wpa.c revision 43cb578dfe2c492257636f6234a24178ed27789e
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 */ 37void 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); 70out: 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 */ 85void 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 (sm->key_mgmt == WPA_KEY_MGMT_OSEN) 93 ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; 94 else if (wpa_key_mgmt_ft(sm->key_mgmt) || 95 wpa_key_mgmt_sha256(sm->key_mgmt)) 96 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; 97 else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) 98 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; 99 else 100 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; 101 102 if (wpa_sm_get_bssid(sm, bssid) < 0) { 103 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 104 "Failed to read BSSID for EAPOL-Key request"); 105 return; 106 } 107 108 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 109 sizeof(*reply), &rlen, (void *) &reply); 110 if (rbuf == NULL) 111 return; 112 113 reply->type = (sm->proto == WPA_PROTO_RSN || 114 sm->proto == WPA_PROTO_OSEN) ? 115 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 116 key_info = WPA_KEY_INFO_REQUEST | ver; 117 if (sm->ptk_set) 118 key_info |= WPA_KEY_INFO_MIC; 119 if (error) 120 key_info |= WPA_KEY_INFO_ERROR; 121 if (pairwise) 122 key_info |= WPA_KEY_INFO_KEY_TYPE; 123 WPA_PUT_BE16(reply->key_info, key_info); 124 WPA_PUT_BE16(reply->key_length, 0); 125 os_memcpy(reply->replay_counter, sm->request_counter, 126 WPA_REPLAY_COUNTER_LEN); 127 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); 128 129 WPA_PUT_BE16(reply->key_data_length, 0); 130 131 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 132 "WPA: Sending EAPOL-Key Request (error=%d " 133 "pairwise=%d ptk_set=%d len=%lu)", 134 error, pairwise, sm->ptk_set, (unsigned long) rlen); 135 wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL, 136 rbuf, rlen, key_info & WPA_KEY_INFO_MIC ? 137 reply->key_mic : NULL); 138} 139 140 141static int wpa_supplicant_get_pmk(struct wpa_sm *sm, 142 const unsigned char *src_addr, 143 const u8 *pmkid) 144{ 145 int abort_cached = 0; 146 147 if (pmkid && !sm->cur_pmksa) { 148 /* When using drivers that generate RSN IE, wpa_supplicant may 149 * not have enough time to get the association information 150 * event before receiving this 1/4 message, so try to find a 151 * matching PMKSA cache entry here. */ 152 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, 153 NULL); 154 if (sm->cur_pmksa) { 155 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 156 "RSN: found matching PMKID from PMKSA cache"); 157 } else { 158 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 159 "RSN: no matching PMKID found"); 160 abort_cached = 1; 161 } 162 } 163 164 if (pmkid && sm->cur_pmksa && 165 os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { 166 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); 167 wpa_sm_set_pmk_from_pmksa(sm); 168 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", 169 sm->pmk, sm->pmk_len); 170 eapol_sm_notify_cached(sm->eapol); 171#ifdef CONFIG_IEEE80211R 172 sm->xxkey_len = 0; 173#endif /* CONFIG_IEEE80211R */ 174 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { 175 int res, pmk_len; 176 pmk_len = PMK_LEN; 177 res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN); 178 if (res) { 179 /* 180 * EAP-LEAP is an exception from other EAP methods: it 181 * uses only 16-byte PMK. 182 */ 183 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); 184 pmk_len = 16; 185 } else { 186#ifdef CONFIG_IEEE80211R 187 u8 buf[2 * PMK_LEN]; 188 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) 189 { 190 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); 191 sm->xxkey_len = PMK_LEN; 192 os_memset(buf, 0, sizeof(buf)); 193 } 194#endif /* CONFIG_IEEE80211R */ 195 } 196 if (res == 0) { 197 struct rsn_pmksa_cache_entry *sa = NULL; 198 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " 199 "machines", sm->pmk, pmk_len); 200 sm->pmk_len = pmk_len; 201 if (sm->proto == WPA_PROTO_RSN && 202 !wpa_key_mgmt_ft(sm->key_mgmt)) { 203 sa = pmksa_cache_add(sm->pmksa, 204 sm->pmk, pmk_len, 205 src_addr, sm->own_addr, 206 sm->network_ctx, 207 sm->key_mgmt); 208 } 209 if (!sm->cur_pmksa && pmkid && 210 pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) 211 { 212 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 213 "RSN: the new PMK matches with the " 214 "PMKID"); 215 abort_cached = 0; 216 } 217 218 if (!sm->cur_pmksa) 219 sm->cur_pmksa = sa; 220 } else { 221 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 222 "WPA: Failed to get master session key from " 223 "EAPOL state machines - key handshake " 224 "aborted"); 225 if (sm->cur_pmksa) { 226 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 227 "RSN: Cancelled PMKSA caching " 228 "attempt"); 229 sm->cur_pmksa = NULL; 230 abort_cached = 1; 231 } else if (!abort_cached) { 232 return -1; 233 } 234 } 235 } 236 237 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && 238 !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) 239 { 240 /* Send EAPOL-Start to trigger full EAP authentication. */ 241 u8 *buf; 242 size_t buflen; 243 244 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 245 "RSN: no PMKSA entry found - trigger " 246 "full EAP authentication"); 247 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, 248 NULL, 0, &buflen, NULL); 249 if (buf) { 250 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, 251 buf, buflen); 252 os_free(buf); 253 return -2; 254 } 255 256 return -1; 257 } 258 259 return 0; 260} 261 262 263/** 264 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake 265 * @sm: Pointer to WPA state machine data from wpa_sm_init() 266 * @dst: Destination address for the frame 267 * @key: Pointer to the EAPOL-Key frame header 268 * @ver: Version bits from EAPOL-Key Key Info 269 * @nonce: Nonce value for the EAPOL-Key frame 270 * @wpa_ie: WPA/RSN IE 271 * @wpa_ie_len: Length of the WPA/RSN IE 272 * @ptk: PTK to use for keyed hash and encryption 273 * Returns: 0 on success, -1 on failure 274 */ 275int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, 276 const struct wpa_eapol_key *key, 277 int ver, const u8 *nonce, 278 const u8 *wpa_ie, size_t wpa_ie_len, 279 struct wpa_ptk *ptk) 280{ 281 size_t rlen; 282 struct wpa_eapol_key *reply; 283 u8 *rbuf; 284 u8 *rsn_ie_buf = NULL; 285 286 if (wpa_ie == NULL) { 287 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " 288 "cannot generate msg 2/4"); 289 return -1; 290 } 291 292#ifdef CONFIG_IEEE80211R 293 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 294 int res; 295 296 /* 297 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and 298 * FTIE from (Re)Association Response. 299 */ 300 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + 301 sm->assoc_resp_ies_len); 302 if (rsn_ie_buf == NULL) 303 return -1; 304 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); 305 res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len, 306 sm->pmk_r1_name); 307 if (res < 0) { 308 os_free(rsn_ie_buf); 309 return -1; 310 } 311 wpa_ie_len += res; 312 313 if (sm->assoc_resp_ies) { 314 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, 315 sm->assoc_resp_ies_len); 316 wpa_ie_len += sm->assoc_resp_ies_len; 317 } 318 319 wpa_ie = rsn_ie_buf; 320 } 321#endif /* CONFIG_IEEE80211R */ 322 323 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); 324 325 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, 326 NULL, sizeof(*reply) + wpa_ie_len, 327 &rlen, (void *) &reply); 328 if (rbuf == NULL) { 329 os_free(rsn_ie_buf); 330 return -1; 331 } 332 333 reply->type = (sm->proto == WPA_PROTO_RSN || 334 sm->proto == WPA_PROTO_OSEN) ? 335 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 336 WPA_PUT_BE16(reply->key_info, 337 ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC); 338 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 339 WPA_PUT_BE16(reply->key_length, 0); 340 else 341 os_memcpy(reply->key_length, key->key_length, 2); 342 os_memcpy(reply->replay_counter, key->replay_counter, 343 WPA_REPLAY_COUNTER_LEN); 344 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, 345 WPA_REPLAY_COUNTER_LEN); 346 347 WPA_PUT_BE16(reply->key_data_length, wpa_ie_len); 348 os_memcpy(reply + 1, wpa_ie, wpa_ie_len); 349 os_free(rsn_ie_buf); 350 351 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); 352 353 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); 354 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, 355 rbuf, rlen, reply->key_mic); 356 357 return 0; 358} 359 360 361static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, 362 const struct wpa_eapol_key *key, 363 struct wpa_ptk *ptk) 364{ 365 size_t ptk_len = wpa_cipher_key_len(sm->pairwise_cipher) + 32; 366#ifdef CONFIG_IEEE80211R 367 if (wpa_key_mgmt_ft(sm->key_mgmt)) 368 return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len); 369#endif /* CONFIG_IEEE80211R */ 370 371 wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", 372 sm->own_addr, sm->bssid, sm->snonce, key->key_nonce, 373 (u8 *) ptk, ptk_len, 374 wpa_key_mgmt_sha256(sm->key_mgmt)); 375 return 0; 376} 377 378 379static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, 380 const unsigned char *src_addr, 381 const struct wpa_eapol_key *key, 382 u16 ver, const u8 *key_data, 383 size_t key_data_len) 384{ 385 struct wpa_eapol_ie_parse ie; 386 struct wpa_ptk *ptk; 387 int res; 388 u8 *kde, *kde_buf = NULL; 389 size_t kde_len; 390 391 if (wpa_sm_get_network_ctx(sm) == NULL) { 392 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " 393 "found (msg 1 of 4)"); 394 return; 395 } 396 397 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 398 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " 399 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 400 401 os_memset(&ie, 0, sizeof(ie)); 402 403 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 404 /* RSN: msg 1/4 should contain PMKID for the selected PMK */ 405 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", 406 key_data, key_data_len); 407 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) 408 goto failed; 409 if (ie.pmkid) { 410 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " 411 "Authenticator", ie.pmkid, PMKID_LEN); 412 } 413 } 414 415 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); 416 if (res == -2) { 417 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " 418 "msg 1/4 - requesting full EAP authentication"); 419 return; 420 } 421 if (res) 422 goto failed; 423 424 if (sm->renew_snonce) { 425 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { 426 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 427 "WPA: Failed to get random data for SNonce"); 428 goto failed; 429 } 430 sm->renew_snonce = 0; 431 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", 432 sm->snonce, WPA_NONCE_LEN); 433 } 434 435 /* Calculate PTK which will be stored as a temporary PTK until it has 436 * been verified when processing message 3/4. */ 437 ptk = &sm->tptk; 438 wpa_derive_ptk(sm, src_addr, key, ptk); 439 if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { 440 u8 buf[8]; 441 /* Supplicant: swap tx/rx Mic keys */ 442 os_memcpy(buf, ptk->u.auth.tx_mic_key, 8); 443 os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8); 444 os_memcpy(ptk->u.auth.rx_mic_key, buf, 8); 445 os_memset(buf, 0, sizeof(buf)); 446 } 447 sm->tptk_set = 1; 448 449 kde = sm->assoc_wpa_ie; 450 kde_len = sm->assoc_wpa_ie_len; 451 452#ifdef CONFIG_P2P 453 if (sm->p2p) { 454 kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); 455 if (kde_buf) { 456 u8 *pos; 457 wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " 458 "into EAPOL-Key 2/4"); 459 os_memcpy(kde_buf, kde, kde_len); 460 kde = kde_buf; 461 pos = kde + kde_len; 462 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 463 *pos++ = RSN_SELECTOR_LEN + 1; 464 RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); 465 pos += RSN_SELECTOR_LEN; 466 *pos++ = 0x01; 467 kde_len = pos - kde; 468 } 469 } 470#endif /* CONFIG_P2P */ 471 472 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, 473 kde, kde_len, ptk)) 474 goto failed; 475 476 os_free(kde_buf); 477 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); 478 return; 479 480failed: 481 os_free(kde_buf); 482 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 483} 484 485 486static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) 487{ 488 struct wpa_sm *sm = eloop_ctx; 489 rsn_preauth_candidate_process(sm); 490} 491 492 493static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, 494 const u8 *addr, int secure) 495{ 496 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 497 "WPA: Key negotiation completed with " 498 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), 499 wpa_cipher_txt(sm->pairwise_cipher), 500 wpa_cipher_txt(sm->group_cipher)); 501 wpa_sm_cancel_auth_timeout(sm); 502 wpa_sm_set_state(sm, WPA_COMPLETED); 503 504 if (secure) { 505 wpa_sm_mlme_setprotection( 506 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, 507 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 508 eapol_sm_notify_portValid(sm->eapol, TRUE); 509 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) 510 eapol_sm_notify_eap_success(sm->eapol, TRUE); 511 /* 512 * Start preauthentication after a short wait to avoid a 513 * possible race condition between the data receive and key 514 * configuration after the 4-Way Handshake. This increases the 515 * likelihood of the first preauth EAPOL-Start frame getting to 516 * the target AP. 517 */ 518 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); 519 } 520 521 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { 522 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 523 "RSN: Authenticator accepted " 524 "opportunistic PMKSA entry - marking it valid"); 525 sm->cur_pmksa->opportunistic = 0; 526 } 527 528#ifdef CONFIG_IEEE80211R 529 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 530 /* Prepare for the next transition */ 531 wpa_ft_prepare_auth_request(sm, NULL); 532 } 533#endif /* CONFIG_IEEE80211R */ 534} 535 536 537static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) 538{ 539 struct wpa_sm *sm = eloop_ctx; 540 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); 541 wpa_sm_key_request(sm, 0, 1); 542} 543 544 545static int wpa_supplicant_install_ptk(struct wpa_sm *sm, 546 const struct wpa_eapol_key *key) 547{ 548 int keylen, rsclen; 549 enum wpa_alg alg; 550 const u8 *key_rsc; 551 u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 552 553 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 554 "WPA: Installing PTK to the driver"); 555 556 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 557 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " 558 "Suite: NONE - do not use pairwise keys"); 559 return 0; 560 } 561 562 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { 563 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 564 "WPA: Unsupported pairwise cipher %d", 565 sm->pairwise_cipher); 566 return -1; 567 } 568 569 alg = wpa_cipher_to_alg(sm->pairwise_cipher); 570 keylen = wpa_cipher_key_len(sm->pairwise_cipher); 571 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); 572 573 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 574 key_rsc = null_rsc; 575 } else { 576 key_rsc = key->key_rsc; 577 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); 578 } 579 580 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, 581 (u8 *) sm->ptk.tk1, keylen) < 0) { 582 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 583 "WPA: Failed to set PTK to the " 584 "driver (alg=%d keylen=%d bssid=" MACSTR ")", 585 alg, keylen, MAC2STR(sm->bssid)); 586 return -1; 587 } 588 589 if (sm->wpa_ptk_rekey) { 590 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 591 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, 592 sm, NULL); 593 } 594 595 return 0; 596} 597 598 599static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, 600 int group_cipher, 601 int keylen, int maxkeylen, 602 int *key_rsc_len, 603 enum wpa_alg *alg) 604{ 605 int klen; 606 607 *alg = wpa_cipher_to_alg(group_cipher); 608 if (*alg == WPA_ALG_NONE) { 609 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 610 "WPA: Unsupported Group Cipher %d", 611 group_cipher); 612 return -1; 613 } 614 *key_rsc_len = wpa_cipher_rsc_len(group_cipher); 615 616 klen = wpa_cipher_key_len(group_cipher); 617 if (keylen != klen || maxkeylen < klen) { 618 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 619 "WPA: Unsupported %s Group Cipher key length %d (%d)", 620 wpa_cipher_txt(group_cipher), keylen, maxkeylen); 621 return -1; 622 } 623 return 0; 624} 625 626 627struct wpa_gtk_data { 628 enum wpa_alg alg; 629 int tx, key_rsc_len, keyidx; 630 u8 gtk[32]; 631 int gtk_len; 632}; 633 634 635static int wpa_supplicant_install_gtk(struct wpa_sm *sm, 636 const struct wpa_gtk_data *gd, 637 const u8 *key_rsc) 638{ 639 const u8 *_gtk = gd->gtk; 640 u8 gtk_buf[32]; 641 642 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); 643 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 644 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", 645 gd->keyidx, gd->tx, gd->gtk_len); 646 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); 647 if (sm->group_cipher == WPA_CIPHER_TKIP) { 648 /* Swap Tx/Rx keys for Michael MIC */ 649 os_memcpy(gtk_buf, gd->gtk, 16); 650 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); 651 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); 652 _gtk = gtk_buf; 653 } 654 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 655 if (wpa_sm_set_key(sm, gd->alg, NULL, 656 gd->keyidx, 1, key_rsc, gd->key_rsc_len, 657 _gtk, gd->gtk_len) < 0) { 658 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 659 "WPA: Failed to set GTK to the driver " 660 "(Group only)"); 661 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 662 return -1; 663 } 664 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, 665 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, 666 _gtk, gd->gtk_len) < 0) { 667 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 668 "WPA: Failed to set GTK to " 669 "the driver (alg=%d keylen=%d keyidx=%d)", 670 gd->alg, gd->gtk_len, gd->keyidx); 671 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 672 return -1; 673 } 674 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 675 676 return 0; 677} 678 679 680static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, 681 int tx) 682{ 683 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { 684 /* Ignore Tx bit for GTK if a pairwise key is used. One AP 685 * seemed to set this bit (incorrectly, since Tx is only when 686 * doing Group Key only APs) and without this workaround, the 687 * data connection does not work because wpa_supplicant 688 * configured non-zero keyidx to be used for unicast. */ 689 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 690 "WPA: Tx bit set for GTK, but pairwise " 691 "keys are used - ignore Tx bit"); 692 return 0; 693 } 694 return tx; 695} 696 697 698static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, 699 const struct wpa_eapol_key *key, 700 const u8 *gtk, size_t gtk_len, 701 int key_info) 702{ 703 struct wpa_gtk_data gd; 704 705 /* 706 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x 707 * GTK KDE format: 708 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] 709 * Reserved [bits 0-7] 710 * GTK 711 */ 712 713 os_memset(&gd, 0, sizeof(gd)); 714 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", 715 gtk, gtk_len); 716 717 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) 718 return -1; 719 720 gd.keyidx = gtk[0] & 0x3; 721 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 722 !!(gtk[0] & BIT(2))); 723 gtk += 2; 724 gtk_len -= 2; 725 726 os_memcpy(gd.gtk, gtk, gtk_len); 727 gd.gtk_len = gtk_len; 728 729 if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && 730 (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 731 gtk_len, gtk_len, 732 &gd.key_rsc_len, &gd.alg) || 733 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc))) { 734 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 735 "RSN: Failed to install GTK"); 736 os_memset(&gd, 0, sizeof(gd)); 737 return -1; 738 } 739 os_memset(&gd, 0, sizeof(gd)); 740 741 wpa_supplicant_key_neg_complete(sm, sm->bssid, 742 key_info & WPA_KEY_INFO_SECURE); 743 return 0; 744} 745 746 747static int ieee80211w_set_keys(struct wpa_sm *sm, 748 struct wpa_eapol_ie_parse *ie) 749{ 750#ifdef CONFIG_IEEE80211W 751 if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) 752 return 0; 753 754 if (ie->igtk) { 755 size_t len; 756 const struct wpa_igtk_kde *igtk; 757 u16 keyidx; 758 len = wpa_cipher_key_len(sm->mgmt_group_cipher); 759 if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) 760 return -1; 761 igtk = (const struct wpa_igtk_kde *) ie->igtk; 762 keyidx = WPA_GET_LE16(igtk->keyid); 763 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " 764 "pn %02x%02x%02x%02x%02x%02x", 765 keyidx, MAC2STR(igtk->pn)); 766 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", 767 igtk->igtk, len); 768 if (keyidx > 4095) { 769 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 770 "WPA: Invalid IGTK KeyID %d", keyidx); 771 return -1; 772 } 773 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), 774 broadcast_ether_addr, 775 keyidx, 0, igtk->pn, sizeof(igtk->pn), 776 igtk->igtk, len) < 0) { 777 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 778 "WPA: Failed to configure IGTK to the driver"); 779 return -1; 780 } 781 } 782 783 return 0; 784#else /* CONFIG_IEEE80211W */ 785 return 0; 786#endif /* CONFIG_IEEE80211W */ 787} 788 789 790static void wpa_report_ie_mismatch(struct wpa_sm *sm, 791 const char *reason, const u8 *src_addr, 792 const u8 *wpa_ie, size_t wpa_ie_len, 793 const u8 *rsn_ie, size_t rsn_ie_len) 794{ 795 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", 796 reason, MAC2STR(src_addr)); 797 798 if (sm->ap_wpa_ie) { 799 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", 800 sm->ap_wpa_ie, sm->ap_wpa_ie_len); 801 } 802 if (wpa_ie) { 803 if (!sm->ap_wpa_ie) { 804 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 805 "WPA: No WPA IE in Beacon/ProbeResp"); 806 } 807 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", 808 wpa_ie, wpa_ie_len); 809 } 810 811 if (sm->ap_rsn_ie) { 812 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", 813 sm->ap_rsn_ie, sm->ap_rsn_ie_len); 814 } 815 if (rsn_ie) { 816 if (!sm->ap_rsn_ie) { 817 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 818 "WPA: No RSN IE in Beacon/ProbeResp"); 819 } 820 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", 821 rsn_ie, rsn_ie_len); 822 } 823 824 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); 825} 826 827 828#ifdef CONFIG_IEEE80211R 829 830static int ft_validate_mdie(struct wpa_sm *sm, 831 const unsigned char *src_addr, 832 struct wpa_eapol_ie_parse *ie, 833 const u8 *assoc_resp_mdie) 834{ 835 struct rsn_mdie *mdie; 836 837 mdie = (struct rsn_mdie *) (ie->mdie + 2); 838 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || 839 os_memcmp(mdie->mobility_domain, sm->mobility_domain, 840 MOBILITY_DOMAIN_ID_LEN) != 0) { 841 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " 842 "not match with the current mobility domain"); 843 return -1; 844 } 845 846 if (assoc_resp_mdie && 847 (assoc_resp_mdie[1] != ie->mdie[1] || 848 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { 849 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); 850 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", 851 ie->mdie, 2 + ie->mdie[1]); 852 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", 853 assoc_resp_mdie, 2 + assoc_resp_mdie[1]); 854 return -1; 855 } 856 857 return 0; 858} 859 860 861static int ft_validate_ftie(struct wpa_sm *sm, 862 const unsigned char *src_addr, 863 struct wpa_eapol_ie_parse *ie, 864 const u8 *assoc_resp_ftie) 865{ 866 if (ie->ftie == NULL) { 867 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 868 "FT: No FTIE in EAPOL-Key msg 3/4"); 869 return -1; 870 } 871 872 if (assoc_resp_ftie == NULL) 873 return 0; 874 875 if (assoc_resp_ftie[1] != ie->ftie[1] || 876 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { 877 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); 878 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", 879 ie->ftie, 2 + ie->ftie[1]); 880 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", 881 assoc_resp_ftie, 2 + assoc_resp_ftie[1]); 882 return -1; 883 } 884 885 return 0; 886} 887 888 889static int ft_validate_rsnie(struct wpa_sm *sm, 890 const unsigned char *src_addr, 891 struct wpa_eapol_ie_parse *ie) 892{ 893 struct wpa_ie_data rsn; 894 895 if (!ie->rsn_ie) 896 return 0; 897 898 /* 899 * Verify that PMKR1Name from EAPOL-Key message 3/4 900 * matches with the value we derived. 901 */ 902 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || 903 rsn.num_pmkid != 1 || rsn.pmkid == NULL) { 904 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " 905 "FT 4-way handshake message 3/4"); 906 return -1; 907 } 908 909 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { 910 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 911 "FT: PMKR1Name mismatch in " 912 "FT 4-way handshake message 3/4"); 913 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", 914 rsn.pmkid, WPA_PMK_NAME_LEN); 915 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", 916 sm->pmk_r1_name, WPA_PMK_NAME_LEN); 917 return -1; 918 } 919 920 return 0; 921} 922 923 924static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, 925 const unsigned char *src_addr, 926 struct wpa_eapol_ie_parse *ie) 927{ 928 const u8 *pos, *end, *mdie = NULL, *ftie = NULL; 929 930 if (sm->assoc_resp_ies) { 931 pos = sm->assoc_resp_ies; 932 end = pos + sm->assoc_resp_ies_len; 933 while (pos + 2 < end) { 934 if (pos + 2 + pos[1] > end) 935 break; 936 switch (*pos) { 937 case WLAN_EID_MOBILITY_DOMAIN: 938 mdie = pos; 939 break; 940 case WLAN_EID_FAST_BSS_TRANSITION: 941 ftie = pos; 942 break; 943 } 944 pos += 2 + pos[1]; 945 } 946 } 947 948 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || 949 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || 950 ft_validate_rsnie(sm, src_addr, ie) < 0) 951 return -1; 952 953 return 0; 954} 955 956#endif /* CONFIG_IEEE80211R */ 957 958 959static int wpa_supplicant_validate_ie(struct wpa_sm *sm, 960 const unsigned char *src_addr, 961 struct wpa_eapol_ie_parse *ie) 962{ 963 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { 964 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 965 "WPA: No WPA/RSN IE for this AP known. " 966 "Trying to get from scan results"); 967 if (wpa_sm_get_beacon_ie(sm) < 0) { 968 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 969 "WPA: Could not find AP from " 970 "the scan results"); 971 } else { 972 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, 973 "WPA: Found the current AP from " 974 "updated scan results"); 975 } 976 } 977 978 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && 979 (sm->ap_wpa_ie || sm->ap_rsn_ie)) { 980 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 981 "with IE in Beacon/ProbeResp (no IE?)", 982 src_addr, ie->wpa_ie, ie->wpa_ie_len, 983 ie->rsn_ie, ie->rsn_ie_len); 984 return -1; 985 } 986 987 if ((ie->wpa_ie && sm->ap_wpa_ie && 988 (ie->wpa_ie_len != sm->ap_wpa_ie_len || 989 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || 990 (ie->rsn_ie && sm->ap_rsn_ie && 991 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), 992 sm->ap_rsn_ie, sm->ap_rsn_ie_len, 993 ie->rsn_ie, ie->rsn_ie_len))) { 994 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 995 "with IE in Beacon/ProbeResp", 996 src_addr, ie->wpa_ie, ie->wpa_ie_len, 997 ie->rsn_ie, ie->rsn_ie_len); 998 return -1; 999 } 1000 1001 if (sm->proto == WPA_PROTO_WPA && 1002 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { 1003 wpa_report_ie_mismatch(sm, "Possible downgrade attack " 1004 "detected - RSN was enabled and RSN IE " 1005 "was in msg 3/4, but not in " 1006 "Beacon/ProbeResp", 1007 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1008 ie->rsn_ie, ie->rsn_ie_len); 1009 return -1; 1010 } 1011 1012#ifdef CONFIG_IEEE80211R 1013 if (wpa_key_mgmt_ft(sm->key_mgmt) && 1014 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) 1015 return -1; 1016#endif /* CONFIG_IEEE80211R */ 1017 1018 return 0; 1019} 1020 1021 1022/** 1023 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake 1024 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1025 * @dst: Destination address for the frame 1026 * @key: Pointer to the EAPOL-Key frame header 1027 * @ver: Version bits from EAPOL-Key Key Info 1028 * @key_info: Key Info 1029 * @ptk: PTK to use for keyed hash and encryption 1030 * Returns: 0 on success, -1 on failure 1031 */ 1032int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 1033 const struct wpa_eapol_key *key, 1034 u16 ver, u16 key_info, 1035 struct wpa_ptk *ptk) 1036{ 1037 size_t rlen; 1038 struct wpa_eapol_key *reply; 1039 u8 *rbuf; 1040 1041 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1042 sizeof(*reply), &rlen, (void *) &reply); 1043 if (rbuf == NULL) 1044 return -1; 1045 1046 reply->type = (sm->proto == WPA_PROTO_RSN || 1047 sm->proto == WPA_PROTO_OSEN) ? 1048 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1049 key_info &= WPA_KEY_INFO_SECURE; 1050 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; 1051 WPA_PUT_BE16(reply->key_info, key_info); 1052 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1053 WPA_PUT_BE16(reply->key_length, 0); 1054 else 1055 os_memcpy(reply->key_length, key->key_length, 2); 1056 os_memcpy(reply->replay_counter, key->replay_counter, 1057 WPA_REPLAY_COUNTER_LEN); 1058 1059 WPA_PUT_BE16(reply->key_data_length, 0); 1060 1061 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); 1062 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, 1063 rbuf, rlen, reply->key_mic); 1064 1065 return 0; 1066} 1067 1068 1069static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, 1070 const struct wpa_eapol_key *key, 1071 u16 ver, const u8 *key_data, 1072 size_t key_data_len) 1073{ 1074 u16 key_info, keylen; 1075 struct wpa_eapol_ie_parse ie; 1076 1077 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 1078 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " 1079 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); 1080 1081 key_info = WPA_GET_BE16(key->key_info); 1082 1083 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); 1084 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) 1085 goto failed; 1086 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1087 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1088 "WPA: GTK IE in unencrypted key data"); 1089 goto failed; 1090 } 1091#ifdef CONFIG_IEEE80211W 1092 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1093 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1094 "WPA: IGTK KDE in unencrypted key data"); 1095 goto failed; 1096 } 1097 1098 if (ie.igtk && 1099 wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && 1100 ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + 1101 (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { 1102 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1103 "WPA: Invalid IGTK KDE length %lu", 1104 (unsigned long) ie.igtk_len); 1105 goto failed; 1106 } 1107#endif /* CONFIG_IEEE80211W */ 1108 1109 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1110 goto failed; 1111 1112 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1113 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1114 "WPA: ANonce from message 1 of 4-Way Handshake " 1115 "differs from 3 of 4-Way Handshake - drop packet (src=" 1116 MACSTR ")", MAC2STR(sm->bssid)); 1117 goto failed; 1118 } 1119 1120 keylen = WPA_GET_BE16(key->key_length); 1121 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { 1122 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1123 "WPA: Invalid %s key length %d (src=" MACSTR 1124 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, 1125 MAC2STR(sm->bssid)); 1126 goto failed; 1127 } 1128 1129#ifdef CONFIG_P2P 1130 if (ie.ip_addr_alloc) { 1131 os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); 1132 wpa_hexdump(MSG_DEBUG, "P2P: IP address info", 1133 sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); 1134 } 1135#endif /* CONFIG_P2P */ 1136 1137 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1138 &sm->ptk)) { 1139 goto failed; 1140 } 1141 1142 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1143 * for the next 4-Way Handshake. If msg 3 is received again, the old 1144 * SNonce will still be used to avoid changing PTK. */ 1145 sm->renew_snonce = 1; 1146 1147 if (key_info & WPA_KEY_INFO_INSTALL) { 1148 if (wpa_supplicant_install_ptk(sm, key)) 1149 goto failed; 1150 } 1151 1152 if (key_info & WPA_KEY_INFO_SECURE) { 1153 wpa_sm_mlme_setprotection( 1154 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1155 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1156 eapol_sm_notify_portValid(sm->eapol, TRUE); 1157 } 1158 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1159 1160 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { 1161 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1162 key_info & WPA_KEY_INFO_SECURE); 1163 } else if (ie.gtk && 1164 wpa_supplicant_pairwise_gtk(sm, key, 1165 ie.gtk, ie.gtk_len, key_info) < 0) { 1166 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1167 "RSN: Failed to configure GTK"); 1168 goto failed; 1169 } 1170 1171 if (ieee80211w_set_keys(sm, &ie) < 0) { 1172 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1173 "RSN: Failed to configure IGTK"); 1174 goto failed; 1175 } 1176 1177 if (ie.gtk) 1178 wpa_sm_set_rekey_offload(sm); 1179 1180 return; 1181 1182failed: 1183 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1184} 1185 1186 1187static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1188 const u8 *keydata, 1189 size_t keydatalen, 1190 u16 key_info, 1191 struct wpa_gtk_data *gd) 1192{ 1193 int maxkeylen; 1194 struct wpa_eapol_ie_parse ie; 1195 1196 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); 1197 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1198 return -1; 1199 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1200 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1201 "WPA: GTK IE in unencrypted key data"); 1202 return -1; 1203 } 1204 if (ie.gtk == NULL) { 1205 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1206 "WPA: No GTK IE in Group Key msg 1/2"); 1207 return -1; 1208 } 1209 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1210 1211 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1212 gd->gtk_len, maxkeylen, 1213 &gd->key_rsc_len, &gd->alg)) 1214 return -1; 1215 1216 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", 1217 ie.gtk, ie.gtk_len); 1218 gd->keyidx = ie.gtk[0] & 0x3; 1219 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1220 !!(ie.gtk[0] & BIT(2))); 1221 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1222 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1223 "RSN: Too long GTK in GTK IE (len=%lu)", 1224 (unsigned long) ie.gtk_len - 2); 1225 return -1; 1226 } 1227 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1228 1229 if (ieee80211w_set_keys(sm, &ie) < 0) 1230 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1231 "RSN: Failed to configure IGTK"); 1232 1233 return 0; 1234} 1235 1236 1237static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1238 const struct wpa_eapol_key *key, 1239 const u8 *key_data, 1240 size_t key_data_len, u16 key_info, 1241 u16 ver, struct wpa_gtk_data *gd) 1242{ 1243 size_t maxkeylen; 1244 1245 gd->gtk_len = WPA_GET_BE16(key->key_length); 1246 maxkeylen = key_data_len; 1247 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1248 if (maxkeylen < 8) { 1249 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1250 "WPA: Too short maxkeylen (%lu)", 1251 (unsigned long) maxkeylen); 1252 return -1; 1253 } 1254 maxkeylen -= 8; 1255 } 1256 1257 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1258 gd->gtk_len, maxkeylen, 1259 &gd->key_rsc_len, &gd->alg)) 1260 return -1; 1261 1262 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1263 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1264 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1265 u8 ek[32]; 1266 if (key_data_len > sizeof(gd->gtk)) { 1267 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1268 "WPA: RC4 key data too long (%lu)", 1269 (unsigned long) key_data_len); 1270 return -1; 1271 } 1272 os_memcpy(ek, key->key_iv, 16); 1273 os_memcpy(ek + 16, sm->ptk.kek, 16); 1274 os_memcpy(gd->gtk, key_data, key_data_len); 1275 if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { 1276 os_memset(ek, 0, sizeof(ek)); 1277 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1278 "WPA: RC4 failed"); 1279 return -1; 1280 } 1281 os_memset(ek, 0, sizeof(ek)); 1282 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1283 if (maxkeylen % 8) { 1284 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1285 "WPA: Unsupported AES-WRAP len %lu", 1286 (unsigned long) maxkeylen); 1287 return -1; 1288 } 1289 if (maxkeylen > sizeof(gd->gtk)) { 1290 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1291 "WPA: AES-WRAP key data " 1292 "too long (keydatalen=%lu maxkeylen=%lu)", 1293 (unsigned long) key_data_len, 1294 (unsigned long) maxkeylen); 1295 return -1; 1296 } 1297 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, key_data, gd->gtk)) { 1298 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1299 "WPA: AES unwrap failed - could not decrypt " 1300 "GTK"); 1301 return -1; 1302 } 1303 } else { 1304 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1305 "WPA: Unsupported key_info type %d", ver); 1306 return -1; 1307 } 1308 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1309 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1310 return 0; 1311} 1312 1313 1314static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1315 const struct wpa_eapol_key *key, 1316 int ver, u16 key_info) 1317{ 1318 size_t rlen; 1319 struct wpa_eapol_key *reply; 1320 u8 *rbuf; 1321 1322 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1323 sizeof(*reply), &rlen, (void *) &reply); 1324 if (rbuf == NULL) 1325 return -1; 1326 1327 reply->type = (sm->proto == WPA_PROTO_RSN || 1328 sm->proto == WPA_PROTO_OSEN) ? 1329 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1330 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1331 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; 1332 WPA_PUT_BE16(reply->key_info, key_info); 1333 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1334 WPA_PUT_BE16(reply->key_length, 0); 1335 else 1336 os_memcpy(reply->key_length, key->key_length, 2); 1337 os_memcpy(reply->replay_counter, key->replay_counter, 1338 WPA_REPLAY_COUNTER_LEN); 1339 1340 WPA_PUT_BE16(reply->key_data_length, 0); 1341 1342 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1343 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, 1344 rbuf, rlen, reply->key_mic); 1345 1346 return 0; 1347} 1348 1349 1350static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1351 const unsigned char *src_addr, 1352 const struct wpa_eapol_key *key, 1353 const u8 *key_data, 1354 size_t key_data_len, u16 ver) 1355{ 1356 u16 key_info; 1357 int rekey, ret; 1358 struct wpa_gtk_data gd; 1359 1360 os_memset(&gd, 0, sizeof(gd)); 1361 1362 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1363 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1364 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1365 1366 key_info = WPA_GET_BE16(key->key_info); 1367 1368 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 1369 ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, 1370 key_data_len, key_info, 1371 &gd); 1372 } else { 1373 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, 1374 key_data_len, 1375 key_info, ver, &gd); 1376 } 1377 1378 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1379 1380 if (ret) 1381 goto failed; 1382 1383 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || 1384 wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) 1385 goto failed; 1386 1387 if (rekey) { 1388 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " 1389 "completed with " MACSTR " [GTK=%s]", 1390 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1391 wpa_sm_cancel_auth_timeout(sm); 1392 wpa_sm_set_state(sm, WPA_COMPLETED); 1393 } else { 1394 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1395 key_info & 1396 WPA_KEY_INFO_SECURE); 1397 } 1398 1399 wpa_sm_set_rekey_offload(sm); 1400 1401 return; 1402 1403failed: 1404 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1405} 1406 1407 1408static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1409 struct wpa_eapol_key *key, 1410 u16 ver, 1411 const u8 *buf, size_t len) 1412{ 1413 u8 mic[16]; 1414 int ok = 0; 1415 1416 os_memcpy(mic, key->key_mic, 16); 1417 if (sm->tptk_set) { 1418 os_memset(key->key_mic, 0, 16); 1419 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, 1420 key->key_mic); 1421 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1422 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1423 "WPA: Invalid EAPOL-Key MIC " 1424 "when using TPTK - ignoring TPTK"); 1425 } else { 1426 ok = 1; 1427 sm->tptk_set = 0; 1428 sm->ptk_set = 1; 1429 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1430 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 1431 } 1432 } 1433 1434 if (!ok && sm->ptk_set) { 1435 os_memset(key->key_mic, 0, 16); 1436 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len, 1437 key->key_mic); 1438 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1439 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1440 "WPA: Invalid EAPOL-Key MIC - " 1441 "dropping packet"); 1442 return -1; 1443 } 1444 ok = 1; 1445 } 1446 1447 if (!ok) { 1448 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1449 "WPA: Could not verify EAPOL-Key MIC - " 1450 "dropping packet"); 1451 return -1; 1452 } 1453 1454 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1455 WPA_REPLAY_COUNTER_LEN); 1456 sm->rx_replay_counter_set = 1; 1457 return 0; 1458} 1459 1460 1461/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ 1462static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, 1463 struct wpa_eapol_key *key, u16 ver, 1464 u8 *key_data, size_t *key_data_len) 1465{ 1466 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", 1467 key_data, *key_data_len); 1468 if (!sm->ptk_set) { 1469 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1470 "WPA: PTK not available, cannot decrypt EAPOL-Key Key " 1471 "Data"); 1472 return -1; 1473 } 1474 1475 /* Decrypt key data here so that this operation does not need 1476 * to be implemented separately for each message type. */ 1477 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1478 u8 ek[32]; 1479 os_memcpy(ek, key->key_iv, 16); 1480 os_memcpy(ek + 16, sm->ptk.kek, 16); 1481 if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { 1482 os_memset(ek, 0, sizeof(ek)); 1483 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1484 "WPA: RC4 failed"); 1485 return -1; 1486 } 1487 os_memset(ek, 0, sizeof(ek)); 1488 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1489 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || 1490 sm->key_mgmt == WPA_KEY_MGMT_OSEN) { 1491 u8 *buf; 1492 if (*key_data_len < 8 || *key_data_len % 8) { 1493 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1494 "WPA: Unsupported AES-WRAP len %u", 1495 (unsigned int) *key_data_len); 1496 return -1; 1497 } 1498 *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ 1499 buf = os_malloc(*key_data_len); 1500 if (buf == NULL) { 1501 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1502 "WPA: No memory for AES-UNWRAP buffer"); 1503 return -1; 1504 } 1505 if (aes_unwrap(sm->ptk.kek, *key_data_len / 8, 1506 key_data, buf)) { 1507 os_free(buf); 1508 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1509 "WPA: AES unwrap failed - " 1510 "could not decrypt EAPOL-Key key data"); 1511 return -1; 1512 } 1513 os_memcpy(key_data, buf, *key_data_len); 1514 os_free(buf); 1515 WPA_PUT_BE16(key->key_data_length, *key_data_len); 1516 } else { 1517 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1518 "WPA: Unsupported key_info type %d", ver); 1519 return -1; 1520 } 1521 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 1522 key_data, *key_data_len); 1523 return 0; 1524} 1525 1526 1527/** 1528 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 1529 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1530 */ 1531void wpa_sm_aborted_cached(struct wpa_sm *sm) 1532{ 1533 if (sm && sm->cur_pmksa) { 1534 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1535 "RSN: Cancelling PMKSA caching attempt"); 1536 sm->cur_pmksa = NULL; 1537 } 1538} 1539 1540 1541static void wpa_eapol_key_dump(struct wpa_sm *sm, 1542 const struct wpa_eapol_key *key) 1543{ 1544#ifndef CONFIG_NO_STDOUT_DEBUG 1545 u16 key_info = WPA_GET_BE16(key->key_info); 1546 1547 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 1548 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1549 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 1550 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 1551 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1552 WPA_KEY_INFO_KEY_INDEX_SHIFT, 1553 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 1554 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 1555 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 1556 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 1557 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 1558 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 1559 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 1560 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 1561 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 1562 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1563 " key_length=%u key_data_length=%u", 1564 WPA_GET_BE16(key->key_length), 1565 WPA_GET_BE16(key->key_data_length)); 1566 wpa_hexdump(MSG_DEBUG, " replay_counter", 1567 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 1568 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 1569 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 1570 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 1571 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 1572 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); 1573#endif /* CONFIG_NO_STDOUT_DEBUG */ 1574} 1575 1576 1577/** 1578 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 1579 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1580 * @src_addr: Source MAC address of the EAPOL packet 1581 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 1582 * @len: Length of the EAPOL frame 1583 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 1584 * 1585 * This function is called for each received EAPOL frame. Other than EAPOL-Key 1586 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 1587 * only processing WPA and WPA2 EAPOL-Key frames. 1588 * 1589 * The received EAPOL-Key packets are validated and valid packets are replied 1590 * to. In addition, key material (PTK, GTK) is configured at the end of a 1591 * successful key handshake. 1592 */ 1593int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 1594 const u8 *buf, size_t len) 1595{ 1596 size_t plen, data_len, key_data_len; 1597 const struct ieee802_1x_hdr *hdr; 1598 struct wpa_eapol_key *key; 1599 u16 key_info, ver; 1600 u8 *tmp = NULL; 1601 int ret = -1; 1602 struct wpa_peerkey *peerkey = NULL; 1603 u8 *key_data; 1604 1605#ifdef CONFIG_IEEE80211R 1606 sm->ft_completed = 0; 1607#endif /* CONFIG_IEEE80211R */ 1608 1609 if (len < sizeof(*hdr) + sizeof(*key)) { 1610 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1611 "WPA: EAPOL frame too short to be a WPA " 1612 "EAPOL-Key (len %lu, expecting at least %lu)", 1613 (unsigned long) len, 1614 (unsigned long) sizeof(*hdr) + sizeof(*key)); 1615 return 0; 1616 } 1617 1618 hdr = (const struct ieee802_1x_hdr *) buf; 1619 plen = be_to_host16(hdr->length); 1620 data_len = plen + sizeof(*hdr); 1621 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1622 "IEEE 802.1X RX: version=%d type=%d length=%lu", 1623 hdr->version, hdr->type, (unsigned long) plen); 1624 1625 if (hdr->version < EAPOL_VERSION) { 1626 /* TODO: backwards compatibility */ 1627 } 1628 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 1629 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1630 "WPA: EAPOL frame (type %u) discarded, " 1631 "not a Key frame", hdr->type); 1632 ret = 0; 1633 goto out; 1634 } 1635 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); 1636 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { 1637 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1638 "WPA: EAPOL frame payload size %lu " 1639 "invalid (frame size %lu)", 1640 (unsigned long) plen, (unsigned long) len); 1641 ret = 0; 1642 goto out; 1643 } 1644 if (data_len < len) { 1645 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1646 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 1647 (unsigned long) len - data_len); 1648 } 1649 1650 /* 1651 * Make a copy of the frame since we need to modify the buffer during 1652 * MAC validation and Key Data decryption. 1653 */ 1654 tmp = os_malloc(data_len); 1655 if (tmp == NULL) 1656 goto out; 1657 os_memcpy(tmp, buf, data_len); 1658 key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); 1659 key_data = (u8 *) (key + 1); 1660 1661 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) 1662 { 1663 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1664 "WPA: EAPOL-Key type (%d) unknown, discarded", 1665 key->type); 1666 ret = 0; 1667 goto out; 1668 } 1669 wpa_eapol_key_dump(sm, key); 1670 1671 key_data_len = WPA_GET_BE16(key->key_data_length); 1672 if (key_data_len > plen - sizeof(struct wpa_eapol_key)) { 1673 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 1674 "frame - key_data overflow (%u > %u)", 1675 (unsigned int) key_data_len, 1676 (unsigned int) (plen - sizeof(struct wpa_eapol_key))); 1677 goto out; 1678 } 1679 1680 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 1681 key_info = WPA_GET_BE16(key->key_info); 1682 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 1683 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 1684#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 1685 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1686#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 1687 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && 1688 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1689 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1690 "WPA: Unsupported EAPOL-Key descriptor version %d", 1691 ver); 1692 goto out; 1693 } 1694 1695 if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && 1696 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { 1697 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1698 "OSEN: Unsupported EAPOL-Key descriptor version %d", 1699 ver); 1700 goto out; 1701 } 1702 1703#ifdef CONFIG_IEEE80211R 1704 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 1705 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 1706 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1707 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1708 "FT: AP did not use AES-128-CMAC"); 1709 goto out; 1710 } 1711 } else 1712#endif /* CONFIG_IEEE80211R */ 1713#ifdef CONFIG_IEEE80211W 1714 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 1715 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1716 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1717 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1718 "WPA: AP did not use the " 1719 "negotiated AES-128-CMAC"); 1720 goto out; 1721 } 1722 } else 1723#endif /* CONFIG_IEEE80211W */ 1724 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 1725 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1726 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1727 "WPA: CCMP is used, but EAPOL-Key " 1728 "descriptor version (%d) is not 2", ver); 1729 if (sm->group_cipher != WPA_CIPHER_CCMP && 1730 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 1731 /* Earlier versions of IEEE 802.11i did not explicitly 1732 * require version 2 descriptor for all EAPOL-Key 1733 * packets, so allow group keys to use version 1 if 1734 * CCMP is not used for them. */ 1735 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1736 "WPA: Backwards compatibility: allow invalid " 1737 "version for non-CCMP group keys"); 1738 } else 1739 goto out; 1740 } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 1741 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1742 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1743 "WPA: GCMP is used, but EAPOL-Key " 1744 "descriptor version (%d) is not 2", ver); 1745 goto out; 1746 } 1747 1748#ifdef CONFIG_PEERKEY 1749 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 1750 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 1751 break; 1752 } 1753 1754 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { 1755 if (!peerkey->initiator && peerkey->replay_counter_set && 1756 os_memcmp(key->replay_counter, peerkey->replay_counter, 1757 WPA_REPLAY_COUNTER_LEN) <= 0) { 1758 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1759 "RSN: EAPOL-Key Replay Counter did not " 1760 "increase (STK) - dropping packet"); 1761 goto out; 1762 } else if (peerkey->initiator) { 1763 u8 _tmp[WPA_REPLAY_COUNTER_LEN]; 1764 os_memcpy(_tmp, key->replay_counter, 1765 WPA_REPLAY_COUNTER_LEN); 1766 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); 1767 if (os_memcmp(_tmp, peerkey->replay_counter, 1768 WPA_REPLAY_COUNTER_LEN) != 0) { 1769 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1770 "RSN: EAPOL-Key Replay " 1771 "Counter did not match (STK) - " 1772 "dropping packet"); 1773 goto out; 1774 } 1775 } 1776 } 1777 1778 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { 1779 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1780 "RSN: Ack bit in key_info from STK peer"); 1781 goto out; 1782 } 1783#endif /* CONFIG_PEERKEY */ 1784 1785 if (!peerkey && sm->rx_replay_counter_set && 1786 os_memcmp(key->replay_counter, sm->rx_replay_counter, 1787 WPA_REPLAY_COUNTER_LEN) <= 0) { 1788 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1789 "WPA: EAPOL-Key Replay Counter did not increase - " 1790 "dropping packet"); 1791 goto out; 1792 } 1793 1794 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) 1795#ifdef CONFIG_PEERKEY 1796 && (peerkey == NULL || !peerkey->initiator) 1797#endif /* CONFIG_PEERKEY */ 1798 ) { 1799 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1800 "WPA: No Ack bit in key_info"); 1801 goto out; 1802 } 1803 1804 if (key_info & WPA_KEY_INFO_REQUEST) { 1805 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1806 "WPA: EAPOL-Key with Request bit - dropped"); 1807 goto out; 1808 } 1809 1810 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && 1811 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 1812 goto out; 1813 1814#ifdef CONFIG_PEERKEY 1815 if ((key_info & WPA_KEY_INFO_MIC) && peerkey && 1816 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) 1817 goto out; 1818#endif /* CONFIG_PEERKEY */ 1819 1820 if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && 1821 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1822 if (wpa_supplicant_decrypt_key_data(sm, key, ver, key_data, 1823 &key_data_len)) 1824 goto out; 1825 } 1826 1827 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 1828 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 1829 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1830 "WPA: Ignored EAPOL-Key (Pairwise) with " 1831 "non-zero key index"); 1832 goto out; 1833 } 1834 if (peerkey) { 1835 /* PeerKey 4-Way Handshake */ 1836 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); 1837 } else if (key_info & WPA_KEY_INFO_MIC) { 1838 /* 3/4 4-Way Handshake */ 1839 wpa_supplicant_process_3_of_4(sm, key, ver, key_data, 1840 key_data_len); 1841 } else { 1842 /* 1/4 4-Way Handshake */ 1843 wpa_supplicant_process_1_of_4(sm, src_addr, key, 1844 ver, key_data, 1845 key_data_len); 1846 } 1847 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 1848 /* PeerKey SMK Handshake */ 1849 peerkey_rx_eapol_smk(sm, src_addr, key, key_data_len, key_info, 1850 ver); 1851 } else { 1852 if (key_info & WPA_KEY_INFO_MIC) { 1853 /* 1/2 Group Key Handshake */ 1854 wpa_supplicant_process_1_of_2(sm, src_addr, key, 1855 key_data, key_data_len, 1856 ver); 1857 } else { 1858 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1859 "WPA: EAPOL-Key (Group) without Mic bit - " 1860 "dropped"); 1861 } 1862 } 1863 1864 ret = 1; 1865 1866out: 1867 os_free(tmp); 1868 return ret; 1869} 1870 1871 1872#ifdef CONFIG_CTRL_IFACE 1873static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 1874{ 1875 switch (sm->key_mgmt) { 1876 case WPA_KEY_MGMT_IEEE8021X: 1877 return ((sm->proto == WPA_PROTO_RSN || 1878 sm->proto == WPA_PROTO_OSEN) ? 1879 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 1880 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 1881 case WPA_KEY_MGMT_PSK: 1882 return (sm->proto == WPA_PROTO_RSN ? 1883 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 1884 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 1885#ifdef CONFIG_IEEE80211R 1886 case WPA_KEY_MGMT_FT_IEEE8021X: 1887 return RSN_AUTH_KEY_MGMT_FT_802_1X; 1888 case WPA_KEY_MGMT_FT_PSK: 1889 return RSN_AUTH_KEY_MGMT_FT_PSK; 1890#endif /* CONFIG_IEEE80211R */ 1891#ifdef CONFIG_IEEE80211W 1892 case WPA_KEY_MGMT_IEEE8021X_SHA256: 1893 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 1894 case WPA_KEY_MGMT_PSK_SHA256: 1895 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 1896#endif /* CONFIG_IEEE80211W */ 1897 case WPA_KEY_MGMT_CCKM: 1898 return (sm->proto == WPA_PROTO_RSN ? 1899 RSN_AUTH_KEY_MGMT_CCKM: 1900 WPA_AUTH_KEY_MGMT_CCKM); 1901 case WPA_KEY_MGMT_WPA_NONE: 1902 return WPA_AUTH_KEY_MGMT_NONE; 1903 default: 1904 return 0; 1905 } 1906} 1907 1908 1909#define RSN_SUITE "%02x-%02x-%02x-%d" 1910#define RSN_SUITE_ARG(s) \ 1911((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 1912 1913/** 1914 * wpa_sm_get_mib - Dump text list of MIB entries 1915 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1916 * @buf: Buffer for the list 1917 * @buflen: Length of the buffer 1918 * Returns: Number of bytes written to buffer 1919 * 1920 * This function is used fetch dot11 MIB variables. 1921 */ 1922int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 1923{ 1924 char pmkid_txt[PMKID_LEN * 2 + 1]; 1925 int rsna, ret; 1926 size_t len; 1927 1928 if (sm->cur_pmksa) { 1929 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 1930 sm->cur_pmksa->pmkid, PMKID_LEN); 1931 } else 1932 pmkid_txt[0] = '\0'; 1933 1934 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 1935 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 1936 sm->proto == WPA_PROTO_RSN) 1937 rsna = 1; 1938 else 1939 rsna = 0; 1940 1941 ret = os_snprintf(buf, buflen, 1942 "dot11RSNAOptionImplemented=TRUE\n" 1943 "dot11RSNAPreauthenticationImplemented=TRUE\n" 1944 "dot11RSNAEnabled=%s\n" 1945 "dot11RSNAPreauthenticationEnabled=%s\n" 1946 "dot11RSNAConfigVersion=%d\n" 1947 "dot11RSNAConfigPairwiseKeysSupported=5\n" 1948 "dot11RSNAConfigGroupCipherSize=%d\n" 1949 "dot11RSNAConfigPMKLifetime=%d\n" 1950 "dot11RSNAConfigPMKReauthThreshold=%d\n" 1951 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 1952 "dot11RSNAConfigSATimeout=%d\n", 1953 rsna ? "TRUE" : "FALSE", 1954 rsna ? "TRUE" : "FALSE", 1955 RSN_VERSION, 1956 wpa_cipher_key_len(sm->group_cipher) * 8, 1957 sm->dot11RSNAConfigPMKLifetime, 1958 sm->dot11RSNAConfigPMKReauthThreshold, 1959 sm->dot11RSNAConfigSATimeout); 1960 if (ret < 0 || (size_t) ret >= buflen) 1961 return 0; 1962 len = ret; 1963 1964 ret = os_snprintf( 1965 buf + len, buflen - len, 1966 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 1967 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 1968 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 1969 "dot11RSNAPMKIDUsed=%s\n" 1970 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 1971 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 1972 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 1973 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 1974 "dot11RSNA4WayHandshakeFailures=%u\n", 1975 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1976 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1977 sm->pairwise_cipher)), 1978 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1979 sm->group_cipher)), 1980 pmkid_txt, 1981 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1982 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1983 sm->pairwise_cipher)), 1984 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1985 sm->group_cipher)), 1986 sm->dot11RSNA4WayHandshakeFailures); 1987 if (ret >= 0 && (size_t) ret < buflen) 1988 len += ret; 1989 1990 return (int) len; 1991} 1992#endif /* CONFIG_CTRL_IFACE */ 1993 1994 1995static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 1996 void *ctx, enum pmksa_free_reason reason) 1997{ 1998 struct wpa_sm *sm = ctx; 1999 int deauth = 0; 2000 2001 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " 2002 MACSTR " reason=%d", MAC2STR(entry->aa), reason); 2003 2004 if (sm->cur_pmksa == entry) { 2005 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2006 "RSN: %s current PMKSA entry", 2007 reason == PMKSA_REPLACE ? "replaced" : "removed"); 2008 pmksa_cache_clear_current(sm); 2009 2010 /* 2011 * If an entry is simply being replaced, there's no need to 2012 * deauthenticate because it will be immediately re-added. 2013 * This happens when EAP authentication is completed again 2014 * (reauth or failed PMKSA caching attempt). 2015 */ 2016 if (reason != PMKSA_REPLACE) 2017 deauth = 1; 2018 } 2019 2020 if (reason == PMKSA_EXPIRE && 2021 (sm->pmk_len == entry->pmk_len && 2022 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2023 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2024 "RSN: deauthenticating due to expired PMK"); 2025 pmksa_cache_clear_current(sm); 2026 deauth = 1; 2027 } 2028 2029 if (deauth) { 2030 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2031 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2032 } 2033} 2034 2035 2036/** 2037 * wpa_sm_init - Initialize WPA state machine 2038 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2039 * Returns: Pointer to the allocated WPA state machine data 2040 * 2041 * This function is used to allocate a new WPA state machine and the returned 2042 * value is passed to all WPA state machine calls. 2043 */ 2044struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2045{ 2046 struct wpa_sm *sm; 2047 2048 sm = os_zalloc(sizeof(*sm)); 2049 if (sm == NULL) 2050 return NULL; 2051 dl_list_init(&sm->pmksa_candidates); 2052 sm->renew_snonce = 1; 2053 sm->ctx = ctx; 2054 2055 sm->dot11RSNAConfigPMKLifetime = 43200; 2056 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2057 sm->dot11RSNAConfigSATimeout = 60; 2058 2059 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2060 if (sm->pmksa == NULL) { 2061 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2062 "RSN: PMKSA cache initialization failed"); 2063 os_free(sm); 2064 return NULL; 2065 } 2066 2067 return sm; 2068} 2069 2070 2071/** 2072 * wpa_sm_deinit - Deinitialize WPA state machine 2073 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2074 */ 2075void wpa_sm_deinit(struct wpa_sm *sm) 2076{ 2077 if (sm == NULL) 2078 return; 2079 pmksa_cache_deinit(sm->pmksa); 2080 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2081 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2082 os_free(sm->assoc_wpa_ie); 2083 os_free(sm->ap_wpa_ie); 2084 os_free(sm->ap_rsn_ie); 2085 os_free(sm->ctx); 2086 peerkey_deinit(sm); 2087#ifdef CONFIG_IEEE80211R 2088 os_free(sm->assoc_resp_ies); 2089#endif /* CONFIG_IEEE80211R */ 2090 os_free(sm); 2091} 2092 2093 2094/** 2095 * wpa_sm_notify_assoc - Notify WPA state machine about association 2096 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2097 * @bssid: The BSSID of the new association 2098 * 2099 * This function is called to let WPA state machine know that the connection 2100 * was established. 2101 */ 2102void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2103{ 2104 int clear_ptk = 1; 2105 2106 if (sm == NULL) 2107 return; 2108 2109 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2110 "WPA: Association event - clear replay counter"); 2111 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2112 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2113 sm->rx_replay_counter_set = 0; 2114 sm->renew_snonce = 1; 2115 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2116 rsn_preauth_deinit(sm); 2117 2118#ifdef CONFIG_IEEE80211R 2119 if (wpa_ft_is_completed(sm)) { 2120 /* 2121 * Clear portValid to kick EAPOL state machine to re-enter 2122 * AUTHENTICATED state to get the EAPOL port Authorized. 2123 */ 2124 eapol_sm_notify_portValid(sm->eapol, FALSE); 2125 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2126 2127 /* Prepare for the next transition */ 2128 wpa_ft_prepare_auth_request(sm, NULL); 2129 2130 clear_ptk = 0; 2131 } 2132#endif /* CONFIG_IEEE80211R */ 2133 2134 if (clear_ptk) { 2135 /* 2136 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2137 * this is not part of a Fast BSS Transition. 2138 */ 2139 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2140 sm->ptk_set = 0; 2141 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2142 sm->tptk_set = 0; 2143 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2144 } 2145 2146#ifdef CONFIG_TDLS 2147 wpa_tdls_assoc(sm); 2148#endif /* CONFIG_TDLS */ 2149 2150#ifdef CONFIG_P2P 2151 os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); 2152#endif /* CONFIG_P2P */ 2153} 2154 2155 2156/** 2157 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2158 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2159 * 2160 * This function is called to let WPA state machine know that the connection 2161 * was lost. This will abort any existing pre-authentication session. 2162 */ 2163void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2164{ 2165 peerkey_deinit(sm); 2166 rsn_preauth_deinit(sm); 2167 pmksa_cache_clear_current(sm); 2168 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2169 sm->dot11RSNA4WayHandshakeFailures++; 2170#ifdef CONFIG_TDLS 2171 wpa_tdls_disassoc(sm); 2172#endif /* CONFIG_TDLS */ 2173} 2174 2175 2176/** 2177 * wpa_sm_set_pmk - Set PMK 2178 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2179 * @pmk: The new PMK 2180 * @pmk_len: The length of the new PMK in bytes 2181 * 2182 * Configure the PMK for WPA state machine. 2183 */ 2184void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) 2185{ 2186 if (sm == NULL) 2187 return; 2188 2189 sm->pmk_len = pmk_len; 2190 os_memcpy(sm->pmk, pmk, pmk_len); 2191 2192#ifdef CONFIG_IEEE80211R 2193 /* Set XXKey to be PSK for FT key derivation */ 2194 sm->xxkey_len = pmk_len; 2195 os_memcpy(sm->xxkey, pmk, pmk_len); 2196#endif /* CONFIG_IEEE80211R */ 2197} 2198 2199 2200/** 2201 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2202 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2203 * 2204 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2205 * will be cleared. 2206 */ 2207void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2208{ 2209 if (sm == NULL) 2210 return; 2211 2212 if (sm->cur_pmksa) { 2213 sm->pmk_len = sm->cur_pmksa->pmk_len; 2214 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2215 } else { 2216 sm->pmk_len = PMK_LEN; 2217 os_memset(sm->pmk, 0, PMK_LEN); 2218 } 2219} 2220 2221 2222/** 2223 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2224 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2225 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2226 */ 2227void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2228{ 2229 if (sm) 2230 sm->fast_reauth = fast_reauth; 2231} 2232 2233 2234/** 2235 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2236 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2237 * @scard_ctx: Context pointer for smartcard related callback functions 2238 */ 2239void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2240{ 2241 if (sm == NULL) 2242 return; 2243 sm->scard_ctx = scard_ctx; 2244 if (sm->preauth_eapol) 2245 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2246} 2247 2248 2249/** 2250 * wpa_sm_set_config - Notification of current configration change 2251 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2252 * @config: Pointer to current network configuration 2253 * 2254 * Notify WPA state machine that configuration has changed. config will be 2255 * stored as a backpointer to network configuration. This can be %NULL to clear 2256 * the stored pointed. 2257 */ 2258void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2259{ 2260 if (!sm) 2261 return; 2262 2263 if (config) { 2264 sm->network_ctx = config->network_ctx; 2265 sm->peerkey_enabled = config->peerkey_enabled; 2266 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2267 sm->proactive_key_caching = config->proactive_key_caching; 2268 sm->eap_workaround = config->eap_workaround; 2269 sm->eap_conf_ctx = config->eap_conf_ctx; 2270 if (config->ssid) { 2271 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2272 sm->ssid_len = config->ssid_len; 2273 } else 2274 sm->ssid_len = 0; 2275 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2276 sm->p2p = config->p2p; 2277 } else { 2278 sm->network_ctx = NULL; 2279 sm->peerkey_enabled = 0; 2280 sm->allowed_pairwise_cipher = 0; 2281 sm->proactive_key_caching = 0; 2282 sm->eap_workaround = 0; 2283 sm->eap_conf_ctx = NULL; 2284 sm->ssid_len = 0; 2285 sm->wpa_ptk_rekey = 0; 2286 sm->p2p = 0; 2287 } 2288} 2289 2290 2291/** 2292 * wpa_sm_set_own_addr - Set own MAC address 2293 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2294 * @addr: Own MAC address 2295 */ 2296void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2297{ 2298 if (sm) 2299 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2300} 2301 2302 2303/** 2304 * wpa_sm_set_ifname - Set network interface name 2305 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2306 * @ifname: Interface name 2307 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2308 */ 2309void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2310 const char *bridge_ifname) 2311{ 2312 if (sm) { 2313 sm->ifname = ifname; 2314 sm->bridge_ifname = bridge_ifname; 2315 } 2316} 2317 2318 2319/** 2320 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2321 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2322 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2323 */ 2324void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2325{ 2326 if (sm) 2327 sm->eapol = eapol; 2328} 2329 2330 2331/** 2332 * wpa_sm_set_param - Set WPA state machine parameters 2333 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2334 * @param: Parameter field 2335 * @value: Parameter value 2336 * Returns: 0 on success, -1 on failure 2337 */ 2338int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2339 unsigned int value) 2340{ 2341 int ret = 0; 2342 2343 if (sm == NULL) 2344 return -1; 2345 2346 switch (param) { 2347 case RSNA_PMK_LIFETIME: 2348 if (value > 0) 2349 sm->dot11RSNAConfigPMKLifetime = value; 2350 else 2351 ret = -1; 2352 break; 2353 case RSNA_PMK_REAUTH_THRESHOLD: 2354 if (value > 0 && value <= 100) 2355 sm->dot11RSNAConfigPMKReauthThreshold = value; 2356 else 2357 ret = -1; 2358 break; 2359 case RSNA_SA_TIMEOUT: 2360 if (value > 0) 2361 sm->dot11RSNAConfigSATimeout = value; 2362 else 2363 ret = -1; 2364 break; 2365 case WPA_PARAM_PROTO: 2366 sm->proto = value; 2367 break; 2368 case WPA_PARAM_PAIRWISE: 2369 sm->pairwise_cipher = value; 2370 break; 2371 case WPA_PARAM_GROUP: 2372 sm->group_cipher = value; 2373 break; 2374 case WPA_PARAM_KEY_MGMT: 2375 sm->key_mgmt = value; 2376 break; 2377#ifdef CONFIG_IEEE80211W 2378 case WPA_PARAM_MGMT_GROUP: 2379 sm->mgmt_group_cipher = value; 2380 break; 2381#endif /* CONFIG_IEEE80211W */ 2382 case WPA_PARAM_RSN_ENABLED: 2383 sm->rsn_enabled = value; 2384 break; 2385 case WPA_PARAM_MFP: 2386 sm->mfp = value; 2387 break; 2388 default: 2389 break; 2390 } 2391 2392 return ret; 2393} 2394 2395 2396/** 2397 * wpa_sm_get_status - Get WPA state machine 2398 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2399 * @buf: Buffer for status information 2400 * @buflen: Maximum buffer length 2401 * @verbose: Whether to include verbose status information 2402 * Returns: Number of bytes written to buf. 2403 * 2404 * Query WPA state machine for status information. This function fills in 2405 * a text area with current status information. If the buffer (buf) is not 2406 * large enough, status information will be truncated to fit the buffer. 2407 */ 2408int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 2409 int verbose) 2410{ 2411 char *pos = buf, *end = buf + buflen; 2412 int ret; 2413 2414 ret = os_snprintf(pos, end - pos, 2415 "pairwise_cipher=%s\n" 2416 "group_cipher=%s\n" 2417 "key_mgmt=%s\n", 2418 wpa_cipher_txt(sm->pairwise_cipher), 2419 wpa_cipher_txt(sm->group_cipher), 2420 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 2421 if (ret < 0 || ret >= end - pos) 2422 return pos - buf; 2423 pos += ret; 2424 2425 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { 2426 struct wpa_ie_data rsn; 2427 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) 2428 >= 0 && 2429 rsn.capabilities & (WPA_CAPABILITY_MFPR | 2430 WPA_CAPABILITY_MFPC)) { 2431 ret = os_snprintf(pos, end - pos, "pmf=%d\n", 2432 (rsn.capabilities & 2433 WPA_CAPABILITY_MFPR) ? 2 : 1); 2434 if (ret < 0 || ret >= end - pos) 2435 return pos - buf; 2436 pos += ret; 2437 } 2438 } 2439 2440 return pos - buf; 2441} 2442 2443 2444int wpa_sm_pmf_enabled(struct wpa_sm *sm) 2445{ 2446 struct wpa_ie_data rsn; 2447 2448 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) 2449 return 0; 2450 2451 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && 2452 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) 2453 return 1; 2454 2455 return 0; 2456} 2457 2458 2459/** 2460 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration 2461 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2462 * @wpa_ie: Pointer to buffer for WPA/RSN IE 2463 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer 2464 * Returns: 0 on success, -1 on failure 2465 */ 2466int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, 2467 size_t *wpa_ie_len) 2468{ 2469 int res; 2470 2471 if (sm == NULL) 2472 return -1; 2473 2474 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); 2475 if (res < 0) 2476 return -1; 2477 *wpa_ie_len = res; 2478 2479 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", 2480 wpa_ie, *wpa_ie_len); 2481 2482 if (sm->assoc_wpa_ie == NULL) { 2483 /* 2484 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets 2485 * the correct version of the IE even if PMKSA caching is 2486 * aborted (which would remove PMKID from IE generation). 2487 */ 2488 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); 2489 if (sm->assoc_wpa_ie == NULL) 2490 return -1; 2491 2492 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); 2493 sm->assoc_wpa_ie_len = *wpa_ie_len; 2494 } 2495 2496 return 0; 2497} 2498 2499 2500/** 2501 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq 2502 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2503 * @ie: Pointer to IE data (starting from id) 2504 * @len: IE length 2505 * Returns: 0 on success, -1 on failure 2506 * 2507 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association 2508 * Request frame. The IE will be used to override the default value generated 2509 * with wpa_sm_set_assoc_wpa_ie_default(). 2510 */ 2511int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2512{ 2513 if (sm == NULL) 2514 return -1; 2515 2516 os_free(sm->assoc_wpa_ie); 2517 if (ie == NULL || len == 0) { 2518 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2519 "WPA: clearing own WPA/RSN IE"); 2520 sm->assoc_wpa_ie = NULL; 2521 sm->assoc_wpa_ie_len = 0; 2522 } else { 2523 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); 2524 sm->assoc_wpa_ie = os_malloc(len); 2525 if (sm->assoc_wpa_ie == NULL) 2526 return -1; 2527 2528 os_memcpy(sm->assoc_wpa_ie, ie, len); 2529 sm->assoc_wpa_ie_len = len; 2530 } 2531 2532 return 0; 2533} 2534 2535 2536/** 2537 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp 2538 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2539 * @ie: Pointer to IE data (starting from id) 2540 * @len: IE length 2541 * Returns: 0 on success, -1 on failure 2542 * 2543 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response 2544 * frame. 2545 */ 2546int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2547{ 2548 if (sm == NULL) 2549 return -1; 2550 2551 os_free(sm->ap_wpa_ie); 2552 if (ie == NULL || len == 0) { 2553 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2554 "WPA: clearing AP WPA IE"); 2555 sm->ap_wpa_ie = NULL; 2556 sm->ap_wpa_ie_len = 0; 2557 } else { 2558 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); 2559 sm->ap_wpa_ie = os_malloc(len); 2560 if (sm->ap_wpa_ie == NULL) 2561 return -1; 2562 2563 os_memcpy(sm->ap_wpa_ie, ie, len); 2564 sm->ap_wpa_ie_len = len; 2565 } 2566 2567 return 0; 2568} 2569 2570 2571/** 2572 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp 2573 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2574 * @ie: Pointer to IE data (starting from id) 2575 * @len: IE length 2576 * Returns: 0 on success, -1 on failure 2577 * 2578 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response 2579 * frame. 2580 */ 2581int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2582{ 2583 if (sm == NULL) 2584 return -1; 2585 2586 os_free(sm->ap_rsn_ie); 2587 if (ie == NULL || len == 0) { 2588 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2589 "WPA: clearing AP RSN IE"); 2590 sm->ap_rsn_ie = NULL; 2591 sm->ap_rsn_ie_len = 0; 2592 } else { 2593 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); 2594 sm->ap_rsn_ie = os_malloc(len); 2595 if (sm->ap_rsn_ie == NULL) 2596 return -1; 2597 2598 os_memcpy(sm->ap_rsn_ie, ie, len); 2599 sm->ap_rsn_ie_len = len; 2600 } 2601 2602 return 0; 2603} 2604 2605 2606/** 2607 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE 2608 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2609 * @data: Pointer to data area for parsing results 2610 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure 2611 * 2612 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the 2613 * parsed data into data. 2614 */ 2615int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) 2616{ 2617 if (sm == NULL) 2618 return -1; 2619 2620 if (sm->assoc_wpa_ie == NULL) { 2621 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2622 "WPA: No WPA/RSN IE available from association info"); 2623 return -1; 2624 } 2625 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) 2626 return -2; 2627 return 0; 2628} 2629 2630 2631int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) 2632{ 2633 return pmksa_cache_list(sm->pmksa, buf, len); 2634} 2635 2636 2637#ifdef CONFIG_TESTING_OPTIONS 2638void wpa_sm_drop_sa(struct wpa_sm *sm) 2639{ 2640 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 2641 sm->ptk_set = 0; 2642 sm->tptk_set = 0; 2643 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2644 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2645 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2646} 2647#endif /* CONFIG_TESTING_OPTIONS */ 2648 2649 2650int wpa_sm_has_ptk(struct wpa_sm *sm) 2651{ 2652 if (sm == NULL) 2653 return 0; 2654 return sm->ptk_set; 2655} 2656 2657 2658void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 2659{ 2660 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 2661} 2662 2663 2664void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 2665{ 2666 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); 2667} 2668 2669 2670#ifdef CONFIG_WNM 2671int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 2672{ 2673 u16 keyinfo; 2674 u8 keylen; /* plaintext key len */ 2675 u8 *key_rsc; 2676 2677 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 2678 struct wpa_gtk_data gd; 2679 2680 os_memset(&gd, 0, sizeof(gd)); 2681 keylen = wpa_cipher_key_len(sm->group_cipher); 2682 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); 2683 gd.alg = wpa_cipher_to_alg(sm->group_cipher); 2684 if (gd.alg == WPA_ALG_NONE) { 2685 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 2686 return -1; 2687 } 2688 2689 key_rsc = buf + 5; 2690 keyinfo = WPA_GET_LE16(buf + 2); 2691 gd.gtk_len = keylen; 2692 if (gd.gtk_len != buf[4]) { 2693 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 2694 gd.gtk_len, buf[4]); 2695 return -1; 2696 } 2697 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 2698 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 2699 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 2700 2701 os_memcpy(gd.gtk, buf + 13, gd.gtk_len); 2702 2703 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 2704 gd.gtk, gd.gtk_len); 2705 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { 2706 os_memset(&gd, 0, sizeof(gd)); 2707 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 2708 "WNM mode"); 2709 return -1; 2710 } 2711 os_memset(&gd, 0, sizeof(gd)); 2712#ifdef CONFIG_IEEE80211W 2713 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 2714 struct wpa_igtk_kde igd; 2715 u16 keyidx; 2716 2717 os_memset(&igd, 0, sizeof(igd)); 2718 keylen = wpa_cipher_key_len(sm->mgmt_group_cipher); 2719 os_memcpy(igd.keyid, buf + 2, 2); 2720 os_memcpy(igd.pn, buf + 4, 6); 2721 2722 keyidx = WPA_GET_LE16(igd.keyid); 2723 os_memcpy(igd.igtk, buf + 10, keylen); 2724 2725 wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", 2726 igd.igtk, keylen); 2727 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), 2728 broadcast_ether_addr, 2729 keyidx, 0, igd.pn, sizeof(igd.pn), 2730 igd.igtk, keylen) < 0) { 2731 wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " 2732 "WNM mode"); 2733 os_memset(&igd, 0, sizeof(igd)); 2734 return -1; 2735 } 2736 os_memset(&igd, 0, sizeof(igd)); 2737#endif /* CONFIG_IEEE80211W */ 2738 } else { 2739 wpa_printf(MSG_DEBUG, "Unknown element id"); 2740 return -1; 2741 } 2742 2743 return 0; 2744} 2745#endif /* CONFIG_WNM */ 2746 2747 2748#ifdef CONFIG_PEERKEY 2749int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr, 2750 const u8 *buf, size_t len) 2751{ 2752 struct wpa_peerkey *peerkey; 2753 2754 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 2755 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 2756 break; 2757 } 2758 2759 if (!peerkey) 2760 return 0; 2761 2762 wpa_sm_rx_eapol(sm, src_addr, buf, len); 2763 2764 return 1; 2765} 2766#endif /* CONFIG_PEERKEY */ 2767 2768 2769#ifdef CONFIG_P2P 2770 2771int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) 2772{ 2773 if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) 2774 return -1; 2775 os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); 2776 return 0; 2777} 2778 2779#endif /* CONFIG_P2P */ 2780