src/rsn_supp/wpa.c

   1 /*
   2  * WPA Supplicant - WPA state machine and EAPOL-Key processing
   3  * Copyright (c) 2003-2012, 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 "includes.h"
  10
  11 #include "common.h"
  12 #include "crypto/aes_wrap.h"
  13 #include "crypto/crypto.h"
  14 #include "crypto/random.h"
  15 #include "common/ieee802_11_defs.h"
  16 #include "eapol_supp/eapol_supp_sm.h"
  17 #include "wpa.h"
  18 #include "eloop.h"
  19 #include "preauth.h"
  20 #include "pmksa_cache.h"
  21 #include "wpa_i.h"
  22 #include "wpa_ie.h"
  23 #include "peerkey.h"
  24
  25
  26 /**
  27  * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
  28  * @sm: Pointer to WPA state machine data from wpa_sm_init()
  29  * @kck: Key Confirmation Key (KCK, part of PTK)
  30  * @ver: Version field from Key Info
  31  * @dest: Destination address for the frame
  32  * @proto: Ethertype (usually ETH_P_EAPOL)
  33  * @msg: EAPOL-Key message
  34  * @msg_len: Length of message
  35  * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
  36  */
  37 void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck,
  38                         int ver, const u8 *dest, u16 proto,
  39                         u8 *msg, size_t msg_len, u8 *key_mic)
  40 {
  41         if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
  42                 /*
  43                  * Association event was not yet received; try to fetch
  44                  * BSSID from the driver.
  45                  */
  46                 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
  47                         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
  48                                 "WPA: Failed to read BSSID for "
  49                                 "EAPOL-Key destination address");
  50                 } else {
  51                         dest = sm->bssid;
  52                         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
  53                                 "WPA: Use BSSID (" MACSTR
  54                                 ") as the destination for EAPOL-Key",
  55                                 MAC2STR(dest));
  56                 }
  57         }
  58         if (key_mic &&
  59             wpa_eapol_key_mic(kck, ver, msg, msg_len, key_mic)) {
  60                 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
  61                         "WPA: Failed to generate EAPOL-Key "
  62                         "version %d MIC", ver);
  63                 goto out;
  64         }
  65         wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", kck, 16);
  66         wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", key_mic, 16);
  67         wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
  68         wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
  69         eapol_sm_notify_tx_eapol_key(sm->eapol);
  70 out:
  71         os_free(msg);
  72 }
  73
  74
  75 /**
  76  * wpa_sm_key_request - Send EAPOL-Key Request
  77  * @sm: Pointer to WPA state machine data from wpa_sm_init()
  78  * @error: Indicate whether this is an Michael MIC error report
  79  * @pairwise: 1 = error report for pairwise packet, 0 = for group packet
  80  *
  81  * Send an EAPOL-Key Request to the current authenticator. This function is
  82  * used to request rekeying and it is usually called when a local Michael MIC
  83  * failure is detected.
  84  */
  85 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
  86 {
  87         size_t rlen;
  88         struct wpa_eapol_key *reply;
  89         int key_info, ver;
  90         u8 bssid[ETH_ALEN], *rbuf;
  91
  92         if (wpa_key_mgmt_ft(sm->key_mgmt) || wpa_key_mgmt_sha256(sm->key_mgmt))
  93                 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC;
  94         else if (sm->pairwise_cipher == WPA_CIPHER_CCMP)
  95                 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
  96         else
  97                 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
  98
  99         if (wpa_sm_get_bssid(sm, bssid) < 0) {
 100                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 101                         "Failed to read BSSID for EAPOL-Key request");
 102                 return;
 103         }
 104
 105         rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
 106                                   sizeof(*reply), &rlen, (void *) &reply);
 107         if (rbuf == NULL)
 108                 return;
 109
 110         reply->type = sm->proto == WPA_PROTO_RSN ?
 111                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
 112         key_info = WPA_KEY_INFO_REQUEST | ver;
 113         if (sm->ptk_set)
 114                 key_info |= WPA_KEY_INFO_MIC;
 115         if (error)
 116                 key_info |= WPA_KEY_INFO_ERROR;
 117         if (pairwise)
 118                 key_info |= WPA_KEY_INFO_KEY_TYPE;
 119         WPA_PUT_BE16(reply->key_info, key_info);
 120         WPA_PUT_BE16(reply->key_length, 0);
 121         os_memcpy(reply->replay_counter, sm->request_counter,
 122                   WPA_REPLAY_COUNTER_LEN);
 123         inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
 124
 125         WPA_PUT_BE16(reply->key_data_length, 0);
 126
 127         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
 128                 "WPA: Sending EAPOL-Key Request (error=%d "
 129                 "pairwise=%d ptk_set=%d len=%lu)",
 130                 error, pairwise, sm->ptk_set, (unsigned long) rlen);
 131         wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL,
 132                            rbuf, rlen, key_info & WPA_KEY_INFO_MIC ?
 133                            reply->key_mic : NULL);
 134 }
 135
 136
 137 static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
 138                                   const unsigned char *src_addr,
 139                                   const u8 *pmkid)
 140 {
 141         int abort_cached = 0;
 142
 143         if (pmkid && !sm->cur_pmksa) {
 144                 /* When using drivers that generate RSN IE, wpa_supplicant may
 145                  * not have enough time to get the association information
 146                  * event before receiving this 1/4 message, so try to find a
 147                  * matching PMKSA cache entry here. */
 148                 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid,
 149                                                 NULL);
 150                 if (sm->cur_pmksa) {
 151                         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 152                                 "RSN: found matching PMKID from PMKSA cache");
 153                 } else {
 154                         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 155                                 "RSN: no matching PMKID found");
 156                         abort_cached = 1;
 157                 }
 158         }
 159
 160         if (pmkid && sm->cur_pmksa &&
 161             os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
 162                 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
 163                 wpa_sm_set_pmk_from_pmksa(sm);
 164                 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
 165                                 sm->pmk, sm->pmk_len);
 166                 eapol_sm_notify_cached(sm->eapol);
 167 #ifdef CONFIG_IEEE80211R
 168                 sm->xxkey_len = 0;
 169 #endif /* CONFIG_IEEE80211R */
 170         } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) {
 171                 int res, pmk_len;
 172                 pmk_len = PMK_LEN;
 173                 res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN);
 174                 if (res) {
 175                         /*
 176                          * EAP-LEAP is an exception from other EAP methods: it
 177                          * uses only 16-byte PMK.
 178                          */
 179                         res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
 180                         pmk_len = 16;
 181                 } else {
 182 #ifdef CONFIG_IEEE80211R
 183                         u8 buf[2 * PMK_LEN];
 184                         if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0)
 185                         {
 186                                 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN);
 187                                 sm->xxkey_len = PMK_LEN;
 188                                 os_memset(buf, 0, sizeof(buf));
 189                         }
 190 #endif /* CONFIG_IEEE80211R */
 191                 }
 192                 if (res == 0) {
 193                         wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
 194                                         "machines", sm->pmk, pmk_len);
 195                         sm->pmk_len = pmk_len;
 196                         if (sm->proto == WPA_PROTO_RSN &&
 197                             !wpa_key_mgmt_ft(sm->key_mgmt)) {
 198                                 pmksa_cache_add(sm->pmksa, sm->pmk, pmk_len,
 199                                                 src_addr, sm->own_addr,
 200                                                 sm->network_ctx, sm->key_mgmt);
 201                         }
 202                         if (!sm->cur_pmksa && pmkid &&
 203                             pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL))
 204                         {
 205                                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 206                                         "RSN: the new PMK matches with the "
 207                                         "PMKID");
 208                                 abort_cached = 0;
 209                         }
 210                 } else {
 211                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 212                                 "WPA: Failed to get master session key from "
 213                                 "EAPOL state machines - key handshake "
 214                                 "aborted");
 215                         if (sm->cur_pmksa) {
 216                                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 217                                         "RSN: Cancelled PMKSA caching "
 218                                         "attempt");
 219                                 sm->cur_pmksa = NULL;
 220                                 abort_cached = 1;
 221                         } else if (!abort_cached) {
 222                                 return -1;
 223                         }
 224                 }
 225         }
 226
 227         if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) &&
 228             !wpa_key_mgmt_ft(sm->key_mgmt)) {
 229                 /* Send EAPOL-Start to trigger full EAP authentication. */
 230                 u8 *buf;
 231                 size_t buflen;
 232
 233                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 234                         "RSN: no PMKSA entry found - trigger "
 235                         "full EAP authentication");
 236                 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
 237                                          NULL, 0, &buflen, NULL);
 238                 if (buf) {
 239                         wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
 240                                           buf, buflen);
 241                         os_free(buf);
 242                         return -2;
 243                 }
 244
 245                 return -1;
 246         }
 247
 248         return 0;
 249 }
 250
 251
 252 /**
 253  * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
 254  * @sm: Pointer to WPA state machine data from wpa_sm_init()
 255  * @dst: Destination address for the frame
 256  * @key: Pointer to the EAPOL-Key frame header
 257  * @ver: Version bits from EAPOL-Key Key Info
 258  * @nonce: Nonce value for the EAPOL-Key frame
 259  * @wpa_ie: WPA/RSN IE
 260  * @wpa_ie_len: Length of the WPA/RSN IE
 261  * @ptk: PTK to use for keyed hash and encryption
 262  * Returns: 0 on success, -1 on failure
 263  */
 264 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
 265                                const struct wpa_eapol_key *key,
 266                                int ver, const u8 *nonce,
 267                                const u8 *wpa_ie, size_t wpa_ie_len,
 268                                struct wpa_ptk *ptk)
 269 {
 270         size_t rlen;
 271         struct wpa_eapol_key *reply;
 272         u8 *rbuf;
 273         u8 *rsn_ie_buf = NULL;
 274
 275         if (wpa_ie == NULL) {
 276                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - "
 277                         "cannot generate msg 2/4");
 278                 return -1;
 279         }
 280
 281 #ifdef CONFIG_IEEE80211R
 282         if (wpa_key_mgmt_ft(sm->key_mgmt)) {
 283                 int res;
 284
 285                 /*
 286                  * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
 287                  * FTIE from (Re)Association Response.
 288                  */
 289                 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
 290                                        sm->assoc_resp_ies_len);
 291                 if (rsn_ie_buf == NULL)
 292                         return -1;
 293                 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
 294                 res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len,
 295                                        sm->pmk_r1_name);
 296                 if (res < 0) {
 297                         os_free(rsn_ie_buf);
 298                         return -1;
 299                 }
 300                 wpa_ie_len += res;
 301
 302                 if (sm->assoc_resp_ies) {
 303                         os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
 304                                   sm->assoc_resp_ies_len);
 305                         wpa_ie_len += sm->assoc_resp_ies_len;
 306                 }
 307
 308                 wpa_ie = rsn_ie_buf;
 309         }
 310 #endif /* CONFIG_IEEE80211R */
 311
 312         wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);
 313
 314         rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
 315                                   NULL, sizeof(*reply) + wpa_ie_len,
 316                                   &rlen, (void *) &reply);
 317         if (rbuf == NULL) {
 318                 os_free(rsn_ie_buf);
 319                 return -1;
 320         }
 321
 322         reply->type = sm->proto == WPA_PROTO_RSN ?
 323                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
 324         WPA_PUT_BE16(reply->key_info,
 325                      ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC);
 326         if (sm->proto == WPA_PROTO_RSN)
 327                 WPA_PUT_BE16(reply->key_length, 0);
 328         else
 329                 os_memcpy(reply->key_length, key->key_length, 2);
 330         os_memcpy(reply->replay_counter, key->replay_counter,
 331                   WPA_REPLAY_COUNTER_LEN);
 332         wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter,
 333                     WPA_REPLAY_COUNTER_LEN);
 334
 335         WPA_PUT_BE16(reply->key_data_length, wpa_ie_len);
 336         os_memcpy(reply + 1, wpa_ie, wpa_ie_len);
 337         os_free(rsn_ie_buf);
 338
 339         os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
 340
 341         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4");
 342         wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
 343                            rbuf, rlen, reply->key_mic);
 344
 345         return 0;
 346 }
 347
 348
 349 static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
 350                           const struct wpa_eapol_key *key,
 351                           struct wpa_ptk *ptk)
 352 {
 353         size_t ptk_len = sm->pairwise_cipher == WPA_CIPHER_CCMP ? 48 : 64;
 354 #ifdef CONFIG_IEEE80211R
 355         if (wpa_key_mgmt_ft(sm->key_mgmt))
 356                 return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len);
 357 #endif /* CONFIG_IEEE80211R */
 358
 359         wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
 360                        sm->own_addr, sm->bssid, sm->snonce, key->key_nonce,
 361                        (u8 *) ptk, ptk_len,
 362                        wpa_key_mgmt_sha256(sm->key_mgmt));
 363         return 0;
 364 }
 365
 366
 367 static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
 368                                           const unsigned char *src_addr,
 369                                           const struct wpa_eapol_key *key,
 370                                           u16 ver)
 371 {
 372         struct wpa_eapol_ie_parse ie;
 373         struct wpa_ptk *ptk;
 374         u8 buf[8];
 375         int res;
 376
 377         if (wpa_sm_get_network_ctx(sm) == NULL) {
 378                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info "
 379                         "found (msg 1 of 4)");
 380                 return;
 381         }
 382
 383         wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
 384         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way "
 385                 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
 386
 387         os_memset(&ie, 0, sizeof(ie));
 388
 389 #ifndef CONFIG_NO_WPA2
 390         if (sm->proto == WPA_PROTO_RSN) {
 391                 /* RSN: msg 1/4 should contain PMKID for the selected PMK */
 392                 const u8 *_buf = (const u8 *) (key + 1);
 393                 size_t len = WPA_GET_BE16(key->key_data_length);
 394                 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len);
 395                 if (wpa_supplicant_parse_ies(_buf, len, &ie) < 0)
 396                         goto failed;
 397                 if (ie.pmkid) {
 398                         wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
 399                                     "Authenticator", ie.pmkid, PMKID_LEN);
 400                 }
 401         }
 402 #endif /* CONFIG_NO_WPA2 */
 403
 404         res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid);
 405         if (res == -2) {
 406                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to "
 407                         "msg 1/4 - requesting full EAP authentication");
 408                 return;
 409         }
 410         if (res)
 411                 goto failed;
 412
 413         if (sm->renew_snonce) {
 414                 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
 415                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 416                                 "WPA: Failed to get random data for SNonce");
 417                         goto failed;
 418                 }
 419                 sm->renew_snonce = 0;
 420                 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
 421                             sm->snonce, WPA_NONCE_LEN);
 422         }
 423
 424         /* Calculate PTK which will be stored as a temporary PTK until it has
 425          * been verified when processing message 3/4. */
 426         ptk = &sm->tptk;
 427         wpa_derive_ptk(sm, src_addr, key, ptk);
 428         /* Supplicant: swap tx/rx Mic keys */
 429         os_memcpy(buf, ptk->u.auth.tx_mic_key, 8);
 430         os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8);
 431         os_memcpy(ptk->u.auth.rx_mic_key, buf, 8);
 432         sm->tptk_set = 1;
 433
 434         if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
 435                                        sm->assoc_wpa_ie, sm->assoc_wpa_ie_len,
 436                                        ptk))
 437                 goto failed;
 438
 439         os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
 440         return;
 441
 442 failed:
 443         wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
 444 }
 445
 446
 447 static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
 448 {
 449         struct wpa_sm *sm = eloop_ctx;
 450         rsn_preauth_candidate_process(sm);
 451 }
 452
 453
 454 static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
 455                                             const u8 *addr, int secure)
 456 {
 457         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
 458                 "WPA: Key negotiation completed with "
 459                 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
 460                 wpa_cipher_txt(sm->pairwise_cipher),
 461                 wpa_cipher_txt(sm->group_cipher));
 462         wpa_sm_cancel_auth_timeout(sm);
 463         wpa_sm_set_state(sm, WPA_COMPLETED);
 464
 465         if (secure) {
 466                 wpa_sm_mlme_setprotection(
 467                         sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
 468                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 469                 eapol_sm_notify_portValid(sm->eapol, TRUE);
 470                 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt))
 471                         eapol_sm_notify_eap_success(sm->eapol, TRUE);
 472                 /*
 473                  * Start preauthentication after a short wait to avoid a
 474                  * possible race condition between the data receive and key
 475                  * configuration after the 4-Way Handshake. This increases the
 476                  * likelihood of the first preauth EAPOL-Start frame getting to
 477                  * the target AP.
 478                  */
 479                 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL);
 480         }
 481
 482         if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
 483                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 484                         "RSN: Authenticator accepted "
 485                         "opportunistic PMKSA entry - marking it valid");
 486                 sm->cur_pmksa->opportunistic = 0;
 487         }
 488
 489 #ifdef CONFIG_IEEE80211R
 490         if (wpa_key_mgmt_ft(sm->key_mgmt)) {
 491                 /* Prepare for the next transition */
 492                 wpa_ft_prepare_auth_request(sm, NULL);
 493         }
 494 #endif /* CONFIG_IEEE80211R */
 495 }
 496
 497
 498 static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
 499 {
 500         struct wpa_sm *sm = eloop_ctx;
 501         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying");
 502         wpa_sm_key_request(sm, 0, 1);
 503 }
 504
 505
 506 static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
 507                                       const struct wpa_eapol_key *key)
 508 {
 509         int keylen, rsclen;
 510         enum wpa_alg alg;
 511         const u8 *key_rsc;
 512         u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 513
 514         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 515                 "WPA: Installing PTK to the driver");
 516
 517         switch (sm->pairwise_cipher) {
 518         case WPA_CIPHER_CCMP:
 519                 alg = WPA_ALG_CCMP;
 520                 keylen = 16;
 521                 rsclen = 6;
 522                 break;
 523         case WPA_CIPHER_TKIP:
 524                 alg = WPA_ALG_TKIP;
 525                 keylen = 32;
 526                 rsclen = 6;
 527                 break;
 528         case WPA_CIPHER_NONE:
 529                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher "
 530                         "Suite: NONE - do not use pairwise keys");
 531                 return 0;
 532         default:
 533                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 534                         "WPA: Unsupported pairwise cipher %d",
 535                         sm->pairwise_cipher);
 536                 return -1;
 537         }
 538
 539         if (sm->proto == WPA_PROTO_RSN) {
 540                 key_rsc = null_rsc;
 541         } else {
 542                 key_rsc = key->key_rsc;
 543                 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
 544         }
 545
 546         if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen,
 547                            (u8 *) sm->ptk.tk1, keylen) < 0) {
 548                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 549                         "WPA: Failed to set PTK to the "
 550                         "driver (alg=%d keylen=%d bssid=" MACSTR ")",
 551                         alg, keylen, MAC2STR(sm->bssid));
 552                 return -1;
 553         }
 554
 555         if (sm->wpa_ptk_rekey) {
 556                 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
 557                 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
 558                                        sm, NULL);
 559         }
 560
 561         return 0;
 562 }
 563
 564
 565 static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm,
 566                                              int group_cipher,
 567                                              int keylen, int maxkeylen,
 568                                              int *key_rsc_len,
 569                                              enum wpa_alg *alg)
 570 {
 571         int ret = 0;
 572
 573         switch (group_cipher) {
 574         case WPA_CIPHER_CCMP:
 575                 if (keylen != 16 || maxkeylen < 16) {
 576                         ret = -1;
 577                         break;
 578                 }
 579                 *key_rsc_len = 6;
 580                 *alg = WPA_ALG_CCMP;
 581                 break;
 582         case WPA_CIPHER_TKIP:
 583                 if (keylen != 32 || maxkeylen < 32) {
 584                         ret = -1;
 585                         break;
 586                 }
 587                 *key_rsc_len = 6;
 588                 *alg = WPA_ALG_TKIP;
 589                 break;
 590         case WPA_CIPHER_WEP104:
 591                 if (keylen != 13 || maxkeylen < 13) {
 592                         ret = -1;
 593                         break;
 594                 }
 595                 *key_rsc_len = 0;
 596                 *alg = WPA_ALG_WEP;
 597                 break;
 598         case WPA_CIPHER_WEP40:
 599                 if (keylen != 5 || maxkeylen < 5) {
 600                         ret = -1;
 601                         break;
 602                 }
 603                 *key_rsc_len = 0;
 604                 *alg = WPA_ALG_WEP;
 605                 break;
 606         default:
 607                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 608                         "WPA: Unsupported Group Cipher %d",
 609                         group_cipher);
 610                 return -1;
 611         }
 612
 613         if (ret < 0 ) {
 614                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 615                         "WPA: Unsupported %s Group Cipher key length %d (%d)",
 616                         wpa_cipher_txt(group_cipher), keylen, maxkeylen);
 617         }
 618
 619         return ret;
 620 }
 621
 622
 623 struct wpa_gtk_data {
 624         enum wpa_alg alg;
 625         int tx, key_rsc_len, keyidx;
 626         u8 gtk[32];
 627         int gtk_len;
 628 };
 629
 630
 631 static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
 632                                       const struct wpa_gtk_data *gd,
 633                                       const u8 *key_rsc)
 634 {
 635         const u8 *_gtk = gd->gtk;
 636         u8 gtk_buf[32];
 637
 638         wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
 639         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 640                 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)",
 641                 gd->keyidx, gd->tx, gd->gtk_len);
 642         wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
 643         if (sm->group_cipher == WPA_CIPHER_TKIP) {
 644                 /* Swap Tx/Rx keys for Michael MIC */
 645                 os_memcpy(gtk_buf, gd->gtk, 16);
 646                 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8);
 647                 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8);
 648                 _gtk = gtk_buf;
 649         }
 650         if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
 651                 if (wpa_sm_set_key(sm, gd->alg, NULL,
 652                                    gd->keyidx, 1, key_rsc, gd->key_rsc_len,
 653                                    _gtk, gd->gtk_len) < 0) {
 654                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 655                                 "WPA: Failed to set GTK to the driver "
 656                                 "(Group only)");
 657                         return -1;
 658                 }
 659         } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr,
 660                                   gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
 661                                   _gtk, gd->gtk_len) < 0) {
 662                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 663                         "WPA: Failed to set GTK to "
 664                         "the driver (alg=%d keylen=%d keyidx=%d)",
 665                         gd->alg, gd->gtk_len, gd->keyidx);
 666                 return -1;
 667         }
 668
 669         return 0;
 670 }
 671
 672
 673 static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
 674                                                 int tx)
 675 {
 676         if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
 677                 /* Ignore Tx bit for GTK if a pairwise key is used. One AP
 678                  * seemed to set this bit (incorrectly, since Tx is only when
 679                  * doing Group Key only APs) and without this workaround, the
 680                  * data connection does not work because wpa_supplicant
 681                  * configured non-zero keyidx to be used for unicast. */
 682                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
 683                         "WPA: Tx bit set for GTK, but pairwise "
 684                         "keys are used - ignore Tx bit");
 685                 return 0;
 686         }
 687         return tx;
 688 }
 689
 690
 691 static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
 692                                        const struct wpa_eapol_key *key,
 693                                        const u8 *gtk, size_t gtk_len,
 694                                        int key_info)
 695 {
 696 #ifndef CONFIG_NO_WPA2
 697         struct wpa_gtk_data gd;
 698
 699         /*
 700          * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
 701          * GTK KDE format:
 702          * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
 703          * Reserved [bits 0-7]
 704          * GTK
 705          */
 706
 707         os_memset(&gd, 0, sizeof(gd));
 708         wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
 709                         gtk, gtk_len);
 710
 711         if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
 712                 return -1;
 713
 714         gd.keyidx = gtk[0] & 0x3;
 715         gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
 716                                                      !!(gtk[0] & BIT(2)));
 717         gtk += 2;
 718         gtk_len -= 2;
 719
 720         os_memcpy(gd.gtk, gtk, gtk_len);
 721         gd.gtk_len = gtk_len;
 722
 723         if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
 724                                               gtk_len, gtk_len,
 725                                               &gd.key_rsc_len, &gd.alg) ||
 726             wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) {
 727                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 728                         "RSN: Failed to install GTK");
 729                 return -1;
 730         }
 731
 732         wpa_supplicant_key_neg_complete(sm, sm->bssid,
 733                                         key_info & WPA_KEY_INFO_SECURE);
 734         return 0;
 735 #else /* CONFIG_NO_WPA2 */
 736         return -1;
 737 #endif /* CONFIG_NO_WPA2 */
 738 }
 739
 740
 741 static int ieee80211w_set_keys(struct wpa_sm *sm,
 742                                struct wpa_eapol_ie_parse *ie)
 743 {
 744 #ifdef CONFIG_IEEE80211W
 745         if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC)
 746                 return 0;
 747
 748         if (ie->igtk) {
 749                 const struct wpa_igtk_kde *igtk;
 750                 u16 keyidx;
 751                 if (ie->igtk_len != sizeof(*igtk))
 752                         return -1;
 753                 igtk = (const struct wpa_igtk_kde *) ie->igtk;
 754                 keyidx = WPA_GET_LE16(igtk->keyid);
 755                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d "
 756                         "pn %02x%02x%02x%02x%02x%02x",
 757                         keyidx, MAC2STR(igtk->pn));
 758                 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK",
 759                                 igtk->igtk, WPA_IGTK_LEN);
 760                 if (keyidx > 4095) {
 761                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 762                                 "WPA: Invalid IGTK KeyID %d", keyidx);
 763                         return -1;
 764                 }
 765                 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr,
 766                                    keyidx, 0, igtk->pn, sizeof(igtk->pn),
 767                                    igtk->igtk, WPA_IGTK_LEN) < 0) {
 768                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 769                                 "WPA: Failed to configure IGTK to the driver");
 770                         return -1;
 771                 }
 772         }
 773
 774         return 0;
 775 #else /* CONFIG_IEEE80211W */
 776         return 0;
 777 #endif /* CONFIG_IEEE80211W */
 778 }
 779
 780
 781 static void wpa_report_ie_mismatch(struct wpa_sm *sm,
 782                                    const char *reason, const u8 *src_addr,
 783                                    const u8 *wpa_ie, size_t wpa_ie_len,
 784                                    const u8 *rsn_ie, size_t rsn_ie_len)
 785 {
 786         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")",
 787                 reason, MAC2STR(src_addr));
 788
 789         if (sm->ap_wpa_ie) {
 790                 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
 791                             sm->ap_wpa_ie, sm->ap_wpa_ie_len);
 792         }
 793         if (wpa_ie) {
 794                 if (!sm->ap_wpa_ie) {
 795                         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
 796                                 "WPA: No WPA IE in Beacon/ProbeResp");
 797                 }
 798                 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
 799                             wpa_ie, wpa_ie_len);
 800         }
 801
 802         if (sm->ap_rsn_ie) {
 803                 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
 804                             sm->ap_rsn_ie, sm->ap_rsn_ie_len);
 805         }
 806         if (rsn_ie) {
 807                 if (!sm->ap_rsn_ie) {
 808                         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
 809                                 "WPA: No RSN IE in Beacon/ProbeResp");
 810                 }
 811                 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
 812                             rsn_ie, rsn_ie_len);
 813         }
 814
 815         wpa_sm_disassociate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
 816 }
 817
 818
 819 #ifdef CONFIG_IEEE80211R
 820
 821 static int ft_validate_mdie(struct wpa_sm *sm,
 822                             const unsigned char *src_addr,
 823                             struct wpa_eapol_ie_parse *ie,
 824                             const u8 *assoc_resp_mdie)
 825 {
 826         struct rsn_mdie *mdie;
 827
 828         mdie = (struct rsn_mdie *) (ie->mdie + 2);
 829         if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) ||
 830             os_memcmp(mdie->mobility_domain, sm->mobility_domain,
 831                       MOBILITY_DOMAIN_ID_LEN) != 0) {
 832                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did "
 833                         "not match with the current mobility domain");
 834                 return -1;
 835         }
 836
 837         if (assoc_resp_mdie &&
 838             (assoc_resp_mdie[1] != ie->mdie[1] ||
 839              os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) {
 840                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch");
 841                 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4",
 842                             ie->mdie, 2 + ie->mdie[1]);
 843                 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response",
 844                             assoc_resp_mdie, 2 + assoc_resp_mdie[1]);
 845                 return -1;
 846         }
 847
 848         return 0;
 849 }
 850
 851
 852 static int ft_validate_ftie(struct wpa_sm *sm,
 853                             const unsigned char *src_addr,
 854                             struct wpa_eapol_ie_parse *ie,
 855                             const u8 *assoc_resp_ftie)
 856 {
 857         if (ie->ftie == NULL) {
 858                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 859                         "FT: No FTIE in EAPOL-Key msg 3/4");
 860                 return -1;
 861         }
 862
 863         if (assoc_resp_ftie == NULL)
 864                 return 0;
 865
 866         if (assoc_resp_ftie[1] != ie->ftie[1] ||
 867             os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) {
 868                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch");
 869                 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4",
 870                             ie->ftie, 2 + ie->ftie[1]);
 871                 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response",
 872                             assoc_resp_ftie, 2 + assoc_resp_ftie[1]);
 873                 return -1;
 874         }
 875
 876         return 0;
 877 }
 878
 879
 880 static int ft_validate_rsnie(struct wpa_sm *sm,
 881                              const unsigned char *src_addr,
 882                              struct wpa_eapol_ie_parse *ie)
 883 {
 884         struct wpa_ie_data rsn;
 885
 886         if (!ie->rsn_ie)
 887                 return 0;
 888
 889         /*
 890          * Verify that PMKR1Name from EAPOL-Key message 3/4
 891          * matches with the value we derived.
 892          */
 893         if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 ||
 894             rsn.num_pmkid != 1 || rsn.pmkid == NULL) {
 895                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in "
 896                         "FT 4-way handshake message 3/4");
 897                 return -1;
 898         }
 899
 900         if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) {
 901                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 902                         "FT: PMKR1Name mismatch in "
 903                         "FT 4-way handshake message 3/4");
 904                 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator",
 905                             rsn.pmkid, WPA_PMK_NAME_LEN);
 906                 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
 907                             sm->pmk_r1_name, WPA_PMK_NAME_LEN);
 908                 return -1;
 909         }
 910
 911         return 0;
 912 }
 913
 914
 915 static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm,
 916                                          const unsigned char *src_addr,
 917                                          struct wpa_eapol_ie_parse *ie)
 918 {
 919         const u8 *pos, *end, *mdie = NULL, *ftie = NULL;
 920
 921         if (sm->assoc_resp_ies) {
 922                 pos = sm->assoc_resp_ies;
 923                 end = pos + sm->assoc_resp_ies_len;
 924                 while (pos + 2 < end) {
 925                         if (pos + 2 + pos[1] > end)
 926                                 break;
 927                         switch (*pos) {
 928                         case WLAN_EID_MOBILITY_DOMAIN:
 929                                 mdie = pos;
 930                                 break;
 931                         case WLAN_EID_FAST_BSS_TRANSITION:
 932                                 ftie = pos;
 933                                 break;
 934                         }
 935                         pos += 2 + pos[1];
 936                 }
 937         }
 938
 939         if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 ||
 940             ft_validate_ftie(sm, src_addr, ie, ftie) < 0 ||
 941             ft_validate_rsnie(sm, src_addr, ie) < 0)
 942                 return -1;
 943
 944         return 0;
 945 }
 946
 947 #endif /* CONFIG_IEEE80211R */
 948
 949
 950 static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
 951                                       const unsigned char *src_addr,
 952                                       struct wpa_eapol_ie_parse *ie)
 953 {
 954         if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
 955                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
 956                         "WPA: No WPA/RSN IE for this AP known. "
 957                         "Trying to get from scan results");
 958                 if (wpa_sm_get_beacon_ie(sm) < 0) {
 959                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
 960                                 "WPA: Could not find AP from "
 961                                 "the scan results");
 962                 } else {
 963                         wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG,
 964                                 "WPA: Found the current AP from "
 965                                 "updated scan results");
 966                 }
 967         }
 968
 969         if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
 970             (sm->ap_wpa_ie || sm->ap_rsn_ie)) {
 971                 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
 972                                        "with IE in Beacon/ProbeResp (no IE?)",
 973                                        src_addr, ie->wpa_ie, ie->wpa_ie_len,
 974                                        ie->rsn_ie, ie->rsn_ie_len);
 975                 return -1;
 976         }
 977
 978         if ((ie->wpa_ie && sm->ap_wpa_ie &&
 979              (ie->wpa_ie_len != sm->ap_wpa_ie_len ||
 980               os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
 981             (ie->rsn_ie && sm->ap_rsn_ie &&
 982              wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
 983                                 sm->ap_rsn_ie, sm->ap_rsn_ie_len,
 984                                 ie->rsn_ie, ie->rsn_ie_len))) {
 985                 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
 986                                        "with IE in Beacon/ProbeResp",
 987                                        src_addr, ie->wpa_ie, ie->wpa_ie_len,
 988                                        ie->rsn_ie, ie->rsn_ie_len);
 989                 return -1;
 990         }
 991
 992         if (sm->proto == WPA_PROTO_WPA &&
 993             ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
 994                 wpa_report_ie_mismatch(sm, "Possible downgrade attack "
 995                                        "detected - RSN was enabled and RSN IE "
 996                                        "was in msg 3/4, but not in "
 997                                        "Beacon/ProbeResp",
 998                                        src_addr, ie->wpa_ie, ie->wpa_ie_len,
 999                                        ie->rsn_ie, ie->rsn_ie_len);
1000                 return -1;
1001         }
1002
1003 #ifdef CONFIG_IEEE80211R
1004         if (wpa_key_mgmt_ft(sm->key_mgmt) &&
1005             wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0)
1006                 return -1;
1007 #endif /* CONFIG_IEEE80211R */
1008
1009         return 0;
1010 }
1011
1012
1013 /**
1014  * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
1015  * @sm: Pointer to WPA state machine data from wpa_sm_init()
1016  * @dst: Destination address for the frame
1017  * @key: Pointer to the EAPOL-Key frame header
1018  * @ver: Version bits from EAPOL-Key Key Info
1019  * @key_info: Key Info
1020  * @kde: KDEs to include the EAPOL-Key frame
1021  * @kde_len: Length of KDEs
1022  * @ptk: PTK to use for keyed hash and encryption
1023  * Returns: 0 on success, -1 on failure
1024  */
1025 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
1026                                const struct wpa_eapol_key *key,
1027                                u16 ver, u16 key_info,
1028                                const u8 *kde, size_t kde_len,
1029                                struct wpa_ptk *ptk)
1030 {
1031         size_t rlen;
1032         struct wpa_eapol_key *reply;
1033         u8 *rbuf;
1034
1035         if (kde)
1036                 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len);
1037
1038         rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1039                                   sizeof(*reply) + kde_len,
1040                                   &rlen, (void *) &reply);
1041         if (rbuf == NULL)
1042                 return -1;
1043
1044         reply->type = sm->proto == WPA_PROTO_RSN ?
1045                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1046         key_info &= WPA_KEY_INFO_SECURE;
1047         key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC;
1048         WPA_PUT_BE16(reply->key_info, key_info);
1049         if (sm->proto == WPA_PROTO_RSN)
1050                 WPA_PUT_BE16(reply->key_length, 0);
1051         else
1052                 os_memcpy(reply->key_length, key->key_length, 2);
1053         os_memcpy(reply->replay_counter, key->replay_counter,
1054                   WPA_REPLAY_COUNTER_LEN);
1055
1056         WPA_PUT_BE16(reply->key_data_length, kde_len);
1057         if (kde)
1058                 os_memcpy(reply + 1, kde, kde_len);
1059
1060         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4");
1061         wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
1062                            rbuf, rlen, reply->key_mic);
1063
1064         return 0;
1065 }
1066
1067
1068 static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
1069                                           const struct wpa_eapol_key *key,
1070                                           u16 ver)
1071 {
1072         u16 key_info, keylen, len;
1073         const u8 *pos;
1074         struct wpa_eapol_ie_parse ie;
1075
1076         wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
1077         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way "
1078                 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver);
1079
1080         key_info = WPA_GET_BE16(key->key_info);
1081
1082         pos = (const u8 *) (key + 1);
1083         len = WPA_GET_BE16(key->key_data_length);
1084         wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len);
1085         if (wpa_supplicant_parse_ies(pos, len, &ie) < 0)
1086                 goto failed;
1087         if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1088                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1089                         "WPA: GTK IE in unencrypted key data");
1090                 goto failed;
1091         }
1092 #ifdef CONFIG_IEEE80211W
1093         if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1094                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1095                         "WPA: IGTK KDE in unencrypted key data");
1096                 goto failed;
1097         }
1098
1099         if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) {
1100                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1101                         "WPA: Invalid IGTK KDE length %lu",
1102                         (unsigned long) ie.igtk_len);
1103                 goto failed;
1104         }
1105 #endif /* CONFIG_IEEE80211W */
1106
1107         if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
1108                 goto failed;
1109
1110         if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
1111                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1112                         "WPA: ANonce from message 1 of 4-Way Handshake "
1113                         "differs from 3 of 4-Way Handshake - drop packet (src="
1114                         MACSTR ")", MAC2STR(sm->bssid));
1115                 goto failed;
1116         }
1117
1118         keylen = WPA_GET_BE16(key->key_length);
1119         switch (sm->pairwise_cipher) {
1120         case WPA_CIPHER_CCMP:
1121                 if (keylen != 16) {
1122                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1123                                 "WPA: Invalid CCMP key length %d (src=" MACSTR
1124                                 ")", keylen, MAC2STR(sm->bssid));
1125                         goto failed;
1126                 }
1127                 break;
1128         case WPA_CIPHER_TKIP:
1129                 if (keylen != 32) {
1130                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1131                                 "WPA: Invalid TKIP key length %d (src=" MACSTR
1132                                 ")", keylen, MAC2STR(sm->bssid));
1133                         goto failed;
1134                 }
1135                 break;
1136         }
1137
1138         if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
1139                                        NULL, 0, &sm->ptk)) {
1140                 goto failed;
1141         }
1142
1143         /* SNonce was successfully used in msg 3/4, so mark it to be renewed
1144          * for the next 4-Way Handshake. If msg 3 is received again, the old
1145          * SNonce will still be used to avoid changing PTK. */
1146         sm->renew_snonce = 1;
1147
1148         if (key_info & WPA_KEY_INFO_INSTALL) {
1149                 if (wpa_supplicant_install_ptk(sm, key))
1150                         goto failed;
1151         }
1152
1153         if (key_info & WPA_KEY_INFO_SECURE) {
1154                 wpa_sm_mlme_setprotection(
1155                         sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
1156                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
1157                 eapol_sm_notify_portValid(sm->eapol, TRUE);
1158         }
1159         wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1160
1161         if (ie.gtk &&
1162             wpa_supplicant_pairwise_gtk(sm, key,
1163                                         ie.gtk, ie.gtk_len, key_info) < 0) {
1164                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1165                         "RSN: Failed to configure GTK");
1166                 goto failed;
1167         }
1168
1169         if (ieee80211w_set_keys(sm, &ie) < 0) {
1170                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1171                         "RSN: Failed to configure IGTK");
1172                 goto failed;
1173         }
1174
1175         wpa_sm_set_rekey_offload(sm);
1176
1177         return;
1178
1179 failed:
1180         wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1181 }
1182
1183
1184 static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
1185                                              const u8 *keydata,
1186                                              size_t keydatalen,
1187                                              u16 key_info,
1188                                              struct wpa_gtk_data *gd)
1189 {
1190         int maxkeylen;
1191         struct wpa_eapol_ie_parse ie;
1192
1193         wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen);
1194         if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0)
1195                 return -1;
1196         if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1197                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1198                         "WPA: GTK IE in unencrypted key data");
1199                 return -1;
1200         }
1201         if (ie.gtk == NULL) {
1202                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1203                         "WPA: No GTK IE in Group Key msg 1/2");
1204                 return -1;
1205         }
1206         maxkeylen = gd->gtk_len = ie.gtk_len - 2;
1207
1208         if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1209                                               gd->gtk_len, maxkeylen,
1210                                               &gd->key_rsc_len, &gd->alg))
1211                 return -1;
1212
1213         wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake",
1214                     ie.gtk, ie.gtk_len);
1215         gd->keyidx = ie.gtk[0] & 0x3;
1216         gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
1217                                                       !!(ie.gtk[0] & BIT(2)));
1218         if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
1219                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1220                         "RSN: Too long GTK in GTK IE (len=%lu)",
1221                         (unsigned long) ie.gtk_len - 2);
1222                 return -1;
1223         }
1224         os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
1225
1226         if (ieee80211w_set_keys(sm, &ie) < 0)
1227                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1228                         "RSN: Failed to configure IGTK");
1229
1230         return 0;
1231 }
1232
1233
1234 static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
1235                                              const struct wpa_eapol_key *key,
1236                                              size_t keydatalen, int key_info,
1237                                              size_t extra_len, u16 ver,
1238                                              struct wpa_gtk_data *gd)
1239 {
1240         size_t maxkeylen;
1241         u8 ek[32];
1242
1243         gd->gtk_len = WPA_GET_BE16(key->key_length);
1244         maxkeylen = keydatalen;
1245         if (keydatalen > extra_len) {
1246                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1247                         "WPA: Truncated EAPOL-Key packet: "
1248                         "key_data_length=%lu > extra_len=%lu",
1249                         (unsigned long) keydatalen, (unsigned long) extra_len);
1250                 return -1;
1251         }
1252         if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1253                 if (maxkeylen < 8) {
1254                         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1255                                 "WPA: Too short maxkeylen (%lu)",
1256                                 (unsigned long) maxkeylen);
1257                         return -1;
1258                 }
1259                 maxkeylen -= 8;
1260         }
1261
1262         if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1263                                               gd->gtk_len, maxkeylen,
1264                                               &gd->key_rsc_len, &gd->alg))
1265                 return -1;
1266
1267         gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1268                 WPA_KEY_INFO_KEY_INDEX_SHIFT;
1269         if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1270                 os_memcpy(ek, key->key_iv, 16);
1271                 os_memcpy(ek + 16, sm->ptk.kek, 16);
1272                 if (keydatalen > sizeof(gd->gtk)) {
1273                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1274                                 "WPA: RC4 key data too long (%lu)",
1275                                 (unsigned long) keydatalen);
1276                         return -1;
1277                 }
1278                 os_memcpy(gd->gtk, key + 1, keydatalen);
1279                 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) {
1280                         wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1281                                 "WPA: RC4 failed");
1282                         return -1;
1283                 }
1284         } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1285                 if (keydatalen % 8) {
1286                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1287                                 "WPA: Unsupported AES-WRAP len %lu",
1288                                 (unsigned long) keydatalen);
1289                         return -1;
1290                 }
1291                 if (maxkeylen > sizeof(gd->gtk)) {
1292                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1293                                 "WPA: AES-WRAP key data "
1294                                 "too long (keydatalen=%lu maxkeylen=%lu)",
1295                                 (unsigned long) keydatalen,
1296                                 (unsigned long) maxkeylen);
1297                         return -1;
1298                 }
1299                 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8,
1300                                (const u8 *) (key + 1), gd->gtk)) {
1301                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1302                                 "WPA: AES unwrap failed - could not decrypt "
1303                                 "GTK");
1304                         return -1;
1305                 }
1306         } else {
1307                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1308                         "WPA: Unsupported key_info type %d", ver);
1309                 return -1;
1310         }
1311         gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
1312                 sm, !!(key_info & WPA_KEY_INFO_TXRX));
1313         return 0;
1314 }
1315
1316
1317 static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
1318                                       const struct wpa_eapol_key *key,
1319                                       int ver, u16 key_info)
1320 {
1321         size_t rlen;
1322         struct wpa_eapol_key *reply;
1323         u8 *rbuf;
1324
1325         rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1326                                   sizeof(*reply), &rlen, (void *) &reply);
1327         if (rbuf == NULL)
1328                 return -1;
1329
1330         reply->type = sm->proto == WPA_PROTO_RSN ?
1331                 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1332         key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
1333         key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE;
1334         WPA_PUT_BE16(reply->key_info, key_info);
1335         if (sm->proto == WPA_PROTO_RSN)
1336                 WPA_PUT_BE16(reply->key_length, 0);
1337         else
1338                 os_memcpy(reply->key_length, key->key_length, 2);
1339         os_memcpy(reply->replay_counter, key->replay_counter,
1340                   WPA_REPLAY_COUNTER_LEN);
1341
1342         WPA_PUT_BE16(reply->key_data_length, 0);
1343
1344         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
1345         wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL,
1346                            rbuf, rlen, reply->key_mic);
1347
1348         return 0;
1349 }
1350
1351
1352 static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
1353                                           const unsigned char *src_addr,
1354                                           const struct wpa_eapol_key *key,
1355                                           int extra_len, u16 ver)
1356 {
1357         u16 key_info, keydatalen;
1358         int rekey, ret;
1359         struct wpa_gtk_data gd;
1360
1361         os_memset(&gd, 0, sizeof(gd));
1362
1363         rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
1364         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key "
1365                 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
1366
1367         key_info = WPA_GET_BE16(key->key_info);
1368         keydatalen = WPA_GET_BE16(key->key_data_length);
1369
1370         if (sm->proto == WPA_PROTO_RSN) {
1371                 ret = wpa_supplicant_process_1_of_2_rsn(sm,
1372                                                         (const u8 *) (key + 1),
1373                                                         keydatalen, key_info,
1374                                                         &gd);
1375         } else {
1376                 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen,
1377                                                         key_info, extra_len,
1378                                                         ver, &gd);
1379         }
1380
1381         wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1382
1383         if (ret)
1384                 goto failed;
1385
1386         if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
1387             wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
1388                 goto failed;
1389
1390         if (rekey) {
1391                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
1392                         "completed with " MACSTR " [GTK=%s]",
1393                         MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
1394                 wpa_sm_cancel_auth_timeout(sm);
1395                 wpa_sm_set_state(sm, WPA_COMPLETED);
1396
1397                 wpa_sm_set_rekey_offload(sm);
1398         } else {
1399                 wpa_supplicant_key_neg_complete(sm, sm->bssid,
1400                                                 key_info &
1401                                                 WPA_KEY_INFO_SECURE);
1402         }
1403         return;
1404
1405 failed:
1406         wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1407 }
1408
1409
1410 static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
1411                                                struct wpa_eapol_key *key,
1412                                                u16 ver,
1413                                                const u8 *buf, size_t len)
1414 {
1415         u8 mic[16];
1416         int ok = 0;
1417
1418         os_memcpy(mic, key->key_mic, 16);
1419         if (sm->tptk_set) {
1420                 os_memset(key->key_mic, 0, 16);
1421                 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len,
1422                                   key->key_mic);
1423                 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1424                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1425                                 "WPA: Invalid EAPOL-Key MIC "
1426                                 "when using TPTK - ignoring TPTK");
1427                 } else {
1428                         ok = 1;
1429                         sm->tptk_set = 0;
1430                         sm->ptk_set = 1;
1431                         os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
1432                 }
1433         }
1434
1435         if (!ok && sm->ptk_set) {
1436                 os_memset(key->key_mic, 0, 16);
1437                 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len,
1438                                   key->key_mic);
1439                 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1440                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1441                                 "WPA: Invalid EAPOL-Key MIC - "
1442                                 "dropping packet");
1443                         return -1;
1444                 }
1445                 ok = 1;
1446         }
1447
1448         if (!ok) {
1449                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1450                         "WPA: Could not verify EAPOL-Key MIC - "
1451                         "dropping packet");
1452                 return -1;
1453         }
1454
1455         os_memcpy(sm->rx_replay_counter, key->replay_counter,
1456                   WPA_REPLAY_COUNTER_LEN);
1457         sm->rx_replay_counter_set = 1;
1458         return 0;
1459 }
1460
1461
1462 /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */
1463 static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm,
1464                                            struct wpa_eapol_key *key, u16 ver)
1465 {
1466         u16 keydatalen = WPA_GET_BE16(key->key_data_length);
1467
1468         wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
1469                     (u8 *) (key + 1), keydatalen);
1470         if (!sm->ptk_set) {
1471                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1472                         "WPA: PTK not available, cannot decrypt EAPOL-Key Key "
1473                         "Data");
1474                 return -1;
1475         }
1476
1477         /* Decrypt key data here so that this operation does not need
1478          * to be implemented separately for each message type. */
1479         if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1480                 u8 ek[32];
1481                 os_memcpy(ek, key->key_iv, 16);
1482                 os_memcpy(ek + 16, sm->ptk.kek, 16);
1483                 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) {
1484                         wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1485                                 "WPA: RC4 failed");
1486                         return -1;
1487                 }
1488         } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1489                    ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1490                 u8 *buf;
1491                 if (keydatalen % 8) {
1492                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1493                                 "WPA: Unsupported AES-WRAP len %d",
1494                                 keydatalen);
1495                         return -1;
1496                 }
1497                 keydatalen -= 8; /* AES-WRAP adds 8 bytes */
1498                 buf = os_malloc(keydatalen);
1499                 if (buf == NULL) {
1500                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1501                                 "WPA: No memory for AES-UNWRAP buffer");
1502                         return -1;
1503                 }
1504                 if (aes_unwrap(sm->ptk.kek, keydatalen / 8,
1505                                (u8 *) (key + 1), buf)) {
1506                         os_free(buf);
1507                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1508                                 "WPA: AES unwrap failed - "
1509                                 "could not decrypt EAPOL-Key key data");
1510                         return -1;
1511                 }
1512                 os_memcpy(key + 1, buf, keydatalen);
1513                 os_free(buf);
1514                 WPA_PUT_BE16(key->key_data_length, keydatalen);
1515         } else {
1516                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1517                         "WPA: Unsupported key_info type %d", ver);
1518                 return -1;
1519         }
1520         wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
1521                         (u8 *) (key + 1), keydatalen);
1522         return 0;
1523 }
1524
1525
1526 /**
1527  * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted
1528  * @sm: Pointer to WPA state machine data from wpa_sm_init()
1529  */
1530 void wpa_sm_aborted_cached(struct wpa_sm *sm)
1531 {
1532         if (sm && sm->cur_pmksa) {
1533                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1534                         "RSN: Cancelling PMKSA caching attempt");
1535                 sm->cur_pmksa = NULL;
1536         }
1537 }
1538
1539
1540 static void wpa_eapol_key_dump(struct wpa_sm *sm,
1541                                const struct wpa_eapol_key *key)
1542 {
1543 #ifndef CONFIG_NO_STDOUT_DEBUG
1544         u16 key_info = WPA_GET_BE16(key->key_info);
1545
1546         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "  EAPOL-Key type=%d", key->type);
1547         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1548                 "  key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)",
1549                 key_info, key_info & WPA_KEY_INFO_TYPE_MASK,
1550                 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1551                 WPA_KEY_INFO_KEY_INDEX_SHIFT,
1552                 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13,
1553                 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
1554                 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
1555                 key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
1556                 key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
1557                 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
1558                 key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
1559                 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
1560                 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
1561         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1562                 "  key_length=%u key_data_length=%u",
1563                 WPA_GET_BE16(key->key_length),
1564                 WPA_GET_BE16(key->key_data_length));
1565         wpa_hexdump(MSG_DEBUG, "  replay_counter",
1566                     key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1567         wpa_hexdump(MSG_DEBUG, "  key_nonce", key->key_nonce, WPA_NONCE_LEN);
1568         wpa_hexdump(MSG_DEBUG, "  key_iv", key->key_iv, 16);
1569         wpa_hexdump(MSG_DEBUG, "  key_rsc", key->key_rsc, 8);
1570         wpa_hexdump(MSG_DEBUG, "  key_id (reserved)", key->key_id, 8);
1571         wpa_hexdump(MSG_DEBUG, "  key_mic", key->key_mic, 16);
1572 #endif /* CONFIG_NO_STDOUT_DEBUG */
1573 }
1574
1575
1576 /**
1577  * wpa_sm_rx_eapol - Process received WPA EAPOL frames
1578  * @sm: Pointer to WPA state machine data from wpa_sm_init()
1579  * @src_addr: Source MAC address of the EAPOL packet
1580  * @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
1581  * @len: Length of the EAPOL frame
1582  * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
1583  *
1584  * This function is called for each received EAPOL frame. Other than EAPOL-Key
1585  * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
1586  * only processing WPA and WPA2 EAPOL-Key frames.
1587  *
1588  * The received EAPOL-Key packets are validated and valid packets are replied
1589  * to. In addition, key material (PTK, GTK) is configured at the end of a
1590  * successful key handshake.
1591  */
1592 int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
1593                     const u8 *buf, size_t len)
1594 {
1595         size_t plen, data_len, extra_len;
1596         struct ieee802_1x_hdr *hdr;
1597         struct wpa_eapol_key *key;
1598         u16 key_info, ver;
1599         u8 *tmp;
1600         int ret = -1;
1601         struct wpa_peerkey *peerkey = NULL;
1602
1603 #ifdef CONFIG_IEEE80211R
1604         sm->ft_completed = 0;
1605 #endif /* CONFIG_IEEE80211R */
1606
1607         if (len < sizeof(*hdr) + sizeof(*key)) {
1608                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1609                         "WPA: EAPOL frame too short to be a WPA "
1610                         "EAPOL-Key (len %lu, expecting at least %lu)",
1611                         (unsigned long) len,
1612                         (unsigned long) sizeof(*hdr) + sizeof(*key));
1613                 return 0;
1614         }
1615
1616         tmp = os_malloc(len);
1617         if (tmp == NULL)
1618                 return -1;
1619         os_memcpy(tmp, buf, len);
1620
1621         hdr = (struct ieee802_1x_hdr *) tmp;
1622         key = (struct wpa_eapol_key *) (hdr + 1);
1623         plen = be_to_host16(hdr->length);
1624         data_len = plen + sizeof(*hdr);
1625         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1626                 "IEEE 802.1X RX: version=%d type=%d length=%lu",
1627                 hdr->version, hdr->type, (unsigned long) plen);
1628
1629         if (hdr->version < EAPOL_VERSION) {
1630                 /* TODO: backwards compatibility */
1631         }
1632         if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
1633                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1634                         "WPA: EAPOL frame (type %u) discarded, "
1635                         "not a Key frame", hdr->type);
1636                 ret = 0;
1637                 goto out;
1638         }
1639         if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
1640                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1641                         "WPA: EAPOL frame payload size %lu "
1642                         "invalid (frame size %lu)",
1643                         (unsigned long) plen, (unsigned long) len);
1644                 ret = 0;
1645                 goto out;
1646         }
1647
1648         if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN)
1649         {
1650                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1651                         "WPA: EAPOL-Key type (%d) unknown, discarded",
1652                         key->type);
1653                 ret = 0;
1654                 goto out;
1655         }
1656         wpa_eapol_key_dump(sm, key);
1657
1658         eapol_sm_notify_lower_layer_success(sm->eapol, 0);
1659         wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len);
1660         if (data_len < len) {
1661                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1662                         "WPA: ignoring %lu bytes after the IEEE 802.1X data",
1663                         (unsigned long) len - data_len);
1664         }
1665         key_info = WPA_GET_BE16(key->key_info);
1666         ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1667         if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
1668 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
1669             ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
1670 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
1671             ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1672                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1673                         "WPA: Unsupported EAPOL-Key descriptor version %d",
1674                         ver);
1675                 goto out;
1676         }
1677
1678 #ifdef CONFIG_IEEE80211R
1679         if (wpa_key_mgmt_ft(sm->key_mgmt)) {
1680                 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */
1681                 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1682                         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1683                                 "FT: AP did not use AES-128-CMAC");
1684                         goto out;
1685                 }
1686         } else
1687 #endif /* CONFIG_IEEE80211R */
1688 #ifdef CONFIG_IEEE80211W
1689         if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
1690                 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1691                         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1692                                 "WPA: AP did not use the "
1693                                 "negotiated AES-128-CMAC");
1694                         goto out;
1695                 }
1696         } else
1697 #endif /* CONFIG_IEEE80211W */
1698         if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
1699             ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1700                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1701                         "WPA: CCMP is used, but EAPOL-Key "
1702                         "descriptor version (%d) is not 2", ver);
1703                 if (sm->group_cipher != WPA_CIPHER_CCMP &&
1704                     !(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1705                         /* Earlier versions of IEEE 802.11i did not explicitly
1706                          * require version 2 descriptor for all EAPOL-Key
1707                          * packets, so allow group keys to use version 1 if
1708                          * CCMP is not used for them. */
1709                         wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1710                                 "WPA: Backwards compatibility: allow invalid "
1711                                 "version for non-CCMP group keys");
1712                 } else
1713                         goto out;
1714         }
1715
1716 #ifdef CONFIG_PEERKEY
1717         for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) {
1718                 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0)
1719                         break;
1720         }
1721
1722         if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) {
1723                 if (!peerkey->initiator && peerkey->replay_counter_set &&
1724                     os_memcmp(key->replay_counter, peerkey->replay_counter,
1725                               WPA_REPLAY_COUNTER_LEN) <= 0) {
1726                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1727                                 "RSN: EAPOL-Key Replay Counter did not "
1728                                 "increase (STK) - dropping packet");
1729                         goto out;
1730                 } else if (peerkey->initiator) {
1731                         u8 _tmp[WPA_REPLAY_COUNTER_LEN];
1732                         os_memcpy(_tmp, key->replay_counter,
1733                                   WPA_REPLAY_COUNTER_LEN);
1734                         inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN);
1735                         if (os_memcmp(_tmp, peerkey->replay_counter,
1736                                       WPA_REPLAY_COUNTER_LEN) != 0) {
1737                                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1738                                         "RSN: EAPOL-Key Replay "
1739                                         "Counter did not match (STK) - "
1740                                         "dropping packet");
1741                                 goto out;
1742                         }
1743                 }
1744         }
1745
1746         if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) {
1747                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1748                         "RSN: Ack bit in key_info from STK peer");
1749                 goto out;
1750         }
1751 #endif /* CONFIG_PEERKEY */
1752
1753         if (!peerkey && sm->rx_replay_counter_set &&
1754             os_memcmp(key->replay_counter, sm->rx_replay_counter,
1755                       WPA_REPLAY_COUNTER_LEN) <= 0) {
1756                 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1757                         "WPA: EAPOL-Key Replay Counter did not increase - "
1758                         "dropping packet");
1759                 goto out;
1760         }
1761
1762         if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE))
1763 #ifdef CONFIG_PEERKEY
1764             && (peerkey == NULL || !peerkey->initiator)
1765 #endif /* CONFIG_PEERKEY */
1766                 ) {
1767                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1768                         "WPA: No Ack bit in key_info");
1769                 goto out;
1770         }
1771
1772         if (key_info & WPA_KEY_INFO_REQUEST) {
1773                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1774                         "WPA: EAPOL-Key with Request bit - dropped");
1775                 goto out;
1776         }
1777
1778         if ((key_info & WPA_KEY_INFO_MIC) && !peerkey &&
1779             wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
1780                 goto out;
1781
1782 #ifdef CONFIG_PEERKEY
1783         if ((key_info & WPA_KEY_INFO_MIC) && peerkey &&
1784             peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len))
1785                 goto out;
1786 #endif /* CONFIG_PEERKEY */
1787
1788         extra_len = data_len - sizeof(*hdr) - sizeof(*key);
1789
1790         if (WPA_GET_BE16(key->key_data_length) > extra_len) {
1791                 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
1792                         "frame - key_data overflow (%d > %lu)",
1793                         WPA_GET_BE16(key->key_data_length),
1794                         (unsigned long) extra_len);
1795                 goto out;
1796         }
1797         extra_len = WPA_GET_BE16(key->key_data_length);
1798
1799         if (sm->proto == WPA_PROTO_RSN &&
1800             (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1801                 if (wpa_supplicant_decrypt_key_data(sm, key, ver))
1802                         goto out;
1803                 extra_len = WPA_GET_BE16(key->key_data_length);
1804         }
1805
1806         if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1807                 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
1808                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1809                                 "WPA: Ignored EAPOL-Key (Pairwise) with "
1810                                 "non-zero key index");
1811                         goto out;
1812                 }
1813                 if (peerkey) {
1814                         /* PeerKey 4-Way Handshake */
1815                         peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver);
1816                 } else if (key_info & WPA_KEY_INFO_MIC) {
1817                         /* 3/4 4-Way Handshake */
1818                         wpa_supplicant_process_3_of_4(sm, key, ver);
1819                 } else {
1820                         /* 1/4 4-Way Handshake */
1821                         wpa_supplicant_process_1_of_4(sm, src_addr, key,
1822                                                       ver);
1823                 }
1824         } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1825                 /* PeerKey SMK Handshake */
1826                 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info,
1827                                      ver);
1828         } else {
1829                 if (key_info & WPA_KEY_INFO_MIC) {
1830                         /* 1/2 Group Key Handshake */
1831                         wpa_supplicant_process_1_of_2(sm, src_addr, key,
1832                                                       extra_len, ver);
1833                 } else {
1834                         wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1835                                 "WPA: EAPOL-Key (Group) without Mic bit - "
1836                                 "dropped");
1837                 }
1838         }
1839
1840         ret = 1;
1841
1842 out:
1843         os_free(tmp);
1844         return ret;
1845 }
1846
1847
1848 #ifdef CONFIG_CTRL_IFACE
1849 static int wpa_cipher_bits(int cipher)
1850 {
1851         switch (cipher) {
1852         case WPA_CIPHER_CCMP:
1853                 return 128;
1854         case WPA_CIPHER_TKIP:
1855                 return 256;
1856         case WPA_CIPHER_WEP104:
1857                 return 104;
1858         case WPA_CIPHER_WEP40:
1859                 return 40;
1860         default:
1861                 return 0;
1862         }
1863 }
1864
1865
1866 static u32 wpa_key_mgmt_suite(struct wpa_sm *sm)
1867 {
1868         switch (sm->key_mgmt) {
1869         case WPA_KEY_MGMT_IEEE8021X:
1870                 return (sm->proto == WPA_PROTO_RSN ?
1871                         RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
1872                         WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
1873         case WPA_KEY_MGMT_PSK:
1874                 return (sm->proto == WPA_PROTO_RSN ?
1875                         RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
1876                         WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
1877 #ifdef CONFIG_IEEE80211R
1878         case WPA_KEY_MGMT_FT_IEEE8021X:
1879                 return RSN_AUTH_KEY_MGMT_FT_802_1X;
1880         case WPA_KEY_MGMT_FT_PSK:
1881                 return RSN_AUTH_KEY_MGMT_FT_PSK;
1882 #endif /* CONFIG_IEEE80211R */
1883 #ifdef CONFIG_IEEE80211W
1884         case WPA_KEY_MGMT_IEEE8021X_SHA256:
1885                 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
1886         case WPA_KEY_MGMT_PSK_SHA256:
1887                 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
1888 #endif /* CONFIG_IEEE80211W */
1889         case WPA_KEY_MGMT_WPA_NONE:
1890                 return WPA_AUTH_KEY_MGMT_NONE;
1891         default:
1892                 return 0;
1893         }
1894 }
1895
1896
1897 static u32 wpa_cipher_suite(struct wpa_sm *sm, int cipher)
1898 {
1899         switch (cipher) {
1900         case WPA_CIPHER_CCMP:
1901                 return (sm->proto == WPA_PROTO_RSN ?
1902                         RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1903         case WPA_CIPHER_TKIP:
1904                 return (sm->proto == WPA_PROTO_RSN ?
1905                         RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1906         case WPA_CIPHER_WEP104:
1907                 return (sm->proto == WPA_PROTO_RSN ?
1908                         RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1909         case WPA_CIPHER_WEP40:
1910                 return (sm->proto == WPA_PROTO_RSN ?
1911                         RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1912         case WPA_CIPHER_NONE:
1913                 return (sm->proto == WPA_PROTO_RSN ?
1914                         RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1915         default:
1916                 return 0;
1917         }
1918 }
1919
1920
1921 #define RSN_SUITE "%02x-%02x-%02x-%d"
1922 #define RSN_SUITE_ARG(s) \
1923 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
1924
1925 /**
1926  * wpa_sm_get_mib - Dump text list of MIB entries
1927  * @sm: Pointer to WPA state machine data from wpa_sm_init()
1928  * @buf: Buffer for the list
1929  * @buflen: Length of the buffer
1930  * Returns: Number of bytes written to buffer
1931  *
1932  * This function is used fetch dot11 MIB variables.
1933  */
1934 int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
1935 {
1936         char pmkid_txt[PMKID_LEN * 2 + 1];
1937         int rsna, ret;
1938         size_t len;
1939
1940         if (sm->cur_pmksa) {
1941                 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
1942                                  sm->cur_pmksa->pmkid, PMKID_LEN);
1943         } else
1944                 pmkid_txt[0] = '\0';
1945
1946         if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
1947              wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) &&
1948             sm->proto == WPA_PROTO_RSN)
1949                 rsna = 1;
1950         else
1951                 rsna = 0;
1952
1953         ret = os_snprintf(buf, buflen,
1954                           "dot11RSNAOptionImplemented=TRUE\n"
1955                           "dot11RSNAPreauthenticationImplemented=TRUE\n"
1956                           "dot11RSNAEnabled=%s\n"
1957                           "dot11RSNAPreauthenticationEnabled=%s\n"
1958                           "dot11RSNAConfigVersion=%d\n"
1959                           "dot11RSNAConfigPairwiseKeysSupported=5\n"
1960                           "dot11RSNAConfigGroupCipherSize=%d\n"
1961                           "dot11RSNAConfigPMKLifetime=%d\n"
1962                           "dot11RSNAConfigPMKReauthThreshold=%d\n"
1963                           "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
1964                           "dot11RSNAConfigSATimeout=%d\n",
1965                           rsna ? "TRUE" : "FALSE",
1966                           rsna ? "TRUE" : "FALSE",
1967                           RSN_VERSION,
1968                           wpa_cipher_bits(sm->group_cipher),
1969                           sm->dot11RSNAConfigPMKLifetime,
1970                           sm->dot11RSNAConfigPMKReauthThreshold,
1971                           sm->dot11RSNAConfigSATimeout);
1972         if (ret < 0 || (size_t) ret >= buflen)
1973                 return 0;
1974         len = ret;
1975
1976         ret = os_snprintf(
1977                 buf + len, buflen - len,
1978                 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
1979                 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
1980                 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
1981                 "dot11RSNAPMKIDUsed=%s\n"
1982                 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
1983                 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
1984                 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
1985                 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
1986                 "dot11RSNA4WayHandshakeFailures=%u\n",
1987                 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1988                 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1989                 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1990                 pmkid_txt,
1991                 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1992                 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1993                 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1994                 sm->dot11RSNA4WayHandshakeFailures);
1995         if (ret >= 0 && (size_t) ret < buflen)
1996                 len += ret;
1997
1998         return (int) len;
1999 }
2000 #endif /* CONFIG_CTRL_IFACE */
2001
2002
2003 static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
2004                                  void *ctx, int replace)
2005 {
2006         struct wpa_sm *sm = ctx;
2007
2008         if (sm->cur_pmksa == entry ||
2009             (sm->pmk_len == entry->pmk_len &&
2010              os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
2011                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2012                         "RSN: removed current PMKSA entry");
2013                 sm->cur_pmksa = NULL;
2014
2015                 if (replace) {
2016                         /* A new entry is being added, so no need to
2017                          * deauthenticate in this case. This happens when EAP
2018                          * authentication is completed again (reauth or failed
2019                          * PMKSA caching attempt). */
2020                         return;
2021                 }
2022
2023                 os_memset(sm->pmk, 0, sizeof(sm->pmk));
2024                 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
2025         }
2026 }
2027
2028
2029 /**
2030  * wpa_sm_init - Initialize WPA state machine
2031  * @ctx: Context pointer for callbacks; this needs to be an allocated buffer
2032  * Returns: Pointer to the allocated WPA state machine data
2033  *
2034  * This function is used to allocate a new WPA state machine and the returned
2035  * value is passed to all WPA state machine calls.
2036  */
2037 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
2038 {
2039         struct wpa_sm *sm;
2040
2041         sm = os_zalloc(sizeof(*sm));
2042         if (sm == NULL)
2043                 return NULL;
2044         dl_list_init(&sm->pmksa_candidates);
2045         sm->renew_snonce = 1;
2046         sm->ctx = ctx;
2047
2048         sm->dot11RSNAConfigPMKLifetime = 43200;
2049         sm->dot11RSNAConfigPMKReauthThreshold = 70;
2050         sm->dot11RSNAConfigSATimeout = 60;
2051
2052         sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
2053         if (sm->pmksa == NULL) {
2054                 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
2055                         "RSN: PMKSA cache initialization failed");
2056                 os_free(sm);
2057                 return NULL;
2058         }
2059
2060         return sm;
2061 }
2062
2063
2064 /**
2065  * wpa_sm_deinit - Deinitialize WPA state machine
2066  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2067  */
2068 void wpa_sm_deinit(struct wpa_sm *sm)
2069 {
2070         if (sm == NULL)
2071                 return;
2072         pmksa_cache_deinit(sm->pmksa);
2073         eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
2074         eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
2075         os_free(sm->assoc_wpa_ie);
2076         os_free(sm->ap_wpa_ie);
2077         os_free(sm->ap_rsn_ie);
2078         os_free(sm->ctx);
2079         peerkey_deinit(sm);
2080 #ifdef CONFIG_IEEE80211R
2081         os_free(sm->assoc_resp_ies);
2082 #endif /* CONFIG_IEEE80211R */
2083         os_free(sm);
2084 }
2085
2086
2087 /**
2088  * wpa_sm_notify_assoc - Notify WPA state machine about association
2089  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2090  * @bssid: The BSSID of the new association
2091  *
2092  * This function is called to let WPA state machine know that the connection
2093  * was established.
2094  */
2095 void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
2096 {
2097         int clear_ptk = 1;
2098
2099         if (sm == NULL)
2100                 return;
2101
2102         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2103                 "WPA: Association event - clear replay counter");
2104         os_memcpy(sm->bssid, bssid, ETH_ALEN);
2105         os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
2106         sm->rx_replay_counter_set = 0;
2107         sm->renew_snonce = 1;
2108         if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
2109                 rsn_preauth_deinit(sm);
2110
2111 #ifdef CONFIG_IEEE80211R
2112         if (wpa_ft_is_completed(sm)) {
2113                 /*
2114                  * Clear portValid to kick EAPOL state machine to re-enter
2115                  * AUTHENTICATED state to get the EAPOL port Authorized.
2116                  */
2117                 eapol_sm_notify_portValid(sm->eapol, FALSE);
2118                 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
2119
2120                 /* Prepare for the next transition */
2121                 wpa_ft_prepare_auth_request(sm, NULL);
2122
2123                 clear_ptk = 0;
2124         }
2125 #endif /* CONFIG_IEEE80211R */
2126
2127         if (clear_ptk) {
2128                 /*
2129                  * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
2130                  * this is not part of a Fast BSS Transition.
2131                  */
2132                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK");
2133                 sm->ptk_set = 0;
2134                 sm->tptk_set = 0;
2135         }
2136
2137 #ifdef CONFIG_TDLS
2138         wpa_tdls_assoc(sm);
2139 #endif /* CONFIG_TDLS */
2140 }
2141
2142
2143 /**
2144  * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
2145  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2146  *
2147  * This function is called to let WPA state machine know that the connection
2148  * was lost. This will abort any existing pre-authentication session.
2149  */
2150 void wpa_sm_notify_disassoc(struct wpa_sm *sm)
2151 {
2152         rsn_preauth_deinit(sm);
2153         if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
2154                 sm->dot11RSNA4WayHandshakeFailures++;
2155 #ifdef CONFIG_TDLS
2156         wpa_tdls_disassoc(sm);
2157 #endif /* CONFIG_TDLS */
2158 }
2159
2160
2161 /**
2162  * wpa_sm_set_pmk - Set PMK
2163  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2164  * @pmk: The new PMK
2165  * @pmk_len: The length of the new PMK in bytes
2166  *
2167  * Configure the PMK for WPA state machine.
2168  */
2169 void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len)
2170 {
2171         if (sm == NULL)
2172                 return;
2173
2174         sm->pmk_len = pmk_len;
2175         os_memcpy(sm->pmk, pmk, pmk_len);
2176
2177 #ifdef CONFIG_IEEE80211R
2178         /* Set XXKey to be PSK for FT key derivation */
2179         sm->xxkey_len = pmk_len;
2180         os_memcpy(sm->xxkey, pmk, pmk_len);
2181 #endif /* CONFIG_IEEE80211R */
2182 }
2183
2184
2185 /**
2186  * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
2187  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2188  *
2189  * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
2190  * will be cleared.
2191  */
2192 void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
2193 {
2194         if (sm == NULL)
2195                 return;
2196
2197         if (sm->cur_pmksa) {
2198                 sm->pmk_len = sm->cur_pmksa->pmk_len;
2199                 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
2200         } else {
2201                 sm->pmk_len = PMK_LEN;
2202                 os_memset(sm->pmk, 0, PMK_LEN);
2203         }
2204 }
2205
2206
2207 /**
2208  * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled
2209  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2210  * @fast_reauth: Whether fast reauthentication (EAP) is allowed
2211  */
2212 void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
2213 {
2214         if (sm)
2215                 sm->fast_reauth = fast_reauth;
2216 }
2217
2218
2219 /**
2220  * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks
2221  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2222  * @scard_ctx: Context pointer for smartcard related callback functions
2223  */
2224 void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
2225 {
2226         if (sm == NULL)
2227                 return;
2228         sm->scard_ctx = scard_ctx;
2229         if (sm->preauth_eapol)
2230                 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
2231 }
2232
2233
2234 /**
2235  * wpa_sm_set_config - Notification of current configration change
2236  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2237  * @config: Pointer to current network configuration
2238  *
2239  * Notify WPA state machine that configuration has changed. config will be
2240  * stored as a backpointer to network configuration. This can be %NULL to clear
2241  * the stored pointed.
2242  */
2243 void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
2244 {
2245         if (!sm)
2246                 return;
2247
2248         if (config) {
2249                 sm->network_ctx = config->network_ctx;
2250                 sm->peerkey_enabled = config->peerkey_enabled;
2251                 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher;
2252                 sm->proactive_key_caching = config->proactive_key_caching;
2253                 sm->eap_workaround = config->eap_workaround;
2254                 sm->eap_conf_ctx = config->eap_conf_ctx;
2255                 if (config->ssid) {
2256                         os_memcpy(sm->ssid, config->ssid, config->ssid_len);
2257                         sm->ssid_len = config->ssid_len;
2258                 } else
2259                         sm->ssid_len = 0;
2260                 sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
2261         } else {
2262                 sm->network_ctx = NULL;
2263                 sm->peerkey_enabled = 0;
2264                 sm->allowed_pairwise_cipher = 0;
2265                 sm->proactive_key_caching = 0;
2266                 sm->eap_workaround = 0;
2267                 sm->eap_conf_ctx = NULL;
2268                 sm->ssid_len = 0;
2269                 sm->wpa_ptk_rekey = 0;
2270         }
2271 }
2272
2273
2274 /**
2275  * wpa_sm_set_own_addr - Set own MAC address
2276  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2277  * @addr: Own MAC address
2278  */
2279 void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
2280 {
2281         if (sm)
2282                 os_memcpy(sm->own_addr, addr, ETH_ALEN);
2283 }
2284
2285
2286 /**
2287  * wpa_sm_set_ifname - Set network interface name
2288  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2289  * @ifname: Interface name
2290  * @bridge_ifname: Optional bridge interface name (for pre-auth)
2291  */
2292 void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
2293                        const char *bridge_ifname)
2294 {
2295         if (sm) {
2296                 sm->ifname = ifname;
2297                 sm->bridge_ifname = bridge_ifname;
2298         }
2299 }
2300
2301
2302 /**
2303  * wpa_sm_set_eapol - Set EAPOL state machine pointer
2304  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2305  * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init()
2306  */
2307 void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
2308 {
2309         if (sm)
2310                 sm->eapol = eapol;
2311 }
2312
2313
2314 /**
2315  * wpa_sm_set_param - Set WPA state machine parameters
2316  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2317  * @param: Parameter field
2318  * @value: Parameter value
2319  * Returns: 0 on success, -1 on failure
2320  */
2321 int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
2322                      unsigned int value)
2323 {
2324         int ret = 0;
2325
2326         if (sm == NULL)
2327                 return -1;
2328
2329         switch (param) {
2330         case RSNA_PMK_LIFETIME:
2331                 if (value > 0)
2332                         sm->dot11RSNAConfigPMKLifetime = value;
2333                 else
2334                         ret = -1;
2335                 break;
2336         case RSNA_PMK_REAUTH_THRESHOLD:
2337                 if (value > 0 && value <= 100)
2338                         sm->dot11RSNAConfigPMKReauthThreshold = value;
2339                 else
2340                         ret = -1;
2341                 break;
2342         case RSNA_SA_TIMEOUT:
2343                 if (value > 0)
2344                         sm->dot11RSNAConfigSATimeout = value;
2345                 else
2346                         ret = -1;
2347                 break;
2348         case WPA_PARAM_PROTO:
2349                 sm->proto = value;
2350                 break;
2351         case WPA_PARAM_PAIRWISE:
2352                 sm->pairwise_cipher = value;
2353                 break;
2354         case WPA_PARAM_GROUP:
2355                 sm->group_cipher = value;
2356                 break;
2357         case WPA_PARAM_KEY_MGMT:
2358                 sm->key_mgmt = value;
2359                 break;
2360 #ifdef CONFIG_IEEE80211W
2361         case WPA_PARAM_MGMT_GROUP:
2362                 sm->mgmt_group_cipher = value;
2363                 break;
2364 #endif /* CONFIG_IEEE80211W */
2365         case WPA_PARAM_RSN_ENABLED:
2366                 sm->rsn_enabled = value;
2367                 break;
2368         case WPA_PARAM_MFP:
2369                 sm->mfp = value;
2370                 break;
2371         default:
2372                 break;
2373         }
2374
2375         return ret;
2376 }
2377
2378
2379 /**
2380  * wpa_sm_get_param - Get WPA state machine parameters
2381  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2382  * @param: Parameter field
2383  * Returns: Parameter value
2384  */
2385 unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param)
2386 {
2387         if (sm == NULL)
2388                 return 0;
2389
2390         switch (param) {
2391         case RSNA_PMK_LIFETIME:
2392                 return sm->dot11RSNAConfigPMKLifetime;
2393         case RSNA_PMK_REAUTH_THRESHOLD:
2394                 return sm->dot11RSNAConfigPMKReauthThreshold;
2395         case RSNA_SA_TIMEOUT:
2396                 return sm->dot11RSNAConfigSATimeout;
2397         case WPA_PARAM_PROTO:
2398                 return sm->proto;
2399         case WPA_PARAM_PAIRWISE:
2400                 return sm->pairwise_cipher;
2401         case WPA_PARAM_GROUP:
2402                 return sm->group_cipher;
2403         case WPA_PARAM_KEY_MGMT:
2404                 return sm->key_mgmt;
2405 #ifdef CONFIG_IEEE80211W
2406         case WPA_PARAM_MGMT_GROUP:
2407                 return sm->mgmt_group_cipher;
2408 #endif /* CONFIG_IEEE80211W */
2409         case WPA_PARAM_RSN_ENABLED:
2410                 return sm->rsn_enabled;
2411         default:
2412                 return 0;
2413         }
2414 }
2415
2416
2417 /**
2418  * wpa_sm_get_status - Get WPA state machine
2419  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2420  * @buf: Buffer for status information
2421  * @buflen: Maximum buffer length
2422  * @verbose: Whether to include verbose status information
2423  * Returns: Number of bytes written to buf.
2424  *
2425  * Query WPA state machine for status information. This function fills in
2426  * a text area with current status information. If the buffer (buf) is not
2427  * large enough, status information will be truncated to fit the buffer.
2428  */
2429 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
2430                       int verbose)
2431 {
2432         char *pos = buf, *end = buf + buflen;
2433         int ret;
2434
2435         ret = os_snprintf(pos, end - pos,
2436                           "pairwise_cipher=%s\n"
2437                           "group_cipher=%s\n"
2438                           "key_mgmt=%s\n",
2439                           wpa_cipher_txt(sm->pairwise_cipher),
2440                           wpa_cipher_txt(sm->group_cipher),
2441                           wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
2442         if (ret < 0 || ret >= end - pos)
2443                 return pos - buf;
2444         pos += ret;
2445         return pos - buf;
2446 }
2447
2448
2449 /**
2450  * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
2451  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2452  * @wpa_ie: Pointer to buffer for WPA/RSN IE
2453  * @wpa_ie_len: Pointer to the length of the wpa_ie buffer
2454  * Returns: 0 on success, -1 on failure
2455  */
2456 int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
2457                                     size_t *wpa_ie_len)
2458 {
2459         int res;
2460
2461         if (sm == NULL)
2462                 return -1;
2463
2464         res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
2465         if (res < 0)
2466                 return -1;
2467         *wpa_ie_len = res;
2468
2469         wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
2470                     wpa_ie, *wpa_ie_len);
2471
2472         if (sm->assoc_wpa_ie == NULL) {
2473                 /*
2474                  * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
2475                  * the correct version of the IE even if PMKSA caching is
2476                  * aborted (which would remove PMKID from IE generation).
2477                  */
2478                 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len);
2479                 if (sm->assoc_wpa_ie == NULL)
2480                         return -1;
2481
2482                 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len);
2483                 sm->assoc_wpa_ie_len = *wpa_ie_len;
2484         }
2485
2486         return 0;
2487 }
2488
2489
2490 /**
2491  * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq
2492  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2493  * @ie: Pointer to IE data (starting from id)
2494  * @len: IE length
2495  * Returns: 0 on success, -1 on failure
2496  *
2497  * Inform WPA state machine about the WPA/RSN IE used in (Re)Association
2498  * Request frame. The IE will be used to override the default value generated
2499  * with wpa_sm_set_assoc_wpa_ie_default().
2500  */
2501 int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2502 {
2503         if (sm == NULL)
2504                 return -1;
2505
2506         os_free(sm->assoc_wpa_ie);
2507         if (ie == NULL || len == 0) {
2508                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2509                         "WPA: clearing own WPA/RSN IE");
2510                 sm->assoc_wpa_ie = NULL;
2511                 sm->assoc_wpa_ie_len = 0;
2512         } else {
2513                 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
2514                 sm->assoc_wpa_ie = os_malloc(len);
2515                 if (sm->assoc_wpa_ie == NULL)
2516                         return -1;
2517
2518                 os_memcpy(sm->assoc_wpa_ie, ie, len);
2519                 sm->assoc_wpa_ie_len = len;
2520         }
2521
2522         return 0;
2523 }
2524
2525
2526 /**
2527  * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp
2528  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2529  * @ie: Pointer to IE data (starting from id)
2530  * @len: IE length
2531  * Returns: 0 on success, -1 on failure
2532  *
2533  * Inform WPA state machine about the WPA IE used in Beacon / Probe Response
2534  * frame.
2535  */
2536 int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2537 {
2538         if (sm == NULL)
2539                 return -1;
2540
2541         os_free(sm->ap_wpa_ie);
2542         if (ie == NULL || len == 0) {
2543                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2544                         "WPA: clearing AP WPA IE");
2545                 sm->ap_wpa_ie = NULL;
2546                 sm->ap_wpa_ie_len = 0;
2547         } else {
2548                 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
2549                 sm->ap_wpa_ie = os_malloc(len);
2550                 if (sm->ap_wpa_ie == NULL)
2551                         return -1;
2552
2553                 os_memcpy(sm->ap_wpa_ie, ie, len);
2554                 sm->ap_wpa_ie_len = len;
2555         }
2556
2557         return 0;
2558 }
2559
2560
2561 /**
2562  * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp
2563  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2564  * @ie: Pointer to IE data (starting from id)
2565  * @len: IE length
2566  * Returns: 0 on success, -1 on failure
2567  *
2568  * Inform WPA state machine about the RSN IE used in Beacon / Probe Response
2569  * frame.
2570  */
2571 int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2572 {
2573         if (sm == NULL)
2574                 return -1;
2575
2576         os_free(sm->ap_rsn_ie);
2577         if (ie == NULL || len == 0) {
2578                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2579                         "WPA: clearing AP RSN IE");
2580                 sm->ap_rsn_ie = NULL;
2581                 sm->ap_rsn_ie_len = 0;
2582         } else {
2583                 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
2584                 sm->ap_rsn_ie = os_malloc(len);
2585                 if (sm->ap_rsn_ie == NULL)
2586                         return -1;
2587
2588                 os_memcpy(sm->ap_rsn_ie, ie, len);
2589                 sm->ap_rsn_ie_len = len;
2590         }
2591
2592         return 0;
2593 }
2594
2595
2596 /**
2597  * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE
2598  * @sm: Pointer to WPA state machine data from wpa_sm_init()
2599  * @data: Pointer to data area for parsing results
2600  * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure
2601  *
2602  * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the
2603  * parsed data into data.
2604  */
2605 int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
2606 {
2607         if (sm == NULL)
2608                 return -1;
2609
2610         if (sm->assoc_wpa_ie == NULL) {
2611                 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2612                         "WPA: No WPA/RSN IE available from association info");
2613                 return -1;
2614         }
2615         if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
2616                 return -2;
2617         return 0;
2618 }
2619
2620
2621 int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
2622 {
2623 #ifndef CONFIG_NO_WPA2
2624         return pmksa_cache_list(sm->pmksa, buf, len);
2625 #else /* CONFIG_NO_WPA2 */
2626         return -1;
2627 #endif /* CONFIG_NO_WPA2 */
2628 }
2629
2630
2631 void wpa_sm_drop_sa(struct wpa_sm *sm)
2632 {
2633         wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK");
2634         sm->ptk_set = 0;
2635         sm->tptk_set = 0;
2636         os_memset(sm->pmk, 0, sizeof(sm->pmk));
2637         os_memset(&sm->ptk, 0, sizeof(sm->ptk));
2638         os_memset(&sm->tptk, 0, sizeof(sm->tptk));
2639 }
2640
2641
2642 int wpa_sm_has_ptk(struct wpa_sm *sm)
2643 {
2644         if (sm == NULL)
2645                 return 0;
2646         return sm->ptk_set;
2647 }
2648
2649
2650 void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr)
2651 {
2652         os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN);
2653 }
2654
2655
2656 void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx)
2657 {
2658 #ifndef CONFIG_NO_WPA2
2659         pmksa_cache_flush(sm->pmksa, network_ctx);
2660 #endif /* CONFIG_NO_WPA2 */
2661 }