contrib/wpa/src/ap/wpa_auth.c

   1 /*
   2  * IEEE 802.11 RSN / WPA Authenticator
   3  * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "utils/state_machine.h"
  14 #include "utils/bitfield.h"
  15 #include "common/ieee802_11_defs.h"
  16 #include "crypto/aes_wrap.h"
  17 #include "crypto/crypto.h"
  18 #include "crypto/sha1.h"
  19 #include "crypto/sha256.h"
  20 #include "crypto/random.h"
  21 #include "eapol_auth/eapol_auth_sm.h"
  22 #include "ap_config.h"
  23 #include "ieee802_11.h"
  24 #include "wpa_auth.h"
  25 #include "pmksa_cache_auth.h"
  26 #include "wpa_auth_i.h"
  27 #include "wpa_auth_ie.h"
  28
  29 #define STATE_MACHINE_DATA struct wpa_state_machine
  30 #define STATE_MACHINE_DEBUG_PREFIX "WPA"
  31 #define STATE_MACHINE_ADDR sm->addr
  32
  33
  34 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx);
  35 static int wpa_sm_step(struct wpa_state_machine *sm);
  36 static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
  37                               size_t data_len);
  38 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx);
  39 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
  40                               struct wpa_group *group);
  41 static void wpa_request_new_ptk(struct wpa_state_machine *sm);
  42 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
  43                           struct wpa_group *group);
  44 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
  45                                        struct wpa_group *group);
  46 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
  47                           const u8 *pmk, struct wpa_ptk *ptk);
  48
  49 static const u32 dot11RSNAConfigGroupUpdateCount = 4;
  50 static const u32 dot11RSNAConfigPairwiseUpdateCount = 4;
  51 static const u32 eapol_key_timeout_first = 100; /* ms */
  52 static const u32 eapol_key_timeout_subseq = 1000; /* ms */
  53 static const u32 eapol_key_timeout_first_group = 500; /* ms */
  54
  55 /* TODO: make these configurable */
  56 static const int dot11RSNAConfigPMKLifetime = 43200;
  57 static const int dot11RSNAConfigPMKReauthThreshold = 70;
  58 static const int dot11RSNAConfigSATimeout = 60;
  59
  60
  61 static inline int wpa_auth_mic_failure_report(
  62         struct wpa_authenticator *wpa_auth, const u8 *addr)
  63 {
  64         if (wpa_auth->cb.mic_failure_report)
  65                 return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
  66         return 0;
  67 }
  68
  69
  70 static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
  71                                       const u8 *addr, wpa_eapol_variable var,
  72                                       int value)
  73 {
  74         if (wpa_auth->cb.set_eapol)
  75                 wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
  76 }
  77
  78
  79 static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
  80                                      const u8 *addr, wpa_eapol_variable var)
  81 {
  82         if (wpa_auth->cb.get_eapol == NULL)
  83                 return -1;
  84         return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
  85 }
  86
  87
  88 static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
  89                                           const u8 *addr,
  90                                           const u8 *p2p_dev_addr,
  91                                           const u8 *prev_psk)
  92 {
  93         if (wpa_auth->cb.get_psk == NULL)
  94                 return NULL;
  95         return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
  96                                     prev_psk);
  97 }
  98
  99
 100 static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
 101                                    const u8 *addr, u8 *msk, size_t *len)
 102 {
 103         if (wpa_auth->cb.get_msk == NULL)
 104                 return -1;
 105         return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
 106 }
 107
 108
 109 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 110                                    int vlan_id,
 111                                    enum wpa_alg alg, const u8 *addr, int idx,
 112                                    u8 *key, size_t key_len)
 113 {
 114         if (wpa_auth->cb.set_key == NULL)
 115                 return -1;
 116         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 117                                     key, key_len);
 118 }
 119
 120
 121 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 122                                       const u8 *addr, int idx, u8 *seq)
 123 {
 124         if (wpa_auth->cb.get_seqnum == NULL)
 125                 return -1;
 126         return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
 127 }
 128
 129
 130 static inline int
 131 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
 132                     const u8 *data, size_t data_len, int encrypt)
 133 {
 134         if (wpa_auth->cb.send_eapol == NULL)
 135                 return -1;
 136         return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
 137                                        encrypt);
 138 }
 139
 140
 141 #ifdef CONFIG_MESH
 142 static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
 143                                       const u8 *addr)
 144 {
 145         if (wpa_auth->cb.start_ampe == NULL)
 146                 return -1;
 147         return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr);
 148 }
 149 #endif /* CONFIG_MESH */
 150
 151
 152 int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
 153                           int (*cb)(struct wpa_state_machine *sm, void *ctx),
 154                           void *cb_ctx)
 155 {
 156         if (wpa_auth->cb.for_each_sta == NULL)
 157                 return 0;
 158         return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
 159 }
 160
 161
 162 int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
 163                            int (*cb)(struct wpa_authenticator *a, void *ctx),
 164                            void *cb_ctx)
 165 {
 166         if (wpa_auth->cb.for_each_auth == NULL)
 167                 return 0;
 168         return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
 169 }
 170
 171
 172 void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 173                      logger_level level, const char *txt)
 174 {
 175         if (wpa_auth->cb.logger == NULL)
 176                 return;
 177         wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
 178 }
 179
 180
 181 void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
 182                       logger_level level, const char *fmt, ...)
 183 {
 184         char *format;
 185         int maxlen;
 186         va_list ap;
 187
 188         if (wpa_auth->cb.logger == NULL)
 189                 return;
 190
 191         maxlen = os_strlen(fmt) + 100;
 192         format = os_malloc(maxlen);
 193         if (!format)
 194                 return;
 195
 196         va_start(ap, fmt);
 197         vsnprintf(format, maxlen, fmt, ap);
 198         va_end(ap);
 199
 200         wpa_auth_logger(wpa_auth, addr, level, format);
 201
 202         os_free(format);
 203 }
 204
 205
 206 static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
 207                                const u8 *addr)
 208 {
 209         if (wpa_auth->cb.disconnect == NULL)
 210                 return;
 211         wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
 212         wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
 213                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
 214 }
 215
 216
 217 static int wpa_use_aes_cmac(struct wpa_state_machine *sm)
 218 {
 219         int ret = 0;
 220 #ifdef CONFIG_IEEE80211R
 221         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
 222                 ret = 1;
 223 #endif /* CONFIG_IEEE80211R */
 224 #ifdef CONFIG_IEEE80211W
 225         if (wpa_key_mgmt_sha256(sm->wpa_key_mgmt))
 226                 ret = 1;
 227 #endif /* CONFIG_IEEE80211W */
 228         if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN)
 229                 ret = 1;
 230         return ret;
 231 }
 232
 233
 234 static void wpa_rekey_gmk(void *eloop_ctx, void *timeout_ctx)
 235 {
 236         struct wpa_authenticator *wpa_auth = eloop_ctx;
 237
 238         if (random_get_bytes(wpa_auth->group->GMK, WPA_GMK_LEN)) {
 239                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 240                            "initialization.");
 241         } else {
 242                 wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "GMK rekeyd");
 243                 wpa_hexdump_key(MSG_DEBUG, "GMK",
 244                                 wpa_auth->group->GMK, WPA_GMK_LEN);
 245         }
 246
 247         if (wpa_auth->conf.wpa_gmk_rekey) {
 248                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 249                                        wpa_rekey_gmk, wpa_auth, NULL);
 250         }
 251 }
 252
 253
 254 static void wpa_rekey_gtk(void *eloop_ctx, void *timeout_ctx)
 255 {
 256         struct wpa_authenticator *wpa_auth = eloop_ctx;
 257         struct wpa_group *group;
 258
 259         wpa_auth_logger(wpa_auth, NULL, LOGGER_DEBUG, "rekeying GTK");
 260         for (group = wpa_auth->group; group; group = group->next) {
 261                 group->GTKReKey = TRUE;
 262                 do {
 263                         group->changed = FALSE;
 264                         wpa_group_sm_step(wpa_auth, group);
 265                 } while (group->changed);
 266         }
 267
 268         if (wpa_auth->conf.wpa_group_rekey) {
 269                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey,
 270                                        0, wpa_rekey_gtk, wpa_auth, NULL);
 271         }
 272 }
 273
 274
 275 static void wpa_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
 276 {
 277         struct wpa_authenticator *wpa_auth = eloop_ctx;
 278         struct wpa_state_machine *sm = timeout_ctx;
 279
 280         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "rekeying PTK");
 281         wpa_request_new_ptk(sm);
 282         wpa_sm_step(sm);
 283 }
 284
 285
 286 static int wpa_auth_pmksa_clear_cb(struct wpa_state_machine *sm, void *ctx)
 287 {
 288         if (sm->pmksa == ctx)
 289                 sm->pmksa = NULL;
 290         return 0;
 291 }
 292
 293
 294 static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
 295                                    void *ctx)
 296 {
 297         struct wpa_authenticator *wpa_auth = ctx;
 298         wpa_auth_for_each_sta(wpa_auth, wpa_auth_pmksa_clear_cb, entry);
 299 }
 300
 301
 302 static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
 303                                           struct wpa_group *group)
 304 {
 305         u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
 306         u8 rkey[32];
 307         unsigned long ptr;
 308
 309         if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
 310                 return -1;
 311         wpa_hexdump_key(MSG_DEBUG, "GMK", group->GMK, WPA_GMK_LEN);
 312
 313         /*
 314          * Counter = PRF-256(Random number, "Init Counter",
 315          *                   Local MAC Address || Time)
 316          */
 317         os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
 318         wpa_get_ntp_timestamp(buf + ETH_ALEN);
 319         ptr = (unsigned long) group;
 320         os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
 321         if (random_get_bytes(rkey, sizeof(rkey)) < 0)
 322                 return -1;
 323
 324         if (sha1_prf(rkey, sizeof(rkey), "Init Counter", buf, sizeof(buf),
 325                      group->Counter, WPA_NONCE_LEN) < 0)
 326                 return -1;
 327         wpa_hexdump_key(MSG_DEBUG, "Key Counter",
 328                         group->Counter, WPA_NONCE_LEN);
 329
 330         return 0;
 331 }
 332
 333
 334 static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
 335                                          int vlan_id, int delay_init)
 336 {
 337         struct wpa_group *group;
 338
 339         group = os_zalloc(sizeof(struct wpa_group));
 340         if (group == NULL)
 341                 return NULL;
 342
 343         group->GTKAuthenticator = TRUE;
 344         group->vlan_id = vlan_id;
 345         group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
 346
 347         if (random_pool_ready() != 1) {
 348                 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
 349                            "for secure operations - update keys later when "
 350                            "the first station connects");
 351         }
 352
 353         /*
 354          * Set initial GMK/Counter value here. The actual values that will be
 355          * used in negotiations will be set once the first station tries to
 356          * connect. This allows more time for collecting additional randomness
 357          * on embedded devices.
 358          */
 359         if (wpa_group_init_gmk_and_counter(wpa_auth, group) < 0) {
 360                 wpa_printf(MSG_ERROR, "Failed to get random data for WPA "
 361                            "initialization.");
 362                 os_free(group);
 363                 return NULL;
 364         }
 365
 366         group->GInit = TRUE;
 367         if (delay_init) {
 368                 wpa_printf(MSG_DEBUG, "WPA: Delay group state machine start "
 369                            "until Beacon frames have been configured");
 370                 /* Initialization is completed in wpa_init_keys(). */
 371         } else {
 372                 wpa_group_sm_step(wpa_auth, group);
 373                 group->GInit = FALSE;
 374                 wpa_group_sm_step(wpa_auth, group);
 375         }
 376
 377         return group;
 378 }
 379
 380
 381 /**
 382  * wpa_init - Initialize WPA authenticator
 383  * @addr: Authenticator address
 384  * @conf: Configuration for WPA authenticator
 385  * @cb: Callback functions for WPA authenticator
 386  * Returns: Pointer to WPA authenticator data or %NULL on failure
 387  */
 388 struct wpa_authenticator * wpa_init(const u8 *addr,
 389                                     struct wpa_auth_config *conf,
 390                                     struct wpa_auth_callbacks *cb)
 391 {
 392         struct wpa_authenticator *wpa_auth;
 393
 394         wpa_auth = os_zalloc(sizeof(struct wpa_authenticator));
 395         if (wpa_auth == NULL)
 396                 return NULL;
 397         os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
 398         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 399         os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
 400
 401         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 402                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 403                 os_free(wpa_auth);
 404                 return NULL;
 405         }
 406
 407         wpa_auth->group = wpa_group_init(wpa_auth, 0, 1);
 408         if (wpa_auth->group == NULL) {
 409                 os_free(wpa_auth->wpa_ie);
 410                 os_free(wpa_auth);
 411                 return NULL;
 412         }
 413
 414         wpa_auth->pmksa = pmksa_cache_auth_init(wpa_auth_pmksa_free_cb,
 415                                                 wpa_auth);
 416         if (wpa_auth->pmksa == NULL) {
 417                 wpa_printf(MSG_ERROR, "PMKSA cache initialization failed.");
 418                 os_free(wpa_auth->group);
 419                 os_free(wpa_auth->wpa_ie);
 420                 os_free(wpa_auth);
 421                 return NULL;
 422         }
 423
 424 #ifdef CONFIG_IEEE80211R
 425         wpa_auth->ft_pmk_cache = wpa_ft_pmk_cache_init();
 426         if (wpa_auth->ft_pmk_cache == NULL) {
 427                 wpa_printf(MSG_ERROR, "FT PMK cache initialization failed.");
 428                 os_free(wpa_auth->group);
 429                 os_free(wpa_auth->wpa_ie);
 430                 pmksa_cache_auth_deinit(wpa_auth->pmksa);
 431                 os_free(wpa_auth);
 432                 return NULL;
 433         }
 434 #endif /* CONFIG_IEEE80211R */
 435
 436         if (wpa_auth->conf.wpa_gmk_rekey) {
 437                 eloop_register_timeout(wpa_auth->conf.wpa_gmk_rekey, 0,
 438                                        wpa_rekey_gmk, wpa_auth, NULL);
 439         }
 440
 441         if (wpa_auth->conf.wpa_group_rekey) {
 442                 eloop_register_timeout(wpa_auth->conf.wpa_group_rekey, 0,
 443                                        wpa_rekey_gtk, wpa_auth, NULL);
 444         }
 445
 446 #ifdef CONFIG_P2P
 447         if (WPA_GET_BE32(conf->ip_addr_start)) {
 448                 int count = WPA_GET_BE32(conf->ip_addr_end) -
 449                         WPA_GET_BE32(conf->ip_addr_start) + 1;
 450                 if (count > 1000)
 451                         count = 1000;
 452                 if (count > 0)
 453                         wpa_auth->ip_pool = bitfield_alloc(count);
 454         }
 455 #endif /* CONFIG_P2P */
 456
 457         return wpa_auth;
 458 }
 459
 460
 461 int wpa_init_keys(struct wpa_authenticator *wpa_auth)
 462 {
 463         struct wpa_group *group = wpa_auth->group;
 464
 465         wpa_printf(MSG_DEBUG, "WPA: Start group state machine to set initial "
 466                    "keys");
 467         wpa_group_sm_step(wpa_auth, group);
 468         group->GInit = FALSE;
 469         wpa_group_sm_step(wpa_auth, group);
 470         if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
 471                 return -1;
 472         return 0;
 473 }
 474
 475
 476 /**
 477  * wpa_deinit - Deinitialize WPA authenticator
 478  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 479  */
 480 void wpa_deinit(struct wpa_authenticator *wpa_auth)
 481 {
 482         struct wpa_group *group, *prev;
 483
 484         eloop_cancel_timeout(wpa_rekey_gmk, wpa_auth, NULL);
 485         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
 486
 487 #ifdef CONFIG_PEERKEY
 488         while (wpa_auth->stsl_negotiations)
 489                 wpa_stsl_remove(wpa_auth, wpa_auth->stsl_negotiations);
 490 #endif /* CONFIG_PEERKEY */
 491
 492         pmksa_cache_auth_deinit(wpa_auth->pmksa);
 493
 494 #ifdef CONFIG_IEEE80211R
 495         wpa_ft_pmk_cache_deinit(wpa_auth->ft_pmk_cache);
 496         wpa_auth->ft_pmk_cache = NULL;
 497 #endif /* CONFIG_IEEE80211R */
 498
 499 #ifdef CONFIG_P2P
 500         bitfield_free(wpa_auth->ip_pool);
 501 #endif /* CONFIG_P2P */
 502
 503
 504         os_free(wpa_auth->wpa_ie);
 505
 506         group = wpa_auth->group;
 507         while (group) {
 508                 prev = group;
 509                 group = group->next;
 510                 os_free(prev);
 511         }
 512
 513         os_free(wpa_auth);
 514 }
 515
 516
 517 /**
 518  * wpa_reconfig - Update WPA authenticator configuration
 519  * @wpa_auth: Pointer to WPA authenticator data from wpa_init()
 520  * @conf: Configuration for WPA authenticator
 521  */
 522 int wpa_reconfig(struct wpa_authenticator *wpa_auth,
 523                  struct wpa_auth_config *conf)
 524 {
 525         struct wpa_group *group;
 526         if (wpa_auth == NULL)
 527                 return 0;
 528
 529         os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
 530         if (wpa_auth_gen_wpa_ie(wpa_auth)) {
 531                 wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
 532                 return -1;
 533         }
 534
 535         /*
 536          * Reinitialize GTK to make sure it is suitable for the new
 537          * configuration.
 538          */
 539         group = wpa_auth->group;
 540         group->GTK_len = wpa_cipher_key_len(wpa_auth->conf.wpa_group);
 541         group->GInit = TRUE;
 542         wpa_group_sm_step(wpa_auth, group);
 543         group->GInit = FALSE;
 544         wpa_group_sm_step(wpa_auth, group);
 545
 546         return 0;
 547 }
 548
 549
 550 struct wpa_state_machine *
 551 wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
 552                   const u8 *p2p_dev_addr)
 553 {
 554         struct wpa_state_machine *sm;
 555
 556         if (wpa_auth->group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
 557                 return NULL;
 558
 559         sm = os_zalloc(sizeof(struct wpa_state_machine));
 560         if (sm == NULL)
 561                 return NULL;
 562         os_memcpy(sm->addr, addr, ETH_ALEN);
 563         if (p2p_dev_addr)
 564                 os_memcpy(sm->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
 565
 566         sm->wpa_auth = wpa_auth;
 567         sm->group = wpa_auth->group;
 568
 569         return sm;
 570 }
 571
 572
 573 int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
 574                             struct wpa_state_machine *sm)
 575 {
 576         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 577                 return -1;
 578
 579 #ifdef CONFIG_IEEE80211R
 580         if (sm->ft_completed) {
 581                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 582                                 "FT authentication already completed - do not "
 583                                 "start 4-way handshake");
 584                 /* Go to PTKINITDONE state to allow GTK rekeying */
 585                 sm->wpa_ptk_state = WPA_PTK_PTKINITDONE;
 586                 return 0;
 587         }
 588 #endif /* CONFIG_IEEE80211R */
 589
 590         if (sm->started) {
 591                 os_memset(&sm->key_replay, 0, sizeof(sm->key_replay));
 592                 sm->ReAuthenticationRequest = TRUE;
 593                 return wpa_sm_step(sm);
 594         }
 595
 596         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
 597                         "start authentication");
 598         sm->started = 1;
 599
 600         sm->Init = TRUE;
 601         if (wpa_sm_step(sm) == 1)
 602                 return 1; /* should not really happen */
 603         sm->Init = FALSE;
 604         sm->AuthenticationRequest = TRUE;
 605         return wpa_sm_step(sm);
 606 }
 607
 608
 609 void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm)
 610 {
 611         /* WPA/RSN was not used - clear WPA state. This is needed if the STA
 612          * reassociates back to the same AP while the previous entry for the
 613          * STA has not yet been removed. */
 614         if (sm == NULL)
 615                 return;
 616
 617         sm->wpa_key_mgmt = 0;
 618 }
 619
 620
 621 static void wpa_free_sta_sm(struct wpa_state_machine *sm)
 622 {
 623 #ifdef CONFIG_P2P
 624         if (WPA_GET_BE32(sm->ip_addr)) {
 625                 u32 start;
 626                 wpa_printf(MSG_DEBUG, "P2P: Free assigned IP "
 627                            "address %u.%u.%u.%u from " MACSTR,
 628                            sm->ip_addr[0], sm->ip_addr[1],
 629                            sm->ip_addr[2], sm->ip_addr[3],
 630                            MAC2STR(sm->addr));
 631                 start = WPA_GET_BE32(sm->wpa_auth->conf.ip_addr_start);
 632                 bitfield_clear(sm->wpa_auth->ip_pool,
 633                                WPA_GET_BE32(sm->ip_addr) - start);
 634         }
 635 #endif /* CONFIG_P2P */
 636         if (sm->GUpdateStationKeys) {
 637                 sm->group->GKeyDoneStations--;
 638                 sm->GUpdateStationKeys = FALSE;
 639         }
 640 #ifdef CONFIG_IEEE80211R
 641         os_free(sm->assoc_resp_ftie);
 642         wpabuf_free(sm->ft_pending_req_ies);
 643 #endif /* CONFIG_IEEE80211R */
 644         os_free(sm->last_rx_eapol_key);
 645         os_free(sm->wpa_ie);
 646         os_free(sm);
 647 }
 648
 649
 650 void wpa_auth_sta_deinit(struct wpa_state_machine *sm)
 651 {
 652         if (sm == NULL)
 653                 return;
 654
 655         if (sm->wpa_auth->conf.wpa_strict_rekey && sm->has_GTK) {
 656                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
 657                                 "strict rekeying - force GTK rekey since STA "
 658                                 "is leaving");
 659                 eloop_cancel_timeout(wpa_rekey_gtk, sm->wpa_auth, NULL);
 660                 eloop_register_timeout(0, 500000, wpa_rekey_gtk, sm->wpa_auth,
 661                                        NULL);
 662         }
 663
 664         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
 665         sm->pending_1_of_4_timeout = 0;
 666         eloop_cancel_timeout(wpa_sm_call_step, sm, NULL);
 667         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
 668         if (sm->in_step_loop) {
 669                 /* Must not free state machine while wpa_sm_step() is running.
 670                  * Freeing will be completed in the end of wpa_sm_step(). */
 671                 wpa_printf(MSG_DEBUG, "WPA: Registering pending STA state "
 672                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
 673                 sm->pending_deinit = 1;
 674         } else
 675                 wpa_free_sta_sm(sm);
 676 }
 677
 678
 679 static void wpa_request_new_ptk(struct wpa_state_machine *sm)
 680 {
 681         if (sm == NULL)
 682                 return;
 683
 684         sm->PTKRequest = TRUE;
 685         sm->PTK_valid = 0;
 686 }
 687
 688
 689 static int wpa_replay_counter_valid(struct wpa_key_replay_counter *ctr,
 690                                     const u8 *replay_counter)
 691 {
 692         int i;
 693         for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
 694                 if (!ctr[i].valid)
 695                         break;
 696                 if (os_memcmp(replay_counter, ctr[i].counter,
 697                               WPA_REPLAY_COUNTER_LEN) == 0)
 698                         return 1;
 699         }
 700         return 0;
 701 }
 702
 703
 704 static void wpa_replay_counter_mark_invalid(struct wpa_key_replay_counter *ctr,
 705                                             const u8 *replay_counter)
 706 {
 707         int i;
 708         for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
 709                 if (ctr[i].valid &&
 710                     (replay_counter == NULL ||
 711                      os_memcmp(replay_counter, ctr[i].counter,
 712                                WPA_REPLAY_COUNTER_LEN) == 0))
 713                         ctr[i].valid = FALSE;
 714         }
 715 }
 716
 717
 718 #ifdef CONFIG_IEEE80211R
 719 static int ft_check_msg_2_of_4(struct wpa_authenticator *wpa_auth,
 720                                struct wpa_state_machine *sm,
 721                                struct wpa_eapol_ie_parse *kde)
 722 {
 723         struct wpa_ie_data ie;
 724         struct rsn_mdie *mdie;
 725
 726         if (wpa_parse_wpa_ie_rsn(kde->rsn_ie, kde->rsn_ie_len, &ie) < 0 ||
 727             ie.num_pmkid != 1 || ie.pmkid == NULL) {
 728                 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
 729                            "FT 4-way handshake message 2/4");
 730                 return -1;
 731         }
 732
 733         os_memcpy(sm->sup_pmk_r1_name, ie.pmkid, PMKID_LEN);
 734         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Supplicant",
 735                     sm->sup_pmk_r1_name, PMKID_LEN);
 736
 737         if (!kde->mdie || !kde->ftie) {
 738                 wpa_printf(MSG_DEBUG, "FT: No %s in FT 4-way handshake "
 739                            "message 2/4", kde->mdie ? "FTIE" : "MDIE");
 740                 return -1;
 741         }
 742
 743         mdie = (struct rsn_mdie *) (kde->mdie + 2);
 744         if (kde->mdie[1] < sizeof(struct rsn_mdie) ||
 745             os_memcmp(wpa_auth->conf.mobility_domain, mdie->mobility_domain,
 746                       MOBILITY_DOMAIN_ID_LEN) != 0) {
 747                 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
 748                 return -1;
 749         }
 750
 751         if (sm->assoc_resp_ftie &&
 752             (kde->ftie[1] != sm->assoc_resp_ftie[1] ||
 753              os_memcmp(kde->ftie, sm->assoc_resp_ftie,
 754                        2 + sm->assoc_resp_ftie[1]) != 0)) {
 755                 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
 756                 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 2/4",
 757                             kde->ftie, kde->ftie_len);
 758                 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)AssocResp",
 759                             sm->assoc_resp_ftie, 2 + sm->assoc_resp_ftie[1]);
 760                 return -1;
 761         }
 762
 763         return 0;
 764 }
 765 #endif /* CONFIG_IEEE80211R */
 766
 767
 768 static int wpa_receive_error_report(struct wpa_authenticator *wpa_auth,
 769                                     struct wpa_state_machine *sm, int group)
 770 {
 771         /* Supplicant reported a Michael MIC error */
 772         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
 773                          "received EAPOL-Key Error Request "
 774                          "(STA detected Michael MIC failure (group=%d))",
 775                          group);
 776
 777         if (group && wpa_auth->conf.wpa_group != WPA_CIPHER_TKIP) {
 778                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 779                                 "ignore Michael MIC failure report since "
 780                                 "group cipher is not TKIP");
 781         } else if (!group && sm->pairwise != WPA_CIPHER_TKIP) {
 782                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
 783                                 "ignore Michael MIC failure report since "
 784                                 "pairwise cipher is not TKIP");
 785         } else {
 786                 if (wpa_auth_mic_failure_report(wpa_auth, sm->addr) > 0)
 787                         return 1; /* STA entry was removed */
 788                 sm->dot11RSNAStatsTKIPRemoteMICFailures++;
 789                 wpa_auth->dot11RSNAStatsTKIPRemoteMICFailures++;
 790         }
 791
 792         /*
 793          * Error report is not a request for a new key handshake, but since
 794          * Authenticator may do it, let's change the keys now anyway.
 795          */
 796         wpa_request_new_ptk(sm);
 797         return 0;
 798 }
 799
 800
 801 static int wpa_try_alt_snonce(struct wpa_state_machine *sm, u8 *data,
 802                               size_t data_len)
 803 {
 804         struct wpa_ptk PTK;
 805         int ok = 0;
 806         const u8 *pmk = NULL;
 807
 808         for (;;) {
 809                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
 810                         pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
 811                                                sm->p2p_dev_addr, pmk);
 812                         if (pmk == NULL)
 813                                 break;
 814                 } else
 815                         pmk = sm->PMK;
 816
 817                 wpa_derive_ptk(sm, sm->alt_SNonce, pmk, &PTK);
 818
 819                 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK, data, data_len)
 820                     == 0) {
 821                         ok = 1;
 822                         break;
 823                 }
 824
 825                 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
 826                         break;
 827         }
 828
 829         if (!ok) {
 830                 wpa_printf(MSG_DEBUG,
 831                            "WPA: Earlier SNonce did not result in matching MIC");
 832                 return -1;
 833         }
 834
 835         wpa_printf(MSG_DEBUG,
 836                    "WPA: Earlier SNonce resulted in matching MIC");
 837         sm->alt_snonce_valid = 0;
 838         os_memcpy(sm->SNonce, sm->alt_SNonce, WPA_NONCE_LEN);
 839         os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
 840         sm->PTK_valid = TRUE;
 841
 842         return 0;
 843 }
 844
 845
 846 void wpa_receive(struct wpa_authenticator *wpa_auth,
 847                  struct wpa_state_machine *sm,
 848                  u8 *data, size_t data_len)
 849 {
 850         struct ieee802_1x_hdr *hdr;
 851         struct wpa_eapol_key *key;
 852         struct wpa_eapol_key_192 *key192;
 853         u16 key_info, key_data_length;
 854         enum { PAIRWISE_2, PAIRWISE_4, GROUP_2, REQUEST,
 855                SMK_M1, SMK_M3, SMK_ERROR } msg;
 856         char *msgtxt;
 857         struct wpa_eapol_ie_parse kde;
 858         int ft;
 859         const u8 *eapol_key_ie, *key_data;
 860         size_t eapol_key_ie_len, keyhdrlen, mic_len;
 861
 862         if (wpa_auth == NULL || !wpa_auth->conf.wpa || sm == NULL)
 863                 return;
 864
 865         mic_len = wpa_mic_len(sm->wpa_key_mgmt);
 866         keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
 867
 868         if (data_len < sizeof(*hdr) + keyhdrlen)
 869                 return;
 870
 871         hdr = (struct ieee802_1x_hdr *) data;
 872         key = (struct wpa_eapol_key *) (hdr + 1);
 873         key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
 874         key_info = WPA_GET_BE16(key->key_info);
 875         if (mic_len == 24) {
 876                 key_data = (const u8 *) (key192 + 1);
 877                 key_data_length = WPA_GET_BE16(key192->key_data_length);
 878         } else {
 879                 key_data = (const u8 *) (key + 1);
 880                 key_data_length = WPA_GET_BE16(key->key_data_length);
 881         }
 882         wpa_printf(MSG_DEBUG, "WPA: Received EAPOL-Key from " MACSTR
 883                    " key_info=0x%x type=%u key_data_length=%u",
 884                    MAC2STR(sm->addr), key_info, key->type, key_data_length);
 885         if (key_data_length > data_len - sizeof(*hdr) - keyhdrlen) {
 886                 wpa_printf(MSG_INFO, "WPA: Invalid EAPOL-Key frame - "
 887                            "key_data overflow (%d > %lu)",
 888                            key_data_length,
 889                            (unsigned long) (data_len - sizeof(*hdr) -
 890                                             keyhdrlen));
 891                 return;
 892         }
 893
 894         if (sm->wpa == WPA_VERSION_WPA2) {
 895                 if (key->type == EAPOL_KEY_TYPE_WPA) {
 896                         /*
 897                          * Some deployed station implementations seem to send
 898                          * msg 4/4 with incorrect type value in WPA2 mode.
 899                          */
 900                         wpa_printf(MSG_DEBUG, "Workaround: Allow EAPOL-Key "
 901                                    "with unexpected WPA type in RSN mode");
 902                 } else if (key->type != EAPOL_KEY_TYPE_RSN) {
 903                         wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
 904                                    "unexpected type %d in RSN mode",
 905                                    key->type);
 906                         return;
 907                 }
 908         } else {
 909                 if (key->type != EAPOL_KEY_TYPE_WPA) {
 910                         wpa_printf(MSG_DEBUG, "Ignore EAPOL-Key with "
 911                                    "unexpected type %d in WPA mode",
 912                                    key->type);
 913                         return;
 914                 }
 915         }
 916
 917         wpa_hexdump(MSG_DEBUG, "WPA: Received Key Nonce", key->key_nonce,
 918                     WPA_NONCE_LEN);
 919         wpa_hexdump(MSG_DEBUG, "WPA: Received Replay Counter",
 920                     key->replay_counter, WPA_REPLAY_COUNTER_LEN);
 921
 922         /* FIX: verify that the EAPOL-Key frame was encrypted if pairwise keys
 923          * are set */
 924
 925         if ((key_info & (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) ==
 926             (WPA_KEY_INFO_SMK_MESSAGE | WPA_KEY_INFO_REQUEST)) {
 927                 if (key_info & WPA_KEY_INFO_ERROR) {
 928                         msg = SMK_ERROR;
 929                         msgtxt = "SMK Error";
 930                 } else {
 931                         msg = SMK_M1;
 932                         msgtxt = "SMK M1";
 933                 }
 934         } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
 935                 msg = SMK_M3;
 936                 msgtxt = "SMK M3";
 937         } else if (key_info & WPA_KEY_INFO_REQUEST) {
 938                 msg = REQUEST;
 939                 msgtxt = "Request";
 940         } else if (!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
 941                 msg = GROUP_2;
 942                 msgtxt = "2/2 Group";
 943         } else if (key_data_length == 0) {
 944                 msg = PAIRWISE_4;
 945                 msgtxt = "4/4 Pairwise";
 946         } else {
 947                 msg = PAIRWISE_2;
 948                 msgtxt = "2/4 Pairwise";
 949         }
 950
 951         /* TODO: key_info type validation for PeerKey */
 952         if (msg == REQUEST || msg == PAIRWISE_2 || msg == PAIRWISE_4 ||
 953             msg == GROUP_2) {
 954                 u16 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
 955                 if (sm->pairwise == WPA_CIPHER_CCMP ||
 956                     sm->pairwise == WPA_CIPHER_GCMP) {
 957                         if (wpa_use_aes_cmac(sm) &&
 958                             sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN &&
 959                             !wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
 960                             ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
 961                                 wpa_auth_logger(wpa_auth, sm->addr,
 962                                                 LOGGER_WARNING,
 963                                                 "advertised support for "
 964                                                 "AES-128-CMAC, but did not "
 965                                                 "use it");
 966                                 return;
 967                         }
 968
 969                         if (!wpa_use_aes_cmac(sm) &&
 970                             ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
 971                                 wpa_auth_logger(wpa_auth, sm->addr,
 972                                                 LOGGER_WARNING,
 973                                                 "did not use HMAC-SHA1-AES "
 974                                                 "with CCMP/GCMP");
 975                                 return;
 976                         }
 977                 }
 978
 979                 if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) &&
 980                     ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
 981                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
 982                                         "did not use EAPOL-Key descriptor version 0 as required for AKM-defined cases");
 983                         return;
 984                 }
 985         }
 986
 987         if (key_info & WPA_KEY_INFO_REQUEST) {
 988                 if (sm->req_replay_counter_used &&
 989                     os_memcmp(key->replay_counter, sm->req_replay_counter,
 990                               WPA_REPLAY_COUNTER_LEN) <= 0) {
 991                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_WARNING,
 992                                         "received EAPOL-Key request with "
 993                                         "replayed counter");
 994                         return;
 995                 }
 996         }
 997
 998         if (!(key_info & WPA_KEY_INFO_REQUEST) &&
 999             !wpa_replay_counter_valid(sm->key_replay, key->replay_counter)) {
1000                 int i;
1001
1002                 if (msg == PAIRWISE_2 &&
1003                     wpa_replay_counter_valid(sm->prev_key_replay,
1004                                              key->replay_counter) &&
1005                     sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1006                     os_memcmp(sm->SNonce, key->key_nonce, WPA_NONCE_LEN) != 0)
1007                 {
1008                         /*
1009                          * Some supplicant implementations (e.g., Windows XP
1010                          * WZC) update SNonce for each EAPOL-Key 2/4. This
1011                          * breaks the workaround on accepting any of the
1012                          * pending requests, so allow the SNonce to be updated
1013                          * even if we have already sent out EAPOL-Key 3/4.
1014                          */
1015                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1016                                          "Process SNonce update from STA "
1017                                          "based on retransmitted EAPOL-Key "
1018                                          "1/4");
1019                         sm->update_snonce = 1;
1020                         os_memcpy(sm->alt_SNonce, sm->SNonce, WPA_NONCE_LEN);
1021                         sm->alt_snonce_valid = TRUE;
1022                         os_memcpy(sm->alt_replay_counter,
1023                                   sm->key_replay[0].counter,
1024                                   WPA_REPLAY_COUNTER_LEN);
1025                         goto continue_processing;
1026                 }
1027
1028                 if (msg == PAIRWISE_4 && sm->alt_snonce_valid &&
1029                     sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING &&
1030                     os_memcmp(key->replay_counter, sm->alt_replay_counter,
1031                               WPA_REPLAY_COUNTER_LEN) == 0) {
1032                         /*
1033                          * Supplicant may still be using the old SNonce since
1034                          * there was two EAPOL-Key 2/4 messages and they had
1035                          * different SNonce values.
1036                          */
1037                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1038                                          "Try to process received EAPOL-Key 4/4 based on old Replay Counter and SNonce from an earlier EAPOL-Key 1/4");
1039                         goto continue_processing;
1040                 }
1041
1042                 if (msg == PAIRWISE_2 &&
1043                     wpa_replay_counter_valid(sm->prev_key_replay,
1044                                              key->replay_counter) &&
1045                     sm->wpa_ptk_state == WPA_PTK_PTKINITNEGOTIATING) {
1046                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1047                                          "ignore retransmitted EAPOL-Key %s - "
1048                                          "SNonce did not change", msgtxt);
1049                 } else {
1050                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1051                                          "received EAPOL-Key %s with "
1052                                          "unexpected replay counter", msgtxt);
1053                 }
1054                 for (i = 0; i < RSNA_MAX_EAPOL_RETRIES; i++) {
1055                         if (!sm->key_replay[i].valid)
1056                                 break;
1057                         wpa_hexdump(MSG_DEBUG, "pending replay counter",
1058                                     sm->key_replay[i].counter,
1059                                     WPA_REPLAY_COUNTER_LEN);
1060                 }
1061                 wpa_hexdump(MSG_DEBUG, "received replay counter",
1062                             key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1063                 return;
1064         }
1065
1066 continue_processing:
1067         switch (msg) {
1068         case PAIRWISE_2:
1069                 if (sm->wpa_ptk_state != WPA_PTK_PTKSTART &&
1070                     sm->wpa_ptk_state != WPA_PTK_PTKCALCNEGOTIATING &&
1071                     (!sm->update_snonce ||
1072                      sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING)) {
1073                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1074                                          "received EAPOL-Key msg 2/4 in "
1075                                          "invalid state (%d) - dropped",
1076                                          sm->wpa_ptk_state);
1077                         return;
1078                 }
1079                 random_add_randomness(key->key_nonce, WPA_NONCE_LEN);
1080                 if (sm->group->reject_4way_hs_for_entropy) {
1081                         /*
1082                          * The system did not have enough entropy to generate
1083                          * strong random numbers. Reject the first 4-way
1084                          * handshake(s) and collect some entropy based on the
1085                          * information from it. Once enough entropy is
1086                          * available, the next atempt will trigger GMK/Key
1087                          * Counter update and the station will be allowed to
1088                          * continue.
1089                          */
1090                         wpa_printf(MSG_DEBUG, "WPA: Reject 4-way handshake to "
1091                                    "collect more entropy for random number "
1092                                    "generation");
1093                         random_mark_pool_ready();
1094                         wpa_sta_disconnect(wpa_auth, sm->addr);
1095                         return;
1096                 }
1097                 if (wpa_parse_kde_ies(key_data, key_data_length, &kde) < 0) {
1098                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1099                                          "received EAPOL-Key msg 2/4 with "
1100                                          "invalid Key Data contents");
1101                         return;
1102                 }
1103                 if (kde.rsn_ie) {
1104                         eapol_key_ie = kde.rsn_ie;
1105                         eapol_key_ie_len = kde.rsn_ie_len;
1106                 } else if (kde.osen) {
1107                         eapol_key_ie = kde.osen;
1108                         eapol_key_ie_len = kde.osen_len;
1109                 } else {
1110                         eapol_key_ie = kde.wpa_ie;
1111                         eapol_key_ie_len = kde.wpa_ie_len;
1112                 }
1113                 ft = sm->wpa == WPA_VERSION_WPA2 &&
1114                         wpa_key_mgmt_ft(sm->wpa_key_mgmt);
1115                 if (sm->wpa_ie == NULL ||
1116                     wpa_compare_rsn_ie(ft,
1117                                        sm->wpa_ie, sm->wpa_ie_len,
1118                                        eapol_key_ie, eapol_key_ie_len)) {
1119                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1120                                         "WPA IE from (Re)AssocReq did not "
1121                                         "match with msg 2/4");
1122                         if (sm->wpa_ie) {
1123                                 wpa_hexdump(MSG_DEBUG, "WPA IE in AssocReq",
1124                                             sm->wpa_ie, sm->wpa_ie_len);
1125                         }
1126                         wpa_hexdump(MSG_DEBUG, "WPA IE in msg 2/4",
1127                                     eapol_key_ie, eapol_key_ie_len);
1128                         /* MLME-DEAUTHENTICATE.request */
1129                         wpa_sta_disconnect(wpa_auth, sm->addr);
1130                         return;
1131                 }
1132 #ifdef CONFIG_IEEE80211R
1133                 if (ft && ft_check_msg_2_of_4(wpa_auth, sm, &kde) < 0) {
1134                         wpa_sta_disconnect(wpa_auth, sm->addr);
1135                         return;
1136                 }
1137 #endif /* CONFIG_IEEE80211R */
1138 #ifdef CONFIG_P2P
1139                 if (kde.ip_addr_req && kde.ip_addr_req[0] &&
1140                     wpa_auth->ip_pool && WPA_GET_BE32(sm->ip_addr) == 0) {
1141                         int idx;
1142                         wpa_printf(MSG_DEBUG, "P2P: IP address requested in "
1143                                    "EAPOL-Key exchange");
1144                         idx = bitfield_get_first_zero(wpa_auth->ip_pool);
1145                         if (idx >= 0) {
1146                                 u32 start = WPA_GET_BE32(wpa_auth->conf.
1147                                                          ip_addr_start);
1148                                 bitfield_set(wpa_auth->ip_pool, idx);
1149                                 WPA_PUT_BE32(sm->ip_addr, start + idx);
1150                                 wpa_printf(MSG_DEBUG, "P2P: Assigned IP "
1151                                            "address %u.%u.%u.%u to " MACSTR,
1152                                            sm->ip_addr[0], sm->ip_addr[1],
1153                                            sm->ip_addr[2], sm->ip_addr[3],
1154                                            MAC2STR(sm->addr));
1155                         }
1156                 }
1157 #endif /* CONFIG_P2P */
1158                 break;
1159         case PAIRWISE_4:
1160                 if (sm->wpa_ptk_state != WPA_PTK_PTKINITNEGOTIATING ||
1161                     !sm->PTK_valid) {
1162                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1163                                          "received EAPOL-Key msg 4/4 in "
1164                                          "invalid state (%d) - dropped",
1165                                          sm->wpa_ptk_state);
1166                         return;
1167                 }
1168                 break;
1169         case GROUP_2:
1170                 if (sm->wpa_ptk_group_state != WPA_PTK_GROUP_REKEYNEGOTIATING
1171                     || !sm->PTK_valid) {
1172                         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_INFO,
1173                                          "received EAPOL-Key msg 2/2 in "
1174                                          "invalid state (%d) - dropped",
1175                                          sm->wpa_ptk_group_state);
1176                         return;
1177                 }
1178                 break;
1179 #ifdef CONFIG_PEERKEY
1180         case SMK_M1:
1181         case SMK_M3:
1182         case SMK_ERROR:
1183                 if (!wpa_auth->conf.peerkey) {
1184                         wpa_printf(MSG_DEBUG, "RSN: SMK M1/M3/Error, but "
1185                                    "PeerKey use disabled - ignoring message");
1186                         return;
1187                 }
1188                 if (!sm->PTK_valid) {
1189                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1190                                         "received EAPOL-Key msg SMK in "
1191                                         "invalid state - dropped");
1192                         return;
1193                 }
1194                 break;
1195 #else /* CONFIG_PEERKEY */
1196         case SMK_M1:
1197         case SMK_M3:
1198         case SMK_ERROR:
1199                 return; /* STSL disabled - ignore SMK messages */
1200 #endif /* CONFIG_PEERKEY */
1201         case REQUEST:
1202                 break;
1203         }
1204
1205         wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
1206                          "received EAPOL-Key frame (%s)", msgtxt);
1207
1208         if (key_info & WPA_KEY_INFO_ACK) {
1209                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1210                                 "received invalid EAPOL-Key: Key Ack set");
1211                 return;
1212         }
1213
1214         if (!(key_info & WPA_KEY_INFO_MIC)) {
1215                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1216                                 "received invalid EAPOL-Key: Key MIC not set");
1217                 return;
1218         }
1219
1220         sm->MICVerified = FALSE;
1221         if (sm->PTK_valid && !sm->update_snonce) {
1222                 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &sm->PTK, data,
1223                                        data_len) &&
1224                     (msg != PAIRWISE_4 || !sm->alt_snonce_valid ||
1225                      wpa_try_alt_snonce(sm, data, data_len))) {
1226                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1227                                         "received EAPOL-Key with invalid MIC");
1228                         return;
1229                 }
1230                 sm->MICVerified = TRUE;
1231                 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
1232                 sm->pending_1_of_4_timeout = 0;
1233         }
1234
1235         if (key_info & WPA_KEY_INFO_REQUEST) {
1236                 if (sm->MICVerified) {
1237                         sm->req_replay_counter_used = 1;
1238                         os_memcpy(sm->req_replay_counter, key->replay_counter,
1239                                   WPA_REPLAY_COUNTER_LEN);
1240                 } else {
1241                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1242                                         "received EAPOL-Key request with "
1243                                         "invalid MIC");
1244                         return;
1245                 }
1246
1247                 /*
1248                  * TODO: should decrypt key data field if encryption was used;
1249                  * even though MAC address KDE is not normally encrypted,
1250                  * supplicant is allowed to encrypt it.
1251                  */
1252                 if (msg == SMK_ERROR) {
1253 #ifdef CONFIG_PEERKEY
1254                         wpa_smk_error(wpa_auth, sm, key_data, key_data_length);
1255 #endif /* CONFIG_PEERKEY */
1256                         return;
1257                 } else if (key_info & WPA_KEY_INFO_ERROR) {
1258                         if (wpa_receive_error_report(
1259                                     wpa_auth, sm,
1260                                     !(key_info & WPA_KEY_INFO_KEY_TYPE)) > 0)
1261                                 return; /* STA entry was removed */
1262                 } else if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1263                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1264                                         "received EAPOL-Key Request for new "
1265                                         "4-Way Handshake");
1266                         wpa_request_new_ptk(sm);
1267 #ifdef CONFIG_PEERKEY
1268                 } else if (msg == SMK_M1) {
1269                         wpa_smk_m1(wpa_auth, sm, key, key_data,
1270                                    key_data_length);
1271 #endif /* CONFIG_PEERKEY */
1272                 } else if (key_data_length > 0 &&
1273                            wpa_parse_kde_ies(key_data, key_data_length,
1274                                              &kde) == 0 &&
1275                            kde.mac_addr) {
1276                 } else {
1277                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1278                                         "received EAPOL-Key Request for GTK "
1279                                         "rekeying");
1280                         eloop_cancel_timeout(wpa_rekey_gtk, wpa_auth, NULL);
1281                         wpa_rekey_gtk(wpa_auth, NULL);
1282                 }
1283         } else {
1284                 /* Do not allow the same key replay counter to be reused. */
1285                 wpa_replay_counter_mark_invalid(sm->key_replay,
1286                                                 key->replay_counter);
1287
1288                 if (msg == PAIRWISE_2) {
1289                         /*
1290                          * Maintain a copy of the pending EAPOL-Key frames in
1291                          * case the EAPOL-Key frame was retransmitted. This is
1292                          * needed to allow EAPOL-Key msg 2/4 reply to another
1293                          * pending msg 1/4 to update the SNonce to work around
1294                          * unexpected supplicant behavior.
1295                          */
1296                         os_memcpy(sm->prev_key_replay, sm->key_replay,
1297                                   sizeof(sm->key_replay));
1298                 } else {
1299                         os_memset(sm->prev_key_replay, 0,
1300                                   sizeof(sm->prev_key_replay));
1301                 }
1302
1303                 /*
1304                  * Make sure old valid counters are not accepted anymore and
1305                  * do not get copied again.
1306                  */
1307                 wpa_replay_counter_mark_invalid(sm->key_replay, NULL);
1308         }
1309
1310 #ifdef CONFIG_PEERKEY
1311         if (msg == SMK_M3) {
1312                 wpa_smk_m3(wpa_auth, sm, key, key_data, key_data_length);
1313                 return;
1314         }
1315 #endif /* CONFIG_PEERKEY */
1316
1317         os_free(sm->last_rx_eapol_key);
1318         sm->last_rx_eapol_key = os_malloc(data_len);
1319         if (sm->last_rx_eapol_key == NULL)
1320                 return;
1321         os_memcpy(sm->last_rx_eapol_key, data, data_len);
1322         sm->last_rx_eapol_key_len = data_len;
1323
1324         sm->rx_eapol_key_secure = !!(key_info & WPA_KEY_INFO_SECURE);
1325         sm->EAPOLKeyReceived = TRUE;
1326         sm->EAPOLKeyPairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1327         sm->EAPOLKeyRequest = !!(key_info & WPA_KEY_INFO_REQUEST);
1328         os_memcpy(sm->SNonce, key->key_nonce, WPA_NONCE_LEN);
1329         wpa_sm_step(sm);
1330 }
1331
1332
1333 static int wpa_gmk_to_gtk(const u8 *gmk, const char *label, const u8 *addr,
1334                           const u8 *gnonce, u8 *gtk, size_t gtk_len)
1335 {
1336         u8 data[ETH_ALEN + WPA_NONCE_LEN + 8 + 16];
1337         u8 *pos;
1338         int ret = 0;
1339
1340         /* GTK = PRF-X(GMK, "Group key expansion",
1341          *      AA || GNonce || Time || random data)
1342          * The example described in the IEEE 802.11 standard uses only AA and
1343          * GNonce as inputs here. Add some more entropy since this derivation
1344          * is done only at the Authenticator and as such, does not need to be
1345          * exactly same.
1346          */
1347         os_memcpy(data, addr, ETH_ALEN);
1348         os_memcpy(data + ETH_ALEN, gnonce, WPA_NONCE_LEN);
1349         pos = data + ETH_ALEN + WPA_NONCE_LEN;
1350         wpa_get_ntp_timestamp(pos);
1351         pos += 8;
1352         if (random_get_bytes(pos, 16) < 0)
1353                 ret = -1;
1354
1355 #ifdef CONFIG_IEEE80211W
1356         sha256_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len);
1357 #else /* CONFIG_IEEE80211W */
1358         if (sha1_prf(gmk, WPA_GMK_LEN, label, data, sizeof(data), gtk, gtk_len)
1359             < 0)
1360                 ret = -1;
1361 #endif /* CONFIG_IEEE80211W */
1362
1363         return ret;
1364 }
1365
1366
1367 static void wpa_send_eapol_timeout(void *eloop_ctx, void *timeout_ctx)
1368 {
1369         struct wpa_authenticator *wpa_auth = eloop_ctx;
1370         struct wpa_state_machine *sm = timeout_ctx;
1371
1372         sm->pending_1_of_4_timeout = 0;
1373         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG, "EAPOL-Key timeout");
1374         sm->TimeoutEvt = TRUE;
1375         wpa_sm_step(sm);
1376 }
1377
1378
1379 void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1380                       struct wpa_state_machine *sm, int key_info,
1381                       const u8 *key_rsc, const u8 *nonce,
1382                       const u8 *kde, size_t kde_len,
1383                       int keyidx, int encr, int force_version)
1384 {
1385         struct ieee802_1x_hdr *hdr;
1386         struct wpa_eapol_key *key;
1387         struct wpa_eapol_key_192 *key192;
1388         size_t len, mic_len, keyhdrlen;
1389         int alg;
1390         int key_data_len, pad_len = 0;
1391         u8 *buf, *pos;
1392         int version, pairwise;
1393         int i;
1394         u8 *key_data;
1395
1396         mic_len = wpa_mic_len(sm->wpa_key_mgmt);
1397         keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
1398
1399         len = sizeof(struct ieee802_1x_hdr) + keyhdrlen;
1400
1401         if (force_version)
1402                 version = force_version;
1403         else if (sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1404                  wpa_key_mgmt_suite_b(sm->wpa_key_mgmt))
1405                 version = WPA_KEY_INFO_TYPE_AKM_DEFINED;
1406         else if (wpa_use_aes_cmac(sm))
1407                 version = WPA_KEY_INFO_TYPE_AES_128_CMAC;
1408         else if (sm->pairwise != WPA_CIPHER_TKIP)
1409                 version = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
1410         else
1411                 version = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
1412
1413         pairwise = !!(key_info & WPA_KEY_INFO_KEY_TYPE);
1414
1415         wpa_printf(MSG_DEBUG, "WPA: Send EAPOL(version=%d secure=%d mic=%d "
1416                    "ack=%d install=%d pairwise=%d kde_len=%lu keyidx=%d "
1417                    "encr=%d)",
1418                    version,
1419                    (key_info & WPA_KEY_INFO_SECURE) ? 1 : 0,
1420                    (key_info & WPA_KEY_INFO_MIC) ? 1 : 0,
1421                    (key_info & WPA_KEY_INFO_ACK) ? 1 : 0,
1422                    (key_info & WPA_KEY_INFO_INSTALL) ? 1 : 0,
1423                    pairwise, (unsigned long) kde_len, keyidx, encr);
1424
1425         key_data_len = kde_len;
1426
1427         if ((version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1428              sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1429              wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1430              version == WPA_KEY_INFO_TYPE_AES_128_CMAC) && encr) {
1431                 pad_len = key_data_len % 8;
1432                 if (pad_len)
1433                         pad_len = 8 - pad_len;
1434                 key_data_len += pad_len + 8;
1435         }
1436
1437         len += key_data_len;
1438
1439         hdr = os_zalloc(len);
1440         if (hdr == NULL)
1441                 return;
1442         hdr->version = wpa_auth->conf.eapol_version;
1443         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
1444         hdr->length = host_to_be16(len  - sizeof(*hdr));
1445         key = (struct wpa_eapol_key *) (hdr + 1);
1446         key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
1447         key_data = ((u8 *) (hdr + 1)) + keyhdrlen;
1448
1449         key->type = sm->wpa == WPA_VERSION_WPA2 ?
1450                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1451         key_info |= version;
1452         if (encr && sm->wpa == WPA_VERSION_WPA2)
1453                 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA;
1454         if (sm->wpa != WPA_VERSION_WPA2)
1455                 key_info |= keyidx << WPA_KEY_INFO_KEY_INDEX_SHIFT;
1456         WPA_PUT_BE16(key->key_info, key_info);
1457
1458         alg = pairwise ? sm->pairwise : wpa_auth->conf.wpa_group;
1459         WPA_PUT_BE16(key->key_length, wpa_cipher_key_len(alg));
1460         if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
1461                 WPA_PUT_BE16(key->key_length, 0);
1462
1463         /* FIX: STSL: what to use as key_replay_counter? */
1464         for (i = RSNA_MAX_EAPOL_RETRIES - 1; i > 0; i--) {
1465                 sm->key_replay[i].valid = sm->key_replay[i - 1].valid;
1466                 os_memcpy(sm->key_replay[i].counter,
1467                           sm->key_replay[i - 1].counter,
1468                           WPA_REPLAY_COUNTER_LEN);
1469         }
1470         inc_byte_array(sm->key_replay[0].counter, WPA_REPLAY_COUNTER_LEN);
1471         os_memcpy(key->replay_counter, sm->key_replay[0].counter,
1472                   WPA_REPLAY_COUNTER_LEN);
1473         wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter",
1474                     key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1475         sm->key_replay[0].valid = TRUE;
1476
1477         if (nonce)
1478                 os_memcpy(key->key_nonce, nonce, WPA_NONCE_LEN);
1479
1480         if (key_rsc)
1481                 os_memcpy(key->key_rsc, key_rsc, WPA_KEY_RSC_LEN);
1482
1483         if (kde && !encr) {
1484                 os_memcpy(key_data, kde, kde_len);
1485                 if (mic_len == 24)
1486                         WPA_PUT_BE16(key192->key_data_length, kde_len);
1487                 else
1488                         WPA_PUT_BE16(key->key_data_length, kde_len);
1489         } else if (encr && kde) {
1490                 buf = os_zalloc(key_data_len);
1491                 if (buf == NULL) {
1492                         os_free(hdr);
1493                         return;
1494                 }
1495                 pos = buf;
1496                 os_memcpy(pos, kde, kde_len);
1497                 pos += kde_len;
1498
1499                 if (pad_len)
1500                         *pos++ = 0xdd;
1501
1502                 wpa_hexdump_key(MSG_DEBUG, "Plaintext EAPOL-Key Key Data",
1503                                 buf, key_data_len);
1504                 if (version == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1505                     sm->wpa_key_mgmt == WPA_KEY_MGMT_OSEN ||
1506                     wpa_key_mgmt_suite_b(sm->wpa_key_mgmt) ||
1507                     version == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1508                         if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len,
1509                                      (key_data_len - 8) / 8, buf, key_data)) {
1510                                 os_free(hdr);
1511                                 os_free(buf);
1512                                 return;
1513                         }
1514                         if (mic_len == 24)
1515                                 WPA_PUT_BE16(key192->key_data_length,
1516                                              key_data_len);
1517                         else
1518                                 WPA_PUT_BE16(key->key_data_length,
1519                                              key_data_len);
1520                 } else if (sm->PTK.kek_len == 16) {
1521                         u8 ek[32];
1522                         os_memcpy(key->key_iv,
1523                                   sm->group->Counter + WPA_NONCE_LEN - 16, 16);
1524                         inc_byte_array(sm->group->Counter, WPA_NONCE_LEN);
1525                         os_memcpy(ek, key->key_iv, 16);
1526                         os_memcpy(ek + 16, sm->PTK.kek, sm->PTK.kek_len);
1527                         os_memcpy(key_data, buf, key_data_len);
1528                         rc4_skip(ek, 32, 256, key_data, key_data_len);
1529                         if (mic_len == 24)
1530                                 WPA_PUT_BE16(key192->key_data_length,
1531                                              key_data_len);
1532                         else
1533                                 WPA_PUT_BE16(key->key_data_length,
1534                                              key_data_len);
1535                 } else {
1536                         os_free(hdr);
1537                         os_free(buf);
1538                         return;
1539                 }
1540                 os_free(buf);
1541         }
1542
1543         if (key_info & WPA_KEY_INFO_MIC) {
1544                 u8 *key_mic;
1545
1546                 if (!sm->PTK_valid) {
1547                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
1548                                         "PTK not valid when sending EAPOL-Key "
1549                                         "frame");
1550                         os_free(hdr);
1551                         return;
1552                 }
1553
1554                 key_mic = key192->key_mic; /* same offset for key and key192 */
1555                 wpa_eapol_key_mic(sm->PTK.kck, sm->PTK.kck_len,
1556                                   sm->wpa_key_mgmt, version,
1557                                   (u8 *) hdr, len, key_mic);
1558 #ifdef CONFIG_TESTING_OPTIONS
1559                 if (!pairwise &&
1560                     wpa_auth->conf.corrupt_gtk_rekey_mic_probability > 0.0 &&
1561                     drand48() <
1562                     wpa_auth->conf.corrupt_gtk_rekey_mic_probability) {
1563                         wpa_auth_logger(wpa_auth, sm->addr, LOGGER_INFO,
1564                                         "Corrupting group EAPOL-Key Key MIC");
1565                         key_mic[0]++;
1566                 }
1567 #endif /* CONFIG_TESTING_OPTIONS */
1568         }
1569
1570         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_inc_EapolFramesTx,
1571                            1);
1572         wpa_auth_send_eapol(wpa_auth, sm->addr, (u8 *) hdr, len,
1573                             sm->pairwise_set);
1574         os_free(hdr);
1575 }
1576
1577
1578 static void wpa_send_eapol(struct wpa_authenticator *wpa_auth,
1579                            struct wpa_state_machine *sm, int key_info,
1580                            const u8 *key_rsc, const u8 *nonce,
1581                            const u8 *kde, size_t kde_len,
1582                            int keyidx, int encr)
1583 {
1584         int timeout_ms;
1585         int pairwise = key_info & WPA_KEY_INFO_KEY_TYPE;
1586         int ctr;
1587
1588         if (sm == NULL)
1589                 return;
1590
1591         __wpa_send_eapol(wpa_auth, sm, key_info, key_rsc, nonce, kde, kde_len,
1592                          keyidx, encr, 0);
1593
1594         ctr = pairwise ? sm->TimeoutCtr : sm->GTimeoutCtr;
1595         if (ctr == 1 && wpa_auth->conf.tx_status)
1596                 timeout_ms = pairwise ? eapol_key_timeout_first :
1597                         eapol_key_timeout_first_group;
1598         else
1599                 timeout_ms = eapol_key_timeout_subseq;
1600         if (pairwise && ctr == 1 && !(key_info & WPA_KEY_INFO_MIC))
1601                 sm->pending_1_of_4_timeout = 1;
1602         wpa_printf(MSG_DEBUG, "WPA: Use EAPOL-Key timeout of %u ms (retry "
1603                    "counter %d)", timeout_ms, ctr);
1604         eloop_register_timeout(timeout_ms / 1000, (timeout_ms % 1000) * 1000,
1605                                wpa_send_eapol_timeout, wpa_auth, sm);
1606 }
1607
1608
1609 static int wpa_verify_key_mic(int akmp, struct wpa_ptk *PTK, u8 *data,
1610                               size_t data_len)
1611 {
1612         struct ieee802_1x_hdr *hdr;
1613         struct wpa_eapol_key *key;
1614         struct wpa_eapol_key_192 *key192;
1615         u16 key_info;
1616         int ret = 0;
1617         u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
1618         size_t mic_len = wpa_mic_len(akmp);
1619
1620         if (data_len < sizeof(*hdr) + sizeof(*key))
1621                 return -1;
1622
1623         hdr = (struct ieee802_1x_hdr *) data;
1624         key = (struct wpa_eapol_key *) (hdr + 1);
1625         key192 = (struct wpa_eapol_key_192 *) (hdr + 1);
1626         key_info = WPA_GET_BE16(key->key_info);
1627         os_memcpy(mic, key192->key_mic, mic_len);
1628         os_memset(key192->key_mic, 0, mic_len);
1629         if (wpa_eapol_key_mic(PTK->kck, PTK->kck_len, akmp,
1630                               key_info & WPA_KEY_INFO_TYPE_MASK,
1631                               data, data_len, key192->key_mic) ||
1632             os_memcmp_const(mic, key192->key_mic, mic_len) != 0)
1633                 ret = -1;
1634         os_memcpy(key192->key_mic, mic, mic_len);
1635         return ret;
1636 }
1637
1638
1639 void wpa_remove_ptk(struct wpa_state_machine *sm)
1640 {
1641         sm->PTK_valid = FALSE;
1642         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1643         wpa_auth_set_key(sm->wpa_auth, 0, WPA_ALG_NONE, sm->addr, 0, NULL, 0);
1644         sm->pairwise_set = FALSE;
1645         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
1646 }
1647
1648
1649 int wpa_auth_sm_event(struct wpa_state_machine *sm, wpa_event event)
1650 {
1651         int remove_ptk = 1;
1652
1653         if (sm == NULL)
1654                 return -1;
1655
1656         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1657                          "event %d notification", event);
1658
1659         switch (event) {
1660         case WPA_AUTH:
1661 #ifdef CONFIG_MESH
1662                 /* PTKs are derived through AMPE */
1663                 if (wpa_auth_start_ampe(sm->wpa_auth, sm->addr)) {
1664                         /* not mesh */
1665                         break;
1666                 }
1667                 return 0;
1668 #endif /* CONFIG_MESH */
1669         case WPA_ASSOC:
1670                 break;
1671         case WPA_DEAUTH:
1672         case WPA_DISASSOC:
1673                 sm->DeauthenticationRequest = TRUE;
1674                 break;
1675         case WPA_REAUTH:
1676         case WPA_REAUTH_EAPOL:
1677                 if (!sm->started) {
1678                         /*
1679                          * When using WPS, we may end up here if the STA
1680                          * manages to re-associate without the previous STA
1681                          * entry getting removed. Consequently, we need to make
1682                          * sure that the WPA state machines gets initialized
1683                          * properly at this point.
1684                          */
1685                         wpa_printf(MSG_DEBUG, "WPA state machine had not been "
1686                                    "started - initialize now");
1687                         sm->started = 1;
1688                         sm->Init = TRUE;
1689                         if (wpa_sm_step(sm) == 1)
1690                                 return 1; /* should not really happen */
1691                         sm->Init = FALSE;
1692                         sm->AuthenticationRequest = TRUE;
1693                         break;
1694                 }
1695                 if (sm->GUpdateStationKeys) {
1696                         /*
1697                          * Reauthentication cancels the pending group key
1698                          * update for this STA.
1699                          */
1700                         sm->group->GKeyDoneStations--;
1701                         sm->GUpdateStationKeys = FALSE;
1702                         sm->PtkGroupInit = TRUE;
1703                 }
1704                 sm->ReAuthenticationRequest = TRUE;
1705                 break;
1706         case WPA_ASSOC_FT:
1707 #ifdef CONFIG_IEEE80211R
1708                 wpa_printf(MSG_DEBUG, "FT: Retry PTK configuration "
1709                            "after association");
1710                 wpa_ft_install_ptk(sm);
1711
1712                 /* Using FT protocol, not WPA auth state machine */
1713                 sm->ft_completed = 1;
1714                 return 0;
1715 #else /* CONFIG_IEEE80211R */
1716                 break;
1717 #endif /* CONFIG_IEEE80211R */
1718         }
1719
1720 #ifdef CONFIG_IEEE80211R
1721         sm->ft_completed = 0;
1722 #endif /* CONFIG_IEEE80211R */
1723
1724 #ifdef CONFIG_IEEE80211W
1725         if (sm->mgmt_frame_prot && event == WPA_AUTH)
1726                 remove_ptk = 0;
1727 #endif /* CONFIG_IEEE80211W */
1728
1729         if (remove_ptk) {
1730                 sm->PTK_valid = FALSE;
1731                 os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1732
1733                 if (event != WPA_REAUTH_EAPOL)
1734                         wpa_remove_ptk(sm);
1735         }
1736
1737         return wpa_sm_step(sm);
1738 }
1739
1740
1741 SM_STATE(WPA_PTK, INITIALIZE)
1742 {
1743         SM_ENTRY_MA(WPA_PTK, INITIALIZE, wpa_ptk);
1744         if (sm->Init) {
1745                 /* Init flag is not cleared here, so avoid busy
1746                  * loop by claiming nothing changed. */
1747                 sm->changed = FALSE;
1748         }
1749
1750         sm->keycount = 0;
1751         if (sm->GUpdateStationKeys)
1752                 sm->group->GKeyDoneStations--;
1753         sm->GUpdateStationKeys = FALSE;
1754         if (sm->wpa == WPA_VERSION_WPA)
1755                 sm->PInitAKeys = FALSE;
1756         if (1 /* Unicast cipher supported AND (ESS OR ((IBSS or WDS) and
1757                * Local AA > Remote AA)) */) {
1758                 sm->Pair = TRUE;
1759         }
1760         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 0);
1761         wpa_remove_ptk(sm);
1762         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid, 0);
1763         sm->TimeoutCtr = 0;
1764         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
1765                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
1766                                    WPA_EAPOL_authorized, 0);
1767         }
1768 }
1769
1770
1771 SM_STATE(WPA_PTK, DISCONNECT)
1772 {
1773         SM_ENTRY_MA(WPA_PTK, DISCONNECT, wpa_ptk);
1774         sm->Disconnect = FALSE;
1775         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
1776 }
1777
1778
1779 SM_STATE(WPA_PTK, DISCONNECTED)
1780 {
1781         SM_ENTRY_MA(WPA_PTK, DISCONNECTED, wpa_ptk);
1782         sm->DeauthenticationRequest = FALSE;
1783 }
1784
1785
1786 SM_STATE(WPA_PTK, AUTHENTICATION)
1787 {
1788         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION, wpa_ptk);
1789         os_memset(&sm->PTK, 0, sizeof(sm->PTK));
1790         sm->PTK_valid = FALSE;
1791         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portControl_Auto,
1792                            1);
1793         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portEnabled, 1);
1794         sm->AuthenticationRequest = FALSE;
1795 }
1796
1797
1798 static void wpa_group_ensure_init(struct wpa_authenticator *wpa_auth,
1799                                   struct wpa_group *group)
1800 {
1801         if (group->first_sta_seen)
1802                 return;
1803         /*
1804          * System has run bit further than at the time hostapd was started
1805          * potentially very early during boot up. This provides better chances
1806          * of collecting more randomness on embedded systems. Re-initialize the
1807          * GMK and Counter here to improve their strength if there was not
1808          * enough entropy available immediately after system startup.
1809          */
1810         wpa_printf(MSG_DEBUG, "WPA: Re-initialize GMK/Counter on first "
1811                    "station");
1812         if (random_pool_ready() != 1) {
1813                 wpa_printf(MSG_INFO, "WPA: Not enough entropy in random pool "
1814                            "to proceed - reject first 4-way handshake");
1815                 group->reject_4way_hs_for_entropy = TRUE;
1816         } else {
1817                 group->first_sta_seen = TRUE;
1818                 group->reject_4way_hs_for_entropy = FALSE;
1819         }
1820
1821         wpa_group_init_gmk_and_counter(wpa_auth, group);
1822         wpa_gtk_update(wpa_auth, group);
1823         wpa_group_config_group_keys(wpa_auth, group);
1824 }
1825
1826
1827 SM_STATE(WPA_PTK, AUTHENTICATION2)
1828 {
1829         SM_ENTRY_MA(WPA_PTK, AUTHENTICATION2, wpa_ptk);
1830
1831         wpa_group_ensure_init(sm->wpa_auth, sm->group);
1832         sm->ReAuthenticationRequest = FALSE;
1833
1834         /*
1835          * Definition of ANonce selection in IEEE Std 802.11i-2004 is somewhat
1836          * ambiguous. The Authenticator state machine uses a counter that is
1837          * incremented by one for each 4-way handshake. However, the security
1838          * analysis of 4-way handshake points out that unpredictable nonces
1839          * help in preventing precomputation attacks. Instead of the state
1840          * machine definition, use an unpredictable nonce value here to provide
1841          * stronger protection against potential precomputation attacks.
1842          */
1843         if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
1844                 wpa_printf(MSG_ERROR, "WPA: Failed to get random data for "
1845                            "ANonce.");
1846                 sm->Disconnect = TRUE;
1847                 return;
1848         }
1849         wpa_hexdump(MSG_DEBUG, "WPA: Assign ANonce", sm->ANonce,
1850                     WPA_NONCE_LEN);
1851         /* IEEE 802.11i does not clear TimeoutCtr here, but this is more
1852          * logical place than INITIALIZE since AUTHENTICATION2 can be
1853          * re-entered on ReAuthenticationRequest without going through
1854          * INITIALIZE. */
1855         sm->TimeoutCtr = 0;
1856 }
1857
1858
1859 SM_STATE(WPA_PTK, INITPMK)
1860 {
1861         u8 msk[2 * PMK_LEN];
1862         size_t len = 2 * PMK_LEN;
1863
1864         SM_ENTRY_MA(WPA_PTK, INITPMK, wpa_ptk);
1865 #ifdef CONFIG_IEEE80211R
1866         sm->xxkey_len = 0;
1867 #endif /* CONFIG_IEEE80211R */
1868         if (sm->pmksa) {
1869                 wpa_printf(MSG_DEBUG, "WPA: PMK from PMKSA cache");
1870                 os_memcpy(sm->PMK, sm->pmksa->pmk, PMK_LEN);
1871         } else if (wpa_auth_get_msk(sm->wpa_auth, sm->addr, msk, &len) == 0) {
1872                 wpa_printf(MSG_DEBUG, "WPA: PMK from EAPOL state machine "
1873                            "(len=%lu)", (unsigned long) len);
1874                 os_memcpy(sm->PMK, msk, PMK_LEN);
1875 #ifdef CONFIG_IEEE80211R
1876                 if (len >= 2 * PMK_LEN) {
1877                         os_memcpy(sm->xxkey, msk + PMK_LEN, PMK_LEN);
1878                         sm->xxkey_len = PMK_LEN;
1879                 }
1880 #endif /* CONFIG_IEEE80211R */
1881         } else {
1882                 wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
1883                            sm->wpa_auth->cb.get_msk);
1884                 sm->Disconnect = TRUE;
1885                 return;
1886         }
1887         os_memset(msk, 0, sizeof(msk));
1888
1889         sm->req_replay_counter_used = 0;
1890         /* IEEE 802.11i does not set keyRun to FALSE, but not doing this
1891          * will break reauthentication since EAPOL state machines may not be
1892          * get into AUTHENTICATING state that clears keyRun before WPA state
1893          * machine enters AUTHENTICATION2 state and goes immediately to INITPMK
1894          * state and takes PMK from the previously used AAA Key. This will
1895          * eventually fail in 4-Way Handshake because Supplicant uses PMK
1896          * derived from the new AAA Key. Setting keyRun = FALSE here seems to
1897          * be good workaround for this issue. */
1898         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyRun, 0);
1899 }
1900
1901
1902 SM_STATE(WPA_PTK, INITPSK)
1903 {
1904         const u8 *psk;
1905         SM_ENTRY_MA(WPA_PTK, INITPSK, wpa_ptk);
1906         psk = wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr, NULL);
1907         if (psk) {
1908                 os_memcpy(sm->PMK, psk, PMK_LEN);
1909 #ifdef CONFIG_IEEE80211R
1910                 os_memcpy(sm->xxkey, psk, PMK_LEN);
1911                 sm->xxkey_len = PMK_LEN;
1912 #endif /* CONFIG_IEEE80211R */
1913         }
1914         sm->req_replay_counter_used = 0;
1915 }
1916
1917
1918 SM_STATE(WPA_PTK, PTKSTART)
1919 {
1920         u8 buf[2 + RSN_SELECTOR_LEN + PMKID_LEN], *pmkid = NULL;
1921         size_t pmkid_len = 0;
1922
1923         SM_ENTRY_MA(WPA_PTK, PTKSTART, wpa_ptk);
1924         sm->PTKRequest = FALSE;
1925         sm->TimeoutEvt = FALSE;
1926         sm->alt_snonce_valid = FALSE;
1927
1928         sm->TimeoutCtr++;
1929         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
1930                 /* No point in sending the EAPOL-Key - we will disconnect
1931                  * immediately following this. */
1932                 return;
1933         }
1934
1935         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
1936                         "sending 1/4 msg of 4-Way Handshake");
1937         /*
1938          * TODO: Could add PMKID even with WPA2-PSK, but only if there is only
1939          * one possible PSK for this STA.
1940          */
1941         if (sm->wpa == WPA_VERSION_WPA2 &&
1942             wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
1943             sm->wpa_key_mgmt != WPA_KEY_MGMT_OSEN) {
1944                 pmkid = buf;
1945                 pmkid_len = 2 + RSN_SELECTOR_LEN + PMKID_LEN;
1946                 pmkid[0] = WLAN_EID_VENDOR_SPECIFIC;
1947                 pmkid[1] = RSN_SELECTOR_LEN + PMKID_LEN;
1948                 RSN_SELECTOR_PUT(&pmkid[2], RSN_KEY_DATA_PMKID);
1949                 if (sm->pmksa) {
1950                         os_memcpy(&pmkid[2 + RSN_SELECTOR_LEN],
1951                                   sm->pmksa->pmkid, PMKID_LEN);
1952                 } else if (wpa_key_mgmt_suite_b(sm->wpa_key_mgmt)) {
1953                         /* No KCK available to derive PMKID */
1954                         pmkid = NULL;
1955                 } else {
1956                         /*
1957                          * Calculate PMKID since no PMKSA cache entry was
1958                          * available with pre-calculated PMKID.
1959                          */
1960                         rsn_pmkid(sm->PMK, PMK_LEN, sm->wpa_auth->addr,
1961                                   sm->addr, &pmkid[2 + RSN_SELECTOR_LEN],
1962                                   wpa_key_mgmt_sha256(sm->wpa_key_mgmt));
1963                 }
1964         }
1965         wpa_send_eapol(sm->wpa_auth, sm,
1966                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_KEY_TYPE, NULL,
1967                        sm->ANonce, pmkid, pmkid_len, 0, 0);
1968 }
1969
1970
1971 static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
1972                           const u8 *pmk, struct wpa_ptk *ptk)
1973 {
1974 #ifdef CONFIG_IEEE80211R
1975         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt))
1976                 return wpa_auth_derive_ptk_ft(sm, pmk, ptk);
1977 #endif /* CONFIG_IEEE80211R */
1978
1979         return wpa_pmk_to_ptk(pmk, PMK_LEN, "Pairwise key expansion",
1980                               sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
1981                               ptk, sm->wpa_key_mgmt, sm->pairwise);
1982 }
1983
1984
1985 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING)
1986 {
1987         struct wpa_ptk PTK;
1988         int ok = 0;
1989         const u8 *pmk = NULL;
1990
1991         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING, wpa_ptk);
1992         sm->EAPOLKeyReceived = FALSE;
1993         sm->update_snonce = FALSE;
1994
1995         /* WPA with IEEE 802.1X: use the derived PMK from EAP
1996          * WPA-PSK: iterate through possible PSKs and select the one matching
1997          * the packet */
1998         for (;;) {
1999                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2000                         pmk = wpa_auth_get_psk(sm->wpa_auth, sm->addr,
2001                                                sm->p2p_dev_addr, pmk);
2002                         if (pmk == NULL)
2003                                 break;
2004                 } else
2005                         pmk = sm->PMK;
2006
2007                 wpa_derive_ptk(sm, sm->SNonce, pmk, &PTK);
2008
2009                 if (wpa_verify_key_mic(sm->wpa_key_mgmt, &PTK,
2010                                        sm->last_rx_eapol_key,
2011                                        sm->last_rx_eapol_key_len) == 0) {
2012                         ok = 1;
2013                         break;
2014                 }
2015
2016                 if (!wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt))
2017                         break;
2018         }
2019
2020         if (!ok) {
2021                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2022                                 "invalid MIC in msg 2/4 of 4-Way Handshake");
2023                 return;
2024         }
2025
2026 #ifdef CONFIG_IEEE80211R
2027         if (sm->wpa == WPA_VERSION_WPA2 && wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2028                 /*
2029                  * Verify that PMKR1Name from EAPOL-Key message 2/4 matches
2030                  * with the value we derived.
2031                  */
2032                 if (os_memcmp_const(sm->sup_pmk_r1_name, sm->pmk_r1_name,
2033                                     WPA_PMK_NAME_LEN) != 0) {
2034                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2035                                         "PMKR1Name mismatch in FT 4-way "
2036                                         "handshake");
2037                         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from "
2038                                     "Supplicant",
2039                                     sm->sup_pmk_r1_name, WPA_PMK_NAME_LEN);
2040                         wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
2041                                     sm->pmk_r1_name, WPA_PMK_NAME_LEN);
2042                         return;
2043                 }
2044         }
2045 #endif /* CONFIG_IEEE80211R */
2046
2047         sm->pending_1_of_4_timeout = 0;
2048         eloop_cancel_timeout(wpa_send_eapol_timeout, sm->wpa_auth, sm);
2049
2050         if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2051                 /* PSK may have changed from the previous choice, so update
2052                  * state machine data based on whatever PSK was selected here.
2053                  */
2054                 os_memcpy(sm->PMK, pmk, PMK_LEN);
2055         }
2056
2057         sm->MICVerified = TRUE;
2058
2059         os_memcpy(&sm->PTK, &PTK, sizeof(PTK));
2060         sm->PTK_valid = TRUE;
2061 }
2062
2063
2064 SM_STATE(WPA_PTK, PTKCALCNEGOTIATING2)
2065 {
2066         SM_ENTRY_MA(WPA_PTK, PTKCALCNEGOTIATING2, wpa_ptk);
2067         sm->TimeoutCtr = 0;
2068 }
2069
2070
2071 #ifdef CONFIG_IEEE80211W
2072
2073 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2074 {
2075         if (sm->mgmt_frame_prot) {
2076                 size_t len;
2077                 len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2078                 return 2 + RSN_SELECTOR_LEN + WPA_IGTK_KDE_PREFIX_LEN + len;
2079         }
2080
2081         return 0;
2082 }
2083
2084
2085 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2086 {
2087         struct wpa_igtk_kde igtk;
2088         struct wpa_group *gsm = sm->group;
2089         u8 rsc[WPA_KEY_RSC_LEN];
2090         size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2091
2092         if (!sm->mgmt_frame_prot)
2093                 return pos;
2094
2095         igtk.keyid[0] = gsm->GN_igtk;
2096         igtk.keyid[1] = 0;
2097         if (gsm->wpa_group_state != WPA_GROUP_SETKEYSDONE ||
2098             wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, rsc) < 0)
2099                 os_memset(igtk.pn, 0, sizeof(igtk.pn));
2100         else
2101                 os_memcpy(igtk.pn, rsc, sizeof(igtk.pn));
2102         os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], len);
2103         if (sm->wpa_auth->conf.disable_gtk) {
2104                 /*
2105                  * Provide unique random IGTK to each STA to prevent use of
2106                  * IGTK in the BSS.
2107                  */
2108                 if (random_get_bytes(igtk.igtk, len) < 0)
2109                         return pos;
2110         }
2111         pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,
2112                           (const u8 *) &igtk, WPA_IGTK_KDE_PREFIX_LEN + len,
2113                           NULL, 0);
2114
2115         return pos;
2116 }
2117
2118 #else /* CONFIG_IEEE80211W */
2119
2120 static int ieee80211w_kde_len(struct wpa_state_machine *sm)
2121 {
2122         return 0;
2123 }
2124
2125
2126 static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
2127 {
2128         return pos;
2129 }
2130
2131 #endif /* CONFIG_IEEE80211W */
2132
2133
2134 SM_STATE(WPA_PTK, PTKINITNEGOTIATING)
2135 {
2136         u8 rsc[WPA_KEY_RSC_LEN], *_rsc, *gtk, *kde, *pos, dummy_gtk[32];
2137         size_t gtk_len, kde_len;
2138         struct wpa_group *gsm = sm->group;
2139         u8 *wpa_ie;
2140         int wpa_ie_len, secure, keyidx, encr = 0;
2141
2142         SM_ENTRY_MA(WPA_PTK, PTKINITNEGOTIATING, wpa_ptk);
2143         sm->TimeoutEvt = FALSE;
2144
2145         sm->TimeoutCtr++;
2146         if (sm->TimeoutCtr > (int) dot11RSNAConfigPairwiseUpdateCount) {
2147                 /* No point in sending the EAPOL-Key - we will disconnect
2148                  * immediately following this. */
2149                 return;
2150         }
2151
2152         /* Send EAPOL(1, 1, 1, Pair, P, RSC, ANonce, MIC(PTK), RSNIE, [MDIE],
2153            GTK[GN], IGTK, [FTIE], [TIE * 2])
2154          */
2155         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2156         wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2157         /* If FT is used, wpa_auth->wpa_ie includes both RSNIE and MDIE */
2158         wpa_ie = sm->wpa_auth->wpa_ie;
2159         wpa_ie_len = sm->wpa_auth->wpa_ie_len;
2160         if (sm->wpa == WPA_VERSION_WPA &&
2161             (sm->wpa_auth->conf.wpa & WPA_PROTO_RSN) &&
2162             wpa_ie_len > wpa_ie[1] + 2 && wpa_ie[0] == WLAN_EID_RSN) {
2163                 /* WPA-only STA, remove RSN IE and possible MDIE */
2164                 wpa_ie = wpa_ie + wpa_ie[1] + 2;
2165                 if (wpa_ie[0] == WLAN_EID_MOBILITY_DOMAIN)
2166                         wpa_ie = wpa_ie + wpa_ie[1] + 2;
2167                 wpa_ie_len = wpa_ie[1] + 2;
2168         }
2169         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2170                         "sending 3/4 msg of 4-Way Handshake");
2171         if (sm->wpa == WPA_VERSION_WPA2) {
2172                 /* WPA2 send GTK in the 4-way handshake */
2173                 secure = 1;
2174                 gtk = gsm->GTK[gsm->GN - 1];
2175                 gtk_len = gsm->GTK_len;
2176                 if (sm->wpa_auth->conf.disable_gtk) {
2177                         /*
2178                          * Provide unique random GTK to each STA to prevent use
2179                          * of GTK in the BSS.
2180                          */
2181                         if (random_get_bytes(dummy_gtk, gtk_len) < 0)
2182                                 return;
2183                         gtk = dummy_gtk;
2184                 }
2185                 keyidx = gsm->GN;
2186                 _rsc = rsc;
2187                 encr = 1;
2188         } else {
2189                 /* WPA does not include GTK in msg 3/4 */
2190                 secure = 0;
2191                 gtk = NULL;
2192                 gtk_len = 0;
2193                 keyidx = 0;
2194                 _rsc = NULL;
2195                 if (sm->rx_eapol_key_secure) {
2196                         /*
2197                          * It looks like Windows 7 supplicant tries to use
2198                          * Secure bit in msg 2/4 after having reported Michael
2199                          * MIC failure and it then rejects the 4-way handshake
2200                          * if msg 3/4 does not set Secure bit. Work around this
2201                          * by setting the Secure bit here even in the case of
2202                          * WPA if the supplicant used it first.
2203                          */
2204                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2205                                         "STA used Secure bit in WPA msg 2/4 - "
2206                                         "set Secure for 3/4 as workaround");
2207                         secure = 1;
2208                 }
2209         }
2210
2211         kde_len = wpa_ie_len + ieee80211w_kde_len(sm);
2212         if (gtk)
2213                 kde_len += 2 + RSN_SELECTOR_LEN + 2 + gtk_len;
2214 #ifdef CONFIG_IEEE80211R
2215         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2216                 kde_len += 2 + PMKID_LEN; /* PMKR1Name into RSN IE */
2217                 kde_len += 300; /* FTIE + 2 * TIE */
2218         }
2219 #endif /* CONFIG_IEEE80211R */
2220 #ifdef CONFIG_P2P
2221         if (WPA_GET_BE32(sm->ip_addr) > 0)
2222                 kde_len += 2 + RSN_SELECTOR_LEN + 3 * 4;
2223 #endif /* CONFIG_P2P */
2224         kde = os_malloc(kde_len);
2225         if (kde == NULL)
2226                 return;
2227
2228         pos = kde;
2229         os_memcpy(pos, wpa_ie, wpa_ie_len);
2230         pos += wpa_ie_len;
2231 #ifdef CONFIG_IEEE80211R
2232         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2233                 int res = wpa_insert_pmkid(kde, pos - kde, sm->pmk_r1_name);
2234                 if (res < 0) {
2235                         wpa_printf(MSG_ERROR, "FT: Failed to insert "
2236                                    "PMKR1Name into RSN IE in EAPOL-Key data");
2237                         os_free(kde);
2238                         return;
2239                 }
2240                 pos += res;
2241         }
2242 #endif /* CONFIG_IEEE80211R */
2243         if (gtk) {
2244                 u8 hdr[2];
2245                 hdr[0] = keyidx & 0x03;
2246                 hdr[1] = 0;
2247                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2248                                   gtk, gtk_len);
2249         }
2250         pos = ieee80211w_kde_add(sm, pos);
2251
2252 #ifdef CONFIG_IEEE80211R
2253         if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
2254                 int res;
2255                 struct wpa_auth_config *conf;
2256
2257                 conf = &sm->wpa_auth->conf;
2258                 res = wpa_write_ftie(conf, conf->r0_key_holder,
2259                                      conf->r0_key_holder_len,
2260                                      NULL, NULL, pos, kde + kde_len - pos,
2261                                      NULL, 0);
2262                 if (res < 0) {
2263                         wpa_printf(MSG_ERROR, "FT: Failed to insert FTIE "
2264                                    "into EAPOL-Key Key Data");
2265                         os_free(kde);
2266                         return;
2267                 }
2268                 pos += res;
2269
2270                 /* TIE[ReassociationDeadline] (TU) */
2271                 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2272                 *pos++ = 5;
2273                 *pos++ = WLAN_TIMEOUT_REASSOC_DEADLINE;
2274                 WPA_PUT_LE32(pos, conf->reassociation_deadline);
2275                 pos += 4;
2276
2277                 /* TIE[KeyLifetime] (seconds) */
2278                 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
2279                 *pos++ = 5;
2280                 *pos++ = WLAN_TIMEOUT_KEY_LIFETIME;
2281                 WPA_PUT_LE32(pos, conf->r0_key_lifetime * 60);
2282                 pos += 4;
2283         }
2284 #endif /* CONFIG_IEEE80211R */
2285 #ifdef CONFIG_P2P
2286         if (WPA_GET_BE32(sm->ip_addr) > 0) {
2287                 u8 addr[3 * 4];
2288                 os_memcpy(addr, sm->ip_addr, 4);
2289                 os_memcpy(addr + 4, sm->wpa_auth->conf.ip_addr_mask, 4);
2290                 os_memcpy(addr + 8, sm->wpa_auth->conf.ip_addr_go, 4);
2291                 pos = wpa_add_kde(pos, WFA_KEY_DATA_IP_ADDR_ALLOC,
2292                                   addr, sizeof(addr), NULL, 0);
2293         }
2294 #endif /* CONFIG_P2P */
2295
2296         wpa_send_eapol(sm->wpa_auth, sm,
2297                        (secure ? WPA_KEY_INFO_SECURE : 0) | WPA_KEY_INFO_MIC |
2298                        WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL |
2299                        WPA_KEY_INFO_KEY_TYPE,
2300                        _rsc, sm->ANonce, kde, pos - kde, keyidx, encr);
2301         os_free(kde);
2302 }
2303
2304
2305 SM_STATE(WPA_PTK, PTKINITDONE)
2306 {
2307         SM_ENTRY_MA(WPA_PTK, PTKINITDONE, wpa_ptk);
2308         sm->EAPOLKeyReceived = FALSE;
2309         if (sm->Pair) {
2310                 enum wpa_alg alg = wpa_cipher_to_alg(sm->pairwise);
2311                 int klen = wpa_cipher_key_len(sm->pairwise);
2312                 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
2313                                      sm->PTK.tk, klen)) {
2314                         wpa_sta_disconnect(sm->wpa_auth, sm->addr);
2315                         return;
2316                 }
2317                 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
2318                 sm->pairwise_set = TRUE;
2319
2320                 if (sm->wpa_auth->conf.wpa_ptk_rekey) {
2321                         eloop_cancel_timeout(wpa_rekey_ptk, sm->wpa_auth, sm);
2322                         eloop_register_timeout(sm->wpa_auth->conf.
2323                                                wpa_ptk_rekey, 0, wpa_rekey_ptk,
2324                                                sm->wpa_auth, sm);
2325                 }
2326
2327                 if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)) {
2328                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2329                                            WPA_EAPOL_authorized, 1);
2330                 }
2331         }
2332
2333         if (0 /* IBSS == TRUE */) {
2334                 sm->keycount++;
2335                 if (sm->keycount == 2) {
2336                         wpa_auth_set_eapol(sm->wpa_auth, sm->addr,
2337                                            WPA_EAPOL_portValid, 1);
2338                 }
2339         } else {
2340                 wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_portValid,
2341                                    1);
2342         }
2343         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyAvailable, 0);
2344         wpa_auth_set_eapol(sm->wpa_auth, sm->addr, WPA_EAPOL_keyDone, 1);
2345         if (sm->wpa == WPA_VERSION_WPA)
2346                 sm->PInitAKeys = TRUE;
2347         else
2348                 sm->has_GTK = TRUE;
2349         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2350                          "pairwise key handshake completed (%s)",
2351                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2352
2353 #ifdef CONFIG_IEEE80211R
2354         wpa_ft_push_pmk_r1(sm->wpa_auth, sm->addr);
2355 #endif /* CONFIG_IEEE80211R */
2356 }
2357
2358
2359 SM_STEP(WPA_PTK)
2360 {
2361         struct wpa_authenticator *wpa_auth = sm->wpa_auth;
2362
2363         if (sm->Init)
2364                 SM_ENTER(WPA_PTK, INITIALIZE);
2365         else if (sm->Disconnect
2366                  /* || FIX: dot11RSNAConfigSALifetime timeout */) {
2367                 wpa_auth_logger(wpa_auth, sm->addr, LOGGER_DEBUG,
2368                                 "WPA_PTK: sm->Disconnect");
2369                 SM_ENTER(WPA_PTK, DISCONNECT);
2370         }
2371         else if (sm->DeauthenticationRequest)
2372                 SM_ENTER(WPA_PTK, DISCONNECTED);
2373         else if (sm->AuthenticationRequest)
2374                 SM_ENTER(WPA_PTK, AUTHENTICATION);
2375         else if (sm->ReAuthenticationRequest)
2376                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2377         else if (sm->PTKRequest)
2378                 SM_ENTER(WPA_PTK, PTKSTART);
2379         else switch (sm->wpa_ptk_state) {
2380         case WPA_PTK_INITIALIZE:
2381                 break;
2382         case WPA_PTK_DISCONNECT:
2383                 SM_ENTER(WPA_PTK, DISCONNECTED);
2384                 break;
2385         case WPA_PTK_DISCONNECTED:
2386                 SM_ENTER(WPA_PTK, INITIALIZE);
2387                 break;
2388         case WPA_PTK_AUTHENTICATION:
2389                 SM_ENTER(WPA_PTK, AUTHENTICATION2);
2390                 break;
2391         case WPA_PTK_AUTHENTICATION2:
2392                 if (wpa_key_mgmt_wpa_ieee8021x(sm->wpa_key_mgmt) &&
2393                     wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2394                                        WPA_EAPOL_keyRun) > 0)
2395                         SM_ENTER(WPA_PTK, INITPMK);
2396                 else if (wpa_key_mgmt_wpa_psk(sm->wpa_key_mgmt)
2397                          /* FIX: && 802.1X::keyRun */)
2398                         SM_ENTER(WPA_PTK, INITPSK);
2399                 break;
2400         case WPA_PTK_INITPMK:
2401                 if (wpa_auth_get_eapol(sm->wpa_auth, sm->addr,
2402                                        WPA_EAPOL_keyAvailable) > 0)
2403                         SM_ENTER(WPA_PTK, PTKSTART);
2404                 else {
2405                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
2406                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2407                                         "INITPMK - keyAvailable = false");
2408                         SM_ENTER(WPA_PTK, DISCONNECT);
2409                 }
2410                 break;
2411         case WPA_PTK_INITPSK:
2412                 if (wpa_auth_get_psk(sm->wpa_auth, sm->addr, sm->p2p_dev_addr,
2413                                      NULL))
2414                         SM_ENTER(WPA_PTK, PTKSTART);
2415                 else {
2416                         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2417                                         "no PSK configured for the STA");
2418                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
2419                         SM_ENTER(WPA_PTK, DISCONNECT);
2420                 }
2421                 break;
2422         case WPA_PTK_PTKSTART:
2423                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2424                     sm->EAPOLKeyPairwise)
2425                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2426                 else if (sm->TimeoutCtr >
2427                          (int) dot11RSNAConfigPairwiseUpdateCount) {
2428                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
2429                         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2430                                          "PTKSTART: Retry limit %d reached",
2431                                          dot11RSNAConfigPairwiseUpdateCount);
2432                         SM_ENTER(WPA_PTK, DISCONNECT);
2433                 } else if (sm->TimeoutEvt)
2434                         SM_ENTER(WPA_PTK, PTKSTART);
2435                 break;
2436         case WPA_PTK_PTKCALCNEGOTIATING:
2437                 if (sm->MICVerified)
2438                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING2);
2439                 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2440                          sm->EAPOLKeyPairwise)
2441                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2442                 else if (sm->TimeoutEvt)
2443                         SM_ENTER(WPA_PTK, PTKSTART);
2444                 break;
2445         case WPA_PTK_PTKCALCNEGOTIATING2:
2446                 SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2447                 break;
2448         case WPA_PTK_PTKINITNEGOTIATING:
2449                 if (sm->update_snonce)
2450                         SM_ENTER(WPA_PTK, PTKCALCNEGOTIATING);
2451                 else if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2452                          sm->EAPOLKeyPairwise && sm->MICVerified)
2453                         SM_ENTER(WPA_PTK, PTKINITDONE);
2454                 else if (sm->TimeoutCtr >
2455                          (int) dot11RSNAConfigPairwiseUpdateCount) {
2456                         wpa_auth->dot11RSNA4WayHandshakeFailures++;
2457                         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2458                                          "PTKINITNEGOTIATING: Retry limit %d "
2459                                          "reached",
2460                                          dot11RSNAConfigPairwiseUpdateCount);
2461                         SM_ENTER(WPA_PTK, DISCONNECT);
2462                 } else if (sm->TimeoutEvt)
2463                         SM_ENTER(WPA_PTK, PTKINITNEGOTIATING);
2464                 break;
2465         case WPA_PTK_PTKINITDONE:
2466                 break;
2467         }
2468 }
2469
2470
2471 SM_STATE(WPA_PTK_GROUP, IDLE)
2472 {
2473         SM_ENTRY_MA(WPA_PTK_GROUP, IDLE, wpa_ptk_group);
2474         if (sm->Init) {
2475                 /* Init flag is not cleared here, so avoid busy
2476                  * loop by claiming nothing changed. */
2477                 sm->changed = FALSE;
2478         }
2479         sm->GTimeoutCtr = 0;
2480 }
2481
2482
2483 SM_STATE(WPA_PTK_GROUP, REKEYNEGOTIATING)
2484 {
2485         u8 rsc[WPA_KEY_RSC_LEN];
2486         struct wpa_group *gsm = sm->group;
2487         const u8 *kde;
2488         u8 *kde_buf = NULL, *pos, hdr[2];
2489         size_t kde_len;
2490         u8 *gtk, dummy_gtk[32];
2491
2492         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYNEGOTIATING, wpa_ptk_group);
2493
2494         sm->GTimeoutCtr++;
2495         if (sm->GTimeoutCtr > (int) dot11RSNAConfigGroupUpdateCount) {
2496                 /* No point in sending the EAPOL-Key - we will disconnect
2497                  * immediately following this. */
2498                 return;
2499         }
2500
2501         if (sm->wpa == WPA_VERSION_WPA)
2502                 sm->PInitAKeys = FALSE;
2503         sm->TimeoutEvt = FALSE;
2504         /* Send EAPOL(1, 1, 1, !Pair, G, RSC, GNonce, MIC(PTK), GTK[GN]) */
2505         os_memset(rsc, 0, WPA_KEY_RSC_LEN);
2506         if (gsm->wpa_group_state == WPA_GROUP_SETKEYSDONE)
2507                 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, rsc);
2508         wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2509                         "sending 1/2 msg of Group Key Handshake");
2510
2511         gtk = gsm->GTK[gsm->GN - 1];
2512         if (sm->wpa_auth->conf.disable_gtk) {
2513                 /*
2514                  * Provide unique random GTK to each STA to prevent use
2515                  * of GTK in the BSS.
2516                  */
2517                 if (random_get_bytes(dummy_gtk, gsm->GTK_len) < 0)
2518                         return;
2519                 gtk = dummy_gtk;
2520         }
2521         if (sm->wpa == WPA_VERSION_WPA2) {
2522                 kde_len = 2 + RSN_SELECTOR_LEN + 2 + gsm->GTK_len +
2523                         ieee80211w_kde_len(sm);
2524                 kde_buf = os_malloc(kde_len);
2525                 if (kde_buf == NULL)
2526                         return;
2527
2528                 kde = pos = kde_buf;
2529                 hdr[0] = gsm->GN & 0x03;
2530                 hdr[1] = 0;
2531                 pos = wpa_add_kde(pos, RSN_KEY_DATA_GROUPKEY, hdr, 2,
2532                                   gtk, gsm->GTK_len);
2533                 pos = ieee80211w_kde_add(sm, pos);
2534                 kde_len = pos - kde;
2535         } else {
2536                 kde = gtk;
2537                 kde_len = gsm->GTK_len;
2538         }
2539
2540         wpa_send_eapol(sm->wpa_auth, sm,
2541                        WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
2542                        WPA_KEY_INFO_ACK |
2543                        (!sm->Pair ? WPA_KEY_INFO_INSTALL : 0),
2544                        rsc, gsm->GNonce, kde, kde_len, gsm->GN, 1);
2545
2546         os_free(kde_buf);
2547 }
2548
2549
2550 SM_STATE(WPA_PTK_GROUP, REKEYESTABLISHED)
2551 {
2552         SM_ENTRY_MA(WPA_PTK_GROUP, REKEYESTABLISHED, wpa_ptk_group);
2553         sm->EAPOLKeyReceived = FALSE;
2554         if (sm->GUpdateStationKeys)
2555                 sm->group->GKeyDoneStations--;
2556         sm->GUpdateStationKeys = FALSE;
2557         sm->GTimeoutCtr = 0;
2558         /* FIX: MLME.SetProtection.Request(TA, Tx_Rx) */
2559         wpa_auth_vlogger(sm->wpa_auth, sm->addr, LOGGER_INFO,
2560                          "group key handshake completed (%s)",
2561                          sm->wpa == WPA_VERSION_WPA ? "WPA" : "RSN");
2562         sm->has_GTK = TRUE;
2563 }
2564
2565
2566 SM_STATE(WPA_PTK_GROUP, KEYERROR)
2567 {
2568         SM_ENTRY_MA(WPA_PTK_GROUP, KEYERROR, wpa_ptk_group);
2569         if (sm->GUpdateStationKeys)
2570                 sm->group->GKeyDoneStations--;
2571         sm->GUpdateStationKeys = FALSE;
2572         sm->Disconnect = TRUE;
2573 }
2574
2575
2576 SM_STEP(WPA_PTK_GROUP)
2577 {
2578         if (sm->Init || sm->PtkGroupInit) {
2579                 SM_ENTER(WPA_PTK_GROUP, IDLE);
2580                 sm->PtkGroupInit = FALSE;
2581         } else switch (sm->wpa_ptk_group_state) {
2582         case WPA_PTK_GROUP_IDLE:
2583                 if (sm->GUpdateStationKeys ||
2584                     (sm->wpa == WPA_VERSION_WPA && sm->PInitAKeys))
2585                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2586                 break;
2587         case WPA_PTK_GROUP_REKEYNEGOTIATING:
2588                 if (sm->EAPOLKeyReceived && !sm->EAPOLKeyRequest &&
2589                     !sm->EAPOLKeyPairwise && sm->MICVerified)
2590                         SM_ENTER(WPA_PTK_GROUP, REKEYESTABLISHED);
2591                 else if (sm->GTimeoutCtr >
2592                          (int) dot11RSNAConfigGroupUpdateCount)
2593                         SM_ENTER(WPA_PTK_GROUP, KEYERROR);
2594                 else if (sm->TimeoutEvt)
2595                         SM_ENTER(WPA_PTK_GROUP, REKEYNEGOTIATING);
2596                 break;
2597         case WPA_PTK_GROUP_KEYERROR:
2598                 SM_ENTER(WPA_PTK_GROUP, IDLE);
2599                 break;
2600         case WPA_PTK_GROUP_REKEYESTABLISHED:
2601                 SM_ENTER(WPA_PTK_GROUP, IDLE);
2602                 break;
2603         }
2604 }
2605
2606
2607 static int wpa_gtk_update(struct wpa_authenticator *wpa_auth,
2608                           struct wpa_group *group)
2609 {
2610         int ret = 0;
2611
2612         os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2613         inc_byte_array(group->Counter, WPA_NONCE_LEN);
2614         if (wpa_gmk_to_gtk(group->GMK, "Group key expansion",
2615                            wpa_auth->addr, group->GNonce,
2616                            group->GTK[group->GN - 1], group->GTK_len) < 0)
2617                 ret = -1;
2618         wpa_hexdump_key(MSG_DEBUG, "GTK",
2619                         group->GTK[group->GN - 1], group->GTK_len);
2620
2621 #ifdef CONFIG_IEEE80211W
2622         if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2623                 size_t len;
2624                 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2625                 os_memcpy(group->GNonce, group->Counter, WPA_NONCE_LEN);
2626                 inc_byte_array(group->Counter, WPA_NONCE_LEN);
2627                 if (wpa_gmk_to_gtk(group->GMK, "IGTK key expansion",
2628                                    wpa_auth->addr, group->GNonce,
2629                                    group->IGTK[group->GN_igtk - 4], len) < 0)
2630                         ret = -1;
2631                 wpa_hexdump_key(MSG_DEBUG, "IGTK",
2632                                 group->IGTK[group->GN_igtk - 4], len);
2633         }
2634 #endif /* CONFIG_IEEE80211W */
2635
2636         return ret;
2637 }
2638
2639
2640 static void wpa_group_gtk_init(struct wpa_authenticator *wpa_auth,
2641                                struct wpa_group *group)
2642 {
2643         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2644                    "GTK_INIT (VLAN-ID %d)", group->vlan_id);
2645         group->changed = FALSE; /* GInit is not cleared here; avoid loop */
2646         group->wpa_group_state = WPA_GROUP_GTK_INIT;
2647
2648         /* GTK[0..N] = 0 */
2649         os_memset(group->GTK, 0, sizeof(group->GTK));
2650         group->GN = 1;
2651         group->GM = 2;
2652 #ifdef CONFIG_IEEE80211W
2653         group->GN_igtk = 4;
2654         group->GM_igtk = 5;
2655 #endif /* CONFIG_IEEE80211W */
2656         /* GTK[GN] = CalcGTK() */
2657         wpa_gtk_update(wpa_auth, group);
2658 }
2659
2660
2661 static int wpa_group_update_sta(struct wpa_state_machine *sm, void *ctx)
2662 {
2663         if (ctx != NULL && ctx != sm->group)
2664                 return 0;
2665
2666         if (sm->wpa_ptk_state != WPA_PTK_PTKINITDONE) {
2667                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2668                                 "Not in PTKINITDONE; skip Group Key update");
2669                 sm->GUpdateStationKeys = FALSE;
2670                 return 0;
2671         }
2672         if (sm->GUpdateStationKeys) {
2673                 /*
2674                  * This should not really happen, so add a debug log entry.
2675                  * Since we clear the GKeyDoneStations before the loop, the
2676                  * station needs to be counted here anyway.
2677                  */
2678                 wpa_auth_logger(sm->wpa_auth, sm->addr, LOGGER_DEBUG,
2679                                 "GUpdateStationKeys was already set when "
2680                                 "marking station for GTK rekeying");
2681         }
2682
2683         /* Do not rekey GTK/IGTK when STA is in WNM-Sleep Mode */
2684         if (sm->is_wnmsleep)
2685                 return 0;
2686
2687         sm->group->GKeyDoneStations++;
2688         sm->GUpdateStationKeys = TRUE;
2689
2690         wpa_sm_step(sm);
2691         return 0;
2692 }
2693
2694
2695 #ifdef CONFIG_WNM
2696 /* update GTK when exiting WNM-Sleep Mode */
2697 void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm)
2698 {
2699         if (sm == NULL || sm->is_wnmsleep)
2700                 return;
2701
2702         wpa_group_update_sta(sm, NULL);
2703 }
2704
2705
2706 void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag)
2707 {
2708         if (sm)
2709                 sm->is_wnmsleep = !!flag;
2710 }
2711
2712
2713 int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2714 {
2715         struct wpa_group *gsm = sm->group;
2716         u8 *start = pos;
2717
2718         /*
2719          * GTK subelement:
2720          * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
2721          * Key[5..32]
2722          */
2723         *pos++ = WNM_SLEEP_SUBELEM_GTK;
2724         *pos++ = 11 + gsm->GTK_len;
2725         /* Key ID in B0-B1 of Key Info */
2726         WPA_PUT_LE16(pos, gsm->GN & 0x03);
2727         pos += 2;
2728         *pos++ = gsm->GTK_len;
2729         if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, pos) != 0)
2730                 return 0;
2731         pos += 8;
2732         os_memcpy(pos, gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2733         pos += gsm->GTK_len;
2734
2735         wpa_printf(MSG_DEBUG, "WNM: GTK Key ID %u in WNM-Sleep Mode exit",
2736                    gsm->GN);
2737         wpa_hexdump_key(MSG_DEBUG, "WNM: GTK in WNM-Sleep Mode exit",
2738                         gsm->GTK[gsm->GN - 1], gsm->GTK_len);
2739
2740         return pos - start;
2741 }
2742
2743
2744 #ifdef CONFIG_IEEE80211W
2745 int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos)
2746 {
2747         struct wpa_group *gsm = sm->group;
2748         u8 *start = pos;
2749         size_t len = wpa_cipher_key_len(sm->wpa_auth->conf.group_mgmt_cipher);
2750
2751         /*
2752          * IGTK subelement:
2753          * Sub-elem ID[1] | Length[1] | KeyID[2] | PN[6] | Key[16]
2754          */
2755         *pos++ = WNM_SLEEP_SUBELEM_IGTK;
2756         *pos++ = 2 + 6 + len;
2757         WPA_PUT_LE16(pos, gsm->GN_igtk);
2758         pos += 2;
2759         if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos) != 0)
2760                 return 0;
2761         pos += 6;
2762
2763         os_memcpy(pos, gsm->IGTK[gsm->GN_igtk - 4], len);
2764         pos += len;
2765
2766         wpa_printf(MSG_DEBUG, "WNM: IGTK Key ID %u in WNM-Sleep Mode exit",
2767                    gsm->GN_igtk);
2768         wpa_hexdump_key(MSG_DEBUG, "WNM: IGTK in WNM-Sleep Mode exit",
2769                         gsm->IGTK[gsm->GN_igtk - 4], len);
2770
2771         return pos - start;
2772 }
2773 #endif /* CONFIG_IEEE80211W */
2774 #endif /* CONFIG_WNM */
2775
2776
2777 static void wpa_group_setkeys(struct wpa_authenticator *wpa_auth,
2778                               struct wpa_group *group)
2779 {
2780         int tmp;
2781
2782         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2783                    "SETKEYS (VLAN-ID %d)", group->vlan_id);
2784         group->changed = TRUE;
2785         group->wpa_group_state = WPA_GROUP_SETKEYS;
2786         group->GTKReKey = FALSE;
2787         tmp = group->GM;
2788         group->GM = group->GN;
2789         group->GN = tmp;
2790 #ifdef CONFIG_IEEE80211W
2791         tmp = group->GM_igtk;
2792         group->GM_igtk = group->GN_igtk;
2793         group->GN_igtk = tmp;
2794 #endif /* CONFIG_IEEE80211W */
2795         /* "GKeyDoneStations = GNoStations" is done in more robust way by
2796          * counting the STAs that are marked with GUpdateStationKeys instead of
2797          * including all STAs that could be in not-yet-completed state. */
2798         wpa_gtk_update(wpa_auth, group);
2799
2800         if (group->GKeyDoneStations) {
2801                 wpa_printf(MSG_DEBUG, "wpa_group_setkeys: Unexpected "
2802                            "GKeyDoneStations=%d when starting new GTK rekey",
2803                            group->GKeyDoneStations);
2804                 group->GKeyDoneStations = 0;
2805         }
2806         wpa_auth_for_each_sta(wpa_auth, wpa_group_update_sta, group);
2807         wpa_printf(MSG_DEBUG, "wpa_group_setkeys: GKeyDoneStations=%d",
2808                    group->GKeyDoneStations);
2809 }
2810
2811
2812 static int wpa_group_config_group_keys(struct wpa_authenticator *wpa_auth,
2813                                        struct wpa_group *group)
2814 {
2815         int ret = 0;
2816
2817         if (wpa_auth_set_key(wpa_auth, group->vlan_id,
2818                              wpa_cipher_to_alg(wpa_auth->conf.wpa_group),
2819                              broadcast_ether_addr, group->GN,
2820                              group->GTK[group->GN - 1], group->GTK_len) < 0)
2821                 ret = -1;
2822
2823 #ifdef CONFIG_IEEE80211W
2824         if (wpa_auth->conf.ieee80211w != NO_MGMT_FRAME_PROTECTION) {
2825                 enum wpa_alg alg;
2826                 size_t len;
2827
2828                 alg = wpa_cipher_to_alg(wpa_auth->conf.group_mgmt_cipher);
2829                 len = wpa_cipher_key_len(wpa_auth->conf.group_mgmt_cipher);
2830
2831                 if (ret == 0 &&
2832                     wpa_auth_set_key(wpa_auth, group->vlan_id, alg,
2833                                      broadcast_ether_addr, group->GN_igtk,
2834                                      group->IGTK[group->GN_igtk - 4], len) < 0)
2835                         ret = -1;
2836         }
2837 #endif /* CONFIG_IEEE80211W */
2838
2839         return ret;
2840 }
2841
2842
2843 static int wpa_group_disconnect_cb(struct wpa_state_machine *sm, void *ctx)
2844 {
2845         if (sm->group == ctx) {
2846                 wpa_printf(MSG_DEBUG, "WPA: Mark STA " MACSTR
2847                            " for discconnection due to fatal failure",
2848                            MAC2STR(sm->addr));
2849                 sm->Disconnect = TRUE;
2850         }
2851
2852         return 0;
2853 }
2854
2855
2856 static void wpa_group_fatal_failure(struct wpa_authenticator *wpa_auth,
2857                                     struct wpa_group *group)
2858 {
2859         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state FATAL_FAILURE");
2860         group->changed = TRUE;
2861         group->wpa_group_state = WPA_GROUP_FATAL_FAILURE;
2862         wpa_auth_for_each_sta(wpa_auth, wpa_group_disconnect_cb, group);
2863 }
2864
2865
2866 static int wpa_group_setkeysdone(struct wpa_authenticator *wpa_auth,
2867                                  struct wpa_group *group)
2868 {
2869         wpa_printf(MSG_DEBUG, "WPA: group state machine entering state "
2870                    "SETKEYSDONE (VLAN-ID %d)", group->vlan_id);
2871         group->changed = TRUE;
2872         group->wpa_group_state = WPA_GROUP_SETKEYSDONE;
2873
2874         if (wpa_group_config_group_keys(wpa_auth, group) < 0) {
2875                 wpa_group_fatal_failure(wpa_auth, group);
2876                 return -1;
2877         }
2878
2879         return 0;
2880 }
2881
2882
2883 static void wpa_group_sm_step(struct wpa_authenticator *wpa_auth,
2884                               struct wpa_group *group)
2885 {
2886         if (group->GInit) {
2887                 wpa_group_gtk_init(wpa_auth, group);
2888         } else if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE) {
2889                 /* Do not allow group operations */
2890         } else if (group->wpa_group_state == WPA_GROUP_GTK_INIT &&
2891                    group->GTKAuthenticator) {
2892                 wpa_group_setkeysdone(wpa_auth, group);
2893         } else if (group->wpa_group_state == WPA_GROUP_SETKEYSDONE &&
2894                    group->GTKReKey) {
2895                 wpa_group_setkeys(wpa_auth, group);
2896         } else if (group->wpa_group_state == WPA_GROUP_SETKEYS) {
2897                 if (group->GKeyDoneStations == 0)
2898                         wpa_group_setkeysdone(wpa_auth, group);
2899                 else if (group->GTKReKey)
2900                         wpa_group_setkeys(wpa_auth, group);
2901         }
2902 }
2903
2904
2905 static int wpa_sm_step(struct wpa_state_machine *sm)
2906 {
2907         if (sm == NULL)
2908                 return 0;
2909
2910         if (sm->in_step_loop) {
2911                 /* This should not happen, but if it does, make sure we do not
2912                  * end up freeing the state machine too early by exiting the
2913                  * recursive call. */
2914                 wpa_printf(MSG_ERROR, "WPA: wpa_sm_step() called recursively");
2915                 return 0;
2916         }
2917
2918         sm->in_step_loop = 1;
2919         do {
2920                 if (sm->pending_deinit)
2921                         break;
2922
2923                 sm->changed = FALSE;
2924                 sm->wpa_auth->group->changed = FALSE;
2925
2926                 SM_STEP_RUN(WPA_PTK);
2927                 if (sm->pending_deinit)
2928                         break;
2929                 SM_STEP_RUN(WPA_PTK_GROUP);
2930                 if (sm->pending_deinit)
2931                         break;
2932                 wpa_group_sm_step(sm->wpa_auth, sm->group);
2933         } while (sm->changed || sm->wpa_auth->group->changed);
2934         sm->in_step_loop = 0;
2935
2936         if (sm->pending_deinit) {
2937                 wpa_printf(MSG_DEBUG, "WPA: Completing pending STA state "
2938                            "machine deinit for " MACSTR, MAC2STR(sm->addr));
2939                 wpa_free_sta_sm(sm);
2940                 return 1;
2941         }
2942         return 0;
2943 }
2944
2945
2946 static void wpa_sm_call_step(void *eloop_ctx, void *timeout_ctx)
2947 {
2948         struct wpa_state_machine *sm = eloop_ctx;
2949         wpa_sm_step(sm);
2950 }
2951
2952
2953 void wpa_auth_sm_notify(struct wpa_state_machine *sm)
2954 {
2955         if (sm == NULL)
2956                 return;
2957         eloop_register_timeout(0, 0, wpa_sm_call_step, sm, NULL);
2958 }
2959
2960
2961 void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth)
2962 {
2963         int tmp, i;
2964         struct wpa_group *group;
2965
2966         if (wpa_auth == NULL)
2967                 return;
2968
2969         group = wpa_auth->group;
2970
2971         for (i = 0; i < 2; i++) {
2972                 tmp = group->GM;
2973                 group->GM = group->GN;
2974                 group->GN = tmp;
2975 #ifdef CONFIG_IEEE80211W
2976                 tmp = group->GM_igtk;
2977                 group->GM_igtk = group->GN_igtk;
2978                 group->GN_igtk = tmp;
2979 #endif /* CONFIG_IEEE80211W */
2980                 wpa_gtk_update(wpa_auth, group);
2981                 wpa_group_config_group_keys(wpa_auth, group);
2982         }
2983 }
2984
2985
2986 static const char * wpa_bool_txt(int bool)
2987 {
2988         return bool ? "TRUE" : "FALSE";
2989 }
2990
2991
2992 #define RSN_SUITE "%02x-%02x-%02x-%d"
2993 #define RSN_SUITE_ARG(s) \
2994 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
2995
2996 int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen)
2997 {
2998         int len = 0, ret;
2999         char pmkid_txt[PMKID_LEN * 2 + 1];
3000 #ifdef CONFIG_RSN_PREAUTH
3001         const int preauth = 1;
3002 #else /* CONFIG_RSN_PREAUTH */
3003         const int preauth = 0;
3004 #endif /* CONFIG_RSN_PREAUTH */
3005
3006         if (wpa_auth == NULL)
3007                 return len;
3008
3009         ret = os_snprintf(buf + len, buflen - len,
3010                           "dot11RSNAOptionImplemented=TRUE\n"
3011                           "dot11RSNAPreauthenticationImplemented=%s\n"
3012                           "dot11RSNAEnabled=%s\n"
3013                           "dot11RSNAPreauthenticationEnabled=%s\n",
3014                           wpa_bool_txt(preauth),
3015                           wpa_bool_txt(wpa_auth->conf.wpa & WPA_PROTO_RSN),
3016                           wpa_bool_txt(wpa_auth->conf.rsn_preauth));
3017         if (os_snprintf_error(buflen - len, ret))
3018                 return len;
3019         len += ret;
3020
3021         wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
3022                          wpa_auth->dot11RSNAPMKIDUsed, PMKID_LEN);
3023
3024         ret = os_snprintf(
3025                 buf + len, buflen - len,
3026                 "dot11RSNAConfigVersion=%u\n"
3027                 "dot11RSNAConfigPairwiseKeysSupported=9999\n"
3028                 /* FIX: dot11RSNAConfigGroupCipher */
3029                 /* FIX: dot11RSNAConfigGroupRekeyMethod */
3030                 /* FIX: dot11RSNAConfigGroupRekeyTime */
3031                 /* FIX: dot11RSNAConfigGroupRekeyPackets */
3032                 "dot11RSNAConfigGroupRekeyStrict=%u\n"
3033                 "dot11RSNAConfigGroupUpdateCount=%u\n"
3034                 "dot11RSNAConfigPairwiseUpdateCount=%u\n"
3035                 "dot11RSNAConfigGroupCipherSize=%u\n"
3036                 "dot11RSNAConfigPMKLifetime=%u\n"
3037                 "dot11RSNAConfigPMKReauthThreshold=%u\n"
3038                 "dot11RSNAConfigNumberOfPTKSAReplayCounters=0\n"
3039                 "dot11RSNAConfigSATimeout=%u\n"
3040                 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
3041                 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
3042                 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
3043                 "dot11RSNAPMKIDUsed=%s\n"
3044                 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
3045                 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
3046                 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
3047                 "dot11RSNATKIPCounterMeasuresInvoked=%u\n"
3048                 "dot11RSNA4WayHandshakeFailures=%u\n"
3049                 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n",
3050                 RSN_VERSION,
3051                 !!wpa_auth->conf.wpa_strict_rekey,
3052                 dot11RSNAConfigGroupUpdateCount,
3053                 dot11RSNAConfigPairwiseUpdateCount,
3054                 wpa_cipher_key_len(wpa_auth->conf.wpa_group) * 8,
3055                 dot11RSNAConfigPMKLifetime,
3056                 dot11RSNAConfigPMKReauthThreshold,
3057                 dot11RSNAConfigSATimeout,
3058                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteSelected),
3059                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherSelected),
3060                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherSelected),
3061                 pmkid_txt,
3062                 RSN_SUITE_ARG(wpa_auth->dot11RSNAAuthenticationSuiteRequested),
3063                 RSN_SUITE_ARG(wpa_auth->dot11RSNAPairwiseCipherRequested),
3064                 RSN_SUITE_ARG(wpa_auth->dot11RSNAGroupCipherRequested),
3065                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked,
3066                 wpa_auth->dot11RSNA4WayHandshakeFailures);
3067         if (os_snprintf_error(buflen - len, ret))
3068                 return len;
3069         len += ret;
3070
3071         /* TODO: dot11RSNAConfigPairwiseCiphersTable */
3072         /* TODO: dot11RSNAConfigAuthenticationSuitesTable */
3073
3074         /* Private MIB */
3075         ret = os_snprintf(buf + len, buflen - len, "hostapdWPAGroupState=%d\n",
3076                           wpa_auth->group->wpa_group_state);
3077         if (os_snprintf_error(buflen - len, ret))
3078                 return len;
3079         len += ret;
3080
3081         return len;
3082 }
3083
3084
3085 int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen)
3086 {
3087         int len = 0, ret;
3088         u32 pairwise = 0;
3089
3090         if (sm == NULL)
3091                 return 0;
3092
3093         /* TODO: FF-FF-FF-FF-FF-FF entry for broadcast/multicast stats */
3094
3095         /* dot11RSNAStatsEntry */
3096
3097         pairwise = wpa_cipher_to_suite(sm->wpa == WPA_VERSION_WPA2 ?
3098                                        WPA_PROTO_RSN : WPA_PROTO_WPA,
3099                                        sm->pairwise);
3100         if (pairwise == 0)
3101                 return 0;
3102
3103         ret = os_snprintf(
3104                 buf + len, buflen - len,
3105                 /* TODO: dot11RSNAStatsIndex */
3106                 "dot11RSNAStatsSTAAddress=" MACSTR "\n"
3107                 "dot11RSNAStatsVersion=1\n"
3108                 "dot11RSNAStatsSelectedPairwiseCipher=" RSN_SUITE "\n"
3109                 /* TODO: dot11RSNAStatsTKIPICVErrors */
3110                 "dot11RSNAStatsTKIPLocalMICFailures=%u\n"
3111                 "dot11RSNAStatsTKIPRemoteMICFailures=%u\n"
3112                 /* TODO: dot11RSNAStatsCCMPReplays */
3113                 /* TODO: dot11RSNAStatsCCMPDecryptErrors */
3114                 /* TODO: dot11RSNAStatsTKIPReplays */,
3115                 MAC2STR(sm->addr),
3116                 RSN_SUITE_ARG(pairwise),
3117                 sm->dot11RSNAStatsTKIPLocalMICFailures,
3118                 sm->dot11RSNAStatsTKIPRemoteMICFailures);
3119         if (os_snprintf_error(buflen - len, ret))
3120                 return len;
3121         len += ret;
3122
3123         /* Private MIB */
3124         ret = os_snprintf(buf + len, buflen - len,
3125                           "hostapdWPAPTKState=%d\n"
3126                           "hostapdWPAPTKGroupState=%d\n",
3127                           sm->wpa_ptk_state,
3128                           sm->wpa_ptk_group_state);
3129         if (os_snprintf_error(buflen - len, ret))
3130                 return len;
3131         len += ret;
3132
3133         return len;
3134 }
3135
3136
3137 void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth)
3138 {
3139         if (wpa_auth)
3140                 wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
3141 }
3142
3143
3144 int wpa_auth_pairwise_set(struct wpa_state_machine *sm)
3145 {
3146         return sm && sm->pairwise_set;
3147 }
3148
3149
3150 int wpa_auth_get_pairwise(struct wpa_state_machine *sm)
3151 {
3152         return sm->pairwise;
3153 }
3154
3155
3156 int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm)
3157 {
3158         if (sm == NULL)
3159                 return -1;
3160         return sm->wpa_key_mgmt;
3161 }
3162
3163
3164 int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
3165 {
3166         if (sm == NULL)
3167                 return 0;
3168         return sm->wpa;
3169 }
3170
3171
3172 int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
3173                              struct rsn_pmksa_cache_entry *entry)
3174 {
3175         if (sm == NULL || sm->pmksa != entry)
3176                 return -1;
3177         sm->pmksa = NULL;
3178         return 0;
3179 }
3180
3181
3182 struct rsn_pmksa_cache_entry *
3183 wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm)
3184 {
3185         return sm ? sm->pmksa : NULL;
3186 }
3187
3188
3189 void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm)
3190 {
3191         if (sm)
3192                 sm->dot11RSNAStatsTKIPLocalMICFailures++;
3193 }
3194
3195
3196 const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth, size_t *len)
3197 {
3198         if (wpa_auth == NULL)
3199                 return NULL;
3200         *len = wpa_auth->wpa_ie_len;
3201         return wpa_auth->wpa_ie;
3202 }
3203
3204
3205 int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
3206                        int session_timeout, struct eapol_state_machine *eapol)
3207 {
3208         if (sm == NULL || sm->wpa != WPA_VERSION_WPA2 ||
3209             sm->wpa_auth->conf.disable_pmksa_caching)
3210                 return -1;
3211
3212         if (pmksa_cache_auth_add(sm->wpa_auth->pmksa, pmk, PMK_LEN,
3213                                  sm->PTK.kck, sm->PTK.kck_len,
3214                                  sm->wpa_auth->addr, sm->addr, session_timeout,
3215                                  eapol, sm->wpa_key_mgmt))
3216                 return 0;
3217
3218         return -1;
3219 }
3220
3221
3222 int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
3223                                const u8 *pmk, size_t len, const u8 *sta_addr,
3224                                int session_timeout,
3225                                struct eapol_state_machine *eapol)
3226 {
3227         if (wpa_auth == NULL)
3228                 return -1;
3229
3230         if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, len,
3231                                  NULL, 0,
3232                                  wpa_auth->addr,
3233                                  sta_addr, session_timeout, eapol,
3234                                  WPA_KEY_MGMT_IEEE8021X))
3235                 return 0;
3236
3237         return -1;
3238 }
3239
3240
3241 int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
3242                            const u8 *pmk)
3243 {
3244         if (wpa_auth->conf.disable_pmksa_caching)
3245                 return -1;
3246
3247         if (pmksa_cache_auth_add(wpa_auth->pmksa, pmk, PMK_LEN,
3248                                  NULL, 0,
3249                                  wpa_auth->addr, addr, 0, NULL,
3250                                  WPA_KEY_MGMT_SAE))
3251                 return 0;
3252
3253         return -1;
3254 }
3255
3256
3257 void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
3258                            const u8 *sta_addr)
3259 {
3260         struct rsn_pmksa_cache_entry *pmksa;
3261
3262         if (wpa_auth == NULL || wpa_auth->pmksa == NULL)
3263                 return;
3264         pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sta_addr, NULL);
3265         if (pmksa) {
3266                 wpa_printf(MSG_DEBUG, "WPA: Remove PMKSA cache entry for "
3267                            MACSTR " based on request", MAC2STR(sta_addr));
3268                 pmksa_cache_free_entry(wpa_auth->pmksa, pmksa);
3269         }
3270 }
3271
3272
3273 static struct wpa_group *
3274 wpa_auth_add_group(struct wpa_authenticator *wpa_auth, int vlan_id)
3275 {
3276         struct wpa_group *group;
3277
3278         if (wpa_auth == NULL || wpa_auth->group == NULL)
3279                 return NULL;
3280
3281         wpa_printf(MSG_DEBUG, "WPA: Add group state machine for VLAN-ID %d",
3282                    vlan_id);
3283         group = wpa_group_init(wpa_auth, vlan_id, 0);
3284         if (group == NULL)
3285                 return NULL;
3286
3287         group->next = wpa_auth->group->next;
3288         wpa_auth->group->next = group;
3289
3290         return group;
3291 }
3292
3293
3294 int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id)
3295 {
3296         struct wpa_group *group;
3297
3298         if (sm == NULL || sm->wpa_auth == NULL)
3299                 return 0;
3300
3301         group = sm->wpa_auth->group;
3302         while (group) {
3303                 if (group->vlan_id == vlan_id)
3304                         break;
3305                 group = group->next;
3306         }
3307
3308         if (group == NULL) {
3309                 group = wpa_auth_add_group(sm->wpa_auth, vlan_id);
3310                 if (group == NULL)
3311                         return -1;
3312         }
3313
3314         if (sm->group == group)
3315                 return 0;
3316
3317         if (group->wpa_group_state == WPA_GROUP_FATAL_FAILURE)
3318                 return -1;
3319
3320         wpa_printf(MSG_DEBUG, "WPA: Moving STA " MACSTR " to use group state "
3321                    "machine for VLAN ID %d", MAC2STR(sm->addr), vlan_id);
3322
3323         sm->group = group;
3324         return 0;
3325 }
3326
3327
3328 void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
3329                                   struct wpa_state_machine *sm, int ack)
3330 {
3331         if (wpa_auth == NULL || sm == NULL)
3332                 return;
3333         wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key TX status for STA " MACSTR
3334                    " ack=%d", MAC2STR(sm->addr), ack);
3335         if (sm->pending_1_of_4_timeout && ack) {
3336                 /*
3337                  * Some deployed supplicant implementations update their SNonce
3338                  * for each EAPOL-Key 2/4 message even within the same 4-way
3339                  * handshake and then fail to use the first SNonce when
3340                  * deriving the PTK. This results in unsuccessful 4-way
3341                  * handshake whenever the relatively short initial timeout is
3342                  * reached and EAPOL-Key 1/4 is retransmitted. Try to work
3343                  * around this by increasing the timeout now that we know that
3344                  * the station has received the frame.
3345                  */
3346                 int timeout_ms = eapol_key_timeout_subseq;
3347                 wpa_printf(MSG_DEBUG, "WPA: Increase initial EAPOL-Key 1/4 "
3348                            "timeout by %u ms because of acknowledged frame",
3349                            timeout_ms);
3350                 eloop_cancel_timeout(wpa_send_eapol_timeout, wpa_auth, sm);
3351                 eloop_register_timeout(timeout_ms / 1000,
3352                                        (timeout_ms % 1000) * 1000,
3353                                        wpa_send_eapol_timeout, wpa_auth, sm);
3354         }
3355 }
3356
3357
3358 int wpa_auth_uses_sae(struct wpa_state_machine *sm)
3359 {
3360         if (sm == NULL)
3361                 return 0;
3362         return wpa_key_mgmt_sae(sm->wpa_key_mgmt);
3363 }
3364
3365
3366 int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm)
3367 {
3368         if (sm == NULL)
3369                 return 0;
3370         return sm->wpa_key_mgmt == WPA_KEY_MGMT_FT_SAE;
3371 }
3372
3373
3374 #ifdef CONFIG_P2P
3375 int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr)
3376 {
3377         if (sm == NULL || WPA_GET_BE32(sm->ip_addr) == 0)
3378                 return -1;
3379         os_memcpy(addr, sm->ip_addr, 4);
3380         return 0;
3381 }
3382 #endif /* CONFIG_P2P */
3383
3384
3385 int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
3386                                          struct radius_das_attrs *attr)
3387 {
3388         return pmksa_cache_auth_radius_das_disconnect(wpa_auth->pmksa, attr);
3389 }
3390
3391
3392 void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth)
3393 {
3394         struct wpa_group *group;
3395
3396         if (!wpa_auth)
3397                 return;
3398         for (group = wpa_auth->group; group; group = group->next)
3399                 wpa_group_config_group_keys(wpa_auth, group);
3400 }