wpa.c revision 9866086a955d00e237cc8df3722e7dff75c02532
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 u8 buf[8]; 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 const u8 *_buf = (const u8 *) (key + 1); 406 size_t len = WPA_GET_BE16(key->key_data_length); 407 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len); 408 if (wpa_supplicant_parse_ies(_buf, len, &ie) < 0) 409 goto failed; 410 if (ie.pmkid) { 411 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " 412 "Authenticator", ie.pmkid, PMKID_LEN); 413 } 414 } 415 416 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); 417 if (res == -2) { 418 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " 419 "msg 1/4 - requesting full EAP authentication"); 420 return; 421 } 422 if (res) 423 goto failed; 424 425 if (sm->renew_snonce) { 426 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { 427 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 428 "WPA: Failed to get random data for SNonce"); 429 goto failed; 430 } 431 sm->renew_snonce = 0; 432 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", 433 sm->snonce, WPA_NONCE_LEN); 434 } 435 436 /* Calculate PTK which will be stored as a temporary PTK until it has 437 * been verified when processing message 3/4. */ 438 ptk = &sm->tptk; 439 wpa_derive_ptk(sm, src_addr, key, ptk); 440 if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { 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 } 446 sm->tptk_set = 1; 447 448 kde = sm->assoc_wpa_ie; 449 kde_len = sm->assoc_wpa_ie_len; 450 451#ifdef CONFIG_P2P 452 if (sm->p2p) { 453 kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); 454 if (kde_buf) { 455 u8 *pos; 456 wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " 457 "into EAPOL-Key 2/4"); 458 os_memcpy(kde_buf, kde, kde_len); 459 kde = kde_buf; 460 pos = kde + kde_len; 461 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 462 *pos++ = RSN_SELECTOR_LEN + 1; 463 RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); 464 pos += RSN_SELECTOR_LEN; 465 *pos++ = 0x01; 466 kde_len = pos - kde; 467 } 468 } 469#endif /* CONFIG_P2P */ 470 471 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, 472 kde, kde_len, ptk)) 473 goto failed; 474 475 os_free(kde_buf); 476 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); 477 return; 478 479failed: 480 os_free(kde_buf); 481 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 482} 483 484 485static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) 486{ 487 struct wpa_sm *sm = eloop_ctx; 488 rsn_preauth_candidate_process(sm); 489} 490 491 492static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, 493 const u8 *addr, int secure) 494{ 495 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 496 "WPA: Key negotiation completed with " 497 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), 498 wpa_cipher_txt(sm->pairwise_cipher), 499 wpa_cipher_txt(sm->group_cipher)); 500 wpa_sm_cancel_auth_timeout(sm); 501 wpa_sm_set_state(sm, WPA_COMPLETED); 502 503 if (secure) { 504 wpa_sm_mlme_setprotection( 505 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, 506 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 507 eapol_sm_notify_portValid(sm->eapol, TRUE); 508 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) 509 eapol_sm_notify_eap_success(sm->eapol, TRUE); 510 /* 511 * Start preauthentication after a short wait to avoid a 512 * possible race condition between the data receive and key 513 * configuration after the 4-Way Handshake. This increases the 514 * likelihood of the first preauth EAPOL-Start frame getting to 515 * the target AP. 516 */ 517 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); 518 } 519 520 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { 521 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 522 "RSN: Authenticator accepted " 523 "opportunistic PMKSA entry - marking it valid"); 524 sm->cur_pmksa->opportunistic = 0; 525 } 526 527#ifdef CONFIG_IEEE80211R 528 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 529 /* Prepare for the next transition */ 530 wpa_ft_prepare_auth_request(sm, NULL); 531 } 532#endif /* CONFIG_IEEE80211R */ 533} 534 535 536static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) 537{ 538 struct wpa_sm *sm = eloop_ctx; 539 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); 540 wpa_sm_key_request(sm, 0, 1); 541} 542 543 544static int wpa_supplicant_install_ptk(struct wpa_sm *sm, 545 const struct wpa_eapol_key *key) 546{ 547 int keylen, rsclen; 548 enum wpa_alg alg; 549 const u8 *key_rsc; 550 u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 551 552 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 553 "WPA: Installing PTK to the driver"); 554 555 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 556 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " 557 "Suite: NONE - do not use pairwise keys"); 558 return 0; 559 } 560 561 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { 562 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 563 "WPA: Unsupported pairwise cipher %d", 564 sm->pairwise_cipher); 565 return -1; 566 } 567 568 alg = wpa_cipher_to_alg(sm->pairwise_cipher); 569 keylen = wpa_cipher_key_len(sm->pairwise_cipher); 570 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); 571 572 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 573 key_rsc = null_rsc; 574 } else { 575 key_rsc = key->key_rsc; 576 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); 577 } 578 579 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, 580 (u8 *) sm->ptk.tk1, keylen) < 0) { 581 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 582 "WPA: Failed to set PTK to the " 583 "driver (alg=%d keylen=%d bssid=" MACSTR ")", 584 alg, keylen, MAC2STR(sm->bssid)); 585 return -1; 586 } 587 588 if (sm->wpa_ptk_rekey) { 589 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 590 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, 591 sm, NULL); 592 } 593 594 return 0; 595} 596 597 598static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, 599 int group_cipher, 600 int keylen, int maxkeylen, 601 int *key_rsc_len, 602 enum wpa_alg *alg) 603{ 604 int klen; 605 606 *alg = wpa_cipher_to_alg(group_cipher); 607 if (*alg == WPA_ALG_NONE) { 608 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 609 "WPA: Unsupported Group Cipher %d", 610 group_cipher); 611 return -1; 612 } 613 *key_rsc_len = wpa_cipher_rsc_len(group_cipher); 614 615 klen = wpa_cipher_key_len(group_cipher); 616 if (keylen != klen || maxkeylen < klen) { 617 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 618 "WPA: Unsupported %s Group Cipher key length %d (%d)", 619 wpa_cipher_txt(group_cipher), keylen, maxkeylen); 620 return -1; 621 } 622 return 0; 623} 624 625 626struct wpa_gtk_data { 627 enum wpa_alg alg; 628 int tx, key_rsc_len, keyidx; 629 u8 gtk[32]; 630 int gtk_len; 631}; 632 633 634static int wpa_supplicant_install_gtk(struct wpa_sm *sm, 635 const struct wpa_gtk_data *gd, 636 const u8 *key_rsc) 637{ 638 const u8 *_gtk = gd->gtk; 639 u8 gtk_buf[32]; 640 641 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); 642 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 643 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", 644 gd->keyidx, gd->tx, gd->gtk_len); 645 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); 646 if (sm->group_cipher == WPA_CIPHER_TKIP) { 647 /* Swap Tx/Rx keys for Michael MIC */ 648 os_memcpy(gtk_buf, gd->gtk, 16); 649 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); 650 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); 651 _gtk = gtk_buf; 652 } 653 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 654 if (wpa_sm_set_key(sm, gd->alg, NULL, 655 gd->keyidx, 1, key_rsc, gd->key_rsc_len, 656 _gtk, gd->gtk_len) < 0) { 657 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 658 "WPA: Failed to set GTK to the driver " 659 "(Group only)"); 660 return -1; 661 } 662 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, 663 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, 664 _gtk, gd->gtk_len) < 0) { 665 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 666 "WPA: Failed to set GTK to " 667 "the driver (alg=%d keylen=%d keyidx=%d)", 668 gd->alg, gd->gtk_len, gd->keyidx); 669 return -1; 670 } 671 672 return 0; 673} 674 675 676static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, 677 int tx) 678{ 679 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { 680 /* Ignore Tx bit for GTK if a pairwise key is used. One AP 681 * seemed to set this bit (incorrectly, since Tx is only when 682 * doing Group Key only APs) and without this workaround, the 683 * data connection does not work because wpa_supplicant 684 * configured non-zero keyidx to be used for unicast. */ 685 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 686 "WPA: Tx bit set for GTK, but pairwise " 687 "keys are used - ignore Tx bit"); 688 return 0; 689 } 690 return tx; 691} 692 693 694static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, 695 const struct wpa_eapol_key *key, 696 const u8 *gtk, size_t gtk_len, 697 int key_info) 698{ 699 struct wpa_gtk_data gd; 700 701 /* 702 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x 703 * GTK KDE format: 704 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] 705 * Reserved [bits 0-7] 706 * GTK 707 */ 708 709 os_memset(&gd, 0, sizeof(gd)); 710 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", 711 gtk, gtk_len); 712 713 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) 714 return -1; 715 716 gd.keyidx = gtk[0] & 0x3; 717 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 718 !!(gtk[0] & BIT(2))); 719 gtk += 2; 720 gtk_len -= 2; 721 722 os_memcpy(gd.gtk, gtk, gtk_len); 723 gd.gtk_len = gtk_len; 724 725 if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && 726 (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 727 gtk_len, gtk_len, 728 &gd.key_rsc_len, &gd.alg) || 729 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc))) { 730 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 731 "RSN: Failed to install GTK"); 732 return -1; 733 } 734 735 wpa_supplicant_key_neg_complete(sm, sm->bssid, 736 key_info & WPA_KEY_INFO_SECURE); 737 return 0; 738} 739 740 741static int ieee80211w_set_keys(struct wpa_sm *sm, 742 struct wpa_eapol_ie_parse *ie) 743{ 744#ifdef CONFIG_IEEE80211W 745 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) 746 return 0; 747 748 if (ie->igtk) { 749 const struct wpa_igtk_kde *igtk; 750 u16 keyidx; 751 if (ie->igtk_len != sizeof(*igtk)) 752 return -1; 753 igtk = (const struct wpa_igtk_kde *) ie->igtk; 754 keyidx = WPA_GET_LE16(igtk->keyid); 755 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " 756 "pn %02x%02x%02x%02x%02x%02x", 757 keyidx, MAC2STR(igtk->pn)); 758 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", 759 igtk->igtk, WPA_IGTK_LEN); 760 if (keyidx > 4095) { 761 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 762 "WPA: Invalid IGTK KeyID %d", keyidx); 763 return -1; 764 } 765 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, 766 keyidx, 0, igtk->pn, sizeof(igtk->pn), 767 igtk->igtk, WPA_IGTK_LEN) < 0) { 768 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 769 "WPA: Failed to configure IGTK to the driver"); 770 return -1; 771 } 772 } 773 774 return 0; 775#else /* CONFIG_IEEE80211W */ 776 return 0; 777#endif /* CONFIG_IEEE80211W */ 778} 779 780 781static void wpa_report_ie_mismatch(struct wpa_sm *sm, 782 const char *reason, const u8 *src_addr, 783 const u8 *wpa_ie, size_t wpa_ie_len, 784 const u8 *rsn_ie, size_t rsn_ie_len) 785{ 786 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", 787 reason, MAC2STR(src_addr)); 788 789 if (sm->ap_wpa_ie) { 790 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", 791 sm->ap_wpa_ie, sm->ap_wpa_ie_len); 792 } 793 if (wpa_ie) { 794 if (!sm->ap_wpa_ie) { 795 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 796 "WPA: No WPA IE in Beacon/ProbeResp"); 797 } 798 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", 799 wpa_ie, wpa_ie_len); 800 } 801 802 if (sm->ap_rsn_ie) { 803 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", 804 sm->ap_rsn_ie, sm->ap_rsn_ie_len); 805 } 806 if (rsn_ie) { 807 if (!sm->ap_rsn_ie) { 808 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 809 "WPA: No RSN IE in Beacon/ProbeResp"); 810 } 811 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", 812 rsn_ie, rsn_ie_len); 813 } 814 815 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); 816} 817 818 819#ifdef CONFIG_IEEE80211R 820 821static int ft_validate_mdie(struct wpa_sm *sm, 822 const unsigned char *src_addr, 823 struct wpa_eapol_ie_parse *ie, 824 const u8 *assoc_resp_mdie) 825{ 826 struct rsn_mdie *mdie; 827 828 mdie = (struct rsn_mdie *) (ie->mdie + 2); 829 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || 830 os_memcmp(mdie->mobility_domain, sm->mobility_domain, 831 MOBILITY_DOMAIN_ID_LEN) != 0) { 832 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " 833 "not match with the current mobility domain"); 834 return -1; 835 } 836 837 if (assoc_resp_mdie && 838 (assoc_resp_mdie[1] != ie->mdie[1] || 839 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { 840 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); 841 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", 842 ie->mdie, 2 + ie->mdie[1]); 843 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", 844 assoc_resp_mdie, 2 + assoc_resp_mdie[1]); 845 return -1; 846 } 847 848 return 0; 849} 850 851 852static int ft_validate_ftie(struct wpa_sm *sm, 853 const unsigned char *src_addr, 854 struct wpa_eapol_ie_parse *ie, 855 const u8 *assoc_resp_ftie) 856{ 857 if (ie->ftie == NULL) { 858 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 859 "FT: No FTIE in EAPOL-Key msg 3/4"); 860 return -1; 861 } 862 863 if (assoc_resp_ftie == NULL) 864 return 0; 865 866 if (assoc_resp_ftie[1] != ie->ftie[1] || 867 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { 868 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); 869 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", 870 ie->ftie, 2 + ie->ftie[1]); 871 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", 872 assoc_resp_ftie, 2 + assoc_resp_ftie[1]); 873 return -1; 874 } 875 876 return 0; 877} 878 879 880static int ft_validate_rsnie(struct wpa_sm *sm, 881 const unsigned char *src_addr, 882 struct wpa_eapol_ie_parse *ie) 883{ 884 struct wpa_ie_data rsn; 885 886 if (!ie->rsn_ie) 887 return 0; 888 889 /* 890 * Verify that PMKR1Name from EAPOL-Key message 3/4 891 * matches with the value we derived. 892 */ 893 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || 894 rsn.num_pmkid != 1 || rsn.pmkid == NULL) { 895 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " 896 "FT 4-way handshake message 3/4"); 897 return -1; 898 } 899 900 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { 901 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 902 "FT: PMKR1Name mismatch in " 903 "FT 4-way handshake message 3/4"); 904 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", 905 rsn.pmkid, WPA_PMK_NAME_LEN); 906 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", 907 sm->pmk_r1_name, WPA_PMK_NAME_LEN); 908 return -1; 909 } 910 911 return 0; 912} 913 914 915static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, 916 const unsigned char *src_addr, 917 struct wpa_eapol_ie_parse *ie) 918{ 919 const u8 *pos, *end, *mdie = NULL, *ftie = NULL; 920 921 if (sm->assoc_resp_ies) { 922 pos = sm->assoc_resp_ies; 923 end = pos + sm->assoc_resp_ies_len; 924 while (pos + 2 < end) { 925 if (pos + 2 + pos[1] > end) 926 break; 927 switch (*pos) { 928 case WLAN_EID_MOBILITY_DOMAIN: 929 mdie = pos; 930 break; 931 case WLAN_EID_FAST_BSS_TRANSITION: 932 ftie = pos; 933 break; 934 } 935 pos += 2 + pos[1]; 936 } 937 } 938 939 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || 940 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || 941 ft_validate_rsnie(sm, src_addr, ie) < 0) 942 return -1; 943 944 return 0; 945} 946 947#endif /* CONFIG_IEEE80211R */ 948 949 950static int wpa_supplicant_validate_ie(struct wpa_sm *sm, 951 const unsigned char *src_addr, 952 struct wpa_eapol_ie_parse *ie) 953{ 954 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { 955 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 956 "WPA: No WPA/RSN IE for this AP known. " 957 "Trying to get from scan results"); 958 if (wpa_sm_get_beacon_ie(sm) < 0) { 959 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 960 "WPA: Could not find AP from " 961 "the scan results"); 962 } else { 963 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, 964 "WPA: Found the current AP from " 965 "updated scan results"); 966 } 967 } 968 969 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && 970 (sm->ap_wpa_ie || sm->ap_rsn_ie)) { 971 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 972 "with IE in Beacon/ProbeResp (no IE?)", 973 src_addr, ie->wpa_ie, ie->wpa_ie_len, 974 ie->rsn_ie, ie->rsn_ie_len); 975 return -1; 976 } 977 978 if ((ie->wpa_ie && sm->ap_wpa_ie && 979 (ie->wpa_ie_len != sm->ap_wpa_ie_len || 980 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || 981 (ie->rsn_ie && sm->ap_rsn_ie && 982 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), 983 sm->ap_rsn_ie, sm->ap_rsn_ie_len, 984 ie->rsn_ie, ie->rsn_ie_len))) { 985 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 986 "with IE in Beacon/ProbeResp", 987 src_addr, ie->wpa_ie, ie->wpa_ie_len, 988 ie->rsn_ie, ie->rsn_ie_len); 989 return -1; 990 } 991 992 if (sm->proto == WPA_PROTO_WPA && 993 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { 994 wpa_report_ie_mismatch(sm, "Possible downgrade attack " 995 "detected - RSN was enabled and RSN IE " 996 "was in msg 3/4, but not in " 997 "Beacon/ProbeResp", 998 src_addr, ie->wpa_ie, ie->wpa_ie_len, 999 ie->rsn_ie, ie->rsn_ie_len); 1000 return -1; 1001 } 1002 1003#ifdef CONFIG_IEEE80211R 1004 if (wpa_key_mgmt_ft(sm->key_mgmt) && 1005 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) 1006 return -1; 1007#endif /* CONFIG_IEEE80211R */ 1008 1009 return 0; 1010} 1011 1012 1013/** 1014 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake 1015 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1016 * @dst: Destination address for the frame 1017 * @key: Pointer to the EAPOL-Key frame header 1018 * @ver: Version bits from EAPOL-Key Key Info 1019 * @key_info: Key Info 1020 * @kde: KDEs to include the EAPOL-Key frame 1021 * @kde_len: Length of KDEs 1022 * @ptk: PTK to use for keyed hash and encryption 1023 * Returns: 0 on success, -1 on failure 1024 */ 1025int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 1026 const struct wpa_eapol_key *key, 1027 u16 ver, u16 key_info, 1028 const u8 *kde, size_t kde_len, 1029 struct wpa_ptk *ptk) 1030{ 1031 size_t rlen; 1032 struct wpa_eapol_key *reply; 1033 u8 *rbuf; 1034 1035 if (kde) 1036 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len); 1037 1038 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1039 sizeof(*reply) + kde_len, 1040 &rlen, (void *) &reply); 1041 if (rbuf == NULL) 1042 return -1; 1043 1044 reply->type = (sm->proto == WPA_PROTO_RSN || 1045 sm->proto == WPA_PROTO_OSEN) ? 1046 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1047 key_info &= WPA_KEY_INFO_SECURE; 1048 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; 1049 WPA_PUT_BE16(reply->key_info, key_info); 1050 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1051 WPA_PUT_BE16(reply->key_length, 0); 1052 else 1053 os_memcpy(reply->key_length, key->key_length, 2); 1054 os_memcpy(reply->replay_counter, key->replay_counter, 1055 WPA_REPLAY_COUNTER_LEN); 1056 1057 WPA_PUT_BE16(reply->key_data_length, kde_len); 1058 if (kde) 1059 os_memcpy(reply + 1, kde, kde_len); 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 && ie.igtk_len != sizeof(struct wpa_igtk_kde)) { 1101 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1102 "WPA: Invalid IGTK KDE length %lu", 1103 (unsigned long) ie.igtk_len); 1104 goto failed; 1105 } 1106#endif /* CONFIG_IEEE80211W */ 1107 1108 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1109 goto failed; 1110 1111 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1112 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1113 "WPA: ANonce from message 1 of 4-Way Handshake " 1114 "differs from 3 of 4-Way Handshake - drop packet (src=" 1115 MACSTR ")", MAC2STR(sm->bssid)); 1116 goto failed; 1117 } 1118 1119 keylen = WPA_GET_BE16(key->key_length); 1120 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { 1121 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1122 "WPA: Invalid %s key length %d (src=" MACSTR 1123 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, 1124 MAC2STR(sm->bssid)); 1125 goto failed; 1126 } 1127 1128#ifdef CONFIG_P2P 1129 if (ie.ip_addr_alloc) { 1130 os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); 1131 wpa_hexdump(MSG_DEBUG, "P2P: IP address info", 1132 sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); 1133 } 1134#endif /* CONFIG_P2P */ 1135 1136 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1137 NULL, 0, &sm->ptk)) { 1138 goto failed; 1139 } 1140 1141 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1142 * for the next 4-Way Handshake. If msg 3 is received again, the old 1143 * SNonce will still be used to avoid changing PTK. */ 1144 sm->renew_snonce = 1; 1145 1146 if (key_info & WPA_KEY_INFO_INSTALL) { 1147 if (wpa_supplicant_install_ptk(sm, key)) 1148 goto failed; 1149 } 1150 1151 if (key_info & WPA_KEY_INFO_SECURE) { 1152 wpa_sm_mlme_setprotection( 1153 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1154 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1155 eapol_sm_notify_portValid(sm->eapol, TRUE); 1156 } 1157 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1158 1159 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { 1160 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1161 key_info & WPA_KEY_INFO_SECURE); 1162 } else if (ie.gtk && 1163 wpa_supplicant_pairwise_gtk(sm, key, 1164 ie.gtk, ie.gtk_len, key_info) < 0) { 1165 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1166 "RSN: Failed to configure GTK"); 1167 goto failed; 1168 } 1169 1170 if (ieee80211w_set_keys(sm, &ie) < 0) { 1171 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1172 "RSN: Failed to configure IGTK"); 1173 goto failed; 1174 } 1175 1176 if (ie.gtk) 1177 wpa_sm_set_rekey_offload(sm); 1178 1179 return; 1180 1181failed: 1182 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1183} 1184 1185 1186static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1187 const u8 *keydata, 1188 size_t keydatalen, 1189 u16 key_info, 1190 struct wpa_gtk_data *gd) 1191{ 1192 int maxkeylen; 1193 struct wpa_eapol_ie_parse ie; 1194 1195 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); 1196 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1197 return -1; 1198 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1199 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1200 "WPA: GTK IE in unencrypted key data"); 1201 return -1; 1202 } 1203 if (ie.gtk == NULL) { 1204 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1205 "WPA: No GTK IE in Group Key msg 1/2"); 1206 return -1; 1207 } 1208 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1209 1210 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1211 gd->gtk_len, maxkeylen, 1212 &gd->key_rsc_len, &gd->alg)) 1213 return -1; 1214 1215 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", 1216 ie.gtk, ie.gtk_len); 1217 gd->keyidx = ie.gtk[0] & 0x3; 1218 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1219 !!(ie.gtk[0] & BIT(2))); 1220 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1221 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1222 "RSN: Too long GTK in GTK IE (len=%lu)", 1223 (unsigned long) ie.gtk_len - 2); 1224 return -1; 1225 } 1226 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1227 1228 if (ieee80211w_set_keys(sm, &ie) < 0) 1229 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1230 "RSN: Failed to configure IGTK"); 1231 1232 return 0; 1233} 1234 1235 1236static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1237 const struct wpa_eapol_key *key, 1238 size_t keydatalen, int key_info, 1239 size_t extra_len, u16 ver, 1240 struct wpa_gtk_data *gd) 1241{ 1242 size_t maxkeylen; 1243 u8 ek[32]; 1244 1245 gd->gtk_len = WPA_GET_BE16(key->key_length); 1246 maxkeylen = keydatalen; 1247 if (keydatalen > extra_len) { 1248 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1249 "WPA: Truncated EAPOL-Key packet: " 1250 "key_data_length=%lu > extra_len=%lu", 1251 (unsigned long) keydatalen, (unsigned long) extra_len); 1252 return -1; 1253 } 1254 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1255 if (maxkeylen < 8) { 1256 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1257 "WPA: Too short maxkeylen (%lu)", 1258 (unsigned long) maxkeylen); 1259 return -1; 1260 } 1261 maxkeylen -= 8; 1262 } 1263 1264 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1265 gd->gtk_len, maxkeylen, 1266 &gd->key_rsc_len, &gd->alg)) 1267 return -1; 1268 1269 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1270 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1271 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1272 os_memcpy(ek, key->key_iv, 16); 1273 os_memcpy(ek + 16, sm->ptk.kek, 16); 1274 if (keydatalen > sizeof(gd->gtk)) { 1275 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1276 "WPA: RC4 key data too long (%lu)", 1277 (unsigned long) keydatalen); 1278 return -1; 1279 } 1280 os_memcpy(gd->gtk, key + 1, keydatalen); 1281 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { 1282 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1283 "WPA: RC4 failed"); 1284 return -1; 1285 } 1286 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1287 if (keydatalen % 8) { 1288 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1289 "WPA: Unsupported AES-WRAP len %lu", 1290 (unsigned long) keydatalen); 1291 return -1; 1292 } 1293 if (maxkeylen > sizeof(gd->gtk)) { 1294 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1295 "WPA: AES-WRAP key data " 1296 "too long (keydatalen=%lu maxkeylen=%lu)", 1297 (unsigned long) keydatalen, 1298 (unsigned long) maxkeylen); 1299 return -1; 1300 } 1301 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, 1302 (const u8 *) (key + 1), gd->gtk)) { 1303 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1304 "WPA: AES unwrap failed - could not decrypt " 1305 "GTK"); 1306 return -1; 1307 } 1308 } else { 1309 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1310 "WPA: Unsupported key_info type %d", ver); 1311 return -1; 1312 } 1313 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1314 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1315 return 0; 1316} 1317 1318 1319static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1320 const struct wpa_eapol_key *key, 1321 int ver, u16 key_info) 1322{ 1323 size_t rlen; 1324 struct wpa_eapol_key *reply; 1325 u8 *rbuf; 1326 1327 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1328 sizeof(*reply), &rlen, (void *) &reply); 1329 if (rbuf == NULL) 1330 return -1; 1331 1332 reply->type = (sm->proto == WPA_PROTO_RSN || 1333 sm->proto == WPA_PROTO_OSEN) ? 1334 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1335 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1336 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; 1337 WPA_PUT_BE16(reply->key_info, key_info); 1338 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1339 WPA_PUT_BE16(reply->key_length, 0); 1340 else 1341 os_memcpy(reply->key_length, key->key_length, 2); 1342 os_memcpy(reply->replay_counter, key->replay_counter, 1343 WPA_REPLAY_COUNTER_LEN); 1344 1345 WPA_PUT_BE16(reply->key_data_length, 0); 1346 1347 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1348 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, 1349 rbuf, rlen, reply->key_mic); 1350 1351 return 0; 1352} 1353 1354 1355static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1356 const unsigned char *src_addr, 1357 const struct wpa_eapol_key *key, 1358 int extra_len, u16 ver) 1359{ 1360 u16 key_info, keydatalen; 1361 int rekey, ret; 1362 struct wpa_gtk_data gd; 1363 1364 os_memset(&gd, 0, sizeof(gd)); 1365 1366 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1367 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1368 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1369 1370 key_info = WPA_GET_BE16(key->key_info); 1371 keydatalen = WPA_GET_BE16(key->key_data_length); 1372 1373 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 1374 ret = wpa_supplicant_process_1_of_2_rsn(sm, 1375 (const u8 *) (key + 1), 1376 keydatalen, key_info, 1377 &gd); 1378 } else { 1379 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, 1380 key_info, extra_len, 1381 ver, &gd); 1382 } 1383 1384 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1385 1386 if (ret) 1387 goto failed; 1388 1389 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || 1390 wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) 1391 goto failed; 1392 1393 if (rekey) { 1394 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " 1395 "completed with " MACSTR " [GTK=%s]", 1396 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1397 wpa_sm_cancel_auth_timeout(sm); 1398 wpa_sm_set_state(sm, WPA_COMPLETED); 1399 } else { 1400 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1401 key_info & 1402 WPA_KEY_INFO_SECURE); 1403 } 1404 1405 wpa_sm_set_rekey_offload(sm); 1406 1407 return; 1408 1409failed: 1410 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1411} 1412 1413 1414static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1415 struct wpa_eapol_key *key, 1416 u16 ver, 1417 const u8 *buf, size_t len) 1418{ 1419 u8 mic[16]; 1420 int ok = 0; 1421 1422 os_memcpy(mic, key->key_mic, 16); 1423 if (sm->tptk_set) { 1424 os_memset(key->key_mic, 0, 16); 1425 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, 1426 key->key_mic); 1427 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1428 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1429 "WPA: Invalid EAPOL-Key MIC " 1430 "when using TPTK - ignoring TPTK"); 1431 } else { 1432 ok = 1; 1433 sm->tptk_set = 0; 1434 sm->ptk_set = 1; 1435 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1436 } 1437 } 1438 1439 if (!ok && sm->ptk_set) { 1440 os_memset(key->key_mic, 0, 16); 1441 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len, 1442 key->key_mic); 1443 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1444 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1445 "WPA: Invalid EAPOL-Key MIC - " 1446 "dropping packet"); 1447 return -1; 1448 } 1449 ok = 1; 1450 } 1451 1452 if (!ok) { 1453 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1454 "WPA: Could not verify EAPOL-Key MIC - " 1455 "dropping packet"); 1456 return -1; 1457 } 1458 1459 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1460 WPA_REPLAY_COUNTER_LEN); 1461 sm->rx_replay_counter_set = 1; 1462 return 0; 1463} 1464 1465 1466/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ 1467static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, 1468 struct wpa_eapol_key *key, u16 ver) 1469{ 1470 u16 keydatalen = WPA_GET_BE16(key->key_data_length); 1471 1472 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", 1473 (u8 *) (key + 1), keydatalen); 1474 if (!sm->ptk_set) { 1475 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1476 "WPA: PTK not available, cannot decrypt EAPOL-Key Key " 1477 "Data"); 1478 return -1; 1479 } 1480 1481 /* Decrypt key data here so that this operation does not need 1482 * to be implemented separately for each message type. */ 1483 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1484 u8 ek[32]; 1485 os_memcpy(ek, key->key_iv, 16); 1486 os_memcpy(ek + 16, sm->ptk.kek, 16); 1487 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) { 1488 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1489 "WPA: RC4 failed"); 1490 return -1; 1491 } 1492 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1493 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || 1494 sm->key_mgmt == WPA_KEY_MGMT_OSEN) { 1495 u8 *buf; 1496 if (keydatalen % 8) { 1497 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1498 "WPA: Unsupported AES-WRAP len %d", 1499 keydatalen); 1500 return -1; 1501 } 1502 keydatalen -= 8; /* AES-WRAP adds 8 bytes */ 1503 buf = os_malloc(keydatalen); 1504 if (buf == NULL) { 1505 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1506 "WPA: No memory for AES-UNWRAP buffer"); 1507 return -1; 1508 } 1509 if (aes_unwrap(sm->ptk.kek, keydatalen / 8, 1510 (u8 *) (key + 1), buf)) { 1511 os_free(buf); 1512 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1513 "WPA: AES unwrap failed - " 1514 "could not decrypt EAPOL-Key key data"); 1515 return -1; 1516 } 1517 os_memcpy(key + 1, buf, keydatalen); 1518 os_free(buf); 1519 WPA_PUT_BE16(key->key_data_length, keydatalen); 1520 } else { 1521 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1522 "WPA: Unsupported key_info type %d", ver); 1523 return -1; 1524 } 1525 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 1526 (u8 *) (key + 1), keydatalen); 1527 return 0; 1528} 1529 1530 1531/** 1532 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 1533 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1534 */ 1535void wpa_sm_aborted_cached(struct wpa_sm *sm) 1536{ 1537 if (sm && sm->cur_pmksa) { 1538 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1539 "RSN: Cancelling PMKSA caching attempt"); 1540 sm->cur_pmksa = NULL; 1541 } 1542} 1543 1544 1545static void wpa_eapol_key_dump(struct wpa_sm *sm, 1546 const struct wpa_eapol_key *key) 1547{ 1548#ifndef CONFIG_NO_STDOUT_DEBUG 1549 u16 key_info = WPA_GET_BE16(key->key_info); 1550 1551 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 1552 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1553 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 1554 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 1555 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1556 WPA_KEY_INFO_KEY_INDEX_SHIFT, 1557 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 1558 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 1559 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 1560 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 1561 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 1562 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 1563 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 1564 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 1565 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 1566 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1567 " key_length=%u key_data_length=%u", 1568 WPA_GET_BE16(key->key_length), 1569 WPA_GET_BE16(key->key_data_length)); 1570 wpa_hexdump(MSG_DEBUG, " replay_counter", 1571 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 1572 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 1573 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 1574 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 1575 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 1576 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); 1577#endif /* CONFIG_NO_STDOUT_DEBUG */ 1578} 1579 1580 1581/** 1582 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 1583 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1584 * @src_addr: Source MAC address of the EAPOL packet 1585 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 1586 * @len: Length of the EAPOL frame 1587 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 1588 * 1589 * This function is called for each received EAPOL frame. Other than EAPOL-Key 1590 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 1591 * only processing WPA and WPA2 EAPOL-Key frames. 1592 * 1593 * The received EAPOL-Key packets are validated and valid packets are replied 1594 * to. In addition, key material (PTK, GTK) is configured at the end of a 1595 * successful key handshake. 1596 */ 1597int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 1598 const u8 *buf, size_t len) 1599{ 1600 size_t plen, data_len, extra_len; 1601 struct ieee802_1x_hdr *hdr; 1602 struct wpa_eapol_key *key; 1603 u16 key_info, ver; 1604 u8 *tmp; 1605 int ret = -1; 1606 struct wpa_peerkey *peerkey = NULL; 1607 1608#ifdef CONFIG_IEEE80211R 1609 sm->ft_completed = 0; 1610#endif /* CONFIG_IEEE80211R */ 1611 1612 if (len < sizeof(*hdr) + sizeof(*key)) { 1613 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1614 "WPA: EAPOL frame too short to be a WPA " 1615 "EAPOL-Key (len %lu, expecting at least %lu)", 1616 (unsigned long) len, 1617 (unsigned long) sizeof(*hdr) + sizeof(*key)); 1618 return 0; 1619 } 1620 1621 tmp = os_malloc(len); 1622 if (tmp == NULL) 1623 return -1; 1624 os_memcpy(tmp, buf, len); 1625 1626 hdr = (struct ieee802_1x_hdr *) tmp; 1627 key = (struct wpa_eapol_key *) (hdr + 1); 1628 plen = be_to_host16(hdr->length); 1629 data_len = plen + sizeof(*hdr); 1630 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1631 "IEEE 802.1X RX: version=%d type=%d length=%lu", 1632 hdr->version, hdr->type, (unsigned long) plen); 1633 1634 if (hdr->version < EAPOL_VERSION) { 1635 /* TODO: backwards compatibility */ 1636 } 1637 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 1638 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1639 "WPA: EAPOL frame (type %u) discarded, " 1640 "not a Key frame", hdr->type); 1641 ret = 0; 1642 goto out; 1643 } 1644 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { 1645 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1646 "WPA: EAPOL frame payload size %lu " 1647 "invalid (frame size %lu)", 1648 (unsigned long) plen, (unsigned long) len); 1649 ret = 0; 1650 goto out; 1651 } 1652 1653 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) 1654 { 1655 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1656 "WPA: EAPOL-Key type (%d) unknown, discarded", 1657 key->type); 1658 ret = 0; 1659 goto out; 1660 } 1661 wpa_eapol_key_dump(sm, key); 1662 1663 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 1664 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len); 1665 if (data_len < len) { 1666 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1667 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 1668 (unsigned long) len - data_len); 1669 } 1670 key_info = WPA_GET_BE16(key->key_info); 1671 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 1672 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 1673#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 1674 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1675#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 1676 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && 1677 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1678 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1679 "WPA: Unsupported EAPOL-Key descriptor version %d", 1680 ver); 1681 goto out; 1682 } 1683 1684 if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && 1685 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { 1686 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1687 "OSEN: Unsupported EAPOL-Key descriptor version %d", 1688 ver); 1689 goto out; 1690 } 1691 1692#ifdef CONFIG_IEEE80211R 1693 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 1694 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 1695 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1696 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1697 "FT: AP did not use AES-128-CMAC"); 1698 goto out; 1699 } 1700 } else 1701#endif /* CONFIG_IEEE80211R */ 1702#ifdef CONFIG_IEEE80211W 1703 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 1704 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1705 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1706 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1707 "WPA: AP did not use the " 1708 "negotiated AES-128-CMAC"); 1709 goto out; 1710 } 1711 } else 1712#endif /* CONFIG_IEEE80211W */ 1713 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 1714 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1715 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1716 "WPA: CCMP is used, but EAPOL-Key " 1717 "descriptor version (%d) is not 2", ver); 1718 if (sm->group_cipher != WPA_CIPHER_CCMP && 1719 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 1720 /* Earlier versions of IEEE 802.11i did not explicitly 1721 * require version 2 descriptor for all EAPOL-Key 1722 * packets, so allow group keys to use version 1 if 1723 * CCMP is not used for them. */ 1724 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1725 "WPA: Backwards compatibility: allow invalid " 1726 "version for non-CCMP group keys"); 1727 } else 1728 goto out; 1729 } 1730 if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 1731 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1732 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1733 "WPA: GCMP is used, but EAPOL-Key " 1734 "descriptor version (%d) is not 2", ver); 1735 goto out; 1736 } 1737 1738#ifdef CONFIG_PEERKEY 1739 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 1740 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 1741 break; 1742 } 1743 1744 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { 1745 if (!peerkey->initiator && peerkey->replay_counter_set && 1746 os_memcmp(key->replay_counter, peerkey->replay_counter, 1747 WPA_REPLAY_COUNTER_LEN) <= 0) { 1748 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1749 "RSN: EAPOL-Key Replay Counter did not " 1750 "increase (STK) - dropping packet"); 1751 goto out; 1752 } else if (peerkey->initiator) { 1753 u8 _tmp[WPA_REPLAY_COUNTER_LEN]; 1754 os_memcpy(_tmp, key->replay_counter, 1755 WPA_REPLAY_COUNTER_LEN); 1756 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); 1757 if (os_memcmp(_tmp, peerkey->replay_counter, 1758 WPA_REPLAY_COUNTER_LEN) != 0) { 1759 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1760 "RSN: EAPOL-Key Replay " 1761 "Counter did not match (STK) - " 1762 "dropping packet"); 1763 goto out; 1764 } 1765 } 1766 } 1767 1768 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { 1769 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1770 "RSN: Ack bit in key_info from STK peer"); 1771 goto out; 1772 } 1773#endif /* CONFIG_PEERKEY */ 1774 1775 if (!peerkey && sm->rx_replay_counter_set && 1776 os_memcmp(key->replay_counter, sm->rx_replay_counter, 1777 WPA_REPLAY_COUNTER_LEN) <= 0) { 1778 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1779 "WPA: EAPOL-Key Replay Counter did not increase - " 1780 "dropping packet"); 1781 goto out; 1782 } 1783 1784 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) 1785#ifdef CONFIG_PEERKEY 1786 && (peerkey == NULL || !peerkey->initiator) 1787#endif /* CONFIG_PEERKEY */ 1788 ) { 1789 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1790 "WPA: No Ack bit in key_info"); 1791 goto out; 1792 } 1793 1794 if (key_info & WPA_KEY_INFO_REQUEST) { 1795 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1796 "WPA: EAPOL-Key with Request bit - dropped"); 1797 goto out; 1798 } 1799 1800 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && 1801 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 1802 goto out; 1803 1804#ifdef CONFIG_PEERKEY 1805 if ((key_info & WPA_KEY_INFO_MIC) && peerkey && 1806 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) 1807 goto out; 1808#endif /* CONFIG_PEERKEY */ 1809 1810 extra_len = data_len - sizeof(*hdr) - sizeof(*key); 1811 1812 if (WPA_GET_BE16(key->key_data_length) > extra_len) { 1813 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 1814 "frame - key_data overflow (%d > %lu)", 1815 WPA_GET_BE16(key->key_data_length), 1816 (unsigned long) extra_len); 1817 goto out; 1818 } 1819 extra_len = WPA_GET_BE16(key->key_data_length); 1820 1821 if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && 1822 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1823 if (wpa_supplicant_decrypt_key_data(sm, key, ver)) 1824 goto out; 1825 extra_len = WPA_GET_BE16(key->key_data_length); 1826 } 1827 1828 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 1829 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 1830 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1831 "WPA: Ignored EAPOL-Key (Pairwise) with " 1832 "non-zero key index"); 1833 goto out; 1834 } 1835 if (peerkey) { 1836 /* PeerKey 4-Way Handshake */ 1837 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); 1838 } else if (key_info & WPA_KEY_INFO_MIC) { 1839 /* 3/4 4-Way Handshake */ 1840 wpa_supplicant_process_3_of_4(sm, key, ver); 1841 } else { 1842 /* 1/4 4-Way Handshake */ 1843 wpa_supplicant_process_1_of_4(sm, src_addr, key, 1844 ver); 1845 } 1846 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 1847 /* PeerKey SMK Handshake */ 1848 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info, 1849 ver); 1850 } else { 1851 if (key_info & WPA_KEY_INFO_MIC) { 1852 /* 1/2 Group Key Handshake */ 1853 wpa_supplicant_process_1_of_2(sm, src_addr, key, 1854 extra_len, ver); 1855 } else { 1856 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1857 "WPA: EAPOL-Key (Group) without Mic bit - " 1858 "dropped"); 1859 } 1860 } 1861 1862 ret = 1; 1863 1864out: 1865 os_free(tmp); 1866 return ret; 1867} 1868 1869 1870#ifdef CONFIG_CTRL_IFACE 1871static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 1872{ 1873 switch (sm->key_mgmt) { 1874 case WPA_KEY_MGMT_IEEE8021X: 1875 return ((sm->proto == WPA_PROTO_RSN || 1876 sm->proto == WPA_PROTO_OSEN) ? 1877 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 1878 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 1879 case WPA_KEY_MGMT_PSK: 1880 return (sm->proto == WPA_PROTO_RSN ? 1881 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 1882 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 1883#ifdef CONFIG_IEEE80211R 1884 case WPA_KEY_MGMT_FT_IEEE8021X: 1885 return RSN_AUTH_KEY_MGMT_FT_802_1X; 1886 case WPA_KEY_MGMT_FT_PSK: 1887 return RSN_AUTH_KEY_MGMT_FT_PSK; 1888#endif /* CONFIG_IEEE80211R */ 1889#ifdef CONFIG_IEEE80211W 1890 case WPA_KEY_MGMT_IEEE8021X_SHA256: 1891 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 1892 case WPA_KEY_MGMT_PSK_SHA256: 1893 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 1894#endif /* CONFIG_IEEE80211W */ 1895 case WPA_KEY_MGMT_CCKM: 1896 return (sm->proto == WPA_PROTO_RSN ? 1897 RSN_AUTH_KEY_MGMT_CCKM: 1898 WPA_AUTH_KEY_MGMT_CCKM); 1899 case WPA_KEY_MGMT_WPA_NONE: 1900 return WPA_AUTH_KEY_MGMT_NONE; 1901 default: 1902 return 0; 1903 } 1904} 1905 1906 1907#define RSN_SUITE "%02x-%02x-%02x-%d" 1908#define RSN_SUITE_ARG(s) \ 1909((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 1910 1911/** 1912 * wpa_sm_get_mib - Dump text list of MIB entries 1913 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1914 * @buf: Buffer for the list 1915 * @buflen: Length of the buffer 1916 * Returns: Number of bytes written to buffer 1917 * 1918 * This function is used fetch dot11 MIB variables. 1919 */ 1920int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 1921{ 1922 char pmkid_txt[PMKID_LEN * 2 + 1]; 1923 int rsna, ret; 1924 size_t len; 1925 1926 if (sm->cur_pmksa) { 1927 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 1928 sm->cur_pmksa->pmkid, PMKID_LEN); 1929 } else 1930 pmkid_txt[0] = '\0'; 1931 1932 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 1933 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 1934 sm->proto == WPA_PROTO_RSN) 1935 rsna = 1; 1936 else 1937 rsna = 0; 1938 1939 ret = os_snprintf(buf, buflen, 1940 "dot11RSNAOptionImplemented=TRUE\n" 1941 "dot11RSNAPreauthenticationImplemented=TRUE\n" 1942 "dot11RSNAEnabled=%s\n" 1943 "dot11RSNAPreauthenticationEnabled=%s\n" 1944 "dot11RSNAConfigVersion=%d\n" 1945 "dot11RSNAConfigPairwiseKeysSupported=5\n" 1946 "dot11RSNAConfigGroupCipherSize=%d\n" 1947 "dot11RSNAConfigPMKLifetime=%d\n" 1948 "dot11RSNAConfigPMKReauthThreshold=%d\n" 1949 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 1950 "dot11RSNAConfigSATimeout=%d\n", 1951 rsna ? "TRUE" : "FALSE", 1952 rsna ? "TRUE" : "FALSE", 1953 RSN_VERSION, 1954 wpa_cipher_key_len(sm->group_cipher) * 8, 1955 sm->dot11RSNAConfigPMKLifetime, 1956 sm->dot11RSNAConfigPMKReauthThreshold, 1957 sm->dot11RSNAConfigSATimeout); 1958 if (ret < 0 || (size_t) ret >= buflen) 1959 return 0; 1960 len = ret; 1961 1962 ret = os_snprintf( 1963 buf + len, buflen - len, 1964 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 1965 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 1966 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 1967 "dot11RSNAPMKIDUsed=%s\n" 1968 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 1969 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 1970 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 1971 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 1972 "dot11RSNA4WayHandshakeFailures=%u\n", 1973 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1974 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1975 sm->pairwise_cipher)), 1976 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1977 sm->group_cipher)), 1978 pmkid_txt, 1979 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1980 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1981 sm->pairwise_cipher)), 1982 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1983 sm->group_cipher)), 1984 sm->dot11RSNA4WayHandshakeFailures); 1985 if (ret >= 0 && (size_t) ret < buflen) 1986 len += ret; 1987 1988 return (int) len; 1989} 1990#endif /* CONFIG_CTRL_IFACE */ 1991 1992 1993static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 1994 void *ctx, enum pmksa_free_reason reason) 1995{ 1996 struct wpa_sm *sm = ctx; 1997 int deauth = 0; 1998 1999 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " 2000 MACSTR " reason=%d", MAC2STR(entry->aa), reason); 2001 2002 if (sm->cur_pmksa == entry) { 2003 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2004 "RSN: %s current PMKSA entry", 2005 reason == PMKSA_REPLACE ? "replaced" : "removed"); 2006 pmksa_cache_clear_current(sm); 2007 2008 /* 2009 * If an entry is simply being replaced, there's no need to 2010 * deauthenticate because it will be immediately re-added. 2011 * This happens when EAP authentication is completed again 2012 * (reauth or failed PMKSA caching attempt). 2013 */ 2014 if (reason != PMKSA_REPLACE) 2015 deauth = 1; 2016 } 2017 2018 if (reason == PMKSA_EXPIRE && 2019 (sm->pmk_len == entry->pmk_len && 2020 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2021 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2022 "RSN: deauthenticating due to expired PMK"); 2023 pmksa_cache_clear_current(sm); 2024 deauth = 1; 2025 } 2026 2027 if (deauth) { 2028 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2029 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2030 } 2031} 2032 2033 2034/** 2035 * wpa_sm_init - Initialize WPA state machine 2036 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2037 * Returns: Pointer to the allocated WPA state machine data 2038 * 2039 * This function is used to allocate a new WPA state machine and the returned 2040 * value is passed to all WPA state machine calls. 2041 */ 2042struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2043{ 2044 struct wpa_sm *sm; 2045 2046 sm = os_zalloc(sizeof(*sm)); 2047 if (sm == NULL) 2048 return NULL; 2049 dl_list_init(&sm->pmksa_candidates); 2050 sm->renew_snonce = 1; 2051 sm->ctx = ctx; 2052 2053 sm->dot11RSNAConfigPMKLifetime = 43200; 2054 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2055 sm->dot11RSNAConfigSATimeout = 60; 2056 2057 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2058 if (sm->pmksa == NULL) { 2059 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2060 "RSN: PMKSA cache initialization failed"); 2061 os_free(sm); 2062 return NULL; 2063 } 2064 2065 return sm; 2066} 2067 2068 2069/** 2070 * wpa_sm_deinit - Deinitialize WPA state machine 2071 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2072 */ 2073void wpa_sm_deinit(struct wpa_sm *sm) 2074{ 2075 if (sm == NULL) 2076 return; 2077 pmksa_cache_deinit(sm->pmksa); 2078 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2079 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2080 os_free(sm->assoc_wpa_ie); 2081 os_free(sm->ap_wpa_ie); 2082 os_free(sm->ap_rsn_ie); 2083 os_free(sm->ctx); 2084 peerkey_deinit(sm); 2085#ifdef CONFIG_IEEE80211R 2086 os_free(sm->assoc_resp_ies); 2087#endif /* CONFIG_IEEE80211R */ 2088 os_free(sm); 2089} 2090 2091 2092/** 2093 * wpa_sm_notify_assoc - Notify WPA state machine about association 2094 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2095 * @bssid: The BSSID of the new association 2096 * 2097 * This function is called to let WPA state machine know that the connection 2098 * was established. 2099 */ 2100void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2101{ 2102 int clear_ptk = 1; 2103 2104 if (sm == NULL) 2105 return; 2106 2107 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2108 "WPA: Association event - clear replay counter"); 2109 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2110 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2111 sm->rx_replay_counter_set = 0; 2112 sm->renew_snonce = 1; 2113 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2114 rsn_preauth_deinit(sm); 2115 2116#ifdef CONFIG_IEEE80211R 2117 if (wpa_ft_is_completed(sm)) { 2118 /* 2119 * Clear portValid to kick EAPOL state machine to re-enter 2120 * AUTHENTICATED state to get the EAPOL port Authorized. 2121 */ 2122 eapol_sm_notify_portValid(sm->eapol, FALSE); 2123 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2124 2125 /* Prepare for the next transition */ 2126 wpa_ft_prepare_auth_request(sm, NULL); 2127 2128 clear_ptk = 0; 2129 } 2130#endif /* CONFIG_IEEE80211R */ 2131 2132 if (clear_ptk) { 2133 /* 2134 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2135 * this is not part of a Fast BSS Transition. 2136 */ 2137 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2138 sm->ptk_set = 0; 2139 sm->tptk_set = 0; 2140 } 2141 2142#ifdef CONFIG_TDLS 2143 wpa_tdls_assoc(sm); 2144#endif /* CONFIG_TDLS */ 2145 2146#ifdef CONFIG_P2P 2147 os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); 2148#endif /* CONFIG_P2P */ 2149} 2150 2151 2152/** 2153 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2154 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2155 * 2156 * This function is called to let WPA state machine know that the connection 2157 * was lost. This will abort any existing pre-authentication session. 2158 */ 2159void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2160{ 2161 peerkey_deinit(sm); 2162 rsn_preauth_deinit(sm); 2163 pmksa_cache_clear_current(sm); 2164 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2165 sm->dot11RSNA4WayHandshakeFailures++; 2166#ifdef CONFIG_TDLS 2167 wpa_tdls_disassoc(sm); 2168#endif /* CONFIG_TDLS */ 2169} 2170 2171 2172/** 2173 * wpa_sm_set_pmk - Set PMK 2174 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2175 * @pmk: The new PMK 2176 * @pmk_len: The length of the new PMK in bytes 2177 * 2178 * Configure the PMK for WPA state machine. 2179 */ 2180void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) 2181{ 2182 if (sm == NULL) 2183 return; 2184 2185 sm->pmk_len = pmk_len; 2186 os_memcpy(sm->pmk, pmk, pmk_len); 2187 2188#ifdef CONFIG_IEEE80211R 2189 /* Set XXKey to be PSK for FT key derivation */ 2190 sm->xxkey_len = pmk_len; 2191 os_memcpy(sm->xxkey, pmk, pmk_len); 2192#endif /* CONFIG_IEEE80211R */ 2193} 2194 2195 2196/** 2197 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2198 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2199 * 2200 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2201 * will be cleared. 2202 */ 2203void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2204{ 2205 if (sm == NULL) 2206 return; 2207 2208 if (sm->cur_pmksa) { 2209 sm->pmk_len = sm->cur_pmksa->pmk_len; 2210 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2211 } else { 2212 sm->pmk_len = PMK_LEN; 2213 os_memset(sm->pmk, 0, PMK_LEN); 2214 } 2215} 2216 2217 2218/** 2219 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2220 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2221 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2222 */ 2223void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2224{ 2225 if (sm) 2226 sm->fast_reauth = fast_reauth; 2227} 2228 2229 2230/** 2231 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2232 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2233 * @scard_ctx: Context pointer for smartcard related callback functions 2234 */ 2235void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2236{ 2237 if (sm == NULL) 2238 return; 2239 sm->scard_ctx = scard_ctx; 2240 if (sm->preauth_eapol) 2241 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2242} 2243 2244 2245/** 2246 * wpa_sm_set_config - Notification of current configration change 2247 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2248 * @config: Pointer to current network configuration 2249 * 2250 * Notify WPA state machine that configuration has changed. config will be 2251 * stored as a backpointer to network configuration. This can be %NULL to clear 2252 * the stored pointed. 2253 */ 2254void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2255{ 2256 if (!sm) 2257 return; 2258 2259 if (config) { 2260 sm->network_ctx = config->network_ctx; 2261 sm->peerkey_enabled = config->peerkey_enabled; 2262 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2263 sm->proactive_key_caching = config->proactive_key_caching; 2264 sm->eap_workaround = config->eap_workaround; 2265 sm->eap_conf_ctx = config->eap_conf_ctx; 2266 if (config->ssid) { 2267 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2268 sm->ssid_len = config->ssid_len; 2269 } else 2270 sm->ssid_len = 0; 2271 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2272 sm->p2p = config->p2p; 2273 } else { 2274 sm->network_ctx = NULL; 2275 sm->peerkey_enabled = 0; 2276 sm->allowed_pairwise_cipher = 0; 2277 sm->proactive_key_caching = 0; 2278 sm->eap_workaround = 0; 2279 sm->eap_conf_ctx = NULL; 2280 sm->ssid_len = 0; 2281 sm->wpa_ptk_rekey = 0; 2282 sm->p2p = 0; 2283 } 2284} 2285 2286 2287/** 2288 * wpa_sm_set_own_addr - Set own MAC address 2289 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2290 * @addr: Own MAC address 2291 */ 2292void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2293{ 2294 if (sm) 2295 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2296} 2297 2298 2299/** 2300 * wpa_sm_set_ifname - Set network interface name 2301 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2302 * @ifname: Interface name 2303 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2304 */ 2305void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2306 const char *bridge_ifname) 2307{ 2308 if (sm) { 2309 sm->ifname = ifname; 2310 sm->bridge_ifname = bridge_ifname; 2311 } 2312} 2313 2314 2315/** 2316 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2317 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2318 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2319 */ 2320void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2321{ 2322 if (sm) 2323 sm->eapol = eapol; 2324} 2325 2326 2327/** 2328 * wpa_sm_set_param - Set WPA state machine parameters 2329 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2330 * @param: Parameter field 2331 * @value: Parameter value 2332 * Returns: 0 on success, -1 on failure 2333 */ 2334int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2335 unsigned int value) 2336{ 2337 int ret = 0; 2338 2339 if (sm == NULL) 2340 return -1; 2341 2342 switch (param) { 2343 case RSNA_PMK_LIFETIME: 2344 if (value > 0) 2345 sm->dot11RSNAConfigPMKLifetime = value; 2346 else 2347 ret = -1; 2348 break; 2349 case RSNA_PMK_REAUTH_THRESHOLD: 2350 if (value > 0 && value <= 100) 2351 sm->dot11RSNAConfigPMKReauthThreshold = value; 2352 else 2353 ret = -1; 2354 break; 2355 case RSNA_SA_TIMEOUT: 2356 if (value > 0) 2357 sm->dot11RSNAConfigSATimeout = value; 2358 else 2359 ret = -1; 2360 break; 2361 case WPA_PARAM_PROTO: 2362 sm->proto = value; 2363 break; 2364 case WPA_PARAM_PAIRWISE: 2365 sm->pairwise_cipher = value; 2366 break; 2367 case WPA_PARAM_GROUP: 2368 sm->group_cipher = value; 2369 break; 2370 case WPA_PARAM_KEY_MGMT: 2371 sm->key_mgmt = value; 2372 break; 2373#ifdef CONFIG_IEEE80211W 2374 case WPA_PARAM_MGMT_GROUP: 2375 sm->mgmt_group_cipher = value; 2376 break; 2377#endif /* CONFIG_IEEE80211W */ 2378 case WPA_PARAM_RSN_ENABLED: 2379 sm->rsn_enabled = value; 2380 break; 2381 case WPA_PARAM_MFP: 2382 sm->mfp = value; 2383 break; 2384 default: 2385 break; 2386 } 2387 2388 return ret; 2389} 2390 2391 2392/** 2393 * wpa_sm_get_param - Get WPA state machine parameters 2394 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2395 * @param: Parameter field 2396 * Returns: Parameter value 2397 */ 2398unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param) 2399{ 2400 if (sm == NULL) 2401 return 0; 2402 2403 switch (param) { 2404 case RSNA_PMK_LIFETIME: 2405 return sm->dot11RSNAConfigPMKLifetime; 2406 case RSNA_PMK_REAUTH_THRESHOLD: 2407 return sm->dot11RSNAConfigPMKReauthThreshold; 2408 case RSNA_SA_TIMEOUT: 2409 return sm->dot11RSNAConfigSATimeout; 2410 case WPA_PARAM_PROTO: 2411 return sm->proto; 2412 case WPA_PARAM_PAIRWISE: 2413 return sm->pairwise_cipher; 2414 case WPA_PARAM_GROUP: 2415 return sm->group_cipher; 2416 case WPA_PARAM_KEY_MGMT: 2417 return sm->key_mgmt; 2418#ifdef CONFIG_IEEE80211W 2419 case WPA_PARAM_MGMT_GROUP: 2420 return sm->mgmt_group_cipher; 2421#endif /* CONFIG_IEEE80211W */ 2422 case WPA_PARAM_RSN_ENABLED: 2423 return sm->rsn_enabled; 2424 default: 2425 return 0; 2426 } 2427} 2428 2429 2430/** 2431 * wpa_sm_get_status - Get WPA state machine 2432 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2433 * @buf: Buffer for status information 2434 * @buflen: Maximum buffer length 2435 * @verbose: Whether to include verbose status information 2436 * Returns: Number of bytes written to buf. 2437 * 2438 * Query WPA state machine for status information. This function fills in 2439 * a text area with current status information. If the buffer (buf) is not 2440 * large enough, status information will be truncated to fit the buffer. 2441 */ 2442int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 2443 int verbose) 2444{ 2445 char *pos = buf, *end = buf + buflen; 2446 int ret; 2447 2448 ret = os_snprintf(pos, end - pos, 2449 "pairwise_cipher=%s\n" 2450 "group_cipher=%s\n" 2451 "key_mgmt=%s\n", 2452 wpa_cipher_txt(sm->pairwise_cipher), 2453 wpa_cipher_txt(sm->group_cipher), 2454 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 2455 if (ret < 0 || ret >= end - pos) 2456 return pos - buf; 2457 pos += ret; 2458 2459 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { 2460 struct wpa_ie_data rsn; 2461 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) 2462 >= 0 && 2463 rsn.capabilities & (WPA_CAPABILITY_MFPR | 2464 WPA_CAPABILITY_MFPC)) { 2465 ret = os_snprintf(pos, end - pos, "pmf=%d\n", 2466 (rsn.capabilities & 2467 WPA_CAPABILITY_MFPR) ? 2 : 1); 2468 if (ret < 0 || ret >= end - pos) 2469 return pos - buf; 2470 pos += ret; 2471 } 2472 } 2473 2474 return pos - buf; 2475} 2476 2477 2478int wpa_sm_pmf_enabled(struct wpa_sm *sm) 2479{ 2480 struct wpa_ie_data rsn; 2481 2482 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) 2483 return 0; 2484 2485 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && 2486 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) 2487 return 1; 2488 2489 return 0; 2490} 2491 2492 2493/** 2494 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration 2495 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2496 * @wpa_ie: Pointer to buffer for WPA/RSN IE 2497 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer 2498 * Returns: 0 on success, -1 on failure 2499 */ 2500int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, 2501 size_t *wpa_ie_len) 2502{ 2503 int res; 2504 2505 if (sm == NULL) 2506 return -1; 2507 2508 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); 2509 if (res < 0) 2510 return -1; 2511 *wpa_ie_len = res; 2512 2513 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", 2514 wpa_ie, *wpa_ie_len); 2515 2516 if (sm->assoc_wpa_ie == NULL) { 2517 /* 2518 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets 2519 * the correct version of the IE even if PMKSA caching is 2520 * aborted (which would remove PMKID from IE generation). 2521 */ 2522 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); 2523 if (sm->assoc_wpa_ie == NULL) 2524 return -1; 2525 2526 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); 2527 sm->assoc_wpa_ie_len = *wpa_ie_len; 2528 } 2529 2530 return 0; 2531} 2532 2533 2534/** 2535 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq 2536 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2537 * @ie: Pointer to IE data (starting from id) 2538 * @len: IE length 2539 * Returns: 0 on success, -1 on failure 2540 * 2541 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association 2542 * Request frame. The IE will be used to override the default value generated 2543 * with wpa_sm_set_assoc_wpa_ie_default(). 2544 */ 2545int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2546{ 2547 if (sm == NULL) 2548 return -1; 2549 2550 os_free(sm->assoc_wpa_ie); 2551 if (ie == NULL || len == 0) { 2552 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2553 "WPA: clearing own WPA/RSN IE"); 2554 sm->assoc_wpa_ie = NULL; 2555 sm->assoc_wpa_ie_len = 0; 2556 } else { 2557 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); 2558 sm->assoc_wpa_ie = os_malloc(len); 2559 if (sm->assoc_wpa_ie == NULL) 2560 return -1; 2561 2562 os_memcpy(sm->assoc_wpa_ie, ie, len); 2563 sm->assoc_wpa_ie_len = len; 2564 } 2565 2566 return 0; 2567} 2568 2569 2570/** 2571 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp 2572 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2573 * @ie: Pointer to IE data (starting from id) 2574 * @len: IE length 2575 * Returns: 0 on success, -1 on failure 2576 * 2577 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response 2578 * frame. 2579 */ 2580int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2581{ 2582 if (sm == NULL) 2583 return -1; 2584 2585 os_free(sm->ap_wpa_ie); 2586 if (ie == NULL || len == 0) { 2587 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2588 "WPA: clearing AP WPA IE"); 2589 sm->ap_wpa_ie = NULL; 2590 sm->ap_wpa_ie_len = 0; 2591 } else { 2592 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); 2593 sm->ap_wpa_ie = os_malloc(len); 2594 if (sm->ap_wpa_ie == NULL) 2595 return -1; 2596 2597 os_memcpy(sm->ap_wpa_ie, ie, len); 2598 sm->ap_wpa_ie_len = len; 2599 } 2600 2601 return 0; 2602} 2603 2604 2605/** 2606 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp 2607 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2608 * @ie: Pointer to IE data (starting from id) 2609 * @len: IE length 2610 * Returns: 0 on success, -1 on failure 2611 * 2612 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response 2613 * frame. 2614 */ 2615int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2616{ 2617 if (sm == NULL) 2618 return -1; 2619 2620 os_free(sm->ap_rsn_ie); 2621 if (ie == NULL || len == 0) { 2622 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2623 "WPA: clearing AP RSN IE"); 2624 sm->ap_rsn_ie = NULL; 2625 sm->ap_rsn_ie_len = 0; 2626 } else { 2627 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); 2628 sm->ap_rsn_ie = os_malloc(len); 2629 if (sm->ap_rsn_ie == NULL) 2630 return -1; 2631 2632 os_memcpy(sm->ap_rsn_ie, ie, len); 2633 sm->ap_rsn_ie_len = len; 2634 } 2635 2636 return 0; 2637} 2638 2639 2640/** 2641 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE 2642 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2643 * @data: Pointer to data area for parsing results 2644 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure 2645 * 2646 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the 2647 * parsed data into data. 2648 */ 2649int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) 2650{ 2651 if (sm == NULL) 2652 return -1; 2653 2654 if (sm->assoc_wpa_ie == NULL) { 2655 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2656 "WPA: No WPA/RSN IE available from association info"); 2657 return -1; 2658 } 2659 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) 2660 return -2; 2661 return 0; 2662} 2663 2664 2665int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) 2666{ 2667 return pmksa_cache_list(sm->pmksa, buf, len); 2668} 2669 2670 2671void wpa_sm_drop_sa(struct wpa_sm *sm) 2672{ 2673 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 2674 sm->ptk_set = 0; 2675 sm->tptk_set = 0; 2676 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2677 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2678 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2679} 2680 2681 2682int wpa_sm_has_ptk(struct wpa_sm *sm) 2683{ 2684 if (sm == NULL) 2685 return 0; 2686 return sm->ptk_set; 2687} 2688 2689 2690void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 2691{ 2692 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 2693} 2694 2695 2696void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 2697{ 2698 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); 2699} 2700 2701 2702#ifdef CONFIG_WNM 2703int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 2704{ 2705 struct wpa_gtk_data gd; 2706#ifdef CONFIG_IEEE80211W 2707 struct wpa_igtk_kde igd; 2708 u16 keyidx; 2709#endif /* CONFIG_IEEE80211W */ 2710 u16 keyinfo; 2711 u8 keylen; /* plaintext key len */ 2712 u8 *key_rsc; 2713 2714 os_memset(&gd, 0, sizeof(gd)); 2715#ifdef CONFIG_IEEE80211W 2716 os_memset(&igd, 0, sizeof(igd)); 2717#endif /* CONFIG_IEEE80211W */ 2718 2719 keylen = wpa_cipher_key_len(sm->group_cipher); 2720 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); 2721 gd.alg = wpa_cipher_to_alg(sm->group_cipher); 2722 if (gd.alg == WPA_ALG_NONE) { 2723 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 2724 return -1; 2725 } 2726 2727 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 2728 key_rsc = buf + 5; 2729 keyinfo = WPA_GET_LE16(buf + 2); 2730 gd.gtk_len = keylen; 2731 if (gd.gtk_len != buf[4]) { 2732 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 2733 gd.gtk_len, buf[4]); 2734 return -1; 2735 } 2736 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 2737 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 2738 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 2739 2740 os_memcpy(gd.gtk, buf + 13, gd.gtk_len); 2741 2742 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 2743 gd.gtk, gd.gtk_len); 2744 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { 2745 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 2746 "WNM mode"); 2747 return -1; 2748 } 2749#ifdef CONFIG_IEEE80211W 2750 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 2751 os_memcpy(igd.keyid, buf + 2, 2); 2752 os_memcpy(igd.pn, buf + 4, 6); 2753 2754 keyidx = WPA_GET_LE16(igd.keyid); 2755 os_memcpy(igd.igtk, buf + 10, WPA_IGTK_LEN); 2756 2757 wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", 2758 igd.igtk, WPA_IGTK_LEN); 2759 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, 2760 keyidx, 0, igd.pn, sizeof(igd.pn), 2761 igd.igtk, WPA_IGTK_LEN) < 0) { 2762 wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " 2763 "WNM mode"); 2764 return -1; 2765 } 2766#endif /* CONFIG_IEEE80211W */ 2767 } else { 2768 wpa_printf(MSG_DEBUG, "Unknown element id"); 2769 return -1; 2770 } 2771 2772 return 0; 2773} 2774#endif /* CONFIG_WNM */ 2775 2776 2777#ifdef CONFIG_PEERKEY 2778int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr, 2779 const u8 *buf, size_t len) 2780{ 2781 struct wpa_peerkey *peerkey; 2782 2783 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 2784 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 2785 break; 2786 } 2787 2788 if (!peerkey) 2789 return 0; 2790 2791 wpa_sm_rx_eapol(sm, src_addr, buf, len); 2792 2793 return 1; 2794} 2795#endif /* CONFIG_PEERKEY */ 2796 2797 2798#ifdef CONFIG_P2P 2799 2800int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) 2801{ 2802 if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) 2803 return -1; 2804 os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); 2805 return 0; 2806} 2807 2808#endif /* CONFIG_P2P */ 2809