hostapd/wpa.c

   1 /*
   2  * hostapd - IEEE 802.11i-2004 / WPA Authenticator
   3  * Copyright (c) 2004-2008, 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
  47 /* Default timeouts are 100 ms, but this seems to be a bit too fast for most
  48  * WPA Supplicants, so use a bit longer timeout. */
  49 static const u32 dot11RSNAConfigGroupUpdateTimeOut = 1000; /* ms */
  50 static const u32 dot11RSNAConfigGroupUpdateCount = 3;
  51 static const u32 dot11RSNAConfigPairwiseUpdateTimeOut = 1000; /* ms */
  52 static const u32 dot11RSNAConfigPairwiseUpdateCount = 3;
  53
  54 /* TODO: make these configurable */
  55 static const int dot11RSNAConfigPMKLifetime = 43200;
  56 static const int dot11RSNAConfigPMKReauthThreshold = 70;
  57 static const int dot11RSNAConfigSATimeout = 60;
  58
  59
  60 static inline void wpa_auth_mic_failure_report(
  61         struct wpa_authenticator *wpa_auth, const u8 *addr)
  62 {
  63         if (wpa_auth->cb.mic_failure_report)
  64                 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
  65 }
  66
  67
  68 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
  69                                       const u8 *addr, wpa_eapol_variable var,
  70                                       int value)
  71 {
  72         if (wpa_auth->cb.set_eapol)
  73                 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
  74 }
  75
  76
  77 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
  78                                      const u8 *addr, wpa_eapol_variable var)
  79 {
  80         if (wpa_auth->cb.get_eapol == NULL)
  81                 return -1;
  82         return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
  83 }
  84
  85
  86 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
  87                                           const u8 *addr, const u8 *prev_psk)
  88 {
  89         if (wpa_auth->cb.get_psk == NULL)
  90                 return NULL;
  91         return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
  92 }
  93
  94
  95 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
  96                                    const u8 *addr, u8 *msk, size_t *len)
  97 {
  98         if (wpa_auth->cb.get_msk == NULL)
  99                 return -1;
 100         return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
 101 }
 102
 103
 104 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 105                                    int vlan_id,
 106                                    const char *alg, const u8 *addr, int idx,
 107                                    u8 *key, size_t key_len)
 108 {
 109         if (wpa_auth->cb.set_key == NULL)
 110                 return -1;
 111         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 112                                     key, key_len);
 113 }
 114
 115
 116 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 117                                       const u8 *addr, int idx, u8 *seq)
 118 {
 119         if (wpa_auth->cb.get_seqnum == NULL)
 120                 return -1;
 121         return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
 122 }
 123
 124
 125 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
 126                                            const u8 *addr, int idx, u8 *seq)
 127 {
 128         if (wpa_auth->cb.get_seqnum_igtk == NULL)
 129                 return -1;
 130         return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
 131 }
 132
 133
 134 static inline int
 135 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
 136                     const u8 *data, size_t data_len, int encrypt)
 137 {
 138         if (wpa_auth->cb.send_eapol == NULL)
 139                 return -1;
 140         return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
 141                                        encrypt);
 142 }
 143
 144
 145 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
 146                           int (*cb)(struct wpa_state_machine *sm, void *ctx),
 147                           void *cb_ctx)
 148 {
 149         if (wpa_auth->cb.for_each_sta == NULL)
 150                 return 0;
 151         return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
 152 }
 153
 154
 155 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
 156                            int (*cb)(struct wpa_authenticator *a, void *ctx),
 157                            void *cb_ctx)
 158 {
 159         if (wpa_auth->cb.for_each_auth == NULL)
 160                 return 0;
 161         return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
 162 }
 163
 164
 165 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 166                      logger_level level, const char *txt)
 167 {
 168         if (wpa_auth->cb.logger == NULL)
 169                 return;
 170         wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
 171 }
 172
 173
 174 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 175                       logger_level level, const char *fmt, ...)
 176 {
 177         char *format;
 178         int maxlen;
 179         va_list ap;
 180
 181         if (wpa_auth->cb.logger == NULL)
 182                 return;
 183
 184         maxlen = os_strlen(fmt) + 100;
 185         format = os_malloc(maxlen);
 186         if (!format)
 187                 return;
 188
 189         va_start(ap, fmt);
 190         vsnprintf(format, maxlen, fmt, ap);
 191         va_end(ap);
 192
 193         wpa_auth_logger(wpa_auth, addr, level, format);
 194
 195         os_free(format);
 196 }
 197
 198
 199 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
 200                                const u8 *addr)
 201 {
 202         if (wpa_auth->cb.disconnect == NULL)
 203                 return;
 204         wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
 205                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 206 }
 207
 208
 209 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
 210 {
 211         int ret = 0;
 212 #ifdef CONFIG_IEEE80211R
 213         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
 214                 ret = 1;
 215 #endif /* CONFIG_IEEE80211R */
 216 #ifdef CONFIG_IEEE80211W
 217         if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
 218                 ret = 1;
 219 #endif /* CONFIG_IEEE80211W */
 220         return ret;
 221 }
 222
 223
 224 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
 225 {
 226         struct wpa_authenticator *wpa_auth = eloop_ctx;
 227
 228         if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
 229                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 230                            "initialization.");
 231         } else {
 232                 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
 233         }
 234
 235         if (wpa_auth->conf.wpa_gmk_rekey) {
 236                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 237                                        wpa_rekey_gmk, wpa_auth, NULL);
 238         }
 239 }
 240
 241
 242 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
 243 {
 244         struct wpa_authenticator *wpa_auth = eloop_ctx;
 245         struct wpa_group *group;
 246
 247         wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
 248         for (group = wpa_auth->group; group; group = group->next) {
 249                 group->GTKReKey = TRUE;
 250                 do {
 251                         group->changed = FALSE;
 252                         wpa_group_sm_step(wpa_auth, group);
 253                 } while (group->changed);
 254         }
 255
 256         if (wpa_auth->conf.wpa_group_rekey) {
 257                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
 258                                        0, wpa_rekey_gtk, wpa_auth, NULL);
 259         }
 260 }
 261
 262
 263 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
 264 {
 265         if (sm->pmksa == ctx)
 266                 sm->pmksa = NULL;
 267         return 0;
 268 }
 269
 270
 271 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
 272                                    void *ctx)
 273 {
 274         struct wpa_authenticator *wpa_auth = ctx;
 275         wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
 276 }
 277
 278
 279 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
 280                                          int vlan_id)
 281 {
 282         struct wpa_group *group;
 283         u8 buf[ETH_ALEN + 8 + sizeof(group)];
 284         u8 rkey[32];
 285
 286         group = os_zalloc(sizeof(struct wpa_group));
 287         if (group == NULL)
 288                 return NULL;
 289
 290         group->GTKAuthenticator = TRUE;
 291         group->vlan_id = vlan_id;
 292
 293         switch (wpa_auth->conf.wpa_group) {
 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         /* Counter = PRF-256(Random number, "Init Counter",
 309          *                   Local MAC Address || Time)
 310          */
 311         os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
 312         wpa_get_ntp_timestamp(buf + ETH_ALEN);
 313         os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
 314         if (os_get_random(rkey, sizeof(rkey)) ||
 315             os_get_random(group->GMK, WPA_GMK_LEN)) {
 316                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 317                            "initialization.");
 318                 os_free(group);
 319                 return NULL;
 320         }
 321
 322         sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
 323                  group->Counter, WPA_NONCE_LEN);
 324
 325         group->GInit = TRUE;
 326         wpa_group_sm_step(wpa_auth, group);
 327         group->GInit = FALSE;
 328         wpa_group_sm_step(wpa_auth, group);
 329
 330         return group;
 331 }
 332
 333
 334 /**
 335  * wpa_init - Initialize WPA authenticator
 336  * @addr: Authenticator address
 337  * @conf: Configuration for WPA authenticator
 338  * Returns: Pointer to WPA authenticator data or %NULL on failure
 339  */
 340 struct wpa_authenticator * wpa_init(const u8 *addr,
 341                                     struct wpa_auth_config *conf,
 342                                     struct wpa_auth_callbacks *cb)
 343 {
 344         struct wpa_authenticator *wpa_auth;
 345
 346         wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
 347         if (wpa_auth == NULL)
 348                 return NULL;
 349         os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
 350         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 351         os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
 352
 353         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 354                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 355                 os_free(wpa_auth);
 356                 return NULL;
 357         }
 358
 359         wpa_auth->group = wpa_group_init(wpa_auth, 0);
 360         if (wpa_auth->group == NULL) {
 361                 os_free(wpa_auth->wpa_ie);
 362                 os_free(wpa_auth);
 363                 return NULL;
 364         }
 365
 366         wpa_auth->pmksa = pmksa_cache_init(wpa_auth_pmksa_free_cb, wpa_auth);
 367         if (wpa_auth->pmksa == NULL) {
 368                 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
 369                 os_free(wpa_auth->wpa_ie);
 370                 os_free(wpa_auth);
 371                 return NULL;
 372         }
 373
 374 #ifdef CONFIG_IEEE80211R
 375         wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
 376         if (wpa_auth->ft_pmk_cache == NULL) {
 377                 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
 378                 os_free(wpa_auth->wpa_ie);
 379                 pmksa_cache_deinit(wpa_auth->pmksa);
 380                 os_free(wpa_auth);
 381                 return NULL;
 382         }
 383 #endif /* CONFIG_IEEE80211R */
 384
 385         if (wpa_auth->conf.wpa_gmk_rekey) {
 386                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 387                                        wpa_rekey_gmk, wpa_auth, NULL);
 388         }
 389
 390         if (wpa_auth->conf.wpa_group_rekey) {
 391                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
 392                                        wpa_rekey_gtk, wpa_auth, NULL);
 393         }
 394
 395         return wpa_auth;
 396 }
 397
 398
 399 /**
 400  * wpa_deinit - Deinitialize WPA authenticator
 401  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 402  */
 403 void wpa_deinit(struct wpa_authenticator *wpa_auth)
 404 {
 405         struct wpa_group *group, *prev;
 406
 407         eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
 408         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
 409
 410 #ifdef CONFIG_PEERKEY
 411         while (wpa_auth->stsl_negotiations)
 412                 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
 413 #endif /* CONFIG_PEERKEY */
 414
 415         pmksa_cache_deinit(wpa_auth->pmksa);
 416
 417 #ifdef CONFIG_IEEE80211R
 418         wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
 419         wpa_auth->ft_pmk_cache = NULL;
 420 #endif /* CONFIG_IEEE80211R */
 421
 422         os_free(wpa_auth->wpa_ie);
 423
 424         group = wpa_auth->group;
 425         while (group) {
 426                 prev = group;
 427                 group = group->next;
 428                 os_free(prev);
 429         }
 430
 431         os_free(wpa_auth);
 432 }
 433
 434
 435 /**
 436  * wpa_reconfig - Update WPA authenticator configuration
 437  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 438  * @conf: Configuration for WPA authenticator
 439  */
 440 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
 441                  struct wpa_auth_config *conf)
 442 {
 443         if (wpa_auth == NULL)
 444                 return 0;
 445
 446         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 447         /*
 448          * TODO:
 449          * Disassociate stations if configuration changed
 450          * Update WPA/RSN IE
 451          */
 452         return 0;
 453 }
 454
 455
 456 struct wpa_state_machine *
 457 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
 458 {
 459         struct wpa_state_machine *sm;
 460
 461         sm = os_zalloc(sizeof(struct wpa_state_machine));
 462         if (sm == NULL)
 463                 return NULL;
 464         os_memcpy(sm->addr, addr, ETH_ALEN);
 465
 466         sm->wpa_auth = wpa_auth;
 467         sm->group = wpa_auth->group;
 468
 469         return sm;
 470 }
 471
 472
 473 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
 474                              struct wpa_state_machine *sm)
 475 {
 476         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 477                 return;
 478
 479 #ifdef CONFIG_IEEE80211R
 480         if (sm->ft_completed) {
 481                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 482                                 "FT authentication already completed - do not "
 483                                 "start 4-way handshake");
 484                 return;
 485         }
 486 #endif /* CONFIG_IEEE80211R */
 487
 488         if (sm->started) {
 489                 os_memset(sm->key_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
 490                 sm->ReAuthenticationRequest = TRUE;
 491                 wpa_sm_step(sm);
 492                 return;
 493         }
 494
 495         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 496                         "start authentication");
 497         sm->started = 1;
 498
 499         sm->Init = TRUE;
 500         wpa_sm_step(sm);
 501         sm->Init = FALSE;
 502         sm->AuthenticationRequest = TRUE;
 503         wpa_sm_step(sm);
 504 }
 505
 506
 507 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
 508 {
 509         os_free(sm->last_rx_eapol_key);
 510         os_free(sm->wpa_ie);
 511         os_free(sm);
 512 }
 513
 514
 515 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
 516 {
 517         if (sm == NULL)
 518                 return;
 519
 520         if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
 521                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
 522                                 "strict rekeying - force GTK rekey since STA "
 523                                 "is leaving");
 524                 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
 525                 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
 526                                        NULL);
 527         }
 528
 529         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
 530         eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
 531         if (sm->in_step_loop) {
 532                 /* Must not free state machine while wpa_sm_step() is running.
 533                  * Freeing will be completed in the end of wpa_sm_step(). */
 534                 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
 535                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
 536                 sm->pending_deinit = 1;
 537         } else
 538                 wpa_free_sta_sm(sm);
 539 }
 540
 541
 542 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
 543 {
 544         if (sm == NULL)
 545                 return;
 546
 547         sm->PTKRequest = TRUE;
 548         sm->PTK_valid = 0;
 549 }
 550
 551
 552 void wpa_receive(struct wpa_authenticator *wpa_auth,
 553                  struct wpa_state_machine *sm,
 554                  u8 *data, size_t data_len)
 555 {
 556         struct ieee802_1x_hdr *hdr;
 557         struct wpa_eapol_key *key;
 558         u16 key_info, key_data_length;
 559         enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
 560                SMK_M1, SMK_M3, SMK_ERROR } msg;
 561         char *msgtxt;
 562         struct wpa_eapol_ie_parse kde;
 563
 564         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 565                 return;
 566
 567         if (data_len < sizeof(*hdr) + sizeof(*key))
 568                 return;
 569
 570         hdr = (struct ieee802_1x_hdr *) data;
 571         key = (struct wpa_eapol_key *) (hdr + 1);
 572         key_info = WPA_GET_BE16(key->key_info);
 573         key_data_length = WPA_GET_BE16(key->key_data_length);
 574         if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
 575                 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
 576                            "key_data overflow (%d > %lu)",
 577                            key_data_length,
 578                            (unsigned long) (data_len - sizeof(*hdr) -
 579                                             sizeof(*key)));
 580                 return;
 581         }
 582
 583         /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
 584          * are set */
 585
 586         if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
 587             (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
 588                 if (key_info & WPA_KEY_INFO_ERROR) {
 589                         msg = SMK_ERROR;
 590                         msgtxt = "SMK Error";
 591                 } else {
 592                         msg = SMK_M1;
 593                         msgtxt = "SMK M1";
 594                 }
 595         } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
 596                 msg = SMK_M3;
 597                 msgtxt = "SMK M3";
 598         } else if (key_info & WPA_KEY_INFO_REQUEST) {
 599                 msg = REQUEST;
 600                 msgtxt = "Request";
 601         } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
 602                 msg = GROUP_2;
 603                 msgtxt = "2/2 Group";
 604         } else if (key_data_length == 0) {
 605                 msg = PAIRWISE_4;
 606                 msgtxt = "4/4 Pairwise";
 607         } else {
 608                 msg = PAIRWISE_2;
 609                 msgtxt = "2/4 Pairwise";
 610         }
 611
 612         /* TODO: key_info type validation for PeerKey */
 613         if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
 614             msg == GROUP_2) {
 615                 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
 616                 if (sm->pairwise == WPA_CIPHER_CCMP) {
 617                         if (wpa_use_aes_cmac(sm) &&
 618                             ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
 619                                 wpa_auth_logger(wpa_auth, sm->addr,
 620                                                 LOGGER_WARNING,
 621                                                 "advertised support for "
 622                                                 "AES-128-CMAC, but did not "
 623                                                 "use it");
 624                                 return;
 625                         }
 626
 627                         if (!wpa_use_aes_cmac(sm) &&
 628                             ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
 629                                 wpa_auth_logger(wpa_auth, sm->addr,
 630                                                 LOGGER_WARNING,
 631                                                 "did not use HMAC-SHA1-AES "
 632                                                 "with CCMP");
 633                                 return;
 634                         }
 635                 }
 636         }
 637
 638         if (key_info & WPA_KEY_INFO_REQUEST) {
 639                 if (sm->req_replay_counter_used &&
 640                     os_memcmp(key->replay_counter, sm->req_replay_counter,
 641                               WPA_REPLAY_COUNTER_LEN) <= 0) {
 642                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
 643                                         "received EAPOL-Key request with "
 644                                         "replayed counter");
 645                         return;
 646                 }
 647         }
 648
 649         if (!(key_info & WPA_KEY_INFO_REQUEST) &&
 650             (!sm->key_replay_counter_valid ||
 651              os_memcmp(key->replay_counter, sm->key_replay_counter,
 652                        WPA_REPLAY_COUNTER_LEN) != 0)) {
 653                 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 654                                  "received EAPOL-Key %s with unexpected "
 655                                  "replay counter", msgtxt);
 656                 wpa_hexdump(MSG_DEBUG, "expected replay counter",
 657                             sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
 658                 wpa_hexdump(MSG_DEBUG, "received replay counter",
 659                             key->replay_counter, WPA_REPLAY_COUNTER_LEN);
 660                 return;
 661         }
 662
 663         switch (msg) {
 664         case PAIRWISE_2:
 665                 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
 666                     sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
 667                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 668                                          "received EAPOL-Key msg 2/4 in "
 669                                          "invalid state (%d) - dropped",
 670                                          sm->wpa_ptk_state);
 671                         return;
 672                 }
 673                 if (sm->wpa_ie == NULL ||
 674                     sm->wpa_ie_len != key_data_length ||
 675                     os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
 676                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 677                                         "WPA IE from (Re)AssocReq did not "
 678                                         "match with msg 2/4");
 679                         if (sm->wpa_ie) {
 680                                 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
 681                                             sm->wpa_ie, sm->wpa_ie_len);
 682                         }
 683                         wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
 684                                     (u8 *) (key + 1), key_data_length);
 685                         /* MLME-DEAUTHENTICATE.request */
 686                         wpa_sta_disconnect(wpa_auth, sm->addr);
 687                         return;
 688                 }
 689                 break;
 690         case PAIRWISE_4:
 691                 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
 692                     !sm->PTK_valid) {
 693                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 694                                          "received EAPOL-Key msg 4/4 in "
 695                                          "invalid state (%d) - dropped",
 696                                          sm->wpa_ptk_state);
 697                         return;
 698                 }
 699                 break;
 700         case GROUP_2:
 701                 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
 702                     || !sm->PTK_valid) {
 703                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 704                                          "received EAPOL-Key msg 2/2 in "
 705                                          "invalid state (%d) - dropped",
 706                                          sm->wpa_ptk_group_state);
 707                         return;
 708                 }
 709                 break;
 710 #ifdef CONFIG_PEERKEY
 711         case SMK_M1:
 712         case SMK_M3:
 713         case SMK_ERROR:
 714                 if (!wpa_auth->conf.peerkey) {
 715                         wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
 716                                    "PeerKey use disabled - ignoring message");
 717                         return;
 718                 }
 719                 if (!sm->PTK_valid) {
 720                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 721                                         "received EAPOL-Key msg SMK in "
 722                                         "invalid state - dropped");
 723                         return;
 724                 }
 725                 break;
 726 #else /* CONFIG_PEERKEY */
 727         case SMK_M1:
 728         case SMK_M3:
 729         case SMK_ERROR:
 730                 return; /* STSL disabled - ignore SMK messages */
 731 #endif /* CONFIG_PEERKEY */
 732         case REQUEST:
 733                 break;
 734         }
 735
 736         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
 737                          "received EAPOL-Key frame (%s)", msgtxt);
 738
 739         if (key_info & WPA_KEY_INFO_ACK) {
 740                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 741                                 "received invalid EAPOL-Key: Key Ack set");
 742                 return;
 743         }
 744
 745         if (!(key_info & WPA_KEY_INFO_MIC)) {
 746                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 747                                 "received invalid EAPOL-Key: Key MIC not set");
 748                 return;
 749         }
 750
 751         sm->MICVerified = FALSE;
 752         if (sm->PTK_valid) {
 753                 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
 754                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 755                                         "received EAPOL-Key with invalid MIC");
 756                         return;
 757                 }
 758                 sm->MICVerified = TRUE;
 759                 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
 760         }
 761
 762         if (key_info & WPA_KEY_INFO_REQUEST) {
 763                 if (sm->MICVerified) {
 764                         sm->req_replay_counter_used = 1;
 765                         os_memcpy(sm->req_replay_counter, key->replay_counter,
 766                                   WPA_REPLAY_COUNTER_LEN);
 767                 } else {
 768                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 769                                         "received EAPOL-Key request with "
 770                                         "invalid MIC");
 771                         return;
 772                 }
 773
 774                 /*
 775                  * TODO: should decrypt key data field if encryption was used;
 776                  * even though MAC address KDE is not normally encrypted,
 777                  * supplicant is allowed to encrypt it.
 778                  */
 779                 if (msg == SMK_ERROR) {
 780 #ifdef CONFIG_PEERKEY
 781                         wpa_smk_error(wpa_auth, sm, key);
 782 #endif /* CONFIG_PEERKEY */
 783                         return;
 784                 } else if (key_info & WPA_KEY_INFO_ERROR) {
 785                         /* Supplicant reported a Michael MIC error */
 786                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 787                                         "received EAPOL-Key Error Request "
 788                                         "(STA detected Michael MIC failure)");
 789                         wpa_auth_mic_failure_report(wpa_auth, sm->addr);
 790                         sm->dot11RSNAStatsTKIPRemoteMICFailures++;
 791                         wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
 792                         /* Error report is not a request for a new key
 793                          * handshake, but since Authenticator may do it, let's
 794                          * change the keys now anyway. */
 795                         wpa_request_new_ptk(sm);
 796                 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
 797                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 798                                         "received EAPOL-Key Request for new "
 799                                         "4-Way Handshake");
 800                         wpa_request_new_ptk(sm);
 801 #ifdef CONFIG_PEERKEY
 802                 } else if (msg == SMK_M1) {
 803                         wpa_smk_m1(wpa_auth, sm, key);
 804 #endif /* CONFIG_PEERKEY */
 805                 } else if (key_data_length > 0 &&
 806                            wpa_parse_kde_ies((const u8 *) (key + 1),
 807                                              key_data_length, &kde) == 0 &&
 808                            kde.mac_addr) {
 809                 } else {
 810                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 811                                         "received EAPOL-Key Request for GTK "
 812                                         "rekeying");
 813                         /* FIX: why was this triggering PTK rekeying for the
 814                          * STA that requested Group Key rekeying?? */
 815                         /* wpa_request_new_ptk(sta->wpa_sm); */
 816                         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
 817                         wpa_rekey_gtk(wpa_auth, NULL);
 818                 }
 819         } else {
 820                 /* Do not allow the same key replay counter to be reused. */
 821                 sm->key_replay_counter_valid = FALSE;
 822         }
 823
 824 #ifdef CONFIG_PEERKEY
 825         if (msg == SMK_M3) {
 826                 wpa_smk_m3(wpa_auth, sm, key);
 827                 return;
 828         }
 829 #endif /* CONFIG_PEERKEY */
 830
 831         os_free(sm->last_rx_eapol_key);
 832         sm->last_rx_eapol_key = os_malloc(data_len);
 833         if (sm->last_rx_eapol_key == NULL)
 834                 return;
 835         os_memcpy(sm->last_rx_eapol_key, data, data_len);
 836         sm->last_rx_eapol_key_len = data_len;
 837
 838         sm->EAPOLKeyReceived = TRUE;
 839         sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
 840         sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
 841         os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
 842         wpa_sm_step(sm);
 843 }
 844
 845
 846 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
 847                            u8 *gtk, size_t gtk_len)
 848 {
 849         u8 data[ETH_ALEN + WPA_NONCE_LEN];
 850
 851         /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
 852         os_memcpy(data, addr, ETH_ALEN);
 853         os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
 854
 855 #ifdef CONFIG_IEEE80211W
 856         sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
 857                    data, sizeof(data), gtk, gtk_len);
 858 #else /* CONFIG_IEEE80211W */
 859         sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
 860                  data, sizeof(data), gtk, gtk_len);
 861 #endif /* CONFIG_IEEE80211W */
 862
 863         wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
 864         wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
 865 }
 866
 867
 868 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
 869 {
 870         struct wpa_authenticator *wpa_auth = eloop_ctx;
 871         struct wpa_state_machine *sm = timeout_ctx;
 872
 873         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
 874         sm->TimeoutEvt = TRUE;
 875         wpa_sm_step(sm);
 876 }
 877
 878
 879 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
 880                       struct wpa_state_machine *sm, int key_info,
 881                       const u8 *key_rsc, const u8 *nonce,
 882                       const u8 *kde, size_t kde_len,
 883                       int keyidx, int encr, int force_version)
 884 {
 885         struct ieee802_1x_hdr *hdr;
 886         struct wpa_eapol_key *key;
 887         size_t len;
 888         int alg;
 889         int key_data_len, pad_len = 0;
 890         u8 *buf, *pos;
 891         int version, pairwise;
 892
 893         len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
 894
 895         if (force_version)
 896                 version = force_version;
 897         else if (wpa_use_aes_cmac(sm))
 898                 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
 899         else if (sm->pairwise == WPA_CIPHER_CCMP)
 900                 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
 901         else
 902                 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
 903
 904         pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
 905
 906         wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
 907                    "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
 908                    "encr=%d)",
 909                    version,
 910                    (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
 911                    (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
 912                    (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
 913                    (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
 914                    pairwise, (unsigned long) kde_len, keyidx, encr);
 915
 916         key_data_len = kde_len;
 917
 918         if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
 919              version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
 920                 pad_len = key_data_len % 8;
 921                 if (pad_len)
 922                         pad_len = 8 - pad_len;
 923                 key_data_len += pad_len + 8;
 924         }
 925
 926         len += key_data_len;
 927
 928         hdr = os_zalloc(len);
 929         if (hdr == NULL)
 930                 return;
 931         hdr->version = wpa_auth->conf.eapol_version;
 932         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 933         hdr->length = host_to_be16(len  - sizeof(*hdr));
 934         key = (struct wpa_eapol_key *) (hdr + 1);
 935
 936         key->type = sm->wpa == WPA_VERSION_WPA2 ?
 937                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
 938         key_info |= version;
 939         if (encr && sm->wpa == WPA_VERSION_WPA2)
 940                 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
 941         if (sm->wpa != WPA_VERSION_WPA2)
 942                 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
 943         WPA_PUT_BE16(key->key_info, key_info);
 944
 945         alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
 946         switch (alg) {
 947         case WPA_CIPHER_CCMP:
 948                 WPA_PUT_BE16(key->key_length, 16);
 949                 break;
 950         case WPA_CIPHER_TKIP:
 951                 WPA_PUT_BE16(key->key_length, 32);
 952                 break;
 953         case WPA_CIPHER_WEP40:
 954                 WPA_PUT_BE16(key->key_length, 5);
 955                 break;
 956         case WPA_CIPHER_WEP104:
 957                 WPA_PUT_BE16(key->key_length, 13);
 958                 break;
 959         }
 960         if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
 961                 WPA_PUT_BE16(key->key_length, 0);
 962
 963         /* FIX: STSL: what to use as key_replay_counter? */
 964         inc_byte_array(sm->key_replay_counter, WPA_REPLAY_COUNTER_LEN);
 965         os_memcpy(key->replay_counter, sm->key_replay_counter,
 966                   WPA_REPLAY_COUNTER_LEN);
 967         sm->key_replay_counter_valid = TRUE;
 968
 969         if (nonce)
 970                 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
 971
 972         if (key_rsc)
 973                 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
 974
 975         if (kde && !encr) {
 976                 os_memcpy(key + 1, kde, kde_len);
 977                 WPA_PUT_BE16(key->key_data_length, kde_len);
 978         } else if (encr && kde) {
 979                 buf = os_zalloc(key_data_len);
 980                 if (buf == NULL) {
 981                         os_free(hdr);
 982                         return;
 983                 }
 984                 pos = buf;
 985                 os_memcpy(pos, kde, kde_len);
 986                 pos += kde_len;
 987
 988                 if (pad_len)
 989                         *pos++ = 0xdd;
 990
 991                 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
 992                                 buf, key_data_len);
 993                 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
 994                     version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
 995                         if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
 996                                      (u8 *) (key + 1))) {
 997                                 os_free(hdr);
 998                                 os_free(buf);
 999                                 return;
1000                         }
1001                         WPA_PUT_BE16(key->key_data_length, key_data_len);
1002                 } else {
1003                         u8 ek[32];
1004                         os_memcpy(key->key_iv,
1005                                   sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1006                         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1007                         os_memcpy(ek, key->key_iv, 16);
1008                         os_memcpy(ek + 16, sm->PTK.kek, 16);
1009                         os_memcpy(key + 1, buf, key_data_len);
1010                         rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1011                         WPA_PUT_BE16(key->key_data_length, key_data_len);
1012                 }
1013                 os_free(buf);
1014         }
1015
1016         if (key_info & WPA_KEY_INFO_MIC) {
1017                 if (!sm->PTK_valid) {
1018                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1019                                         "PTK not valid when sending EAPOL-Key "
1020                                         "frame");
1021                         os_free(hdr);
1022                         return;
1023                 }
1024                 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1025                                   key->key_mic);
1026         }
1027
1028         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1029                            1);
1030         wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1031                             sm->pairwise_set);
1032         os_free(hdr);
1033 }
1034
1035
1036 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1037                            struct wpa_state_machine *sm, int key_info,
1038                            const u8 *key_rsc, const u8 *nonce,
1039                            const u8 *kde, size_t kde_len,
1040                            int keyidx, int encr)
1041 {
1042         int timeout_ms;
1043         int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1044
1045         if (sm == NULL)
1046                 return;
1047
1048         __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1049                          keyidx, encr, 0);
1050
1051         timeout_ms = pairwise ? dot11RSNAConfigPairwiseUpdateTimeOut :
1052                 dot11RSNAConfigGroupUpdateTimeOut;
1053         eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1054                                wpa_send_eapol_timeout, wpa_auth, sm);
1055 }
1056
1057
1058 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1059 {
1060         struct ieee802_1x_hdr *hdr;
1061         struct wpa_eapol_key *key;
1062         u16 key_info;
1063         int ret = 0;
1064         u8 mic[16];
1065
1066         if (data_len < sizeof(*hdr) + sizeof(*key))
1067                 return -1;
1068
1069         hdr = (struct ieee802_1x_hdr *) data;
1070         key = (struct wpa_eapol_key *) (hdr + 1);
1071         key_info = WPA_GET_BE16(key->key_info);
1072         os_memcpy(mic, key->key_mic, 16);
1073         os_memset(key->key_mic, 0, 16);
1074         if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1075                               data, data_len, key->key_mic) ||
1076             os_memcmp(mic, key->key_mic, 16) != 0)
1077                 ret = -1;
1078         os_memcpy(key->key_mic, mic, 16);
1079         return ret;
1080 }
1081
1082
1083 void wpa_remove_ptk(struct wpa_state_machine *sm)
1084 {
1085         sm->PTK_valid = FALSE;
1086         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1087         wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1088         sm->pairwise_set = FALSE;
1089 }
1090
1091
1092 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1093 {
1094         int remove_ptk = 1;
1095
1096         if (sm == NULL)
1097                 return;
1098
1099         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1100                          "event %d notification", event);
1101
1102         switch (event) {
1103         case WPA_AUTH:
1104         case WPA_ASSOC:
1105                 break;
1106         case WPA_DEAUTH:
1107         case WPA_DISASSOC:
1108                 sm->DeauthenticationRequest = TRUE;
1109                 break;
1110         case WPA_REAUTH:
1111         case WPA_REAUTH_EAPOL:
1112                 sm->ReAuthenticationRequest = TRUE;
1113                 break;
1114         case WPA_ASSOC_FT:
1115 #ifdef CONFIG_IEEE80211R
1116                 /* Using FT protocol, not WPA auth state machine */
1117                 sm->ft_completed = 1;
1118                 return;
1119 #else /* CONFIG_IEEE80211R */
1120                 break;
1121 #endif /* CONFIG_IEEE80211R */
1122         }
1123
1124 #ifdef CONFIG_IEEE80211R
1125         sm->ft_completed = 0;
1126 #endif /* CONFIG_IEEE80211R */
1127
1128 #ifdef CONFIG_IEEE80211W
1129         if (sm->mgmt_frame_prot && event == WPA_AUTH)
1130                 remove_ptk = 0;
1131 #endif /* CONFIG_IEEE80211W */
1132
1133         if (remove_ptk) {
1134                 sm->PTK_valid = FALSE;
1135                 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1136
1137                 if (event != WPA_REAUTH_EAPOL)
1138                         wpa_remove_ptk(sm);
1139         }
1140
1141         wpa_sm_step(sm);
1142 }
1143
1144
1145 static const char * wpa_alg_txt(int alg)
1146 {
1147         switch (alg) {
1148         case WPA_CIPHER_CCMP:
1149                 return "CCMP";
1150         case WPA_CIPHER_TKIP:
1151                 return "TKIP";
1152         case WPA_CIPHER_WEP104:
1153         case WPA_CIPHER_WEP40:
1154                 return "WEP";
1155         default:
1156                 return "";
1157         }
1158 }
1159
1160
1161 SM_STATE(WPA_PTK, INITIALIZE)
1162 {
1163         SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1164         if (sm->Init) {
1165                 /* Init flag is not cleared here, so avoid busy
1166                  * loop by claiming nothing changed. */
1167                 sm->changed = FALSE;
1168         }
1169
1170         sm->keycount = 0;
1171         if (sm->GUpdateStationKeys)
1172                 sm->group->GKeyDoneStations--;
1173         sm->GUpdateStationKeys = FALSE;
1174         if (sm->wpa == WPA_VERSION_WPA)
1175                 sm->PInitAKeys = FALSE;
1176         if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1177                * Local AA > Remote AA)) */) {
1178                 sm->Pair = TRUE;
1179         }
1180         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1181         wpa_remove_ptk(sm);
1182         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1183         sm->TimeoutCtr = 0;
1184         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1185                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1186                                    WPA_EAPOL_authorized, 0);
1187         }
1188 }
1189
1190
1191 SM_STATE(WPA_PTK, DISCONNECT)
1192 {
1193         SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1194         sm->Disconnect = FALSE;
1195         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1196 }
1197
1198
1199 SM_STATE(WPA_PTK, DISCONNECTED)
1200 {
1201         SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1202         sm->DeauthenticationRequest = FALSE;
1203 }
1204
1205
1206 SM_STATE(WPA_PTK, AUTHENTICATION)
1207 {
1208         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1209         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1210         sm->PTK_valid = FALSE;
1211         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1212                            1);
1213         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1214         sm->AuthenticationRequest = FALSE;
1215 }
1216
1217
1218 SM_STATE(WPA_PTK, AUTHENTICATION2)
1219 {
1220         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1221         os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1222         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1223         sm->ReAuthenticationRequest = FALSE;
1224         /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1225          * logical place than INITIALIZE since AUTHENTICATION2 can be
1226          * re-entered on ReAuthenticationRequest without going through
1227          * INITIALIZE. */
1228         sm->TimeoutCtr = 0;
1229 }
1230
1231
1232 SM_STATE(WPA_PTK, INITPMK)
1233 {
1234         u8 msk[2 * PMK_LEN];
1235         size_t len = 2 * PMK_LEN;
1236
1237         SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1238 #ifdef CONFIG_IEEE80211R
1239         sm->xxkey_len = 0;
1240 #endif /* CONFIG_IEEE80211R */
1241         if (sm->pmksa) {
1242                 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1243                 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1244         } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1245                 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1246                            "(len=%lu)", (unsigned long) len);
1247                 os_memcpy(sm->PMK, msk, PMK_LEN);
1248 #ifdef CONFIG_IEEE80211R
1249                 if (len >= 2 * PMK_LEN) {
1250                         os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1251                         sm->xxkey_len = PMK_LEN;
1252                 }
1253 #endif /* CONFIG_IEEE80211R */
1254         } else {
1255                 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1256         }
1257
1258         sm->req_replay_counter_used = 0;
1259         /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1260          * will break reauthentication since EAPOL state machines may not be
1261          * get into AUTHENTICATING state that clears keyRun before WPA state
1262          * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1263          * state and takes PMK from the previously used AAA Key. This will
1264          * eventually fail in 4-Way Handshake because Supplicant uses PMK
1265          * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1266          * be good workaround for this issue. */
1267         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1268 }
1269
1270
1271 SM_STATE(WPA_PTK, INITPSK)
1272 {
1273         const u8 *psk;
1274         SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1275         psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1276         if (psk) {
1277                 os_memcpy(sm->PMK, psk, PMK_LEN);
1278 #ifdef CONFIG_IEEE80211R
1279                 os_memcpy(sm->xxkey, psk, PMK_LEN);
1280                 sm->xxkey_len = PMK_LEN;
1281 #endif /* CONFIG_IEEE80211R */
1282         }
1283         sm->req_replay_counter_used = 0;
1284 }
1285
1286
1287 SM_STATE(WPA_PTK, PTKSTART)
1288 {
1289         u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1290         size_t pmkid_len = 0;
1291
1292         SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1293         sm->PTKRequest = FALSE;
1294         sm->TimeoutEvt = FALSE;
1295         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1296                         "sending 1/4 msg of 4-Way Handshake");
1297         /*
1298          * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1299          * one possible PSK for this STA.
1300          */
1301         if (sm->wpa == WPA_VERSION_WPA2 &&
1302             wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1303                 pmkid = buf;
1304                 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1305                 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1306                 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1307                 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1308                 if (sm->pmksa)
1309                         os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1310                                   sm->pmksa->pmkid, PMKID_LEN);
1311                 else {
1312                         /*
1313                          * Calculate PMKID since no PMKSA cache entry was
1314                          * available with pre-calculated PMKID.
1315                          */
1316                         rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1317                                   sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1318                                   wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1319                 }
1320         }
1321         wpa_send_eapol(sm->wpa_auth, sm,
1322                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1323                        sm->ANonce, pmkid, pmkid_len, 0, 0);
1324         sm->TimeoutCtr++;
1325 }
1326
1327
1328 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1329                           struct wpa_ptk *ptk)
1330 {
1331 #ifdef CONFIG_IEEE80211R
1332         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1333                 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1334 #endif /* CONFIG_IEEE80211R */
1335
1336         wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1337                        sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1338                        (u8 *) ptk, sizeof(*ptk),
1339                        wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1340
1341         return 0;
1342 }
1343
1344
1345 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1346 {
1347         struct wpa_ptk PTK;
1348         int ok = 0;
1349         const u8 *pmk = NULL;
1350
1351         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1352         sm->EAPOLKeyReceived = FALSE;
1353
1354         /* WPA with IEEE 802.1X: use the derived PMK from EAP
1355          * WPA-PSK: iterate through possible PSKs and select the one matching
1356          * the packet */
1357         for (;;) {
1358                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1359                         pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1360                         if (pmk == NULL)
1361                                 break;
1362                 } else
1363                         pmk = sm->PMK;
1364
1365                 wpa_derive_ptk(sm, pmk, &PTK);
1366
1367                 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1368                                        sm->last_rx_eapol_key_len) == 0) {
1369                         ok = 1;
1370                         break;
1371                 }
1372
1373                 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1374                         break;
1375         }
1376
1377         if (!ok) {
1378                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1379                                 "invalid MIC in msg 2/4 of 4-Way Handshake");
1380                 return;
1381         }
1382
1383         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1384
1385         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1386                 /* PSK may have changed from the previous choice, so update
1387                  * state machine data based on whatever PSK was selected here.
1388                  */
1389                 os_memcpy(sm->PMK, pmk, PMK_LEN);
1390         }
1391
1392         sm->MICVerified = TRUE;
1393
1394         os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1395         sm->PTK_valid = TRUE;
1396 }
1397
1398
1399 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1400 {
1401         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1402         sm->TimeoutCtr = 0;
1403 }
1404
1405
1406 #ifdef CONFIG_IEEE80211W
1407
1408 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1409 {
1410         if (sm->mgmt_frame_prot) {
1411                 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1412         }
1413
1414         return 0;
1415 }
1416
1417
1418 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1419 {
1420         struct wpa_igtk_kde igtk;
1421         struct wpa_group *gsm = sm->group;
1422
1423         if (!sm->mgmt_frame_prot)
1424                 return pos;
1425
1426         igtk.keyid[0] = gsm->GN_igtk;
1427         igtk.keyid[1] = 0;
1428         if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1429             < 0)
1430                 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1431         os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1432         pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1433                           (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1434
1435         return pos;
1436 }
1437
1438 #else /* CONFIG_IEEE80211W */
1439
1440 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1441 {
1442         return 0;
1443 }
1444
1445
1446 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1447 {
1448         return pos;
1449 }
1450
1451 #endif /* CONFIG_IEEE80211W */
1452
1453
1454 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1455 {
1456         u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1457         size_t gtk_len, kde_len;
1458         struct wpa_group *gsm = sm->group;
1459         u8 *wpa_ie;
1460         int wpa_ie_len, secure, keyidx, encr = 0;
1461
1462         SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1463         sm->TimeoutEvt = FALSE;
1464         /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1465          */
1466         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1467         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1468         wpa_ie = sm->wpa_auth->wpa_ie;
1469         wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1470         if (sm->wpa == WPA_VERSION_WPA &&
1471             (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1472             wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1473                 /* WPA-only STA, remove RSN IE */
1474                 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1475                 wpa_ie_len = wpa_ie[1] + 2;
1476         }
1477         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1478                         "sending 3/4 msg of 4-Way Handshake");
1479         if (sm->wpa == WPA_VERSION_WPA2) {
1480                 /* WPA2 send GTK in the 4-way handshake */
1481                 secure = 1;
1482                 gtk = gsm->GTK[gsm->GN - 1];
1483                 gtk_len = gsm->GTK_len;
1484                 keyidx = gsm->GN;
1485                 _rsc = rsc;
1486                 encr = 1;
1487         } else {
1488                 /* WPA does not include GTK in msg 3/4 */
1489                 secure = 0;
1490                 gtk = NULL;
1491                 gtk_len = 0;
1492                 keyidx = 0;
1493                 _rsc = NULL;
1494         }
1495
1496         kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1497         if (gtk)
1498                 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1499         kde = os_malloc(kde_len);
1500         if (kde == NULL)
1501                 return;
1502
1503         pos = kde;
1504         os_memcpy(pos, wpa_ie, wpa_ie_len);
1505         pos += wpa_ie_len;
1506         if (gtk) {
1507                 u8 hdr[2];
1508                 hdr[0] = keyidx & 0x03;
1509                 hdr[1] = 0;
1510                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1511                                   gtk, gtk_len);
1512         }
1513         pos = ieee80211w_kde_add(sm, pos);
1514
1515         wpa_send_eapol(sm->wpa_auth, sm,
1516                        (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1517                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1518                        WPA_KEY_INFO_KEY_TYPE,
1519                        _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1520         os_free(kde);
1521         sm->TimeoutCtr++;
1522 }
1523
1524
1525 SM_STATE(WPA_PTK, PTKINITDONE)
1526 {
1527         SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1528         sm->EAPOLKeyReceived = FALSE;
1529         if (sm->Pair) {
1530                 char *alg;
1531                 int klen;
1532                 if (sm->pairwise == WPA_CIPHER_TKIP) {
1533                         alg = "TKIP";
1534                         klen = 32;
1535                 } else {
1536                         alg = "CCMP";
1537                         klen = 16;
1538                 }
1539                 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1540                                      sm->PTK.tk1, klen)) {
1541                         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1542                         return;
1543                 }
1544                 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1545                 sm->pairwise_set = TRUE;
1546
1547                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1548                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1549                                            WPA_EAPOL_authorized, 1);
1550                 }
1551         }
1552
1553         if (0 /* IBSS == TRUE */) {
1554                 sm->keycount++;
1555                 if (sm->keycount == 2) {
1556                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1557                                            WPA_EAPOL_portValid, 1);
1558                 }
1559         } else {
1560                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1561                                    1);
1562         }
1563         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1564         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1565         if (sm->wpa == WPA_VERSION_WPA)
1566                 sm->PInitAKeys = TRUE;
1567         else
1568                 sm->has_GTK = TRUE;
1569         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1570                          "pairwise key handshake completed (%s)",
1571                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1572
1573 #ifdef CONFIG_IEEE80211R
1574         wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1575 #endif /* CONFIG_IEEE80211R */
1576 }
1577
1578
1579 SM_STEP(WPA_PTK)
1580 {
1581         struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1582
1583         if (sm->Init)
1584                 SM_ENTER(WPA_PTK, INITIALIZE);
1585         else if (sm->Disconnect
1586                  /* || FIX: dot11RSNAConfigSALifetime timeout */)
1587                 SM_ENTER(WPA_PTK, DISCONNECT);
1588         else if (sm->DeauthenticationRequest)
1589                 SM_ENTER(WPA_PTK, DISCONNECTED);
1590         else if (sm->AuthenticationRequest)
1591                 SM_ENTER(WPA_PTK, AUTHENTICATION);
1592         else if (sm->ReAuthenticationRequest)
1593                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1594         else if (sm->PTKRequest)
1595                 SM_ENTER(WPA_PTK, PTKSTART);
1596         else switch (sm->wpa_ptk_state) {
1597         case WPA_PTK_INITIALIZE:
1598                 break;
1599         case WPA_PTK_DISCONNECT:
1600                 SM_ENTER(WPA_PTK, DISCONNECTED);
1601                 break;
1602         case WPA_PTK_DISCONNECTED:
1603                 SM_ENTER(WPA_PTK, INITIALIZE);
1604                 break;
1605         case WPA_PTK_AUTHENTICATION:
1606                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1607                 break;
1608         case WPA_PTK_AUTHENTICATION2:
1609                 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1610                     wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1611                                        WPA_EAPOL_keyRun) > 0)
1612                         SM_ENTER(WPA_PTK, INITPMK);
1613                 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1614                          /* FIX: && 802.1X::keyRun */)
1615                         SM_ENTER(WPA_PTK, INITPSK);
1616                 break;
1617         case WPA_PTK_INITPMK:
1618                 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1619                                        WPA_EAPOL_keyAvailable) > 0)
1620                         SM_ENTER(WPA_PTK, PTKSTART);
1621                 else {
1622                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1623                         SM_ENTER(WPA_PTK, DISCONNECT);
1624                 }
1625                 break;
1626         case WPA_PTK_INITPSK:
1627                 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1628                         SM_ENTER(WPA_PTK, PTKSTART);
1629                 else {
1630                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1631                                         "no PSK configured for the STA");
1632                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1633                         SM_ENTER(WPA_PTK, DISCONNECT);
1634                 }
1635                 break;
1636         case WPA_PTK_PTKSTART:
1637                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1638                     sm->EAPOLKeyPairwise)
1639                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1640                 else if (sm->TimeoutCtr >
1641                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1642                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1643                         SM_ENTER(WPA_PTK, DISCONNECT);
1644                 } else if (sm->TimeoutEvt)
1645                         SM_ENTER(WPA_PTK, PTKSTART);
1646                 break;
1647         case WPA_PTK_PTKCALCNEGOTIATING:
1648                 if (sm->MICVerified)
1649                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1650                 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1651                          sm->EAPOLKeyPairwise)
1652                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1653                 else if (sm->TimeoutEvt)
1654                         SM_ENTER(WPA_PTK, PTKSTART);
1655                 break;
1656         case WPA_PTK_PTKCALCNEGOTIATING2:
1657                 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1658                 break;
1659         case WPA_PTK_PTKINITNEGOTIATING:
1660                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1661                     sm->EAPOLKeyPairwise && sm->MICVerified)
1662                         SM_ENTER(WPA_PTK, PTKINITDONE);
1663                 else if (sm->TimeoutCtr >
1664                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1665                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1666                         SM_ENTER(WPA_PTK, DISCONNECT);
1667                 } else if (sm->TimeoutEvt)
1668                         SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1669                 break;
1670         case WPA_PTK_PTKINITDONE:
1671                 break;
1672         }
1673 }
1674
1675
1676 SM_STATE(WPA_PTK_GROUP, IDLE)
1677 {
1678         SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1679         if (sm->Init) {
1680                 /* Init flag is not cleared here, so avoid busy
1681                  * loop by claiming nothing changed. */
1682                 sm->changed = FALSE;
1683         }
1684         sm->GTimeoutCtr = 0;
1685 }
1686
1687
1688 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1689 {
1690         u8 rsc[WPA_KEY_RSC_LEN];
1691         struct wpa_group *gsm = sm->group;
1692         u8 *kde, *pos, hdr[2];
1693         size_t kde_len;
1694
1695         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1696         if (sm->wpa == WPA_VERSION_WPA)
1697                 sm->PInitAKeys = FALSE;
1698         sm->TimeoutEvt = FALSE;
1699         /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1700         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1701         if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1702                 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1703         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1704                         "sending 1/2 msg of Group Key Handshake");
1705
1706         if (sm->wpa == WPA_VERSION_WPA2) {
1707                 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1708                         ieee80211w_kde_len(sm);
1709                 kde = os_malloc(kde_len);
1710                 if (kde == NULL)
1711                         return;
1712
1713                 pos = kde;
1714                 hdr[0] = gsm->GN & 0x03;
1715                 hdr[1] = 0;
1716                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1717                                   gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1718                 pos = ieee80211w_kde_add(sm, pos);
1719         } else {
1720                 kde = gsm->GTK[gsm->GN - 1];
1721                 pos = kde + gsm->GTK_len;
1722         }
1723
1724         wpa_send_eapol(sm->wpa_auth, sm,
1725                        WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1726                        WPA_KEY_INFO_ACK |
1727                        (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1728                        rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1729         if (sm->wpa == WPA_VERSION_WPA2)
1730                 os_free(kde);
1731         sm->GTimeoutCtr++;
1732 }
1733
1734
1735 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1736 {
1737         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1738         sm->EAPOLKeyReceived = FALSE;
1739         if (sm->GUpdateStationKeys)
1740                 sm->group->GKeyDoneStations--;
1741         sm->GUpdateStationKeys = FALSE;
1742         sm->GTimeoutCtr = 0;
1743         /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1744         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1745                          "group key handshake completed (%s)",
1746                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1747         sm->has_GTK = TRUE;
1748 }
1749
1750
1751 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1752 {
1753         SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1754         if (sm->GUpdateStationKeys)
1755                 sm->group->GKeyDoneStations--;
1756         sm->GUpdateStationKeys = FALSE;
1757         sm->Disconnect = TRUE;
1758 }
1759
1760
1761 SM_STEP(WPA_PTK_GROUP)
1762 {
1763         if (sm->Init)
1764                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1765         else switch (sm->wpa_ptk_group_state) {
1766         case WPA_PTK_GROUP_IDLE:
1767                 if (sm->GUpdateStationKeys ||
1768                     (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1769                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1770                 break;
1771         case WPA_PTK_GROUP_REKEYNEGOTIATING:
1772                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1773                     !sm->EAPOLKeyPairwise && sm->MICVerified)
1774                         SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1775                 else if (sm->GTimeoutCtr >
1776                          (int) dot11RSNAConfigGroupUpdateCount)
1777                         SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1778                 else if (sm->TimeoutEvt)
1779                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1780                 break;
1781         case WPA_PTK_GROUP_KEYERROR:
1782                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1783                 break;
1784         case WPA_PTK_GROUP_REKEYESTABLISHED:
1785                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1786                 break;
1787         }
1788 }
1789
1790
1791 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1792                           struct wpa_group *group)
1793 {
1794         int ret = 0;
1795
1796         /* FIX: is this the correct way of getting GNonce? */
1797         os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1798         inc_byte_array(group->Counter, WPA_NONCE_LEN);
1799         wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1800                        group->GTK[group->GN - 1], group->GTK_len);
1801
1802 #ifdef CONFIG_IEEE80211W
1803         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1804                 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1805                                   WPA_IGTK_LEN) < 0) {
1806                         wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1807                                    "IGTK");
1808                         ret = -1;
1809                 }
1810                 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1811                                 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1812         }
1813 #endif /* CONFIG_IEEE80211W */
1814
1815         return ret;
1816 }
1817
1818
1819 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1820                                struct wpa_group *group)
1821 {
1822         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1823                    "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1824         group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1825         group->wpa_group_state = WPA_GROUP_GTK_INIT;
1826
1827         /* GTK[0..N] = 0 */
1828         os_memset(group->GTK, 0, sizeof(group->GTK));
1829         group->GN = 1;
1830         group->GM = 2;
1831 #ifdef CONFIG_IEEE80211W
1832         group->GN_igtk = 4;
1833         group->GM_igtk = 5;
1834 #endif /* CONFIG_IEEE80211W */
1835         /* GTK[GN] = CalcGTK() */
1836         wpa_gtk_update(wpa_auth, group);
1837 }
1838
1839
1840 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1841 {
1842         if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1843                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1844                                 "Not in PTKINITDONE; skip Group Key update");
1845                 return 0;
1846         }
1847         sm->group->GKeyDoneStations++;
1848         sm->GUpdateStationKeys = TRUE;
1849         wpa_sm_step(sm);
1850         return 0;
1851 }
1852
1853
1854 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1855                               struct wpa_group *group)
1856 {
1857         int tmp;
1858
1859         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1860                    "SETKEYS (VLAN-ID %d)", group->vlan_id);
1861         group->changed = TRUE;
1862         group->wpa_group_state = WPA_GROUP_SETKEYS;
1863         group->GTKReKey = FALSE;
1864         tmp = group->GM;
1865         group->GM = group->GN;
1866         group->GN = tmp;
1867 #ifdef CONFIG_IEEE80211W
1868         tmp = group->GM_igtk;
1869         group->GM_igtk = group->GN_igtk;
1870         group->GN_igtk = tmp;
1871 #endif /* CONFIG_IEEE80211W */
1872         /* "GKeyDoneStations = GNoStations" is done in more robust way by
1873          * counting the STAs that are marked with GUpdateStationKeys instead of
1874          * including all STAs that could be in not-yet-completed state. */
1875         wpa_gtk_update(wpa_auth, group);
1876
1877         wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1878         wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1879                    group->GKeyDoneStations);
1880 }
1881
1882
1883 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1884                                   struct wpa_group *group)
1885 {
1886         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1887                    "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1888         group->changed = TRUE;
1889         group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1890         wpa_auth_set_key(wpa_auth, group->vlan_id,
1891                          wpa_alg_txt(wpa_auth->conf.wpa_group),
1892                          NULL, group->GN, group->GTK[group->GN - 1],
1893                          group->GTK_len);
1894
1895 #ifdef CONFIG_IEEE80211W
1896         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1897                 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
1898                                  NULL, group->GN_igtk,
1899                                  group->IGTK[group->GN_igtk - 4],
1900                                  WPA_IGTK_LEN);
1901         }
1902 #endif /* CONFIG_IEEE80211W */
1903 }
1904
1905
1906 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
1907                               struct wpa_group *group)
1908 {
1909         if (group->GInit) {
1910                 wpa_group_gtk_init(wpa_auth, group);
1911         } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
1912                    group->GTKAuthenticator) {
1913                 wpa_group_setkeysdone(wpa_auth, group);
1914         } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
1915                    group->GTKReKey) {
1916                 wpa_group_setkeys(wpa_auth, group);
1917         } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
1918                 if (group->GKeyDoneStations == 0)
1919                         wpa_group_setkeysdone(wpa_auth, group);
1920                 else if (group->GTKReKey)
1921                         wpa_group_setkeys(wpa_auth, group);
1922         }
1923 }
1924
1925
1926 static void wpa_sm_step(struct wpa_state_machine *sm)
1927 {
1928         if (sm == NULL)
1929                 return;
1930
1931         if (sm->in_step_loop) {
1932                 /* This should not happen, but if it does, make sure we do not
1933                  * end up freeing the state machine too early by exiting the
1934                  * recursive call. */
1935                 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
1936                 return;
1937         }
1938
1939         sm->in_step_loop = 1;
1940         do {
1941                 if (sm->pending_deinit)
1942                         break;
1943
1944                 sm->changed = FALSE;
1945                 sm->wpa_auth->group->changed = FALSE;
1946
1947                 SM_STEP_RUN(WPA_PTK);
1948                 if (sm->pending_deinit)
1949                         break;
1950                 SM_STEP_RUN(WPA_PTK_GROUP);
1951                 if (sm->pending_deinit)
1952                         break;
1953                 wpa_group_sm_step(sm->wpa_auth, sm->group);
1954         } while (sm->changed || sm->wpa_auth->group->changed);
1955         sm->in_step_loop = 0;
1956
1957         if (sm->pending_deinit) {
1958                 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
1959                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
1960                 wpa_free_sta_sm(sm);
1961         }
1962 }
1963
1964
1965 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
1966 {
1967         struct wpa_state_machine *sm = eloop_ctx;
1968         wpa_sm_step(sm);
1969 }
1970
1971
1972 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
1973 {
1974         if (sm == NULL)
1975                 return;
1976         eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
1977 }
1978
1979
1980 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
1981 {
1982         int tmp, i;
1983         struct wpa_group *group;
1984
1985         if (wpa_auth == NULL)
1986                 return;
1987
1988         group = wpa_auth->group;
1989
1990         for (i = 0; i < 2; i++) {
1991                 tmp = group->GM;
1992                 group->GM = group->GN;
1993                 group->GN = tmp;
1994 #ifdef CONFIG_IEEE80211W
1995                 tmp = group->GM_igtk;
1996                 group->GM_igtk = group->GN_igtk;
1997                 group->GN_igtk = tmp;
1998 #endif /* CONFIG_IEEE80211W */
1999                 wpa_gtk_update(wpa_auth, group);
2000         }
2001 }
2002
2003
2004 static const char * wpa_bool_txt(int bool)
2005 {
2006         return bool ? "TRUE" : "FALSE";
2007 }
2008
2009
2010 static int wpa_cipher_bits(int cipher)
2011 {
2012         switch (cipher) {
2013         case WPA_CIPHER_CCMP:
2014                 return 128;
2015         case WPA_CIPHER_TKIP:
2016                 return 256;
2017         case WPA_CIPHER_WEP104:
2018                 return 104;
2019         case WPA_CIPHER_WEP40:
2020                 return 40;
2021         default:
2022                 return 0;
2023         }
2024 }
2025
2026
2027 #define RSN_SUITE "%02x-%02x-%02x-%d"
2028 #define RSN_SUITE_ARG(s) \
2029 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2030
2031 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2032 {
2033         int len = 0, ret;
2034         char pmkid_txt[PMKID_LEN * 2 + 1];
2035
2036         if (wpa_auth == NULL)
2037                 return len;
2038
2039         ret = os_snprintf(buf + len, buflen - len,
2040                           "dot11RSNAOptionImplemented=TRUE\n"
2041 #ifdef CONFIG_RSN_PREAUTH
2042                           "dot11RSNAPreauthenticationImplemented=TRUE\n"
2043 #else /* CONFIG_RSN_PREAUTH */
2044                           "dot11RSNAPreauthenticationImplemented=FALSE\n"
2045 #endif /* CONFIG_RSN_PREAUTH */
2046                           "dot11RSNAEnabled=%s\n"
2047                           "dot11RSNAPreauthenticationEnabled=%s\n",
2048                           wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2049                           wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2050         if (ret < 0 || (size_t) ret >= buflen - len)
2051                 return len;
2052         len += ret;
2053
2054         wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2055                          wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2056
2057         ret = os_snprintf(
2058                 buf + len, buflen - len,
2059                 "dot11RSNAConfigVersion=%u\n"
2060                 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2061                 /* FIX: dot11RSNAConfigGroupCipher */
2062                 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2063                 /* FIX: dot11RSNAConfigGroupRekeyTime */
2064                 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2065                 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2066                 "dot11RSNAConfigGroupUpdateCount=%u\n"
2067                 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2068                 "dot11RSNAConfigGroupCipherSize=%u\n"
2069                 "dot11RSNAConfigPMKLifetime=%u\n"
2070                 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2071                 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2072                 "dot11RSNAConfigSATimeout=%u\n"
2073                 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2074                 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2075                 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2076                 "dot11RSNAPMKIDUsed=%s\n"
2077                 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2078                 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2079                 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2080                 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2081                 "dot11RSNA4WayHandshakeFailures=%u\n"
2082                 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2083                 RSN_VERSION,
2084                 !!wpa_auth->conf.wpa_strict_rekey,
2085                 dot11RSNAConfigGroupUpdateCount,
2086                 dot11RSNAConfigPairwiseUpdateCount,
2087                 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2088                 dot11RSNAConfigPMKLifetime,
2089                 dot11RSNAConfigPMKReauthThreshold,
2090                 dot11RSNAConfigSATimeout,
2091                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2092                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2093                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2094                 pmkid_txt,
2095                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2096                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2097                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2098                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2099                 wpa_auth->dot11RSNA4WayHandshakeFailures);
2100         if (ret < 0 || (size_t) ret >= buflen - len)
2101                 return len;
2102         len += ret;
2103
2104         /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2105         /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2106
2107         /* Private MIB */
2108         ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2109                           wpa_auth->group->wpa_group_state);
2110         if (ret < 0 || (size_t) ret >= buflen - len)
2111                 return len;
2112         len += ret;
2113
2114         return len;
2115 }
2116
2117
2118 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2119 {
2120         int len = 0, ret;
2121         u32 pairwise = 0;
2122
2123         if (sm == NULL)
2124                 return 0;
2125
2126         /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2127
2128         /* dot11RSNAStatsEntry */
2129
2130         if (sm->wpa == WPA_VERSION_WPA) {
2131                 if (sm->pairwise == WPA_CIPHER_CCMP)
2132                         pairwise = WPA_CIPHER_SUITE_CCMP;
2133                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2134                         pairwise = WPA_CIPHER_SUITE_TKIP;
2135                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2136                         pairwise = WPA_CIPHER_SUITE_WEP104;
2137                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2138                         pairwise = WPA_CIPHER_SUITE_WEP40;
2139                 else if (sm->pairwise == WPA_CIPHER_NONE)
2140                         pairwise = WPA_CIPHER_SUITE_NONE;
2141         } else if (sm->wpa == WPA_VERSION_WPA2) {
2142                 if (sm->pairwise == WPA_CIPHER_CCMP)
2143                         pairwise = RSN_CIPHER_SUITE_CCMP;
2144                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2145                         pairwise = RSN_CIPHER_SUITE_TKIP;
2146                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2147                         pairwise = RSN_CIPHER_SUITE_WEP104;
2148                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2149                         pairwise = RSN_CIPHER_SUITE_WEP40;
2150                 else if (sm->pairwise == WPA_CIPHER_NONE)
2151                         pairwise = RSN_CIPHER_SUITE_NONE;
2152         } else
2153                 return 0;
2154
2155         ret = os_snprintf(
2156                 buf + len, buflen - len,
2157                 /* TODO: dot11RSNAStatsIndex */
2158                 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2159                 "dot11RSNAStatsVersion=1\n"
2160                 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2161                 /* TODO: dot11RSNAStatsTKIPICVErrors */
2162                 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2163                 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2164                 /* TODO: dot11RSNAStatsCCMPReplays */
2165                 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2166                 /* TODO: dot11RSNAStatsTKIPReplays */,
2167                 MAC2STR(sm->addr),
2168                 RSN_SUITE_ARG(pairwise),
2169                 sm->dot11RSNAStatsTKIPLocalMICFailures,
2170                 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2171         if (ret < 0 || (size_t) ret >= buflen - len)
2172                 return len;
2173         len += ret;
2174
2175         /* Private MIB */
2176         ret = os_snprintf(buf + len, buflen - len,
2177                           "hostapdWPAPTKState=%d\n"
2178                           "hostapdWPAPTKGroupState=%d\n",
2179                           sm->wpa_ptk_state,
2180                           sm->wpa_ptk_group_state);
2181         if (ret < 0 || (size_t) ret >= buflen - len)
2182                 return len;
2183         len += ret;
2184
2185         return len;
2186 }
2187
2188
2189 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2190 {
2191         if (wpa_auth)
2192                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2193 }
2194
2195
2196 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2197 {
2198         return sm && sm->pairwise_set;
2199 }
2200
2201
2202 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2203 {
2204         if (sm == NULL)
2205                 return -1;
2206         return sm->wpa_key_mgmt;
2207 }
2208
2209
2210 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2211 {
2212         if (sm == NULL)
2213                 return 0;
2214         return sm->wpa;
2215 }
2216
2217
2218 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2219                              struct rsn_pmksa_cache_entry *entry)
2220 {
2221         if (sm == NULL || sm->pmksa != entry)
2222                 return -1;
2223         sm->pmksa = NULL;
2224         return 0;
2225 }
2226
2227
2228 struct rsn_pmksa_cache_entry *
2229 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2230 {
2231         return sm ? sm->pmksa : NULL;
2232 }
2233
2234
2235 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2236 {
2237         if (sm)
2238                 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2239 }
2240
2241
2242 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2243 {
2244         if (wpa_auth == NULL)
2245                 return NULL;
2246         *len = wpa_auth->wpa_ie_len;
2247         return wpa_auth->wpa_ie;
2248 }
2249
2250
2251 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2252                        int session_timeout, struct eapol_state_machine *eapol)
2253 {
2254         if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2255                 return -1;
2256
2257         if (pmksa_cache_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2258                             sm->wpa_auth->addr, sm->addr, session_timeout,
2259                             eapol, sm->wpa_key_mgmt))
2260                 return 0;
2261
2262         return -1;
2263 }
2264
2265
2266 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2267                                const u8 *pmk, size_t len, const u8 *sta_addr,
2268                                int session_timeout,
2269                                struct eapol_state_machine *eapol)
2270 {
2271         if (wpa_auth == NULL)
2272                 return -1;
2273
2274         if (pmksa_cache_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2275                             sta_addr, session_timeout, eapol,
2276                             WPA_KEY_MGMT_IEEE8021X))
2277                 return 0;
2278
2279         return -1;
2280 }
2281
2282
2283 static struct wpa_group *
2284 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2285 {
2286         struct wpa_group *group;
2287
2288         if (wpa_auth == NULL || wpa_auth->group == NULL)
2289                 return NULL;
2290
2291         wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2292                    vlan_id);
2293         group = wpa_group_init(wpa_auth, vlan_id);
2294         if (group == NULL)
2295                 return NULL;
2296
2297         group->next = wpa_auth->group->next;
2298         wpa_auth->group->next = group;
2299
2300         return group;
2301 }
2302
2303
2304 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2305 {
2306         struct wpa_group *group;
2307
2308         if (sm == NULL || sm->wpa_auth == NULL)
2309                 return 0;
2310
2311         group = sm->wpa_auth->group;
2312         while (group) {
2313                 if (group->vlan_id == vlan_id)
2314                         break;
2315                 group = group->next;
2316         }
2317
2318         if (group == NULL) {
2319                 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2320                 if (group == NULL)
2321                         return -1;
2322         }
2323
2324         if (sm->group == group)
2325                 return 0;
2326
2327         wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2328                    "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2329
2330         sm->group = group;
2331         return 0;
2332 }
2333
2334 #endif /* CONFIG_NATIVE_WINDOWS */