wpa.c revision 61593f02176862f4880ddefcb1f54cb5f5d9f043
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) 383{ 384 struct wpa_eapol_ie_parse ie; 385 struct wpa_ptk *ptk; 386 int res; 387 u8 *kde, *kde_buf = NULL; 388 size_t kde_len; 389 390 if (wpa_sm_get_network_ctx(sm) == NULL) { 391 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " 392 "found (msg 1 of 4)"); 393 return; 394 } 395 396 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 397 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " 398 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 399 400 os_memset(&ie, 0, sizeof(ie)); 401 402 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 403 /* RSN: msg 1/4 should contain PMKID for the selected PMK */ 404 const u8 *_buf = (const u8 *) (key + 1); 405 size_t len = WPA_GET_BE16(key->key_data_length); 406 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len); 407 if (wpa_supplicant_parse_ies(_buf, 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) 1072{ 1073 u16 key_info, keylen, len; 1074 const u8 *pos; 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 pos = (const u8 *) (key + 1); 1084 len = WPA_GET_BE16(key->key_data_length); 1085 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len); 1086 if (wpa_supplicant_parse_ies(pos, len, &ie) < 0) 1087 goto failed; 1088 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1089 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1090 "WPA: GTK IE in unencrypted key data"); 1091 goto failed; 1092 } 1093#ifdef CONFIG_IEEE80211W 1094 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1095 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1096 "WPA: IGTK KDE in unencrypted key data"); 1097 goto failed; 1098 } 1099 1100 if (ie.igtk && 1101 wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && 1102 ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + 1103 (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { 1104 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1105 "WPA: Invalid IGTK KDE length %lu", 1106 (unsigned long) ie.igtk_len); 1107 goto failed; 1108 } 1109#endif /* CONFIG_IEEE80211W */ 1110 1111 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1112 goto failed; 1113 1114 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1115 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1116 "WPA: ANonce from message 1 of 4-Way Handshake " 1117 "differs from 3 of 4-Way Handshake - drop packet (src=" 1118 MACSTR ")", MAC2STR(sm->bssid)); 1119 goto failed; 1120 } 1121 1122 keylen = WPA_GET_BE16(key->key_length); 1123 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { 1124 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1125 "WPA: Invalid %s key length %d (src=" MACSTR 1126 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, 1127 MAC2STR(sm->bssid)); 1128 goto failed; 1129 } 1130 1131#ifdef CONFIG_P2P 1132 if (ie.ip_addr_alloc) { 1133 os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); 1134 wpa_hexdump(MSG_DEBUG, "P2P: IP address info", 1135 sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); 1136 } 1137#endif /* CONFIG_P2P */ 1138 1139 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1140 &sm->ptk)) { 1141 goto failed; 1142 } 1143 1144 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1145 * for the next 4-Way Handshake. If msg 3 is received again, the old 1146 * SNonce will still be used to avoid changing PTK. */ 1147 sm->renew_snonce = 1; 1148 1149 if (key_info & WPA_KEY_INFO_INSTALL) { 1150 if (wpa_supplicant_install_ptk(sm, key)) 1151 goto failed; 1152 } 1153 1154 if (key_info & WPA_KEY_INFO_SECURE) { 1155 wpa_sm_mlme_setprotection( 1156 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1157 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1158 eapol_sm_notify_portValid(sm->eapol, TRUE); 1159 } 1160 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1161 1162 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { 1163 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1164 key_info & WPA_KEY_INFO_SECURE); 1165 } else if (ie.gtk && 1166 wpa_supplicant_pairwise_gtk(sm, key, 1167 ie.gtk, ie.gtk_len, key_info) < 0) { 1168 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1169 "RSN: Failed to configure GTK"); 1170 goto failed; 1171 } 1172 1173 if (ieee80211w_set_keys(sm, &ie) < 0) { 1174 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1175 "RSN: Failed to configure IGTK"); 1176 goto failed; 1177 } 1178 1179 if (ie.gtk) 1180 wpa_sm_set_rekey_offload(sm); 1181 1182 return; 1183 1184failed: 1185 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1186} 1187 1188 1189static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1190 const u8 *keydata, 1191 size_t keydatalen, 1192 u16 key_info, 1193 struct wpa_gtk_data *gd) 1194{ 1195 int maxkeylen; 1196 struct wpa_eapol_ie_parse ie; 1197 1198 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); 1199 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1200 return -1; 1201 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1202 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1203 "WPA: GTK IE in unencrypted key data"); 1204 return -1; 1205 } 1206 if (ie.gtk == NULL) { 1207 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1208 "WPA: No GTK IE in Group Key msg 1/2"); 1209 return -1; 1210 } 1211 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1212 1213 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1214 gd->gtk_len, maxkeylen, 1215 &gd->key_rsc_len, &gd->alg)) 1216 return -1; 1217 1218 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", 1219 ie.gtk, ie.gtk_len); 1220 gd->keyidx = ie.gtk[0] & 0x3; 1221 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1222 !!(ie.gtk[0] & BIT(2))); 1223 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1224 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1225 "RSN: Too long GTK in GTK IE (len=%lu)", 1226 (unsigned long) ie.gtk_len - 2); 1227 return -1; 1228 } 1229 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1230 1231 if (ieee80211w_set_keys(sm, &ie) < 0) 1232 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1233 "RSN: Failed to configure IGTK"); 1234 1235 return 0; 1236} 1237 1238 1239static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1240 const struct wpa_eapol_key *key, 1241 size_t keydatalen, int key_info, 1242 size_t extra_len, u16 ver, 1243 struct wpa_gtk_data *gd) 1244{ 1245 size_t maxkeylen; 1246 1247 gd->gtk_len = WPA_GET_BE16(key->key_length); 1248 maxkeylen = keydatalen; 1249 if (keydatalen > extra_len) { 1250 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1251 "WPA: Truncated EAPOL-Key packet: " 1252 "key_data_length=%lu > extra_len=%lu", 1253 (unsigned long) keydatalen, (unsigned long) extra_len); 1254 return -1; 1255 } 1256 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1257 if (maxkeylen < 8) { 1258 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1259 "WPA: Too short maxkeylen (%lu)", 1260 (unsigned long) maxkeylen); 1261 return -1; 1262 } 1263 maxkeylen -= 8; 1264 } 1265 1266 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1267 gd->gtk_len, maxkeylen, 1268 &gd->key_rsc_len, &gd->alg)) 1269 return -1; 1270 1271 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1272 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1273 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1274 u8 ek[32]; 1275 if (keydatalen > sizeof(gd->gtk)) { 1276 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1277 "WPA: RC4 key data too long (%lu)", 1278 (unsigned long) keydatalen); 1279 return -1; 1280 } 1281 os_memcpy(ek, key->key_iv, 16); 1282 os_memcpy(ek + 16, sm->ptk.kek, 16); 1283 os_memcpy(gd->gtk, key + 1, keydatalen); 1284 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { 1285 os_memset(ek, 0, sizeof(ek)); 1286 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1287 "WPA: RC4 failed"); 1288 return -1; 1289 } 1290 os_memset(ek, 0, sizeof(ek)); 1291 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1292 if (keydatalen % 8) { 1293 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1294 "WPA: Unsupported AES-WRAP len %lu", 1295 (unsigned long) keydatalen); 1296 return -1; 1297 } 1298 if (maxkeylen > sizeof(gd->gtk)) { 1299 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1300 "WPA: AES-WRAP key data " 1301 "too long (keydatalen=%lu maxkeylen=%lu)", 1302 (unsigned long) keydatalen, 1303 (unsigned long) maxkeylen); 1304 return -1; 1305 } 1306 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, 1307 (const u8 *) (key + 1), gd->gtk)) { 1308 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1309 "WPA: AES unwrap failed - could not decrypt " 1310 "GTK"); 1311 return -1; 1312 } 1313 } else { 1314 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1315 "WPA: Unsupported key_info type %d", ver); 1316 return -1; 1317 } 1318 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1319 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1320 return 0; 1321} 1322 1323 1324static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1325 const struct wpa_eapol_key *key, 1326 int ver, u16 key_info) 1327{ 1328 size_t rlen; 1329 struct wpa_eapol_key *reply; 1330 u8 *rbuf; 1331 1332 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1333 sizeof(*reply), &rlen, (void *) &reply); 1334 if (rbuf == NULL) 1335 return -1; 1336 1337 reply->type = (sm->proto == WPA_PROTO_RSN || 1338 sm->proto == WPA_PROTO_OSEN) ? 1339 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1340 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1341 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; 1342 WPA_PUT_BE16(reply->key_info, key_info); 1343 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1344 WPA_PUT_BE16(reply->key_length, 0); 1345 else 1346 os_memcpy(reply->key_length, key->key_length, 2); 1347 os_memcpy(reply->replay_counter, key->replay_counter, 1348 WPA_REPLAY_COUNTER_LEN); 1349 1350 WPA_PUT_BE16(reply->key_data_length, 0); 1351 1352 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1353 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, 1354 rbuf, rlen, reply->key_mic); 1355 1356 return 0; 1357} 1358 1359 1360static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1361 const unsigned char *src_addr, 1362 const struct wpa_eapol_key *key, 1363 int extra_len, u16 ver) 1364{ 1365 u16 key_info, keydatalen; 1366 int rekey, ret; 1367 struct wpa_gtk_data gd; 1368 1369 os_memset(&gd, 0, sizeof(gd)); 1370 1371 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1372 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1373 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1374 1375 key_info = WPA_GET_BE16(key->key_info); 1376 keydatalen = WPA_GET_BE16(key->key_data_length); 1377 1378 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 1379 ret = wpa_supplicant_process_1_of_2_rsn(sm, 1380 (const u8 *) (key + 1), 1381 keydatalen, key_info, 1382 &gd); 1383 } else { 1384 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, 1385 key_info, extra_len, 1386 ver, &gd); 1387 } 1388 1389 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1390 1391 if (ret) 1392 goto failed; 1393 1394 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || 1395 wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) 1396 goto failed; 1397 1398 if (rekey) { 1399 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " 1400 "completed with " MACSTR " [GTK=%s]", 1401 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1402 wpa_sm_cancel_auth_timeout(sm); 1403 wpa_sm_set_state(sm, WPA_COMPLETED); 1404 } else { 1405 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1406 key_info & 1407 WPA_KEY_INFO_SECURE); 1408 } 1409 1410 wpa_sm_set_rekey_offload(sm); 1411 1412 return; 1413 1414failed: 1415 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1416} 1417 1418 1419static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1420 struct wpa_eapol_key *key, 1421 u16 ver, 1422 const u8 *buf, size_t len) 1423{ 1424 u8 mic[16]; 1425 int ok = 0; 1426 1427 os_memcpy(mic, key->key_mic, 16); 1428 if (sm->tptk_set) { 1429 os_memset(key->key_mic, 0, 16); 1430 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, 1431 key->key_mic); 1432 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1433 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1434 "WPA: Invalid EAPOL-Key MIC " 1435 "when using TPTK - ignoring TPTK"); 1436 } else { 1437 ok = 1; 1438 sm->tptk_set = 0; 1439 sm->ptk_set = 1; 1440 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1441 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 1442 } 1443 } 1444 1445 if (!ok && sm->ptk_set) { 1446 os_memset(key->key_mic, 0, 16); 1447 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len, 1448 key->key_mic); 1449 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1450 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1451 "WPA: Invalid EAPOL-Key MIC - " 1452 "dropping packet"); 1453 return -1; 1454 } 1455 ok = 1; 1456 } 1457 1458 if (!ok) { 1459 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1460 "WPA: Could not verify EAPOL-Key MIC - " 1461 "dropping packet"); 1462 return -1; 1463 } 1464 1465 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1466 WPA_REPLAY_COUNTER_LEN); 1467 sm->rx_replay_counter_set = 1; 1468 return 0; 1469} 1470 1471 1472/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ 1473static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, 1474 struct wpa_eapol_key *key, u16 ver) 1475{ 1476 u16 keydatalen = WPA_GET_BE16(key->key_data_length); 1477 1478 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", 1479 (u8 *) (key + 1), keydatalen); 1480 if (!sm->ptk_set) { 1481 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1482 "WPA: PTK not available, cannot decrypt EAPOL-Key Key " 1483 "Data"); 1484 return -1; 1485 } 1486 1487 /* Decrypt key data here so that this operation does not need 1488 * to be implemented separately for each message type. */ 1489 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1490 u8 ek[32]; 1491 os_memcpy(ek, key->key_iv, 16); 1492 os_memcpy(ek + 16, sm->ptk.kek, 16); 1493 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) { 1494 os_memset(ek, 0, sizeof(ek)); 1495 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1496 "WPA: RC4 failed"); 1497 return -1; 1498 } 1499 os_memset(ek, 0, sizeof(ek)); 1500 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1501 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || 1502 sm->key_mgmt == WPA_KEY_MGMT_OSEN) { 1503 u8 *buf; 1504 if (keydatalen % 8) { 1505 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1506 "WPA: Unsupported AES-WRAP len %d", 1507 keydatalen); 1508 return -1; 1509 } 1510 keydatalen -= 8; /* AES-WRAP adds 8 bytes */ 1511 buf = os_malloc(keydatalen); 1512 if (buf == NULL) { 1513 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1514 "WPA: No memory for AES-UNWRAP buffer"); 1515 return -1; 1516 } 1517 if (aes_unwrap(sm->ptk.kek, keydatalen / 8, 1518 (u8 *) (key + 1), buf)) { 1519 os_free(buf); 1520 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1521 "WPA: AES unwrap failed - " 1522 "could not decrypt EAPOL-Key key data"); 1523 return -1; 1524 } 1525 os_memcpy(key + 1, buf, keydatalen); 1526 os_free(buf); 1527 WPA_PUT_BE16(key->key_data_length, keydatalen); 1528 } else { 1529 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1530 "WPA: Unsupported key_info type %d", ver); 1531 return -1; 1532 } 1533 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 1534 (u8 *) (key + 1), keydatalen); 1535 return 0; 1536} 1537 1538 1539/** 1540 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 1541 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1542 */ 1543void wpa_sm_aborted_cached(struct wpa_sm *sm) 1544{ 1545 if (sm && sm->cur_pmksa) { 1546 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1547 "RSN: Cancelling PMKSA caching attempt"); 1548 sm->cur_pmksa = NULL; 1549 } 1550} 1551 1552 1553static void wpa_eapol_key_dump(struct wpa_sm *sm, 1554 const struct wpa_eapol_key *key) 1555{ 1556#ifndef CONFIG_NO_STDOUT_DEBUG 1557 u16 key_info = WPA_GET_BE16(key->key_info); 1558 1559 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 1560 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1561 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 1562 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 1563 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1564 WPA_KEY_INFO_KEY_INDEX_SHIFT, 1565 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 1566 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 1567 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 1568 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 1569 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 1570 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 1571 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 1572 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 1573 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 1574 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1575 " key_length=%u key_data_length=%u", 1576 WPA_GET_BE16(key->key_length), 1577 WPA_GET_BE16(key->key_data_length)); 1578 wpa_hexdump(MSG_DEBUG, " replay_counter", 1579 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 1580 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 1581 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 1582 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 1583 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 1584 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); 1585#endif /* CONFIG_NO_STDOUT_DEBUG */ 1586} 1587 1588 1589/** 1590 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 1591 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1592 * @src_addr: Source MAC address of the EAPOL packet 1593 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 1594 * @len: Length of the EAPOL frame 1595 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 1596 * 1597 * This function is called for each received EAPOL frame. Other than EAPOL-Key 1598 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 1599 * only processing WPA and WPA2 EAPOL-Key frames. 1600 * 1601 * The received EAPOL-Key packets are validated and valid packets are replied 1602 * to. In addition, key material (PTK, GTK) is configured at the end of a 1603 * successful key handshake. 1604 */ 1605int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 1606 const u8 *buf, size_t len) 1607{ 1608 size_t plen, data_len, extra_len; 1609 struct ieee802_1x_hdr *hdr; 1610 struct wpa_eapol_key *key; 1611 u16 key_info, ver; 1612 u8 *tmp; 1613 int ret = -1; 1614 struct wpa_peerkey *peerkey = NULL; 1615 1616#ifdef CONFIG_IEEE80211R 1617 sm->ft_completed = 0; 1618#endif /* CONFIG_IEEE80211R */ 1619 1620 if (len < sizeof(*hdr) + sizeof(*key)) { 1621 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1622 "WPA: EAPOL frame too short to be a WPA " 1623 "EAPOL-Key (len %lu, expecting at least %lu)", 1624 (unsigned long) len, 1625 (unsigned long) sizeof(*hdr) + sizeof(*key)); 1626 return 0; 1627 } 1628 1629 tmp = os_malloc(len); 1630 if (tmp == NULL) 1631 return -1; 1632 os_memcpy(tmp, buf, len); 1633 1634 hdr = (struct ieee802_1x_hdr *) tmp; 1635 key = (struct wpa_eapol_key *) (hdr + 1); 1636 plen = be_to_host16(hdr->length); 1637 data_len = plen + sizeof(*hdr); 1638 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1639 "IEEE 802.1X RX: version=%d type=%d length=%lu", 1640 hdr->version, hdr->type, (unsigned long) plen); 1641 1642 if (hdr->version < EAPOL_VERSION) { 1643 /* TODO: backwards compatibility */ 1644 } 1645 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 1646 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1647 "WPA: EAPOL frame (type %u) discarded, " 1648 "not a Key frame", hdr->type); 1649 ret = 0; 1650 goto out; 1651 } 1652 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { 1653 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1654 "WPA: EAPOL frame payload size %lu " 1655 "invalid (frame size %lu)", 1656 (unsigned long) plen, (unsigned long) len); 1657 ret = 0; 1658 goto out; 1659 } 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 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 1672 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len); 1673 if (data_len < len) { 1674 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1675 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 1676 (unsigned long) len - data_len); 1677 } 1678 key_info = WPA_GET_BE16(key->key_info); 1679 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 1680 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 1681#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 1682 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1683#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 1684 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && 1685 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1686 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1687 "WPA: Unsupported EAPOL-Key descriptor version %d", 1688 ver); 1689 goto out; 1690 } 1691 1692 if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && 1693 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { 1694 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1695 "OSEN: Unsupported EAPOL-Key descriptor version %d", 1696 ver); 1697 goto out; 1698 } 1699 1700#ifdef CONFIG_IEEE80211R 1701 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 1702 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 1703 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1704 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1705 "FT: AP did not use AES-128-CMAC"); 1706 goto out; 1707 } 1708 } else 1709#endif /* CONFIG_IEEE80211R */ 1710#ifdef CONFIG_IEEE80211W 1711 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 1712 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1713 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1714 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1715 "WPA: AP did not use the " 1716 "negotiated AES-128-CMAC"); 1717 goto out; 1718 } 1719 } else 1720#endif /* CONFIG_IEEE80211W */ 1721 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 1722 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1723 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1724 "WPA: CCMP is used, but EAPOL-Key " 1725 "descriptor version (%d) is not 2", ver); 1726 if (sm->group_cipher != WPA_CIPHER_CCMP && 1727 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 1728 /* Earlier versions of IEEE 802.11i did not explicitly 1729 * require version 2 descriptor for all EAPOL-Key 1730 * packets, so allow group keys to use version 1 if 1731 * CCMP is not used for them. */ 1732 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1733 "WPA: Backwards compatibility: allow invalid " 1734 "version for non-CCMP group keys"); 1735 } else 1736 goto out; 1737 } 1738 if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 1739 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1740 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1741 "WPA: GCMP is used, but EAPOL-Key " 1742 "descriptor version (%d) is not 2", ver); 1743 goto out; 1744 } 1745 1746#ifdef CONFIG_PEERKEY 1747 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 1748 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 1749 break; 1750 } 1751 1752 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { 1753 if (!peerkey->initiator && peerkey->replay_counter_set && 1754 os_memcmp(key->replay_counter, peerkey->replay_counter, 1755 WPA_REPLAY_COUNTER_LEN) <= 0) { 1756 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1757 "RSN: EAPOL-Key Replay Counter did not " 1758 "increase (STK) - dropping packet"); 1759 goto out; 1760 } else if (peerkey->initiator) { 1761 u8 _tmp[WPA_REPLAY_COUNTER_LEN]; 1762 os_memcpy(_tmp, key->replay_counter, 1763 WPA_REPLAY_COUNTER_LEN); 1764 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); 1765 if (os_memcmp(_tmp, peerkey->replay_counter, 1766 WPA_REPLAY_COUNTER_LEN) != 0) { 1767 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1768 "RSN: EAPOL-Key Replay " 1769 "Counter did not match (STK) - " 1770 "dropping packet"); 1771 goto out; 1772 } 1773 } 1774 } 1775 1776 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { 1777 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1778 "RSN: Ack bit in key_info from STK peer"); 1779 goto out; 1780 } 1781#endif /* CONFIG_PEERKEY */ 1782 1783 if (!peerkey && sm->rx_replay_counter_set && 1784 os_memcmp(key->replay_counter, sm->rx_replay_counter, 1785 WPA_REPLAY_COUNTER_LEN) <= 0) { 1786 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1787 "WPA: EAPOL-Key Replay Counter did not increase - " 1788 "dropping packet"); 1789 goto out; 1790 } 1791 1792 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) 1793#ifdef CONFIG_PEERKEY 1794 && (peerkey == NULL || !peerkey->initiator) 1795#endif /* CONFIG_PEERKEY */ 1796 ) { 1797 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1798 "WPA: No Ack bit in key_info"); 1799 goto out; 1800 } 1801 1802 if (key_info & WPA_KEY_INFO_REQUEST) { 1803 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1804 "WPA: EAPOL-Key with Request bit - dropped"); 1805 goto out; 1806 } 1807 1808 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && 1809 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 1810 goto out; 1811 1812#ifdef CONFIG_PEERKEY 1813 if ((key_info & WPA_KEY_INFO_MIC) && peerkey && 1814 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) 1815 goto out; 1816#endif /* CONFIG_PEERKEY */ 1817 1818 extra_len = data_len - sizeof(*hdr) - sizeof(*key); 1819 1820 if (WPA_GET_BE16(key->key_data_length) > extra_len) { 1821 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 1822 "frame - key_data overflow (%d > %lu)", 1823 WPA_GET_BE16(key->key_data_length), 1824 (unsigned long) extra_len); 1825 goto out; 1826 } 1827 extra_len = WPA_GET_BE16(key->key_data_length); 1828 1829 if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && 1830 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1831 if (wpa_supplicant_decrypt_key_data(sm, key, ver)) 1832 goto out; 1833 extra_len = WPA_GET_BE16(key->key_data_length); 1834 } 1835 1836 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 1837 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 1838 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1839 "WPA: Ignored EAPOL-Key (Pairwise) with " 1840 "non-zero key index"); 1841 goto out; 1842 } 1843 if (peerkey) { 1844 /* PeerKey 4-Way Handshake */ 1845 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); 1846 } else if (key_info & WPA_KEY_INFO_MIC) { 1847 /* 3/4 4-Way Handshake */ 1848 wpa_supplicant_process_3_of_4(sm, key, ver); 1849 } else { 1850 /* 1/4 4-Way Handshake */ 1851 wpa_supplicant_process_1_of_4(sm, src_addr, key, 1852 ver); 1853 } 1854 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 1855 /* PeerKey SMK Handshake */ 1856 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info, 1857 ver); 1858 } else { 1859 if (key_info & WPA_KEY_INFO_MIC) { 1860 /* 1/2 Group Key Handshake */ 1861 wpa_supplicant_process_1_of_2(sm, src_addr, key, 1862 extra_len, ver); 1863 } else { 1864 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1865 "WPA: EAPOL-Key (Group) without Mic bit - " 1866 "dropped"); 1867 } 1868 } 1869 1870 ret = 1; 1871 1872out: 1873 os_free(tmp); 1874 return ret; 1875} 1876 1877 1878#ifdef CONFIG_CTRL_IFACE 1879static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 1880{ 1881 switch (sm->key_mgmt) { 1882 case WPA_KEY_MGMT_IEEE8021X: 1883 return ((sm->proto == WPA_PROTO_RSN || 1884 sm->proto == WPA_PROTO_OSEN) ? 1885 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 1886 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 1887 case WPA_KEY_MGMT_PSK: 1888 return (sm->proto == WPA_PROTO_RSN ? 1889 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 1890 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 1891#ifdef CONFIG_IEEE80211R 1892 case WPA_KEY_MGMT_FT_IEEE8021X: 1893 return RSN_AUTH_KEY_MGMT_FT_802_1X; 1894 case WPA_KEY_MGMT_FT_PSK: 1895 return RSN_AUTH_KEY_MGMT_FT_PSK; 1896#endif /* CONFIG_IEEE80211R */ 1897#ifdef CONFIG_IEEE80211W 1898 case WPA_KEY_MGMT_IEEE8021X_SHA256: 1899 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 1900 case WPA_KEY_MGMT_PSK_SHA256: 1901 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 1902#endif /* CONFIG_IEEE80211W */ 1903 case WPA_KEY_MGMT_CCKM: 1904 return (sm->proto == WPA_PROTO_RSN ? 1905 RSN_AUTH_KEY_MGMT_CCKM: 1906 WPA_AUTH_KEY_MGMT_CCKM); 1907 case WPA_KEY_MGMT_WPA_NONE: 1908 return WPA_AUTH_KEY_MGMT_NONE; 1909 default: 1910 return 0; 1911 } 1912} 1913 1914 1915#define RSN_SUITE "%02x-%02x-%02x-%d" 1916#define RSN_SUITE_ARG(s) \ 1917((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 1918 1919/** 1920 * wpa_sm_get_mib - Dump text list of MIB entries 1921 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1922 * @buf: Buffer for the list 1923 * @buflen: Length of the buffer 1924 * Returns: Number of bytes written to buffer 1925 * 1926 * This function is used fetch dot11 MIB variables. 1927 */ 1928int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 1929{ 1930 char pmkid_txt[PMKID_LEN * 2 + 1]; 1931 int rsna, ret; 1932 size_t len; 1933 1934 if (sm->cur_pmksa) { 1935 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 1936 sm->cur_pmksa->pmkid, PMKID_LEN); 1937 } else 1938 pmkid_txt[0] = '\0'; 1939 1940 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 1941 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 1942 sm->proto == WPA_PROTO_RSN) 1943 rsna = 1; 1944 else 1945 rsna = 0; 1946 1947 ret = os_snprintf(buf, buflen, 1948 "dot11RSNAOptionImplemented=TRUE\n" 1949 "dot11RSNAPreauthenticationImplemented=TRUE\n" 1950 "dot11RSNAEnabled=%s\n" 1951 "dot11RSNAPreauthenticationEnabled=%s\n" 1952 "dot11RSNAConfigVersion=%d\n" 1953 "dot11RSNAConfigPairwiseKeysSupported=5\n" 1954 "dot11RSNAConfigGroupCipherSize=%d\n" 1955 "dot11RSNAConfigPMKLifetime=%d\n" 1956 "dot11RSNAConfigPMKReauthThreshold=%d\n" 1957 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 1958 "dot11RSNAConfigSATimeout=%d\n", 1959 rsna ? "TRUE" : "FALSE", 1960 rsna ? "TRUE" : "FALSE", 1961 RSN_VERSION, 1962 wpa_cipher_key_len(sm->group_cipher) * 8, 1963 sm->dot11RSNAConfigPMKLifetime, 1964 sm->dot11RSNAConfigPMKReauthThreshold, 1965 sm->dot11RSNAConfigSATimeout); 1966 if (ret < 0 || (size_t) ret >= buflen) 1967 return 0; 1968 len = ret; 1969 1970 ret = os_snprintf( 1971 buf + len, buflen - len, 1972 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 1973 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 1974 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 1975 "dot11RSNAPMKIDUsed=%s\n" 1976 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 1977 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 1978 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 1979 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 1980 "dot11RSNA4WayHandshakeFailures=%u\n", 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 pmkid_txt, 1987 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1988 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1989 sm->pairwise_cipher)), 1990 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1991 sm->group_cipher)), 1992 sm->dot11RSNA4WayHandshakeFailures); 1993 if (ret >= 0 && (size_t) ret < buflen) 1994 len += ret; 1995 1996 return (int) len; 1997} 1998#endif /* CONFIG_CTRL_IFACE */ 1999 2000 2001static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 2002 void *ctx, enum pmksa_free_reason reason) 2003{ 2004 struct wpa_sm *sm = ctx; 2005 int deauth = 0; 2006 2007 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " 2008 MACSTR " reason=%d", MAC2STR(entry->aa), reason); 2009 2010 if (sm->cur_pmksa == entry) { 2011 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2012 "RSN: %s current PMKSA entry", 2013 reason == PMKSA_REPLACE ? "replaced" : "removed"); 2014 pmksa_cache_clear_current(sm); 2015 2016 /* 2017 * If an entry is simply being replaced, there's no need to 2018 * deauthenticate because it will be immediately re-added. 2019 * This happens when EAP authentication is completed again 2020 * (reauth or failed PMKSA caching attempt). 2021 */ 2022 if (reason != PMKSA_REPLACE) 2023 deauth = 1; 2024 } 2025 2026 if (reason == PMKSA_EXPIRE && 2027 (sm->pmk_len == entry->pmk_len && 2028 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2029 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2030 "RSN: deauthenticating due to expired PMK"); 2031 pmksa_cache_clear_current(sm); 2032 deauth = 1; 2033 } 2034 2035 if (deauth) { 2036 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2037 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2038 } 2039} 2040 2041 2042/** 2043 * wpa_sm_init - Initialize WPA state machine 2044 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2045 * Returns: Pointer to the allocated WPA state machine data 2046 * 2047 * This function is used to allocate a new WPA state machine and the returned 2048 * value is passed to all WPA state machine calls. 2049 */ 2050struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2051{ 2052 struct wpa_sm *sm; 2053 2054 sm = os_zalloc(sizeof(*sm)); 2055 if (sm == NULL) 2056 return NULL; 2057 dl_list_init(&sm->pmksa_candidates); 2058 sm->renew_snonce = 1; 2059 sm->ctx = ctx; 2060 2061 sm->dot11RSNAConfigPMKLifetime = 43200; 2062 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2063 sm->dot11RSNAConfigSATimeout = 60; 2064 2065 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2066 if (sm->pmksa == NULL) { 2067 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2068 "RSN: PMKSA cache initialization failed"); 2069 os_free(sm); 2070 return NULL; 2071 } 2072 2073 return sm; 2074} 2075 2076 2077/** 2078 * wpa_sm_deinit - Deinitialize WPA state machine 2079 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2080 */ 2081void wpa_sm_deinit(struct wpa_sm *sm) 2082{ 2083 if (sm == NULL) 2084 return; 2085 pmksa_cache_deinit(sm->pmksa); 2086 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2087 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2088 os_free(sm->assoc_wpa_ie); 2089 os_free(sm->ap_wpa_ie); 2090 os_free(sm->ap_rsn_ie); 2091 os_free(sm->ctx); 2092 peerkey_deinit(sm); 2093#ifdef CONFIG_IEEE80211R 2094 os_free(sm->assoc_resp_ies); 2095#endif /* CONFIG_IEEE80211R */ 2096 os_free(sm); 2097} 2098 2099 2100/** 2101 * wpa_sm_notify_assoc - Notify WPA state machine about association 2102 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2103 * @bssid: The BSSID of the new association 2104 * 2105 * This function is called to let WPA state machine know that the connection 2106 * was established. 2107 */ 2108void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2109{ 2110 int clear_ptk = 1; 2111 2112 if (sm == NULL) 2113 return; 2114 2115 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2116 "WPA: Association event - clear replay counter"); 2117 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2118 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2119 sm->rx_replay_counter_set = 0; 2120 sm->renew_snonce = 1; 2121 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2122 rsn_preauth_deinit(sm); 2123 2124#ifdef CONFIG_IEEE80211R 2125 if (wpa_ft_is_completed(sm)) { 2126 /* 2127 * Clear portValid to kick EAPOL state machine to re-enter 2128 * AUTHENTICATED state to get the EAPOL port Authorized. 2129 */ 2130 eapol_sm_notify_portValid(sm->eapol, FALSE); 2131 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2132 2133 /* Prepare for the next transition */ 2134 wpa_ft_prepare_auth_request(sm, NULL); 2135 2136 clear_ptk = 0; 2137 } 2138#endif /* CONFIG_IEEE80211R */ 2139 2140 if (clear_ptk) { 2141 /* 2142 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2143 * this is not part of a Fast BSS Transition. 2144 */ 2145 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2146 sm->ptk_set = 0; 2147 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2148 sm->tptk_set = 0; 2149 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2150 } 2151 2152#ifdef CONFIG_TDLS 2153 wpa_tdls_assoc(sm); 2154#endif /* CONFIG_TDLS */ 2155 2156#ifdef CONFIG_P2P 2157 os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); 2158#endif /* CONFIG_P2P */ 2159} 2160 2161 2162/** 2163 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2164 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2165 * 2166 * This function is called to let WPA state machine know that the connection 2167 * was lost. This will abort any existing pre-authentication session. 2168 */ 2169void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2170{ 2171 peerkey_deinit(sm); 2172 rsn_preauth_deinit(sm); 2173 pmksa_cache_clear_current(sm); 2174 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2175 sm->dot11RSNA4WayHandshakeFailures++; 2176#ifdef CONFIG_TDLS 2177 wpa_tdls_disassoc(sm); 2178#endif /* CONFIG_TDLS */ 2179} 2180 2181 2182/** 2183 * wpa_sm_set_pmk - Set PMK 2184 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2185 * @pmk: The new PMK 2186 * @pmk_len: The length of the new PMK in bytes 2187 * 2188 * Configure the PMK for WPA state machine. 2189 */ 2190void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) 2191{ 2192 if (sm == NULL) 2193 return; 2194 2195 sm->pmk_len = pmk_len; 2196 os_memcpy(sm->pmk, pmk, pmk_len); 2197 2198#ifdef CONFIG_IEEE80211R 2199 /* Set XXKey to be PSK for FT key derivation */ 2200 sm->xxkey_len = pmk_len; 2201 os_memcpy(sm->xxkey, pmk, pmk_len); 2202#endif /* CONFIG_IEEE80211R */ 2203} 2204 2205 2206/** 2207 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2208 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2209 * 2210 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2211 * will be cleared. 2212 */ 2213void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2214{ 2215 if (sm == NULL) 2216 return; 2217 2218 if (sm->cur_pmksa) { 2219 sm->pmk_len = sm->cur_pmksa->pmk_len; 2220 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2221 } else { 2222 sm->pmk_len = PMK_LEN; 2223 os_memset(sm->pmk, 0, PMK_LEN); 2224 } 2225} 2226 2227 2228/** 2229 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2230 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2231 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2232 */ 2233void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2234{ 2235 if (sm) 2236 sm->fast_reauth = fast_reauth; 2237} 2238 2239 2240/** 2241 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2242 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2243 * @scard_ctx: Context pointer for smartcard related callback functions 2244 */ 2245void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2246{ 2247 if (sm == NULL) 2248 return; 2249 sm->scard_ctx = scard_ctx; 2250 if (sm->preauth_eapol) 2251 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2252} 2253 2254 2255/** 2256 * wpa_sm_set_config - Notification of current configration change 2257 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2258 * @config: Pointer to current network configuration 2259 * 2260 * Notify WPA state machine that configuration has changed. config will be 2261 * stored as a backpointer to network configuration. This can be %NULL to clear 2262 * the stored pointed. 2263 */ 2264void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2265{ 2266 if (!sm) 2267 return; 2268 2269 if (config) { 2270 sm->network_ctx = config->network_ctx; 2271 sm->peerkey_enabled = config->peerkey_enabled; 2272 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2273 sm->proactive_key_caching = config->proactive_key_caching; 2274 sm->eap_workaround = config->eap_workaround; 2275 sm->eap_conf_ctx = config->eap_conf_ctx; 2276 if (config->ssid) { 2277 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2278 sm->ssid_len = config->ssid_len; 2279 } else 2280 sm->ssid_len = 0; 2281 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2282 sm->p2p = config->p2p; 2283 } else { 2284 sm->network_ctx = NULL; 2285 sm->peerkey_enabled = 0; 2286 sm->allowed_pairwise_cipher = 0; 2287 sm->proactive_key_caching = 0; 2288 sm->eap_workaround = 0; 2289 sm->eap_conf_ctx = NULL; 2290 sm->ssid_len = 0; 2291 sm->wpa_ptk_rekey = 0; 2292 sm->p2p = 0; 2293 } 2294} 2295 2296 2297/** 2298 * wpa_sm_set_own_addr - Set own MAC address 2299 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2300 * @addr: Own MAC address 2301 */ 2302void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2303{ 2304 if (sm) 2305 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2306} 2307 2308 2309/** 2310 * wpa_sm_set_ifname - Set network interface name 2311 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2312 * @ifname: Interface name 2313 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2314 */ 2315void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2316 const char *bridge_ifname) 2317{ 2318 if (sm) { 2319 sm->ifname = ifname; 2320 sm->bridge_ifname = bridge_ifname; 2321 } 2322} 2323 2324 2325/** 2326 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2327 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2328 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2329 */ 2330void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2331{ 2332 if (sm) 2333 sm->eapol = eapol; 2334} 2335 2336 2337/** 2338 * wpa_sm_set_param - Set WPA state machine parameters 2339 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2340 * @param: Parameter field 2341 * @value: Parameter value 2342 * Returns: 0 on success, -1 on failure 2343 */ 2344int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2345 unsigned int value) 2346{ 2347 int ret = 0; 2348 2349 if (sm == NULL) 2350 return -1; 2351 2352 switch (param) { 2353 case RSNA_PMK_LIFETIME: 2354 if (value > 0) 2355 sm->dot11RSNAConfigPMKLifetime = value; 2356 else 2357 ret = -1; 2358 break; 2359 case RSNA_PMK_REAUTH_THRESHOLD: 2360 if (value > 0 && value <= 100) 2361 sm->dot11RSNAConfigPMKReauthThreshold = value; 2362 else 2363 ret = -1; 2364 break; 2365 case RSNA_SA_TIMEOUT: 2366 if (value > 0) 2367 sm->dot11RSNAConfigSATimeout = value; 2368 else 2369 ret = -1; 2370 break; 2371 case WPA_PARAM_PROTO: 2372 sm->proto = value; 2373 break; 2374 case WPA_PARAM_PAIRWISE: 2375 sm->pairwise_cipher = value; 2376 break; 2377 case WPA_PARAM_GROUP: 2378 sm->group_cipher = value; 2379 break; 2380 case WPA_PARAM_KEY_MGMT: 2381 sm->key_mgmt = value; 2382 break; 2383#ifdef CONFIG_IEEE80211W 2384 case WPA_PARAM_MGMT_GROUP: 2385 sm->mgmt_group_cipher = value; 2386 break; 2387#endif /* CONFIG_IEEE80211W */ 2388 case WPA_PARAM_RSN_ENABLED: 2389 sm->rsn_enabled = value; 2390 break; 2391 case WPA_PARAM_MFP: 2392 sm->mfp = value; 2393 break; 2394 default: 2395 break; 2396 } 2397 2398 return ret; 2399} 2400 2401 2402/** 2403 * wpa_sm_get_status - Get WPA state machine 2404 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2405 * @buf: Buffer for status information 2406 * @buflen: Maximum buffer length 2407 * @verbose: Whether to include verbose status information 2408 * Returns: Number of bytes written to buf. 2409 * 2410 * Query WPA state machine for status information. This function fills in 2411 * a text area with current status information. If the buffer (buf) is not 2412 * large enough, status information will be truncated to fit the buffer. 2413 */ 2414int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 2415 int verbose) 2416{ 2417 char *pos = buf, *end = buf + buflen; 2418 int ret; 2419 2420 ret = os_snprintf(pos, end - pos, 2421 "pairwise_cipher=%s\n" 2422 "group_cipher=%s\n" 2423 "key_mgmt=%s\n", 2424 wpa_cipher_txt(sm->pairwise_cipher), 2425 wpa_cipher_txt(sm->group_cipher), 2426 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 2427 if (ret < 0 || ret >= end - pos) 2428 return pos - buf; 2429 pos += ret; 2430 2431 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { 2432 struct wpa_ie_data rsn; 2433 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) 2434 >= 0 && 2435 rsn.capabilities & (WPA_CAPABILITY_MFPR | 2436 WPA_CAPABILITY_MFPC)) { 2437 ret = os_snprintf(pos, end - pos, "pmf=%d\n", 2438 (rsn.capabilities & 2439 WPA_CAPABILITY_MFPR) ? 2 : 1); 2440 if (ret < 0 || ret >= end - pos) 2441 return pos - buf; 2442 pos += ret; 2443 } 2444 } 2445 2446 return pos - buf; 2447} 2448 2449 2450int wpa_sm_pmf_enabled(struct wpa_sm *sm) 2451{ 2452 struct wpa_ie_data rsn; 2453 2454 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) 2455 return 0; 2456 2457 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && 2458 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) 2459 return 1; 2460 2461 return 0; 2462} 2463 2464 2465/** 2466 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration 2467 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2468 * @wpa_ie: Pointer to buffer for WPA/RSN IE 2469 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer 2470 * Returns: 0 on success, -1 on failure 2471 */ 2472int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, 2473 size_t *wpa_ie_len) 2474{ 2475 int res; 2476 2477 if (sm == NULL) 2478 return -1; 2479 2480 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); 2481 if (res < 0) 2482 return -1; 2483 *wpa_ie_len = res; 2484 2485 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", 2486 wpa_ie, *wpa_ie_len); 2487 2488 if (sm->assoc_wpa_ie == NULL) { 2489 /* 2490 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets 2491 * the correct version of the IE even if PMKSA caching is 2492 * aborted (which would remove PMKID from IE generation). 2493 */ 2494 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); 2495 if (sm->assoc_wpa_ie == NULL) 2496 return -1; 2497 2498 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); 2499 sm->assoc_wpa_ie_len = *wpa_ie_len; 2500 } 2501 2502 return 0; 2503} 2504 2505 2506/** 2507 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq 2508 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2509 * @ie: Pointer to IE data (starting from id) 2510 * @len: IE length 2511 * Returns: 0 on success, -1 on failure 2512 * 2513 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association 2514 * Request frame. The IE will be used to override the default value generated 2515 * with wpa_sm_set_assoc_wpa_ie_default(). 2516 */ 2517int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2518{ 2519 if (sm == NULL) 2520 return -1; 2521 2522 os_free(sm->assoc_wpa_ie); 2523 if (ie == NULL || len == 0) { 2524 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2525 "WPA: clearing own WPA/RSN IE"); 2526 sm->assoc_wpa_ie = NULL; 2527 sm->assoc_wpa_ie_len = 0; 2528 } else { 2529 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); 2530 sm->assoc_wpa_ie = os_malloc(len); 2531 if (sm->assoc_wpa_ie == NULL) 2532 return -1; 2533 2534 os_memcpy(sm->assoc_wpa_ie, ie, len); 2535 sm->assoc_wpa_ie_len = len; 2536 } 2537 2538 return 0; 2539} 2540 2541 2542/** 2543 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp 2544 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2545 * @ie: Pointer to IE data (starting from id) 2546 * @len: IE length 2547 * Returns: 0 on success, -1 on failure 2548 * 2549 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response 2550 * frame. 2551 */ 2552int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2553{ 2554 if (sm == NULL) 2555 return -1; 2556 2557 os_free(sm->ap_wpa_ie); 2558 if (ie == NULL || len == 0) { 2559 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2560 "WPA: clearing AP WPA IE"); 2561 sm->ap_wpa_ie = NULL; 2562 sm->ap_wpa_ie_len = 0; 2563 } else { 2564 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); 2565 sm->ap_wpa_ie = os_malloc(len); 2566 if (sm->ap_wpa_ie == NULL) 2567 return -1; 2568 2569 os_memcpy(sm->ap_wpa_ie, ie, len); 2570 sm->ap_wpa_ie_len = len; 2571 } 2572 2573 return 0; 2574} 2575 2576 2577/** 2578 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp 2579 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2580 * @ie: Pointer to IE data (starting from id) 2581 * @len: IE length 2582 * Returns: 0 on success, -1 on failure 2583 * 2584 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response 2585 * frame. 2586 */ 2587int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2588{ 2589 if (sm == NULL) 2590 return -1; 2591 2592 os_free(sm->ap_rsn_ie); 2593 if (ie == NULL || len == 0) { 2594 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2595 "WPA: clearing AP RSN IE"); 2596 sm->ap_rsn_ie = NULL; 2597 sm->ap_rsn_ie_len = 0; 2598 } else { 2599 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); 2600 sm->ap_rsn_ie = os_malloc(len); 2601 if (sm->ap_rsn_ie == NULL) 2602 return -1; 2603 2604 os_memcpy(sm->ap_rsn_ie, ie, len); 2605 sm->ap_rsn_ie_len = len; 2606 } 2607 2608 return 0; 2609} 2610 2611 2612/** 2613 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE 2614 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2615 * @data: Pointer to data area for parsing results 2616 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure 2617 * 2618 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the 2619 * parsed data into data. 2620 */ 2621int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) 2622{ 2623 if (sm == NULL) 2624 return -1; 2625 2626 if (sm->assoc_wpa_ie == NULL) { 2627 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2628 "WPA: No WPA/RSN IE available from association info"); 2629 return -1; 2630 } 2631 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) 2632 return -2; 2633 return 0; 2634} 2635 2636 2637int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) 2638{ 2639 return pmksa_cache_list(sm->pmksa, buf, len); 2640} 2641 2642 2643#ifdef CONFIG_TESTING_OPTIONS 2644void wpa_sm_drop_sa(struct wpa_sm *sm) 2645{ 2646 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 2647 sm->ptk_set = 0; 2648 sm->tptk_set = 0; 2649 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2650 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2651 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2652} 2653#endif /* CONFIG_TESTING_OPTIONS */ 2654 2655 2656int wpa_sm_has_ptk(struct wpa_sm *sm) 2657{ 2658 if (sm == NULL) 2659 return 0; 2660 return sm->ptk_set; 2661} 2662 2663 2664void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 2665{ 2666 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 2667} 2668 2669 2670void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 2671{ 2672 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); 2673} 2674 2675 2676#ifdef CONFIG_WNM 2677int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 2678{ 2679 u16 keyinfo; 2680 u8 keylen; /* plaintext key len */ 2681 u8 *key_rsc; 2682 2683 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 2684 struct wpa_gtk_data gd; 2685 2686 os_memset(&gd, 0, sizeof(gd)); 2687 keylen = wpa_cipher_key_len(sm->group_cipher); 2688 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); 2689 gd.alg = wpa_cipher_to_alg(sm->group_cipher); 2690 if (gd.alg == WPA_ALG_NONE) { 2691 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 2692 return -1; 2693 } 2694 2695 key_rsc = buf + 5; 2696 keyinfo = WPA_GET_LE16(buf + 2); 2697 gd.gtk_len = keylen; 2698 if (gd.gtk_len != buf[4]) { 2699 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 2700 gd.gtk_len, buf[4]); 2701 return -1; 2702 } 2703 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 2704 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 2705 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 2706 2707 os_memcpy(gd.gtk, buf + 13, gd.gtk_len); 2708 2709 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 2710 gd.gtk, gd.gtk_len); 2711 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { 2712 os_memset(&gd, 0, sizeof(gd)); 2713 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 2714 "WNM mode"); 2715 return -1; 2716 } 2717 os_memset(&gd, 0, sizeof(gd)); 2718#ifdef CONFIG_IEEE80211W 2719 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 2720 struct wpa_igtk_kde igd; 2721 u16 keyidx; 2722 2723 os_memset(&igd, 0, sizeof(igd)); 2724 keylen = wpa_cipher_key_len(sm->mgmt_group_cipher); 2725 os_memcpy(igd.keyid, buf + 2, 2); 2726 os_memcpy(igd.pn, buf + 4, 6); 2727 2728 keyidx = WPA_GET_LE16(igd.keyid); 2729 os_memcpy(igd.igtk, buf + 10, keylen); 2730 2731 wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", 2732 igd.igtk, keylen); 2733 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), 2734 broadcast_ether_addr, 2735 keyidx, 0, igd.pn, sizeof(igd.pn), 2736 igd.igtk, keylen) < 0) { 2737 wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " 2738 "WNM mode"); 2739 os_memset(&igd, 0, sizeof(igd)); 2740 return -1; 2741 } 2742 os_memset(&igd, 0, sizeof(igd)); 2743#endif /* CONFIG_IEEE80211W */ 2744 } else { 2745 wpa_printf(MSG_DEBUG, "Unknown element id"); 2746 return -1; 2747 } 2748 2749 return 0; 2750} 2751#endif /* CONFIG_WNM */ 2752 2753 2754#ifdef CONFIG_PEERKEY 2755int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr, 2756 const u8 *buf, size_t len) 2757{ 2758 struct wpa_peerkey *peerkey; 2759 2760 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 2761 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 2762 break; 2763 } 2764 2765 if (!peerkey) 2766 return 0; 2767 2768 wpa_sm_rx_eapol(sm, src_addr, buf, len); 2769 2770 return 1; 2771} 2772#endif /* CONFIG_PEERKEY */ 2773 2774 2775#ifdef CONFIG_P2P 2776 2777int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) 2778{ 2779 if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) 2780 return -1; 2781 os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); 2782 return 0; 2783} 2784 2785#endif /* CONFIG_P2P */ 2786