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DPP: Update AES-SIV AD for PKEX frames
[thirdparty/hostap.git] / src / ap / wpa_auth.c
CommitLineData
6fc6879b 1/*
00338a4f 2 * IEEE 802.11 RSN / WPA Authenticator
98cd3d1c 3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
6fc6879b 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
6226e38d 9#include "utils/includes.h"
6fc6879b 10
6226e38d
JM		 11#include "utils/common.h"
12#include "utils/eloop.h"
13#include "utils/state_machine.h"
25ef8529 14#include "utils/bitfield.h"
81f4f619 15#include "common/ieee802_11_defs.h"
3b5b7aa8 16#include "crypto/aes.h"
03da66bd 17#include "crypto/aes_wrap.h"
3b5b7aa8 18#include "crypto/aes_siv.h"
03da66bd
JM		 19#include "crypto/crypto.h"
20#include "crypto/sha1.h"
21#include "crypto/sha256.h"
3642c431 22#include "crypto/random.h"
281c950b 23#include "eapol_auth/eapol_auth_sm.h"
6226e38d 24#include "ap_config.h"
6fc6879b 25#include "ieee802_11.h"
6226e38d
JM		 26#include "wpa_auth.h"
27#include "pmksa_cache_auth.h"
6fc6879b
JM		 28#include "wpa_auth_i.h"
29#include "wpa_auth_ie.h"
30
31#define STATE_MACHINE_DATA struct wpa_state_machine
32#define STATE_MACHINE_DEBUG_PREFIX "WPA"
33#define STATE_MACHINE_ADDR sm->addr
34
35
36static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
e4a6ea1d 37static int wpa_sm_step(struct wpa_state_machine *sm);
567da5bb
JM		 38static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
39 u8 *data, size_t data_len);
75c8563e
JM		 40#ifdef CONFIG_FILS
41static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
42 u8 *buf, size_t buf_len, u16 *_key_data_len);
9392859d
JM		 43static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
44 const struct wpabuf *hlp);
75c8563e 45#endif /* CONFIG_FILS */
6fc6879b
JM		 46static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
47static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
48 struct wpa_group *group);
581a8cde 49static void wpa_request_new_ptk(struct wpa_state_machine *sm);
e6965d4e
JM		 50static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
51 struct wpa_group *group);
1bdb7ab3
JM		 52static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
53 struct wpa_group *group);
f23c5b17 54static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 55 const u8 *pmk, unsigned int pmk_len,
56 struct wpa_ptk *ptk);
a0ad9e8c
MB		 57static void wpa_group_free(struct wpa_authenticator *wpa_auth,
58 struct wpa_group *group);
59static void wpa_group_get(struct wpa_authenticator *wpa_auth,
60 struct wpa_group *group);
61static void wpa_group_put(struct wpa_authenticator *wpa_auth,
62 struct wpa_group *group);
e73ffa09 63static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos);
6fc6879b 64
bae61562
JM		 65static const u32 eapol_key_timeout_first = 100; /* ms */
66static const u32 eapol_key_timeout_subseq = 1000; /* ms */
00338a4f 67static const u32 eapol_key_timeout_first_group = 500; /* ms */
6f234c1e 68static const u32 eapol_key_timeout_no_retrans = 4000; /* ms */
6fc6879b
JM		 69
70/* TODO: make these configurable */
71static const int dot11RSNAConfigPMKLifetime = 43200;
72static const int dot11RSNAConfigPMKReauthThreshold = 70;
73static const int dot11RSNAConfigSATimeout = 60;
74
75
c772d054 76static inline int wpa_auth_mic_failure_report(
6fc6879b
JM		 77 struct wpa_authenticator *wpa_auth, const u8 *addr)
78{
cef8fac0
JB		 79 if (wpa_auth->cb->mic_failure_report)
80 return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
c772d054 81 return 0;
6fc6879b
JM		 82}
83
84
2c502460
JM		 85static inline void wpa_auth_psk_failure_report(
86 struct wpa_authenticator *wpa_auth, const u8 *addr)
87{
cef8fac0
JB		 88 if (wpa_auth->cb->psk_failure_report)
89 wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
2c502460
JM		 90}
91
92
6fc6879b
JM		 93static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
94 const u8 *addr, wpa_eapol_variable var,
95 int value)
96{
cef8fac0
JB		 97 if (wpa_auth->cb->set_eapol)
98 wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
6fc6879b
JM		 99}
100
101
102static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
103 const u8 *addr, wpa_eapol_variable var)
104{
cef8fac0 105 if (wpa_auth->cb->get_eapol == NULL)
6fc6879b 106 return -1;
cef8fac0 107 return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
6fc6879b
JM		 108}
109
110
111static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
759fd76b
JM		 112 const u8 *addr,
113 const u8 *p2p_dev_addr,
7a12edd1 114 const u8 *prev_psk, size_t *psk_len)
6fc6879b 115{
cef8fac0 116 if (wpa_auth->cb->get_psk == NULL)
6fc6879b 117 return NULL;
cef8fac0 118 return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
7a12edd1 119 prev_psk, psk_len);
6fc6879b
JM		 120}
121
122
123static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
124 const u8 *addr, u8 *msk, size_t *len)
125{
cef8fac0 126 if (wpa_auth->cb->get_msk == NULL)
6fc6879b 127 return -1;
cef8fac0 128 return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
6fc6879b
JM		 129}
130
131
132static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
133 int vlan_id,
71934751 134 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 135 u8 *key, size_t key_len)
136{
cef8fac0 137 if (wpa_auth->cb->set_key == NULL)
6fc6879b 138 return -1;
cef8fac0
JB		 139 return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
140 key, key_len);
6fc6879b
JM		 141}
142
143
144static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
145 const u8 *addr, int idx, u8 *seq)
146{
cef8fac0 147 if (wpa_auth->cb->get_seqnum == NULL)
6fc6879b 148 return -1;
cef8fac0 149 return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
6fc6879b
JM		 150}
151
152
6fc6879b
JM		 153static inline int
154wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
155 const u8 *data, size_t data_len, int encrypt)
156{
cef8fac0 157 if (wpa_auth->cb->send_eapol == NULL)
6fc6879b 158 return -1;
cef8fac0
JB		 159 return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
160 encrypt);
6fc6879b
JM		 161}
162
163
c50d94f1
BC		 164#ifdef CONFIG_MESH
165static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
166 const u8 *addr)
167{
cef8fac0 168 if (wpa_auth->cb->start_ampe == NULL)
c50d94f1 169 return -1;
cef8fac0 170 return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
c50d94f1
BC		 171}
172#endif /* CONFIG_MESH */
173
174
6fc6879b
JM		 175int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
176 int (*cb)(struct wpa_state_machine *sm, void *ctx),
177 void *cb_ctx)
178{
cef8fac0 179 if (wpa_auth->cb->for_each_sta == NULL)
6fc6879b 180 return 0;
cef8fac0 181 return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
6fc6879b
JM		 182}
183
184
bf98f7f3
JM		 185int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
186 int (*cb)(struct wpa_authenticator *a, void *ctx),
187 void *cb_ctx)
188{
cef8fac0 189 if (wpa_auth->cb->for_each_auth == NULL)
bf98f7f3 190 return 0;
cef8fac0 191 return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
bf98f7f3
JM		 192}
193
194
6fc6879b
JM		 195void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
196 logger_level level, const char *txt)
197{
cef8fac0 198 if (wpa_auth->cb->logger == NULL)
6fc6879b 199 return;
cef8fac0 200 wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
6fc6879b
JM		 201}
202
203
204void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
205 logger_level level, const char *fmt, ...)
206{
207 char *format;
208 int maxlen;
209 va_list ap;
210
cef8fac0 211 if (wpa_auth->cb->logger == NULL)
6fc6879b
JM		 212 return;
213
214 maxlen = os_strlen(fmt) + 100;
215 format = os_malloc(maxlen);
216 if (!format)
217 return;
218
219 va_start(ap, fmt);
220 vsnprintf(format, maxlen, fmt, ap);
221 va_end(ap);
222
223 wpa_auth_logger(wpa_auth, addr, level, format);
224
225 os_free(format);
226}
227
228
229static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
567da5bb 230 const u8 *addr, u16 reason)
6fc6879b 231{
cef8fac0 232 if (wpa_auth->cb->disconnect == NULL)
6fc6879b 233 return;
567da5bb
JM		 234 wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR " (reason %u)",
235 MAC2STR(addr), reason);
236 wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr, reason);
6fc6879b
JM		 237}
238
239
240static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
241{
56586197 242 int ret = 0;
4ec1fd8e 243#ifdef CONFIG_IEEE80211R_AP
56586197
JM		 244 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
245 ret = 1;
4ec1fd8e 246#endif /* CONFIG_IEEE80211R_AP */
56586197
JM		 247#ifdef CONFIG_IEEE80211W
248 if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
249 ret = 1;
250#endif /* CONFIG_IEEE80211W */
a14896e8
JM		 251 if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
252 ret = 1;
56586197 253 return ret;
6fc6879b
JM		 254}
255
256
257static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
258{
259 struct wpa_authenticator *wpa_auth = eloop_ctx;
260
3642c431 261 if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
6fc6879b
JM		 262 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
263 "initialization.");
264 } else {
265 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
5cb9d5c3
JM		 266 wpa_hexdump_key(MSG_DEBUG, "GMK",
267 wpa_auth->group->GMK, WPA_GMK_LEN);
6fc6879b
JM		 268 }
269
270 if (wpa_auth->conf.wpa_gmk_rekey) {
271 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
272 wpa_rekey_gmk, wpa_auth, NULL);
273 }
274}
275
276
277static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
278{
279 struct wpa_authenticator *wpa_auth = eloop_ctx;
a0ad9e8c 280 struct wpa_group *group, *next;
6fc6879b
JM		 281
282 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
a0ad9e8c
MB		 283 group = wpa_auth->group;
284 while (group) {
285 wpa_group_get(wpa_auth, group);
286
6fc6879b
JM		 287 group->GTKReKey = TRUE;
288 do {
289 group->changed = FALSE;
290 wpa_group_sm_step(wpa_auth, group);
291 } while (group->changed);
a0ad9e8c
MB		 292
293 next = group->next;
294 wpa_group_put(wpa_auth, group);
295 group = next;
6fc6879b
JM		 296 }
297
298 if (wpa_auth->conf.wpa_group_rekey) {
299 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
300 0, wpa_rekey_gtk, wpa_auth, NULL);
301 }
302}
303
304
581a8cde
JM		 305static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
306{
307 struct wpa_authenticator *wpa_auth = eloop_ctx;
308 struct wpa_state_machine *sm = timeout_ctx;
309
310 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
311 wpa_request_new_ptk(sm);
312 wpa_sm_step(sm);
313}
314
315
6fc6879b
JM		 316static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
317{
318 if (sm->pmksa == ctx)
319 sm->pmksa = NULL;
320 return 0;
321}
322
323
324static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
325 void *ctx)
326{
327 struct wpa_authenticator *wpa_auth = ctx;
328 wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
329}
330
331
1bdb7ab3
JM		 332static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
333 struct wpa_group *group)
334{
559cdabb 335 u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
1bdb7ab3 336 u8 rkey[32];
559cdabb 337 unsigned long ptr;
1bdb7ab3 338
3642c431 339 if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
1bdb7ab3
JM		 340 return -1;
341 wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
342
343 /*
344 * Counter = PRF-256(Random number, "Init Counter",
345 * Local MAC Address || Time)
346 */
347 os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
348 wpa_get_ntp_timestamp(buf + ETH_ALEN);
559cdabb
JM		 349 ptr = (unsigned long) group;
350 os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
3642c431 351 if (random_get_bytes(rkey, sizeof(rkey)) < 0)
1bdb7ab3
JM		 352 return -1;
353
354 if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
355 group->Counter, WPA_NONCE_LEN) < 0)
356 return -1;
357 wpa_hexdump_key(MSG_DEBUG, "Key Counter",
358 group->Counter, WPA_NONCE_LEN);
359
360 return 0;
361}
362
363
e6965d4e 364static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
bdffdc5d 365 int vlan_id, int delay_init)
e6965d4e
JM		 366{
367 struct wpa_group *group;
e6965d4e
JM		 368
369 group = os_zalloc(sizeof(struct wpa_group));
370 if (group == NULL)
371 return NULL;
372
373 group->GTKAuthenticator = TRUE;
374 group->vlan_id = vlan_id;
c3550295 375 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
6fc6879b 376
08704cd8
JM		 377 if (random_pool_ready() != 1) {
378 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
379 "for secure operations - update keys later when "
380 "the first station connects");
381 }
382
1bdb7ab3
JM		 383 /*
384 * Set initial GMK/Counter value here. The actual values that will be
385 * used in negotiations will be set once the first station tries to
386 * connect. This allows more time for collecting additional randomness
387 * on embedded devices.
6fc6879b 388 */
1bdb7ab3 389 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
6fc6879b
JM		 390 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
391 "initialization.");
392 os_free(group);
393 return NULL;
394 }
6fc6879b
JM		 395
396 group->GInit = TRUE;
bdffdc5d
JM		 397 if (delay_init) {
398 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
399 "until Beacon frames have been configured");
400 /* Initialization is completed in wpa_init_keys(). */
401 } else {
402 wpa_group_sm_step(wpa_auth, group);
403 group->GInit = FALSE;
404 wpa_group_sm_step(wpa_auth, group);
405 }
6fc6879b
JM		 406
407 return group;
408}
409
410
411/**
412 * wpa_init - Initialize WPA authenticator
413 * @addr: Authenticator address
414 * @conf: Configuration for WPA authenticator
a17df5fb 415 * @cb: Callback functions for WPA authenticator
6fc6879b
JM		 416 * Returns: Pointer to WPA authenticator data or %NULL on failure
417 */
418struct wpa_authenticator * wpa_init(const u8 *addr,
419 struct wpa_auth_config *conf,
cef8fac0
JB		 420 const struct wpa_auth_callbacks *cb,
421 void *cb_ctx)
6fc6879b
JM		 422{
423 struct wpa_authenticator *wpa_auth;
424
425 wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
426 if (wpa_auth == NULL)
427 return NULL;
428 os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
429 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
cef8fac0
JB		 430 wpa_auth->cb = cb;
431 wpa_auth->cb_ctx = cb_ctx;
6fc6879b
JM		 432
433 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
434 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
435 os_free(wpa_auth);
436 return NULL;
437 }
438
bdffdc5d 439 wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
6fc6879b
JM		 440 if (wpa_auth->group == NULL) {
441 os_free(wpa_auth->wpa_ie);
442 os_free(wpa_auth);
443 return NULL;
444 }
445
4bb081f1
JM		 446 wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
447 wpa_auth);
6fc6879b
JM		 448 if (wpa_auth->pmksa == NULL) {
449 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
27d9701d 450 os_free(wpa_auth->group);
6fc6879b
JM		 451 os_free(wpa_auth->wpa_ie);
452 os_free(wpa_auth);
453 return NULL;
454 }
455
4ec1fd8e 456#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 457 wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
458 if (wpa_auth->ft_pmk_cache == NULL) {
459 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
27d9701d 460 os_free(wpa_auth->group);
6fc6879b 461 os_free(wpa_auth->wpa_ie);
4bb081f1 462 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b
JM		 463 os_free(wpa_auth);
464 return NULL;
465 }
4ec1fd8e 466#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 467
468 if (wpa_auth->conf.wpa_gmk_rekey) {
469 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
470 wpa_rekey_gmk, wpa_auth, NULL);
471 }
472
473 if (wpa_auth->conf.wpa_group_rekey) {
474 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
475 wpa_rekey_gtk, wpa_auth, NULL);
476 }
477
25ef8529
JM		 478#ifdef CONFIG_P2P
479 if (WPA_GET_BE32(conf->ip_addr_start)) {
480 int count = WPA_GET_BE32(conf->ip_addr_end) -
481 WPA_GET_BE32(conf->ip_addr_start) + 1;
482 if (count > 1000)
483 count = 1000;
484 if (count > 0)
485 wpa_auth->ip_pool = bitfield_alloc(count);
486 }
487#endif /* CONFIG_P2P */
488
6fc6879b
JM		 489 return wpa_auth;
490}
491
492
bdffdc5d
JM		 493int wpa_init_keys(struct wpa_authenticator *wpa_auth)
494{
495 struct wpa_group *group = wpa_auth->group;
496
497 wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
498 "keys");
499 wpa_group_sm_step(wpa_auth, group);
500 group->GInit = FALSE;
501 wpa_group_sm_step(wpa_auth, group);
7d7f7be2
JM		 502 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
503 return -1;
bdffdc5d
JM		 504 return 0;
505}
506
507
6fc6879b
JM		 508/**
509 * wpa_deinit - Deinitialize WPA authenticator
510 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
511 */
512void wpa_deinit(struct wpa_authenticator *wpa_auth)
513{
514 struct wpa_group *group, *prev;
515
516 eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
517 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
518
4bb081f1 519 pmksa_cache_auth_deinit(wpa_auth->pmksa);
6fc6879b 520
4ec1fd8e 521#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 522 wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
523 wpa_auth->ft_pmk_cache = NULL;
eefe8630 524 wpa_ft_deinit(wpa_auth);
4ec1fd8e 525#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 526
25ef8529
JM		 527#ifdef CONFIG_P2P
528 bitfield_free(wpa_auth->ip_pool);
529#endif /* CONFIG_P2P */
530
531
6fc6879b
JM		 532 os_free(wpa_auth->wpa_ie);
533
534 group = wpa_auth->group;
535 while (group) {
536 prev = group;
537 group = group->next;
538 os_free(prev);
539 }
540
541 os_free(wpa_auth);
542}
543
544
545/**
546 * wpa_reconfig - Update WPA authenticator configuration
547 * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
548 * @conf: Configuration for WPA authenticator
549 */
550int wpa_reconfig(struct wpa_authenticator *wpa_auth,
551 struct wpa_auth_config *conf)
552{
e6965d4e 553 struct wpa_group *group;
6fc6879b
JM		 554 if (wpa_auth == NULL)
555 return 0;
556
557 os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
ad08c363
JM		 558 if (wpa_auth_gen_wpa_ie(wpa_auth)) {
559 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
560 return -1;
561 }
562
e6965d4e
JM		 563 /*
564 * Reinitialize GTK to make sure it is suitable for the new
565 * configuration.
566 */
567 group = wpa_auth->group;
c3550295 568 group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
e6965d4e
JM		 569 group->GInit = TRUE;
570 wpa_group_sm_step(wpa_auth, group);
571 group->GInit = FALSE;
572 wpa_group_sm_step(wpa_auth, group);
573
6fc6879b
JM		 574 return 0;
575}
576
577
578struct wpa_state_machine *
94ddef3e
JM		 579wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
580 const u8 *p2p_dev_addr)
6fc6879b
JM		 581{
582 struct wpa_state_machine *sm;
583
7d7f7be2
JM		 584 if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
585 return NULL;
586
6fc6879b
JM		 587 sm = os_zalloc(sizeof(struct wpa_state_machine));
588 if (sm == NULL)
589 return NULL;
590 os_memcpy(sm->addr, addr, ETH_ALEN);
94ddef3e
JM		 591 if (p2p_dev_addr)
592 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
6fc6879b
JM		 593
594 sm->wpa_auth = wpa_auth;
595 sm->group = wpa_auth->group;
a0ad9e8c 596 wpa_group_get(sm->wpa_auth, sm->group);
6fc6879b
JM		 597
598 return sm;
599}
600
601
6f9b5d16
JM		 602int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
603 struct wpa_state_machine *sm)
6fc6879b
JM		 604{
605 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
6f9b5d16 606 return -1;
6fc6879b 607
4ec1fd8e 608#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 609 if (sm->ft_completed) {
610 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
611 "FT authentication already completed - do not "
612 "start 4-way handshake");
3d4d2348
JM		 613 /* Go to PTKINITDONE state to allow GTK rekeying */
614 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 615 sm->Pair = TRUE;
6f9b5d16 616 return 0;
6fc6879b 617 }
4ec1fd8e 618#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 619
07e0117d
JM		 620#ifdef CONFIG_FILS
621 if (sm->fils_completed) {
622 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
623 "FILS authentication already completed - do not start 4-way handshake");
624 /* Go to PTKINITDONE state to allow GTK rekeying */
625 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
3bbc4705 626 sm->Pair = TRUE;
07e0117d
JM		 627 return 0;
628 }
629#endif /* CONFIG_FILS */
630
6fc6879b 631 if (sm->started) {
22a299ee 632 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
6fc6879b 633 sm->ReAuthenticationRequest = TRUE;
6f9b5d16 634 return wpa_sm_step(sm);
6fc6879b
JM		 635 }
636
637 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
638 "start authentication");
639 sm->started = 1;
640
641 sm->Init = TRUE;
e4a6ea1d 642 if (wpa_sm_step(sm) == 1)
6f9b5d16 643 return 1; /* should not really happen */
6fc6879b
JM		 644 sm->Init = FALSE;
645 sm->AuthenticationRequest = TRUE;
6f9b5d16 646 return wpa_sm_step(sm);
6fc6879b
JM		 647}
648
649
a8d05fca
JM		 650void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
651{
652 /* WPA/RSN was not used - clear WPA state. This is needed if the STA
653 * reassociates back to the same AP while the previous entry for the
654 * STA has not yet been removed. */
655 if (sm == NULL)
656 return;
657
658 sm->wpa_key_mgmt = 0;
659}
660
661
6fc6879b
JM		 662static void wpa_free_sta_sm(struct wpa_state_machine *sm)
663{
25ef8529
JM		 664#ifdef CONFIG_P2P
665 if (WPA_GET_BE32(sm->ip_addr)) {
666 u32 start;
667 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
668 "address %u.%u.%u.%u from " MACSTR,
669 sm->ip_addr[0], sm->ip_addr[1],
670 sm->ip_addr[2], sm->ip_addr[3],
671 MAC2STR(sm->addr));
672 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
673 bitfield_clear(sm->wpa_auth->ip_pool,
674 WPA_GET_BE32(sm->ip_addr) - start);
675 }
676#endif /* CONFIG_P2P */
2ade8ef2
JM		 677 if (sm->GUpdateStationKeys) {
678 sm->group->GKeyDoneStations--;
679 sm->GUpdateStationKeys = FALSE;
680 }
4ec1fd8e 681#ifdef CONFIG_IEEE80211R_AP
0f857f43 682 os_free(sm->assoc_resp_ftie);
692ec305 683 wpabuf_free(sm->ft_pending_req_ies);
4ec1fd8e 684#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 685 os_free(sm->last_rx_eapol_key);
686 os_free(sm->wpa_ie);
a0ad9e8c 687 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b
JM		 688 os_free(sm);
689}
690
691
692void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
693{
694 if (sm == NULL)
695 return;
696
697 if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
698 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
699 "strict rekeying - force GTK rekey since STA "
700 "is leaving");
701 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
702 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
703 NULL);
704 }
705
706 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
e4bf4db9 707 sm->pending_1_of_4_timeout = 0;
6fc6879b 708 eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
581a8cde 709 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3a46cf93
MB		 710#ifdef CONFIG_IEEE80211R_AP
711 wpa_ft_sta_deinit(sm);
712#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 713 if (sm->in_step_loop) {
714 /* Must not free state machine while wpa_sm_step() is running.
715 * Freeing will be completed in the end of wpa_sm_step(). */
716 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
717 "machine deinit for " MACSTR, MAC2STR(sm->addr));
718 sm->pending_deinit = 1;
719 } else
720 wpa_free_sta_sm(sm);
721}
722
723
724static void wpa_request_new_ptk(struct wpa_state_machine *sm)
725{
726 if (sm == NULL)
727 return;
728
729 sm->PTKRequest = TRUE;
730 sm->PTK_valid = 0;
731}
732
733
68921e24 734static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
22a299ee
JM		 735 const u8 *replay_counter)
736{
737 int i;
738 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
68921e24 739 if (!ctr[i].valid)
22a299ee 740 break;
68921e24 741 if (os_memcmp(replay_counter, ctr[i].counter,
22a299ee
JM		 742 WPA_REPLAY_COUNTER_LEN) == 0)
743 return 1;
744 }
745 return 0;
746}
747
748
68921e24
JM		 749static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
750 const u8 *replay_counter)
751{
752 int i;
753 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
754 if (ctr[i].valid &&
755 (replay_counter == NULL ||
756 os_memcmp(replay_counter, ctr[i].counter,
757 WPA_REPLAY_COUNTER_LEN) == 0))
758 ctr[i].valid = FALSE;
759 }
760}
761
762
4ec1fd8e 763#ifdef CONFIG_IEEE80211R_AP
0f857f43
JM		 764static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
765 struct wpa_state_machine *sm,
766 struct wpa_eapol_ie_parse *kde)
767{
768 struct wpa_ie_data ie;
769 struct rsn_mdie *mdie;
770
771 if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
772 ie.num_pmkid != 1 || ie.pmkid == NULL) {
773 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
774 "FT 4-way handshake message 2/4");
775 return -1;
776 }
777
778 os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
779 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
780 sm->sup_pmk_r1_name, PMKID_LEN);
781
782 if (!kde->mdie || !kde->ftie) {
783 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
784 "message 2/4", kde->mdie ? "FTIE" : "MDIE");
785 return -1;
786 }
787
788 mdie = (struct rsn_mdie *) (kde->mdie + 2);
789 if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
790 os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
791 MOBILITY_DOMAIN_ID_LEN) != 0) {
792 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
793 return -1;
794 }
795
796 if (sm->assoc_resp_ftie &&
797 (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
798 os_memcmp(kde->ftie, sm->assoc_resp_ftie,
799 2 + sm->assoc_resp_ftie[1]) != 0)) {
800 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
801 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
802 kde->ftie, kde->ftie_len);
803 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
804 sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
805 return -1;
806 }
807
808 return 0;
809}
4ec1fd8e 810#endif /* CONFIG_IEEE80211R_AP */
0f857f43
JM		 811
812
c772d054
JM		 813static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
814 struct wpa_state_machine *sm, int group)
ec027805
JM		 815{
816 /* Supplicant reported a Michael MIC error */
817 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
818 "received EAPOL-Key Error Request "
819 "(STA detected Michael MIC failure (group=%d))",
820 group);
fbc72d32
JM		 821
822 if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
823 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
824 "ignore Michael MIC failure report since "
825 "group cipher is not TKIP");
826 } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
827 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
828 "ignore Michael MIC failure report since "
829 "pairwise cipher is not TKIP");
830 } else {
c772d054
JM		 831 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
832 return 1; /* STA entry was removed */
fbc72d32
JM		 833 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
834 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
835 }
ec027805
JM		 836
837 /*
838 * Error report is not a request for a new key handshake, but since
839 * Authenticator may do it, let's change the keys now anyway.
840 */
841 wpa_request_new_ptk(sm);
c772d054 842 return 0;
ec027805
JM		 843}
844
845
f23c5b17
JM		 846static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
847 size_t data_len)
848{
849 struct wpa_ptk PTK;
850 int ok = 0;
851 const u8 *pmk = NULL;
7a12edd1 852 size_t pmk_len;
f23c5b17 853
b729fd8d 854 os_memset(&PTK, 0, sizeof(PTK));
f23c5b17 855 for (;;) {
e61fea6b
JM		 856 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
857 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
f23c5b17 858 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
7a12edd1 859 sm->p2p_dev_addr, pmk, &pmk_len);
f23c5b17
JM		 860 if (pmk == NULL)
861 break;
207976f0 862 } else {
f23c5b17 863 pmk = sm->PMK;
207976f0
JM		 864 pmk_len = sm->pmk_len;
865 }
f23c5b17 866
364c064a
JM		 867 if (wpa_derive_ptk(sm, sm->alt_SNonce, pmk, pmk_len, &PTK) < 0)
868 break;
f23c5b17 869
567da5bb
JM		 870 if (wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
871 data, data_len) == 0) {
f23c5b17
JM		 872 ok = 1;
873 break;
874 }
875
876 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
877 break;
878 }
879
880 if (!ok) {
881 wpa_printf(MSG_DEBUG,
882 "WPA: Earlier SNonce did not result in matching MIC");
883 return -1;
884 }
885
886 wpa_printf(MSG_DEBUG,
887 "WPA: Earlier SNonce resulted in matching MIC");
888 sm->alt_snonce_valid = 0;
889 os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
890 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
891 sm->PTK_valid = TRUE;
892
893 return 0;
894}
895
896
6fc6879b
JM		 897void wpa_receive(struct wpa_authenticator *wpa_auth,
898 struct wpa_state_machine *sm,
899 u8 *data, size_t data_len)
900{
901 struct ieee802_1x_hdr *hdr;
902 struct wpa_eapol_key *key;
903 u16 key_info, key_data_length;
a0bf1b68 904 enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST } msg;
6fc6879b
JM		 905 char *msgtxt;
906 struct wpa_eapol_ie_parse kde;
3b5b7aa8
JM		 907 const u8 *key_data;
908 size_t keyhdrlen, mic_len;
6d014ffc 909 u8 *mic;
6fc6879b
JM		 910
911 if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
912 return;
dc5bad48 913 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL data", data, data_len);
6fc6879b 914
567da5bb 915 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 916 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197 917
dc5bad48
JM		 918 if (data_len < sizeof(*hdr) + keyhdrlen) {
919 wpa_printf(MSG_DEBUG, "WPA: Ignore too short EAPOL-Key frame");
6fc6879b 920 return;
dc5bad48 921 }
6fc6879b
JM		 922
923 hdr = (struct ieee802_1x_hdr *) data;
924 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 925 mic = (u8 *) (key + 1);
6fc6879b 926 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 927 key_data = mic + mic_len + 2;
928 key_data_length = WPA_GET_BE16(mic + mic_len);
0d442aff 929 wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
dc5bad48
JM		 930 " key_info=0x%x type=%u mic_len=%u key_data_length=%u",
931 MAC2STR(sm->addr), key_info, key->type,
932 (unsigned int) mic_len, key_data_length);
933 wpa_hexdump(MSG_MSGDUMP,
934 "WPA: EAPOL-Key header (ending before Key MIC)",
935 key, sizeof(*key));
936 wpa_hexdump(MSG_MSGDUMP, "WPA: EAPOL-Key Key MIC",
937 mic, mic_len);
5e3b5197 938 if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
6fc6879b
JM		 939 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
940 "key_data overflow (%d > %lu)",
941 key_data_length,
942 (unsigned long) (data_len - sizeof(*hdr) -
5e3b5197 943 keyhdrlen));
6fc6879b
JM		 944 return;
945 }
946
f8e96eb6 947 if (sm->wpa == WPA_VERSION_WPA2) {
74590e71
JM		 948 if (key->type == EAPOL_KEY_TYPE_WPA) {
949 /*
950 * Some deployed station implementations seem to send
951 * msg 4/4 with incorrect type value in WPA2 mode.
952 */
953 wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
954 "with unexpected WPA type in RSN mode");
955 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
f8e96eb6
JM		 956 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
957 "unexpected type %d in RSN mode",
958 key->type);
959 return;
960 }
961 } else {
962 if (key->type != EAPOL_KEY_TYPE_WPA) {
963 wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
964 "unexpected type %d in WPA mode",
965 key->type);
966 return;
967 }
968 }
969
bc8318ac
JM		 970 wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
971 WPA_NONCE_LEN);
972 wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
973 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
974
6fc6879b
JM		 975 /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
976 * are set */
977
a0bf1b68
JM		 978 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
979 wpa_printf(MSG_DEBUG, "WPA: Ignore SMK message");
980 return;
981 }
982
983 if (key_info & WPA_KEY_INFO_REQUEST) {
6fc6879b
JM		 984 msg = REQUEST;
985 msgtxt = "Request";
986 } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
987 msg = GROUP_2;
988 msgtxt = "2/2 Group";
3b5b7aa8
JM		 989 } else if (key_data_length == 0 ||
990 (mic_len == 0 && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
991 key_data_length == AES_BLOCK_SIZE)) {
6fc6879b
JM		 992 msg = PAIRWISE_4;
993 msgtxt = "4/4 Pairwise";
994 } else {
995 msg = PAIRWISE_2;
996 msgtxt = "2/4 Pairwise";
997 }
998
6fc6879b
JM		 999 if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
1000 msg == GROUP_2) {
1001 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
eb7719ff
JM		 1002 if (sm->pairwise == WPA_CIPHER_CCMP ||
1003 sm->pairwise == WPA_CIPHER_GCMP) {
6fc6879b 1004 if (wpa_use_aes_cmac(sm) &&
a14896e8 1005 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
929a2ea5 1006 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
b9866483 1007 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
6fc6879b
JM		 1008 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1009 wpa_auth_logger(wpa_auth, sm->addr,
1010 LOGGER_WARNING,
1011 "advertised support for "
1012 "AES-128-CMAC, but did not "
1013 "use it");
1014 return;
1015 }
1016
1017 if (!wpa_use_aes_cmac(sm) &&
9824de57 1018 !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
2449791b 1019 !wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
07a5fe82 1020 sm->wpa_key_mgmt != WPA_KEY_MGMT_OWE &&
567da5bb 1021 sm->wpa_key_mgmt != WPA_KEY_MGMT_DPP &&
6fc6879b
JM		 1022 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1023 wpa_auth_logger(wpa_auth, sm->addr,
1024 LOGGER_WARNING,
1025 "did not use HMAC-SHA1-AES "
eb7719ff 1026 "with CCMP/GCMP");
6fc6879b
JM		 1027 return;
1028 }
1029 }
929a2ea5 1030
2449791b 1031 if ((wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
07a5fe82 1032 wpa_key_mgmt_fils(sm->wpa_key_mgmt) ||
567da5bb 1033 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
07a5fe82 1034 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) &&
929a2ea5
JM		 1035 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
1036 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1037 "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
1038 return;
1039 }
6fc6879b
JM		 1040 }
1041
1042 if (key_info & WPA_KEY_INFO_REQUEST) {
1043 if (sm->req_replay_counter_used &&
1044 os_memcmp(key->replay_counter, sm->req_replay_counter,
1045 WPA_REPLAY_COUNTER_LEN) <= 0) {
1046 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
1047 "received EAPOL-Key request with "
1048 "replayed counter");
1049 return;
1050 }
1051 }
1052
1053 if (!(key_info & WPA_KEY_INFO_REQUEST) &&
68921e24 1054 !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
22a299ee 1055 int i;
68921e24
JM		 1056
1057 if (msg == PAIRWISE_2 &&
1058 wpa_replay_counter_valid(sm->prev_key_replay,
1059 key->replay_counter) &&
1060 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1061 os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1062 {
1063 /*
1064 * Some supplicant implementations (e.g., Windows XP
1065 * WZC) update SNonce for each EAPOL-Key 2/4. This
1066 * breaks the workaround on accepting any of the
1067 * pending requests, so allow the SNonce to be updated
1068 * even if we have already sent out EAPOL-Key 3/4.
1069 */
1070 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1071 "Process SNonce update from STA "
1072 "based on retransmitted EAPOL-Key "
1073 "1/4");
1074 sm->update_snonce = 1;
f23c5b17
JM		 1075 os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1076 sm->alt_snonce_valid = TRUE;
1077 os_memcpy(sm->alt_replay_counter,
1078 sm->key_replay[0].counter,
1079 WPA_REPLAY_COUNTER_LEN);
1080 goto continue_processing;
1081 }
1082
1083 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1084 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1085 os_memcmp(key->replay_counter, sm->alt_replay_counter,
1086 WPA_REPLAY_COUNTER_LEN) == 0) {
1087 /*
1088 * Supplicant may still be using the old SNonce since
1089 * there was two EAPOL-Key 2/4 messages and they had
1090 * different SNonce values.
1091 */
1092 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1093 "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
68921e24
JM		 1094 goto continue_processing;
1095 }
1096
1097 if (msg == PAIRWISE_2 &&
1098 wpa_replay_counter_valid(sm->prev_key_replay,
1099 key->replay_counter) &&
1100 sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1101 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1102 "ignore retransmitted EAPOL-Key %s - "
1103 "SNonce did not change", msgtxt);
1104 } else {
1105 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1106 "received EAPOL-Key %s with "
1107 "unexpected replay counter", msgtxt);
1108 }
22a299ee
JM		 1109 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1110 if (!sm->key_replay[i].valid)
1111 break;
1112 wpa_hexdump(MSG_DEBUG, "pending replay counter",
1113 sm->key_replay[i].counter,
1114 WPA_REPLAY_COUNTER_LEN);
1115 }
6fc6879b
JM		 1116 wpa_hexdump(MSG_DEBUG, "received replay counter",
1117 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1118 return;
1119 }
1120
68921e24 1121continue_processing:
3b5b7aa8
JM		 1122#ifdef CONFIG_FILS
1123 if (sm->wpa == WPA_VERSION_WPA2 && mic_len == 0 &&
1124 !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1125 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1126 "WPA: Encr Key Data bit not set even though AEAD cipher is supposed to be used - drop frame");
1127 return;
1128 }
1129#endif /* CONFIG_FILS */
1130
6fc6879b
JM		 1131 switch (msg) {
1132 case PAIRWISE_2:
1133 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
68921e24
JM		 1134 sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1135 (!sm->update_snonce ||
1136 sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
6fc6879b
JM		 1137 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1138 "received EAPOL-Key msg 2/4 in "
1139 "invalid state (%d) - dropped",
1140 sm->wpa_ptk_state);
1141 return;
1142 }
bbb921da 1143 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
08704cd8
JM		 1144 if (sm->group->reject_4way_hs_for_entropy) {
1145 /*
1146 * The system did not have enough entropy to generate
1147 * strong random numbers. Reject the first 4-way
1148 * handshake(s) and collect some entropy based on the
1149 * information from it. Once enough entropy is
1150 * available, the next atempt will trigger GMK/Key
1151 * Counter update and the station will be allowed to
1152 * continue.
1153 */
1154 wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1155 "collect more entropy for random number "
1156 "generation");
08704cd8 1157 random_mark_pool_ready();
567da5bb
JM		 1158 wpa_sta_disconnect(wpa_auth, sm->addr,
1159 WLAN_REASON_PREV_AUTH_NOT_VALID);
08704cd8
JM		 1160 return;
1161 }
6fc6879b
JM		 1162 break;
1163 case PAIRWISE_4:
1164 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1165 !sm->PTK_valid) {
1166 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1167 "received EAPOL-Key msg 4/4 in "
1168 "invalid state (%d) - dropped",
1169 sm->wpa_ptk_state);
1170 return;
1171 }
1172 break;
1173 case GROUP_2:
1174 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1175 || !sm->PTK_valid) {
1176 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1177 "received EAPOL-Key msg 2/2 in "
1178 "invalid state (%d) - dropped",
1179 sm->wpa_ptk_group_state);
1180 return;
1181 }
1182 break;
6fc6879b
JM		 1183 case REQUEST:
1184 break;
1185 }
1186
1187 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1188 "received EAPOL-Key frame (%s)", msgtxt);
1189
1190 if (key_info & WPA_KEY_INFO_ACK) {
1191 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1192 "received invalid EAPOL-Key: Key Ack set");
1193 return;
1194 }
1195
b9866483
JM		 1196 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1197 !(key_info & WPA_KEY_INFO_MIC)) {
6fc6879b
JM		 1198 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1199 "received invalid EAPOL-Key: Key MIC not set");
1200 return;
1201 }
1202
b9866483
JM		 1203#ifdef CONFIG_FILS
1204 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1205 (key_info & WPA_KEY_INFO_MIC)) {
1206 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1207 "received invalid EAPOL-Key: Key MIC set");
1208 return;
1209 }
1210#endif /* CONFIG_FILS */
1211
6fc6879b 1212 sm->MICVerified = FALSE;
68921e24 1213 if (sm->PTK_valid && !sm->update_snonce) {
3b5b7aa8 1214 if (mic_len &&
567da5bb
JM		 1215 wpa_verify_key_mic(sm->wpa_key_mgmt, sm->pmk_len, &sm->PTK,
1216 data, data_len) &&
f23c5b17
JM		 1217 (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1218 wpa_try_alt_snonce(sm, data, data_len))) {
6fc6879b
JM		 1219 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1220 "received EAPOL-Key with invalid MIC");
1221 return;
1222 }
75c8563e
JM		 1223#ifdef CONFIG_FILS
1224 if (!mic_len &&
1225 wpa_aead_decrypt(sm, &sm->PTK, data, data_len,
1226 &key_data_length) < 0) {
1227 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1228 "received EAPOL-Key with invalid MIC");
1229 return;
1230 }
1231#endif /* CONFIG_FILS */
6fc6879b
JM		 1232 sm->MICVerified = TRUE;
1233 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
e4bf4db9 1234 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1235 }
1236
1237 if (key_info & WPA_KEY_INFO_REQUEST) {
1238 if (sm->MICVerified) {
1239 sm->req_replay_counter_used = 1;
1240 os_memcpy(sm->req_replay_counter, key->replay_counter,
1241 WPA_REPLAY_COUNTER_LEN);
1242 } else {
1243 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1244 "received EAPOL-Key request with "
1245 "invalid MIC");
1246 return;
1247 }
1248
1249 /*
1250 * TODO: should decrypt key data field if encryption was used;
1251 * even though MAC address KDE is not normally encrypted,
1252 * supplicant is allowed to encrypt it.
1253 */
a0bf1b68 1254 if (key_info & WPA_KEY_INFO_ERROR) {
c772d054
JM		 1255 if (wpa_receive_error_report(
1256 wpa_auth, sm,
1257 !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1258 return; /* STA entry was removed */
6fc6879b
JM		 1259 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1260 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1261 "received EAPOL-Key Request for new "
1262 "4-Way Handshake");
1263 wpa_request_new_ptk(sm);
6fc6879b 1264 } else if (key_data_length > 0 &&
5e3b5197
JM		 1265 wpa_parse_kde_ies(key_data, key_data_length,
1266 &kde) == 0 &&
6fc6879b
JM		 1267 kde.mac_addr) {
1268 } else {
1269 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1270 "received EAPOL-Key Request for GTK "
1271 "rekeying");
6fc6879b
JM		 1272 eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1273 wpa_rekey_gtk(wpa_auth, NULL);
1274 }
1275 } else {
68921e24
JM		 1276 /* Do not allow the same key replay counter to be reused. */
1277 wpa_replay_counter_mark_invalid(sm->key_replay,
1278 key->replay_counter);
1279
1280 if (msg == PAIRWISE_2) {
1281 /*
1282 * Maintain a copy of the pending EAPOL-Key frames in
1283 * case the EAPOL-Key frame was retransmitted. This is
1284 * needed to allow EAPOL-Key msg 2/4 reply to another
1285 * pending msg 1/4 to update the SNonce to work around
1286 * unexpected supplicant behavior.
1287 */
1288 os_memcpy(sm->prev_key_replay, sm->key_replay,
1289 sizeof(sm->key_replay));
1290 } else {
1291 os_memset(sm->prev_key_replay, 0,
1292 sizeof(sm->prev_key_replay));
1293 }
1294
1295 /*
1296 * Make sure old valid counters are not accepted anymore and
1297 * do not get copied again.
1298 */
1299 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
6fc6879b
JM		 1300 }
1301
6fc6879b 1302 os_free(sm->last_rx_eapol_key);
a1f11e34 1303 sm->last_rx_eapol_key = os_memdup(data, data_len);
6fc6879b
JM		 1304 if (sm->last_rx_eapol_key == NULL)
1305 return;
6fc6879b
JM		 1306 sm->last_rx_eapol_key_len = data_len;
1307
0d442aff 1308 sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
6fc6879b
JM		 1309 sm->EAPOLKeyReceived = TRUE;
1310 sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1311 sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1312 os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1313 wpa_sm_step(sm);
1314}
1315
1316
3c7302c2
JM		 1317static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1318 const u8 *gnonce, u8 *gtk, size_t gtk_len)
6fc6879b 1319{
5cb9d5c3
JM		 1320 u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1321 u8 *pos;
3c7302c2 1322 int ret = 0;
6fc6879b 1323
5cb9d5c3
JM		 1324 /* GTK = PRF-X(GMK, "Group key expansion",
1325 * AA || GNonce || Time || random data)
1326 * The example described in the IEEE 802.11 standard uses only AA and
1327 * GNonce as inputs here. Add some more entropy since this derivation
1328 * is done only at the Authenticator and as such, does not need to be
1329 * exactly same.
1330 */
6fc6879b
JM		 1331 os_memcpy(data, addr, ETH_ALEN);
1332 os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
5cb9d5c3
JM		 1333 pos = data + ETH_ALEN + WPA_NONCE_LEN;
1334 wpa_get_ntp_timestamp(pos);
1335 pos += 8;
3642c431 1336 if (random_get_bytes(pos, 16) < 0)
3c7302c2 1337 ret = -1;
6fc6879b 1338
56586197 1339#ifdef CONFIG_IEEE80211W
5cb9d5c3 1340 sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
56586197 1341#else /* CONFIG_IEEE80211W */
3c7302c2
JM		 1342 if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1343 < 0)
1344 ret = -1;
56586197 1345#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 1346
1347 return ret;
6fc6879b
JM		 1348}
1349
1350
1351static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1352{
1353 struct wpa_authenticator *wpa_auth = eloop_ctx;
1354 struct wpa_state_machine *sm = timeout_ctx;
1355
e4bf4db9 1356 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 1357 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1358 sm->TimeoutEvt = TRUE;
1359 wpa_sm_step(sm);
1360}
1361
1362
1363void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1364 struct wpa_state_machine *sm, int key_info,
1365 const u8 *key_rsc, const u8 *nonce,
1366 const u8 *kde, size_t kde_len,
1367 int keyidx, int encr, int force_version)
1368{
1369 struct ieee802_1x_hdr *hdr;
1370 struct wpa_eapol_key *key;
5e3b5197 1371 size_t len, mic_len, keyhdrlen;
6fc6879b
JM		 1372 int alg;
1373 int key_data_len, pad_len = 0;
1374 u8 *buf, *pos;
1375 int version, pairwise;
22a299ee 1376 int i;
6d014ffc 1377 u8 *key_mic, *key_data;
6fc6879b 1378
567da5bb 1379 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
6d014ffc 1380 keyhdrlen = sizeof(*key) + mic_len + 2;
5e3b5197
JM		 1381
1382 len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
6fc6879b
JM		 1383
1384 if (force_version)
1385 version = force_version;
929a2ea5 1386 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
07a5fe82 1387 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
567da5bb 1388 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
36a50fd4
JM		 1389 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1390 wpa_key_mgmt_fils(sm->wpa_key_mgmt))
a14896e8 1391 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
6fc6879b
JM		 1392 else if (wpa_use_aes_cmac(sm))
1393 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
eb7719ff 1394 else if (sm->pairwise != WPA_CIPHER_TKIP)
6fc6879b
JM		 1395 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1396 else
1397 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1398
8543ed8a 1399 pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
6fc6879b
JM		 1400
1401 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1402 "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1403 "encr=%d)",
1404 version,
1405 (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1406 (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1407 (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1408 (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1409 pairwise, (unsigned long) kde_len, keyidx, encr);
1410
1411 key_data_len = kde_len;
1412
1413 if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
07a5fe82 1414 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
567da5bb 1415 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a14896e8 1416 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1417 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b
JM		 1418 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1419 pad_len = key_data_len % 8;
1420 if (pad_len)
1421 pad_len = 8 - pad_len;
1422 key_data_len += pad_len + 8;
1423 }
1424
1425 len += key_data_len;
b729fd8d
JM		 1426 if (!mic_len && encr)
1427 len += AES_BLOCK_SIZE;
6fc6879b
JM		 1428
1429 hdr = os_zalloc(len);
1430 if (hdr == NULL)
1431 return;
1432 hdr->version = wpa_auth->conf.eapol_version;
1433 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1434 hdr->length = host_to_be16(len - sizeof(*hdr));
1435 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1436 key_mic = (u8 *) (key + 1);
5e3b5197 1437 key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
6fc6879b
JM		 1438
1439 key->type = sm->wpa == WPA_VERSION_WPA2 ?
1440 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1441 key_info |= version;
1442 if (encr && sm->wpa == WPA_VERSION_WPA2)
1443 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1444 if (sm->wpa != WPA_VERSION_WPA2)
1445 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1446 WPA_PUT_BE16(key->key_info, key_info);
1447
1448 alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
a0bf1b68 1449 if (sm->wpa == WPA_VERSION_WPA2 && !pairwise)
6fc6879b 1450 WPA_PUT_BE16(key->key_length, 0);
caab23f1
JM		 1451 else
1452 WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
6fc6879b 1453
22a299ee
JM		 1454 for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1455 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1456 os_memcpy(sm->key_replay[i].counter,
1457 sm->key_replay[i - 1].counter,
1458 WPA_REPLAY_COUNTER_LEN);
1459 }
1460 inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1461 os_memcpy(key->replay_counter, sm->key_replay[0].counter,
6fc6879b 1462 WPA_REPLAY_COUNTER_LEN);
db099951
JM		 1463 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1464 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
22a299ee 1465 sm->key_replay[0].valid = TRUE;
6fc6879b
JM		 1466
1467 if (nonce)
1468 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1469
1470 if (key_rsc)
1471 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1472
1473 if (kde && !encr) {
5e3b5197 1474 os_memcpy(key_data, kde, kde_len);
6d014ffc 1475 WPA_PUT_BE16(key_mic + mic_len, kde_len);
b729fd8d
JM		 1476#ifdef CONFIG_FILS
1477 } else if (!mic_len) {
1478 const u8 *aad[1];
1479 size_t aad_len[1];
1480
1481 WPA_PUT_BE16(key_mic, AES_BLOCK_SIZE + kde_len);
1482 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1483 kde, kde_len);
1484
1485 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK",
1486 sm->PTK.kek, sm->PTK.kek_len);
1487 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
1488 * to Key Data (exclusive). */
1489 aad[0] = (u8 *) hdr;
1490 aad_len[0] = key_mic + 2 - (u8 *) hdr;
1491 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len, kde, kde_len,
1492 1, aad, aad_len, key_mic + 2) < 0) {
1493 wpa_printf(MSG_DEBUG, "WPA: AES-SIV encryption failed");
1494 return;
1495 }
1496
1497 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV",
1498 key_mic + 2, AES_BLOCK_SIZE + kde_len);
1499#endif /* CONFIG_FILS */
6fc6879b
JM		 1500 } else if (encr && kde) {
1501 buf = os_zalloc(key_data_len);
1502 if (buf == NULL) {
1503 os_free(hdr);
1504 return;
1505 }
1506 pos = buf;
1507 os_memcpy(pos, kde, kde_len);
1508 pos += kde_len;
1509
1510 if (pad_len)
1511 *pos++ = 0xdd;
1512
1513 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1514 buf, key_data_len);
1515 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
07a5fe82 1516 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE ||
567da5bb 1517 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a14896e8 1518 sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
929a2ea5 1519 wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
6fc6879b 1520 version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
ef9627cb
JM		 1521 wpa_printf(MSG_DEBUG,
1522 "WPA: Encrypt Key Data using AES-WRAP (KEK length %u)",
1523 (unsigned int) sm->PTK.kek_len);
98cd3d1c 1524 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
5e3b5197 1525 (key_data_len - 8) / 8, buf, key_data)) {
6fc6879b
JM		 1526 os_free(hdr);
1527 os_free(buf);
1528 return;
1529 }
6d014ffc 1530 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1531#ifndef CONFIG_NO_RC4
98cd3d1c 1532 } else if (sm->PTK.kek_len == 16) {
6fc6879b 1533 u8 ek[32];
ef9627cb
JM		 1534
1535 wpa_printf(MSG_DEBUG,
1536 "WPA: Encrypt Key Data using RC4");
6fc6879b
JM		 1537 os_memcpy(key->key_iv,
1538 sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1539 inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1540 os_memcpy(ek, key->key_iv, 16);
98cd3d1c 1541 os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
5e3b5197
JM		 1542 os_memcpy(key_data, buf, key_data_len);
1543 rc4_skip(ek, 32, 256, key_data, key_data_len);
6d014ffc 1544 WPA_PUT_BE16(key_mic + mic_len, key_data_len);
7cb53ded 1545#endif /* CONFIG_NO_RC4 */
98cd3d1c
JM		 1546 } else {
1547 os_free(hdr);
1548 os_free(buf);
1549 return;
6fc6879b
JM		 1550 }
1551 os_free(buf);
1552 }
1553
1554 if (key_info & WPA_KEY_INFO_MIC) {
b729fd8d 1555 if (!sm->PTK_valid || !mic_len) {
6fc6879b
JM		 1556 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1557 "PTK not valid when sending EAPOL-Key "
1558 "frame");
1559 os_free(hdr);
1560 return;
1561 }
5e3b5197 1562
98cd3d1c
JM		 1563 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1564 sm->wpa_key_mgmt, version,
5e3b5197 1565 (u8 *) hdr, len, key_mic);
7af092a0
JB		 1566#ifdef CONFIG_TESTING_OPTIONS
1567 if (!pairwise &&
06df2aa6 1568 wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
7af092a0
JB		 1569 drand48() <
1570 wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1571 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1572 "Corrupting group EAPOL-Key Key MIC");
5e3b5197 1573 key_mic[0]++;
7af092a0
JB		 1574 }
1575#endif /* CONFIG_TESTING_OPTIONS */
6fc6879b
JM		 1576 }
1577
1578 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1579 1);
1580 wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1581 sm->pairwise_set);
1582 os_free(hdr);
1583}
1584
1585
1586static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1587 struct wpa_state_machine *sm, int key_info,
1588 const u8 *key_rsc, const u8 *nonce,
1589 const u8 *kde, size_t kde_len,
1590 int keyidx, int encr)
1591{
1592 int timeout_ms;
1593 int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
41f140d3 1594 u32 ctr;
6fc6879b
JM		 1595
1596 if (sm == NULL)
1597 return;
1598
1599 __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1600 keyidx, encr, 0);
1601
bae61562 1602 ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
e4bf4db9 1603 if (ctr == 1 && wpa_auth->conf.tx_status)
00338a4f
JM		 1604 timeout_ms = pairwise ? eapol_key_timeout_first :
1605 eapol_key_timeout_first_group;
bae61562
JM		 1606 else
1607 timeout_ms = eapol_key_timeout_subseq;
6f234c1e
JM		 1608 if (wpa_auth->conf.wpa_disable_eapol_key_retries &&
1609 (!pairwise || (key_info & WPA_KEY_INFO_MIC)))
1610 timeout_ms = eapol_key_timeout_no_retrans;
e4bf4db9
JM		 1611 if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1612 sm->pending_1_of_4_timeout = 1;
1613 wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
41f140d3 1614 "counter %u)", timeout_ms, ctr);
6fc6879b
JM		 1615 eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1616 wpa_send_eapol_timeout, wpa_auth, sm);
1617}
1618
1619
567da5bb
JM		 1620static int wpa_verify_key_mic(int akmp, size_t pmk_len, struct wpa_ptk *PTK,
1621 u8 *data, size_t data_len)
6fc6879b
JM		 1622{
1623 struct ieee802_1x_hdr *hdr;
1624 struct wpa_eapol_key *key;
1625 u16 key_info;
1626 int ret = 0;
6d014ffc 1627 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN], *mic_pos;
567da5bb 1628 size_t mic_len = wpa_mic_len(akmp, pmk_len);
6fc6879b
JM		 1629
1630 if (data_len < sizeof(*hdr) + sizeof(*key))
1631 return -1;
1632
1633 hdr = (struct ieee802_1x_hdr *) data;
1634 key = (struct wpa_eapol_key *) (hdr + 1);
6d014ffc 1635 mic_pos = (u8 *) (key + 1);
6fc6879b 1636 key_info = WPA_GET_BE16(key->key_info);
6d014ffc
JM		 1637 os_memcpy(mic, mic_pos, mic_len);
1638 os_memset(mic_pos, 0, mic_len);
98cd3d1c
JM		 1639 if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1640 key_info & WPA_KEY_INFO_TYPE_MASK,
6d014ffc
JM		 1641 data, data_len, mic_pos) ||
1642 os_memcmp_const(mic, mic_pos, mic_len) != 0)
6fc6879b 1643 ret = -1;
6d014ffc 1644 os_memcpy(mic_pos, mic, mic_len);
6fc6879b
JM		 1645 return ret;
1646}
1647
1648
1649void wpa_remove_ptk(struct wpa_state_machine *sm)
1650{
1651 sm->PTK_valid = FALSE;
1652 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
2a0b86d3
JM		 1653 if (wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL,
1654 0))
1655 wpa_printf(MSG_DEBUG,
1656 "RSN: PTK removal from the driver failed");
6fc6879b 1657 sm->pairwise_set = FALSE;
581a8cde 1658 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
6fc6879b
JM		 1659}
1660
1661
bb119228 1662int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
6fc6879b 1663{
5d22a1d5
JM		 1664 int remove_ptk = 1;
1665
6fc6879b 1666 if (sm == NULL)
6f9b5d16 1667 return -1;
6fc6879b
JM		 1668
1669 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1670 "event %d notification", event);
1671
1672 switch (event) {
1673 case WPA_AUTH:
c50d94f1
BC		 1674#ifdef CONFIG_MESH
1675 /* PTKs are derived through AMPE */
1676 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1677 /* not mesh */
1678 break;
1679 }
1680 return 0;
1681#endif /* CONFIG_MESH */
6fc6879b
JM		 1682 case WPA_ASSOC:
1683 break;
1684 case WPA_DEAUTH:
1685 case WPA_DISASSOC:
1686 sm->DeauthenticationRequest = TRUE;
1687 break;
1688 case WPA_REAUTH:
1689 case WPA_REAUTH_EAPOL:
3ab72b62
JM		 1690 if (!sm->started) {
1691 /*
1692 * When using WPS, we may end up here if the STA
1693 * manages to re-associate without the previous STA
1694 * entry getting removed. Consequently, we need to make
1695 * sure that the WPA state machines gets initialized
1696 * properly at this point.
1697 */
1698 wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1699 "started - initialize now");
1700 sm->started = 1;
1701 sm->Init = TRUE;
1702 if (wpa_sm_step(sm) == 1)
1703 return 1; /* should not really happen */
1704 sm->Init = FALSE;
1705 sm->AuthenticationRequest = TRUE;
1706 break;
1707 }
9663596f
JM		 1708 if (sm->GUpdateStationKeys) {
1709 /*
1710 * Reauthentication cancels the pending group key
1711 * update for this STA.
1712 */
1713 sm->group->GKeyDoneStations--;
1714 sm->GUpdateStationKeys = FALSE;
1715 sm->PtkGroupInit = TRUE;
1716 }
6fc6879b
JM		 1717 sm->ReAuthenticationRequest = TRUE;
1718 break;
1719 case WPA_ASSOC_FT:
4ec1fd8e 1720#ifdef CONFIG_IEEE80211R_AP
81a658d7
JM		 1721 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1722 "after association");
1723 wpa_ft_install_ptk(sm);
1724
6fc6879b
JM		 1725 /* Using FT protocol, not WPA auth state machine */
1726 sm->ft_completed = 1;
6f9b5d16 1727 return 0;
4ec1fd8e 1728#else /* CONFIG_IEEE80211R_AP */
6fc6879b 1729 break;
4ec1fd8e 1730#endif /* CONFIG_IEEE80211R_AP */
957bff83
JM		 1731 case WPA_ASSOC_FILS:
1732#ifdef CONFIG_FILS
1733 wpa_printf(MSG_DEBUG,
1734 "FILS: TK configuration after association");
1735 fils_set_tk(sm);
1736 sm->fils_completed = 1;
1737 return 0;
1738#else /* CONFIG_FILS */
1739 break;
1740#endif /* CONFIG_FILS */
0e3bd7ac
MV		 1741 case WPA_DRV_STA_REMOVED:
1742 sm->tk_already_set = FALSE;
1743 return 0;
6fc6879b
JM		 1744 }
1745
4ec1fd8e 1746#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1747 sm->ft_completed = 0;
4ec1fd8e 1748#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1749
5d22a1d5
JM		 1750#ifdef CONFIG_IEEE80211W
1751 if (sm->mgmt_frame_prot && event == WPA_AUTH)
1752 remove_ptk = 0;
1753#endif /* CONFIG_IEEE80211W */
78815f3d 1754#ifdef CONFIG_FILS
da24c5aa
JM		 1755 if (wpa_key_mgmt_fils(sm->wpa_key_mgmt) &&
1756 (event == WPA_AUTH || event == WPA_ASSOC))
78815f3d
JM		 1757 remove_ptk = 0;
1758#endif /* CONFIG_FILS */
6fc6879b 1759
5d22a1d5
JM		 1760 if (remove_ptk) {
1761 sm->PTK_valid = FALSE;
1762 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1763
1764 if (event != WPA_REAUTH_EAPOL)
1765 wpa_remove_ptk(sm);
1766 }
6fc6879b 1767
43f49c37
JM		 1768 if (sm->in_step_loop) {
1769 /*
1770 * wpa_sm_step() is already running - avoid recursive call to
1771 * it by making the existing loop process the new update.
1772 */
1773 sm->changed = TRUE;
1774 return 0;
1775 }
6f9b5d16 1776 return wpa_sm_step(sm);
6fc6879b
JM		 1777}
1778
1779
6fc6879b
JM		 1780SM_STATE(WPA_PTK, INITIALIZE)
1781{
1782 SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1783 if (sm->Init) {
1784 /* Init flag is not cleared here, so avoid busy
1785 * loop by claiming nothing changed. */
1786 sm->changed = FALSE;
1787 }
1788
1789 sm->keycount = 0;
1790 if (sm->GUpdateStationKeys)
1791 sm->group->GKeyDoneStations--;
1792 sm->GUpdateStationKeys = FALSE;
1793 if (sm->wpa == WPA_VERSION_WPA)
1794 sm->PInitAKeys = FALSE;
1795 if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1796 * Local AA > Remote AA)) */) {
1797 sm->Pair = TRUE;
1798 }
1799 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1800 wpa_remove_ptk(sm);
1801 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1802 sm->TimeoutCtr = 0;
a1ea1b45 1803 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 1804 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 1805 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 1806 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1807 WPA_EAPOL_authorized, 0);
1808 }
1809}
1810
1811
1812SM_STATE(WPA_PTK, DISCONNECT)
1813{
567da5bb
JM		 1814 u16 reason = sm->disconnect_reason;
1815
6fc6879b
JM		 1816 SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1817 sm->Disconnect = FALSE;
567da5bb
JM		 1818 sm->disconnect_reason = 0;
1819 if (!reason)
1820 reason = WLAN_REASON_PREV_AUTH_NOT_VALID;
1821 wpa_sta_disconnect(sm->wpa_auth, sm->addr, reason);
6fc6879b
JM		 1822}
1823
1824
1825SM_STATE(WPA_PTK, DISCONNECTED)
1826{
1827 SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1828 sm->DeauthenticationRequest = FALSE;
1829}
1830
1831
1832SM_STATE(WPA_PTK, AUTHENTICATION)
1833{
1834 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1835 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1836 sm->PTK_valid = FALSE;
1837 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1838 1);
1839 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1840 sm->AuthenticationRequest = FALSE;
1841}
1842
1843
40d00d2b
NC		 1844static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1845 struct wpa_group *group)
1bdb7ab3 1846{
40d00d2b
NC		 1847 if (group->first_sta_seen)
1848 return;
1bdb7ab3
JM		 1849 /*
1850 * System has run bit further than at the time hostapd was started
1851 * potentially very early during boot up. This provides better chances
1852 * of collecting more randomness on embedded systems. Re-initialize the
1853 * GMK and Counter here to improve their strength if there was not
1854 * enough entropy available immediately after system startup.
1855 */
1856 wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1857 "station");
08704cd8
JM		 1858 if (random_pool_ready() != 1) {
1859 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1860 "to proceed - reject first 4-way handshake");
1861 group->reject_4way_hs_for_entropy = TRUE;
40d00d2b
NC		 1862 } else {
1863 group->first_sta_seen = TRUE;
1864 group->reject_4way_hs_for_entropy = FALSE;
08704cd8 1865 }
40d00d2b 1866
aac1efec
JM		 1867 if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0 ||
1868 wpa_gtk_update(wpa_auth, group) < 0 ||
1869 wpa_group_config_group_keys(wpa_auth, group) < 0) {
1870 wpa_printf(MSG_INFO, "WPA: GMK/GTK setup failed");
1871 group->first_sta_seen = FALSE;
1872 group->reject_4way_hs_for_entropy = TRUE;
1873 }
1bdb7ab3
JM		 1874}
1875
1876
6fc6879b
JM		 1877SM_STATE(WPA_PTK, AUTHENTICATION2)
1878{
1879 SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1bdb7ab3 1880
40d00d2b 1881 wpa_group_ensure_init(sm->wpa_auth, sm->group);
65a32cdb 1882 sm->ReAuthenticationRequest = FALSE;
1bdb7ab3 1883
3825a19b
JM		 1884 /*
1885 * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1886 * ambiguous. The Authenticator state machine uses a counter that is
1887 * incremented by one for each 4-way handshake. However, the security
1888 * analysis of 4-way handshake points out that unpredictable nonces
1889 * help in preventing precomputation attacks. Instead of the state
1890 * machine definition, use an unpredictable nonce value here to provide
1891 * stronger protection against potential precomputation attacks.
1892 */
1893 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1894 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1895 "ANonce.");
65a32cdb 1896 sm->Disconnect = TRUE;
3825a19b
JM		 1897 return;
1898 }
bc8318ac
JM		 1899 wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1900 WPA_NONCE_LEN);
6fc6879b
JM		 1901 /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1902 * logical place than INITIALIZE since AUTHENTICATION2 can be
1903 * re-entered on ReAuthenticationRequest without going through
1904 * INITIALIZE. */
1905 sm->TimeoutCtr = 0;
1906}
1907
1908
0adc9b28
JM		 1909static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
1910{
1911 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1912 wpa_printf(MSG_ERROR,
1913 "WPA: Failed to get random data for ANonce");
1914 sm->Disconnect = TRUE;
1915 return -1;
1916 }
1917 wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
1918 WPA_NONCE_LEN);
1919 sm->TimeoutCtr = 0;
1920 return 0;
1921}
1922
1923
6fc6879b
JM		 1924SM_STATE(WPA_PTK, INITPMK)
1925{
1926 u8 msk[2 * PMK_LEN];
1927 size_t len = 2 * PMK_LEN;
1928
1929 SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
4ec1fd8e 1930#ifdef CONFIG_IEEE80211R_AP
6fc6879b 1931 sm->xxkey_len = 0;
4ec1fd8e 1932#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 1933 if (sm->pmksa) {
1934 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
207976f0
JM		 1935 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
1936 sm->pmk_len = sm->pmksa->pmk_len;
567da5bb
JM		 1937#ifdef CONFIG_DPP
1938 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP) {
1939 wpa_printf(MSG_DEBUG,
1940 "DPP: No PMKSA cache entry for STA - reject connection");
1941 sm->Disconnect = TRUE;
1942 sm->disconnect_reason = WLAN_REASON_INVALID_PMKID;
1943 return;
1944#endif /* CONFIG_DPP */
6fc6879b 1945 } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
207976f0
JM		 1946 unsigned int pmk_len;
1947
834c5d68 1948 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt))
207976f0
JM		 1949 pmk_len = PMK_LEN_SUITE_B_192;
1950 else
1951 pmk_len = PMK_LEN;
6fc6879b 1952 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
207976f0
JM		 1953 "(MSK len=%lu PMK len=%u)", (unsigned long) len,
1954 pmk_len);
1955 if (len < pmk_len) {
1956 wpa_printf(MSG_DEBUG,
1957 "WPA: MSK not long enough (%u) to create PMK (%u)",
1958 (unsigned int) len, (unsigned int) pmk_len);
1959 sm->Disconnect = TRUE;
1960 return;
1961 }
1962 os_memcpy(sm->PMK, msk, pmk_len);
1963 sm->pmk_len = pmk_len;
4ec1fd8e 1964#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 1965 if (len >= 2 * PMK_LEN) {
1966 os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1967 sm->xxkey_len = PMK_LEN;
1968 }
4ec1fd8e 1969#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 1970 } else {
400de9b1 1971 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
cef8fac0 1972 sm->wpa_auth->cb->get_msk);
1180dd66
JM		 1973 sm->Disconnect = TRUE;
1974 return;
6fc6879b 1975 }
40aaa64f 1976 os_memset(msk, 0, sizeof(msk));
6fc6879b
JM		 1977
1978 sm->req_replay_counter_used = 0;
1979 /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1980 * will break reauthentication since EAPOL state machines may not be
1981 * get into AUTHENTICATING state that clears keyRun before WPA state
1982 * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1983 * state and takes PMK from the previously used AAA Key. This will
1984 * eventually fail in 4-Way Handshake because Supplicant uses PMK
1985 * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1986 * be good workaround for this issue. */
1987 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1988}
1989
1990
1991SM_STATE(WPA_PTK, INITPSK)
1992{
1993 const u8 *psk;
7a12edd1
JM		 1994 size_t psk_len;
1995
6fc6879b 1996 SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
7a12edd1
JM		 1997 psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL,
1998 &psk_len);
6fc6879b 1999 if (psk) {
7a12edd1
JM		 2000 os_memcpy(sm->PMK, psk, psk_len);
2001 sm->pmk_len = psk_len;
4ec1fd8e 2002#ifdef CONFIG_IEEE80211R_AP
6fc6879b
JM		 2003 os_memcpy(sm->xxkey, psk, PMK_LEN);
2004 sm->xxkey_len = PMK_LEN;
4ec1fd8e 2005#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2006 }
e61fea6b
JM		 2007#ifdef CONFIG_SAE
2008 if (wpa_auth_uses_sae(sm) && sm->pmksa) {
2009 wpa_printf(MSG_DEBUG, "SAE: PMK from PMKSA cache");
2010 os_memcpy(sm->PMK, sm->pmksa->pmk, sm->pmksa->pmk_len);
2011 sm->pmk_len = sm->pmksa->pmk_len;
2012 }
2013#endif /* CONFIG_SAE */
6fc6879b
JM		 2014 sm->req_replay_counter_used = 0;
2015}
2016
2017
2018SM_STATE(WPA_PTK, PTKSTART)
2019{
2020 u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
2021 size_t pmkid_len = 0;
2022
2023 SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
2024 sm->PTKRequest = FALSE;
2025 sm->TimeoutEvt = FALSE;
f23c5b17 2026 sm->alt_snonce_valid = FALSE;
bae61562
JM		 2027
2028 sm->TimeoutCtr++;
41f140d3 2029 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2030 /* No point in sending the EAPOL-Key - we will disconnect
2031 * immediately following this. */
2032 return;
2033 }
2034
6fc6879b
JM		 2035 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2036 "sending 1/4 msg of 4-Way Handshake");
2037 /*
2038 * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
2039 * one possible PSK for this STA.
2040 */
2041 if (sm->wpa == WPA_VERSION_WPA2 &&
e61fea6b 2042 (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) ||
d90f10fa 2043 (sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE && sm->pmksa) ||
e61fea6b 2044 wpa_key_mgmt_sae(sm->wpa_key_mgmt)) &&
a14896e8 2045 sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
6fc6879b
JM		 2046 pmkid = buf;
2047 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
2048 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
2049 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
2050 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
929a2ea5 2051 if (sm->pmksa) {
6fc6879b
JM		 2052 os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
2053 sm->pmksa->pmkid, PMKID_LEN);
929a2ea5
JM		 2054 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
2055 /* No KCK available to derive PMKID */
2056 pmkid = NULL;
2057 } else {
6fc6879b
JM		 2058 /*
2059 * Calculate PMKID since no PMKSA cache entry was
2060 * available with pre-calculated PMKID.
2061 */
207976f0 2062 rsn_pmkid(sm->PMK, sm->pmk_len, sm->wpa_auth->addr,
56586197 2063 sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
41b81914 2064 sm->wpa_key_mgmt);
6fc6879b
JM		 2065 }
2066 }
2067 wpa_send_eapol(sm->wpa_auth, sm,
2068 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
2069 sm->ANonce, pmkid, pmkid_len, 0, 0);
6fc6879b
JM		 2070}
2071
2072
f23c5b17 2073static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
207976f0
JM		 2074 const u8 *pmk, unsigned int pmk_len,
2075 struct wpa_ptk *ptk)
6fc6879b 2076{
4ec1fd8e 2077#ifdef CONFIG_IEEE80211R_AP
56586197 2078 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
98cd3d1c 2079 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
4ec1fd8e 2080#endif /* CONFIG_IEEE80211R_AP */
6fc6879b 2081
207976f0 2082 return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
98cd3d1c
JM		 2083 sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
2084 ptk, sm->wpa_key_mgmt, sm->pairwise);
6fc6879b
JM		 2085}
2086
2087
3b5b7aa8 2088#ifdef CONFIG_FILS
c4fd6d8a
JM		 2089
2090int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
80ddf5d9 2091 size_t pmk_len, const u8 *snonce, const u8 *anonce,
4cada9dc 2092 const u8 *dhss, size_t dhss_len,
80ddf5d9 2093 struct wpabuf *g_sta, struct wpabuf *g_ap)
c4fd6d8a
JM		 2094{
2095 u8 ick[FILS_ICK_MAX_LEN];
2096 size_t ick_len;
2097 int res;
8fed47e0
JM		 2098 u8 fils_ft[FILS_FT_MAX_LEN];
2099 size_t fils_ft_len = 0;
c4fd6d8a
JM		 2100
2101 res = fils_pmk_to_ptk(pmk, pmk_len, sm->addr, sm->wpa_auth->addr,
4cada9dc
JM		 2102 snonce, anonce, dhss, dhss_len,
2103 &sm->PTK, ick, &ick_len,
8fed47e0
JM		 2104 sm->wpa_key_mgmt, sm->pairwise,
2105 fils_ft, &fils_ft_len);
c4fd6d8a
JM		 2106 if (res < 0)
2107 return res;
2108 sm->PTK_valid = TRUE;
2f1357fb 2109 sm->tk_already_set = FALSE;
c4fd6d8a 2110
8fed47e0
JM		 2111#ifdef CONFIG_IEEE80211R_AP
2112 if (fils_ft_len) {
2113 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2114 struct wpa_auth_config *conf = &wpa_auth->conf;
2115 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
2116
2117 if (wpa_derive_pmk_r0(fils_ft, fils_ft_len,
2118 conf->ssid, conf->ssid_len,
2119 conf->mobility_domain,
2120 conf->r0_key_holder,
2121 conf->r0_key_holder_len,
2122 sm->addr, pmk_r0, pmk_r0_name) < 0)
2123 return -1;
2124
2125 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", pmk_r0, PMK_LEN);
2126 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name",
2127 pmk_r0_name, WPA_PMK_NAME_LEN);
2128 wpa_ft_store_pmk_r0(wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
2129 sm->pairwise);
2130 os_memset(fils_ft, 0, sizeof(fils_ft));
2131 }
2132#endif /* CONFIG_IEEE80211R_AP */
2133
c4fd6d8a
JM		 2134 res = fils_key_auth_sk(ick, ick_len, snonce, anonce,
2135 sm->addr, sm->wpa_auth->addr,
80ddf5d9
JM		 2136 g_sta ? wpabuf_head(g_sta) : NULL,
2137 g_sta ? wpabuf_len(g_sta) : 0,
2138 g_ap ? wpabuf_head(g_ap) : NULL,
2139 g_ap ? wpabuf_len(g_ap) : 0,
c4fd6d8a
JM		 2140 sm->wpa_key_mgmt, sm->fils_key_auth_sta,
2141 sm->fils_key_auth_ap,
2142 &sm->fils_key_auth_len);
2143 os_memset(ick, 0, sizeof(ick));
78815f3d
JM		 2144
2145 /* Store nonces for (Re)Association Request/Response frame processing */
2146 os_memcpy(sm->SNonce, snonce, FILS_NONCE_LEN);
2147 os_memcpy(sm->ANonce, anonce, FILS_NONCE_LEN);
2148
c4fd6d8a
JM		 2149 return res;
2150}
2151
2152
3b5b7aa8 2153static int wpa_aead_decrypt(struct wpa_state_machine *sm, struct wpa_ptk *ptk,
75c8563e 2154 u8 *buf, size_t buf_len, u16 *_key_data_len)
3b5b7aa8
JM		 2155{
2156 struct ieee802_1x_hdr *hdr;
2157 struct wpa_eapol_key *key;
2158 u8 *pos;
2159 u16 key_data_len;
2160 u8 *tmp;
2161 const u8 *aad[1];
2162 size_t aad_len[1];
2163
75c8563e 2164 hdr = (struct ieee802_1x_hdr *) buf;
3b5b7aa8
JM		 2165 key = (struct wpa_eapol_key *) (hdr + 1);
2166 pos = (u8 *) (key + 1);
2167 key_data_len = WPA_GET_BE16(pos);
2168 if (key_data_len < AES_BLOCK_SIZE ||
2169 key_data_len > buf_len - sizeof(*hdr) - sizeof(*key) - 2) {
2170 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2171 "No room for AES-SIV data in the frame");
2172 return -1;
2173 }
2174 pos += 2; /* Pointing at the Encrypted Key Data field */
2175
2176 tmp = os_malloc(key_data_len);
2177 if (!tmp)
2178 return -1;
2179
2180 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to
2181 * to Key Data (exclusive). */
75c8563e
JM		 2182 aad[0] = buf;
2183 aad_len[0] = pos - buf;
3b5b7aa8
JM		 2184 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, key_data_len,
2185 1, aad, aad_len, tmp) < 0) {
2186 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2187 "Invalid AES-SIV data in the frame");
2188 bin_clear_free(tmp, key_data_len);
2189 return -1;
2190 }
2191
2192 /* AEAD decryption and validation completed successfully */
2193 key_data_len -= AES_BLOCK_SIZE;
2194 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data",
2195 tmp, key_data_len);
2196
2197 /* Replace Key Data field with the decrypted version */
2198 os_memcpy(pos, tmp, key_data_len);
2199 pos -= 2; /* Key Data Length field */
2200 WPA_PUT_BE16(pos, key_data_len);
2201 bin_clear_free(tmp, key_data_len);
2202 if (_key_data_len)
2203 *_key_data_len = key_data_len;
2204 return 0;
2205}
78815f3d
JM		 2206
2207
087631b9
JM		 2208const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
2209 const u8 *ies, size_t ies_len,
2210 const u8 *fils_session)
2211{
2212 const u8 *ie, *end;
2213 const u8 *session = NULL;
2214
2215 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2216 wpa_printf(MSG_DEBUG,
2217 "FILS: Not a FILS AKM - reject association");
2218 return NULL;
2219 }
2220
2221 /* Verify Session element */
2222 ie = ies;
2223 end = ((const u8 *) ie) + ies_len;
2224 while (ie + 1 < end) {
2225 if (ie + 2 + ie[1] > end)
2226 break;
2227 if (ie[0] == WLAN_EID_EXTENSION &&
2228 ie[1] >= 1 + FILS_SESSION_LEN &&
2229 ie[2] == WLAN_EID_EXT_FILS_SESSION) {
2230 session = ie;
2231 break;
2232 }
2233 ie += 2 + ie[1];
2234 }
2235
2236 if (!session) {
2237 wpa_printf(MSG_DEBUG,
2238 "FILS: %s: Could not find FILS Session element in Assoc Req - reject",
2239 __func__);
2240 return NULL;
2241 }
2242
2243 if (!fils_session) {
2244 wpa_printf(MSG_DEBUG,
2245 "FILS: %s: Could not find FILS Session element in STA entry - reject",
2246 __func__);
2247 return NULL;
2248 }
2249
2250 if (os_memcmp(fils_session, session + 3, FILS_SESSION_LEN) != 0) {
2251 wpa_printf(MSG_DEBUG, "FILS: Session mismatch");
2252 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session",
2253 fils_session, FILS_SESSION_LEN);
2254 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session",
2255 session + 3, FILS_SESSION_LEN);
2256 return NULL;
2257 }
2258 return session;
2259}
2260
2261
bd599353
JM		 2262int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
2263 size_t ies_len)
2264{
2265 struct ieee802_11_elems elems;
2266
2267 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2268 wpa_printf(MSG_DEBUG,
2269 "FILS: Failed to parse decrypted elements");
2270 return -1;
2271 }
2272
8b5ddda5
JM		 2273 if (!elems.fils_session) {
2274 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
2275 return -1;
2276 }
2277
bd599353
JM		 2278 if (!elems.fils_key_confirm) {
2279 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element");
2280 return -1;
2281 }
2282
2283 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) {
2284 wpa_printf(MSG_DEBUG,
2285 "FILS: Unexpected Key-Auth length %d (expected %d)",
2286 elems.fils_key_confirm_len,
2287 (int) sm->fils_key_auth_len);
2288 return -1;
2289 }
2290
2291 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_sta,
2292 sm->fils_key_auth_len) != 0) {
2293 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch");
2294 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth",
2295 elems.fils_key_confirm, elems.fils_key_confirm_len);
2296 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth",
2297 sm->fils_key_auth_sta, sm->fils_key_auth_len);
2298 return -1;
2299 }
2300
2301 return 0;
2302}
2303
2304
78815f3d
JM		 2305int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
2306 const struct ieee80211_mgmt *mgmt, size_t frame_len,
2307 u8 *pos, size_t left)
2308{
2309 u16 fc, stype;
2310 const u8 *end, *ie_start, *ie, *session, *crypt;
78815f3d
JM		 2311 const u8 *aad[5];
2312 size_t aad_len[5];
2313
2314 if (!sm || !sm->PTK_valid) {
2315 wpa_printf(MSG_DEBUG,
2316 "FILS: No KEK to decrypt Assocication Request frame");
2317 return -1;
2318 }
2319
2320 if (!wpa_key_mgmt_fils(sm->wpa_key_mgmt)) {
2321 wpa_printf(MSG_DEBUG,
2322 "FILS: Not a FILS AKM - reject association");
2323 return -1;
2324 }
2325
2326 end = ((const u8 *) mgmt) + frame_len;
2327 fc = le_to_host16(mgmt->frame_control);
2328 stype = WLAN_FC_GET_STYPE(fc);
2329 if (stype == WLAN_FC_STYPE_REASSOC_REQ)
2330 ie_start = mgmt->u.reassoc_req.variable;
2331 else
2332 ie_start = mgmt->u.assoc_req.variable;
2333 ie = ie_start;
2334
2335 /*
2336 * Find FILS Session element which is the last unencrypted element in
2337 * the frame.
2338 */
087631b9
JM		 2339 session = wpa_fils_validate_fils_session(sm, ie, end - ie,
2340 fils_session);
78815f3d 2341 if (!session) {
087631b9 2342 wpa_printf(MSG_DEBUG, "FILS: Session validation failed");
78815f3d
JM		 2343 return -1;
2344 }
087631b9 2345
78815f3d
JM		 2346 crypt = session + 2 + session[1];
2347
2348 if (end - crypt < AES_BLOCK_SIZE) {
2349 wpa_printf(MSG_DEBUG,
2350 "FILS: Too short frame to include AES-SIV data");
2351 return -1;
2352 }
2353
2354 /* AES-SIV AAD vectors */
2355
2356 /* The STA's MAC address */
2357 aad[0] = mgmt->sa;
2358 aad_len[0] = ETH_ALEN;
2359 /* The AP's BSSID */
2360 aad[1] = mgmt->da;
2361 aad_len[1] = ETH_ALEN;
2362 /* The STA's nonce */
2363 aad[2] = sm->SNonce;
2364 aad_len[2] = FILS_NONCE_LEN;
2365 /* The AP's nonce */
2366 aad[3] = sm->ANonce;
2367 aad_len[3] = FILS_NONCE_LEN;
2368 /*
2369 * The (Re)Association Request frame from the Capability Information
2370 * field to the FILS Session element (both inclusive).
2371 */
2372 aad[4] = (const u8 *) &mgmt->u.assoc_req.capab_info;
d77f3304 2373 aad_len[4] = crypt - aad[4];
78815f3d
JM		 2374
2375 if (aes_siv_decrypt(sm->PTK.kek, sm->PTK.kek_len, crypt, end - crypt,
d77f3304 2376 5, aad, aad_len, pos + (crypt - ie_start)) < 0) {
78815f3d
JM		 2377 wpa_printf(MSG_DEBUG,
2378 "FILS: Invalid AES-SIV data in the frame");
2379 return -1;
2380 }
2381 wpa_hexdump(MSG_DEBUG, "FILS: Decrypted Association Request elements",
2382 pos, left - AES_BLOCK_SIZE);
2383
bd599353
JM		 2384 if (wpa_fils_validate_key_confirm(sm, pos, left - AES_BLOCK_SIZE) < 0) {
2385 wpa_printf(MSG_DEBUG, "FILS: Key Confirm validation failed");
78815f3d
JM		 2386 return -1;
2387 }
2388
2389 return left - AES_BLOCK_SIZE;
2390}
2391
e73ffa09
JM		 2392
2393int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
91d91abf
JM		 2394 size_t current_len, size_t max_len,
2395 const struct wpabuf *hlp)
e73ffa09
JM		 2396{
2397 u8 *end = buf + max_len;
2398 u8 *pos = buf + current_len;
2399 struct ieee80211_mgmt *mgmt;
2400 struct wpabuf *plain;
e73ffa09
JM		 2401 const u8 *aad[5];
2402 size_t aad_len[5];
2403
2404 if (!sm || !sm->PTK_valid)
2405 return -1;
2406
2407 wpa_hexdump(MSG_DEBUG,
2408 "FILS: Association Response frame before FILS processing",
2409 buf, current_len);
2410
2411 mgmt = (struct ieee80211_mgmt *) buf;
2412
2413 /* AES-SIV AAD vectors */
2414
2415 /* The AP's BSSID */
2416 aad[0] = mgmt->sa;
2417 aad_len[0] = ETH_ALEN;
2418 /* The STA's MAC address */
2419 aad[1] = mgmt->da;
2420 aad_len[1] = ETH_ALEN;
2421 /* The AP's nonce */
2422 aad[2] = sm->ANonce;
2423 aad_len[2] = FILS_NONCE_LEN;
2424 /* The STA's nonce */
2425 aad[3] = sm->SNonce;
2426 aad_len[3] = FILS_NONCE_LEN;
2427 /*
2428 * The (Re)Association Response frame from the Capability Information
2429 * field (the same offset in both Association and Reassociation
2430 * Response frames) to the FILS Session element (both inclusive).
2431 */
2432 aad[4] = (const u8 *) &mgmt->u.assoc_resp.capab_info;
2433 aad_len[4] = pos - aad[4];
2434
2435 /* The following elements will be encrypted with AES-SIV */
9392859d
JM		 2436 plain = fils_prepare_plainbuf(sm, hlp);
2437 if (!plain) {
2438 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2439 return -1;
2440 }
2441
2442 if (pos + wpabuf_len(plain) + AES_BLOCK_SIZE > end) {
2443 wpa_printf(MSG_DEBUG,
2444 "FILS: Not enough room for FILS elements");
2445 wpabuf_free(plain);
2446 return -1;
2447 }
2448
2449 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: Association Response plaintext",
2450 plain);
2451
2452 if (aes_siv_encrypt(sm->PTK.kek, sm->PTK.kek_len,
2453 wpabuf_head(plain), wpabuf_len(plain),
2454 5, aad, aad_len, pos) < 0) {
2455 wpabuf_free(plain);
2456 return -1;
2457 }
2458
2459 wpa_hexdump(MSG_DEBUG,
2460 "FILS: Encrypted Association Response elements",
2461 pos, AES_BLOCK_SIZE + wpabuf_len(plain));
2462 current_len += wpabuf_len(plain) + AES_BLOCK_SIZE;
2463 wpabuf_free(plain);
2464
2465 sm->fils_completed = 1;
2466
2467 return current_len;
2468}
2469
2470
2471static struct wpabuf * fils_prepare_plainbuf(struct wpa_state_machine *sm,
2472 const struct wpabuf *hlp)
2473{
2474 struct wpabuf *plain;
2475 u8 *len, *tmp, *tmp2;
2476 u8 hdr[2];
2477 u8 *gtk, dummy_gtk[32];
2478 size_t gtk_len;
2479 struct wpa_group *gsm;
e73ffa09
JM		 2480
2481 plain = wpabuf_alloc(1000);
2482 if (!plain)
9392859d 2483 return NULL;
e73ffa09
JM		 2484
2485 /* TODO: FILS Public Key */
2486
2487 /* FILS Key Confirmation */
2488 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2489 wpabuf_put_u8(plain, 1 + sm->fils_key_auth_len); /* Length */
2490 /* Element ID Extension */
2491 wpabuf_put_u8(plain, WLAN_EID_EXT_FILS_KEY_CONFIRM);
2492 wpabuf_put_data(plain, sm->fils_key_auth_ap, sm->fils_key_auth_len);
2493
91d91abf
JM		 2494 /* FILS HLP Container */
2495 if (hlp)
2496 wpabuf_put_buf(plain, hlp);
e73ffa09
JM		 2497
2498 /* TODO: FILS IP Address Assignment */
2499
2500 /* Key Delivery */
2501 gsm = sm->group;
2502 wpabuf_put_u8(plain, WLAN_EID_EXTENSION); /* Element ID */
2503 len = wpabuf_put(plain, 1);
2504 wpabuf_put_u8(plain, WLAN_EID_EXT_KEY_DELIVERY);
2505 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN,
2506 wpabuf_put(plain, WPA_KEY_RSC_LEN));
2507 /* GTK KDE */
2508 gtk = gsm->GTK[gsm->GN - 1];
2509 gtk_len = gsm->GTK_len;
2510 if (sm->wpa_auth->conf.disable_gtk) {
2511 /*
2512 * Provide unique random GTK to each STA to prevent use
2513 * of GTK in the BSS.
2514 */
2515 if (random_get_bytes(dummy_gtk, gtk_len) < 0) {
2516 wpabuf_free(plain);
9392859d 2517 return NULL;
e73ffa09
JM		 2518 }
2519 gtk = dummy_gtk;
2520 }
2521 hdr[0] = gsm->GN & 0x03;
2522 hdr[1] = 0;
2523 tmp = wpabuf_put(plain, 0);
2524 tmp2 = wpa_add_kde(tmp, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2525 gtk, gtk_len);
2526 wpabuf_put(plain, tmp2 - tmp);
2527
2528 /* IGTK KDE */
2529 tmp = wpabuf_put(plain, 0);
2530 tmp2 = ieee80211w_kde_add(sm, tmp);
2531 wpabuf_put(plain, tmp2 - tmp);
2532
2533 *len = (u8 *) wpabuf_put(plain, 0) - len - 1;
9392859d 2534 return plain;
e73ffa09
JM		 2535}
2536
da24c5aa
JM		 2537
2538int fils_set_tk(struct wpa_state_machine *sm)
2539{
2540 enum wpa_alg alg;
2541 int klen;
2542
2f1357fb
JM		 2543 if (!sm || !sm->PTK_valid) {
2544 wpa_printf(MSG_DEBUG, "FILS: No valid PTK available to set TK");
2545 return -1;
2546 }
2547 if (sm->tk_already_set) {
2548 wpa_printf(MSG_DEBUG, "FILS: TK already set to the driver");
da24c5aa 2549 return -1;
2f1357fb 2550 }
da24c5aa
JM		 2551
2552 alg = wpa_cipher_to_alg(sm->pairwise);
2553 klen = wpa_cipher_key_len(sm->pairwise);
2554
2555 wpa_printf(MSG_DEBUG, "FILS: Configure TK to the driver");
2556 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2557 sm->PTK.tk, klen)) {
2558 wpa_printf(MSG_DEBUG, "FILS: Failed to set TK to the driver");
2559 return -1;
2560 }
2f1357fb 2561 sm->tk_already_set = TRUE;
da24c5aa
JM		 2562
2563 return 0;
2564}
2565
fa61bff6
JM		 2566
2567u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *buf,
8b5ddda5 2568 const u8 *fils_session, struct wpabuf *hlp)
fa61bff6
JM		 2569{
2570 struct wpabuf *plain;
2571 u8 *pos = buf;
2572
2573 /* FILS Session */
2574 *pos++ = WLAN_EID_EXTENSION; /* Element ID */
2575 *pos++ = 1 + FILS_SESSION_LEN; /* Length */
2576 *pos++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
2577 os_memcpy(pos, fils_session, FILS_SESSION_LEN);
2578 pos += FILS_SESSION_LEN;
2579
8b5ddda5 2580 plain = fils_prepare_plainbuf(sm, hlp);
fa61bff6
JM		 2581 if (!plain) {
2582 wpa_printf(MSG_DEBUG, "FILS: Plain buffer prep failed");
2583 return NULL;
2584 }
2585
2586 os_memcpy(pos, wpabuf_head(plain), wpabuf_len(plain));
2587 pos += wpabuf_len(plain);
2588
2589 wpa_printf(MSG_DEBUG, "%s: plain buf_len: %u", __func__,
2590 (unsigned int) wpabuf_len(plain));
2591 wpabuf_free(plain);
2592 sm->fils_completed = 1;
2593 return pos;
2594}
2595
3b5b7aa8
JM		 2596#endif /* CONFIG_FILS */
2597
2598
6fc6879b
JM		 2599SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
2600{
3b5b7aa8 2601 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
6fc6879b 2602 struct wpa_ptk PTK;
2c502460 2603 int ok = 0, psk_found = 0;
6fc6879b 2604 const u8 *pmk = NULL;
7a12edd1 2605 size_t pmk_len;
3b5b7aa8
JM		 2606 int ft;
2607 const u8 *eapol_key_ie, *key_data, *mic;
2608 u16 key_data_length;
2609 size_t mic_len, eapol_key_ie_len;
2610 struct ieee802_1x_hdr *hdr;
2611 struct wpa_eapol_key *key;
2612 struct wpa_eapol_ie_parse kde;
6fc6879b
JM		 2613
2614 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
2615 sm->EAPOLKeyReceived = FALSE;
68921e24 2616 sm->update_snonce = FALSE;
b729fd8d 2617 os_memset(&PTK, 0, sizeof(PTK));
6fc6879b 2618
567da5bb 2619 mic_len = wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len);
3b5b7aa8 2620
6fc6879b
JM		 2621 /* WPA with IEEE 802.1X: use the derived PMK from EAP
2622 * WPA-PSK: iterate through possible PSKs and select the one matching
2623 * the packet */
2624 for (;;) {
e61fea6b
JM		 2625 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) &&
2626 !wpa_key_mgmt_sae(sm->wpa_key_mgmt)) {
759fd76b 2627 pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
7a12edd1 2628 sm->p2p_dev_addr, pmk, &pmk_len);
6fc6879b
JM		 2629 if (pmk == NULL)
2630 break;
2c502460 2631 psk_found = 1;
207976f0 2632 } else {
6fc6879b 2633 pmk = sm->PMK;
207976f0
JM		 2634 pmk_len = sm->pmk_len;
2635 }
6fc6879b 2636
364c064a
JM		 2637 if (wpa_derive_ptk(sm, sm->SNonce, pmk, pmk_len, &PTK) < 0)
2638 break;
6fc6879b 2639
3b5b7aa8 2640 if (mic_len &&
567da5bb 2641 wpa_verify_key_mic(sm->wpa_key_mgmt, pmk_len, &PTK,
929a2ea5 2642 sm->last_rx_eapol_key,
6fc6879b
JM		 2643 sm->last_rx_eapol_key_len) == 0) {
2644 ok = 1;
2645 break;
2646 }
2647
3b5b7aa8 2648#ifdef CONFIG_FILS
75c8563e
JM		 2649 if (!mic_len &&
2650 wpa_aead_decrypt(sm, &PTK, sm->last_rx_eapol_key,
2651 sm->last_rx_eapol_key_len, NULL) == 0) {
3b5b7aa8
JM		 2652 ok = 1;
2653 break;
2654 }
2655#endif /* CONFIG_FILS */
2656
56586197 2657 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
6fc6879b
JM		 2658 break;
2659 }
2660
2661 if (!ok) {
2662 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2663 "invalid MIC in msg 2/4 of 4-Way Handshake");
2c502460
JM		 2664 if (psk_found)
2665 wpa_auth_psk_failure_report(sm->wpa_auth, sm->addr);
6fc6879b
JM		 2666 return;
2667 }
2668
3b5b7aa8
JM		 2669 /*
2670 * Note: last_rx_eapol_key length fields have already been validated in
2671 * wpa_receive().
2672 */
2673 hdr = (struct ieee802_1x_hdr *) sm->last_rx_eapol_key;
2674 key = (struct wpa_eapol_key *) (hdr + 1);
2675 mic = (u8 *) (key + 1);
2676 key_data = mic + mic_len + 2;
2677 key_data_length = WPA_GET_BE16(mic + mic_len);
2678 if (key_data_length > sm->last_rx_eapol_key_len - sizeof(*hdr) -
2679 sizeof(*key) - mic_len - 2)
2680 return;
2681
2682 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
2683 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
2684 "received EAPOL-Key msg 2/4 with invalid Key Data contents");
2685 return;
2686 }
2687 if (kde.rsn_ie) {
2688 eapol_key_ie = kde.rsn_ie;
2689 eapol_key_ie_len = kde.rsn_ie_len;
2690 } else if (kde.osen) {
2691 eapol_key_ie = kde.osen;
2692 eapol_key_ie_len = kde.osen_len;
2693 } else {
2694 eapol_key_ie = kde.wpa_ie;
2695 eapol_key_ie_len = kde.wpa_ie_len;
2696 }
2697 ft = sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt);
2698 if (sm->wpa_ie == NULL ||
2699 wpa_compare_rsn_ie(ft, sm->wpa_ie, sm->wpa_ie_len,
2700 eapol_key_ie, eapol_key_ie_len)) {
2701 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
2702 "WPA IE from (Re)AssocReq did not match with msg 2/4");
2703 if (sm->wpa_ie) {
2704 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
2705 sm->wpa_ie, sm->wpa_ie_len);
2706 }
2707 wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
2708 eapol_key_ie, eapol_key_ie_len);
2709 /* MLME-DEAUTHENTICATE.request */
567da5bb
JM		 2710 wpa_sta_disconnect(wpa_auth, sm->addr,
2711 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2712 return;
2713 }
4ec1fd8e 2714#ifdef CONFIG_IEEE80211R_AP
3b5b7aa8 2715 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
567da5bb
JM		 2716 wpa_sta_disconnect(wpa_auth, sm->addr,
2717 WLAN_REASON_PREV_AUTH_NOT_VALID);
3b5b7aa8
JM		 2718 return;
2719 }
4ec1fd8e 2720#endif /* CONFIG_IEEE80211R_AP */
3b5b7aa8
JM		 2721#ifdef CONFIG_P2P
2722 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
2723 wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
2724 int idx;
2725 wpa_printf(MSG_DEBUG,
2726 "P2P: IP address requested in EAPOL-Key exchange");
2727 idx = bitfield_get_first_zero(wpa_auth->ip_pool);
2728 if (idx >= 0) {
2729 u32 start = WPA_GET_BE32(wpa_auth->conf.ip_addr_start);
2730 bitfield_set(wpa_auth->ip_pool, idx);
2731 WPA_PUT_BE32(sm->ip_addr, start + idx);
2732 wpa_printf(MSG_DEBUG,
2733 "P2P: Assigned IP address %u.%u.%u.%u to "
2734 MACSTR, sm->ip_addr[0], sm->ip_addr[1],
2735 sm->ip_addr[2], sm->ip_addr[3],
2736 MAC2STR(sm->addr));
2737 }
2738 }
2739#endif /* CONFIG_P2P */
2740
4ec1fd8e 2741#ifdef CONFIG_IEEE80211R_AP
26e23750
JM		 2742 if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2743 /*
2744 * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2745 * with the value we derived.
2746 */
870834a1
JM		 2747 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2748 WPA_PMK_NAME_LEN) != 0) {
26e23750
JM		 2749 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2750 "PMKR1Name mismatch in FT 4-way "
2751 "handshake");
2752 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2753 "Supplicant",
2754 sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2755 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2756 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2757 return;
2758 }
2759 }
4ec1fd8e 2760#endif /* CONFIG_IEEE80211R_AP */
26e23750 2761
e4bf4db9 2762 sm->pending_1_of_4_timeout = 0;
6fc6879b
JM		 2763 eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2764
56586197 2765 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
6fc6879b
JM		 2766 /* PSK may have changed from the previous choice, so update
2767 * state machine data based on whatever PSK was selected here.
2768 */
2769 os_memcpy(sm->PMK, pmk, PMK_LEN);
207976f0 2770 sm->pmk_len = PMK_LEN;
6fc6879b
JM		 2771 }
2772
2773 sm->MICVerified = TRUE;
2774
2775 os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2776 sm->PTK_valid = TRUE;
2777}
2778
2779
2780SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2781{
2782 SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2783 sm->TimeoutCtr = 0;
2784}
2785
2786
2787#ifdef CONFIG_IEEE80211W
2788
2789static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2790{
2791 if (sm->mgmt_frame_prot) {
8dd9f9cd
JM		 2792 size_t len;
2793 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2794 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
6fc6879b
JM		 2795 }
2796
2797 return 0;
2798}
2799
2800
2801static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2802{
2803 struct wpa_igtk_kde igtk;
2804 struct wpa_group *gsm = sm->group;
03610ad2 2805 u8 rsc[WPA_KEY_RSC_LEN];
8dd9f9cd 2806 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
6fc6879b
JM		 2807
2808 if (!sm->mgmt_frame_prot)
2809 return pos;
2810
2811 igtk.keyid[0] = gsm->GN_igtk;
2812 igtk.keyid[1] = 0;
7b1080da 2813 if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
03610ad2 2814 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
6fc6879b 2815 os_memset(igtk.pn, 0, sizeof(igtk.pn));
03610ad2
JM		 2816 else
2817 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
8dd9f9cd 2818 os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
83421850
JM		 2819 if (sm->wpa_auth->conf.disable_gtk) {
2820 /*
2821 * Provide unique random IGTK to each STA to prevent use of
2822 * IGTK in the BSS.
2823 */
8dd9f9cd 2824 if (random_get_bytes(igtk.igtk, len) < 0)
83421850
JM		 2825 return pos;
2826 }
6fc6879b 2827 pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
8dd9f9cd
JM		 2828 (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2829 NULL, 0);
6fc6879b
JM		 2830
2831 return pos;
2832}
2833
2834#else /* CONFIG_IEEE80211W */
2835
2836static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2837{
2838 return 0;
2839}
2840
2841
2842static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2843{
2844 return pos;
2845}
2846
2847#endif /* CONFIG_IEEE80211W */
2848
2849
2850SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2851{
83421850 2852 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
6fc6879b
JM		 2853 size_t gtk_len, kde_len;
2854 struct wpa_group *gsm = sm->group;
2855 u8 *wpa_ie;
2856 int wpa_ie_len, secure, keyidx, encr = 0;
2857
2858 SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2859 sm->TimeoutEvt = FALSE;
bae61562
JM		 2860
2861 sm->TimeoutCtr++;
6f234c1e
JM		 2862 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
2863 sm->TimeoutCtr > 1) {
2864 /* Do not allow retransmission of EAPOL-Key msg 3/4 */
2865 return;
2866 }
41f140d3 2867 if (sm->TimeoutCtr > sm->wpa_auth->conf.wpa_pairwise_update_count) {
bae61562
JM		 2868 /* No point in sending the EAPOL-Key - we will disconnect
2869 * immediately following this. */
2870 return;
2871 }
2872
86dfabb8
JM		 2873 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2874 GTK[GN], IGTK, [FTIE], [TIE * 2])
6fc6879b
JM		 2875 */
2876 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2877 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
86dfabb8 2878 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
6fc6879b
JM		 2879 wpa_ie = sm->wpa_auth->wpa_ie;
2880 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2881 if (sm->wpa == WPA_VERSION_WPA &&
2882 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2883 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
774d4145 2884 /* WPA-only STA, remove RSN IE and possible MDIE */
6fc6879b 2885 wpa_ie = wpa_ie + wpa_ie[1] + 2;
774d4145
JM		 2886 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2887 wpa_ie = wpa_ie + wpa_ie[1] + 2;
6fc6879b
JM		 2888 wpa_ie_len = wpa_ie[1] + 2;
2889 }
2890 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2891 "sending 3/4 msg of 4-Way Handshake");
2892 if (sm->wpa == WPA_VERSION_WPA2) {
2893 /* WPA2 send GTK in the 4-way handshake */
2894 secure = 1;
2895 gtk = gsm->GTK[gsm->GN - 1];
2896 gtk_len = gsm->GTK_len;
83421850
JM		 2897 if (sm->wpa_auth->conf.disable_gtk) {
2898 /*
2899 * Provide unique random GTK to each STA to prevent use
2900 * of GTK in the BSS.
2901 */
2902 if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2903 return;
2904 gtk = dummy_gtk;
2905 }
6fc6879b
JM		 2906 keyidx = gsm->GN;
2907 _rsc = rsc;
2908 encr = 1;
2909 } else {
2910 /* WPA does not include GTK in msg 3/4 */
2911 secure = 0;
2912 gtk = NULL;
2913 gtk_len = 0;
2914 keyidx = 0;
2915 _rsc = NULL;
0d442aff
JM		 2916 if (sm->rx_eapol_key_secure) {
2917 /*
2918 * It looks like Windows 7 supplicant tries to use
2919 * Secure bit in msg 2/4 after having reported Michael
2920 * MIC failure and it then rejects the 4-way handshake
2921 * if msg 3/4 does not set Secure bit. Work around this
2922 * by setting the Secure bit here even in the case of
2923 * WPA if the supplicant used it first.
2924 */
2925 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4740d5b9
JM		 2926 "STA used Secure bit in WPA msg 2/4 - "
2927 "set Secure for 3/4 as workaround");
0d442aff
JM		 2928 secure = 1;
2929 }
6fc6879b
JM		 2930 }
2931
2932 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2933 if (gtk)
2934 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4ec1fd8e 2935#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2936 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2937 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2938 kde_len += 300; /* FTIE + 2 * TIE */
2939 }
4ec1fd8e 2940#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 2941#ifdef CONFIG_P2P
2942 if (WPA_GET_BE32(sm->ip_addr) > 0)
2943 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2944#endif /* CONFIG_P2P */
6fc6879b
JM		 2945 kde = os_malloc(kde_len);
2946 if (kde == NULL)
2947 return;
2948
2949 pos = kde;
2950 os_memcpy(pos, wpa_ie, wpa_ie_len);
2951 pos += wpa_ie_len;
4ec1fd8e 2952#ifdef CONFIG_IEEE80211R_AP
26e23750 2953 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
59e78c24
JM		 2954 int res;
2955 size_t elen;
2956
2957 elen = pos - kde;
2958 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
26e23750
JM		 2959 if (res < 0) {
2960 wpa_printf(MSG_ERROR, "FT: Failed to insert "
2961 "PMKR1Name into RSN IE in EAPOL-Key data");
2962 os_free(kde);
2963 return;
2964 }
59e78c24
JM		 2965 pos -= wpa_ie_len;
2966 pos += elen;
26e23750 2967 }
4ec1fd8e 2968#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 2969 if (gtk) {
2970 u8 hdr[2];
2971 hdr[0] = keyidx & 0x03;
2972 hdr[1] = 0;
2973 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2974 gtk, gtk_len);
2975 }
2976 pos = ieee80211w_kde_add(sm, pos);
2977
4ec1fd8e 2978#ifdef CONFIG_IEEE80211R_AP
86dfabb8
JM		 2979 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2980 int res;
2981 struct wpa_auth_config *conf;
2982
2983 conf = &sm->wpa_auth->conf;
9257610a
JM		 2984 if (sm->assoc_resp_ftie &&
2985 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
2986 os_memcpy(pos, sm->assoc_resp_ftie,
2987 2 + sm->assoc_resp_ftie[1]);
2988 res = 2 + sm->assoc_resp_ftie[1];
2989 } else {
2990 res = wpa_write_ftie(conf, conf->r0_key_holder,
2991 conf->r0_key_holder_len,
2992 NULL, NULL, pos,
2993 kde + kde_len - pos,
2994 NULL, 0);
2995 }
86dfabb8
JM		 2996 if (res < 0) {
2997 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2998 "into EAPOL-Key Key Data");
2999 os_free(kde);
3000 return;
3001 }
3002 pos += res;
3003
3004 /* TIE[ReassociationDeadline] (TU) */
3005 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3006 *pos++ = 5;
3007 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
3008 WPA_PUT_LE32(pos, conf->reassociation_deadline);
3009 pos += 4;
3010
3011 /* TIE[KeyLifetime] (seconds) */
3012 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
3013 *pos++ = 5;
3014 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
3015 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
3016 pos += 4;
3017 }
4ec1fd8e 3018#endif /* CONFIG_IEEE80211R_AP */
25ef8529
JM		 3019#ifdef CONFIG_P2P
3020 if (WPA_GET_BE32(sm->ip_addr) > 0) {
3021 u8 addr[3 * 4];
3022 os_memcpy(addr, sm->ip_addr, 4);
3023 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
3024 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
3025 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
3026 addr, sizeof(addr), NULL, 0);
3027 }
3028#endif /* CONFIG_P2P */
86dfabb8 3029
6fc6879b 3030 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3031 (secure ? WPA_KEY_INFO_SECURE : 0) |
567da5bb
JM		 3032 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3033 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3034 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
3035 WPA_KEY_INFO_KEY_TYPE,
3036 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
3037 os_free(kde);
6fc6879b
JM		 3038}
3039
3040
3041SM_STATE(WPA_PTK, PTKINITDONE)
3042{
3043 SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
3044 sm->EAPOLKeyReceived = FALSE;
3045 if (sm->Pair) {
c3550295
JM		 3046 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
3047 int klen = wpa_cipher_key_len(sm->pairwise);
6fc6879b 3048 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
98cd3d1c 3049 sm->PTK.tk, klen)) {
567da5bb
JM		 3050 wpa_sta_disconnect(sm->wpa_auth, sm->addr,
3051 WLAN_REASON_PREV_AUTH_NOT_VALID);
6fc6879b
JM		 3052 return;
3053 }
3054 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
3055 sm->pairwise_set = TRUE;
3056
581a8cde
JM		 3057 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
3058 eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
3059 eloop_register_timeout(sm->wpa_auth->conf.
3060 wpa_ptk_rekey, 0, wpa_rekey_ptk,
3061 sm->wpa_auth, sm);
3062 }
3063
a1ea1b45 3064 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
567da5bb 3065 sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP ||
a1ea1b45 3066 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE) {
6fc6879b
JM		 3067 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3068 WPA_EAPOL_authorized, 1);
3069 }
3070 }
3071
3072 if (0 /* IBSS == TRUE */) {
3073 sm->keycount++;
3074 if (sm->keycount == 2) {
3075 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
3076 WPA_EAPOL_portValid, 1);
3077 }
3078 } else {
3079 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
3080 1);
3081 }
3082 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
3083 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
3084 if (sm->wpa == WPA_VERSION_WPA)
3085 sm->PInitAKeys = TRUE;
3086 else
3087 sm->has_GTK = TRUE;
3088 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3089 "pairwise key handshake completed (%s)",
3090 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3091
4ec1fd8e 3092#ifdef CONFIG_IEEE80211R_AP
6fc6879b 3093 wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
4ec1fd8e 3094#endif /* CONFIG_IEEE80211R_AP */
6fc6879b
JM		 3095}
3096
3097
3098SM_STEP(WPA_PTK)
3099{
3100 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
3101
3102 if (sm->Init)
3103 SM_ENTER(WPA_PTK, INITIALIZE);
3104 else if (sm->Disconnect
1aae01fc
BG		 3105 /* || FIX: dot11RSNAConfigSALifetime timeout */) {
3106 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
3107 "WPA_PTK: sm->Disconnect");
6fc6879b 3108 SM_ENTER(WPA_PTK, DISCONNECT);
1aae01fc 3109 }
6fc6879b
JM		 3110 else if (sm->DeauthenticationRequest)
3111 SM_ENTER(WPA_PTK, DISCONNECTED);
3112 else if (sm->AuthenticationRequest)
3113 SM_ENTER(WPA_PTK, AUTHENTICATION);
3114 else if (sm->ReAuthenticationRequest)
3115 SM_ENTER(WPA_PTK, AUTHENTICATION2);
0adc9b28
JM		 3116 else if (sm->PTKRequest) {
3117 if (wpa_auth_sm_ptk_update(sm) < 0)
3118 SM_ENTER(WPA_PTK, DISCONNECTED);
3119 else
3120 SM_ENTER(WPA_PTK, PTKSTART);
3121 } else switch (sm->wpa_ptk_state) {
6fc6879b
JM		 3122 case WPA_PTK_INITIALIZE:
3123 break;
3124 case WPA_PTK_DISCONNECT:
3125 SM_ENTER(WPA_PTK, DISCONNECTED);
3126 break;
3127 case WPA_PTK_DISCONNECTED:
3128 SM_ENTER(WPA_PTK, INITIALIZE);
3129 break;
3130 case WPA_PTK_AUTHENTICATION:
3131 SM_ENTER(WPA_PTK, AUTHENTICATION2);
3132 break;
3133 case WPA_PTK_AUTHENTICATION2:
56586197 3134 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
6fc6879b
JM		 3135 wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
3136 WPA_EAPOL_keyRun) > 0)
3137 SM_ENTER(WPA_PTK, INITPMK);
a1ea1b45
JM		 3138 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt) ||
3139 sm->wpa_key_mgmt == WPA_KEY_MGMT_OWE
6fc6879b
JM		 3140 /* FIX: && 802.1X::keyRun */)
3141 SM_ENTER(WPA_PTK, INITPSK);
567da5bb
JM		 3142 else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP)
3143 SM_ENTER(WPA_PTK, INITPMK);
6fc6879b
JM		 3144 break;
3145 case WPA_PTK_INITPMK:
3146 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
567da5bb 3147 WPA_EAPOL_keyAvailable) > 0) {
6fc6879b 3148 SM_ENTER(WPA_PTK, PTKSTART);
567da5bb
JM		 3149#ifdef CONFIG_DPP
3150 } else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && sm->pmksa) {
3151 SM_ENTER(WPA_PTK, PTKSTART);
3152#endif /* CONFIG_DPP */
3153 } else {
6fc6879b 3154 wpa_auth->dot11RSNA4WayHandshakeFailures++;
1aae01fc
BG		 3155 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3156 "INITPMK - keyAvailable = false");
6fc6879b
JM		 3157 SM_ENTER(WPA_PTK, DISCONNECT);
3158 }
3159 break;
3160 case WPA_PTK_INITPSK:
759fd76b 3161 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
7a12edd1 3162 NULL, NULL)) {
6fc6879b 3163 SM_ENTER(WPA_PTK, PTKSTART);
e61fea6b
JM		 3164#ifdef CONFIG_SAE
3165 } else if (wpa_auth_uses_sae(sm) && sm->pmksa) {
3166 SM_ENTER(WPA_PTK, PTKSTART);
3167#endif /* CONFIG_SAE */
3168 } else {
6fc6879b
JM		 3169 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3170 "no PSK configured for the STA");
3171 wpa_auth->dot11RSNA4WayHandshakeFailures++;
3172 SM_ENTER(WPA_PTK, DISCONNECT);
3173 }
3174 break;
3175 case WPA_PTK_PTKSTART:
3176 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3177 sm->EAPOLKeyPairwise)
3178 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3179 else if (sm->TimeoutCtr >
41f140d3 3180 sm->wpa_auth->conf.wpa_pairwise_update_count) {
6fc6879b 3181 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3182 wpa_auth_vlogger(
3183 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3184 "PTKSTART: Retry limit %u reached",
3185 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3186 SM_ENTER(WPA_PTK, DISCONNECT);
3187 } else if (sm->TimeoutEvt)
3188 SM_ENTER(WPA_PTK, PTKSTART);
3189 break;
3190 case WPA_PTK_PTKCALCNEGOTIATING:
3191 if (sm->MICVerified)
3192 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
3193 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3194 sm->EAPOLKeyPairwise)
3195 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3196 else if (sm->TimeoutEvt)
3197 SM_ENTER(WPA_PTK, PTKSTART);
3198 break;
3199 case WPA_PTK_PTKCALCNEGOTIATING2:
3200 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3201 break;
3202 case WPA_PTK_PTKINITNEGOTIATING:
68921e24
JM		 3203 if (sm->update_snonce)
3204 SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
3205 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3206 sm->EAPOLKeyPairwise && sm->MICVerified)
6fc6879b
JM		 3207 SM_ENTER(WPA_PTK, PTKINITDONE);
3208 else if (sm->TimeoutCtr >
6f234c1e
JM		 3209 sm->wpa_auth->conf.wpa_pairwise_update_count ||
3210 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3211 sm->TimeoutCtr > 1)) {
6fc6879b 3212 wpa_auth->dot11RSNA4WayHandshakeFailures++;
41f140d3
GK		 3213 wpa_auth_vlogger(
3214 sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3215 "PTKINITNEGOTIATING: Retry limit %u reached",
3216 sm->wpa_auth->conf.wpa_pairwise_update_count);
6fc6879b
JM		 3217 SM_ENTER(WPA_PTK, DISCONNECT);
3218 } else if (sm->TimeoutEvt)
3219 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
3220 break;
3221 case WPA_PTK_PTKINITDONE:
3222 break;
3223 }
3224}
3225
3226
3227SM_STATE(WPA_PTK_GROUP, IDLE)
3228{
3229 SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
3230 if (sm->Init) {
3231 /* Init flag is not cleared here, so avoid busy
3232 * loop by claiming nothing changed. */
3233 sm->changed = FALSE;
3234 }
3235 sm->GTimeoutCtr = 0;
3236}
3237
3238
3239SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
3240{
3241 u8 rsc[WPA_KEY_RSC_LEN];
3242 struct wpa_group *gsm = sm->group;
e41e4f9e
JM		 3243 const u8 *kde;
3244 u8 *kde_buf = NULL, *pos, hdr[2];
6fc6879b 3245 size_t kde_len;
83421850 3246 u8 *gtk, dummy_gtk[32];
6fc6879b
JM		 3247
3248 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
bae61562
JM		 3249
3250 sm->GTimeoutCtr++;
6f234c1e
JM		 3251 if (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3252 sm->GTimeoutCtr > 1) {
3253 /* Do not allow retransmission of EAPOL-Key group msg 1/2 */
3254 return;
3255 }
41f140d3 3256 if (sm->GTimeoutCtr > sm->wpa_auth->conf.wpa_group_update_count) {
bae61562
JM		 3257 /* No point in sending the EAPOL-Key - we will disconnect
3258 * immediately following this. */
3259 return;
3260 }
3261
6fc6879b
JM		 3262 if (sm->wpa == WPA_VERSION_WPA)
3263 sm->PInitAKeys = FALSE;
3264 sm->TimeoutEvt = FALSE;
3265 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
3266 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
3267 if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
3268 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
3269 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3270 "sending 1/2 msg of Group Key Handshake");
3271
83421850
JM		 3272 gtk = gsm->GTK[gsm->GN - 1];
3273 if (sm->wpa_auth->conf.disable_gtk) {
3274 /*
3275 * Provide unique random GTK to each STA to prevent use
3276 * of GTK in the BSS.
3277 */
3278 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
3279 return;
3280 gtk = dummy_gtk;
3281 }
6fc6879b
JM		 3282 if (sm->wpa == WPA_VERSION_WPA2) {
3283 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
3284 ieee80211w_kde_len(sm);
e41e4f9e
JM		 3285 kde_buf = os_malloc(kde_len);
3286 if (kde_buf == NULL)
6fc6879b
JM		 3287 return;
3288
e41e4f9e 3289 kde = pos = kde_buf;
6fc6879b
JM		 3290 hdr[0] = gsm->GN & 0x03;
3291 hdr[1] = 0;
3292 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
83421850 3293 gtk, gsm->GTK_len);
6fc6879b 3294 pos = ieee80211w_kde_add(sm, pos);
e41e4f9e 3295 kde_len = pos - kde;
6fc6879b 3296 } else {
83421850 3297 kde = gtk;
e41e4f9e 3298 kde_len = gsm->GTK_len;
6fc6879b
JM		 3299 }
3300
3301 wpa_send_eapol(sm->wpa_auth, sm,
b729fd8d 3302 WPA_KEY_INFO_SECURE |
567da5bb
JM		 3303 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
3304 WPA_KEY_INFO_MIC : 0) |
6fc6879b
JM		 3305 WPA_KEY_INFO_ACK |
3306 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
b0fb2be7 3307 rsc, NULL, kde, kde_len, gsm->GN, 1);
e41e4f9e
JM		 3308
3309 os_free(kde_buf);
6fc6879b
JM		 3310}
3311
3312
3313SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
3314{
3315 SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
3316 sm->EAPOLKeyReceived = FALSE;
3317 if (sm->GUpdateStationKeys)
3318 sm->group->GKeyDoneStations--;
3319 sm->GUpdateStationKeys = FALSE;
3320 sm->GTimeoutCtr = 0;
3321 /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
3322 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3323 "group key handshake completed (%s)",
3324 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
3325 sm->has_GTK = TRUE;
3326}
3327
3328
3329SM_STATE(WPA_PTK_GROUP, KEYERROR)
3330{
3331 SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
3332 if (sm->GUpdateStationKeys)
3333 sm->group->GKeyDoneStations--;
3334 sm->GUpdateStationKeys = FALSE;
3335 sm->Disconnect = TRUE;
4bb9b674
GK		 3336 wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
3337 "group key handshake failed (%s) after %u tries",
3338 sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN",
3339 sm->wpa_auth->conf.wpa_group_update_count);
6fc6879b
JM		 3340}
3341
3342
3343SM_STEP(WPA_PTK_GROUP)
3344{
9663596f 3345 if (sm->Init || sm->PtkGroupInit) {
6fc6879b 3346 SM_ENTER(WPA_PTK_GROUP, IDLE);
9663596f
JM		 3347 sm->PtkGroupInit = FALSE;
3348 } else switch (sm->wpa_ptk_group_state) {
6fc6879b
JM		 3349 case WPA_PTK_GROUP_IDLE:
3350 if (sm->GUpdateStationKeys ||
3351 (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
3352 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3353 break;
3354 case WPA_PTK_GROUP_REKEYNEGOTIATING:
3355 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
3356 !sm->EAPOLKeyPairwise && sm->MICVerified)
3357 SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
3358 else if (sm->GTimeoutCtr >
6f234c1e
JM		 3359 sm->wpa_auth->conf.wpa_group_update_count ||
3360 (sm->wpa_auth->conf.wpa_disable_eapol_key_retries &&
3361 sm->GTimeoutCtr > 1))
6fc6879b
JM		 3362 SM_ENTER(WPA_PTK_GROUP, KEYERROR);
3363 else if (sm->TimeoutEvt)
3364 SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
3365 break;
3366 case WPA_PTK_GROUP_KEYERROR:
3367 SM_ENTER(WPA_PTK_GROUP, IDLE);
3368 break;
3369 case WPA_PTK_GROUP_REKEYESTABLISHED:
3370 SM_ENTER(WPA_PTK_GROUP, IDLE);
3371 break;
3372 }
3373}
3374
3375
3376static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
3377 struct wpa_group *group)
3378{
3379 int ret = 0;
3380
6fc6879b
JM		 3381 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3382 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3383 if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
3384 wpa_auth->addr, group->GNonce,
3385 group->GTK[group->GN - 1], group->GTK_len) < 0)
3386 ret = -1;
5cb9d5c3
JM		 3387 wpa_hexdump_key(MSG_DEBUG, "GTK",
3388 group->GTK[group->GN - 1], group->GTK_len);
6fc6879b
JM		 3389
3390#ifdef CONFIG_IEEE80211W
70f8cc8e 3391 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
8dd9f9cd
JM		 3392 size_t len;
3393 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
5cb9d5c3
JM		 3394 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
3395 inc_byte_array(group->Counter, WPA_NONCE_LEN);
3c7302c2
JM		 3396 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
3397 wpa_auth->addr, group->GNonce,
8dd9f9cd 3398 group->IGTK[group->GN_igtk - 4], len) < 0)
3c7302c2 3399 ret = -1;
6fc6879b 3400 wpa_hexdump_key(MSG_DEBUG, "IGTK",
8dd9f9cd 3401 group->IGTK[group->GN_igtk - 4], len);
6fc6879b
JM		 3402 }
3403#endif /* CONFIG_IEEE80211W */
3404
3405 return ret;
3406}
3407
3408
3409static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
3410 struct wpa_group *group)
3411{
3412 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3413 "GTK_INIT (VLAN-ID %d)", group->vlan_id);
3414 group->changed = FALSE; /* GInit is not cleared here; avoid loop */
3415 group->wpa_group_state = WPA_GROUP_GTK_INIT;
3416
3417 /* GTK[0..N] = 0 */
3418 os_memset(group->GTK, 0, sizeof(group->GTK));
3419 group->GN = 1;
3420 group->GM = 2;
3421#ifdef CONFIG_IEEE80211W
3422 group->GN_igtk = 4;
3423 group->GM_igtk = 5;
3424#endif /* CONFIG_IEEE80211W */
3425 /* GTK[GN] = CalcGTK() */
3426 wpa_gtk_update(wpa_auth, group);
3427}
3428
3429
3430static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
3431{
473b6f22
MB		 3432 if (ctx != NULL && ctx != sm->group)
3433 return 0;
3434
6fc6879b
JM		 3435 if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
3436 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3437 "Not in PTKINITDONE; skip Group Key update");
3c183894 3438 sm->GUpdateStationKeys = FALSE;
6fc6879b
JM		 3439 return 0;
3440 }
9663596f
JM		 3441 if (sm->GUpdateStationKeys) {
3442 /*
3c183894
JM		 3443 * This should not really happen, so add a debug log entry.
3444 * Since we clear the GKeyDoneStations before the loop, the
3445 * station needs to be counted here anyway.
9663596f
JM		 3446 */
3447 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
3c183894
JM		 3448 "GUpdateStationKeys was already set when "
3449 "marking station for GTK rekeying");
9663596f 3450 }
3c183894 3451
ad3872a3 3452 /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
d32d94db
XC		 3453 if (sm->is_wnmsleep)
3454 return 0;
d32d94db 3455
3c183894
JM		 3456 sm->group->GKeyDoneStations++;
3457 sm->GUpdateStationKeys = TRUE;
3458
6fc6879b
JM		 3459 wpa_sm_step(sm);
3460 return 0;
3461}
3462
3463
b5bf84ba 3464#ifdef CONFIG_WNM_AP
ad3872a3 3465/* update GTK when exiting WNM-Sleep Mode */
d32d94db
XC		 3466void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
3467{
629edfef 3468 if (sm == NULL || sm->is_wnmsleep)
d32d94db
XC		 3469 return;
3470
3471 wpa_group_update_sta(sm, NULL);
3472}
3473
3474
3475void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
3476{
629edfef
JM		 3477 if (sm)
3478 sm->is_wnmsleep = !!flag;
d32d94db
XC		 3479}
3480
3481
3482int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3483{
d32d94db 3484 struct wpa_group *gsm = sm->group;
835822d4 3485 u8 *start = pos;
d32d94db
XC		 3486
3487 /*
835822d4 3488 * GTK subelement:
d32d94db 3489 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
835822d4 3490 * Key[5..32]
d32d94db 3491 */
835822d4
JM		 3492 *pos++ = WNM_SLEEP_SUBELEM_GTK;
3493 *pos++ = 11 + gsm->GTK_len;
d32d94db 3494 /* Key ID in B0-B1 of Key Info */
835822d4
JM		 3495 WPA_PUT_LE16(pos, gsm->GN & 0x03);
3496 pos += 2;
3497 *pos++ = gsm->GTK_len;
3498 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
d32d94db 3499 return 0;
835822d4
JM		 3500 pos += 8;
3501 os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
3502 pos += gsm->GTK_len;
d32d94db 3503
835822d4
JM		 3504 wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
3505 gsm->GN);
3506 wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
d32d94db 3507 gsm->GTK[gsm->GN - 1], gsm->GTK_len);
d32d94db 3508
835822d4 3509 return pos - start;
d32d94db
XC		 3510}
3511
3512
3513#ifdef CONFIG_IEEE80211W
3514int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
3515{
d32d94db 3516 struct wpa_group *gsm = sm->group;
835822d4 3517 u8 *start = pos;
8dd9f9cd 3518 size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
d32d94db 3519
835822d4
JM		 3520 /*
3521 * IGTK subelement:
3522 * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
3523 */
3524 *pos++ = WNM_SLEEP_SUBELEM_IGTK;
8dd9f9cd 3525 *pos++ = 2 + 6 + len;
835822d4
JM		 3526 WPA_PUT_LE16(pos, gsm->GN_igtk);
3527 pos += 2;
3528 if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
d32d94db 3529 return 0;
835822d4 3530 pos += 6;
d32d94db 3531
8dd9f9cd
JM		 3532 os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
3533 pos += len;
d32d94db 3534
835822d4
JM		 3535 wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
3536 gsm->GN_igtk);
3537 wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
8dd9f9cd 3538 gsm->IGTK[gsm->GN_igtk - 4], len);
d32d94db 3539
835822d4 3540 return pos - start;
d32d94db
XC		 3541}
3542#endif /* CONFIG_IEEE80211W */
b5bf84ba 3543#endif /* CONFIG_WNM_AP */
d32d94db
XC		 3544
3545
6fc6879b
JM		 3546static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
3547 struct wpa_group *group)
3548{
3549 int tmp;
3550
3551 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3552 "SETKEYS (VLAN-ID %d)", group->vlan_id);
3553 group->changed = TRUE;
3554 group->wpa_group_state = WPA_GROUP_SETKEYS;
3555 group->GTKReKey = FALSE;
3556 tmp = group->GM;
3557 group->GM = group->GN;
3558 group->GN = tmp;
3559#ifdef CONFIG_IEEE80211W
3560 tmp = group->GM_igtk;
3561 group->GM_igtk = group->GN_igtk;
3562 group->GN_igtk = tmp;
3563#endif /* CONFIG_IEEE80211W */
3564 /* "GKeyDoneStations = GNoStations" is done in more robust way by
3565 * counting the STAs that are marked with GUpdateStationKeys instead of
3566 * including all STAs that could be in not-yet-completed state. */
3567 wpa_gtk_update(wpa_auth, group);
3568
3c183894
JM		 3569 if (group->GKeyDoneStations) {
3570 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
3571 "GKeyDoneStations=%d when starting new GTK rekey",
3572 group->GKeyDoneStations);
3573 group->GKeyDoneStations = 0;
3574 }
473b6f22 3575 wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
6fc6879b
JM		 3576 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
3577 group->GKeyDoneStations);
3578}
3579
3580
1bdb7ab3
JM		 3581static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
3582 struct wpa_group *group)
6fc6879b 3583{
3c7302c2
JM		 3584 int ret = 0;
3585
3c7302c2 3586 if (wpa_auth_set_key(wpa_auth, group->vlan_id,
c3550295 3587 wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
0382097e
JM		 3588 broadcast_ether_addr, group->GN,
3589 group->GTK[group->GN - 1], group->GTK_len) < 0)
3c7302c2 3590 ret = -1;
6fc6879b
JM		 3591
3592#ifdef CONFIG_IEEE80211W
8dd9f9cd
JM		 3593 if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3594 enum wpa_alg alg;
3595 size_t len;
3596
3597 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
3598 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
3599
3600 if (ret == 0 &&
3601 wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
3602 broadcast_ether_addr, group->GN_igtk,
3603 group->IGTK[group->GN_igtk - 4], len) < 0)
3604 ret = -1;
3605 }
6fc6879b 3606#endif /* CONFIG_IEEE80211W */
3c7302c2
JM		 3607
3608 return ret;
6fc6879b
JM		 3609}
3610
3611
7d7f7be2
JM		 3612static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
3613{
3614 if (sm->group == ctx) {
3615 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
3616 " for discconnection due to fatal failure",
3617 MAC2STR(sm->addr));
3618 sm->Disconnect = TRUE;
3619 }
3620
3621 return 0;
3622}
3623
3624
3625static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
3626 struct wpa_group *group)
3627{
3628 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
3629 group->changed = TRUE;
3630 group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
3631 wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
3632}
3633
3634
1bdb7ab3
JM		 3635static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
3636 struct wpa_group *group)
3637{
3638 wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
3639 "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
3640 group->changed = TRUE;
3641 group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
3642
7d7f7be2
JM		 3643 if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
3644 wpa_group_fatal_failure(wpa_auth, group);
1bdb7ab3 3645 return -1;
7d7f7be2 3646 }
1bdb7ab3
JM		 3647
3648 return 0;
3649}
3650
3651
6fc6879b
JM		 3652static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
3653 struct wpa_group *group)
3654{
3655 if (group->GInit) {
3656 wpa_group_gtk_init(wpa_auth, group);
7d7f7be2
JM		 3657 } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
3658 /* Do not allow group operations */
6fc6879b
JM		 3659 } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
3660 group->GTKAuthenticator) {
3661 wpa_group_setkeysdone(wpa_auth, group);
3662 } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
3663 group->GTKReKey) {
3664 wpa_group_setkeys(wpa_auth, group);
3665 } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
3666 if (group->GKeyDoneStations == 0)
3667 wpa_group_setkeysdone(wpa_auth, group);
3668 else if (group->GTKReKey)
3669 wpa_group_setkeys(wpa_auth, group);
3670 }
3671}
3672
3673
e4a6ea1d 3674static int wpa_sm_step(struct wpa_state_machine *sm)
6fc6879b
JM		 3675{
3676 if (sm == NULL)
e4a6ea1d 3677 return 0;
6fc6879b
JM		 3678
3679 if (sm->in_step_loop) {
3680 /* This should not happen, but if it does, make sure we do not
3681 * end up freeing the state machine too early by exiting the
3682 * recursive call. */
3683 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
e4a6ea1d 3684 return 0;
6fc6879b
JM		 3685 }
3686
3687 sm->in_step_loop = 1;
3688 do {
3689 if (sm->pending_deinit)
3690 break;
3691
3692 sm->changed = FALSE;
3693 sm->wpa_auth->group->changed = FALSE;
3694
3695 SM_STEP_RUN(WPA_PTK);
3696 if (sm->pending_deinit)
3697 break;
3698 SM_STEP_RUN(WPA_PTK_GROUP);
3699 if (sm->pending_deinit)
3700 break;
3701 wpa_group_sm_step(sm->wpa_auth, sm->group);
3702 } while (sm->changed || sm->wpa_auth->group->changed);
3703 sm->in_step_loop = 0;
3704
3705 if (sm->pending_deinit) {
3706 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
3707 "machine deinit for " MACSTR, MAC2STR(sm->addr));
3708 wpa_free_sta_sm(sm);
e4a6ea1d 3709 return 1;
6fc6879b 3710 }
e4a6ea1d 3711 return 0;
6fc6879b
JM		 3712}
3713
3714
3715static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
3716{
3717 struct wpa_state_machine *sm = eloop_ctx;
3718 wpa_sm_step(sm);
3719}
3720
3721
3722void wpa_auth_sm_notify(struct wpa_state_machine *sm)
3723{
3724 if (sm == NULL)
3725 return;
3726 eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
3727}
3728
3729
3730void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
3731{
3732 int tmp, i;
3733 struct wpa_group *group;
3734
3735 if (wpa_auth == NULL)
3736 return;
3737
3738 group = wpa_auth->group;
3739
3740 for (i = 0; i < 2; i++) {
3741 tmp = group->GM;
3742 group->GM = group->GN;
3743 group->GN = tmp;
3744#ifdef CONFIG_IEEE80211W
3745 tmp = group->GM_igtk;
3746 group->GM_igtk = group->GN_igtk;
3747 group->GN_igtk = tmp;
3748#endif /* CONFIG_IEEE80211W */
3749 wpa_gtk_update(wpa_auth, group);
9354e594 3750 wpa_group_config_group_keys(wpa_auth, group);
6fc6879b
JM		 3751 }
3752}
3753
3754
a6da824b 3755static const char * wpa_bool_txt(int val)
6fc6879b 3756{
a6da824b 3757 return val ? "TRUE" : "FALSE";
6fc6879b
JM		 3758}
3759
3760
6fc6879b
JM		 3761#define RSN_SUITE "%02x-%02x-%02x-%d"
3762#define RSN_SUITE_ARG(s) \
3763((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
3764
3765int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
3766{
3767 int len = 0, ret;
3768 char pmkid_txt[PMKID_LEN * 2 + 1];
8ce58ceb
IH		 3769#ifdef CONFIG_RSN_PREAUTH
3770 const int preauth = 1;
3771#else /* CONFIG_RSN_PREAUTH */
3772 const int preauth = 0;
3773#endif /* CONFIG_RSN_PREAUTH */
6fc6879b
JM		 3774
3775 if (wpa_auth == NULL)
3776 return len;
3777
3778 ret = os_snprintf(buf + len, buflen - len,
3779 "dot11RSNAOptionImplemented=TRUE\n"
8ce58ceb 3780 "dot11RSNAPreauthenticationImplemented=%s\n"
6fc6879b
JM		 3781 "dot11RSNAEnabled=%s\n"
3782 "dot11RSNAPreauthenticationEnabled=%s\n",
8ce58ceb 3783 wpa_bool_txt(preauth),
6fc6879b
JM		 3784 wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3785 wpa_bool_txt(wpa_auth->conf.rsn_preauth));
d85e1fc8 3786 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3787 return len;
3788 len += ret;
3789
3790 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3791 wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3792
3793 ret = os_snprintf(
3794 buf + len, buflen - len,
3795 "dot11RSNAConfigVersion=%u\n"
3796 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3797 /* FIX: dot11RSNAConfigGroupCipher */
3798 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3799 /* FIX: dot11RSNAConfigGroupRekeyTime */
3800 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3801 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3802 "dot11RSNAConfigGroupUpdateCount=%u\n"
3803 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3804 "dot11RSNAConfigGroupCipherSize=%u\n"
3805 "dot11RSNAConfigPMKLifetime=%u\n"
3806 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3807 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3808 "dot11RSNAConfigSATimeout=%u\n"
3809 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3810 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3811 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3812 "dot11RSNAPMKIDUsed=%s\n"
3813 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3814 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3815 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3816 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3817 "dot11RSNA4WayHandshakeFailures=%u\n"
3818 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3819 RSN_VERSION,
3820 !!wpa_auth->conf.wpa_strict_rekey,
41f140d3
GK		 3821 wpa_auth->conf.wpa_group_update_count,
3822 wpa_auth->conf.wpa_pairwise_update_count,
c3550295 3823 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
6fc6879b
JM		 3824 dot11RSNAConfigPMKLifetime,
3825 dot11RSNAConfigPMKReauthThreshold,
3826 dot11RSNAConfigSATimeout,
3827 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3828 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3829 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3830 pmkid_txt,
3831 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3832 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3833 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3834 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3835 wpa_auth->dot11RSNA4WayHandshakeFailures);
d85e1fc8 3836 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3837 return len;
3838 len += ret;
3839
3840 /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3841 /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3842
3843 /* Private MIB */
3844 ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3845 wpa_auth->group->wpa_group_state);
d85e1fc8 3846 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3847 return len;
3848 len += ret;
3849
3850 return len;
3851}
3852
3853
3854int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3855{
3856 int len = 0, ret;
3857 u32 pairwise = 0;
3858
3859 if (sm == NULL)
3860 return 0;
3861
3862 /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3863
3864 /* dot11RSNAStatsEntry */
3865
c3550295
JM		 3866 pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3867 WPA_PROTO_RSN : WPA_PROTO_WPA,
3868 sm->pairwise);
3869 if (pairwise == 0)
6fc6879b
JM		 3870 return 0;
3871
3872 ret = os_snprintf(
3873 buf + len, buflen - len,
3874 /* TODO: dot11RSNAStatsIndex */
3875 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3876 "dot11RSNAStatsVersion=1\n"
3877 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3878 /* TODO: dot11RSNAStatsTKIPICVErrors */
3879 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
d9040cdb 3880 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
6fc6879b
JM		 3881 /* TODO: dot11RSNAStatsCCMPReplays */
3882 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3883 /* TODO: dot11RSNAStatsTKIPReplays */,
3884 MAC2STR(sm->addr),
3885 RSN_SUITE_ARG(pairwise),
3886 sm->dot11RSNAStatsTKIPLocalMICFailures,
3887 sm->dot11RSNAStatsTKIPRemoteMICFailures);
d85e1fc8 3888 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3889 return len;
3890 len += ret;
3891
3892 /* Private MIB */
3893 ret = os_snprintf(buf + len, buflen - len,
3894 "hostapdWPAPTKState=%d\n"
3895 "hostapdWPAPTKGroupState=%d\n",
3896 sm->wpa_ptk_state,
3897 sm->wpa_ptk_group_state);
d85e1fc8 3898 if (os_snprintf_error(buflen - len, ret))
6fc6879b
JM		 3899 return len;
3900 len += ret;
3901
3902 return len;
3903}
3904
3905
3906void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3907{
3908 if (wpa_auth)
3909 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3910}
3911
3912
3913int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3914{
3915 return sm && sm->pairwise_set;
3916}
3917
3918
ff36ff00
JM		 3919int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3920{
3921 return sm->pairwise;
3922}
3923
3924
6fc6879b
JM		 3925int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3926{
3927 if (sm == NULL)
3928 return -1;
3929 return sm->wpa_key_mgmt;
3930}
3931
3932
3933int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3934{
3935 if (sm == NULL)
3936 return 0;
3937 return sm->wpa;
3938}
3939
3940
0e3bd7ac
MV		 3941int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
3942{
3943 if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
3944 return 0;
3945 return sm->tk_already_set;
3946}
3947
3948
2f1357fb
JM		 3949int wpa_auth_sta_fils_tk_already_set(struct wpa_state_machine *sm)
3950{
3951 if (!sm || !wpa_key_mgmt_fils(sm->wpa_key_mgmt))
3952 return 0;
3953 return sm->tk_already_set;
3954}
3955
3956
6fc6879b
JM		 3957int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3958 struct rsn_pmksa_cache_entry *entry)
3959{
3960 if (sm == NULL || sm->pmksa != entry)
3961 return -1;
3962 sm->pmksa = NULL;
3963 return 0;
3964}
3965
3966
3967struct rsn_pmksa_cache_entry *
3968wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3969{
3970 return sm ? sm->pmksa : NULL;
3971}
3972
3973
3974void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3975{
3976 if (sm)
3977 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3978}
3979
3980
3981const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3982{
3983 if (wpa_auth == NULL)
3984 return NULL;
3985 *len = wpa_auth->wpa_ie_len;
3986 return wpa_auth->wpa_ie;
3987}
3988
3989
3990int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
207976f0 3991 unsigned int pmk_len,
6fc6879b
JM		 3992 int session_timeout, struct eapol_state_machine *eapol)
3993{
cb465555
JM		 3994 if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3995 sm->wpa_auth->conf.disable_pmksa_caching)
6fc6879b
JM		 3996 return -1;
3997
834c5d68 3998 if (wpa_key_mgmt_sha384(sm->wpa_key_mgmt)) {
207976f0
JM		 3999 if (pmk_len > PMK_LEN_SUITE_B_192)
4000 pmk_len = PMK_LEN_SUITE_B_192;
4001 } else if (pmk_len > PMK_LEN) {
4002 pmk_len = PMK_LEN;
4003 }
4004
70c93963 4005 if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, pmk_len, NULL,
98cd3d1c 4006 sm->PTK.kck, sm->PTK.kck_len,
4bb081f1
JM		 4007 sm->wpa_auth->addr, sm->addr, session_timeout,
4008 eapol, sm->wpa_key_mgmt))
6fc6879b
JM		 4009 return 0;
4010
4011 return -1;
4012}
4013
4014
4015int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
4016 const u8 *pmk, size_t len, const u8 *sta_addr,
4017 int session_timeout,
4018 struct eapol_state_machine *eapol)
4019{
4020 if (wpa_auth == NULL)
4021 return -1;
4022
70c93963 4023 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, NULL,
087a1f4e
JM		 4024 NULL, 0,
4025 wpa_auth->addr,
4bb081f1
JM		 4026 sta_addr, session_timeout, eapol,
4027 WPA_KEY_MGMT_IEEE8021X))
6fc6879b
JM		 4028 return 0;
4029
4030 return -1;
4031}
4032
4033
f2991170 4034int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
70c93963 4035 const u8 *pmk, const u8 *pmkid)
f2991170
JM		 4036{
4037 if (wpa_auth->conf.disable_pmksa_caching)
4038 return -1;
4039
70c93963 4040 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN, pmkid,
087a1f4e 4041 NULL, 0,
f2991170
JM		 4042 wpa_auth->addr, addr, 0, NULL,
4043 WPA_KEY_MGMT_SAE))
4044 return 0;
4045
4046 return -1;
4047}
4048
4049
0c52953b
JM		 4050int wpa_auth_pmksa_add2(struct wpa_authenticator *wpa_auth, const u8 *addr,
4051 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
4052 int session_timeout, int akmp)
4053{
4054 if (wpa_auth->conf.disable_pmksa_caching)
4055 return -1;
4056
4057 if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, pmk_len, pmkid,
4058 NULL, 0, wpa_auth->addr, addr, session_timeout,
4059 NULL, akmp))
4060 return 0;
4061
4062 return -1;
4063}
4064
4065
901d1fe1
JM		 4066void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
4067 const u8 *sta_addr)
4068{
4069 struct rsn_pmksa_cache_entry *pmksa;
4070
4071 if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
4072 return;
4073 pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
4074 if (pmksa) {
4075 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
4076 MACSTR " based on request", MAC2STR(sta_addr));
4077 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
4078 }
4079}
4080
4081
b8daac18
MH		 4082int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
4083 size_t len)
4084{
4085 if (!wpa_auth || !wpa_auth->pmksa)
4086 return 0;
4087 return pmksa_cache_auth_list(wpa_auth->pmksa, buf, len);
4088}
4089
4090
4c522c77
MH		 4091void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth)
4092{
4093 if (wpa_auth && wpa_auth->pmksa)
4094 pmksa_cache_auth_flush(wpa_auth->pmksa);
4095}
4096
4097
4d77d80e
MH		 4098#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
4099#ifdef CONFIG_MESH
4100
4101int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
4102 char *buf, size_t len)
4103{
4104 if (!wpa_auth || !wpa_auth->pmksa)
4105 return 0;
4106
4107 return pmksa_cache_auth_list_mesh(wpa_auth->pmksa, addr, buf, len);
4108}
4109
4110
4111struct rsn_pmksa_cache_entry *
4112wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
4113 const u8 *pmkid, int expiration)
4114{
4115 struct rsn_pmksa_cache_entry *entry;
4116 struct os_reltime now;
4117
4118 entry = pmksa_cache_auth_create_entry(pmk, PMK_LEN, pmkid, NULL, 0, aa,
4119 spa, 0, NULL, WPA_KEY_MGMT_SAE);
4120 if (!entry)
4121 return NULL;
4122
4123 os_get_reltime(&now);
4124 entry->expiration = now.sec + expiration;
4125 return entry;
4126}
4127
4128
4129int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
4130 struct rsn_pmksa_cache_entry *entry)
4131{
4132 int ret;
4133
4134 if (!wpa_auth || !wpa_auth->pmksa)
4135 return -1;
4136
4137 ret = pmksa_cache_auth_add_entry(wpa_auth->pmksa, entry);
4138 if (ret < 0)
4139 wpa_printf(MSG_DEBUG,
4140 "RSN: Failed to store external PMKSA cache for "
4141 MACSTR, MAC2STR(entry->spa));
4142
4143 return ret;
4144}
4145
4146#endif /* CONFIG_MESH */
4147#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
4148
4149
9f2cf23e 4150struct rsn_pmksa_cache_entry *
c1bd4bac
JM		 4151wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
4152 const u8 *pmkid)
9f2cf23e
MH		 4153{
4154 if (!wpa_auth || !wpa_auth->pmksa)
4155 return NULL;
c1bd4bac 4156 return pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, pmkid);
9f2cf23e
MH		 4157}
4158
4159
4160void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
4161 struct wpa_state_machine *sm,
4162 struct wpa_authenticator *wpa_auth,
4163 u8 *pmkid, u8 *pmk)
4164{
4165 if (!sm)
4166 return;
4167
4168 sm->pmksa = pmksa;
8854f90b
JM		 4169 os_memcpy(pmk, pmksa->pmk, PMK_LEN);
4170 os_memcpy(pmkid, pmksa->pmkid, PMKID_LEN);
4171 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmksa->pmkid, PMKID_LEN);
9f2cf23e
MH		 4172}
4173
4174
a0ad9e8c
MB		 4175/*
4176 * Remove and free the group from wpa_authenticator. This is triggered by a
4177 * callback to make sure nobody is currently iterating the group list while it
4178 * gets modified.
4179 */
4180static void wpa_group_free(struct wpa_authenticator *wpa_auth,
4181 struct wpa_group *group)
4182{
4183 struct wpa_group *prev = wpa_auth->group;
4184
4185 wpa_printf(MSG_DEBUG, "WPA: Remove group state machine for VLAN-ID %d",
4186 group->vlan_id);
4187
4188 while (prev) {
4189 if (prev->next == group) {
4190 /* This never frees the special first group as needed */
4191 prev->next = group->next;
4192 os_free(group);
4193 break;
4194 }
4195 prev = prev->next;
4196 }
4197
4198}
4199
4200
4201/* Increase the reference counter for group */
4202static void wpa_group_get(struct wpa_authenticator *wpa_auth,
4203 struct wpa_group *group)
4204{
4205 /* Skip the special first group */
4206 if (wpa_auth->group == group)
4207 return;
4208
4209 group->references++;
4210}
4211
4212
4213/* Decrease the reference counter and maybe free the group */
4214static void wpa_group_put(struct wpa_authenticator *wpa_auth,
4215 struct wpa_group *group)
4216{
4217 /* Skip the special first group */
4218 if (wpa_auth->group == group)
4219 return;
4220
4221 group->references--;
4222 if (group->references)
4223 return;
4224 wpa_group_free(wpa_auth, group);
4225}
4226
4227
4228/*
4229 * Add a group that has its references counter set to zero. Caller needs to
4230 * call wpa_group_get() on the return value to mark the entry in use.
4231 */
6fc6879b
JM		 4232static struct wpa_group *
4233wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4234{
4235 struct wpa_group *group;
4236
4237 if (wpa_auth == NULL || wpa_auth->group == NULL)
4238 return NULL;
4239
4240 wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
4241 vlan_id);
bdffdc5d 4242 group = wpa_group_init(wpa_auth, vlan_id, 0);
6fc6879b
JM		 4243 if (group == NULL)
4244 return NULL;
4245
4246 group->next = wpa_auth->group->next;
4247 wpa_auth->group->next = group;
4248
4249 return group;
4250}
4251
4252
7cebc8e2
MB		 4253/*
4254 * Enforce that the group state machine for the VLAN is running, increase
4255 * reference counter as interface is up. References might have been increased
4256 * even if a negative value is returned.
4257 * Returns: -1 on error (group missing, group already failed); otherwise, 0
4258 */
4259int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4260{
4261 struct wpa_group *group;
4262
4263 if (wpa_auth == NULL)
4264 return 0;
4265
4266 group = wpa_auth->group;
4267 while (group) {
4268 if (group->vlan_id == vlan_id)
4269 break;
4270 group = group->next;
4271 }
4272
4273 if (group == NULL) {
4274 group = wpa_auth_add_group(wpa_auth, vlan_id);
4275 if (group == NULL)
4276 return -1;
4277 }
4278
4279 wpa_printf(MSG_DEBUG,
4280 "WPA: Ensure group state machine running for VLAN ID %d",
4281 vlan_id);
4282
4283 wpa_group_get(wpa_auth, group);
4284 group->num_setup_iface++;
4285
4286 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4287 return -1;
4288
4289 return 0;
4290}
4291
4292
4293/*
4294 * Decrease reference counter, expected to be zero afterwards.
4295 * returns: -1 on error (group not found, group in fail state)
4296 * -2 if wpa_group is still referenced
4297 * 0 else
4298 */
4299int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id)
4300{
4301 struct wpa_group *group;
4302 int ret = 0;
4303
4304 if (wpa_auth == NULL)
4305 return 0;
4306
4307 group = wpa_auth->group;
4308 while (group) {
4309 if (group->vlan_id == vlan_id)
4310 break;
4311 group = group->next;
4312 }
4313
4314 if (group == NULL)
4315 return -1;
4316
4317 wpa_printf(MSG_DEBUG,
4318 "WPA: Try stopping group state machine for VLAN ID %d",
4319 vlan_id);
4320
4321 if (group->num_setup_iface <= 0) {
4322 wpa_printf(MSG_ERROR,
4323 "WPA: wpa_auth_release_group called more often than wpa_auth_ensure_group for VLAN ID %d, skipping.",
4324 vlan_id);
4325 return -1;
4326 }
4327 group->num_setup_iface--;
4328
4329 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4330 ret = -1;
4331
4332 if (group->references > 1) {
4333 wpa_printf(MSG_DEBUG,
4334 "WPA: Cannot stop group state machine for VLAN ID %d as references are still hold",
4335 vlan_id);
4336 ret = -2;
4337 }
4338
4339 wpa_group_put(wpa_auth, group);
4340
4341 return ret;
4342}
4343
4344
6fc6879b
JM		 4345int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
4346{
4347 struct wpa_group *group;
4348
4349 if (sm == NULL || sm->wpa_auth == NULL)
4350 return 0;
4351
4352 group = sm->wpa_auth->group;
4353 while (group) {
4354 if (group->vlan_id == vlan_id)
4355 break;
4356 group = group->next;
4357 }
4358
4359 if (group == NULL) {
4360 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
4361 if (group == NULL)
4362 return -1;
4363 }
4364
4365 if (sm->group == group)
4366 return 0;
4367
7d7f7be2
JM		 4368 if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
4369 return -1;
4370
6fc6879b
JM		 4371 wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
4372 "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
4373
a0ad9e8c
MB		 4374 wpa_group_get(sm->wpa_auth, group);
4375 wpa_group_put(sm->wpa_auth, sm->group);
6fc6879b 4376 sm->group = group;
a0ad9e8c 4377
6fc6879b
JM		 4378 return 0;
4379}
e4bf4db9
JM		 4380
4381
4382void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
4383 struct wpa_state_machine *sm, int ack)
4384{
4385 if (wpa_auth == NULL || sm == NULL)
4386 return;
4387 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
4388 " ack=%d", MAC2STR(sm->addr), ack);
4389 if (sm->pending_1_of_4_timeout && ack) {
4390 /*
4391 * Some deployed supplicant implementations update their SNonce
4392 * for each EAPOL-Key 2/4 message even within the same 4-way
4393 * handshake and then fail to use the first SNonce when
4394 * deriving the PTK. This results in unsuccessful 4-way
4395 * handshake whenever the relatively short initial timeout is
4396 * reached and EAPOL-Key 1/4 is retransmitted. Try to work
4397 * around this by increasing the timeout now that we know that
4398 * the station has received the frame.
4399 */
4400 int timeout_ms = eapol_key_timeout_subseq;
4401 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
4402 "timeout by %u ms because of acknowledged frame",
4403 timeout_ms);
4404 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
4405 eloop_register_timeout(timeout_ms / 1000,
4406 (timeout_ms % 1000) * 1000,
4407 wpa_send_eapol_timeout, wpa_auth, sm);
4408 }
4409}
c10347f2
JM		 4410
4411
4412int wpa_auth_uses_sae(struct wpa_state_machine *sm)
4413{
4414 if (sm == NULL)
4415 return 0;
4416 return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
4417}
aa189ac9
JM		 4418
4419
4420int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
4421{
4422 if (sm == NULL)
4423 return 0;
4424 return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
4425}
25ef8529
JM		 4426
4427
4428#ifdef CONFIG_P2P
4429int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
4430{
4431 if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
4432 return -1;
4433 os_memcpy(addr, sm->ip_addr, 4);
4434 return 0;
4435}
4436#endif /* CONFIG_P2P */
cbc210de
JM		 4437
4438
4439int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
4440 struct radius_das_attrs *attr)
4441{
4442 return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
4443}
34782730
JM		 4444
4445
4446void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
4447{
4448 struct wpa_group *group;
4449
4450 if (!wpa_auth)
4451 return;
4452 for (group = wpa_auth->group; group; group = group->next)
4453 wpa_group_config_group_keys(wpa_auth, group);
4454}
7eace378
JM		 4455
4456
4457#ifdef CONFIG_FILS
4458
4459struct wpa_auth_fils_iter_data {
4460 struct wpa_authenticator *auth;
4461 const u8 *cache_id;
4462 struct rsn_pmksa_cache_entry *pmksa;
4463 const u8 *spa;
4464 const u8 *pmkid;
4465};
4466
4467
4468static int wpa_auth_fils_iter(struct wpa_authenticator *a, void *ctx)
4469{
4470 struct wpa_auth_fils_iter_data *data = ctx;
4471
4cc6574d 4472 if (a == data->auth || !a->conf.fils_cache_id_set ||
7eace378
JM		 4473 os_memcmp(a->conf.fils_cache_id, data->cache_id,
4474 FILS_CACHE_ID_LEN) != 0)
4475 return 0;
4476 data->pmksa = pmksa_cache_auth_get(a->pmksa, data->spa, data->pmkid);
4477 return data->pmksa != NULL;
4478}
4479
4480
4481struct rsn_pmksa_cache_entry *
4482wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
4483 const u8 *sta_addr, const u8 *pmkid)
4484{
4485 struct wpa_auth_fils_iter_data idata;
4486
4487 if (!wpa_auth->conf.fils_cache_id_set)
4488 return NULL;
4489 idata.auth = wpa_auth;
4490 idata.cache_id = wpa_auth->conf.fils_cache_id;
4491 idata.pmksa = NULL;
4492 idata.spa = sta_addr;
4493 idata.pmkid = pmkid;
4494 wpa_auth_for_each_auth(wpa_auth, wpa_auth_fils_iter, &idata);
4495 return idata.pmksa;
4496}
4497
5db997e3
JM		 4498
4499#ifdef CONFIG_IEEE80211R_AP
4500int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, u8 *buf, size_t len)
4501{
4502 struct wpa_auth_config *conf = &wpa_auth->conf;
4503
4504 return wpa_write_ftie(conf, conf->r0_key_holder,
4505 conf->r0_key_holder_len,
4506 NULL, NULL, buf, len, NULL, 0);
4507}
4508#endif /* CONFIG_IEEE80211R_AP */
4509
8acbf85f
JM		 4510
4511void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
4512 u8 *fils_anonce, u8 *fils_snonce,
4513 u8 *fils_kek, size_t *fils_kek_len)
4514{
4515 os_memcpy(fils_anonce, sm->ANonce, WPA_NONCE_LEN);
4516 os_memcpy(fils_snonce, sm->SNonce, WPA_NONCE_LEN);
4517 os_memcpy(fils_kek, sm->PTK.kek, WPA_KEK_MAX_LEN);
4518 *fils_kek_len = sm->PTK.kek_len;
4519}
4520
7eace378 4521#endif /* CONFIG_FILS */
6bc2f00f
JM		 4522
4523
4524#if CONFIG_TESTING_OPTIONS
d8afdb21
JM		 4525
4526int wpa_auth_resend_m1(struct wpa_state_machine *sm, int change_anonce)
4527{
4528 const u8 *anonce = sm->ANonce;
4529 u8 anonce_buf[WPA_NONCE_LEN];
4530
4531 if (change_anonce) {
4532 if (random_get_bytes(anonce_buf, WPA_NONCE_LEN))
4533 return -1;
4534 anonce = anonce_buf;
4535 }
4536
4537 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4538 "sending 1/4 msg of 4-Way Handshake (TESTING)");
4539 wpa_send_eapol(sm->wpa_auth, sm,
4540 WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
4541 anonce, NULL, 0, 0, 0);
4542 return 0;
4543}
4544
4545
4546int wpa_auth_resend_m3(struct wpa_state_machine *sm)
4547{
4548 u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, *opos;
4549 size_t gtk_len, kde_len;
4550 struct wpa_group *gsm = sm->group;
4551 u8 *wpa_ie;
4552 int wpa_ie_len, secure, keyidx, encr = 0;
4553
4554 /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
4555 GTK[GN], IGTK, [FTIE], [TIE * 2])
4556 */
4557
4558 /* Use 0 RSC */
4559 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4560 /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
4561 wpa_ie = sm->wpa_auth->wpa_ie;
4562 wpa_ie_len = sm->wpa_auth->wpa_ie_len;
4563 if (sm->wpa == WPA_VERSION_WPA &&
4564 (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
4565 wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
4566 /* WPA-only STA, remove RSN IE and possible MDIE */
4567 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4568 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
4569 wpa_ie = wpa_ie + wpa_ie[1] + 2;
4570 wpa_ie_len = wpa_ie[1] + 2;
4571 }
4572 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4573 "sending 3/4 msg of 4-Way Handshake (TESTING)");
4574 if (sm->wpa == WPA_VERSION_WPA2) {
4575 /* WPA2 send GTK in the 4-way handshake */
4576 secure = 1;
4577 gtk = gsm->GTK[gsm->GN - 1];
4578 gtk_len = gsm->GTK_len;
4579 keyidx = gsm->GN;
4580 _rsc = rsc;
4581 encr = 1;
4582 } else {
4583 /* WPA does not include GTK in msg 3/4 */
4584 secure = 0;
4585 gtk = NULL;
4586 gtk_len = 0;
4587 keyidx = 0;
4588 _rsc = NULL;
4589 if (sm->rx_eapol_key_secure) {
4590 /*
4591 * It looks like Windows 7 supplicant tries to use
4592 * Secure bit in msg 2/4 after having reported Michael
4593 * MIC failure and it then rejects the 4-way handshake
4594 * if msg 3/4 does not set Secure bit. Work around this
4595 * by setting the Secure bit here even in the case of
4596 * WPA if the supplicant used it first.
4597 */
4598 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4599 "STA used Secure bit in WPA msg 2/4 - "
4600 "set Secure for 3/4 as workaround");
4601 secure = 1;
4602 }
4603 }
4604
4605 kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
4606 if (gtk)
4607 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
4608#ifdef CONFIG_IEEE80211R_AP
4609 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4610 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
4611 kde_len += 300; /* FTIE + 2 * TIE */
4612 }
4613#endif /* CONFIG_IEEE80211R_AP */
4614 kde = os_malloc(kde_len);
4615 if (kde == NULL)
4616 return -1;
4617
4618 pos = kde;
4619 os_memcpy(pos, wpa_ie, wpa_ie_len);
4620 pos += wpa_ie_len;
4621#ifdef CONFIG_IEEE80211R_AP
4622 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4623 int res;
4624 size_t elen;
4625
4626 elen = pos - kde;
4627 res = wpa_insert_pmkid(kde, &elen, sm->pmk_r1_name);
4628 if (res < 0) {
4629 wpa_printf(MSG_ERROR, "FT: Failed to insert "
4630 "PMKR1Name into RSN IE in EAPOL-Key data");
4631 os_free(kde);
4632 return -1;
4633 }
4634 pos -= wpa_ie_len;
4635 pos += elen;
4636 }
4637#endif /* CONFIG_IEEE80211R_AP */
4638 if (gtk) {
4639 u8 hdr[2];
4640 hdr[0] = keyidx & 0x03;
4641 hdr[1] = 0;
4642 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
4643 gtk, gtk_len);
4644 }
4645 opos = pos;
4646 pos = ieee80211w_kde_add(sm, pos);
4647 if (pos - opos >= WPA_IGTK_KDE_PREFIX_LEN) {
4648 opos += 2; /* skip keyid */
4649 os_memset(opos, 0, 6); /* clear PN */
4650 }
4651
4652#ifdef CONFIG_IEEE80211R_AP
4653 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
4654 int res;
4655 struct wpa_auth_config *conf;
4656
4657 conf = &sm->wpa_auth->conf;
4658 if (sm->assoc_resp_ftie &&
4659 kde + kde_len - pos >= 2 + sm->assoc_resp_ftie[1]) {
4660 os_memcpy(pos, sm->assoc_resp_ftie,
4661 2 + sm->assoc_resp_ftie[1]);
4662 res = 2 + sm->assoc_resp_ftie[1];
4663 } else {
4664 res = wpa_write_ftie(conf, conf->r0_key_holder,
4665 conf->r0_key_holder_len,
4666 NULL, NULL, pos,
4667 kde + kde_len - pos,
4668 NULL, 0);
4669 }
4670 if (res < 0) {
4671 wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
4672 "into EAPOL-Key Key Data");
4673 os_free(kde);
4674 return -1;
4675 }
4676 pos += res;
4677
4678 /* TIE[ReassociationDeadline] (TU) */
4679 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
4680 *pos++ = 5;
4681 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
4682 WPA_PUT_LE32(pos, conf->reassociation_deadline);
4683 pos += 4;
4684
4685 /* TIE[KeyLifetime] (seconds) */
4686 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
4687 *pos++ = 5;
4688 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
4689 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
4690 pos += 4;
4691 }
4692#endif /* CONFIG_IEEE80211R_AP */
4693
4694 wpa_send_eapol(sm->wpa_auth, sm,
4695 (secure ? WPA_KEY_INFO_SECURE : 0) |
4696 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
4697 WPA_KEY_INFO_MIC : 0) |
4698 WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
4699 WPA_KEY_INFO_KEY_TYPE,
4700 _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
4701 os_free(kde);
4702 return 0;
4703}
4704
4705
6bc2f00f
JM		 4706int wpa_auth_resend_group_m1(struct wpa_state_machine *sm)
4707{
4708 u8 rsc[WPA_KEY_RSC_LEN];
4709 struct wpa_group *gsm = sm->group;
4710 const u8 *kde;
4711 u8 *kde_buf = NULL, *pos, *opos, hdr[2];
4712 size_t kde_len;
4713 u8 *gtk;
4714
4715 /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
4716 os_memset(rsc, 0, WPA_KEY_RSC_LEN);
4717 /* Use 0 RSC */
4718 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
4719 "sending 1/2 msg of Group Key Handshake (TESTING)");
4720
4721 gtk = gsm->GTK[gsm->GN - 1];
4722 if (sm->wpa == WPA_VERSION_WPA2) {
4723 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
4724 ieee80211w_kde_len(sm);
4725 kde_buf = os_malloc(kde_len);
4726 if (kde_buf == NULL)
4727 return -1;
4728
4729 kde = pos = kde_buf;
4730 hdr[0] = gsm->GN & 0x03;
4731 hdr[1] = 0;
4732 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
4733 gtk, gsm->GTK_len);
4734 opos = pos;
4735 pos = ieee80211w_kde_add(sm, pos);
4736 if (pos - opos >= WPA_IGTK_KDE_PREFIX_LEN) {
4737 opos += 2; /* skip keyid */
4738 os_memset(opos, 0, 6); /* clear PN */
4739 }
4740 kde_len = pos - kde;
4741 } else {
4742 kde = gtk;
4743 kde_len = gsm->GTK_len;
4744 }
4745
4746 wpa_send_eapol(sm->wpa_auth, sm,
4747 WPA_KEY_INFO_SECURE |
4748 (wpa_mic_len(sm->wpa_key_mgmt, sm->pmk_len) ?
4749 WPA_KEY_INFO_MIC : 0) |
4750 WPA_KEY_INFO_ACK |
4751 (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
4752 rsc, NULL, kde, kde_len, gsm->GN, 1);
4753
4754 os_free(kde_buf);
4755 return 0;
4756}
d8afdb21 4757
6bc2f00f 4758#endif /* CONFIG_TESTING_OPTIONS */
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