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FT: Derive PTK properly for rekeying with FT protocol
[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
a40bd06e
JM		 323void wpa_auth_set_ptk_rekey_timer(struct wpa_state_machine *sm)
324{
325 if (sm && sm->wpa_auth->conf.wpa_ptk_rekey) {
326 wpa_printf(MSG_DEBUG, "WPA: Start PTK rekeying timer for "
327 MACSTR " (%d seconds)", MAC2STR(sm->addr),
328 sm->wpa_auth->conf.wpa_ptk_rekey);
329 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
330 eloop_register_timeout(sm->wpa_auth->conf.wpa_ptk_rekey, 0,
331 wpa_rekey_ptk, sm->wpa_auth, sm);
332 }
333}
334
335
6fc6879b
JM		 336static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
337{
338 if (sm->pmksa == ctx)
339 sm->pmksa = NULL;
340 return 0;
341}
342
343
344static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
345 void *ctx)
346{
347 struct wpa_authenticator *wpa_auth = ctx;
348 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
349}
350
351
1bdb7ab3
JM		 352static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
353 struct wpa_group *group)
354{
559cdabb 355 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 356 u8 rkey[32];
559cdabb 357 unsigned long ptr;
1bdb7ab3 358
3642c431 359 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 360 return -1;
361 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
362
363 /*
364 * Counter = PRF-256(Random number, "Init Counter",
365 * Local MAC Address || Time)
366 */
367 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
368 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 369 ptr = (unsigned long) group;
370 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
525923b1
JM		 371#ifdef TEST_FUZZ
372 os_memset(buf + ETH_ALEN, 0xab, 8);
373 os_memset(buf + ETH_ALEN + 8, 0xcd, sizeof(ptr));
374#endif /* TEST_FUZZ */
3642c431 375 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 376 return -1;
377
378 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
379 group->Counter, WPA_NONCE_LEN) < 0)
380 return -1;
381 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
382 group->Counter, WPA_NONCE_LEN);
383
384 return 0;
385}
386
387
e6965d4e 388static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 389 int vlan_id, int delay_init)
e6965d4e
JM		 390{
391 struct wpa_group *group;
e6965d4e
JM		 392
393 group = os_zalloc(sizeof(struct wpa_group));
394 if (group == NULL)
395 return NULL;
396
397 group->GTKAuthenticator = TRUE;
398 group->vlan_id = vlan_id;
c3550295 399 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 400
08704cd8
JM		 401 if (random_pool_ready() != 1) {
402 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
403 "for secure operations - update keys later when "
404 "the first station connects");
405 }
406
1bdb7ab3
JM		 407 /*
408 * Set initial GMK/Counter value here. The actual values that will be
409 * used in negotiations will be set once the first station tries to
410 * connect. This allows more time for collecting additional randomness
411 * on embedded devices.
6fc6879b 412 */
1bdb7ab3 413 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 414 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
415 "initialization.");
416 os_free(group);
417 return NULL;
418 }
6fc6879b
JM		 419
420 group->GInit = TRUE;
bdffdc5d
JM		 421 if (delay_init) {
422 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
423 "until Beacon frames have been configured");
424 /* Initialization is completed in wpa_init_keys(). */
425 } else {
426 wpa_group_sm_step(wpa_auth, group);
427 group->GInit = FALSE;
428 wpa_group_sm_step(wpa_auth, group);
429 }
6fc6879b
JM		 430
431 return group;
432}
433
434
435/**
436 * wpa_init - Initialize WPA authenticator
437 * @addr: Authenticator address
438 * @conf: Configuration for WPA authenticator
a17df5fb 439 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 440 * Returns: Pointer to WPA authenticator data or %NULL on failure
441 */
442struct wpa_authenticator * wpa_init(const u8 *addr,
443 struct wpa_auth_config *conf,
cef8fac0
JB		 444 const struct wpa_auth_callbacks *cb,
445 void *cb_ctx)
6fc6879b
JM		 446{
447 struct wpa_authenticator *wpa_auth;
448
449 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
450 if (wpa_auth == NULL)
451 return NULL;
452 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
453 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
cef8fac0
JB		 454 wpa_auth->cb = cb;
455 wpa_auth->cb_ctx = cb_ctx;
6fc6879b
JM		 456
457 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
458 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
459 os_free(wpa_auth);
460 return NULL;
461 }
462
bdffdc5d 463 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 464 if (wpa_auth->group == NULL) {
465 os_free(wpa_auth->wpa_ie);
466 os_free(wpa_auth);
467 return NULL;
468 }
469
4bb081f1
JM		 470 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
471 wpa_auth);
6fc6879b
JM		 472 if (wpa_auth->pmksa == NULL) {
473 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 474 os_free(wpa_auth->group);
6fc6879b
JM		 475 os_free(wpa_auth->wpa_ie);
476 os_free(wpa_auth);
477 return NULL;
478 }
479
4ec1fd8e 480#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 481 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
482 if (wpa_auth->ft_pmk_cache == NULL) {
483 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 484 os_free(wpa_auth->group);
6fc6879b 485 os_free(wpa_auth->wpa_ie);
4bb081f1 486 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 487 os_free(wpa_auth);
488 return NULL;
489 }
4ec1fd8e 490#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 491
492 if (wpa_auth->conf.wpa_gmk_rekey) {
493 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
494 wpa_rekey_gmk, wpa_auth, NULL);
495 }
496
497 if (wpa_auth->conf.wpa_group_rekey) {
498 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
499 wpa_rekey_gtk, wpa_auth, NULL);
500 }
501
25ef8529
JM		 502#ifdef CONFIG_P2P
503 if (WPA_GET_BE32(conf->ip_addr_start)) {
504 int count = WPA_GET_BE32(conf->ip_addr_end) -
505 WPA_GET_BE32(conf->ip_addr_start) + 1;
506 if (count > 1000)
507 count = 1000;
508 if (count > 0)
509 wpa_auth->ip_pool = bitfield_alloc(count);
510 }
511#endif /* CONFIG_P2P */
512
6fc6879b
JM		 513 return wpa_auth;
514}
515
516
bdffdc5d
JM		 517int wpa_init_keys(struct wpa_authenticator *wpa_auth)
518{
519 struct wpa_group *group = wpa_auth->group;
520
521 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
522 "keys");
523 wpa_group_sm_step(wpa_auth, group);
524 group->GInit = FALSE;
525 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 526 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
527 return -1;
bdffdc5d
JM		 528 return 0;
529}
530
531
6fc6879b
JM		 532/**
533 * wpa_deinit - Deinitialize WPA authenticator
534 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
535 */
536void wpa_deinit(struct wpa_authenticator *wpa_auth)
537{
538 struct wpa_group *group, *prev;
539
540 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
541 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
542
4bb081f1 543 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b 544
4ec1fd8e 545#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 546 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
547 wpa_auth->ft_pmk_cache = NULL;
eefe8630 548 wpa_ft_deinit(wpa_auth);
4ec1fd8e 549#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 550
25ef8529
JM		 551#ifdef CONFIG_P2P
552 bitfield_free(wpa_auth->ip_pool);
553#endif /* CONFIG_P2P */
554
555
6fc6879b
JM		 556 os_free(wpa_auth->wpa_ie);
557
558 group = wpa_auth->group;
559 while (group) {
560 prev = group;
561 group = group->next;
562 os_free(prev);
563 }
564
565 os_free(wpa_auth);
566}
567
568
569/**
570 * wpa_reconfig - Update WPA authenticator configuration
571 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
572 * @conf: Configuration for WPA authenticator
573 */
574int wpa_reconfig(struct wpa_authenticator *wpa_auth,
575 struct wpa_auth_config *conf)
576{
e6965d4e 577 struct wpa_group *group;
6fc6879b
JM		 578 if (wpa_auth == NULL)
579 return 0;
580
581 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 582 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
583 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
584 return -1;
585 }
586
e6965d4e
JM		 587 /*
588 * Reinitialize GTK to make sure it is suitable for the new
589 * configuration.
590 */
591 group = wpa_auth->group;
c3550295 592 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 593 group->GInit = TRUE;
594 wpa_group_sm_step(wpa_auth, group);
595 group->GInit = FALSE;
596 wpa_group_sm_step(wpa_auth, group);
597
6fc6879b
JM		 598 return 0;
599}
600
601
602struct wpa_state_machine *
94ddef3e
JM		 603wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
604 const u8 *p2p_dev_addr)
6fc6879b
JM		 605{
606 struct wpa_state_machine *sm;
607
7d7f7be2
JM		 608 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
609 return NULL;
610
6fc6879b
JM		 611 sm = os_zalloc(sizeof(struct wpa_state_machine));
612 if (sm == NULL)
613 return NULL;
614 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 615 if (p2p_dev_addr)
616 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 617
618 sm->wpa_auth = wpa_auth;
619 sm->group = wpa_auth->group;
a0ad9e8c 620 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 621
622 return sm;
623}
624
625
6f9b5d16
JM		 626int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
627 struct wpa_state_machine *sm)
6fc6879b
JM		 628{
629 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 630 return -1;
6fc6879b 631
4ec1fd8e 632#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 633 if (sm->ft_completed) {
634 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
635 "FT authentication already completed - do not "
636 "start 4-way handshake");
3d4d2348
JM		 637 /* Go to PTKINITDONE state to allow GTK rekeying */
638 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 639 sm->Pair = TRUE;
6f9b5d16 640 return 0;
6fc6879b 641 }
4ec1fd8e 642#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 643
07e0117d
JM		 644#ifdef CONFIG_FILS
645 if (sm->fils_completed) {
646 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
647 "FILS authentication already completed - do not start 4-way handshake");
648 /* Go to PTKINITDONE state to allow GTK rekeying */
649 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 650 sm->Pair = TRUE;
07e0117d
JM		 651 return 0;
652 }
653#endif /* CONFIG_FILS */
654
6fc6879b 655 if (sm->started) {
22a299ee 656 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 657 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 658 return wpa_sm_step(sm);
6fc6879b
JM		 659 }
660
661 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
662 "start authentication");
663 sm->started = 1;
664
665 sm->Init = TRUE;
e4a6ea1d 666 if (wpa_sm_step(sm) == 1)
6f9b5d16 667 return 1; /* should not really happen */
6fc6879b
JM		 668 sm->Init = FALSE;
669 sm->AuthenticationRequest = TRUE;
6f9b5d16 670 return wpa_sm_step(sm);
6fc6879b
JM		 671}
672
673
a8d05fca
JM		 674void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
675{
676 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
677 * reassociates back to the same AP while the previous entry for the
678 * STA has not yet been removed. */
679 if (sm == NULL)
680 return;
681
682 sm->wpa_key_mgmt = 0;
683}
684
685
6fc6879b
JM		 686static void wpa_free_sta_sm(struct wpa_state_machine *sm)
687{
25ef8529
JM		 688#ifdef CONFIG_P2P
689 if (WPA_GET_BE32(sm->ip_addr)) {
690 u32 start;
691 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
692 "address %u.%u.%u.%u from " MACSTR,
693 sm->ip_addr[0], sm->ip_addr[1],
694 sm->ip_addr[2], sm->ip_addr[3],
695 MAC2STR(sm->addr));
696 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
697 bitfield_clear(sm->wpa_auth->ip_pool,
698 WPA_GET_BE32(sm->ip_addr) - start);
699 }
700#endif /* CONFIG_P2P */
2ade8ef2
JM		 701 if (sm->GUpdateStationKeys) {
702 sm->group->GKeyDoneStations--;
703 sm->GUpdateStationKeys = FALSE;
704 }
4ec1fd8e 705#ifdef CONFIG_IEEE80211R_AP
0f857f43 706 os_free(sm->assoc_resp_ftie);
692ec305 707 wpabuf_free(sm->ft_pending_req_ies);
4ec1fd8e 708#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 709 os_free(sm->last_rx_eapol_key);
710 os_free(sm->wpa_ie);
a0ad9e8c 711 wpa_group_put(sm->wpa_auth, sm->group);
10ec6a5f
JM		 712#ifdef CONFIG_DPP2
713 wpabuf_clear_free(sm->dpp_z);
714#endif /* CONFIG_DPP2 */
09ab81b9 715 bin_clear_free(sm, sizeof(*sm));
6fc6879b
JM		 716}
717
718
719void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
720{
721 if (sm == NULL)
722 return;
723
724 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
725 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
726 "strict rekeying - force GTK rekey since STA "
727 "is leaving");
3f5a1860
JB		 728 if (eloop_deplete_timeout(0, 500000, wpa_rekey_gtk,
729 sm->wpa_auth, NULL) == -1)
730 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
731 NULL);
6fc6879b
JM		 732 }
733
734 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 735 sm->pending_1_of_4_timeout = 0;
6fc6879b 736 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 737 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3a46cf93
MB		 738#ifdef CONFIG_IEEE80211R_AP
739 wpa_ft_sta_deinit(sm);
740#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 741 if (sm->in_step_loop) {
742 /* Must not free state machine while wpa_sm_step() is running.
743 * Freeing will be completed in the end of wpa_sm_step(). */
744 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
745 "machine deinit for " MACSTR, MAC2STR(sm->addr));
746 sm->pending_deinit = 1;
747 } else
748 wpa_free_sta_sm(sm);
749}
750
751
752static void wpa_request_new_ptk(struct wpa_state_machine *sm)
753{
754 if (sm == NULL)
755 return;
756
757 sm->PTKRequest = TRUE;
758 sm->PTK_valid = 0;
759}
760
761
68921e24 762static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 763 const u8 *replay_counter)
764{
765 int i;
766 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 767 if (!ctr[i].valid)
22a299ee 768 break;
68921e24 769 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 770 WPA_REPLAY_COUNTER_LEN) == 0)
771 return 1;
772 }
773 return 0;
774}
775
776
68921e24
JM		 777static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
778 const u8 *replay_counter)
779{
780 int i;
781 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
782 if (ctr[i].valid &&
783 (replay_counter == NULL ||
784 os_memcmp(replay_counter, ctr[i].counter,
785 WPA_REPLAY_COUNTER_LEN) == 0))
786 ctr[i].valid = FALSE;
787 }
788}
789
790
4ec1fd8e 791#ifdef CONFIG_IEEE80211R_AP
0f857f43
JM		 792static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
793 struct wpa_state_machine *sm,
794 struct wpa_eapol_ie_parse *kde)
795{
796 struct wpa_ie_data ie;
797 struct rsn_mdie *mdie;
798
799 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
800 ie.num_pmkid != 1 || ie.pmkid == NULL) {
801 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
802 "FT 4-way handshake message 2/4");
803 return -1;
804 }
805
806 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
807 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
808 sm->sup_pmk_r1_name, PMKID_LEN);
809
810 if (!kde->mdie || !kde->ftie) {
811 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
812 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
813 return -1;
814 }
815
816 mdie = (struct rsn_mdie *) (kde->mdie + 2);
817 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
818 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
819 MOBILITY_DOMAIN_ID_LEN) != 0) {
820 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
821 return -1;
822 }
823
824 if (sm->assoc_resp_ftie &&
825 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
826 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
827 2 + sm->assoc_resp_ftie[1]) != 0)) {
828 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
829 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
830 kde->ftie, kde->ftie_len);
831 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
832 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
833 return -1;
834 }
835
836 return 0;
837}
4ec1fd8e 838#endif /* CONFIG_IEEE80211R_AP */
0f857f43
JM		 839
840
c772d054
JM		 841static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
842 struct wpa_state_machine *sm, int group)
ec027805
JM		 843{
844 /* Supplicant reported a Michael MIC error */
845 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
846 "received EAPOL-Key Error Request "
847 "(STA detected Michael MIC failure (group=%d))",
848 group);
fbc72d32
JM		 849
850 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
851 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
852 "ignore Michael MIC failure report since "
853 "group cipher is not TKIP");
854 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
855 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
856 "ignore Michael MIC failure report since "
857 "pairwise cipher is not TKIP");
858 } else {
c772d054
JM		 859 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
860 return 1; /* STA entry was removed */
fbc72d32
JM		 861 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
862 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
863 }
ec027805
JM		 864
865 /*
866 * Error report is not a request for a new key handshake, but since
867 * Authenticator may do it, let's change the keys now anyway.
868 */
869 wpa_request_new_ptk(sm);
c772d054 870 return 0;
ec027805
JM		 871}
872
873
f23c5b17
JM		 874static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
875 size_t data_len)
876{
877 struct wpa_ptk PTK;
878 int ok = 0;
879 const u8 *pmk = NULL;
7a12edd1 880 size_t pmk_len;
dbfa691d 881 int vlan_id = 0;
f23c5b17 882
b729fd8d 883 os_memset(&PTK, 0, sizeof(PTK));
f23c5b17 884 for (;;) {
e61fea6b
JM		 885 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
886 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
f23c5b17 887 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
dbfa691d
JM		 888 sm->p2p_dev_addr, pmk, &pmk_len,
889 &vlan_id);
f23c5b17
JM		 890 if (pmk == NULL)
891 break;
f9854c18
MK		 892#ifdef CONFIG_IEEE80211R_AP
893 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
894 os_memcpy(sm->xxkey, pmk, pmk_len);
895 sm->xxkey_len = pmk_len;
896 }
897#endif /* CONFIG_IEEE80211R_AP */
207976f0 898 } else {
f23c5b17 899 pmk = sm->PMK;
207976f0
JM		 900 pmk_len = sm->pmk_len;
901 }
f23c5b17 902
364c064a
JM		 903 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
904 break;
f23c5b17 905
567da5bb
JM		 906 if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
907 data, data_len) == 0) {
08dc8efd
JM		 908 if (sm->PMK != pmk) {
909 os_memcpy(sm->PMK, pmk, pmk_len);
910 sm->pmk_len = pmk_len;
911 }
f23c5b17
JM		 912 ok = 1;
913 break;
914 }
915
f5e0a332
JM		 916 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
917 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
f23c5b17
JM		 918 break;
919 }
920
921 if (!ok) {
922 wpa_printf(MSG_DEBUG,
923 "WPA: Earlier SNonce did not result in matching MIC");
924 return -1;
925 }
926
927 wpa_printf(MSG_DEBUG,
928 "WPA: Earlier SNonce resulted in matching MIC");
929 sm->alt_snonce_valid = 0;
dbfa691d
JM		 930
931 if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
932 wpa_auth_update_vlan(sm->wpa_auth, sm->addr, vlan_id) < 0)
933 return -1;
934
f23c5b17
JM		 935 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
936 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
937 sm->PTK_valid = TRUE;
938
939 return 0;
940}
941
942
6fc6879b
JM		 943void wpa_receive(struct wpa_authenticator *wpa_auth,
944 struct wpa_state_machine *sm,
945 u8 *data, size_t data_len)
946{
947 struct ieee802_1x_hdr *hdr;
948 struct wpa_eapol_key *key;
949 u16 key_info, key_data_length;
a0bf1b68 950 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg;
6fc6879b
JM		 951 char *msgtxt;
952 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 953 const u8 *key_data;
954 size_t keyhdrlen, mic_len;
6d014ffc 955 u8 *mic;
6fc6879b
JM		 956
957 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
958 return;
dc5bad48 959 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 960
567da5bb 961 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 962 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 963
dc5bad48
JM		 964 if (data_len < sizeof(*hdr) + keyhdrlen) {
965 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 966 return;
dc5bad48 967 }
6fc6879b
JM		 968
969 hdr = (struct ieee802_1x_hdr *) data;
970 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 971 mic = (u8 *) (key + 1);
6fc6879b 972 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 973 key_data = mic + mic_len + 2;
974 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 975 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 976 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
977 MAC2STR(sm->addr), key_info, key->type,
978 (unsigned int) mic_len, key_data_length);
979 wpa_hexdump(MSG_MSGDUMP,
980 "WPA: EAPOL-Key header (ending before Key MIC)",
981 key, sizeof(*key));
982 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
983 mic, mic_len);
5e3b5197 984 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 985 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
986 "key_data overflow (%d > %lu)",
987 key_data_length,
988 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 989 keyhdrlen));
6fc6879b
JM		 990 return;
991 }
992
f8e96eb6 993 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 994 if (key->type == EAPOL_KEY_TYPE_WPA) {
995 /*
996 * Some deployed station implementations seem to send
997 * msg 4/4 with incorrect type value in WPA2 mode.
998 */
999 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
1000 "with unexpected WPA type in RSN mode");
1001 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 1002 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1003 "unexpected type %d in RSN mode",
1004 key->type);
1005 return;
1006 }
1007 } else {
1008 if (key->type != EAPOL_KEY_TYPE_WPA) {
1009 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1010 "unexpected type %d in WPA mode",
1011 key->type);
1012 return;
1013 }
1014 }
1015
bc8318ac
JM		 1016 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
1017 WPA_NONCE_LEN);
1018 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
1019 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1020
6fc6879b
JM		 1021 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
1022 * are set */
1023
a0bf1b68
JM		 1024 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1025 wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message");
1026 return;
1027 }
1028
1029 if (key_info & WPA_KEY_INFO_REQUEST) {
6fc6879b
JM		 1030 msg = REQUEST;
1031 msgtxt = "Request";
1032 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1033 msg = GROUP_2;
1034 msgtxt = "2/2 Group";
3b5b7aa8
JM		 1035 } else if (key_data_length == 0 ||
1036 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
1037 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 1038 msg = PAIRWISE_4;
1039 msgtxt = "4/4 Pairwise";
1040 } else {
1041 msg = PAIRWISE_2;
1042 msgtxt = "2/4 Pairwise";
1043 }
1044
6fc6879b
JM		 1045 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1046 msg == GROUP_2) {
1047 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 1048 if (sm->pairwise == WPA_CIPHER_CCMP ||
1049 sm->pairwise == WPA_CIPHER_GCMP) {
4bc801ab
JM		 1050 if (wpa_use_cmac(sm->wpa_key_mgmt) &&
1051 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1052 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1053 wpa_auth_logger(wpa_auth, sm->addr,
1054 LOGGER_WARNING,
1055 "advertised support for "
1056 "AES-128-CMAC, but did not "
1057 "use it");
1058 return;
1059 }
1060
4bc801ab
JM		 1061 if (!wpa_use_cmac(sm->wpa_key_mgmt) &&
1062 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1063 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1064 wpa_auth_logger(wpa_auth, sm->addr,
1065 LOGGER_WARNING,
1066 "did not use HMAC-SHA1-AES "
eb7719ff 1067 "with CCMP/GCMP");
6fc6879b
JM		 1068 return;
1069 }
1070 }
929a2ea5 1071
4bc801ab 1072 if (wpa_use_akm_defined(sm->wpa_key_mgmt) &&
929a2ea5
JM		 1073 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1074 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1075 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1076 return;
1077 }
6fc6879b
JM		 1078 }
1079
1080 if (key_info & WPA_KEY_INFO_REQUEST) {
1081 if (sm->req_replay_counter_used &&
1082 os_memcmp(key->replay_counter, sm->req_replay_counter,
1083 WPA_REPLAY_COUNTER_LEN) <= 0) {
1084 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1085 "received EAPOL-Key request with "
1086 "replayed counter");
1087 return;
1088 }
1089 }
1090
1091 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1092 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1093 int i;
68921e24
JM		 1094
1095 if (msg == PAIRWISE_2 &&
1096 wpa_replay_counter_valid(sm->prev_key_replay,
1097 key->replay_counter) &&
1098 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1099 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1100 {
1101 /*
1102 * Some supplicant implementations (e.g., Windows XP
1103 * WZC) update SNonce for each EAPOL-Key 2/4. This
1104 * breaks the workaround on accepting any of the
1105 * pending requests, so allow the SNonce to be updated
1106 * even if we have already sent out EAPOL-Key 3/4.
1107 */
1108 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1109 "Process SNonce update from STA "
1110 "based on retransmitted EAPOL-Key "
1111 "1/4");
1112 sm->update_snonce = 1;
f23c5b17
JM		 1113 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1114 sm->alt_snonce_valid = TRUE;
1115 os_memcpy(sm->alt_replay_counter,
1116 sm->key_replay[0].counter,
1117 WPA_REPLAY_COUNTER_LEN);
1118 goto continue_processing;
1119 }
1120
1121 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1122 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1123 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1124 WPA_REPLAY_COUNTER_LEN) == 0) {
1125 /*
1126 * Supplicant may still be using the old SNonce since
1127 * there was two EAPOL-Key 2/4 messages and they had
1128 * different SNonce values.
1129 */
1130 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1131 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1132 goto continue_processing;
1133 }
1134
1135 if (msg == PAIRWISE_2 &&
1136 wpa_replay_counter_valid(sm->prev_key_replay,
1137 key->replay_counter) &&
1138 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1139 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1140 "ignore retransmitted EAPOL-Key %s - "
1141 "SNonce did not change", msgtxt);
1142 } else {
1143 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1144 "received EAPOL-Key %s with "
1145 "unexpected replay counter", msgtxt);
1146 }
22a299ee
JM		 1147 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1148 if (!sm->key_replay[i].valid)
1149 break;
1150 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1151 sm->key_replay[i].counter,
1152 WPA_REPLAY_COUNTER_LEN);
1153 }
6fc6879b
JM		 1154 wpa_hexdump(MSG_DEBUG, "received replay counter",
1155 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1156 return;
1157 }
1158
68921e24 1159continue_processing:
3b5b7aa8
JM		 1160#ifdef CONFIG_FILS
1161 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1162 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1163 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1164 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1165 return;
1166 }
1167#endif /* CONFIG_FILS */
1168
6fc6879b
JM		 1169 switch (msg) {
1170 case PAIRWISE_2:
1171 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1172 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1173 (!sm->update_snonce ||
1174 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1175 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1176 "received EAPOL-Key msg 2/4 in "
1177 "invalid state (%d) - dropped",
1178 sm->wpa_ptk_state);
1179 return;
1180 }
bbb921da 1181 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1182 if (sm->group->reject_4way_hs_for_entropy) {
1183 /*
1184 * The system did not have enough entropy to generate
1185 * strong random numbers. Reject the first 4-way
1186 * handshake(s) and collect some entropy based on the
1187 * information from it. Once enough entropy is
1188 * available, the next atempt will trigger GMK/Key
1189 * Counter update and the station will be allowed to
1190 * continue.
1191 */
1192 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1193 "collect more entropy for random number "
1194 "generation");
08704cd8 1195 random_mark_pool_ready();
567da5bb
JM		 1196 wpa_sta_disconnect(wpa_auth, sm->addr,
1197 WLAN_REASON_PREV_AUTH_NOT_VALID);
08704cd8
JM		 1198 return;
1199 }
6fc6879b
JM		 1200 break;
1201 case PAIRWISE_4:
1202 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1203 !sm->PTK_valid) {
1204 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1205 "received EAPOL-Key msg 4/4 in "
1206 "invalid state (%d) - dropped",
1207 sm->wpa_ptk_state);
1208 return;
1209 }
1210 break;
1211 case GROUP_2:
1212 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1213 || !sm->PTK_valid) {
1214 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1215 "received EAPOL-Key msg 2/2 in "
1216 "invalid state (%d) - dropped",
1217 sm->wpa_ptk_group_state);
1218 return;
1219 }
1220 break;
6fc6879b
JM		 1221 case REQUEST:
1222 break;
1223 }
1224
1225 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1226 "received EAPOL-Key frame (%s)", msgtxt);
1227
1228 if (key_info & WPA_KEY_INFO_ACK) {
1229 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1230 "received invalid EAPOL-Key: Key Ack set");
1231 return;
1232 }
1233
b9866483
JM		 1234 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1235 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1236 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1237 "received invalid EAPOL-Key: Key MIC not set");
1238 return;
1239 }
1240
b9866483
JM		 1241#ifdef CONFIG_FILS
1242 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1243 (key_info & WPA_KEY_INFO_MIC)) {
1244 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1245 "received invalid EAPOL-Key: Key MIC set");
1246 return;
1247 }
1248#endif /* CONFIG_FILS */
1249
6fc6879b 1250 sm->MICVerified = FALSE;
68921e24 1251 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8 1252 if (mic_len &&
567da5bb
JM		 1253 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1254 data, data_len) &&
f23c5b17
JM		 1255 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1256 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 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 */
6fc6879b
JM		 1264 return;
1265 }
75c8563e
JM		 1266#ifdef CONFIG_FILS
1267 if (!mic_len &&
1268 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1269 &key_data_length) < 0) {
1270 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1271 "received EAPOL-Key with invalid MIC");
525923b1
JM		 1272#ifdef TEST_FUZZ
1273 wpa_printf(MSG_INFO,
1274 "TEST: Ignore Key MIC failure for fuzz testing");
1275 goto continue_fuzz;
1276#endif /* TEST_FUZZ */
75c8563e
JM		 1277 return;
1278 }
1279#endif /* CONFIG_FILS */
525923b1
JM		 1280#ifdef TEST_FUZZ
1281 continue_fuzz:
1282#endif /* TEST_FUZZ */
6fc6879b
JM		 1283 sm->MICVerified = TRUE;
1284 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1285 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1286 }
1287
1288 if (key_info & WPA_KEY_INFO_REQUEST) {
1289 if (sm->MICVerified) {
1290 sm->req_replay_counter_used = 1;
1291 os_memcpy(sm->req_replay_counter, key->replay_counter,
1292 WPA_REPLAY_COUNTER_LEN);
1293 } else {
1294 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1295 "received EAPOL-Key request with "
1296 "invalid MIC");
1297 return;
1298 }
1299
1300 /*
1301 * TODO: should decrypt key data field if encryption was used;
1302 * even though MAC address KDE is not normally encrypted,
1303 * supplicant is allowed to encrypt it.
1304 */
a0bf1b68 1305 if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1306 if (wpa_receive_error_report(
1307 wpa_auth, sm,
1308 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1309 return; /* STA entry was removed */
6fc6879b
JM		 1310 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1311 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1312 "received EAPOL-Key Request for new "
1313 "4-Way Handshake");
1314 wpa_request_new_ptk(sm);
6fc6879b 1315 } else if (key_data_length > 0 &&
5e3b5197
JM		 1316 wpa_parse_kde_ies(key_data, key_data_length,
1317 &kde) == 0 &&
6fc6879b
JM		 1318 kde.mac_addr) {
1319 } else {
1320 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1321 "received EAPOL-Key Request for GTK "
1322 "rekeying");
6fc6879b
JM		 1323 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1324 wpa_rekey_gtk(wpa_auth, NULL);
1325 }
1326 } else {
68921e24
JM		 1327 /* Do not allow the same key replay counter to be reused. */
1328 wpa_replay_counter_mark_invalid(sm->key_replay,
1329 key->replay_counter);
1330
1331 if (msg == PAIRWISE_2) {
1332 /*
1333 * Maintain a copy of the pending EAPOL-Key frames in
1334 * case the EAPOL-Key frame was retransmitted. This is
1335 * needed to allow EAPOL-Key msg 2/4 reply to another
1336 * pending msg 1/4 to update the SNonce to work around
1337 * unexpected supplicant behavior.
1338 */
1339 os_memcpy(sm->prev_key_replay, sm->key_replay,
1340 sizeof(sm->key_replay));
1341 } else {
1342 os_memset(sm->prev_key_replay, 0,
1343 sizeof(sm->prev_key_replay));
1344 }
1345
1346 /*
1347 * Make sure old valid counters are not accepted anymore and
1348 * do not get copied again.
1349 */
1350 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1351 }
1352
6fc6879b 1353 os_free(sm->last_rx_eapol_key);
a1f11e34 1354 sm->last_rx_eapol_key = os_memdup(data, data_len);
6fc6879b
JM		 1355 if (sm->last_rx_eapol_key == NULL)
1356 return;
6fc6879b
JM		 1357 sm->last_rx_eapol_key_len = data_len;
1358
0d442aff 1359 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1360 sm->EAPOLKeyReceived = TRUE;
1361 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1362 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1363 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1364 wpa_sm_step(sm);
1365}
1366
1367
3c7302c2
JM		 1368static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1369 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1370{
c6eb3e34 1371 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN];
5cb9d5c3 1372 u8 *pos;
3c7302c2 1373 int ret = 0;
6fc6879b 1374
5cb9d5c3
JM		 1375 /* GTK = PRF-X(GMK, "Group key expansion",
1376 * AA || GNonce || Time || random data)
1377 * The example described in the IEEE 802.11 standard uses only AA and
1378 * GNonce as inputs here. Add some more entropy since this derivation
1379 * is done only at the Authenticator and as such, does not need to be
1380 * exactly same.
1381 */
c6eb3e34 1382 os_memset(data, 0, sizeof(data));
6fc6879b
JM		 1383 os_memcpy(data, addr, ETH_ALEN);
1384 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1385 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1386 wpa_get_ntp_timestamp(pos);
525923b1
JM		 1387#ifdef TEST_FUZZ
1388 os_memset(pos, 0xef, 8);
1389#endif /* TEST_FUZZ */
5cb9d5c3 1390 pos += 8;
c6eb3e34 1391 if (random_get_bytes(pos, gtk_len) < 0)
3c7302c2 1392 ret = -1;
6fc6879b 1393
c6eb3e34
JM		 1394#ifdef CONFIG_SHA384
1395 if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1396 gtk, gtk_len) < 0)
3c7302c2 1397 ret = -1;
c6eb3e34
JM		 1398#else /* CONFIG_SHA384 */
1399#ifdef CONFIG_SHA256
1400 if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1401 gtk, gtk_len) < 0)
1402 ret = -1;
1403#else /* CONFIG_SHA256 */
1404 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1405 gtk, gtk_len) < 0)
1406 ret = -1;
1407#endif /* CONFIG_SHA256 */
1408#endif /* CONFIG_SHA384 */
3c7302c2
JM		 1409
1410 return ret;
6fc6879b
JM		 1411}
1412
1413
1414static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1415{
1416 struct wpa_authenticator *wpa_auth = eloop_ctx;
1417 struct wpa_state_machine *sm = timeout_ctx;
1418
e4bf4db9 1419 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1420 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1421 sm->TimeoutEvt = TRUE;
1422 wpa_sm_step(sm);
1423}
1424
1425
1426void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1427 struct wpa_state_machine *sm, int key_info,
1428 const u8 *key_rsc, const u8 *nonce,
1429 const u8 *kde, size_t kde_len,
1430 int keyidx, int encr, int force_version)
1431{
1432 struct ieee802_1x_hdr *hdr;
1433 struct wpa_eapol_key *key;
5e3b5197 1434 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1435 int alg;
1436 int key_data_len, pad_len = 0;
1437 u8 *buf, *pos;
1438 int version, pairwise;
22a299ee 1439 int i;
6d014ffc 1440 u8 *key_mic, *key_data;
6fc6879b 1441
567da5bb 1442 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 1443 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1444
1445 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1446
1447 if (force_version)
1448 version = force_version;
4bc801ab 1449 else if (wpa_use_akm_defined(sm->wpa_key_mgmt))
a14896e8 1450 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
4bc801ab 1451 else if (wpa_use_cmac(sm->wpa_key_mgmt))
6fc6879b 1452 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1453 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1454 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1455 else
1456 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1457
8543ed8a 1458 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1459
1460 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1461 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1462 "encr=%d)",
1463 version,
1464 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1465 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1466 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1467 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1468 pairwise, (unsigned long) kde_len, keyidx, encr);
1469
1470 key_data_len = kde_len;
1471
1472 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1473 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1474 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1475 pad_len = key_data_len % 8;
1476 if (pad_len)
1477 pad_len = 8 - pad_len;
1478 key_data_len += pad_len + 8;
1479 }
1480
1481 len += key_data_len;
b729fd8d
JM		 1482 if (!mic_len && encr)
1483 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1484
1485 hdr = os_zalloc(len);
1486 if (hdr == NULL)
1487 return;
1488 hdr->version = wpa_auth->conf.eapol_version;
1489 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1490 hdr->length = host_to_be16(len - sizeof(*hdr));
1491 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1492 key_mic = (u8 *) (key + 1);
5e3b5197 1493 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1494
1495 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1496 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1497 key_info |= version;
1498 if (encr && sm->wpa == WPA_VERSION_WPA2)
1499 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1500 if (sm->wpa != WPA_VERSION_WPA2)
1501 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1502 WPA_PUT_BE16(key->key_info, key_info);
1503
1504 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
a0bf1b68 1505 if (sm->wpa == WPA_VERSION_WPA2 && !pairwise)
6fc6879b 1506 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1507 else
1508 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b 1509
22a299ee
JM		 1510 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1511 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1512 os_memcpy(sm->key_replay[i].counter,
1513 sm->key_replay[i - 1].counter,
1514 WPA_REPLAY_COUNTER_LEN);
1515 }
1516 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1517 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1518 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1519 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1520 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1521 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1522
1523 if (nonce)
1524 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1525
1526 if (key_rsc)
1527 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1528
1529 if (kde && !encr) {
5e3b5197 1530 os_memcpy(key_data, kde, kde_len);
6d014ffc 1531 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d 1532#ifdef CONFIG_FILS
c05f96a3 1533 } else if (!mic_len && kde) {
b729fd8d
JM		 1534 const u8 *aad[1];
1535 size_t aad_len[1];
1536
1537 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1538 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1539 kde, kde_len);
1540
1541 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1542 sm->PTK.kek, sm->PTK.kek_len);
1543 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1544 * to Key Data (exclusive). */
1545 aad[0] = (u8 *) hdr;
1546 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1547 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1548 1, aad, aad_len, key_mic + 2) < 0) {
1549 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1550 return;
1551 }
1552
1553 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1554 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1555#endif /* CONFIG_FILS */
6fc6879b
JM		 1556 } else if (encr && kde) {
1557 buf = os_zalloc(key_data_len);
1558 if (buf == NULL) {
1559 os_free(hdr);
1560 return;
1561 }
1562 pos = buf;
1563 os_memcpy(pos, kde, kde_len);
1564 pos += kde_len;
1565
1566 if (pad_len)
1567 *pos++ = 0xdd;
1568
1569 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1570 buf, key_data_len);
1571 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1572 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b 1573 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
ef9627cb
JM		 1574 wpa_printf(MSG_DEBUG,
1575 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1576 (unsigned int) sm->PTK.kek_len);
98cd3d1c 1577 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1578 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1579 os_free(hdr);
1580 os_free(buf);
1581 return;
1582 }
6d014ffc 1583 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1584#ifndef CONFIG_NO_RC4
98cd3d1c 1585 } else if (sm->PTK.kek_len == 16) {
6fc6879b 1586 u8 ek[32];
ef9627cb
JM		 1587
1588 wpa_printf(MSG_DEBUG,
1589 "WPA: Encrypt Key Data using RC4");
6fc6879b
JM		 1590 os_memcpy(key->key_iv,
1591 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1592 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1593 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1594 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1595 os_memcpy(key_data, buf, key_data_len);
1596 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1597 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1598#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1599 } else {
1600 os_free(hdr);
1601 os_free(buf);
1602 return;
6fc6879b
JM		 1603 }
1604 os_free(buf);
1605 }
1606
1607 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1608 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1609 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1610 "PTK not valid when sending EAPOL-Key "
1611 "frame");
1612 os_free(hdr);
1613 return;
1614 }
5e3b5197 1615
beae255a
JM		 1616 if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1617 sm->wpa_key_mgmt, version,
1618 (u8 *) hdr, len, key_mic) < 0) {
1619 os_free(hdr);
1620 return;
1621 }
7af092a0
JB		 1622#ifdef CONFIG_TESTING_OPTIONS
1623 if (!pairwise &&
06df2aa6 1624 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1625 drand48() <
1626 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1627 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1628 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1629 key_mic[0]++;
7af092a0
JB		 1630 }
1631#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1632 }
1633
1634 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1635 1);
1636 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1637 sm->pairwise_set);
1638 os_free(hdr);
1639}
1640
1641
1642static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1643 struct wpa_state_machine *sm, int key_info,
1644 const u8 *key_rsc, const u8 *nonce,
1645 const u8 *kde, size_t kde_len,
1646 int keyidx, int encr)
1647{
1648 int timeout_ms;
1649 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1650 u32 ctr;
6fc6879b
JM		 1651
1652 if (sm == NULL)
1653 return;
1654
1655 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1656 keyidx, encr, 0);
1657
bae61562 1658 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1659 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1660 timeout_ms = pairwise ? eapol_key_timeout_first :
1661 eapol_key_timeout_first_group;
bae61562
JM		 1662 else
1663 timeout_ms = eapol_key_timeout_subseq;
6f234c1e
JM		 1664 if (wpa_auth->conf.wpa_disable_eapol_key_retries &&
1665 (!pairwise || (key_info & WPA_KEY_INFO_MIC)))
1666 timeout_ms = eapol_key_timeout_no_retrans;
e4bf4db9
JM		 1667 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1668 sm->pending_1_of_4_timeout = 1;
525923b1
JM		 1669#ifdef TEST_FUZZ
1670 timeout_ms = 1;
1671#endif /* TEST_FUZZ */
e4bf4db9 1672 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1673 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1674 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1675 wpa_send_eapol_timeout, wpa_auth, sm);
1676}
1677
1678
567da5bb
JM		 1679static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1680 u8 *data, size_t data_len)
6fc6879b
JM		 1681{
1682 struct ieee802_1x_hdr *hdr;
1683 struct wpa_eapol_key *key;
1684 u16 key_info;
1685 int ret = 0;
6d014ffc 1686 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
567da5bb 1687 size_t mic_len = wpa_mic_len(akmp, pmk_len);
6fc6879b
JM		 1688
1689 if (data_len < sizeof(*hdr) + sizeof(*key))
1690 return -1;
1691
1692 hdr = (struct ieee802_1x_hdr *) data;
1693 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1694 mic_pos = (u8 *) (key + 1);
6fc6879b 1695 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1696 os_memcpy(mic, mic_pos, mic_len);
1697 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1698 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1699 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1700 data, data_len, mic_pos) ||
1701 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1702 ret = -1;
6d014ffc 1703 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1704 return ret;
1705}
1706
1707
1708void wpa_remove_ptk(struct wpa_state_machine *sm)
1709{
1710 sm->PTK_valid = FALSE;
1711 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1712 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1713 0))
1714 wpa_printf(MSG_DEBUG,
1715 "RSN: PTK removal from the driver failed");
6fc6879b 1716 sm->pairwise_set = FALSE;
581a8cde 1717 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1718}
1719
1720
bb119228 1721int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1722{
5d22a1d5
JM		 1723 int remove_ptk = 1;
1724
6fc6879b 1725 if (sm == NULL)
6f9b5d16 1726 return -1;
6fc6879b
JM		 1727
1728 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1729 "event %d notification", event);
1730
1731 switch (event) {
1732 case WPA_AUTH:
c50d94f1
BC		 1733#ifdef CONFIG_MESH
1734 /* PTKs are derived through AMPE */
1735 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1736 /* not mesh */
1737 break;
1738 }
1739 return 0;
1740#endif /* CONFIG_MESH */
6fc6879b
JM		 1741 case WPA_ASSOC:
1742 break;
1743 case WPA_DEAUTH:
1744 case WPA_DISASSOC:
1745 sm->DeauthenticationRequest = TRUE;
09ab81b9
JM		 1746#ifdef CONFIG_IEEE80211R_AP
1747 os_memset(sm->PMK, 0, sizeof(sm->PMK));
1748 sm->pmk_len = 0;
1749 os_memset(sm->xxkey, 0, sizeof(sm->xxkey));
1750 sm->xxkey_len = 0;
8a576f5e
JM		 1751 os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1));
1752 sm->pmk_r1_len = 0;
09ab81b9 1753#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1754 break;
1755 case WPA_REAUTH:
1756 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1757 if (!sm->started) {
1758 /*
1759 * When using WPS, we may end up here if the STA
1760 * manages to re-associate without the previous STA
1761 * entry getting removed. Consequently, we need to make
1762 * sure that the WPA state machines gets initialized
1763 * properly at this point.
1764 */
1765 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1766 "started - initialize now");
1767 sm->started = 1;
1768 sm->Init = TRUE;
1769 if (wpa_sm_step(sm) == 1)
1770 return 1; /* should not really happen */
1771 sm->Init = FALSE;
1772 sm->AuthenticationRequest = TRUE;
1773 break;
1774 }
9663596f
JM		 1775 if (sm->GUpdateStationKeys) {
1776 /*
1777 * Reauthentication cancels the pending group key
1778 * update for this STA.
1779 */
1780 sm->group->GKeyDoneStations--;
1781 sm->GUpdateStationKeys = FALSE;
1782 sm->PtkGroupInit = TRUE;
1783 }
6fc6879b
JM		 1784 sm->ReAuthenticationRequest = TRUE;
1785 break;
1786 case WPA_ASSOC_FT:
4ec1fd8e 1787#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1788 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1789 "after association");
1790 wpa_ft_install_ptk(sm);
1791
6fc6879b
JM		 1792 /* Using FT protocol, not WPA auth state machine */
1793 sm->ft_completed = 1;
d178ab0d 1794 wpa_auth_set_ptk_rekey_timer(sm);
6f9b5d16 1795 return 0;
4ec1fd8e 1796#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1797 break;
4ec1fd8e 1798#endif /* CONFIG_IEEE80211R_AP */
957bff83
JM		 1799 case WPA_ASSOC_FILS:
1800#ifdef CONFIG_FILS
1801 wpa_printf(MSG_DEBUG,
1802 "FILS: TK configuration after association");
1803 fils_set_tk(sm);
1804 sm->fils_completed = 1;
1805 return 0;
1806#else /* CONFIG_FILS */
1807 break;
1808#endif /* CONFIG_FILS */
0e3bd7ac
MV		 1809 case WPA_DRV_STA_REMOVED:
1810 sm->tk_already_set = FALSE;
1811 return 0;
6fc6879b
JM		 1812 }
1813
4ec1fd8e 1814#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1815 sm->ft_completed = 0;
4ec1fd8e 1816#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1817
5d22a1d5
JM		 1818#ifdef CONFIG_IEEE80211W
1819 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1820 remove_ptk = 0;
1821#endif /* CONFIG_IEEE80211W */
78815f3d 1822#ifdef CONFIG_FILS
da24c5aa
JM		 1823 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1824 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1825 remove_ptk = 0;
1826#endif /* CONFIG_FILS */
6fc6879b 1827
5d22a1d5
JM		 1828 if (remove_ptk) {
1829 sm->PTK_valid = FALSE;
1830 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1831
1832 if (event != WPA_REAUTH_EAPOL)
1833 wpa_remove_ptk(sm);
1834 }
6fc6879b 1835
43f49c37
JM		 1836 if (sm->in_step_loop) {
1837 /*
1838 * wpa_sm_step() is already running - avoid recursive call to
1839 * it by making the existing loop process the new update.
1840 */
1841 sm->changed = TRUE;
1842 return 0;
1843 }
6f9b5d16 1844 return wpa_sm_step(sm);
6fc6879b
JM		 1845}
1846
1847
6fc6879b
JM		 1848SM_STATE(WPA_PTK, INITIALIZE)
1849{
1850 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1851 if (sm->Init) {
1852 /* Init flag is not cleared here, so avoid busy
1853 * loop by claiming nothing changed. */
1854 sm->changed = FALSE;
1855 }
1856
1857 sm->keycount = 0;
1858 if (sm->GUpdateStationKeys)
1859 sm->group->GKeyDoneStations--;
1860 sm->GUpdateStationKeys = FALSE;
1861 if (sm->wpa == WPA_VERSION_WPA)
1862 sm->PInitAKeys = FALSE;
1863 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1864 * Local AA > Remote AA)) */) {
1865 sm->Pair = TRUE;
1866 }
1867 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1868 wpa_remove_ptk(sm);
1869 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1870 sm->TimeoutCtr = 0;
a1ea1b45 1871 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 1872 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 1873 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 1874 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1875 WPA_EAPOL_authorized, 0);
1876 }
1877}
1878
1879
1880SM_STATE(WPA_PTK, DISCONNECT)
1881{
567da5bb
JM		 1882 u16 reason = sm->disconnect_reason;
1883
6fc6879b
JM		 1884 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1885 sm->Disconnect = FALSE;
567da5bb
JM		 1886 sm->disconnect_reason = 0;
1887 if (!reason)
1888 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1889 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
6fc6879b
JM		 1890}
1891
1892
1893SM_STATE(WPA_PTK, DISCONNECTED)
1894{
1895 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1896 sm->DeauthenticationRequest = FALSE;
1897}
1898
1899
1900SM_STATE(WPA_PTK, AUTHENTICATION)
1901{
1902 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1903 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1904 sm->PTK_valid = FALSE;
1905 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1906 1);
1907 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1908 sm->AuthenticationRequest = FALSE;
1909}
1910
1911
40d00d2b
NC		 1912static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1913 struct wpa_group *group)
1bdb7ab3 1914{
40d00d2b
NC		 1915 if (group->first_sta_seen)
1916 return;
1bdb7ab3
JM		 1917 /*
1918 * System has run bit further than at the time hostapd was started
1919 * potentially very early during boot up. This provides better chances
1920 * of collecting more randomness on embedded systems. Re-initialize the
1921 * GMK and Counter here to improve their strength if there was not
1922 * enough entropy available immediately after system startup.
1923 */
1924 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1925 "station");
08704cd8
JM		 1926 if (random_pool_ready() != 1) {
1927 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1928 "to proceed - reject first 4-way handshake");
1929 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1930 } else {
1931 group->first_sta_seen = TRUE;
1932 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1933 }
40d00d2b 1934
aac1efec
JM		 1935 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1936 wpa_gtk_update(wpa_auth, group) < 0 ||
1937 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1938 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1939 group->first_sta_seen = FALSE;
1940 group->reject_4way_hs_for_entropy = TRUE;
1941 }
1bdb7ab3
JM		 1942}
1943
1944
6fc6879b
JM		 1945SM_STATE(WPA_PTK, AUTHENTICATION2)
1946{
1947 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1948
40d00d2b 1949 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1950 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1951
3825a19b
JM		 1952 /*
1953 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1954 * ambiguous. The Authenticator state machine uses a counter that is
1955 * incremented by one for each 4-way handshake. However, the security
1956 * analysis of 4-way handshake points out that unpredictable nonces
1957 * help in preventing precomputation attacks. Instead of the state
1958 * machine definition, use an unpredictable nonce value here to provide
1959 * stronger protection against potential precomputation attacks.
1960 */
1961 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1962 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1963 "ANonce.");
65a32cdb 1964 sm->Disconnect = TRUE;
3825a19b
JM		 1965 return;
1966 }
bc8318ac
JM		 1967 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1968 WPA_NONCE_LEN);
6fc6879b
JM		 1969 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1970 * logical place than INITIALIZE since AUTHENTICATION2 can be
1971 * re-entered on ReAuthenticationRequest without going through
1972 * INITIALIZE. */
1973 sm->TimeoutCtr = 0;
1974}
1975
1976
0adc9b28
JM		 1977static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1978{
1979 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1980 wpa_printf(MSG_ERROR,
1981 "WPA: Failed to get random data for ANonce");
1982 sm->Disconnect = TRUE;
1983 return -1;
1984 }
1985 wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1986 WPA_NONCE_LEN);
1987 sm->TimeoutCtr = 0;
1988 return 0;
1989}
1990
1991
6fc6879b
JM		 1992SM_STATE(WPA_PTK, INITPMK)
1993{
1994 u8 msk[2 * PMK_LEN];
1995 size_t len = 2 * PMK_LEN;
1996
1997 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1998#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1999 sm->xxkey_len = 0;
4ec1fd8e 2000#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2001 if (sm->pmksa) {
2002 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 2003 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2004 sm->pmk_len = sm->pmksa->pmk_len;
567da5bb
JM		 2005#ifdef CONFIG_DPP
2006 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
2007 wpa_printf(MSG_DEBUG,
2008 "DPP: No PMKSA cache entry for STA - reject connection");
2009 sm->Disconnect = TRUE;
2010 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
2011 return;
2012#endif /* CONFIG_DPP */
6fc6879b 2013 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 2014 unsigned int pmk_len;
2015
834c5d68 2016 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
207976f0
JM		 2017 pmk_len = PMK_LEN_SUITE_B_192;
2018 else
2019 pmk_len = PMK_LEN;
6fc6879b 2020 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 2021 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
2022 pmk_len);
2023 if (len < pmk_len) {
2024 wpa_printf(MSG_DEBUG,
2025 "WPA: MSK not long enough (%u) to create PMK (%u)",
2026 (unsigned int) len, (unsigned int) pmk_len);
2027 sm->Disconnect = TRUE;
2028 return;
2029 }
2030 os_memcpy(sm->PMK, msk, pmk_len);
2031 sm->pmk_len = pmk_len;
4ec1fd8e 2032#ifdef CONFIG_IEEE80211R_AP
6fc6879b 2033 if (len >= 2 * PMK_LEN) {
9f12271b
JM		 2034 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
2035 os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN);
2036 sm->xxkey_len = SHA384_MAC_LEN;
2037 } else {
2038 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
2039 sm->xxkey_len = PMK_LEN;
2040 }
6fc6879b 2041 }
4ec1fd8e 2042#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2043 } else {
400de9b1 2044 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 2045 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 2046 sm->Disconnect = TRUE;
2047 return;
6fc6879b 2048 }
40aaa64f 2049 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 2050
2051 sm->req_replay_counter_used = 0;
2052 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
2053 * will break reauthentication since EAPOL state machines may not be
2054 * get into AUTHENTICATING state that clears keyRun before WPA state
2055 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
2056 * state and takes PMK from the previously used AAA Key. This will
2057 * eventually fail in 4-Way Handshake because Supplicant uses PMK
2058 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
2059 * be good workaround for this issue. */
2060 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
2061}
2062
2063
2064SM_STATE(WPA_PTK, INITPSK)
2065{
2066 const u8 *psk;
7a12edd1
JM		 2067 size_t psk_len;
2068
6fc6879b 2069 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
7a12edd1 2070 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
dbfa691d 2071 &psk_len, NULL);
6fc6879b 2072 if (psk) {
7a12edd1
JM		 2073 os_memcpy(sm->PMK, psk, psk_len);
2074 sm->pmk_len = psk_len;
4ec1fd8e 2075#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 2076 os_memcpy(sm->xxkey, psk, PMK_LEN);
2077 sm->xxkey_len = PMK_LEN;
4ec1fd8e 2078#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2079 }
e61fea6b
JM		 2080#ifdef CONFIG_SAE
2081 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2082 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2083 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2084 sm->pmk_len = sm->pmksa->pmk_len;
6fe3f0f7 2085#ifdef CONFIG_IEEE80211R_AP
2086 os_memcpy(sm->xxkey, sm->pmksa->pmk, sm->pmksa->pmk_len);
2087 sm->xxkey_len = sm->pmksa->pmk_len;
2088#endif /* CONFIG_IEEE80211R_AP */
e61fea6b
JM		 2089 }
2090#endif /* CONFIG_SAE */
6fc6879b
JM		 2091 sm->req_replay_counter_used = 0;
2092}
2093
2094
2095SM_STATE(WPA_PTK, PTKSTART)
2096{
2097 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2098 size_t pmkid_len = 0;
2099
2100 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2101 sm->PTKRequest = FALSE;
2102 sm->TimeoutEvt = FALSE;
f23c5b17 2103 sm->alt_snonce_valid = FALSE;
bae61562
JM		 2104
2105 sm->TimeoutCtr++;
41f140d3 2106 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2107 /* No point in sending the EAPOL-Key - we will disconnect
2108 * immediately following this. */
2109 return;
2110 }
2111
6fc6879b
JM		 2112 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2113 "sending 1/4 msg of 4-Way Handshake");
2114 /*
c6e1a9a0
JM		 2115 * For infrastructure BSS cases, it is better for the AP not to include
2116 * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate
2117 * offline search for the passphrase/PSK without having to be able to
2118 * capture a 4-way handshake from a STA that has access to the network.
2119 *
2120 * For IBSS cases, addition of PMKID KDE could be considered even with
2121 * WPA2-PSK cases that use multiple PSKs, but only if there is a single
2122 * possible PSK for this STA. However, this should not be done unless
2123 * there is support for using that information on the supplicant side.
2124 * The concern about exposing PMKID unnecessarily in infrastructure BSS
2125 * cases would also apply here, but at least in the IBSS case, this
2126 * would cover a potential real use case.
6fc6879b
JM		 2127 */
2128 if (sm->wpa == WPA_VERSION_WPA2 &&
e61fea6b 2129 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
d90f10fa 2130 (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
e61fea6b 2131 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
a14896e8 2132 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2133 pmkid = buf;
2134 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2135 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2136 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2137 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2138 if (sm->pmksa) {
9d94e4bb
JM		 2139 wpa_hexdump(MSG_DEBUG,
2140 "RSN: Message 1/4 PMKID from PMKSA entry",
2141 sm->pmksa->pmkid, PMKID_LEN);
6fc6879b
JM		 2142 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2143 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2144 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2145 /* No KCK available to derive PMKID */
9d94e4bb
JM		 2146 wpa_printf(MSG_DEBUG,
2147 "RSN: No KCK available to derive PMKID for message 1/4");
929a2ea5 2148 pmkid = NULL;
a40bd06e
JM		 2149#ifdef CONFIG_FILS
2150 } else if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2151 if (sm->pmkid_set) {
2152 wpa_hexdump(MSG_DEBUG,
2153 "RSN: Message 1/4 PMKID from FILS/ERP",
2154 sm->pmkid, PMKID_LEN);
2155 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2156 sm->pmkid, PMKID_LEN);
2157 } else {
2158 /* No PMKID available */
2159 wpa_printf(MSG_DEBUG,
2160 "RSN: No FILS/ERP PMKID available for message 1/4");
2161 pmkid = NULL;
2162 }
2163#endif /* CONFIG_FILS */
fb1dee22
JM		 2164#ifdef CONFIG_IEEE80211R_AP
2165 } else if (wpa_key_mgmt_ft(sm->wpa_key_mgmt) &&
2166 sm->ft_completed) {
2167 wpa_printf(MSG_DEBUG,
2168 "FT: No PMKID in message 1/4 when using FT protocol");
2169 pmkid = NULL;
2170 pmkid_len = 0;
2171#endif /* CONFIG_IEEE80211R_AP */
9d94e4bb
JM		 2172#ifdef CONFIG_SAE
2173 } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2174 if (sm->pmkid_set) {
2175 wpa_hexdump(MSG_DEBUG,
2176 "RSN: Message 1/4 PMKID from SAE",
2177 sm->pmkid, PMKID_LEN);
2178 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2179 sm->pmkid, PMKID_LEN);
2180 } else {
2181 /* No PMKID available */
2182 wpa_printf(MSG_DEBUG,
2183 "RSN: No SAE PMKID available for message 1/4");
2184 pmkid = NULL;
2185 }
2186#endif /* CONFIG_SAE */
929a2ea5 2187 } else {
6fc6879b
JM		 2188 /*
2189 * Calculate PMKID since no PMKSA cache entry was
2190 * available with pre-calculated PMKID.
2191 */
207976f0 2192 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197 2193 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
41b81914 2194 sm->wpa_key_mgmt);
9d94e4bb
JM		 2195 wpa_hexdump(MSG_DEBUG,
2196 "RSN: Message 1/4 PMKID derived from PMK",
2197 &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN);
6fc6879b
JM		 2198 }
2199 }
2200 wpa_send_eapol(sm->wpa_auth, sm,
2201 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2202 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2203}
2204
2205
f23c5b17 2206static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2207 const u8 *pmk, unsigned int pmk_len,
2208 struct wpa_ptk *ptk)
6fc6879b 2209{
10ec6a5f
JM		 2210 const u8 *z = NULL;
2211 size_t z_len = 0;
2212
4ec1fd8e 2213#ifdef CONFIG_IEEE80211R_AP
b583ed38
JM		 2214 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2215 if (sm->ft_completed) {
2216 u8 ptk_name[WPA_PMK_NAME_LEN];
2217
2218 return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len,
2219 sm->SNonce, sm->ANonce,
2220 sm->addr, sm->wpa_auth->addr,
2221 sm->pmk_r1_name,
2222 ptk, ptk_name,
2223 sm->wpa_key_mgmt,
2224 sm->pairwise);
2225 }
267c366f 2226 return wpa_auth_derive_ptk_ft(sm, ptk);
b583ed38 2227 }
4ec1fd8e 2228#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2229
10ec6a5f
JM		 2230#ifdef CONFIG_DPP2
2231 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) {
2232 z = wpabuf_head(sm->dpp_z);
2233 z_len = wpabuf_len(sm->dpp_z);
2234 }
2235#endif /* CONFIG_DPP2 */
2236
207976f0 2237 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c 2238 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
10ec6a5f 2239 ptk, sm->wpa_key_mgmt, sm->pairwise, z, z_len);
6fc6879b
JM		 2240}
2241
2242
3b5b7aa8 2243#ifdef CONFIG_FILS
c4fd6d8a
JM		 2244
2245int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
80ddf5d9 2246 size_t pmk_len, const u8 *snonce, const u8 *anonce,
4cada9dc 2247 const u8 *dhss, size_t dhss_len,
80ddf5d9 2248 struct wpabuf *g_sta, struct wpabuf *g_ap)
c4fd6d8a
JM		 2249{
2250 u8 ick[FILS_ICK_MAX_LEN];
2251 size_t ick_len;
2252 int res;
8fed47e0
JM		 2253 u8 fils_ft[FILS_FT_MAX_LEN];
2254 size_t fils_ft_len = 0;
c4fd6d8a
JM		 2255
2256 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
4cada9dc
JM		 2257 snonce, anonce, dhss, dhss_len,
2258 &sm->PTK, ick, &ick_len,
8fed47e0
JM		 2259 sm->wpa_key_mgmt, sm->pairwise,
2260 fils_ft, &fils_ft_len);
c4fd6d8a
JM		 2261 if (res < 0)
2262 return res;
2263 sm->PTK_valid = TRUE;
2f1357fb 2264 sm->tk_already_set = FALSE;
c4fd6d8a 2265
8fed47e0
JM		 2266#ifdef CONFIG_IEEE80211R_AP
2267 if (fils_ft_len) {
2268 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2269 struct wpa_auth_config *conf = &wpa_auth->conf;
994eac7e
JM		 2270 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2271 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2272 size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
8fed47e0
JM		 2273
2274 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2275 conf->ssid, conf->ssid_len,
2276 conf->mobility_domain,
2277 conf->r0_key_holder,
2278 conf->r0_key_holder_len,
994eac7e
JM		 2279 sm->addr, pmk_r0, pmk_r0_name,
2280 use_sha384) < 0)
8fed47e0
JM		 2281 return -1;
2282
994eac7e
JM		 2283 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
2284 pmk_r0, pmk_r0_len);
8fed47e0
JM		 2285 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2286 pmk_r0_name, WPA_PMK_NAME_LEN);
89dea17e 2287 wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name);
8fed47e0 2288 os_memset(fils_ft, 0, sizeof(fils_ft));
36536639
JM		 2289
2290 res = wpa_derive_pmk_r1_name(pmk_r0_name, conf->r1_key_holder,
2291 sm->addr, sm->pmk_r1_name,
2292 use_sha384);
2293 os_memset(pmk_r0, 0, PMK_LEN_MAX);
2294 if (res < 0)
2295 return -1;
2296 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name,
2297 WPA_PMK_NAME_LEN);
2298 sm->pmk_r1_name_valid = 1;
8fed47e0
JM		 2299 }
2300#endif /* CONFIG_IEEE80211R_AP */
2301
c4fd6d8a
JM		 2302 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2303 sm->addr, sm->wpa_auth->addr,
80ddf5d9
JM		 2304 g_sta ? wpabuf_head(g_sta) : NULL,
2305 g_sta ? wpabuf_len(g_sta) : 0,
2306 g_ap ? wpabuf_head(g_ap) : NULL,
2307 g_ap ? wpabuf_len(g_ap) : 0,
c4fd6d8a
JM		 2308 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2309 sm->fils_key_auth_ap,
2310 &sm->fils_key_auth_len);
2311 os_memset(ick, 0, sizeof(ick));
78815f3d
JM		 2312
2313 /* Store nonces for (Re)Association Request/Response frame processing */
2314 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2315 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2316
c4fd6d8a
JM		 2317 return res;
2318}
2319
2320
3b5b7aa8 2321static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2322 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2323{
2324 struct ieee802_1x_hdr *hdr;
2325 struct wpa_eapol_key *key;
2326 u8 *pos;
2327 u16 key_data_len;
2328 u8 *tmp;
2329 const u8 *aad[1];
2330 size_t aad_len[1];
2331
75c8563e 2332 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2333 key = (struct wpa_eapol_key *) (hdr + 1);
2334 pos = (u8 *) (key + 1);
2335 key_data_len = WPA_GET_BE16(pos);
2336 if (key_data_len < AES_BLOCK_SIZE ||
2337 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2338 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2339 "No room for AES-SIV data in the frame");
2340 return -1;
2341 }
2342 pos += 2; /* Pointing at the Encrypted Key Data field */
2343
2344 tmp = os_malloc(key_data_len);
2345 if (!tmp)
2346 return -1;
2347
2348 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2349 * to Key Data (exclusive). */
75c8563e
JM		 2350 aad[0] = buf;
2351 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2352 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2353 1, aad, aad_len, tmp) < 0) {
2354 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2355 "Invalid AES-SIV data in the frame");
2356 bin_clear_free(tmp, key_data_len);
2357 return -1;
2358 }
2359
2360 /* AEAD decryption and validation completed successfully */
2361 key_data_len -= AES_BLOCK_SIZE;
2362 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2363 tmp, key_data_len);
2364
2365 /* Replace Key Data field with the decrypted version */
2366 os_memcpy(pos, tmp, key_data_len);
2367 pos -= 2; /* Key Data Length field */
2368 WPA_PUT_BE16(pos, key_data_len);
2369 bin_clear_free(tmp, key_data_len);
2370 if (_key_data_len)
2371 *_key_data_len = key_data_len;
2372 return 0;
2373}
78815f3d
JM		 2374
2375
087631b9
JM		 2376const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2377 const u8 *ies, size_t ies_len,
2378 const u8 *fils_session)
2379{
2380 const u8 *ie, *end;
2381 const u8 *session = NULL;
2382
2383 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2384 wpa_printf(MSG_DEBUG,
2385 "FILS: Not a FILS AKM - reject association");
2386 return NULL;
2387 }
2388
2389 /* Verify Session element */
2390 ie = ies;
2391 end = ((const u8 *) ie) + ies_len;
2392 while (ie + 1 < end) {
2393 if (ie + 2 + ie[1] > end)
2394 break;
2395 if (ie[0] == WLAN_EID_EXTENSION &&
2396 ie[1] >= 1 + FILS_SESSION_LEN &&
2397 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2398 session = ie;
2399 break;
2400 }
2401 ie += 2 + ie[1];
2402 }
2403
2404 if (!session) {
2405 wpa_printf(MSG_DEBUG,
2406 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2407 __func__);
2408 return NULL;
2409 }
2410
2411 if (!fils_session) {
2412 wpa_printf(MSG_DEBUG,
2413 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2414 __func__);
2415 return NULL;
2416 }
2417
2418 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2419 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2420 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2421 fils_session, FILS_SESSION_LEN);
2422 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2423 session + 3, FILS_SESSION_LEN);
2424 return NULL;
2425 }
2426 return session;
2427}
2428
2429
bd599353
JM		 2430int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2431 size_t ies_len)
2432{
2433 struct ieee802_11_elems elems;
2434
2435 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2436 wpa_printf(MSG_DEBUG,
2437 "FILS: Failed to parse decrypted elements");
2438 return -1;
2439 }
2440
8b5ddda5
JM		 2441 if (!elems.fils_session) {
2442 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2443 return -1;
2444 }
2445
bd599353
JM		 2446 if (!elems.fils_key_confirm) {
2447 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2448 return -1;
2449 }
2450
2451 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2452 wpa_printf(MSG_DEBUG,
2453 "FILS: Unexpected Key-Auth length %d (expected %d)",
2454 elems.fils_key_confirm_len,
2455 (int) sm->fils_key_auth_len);
2456 return -1;
2457 }
2458
2459 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2460 sm->fils_key_auth_len) != 0) {
2461 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2462 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2463 elems.fils_key_confirm, elems.fils_key_confirm_len);
2464 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2465 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2466 return -1;
2467 }
2468
2469 return 0;
2470}
2471
2472
78815f3d
JM		 2473int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2474 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2475 u8 *pos, size_t left)
2476{
2477 u16 fc, stype;
2478 const u8 *end, *ie_start, *ie, *session, *crypt;
78815f3d
JM		 2479 const u8 *aad[5];
2480 size_t aad_len[5];
2481
2482 if (!sm || !sm->PTK_valid) {
2483 wpa_printf(MSG_DEBUG,
2484 "FILS: No KEK to decrypt Assocication Request frame");
2485 return -1;
2486 }
2487
2488 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2489 wpa_printf(MSG_DEBUG,
2490 "FILS: Not a FILS AKM - reject association");
2491 return -1;
2492 }
2493
2494 end = ((const u8 *) mgmt) + frame_len;
2495 fc = le_to_host16(mgmt->frame_control);
2496 stype = WLAN_FC_GET_STYPE(fc);
2497 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2498 ie_start = mgmt->u.reassoc_req.variable;
2499 else
2500 ie_start = mgmt->u.assoc_req.variable;
2501 ie = ie_start;
2502
2503 /*
2504 * Find FILS Session element which is the last unencrypted element in
2505 * the frame.
2506 */
087631b9
JM		 2507 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2508 fils_session);
78815f3d 2509 if (!session) {
087631b9 2510 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
78815f3d
JM		 2511 return -1;
2512 }
087631b9 2513
78815f3d
JM		 2514 crypt = session + 2 + session[1];
2515
2516 if (end - crypt < AES_BLOCK_SIZE) {
2517 wpa_printf(MSG_DEBUG,
2518 "FILS: Too short frame to include AES-SIV data");
2519 return -1;
2520 }
2521
2522 /* AES-SIV AAD vectors */
2523
2524 /* The STA's MAC address */
2525 aad[0] = mgmt->sa;
2526 aad_len[0] = ETH_ALEN;
2527 /* The AP's BSSID */
2528 aad[1] = mgmt->da;
2529 aad_len[1] = ETH_ALEN;
2530 /* The STA's nonce */
2531 aad[2] = sm->SNonce;
2532 aad_len[2] = FILS_NONCE_LEN;
2533 /* The AP's nonce */
2534 aad[3] = sm->ANonce;
2535 aad_len[3] = FILS_NONCE_LEN;
2536 /*
2537 * The (Re)Association Request frame from the Capability Information
2538 * field to the FILS Session element (both inclusive).
2539 */
2540 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2541 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2542
2543 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2544 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2545 wpa_printf(MSG_DEBUG,
2546 "FILS: Invalid AES-SIV data in the frame");
2547 return -1;
2548 }
2549 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2550 pos, left - AES_BLOCK_SIZE);
2551
bd599353
JM		 2552 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2553 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
78815f3d
JM		 2554 return -1;
2555 }
2556
2557 return left - AES_BLOCK_SIZE;
2558}
2559
e73ffa09
JM		 2560
2561int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2562 size_t current_len, size_t max_len,
2563 const struct wpabuf *hlp)
e73ffa09
JM		 2564{
2565 u8 *end = buf + max_len;
2566 u8 *pos = buf + current_len;
2567 struct ieee80211_mgmt *mgmt;
2568 struct wpabuf *plain;
e73ffa09
JM		 2569 const u8 *aad[5];
2570 size_t aad_len[5];
2571
2572 if (!sm || !sm->PTK_valid)
2573 return -1;
2574
2575 wpa_hexdump(MSG_DEBUG,
2576 "FILS: Association Response frame before FILS processing",
2577 buf, current_len);
2578
2579 mgmt = (struct ieee80211_mgmt *) buf;
2580
2581 /* AES-SIV AAD vectors */
2582
2583 /* The AP's BSSID */
2584 aad[0] = mgmt->sa;
2585 aad_len[0] = ETH_ALEN;
2586 /* The STA's MAC address */
2587 aad[1] = mgmt->da;
2588 aad_len[1] = ETH_ALEN;
2589 /* The AP's nonce */
2590 aad[2] = sm->ANonce;
2591 aad_len[2] = FILS_NONCE_LEN;
2592 /* The STA's nonce */
2593 aad[3] = sm->SNonce;
2594 aad_len[3] = FILS_NONCE_LEN;
2595 /*
2596 * The (Re)Association Response frame from the Capability Information
2597 * field (the same offset in both Association and Reassociation
2598 * Response frames) to the FILS Session element (both inclusive).
2599 */
2600 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2601 aad_len[4] = pos - aad[4];
2602
2603 /* The following elements will be encrypted with AES-SIV */
9392859d
JM		 2604 plain = fils_prepare_plainbuf(sm, hlp);
2605 if (!plain) {
2606 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2607 return -1;
2608 }
2609
2610 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2611 wpa_printf(MSG_DEBUG,
2612 "FILS: Not enough room for FILS elements");
2613 wpabuf_free(plain);
2614 return -1;
2615 }
2616
2617 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2618 plain);
2619
2620 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2621 wpabuf_head(plain), wpabuf_len(plain),
2622 5, aad, aad_len, pos) < 0) {
2623 wpabuf_free(plain);
2624 return -1;
2625 }
2626
2627 wpa_hexdump(MSG_DEBUG,
2628 "FILS: Encrypted Association Response elements",
2629 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2630 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2631 wpabuf_free(plain);
2632
2633 sm->fils_completed = 1;
2634
2635 return current_len;
2636}
2637
2638
2639static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2640 const struct wpabuf *hlp)
2641{
2642 struct wpabuf *plain;
2643 u8 *len, *tmp, *tmp2;
2644 u8 hdr[2];
2645 u8 *gtk, dummy_gtk[32];
2646 size_t gtk_len;
2647 struct wpa_group *gsm;
e73ffa09
JM		 2648
2649 plain = wpabuf_alloc(1000);
2650 if (!plain)
9392859d 2651 return NULL;
e73ffa09
JM		 2652
2653 /* TODO: FILS Public Key */
2654
2655 /* FILS Key Confirmation */
2656 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2657 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2658 /* Element ID Extension */
2659 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2660 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2661
91d91abf
JM		 2662 /* FILS HLP Container */
2663 if (hlp)
2664 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2665
2666 /* TODO: FILS IP Address Assignment */
2667
2668 /* Key Delivery */
2669 gsm = sm->group;
2670 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2671 len = wpabuf_put(plain, 1);
2672 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2673 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2674 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2675 /* GTK KDE */
2676 gtk = gsm->GTK[gsm->GN - 1];
2677 gtk_len = gsm->GTK_len;
8d660a4b
JM		 2678 if (sm->wpa_auth->conf.disable_gtk ||
2679 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
e73ffa09
JM		 2680 /*
2681 * Provide unique random GTK to each STA to prevent use
2682 * of GTK in the BSS.
2683 */
2684 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2685 wpabuf_free(plain);
9392859d 2686 return NULL;
e73ffa09
JM		 2687 }
2688 gtk = dummy_gtk;
2689 }
2690 hdr[0] = gsm->GN & 0x03;
2691 hdr[1] = 0;
2692 tmp = wpabuf_put(plain, 0);
2693 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2694 gtk, gtk_len);
2695 wpabuf_put(plain, tmp2 - tmp);
2696
2697 /* IGTK KDE */
2698 tmp = wpabuf_put(plain, 0);
2699 tmp2 = ieee80211w_kde_add(sm, tmp);
2700 wpabuf_put(plain, tmp2 - tmp);
2701
2702 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
99621dc1
MV		 2703
2704#ifdef CONFIG_OCV
2705 if (wpa_auth_uses_ocv(sm)) {
2706 struct wpa_channel_info ci;
2707 u8 *pos;
2708
2709 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2710 wpa_printf(MSG_WARNING,
2711 "FILS: Failed to get channel info for OCI element");
2712 wpabuf_free(plain);
2713 return NULL;
2714 }
2715
2716 pos = wpabuf_put(plain, OCV_OCI_EXTENDED_LEN);
2717 if (ocv_insert_extended_oci(&ci, pos) < 0) {
2718 wpabuf_free(plain);
2719 return NULL;
2720 }
2721 }
2722#endif /* CONFIG_OCV */
2723
9392859d 2724 return plain;
e73ffa09
JM		 2725}
2726
da24c5aa
JM		 2727
2728int fils_set_tk(struct wpa_state_machine *sm)
2729{
2730 enum wpa_alg alg;
2731 int klen;
2732
2f1357fb
JM		 2733 if (!sm || !sm->PTK_valid) {
2734 wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK");
2735 return -1;
2736 }
2737 if (sm->tk_already_set) {
2738 wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver");
da24c5aa 2739 return -1;
2f1357fb 2740 }
da24c5aa
JM		 2741
2742 alg = wpa_cipher_to_alg(sm->pairwise);
2743 klen = wpa_cipher_key_len(sm->pairwise);
2744
2745 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2746 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2747 sm->PTK.tk, klen)) {
2748 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2749 return -1;
2750 }
2f1357fb 2751 sm->tk_already_set = TRUE;
da24c5aa
JM		 2752
2753 return 0;
2754}
2755
fa61bff6
JM		 2756
2757u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
8b5ddda5 2758 const u8 *fils_session, struct wpabuf *hlp)
fa61bff6
JM		 2759{
2760 struct wpabuf *plain;
2761 u8 *pos = buf;
2762
2763 /* FILS Session */
2764 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2765 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2766 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2767 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2768 pos += FILS_SESSION_LEN;
2769
8b5ddda5 2770 plain = fils_prepare_plainbuf(sm, hlp);
fa61bff6
JM		 2771 if (!plain) {
2772 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2773 return NULL;
2774 }
2775
2776 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2777 pos += wpabuf_len(plain);
2778
2779 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2780 (unsigned int) wpabuf_len(plain));
2781 wpabuf_free(plain);
2782 sm->fils_completed = 1;
2783 return pos;
2784}
2785
3b5b7aa8
JM		 2786#endif /* CONFIG_FILS */
2787
2788
1034f67b
MV		 2789#ifdef CONFIG_OCV
2790int get_sta_tx_parameters(struct wpa_state_machine *sm, int ap_max_chanwidth,
2791 int ap_seg1_idx, int *bandwidth, int *seg1_idx)
2792{
2793 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2794
2795 if (!wpa_auth->cb->get_sta_tx_params)
2796 return -1;
2797 return wpa_auth->cb->get_sta_tx_params(wpa_auth->cb_ctx, sm->addr,
2798 ap_max_chanwidth, ap_seg1_idx,
2799 bandwidth, seg1_idx);
2800}
2801#endif /* CONFIG_OCV */
2802
2803
6fc6879b
JM		 2804SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2805{
3b5b7aa8 2806 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2807 struct wpa_ptk PTK;
2c502460 2808 int ok = 0, psk_found = 0;
6fc6879b 2809 const u8 *pmk = NULL;
7a12edd1 2810 size_t pmk_len;
3b5b7aa8
JM		 2811 int ft;
2812 const u8 *eapol_key_ie, *key_data, *mic;
2813 u16 key_data_length;
2814 size_t mic_len, eapol_key_ie_len;
2815 struct ieee802_1x_hdr *hdr;
2816 struct wpa_eapol_key *key;
2817 struct wpa_eapol_ie_parse kde;
bb05d036 2818 int vlan_id = 0;
6fc6879b
JM		 2819
2820 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2821 sm->EAPOLKeyReceived = FALSE;
68921e24 2822 sm->update_snonce = FALSE;
b729fd8d 2823 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2824
567da5bb 2825 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3b5b7aa8 2826
6fc6879b
JM		 2827 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2828 * WPA-PSK: iterate through possible PSKs and select the one matching
2829 * the packet */
2830 for (;;) {
e61fea6b
JM		 2831 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2832 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
759fd76b 2833 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
dbfa691d
JM		 2834 sm->p2p_dev_addr, pmk, &pmk_len,
2835 &vlan_id);
6fc6879b
JM		 2836 if (pmk == NULL)
2837 break;
2c502460 2838 psk_found = 1;
f9854c18
MK		 2839#ifdef CONFIG_IEEE80211R_AP
2840 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2841 os_memcpy(sm->xxkey, pmk, pmk_len);
2842 sm->xxkey_len = pmk_len;
2843 }
2844#endif /* CONFIG_IEEE80211R_AP */
207976f0 2845 } else {
6fc6879b 2846 pmk = sm->PMK;
207976f0
JM		 2847 pmk_len = sm->pmk_len;
2848 }
6fc6879b 2849
a40bd06e
JM		 2850 if ((!pmk || !pmk_len) && sm->pmksa) {
2851 wpa_printf(MSG_DEBUG, "WPA: Use PMK from PMKSA cache");
2852 pmk = sm->pmksa->pmk;
2853 pmk_len = sm->pmksa->pmk_len;
2854 }
2855
364c064a
JM		 2856 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2857 break;
6fc6879b 2858
3b5b7aa8 2859 if (mic_len &&
567da5bb 2860 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
929a2ea5 2861 sm->last_rx_eapol_key,
6fc6879b 2862 sm->last_rx_eapol_key_len) == 0) {
08dc8efd
JM		 2863 if (sm->PMK != pmk) {
2864 os_memcpy(sm->PMK, pmk, pmk_len);
2865 sm->pmk_len = pmk_len;
2866 }
6fc6879b
JM		 2867 ok = 1;
2868 break;
2869 }
2870
3b5b7aa8 2871#ifdef CONFIG_FILS
75c8563e
JM		 2872 if (!mic_len &&
2873 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2874 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2875 ok = 1;
2876 break;
2877 }
2878#endif /* CONFIG_FILS */
2879
f5e0a332
JM		 2880 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
2881 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
6fc6879b
JM		 2882 break;
2883 }
2884
2885 if (!ok) {
2886 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2887 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2888 if (psk_found)
2889 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2890 return;
2891 }
2892
3b5b7aa8
JM		 2893 /*
2894 * Note: last_rx_eapol_key length fields have already been validated in
2895 * wpa_receive().
2896 */
2897 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2898 key = (struct wpa_eapol_key *) (hdr + 1);
2899 mic = (u8 *) (key + 1);
2900 key_data = mic + mic_len + 2;
2901 key_data_length = WPA_GET_BE16(mic + mic_len);
2902 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2903 sizeof(*key) - mic_len - 2)
2904 return;
2905
2906 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2907 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2908 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2909 return;
2910 }
2911 if (kde.rsn_ie) {
2912 eapol_key_ie = kde.rsn_ie;
2913 eapol_key_ie_len = kde.rsn_ie_len;
2914 } else if (kde.osen) {
2915 eapol_key_ie = kde.osen;
2916 eapol_key_ie_len = kde.osen_len;
2917 } else {
2918 eapol_key_ie = kde.wpa_ie;
2919 eapol_key_ie_len = kde.wpa_ie_len;
2920 }
2921 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2922 if (sm->wpa_ie == NULL ||
2923 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2924 eapol_key_ie, eapol_key_ie_len)) {
2925 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2926 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2927 if (sm->wpa_ie) {
2928 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2929 sm->wpa_ie, sm->wpa_ie_len);
2930 }
2931 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2932 eapol_key_ie, eapol_key_ie_len);
2933 /* MLME-DEAUTHENTICATE.request */
567da5bb
JM		 2934 wpa_sta_disconnect(wpa_auth, sm->addr,
2935 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2936 return;
2937 }
aed61c4e
MV		 2938#ifdef CONFIG_OCV
2939 if (wpa_auth_uses_ocv(sm)) {
2940 struct wpa_channel_info ci;
2941 int tx_chanwidth;
2942 int tx_seg1_idx;
2943
2944 if (wpa_channel_info(wpa_auth, &ci) != 0) {
2945 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2946 "Failed to get channel info to validate received OCI in EAPOL-Key 2/4");
2947 return;
2948 }
2949
2950 if (get_sta_tx_parameters(sm,
2951 channel_width_to_int(ci.chanwidth),
2952 ci.seg1_idx, &tx_chanwidth,
2953 &tx_seg1_idx) < 0)
2954 return;
2955
2956 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
2957 tx_chanwidth, tx_seg1_idx) != 0) {
2958 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2959 ocv_errorstr);
2960 return;
2961 }
2962 }
2963#endif /* CONFIG_OCV */
4ec1fd8e 2964#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8 2965 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
567da5bb
JM		 2966 wpa_sta_disconnect(wpa_auth, sm->addr,
2967 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2968 return;
2969 }
4ec1fd8e 2970#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2971#ifdef CONFIG_P2P
2972 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2973 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2974 int idx;
2975 wpa_printf(MSG_DEBUG,
2976 "P2P: IP address requested in EAPOL-Key exchange");
2977 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2978 if (idx >= 0) {
2979 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2980 bitfield_set(wpa_auth->ip_pool, idx);
2981 WPA_PUT_BE32(sm->ip_addr, start + idx);
2982 wpa_printf(MSG_DEBUG,
2983 "P2P: Assigned IP address %u.%u.%u.%u to "
2984 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2985 sm->ip_addr[2], sm->ip_addr[3],
2986 MAC2STR(sm->addr));
2987 }
2988 }
2989#endif /* CONFIG_P2P */
2990
4ec1fd8e 2991#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2992 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2993 /*
2994 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2995 * with the value we derived.
2996 */
870834a1
JM		 2997 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2998 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2999 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3000 "PMKR1Name mismatch in FT 4-way "
3001 "handshake");
3002 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
3003 "Supplicant",
3004 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
3005 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
3006 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
3007 return;
3008 }
3009 }
4ec1fd8e 3010#endif /* CONFIG_IEEE80211R_AP */
26e23750 3011
dbfa691d
JM		 3012 if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
3013 wpa_auth_update_vlan(wpa_auth, sm->addr, vlan_id) < 0) {
3014 wpa_sta_disconnect(wpa_auth, sm->addr,
3015 WLAN_REASON_PREV_AUTH_NOT_VALID);
3016 return;
3017 }
3018
e4bf4db9 3019 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 3020 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
3021
56586197 3022 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 3023 /* PSK may have changed from the previous choice, so update
3024 * state machine data based on whatever PSK was selected here.
3025 */
3026 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 3027 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 3028 }
3029
3030 sm->MICVerified = TRUE;
3031
3032 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
3033 sm->PTK_valid = TRUE;
3034}
3035
3036
3037SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
3038{
3039 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
3040 sm->TimeoutCtr = 0;
3041}
3042
3043
3044#ifdef CONFIG_IEEE80211W
3045
3046static int ieee80211w_kde_len(struct wpa_state_machine *sm)
3047{
3048 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 3049 size_t len;
3050 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
3051 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 3052 }
3053
3054 return 0;
3055}
3056
3057
3058static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
3059{
3060 struct wpa_igtk_kde igtk;
3061 struct wpa_group *gsm = sm->group;
03610ad2 3062 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 3063 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 3064
3065 if (!sm->mgmt_frame_prot)
3066 return pos;
3067
3068 igtk.keyid[0] = gsm->GN_igtk;
3069 igtk.keyid[1] = 0;
7b1080da 3070 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 3071 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 3072 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 3073 else
3074 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 3075 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
8d660a4b
JM		 3076 if (sm->wpa_auth->conf.disable_gtk ||
3077 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3078 /*
3079 * Provide unique random IGTK to each STA to prevent use of
3080 * IGTK in the BSS.
3081 */
8dd9f9cd 3082 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 3083 return pos;
3084 }
6fc6879b 3085 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 3086 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
3087 NULL, 0);
6fc6879b
JM		 3088
3089 return pos;
3090}
3091
3092#else /* CONFIG_IEEE80211W */
3093
3094static int ieee80211w_kde_len(struct wpa_state_machine *sm)
3095{
3096 return 0;
3097}
3098
3099
3100static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
3101{
3102 return pos;
3103}
3104
3105#endif /* CONFIG_IEEE80211W */
3106
3107
17c2559c
MV		 3108static int ocv_oci_len(struct wpa_state_machine *sm)
3109{
3110#ifdef CONFIG_OCV
3111 if (wpa_auth_uses_ocv(sm))
3112 return OCV_OCI_KDE_LEN;
3113#endif /* CONFIG_OCV */
3114 return 0;
3115}
3116
3117static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos)
3118{
3119#ifdef CONFIG_OCV
3120 struct wpa_channel_info ci;
3121
3122 if (!wpa_auth_uses_ocv(sm))
3123 return 0;
3124
3125 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3126 wpa_printf(MSG_WARNING,
3127 "Failed to get channel info for OCI element");
3128 return -1;
3129 }
3130
3131 return ocv_insert_oci_kde(&ci, argpos);
3132#else /* CONFIG_OCV */
3133 return 0;
3134#endif /* CONFIG_OCV */
3135}
3136
3137
6fc6879b
JM		 3138SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
3139{
83421850 3140 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 3141 size_t gtk_len, kde_len;
3142 struct wpa_group *gsm = sm->group;
3143 u8 *wpa_ie;
3144 int wpa_ie_len, secure, keyidx, encr = 0;
3145
3146 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
3147 sm->TimeoutEvt = FALSE;
bae61562
JM		 3148
3149 sm->TimeoutCtr++;
6f234c1e
JM		 3150 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3151 sm->TimeoutCtr > 1) {
3152 /* Do not allow retransmission of EAPOL-Key msg 3/4 */
3153 return;
3154 }
41f140d3 3155 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 3156 /* No point in sending the EAPOL-Key - we will disconnect
3157 * immediately following this. */
3158 return;
3159 }
3160
86dfabb8
JM		 3161 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
3162 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 3163 */
3164 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3165 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 3166 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 3167 wpa_ie = sm->wpa_auth->wpa_ie;
3168 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
3169 if (sm->wpa == WPA_VERSION_WPA &&
3170 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
3171 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 3172 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 3173 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 3174 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
3175 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 3176 wpa_ie_len = wpa_ie[1] + 2;
3177 }
3178 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3179 "sending 3/4 msg of 4-Way Handshake");
3180 if (sm->wpa == WPA_VERSION_WPA2) {
3181 /* WPA2 send GTK in the 4-way handshake */
3182 secure = 1;
3183 gtk = gsm->GTK[gsm->GN - 1];
3184 gtk_len = gsm->GTK_len;
8d660a4b
JM		 3185 if (sm->wpa_auth->conf.disable_gtk ||
3186 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3187 /*
3188 * Provide unique random GTK to each STA to prevent use
3189 * of GTK in the BSS.
3190 */
3191 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
3192 return;
3193 gtk = dummy_gtk;
3194 }
6fc6879b
JM		 3195 keyidx = gsm->GN;
3196 _rsc = rsc;
3197 encr = 1;
3198 } else {
3199 /* WPA does not include GTK in msg 3/4 */
3200 secure = 0;
3201 gtk = NULL;
3202 gtk_len = 0;
3203 keyidx = 0;
3204 _rsc = NULL;
0d442aff
JM		 3205 if (sm->rx_eapol_key_secure) {
3206 /*
3207 * It looks like Windows 7 supplicant tries to use
3208 * Secure bit in msg 2/4 after having reported Michael
3209 * MIC failure and it then rejects the 4-way handshake
3210 * if msg 3/4 does not set Secure bit. Work around this
3211 * by setting the Secure bit here even in the case of
3212 * WPA if the supplicant used it first.
3213 */
3214 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 3215 "STA used Secure bit in WPA msg 2/4 - "
3216 "set Secure for 3/4 as workaround");
0d442aff
JM		 3217 secure = 1;
3218 }
6fc6879b
JM		 3219 }
3220
17c2559c 3221 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
6fc6879b
JM		 3222 if (gtk)
3223 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 3224#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 3225 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3226 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
3227 kde_len += 300; /* FTIE + 2 * TIE */
3228 }
4ec1fd8e 3229#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3230#ifdef CONFIG_P2P
3231 if (WPA_GET_BE32(sm->ip_addr) > 0)
3232 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
3233#endif /* CONFIG_P2P */
6fc6879b
JM		 3234 kde = os_malloc(kde_len);
3235 if (kde == NULL)
3236 return;
3237
3238 pos = kde;
3239 os_memcpy(pos, wpa_ie, wpa_ie_len);
3240 pos += wpa_ie_len;
4ec1fd8e 3241#ifdef CONFIG_IEEE80211R_AP
26e23750 3242 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 3243 int res;
3244 size_t elen;
3245
3246 elen = pos - kde;
3247 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 3248 if (res < 0) {
3249 wpa_printf(MSG_ERROR, "FT: Failed to insert "
3250 "PMKR1Name into RSN IE in EAPOL-Key data");
3251 os_free(kde);
3252 return;
3253 }
59e78c24
JM		 3254 pos -= wpa_ie_len;
3255 pos += elen;
26e23750 3256 }
4ec1fd8e 3257#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3258 if (gtk) {
3259 u8 hdr[2];
3260 hdr[0] = keyidx & 0x03;
3261 hdr[1] = 0;
3262 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3263 gtk, gtk_len);
3264 }
3265 pos = ieee80211w_kde_add(sm, pos);
17c2559c
MV		 3266 if (ocv_oci_add(sm, &pos) < 0) {
3267 os_free(kde);
3268 return;
3269 }
6fc6879b 3270
4ec1fd8e 3271#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 3272 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3273 int res;
3274 struct wpa_auth_config *conf;
3275
3276 conf = &sm->wpa_auth->conf;
9257610a
JM		 3277 if (sm->assoc_resp_ftie &&
3278 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
3279 os_memcpy(pos, sm->assoc_resp_ftie,
3280 2 + sm->assoc_resp_ftie[1]);
3281 res = 2 + sm->assoc_resp_ftie[1];
3282 } else {
a7968ea5
JM		 3283 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3284
3285 res = wpa_write_ftie(conf, use_sha384,
3286 conf->r0_key_holder,
9257610a
JM		 3287 conf->r0_key_holder_len,
3288 NULL, NULL, pos,
3289 kde + kde_len - pos,
3290 NULL, 0);
3291 }
86dfabb8
JM		 3292 if (res < 0) {
3293 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3294 "into EAPOL-Key Key Data");
3295 os_free(kde);
3296 return;
3297 }
3298 pos += res;
3299
3300 /* TIE[ReassociationDeadline] (TU) */
3301 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3302 *pos++ = 5;
3303 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3304 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3305 pos += 4;
3306
3307 /* TIE[KeyLifetime] (seconds) */
3308 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3309 *pos++ = 5;
3310 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 3311 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
86dfabb8
JM		 3312 pos += 4;
3313 }
4ec1fd8e 3314#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3315#ifdef CONFIG_P2P
3316 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3317 u8 addr[3 * 4];
3318 os_memcpy(addr, sm->ip_addr, 4);
3319 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3320 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3321 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3322 addr, sizeof(addr), NULL, 0);
3323 }
3324#endif /* CONFIG_P2P */
86dfabb8 3325
6fc6879b 3326 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3327 (secure ? WPA_KEY_INFO_SECURE : 0) |
567da5bb
JM		 3328 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3329 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3330 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3331 WPA_KEY_INFO_KEY_TYPE,
3332 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3333 os_free(kde);
6fc6879b
JM		 3334}
3335
3336
3337SM_STATE(WPA_PTK, PTKINITDONE)
3338{
3339 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3340 sm->EAPOLKeyReceived = FALSE;
3341 if (sm->Pair) {
c3550295
JM		 3342 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3343 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 3344 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 3345 sm->PTK.tk, klen)) {
567da5bb
JM		 3346 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3347 WLAN_REASON_PREV_AUTH_NOT_VALID);
6fc6879b
JM		 3348 return;
3349 }
3350 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3351 sm->pairwise_set = TRUE;
3352
a40bd06e 3353 wpa_auth_set_ptk_rekey_timer(sm);
581a8cde 3354
a1ea1b45 3355 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 3356 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 3357 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 3358 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3359 WPA_EAPOL_authorized, 1);
3360 }
3361 }
3362
3363 if (0 /* IBSS == TRUE */) {
3364 sm->keycount++;
3365 if (sm->keycount == 2) {
3366 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3367 WPA_EAPOL_portValid, 1);
3368 }
3369 } else {
3370 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3371 1);
3372 }
3373 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3374 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3375 if (sm->wpa == WPA_VERSION_WPA)
3376 sm->PInitAKeys = TRUE;
3377 else
3378 sm->has_GTK = TRUE;
3379 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3380 "pairwise key handshake completed (%s)",
3381 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3382
4ec1fd8e 3383#ifdef CONFIG_IEEE80211R_AP
6fc6879b 3384 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 3385#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3386}
3387
3388
3389SM_STEP(WPA_PTK)
3390{
3391 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3392
3393 if (sm->Init)
3394 SM_ENTER(WPA_PTK, INITIALIZE);
3395 else if (sm->Disconnect
1aae01fc
BG		 3396 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3397 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3398 "WPA_PTK: sm->Disconnect");
6fc6879b 3399 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 3400 }
6fc6879b
JM		 3401 else if (sm->DeauthenticationRequest)
3402 SM_ENTER(WPA_PTK, DISCONNECTED);
3403 else if (sm->AuthenticationRequest)
3404 SM_ENTER(WPA_PTK, AUTHENTICATION);
3405 else if (sm->ReAuthenticationRequest)
3406 SM_ENTER(WPA_PTK, AUTHENTICATION2);
0adc9b28
JM		 3407 else if (sm->PTKRequest) {
3408 if (wpa_auth_sm_ptk_update(sm) < 0)
3409 SM_ENTER(WPA_PTK, DISCONNECTED);
3410 else
3411 SM_ENTER(WPA_PTK, PTKSTART);
3412 } else switch (sm->wpa_ptk_state) {
6fc6879b
JM		 3413 case WPA_PTK_INITIALIZE:
3414 break;
3415 case WPA_PTK_DISCONNECT:
3416 SM_ENTER(WPA_PTK, DISCONNECTED);
3417 break;
3418 case WPA_PTK_DISCONNECTED:
3419 SM_ENTER(WPA_PTK, INITIALIZE);
3420 break;
3421 case WPA_PTK_AUTHENTICATION:
3422 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3423 break;
3424 case WPA_PTK_AUTHENTICATION2:
56586197 3425 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 3426 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3427 WPA_EAPOL_keyRun) > 0)
3428 SM_ENTER(WPA_PTK, INITPMK);
a1ea1b45
JM		 3429 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3430 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
6fc6879b
JM		 3431 /* FIX: && 802.1X::keyRun */)
3432 SM_ENTER(WPA_PTK, INITPSK);
567da5bb
JM		 3433 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3434 SM_ENTER(WPA_PTK, INITPMK);
6fc6879b
JM		 3435 break;
3436 case WPA_PTK_INITPMK:
3437 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
567da5bb 3438 WPA_EAPOL_keyAvailable) > 0) {
6fc6879b 3439 SM_ENTER(WPA_PTK, PTKSTART);
567da5bb
JM		 3440#ifdef CONFIG_DPP
3441 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3442 SM_ENTER(WPA_PTK, PTKSTART);
3443#endif /* CONFIG_DPP */
3444 } else {
6fc6879b 3445 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 3446 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3447 "INITPMK - keyAvailable = false");
6fc6879b
JM		 3448 SM_ENTER(WPA_PTK, DISCONNECT);
3449 }
3450 break;
3451 case WPA_PTK_INITPSK:
759fd76b 3452 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
dbfa691d 3453 NULL, NULL, NULL)) {
6fc6879b 3454 SM_ENTER(WPA_PTK, PTKSTART);
e61fea6b
JM		 3455#ifdef CONFIG_SAE
3456 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3457 SM_ENTER(WPA_PTK, PTKSTART);
3458#endif /* CONFIG_SAE */
3459 } else {
6fc6879b
JM		 3460 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3461 "no PSK configured for the STA");
3462 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3463 SM_ENTER(WPA_PTK, DISCONNECT);
3464 }
3465 break;
3466 case WPA_PTK_PTKSTART:
3467 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3468 sm->EAPOLKeyPairwise)
3469 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3470 else if (sm->TimeoutCtr >
41f140d3 3471 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3472 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3473 wpa_auth_vlogger(
3474 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3475 "PTKSTART: Retry limit %u reached",
3476 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3477 SM_ENTER(WPA_PTK, DISCONNECT);
3478 } else if (sm->TimeoutEvt)
3479 SM_ENTER(WPA_PTK, PTKSTART);
3480 break;
3481 case WPA_PTK_PTKCALCNEGOTIATING:
3482 if (sm->MICVerified)
3483 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3484 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3485 sm->EAPOLKeyPairwise)
3486 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3487 else if (sm->TimeoutEvt)
3488 SM_ENTER(WPA_PTK, PTKSTART);
3489 break;
3490 case WPA_PTK_PTKCALCNEGOTIATING2:
3491 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3492 break;
3493 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3494 if (sm->update_snonce)
3495 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3496 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3497 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3498 SM_ENTER(WPA_PTK, PTKINITDONE);
3499 else if (sm->TimeoutCtr >
6f234c1e
JM		 3500 sm->wpa_auth->conf.wpa_pairwise_update_count ||
3501 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3502 sm->TimeoutCtr > 1)) {
6fc6879b 3503 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3504 wpa_auth_vlogger(
3505 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3506 "PTKINITNEGOTIATING: Retry limit %u reached",
3507 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3508 SM_ENTER(WPA_PTK, DISCONNECT);
3509 } else if (sm->TimeoutEvt)
3510 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3511 break;
3512 case WPA_PTK_PTKINITDONE:
3513 break;
3514 }
3515}
3516
3517
3518SM_STATE(WPA_PTK_GROUP, IDLE)
3519{
3520 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3521 if (sm->Init) {
3522 /* Init flag is not cleared here, so avoid busy
3523 * loop by claiming nothing changed. */
3524 sm->changed = FALSE;
3525 }
3526 sm->GTimeoutCtr = 0;
3527}
3528
3529
3530SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3531{
3532 u8 rsc[WPA_KEY_RSC_LEN];
3533 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3534 const u8 *kde;
3535 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3536 size_t kde_len;
83421850 3537 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3538
3539 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3540
3541 sm->GTimeoutCtr++;
6f234c1e
JM		 3542 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3543 sm->GTimeoutCtr > 1) {
3544 /* Do not allow retransmission of EAPOL-Key group msg 1/2 */
3545 return;
3546 }
41f140d3 3547 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3548 /* No point in sending the EAPOL-Key - we will disconnect
3549 * immediately following this. */
3550 return;
3551 }
3552
6fc6879b
JM		 3553 if (sm->wpa == WPA_VERSION_WPA)
3554 sm->PInitAKeys = FALSE;
3555 sm->TimeoutEvt = FALSE;
3556 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3557 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3558 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3559 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3560 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3561 "sending 1/2 msg of Group Key Handshake");
3562
83421850 3563 gtk = gsm->GTK[gsm->GN - 1];
8d660a4b
JM		 3564 if (sm->wpa_auth->conf.disable_gtk ||
3565 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3566 /*
3567 * Provide unique random GTK to each STA to prevent use
3568 * of GTK in the BSS.
3569 */
3570 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3571 return;
3572 gtk = dummy_gtk;
3573 }
6fc6879b
JM		 3574 if (sm->wpa == WPA_VERSION_WPA2) {
3575 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
17c2559c 3576 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
e41e4f9e
JM		 3577 kde_buf = os_malloc(kde_len);
3578 if (kde_buf == NULL)
6fc6879b
JM		 3579 return;
3580
e41e4f9e 3581 kde = pos = kde_buf;
6fc6879b
JM		 3582 hdr[0] = gsm->GN & 0x03;
3583 hdr[1] = 0;
3584 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3585 gtk, gsm->GTK_len);
6fc6879b 3586 pos = ieee80211w_kde_add(sm, pos);
17c2559c
MV		 3587 if (ocv_oci_add(sm, &pos) < 0) {
3588 os_free(kde_buf);
3589 return;
3590 }
e41e4f9e 3591 kde_len = pos - kde;
6fc6879b 3592 } else {
83421850 3593 kde = gtk;
e41e4f9e 3594 kde_len = gsm->GTK_len;
6fc6879b
JM		 3595 }
3596
3597 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3598 WPA_KEY_INFO_SECURE |
567da5bb
JM		 3599 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3600 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3601 WPA_KEY_INFO_ACK |
3602 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3603 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3604
3605 os_free(kde_buf);
6fc6879b
JM		 3606}
3607
3608
3609SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3610{
aed61c4e
MV		 3611#ifdef CONFIG_OCV
3612 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3613 const u8 *key_data, *mic;
3614 struct ieee802_1x_hdr *hdr;
3615 struct wpa_eapol_key *key;
3616 struct wpa_eapol_ie_parse kde;
3617 size_t mic_len;
3618 u16 key_data_length;
3619#endif /* CONFIG_OCV */
3620
6fc6879b
JM		 3621 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3622 sm->EAPOLKeyReceived = FALSE;
aed61c4e
MV		 3623
3624#ifdef CONFIG_OCV
3625 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3626
3627 /*
3628 * Note: last_rx_eapol_key length fields have already been validated in
3629 * wpa_receive().
3630 */
3631 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
3632 key = (struct wpa_eapol_key *) (hdr + 1);
3633 mic = (u8 *) (key + 1);
3634 key_data = mic + mic_len + 2;
3635 key_data_length = WPA_GET_BE16(mic + mic_len);
3636 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
3637 sizeof(*key) - mic_len - 2)
3638 return;
3639
3640 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
3641 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
3642 "received EAPOL-Key group msg 2/2 with invalid Key Data contents");
3643 return;
3644 }
3645
3646 if (wpa_auth_uses_ocv(sm)) {
3647 struct wpa_channel_info ci;
3648 int tx_chanwidth;
3649 int tx_seg1_idx;
3650
3651 if (wpa_channel_info(wpa_auth, &ci) != 0) {
3652 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3653 "Failed to get channel info to validate received OCI in EAPOL-Key group 1/2");
3654 return;
3655 }
3656
3657 if (get_sta_tx_parameters(sm,
3658 channel_width_to_int(ci.chanwidth),
3659 ci.seg1_idx, &tx_chanwidth,
3660 &tx_seg1_idx) < 0)
3661 return;
3662
3663 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
3664 tx_chanwidth, tx_seg1_idx) != 0) {
3665 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3666 ocv_errorstr);
3667 return;
3668 }
3669 }
3670#endif /* CONFIG_OCV */
3671
6fc6879b
JM		 3672 if (sm->GUpdateStationKeys)
3673 sm->group->GKeyDoneStations--;
3674 sm->GUpdateStationKeys = FALSE;
3675 sm->GTimeoutCtr = 0;
3676 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3677 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3678 "group key handshake completed (%s)",
3679 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3680 sm->has_GTK = TRUE;
3681}
3682
3683
3684SM_STATE(WPA_PTK_GROUP, KEYERROR)
3685{
3686 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3687 if (sm->GUpdateStationKeys)
3688 sm->group->GKeyDoneStations--;
3689 sm->GUpdateStationKeys = FALSE;
3690 sm->Disconnect = TRUE;
4bb9b674
GK		 3691 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3692 "group key handshake failed (%s) after %u tries",
3693 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3694 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3695}
3696
3697
3698SM_STEP(WPA_PTK_GROUP)
3699{
9663596f 3700 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3701 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3702 sm->PtkGroupInit = FALSE;
3703 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3704 case WPA_PTK_GROUP_IDLE:
3705 if (sm->GUpdateStationKeys ||
3706 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3707 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3708 break;
3709 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3710 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3711 !sm->EAPOLKeyPairwise && sm->MICVerified)
3712 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3713 else if (sm->GTimeoutCtr >
6f234c1e
JM		 3714 sm->wpa_auth->conf.wpa_group_update_count ||
3715 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3716 sm->GTimeoutCtr > 1))
6fc6879b
JM		 3717 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3718 else if (sm->TimeoutEvt)
3719 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3720 break;
3721 case WPA_PTK_GROUP_KEYERROR:
3722 SM_ENTER(WPA_PTK_GROUP, IDLE);
3723 break;
3724 case WPA_PTK_GROUP_REKEYESTABLISHED:
3725 SM_ENTER(WPA_PTK_GROUP, IDLE);
3726 break;
3727 }
3728}
3729
3730
3731static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3732 struct wpa_group *group)
3733{
3734 int ret = 0;
3735
6fc6879b
JM		 3736 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3737 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3738 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3739 wpa_auth->addr, group->GNonce,
3740 group->GTK[group->GN - 1], group->GTK_len) < 0)
3741 ret = -1;
5cb9d5c3
JM		 3742 wpa_hexdump_key(MSG_DEBUG, "GTK",
3743 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 3744
3745#ifdef CONFIG_IEEE80211W
70f8cc8e 3746 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3747 size_t len;
3748 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3749 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3750 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3751 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3752 wpa_auth->addr, group->GNonce,
8dd9f9cd 3753 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3754 ret = -1;
6fc6879b 3755 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3756 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 3757 }
3758#endif /* CONFIG_IEEE80211W */
3759
3760 return ret;
3761}
3762
3763
3764static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3765 struct wpa_group *group)
3766{
3767 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3768 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3769 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3770 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3771
3772 /* GTK[0..N] = 0 */
3773 os_memset(group->GTK, 0, sizeof(group->GTK));
3774 group->GN = 1;
3775 group->GM = 2;
3776#ifdef CONFIG_IEEE80211W
3777 group->GN_igtk = 4;
3778 group->GM_igtk = 5;
3779#endif /* CONFIG_IEEE80211W */
3780 /* GTK[GN] = CalcGTK() */
3781 wpa_gtk_update(wpa_auth, group);
3782}
3783
3784
3785static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3786{
473b6f22
MB		 3787 if (ctx != NULL && ctx != sm->group)
3788 return 0;
3789
6fc6879b
JM		 3790 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3791 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3792 "Not in PTKINITDONE; skip Group Key update");
3c183894 3793 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3794 return 0;
3795 }
9663596f
JM		 3796 if (sm->GUpdateStationKeys) {
3797 /*
3c183894
JM		 3798 * This should not really happen, so add a debug log entry.
3799 * Since we clear the GKeyDoneStations before the loop, the
3800 * station needs to be counted here anyway.
9663596f
JM		 3801 */
3802 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3803 "GUpdateStationKeys was already set when "
3804 "marking station for GTK rekeying");
9663596f 3805 }
3c183894 3806
ad3872a3 3807 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3808 if (sm->is_wnmsleep)
3809 return 0;
d32d94db 3810
3c183894
JM		 3811 sm->group->GKeyDoneStations++;
3812 sm->GUpdateStationKeys = TRUE;
3813
6fc6879b
JM		 3814 wpa_sm_step(sm);
3815 return 0;
3816}
3817
3818
b5bf84ba 3819#ifdef CONFIG_WNM_AP
ad3872a3 3820/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3821void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3822{
629edfef 3823 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3824 return;
3825
3826 wpa_group_update_sta(sm, NULL);
3827}
3828
3829
3830void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3831{
629edfef
JM		 3832 if (sm)
3833 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3834}
3835
3836
3837int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3838{
d32d94db 3839 struct wpa_group *gsm = sm->group;
835822d4 3840 u8 *start = pos;
d32d94db
XC		 3841
3842 /*
835822d4 3843 * GTK subelement:
d32d94db 3844 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3845 * Key[5..32]
d32d94db 3846 */
835822d4
JM		 3847 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3848 *pos++ = 11 + gsm->GTK_len;
d32d94db 3849 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3850 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3851 pos += 2;
3852 *pos++ = gsm->GTK_len;
3853 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3854 return 0;
835822d4
JM		 3855 pos += 8;
3856 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3857 pos += gsm->GTK_len;
d32d94db 3858
835822d4
JM		 3859 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3860 gsm->GN);
3861 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3862 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3863
835822d4 3864 return pos - start;
d32d94db
XC		 3865}
3866
3867
3868#ifdef CONFIG_IEEE80211W
3869int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3870{
d32d94db 3871 struct wpa_group *gsm = sm->group;
835822d4 3872 u8 *start = pos;
8dd9f9cd 3873 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3874
835822d4
JM		 3875 /*
3876 * IGTK subelement:
3877 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3878 */
3879 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3880 *pos++ = 2 + 6 + len;
835822d4
JM		 3881 WPA_PUT_LE16(pos, gsm->GN_igtk);
3882 pos += 2;
3883 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3884 return 0;
835822d4 3885 pos += 6;
d32d94db 3886
8dd9f9cd
JM		 3887 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3888 pos += len;
d32d94db 3889
835822d4
JM		 3890 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3891 gsm->GN_igtk);
3892 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3893 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3894
835822d4 3895 return pos - start;
d32d94db
XC		 3896}
3897#endif /* CONFIG_IEEE80211W */
b5bf84ba 3898#endif /* CONFIG_WNM_AP */
d32d94db
XC		 3899
3900
6fc6879b
JM		 3901static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3902 struct wpa_group *group)
3903{
3904 int tmp;
3905
3906 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3907 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3908 group->changed = TRUE;
3909 group->wpa_group_state = WPA_GROUP_SETKEYS;
3910 group->GTKReKey = FALSE;
3911 tmp = group->GM;
3912 group->GM = group->GN;
3913 group->GN = tmp;
3914#ifdef CONFIG_IEEE80211W
3915 tmp = group->GM_igtk;
3916 group->GM_igtk = group->GN_igtk;
3917 group->GN_igtk = tmp;
3918#endif /* CONFIG_IEEE80211W */
3919 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3920 * counting the STAs that are marked with GUpdateStationKeys instead of
3921 * including all STAs that could be in not-yet-completed state. */
3922 wpa_gtk_update(wpa_auth, group);
3923
3c183894
JM		 3924 if (group->GKeyDoneStations) {
3925 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3926 "GKeyDoneStations=%d when starting new GTK rekey",
3927 group->GKeyDoneStations);
3928 group->GKeyDoneStations = 0;
3929 }
473b6f22 3930 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3931 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3932 group->GKeyDoneStations);
3933}
3934
3935
1bdb7ab3
JM		 3936static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3937 struct wpa_group *group)
6fc6879b 3938{
3c7302c2
JM		 3939 int ret = 0;
3940
3c7302c2 3941 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3942 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3943 broadcast_ether_addr, group->GN,
3944 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3945 ret = -1;
6fc6879b
JM		 3946
3947#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3948 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3949 enum wpa_alg alg;
3950 size_t len;
3951
3952 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3953 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3954
3955 if (ret == 0 &&
3956 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3957 broadcast_ether_addr, group->GN_igtk,
3958 group->IGTK[group->GN_igtk - 4], len) < 0)
3959 ret = -1;
3960 }
6fc6879b 3961#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3962
3963 return ret;
6fc6879b
JM		 3964}
3965
3966
7d7f7be2
JM		 3967static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3968{
3969 if (sm->group == ctx) {
3970 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3971 " for discconnection due to fatal failure",
3972 MAC2STR(sm->addr));
3973 sm->Disconnect = TRUE;
3974 }
3975
3976 return 0;
3977}
3978
3979
3980static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3981 struct wpa_group *group)
3982{
3983 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3984 group->changed = TRUE;
3985 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3986 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3987}
3988
3989
1bdb7ab3
JM		 3990static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3991 struct wpa_group *group)
3992{
3993 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3994 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3995 group->changed = TRUE;
3996 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3997
7d7f7be2
JM		 3998 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3999 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 4000 return -1;
7d7f7be2 4001 }
1bdb7ab3
JM		 4002
4003 return 0;
4004}
4005
4006
6fc6879b
JM		 4007static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
4008 struct wpa_group *group)
4009{
4010 if (group->GInit) {
4011 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 4012 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
4013 /* Do not allow group operations */
6fc6879b
JM		 4014 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
4015 group->GTKAuthenticator) {
4016 wpa_group_setkeysdone(wpa_auth, group);
4017 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
4018 group->GTKReKey) {
4019 wpa_group_setkeys(wpa_auth, group);
4020 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
4021 if (group->GKeyDoneStations == 0)
4022 wpa_group_setkeysdone(wpa_auth, group);
4023 else if (group->GTKReKey)
4024 wpa_group_setkeys(wpa_auth, group);
4025 }
4026}
4027
4028
e4a6ea1d 4029static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 4030{
4031 if (sm == NULL)
e4a6ea1d 4032 return 0;
6fc6879b
JM		 4033
4034 if (sm->in_step_loop) {
4035 /* This should not happen, but if it does, make sure we do not
4036 * end up freeing the state machine too early by exiting the
4037 * recursive call. */
4038 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 4039 return 0;
6fc6879b
JM		 4040 }
4041
4042 sm->in_step_loop = 1;
4043 do {
4044 if (sm->pending_deinit)
4045 break;
4046
4047 sm->changed = FALSE;
4048 sm->wpa_auth->group->changed = FALSE;
4049
4050 SM_STEP_RUN(WPA_PTK);
4051 if (sm->pending_deinit)
4052 break;
4053 SM_STEP_RUN(WPA_PTK_GROUP);
4054 if (sm->pending_deinit)
4055 break;
4056 wpa_group_sm_step(sm->wpa_auth, sm->group);
4057 } while (sm->changed || sm->wpa_auth->group->changed);
4058 sm->in_step_loop = 0;
4059
4060 if (sm->pending_deinit) {
4061 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
4062 "machine deinit for " MACSTR, MAC2STR(sm->addr));
4063 wpa_free_sta_sm(sm);
e4a6ea1d 4064 return 1;
6fc6879b 4065 }
e4a6ea1d 4066 return 0;
6fc6879b
JM		 4067}
4068
4069
4070static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
4071{
4072 struct wpa_state_machine *sm = eloop_ctx;
4073 wpa_sm_step(sm);
4074}
4075
4076
4077void wpa_auth_sm_notify(struct wpa_state_machine *sm)
4078{
4079 if (sm == NULL)
4080 return;
4081 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
4082}
4083
4084
4085void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
4086{
4087 int tmp, i;
4088 struct wpa_group *group;
4089
4090 if (wpa_auth == NULL)
4091 return;
4092
4093 group = wpa_auth->group;
4094
4095 for (i = 0; i < 2; i++) {
4096 tmp = group->GM;
4097 group->GM = group->GN;
4098 group->GN = tmp;
4099#ifdef CONFIG_IEEE80211W
4100 tmp = group->GM_igtk;
4101 group->GM_igtk = group->GN_igtk;
4102 group->GN_igtk = tmp;
4103#endif /* CONFIG_IEEE80211W */
4104 wpa_gtk_update(wpa_auth, group);
9354e594 4105 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 4106 }
4107}
4108
4109
a6da824b 4110static const char * wpa_bool_txt(int val)
6fc6879b 4111{
a6da824b 4112 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 4113}
4114
4115
6fc6879b
JM		 4116#define RSN_SUITE "%02x-%02x-%02x-%d"
4117#define RSN_SUITE_ARG(s) \
4118((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
4119
4120int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
4121{
4122 int len = 0, ret;
4123 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 4124#ifdef CONFIG_RSN_PREAUTH
4125 const int preauth = 1;
4126#else /* CONFIG_RSN_PREAUTH */
4127 const int preauth = 0;
4128#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 4129
4130 if (wpa_auth == NULL)
4131 return len;
4132
4133 ret = os_snprintf(buf + len, buflen - len,
4134 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 4135 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 4136 "dot11RSNAEnabled=%s\n"
4137 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 4138 wpa_bool_txt(preauth),
6fc6879b
JM		 4139 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
4140 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 4141 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4142 return len;
4143 len += ret;
4144
4145 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
4146 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
4147
4148 ret = os_snprintf(
4149 buf + len, buflen - len,
4150 "dot11RSNAConfigVersion=%u\n"
4151 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
4152 /* FIX: dot11RSNAConfigGroupCipher */
4153 /* FIX: dot11RSNAConfigGroupRekeyMethod */
4154 /* FIX: dot11RSNAConfigGroupRekeyTime */
4155 /* FIX: dot11RSNAConfigGroupRekeyPackets */
4156 "dot11RSNAConfigGroupRekeyStrict=%u\n"
4157 "dot11RSNAConfigGroupUpdateCount=%u\n"
4158 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
4159 "dot11RSNAConfigGroupCipherSize=%u\n"
4160 "dot11RSNAConfigPMKLifetime=%u\n"
4161 "dot11RSNAConfigPMKReauthThreshold=%u\n"
4162 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
4163 "dot11RSNAConfigSATimeout=%u\n"
4164 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
4165 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
4166 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
4167 "dot11RSNAPMKIDUsed=%s\n"
4168 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
4169 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
4170 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
4171 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
4172 "dot11RSNA4WayHandshakeFailures=%u\n"
4173 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
4174 RSN_VERSION,
4175 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 4176 wpa_auth->conf.wpa_group_update_count,
4177 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 4178 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 4179 dot11RSNAConfigPMKLifetime,
4180 dot11RSNAConfigPMKReauthThreshold,
4181 dot11RSNAConfigSATimeout,
4182 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
4183 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
4184 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
4185 pmkid_txt,
4186 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
4187 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
4188 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
4189 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
4190 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 4191 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4192 return len;
4193 len += ret;
4194
4195 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
4196 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
4197
4198 /* Private MIB */
4199 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
4200 wpa_auth->group->wpa_group_state);
d85e1fc8 4201 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4202 return len;
4203 len += ret;
4204
4205 return len;
4206}
4207
4208
4209int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
4210{
4211 int len = 0, ret;
4212 u32 pairwise = 0;
4213
4214 if (sm == NULL)
4215 return 0;
4216
4217 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
4218
4219 /* dot11RSNAStatsEntry */
4220
c3550295
JM		 4221 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
4222 WPA_PROTO_RSN : WPA_PROTO_WPA,
4223 sm->pairwise);
4224 if (pairwise == 0)
6fc6879b
JM		 4225 return 0;
4226
4227 ret = os_snprintf(
4228 buf + len, buflen - len,
4229 /* TODO: dot11RSNAStatsIndex */
4230 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
4231 "dot11RSNAStatsVersion=1\n"
4232 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
4233 /* TODO: dot11RSNAStatsTKIPICVErrors */
4234 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 4235 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 4236 /* TODO: dot11RSNAStatsCCMPReplays */
4237 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
4238 /* TODO: dot11RSNAStatsTKIPReplays */,
4239 MAC2STR(sm->addr),
4240 RSN_SUITE_ARG(pairwise),
4241 sm->dot11RSNAStatsTKIPLocalMICFailures,
4242 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 4243 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4244 return len;
4245 len += ret;
4246
4247 /* Private MIB */
4248 ret = os_snprintf(buf + len, buflen - len,
4249 "hostapdWPAPTKState=%d\n"
4250 "hostapdWPAPTKGroupState=%d\n",
4251 sm->wpa_ptk_state,
4252 sm->wpa_ptk_group_state);
d85e1fc8 4253 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4254 return len;
4255 len += ret;
4256
4257 return len;
4258}
4259
4260
4261void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
4262{
4263 if (wpa_auth)
4264 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
4265}
4266
4267
4268int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
4269{
4270 return sm && sm->pairwise_set;
4271}
4272
4273
ff36ff00
JM		 4274int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
4275{
4276 return sm->pairwise;
4277}
4278
4279
b08c9ad0
MK		 4280const u8 * wpa_auth_get_pmk(struct wpa_state_machine *sm, int *len)
4281{
4282 if (!sm)
4283 return NULL;
4284 *len = sm->pmk_len;
4285 return sm->PMK;
4286}
4287
4288
6fc6879b
JM		 4289int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
4290{
4291 if (sm == NULL)
4292 return -1;
4293 return sm->wpa_key_mgmt;
4294}
4295
4296
4297int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
4298{
4299 if (sm == NULL)
4300 return 0;
4301 return sm->wpa;
4302}
4303
4304
0e3bd7ac
MV		 4305int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
4306{
4307 if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
4308 return 0;
4309 return sm->tk_already_set;
4310}
4311
4312
2f1357fb
JM		 4313int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm)
4314{
4315 if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt))
4316 return 0;
4317 return sm->tk_already_set;
4318}
4319
4320
6fc6879b
JM		 4321int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
4322 struct rsn_pmksa_cache_entry *entry)
4323{
4324 if (sm == NULL || sm->pmksa != entry)
4325 return -1;
4326 sm->pmksa = NULL;
4327 return 0;
4328}
4329
4330
4331struct rsn_pmksa_cache_entry *
4332wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
4333{
4334 return sm ? sm->pmksa : NULL;
4335}
4336
4337
4338void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
4339{
4340 if (sm)
4341 sm->dot11RSNAStatsTKIPLocalMICFailures++;
4342}
4343
4344
4345const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
4346{
4347 if (wpa_auth == NULL)
4348 return NULL;
4349 *len = wpa_auth->wpa_ie_len;
4350 return wpa_auth->wpa_ie;
4351}
4352
4353
4354int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 4355 unsigned int pmk_len,
6fc6879b
JM		 4356 int session_timeout, struct eapol_state_machine *eapol)
4357{
cb465555
JM		 4358 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
4359 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 4360 return -1;
4361
834c5d68 4362 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
207976f0
JM		 4363 if (pmk_len > PMK_LEN_SUITE_B_192)
4364 pmk_len = PMK_LEN_SUITE_B_192;
4365 } else if (pmk_len > PMK_LEN) {
4366 pmk_len = PMK_LEN;
4367 }
4368
70c93963 4369 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 4370 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 4371 sm->wpa_auth->addr, sm->addr, session_timeout,
4372 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 4373 return 0;
4374
4375 return -1;
4376}
4377
4378
4379int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4380 const u8 *pmk, size_t len, const u8 *sta_addr,
4381 int session_timeout,
4382 struct eapol_state_machine *eapol)
4383{
4384 if (wpa_auth == NULL)
4385 return -1;
4386
70c93963 4387 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 4388 NULL, 0,
4389 wpa_auth->addr,
4bb081f1
JM		 4390 sta_addr, session_timeout, eapol,
4391 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 4392 return 0;
4393
4394 return -1;
4395}
4396
4397
f2991170 4398int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 4399 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 4400{
4401 if (wpa_auth->conf.disable_pmksa_caching)
4402 return -1;
4403
70c93963 4404 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 4405 NULL, 0,
f2991170
JM		 4406 wpa_auth->addr, addr, 0, NULL,
4407 WPA_KEY_MGMT_SAE))
4408 return 0;
4409
4410 return -1;
4411}
4412
4413
9d94e4bb
JM		 4414void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid)
4415{
4416 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4417 sm->pmkid_set = 1;
4418}
4419
4420
0c52953b
JM		 4421int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4422 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4423 int session_timeout, int akmp)
4424{
4425 if (wpa_auth->conf.disable_pmksa_caching)
4426 return -1;
4427
4428 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4429 NULL, 0, wpa_auth->addr, addr, session_timeout,
4430 NULL, akmp))
4431 return 0;
4432
4433 return -1;
4434}
4435
4436
901d1fe1
JM		 4437void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4438 const u8 *sta_addr)
4439{
4440 struct rsn_pmksa_cache_entry *pmksa;
4441
4442 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4443 return;
4444 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4445 if (pmksa) {
4446 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4447 MACSTR " based on request", MAC2STR(sta_addr));
4448 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4449 }
4450}
4451
4452
b8daac18
MH		 4453int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4454 size_t len)
4455{
4456 if (!wpa_auth || !wpa_auth->pmksa)
4457 return 0;
4458 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4459}
4460
4461
4c522c77
MH		 4462void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4463{
4464 if (wpa_auth && wpa_auth->pmksa)
4465 pmksa_cache_auth_flush(wpa_auth->pmksa);
4466}
4467
4468
4d77d80e
MH		 4469#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4470#ifdef CONFIG_MESH
4471
4472int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4473 char *buf, size_t len)
4474{
4475 if (!wpa_auth || !wpa_auth->pmksa)
4476 return 0;
4477
4478 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4479}
4480
4481
4482struct rsn_pmksa_cache_entry *
4483wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4484 const u8 *pmkid, int expiration)
4485{
4486 struct rsn_pmksa_cache_entry *entry;
4487 struct os_reltime now;
4488
4489 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4490 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4491 if (!entry)
4492 return NULL;
4493
4494 os_get_reltime(&now);
4495 entry->expiration = now.sec + expiration;
4496 return entry;
4497}
4498
4499
4500int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4501 struct rsn_pmksa_cache_entry *entry)
4502{
4503 int ret;
4504
4505 if (!wpa_auth || !wpa_auth->pmksa)
4506 return -1;
4507
4508 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4509 if (ret < 0)
4510 wpa_printf(MSG_DEBUG,
4511 "RSN: Failed to store external PMKSA cache for "
4512 MACSTR, MAC2STR(entry->spa));
4513
4514 return ret;
4515}
4516
4517#endif /* CONFIG_MESH */
4518#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4519
4520
9f2cf23e 4521struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 4522wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4523 const u8 *pmkid)
9f2cf23e
MH		 4524{
4525 if (!wpa_auth || !wpa_auth->pmksa)
4526 return NULL;
c1bd4bac 4527 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 4528}
4529
4530
4531void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4532 struct wpa_state_machine *sm,
4533 struct wpa_authenticator *wpa_auth,
4534 u8 *pmkid, u8 *pmk)
4535{
4536 if (!sm)
4537 return;
4538
4539 sm->pmksa = pmksa;
8854f90b
JM		 4540 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4541 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4542 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 4543}
4544
4545
a0ad9e8c
MB		 4546/*
4547 * Remove and free the group from wpa_authenticator. This is triggered by a
4548 * callback to make sure nobody is currently iterating the group list while it
4549 * gets modified.
4550 */
4551static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4552 struct wpa_group *group)
4553{
4554 struct wpa_group *prev = wpa_auth->group;
4555
4556 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4557 group->vlan_id);
4558
4559 while (prev) {
4560 if (prev->next == group) {
4561 /* This never frees the special first group as needed */
4562 prev->next = group->next;
4563 os_free(group);
4564 break;
4565 }
4566 prev = prev->next;
4567 }
4568
4569}
4570
4571
4572/* Increase the reference counter for group */
4573static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4574 struct wpa_group *group)
4575{
4576 /* Skip the special first group */
4577 if (wpa_auth->group == group)
4578 return;
4579
4580 group->references++;
4581}
4582
4583
4584/* Decrease the reference counter and maybe free the group */
4585static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4586 struct wpa_group *group)
4587{
4588 /* Skip the special first group */
4589 if (wpa_auth->group == group)
4590 return;
4591
4592 group->references--;
4593 if (group->references)
4594 return;
4595 wpa_group_free(wpa_auth, group);
4596}
4597
4598
4599/*
4600 * Add a group that has its references counter set to zero. Caller needs to
4601 * call wpa_group_get() on the return value to mark the entry in use.
4602 */
6fc6879b
JM		 4603static struct wpa_group *
4604wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4605{
4606 struct wpa_group *group;
4607
4608 if (wpa_auth == NULL || wpa_auth->group == NULL)
4609 return NULL;
4610
4611 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4612 vlan_id);
bdffdc5d 4613 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4614 if (group == NULL)
4615 return NULL;
4616
4617 group->next = wpa_auth->group->next;
4618 wpa_auth->group->next = group;
4619
4620 return group;
4621}
4622
4623
7cebc8e2
MB		 4624/*
4625 * Enforce that the group state machine for the VLAN is running, increase
4626 * reference counter as interface is up. References might have been increased
4627 * even if a negative value is returned.
4628 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4629 */
4630int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4631{
4632 struct wpa_group *group;
4633
4634 if (wpa_auth == NULL)
4635 return 0;
4636
4637 group = wpa_auth->group;
4638 while (group) {
4639 if (group->vlan_id == vlan_id)
4640 break;
4641 group = group->next;
4642 }
4643
4644 if (group == NULL) {
4645 group = wpa_auth_add_group(wpa_auth, vlan_id);
4646 if (group == NULL)
4647 return -1;
4648 }
4649
4650 wpa_printf(MSG_DEBUG,
4651 "WPA: Ensure group state machine running for VLAN ID %d",
4652 vlan_id);
4653
4654 wpa_group_get(wpa_auth, group);
4655 group->num_setup_iface++;
4656
4657 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4658 return -1;
4659
4660 return 0;
4661}
4662
4663
4664/*
4665 * Decrease reference counter, expected to be zero afterwards.
4666 * returns: -1 on error (group not found, group in fail state)
4667 * -2 if wpa_group is still referenced
4668 * 0 else
4669 */
4670int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4671{
4672 struct wpa_group *group;
4673 int ret = 0;
4674
4675 if (wpa_auth == NULL)
4676 return 0;
4677
4678 group = wpa_auth->group;
4679 while (group) {
4680 if (group->vlan_id == vlan_id)
4681 break;
4682 group = group->next;
4683 }
4684
4685 if (group == NULL)
4686 return -1;
4687
4688 wpa_printf(MSG_DEBUG,
4689 "WPA: Try stopping group state machine for VLAN ID %d",
4690 vlan_id);
4691
4692 if (group->num_setup_iface <= 0) {
4693 wpa_printf(MSG_ERROR,
4694 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4695 vlan_id);
4696 return -1;
4697 }
4698 group->num_setup_iface--;
4699
4700 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4701 ret = -1;
4702
4703 if (group->references > 1) {
4704 wpa_printf(MSG_DEBUG,
4705 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4706 vlan_id);
4707 ret = -2;
4708 }
4709
4710 wpa_group_put(wpa_auth, group);
4711
4712 return ret;
4713}
4714
4715
6fc6879b
JM		 4716int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4717{
4718 struct wpa_group *group;
4719
4720 if (sm == NULL || sm->wpa_auth == NULL)
4721 return 0;
4722
4723 group = sm->wpa_auth->group;
4724 while (group) {
4725 if (group->vlan_id == vlan_id)
4726 break;
4727 group = group->next;
4728 }
4729
4730 if (group == NULL) {
4731 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4732 if (group == NULL)
4733 return -1;
4734 }
4735
4736 if (sm->group == group)
4737 return 0;
4738
7d7f7be2
JM		 4739 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4740 return -1;
4741
6fc6879b
JM		 4742 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4743 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4744
a0ad9e8c
MB		 4745 wpa_group_get(sm->wpa_auth, group);
4746 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4747 sm->group = group;
a0ad9e8c 4748
6fc6879b
JM		 4749 return 0;
4750}
e4bf4db9
JM		 4751
4752
4753void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4754 struct wpa_state_machine *sm, int ack)
4755{
4756 if (wpa_auth == NULL || sm == NULL)
4757 return;
4758 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4759 " ack=%d", MAC2STR(sm->addr), ack);
4760 if (sm->pending_1_of_4_timeout && ack) {
4761 /*
4762 * Some deployed supplicant implementations update their SNonce
4763 * for each EAPOL-Key 2/4 message even within the same 4-way
4764 * handshake and then fail to use the first SNonce when
4765 * deriving the PTK. This results in unsuccessful 4-way
4766 * handshake whenever the relatively short initial timeout is
4767 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4768 * around this by increasing the timeout now that we know that
4769 * the station has received the frame.
4770 */
4771 int timeout_ms = eapol_key_timeout_subseq;
4772 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4773 "timeout by %u ms because of acknowledged frame",
4774 timeout_ms);
4775 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4776 eloop_register_timeout(timeout_ms / 1000,
4777 (timeout_ms % 1000) * 1000,
4778 wpa_send_eapol_timeout, wpa_auth, sm);
4779 }
3d695328
JM		 4780
4781#ifdef CONFIG_TESTING_OPTIONS
4782 if (sm->eapol_status_cb) {
4783 sm->eapol_status_cb(sm->eapol_status_cb_ctx1,
4784 sm->eapol_status_cb_ctx2);
4785 sm->eapol_status_cb = NULL;
4786 }
4787#endif /* CONFIG_TESTING_OPTIONS */
e4bf4db9 4788}
c10347f2
JM		 4789
4790
4791int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4792{
4793 if (sm == NULL)
4794 return 0;
4795 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4796}
aa189ac9
JM		 4797
4798
4799int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4800{
4801 if (sm == NULL)
4802 return 0;
4803 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4804}
25ef8529
JM		 4805
4806
4807#ifdef CONFIG_P2P
4808int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4809{
4810 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4811 return -1;
4812 os_memcpy(addr, sm->ip_addr, 4);
4813 return 0;
4814}
4815#endif /* CONFIG_P2P */
cbc210de
JM		 4816
4817
4818int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4819 struct radius_das_attrs *attr)
4820{
4821 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4822}
34782730
JM		 4823
4824
4825void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4826{
4827 struct wpa_group *group;
4828
4829 if (!wpa_auth)
4830 return;
4831 for (group = wpa_auth->group; group; group = group->next)
4832 wpa_group_config_group_keys(wpa_auth, group);
4833}
7eace378
JM		 4834
4835
4836#ifdef CONFIG_FILS
4837
4838struct wpa_auth_fils_iter_data {
4839 struct wpa_authenticator *auth;
4840 const u8 *cache_id;
4841 struct rsn_pmksa_cache_entry *pmksa;
4842 const u8 *spa;
4843 const u8 *pmkid;
4844};
4845
4846
4847static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4848{
4849 struct wpa_auth_fils_iter_data *data = ctx;
4850
4cc6574d 4851 if (a == data->auth || !a->conf.fils_cache_id_set ||
7eace378
JM		 4852 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4853 FILS_CACHE_ID_LEN) != 0)
4854 return 0;
4855 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4856 return data->pmksa != NULL;
4857}
4858
4859
4860struct rsn_pmksa_cache_entry *
4861wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4862 const u8 *sta_addr, const u8 *pmkid)
4863{
4864 struct wpa_auth_fils_iter_data idata;
4865
4866 if (!wpa_auth->conf.fils_cache_id_set)
4867 return NULL;
4868 idata.auth = wpa_auth;
4869 idata.cache_id = wpa_auth->conf.fils_cache_id;
4870 idata.pmksa = NULL;
4871 idata.spa = sta_addr;
4872 idata.pmkid = pmkid;
4873 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4874 return idata.pmksa;
4875}
4876
5db997e3
JM		 4877
4878#ifdef CONFIG_IEEE80211R_AP
a7968ea5
JM		 4879int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384,
4880 u8 *buf, size_t len)
5db997e3
JM		 4881{
4882 struct wpa_auth_config *conf = &wpa_auth->conf;
4883
a7968ea5 4884 return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder,
5db997e3
JM		 4885 conf->r0_key_holder_len,
4886 NULL, NULL, buf, len, NULL, 0);
4887}
4888#endif /* CONFIG_IEEE80211R_AP */
4889
8acbf85f
JM		 4890
4891void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4892 u8 *fils_anonce, u8 *fils_snonce,
4893 u8 *fils_kek, size_t *fils_kek_len)
4894{
4895 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4896 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4897 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4898 *fils_kek_len = sm->PTK.kek_len;
4899}
4900
a40bd06e
JM		 4901
4902void wpa_auth_add_fils_pmk_pmkid(struct wpa_state_machine *sm, const u8 *pmk,
4903 size_t pmk_len, const u8 *pmkid)
4904{
4905 os_memcpy(sm->PMK, pmk, pmk_len);
4906 sm->pmk_len = pmk_len;
4907 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4908 sm->pmkid_set = 1;
4909}
4910
7eace378 4911#endif /* CONFIG_FILS */
6bc2f00f
JM		 4912
4913
36536639
JM		 4914void wpa_auth_set_auth_alg(struct wpa_state_machine *sm, u16 auth_alg)
4915{
4916 if (sm)
4917 sm->auth_alg = auth_alg;
4918}
4919
4920
10ec6a5f
JM		 4921#ifdef CONFIG_DPP2
4922void wpa_auth_set_dpp_z(struct wpa_state_machine *sm, const struct wpabuf *z)
4923{
4924 if (sm) {
4925 wpabuf_clear_free(sm->dpp_z);
4926 sm->dpp_z = z ? wpabuf_dup(z) : NULL;
4927 }
4928}
4929#endif /* CONFIG_DPP2 */
4930
4931
82424732 4932#ifdef CONFIG_TESTING_OPTIONS
d8afdb21 4933
3d695328
JM		 4934int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce,
4935 void (*cb)(void *ctx1, void *ctx2),
4936 void *ctx1, void *ctx2)
d8afdb21
JM		 4937{
4938 const u8 *anonce = sm->ANonce;
4939 u8 anonce_buf[WPA_NONCE_LEN];
4940
4941 if (change_anonce) {
4942 if (random_get_bytes(anonce_buf, WPA_NONCE_LEN))
4943 return -1;
4944 anonce = anonce_buf;
4945 }
4946
4947 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4948 "sending 1/4 msg of 4-Way Handshake (TESTING)");
4949 wpa_send_eapol(sm->wpa_auth, sm,
4950 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
4951 anonce, NULL, 0, 0, 0);
4952 return 0;
4953}
4954
4955
3d695328
JM		 4956int wpa_auth_resend_m3(struct wpa_state_machine *sm,
4957 void (*cb)(void *ctx1, void *ctx2),
4958 void *ctx1, void *ctx2)
d8afdb21 4959{
0c3bc1be
LD		 4960 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
4961#ifdef CONFIG_IEEE80211W
4962 u8 *opos;
4963#endif /* CONFIG_IEEE80211W */
d8afdb21
JM		 4964 size_t gtk_len, kde_len;
4965 struct wpa_group *gsm = sm->group;
4966 u8 *wpa_ie;
4967 int wpa_ie_len, secure, keyidx, encr = 0;
4968
4969 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
4970 GTK[GN], IGTK, [FTIE], [TIE * 2])
4971 */
4972
4973 /* Use 0 RSC */
4974 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4975 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
4976 wpa_ie = sm->wpa_auth->wpa_ie;
4977 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
4978 if (sm->wpa == WPA_VERSION_WPA &&
4979 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
4980 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
4981 /* WPA-only STA, remove RSN IE and possible MDIE */
4982 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4983 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
4984 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4985 wpa_ie_len = wpa_ie[1] + 2;
4986 }
4987 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4988 "sending 3/4 msg of 4-Way Handshake (TESTING)");
4989 if (sm->wpa == WPA_VERSION_WPA2) {
4990 /* WPA2 send GTK in the 4-way handshake */
4991 secure = 1;
4992 gtk = gsm->GTK[gsm->GN - 1];
4993 gtk_len = gsm->GTK_len;
4994 keyidx = gsm->GN;
4995 _rsc = rsc;
4996 encr = 1;
4997 } else {
4998 /* WPA does not include GTK in msg 3/4 */
4999 secure = 0;
5000 gtk = NULL;
5001 gtk_len = 0;
5002 keyidx = 0;
5003 _rsc = NULL;
5004 if (sm->rx_eapol_key_secure) {
5005 /*
5006 * It looks like Windows 7 supplicant tries to use
5007 * Secure bit in msg 2/4 after having reported Michael
5008 * MIC failure and it then rejects the 4-way handshake
5009 * if msg 3/4 does not set Secure bit. Work around this
5010 * by setting the Secure bit here even in the case of
5011 * WPA if the supplicant used it first.
5012 */
5013 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5014 "STA used Secure bit in WPA msg 2/4 - "
5015 "set Secure for 3/4 as workaround");
5016 secure = 1;
5017 }
5018 }
5019
17c2559c 5020 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
d8afdb21
JM		 5021 if (gtk)
5022 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
5023#ifdef CONFIG_IEEE80211R_AP
5024 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5025 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
5026 kde_len += 300; /* FTIE + 2 * TIE */
5027 }
5028#endif /* CONFIG_IEEE80211R_AP */
5029 kde = os_malloc(kde_len);
5030 if (kde == NULL)
5031 return -1;
5032
5033 pos = kde;
5034 os_memcpy(pos, wpa_ie, wpa_ie_len);
5035 pos += wpa_ie_len;
5036#ifdef CONFIG_IEEE80211R_AP
5037 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5038 int res;
5039 size_t elen;
5040
5041 elen = pos - kde;
5042 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
5043 if (res < 0) {
5044 wpa_printf(MSG_ERROR, "FT: Failed to insert "
5045 "PMKR1Name into RSN IE in EAPOL-Key data");
5046 os_free(kde);
5047 return -1;
5048 }
5049 pos -= wpa_ie_len;
5050 pos += elen;
5051 }
5052#endif /* CONFIG_IEEE80211R_AP */
5053 if (gtk) {
5054 u8 hdr[2];
5055 hdr[0] = keyidx & 0x03;
5056 hdr[1] = 0;
5057 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5058 gtk, gtk_len);
5059 }
0c3bc1be 5060#ifdef CONFIG_IEEE80211W
d8afdb21
JM		 5061 opos = pos;
5062 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 5063 if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5064 /* skip KDE header and keyid */
5065 opos += 2 + RSN_SELECTOR_LEN + 2;
d8afdb21
JM		 5066 os_memset(opos, 0, 6); /* clear PN */
5067 }
0c3bc1be 5068#endif /* CONFIG_IEEE80211W */
17c2559c
MV		 5069 if (ocv_oci_add(sm, &pos) < 0) {
5070 os_free(kde);
5071 return -1;
5072 }
d8afdb21
JM		 5073
5074#ifdef CONFIG_IEEE80211R_AP
5075 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5076 int res;
5077 struct wpa_auth_config *conf;
5078
5079 conf = &sm->wpa_auth->conf;
5080 if (sm->assoc_resp_ftie &&
5081 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
5082 os_memcpy(pos, sm->assoc_resp_ftie,
5083 2 + sm->assoc_resp_ftie[1]);
5084 res = 2 + sm->assoc_resp_ftie[1];
5085 } else {
a7968ea5
JM		 5086 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
5087
5088 res = wpa_write_ftie(conf, use_sha384,
5089 conf->r0_key_holder,
d8afdb21
JM		 5090 conf->r0_key_holder_len,
5091 NULL, NULL, pos,
5092 kde + kde_len - pos,
5093 NULL, 0);
5094 }
5095 if (res < 0) {
5096 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
5097 "into EAPOL-Key Key Data");
5098 os_free(kde);
5099 return -1;
5100 }
5101 pos += res;
5102
5103 /* TIE[ReassociationDeadline] (TU) */
5104 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5105 *pos++ = 5;
5106 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
5107 WPA_PUT_LE32(pos, conf->reassociation_deadline);
5108 pos += 4;
5109
5110 /* TIE[KeyLifetime] (seconds) */
5111 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5112 *pos++ = 5;
5113 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 5114 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
d8afdb21
JM		 5115 pos += 4;
5116 }
5117#endif /* CONFIG_IEEE80211R_AP */
5118
5119 wpa_send_eapol(sm->wpa_auth, sm,
5120 (secure ? WPA_KEY_INFO_SECURE : 0) |
5121 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5122 WPA_KEY_INFO_MIC : 0) |
5123 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
5124 WPA_KEY_INFO_KEY_TYPE,
5125 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
5126 os_free(kde);
5127 return 0;
5128}
5129
5130
3d695328
JM		 5131int wpa_auth_resend_group_m1(struct wpa_state_machine *sm,
5132 void (*cb)(void *ctx1, void *ctx2),
5133 void *ctx1, void *ctx2)
6bc2f00f
JM		 5134{
5135 u8 rsc[WPA_KEY_RSC_LEN];
5136 struct wpa_group *gsm = sm->group;
5137 const u8 *kde;
0c3bc1be
LD		 5138 u8 *kde_buf = NULL, *pos, hdr[2];
5139#ifdef CONFIG_IEEE80211W
5140 u8 *opos;
5141#endif /* CONFIG_IEEE80211W */
6bc2f00f
JM		 5142 size_t kde_len;
5143 u8 *gtk;
5144
5145 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
5146 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
5147 /* Use 0 RSC */
5148 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5149 "sending 1/2 msg of Group Key Handshake (TESTING)");
5150
5151 gtk = gsm->GTK[gsm->GN - 1];
5152 if (sm->wpa == WPA_VERSION_WPA2) {
5153 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
17c2559c 5154 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
6bc2f00f
JM		 5155 kde_buf = os_malloc(kde_len);
5156 if (kde_buf == NULL)
5157 return -1;
5158
5159 kde = pos = kde_buf;
5160 hdr[0] = gsm->GN & 0x03;
5161 hdr[1] = 0;
5162 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5163 gtk, gsm->GTK_len);
0c3bc1be 5164#ifdef CONFIG_IEEE80211W
6bc2f00f
JM		 5165 opos = pos;
5166 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 5167 if (pos - opos >=
5168 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5169 /* skip KDE header and keyid */
5170 opos += 2 + RSN_SELECTOR_LEN + 2;
6bc2f00f
JM		 5171 os_memset(opos, 0, 6); /* clear PN */
5172 }
0c3bc1be 5173#endif /* CONFIG_IEEE80211W */
17c2559c
MV		 5174 if (ocv_oci_add(sm, &pos) < 0) {
5175 os_free(kde_buf);
5176 return -1;
5177 }
6bc2f00f
JM		 5178 kde_len = pos - kde;
5179 } else {
5180 kde = gtk;
5181 kde_len = gsm->GTK_len;
5182 }
5183
3d695328
JM		 5184 sm->eapol_status_cb = cb;
5185 sm->eapol_status_cb_ctx1 = ctx1;
5186 sm->eapol_status_cb_ctx2 = ctx2;
5187
6bc2f00f
JM		 5188 wpa_send_eapol(sm->wpa_auth, sm,
5189 WPA_KEY_INFO_SECURE |
5190 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5191 WPA_KEY_INFO_MIC : 0) |
5192 WPA_KEY_INFO_ACK |
5193 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
5194 rsc, NULL, kde, kde_len, gsm->GN, 1);
5195
5196 os_free(kde_buf);
5197 return 0;
5198}
d8afdb21 5199
92662fb2
JB		 5200
5201int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth)
5202{
5203 if (!wpa_auth)
5204 return -1;
5205 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
5206 return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL);
5207}
5208
6bc2f00f 5209#endif /* CONFIG_TESTING_OPTIONS */
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