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 static const u32 dot11RSNAConfigGroupUpdateCount = 4;
  49 static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
  50 static const u32 eapol_key_timeout_first = 100; /* ms */
  51 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
  52
  53 /* TODO: make these configurable */
  54 static const int dot11RSNAConfigPMKLifetime = 43200;
  55 static const int dot11RSNAConfigPMKReauthThreshold = 70;
  56 static const int dot11RSNAConfigSATimeout = 60;
  57
  58
  59 static inline void wpa_auth_mic_failure_report(
  60         struct wpa_authenticator *wpa_auth, const u8 *addr)
  61 {
  62         if (wpa_auth->cb.mic_failure_report)
  63                 wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
  64 }
  65
  66
  67 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
  68                                       const u8 *addr, wpa_eapol_variable var,
  69                                       int value)
  70 {
  71         if (wpa_auth->cb.set_eapol)
  72                 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
  73 }
  74
  75
  76 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
  77                                      const u8 *addr, wpa_eapol_variable var)
  78 {
  79         if (wpa_auth->cb.get_eapol == NULL)
  80                 return -1;
  81         return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
  82 }
  83
  84
  85 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
  86                                           const u8 *addr, const u8 *prev_psk)
  87 {
  88         if (wpa_auth->cb.get_psk == NULL)
  89                 return NULL;
  90         return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, prev_psk);
  91 }
  92
  93
  94 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
  95                                    const u8 *addr, u8 *msk, size_t *len)
  96 {
  97         if (wpa_auth->cb.get_msk == NULL)
  98                 return -1;
  99         return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
 100 }
 101
 102
 103 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 104                                    int vlan_id,
 105                                    const char *alg, const u8 *addr, int idx,
 106                                    u8 *key, size_t key_len)
 107 {
 108         if (wpa_auth->cb.set_key == NULL)
 109                 return -1;
 110         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 111                                     key, key_len);
 112 }
 113
 114
 115 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 116                                       const u8 *addr, int idx, u8 *seq)
 117 {
 118         if (wpa_auth->cb.get_seqnum == NULL)
 119                 return -1;
 120         return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
 121 }
 122
 123
 124 static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
 125                                            const u8 *addr, int idx, u8 *seq)
 126 {
 127         if (wpa_auth->cb.get_seqnum_igtk == NULL)
 128                 return -1;
 129         return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
 130 }
 131
 132
 133 static inline int
 134 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
 135                     const u8 *data, size_t data_len, int encrypt)
 136 {
 137         if (wpa_auth->cb.send_eapol == NULL)
 138                 return -1;
 139         return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
 140                                        encrypt);
 141 }
 142
 143
 144 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
 145                           int (*cb)(struct wpa_state_machine *sm, void *ctx),
 146                           void *cb_ctx)
 147 {
 148         if (wpa_auth->cb.for_each_sta == NULL)
 149                 return 0;
 150         return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
 151 }
 152
 153
 154 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
 155                            int (*cb)(struct wpa_authenticator *a, void *ctx),
 156                            void *cb_ctx)
 157 {
 158         if (wpa_auth->cb.for_each_auth == NULL)
 159                 return 0;
 160         return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
 161 }
 162
 163
 164 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 165                      logger_level level, const char *txt)
 166 {
 167         if (wpa_auth->cb.logger == NULL)
 168                 return;
 169         wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
 170 }
 171
 172
 173 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 174                       logger_level level, const char *fmt, ...)
 175 {
 176         char *format;
 177         int maxlen;
 178         va_list ap;
 179
 180         if (wpa_auth->cb.logger == NULL)
 181                 return;
 182
 183         maxlen = os_strlen(fmt) + 100;
 184         format = os_malloc(maxlen);
 185         if (!format)
 186                 return;
 187
 188         va_start(ap, fmt);
 189         vsnprintf(format, maxlen, fmt, ap);
 190         va_end(ap);
 191
 192         wpa_auth_logger(wpa_auth, addr, level, format);
 193
 194         os_free(format);
 195 }
 196
 197
 198 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
 199                                const u8 *addr)
 200 {
 201         if (wpa_auth->cb.disconnect == NULL)
 202                 return;
 203         wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
 204                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 205 }
 206
 207
 208 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
 209 {
 210         int ret = 0;
 211 #ifdef CONFIG_IEEE80211R
 212         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
 213                 ret = 1;
 214 #endif /* CONFIG_IEEE80211R */
 215 #ifdef CONFIG_IEEE80211W
 216         if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
 217                 ret = 1;
 218 #endif /* CONFIG_IEEE80211W */
 219         return ret;
 220 }
 221
 222
 223 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
 224 {
 225         struct wpa_authenticator *wpa_auth = eloop_ctx;
 226
 227         if (os_get_random(wpa_auth->group->GMK, WPA_GMK_LEN)) {
 228                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 229                            "initialization.");
 230         } else {
 231                 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
 232         }
 233
 234         if (wpa_auth->conf.wpa_gmk_rekey) {
 235                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 236                                        wpa_rekey_gmk, wpa_auth, NULL);
 237         }
 238 }
 239
 240
 241 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
 242 {
 243         struct wpa_authenticator *wpa_auth = eloop_ctx;
 244         struct wpa_group *group;
 245
 246         wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
 247         for (group = wpa_auth->group; group; group = group->next) {
 248                 group->GTKReKey = TRUE;
 249                 do {
 250                         group->changed = FALSE;
 251                         wpa_group_sm_step(wpa_auth, group);
 252                 } while (group->changed);
 253         }
 254
 255         if (wpa_auth->conf.wpa_group_rekey) {
 256                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
 257                                        0, wpa_rekey_gtk, wpa_auth, NULL);
 258         }
 259 }
 260
 261
 262 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
 263 {
 264         struct wpa_authenticator *wpa_auth = eloop_ctx;
 265         struct wpa_state_machine *sm = timeout_ctx;
 266
 267         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
 268         wpa_request_new_ptk(sm);
 269         wpa_sm_step(sm);
 270 }
 271
 272
 273 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
 274 {
 275         if (sm->pmksa == ctx)
 276                 sm->pmksa = NULL;
 277         return 0;
 278 }
 279
 280
 281 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
 282                                    void *ctx)
 283 {
 284         struct wpa_authenticator *wpa_auth = ctx;
 285         wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
 286 }
 287
 288
 289 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
 290                                          int vlan_id)
 291 {
 292         struct wpa_group *group;
 293         u8 buf[ETH_ALEN + 8 + sizeof(group)];
 294         u8 rkey[32];
 295
 296         group = os_zalloc(sizeof(struct wpa_group));
 297         if (group == NULL)
 298                 return NULL;
 299
 300         group->GTKAuthenticator = TRUE;
 301         group->vlan_id = vlan_id;
 302
 303         switch (wpa_auth->conf.wpa_group) {
 304         case WPA_CIPHER_CCMP:
 305                 group->GTK_len = 16;
 306                 break;
 307         case WPA_CIPHER_TKIP:
 308                 group->GTK_len = 32;
 309                 break;
 310         case WPA_CIPHER_WEP104:
 311                 group->GTK_len = 13;
 312                 break;
 313         case WPA_CIPHER_WEP40:
 314                 group->GTK_len = 5;
 315                 break;
 316         }
 317
 318         /* Counter = PRF-256(Random number, "Init Counter",
 319          *                   Local MAC Address || Time)
 320          */
 321         os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
 322         wpa_get_ntp_timestamp(buf + ETH_ALEN);
 323         os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
 324         if (os_get_random(rkey, sizeof(rkey)) ||
 325             os_get_random(group->GMK, WPA_GMK_LEN)) {
 326                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 327                            "initialization.");
 328                 os_free(group);
 329                 return NULL;
 330         }
 331
 332         sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
 333                  group->Counter, WPA_NONCE_LEN);
 334
 335         group->GInit = TRUE;
 336         wpa_group_sm_step(wpa_auth, group);
 337         group->GInit = FALSE;
 338         wpa_group_sm_step(wpa_auth, group);
 339
 340         return group;
 341 }
 342
 343
 344 /**
 345  * wpa_init - Initialize WPA authenticator
 346  * @addr: Authenticator address
 347  * @conf: Configuration for WPA authenticator
 348  * @cb: Callback functions for WPA authenticator
 349  * Returns: Pointer to WPA authenticator data or %NULL on failure
 350  */
 351 struct wpa_authenticator * wpa_init(const u8 *addr,
 352                                     struct wpa_auth_config *conf,
 353                                     struct wpa_auth_callbacks *cb)
 354 {
 355         struct wpa_authenticator *wpa_auth;
 356
 357         wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
 358         if (wpa_auth == NULL)
 359                 return NULL;
 360         os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
 361         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 362         os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
 363
 364         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 365                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 366                 os_free(wpa_auth);
 367                 return NULL;
 368         }
 369
 370         wpa_auth->group = wpa_group_init(wpa_auth, 0);
 371         if (wpa_auth->group == NULL) {
 372                 os_free(wpa_auth->wpa_ie);
 373                 os_free(wpa_auth);
 374                 return NULL;
 375         }
 376
 377         wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
 378                                                 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_auth_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_auth_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         int ctr;
1100
1101         if (sm == NULL)
1102                 return;
1103
1104         __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1105                          keyidx, encr, 0);
1106
1107         ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1108         if (ctr == 1)
1109                 timeout_ms = eapol_key_timeout_first;
1110         else
1111                 timeout_ms = eapol_key_timeout_subseq;
1112         eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1113                                wpa_send_eapol_timeout, wpa_auth, sm);
1114 }
1115
1116
1117 static int wpa_verify_key_mic(struct wpa_ptk *PTK, u8 *data, size_t data_len)
1118 {
1119         struct ieee802_1x_hdr *hdr;
1120         struct wpa_eapol_key *key;
1121         u16 key_info;
1122         int ret = 0;
1123         u8 mic[16];
1124
1125         if (data_len < sizeof(*hdr) + sizeof(*key))
1126                 return -1;
1127
1128         hdr = (struct ieee802_1x_hdr *) data;
1129         key = (struct wpa_eapol_key *) (hdr + 1);
1130         key_info = WPA_GET_BE16(key->key_info);
1131         os_memcpy(mic, key->key_mic, 16);
1132         os_memset(key->key_mic, 0, 16);
1133         if (wpa_eapol_key_mic(PTK->kck, key_info & WPA_KEY_INFO_TYPE_MASK,
1134                               data, data_len, key->key_mic) ||
1135             os_memcmp(mic, key->key_mic, 16) != 0)
1136                 ret = -1;
1137         os_memcpy(key->key_mic, mic, 16);
1138         return ret;
1139 }
1140
1141
1142 void wpa_remove_ptk(struct wpa_state_machine *sm)
1143 {
1144         sm->PTK_valid = FALSE;
1145         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1146         wpa_auth_set_key(sm->wpa_auth, 0, "none", sm->addr, 0, (u8 *) "", 0);
1147         sm->pairwise_set = FALSE;
1148         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1149 }
1150
1151
1152 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1153 {
1154         int remove_ptk = 1;
1155
1156         if (sm == NULL)
1157                 return;
1158
1159         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1160                          "event %d notification", event);
1161
1162         switch (event) {
1163         case WPA_AUTH:
1164         case WPA_ASSOC:
1165                 break;
1166         case WPA_DEAUTH:
1167         case WPA_DISASSOC:
1168                 sm->DeauthenticationRequest = TRUE;
1169                 break;
1170         case WPA_REAUTH:
1171         case WPA_REAUTH_EAPOL:
1172                 if (sm->GUpdateStationKeys) {
1173                         /*
1174                          * Reauthentication cancels the pending group key
1175                          * update for this STA.
1176                          */
1177                         sm->group->GKeyDoneStations--;
1178                         sm->GUpdateStationKeys = FALSE;
1179                         sm->PtkGroupInit = TRUE;
1180                 }
1181                 sm->ReAuthenticationRequest = TRUE;
1182                 break;
1183         case WPA_ASSOC_FT:
1184 #ifdef CONFIG_IEEE80211R
1185                 /* Using FT protocol, not WPA auth state machine */
1186                 sm->ft_completed = 1;
1187                 return;
1188 #else /* CONFIG_IEEE80211R */
1189                 break;
1190 #endif /* CONFIG_IEEE80211R */
1191         }
1192
1193 #ifdef CONFIG_IEEE80211R
1194         sm->ft_completed = 0;
1195 #endif /* CONFIG_IEEE80211R */
1196
1197 #ifdef CONFIG_IEEE80211W
1198         if (sm->mgmt_frame_prot && event == WPA_AUTH)
1199                 remove_ptk = 0;
1200 #endif /* CONFIG_IEEE80211W */
1201
1202         if (remove_ptk) {
1203                 sm->PTK_valid = FALSE;
1204                 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1205
1206                 if (event != WPA_REAUTH_EAPOL)
1207                         wpa_remove_ptk(sm);
1208         }
1209
1210         wpa_sm_step(sm);
1211 }
1212
1213
1214 static const char * wpa_alg_txt(int alg)
1215 {
1216         switch (alg) {
1217         case WPA_CIPHER_CCMP:
1218                 return "CCMP";
1219         case WPA_CIPHER_TKIP:
1220                 return "TKIP";
1221         case WPA_CIPHER_WEP104:
1222         case WPA_CIPHER_WEP40:
1223                 return "WEP";
1224         default:
1225                 return "";
1226         }
1227 }
1228
1229
1230 SM_STATE(WPA_PTK, INITIALIZE)
1231 {
1232         SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1233         if (sm->Init) {
1234                 /* Init flag is not cleared here, so avoid busy
1235                  * loop by claiming nothing changed. */
1236                 sm->changed = FALSE;
1237         }
1238
1239         sm->keycount = 0;
1240         if (sm->GUpdateStationKeys)
1241                 sm->group->GKeyDoneStations--;
1242         sm->GUpdateStationKeys = FALSE;
1243         if (sm->wpa == WPA_VERSION_WPA)
1244                 sm->PInitAKeys = FALSE;
1245         if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1246                * Local AA > Remote AA)) */) {
1247                 sm->Pair = TRUE;
1248         }
1249         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1250         wpa_remove_ptk(sm);
1251         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1252         sm->TimeoutCtr = 0;
1253         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1254                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1255                                    WPA_EAPOL_authorized, 0);
1256         }
1257 }
1258
1259
1260 SM_STATE(WPA_PTK, DISCONNECT)
1261 {
1262         SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1263         sm->Disconnect = FALSE;
1264         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1265 }
1266
1267
1268 SM_STATE(WPA_PTK, DISCONNECTED)
1269 {
1270         SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1271         sm->DeauthenticationRequest = FALSE;
1272 }
1273
1274
1275 SM_STATE(WPA_PTK, AUTHENTICATION)
1276 {
1277         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1278         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1279         sm->PTK_valid = FALSE;
1280         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1281                            1);
1282         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1283         sm->AuthenticationRequest = FALSE;
1284 }
1285
1286
1287 SM_STATE(WPA_PTK, AUTHENTICATION2)
1288 {
1289         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1290         os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1291         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1292         sm->ReAuthenticationRequest = FALSE;
1293         /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1294          * logical place than INITIALIZE since AUTHENTICATION2 can be
1295          * re-entered on ReAuthenticationRequest without going through
1296          * INITIALIZE. */
1297         sm->TimeoutCtr = 0;
1298 }
1299
1300
1301 SM_STATE(WPA_PTK, INITPMK)
1302 {
1303         u8 msk[2 * PMK_LEN];
1304         size_t len = 2 * PMK_LEN;
1305
1306         SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1307 #ifdef CONFIG_IEEE80211R
1308         sm->xxkey_len = 0;
1309 #endif /* CONFIG_IEEE80211R */
1310         if (sm->pmksa) {
1311                 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1312                 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1313         } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1314                 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1315                            "(len=%lu)", (unsigned long) len);
1316                 os_memcpy(sm->PMK, msk, PMK_LEN);
1317 #ifdef CONFIG_IEEE80211R
1318                 if (len >= 2 * PMK_LEN) {
1319                         os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1320                         sm->xxkey_len = PMK_LEN;
1321                 }
1322 #endif /* CONFIG_IEEE80211R */
1323         } else {
1324                 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1325         }
1326
1327         sm->req_replay_counter_used = 0;
1328         /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1329          * will break reauthentication since EAPOL state machines may not be
1330          * get into AUTHENTICATING state that clears keyRun before WPA state
1331          * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1332          * state and takes PMK from the previously used AAA Key. This will
1333          * eventually fail in 4-Way Handshake because Supplicant uses PMK
1334          * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1335          * be good workaround for this issue. */
1336         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1337 }
1338
1339
1340 SM_STATE(WPA_PTK, INITPSK)
1341 {
1342         const u8 *psk;
1343         SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1344         psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1345         if (psk) {
1346                 os_memcpy(sm->PMK, psk, PMK_LEN);
1347 #ifdef CONFIG_IEEE80211R
1348                 os_memcpy(sm->xxkey, psk, PMK_LEN);
1349                 sm->xxkey_len = PMK_LEN;
1350 #endif /* CONFIG_IEEE80211R */
1351         }
1352         sm->req_replay_counter_used = 0;
1353 }
1354
1355
1356 SM_STATE(WPA_PTK, PTKSTART)
1357 {
1358         u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1359         size_t pmkid_len = 0;
1360
1361         SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1362         sm->PTKRequest = FALSE;
1363         sm->TimeoutEvt = FALSE;
1364
1365         sm->TimeoutCtr++;
1366         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1367                 /* No point in sending the EAPOL-Key - we will disconnect
1368                  * immediately following this. */
1369                 return;
1370         }
1371
1372         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1373                         "sending 1/4 msg of 4-Way Handshake");
1374         /*
1375          * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1376          * one possible PSK for this STA.
1377          */
1378         if (sm->wpa == WPA_VERSION_WPA2 &&
1379             wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1380                 pmkid = buf;
1381                 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1382                 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1383                 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1384                 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1385                 if (sm->pmksa)
1386                         os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1387                                   sm->pmksa->pmkid, PMKID_LEN);
1388                 else {
1389                         /*
1390                          * Calculate PMKID since no PMKSA cache entry was
1391                          * available with pre-calculated PMKID.
1392                          */
1393                         rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1394                                   sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1395                                   wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1396                 }
1397         }
1398         wpa_send_eapol(sm->wpa_auth, sm,
1399                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1400                        sm->ANonce, pmkid, pmkid_len, 0, 0);
1401 }
1402
1403
1404 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1405                           struct wpa_ptk *ptk)
1406 {
1407 #ifdef CONFIG_IEEE80211R
1408         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1409                 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1410 #endif /* CONFIG_IEEE80211R */
1411
1412         wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1413                        sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1414                        (u8 *) ptk, sizeof(*ptk),
1415                        wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1416
1417         return 0;
1418 }
1419
1420
1421 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1422 {
1423         struct wpa_ptk PTK;
1424         int ok = 0;
1425         const u8 *pmk = NULL;
1426
1427         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1428         sm->EAPOLKeyReceived = FALSE;
1429
1430         /* WPA with IEEE 802.1X: use the derived PMK from EAP
1431          * WPA-PSK: iterate through possible PSKs and select the one matching
1432          * the packet */
1433         for (;;) {
1434                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1435                         pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1436                         if (pmk == NULL)
1437                                 break;
1438                 } else
1439                         pmk = sm->PMK;
1440
1441                 wpa_derive_ptk(sm, pmk, &PTK);
1442
1443                 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1444                                        sm->last_rx_eapol_key_len) == 0) {
1445                         ok = 1;
1446                         break;
1447                 }
1448
1449                 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1450                         break;
1451         }
1452
1453         if (!ok) {
1454                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1455                                 "invalid MIC in msg 2/4 of 4-Way Handshake");
1456                 return;
1457         }
1458
1459         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1460
1461         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1462                 /* PSK may have changed from the previous choice, so update
1463                  * state machine data based on whatever PSK was selected here.
1464                  */
1465                 os_memcpy(sm->PMK, pmk, PMK_LEN);
1466         }
1467
1468         sm->MICVerified = TRUE;
1469
1470         os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1471         sm->PTK_valid = TRUE;
1472 }
1473
1474
1475 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1476 {
1477         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1478         sm->TimeoutCtr = 0;
1479 }
1480
1481
1482 #ifdef CONFIG_IEEE80211W
1483
1484 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1485 {
1486         if (sm->mgmt_frame_prot) {
1487                 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1488         }
1489
1490         return 0;
1491 }
1492
1493
1494 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1495 {
1496         struct wpa_igtk_kde igtk;
1497         struct wpa_group *gsm = sm->group;
1498
1499         if (!sm->mgmt_frame_prot)
1500                 return pos;
1501
1502         igtk.keyid[0] = gsm->GN_igtk;
1503         igtk.keyid[1] = 0;
1504         if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1505             < 0)
1506                 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1507         os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1508         pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1509                           (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1510
1511         return pos;
1512 }
1513
1514 #else /* CONFIG_IEEE80211W */
1515
1516 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1517 {
1518         return 0;
1519 }
1520
1521
1522 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1523 {
1524         return pos;
1525 }
1526
1527 #endif /* CONFIG_IEEE80211W */
1528
1529
1530 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1531 {
1532         u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1533         size_t gtk_len, kde_len;
1534         struct wpa_group *gsm = sm->group;
1535         u8 *wpa_ie;
1536         int wpa_ie_len, secure, keyidx, encr = 0;
1537
1538         SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1539         sm->TimeoutEvt = FALSE;
1540
1541         sm->TimeoutCtr++;
1542         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1543                 /* No point in sending the EAPOL-Key - we will disconnect
1544                  * immediately following this. */
1545                 return;
1546         }
1547
1548         /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1549          */
1550         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1551         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1552         wpa_ie = sm->wpa_auth->wpa_ie;
1553         wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1554         if (sm->wpa == WPA_VERSION_WPA &&
1555             (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1556             wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1557                 /* WPA-only STA, remove RSN IE */
1558                 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1559                 wpa_ie_len = wpa_ie[1] + 2;
1560         }
1561         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1562                         "sending 3/4 msg of 4-Way Handshake");
1563         if (sm->wpa == WPA_VERSION_WPA2) {
1564                 /* WPA2 send GTK in the 4-way handshake */
1565                 secure = 1;
1566                 gtk = gsm->GTK[gsm->GN - 1];
1567                 gtk_len = gsm->GTK_len;
1568                 keyidx = gsm->GN;
1569                 _rsc = rsc;
1570                 encr = 1;
1571         } else {
1572                 /* WPA does not include GTK in msg 3/4 */
1573                 secure = 0;
1574                 gtk = NULL;
1575                 gtk_len = 0;
1576                 keyidx = 0;
1577                 _rsc = NULL;
1578         }
1579
1580         kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1581         if (gtk)
1582                 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1583         kde = os_malloc(kde_len);
1584         if (kde == NULL)
1585                 return;
1586
1587         pos = kde;
1588         os_memcpy(pos, wpa_ie, wpa_ie_len);
1589         pos += wpa_ie_len;
1590         if (gtk) {
1591                 u8 hdr[2];
1592                 hdr[0] = keyidx & 0x03;
1593                 hdr[1] = 0;
1594                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1595                                   gtk, gtk_len);
1596         }
1597         pos = ieee80211w_kde_add(sm, pos);
1598
1599         wpa_send_eapol(sm->wpa_auth, sm,
1600                        (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1601                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1602                        WPA_KEY_INFO_KEY_TYPE,
1603                        _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1604         os_free(kde);
1605 }
1606
1607
1608 SM_STATE(WPA_PTK, PTKINITDONE)
1609 {
1610         SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1611         sm->EAPOLKeyReceived = FALSE;
1612         if (sm->Pair) {
1613                 char *alg;
1614                 int klen;
1615                 if (sm->pairwise == WPA_CIPHER_TKIP) {
1616                         alg = "TKIP";
1617                         klen = 32;
1618                 } else {
1619                         alg = "CCMP";
1620                         klen = 16;
1621                 }
1622                 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1623                                      sm->PTK.tk1, klen)) {
1624                         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1625                         return;
1626                 }
1627                 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1628                 sm->pairwise_set = TRUE;
1629
1630                 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1631                         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1632                         eloop_register_timeout(sm->wpa_auth->conf.
1633                                                wpa_ptk_rekey, 0, wpa_rekey_ptk,
1634                                                sm->wpa_auth, sm);
1635                 }
1636
1637                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1638                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1639                                            WPA_EAPOL_authorized, 1);
1640                 }
1641         }
1642
1643         if (0 /* IBSS == TRUE */) {
1644                 sm->keycount++;
1645                 if (sm->keycount == 2) {
1646                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1647                                            WPA_EAPOL_portValid, 1);
1648                 }
1649         } else {
1650                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1651                                    1);
1652         }
1653         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1654         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1655         if (sm->wpa == WPA_VERSION_WPA)
1656                 sm->PInitAKeys = TRUE;
1657         else
1658                 sm->has_GTK = TRUE;
1659         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1660                          "pairwise key handshake completed (%s)",
1661                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1662
1663 #ifdef CONFIG_IEEE80211R
1664         wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1665 #endif /* CONFIG_IEEE80211R */
1666 }
1667
1668
1669 SM_STEP(WPA_PTK)
1670 {
1671         struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1672
1673         if (sm->Init)
1674                 SM_ENTER(WPA_PTK, INITIALIZE);
1675         else if (sm->Disconnect
1676                  /* || FIX: dot11RSNAConfigSALifetime timeout */)
1677                 SM_ENTER(WPA_PTK, DISCONNECT);
1678         else if (sm->DeauthenticationRequest)
1679                 SM_ENTER(WPA_PTK, DISCONNECTED);
1680         else if (sm->AuthenticationRequest)
1681                 SM_ENTER(WPA_PTK, AUTHENTICATION);
1682         else if (sm->ReAuthenticationRequest)
1683                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1684         else if (sm->PTKRequest)
1685                 SM_ENTER(WPA_PTK, PTKSTART);
1686         else switch (sm->wpa_ptk_state) {
1687         case WPA_PTK_INITIALIZE:
1688                 break;
1689         case WPA_PTK_DISCONNECT:
1690                 SM_ENTER(WPA_PTK, DISCONNECTED);
1691                 break;
1692         case WPA_PTK_DISCONNECTED:
1693                 SM_ENTER(WPA_PTK, INITIALIZE);
1694                 break;
1695         case WPA_PTK_AUTHENTICATION:
1696                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1697                 break;
1698         case WPA_PTK_AUTHENTICATION2:
1699                 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1700                     wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1701                                        WPA_EAPOL_keyRun) > 0)
1702                         SM_ENTER(WPA_PTK, INITPMK);
1703                 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1704                          /* FIX: && 802.1X::keyRun */)
1705                         SM_ENTER(WPA_PTK, INITPSK);
1706                 break;
1707         case WPA_PTK_INITPMK:
1708                 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1709                                        WPA_EAPOL_keyAvailable) > 0)
1710                         SM_ENTER(WPA_PTK, PTKSTART);
1711                 else {
1712                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1713                         SM_ENTER(WPA_PTK, DISCONNECT);
1714                 }
1715                 break;
1716         case WPA_PTK_INITPSK:
1717                 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1718                         SM_ENTER(WPA_PTK, PTKSTART);
1719                 else {
1720                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1721                                         "no PSK configured for the STA");
1722                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1723                         SM_ENTER(WPA_PTK, DISCONNECT);
1724                 }
1725                 break;
1726         case WPA_PTK_PTKSTART:
1727                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1728                     sm->EAPOLKeyPairwise)
1729                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1730                 else if (sm->TimeoutCtr >
1731                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1732                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1733                         SM_ENTER(WPA_PTK, DISCONNECT);
1734                 } else if (sm->TimeoutEvt)
1735                         SM_ENTER(WPA_PTK, PTKSTART);
1736                 break;
1737         case WPA_PTK_PTKCALCNEGOTIATING:
1738                 if (sm->MICVerified)
1739                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1740                 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1741                          sm->EAPOLKeyPairwise)
1742                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1743                 else if (sm->TimeoutEvt)
1744                         SM_ENTER(WPA_PTK, PTKSTART);
1745                 break;
1746         case WPA_PTK_PTKCALCNEGOTIATING2:
1747                 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1748                 break;
1749         case WPA_PTK_PTKINITNEGOTIATING:
1750                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1751                     sm->EAPOLKeyPairwise && sm->MICVerified)
1752                         SM_ENTER(WPA_PTK, PTKINITDONE);
1753                 else if (sm->TimeoutCtr >
1754                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1755                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1756                         SM_ENTER(WPA_PTK, DISCONNECT);
1757                 } else if (sm->TimeoutEvt)
1758                         SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1759                 break;
1760         case WPA_PTK_PTKINITDONE:
1761                 break;
1762         }
1763 }
1764
1765
1766 SM_STATE(WPA_PTK_GROUP, IDLE)
1767 {
1768         SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1769         if (sm->Init) {
1770                 /* Init flag is not cleared here, so avoid busy
1771                  * loop by claiming nothing changed. */
1772                 sm->changed = FALSE;
1773         }
1774         sm->GTimeoutCtr = 0;
1775 }
1776
1777
1778 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1779 {
1780         u8 rsc[WPA_KEY_RSC_LEN];
1781         struct wpa_group *gsm = sm->group;
1782         u8 *kde, *pos, hdr[2];
1783         size_t kde_len;
1784
1785         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1786
1787         sm->GTimeoutCtr++;
1788         if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
1789                 /* No point in sending the EAPOL-Key - we will disconnect
1790                  * immediately following this. */
1791                 return;
1792         }
1793
1794         if (sm->wpa == WPA_VERSION_WPA)
1795                 sm->PInitAKeys = FALSE;
1796         sm->TimeoutEvt = FALSE;
1797         /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1798         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1799         if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1800                 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1801         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1802                         "sending 1/2 msg of Group Key Handshake");
1803
1804         if (sm->wpa == WPA_VERSION_WPA2) {
1805                 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1806                         ieee80211w_kde_len(sm);
1807                 kde = os_malloc(kde_len);
1808                 if (kde == NULL)
1809                         return;
1810
1811                 pos = kde;
1812                 hdr[0] = gsm->GN & 0x03;
1813                 hdr[1] = 0;
1814                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1815                                   gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1816                 pos = ieee80211w_kde_add(sm, pos);
1817         } else {
1818                 kde = gsm->GTK[gsm->GN - 1];
1819                 pos = kde + gsm->GTK_len;
1820         }
1821
1822         wpa_send_eapol(sm->wpa_auth, sm,
1823                        WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1824                        WPA_KEY_INFO_ACK |
1825                        (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1826                        rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1827         if (sm->wpa == WPA_VERSION_WPA2)
1828                 os_free(kde);
1829 }
1830
1831
1832 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1833 {
1834         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1835         sm->EAPOLKeyReceived = FALSE;
1836         if (sm->GUpdateStationKeys)
1837                 sm->group->GKeyDoneStations--;
1838         sm->GUpdateStationKeys = FALSE;
1839         sm->GTimeoutCtr = 0;
1840         /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1841         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1842                          "group key handshake completed (%s)",
1843                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1844         sm->has_GTK = TRUE;
1845 }
1846
1847
1848 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1849 {
1850         SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1851         if (sm->GUpdateStationKeys)
1852                 sm->group->GKeyDoneStations--;
1853         sm->GUpdateStationKeys = FALSE;
1854         sm->Disconnect = TRUE;
1855 }
1856
1857
1858 SM_STEP(WPA_PTK_GROUP)
1859 {
1860         if (sm->Init || sm->PtkGroupInit) {
1861                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1862                 sm->PtkGroupInit = FALSE;
1863         } else switch (sm->wpa_ptk_group_state) {
1864         case WPA_PTK_GROUP_IDLE:
1865                 if (sm->GUpdateStationKeys ||
1866                     (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1867                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1868                 break;
1869         case WPA_PTK_GROUP_REKEYNEGOTIATING:
1870                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1871                     !sm->EAPOLKeyPairwise && sm->MICVerified)
1872                         SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1873                 else if (sm->GTimeoutCtr >
1874                          (int) dot11RSNAConfigGroupUpdateCount)
1875                         SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1876                 else if (sm->TimeoutEvt)
1877                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1878                 break;
1879         case WPA_PTK_GROUP_KEYERROR:
1880                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1881                 break;
1882         case WPA_PTK_GROUP_REKEYESTABLISHED:
1883                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1884                 break;
1885         }
1886 }
1887
1888
1889 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1890                           struct wpa_group *group)
1891 {
1892         int ret = 0;
1893
1894         /* FIX: is this the correct way of getting GNonce? */
1895         os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1896         inc_byte_array(group->Counter, WPA_NONCE_LEN);
1897         wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1898                        group->GTK[group->GN - 1], group->GTK_len);
1899
1900 #ifdef CONFIG_IEEE80211W
1901         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1902                 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1903                                   WPA_IGTK_LEN) < 0) {
1904                         wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1905                                    "IGTK");
1906                         ret = -1;
1907                 }
1908                 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1909                                 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1910         }
1911 #endif /* CONFIG_IEEE80211W */
1912
1913         return ret;
1914 }
1915
1916
1917 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1918                                struct wpa_group *group)
1919 {
1920         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1921                    "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1922         group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1923         group->wpa_group_state = WPA_GROUP_GTK_INIT;
1924
1925         /* GTK[0..N] = 0 */
1926         os_memset(group->GTK, 0, sizeof(group->GTK));
1927         group->GN = 1;
1928         group->GM = 2;
1929 #ifdef CONFIG_IEEE80211W
1930         group->GN_igtk = 4;
1931         group->GM_igtk = 5;
1932 #endif /* CONFIG_IEEE80211W */
1933         /* GTK[GN] = CalcGTK() */
1934         wpa_gtk_update(wpa_auth, group);
1935 }
1936
1937
1938 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1939 {
1940         if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1941                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1942                                 "Not in PTKINITDONE; skip Group Key update");
1943                 return 0;
1944         }
1945         if (sm->GUpdateStationKeys) {
1946                 /*
1947                  * This should not really happen, but just in case, make sure
1948                  * we do not count the same STA twice in GKeyDoneStations.
1949                  */
1950                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1951                                 "GUpdateStationKeys already set - do not "
1952                                 "increment GKeyDoneStations");
1953         } else {
1954                 sm->group->GKeyDoneStations++;
1955                 sm->GUpdateStationKeys = TRUE;
1956         }
1957         wpa_sm_step(sm);
1958         return 0;
1959 }
1960
1961
1962 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1963                               struct wpa_group *group)
1964 {
1965         int tmp;
1966
1967         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1968                    "SETKEYS (VLAN-ID %d)", group->vlan_id);
1969         group->changed = TRUE;
1970         group->wpa_group_state = WPA_GROUP_SETKEYS;
1971         group->GTKReKey = FALSE;
1972         tmp = group->GM;
1973         group->GM = group->GN;
1974         group->GN = tmp;
1975 #ifdef CONFIG_IEEE80211W
1976         tmp = group->GM_igtk;
1977         group->GM_igtk = group->GN_igtk;
1978         group->GN_igtk = tmp;
1979 #endif /* CONFIG_IEEE80211W */
1980         /* "GKeyDoneStations = GNoStations" is done in more robust way by
1981          * counting the STAs that are marked with GUpdateStationKeys instead of
1982          * including all STAs that could be in not-yet-completed state. */
1983         wpa_gtk_update(wpa_auth, group);
1984
1985         wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1986         wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1987                    group->GKeyDoneStations);
1988 }
1989
1990
1991 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1992                                   struct wpa_group *group)
1993 {
1994         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1995                    "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1996         group->changed = TRUE;
1997         group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1998         wpa_auth_set_key(wpa_auth, group->vlan_id,
1999                          wpa_alg_txt(wpa_auth->conf.wpa_group),
2000                          NULL, group->GN, group->GTK[group->GN - 1],
2001                          group->GTK_len);
2002
2003 #ifdef CONFIG_IEEE80211W
2004         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
2005                 wpa_auth_set_key(wpa_auth, group->vlan_id, "IGTK",
2006                                  NULL, group->GN_igtk,
2007                                  group->IGTK[group->GN_igtk - 4],
2008                                  WPA_IGTK_LEN);
2009         }
2010 #endif /* CONFIG_IEEE80211W */
2011 }
2012
2013
2014 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2015                               struct wpa_group *group)
2016 {
2017         if (group->GInit) {
2018                 wpa_group_gtk_init(wpa_auth, group);
2019         } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2020                    group->GTKAuthenticator) {
2021                 wpa_group_setkeysdone(wpa_auth, group);
2022         } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2023                    group->GTKReKey) {
2024                 wpa_group_setkeys(wpa_auth, group);
2025         } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2026                 if (group->GKeyDoneStations == 0)
2027                         wpa_group_setkeysdone(wpa_auth, group);
2028                 else if (group->GTKReKey)
2029                         wpa_group_setkeys(wpa_auth, group);
2030         }
2031 }
2032
2033
2034 static void wpa_sm_step(struct wpa_state_machine *sm)
2035 {
2036         if (sm == NULL)
2037                 return;
2038
2039         if (sm->in_step_loop) {
2040                 /* This should not happen, but if it does, make sure we do not
2041                  * end up freeing the state machine too early by exiting the
2042                  * recursive call. */
2043                 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2044                 return;
2045         }
2046
2047         sm->in_step_loop = 1;
2048         do {
2049                 if (sm->pending_deinit)
2050                         break;
2051
2052                 sm->changed = FALSE;
2053                 sm->wpa_auth->group->changed = FALSE;
2054
2055                 SM_STEP_RUN(WPA_PTK);
2056                 if (sm->pending_deinit)
2057                         break;
2058                 SM_STEP_RUN(WPA_PTK_GROUP);
2059                 if (sm->pending_deinit)
2060                         break;
2061                 wpa_group_sm_step(sm->wpa_auth, sm->group);
2062         } while (sm->changed || sm->wpa_auth->group->changed);
2063         sm->in_step_loop = 0;
2064
2065         if (sm->pending_deinit) {
2066                 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2067                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
2068                 wpa_free_sta_sm(sm);
2069         }
2070 }
2071
2072
2073 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2074 {
2075         struct wpa_state_machine *sm = eloop_ctx;
2076         wpa_sm_step(sm);
2077 }
2078
2079
2080 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2081 {
2082         if (sm == NULL)
2083                 return;
2084         eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2085 }
2086
2087
2088 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2089 {
2090         int tmp, i;
2091         struct wpa_group *group;
2092
2093         if (wpa_auth == NULL)
2094                 return;
2095
2096         group = wpa_auth->group;
2097
2098         for (i = 0; i < 2; i++) {
2099                 tmp = group->GM;
2100                 group->GM = group->GN;
2101                 group->GN = tmp;
2102 #ifdef CONFIG_IEEE80211W
2103                 tmp = group->GM_igtk;
2104                 group->GM_igtk = group->GN_igtk;
2105                 group->GN_igtk = tmp;
2106 #endif /* CONFIG_IEEE80211W */
2107                 wpa_gtk_update(wpa_auth, group);
2108         }
2109 }
2110
2111
2112 static const char * wpa_bool_txt(int bool)
2113 {
2114         return bool ? "TRUE" : "FALSE";
2115 }
2116
2117
2118 static int wpa_cipher_bits(int cipher)
2119 {
2120         switch (cipher) {
2121         case WPA_CIPHER_CCMP:
2122                 return 128;
2123         case WPA_CIPHER_TKIP:
2124                 return 256;
2125         case WPA_CIPHER_WEP104:
2126                 return 104;
2127         case WPA_CIPHER_WEP40:
2128                 return 40;
2129         default:
2130                 return 0;
2131         }
2132 }
2133
2134
2135 #define RSN_SUITE "%02x-%02x-%02x-%d"
2136 #define RSN_SUITE_ARG(s) \
2137 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2138
2139 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2140 {
2141         int len = 0, ret;
2142         char pmkid_txt[PMKID_LEN * 2 + 1];
2143
2144         if (wpa_auth == NULL)
2145                 return len;
2146
2147         ret = os_snprintf(buf + len, buflen - len,
2148                           "dot11RSNAOptionImplemented=TRUE\n"
2149 #ifdef CONFIG_RSN_PREAUTH
2150                           "dot11RSNAPreauthenticationImplemented=TRUE\n"
2151 #else /* CONFIG_RSN_PREAUTH */
2152                           "dot11RSNAPreauthenticationImplemented=FALSE\n"
2153 #endif /* CONFIG_RSN_PREAUTH */
2154                           "dot11RSNAEnabled=%s\n"
2155                           "dot11RSNAPreauthenticationEnabled=%s\n",
2156                           wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2157                           wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2158         if (ret < 0 || (size_t) ret >= buflen - len)
2159                 return len;
2160         len += ret;
2161
2162         wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2163                          wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2164
2165         ret = os_snprintf(
2166                 buf + len, buflen - len,
2167                 "dot11RSNAConfigVersion=%u\n"
2168                 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2169                 /* FIX: dot11RSNAConfigGroupCipher */
2170                 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2171                 /* FIX: dot11RSNAConfigGroupRekeyTime */
2172                 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2173                 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2174                 "dot11RSNAConfigGroupUpdateCount=%u\n"
2175                 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2176                 "dot11RSNAConfigGroupCipherSize=%u\n"
2177                 "dot11RSNAConfigPMKLifetime=%u\n"
2178                 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2179                 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2180                 "dot11RSNAConfigSATimeout=%u\n"
2181                 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2182                 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2183                 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2184                 "dot11RSNAPMKIDUsed=%s\n"
2185                 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2186                 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2187                 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2188                 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2189                 "dot11RSNA4WayHandshakeFailures=%u\n"
2190                 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2191                 RSN_VERSION,
2192                 !!wpa_auth->conf.wpa_strict_rekey,
2193                 dot11RSNAConfigGroupUpdateCount,
2194                 dot11RSNAConfigPairwiseUpdateCount,
2195                 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2196                 dot11RSNAConfigPMKLifetime,
2197                 dot11RSNAConfigPMKReauthThreshold,
2198                 dot11RSNAConfigSATimeout,
2199                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2200                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2201                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2202                 pmkid_txt,
2203                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2204                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2205                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2206                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2207                 wpa_auth->dot11RSNA4WayHandshakeFailures);
2208         if (ret < 0 || (size_t) ret >= buflen - len)
2209                 return len;
2210         len += ret;
2211
2212         /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2213         /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2214
2215         /* Private MIB */
2216         ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2217                           wpa_auth->group->wpa_group_state);
2218         if (ret < 0 || (size_t) ret >= buflen - len)
2219                 return len;
2220         len += ret;
2221
2222         return len;
2223 }
2224
2225
2226 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2227 {
2228         int len = 0, ret;
2229         u32 pairwise = 0;
2230
2231         if (sm == NULL)
2232                 return 0;
2233
2234         /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2235
2236         /* dot11RSNAStatsEntry */
2237
2238         if (sm->wpa == WPA_VERSION_WPA) {
2239                 if (sm->pairwise == WPA_CIPHER_CCMP)
2240                         pairwise = WPA_CIPHER_SUITE_CCMP;
2241                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2242                         pairwise = WPA_CIPHER_SUITE_TKIP;
2243                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2244                         pairwise = WPA_CIPHER_SUITE_WEP104;
2245                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2246                         pairwise = WPA_CIPHER_SUITE_WEP40;
2247                 else if (sm->pairwise == WPA_CIPHER_NONE)
2248                         pairwise = WPA_CIPHER_SUITE_NONE;
2249         } else if (sm->wpa == WPA_VERSION_WPA2) {
2250                 if (sm->pairwise == WPA_CIPHER_CCMP)
2251                         pairwise = RSN_CIPHER_SUITE_CCMP;
2252                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2253                         pairwise = RSN_CIPHER_SUITE_TKIP;
2254                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2255                         pairwise = RSN_CIPHER_SUITE_WEP104;
2256                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2257                         pairwise = RSN_CIPHER_SUITE_WEP40;
2258                 else if (sm->pairwise == WPA_CIPHER_NONE)
2259                         pairwise = RSN_CIPHER_SUITE_NONE;
2260         } else
2261                 return 0;
2262
2263         ret = os_snprintf(
2264                 buf + len, buflen - len,
2265                 /* TODO: dot11RSNAStatsIndex */
2266                 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2267                 "dot11RSNAStatsVersion=1\n"
2268                 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2269                 /* TODO: dot11RSNAStatsTKIPICVErrors */
2270                 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2271                 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2272                 /* TODO: dot11RSNAStatsCCMPReplays */
2273                 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2274                 /* TODO: dot11RSNAStatsTKIPReplays */,
2275                 MAC2STR(sm->addr),
2276                 RSN_SUITE_ARG(pairwise),
2277                 sm->dot11RSNAStatsTKIPLocalMICFailures,
2278                 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2279         if (ret < 0 || (size_t) ret >= buflen - len)
2280                 return len;
2281         len += ret;
2282
2283         /* Private MIB */
2284         ret = os_snprintf(buf + len, buflen - len,
2285                           "hostapdWPAPTKState=%d\n"
2286                           "hostapdWPAPTKGroupState=%d\n",
2287                           sm->wpa_ptk_state,
2288                           sm->wpa_ptk_group_state);
2289         if (ret < 0 || (size_t) ret >= buflen - len)
2290                 return len;
2291         len += ret;
2292
2293         return len;
2294 }
2295
2296
2297 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2298 {
2299         if (wpa_auth)
2300                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2301 }
2302
2303
2304 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2305 {
2306         return sm && sm->pairwise_set;
2307 }
2308
2309
2310 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2311 {
2312         return sm->pairwise;
2313 }
2314
2315
2316 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2317 {
2318         if (sm == NULL)
2319                 return -1;
2320         return sm->wpa_key_mgmt;
2321 }
2322
2323
2324 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2325 {
2326         if (sm == NULL)
2327                 return 0;
2328         return sm->wpa;
2329 }
2330
2331
2332 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2333                              struct rsn_pmksa_cache_entry *entry)
2334 {
2335         if (sm == NULL || sm->pmksa != entry)
2336                 return -1;
2337         sm->pmksa = NULL;
2338         return 0;
2339 }
2340
2341
2342 struct rsn_pmksa_cache_entry *
2343 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2344 {
2345         return sm ? sm->pmksa : NULL;
2346 }
2347
2348
2349 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2350 {
2351         if (sm)
2352                 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2353 }
2354
2355
2356 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2357 {
2358         if (wpa_auth == NULL)
2359                 return NULL;
2360         *len = wpa_auth->wpa_ie_len;
2361         return wpa_auth->wpa_ie;
2362 }
2363
2364
2365 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2366                        int session_timeout, struct eapol_state_machine *eapol)
2367 {
2368         if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2369                 return -1;
2370
2371         if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2372                                  sm->wpa_auth->addr, sm->addr, session_timeout,
2373                                  eapol, sm->wpa_key_mgmt))
2374                 return 0;
2375
2376         return -1;
2377 }
2378
2379
2380 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2381                                const u8 *pmk, size_t len, const u8 *sta_addr,
2382                                int session_timeout,
2383                                struct eapol_state_machine *eapol)
2384 {
2385         if (wpa_auth == NULL)
2386                 return -1;
2387
2388         if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2389                                  sta_addr, session_timeout, eapol,
2390                                  WPA_KEY_MGMT_IEEE8021X))
2391                 return 0;
2392
2393         return -1;
2394 }
2395
2396
2397 static struct wpa_group *
2398 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2399 {
2400         struct wpa_group *group;
2401
2402         if (wpa_auth == NULL || wpa_auth->group == NULL)
2403                 return NULL;
2404
2405         wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2406                    vlan_id);
2407         group = wpa_group_init(wpa_auth, vlan_id);
2408         if (group == NULL)
2409                 return NULL;
2410
2411         group->next = wpa_auth->group->next;
2412         wpa_auth->group->next = group;
2413
2414         return group;
2415 }
2416
2417
2418 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2419 {
2420         struct wpa_group *group;
2421
2422         if (sm == NULL || sm->wpa_auth == NULL)
2423                 return 0;
2424
2425         group = sm->wpa_auth->group;
2426         while (group) {
2427                 if (group->vlan_id == vlan_id)
2428                         break;
2429                 group = group->next;
2430         }
2431
2432         if (group == NULL) {
2433                 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2434                 if (group == NULL)
2435                         return -1;
2436         }
2437
2438         if (sm->group == group)
2439                 return 0;
2440
2441         wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2442                    "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2443
2444         sm->group = group;
2445         return 0;
2446 }
2447
2448 #endif /* CONFIG_NATIVE_WINDOWS */