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AP: Provide correct keyid to wpa_send_eapol() for EAPOL-Key msg 3/4
[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));
31bc66e4 937 forced_memzero(&PTK, sizeof(PTK));
f23c5b17
JM		 938 sm->PTK_valid = TRUE;
939
940 return 0;
941}
942
943
6fc6879b
JM		 944void wpa_receive(struct wpa_authenticator *wpa_auth,
945 struct wpa_state_machine *sm,
946 u8 *data, size_t data_len)
947{
948 struct ieee802_1x_hdr *hdr;
949 struct wpa_eapol_key *key;
950 u16 key_info, key_data_length;
a0bf1b68 951 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg;
6fc6879b
JM		 952 char *msgtxt;
953 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 954 const u8 *key_data;
955 size_t keyhdrlen, mic_len;
6d014ffc 956 u8 *mic;
6fc6879b
JM		 957
958 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
959 return;
dc5bad48 960 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 961
567da5bb 962 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 963 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 964
dc5bad48
JM		 965 if (data_len < sizeof(*hdr) + keyhdrlen) {
966 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 967 return;
dc5bad48 968 }
6fc6879b
JM		 969
970 hdr = (struct ieee802_1x_hdr *) data;
971 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 972 mic = (u8 *) (key + 1);
6fc6879b 973 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 974 key_data = mic + mic_len + 2;
975 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 976 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 977 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
978 MAC2STR(sm->addr), key_info, key->type,
979 (unsigned int) mic_len, key_data_length);
980 wpa_hexdump(MSG_MSGDUMP,
981 "WPA: EAPOL-Key header (ending before Key MIC)",
982 key, sizeof(*key));
983 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
984 mic, mic_len);
5e3b5197 985 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 986 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
987 "key_data overflow (%d > %lu)",
988 key_data_length,
989 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 990 keyhdrlen));
6fc6879b
JM		 991 return;
992 }
993
f8e96eb6 994 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 995 if (key->type == EAPOL_KEY_TYPE_WPA) {
996 /*
997 * Some deployed station implementations seem to send
998 * msg 4/4 with incorrect type value in WPA2 mode.
999 */
1000 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
1001 "with unexpected WPA type in RSN mode");
1002 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 1003 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1004 "unexpected type %d in RSN mode",
1005 key->type);
1006 return;
1007 }
1008 } else {
1009 if (key->type != EAPOL_KEY_TYPE_WPA) {
1010 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
1011 "unexpected type %d in WPA mode",
1012 key->type);
1013 return;
1014 }
1015 }
1016
bc8318ac
JM		 1017 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
1018 WPA_NONCE_LEN);
1019 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
1020 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1021
6fc6879b
JM		 1022 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
1023 * are set */
1024
a0bf1b68
JM		 1025 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1026 wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message");
1027 return;
1028 }
1029
1030 if (key_info & WPA_KEY_INFO_REQUEST) {
6fc6879b
JM		 1031 msg = REQUEST;
1032 msgtxt = "Request";
1033 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1034 msg = GROUP_2;
1035 msgtxt = "2/2 Group";
3b5b7aa8
JM		 1036 } else if (key_data_length == 0 ||
1037 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
1038 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 1039 msg = PAIRWISE_4;
1040 msgtxt = "4/4 Pairwise";
1041 } else {
1042 msg = PAIRWISE_2;
1043 msgtxt = "2/4 Pairwise";
1044 }
1045
6fc6879b
JM		 1046 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1047 msg == GROUP_2) {
1048 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 1049 if (sm->pairwise == WPA_CIPHER_CCMP ||
1050 sm->pairwise == WPA_CIPHER_GCMP) {
4bc801ab
JM		 1051 if (wpa_use_cmac(sm->wpa_key_mgmt) &&
1052 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1053 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1054 wpa_auth_logger(wpa_auth, sm->addr,
1055 LOGGER_WARNING,
1056 "advertised support for "
1057 "AES-128-CMAC, but did not "
1058 "use it");
1059 return;
1060 }
1061
4bc801ab
JM		 1062 if (!wpa_use_cmac(sm->wpa_key_mgmt) &&
1063 !wpa_use_akm_defined(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1064 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1065 wpa_auth_logger(wpa_auth, sm->addr,
1066 LOGGER_WARNING,
1067 "did not use HMAC-SHA1-AES "
eb7719ff 1068 "with CCMP/GCMP");
6fc6879b
JM		 1069 return;
1070 }
1071 }
929a2ea5 1072
4bc801ab 1073 if (wpa_use_akm_defined(sm->wpa_key_mgmt) &&
929a2ea5
JM		 1074 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1075 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1076 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1077 return;
1078 }
6fc6879b
JM		 1079 }
1080
1081 if (key_info & WPA_KEY_INFO_REQUEST) {
1082 if (sm->req_replay_counter_used &&
1083 os_memcmp(key->replay_counter, sm->req_replay_counter,
1084 WPA_REPLAY_COUNTER_LEN) <= 0) {
1085 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1086 "received EAPOL-Key request with "
1087 "replayed counter");
1088 return;
1089 }
1090 }
1091
1092 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1093 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1094 int i;
68921e24
JM		 1095
1096 if (msg == PAIRWISE_2 &&
1097 wpa_replay_counter_valid(sm->prev_key_replay,
1098 key->replay_counter) &&
1099 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1100 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1101 {
1102 /*
1103 * Some supplicant implementations (e.g., Windows XP
1104 * WZC) update SNonce for each EAPOL-Key 2/4. This
1105 * breaks the workaround on accepting any of the
1106 * pending requests, so allow the SNonce to be updated
1107 * even if we have already sent out EAPOL-Key 3/4.
1108 */
1109 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1110 "Process SNonce update from STA "
1111 "based on retransmitted EAPOL-Key "
1112 "1/4");
1113 sm->update_snonce = 1;
f23c5b17
JM		 1114 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1115 sm->alt_snonce_valid = TRUE;
1116 os_memcpy(sm->alt_replay_counter,
1117 sm->key_replay[0].counter,
1118 WPA_REPLAY_COUNTER_LEN);
1119 goto continue_processing;
1120 }
1121
1122 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1123 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1124 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1125 WPA_REPLAY_COUNTER_LEN) == 0) {
1126 /*
1127 * Supplicant may still be using the old SNonce since
1128 * there was two EAPOL-Key 2/4 messages and they had
1129 * different SNonce values.
1130 */
1131 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1132 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1133 goto continue_processing;
1134 }
1135
1136 if (msg == PAIRWISE_2 &&
1137 wpa_replay_counter_valid(sm->prev_key_replay,
1138 key->replay_counter) &&
1139 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1140 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1141 "ignore retransmitted EAPOL-Key %s - "
1142 "SNonce did not change", msgtxt);
1143 } else {
1144 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1145 "received EAPOL-Key %s with "
1146 "unexpected replay counter", msgtxt);
1147 }
22a299ee
JM		 1148 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1149 if (!sm->key_replay[i].valid)
1150 break;
1151 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1152 sm->key_replay[i].counter,
1153 WPA_REPLAY_COUNTER_LEN);
1154 }
6fc6879b
JM		 1155 wpa_hexdump(MSG_DEBUG, "received replay counter",
1156 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1157 return;
1158 }
1159
68921e24 1160continue_processing:
3b5b7aa8
JM		 1161#ifdef CONFIG_FILS
1162 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1163 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1164 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1165 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1166 return;
1167 }
1168#endif /* CONFIG_FILS */
1169
6fc6879b
JM		 1170 switch (msg) {
1171 case PAIRWISE_2:
1172 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1173 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1174 (!sm->update_snonce ||
1175 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1176 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1177 "received EAPOL-Key msg 2/4 in "
1178 "invalid state (%d) - dropped",
1179 sm->wpa_ptk_state);
1180 return;
1181 }
bbb921da 1182 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1183 if (sm->group->reject_4way_hs_for_entropy) {
1184 /*
1185 * The system did not have enough entropy to generate
1186 * strong random numbers. Reject the first 4-way
1187 * handshake(s) and collect some entropy based on the
1188 * information from it. Once enough entropy is
1189 * available, the next atempt will trigger GMK/Key
1190 * Counter update and the station will be allowed to
1191 * continue.
1192 */
1193 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1194 "collect more entropy for random number "
1195 "generation");
08704cd8 1196 random_mark_pool_ready();
567da5bb
JM		 1197 wpa_sta_disconnect(wpa_auth, sm->addr,
1198 WLAN_REASON_PREV_AUTH_NOT_VALID);
08704cd8
JM		 1199 return;
1200 }
6fc6879b
JM		 1201 break;
1202 case PAIRWISE_4:
1203 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1204 !sm->PTK_valid) {
1205 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1206 "received EAPOL-Key msg 4/4 in "
1207 "invalid state (%d) - dropped",
1208 sm->wpa_ptk_state);
1209 return;
1210 }
1211 break;
1212 case GROUP_2:
1213 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1214 || !sm->PTK_valid) {
1215 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1216 "received EAPOL-Key msg 2/2 in "
1217 "invalid state (%d) - dropped",
1218 sm->wpa_ptk_group_state);
1219 return;
1220 }
1221 break;
6fc6879b
JM		 1222 case REQUEST:
1223 break;
1224 }
1225
1226 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1227 "received EAPOL-Key frame (%s)", msgtxt);
1228
1229 if (key_info & WPA_KEY_INFO_ACK) {
1230 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1231 "received invalid EAPOL-Key: Key Ack set");
1232 return;
1233 }
1234
b9866483
JM		 1235 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1236 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1237 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1238 "received invalid EAPOL-Key: Key MIC not set");
1239 return;
1240 }
1241
b9866483
JM		 1242#ifdef CONFIG_FILS
1243 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1244 (key_info & WPA_KEY_INFO_MIC)) {
1245 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1246 "received invalid EAPOL-Key: Key MIC set");
1247 return;
1248 }
1249#endif /* CONFIG_FILS */
1250
6fc6879b 1251 sm->MICVerified = FALSE;
68921e24 1252 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8 1253 if (mic_len &&
567da5bb
JM		 1254 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1255 data, data_len) &&
f23c5b17
JM		 1256 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1257 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1258 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1259 "received EAPOL-Key with invalid MIC");
525923b1
JM		 1260#ifdef TEST_FUZZ
1261 wpa_printf(MSG_INFO,
1262 "TEST: Ignore Key MIC failure for fuzz testing");
1263 goto continue_fuzz;
1264#endif /* TEST_FUZZ */
6fc6879b
JM		 1265 return;
1266 }
75c8563e
JM		 1267#ifdef CONFIG_FILS
1268 if (!mic_len &&
1269 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1270 &key_data_length) < 0) {
1271 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1272 "received EAPOL-Key with invalid MIC");
525923b1
JM		 1273#ifdef TEST_FUZZ
1274 wpa_printf(MSG_INFO,
1275 "TEST: Ignore Key MIC failure for fuzz testing");
1276 goto continue_fuzz;
1277#endif /* TEST_FUZZ */
75c8563e
JM		 1278 return;
1279 }
1280#endif /* CONFIG_FILS */
525923b1
JM		 1281#ifdef TEST_FUZZ
1282 continue_fuzz:
1283#endif /* TEST_FUZZ */
6fc6879b
JM		 1284 sm->MICVerified = TRUE;
1285 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1286 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1287 }
1288
1289 if (key_info & WPA_KEY_INFO_REQUEST) {
1290 if (sm->MICVerified) {
1291 sm->req_replay_counter_used = 1;
1292 os_memcpy(sm->req_replay_counter, key->replay_counter,
1293 WPA_REPLAY_COUNTER_LEN);
1294 } else {
1295 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1296 "received EAPOL-Key request with "
1297 "invalid MIC");
1298 return;
1299 }
1300
1301 /*
1302 * TODO: should decrypt key data field if encryption was used;
1303 * even though MAC address KDE is not normally encrypted,
1304 * supplicant is allowed to encrypt it.
1305 */
a0bf1b68 1306 if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1307 if (wpa_receive_error_report(
1308 wpa_auth, sm,
1309 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1310 return; /* STA entry was removed */
6fc6879b
JM		 1311 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1312 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1313 "received EAPOL-Key Request for new "
1314 "4-Way Handshake");
1315 wpa_request_new_ptk(sm);
6fc6879b 1316 } else if (key_data_length > 0 &&
5e3b5197
JM		 1317 wpa_parse_kde_ies(key_data, key_data_length,
1318 &kde) == 0 &&
6fc6879b
JM		 1319 kde.mac_addr) {
1320 } else {
1321 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1322 "received EAPOL-Key Request for GTK "
1323 "rekeying");
6fc6879b
JM		 1324 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1325 wpa_rekey_gtk(wpa_auth, NULL);
1326 }
1327 } else {
68921e24
JM		 1328 /* Do not allow the same key replay counter to be reused. */
1329 wpa_replay_counter_mark_invalid(sm->key_replay,
1330 key->replay_counter);
1331
1332 if (msg == PAIRWISE_2) {
1333 /*
1334 * Maintain a copy of the pending EAPOL-Key frames in
1335 * case the EAPOL-Key frame was retransmitted. This is
1336 * needed to allow EAPOL-Key msg 2/4 reply to another
1337 * pending msg 1/4 to update the SNonce to work around
1338 * unexpected supplicant behavior.
1339 */
1340 os_memcpy(sm->prev_key_replay, sm->key_replay,
1341 sizeof(sm->key_replay));
1342 } else {
1343 os_memset(sm->prev_key_replay, 0,
1344 sizeof(sm->prev_key_replay));
1345 }
1346
1347 /*
1348 * Make sure old valid counters are not accepted anymore and
1349 * do not get copied again.
1350 */
1351 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1352 }
1353
6fc6879b 1354 os_free(sm->last_rx_eapol_key);
a1f11e34 1355 sm->last_rx_eapol_key = os_memdup(data, data_len);
6fc6879b
JM		 1356 if (sm->last_rx_eapol_key == NULL)
1357 return;
6fc6879b
JM		 1358 sm->last_rx_eapol_key_len = data_len;
1359
0d442aff 1360 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1361 sm->EAPOLKeyReceived = TRUE;
1362 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1363 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1364 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1365 wpa_sm_step(sm);
1366}
1367
1368
3c7302c2
JM		 1369static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1370 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1371{
c6eb3e34 1372 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + WPA_GTK_MAX_LEN];
5cb9d5c3 1373 u8 *pos;
3c7302c2 1374 int ret = 0;
6fc6879b 1375
5cb9d5c3
JM		 1376 /* GTK = PRF-X(GMK, "Group key expansion",
1377 * AA || GNonce || Time || random data)
1378 * The example described in the IEEE 802.11 standard uses only AA and
1379 * GNonce as inputs here. Add some more entropy since this derivation
1380 * is done only at the Authenticator and as such, does not need to be
1381 * exactly same.
1382 */
c6eb3e34 1383 os_memset(data, 0, sizeof(data));
6fc6879b
JM		 1384 os_memcpy(data, addr, ETH_ALEN);
1385 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1386 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1387 wpa_get_ntp_timestamp(pos);
525923b1
JM		 1388#ifdef TEST_FUZZ
1389 os_memset(pos, 0xef, 8);
1390#endif /* TEST_FUZZ */
5cb9d5c3 1391 pos += 8;
c6eb3e34 1392 if (random_get_bytes(pos, gtk_len) < 0)
3c7302c2 1393 ret = -1;
6fc6879b 1394
c6eb3e34
JM		 1395#ifdef CONFIG_SHA384
1396 if (sha384_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1397 gtk, gtk_len) < 0)
3c7302c2 1398 ret = -1;
c6eb3e34
JM		 1399#else /* CONFIG_SHA384 */
1400#ifdef CONFIG_SHA256
1401 if (sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1402 gtk, gtk_len) < 0)
1403 ret = -1;
1404#else /* CONFIG_SHA256 */
1405 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data),
1406 gtk, gtk_len) < 0)
1407 ret = -1;
1408#endif /* CONFIG_SHA256 */
1409#endif /* CONFIG_SHA384 */
3c7302c2 1410
31bc66e4
JM		 1411 forced_memzero(data, sizeof(data));
1412
3c7302c2 1413 return ret;
6fc6879b
JM		 1414}
1415
1416
1417static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1418{
1419 struct wpa_authenticator *wpa_auth = eloop_ctx;
1420 struct wpa_state_machine *sm = timeout_ctx;
1421
e4bf4db9 1422 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1423 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1424 sm->TimeoutEvt = TRUE;
1425 wpa_sm_step(sm);
1426}
1427
1428
1429void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1430 struct wpa_state_machine *sm, int key_info,
1431 const u8 *key_rsc, const u8 *nonce,
1432 const u8 *kde, size_t kde_len,
1433 int keyidx, int encr, int force_version)
1434{
1435 struct ieee802_1x_hdr *hdr;
1436 struct wpa_eapol_key *key;
5e3b5197 1437 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1438 int alg;
1439 int key_data_len, pad_len = 0;
1440 u8 *buf, *pos;
1441 int version, pairwise;
22a299ee 1442 int i;
6d014ffc 1443 u8 *key_mic, *key_data;
6fc6879b 1444
567da5bb 1445 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 1446 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1447
1448 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1449
1450 if (force_version)
1451 version = force_version;
4bc801ab 1452 else if (wpa_use_akm_defined(sm->wpa_key_mgmt))
a14896e8 1453 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
4bc801ab 1454 else if (wpa_use_cmac(sm->wpa_key_mgmt))
6fc6879b 1455 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1456 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1457 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1458 else
1459 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1460
8543ed8a 1461 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1462
1463 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1464 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1465 "encr=%d)",
1466 version,
1467 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1468 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1469 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1470 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1471 pairwise, (unsigned long) kde_len, keyidx, encr);
1472
1473 key_data_len = kde_len;
1474
1475 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1476 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1477 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1478 pad_len = key_data_len % 8;
1479 if (pad_len)
1480 pad_len = 8 - pad_len;
1481 key_data_len += pad_len + 8;
1482 }
1483
1484 len += key_data_len;
b729fd8d
JM		 1485 if (!mic_len && encr)
1486 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1487
1488 hdr = os_zalloc(len);
1489 if (hdr == NULL)
1490 return;
1491 hdr->version = wpa_auth->conf.eapol_version;
1492 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1493 hdr->length = host_to_be16(len - sizeof(*hdr));
1494 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1495 key_mic = (u8 *) (key + 1);
5e3b5197 1496 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1497
1498 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1499 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1500 key_info |= version;
1501 if (encr && sm->wpa == WPA_VERSION_WPA2)
1502 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1503 if (sm->wpa != WPA_VERSION_WPA2)
1504 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1505 WPA_PUT_BE16(key->key_info, key_info);
1506
1507 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
a0bf1b68 1508 if (sm->wpa == WPA_VERSION_WPA2 && !pairwise)
6fc6879b 1509 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1510 else
1511 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b 1512
22a299ee
JM		 1513 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1514 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1515 os_memcpy(sm->key_replay[i].counter,
1516 sm->key_replay[i - 1].counter,
1517 WPA_REPLAY_COUNTER_LEN);
1518 }
1519 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1520 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1521 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1522 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1523 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1524 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1525
1526 if (nonce)
1527 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1528
1529 if (key_rsc)
1530 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1531
1532 if (kde && !encr) {
5e3b5197 1533 os_memcpy(key_data, kde, kde_len);
6d014ffc 1534 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d 1535#ifdef CONFIG_FILS
c05f96a3 1536 } else if (!mic_len && kde) {
b729fd8d
JM		 1537 const u8 *aad[1];
1538 size_t aad_len[1];
1539
1540 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1541 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1542 kde, kde_len);
1543
1544 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1545 sm->PTK.kek, sm->PTK.kek_len);
1546 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1547 * to Key Data (exclusive). */
1548 aad[0] = (u8 *) hdr;
1549 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1550 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1551 1, aad, aad_len, key_mic + 2) < 0) {
1552 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1553 return;
1554 }
1555
1556 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1557 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1558#endif /* CONFIG_FILS */
6fc6879b
JM		 1559 } else if (encr && kde) {
1560 buf = os_zalloc(key_data_len);
1561 if (buf == NULL) {
1562 os_free(hdr);
1563 return;
1564 }
1565 pos = buf;
1566 os_memcpy(pos, kde, kde_len);
1567 pos += kde_len;
1568
1569 if (pad_len)
1570 *pos++ = 0xdd;
1571
1572 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1573 buf, key_data_len);
1574 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
4bc801ab 1575 wpa_use_aes_key_wrap(sm->wpa_key_mgmt) ||
6fc6879b 1576 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
ef9627cb
JM		 1577 wpa_printf(MSG_DEBUG,
1578 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1579 (unsigned int) sm->PTK.kek_len);
98cd3d1c 1580 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1581 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1582 os_free(hdr);
1583 os_free(buf);
1584 return;
1585 }
6d014ffc 1586 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1587#ifndef CONFIG_NO_RC4
98cd3d1c 1588 } else if (sm->PTK.kek_len == 16) {
6fc6879b 1589 u8 ek[32];
ef9627cb
JM		 1590
1591 wpa_printf(MSG_DEBUG,
1592 "WPA: Encrypt Key Data using RC4");
6fc6879b
JM		 1593 os_memcpy(key->key_iv,
1594 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1595 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1596 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1597 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1598 os_memcpy(key_data, buf, key_data_len);
1599 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1600 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1601#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1602 } else {
1603 os_free(hdr);
1604 os_free(buf);
1605 return;
6fc6879b
JM		 1606 }
1607 os_free(buf);
1608 }
1609
1610 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1611 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1612 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1613 "PTK not valid when sending EAPOL-Key "
1614 "frame");
1615 os_free(hdr);
1616 return;
1617 }
5e3b5197 1618
beae255a
JM		 1619 if (wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1620 sm->wpa_key_mgmt, version,
1621 (u8 *) hdr, len, key_mic) < 0) {
1622 os_free(hdr);
1623 return;
1624 }
7af092a0
JB		 1625#ifdef CONFIG_TESTING_OPTIONS
1626 if (!pairwise &&
06df2aa6 1627 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1628 drand48() <
1629 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1630 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1631 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1632 key_mic[0]++;
7af092a0
JB		 1633 }
1634#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1635 }
1636
1637 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1638 1);
1639 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1640 sm->pairwise_set);
1641 os_free(hdr);
1642}
1643
1644
1645static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1646 struct wpa_state_machine *sm, int key_info,
1647 const u8 *key_rsc, const u8 *nonce,
1648 const u8 *kde, size_t kde_len,
1649 int keyidx, int encr)
1650{
1651 int timeout_ms;
1652 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1653 u32 ctr;
6fc6879b
JM		 1654
1655 if (sm == NULL)
1656 return;
1657
1658 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1659 keyidx, encr, 0);
1660
bae61562 1661 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1662 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1663 timeout_ms = pairwise ? eapol_key_timeout_first :
1664 eapol_key_timeout_first_group;
bae61562
JM		 1665 else
1666 timeout_ms = eapol_key_timeout_subseq;
6f234c1e
JM		 1667 if (wpa_auth->conf.wpa_disable_eapol_key_retries &&
1668 (!pairwise || (key_info & WPA_KEY_INFO_MIC)))
1669 timeout_ms = eapol_key_timeout_no_retrans;
e4bf4db9
JM		 1670 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1671 sm->pending_1_of_4_timeout = 1;
525923b1
JM		 1672#ifdef TEST_FUZZ
1673 timeout_ms = 1;
1674#endif /* TEST_FUZZ */
e4bf4db9 1675 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1676 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1677 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1678 wpa_send_eapol_timeout, wpa_auth, sm);
1679}
1680
1681
567da5bb
JM		 1682static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1683 u8 *data, size_t data_len)
6fc6879b
JM		 1684{
1685 struct ieee802_1x_hdr *hdr;
1686 struct wpa_eapol_key *key;
1687 u16 key_info;
1688 int ret = 0;
6d014ffc 1689 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
567da5bb 1690 size_t mic_len = wpa_mic_len(akmp, pmk_len);
6fc6879b
JM		 1691
1692 if (data_len < sizeof(*hdr) + sizeof(*key))
1693 return -1;
1694
1695 hdr = (struct ieee802_1x_hdr *) data;
1696 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1697 mic_pos = (u8 *) (key + 1);
6fc6879b 1698 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1699 os_memcpy(mic, mic_pos, mic_len);
1700 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1701 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1702 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1703 data, data_len, mic_pos) ||
1704 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1705 ret = -1;
6d014ffc 1706 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1707 return ret;
1708}
1709
1710
1711void wpa_remove_ptk(struct wpa_state_machine *sm)
1712{
1713 sm->PTK_valid = FALSE;
1714 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1715 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1716 0))
1717 wpa_printf(MSG_DEBUG,
1718 "RSN: PTK removal from the driver failed");
6fc6879b 1719 sm->pairwise_set = FALSE;
581a8cde 1720 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1721}
1722
1723
bb119228 1724int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1725{
5d22a1d5
JM		 1726 int remove_ptk = 1;
1727
6fc6879b 1728 if (sm == NULL)
6f9b5d16 1729 return -1;
6fc6879b
JM		 1730
1731 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1732 "event %d notification", event);
1733
1734 switch (event) {
1735 case WPA_AUTH:
c50d94f1
BC		 1736#ifdef CONFIG_MESH
1737 /* PTKs are derived through AMPE */
1738 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1739 /* not mesh */
1740 break;
1741 }
1742 return 0;
1743#endif /* CONFIG_MESH */
6fc6879b
JM		 1744 case WPA_ASSOC:
1745 break;
1746 case WPA_DEAUTH:
1747 case WPA_DISASSOC:
1748 sm->DeauthenticationRequest = TRUE;
09ab81b9
JM		 1749#ifdef CONFIG_IEEE80211R_AP
1750 os_memset(sm->PMK, 0, sizeof(sm->PMK));
1751 sm->pmk_len = 0;
1752 os_memset(sm->xxkey, 0, sizeof(sm->xxkey));
1753 sm->xxkey_len = 0;
8a576f5e
JM		 1754 os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1));
1755 sm->pmk_r1_len = 0;
09ab81b9 1756#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1757 break;
1758 case WPA_REAUTH:
1759 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1760 if (!sm->started) {
1761 /*
1762 * When using WPS, we may end up here if the STA
1763 * manages to re-associate without the previous STA
1764 * entry getting removed. Consequently, we need to make
1765 * sure that the WPA state machines gets initialized
1766 * properly at this point.
1767 */
1768 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1769 "started - initialize now");
1770 sm->started = 1;
1771 sm->Init = TRUE;
1772 if (wpa_sm_step(sm) == 1)
1773 return 1; /* should not really happen */
1774 sm->Init = FALSE;
1775 sm->AuthenticationRequest = TRUE;
1776 break;
1777 }
9663596f
JM		 1778 if (sm->GUpdateStationKeys) {
1779 /*
1780 * Reauthentication cancels the pending group key
1781 * update for this STA.
1782 */
1783 sm->group->GKeyDoneStations--;
1784 sm->GUpdateStationKeys = FALSE;
1785 sm->PtkGroupInit = TRUE;
1786 }
6fc6879b
JM		 1787 sm->ReAuthenticationRequest = TRUE;
1788 break;
1789 case WPA_ASSOC_FT:
4ec1fd8e 1790#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1791 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1792 "after association");
1793 wpa_ft_install_ptk(sm);
1794
6fc6879b
JM		 1795 /* Using FT protocol, not WPA auth state machine */
1796 sm->ft_completed = 1;
d178ab0d 1797 wpa_auth_set_ptk_rekey_timer(sm);
6f9b5d16 1798 return 0;
4ec1fd8e 1799#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1800 break;
4ec1fd8e 1801#endif /* CONFIG_IEEE80211R_AP */
957bff83
JM		 1802 case WPA_ASSOC_FILS:
1803#ifdef CONFIG_FILS
1804 wpa_printf(MSG_DEBUG,
1805 "FILS: TK configuration after association");
1806 fils_set_tk(sm);
1807 sm->fils_completed = 1;
1808 return 0;
1809#else /* CONFIG_FILS */
1810 break;
1811#endif /* CONFIG_FILS */
0e3bd7ac
MV		 1812 case WPA_DRV_STA_REMOVED:
1813 sm->tk_already_set = FALSE;
1814 return 0;
6fc6879b
JM		 1815 }
1816
4ec1fd8e 1817#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1818 sm->ft_completed = 0;
4ec1fd8e 1819#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1820
5d22a1d5
JM		 1821 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1822 remove_ptk = 0;
78815f3d 1823#ifdef CONFIG_FILS
da24c5aa
JM		 1824 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1825 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1826 remove_ptk = 0;
1827#endif /* CONFIG_FILS */
6fc6879b 1828
5d22a1d5
JM		 1829 if (remove_ptk) {
1830 sm->PTK_valid = FALSE;
1831 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1832
1833 if (event != WPA_REAUTH_EAPOL)
1834 wpa_remove_ptk(sm);
1835 }
6fc6879b 1836
43f49c37
JM		 1837 if (sm->in_step_loop) {
1838 /*
1839 * wpa_sm_step() is already running - avoid recursive call to
1840 * it by making the existing loop process the new update.
1841 */
1842 sm->changed = TRUE;
1843 return 0;
1844 }
6f9b5d16 1845 return wpa_sm_step(sm);
6fc6879b
JM		 1846}
1847
1848
6fc6879b
JM		 1849SM_STATE(WPA_PTK, INITIALIZE)
1850{
1851 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1852 if (sm->Init) {
1853 /* Init flag is not cleared here, so avoid busy
1854 * loop by claiming nothing changed. */
1855 sm->changed = FALSE;
1856 }
1857
1858 sm->keycount = 0;
1859 if (sm->GUpdateStationKeys)
1860 sm->group->GKeyDoneStations--;
1861 sm->GUpdateStationKeys = FALSE;
1862 if (sm->wpa == WPA_VERSION_WPA)
1863 sm->PInitAKeys = FALSE;
1864 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1865 * Local AA > Remote AA)) */) {
1866 sm->Pair = TRUE;
1867 }
1868 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1869 wpa_remove_ptk(sm);
1870 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1871 sm->TimeoutCtr = 0;
a1ea1b45 1872 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 1873 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 1874 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 1875 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1876 WPA_EAPOL_authorized, 0);
1877 }
1878}
1879
1880
1881SM_STATE(WPA_PTK, DISCONNECT)
1882{
567da5bb
JM		 1883 u16 reason = sm->disconnect_reason;
1884
6fc6879b
JM		 1885 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1886 sm->Disconnect = FALSE;
567da5bb
JM		 1887 sm->disconnect_reason = 0;
1888 if (!reason)
1889 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1890 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
6fc6879b
JM		 1891}
1892
1893
1894SM_STATE(WPA_PTK, DISCONNECTED)
1895{
1896 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1897 sm->DeauthenticationRequest = FALSE;
1898}
1899
1900
1901SM_STATE(WPA_PTK, AUTHENTICATION)
1902{
1903 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1904 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1905 sm->PTK_valid = FALSE;
1906 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1907 1);
1908 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1909 sm->AuthenticationRequest = FALSE;
1910}
1911
1912
40d00d2b
NC		 1913static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1914 struct wpa_group *group)
1bdb7ab3 1915{
40d00d2b
NC		 1916 if (group->first_sta_seen)
1917 return;
1bdb7ab3
JM		 1918 /*
1919 * System has run bit further than at the time hostapd was started
1920 * potentially very early during boot up. This provides better chances
1921 * of collecting more randomness on embedded systems. Re-initialize the
1922 * GMK and Counter here to improve their strength if there was not
1923 * enough entropy available immediately after system startup.
1924 */
1925 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1926 "station");
08704cd8
JM		 1927 if (random_pool_ready() != 1) {
1928 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1929 "to proceed - reject first 4-way handshake");
1930 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1931 } else {
1932 group->first_sta_seen = TRUE;
1933 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1934 }
40d00d2b 1935
aac1efec
JM		 1936 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1937 wpa_gtk_update(wpa_auth, group) < 0 ||
1938 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1939 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1940 group->first_sta_seen = FALSE;
1941 group->reject_4way_hs_for_entropy = TRUE;
1942 }
1bdb7ab3
JM		 1943}
1944
1945
6fc6879b
JM		 1946SM_STATE(WPA_PTK, AUTHENTICATION2)
1947{
1948 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1949
40d00d2b 1950 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1951 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1952
3825a19b
JM		 1953 /*
1954 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1955 * ambiguous. The Authenticator state machine uses a counter that is
1956 * incremented by one for each 4-way handshake. However, the security
1957 * analysis of 4-way handshake points out that unpredictable nonces
1958 * help in preventing precomputation attacks. Instead of the state
1959 * machine definition, use an unpredictable nonce value here to provide
1960 * stronger protection against potential precomputation attacks.
1961 */
1962 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1963 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1964 "ANonce.");
65a32cdb 1965 sm->Disconnect = TRUE;
3825a19b
JM		 1966 return;
1967 }
bc8318ac
JM		 1968 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1969 WPA_NONCE_LEN);
6fc6879b
JM		 1970 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1971 * logical place than INITIALIZE since AUTHENTICATION2 can be
1972 * re-entered on ReAuthenticationRequest without going through
1973 * INITIALIZE. */
1974 sm->TimeoutCtr = 0;
1975}
1976
1977
0adc9b28
JM		 1978static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1979{
1980 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1981 wpa_printf(MSG_ERROR,
1982 "WPA: Failed to get random data for ANonce");
1983 sm->Disconnect = TRUE;
1984 return -1;
1985 }
1986 wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1987 WPA_NONCE_LEN);
1988 sm->TimeoutCtr = 0;
1989 return 0;
1990}
1991
1992
6fc6879b
JM		 1993SM_STATE(WPA_PTK, INITPMK)
1994{
1995 u8 msk[2 * PMK_LEN];
1996 size_t len = 2 * PMK_LEN;
1997
1998 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1999#ifdef CONFIG_IEEE80211R_AP
6fc6879b 2000 sm->xxkey_len = 0;
4ec1fd8e 2001#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2002 if (sm->pmksa) {
2003 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 2004 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2005 sm->pmk_len = sm->pmksa->pmk_len;
567da5bb
JM		 2006#ifdef CONFIG_DPP
2007 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
2008 wpa_printf(MSG_DEBUG,
2009 "DPP: No PMKSA cache entry for STA - reject connection");
2010 sm->Disconnect = TRUE;
2011 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
2012 return;
2013#endif /* CONFIG_DPP */
6fc6879b 2014 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 2015 unsigned int pmk_len;
2016
834c5d68 2017 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
207976f0
JM		 2018 pmk_len = PMK_LEN_SUITE_B_192;
2019 else
2020 pmk_len = PMK_LEN;
6fc6879b 2021 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 2022 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
2023 pmk_len);
2024 if (len < pmk_len) {
2025 wpa_printf(MSG_DEBUG,
2026 "WPA: MSK not long enough (%u) to create PMK (%u)",
2027 (unsigned int) len, (unsigned int) pmk_len);
2028 sm->Disconnect = TRUE;
2029 return;
2030 }
2031 os_memcpy(sm->PMK, msk, pmk_len);
2032 sm->pmk_len = pmk_len;
4ec1fd8e 2033#ifdef CONFIG_IEEE80211R_AP
6fc6879b 2034 if (len >= 2 * PMK_LEN) {
9f12271b
JM		 2035 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
2036 os_memcpy(sm->xxkey, msk, SHA384_MAC_LEN);
2037 sm->xxkey_len = SHA384_MAC_LEN;
2038 } else {
2039 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
2040 sm->xxkey_len = PMK_LEN;
2041 }
6fc6879b 2042 }
4ec1fd8e 2043#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2044 } else {
400de9b1 2045 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 2046 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 2047 sm->Disconnect = TRUE;
2048 return;
6fc6879b 2049 }
31bc66e4 2050 forced_memzero(msk, sizeof(msk));
6fc6879b
JM		 2051
2052 sm->req_replay_counter_used = 0;
2053 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
2054 * will break reauthentication since EAPOL state machines may not be
2055 * get into AUTHENTICATING state that clears keyRun before WPA state
2056 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
2057 * state and takes PMK from the previously used AAA Key. This will
2058 * eventually fail in 4-Way Handshake because Supplicant uses PMK
2059 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
2060 * be good workaround for this issue. */
2061 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
2062}
2063
2064
2065SM_STATE(WPA_PTK, INITPSK)
2066{
2067 const u8 *psk;
7a12edd1
JM		 2068 size_t psk_len;
2069
6fc6879b 2070 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
7a12edd1 2071 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
dbfa691d 2072 &psk_len, NULL);
6fc6879b 2073 if (psk) {
7a12edd1
JM		 2074 os_memcpy(sm->PMK, psk, psk_len);
2075 sm->pmk_len = psk_len;
4ec1fd8e 2076#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 2077 os_memcpy(sm->xxkey, psk, PMK_LEN);
2078 sm->xxkey_len = PMK_LEN;
4ec1fd8e 2079#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2080 }
e61fea6b
JM		 2081#ifdef CONFIG_SAE
2082 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2083 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2084 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2085 sm->pmk_len = sm->pmksa->pmk_len;
6fe3f0f7 2086#ifdef CONFIG_IEEE80211R_AP
2087 os_memcpy(sm->xxkey, sm->pmksa->pmk, sm->pmksa->pmk_len);
2088 sm->xxkey_len = sm->pmksa->pmk_len;
2089#endif /* CONFIG_IEEE80211R_AP */
e61fea6b
JM		 2090 }
2091#endif /* CONFIG_SAE */
6fc6879b
JM		 2092 sm->req_replay_counter_used = 0;
2093}
2094
2095
2096SM_STATE(WPA_PTK, PTKSTART)
2097{
2098 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2099 size_t pmkid_len = 0;
2100
2101 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2102 sm->PTKRequest = FALSE;
2103 sm->TimeoutEvt = FALSE;
f23c5b17 2104 sm->alt_snonce_valid = FALSE;
bae61562
JM		 2105
2106 sm->TimeoutCtr++;
41f140d3 2107 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2108 /* No point in sending the EAPOL-Key - we will disconnect
2109 * immediately following this. */
2110 return;
2111 }
2112
6fc6879b
JM		 2113 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2114 "sending 1/4 msg of 4-Way Handshake");
2115 /*
c6e1a9a0
JM		 2116 * For infrastructure BSS cases, it is better for the AP not to include
2117 * the PMKID KDE in EAPOL-Key msg 1/4 since it could be used to initiate
2118 * offline search for the passphrase/PSK without having to be able to
2119 * capture a 4-way handshake from a STA that has access to the network.
2120 *
2121 * For IBSS cases, addition of PMKID KDE could be considered even with
2122 * WPA2-PSK cases that use multiple PSKs, but only if there is a single
2123 * possible PSK for this STA. However, this should not be done unless
2124 * there is support for using that information on the supplicant side.
2125 * The concern about exposing PMKID unnecessarily in infrastructure BSS
2126 * cases would also apply here, but at least in the IBSS case, this
2127 * would cover a potential real use case.
6fc6879b
JM		 2128 */
2129 if (sm->wpa == WPA_VERSION_WPA2 &&
e61fea6b 2130 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
d90f10fa 2131 (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
e61fea6b 2132 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
a14896e8 2133 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2134 pmkid = buf;
2135 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2136 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2137 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2138 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2139 if (sm->pmksa) {
9d94e4bb
JM		 2140 wpa_hexdump(MSG_DEBUG,
2141 "RSN: Message 1/4 PMKID from PMKSA entry",
2142 sm->pmksa->pmkid, PMKID_LEN);
6fc6879b
JM		 2143 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2144 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2145 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2146 /* No KCK available to derive PMKID */
9d94e4bb
JM		 2147 wpa_printf(MSG_DEBUG,
2148 "RSN: No KCK available to derive PMKID for message 1/4");
929a2ea5 2149 pmkid = NULL;
a40bd06e
JM		 2150#ifdef CONFIG_FILS
2151 } else if (wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2152 if (sm->pmkid_set) {
2153 wpa_hexdump(MSG_DEBUG,
2154 "RSN: Message 1/4 PMKID from FILS/ERP",
2155 sm->pmkid, PMKID_LEN);
2156 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2157 sm->pmkid, PMKID_LEN);
2158 } else {
2159 /* No PMKID available */
2160 wpa_printf(MSG_DEBUG,
2161 "RSN: No FILS/ERP PMKID available for message 1/4");
2162 pmkid = NULL;
2163 }
2164#endif /* CONFIG_FILS */
fb1dee22
JM		 2165#ifdef CONFIG_IEEE80211R_AP
2166 } else if (wpa_key_mgmt_ft(sm->wpa_key_mgmt) &&
2167 sm->ft_completed) {
2168 wpa_printf(MSG_DEBUG,
2169 "FT: No PMKID in message 1/4 when using FT protocol");
2170 pmkid = NULL;
2171 pmkid_len = 0;
2172#endif /* CONFIG_IEEE80211R_AP */
9d94e4bb
JM		 2173#ifdef CONFIG_SAE
2174 } else if (wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
2175 if (sm->pmkid_set) {
2176 wpa_hexdump(MSG_DEBUG,
2177 "RSN: Message 1/4 PMKID from SAE",
2178 sm->pmkid, PMKID_LEN);
2179 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2180 sm->pmkid, PMKID_LEN);
2181 } else {
2182 /* No PMKID available */
2183 wpa_printf(MSG_DEBUG,
2184 "RSN: No SAE PMKID available for message 1/4");
2185 pmkid = NULL;
2186 }
2187#endif /* CONFIG_SAE */
929a2ea5 2188 } else {
6fc6879b
JM		 2189 /*
2190 * Calculate PMKID since no PMKSA cache entry was
2191 * available with pre-calculated PMKID.
2192 */
207976f0 2193 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197 2194 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
41b81914 2195 sm->wpa_key_mgmt);
9d94e4bb
JM		 2196 wpa_hexdump(MSG_DEBUG,
2197 "RSN: Message 1/4 PMKID derived from PMK",
2198 &pmkid[2 + RSN_SELECTOR_LEN], PMKID_LEN);
6fc6879b
JM		 2199 }
2200 }
2201 wpa_send_eapol(sm->wpa_auth, sm,
2202 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2203 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2204}
2205
2206
f23c5b17 2207static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2208 const u8 *pmk, unsigned int pmk_len,
2209 struct wpa_ptk *ptk)
6fc6879b 2210{
10ec6a5f
JM		 2211 const u8 *z = NULL;
2212 size_t z_len = 0;
2213
4ec1fd8e 2214#ifdef CONFIG_IEEE80211R_AP
b583ed38
JM		 2215 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2216 if (sm->ft_completed) {
2217 u8 ptk_name[WPA_PMK_NAME_LEN];
2218
2219 return wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->pmk_r1_len,
2220 sm->SNonce, sm->ANonce,
2221 sm->addr, sm->wpa_auth->addr,
2222 sm->pmk_r1_name,
2223 ptk, ptk_name,
2224 sm->wpa_key_mgmt,
2225 sm->pairwise);
2226 }
267c366f 2227 return wpa_auth_derive_ptk_ft(sm, ptk);
b583ed38 2228 }
4ec1fd8e 2229#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2230
10ec6a5f
JM		 2231#ifdef CONFIG_DPP2
2232 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) {
2233 z = wpabuf_head(sm->dpp_z);
2234 z_len = wpabuf_len(sm->dpp_z);
2235 }
2236#endif /* CONFIG_DPP2 */
2237
207976f0 2238 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c 2239 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
10ec6a5f 2240 ptk, sm->wpa_key_mgmt, sm->pairwise, z, z_len);
6fc6879b
JM		 2241}
2242
2243
3b5b7aa8 2244#ifdef CONFIG_FILS
c4fd6d8a
JM		 2245
2246int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
80ddf5d9 2247 size_t pmk_len, const u8 *snonce, const u8 *anonce,
4cada9dc 2248 const u8 *dhss, size_t dhss_len,
80ddf5d9 2249 struct wpabuf *g_sta, struct wpabuf *g_ap)
c4fd6d8a
JM		 2250{
2251 u8 ick[FILS_ICK_MAX_LEN];
2252 size_t ick_len;
2253 int res;
8fed47e0
JM		 2254 u8 fils_ft[FILS_FT_MAX_LEN];
2255 size_t fils_ft_len = 0;
c4fd6d8a
JM		 2256
2257 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
4cada9dc
JM		 2258 snonce, anonce, dhss, dhss_len,
2259 &sm->PTK, ick, &ick_len,
8fed47e0
JM		 2260 sm->wpa_key_mgmt, sm->pairwise,
2261 fils_ft, &fils_ft_len);
c4fd6d8a
JM		 2262 if (res < 0)
2263 return res;
2264 sm->PTK_valid = TRUE;
2f1357fb 2265 sm->tk_already_set = FALSE;
c4fd6d8a 2266
8fed47e0
JM		 2267#ifdef CONFIG_IEEE80211R_AP
2268 if (fils_ft_len) {
2269 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2270 struct wpa_auth_config *conf = &wpa_auth->conf;
994eac7e
JM		 2271 u8 pmk_r0[PMK_LEN_MAX], pmk_r0_name[WPA_PMK_NAME_LEN];
2272 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
2273 size_t pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN;
8fed47e0
JM		 2274
2275 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2276 conf->ssid, conf->ssid_len,
2277 conf->mobility_domain,
2278 conf->r0_key_holder,
2279 conf->r0_key_holder_len,
994eac7e
JM		 2280 sm->addr, pmk_r0, pmk_r0_name,
2281 use_sha384) < 0)
8fed47e0
JM		 2282 return -1;
2283
994eac7e
JM		 2284 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0",
2285 pmk_r0, pmk_r0_len);
8fed47e0
JM		 2286 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2287 pmk_r0_name, WPA_PMK_NAME_LEN);
89dea17e 2288 wpa_ft_store_pmk_fils(sm, pmk_r0, pmk_r0_name);
31bc66e4 2289 forced_memzero(fils_ft, sizeof(fils_ft));
36536639
JM		 2290
2291 res = wpa_derive_pmk_r1_name(pmk_r0_name, conf->r1_key_holder,
2292 sm->addr, sm->pmk_r1_name,
2293 use_sha384);
31bc66e4 2294 forced_memzero(pmk_r0, PMK_LEN_MAX);
36536639
JM		 2295 if (res < 0)
2296 return -1;
2297 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name,
2298 WPA_PMK_NAME_LEN);
2299 sm->pmk_r1_name_valid = 1;
8fed47e0
JM		 2300 }
2301#endif /* CONFIG_IEEE80211R_AP */
2302
c4fd6d8a
JM		 2303 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2304 sm->addr, sm->wpa_auth->addr,
80ddf5d9
JM		 2305 g_sta ? wpabuf_head(g_sta) : NULL,
2306 g_sta ? wpabuf_len(g_sta) : 0,
2307 g_ap ? wpabuf_head(g_ap) : NULL,
2308 g_ap ? wpabuf_len(g_ap) : 0,
c4fd6d8a
JM		 2309 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2310 sm->fils_key_auth_ap,
2311 &sm->fils_key_auth_len);
31bc66e4 2312 forced_memzero(ick, sizeof(ick));
78815f3d
JM		 2313
2314 /* Store nonces for (Re)Association Request/Response frame processing */
2315 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2316 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2317
c4fd6d8a
JM		 2318 return res;
2319}
2320
2321
3b5b7aa8 2322static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2323 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2324{
2325 struct ieee802_1x_hdr *hdr;
2326 struct wpa_eapol_key *key;
2327 u8 *pos;
2328 u16 key_data_len;
2329 u8 *tmp;
2330 const u8 *aad[1];
2331 size_t aad_len[1];
2332
75c8563e 2333 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2334 key = (struct wpa_eapol_key *) (hdr + 1);
2335 pos = (u8 *) (key + 1);
2336 key_data_len = WPA_GET_BE16(pos);
2337 if (key_data_len < AES_BLOCK_SIZE ||
2338 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2339 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2340 "No room for AES-SIV data in the frame");
2341 return -1;
2342 }
2343 pos += 2; /* Pointing at the Encrypted Key Data field */
2344
2345 tmp = os_malloc(key_data_len);
2346 if (!tmp)
2347 return -1;
2348
2349 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2350 * to Key Data (exclusive). */
75c8563e
JM		 2351 aad[0] = buf;
2352 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2353 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2354 1, aad, aad_len, tmp) < 0) {
2355 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2356 "Invalid AES-SIV data in the frame");
2357 bin_clear_free(tmp, key_data_len);
2358 return -1;
2359 }
2360
2361 /* AEAD decryption and validation completed successfully */
2362 key_data_len -= AES_BLOCK_SIZE;
2363 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2364 tmp, key_data_len);
2365
2366 /* Replace Key Data field with the decrypted version */
2367 os_memcpy(pos, tmp, key_data_len);
2368 pos -= 2; /* Key Data Length field */
2369 WPA_PUT_BE16(pos, key_data_len);
2370 bin_clear_free(tmp, key_data_len);
2371 if (_key_data_len)
2372 *_key_data_len = key_data_len;
2373 return 0;
2374}
78815f3d
JM		 2375
2376
087631b9
JM		 2377const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2378 const u8 *ies, size_t ies_len,
2379 const u8 *fils_session)
2380{
2381 const u8 *ie, *end;
2382 const u8 *session = NULL;
2383
2384 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2385 wpa_printf(MSG_DEBUG,
2386 "FILS: Not a FILS AKM - reject association");
2387 return NULL;
2388 }
2389
2390 /* Verify Session element */
2391 ie = ies;
2392 end = ((const u8 *) ie) + ies_len;
2393 while (ie + 1 < end) {
2394 if (ie + 2 + ie[1] > end)
2395 break;
2396 if (ie[0] == WLAN_EID_EXTENSION &&
2397 ie[1] >= 1 + FILS_SESSION_LEN &&
2398 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2399 session = ie;
2400 break;
2401 }
2402 ie += 2 + ie[1];
2403 }
2404
2405 if (!session) {
2406 wpa_printf(MSG_DEBUG,
2407 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2408 __func__);
2409 return NULL;
2410 }
2411
2412 if (!fils_session) {
2413 wpa_printf(MSG_DEBUG,
2414 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2415 __func__);
2416 return NULL;
2417 }
2418
2419 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2420 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2421 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2422 fils_session, FILS_SESSION_LEN);
2423 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2424 session + 3, FILS_SESSION_LEN);
2425 return NULL;
2426 }
2427 return session;
2428}
2429
2430
bd599353
JM		 2431int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2432 size_t ies_len)
2433{
2434 struct ieee802_11_elems elems;
2435
2436 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2437 wpa_printf(MSG_DEBUG,
2438 "FILS: Failed to parse decrypted elements");
2439 return -1;
2440 }
2441
8b5ddda5
JM		 2442 if (!elems.fils_session) {
2443 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2444 return -1;
2445 }
2446
bd599353
JM		 2447 if (!elems.fils_key_confirm) {
2448 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2449 return -1;
2450 }
2451
2452 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2453 wpa_printf(MSG_DEBUG,
2454 "FILS: Unexpected Key-Auth length %d (expected %d)",
2455 elems.fils_key_confirm_len,
2456 (int) sm->fils_key_auth_len);
2457 return -1;
2458 }
2459
2460 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2461 sm->fils_key_auth_len) != 0) {
2462 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2463 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2464 elems.fils_key_confirm, elems.fils_key_confirm_len);
2465 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2466 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2467 return -1;
2468 }
2469
2470 return 0;
2471}
2472
2473
78815f3d
JM		 2474int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2475 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2476 u8 *pos, size_t left)
2477{
2478 u16 fc, stype;
2479 const u8 *end, *ie_start, *ie, *session, *crypt;
78815f3d
JM		 2480 const u8 *aad[5];
2481 size_t aad_len[5];
2482
2483 if (!sm || !sm->PTK_valid) {
2484 wpa_printf(MSG_DEBUG,
2485 "FILS: No KEK to decrypt Assocication Request frame");
2486 return -1;
2487 }
2488
2489 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2490 wpa_printf(MSG_DEBUG,
2491 "FILS: Not a FILS AKM - reject association");
2492 return -1;
2493 }
2494
2495 end = ((const u8 *) mgmt) + frame_len;
2496 fc = le_to_host16(mgmt->frame_control);
2497 stype = WLAN_FC_GET_STYPE(fc);
2498 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2499 ie_start = mgmt->u.reassoc_req.variable;
2500 else
2501 ie_start = mgmt->u.assoc_req.variable;
2502 ie = ie_start;
2503
2504 /*
2505 * Find FILS Session element which is the last unencrypted element in
2506 * the frame.
2507 */
087631b9
JM		 2508 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2509 fils_session);
78815f3d 2510 if (!session) {
087631b9 2511 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
78815f3d
JM		 2512 return -1;
2513 }
087631b9 2514
78815f3d
JM		 2515 crypt = session + 2 + session[1];
2516
2517 if (end - crypt < AES_BLOCK_SIZE) {
2518 wpa_printf(MSG_DEBUG,
2519 "FILS: Too short frame to include AES-SIV data");
2520 return -1;
2521 }
2522
2523 /* AES-SIV AAD vectors */
2524
2525 /* The STA's MAC address */
2526 aad[0] = mgmt->sa;
2527 aad_len[0] = ETH_ALEN;
2528 /* The AP's BSSID */
2529 aad[1] = mgmt->da;
2530 aad_len[1] = ETH_ALEN;
2531 /* The STA's nonce */
2532 aad[2] = sm->SNonce;
2533 aad_len[2] = FILS_NONCE_LEN;
2534 /* The AP's nonce */
2535 aad[3] = sm->ANonce;
2536 aad_len[3] = FILS_NONCE_LEN;
2537 /*
2538 * The (Re)Association Request frame from the Capability Information
2539 * field to the FILS Session element (both inclusive).
2540 */
2541 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2542 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2543
2544 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2545 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2546 wpa_printf(MSG_DEBUG,
2547 "FILS: Invalid AES-SIV data in the frame");
2548 return -1;
2549 }
2550 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2551 pos, left - AES_BLOCK_SIZE);
2552
bd599353
JM		 2553 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2554 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
78815f3d
JM		 2555 return -1;
2556 }
2557
2558 return left - AES_BLOCK_SIZE;
2559}
2560
e73ffa09
JM		 2561
2562int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2563 size_t current_len, size_t max_len,
2564 const struct wpabuf *hlp)
e73ffa09
JM		 2565{
2566 u8 *end = buf + max_len;
2567 u8 *pos = buf + current_len;
2568 struct ieee80211_mgmt *mgmt;
2569 struct wpabuf *plain;
e73ffa09
JM		 2570 const u8 *aad[5];
2571 size_t aad_len[5];
2572
2573 if (!sm || !sm->PTK_valid)
2574 return -1;
2575
2576 wpa_hexdump(MSG_DEBUG,
2577 "FILS: Association Response frame before FILS processing",
2578 buf, current_len);
2579
2580 mgmt = (struct ieee80211_mgmt *) buf;
2581
2582 /* AES-SIV AAD vectors */
2583
2584 /* The AP's BSSID */
2585 aad[0] = mgmt->sa;
2586 aad_len[0] = ETH_ALEN;
2587 /* The STA's MAC address */
2588 aad[1] = mgmt->da;
2589 aad_len[1] = ETH_ALEN;
2590 /* The AP's nonce */
2591 aad[2] = sm->ANonce;
2592 aad_len[2] = FILS_NONCE_LEN;
2593 /* The STA's nonce */
2594 aad[3] = sm->SNonce;
2595 aad_len[3] = FILS_NONCE_LEN;
2596 /*
2597 * The (Re)Association Response frame from the Capability Information
2598 * field (the same offset in both Association and Reassociation
2599 * Response frames) to the FILS Session element (both inclusive).
2600 */
2601 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2602 aad_len[4] = pos - aad[4];
2603
2604 /* The following elements will be encrypted with AES-SIV */
9392859d
JM		 2605 plain = fils_prepare_plainbuf(sm, hlp);
2606 if (!plain) {
2607 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2608 return -1;
2609 }
2610
2611 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2612 wpa_printf(MSG_DEBUG,
2613 "FILS: Not enough room for FILS elements");
ce362f88 2614 wpabuf_clear_free(plain);
9392859d
JM		 2615 return -1;
2616 }
2617
2618 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2619 plain);
2620
2621 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2622 wpabuf_head(plain), wpabuf_len(plain),
2623 5, aad, aad_len, pos) < 0) {
ce362f88 2624 wpabuf_clear_free(plain);
9392859d
JM		 2625 return -1;
2626 }
2627
2628 wpa_hexdump(MSG_DEBUG,
2629 "FILS: Encrypted Association Response elements",
2630 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2631 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
ce362f88 2632 wpabuf_clear_free(plain);
9392859d
JM		 2633
2634 sm->fils_completed = 1;
2635
2636 return current_len;
2637}
2638
2639
2640static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2641 const struct wpabuf *hlp)
2642{
2643 struct wpabuf *plain;
2644 u8 *len, *tmp, *tmp2;
2645 u8 hdr[2];
2646 u8 *gtk, dummy_gtk[32];
2647 size_t gtk_len;
2648 struct wpa_group *gsm;
e73ffa09
JM		 2649
2650 plain = wpabuf_alloc(1000);
2651 if (!plain)
9392859d 2652 return NULL;
e73ffa09
JM		 2653
2654 /* TODO: FILS Public Key */
2655
2656 /* FILS Key Confirmation */
2657 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2658 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2659 /* Element ID Extension */
2660 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2661 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2662
91d91abf
JM		 2663 /* FILS HLP Container */
2664 if (hlp)
2665 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2666
2667 /* TODO: FILS IP Address Assignment */
2668
2669 /* Key Delivery */
2670 gsm = sm->group;
2671 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2672 len = wpabuf_put(plain, 1);
2673 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2674 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2675 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2676 /* GTK KDE */
2677 gtk = gsm->GTK[gsm->GN - 1];
2678 gtk_len = gsm->GTK_len;
8d660a4b
JM		 2679 if (sm->wpa_auth->conf.disable_gtk ||
2680 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
e73ffa09
JM		 2681 /*
2682 * Provide unique random GTK to each STA to prevent use
2683 * of GTK in the BSS.
2684 */
2685 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
ce362f88 2686 wpabuf_clear_free(plain);
9392859d 2687 return NULL;
e73ffa09
JM		 2688 }
2689 gtk = dummy_gtk;
2690 }
2691 hdr[0] = gsm->GN & 0x03;
2692 hdr[1] = 0;
2693 tmp = wpabuf_put(plain, 0);
2694 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2695 gtk, gtk_len);
2696 wpabuf_put(plain, tmp2 - tmp);
2697
2698 /* IGTK KDE */
2699 tmp = wpabuf_put(plain, 0);
2700 tmp2 = ieee80211w_kde_add(sm, tmp);
2701 wpabuf_put(plain, tmp2 - tmp);
2702
2703 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
99621dc1
MV		 2704
2705#ifdef CONFIG_OCV
2706 if (wpa_auth_uses_ocv(sm)) {
2707 struct wpa_channel_info ci;
2708 u8 *pos;
2709
2710 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
2711 wpa_printf(MSG_WARNING,
2712 "FILS: Failed to get channel info for OCI element");
ce362f88 2713 wpabuf_clear_free(plain);
99621dc1
MV		 2714 return NULL;
2715 }
2716
2717 pos = wpabuf_put(plain, OCV_OCI_EXTENDED_LEN);
2718 if (ocv_insert_extended_oci(&ci, pos) < 0) {
ce362f88 2719 wpabuf_clear_free(plain);
99621dc1
MV		 2720 return NULL;
2721 }
2722 }
2723#endif /* CONFIG_OCV */
2724
9392859d 2725 return plain;
e73ffa09
JM		 2726}
2727
da24c5aa
JM		 2728
2729int fils_set_tk(struct wpa_state_machine *sm)
2730{
2731 enum wpa_alg alg;
2732 int klen;
2733
2f1357fb
JM		 2734 if (!sm || !sm->PTK_valid) {
2735 wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK");
2736 return -1;
2737 }
2738 if (sm->tk_already_set) {
2739 wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver");
da24c5aa 2740 return -1;
2f1357fb 2741 }
da24c5aa
JM		 2742
2743 alg = wpa_cipher_to_alg(sm->pairwise);
2744 klen = wpa_cipher_key_len(sm->pairwise);
2745
2746 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2747 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2748 sm->PTK.tk, klen)) {
2749 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2750 return -1;
2751 }
2f1357fb 2752 sm->tk_already_set = TRUE;
da24c5aa
JM		 2753
2754 return 0;
2755}
2756
fa61bff6
JM		 2757
2758u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
8b5ddda5 2759 const u8 *fils_session, struct wpabuf *hlp)
fa61bff6
JM		 2760{
2761 struct wpabuf *plain;
2762 u8 *pos = buf;
2763
2764 /* FILS Session */
2765 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2766 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2767 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2768 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2769 pos += FILS_SESSION_LEN;
2770
8b5ddda5 2771 plain = fils_prepare_plainbuf(sm, hlp);
fa61bff6
JM		 2772 if (!plain) {
2773 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2774 return NULL;
2775 }
2776
2777 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2778 pos += wpabuf_len(plain);
2779
2780 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2781 (unsigned int) wpabuf_len(plain));
ce362f88 2782 wpabuf_clear_free(plain);
fa61bff6
JM		 2783 sm->fils_completed = 1;
2784 return pos;
2785}
2786
3b5b7aa8
JM		 2787#endif /* CONFIG_FILS */
2788
2789
1034f67b
MV		 2790#ifdef CONFIG_OCV
2791int get_sta_tx_parameters(struct wpa_state_machine *sm, int ap_max_chanwidth,
2792 int ap_seg1_idx, int *bandwidth, int *seg1_idx)
2793{
2794 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2795
2796 if (!wpa_auth->cb->get_sta_tx_params)
2797 return -1;
2798 return wpa_auth->cb->get_sta_tx_params(wpa_auth->cb_ctx, sm->addr,
2799 ap_max_chanwidth, ap_seg1_idx,
2800 bandwidth, seg1_idx);
2801}
2802#endif /* CONFIG_OCV */
2803
2804
6fc6879b
JM		 2805SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2806{
3b5b7aa8 2807 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2808 struct wpa_ptk PTK;
2c502460 2809 int ok = 0, psk_found = 0;
6fc6879b 2810 const u8 *pmk = NULL;
7a12edd1 2811 size_t pmk_len;
3b5b7aa8
JM		 2812 int ft;
2813 const u8 *eapol_key_ie, *key_data, *mic;
2814 u16 key_data_length;
2815 size_t mic_len, eapol_key_ie_len;
2816 struct ieee802_1x_hdr *hdr;
2817 struct wpa_eapol_key *key;
2818 struct wpa_eapol_ie_parse kde;
bb05d036 2819 int vlan_id = 0;
6fc6879b
JM		 2820
2821 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2822 sm->EAPOLKeyReceived = FALSE;
68921e24 2823 sm->update_snonce = FALSE;
b729fd8d 2824 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2825
567da5bb 2826 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3b5b7aa8 2827
6fc6879b
JM		 2828 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2829 * WPA-PSK: iterate through possible PSKs and select the one matching
2830 * the packet */
2831 for (;;) {
e61fea6b
JM		 2832 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2833 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
759fd76b 2834 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
dbfa691d
JM		 2835 sm->p2p_dev_addr, pmk, &pmk_len,
2836 &vlan_id);
6fc6879b
JM		 2837 if (pmk == NULL)
2838 break;
2c502460 2839 psk_found = 1;
f9854c18
MK		 2840#ifdef CONFIG_IEEE80211R_AP
2841 if (wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
2842 os_memcpy(sm->xxkey, pmk, pmk_len);
2843 sm->xxkey_len = pmk_len;
2844 }
2845#endif /* CONFIG_IEEE80211R_AP */
207976f0 2846 } else {
6fc6879b 2847 pmk = sm->PMK;
207976f0
JM		 2848 pmk_len = sm->pmk_len;
2849 }
6fc6879b 2850
a40bd06e
JM		 2851 if ((!pmk || !pmk_len) && sm->pmksa) {
2852 wpa_printf(MSG_DEBUG, "WPA: Use PMK from PMKSA cache");
2853 pmk = sm->pmksa->pmk;
2854 pmk_len = sm->pmksa->pmk_len;
2855 }
2856
364c064a
JM		 2857 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2858 break;
6fc6879b 2859
3b5b7aa8 2860 if (mic_len &&
567da5bb 2861 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
929a2ea5 2862 sm->last_rx_eapol_key,
6fc6879b 2863 sm->last_rx_eapol_key_len) == 0) {
08dc8efd
JM		 2864 if (sm->PMK != pmk) {
2865 os_memcpy(sm->PMK, pmk, pmk_len);
2866 sm->pmk_len = pmk_len;
2867 }
6fc6879b
JM		 2868 ok = 1;
2869 break;
2870 }
2871
3b5b7aa8 2872#ifdef CONFIG_FILS
75c8563e
JM		 2873 if (!mic_len &&
2874 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2875 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2876 ok = 1;
2877 break;
2878 }
2879#endif /* CONFIG_FILS */
2880
f5e0a332
JM		 2881 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
2882 wpa_key_mgmt_sae(sm->wpa_key_mgmt))
6fc6879b
JM		 2883 break;
2884 }
2885
2886 if (!ok) {
2887 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2888 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2889 if (psk_found)
2890 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2891 return;
2892 }
2893
3b5b7aa8
JM		 2894 /*
2895 * Note: last_rx_eapol_key length fields have already been validated in
2896 * wpa_receive().
2897 */
2898 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2899 key = (struct wpa_eapol_key *) (hdr + 1);
2900 mic = (u8 *) (key + 1);
2901 key_data = mic + mic_len + 2;
2902 key_data_length = WPA_GET_BE16(mic + mic_len);
2903 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2904 sizeof(*key) - mic_len - 2)
2905 return;
2906
2907 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2908 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2909 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2910 return;
2911 }
2912 if (kde.rsn_ie) {
2913 eapol_key_ie = kde.rsn_ie;
2914 eapol_key_ie_len = kde.rsn_ie_len;
2915 } else if (kde.osen) {
2916 eapol_key_ie = kde.osen;
2917 eapol_key_ie_len = kde.osen_len;
2918 } else {
2919 eapol_key_ie = kde.wpa_ie;
2920 eapol_key_ie_len = kde.wpa_ie_len;
2921 }
2922 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2923 if (sm->wpa_ie == NULL ||
2924 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2925 eapol_key_ie, eapol_key_ie_len)) {
2926 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2927 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2928 if (sm->wpa_ie) {
2929 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2930 sm->wpa_ie, sm->wpa_ie_len);
2931 }
2932 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2933 eapol_key_ie, eapol_key_ie_len);
2934 /* MLME-DEAUTHENTICATE.request */
567da5bb
JM		 2935 wpa_sta_disconnect(wpa_auth, sm->addr,
2936 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2937 return;
2938 }
aed61c4e
MV		 2939#ifdef CONFIG_OCV
2940 if (wpa_auth_uses_ocv(sm)) {
2941 struct wpa_channel_info ci;
2942 int tx_chanwidth;
2943 int tx_seg1_idx;
2944
2945 if (wpa_channel_info(wpa_auth, &ci) != 0) {
2946 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2947 "Failed to get channel info to validate received OCI in EAPOL-Key 2/4");
2948 return;
2949 }
2950
2951 if (get_sta_tx_parameters(sm,
2952 channel_width_to_int(ci.chanwidth),
2953 ci.seg1_idx, &tx_chanwidth,
2954 &tx_seg1_idx) < 0)
2955 return;
2956
2957 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
2958 tx_chanwidth, tx_seg1_idx) != 0) {
2959 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2960 ocv_errorstr);
2961 return;
2962 }
2963 }
2964#endif /* CONFIG_OCV */
4ec1fd8e 2965#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8 2966 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
567da5bb
JM		 2967 wpa_sta_disconnect(wpa_auth, sm->addr,
2968 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2969 return;
2970 }
4ec1fd8e 2971#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2972#ifdef CONFIG_P2P
2973 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2974 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2975 int idx;
2976 wpa_printf(MSG_DEBUG,
2977 "P2P: IP address requested in EAPOL-Key exchange");
2978 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2979 if (idx >= 0) {
2980 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2981 bitfield_set(wpa_auth->ip_pool, idx);
2982 WPA_PUT_BE32(sm->ip_addr, start + idx);
2983 wpa_printf(MSG_DEBUG,
2984 "P2P: Assigned IP address %u.%u.%u.%u to "
2985 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2986 sm->ip_addr[2], sm->ip_addr[3],
2987 MAC2STR(sm->addr));
2988 }
2989 }
2990#endif /* CONFIG_P2P */
2991
4ec1fd8e 2992#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2993 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2994 /*
2995 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2996 * with the value we derived.
2997 */
870834a1
JM		 2998 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2999 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 3000 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3001 "PMKR1Name mismatch in FT 4-way "
3002 "handshake");
3003 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
3004 "Supplicant",
3005 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
3006 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
3007 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
3008 return;
3009 }
3010 }
4ec1fd8e 3011#endif /* CONFIG_IEEE80211R_AP */
26e23750 3012
dbfa691d
JM		 3013 if (vlan_id && wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
3014 wpa_auth_update_vlan(wpa_auth, sm->addr, vlan_id) < 0) {
3015 wpa_sta_disconnect(wpa_auth, sm->addr,
3016 WLAN_REASON_PREV_AUTH_NOT_VALID);
3017 return;
3018 }
3019
e4bf4db9 3020 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 3021 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
3022
56586197 3023 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 3024 /* PSK may have changed from the previous choice, so update
3025 * state machine data based on whatever PSK was selected here.
3026 */
3027 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 3028 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 3029 }
3030
3031 sm->MICVerified = TRUE;
3032
3033 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
31bc66e4 3034 forced_memzero(&PTK, sizeof(PTK));
6fc6879b
JM		 3035 sm->PTK_valid = TRUE;
3036}
3037
3038
3039SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
3040{
3041 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
3042 sm->TimeoutCtr = 0;
3043}
3044
3045
6fc6879b
JM		 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
6fc6879b 3092
17c2559c
MV		 3093static int ocv_oci_len(struct wpa_state_machine *sm)
3094{
3095#ifdef CONFIG_OCV
3096 if (wpa_auth_uses_ocv(sm))
3097 return OCV_OCI_KDE_LEN;
3098#endif /* CONFIG_OCV */
3099 return 0;
3100}
3101
3102static int ocv_oci_add(struct wpa_state_machine *sm, u8 **argpos)
3103{
3104#ifdef CONFIG_OCV
3105 struct wpa_channel_info ci;
3106
3107 if (!wpa_auth_uses_ocv(sm))
3108 return 0;
3109
3110 if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
3111 wpa_printf(MSG_WARNING,
3112 "Failed to get channel info for OCI element");
3113 return -1;
3114 }
3115
3116 return ocv_insert_oci_kde(&ci, argpos);
3117#else /* CONFIG_OCV */
3118 return 0;
3119#endif /* CONFIG_OCV */
3120}
3121
3122
6fc6879b
JM		 3123SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
3124{
83421850 3125 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 3126 size_t gtk_len, kde_len;
3127 struct wpa_group *gsm = sm->group;
3128 u8 *wpa_ie;
7a4b01c8 3129 int wpa_ie_len, secure, gtkidx, encr = 0;
6fc6879b
JM		 3130
3131 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
3132 sm->TimeoutEvt = FALSE;
bae61562
JM		 3133
3134 sm->TimeoutCtr++;
6f234c1e
JM		 3135 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3136 sm->TimeoutCtr > 1) {
3137 /* Do not allow retransmission of EAPOL-Key msg 3/4 */
3138 return;
3139 }
41f140d3 3140 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 3141 /* No point in sending the EAPOL-Key - we will disconnect
3142 * immediately following this. */
3143 return;
3144 }
3145
86dfabb8
JM		 3146 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
3147 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 3148 */
3149 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3150 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 3151 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 3152 wpa_ie = sm->wpa_auth->wpa_ie;
3153 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
3154 if (sm->wpa == WPA_VERSION_WPA &&
3155 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
3156 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 3157 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 3158 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 3159 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
3160 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 3161 wpa_ie_len = wpa_ie[1] + 2;
3162 }
3163 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3164 "sending 3/4 msg of 4-Way Handshake");
3165 if (sm->wpa == WPA_VERSION_WPA2) {
3166 /* WPA2 send GTK in the 4-way handshake */
3167 secure = 1;
3168 gtk = gsm->GTK[gsm->GN - 1];
3169 gtk_len = gsm->GTK_len;
8d660a4b
JM		 3170 if (sm->wpa_auth->conf.disable_gtk ||
3171 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3172 /*
3173 * Provide unique random GTK to each STA to prevent use
3174 * of GTK in the BSS.
3175 */
3176 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
3177 return;
3178 gtk = dummy_gtk;
3179 }
7a4b01c8 3180 gtkidx = gsm->GN;
6fc6879b
JM		 3181 _rsc = rsc;
3182 encr = 1;
3183 } else {
3184 /* WPA does not include GTK in msg 3/4 */
3185 secure = 0;
3186 gtk = NULL;
3187 gtk_len = 0;
6fc6879b 3188 _rsc = NULL;
0d442aff
JM		 3189 if (sm->rx_eapol_key_secure) {
3190 /*
3191 * It looks like Windows 7 supplicant tries to use
3192 * Secure bit in msg 2/4 after having reported Michael
3193 * MIC failure and it then rejects the 4-way handshake
3194 * if msg 3/4 does not set Secure bit. Work around this
3195 * by setting the Secure bit here even in the case of
3196 * WPA if the supplicant used it first.
3197 */
3198 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 3199 "STA used Secure bit in WPA msg 2/4 - "
3200 "set Secure for 3/4 as workaround");
0d442aff
JM		 3201 secure = 1;
3202 }
6fc6879b
JM		 3203 }
3204
17c2559c 3205 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
6fc6879b
JM		 3206 if (gtk)
3207 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 3208#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 3209 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3210 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
3211 kde_len += 300; /* FTIE + 2 * TIE */
3212 }
4ec1fd8e 3213#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3214#ifdef CONFIG_P2P
3215 if (WPA_GET_BE32(sm->ip_addr) > 0)
3216 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
3217#endif /* CONFIG_P2P */
6fc6879b
JM		 3218 kde = os_malloc(kde_len);
3219 if (kde == NULL)
3220 return;
3221
3222 pos = kde;
3223 os_memcpy(pos, wpa_ie, wpa_ie_len);
3224 pos += wpa_ie_len;
4ec1fd8e 3225#ifdef CONFIG_IEEE80211R_AP
26e23750 3226 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 3227 int res;
3228 size_t elen;
3229
3230 elen = pos - kde;
3231 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 3232 if (res < 0) {
3233 wpa_printf(MSG_ERROR, "FT: Failed to insert "
3234 "PMKR1Name into RSN IE in EAPOL-Key data");
3235 os_free(kde);
3236 return;
3237 }
59e78c24
JM		 3238 pos -= wpa_ie_len;
3239 pos += elen;
26e23750 3240 }
4ec1fd8e 3241#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3242 if (gtk) {
3243 u8 hdr[2];
7a4b01c8 3244 hdr[0] = gtkidx & 0x03;
6fc6879b
JM		 3245 hdr[1] = 0;
3246 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
3247 gtk, gtk_len);
3248 }
3249 pos = ieee80211w_kde_add(sm, pos);
17c2559c
MV		 3250 if (ocv_oci_add(sm, &pos) < 0) {
3251 os_free(kde);
3252 return;
3253 }
6fc6879b 3254
4ec1fd8e 3255#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 3256 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
3257 int res;
3258 struct wpa_auth_config *conf;
3259
3260 conf = &sm->wpa_auth->conf;
9257610a
JM		 3261 if (sm->assoc_resp_ftie &&
3262 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
3263 os_memcpy(pos, sm->assoc_resp_ftie,
3264 2 + sm->assoc_resp_ftie[1]);
3265 res = 2 + sm->assoc_resp_ftie[1];
3266 } else {
a7968ea5
JM		 3267 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
3268
3269 res = wpa_write_ftie(conf, use_sha384,
3270 conf->r0_key_holder,
9257610a
JM		 3271 conf->r0_key_holder_len,
3272 NULL, NULL, pos,
3273 kde + kde_len - pos,
3274 NULL, 0);
3275 }
86dfabb8
JM		 3276 if (res < 0) {
3277 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
3278 "into EAPOL-Key Key Data");
3279 os_free(kde);
3280 return;
3281 }
3282 pos += res;
3283
3284 /* TIE[ReassociationDeadline] (TU) */
3285 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3286 *pos++ = 5;
3287 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3288 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3289 pos += 4;
3290
3291 /* TIE[KeyLifetime] (seconds) */
3292 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3293 *pos++ = 5;
3294 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 3295 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
86dfabb8
JM		 3296 pos += 4;
3297 }
4ec1fd8e 3298#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3299#ifdef CONFIG_P2P
3300 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3301 u8 addr[3 * 4];
3302 os_memcpy(addr, sm->ip_addr, 4);
3303 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3304 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3305 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3306 addr, sizeof(addr), NULL, 0);
3307 }
3308#endif /* CONFIG_P2P */
86dfabb8 3309
6fc6879b 3310 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3311 (secure ? WPA_KEY_INFO_SECURE : 0) |
567da5bb
JM		 3312 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3313 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3314 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3315 WPA_KEY_INFO_KEY_TYPE,
7a4b01c8 3316 _rsc, sm->ANonce, kde, pos - kde, 0, encr);
6fc6879b 3317 os_free(kde);
6fc6879b
JM		 3318}
3319
3320
3321SM_STATE(WPA_PTK, PTKINITDONE)
3322{
3323 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3324 sm->EAPOLKeyReceived = FALSE;
3325 if (sm->Pair) {
c3550295
JM		 3326 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3327 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 3328 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 3329 sm->PTK.tk, klen)) {
567da5bb
JM		 3330 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3331 WLAN_REASON_PREV_AUTH_NOT_VALID);
6fc6879b
JM		 3332 return;
3333 }
3334 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3335 sm->pairwise_set = TRUE;
3336
a40bd06e 3337 wpa_auth_set_ptk_rekey_timer(sm);
581a8cde 3338
a1ea1b45 3339 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 3340 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 3341 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 3342 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3343 WPA_EAPOL_authorized, 1);
3344 }
3345 }
3346
3347 if (0 /* IBSS == TRUE */) {
3348 sm->keycount++;
3349 if (sm->keycount == 2) {
3350 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3351 WPA_EAPOL_portValid, 1);
3352 }
3353 } else {
3354 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3355 1);
3356 }
3357 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3358 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3359 if (sm->wpa == WPA_VERSION_WPA)
3360 sm->PInitAKeys = TRUE;
3361 else
3362 sm->has_GTK = TRUE;
3363 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3364 "pairwise key handshake completed (%s)",
3365 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3366
4ec1fd8e 3367#ifdef CONFIG_IEEE80211R_AP
6fc6879b 3368 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 3369#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3370}
3371
3372
3373SM_STEP(WPA_PTK)
3374{
3375 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3376
3377 if (sm->Init)
3378 SM_ENTER(WPA_PTK, INITIALIZE);
3379 else if (sm->Disconnect
1aae01fc
BG		 3380 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3381 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3382 "WPA_PTK: sm->Disconnect");
6fc6879b 3383 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 3384 }
6fc6879b
JM		 3385 else if (sm->DeauthenticationRequest)
3386 SM_ENTER(WPA_PTK, DISCONNECTED);
3387 else if (sm->AuthenticationRequest)
3388 SM_ENTER(WPA_PTK, AUTHENTICATION);
3389 else if (sm->ReAuthenticationRequest)
3390 SM_ENTER(WPA_PTK, AUTHENTICATION2);
0adc9b28
JM		 3391 else if (sm->PTKRequest) {
3392 if (wpa_auth_sm_ptk_update(sm) < 0)
3393 SM_ENTER(WPA_PTK, DISCONNECTED);
3394 else
3395 SM_ENTER(WPA_PTK, PTKSTART);
3396 } else switch (sm->wpa_ptk_state) {
6fc6879b
JM		 3397 case WPA_PTK_INITIALIZE:
3398 break;
3399 case WPA_PTK_DISCONNECT:
3400 SM_ENTER(WPA_PTK, DISCONNECTED);
3401 break;
3402 case WPA_PTK_DISCONNECTED:
3403 SM_ENTER(WPA_PTK, INITIALIZE);
3404 break;
3405 case WPA_PTK_AUTHENTICATION:
3406 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3407 break;
3408 case WPA_PTK_AUTHENTICATION2:
56586197 3409 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 3410 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3411 WPA_EAPOL_keyRun) > 0)
3412 SM_ENTER(WPA_PTK, INITPMK);
a1ea1b45
JM		 3413 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3414 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
6fc6879b
JM		 3415 /* FIX: && 802.1X::keyRun */)
3416 SM_ENTER(WPA_PTK, INITPSK);
567da5bb
JM		 3417 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3418 SM_ENTER(WPA_PTK, INITPMK);
6fc6879b
JM		 3419 break;
3420 case WPA_PTK_INITPMK:
3421 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
567da5bb 3422 WPA_EAPOL_keyAvailable) > 0) {
6fc6879b 3423 SM_ENTER(WPA_PTK, PTKSTART);
567da5bb
JM		 3424#ifdef CONFIG_DPP
3425 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3426 SM_ENTER(WPA_PTK, PTKSTART);
3427#endif /* CONFIG_DPP */
3428 } else {
6fc6879b 3429 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 3430 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3431 "INITPMK - keyAvailable = false");
6fc6879b
JM		 3432 SM_ENTER(WPA_PTK, DISCONNECT);
3433 }
3434 break;
3435 case WPA_PTK_INITPSK:
759fd76b 3436 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
dbfa691d 3437 NULL, NULL, NULL)) {
6fc6879b 3438 SM_ENTER(WPA_PTK, PTKSTART);
e61fea6b
JM		 3439#ifdef CONFIG_SAE
3440 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3441 SM_ENTER(WPA_PTK, PTKSTART);
3442#endif /* CONFIG_SAE */
3443 } else {
6fc6879b
JM		 3444 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3445 "no PSK configured for the STA");
3446 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3447 SM_ENTER(WPA_PTK, DISCONNECT);
3448 }
3449 break;
3450 case WPA_PTK_PTKSTART:
3451 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3452 sm->EAPOLKeyPairwise)
3453 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3454 else if (sm->TimeoutCtr >
41f140d3 3455 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3456 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3457 wpa_auth_vlogger(
3458 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3459 "PTKSTART: Retry limit %u reached",
3460 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3461 SM_ENTER(WPA_PTK, DISCONNECT);
3462 } else if (sm->TimeoutEvt)
3463 SM_ENTER(WPA_PTK, PTKSTART);
3464 break;
3465 case WPA_PTK_PTKCALCNEGOTIATING:
3466 if (sm->MICVerified)
3467 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3468 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3469 sm->EAPOLKeyPairwise)
3470 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3471 else if (sm->TimeoutEvt)
3472 SM_ENTER(WPA_PTK, PTKSTART);
3473 break;
3474 case WPA_PTK_PTKCALCNEGOTIATING2:
3475 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3476 break;
3477 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3478 if (sm->update_snonce)
3479 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3480 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3481 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3482 SM_ENTER(WPA_PTK, PTKINITDONE);
3483 else if (sm->TimeoutCtr >
6f234c1e
JM		 3484 sm->wpa_auth->conf.wpa_pairwise_update_count ||
3485 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3486 sm->TimeoutCtr > 1)) {
6fc6879b 3487 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3488 wpa_auth_vlogger(
3489 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3490 "PTKINITNEGOTIATING: Retry limit %u reached",
3491 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3492 SM_ENTER(WPA_PTK, DISCONNECT);
3493 } else if (sm->TimeoutEvt)
3494 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3495 break;
3496 case WPA_PTK_PTKINITDONE:
3497 break;
3498 }
3499}
3500
3501
3502SM_STATE(WPA_PTK_GROUP, IDLE)
3503{
3504 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3505 if (sm->Init) {
3506 /* Init flag is not cleared here, so avoid busy
3507 * loop by claiming nothing changed. */
3508 sm->changed = FALSE;
3509 }
3510 sm->GTimeoutCtr = 0;
3511}
3512
3513
3514SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3515{
3516 u8 rsc[WPA_KEY_RSC_LEN];
3517 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3518 const u8 *kde;
3519 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3520 size_t kde_len;
83421850 3521 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3522
3523 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3524
3525 sm->GTimeoutCtr++;
6f234c1e
JM		 3526 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3527 sm->GTimeoutCtr > 1) {
3528 /* Do not allow retransmission of EAPOL-Key group msg 1/2 */
3529 return;
3530 }
41f140d3 3531 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3532 /* No point in sending the EAPOL-Key - we will disconnect
3533 * immediately following this. */
3534 return;
3535 }
3536
6fc6879b
JM		 3537 if (sm->wpa == WPA_VERSION_WPA)
3538 sm->PInitAKeys = FALSE;
3539 sm->TimeoutEvt = FALSE;
3540 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3541 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3542 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3543 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3544 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3545 "sending 1/2 msg of Group Key Handshake");
3546
83421850 3547 gtk = gsm->GTK[gsm->GN - 1];
8d660a4b
JM		 3548 if (sm->wpa_auth->conf.disable_gtk ||
3549 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN) {
83421850
JM		 3550 /*
3551 * Provide unique random GTK to each STA to prevent use
3552 * of GTK in the BSS.
3553 */
3554 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3555 return;
3556 gtk = dummy_gtk;
3557 }
6fc6879b
JM		 3558 if (sm->wpa == WPA_VERSION_WPA2) {
3559 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
17c2559c 3560 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
e41e4f9e
JM		 3561 kde_buf = os_malloc(kde_len);
3562 if (kde_buf == NULL)
6fc6879b
JM		 3563 return;
3564
e41e4f9e 3565 kde = pos = kde_buf;
6fc6879b
JM		 3566 hdr[0] = gsm->GN & 0x03;
3567 hdr[1] = 0;
3568 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3569 gtk, gsm->GTK_len);
6fc6879b 3570 pos = ieee80211w_kde_add(sm, pos);
17c2559c
MV		 3571 if (ocv_oci_add(sm, &pos) < 0) {
3572 os_free(kde_buf);
3573 return;
3574 }
e41e4f9e 3575 kde_len = pos - kde;
6fc6879b 3576 } else {
83421850 3577 kde = gtk;
e41e4f9e 3578 kde_len = gsm->GTK_len;
6fc6879b
JM		 3579 }
3580
3581 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3582 WPA_KEY_INFO_SECURE |
567da5bb
JM		 3583 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3584 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3585 WPA_KEY_INFO_ACK |
3586 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3587 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3588
3589 os_free(kde_buf);
6fc6879b
JM		 3590}
3591
3592
3593SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3594{
aed61c4e
MV		 3595#ifdef CONFIG_OCV
3596 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3597 const u8 *key_data, *mic;
3598 struct ieee802_1x_hdr *hdr;
3599 struct wpa_eapol_key *key;
3600 struct wpa_eapol_ie_parse kde;
3601 size_t mic_len;
3602 u16 key_data_length;
3603#endif /* CONFIG_OCV */
3604
6fc6879b
JM		 3605 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3606 sm->EAPOLKeyReceived = FALSE;
aed61c4e
MV		 3607
3608#ifdef CONFIG_OCV
3609 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3610
3611 /*
3612 * Note: last_rx_eapol_key length fields have already been validated in
3613 * wpa_receive().
3614 */
3615 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
3616 key = (struct wpa_eapol_key *) (hdr + 1);
3617 mic = (u8 *) (key + 1);
3618 key_data = mic + mic_len + 2;
3619 key_data_length = WPA_GET_BE16(mic + mic_len);
3620 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
3621 sizeof(*key) - mic_len - 2)
3622 return;
3623
3624 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
3625 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
3626 "received EAPOL-Key group msg 2/2 with invalid Key Data contents");
3627 return;
3628 }
3629
3630 if (wpa_auth_uses_ocv(sm)) {
3631 struct wpa_channel_info ci;
3632 int tx_chanwidth;
3633 int tx_seg1_idx;
3634
3635 if (wpa_channel_info(wpa_auth, &ci) != 0) {
3636 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3637 "Failed to get channel info to validate received OCI in EAPOL-Key group 1/2");
3638 return;
3639 }
3640
3641 if (get_sta_tx_parameters(sm,
3642 channel_width_to_int(ci.chanwidth),
3643 ci.seg1_idx, &tx_chanwidth,
3644 &tx_seg1_idx) < 0)
3645 return;
3646
3647 if (ocv_verify_tx_params(kde.oci, kde.oci_len, &ci,
3648 tx_chanwidth, tx_seg1_idx) != 0) {
3649 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
3650 ocv_errorstr);
3651 return;
3652 }
3653 }
3654#endif /* CONFIG_OCV */
3655
6fc6879b
JM		 3656 if (sm->GUpdateStationKeys)
3657 sm->group->GKeyDoneStations--;
3658 sm->GUpdateStationKeys = FALSE;
3659 sm->GTimeoutCtr = 0;
3660 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3661 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3662 "group key handshake completed (%s)",
3663 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3664 sm->has_GTK = TRUE;
3665}
3666
3667
3668SM_STATE(WPA_PTK_GROUP, KEYERROR)
3669{
3670 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3671 if (sm->GUpdateStationKeys)
3672 sm->group->GKeyDoneStations--;
3673 sm->GUpdateStationKeys = FALSE;
3674 sm->Disconnect = TRUE;
4bb9b674
GK		 3675 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3676 "group key handshake failed (%s) after %u tries",
3677 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3678 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3679}
3680
3681
3682SM_STEP(WPA_PTK_GROUP)
3683{
9663596f 3684 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3685 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3686 sm->PtkGroupInit = FALSE;
3687 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3688 case WPA_PTK_GROUP_IDLE:
3689 if (sm->GUpdateStationKeys ||
3690 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3691 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3692 break;
3693 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3694 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3695 !sm->EAPOLKeyPairwise && sm->MICVerified)
3696 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3697 else if (sm->GTimeoutCtr >
6f234c1e
JM		 3698 sm->wpa_auth->conf.wpa_group_update_count ||
3699 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3700 sm->GTimeoutCtr > 1))
6fc6879b
JM		 3701 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3702 else if (sm->TimeoutEvt)
3703 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3704 break;
3705 case WPA_PTK_GROUP_KEYERROR:
3706 SM_ENTER(WPA_PTK_GROUP, IDLE);
3707 break;
3708 case WPA_PTK_GROUP_REKEYESTABLISHED:
3709 SM_ENTER(WPA_PTK_GROUP, IDLE);
3710 break;
3711 }
3712}
3713
3714
3715static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3716 struct wpa_group *group)
3717{
3718 int ret = 0;
3719
6fc6879b
JM		 3720 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3721 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3722 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3723 wpa_auth->addr, group->GNonce,
3724 group->GTK[group->GN - 1], group->GTK_len) < 0)
3725 ret = -1;
5cb9d5c3
JM		 3726 wpa_hexdump_key(MSG_DEBUG, "GTK",
3727 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b 3728
70f8cc8e 3729 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3730 size_t len;
3731 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3732 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3733 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3734 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3735 wpa_auth->addr, group->GNonce,
8dd9f9cd 3736 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3737 ret = -1;
6fc6879b 3738 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3739 group->IGTK[group->GN_igtk - 4], len);
6fc6879b 3740 }
6fc6879b
JM		 3741
3742 return ret;
3743}
3744
3745
3746static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3747 struct wpa_group *group)
3748{
3749 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3750 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3751 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3752 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3753
3754 /* GTK[0..N] = 0 */
3755 os_memset(group->GTK, 0, sizeof(group->GTK));
3756 group->GN = 1;
3757 group->GM = 2;
6fc6879b
JM		 3758 group->GN_igtk = 4;
3759 group->GM_igtk = 5;
6fc6879b
JM		 3760 /* GTK[GN] = CalcGTK() */
3761 wpa_gtk_update(wpa_auth, group);
3762}
3763
3764
3765static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3766{
473b6f22
MB		 3767 if (ctx != NULL && ctx != sm->group)
3768 return 0;
3769
6fc6879b
JM		 3770 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3771 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3772 "Not in PTKINITDONE; skip Group Key update");
3c183894 3773 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3774 return 0;
3775 }
9663596f
JM		 3776 if (sm->GUpdateStationKeys) {
3777 /*
3c183894
JM		 3778 * This should not really happen, so add a debug log entry.
3779 * Since we clear the GKeyDoneStations before the loop, the
3780 * station needs to be counted here anyway.
9663596f
JM		 3781 */
3782 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3783 "GUpdateStationKeys was already set when "
3784 "marking station for GTK rekeying");
9663596f 3785 }
3c183894 3786
ad3872a3 3787 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3788 if (sm->is_wnmsleep)
3789 return 0;
d32d94db 3790
3c183894
JM		 3791 sm->group->GKeyDoneStations++;
3792 sm->GUpdateStationKeys = TRUE;
3793
6fc6879b
JM		 3794 wpa_sm_step(sm);
3795 return 0;
3796}
3797
3798
b5bf84ba 3799#ifdef CONFIG_WNM_AP
ad3872a3 3800/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3801void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3802{
629edfef 3803 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3804 return;
3805
3806 wpa_group_update_sta(sm, NULL);
3807}
3808
3809
3810void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3811{
629edfef
JM		 3812 if (sm)
3813 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3814}
3815
3816
3817int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3818{
d32d94db 3819 struct wpa_group *gsm = sm->group;
835822d4 3820 u8 *start = pos;
d32d94db
XC		 3821
3822 /*
835822d4 3823 * GTK subelement:
d32d94db 3824 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3825 * Key[5..32]
d32d94db 3826 */
835822d4
JM		 3827 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3828 *pos++ = 11 + gsm->GTK_len;
d32d94db 3829 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3830 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3831 pos += 2;
3832 *pos++ = gsm->GTK_len;
3833 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3834 return 0;
835822d4
JM		 3835 pos += 8;
3836 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3837 pos += gsm->GTK_len;
d32d94db 3838
835822d4
JM		 3839 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3840 gsm->GN);
3841 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3842 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3843
835822d4 3844 return pos - start;
d32d94db
XC		 3845}
3846
3847
d32d94db
XC		 3848int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3849{
d32d94db 3850 struct wpa_group *gsm = sm->group;
835822d4 3851 u8 *start = pos;
8dd9f9cd 3852 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3853
835822d4
JM		 3854 /*
3855 * IGTK subelement:
3856 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3857 */
3858 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3859 *pos++ = 2 + 6 + len;
835822d4
JM		 3860 WPA_PUT_LE16(pos, gsm->GN_igtk);
3861 pos += 2;
3862 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3863 return 0;
835822d4 3864 pos += 6;
d32d94db 3865
8dd9f9cd
JM		 3866 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3867 pos += len;
d32d94db 3868
835822d4
JM		 3869 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3870 gsm->GN_igtk);
3871 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3872 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3873
835822d4 3874 return pos - start;
d32d94db 3875}
7d2ed8ba 3876
b5bf84ba 3877#endif /* CONFIG_WNM_AP */
d32d94db
XC		 3878
3879
6fc6879b
JM		 3880static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3881 struct wpa_group *group)
3882{
3883 int tmp;
3884
3885 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3886 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3887 group->changed = TRUE;
3888 group->wpa_group_state = WPA_GROUP_SETKEYS;
3889 group->GTKReKey = FALSE;
3890 tmp = group->GM;
3891 group->GM = group->GN;
3892 group->GN = tmp;
6fc6879b
JM		 3893 tmp = group->GM_igtk;
3894 group->GM_igtk = group->GN_igtk;
3895 group->GN_igtk = tmp;
6fc6879b
JM		 3896 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3897 * counting the STAs that are marked with GUpdateStationKeys instead of
3898 * including all STAs that could be in not-yet-completed state. */
3899 wpa_gtk_update(wpa_auth, group);
3900
3c183894
JM		 3901 if (group->GKeyDoneStations) {
3902 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3903 "GKeyDoneStations=%d when starting new GTK rekey",
3904 group->GKeyDoneStations);
3905 group->GKeyDoneStations = 0;
3906 }
473b6f22 3907 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3908 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3909 group->GKeyDoneStations);
3910}
3911
3912
1bdb7ab3
JM		 3913static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3914 struct wpa_group *group)
6fc6879b 3915{
3c7302c2
JM		 3916 int ret = 0;
3917
3c7302c2 3918 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3919 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3920 broadcast_ether_addr, group->GN,
3921 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3922 ret = -1;
6fc6879b 3923
8dd9f9cd
JM		 3924 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3925 enum wpa_alg alg;
3926 size_t len;
3927
3928 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3929 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3930
3931 if (ret == 0 &&
3932 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3933 broadcast_ether_addr, group->GN_igtk,
3934 group->IGTK[group->GN_igtk - 4], len) < 0)
3935 ret = -1;
3936 }
3c7302c2
JM		 3937
3938 return ret;
6fc6879b
JM		 3939}
3940
3941
7d7f7be2
JM		 3942static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3943{
3944 if (sm->group == ctx) {
3945 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3946 " for discconnection due to fatal failure",
3947 MAC2STR(sm->addr));
3948 sm->Disconnect = TRUE;
3949 }
3950
3951 return 0;
3952}
3953
3954
3955static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3956 struct wpa_group *group)
3957{
3958 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3959 group->changed = TRUE;
3960 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3961 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3962}
3963
3964
1bdb7ab3
JM		 3965static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3966 struct wpa_group *group)
3967{
3968 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3969 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3970 group->changed = TRUE;
3971 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3972
7d7f7be2
JM		 3973 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3974 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3975 return -1;
7d7f7be2 3976 }
1bdb7ab3
JM		 3977
3978 return 0;
3979}
3980
3981
6fc6879b
JM		 3982static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3983 struct wpa_group *group)
3984{
3985 if (group->GInit) {
3986 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3987 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3988 /* Do not allow group operations */
6fc6879b
JM		 3989 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3990 group->GTKAuthenticator) {
3991 wpa_group_setkeysdone(wpa_auth, group);
3992 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3993 group->GTKReKey) {
3994 wpa_group_setkeys(wpa_auth, group);
3995 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3996 if (group->GKeyDoneStations == 0)
3997 wpa_group_setkeysdone(wpa_auth, group);
3998 else if (group->GTKReKey)
3999 wpa_group_setkeys(wpa_auth, group);
4000 }
4001}
4002
4003
e4a6ea1d 4004static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 4005{
4006 if (sm == NULL)
e4a6ea1d 4007 return 0;
6fc6879b
JM		 4008
4009 if (sm->in_step_loop) {
4010 /* This should not happen, but if it does, make sure we do not
4011 * end up freeing the state machine too early by exiting the
4012 * recursive call. */
4013 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 4014 return 0;
6fc6879b
JM		 4015 }
4016
4017 sm->in_step_loop = 1;
4018 do {
4019 if (sm->pending_deinit)
4020 break;
4021
4022 sm->changed = FALSE;
4023 sm->wpa_auth->group->changed = FALSE;
4024
4025 SM_STEP_RUN(WPA_PTK);
4026 if (sm->pending_deinit)
4027 break;
4028 SM_STEP_RUN(WPA_PTK_GROUP);
4029 if (sm->pending_deinit)
4030 break;
4031 wpa_group_sm_step(sm->wpa_auth, sm->group);
4032 } while (sm->changed || sm->wpa_auth->group->changed);
4033 sm->in_step_loop = 0;
4034
4035 if (sm->pending_deinit) {
4036 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
4037 "machine deinit for " MACSTR, MAC2STR(sm->addr));
4038 wpa_free_sta_sm(sm);
e4a6ea1d 4039 return 1;
6fc6879b 4040 }
e4a6ea1d 4041 return 0;
6fc6879b
JM		 4042}
4043
4044
4045static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
4046{
4047 struct wpa_state_machine *sm = eloop_ctx;
4048 wpa_sm_step(sm);
4049}
4050
4051
4052void wpa_auth_sm_notify(struct wpa_state_machine *sm)
4053{
4054 if (sm == NULL)
4055 return;
4056 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
4057}
4058
4059
4060void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
4061{
4062 int tmp, i;
4063 struct wpa_group *group;
4064
4065 if (wpa_auth == NULL)
4066 return;
4067
4068 group = wpa_auth->group;
4069
4070 for (i = 0; i < 2; i++) {
4071 tmp = group->GM;
4072 group->GM = group->GN;
4073 group->GN = tmp;
6fc6879b
JM		 4074 tmp = group->GM_igtk;
4075 group->GM_igtk = group->GN_igtk;
4076 group->GN_igtk = tmp;
6fc6879b 4077 wpa_gtk_update(wpa_auth, group);
9354e594 4078 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 4079 }
4080}
4081
4082
a6da824b 4083static const char * wpa_bool_txt(int val)
6fc6879b 4084{
a6da824b 4085 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 4086}
4087
4088
6fc6879b
JM		 4089#define RSN_SUITE "%02x-%02x-%02x-%d"
4090#define RSN_SUITE_ARG(s) \
4091((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
4092
4093int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
4094{
4095 int len = 0, ret;
4096 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 4097#ifdef CONFIG_RSN_PREAUTH
4098 const int preauth = 1;
4099#else /* CONFIG_RSN_PREAUTH */
4100 const int preauth = 0;
4101#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 4102
4103 if (wpa_auth == NULL)
4104 return len;
4105
4106 ret = os_snprintf(buf + len, buflen - len,
4107 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 4108 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 4109 "dot11RSNAEnabled=%s\n"
4110 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 4111 wpa_bool_txt(preauth),
6fc6879b
JM		 4112 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
4113 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 4114 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4115 return len;
4116 len += ret;
4117
4118 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
4119 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
4120
4121 ret = os_snprintf(
4122 buf + len, buflen - len,
4123 "dot11RSNAConfigVersion=%u\n"
4124 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
4125 /* FIX: dot11RSNAConfigGroupCipher */
4126 /* FIX: dot11RSNAConfigGroupRekeyMethod */
4127 /* FIX: dot11RSNAConfigGroupRekeyTime */
4128 /* FIX: dot11RSNAConfigGroupRekeyPackets */
4129 "dot11RSNAConfigGroupRekeyStrict=%u\n"
4130 "dot11RSNAConfigGroupUpdateCount=%u\n"
4131 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
4132 "dot11RSNAConfigGroupCipherSize=%u\n"
4133 "dot11RSNAConfigPMKLifetime=%u\n"
4134 "dot11RSNAConfigPMKReauthThreshold=%u\n"
4135 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
4136 "dot11RSNAConfigSATimeout=%u\n"
4137 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
4138 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
4139 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
4140 "dot11RSNAPMKIDUsed=%s\n"
4141 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
4142 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
4143 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
4144 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
4145 "dot11RSNA4WayHandshakeFailures=%u\n"
4146 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
4147 RSN_VERSION,
4148 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 4149 wpa_auth->conf.wpa_group_update_count,
4150 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 4151 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 4152 dot11RSNAConfigPMKLifetime,
4153 dot11RSNAConfigPMKReauthThreshold,
4154 dot11RSNAConfigSATimeout,
4155 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
4156 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
4157 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
4158 pmkid_txt,
4159 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
4160 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
4161 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
4162 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
4163 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 4164 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4165 return len;
4166 len += ret;
4167
4168 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
4169 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
4170
4171 /* Private MIB */
4172 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
4173 wpa_auth->group->wpa_group_state);
d85e1fc8 4174 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4175 return len;
4176 len += ret;
4177
4178 return len;
4179}
4180
4181
4182int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
4183{
4184 int len = 0, ret;
4185 u32 pairwise = 0;
4186
4187 if (sm == NULL)
4188 return 0;
4189
4190 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
4191
4192 /* dot11RSNAStatsEntry */
4193
c3550295
JM		 4194 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
4195 WPA_PROTO_RSN : WPA_PROTO_WPA,
4196 sm->pairwise);
4197 if (pairwise == 0)
6fc6879b
JM		 4198 return 0;
4199
4200 ret = os_snprintf(
4201 buf + len, buflen - len,
4202 /* TODO: dot11RSNAStatsIndex */
4203 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
4204 "dot11RSNAStatsVersion=1\n"
4205 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
4206 /* TODO: dot11RSNAStatsTKIPICVErrors */
4207 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 4208 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 4209 /* TODO: dot11RSNAStatsCCMPReplays */
4210 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
4211 /* TODO: dot11RSNAStatsTKIPReplays */,
4212 MAC2STR(sm->addr),
4213 RSN_SUITE_ARG(pairwise),
4214 sm->dot11RSNAStatsTKIPLocalMICFailures,
4215 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 4216 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4217 return len;
4218 len += ret;
4219
4220 /* Private MIB */
4221 ret = os_snprintf(buf + len, buflen - len,
d1b1f9fa
JM		 4222 "wpa=%d\n"
4223 "AKMSuiteSelector=" RSN_SUITE "\n"
6fc6879b
JM		 4224 "hostapdWPAPTKState=%d\n"
4225 "hostapdWPAPTKGroupState=%d\n",
d1b1f9fa
JM		 4226 sm->wpa,
4227 RSN_SUITE_ARG(wpa_akm_to_suite(sm->wpa_key_mgmt)),
6fc6879b
JM		 4228 sm->wpa_ptk_state,
4229 sm->wpa_ptk_group_state);
d85e1fc8 4230 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 4231 return len;
4232 len += ret;
4233
4234 return len;
4235}
4236
4237
4238void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
4239{
4240 if (wpa_auth)
4241 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
4242}
4243
4244
4245int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
4246{
4247 return sm && sm->pairwise_set;
4248}
4249
4250
ff36ff00
JM		 4251int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
4252{
4253 return sm->pairwise;
4254}
4255
4256
b08c9ad0
MK		 4257const u8 * wpa_auth_get_pmk(struct wpa_state_machine *sm, int *len)
4258{
4259 if (!sm)
4260 return NULL;
4261 *len = sm->pmk_len;
4262 return sm->PMK;
4263}
4264
4265
6fc6879b
JM		 4266int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
4267{
4268 if (sm == NULL)
4269 return -1;
4270 return sm->wpa_key_mgmt;
4271}
4272
4273
4274int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
4275{
4276 if (sm == NULL)
4277 return 0;
4278 return sm->wpa;
4279}
4280
4281
0e3bd7ac
MV		 4282int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
4283{
4284 if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
4285 return 0;
4286 return sm->tk_already_set;
4287}
4288
4289
2f1357fb
JM		 4290int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm)
4291{
4292 if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt))
4293 return 0;
4294 return sm->tk_already_set;
4295}
4296
4297
6fc6879b
JM		 4298int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
4299 struct rsn_pmksa_cache_entry *entry)
4300{
4301 if (sm == NULL || sm->pmksa != entry)
4302 return -1;
4303 sm->pmksa = NULL;
4304 return 0;
4305}
4306
4307
4308struct rsn_pmksa_cache_entry *
4309wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
4310{
4311 return sm ? sm->pmksa : NULL;
4312}
4313
4314
4315void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
4316{
4317 if (sm)
4318 sm->dot11RSNAStatsTKIPLocalMICFailures++;
4319}
4320
4321
4322const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
4323{
4324 if (wpa_auth == NULL)
4325 return NULL;
4326 *len = wpa_auth->wpa_ie_len;
4327 return wpa_auth->wpa_ie;
4328}
4329
4330
4331int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 4332 unsigned int pmk_len,
6fc6879b
JM		 4333 int session_timeout, struct eapol_state_machine *eapol)
4334{
cb465555
JM		 4335 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
4336 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 4337 return -1;
4338
64f48093
JM		 4339#ifdef CONFIG_IEEE80211R_AP
4340 if (pmk_len >= 2 * PMK_LEN && wpa_key_mgmt_ft(sm->wpa_key_mgmt) &&
4341 wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
4342 !wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
4343 /* Cache MPMK/XXKey instead of initial part from MSK */
4344 pmk = pmk + PMK_LEN;
4345 pmk_len = PMK_LEN;
4346 } else
4347#endif /* CONFIG_IEEE80211R_AP */
834c5d68 4348 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
207976f0
JM		 4349 if (pmk_len > PMK_LEN_SUITE_B_192)
4350 pmk_len = PMK_LEN_SUITE_B_192;
4351 } else if (pmk_len > PMK_LEN) {
4352 pmk_len = PMK_LEN;
4353 }
4354
64f48093 4355 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK", pmk, pmk_len);
70c93963 4356 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 4357 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 4358 sm->wpa_auth->addr, sm->addr, session_timeout,
4359 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 4360 return 0;
4361
4362 return -1;
4363}
4364
4365
4366int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4367 const u8 *pmk, size_t len, const u8 *sta_addr,
4368 int session_timeout,
4369 struct eapol_state_machine *eapol)
4370{
4371 if (wpa_auth == NULL)
4372 return -1;
4373
64f48093 4374 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from preauth", pmk, len);
70c93963 4375 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 4376 NULL, 0,
4377 wpa_auth->addr,
4bb081f1
JM		 4378 sta_addr, session_timeout, eapol,
4379 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 4380 return 0;
4381
4382 return -1;
4383}
4384
4385
f2991170 4386int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 4387 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 4388{
4389 if (wpa_auth->conf.disable_pmksa_caching)
4390 return -1;
4391
64f48093 4392 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK from SAE", pmk, PMK_LEN);
70c93963 4393 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 4394 NULL, 0,
f2991170
JM		 4395 wpa_auth->addr, addr, 0, NULL,
4396 WPA_KEY_MGMT_SAE))
4397 return 0;
4398
4399 return -1;
4400}
4401
4402
9d94e4bb
JM		 4403void wpa_auth_add_sae_pmkid(struct wpa_state_machine *sm, const u8 *pmkid)
4404{
4405 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4406 sm->pmkid_set = 1;
4407}
4408
4409
0c52953b
JM		 4410int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4411 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4412 int session_timeout, int akmp)
4413{
4414 if (wpa_auth->conf.disable_pmksa_caching)
4415 return -1;
4416
64f48093 4417 wpa_hexdump_key(MSG_DEBUG, "RSN: Cache PMK (2)", pmk, PMK_LEN);
0c52953b
JM		 4418 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4419 NULL, 0, wpa_auth->addr, addr, session_timeout,
4420 NULL, akmp))
4421 return 0;
4422
4423 return -1;
4424}
4425
4426
901d1fe1
JM		 4427void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4428 const u8 *sta_addr)
4429{
4430 struct rsn_pmksa_cache_entry *pmksa;
4431
4432 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4433 return;
4434 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4435 if (pmksa) {
4436 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4437 MACSTR " based on request", MAC2STR(sta_addr));
4438 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4439 }
4440}
4441
4442
b8daac18
MH		 4443int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4444 size_t len)
4445{
4446 if (!wpa_auth || !wpa_auth->pmksa)
4447 return 0;
4448 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4449}
4450
4451
4c522c77
MH		 4452void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4453{
4454 if (wpa_auth && wpa_auth->pmksa)
4455 pmksa_cache_auth_flush(wpa_auth->pmksa);
4456}
4457
4458
4d77d80e
MH		 4459#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4460#ifdef CONFIG_MESH
4461
4462int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4463 char *buf, size_t len)
4464{
4465 if (!wpa_auth || !wpa_auth->pmksa)
4466 return 0;
4467
4468 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4469}
4470
4471
4472struct rsn_pmksa_cache_entry *
4473wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4474 const u8 *pmkid, int expiration)
4475{
4476 struct rsn_pmksa_cache_entry *entry;
4477 struct os_reltime now;
4478
4479 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4480 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4481 if (!entry)
4482 return NULL;
4483
4484 os_get_reltime(&now);
4485 entry->expiration = now.sec + expiration;
4486 return entry;
4487}
4488
4489
4490int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4491 struct rsn_pmksa_cache_entry *entry)
4492{
4493 int ret;
4494
4495 if (!wpa_auth || !wpa_auth->pmksa)
4496 return -1;
4497
4498 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4499 if (ret < 0)
4500 wpa_printf(MSG_DEBUG,
4501 "RSN: Failed to store external PMKSA cache for "
4502 MACSTR, MAC2STR(entry->spa));
4503
4504 return ret;
4505}
4506
4507#endif /* CONFIG_MESH */
4508#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4509
4510
9f2cf23e 4511struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 4512wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4513 const u8 *pmkid)
9f2cf23e
MH		 4514{
4515 if (!wpa_auth || !wpa_auth->pmksa)
4516 return NULL;
c1bd4bac 4517 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 4518}
4519
4520
4521void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4522 struct wpa_state_machine *sm,
4523 struct wpa_authenticator *wpa_auth,
4524 u8 *pmkid, u8 *pmk)
4525{
4526 if (!sm)
4527 return;
4528
4529 sm->pmksa = pmksa;
8854f90b
JM		 4530 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4531 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4532 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 4533}
4534
4535
a0ad9e8c
MB		 4536/*
4537 * Remove and free the group from wpa_authenticator. This is triggered by a
4538 * callback to make sure nobody is currently iterating the group list while it
4539 * gets modified.
4540 */
4541static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4542 struct wpa_group *group)
4543{
4544 struct wpa_group *prev = wpa_auth->group;
4545
4546 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4547 group->vlan_id);
4548
4549 while (prev) {
4550 if (prev->next == group) {
4551 /* This never frees the special first group as needed */
4552 prev->next = group->next;
4553 os_free(group);
4554 break;
4555 }
4556 prev = prev->next;
4557 }
4558
4559}
4560
4561
4562/* Increase the reference counter for group */
4563static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4564 struct wpa_group *group)
4565{
4566 /* Skip the special first group */
4567 if (wpa_auth->group == group)
4568 return;
4569
4570 group->references++;
4571}
4572
4573
4574/* Decrease the reference counter and maybe free the group */
4575static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4576 struct wpa_group *group)
4577{
4578 /* Skip the special first group */
4579 if (wpa_auth->group == group)
4580 return;
4581
4582 group->references--;
4583 if (group->references)
4584 return;
4585 wpa_group_free(wpa_auth, group);
4586}
4587
4588
4589/*
4590 * Add a group that has its references counter set to zero. Caller needs to
4591 * call wpa_group_get() on the return value to mark the entry in use.
4592 */
6fc6879b
JM		 4593static struct wpa_group *
4594wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4595{
4596 struct wpa_group *group;
4597
4598 if (wpa_auth == NULL || wpa_auth->group == NULL)
4599 return NULL;
4600
4601 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4602 vlan_id);
bdffdc5d 4603 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4604 if (group == NULL)
4605 return NULL;
4606
4607 group->next = wpa_auth->group->next;
4608 wpa_auth->group->next = group;
4609
4610 return group;
4611}
4612
4613
7cebc8e2
MB		 4614/*
4615 * Enforce that the group state machine for the VLAN is running, increase
4616 * reference counter as interface is up. References might have been increased
4617 * even if a negative value is returned.
4618 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4619 */
4620int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4621{
4622 struct wpa_group *group;
4623
4624 if (wpa_auth == NULL)
4625 return 0;
4626
4627 group = wpa_auth->group;
4628 while (group) {
4629 if (group->vlan_id == vlan_id)
4630 break;
4631 group = group->next;
4632 }
4633
4634 if (group == NULL) {
4635 group = wpa_auth_add_group(wpa_auth, vlan_id);
4636 if (group == NULL)
4637 return -1;
4638 }
4639
4640 wpa_printf(MSG_DEBUG,
4641 "WPA: Ensure group state machine running for VLAN ID %d",
4642 vlan_id);
4643
4644 wpa_group_get(wpa_auth, group);
4645 group->num_setup_iface++;
4646
4647 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4648 return -1;
4649
4650 return 0;
4651}
4652
4653
4654/*
4655 * Decrease reference counter, expected to be zero afterwards.
4656 * returns: -1 on error (group not found, group in fail state)
4657 * -2 if wpa_group is still referenced
4658 * 0 else
4659 */
4660int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4661{
4662 struct wpa_group *group;
4663 int ret = 0;
4664
4665 if (wpa_auth == NULL)
4666 return 0;
4667
4668 group = wpa_auth->group;
4669 while (group) {
4670 if (group->vlan_id == vlan_id)
4671 break;
4672 group = group->next;
4673 }
4674
4675 if (group == NULL)
4676 return -1;
4677
4678 wpa_printf(MSG_DEBUG,
4679 "WPA: Try stopping group state machine for VLAN ID %d",
4680 vlan_id);
4681
4682 if (group->num_setup_iface <= 0) {
4683 wpa_printf(MSG_ERROR,
4684 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4685 vlan_id);
4686 return -1;
4687 }
4688 group->num_setup_iface--;
4689
4690 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4691 ret = -1;
4692
4693 if (group->references > 1) {
4694 wpa_printf(MSG_DEBUG,
4695 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4696 vlan_id);
4697 ret = -2;
4698 }
4699
4700 wpa_group_put(wpa_auth, group);
4701
4702 return ret;
4703}
4704
4705
6fc6879b
JM		 4706int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4707{
4708 struct wpa_group *group;
4709
4710 if (sm == NULL || sm->wpa_auth == NULL)
4711 return 0;
4712
4713 group = sm->wpa_auth->group;
4714 while (group) {
4715 if (group->vlan_id == vlan_id)
4716 break;
4717 group = group->next;
4718 }
4719
4720 if (group == NULL) {
4721 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4722 if (group == NULL)
4723 return -1;
4724 }
4725
4726 if (sm->group == group)
4727 return 0;
4728
7d7f7be2
JM		 4729 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4730 return -1;
4731
6fc6879b
JM		 4732 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4733 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4734
a0ad9e8c
MB		 4735 wpa_group_get(sm->wpa_auth, group);
4736 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4737 sm->group = group;
a0ad9e8c 4738
6fc6879b
JM		 4739 return 0;
4740}
e4bf4db9
JM		 4741
4742
4743void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4744 struct wpa_state_machine *sm, int ack)
4745{
4746 if (wpa_auth == NULL || sm == NULL)
4747 return;
4748 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4749 " ack=%d", MAC2STR(sm->addr), ack);
4750 if (sm->pending_1_of_4_timeout && ack) {
4751 /*
4752 * Some deployed supplicant implementations update their SNonce
4753 * for each EAPOL-Key 2/4 message even within the same 4-way
4754 * handshake and then fail to use the first SNonce when
4755 * deriving the PTK. This results in unsuccessful 4-way
4756 * handshake whenever the relatively short initial timeout is
4757 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4758 * around this by increasing the timeout now that we know that
4759 * the station has received the frame.
4760 */
4761 int timeout_ms = eapol_key_timeout_subseq;
4762 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4763 "timeout by %u ms because of acknowledged frame",
4764 timeout_ms);
4765 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4766 eloop_register_timeout(timeout_ms / 1000,
4767 (timeout_ms % 1000) * 1000,
4768 wpa_send_eapol_timeout, wpa_auth, sm);
4769 }
3d695328
JM		 4770
4771#ifdef CONFIG_TESTING_OPTIONS
4772 if (sm->eapol_status_cb) {
4773 sm->eapol_status_cb(sm->eapol_status_cb_ctx1,
4774 sm->eapol_status_cb_ctx2);
4775 sm->eapol_status_cb = NULL;
4776 }
4777#endif /* CONFIG_TESTING_OPTIONS */
e4bf4db9 4778}
c10347f2
JM		 4779
4780
4781int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4782{
4783 if (sm == NULL)
4784 return 0;
4785 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4786}
aa189ac9
JM		 4787
4788
4789int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4790{
4791 if (sm == NULL)
4792 return 0;
4793 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4794}
25ef8529
JM		 4795
4796
4797#ifdef CONFIG_P2P
4798int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4799{
4800 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4801 return -1;
4802 os_memcpy(addr, sm->ip_addr, 4);
4803 return 0;
4804}
4805#endif /* CONFIG_P2P */
cbc210de
JM		 4806
4807
4808int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4809 struct radius_das_attrs *attr)
4810{
4811 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4812}
34782730
JM		 4813
4814
4815void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4816{
4817 struct wpa_group *group;
4818
4819 if (!wpa_auth)
4820 return;
4821 for (group = wpa_auth->group; group; group = group->next)
4822 wpa_group_config_group_keys(wpa_auth, group);
4823}
7eace378
JM		 4824
4825
4826#ifdef CONFIG_FILS
4827
4828struct wpa_auth_fils_iter_data {
4829 struct wpa_authenticator *auth;
4830 const u8 *cache_id;
4831 struct rsn_pmksa_cache_entry *pmksa;
4832 const u8 *spa;
4833 const u8 *pmkid;
4834};
4835
4836
4837static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4838{
4839 struct wpa_auth_fils_iter_data *data = ctx;
4840
4cc6574d 4841 if (a == data->auth || !a->conf.fils_cache_id_set ||
7eace378
JM		 4842 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4843 FILS_CACHE_ID_LEN) != 0)
4844 return 0;
4845 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4846 return data->pmksa != NULL;
4847}
4848
4849
4850struct rsn_pmksa_cache_entry *
4851wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4852 const u8 *sta_addr, const u8 *pmkid)
4853{
4854 struct wpa_auth_fils_iter_data idata;
4855
4856 if (!wpa_auth->conf.fils_cache_id_set)
4857 return NULL;
4858 idata.auth = wpa_auth;
4859 idata.cache_id = wpa_auth->conf.fils_cache_id;
4860 idata.pmksa = NULL;
4861 idata.spa = sta_addr;
4862 idata.pmkid = pmkid;
4863 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4864 return idata.pmksa;
4865}
4866
5db997e3
JM		 4867
4868#ifdef CONFIG_IEEE80211R_AP
a7968ea5
JM		 4869int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, int use_sha384,
4870 u8 *buf, size_t len)
5db997e3
JM		 4871{
4872 struct wpa_auth_config *conf = &wpa_auth->conf;
4873
a7968ea5 4874 return wpa_write_ftie(conf, use_sha384, conf->r0_key_holder,
5db997e3
JM		 4875 conf->r0_key_holder_len,
4876 NULL, NULL, buf, len, NULL, 0);
4877}
4878#endif /* CONFIG_IEEE80211R_AP */
4879
8acbf85f
JM		 4880
4881void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4882 u8 *fils_anonce, u8 *fils_snonce,
4883 u8 *fils_kek, size_t *fils_kek_len)
4884{
4885 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4886 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4887 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4888 *fils_kek_len = sm->PTK.kek_len;
4889}
4890
a40bd06e
JM		 4891
4892void wpa_auth_add_fils_pmk_pmkid(struct wpa_state_machine *sm, const u8 *pmk,
4893 size_t pmk_len, const u8 *pmkid)
4894{
4895 os_memcpy(sm->PMK, pmk, pmk_len);
4896 sm->pmk_len = pmk_len;
4897 os_memcpy(sm->pmkid, pmkid, PMKID_LEN);
4898 sm->pmkid_set = 1;
4899}
4900
7eace378 4901#endif /* CONFIG_FILS */
6bc2f00f
JM		 4902
4903
36536639
JM		 4904void wpa_auth_set_auth_alg(struct wpa_state_machine *sm, u16 auth_alg)
4905{
4906 if (sm)
4907 sm->auth_alg = auth_alg;
4908}
4909
4910
10ec6a5f
JM		 4911#ifdef CONFIG_DPP2
4912void wpa_auth_set_dpp_z(struct wpa_state_machine *sm, const struct wpabuf *z)
4913{
4914 if (sm) {
4915 wpabuf_clear_free(sm->dpp_z);
4916 sm->dpp_z = z ? wpabuf_dup(z) : NULL;
4917 }
4918}
4919#endif /* CONFIG_DPP2 */
4920
4921
82424732 4922#ifdef CONFIG_TESTING_OPTIONS
d8afdb21 4923
3d695328
JM		 4924int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce,
4925 void (*cb)(void *ctx1, void *ctx2),
4926 void *ctx1, void *ctx2)
d8afdb21
JM		 4927{
4928 const u8 *anonce = sm->ANonce;
4929 u8 anonce_buf[WPA_NONCE_LEN];
4930
4931 if (change_anonce) {
4932 if (random_get_bytes(anonce_buf, WPA_NONCE_LEN))
4933 return -1;
4934 anonce = anonce_buf;
4935 }
4936
4937 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4938 "sending 1/4 msg of 4-Way Handshake (TESTING)");
4939 wpa_send_eapol(sm->wpa_auth, sm,
4940 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
4941 anonce, NULL, 0, 0, 0);
4942 return 0;
4943}
4944
4945
3d695328
JM		 4946int wpa_auth_resend_m3(struct wpa_state_machine *sm,
4947 void (*cb)(void *ctx1, void *ctx2),
4948 void *ctx1, void *ctx2)
d8afdb21 4949{
0c3bc1be 4950 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
0c3bc1be 4951 u8 *opos;
d8afdb21
JM		 4952 size_t gtk_len, kde_len;
4953 struct wpa_group *gsm = sm->group;
4954 u8 *wpa_ie;
7a4b01c8 4955 int wpa_ie_len, secure, gtkidx, encr = 0;
d8afdb21
JM		 4956
4957 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
4958 GTK[GN], IGTK, [FTIE], [TIE * 2])
4959 */
4960
4961 /* Use 0 RSC */
4962 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4963 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
4964 wpa_ie = sm->wpa_auth->wpa_ie;
4965 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
4966 if (sm->wpa == WPA_VERSION_WPA &&
4967 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
4968 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
4969 /* WPA-only STA, remove RSN IE and possible MDIE */
4970 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4971 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
4972 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4973 wpa_ie_len = wpa_ie[1] + 2;
4974 }
4975 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4976 "sending 3/4 msg of 4-Way Handshake (TESTING)");
4977 if (sm->wpa == WPA_VERSION_WPA2) {
4978 /* WPA2 send GTK in the 4-way handshake */
4979 secure = 1;
4980 gtk = gsm->GTK[gsm->GN - 1];
4981 gtk_len = gsm->GTK_len;
7a4b01c8 4982 gtkidx = gsm->GN;
d8afdb21
JM		 4983 _rsc = rsc;
4984 encr = 1;
4985 } else {
4986 /* WPA does not include GTK in msg 3/4 */
4987 secure = 0;
4988 gtk = NULL;
4989 gtk_len = 0;
d8afdb21
JM		 4990 _rsc = NULL;
4991 if (sm->rx_eapol_key_secure) {
4992 /*
4993 * It looks like Windows 7 supplicant tries to use
4994 * Secure bit in msg 2/4 after having reported Michael
4995 * MIC failure and it then rejects the 4-way handshake
4996 * if msg 3/4 does not set Secure bit. Work around this
4997 * by setting the Secure bit here even in the case of
4998 * WPA if the supplicant used it first.
4999 */
5000 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5001 "STA used Secure bit in WPA msg 2/4 - "
5002 "set Secure for 3/4 as workaround");
5003 secure = 1;
5004 }
5005 }
5006
17c2559c 5007 kde_len = wpa_ie_len + ieee80211w_kde_len(sm) + ocv_oci_len(sm);
d8afdb21
JM		 5008 if (gtk)
5009 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
5010#ifdef CONFIG_IEEE80211R_AP
5011 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5012 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
5013 kde_len += 300; /* FTIE + 2 * TIE */
5014 }
5015#endif /* CONFIG_IEEE80211R_AP */
5016 kde = os_malloc(kde_len);
5017 if (kde == NULL)
5018 return -1;
5019
5020 pos = kde;
5021 os_memcpy(pos, wpa_ie, wpa_ie_len);
5022 pos += wpa_ie_len;
5023#ifdef CONFIG_IEEE80211R_AP
5024 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5025 int res;
5026 size_t elen;
5027
5028 elen = pos - kde;
5029 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
5030 if (res < 0) {
5031 wpa_printf(MSG_ERROR, "FT: Failed to insert "
5032 "PMKR1Name into RSN IE in EAPOL-Key data");
5033 os_free(kde);
5034 return -1;
5035 }
5036 pos -= wpa_ie_len;
5037 pos += elen;
5038 }
5039#endif /* CONFIG_IEEE80211R_AP */
5040 if (gtk) {
5041 u8 hdr[2];
7a4b01c8 5042 hdr[0] = gtkidx & 0x03;
d8afdb21
JM		 5043 hdr[1] = 0;
5044 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5045 gtk, gtk_len);
5046 }
5047 opos = pos;
5048 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 5049 if (pos - opos >= 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5050 /* skip KDE header and keyid */
5051 opos += 2 + RSN_SELECTOR_LEN + 2;
d8afdb21
JM		 5052 os_memset(opos, 0, 6); /* clear PN */
5053 }
17c2559c
MV		 5054 if (ocv_oci_add(sm, &pos) < 0) {
5055 os_free(kde);
5056 return -1;
5057 }
d8afdb21
JM		 5058
5059#ifdef CONFIG_IEEE80211R_AP
5060 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
5061 int res;
5062 struct wpa_auth_config *conf;
5063
5064 conf = &sm->wpa_auth->conf;
5065 if (sm->assoc_resp_ftie &&
5066 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
5067 os_memcpy(pos, sm->assoc_resp_ftie,
5068 2 + sm->assoc_resp_ftie[1]);
5069 res = 2 + sm->assoc_resp_ftie[1];
5070 } else {
a7968ea5
JM		 5071 int use_sha384 = wpa_key_mgmt_sha384(sm->wpa_key_mgmt);
5072
5073 res = wpa_write_ftie(conf, use_sha384,
5074 conf->r0_key_holder,
d8afdb21
JM		 5075 conf->r0_key_holder_len,
5076 NULL, NULL, pos,
5077 kde + kde_len - pos,
5078 NULL, 0);
5079 }
5080 if (res < 0) {
5081 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
5082 "into EAPOL-Key Key Data");
5083 os_free(kde);
5084 return -1;
5085 }
5086 pos += res;
5087
5088 /* TIE[ReassociationDeadline] (TU) */
5089 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5090 *pos++ = 5;
5091 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
5092 WPA_PUT_LE32(pos, conf->reassociation_deadline);
5093 pos += 4;
5094
5095 /* TIE[KeyLifetime] (seconds) */
5096 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
5097 *pos++ = 5;
5098 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
83fe4bd3 5099 WPA_PUT_LE32(pos, conf->r0_key_lifetime);
d8afdb21
JM		 5100 pos += 4;
5101 }
5102#endif /* CONFIG_IEEE80211R_AP */
5103
5104 wpa_send_eapol(sm->wpa_auth, sm,
5105 (secure ? WPA_KEY_INFO_SECURE : 0) |
5106 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5107 WPA_KEY_INFO_MIC : 0) |
5108 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
5109 WPA_KEY_INFO_KEY_TYPE,
7a4b01c8 5110 _rsc, sm->ANonce, kde, pos - kde, 0, encr);
d8afdb21
JM		 5111 os_free(kde);
5112 return 0;
5113}
5114
5115
3d695328
JM		 5116int wpa_auth_resend_group_m1(struct wpa_state_machine *sm,
5117 void (*cb)(void *ctx1, void *ctx2),
5118 void *ctx1, void *ctx2)
6bc2f00f
JM		 5119{
5120 u8 rsc[WPA_KEY_RSC_LEN];
5121 struct wpa_group *gsm = sm->group;
5122 const u8 *kde;
0c3bc1be 5123 u8 *kde_buf = NULL, *pos, hdr[2];
0c3bc1be 5124 u8 *opos;
6bc2f00f
JM		 5125 size_t kde_len;
5126 u8 *gtk;
5127
5128 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
5129 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
5130 /* Use 0 RSC */
5131 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
5132 "sending 1/2 msg of Group Key Handshake (TESTING)");
5133
5134 gtk = gsm->GTK[gsm->GN - 1];
5135 if (sm->wpa == WPA_VERSION_WPA2) {
5136 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
17c2559c 5137 ieee80211w_kde_len(sm) + ocv_oci_len(sm);
6bc2f00f
JM		 5138 kde_buf = os_malloc(kde_len);
5139 if (kde_buf == NULL)
5140 return -1;
5141
5142 kde = pos = kde_buf;
5143 hdr[0] = gsm->GN & 0x03;
5144 hdr[1] = 0;
5145 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
5146 gtk, gsm->GTK_len);
5147 opos = pos;
5148 pos = ieee80211w_kde_add(sm, pos);
9f917339
MV		 5149 if (pos - opos >=
5150 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN) {
5151 /* skip KDE header and keyid */
5152 opos += 2 + RSN_SELECTOR_LEN + 2;
6bc2f00f
JM		 5153 os_memset(opos, 0, 6); /* clear PN */
5154 }
17c2559c
MV		 5155 if (ocv_oci_add(sm, &pos) < 0) {
5156 os_free(kde_buf);
5157 return -1;
5158 }
6bc2f00f
JM		 5159 kde_len = pos - kde;
5160 } else {
5161 kde = gtk;
5162 kde_len = gsm->GTK_len;
5163 }
5164
3d695328
JM		 5165 sm->eapol_status_cb = cb;
5166 sm->eapol_status_cb_ctx1 = ctx1;
5167 sm->eapol_status_cb_ctx2 = ctx2;
5168
6bc2f00f
JM		 5169 wpa_send_eapol(sm->wpa_auth, sm,
5170 WPA_KEY_INFO_SECURE |
5171 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
5172 WPA_KEY_INFO_MIC : 0) |
5173 WPA_KEY_INFO_ACK |
5174 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
5175 rsc, NULL, kde, kde_len, gsm->GN, 1);
5176
5177 os_free(kde_buf);
5178 return 0;
5179}
d8afdb21 5180
92662fb2
JB		 5181
5182int wpa_auth_rekey_gtk(struct wpa_authenticator *wpa_auth)
5183{
5184 if (!wpa_auth)
5185 return -1;
5186 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
5187 return eloop_register_timeout(0, 0, wpa_rekey_gtk, wpa_auth, NULL);
5188}
5189
6bc2f00f 5190#endif /* CONFIG_TESTING_OPTIONS */
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