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                                    wpa_alg 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, WPA_ALG_NONE, sm->addr, 0, (u8 *) "",
1147                          0);
1148         sm->pairwise_set = FALSE;
1149         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1150 }
1151
1152
1153 void wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1154 {
1155         int remove_ptk = 1;
1156
1157         if (sm == NULL)
1158                 return;
1159
1160         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1161                          "event %d notification", event);
1162
1163         switch (event) {
1164         case WPA_AUTH:
1165         case WPA_ASSOC:
1166                 break;
1167         case WPA_DEAUTH:
1168         case WPA_DISASSOC:
1169                 sm->DeauthenticationRequest = TRUE;
1170                 break;
1171         case WPA_REAUTH:
1172         case WPA_REAUTH_EAPOL:
1173                 if (sm->GUpdateStationKeys) {
1174                         /*
1175                          * Reauthentication cancels the pending group key
1176                          * update for this STA.
1177                          */
1178                         sm->group->GKeyDoneStations--;
1179                         sm->GUpdateStationKeys = FALSE;
1180                         sm->PtkGroupInit = TRUE;
1181                 }
1182                 sm->ReAuthenticationRequest = TRUE;
1183                 break;
1184         case WPA_ASSOC_FT:
1185 #ifdef CONFIG_IEEE80211R
1186                 /* Using FT protocol, not WPA auth state machine */
1187                 sm->ft_completed = 1;
1188                 return;
1189 #else /* CONFIG_IEEE80211R */
1190                 break;
1191 #endif /* CONFIG_IEEE80211R */
1192         }
1193
1194 #ifdef CONFIG_IEEE80211R
1195         sm->ft_completed = 0;
1196 #endif /* CONFIG_IEEE80211R */
1197
1198 #ifdef CONFIG_IEEE80211W
1199         if (sm->mgmt_frame_prot && event == WPA_AUTH)
1200                 remove_ptk = 0;
1201 #endif /* CONFIG_IEEE80211W */
1202
1203         if (remove_ptk) {
1204                 sm->PTK_valid = FALSE;
1205                 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1206
1207                 if (event != WPA_REAUTH_EAPOL)
1208                         wpa_remove_ptk(sm);
1209         }
1210
1211         wpa_sm_step(sm);
1212 }
1213
1214
1215 static wpa_alg wpa_alg_enum(int alg)
1216 {
1217         switch (alg) {
1218         case WPA_CIPHER_CCMP:
1219                 return WPA_ALG_CCMP;
1220         case WPA_CIPHER_TKIP:
1221                 return WPA_ALG_TKIP;
1222         case WPA_CIPHER_WEP104:
1223         case WPA_CIPHER_WEP40:
1224                 return WPA_ALG_WEP;
1225         default:
1226                 return WPA_ALG_NONE;
1227         }
1228 }
1229
1230
1231 SM_STATE(WPA_PTK, INITIALIZE)
1232 {
1233         SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1234         if (sm->Init) {
1235                 /* Init flag is not cleared here, so avoid busy
1236                  * loop by claiming nothing changed. */
1237                 sm->changed = FALSE;
1238         }
1239
1240         sm->keycount = 0;
1241         if (sm->GUpdateStationKeys)
1242                 sm->group->GKeyDoneStations--;
1243         sm->GUpdateStationKeys = FALSE;
1244         if (sm->wpa == WPA_VERSION_WPA)
1245                 sm->PInitAKeys = FALSE;
1246         if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1247                * Local AA > Remote AA)) */) {
1248                 sm->Pair = TRUE;
1249         }
1250         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1251         wpa_remove_ptk(sm);
1252         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1253         sm->TimeoutCtr = 0;
1254         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1255                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1256                                    WPA_EAPOL_authorized, 0);
1257         }
1258 }
1259
1260
1261 SM_STATE(WPA_PTK, DISCONNECT)
1262 {
1263         SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1264         sm->Disconnect = FALSE;
1265         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1266 }
1267
1268
1269 SM_STATE(WPA_PTK, DISCONNECTED)
1270 {
1271         SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1272         sm->DeauthenticationRequest = FALSE;
1273 }
1274
1275
1276 SM_STATE(WPA_PTK, AUTHENTICATION)
1277 {
1278         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1279         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1280         sm->PTK_valid = FALSE;
1281         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1282                            1);
1283         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1284         sm->AuthenticationRequest = FALSE;
1285 }
1286
1287
1288 SM_STATE(WPA_PTK, AUTHENTICATION2)
1289 {
1290         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1291         os_memcpy(sm->ANonce, sm->group->Counter, WPA_NONCE_LEN);
1292         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1293         sm->ReAuthenticationRequest = FALSE;
1294         /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1295          * logical place than INITIALIZE since AUTHENTICATION2 can be
1296          * re-entered on ReAuthenticationRequest without going through
1297          * INITIALIZE. */
1298         sm->TimeoutCtr = 0;
1299 }
1300
1301
1302 SM_STATE(WPA_PTK, INITPMK)
1303 {
1304         u8 msk[2 * PMK_LEN];
1305         size_t len = 2 * PMK_LEN;
1306
1307         SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1308 #ifdef CONFIG_IEEE80211R
1309         sm->xxkey_len = 0;
1310 #endif /* CONFIG_IEEE80211R */
1311         if (sm->pmksa) {
1312                 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1313                 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1314         } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1315                 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1316                            "(len=%lu)", (unsigned long) len);
1317                 os_memcpy(sm->PMK, msk, PMK_LEN);
1318 #ifdef CONFIG_IEEE80211R
1319                 if (len >= 2 * PMK_LEN) {
1320                         os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1321                         sm->xxkey_len = PMK_LEN;
1322                 }
1323 #endif /* CONFIG_IEEE80211R */
1324         } else {
1325                 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK");
1326         }
1327
1328         sm->req_replay_counter_used = 0;
1329         /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1330          * will break reauthentication since EAPOL state machines may not be
1331          * get into AUTHENTICATING state that clears keyRun before WPA state
1332          * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1333          * state and takes PMK from the previously used AAA Key. This will
1334          * eventually fail in 4-Way Handshake because Supplicant uses PMK
1335          * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1336          * be good workaround for this issue. */
1337         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1338 }
1339
1340
1341 SM_STATE(WPA_PTK, INITPSK)
1342 {
1343         const u8 *psk;
1344         SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1345         psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL);
1346         if (psk) {
1347                 os_memcpy(sm->PMK, psk, PMK_LEN);
1348 #ifdef CONFIG_IEEE80211R
1349                 os_memcpy(sm->xxkey, psk, PMK_LEN);
1350                 sm->xxkey_len = PMK_LEN;
1351 #endif /* CONFIG_IEEE80211R */
1352         }
1353         sm->req_replay_counter_used = 0;
1354 }
1355
1356
1357 SM_STATE(WPA_PTK, PTKSTART)
1358 {
1359         u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1360         size_t pmkid_len = 0;
1361
1362         SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1363         sm->PTKRequest = FALSE;
1364         sm->TimeoutEvt = FALSE;
1365
1366         sm->TimeoutCtr++;
1367         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1368                 /* No point in sending the EAPOL-Key - we will disconnect
1369                  * immediately following this. */
1370                 return;
1371         }
1372
1373         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1374                         "sending 1/4 msg of 4-Way Handshake");
1375         /*
1376          * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1377          * one possible PSK for this STA.
1378          */
1379         if (sm->wpa == WPA_VERSION_WPA2 &&
1380             wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt)) {
1381                 pmkid = buf;
1382                 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1383                 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1384                 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1385                 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1386                 if (sm->pmksa)
1387                         os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1388                                   sm->pmksa->pmkid, PMKID_LEN);
1389                 else {
1390                         /*
1391                          * Calculate PMKID since no PMKSA cache entry was
1392                          * available with pre-calculated PMKID.
1393                          */
1394                         rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1395                                   sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1396                                   wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1397                 }
1398         }
1399         wpa_send_eapol(sm->wpa_auth, sm,
1400                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1401                        sm->ANonce, pmkid, pmkid_len, 0, 0);
1402 }
1403
1404
1405 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *pmk,
1406                           struct wpa_ptk *ptk)
1407 {
1408 #ifdef CONFIG_IEEE80211R
1409         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1410                 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1411 #endif /* CONFIG_IEEE80211R */
1412
1413         wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1414                        sm->wpa_auth->addr, sm->addr, sm->ANonce, sm->SNonce,
1415                        (u8 *) ptk, sizeof(*ptk),
1416                        wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1417
1418         return 0;
1419 }
1420
1421
1422 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1423 {
1424         struct wpa_ptk PTK;
1425         int ok = 0;
1426         const u8 *pmk = NULL;
1427
1428         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1429         sm->EAPOLKeyReceived = FALSE;
1430
1431         /* WPA with IEEE 802.1X: use the derived PMK from EAP
1432          * WPA-PSK: iterate through possible PSKs and select the one matching
1433          * the packet */
1434         for (;;) {
1435                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1436                         pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, pmk);
1437                         if (pmk == NULL)
1438                                 break;
1439                 } else
1440                         pmk = sm->PMK;
1441
1442                 wpa_derive_ptk(sm, pmk, &PTK);
1443
1444                 if (wpa_verify_key_mic(&PTK, sm->last_rx_eapol_key,
1445                                        sm->last_rx_eapol_key_len) == 0) {
1446                         ok = 1;
1447                         break;
1448                 }
1449
1450                 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
1451                         break;
1452         }
1453
1454         if (!ok) {
1455                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1456                                 "invalid MIC in msg 2/4 of 4-Way Handshake");
1457                 return;
1458         }
1459
1460         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
1461
1462         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1463                 /* PSK may have changed from the previous choice, so update
1464                  * state machine data based on whatever PSK was selected here.
1465                  */
1466                 os_memcpy(sm->PMK, pmk, PMK_LEN);
1467         }
1468
1469         sm->MICVerified = TRUE;
1470
1471         os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
1472         sm->PTK_valid = TRUE;
1473 }
1474
1475
1476 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
1477 {
1478         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
1479         sm->TimeoutCtr = 0;
1480 }
1481
1482
1483 #ifdef CONFIG_IEEE80211W
1484
1485 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1486 {
1487         if (sm->mgmt_frame_prot) {
1488                 return 2 + RSN_SELECTOR_LEN + sizeof(struct wpa_igtk_kde);
1489         }
1490
1491         return 0;
1492 }
1493
1494
1495 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1496 {
1497         struct wpa_igtk_kde igtk;
1498         struct wpa_group *gsm = sm->group;
1499
1500         if (!sm->mgmt_frame_prot)
1501                 return pos;
1502
1503         igtk.keyid[0] = gsm->GN_igtk;
1504         igtk.keyid[1] = 0;
1505         if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
1506             < 0)
1507                 os_memset(igtk.pn, 0, sizeof(igtk.pn));
1508         os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
1509         pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
1510                           (const u8 *) &igtk, sizeof(igtk), NULL, 0);
1511
1512         return pos;
1513 }
1514
1515 #else /* CONFIG_IEEE80211W */
1516
1517 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
1518 {
1519         return 0;
1520 }
1521
1522
1523 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
1524 {
1525         return pos;
1526 }
1527
1528 #endif /* CONFIG_IEEE80211W */
1529
1530
1531 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
1532 {
1533         u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos;
1534         size_t gtk_len, kde_len;
1535         struct wpa_group *gsm = sm->group;
1536         u8 *wpa_ie;
1537         int wpa_ie_len, secure, keyidx, encr = 0;
1538
1539         SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
1540         sm->TimeoutEvt = FALSE;
1541
1542         sm->TimeoutCtr++;
1543         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1544                 /* No point in sending the EAPOL-Key - we will disconnect
1545                  * immediately following this. */
1546                 return;
1547         }
1548
1549         /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, GTK[GN])
1550          */
1551         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1552         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1553         wpa_ie = sm->wpa_auth->wpa_ie;
1554         wpa_ie_len = sm->wpa_auth->wpa_ie_len;
1555         if (sm->wpa == WPA_VERSION_WPA &&
1556             (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
1557             wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
1558                 /* WPA-only STA, remove RSN IE */
1559                 wpa_ie = wpa_ie + wpa_ie[1] + 2;
1560                 wpa_ie_len = wpa_ie[1] + 2;
1561         }
1562         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1563                         "sending 3/4 msg of 4-Way Handshake");
1564         if (sm->wpa == WPA_VERSION_WPA2) {
1565                 /* WPA2 send GTK in the 4-way handshake */
1566                 secure = 1;
1567                 gtk = gsm->GTK[gsm->GN - 1];
1568                 gtk_len = gsm->GTK_len;
1569                 keyidx = gsm->GN;
1570                 _rsc = rsc;
1571                 encr = 1;
1572         } else {
1573                 /* WPA does not include GTK in msg 3/4 */
1574                 secure = 0;
1575                 gtk = NULL;
1576                 gtk_len = 0;
1577                 keyidx = 0;
1578                 _rsc = NULL;
1579         }
1580
1581         kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
1582         if (gtk)
1583                 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
1584         kde = os_malloc(kde_len);
1585         if (kde == NULL)
1586                 return;
1587
1588         pos = kde;
1589         os_memcpy(pos, wpa_ie, wpa_ie_len);
1590         pos += wpa_ie_len;
1591         if (gtk) {
1592                 u8 hdr[2];
1593                 hdr[0] = keyidx & 0x03;
1594                 hdr[1] = 0;
1595                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1596                                   gtk, gtk_len);
1597         }
1598         pos = ieee80211w_kde_add(sm, pos);
1599
1600         wpa_send_eapol(sm->wpa_auth, sm,
1601                        (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
1602                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
1603                        WPA_KEY_INFO_KEY_TYPE,
1604                        _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
1605         os_free(kde);
1606 }
1607
1608
1609 SM_STATE(WPA_PTK, PTKINITDONE)
1610 {
1611         SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
1612         sm->EAPOLKeyReceived = FALSE;
1613         if (sm->Pair) {
1614                 wpa_alg alg;
1615                 int klen;
1616                 if (sm->pairwise == WPA_CIPHER_TKIP) {
1617                         alg = WPA_ALG_TKIP;
1618                         klen = 32;
1619                 } else {
1620                         alg = WPA_ALG_CCMP;
1621                         klen = 16;
1622                 }
1623                 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
1624                                      sm->PTK.tk1, klen)) {
1625                         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1626                         return;
1627                 }
1628                 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
1629                 sm->pairwise_set = TRUE;
1630
1631                 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
1632                         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1633                         eloop_register_timeout(sm->wpa_auth->conf.
1634                                                wpa_ptk_rekey, 0, wpa_rekey_ptk,
1635                                                sm->wpa_auth, sm);
1636                 }
1637
1638                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1639                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1640                                            WPA_EAPOL_authorized, 1);
1641                 }
1642         }
1643
1644         if (0 /* IBSS == TRUE */) {
1645                 sm->keycount++;
1646                 if (sm->keycount == 2) {
1647                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1648                                            WPA_EAPOL_portValid, 1);
1649                 }
1650         } else {
1651                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
1652                                    1);
1653         }
1654         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
1655         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
1656         if (sm->wpa == WPA_VERSION_WPA)
1657                 sm->PInitAKeys = TRUE;
1658         else
1659                 sm->has_GTK = TRUE;
1660         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1661                          "pairwise key handshake completed (%s)",
1662                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1663
1664 #ifdef CONFIG_IEEE80211R
1665         wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
1666 #endif /* CONFIG_IEEE80211R */
1667 }
1668
1669
1670 SM_STEP(WPA_PTK)
1671 {
1672         struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1673
1674         if (sm->Init)
1675                 SM_ENTER(WPA_PTK, INITIALIZE);
1676         else if (sm->Disconnect
1677                  /* || FIX: dot11RSNAConfigSALifetime timeout */)
1678                 SM_ENTER(WPA_PTK, DISCONNECT);
1679         else if (sm->DeauthenticationRequest)
1680                 SM_ENTER(WPA_PTK, DISCONNECTED);
1681         else if (sm->AuthenticationRequest)
1682                 SM_ENTER(WPA_PTK, AUTHENTICATION);
1683         else if (sm->ReAuthenticationRequest)
1684                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1685         else if (sm->PTKRequest)
1686                 SM_ENTER(WPA_PTK, PTKSTART);
1687         else switch (sm->wpa_ptk_state) {
1688         case WPA_PTK_INITIALIZE:
1689                 break;
1690         case WPA_PTK_DISCONNECT:
1691                 SM_ENTER(WPA_PTK, DISCONNECTED);
1692                 break;
1693         case WPA_PTK_DISCONNECTED:
1694                 SM_ENTER(WPA_PTK, INITIALIZE);
1695                 break;
1696         case WPA_PTK_AUTHENTICATION:
1697                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
1698                 break;
1699         case WPA_PTK_AUTHENTICATION2:
1700                 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1701                     wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1702                                        WPA_EAPOL_keyRun) > 0)
1703                         SM_ENTER(WPA_PTK, INITPMK);
1704                 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
1705                          /* FIX: && 802.1X::keyRun */)
1706                         SM_ENTER(WPA_PTK, INITPSK);
1707                 break;
1708         case WPA_PTK_INITPMK:
1709                 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
1710                                        WPA_EAPOL_keyAvailable) > 0)
1711                         SM_ENTER(WPA_PTK, PTKSTART);
1712                 else {
1713                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1714                         SM_ENTER(WPA_PTK, DISCONNECT);
1715                 }
1716                 break;
1717         case WPA_PTK_INITPSK:
1718                 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, NULL))
1719                         SM_ENTER(WPA_PTK, PTKSTART);
1720                 else {
1721                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1722                                         "no PSK configured for the STA");
1723                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1724                         SM_ENTER(WPA_PTK, DISCONNECT);
1725                 }
1726                 break;
1727         case WPA_PTK_PTKSTART:
1728                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1729                     sm->EAPOLKeyPairwise)
1730                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1731                 else if (sm->TimeoutCtr >
1732                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1733                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1734                         SM_ENTER(WPA_PTK, DISCONNECT);
1735                 } else if (sm->TimeoutEvt)
1736                         SM_ENTER(WPA_PTK, PTKSTART);
1737                 break;
1738         case WPA_PTK_PTKCALCNEGOTIATING:
1739                 if (sm->MICVerified)
1740                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
1741                 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1742                          sm->EAPOLKeyPairwise)
1743                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
1744                 else if (sm->TimeoutEvt)
1745                         SM_ENTER(WPA_PTK, PTKSTART);
1746                 break;
1747         case WPA_PTK_PTKCALCNEGOTIATING2:
1748                 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1749                 break;
1750         case WPA_PTK_PTKINITNEGOTIATING:
1751                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1752                     sm->EAPOLKeyPairwise && sm->MICVerified)
1753                         SM_ENTER(WPA_PTK, PTKINITDONE);
1754                 else if (sm->TimeoutCtr >
1755                          (int) dot11RSNAConfigPairwiseUpdateCount) {
1756                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
1757                         SM_ENTER(WPA_PTK, DISCONNECT);
1758                 } else if (sm->TimeoutEvt)
1759                         SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
1760                 break;
1761         case WPA_PTK_PTKINITDONE:
1762                 break;
1763         }
1764 }
1765
1766
1767 SM_STATE(WPA_PTK_GROUP, IDLE)
1768 {
1769         SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
1770         if (sm->Init) {
1771                 /* Init flag is not cleared here, so avoid busy
1772                  * loop by claiming nothing changed. */
1773                 sm->changed = FALSE;
1774         }
1775         sm->GTimeoutCtr = 0;
1776 }
1777
1778
1779 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
1780 {
1781         u8 rsc[WPA_KEY_RSC_LEN];
1782         struct wpa_group *gsm = sm->group;
1783         u8 *kde, *pos, hdr[2];
1784         size_t kde_len;
1785
1786         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
1787
1788         sm->GTimeoutCtr++;
1789         if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
1790                 /* No point in sending the EAPOL-Key - we will disconnect
1791                  * immediately following this. */
1792                 return;
1793         }
1794
1795         if (sm->wpa == WPA_VERSION_WPA)
1796                 sm->PInitAKeys = FALSE;
1797         sm->TimeoutEvt = FALSE;
1798         /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
1799         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
1800         if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
1801                 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
1802         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1803                         "sending 1/2 msg of Group Key Handshake");
1804
1805         if (sm->wpa == WPA_VERSION_WPA2) {
1806                 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
1807                         ieee80211w_kde_len(sm);
1808                 kde = os_malloc(kde_len);
1809                 if (kde == NULL)
1810                         return;
1811
1812                 pos = kde;
1813                 hdr[0] = gsm->GN & 0x03;
1814                 hdr[1] = 0;
1815                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
1816                                   gsm->GTK[gsm->GN - 1], gsm->GTK_len);
1817                 pos = ieee80211w_kde_add(sm, pos);
1818         } else {
1819                 kde = gsm->GTK[gsm->GN - 1];
1820                 pos = kde + gsm->GTK_len;
1821         }
1822
1823         wpa_send_eapol(sm->wpa_auth, sm,
1824                        WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
1825                        WPA_KEY_INFO_ACK |
1826                        (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
1827                        rsc, gsm->GNonce, kde, pos - kde, gsm->GN, 1);
1828         if (sm->wpa == WPA_VERSION_WPA2)
1829                 os_free(kde);
1830 }
1831
1832
1833 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
1834 {
1835         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
1836         sm->EAPOLKeyReceived = FALSE;
1837         if (sm->GUpdateStationKeys)
1838                 sm->group->GKeyDoneStations--;
1839         sm->GUpdateStationKeys = FALSE;
1840         sm->GTimeoutCtr = 0;
1841         /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
1842         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
1843                          "group key handshake completed (%s)",
1844                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
1845         sm->has_GTK = TRUE;
1846 }
1847
1848
1849 SM_STATE(WPA_PTK_GROUP, KEYERROR)
1850 {
1851         SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
1852         if (sm->GUpdateStationKeys)
1853                 sm->group->GKeyDoneStations--;
1854         sm->GUpdateStationKeys = FALSE;
1855         sm->Disconnect = TRUE;
1856 }
1857
1858
1859 SM_STEP(WPA_PTK_GROUP)
1860 {
1861         if (sm->Init || sm->PtkGroupInit) {
1862                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1863                 sm->PtkGroupInit = FALSE;
1864         } else switch (sm->wpa_ptk_group_state) {
1865         case WPA_PTK_GROUP_IDLE:
1866                 if (sm->GUpdateStationKeys ||
1867                     (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
1868                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1869                 break;
1870         case WPA_PTK_GROUP_REKEYNEGOTIATING:
1871                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
1872                     !sm->EAPOLKeyPairwise && sm->MICVerified)
1873                         SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
1874                 else if (sm->GTimeoutCtr >
1875                          (int) dot11RSNAConfigGroupUpdateCount)
1876                         SM_ENTER(WPA_PTK_GROUP, KEYERROR);
1877                 else if (sm->TimeoutEvt)
1878                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
1879                 break;
1880         case WPA_PTK_GROUP_KEYERROR:
1881                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1882                 break;
1883         case WPA_PTK_GROUP_REKEYESTABLISHED:
1884                 SM_ENTER(WPA_PTK_GROUP, IDLE);
1885                 break;
1886         }
1887 }
1888
1889
1890 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
1891                           struct wpa_group *group)
1892 {
1893         int ret = 0;
1894
1895         /* FIX: is this the correct way of getting GNonce? */
1896         os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
1897         inc_byte_array(group->Counter, WPA_NONCE_LEN);
1898         wpa_gmk_to_gtk(group->GMK, wpa_auth->addr, group->GNonce,
1899                        group->GTK[group->GN - 1], group->GTK_len);
1900
1901 #ifdef CONFIG_IEEE80211W
1902         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
1903                 if (os_get_random(group->IGTK[group->GN_igtk - 4],
1904                                   WPA_IGTK_LEN) < 0) {
1905                         wpa_printf(MSG_INFO, "RSN: Failed to get new random "
1906                                    "IGTK");
1907                         ret = -1;
1908                 }
1909                 wpa_hexdump_key(MSG_DEBUG, "IGTK",
1910                                 group->IGTK[group->GN_igtk - 4], WPA_IGTK_LEN);
1911         }
1912 #endif /* CONFIG_IEEE80211W */
1913
1914         return ret;
1915 }
1916
1917
1918 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
1919                                struct wpa_group *group)
1920 {
1921         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1922                    "GTK_INIT (VLAN-ID %d)", group->vlan_id);
1923         group->changed = FALSE; /* GInit is not cleared here; avoid loop */
1924         group->wpa_group_state = WPA_GROUP_GTK_INIT;
1925
1926         /* GTK[0..N] = 0 */
1927         os_memset(group->GTK, 0, sizeof(group->GTK));
1928         group->GN = 1;
1929         group->GM = 2;
1930 #ifdef CONFIG_IEEE80211W
1931         group->GN_igtk = 4;
1932         group->GM_igtk = 5;
1933 #endif /* CONFIG_IEEE80211W */
1934         /* GTK[GN] = CalcGTK() */
1935         wpa_gtk_update(wpa_auth, group);
1936 }
1937
1938
1939 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
1940 {
1941         if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
1942                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1943                                 "Not in PTKINITDONE; skip Group Key update");
1944                 return 0;
1945         }
1946         if (sm->GUpdateStationKeys) {
1947                 /*
1948                  * This should not really happen, but just in case, make sure
1949                  * we do not count the same STA twice in GKeyDoneStations.
1950                  */
1951                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1952                                 "GUpdateStationKeys already set - do not "
1953                                 "increment GKeyDoneStations");
1954         } else {
1955                 sm->group->GKeyDoneStations++;
1956                 sm->GUpdateStationKeys = TRUE;
1957         }
1958         wpa_sm_step(sm);
1959         return 0;
1960 }
1961
1962
1963 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
1964                               struct wpa_group *group)
1965 {
1966         int tmp;
1967
1968         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1969                    "SETKEYS (VLAN-ID %d)", group->vlan_id);
1970         group->changed = TRUE;
1971         group->wpa_group_state = WPA_GROUP_SETKEYS;
1972         group->GTKReKey = FALSE;
1973         tmp = group->GM;
1974         group->GM = group->GN;
1975         group->GN = tmp;
1976 #ifdef CONFIG_IEEE80211W
1977         tmp = group->GM_igtk;
1978         group->GM_igtk = group->GN_igtk;
1979         group->GN_igtk = tmp;
1980 #endif /* CONFIG_IEEE80211W */
1981         /* "GKeyDoneStations = GNoStations" is done in more robust way by
1982          * counting the STAs that are marked with GUpdateStationKeys instead of
1983          * including all STAs that could be in not-yet-completed state. */
1984         wpa_gtk_update(wpa_auth, group);
1985
1986         wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, NULL);
1987         wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
1988                    group->GKeyDoneStations);
1989 }
1990
1991
1992 static void wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
1993                                   struct wpa_group *group)
1994 {
1995         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
1996                    "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
1997         group->changed = TRUE;
1998         group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
1999         wpa_auth_set_key(wpa_auth, group->vlan_id,
2000                          wpa_alg_enum(wpa_auth->conf.wpa_group),
2001                          NULL, group->GN, group->GTK[group->GN - 1],
2002                          group->GTK_len);
2003
2004 #ifdef CONFIG_IEEE80211W
2005         if (wpa_auth->conf.ieee80211w != WPA_NO_IEEE80211W) {
2006                 wpa_auth_set_key(wpa_auth, group->vlan_id, WPA_ALG_IGTK,
2007                                  NULL, group->GN_igtk,
2008                                  group->IGTK[group->GN_igtk - 4],
2009                                  WPA_IGTK_LEN);
2010         }
2011 #endif /* CONFIG_IEEE80211W */
2012 }
2013
2014
2015 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2016                               struct wpa_group *group)
2017 {
2018         if (group->GInit) {
2019                 wpa_group_gtk_init(wpa_auth, group);
2020         } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2021                    group->GTKAuthenticator) {
2022                 wpa_group_setkeysdone(wpa_auth, group);
2023         } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2024                    group->GTKReKey) {
2025                 wpa_group_setkeys(wpa_auth, group);
2026         } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2027                 if (group->GKeyDoneStations == 0)
2028                         wpa_group_setkeysdone(wpa_auth, group);
2029                 else if (group->GTKReKey)
2030                         wpa_group_setkeys(wpa_auth, group);
2031         }
2032 }
2033
2034
2035 static void wpa_sm_step(struct wpa_state_machine *sm)
2036 {
2037         if (sm == NULL)
2038                 return;
2039
2040         if (sm->in_step_loop) {
2041                 /* This should not happen, but if it does, make sure we do not
2042                  * end up freeing the state machine too early by exiting the
2043                  * recursive call. */
2044                 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2045                 return;
2046         }
2047
2048         sm->in_step_loop = 1;
2049         do {
2050                 if (sm->pending_deinit)
2051                         break;
2052
2053                 sm->changed = FALSE;
2054                 sm->wpa_auth->group->changed = FALSE;
2055
2056                 SM_STEP_RUN(WPA_PTK);
2057                 if (sm->pending_deinit)
2058                         break;
2059                 SM_STEP_RUN(WPA_PTK_GROUP);
2060                 if (sm->pending_deinit)
2061                         break;
2062                 wpa_group_sm_step(sm->wpa_auth, sm->group);
2063         } while (sm->changed || sm->wpa_auth->group->changed);
2064         sm->in_step_loop = 0;
2065
2066         if (sm->pending_deinit) {
2067                 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2068                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
2069                 wpa_free_sta_sm(sm);
2070         }
2071 }
2072
2073
2074 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2075 {
2076         struct wpa_state_machine *sm = eloop_ctx;
2077         wpa_sm_step(sm);
2078 }
2079
2080
2081 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2082 {
2083         if (sm == NULL)
2084                 return;
2085         eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2086 }
2087
2088
2089 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2090 {
2091         int tmp, i;
2092         struct wpa_group *group;
2093
2094         if (wpa_auth == NULL)
2095                 return;
2096
2097         group = wpa_auth->group;
2098
2099         for (i = 0; i < 2; i++) {
2100                 tmp = group->GM;
2101                 group->GM = group->GN;
2102                 group->GN = tmp;
2103 #ifdef CONFIG_IEEE80211W
2104                 tmp = group->GM_igtk;
2105                 group->GM_igtk = group->GN_igtk;
2106                 group->GN_igtk = tmp;
2107 #endif /* CONFIG_IEEE80211W */
2108                 wpa_gtk_update(wpa_auth, group);
2109         }
2110 }
2111
2112
2113 static const char * wpa_bool_txt(int bool)
2114 {
2115         return bool ? "TRUE" : "FALSE";
2116 }
2117
2118
2119 static int wpa_cipher_bits(int cipher)
2120 {
2121         switch (cipher) {
2122         case WPA_CIPHER_CCMP:
2123                 return 128;
2124         case WPA_CIPHER_TKIP:
2125                 return 256;
2126         case WPA_CIPHER_WEP104:
2127                 return 104;
2128         case WPA_CIPHER_WEP40:
2129                 return 40;
2130         default:
2131                 return 0;
2132         }
2133 }
2134
2135
2136 #define RSN_SUITE "%02x-%02x-%02x-%d"
2137 #define RSN_SUITE_ARG(s) \
2138 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2139
2140 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2141 {
2142         int len = 0, ret;
2143         char pmkid_txt[PMKID_LEN * 2 + 1];
2144
2145         if (wpa_auth == NULL)
2146                 return len;
2147
2148         ret = os_snprintf(buf + len, buflen - len,
2149                           "dot11RSNAOptionImplemented=TRUE\n"
2150 #ifdef CONFIG_RSN_PREAUTH
2151                           "dot11RSNAPreauthenticationImplemented=TRUE\n"
2152 #else /* CONFIG_RSN_PREAUTH */
2153                           "dot11RSNAPreauthenticationImplemented=FALSE\n"
2154 #endif /* CONFIG_RSN_PREAUTH */
2155                           "dot11RSNAEnabled=%s\n"
2156                           "dot11RSNAPreauthenticationEnabled=%s\n",
2157                           wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
2158                           wpa_bool_txt(wpa_auth->conf.rsn_preauth));
2159         if (ret < 0 || (size_t) ret >= buflen - len)
2160                 return len;
2161         len += ret;
2162
2163         wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
2164                          wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
2165
2166         ret = os_snprintf(
2167                 buf + len, buflen - len,
2168                 "dot11RSNAConfigVersion=%u\n"
2169                 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
2170                 /* FIX: dot11RSNAConfigGroupCipher */
2171                 /* FIX: dot11RSNAConfigGroupRekeyMethod */
2172                 /* FIX: dot11RSNAConfigGroupRekeyTime */
2173                 /* FIX: dot11RSNAConfigGroupRekeyPackets */
2174                 "dot11RSNAConfigGroupRekeyStrict=%u\n"
2175                 "dot11RSNAConfigGroupUpdateCount=%u\n"
2176                 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
2177                 "dot11RSNAConfigGroupCipherSize=%u\n"
2178                 "dot11RSNAConfigPMKLifetime=%u\n"
2179                 "dot11RSNAConfigPMKReauthThreshold=%u\n"
2180                 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
2181                 "dot11RSNAConfigSATimeout=%u\n"
2182                 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
2183                 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
2184                 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
2185                 "dot11RSNAPMKIDUsed=%s\n"
2186                 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
2187                 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
2188                 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
2189                 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
2190                 "dot11RSNA4WayHandshakeFailures=%u\n"
2191                 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
2192                 RSN_VERSION,
2193                 !!wpa_auth->conf.wpa_strict_rekey,
2194                 dot11RSNAConfigGroupUpdateCount,
2195                 dot11RSNAConfigPairwiseUpdateCount,
2196                 wpa_cipher_bits(wpa_auth->conf.wpa_group),
2197                 dot11RSNAConfigPMKLifetime,
2198                 dot11RSNAConfigPMKReauthThreshold,
2199                 dot11RSNAConfigSATimeout,
2200                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
2201                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
2202                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
2203                 pmkid_txt,
2204                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
2205                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
2206                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
2207                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
2208                 wpa_auth->dot11RSNA4WayHandshakeFailures);
2209         if (ret < 0 || (size_t) ret >= buflen - len)
2210                 return len;
2211         len += ret;
2212
2213         /* TODO: dot11RSNAConfigPairwiseCiphersTable */
2214         /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
2215
2216         /* Private MIB */
2217         ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
2218                           wpa_auth->group->wpa_group_state);
2219         if (ret < 0 || (size_t) ret >= buflen - len)
2220                 return len;
2221         len += ret;
2222
2223         return len;
2224 }
2225
2226
2227 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
2228 {
2229         int len = 0, ret;
2230         u32 pairwise = 0;
2231
2232         if (sm == NULL)
2233                 return 0;
2234
2235         /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
2236
2237         /* dot11RSNAStatsEntry */
2238
2239         if (sm->wpa == WPA_VERSION_WPA) {
2240                 if (sm->pairwise == WPA_CIPHER_CCMP)
2241                         pairwise = WPA_CIPHER_SUITE_CCMP;
2242                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2243                         pairwise = WPA_CIPHER_SUITE_TKIP;
2244                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2245                         pairwise = WPA_CIPHER_SUITE_WEP104;
2246                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2247                         pairwise = WPA_CIPHER_SUITE_WEP40;
2248                 else if (sm->pairwise == WPA_CIPHER_NONE)
2249                         pairwise = WPA_CIPHER_SUITE_NONE;
2250         } else if (sm->wpa == WPA_VERSION_WPA2) {
2251                 if (sm->pairwise == WPA_CIPHER_CCMP)
2252                         pairwise = RSN_CIPHER_SUITE_CCMP;
2253                 else if (sm->pairwise == WPA_CIPHER_TKIP)
2254                         pairwise = RSN_CIPHER_SUITE_TKIP;
2255                 else if (sm->pairwise == WPA_CIPHER_WEP104)
2256                         pairwise = RSN_CIPHER_SUITE_WEP104;
2257                 else if (sm->pairwise == WPA_CIPHER_WEP40)
2258                         pairwise = RSN_CIPHER_SUITE_WEP40;
2259                 else if (sm->pairwise == WPA_CIPHER_NONE)
2260                         pairwise = RSN_CIPHER_SUITE_NONE;
2261         } else
2262                 return 0;
2263
2264         ret = os_snprintf(
2265                 buf + len, buflen - len,
2266                 /* TODO: dot11RSNAStatsIndex */
2267                 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
2268                 "dot11RSNAStatsVersion=1\n"
2269                 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
2270                 /* TODO: dot11RSNAStatsTKIPICVErrors */
2271                 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
2272                 "dot11RSNAStatsTKIPRemoveMICFailures=%u\n"
2273                 /* TODO: dot11RSNAStatsCCMPReplays */
2274                 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
2275                 /* TODO: dot11RSNAStatsTKIPReplays */,
2276                 MAC2STR(sm->addr),
2277                 RSN_SUITE_ARG(pairwise),
2278                 sm->dot11RSNAStatsTKIPLocalMICFailures,
2279                 sm->dot11RSNAStatsTKIPRemoteMICFailures);
2280         if (ret < 0 || (size_t) ret >= buflen - len)
2281                 return len;
2282         len += ret;
2283
2284         /* Private MIB */
2285         ret = os_snprintf(buf + len, buflen - len,
2286                           "hostapdWPAPTKState=%d\n"
2287                           "hostapdWPAPTKGroupState=%d\n",
2288                           sm->wpa_ptk_state,
2289                           sm->wpa_ptk_group_state);
2290         if (ret < 0 || (size_t) ret >= buflen - len)
2291                 return len;
2292         len += ret;
2293
2294         return len;
2295 }
2296
2297
2298 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
2299 {
2300         if (wpa_auth)
2301                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
2302 }
2303
2304
2305 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
2306 {
2307         return sm && sm->pairwise_set;
2308 }
2309
2310
2311 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
2312 {
2313         return sm->pairwise;
2314 }
2315
2316
2317 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
2318 {
2319         if (sm == NULL)
2320                 return -1;
2321         return sm->wpa_key_mgmt;
2322 }
2323
2324
2325 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
2326 {
2327         if (sm == NULL)
2328                 return 0;
2329         return sm->wpa;
2330 }
2331
2332
2333 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
2334                              struct rsn_pmksa_cache_entry *entry)
2335 {
2336         if (sm == NULL || sm->pmksa != entry)
2337                 return -1;
2338         sm->pmksa = NULL;
2339         return 0;
2340 }
2341
2342
2343 struct rsn_pmksa_cache_entry *
2344 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
2345 {
2346         return sm ? sm->pmksa : NULL;
2347 }
2348
2349
2350 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
2351 {
2352         if (sm)
2353                 sm->dot11RSNAStatsTKIPLocalMICFailures++;
2354 }
2355
2356
2357 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
2358 {
2359         if (wpa_auth == NULL)
2360                 return NULL;
2361         *len = wpa_auth->wpa_ie_len;
2362         return wpa_auth->wpa_ie;
2363 }
2364
2365
2366 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
2367                        int session_timeout, struct eapol_state_machine *eapol)
2368 {
2369         if (sm == NULL || sm->wpa != WPA_VERSION_WPA2)
2370                 return -1;
2371
2372         if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
2373                                  sm->wpa_auth->addr, sm->addr, session_timeout,
2374                                  eapol, sm->wpa_key_mgmt))
2375                 return 0;
2376
2377         return -1;
2378 }
2379
2380
2381 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
2382                                const u8 *pmk, size_t len, const u8 *sta_addr,
2383                                int session_timeout,
2384                                struct eapol_state_machine *eapol)
2385 {
2386         if (wpa_auth == NULL)
2387                 return -1;
2388
2389         if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len, wpa_auth->addr,
2390                                  sta_addr, session_timeout, eapol,
2391                                  WPA_KEY_MGMT_IEEE8021X))
2392                 return 0;
2393
2394         return -1;
2395 }
2396
2397
2398 static struct wpa_group *
2399 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
2400 {
2401         struct wpa_group *group;
2402
2403         if (wpa_auth == NULL || wpa_auth->group == NULL)
2404                 return NULL;
2405
2406         wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
2407                    vlan_id);
2408         group = wpa_group_init(wpa_auth, vlan_id);
2409         if (group == NULL)
2410                 return NULL;
2411
2412         group->next = wpa_auth->group->next;
2413         wpa_auth->group->next = group;
2414
2415         return group;
2416 }
2417
2418
2419 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
2420 {
2421         struct wpa_group *group;
2422
2423         if (sm == NULL || sm->wpa_auth == NULL)
2424                 return 0;
2425
2426         group = sm->wpa_auth->group;
2427         while (group) {
2428                 if (group->vlan_id == vlan_id)
2429                         break;
2430                 group = group->next;
2431         }
2432
2433         if (group == NULL) {
2434                 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
2435                 if (group == NULL)
2436                         return -1;
2437         }
2438
2439         if (sm->group == group)
2440                 return 0;
2441
2442         wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
2443                    "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
2444
2445         sm->group = group;
2446         return 0;
2447 }
2448
2449 #endif /* CONFIG_NATIVE_WINDOWS */