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nl80211: Check nla_put_flag() failure for ext auth
[thirdparty/hostap.git] / src / ap / wpa_auth.c
CommitLineData
6fc6879b 1/*
00338a4f 2 * IEEE 802.11 RSN / WPA Authenticator
bb05d036 3 * Copyright (c) 2004-2019, 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"
17c2559c 16#include "common/ocv.h"
3b5b7aa8 17#include "crypto/aes.h"
03da66bd 18#include "crypto/aes_wrap.h"
3b5b7aa8 19#include "crypto/aes_siv.h"
03da66bd
JM		 20#include "crypto/crypto.h"
21#include "crypto/sha1.h"
22#include "crypto/sha256.h"
c6eb3e34 23#include "crypto/sha384.h"
3642c431 24#include "crypto/random.h"
281c950b 25#include "eapol_auth/eapol_auth_sm.h"
17c2559c 26#include "drivers/driver.h"
6226e38d 27#include "ap_config.h"
6fc6879b 28#include "ieee802_11.h"
6226e38d
JM		 29#include "wpa_auth.h"
30#include "pmksa_cache_auth.h"
6fc6879b
JM		 31#include "wpa_auth_i.h"
32#include "wpa_auth_ie.h"
33
34#define STATE_MACHINE_DATA struct wpa_state_machine
35#define STATE_MACHINE_DEBUG_PREFIX "WPA"
36#define STATE_MACHINE_ADDR sm->addr
37
38
39static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 40static int wpa_sm_step(struct wpa_state_machine *sm);
567da5bb
JM		 41static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
42 u8 *data, size_t data_len);
75c8563e
JM		 43#ifdef CONFIG_FILS
44static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
45 u8 *buf, size_t buf_len, u16 *_key_data_len);
9392859d
JM		 46static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
47 const struct wpabuf *hlp);
75c8563e 48#endif /* CONFIG_FILS */
6fc6879b
JM		 49static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
50static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
51 struct wpa_group *group);
581a8cde 52static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 53static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
54 struct wpa_group *group);
1bdb7ab3
JM		 55static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
56 struct wpa_group *group);
f23c5b17 57static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 58 const u8 *pmk, unsigned int pmk_len,
59 struct wpa_ptk *ptk);
a0ad9e8c
MB		 60static void wpa_group_free(struct wpa_authenticator *wpa_auth,
61 struct wpa_group *group);
62static void wpa_group_get(struct wpa_authenticator *wpa_auth,
63 struct wpa_group *group);
64static void wpa_group_put(struct wpa_authenticator *wpa_auth,
65 struct wpa_group *group);
e73ffa09 66static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
6fc6879b 67
bae61562
JM		 68static const u32 eapol_key_timeout_first = 100; /* ms */
69static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 70static const u32 eapol_key_timeout_first_group = 500; /* ms */
6f234c1e 71static const u32 eapol_key_timeout_no_retrans = 4000; /* ms */
6fc6879b
JM		 72
73/* TODO: make these configurable */
74static const int dot11RSNAConfigPMKLifetime = 43200;
75static const int dot11RSNAConfigPMKReauthThreshold = 70;
76static const int dot11RSNAConfigSATimeout = 60;
77
78
c772d054 79static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 80 struct wpa_authenticator *wpa_auth, const u8 *addr)
81{
cef8fac0
JB		 82 if (wpa_auth->cb->mic_failure_report)
83 return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
c772d054 84 return 0;
6fc6879b
JM		 85}
86
87
2c502460
JM		 88static inline void wpa_auth_psk_failure_report(
89 struct wpa_authenticator *wpa_auth, const u8 *addr)
90{
cef8fac0
JB		 91 if (wpa_auth->cb->psk_failure_report)
92 wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
2c502460
JM		 93}
94
95
6fc6879b
JM		 96static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
97 const u8 *addr, wpa_eapol_variable var,
98 int value)
99{
cef8fac0
JB		 100 if (wpa_auth->cb->set_eapol)
101 wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
6fc6879b
JM		 102}
103
104
105static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
106 const u8 *addr, wpa_eapol_variable var)
107{
cef8fac0 108 if (wpa_auth->cb->get_eapol == NULL)
6fc6879b 109 return -1;
cef8fac0 110 return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
6fc6879b
JM		 111}
112
113
114static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 115 const u8 *addr,
116 const u8 *p2p_dev_addr,
dbfa691d
JM		 117 const u8 *prev_psk, size_t *psk_len,
118 int *vlan_id)
6fc6879b 119{
cef8fac0 120 if (wpa_auth->cb->get_psk == NULL)
6fc6879b 121 return NULL;
cef8fac0 122 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
dbfa691d 123 prev_psk, psk_len, vlan_id);
6fc6879b
JM		 124}
125
126
127static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
128 const u8 *addr, u8 *msk, size_t *len)
129{
cef8fac0 130 if (wpa_auth->cb->get_msk == NULL)
6fc6879b 131 return -1;
cef8fac0 132 return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
6fc6879b
JM		 133}
134
135
136static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
137 int vlan_id,
71934751 138 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 139 u8 *key, size_t key_len)
140{
cef8fac0 141 if (wpa_auth->cb->set_key == NULL)
6fc6879b 142 return -1;
cef8fac0
JB		 143 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
144 key, key_len);
6fc6879b
JM		 145}
146
147
148static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
149 const u8 *addr, int idx, u8 *seq)
150{
cef8fac0 151 if (wpa_auth->cb->get_seqnum == NULL)
6fc6879b 152 return -1;
cef8fac0 153 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
6fc6879b
JM		 154}
155
156
6fc6879b
JM		 157static inline int
158wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
159 const u8 *data, size_t data_len, int encrypt)
160{
cef8fac0 161 if (wpa_auth->cb->send_eapol == NULL)
6fc6879b 162 return -1;
cef8fac0
JB		 163 return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
164 encrypt);
6fc6879b
JM		 165}
166
167
c50d94f1
BC		 168#ifdef CONFIG_MESH
169static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
170 const u8 *addr)
171{
cef8fac0 172 if (wpa_auth->cb->start_ampe == NULL)
c50d94f1 173 return -1;
cef8fac0 174 return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
c50d94f1
BC		 175}
176#endif /* CONFIG_MESH */
177
178
6fc6879b
JM		 179int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
180 int (*cb)(struct wpa_state_machine *sm, void *ctx),
181 void *cb_ctx)
182{
cef8fac0 183 if (wpa_auth->cb->for_each_sta == NULL)
6fc6879b 184 return 0;
cef8fac0 185 return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
6fc6879b
JM		 186}
187
188
bf98f7f3
JM		 189int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
190 int (*cb)(struct wpa_authenticator *a, void *ctx),
191 void *cb_ctx)
192{
cef8fac0 193 if (wpa_auth->cb->for_each_auth == NULL)
bf98f7f3 194 return 0;
cef8fac0 195 return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
bf98f7f3
JM		 196}
197
198
6fc6879b
JM		 199void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
200 logger_level level, const char *txt)
201{
cef8fac0 202 if (wpa_auth->cb->logger == NULL)
6fc6879b 203 return;
cef8fac0 204 wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
6fc6879b
JM		 205}
206
207
208void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
209 logger_level level, const char *fmt, ...)
210{
211 char *format;
212 int maxlen;
213 va_list ap;
214
cef8fac0 215 if (wpa_auth->cb->logger == NULL)
6fc6879b
JM		 216 return;
217
218 maxlen = os_strlen(fmt) + 100;
219 format = os_malloc(maxlen);
220 if (!format)
221 return;
222
223 va_start(ap, fmt);
224 vsnprintf(format, maxlen, fmt, ap);
225 va_end(ap);
226
227 wpa_auth_logger(wpa_auth, addr, level, format);
228
229 os_free(format);
230}
231
232
233static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
567da5bb 234 const u8 *addr, u16 reason)
6fc6879b 235{
cef8fac0 236 if (wpa_auth->cb->disconnect == NULL)
6fc6879b 237 return;
567da5bb
JM		 238 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)",
239 MAC2STR(addr), reason);
240 wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason);
6fc6879b
JM		 241}
242
243
17c2559c
MV		 244#ifdef CONFIG_OCV
245static int wpa_channel_info(struct wpa_authenticator *wpa_auth,
246 struct wpa_channel_info *ci)
247{
248 if (!wpa_auth->cb->channel_info)
249 return -1;
250 return wpa_auth->cb->channel_info(wpa_auth->cb_ctx, ci);
251}
252#endif /* CONFIG_OCV */
253
254
dbfa691d
JM		 255static int wpa_auth_update_vlan(struct wpa_authenticator *wpa_auth,
256 const u8 *addr, int vlan_id)
257{
258 if (!wpa_auth->cb->update_vlan)
259 return -1;
260 return wpa_auth->cb->update_vlan(wpa_auth->cb_ctx, addr, vlan_id);
261}
262
263
6fc6879b
JM		 264static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
265{
266 struct wpa_authenticator *wpa_auth = eloop_ctx;
267
3642c431 268 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 269 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
270 "initialization.");
271 } else {
272 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 273 wpa_hexdump_key(MSG_DEBUG, "GMK",
274 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 275 }
276
277 if (wpa_auth->conf.wpa_gmk_rekey) {
278 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
279 wpa_rekey_gmk, wpa_auth, NULL);
280 }
281}
282
283
284static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
285{
286 struct wpa_authenticator *wpa_auth = eloop_ctx;
a0ad9e8c 287 struct wpa_group *group, *next;
6fc6879b
JM		 288
289 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
a0ad9e8c
MB		 290 group = wpa_auth->group;
291 while (group) {
292 wpa_group_get(wpa_auth, group);
293
6fc6879b
JM		 294 group->GTKReKey = TRUE;
295 do {
296 group->changed = FALSE;
297 wpa_group_sm_step(wpa_auth, group);
298 } while (group->changed);
a0ad9e8c
MB		 299
300 next = group->next;
301 wpa_group_put(wpa_auth, group);
302 group = next;
6fc6879b
JM		 303 }
304
305 if (wpa_auth->conf.wpa_group_rekey) {
306 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
307 0, wpa_rekey_gtk, wpa_auth, NULL);
308 }
309}
310
311
581a8cde
JM		 312static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
313{
314 struct wpa_authenticator *wpa_auth = eloop_ctx;
315 struct wpa_state_machine *sm = timeout_ctx;
316
317 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
318 wpa_request_new_ptk(sm);
319 wpa_sm_step(sm);
320}
321
322
6fc6879b
JM		 323static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
324{
325 if (sm->pmksa == ctx)
326 sm->pmksa = NULL;
327 return 0;
328}
329
330
331static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
332 void *ctx)
333{
334 struct wpa_authenticator *wpa_auth = ctx;
335 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
336}
337
338
1bdb7ab3
JM		 339static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
340 struct wpa_group *group)
341{
559cdabb 342 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 343 u8 rkey[32];
559cdabb 344 unsigned long ptr;
1bdb7ab3 345
3642c431 346 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 347 return -1;
348 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
349
350 /*
351 * Counter = PRF-256(Random number, "Init Counter",
352 * Local MAC Address || Time)
353 */
354 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
355 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 356 ptr = (unsigned long) group;
357 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
525923b1
JM		 358#ifdef TEST_FUZZ
359 os_memset(buf + ETH_ALEN, 0xab, 8);
360 os_memset(buf + ETH_ALEN + 8, 0xcd, sizeof(ptr));
361#endif /* TEST_FUZZ */
3642c431 362 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 363 return -1;
364
365 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
366 group->Counter, WPA_NONCE_LEN) < 0)
367 return -1;
368 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
369 group->Counter, WPA_NONCE_LEN);
370
371 return 0;
372}
373
374
e6965d4e 375static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 376 int vlan_id, int delay_init)
e6965d4e
JM		 377{
378 struct wpa_group *group;
e6965d4e
JM		 379
380 group = os_zalloc(sizeof(struct wpa_group));
381 if (group == NULL)
382 return NULL;
383
384 group->GTKAuthenticator = TRUE;
385 group->vlan_id = vlan_id;
c3550295 386 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 387
08704cd8
JM		 388 if (random_pool_ready() != 1) {
389 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
390 "for secure operations - update keys later when "
391 "the first station connects");
392 }
393
1bdb7ab3
JM		 394 /*
395 * Set initial GMK/Counter value here. The actual values that will be
396 * used in negotiations will be set once the first station tries to
397 * connect. This allows more time for collecting additional randomness
398 * on embedded devices.
6fc6879b 399 */
1bdb7ab3 400 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 401 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
402 "initialization.");
403 os_free(group);
404 return NULL;
405 }
6fc6879b
JM		 406
407 group->GInit = TRUE;
bdffdc5d
JM		 408 if (delay_init) {
409 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
410 "until Beacon frames have been configured");
411 /* Initialization is completed in wpa_init_keys(). */
412 } else {
413 wpa_group_sm_step(wpa_auth, group);
414 group->GInit = FALSE;
415 wpa_group_sm_step(wpa_auth, group);
416 }
6fc6879b
JM		 417
418 return group;
419}
420
421
422/**
423 * wpa_init - Initialize WPA authenticator
424 * @addr: Authenticator address
425 * @conf: Configuration for WPA authenticator
a17df5fb 426 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 427 * Returns: Pointer to WPA authenticator data or %NULL on failure
428 */
429struct wpa_authenticator * wpa_init(const u8 *addr,
430 struct wpa_auth_config *conf,
cef8fac0
JB		 431 const struct wpa_auth_callbacks *cb,
432 void *cb_ctx)
6fc6879b
JM		 433{
434 struct wpa_authenticator *wpa_auth;
435
436 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
437 if (wpa_auth == NULL)
438 return NULL;
439 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
440 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
cef8fac0
JB		 441 wpa_auth->cb = cb;
442 wpa_auth->cb_ctx = cb_ctx;
6fc6879b
JM		 443
444 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
445 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
446 os_free(wpa_auth);
447 return NULL;
448 }
449
bdffdc5d 450 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 451 if (wpa_auth->group == NULL) {
452 os_free(wpa_auth->wpa_ie);
453 os_free(wpa_auth);
454 return NULL;
455 }
456
4bb081f1
JM		 457 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
458 wpa_auth);
6fc6879b
JM		 459 if (wpa_auth->pmksa == NULL) {
460 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 461 os_free(wpa_auth->group);
6fc6879b
JM		 462 os_free(wpa_auth->wpa_ie);
463 os_free(wpa_auth);
464 return NULL;
465 }
466
4ec1fd8e 467#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 468 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
469 if (wpa_auth->ft_pmk_cache == NULL) {
470 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 471 os_free(wpa_auth->group);
6fc6879b 472 os_free(wpa_auth->wpa_ie);
4bb081f1 473 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 474 os_free(wpa_auth);
475 return NULL;
476 }
4ec1fd8e 477#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 478
479 if (wpa_auth->conf.wpa_gmk_rekey) {
480 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
481 wpa_rekey_gmk, wpa_auth, NULL);
482 }
483
484 if (wpa_auth->conf.wpa_group_rekey) {
485 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
486 wpa_rekey_gtk, wpa_auth, NULL);
487 }
488
25ef8529
JM		 489#ifdef CONFIG_P2P
490 if (WPA_GET_BE32(conf->ip_addr_start)) {
491 int count = WPA_GET_BE32(conf->ip_addr_end) -
492 WPA_GET_BE32(conf->ip_addr_start) + 1;
493 if (count > 1000)
494 count = 1000;
495 if (count > 0)
496 wpa_auth->ip_pool = bitfield_alloc(count);
497 }
498#endif /* CONFIG_P2P */
499
6fc6879b
JM		 500 return wpa_auth;
501}
502
503
bdffdc5d
JM		 504int wpa_init_keys(struct wpa_authenticator *wpa_auth)
505{
506 struct wpa_group *group = wpa_auth->group;
507
508 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
509 "keys");
510 wpa_group_sm_step(wpa_auth, group);
511 group->GInit = FALSE;
512 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 513 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
514 return -1;
bdffdc5d
JM		 515 return 0;
516}
517
518
6fc6879b
JM		 519/**
520 * wpa_deinit - Deinitialize WPA authenticator
521 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
522 */
523void wpa_deinit(struct wpa_authenticator *wpa_auth)
524{
525 struct wpa_group *group, *prev;
526
527 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
528 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
529
4bb081f1 530 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b 531
4ec1fd8e 532#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 533 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
534 wpa_auth->ft_pmk_cache = NULL;
eefe8630 535 wpa_ft_deinit(wpa_auth);
4ec1fd8e 536#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 537
25ef8529
JM		 538#ifdef CONFIG_P2P
539 bitfield_free(wpa_auth->ip_pool);
540#endif /* CONFIG_P2P */
541
542
6fc6879b
JM		 543 os_free(wpa_auth->wpa_ie);
544
545 group = wpa_auth->group;
546 while (group) {
547 prev = group;
548 group = group->next;
549 os_free(prev);
550 }
551
552 os_free(wpa_auth);
553}
554
555
556/**
557 * wpa_reconfig - Update WPA authenticator configuration
558 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
559 * @conf: Configuration for WPA authenticator
560 */
561int wpa_reconfig(struct wpa_authenticator *wpa_auth,
562 struct wpa_auth_config *conf)
563{
e6965d4e 564 struct wpa_group *group;
6fc6879b
JM		 565 if (wpa_auth == NULL)
566 return 0;
567
568 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 569 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
570 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
571 return -1;
572 }
573
e6965d4e
JM		 574 /*
575 * Reinitialize GTK to make sure it is suitable for the new
576 * configuration.
577 */
578 group = wpa_auth->group;
c3550295 579 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 580 group->GInit = TRUE;
581 wpa_group_sm_step(wpa_auth, group);
582 group->GInit = FALSE;
583 wpa_group_sm_step(wpa_auth, group);
584
6fc6879b
JM		 585 return 0;
586}
587
588
589struct wpa_state_machine *
94ddef3e
JM		 590wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
591 const u8 *p2p_dev_addr)
6fc6879b
JM		 592{
593 struct wpa_state_machine *sm;
594
7d7f7be2
JM		 595 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
596 return NULL;
597
6fc6879b
JM		 598 sm = os_zalloc(sizeof(struct wpa_state_machine));
599 if (sm == NULL)
600 return NULL;
601 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 602 if (p2p_dev_addr)
603 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 604
605 sm->wpa_auth = wpa_auth;
606 sm->group = wpa_auth->group;
a0ad9e8c 607 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 608
609 return sm;
610}
611
612
6f9b5d16
JM		 613int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
614 struct wpa_state_machine *sm)
6fc6879b
JM		 615{
616 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 617 return -1;
6fc6879b 618
4ec1fd8e 619#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 620 if (sm->ft_completed) {
621 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
622 "FT authentication already completed - do not "
623 "start 4-way handshake");
3d4d2348
JM		 624 /* Go to PTKINITDONE state to allow GTK rekeying */
625 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 626 sm->Pair = TRUE;
6f9b5d16 627 return 0;
6fc6879b 628 }
4ec1fd8e 629#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 630
07e0117d
JM		 631#ifdef CONFIG_FILS
632 if (sm->fils_completed) {
633 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
634 "FILS authentication already completed - do not start 4-way handshake");
635 /* Go to PTKINITDONE state to allow GTK rekeying */
636 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 637 sm->Pair = TRUE;
07e0117d
JM		 638 return 0;
639 }
640#endif /* CONFIG_FILS */
641
6fc6879b 642 if (sm->started) {
22a299ee 643 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 644 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 645 return wpa_sm_step(sm);
6fc6879b
JM		 646 }
647
648 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
649 "start authentication");
650 sm->started = 1;
651
652 sm->Init = TRUE;
e4a6ea1d 653 if (wpa_sm_step(sm) == 1)
6f9b5d16 654 return 1; /* should not really happen */
6fc6879b
JM		 655 sm->Init = FALSE;
656 sm->AuthenticationRequest = TRUE;
6f9b5d16 657 return wpa_sm_step(sm);
6fc6879b
JM		 658}
659
660
a8d05fca
JM		 661void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
662{
663 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
664 * reassociates back to the same AP while the previous entry for the
665 * STA has not yet been removed. */
666 if (sm == NULL)
667 return;
668
669 sm->wpa_key_mgmt = 0;
670}
671
672
6fc6879b
JM		 673static void wpa_free_sta_sm(struct wpa_state_machine *sm)
674{
25ef8529
JM		 675#ifdef CONFIG_P2P
676 if (WPA_GET_BE32(sm->ip_addr)) {
677 u32 start;
678 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
679 "address %u.%u.%u.%u from " MACSTR,
680 sm->ip_addr[0], sm->ip_addr[1],
681 sm->ip_addr[2], sm->ip_addr[3],
682 MAC2STR(sm->addr));
683 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
684 bitfield_clear(sm->wpa_auth->ip_pool,
685 WPA_GET_BE32(sm->ip_addr) - start);
686 }
687#endif /* CONFIG_P2P */
2ade8ef2
JM		 688 if (sm->GUpdateStationKeys) {
689 sm->group->GKeyDoneStations--;
690 sm->GUpdateStationKeys = FALSE;
691 }
4ec1fd8e 692#ifdef CONFIG_IEEE80211R_AP
0f857f43 693 os_free(sm->assoc_resp_ftie);
692ec305 694 wpabuf_free(sm->ft_pending_req_ies);
4ec1fd8e 695#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 696 os_free(sm->last_rx_eapol_key);
697 os_free(sm->wpa_ie);
a0ad9e8c 698 wpa_group_put(sm->wpa_auth, sm->group);
10ec6a5f
JM		 699#ifdef CONFIG_DPP2
700 wpabuf_clear_free(sm->dpp_z);
701#endif /* CONFIG_DPP2 */
6fc6879b
JM		 702 os_free(sm);
703}
704
705
706void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
707{
708 if (sm == NULL)
709 return;
710
711 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
712 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
713 "strict rekeying - force GTK rekey since STA "
714 "is leaving");
3f5a1860
JB		 715 if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk,
716 sm->wpa_auth, NULL) == -1)
717 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
718 NULL);
6fc6879b
JM		 719 }
720
721 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 722 sm->pending_1_of_4_timeout = 0;
6fc6879b 723 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 724 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3a46cf93
MB		 725#ifdef CONFIG_IEEE80211R_AP
726 wpa_ft_sta_deinit(sm);
727#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 728 if (sm->in_step_loop) {
729 /* Must not free state machine while wpa_sm_step() is running.
730 * Freeing will be completed in the end of wpa_sm_step(). */
731 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
732 "machine deinit for " MACSTR, MAC2STR(sm->addr));
733 sm->pending_deinit = 1;
734 } else
735 wpa_free_sta_sm(sm);
736}
737
738
739static void wpa_request_new_ptk(struct wpa_state_machine *sm)
740{
741 if (sm == NULL)
742 return;
743
744 sm->PTKRequest = TRUE;
745 sm->PTK_valid = 0;
746}
747
748
68921e24 749static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 750 const u8 *replay_counter)
751{
752 int i;
753 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 754 if (!ctr[i].valid)
22a299ee 755 break;
68921e24 756 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 757 WPA_REPLAY_COUNTER_LEN) == 0)
758 return 1;
759 }
760 return 0;
761}
762
763
68921e24
JM		 764static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
765 const u8 *replay_counter)
766{
767 int i;
768 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
769 if (ctr[i].valid &&
770 (replay_counter == NULL ||
771 os_memcmp(replay_counter, ctr[i].counter,
772 WPA_REPLAY_COUNTER_LEN) == 0))
773 ctr[i].valid = FALSE;
774 }
775}
776
777
4ec1fd8e 778#ifdef CONFIG_IEEE80211R_AP
0f857f43
JM		 779static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
780 struct wpa_state_machine *sm,
781 struct wpa_eapol_ie_parse *kde)
782{
783 struct wpa_ie_data ie;
784 struct rsn_mdie *mdie;
785
786 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
787 ie.num_pmkid != 1 || ie.pmkid == NULL) {
788 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
789 "FT 4-way handshake message 2/4");
790 return -1;
791 }
792
793 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
794 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
795 sm->sup_pmk_r1_name, PMKID_LEN);
796
797 if (!kde->mdie || !kde->ftie) {
798 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
799 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
800 return -1;
801 }
802
803 mdie = (struct rsn_mdie *) (kde->mdie + 2);
804 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
805 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
806 MOBILITY_DOMAIN_ID_LEN) != 0) {
807 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
808 return -1;
809 }
810
811 if (sm->assoc_resp_ftie &&
812 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
813 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
814 2 + sm->assoc_resp_ftie[1]) != 0)) {
815 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
816 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
817 kde->ftie, kde->ftie_len);
818 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
819 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
820 return -1;
821 }
822
823 return 0;
824}
4ec1fd8e 825#endif /* CONFIG_IEEE80211R_AP */
0f857f43
JM		 826
827
c772d054
JM		 828static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
829 struct wpa_state_machine *sm, int group)
ec027805
JM		 830{
831 /* Supplicant reported a Michael MIC error */
832 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
833 "received EAPOL-Key Error Request "
834 "(STA detected Michael MIC failure (group=%d))",
835 group);
fbc72d32
JM		 836
837 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
838 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
839 "ignore Michael MIC failure report since "
840 "group cipher is not TKIP");
841 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
842 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
843 "ignore Michael MIC failure report since "
844 "pairwise cipher is not TKIP");
845 } else {
c772d054
JM		 846 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
847 return 1; /* STA entry was removed */
fbc72d32
JM		 848 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
849 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
850 }
ec027805
JM		 851
852 /*
853 * Error report is not a request for a new key handshake, but since
854 * Authenticator may do it, let's change the keys now anyway.
855 */
856 wpa_request_new_ptk(sm);
c772d054 857 return 0;
ec027805
JM		 858}
859
860
f23c5b17
JM		 861static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
862 size_t data_len)
863{
864 struct wpa_ptk PTK;
865 int ok = 0;
866 const u8 *pmk = NULL;
7a12edd1 867 size_t pmk_len;
dbfa691d 868 int vlan_id = 0;
f23c5b17 869
b729fd8d 870 os_memset(&PTK, 0, sizeof(PTK));
f23c5b17 871 for (;;) {
e61fea6b
JM		 872 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
873 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
f23c5b17 874 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
dbfa691d
JM		 875 sm->p2p_dev_addr, pmk, &pmk_len,
876 &vlan_id);
f23c5b17
JM		 877 if (pmk == NULL)
878 break;
f9854c18
MK		 879#ifdef CONFIG_IEEE80211R_AP
880 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
881 os_memcpy(sm->xxkey, pmk, pmk_len);
882 sm->xxkey_len = pmk_len;
883 }
884#endif /* CONFIG_IEEE80211R_AP */
207976f0 885 } else {
f23c5b17 886 pmk = sm->PMK;
207976f0
JM		 887 pmk_len = sm->pmk_len;
888 }
f23c5b17 889
364c064a
JM		 890 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
891 break;
f23c5b17 892
567da5bb
JM		 893 if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
894 data, data_len) == 0) {
08dc8efd
JM		 895 if (sm->PMK != pmk) {
896 os_memcpy(sm->PMK, pmk, pmk_len);
897 sm->pmk_len = pmk_len;
898 }
f23c5b17
JM		 899 ok = 1;
900 break;
901 }
902
f5e0a332
JM		 903 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
904 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
f23c5b17
JM		 905 break;
906 }
907
908 if (!ok) {
909 wpa_printf(MSG_DEBUG,
910 "WPA: Earlier SNonce did not result in matching MIC");
911 return -1;
912 }
913
914 wpa_printf(MSG_DEBUG,
915 "WPA: Earlier SNonce resulted in matching MIC");
916 sm->alt_snonce_valid = 0;
dbfa691d
JM		 917
918 if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
919 wpa_auth_update_vlan(sm->wpa_auth, sm->addr, vlan_id) < 0)
920 return -1;
921
f23c5b17
JM		 922 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
923 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
924 sm->PTK_valid = TRUE;
925
926 return 0;
927}
928
929
6fc6879b
JM		 930void wpa_receive(struct wpa_authenticator *wpa_auth,
931 struct wpa_state_machine *sm,
932 u8 *data, size_t data_len)
933{
934 struct ieee802_1x_hdr *hdr;
935 struct wpa_eapol_key *key;
936 u16 key_info, key_data_length;
a0bf1b68 937 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg;
6fc6879b
JM		 938 char *msgtxt;
939 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 940 const u8 *key_data;
941 size_t keyhdrlen, mic_len;
6d014ffc 942 u8 *mic;
6fc6879b
JM		 943
944 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
945 return;
dc5bad48 946 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 947
567da5bb 948 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 949 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 950
dc5bad48
JM		 951 if (data_len < sizeof(*hdr) + keyhdrlen) {
952 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 953 return;
dc5bad48 954 }
6fc6879b
JM		 955
956 hdr = (struct ieee802_1x_hdr *) data;
957 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 958 mic = (u8 *) (key + 1);
6fc6879b 959 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 960 key_data = mic + mic_len + 2;
961 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 962 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 963 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
964 MAC2STR(sm->addr), key_info, key->type,
965 (unsigned int) mic_len, key_data_length);
966 wpa_hexdump(MSG_MSGDUMP,
967 "WPA: EAPOL-Key header (ending before Key MIC)",
968 key, sizeof(*key));
969 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
970 mic, mic_len);
5e3b5197 971 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 972 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
973 "key_data overflow (%d > %lu)",
974 key_data_length,
975 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 976 keyhdrlen));
6fc6879b
JM		 977 return;
978 }
979
f8e96eb6 980 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 981 if (key->type == EAPOL_KEY_TYPE_WPA) {
982 /*
983 * Some deployed station implementations seem to send
984 * msg 4/4 with incorrect type value in WPA2 mode.
985 */
986 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
987 "with unexpected WPA type in RSN mode");
988 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 989 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
990 "unexpected type %d in RSN mode",
991 key->type);
992 return;
993 }
994 } else {
995 if (key->type != EAPOL_KEY_TYPE_WPA) {
996 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
997 "unexpected type %d in WPA mode",
998 key->type);
999 return;
1000 }
1001 }
1002
bc8318ac
JM		 1003 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
1004 WPA_NONCE_LEN);
1005 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
1006 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1007
6fc6879b
JM		 1008 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
1009 * are set */
1010
a0bf1b68
JM		 1011 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1012 wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message");
1013 return;
1014 }
1015
1016 if (key_info & WPA_KEY_INFO_REQUEST) {
6fc6879b
JM		 1017 msg = REQUEST;
1018 msgtxt = "Request";
1019 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1020 msg = GROUP_2;
1021 msgtxt = "2/2 Group";
3b5b7aa8
JM		 1022 } else if (key_data_length == 0 ||
1023 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
1024 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 1025 msg = PAIRWISE_4;
1026 msgtxt = "4/4 Pairwise";
1027 } else {
1028 msg = PAIRWISE_2;
1029 msgtxt = "2/4 Pairwise";
1030 }
1031
6fc6879b
JM		 1032 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1033 msg == GROUP_2) {
1034 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 1035 if (sm->pairwise == WPA_CIPHER_CCMP ||
1036 sm->pairwise == WPA_CIPHER_GCMP) {
4bc801ab
JM		 1037 if (wpa_use_cmac(sm->wpa_key_mgmt) &&
1038 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1039 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1040 wpa_auth_logger(wpa_auth, sm->addr,
1041 LOGGER_WARNING,
1042 "advertised support for "
1043 "AES-128-CMAC, but did not "
1044 "use it");
1045 return;
1046 }
1047
4bc801ab
JM		 1048 if (!wpa_use_cmac(sm->wpa_key_mgmt) &&
1049 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1050 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1051 wpa_auth_logger(wpa_auth, sm->addr,
1052 LOGGER_WARNING,
1053 "did not use HMAC-SHA1-AES "
eb7719ff 1054 "with CCMP/GCMP");
6fc6879b
JM		 1055 return;
1056 }
1057 }
929a2ea5 1058
4bc801ab 1059 if (wpa_use_akm_defined(sm->wpa_key_mgmt) &&
929a2ea5
JM		 1060 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1061 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1062 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1063 return;
1064 }
6fc6879b
JM		 1065 }
1066
1067 if (key_info & WPA_KEY_INFO_REQUEST) {
1068 if (sm->req_replay_counter_used &&
1069 os_memcmp(key->replay_counter, sm->req_replay_counter,
1070 WPA_REPLAY_COUNTER_LEN) <= 0) {
1071 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1072 "received EAPOL-Key request with "
1073 "replayed counter");
1074 return;
1075 }
1076 }
1077
1078 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1079 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1080 int i;
68921e24
JM		 1081
1082 if (msg == PAIRWISE_2 &&
1083 wpa_replay_counter_valid(sm->prev_key_replay,
1084 key->replay_counter) &&
1085 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1086 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1087 {
1088 /*
1089 * Some supplicant implementations (e.g., Windows XP
1090 * WZC) update SNonce for each EAPOL-Key 2/4. This
1091 * breaks the workaround on accepting any of the
1092 * pending requests, so allow the SNonce to be updated
1093 * even if we have already sent out EAPOL-Key 3/4.
1094 */
1095 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1096 "Process SNonce update from STA "
1097 "based on retransmitted EAPOL-Key "
1098 "1/4");
1099 sm->update_snonce = 1;
f23c5b17
JM		 1100 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1101 sm->alt_snonce_valid = TRUE;
1102 os_memcpy(sm->alt_replay_counter,
1103 sm->key_replay[0].counter,
1104 WPA_REPLAY_COUNTER_LEN);
1105 goto continue_processing;
1106 }
1107
1108 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1109 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1110 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1111 WPA_REPLAY_COUNTER_LEN) == 0) {
1112 /*
1113 * Supplicant may still be using the old SNonce since
1114 * there was two EAPOL-Key 2/4 messages and they had
1115 * different SNonce values.
1116 */
1117 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1118 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1119 goto continue_processing;
1120 }
1121
1122 if (msg == PAIRWISE_2 &&
1123 wpa_replay_counter_valid(sm->prev_key_replay,
1124 key->replay_counter) &&
1125 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1126 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1127 "ignore retransmitted EAPOL-Key %s - "
1128 "SNonce did not change", msgtxt);
1129 } else {
1130 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1131 "received EAPOL-Key %s with "
1132 "unexpected replay counter", msgtxt);
1133 }
22a299ee
JM		 1134 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1135 if (!sm->key_replay[i].valid)
1136 break;
1137 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1138 sm->key_replay[i].counter,
1139 WPA_REPLAY_COUNTER_LEN);
1140 }
6fc6879b
JM		 1141 wpa_hexdump(MSG_DEBUG, "received replay counter",
1142 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1143 return;
1144 }
1145
68921e24 1146continue_processing:
3b5b7aa8
JM		 1147#ifdef CONFIG_FILS
1148 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1149 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1150 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1151 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1152 return;
1153 }
1154#endif /* CONFIG_FILS */
1155
6fc6879b
JM		 1156 switch (msg) {
1157 case PAIRWISE_2:
1158 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1159 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1160 (!sm->update_snonce ||
1161 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1162 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1163 "received EAPOL-Key msg 2/4 in "
1164 "invalid state (%d) - dropped",
1165 sm->wpa_ptk_state);
1166 return;
1167 }
bbb921da 1168 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1169 if (sm->group->reject_4way_hs_for_entropy) {
1170 /*
1171 * The system did not have enough entropy to generate
1172 * strong random numbers. Reject the first 4-way
1173 * handshake(s) and collect some entropy based on the
1174 * information from it. Once enough entropy is
1175 * available, the next atempt will trigger GMK/Key
1176 * Counter update and the station will be allowed to
1177 * continue.
1178 */
1179 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1180 "collect more entropy for random number "
1181 "generation");
08704cd8 1182 random_mark_pool_ready();
567da5bb
JM		 1183 wpa_sta_disconnect(wpa_auth, sm->addr,
1184 WLAN_REASON_PREV_AUTH_NOT_VALID);
08704cd8
JM		 1185 return;
1186 }
6fc6879b
JM		 1187 break;
1188 case PAIRWISE_4:
1189 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1190 !sm->PTK_valid) {
1191 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1192 "received EAPOL-Key msg 4/4 in "
1193 "invalid state (%d) - dropped",
1194 sm->wpa_ptk_state);
1195 return;
1196 }
1197 break;
1198 case GROUP_2:
1199 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1200 || !sm->PTK_valid) {
1201 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1202 "received EAPOL-Key msg 2/2 in "
1203 "invalid state (%d) - dropped",
1204 sm->wpa_ptk_group_state);
1205 return;
1206 }
1207 break;
6fc6879b
JM		 1208 case REQUEST:
1209 break;
1210 }
1211
1212 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1213 "received EAPOL-Key frame (%s)", msgtxt);
1214
1215 if (key_info & WPA_KEY_INFO_ACK) {
1216 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1217 "received invalid EAPOL-Key: Key Ack set");
1218 return;
1219 }
1220
b9866483
JM		 1221 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1222 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1223 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1224 "received invalid EAPOL-Key: Key MIC not set");
1225 return;
1226 }
1227
b9866483
JM		 1228#ifdef CONFIG_FILS
1229 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1230 (key_info & WPA_KEY_INFO_MIC)) {
1231 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1232 "received invalid EAPOL-Key: Key MIC set");
1233 return;
1234 }
1235#endif /* CONFIG_FILS */
1236
6fc6879b 1237 sm->MICVerified = FALSE;
68921e24 1238 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8 1239 if (mic_len &&
567da5bb
JM		 1240 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1241 data, data_len) &&
f23c5b17
JM		 1242 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1243 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1244 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1245 "received EAPOL-Key with invalid MIC");
525923b1
JM		 1246#ifdef TEST_FUZZ
1247 wpa_printf(MSG_INFO,
1248 "TEST: Ignore Key MIC failure for fuzz testing");
1249 goto continue_fuzz;
1250#endif /* TEST_FUZZ */
6fc6879b
JM		 1251 return;
1252 }
75c8563e
JM		 1253#ifdef CONFIG_FILS
1254 if (!mic_len &&
1255 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1256 &key_data_length) < 0) {
1257 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1258 "received EAPOL-Key with invalid MIC");
525923b1
JM		 1259#ifdef TEST_FUZZ
1260 wpa_printf(MSG_INFO,
1261 "TEST: Ignore Key MIC failure for fuzz testing");
1262 goto continue_fuzz;
1263#endif /* TEST_FUZZ */
75c8563e
JM		 1264 return;
1265 }
1266#endif /* CONFIG_FILS */
525923b1
JM		 1267#ifdef TEST_FUZZ
1268 continue_fuzz:
1269#endif /* TEST_FUZZ */
6fc6879b
JM		 1270 sm->MICVerified = TRUE;
1271 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1272 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1273 }
1274
1275 if (key_info & WPA_KEY_INFO_REQUEST) {
1276 if (sm->MICVerified) {
1277 sm->req_replay_counter_used = 1;
1278 os_memcpy(sm->req_replay_counter, key->replay_counter,
1279 WPA_REPLAY_COUNTER_LEN);
1280 } else {
1281 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1282 "received EAPOL-Key request with "
1283 "invalid MIC");
1284 return;
1285 }
1286
1287 /*
1288 * TODO: should decrypt key data field if encryption was used;
1289 * even though MAC address KDE is not normally encrypted,
1290 * supplicant is allowed to encrypt it.
1291 */
a0bf1b68 1292 if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1293 if (wpa_receive_error_report(
1294 wpa_auth, sm,
1295 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1296 return; /* STA entry was removed */
6fc6879b
JM		 1297 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1298 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1299 "received EAPOL-Key Request for new "
1300 "4-Way Handshake");
1301 wpa_request_new_ptk(sm);
6fc6879b 1302 } else if (key_data_length > 0 &&
5e3b5197
JM		 1303 wpa_parse_kde_ies(key_data, key_data_length,
1304 &kde) == 0 &&
6fc6879b
JM		 1305 kde.mac_addr) {
1306 } else {
1307 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1308 "received EAPOL-Key Request for GTK "
1309 "rekeying");
6fc6879b
JM		 1310 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1311 wpa_rekey_gtk(wpa_auth, NULL);
1312 }
1313 } else {
68921e24
JM		 1314 /* Do not allow the same key replay counter to be reused. */
1315 wpa_replay_counter_mark_invalid(sm->key_replay,
1316 key->replay_counter);
1317
1318 if (msg == PAIRWISE_2) {
1319 /*
1320 * Maintain a copy of the pending EAPOL-Key frames in
1321 * case the EAPOL-Key frame was retransmitted. This is
1322 * needed to allow EAPOL-Key msg 2/4 reply to another
1323 * pending msg 1/4 to update the SNonce to work around
1324 * unexpected supplicant behavior.
1325 */
1326 os_memcpy(sm->prev_key_replay, sm->key_replay,
1327 sizeof(sm->key_replay));
1328 } else {
1329 os_memset(sm->prev_key_replay, 0,
1330 sizeof(sm->prev_key_replay));
1331 }
1332
1333 /*
1334 * Make sure old valid counters are not accepted anymore and
1335 * do not get copied again.
1336 */
1337 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1338 }
1339
6fc6879b 1340 os_free(sm->last_rx_eapol_key);
a1f11e34 1341 sm->last_rx_eapol_key = os_memdup(data, data_len);
6fc6879b
JM		 1342 if (sm->last_rx_eapol_key == NULL)
1343 return;
6fc6879b
JM		 1344 sm->last_rx_eapol_key_len = data_len;
1345
0d442aff 1346 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1347 sm->EAPOLKeyReceived = TRUE;
1348 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1349 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1350 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1351 wpa_sm_step(sm);
1352}
1353
1354
3c7302c2
JM		 1355static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1356 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1357{
c6eb3e34 1358 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN];
5cb9d5c3 1359 u8 *pos;
3c7302c2 1360 int ret = 0;
6fc6879b 1361
5cb9d5c3
JM		 1362 /* GTK = PRF-X(GMK, "Group key expansion",
1363 * AA || GNonce || Time || random data)
1364 * The example described in the IEEE 802.11 standard uses only AA and
1365 * GNonce as inputs here. Add some more entropy since this derivation
1366 * is done only at the Authenticator and as such, does not need to be
1367 * exactly same.
1368 */
c6eb3e34 1369 os_memset(data, 0, sizeof(data));
6fc6879b
JM		 1370 os_memcpy(data, addr, ETH_ALEN);
1371 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1372 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1373 wpa_get_ntp_timestamp(pos);
525923b1
JM		 1374#ifdef TEST_FUZZ
1375 os_memset(pos, 0xef, 8);
1376#endif /* TEST_FUZZ */
5cb9d5c3 1377 pos += 8;
c6eb3e34 1378 if (random_get_bytes(pos, gtk_len) < 0)
3c7302c2 1379 ret = -1;
6fc6879b 1380
c6eb3e34
JM		 1381#ifdef CONFIG_SHA384
1382 if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1383 gtk, gtk_len) < 0)
3c7302c2 1384 ret = -1;
c6eb3e34
JM		 1385#else /* CONFIG_SHA384 */
1386#ifdef CONFIG_SHA256
1387 if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1388 gtk, gtk_len) < 0)
1389 ret = -1;
1390#else /* CONFIG_SHA256 */
1391 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1392 gtk, gtk_len) < 0)
1393 ret = -1;
1394#endif /* CONFIG_SHA256 */
1395#endif /* CONFIG_SHA384 */
3c7302c2
JM		 1396
1397 return ret;
6fc6879b
JM		 1398}
1399
1400
1401static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1402{
1403 struct wpa_authenticator *wpa_auth = eloop_ctx;
1404 struct wpa_state_machine *sm = timeout_ctx;
1405
e4bf4db9 1406 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1407 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1408 sm->TimeoutEvt = TRUE;
1409 wpa_sm_step(sm);
1410}
1411
1412
1413void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1414 struct wpa_state_machine *sm, int key_info,
1415 const u8 *key_rsc, const u8 *nonce,
1416 const u8 *kde, size_t kde_len,
1417 int keyidx, int encr, int force_version)
1418{
1419 struct ieee802_1x_hdr *hdr;
1420 struct wpa_eapol_key *key;
5e3b5197 1421 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1422 int alg;
1423 int key_data_len, pad_len = 0;
1424 u8 *buf, *pos;
1425 int version, pairwise;
22a299ee 1426 int i;
6d014ffc 1427 u8 *key_mic, *key_data;
6fc6879b 1428
567da5bb 1429 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 1430 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1431
1432 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1433
1434 if (force_version)
1435 version = force_version;
4bc801ab 1436 else if (wpa_use_akm_defined(sm->wpa_key_mgmt))
a14896e8 1437 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
4bc801ab 1438 else if (wpa_use_cmac(sm->wpa_key_mgmt))
6fc6879b 1439 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1440 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1441 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1442 else
1443 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1444
8543ed8a 1445 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1446
1447 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1448 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1449 "encr=%d)",
1450 version,
1451 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1452 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1453 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1454 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1455 pairwise, (unsigned long) kde_len, keyidx, encr);
1456
1457 key_data_len = kde_len;
1458
1459 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1460 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1461 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1462 pad_len = key_data_len % 8;
1463 if (pad_len)
1464 pad_len = 8 - pad_len;
1465 key_data_len += pad_len + 8;
1466 }
1467
1468 len += key_data_len;
b729fd8d
JM		 1469 if (!mic_len && encr)
1470 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1471
1472 hdr = os_zalloc(len);
1473 if (hdr == NULL)
1474 return;
1475 hdr->version = wpa_auth->conf.eapol_version;
1476 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1477 hdr->length = host_to_be16(len - sizeof(*hdr));
1478 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1479 key_mic = (u8 *) (key + 1);
5e3b5197 1480 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1481
1482 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1483 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1484 key_info |= version;
1485 if (encr && sm->wpa == WPA_VERSION_WPA2)
1486 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1487 if (sm->wpa != WPA_VERSION_WPA2)
1488 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1489 WPA_PUT_BE16(key->key_info, key_info);
1490
1491 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
a0bf1b68 1492 if (sm->wpa == WPA_VERSION_WPA2 && !pairwise)
6fc6879b 1493 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1494 else
1495 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b 1496
22a299ee
JM		 1497 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1498 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1499 os_memcpy(sm->key_replay[i].counter,
1500 sm->key_replay[i - 1].counter,
1501 WPA_REPLAY_COUNTER_LEN);
1502 }
1503 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1504 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1505 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1506 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1507 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1508 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1509
1510 if (nonce)
1511 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1512
1513 if (key_rsc)
1514 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1515
1516 if (kde && !encr) {
5e3b5197 1517 os_memcpy(key_data, kde, kde_len);
6d014ffc 1518 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d 1519#ifdef CONFIG_FILS
c05f96a3 1520 } else if (!mic_len && kde) {
b729fd8d
JM		 1521 const u8 *aad[1];
1522 size_t aad_len[1];
1523
1524 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1525 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1526 kde, kde_len);
1527
1528 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1529 sm->PTK.kek, sm->PTK.kek_len);
1530 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1531 * to Key Data (exclusive). */
1532 aad[0] = (u8 *) hdr;
1533 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1534 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1535 1, aad, aad_len, key_mic + 2) < 0) {
1536 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1537 return;
1538 }
1539
1540 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1541 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1542#endif /* CONFIG_FILS */
6fc6879b
JM		 1543 } else if (encr && kde) {
1544 buf = os_zalloc(key_data_len);
1545 if (buf == NULL) {
1546 os_free(hdr);
1547 return;
1548 }
1549 pos = buf;
1550 os_memcpy(pos, kde, kde_len);
1551 pos += kde_len;
1552
1553 if (pad_len)
1554 *pos++ = 0xdd;
1555
1556 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1557 buf, key_data_len);
1558 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1559 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b 1560 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
ef9627cb
JM		 1561 wpa_printf(MSG_DEBUG,
1562 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1563 (unsigned int) sm->PTK.kek_len);
98cd3d1c 1564 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1565 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1566 os_free(hdr);
1567 os_free(buf);
1568 return;
1569 }
6d014ffc 1570 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1571#ifndef CONFIG_NO_RC4
98cd3d1c 1572 } else if (sm->PTK.kek_len == 16) {
6fc6879b 1573 u8 ek[32];
ef9627cb
JM		 1574
1575 wpa_printf(MSG_DEBUG,
1576 "WPA: Encrypt Key Data using RC4");
6fc6879b
JM		 1577 os_memcpy(key->key_iv,
1578 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1579 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1580 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1581 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1582 os_memcpy(key_data, buf, key_data_len);
1583 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1584 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1585#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1586 } else {
1587 os_free(hdr);
1588 os_free(buf);
1589 return;
6fc6879b
JM		 1590 }
1591 os_free(buf);
1592 }
1593
1594 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1595 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1596 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1597 "PTK not valid when sending EAPOL-Key "
1598 "frame");
1599 os_free(hdr);
1600 return;
1601 }
5e3b5197 1602
beae255a
JM		 1603 if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1604 sm->wpa_key_mgmt, version,
1605 (u8 *) hdr, len, key_mic) < 0) {
1606 os_free(hdr);
1607 return;
1608 }
7af092a0
JB		 1609#ifdef CONFIG_TESTING_OPTIONS
1610 if (!pairwise &&
06df2aa6 1611 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1612 drand48() <
1613 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1614 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1615 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1616 key_mic[0]++;
7af092a0
JB		 1617 }
1618#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1619 }
1620
1621 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1622 1);
1623 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1624 sm->pairwise_set);
1625 os_free(hdr);
1626}
1627
1628
1629static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1630 struct wpa_state_machine *sm, int key_info,
1631 const u8 *key_rsc, const u8 *nonce,
1632 const u8 *kde, size_t kde_len,
1633 int keyidx, int encr)
1634{
1635 int timeout_ms;
1636 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1637 u32 ctr;
6fc6879b
JM		 1638
1639 if (sm == NULL)
1640 return;
1641
1642 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1643 keyidx, encr, 0);
1644
bae61562 1645 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1646 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1647 timeout_ms = pairwise ? eapol_key_timeout_first :
1648 eapol_key_timeout_first_group;
bae61562
JM		 1649 else
1650 timeout_ms = eapol_key_timeout_subseq;
6f234c1e
JM		 1651 if (wpa_auth->conf.wpa_disable_eapol_key_retries &&
1652 (!pairwise || (key_info & WPA_KEY_INFO_MIC)))
1653 timeout_ms = eapol_key_timeout_no_retrans;
e4bf4db9
JM		 1654 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1655 sm->pending_1_of_4_timeout = 1;
525923b1
JM		 1656#ifdef TEST_FUZZ
1657 timeout_ms = 1;
1658#endif /* TEST_FUZZ */
e4bf4db9 1659 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1660 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1661 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1662 wpa_send_eapol_timeout, wpa_auth, sm);
1663}
1664
1665
567da5bb
JM		 1666static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1667 u8 *data, size_t data_len)
6fc6879b
JM		 1668{
1669 struct ieee802_1x_hdr *hdr;
1670 struct wpa_eapol_key *key;
1671 u16 key_info;
1672 int ret = 0;
6d014ffc 1673 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
567da5bb 1674 size_t mic_len = wpa_mic_len(akmp, pmk_len);
6fc6879b
JM		 1675
1676 if (data_len < sizeof(*hdr) + sizeof(*key))
1677 return -1;
1678
1679 hdr = (struct ieee802_1x_hdr *) data;
1680 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1681 mic_pos = (u8 *) (key + 1);
6fc6879b 1682 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1683 os_memcpy(mic, mic_pos, mic_len);
1684 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1685 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1686 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1687 data, data_len, mic_pos) ||
1688 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1689 ret = -1;
6d014ffc 1690 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1691 return ret;
1692}
1693
1694
1695void wpa_remove_ptk(struct wpa_state_machine *sm)
1696{
1697 sm->PTK_valid = FALSE;
1698 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1699 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1700 0))
1701 wpa_printf(MSG_DEBUG,
1702 "RSN: PTK removal from the driver failed");
6fc6879b 1703 sm->pairwise_set = FALSE;
581a8cde 1704 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1705}
1706
1707
bb119228 1708int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1709{
5d22a1d5
JM		 1710 int remove_ptk = 1;
1711
6fc6879b 1712 if (sm == NULL)
6f9b5d16 1713 return -1;
6fc6879b
JM		 1714
1715 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1716 "event %d notification", event);
1717
1718 switch (event) {
1719 case WPA_AUTH:
c50d94f1
BC		 1720#ifdef CONFIG_MESH
1721 /* PTKs are derived through AMPE */
1722 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1723 /* not mesh */
1724 break;
1725 }
1726 return 0;
1727#endif /* CONFIG_MESH */
6fc6879b
JM		 1728 case WPA_ASSOC:
1729 break;
1730 case WPA_DEAUTH:
1731 case WPA_DISASSOC:
1732 sm->DeauthenticationRequest = TRUE;
1733 break;
1734 case WPA_REAUTH:
1735 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1736 if (!sm->started) {
1737 /*
1738 * When using WPS, we may end up here if the STA
1739 * manages to re-associate without the previous STA
1740 * entry getting removed. Consequently, we need to make
1741 * sure that the WPA state machines gets initialized
1742 * properly at this point.
1743 */
1744 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1745 "started - initialize now");
1746 sm->started = 1;
1747 sm->Init = TRUE;
1748 if (wpa_sm_step(sm) == 1)
1749 return 1; /* should not really happen */
1750 sm->Init = FALSE;
1751 sm->AuthenticationRequest = TRUE;
1752 break;
1753 }
9663596f
JM		 1754 if (sm->GUpdateStationKeys) {
1755 /*
1756 * Reauthentication cancels the pending group key
1757 * update for this STA.
1758 */
1759 sm->group->GKeyDoneStations--;
1760 sm->GUpdateStationKeys = FALSE;
1761 sm->PtkGroupInit = TRUE;
1762 }
6fc6879b
JM		 1763 sm->ReAuthenticationRequest = TRUE;
1764 break;
1765 case WPA_ASSOC_FT:
4ec1fd8e 1766#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1767 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1768 "after association");
1769 wpa_ft_install_ptk(sm);
1770
6fc6879b
JM		 1771 /* Using FT protocol, not WPA auth state machine */
1772 sm->ft_completed = 1;
6f9b5d16 1773 return 0;
4ec1fd8e 1774#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1775 break;
4ec1fd8e 1776#endif /* CONFIG_IEEE80211R_AP */
957bff83
JM		 1777 case WPA_ASSOC_FILS:
1778#ifdef CONFIG_FILS
1779 wpa_printf(MSG_DEBUG,
1780 "FILS: TK configuration after association");
1781 fils_set_tk(sm);
1782 sm->fils_completed = 1;
1783 return 0;
1784#else /* CONFIG_FILS */
1785 break;
1786#endif /* CONFIG_FILS */
0e3bd7ac
MV		 1787 case WPA_DRV_STA_REMOVED:
1788 sm->tk_already_set = FALSE;
1789 return 0;
6fc6879b
JM		 1790 }
1791
4ec1fd8e 1792#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1793 sm->ft_completed = 0;
4ec1fd8e 1794#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1795
5d22a1d5
JM		 1796#ifdef CONFIG_IEEE80211W
1797 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1798 remove_ptk = 0;
1799#endif /* CONFIG_IEEE80211W */
78815f3d 1800#ifdef CONFIG_FILS
da24c5aa
JM		 1801 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1802 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1803 remove_ptk = 0;
1804#endif /* CONFIG_FILS */
6fc6879b 1805
5d22a1d5
JM		 1806 if (remove_ptk) {
1807 sm->PTK_valid = FALSE;
1808 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1809
1810 if (event != WPA_REAUTH_EAPOL)
1811 wpa_remove_ptk(sm);
1812 }
6fc6879b 1813
43f49c37
JM		 1814 if (sm->in_step_loop) {
1815 /*
1816 * wpa_sm_step() is already running - avoid recursive call to
1817 * it by making the existing loop process the new update.
1818 */
1819 sm->changed = TRUE;
1820 return 0;
1821 }
6f9b5d16 1822 return wpa_sm_step(sm);
6fc6879b
JM		 1823}
1824
1825
6fc6879b
JM		 1826SM_STATE(WPA_PTK, INITIALIZE)
1827{
1828 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1829 if (sm->Init) {
1830 /* Init flag is not cleared here, so avoid busy
1831 * loop by claiming nothing changed. */
1832 sm->changed = FALSE;
1833 }
1834
1835 sm->keycount = 0;
1836 if (sm->GUpdateStationKeys)
1837 sm->group->GKeyDoneStations--;
1838 sm->GUpdateStationKeys = FALSE;
1839 if (sm->wpa == WPA_VERSION_WPA)
1840 sm->PInitAKeys = FALSE;
1841 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1842 * Local AA > Remote AA)) */) {
1843 sm->Pair = TRUE;
1844 }
1845 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1846 wpa_remove_ptk(sm);
1847 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1848 sm->TimeoutCtr = 0;
a1ea1b45 1849 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 1850 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 1851 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 1852 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1853 WPA_EAPOL_authorized, 0);
1854 }
1855}
1856
1857
1858SM_STATE(WPA_PTK, DISCONNECT)
1859{
567da5bb
JM		 1860 u16 reason = sm->disconnect_reason;
1861
6fc6879b
JM		 1862 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1863 sm->Disconnect = FALSE;
567da5bb
JM		 1864 sm->disconnect_reason = 0;
1865 if (!reason)
1866 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1867 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
6fc6879b
JM		 1868}
1869
1870
1871SM_STATE(WPA_PTK, DISCONNECTED)
1872{
1873 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1874 sm->DeauthenticationRequest = FALSE;
1875}
1876
1877
1878SM_STATE(WPA_PTK, AUTHENTICATION)
1879{
1880 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1881 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1882 sm->PTK_valid = FALSE;
1883 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1884 1);
1885 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1886 sm->AuthenticationRequest = FALSE;
1887}
1888
1889
40d00d2b
NC		 1890static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1891 struct wpa_group *group)
1bdb7ab3 1892{
40d00d2b
NC		 1893 if (group->first_sta_seen)
1894 return;
1bdb7ab3
JM		 1895 /*
1896 * System has run bit further than at the time hostapd was started
1897 * potentially very early during boot up. This provides better chances
1898 * of collecting more randomness on embedded systems. Re-initialize the
1899 * GMK and Counter here to improve their strength if there was not
1900 * enough entropy available immediately after system startup.
1901 */
1902 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1903 "station");
08704cd8
JM		 1904 if (random_pool_ready() != 1) {
1905 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1906 "to proceed - reject first 4-way handshake");
1907 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1908 } else {
1909 group->first_sta_seen = TRUE;
1910 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1911 }
40d00d2b 1912
aac1efec
JM		 1913 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1914 wpa_gtk_update(wpa_auth, group) < 0 ||
1915 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1916 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1917 group->first_sta_seen = FALSE;
1918 group->reject_4way_hs_for_entropy = TRUE;
1919 }
1bdb7ab3
JM		 1920}
1921
1922
6fc6879b
JM		 1923SM_STATE(WPA_PTK, AUTHENTICATION2)
1924{
1925 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1926
40d00d2b 1927 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1928 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1929
3825a19b
JM		 1930 /*
1931 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1932 * ambiguous. The Authenticator state machine uses a counter that is
1933 * incremented by one for each 4-way handshake. However, the security
1934 * analysis of 4-way handshake points out that unpredictable nonces
1935 * help in preventing precomputation attacks. Instead of the state
1936 * machine definition, use an unpredictable nonce value here to provide
1937 * stronger protection against potential precomputation attacks.
1938 */
1939 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1940 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1941 "ANonce.");
65a32cdb 1942 sm->Disconnect = TRUE;
3825a19b
JM		 1943 return;
1944 }
bc8318ac
JM		 1945 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1946 WPA_NONCE_LEN);
6fc6879b
JM		 1947 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1948 * logical place than INITIALIZE since AUTHENTICATION2 can be
1949 * re-entered on ReAuthenticationRequest without going through
1950 * INITIALIZE. */
1951 sm->TimeoutCtr = 0;
1952}
1953
1954
0adc9b28
JM		 1955static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1956{
1957 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1958 wpa_printf(MSG_ERROR,
1959 "WPA: Failed to get random data for ANonce");
1960 sm->Disconnect = TRUE;
1961 return -1;
1962 }
1963 wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1964 WPA_NONCE_LEN);
1965 sm->TimeoutCtr = 0;
1966 return 0;
1967}
1968
1969
6fc6879b
JM		 1970SM_STATE(WPA_PTK, INITPMK)
1971{
1972 u8 msk[2 * PMK_LEN];
1973 size_t len = 2 * PMK_LEN;
1974
1975 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1976#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1977 sm->xxkey_len = 0;
4ec1fd8e 1978#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1979 if (sm->pmksa) {
1980 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1981 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1982 sm->pmk_len = sm->pmksa->pmk_len;
567da5bb
JM		 1983#ifdef CONFIG_DPP
1984 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
1985 wpa_printf(MSG_DEBUG,
1986 "DPP: No PMKSA cache entry for STA - reject connection");
1987 sm->Disconnect = TRUE;
1988 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
1989 return;
1990#endif /* CONFIG_DPP */
6fc6879b 1991 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1992 unsigned int pmk_len;
1993
834c5d68 1994 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
207976f0
JM		 1995 pmk_len = PMK_LEN_SUITE_B_192;
1996 else
1997 pmk_len = PMK_LEN;
6fc6879b 1998 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1999 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
2000 pmk_len);
2001 if (len < pmk_len) {
2002 wpa_printf(MSG_DEBUG,
2003 "WPA: MSK not long enough (%u) to create PMK (%u)",
2004 (unsigned int) len, (unsigned int) pmk_len);
2005 sm->Disconnect = TRUE;
2006 return;
2007 }
2008 os_memcpy(sm->PMK, msk, pmk_len);
2009 sm->pmk_len = pmk_len;
4ec1fd8e 2010#ifdef CONFIG_IEEE80211R_AP
6fc6879b 2011 if (len >= 2 * PMK_LEN) {
9f12271b
JM		 2012 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
2013 os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN);
2014 sm->xxkey_len = SHA384_MAC_LEN;
2015 } else {
2016 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
2017 sm->xxkey_len = PMK_LEN;
2018 }
6fc6879b 2019 }
4ec1fd8e 2020#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2021 } else {
400de9b1 2022 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 2023 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 2024 sm->Disconnect = TRUE;
2025 return;
6fc6879b 2026 }
40aaa64f 2027 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 2028
2029 sm->req_replay_counter_used = 0;
2030 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
2031 * will break reauthentication since EAPOL state machines may not be
2032 * get into AUTHENTICATING state that clears keyRun before WPA state
2033 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
2034 * state and takes PMK from the previously used AAA Key. This will
2035 * eventually fail in 4-Way Handshake because Supplicant uses PMK
2036 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
2037 * be good workaround for this issue. */
2038 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
2039}
2040
2041
2042SM_STATE(WPA_PTK, INITPSK)
2043{
2044 const u8 *psk;
7a12edd1
JM		 2045 size_t psk_len;
2046
6fc6879b 2047 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
7a12edd1 2048 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
dbfa691d 2049 &psk_len, NULL);
6fc6879b 2050 if (psk) {
7a12edd1
JM		 2051 os_memcpy(sm->PMK, psk, psk_len);
2052 sm->pmk_len = psk_len;
4ec1fd8e 2053#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 2054 os_memcpy(sm->xxkey, psk, PMK_LEN);
2055 sm->xxkey_len = PMK_LEN;
4ec1fd8e 2056#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2057 }
e61fea6b
JM		 2058#ifdef CONFIG_SAE
2059 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2060 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2061 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2062 sm->pmk_len = sm->pmksa->pmk_len;
6fe3f0f7 2063#ifdef CONFIG_IEEE80211R_AP
2064 os_memcpy(sm->xxkey, sm->pmksa->pmk, sm->pmksa->pmk_len);
2065 sm->xxkey_len = sm->pmksa->pmk_len;
2066#endif /* CONFIG_IEEE80211R_AP */
e61fea6b
JM		 2067 }
2068#endif /* CONFIG_SAE */
6fc6879b
JM		 2069 sm->req_replay_counter_used = 0;
2070}
2071
2072
2073SM_STATE(WPA_PTK, PTKSTART)
2074{
2075 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2076 size_t pmkid_len = 0;
2077
2078 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2079 sm->PTKRequest = FALSE;
2080 sm->TimeoutEvt = FALSE;
f23c5b17 2081 sm->alt_snonce_valid = FALSE;
bae61562
JM		 2082
2083 sm->TimeoutCtr++;
41f140d3 2084 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2085 /* No point in sending the EAPOL-Key - we will disconnect
2086 * immediately following this. */
2087 return;
2088 }
2089
6fc6879b
JM		 2090 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2091 "sending 1/4 msg of 4-Way Handshake");
2092 /*
c6e1a9a0
JM		 2093 * For infrastructure BSS cases, it is better for the AP not to include
2094 * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate
2095 * offline search for the passphrase/PSK without having to be able to
2096 * capture a 4-way handshake from a STA that has access to the network.
2097 *
2098 * For IBSS cases, addition of PMKID KDE could be considered even with
2099 * WPA2-PSK cases that use multiple PSKs, but only if there is a single
2100 * possible PSK for this STA. However, this should not be done unless
2101 * there is support for using that information on the supplicant side.
2102 * The concern about exposing PMKID unnecessarily in infrastructure BSS
2103 * cases would also apply here, but at least in the IBSS case, this
2104 * would cover a potential real use case.
6fc6879b
JM		 2105 */
2106 if (sm->wpa == WPA_VERSION_WPA2 &&
e61fea6b 2107 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
d90f10fa 2108 (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
e61fea6b 2109 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
a14896e8 2110 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2111 pmkid = buf;
2112 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2113 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2114 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2115 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2116 if (sm->pmksa) {
9d94e4bb
JM		 2117 wpa_hexdump(MSG_DEBUG,
2118 "RSN: Message 1/4 PMKID from PMKSA entry",
2119 sm->pmksa->pmkid, PMKID_LEN);
6fc6879b
JM		 2120 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2121 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2122 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2123 /* No KCK available to derive PMKID */
9d94e4bb
JM		 2124 wpa_printf(MSG_DEBUG,
2125 "RSN: No KCK available to derive PMKID for message 1/4");
929a2ea5 2126 pmkid = NULL;
9d94e4bb
JM		 2127#ifdef CONFIG_SAE
2128 } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2129 if (sm->pmkid_set) {
2130 wpa_hexdump(MSG_DEBUG,
2131 "RSN: Message 1/4 PMKID from SAE",
2132 sm->pmkid, PMKID_LEN);
2133 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2134 sm->pmkid, PMKID_LEN);
2135 } else {
2136 /* No PMKID available */
2137 wpa_printf(MSG_DEBUG,
2138 "RSN: No SAE PMKID available for message 1/4");
2139 pmkid = NULL;
2140 }
2141#endif /* CONFIG_SAE */
929a2ea5 2142 } else {
6fc6879b
JM		 2143 /*
2144 * Calculate PMKID since no PMKSA cache entry was
2145 * available with pre-calculated PMKID.
2146 */
207976f0 2147 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197 2148 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
41b81914 2149 sm->wpa_key_mgmt);
9d94e4bb
JM		 2150 wpa_hexdump(MSG_DEBUG,
2151 "RSN: Message 1/4 PMKID derived from PMK",
2152 &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN);
6fc6879b
JM		 2153 }
2154 }
2155 wpa_send_eapol(sm->wpa_auth, sm,
2156 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2157 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2158}
2159
2160
f23c5b17 2161static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2162 const u8 *pmk, unsigned int pmk_len,
2163 struct wpa_ptk *ptk)
6fc6879b 2164{
10ec6a5f
JM		 2165 const u8 *z = NULL;
2166 size_t z_len = 0;
2167
4ec1fd8e 2168#ifdef CONFIG_IEEE80211R_AP
56586197 2169 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
98cd3d1c 2170 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
4ec1fd8e 2171#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2172
10ec6a5f
JM		 2173#ifdef CONFIG_DPP2
2174 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) {
2175 z = wpabuf_head(sm->dpp_z);
2176 z_len = wpabuf_len(sm->dpp_z);
2177 }
2178#endif /* CONFIG_DPP2 */
2179
207976f0 2180 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c 2181 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
10ec6a5f 2182 ptk, sm->wpa_key_mgmt, sm->pairwise, z, z_len);
6fc6879b
JM		 2183}
2184
2185
3b5b7aa8 2186#ifdef CONFIG_FILS
c4fd6d8a
JM		 2187
2188int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
80ddf5d9 2189 size_t pmk_len, const u8 *snonce, const u8 *anonce,
4cada9dc 2190 const u8 *dhss, size_t dhss_len,
80ddf5d9 2191 struct wpabuf *g_sta, struct wpabuf *g_ap)
c4fd6d8a
JM		 2192{
2193 u8 ick[FILS_ICK_MAX_LEN];
2194 size_t ick_len;
2195 int res;
8fed47e0
JM		 2196 u8 fils_ft[FILS_FT_MAX_LEN];
2197 size_t fils_ft_len = 0;
c4fd6d8a
JM		 2198
2199 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
4cada9dc
JM		 2200 snonce, anonce, dhss, dhss_len,
2201 &sm->PTK, ick, &ick_len,
8fed47e0
JM		 2202 sm->wpa_key_mgmt, sm->pairwise,
2203 fils_ft, &fils_ft_len);
c4fd6d8a
JM		 2204 if (res < 0)
2205 return res;
2206 sm->PTK_valid = TRUE;
2f1357fb 2207 sm->tk_already_set = FALSE;
c4fd6d8a 2208
8fed47e0
JM		 2209#ifdef CONFIG_IEEE80211R_AP
2210 if (fils_ft_len) {
2211 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2212 struct wpa_auth_config *conf = &wpa_auth->conf;
994eac7e
JM		 2213 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2214 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2215 size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
8fed47e0
JM		 2216
2217 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2218 conf->ssid, conf->ssid_len,
2219 conf->mobility_domain,
2220 conf->r0_key_holder,
2221 conf->r0_key_holder_len,
994eac7e
JM		 2222 sm->addr, pmk_r0, pmk_r0_name,
2223 use_sha384) < 0)
8fed47e0
JM		 2224 return -1;
2225
994eac7e
JM		 2226 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
2227 pmk_r0, pmk_r0_len);
8fed47e0
JM		 2228 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2229 pmk_r0_name, WPA_PMK_NAME_LEN);
89dea17e 2230 wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name);
8fed47e0 2231 os_memset(fils_ft, 0, sizeof(fils_ft));
36536639
JM		 2232
2233 res = wpa_derive_pmk_r1_name(pmk_r0_name, conf->r1_key_holder,
2234 sm->addr, sm->pmk_r1_name,
2235 use_sha384);
2236 os_memset(pmk_r0, 0, PMK_LEN_MAX);
2237 if (res < 0)
2238 return -1;
2239 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name,
2240 WPA_PMK_NAME_LEN);
2241 sm->pmk_r1_name_valid = 1;
8fed47e0
JM		 2242 }
2243#endif /* CONFIG_IEEE80211R_AP */
2244
c4fd6d8a
JM		 2245 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2246 sm->addr, sm->wpa_auth->addr,
80ddf5d9
JM		 2247 g_sta ? wpabuf_head(g_sta) : NULL,
2248 g_sta ? wpabuf_len(g_sta) : 0,
2249 g_ap ? wpabuf_head(g_ap) : NULL,
2250 g_ap ? wpabuf_len(g_ap) : 0,
c4fd6d8a
JM		 2251 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2252 sm->fils_key_auth_ap,
2253 &sm->fils_key_auth_len);
2254 os_memset(ick, 0, sizeof(ick));
78815f3d
JM		 2255
2256 /* Store nonces for (Re)Association Request/Response frame processing */
2257 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2258 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2259
c4fd6d8a
JM		 2260 return res;
2261}
2262
2263
3b5b7aa8 2264static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2265 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2266{
2267 struct ieee802_1x_hdr *hdr;
2268 struct wpa_eapol_key *key;
2269 u8 *pos;
2270 u16 key_data_len;
2271 u8 *tmp;
2272 const u8 *aad[1];
2273 size_t aad_len[1];
2274
75c8563e 2275 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2276 key = (struct wpa_eapol_key *) (hdr + 1);
2277 pos = (u8 *) (key + 1);
2278 key_data_len = WPA_GET_BE16(pos);
2279 if (key_data_len < AES_BLOCK_SIZE ||
2280 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2281 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2282 "No room for AES-SIV data in the frame");
2283 return -1;
2284 }
2285 pos += 2; /* Pointing at the Encrypted Key Data field */
2286
2287 tmp = os_malloc(key_data_len);
2288 if (!tmp)
2289 return -1;
2290
2291 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2292 * to Key Data (exclusive). */
75c8563e
JM		 2293 aad[0] = buf;
2294 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2295 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2296 1, aad, aad_len, tmp) < 0) {
2297 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2298 "Invalid AES-SIV data in the frame");
2299 bin_clear_free(tmp, key_data_len);
2300 return -1;
2301 }
2302
2303 /* AEAD decryption and validation completed successfully */
2304 key_data_len -= AES_BLOCK_SIZE;
2305 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2306 tmp, key_data_len);
2307
2308 /* Replace Key Data field with the decrypted version */
2309 os_memcpy(pos, tmp, key_data_len);
2310 pos -= 2; /* Key Data Length field */
2311 WPA_PUT_BE16(pos, key_data_len);
2312 bin_clear_free(tmp, key_data_len);
2313 if (_key_data_len)
2314 *_key_data_len = key_data_len;
2315 return 0;
2316}
78815f3d
JM		 2317
2318
087631b9
JM		 2319const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2320 const u8 *ies, size_t ies_len,
2321 const u8 *fils_session)
2322{
2323 const u8 *ie, *end;
2324 const u8 *session = NULL;
2325
2326 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2327 wpa_printf(MSG_DEBUG,
2328 "FILS: Not a FILS AKM - reject association");
2329 return NULL;
2330 }
2331
2332 /* Verify Session element */
2333 ie = ies;
2334 end = ((const u8 *) ie) + ies_len;
2335 while (ie + 1 < end) {
2336 if (ie + 2 + ie[1] > end)
2337 break;
2338 if (ie[0] == WLAN_EID_EXTENSION &&
2339 ie[1] >= 1 + FILS_SESSION_LEN &&
2340 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2341 session = ie;
2342 break;
2343 }
2344 ie += 2 + ie[1];
2345 }
2346
2347 if (!session) {
2348 wpa_printf(MSG_DEBUG,
2349 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2350 __func__);
2351 return NULL;
2352 }
2353
2354 if (!fils_session) {
2355 wpa_printf(MSG_DEBUG,
2356 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2357 __func__);
2358 return NULL;
2359 }
2360
2361 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2362 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2363 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2364 fils_session, FILS_SESSION_LEN);
2365 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2366 session + 3, FILS_SESSION_LEN);
2367 return NULL;
2368 }
2369 return session;
2370}
2371
2372
bd599353
JM		 2373int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2374 size_t ies_len)
2375{
2376 struct ieee802_11_elems elems;
2377
2378 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2379 wpa_printf(MSG_DEBUG,
2380 "FILS: Failed to parse decrypted elements");
2381 return -1;
2382 }
2383
8b5ddda5
JM		 2384 if (!elems.fils_session) {
2385 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2386 return -1;
2387 }
2388
bd599353
JM		 2389 if (!elems.fils_key_confirm) {
2390 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2391 return -1;
2392 }
2393
2394 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2395 wpa_printf(MSG_DEBUG,
2396 "FILS: Unexpected Key-Auth length %d (expected %d)",
2397 elems.fils_key_confirm_len,
2398 (int) sm->fils_key_auth_len);
2399 return -1;
2400 }
2401
2402 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2403 sm->fils_key_auth_len) != 0) {
2404 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2405 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2406 elems.fils_key_confirm, elems.fils_key_confirm_len);
2407 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2408 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2409 return -1;
2410 }
2411
2412 return 0;
2413}
2414
2415
78815f3d
JM		 2416int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2417 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2418 u8 *pos, size_t left)
2419{
2420 u16 fc, stype;
2421 const u8 *end, *ie_start, *ie, *session, *crypt;
78815f3d
JM		 2422 const u8 *aad[5];
2423 size_t aad_len[5];
2424
2425 if (!sm || !sm->PTK_valid) {
2426 wpa_printf(MSG_DEBUG,
2427 "FILS: No KEK to decrypt Assocication Request frame");
2428 return -1;
2429 }
2430
2431 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2432 wpa_printf(MSG_DEBUG,
2433 "FILS: Not a FILS AKM - reject association");
2434 return -1;
2435 }
2436
2437 end = ((const u8 *) mgmt) + frame_len;
2438 fc = le_to_host16(mgmt->frame_control);
2439 stype = WLAN_FC_GET_STYPE(fc);
2440 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2441 ie_start = mgmt->u.reassoc_req.variable;
2442 else
2443 ie_start = mgmt->u.assoc_req.variable;
2444 ie = ie_start;
2445
2446 /*
2447 * Find FILS Session element which is the last unencrypted element in
2448 * the frame.
2449 */
087631b9
JM		 2450 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2451 fils_session);
78815f3d 2452 if (!session) {
087631b9 2453 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
78815f3d
JM		 2454 return -1;
2455 }
087631b9 2456
78815f3d
JM		 2457 crypt = session + 2 + session[1];
2458
2459 if (end - crypt < AES_BLOCK_SIZE) {
2460 wpa_printf(MSG_DEBUG,
2461 "FILS: Too short frame to include AES-SIV data");
2462 return -1;
2463 }
2464
2465 /* AES-SIV AAD vectors */
2466
2467 /* The STA's MAC address */
2468 aad[0] = mgmt->sa;
2469 aad_len[0] = ETH_ALEN;
2470 /* The AP's BSSID */
2471 aad[1] = mgmt->da;
2472 aad_len[1] = ETH_ALEN;
2473 /* The STA's nonce */
2474 aad[2] = sm->SNonce;
2475 aad_len[2] = FILS_NONCE_LEN;
2476 /* The AP's nonce */
2477 aad[3] = sm->ANonce;
2478 aad_len[3] = FILS_NONCE_LEN;
2479 /*
2480 * The (Re)Association Request frame from the Capability Information
2481 * field to the FILS Session element (both inclusive).
2482 */
2483 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2484 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2485
2486 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2487 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2488 wpa_printf(MSG_DEBUG,
2489 "FILS: Invalid AES-SIV data in the frame");
2490 return -1;
2491 }
2492 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2493 pos, left - AES_BLOCK_SIZE);
2494
bd599353
JM		 2495 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2496 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
78815f3d
JM		 2497 return -1;
2498 }
2499
2500 return left - AES_BLOCK_SIZE;
2501}
2502
e73ffa09
JM		 2503
2504int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2505 size_t current_len, size_t max_len,
2506 const struct wpabuf *hlp)
e73ffa09
JM		 2507{
2508 u8 *end = buf + max_len;
2509 u8 *pos = buf + current_len;
2510 struct ieee80211_mgmt *mgmt;
2511 struct wpabuf *plain;
e73ffa09
JM		 2512 const u8 *aad[5];
2513 size_t aad_len[5];
2514
2515 if (!sm || !sm->PTK_valid)
2516 return -1;
2517
2518 wpa_hexdump(MSG_DEBUG,
2519 "FILS: Association Response frame before FILS processing",
2520 buf, current_len);
2521
2522 mgmt = (struct ieee80211_mgmt *) buf;
2523
2524 /* AES-SIV AAD vectors */
2525
2526 /* The AP's BSSID */
2527 aad[0] = mgmt->sa;
2528 aad_len[0] = ETH_ALEN;
2529 /* The STA's MAC address */
2530 aad[1] = mgmt->da;
2531 aad_len[1] = ETH_ALEN;
2532 /* The AP's nonce */
2533 aad[2] = sm->ANonce;
2534 aad_len[2] = FILS_NONCE_LEN;
2535 /* The STA's nonce */
2536 aad[3] = sm->SNonce;
2537 aad_len[3] = FILS_NONCE_LEN;
2538 /*
2539 * The (Re)Association Response frame from the Capability Information
2540 * field (the same offset in both Association and Reassociation
2541 * Response frames) to the FILS Session element (both inclusive).
2542 */
2543 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2544 aad_len[4] = pos - aad[4];
2545
2546 /* The following elements will be encrypted with AES-SIV */
9392859d
JM		 2547 plain = fils_prepare_plainbuf(sm, hlp);
2548 if (!plain) {
2549 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2550 return -1;
2551 }
2552
2553 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2554 wpa_printf(MSG_DEBUG,
2555 "FILS: Not enough room for FILS elements");
2556 wpabuf_free(plain);
2557 return -1;
2558 }
2559
2560 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2561 plain);
2562
2563 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2564 wpabuf_head(plain), wpabuf_len(plain),
2565 5, aad, aad_len, pos) < 0) {
2566 wpabuf_free(plain);
2567 return -1;
2568 }
2569
2570 wpa_hexdump(MSG_DEBUG,
2571 "FILS: Encrypted Association Response elements",
2572 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2573 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2574 wpabuf_free(plain);
2575
2576 sm->fils_completed = 1;
2577
2578 return current_len;
2579}
2580
2581
2582static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2583 const struct wpabuf *hlp)
2584{
2585 struct wpabuf *plain;
2586 u8 *len, *tmp, *tmp2;
2587 u8 hdr[2];
2588 u8 *gtk, dummy_gtk[32];
2589 size_t gtk_len;
2590 struct wpa_group *gsm;
e73ffa09
JM		 2591
2592 plain = wpabuf_alloc(1000);
2593 if (!plain)
9392859d 2594 return NULL;
e73ffa09
JM		 2595
2596 /* TODO: FILS Public Key */
2597
2598 /* FILS Key Confirmation */
2599 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2600 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2601 /* Element ID Extension */
2602 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2603 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2604
91d91abf
JM		 2605 /* FILS HLP Container */
2606 if (hlp)
2607 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2608
2609 /* TODO: FILS IP Address Assignment */
2610
2611 /* Key Delivery */
2612 gsm = sm->group;
2613 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2614 len = wpabuf_put(plain, 1);
2615 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2616 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2617 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2618 /* GTK KDE */
2619 gtk = gsm->GTK[gsm->GN - 1];
2620 gtk_len = gsm->GTK_len;
8d660a4b
JM		 2621 if (sm->wpa_auth->conf.disable_gtk ||
2622 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
e73ffa09
JM		 2623 /*
2624 * Provide unique random GTK to each STA to prevent use
2625 * of GTK in the BSS.
2626 */
2627 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2628 wpabuf_free(plain);
9392859d 2629 return NULL;
e73ffa09
JM		 2630 }
2631 gtk = dummy_gtk;
2632 }
2633 hdr[0] = gsm->GN & 0x03;
2634 hdr[1] = 0;
2635 tmp = wpabuf_put(plain, 0);
2636 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2637 gtk, gtk_len);
2638 wpabuf_put(plain, tmp2 - tmp);
2639
2640 /* IGTK KDE */
2641 tmp = wpabuf_put(plain, 0);
2642 tmp2 = ieee80211w_kde_add(sm, tmp);
2643 wpabuf_put(plain, tmp2 - tmp);
2644
2645 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
99621dc1
MV		 2646
2647#ifdef CONFIG_OCV
2648 if (wpa_auth_uses_ocv(sm)) {
2649 struct wpa_channel_info ci;
2650 u8 *pos;
2651
2652 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2653 wpa_printf(MSG_WARNING,
2654 "FILS: Failed to get channel info for OCI element");
2655 wpabuf_free(plain);
2656 return NULL;
2657 }
2658
2659 pos = wpabuf_put(plain, OCV_OCI_EXTENDED_LEN);
2660 if (ocv_insert_extended_oci(&ci, pos) < 0) {
2661 wpabuf_free(plain);
2662 return NULL;
2663 }
2664 }
2665#endif /* CONFIG_OCV */
2666
9392859d 2667 return plain;
e73ffa09
JM		 2668}
2669
da24c5aa
JM		 2670
2671int fils_set_tk(struct wpa_state_machine *sm)
2672{
2673 enum wpa_alg alg;
2674 int klen;
2675
2f1357fb
JM		 2676 if (!sm || !sm->PTK_valid) {
2677 wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK");
2678 return -1;
2679 }
2680 if (sm->tk_already_set) {
2681 wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver");
da24c5aa 2682 return -1;
2f1357fb 2683 }
da24c5aa
JM		 2684
2685 alg = wpa_cipher_to_alg(sm->pairwise);
2686 klen = wpa_cipher_key_len(sm->pairwise);
2687
2688 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2689 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2690 sm->PTK.tk, klen)) {
2691 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2692 return -1;
2693 }
2f1357fb 2694 sm->tk_already_set = TRUE;
da24c5aa
JM		 2695
2696 return 0;
2697}
2698
fa61bff6
JM		 2699
2700u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
8b5ddda5 2701 const u8 *fils_session, struct wpabuf *hlp)
fa61bff6
JM		 2702{
2703 struct wpabuf *plain;
2704 u8 *pos = buf;
2705
2706 /* FILS Session */
2707 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2708 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2709 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2710 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2711 pos += FILS_SESSION_LEN;
2712
8b5ddda5 2713 plain = fils_prepare_plainbuf(sm, hlp);
fa61bff6
JM		 2714 if (!plain) {
2715 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2716 return NULL;
2717 }
2718
2719 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2720 pos += wpabuf_len(plain);
2721
2722 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2723 (unsigned int) wpabuf_len(plain));
2724 wpabuf_free(plain);
2725 sm->fils_completed = 1;
2726 return pos;
2727}
2728
3b5b7aa8
JM		 2729#endif /* CONFIG_FILS */
2730
2731
1034f67b
MV		 2732#ifdef CONFIG_OCV
2733int get_sta_tx_parameters(struct wpa_state_machine *sm, int ap_max_chanwidth,
2734 int ap_seg1_idx, int *bandwidth, int *seg1_idx)
2735{
2736 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2737
2738 if (!wpa_auth->cb->get_sta_tx_params)
2739 return -1;
2740 return wpa_auth->cb->get_sta_tx_params(wpa_auth->cb_ctx, sm->addr,
2741 ap_max_chanwidth, ap_seg1_idx,
2742 bandwidth, seg1_idx);
2743}
2744#endif /* CONFIG_OCV */
2745
2746
6fc6879b
JM		 2747SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2748{
3b5b7aa8 2749 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2750 struct wpa_ptk PTK;
2c502460 2751 int ok = 0, psk_found = 0;
6fc6879b 2752 const u8 *pmk = NULL;
7a12edd1 2753 size_t pmk_len;
3b5b7aa8
JM		 2754 int ft;
2755 const u8 *eapol_key_ie, *key_data, *mic;
2756 u16 key_data_length;
2757 size_t mic_len, eapol_key_ie_len;
2758 struct ieee802_1x_hdr *hdr;
2759 struct wpa_eapol_key *key;
2760 struct wpa_eapol_ie_parse kde;
bb05d036 2761 int vlan_id = 0;
6fc6879b
JM		 2762
2763 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2764 sm->EAPOLKeyReceived = FALSE;
68921e24 2765 sm->update_snonce = FALSE;
b729fd8d 2766 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2767
567da5bb 2768 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3b5b7aa8 2769
6fc6879b
JM		 2770 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2771 * WPA-PSK: iterate through possible PSKs and select the one matching
2772 * the packet */
2773 for (;;) {
e61fea6b
JM		 2774 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2775 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
759fd76b 2776 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
dbfa691d
JM		 2777 sm->p2p_dev_addr, pmk, &pmk_len,
2778 &vlan_id);
6fc6879b
JM		 2779 if (pmk == NULL)
2780 break;
2c502460 2781 psk_found = 1;
f9854c18
MK		 2782#ifdef CONFIG_IEEE80211R_AP
2783 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2784 os_memcpy(sm->xxkey, pmk, pmk_len);
2785 sm->xxkey_len = pmk_len;
2786 }
2787#endif /* CONFIG_IEEE80211R_AP */
207976f0 2788 } else {
6fc6879b 2789 pmk = sm->PMK;
207976f0
JM		 2790 pmk_len = sm->pmk_len;
2791 }
6fc6879b 2792
364c064a
JM		 2793 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2794 break;
6fc6879b 2795
3b5b7aa8 2796 if (mic_len &&
567da5bb 2797 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
929a2ea5 2798 sm->last_rx_eapol_key,
6fc6879b 2799 sm->last_rx_eapol_key_len) == 0) {
08dc8efd
JM		 2800 if (sm->PMK != pmk) {
2801 os_memcpy(sm->PMK, pmk, pmk_len);
2802 sm->pmk_len = pmk_len;
2803 }
6fc6879b
JM		 2804 ok = 1;
2805 break;
2806 }
2807
3b5b7aa8 2808#ifdef CONFIG_FILS
75c8563e
JM		 2809 if (!mic_len &&
2810 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2811 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2812 ok = 1;
2813 break;
2814 }
2815#endif /* CONFIG_FILS */
2816
f5e0a332
JM		 2817 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
2818 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
6fc6879b
JM		 2819 break;
2820 }
2821
2822 if (!ok) {
2823 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2824 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2825 if (psk_found)
2826 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2827 return;
2828 }
2829
3b5b7aa8
JM		 2830 /*
2831 * Note: last_rx_eapol_key length fields have already been validated in
2832 * wpa_receive().
2833 */
2834 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2835 key = (struct wpa_eapol_key *) (hdr + 1);
2836 mic = (u8 *) (key + 1);
2837 key_data = mic + mic_len + 2;
2838 key_data_length = WPA_GET_BE16(mic + mic_len);
2839 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2840 sizeof(*key) - mic_len - 2)
2841 return;
2842
2843 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2844 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2845 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2846 return;
2847 }
2848 if (kde.rsn_ie) {
2849 eapol_key_ie = kde.rsn_ie;
2850 eapol_key_ie_len = kde.rsn_ie_len;
2851 } else if (kde.osen) {
2852 eapol_key_ie = kde.osen;
2853 eapol_key_ie_len = kde.osen_len;
2854 } else {
2855 eapol_key_ie = kde.wpa_ie;
2856 eapol_key_ie_len = kde.wpa_ie_len;
2857 }
2858 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2859 if (sm->wpa_ie == NULL ||
2860 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2861 eapol_key_ie, eapol_key_ie_len)) {
2862 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2863 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2864 if (sm->wpa_ie) {
2865 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2866 sm->wpa_ie, sm->wpa_ie_len);
2867 }
2868 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2869 eapol_key_ie, eapol_key_ie_len);
2870 /* MLME-DEAUTHENTICATE.request */
567da5bb
JM		 2871 wpa_sta_disconnect(wpa_auth, sm->addr,
2872 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2873 return;
2874 }
aed61c4e
MV		 2875#ifdef CONFIG_OCV
2876 if (wpa_auth_uses_ocv(sm)) {
2877 struct wpa_channel_info ci;
2878 int tx_chanwidth;
2879 int tx_seg1_idx;
2880
2881 if (wpa_channel_info(wpa_auth, &ci) != 0) {
2882 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2883 "Failed to get channel info to validate received OCI in EAPOL-Key 2/4");
2884 return;
2885 }
2886
2887 if (get_sta_tx_parameters(sm,
2888 channel_width_to_int(ci.chanwidth),
2889 ci.seg1_idx, &tx_chanwidth,
2890 &tx_seg1_idx) < 0)
2891 return;
2892
2893 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
2894 tx_chanwidth, tx_seg1_idx) != 0) {
2895 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2896 ocv_errorstr);
2897 return;
2898 }
2899 }
2900#endif /* CONFIG_OCV */
4ec1fd8e 2901#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8 2902 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
567da5bb
JM		 2903 wpa_sta_disconnect(wpa_auth, sm->addr,
2904 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2905 return;
2906 }
4ec1fd8e 2907#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2908#ifdef CONFIG_P2P
2909 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2910 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2911 int idx;
2912 wpa_printf(MSG_DEBUG,
2913 "P2P: IP address requested in EAPOL-Key exchange");
2914 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2915 if (idx >= 0) {
2916 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2917 bitfield_set(wpa_auth->ip_pool, idx);
2918 WPA_PUT_BE32(sm->ip_addr, start + idx);
2919 wpa_printf(MSG_DEBUG,
2920 "P2P: Assigned IP address %u.%u.%u.%u to "
2921 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2922 sm->ip_addr[2], sm->ip_addr[3],
2923 MAC2STR(sm->addr));
2924 }
2925 }
2926#endif /* CONFIG_P2P */
2927
4ec1fd8e 2928#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2929 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2930 /*
2931 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2932 * with the value we derived.
2933 */
870834a1
JM		 2934 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2935 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2936 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2937 "PMKR1Name mismatch in FT 4-way "
2938 "handshake");
2939 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2940 "Supplicant",
2941 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2942 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2943 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2944 return;
2945 }
2946 }
4ec1fd8e 2947#endif /* CONFIG_IEEE80211R_AP */
26e23750 2948
dbfa691d
JM		 2949 if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2950 wpa_auth_update_vlan(wpa_auth, sm->addr, vlan_id) < 0) {
2951 wpa_sta_disconnect(wpa_auth, sm->addr,
2952 WLAN_REASON_PREV_AUTH_NOT_VALID);
2953 return;
2954 }
2955
e4bf4db9 2956 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2957 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2958
56586197 2959 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2960 /* PSK may have changed from the previous choice, so update
2961 * state machine data based on whatever PSK was selected here.
2962 */
2963 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2964 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2965 }
2966
2967 sm->MICVerified = TRUE;
2968
2969 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2970 sm->PTK_valid = TRUE;
2971}
2972
2973
2974SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2975{
2976 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2977 sm->TimeoutCtr = 0;
2978}
2979
2980
2981#ifdef CONFIG_IEEE80211W
2982
2983static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2984{
2985 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2986 size_t len;
2987 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2988 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2989 }
2990
2991 return 0;
2992}
2993
2994
2995static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2996{
2997 struct wpa_igtk_kde igtk;
2998 struct wpa_group *gsm = sm->group;
03610ad2 2999 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 3000 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 3001
3002 if (!sm->mgmt_frame_prot)
3003 return pos;
3004
3005 igtk.keyid[0] = gsm->GN_igtk;
3006 igtk.keyid[1] = 0;
7b1080da 3007 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 3008 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 3009 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 3010 else
3011 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 3012 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
8d660a4b
JM		 3013 if (sm->wpa_auth->conf.disable_gtk ||
3014 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3015 /*
3016 * Provide unique random IGTK to each STA to prevent use of
3017 * IGTK in the BSS.
3018 */
8dd9f9cd 3019 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 3020 return pos;
3021 }
6fc6879b 3022 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 3023 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
3024 NULL, 0);
6fc6879b
JM		 3025
3026 return pos;
3027}
3028
3029#else /* CONFIG_IEEE80211W */
3030
3031static int ieee80211w_kde_len(struct wpa_state_machine *sm)
3032{
3033 return 0;
3034}
3035
3036
3037static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
3038{
3039 return pos;
3040}
3041
3042#endif /* CONFIG_IEEE80211W */
3043
3044
17c2559c
MV		 3045static int ocv_oci_len(struct wpa_state_machine *sm)
3046{
3047#ifdef CONFIG_OCV
3048 if (wpa_auth_uses_ocv(sm))
3049 return OCV_OCI_KDE_LEN;
3050#endif /* CONFIG_OCV */
3051 return 0;
3052}
3053
3054static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos)
3055{
3056#ifdef CONFIG_OCV
3057 struct wpa_channel_info ci;
3058
3059 if (!wpa_auth_uses_ocv(sm))
3060 return 0;
3061
3062 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3063 wpa_printf(MSG_WARNING,
3064 "Failed to get channel info for OCI element");
3065 return -1;
3066 }
3067
3068 return ocv_insert_oci_kde(&ci, argpos);
3069#else /* CONFIG_OCV */
3070 return 0;
3071#endif /* CONFIG_OCV */
3072}
3073
3074
6fc6879b
JM		 3075SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
3076{
83421850 3077 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 3078 size_t gtk_len, kde_len;
3079 struct wpa_group *gsm = sm->group;
3080 u8 *wpa_ie;
3081 int wpa_ie_len, secure, keyidx, encr = 0;
3082
3083 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
3084 sm->TimeoutEvt = FALSE;
bae61562
JM		 3085
3086 sm->TimeoutCtr++;
6f234c1e
JM		 3087 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3088 sm->TimeoutCtr > 1) {
3089 /* Do not allow retransmission of EAPOL-Key msg 3/4 */
3090 return;
3091 }
41f140d3 3092 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 3093 /* No point in sending the EAPOL-Key - we will disconnect
3094 * immediately following this. */
3095 return;
3096 }
3097
86dfabb8
JM		 3098 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
3099 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 3100 */
3101 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3102 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 3103 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 3104 wpa_ie = sm->wpa_auth->wpa_ie;
3105 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
3106 if (sm->wpa == WPA_VERSION_WPA &&
3107 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
3108 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 3109 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 3110 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 3111 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
3112 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 3113 wpa_ie_len = wpa_ie[1] + 2;
3114 }
3115 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3116 "sending 3/4 msg of 4-Way Handshake");
3117 if (sm->wpa == WPA_VERSION_WPA2) {
3118 /* WPA2 send GTK in the 4-way handshake */
3119 secure = 1;
3120 gtk = gsm->GTK[gsm->GN - 1];
3121 gtk_len = gsm->GTK_len;
8d660a4b
JM		 3122 if (sm->wpa_auth->conf.disable_gtk ||
3123 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3124 /*
3125 * Provide unique random GTK to each STA to prevent use
3126 * of GTK in the BSS.
3127 */
3128 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
3129 return;
3130 gtk = dummy_gtk;
3131 }
6fc6879b
JM		 3132 keyidx = gsm->GN;
3133 _rsc = rsc;
3134 encr = 1;
3135 } else {
3136 /* WPA does not include GTK in msg 3/4 */
3137 secure = 0;
3138 gtk = NULL;
3139 gtk_len = 0;
3140 keyidx = 0;
3141 _rsc = NULL;
0d442aff
JM		 3142 if (sm->rx_eapol_key_secure) {
3143 /*
3144 * It looks like Windows 7 supplicant tries to use
3145 * Secure bit in msg 2/4 after having reported Michael
3146 * MIC failure and it then rejects the 4-way handshake
3147 * if msg 3/4 does not set Secure bit. Work around this
3148 * by setting the Secure bit here even in the case of
3149 * WPA if the supplicant used it first.
3150 */
3151 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 3152 "STA used Secure bit in WPA msg 2/4 - "
3153 "set Secure for 3/4 as workaround");
0d442aff
JM		 3154 secure = 1;
3155 }
6fc6879b
JM		 3156 }
3157
17c2559c 3158 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
6fc6879b
JM		 3159 if (gtk)
3160 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 3161#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 3162 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3163 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
3164 kde_len += 300; /* FTIE + 2 * TIE */
3165 }
4ec1fd8e 3166#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3167#ifdef CONFIG_P2P
3168 if (WPA_GET_BE32(sm->ip_addr) > 0)
3169 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
3170#endif /* CONFIG_P2P */
6fc6879b
JM		 3171 kde = os_malloc(kde_len);
3172 if (kde == NULL)
3173 return;
3174
3175 pos = kde;
3176 os_memcpy(pos, wpa_ie, wpa_ie_len);
3177 pos += wpa_ie_len;
4ec1fd8e 3178#ifdef CONFIG_IEEE80211R_AP
26e23750 3179 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 3180 int res;
3181 size_t elen;
3182
3183 elen = pos - kde;
3184 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 3185 if (res < 0) {
3186 wpa_printf(MSG_ERROR, "FT: Failed to insert "
3187 "PMKR1Name into RSN IE in EAPOL-Key data");
3188 os_free(kde);
3189 return;
3190 }
59e78c24
JM		 3191 pos -= wpa_ie_len;
3192 pos += elen;
26e23750 3193 }
4ec1fd8e 3194#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3195 if (gtk) {
3196 u8 hdr[2];
3197 hdr[0] = keyidx & 0x03;
3198 hdr[1] = 0;
3199 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3200 gtk, gtk_len);
3201 }
3202 pos = ieee80211w_kde_add(sm, pos);
17c2559c
MV		 3203 if (ocv_oci_add(sm, &pos) < 0) {
3204 os_free(kde);
3205 return;
3206 }
6fc6879b 3207
4ec1fd8e 3208#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 3209 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3210 int res;
3211 struct wpa_auth_config *conf;
3212
3213 conf = &sm->wpa_auth->conf;
9257610a
JM		 3214 if (sm->assoc_resp_ftie &&
3215 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
3216 os_memcpy(pos, sm->assoc_resp_ftie,
3217 2 + sm->assoc_resp_ftie[1]);
3218 res = 2 + sm->assoc_resp_ftie[1];
3219 } else {
a7968ea5
JM		 3220 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3221
3222 res = wpa_write_ftie(conf, use_sha384,
3223 conf->r0_key_holder,
9257610a
JM		 3224 conf->r0_key_holder_len,
3225 NULL, NULL, pos,
3226 kde + kde_len - pos,
3227 NULL, 0);
3228 }
86dfabb8
JM		 3229 if (res < 0) {
3230 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3231 "into EAPOL-Key Key Data");
3232 os_free(kde);
3233 return;
3234 }
3235 pos += res;
3236
3237 /* TIE[ReassociationDeadline] (TU) */
3238 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3239 *pos++ = 5;
3240 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3241 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3242 pos += 4;
3243
3244 /* TIE[KeyLifetime] (seconds) */
3245 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3246 *pos++ = 5;
3247 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 3248 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
86dfabb8
JM		 3249 pos += 4;
3250 }
4ec1fd8e 3251#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3252#ifdef CONFIG_P2P
3253 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3254 u8 addr[3 * 4];
3255 os_memcpy(addr, sm->ip_addr, 4);
3256 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3257 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3258 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3259 addr, sizeof(addr), NULL, 0);
3260 }
3261#endif /* CONFIG_P2P */
86dfabb8 3262
6fc6879b 3263 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3264 (secure ? WPA_KEY_INFO_SECURE : 0) |
567da5bb
JM		 3265 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3266 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3267 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3268 WPA_KEY_INFO_KEY_TYPE,
3269 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3270 os_free(kde);
6fc6879b
JM		 3271}
3272
3273
3274SM_STATE(WPA_PTK, PTKINITDONE)
3275{
3276 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3277 sm->EAPOLKeyReceived = FALSE;
3278 if (sm->Pair) {
c3550295
JM		 3279 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3280 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 3281 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 3282 sm->PTK.tk, klen)) {
567da5bb
JM		 3283 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3284 WLAN_REASON_PREV_AUTH_NOT_VALID);
6fc6879b
JM		 3285 return;
3286 }
3287 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3288 sm->pairwise_set = TRUE;
3289
581a8cde
JM		 3290 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
3291 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3292 eloop_register_timeout(sm->wpa_auth->conf.
3293 wpa_ptk_rekey, 0, wpa_rekey_ptk,
3294 sm->wpa_auth, sm);
3295 }
3296
a1ea1b45 3297 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 3298 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 3299 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 3300 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3301 WPA_EAPOL_authorized, 1);
3302 }
3303 }
3304
3305 if (0 /* IBSS == TRUE */) {
3306 sm->keycount++;
3307 if (sm->keycount == 2) {
3308 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3309 WPA_EAPOL_portValid, 1);
3310 }
3311 } else {
3312 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3313 1);
3314 }
3315 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3316 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3317 if (sm->wpa == WPA_VERSION_WPA)
3318 sm->PInitAKeys = TRUE;
3319 else
3320 sm->has_GTK = TRUE;
3321 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3322 "pairwise key handshake completed (%s)",
3323 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3324
4ec1fd8e 3325#ifdef CONFIG_IEEE80211R_AP
6fc6879b 3326 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 3327#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3328}
3329
3330
3331SM_STEP(WPA_PTK)
3332{
3333 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3334
3335 if (sm->Init)
3336 SM_ENTER(WPA_PTK, INITIALIZE);
3337 else if (sm->Disconnect
1aae01fc
BG		 3338 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3339 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3340 "WPA_PTK: sm->Disconnect");
6fc6879b 3341 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 3342 }
6fc6879b
JM		 3343 else if (sm->DeauthenticationRequest)
3344 SM_ENTER(WPA_PTK, DISCONNECTED);
3345 else if (sm->AuthenticationRequest)
3346 SM_ENTER(WPA_PTK, AUTHENTICATION);
3347 else if (sm->ReAuthenticationRequest)
3348 SM_ENTER(WPA_PTK, AUTHENTICATION2);
0adc9b28
JM		 3349 else if (sm->PTKRequest) {
3350 if (wpa_auth_sm_ptk_update(sm) < 0)
3351 SM_ENTER(WPA_PTK, DISCONNECTED);
3352 else
3353 SM_ENTER(WPA_PTK, PTKSTART);
3354 } else switch (sm->wpa_ptk_state) {
6fc6879b
JM		 3355 case WPA_PTK_INITIALIZE:
3356 break;
3357 case WPA_PTK_DISCONNECT:
3358 SM_ENTER(WPA_PTK, DISCONNECTED);
3359 break;
3360 case WPA_PTK_DISCONNECTED:
3361 SM_ENTER(WPA_PTK, INITIALIZE);
3362 break;
3363 case WPA_PTK_AUTHENTICATION:
3364 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3365 break;
3366 case WPA_PTK_AUTHENTICATION2:
56586197 3367 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 3368 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3369 WPA_EAPOL_keyRun) > 0)
3370 SM_ENTER(WPA_PTK, INITPMK);
a1ea1b45
JM		 3371 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3372 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
6fc6879b
JM		 3373 /* FIX: && 802.1X::keyRun */)
3374 SM_ENTER(WPA_PTK, INITPSK);
567da5bb
JM		 3375 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3376 SM_ENTER(WPA_PTK, INITPMK);
6fc6879b
JM		 3377 break;
3378 case WPA_PTK_INITPMK:
3379 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
567da5bb 3380 WPA_EAPOL_keyAvailable) > 0) {
6fc6879b 3381 SM_ENTER(WPA_PTK, PTKSTART);
567da5bb
JM		 3382#ifdef CONFIG_DPP
3383 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3384 SM_ENTER(WPA_PTK, PTKSTART);
3385#endif /* CONFIG_DPP */
3386 } else {
6fc6879b 3387 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 3388 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3389 "INITPMK - keyAvailable = false");
6fc6879b
JM		 3390 SM_ENTER(WPA_PTK, DISCONNECT);
3391 }
3392 break;
3393 case WPA_PTK_INITPSK:
759fd76b 3394 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
dbfa691d 3395 NULL, NULL, NULL)) {
6fc6879b 3396 SM_ENTER(WPA_PTK, PTKSTART);
e61fea6b
JM		 3397#ifdef CONFIG_SAE
3398 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3399 SM_ENTER(WPA_PTK, PTKSTART);
3400#endif /* CONFIG_SAE */
3401 } else {
6fc6879b
JM		 3402 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3403 "no PSK configured for the STA");
3404 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3405 SM_ENTER(WPA_PTK, DISCONNECT);
3406 }
3407 break;
3408 case WPA_PTK_PTKSTART:
3409 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3410 sm->EAPOLKeyPairwise)
3411 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3412 else if (sm->TimeoutCtr >
41f140d3 3413 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3414 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3415 wpa_auth_vlogger(
3416 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3417 "PTKSTART: Retry limit %u reached",
3418 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3419 SM_ENTER(WPA_PTK, DISCONNECT);
3420 } else if (sm->TimeoutEvt)
3421 SM_ENTER(WPA_PTK, PTKSTART);
3422 break;
3423 case WPA_PTK_PTKCALCNEGOTIATING:
3424 if (sm->MICVerified)
3425 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3426 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3427 sm->EAPOLKeyPairwise)
3428 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3429 else if (sm->TimeoutEvt)
3430 SM_ENTER(WPA_PTK, PTKSTART);
3431 break;
3432 case WPA_PTK_PTKCALCNEGOTIATING2:
3433 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3434 break;
3435 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3436 if (sm->update_snonce)
3437 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3438 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3439 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3440 SM_ENTER(WPA_PTK, PTKINITDONE);
3441 else if (sm->TimeoutCtr >
6f234c1e
JM		 3442 sm->wpa_auth->conf.wpa_pairwise_update_count ||
3443 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3444 sm->TimeoutCtr > 1)) {
6fc6879b 3445 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3446 wpa_auth_vlogger(
3447 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3448 "PTKINITNEGOTIATING: Retry limit %u reached",
3449 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3450 SM_ENTER(WPA_PTK, DISCONNECT);
3451 } else if (sm->TimeoutEvt)
3452 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3453 break;
3454 case WPA_PTK_PTKINITDONE:
3455 break;
3456 }
3457}
3458
3459
3460SM_STATE(WPA_PTK_GROUP, IDLE)
3461{
3462 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3463 if (sm->Init) {
3464 /* Init flag is not cleared here, so avoid busy
3465 * loop by claiming nothing changed. */
3466 sm->changed = FALSE;
3467 }
3468 sm->GTimeoutCtr = 0;
3469}
3470
3471
3472SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3473{
3474 u8 rsc[WPA_KEY_RSC_LEN];
3475 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3476 const u8 *kde;
3477 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3478 size_t kde_len;
83421850 3479 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3480
3481 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3482
3483 sm->GTimeoutCtr++;
6f234c1e
JM		 3484 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3485 sm->GTimeoutCtr > 1) {
3486 /* Do not allow retransmission of EAPOL-Key group msg 1/2 */
3487 return;
3488 }
41f140d3 3489 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3490 /* No point in sending the EAPOL-Key - we will disconnect
3491 * immediately following this. */
3492 return;
3493 }
3494
6fc6879b
JM		 3495 if (sm->wpa == WPA_VERSION_WPA)
3496 sm->PInitAKeys = FALSE;
3497 sm->TimeoutEvt = FALSE;
3498 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3499 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3500 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3501 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3502 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3503 "sending 1/2 msg of Group Key Handshake");
3504
83421850 3505 gtk = gsm->GTK[gsm->GN - 1];
8d660a4b
JM		 3506 if (sm->wpa_auth->conf.disable_gtk ||
3507 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3508 /*
3509 * Provide unique random GTK to each STA to prevent use
3510 * of GTK in the BSS.
3511 */
3512 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3513 return;
3514 gtk = dummy_gtk;
3515 }
6fc6879b
JM		 3516 if (sm->wpa == WPA_VERSION_WPA2) {
3517 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
17c2559c 3518 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
e41e4f9e
JM		 3519 kde_buf = os_malloc(kde_len);
3520 if (kde_buf == NULL)
6fc6879b
JM		 3521 return;
3522
e41e4f9e 3523 kde = pos = kde_buf;
6fc6879b
JM		 3524 hdr[0] = gsm->GN & 0x03;
3525 hdr[1] = 0;
3526 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3527 gtk, gsm->GTK_len);
6fc6879b 3528 pos = ieee80211w_kde_add(sm, pos);
17c2559c
MV		 3529 if (ocv_oci_add(sm, &pos) < 0) {
3530 os_free(kde_buf);
3531 return;
3532 }
e41e4f9e 3533 kde_len = pos - kde;
6fc6879b 3534 } else {
83421850 3535 kde = gtk;
e41e4f9e 3536 kde_len = gsm->GTK_len;
6fc6879b
JM		 3537 }
3538
3539 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3540 WPA_KEY_INFO_SECURE |
567da5bb
JM		 3541 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3542 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3543 WPA_KEY_INFO_ACK |
3544 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3545 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3546
3547 os_free(kde_buf);
6fc6879b
JM		 3548}
3549
3550
3551SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3552{
aed61c4e
MV		 3553#ifdef CONFIG_OCV
3554 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3555 const u8 *key_data, *mic;
3556 struct ieee802_1x_hdr *hdr;
3557 struct wpa_eapol_key *key;
3558 struct wpa_eapol_ie_parse kde;
3559 size_t mic_len;
3560 u16 key_data_length;
3561#endif /* CONFIG_OCV */
3562
6fc6879b
JM		 3563 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3564 sm->EAPOLKeyReceived = FALSE;
aed61c4e
MV		 3565
3566#ifdef CONFIG_OCV
3567 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3568
3569 /*
3570 * Note: last_rx_eapol_key length fields have already been validated in
3571 * wpa_receive().
3572 */
3573 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
3574 key = (struct wpa_eapol_key *) (hdr + 1);
3575 mic = (u8 *) (key + 1);
3576 key_data = mic + mic_len + 2;
3577 key_data_length = WPA_GET_BE16(mic + mic_len);
3578 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
3579 sizeof(*key) - mic_len - 2)
3580 return;
3581
3582 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
3583 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
3584 "received EAPOL-Key group msg 2/2 with invalid Key Data contents");
3585 return;
3586 }
3587
3588 if (wpa_auth_uses_ocv(sm)) {
3589 struct wpa_channel_info ci;
3590 int tx_chanwidth;
3591 int tx_seg1_idx;
3592
3593 if (wpa_channel_info(wpa_auth, &ci) != 0) {
3594 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3595 "Failed to get channel info to validate received OCI in EAPOL-Key group 1/2");
3596 return;
3597 }
3598
3599 if (get_sta_tx_parameters(sm,
3600 channel_width_to_int(ci.chanwidth),
3601 ci.seg1_idx, &tx_chanwidth,
3602 &tx_seg1_idx) < 0)
3603 return;
3604
3605 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
3606 tx_chanwidth, tx_seg1_idx) != 0) {
3607 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3608 ocv_errorstr);
3609 return;
3610 }
3611 }
3612#endif /* CONFIG_OCV */
3613
6fc6879b
JM		 3614 if (sm->GUpdateStationKeys)
3615 sm->group->GKeyDoneStations--;
3616 sm->GUpdateStationKeys = FALSE;
3617 sm->GTimeoutCtr = 0;
3618 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3619 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3620 "group key handshake completed (%s)",
3621 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3622 sm->has_GTK = TRUE;
3623}
3624
3625
3626SM_STATE(WPA_PTK_GROUP, KEYERROR)
3627{
3628 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3629 if (sm->GUpdateStationKeys)
3630 sm->group->GKeyDoneStations--;
3631 sm->GUpdateStationKeys = FALSE;
3632 sm->Disconnect = TRUE;
4bb9b674
GK		 3633 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3634 "group key handshake failed (%s) after %u tries",
3635 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3636 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3637}
3638
3639
3640SM_STEP(WPA_PTK_GROUP)
3641{
9663596f 3642 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3643 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3644 sm->PtkGroupInit = FALSE;
3645 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3646 case WPA_PTK_GROUP_IDLE:
3647 if (sm->GUpdateStationKeys ||
3648 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3649 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3650 break;
3651 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3652 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3653 !sm->EAPOLKeyPairwise && sm->MICVerified)
3654 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3655 else if (sm->GTimeoutCtr >
6f234c1e
JM		 3656 sm->wpa_auth->conf.wpa_group_update_count ||
3657 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3658 sm->GTimeoutCtr > 1))
6fc6879b
JM		 3659 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3660 else if (sm->TimeoutEvt)
3661 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3662 break;
3663 case WPA_PTK_GROUP_KEYERROR:
3664 SM_ENTER(WPA_PTK_GROUP, IDLE);
3665 break;
3666 case WPA_PTK_GROUP_REKEYESTABLISHED:
3667 SM_ENTER(WPA_PTK_GROUP, IDLE);
3668 break;
3669 }
3670}
3671
3672
3673static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3674 struct wpa_group *group)
3675{
3676 int ret = 0;
3677
6fc6879b
JM		 3678 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3679 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3680 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3681 wpa_auth->addr, group->GNonce,
3682 group->GTK[group->GN - 1], group->GTK_len) < 0)
3683 ret = -1;
5cb9d5c3
JM		 3684 wpa_hexdump_key(MSG_DEBUG, "GTK",
3685 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 3686
3687#ifdef CONFIG_IEEE80211W
70f8cc8e 3688 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3689 size_t len;
3690 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3691 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3692 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3693 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3694 wpa_auth->addr, group->GNonce,
8dd9f9cd 3695 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3696 ret = -1;
6fc6879b 3697 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3698 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 3699 }
3700#endif /* CONFIG_IEEE80211W */
3701
3702 return ret;
3703}
3704
3705
3706static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3707 struct wpa_group *group)
3708{
3709 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3710 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3711 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3712 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3713
3714 /* GTK[0..N] = 0 */
3715 os_memset(group->GTK, 0, sizeof(group->GTK));
3716 group->GN = 1;
3717 group->GM = 2;
3718#ifdef CONFIG_IEEE80211W
3719 group->GN_igtk = 4;
3720 group->GM_igtk = 5;
3721#endif /* CONFIG_IEEE80211W */
3722 /* GTK[GN] = CalcGTK() */
3723 wpa_gtk_update(wpa_auth, group);
3724}
3725
3726
3727static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3728{
473b6f22
MB		 3729 if (ctx != NULL && ctx != sm->group)
3730 return 0;
3731
6fc6879b
JM		 3732 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3733 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3734 "Not in PTKINITDONE; skip Group Key update");
3c183894 3735 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3736 return 0;
3737 }
9663596f
JM		 3738 if (sm->GUpdateStationKeys) {
3739 /*
3c183894
JM		 3740 * This should not really happen, so add a debug log entry.
3741 * Since we clear the GKeyDoneStations before the loop, the
3742 * station needs to be counted here anyway.
9663596f
JM		 3743 */
3744 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3745 "GUpdateStationKeys was already set when "
3746 "marking station for GTK rekeying");
9663596f 3747 }
3c183894 3748
ad3872a3 3749 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3750 if (sm->is_wnmsleep)
3751 return 0;
d32d94db 3752
3c183894
JM		 3753 sm->group->GKeyDoneStations++;
3754 sm->GUpdateStationKeys = TRUE;
3755
6fc6879b
JM		 3756 wpa_sm_step(sm);
3757 return 0;
3758}
3759
3760
b5bf84ba 3761#ifdef CONFIG_WNM_AP
ad3872a3 3762/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3763void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3764{
629edfef 3765 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3766 return;
3767
3768 wpa_group_update_sta(sm, NULL);
3769}
3770
3771
3772void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3773{
629edfef
JM		 3774 if (sm)
3775 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3776}
3777
3778
3779int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3780{
d32d94db 3781 struct wpa_group *gsm = sm->group;
835822d4 3782 u8 *start = pos;
d32d94db
XC		 3783
3784 /*
835822d4 3785 * GTK subelement:
d32d94db 3786 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3787 * Key[5..32]
d32d94db 3788 */
835822d4
JM		 3789 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3790 *pos++ = 11 + gsm->GTK_len;
d32d94db 3791 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3792 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3793 pos += 2;
3794 *pos++ = gsm->GTK_len;
3795 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3796 return 0;
835822d4
JM		 3797 pos += 8;
3798 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3799 pos += gsm->GTK_len;
d32d94db 3800
835822d4
JM		 3801 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3802 gsm->GN);
3803 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3804 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3805
835822d4 3806 return pos - start;
d32d94db
XC		 3807}
3808
3809
3810#ifdef CONFIG_IEEE80211W
3811int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3812{
d32d94db 3813 struct wpa_group *gsm = sm->group;
835822d4 3814 u8 *start = pos;
8dd9f9cd 3815 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3816
835822d4
JM		 3817 /*
3818 * IGTK subelement:
3819 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3820 */
3821 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3822 *pos++ = 2 + 6 + len;
835822d4
JM		 3823 WPA_PUT_LE16(pos, gsm->GN_igtk);
3824 pos += 2;
3825 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3826 return 0;
835822d4 3827 pos += 6;
d32d94db 3828
8dd9f9cd
JM		 3829 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3830 pos += len;
d32d94db 3831
835822d4
JM		 3832 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3833 gsm->GN_igtk);
3834 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3835 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3836
835822d4 3837 return pos - start;
d32d94db
XC		 3838}
3839#endif /* CONFIG_IEEE80211W */
b5bf84ba 3840#endif /* CONFIG_WNM_AP */
d32d94db
XC		 3841
3842
6fc6879b
JM		 3843static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3844 struct wpa_group *group)
3845{
3846 int tmp;
3847
3848 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3849 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3850 group->changed = TRUE;
3851 group->wpa_group_state = WPA_GROUP_SETKEYS;
3852 group->GTKReKey = FALSE;
3853 tmp = group->GM;
3854 group->GM = group->GN;
3855 group->GN = tmp;
3856#ifdef CONFIG_IEEE80211W
3857 tmp = group->GM_igtk;
3858 group->GM_igtk = group->GN_igtk;
3859 group->GN_igtk = tmp;
3860#endif /* CONFIG_IEEE80211W */
3861 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3862 * counting the STAs that are marked with GUpdateStationKeys instead of
3863 * including all STAs that could be in not-yet-completed state. */
3864 wpa_gtk_update(wpa_auth, group);
3865
3c183894
JM		 3866 if (group->GKeyDoneStations) {
3867 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3868 "GKeyDoneStations=%d when starting new GTK rekey",
3869 group->GKeyDoneStations);
3870 group->GKeyDoneStations = 0;
3871 }
473b6f22 3872 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3873 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3874 group->GKeyDoneStations);
3875}
3876
3877
1bdb7ab3
JM		 3878static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3879 struct wpa_group *group)
6fc6879b 3880{
3c7302c2
JM		 3881 int ret = 0;
3882
3c7302c2 3883 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3884 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3885 broadcast_ether_addr, group->GN,
3886 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3887 ret = -1;
6fc6879b
JM		 3888
3889#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3890 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3891 enum wpa_alg alg;
3892 size_t len;
3893
3894 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3895 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3896
3897 if (ret == 0 &&
3898 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3899 broadcast_ether_addr, group->GN_igtk,
3900 group->IGTK[group->GN_igtk - 4], len) < 0)
3901 ret = -1;
3902 }
6fc6879b 3903#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3904
3905 return ret;
6fc6879b
JM		 3906}
3907
3908
7d7f7be2
JM		 3909static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3910{
3911 if (sm->group == ctx) {
3912 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3913 " for discconnection due to fatal failure",
3914 MAC2STR(sm->addr));
3915 sm->Disconnect = TRUE;
3916 }
3917
3918 return 0;
3919}
3920
3921
3922static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3923 struct wpa_group *group)
3924{
3925 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3926 group->changed = TRUE;
3927 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3928 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3929}
3930
3931
1bdb7ab3
JM		 3932static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3933 struct wpa_group *group)
3934{
3935 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3936 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3937 group->changed = TRUE;
3938 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3939
7d7f7be2
JM		 3940 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3941 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3942 return -1;
7d7f7be2 3943 }
1bdb7ab3
JM		 3944
3945 return 0;
3946}
3947
3948
6fc6879b
JM		 3949static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3950 struct wpa_group *group)
3951{
3952 if (group->GInit) {
3953 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3954 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3955 /* Do not allow group operations */
6fc6879b
JM		 3956 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3957 group->GTKAuthenticator) {
3958 wpa_group_setkeysdone(wpa_auth, group);
3959 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3960 group->GTKReKey) {
3961 wpa_group_setkeys(wpa_auth, group);
3962 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3963 if (group->GKeyDoneStations == 0)
3964 wpa_group_setkeysdone(wpa_auth, group);
3965 else if (group->GTKReKey)
3966 wpa_group_setkeys(wpa_auth, group);
3967 }
3968}
3969
3970
e4a6ea1d 3971static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 3972{
3973 if (sm == NULL)
e4a6ea1d 3974 return 0;
6fc6879b
JM		 3975
3976 if (sm->in_step_loop) {
3977 /* This should not happen, but if it does, make sure we do not
3978 * end up freeing the state machine too early by exiting the
3979 * recursive call. */
3980 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 3981 return 0;
6fc6879b
JM		 3982 }
3983
3984 sm->in_step_loop = 1;
3985 do {
3986 if (sm->pending_deinit)
3987 break;
3988
3989 sm->changed = FALSE;
3990 sm->wpa_auth->group->changed = FALSE;
3991
3992 SM_STEP_RUN(WPA_PTK);
3993 if (sm->pending_deinit)
3994 break;
3995 SM_STEP_RUN(WPA_PTK_GROUP);
3996 if (sm->pending_deinit)
3997 break;
3998 wpa_group_sm_step(sm->wpa_auth, sm->group);
3999 } while (sm->changed || sm->wpa_auth->group->changed);
4000 sm->in_step_loop = 0;
4001
4002 if (sm->pending_deinit) {
4003 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
4004 "machine deinit for " MACSTR, MAC2STR(sm->addr));
4005 wpa_free_sta_sm(sm);
e4a6ea1d 4006 return 1;
6fc6879b 4007 }
e4a6ea1d 4008 return 0;
6fc6879b
JM		 4009}
4010
4011
4012static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
4013{
4014 struct wpa_state_machine *sm = eloop_ctx;
4015 wpa_sm_step(sm);
4016}
4017
4018
4019void wpa_auth_sm_notify(struct wpa_state_machine *sm)
4020{
4021 if (sm == NULL)
4022 return;
4023 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
4024}
4025
4026
4027void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
4028{
4029 int tmp, i;
4030 struct wpa_group *group;
4031
4032 if (wpa_auth == NULL)
4033 return;
4034
4035 group = wpa_auth->group;
4036
4037 for (i = 0; i < 2; i++) {
4038 tmp = group->GM;
4039 group->GM = group->GN;
4040 group->GN = tmp;
4041#ifdef CONFIG_IEEE80211W
4042 tmp = group->GM_igtk;
4043 group->GM_igtk = group->GN_igtk;
4044 group->GN_igtk = tmp;
4045#endif /* CONFIG_IEEE80211W */
4046 wpa_gtk_update(wpa_auth, group);
9354e594 4047 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 4048 }
4049}
4050
4051
a6da824b 4052static const char * wpa_bool_txt(int val)
6fc6879b 4053{
a6da824b 4054 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 4055}
4056
4057
6fc6879b
JM		 4058#define RSN_SUITE "%02x-%02x-%02x-%d"
4059#define RSN_SUITE_ARG(s) \
4060((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
4061
4062int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
4063{
4064 int len = 0, ret;
4065 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 4066#ifdef CONFIG_RSN_PREAUTH
4067 const int preauth = 1;
4068#else /* CONFIG_RSN_PREAUTH */
4069 const int preauth = 0;
4070#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 4071
4072 if (wpa_auth == NULL)
4073 return len;
4074
4075 ret = os_snprintf(buf + len, buflen - len,
4076 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 4077 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 4078 "dot11RSNAEnabled=%s\n"
4079 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 4080 wpa_bool_txt(preauth),
6fc6879b
JM		 4081 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
4082 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 4083 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4084 return len;
4085 len += ret;
4086
4087 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
4088 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
4089
4090 ret = os_snprintf(
4091 buf + len, buflen - len,
4092 "dot11RSNAConfigVersion=%u\n"
4093 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
4094 /* FIX: dot11RSNAConfigGroupCipher */
4095 /* FIX: dot11RSNAConfigGroupRekeyMethod */
4096 /* FIX: dot11RSNAConfigGroupRekeyTime */
4097 /* FIX: dot11RSNAConfigGroupRekeyPackets */
4098 "dot11RSNAConfigGroupRekeyStrict=%u\n"
4099 "dot11RSNAConfigGroupUpdateCount=%u\n"
4100 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
4101 "dot11RSNAConfigGroupCipherSize=%u\n"
4102 "dot11RSNAConfigPMKLifetime=%u\n"
4103 "dot11RSNAConfigPMKReauthThreshold=%u\n"
4104 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
4105 "dot11RSNAConfigSATimeout=%u\n"
4106 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
4107 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
4108 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
4109 "dot11RSNAPMKIDUsed=%s\n"
4110 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
4111 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
4112 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
4113 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
4114 "dot11RSNA4WayHandshakeFailures=%u\n"
4115 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
4116 RSN_VERSION,
4117 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 4118 wpa_auth->conf.wpa_group_update_count,
4119 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 4120 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 4121 dot11RSNAConfigPMKLifetime,
4122 dot11RSNAConfigPMKReauthThreshold,
4123 dot11RSNAConfigSATimeout,
4124 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
4125 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
4126 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
4127 pmkid_txt,
4128 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
4129 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
4130 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
4131 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
4132 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 4133 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4134 return len;
4135 len += ret;
4136
4137 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
4138 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
4139
4140 /* Private MIB */
4141 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
4142 wpa_auth->group->wpa_group_state);
d85e1fc8 4143 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4144 return len;
4145 len += ret;
4146
4147 return len;
4148}
4149
4150
4151int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
4152{
4153 int len = 0, ret;
4154 u32 pairwise = 0;
4155
4156 if (sm == NULL)
4157 return 0;
4158
4159 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
4160
4161 /* dot11RSNAStatsEntry */
4162
c3550295
JM		 4163 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
4164 WPA_PROTO_RSN : WPA_PROTO_WPA,
4165 sm->pairwise);
4166 if (pairwise == 0)
6fc6879b
JM		 4167 return 0;
4168
4169 ret = os_snprintf(
4170 buf + len, buflen - len,
4171 /* TODO: dot11RSNAStatsIndex */
4172 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
4173 "dot11RSNAStatsVersion=1\n"
4174 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
4175 /* TODO: dot11RSNAStatsTKIPICVErrors */
4176 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 4177 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 4178 /* TODO: dot11RSNAStatsCCMPReplays */
4179 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
4180 /* TODO: dot11RSNAStatsTKIPReplays */,
4181 MAC2STR(sm->addr),
4182 RSN_SUITE_ARG(pairwise),
4183 sm->dot11RSNAStatsTKIPLocalMICFailures,
4184 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 4185 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4186 return len;
4187 len += ret;
4188
4189 /* Private MIB */
4190 ret = os_snprintf(buf + len, buflen - len,
4191 "hostapdWPAPTKState=%d\n"
4192 "hostapdWPAPTKGroupState=%d\n",
4193 sm->wpa_ptk_state,
4194 sm->wpa_ptk_group_state);
d85e1fc8 4195 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4196 return len;
4197 len += ret;
4198
4199 return len;
4200}
4201
4202
4203void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
4204{
4205 if (wpa_auth)
4206 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
4207}
4208
4209
4210int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
4211{
4212 return sm && sm->pairwise_set;
4213}
4214
4215
ff36ff00
JM		 4216int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
4217{
4218 return sm->pairwise;
4219}
4220
4221
b08c9ad0
MK		 4222const u8 * wpa_auth_get_pmk(struct wpa_state_machine *sm, int *len)
4223{
4224 if (!sm)
4225 return NULL;
4226 *len = sm->pmk_len;
4227 return sm->PMK;
4228}
4229
4230
6fc6879b
JM		 4231int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
4232{
4233 if (sm == NULL)
4234 return -1;
4235 return sm->wpa_key_mgmt;
4236}
4237
4238
4239int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
4240{
4241 if (sm == NULL)
4242 return 0;
4243 return sm->wpa;
4244}
4245
4246
0e3bd7ac
MV		 4247int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
4248{
4249 if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
4250 return 0;
4251 return sm->tk_already_set;
4252}
4253
4254
2f1357fb
JM		 4255int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm)
4256{
4257 if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt))
4258 return 0;
4259 return sm->tk_already_set;
4260}
4261
4262
6fc6879b
JM		 4263int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
4264 struct rsn_pmksa_cache_entry *entry)
4265{
4266 if (sm == NULL || sm->pmksa != entry)
4267 return -1;
4268 sm->pmksa = NULL;
4269 return 0;
4270}
4271
4272
4273struct rsn_pmksa_cache_entry *
4274wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
4275{
4276 return sm ? sm->pmksa : NULL;
4277}
4278
4279
4280void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
4281{
4282 if (sm)
4283 sm->dot11RSNAStatsTKIPLocalMICFailures++;
4284}
4285
4286
4287const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
4288{
4289 if (wpa_auth == NULL)
4290 return NULL;
4291 *len = wpa_auth->wpa_ie_len;
4292 return wpa_auth->wpa_ie;
4293}
4294
4295
4296int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 4297 unsigned int pmk_len,
6fc6879b
JM		 4298 int session_timeout, struct eapol_state_machine *eapol)
4299{
cb465555
JM		 4300 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
4301 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 4302 return -1;
4303
834c5d68 4304 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
207976f0
JM		 4305 if (pmk_len > PMK_LEN_SUITE_B_192)
4306 pmk_len = PMK_LEN_SUITE_B_192;
4307 } else if (pmk_len > PMK_LEN) {
4308 pmk_len = PMK_LEN;
4309 }
4310
70c93963 4311 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 4312 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 4313 sm->wpa_auth->addr, sm->addr, session_timeout,
4314 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 4315 return 0;
4316
4317 return -1;
4318}
4319
4320
4321int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4322 const u8 *pmk, size_t len, const u8 *sta_addr,
4323 int session_timeout,
4324 struct eapol_state_machine *eapol)
4325{
4326 if (wpa_auth == NULL)
4327 return -1;
4328
70c93963 4329 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 4330 NULL, 0,
4331 wpa_auth->addr,
4bb081f1
JM		 4332 sta_addr, session_timeout, eapol,
4333 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 4334 return 0;
4335
4336 return -1;
4337}
4338
4339
f2991170 4340int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 4341 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 4342{
4343 if (wpa_auth->conf.disable_pmksa_caching)
4344 return -1;
4345
70c93963 4346 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 4347 NULL, 0,
f2991170
JM		 4348 wpa_auth->addr, addr, 0, NULL,
4349 WPA_KEY_MGMT_SAE))
4350 return 0;
4351
4352 return -1;
4353}
4354
4355
9d94e4bb
JM		 4356void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid)
4357{
4358 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4359 sm->pmkid_set = 1;
4360}
4361
4362
0c52953b
JM		 4363int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4364 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4365 int session_timeout, int akmp)
4366{
4367 if (wpa_auth->conf.disable_pmksa_caching)
4368 return -1;
4369
4370 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4371 NULL, 0, wpa_auth->addr, addr, session_timeout,
4372 NULL, akmp))
4373 return 0;
4374
4375 return -1;
4376}
4377
4378
901d1fe1
JM		 4379void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4380 const u8 *sta_addr)
4381{
4382 struct rsn_pmksa_cache_entry *pmksa;
4383
4384 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4385 return;
4386 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4387 if (pmksa) {
4388 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4389 MACSTR " based on request", MAC2STR(sta_addr));
4390 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4391 }
4392}
4393
4394
b8daac18
MH		 4395int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4396 size_t len)
4397{
4398 if (!wpa_auth || !wpa_auth->pmksa)
4399 return 0;
4400 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4401}
4402
4403
4c522c77
MH		 4404void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4405{
4406 if (wpa_auth && wpa_auth->pmksa)
4407 pmksa_cache_auth_flush(wpa_auth->pmksa);
4408}
4409
4410
4d77d80e
MH		 4411#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4412#ifdef CONFIG_MESH
4413
4414int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4415 char *buf, size_t len)
4416{
4417 if (!wpa_auth || !wpa_auth->pmksa)
4418 return 0;
4419
4420 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4421}
4422
4423
4424struct rsn_pmksa_cache_entry *
4425wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4426 const u8 *pmkid, int expiration)
4427{
4428 struct rsn_pmksa_cache_entry *entry;
4429 struct os_reltime now;
4430
4431 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4432 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4433 if (!entry)
4434 return NULL;
4435
4436 os_get_reltime(&now);
4437 entry->expiration = now.sec + expiration;
4438 return entry;
4439}
4440
4441
4442int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4443 struct rsn_pmksa_cache_entry *entry)
4444{
4445 int ret;
4446
4447 if (!wpa_auth || !wpa_auth->pmksa)
4448 return -1;
4449
4450 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4451 if (ret < 0)
4452 wpa_printf(MSG_DEBUG,
4453 "RSN: Failed to store external PMKSA cache for "
4454 MACSTR, MAC2STR(entry->spa));
4455
4456 return ret;
4457}
4458
4459#endif /* CONFIG_MESH */
4460#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4461
4462
9f2cf23e 4463struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 4464wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4465 const u8 *pmkid)
9f2cf23e
MH		 4466{
4467 if (!wpa_auth || !wpa_auth->pmksa)
4468 return NULL;
c1bd4bac 4469 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 4470}
4471
4472
4473void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4474 struct wpa_state_machine *sm,
4475 struct wpa_authenticator *wpa_auth,
4476 u8 *pmkid, u8 *pmk)
4477{
4478 if (!sm)
4479 return;
4480
4481 sm->pmksa = pmksa;
8854f90b
JM		 4482 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4483 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4484 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 4485}
4486
4487
a0ad9e8c
MB		 4488/*
4489 * Remove and free the group from wpa_authenticator. This is triggered by a
4490 * callback to make sure nobody is currently iterating the group list while it
4491 * gets modified.
4492 */
4493static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4494 struct wpa_group *group)
4495{
4496 struct wpa_group *prev = wpa_auth->group;
4497
4498 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4499 group->vlan_id);
4500
4501 while (prev) {
4502 if (prev->next == group) {
4503 /* This never frees the special first group as needed */
4504 prev->next = group->next;
4505 os_free(group);
4506 break;
4507 }
4508 prev = prev->next;
4509 }
4510
4511}
4512
4513
4514/* Increase the reference counter for group */
4515static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4516 struct wpa_group *group)
4517{
4518 /* Skip the special first group */
4519 if (wpa_auth->group == group)
4520 return;
4521
4522 group->references++;
4523}
4524
4525
4526/* Decrease the reference counter and maybe free the group */
4527static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4528 struct wpa_group *group)
4529{
4530 /* Skip the special first group */
4531 if (wpa_auth->group == group)
4532 return;
4533
4534 group->references--;
4535 if (group->references)
4536 return;
4537 wpa_group_free(wpa_auth, group);
4538}
4539
4540
4541/*
4542 * Add a group that has its references counter set to zero. Caller needs to
4543 * call wpa_group_get() on the return value to mark the entry in use.
4544 */
6fc6879b
JM		 4545static struct wpa_group *
4546wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4547{
4548 struct wpa_group *group;
4549
4550 if (wpa_auth == NULL || wpa_auth->group == NULL)
4551 return NULL;
4552
4553 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4554 vlan_id);
bdffdc5d 4555 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4556 if (group == NULL)
4557 return NULL;
4558
4559 group->next = wpa_auth->group->next;
4560 wpa_auth->group->next = group;
4561
4562 return group;
4563}
4564
4565
7cebc8e2
MB		 4566/*
4567 * Enforce that the group state machine for the VLAN is running, increase
4568 * reference counter as interface is up. References might have been increased
4569 * even if a negative value is returned.
4570 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4571 */
4572int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4573{
4574 struct wpa_group *group;
4575
4576 if (wpa_auth == NULL)
4577 return 0;
4578
4579 group = wpa_auth->group;
4580 while (group) {
4581 if (group->vlan_id == vlan_id)
4582 break;
4583 group = group->next;
4584 }
4585
4586 if (group == NULL) {
4587 group = wpa_auth_add_group(wpa_auth, vlan_id);
4588 if (group == NULL)
4589 return -1;
4590 }
4591
4592 wpa_printf(MSG_DEBUG,
4593 "WPA: Ensure group state machine running for VLAN ID %d",
4594 vlan_id);
4595
4596 wpa_group_get(wpa_auth, group);
4597 group->num_setup_iface++;
4598
4599 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4600 return -1;
4601
4602 return 0;
4603}
4604
4605
4606/*
4607 * Decrease reference counter, expected to be zero afterwards.
4608 * returns: -1 on error (group not found, group in fail state)
4609 * -2 if wpa_group is still referenced
4610 * 0 else
4611 */
4612int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4613{
4614 struct wpa_group *group;
4615 int ret = 0;
4616
4617 if (wpa_auth == NULL)
4618 return 0;
4619
4620 group = wpa_auth->group;
4621 while (group) {
4622 if (group->vlan_id == vlan_id)
4623 break;
4624 group = group->next;
4625 }
4626
4627 if (group == NULL)
4628 return -1;
4629
4630 wpa_printf(MSG_DEBUG,
4631 "WPA: Try stopping group state machine for VLAN ID %d",
4632 vlan_id);
4633
4634 if (group->num_setup_iface <= 0) {
4635 wpa_printf(MSG_ERROR,
4636 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4637 vlan_id);
4638 return -1;
4639 }
4640 group->num_setup_iface--;
4641
4642 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4643 ret = -1;
4644
4645 if (group->references > 1) {
4646 wpa_printf(MSG_DEBUG,
4647 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4648 vlan_id);
4649 ret = -2;
4650 }
4651
4652 wpa_group_put(wpa_auth, group);
4653
4654 return ret;
4655}
4656
4657
6fc6879b
JM		 4658int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4659{
4660 struct wpa_group *group;
4661
4662 if (sm == NULL || sm->wpa_auth == NULL)
4663 return 0;
4664
4665 group = sm->wpa_auth->group;
4666 while (group) {
4667 if (group->vlan_id == vlan_id)
4668 break;
4669 group = group->next;
4670 }
4671
4672 if (group == NULL) {
4673 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4674 if (group == NULL)
4675 return -1;
4676 }
4677
4678 if (sm->group == group)
4679 return 0;
4680
7d7f7be2
JM		 4681 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4682 return -1;
4683
6fc6879b
JM		 4684 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4685 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4686
a0ad9e8c
MB		 4687 wpa_group_get(sm->wpa_auth, group);
4688 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4689 sm->group = group;
a0ad9e8c 4690
6fc6879b
JM		 4691 return 0;
4692}
e4bf4db9
JM		 4693
4694
4695void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4696 struct wpa_state_machine *sm, int ack)
4697{
4698 if (wpa_auth == NULL || sm == NULL)
4699 return;
4700 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4701 " ack=%d", MAC2STR(sm->addr), ack);
4702 if (sm->pending_1_of_4_timeout && ack) {
4703 /*
4704 * Some deployed supplicant implementations update their SNonce
4705 * for each EAPOL-Key 2/4 message even within the same 4-way
4706 * handshake and then fail to use the first SNonce when
4707 * deriving the PTK. This results in unsuccessful 4-way
4708 * handshake whenever the relatively short initial timeout is
4709 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4710 * around this by increasing the timeout now that we know that
4711 * the station has received the frame.
4712 */
4713 int timeout_ms = eapol_key_timeout_subseq;
4714 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4715 "timeout by %u ms because of acknowledged frame",
4716 timeout_ms);
4717 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4718 eloop_register_timeout(timeout_ms / 1000,
4719 (timeout_ms % 1000) * 1000,
4720 wpa_send_eapol_timeout, wpa_auth, sm);
4721 }
3d695328
JM		 4722
4723#ifdef CONFIG_TESTING_OPTIONS
4724 if (sm->eapol_status_cb) {
4725 sm->eapol_status_cb(sm->eapol_status_cb_ctx1,
4726 sm->eapol_status_cb_ctx2);
4727 sm->eapol_status_cb = NULL;
4728 }
4729#endif /* CONFIG_TESTING_OPTIONS */
e4bf4db9 4730}
c10347f2
JM		 4731
4732
4733int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4734{
4735 if (sm == NULL)
4736 return 0;
4737 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4738}
aa189ac9
JM		 4739
4740
4741int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4742{
4743 if (sm == NULL)
4744 return 0;
4745 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4746}
25ef8529
JM		 4747
4748
4749#ifdef CONFIG_P2P
4750int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4751{
4752 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4753 return -1;
4754 os_memcpy(addr, sm->ip_addr, 4);
4755 return 0;
4756}
4757#endif /* CONFIG_P2P */
cbc210de
JM		 4758
4759
4760int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4761 struct radius_das_attrs *attr)
4762{
4763 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4764}
34782730
JM		 4765
4766
4767void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4768{
4769 struct wpa_group *group;
4770
4771 if (!wpa_auth)
4772 return;
4773 for (group = wpa_auth->group; group; group = group->next)
4774 wpa_group_config_group_keys(wpa_auth, group);
4775}
7eace378
JM		 4776
4777
4778#ifdef CONFIG_FILS
4779
4780struct wpa_auth_fils_iter_data {
4781 struct wpa_authenticator *auth;
4782 const u8 *cache_id;
4783 struct rsn_pmksa_cache_entry *pmksa;
4784 const u8 *spa;
4785 const u8 *pmkid;
4786};
4787
4788
4789static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4790{
4791 struct wpa_auth_fils_iter_data *data = ctx;
4792
4cc6574d 4793 if (a == data->auth || !a->conf.fils_cache_id_set ||
7eace378
JM		 4794 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4795 FILS_CACHE_ID_LEN) != 0)
4796 return 0;
4797 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4798 return data->pmksa != NULL;
4799}
4800
4801
4802struct rsn_pmksa_cache_entry *
4803wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4804 const u8 *sta_addr, const u8 *pmkid)
4805{
4806 struct wpa_auth_fils_iter_data idata;
4807
4808 if (!wpa_auth->conf.fils_cache_id_set)
4809 return NULL;
4810 idata.auth = wpa_auth;
4811 idata.cache_id = wpa_auth->conf.fils_cache_id;
4812 idata.pmksa = NULL;
4813 idata.spa = sta_addr;
4814 idata.pmkid = pmkid;
4815 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4816 return idata.pmksa;
4817}
4818
5db997e3
JM		 4819
4820#ifdef CONFIG_IEEE80211R_AP
a7968ea5
JM		 4821int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384,
4822 u8 *buf, size_t len)
5db997e3
JM		 4823{
4824 struct wpa_auth_config *conf = &wpa_auth->conf;
4825
a7968ea5 4826 return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder,
5db997e3
JM		 4827 conf->r0_key_holder_len,
4828 NULL, NULL, buf, len, NULL, 0);
4829}
4830#endif /* CONFIG_IEEE80211R_AP */
4831
8acbf85f
JM		 4832
4833void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4834 u8 *fils_anonce, u8 *fils_snonce,
4835 u8 *fils_kek, size_t *fils_kek_len)
4836{
4837 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4838 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4839 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4840 *fils_kek_len = sm->PTK.kek_len;
4841}
4842
7eace378 4843#endif /* CONFIG_FILS */
6bc2f00f
JM		 4844
4845
36536639
JM		 4846void wpa_auth_set_auth_alg(struct wpa_state_machine *sm, u16 auth_alg)
4847{
4848 if (sm)
4849 sm->auth_alg = auth_alg;
4850}
4851
4852
10ec6a5f
JM		 4853#ifdef CONFIG_DPP2
4854void wpa_auth_set_dpp_z(struct wpa_state_machine *sm, const struct wpabuf *z)
4855{
4856 if (sm) {
4857 wpabuf_clear_free(sm->dpp_z);
4858 sm->dpp_z = z ? wpabuf_dup(z) : NULL;
4859 }
4860}
4861#endif /* CONFIG_DPP2 */
4862
4863
82424732 4864#ifdef CONFIG_TESTING_OPTIONS
d8afdb21 4865
3d695328
JM		 4866int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce,
4867 void (*cb)(void *ctx1, void *ctx2),
4868 void *ctx1, void *ctx2)
d8afdb21
JM		 4869{
4870 const u8 *anonce = sm->ANonce;
4871 u8 anonce_buf[WPA_NONCE_LEN];
4872
4873 if (change_anonce) {
4874 if (random_get_bytes(anonce_buf, WPA_NONCE_LEN))
4875 return -1;
4876 anonce = anonce_buf;
4877 }
4878
4879 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4880 "sending 1/4 msg of 4-Way Handshake (TESTING)");
4881 wpa_send_eapol(sm->wpa_auth, sm,
4882 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
4883 anonce, NULL, 0, 0, 0);
4884 return 0;
4885}
4886
4887
3d695328
JM		 4888int wpa_auth_resend_m3(struct wpa_state_machine *sm,
4889 void (*cb)(void *ctx1, void *ctx2),
4890 void *ctx1, void *ctx2)
d8afdb21 4891{
0c3bc1be
LD		 4892 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
4893#ifdef CONFIG_IEEE80211W
4894 u8 *opos;
4895#endif /* CONFIG_IEEE80211W */
d8afdb21
JM		 4896 size_t gtk_len, kde_len;
4897 struct wpa_group *gsm = sm->group;
4898 u8 *wpa_ie;
4899 int wpa_ie_len, secure, keyidx, encr = 0;
4900
4901 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
4902 GTK[GN], IGTK, [FTIE], [TIE * 2])
4903 */
4904
4905 /* Use 0 RSC */
4906 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4907 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
4908 wpa_ie = sm->wpa_auth->wpa_ie;
4909 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
4910 if (sm->wpa == WPA_VERSION_WPA &&
4911 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
4912 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
4913 /* WPA-only STA, remove RSN IE and possible MDIE */
4914 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4915 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
4916 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4917 wpa_ie_len = wpa_ie[1] + 2;
4918 }
4919 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4920 "sending 3/4 msg of 4-Way Handshake (TESTING)");
4921 if (sm->wpa == WPA_VERSION_WPA2) {
4922 /* WPA2 send GTK in the 4-way handshake */
4923 secure = 1;
4924 gtk = gsm->GTK[gsm->GN - 1];
4925 gtk_len = gsm->GTK_len;
4926 keyidx = gsm->GN;
4927 _rsc = rsc;
4928 encr = 1;
4929 } else {
4930 /* WPA does not include GTK in msg 3/4 */
4931 secure = 0;
4932 gtk = NULL;
4933 gtk_len = 0;
4934 keyidx = 0;
4935 _rsc = NULL;
4936 if (sm->rx_eapol_key_secure) {
4937 /*
4938 * It looks like Windows 7 supplicant tries to use
4939 * Secure bit in msg 2/4 after having reported Michael
4940 * MIC failure and it then rejects the 4-way handshake
4941 * if msg 3/4 does not set Secure bit. Work around this
4942 * by setting the Secure bit here even in the case of
4943 * WPA if the supplicant used it first.
4944 */
4945 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4946 "STA used Secure bit in WPA msg 2/4 - "
4947 "set Secure for 3/4 as workaround");
4948 secure = 1;
4949 }
4950 }
4951
17c2559c 4952 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
d8afdb21
JM		 4953 if (gtk)
4954 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4955#ifdef CONFIG_IEEE80211R_AP
4956 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4957 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
4958 kde_len += 300; /* FTIE + 2 * TIE */
4959 }
4960#endif /* CONFIG_IEEE80211R_AP */
4961 kde = os_malloc(kde_len);
4962 if (kde == NULL)
4963 return -1;
4964
4965 pos = kde;
4966 os_memcpy(pos, wpa_ie, wpa_ie_len);
4967 pos += wpa_ie_len;
4968#ifdef CONFIG_IEEE80211R_AP
4969 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4970 int res;
4971 size_t elen;
4972
4973 elen = pos - kde;
4974 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
4975 if (res < 0) {
4976 wpa_printf(MSG_ERROR, "FT: Failed to insert "
4977 "PMKR1Name into RSN IE in EAPOL-Key data");
4978 os_free(kde);
4979 return -1;
4980 }
4981 pos -= wpa_ie_len;
4982 pos += elen;
4983 }
4984#endif /* CONFIG_IEEE80211R_AP */
4985 if (gtk) {
4986 u8 hdr[2];
4987 hdr[0] = keyidx & 0x03;
4988 hdr[1] = 0;
4989 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
4990 gtk, gtk_len);
4991 }
0c3bc1be 4992#ifdef CONFIG_IEEE80211W
d8afdb21
JM		 4993 opos = pos;
4994 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 4995 if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
4996 /* skip KDE header and keyid */
4997 opos += 2 + RSN_SELECTOR_LEN + 2;
d8afdb21
JM		 4998 os_memset(opos, 0, 6); /* clear PN */
4999 }
0c3bc1be 5000#endif /* CONFIG_IEEE80211W */
17c2559c
MV		 5001 if (ocv_oci_add(sm, &pos) < 0) {
5002 os_free(kde);
5003 return -1;
5004 }
d8afdb21
JM		 5005
5006#ifdef CONFIG_IEEE80211R_AP
5007 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5008 int res;
5009 struct wpa_auth_config *conf;
5010
5011 conf = &sm->wpa_auth->conf;
5012 if (sm->assoc_resp_ftie &&
5013 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
5014 os_memcpy(pos, sm->assoc_resp_ftie,
5015 2 + sm->assoc_resp_ftie[1]);
5016 res = 2 + sm->assoc_resp_ftie[1];
5017 } else {
a7968ea5
JM		 5018 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
5019
5020 res = wpa_write_ftie(conf, use_sha384,
5021 conf->r0_key_holder,
d8afdb21
JM		 5022 conf->r0_key_holder_len,
5023 NULL, NULL, pos,
5024 kde + kde_len - pos,
5025 NULL, 0);
5026 }
5027 if (res < 0) {
5028 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
5029 "into EAPOL-Key Key Data");
5030 os_free(kde);
5031 return -1;
5032 }
5033 pos += res;
5034
5035 /* TIE[ReassociationDeadline] (TU) */
5036 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5037 *pos++ = 5;
5038 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
5039 WPA_PUT_LE32(pos, conf->reassociation_deadline);
5040 pos += 4;
5041
5042 /* TIE[KeyLifetime] (seconds) */
5043 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5044 *pos++ = 5;
5045 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 5046 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
d8afdb21
JM		 5047 pos += 4;
5048 }
5049#endif /* CONFIG_IEEE80211R_AP */
5050
5051 wpa_send_eapol(sm->wpa_auth, sm,
5052 (secure ? WPA_KEY_INFO_SECURE : 0) |
5053 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5054 WPA_KEY_INFO_MIC : 0) |
5055 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
5056 WPA_KEY_INFO_KEY_TYPE,
5057 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
5058 os_free(kde);
5059 return 0;
5060}
5061
5062
3d695328
JM		 5063int wpa_auth_resend_group_m1(struct wpa_state_machine *sm,
5064 void (*cb)(void *ctx1, void *ctx2),
5065 void *ctx1, void *ctx2)
6bc2f00f
JM		 5066{
5067 u8 rsc[WPA_KEY_RSC_LEN];
5068 struct wpa_group *gsm = sm->group;
5069 const u8 *kde;
0c3bc1be
LD		 5070 u8 *kde_buf = NULL, *pos, hdr[2];
5071#ifdef CONFIG_IEEE80211W
5072 u8 *opos;
5073#endif /* CONFIG_IEEE80211W */
6bc2f00f
JM		 5074 size_t kde_len;
5075 u8 *gtk;
5076
5077 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
5078 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
5079 /* Use 0 RSC */
5080 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5081 "sending 1/2 msg of Group Key Handshake (TESTING)");
5082
5083 gtk = gsm->GTK[gsm->GN - 1];
5084 if (sm->wpa == WPA_VERSION_WPA2) {
5085 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
17c2559c 5086 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
6bc2f00f
JM		 5087 kde_buf = os_malloc(kde_len);
5088 if (kde_buf == NULL)
5089 return -1;
5090
5091 kde = pos = kde_buf;
5092 hdr[0] = gsm->GN & 0x03;
5093 hdr[1] = 0;
5094 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5095 gtk, gsm->GTK_len);
0c3bc1be 5096#ifdef CONFIG_IEEE80211W
6bc2f00f
JM		 5097 opos = pos;
5098 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 5099 if (pos - opos >=
5100 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5101 /* skip KDE header and keyid */
5102 opos += 2 + RSN_SELECTOR_LEN + 2;
6bc2f00f
JM		 5103 os_memset(opos, 0, 6); /* clear PN */
5104 }
0c3bc1be 5105#endif /* CONFIG_IEEE80211W */
17c2559c
MV		 5106 if (ocv_oci_add(sm, &pos) < 0) {
5107 os_free(kde_buf);
5108 return -1;
5109 }
6bc2f00f
JM		 5110 kde_len = pos - kde;
5111 } else {
5112 kde = gtk;
5113 kde_len = gsm->GTK_len;
5114 }
5115
3d695328
JM		 5116 sm->eapol_status_cb = cb;
5117 sm->eapol_status_cb_ctx1 = ctx1;
5118 sm->eapol_status_cb_ctx2 = ctx2;
5119
6bc2f00f
JM		 5120 wpa_send_eapol(sm->wpa_auth, sm,
5121 WPA_KEY_INFO_SECURE |
5122 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5123 WPA_KEY_INFO_MIC : 0) |
5124 WPA_KEY_INFO_ACK |
5125 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
5126 rsc, NULL, kde, kde_len, gsm->GN, 1);
5127
5128 os_free(kde_buf);
5129 return 0;
5130}
d8afdb21 5131
92662fb2
JB		 5132
5133int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth)
5134{
5135 if (!wpa_auth)
5136 return -1;
5137 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
5138 return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL);
5139}
5140
6bc2f00f 5141#endif /* CONFIG_TESTING_OPTIONS */
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