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OCV: Add utility functions to insert OCI elements
[thirdparty/hostap.git] / src / ap / wpa_auth.c
CommitLineData
6fc6879b 1/*
00338a4f 2 * IEEE 802.11 RSN / WPA Authenticator
9f12271b 3 * Copyright (c) 2004-2018, 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"
c6eb3e34 22#include "crypto/sha384.h"
3642c431 23#include "crypto/random.h"
281c950b 24#include "eapol_auth/eapol_auth_sm.h"
6226e38d 25#include "ap_config.h"
6fc6879b 26#include "ieee802_11.h"
6226e38d
JM		 27#include "wpa_auth.h"
28#include "pmksa_cache_auth.h"
6fc6879b
JM		 29#include "wpa_auth_i.h"
30#include "wpa_auth_ie.h"
31
32#define STATE_MACHINE_DATA struct wpa_state_machine
33#define STATE_MACHINE_DEBUG_PREFIX "WPA"
34#define STATE_MACHINE_ADDR sm->addr
35
36
37static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 38static int wpa_sm_step(struct wpa_state_machine *sm);
567da5bb
JM		 39static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
40 u8 *data, size_t data_len);
75c8563e
JM		 41#ifdef CONFIG_FILS
42static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
43 u8 *buf, size_t buf_len, u16 *_key_data_len);
9392859d
JM		 44static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
45 const struct wpabuf *hlp);
75c8563e 46#endif /* CONFIG_FILS */
6fc6879b
JM		 47static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
48static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
49 struct wpa_group *group);
581a8cde 50static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 51static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
52 struct wpa_group *group);
1bdb7ab3
JM		 53static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
54 struct wpa_group *group);
f23c5b17 55static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 56 const u8 *pmk, unsigned int pmk_len,
57 struct wpa_ptk *ptk);
a0ad9e8c
MB		 58static void wpa_group_free(struct wpa_authenticator *wpa_auth,
59 struct wpa_group *group);
60static void wpa_group_get(struct wpa_authenticator *wpa_auth,
61 struct wpa_group *group);
62static void wpa_group_put(struct wpa_authenticator *wpa_auth,
63 struct wpa_group *group);
e73ffa09 64static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
6fc6879b 65
bae61562
JM		 66static const u32 eapol_key_timeout_first = 100; /* ms */
67static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 68static const u32 eapol_key_timeout_first_group = 500; /* ms */
6f234c1e 69static const u32 eapol_key_timeout_no_retrans = 4000; /* ms */
6fc6879b
JM		 70
71/* TODO: make these configurable */
72static const int dot11RSNAConfigPMKLifetime = 43200;
73static const int dot11RSNAConfigPMKReauthThreshold = 70;
74static const int dot11RSNAConfigSATimeout = 60;
75
76
c772d054 77static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 78 struct wpa_authenticator *wpa_auth, const u8 *addr)
79{
cef8fac0
JB		 80 if (wpa_auth->cb->mic_failure_report)
81 return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
c772d054 82 return 0;
6fc6879b
JM		 83}
84
85
2c502460
JM		 86static inline void wpa_auth_psk_failure_report(
87 struct wpa_authenticator *wpa_auth, const u8 *addr)
88{
cef8fac0
JB		 89 if (wpa_auth->cb->psk_failure_report)
90 wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
2c502460
JM		 91}
92
93
6fc6879b
JM		 94static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
95 const u8 *addr, wpa_eapol_variable var,
96 int value)
97{
cef8fac0
JB		 98 if (wpa_auth->cb->set_eapol)
99 wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
6fc6879b
JM		 100}
101
102
103static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
104 const u8 *addr, wpa_eapol_variable var)
105{
cef8fac0 106 if (wpa_auth->cb->get_eapol == NULL)
6fc6879b 107 return -1;
cef8fac0 108 return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
6fc6879b
JM		 109}
110
111
112static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 113 const u8 *addr,
114 const u8 *p2p_dev_addr,
7a12edd1 115 const u8 *prev_psk, size_t *psk_len)
6fc6879b 116{
cef8fac0 117 if (wpa_auth->cb->get_psk == NULL)
6fc6879b 118 return NULL;
cef8fac0 119 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
7a12edd1 120 prev_psk, psk_len);
6fc6879b
JM		 121}
122
123
124static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
125 const u8 *addr, u8 *msk, size_t *len)
126{
cef8fac0 127 if (wpa_auth->cb->get_msk == NULL)
6fc6879b 128 return -1;
cef8fac0 129 return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
6fc6879b
JM		 130}
131
132
133static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
134 int vlan_id,
71934751 135 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 136 u8 *key, size_t key_len)
137{
cef8fac0 138 if (wpa_auth->cb->set_key == NULL)
6fc6879b 139 return -1;
cef8fac0
JB		 140 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
141 key, key_len);
6fc6879b
JM		 142}
143
144
145static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
146 const u8 *addr, int idx, u8 *seq)
147{
cef8fac0 148 if (wpa_auth->cb->get_seqnum == NULL)
6fc6879b 149 return -1;
cef8fac0 150 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
6fc6879b
JM		 151}
152
153
6fc6879b
JM		 154static inline int
155wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
156 const u8 *data, size_t data_len, int encrypt)
157{
cef8fac0 158 if (wpa_auth->cb->send_eapol == NULL)
6fc6879b 159 return -1;
cef8fac0
JB		 160 return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
161 encrypt);
6fc6879b
JM		 162}
163
164
c50d94f1
BC		 165#ifdef CONFIG_MESH
166static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
167 const u8 *addr)
168{
cef8fac0 169 if (wpa_auth->cb->start_ampe == NULL)
c50d94f1 170 return -1;
cef8fac0 171 return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
c50d94f1
BC		 172}
173#endif /* CONFIG_MESH */
174
175
6fc6879b
JM		 176int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
177 int (*cb)(struct wpa_state_machine *sm, void *ctx),
178 void *cb_ctx)
179{
cef8fac0 180 if (wpa_auth->cb->for_each_sta == NULL)
6fc6879b 181 return 0;
cef8fac0 182 return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
6fc6879b
JM		 183}
184
185
bf98f7f3
JM		 186int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
187 int (*cb)(struct wpa_authenticator *a, void *ctx),
188 void *cb_ctx)
189{
cef8fac0 190 if (wpa_auth->cb->for_each_auth == NULL)
bf98f7f3 191 return 0;
cef8fac0 192 return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
bf98f7f3
JM		 193}
194
195
6fc6879b
JM		 196void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
197 logger_level level, const char *txt)
198{
cef8fac0 199 if (wpa_auth->cb->logger == NULL)
6fc6879b 200 return;
cef8fac0 201 wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
6fc6879b
JM		 202}
203
204
205void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
206 logger_level level, const char *fmt, ...)
207{
208 char *format;
209 int maxlen;
210 va_list ap;
211
cef8fac0 212 if (wpa_auth->cb->logger == NULL)
6fc6879b
JM		 213 return;
214
215 maxlen = os_strlen(fmt) + 100;
216 format = os_malloc(maxlen);
217 if (!format)
218 return;
219
220 va_start(ap, fmt);
221 vsnprintf(format, maxlen, fmt, ap);
222 va_end(ap);
223
224 wpa_auth_logger(wpa_auth, addr, level, format);
225
226 os_free(format);
227}
228
229
230static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
567da5bb 231 const u8 *addr, u16 reason)
6fc6879b 232{
cef8fac0 233 if (wpa_auth->cb->disconnect == NULL)
6fc6879b 234 return;
567da5bb
JM		 235 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)",
236 MAC2STR(addr), reason);
237 wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason);
6fc6879b
JM		 238}
239
240
6fc6879b
JM		 241static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
242{
243 struct wpa_authenticator *wpa_auth = eloop_ctx;
244
3642c431 245 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 246 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
247 "initialization.");
248 } else {
249 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 250 wpa_hexdump_key(MSG_DEBUG, "GMK",
251 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 252 }
253
254 if (wpa_auth->conf.wpa_gmk_rekey) {
255 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
256 wpa_rekey_gmk, wpa_auth, NULL);
257 }
258}
259
260
261static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
262{
263 struct wpa_authenticator *wpa_auth = eloop_ctx;
a0ad9e8c 264 struct wpa_group *group, *next;
6fc6879b
JM		 265
266 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
a0ad9e8c
MB		 267 group = wpa_auth->group;
268 while (group) {
269 wpa_group_get(wpa_auth, group);
270
6fc6879b
JM		 271 group->GTKReKey = TRUE;
272 do {
273 group->changed = FALSE;
274 wpa_group_sm_step(wpa_auth, group);
275 } while (group->changed);
a0ad9e8c
MB		 276
277 next = group->next;
278 wpa_group_put(wpa_auth, group);
279 group = next;
6fc6879b
JM		 280 }
281
282 if (wpa_auth->conf.wpa_group_rekey) {
283 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
284 0, wpa_rekey_gtk, wpa_auth, NULL);
285 }
286}
287
288
581a8cde
JM		 289static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
290{
291 struct wpa_authenticator *wpa_auth = eloop_ctx;
292 struct wpa_state_machine *sm = timeout_ctx;
293
294 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
295 wpa_request_new_ptk(sm);
296 wpa_sm_step(sm);
297}
298
299
6fc6879b
JM		 300static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
301{
302 if (sm->pmksa == ctx)
303 sm->pmksa = NULL;
304 return 0;
305}
306
307
308static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
309 void *ctx)
310{
311 struct wpa_authenticator *wpa_auth = ctx;
312 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
313}
314
315
1bdb7ab3
JM		 316static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
317 struct wpa_group *group)
318{
559cdabb 319 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 320 u8 rkey[32];
559cdabb 321 unsigned long ptr;
1bdb7ab3 322
3642c431 323 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 324 return -1;
325 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
326
327 /*
328 * Counter = PRF-256(Random number, "Init Counter",
329 * Local MAC Address || Time)
330 */
331 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
332 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 333 ptr = (unsigned long) group;
334 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
3642c431 335 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 336 return -1;
337
338 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
339 group->Counter, WPA_NONCE_LEN) < 0)
340 return -1;
341 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
342 group->Counter, WPA_NONCE_LEN);
343
344 return 0;
345}
346
347
e6965d4e 348static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 349 int vlan_id, int delay_init)
e6965d4e
JM		 350{
351 struct wpa_group *group;
e6965d4e
JM		 352
353 group = os_zalloc(sizeof(struct wpa_group));
354 if (group == NULL)
355 return NULL;
356
357 group->GTKAuthenticator = TRUE;
358 group->vlan_id = vlan_id;
c3550295 359 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 360
08704cd8
JM		 361 if (random_pool_ready() != 1) {
362 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
363 "for secure operations - update keys later when "
364 "the first station connects");
365 }
366
1bdb7ab3
JM		 367 /*
368 * Set initial GMK/Counter value here. The actual values that will be
369 * used in negotiations will be set once the first station tries to
370 * connect. This allows more time for collecting additional randomness
371 * on embedded devices.
6fc6879b 372 */
1bdb7ab3 373 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 374 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
375 "initialization.");
376 os_free(group);
377 return NULL;
378 }
6fc6879b
JM		 379
380 group->GInit = TRUE;
bdffdc5d
JM		 381 if (delay_init) {
382 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
383 "until Beacon frames have been configured");
384 /* Initialization is completed in wpa_init_keys(). */
385 } else {
386 wpa_group_sm_step(wpa_auth, group);
387 group->GInit = FALSE;
388 wpa_group_sm_step(wpa_auth, group);
389 }
6fc6879b
JM		 390
391 return group;
392}
393
394
395/**
396 * wpa_init - Initialize WPA authenticator
397 * @addr: Authenticator address
398 * @conf: Configuration for WPA authenticator
a17df5fb 399 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 400 * Returns: Pointer to WPA authenticator data or %NULL on failure
401 */
402struct wpa_authenticator * wpa_init(const u8 *addr,
403 struct wpa_auth_config *conf,
cef8fac0
JB		 404 const struct wpa_auth_callbacks *cb,
405 void *cb_ctx)
6fc6879b
JM		 406{
407 struct wpa_authenticator *wpa_auth;
408
409 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
410 if (wpa_auth == NULL)
411 return NULL;
412 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
413 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
cef8fac0
JB		 414 wpa_auth->cb = cb;
415 wpa_auth->cb_ctx = cb_ctx;
6fc6879b
JM		 416
417 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
418 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
419 os_free(wpa_auth);
420 return NULL;
421 }
422
bdffdc5d 423 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 424 if (wpa_auth->group == NULL) {
425 os_free(wpa_auth->wpa_ie);
426 os_free(wpa_auth);
427 return NULL;
428 }
429
4bb081f1
JM		 430 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
431 wpa_auth);
6fc6879b
JM		 432 if (wpa_auth->pmksa == NULL) {
433 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 434 os_free(wpa_auth->group);
6fc6879b
JM		 435 os_free(wpa_auth->wpa_ie);
436 os_free(wpa_auth);
437 return NULL;
438 }
439
4ec1fd8e 440#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 441 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
442 if (wpa_auth->ft_pmk_cache == NULL) {
443 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 444 os_free(wpa_auth->group);
6fc6879b 445 os_free(wpa_auth->wpa_ie);
4bb081f1 446 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 447 os_free(wpa_auth);
448 return NULL;
449 }
4ec1fd8e 450#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 451
452 if (wpa_auth->conf.wpa_gmk_rekey) {
453 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
454 wpa_rekey_gmk, wpa_auth, NULL);
455 }
456
457 if (wpa_auth->conf.wpa_group_rekey) {
458 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
459 wpa_rekey_gtk, wpa_auth, NULL);
460 }
461
25ef8529
JM		 462#ifdef CONFIG_P2P
463 if (WPA_GET_BE32(conf->ip_addr_start)) {
464 int count = WPA_GET_BE32(conf->ip_addr_end) -
465 WPA_GET_BE32(conf->ip_addr_start) + 1;
466 if (count > 1000)
467 count = 1000;
468 if (count > 0)
469 wpa_auth->ip_pool = bitfield_alloc(count);
470 }
471#endif /* CONFIG_P2P */
472
6fc6879b
JM		 473 return wpa_auth;
474}
475
476
bdffdc5d
JM		 477int wpa_init_keys(struct wpa_authenticator *wpa_auth)
478{
479 struct wpa_group *group = wpa_auth->group;
480
481 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
482 "keys");
483 wpa_group_sm_step(wpa_auth, group);
484 group->GInit = FALSE;
485 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 486 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
487 return -1;
bdffdc5d
JM		 488 return 0;
489}
490
491
6fc6879b
JM		 492/**
493 * wpa_deinit - Deinitialize WPA authenticator
494 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
495 */
496void wpa_deinit(struct wpa_authenticator *wpa_auth)
497{
498 struct wpa_group *group, *prev;
499
500 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
501 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
502
4bb081f1 503 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b 504
4ec1fd8e 505#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 506 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
507 wpa_auth->ft_pmk_cache = NULL;
eefe8630 508 wpa_ft_deinit(wpa_auth);
4ec1fd8e 509#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 510
25ef8529
JM		 511#ifdef CONFIG_P2P
512 bitfield_free(wpa_auth->ip_pool);
513#endif /* CONFIG_P2P */
514
515
6fc6879b
JM		 516 os_free(wpa_auth->wpa_ie);
517
518 group = wpa_auth->group;
519 while (group) {
520 prev = group;
521 group = group->next;
522 os_free(prev);
523 }
524
525 os_free(wpa_auth);
526}
527
528
529/**
530 * wpa_reconfig - Update WPA authenticator configuration
531 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
532 * @conf: Configuration for WPA authenticator
533 */
534int wpa_reconfig(struct wpa_authenticator *wpa_auth,
535 struct wpa_auth_config *conf)
536{
e6965d4e 537 struct wpa_group *group;
6fc6879b
JM		 538 if (wpa_auth == NULL)
539 return 0;
540
541 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 542 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
543 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
544 return -1;
545 }
546
e6965d4e
JM		 547 /*
548 * Reinitialize GTK to make sure it is suitable for the new
549 * configuration.
550 */
551 group = wpa_auth->group;
c3550295 552 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 553 group->GInit = TRUE;
554 wpa_group_sm_step(wpa_auth, group);
555 group->GInit = FALSE;
556 wpa_group_sm_step(wpa_auth, group);
557
6fc6879b
JM		 558 return 0;
559}
560
561
562struct wpa_state_machine *
94ddef3e
JM		 563wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
564 const u8 *p2p_dev_addr)
6fc6879b
JM		 565{
566 struct wpa_state_machine *sm;
567
7d7f7be2
JM		 568 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
569 return NULL;
570
6fc6879b
JM		 571 sm = os_zalloc(sizeof(struct wpa_state_machine));
572 if (sm == NULL)
573 return NULL;
574 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 575 if (p2p_dev_addr)
576 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 577
578 sm->wpa_auth = wpa_auth;
579 sm->group = wpa_auth->group;
a0ad9e8c 580 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 581
582 return sm;
583}
584
585
6f9b5d16
JM		 586int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
587 struct wpa_state_machine *sm)
6fc6879b
JM		 588{
589 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 590 return -1;
6fc6879b 591
4ec1fd8e 592#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 593 if (sm->ft_completed) {
594 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
595 "FT authentication already completed - do not "
596 "start 4-way handshake");
3d4d2348
JM		 597 /* Go to PTKINITDONE state to allow GTK rekeying */
598 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 599 sm->Pair = TRUE;
6f9b5d16 600 return 0;
6fc6879b 601 }
4ec1fd8e 602#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 603
07e0117d
JM		 604#ifdef CONFIG_FILS
605 if (sm->fils_completed) {
606 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
607 "FILS authentication already completed - do not start 4-way handshake");
608 /* Go to PTKINITDONE state to allow GTK rekeying */
609 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 610 sm->Pair = TRUE;
07e0117d
JM		 611 return 0;
612 }
613#endif /* CONFIG_FILS */
614
6fc6879b 615 if (sm->started) {
22a299ee 616 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 617 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 618 return wpa_sm_step(sm);
6fc6879b
JM		 619 }
620
621 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
622 "start authentication");
623 sm->started = 1;
624
625 sm->Init = TRUE;
e4a6ea1d 626 if (wpa_sm_step(sm) == 1)
6f9b5d16 627 return 1; /* should not really happen */
6fc6879b
JM		 628 sm->Init = FALSE;
629 sm->AuthenticationRequest = TRUE;
6f9b5d16 630 return wpa_sm_step(sm);
6fc6879b
JM		 631}
632
633
a8d05fca
JM		 634void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
635{
636 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
637 * reassociates back to the same AP while the previous entry for the
638 * STA has not yet been removed. */
639 if (sm == NULL)
640 return;
641
642 sm->wpa_key_mgmt = 0;
643}
644
645
6fc6879b
JM		 646static void wpa_free_sta_sm(struct wpa_state_machine *sm)
647{
25ef8529
JM		 648#ifdef CONFIG_P2P
649 if (WPA_GET_BE32(sm->ip_addr)) {
650 u32 start;
651 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
652 "address %u.%u.%u.%u from " MACSTR,
653 sm->ip_addr[0], sm->ip_addr[1],
654 sm->ip_addr[2], sm->ip_addr[3],
655 MAC2STR(sm->addr));
656 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
657 bitfield_clear(sm->wpa_auth->ip_pool,
658 WPA_GET_BE32(sm->ip_addr) - start);
659 }
660#endif /* CONFIG_P2P */
2ade8ef2
JM		 661 if (sm->GUpdateStationKeys) {
662 sm->group->GKeyDoneStations--;
663 sm->GUpdateStationKeys = FALSE;
664 }
4ec1fd8e 665#ifdef CONFIG_IEEE80211R_AP
0f857f43 666 os_free(sm->assoc_resp_ftie);
692ec305 667 wpabuf_free(sm->ft_pending_req_ies);
4ec1fd8e 668#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 669 os_free(sm->last_rx_eapol_key);
670 os_free(sm->wpa_ie);
a0ad9e8c 671 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b
JM		 672 os_free(sm);
673}
674
675
676void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
677{
678 if (sm == NULL)
679 return;
680
681 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
682 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
683 "strict rekeying - force GTK rekey since STA "
684 "is leaving");
3f5a1860
JB		 685 if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk,
686 sm->wpa_auth, NULL) == -1)
687 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
688 NULL);
6fc6879b
JM		 689 }
690
691 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 692 sm->pending_1_of_4_timeout = 0;
6fc6879b 693 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 694 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3a46cf93
MB		 695#ifdef CONFIG_IEEE80211R_AP
696 wpa_ft_sta_deinit(sm);
697#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 698 if (sm->in_step_loop) {
699 /* Must not free state machine while wpa_sm_step() is running.
700 * Freeing will be completed in the end of wpa_sm_step(). */
701 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
702 "machine deinit for " MACSTR, MAC2STR(sm->addr));
703 sm->pending_deinit = 1;
704 } else
705 wpa_free_sta_sm(sm);
706}
707
708
709static void wpa_request_new_ptk(struct wpa_state_machine *sm)
710{
711 if (sm == NULL)
712 return;
713
714 sm->PTKRequest = TRUE;
715 sm->PTK_valid = 0;
716}
717
718
68921e24 719static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 720 const u8 *replay_counter)
721{
722 int i;
723 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 724 if (!ctr[i].valid)
22a299ee 725 break;
68921e24 726 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 727 WPA_REPLAY_COUNTER_LEN) == 0)
728 return 1;
729 }
730 return 0;
731}
732
733
68921e24
JM		 734static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
735 const u8 *replay_counter)
736{
737 int i;
738 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
739 if (ctr[i].valid &&
740 (replay_counter == NULL ||
741 os_memcmp(replay_counter, ctr[i].counter,
742 WPA_REPLAY_COUNTER_LEN) == 0))
743 ctr[i].valid = FALSE;
744 }
745}
746
747
4ec1fd8e 748#ifdef CONFIG_IEEE80211R_AP
0f857f43
JM		 749static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
750 struct wpa_state_machine *sm,
751 struct wpa_eapol_ie_parse *kde)
752{
753 struct wpa_ie_data ie;
754 struct rsn_mdie *mdie;
755
756 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
757 ie.num_pmkid != 1 || ie.pmkid == NULL) {
758 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
759 "FT 4-way handshake message 2/4");
760 return -1;
761 }
762
763 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
764 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
765 sm->sup_pmk_r1_name, PMKID_LEN);
766
767 if (!kde->mdie || !kde->ftie) {
768 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
769 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
770 return -1;
771 }
772
773 mdie = (struct rsn_mdie *) (kde->mdie + 2);
774 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
775 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
776 MOBILITY_DOMAIN_ID_LEN) != 0) {
777 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
778 return -1;
779 }
780
781 if (sm->assoc_resp_ftie &&
782 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
783 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
784 2 + sm->assoc_resp_ftie[1]) != 0)) {
785 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
786 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
787 kde->ftie, kde->ftie_len);
788 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
789 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
790 return -1;
791 }
792
793 return 0;
794}
4ec1fd8e 795#endif /* CONFIG_IEEE80211R_AP */
0f857f43
JM		 796
797
c772d054
JM		 798static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
799 struct wpa_state_machine *sm, int group)
ec027805
JM		 800{
801 /* Supplicant reported a Michael MIC error */
802 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
803 "received EAPOL-Key Error Request "
804 "(STA detected Michael MIC failure (group=%d))",
805 group);
fbc72d32
JM		 806
807 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
808 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
809 "ignore Michael MIC failure report since "
810 "group cipher is not TKIP");
811 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
812 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
813 "ignore Michael MIC failure report since "
814 "pairwise cipher is not TKIP");
815 } else {
c772d054
JM		 816 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
817 return 1; /* STA entry was removed */
fbc72d32
JM		 818 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
819 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
820 }
ec027805
JM		 821
822 /*
823 * Error report is not a request for a new key handshake, but since
824 * Authenticator may do it, let's change the keys now anyway.
825 */
826 wpa_request_new_ptk(sm);
c772d054 827 return 0;
ec027805
JM		 828}
829
830
f23c5b17
JM		 831static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
832 size_t data_len)
833{
834 struct wpa_ptk PTK;
835 int ok = 0;
836 const u8 *pmk = NULL;
7a12edd1 837 size_t pmk_len;
f23c5b17 838
b729fd8d 839 os_memset(&PTK, 0, sizeof(PTK));
f23c5b17 840 for (;;) {
e61fea6b
JM		 841 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
842 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
f23c5b17 843 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
7a12edd1 844 sm->p2p_dev_addr, pmk, &pmk_len);
f23c5b17
JM		 845 if (pmk == NULL)
846 break;
f9854c18
MK		 847#ifdef CONFIG_IEEE80211R_AP
848 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
849 os_memcpy(sm->xxkey, pmk, pmk_len);
850 sm->xxkey_len = pmk_len;
851 }
852#endif /* CONFIG_IEEE80211R_AP */
207976f0 853 } else {
f23c5b17 854 pmk = sm->PMK;
207976f0
JM		 855 pmk_len = sm->pmk_len;
856 }
f23c5b17 857
364c064a
JM		 858 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
859 break;
f23c5b17 860
567da5bb
JM		 861 if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
862 data, data_len) == 0) {
f23c5b17
JM		 863 ok = 1;
864 break;
865 }
866
f5e0a332
JM		 867 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
868 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
f23c5b17
JM		 869 break;
870 }
871
872 if (!ok) {
873 wpa_printf(MSG_DEBUG,
874 "WPA: Earlier SNonce did not result in matching MIC");
875 return -1;
876 }
877
878 wpa_printf(MSG_DEBUG,
879 "WPA: Earlier SNonce resulted in matching MIC");
880 sm->alt_snonce_valid = 0;
881 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
882 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
883 sm->PTK_valid = TRUE;
884
885 return 0;
886}
887
888
6fc6879b
JM		 889void wpa_receive(struct wpa_authenticator *wpa_auth,
890 struct wpa_state_machine *sm,
891 u8 *data, size_t data_len)
892{
893 struct ieee802_1x_hdr *hdr;
894 struct wpa_eapol_key *key;
895 u16 key_info, key_data_length;
a0bf1b68 896 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg;
6fc6879b
JM		 897 char *msgtxt;
898 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 899 const u8 *key_data;
900 size_t keyhdrlen, mic_len;
6d014ffc 901 u8 *mic;
6fc6879b
JM		 902
903 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
904 return;
dc5bad48 905 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 906
567da5bb 907 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 908 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 909
dc5bad48
JM		 910 if (data_len < sizeof(*hdr) + keyhdrlen) {
911 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 912 return;
dc5bad48 913 }
6fc6879b
JM		 914
915 hdr = (struct ieee802_1x_hdr *) data;
916 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 917 mic = (u8 *) (key + 1);
6fc6879b 918 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 919 key_data = mic + mic_len + 2;
920 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 921 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 922 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
923 MAC2STR(sm->addr), key_info, key->type,
924 (unsigned int) mic_len, key_data_length);
925 wpa_hexdump(MSG_MSGDUMP,
926 "WPA: EAPOL-Key header (ending before Key MIC)",
927 key, sizeof(*key));
928 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
929 mic, mic_len);
5e3b5197 930 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 931 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
932 "key_data overflow (%d > %lu)",
933 key_data_length,
934 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 935 keyhdrlen));
6fc6879b
JM		 936 return;
937 }
938
f8e96eb6 939 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 940 if (key->type == EAPOL_KEY_TYPE_WPA) {
941 /*
942 * Some deployed station implementations seem to send
943 * msg 4/4 with incorrect type value in WPA2 mode.
944 */
945 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
946 "with unexpected WPA type in RSN mode");
947 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 948 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
949 "unexpected type %d in RSN mode",
950 key->type);
951 return;
952 }
953 } else {
954 if (key->type != EAPOL_KEY_TYPE_WPA) {
955 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
956 "unexpected type %d in WPA mode",
957 key->type);
958 return;
959 }
960 }
961
bc8318ac
JM		 962 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
963 WPA_NONCE_LEN);
964 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
965 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
966
6fc6879b
JM		 967 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
968 * are set */
969
a0bf1b68
JM		 970 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
971 wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message");
972 return;
973 }
974
975 if (key_info & WPA_KEY_INFO_REQUEST) {
6fc6879b
JM		 976 msg = REQUEST;
977 msgtxt = "Request";
978 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
979 msg = GROUP_2;
980 msgtxt = "2/2 Group";
3b5b7aa8
JM		 981 } else if (key_data_length == 0 ||
982 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
983 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 984 msg = PAIRWISE_4;
985 msgtxt = "4/4 Pairwise";
986 } else {
987 msg = PAIRWISE_2;
988 msgtxt = "2/4 Pairwise";
989 }
990
6fc6879b
JM		 991 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
992 msg == GROUP_2) {
993 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 994 if (sm->pairwise == WPA_CIPHER_CCMP ||
995 sm->pairwise == WPA_CIPHER_GCMP) {
4bc801ab
JM		 996 if (wpa_use_cmac(sm->wpa_key_mgmt) &&
997 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 998 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
999 wpa_auth_logger(wpa_auth, sm->addr,
1000 LOGGER_WARNING,
1001 "advertised support for "
1002 "AES-128-CMAC, but did not "
1003 "use it");
1004 return;
1005 }
1006
4bc801ab
JM		 1007 if (!wpa_use_cmac(sm->wpa_key_mgmt) &&
1008 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1009 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1010 wpa_auth_logger(wpa_auth, sm->addr,
1011 LOGGER_WARNING,
1012 "did not use HMAC-SHA1-AES "
eb7719ff 1013 "with CCMP/GCMP");
6fc6879b
JM		 1014 return;
1015 }
1016 }
929a2ea5 1017
4bc801ab 1018 if (wpa_use_akm_defined(sm->wpa_key_mgmt) &&
929a2ea5
JM		 1019 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1020 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1021 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1022 return;
1023 }
6fc6879b
JM		 1024 }
1025
1026 if (key_info & WPA_KEY_INFO_REQUEST) {
1027 if (sm->req_replay_counter_used &&
1028 os_memcmp(key->replay_counter, sm->req_replay_counter,
1029 WPA_REPLAY_COUNTER_LEN) <= 0) {
1030 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1031 "received EAPOL-Key request with "
1032 "replayed counter");
1033 return;
1034 }
1035 }
1036
1037 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1038 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1039 int i;
68921e24
JM		 1040
1041 if (msg == PAIRWISE_2 &&
1042 wpa_replay_counter_valid(sm->prev_key_replay,
1043 key->replay_counter) &&
1044 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1045 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1046 {
1047 /*
1048 * Some supplicant implementations (e.g., Windows XP
1049 * WZC) update SNonce for each EAPOL-Key 2/4. This
1050 * breaks the workaround on accepting any of the
1051 * pending requests, so allow the SNonce to be updated
1052 * even if we have already sent out EAPOL-Key 3/4.
1053 */
1054 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1055 "Process SNonce update from STA "
1056 "based on retransmitted EAPOL-Key "
1057 "1/4");
1058 sm->update_snonce = 1;
f23c5b17
JM		 1059 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1060 sm->alt_snonce_valid = TRUE;
1061 os_memcpy(sm->alt_replay_counter,
1062 sm->key_replay[0].counter,
1063 WPA_REPLAY_COUNTER_LEN);
1064 goto continue_processing;
1065 }
1066
1067 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1068 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1069 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1070 WPA_REPLAY_COUNTER_LEN) == 0) {
1071 /*
1072 * Supplicant may still be using the old SNonce since
1073 * there was two EAPOL-Key 2/4 messages and they had
1074 * different SNonce values.
1075 */
1076 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1077 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1078 goto continue_processing;
1079 }
1080
1081 if (msg == PAIRWISE_2 &&
1082 wpa_replay_counter_valid(sm->prev_key_replay,
1083 key->replay_counter) &&
1084 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1085 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1086 "ignore retransmitted EAPOL-Key %s - "
1087 "SNonce did not change", msgtxt);
1088 } else {
1089 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1090 "received EAPOL-Key %s with "
1091 "unexpected replay counter", msgtxt);
1092 }
22a299ee
JM		 1093 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1094 if (!sm->key_replay[i].valid)
1095 break;
1096 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1097 sm->key_replay[i].counter,
1098 WPA_REPLAY_COUNTER_LEN);
1099 }
6fc6879b
JM		 1100 wpa_hexdump(MSG_DEBUG, "received replay counter",
1101 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1102 return;
1103 }
1104
68921e24 1105continue_processing:
3b5b7aa8
JM		 1106#ifdef CONFIG_FILS
1107 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1108 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1109 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1110 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1111 return;
1112 }
1113#endif /* CONFIG_FILS */
1114
6fc6879b
JM		 1115 switch (msg) {
1116 case PAIRWISE_2:
1117 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1118 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1119 (!sm->update_snonce ||
1120 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1121 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1122 "received EAPOL-Key msg 2/4 in "
1123 "invalid state (%d) - dropped",
1124 sm->wpa_ptk_state);
1125 return;
1126 }
bbb921da 1127 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1128 if (sm->group->reject_4way_hs_for_entropy) {
1129 /*
1130 * The system did not have enough entropy to generate
1131 * strong random numbers. Reject the first 4-way
1132 * handshake(s) and collect some entropy based on the
1133 * information from it. Once enough entropy is
1134 * available, the next atempt will trigger GMK/Key
1135 * Counter update and the station will be allowed to
1136 * continue.
1137 */
1138 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1139 "collect more entropy for random number "
1140 "generation");
08704cd8 1141 random_mark_pool_ready();
567da5bb
JM		 1142 wpa_sta_disconnect(wpa_auth, sm->addr,
1143 WLAN_REASON_PREV_AUTH_NOT_VALID);
08704cd8
JM		 1144 return;
1145 }
6fc6879b
JM		 1146 break;
1147 case PAIRWISE_4:
1148 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1149 !sm->PTK_valid) {
1150 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1151 "received EAPOL-Key msg 4/4 in "
1152 "invalid state (%d) - dropped",
1153 sm->wpa_ptk_state);
1154 return;
1155 }
1156 break;
1157 case GROUP_2:
1158 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1159 || !sm->PTK_valid) {
1160 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1161 "received EAPOL-Key msg 2/2 in "
1162 "invalid state (%d) - dropped",
1163 sm->wpa_ptk_group_state);
1164 return;
1165 }
1166 break;
6fc6879b
JM		 1167 case REQUEST:
1168 break;
1169 }
1170
1171 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1172 "received EAPOL-Key frame (%s)", msgtxt);
1173
1174 if (key_info & WPA_KEY_INFO_ACK) {
1175 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1176 "received invalid EAPOL-Key: Key Ack set");
1177 return;
1178 }
1179
b9866483
JM		 1180 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1181 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1182 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1183 "received invalid EAPOL-Key: Key MIC not set");
1184 return;
1185 }
1186
b9866483
JM		 1187#ifdef CONFIG_FILS
1188 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1189 (key_info & WPA_KEY_INFO_MIC)) {
1190 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1191 "received invalid EAPOL-Key: Key MIC set");
1192 return;
1193 }
1194#endif /* CONFIG_FILS */
1195
6fc6879b 1196 sm->MICVerified = FALSE;
68921e24 1197 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8 1198 if (mic_len &&
567da5bb
JM		 1199 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1200 data, data_len) &&
f23c5b17
JM		 1201 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1202 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1203 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1204 "received EAPOL-Key with invalid MIC");
1205 return;
1206 }
75c8563e
JM		 1207#ifdef CONFIG_FILS
1208 if (!mic_len &&
1209 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1210 &key_data_length) < 0) {
1211 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1212 "received EAPOL-Key with invalid MIC");
1213 return;
1214 }
1215#endif /* CONFIG_FILS */
6fc6879b
JM		 1216 sm->MICVerified = TRUE;
1217 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1218 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1219 }
1220
1221 if (key_info & WPA_KEY_INFO_REQUEST) {
1222 if (sm->MICVerified) {
1223 sm->req_replay_counter_used = 1;
1224 os_memcpy(sm->req_replay_counter, key->replay_counter,
1225 WPA_REPLAY_COUNTER_LEN);
1226 } else {
1227 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1228 "received EAPOL-Key request with "
1229 "invalid MIC");
1230 return;
1231 }
1232
1233 /*
1234 * TODO: should decrypt key data field if encryption was used;
1235 * even though MAC address KDE is not normally encrypted,
1236 * supplicant is allowed to encrypt it.
1237 */
a0bf1b68 1238 if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1239 if (wpa_receive_error_report(
1240 wpa_auth, sm,
1241 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1242 return; /* STA entry was removed */
6fc6879b
JM		 1243 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1244 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1245 "received EAPOL-Key Request for new "
1246 "4-Way Handshake");
1247 wpa_request_new_ptk(sm);
6fc6879b 1248 } else if (key_data_length > 0 &&
5e3b5197
JM		 1249 wpa_parse_kde_ies(key_data, key_data_length,
1250 &kde) == 0 &&
6fc6879b
JM		 1251 kde.mac_addr) {
1252 } else {
1253 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1254 "received EAPOL-Key Request for GTK "
1255 "rekeying");
6fc6879b
JM		 1256 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1257 wpa_rekey_gtk(wpa_auth, NULL);
1258 }
1259 } else {
68921e24
JM		 1260 /* Do not allow the same key replay counter to be reused. */
1261 wpa_replay_counter_mark_invalid(sm->key_replay,
1262 key->replay_counter);
1263
1264 if (msg == PAIRWISE_2) {
1265 /*
1266 * Maintain a copy of the pending EAPOL-Key frames in
1267 * case the EAPOL-Key frame was retransmitted. This is
1268 * needed to allow EAPOL-Key msg 2/4 reply to another
1269 * pending msg 1/4 to update the SNonce to work around
1270 * unexpected supplicant behavior.
1271 */
1272 os_memcpy(sm->prev_key_replay, sm->key_replay,
1273 sizeof(sm->key_replay));
1274 } else {
1275 os_memset(sm->prev_key_replay, 0,
1276 sizeof(sm->prev_key_replay));
1277 }
1278
1279 /*
1280 * Make sure old valid counters are not accepted anymore and
1281 * do not get copied again.
1282 */
1283 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1284 }
1285
6fc6879b 1286 os_free(sm->last_rx_eapol_key);
a1f11e34 1287 sm->last_rx_eapol_key = os_memdup(data, data_len);
6fc6879b
JM		 1288 if (sm->last_rx_eapol_key == NULL)
1289 return;
6fc6879b
JM		 1290 sm->last_rx_eapol_key_len = data_len;
1291
0d442aff 1292 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1293 sm->EAPOLKeyReceived = TRUE;
1294 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1295 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1296 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1297 wpa_sm_step(sm);
1298}
1299
1300
3c7302c2
JM		 1301static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1302 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1303{
c6eb3e34 1304 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN];
5cb9d5c3 1305 u8 *pos;
3c7302c2 1306 int ret = 0;
6fc6879b 1307
5cb9d5c3
JM		 1308 /* GTK = PRF-X(GMK, "Group key expansion",
1309 * AA || GNonce || Time || random data)
1310 * The example described in the IEEE 802.11 standard uses only AA and
1311 * GNonce as inputs here. Add some more entropy since this derivation
1312 * is done only at the Authenticator and as such, does not need to be
1313 * exactly same.
1314 */
c6eb3e34 1315 os_memset(data, 0, sizeof(data));
6fc6879b
JM		 1316 os_memcpy(data, addr, ETH_ALEN);
1317 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1318 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1319 wpa_get_ntp_timestamp(pos);
1320 pos += 8;
c6eb3e34 1321 if (random_get_bytes(pos, gtk_len) < 0)
3c7302c2 1322 ret = -1;
6fc6879b 1323
c6eb3e34
JM		 1324#ifdef CONFIG_SHA384
1325 if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1326 gtk, gtk_len) < 0)
3c7302c2 1327 ret = -1;
c6eb3e34
JM		 1328#else /* CONFIG_SHA384 */
1329#ifdef CONFIG_SHA256
1330 if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1331 gtk, gtk_len) < 0)
1332 ret = -1;
1333#else /* CONFIG_SHA256 */
1334 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1335 gtk, gtk_len) < 0)
1336 ret = -1;
1337#endif /* CONFIG_SHA256 */
1338#endif /* CONFIG_SHA384 */
3c7302c2
JM		 1339
1340 return ret;
6fc6879b
JM		 1341}
1342
1343
1344static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1345{
1346 struct wpa_authenticator *wpa_auth = eloop_ctx;
1347 struct wpa_state_machine *sm = timeout_ctx;
1348
e4bf4db9 1349 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1350 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1351 sm->TimeoutEvt = TRUE;
1352 wpa_sm_step(sm);
1353}
1354
1355
1356void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1357 struct wpa_state_machine *sm, int key_info,
1358 const u8 *key_rsc, const u8 *nonce,
1359 const u8 *kde, size_t kde_len,
1360 int keyidx, int encr, int force_version)
1361{
1362 struct ieee802_1x_hdr *hdr;
1363 struct wpa_eapol_key *key;
5e3b5197 1364 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1365 int alg;
1366 int key_data_len, pad_len = 0;
1367 u8 *buf, *pos;
1368 int version, pairwise;
22a299ee 1369 int i;
6d014ffc 1370 u8 *key_mic, *key_data;
6fc6879b 1371
567da5bb 1372 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 1373 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1374
1375 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1376
1377 if (force_version)
1378 version = force_version;
4bc801ab 1379 else if (wpa_use_akm_defined(sm->wpa_key_mgmt))
a14896e8 1380 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
4bc801ab 1381 else if (wpa_use_cmac(sm->wpa_key_mgmt))
6fc6879b 1382 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1383 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1384 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1385 else
1386 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1387
8543ed8a 1388 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1389
1390 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1391 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1392 "encr=%d)",
1393 version,
1394 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1395 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1396 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1397 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1398 pairwise, (unsigned long) kde_len, keyidx, encr);
1399
1400 key_data_len = kde_len;
1401
1402 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1403 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1404 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1405 pad_len = key_data_len % 8;
1406 if (pad_len)
1407 pad_len = 8 - pad_len;
1408 key_data_len += pad_len + 8;
1409 }
1410
1411 len += key_data_len;
b729fd8d
JM		 1412 if (!mic_len && encr)
1413 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1414
1415 hdr = os_zalloc(len);
1416 if (hdr == NULL)
1417 return;
1418 hdr->version = wpa_auth->conf.eapol_version;
1419 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1420 hdr->length = host_to_be16(len - sizeof(*hdr));
1421 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1422 key_mic = (u8 *) (key + 1);
5e3b5197 1423 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1424
1425 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1426 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1427 key_info |= version;
1428 if (encr && sm->wpa == WPA_VERSION_WPA2)
1429 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1430 if (sm->wpa != WPA_VERSION_WPA2)
1431 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1432 WPA_PUT_BE16(key->key_info, key_info);
1433
1434 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
a0bf1b68 1435 if (sm->wpa == WPA_VERSION_WPA2 && !pairwise)
6fc6879b 1436 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1437 else
1438 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b 1439
22a299ee
JM		 1440 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1441 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1442 os_memcpy(sm->key_replay[i].counter,
1443 sm->key_replay[i - 1].counter,
1444 WPA_REPLAY_COUNTER_LEN);
1445 }
1446 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1447 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1448 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1449 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1450 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1451 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1452
1453 if (nonce)
1454 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1455
1456 if (key_rsc)
1457 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1458
1459 if (kde && !encr) {
5e3b5197 1460 os_memcpy(key_data, kde, kde_len);
6d014ffc 1461 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d 1462#ifdef CONFIG_FILS
c05f96a3 1463 } else if (!mic_len && kde) {
b729fd8d
JM		 1464 const u8 *aad[1];
1465 size_t aad_len[1];
1466
1467 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1468 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1469 kde, kde_len);
1470
1471 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1472 sm->PTK.kek, sm->PTK.kek_len);
1473 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1474 * to Key Data (exclusive). */
1475 aad[0] = (u8 *) hdr;
1476 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1477 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1478 1, aad, aad_len, key_mic + 2) < 0) {
1479 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1480 return;
1481 }
1482
1483 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1484 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1485#endif /* CONFIG_FILS */
6fc6879b
JM		 1486 } else if (encr && kde) {
1487 buf = os_zalloc(key_data_len);
1488 if (buf == NULL) {
1489 os_free(hdr);
1490 return;
1491 }
1492 pos = buf;
1493 os_memcpy(pos, kde, kde_len);
1494 pos += kde_len;
1495
1496 if (pad_len)
1497 *pos++ = 0xdd;
1498
1499 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1500 buf, key_data_len);
1501 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1502 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b 1503 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
ef9627cb
JM		 1504 wpa_printf(MSG_DEBUG,
1505 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1506 (unsigned int) sm->PTK.kek_len);
98cd3d1c 1507 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1508 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1509 os_free(hdr);
1510 os_free(buf);
1511 return;
1512 }
6d014ffc 1513 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1514#ifndef CONFIG_NO_RC4
98cd3d1c 1515 } else if (sm->PTK.kek_len == 16) {
6fc6879b 1516 u8 ek[32];
ef9627cb
JM		 1517
1518 wpa_printf(MSG_DEBUG,
1519 "WPA: Encrypt Key Data using RC4");
6fc6879b
JM		 1520 os_memcpy(key->key_iv,
1521 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1522 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1523 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1524 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1525 os_memcpy(key_data, buf, key_data_len);
1526 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1527 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1528#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1529 } else {
1530 os_free(hdr);
1531 os_free(buf);
1532 return;
6fc6879b
JM		 1533 }
1534 os_free(buf);
1535 }
1536
1537 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1538 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1539 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1540 "PTK not valid when sending EAPOL-Key "
1541 "frame");
1542 os_free(hdr);
1543 return;
1544 }
5e3b5197 1545
beae255a
JM		 1546 if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1547 sm->wpa_key_mgmt, version,
1548 (u8 *) hdr, len, key_mic) < 0) {
1549 os_free(hdr);
1550 return;
1551 }
7af092a0
JB		 1552#ifdef CONFIG_TESTING_OPTIONS
1553 if (!pairwise &&
06df2aa6 1554 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1555 drand48() <
1556 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1557 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1558 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1559 key_mic[0]++;
7af092a0
JB		 1560 }
1561#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1562 }
1563
1564 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1565 1);
1566 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1567 sm->pairwise_set);
1568 os_free(hdr);
1569}
1570
1571
1572static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1573 struct wpa_state_machine *sm, int key_info,
1574 const u8 *key_rsc, const u8 *nonce,
1575 const u8 *kde, size_t kde_len,
1576 int keyidx, int encr)
1577{
1578 int timeout_ms;
1579 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1580 u32 ctr;
6fc6879b
JM		 1581
1582 if (sm == NULL)
1583 return;
1584
1585 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1586 keyidx, encr, 0);
1587
bae61562 1588 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1589 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1590 timeout_ms = pairwise ? eapol_key_timeout_first :
1591 eapol_key_timeout_first_group;
bae61562
JM		 1592 else
1593 timeout_ms = eapol_key_timeout_subseq;
6f234c1e
JM		 1594 if (wpa_auth->conf.wpa_disable_eapol_key_retries &&
1595 (!pairwise || (key_info & WPA_KEY_INFO_MIC)))
1596 timeout_ms = eapol_key_timeout_no_retrans;
e4bf4db9
JM		 1597 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1598 sm->pending_1_of_4_timeout = 1;
1599 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1600 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1601 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1602 wpa_send_eapol_timeout, wpa_auth, sm);
1603}
1604
1605
567da5bb
JM		 1606static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1607 u8 *data, size_t data_len)
6fc6879b
JM		 1608{
1609 struct ieee802_1x_hdr *hdr;
1610 struct wpa_eapol_key *key;
1611 u16 key_info;
1612 int ret = 0;
6d014ffc 1613 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
567da5bb 1614 size_t mic_len = wpa_mic_len(akmp, pmk_len);
6fc6879b
JM		 1615
1616 if (data_len < sizeof(*hdr) + sizeof(*key))
1617 return -1;
1618
1619 hdr = (struct ieee802_1x_hdr *) data;
1620 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1621 mic_pos = (u8 *) (key + 1);
6fc6879b 1622 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1623 os_memcpy(mic, mic_pos, mic_len);
1624 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1625 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1626 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1627 data, data_len, mic_pos) ||
1628 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1629 ret = -1;
6d014ffc 1630 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1631 return ret;
1632}
1633
1634
1635void wpa_remove_ptk(struct wpa_state_machine *sm)
1636{
1637 sm->PTK_valid = FALSE;
1638 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1639 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1640 0))
1641 wpa_printf(MSG_DEBUG,
1642 "RSN: PTK removal from the driver failed");
6fc6879b 1643 sm->pairwise_set = FALSE;
581a8cde 1644 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1645}
1646
1647
bb119228 1648int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1649{
5d22a1d5
JM		 1650 int remove_ptk = 1;
1651
6fc6879b 1652 if (sm == NULL)
6f9b5d16 1653 return -1;
6fc6879b
JM		 1654
1655 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1656 "event %d notification", event);
1657
1658 switch (event) {
1659 case WPA_AUTH:
c50d94f1
BC		 1660#ifdef CONFIG_MESH
1661 /* PTKs are derived through AMPE */
1662 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1663 /* not mesh */
1664 break;
1665 }
1666 return 0;
1667#endif /* CONFIG_MESH */
6fc6879b
JM		 1668 case WPA_ASSOC:
1669 break;
1670 case WPA_DEAUTH:
1671 case WPA_DISASSOC:
1672 sm->DeauthenticationRequest = TRUE;
1673 break;
1674 case WPA_REAUTH:
1675 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1676 if (!sm->started) {
1677 /*
1678 * When using WPS, we may end up here if the STA
1679 * manages to re-associate without the previous STA
1680 * entry getting removed. Consequently, we need to make
1681 * sure that the WPA state machines gets initialized
1682 * properly at this point.
1683 */
1684 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1685 "started - initialize now");
1686 sm->started = 1;
1687 sm->Init = TRUE;
1688 if (wpa_sm_step(sm) == 1)
1689 return 1; /* should not really happen */
1690 sm->Init = FALSE;
1691 sm->AuthenticationRequest = TRUE;
1692 break;
1693 }
9663596f
JM		 1694 if (sm->GUpdateStationKeys) {
1695 /*
1696 * Reauthentication cancels the pending group key
1697 * update for this STA.
1698 */
1699 sm->group->GKeyDoneStations--;
1700 sm->GUpdateStationKeys = FALSE;
1701 sm->PtkGroupInit = TRUE;
1702 }
6fc6879b
JM		 1703 sm->ReAuthenticationRequest = TRUE;
1704 break;
1705 case WPA_ASSOC_FT:
4ec1fd8e 1706#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1707 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1708 "after association");
1709 wpa_ft_install_ptk(sm);
1710
6fc6879b
JM		 1711 /* Using FT protocol, not WPA auth state machine */
1712 sm->ft_completed = 1;
6f9b5d16 1713 return 0;
4ec1fd8e 1714#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1715 break;
4ec1fd8e 1716#endif /* CONFIG_IEEE80211R_AP */
957bff83
JM		 1717 case WPA_ASSOC_FILS:
1718#ifdef CONFIG_FILS
1719 wpa_printf(MSG_DEBUG,
1720 "FILS: TK configuration after association");
1721 fils_set_tk(sm);
1722 sm->fils_completed = 1;
1723 return 0;
1724#else /* CONFIG_FILS */
1725 break;
1726#endif /* CONFIG_FILS */
0e3bd7ac
MV		 1727 case WPA_DRV_STA_REMOVED:
1728 sm->tk_already_set = FALSE;
1729 return 0;
6fc6879b
JM		 1730 }
1731
4ec1fd8e 1732#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1733 sm->ft_completed = 0;
4ec1fd8e 1734#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1735
5d22a1d5
JM		 1736#ifdef CONFIG_IEEE80211W
1737 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1738 remove_ptk = 0;
1739#endif /* CONFIG_IEEE80211W */
78815f3d 1740#ifdef CONFIG_FILS
da24c5aa
JM		 1741 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1742 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1743 remove_ptk = 0;
1744#endif /* CONFIG_FILS */
6fc6879b 1745
5d22a1d5
JM		 1746 if (remove_ptk) {
1747 sm->PTK_valid = FALSE;
1748 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1749
1750 if (event != WPA_REAUTH_EAPOL)
1751 wpa_remove_ptk(sm);
1752 }
6fc6879b 1753
43f49c37
JM		 1754 if (sm->in_step_loop) {
1755 /*
1756 * wpa_sm_step() is already running - avoid recursive call to
1757 * it by making the existing loop process the new update.
1758 */
1759 sm->changed = TRUE;
1760 return 0;
1761 }
6f9b5d16 1762 return wpa_sm_step(sm);
6fc6879b
JM		 1763}
1764
1765
6fc6879b
JM		 1766SM_STATE(WPA_PTK, INITIALIZE)
1767{
1768 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1769 if (sm->Init) {
1770 /* Init flag is not cleared here, so avoid busy
1771 * loop by claiming nothing changed. */
1772 sm->changed = FALSE;
1773 }
1774
1775 sm->keycount = 0;
1776 if (sm->GUpdateStationKeys)
1777 sm->group->GKeyDoneStations--;
1778 sm->GUpdateStationKeys = FALSE;
1779 if (sm->wpa == WPA_VERSION_WPA)
1780 sm->PInitAKeys = FALSE;
1781 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1782 * Local AA > Remote AA)) */) {
1783 sm->Pair = TRUE;
1784 }
1785 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1786 wpa_remove_ptk(sm);
1787 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1788 sm->TimeoutCtr = 0;
a1ea1b45 1789 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 1790 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 1791 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 1792 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1793 WPA_EAPOL_authorized, 0);
1794 }
1795}
1796
1797
1798SM_STATE(WPA_PTK, DISCONNECT)
1799{
567da5bb
JM		 1800 u16 reason = sm->disconnect_reason;
1801
6fc6879b
JM		 1802 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1803 sm->Disconnect = FALSE;
567da5bb
JM		 1804 sm->disconnect_reason = 0;
1805 if (!reason)
1806 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1807 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
6fc6879b
JM		 1808}
1809
1810
1811SM_STATE(WPA_PTK, DISCONNECTED)
1812{
1813 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1814 sm->DeauthenticationRequest = FALSE;
1815}
1816
1817
1818SM_STATE(WPA_PTK, AUTHENTICATION)
1819{
1820 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1821 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1822 sm->PTK_valid = FALSE;
1823 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1824 1);
1825 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1826 sm->AuthenticationRequest = FALSE;
1827}
1828
1829
40d00d2b
NC		 1830static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1831 struct wpa_group *group)
1bdb7ab3 1832{
40d00d2b
NC		 1833 if (group->first_sta_seen)
1834 return;
1bdb7ab3
JM		 1835 /*
1836 * System has run bit further than at the time hostapd was started
1837 * potentially very early during boot up. This provides better chances
1838 * of collecting more randomness on embedded systems. Re-initialize the
1839 * GMK and Counter here to improve their strength if there was not
1840 * enough entropy available immediately after system startup.
1841 */
1842 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1843 "station");
08704cd8
JM		 1844 if (random_pool_ready() != 1) {
1845 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1846 "to proceed - reject first 4-way handshake");
1847 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1848 } else {
1849 group->first_sta_seen = TRUE;
1850 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1851 }
40d00d2b 1852
aac1efec
JM		 1853 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1854 wpa_gtk_update(wpa_auth, group) < 0 ||
1855 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1856 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1857 group->first_sta_seen = FALSE;
1858 group->reject_4way_hs_for_entropy = TRUE;
1859 }
1bdb7ab3
JM		 1860}
1861
1862
6fc6879b
JM		 1863SM_STATE(WPA_PTK, AUTHENTICATION2)
1864{
1865 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1866
40d00d2b 1867 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1868 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1869
3825a19b
JM		 1870 /*
1871 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1872 * ambiguous. The Authenticator state machine uses a counter that is
1873 * incremented by one for each 4-way handshake. However, the security
1874 * analysis of 4-way handshake points out that unpredictable nonces
1875 * help in preventing precomputation attacks. Instead of the state
1876 * machine definition, use an unpredictable nonce value here to provide
1877 * stronger protection against potential precomputation attacks.
1878 */
1879 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1880 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1881 "ANonce.");
65a32cdb 1882 sm->Disconnect = TRUE;
3825a19b
JM		 1883 return;
1884 }
bc8318ac
JM		 1885 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1886 WPA_NONCE_LEN);
6fc6879b
JM		 1887 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1888 * logical place than INITIALIZE since AUTHENTICATION2 can be
1889 * re-entered on ReAuthenticationRequest without going through
1890 * INITIALIZE. */
1891 sm->TimeoutCtr = 0;
1892}
1893
1894
0adc9b28
JM		 1895static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1896{
1897 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1898 wpa_printf(MSG_ERROR,
1899 "WPA: Failed to get random data for ANonce");
1900 sm->Disconnect = TRUE;
1901 return -1;
1902 }
1903 wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1904 WPA_NONCE_LEN);
1905 sm->TimeoutCtr = 0;
1906 return 0;
1907}
1908
1909
6fc6879b
JM		 1910SM_STATE(WPA_PTK, INITPMK)
1911{
1912 u8 msk[2 * PMK_LEN];
1913 size_t len = 2 * PMK_LEN;
1914
1915 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1916#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1917 sm->xxkey_len = 0;
4ec1fd8e 1918#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1919 if (sm->pmksa) {
1920 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1921 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1922 sm->pmk_len = sm->pmksa->pmk_len;
567da5bb
JM		 1923#ifdef CONFIG_DPP
1924 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
1925 wpa_printf(MSG_DEBUG,
1926 "DPP: No PMKSA cache entry for STA - reject connection");
1927 sm->Disconnect = TRUE;
1928 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
1929 return;
1930#endif /* CONFIG_DPP */
6fc6879b 1931 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1932 unsigned int pmk_len;
1933
834c5d68 1934 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
207976f0
JM		 1935 pmk_len = PMK_LEN_SUITE_B_192;
1936 else
1937 pmk_len = PMK_LEN;
6fc6879b 1938 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1939 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1940 pmk_len);
1941 if (len < pmk_len) {
1942 wpa_printf(MSG_DEBUG,
1943 "WPA: MSK not long enough (%u) to create PMK (%u)",
1944 (unsigned int) len, (unsigned int) pmk_len);
1945 sm->Disconnect = TRUE;
1946 return;
1947 }
1948 os_memcpy(sm->PMK, msk, pmk_len);
1949 sm->pmk_len = pmk_len;
4ec1fd8e 1950#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1951 if (len >= 2 * PMK_LEN) {
9f12271b
JM		 1952 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
1953 os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN);
1954 sm->xxkey_len = SHA384_MAC_LEN;
1955 } else {
1956 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1957 sm->xxkey_len = PMK_LEN;
1958 }
6fc6879b 1959 }
4ec1fd8e 1960#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1961 } else {
400de9b1 1962 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 1963 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 1964 sm->Disconnect = TRUE;
1965 return;
6fc6879b 1966 }
40aaa64f 1967 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 1968
1969 sm->req_replay_counter_used = 0;
1970 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1971 * will break reauthentication since EAPOL state machines may not be
1972 * get into AUTHENTICATING state that clears keyRun before WPA state
1973 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1974 * state and takes PMK from the previously used AAA Key. This will
1975 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1976 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1977 * be good workaround for this issue. */
1978 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1979}
1980
1981
1982SM_STATE(WPA_PTK, INITPSK)
1983{
1984 const u8 *psk;
7a12edd1
JM		 1985 size_t psk_len;
1986
6fc6879b 1987 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
7a12edd1
JM		 1988 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
1989 &psk_len);
6fc6879b 1990 if (psk) {
7a12edd1
JM		 1991 os_memcpy(sm->PMK, psk, psk_len);
1992 sm->pmk_len = psk_len;
4ec1fd8e 1993#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 1994 os_memcpy(sm->xxkey, psk, PMK_LEN);
1995 sm->xxkey_len = PMK_LEN;
4ec1fd8e 1996#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1997 }
e61fea6b
JM		 1998#ifdef CONFIG_SAE
1999 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2000 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2001 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2002 sm->pmk_len = sm->pmksa->pmk_len;
2003 }
2004#endif /* CONFIG_SAE */
6fc6879b
JM		 2005 sm->req_replay_counter_used = 0;
2006}
2007
2008
2009SM_STATE(WPA_PTK, PTKSTART)
2010{
2011 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2012 size_t pmkid_len = 0;
2013
2014 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2015 sm->PTKRequest = FALSE;
2016 sm->TimeoutEvt = FALSE;
f23c5b17 2017 sm->alt_snonce_valid = FALSE;
bae61562
JM		 2018
2019 sm->TimeoutCtr++;
41f140d3 2020 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2021 /* No point in sending the EAPOL-Key - we will disconnect
2022 * immediately following this. */
2023 return;
2024 }
2025
6fc6879b
JM		 2026 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2027 "sending 1/4 msg of 4-Way Handshake");
2028 /*
c6e1a9a0
JM		 2029 * For infrastructure BSS cases, it is better for the AP not to include
2030 * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate
2031 * offline search for the passphrase/PSK without having to be able to
2032 * capture a 4-way handshake from a STA that has access to the network.
2033 *
2034 * For IBSS cases, addition of PMKID KDE could be considered even with
2035 * WPA2-PSK cases that use multiple PSKs, but only if there is a single
2036 * possible PSK for this STA. However, this should not be done unless
2037 * there is support for using that information on the supplicant side.
2038 * The concern about exposing PMKID unnecessarily in infrastructure BSS
2039 * cases would also apply here, but at least in the IBSS case, this
2040 * would cover a potential real use case.
6fc6879b
JM		 2041 */
2042 if (sm->wpa == WPA_VERSION_WPA2 &&
e61fea6b 2043 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
d90f10fa 2044 (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
e61fea6b 2045 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
a14896e8 2046 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2047 pmkid = buf;
2048 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2049 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2050 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2051 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2052 if (sm->pmksa) {
9d94e4bb
JM		 2053 wpa_hexdump(MSG_DEBUG,
2054 "RSN: Message 1/4 PMKID from PMKSA entry",
2055 sm->pmksa->pmkid, PMKID_LEN);
6fc6879b
JM		 2056 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2057 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2058 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2059 /* No KCK available to derive PMKID */
9d94e4bb
JM		 2060 wpa_printf(MSG_DEBUG,
2061 "RSN: No KCK available to derive PMKID for message 1/4");
929a2ea5 2062 pmkid = NULL;
9d94e4bb
JM		 2063#ifdef CONFIG_SAE
2064 } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2065 if (sm->pmkid_set) {
2066 wpa_hexdump(MSG_DEBUG,
2067 "RSN: Message 1/4 PMKID from SAE",
2068 sm->pmkid, PMKID_LEN);
2069 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2070 sm->pmkid, PMKID_LEN);
2071 } else {
2072 /* No PMKID available */
2073 wpa_printf(MSG_DEBUG,
2074 "RSN: No SAE PMKID available for message 1/4");
2075 pmkid = NULL;
2076 }
2077#endif /* CONFIG_SAE */
929a2ea5 2078 } else {
6fc6879b
JM		 2079 /*
2080 * Calculate PMKID since no PMKSA cache entry was
2081 * available with pre-calculated PMKID.
2082 */
207976f0 2083 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197 2084 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
41b81914 2085 sm->wpa_key_mgmt);
9d94e4bb
JM		 2086 wpa_hexdump(MSG_DEBUG,
2087 "RSN: Message 1/4 PMKID derived from PMK",
2088 &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN);
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 2115 size_t pmk_len, const u8 *snonce, const u8 *anonce,
4cada9dc 2116 const u8 *dhss, size_t dhss_len,
80ddf5d9 2117 struct wpabuf *g_sta, struct wpabuf *g_ap)
c4fd6d8a
JM		 2118{
2119 u8 ick[FILS_ICK_MAX_LEN];
2120 size_t ick_len;
2121 int res;
8fed47e0
JM		 2122 u8 fils_ft[FILS_FT_MAX_LEN];
2123 size_t fils_ft_len = 0;
c4fd6d8a
JM		 2124
2125 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
4cada9dc
JM		 2126 snonce, anonce, dhss, dhss_len,
2127 &sm->PTK, ick, &ick_len,
8fed47e0
JM		 2128 sm->wpa_key_mgmt, sm->pairwise,
2129 fils_ft, &fils_ft_len);
c4fd6d8a
JM		 2130 if (res < 0)
2131 return res;
2132 sm->PTK_valid = TRUE;
2f1357fb 2133 sm->tk_already_set = FALSE;
c4fd6d8a 2134
8fed47e0
JM		 2135#ifdef CONFIG_IEEE80211R_AP
2136 if (fils_ft_len) {
2137 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2138 struct wpa_auth_config *conf = &wpa_auth->conf;
994eac7e
JM		 2139 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2140 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2141 size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
8fed47e0
JM		 2142
2143 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2144 conf->ssid, conf->ssid_len,
2145 conf->mobility_domain,
2146 conf->r0_key_holder,
2147 conf->r0_key_holder_len,
994eac7e
JM		 2148 sm->addr, pmk_r0, pmk_r0_name,
2149 use_sha384) < 0)
8fed47e0
JM		 2150 return -1;
2151
994eac7e
JM		 2152 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
2153 pmk_r0, pmk_r0_len);
8fed47e0
JM		 2154 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2155 pmk_r0_name, WPA_PMK_NAME_LEN);
89dea17e 2156 wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name);
8fed47e0
JM		 2157 os_memset(fils_ft, 0, sizeof(fils_ft));
2158 }
2159#endif /* CONFIG_IEEE80211R_AP */
2160
c4fd6d8a
JM		 2161 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2162 sm->addr, sm->wpa_auth->addr,
80ddf5d9
JM		 2163 g_sta ? wpabuf_head(g_sta) : NULL,
2164 g_sta ? wpabuf_len(g_sta) : 0,
2165 g_ap ? wpabuf_head(g_ap) : NULL,
2166 g_ap ? wpabuf_len(g_ap) : 0,
c4fd6d8a
JM		 2167 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2168 sm->fils_key_auth_ap,
2169 &sm->fils_key_auth_len);
2170 os_memset(ick, 0, sizeof(ick));
78815f3d
JM		 2171
2172 /* Store nonces for (Re)Association Request/Response frame processing */
2173 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2174 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2175
c4fd6d8a
JM		 2176 return res;
2177}
2178
2179
3b5b7aa8 2180static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2181 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2182{
2183 struct ieee802_1x_hdr *hdr;
2184 struct wpa_eapol_key *key;
2185 u8 *pos;
2186 u16 key_data_len;
2187 u8 *tmp;
2188 const u8 *aad[1];
2189 size_t aad_len[1];
2190
75c8563e 2191 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2192 key = (struct wpa_eapol_key *) (hdr + 1);
2193 pos = (u8 *) (key + 1);
2194 key_data_len = WPA_GET_BE16(pos);
2195 if (key_data_len < AES_BLOCK_SIZE ||
2196 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2197 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2198 "No room for AES-SIV data in the frame");
2199 return -1;
2200 }
2201 pos += 2; /* Pointing at the Encrypted Key Data field */
2202
2203 tmp = os_malloc(key_data_len);
2204 if (!tmp)
2205 return -1;
2206
2207 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2208 * to Key Data (exclusive). */
75c8563e
JM		 2209 aad[0] = buf;
2210 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2211 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2212 1, aad, aad_len, tmp) < 0) {
2213 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2214 "Invalid AES-SIV data in the frame");
2215 bin_clear_free(tmp, key_data_len);
2216 return -1;
2217 }
2218
2219 /* AEAD decryption and validation completed successfully */
2220 key_data_len -= AES_BLOCK_SIZE;
2221 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2222 tmp, key_data_len);
2223
2224 /* Replace Key Data field with the decrypted version */
2225 os_memcpy(pos, tmp, key_data_len);
2226 pos -= 2; /* Key Data Length field */
2227 WPA_PUT_BE16(pos, key_data_len);
2228 bin_clear_free(tmp, key_data_len);
2229 if (_key_data_len)
2230 *_key_data_len = key_data_len;
2231 return 0;
2232}
78815f3d
JM		 2233
2234
087631b9
JM		 2235const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2236 const u8 *ies, size_t ies_len,
2237 const u8 *fils_session)
2238{
2239 const u8 *ie, *end;
2240 const u8 *session = NULL;
2241
2242 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2243 wpa_printf(MSG_DEBUG,
2244 "FILS: Not a FILS AKM - reject association");
2245 return NULL;
2246 }
2247
2248 /* Verify Session element */
2249 ie = ies;
2250 end = ((const u8 *) ie) + ies_len;
2251 while (ie + 1 < end) {
2252 if (ie + 2 + ie[1] > end)
2253 break;
2254 if (ie[0] == WLAN_EID_EXTENSION &&
2255 ie[1] >= 1 + FILS_SESSION_LEN &&
2256 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2257 session = ie;
2258 break;
2259 }
2260 ie += 2 + ie[1];
2261 }
2262
2263 if (!session) {
2264 wpa_printf(MSG_DEBUG,
2265 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2266 __func__);
2267 return NULL;
2268 }
2269
2270 if (!fils_session) {
2271 wpa_printf(MSG_DEBUG,
2272 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2273 __func__);
2274 return NULL;
2275 }
2276
2277 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2278 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2279 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2280 fils_session, FILS_SESSION_LEN);
2281 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2282 session + 3, FILS_SESSION_LEN);
2283 return NULL;
2284 }
2285 return session;
2286}
2287
2288
bd599353
JM		 2289int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2290 size_t ies_len)
2291{
2292 struct ieee802_11_elems elems;
2293
2294 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2295 wpa_printf(MSG_DEBUG,
2296 "FILS: Failed to parse decrypted elements");
2297 return -1;
2298 }
2299
8b5ddda5
JM		 2300 if (!elems.fils_session) {
2301 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2302 return -1;
2303 }
2304
bd599353
JM		 2305 if (!elems.fils_key_confirm) {
2306 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2307 return -1;
2308 }
2309
2310 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2311 wpa_printf(MSG_DEBUG,
2312 "FILS: Unexpected Key-Auth length %d (expected %d)",
2313 elems.fils_key_confirm_len,
2314 (int) sm->fils_key_auth_len);
2315 return -1;
2316 }
2317
2318 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2319 sm->fils_key_auth_len) != 0) {
2320 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2321 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2322 elems.fils_key_confirm, elems.fils_key_confirm_len);
2323 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2324 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2325 return -1;
2326 }
2327
2328 return 0;
2329}
2330
2331
78815f3d
JM		 2332int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2333 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2334 u8 *pos, size_t left)
2335{
2336 u16 fc, stype;
2337 const u8 *end, *ie_start, *ie, *session, *crypt;
78815f3d
JM		 2338 const u8 *aad[5];
2339 size_t aad_len[5];
2340
2341 if (!sm || !sm->PTK_valid) {
2342 wpa_printf(MSG_DEBUG,
2343 "FILS: No KEK to decrypt Assocication Request frame");
2344 return -1;
2345 }
2346
2347 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2348 wpa_printf(MSG_DEBUG,
2349 "FILS: Not a FILS AKM - reject association");
2350 return -1;
2351 }
2352
2353 end = ((const u8 *) mgmt) + frame_len;
2354 fc = le_to_host16(mgmt->frame_control);
2355 stype = WLAN_FC_GET_STYPE(fc);
2356 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2357 ie_start = mgmt->u.reassoc_req.variable;
2358 else
2359 ie_start = mgmt->u.assoc_req.variable;
2360 ie = ie_start;
2361
2362 /*
2363 * Find FILS Session element which is the last unencrypted element in
2364 * the frame.
2365 */
087631b9
JM		 2366 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2367 fils_session);
78815f3d 2368 if (!session) {
087631b9 2369 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
78815f3d
JM		 2370 return -1;
2371 }
087631b9 2372
78815f3d
JM		 2373 crypt = session + 2 + session[1];
2374
2375 if (end - crypt < AES_BLOCK_SIZE) {
2376 wpa_printf(MSG_DEBUG,
2377 "FILS: Too short frame to include AES-SIV data");
2378 return -1;
2379 }
2380
2381 /* AES-SIV AAD vectors */
2382
2383 /* The STA's MAC address */
2384 aad[0] = mgmt->sa;
2385 aad_len[0] = ETH_ALEN;
2386 /* The AP's BSSID */
2387 aad[1] = mgmt->da;
2388 aad_len[1] = ETH_ALEN;
2389 /* The STA's nonce */
2390 aad[2] = sm->SNonce;
2391 aad_len[2] = FILS_NONCE_LEN;
2392 /* The AP's nonce */
2393 aad[3] = sm->ANonce;
2394 aad_len[3] = FILS_NONCE_LEN;
2395 /*
2396 * The (Re)Association Request frame from the Capability Information
2397 * field to the FILS Session element (both inclusive).
2398 */
2399 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2400 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2401
2402 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2403 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2404 wpa_printf(MSG_DEBUG,
2405 "FILS: Invalid AES-SIV data in the frame");
2406 return -1;
2407 }
2408 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2409 pos, left - AES_BLOCK_SIZE);
2410
bd599353
JM		 2411 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2412 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
78815f3d
JM		 2413 return -1;
2414 }
2415
2416 return left - AES_BLOCK_SIZE;
2417}
2418
e73ffa09
JM		 2419
2420int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2421 size_t current_len, size_t max_len,
2422 const struct wpabuf *hlp)
e73ffa09
JM		 2423{
2424 u8 *end = buf + max_len;
2425 u8 *pos = buf + current_len;
2426 struct ieee80211_mgmt *mgmt;
2427 struct wpabuf *plain;
e73ffa09
JM		 2428 const u8 *aad[5];
2429 size_t aad_len[5];
2430
2431 if (!sm || !sm->PTK_valid)
2432 return -1;
2433
2434 wpa_hexdump(MSG_DEBUG,
2435 "FILS: Association Response frame before FILS processing",
2436 buf, current_len);
2437
2438 mgmt = (struct ieee80211_mgmt *) buf;
2439
2440 /* AES-SIV AAD vectors */
2441
2442 /* The AP's BSSID */
2443 aad[0] = mgmt->sa;
2444 aad_len[0] = ETH_ALEN;
2445 /* The STA's MAC address */
2446 aad[1] = mgmt->da;
2447 aad_len[1] = ETH_ALEN;
2448 /* The AP's nonce */
2449 aad[2] = sm->ANonce;
2450 aad_len[2] = FILS_NONCE_LEN;
2451 /* The STA's nonce */
2452 aad[3] = sm->SNonce;
2453 aad_len[3] = FILS_NONCE_LEN;
2454 /*
2455 * The (Re)Association Response frame from the Capability Information
2456 * field (the same offset in both Association and Reassociation
2457 * Response frames) to the FILS Session element (both inclusive).
2458 */
2459 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2460 aad_len[4] = pos - aad[4];
2461
2462 /* The following elements will be encrypted with AES-SIV */
9392859d
JM		 2463 plain = fils_prepare_plainbuf(sm, hlp);
2464 if (!plain) {
2465 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2466 return -1;
2467 }
2468
2469 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2470 wpa_printf(MSG_DEBUG,
2471 "FILS: Not enough room for FILS elements");
2472 wpabuf_free(plain);
2473 return -1;
2474 }
2475
2476 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2477 plain);
2478
2479 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2480 wpabuf_head(plain), wpabuf_len(plain),
2481 5, aad, aad_len, pos) < 0) {
2482 wpabuf_free(plain);
2483 return -1;
2484 }
2485
2486 wpa_hexdump(MSG_DEBUG,
2487 "FILS: Encrypted Association Response elements",
2488 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2489 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2490 wpabuf_free(plain);
2491
2492 sm->fils_completed = 1;
2493
2494 return current_len;
2495}
2496
2497
2498static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2499 const struct wpabuf *hlp)
2500{
2501 struct wpabuf *plain;
2502 u8 *len, *tmp, *tmp2;
2503 u8 hdr[2];
2504 u8 *gtk, dummy_gtk[32];
2505 size_t gtk_len;
2506 struct wpa_group *gsm;
e73ffa09
JM		 2507
2508 plain = wpabuf_alloc(1000);
2509 if (!plain)
9392859d 2510 return NULL;
e73ffa09
JM		 2511
2512 /* TODO: FILS Public Key */
2513
2514 /* FILS Key Confirmation */
2515 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2516 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2517 /* Element ID Extension */
2518 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2519 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2520
91d91abf
JM		 2521 /* FILS HLP Container */
2522 if (hlp)
2523 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2524
2525 /* TODO: FILS IP Address Assignment */
2526
2527 /* Key Delivery */
2528 gsm = sm->group;
2529 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2530 len = wpabuf_put(plain, 1);
2531 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2532 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2533 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2534 /* GTK KDE */
2535 gtk = gsm->GTK[gsm->GN - 1];
2536 gtk_len = gsm->GTK_len;
8d660a4b
JM		 2537 if (sm->wpa_auth->conf.disable_gtk ||
2538 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
e73ffa09
JM		 2539 /*
2540 * Provide unique random GTK to each STA to prevent use
2541 * of GTK in the BSS.
2542 */
2543 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2544 wpabuf_free(plain);
9392859d 2545 return NULL;
e73ffa09
JM		 2546 }
2547 gtk = dummy_gtk;
2548 }
2549 hdr[0] = gsm->GN & 0x03;
2550 hdr[1] = 0;
2551 tmp = wpabuf_put(plain, 0);
2552 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2553 gtk, gtk_len);
2554 wpabuf_put(plain, tmp2 - tmp);
2555
2556 /* IGTK KDE */
2557 tmp = wpabuf_put(plain, 0);
2558 tmp2 = ieee80211w_kde_add(sm, tmp);
2559 wpabuf_put(plain, tmp2 - tmp);
2560
2561 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
9392859d 2562 return plain;
e73ffa09
JM		 2563}
2564
da24c5aa
JM		 2565
2566int fils_set_tk(struct wpa_state_machine *sm)
2567{
2568 enum wpa_alg alg;
2569 int klen;
2570
2f1357fb
JM		 2571 if (!sm || !sm->PTK_valid) {
2572 wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK");
2573 return -1;
2574 }
2575 if (sm->tk_already_set) {
2576 wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver");
da24c5aa 2577 return -1;
2f1357fb 2578 }
da24c5aa
JM		 2579
2580 alg = wpa_cipher_to_alg(sm->pairwise);
2581 klen = wpa_cipher_key_len(sm->pairwise);
2582
2583 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2584 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2585 sm->PTK.tk, klen)) {
2586 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2587 return -1;
2588 }
2f1357fb 2589 sm->tk_already_set = TRUE;
da24c5aa
JM		 2590
2591 return 0;
2592}
2593
fa61bff6
JM		 2594
2595u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
8b5ddda5 2596 const u8 *fils_session, struct wpabuf *hlp)
fa61bff6
JM		 2597{
2598 struct wpabuf *plain;
2599 u8 *pos = buf;
2600
2601 /* FILS Session */
2602 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2603 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2604 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2605 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2606 pos += FILS_SESSION_LEN;
2607
8b5ddda5 2608 plain = fils_prepare_plainbuf(sm, hlp);
fa61bff6
JM		 2609 if (!plain) {
2610 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2611 return NULL;
2612 }
2613
2614 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2615 pos += wpabuf_len(plain);
2616
2617 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2618 (unsigned int) wpabuf_len(plain));
2619 wpabuf_free(plain);
2620 sm->fils_completed = 1;
2621 return pos;
2622}
2623
3b5b7aa8
JM		 2624#endif /* CONFIG_FILS */
2625
2626
6fc6879b
JM		 2627SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2628{
3b5b7aa8 2629 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2630 struct wpa_ptk PTK;
2c502460 2631 int ok = 0, psk_found = 0;
6fc6879b 2632 const u8 *pmk = NULL;
7a12edd1 2633 size_t pmk_len;
3b5b7aa8
JM		 2634 int ft;
2635 const u8 *eapol_key_ie, *key_data, *mic;
2636 u16 key_data_length;
2637 size_t mic_len, eapol_key_ie_len;
2638 struct ieee802_1x_hdr *hdr;
2639 struct wpa_eapol_key *key;
2640 struct wpa_eapol_ie_parse kde;
6fc6879b
JM		 2641
2642 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2643 sm->EAPOLKeyReceived = FALSE;
68921e24 2644 sm->update_snonce = FALSE;
b729fd8d 2645 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2646
567da5bb 2647 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3b5b7aa8 2648
6fc6879b
JM		 2649 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2650 * WPA-PSK: iterate through possible PSKs and select the one matching
2651 * the packet */
2652 for (;;) {
e61fea6b
JM		 2653 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2654 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
759fd76b 2655 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
7a12edd1 2656 sm->p2p_dev_addr, pmk, &pmk_len);
6fc6879b
JM		 2657 if (pmk == NULL)
2658 break;
2c502460 2659 psk_found = 1;
f9854c18
MK		 2660#ifdef CONFIG_IEEE80211R_AP
2661 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2662 os_memcpy(sm->xxkey, pmk, pmk_len);
2663 sm->xxkey_len = pmk_len;
2664 }
2665#endif /* CONFIG_IEEE80211R_AP */
207976f0 2666 } else {
6fc6879b 2667 pmk = sm->PMK;
207976f0
JM		 2668 pmk_len = sm->pmk_len;
2669 }
6fc6879b 2670
364c064a
JM		 2671 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2672 break;
6fc6879b 2673
3b5b7aa8 2674 if (mic_len &&
567da5bb 2675 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
929a2ea5 2676 sm->last_rx_eapol_key,
6fc6879b
JM		 2677 sm->last_rx_eapol_key_len) == 0) {
2678 ok = 1;
2679 break;
2680 }
2681
3b5b7aa8 2682#ifdef CONFIG_FILS
75c8563e
JM		 2683 if (!mic_len &&
2684 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2685 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2686 ok = 1;
2687 break;
2688 }
2689#endif /* CONFIG_FILS */
2690
f5e0a332
JM		 2691 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
2692 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
6fc6879b
JM		 2693 break;
2694 }
2695
2696 if (!ok) {
2697 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2698 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2699 if (psk_found)
2700 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2701 return;
2702 }
2703
3b5b7aa8
JM		 2704 /*
2705 * Note: last_rx_eapol_key length fields have already been validated in
2706 * wpa_receive().
2707 */
2708 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2709 key = (struct wpa_eapol_key *) (hdr + 1);
2710 mic = (u8 *) (key + 1);
2711 key_data = mic + mic_len + 2;
2712 key_data_length = WPA_GET_BE16(mic + mic_len);
2713 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2714 sizeof(*key) - mic_len - 2)
2715 return;
2716
2717 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2718 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2719 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2720 return;
2721 }
2722 if (kde.rsn_ie) {
2723 eapol_key_ie = kde.rsn_ie;
2724 eapol_key_ie_len = kde.rsn_ie_len;
2725 } else if (kde.osen) {
2726 eapol_key_ie = kde.osen;
2727 eapol_key_ie_len = kde.osen_len;
2728 } else {
2729 eapol_key_ie = kde.wpa_ie;
2730 eapol_key_ie_len = kde.wpa_ie_len;
2731 }
2732 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2733 if (sm->wpa_ie == NULL ||
2734 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2735 eapol_key_ie, eapol_key_ie_len)) {
2736 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2737 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2738 if (sm->wpa_ie) {
2739 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2740 sm->wpa_ie, sm->wpa_ie_len);
2741 }
2742 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2743 eapol_key_ie, eapol_key_ie_len);
2744 /* MLME-DEAUTHENTICATE.request */
567da5bb
JM		 2745 wpa_sta_disconnect(wpa_auth, sm->addr,
2746 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2747 return;
2748 }
4ec1fd8e 2749#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8 2750 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
567da5bb
JM		 2751 wpa_sta_disconnect(wpa_auth, sm->addr,
2752 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2753 return;
2754 }
4ec1fd8e 2755#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2756#ifdef CONFIG_P2P
2757 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2758 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2759 int idx;
2760 wpa_printf(MSG_DEBUG,
2761 "P2P: IP address requested in EAPOL-Key exchange");
2762 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2763 if (idx >= 0) {
2764 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2765 bitfield_set(wpa_auth->ip_pool, idx);
2766 WPA_PUT_BE32(sm->ip_addr, start + idx);
2767 wpa_printf(MSG_DEBUG,
2768 "P2P: Assigned IP address %u.%u.%u.%u to "
2769 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2770 sm->ip_addr[2], sm->ip_addr[3],
2771 MAC2STR(sm->addr));
2772 }
2773 }
2774#endif /* CONFIG_P2P */
2775
4ec1fd8e 2776#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2777 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2778 /*
2779 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2780 * with the value we derived.
2781 */
870834a1
JM		 2782 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2783 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2784 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2785 "PMKR1Name mismatch in FT 4-way "
2786 "handshake");
2787 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2788 "Supplicant",
2789 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2790 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2791 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2792 return;
2793 }
2794 }
4ec1fd8e 2795#endif /* CONFIG_IEEE80211R_AP */
26e23750 2796
e4bf4db9 2797 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2798 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2799
56586197 2800 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2801 /* PSK may have changed from the previous choice, so update
2802 * state machine data based on whatever PSK was selected here.
2803 */
2804 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2805 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2806 }
2807
2808 sm->MICVerified = TRUE;
2809
2810 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2811 sm->PTK_valid = TRUE;
2812}
2813
2814
2815SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2816{
2817 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2818 sm->TimeoutCtr = 0;
2819}
2820
2821
2822#ifdef CONFIG_IEEE80211W
2823
2824static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2825{
2826 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2827 size_t len;
2828 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2829 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2830 }
2831
2832 return 0;
2833}
2834
2835
2836static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2837{
2838 struct wpa_igtk_kde igtk;
2839 struct wpa_group *gsm = sm->group;
03610ad2 2840 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 2841 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 2842
2843 if (!sm->mgmt_frame_prot)
2844 return pos;
2845
2846 igtk.keyid[0] = gsm->GN_igtk;
2847 igtk.keyid[1] = 0;
7b1080da 2848 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 2849 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 2850 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 2851 else
2852 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 2853 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
8d660a4b
JM		 2854 if (sm->wpa_auth->conf.disable_gtk ||
2855 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 2856 /*
2857 * Provide unique random IGTK to each STA to prevent use of
2858 * IGTK in the BSS.
2859 */
8dd9f9cd 2860 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 2861 return pos;
2862 }
6fc6879b 2863 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 2864 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2865 NULL, 0);
6fc6879b
JM		 2866
2867 return pos;
2868}
2869
2870#else /* CONFIG_IEEE80211W */
2871
2872static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2873{
2874 return 0;
2875}
2876
2877
2878static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2879{
2880 return pos;
2881}
2882
2883#endif /* CONFIG_IEEE80211W */
2884
2885
2886SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2887{
83421850 2888 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 2889 size_t gtk_len, kde_len;
2890 struct wpa_group *gsm = sm->group;
2891 u8 *wpa_ie;
2892 int wpa_ie_len, secure, keyidx, encr = 0;
2893
2894 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2895 sm->TimeoutEvt = FALSE;
bae61562
JM		 2896
2897 sm->TimeoutCtr++;
6f234c1e
JM		 2898 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
2899 sm->TimeoutCtr > 1) {
2900 /* Do not allow retransmission of EAPOL-Key msg 3/4 */
2901 return;
2902 }
41f140d3 2903 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2904 /* No point in sending the EAPOL-Key - we will disconnect
2905 * immediately following this. */
2906 return;
2907 }
2908
86dfabb8
JM		 2909 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2910 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2911 */
2912 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2913 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2914 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2915 wpa_ie = sm->wpa_auth->wpa_ie;
2916 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2917 if (sm->wpa == WPA_VERSION_WPA &&
2918 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2919 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 2920 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 2921 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 2922 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2923 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 2924 wpa_ie_len = wpa_ie[1] + 2;
2925 }
2926 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2927 "sending 3/4 msg of 4-Way Handshake");
2928 if (sm->wpa == WPA_VERSION_WPA2) {
2929 /* WPA2 send GTK in the 4-way handshake */
2930 secure = 1;
2931 gtk = gsm->GTK[gsm->GN - 1];
2932 gtk_len = gsm->GTK_len;
8d660a4b
JM		 2933 if (sm->wpa_auth->conf.disable_gtk ||
2934 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 2935 /*
2936 * Provide unique random GTK to each STA to prevent use
2937 * of GTK in the BSS.
2938 */
2939 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2940 return;
2941 gtk = dummy_gtk;
2942 }
6fc6879b
JM		 2943 keyidx = gsm->GN;
2944 _rsc = rsc;
2945 encr = 1;
2946 } else {
2947 /* WPA does not include GTK in msg 3/4 */
2948 secure = 0;
2949 gtk = NULL;
2950 gtk_len = 0;
2951 keyidx = 0;
2952 _rsc = NULL;
0d442aff
JM		 2953 if (sm->rx_eapol_key_secure) {
2954 /*
2955 * It looks like Windows 7 supplicant tries to use
2956 * Secure bit in msg 2/4 after having reported Michael
2957 * MIC failure and it then rejects the 4-way handshake
2958 * if msg 3/4 does not set Secure bit. Work around this
2959 * by setting the Secure bit here even in the case of
2960 * WPA if the supplicant used it first.
2961 */
2962 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2963 "STA used Secure bit in WPA msg 2/4 - "
2964 "set Secure for 3/4 as workaround");
0d442aff
JM		 2965 secure = 1;
2966 }
6fc6879b
JM		 2967 }
2968
2969 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2970 if (gtk)
2971 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 2972#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2973 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2974 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2975 kde_len += 300; /* FTIE + 2 * TIE */
2976 }
4ec1fd8e 2977#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 2978#ifdef CONFIG_P2P
2979 if (WPA_GET_BE32(sm->ip_addr) > 0)
2980 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2981#endif /* CONFIG_P2P */
6fc6879b
JM		 2982 kde = os_malloc(kde_len);
2983 if (kde == NULL)
2984 return;
2985
2986 pos = kde;
2987 os_memcpy(pos, wpa_ie, wpa_ie_len);
2988 pos += wpa_ie_len;
4ec1fd8e 2989#ifdef CONFIG_IEEE80211R_AP
26e23750 2990 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 2991 int res;
2992 size_t elen;
2993
2994 elen = pos - kde;
2995 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 2996 if (res < 0) {
2997 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2998 "PMKR1Name into RSN IE in EAPOL-Key data");
2999 os_free(kde);
3000 return;
3001 }
59e78c24
JM		 3002 pos -= wpa_ie_len;
3003 pos += elen;
26e23750 3004 }
4ec1fd8e 3005#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3006 if (gtk) {
3007 u8 hdr[2];
3008 hdr[0] = keyidx & 0x03;
3009 hdr[1] = 0;
3010 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3011 gtk, gtk_len);
3012 }
3013 pos = ieee80211w_kde_add(sm, pos);
3014
4ec1fd8e 3015#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 3016 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3017 int res;
3018 struct wpa_auth_config *conf;
3019
3020 conf = &sm->wpa_auth->conf;
9257610a
JM		 3021 if (sm->assoc_resp_ftie &&
3022 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
3023 os_memcpy(pos, sm->assoc_resp_ftie,
3024 2 + sm->assoc_resp_ftie[1]);
3025 res = 2 + sm->assoc_resp_ftie[1];
3026 } else {
a7968ea5
JM		 3027 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3028
3029 res = wpa_write_ftie(conf, use_sha384,
3030 conf->r0_key_holder,
9257610a
JM		 3031 conf->r0_key_holder_len,
3032 NULL, NULL, pos,
3033 kde + kde_len - pos,
3034 NULL, 0);
3035 }
86dfabb8
JM		 3036 if (res < 0) {
3037 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3038 "into EAPOL-Key Key Data");
3039 os_free(kde);
3040 return;
3041 }
3042 pos += res;
3043
3044 /* TIE[ReassociationDeadline] (TU) */
3045 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3046 *pos++ = 5;
3047 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3048 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3049 pos += 4;
3050
3051 /* TIE[KeyLifetime] (seconds) */
3052 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3053 *pos++ = 5;
3054 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 3055 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
86dfabb8
JM		 3056 pos += 4;
3057 }
4ec1fd8e 3058#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3059#ifdef CONFIG_P2P
3060 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3061 u8 addr[3 * 4];
3062 os_memcpy(addr, sm->ip_addr, 4);
3063 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3064 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3065 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3066 addr, sizeof(addr), NULL, 0);
3067 }
3068#endif /* CONFIG_P2P */
86dfabb8 3069
6fc6879b 3070 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3071 (secure ? WPA_KEY_INFO_SECURE : 0) |
567da5bb
JM		 3072 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3073 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3074 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3075 WPA_KEY_INFO_KEY_TYPE,
3076 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3077 os_free(kde);
6fc6879b
JM		 3078}
3079
3080
3081SM_STATE(WPA_PTK, PTKINITDONE)
3082{
3083 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3084 sm->EAPOLKeyReceived = FALSE;
3085 if (sm->Pair) {
c3550295
JM		 3086 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3087 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 3088 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 3089 sm->PTK.tk, klen)) {
567da5bb
JM		 3090 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3091 WLAN_REASON_PREV_AUTH_NOT_VALID);
6fc6879b
JM		 3092 return;
3093 }
3094 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3095 sm->pairwise_set = TRUE;
3096
581a8cde
JM		 3097 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
3098 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3099 eloop_register_timeout(sm->wpa_auth->conf.
3100 wpa_ptk_rekey, 0, wpa_rekey_ptk,
3101 sm->wpa_auth, sm);
3102 }
3103
a1ea1b45 3104 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 3105 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 3106 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 3107 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3108 WPA_EAPOL_authorized, 1);
3109 }
3110 }
3111
3112 if (0 /* IBSS == TRUE */) {
3113 sm->keycount++;
3114 if (sm->keycount == 2) {
3115 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3116 WPA_EAPOL_portValid, 1);
3117 }
3118 } else {
3119 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3120 1);
3121 }
3122 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3123 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3124 if (sm->wpa == WPA_VERSION_WPA)
3125 sm->PInitAKeys = TRUE;
3126 else
3127 sm->has_GTK = TRUE;
3128 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3129 "pairwise key handshake completed (%s)",
3130 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3131
4ec1fd8e 3132#ifdef CONFIG_IEEE80211R_AP
6fc6879b 3133 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 3134#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3135}
3136
3137
3138SM_STEP(WPA_PTK)
3139{
3140 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3141
3142 if (sm->Init)
3143 SM_ENTER(WPA_PTK, INITIALIZE);
3144 else if (sm->Disconnect
1aae01fc
BG		 3145 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3146 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3147 "WPA_PTK: sm->Disconnect");
6fc6879b 3148 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 3149 }
6fc6879b
JM		 3150 else if (sm->DeauthenticationRequest)
3151 SM_ENTER(WPA_PTK, DISCONNECTED);
3152 else if (sm->AuthenticationRequest)
3153 SM_ENTER(WPA_PTK, AUTHENTICATION);
3154 else if (sm->ReAuthenticationRequest)
3155 SM_ENTER(WPA_PTK, AUTHENTICATION2);
0adc9b28
JM		 3156 else if (sm->PTKRequest) {
3157 if (wpa_auth_sm_ptk_update(sm) < 0)
3158 SM_ENTER(WPA_PTK, DISCONNECTED);
3159 else
3160 SM_ENTER(WPA_PTK, PTKSTART);
3161 } else switch (sm->wpa_ptk_state) {
6fc6879b
JM		 3162 case WPA_PTK_INITIALIZE:
3163 break;
3164 case WPA_PTK_DISCONNECT:
3165 SM_ENTER(WPA_PTK, DISCONNECTED);
3166 break;
3167 case WPA_PTK_DISCONNECTED:
3168 SM_ENTER(WPA_PTK, INITIALIZE);
3169 break;
3170 case WPA_PTK_AUTHENTICATION:
3171 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3172 break;
3173 case WPA_PTK_AUTHENTICATION2:
56586197 3174 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 3175 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3176 WPA_EAPOL_keyRun) > 0)
3177 SM_ENTER(WPA_PTK, INITPMK);
a1ea1b45
JM		 3178 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3179 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
6fc6879b
JM		 3180 /* FIX: && 802.1X::keyRun */)
3181 SM_ENTER(WPA_PTK, INITPSK);
567da5bb
JM		 3182 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3183 SM_ENTER(WPA_PTK, INITPMK);
6fc6879b
JM		 3184 break;
3185 case WPA_PTK_INITPMK:
3186 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
567da5bb 3187 WPA_EAPOL_keyAvailable) > 0) {
6fc6879b 3188 SM_ENTER(WPA_PTK, PTKSTART);
567da5bb
JM		 3189#ifdef CONFIG_DPP
3190 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3191 SM_ENTER(WPA_PTK, PTKSTART);
3192#endif /* CONFIG_DPP */
3193 } else {
6fc6879b 3194 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 3195 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3196 "INITPMK - keyAvailable = false");
6fc6879b
JM		 3197 SM_ENTER(WPA_PTK, DISCONNECT);
3198 }
3199 break;
3200 case WPA_PTK_INITPSK:
759fd76b 3201 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
7a12edd1 3202 NULL, NULL)) {
6fc6879b 3203 SM_ENTER(WPA_PTK, PTKSTART);
e61fea6b
JM		 3204#ifdef CONFIG_SAE
3205 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3206 SM_ENTER(WPA_PTK, PTKSTART);
3207#endif /* CONFIG_SAE */
3208 } else {
6fc6879b
JM		 3209 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3210 "no PSK configured for the STA");
3211 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3212 SM_ENTER(WPA_PTK, DISCONNECT);
3213 }
3214 break;
3215 case WPA_PTK_PTKSTART:
3216 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3217 sm->EAPOLKeyPairwise)
3218 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3219 else if (sm->TimeoutCtr >
41f140d3 3220 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3221 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3222 wpa_auth_vlogger(
3223 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3224 "PTKSTART: Retry limit %u reached",
3225 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3226 SM_ENTER(WPA_PTK, DISCONNECT);
3227 } else if (sm->TimeoutEvt)
3228 SM_ENTER(WPA_PTK, PTKSTART);
3229 break;
3230 case WPA_PTK_PTKCALCNEGOTIATING:
3231 if (sm->MICVerified)
3232 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3233 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3234 sm->EAPOLKeyPairwise)
3235 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3236 else if (sm->TimeoutEvt)
3237 SM_ENTER(WPA_PTK, PTKSTART);
3238 break;
3239 case WPA_PTK_PTKCALCNEGOTIATING2:
3240 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3241 break;
3242 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3243 if (sm->update_snonce)
3244 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3245 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3246 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3247 SM_ENTER(WPA_PTK, PTKINITDONE);
3248 else if (sm->TimeoutCtr >
6f234c1e
JM		 3249 sm->wpa_auth->conf.wpa_pairwise_update_count ||
3250 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3251 sm->TimeoutCtr > 1)) {
6fc6879b 3252 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3253 wpa_auth_vlogger(
3254 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3255 "PTKINITNEGOTIATING: Retry limit %u reached",
3256 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3257 SM_ENTER(WPA_PTK, DISCONNECT);
3258 } else if (sm->TimeoutEvt)
3259 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3260 break;
3261 case WPA_PTK_PTKINITDONE:
3262 break;
3263 }
3264}
3265
3266
3267SM_STATE(WPA_PTK_GROUP, IDLE)
3268{
3269 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3270 if (sm->Init) {
3271 /* Init flag is not cleared here, so avoid busy
3272 * loop by claiming nothing changed. */
3273 sm->changed = FALSE;
3274 }
3275 sm->GTimeoutCtr = 0;
3276}
3277
3278
3279SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3280{
3281 u8 rsc[WPA_KEY_RSC_LEN];
3282 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3283 const u8 *kde;
3284 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3285 size_t kde_len;
83421850 3286 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3287
3288 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3289
3290 sm->GTimeoutCtr++;
6f234c1e
JM		 3291 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3292 sm->GTimeoutCtr > 1) {
3293 /* Do not allow retransmission of EAPOL-Key group msg 1/2 */
3294 return;
3295 }
41f140d3 3296 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3297 /* No point in sending the EAPOL-Key - we will disconnect
3298 * immediately following this. */
3299 return;
3300 }
3301
6fc6879b
JM		 3302 if (sm->wpa == WPA_VERSION_WPA)
3303 sm->PInitAKeys = FALSE;
3304 sm->TimeoutEvt = FALSE;
3305 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3306 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3307 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3308 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3309 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3310 "sending 1/2 msg of Group Key Handshake");
3311
83421850 3312 gtk = gsm->GTK[gsm->GN - 1];
8d660a4b
JM		 3313 if (sm->wpa_auth->conf.disable_gtk ||
3314 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3315 /*
3316 * Provide unique random GTK to each STA to prevent use
3317 * of GTK in the BSS.
3318 */
3319 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3320 return;
3321 gtk = dummy_gtk;
3322 }
6fc6879b
JM		 3323 if (sm->wpa == WPA_VERSION_WPA2) {
3324 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3325 ieee80211w_kde_len(sm);
e41e4f9e
JM		 3326 kde_buf = os_malloc(kde_len);
3327 if (kde_buf == NULL)
6fc6879b
JM		 3328 return;
3329
e41e4f9e 3330 kde = pos = kde_buf;
6fc6879b
JM		 3331 hdr[0] = gsm->GN & 0x03;
3332 hdr[1] = 0;
3333 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3334 gtk, gsm->GTK_len);
6fc6879b 3335 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 3336 kde_len = pos - kde;
6fc6879b 3337 } else {
83421850 3338 kde = gtk;
e41e4f9e 3339 kde_len = gsm->GTK_len;
6fc6879b
JM		 3340 }
3341
3342 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3343 WPA_KEY_INFO_SECURE |
567da5bb
JM		 3344 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3345 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3346 WPA_KEY_INFO_ACK |
3347 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3348 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3349
3350 os_free(kde_buf);
6fc6879b
JM		 3351}
3352
3353
3354SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3355{
3356 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3357 sm->EAPOLKeyReceived = FALSE;
3358 if (sm->GUpdateStationKeys)
3359 sm->group->GKeyDoneStations--;
3360 sm->GUpdateStationKeys = FALSE;
3361 sm->GTimeoutCtr = 0;
3362 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3363 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3364 "group key handshake completed (%s)",
3365 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3366 sm->has_GTK = TRUE;
3367}
3368
3369
3370SM_STATE(WPA_PTK_GROUP, KEYERROR)
3371{
3372 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3373 if (sm->GUpdateStationKeys)
3374 sm->group->GKeyDoneStations--;
3375 sm->GUpdateStationKeys = FALSE;
3376 sm->Disconnect = TRUE;
4bb9b674
GK		 3377 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3378 "group key handshake failed (%s) after %u tries",
3379 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3380 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3381}
3382
3383
3384SM_STEP(WPA_PTK_GROUP)
3385{
9663596f 3386 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3387 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3388 sm->PtkGroupInit = FALSE;
3389 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3390 case WPA_PTK_GROUP_IDLE:
3391 if (sm->GUpdateStationKeys ||
3392 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3393 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3394 break;
3395 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3396 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3397 !sm->EAPOLKeyPairwise && sm->MICVerified)
3398 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3399 else if (sm->GTimeoutCtr >
6f234c1e
JM		 3400 sm->wpa_auth->conf.wpa_group_update_count ||
3401 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3402 sm->GTimeoutCtr > 1))
6fc6879b
JM		 3403 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3404 else if (sm->TimeoutEvt)
3405 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3406 break;
3407 case WPA_PTK_GROUP_KEYERROR:
3408 SM_ENTER(WPA_PTK_GROUP, IDLE);
3409 break;
3410 case WPA_PTK_GROUP_REKEYESTABLISHED:
3411 SM_ENTER(WPA_PTK_GROUP, IDLE);
3412 break;
3413 }
3414}
3415
3416
3417static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3418 struct wpa_group *group)
3419{
3420 int ret = 0;
3421
6fc6879b
JM		 3422 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3423 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3424 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3425 wpa_auth->addr, group->GNonce,
3426 group->GTK[group->GN - 1], group->GTK_len) < 0)
3427 ret = -1;
5cb9d5c3
JM		 3428 wpa_hexdump_key(MSG_DEBUG, "GTK",
3429 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 3430
3431#ifdef CONFIG_IEEE80211W
70f8cc8e 3432 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3433 size_t len;
3434 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3435 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3436 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3437 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3438 wpa_auth->addr, group->GNonce,
8dd9f9cd 3439 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3440 ret = -1;
6fc6879b 3441 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3442 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 3443 }
3444#endif /* CONFIG_IEEE80211W */
3445
3446 return ret;
3447}
3448
3449
3450static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3451 struct wpa_group *group)
3452{
3453 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3454 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3455 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3456 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3457
3458 /* GTK[0..N] = 0 */
3459 os_memset(group->GTK, 0, sizeof(group->GTK));
3460 group->GN = 1;
3461 group->GM = 2;
3462#ifdef CONFIG_IEEE80211W
3463 group->GN_igtk = 4;
3464 group->GM_igtk = 5;
3465#endif /* CONFIG_IEEE80211W */
3466 /* GTK[GN] = CalcGTK() */
3467 wpa_gtk_update(wpa_auth, group);
3468}
3469
3470
3471static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3472{
473b6f22
MB		 3473 if (ctx != NULL && ctx != sm->group)
3474 return 0;
3475
6fc6879b
JM		 3476 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3477 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3478 "Not in PTKINITDONE; skip Group Key update");
3c183894 3479 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3480 return 0;
3481 }
9663596f
JM		 3482 if (sm->GUpdateStationKeys) {
3483 /*
3c183894
JM		 3484 * This should not really happen, so add a debug log entry.
3485 * Since we clear the GKeyDoneStations before the loop, the
3486 * station needs to be counted here anyway.
9663596f
JM		 3487 */
3488 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3489 "GUpdateStationKeys was already set when "
3490 "marking station for GTK rekeying");
9663596f 3491 }
3c183894 3492
ad3872a3 3493 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3494 if (sm->is_wnmsleep)
3495 return 0;
d32d94db 3496
3c183894
JM		 3497 sm->group->GKeyDoneStations++;
3498 sm->GUpdateStationKeys = TRUE;
3499
6fc6879b
JM		 3500 wpa_sm_step(sm);
3501 return 0;
3502}
3503
3504
b5bf84ba 3505#ifdef CONFIG_WNM_AP
ad3872a3 3506/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3507void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3508{
629edfef 3509 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3510 return;
3511
3512 wpa_group_update_sta(sm, NULL);
3513}
3514
3515
3516void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3517{
629edfef
JM		 3518 if (sm)
3519 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3520}
3521
3522
3523int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3524{
d32d94db 3525 struct wpa_group *gsm = sm->group;
835822d4 3526 u8 *start = pos;
d32d94db
XC		 3527
3528 /*
835822d4 3529 * GTK subelement:
d32d94db 3530 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3531 * Key[5..32]
d32d94db 3532 */
835822d4
JM		 3533 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3534 *pos++ = 11 + gsm->GTK_len;
d32d94db 3535 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3536 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3537 pos += 2;
3538 *pos++ = gsm->GTK_len;
3539 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3540 return 0;
835822d4
JM		 3541 pos += 8;
3542 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3543 pos += gsm->GTK_len;
d32d94db 3544
835822d4
JM		 3545 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3546 gsm->GN);
3547 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3548 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3549
835822d4 3550 return pos - start;
d32d94db
XC		 3551}
3552
3553
3554#ifdef CONFIG_IEEE80211W
3555int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3556{
d32d94db 3557 struct wpa_group *gsm = sm->group;
835822d4 3558 u8 *start = pos;
8dd9f9cd 3559 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3560
835822d4
JM		 3561 /*
3562 * IGTK subelement:
3563 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3564 */
3565 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3566 *pos++ = 2 + 6 + len;
835822d4
JM		 3567 WPA_PUT_LE16(pos, gsm->GN_igtk);
3568 pos += 2;
3569 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3570 return 0;
835822d4 3571 pos += 6;
d32d94db 3572
8dd9f9cd
JM		 3573 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3574 pos += len;
d32d94db 3575
835822d4
JM		 3576 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3577 gsm->GN_igtk);
3578 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3579 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3580
835822d4 3581 return pos - start;
d32d94db
XC		 3582}
3583#endif /* CONFIG_IEEE80211W */
b5bf84ba 3584#endif /* CONFIG_WNM_AP */
d32d94db
XC		 3585
3586
6fc6879b
JM		 3587static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3588 struct wpa_group *group)
3589{
3590 int tmp;
3591
3592 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3593 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3594 group->changed = TRUE;
3595 group->wpa_group_state = WPA_GROUP_SETKEYS;
3596 group->GTKReKey = FALSE;
3597 tmp = group->GM;
3598 group->GM = group->GN;
3599 group->GN = tmp;
3600#ifdef CONFIG_IEEE80211W
3601 tmp = group->GM_igtk;
3602 group->GM_igtk = group->GN_igtk;
3603 group->GN_igtk = tmp;
3604#endif /* CONFIG_IEEE80211W */
3605 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3606 * counting the STAs that are marked with GUpdateStationKeys instead of
3607 * including all STAs that could be in not-yet-completed state. */
3608 wpa_gtk_update(wpa_auth, group);
3609
3c183894
JM		 3610 if (group->GKeyDoneStations) {
3611 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3612 "GKeyDoneStations=%d when starting new GTK rekey",
3613 group->GKeyDoneStations);
3614 group->GKeyDoneStations = 0;
3615 }
473b6f22 3616 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3617 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3618 group->GKeyDoneStations);
3619}
3620
3621
1bdb7ab3
JM		 3622static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3623 struct wpa_group *group)
6fc6879b 3624{
3c7302c2
JM		 3625 int ret = 0;
3626
3c7302c2 3627 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3628 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3629 broadcast_ether_addr, group->GN,
3630 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3631 ret = -1;
6fc6879b
JM		 3632
3633#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3634 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3635 enum wpa_alg alg;
3636 size_t len;
3637
3638 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3639 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3640
3641 if (ret == 0 &&
3642 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3643 broadcast_ether_addr, group->GN_igtk,
3644 group->IGTK[group->GN_igtk - 4], len) < 0)
3645 ret = -1;
3646 }
6fc6879b 3647#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3648
3649 return ret;
6fc6879b
JM		 3650}
3651
3652
7d7f7be2
JM		 3653static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3654{
3655 if (sm->group == ctx) {
3656 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3657 " for discconnection due to fatal failure",
3658 MAC2STR(sm->addr));
3659 sm->Disconnect = TRUE;
3660 }
3661
3662 return 0;
3663}
3664
3665
3666static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3667 struct wpa_group *group)
3668{
3669 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3670 group->changed = TRUE;
3671 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3672 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3673}
3674
3675
1bdb7ab3
JM		 3676static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3677 struct wpa_group *group)
3678{
3679 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3680 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3681 group->changed = TRUE;
3682 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3683
7d7f7be2
JM		 3684 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3685 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3686 return -1;
7d7f7be2 3687 }
1bdb7ab3
JM		 3688
3689 return 0;
3690}
3691
3692
6fc6879b
JM		 3693static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3694 struct wpa_group *group)
3695{
3696 if (group->GInit) {
3697 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3698 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3699 /* Do not allow group operations */
6fc6879b
JM		 3700 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3701 group->GTKAuthenticator) {
3702 wpa_group_setkeysdone(wpa_auth, group);
3703 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3704 group->GTKReKey) {
3705 wpa_group_setkeys(wpa_auth, group);
3706 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3707 if (group->GKeyDoneStations == 0)
3708 wpa_group_setkeysdone(wpa_auth, group);
3709 else if (group->GTKReKey)
3710 wpa_group_setkeys(wpa_auth, group);
3711 }
3712}
3713
3714
e4a6ea1d 3715static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 3716{
3717 if (sm == NULL)
e4a6ea1d 3718 return 0;
6fc6879b
JM		 3719
3720 if (sm->in_step_loop) {
3721 /* This should not happen, but if it does, make sure we do not
3722 * end up freeing the state machine too early by exiting the
3723 * recursive call. */
3724 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 3725 return 0;
6fc6879b
JM		 3726 }
3727
3728 sm->in_step_loop = 1;
3729 do {
3730 if (sm->pending_deinit)
3731 break;
3732
3733 sm->changed = FALSE;
3734 sm->wpa_auth->group->changed = FALSE;
3735
3736 SM_STEP_RUN(WPA_PTK);
3737 if (sm->pending_deinit)
3738 break;
3739 SM_STEP_RUN(WPA_PTK_GROUP);
3740 if (sm->pending_deinit)
3741 break;
3742 wpa_group_sm_step(sm->wpa_auth, sm->group);
3743 } while (sm->changed || sm->wpa_auth->group->changed);
3744 sm->in_step_loop = 0;
3745
3746 if (sm->pending_deinit) {
3747 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3748 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3749 wpa_free_sta_sm(sm);
e4a6ea1d 3750 return 1;
6fc6879b 3751 }
e4a6ea1d 3752 return 0;
6fc6879b
JM		 3753}
3754
3755
3756static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3757{
3758 struct wpa_state_machine *sm = eloop_ctx;
3759 wpa_sm_step(sm);
3760}
3761
3762
3763void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3764{
3765 if (sm == NULL)
3766 return;
3767 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3768}
3769
3770
3771void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3772{
3773 int tmp, i;
3774 struct wpa_group *group;
3775
3776 if (wpa_auth == NULL)
3777 return;
3778
3779 group = wpa_auth->group;
3780
3781 for (i = 0; i < 2; i++) {
3782 tmp = group->GM;
3783 group->GM = group->GN;
3784 group->GN = tmp;
3785#ifdef CONFIG_IEEE80211W
3786 tmp = group->GM_igtk;
3787 group->GM_igtk = group->GN_igtk;
3788 group->GN_igtk = tmp;
3789#endif /* CONFIG_IEEE80211W */
3790 wpa_gtk_update(wpa_auth, group);
9354e594 3791 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 3792 }
3793}
3794
3795
a6da824b 3796static const char * wpa_bool_txt(int val)
6fc6879b 3797{
a6da824b 3798 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 3799}
3800
3801
6fc6879b
JM		 3802#define RSN_SUITE "%02x-%02x-%02x-%d"
3803#define RSN_SUITE_ARG(s) \
3804((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3805
3806int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3807{
3808 int len = 0, ret;
3809 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 3810#ifdef CONFIG_RSN_PREAUTH
3811 const int preauth = 1;
3812#else /* CONFIG_RSN_PREAUTH */
3813 const int preauth = 0;
3814#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 3815
3816 if (wpa_auth == NULL)
3817 return len;
3818
3819 ret = os_snprintf(buf + len, buflen - len,
3820 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 3821 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 3822 "dot11RSNAEnabled=%s\n"
3823 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 3824 wpa_bool_txt(preauth),
6fc6879b
JM		 3825 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3826 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 3827 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3828 return len;
3829 len += ret;
3830
3831 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3832 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3833
3834 ret = os_snprintf(
3835 buf + len, buflen - len,
3836 "dot11RSNAConfigVersion=%u\n"
3837 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3838 /* FIX: dot11RSNAConfigGroupCipher */
3839 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3840 /* FIX: dot11RSNAConfigGroupRekeyTime */
3841 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3842 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3843 "dot11RSNAConfigGroupUpdateCount=%u\n"
3844 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3845 "dot11RSNAConfigGroupCipherSize=%u\n"
3846 "dot11RSNAConfigPMKLifetime=%u\n"
3847 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3848 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3849 "dot11RSNAConfigSATimeout=%u\n"
3850 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3851 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3852 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3853 "dot11RSNAPMKIDUsed=%s\n"
3854 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3855 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3856 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3857 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3858 "dot11RSNA4WayHandshakeFailures=%u\n"
3859 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3860 RSN_VERSION,
3861 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 3862 wpa_auth->conf.wpa_group_update_count,
3863 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 3864 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 3865 dot11RSNAConfigPMKLifetime,
3866 dot11RSNAConfigPMKReauthThreshold,
3867 dot11RSNAConfigSATimeout,
3868 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3869 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3870 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3871 pmkid_txt,
3872 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3873 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3874 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3875 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3876 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 3877 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3878 return len;
3879 len += ret;
3880
3881 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3882 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3883
3884 /* Private MIB */
3885 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3886 wpa_auth->group->wpa_group_state);
d85e1fc8 3887 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3888 return len;
3889 len += ret;
3890
3891 return len;
3892}
3893
3894
3895int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3896{
3897 int len = 0, ret;
3898 u32 pairwise = 0;
3899
3900 if (sm == NULL)
3901 return 0;
3902
3903 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3904
3905 /* dot11RSNAStatsEntry */
3906
c3550295
JM		 3907 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3908 WPA_PROTO_RSN : WPA_PROTO_WPA,
3909 sm->pairwise);
3910 if (pairwise == 0)
6fc6879b
JM		 3911 return 0;
3912
3913 ret = os_snprintf(
3914 buf + len, buflen - len,
3915 /* TODO: dot11RSNAStatsIndex */
3916 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3917 "dot11RSNAStatsVersion=1\n"
3918 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3919 /* TODO: dot11RSNAStatsTKIPICVErrors */
3920 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 3921 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 3922 /* TODO: dot11RSNAStatsCCMPReplays */
3923 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3924 /* TODO: dot11RSNAStatsTKIPReplays */,
3925 MAC2STR(sm->addr),
3926 RSN_SUITE_ARG(pairwise),
3927 sm->dot11RSNAStatsTKIPLocalMICFailures,
3928 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 3929 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3930 return len;
3931 len += ret;
3932
3933 /* Private MIB */
3934 ret = os_snprintf(buf + len, buflen - len,
3935 "hostapdWPAPTKState=%d\n"
3936 "hostapdWPAPTKGroupState=%d\n",
3937 sm->wpa_ptk_state,
3938 sm->wpa_ptk_group_state);
d85e1fc8 3939 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3940 return len;
3941 len += ret;
3942
3943 return len;
3944}
3945
3946
3947void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3948{
3949 if (wpa_auth)
3950 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3951}
3952
3953
3954int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3955{
3956 return sm && sm->pairwise_set;
3957}
3958
3959
ff36ff00
JM		 3960int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3961{
3962 return sm->pairwise;
3963}
3964
3965
6fc6879b
JM		 3966int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3967{
3968 if (sm == NULL)
3969 return -1;
3970 return sm->wpa_key_mgmt;
3971}
3972
3973
3974int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3975{
3976 if (sm == NULL)
3977 return 0;
3978 return sm->wpa;
3979}
3980
3981
0e3bd7ac
MV		 3982int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
3983{
3984 if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
3985 return 0;
3986 return sm->tk_already_set;
3987}
3988
3989
2f1357fb
JM		 3990int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm)
3991{
3992 if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt))
3993 return 0;
3994 return sm->tk_already_set;
3995}
3996
3997
6fc6879b
JM		 3998int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3999 struct rsn_pmksa_cache_entry *entry)
4000{
4001 if (sm == NULL || sm->pmksa != entry)
4002 return -1;
4003 sm->pmksa = NULL;
4004 return 0;
4005}
4006
4007
4008struct rsn_pmksa_cache_entry *
4009wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
4010{
4011 return sm ? sm->pmksa : NULL;
4012}
4013
4014
4015void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
4016{
4017 if (sm)
4018 sm->dot11RSNAStatsTKIPLocalMICFailures++;
4019}
4020
4021
4022const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
4023{
4024 if (wpa_auth == NULL)
4025 return NULL;
4026 *len = wpa_auth->wpa_ie_len;
4027 return wpa_auth->wpa_ie;
4028}
4029
4030
4031int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 4032 unsigned int pmk_len,
6fc6879b
JM		 4033 int session_timeout, struct eapol_state_machine *eapol)
4034{
cb465555
JM		 4035 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
4036 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 4037 return -1;
4038
834c5d68 4039 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
207976f0
JM		 4040 if (pmk_len > PMK_LEN_SUITE_B_192)
4041 pmk_len = PMK_LEN_SUITE_B_192;
4042 } else if (pmk_len > PMK_LEN) {
4043 pmk_len = PMK_LEN;
4044 }
4045
70c93963 4046 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 4047 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 4048 sm->wpa_auth->addr, sm->addr, session_timeout,
4049 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 4050 return 0;
4051
4052 return -1;
4053}
4054
4055
4056int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4057 const u8 *pmk, size_t len, const u8 *sta_addr,
4058 int session_timeout,
4059 struct eapol_state_machine *eapol)
4060{
4061 if (wpa_auth == NULL)
4062 return -1;
4063
70c93963 4064 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 4065 NULL, 0,
4066 wpa_auth->addr,
4bb081f1
JM		 4067 sta_addr, session_timeout, eapol,
4068 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 4069 return 0;
4070
4071 return -1;
4072}
4073
4074
f2991170 4075int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 4076 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 4077{
4078 if (wpa_auth->conf.disable_pmksa_caching)
4079 return -1;
4080
70c93963 4081 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 4082 NULL, 0,
f2991170
JM		 4083 wpa_auth->addr, addr, 0, NULL,
4084 WPA_KEY_MGMT_SAE))
4085 return 0;
4086
4087 return -1;
4088}
4089
4090
9d94e4bb
JM		 4091void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid)
4092{
4093 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4094 sm->pmkid_set = 1;
4095}
4096
4097
0c52953b
JM		 4098int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4099 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4100 int session_timeout, int akmp)
4101{
4102 if (wpa_auth->conf.disable_pmksa_caching)
4103 return -1;
4104
4105 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4106 NULL, 0, wpa_auth->addr, addr, session_timeout,
4107 NULL, akmp))
4108 return 0;
4109
4110 return -1;
4111}
4112
4113
901d1fe1
JM		 4114void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4115 const u8 *sta_addr)
4116{
4117 struct rsn_pmksa_cache_entry *pmksa;
4118
4119 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4120 return;
4121 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4122 if (pmksa) {
4123 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4124 MACSTR " based on request", MAC2STR(sta_addr));
4125 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4126 }
4127}
4128
4129
b8daac18
MH		 4130int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4131 size_t len)
4132{
4133 if (!wpa_auth || !wpa_auth->pmksa)
4134 return 0;
4135 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4136}
4137
4138
4c522c77
MH		 4139void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4140{
4141 if (wpa_auth && wpa_auth->pmksa)
4142 pmksa_cache_auth_flush(wpa_auth->pmksa);
4143}
4144
4145
4d77d80e
MH		 4146#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4147#ifdef CONFIG_MESH
4148
4149int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4150 char *buf, size_t len)
4151{
4152 if (!wpa_auth || !wpa_auth->pmksa)
4153 return 0;
4154
4155 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4156}
4157
4158
4159struct rsn_pmksa_cache_entry *
4160wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4161 const u8 *pmkid, int expiration)
4162{
4163 struct rsn_pmksa_cache_entry *entry;
4164 struct os_reltime now;
4165
4166 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4167 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4168 if (!entry)
4169 return NULL;
4170
4171 os_get_reltime(&now);
4172 entry->expiration = now.sec + expiration;
4173 return entry;
4174}
4175
4176
4177int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4178 struct rsn_pmksa_cache_entry *entry)
4179{
4180 int ret;
4181
4182 if (!wpa_auth || !wpa_auth->pmksa)
4183 return -1;
4184
4185 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4186 if (ret < 0)
4187 wpa_printf(MSG_DEBUG,
4188 "RSN: Failed to store external PMKSA cache for "
4189 MACSTR, MAC2STR(entry->spa));
4190
4191 return ret;
4192}
4193
4194#endif /* CONFIG_MESH */
4195#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4196
4197
9f2cf23e 4198struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 4199wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4200 const u8 *pmkid)
9f2cf23e
MH		 4201{
4202 if (!wpa_auth || !wpa_auth->pmksa)
4203 return NULL;
c1bd4bac 4204 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 4205}
4206
4207
4208void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4209 struct wpa_state_machine *sm,
4210 struct wpa_authenticator *wpa_auth,
4211 u8 *pmkid, u8 *pmk)
4212{
4213 if (!sm)
4214 return;
4215
4216 sm->pmksa = pmksa;
8854f90b
JM		 4217 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4218 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4219 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 4220}
4221
4222
a0ad9e8c
MB		 4223/*
4224 * Remove and free the group from wpa_authenticator. This is triggered by a
4225 * callback to make sure nobody is currently iterating the group list while it
4226 * gets modified.
4227 */
4228static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4229 struct wpa_group *group)
4230{
4231 struct wpa_group *prev = wpa_auth->group;
4232
4233 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4234 group->vlan_id);
4235
4236 while (prev) {
4237 if (prev->next == group) {
4238 /* This never frees the special first group as needed */
4239 prev->next = group->next;
4240 os_free(group);
4241 break;
4242 }
4243 prev = prev->next;
4244 }
4245
4246}
4247
4248
4249/* Increase the reference counter for group */
4250static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4251 struct wpa_group *group)
4252{
4253 /* Skip the special first group */
4254 if (wpa_auth->group == group)
4255 return;
4256
4257 group->references++;
4258}
4259
4260
4261/* Decrease the reference counter and maybe free the group */
4262static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4263 struct wpa_group *group)
4264{
4265 /* Skip the special first group */
4266 if (wpa_auth->group == group)
4267 return;
4268
4269 group->references--;
4270 if (group->references)
4271 return;
4272 wpa_group_free(wpa_auth, group);
4273}
4274
4275
4276/*
4277 * Add a group that has its references counter set to zero. Caller needs to
4278 * call wpa_group_get() on the return value to mark the entry in use.
4279 */
6fc6879b
JM		 4280static struct wpa_group *
4281wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4282{
4283 struct wpa_group *group;
4284
4285 if (wpa_auth == NULL || wpa_auth->group == NULL)
4286 return NULL;
4287
4288 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4289 vlan_id);
bdffdc5d 4290 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4291 if (group == NULL)
4292 return NULL;
4293
4294 group->next = wpa_auth->group->next;
4295 wpa_auth->group->next = group;
4296
4297 return group;
4298}
4299
4300
7cebc8e2
MB		 4301/*
4302 * Enforce that the group state machine for the VLAN is running, increase
4303 * reference counter as interface is up. References might have been increased
4304 * even if a negative value is returned.
4305 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4306 */
4307int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4308{
4309 struct wpa_group *group;
4310
4311 if (wpa_auth == NULL)
4312 return 0;
4313
4314 group = wpa_auth->group;
4315 while (group) {
4316 if (group->vlan_id == vlan_id)
4317 break;
4318 group = group->next;
4319 }
4320
4321 if (group == NULL) {
4322 group = wpa_auth_add_group(wpa_auth, vlan_id);
4323 if (group == NULL)
4324 return -1;
4325 }
4326
4327 wpa_printf(MSG_DEBUG,
4328 "WPA: Ensure group state machine running for VLAN ID %d",
4329 vlan_id);
4330
4331 wpa_group_get(wpa_auth, group);
4332 group->num_setup_iface++;
4333
4334 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4335 return -1;
4336
4337 return 0;
4338}
4339
4340
4341/*
4342 * Decrease reference counter, expected to be zero afterwards.
4343 * returns: -1 on error (group not found, group in fail state)
4344 * -2 if wpa_group is still referenced
4345 * 0 else
4346 */
4347int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4348{
4349 struct wpa_group *group;
4350 int ret = 0;
4351
4352 if (wpa_auth == NULL)
4353 return 0;
4354
4355 group = wpa_auth->group;
4356 while (group) {
4357 if (group->vlan_id == vlan_id)
4358 break;
4359 group = group->next;
4360 }
4361
4362 if (group == NULL)
4363 return -1;
4364
4365 wpa_printf(MSG_DEBUG,
4366 "WPA: Try stopping group state machine for VLAN ID %d",
4367 vlan_id);
4368
4369 if (group->num_setup_iface <= 0) {
4370 wpa_printf(MSG_ERROR,
4371 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4372 vlan_id);
4373 return -1;
4374 }
4375 group->num_setup_iface--;
4376
4377 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4378 ret = -1;
4379
4380 if (group->references > 1) {
4381 wpa_printf(MSG_DEBUG,
4382 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4383 vlan_id);
4384 ret = -2;
4385 }
4386
4387 wpa_group_put(wpa_auth, group);
4388
4389 return ret;
4390}
4391
4392
6fc6879b
JM		 4393int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4394{
4395 struct wpa_group *group;
4396
4397 if (sm == NULL || sm->wpa_auth == NULL)
4398 return 0;
4399
4400 group = sm->wpa_auth->group;
4401 while (group) {
4402 if (group->vlan_id == vlan_id)
4403 break;
4404 group = group->next;
4405 }
4406
4407 if (group == NULL) {
4408 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4409 if (group == NULL)
4410 return -1;
4411 }
4412
4413 if (sm->group == group)
4414 return 0;
4415
7d7f7be2
JM		 4416 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4417 return -1;
4418
6fc6879b
JM		 4419 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4420 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4421
a0ad9e8c
MB		 4422 wpa_group_get(sm->wpa_auth, group);
4423 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4424 sm->group = group;
a0ad9e8c 4425
6fc6879b
JM		 4426 return 0;
4427}
e4bf4db9
JM		 4428
4429
4430void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4431 struct wpa_state_machine *sm, int ack)
4432{
4433 if (wpa_auth == NULL || sm == NULL)
4434 return;
4435 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4436 " ack=%d", MAC2STR(sm->addr), ack);
4437 if (sm->pending_1_of_4_timeout && ack) {
4438 /*
4439 * Some deployed supplicant implementations update their SNonce
4440 * for each EAPOL-Key 2/4 message even within the same 4-way
4441 * handshake and then fail to use the first SNonce when
4442 * deriving the PTK. This results in unsuccessful 4-way
4443 * handshake whenever the relatively short initial timeout is
4444 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4445 * around this by increasing the timeout now that we know that
4446 * the station has received the frame.
4447 */
4448 int timeout_ms = eapol_key_timeout_subseq;
4449 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4450 "timeout by %u ms because of acknowledged frame",
4451 timeout_ms);
4452 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4453 eloop_register_timeout(timeout_ms / 1000,
4454 (timeout_ms % 1000) * 1000,
4455 wpa_send_eapol_timeout, wpa_auth, sm);
4456 }
3d695328
JM		 4457
4458#ifdef CONFIG_TESTING_OPTIONS
4459 if (sm->eapol_status_cb) {
4460 sm->eapol_status_cb(sm->eapol_status_cb_ctx1,
4461 sm->eapol_status_cb_ctx2);
4462 sm->eapol_status_cb = NULL;
4463 }
4464#endif /* CONFIG_TESTING_OPTIONS */
e4bf4db9 4465}
c10347f2
JM		 4466
4467
4468int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4469{
4470 if (sm == NULL)
4471 return 0;
4472 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4473}
aa189ac9
JM		 4474
4475
4476int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4477{
4478 if (sm == NULL)
4479 return 0;
4480 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4481}
25ef8529
JM		 4482
4483
4484#ifdef CONFIG_P2P
4485int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4486{
4487 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4488 return -1;
4489 os_memcpy(addr, sm->ip_addr, 4);
4490 return 0;
4491}
4492#endif /* CONFIG_P2P */
cbc210de
JM		 4493
4494
4495int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4496 struct radius_das_attrs *attr)
4497{
4498 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4499}
34782730
JM		 4500
4501
4502void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4503{
4504 struct wpa_group *group;
4505
4506 if (!wpa_auth)
4507 return;
4508 for (group = wpa_auth->group; group; group = group->next)
4509 wpa_group_config_group_keys(wpa_auth, group);
4510}
7eace378
JM		 4511
4512
4513#ifdef CONFIG_FILS
4514
4515struct wpa_auth_fils_iter_data {
4516 struct wpa_authenticator *auth;
4517 const u8 *cache_id;
4518 struct rsn_pmksa_cache_entry *pmksa;
4519 const u8 *spa;
4520 const u8 *pmkid;
4521};
4522
4523
4524static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4525{
4526 struct wpa_auth_fils_iter_data *data = ctx;
4527
4cc6574d 4528 if (a == data->auth || !a->conf.fils_cache_id_set ||
7eace378
JM		 4529 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4530 FILS_CACHE_ID_LEN) != 0)
4531 return 0;
4532 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4533 return data->pmksa != NULL;
4534}
4535
4536
4537struct rsn_pmksa_cache_entry *
4538wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4539 const u8 *sta_addr, const u8 *pmkid)
4540{
4541 struct wpa_auth_fils_iter_data idata;
4542
4543 if (!wpa_auth->conf.fils_cache_id_set)
4544 return NULL;
4545 idata.auth = wpa_auth;
4546 idata.cache_id = wpa_auth->conf.fils_cache_id;
4547 idata.pmksa = NULL;
4548 idata.spa = sta_addr;
4549 idata.pmkid = pmkid;
4550 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4551 return idata.pmksa;
4552}
4553
5db997e3
JM		 4554
4555#ifdef CONFIG_IEEE80211R_AP
a7968ea5
JM		 4556int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384,
4557 u8 *buf, size_t len)
5db997e3
JM		 4558{
4559 struct wpa_auth_config *conf = &wpa_auth->conf;
4560
a7968ea5 4561 return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder,
5db997e3
JM		 4562 conf->r0_key_holder_len,
4563 NULL, NULL, buf, len, NULL, 0);
4564}
4565#endif /* CONFIG_IEEE80211R_AP */
4566
8acbf85f
JM		 4567
4568void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4569 u8 *fils_anonce, u8 *fils_snonce,
4570 u8 *fils_kek, size_t *fils_kek_len)
4571{
4572 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4573 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4574 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4575 *fils_kek_len = sm->PTK.kek_len;
4576}
4577
7eace378 4578#endif /* CONFIG_FILS */
6bc2f00f
JM		 4579
4580
82424732 4581#ifdef CONFIG_TESTING_OPTIONS
d8afdb21 4582
3d695328
JM		 4583int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce,
4584 void (*cb)(void *ctx1, void *ctx2),
4585 void *ctx1, void *ctx2)
d8afdb21
JM		 4586{
4587 const u8 *anonce = sm->ANonce;
4588 u8 anonce_buf[WPA_NONCE_LEN];
4589
4590 if (change_anonce) {
4591 if (random_get_bytes(anonce_buf, WPA_NONCE_LEN))
4592 return -1;
4593 anonce = anonce_buf;
4594 }
4595
4596 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4597 "sending 1/4 msg of 4-Way Handshake (TESTING)");
4598 wpa_send_eapol(sm->wpa_auth, sm,
4599 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
4600 anonce, NULL, 0, 0, 0);
4601 return 0;
4602}
4603
4604
3d695328
JM		 4605int wpa_auth_resend_m3(struct wpa_state_machine *sm,
4606 void (*cb)(void *ctx1, void *ctx2),
4607 void *ctx1, void *ctx2)
d8afdb21 4608{
0c3bc1be
LD		 4609 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
4610#ifdef CONFIG_IEEE80211W
4611 u8 *opos;
4612#endif /* CONFIG_IEEE80211W */
d8afdb21
JM		 4613 size_t gtk_len, kde_len;
4614 struct wpa_group *gsm = sm->group;
4615 u8 *wpa_ie;
4616 int wpa_ie_len, secure, keyidx, encr = 0;
4617
4618 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
4619 GTK[GN], IGTK, [FTIE], [TIE * 2])
4620 */
4621
4622 /* Use 0 RSC */
4623 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4624 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
4625 wpa_ie = sm->wpa_auth->wpa_ie;
4626 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
4627 if (sm->wpa == WPA_VERSION_WPA &&
4628 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
4629 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
4630 /* WPA-only STA, remove RSN IE and possible MDIE */
4631 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4632 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
4633 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4634 wpa_ie_len = wpa_ie[1] + 2;
4635 }
4636 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4637 "sending 3/4 msg of 4-Way Handshake (TESTING)");
4638 if (sm->wpa == WPA_VERSION_WPA2) {
4639 /* WPA2 send GTK in the 4-way handshake */
4640 secure = 1;
4641 gtk = gsm->GTK[gsm->GN - 1];
4642 gtk_len = gsm->GTK_len;
4643 keyidx = gsm->GN;
4644 _rsc = rsc;
4645 encr = 1;
4646 } else {
4647 /* WPA does not include GTK in msg 3/4 */
4648 secure = 0;
4649 gtk = NULL;
4650 gtk_len = 0;
4651 keyidx = 0;
4652 _rsc = NULL;
4653 if (sm->rx_eapol_key_secure) {
4654 /*
4655 * It looks like Windows 7 supplicant tries to use
4656 * Secure bit in msg 2/4 after having reported Michael
4657 * MIC failure and it then rejects the 4-way handshake
4658 * if msg 3/4 does not set Secure bit. Work around this
4659 * by setting the Secure bit here even in the case of
4660 * WPA if the supplicant used it first.
4661 */
4662 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4663 "STA used Secure bit in WPA msg 2/4 - "
4664 "set Secure for 3/4 as workaround");
4665 secure = 1;
4666 }
4667 }
4668
4669 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
4670 if (gtk)
4671 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4672#ifdef CONFIG_IEEE80211R_AP
4673 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4674 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
4675 kde_len += 300; /* FTIE + 2 * TIE */
4676 }
4677#endif /* CONFIG_IEEE80211R_AP */
4678 kde = os_malloc(kde_len);
4679 if (kde == NULL)
4680 return -1;
4681
4682 pos = kde;
4683 os_memcpy(pos, wpa_ie, wpa_ie_len);
4684 pos += wpa_ie_len;
4685#ifdef CONFIG_IEEE80211R_AP
4686 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4687 int res;
4688 size_t elen;
4689
4690 elen = pos - kde;
4691 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
4692 if (res < 0) {
4693 wpa_printf(MSG_ERROR, "FT: Failed to insert "
4694 "PMKR1Name into RSN IE in EAPOL-Key data");
4695 os_free(kde);
4696 return -1;
4697 }
4698 pos -= wpa_ie_len;
4699 pos += elen;
4700 }
4701#endif /* CONFIG_IEEE80211R_AP */
4702 if (gtk) {
4703 u8 hdr[2];
4704 hdr[0] = keyidx & 0x03;
4705 hdr[1] = 0;
4706 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
4707 gtk, gtk_len);
4708 }
0c3bc1be 4709#ifdef CONFIG_IEEE80211W
d8afdb21
JM		 4710 opos = pos;
4711 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 4712 if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
4713 /* skip KDE header and keyid */
4714 opos += 2 + RSN_SELECTOR_LEN + 2;
d8afdb21
JM		 4715 os_memset(opos, 0, 6); /* clear PN */
4716 }
0c3bc1be 4717#endif /* CONFIG_IEEE80211W */
d8afdb21
JM		 4718
4719#ifdef CONFIG_IEEE80211R_AP
4720 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4721 int res;
4722 struct wpa_auth_config *conf;
4723
4724 conf = &sm->wpa_auth->conf;
4725 if (sm->assoc_resp_ftie &&
4726 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
4727 os_memcpy(pos, sm->assoc_resp_ftie,
4728 2 + sm->assoc_resp_ftie[1]);
4729 res = 2 + sm->assoc_resp_ftie[1];
4730 } else {
a7968ea5
JM		 4731 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
4732
4733 res = wpa_write_ftie(conf, use_sha384,
4734 conf->r0_key_holder,
d8afdb21
JM		 4735 conf->r0_key_holder_len,
4736 NULL, NULL, pos,
4737 kde + kde_len - pos,
4738 NULL, 0);
4739 }
4740 if (res < 0) {
4741 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
4742 "into EAPOL-Key Key Data");
4743 os_free(kde);
4744 return -1;
4745 }
4746 pos += res;
4747
4748 /* TIE[ReassociationDeadline] (TU) */
4749 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
4750 *pos++ = 5;
4751 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
4752 WPA_PUT_LE32(pos, conf->reassociation_deadline);
4753 pos += 4;
4754
4755 /* TIE[KeyLifetime] (seconds) */
4756 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
4757 *pos++ = 5;
4758 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 4759 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
d8afdb21
JM		 4760 pos += 4;
4761 }
4762#endif /* CONFIG_IEEE80211R_AP */
4763
4764 wpa_send_eapol(sm->wpa_auth, sm,
4765 (secure ? WPA_KEY_INFO_SECURE : 0) |
4766 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
4767 WPA_KEY_INFO_MIC : 0) |
4768 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
4769 WPA_KEY_INFO_KEY_TYPE,
4770 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
4771 os_free(kde);
4772 return 0;
4773}
4774
4775
3d695328
JM		 4776int wpa_auth_resend_group_m1(struct wpa_state_machine *sm,
4777 void (*cb)(void *ctx1, void *ctx2),
4778 void *ctx1, void *ctx2)
6bc2f00f
JM		 4779{
4780 u8 rsc[WPA_KEY_RSC_LEN];
4781 struct wpa_group *gsm = sm->group;
4782 const u8 *kde;
0c3bc1be
LD		 4783 u8 *kde_buf = NULL, *pos, hdr[2];
4784#ifdef CONFIG_IEEE80211W
4785 u8 *opos;
4786#endif /* CONFIG_IEEE80211W */
6bc2f00f
JM		 4787 size_t kde_len;
4788 u8 *gtk;
4789
4790 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
4791 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4792 /* Use 0 RSC */
4793 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4794 "sending 1/2 msg of Group Key Handshake (TESTING)");
4795
4796 gtk = gsm->GTK[gsm->GN - 1];
4797 if (sm->wpa == WPA_VERSION_WPA2) {
4798 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
4799 ieee80211w_kde_len(sm);
4800 kde_buf = os_malloc(kde_len);
4801 if (kde_buf == NULL)
4802 return -1;
4803
4804 kde = pos = kde_buf;
4805 hdr[0] = gsm->GN & 0x03;
4806 hdr[1] = 0;
4807 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
4808 gtk, gsm->GTK_len);
0c3bc1be 4809#ifdef CONFIG_IEEE80211W
6bc2f00f
JM		 4810 opos = pos;
4811 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 4812 if (pos - opos >=
4813 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
4814 /* skip KDE header and keyid */
4815 opos += 2 + RSN_SELECTOR_LEN + 2;
6bc2f00f
JM		 4816 os_memset(opos, 0, 6); /* clear PN */
4817 }
0c3bc1be 4818#endif /* CONFIG_IEEE80211W */
6bc2f00f
JM		 4819 kde_len = pos - kde;
4820 } else {
4821 kde = gtk;
4822 kde_len = gsm->GTK_len;
4823 }
4824
3d695328
JM		 4825 sm->eapol_status_cb = cb;
4826 sm->eapol_status_cb_ctx1 = ctx1;
4827 sm->eapol_status_cb_ctx2 = ctx2;
4828
6bc2f00f
JM		 4829 wpa_send_eapol(sm->wpa_auth, sm,
4830 WPA_KEY_INFO_SECURE |
4831 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
4832 WPA_KEY_INFO_MIC : 0) |
4833 WPA_KEY_INFO_ACK |
4834 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
4835 rsc, NULL, kde, kde_len, gsm->GN, 1);
4836
4837 os_free(kde_buf);
4838 return 0;
4839}
d8afdb21 4840
92662fb2
JB		 4841
4842int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth)
4843{
4844 if (!wpa_auth)
4845 return -1;
4846 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
4847 return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL);
4848}
4849
6bc2f00f 4850#endif /* CONFIG_TESTING_OPTIONS */
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