contrib/hostapd/hostapd/wpa.c

   1 /*
   2  * hostapd - IEEE 802.11i-2004 / WPA Authenticator
   3  * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #ifndef CONFIG_NATIVE_WINDOWS
  18
  19 #include "common.h"
  20 #include "config.h"
  21 #include "eapol_sm.h"
  22 #include "wpa.h"
  23 #include "sha1.h"
  24 #include "sha256.h"
  25 #include "rc4.h"
  26 #include "aes_wrap.h"
  27 #include "crypto.h"
  28 #include "eloop.h"
  29 #include "ieee802_11.h"
  30 #include "pmksa_cache.h"
  31 #include "state_machine.h"
  32 #include "wpa_auth_i.h"
  33 #include "wpa_auth_ie.h"
  34
  35 #define STATE_MACHINE_DATA struct wpa_state_machine
  36 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
  37 #define STATE_MACHINE_ADDR sm->addr
  38
  39
  40 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
  41 static void wpa_sm_step(struct wpa_state_machine *sm);
  42 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len);
  43 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
  44 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
  45                               struct wpa_group *group);
  46 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
  47 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
  48                           struct wpa_group *group);
  49
  50 static const u32 dot11RSNAConfigGroupUpdateCount = 4;
  51 static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
  52 static const u32 eapol_key_timeout_first = 100; /* ms */
  53 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
  54
  55 /* TODO: make these configurable */
  56 static const int dot11RSNAConfigPMKLifetime = 43200;
  57 static const int dot11RSNAConfigPMKReauthThreshold = 70;
  58 static const int dot11RSNAConfigSATimeout = 60;
  59
  60
  61 static inline void wpa_auth_mic_failure_report(
  62         struct wpa_authenticator *wpa_auth, const u8 *addr)
  63 {
  64         if (wpa_auth->cb.mic_failure_report)
  65                 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
  66 }
  67
  68
  69 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
  70                                       const u8 *addr, wpa_eapol_variable var,
  71                                       int value)
  72 {
  73         if (wpa_auth->cb.set_eapol)
  74                 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
  75 }
  76
  77
  78 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
  79                                      const u8 *addr, wpa_eapol_variable var)
  80 {
  81         if (wpa_auth->cb.get_eapol == NULL)
  82                 return -1;
  83         return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
  84 }
  85
  86
  87 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
  88                                           const u8 *addr, const u8 *prev_psk)
  89 {
  90         if (wpa_auth->cb.get_psk == NULL)
  91                 return NULL;
  92         return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
  93 }
  94
  95
  96 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
  97                                    const u8 *addr, u8 *msk, size_t *len)
  98 {
  99         if (wpa_auth->cb.get_msk == NULL)
 100                 return -1;
 101         return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
 102 }
 103
 104
 105 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 106                                    int vlan_id,
 107                                    const char *alg, const u8 *addr, int idx,
 108                                    u8 *key, size_t key_len)
 109 {
 110         if (wpa_auth->cb.set_key == NULL)
 111                 return -1;
 112         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 113                                     key, key_len);
 114 }
 115
 116
 117 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 118                                       const u8 *addr, int idx, u8 *seq)
 119 {
 120         if (wpa_auth->cb.get_seqnum == NULL)
 121                 return -1;
 122         return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
 123 }
 124
 125
 126 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
 127                                            const u8 *addr, int idx, u8 *seq)
 128 {
 129         if (wpa_auth->cb.get_seqnum_igtk == NULL)
 130                 return -1;
 131         return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
 132 }
 133
 134
 135 static inline int
 136 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
 137                     const u8 *data, size_t data_len, int encrypt)
 138 {
 139         if (wpa_auth->cb.send_eapol == NULL)
 140                 return -1;
 141         return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
 142                                        encrypt);
 143 }
 144
 145
 146 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
 147                           int (*cb)(struct wpa_state_machine *sm, void *ctx),
 148                           void *cb_ctx)
 149 {
 150         if (wpa_auth->cb.for_each_sta == NULL)
 151                 return 0;
 152         return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
 153 }
 154
 155
 156 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
 157                            int (*cb)(struct wpa_authenticator *a, void *ctx),
 158                            void *cb_ctx)
 159 {
 160         if (wpa_auth->cb.for_each_auth == NULL)
 161                 return 0;
 162         return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
 163 }
 164
 165
 166 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 167                      logger_level level, const char *txt)
 168 {
 169         if (wpa_auth->cb.logger == NULL)
 170                 return;
 171         wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
 172 }
 173
 174
 175 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 176                       logger_level level, const char *fmt, ...)
 177 {
 178         char *format;
 179         int maxlen;
 180         va_list ap;
 181
 182         if (wpa_auth->cb.logger == NULL)
 183                 return;
 184
 185         maxlen = os_strlen(fmt) + 100;
 186         format = os_malloc(maxlen);
 187         if (!format)
 188                 return;
 189
 190         va_start(ap, fmt);
 191         vsnprintf(format, maxlen, fmt, ap);
 192         va_end(ap);
 193
 194         wpa_auth_logger(wpa_auth, addr, level, format);
 195
 196         os_free(format);
 197 }
 198
 199
 200 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
 201                                const u8 *addr)
 202 {
 203         if (wpa_auth->cb.disconnect == NULL)
 204                 return;
 205         wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
 206                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 207 }
 208
 209
 210 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
 211 {
 212         int ret = 0;
 213 #ifdef CONFIG_IEEE80211R
 214         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
 215                 ret = 1;
 216 #endif /* CONFIG_IEEE80211R */
 217 #ifdef CONFIG_IEEE80211W
 218         if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
 219                 ret = 1;
 220 #endif /* CONFIG_IEEE80211W */
 221         return ret;
 222 }
 223
 224
 225 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
 226 {
 227         struct wpa_authenticator *wpa_auth = eloop_ctx;
 228
 229         if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
 230                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 231                            "initialization.");
 232         } else {
 233                 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
 234         }
 235
 236         if (wpa_auth->conf.wpa_gmk_rekey) {
 237                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 238                                        wpa_rekey_gmk, wpa_auth, NULL);
 239         }
 240 }
 241
 242
 243 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
 244 {
 245         struct wpa_authenticator *wpa_auth = eloop_ctx;
 246         struct wpa_group *group;
 247
 248         wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
 249         for (group = wpa_auth->group; group; group = group->next) {
 250                 group->GTKReKey = TRUE;
 251                 do {
 252                         group->changed = FALSE;
 253                         wpa_group_sm_step(wpa_auth, group);
 254                 } while (group->changed);
 255         }
 256
 257         if (wpa_auth->conf.wpa_group_rekey) {
 258                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
 259                                        0, wpa_rekey_gtk, wpa_auth, NULL);
 260         }
 261 }
 262
 263
 264 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
 265 {
 266         struct wpa_authenticator *wpa_auth = eloop_ctx;
 267         struct wpa_state_machine *sm = timeout_ctx;
 268
 269         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
 270         wpa_request_new_ptk(sm);
 271         wpa_sm_step(sm);
 272 }
 273
 274
 275 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
 276 {
 277         if (sm->pmksa == ctx)
 278                 sm->pmksa = NULL;
 279         return 0;
 280 }
 281
 282
 283 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
 284                                    void *ctx)
 285 {
 286         struct wpa_authenticator *wpa_auth = ctx;
 287         wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
 288 }
 289
 290
 291 static void wpa_group_set_key_len(struct wpa_group *group, int cipher)
 292 {
 293         switch (cipher) {
 294         case WPA_CIPHER_CCMP:
 295                 group->GTK_len = 16;
 296                 break;
 297         case WPA_CIPHER_TKIP:
 298                 group->GTK_len = 32;
 299                 break;
 300         case WPA_CIPHER_WEP104:
 301                 group->GTK_len = 13;
 302                 break;
 303         case WPA_CIPHER_WEP40:
 304                 group->GTK_len = 5;
 305                 break;
 306         }
 307 }
 308
 309
 310 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
 311                                          int vlan_id)
 312 {
 313         struct wpa_group *group;
 314         u8 buf[ETH_ALEN + 8 + sizeof(group)];
 315         u8 rkey[32];
 316
 317         group = os_zalloc(sizeof(struct wpa_group));
 318         if (group == NULL)
 319                 return NULL;
 320
 321         group->GTKAuthenticator = TRUE;
 322         group->vlan_id = vlan_id;
 323
 324         wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
 325
 326         /* Counter = PRF-256(Random number, "Init Counter",
 327          *                   Local MAC Address || Time)
 328          */
 329         os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
 330         wpa_get_ntp_timestamp(buf + ETH_ALEN);
 331         os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
 332         if (os_get_random(rkey, sizeof(rkey)) ||
 333             os_get_random(group->GMK, WPA_GMK_LEN)) {
 334                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 335                            "initialization.");
 336                 os_free(group);
 337                 return NULL;
 338         }
 339
 340         sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
 341                  group->Counter, WPA_NONCE_LEN);
 342
 343         group->GInit = TRUE;
 344         wpa_group_sm_step(wpa_auth, group);
 345         group->GInit = FALSE;
 346         wpa_group_sm_step(wpa_auth, group);
 347
 348         return group;
 349 }
 350
 351
 352 /**
 353  * wpa_init - Initialize WPA authenticator
 354  * @addr: Authenticator address
 355  * @conf: Configuration for WPA authenticator
 356  * @cb: Callback functions for WPA authenticator
 357  * Returns: Pointer to WPA authenticator data or %NULL on failure
 358  */
 359 struct wpa_authenticator * wpa_init(const u8 *addr,
 360                                     struct wpa_auth_config *conf,
 361                                     struct wpa_auth_callbacks *cb)
 362 {
 363         struct wpa_authenticator *wpa_auth;
 364
 365         wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
 366         if (wpa_auth == NULL)
 367                 return NULL;
 368         os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
 369         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 370         os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
 371
 372         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 373                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 374                 os_free(wpa_auth);
 375                 return NULL;
 376         }
 377
 378         wpa_auth->group = wpa_group_init(wpa_auth, 0);
 379         if (wpa_auth->group == NULL) {
 380                 os_free(wpa_auth->wpa_ie);
 381                 os_free(wpa_auth);
 382                 return NULL;
 383         }
 384
 385         wpa_auth->pmksa = pmksa_cache_init(wpa_auth_pmksa_free_cb, wpa_auth);
 386         if (wpa_auth->pmksa == NULL) {
 387                 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
 388                 os_free(wpa_auth->wpa_ie);
 389                 os_free(wpa_auth);
 390                 return NULL;
 391         }
 392
 393 #ifdef CONFIG_IEEE80211R
 394         wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
 395         if (wpa_auth->ft_pmk_cache == NULL) {
 396                 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
 397                 os_free(wpa_auth->wpa_ie);
 398                 pmksa_cache_deinit(wpa_auth->pmksa);
 399                 os_free(wpa_auth);
 400                 return NULL;
 401         }
 402 #endif /* CONFIG_IEEE80211R */
 403
 404         if (wpa_auth->conf.wpa_gmk_rekey) {
 405                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 406                                        wpa_rekey_gmk, wpa_auth, NULL);
 407         }
 408
 409         if (wpa_auth->conf.wpa_group_rekey) {
 410                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
 411                                        wpa_rekey_gtk, wpa_auth, NULL);
 412         }
 413
 414         return wpa_auth;
 415 }
 416
 417
 418 /**
 419  * wpa_deinit - Deinitialize WPA authenticator
 420  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 421  */
 422 void wpa_deinit(struct wpa_authenticator *wpa_auth)
 423 {
 424         struct wpa_group *group, *prev;
 425
 426         eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
 427         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
 428
 429 #ifdef CONFIG_PEERKEY
 430         while (wpa_auth->stsl_negotiations)
 431                 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
 432 #endif /* CONFIG_PEERKEY */
 433
 434         pmksa_cache_deinit(wpa_auth->pmksa);
 435
 436 #ifdef CONFIG_IEEE80211R
 437         wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
 438         wpa_auth->ft_pmk_cache = NULL;
 439 #endif /* CONFIG_IEEE80211R */
 440
 441         os_free(wpa_auth->wpa_ie);
 442
 443         group = wpa_auth->group;
 444         while (group) {
 445                 prev = group;
 446                 group = group->next;
 447                 os_free(prev);
 448         }
 449
 450         os_free(wpa_auth);
 451 }
 452
 453
 454 /**
 455  * wpa_reconfig - Update WPA authenticator configuration
 456  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 457  * @conf: Configuration for WPA authenticator
 458  */
 459 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
 460                  struct wpa_auth_config *conf)
 461 {
 462         struct wpa_group *group;
 463         if (wpa_auth == NULL)
 464                 return 0;
 465
 466         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 467         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 468                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 469                 return -1;
 470         }
 471
 472         /*
 473          * Reinitialize GTK to make sure it is suitable for the new
 474          * configuration.
 475          */
 476         group = wpa_auth->group;
 477         wpa_group_set_key_len(group, wpa_auth->conf.wpa_group);
 478         group->GInit = TRUE;
 479         wpa_group_sm_step(wpa_auth, group);
 480         group->GInit = FALSE;
 481         wpa_group_sm_step(wpa_auth, group);
 482
 483         return 0;
 484 }
 485
 486
 487 struct wpa_state_machine *
 488 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
 489 {
 490         struct wpa_state_machine *sm;
 491
 492         sm = os_zalloc(sizeof(struct wpa_state_machine));
 493         if (sm == NULL)
 494                 return NULL;
 495         os_memcpy(sm->addr, addr, ETH_ALEN);
 496
 497         sm->wpa_auth = wpa_auth;
 498         sm->group = wpa_auth->group;
 499
 500         return sm;
 501 }
 502
 503
 504 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
 505                              struct wpa_state_machine *sm)
 506 {
 507         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 508                 return;
 509
 510 #ifdef CONFIG_IEEE80211R
 511         if (sm->ft_completed) {
 512                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 513                                 "FT authentication already completed - do not "
 514                                 "start 4-way handshake");
 515                 return;
 516         }
 517 #endif /* CONFIG_IEEE80211R */
 518
 519         if (sm->started) {
 520                 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
 521                 sm->ReAuthenticationRequest = TRUE;
 522                 wpa_sm_step(sm);
 523                 return;
 524         }
 525
 526         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 527                         "start authentication");
 528         sm->started = 1;
 529
 530         sm->Init = TRUE;
 531         wpa_sm_step(sm);
 532         sm->Init = FALSE;
 533         sm->AuthenticationRequest = TRUE;
 534         wpa_sm_step(sm);
 535 }
 536
 537
 538 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
 539 {
 540         /* WPA/RSN was not used - clear WPA state. This is needed if the STA
 541          * reassociates back to the same AP while the previous entry for the
 542          * STA has not yet been removed. */
 543         if (sm == NULL)
 544                 return;
 545
 546         sm->wpa_key_mgmt = 0;
 547 }
 548
 549
 550 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
 551 {
 552         os_free(sm->last_rx_eapol_key);
 553         os_free(sm->wpa_ie);
 554         os_free(sm);
 555 }
 556
 557
 558 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
 559 {
 560         if (sm == NULL)
 561                 return;
 562
 563         if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
 564                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
 565                                 "strict rekeying - force GTK rekey since STA "
 566                                 "is leaving");
 567                 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
 568                 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
 569                                        NULL);
 570         }
 571
 572         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
 573         eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
 574         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
 575         if (sm->in_step_loop) {
 576                 /* Must not free state machine while wpa_sm_step() is running.
 577                  * Freeing will be completed in the end of wpa_sm_step(). */
 578                 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
 579                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
 580                 sm->pending_deinit = 1;
 581         } else
 582                 wpa_free_sta_sm(sm);
 583 }
 584
 585
 586 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
 587 {
 588         if (sm == NULL)
 589                 return;
 590
 591         sm->PTKRequest = TRUE;
 592         sm->PTK_valid = 0;
 593 }
 594
 595
 596 static int wpa_replay_counter_valid(struct wpa_state_machine *sm,
 597                                     const u8 *replay_counter)
 598 {
 599         int i;
 600         for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
 601                 if (!sm->key_replay[i].valid)
 602                         break;
 603                 if (os_memcmp(replay_counter, sm->key_replay[i].counter,
 604                               WPA_REPLAY_COUNTER_LEN) == 0)
 605                         return 1;
 606         }
 607         return 0;
 608 }
 609
 610
 611 void wpa_receive(struct wpa_authenticator *wpa_auth,
 612                  struct wpa_state_machine *sm,
 613                  u8 *data, size_t data_len)
 614 {
 615         struct ieee802_1x_hdr *hdr;
 616         struct wpa_eapol_key *key;
 617         u16 key_info, key_data_length;
 618         enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
 619                SMK_M1, SMK_M3, SMK_ERROR } msg;
 620         char *msgtxt;
 621         struct wpa_eapol_ie_parse kde;
 622
 623         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 624                 return;
 625
 626         if (data_len < sizeof(*hdr) + sizeof(*key))
 627                 return;
 628
 629         hdr = (struct ieee802_1x_hdr *) data;
 630         key = (struct wpa_eapol_key *) (hdr + 1);
 631         key_info = WPA_GET_BE16(key->key_info);
 632         key_data_length = WPA_GET_BE16(key->key_data_length);
 633         if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
 634                 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
 635                            "key_data overflow (%d > %lu)",
 636                            key_data_length,
 637                            (unsigned long) (data_len - sizeof(*hdr) -
 638                                             sizeof(*key)));
 639                 return;
 640         }
 641
 642         if (sm->wpa == WPA_VERSION_WPA2) {
 643                 if (key->type != EAPOL_KEY_TYPE_RSN) {
 644                         wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
 645                                    "unexpected type %d in RSN mode",
 646                                    key->type);
 647                         return;
 648                 }
 649         } else {
 650                 if (key->type != EAPOL_KEY_TYPE_WPA) {
 651                         wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
 652                                    "unexpected type %d in WPA mode",
 653                                    key->type);
 654                         return;
 655                 }
 656         }
 657
 658         /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
 659          * are set */
 660
 661         if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
 662             (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
 663                 if (key_info & WPA_KEY_INFO_ERROR) {
 664                         msg = SMK_ERROR;
 665                         msgtxt = "SMK Error";
 666                 } else {
 667                         msg = SMK_M1;
 668                         msgtxt = "SMK M1";
 669                 }
 670         } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
 671                 msg = SMK_M3;
 672                 msgtxt = "SMK M3";
 673         } else if (key_info & WPA_KEY_INFO_REQUEST) {
 674                 msg = REQUEST;
 675                 msgtxt = "Request";
 676         } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
 677                 msg = GROUP_2;
 678                 msgtxt = "2/2 Group";
 679         } else if (key_data_length == 0) {
 680                 msg = PAIRWISE_4;
 681                 msgtxt = "4/4 Pairwise";
 682         } else {
 683                 msg = PAIRWISE_2;
 684                 msgtxt = "2/4 Pairwise";
 685         }
 686
 687         /* TODO: key_info type validation for PeerKey */
 688         if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
 689             msg == GROUP_2) {
 690                 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
 691                 if (sm->pairwise == WPA_CIPHER_CCMP) {
 692                         if (wpa_use_aes_cmac(sm) &&
 693                             ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
 694                                 wpa_auth_logger(wpa_auth, sm->addr,
 695                                                 LOGGER_WARNING,
 696                                                 "advertised support for "
 697                                                 "AES-128-CMAC, but did not "
 698                                                 "use it");
 699                                 return;
 700                         }
 701
 702                         if (!wpa_use_aes_cmac(sm) &&
 703                             ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
 704                                 wpa_auth_logger(wpa_auth, sm->addr,
 705                                                 LOGGER_WARNING,
 706                                                 "did not use HMAC-SHA1-AES "
 707                                                 "with CCMP");
 708                                 return;
 709                         }
 710                 }
 711         }
 712
 713         if (key_info & WPA_KEY_INFO_REQUEST) {
 714                 if (sm->req_replay_counter_used &&
 715                     os_memcmp(key->replay_counter, sm->req_replay_counter,
 716                               WPA_REPLAY_COUNTER_LEN) <= 0) {
 717                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
 718                                         "received EAPOL-Key request with "
 719                                         "replayed counter");
 720                         return;
 721                 }
 722         }
 723
 724         if (!(key_info & WPA_KEY_INFO_REQUEST) &&
 725             !wpa_replay_counter_valid(sm, key->replay_counter)) {
 726                 int i;
 727                 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 728                                  "received EAPOL-Key %s with unexpected "
 729                                  "replay counter", msgtxt);
 730                 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
 731                         if (!sm->key_replay[i].valid)
 732                                 break;
 733                         wpa_hexdump(MSG_DEBUG, "pending replay counter",
 734                                     sm->key_replay[i].counter,
 735                                     WPA_REPLAY_COUNTER_LEN);
 736                 }
 737                 wpa_hexdump(MSG_DEBUG, "received replay counter",
 738                             key->replay_counter, WPA_REPLAY_COUNTER_LEN);
 739                 return;
 740         }
 741
 742         switch (msg) {
 743         case PAIRWISE_2:
 744                 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
 745                     sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
 746                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 747                                          "received EAPOL-Key msg 2/4 in "
 748                                          "invalid state (%d) - dropped",
 749                                          sm->wpa_ptk_state);
 750                         return;
 751                 }
 752                 if (sm->wpa_ie == NULL ||
 753                     sm->wpa_ie_len != key_data_length ||
 754                     os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
 755                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 756                                         "WPA IE from (Re)AssocReq did not "
 757                                         "match with msg 2/4");
 758                         if (sm->wpa_ie) {
 759                                 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
 760                                             sm->wpa_ie, sm->wpa_ie_len);
 761                         }
 762                         wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
 763                                     (u8 *) (key + 1), key_data_length);
 764                         /* MLME-DEAUTHENTICATE.request */
 765                         wpa_sta_disconnect(wpa_auth, sm->addr);
 766                         return;
 767                 }
 768                 break;
 769         case PAIRWISE_4:
 770                 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
 771                     !sm->PTK_valid) {
 772                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 773                                          "received EAPOL-Key msg 4/4 in "
 774                                          "invalid state (%d) - dropped",
 775                                          sm->wpa_ptk_state);
 776                         return;
 777                 }
 778                 break;
 779         case GROUP_2:
 780                 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
 781                     || !sm->PTK_valid) {
 782                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 783                                          "received EAPOL-Key msg 2/2 in "
 784                                          "invalid state (%d) - dropped",
 785                                          sm->wpa_ptk_group_state);
 786                         return;
 787                 }
 788                 break;
 789 #ifdef CONFIG_PEERKEY
 790         case SMK_M1:
 791         case SMK_M3:
 792         case SMK_ERROR:
 793                 if (!wpa_auth->conf.peerkey) {
 794                         wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
 795                                    "PeerKey use disabled - ignoring message");
 796                         return;
 797                 }
 798                 if (!sm->PTK_valid) {
 799                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 800                                         "received EAPOL-Key msg SMK in "
 801                                         "invalid state - dropped");
 802                         return;
 803                 }
 804                 break;
 805 #else /* CONFIG_PEERKEY */
 806         case SMK_M1:
 807         case SMK_M3:
 808         case SMK_ERROR:
 809                 return; /* STSL disabled - ignore SMK messages */
 810 #endif /* CONFIG_PEERKEY */
 811         case REQUEST:
 812                 break;
 813         }
 814
 815         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
 816                          "received EAPOL-Key frame (%s)", msgtxt);
 817
 818         if (key_info & WPA_KEY_INFO_ACK) {
 819                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 820                                 "received invalid EAPOL-Key: Key Ack set");
 821                 return;
 822         }
 823
 824         if (!(key_info & WPA_KEY_INFO_MIC)) {
 825                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 826                                 "received invalid EAPOL-Key: Key MIC not set");
 827                 return;
 828         }
 829
 830         sm->MICVerified = FALSE;
 831         if (sm->PTK_valid) {
 832                 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
 833                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 834                                         "received EAPOL-Key with invalid MIC");
 835                         return;
 836                 }
 837                 sm->MICVerified = TRUE;
 838                 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
 839         }
 840
 841         if (key_info & WPA_KEY_INFO_REQUEST) {
 842                 if (sm->MICVerified) {
 843                         sm->req_replay_counter_used = 1;
 844                         os_memcpy(sm->req_replay_counter, key->replay_counter,
 845                                   WPA_REPLAY_COUNTER_LEN);
 846                 } else {
 847                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 848                                         "received EAPOL-Key request with "
 849                                         "invalid MIC");
 850                         return;
 851                 }
 852
 853                 /*
 854                  * TODO: should decrypt key data field if encryption was used;
 855                  * even though MAC address KDE is not normally encrypted,
 856                  * supplicant is allowed to encrypt it.
 857                  */
 858                 if (msg == SMK_ERROR) {
 859 #ifdef CONFIG_PEERKEY
 860                         wpa_smk_error(wpa_auth, sm, key);
 861 #endif /* CONFIG_PEERKEY */
 862                         return;
 863                 } else if (key_info & WPA_KEY_INFO_ERROR) {
 864                         /* Supplicant reported a Michael MIC error */
 865                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 866                                         "received EAPOL-Key Error Request "
 867                                         "(STA detected Michael MIC failure)");
 868                         wpa_auth_mic_failure_report(wpa_auth, sm->addr);
 869                         sm->dot11RSNAStatsTKIPRemoteMICFailures++;
 870                         wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
 871                         /* Error report is not a request for a new key
 872                          * handshake, but since Authenticator may do it, let's
 873                          * change the keys now anyway. */
 874                         wpa_request_new_ptk(sm);
 875                 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
 876                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 877                                         "received EAPOL-Key Request for new "
 878                                         "4-Way Handshake");
 879                         wpa_request_new_ptk(sm);
 880 #ifdef CONFIG_PEERKEY
 881                 } else if (msg == SMK_M1) {
 882                         wpa_smk_m1(wpa_auth, sm, key);
 883 #endif /* CONFIG_PEERKEY */
 884                 } else if (key_data_length > 0 &&
 885                            wpa_parse_kde_ies((const u8 *) (key + 1),
 886                                              key_data_length, &kde) == 0 &&
 887                            kde.mac_addr) {
 888                 } else {
 889                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 890                                         "received EAPOL-Key Request for GTK "
 891                                         "rekeying");
 892                         /* FIX: why was this triggering PTK rekeying for the
 893                          * STA that requested Group Key rekeying?? */
 894                         /* wpa_request_new_ptk(sta->wpa_sm); */
 895                         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
 896                         wpa_rekey_gtk(wpa_auth, NULL);
 897                 }
 898         } else {
 899                 /* Do not allow the same key replay counter to be reused. This
 900                  * does also invalidate all other pending replay counters if
 901                  * retransmissions were used, i.e., we will only process one of
 902                  * the pending replies and ignore rest if more than one is
 903                  * received. */
 904                 sm->key_replay[0].valid = FALSE;
 905         }
 906
 907 #ifdef CONFIG_PEERKEY
 908         if (msg == SMK_M3) {
 909                 wpa_smk_m3(wpa_auth, sm, key);
 910                 return;
 911         }
 912 #endif /* CONFIG_PEERKEY */
 913
 914         os_free(sm->last_rx_eapol_key);
 915         sm->last_rx_eapol_key = os_malloc(data_len);
 916         if (sm->last_rx_eapol_key == NULL)
 917                 return;
 918         os_memcpy(sm->last_rx_eapol_key, data, data_len);
 919         sm->last_rx_eapol_key_len = data_len;
 920
 921         sm->EAPOLKeyReceived = TRUE;
 922         sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
 923         sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
 924         os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
 925         wpa_sm_step(sm);
 926 }
 927
 928
 929 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
 930                            u8 *gtk, size_t gtk_len)
 931 {
 932         u8 data[ETH_ALEN + WPA_NONCE_LEN];
 933
 934         /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
 935         os_memcpy(data, addr, ETH_ALEN);
 936         os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
 937
 938 #ifdef CONFIG_IEEE80211W
 939         sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
 940                    data, sizeof(data), gtk, gtk_len);
 941 #else /* CONFIG_IEEE80211W */
 942         sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
 943                  data, sizeof(data), gtk, gtk_len);
 944 #endif /* CONFIG_IEEE80211W */
 945
 946         wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
 947         wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
 948 }
 949
 950
 951 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
 952 {
 953         struct wpa_authenticator *wpa_auth = eloop_ctx;
 954         struct wpa_state_machine *sm = timeout_ctx;
 955
 956         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
 957         sm->TimeoutEvt = TRUE;
 958         wpa_sm_step(sm);
 959 }
 960
 961
 962 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
 963                       struct wpa_state_machine *sm, int key_info,
 964                       const u8 *key_rsc, const u8 *nonce,
 965                       const u8 *kde, size_t kde_len,
 966                       int keyidx, int encr, int force_version)
 967 {
 968         struct ieee802_1x_hdr *hdr;
 969         struct wpa_eapol_key *key;
 970         size_t len;
 971         int alg;
 972         int key_data_len, pad_len = 0;
 973         u8 *buf, *pos;
 974         int version, pairwise;
 975         int i;
 976
 977         len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
 978
 979         if (force_version)
 980                 version = force_version;
 981         else if (wpa_use_aes_cmac(sm))
 982                 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
 983         else if (sm->pairwise == WPA_CIPHER_CCMP)
 984                 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
 985         else
 986                 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
 987
 988         pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
 989
 990         wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
 991                    "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
 992                    "encr=%d)",
 993                    version,
 994                    (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
 995                    (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
 996                    (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
 997                    (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
 998                    pairwise, (unsigned long) kde_len, keyidx, encr);
 999
1000         key_data_len = kde_len;
1001
1002         if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1003              version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1004                 pad_len = key_data_len % 8;
1005                 if (pad_len)
1006                         pad_len = 8 - pad_len;
1007                 key_data_len += pad_len + 8;
1008         }
1009
1010         len += key_data_len;
1011
1012         hdr = os_zalloc(len);
1013         if (hdr == NULL)
1014                 return;
1015         hdr->version = wpa_auth->conf.eapol_version;
1016         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1017         hdr->length = host_to_be16(len  - sizeof(*hdr));
1018         key = (struct wpa_eapol_key *) (hdr + 1);
1019
1020         key->type = sm->wpa == WPA_VERSION_WPA2 ?
1021                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1022         key_info |= version;
1023         if (encr && sm->wpa == WPA_VERSION_WPA2)
1024                 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1025         if (sm->wpa != WPA_VERSION_WPA2)
1026                 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1027         WPA_PUT_BE16(key->key_info, key_info);
1028
1029         alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1030         switch (alg) {
1031         case WPA_CIPHER_CCMP:
1032                 WPA_PUT_BE16(key->key_length, 16);
1033                 break;
1034         case WPA_CIPHER_TKIP:
1035                 WPA_PUT_BE16(key->key_length, 32);
1036                 break;
1037         case WPA_CIPHER_WEP40:
1038                 WPA_PUT_BE16(key->key_length, 5);
1039                 break;
1040         case WPA_CIPHER_WEP104:
1041                 WPA_PUT_BE16(key->key_length, 13);
1042                 break;
1043         }
1044         if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1045                 WPA_PUT_BE16(key->key_length, 0);
1046
1047         /* FIX: STSL: what to use as key_replay_counter? */
1048         for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1049                 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1050                 os_memcpy(sm->key_replay[i].counter,
1051                           sm->key_replay[i - 1].counter,
1052                           WPA_REPLAY_COUNTER_LEN);
1053         }
1054         inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1055         os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1056                   WPA_REPLAY_COUNTER_LEN);
1057         sm->key_replay[0].valid = TRUE;
1058
1059         if (nonce)
1060                 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1061
1062         if (key_rsc)
1063                 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1064
1065         if (kde && !encr) {
1066                 os_memcpy(key + 1, kde, kde_len);
1067                 WPA_PUT_BE16(key->key_data_length, kde_len);
1068         } else if (encr && kde) {
1069                 buf = os_zalloc(key_data_len);
1070                 if (buf == NULL) {
1071                         os_free(hdr);
1072                         return;
1073                 }
1074                 pos = buf;
1075                 os_memcpy(pos, kde, kde_len);
1076                 pos += kde_len;
1077
1078                 if (pad_len)
1079                         *pos++ = 0xdd;
1080
1081                 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1082                                 buf, key_data_len);
1083                 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1084                     version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1085                         if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1086                                      (u8 *) (key + 1))) {
1087                                 os_free(hdr);
1088                                 os_free(buf);
1089                                 return;
1090                         }
1091                         WPA_PUT_BE16(key->key_data_length, key_data_len);
1092                 } else {
1093                         u8 ek[32];
1094                         os_memcpy(key->key_iv,
1095                                   sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1096                         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1097                         os_memcpy(ek, key->key_iv, 16);
1098                         os_memcpy(ek + 16, sm->PTK.kek, 16);
1099                         os_memcpy(key + 1, buf, key_data_len);
1100                         rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1101                         WPA_PUT_BE16(key->key_data_length, key_data_len);
1102                 }
1103                 os_free(buf);
1104         }
1105
1106         if (key_info & WPA_KEY_INFO_MIC) {
1107                 if (!sm->PTK_valid) {
1108                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1109                                         "PTK not valid when sending EAPOL-Key "
1110                                         "frame");
1111                         os_free(hdr);
1112                         return;
1113                 }
1114                 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1115                                   key->key_mic);
1116         }
1117
1118         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1119                            1);
1120         wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1121                             sm->pairwise_set);
1122         os_free(hdr);
1123 }
1124
1125
1126 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1127                            struct wpa_state_machine *sm, int key_info,
1128                            const u8 *key_rsc, const u8 *nonce,
1129                            const u8 *kde, size_t kde_len,
1130                            int keyidx, int encr)
1131 {
1132         int timeout_ms;
1133         int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1134         int ctr;
1135
1136         if (sm == NULL)
1137                 return;
1138
1139         __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1140                          keyidx, encr, 0);
1141
1142         ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1143         if (ctr == 1)
1144                 timeout_ms = eapol_key_timeout_first;
1145         else
1146                 timeout_ms = eapol_key_timeout_subseq;
1147         eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1148                                wpa_send_eapol_timeout, wpa_auth, sm);
1149 }
1150
1151
1152 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1153 {
1154         struct ieee802_1x_hdr *hdr;
1155         struct wpa_eapol_key *key;
1156         u16 key_info;
1157         int ret = 0;
1158         u8 mic[16];
1159
1160         if (data_len < sizeof(*hdr) + sizeof(*key))
1161                 return -1;
1162
1163         hdr = (struct ieee802_1x_hdr *) data;
1164         key = (struct wpa_eapol_key *) (hdr + 1);
1165         key_info = WPA_GET_BE16(key->key_info);
1166         os_memcpy(mic, key->key_mic, 16);
1167         os_memset(key->key_mic, 0, 16);
1168         if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1169                               data, data_len, key->key_mic) ||
1170             os_memcmp(mic, key->key_mic, 16) != 0)
1171                 ret = -1;
1172         os_memcpy(key->key_mic, mic, 16);
1173         return ret;
1174 }
1175
1176
1177 void wpa_remove_ptk(struct wpa_state_machine *sm)
1178 {
1179         sm->PTK_valid = FALSE;
1180         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1181         wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1182         sm->pairwise_set = FALSE;
1183         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1184 }
1185
1186
1187 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1188 {
1189         int remove_ptk = 1;
1190
1191         if (sm == NULL)
1192                 return;
1193
1194         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1195                          "event %d notification", event);
1196
1197         switch (event) {
1198         case WPA_AUTH:
1199         case WPA_ASSOC:
1200                 break;
1201         case WPA_DEAUTH:
1202         case WPA_DISASSOC:
1203                 sm->DeauthenticationRequest = TRUE;
1204                 break;
1205         case WPA_REAUTH:
1206         case WPA_REAUTH_EAPOL:
1207                 if (sm->GUpdateStationKeys) {
1208                         /*
1209                          * Reauthentication cancels the pending group key
1210                          * update for this STA.
1211                          */
1212                         sm->group->GKeyDoneStations--;
1213                         sm->GUpdateStationKeys = FALSE;
1214                         sm->PtkGroupInit = TRUE;
1215                 }
1216                 sm->ReAuthenticationRequest = TRUE;
1217                 break;
1218         case WPA_ASSOC_FT:
1219 #ifdef CONFIG_IEEE80211R
1220                 /* Using FT protocol, not WPA auth state machine */
1221                 sm->ft_completed = 1;
1222                 return;
1223 #else /* CONFIG_IEEE80211R */
1224                 break;
1225 #endif /* CONFIG_IEEE80211R */
1226         }
1227
1228 #ifdef CONFIG_IEEE80211R
1229         sm->ft_completed = 0;
1230 #endif /* CONFIG_IEEE80211R */
1231
1232 #ifdef CONFIG_IEEE80211W
1233         if (sm->mgmt_frame_prot && event == WPA_AUTH)
1234                 remove_ptk = 0;
1235 #endif /* CONFIG_IEEE80211W */
1236
1237         if (remove_ptk) {
1238                 sm->PTK_valid = FALSE;
1239                 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1240
1241                 if (event != WPA_REAUTH_EAPOL)
1242                         wpa_remove_ptk(sm);
1243         }
1244
1245         wpa_sm_step(sm);
1246 }
1247
1248
1249 static const char * wpa_alg_txt(int alg)
1250 {
1251         switch (alg) {
1252         case WPA_CIPHER_CCMP:
1253                 return "CCMP";
1254         case WPA_CIPHER_TKIP:
1255                 return "TKIP";
1256         case WPA_CIPHER_WEP104:
1257         case WPA_CIPHER_WEP40:
1258                 return "WEP";
1259         default:
1260                 return "";
1261         }
1262 }
1263
1264
1265 SM_STATE(WPA_PTK, INITIALIZE)
1266 {
1267         SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1268         if (sm->Init) {
1269                 /* Init flag is not cleared here, so avoid busy
1270                  * loop by claiming nothing changed. */
1271                 sm->changed = FALSE;
1272         }
1273
1274         sm->keycount = 0;
1275         if (sm->GUpdateStationKeys)
1276                 sm->group->GKeyDoneStations--;
1277         sm->GUpdateStationKeys = FALSE;
1278         if (sm->wpa == WPA_VERSION_WPA)
1279                 sm->PInitAKeys = FALSE;
1280         if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1281                * Local AA > Remote AA)) */) {
1282                 sm->Pair = TRUE;
1283         }
1284         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1285         wpa_remove_ptk(sm);
1286         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1287         sm->TimeoutCtr = 0;
1288         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1289                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1290                                    WPA_EAPOL_authorized, 0);
1291         }
1292 }
1293
1294
1295 SM_STATE(WPA_PTK, DISCONNECT)
1296 {
1297         SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1298         sm->Disconnect = FALSE;
1299         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1300 }
1301
1302
1303 SM_STATE(WPA_PTK, DISCONNECTED)
1304 {
1305         SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1306         sm->DeauthenticationRequest = FALSE;
1307 }
1308
1309
1310 SM_STATE(WPA_PTK, AUTHENTICATION)
1311 {
1312         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1313         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1314         sm->PTK_valid = FALSE;
1315         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1316                            1);
1317         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1318         sm->AuthenticationRequest = FALSE;
1319 }
1320
1321
1322 SM_STATE(WPA_PTK, AUTHENTICATION2)
1323 {
1324         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1325         os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1326         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1327         sm->ReAuthenticationRequest = FALSE;
1328         /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1329          * logical place than INITIALIZE since AUTHENTICATION2 can be
1330          * re-entered on ReAuthenticationRequest without going through
1331          * INITIALIZE. */
1332         sm->TimeoutCtr = 0;
1333 }
1334
1335
1336 SM_STATE(WPA_PTK, INITPMK)
1337 {
1338         u8 msk[2 * PMK_LEN];
1339         size_t len = 2 * PMK_LEN;
1340
1341         SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1342 #ifdef CONFIG_IEEE80211R
1343         sm->xxkey_len = 0;
1344 #endif /* CONFIG_IEEE80211R */
1345         if (sm->pmksa) {
1346                 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1347                 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1348         } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1349                 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1350                            "(len=%lu)", (unsigned long) len);
1351                 os_memcpy(sm->PMK, msk, PMK_LEN);
1352 #ifdef CONFIG_IEEE80211R
1353                 if (len >= 2 * PMK_LEN) {
1354                         os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1355                         sm->xxkey_len = PMK_LEN;
1356                 }
1357 #endif /* CONFIG_IEEE80211R */
1358         } else {
1359                 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1360         }
1361
1362         sm->req_replay_counter_used = 0;
1363         /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1364          * will break reauthentication since EAPOL state machines may not be
1365          * get into AUTHENTICATING state that clears keyRun before WPA state
1366          * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1367          * state and takes PMK from the previously used AAA Key. This will
1368          * eventually fail in 4-Way Handshake because Supplicant uses PMK
1369          * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1370          * be good workaround for this issue. */
1371         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1372 }
1373
1374
1375 SM_STATE(WPA_PTK, INITPSK)
1376 {
1377         const u8 *psk;
1378         SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1379         psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1380         if (psk) {
1381                 os_memcpy(sm->PMK, psk, PMK_LEN);
1382 #ifdef CONFIG_IEEE80211R
1383                 os_memcpy(sm->xxkey, psk, PMK_LEN);
1384                 sm->xxkey_len = PMK_LEN;
1385 #endif /* CONFIG_IEEE80211R */
1386         }
1387         sm->req_replay_counter_used = 0;
1388 }
1389
1390
1391 SM_STATE(WPA_PTK, PTKSTART)
1392 {
1393         u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1394         size_t pmkid_len = 0;
1395
1396         SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1397         sm->PTKRequest = FALSE;
1398         sm->TimeoutEvt = FALSE;
1399
1400         sm->TimeoutCtr++;
1401         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1402                 /* No point in sending the EAPOL-Key - we will disconnect
1403                  * immediately following this. */
1404                 return;
1405         }
1406
1407         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1408                         "sending 1/4 msg of 4-Way Handshake");
1409         /*
1410          * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1411          * one possible PSK for this STA.
1412          */
1413         if (sm->wpa == WPA_VERSION_WPA2 &&
1414             wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1415                 pmkid = buf;
1416                 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1417                 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1418                 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1419                 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1420                 if (sm->pmksa)
1421                         os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1422                                   sm->pmksa->pmkid, PMKID_LEN);
1423                 else {
1424                         /*
1425                          * Calculate PMKID since no PMKSA cache entry was
1426                          * available with pre-calculated PMKID.
1427                          */
1428                         rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1429                                   sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1430                                   wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1431                 }
1432         }
1433         wpa_send_eapol(sm->wpa_auth, sm,
1434                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1435                        sm->ANonce, pmkid, pmkid_len, 0, 0);
1436 }
1437
1438
1439 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1440                           struct wpa_ptk *ptk)
1441 {
1442         size_t ptk_len = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
1443 #ifdef CONFIG_IEEE80211R
1444         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1445                 return wpa_auth_derive_ptk_ft(sm, pmk, ptk, ptk_len);
1446 #endif /* CONFIG_IEEE80211R */
1447
1448         wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1449                        sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1450                        (u8 *) ptk, ptk_len,
1451                        wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1452
1453         return 0;
1454 }
1455
1456
1457 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1458 {
1459         struct wpa_ptk PTK;
1460         int ok = 0;
1461         const u8 *pmk = NULL;
1462
1463         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1464         sm->EAPOLKeyReceived = FALSE;
1465
1466         /* WPA with IEEE 802.1X: use the derived PMK from EAP
1467          * WPA-PSK: iterate through possible PSKs and select the one matching
1468          * the packet */
1469         for (;;) {
1470                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1471                         pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1472                         if (pmk == NULL)
1473                                 break;
1474                 } else
1475                         pmk = sm->PMK;
1476
1477                 wpa_derive_ptk(sm, pmk, &PTK);
1478
1479                 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1480                                        sm->last_rx_eapol_key_len) == 0) {
1481                         ok = 1;
1482                         break;
1483                 }
1484
1485                 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1486                         break;
1487         }
1488
1489         if (!ok) {
1490                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1491                                 "invalid MIC in msg 2/4 of 4-Way Handshake");
1492                 return;
1493         }
1494
1495         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1496
1497         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1498                 /* PSK may have changed from the previous choice, so update
1499                  * state machine data based on whatever PSK was selected here.
1500                  */
1501                 os_memcpy(sm->PMK, pmk, PMK_LEN);
1502         }
1503
1504         sm->MICVerified = TRUE;
1505
1506         os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1507         sm->PTK_valid = TRUE;
1508 }
1509
1510
1511 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1512 {
1513         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1514         sm->TimeoutCtr = 0;
1515 }
1516
1517
1518 #ifdef CONFIG_IEEE80211W
1519
1520 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1521 {
1522         if (sm->mgmt_frame_prot) {
1523                 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1524         }
1525
1526         return 0;
1527 }
1528
1529
1530 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1531 {
1532         struct wpa_igtk_kde igtk;
1533         struct wpa_group *gsm = sm->group;
1534
1535         if (!sm->mgmt_frame_prot)
1536                 return pos;
1537
1538         igtk.keyid[0] = gsm->GN_igtk;
1539         igtk.keyid[1] = 0;
1540         if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1541             < 0)
1542                 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1543         os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1544         pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1545                           (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1546
1547         return pos;
1548 }
1549
1550 #else /* CONFIG_IEEE80211W */
1551
1552 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1553 {
1554         return 0;
1555 }
1556
1557
1558 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1559 {
1560         return pos;
1561 }
1562
1563 #endif /* CONFIG_IEEE80211W */
1564
1565
1566 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1567 {
1568         u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1569         size_t gtk_len, kde_len;
1570         struct wpa_group *gsm = sm->group;
1571         u8 *wpa_ie;
1572         int wpa_ie_len, secure, keyidx, encr = 0;
1573
1574         SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1575         sm->TimeoutEvt = FALSE;
1576
1577         sm->TimeoutCtr++;
1578         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1579                 /* No point in sending the EAPOL-Key - we will disconnect
1580                  * immediately following this. */
1581                 return;
1582         }
1583
1584         /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1585          */
1586         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1587         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1588         wpa_ie = sm->wpa_auth->wpa_ie;
1589         wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1590         if (sm->wpa == WPA_VERSION_WPA &&
1591             (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1592             wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1593                 /* WPA-only STA, remove RSN IE */
1594                 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1595                 wpa_ie_len = wpa_ie[1] + 2;
1596         }
1597         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1598                         "sending 3/4 msg of 4-Way Handshake");
1599         if (sm->wpa == WPA_VERSION_WPA2) {
1600                 /* WPA2 send GTK in the 4-way handshake */
1601                 secure = 1;
1602                 gtk = gsm->GTK[gsm->GN - 1];
1603                 gtk_len = gsm->GTK_len;
1604                 keyidx = gsm->GN;
1605                 _rsc = rsc;
1606                 encr = 1;
1607         } else {
1608                 /* WPA does not include GTK in msg 3/4 */
1609                 secure = 0;
1610                 gtk = NULL;
1611                 gtk_len = 0;
1612                 keyidx = 0;
1613                 _rsc = NULL;
1614         }
1615
1616         kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1617         if (gtk)
1618                 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1619         kde = os_malloc(kde_len);
1620         if (kde == NULL)
1621                 return;
1622
1623         pos = kde;
1624         os_memcpy(pos, wpa_ie, wpa_ie_len);
1625         pos += wpa_ie_len;
1626         if (gtk) {
1627                 u8 hdr[2];
1628                 hdr[0] = keyidx & 0x03;
1629                 hdr[1] = 0;
1630                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1631                                   gtk, gtk_len);
1632         }
1633         pos = ieee80211w_kde_add(sm, pos);
1634
1635         wpa_send_eapol(sm->wpa_auth, sm,
1636                        (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1637                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1638                        WPA_KEY_INFO_KEY_TYPE,
1639                        _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1640         os_free(kde);
1641 }
1642
1643
1644 SM_STATE(WPA_PTK, PTKINITDONE)
1645 {
1646         SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1647         sm->EAPOLKeyReceived = FALSE;
1648         if (sm->Pair) {
1649                 char *alg;
1650                 int klen;
1651                 if (sm->pairwise == WPA_CIPHER_TKIP) {
1652                         alg = "TKIP";
1653                         klen = 32;
1654                 } else {
1655                         alg = "CCMP";
1656                         klen = 16;
1657                 }
1658                 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1659                                      sm->PTK.tk1, klen)) {
1660                         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1661                         return;
1662                 }
1663                 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1664                 sm->pairwise_set = TRUE;
1665
1666                 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1667                         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1668                         eloop_register_timeout(sm->wpa_auth->conf.
1669                                                wpa_ptk_rekey, 0, wpa_rekey_ptk,
1670                                                sm->wpa_auth, sm);
1671                 }
1672
1673                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1674                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1675                                            WPA_EAPOL_authorized, 1);
1676                 }
1677         }
1678
1679         if (0 /* IBSS == TRUE */) {
1680                 sm->keycount++;
1681                 if (sm->keycount == 2) {
1682                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1683                                            WPA_EAPOL_portValid, 1);
1684                 }
1685         } else {
1686                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1687                                    1);
1688         }
1689         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1690         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1691         if (sm->wpa == WPA_VERSION_WPA)
1692                 sm->PInitAKeys = TRUE;
1693         else
1694                 sm->has_GTK = TRUE;
1695         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1696                          "pairwise key handshake completed (%s)",
1697                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1698
1699 #ifdef CONFIG_IEEE80211R
1700         wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1701 #endif /* CONFIG_IEEE80211R */
1702 }
1703
1704
1705 SM_STEP(WPA_PTK)
1706 {
1707         struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1708
1709         if (sm->Init)
1710                 SM_ENTER(WPA_PTK, INITIALIZE);
1711         else if (sm->Disconnect
1712                  /* || FIX: dot11RSNAConfigSALifetime timeout */)
1713                 SM_ENTER(WPA_PTK, DISCONNECT);
1714         else if (sm->DeauthenticationRequest)
1715                 SM_ENTER(WPA_PTK, DISCONNECTED);
1716         else if (sm->AuthenticationRequest)
1717                 SM_ENTER(WPA_PTK, AUTHENTICATION);
1718         else if (sm->ReAuthenticationRequest)
1719                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1720         else if (sm->PTKRequest)
1721                 SM_ENTER(WPA_PTK, PTKSTART);
1722         else switch (sm->wpa_ptk_state) {
1723         case WPA_PTK_INITIALIZE:
1724                 break;
1725         case WPA_PTK_DISCONNECT:
1726                 SM_ENTER(WPA_PTK, DISCONNECTED);
1727                 break;
1728         case WPA_PTK_DISCONNECTED:
1729                 SM_ENTER(WPA_PTK, INITIALIZE);
1730                 break;
1731         case WPA_PTK_AUTHENTICATION:
1732                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1733                 break;
1734         case WPA_PTK_AUTHENTICATION2:
1735                 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1736                     wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1737                                        WPA_EAPOL_keyRun) > 0)
1738                         SM_ENTER(WPA_PTK, INITPMK);
1739                 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1740                          /* FIX: && 802.1X::keyRun */)
1741                         SM_ENTER(WPA_PTK, INITPSK);
1742                 break;
1743         case WPA_PTK_INITPMK:
1744                 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1745                                        WPA_EAPOL_keyAvailable) > 0)
1746                         SM_ENTER(WPA_PTK, PTKSTART);
1747                 else {
1748                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1749                         SM_ENTER(WPA_PTK, DISCONNECT);
1750                 }
1751                 break;
1752         case WPA_PTK_INITPSK:
1753                 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1754                         SM_ENTER(WPA_PTK, PTKSTART);
1755                 else {
1756                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1757                                         "no PSK configured for the STA");
1758                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1759                         SM_ENTER(WPA_PTK, DISCONNECT);
1760                 }
1761                 break;
1762         case WPA_PTK_PTKSTART:
1763                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1764                     sm->EAPOLKeyPairwise)
1765                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1766                 else if (sm->TimeoutCtr >
1767                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1768                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1769                         SM_ENTER(WPA_PTK, DISCONNECT);
1770                 } else if (sm->TimeoutEvt)
1771                         SM_ENTER(WPA_PTK, PTKSTART);
1772                 break;
1773         case WPA_PTK_PTKCALCNEGOTIATING:
1774                 if (sm->MICVerified)
1775                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1776                 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1777                          sm->EAPOLKeyPairwise)
1778                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1779                 else if (sm->TimeoutEvt)
1780                         SM_ENTER(WPA_PTK, PTKSTART);
1781                 break;
1782         case WPA_PTK_PTKCALCNEGOTIATING2:
1783                 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1784                 break;
1785         case WPA_PTK_PTKINITNEGOTIATING:
1786                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1787                     sm->EAPOLKeyPairwise && sm->MICVerified)
1788                         SM_ENTER(WPA_PTK, PTKINITDONE);
1789                 else if (sm->TimeoutCtr >
1790                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1791                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1792                         SM_ENTER(WPA_PTK, DISCONNECT);
1793                 } else if (sm->TimeoutEvt)
1794                         SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1795                 break;
1796         case WPA_PTK_PTKINITDONE:
1797                 break;
1798         }
1799 }
1800
1801
1802 SM_STATE(WPA_PTK_GROUP, IDLE)
1803 {
1804         SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1805         if (sm->Init) {
1806                 /* Init flag is not cleared here, so avoid busy
1807                  * loop by claiming nothing changed. */
1808                 sm->changed = FALSE;
1809         }
1810         sm->GTimeoutCtr = 0;
1811 }
1812
1813
1814 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1815 {
1816         u8 rsc[WPA_KEY_RSC_LEN];
1817         struct wpa_group *gsm = sm->group;
1818         u8 *kde, *pos, hdr[2];
1819         size_t kde_len;
1820
1821         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1822
1823         sm->GTimeoutCtr++;
1824         if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
1825                 /* No point in sending the EAPOL-Key - we will disconnect
1826                  * immediately following this. */
1827                 return;
1828         }
1829
1830         if (sm->wpa == WPA_VERSION_WPA)
1831                 sm->PInitAKeys = FALSE;
1832         sm->TimeoutEvt = FALSE;
1833         /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1834         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1835         if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1836                 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1837         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1838                         "sending 1/2 msg of Group Key Handshake");
1839
1840         if (sm->wpa == WPA_VERSION_WPA2) {
1841                 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1842                         ieee80211w_kde_len(sm);
1843                 kde = os_malloc(kde_len);
1844                 if (kde == NULL)
1845                         return;
1846
1847                 pos = kde;
1848                 hdr[0] = gsm->GN & 0x03;
1849                 hdr[1] = 0;
1850                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1851                                   gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1852                 pos = ieee80211w_kde_add(sm, pos);
1853         } else {
1854                 kde = gsm->GTK[gsm->GN - 1];
1855                 pos = kde + gsm->GTK_len;
1856         }
1857
1858         wpa_send_eapol(sm->wpa_auth, sm,
1859                        WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1860                        WPA_KEY_INFO_ACK |
1861                        (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1862                        rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1863         if (sm->wpa == WPA_VERSION_WPA2)
1864                 os_free(kde);
1865 }
1866
1867
1868 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1869 {
1870         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1871         sm->EAPOLKeyReceived = FALSE;
1872         if (sm->GUpdateStationKeys)
1873                 sm->group->GKeyDoneStations--;
1874         sm->GUpdateStationKeys = FALSE;
1875         sm->GTimeoutCtr = 0;
1876         /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1877         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1878                          "group key handshake completed (%s)",
1879                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1880         sm->has_GTK = TRUE;
1881 }
1882
1883
1884 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1885 {
1886         SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1887         if (sm->GUpdateStationKeys)
1888                 sm->group->GKeyDoneStations--;
1889         sm->GUpdateStationKeys = FALSE;
1890         sm->Disconnect = TRUE;
1891 }
1892
1893
1894 SM_STEP(WPA_PTK_GROUP)
1895 {
1896         if (sm->Init || sm->PtkGroupInit) {
1897                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1898                 sm->PtkGroupInit = FALSE;
1899         } else switch (sm->wpa_ptk_group_state) {
1900         case WPA_PTK_GROUP_IDLE:
1901                 if (sm->GUpdateStationKeys ||
1902                     (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1903                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1904                 break;
1905         case WPA_PTK_GROUP_REKEYNEGOTIATING:
1906                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1907                     !sm->EAPOLKeyPairwise && sm->MICVerified)
1908                         SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1909                 else if (sm->GTimeoutCtr >
1910                          (int) dot11RSNAConfigGroupUpdateCount)
1911                         SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1912                 else if (sm->TimeoutEvt)
1913                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1914                 break;
1915         case WPA_PTK_GROUP_KEYERROR:
1916                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1917                 break;
1918         case WPA_PTK_GROUP_REKEYESTABLISHED:
1919                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1920                 break;
1921         }
1922 }
1923
1924
1925 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1926                           struct wpa_group *group)
1927 {
1928         int ret = 0;
1929
1930         /* FIX: is this the correct way of getting GNonce? */
1931         os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1932         inc_byte_array(group->Counter, WPA_NONCE_LEN);
1933         wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1934                        group->GTK[group->GN - 1], group->GTK_len);
1935
1936 #ifdef CONFIG_IEEE80211W
1937         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1938                 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1939                                   WPA_IGTK_LEN) < 0) {
1940                         wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1941                                    "IGTK");
1942                         ret = -1;
1943                 }
1944                 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1945                                 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1946         }
1947 #endif /* CONFIG_IEEE80211W */
1948
1949         return ret;
1950 }
1951
1952
1953 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1954                                struct wpa_group *group)
1955 {
1956         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1957                    "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1958         group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1959         group->wpa_group_state = WPA_GROUP_GTK_INIT;
1960
1961         /* GTK[0..N] = 0 */
1962         os_memset(group->GTK, 0, sizeof(group->GTK));
1963         group->GN = 1;
1964         group->GM = 2;
1965 #ifdef CONFIG_IEEE80211W
1966         group->GN_igtk = 4;
1967         group->GM_igtk = 5;
1968 #endif /* CONFIG_IEEE80211W */
1969         /* GTK[GN] = CalcGTK() */
1970         wpa_gtk_update(wpa_auth, group);
1971 }
1972
1973
1974 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1975 {
1976         if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1977                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1978                                 "Not in PTKINITDONE; skip Group Key update");
1979                 return 0;
1980         }
1981         if (sm->GUpdateStationKeys) {
1982                 /*
1983                  * This should not really happen, but just in case, make sure
1984                  * we do not count the same STA twice in GKeyDoneStations.
1985                  */
1986                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1987                                 "GUpdateStationKeys already set - do not "
1988                                 "increment GKeyDoneStations");
1989         } else {
1990                 sm->group->GKeyDoneStations++;
1991                 sm->GUpdateStationKeys = TRUE;
1992         }
1993         wpa_sm_step(sm);
1994         return 0;
1995 }
1996
1997
1998 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1999                               struct wpa_group *group)
2000 {
2001         int tmp;
2002
2003         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2004                    "SETKEYS (VLAN-ID %d)", group->vlan_id);
2005         group->changed = TRUE;
2006         group->wpa_group_state = WPA_GROUP_SETKEYS;
2007         group->GTKReKey = FALSE;
2008         tmp = group->GM;
2009         group->GM = group->GN;
2010         group->GN = tmp;
2011 #ifdef CONFIG_IEEE80211W
2012         tmp = group->GM_igtk;
2013         group->GM_igtk = group->GN_igtk;
2014         group->GN_igtk = tmp;
2015 #endif /* CONFIG_IEEE80211W */
2016         /* "GKeyDoneStations = GNoStations" is done in more robust way by
2017          * counting the STAs that are marked with GUpdateStationKeys instead of
2018          * including all STAs that could be in not-yet-completed state. */
2019         wpa_gtk_update(wpa_auth, group);
2020
2021         wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
2022         wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2023                    group->GKeyDoneStations);
2024 }
2025
2026
2027 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2028                                   struct wpa_group *group)
2029 {
2030         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2031                    "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2032         group->changed = TRUE;
2033         group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2034         wpa_auth_set_key(wpa_auth, group->vlan_id,
2035                          wpa_alg_txt(wpa_auth->conf.wpa_group),
2036                          NULL, group->GN, group->GTK[group->GN - 1],
2037                          group->GTK_len);
2038
2039 #ifdef CONFIG_IEEE80211W
2040         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
2041                 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
2042                                  NULL, group->GN_igtk,
2043                                  group->IGTK[group->GN_igtk - 4],
2044                                  WPA_IGTK_LEN);
2045         }
2046 #endif /* CONFIG_IEEE80211W */
2047 }
2048
2049
2050 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2051                               struct wpa_group *group)
2052 {
2053         if (group->GInit) {
2054                 wpa_group_gtk_init(wpa_auth, group);
2055         } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2056                    group->GTKAuthenticator) {
2057                 wpa_group_setkeysdone(wpa_auth, group);
2058         } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2059                    group->GTKReKey) {
2060                 wpa_group_setkeys(wpa_auth, group);
2061         } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2062                 if (group->GKeyDoneStations == 0)
2063                         wpa_group_setkeysdone(wpa_auth, group);
2064                 else if (group->GTKReKey)
2065                         wpa_group_setkeys(wpa_auth, group);
2066         }
2067 }
2068
2069
2070 static void wpa_sm_step(struct wpa_state_machine *sm)
2071 {
2072         if (sm == NULL)
2073                 return;
2074
2075         if (sm->in_step_loop) {
2076                 /* This should not happen, but if it does, make sure we do not
2077                  * end up freeing the state machine too early by exiting the
2078                  * recursive call. */
2079                 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2080                 return;
2081         }
2082
2083         sm->in_step_loop = 1;
2084         do {
2085                 if (sm->pending_deinit)
2086                         break;
2087
2088                 sm->changed = FALSE;
2089                 sm->wpa_auth->group->changed = FALSE;
2090
2091                 SM_STEP_RUN(WPA_PTK);
2092                 if (sm->pending_deinit)
2093                         break;
2094                 SM_STEP_RUN(WPA_PTK_GROUP);
2095                 if (sm->pending_deinit)
2096                         break;
2097                 wpa_group_sm_step(sm->wpa_auth, sm->group);
2098         } while (sm->changed || sm->wpa_auth->group->changed);
2099         sm->in_step_loop = 0;
2100
2101         if (sm->pending_deinit) {
2102                 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2103                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
2104                 wpa_free_sta_sm(sm);
2105         }
2106 }
2107
2108
2109 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2110 {
2111         struct wpa_state_machine *sm = eloop_ctx;
2112         wpa_sm_step(sm);
2113 }
2114
2115
2116 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2117 {
2118         if (sm == NULL)
2119                 return;
2120         eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2121 }
2122
2123
2124 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2125 {
2126         int tmp, i;
2127         struct wpa_group *group;
2128
2129         if (wpa_auth == NULL)
2130                 return;
2131
2132         group = wpa_auth->group;
2133
2134         for (i = 0; i < 2; i++) {
2135                 tmp = group->GM;
2136                 group->GM = group->GN;
2137                 group->GN = tmp;
2138 #ifdef CONFIG_IEEE80211W
2139                 tmp = group->GM_igtk;
2140                 group->GM_igtk = group->GN_igtk;
2141                 group->GN_igtk = tmp;
2142 #endif /* CONFIG_IEEE80211W */
2143                 wpa_gtk_update(wpa_auth, group);
2144         }
2145 }
2146
2147
2148 static const char * wpa_bool_txt(int bool)
2149 {
2150         return bool ? "TRUE" : "FALSE";
2151 }
2152
2153
2154 static int wpa_cipher_bits(int cipher)
2155 {
2156         switch (cipher) {
2157         case WPA_CIPHER_CCMP:
2158                 return 128;
2159         case WPA_CIPHER_TKIP:
2160                 return 256;
2161         case WPA_CIPHER_WEP104:
2162                 return 104;
2163         case WPA_CIPHER_WEP40:
2164                 return 40;
2165         default:
2166                 return 0;
2167         }
2168 }
2169
2170
2171 #define RSN_SUITE "%02x-%02x-%02x-%d"
2172 #define RSN_SUITE_ARG(s) \
2173 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2174
2175 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2176 {
2177         int len = 0, ret;
2178         char pmkid_txt[PMKID_LEN * 2 + 1];
2179
2180         if (wpa_auth == NULL)
2181                 return len;
2182
2183         ret = os_snprintf(buf + len, buflen - len,
2184                           "dot11RSNAOptionImplemented=TRUE\n"
2185 #ifdef CONFIG_RSN_PREAUTH
2186                           "dot11RSNAPreauthenticationImplemented=TRUE\n"
2187 #else /* CONFIG_RSN_PREAUTH */
2188                           "dot11RSNAPreauthenticationImplemented=FALSE\n"
2189 #endif /* CONFIG_RSN_PREAUTH */
2190                           "dot11RSNAEnabled=%s\n"
2191                           "dot11RSNAPreauthenticationEnabled=%s\n",
2192                           wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2193                           wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2194         if (ret < 0 || (size_t) ret >= buflen - len)
2195                 return len;
2196         len += ret;
2197
2198         wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2199                          wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2200
2201         ret = os_snprintf(
2202                 buf + len, buflen - len,
2203                 "dot11RSNAConfigVersion=%u\n"
2204                 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2205                 /* FIX: dot11RSNAConfigGroupCipher */
2206                 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2207                 /* FIX: dot11RSNAConfigGroupRekeyTime */
2208                 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2209                 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2210                 "dot11RSNAConfigGroupUpdateCount=%u\n"
2211                 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2212                 "dot11RSNAConfigGroupCipherSize=%u\n"
2213                 "dot11RSNAConfigPMKLifetime=%u\n"
2214                 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2215                 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2216                 "dot11RSNAConfigSATimeout=%u\n"
2217                 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2218                 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2219                 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2220                 "dot11RSNAPMKIDUsed=%s\n"
2221                 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2222                 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2223                 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2224                 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2225                 "dot11RSNA4WayHandshakeFailures=%u\n"
2226                 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2227                 RSN_VERSION,
2228                 !!wpa_auth->conf.wpa_strict_rekey,
2229                 dot11RSNAConfigGroupUpdateCount,
2230                 dot11RSNAConfigPairwiseUpdateCount,
2231                 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2232                 dot11RSNAConfigPMKLifetime,
2233                 dot11RSNAConfigPMKReauthThreshold,
2234                 dot11RSNAConfigSATimeout,
2235                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2236                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2237                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2238                 pmkid_txt,
2239                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2240                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2241                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2242                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2243                 wpa_auth->dot11RSNA4WayHandshakeFailures);
2244         if (ret < 0 || (size_t) ret >= buflen - len)
2245                 return len;
2246         len += ret;
2247
2248         /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2249         /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2250
2251         /* Private MIB */
2252         ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2253                           wpa_auth->group->wpa_group_state);
2254         if (ret < 0 || (size_t) ret >= buflen - len)
2255                 return len;
2256         len += ret;
2257
2258         return len;
2259 }
2260
2261
2262 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2263 {
2264         int len = 0, ret;
2265         u32 pairwise = 0;
2266
2267         if (sm == NULL)
2268                 return 0;
2269
2270         /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2271
2272         /* dot11RSNAStatsEntry */
2273
2274         if (sm->wpa == WPA_VERSION_WPA) {
2275                 if (sm->pairwise == WPA_CIPHER_CCMP)
2276                         pairwise = WPA_CIPHER_SUITE_CCMP;
2277                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2278                         pairwise = WPA_CIPHER_SUITE_TKIP;
2279                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2280                         pairwise = WPA_CIPHER_SUITE_WEP104;
2281                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2282                         pairwise = WPA_CIPHER_SUITE_WEP40;
2283                 else if (sm->pairwise == WPA_CIPHER_NONE)
2284                         pairwise = WPA_CIPHER_SUITE_NONE;
2285         } else if (sm->wpa == WPA_VERSION_WPA2) {
2286                 if (sm->pairwise == WPA_CIPHER_CCMP)
2287                         pairwise = RSN_CIPHER_SUITE_CCMP;
2288                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2289                         pairwise = RSN_CIPHER_SUITE_TKIP;
2290                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2291                         pairwise = RSN_CIPHER_SUITE_WEP104;
2292                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2293                         pairwise = RSN_CIPHER_SUITE_WEP40;
2294                 else if (sm->pairwise == WPA_CIPHER_NONE)
2295                         pairwise = RSN_CIPHER_SUITE_NONE;
2296         } else
2297                 return 0;
2298
2299         ret = os_snprintf(
2300                 buf + len, buflen - len,
2301                 /* TODO: dot11RSNAStatsIndex */
2302                 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2303                 "dot11RSNAStatsVersion=1\n"
2304                 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2305                 /* TODO: dot11RSNAStatsTKIPICVErrors */
2306                 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2307                 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2308                 /* TODO: dot11RSNAStatsCCMPReplays */
2309                 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2310                 /* TODO: dot11RSNAStatsTKIPReplays */,
2311                 MAC2STR(sm->addr),
2312                 RSN_SUITE_ARG(pairwise),
2313                 sm->dot11RSNAStatsTKIPLocalMICFailures,
2314                 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2315         if (ret < 0 || (size_t) ret >= buflen - len)
2316                 return len;
2317         len += ret;
2318
2319         /* Private MIB */
2320         ret = os_snprintf(buf + len, buflen - len,
2321                           "hostapdWPAPTKState=%d\n"
2322                           "hostapdWPAPTKGroupState=%d\n",
2323                           sm->wpa_ptk_state,
2324                           sm->wpa_ptk_group_state);
2325         if (ret < 0 || (size_t) ret >= buflen - len)
2326                 return len;
2327         len += ret;
2328
2329         return len;
2330 }
2331
2332
2333 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2334 {
2335         if (wpa_auth)
2336                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2337 }
2338
2339
2340 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2341 {
2342         return sm && sm->pairwise_set;
2343 }
2344
2345
2346 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2347 {
2348         return sm->pairwise;
2349 }
2350
2351
2352 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2353 {
2354         if (sm == NULL)
2355                 return -1;
2356         return sm->wpa_key_mgmt;
2357 }
2358
2359
2360 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2361 {
2362         if (sm == NULL)
2363                 return 0;
2364         return sm->wpa;
2365 }
2366
2367
2368 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2369                              struct rsn_pmksa_cache_entry *entry)
2370 {
2371         if (sm == NULL || sm->pmksa != entry)
2372                 return -1;
2373         sm->pmksa = NULL;
2374         return 0;
2375 }
2376
2377
2378 struct rsn_pmksa_cache_entry *
2379 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2380 {
2381         return sm ? sm->pmksa : NULL;
2382 }
2383
2384
2385 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2386 {
2387         if (sm)
2388                 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2389 }
2390
2391
2392 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2393 {
2394         if (wpa_auth == NULL)
2395                 return NULL;
2396         *len = wpa_auth->wpa_ie_len;
2397         return wpa_auth->wpa_ie;
2398 }
2399
2400
2401 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2402                        int session_timeout, struct eapol_state_machine *eapol)
2403 {
2404         if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2405                 return -1;
2406
2407         if (pmksa_cache_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2408                             sm->wpa_auth->addr, sm->addr, session_timeout,
2409                             eapol, sm->wpa_key_mgmt))
2410                 return 0;
2411
2412         return -1;
2413 }
2414
2415
2416 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2417                                const u8 *pmk, size_t len, const u8 *sta_addr,
2418                                int session_timeout,
2419                                struct eapol_state_machine *eapol)
2420 {
2421         if (wpa_auth == NULL)
2422                 return -1;
2423
2424         if (pmksa_cache_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2425                             sta_addr, session_timeout, eapol,
2426                             WPA_KEY_MGMT_IEEE8021X))
2427                 return 0;
2428
2429         return -1;
2430 }
2431
2432
2433 static struct wpa_group *
2434 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2435 {
2436         struct wpa_group *group;
2437
2438         if (wpa_auth == NULL || wpa_auth->group == NULL)
2439                 return NULL;
2440
2441         wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2442                    vlan_id);
2443         group = wpa_group_init(wpa_auth, vlan_id);
2444         if (group == NULL)
2445                 return NULL;
2446
2447         group->next = wpa_auth->group->next;
2448         wpa_auth->group->next = group;
2449
2450         return group;
2451 }
2452
2453
2454 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2455 {
2456         struct wpa_group *group;
2457
2458         if (sm == NULL || sm->wpa_auth == NULL)
2459                 return 0;
2460
2461         group = sm->wpa_auth->group;
2462         while (group) {
2463                 if (group->vlan_id == vlan_id)
2464                         break;
2465                 group = group->next;
2466         }
2467
2468         if (group == NULL) {
2469                 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2470                 if (group == NULL)
2471                         return -1;
2472         }
2473
2474         if (sm->group == group)
2475                 return 0;
2476
2477         wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2478                    "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2479
2480         sm->group = group;
2481         return 0;
2482 }
2483
2484 #endif /* CONFIG_NATIVE_WINDOWS */