wpa.c revision b36ed7cd946148d829f311de8fe53ea3ffaaffe3
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 (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) 746 return 0; 747 748 if (ie->igtk) { 749 size_t len; 750 const struct wpa_igtk_kde *igtk; 751 u16 keyidx; 752 len = wpa_cipher_key_len(sm->mgmt_group_cipher); 753 if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) 754 return -1; 755 igtk = (const struct wpa_igtk_kde *) ie->igtk; 756 keyidx = WPA_GET_LE16(igtk->keyid); 757 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " 758 "pn %02x%02x%02x%02x%02x%02x", 759 keyidx, MAC2STR(igtk->pn)); 760 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", 761 igtk->igtk, len); 762 if (keyidx > 4095) { 763 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 764 "WPA: Invalid IGTK KeyID %d", keyidx); 765 return -1; 766 } 767 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), 768 broadcast_ether_addr, 769 keyidx, 0, igtk->pn, sizeof(igtk->pn), 770 igtk->igtk, len) < 0) { 771 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 772 "WPA: Failed to configure IGTK to the driver"); 773 return -1; 774 } 775 } 776 777 return 0; 778#else /* CONFIG_IEEE80211W */ 779 return 0; 780#endif /* CONFIG_IEEE80211W */ 781} 782 783 784static void wpa_report_ie_mismatch(struct wpa_sm *sm, 785 const char *reason, const u8 *src_addr, 786 const u8 *wpa_ie, size_t wpa_ie_len, 787 const u8 *rsn_ie, size_t rsn_ie_len) 788{ 789 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", 790 reason, MAC2STR(src_addr)); 791 792 if (sm->ap_wpa_ie) { 793 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", 794 sm->ap_wpa_ie, sm->ap_wpa_ie_len); 795 } 796 if (wpa_ie) { 797 if (!sm->ap_wpa_ie) { 798 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 799 "WPA: No WPA IE in Beacon/ProbeResp"); 800 } 801 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", 802 wpa_ie, wpa_ie_len); 803 } 804 805 if (sm->ap_rsn_ie) { 806 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", 807 sm->ap_rsn_ie, sm->ap_rsn_ie_len); 808 } 809 if (rsn_ie) { 810 if (!sm->ap_rsn_ie) { 811 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 812 "WPA: No RSN IE in Beacon/ProbeResp"); 813 } 814 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", 815 rsn_ie, rsn_ie_len); 816 } 817 818 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); 819} 820 821 822#ifdef CONFIG_IEEE80211R 823 824static int ft_validate_mdie(struct wpa_sm *sm, 825 const unsigned char *src_addr, 826 struct wpa_eapol_ie_parse *ie, 827 const u8 *assoc_resp_mdie) 828{ 829 struct rsn_mdie *mdie; 830 831 mdie = (struct rsn_mdie *) (ie->mdie + 2); 832 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || 833 os_memcmp(mdie->mobility_domain, sm->mobility_domain, 834 MOBILITY_DOMAIN_ID_LEN) != 0) { 835 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " 836 "not match with the current mobility domain"); 837 return -1; 838 } 839 840 if (assoc_resp_mdie && 841 (assoc_resp_mdie[1] != ie->mdie[1] || 842 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { 843 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); 844 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", 845 ie->mdie, 2 + ie->mdie[1]); 846 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", 847 assoc_resp_mdie, 2 + assoc_resp_mdie[1]); 848 return -1; 849 } 850 851 return 0; 852} 853 854 855static int ft_validate_ftie(struct wpa_sm *sm, 856 const unsigned char *src_addr, 857 struct wpa_eapol_ie_parse *ie, 858 const u8 *assoc_resp_ftie) 859{ 860 if (ie->ftie == NULL) { 861 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 862 "FT: No FTIE in EAPOL-Key msg 3/4"); 863 return -1; 864 } 865 866 if (assoc_resp_ftie == NULL) 867 return 0; 868 869 if (assoc_resp_ftie[1] != ie->ftie[1] || 870 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { 871 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); 872 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", 873 ie->ftie, 2 + ie->ftie[1]); 874 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", 875 assoc_resp_ftie, 2 + assoc_resp_ftie[1]); 876 return -1; 877 } 878 879 return 0; 880} 881 882 883static int ft_validate_rsnie(struct wpa_sm *sm, 884 const unsigned char *src_addr, 885 struct wpa_eapol_ie_parse *ie) 886{ 887 struct wpa_ie_data rsn; 888 889 if (!ie->rsn_ie) 890 return 0; 891 892 /* 893 * Verify that PMKR1Name from EAPOL-Key message 3/4 894 * matches with the value we derived. 895 */ 896 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || 897 rsn.num_pmkid != 1 || rsn.pmkid == NULL) { 898 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " 899 "FT 4-way handshake message 3/4"); 900 return -1; 901 } 902 903 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { 904 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 905 "FT: PMKR1Name mismatch in " 906 "FT 4-way handshake message 3/4"); 907 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", 908 rsn.pmkid, WPA_PMK_NAME_LEN); 909 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", 910 sm->pmk_r1_name, WPA_PMK_NAME_LEN); 911 return -1; 912 } 913 914 return 0; 915} 916 917 918static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, 919 const unsigned char *src_addr, 920 struct wpa_eapol_ie_parse *ie) 921{ 922 const u8 *pos, *end, *mdie = NULL, *ftie = NULL; 923 924 if (sm->assoc_resp_ies) { 925 pos = sm->assoc_resp_ies; 926 end = pos + sm->assoc_resp_ies_len; 927 while (pos + 2 < end) { 928 if (pos + 2 + pos[1] > end) 929 break; 930 switch (*pos) { 931 case WLAN_EID_MOBILITY_DOMAIN: 932 mdie = pos; 933 break; 934 case WLAN_EID_FAST_BSS_TRANSITION: 935 ftie = pos; 936 break; 937 } 938 pos += 2 + pos[1]; 939 } 940 } 941 942 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || 943 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || 944 ft_validate_rsnie(sm, src_addr, ie) < 0) 945 return -1; 946 947 return 0; 948} 949 950#endif /* CONFIG_IEEE80211R */ 951 952 953static int wpa_supplicant_validate_ie(struct wpa_sm *sm, 954 const unsigned char *src_addr, 955 struct wpa_eapol_ie_parse *ie) 956{ 957 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { 958 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 959 "WPA: No WPA/RSN IE for this AP known. " 960 "Trying to get from scan results"); 961 if (wpa_sm_get_beacon_ie(sm) < 0) { 962 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 963 "WPA: Could not find AP from " 964 "the scan results"); 965 } else { 966 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, 967 "WPA: Found the current AP from " 968 "updated scan results"); 969 } 970 } 971 972 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && 973 (sm->ap_wpa_ie || sm->ap_rsn_ie)) { 974 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 975 "with IE in Beacon/ProbeResp (no IE?)", 976 src_addr, ie->wpa_ie, ie->wpa_ie_len, 977 ie->rsn_ie, ie->rsn_ie_len); 978 return -1; 979 } 980 981 if ((ie->wpa_ie && sm->ap_wpa_ie && 982 (ie->wpa_ie_len != sm->ap_wpa_ie_len || 983 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || 984 (ie->rsn_ie && sm->ap_rsn_ie && 985 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), 986 sm->ap_rsn_ie, sm->ap_rsn_ie_len, 987 ie->rsn_ie, ie->rsn_ie_len))) { 988 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 989 "with IE in Beacon/ProbeResp", 990 src_addr, ie->wpa_ie, ie->wpa_ie_len, 991 ie->rsn_ie, ie->rsn_ie_len); 992 return -1; 993 } 994 995 if (sm->proto == WPA_PROTO_WPA && 996 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { 997 wpa_report_ie_mismatch(sm, "Possible downgrade attack " 998 "detected - RSN was enabled and RSN IE " 999 "was in msg 3/4, but not in " 1000 "Beacon/ProbeResp", 1001 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1002 ie->rsn_ie, ie->rsn_ie_len); 1003 return -1; 1004 } 1005 1006#ifdef CONFIG_IEEE80211R 1007 if (wpa_key_mgmt_ft(sm->key_mgmt) && 1008 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) 1009 return -1; 1010#endif /* CONFIG_IEEE80211R */ 1011 1012 return 0; 1013} 1014 1015 1016/** 1017 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake 1018 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1019 * @dst: Destination address for the frame 1020 * @key: Pointer to the EAPOL-Key frame header 1021 * @ver: Version bits from EAPOL-Key Key Info 1022 * @key_info: Key Info 1023 * @kde: KDEs to include the EAPOL-Key frame 1024 * @kde_len: Length of KDEs 1025 * @ptk: PTK to use for keyed hash and encryption 1026 * Returns: 0 on success, -1 on failure 1027 */ 1028int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 1029 const struct wpa_eapol_key *key, 1030 u16 ver, u16 key_info, 1031 const u8 *kde, size_t kde_len, 1032 struct wpa_ptk *ptk) 1033{ 1034 size_t rlen; 1035 struct wpa_eapol_key *reply; 1036 u8 *rbuf; 1037 1038 if (kde) 1039 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len); 1040 1041 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1042 sizeof(*reply) + kde_len, 1043 &rlen, (void *) &reply); 1044 if (rbuf == NULL) 1045 return -1; 1046 1047 reply->type = (sm->proto == WPA_PROTO_RSN || 1048 sm->proto == WPA_PROTO_OSEN) ? 1049 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1050 key_info &= WPA_KEY_INFO_SECURE; 1051 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; 1052 WPA_PUT_BE16(reply->key_info, key_info); 1053 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1054 WPA_PUT_BE16(reply->key_length, 0); 1055 else 1056 os_memcpy(reply->key_length, key->key_length, 2); 1057 os_memcpy(reply->replay_counter, key->replay_counter, 1058 WPA_REPLAY_COUNTER_LEN); 1059 1060 WPA_PUT_BE16(reply->key_data_length, kde_len); 1061 if (kde) 1062 os_memcpy(reply + 1, kde, kde_len); 1063 1064 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); 1065 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, 1066 rbuf, rlen, reply->key_mic); 1067 1068 return 0; 1069} 1070 1071 1072static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, 1073 const struct wpa_eapol_key *key, 1074 u16 ver) 1075{ 1076 u16 key_info, keylen, len; 1077 const u8 *pos; 1078 struct wpa_eapol_ie_parse ie; 1079 1080 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 1081 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " 1082 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); 1083 1084 key_info = WPA_GET_BE16(key->key_info); 1085 1086 pos = (const u8 *) (key + 1); 1087 len = WPA_GET_BE16(key->key_data_length); 1088 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len); 1089 if (wpa_supplicant_parse_ies(pos, len, &ie) < 0) 1090 goto failed; 1091 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1092 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1093 "WPA: GTK IE in unencrypted key data"); 1094 goto failed; 1095 } 1096#ifdef CONFIG_IEEE80211W 1097 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1098 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1099 "WPA: IGTK KDE in unencrypted key data"); 1100 goto failed; 1101 } 1102 1103 if (ie.igtk && 1104 wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && 1105 ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + 1106 (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { 1107 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1108 "WPA: Invalid IGTK KDE length %lu", 1109 (unsigned long) ie.igtk_len); 1110 goto failed; 1111 } 1112#endif /* CONFIG_IEEE80211W */ 1113 1114 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1115 goto failed; 1116 1117 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1118 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1119 "WPA: ANonce from message 1 of 4-Way Handshake " 1120 "differs from 3 of 4-Way Handshake - drop packet (src=" 1121 MACSTR ")", MAC2STR(sm->bssid)); 1122 goto failed; 1123 } 1124 1125 keylen = WPA_GET_BE16(key->key_length); 1126 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { 1127 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1128 "WPA: Invalid %s key length %d (src=" MACSTR 1129 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, 1130 MAC2STR(sm->bssid)); 1131 goto failed; 1132 } 1133 1134#ifdef CONFIG_P2P 1135 if (ie.ip_addr_alloc) { 1136 os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); 1137 wpa_hexdump(MSG_DEBUG, "P2P: IP address info", 1138 sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); 1139 } 1140#endif /* CONFIG_P2P */ 1141 1142 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1143 NULL, 0, &sm->ptk)) { 1144 goto failed; 1145 } 1146 1147 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1148 * for the next 4-Way Handshake. If msg 3 is received again, the old 1149 * SNonce will still be used to avoid changing PTK. */ 1150 sm->renew_snonce = 1; 1151 1152 if (key_info & WPA_KEY_INFO_INSTALL) { 1153 if (wpa_supplicant_install_ptk(sm, key)) 1154 goto failed; 1155 } 1156 1157 if (key_info & WPA_KEY_INFO_SECURE) { 1158 wpa_sm_mlme_setprotection( 1159 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1160 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1161 eapol_sm_notify_portValid(sm->eapol, TRUE); 1162 } 1163 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1164 1165 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { 1166 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1167 key_info & WPA_KEY_INFO_SECURE); 1168 } else if (ie.gtk && 1169 wpa_supplicant_pairwise_gtk(sm, key, 1170 ie.gtk, ie.gtk_len, key_info) < 0) { 1171 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1172 "RSN: Failed to configure GTK"); 1173 goto failed; 1174 } 1175 1176 if (ieee80211w_set_keys(sm, &ie) < 0) { 1177 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1178 "RSN: Failed to configure IGTK"); 1179 goto failed; 1180 } 1181 1182 if (ie.gtk) 1183 wpa_sm_set_rekey_offload(sm); 1184 1185 return; 1186 1187failed: 1188 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1189} 1190 1191 1192static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1193 const u8 *keydata, 1194 size_t keydatalen, 1195 u16 key_info, 1196 struct wpa_gtk_data *gd) 1197{ 1198 int maxkeylen; 1199 struct wpa_eapol_ie_parse ie; 1200 1201 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); 1202 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1203 return -1; 1204 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1205 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1206 "WPA: GTK IE in unencrypted key data"); 1207 return -1; 1208 } 1209 if (ie.gtk == NULL) { 1210 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1211 "WPA: No GTK IE in Group Key msg 1/2"); 1212 return -1; 1213 } 1214 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1215 1216 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1217 gd->gtk_len, maxkeylen, 1218 &gd->key_rsc_len, &gd->alg)) 1219 return -1; 1220 1221 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", 1222 ie.gtk, ie.gtk_len); 1223 gd->keyidx = ie.gtk[0] & 0x3; 1224 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1225 !!(ie.gtk[0] & BIT(2))); 1226 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1227 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1228 "RSN: Too long GTK in GTK IE (len=%lu)", 1229 (unsigned long) ie.gtk_len - 2); 1230 return -1; 1231 } 1232 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1233 1234 if (ieee80211w_set_keys(sm, &ie) < 0) 1235 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1236 "RSN: Failed to configure IGTK"); 1237 1238 return 0; 1239} 1240 1241 1242static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1243 const struct wpa_eapol_key *key, 1244 size_t keydatalen, int key_info, 1245 size_t extra_len, u16 ver, 1246 struct wpa_gtk_data *gd) 1247{ 1248 size_t maxkeylen; 1249 u8 ek[32]; 1250 1251 gd->gtk_len = WPA_GET_BE16(key->key_length); 1252 maxkeylen = keydatalen; 1253 if (keydatalen > extra_len) { 1254 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1255 "WPA: Truncated EAPOL-Key packet: " 1256 "key_data_length=%lu > extra_len=%lu", 1257 (unsigned long) keydatalen, (unsigned long) extra_len); 1258 return -1; 1259 } 1260 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1261 if (maxkeylen < 8) { 1262 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1263 "WPA: Too short maxkeylen (%lu)", 1264 (unsigned long) maxkeylen); 1265 return -1; 1266 } 1267 maxkeylen -= 8; 1268 } 1269 1270 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1271 gd->gtk_len, maxkeylen, 1272 &gd->key_rsc_len, &gd->alg)) 1273 return -1; 1274 1275 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1276 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1277 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1278 os_memcpy(ek, key->key_iv, 16); 1279 os_memcpy(ek + 16, sm->ptk.kek, 16); 1280 if (keydatalen > sizeof(gd->gtk)) { 1281 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1282 "WPA: RC4 key data too long (%lu)", 1283 (unsigned long) keydatalen); 1284 return -1; 1285 } 1286 os_memcpy(gd->gtk, key + 1, keydatalen); 1287 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { 1288 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1289 "WPA: RC4 failed"); 1290 return -1; 1291 } 1292 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1293 if (keydatalen % 8) { 1294 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1295 "WPA: Unsupported AES-WRAP len %lu", 1296 (unsigned long) keydatalen); 1297 return -1; 1298 } 1299 if (maxkeylen > sizeof(gd->gtk)) { 1300 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1301 "WPA: AES-WRAP key data " 1302 "too long (keydatalen=%lu maxkeylen=%lu)", 1303 (unsigned long) keydatalen, 1304 (unsigned long) maxkeylen); 1305 return -1; 1306 } 1307 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, 1308 (const u8 *) (key + 1), gd->gtk)) { 1309 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1310 "WPA: AES unwrap failed - could not decrypt " 1311 "GTK"); 1312 return -1; 1313 } 1314 } else { 1315 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1316 "WPA: Unsupported key_info type %d", ver); 1317 return -1; 1318 } 1319 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1320 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1321 return 0; 1322} 1323 1324 1325static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1326 const struct wpa_eapol_key *key, 1327 int ver, u16 key_info) 1328{ 1329 size_t rlen; 1330 struct wpa_eapol_key *reply; 1331 u8 *rbuf; 1332 1333 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1334 sizeof(*reply), &rlen, (void *) &reply); 1335 if (rbuf == NULL) 1336 return -1; 1337 1338 reply->type = (sm->proto == WPA_PROTO_RSN || 1339 sm->proto == WPA_PROTO_OSEN) ? 1340 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1341 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1342 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; 1343 WPA_PUT_BE16(reply->key_info, key_info); 1344 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1345 WPA_PUT_BE16(reply->key_length, 0); 1346 else 1347 os_memcpy(reply->key_length, key->key_length, 2); 1348 os_memcpy(reply->replay_counter, key->replay_counter, 1349 WPA_REPLAY_COUNTER_LEN); 1350 1351 WPA_PUT_BE16(reply->key_data_length, 0); 1352 1353 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1354 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, 1355 rbuf, rlen, reply->key_mic); 1356 1357 return 0; 1358} 1359 1360 1361static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1362 const unsigned char *src_addr, 1363 const struct wpa_eapol_key *key, 1364 int extra_len, u16 ver) 1365{ 1366 u16 key_info, keydatalen; 1367 int rekey, ret; 1368 struct wpa_gtk_data gd; 1369 1370 os_memset(&gd, 0, sizeof(gd)); 1371 1372 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1373 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1374 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1375 1376 key_info = WPA_GET_BE16(key->key_info); 1377 keydatalen = WPA_GET_BE16(key->key_data_length); 1378 1379 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 1380 ret = wpa_supplicant_process_1_of_2_rsn(sm, 1381 (const u8 *) (key + 1), 1382 keydatalen, key_info, 1383 &gd); 1384 } else { 1385 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, 1386 key_info, extra_len, 1387 ver, &gd); 1388 } 1389 1390 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1391 1392 if (ret) 1393 goto failed; 1394 1395 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || 1396 wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) 1397 goto failed; 1398 1399 if (rekey) { 1400 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " 1401 "completed with " MACSTR " [GTK=%s]", 1402 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1403 wpa_sm_cancel_auth_timeout(sm); 1404 wpa_sm_set_state(sm, WPA_COMPLETED); 1405 } else { 1406 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1407 key_info & 1408 WPA_KEY_INFO_SECURE); 1409 } 1410 1411 wpa_sm_set_rekey_offload(sm); 1412 1413 return; 1414 1415failed: 1416 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1417} 1418 1419 1420static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1421 struct wpa_eapol_key *key, 1422 u16 ver, 1423 const u8 *buf, size_t len) 1424{ 1425 u8 mic[16]; 1426 int ok = 0; 1427 1428 os_memcpy(mic, key->key_mic, 16); 1429 if (sm->tptk_set) { 1430 os_memset(key->key_mic, 0, 16); 1431 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, 1432 key->key_mic); 1433 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1434 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1435 "WPA: Invalid EAPOL-Key MIC " 1436 "when using TPTK - ignoring TPTK"); 1437 } else { 1438 ok = 1; 1439 sm->tptk_set = 0; 1440 sm->ptk_set = 1; 1441 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 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 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1495 "WPA: RC4 failed"); 1496 return -1; 1497 } 1498 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1499 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || 1500 sm->key_mgmt == WPA_KEY_MGMT_OSEN) { 1501 u8 *buf; 1502 if (keydatalen % 8) { 1503 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1504 "WPA: Unsupported AES-WRAP len %d", 1505 keydatalen); 1506 return -1; 1507 } 1508 keydatalen -= 8; /* AES-WRAP adds 8 bytes */ 1509 buf = os_malloc(keydatalen); 1510 if (buf == NULL) { 1511 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1512 "WPA: No memory for AES-UNWRAP buffer"); 1513 return -1; 1514 } 1515 if (aes_unwrap(sm->ptk.kek, keydatalen / 8, 1516 (u8 *) (key + 1), buf)) { 1517 os_free(buf); 1518 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1519 "WPA: AES unwrap failed - " 1520 "could not decrypt EAPOL-Key key data"); 1521 return -1; 1522 } 1523 os_memcpy(key + 1, buf, keydatalen); 1524 os_free(buf); 1525 WPA_PUT_BE16(key->key_data_length, keydatalen); 1526 } else { 1527 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1528 "WPA: Unsupported key_info type %d", ver); 1529 return -1; 1530 } 1531 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 1532 (u8 *) (key + 1), keydatalen); 1533 return 0; 1534} 1535 1536 1537/** 1538 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 1539 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1540 */ 1541void wpa_sm_aborted_cached(struct wpa_sm *sm) 1542{ 1543 if (sm && sm->cur_pmksa) { 1544 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1545 "RSN: Cancelling PMKSA caching attempt"); 1546 sm->cur_pmksa = NULL; 1547 } 1548} 1549 1550 1551static void wpa_eapol_key_dump(struct wpa_sm *sm, 1552 const struct wpa_eapol_key *key) 1553{ 1554#ifndef CONFIG_NO_STDOUT_DEBUG 1555 u16 key_info = WPA_GET_BE16(key->key_info); 1556 1557 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 1558 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1559 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 1560 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 1561 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1562 WPA_KEY_INFO_KEY_INDEX_SHIFT, 1563 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 1564 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 1565 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 1566 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 1567 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 1568 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 1569 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 1570 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 1571 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 1572 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1573 " key_length=%u key_data_length=%u", 1574 WPA_GET_BE16(key->key_length), 1575 WPA_GET_BE16(key->key_data_length)); 1576 wpa_hexdump(MSG_DEBUG, " replay_counter", 1577 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 1578 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 1579 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 1580 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 1581 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 1582 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); 1583#endif /* CONFIG_NO_STDOUT_DEBUG */ 1584} 1585 1586 1587/** 1588 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 1589 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1590 * @src_addr: Source MAC address of the EAPOL packet 1591 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 1592 * @len: Length of the EAPOL frame 1593 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 1594 * 1595 * This function is called for each received EAPOL frame. Other than EAPOL-Key 1596 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 1597 * only processing WPA and WPA2 EAPOL-Key frames. 1598 * 1599 * The received EAPOL-Key packets are validated and valid packets are replied 1600 * to. In addition, key material (PTK, GTK) is configured at the end of a 1601 * successful key handshake. 1602 */ 1603int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 1604 const u8 *buf, size_t len) 1605{ 1606 size_t plen, data_len, extra_len; 1607 struct ieee802_1x_hdr *hdr; 1608 struct wpa_eapol_key *key; 1609 u16 key_info, ver; 1610 u8 *tmp; 1611 int ret = -1; 1612 struct wpa_peerkey *peerkey = NULL; 1613 1614#ifdef CONFIG_IEEE80211R 1615 sm->ft_completed = 0; 1616#endif /* CONFIG_IEEE80211R */ 1617 1618 if (len < sizeof(*hdr) + sizeof(*key)) { 1619 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1620 "WPA: EAPOL frame too short to be a WPA " 1621 "EAPOL-Key (len %lu, expecting at least %lu)", 1622 (unsigned long) len, 1623 (unsigned long) sizeof(*hdr) + sizeof(*key)); 1624 return 0; 1625 } 1626 1627 tmp = os_malloc(len); 1628 if (tmp == NULL) 1629 return -1; 1630 os_memcpy(tmp, buf, len); 1631 1632 hdr = (struct ieee802_1x_hdr *) tmp; 1633 key = (struct wpa_eapol_key *) (hdr + 1); 1634 plen = be_to_host16(hdr->length); 1635 data_len = plen + sizeof(*hdr); 1636 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1637 "IEEE 802.1X RX: version=%d type=%d length=%lu", 1638 hdr->version, hdr->type, (unsigned long) plen); 1639 1640 if (hdr->version < EAPOL_VERSION) { 1641 /* TODO: backwards compatibility */ 1642 } 1643 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 1644 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1645 "WPA: EAPOL frame (type %u) discarded, " 1646 "not a Key frame", hdr->type); 1647 ret = 0; 1648 goto out; 1649 } 1650 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { 1651 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1652 "WPA: EAPOL frame payload size %lu " 1653 "invalid (frame size %lu)", 1654 (unsigned long) plen, (unsigned long) len); 1655 ret = 0; 1656 goto out; 1657 } 1658 1659 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) 1660 { 1661 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1662 "WPA: EAPOL-Key type (%d) unknown, discarded", 1663 key->type); 1664 ret = 0; 1665 goto out; 1666 } 1667 wpa_eapol_key_dump(sm, key); 1668 1669 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 1670 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len); 1671 if (data_len < len) { 1672 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1673 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 1674 (unsigned long) len - data_len); 1675 } 1676 key_info = WPA_GET_BE16(key->key_info); 1677 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 1678 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 1679#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 1680 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1681#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 1682 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && 1683 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1684 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1685 "WPA: Unsupported EAPOL-Key descriptor version %d", 1686 ver); 1687 goto out; 1688 } 1689 1690 if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && 1691 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { 1692 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1693 "OSEN: Unsupported EAPOL-Key descriptor version %d", 1694 ver); 1695 goto out; 1696 } 1697 1698#ifdef CONFIG_IEEE80211R 1699 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 1700 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 1701 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1702 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1703 "FT: AP did not use AES-128-CMAC"); 1704 goto out; 1705 } 1706 } else 1707#endif /* CONFIG_IEEE80211R */ 1708#ifdef CONFIG_IEEE80211W 1709 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 1710 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1711 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 1712 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1713 "WPA: AP did not use the " 1714 "negotiated AES-128-CMAC"); 1715 goto out; 1716 } 1717 } else 1718#endif /* CONFIG_IEEE80211W */ 1719 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 1720 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1721 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1722 "WPA: CCMP is used, but EAPOL-Key " 1723 "descriptor version (%d) is not 2", ver); 1724 if (sm->group_cipher != WPA_CIPHER_CCMP && 1725 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 1726 /* Earlier versions of IEEE 802.11i did not explicitly 1727 * require version 2 descriptor for all EAPOL-Key 1728 * packets, so allow group keys to use version 1 if 1729 * CCMP is not used for them. */ 1730 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1731 "WPA: Backwards compatibility: allow invalid " 1732 "version for non-CCMP group keys"); 1733 } else 1734 goto out; 1735 } 1736 if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 1737 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1738 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1739 "WPA: GCMP is used, but EAPOL-Key " 1740 "descriptor version (%d) is not 2", ver); 1741 goto out; 1742 } 1743 1744#ifdef CONFIG_PEERKEY 1745 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 1746 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 1747 break; 1748 } 1749 1750 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { 1751 if (!peerkey->initiator && peerkey->replay_counter_set && 1752 os_memcmp(key->replay_counter, peerkey->replay_counter, 1753 WPA_REPLAY_COUNTER_LEN) <= 0) { 1754 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1755 "RSN: EAPOL-Key Replay Counter did not " 1756 "increase (STK) - dropping packet"); 1757 goto out; 1758 } else if (peerkey->initiator) { 1759 u8 _tmp[WPA_REPLAY_COUNTER_LEN]; 1760 os_memcpy(_tmp, key->replay_counter, 1761 WPA_REPLAY_COUNTER_LEN); 1762 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); 1763 if (os_memcmp(_tmp, peerkey->replay_counter, 1764 WPA_REPLAY_COUNTER_LEN) != 0) { 1765 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1766 "RSN: EAPOL-Key Replay " 1767 "Counter did not match (STK) - " 1768 "dropping packet"); 1769 goto out; 1770 } 1771 } 1772 } 1773 1774 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { 1775 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1776 "RSN: Ack bit in key_info from STK peer"); 1777 goto out; 1778 } 1779#endif /* CONFIG_PEERKEY */ 1780 1781 if (!peerkey && sm->rx_replay_counter_set && 1782 os_memcmp(key->replay_counter, sm->rx_replay_counter, 1783 WPA_REPLAY_COUNTER_LEN) <= 0) { 1784 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1785 "WPA: EAPOL-Key Replay Counter did not increase - " 1786 "dropping packet"); 1787 goto out; 1788 } 1789 1790 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) 1791#ifdef CONFIG_PEERKEY 1792 && (peerkey == NULL || !peerkey->initiator) 1793#endif /* CONFIG_PEERKEY */ 1794 ) { 1795 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1796 "WPA: No Ack bit in key_info"); 1797 goto out; 1798 } 1799 1800 if (key_info & WPA_KEY_INFO_REQUEST) { 1801 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1802 "WPA: EAPOL-Key with Request bit - dropped"); 1803 goto out; 1804 } 1805 1806 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && 1807 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 1808 goto out; 1809 1810#ifdef CONFIG_PEERKEY 1811 if ((key_info & WPA_KEY_INFO_MIC) && peerkey && 1812 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) 1813 goto out; 1814#endif /* CONFIG_PEERKEY */ 1815 1816 extra_len = data_len - sizeof(*hdr) - sizeof(*key); 1817 1818 if (WPA_GET_BE16(key->key_data_length) > extra_len) { 1819 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 1820 "frame - key_data overflow (%d > %lu)", 1821 WPA_GET_BE16(key->key_data_length), 1822 (unsigned long) extra_len); 1823 goto out; 1824 } 1825 extra_len = WPA_GET_BE16(key->key_data_length); 1826 1827 if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && 1828 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1829 if (wpa_supplicant_decrypt_key_data(sm, key, ver)) 1830 goto out; 1831 extra_len = WPA_GET_BE16(key->key_data_length); 1832 } 1833 1834 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 1835 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 1836 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1837 "WPA: Ignored EAPOL-Key (Pairwise) with " 1838 "non-zero key index"); 1839 goto out; 1840 } 1841 if (peerkey) { 1842 /* PeerKey 4-Way Handshake */ 1843 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); 1844 } else if (key_info & WPA_KEY_INFO_MIC) { 1845 /* 3/4 4-Way Handshake */ 1846 wpa_supplicant_process_3_of_4(sm, key, ver); 1847 } else { 1848 /* 1/4 4-Way Handshake */ 1849 wpa_supplicant_process_1_of_4(sm, src_addr, key, 1850 ver); 1851 } 1852 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 1853 /* PeerKey SMK Handshake */ 1854 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info, 1855 ver); 1856 } else { 1857 if (key_info & WPA_KEY_INFO_MIC) { 1858 /* 1/2 Group Key Handshake */ 1859 wpa_supplicant_process_1_of_2(sm, src_addr, key, 1860 extra_len, ver); 1861 } else { 1862 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1863 "WPA: EAPOL-Key (Group) without Mic bit - " 1864 "dropped"); 1865 } 1866 } 1867 1868 ret = 1; 1869 1870out: 1871 os_free(tmp); 1872 return ret; 1873} 1874 1875 1876#ifdef CONFIG_CTRL_IFACE 1877static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 1878{ 1879 switch (sm->key_mgmt) { 1880 case WPA_KEY_MGMT_IEEE8021X: 1881 return ((sm->proto == WPA_PROTO_RSN || 1882 sm->proto == WPA_PROTO_OSEN) ? 1883 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 1884 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 1885 case WPA_KEY_MGMT_PSK: 1886 return (sm->proto == WPA_PROTO_RSN ? 1887 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 1888 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 1889#ifdef CONFIG_IEEE80211R 1890 case WPA_KEY_MGMT_FT_IEEE8021X: 1891 return RSN_AUTH_KEY_MGMT_FT_802_1X; 1892 case WPA_KEY_MGMT_FT_PSK: 1893 return RSN_AUTH_KEY_MGMT_FT_PSK; 1894#endif /* CONFIG_IEEE80211R */ 1895#ifdef CONFIG_IEEE80211W 1896 case WPA_KEY_MGMT_IEEE8021X_SHA256: 1897 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 1898 case WPA_KEY_MGMT_PSK_SHA256: 1899 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 1900#endif /* CONFIG_IEEE80211W */ 1901 case WPA_KEY_MGMT_CCKM: 1902 return (sm->proto == WPA_PROTO_RSN ? 1903 RSN_AUTH_KEY_MGMT_CCKM: 1904 WPA_AUTH_KEY_MGMT_CCKM); 1905 case WPA_KEY_MGMT_WPA_NONE: 1906 return WPA_AUTH_KEY_MGMT_NONE; 1907 default: 1908 return 0; 1909 } 1910} 1911 1912 1913#define RSN_SUITE "%02x-%02x-%02x-%d" 1914#define RSN_SUITE_ARG(s) \ 1915((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 1916 1917/** 1918 * wpa_sm_get_mib - Dump text list of MIB entries 1919 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1920 * @buf: Buffer for the list 1921 * @buflen: Length of the buffer 1922 * Returns: Number of bytes written to buffer 1923 * 1924 * This function is used fetch dot11 MIB variables. 1925 */ 1926int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 1927{ 1928 char pmkid_txt[PMKID_LEN * 2 + 1]; 1929 int rsna, ret; 1930 size_t len; 1931 1932 if (sm->cur_pmksa) { 1933 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 1934 sm->cur_pmksa->pmkid, PMKID_LEN); 1935 } else 1936 pmkid_txt[0] = '\0'; 1937 1938 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 1939 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 1940 sm->proto == WPA_PROTO_RSN) 1941 rsna = 1; 1942 else 1943 rsna = 0; 1944 1945 ret = os_snprintf(buf, buflen, 1946 "dot11RSNAOptionImplemented=TRUE\n" 1947 "dot11RSNAPreauthenticationImplemented=TRUE\n" 1948 "dot11RSNAEnabled=%s\n" 1949 "dot11RSNAPreauthenticationEnabled=%s\n" 1950 "dot11RSNAConfigVersion=%d\n" 1951 "dot11RSNAConfigPairwiseKeysSupported=5\n" 1952 "dot11RSNAConfigGroupCipherSize=%d\n" 1953 "dot11RSNAConfigPMKLifetime=%d\n" 1954 "dot11RSNAConfigPMKReauthThreshold=%d\n" 1955 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 1956 "dot11RSNAConfigSATimeout=%d\n", 1957 rsna ? "TRUE" : "FALSE", 1958 rsna ? "TRUE" : "FALSE", 1959 RSN_VERSION, 1960 wpa_cipher_key_len(sm->group_cipher) * 8, 1961 sm->dot11RSNAConfigPMKLifetime, 1962 sm->dot11RSNAConfigPMKReauthThreshold, 1963 sm->dot11RSNAConfigSATimeout); 1964 if (ret < 0 || (size_t) ret >= buflen) 1965 return 0; 1966 len = ret; 1967 1968 ret = os_snprintf( 1969 buf + len, buflen - len, 1970 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 1971 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 1972 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 1973 "dot11RSNAPMKIDUsed=%s\n" 1974 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 1975 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 1976 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 1977 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 1978 "dot11RSNA4WayHandshakeFailures=%u\n", 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 pmkid_txt, 1985 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1986 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1987 sm->pairwise_cipher)), 1988 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1989 sm->group_cipher)), 1990 sm->dot11RSNA4WayHandshakeFailures); 1991 if (ret >= 0 && (size_t) ret < buflen) 1992 len += ret; 1993 1994 return (int) len; 1995} 1996#endif /* CONFIG_CTRL_IFACE */ 1997 1998 1999static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 2000 void *ctx, enum pmksa_free_reason reason) 2001{ 2002 struct wpa_sm *sm = ctx; 2003 int deauth = 0; 2004 2005 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " 2006 MACSTR " reason=%d", MAC2STR(entry->aa), reason); 2007 2008 if (sm->cur_pmksa == entry) { 2009 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2010 "RSN: %s current PMKSA entry", 2011 reason == PMKSA_REPLACE ? "replaced" : "removed"); 2012 pmksa_cache_clear_current(sm); 2013 2014 /* 2015 * If an entry is simply being replaced, there's no need to 2016 * deauthenticate because it will be immediately re-added. 2017 * This happens when EAP authentication is completed again 2018 * (reauth or failed PMKSA caching attempt). 2019 */ 2020 if (reason != PMKSA_REPLACE) 2021 deauth = 1; 2022 } 2023 2024 if (reason == PMKSA_EXPIRE && 2025 (sm->pmk_len == entry->pmk_len && 2026 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2027 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2028 "RSN: deauthenticating due to expired PMK"); 2029 pmksa_cache_clear_current(sm); 2030 deauth = 1; 2031 } 2032 2033 if (deauth) { 2034 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2035 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2036 } 2037} 2038 2039 2040/** 2041 * wpa_sm_init - Initialize WPA state machine 2042 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2043 * Returns: Pointer to the allocated WPA state machine data 2044 * 2045 * This function is used to allocate a new WPA state machine and the returned 2046 * value is passed to all WPA state machine calls. 2047 */ 2048struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2049{ 2050 struct wpa_sm *sm; 2051 2052 sm = os_zalloc(sizeof(*sm)); 2053 if (sm == NULL) 2054 return NULL; 2055 dl_list_init(&sm->pmksa_candidates); 2056 sm->renew_snonce = 1; 2057 sm->ctx = ctx; 2058 2059 sm->dot11RSNAConfigPMKLifetime = 43200; 2060 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2061 sm->dot11RSNAConfigSATimeout = 60; 2062 2063 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2064 if (sm->pmksa == NULL) { 2065 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2066 "RSN: PMKSA cache initialization failed"); 2067 os_free(sm); 2068 return NULL; 2069 } 2070 2071 return sm; 2072} 2073 2074 2075/** 2076 * wpa_sm_deinit - Deinitialize WPA state machine 2077 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2078 */ 2079void wpa_sm_deinit(struct wpa_sm *sm) 2080{ 2081 if (sm == NULL) 2082 return; 2083 pmksa_cache_deinit(sm->pmksa); 2084 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2085 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2086 os_free(sm->assoc_wpa_ie); 2087 os_free(sm->ap_wpa_ie); 2088 os_free(sm->ap_rsn_ie); 2089 os_free(sm->ctx); 2090 peerkey_deinit(sm); 2091#ifdef CONFIG_IEEE80211R 2092 os_free(sm->assoc_resp_ies); 2093#endif /* CONFIG_IEEE80211R */ 2094 os_free(sm); 2095} 2096 2097 2098/** 2099 * wpa_sm_notify_assoc - Notify WPA state machine about association 2100 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2101 * @bssid: The BSSID of the new association 2102 * 2103 * This function is called to let WPA state machine know that the connection 2104 * was established. 2105 */ 2106void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2107{ 2108 int clear_ptk = 1; 2109 2110 if (sm == NULL) 2111 return; 2112 2113 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2114 "WPA: Association event - clear replay counter"); 2115 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2116 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2117 sm->rx_replay_counter_set = 0; 2118 sm->renew_snonce = 1; 2119 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2120 rsn_preauth_deinit(sm); 2121 2122#ifdef CONFIG_IEEE80211R 2123 if (wpa_ft_is_completed(sm)) { 2124 /* 2125 * Clear portValid to kick EAPOL state machine to re-enter 2126 * AUTHENTICATED state to get the EAPOL port Authorized. 2127 */ 2128 eapol_sm_notify_portValid(sm->eapol, FALSE); 2129 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2130 2131 /* Prepare for the next transition */ 2132 wpa_ft_prepare_auth_request(sm, NULL); 2133 2134 clear_ptk = 0; 2135 } 2136#endif /* CONFIG_IEEE80211R */ 2137 2138 if (clear_ptk) { 2139 /* 2140 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2141 * this is not part of a Fast BSS Transition. 2142 */ 2143 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2144 sm->ptk_set = 0; 2145 sm->tptk_set = 0; 2146 } 2147 2148#ifdef CONFIG_TDLS 2149 wpa_tdls_assoc(sm); 2150#endif /* CONFIG_TDLS */ 2151 2152#ifdef CONFIG_P2P 2153 os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); 2154#endif /* CONFIG_P2P */ 2155} 2156 2157 2158/** 2159 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2160 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2161 * 2162 * This function is called to let WPA state machine know that the connection 2163 * was lost. This will abort any existing pre-authentication session. 2164 */ 2165void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2166{ 2167 peerkey_deinit(sm); 2168 rsn_preauth_deinit(sm); 2169 pmksa_cache_clear_current(sm); 2170 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2171 sm->dot11RSNA4WayHandshakeFailures++; 2172#ifdef CONFIG_TDLS 2173 wpa_tdls_disassoc(sm); 2174#endif /* CONFIG_TDLS */ 2175} 2176 2177 2178/** 2179 * wpa_sm_set_pmk - Set PMK 2180 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2181 * @pmk: The new PMK 2182 * @pmk_len: The length of the new PMK in bytes 2183 * 2184 * Configure the PMK for WPA state machine. 2185 */ 2186void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) 2187{ 2188 if (sm == NULL) 2189 return; 2190 2191 sm->pmk_len = pmk_len; 2192 os_memcpy(sm->pmk, pmk, pmk_len); 2193 2194#ifdef CONFIG_IEEE80211R 2195 /* Set XXKey to be PSK for FT key derivation */ 2196 sm->xxkey_len = pmk_len; 2197 os_memcpy(sm->xxkey, pmk, pmk_len); 2198#endif /* CONFIG_IEEE80211R */ 2199} 2200 2201 2202/** 2203 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2204 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2205 * 2206 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2207 * will be cleared. 2208 */ 2209void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2210{ 2211 if (sm == NULL) 2212 return; 2213 2214 if (sm->cur_pmksa) { 2215 sm->pmk_len = sm->cur_pmksa->pmk_len; 2216 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2217 } else { 2218 sm->pmk_len = PMK_LEN; 2219 os_memset(sm->pmk, 0, PMK_LEN); 2220 } 2221} 2222 2223 2224/** 2225 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2226 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2227 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2228 */ 2229void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2230{ 2231 if (sm) 2232 sm->fast_reauth = fast_reauth; 2233} 2234 2235 2236/** 2237 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2238 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2239 * @scard_ctx: Context pointer for smartcard related callback functions 2240 */ 2241void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2242{ 2243 if (sm == NULL) 2244 return; 2245 sm->scard_ctx = scard_ctx; 2246 if (sm->preauth_eapol) 2247 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2248} 2249 2250 2251/** 2252 * wpa_sm_set_config - Notification of current configration change 2253 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2254 * @config: Pointer to current network configuration 2255 * 2256 * Notify WPA state machine that configuration has changed. config will be 2257 * stored as a backpointer to network configuration. This can be %NULL to clear 2258 * the stored pointed. 2259 */ 2260void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2261{ 2262 if (!sm) 2263 return; 2264 2265 if (config) { 2266 sm->network_ctx = config->network_ctx; 2267 sm->peerkey_enabled = config->peerkey_enabled; 2268 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2269 sm->proactive_key_caching = config->proactive_key_caching; 2270 sm->eap_workaround = config->eap_workaround; 2271 sm->eap_conf_ctx = config->eap_conf_ctx; 2272 if (config->ssid) { 2273 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2274 sm->ssid_len = config->ssid_len; 2275 } else 2276 sm->ssid_len = 0; 2277 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2278 sm->p2p = config->p2p; 2279 } else { 2280 sm->network_ctx = NULL; 2281 sm->peerkey_enabled = 0; 2282 sm->allowed_pairwise_cipher = 0; 2283 sm->proactive_key_caching = 0; 2284 sm->eap_workaround = 0; 2285 sm->eap_conf_ctx = NULL; 2286 sm->ssid_len = 0; 2287 sm->wpa_ptk_rekey = 0; 2288 sm->p2p = 0; 2289 } 2290} 2291 2292 2293/** 2294 * wpa_sm_set_own_addr - Set own MAC address 2295 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2296 * @addr: Own MAC address 2297 */ 2298void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2299{ 2300 if (sm) 2301 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2302} 2303 2304 2305/** 2306 * wpa_sm_set_ifname - Set network interface name 2307 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2308 * @ifname: Interface name 2309 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2310 */ 2311void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2312 const char *bridge_ifname) 2313{ 2314 if (sm) { 2315 sm->ifname = ifname; 2316 sm->bridge_ifname = bridge_ifname; 2317 } 2318} 2319 2320 2321/** 2322 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2323 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2324 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2325 */ 2326void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2327{ 2328 if (sm) 2329 sm->eapol = eapol; 2330} 2331 2332 2333/** 2334 * wpa_sm_set_param - Set WPA state machine parameters 2335 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2336 * @param: Parameter field 2337 * @value: Parameter value 2338 * Returns: 0 on success, -1 on failure 2339 */ 2340int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2341 unsigned int value) 2342{ 2343 int ret = 0; 2344 2345 if (sm == NULL) 2346 return -1; 2347 2348 switch (param) { 2349 case RSNA_PMK_LIFETIME: 2350 if (value > 0) 2351 sm->dot11RSNAConfigPMKLifetime = value; 2352 else 2353 ret = -1; 2354 break; 2355 case RSNA_PMK_REAUTH_THRESHOLD: 2356 if (value > 0 && value <= 100) 2357 sm->dot11RSNAConfigPMKReauthThreshold = value; 2358 else 2359 ret = -1; 2360 break; 2361 case RSNA_SA_TIMEOUT: 2362 if (value > 0) 2363 sm->dot11RSNAConfigSATimeout = value; 2364 else 2365 ret = -1; 2366 break; 2367 case WPA_PARAM_PROTO: 2368 sm->proto = value; 2369 break; 2370 case WPA_PARAM_PAIRWISE: 2371 sm->pairwise_cipher = value; 2372 break; 2373 case WPA_PARAM_GROUP: 2374 sm->group_cipher = value; 2375 break; 2376 case WPA_PARAM_KEY_MGMT: 2377 sm->key_mgmt = value; 2378 break; 2379#ifdef CONFIG_IEEE80211W 2380 case WPA_PARAM_MGMT_GROUP: 2381 sm->mgmt_group_cipher = value; 2382 break; 2383#endif /* CONFIG_IEEE80211W */ 2384 case WPA_PARAM_RSN_ENABLED: 2385 sm->rsn_enabled = value; 2386 break; 2387 case WPA_PARAM_MFP: 2388 sm->mfp = value; 2389 break; 2390 default: 2391 break; 2392 } 2393 2394 return ret; 2395} 2396 2397 2398/** 2399 * wpa_sm_get_param - Get WPA state machine parameters 2400 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2401 * @param: Parameter field 2402 * Returns: Parameter value 2403 */ 2404unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param) 2405{ 2406 if (sm == NULL) 2407 return 0; 2408 2409 switch (param) { 2410 case RSNA_PMK_LIFETIME: 2411 return sm->dot11RSNAConfigPMKLifetime; 2412 case RSNA_PMK_REAUTH_THRESHOLD: 2413 return sm->dot11RSNAConfigPMKReauthThreshold; 2414 case RSNA_SA_TIMEOUT: 2415 return sm->dot11RSNAConfigSATimeout; 2416 case WPA_PARAM_PROTO: 2417 return sm->proto; 2418 case WPA_PARAM_PAIRWISE: 2419 return sm->pairwise_cipher; 2420 case WPA_PARAM_GROUP: 2421 return sm->group_cipher; 2422 case WPA_PARAM_KEY_MGMT: 2423 return sm->key_mgmt; 2424#ifdef CONFIG_IEEE80211W 2425 case WPA_PARAM_MGMT_GROUP: 2426 return sm->mgmt_group_cipher; 2427#endif /* CONFIG_IEEE80211W */ 2428 case WPA_PARAM_RSN_ENABLED: 2429 return sm->rsn_enabled; 2430 default: 2431 return 0; 2432 } 2433} 2434 2435 2436/** 2437 * wpa_sm_get_status - Get WPA state machine 2438 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2439 * @buf: Buffer for status information 2440 * @buflen: Maximum buffer length 2441 * @verbose: Whether to include verbose status information 2442 * Returns: Number of bytes written to buf. 2443 * 2444 * Query WPA state machine for status information. This function fills in 2445 * a text area with current status information. If the buffer (buf) is not 2446 * large enough, status information will be truncated to fit the buffer. 2447 */ 2448int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 2449 int verbose) 2450{ 2451 char *pos = buf, *end = buf + buflen; 2452 int ret; 2453 2454 ret = os_snprintf(pos, end - pos, 2455 "pairwise_cipher=%s\n" 2456 "group_cipher=%s\n" 2457 "key_mgmt=%s\n", 2458 wpa_cipher_txt(sm->pairwise_cipher), 2459 wpa_cipher_txt(sm->group_cipher), 2460 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 2461 if (ret < 0 || ret >= end - pos) 2462 return pos - buf; 2463 pos += ret; 2464 2465 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { 2466 struct wpa_ie_data rsn; 2467 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) 2468 >= 0 && 2469 rsn.capabilities & (WPA_CAPABILITY_MFPR | 2470 WPA_CAPABILITY_MFPC)) { 2471 ret = os_snprintf(pos, end - pos, "pmf=%d\n", 2472 (rsn.capabilities & 2473 WPA_CAPABILITY_MFPR) ? 2 : 1); 2474 if (ret < 0 || ret >= end - pos) 2475 return pos - buf; 2476 pos += ret; 2477 } 2478 } 2479 2480 return pos - buf; 2481} 2482 2483 2484int wpa_sm_pmf_enabled(struct wpa_sm *sm) 2485{ 2486 struct wpa_ie_data rsn; 2487 2488 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) 2489 return 0; 2490 2491 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && 2492 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) 2493 return 1; 2494 2495 return 0; 2496} 2497 2498 2499/** 2500 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration 2501 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2502 * @wpa_ie: Pointer to buffer for WPA/RSN IE 2503 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer 2504 * Returns: 0 on success, -1 on failure 2505 */ 2506int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, 2507 size_t *wpa_ie_len) 2508{ 2509 int res; 2510 2511 if (sm == NULL) 2512 return -1; 2513 2514 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); 2515 if (res < 0) 2516 return -1; 2517 *wpa_ie_len = res; 2518 2519 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", 2520 wpa_ie, *wpa_ie_len); 2521 2522 if (sm->assoc_wpa_ie == NULL) { 2523 /* 2524 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets 2525 * the correct version of the IE even if PMKSA caching is 2526 * aborted (which would remove PMKID from IE generation). 2527 */ 2528 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); 2529 if (sm->assoc_wpa_ie == NULL) 2530 return -1; 2531 2532 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); 2533 sm->assoc_wpa_ie_len = *wpa_ie_len; 2534 } 2535 2536 return 0; 2537} 2538 2539 2540/** 2541 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq 2542 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2543 * @ie: Pointer to IE data (starting from id) 2544 * @len: IE length 2545 * Returns: 0 on success, -1 on failure 2546 * 2547 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association 2548 * Request frame. The IE will be used to override the default value generated 2549 * with wpa_sm_set_assoc_wpa_ie_default(). 2550 */ 2551int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2552{ 2553 if (sm == NULL) 2554 return -1; 2555 2556 os_free(sm->assoc_wpa_ie); 2557 if (ie == NULL || len == 0) { 2558 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2559 "WPA: clearing own WPA/RSN IE"); 2560 sm->assoc_wpa_ie = NULL; 2561 sm->assoc_wpa_ie_len = 0; 2562 } else { 2563 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); 2564 sm->assoc_wpa_ie = os_malloc(len); 2565 if (sm->assoc_wpa_ie == NULL) 2566 return -1; 2567 2568 os_memcpy(sm->assoc_wpa_ie, ie, len); 2569 sm->assoc_wpa_ie_len = len; 2570 } 2571 2572 return 0; 2573} 2574 2575 2576/** 2577 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp 2578 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2579 * @ie: Pointer to IE data (starting from id) 2580 * @len: IE length 2581 * Returns: 0 on success, -1 on failure 2582 * 2583 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response 2584 * frame. 2585 */ 2586int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2587{ 2588 if (sm == NULL) 2589 return -1; 2590 2591 os_free(sm->ap_wpa_ie); 2592 if (ie == NULL || len == 0) { 2593 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2594 "WPA: clearing AP WPA IE"); 2595 sm->ap_wpa_ie = NULL; 2596 sm->ap_wpa_ie_len = 0; 2597 } else { 2598 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); 2599 sm->ap_wpa_ie = os_malloc(len); 2600 if (sm->ap_wpa_ie == NULL) 2601 return -1; 2602 2603 os_memcpy(sm->ap_wpa_ie, ie, len); 2604 sm->ap_wpa_ie_len = len; 2605 } 2606 2607 return 0; 2608} 2609 2610 2611/** 2612 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp 2613 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2614 * @ie: Pointer to IE data (starting from id) 2615 * @len: IE length 2616 * Returns: 0 on success, -1 on failure 2617 * 2618 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response 2619 * frame. 2620 */ 2621int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2622{ 2623 if (sm == NULL) 2624 return -1; 2625 2626 os_free(sm->ap_rsn_ie); 2627 if (ie == NULL || len == 0) { 2628 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2629 "WPA: clearing AP RSN IE"); 2630 sm->ap_rsn_ie = NULL; 2631 sm->ap_rsn_ie_len = 0; 2632 } else { 2633 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); 2634 sm->ap_rsn_ie = os_malloc(len); 2635 if (sm->ap_rsn_ie == NULL) 2636 return -1; 2637 2638 os_memcpy(sm->ap_rsn_ie, ie, len); 2639 sm->ap_rsn_ie_len = len; 2640 } 2641 2642 return 0; 2643} 2644 2645 2646/** 2647 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE 2648 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2649 * @data: Pointer to data area for parsing results 2650 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure 2651 * 2652 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the 2653 * parsed data into data. 2654 */ 2655int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) 2656{ 2657 if (sm == NULL) 2658 return -1; 2659 2660 if (sm->assoc_wpa_ie == NULL) { 2661 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2662 "WPA: No WPA/RSN IE available from association info"); 2663 return -1; 2664 } 2665 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) 2666 return -2; 2667 return 0; 2668} 2669 2670 2671int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) 2672{ 2673 return pmksa_cache_list(sm->pmksa, buf, len); 2674} 2675 2676 2677void wpa_sm_drop_sa(struct wpa_sm *sm) 2678{ 2679 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 2680 sm->ptk_set = 0; 2681 sm->tptk_set = 0; 2682 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2683 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2684 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2685} 2686 2687 2688int wpa_sm_has_ptk(struct wpa_sm *sm) 2689{ 2690 if (sm == NULL) 2691 return 0; 2692 return sm->ptk_set; 2693} 2694 2695 2696void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 2697{ 2698 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 2699} 2700 2701 2702void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 2703{ 2704 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); 2705} 2706 2707 2708#ifdef CONFIG_WNM 2709int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 2710{ 2711 struct wpa_gtk_data gd; 2712#ifdef CONFIG_IEEE80211W 2713 struct wpa_igtk_kde igd; 2714 u16 keyidx; 2715#endif /* CONFIG_IEEE80211W */ 2716 u16 keyinfo; 2717 u8 keylen; /* plaintext key len */ 2718 u8 *key_rsc; 2719 2720 os_memset(&gd, 0, sizeof(gd)); 2721#ifdef CONFIG_IEEE80211W 2722 os_memset(&igd, 0, sizeof(igd)); 2723#endif /* CONFIG_IEEE80211W */ 2724 2725 keylen = wpa_cipher_key_len(sm->group_cipher); 2726 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); 2727 gd.alg = wpa_cipher_to_alg(sm->group_cipher); 2728 if (gd.alg == WPA_ALG_NONE) { 2729 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 2730 return -1; 2731 } 2732 2733 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 2734 key_rsc = buf + 5; 2735 keyinfo = WPA_GET_LE16(buf + 2); 2736 gd.gtk_len = keylen; 2737 if (gd.gtk_len != buf[4]) { 2738 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 2739 gd.gtk_len, buf[4]); 2740 return -1; 2741 } 2742 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 2743 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 2744 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 2745 2746 os_memcpy(gd.gtk, buf + 13, gd.gtk_len); 2747 2748 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 2749 gd.gtk, gd.gtk_len); 2750 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { 2751 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 2752 "WNM mode"); 2753 return -1; 2754 } 2755#ifdef CONFIG_IEEE80211W 2756 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 2757 keylen = wpa_cipher_key_len(sm->mgmt_group_cipher); 2758 os_memcpy(igd.keyid, buf + 2, 2); 2759 os_memcpy(igd.pn, buf + 4, 6); 2760 2761 keyidx = WPA_GET_LE16(igd.keyid); 2762 os_memcpy(igd.igtk, buf + 10, keylen); 2763 2764 wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", 2765 igd.igtk, keylen); 2766 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), 2767 broadcast_ether_addr, 2768 keyidx, 0, igd.pn, sizeof(igd.pn), 2769 igd.igtk, keylen) < 0) { 2770 wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " 2771 "WNM mode"); 2772 return -1; 2773 } 2774#endif /* CONFIG_IEEE80211W */ 2775 } else { 2776 wpa_printf(MSG_DEBUG, "Unknown element id"); 2777 return -1; 2778 } 2779 2780 return 0; 2781} 2782#endif /* CONFIG_WNM */ 2783 2784 2785#ifdef CONFIG_PEERKEY 2786int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr, 2787 const u8 *buf, size_t len) 2788{ 2789 struct wpa_peerkey *peerkey; 2790 2791 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 2792 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 2793 break; 2794 } 2795 2796 if (!peerkey) 2797 return 0; 2798 2799 wpa_sm_rx_eapol(sm, src_addr, buf, len); 2800 2801 return 1; 2802} 2803#endif /* CONFIG_PEERKEY */ 2804 2805 2806#ifdef CONFIG_P2P 2807 2808int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) 2809{ 2810 if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) 2811 return -1; 2812 os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); 2813 return 0; 2814} 2815 2816#endif /* CONFIG_P2P */ 2817