;
4045}
4046
4047
901d1fe1
JM		 4048void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4049 const u8 *sta_addr)
4050{
4051 struct rsn_pmksa_cache_entry *pmksa;
4052
4053 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4054 return;
4055 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4056 if (pmksa) {
4057 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4058 MACSTR " based on request", MAC2STR(sta_addr));
4059 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4060 }
4061}
4062
4063
b8daac18
MH		 4064int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4065 size_t len)
4066{
4067 if (!wpa_auth || !wpa_auth->pmksa)
4068 return 0;
4069 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4070}
4071
4072
4c522c77
MH		 4073void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4074{
4075 if (wpa_auth && wpa_auth->pmksa)
4076 pmksa_cache_auth_flush(wpa_auth->pmksa);
4077}
4078
4079
4d77d80e
MH		 4080#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4081#ifdef CONFIG_MESH
4082
4083int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4084 char *buf, size_t len)
4085{
4086 if (!wpa_auth || !wpa_auth->pmksa)
4087 return 0;
4088
4089 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4090}
4091
4092
4093struct rsn_pmksa_cache_entry *
4094wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4095 const u8 *pmkid, int expiration)
4096{
4097 struct rsn_pmksa_cache_entry *entry;
4098 struct os_reltime now;
4099
4100 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4101 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4102 if (!entry)
4103 return NULL;
4104
4105 os_get_reltime(&now);
4106 entry->expiration = now.sec + expiration;
4107 return entry;
4108}
4109
4110
4111int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4112 struct rsn_pmksa_cache_entry *entry)
4113{
4114 int ret;
4115
4116 if (!wpa_auth || !wpa_auth->pmksa)
4117 return -1;
4118
4119 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4120 if (ret < 0)
4121 wpa_printf(MSG_DEBUG,
4122 "RSN: Failed to store external PMKSA cache for "
4123 MACSTR, MAC2STR(entry->spa));
4124
4125 return ret;
4126}
4127
4128#endif /* CONFIG_MESH */
4129#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4130
4131
9f2cf23e 4132struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 4133wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4134 const u8 *pmkid)
9f2cf23e
MH		 4135{
4136 if (!wpa_auth || !wpa_auth->pmksa)
4137 return NULL;
c1bd4bac 4138 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 4139}
4140
4141
4142void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4143 struct wpa_state_machine *sm,
4144 struct wpa_authenticator *wpa_auth,
4145 u8 *pmkid, u8 *pmk)
4146{
4147 if (!sm)
4148 return;
4149
4150 sm->pmksa = pmksa;
8854f90b
JM		 4151 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4152 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4153 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 4154}
4155
4156
a0ad9e8c
MB		 4157/*
4158 * Remove and free the group from wpa_authenticator. This is triggered by a
4159 * callback to make sure nobody is currently iterating the group list while it
4160 * gets modified.
4161 */
4162static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4163 struct wpa_group *group)
4164{
4165 struct wpa_group *prev = wpa_auth->group;
4166
4167 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4168 group->vlan_id);
4169
4170 while (prev) {
4171 if (prev->next == group) {
4172 /* This never frees the special first group as needed */
4173 prev->next = group->next;
4174 os_free(group);
4175 break;
4176 }
4177 prev = prev->next;
4178 }
4179
4180}
4181
4182
4183/* Increase the reference counter for group */
4184static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4185 struct wpa_group *group)
4186{
4187 /* Skip the special first group */
4188 if (wpa_auth->group == group)
4189 return;
4190
4191 group->references++;
4192}
4193
4194
4195/* Decrease the reference counter and maybe free the group */
4196static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4197 struct wpa_group *group)
4198{
4199 /* Skip the special first group */
4200 if (wpa_auth->group == group)
4201 return;
4202
4203 group->references--;
4204 if (group->references)
4205 return;
4206 wpa_group_free(wpa_auth, group);
4207}
4208
4209
4210/*
4211 * Add a group that has its references counter set to zero. Caller needs to
4212 * call wpa_group_get() on the return value to mark the entry in use.
4213 */
6fc6879b
JM		 4214static struct wpa_group *
4215wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4216{
4217 struct wpa_group *group;
4218
4219 if (wpa_auth == NULL || wpa_auth->group == NULL)
4220 return NULL;
4221
4222 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4223 vlan_id);
bdffdc5d 4224 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4225 if (group == NULL)
4226 return NULL;
4227
4228 group->next = wpa_auth->group->next;
4229 wpa_auth->group->next = group;
4230
4231 return group;
4232}
4233
4234
7cebc8e2
MB		 4235/*
4236 * Enforce that the group state machine for the VLAN is running, increase
4237 * reference counter as interface is up. References might have been increased
4238 * even if a negative value is returned.
4239 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4240 */
4241int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4242{
4243 struct wpa_group *group;
4244
4245 if (wpa_auth == NULL)
4246 return 0;
4247
4248 group = wpa_auth->group;
4249 while (group) {
4250 if (group->vlan_id == vlan_id)
4251 break;
4252 group = group->next;
4253 }
4254
4255 if (group == NULL) {
4256 group = wpa_auth_add_group(wpa_auth, vlan_id);
4257 if (group == NULL)
4258 return -1;
4259 }
4260
4261 wpa_printf(MSG_DEBUG,
4262 "WPA: Ensure group state machine running for VLAN ID %d",
4263 vlan_id);
4264
4265 wpa_group_get(wpa_auth, group);
4266 group->num_setup_iface++;
4267
4268 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4269 return -1;
4270
4271 return 0;
4272}
4273
4274
4275/*
4276 * Decrease reference counter, expected to be zero afterwards.
4277 * returns: -1 on error (group not found, group in fail state)
4278 * -2 if wpa_group is still referenced
4279 * 0 else
4280 */
4281int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4282{
4283 struct wpa_group *group;
4284 int ret = 0;
4285
4286 if (wpa_auth == NULL)
4287 return 0;
4288
4289 group = wpa_auth->group;
4290 while (group) {
4291 if (group->vlan_id == vlan_id)
4292 break;
4293 group = group->next;
4294 }
4295
4296 if (group == NULL)
4297 return -1;
4298
4299 wpa_printf(MSG_DEBUG,
4300 "WPA: Try stopping group state machine for VLAN ID %d",
4301 vlan_id);
4302
4303 if (group->num_setup_iface <= 0) {
4304 wpa_printf(MSG_ERROR,
4305 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4306 vlan_id);
4307 return -1;
4308 }
4309 group->num_setup_iface--;
4310
4311 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4312 ret = -1;
4313
4314 if (group->references > 1) {
4315 wpa_printf(MSG_DEBUG,
4316 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4317 vlan_id);
4318 ret = -2;
4319 }
4320
4321 wpa_group_put(wpa_auth, group);
4322
4323 return ret;
4324}
4325
4326
6fc6879b
JM		 4327int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4328{
4329 struct wpa_group *group;
4330
4331 if (sm == NULL || sm->wpa_auth == NULL)
4332 return 0;
4333
4334 group = sm->wpa_auth->group;
4335 while (group) {
4336 if (group->vlan_id == vlan_id)
4337 break;
4338 group = group->next;
4339 }
4340
4341 if (group == NULL) {
4342 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4343 if (group == NULL)
4344 return -1;
4345 }
4346
4347 if (sm->group == group)
4348 return 0;
4349
7d7f7be2
JM		 4350 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4351 return -1;
4352
6fc6879b
JM		 4353 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4354 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4355
a0ad9e8c
MB		 4356 wpa_group_get(sm->wpa_auth, group);
4357 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4358 sm->group = group;
a0ad9e8c 4359
6fc6879b
JM		 4360 return 0;
4361}
e4bf4db9
JM		 4362
4363
4364void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4365 struct wpa_state_machine *sm, int ack)
4366{
4367 if (wpa_auth == NULL || sm == NULL)
4368 return;
4369 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4370 " ack=%d", MAC2STR(sm->addr), ack);
4371 if (sm->pending_1_of_4_timeout && ack) {
4372 /*
4373 * Some deployed supplicant implementations update their SNonce
4374 * for each EAPOL-Key 2/4 message even within the same 4-way
4375 * handshake and then fail to use the first SNonce when
4376 * deriving the PTK. This results in unsuccessful 4-way
4377 * handshake whenever the relatively short initial timeout is
4378 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4379 * around this by increasing the timeout now that we know that
4380 * the station has received the frame.
4381 */
4382 int timeout_ms = eapol_key_timeout_subseq;
4383 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4384 "timeout by %u ms because of acknowledged frame",
4385 timeout_ms);
4386 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4387 eloop_register_timeout(timeout_ms / 1000,
4388 (timeout_ms % 1000) * 1000,
4389 wpa_send_eapol_timeout, wpa_auth, sm);
4390 }
4391}
c10347f2
JM		 4392
4393
4394int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4395{
4396 if (sm == NULL)
4397 return 0;
4398 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4399}
aa189ac9
JM		 4400
4401
4402int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4403{
4404 if (sm == NULL)
4405 return 0;
4406 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4407}
25ef8529
JM		 4408
4409
4410#ifdef CONFIG_P2P
4411int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4412{
4413 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4414 return -1;
4415 os_memcpy(addr, sm->ip_addr, 4);
4416 return 0;
4417}
4418#endif /* CONFIG_P2P */
cbc210de
JM		 4419
4420
4421int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4422 struct radius_das_attrs *attr)
4423{
4424 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4425}
34782730
JM		 4426
4427
4428void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4429{
4430 struct wpa_group *group;
4431
4432 if (!wpa_auth)
4433 return;
4434 for (group = wpa_auth->group; group; group = group->next)
4435 wpa_group_config_group_keys(wpa_auth, group);
4436}
7eace378
JM		 4437
4438
4439#ifdef CONFIG_FILS
4440
4441struct wpa_auth_fils_iter_data {
4442 struct wpa_authenticator *auth;
4443 const u8 *cache_id;
4444 struct rsn_pmksa_cache_entry *pmksa;
4445 const u8 *spa;
4446 const u8 *pmkid;
4447};
4448
4449
4450static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4451{
4452 struct wpa_auth_fils_iter_data *data = ctx;
4453
4cc6574d 4454 if (a == data->auth || !a->conf.fils_cache_id_set ||
7eace378
JM		 4455 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4456 FILS_CACHE_ID_LEN) != 0)
4457 return 0;
4458 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4459 return data->pmksa != NULL;
4460}
4461
4462
4463struct rsn_pmksa_cache_entry *
4464wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4465 const u8 *sta_addr, const u8 *pmkid)
4466{
4467 struct wpa_auth_fils_iter_data idata;
4468
4469 if (!wpa_auth->conf.fils_cache_id_set)
4470 return NULL;
4471 idata.auth = wpa_auth;
4472 idata.cache_id = wpa_auth->conf.fils_cache_id;
4473 idata.pmksa = NULL;
4474 idata.spa = sta_addr;
4475 idata.pmkid = pmkid;
4476 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4477 return idata.pmksa;
4478}
4479
5db997e3
JM		 4480
4481#ifdef CONFIG_IEEE80211R_AP
4482int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, u8 *buf, size_t len)
4483{
4484 struct wpa_auth_config *conf = &wpa_auth->conf;
4485
4486 return wpa_write_ftie(conf, conf->r0_key_holder,
4487 conf->r0_key_holder_len,
4488 NULL, NULL, buf, len, NULL, 0);
4489}
4490#endif /* CONFIG_IEEE80211R_AP */
4491
8acbf85f
JM		 4492
4493void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4494 u8 *fils_anonce, u8 *fils_snonce,
4495 u8 *fils_kek, size_t *fils_kek_len)
4496{
4497 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4498 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4499 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4500 *fils_kek_len = sm->PTK.kek_len;
4501}
4502
7eace378 4503#endif /* CONFIG_FILS */
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