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 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
  47
  48 /* Default timeouts are 100 ms, but this seems to be a bit too fast for most
  49  * WPA Supplicants, so use a bit longer timeout. */
  50 static const u32 dot11RSNAConfigGroupUpdateTimeOut = 1000; /* ms */
  51 static const u32 dot11RSNAConfigGroupUpdateCount = 3;
  52 static const u32 dot11RSNAConfigPairwiseUpdateTimeOut = 1000; /* ms */
  53 static const u32 dot11RSNAConfigPairwiseUpdateCount = 3;
  54
  55 /* TODO: make these configurable */
  56 static const int dot11RSNAConfigPMKLifetime = 43200;
  57 static const int dot11RSNAConfigPMKReauthThreshold = 70;
  58 static const int dot11RSNAConfigSATimeout = 60;
  59
  60
  61 static inline void wpa_auth_mic_failure_report(
  62         struct wpa_authenticator *wpa_auth, const u8 *addr)
  63 {
  64         if (wpa_auth->cb.mic_failure_report)
  65                 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
  66 }
  67
  68
  69 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
  70                                       const u8 *addr, wpa_eapol_variable var,
  71                                       int value)
  72 {
  73         if (wpa_auth->cb.set_eapol)
  74                 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
  75 }
  76
  77
  78 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
  79                                      const u8 *addr, wpa_eapol_variable var)
  80 {
  81         if (wpa_auth->cb.get_eapol == NULL)
  82                 return -1;
  83         return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
  84 }
  85
  86
  87 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
  88                                           const u8 *addr, const u8 *prev_psk)
  89 {
  90         if (wpa_auth->cb.get_psk == NULL)
  91                 return NULL;
  92         return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
  93 }
  94
  95
  96 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
  97                                    const u8 *addr, u8 *msk, size_t *len)
  98 {
  99         if (wpa_auth->cb.get_msk == NULL)
 100                 return -1;
 101         return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
 102 }
 103
 104
 105 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 106                                    int vlan_id,
 107                                    const char *alg, const u8 *addr, int idx,
 108                                    u8 *key, size_t key_len)
 109 {
 110         if (wpa_auth->cb.set_key == NULL)
 111                 return -1;
 112         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 113                                     key, key_len);
 114 }
 115
 116
 117 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 118                                       const u8 *addr, int idx, u8 *seq)
 119 {
 120         if (wpa_auth->cb.get_seqnum == NULL)
 121                 return -1;
 122         return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
 123 }
 124
 125
 126 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
 127                                            const u8 *addr, int idx, u8 *seq)
 128 {
 129         if (wpa_auth->cb.get_seqnum_igtk == NULL)
 130                 return -1;
 131         return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
 132 }
 133
 134
 135 static inline int
 136 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
 137                     const u8 *data, size_t data_len, int encrypt)
 138 {
 139         if (wpa_auth->cb.send_eapol == NULL)
 140                 return -1;
 141         return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
 142                                        encrypt);
 143 }
 144
 145
 146 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
 147                           int (*cb)(struct wpa_state_machine *sm, void *ctx),
 148                           void *cb_ctx)
 149 {
 150         if (wpa_auth->cb.for_each_sta == NULL)
 151                 return 0;
 152         return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
 153 }
 154
 155
 156 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
 157                            int (*cb)(struct wpa_authenticator *a, void *ctx),
 158                            void *cb_ctx)
 159 {
 160         if (wpa_auth->cb.for_each_auth == NULL)
 161                 return 0;
 162         return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
 163 }
 164
 165
 166 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 167                      logger_level level, const char *txt)
 168 {
 169         if (wpa_auth->cb.logger == NULL)
 170                 return;
 171         wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
 172 }
 173
 174
 175 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 176                       logger_level level, const char *fmt, ...)
 177 {
 178         char *format;
 179         int maxlen;
 180         va_list ap;
 181
 182         if (wpa_auth->cb.logger == NULL)
 183                 return;
 184
 185         maxlen = os_strlen(fmt) + 100;
 186         format = os_malloc(maxlen);
 187         if (!format)
 188                 return;
 189
 190         va_start(ap, fmt);
 191         vsnprintf(format, maxlen, fmt, ap);
 192         va_end(ap);
 193
 194         wpa_auth_logger(wpa_auth, addr, level, format);
 195
 196         os_free(format);
 197 }
 198
 199
 200 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
 201                                const u8 *addr)
 202 {
 203         if (wpa_auth->cb.disconnect == NULL)
 204                 return;
 205         wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
 206                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 207 }
 208
 209
 210 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
 211 {
 212         int ret = 0;
 213 #ifdef CONFIG_IEEE80211R
 214         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
 215                 ret = 1;
 216 #endif /* CONFIG_IEEE80211R */
 217 #ifdef CONFIG_IEEE80211W
 218         if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
 219                 ret = 1;
 220 #endif /* CONFIG_IEEE80211W */
 221         return ret;
 222 }
 223
 224
 225 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
 226 {
 227         struct wpa_authenticator *wpa_auth = eloop_ctx;
 228
 229         if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
 230                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 231                            "initialization.");
 232         } else {
 233                 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
 234         }
 235
 236         if (wpa_auth->conf.wpa_gmk_rekey) {
 237                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 238                                        wpa_rekey_gmk, wpa_auth, NULL);
 239         }
 240 }
 241
 242
 243 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
 244 {
 245         struct wpa_authenticator *wpa_auth = eloop_ctx;
 246         struct wpa_group *group;
 247
 248         wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
 249         for (group = wpa_auth->group; group; group = group->next) {
 250                 group->GTKReKey = TRUE;
 251                 do {
 252                         group->changed = FALSE;
 253                         wpa_group_sm_step(wpa_auth, group);
 254                 } while (group->changed);
 255         }
 256
 257         if (wpa_auth->conf.wpa_group_rekey) {
 258                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
 259                                        0, wpa_rekey_gtk, wpa_auth, NULL);
 260         }
 261 }
 262
 263
 264 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
 265 {
 266         struct wpa_authenticator *wpa_auth = eloop_ctx;
 267         struct wpa_state_machine *sm = timeout_ctx;
 268
 269         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
 270         wpa_request_new_ptk(sm);
 271         wpa_sm_step(sm);
 272 }
 273
 274
 275 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
 276 {
 277         if (sm->pmksa == ctx)
 278                 sm->pmksa = NULL;
 279         return 0;
 280 }
 281
 282
 283 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
 284                                    void *ctx)
 285 {
 286         struct wpa_authenticator *wpa_auth = ctx;
 287         wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
 288 }
 289
 290
 291 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
 292                                          int vlan_id)
 293 {
 294         struct wpa_group *group;
 295         u8 buf[ETH_ALEN + 8 + sizeof(group)];
 296         u8 rkey[32];
 297
 298         group = os_zalloc(sizeof(struct wpa_group));
 299         if (group == NULL)
 300                 return NULL;
 301
 302         group->GTKAuthenticator = TRUE;
 303         group->vlan_id = vlan_id;
 304
 305         switch (wpa_auth->conf.wpa_group) {
 306         case WPA_CIPHER_CCMP:
 307                 group->GTK_len = 16;
 308                 break;
 309         case WPA_CIPHER_TKIP:
 310                 group->GTK_len = 32;
 311                 break;
 312         case WPA_CIPHER_WEP104:
 313                 group->GTK_len = 13;
 314                 break;
 315         case WPA_CIPHER_WEP40:
 316                 group->GTK_len = 5;
 317                 break;
 318         }
 319
 320         /* Counter = PRF-256(Random number, "Init Counter",
 321          *                   Local MAC Address || Time)
 322          */
 323         os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
 324         wpa_get_ntp_timestamp(buf + ETH_ALEN);
 325         os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
 326         if (os_get_random(rkey, sizeof(rkey)) ||
 327             os_get_random(group->GMK, WPA_GMK_LEN)) {
 328                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 329                            "initialization.");
 330                 os_free(group);
 331                 return NULL;
 332         }
 333
 334         sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
 335                  group->Counter, WPA_NONCE_LEN);
 336
 337         group->GInit = TRUE;
 338         wpa_group_sm_step(wpa_auth, group);
 339         group->GInit = FALSE;
 340         wpa_group_sm_step(wpa_auth, group);
 341
 342         return group;
 343 }
 344
 345
 346 /**
 347  * wpa_init - Initialize WPA authenticator
 348  * @addr: Authenticator address
 349  * @conf: Configuration for WPA authenticator
 350  * Returns: Pointer to WPA authenticator data or %NULL on failure
 351  */
 352 struct wpa_authenticator * wpa_init(const u8 *addr,
 353                                     struct wpa_auth_config *conf,
 354                                     struct wpa_auth_callbacks *cb)
 355 {
 356         struct wpa_authenticator *wpa_auth;
 357
 358         wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
 359         if (wpa_auth == NULL)
 360                 return NULL;
 361         os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
 362         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 363         os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
 364
 365         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 366                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 367                 os_free(wpa_auth);
 368                 return NULL;
 369         }
 370
 371         wpa_auth->group = wpa_group_init(wpa_auth, 0);
 372         if (wpa_auth->group == NULL) {
 373                 os_free(wpa_auth->wpa_ie);
 374                 os_free(wpa_auth);
 375                 return NULL;
 376         }
 377
 378         wpa_auth->pmksa = pmksa_cache_init(wpa_auth_pmksa_free_cb, wpa_auth);
 379         if (wpa_auth->pmksa == NULL) {
 380                 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
 381                 os_free(wpa_auth->wpa_ie);
 382                 os_free(wpa_auth);
 383                 return NULL;
 384         }
 385
 386 #ifdef CONFIG_IEEE80211R
 387         wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
 388         if (wpa_auth->ft_pmk_cache == NULL) {
 389                 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
 390                 os_free(wpa_auth->wpa_ie);
 391                 pmksa_cache_deinit(wpa_auth->pmksa);
 392                 os_free(wpa_auth);
 393                 return NULL;
 394         }
 395 #endif /* CONFIG_IEEE80211R */
 396
 397         if (wpa_auth->conf.wpa_gmk_rekey) {
 398                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 399                                        wpa_rekey_gmk, wpa_auth, NULL);
 400         }
 401
 402         if (wpa_auth->conf.wpa_group_rekey) {
 403                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
 404                                        wpa_rekey_gtk, wpa_auth, NULL);
 405         }
 406
 407         return wpa_auth;
 408 }
 409
 410
 411 /**
 412  * wpa_deinit - Deinitialize WPA authenticator
 413  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 414  */
 415 void wpa_deinit(struct wpa_authenticator *wpa_auth)
 416 {
 417         struct wpa_group *group, *prev;
 418
 419         eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
 420         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
 421
 422 #ifdef CONFIG_PEERKEY
 423         while (wpa_auth->stsl_negotiations)
 424                 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
 425 #endif /* CONFIG_PEERKEY */
 426
 427         pmksa_cache_deinit(wpa_auth->pmksa);
 428
 429 #ifdef CONFIG_IEEE80211R
 430         wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
 431         wpa_auth->ft_pmk_cache = NULL;
 432 #endif /* CONFIG_IEEE80211R */
 433
 434         os_free(wpa_auth->wpa_ie);
 435
 436         group = wpa_auth->group;
 437         while (group) {
 438                 prev = group;
 439                 group = group->next;
 440                 os_free(prev);
 441         }
 442
 443         os_free(wpa_auth);
 444 }
 445
 446
 447 /**
 448  * wpa_reconfig - Update WPA authenticator configuration
 449  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 450  * @conf: Configuration for WPA authenticator
 451  */
 452 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
 453                  struct wpa_auth_config *conf)
 454 {
 455         if (wpa_auth == NULL)
 456                 return 0;
 457
 458         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 459         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 460                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 461                 return -1;
 462         }
 463
 464         return 0;
 465 }
 466
 467
 468 struct wpa_state_machine *
 469 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr)
 470 {
 471         struct wpa_state_machine *sm;
 472
 473         sm = os_zalloc(sizeof(struct wpa_state_machine));
 474         if (sm == NULL)
 475                 return NULL;
 476         os_memcpy(sm->addr, addr, ETH_ALEN);
 477
 478         sm->wpa_auth = wpa_auth;
 479         sm->group = wpa_auth->group;
 480
 481         return sm;
 482 }
 483
 484
 485 void wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
 486                              struct wpa_state_machine *sm)
 487 {
 488         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 489                 return;
 490
 491 #ifdef CONFIG_IEEE80211R
 492         if (sm->ft_completed) {
 493                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 494                                 "FT authentication already completed - do not "
 495                                 "start 4-way handshake");
 496                 return;
 497         }
 498 #endif /* CONFIG_IEEE80211R */
 499
 500         if (sm->started) {
 501                 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
 502                 sm->ReAuthenticationRequest = TRUE;
 503                 wpa_sm_step(sm);
 504                 return;
 505         }
 506
 507         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 508                         "start authentication");
 509         sm->started = 1;
 510
 511         sm->Init = TRUE;
 512         wpa_sm_step(sm);
 513         sm->Init = FALSE;
 514         sm->AuthenticationRequest = TRUE;
 515         wpa_sm_step(sm);
 516 }
 517
 518
 519 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
 520 {
 521         /* WPA/RSN was not used - clear WPA state. This is needed if the STA
 522          * reassociates back to the same AP while the previous entry for the
 523          * STA has not yet been removed. */
 524         if (sm == NULL)
 525                 return;
 526
 527         sm->wpa_key_mgmt = 0;
 528 }
 529
 530
 531 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
 532 {
 533         os_free(sm->last_rx_eapol_key);
 534         os_free(sm->wpa_ie);
 535         os_free(sm);
 536 }
 537
 538
 539 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
 540 {
 541         if (sm == NULL)
 542                 return;
 543
 544         if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
 545                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
 546                                 "strict rekeying - force GTK rekey since STA "
 547                                 "is leaving");
 548                 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
 549                 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
 550                                        NULL);
 551         }
 552
 553         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
 554         eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
 555         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
 556         if (sm->in_step_loop) {
 557                 /* Must not free state machine while wpa_sm_step() is running.
 558                  * Freeing will be completed in the end of wpa_sm_step(). */
 559                 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
 560                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
 561                 sm->pending_deinit = 1;
 562         } else
 563                 wpa_free_sta_sm(sm);
 564 }
 565
 566
 567 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
 568 {
 569         if (sm == NULL)
 570                 return;
 571
 572         sm->PTKRequest = TRUE;
 573         sm->PTK_valid = 0;
 574 }
 575
 576
 577 static int wpa_replay_counter_valid(struct wpa_state_machine *sm,
 578                                     const u8 *replay_counter)
 579 {
 580         int i;
 581         for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
 582                 if (!sm->key_replay[i].valid)
 583                         break;
 584                 if (os_memcmp(replay_counter, sm->key_replay[i].counter,
 585                               WPA_REPLAY_COUNTER_LEN) == 0)
 586                         return 1;
 587         }
 588         return 0;
 589 }
 590
 591
 592 void wpa_receive(struct wpa_authenticator *wpa_auth,
 593                  struct wpa_state_machine *sm,
 594                  u8 *data, size_t data_len)
 595 {
 596         struct ieee802_1x_hdr *hdr;
 597         struct wpa_eapol_key *key;
 598         u16 key_info, key_data_length;
 599         enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
 600                SMK_M1, SMK_M3, SMK_ERROR } msg;
 601         char *msgtxt;
 602         struct wpa_eapol_ie_parse kde;
 603
 604         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 605                 return;
 606
 607         if (data_len < sizeof(*hdr) + sizeof(*key))
 608                 return;
 609
 610         hdr = (struct ieee802_1x_hdr *) data;
 611         key = (struct wpa_eapol_key *) (hdr + 1);
 612         key_info = WPA_GET_BE16(key->key_info);
 613         key_data_length = WPA_GET_BE16(key->key_data_length);
 614         if (key_data_length > data_len - sizeof(*hdr) - sizeof(*key)) {
 615                 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
 616                            "key_data overflow (%d > %lu)",
 617                            key_data_length,
 618                            (unsigned long) (data_len - sizeof(*hdr) -
 619                                             sizeof(*key)));
 620                 return;
 621         }
 622
 623         /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
 624          * are set */
 625
 626         if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
 627             (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
 628                 if (key_info & WPA_KEY_INFO_ERROR) {
 629                         msg = SMK_ERROR;
 630                         msgtxt = "SMK Error";
 631                 } else {
 632                         msg = SMK_M1;
 633                         msgtxt = "SMK M1";
 634                 }
 635         } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
 636                 msg = SMK_M3;
 637                 msgtxt = "SMK M3";
 638         } else if (key_info & WPA_KEY_INFO_REQUEST) {
 639                 msg = REQUEST;
 640                 msgtxt = "Request";
 641         } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
 642                 msg = GROUP_2;
 643                 msgtxt = "2/2 Group";
 644         } else if (key_data_length == 0) {
 645                 msg = PAIRWISE_4;
 646                 msgtxt = "4/4 Pairwise";
 647         } else {
 648                 msg = PAIRWISE_2;
 649                 msgtxt = "2/4 Pairwise";
 650         }
 651
 652         /* TODO: key_info type validation for PeerKey */
 653         if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
 654             msg == GROUP_2) {
 655                 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
 656                 if (sm->pairwise == WPA_CIPHER_CCMP) {
 657                         if (wpa_use_aes_cmac(sm) &&
 658                             ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
 659                                 wpa_auth_logger(wpa_auth, sm->addr,
 660                                                 LOGGER_WARNING,
 661                                                 "advertised support for "
 662                                                 "AES-128-CMAC, but did not "
 663                                                 "use it");
 664                                 return;
 665                         }
 666
 667                         if (!wpa_use_aes_cmac(sm) &&
 668                             ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
 669                                 wpa_auth_logger(wpa_auth, sm->addr,
 670                                                 LOGGER_WARNING,
 671                                                 "did not use HMAC-SHA1-AES "
 672                                                 "with CCMP");
 673                                 return;
 674                         }
 675                 }
 676         }
 677
 678         if (key_info & WPA_KEY_INFO_REQUEST) {
 679                 if (sm->req_replay_counter_used &&
 680                     os_memcmp(key->replay_counter, sm->req_replay_counter,
 681                               WPA_REPLAY_COUNTER_LEN) <= 0) {
 682                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
 683                                         "received EAPOL-Key request with "
 684                                         "replayed counter");
 685                         return;
 686                 }
 687         }
 688
 689         if (!(key_info & WPA_KEY_INFO_REQUEST) &&
 690             !wpa_replay_counter_valid(sm, key->replay_counter)) {
 691                 int i;
 692                 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 693                                  "received EAPOL-Key %s with unexpected "
 694                                  "replay counter", msgtxt);
 695                 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
 696                         if (!sm->key_replay[i].valid)
 697                                 break;
 698                         wpa_hexdump(MSG_DEBUG, "pending replay counter",
 699                                     sm->key_replay[i].counter,
 700                                     WPA_REPLAY_COUNTER_LEN);
 701                 }
 702                 wpa_hexdump(MSG_DEBUG, "received replay counter",
 703                             key->replay_counter, WPA_REPLAY_COUNTER_LEN);
 704                 return;
 705         }
 706
 707         switch (msg) {
 708         case PAIRWISE_2:
 709                 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
 710                     sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING) {
 711                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 712                                          "received EAPOL-Key msg 2/4 in "
 713                                          "invalid state (%d) - dropped",
 714                                          sm->wpa_ptk_state);
 715                         return;
 716                 }
 717                 if (sm->wpa_ie == NULL ||
 718                     sm->wpa_ie_len != key_data_length ||
 719                     os_memcmp(sm->wpa_ie, key + 1, key_data_length) != 0) {
 720                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 721                                         "WPA IE from (Re)AssocReq did not "
 722                                         "match with msg 2/4");
 723                         if (sm->wpa_ie) {
 724                                 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
 725                                             sm->wpa_ie, sm->wpa_ie_len);
 726                         }
 727                         wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
 728                                     (u8 *) (key + 1), key_data_length);
 729                         /* MLME-DEAUTHENTICATE.request */
 730                         wpa_sta_disconnect(wpa_auth, sm->addr);
 731                         return;
 732                 }
 733                 break;
 734         case PAIRWISE_4:
 735                 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
 736                     !sm->PTK_valid) {
 737                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 738                                          "received EAPOL-Key msg 4/4 in "
 739                                          "invalid state (%d) - dropped",
 740                                          sm->wpa_ptk_state);
 741                         return;
 742                 }
 743                 break;
 744         case GROUP_2:
 745                 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
 746                     || !sm->PTK_valid) {
 747                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 748                                          "received EAPOL-Key msg 2/2 in "
 749                                          "invalid state (%d) - dropped",
 750                                          sm->wpa_ptk_group_state);
 751                         return;
 752                 }
 753                 break;
 754 #ifdef CONFIG_PEERKEY
 755         case SMK_M1:
 756         case SMK_M3:
 757         case SMK_ERROR:
 758                 if (!wpa_auth->conf.peerkey) {
 759                         wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
 760                                    "PeerKey use disabled - ignoring message");
 761                         return;
 762                 }
 763                 if (!sm->PTK_valid) {
 764                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 765                                         "received EAPOL-Key msg SMK in "
 766                                         "invalid state - dropped");
 767                         return;
 768                 }
 769                 break;
 770 #else /* CONFIG_PEERKEY */
 771         case SMK_M1:
 772         case SMK_M3:
 773         case SMK_ERROR:
 774                 return; /* STSL disabled - ignore SMK messages */
 775 #endif /* CONFIG_PEERKEY */
 776         case REQUEST:
 777                 break;
 778         }
 779
 780         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
 781                          "received EAPOL-Key frame (%s)", msgtxt);
 782
 783         if (key_info & WPA_KEY_INFO_ACK) {
 784                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 785                                 "received invalid EAPOL-Key: Key Ack set");
 786                 return;
 787         }
 788
 789         if (!(key_info & WPA_KEY_INFO_MIC)) {
 790                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 791                                 "received invalid EAPOL-Key: Key MIC not set");
 792                 return;
 793         }
 794
 795         sm->MICVerified = FALSE;
 796         if (sm->PTK_valid) {
 797                 if (wpa_verify_key_mic(&sm->PTK, data, data_len)) {
 798                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 799                                         "received EAPOL-Key with invalid MIC");
 800                         return;
 801                 }
 802                 sm->MICVerified = TRUE;
 803                 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
 804         }
 805
 806         if (key_info & WPA_KEY_INFO_REQUEST) {
 807                 if (sm->MICVerified) {
 808                         sm->req_replay_counter_used = 1;
 809                         os_memcpy(sm->req_replay_counter, key->replay_counter,
 810                                   WPA_REPLAY_COUNTER_LEN);
 811                 } else {
 812                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 813                                         "received EAPOL-Key request with "
 814                                         "invalid MIC");
 815                         return;
 816                 }
 817
 818                 /*
 819                  * TODO: should decrypt key data field if encryption was used;
 820                  * even though MAC address KDE is not normally encrypted,
 821                  * supplicant is allowed to encrypt it.
 822                  */
 823                 if (msg == SMK_ERROR) {
 824 #ifdef CONFIG_PEERKEY
 825                         wpa_smk_error(wpa_auth, sm, key);
 826 #endif /* CONFIG_PEERKEY */
 827                         return;
 828                 } else if (key_info & WPA_KEY_INFO_ERROR) {
 829                         /* Supplicant reported a Michael MIC error */
 830                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 831                                         "received EAPOL-Key Error Request "
 832                                         "(STA detected Michael MIC failure)");
 833                         wpa_auth_mic_failure_report(wpa_auth, sm->addr);
 834                         sm->dot11RSNAStatsTKIPRemoteMICFailures++;
 835                         wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
 836                         /* Error report is not a request for a new key
 837                          * handshake, but since Authenticator may do it, let's
 838                          * change the keys now anyway. */
 839                         wpa_request_new_ptk(sm);
 840                 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
 841                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 842                                         "received EAPOL-Key Request for new "
 843                                         "4-Way Handshake");
 844                         wpa_request_new_ptk(sm);
 845 #ifdef CONFIG_PEERKEY
 846                 } else if (msg == SMK_M1) {
 847                         wpa_smk_m1(wpa_auth, sm, key);
 848 #endif /* CONFIG_PEERKEY */
 849                 } else if (key_data_length > 0 &&
 850                            wpa_parse_kde_ies((const u8 *) (key + 1),
 851                                              key_data_length, &kde) == 0 &&
 852                            kde.mac_addr) {
 853                 } else {
 854                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 855                                         "received EAPOL-Key Request for GTK "
 856                                         "rekeying");
 857                         /* FIX: why was this triggering PTK rekeying for the
 858                          * STA that requested Group Key rekeying?? */
 859                         /* wpa_request_new_ptk(sta->wpa_sm); */
 860                         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
 861                         wpa_rekey_gtk(wpa_auth, NULL);
 862                 }
 863         } else {
 864                 /* Do not allow the same key replay counter to be reused. This
 865                  * does also invalidate all other pending replay counters if
 866                  * retransmissions were used, i.e., we will only process one of
 867                  * the pending replies and ignore rest if more than one is
 868                  * received. */
 869                 sm->key_replay[0].valid = FALSE;
 870         }
 871
 872 #ifdef CONFIG_PEERKEY
 873         if (msg == SMK_M3) {
 874                 wpa_smk_m3(wpa_auth, sm, key);
 875                 return;
 876         }
 877 #endif /* CONFIG_PEERKEY */
 878
 879         os_free(sm->last_rx_eapol_key);
 880         sm->last_rx_eapol_key = os_malloc(data_len);
 881         if (sm->last_rx_eapol_key == NULL)
 882                 return;
 883         os_memcpy(sm->last_rx_eapol_key, data, data_len);
 884         sm->last_rx_eapol_key_len = data_len;
 885
 886         sm->EAPOLKeyReceived = TRUE;
 887         sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
 888         sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
 889         os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
 890         wpa_sm_step(sm);
 891 }
 892
 893
 894 static void wpa_gmk_to_gtk(const u8 *gmk, const u8 *addr, const u8 *gnonce,
 895                            u8 *gtk, size_t gtk_len)
 896 {
 897         u8 data[ETH_ALEN + WPA_NONCE_LEN];
 898
 899         /* GTK = PRF-X(GMK, "Group key expansion", AA || GNonce) */
 900         os_memcpy(data, addr, ETH_ALEN);
 901         os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
 902
 903 #ifdef CONFIG_IEEE80211W
 904         sha256_prf(gmk, WPA_GMK_LEN, "Group key expansion",
 905                    data, sizeof(data), gtk, gtk_len);
 906 #else /* CONFIG_IEEE80211W */
 907         sha1_prf(gmk, WPA_GMK_LEN, "Group key expansion",
 908                  data, sizeof(data), gtk, gtk_len);
 909 #endif /* CONFIG_IEEE80211W */
 910
 911         wpa_hexdump_key(MSG_DEBUG, "GMK", gmk, WPA_GMK_LEN);
 912         wpa_hexdump_key(MSG_DEBUG, "GTK", gtk, gtk_len);
 913 }
 914
 915
 916 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
 917 {
 918         struct wpa_authenticator *wpa_auth = eloop_ctx;
 919         struct wpa_state_machine *sm = timeout_ctx;
 920
 921         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
 922         sm->TimeoutEvt = TRUE;
 923         wpa_sm_step(sm);
 924 }
 925
 926
 927 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
 928                       struct wpa_state_machine *sm, int key_info,
 929                       const u8 *key_rsc, const u8 *nonce,
 930                       const u8 *kde, size_t kde_len,
 931                       int keyidx, int encr, int force_version)
 932 {
 933         struct ieee802_1x_hdr *hdr;
 934         struct wpa_eapol_key *key;
 935         size_t len;
 936         int alg;
 937         int key_data_len, pad_len = 0;
 938         u8 *buf, *pos;
 939         int version, pairwise;
 940         int i;
 941
 942         len = sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key);
 943
 944         if (force_version)
 945                 version = force_version;
 946         else if (wpa_use_aes_cmac(sm))
 947                 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
 948         else if (sm->pairwise == WPA_CIPHER_CCMP)
 949                 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
 950         else
 951                 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
 952
 953         pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
 954
 955         wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
 956                    "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
 957                    "encr=%d)",
 958                    version,
 959                    (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
 960                    (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
 961                    (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
 962                    (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
 963                    pairwise, (unsigned long) kde_len, keyidx, encr);
 964
 965         key_data_len = kde_len;
 966
 967         if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
 968              version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
 969                 pad_len = key_data_len % 8;
 970                 if (pad_len)
 971                         pad_len = 8 - pad_len;
 972                 key_data_len += pad_len + 8;
 973         }
 974
 975         len += key_data_len;
 976
 977         hdr = os_zalloc(len);
 978         if (hdr == NULL)
 979                 return;
 980         hdr->version = wpa_auth->conf.eapol_version;
 981         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 982         hdr->length = host_to_be16(len  - sizeof(*hdr));
 983         key = (struct wpa_eapol_key *) (hdr + 1);
 984
 985         key->type = sm->wpa == WPA_VERSION_WPA2 ?
 986                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
 987         key_info |= version;
 988         if (encr && sm->wpa == WPA_VERSION_WPA2)
 989                 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
 990         if (sm->wpa != WPA_VERSION_WPA2)
 991                 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
 992         WPA_PUT_BE16(key->key_info, key_info);
 993
 994         alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
 995         switch (alg) {
 996         case WPA_CIPHER_CCMP:
 997                 WPA_PUT_BE16(key->key_length, 16);
 998                 break;
 999         case WPA_CIPHER_TKIP:
1000                 WPA_PUT_BE16(key->key_length, 32);
1001                 break;
1002         case WPA_CIPHER_WEP40:
1003                 WPA_PUT_BE16(key->key_length, 5);
1004                 break;
1005         case WPA_CIPHER_WEP104:
1006                 WPA_PUT_BE16(key->key_length, 13);
1007                 break;
1008         }
1009         if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1010                 WPA_PUT_BE16(key->key_length, 0);
1011
1012         /* FIX: STSL: what to use as key_replay_counter? */
1013         for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1014                 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1015                 os_memcpy(sm->key_replay[i].counter,
1016                           sm->key_replay[i - 1].counter,
1017                           WPA_REPLAY_COUNTER_LEN);
1018         }
1019         inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1020         os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1021                   WPA_REPLAY_COUNTER_LEN);
1022         sm->key_replay[0].valid = TRUE;
1023
1024         if (nonce)
1025                 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1026
1027         if (key_rsc)
1028                 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1029
1030         if (kde && !encr) {
1031                 os_memcpy(key + 1, kde, kde_len);
1032                 WPA_PUT_BE16(key->key_data_length, kde_len);
1033         } else if (encr && kde) {
1034                 buf = os_zalloc(key_data_len);
1035                 if (buf == NULL) {
1036                         os_free(hdr);
1037                         return;
1038                 }
1039                 pos = buf;
1040                 os_memcpy(pos, kde, kde_len);
1041                 pos += kde_len;
1042
1043                 if (pad_len)
1044                         *pos++ = 0xdd;
1045
1046                 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1047                                 buf, key_data_len);
1048                 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1049                     version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1050                         if (aes_wrap(sm->PTK.kek, (key_data_len - 8) / 8, buf,
1051                                      (u8 *) (key + 1))) {
1052                                 os_free(hdr);
1053                                 os_free(buf);
1054                                 return;
1055                         }
1056                         WPA_PUT_BE16(key->key_data_length, key_data_len);
1057                 } else {
1058                         u8 ek[32];
1059                         os_memcpy(key->key_iv,
1060                                   sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1061                         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1062                         os_memcpy(ek, key->key_iv, 16);
1063                         os_memcpy(ek + 16, sm->PTK.kek, 16);
1064                         os_memcpy(key + 1, buf, key_data_len);
1065                         rc4_skip(ek, 32, 256, (u8 *) (key + 1), key_data_len);
1066                         WPA_PUT_BE16(key->key_data_length, key_data_len);
1067                 }
1068                 os_free(buf);
1069         }
1070
1071         if (key_info & WPA_KEY_INFO_MIC) {
1072                 if (!sm->PTK_valid) {
1073                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1074                                         "PTK not valid when sending EAPOL-Key "
1075                                         "frame");
1076                         os_free(hdr);
1077                         return;
1078                 }
1079                 wpa_eapol_key_mic(sm->PTK.kck, version, (u8 *) hdr, len,
1080                                   key->key_mic);
1081         }
1082
1083         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1084                            1);
1085         wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1086                             sm->pairwise_set);
1087         os_free(hdr);
1088 }
1089
1090
1091 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1092                            struct wpa_state_machine *sm, int key_info,
1093                            const u8 *key_rsc, const u8 *nonce,
1094                            const u8 *kde, size_t kde_len,
1095                            int keyidx, int encr)
1096 {
1097         int timeout_ms;
1098         int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1099
1100         if (sm == NULL)
1101                 return;
1102
1103         __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1104                          keyidx, encr, 0);
1105
1106         timeout_ms = pairwise ? dot11RSNAConfigPairwiseUpdateTimeOut :
1107                 dot11RSNAConfigGroupUpdateTimeOut;
1108         eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1109                                wpa_send_eapol_timeout, wpa_auth, sm);
1110 }
1111
1112
1113 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1114 {
1115         struct ieee802_1x_hdr *hdr;
1116         struct wpa_eapol_key *key;
1117         u16 key_info;
1118         int ret = 0;
1119         u8 mic[16];
1120
1121         if (data_len < sizeof(*hdr) + sizeof(*key))
1122                 return -1;
1123
1124         hdr = (struct ieee802_1x_hdr *) data;
1125         key = (struct wpa_eapol_key *) (hdr + 1);
1126         key_info = WPA_GET_BE16(key->key_info);
1127         os_memcpy(mic, key->key_mic, 16);
1128         os_memset(key->key_mic, 0, 16);
1129         if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1130                               data, data_len, key->key_mic) ||
1131             os_memcmp(mic, key->key_mic, 16) != 0)
1132                 ret = -1;
1133         os_memcpy(key->key_mic, mic, 16);
1134         return ret;
1135 }
1136
1137
1138 void wpa_remove_ptk(struct wpa_state_machine *sm)
1139 {
1140         sm->PTK_valid = FALSE;
1141         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1142         wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1143         sm->pairwise_set = FALSE;
1144         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1145 }
1146
1147
1148 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1149 {
1150         int remove_ptk = 1;
1151
1152         if (sm == NULL)
1153                 return;
1154
1155         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1156                          "event %d notification", event);
1157
1158         switch (event) {
1159         case WPA_AUTH:
1160         case WPA_ASSOC:
1161                 break;
1162         case WPA_DEAUTH:
1163         case WPA_DISASSOC:
1164                 sm->DeauthenticationRequest = TRUE;
1165                 break;
1166         case WPA_REAUTH:
1167         case WPA_REAUTH_EAPOL:
1168                 if (sm->GUpdateStationKeys) {
1169                         /*
1170                          * Reauthentication cancels the pending group key
1171                          * update for this STA.
1172                          */
1173                         sm->group->GKeyDoneStations--;
1174                         sm->GUpdateStationKeys = FALSE;
1175                         sm->PtkGroupInit = TRUE;
1176                 }
1177                 sm->ReAuthenticationRequest = TRUE;
1178                 break;
1179         case WPA_ASSOC_FT:
1180 #ifdef CONFIG_IEEE80211R
1181                 /* Using FT protocol, not WPA auth state machine */
1182                 sm->ft_completed = 1;
1183                 return;
1184 #else /* CONFIG_IEEE80211R */
1185                 break;
1186 #endif /* CONFIG_IEEE80211R */
1187         }
1188
1189 #ifdef CONFIG_IEEE80211R
1190         sm->ft_completed = 0;
1191 #endif /* CONFIG_IEEE80211R */
1192
1193 #ifdef CONFIG_IEEE80211W
1194         if (sm->mgmt_frame_prot && event == WPA_AUTH)
1195                 remove_ptk = 0;
1196 #endif /* CONFIG_IEEE80211W */
1197
1198         if (remove_ptk) {
1199                 sm->PTK_valid = FALSE;
1200                 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1201
1202                 if (event != WPA_REAUTH_EAPOL)
1203                         wpa_remove_ptk(sm);
1204         }
1205
1206         wpa_sm_step(sm);
1207 }
1208
1209
1210 static const char * wpa_alg_txt(int alg)
1211 {
1212         switch (alg) {
1213         case WPA_CIPHER_CCMP:
1214                 return "CCMP";
1215         case WPA_CIPHER_TKIP:
1216                 return "TKIP";
1217         case WPA_CIPHER_WEP104:
1218         case WPA_CIPHER_WEP40:
1219                 return "WEP";
1220         default:
1221                 return "";
1222         }
1223 }
1224
1225
1226 SM_STATE(WPA_PTK, INITIALIZE)
1227 {
1228         SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1229         if (sm->Init) {
1230                 /* Init flag is not cleared here, so avoid busy
1231                  * loop by claiming nothing changed. */
1232                 sm->changed = FALSE;
1233         }
1234
1235         sm->keycount = 0;
1236         if (sm->GUpdateStationKeys)
1237                 sm->group->GKeyDoneStations--;
1238         sm->GUpdateStationKeys = FALSE;
1239         if (sm->wpa == WPA_VERSION_WPA)
1240                 sm->PInitAKeys = FALSE;
1241         if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1242                * Local AA > Remote AA)) */) {
1243                 sm->Pair = TRUE;
1244         }
1245         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1246         wpa_remove_ptk(sm);
1247         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1248         sm->TimeoutCtr = 0;
1249         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1250                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1251                                    WPA_EAPOL_authorized, 0);
1252         }
1253 }
1254
1255
1256 SM_STATE(WPA_PTK, DISCONNECT)
1257 {
1258         SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1259         sm->Disconnect = FALSE;
1260         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1261 }
1262
1263
1264 SM_STATE(WPA_PTK, DISCONNECTED)
1265 {
1266         SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1267         sm->DeauthenticationRequest = FALSE;
1268 }
1269
1270
1271 SM_STATE(WPA_PTK, AUTHENTICATION)
1272 {
1273         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1274         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1275         sm->PTK_valid = FALSE;
1276         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1277                            1);
1278         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1279         sm->AuthenticationRequest = FALSE;
1280 }
1281
1282
1283 SM_STATE(WPA_PTK, AUTHENTICATION2)
1284 {
1285         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1286         os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1287         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1288         sm->ReAuthenticationRequest = FALSE;
1289         /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1290          * logical place than INITIALIZE since AUTHENTICATION2 can be
1291          * re-entered on ReAuthenticationRequest without going through
1292          * INITIALIZE. */
1293         sm->TimeoutCtr = 0;
1294 }
1295
1296
1297 SM_STATE(WPA_PTK, INITPMK)
1298 {
1299         u8 msk[2 * PMK_LEN];
1300         size_t len = 2 * PMK_LEN;
1301
1302         SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1303 #ifdef CONFIG_IEEE80211R
1304         sm->xxkey_len = 0;
1305 #endif /* CONFIG_IEEE80211R */
1306         if (sm->pmksa) {
1307                 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1308                 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1309         } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1310                 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1311                            "(len=%lu)", (unsigned long) len);
1312                 os_memcpy(sm->PMK, msk, PMK_LEN);
1313 #ifdef CONFIG_IEEE80211R
1314                 if (len >= 2 * PMK_LEN) {
1315                         os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1316                         sm->xxkey_len = PMK_LEN;
1317                 }
1318 #endif /* CONFIG_IEEE80211R */
1319         } else {
1320                 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1321         }
1322
1323         sm->req_replay_counter_used = 0;
1324         /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1325          * will break reauthentication since EAPOL state machines may not be
1326          * get into AUTHENTICATING state that clears keyRun before WPA state
1327          * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1328          * state and takes PMK from the previously used AAA Key. This will
1329          * eventually fail in 4-Way Handshake because Supplicant uses PMK
1330          * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1331          * be good workaround for this issue. */
1332         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1333 }
1334
1335
1336 SM_STATE(WPA_PTK, INITPSK)
1337 {
1338         const u8 *psk;
1339         SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1340         psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1341         if (psk) {
1342                 os_memcpy(sm->PMK, psk, PMK_LEN);
1343 #ifdef CONFIG_IEEE80211R
1344                 os_memcpy(sm->xxkey, psk, PMK_LEN);
1345                 sm->xxkey_len = PMK_LEN;
1346 #endif /* CONFIG_IEEE80211R */
1347         }
1348         sm->req_replay_counter_used = 0;
1349 }
1350
1351
1352 SM_STATE(WPA_PTK, PTKSTART)
1353 {
1354         u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1355         size_t pmkid_len = 0;
1356
1357         SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1358         sm->PTKRequest = FALSE;
1359         sm->TimeoutEvt = FALSE;
1360         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1361                         "sending 1/4 msg of 4-Way Handshake");
1362         /*
1363          * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1364          * one possible PSK for this STA.
1365          */
1366         if (sm->wpa == WPA_VERSION_WPA2 &&
1367             wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1368                 pmkid = buf;
1369                 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1370                 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1371                 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1372                 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1373                 if (sm->pmksa)
1374                         os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1375                                   sm->pmksa->pmkid, PMKID_LEN);
1376                 else {
1377                         /*
1378                          * Calculate PMKID since no PMKSA cache entry was
1379                          * available with pre-calculated PMKID.
1380                          */
1381                         rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1382                                   sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1383                                   wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1384                 }
1385         }
1386         wpa_send_eapol(sm->wpa_auth, sm,
1387                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1388                        sm->ANonce, pmkid, pmkid_len, 0, 0);
1389         sm->TimeoutCtr++;
1390 }
1391
1392
1393 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1394                           struct wpa_ptk *ptk)
1395 {
1396 #ifdef CONFIG_IEEE80211R
1397         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1398                 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1399 #endif /* CONFIG_IEEE80211R */
1400
1401         wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1402                        sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1403                        (u8 *) ptk, sizeof(*ptk),
1404                        wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1405
1406         return 0;
1407 }
1408
1409
1410 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1411 {
1412         struct wpa_ptk PTK;
1413         int ok = 0;
1414         const u8 *pmk = NULL;
1415
1416         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1417         sm->EAPOLKeyReceived = FALSE;
1418
1419         /* WPA with IEEE 802.1X: use the derived PMK from EAP
1420          * WPA-PSK: iterate through possible PSKs and select the one matching
1421          * the packet */
1422         for (;;) {
1423                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1424                         pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1425                         if (pmk == NULL)
1426                                 break;
1427                 } else
1428                         pmk = sm->PMK;
1429
1430                 wpa_derive_ptk(sm, pmk, &PTK);
1431
1432                 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1433                                        sm->last_rx_eapol_key_len) == 0) {
1434                         ok = 1;
1435                         break;
1436                 }
1437
1438                 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1439                         break;
1440         }
1441
1442         if (!ok) {
1443                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1444                                 "invalid MIC in msg 2/4 of 4-Way Handshake");
1445                 return;
1446         }
1447
1448         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1449
1450         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1451                 /* PSK may have changed from the previous choice, so update
1452                  * state machine data based on whatever PSK was selected here.
1453                  */
1454                 os_memcpy(sm->PMK, pmk, PMK_LEN);
1455         }
1456
1457         sm->MICVerified = TRUE;
1458
1459         os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1460         sm->PTK_valid = TRUE;
1461 }
1462
1463
1464 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1465 {
1466         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1467         sm->TimeoutCtr = 0;
1468 }
1469
1470
1471 #ifdef CONFIG_IEEE80211W
1472
1473 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1474 {
1475         if (sm->mgmt_frame_prot) {
1476                 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1477         }
1478
1479         return 0;
1480 }
1481
1482
1483 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1484 {
1485         struct wpa_igtk_kde igtk;
1486         struct wpa_group *gsm = sm->group;
1487
1488         if (!sm->mgmt_frame_prot)
1489                 return pos;
1490
1491         igtk.keyid[0] = gsm->GN_igtk;
1492         igtk.keyid[1] = 0;
1493         if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1494             < 0)
1495                 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1496         os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1497         pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1498                           (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1499
1500         return pos;
1501 }
1502
1503 #else /* CONFIG_IEEE80211W */
1504
1505 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1506 {
1507         return 0;
1508 }
1509
1510
1511 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1512 {
1513         return pos;
1514 }
1515
1516 #endif /* CONFIG_IEEE80211W */
1517
1518
1519 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1520 {
1521         u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1522         size_t gtk_len, kde_len;
1523         struct wpa_group *gsm = sm->group;
1524         u8 *wpa_ie;
1525         int wpa_ie_len, secure, keyidx, encr = 0;
1526
1527         SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1528         sm->TimeoutEvt = FALSE;
1529         /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1530          */
1531         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1532         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1533         wpa_ie = sm->wpa_auth->wpa_ie;
1534         wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1535         if (sm->wpa == WPA_VERSION_WPA &&
1536             (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1537             wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1538                 /* WPA-only STA, remove RSN IE */
1539                 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1540                 wpa_ie_len = wpa_ie[1] + 2;
1541         }
1542         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1543                         "sending 3/4 msg of 4-Way Handshake");
1544         if (sm->wpa == WPA_VERSION_WPA2) {
1545                 /* WPA2 send GTK in the 4-way handshake */
1546                 secure = 1;
1547                 gtk = gsm->GTK[gsm->GN - 1];
1548                 gtk_len = gsm->GTK_len;
1549                 keyidx = gsm->GN;
1550                 _rsc = rsc;
1551                 encr = 1;
1552         } else {
1553                 /* WPA does not include GTK in msg 3/4 */
1554                 secure = 0;
1555                 gtk = NULL;
1556                 gtk_len = 0;
1557                 keyidx = 0;
1558                 _rsc = NULL;
1559         }
1560
1561         kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1562         if (gtk)
1563                 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1564         kde = os_malloc(kde_len);
1565         if (kde == NULL)
1566                 return;
1567
1568         pos = kde;
1569         os_memcpy(pos, wpa_ie, wpa_ie_len);
1570         pos += wpa_ie_len;
1571         if (gtk) {
1572                 u8 hdr[2];
1573                 hdr[0] = keyidx & 0x03;
1574                 hdr[1] = 0;
1575                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1576                                   gtk, gtk_len);
1577         }
1578         pos = ieee80211w_kde_add(sm, pos);
1579
1580         wpa_send_eapol(sm->wpa_auth, sm,
1581                        (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1582                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1583                        WPA_KEY_INFO_KEY_TYPE,
1584                        _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1585         os_free(kde);
1586         sm->TimeoutCtr++;
1587 }
1588
1589
1590 SM_STATE(WPA_PTK, PTKINITDONE)
1591 {
1592         SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1593         sm->EAPOLKeyReceived = FALSE;
1594         if (sm->Pair) {
1595                 char *alg;
1596                 int klen;
1597                 if (sm->pairwise == WPA_CIPHER_TKIP) {
1598                         alg = "TKIP";
1599                         klen = 32;
1600                 } else {
1601                         alg = "CCMP";
1602                         klen = 16;
1603                 }
1604                 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1605                                      sm->PTK.tk1, klen)) {
1606                         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1607                         return;
1608                 }
1609                 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1610                 sm->pairwise_set = TRUE;
1611
1612                 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1613                         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1614                         eloop_register_timeout(sm->wpa_auth->conf.
1615                                                wpa_ptk_rekey, 0, wpa_rekey_ptk,
1616                                                sm->wpa_auth, sm);
1617                 }
1618
1619                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1620                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1621                                            WPA_EAPOL_authorized, 1);
1622                 }
1623         }
1624
1625         if (0 /* IBSS == TRUE */) {
1626                 sm->keycount++;
1627                 if (sm->keycount == 2) {
1628                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1629                                            WPA_EAPOL_portValid, 1);
1630                 }
1631         } else {
1632                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1633                                    1);
1634         }
1635         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1636         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1637         if (sm->wpa == WPA_VERSION_WPA)
1638                 sm->PInitAKeys = TRUE;
1639         else
1640                 sm->has_GTK = TRUE;
1641         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1642                          "pairwise key handshake completed (%s)",
1643                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1644
1645 #ifdef CONFIG_IEEE80211R
1646         wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1647 #endif /* CONFIG_IEEE80211R */
1648 }
1649
1650
1651 SM_STEP(WPA_PTK)
1652 {
1653         struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1654
1655         if (sm->Init)
1656                 SM_ENTER(WPA_PTK, INITIALIZE);
1657         else if (sm->Disconnect
1658                  /* || FIX: dot11RSNAConfigSALifetime timeout */)
1659                 SM_ENTER(WPA_PTK, DISCONNECT);
1660         else if (sm->DeauthenticationRequest)
1661                 SM_ENTER(WPA_PTK, DISCONNECTED);
1662         else if (sm->AuthenticationRequest)
1663                 SM_ENTER(WPA_PTK, AUTHENTICATION);
1664         else if (sm->ReAuthenticationRequest)
1665                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1666         else if (sm->PTKRequest)
1667                 SM_ENTER(WPA_PTK, PTKSTART);
1668         else switch (sm->wpa_ptk_state) {
1669         case WPA_PTK_INITIALIZE:
1670                 break;
1671         case WPA_PTK_DISCONNECT:
1672                 SM_ENTER(WPA_PTK, DISCONNECTED);
1673                 break;
1674         case WPA_PTK_DISCONNECTED:
1675                 SM_ENTER(WPA_PTK, INITIALIZE);
1676                 break;
1677         case WPA_PTK_AUTHENTICATION:
1678                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1679                 break;
1680         case WPA_PTK_AUTHENTICATION2:
1681                 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1682                     wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1683                                        WPA_EAPOL_keyRun) > 0)
1684                         SM_ENTER(WPA_PTK, INITPMK);
1685                 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1686                          /* FIX: && 802.1X::keyRun */)
1687                         SM_ENTER(WPA_PTK, INITPSK);
1688                 break;
1689         case WPA_PTK_INITPMK:
1690                 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1691                                        WPA_EAPOL_keyAvailable) > 0)
1692                         SM_ENTER(WPA_PTK, PTKSTART);
1693                 else {
1694                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1695                         SM_ENTER(WPA_PTK, DISCONNECT);
1696                 }
1697                 break;
1698         case WPA_PTK_INITPSK:
1699                 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1700                         SM_ENTER(WPA_PTK, PTKSTART);
1701                 else {
1702                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1703                                         "no PSK configured for the STA");
1704                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1705                         SM_ENTER(WPA_PTK, DISCONNECT);
1706                 }
1707                 break;
1708         case WPA_PTK_PTKSTART:
1709                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1710                     sm->EAPOLKeyPairwise)
1711                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1712                 else if (sm->TimeoutCtr >
1713                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1714                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1715                         SM_ENTER(WPA_PTK, DISCONNECT);
1716                 } else if (sm->TimeoutEvt)
1717                         SM_ENTER(WPA_PTK, PTKSTART);
1718                 break;
1719         case WPA_PTK_PTKCALCNEGOTIATING:
1720                 if (sm->MICVerified)
1721                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1722                 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1723                          sm->EAPOLKeyPairwise)
1724                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1725                 else if (sm->TimeoutEvt)
1726                         SM_ENTER(WPA_PTK, PTKSTART);
1727                 break;
1728         case WPA_PTK_PTKCALCNEGOTIATING2:
1729                 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1730                 break;
1731         case WPA_PTK_PTKINITNEGOTIATING:
1732                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1733                     sm->EAPOLKeyPairwise && sm->MICVerified)
1734                         SM_ENTER(WPA_PTK, PTKINITDONE);
1735                 else if (sm->TimeoutCtr >
1736                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1737                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1738                         SM_ENTER(WPA_PTK, DISCONNECT);
1739                 } else if (sm->TimeoutEvt)
1740                         SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1741                 break;
1742         case WPA_PTK_PTKINITDONE:
1743                 break;
1744         }
1745 }
1746
1747
1748 SM_STATE(WPA_PTK_GROUP, IDLE)
1749 {
1750         SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1751         if (sm->Init) {
1752                 /* Init flag is not cleared here, so avoid busy
1753                  * loop by claiming nothing changed. */
1754                 sm->changed = FALSE;
1755         }
1756         sm->GTimeoutCtr = 0;
1757 }
1758
1759
1760 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1761 {
1762         u8 rsc[WPA_KEY_RSC_LEN];
1763         struct wpa_group *gsm = sm->group;
1764         u8 *kde, *pos, hdr[2];
1765         size_t kde_len;
1766
1767         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1768         if (sm->wpa == WPA_VERSION_WPA)
1769                 sm->PInitAKeys = FALSE;
1770         sm->TimeoutEvt = FALSE;
1771         /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1772         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1773         if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1774                 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1775         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1776                         "sending 1/2 msg of Group Key Handshake");
1777
1778         if (sm->wpa == WPA_VERSION_WPA2) {
1779                 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1780                         ieee80211w_kde_len(sm);
1781                 kde = os_malloc(kde_len);
1782                 if (kde == NULL)
1783                         return;
1784
1785                 pos = kde;
1786                 hdr[0] = gsm->GN & 0x03;
1787                 hdr[1] = 0;
1788                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1789                                   gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1790                 pos = ieee80211w_kde_add(sm, pos);
1791         } else {
1792                 kde = gsm->GTK[gsm->GN - 1];
1793                 pos = kde + gsm->GTK_len;
1794         }
1795
1796         wpa_send_eapol(sm->wpa_auth, sm,
1797                        WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1798                        WPA_KEY_INFO_ACK |
1799                        (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1800                        rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1801         if (sm->wpa == WPA_VERSION_WPA2)
1802                 os_free(kde);
1803         sm->GTimeoutCtr++;
1804 }
1805
1806
1807 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1808 {
1809         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1810         sm->EAPOLKeyReceived = FALSE;
1811         if (sm->GUpdateStationKeys)
1812                 sm->group->GKeyDoneStations--;
1813         sm->GUpdateStationKeys = FALSE;
1814         sm->GTimeoutCtr = 0;
1815         /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1816         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1817                          "group key handshake completed (%s)",
1818                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1819         sm->has_GTK = TRUE;
1820 }
1821
1822
1823 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1824 {
1825         SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1826         if (sm->GUpdateStationKeys)
1827                 sm->group->GKeyDoneStations--;
1828         sm->GUpdateStationKeys = FALSE;
1829         sm->Disconnect = TRUE;
1830 }
1831
1832
1833 SM_STEP(WPA_PTK_GROUP)
1834 {
1835         if (sm->Init || sm->PtkGroupInit) {
1836                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1837                 sm->PtkGroupInit = FALSE;
1838         } else switch (sm->wpa_ptk_group_state) {
1839         case WPA_PTK_GROUP_IDLE:
1840                 if (sm->GUpdateStationKeys ||
1841                     (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1842                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1843                 break;
1844         case WPA_PTK_GROUP_REKEYNEGOTIATING:
1845                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1846                     !sm->EAPOLKeyPairwise && sm->MICVerified)
1847                         SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1848                 else if (sm->GTimeoutCtr >
1849                          (int) dot11RSNAConfigGroupUpdateCount)
1850                         SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1851                 else if (sm->TimeoutEvt)
1852                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1853                 break;
1854         case WPA_PTK_GROUP_KEYERROR:
1855                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1856                 break;
1857         case WPA_PTK_GROUP_REKEYESTABLISHED:
1858                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1859                 break;
1860         }
1861 }
1862
1863
1864 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1865                           struct wpa_group *group)
1866 {
1867         int ret = 0;
1868
1869         /* FIX: is this the correct way of getting GNonce? */
1870         os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1871         inc_byte_array(group->Counter, WPA_NONCE_LEN);
1872         wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1873                        group->GTK[group->GN - 1], group->GTK_len);
1874
1875 #ifdef CONFIG_IEEE80211W
1876         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1877                 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1878                                   WPA_IGTK_LEN) < 0) {
1879                         wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1880                                    "IGTK");
1881                         ret = -1;
1882                 }
1883                 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1884                                 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1885         }
1886 #endif /* CONFIG_IEEE80211W */
1887
1888         return ret;
1889 }
1890
1891
1892 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1893                                struct wpa_group *group)
1894 {
1895         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1896                    "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1897         group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1898         group->wpa_group_state = WPA_GROUP_GTK_INIT;
1899
1900         /* GTK[0..N] = 0 */
1901         os_memset(group->GTK, 0, sizeof(group->GTK));
1902         group->GN = 1;
1903         group->GM = 2;
1904 #ifdef CONFIG_IEEE80211W
1905         group->GN_igtk = 4;
1906         group->GM_igtk = 5;
1907 #endif /* CONFIG_IEEE80211W */
1908         /* GTK[GN] = CalcGTK() */
1909         wpa_gtk_update(wpa_auth, group);
1910 }
1911
1912
1913 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1914 {
1915         if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1916                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1917                                 "Not in PTKINITDONE; skip Group Key update");
1918                 return 0;
1919         }
1920         if (sm->GUpdateStationKeys) {
1921                 /*
1922                  * This should not really happen, but just in case, make sure
1923                  * we do not count the same STA twice in GKeyDoneStations.
1924                  */
1925                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1926                                 "GUpdateStationKeys already set - do not "
1927                                 "increment GKeyDoneStations");
1928         } else {
1929                 sm->group->GKeyDoneStations++;
1930                 sm->GUpdateStationKeys = TRUE;
1931         }
1932         wpa_sm_step(sm);
1933         return 0;
1934 }
1935
1936
1937 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1938                               struct wpa_group *group)
1939 {
1940         int tmp;
1941
1942         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1943                    "SETKEYS (VLAN-ID %d)", group->vlan_id);
1944         group->changed = TRUE;
1945         group->wpa_group_state = WPA_GROUP_SETKEYS;
1946         group->GTKReKey = FALSE;
1947         tmp = group->GM;
1948         group->GM = group->GN;
1949         group->GN = tmp;
1950 #ifdef CONFIG_IEEE80211W
1951         tmp = group->GM_igtk;
1952         group->GM_igtk = group->GN_igtk;
1953         group->GN_igtk = tmp;
1954 #endif /* CONFIG_IEEE80211W */
1955         /* "GKeyDoneStations = GNoStations" is done in more robust way by
1956          * counting the STAs that are marked with GUpdateStationKeys instead of
1957          * including all STAs that could be in not-yet-completed state. */
1958         wpa_gtk_update(wpa_auth, group);
1959
1960         wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1961         wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1962                    group->GKeyDoneStations);
1963 }
1964
1965
1966 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1967                                   struct wpa_group *group)
1968 {
1969         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1970                    "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1971         group->changed = TRUE;
1972         group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1973         wpa_auth_set_key(wpa_auth, group->vlan_id,
1974                          wpa_alg_txt(wpa_auth->conf.wpa_group),
1975                          NULL, group->GN, group->GTK[group->GN - 1],
1976                          group->GTK_len);
1977
1978 #ifdef CONFIG_IEEE80211W
1979         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1980                 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
1981                                  NULL, group->GN_igtk,
1982                                  group->IGTK[group->GN_igtk - 4],
1983                                  WPA_IGTK_LEN);
1984         }
1985 #endif /* CONFIG_IEEE80211W */
1986 }
1987
1988
1989 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
1990                               struct wpa_group *group)
1991 {
1992         if (group->GInit) {
1993                 wpa_group_gtk_init(wpa_auth, group);
1994         } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
1995                    group->GTKAuthenticator) {
1996                 wpa_group_setkeysdone(wpa_auth, group);
1997         } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
1998                    group->GTKReKey) {
1999                 wpa_group_setkeys(wpa_auth, group);
2000         } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2001                 if (group->GKeyDoneStations == 0)
2002                         wpa_group_setkeysdone(wpa_auth, group);
2003                 else if (group->GTKReKey)
2004                         wpa_group_setkeys(wpa_auth, group);
2005         }
2006 }
2007
2008
2009 static void wpa_sm_step(struct wpa_state_machine *sm)
2010 {
2011         if (sm == NULL)
2012                 return;
2013
2014         if (sm->in_step_loop) {
2015                 /* This should not happen, but if it does, make sure we do not
2016                  * end up freeing the state machine too early by exiting the
2017                  * recursive call. */
2018                 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2019                 return;
2020         }
2021
2022         sm->in_step_loop = 1;
2023         do {
2024                 if (sm->pending_deinit)
2025                         break;
2026
2027                 sm->changed = FALSE;
2028                 sm->wpa_auth->group->changed = FALSE;
2029
2030                 SM_STEP_RUN(WPA_PTK);
2031                 if (sm->pending_deinit)
2032                         break;
2033                 SM_STEP_RUN(WPA_PTK_GROUP);
2034                 if (sm->pending_deinit)
2035                         break;
2036                 wpa_group_sm_step(sm->wpa_auth, sm->group);
2037         } while (sm->changed || sm->wpa_auth->group->changed);
2038         sm->in_step_loop = 0;
2039
2040         if (sm->pending_deinit) {
2041                 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2042                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
2043                 wpa_free_sta_sm(sm);
2044         }
2045 }
2046
2047
2048 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2049 {
2050         struct wpa_state_machine *sm = eloop_ctx;
2051         wpa_sm_step(sm);
2052 }
2053
2054
2055 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2056 {
2057         if (sm == NULL)
2058                 return;
2059         eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2060 }
2061
2062
2063 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2064 {
2065         int tmp, i;
2066         struct wpa_group *group;
2067
2068         if (wpa_auth == NULL)
2069                 return;
2070
2071         group = wpa_auth->group;
2072
2073         for (i = 0; i < 2; i++) {
2074                 tmp = group->GM;
2075                 group->GM = group->GN;
2076                 group->GN = tmp;
2077 #ifdef CONFIG_IEEE80211W
2078                 tmp = group->GM_igtk;
2079                 group->GM_igtk = group->GN_igtk;
2080                 group->GN_igtk = tmp;
2081 #endif /* CONFIG_IEEE80211W */
2082                 wpa_gtk_update(wpa_auth, group);
2083         }
2084 }
2085
2086
2087 static const char * wpa_bool_txt(int bool)
2088 {
2089         return bool ? "TRUE" : "FALSE";
2090 }
2091
2092
2093 static int wpa_cipher_bits(int cipher)
2094 {
2095         switch (cipher) {
2096         case WPA_CIPHER_CCMP:
2097                 return 128;
2098         case WPA_CIPHER_TKIP:
2099                 return 256;
2100         case WPA_CIPHER_WEP104:
2101                 return 104;
2102         case WPA_CIPHER_WEP40:
2103                 return 40;
2104         default:
2105                 return 0;
2106         }
2107 }
2108
2109
2110 #define RSN_SUITE "%02x-%02x-%02x-%d"
2111 #define RSN_SUITE_ARG(s) \
2112 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2113
2114 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2115 {
2116         int len = 0, ret;
2117         char pmkid_txt[PMKID_LEN * 2 + 1];
2118
2119         if (wpa_auth == NULL)
2120                 return len;
2121
2122         ret = os_snprintf(buf + len, buflen - len,
2123                           "dot11RSNAOptionImplemented=TRUE\n"
2124 #ifdef CONFIG_RSN_PREAUTH
2125                           "dot11RSNAPreauthenticationImplemented=TRUE\n"
2126 #else /* CONFIG_RSN_PREAUTH */
2127                           "dot11RSNAPreauthenticationImplemented=FALSE\n"
2128 #endif /* CONFIG_RSN_PREAUTH */
2129                           "dot11RSNAEnabled=%s\n"
2130                           "dot11RSNAPreauthenticationEnabled=%s\n",
2131                           wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2132                           wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2133         if (ret < 0 || (size_t) ret >= buflen - len)
2134                 return len;
2135         len += ret;
2136
2137         wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2138                          wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2139
2140         ret = os_snprintf(
2141                 buf + len, buflen - len,
2142                 "dot11RSNAConfigVersion=%u\n"
2143                 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2144                 /* FIX: dot11RSNAConfigGroupCipher */
2145                 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2146                 /* FIX: dot11RSNAConfigGroupRekeyTime */
2147                 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2148                 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2149                 "dot11RSNAConfigGroupUpdateCount=%u\n"
2150                 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2151                 "dot11RSNAConfigGroupCipherSize=%u\n"
2152                 "dot11RSNAConfigPMKLifetime=%u\n"
2153                 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2154                 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2155                 "dot11RSNAConfigSATimeout=%u\n"
2156                 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2157                 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2158                 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2159                 "dot11RSNAPMKIDUsed=%s\n"
2160                 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2161                 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2162                 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2163                 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2164                 "dot11RSNA4WayHandshakeFailures=%u\n"
2165                 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2166                 RSN_VERSION,
2167                 !!wpa_auth->conf.wpa_strict_rekey,
2168                 dot11RSNAConfigGroupUpdateCount,
2169                 dot11RSNAConfigPairwiseUpdateCount,
2170                 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2171                 dot11RSNAConfigPMKLifetime,
2172                 dot11RSNAConfigPMKReauthThreshold,
2173                 dot11RSNAConfigSATimeout,
2174                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2175                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2176                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2177                 pmkid_txt,
2178                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2179                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2180                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2181                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2182                 wpa_auth->dot11RSNA4WayHandshakeFailures);
2183         if (ret < 0 || (size_t) ret >= buflen - len)
2184                 return len;
2185         len += ret;
2186
2187         /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2188         /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2189
2190         /* Private MIB */
2191         ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2192                           wpa_auth->group->wpa_group_state);
2193         if (ret < 0 || (size_t) ret >= buflen - len)
2194                 return len;
2195         len += ret;
2196
2197         return len;
2198 }
2199
2200
2201 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2202 {
2203         int len = 0, ret;
2204         u32 pairwise = 0;
2205
2206         if (sm == NULL)
2207                 return 0;
2208
2209         /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2210
2211         /* dot11RSNAStatsEntry */
2212
2213         if (sm->wpa == WPA_VERSION_WPA) {
2214                 if (sm->pairwise == WPA_CIPHER_CCMP)
2215                         pairwise = WPA_CIPHER_SUITE_CCMP;
2216                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2217                         pairwise = WPA_CIPHER_SUITE_TKIP;
2218                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2219                         pairwise = WPA_CIPHER_SUITE_WEP104;
2220                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2221                         pairwise = WPA_CIPHER_SUITE_WEP40;
2222                 else if (sm->pairwise == WPA_CIPHER_NONE)
2223                         pairwise = WPA_CIPHER_SUITE_NONE;
2224         } else if (sm->wpa == WPA_VERSION_WPA2) {
2225                 if (sm->pairwise == WPA_CIPHER_CCMP)
2226                         pairwise = RSN_CIPHER_SUITE_CCMP;
2227                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2228                         pairwise = RSN_CIPHER_SUITE_TKIP;
2229                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2230                         pairwise = RSN_CIPHER_SUITE_WEP104;
2231                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2232                         pairwise = RSN_CIPHER_SUITE_WEP40;
2233                 else if (sm->pairwise == WPA_CIPHER_NONE)
2234                         pairwise = RSN_CIPHER_SUITE_NONE;
2235         } else
2236                 return 0;
2237
2238         ret = os_snprintf(
2239                 buf + len, buflen - len,
2240                 /* TODO: dot11RSNAStatsIndex */
2241                 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2242                 "dot11RSNAStatsVersion=1\n"
2243                 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2244                 /* TODO: dot11RSNAStatsTKIPICVErrors */
2245                 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2246                 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2247                 /* TODO: dot11RSNAStatsCCMPReplays */
2248                 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2249                 /* TODO: dot11RSNAStatsTKIPReplays */,
2250                 MAC2STR(sm->addr),
2251                 RSN_SUITE_ARG(pairwise),
2252                 sm->dot11RSNAStatsTKIPLocalMICFailures,
2253                 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2254         if (ret < 0 || (size_t) ret >= buflen - len)
2255                 return len;
2256         len += ret;
2257
2258         /* Private MIB */
2259         ret = os_snprintf(buf + len, buflen - len,
2260                           "hostapdWPAPTKState=%d\n"
2261                           "hostapdWPAPTKGroupState=%d\n",
2262                           sm->wpa_ptk_state,
2263                           sm->wpa_ptk_group_state);
2264         if (ret < 0 || (size_t) ret >= buflen - len)
2265                 return len;
2266         len += ret;
2267
2268         return len;
2269 }
2270
2271
2272 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2273 {
2274         if (wpa_auth)
2275                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2276 }
2277
2278
2279 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2280 {
2281         return sm && sm->pairwise_set;
2282 }
2283
2284
2285 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2286 {
2287         if (sm == NULL)
2288                 return -1;
2289         return sm->wpa_key_mgmt;
2290 }
2291
2292
2293 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2294 {
2295         if (sm == NULL)
2296                 return 0;
2297         return sm->wpa;
2298 }
2299
2300
2301 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2302                              struct rsn_pmksa_cache_entry *entry)
2303 {
2304         if (sm == NULL || sm->pmksa != entry)
2305                 return -1;
2306         sm->pmksa = NULL;
2307         return 0;
2308 }
2309
2310
2311 struct rsn_pmksa_cache_entry *
2312 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2313 {
2314         return sm ? sm->pmksa : NULL;
2315 }
2316
2317
2318 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2319 {
2320         if (sm)
2321                 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2322 }
2323
2324
2325 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2326 {
2327         if (wpa_auth == NULL)
2328                 return NULL;
2329         *len = wpa_auth->wpa_ie_len;
2330         return wpa_auth->wpa_ie;
2331 }
2332
2333
2334 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2335                        int session_timeout, struct eapol_state_machine *eapol)
2336 {
2337         if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2338                 return -1;
2339
2340         if (pmksa_cache_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2341                             sm->wpa_auth->addr, sm->addr, session_timeout,
2342                             eapol, sm->wpa_key_mgmt))
2343                 return 0;
2344
2345         return -1;
2346 }
2347
2348
2349 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2350                                const u8 *pmk, size_t len, const u8 *sta_addr,
2351                                int session_timeout,
2352                                struct eapol_state_machine *eapol)
2353 {
2354         if (wpa_auth == NULL)
2355                 return -1;
2356
2357         if (pmksa_cache_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2358                             sta_addr, session_timeout, eapol,
2359                             WPA_KEY_MGMT_IEEE8021X))
2360                 return 0;
2361
2362         return -1;
2363 }
2364
2365
2366 static struct wpa_group *
2367 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2368 {
2369         struct wpa_group *group;
2370
2371         if (wpa_auth == NULL || wpa_auth->group == NULL)
2372                 return NULL;
2373
2374         wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2375                    vlan_id);
2376         group = wpa_group_init(wpa_auth, vlan_id);
2377         if (group == NULL)
2378                 return NULL;
2379
2380         group->next = wpa_auth->group->next;
2381         wpa_auth->group->next = group;
2382
2383         return group;
2384 }
2385
2386
2387 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2388 {
2389         struct wpa_group *group;
2390
2391         if (sm == NULL || sm->wpa_auth == NULL)
2392                 return 0;
2393
2394         group = sm->wpa_auth->group;
2395         while (group) {
2396                 if (group->vlan_id == vlan_id)
2397                         break;
2398                 group = group->next;
2399         }
2400
2401         if (group == NULL) {
2402                 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2403                 if (group == NULL)
2404                         return -1;
2405         }
2406
2407         if (sm->group == group)
2408                 return 0;
2409
2410         wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2411                    "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2412
2413         sm->group = group;
2414         return 0;
2415 }
2416
2417 #endif /* CONFIG_NATIVE_WINDOWS */