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 (wpa_key_mgmt_ft(sm->key_mgmt) || wpa_key_mgmt_sha256(sm->key_mgmt)) 93 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; 94 else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) 95 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; 96 else 97 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; 98 99 if (wpa_sm_get_bssid(sm, bssid) < 0) { 100 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 101 "Failed to read BSSID for EAPOL-Key request"); 102 return; 103 } 104 105 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 106 sizeof(*reply), &rlen, (void *) &reply); 107 if (rbuf == NULL) 108 return; 109 110 reply->type = sm->proto == WPA_PROTO_RSN ? 111 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 112 key_info = WPA_KEY_INFO_REQUEST | ver; 113 if (sm->ptk_set) 114 key_info |= WPA_KEY_INFO_MIC; 115 if (error) 116 key_info |= WPA_KEY_INFO_ERROR; 117 if (pairwise) 118 key_info |= WPA_KEY_INFO_KEY_TYPE; 119 WPA_PUT_BE16(reply->key_info, key_info); 120 WPA_PUT_BE16(reply->key_length, 0); 121 os_memcpy(reply->replay_counter, sm->request_counter, 122 WPA_REPLAY_COUNTER_LEN); 123 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); 124 125 WPA_PUT_BE16(reply->key_data_length, 0); 126 127 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 128 "WPA: Sending EAPOL-Key Request (error=%d " 129 "pairwise=%d ptk_set=%d len=%lu)", 130 error, pairwise, sm->ptk_set, (unsigned long) rlen); 131 wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL, 132 rbuf, rlen, key_info & WPA_KEY_INFO_MIC ? 133 reply->key_mic : NULL); 134} 135 136 137static int wpa_supplicant_get_pmk(struct wpa_sm *sm, 138 const unsigned char *src_addr, 139 const u8 *pmkid) 140{ 141 int abort_cached = 0; 142 143 if (pmkid && !sm->cur_pmksa) { 144 /* When using drivers that generate RSN IE, wpa_supplicant may 145 * not have enough time to get the association information 146 * event before receiving this 1/4 message, so try to find a 147 * matching PMKSA cache entry here. */ 148 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, 149 NULL); 150 if (sm->cur_pmksa) { 151 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 152 "RSN: found matching PMKID from PMKSA cache"); 153 } else { 154 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 155 "RSN: no matching PMKID found"); 156 abort_cached = 1; 157 } 158 } 159 160 if (pmkid && sm->cur_pmksa && 161 os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { 162 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); 163 wpa_sm_set_pmk_from_pmksa(sm); 164 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", 165 sm->pmk, sm->pmk_len); 166 eapol_sm_notify_cached(sm->eapol); 167#ifdef CONFIG_IEEE80211R 168 sm->xxkey_len = 0; 169#endif /* CONFIG_IEEE80211R */ 170 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { 171 int res, pmk_len; 172 pmk_len = PMK_LEN; 173 res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN); 174 if (res) { 175 /* 176 * EAP-LEAP is an exception from other EAP methods: it 177 * uses only 16-byte PMK. 178 */ 179 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); 180 pmk_len = 16; 181 } else { 182#ifdef CONFIG_IEEE80211R 183 u8 buf[2 * PMK_LEN]; 184 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) 185 { 186 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); 187 sm->xxkey_len = PMK_LEN; 188 os_memset(buf, 0, sizeof(buf)); 189 } 190#endif /* CONFIG_IEEE80211R */ 191 } 192 if (res == 0) { 193 struct rsn_pmksa_cache_entry *sa = NULL; 194 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " 195 "machines", sm->pmk, pmk_len); 196 sm->pmk_len = pmk_len; 197 if (sm->proto == WPA_PROTO_RSN && 198 !wpa_key_mgmt_ft(sm->key_mgmt)) { 199 sa = pmksa_cache_add(sm->pmksa, 200 sm->pmk, pmk_len, 201 src_addr, sm->own_addr, 202 sm->network_ctx, 203 sm->key_mgmt); 204 } 205 if (!sm->cur_pmksa && pmkid && 206 pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) 207 { 208 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 209 "RSN: the new PMK matches with the " 210 "PMKID"); 211 abort_cached = 0; 212 } 213 214 if (!sm->cur_pmksa) 215 sm->cur_pmksa = sa; 216 } else { 217 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 218 "WPA: Failed to get master session key from " 219 "EAPOL state machines - key handshake " 220 "aborted"); 221 if (sm->cur_pmksa) { 222 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 223 "RSN: Cancelled PMKSA caching " 224 "attempt"); 225 sm->cur_pmksa = NULL; 226 abort_cached = 1; 227 } else if (!abort_cached) { 228 return -1; 229 } 230 } 231 } 232 233 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && 234 !wpa_key_mgmt_ft(sm->key_mgmt)) { 235 /* Send EAPOL-Start to trigger full EAP authentication. */ 236 u8 *buf; 237 size_t buflen; 238 239 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 240 "RSN: no PMKSA entry found - trigger " 241 "full EAP authentication"); 242 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, 243 NULL, 0, &buflen, NULL); 244 if (buf) { 245 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, 246 buf, buflen); 247 os_free(buf); 248 return -2; 249 } 250 251 return -1; 252 } 253 254 return 0; 255} 256 257 258/** 259 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake 260 * @sm: Pointer to WPA state machine data from wpa_sm_init() 261 * @dst: Destination address for the frame 262 * @key: Pointer to the EAPOL-Key frame header 263 * @ver: Version bits from EAPOL-Key Key Info 264 * @nonce: Nonce value for the EAPOL-Key frame 265 * @wpa_ie: WPA/RSN IE 266 * @wpa_ie_len: Length of the WPA/RSN IE 267 * @ptk: PTK to use for keyed hash and encryption 268 * Returns: 0 on success, -1 on failure 269 */ 270int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, 271 const struct wpa_eapol_key *key, 272 int ver, const u8 *nonce, 273 const u8 *wpa_ie, size_t wpa_ie_len, 274 struct wpa_ptk *ptk) 275{ 276 size_t rlen; 277 struct wpa_eapol_key *reply; 278 u8 *rbuf; 279 u8 *rsn_ie_buf = NULL; 280 281 if (wpa_ie == NULL) { 282 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " 283 "cannot generate msg 2/4"); 284 return -1; 285 } 286 287#ifdef CONFIG_IEEE80211R 288 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 289 int res; 290 291 /* 292 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and 293 * FTIE from (Re)Association Response. 294 */ 295 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + 296 sm->assoc_resp_ies_len); 297 if (rsn_ie_buf == NULL) 298 return -1; 299 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); 300 res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len, 301 sm->pmk_r1_name); 302 if (res < 0) { 303 os_free(rsn_ie_buf); 304 return -1; 305 } 306 wpa_ie_len += res; 307 308 if (sm->assoc_resp_ies) { 309 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, 310 sm->assoc_resp_ies_len); 311 wpa_ie_len += sm->assoc_resp_ies_len; 312 } 313 314 wpa_ie = rsn_ie_buf; 315 } 316#endif /* CONFIG_IEEE80211R */ 317 318 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); 319 320 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, 321 NULL, sizeof(*reply) + wpa_ie_len, 322 &rlen, (void *) &reply); 323 if (rbuf == NULL) { 324 os_free(rsn_ie_buf); 325 return -1; 326 } 327 328 reply->type = sm->proto == WPA_PROTO_RSN ? 329 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 330 WPA_PUT_BE16(reply->key_info, 331 ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC); 332 if (sm->proto == WPA_PROTO_RSN) 333 WPA_PUT_BE16(reply->key_length, 0); 334 else 335 os_memcpy(reply->key_length, key->key_length, 2); 336 os_memcpy(reply->replay_counter, key->replay_counter, 337 WPA_REPLAY_COUNTER_LEN); 338 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, 339 WPA_REPLAY_COUNTER_LEN); 340 341 WPA_PUT_BE16(reply->key_data_length, wpa_ie_len); 342 os_memcpy(reply + 1, wpa_ie, wpa_ie_len); 343 os_free(rsn_ie_buf); 344 345 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); 346 347 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); 348 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, 349 rbuf, rlen, reply->key_mic); 350 351 return 0; 352} 353 354 355static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, 356 const struct wpa_eapol_key *key, 357 struct wpa_ptk *ptk) 358{ 359 size_t ptk_len = sm->pairwise_cipher != WPA_CIPHER_TKIP ? 48 : 64; 360#ifdef CONFIG_IEEE80211R 361 if (wpa_key_mgmt_ft(sm->key_mgmt)) 362 return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len); 363#endif /* CONFIG_IEEE80211R */ 364 365 wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", 366 sm->own_addr, sm->bssid, sm->snonce, key->key_nonce, 367 (u8 *) ptk, ptk_len, 368 wpa_key_mgmt_sha256(sm->key_mgmt)); 369 return 0; 370} 371 372 373static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, 374 const unsigned char *src_addr, 375 const struct wpa_eapol_key *key, 376 u16 ver) 377{ 378 struct wpa_eapol_ie_parse ie; 379 struct wpa_ptk *ptk; 380 u8 buf[8]; 381 int res; 382 383 if (wpa_sm_get_network_ctx(sm) == NULL) { 384 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " 385 "found (msg 1 of 4)"); 386 return; 387 } 388 389 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 390 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " 391 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 392 393 os_memset(&ie, 0, sizeof(ie)); 394 395#ifndef CONFIG_NO_WPA2 396 if (sm->proto == WPA_PROTO_RSN) { 397 /* RSN: msg 1/4 should contain PMKID for the selected PMK */ 398 const u8 *_buf = (const u8 *) (key + 1); 399 size_t len = WPA_GET_BE16(key->key_data_length); 400 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len); 401 if (wpa_supplicant_parse_ies(_buf, len, &ie) < 0) 402 goto failed; 403 if (ie.pmkid) { 404 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " 405 "Authenticator", ie.pmkid, PMKID_LEN); 406 } 407 } 408#endif /* CONFIG_NO_WPA2 */ 409 410 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); 411 if (res == -2) { 412 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " 413 "msg 1/4 - requesting full EAP authentication"); 414 return; 415 } 416 if (res) 417 goto failed; 418 419 if (sm->renew_snonce) { 420 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { 421 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 422 "WPA: Failed to get random data for SNonce"); 423 goto failed; 424 } 425 sm->renew_snonce = 0; 426 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", 427 sm->snonce, WPA_NONCE_LEN); 428 } 429 430 /* Calculate PTK which will be stored as a temporary PTK until it has 431 * been verified when processing message 3/4. */ 432 ptk = &sm->tptk; 433 wpa_derive_ptk(sm, src_addr, key, ptk); 434 /* Supplicant: swap tx/rx Mic keys */ 435 os_memcpy(buf, ptk->u.auth.tx_mic_key, 8); 436 os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8); 437 os_memcpy(ptk->u.auth.rx_mic_key, buf, 8); 438 sm->tptk_set = 1; 439 440 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, 441 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, 442 ptk)) 443 goto failed; 444 445 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); 446 return; 447 448failed: 449 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 450} 451 452 453static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) 454{ 455 struct wpa_sm *sm = eloop_ctx; 456 rsn_preauth_candidate_process(sm); 457} 458 459 460static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, 461 const u8 *addr, int secure) 462{ 463 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 464 "WPA: Key negotiation completed with " 465 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), 466 wpa_cipher_txt(sm->pairwise_cipher), 467 wpa_cipher_txt(sm->group_cipher)); 468 wpa_sm_cancel_auth_timeout(sm); 469 wpa_sm_set_state(sm, WPA_COMPLETED); 470 471 if (secure) { 472 wpa_sm_mlme_setprotection( 473 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, 474 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 475 eapol_sm_notify_portValid(sm->eapol, TRUE); 476 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) 477 eapol_sm_notify_eap_success(sm->eapol, TRUE); 478 /* 479 * Start preauthentication after a short wait to avoid a 480 * possible race condition between the data receive and key 481 * configuration after the 4-Way Handshake. This increases the 482 * likelihood of the first preauth EAPOL-Start frame getting to 483 * the target AP. 484 */ 485 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); 486 } 487 488 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { 489 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 490 "RSN: Authenticator accepted " 491 "opportunistic PMKSA entry - marking it valid"); 492 sm->cur_pmksa->opportunistic = 0; 493 } 494 495#ifdef CONFIG_IEEE80211R 496 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 497 /* Prepare for the next transition */ 498 wpa_ft_prepare_auth_request(sm, NULL); 499 } 500#endif /* CONFIG_IEEE80211R */ 501} 502 503 504static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) 505{ 506 struct wpa_sm *sm = eloop_ctx; 507 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); 508 wpa_sm_key_request(sm, 0, 1); 509} 510 511 512static int wpa_supplicant_install_ptk(struct wpa_sm *sm, 513 const struct wpa_eapol_key *key) 514{ 515 int keylen, rsclen; 516 enum wpa_alg alg; 517 const u8 *key_rsc; 518 u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 519 520 if (sm->ptk_installed) { 521 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 522 "WPA: Do not re-install same PTK to the driver"); 523 return 0; 524 } 525 526 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 527 "WPA: Installing PTK to the driver"); 528 529 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 530 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " 531 "Suite: NONE - do not use pairwise keys"); 532 return 0; 533 } 534 535 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { 536 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 537 "WPA: Unsupported pairwise cipher %d", 538 sm->pairwise_cipher); 539 return -1; 540 } 541 542 alg = wpa_cipher_to_alg(sm->pairwise_cipher); 543 keylen = wpa_cipher_key_len(sm->pairwise_cipher); 544 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); 545 546 if (sm->proto == WPA_PROTO_RSN) { 547 key_rsc = null_rsc; 548 } else { 549 key_rsc = key->key_rsc; 550 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); 551 } 552 553 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, 554 (u8 *) sm->ptk.tk1, keylen) < 0) { 555 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 556 "WPA: Failed to set PTK to the " 557 "driver (alg=%d keylen=%d bssid=" MACSTR ")", 558 alg, keylen, MAC2STR(sm->bssid)); 559 return -1; 560 } 561 562 sm->ptk_installed = 1; 563 564 if (sm->wpa_ptk_rekey) { 565 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 566 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, 567 sm, NULL); 568 } 569 570 return 0; 571} 572 573 574static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, 575 int group_cipher, 576 int keylen, int maxkeylen, 577 int *key_rsc_len, 578 enum wpa_alg *alg) 579{ 580 int klen; 581 582 *alg = wpa_cipher_to_alg(group_cipher); 583 if (*alg == WPA_ALG_NONE) { 584 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 585 "WPA: Unsupported Group Cipher %d", 586 group_cipher); 587 return -1; 588 } 589 *key_rsc_len = wpa_cipher_rsc_len(group_cipher); 590 591 klen = wpa_cipher_key_len(group_cipher); 592 if (keylen != klen || maxkeylen < klen) { 593 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 594 "WPA: Unsupported %s Group Cipher key length %d (%d)", 595 wpa_cipher_txt(group_cipher), keylen, maxkeylen); 596 return -1; 597 } 598 return 0; 599} 600 601 602struct wpa_gtk_data { 603 enum wpa_alg alg; 604 int tx, key_rsc_len, keyidx; 605 u8 gtk[32]; 606 int gtk_len; 607}; 608 609 610static int wpa_supplicant_install_gtk(struct wpa_sm *sm, 611 const struct wpa_gtk_data *gd, 612 const u8 *key_rsc, int wnm_sleep) 613{ 614 const u8 *_gtk = gd->gtk; 615 u8 gtk_buf[32]; 616 617 /* Detect possible key reinstallation */ 618 if ((sm->gtk.gtk_len == (size_t) gd->gtk_len && 619 os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) || 620 (sm->gtk_wnm_sleep.gtk_len == (size_t) gd->gtk_len && 621 os_memcmp(sm->gtk_wnm_sleep.gtk, gd->gtk, 622 sm->gtk_wnm_sleep.gtk_len) == 0)) { 623 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 624 "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)", 625 gd->keyidx, gd->tx, gd->gtk_len); 626 return 0; 627 } 628 629 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); 630 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 631 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", 632 gd->keyidx, gd->tx, gd->gtk_len); 633 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); 634 if (sm->group_cipher == WPA_CIPHER_TKIP) { 635 /* Swap Tx/Rx keys for Michael MIC */ 636 os_memcpy(gtk_buf, gd->gtk, 16); 637 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); 638 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); 639 _gtk = gtk_buf; 640 } 641 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 642 if (wpa_sm_set_key(sm, gd->alg, NULL, 643 gd->keyidx, 1, key_rsc, gd->key_rsc_len, 644 _gtk, gd->gtk_len) < 0) { 645 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 646 "WPA: Failed to set GTK to the driver " 647 "(Group only)"); 648 return -1; 649 } 650 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, 651 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, 652 _gtk, gd->gtk_len) < 0) { 653 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 654 "WPA: Failed to set GTK to " 655 "the driver (alg=%d keylen=%d keyidx=%d)", 656 gd->alg, gd->gtk_len, gd->keyidx); 657 return -1; 658 } 659 660 if (wnm_sleep) { 661 sm->gtk_wnm_sleep.gtk_len = gd->gtk_len; 662 os_memcpy(sm->gtk_wnm_sleep.gtk, gd->gtk, 663 sm->gtk_wnm_sleep.gtk_len); 664 } else { 665 sm->gtk.gtk_len = gd->gtk_len; 666 os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len); 667 } 668 669 return 0; 670} 671 672 673static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, 674 int tx) 675{ 676 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { 677 /* Ignore Tx bit for GTK if a pairwise key is used. One AP 678 * seemed to set this bit (incorrectly, since Tx is only when 679 * doing Group Key only APs) and without this workaround, the 680 * data connection does not work because wpa_supplicant 681 * configured non-zero keyidx to be used for unicast. */ 682 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 683 "WPA: Tx bit set for GTK, but pairwise " 684 "keys are used - ignore Tx bit"); 685 return 0; 686 } 687 return tx; 688} 689 690 691static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, 692 const struct wpa_eapol_key *key, 693 const u8 *gtk, size_t gtk_len, 694 int key_info) 695{ 696#ifndef CONFIG_NO_WPA2 697 struct wpa_gtk_data gd; 698 699 /* 700 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x 701 * GTK KDE format: 702 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] 703 * Reserved [bits 0-7] 704 * GTK 705 */ 706 707 os_memset(&gd, 0, sizeof(gd)); 708 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", 709 gtk, gtk_len); 710 711 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) 712 return -1; 713 714 gd.keyidx = gtk[0] & 0x3; 715 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 716 !!(gtk[0] & BIT(2))); 717 gtk += 2; 718 gtk_len -= 2; 719 720 os_memcpy(gd.gtk, gtk, gtk_len); 721 gd.gtk_len = gtk_len; 722 723 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 724 gtk_len, gtk_len, 725 &gd.key_rsc_len, &gd.alg) || 726 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc, 0)) { 727 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 728 "RSN: Failed to install GTK"); 729 return -1; 730 } 731 732 wpa_supplicant_key_neg_complete(sm, sm->bssid, 733 key_info & WPA_KEY_INFO_SECURE); 734 return 0; 735#else /* CONFIG_NO_WPA2 */ 736 return -1; 737#endif /* CONFIG_NO_WPA2 */ 738} 739 740 741#ifdef CONFIG_IEEE80211W 742static int wpa_supplicant_install_igtk(struct wpa_sm *sm, 743 const struct wpa_igtk_kde *igtk, 744 int wnm_sleep) 745{ 746 size_t len = WPA_IGTK_LEN; 747 u16 keyidx = WPA_GET_LE16(igtk->keyid); 748 749 /* Detect possible key reinstallation */ 750 if ((sm->igtk.igtk_len == len && 751 os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) || 752 (sm->igtk_wnm_sleep.igtk_len == len && 753 os_memcmp(sm->igtk_wnm_sleep.igtk, igtk->igtk, 754 sm->igtk_wnm_sleep.igtk_len) == 0)) { 755 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 756 "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)", 757 keyidx); 758 return 0; 759 } 760 761 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 762 "WPA: IGTK keyid %d pn %02x%02x%02x%02x%02x%02x", 763 keyidx, MAC2STR(igtk->pn)); 764 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len); 765 if (keyidx > 4095) { 766 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 767 "WPA: Invalid IGTK KeyID %d", keyidx); 768 return -1; 769 } 770 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, 771 keyidx, 0, igtk->pn, sizeof(igtk->pn), 772 igtk->igtk, WPA_IGTK_LEN) < 0) { 773 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 774 "WPA: Failed to configure IGTK to the driver"); 775 return -1; 776 } 777 778 if (wnm_sleep) { 779 sm->igtk_wnm_sleep.igtk_len = len; 780 os_memcpy(sm->igtk_wnm_sleep.igtk, igtk->igtk, 781 sm->igtk_wnm_sleep.igtk_len); 782 } else { 783 sm->igtk.igtk_len = len; 784 os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len); 785 } 786 787 return 0; 788} 789#endif /* CONFIG_IEEE80211W */ 790 791 792static int ieee80211w_set_keys(struct wpa_sm *sm, 793 struct wpa_eapol_ie_parse *ie) 794{ 795#ifdef CONFIG_IEEE80211W 796 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) 797 return 0; 798 799 if (ie->igtk) { 800 const struct wpa_igtk_kde *igtk; 801 if (ie->igtk_len != sizeof(*igtk)) 802 return -1; 803 804 igtk = (const struct wpa_igtk_kde *) ie->igtk; 805 if (wpa_supplicant_install_igtk(sm, igtk, 0) < 0) 806 return -1; 807 } 808 809 return 0; 810#else /* CONFIG_IEEE80211W */ 811 return 0; 812#endif /* CONFIG_IEEE80211W */ 813} 814 815 816static void wpa_report_ie_mismatch(struct wpa_sm *sm, 817 const char *reason, const u8 *src_addr, 818 const u8 *wpa_ie, size_t wpa_ie_len, 819 const u8 *rsn_ie, size_t rsn_ie_len) 820{ 821 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", 822 reason, MAC2STR(src_addr)); 823 824 if (sm->ap_wpa_ie) { 825 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", 826 sm->ap_wpa_ie, sm->ap_wpa_ie_len); 827 } 828 if (wpa_ie) { 829 if (!sm->ap_wpa_ie) { 830 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 831 "WPA: No WPA IE in Beacon/ProbeResp"); 832 } 833 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", 834 wpa_ie, wpa_ie_len); 835 } 836 837 if (sm->ap_rsn_ie) { 838 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", 839 sm->ap_rsn_ie, sm->ap_rsn_ie_len); 840 } 841 if (rsn_ie) { 842 if (!sm->ap_rsn_ie) { 843 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 844 "WPA: No RSN IE in Beacon/ProbeResp"); 845 } 846 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", 847 rsn_ie, rsn_ie_len); 848 } 849 850 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); 851} 852 853 854#ifdef CONFIG_IEEE80211R 855 856static int ft_validate_mdie(struct wpa_sm *sm, 857 const unsigned char *src_addr, 858 struct wpa_eapol_ie_parse *ie, 859 const u8 *assoc_resp_mdie) 860{ 861 struct rsn_mdie *mdie; 862 863 mdie = (struct rsn_mdie *) (ie->mdie + 2); 864 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || 865 os_memcmp(mdie->mobility_domain, sm->mobility_domain, 866 MOBILITY_DOMAIN_ID_LEN) != 0) { 867 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " 868 "not match with the current mobility domain"); 869 return -1; 870 } 871 872 if (assoc_resp_mdie && 873 (assoc_resp_mdie[1] != ie->mdie[1] || 874 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { 875 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); 876 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", 877 ie->mdie, 2 + ie->mdie[1]); 878 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", 879 assoc_resp_mdie, 2 + assoc_resp_mdie[1]); 880 return -1; 881 } 882 883 return 0; 884} 885 886 887static int ft_validate_ftie(struct wpa_sm *sm, 888 const unsigned char *src_addr, 889 struct wpa_eapol_ie_parse *ie, 890 const u8 *assoc_resp_ftie) 891{ 892 if (ie->ftie == NULL) { 893 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 894 "FT: No FTIE in EAPOL-Key msg 3/4"); 895 return -1; 896 } 897 898 if (assoc_resp_ftie == NULL) 899 return 0; 900 901 if (assoc_resp_ftie[1] != ie->ftie[1] || 902 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { 903 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); 904 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", 905 ie->ftie, 2 + ie->ftie[1]); 906 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", 907 assoc_resp_ftie, 2 + assoc_resp_ftie[1]); 908 return -1; 909 } 910 911 return 0; 912} 913 914 915static int ft_validate_rsnie(struct wpa_sm *sm, 916 const unsigned char *src_addr, 917 struct wpa_eapol_ie_parse *ie) 918{ 919 struct wpa_ie_data rsn; 920 921 if (!ie->rsn_ie) 922 return 0; 923 924 /* 925 * Verify that PMKR1Name from EAPOL-Key message 3/4 926 * matches with the value we derived. 927 */ 928 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || 929 rsn.num_pmkid != 1 || rsn.pmkid == NULL) { 930 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " 931 "FT 4-way handshake message 3/4"); 932 return -1; 933 } 934 935 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { 936 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 937 "FT: PMKR1Name mismatch in " 938 "FT 4-way handshake message 3/4"); 939 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", 940 rsn.pmkid, WPA_PMK_NAME_LEN); 941 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", 942 sm->pmk_r1_name, WPA_PMK_NAME_LEN); 943 return -1; 944 } 945 946 return 0; 947} 948 949 950static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, 951 const unsigned char *src_addr, 952 struct wpa_eapol_ie_parse *ie) 953{ 954 const u8 *pos, *end, *mdie = NULL, *ftie = NULL; 955 956 if (sm->assoc_resp_ies) { 957 pos = sm->assoc_resp_ies; 958 end = pos + sm->assoc_resp_ies_len; 959 while (pos + 2 < end) { 960 if (pos + 2 + pos[1] > end) 961 break; 962 switch (*pos) { 963 case WLAN_EID_MOBILITY_DOMAIN: 964 mdie = pos; 965 break; 966 case WLAN_EID_FAST_BSS_TRANSITION: 967 ftie = pos; 968 break; 969 } 970 pos += 2 + pos[1]; 971 } 972 } 973 974 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || 975 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || 976 ft_validate_rsnie(sm, src_addr, ie) < 0) 977 return -1; 978 979 return 0; 980} 981 982#endif /* CONFIG_IEEE80211R */ 983 984 985static int wpa_supplicant_validate_ie(struct wpa_sm *sm, 986 const unsigned char *src_addr, 987 struct wpa_eapol_ie_parse *ie) 988{ 989 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { 990 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 991 "WPA: No WPA/RSN IE for this AP known. " 992 "Trying to get from scan results"); 993 if (wpa_sm_get_beacon_ie(sm) < 0) { 994 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 995 "WPA: Could not find AP from " 996 "the scan results"); 997 } else { 998 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, 999 "WPA: Found the current AP from " 1000 "updated scan results"); 1001 } 1002 } 1003 1004 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && 1005 (sm->ap_wpa_ie || sm->ap_rsn_ie)) { 1006 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 1007 "with IE in Beacon/ProbeResp (no IE?)", 1008 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1009 ie->rsn_ie, ie->rsn_ie_len); 1010 return -1; 1011 } 1012 1013 if ((ie->wpa_ie && sm->ap_wpa_ie && 1014 (ie->wpa_ie_len != sm->ap_wpa_ie_len || 1015 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || 1016 (ie->rsn_ie && sm->ap_rsn_ie && 1017 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), 1018 sm->ap_rsn_ie, sm->ap_rsn_ie_len, 1019 ie->rsn_ie, ie->rsn_ie_len))) { 1020 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 1021 "with IE in Beacon/ProbeResp", 1022 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1023 ie->rsn_ie, ie->rsn_ie_len); 1024 return -1; 1025 } 1026 1027 if (sm->proto == WPA_PROTO_WPA && 1028 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { 1029 wpa_report_ie_mismatch(sm, "Possible downgrade attack " 1030 "detected - RSN was enabled and RSN IE " 1031 "was in msg 3/4, but not in " 1032 "Beacon/ProbeResp", 1033 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1034 ie->rsn_ie, ie->rsn_ie_len); 1035 return -1; 1036 } 1037 1038#ifdef CONFIG_IEEE80211R 1039 if (wpa_key_mgmt_ft(sm->key_mgmt) && 1040 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) 1041 return -1; 1042#endif /* CONFIG_IEEE80211R */ 1043 1044 return 0; 1045} 1046 1047 1048/** 1049 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake 1050 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1051 * @dst: Destination address for the frame 1052 * @key: Pointer to the EAPOL-Key frame header 1053 * @ver: Version bits from EAPOL-Key Key Info 1054 * @key_info: Key Info 1055 * @kde: KDEs to include the EAPOL-Key frame 1056 * @kde_len: Length of KDEs 1057 * @ptk: PTK to use for keyed hash and encryption 1058 * Returns: 0 on success, -1 on failure 1059 */ 1060int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 1061 const struct wpa_eapol_key *key, 1062 u16 ver, u16 key_info, 1063 const u8 *kde, size_t kde_len, 1064 struct wpa_ptk *ptk) 1065{ 1066 size_t rlen; 1067 struct wpa_eapol_key *reply; 1068 u8 *rbuf; 1069 1070 if (kde) 1071 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len); 1072 1073 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1074 sizeof(*reply) + kde_len, 1075 &rlen, (void *) &reply); 1076 if (rbuf == NULL) 1077 return -1; 1078 1079 reply->type = sm->proto == WPA_PROTO_RSN ? 1080 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1081 key_info &= WPA_KEY_INFO_SECURE; 1082 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; 1083 WPA_PUT_BE16(reply->key_info, key_info); 1084 if (sm->proto == WPA_PROTO_RSN) 1085 WPA_PUT_BE16(reply->key_length, 0); 1086 else 1087 os_memcpy(reply->key_length, key->key_length, 2); 1088 os_memcpy(reply->replay_counter, key->replay_counter, 1089 WPA_REPLAY_COUNTER_LEN); 1090 1091 WPA_PUT_BE16(reply->key_data_length, kde_len); 1092 if (kde) 1093 os_memcpy(reply + 1, kde, kde_len); 1094 1095 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); 1096 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, 1097 rbuf, rlen, reply->key_mic); 1098 1099 return 0; 1100} 1101 1102 1103static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, 1104 const struct wpa_eapol_key *key, 1105 u16 ver) 1106{ 1107 u16 key_info, keylen, len; 1108 const u8 *pos; 1109 struct wpa_eapol_ie_parse ie; 1110 1111 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 1112 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " 1113 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); 1114 1115 key_info = WPA_GET_BE16(key->key_info); 1116 1117 pos = (const u8 *) (key + 1); 1118 len = WPA_GET_BE16(key->key_data_length); 1119 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len); 1120 if (wpa_supplicant_parse_ies(pos, len, &ie) < 0) 1121 goto failed; 1122 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1123 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1124 "WPA: GTK IE in unencrypted key data"); 1125 goto failed; 1126 } 1127#ifdef CONFIG_IEEE80211W 1128 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1129 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1130 "WPA: IGTK KDE in unencrypted key data"); 1131 goto failed; 1132 } 1133 1134 if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) { 1135 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1136 "WPA: Invalid IGTK KDE length %lu", 1137 (unsigned long) ie.igtk_len); 1138 goto failed; 1139 } 1140#endif /* CONFIG_IEEE80211W */ 1141 1142 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1143 goto failed; 1144 1145 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1146 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1147 "WPA: ANonce from message 1 of 4-Way Handshake " 1148 "differs from 3 of 4-Way Handshake - drop packet (src=" 1149 MACSTR ")", MAC2STR(sm->bssid)); 1150 goto failed; 1151 } 1152 1153 keylen = WPA_GET_BE16(key->key_length); 1154 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { 1155 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1156 "WPA: Invalid %s key length %d (src=" MACSTR 1157 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, 1158 MAC2STR(sm->bssid)); 1159 goto failed; 1160 } 1161 1162 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1163 NULL, 0, &sm->ptk)) { 1164 goto failed; 1165 } 1166 1167 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1168 * for the next 4-Way Handshake. If msg 3 is received again, the old 1169 * SNonce will still be used to avoid changing PTK. */ 1170 sm->renew_snonce = 1; 1171 1172 if (key_info & WPA_KEY_INFO_INSTALL) { 1173 if (wpa_supplicant_install_ptk(sm, key)) 1174 goto failed; 1175 } 1176 1177 if (key_info & WPA_KEY_INFO_SECURE) { 1178 wpa_sm_mlme_setprotection( 1179 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1180 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1181 eapol_sm_notify_portValid(sm->eapol, TRUE); 1182 } 1183 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1184 1185 if (ie.gtk && 1186 wpa_supplicant_pairwise_gtk(sm, key, 1187 ie.gtk, ie.gtk_len, key_info) < 0) { 1188 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1189 "RSN: Failed to configure GTK"); 1190 goto failed; 1191 } 1192 1193 if (ieee80211w_set_keys(sm, &ie) < 0) { 1194 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1195 "RSN: Failed to configure IGTK"); 1196 goto failed; 1197 } 1198 1199 wpa_sm_set_rekey_offload(sm); 1200 1201 return; 1202 1203failed: 1204 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1205} 1206 1207 1208static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1209 const u8 *keydata, 1210 size_t keydatalen, 1211 u16 key_info, 1212 struct wpa_gtk_data *gd) 1213{ 1214 int maxkeylen; 1215 struct wpa_eapol_ie_parse ie; 1216 1217 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); 1218 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1219 return -1; 1220 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1221 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1222 "WPA: GTK IE in unencrypted key data"); 1223 return -1; 1224 } 1225 if (ie.gtk == NULL) { 1226 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1227 "WPA: No GTK IE in Group Key msg 1/2"); 1228 return -1; 1229 } 1230 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1231 1232 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1233 gd->gtk_len, maxkeylen, 1234 &gd->key_rsc_len, &gd->alg)) 1235 return -1; 1236 1237 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", 1238 ie.gtk, ie.gtk_len); 1239 gd->keyidx = ie.gtk[0] & 0x3; 1240 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1241 !!(ie.gtk[0] & BIT(2))); 1242 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1243 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1244 "RSN: Too long GTK in GTK IE (len=%lu)", 1245 (unsigned long) ie.gtk_len - 2); 1246 return -1; 1247 } 1248 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1249 1250 if (ieee80211w_set_keys(sm, &ie) < 0) 1251 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1252 "RSN: Failed to configure IGTK"); 1253 1254 return 0; 1255} 1256 1257 1258static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1259 const struct wpa_eapol_key *key, 1260 size_t keydatalen, int key_info, 1261 size_t extra_len, u16 ver, 1262 struct wpa_gtk_data *gd) 1263{ 1264 size_t maxkeylen; 1265 u8 ek[32]; 1266 1267 gd->gtk_len = WPA_GET_BE16(key->key_length); 1268 maxkeylen = keydatalen; 1269 if (keydatalen > extra_len) { 1270 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1271 "WPA: Truncated EAPOL-Key packet: " 1272 "key_data_length=%lu > extra_len=%lu", 1273 (unsigned long) keydatalen, (unsigned long) extra_len); 1274 return -1; 1275 } 1276 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1277 if (maxkeylen < 8) { 1278 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1279 "WPA: Too short maxkeylen (%lu)", 1280 (unsigned long) maxkeylen); 1281 return -1; 1282 } 1283 maxkeylen -= 8; 1284 } 1285 1286 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1287 gd->gtk_len, maxkeylen, 1288 &gd->key_rsc_len, &gd->alg)) 1289 return -1; 1290 1291 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1292 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1293 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1294 os_memcpy(ek, key->key_iv, 16); 1295 os_memcpy(ek + 16, sm->ptk.kek, 16); 1296 if (keydatalen > sizeof(gd->gtk)) { 1297 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1298 "WPA: RC4 key data too long (%lu)", 1299 (unsigned long) keydatalen); 1300 return -1; 1301 } 1302 os_memcpy(gd->gtk, key + 1, keydatalen); 1303 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { 1304 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1305 "WPA: RC4 failed"); 1306 return -1; 1307 } 1308 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1309 if (keydatalen % 8) { 1310 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1311 "WPA: Unsupported AES-WRAP len %lu", 1312 (unsigned long) keydatalen); 1313 return -1; 1314 } 1315 if (maxkeylen > sizeof(gd->gtk)) { 1316 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1317 "WPA: AES-WRAP key data " 1318 "too long (keydatalen=%lu maxkeylen=%lu)", 1319 (unsigned long) keydatalen, 1320 (unsigned long) maxkeylen); 1321 return -1; 1322 } 1323 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, 1324 (const u8 *) (key + 1), gd->gtk)) { 1325 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1326 "WPA: AES unwrap failed - could not decrypt " 1327 "GTK"); 1328 return -1; 1329 } 1330 } else { 1331 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1332 "WPA: Unsupported key_info type %d", ver); 1333 return -1; 1334 } 1335 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1336 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1337 return 0; 1338} 1339 1340 1341static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1342 const struct wpa_eapol_key *key, 1343 int ver, u16 key_info) 1344{ 1345 size_t rlen; 1346 struct wpa_eapol_key *reply; 1347 u8 *rbuf; 1348 1349 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1350 sizeof(*reply), &rlen, (void *) &reply); 1351 if (rbuf == NULL) 1352 return -1; 1353 1354 reply->type = sm->proto == WPA_PROTO_RSN ? 1355 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1356 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1357 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; 1358 WPA_PUT_BE16(reply->key_info, key_info); 1359 if (sm->proto == WPA_PROTO_RSN) 1360 WPA_PUT_BE16(reply->key_length, 0); 1361 else 1362 os_memcpy(reply->key_length, key->key_length, 2); 1363 os_memcpy(reply->replay_counter, key->replay_counter, 1364 WPA_REPLAY_COUNTER_LEN); 1365 1366 WPA_PUT_BE16(reply->key_data_length, 0); 1367 1368 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1369 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, 1370 rbuf, rlen, reply->key_mic); 1371 1372 return 0; 1373} 1374 1375 1376static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1377 const unsigned char *src_addr, 1378 const struct wpa_eapol_key *key, 1379 int extra_len, u16 ver) 1380{ 1381 u16 key_info, keydatalen; 1382 int rekey, ret; 1383 struct wpa_gtk_data gd; 1384 1385 os_memset(&gd, 0, sizeof(gd)); 1386 1387 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1388 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1389 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1390 1391 key_info = WPA_GET_BE16(key->key_info); 1392 keydatalen = WPA_GET_BE16(key->key_data_length); 1393 1394 if (sm->proto == WPA_PROTO_RSN) { 1395 ret = wpa_supplicant_process_1_of_2_rsn(sm, 1396 (const u8 *) (key + 1), 1397 keydatalen, key_info, 1398 &gd); 1399 } else { 1400 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, 1401 key_info, extra_len, 1402 ver, &gd); 1403 } 1404 1405 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1406 1407 if (ret) 1408 goto failed; 1409 1410 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc, 0) || 1411 wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) 1412 goto failed; 1413 1414 if (rekey) { 1415 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Group rekeying " 1416 "completed with " MACSTR " [GTK=%s]", 1417 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1418 wpa_sm_cancel_auth_timeout(sm); 1419 wpa_sm_set_state(sm, WPA_COMPLETED); 1420 1421 wpa_sm_set_rekey_offload(sm); 1422 } else { 1423 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1424 key_info & 1425 WPA_KEY_INFO_SECURE); 1426 } 1427 return; 1428 1429failed: 1430 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1431} 1432 1433 1434static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1435 struct wpa_eapol_key *key, 1436 u16 ver, 1437 const u8 *buf, size_t len) 1438{ 1439 u8 mic[16]; 1440 int ok = 0; 1441 1442 os_memcpy(mic, key->key_mic, 16); 1443 if (sm->tptk_set) { 1444 os_memset(key->key_mic, 0, 16); 1445 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, 1446 key->key_mic); 1447 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1448 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1449 "WPA: Invalid EAPOL-Key MIC " 1450 "when using TPTK - ignoring TPTK"); 1451 } else { 1452 ok = 1; 1453 sm->tptk_set = 0; 1454 sm->ptk_set = 1; 1455 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1456 } 1457 } 1458 1459 if (!ok && sm->ptk_set) { 1460 os_memset(key->key_mic, 0, 16); 1461 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len, 1462 key->key_mic); 1463 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1464 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1465 "WPA: Invalid EAPOL-Key MIC - " 1466 "dropping packet"); 1467 return -1; 1468 } 1469 ok = 1; 1470 } 1471 1472 if (!ok) { 1473 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1474 "WPA: Could not verify EAPOL-Key MIC - " 1475 "dropping packet"); 1476 return -1; 1477 } 1478 1479 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1480 WPA_REPLAY_COUNTER_LEN); 1481 sm->rx_replay_counter_set = 1; 1482 return 0; 1483} 1484 1485 1486/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ 1487static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, 1488 struct wpa_eapol_key *key, u16 ver) 1489{ 1490 u16 keydatalen = WPA_GET_BE16(key->key_data_length); 1491 1492 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", 1493 (u8 *) (key + 1), keydatalen); 1494 if (!sm->ptk_set) { 1495 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1496 "WPA: PTK not available, cannot decrypt EAPOL-Key Key " 1497 "Data"); 1498 return -1; 1499 } 1500 1501 /* Decrypt key data here so that this operation does not need 1502 * to be implemented separately for each message type. */ 1503 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1504 u8 ek[32]; 1505 os_memcpy(ek, key->key_iv, 16); 1506 os_memcpy(ek + 16, sm->ptk.kek, 16); 1507 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) { 1508 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1509 "WPA: RC4 failed"); 1510 return -1; 1511 } 1512 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1513 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1514 u8 *buf; 1515 if (keydatalen % 8) { 1516 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1517 "WPA: Unsupported AES-WRAP len %d", 1518 keydatalen); 1519 return -1; 1520 } 1521 keydatalen -= 8; /* AES-WRAP adds 8 bytes */ 1522 buf = os_malloc(keydatalen); 1523 if (buf == NULL) { 1524 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1525 "WPA: No memory for AES-UNWRAP buffer"); 1526 return -1; 1527 } 1528 if (aes_unwrap(sm->ptk.kek, keydatalen / 8, 1529 (u8 *) (key + 1), buf)) { 1530 os_free(buf); 1531 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1532 "WPA: AES unwrap failed - " 1533 "could not decrypt EAPOL-Key key data"); 1534 return -1; 1535 } 1536 os_memcpy(key + 1, buf, keydatalen); 1537 os_free(buf); 1538 WPA_PUT_BE16(key->key_data_length, keydatalen); 1539 } else { 1540 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1541 "WPA: Unsupported key_info type %d", ver); 1542 return -1; 1543 } 1544 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 1545 (u8 *) (key + 1), keydatalen); 1546 return 0; 1547} 1548 1549 1550/** 1551 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 1552 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1553 */ 1554void wpa_sm_aborted_cached(struct wpa_sm *sm) 1555{ 1556 if (sm && sm->cur_pmksa) { 1557 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1558 "RSN: Cancelling PMKSA caching attempt"); 1559 sm->cur_pmksa = NULL; 1560 } 1561} 1562 1563 1564static void wpa_eapol_key_dump(struct wpa_sm *sm, 1565 const struct wpa_eapol_key *key) 1566{ 1567#ifndef CONFIG_NO_STDOUT_DEBUG 1568 u16 key_info = WPA_GET_BE16(key->key_info); 1569 1570 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 1571 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1572 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 1573 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 1574 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1575 WPA_KEY_INFO_KEY_INDEX_SHIFT, 1576 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 1577 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 1578 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 1579 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 1580 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 1581 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 1582 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 1583 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 1584 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 1585 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1586 " key_length=%u key_data_length=%u", 1587 WPA_GET_BE16(key->key_length), 1588 WPA_GET_BE16(key->key_data_length)); 1589 wpa_hexdump(MSG_DEBUG, " replay_counter", 1590 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 1591 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 1592 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 1593 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 1594 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 1595 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); 1596#endif /* CONFIG_NO_STDOUT_DEBUG */ 1597} 1598 1599 1600/** 1601 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 1602 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1603 * @src_addr: Source MAC address of the EAPOL packet 1604 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 1605 * @len: Length of the EAPOL frame 1606 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 1607 * 1608 * This function is called for each received EAPOL frame. Other than EAPOL-Key 1609 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 1610 * only processing WPA and WPA2 EAPOL-Key frames. 1611 * 1612 * The received EAPOL-Key packets are validated and valid packets are replied 1613 * to. In addition, key material (PTK, GTK) is configured at the end of a 1614 * successful key handshake. 1615 */ 1616int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 1617 const u8 *buf, size_t len) 1618{ 1619 size_t plen, data_len, extra_len; 1620 struct ieee802_1x_hdr *hdr; 1621 struct wpa_eapol_key *key; 1622 u16 key_info, ver; 1623 u8 *tmp; 1624 int ret = -1; 1625 struct wpa_peerkey *peerkey = NULL; 1626 1627#ifdef CONFIG_IEEE80211R 1628 sm->ft_completed = 0; 1629#endif /* CONFIG_IEEE80211R */ 1630 1631 if (len < sizeof(*hdr) + sizeof(*key)) { 1632 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1633 "WPA: EAPOL frame too short to be a WPA " 1634 "EAPOL-Key (len %lu, expecting at least %lu)", 1635 (unsigned long) len, 1636 (unsigned long) sizeof(*hdr) + sizeof(*key)); 1637 return 0; 1638 } 1639 1640 tmp = os_malloc(len); 1641 if (tmp == NULL) 1642 return -1; 1643 os_memcpy(tmp, buf, len); 1644 1645 hdr = (struct ieee802_1x_hdr *) tmp; 1646 key = (struct wpa_eapol_key *) (hdr + 1); 1647 plen = be_to_host16(hdr->length); 1648 data_len = plen + sizeof(*hdr); 1649 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1650 "IEEE 802.1X RX: version=%d type=%d length=%lu", 1651 hdr->version, hdr->type, (unsigned long) plen); 1652 1653 if (hdr->version < EAPOL_VERSION) { 1654 /* TODO: backwards compatibility */ 1655 } 1656 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 1657 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1658 "WPA: EAPOL frame (type %u) discarded, " 1659 "not a Key frame", hdr->type); 1660 ret = 0; 1661 goto out; 1662 } 1663 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { 1664 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1665 "WPA: EAPOL frame payload size %lu " 1666 "invalid (frame size %lu)", 1667 (unsigned long) plen, (unsigned long) len); 1668 ret = 0; 1669 goto out; 1670 } 1671 1672 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) 1673 { 1674 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1675 "WPA: EAPOL-Key type (%d) unknown, discarded", 1676 key->type); 1677 ret = 0; 1678 goto out; 1679 } 1680 wpa_eapol_key_dump(sm, key); 1681 1682 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 1683 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len); 1684 if (data_len < len) { 1685 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1686 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 1687 (unsigned long) len - data_len); 1688 } 1689 key_info = WPA_GET_BE16(key->key_info); 1690 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 1691 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 1692#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 1693 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1694#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 1695 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1696 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1697 "WPA: Unsupported EAPOL-Key descriptor version %d", 1698 ver); 1699 goto out; 1700 } 1701 1702#ifdef CONFIG_IEEE80211R 1703 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 1704 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 1705 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1706 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1707 "FT: AP did not use AES-128-CMAC"); 1708 goto out; 1709 } 1710 } else 1711#endif /* CONFIG_IEEE80211R */ 1712#ifdef CONFIG_IEEE80211W 1713 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 1714 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1715 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1716 "WPA: AP did not use the " 1717 "negotiated AES-128-CMAC"); 1718 goto out; 1719 } 1720 } else 1721#endif /* CONFIG_IEEE80211W */ 1722 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 1723 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1724 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1725 "WPA: CCMP is used, but EAPOL-Key " 1726 "descriptor version (%d) is not 2", ver); 1727 if (sm->group_cipher != WPA_CIPHER_CCMP && 1728 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 1729 /* Earlier versions of IEEE 802.11i did not explicitly 1730 * require version 2 descriptor for all EAPOL-Key 1731 * packets, so allow group keys to use version 1 if 1732 * CCMP is not used for them. */ 1733 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1734 "WPA: Backwards compatibility: allow invalid " 1735 "version for non-CCMP group keys"); 1736 } else 1737 goto out; 1738 } 1739 if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 1740 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1741 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1742 "WPA: GCMP is used, but EAPOL-Key " 1743 "descriptor version (%d) is not 2", ver); 1744 goto out; 1745 } 1746 1747#ifdef CONFIG_PEERKEY 1748 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 1749 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 1750 break; 1751 } 1752 1753 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { 1754 if (!peerkey->initiator && peerkey->replay_counter_set && 1755 os_memcmp(key->replay_counter, peerkey->replay_counter, 1756 WPA_REPLAY_COUNTER_LEN) <= 0) { 1757 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1758 "RSN: EAPOL-Key Replay Counter did not " 1759 "increase (STK) - dropping packet"); 1760 goto out; 1761 } else if (peerkey->initiator) { 1762 u8 _tmp[WPA_REPLAY_COUNTER_LEN]; 1763 os_memcpy(_tmp, key->replay_counter, 1764 WPA_REPLAY_COUNTER_LEN); 1765 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); 1766 if (os_memcmp(_tmp, peerkey->replay_counter, 1767 WPA_REPLAY_COUNTER_LEN) != 0) { 1768 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1769 "RSN: EAPOL-Key Replay " 1770 "Counter did not match (STK) - " 1771 "dropping packet"); 1772 goto out; 1773 } 1774 } 1775 } 1776 1777 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { 1778 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1779 "RSN: Ack bit in key_info from STK peer"); 1780 goto out; 1781 } 1782#endif /* CONFIG_PEERKEY */ 1783 1784 if (!peerkey && sm->rx_replay_counter_set && 1785 os_memcmp(key->replay_counter, sm->rx_replay_counter, 1786 WPA_REPLAY_COUNTER_LEN) <= 0) { 1787 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1788 "WPA: EAPOL-Key Replay Counter did not increase - " 1789 "dropping packet"); 1790 goto out; 1791 } 1792 1793 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) 1794#ifdef CONFIG_PEERKEY 1795 && (peerkey == NULL || !peerkey->initiator) 1796#endif /* CONFIG_PEERKEY */ 1797 ) { 1798 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1799 "WPA: No Ack bit in key_info"); 1800 goto out; 1801 } 1802 1803 if (key_info & WPA_KEY_INFO_REQUEST) { 1804 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1805 "WPA: EAPOL-Key with Request bit - dropped"); 1806 goto out; 1807 } 1808 1809 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && 1810 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 1811 goto out; 1812 1813#ifdef CONFIG_PEERKEY 1814 if ((key_info & WPA_KEY_INFO_MIC) && peerkey && 1815 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) 1816 goto out; 1817#endif /* CONFIG_PEERKEY */ 1818 1819 extra_len = data_len - sizeof(*hdr) - sizeof(*key); 1820 1821 if (WPA_GET_BE16(key->key_data_length) > extra_len) { 1822 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 1823 "frame - key_data overflow (%d > %lu)", 1824 WPA_GET_BE16(key->key_data_length), 1825 (unsigned long) extra_len); 1826 goto out; 1827 } 1828 extra_len = WPA_GET_BE16(key->key_data_length); 1829 1830 if (sm->proto == WPA_PROTO_RSN && 1831 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1832 /* 1833 * Only decrypt the Key Data field if the frame's authenticity 1834 * was verified. When using AES-SIV (FILS), the MIC flag is not 1835 * set, so this check should only be performed if mic_len != 0 1836 * which is the case in this code branch. 1837 */ 1838 if (!(key_info & WPA_KEY_INFO_MIC)) { 1839 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1840 "WPA: Ignore EAPOL-Key with encrypted but unauthenticated data"); 1841 goto out; 1842 } 1843 if (wpa_supplicant_decrypt_key_data(sm, key, ver)) 1844 goto out; 1845 extra_len = WPA_GET_BE16(key->key_data_length); 1846 } 1847 1848 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 1849 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 1850 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1851 "WPA: Ignored EAPOL-Key (Pairwise) with " 1852 "non-zero key index"); 1853 goto out; 1854 } 1855 if (peerkey) { 1856 /* PeerKey 4-Way Handshake */ 1857 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); 1858 } else if (key_info & WPA_KEY_INFO_MIC) { 1859 /* 3/4 4-Way Handshake */ 1860 wpa_supplicant_process_3_of_4(sm, key, ver); 1861 } else { 1862 /* 1/4 4-Way Handshake */ 1863 wpa_supplicant_process_1_of_4(sm, src_addr, key, 1864 ver); 1865 } 1866 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 1867 /* PeerKey SMK Handshake */ 1868 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info, 1869 ver); 1870 } else { 1871 if (key_info & WPA_KEY_INFO_MIC) { 1872 /* 1/2 Group Key Handshake */ 1873 wpa_supplicant_process_1_of_2(sm, src_addr, key, 1874 extra_len, ver); 1875 } else { 1876 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1877 "WPA: EAPOL-Key (Group) without Mic bit - " 1878 "dropped"); 1879 } 1880 } 1881 1882 ret = 1; 1883 1884out: 1885 os_free(tmp); 1886 return ret; 1887} 1888 1889 1890#ifdef CONFIG_CTRL_IFACE 1891static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 1892{ 1893 switch (sm->key_mgmt) { 1894 case WPA_KEY_MGMT_IEEE8021X: 1895 return (sm->proto == WPA_PROTO_RSN ? 1896 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 1897 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 1898 case WPA_KEY_MGMT_PSK: 1899 return (sm->proto == WPA_PROTO_RSN ? 1900 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 1901 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 1902#ifdef CONFIG_IEEE80211R 1903 case WPA_KEY_MGMT_FT_IEEE8021X: 1904 return RSN_AUTH_KEY_MGMT_FT_802_1X; 1905 case WPA_KEY_MGMT_FT_PSK: 1906 return RSN_AUTH_KEY_MGMT_FT_PSK; 1907#endif /* CONFIG_IEEE80211R */ 1908#ifdef CONFIG_IEEE80211W 1909 case WPA_KEY_MGMT_IEEE8021X_SHA256: 1910 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 1911 case WPA_KEY_MGMT_PSK_SHA256: 1912 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 1913#endif /* CONFIG_IEEE80211W */ 1914 case WPA_KEY_MGMT_CCKM: 1915 return (sm->proto == WPA_PROTO_RSN ? 1916 RSN_AUTH_KEY_MGMT_CCKM: 1917 WPA_AUTH_KEY_MGMT_CCKM); 1918 case WPA_KEY_MGMT_WPA_NONE: 1919 return WPA_AUTH_KEY_MGMT_NONE; 1920 default: 1921 return 0; 1922 } 1923} 1924 1925 1926#define RSN_SUITE "%02x-%02x-%02x-%d" 1927#define RSN_SUITE_ARG(s) \ 1928((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 1929 1930/** 1931 * wpa_sm_get_mib - Dump text list of MIB entries 1932 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1933 * @buf: Buffer for the list 1934 * @buflen: Length of the buffer 1935 * Returns: Number of bytes written to buffer 1936 * 1937 * This function is used fetch dot11 MIB variables. 1938 */ 1939int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 1940{ 1941 char pmkid_txt[PMKID_LEN * 2 + 1]; 1942 int rsna, ret; 1943 size_t len; 1944 1945 if (sm->cur_pmksa) { 1946 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 1947 sm->cur_pmksa->pmkid, PMKID_LEN); 1948 } else 1949 pmkid_txt[0] = '\0'; 1950 1951 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 1952 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 1953 sm->proto == WPA_PROTO_RSN) 1954 rsna = 1; 1955 else 1956 rsna = 0; 1957 1958 ret = os_snprintf(buf, buflen, 1959 "dot11RSNAOptionImplemented=TRUE\n" 1960 "dot11RSNAPreauthenticationImplemented=TRUE\n" 1961 "dot11RSNAEnabled=%s\n" 1962 "dot11RSNAPreauthenticationEnabled=%s\n" 1963 "dot11RSNAConfigVersion=%d\n" 1964 "dot11RSNAConfigPairwiseKeysSupported=5\n" 1965 "dot11RSNAConfigGroupCipherSize=%d\n" 1966 "dot11RSNAConfigPMKLifetime=%d\n" 1967 "dot11RSNAConfigPMKReauthThreshold=%d\n" 1968 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 1969 "dot11RSNAConfigSATimeout=%d\n", 1970 rsna ? "TRUE" : "FALSE", 1971 rsna ? "TRUE" : "FALSE", 1972 RSN_VERSION, 1973 wpa_cipher_key_len(sm->group_cipher) * 8, 1974 sm->dot11RSNAConfigPMKLifetime, 1975 sm->dot11RSNAConfigPMKReauthThreshold, 1976 sm->dot11RSNAConfigSATimeout); 1977 if (ret < 0 || (size_t) ret >= buflen) 1978 return 0; 1979 len = ret; 1980 1981 ret = os_snprintf( 1982 buf + len, buflen - len, 1983 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 1984 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 1985 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 1986 "dot11RSNAPMKIDUsed=%s\n" 1987 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 1988 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 1989 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 1990 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 1991 "dot11RSNA4WayHandshakeFailures=%u\n", 1992 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1993 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1994 sm->pairwise_cipher)), 1995 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 1996 sm->group_cipher)), 1997 pmkid_txt, 1998 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 1999 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2000 sm->pairwise_cipher)), 2001 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2002 sm->group_cipher)), 2003 sm->dot11RSNA4WayHandshakeFailures); 2004 if (ret >= 0 && (size_t) ret < buflen) 2005 len += ret; 2006 2007 return (int) len; 2008} 2009#endif /* CONFIG_CTRL_IFACE */ 2010 2011 2012static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 2013 void *ctx, enum pmksa_free_reason reason) 2014{ 2015 struct wpa_sm *sm = ctx; 2016 int deauth = 0; 2017 2018 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " 2019 MACSTR " reason=%d", MAC2STR(entry->aa), reason); 2020 2021 if (sm->cur_pmksa == entry) { 2022 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2023 "RSN: %s current PMKSA entry", 2024 reason == PMKSA_REPLACE ? "replaced" : "removed"); 2025 pmksa_cache_clear_current(sm); 2026 2027 /* 2028 * If an entry is simply being replaced, there's no need to 2029 * deauthenticate because it will be immediately re-added. 2030 * This happens when EAP authentication is completed again 2031 * (reauth or failed PMKSA caching attempt). 2032 */ 2033 if (reason != PMKSA_REPLACE) 2034 deauth = 1; 2035 } 2036 2037 if (reason == PMKSA_EXPIRE && 2038 (sm->pmk_len == entry->pmk_len && 2039 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2040 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2041 "RSN: deauthenticating due to expired PMK"); 2042 pmksa_cache_clear_current(sm); 2043 deauth = 1; 2044 } 2045 2046 if (deauth) { 2047 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2048 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2049 } 2050} 2051 2052 2053/** 2054 * wpa_sm_init - Initialize WPA state machine 2055 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2056 * Returns: Pointer to the allocated WPA state machine data 2057 * 2058 * This function is used to allocate a new WPA state machine and the returned 2059 * value is passed to all WPA state machine calls. 2060 */ 2061struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2062{ 2063 struct wpa_sm *sm; 2064 2065 sm = os_zalloc(sizeof(*sm)); 2066 if (sm == NULL) 2067 return NULL; 2068 dl_list_init(&sm->pmksa_candidates); 2069 sm->renew_snonce = 1; 2070 sm->ctx = ctx; 2071 2072 sm->dot11RSNAConfigPMKLifetime = 43200; 2073 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2074 sm->dot11RSNAConfigSATimeout = 60; 2075 2076 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2077 if (sm->pmksa == NULL) { 2078 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2079 "RSN: PMKSA cache initialization failed"); 2080 os_free(sm); 2081 return NULL; 2082 } 2083 2084 return sm; 2085} 2086 2087 2088/** 2089 * wpa_sm_deinit - Deinitialize WPA state machine 2090 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2091 */ 2092void wpa_sm_deinit(struct wpa_sm *sm) 2093{ 2094 if (sm == NULL) 2095 return; 2096 pmksa_cache_deinit(sm->pmksa); 2097 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2098 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2099 os_free(sm->assoc_wpa_ie); 2100 os_free(sm->ap_wpa_ie); 2101 os_free(sm->ap_rsn_ie); 2102 os_free(sm->ctx); 2103 peerkey_deinit(sm); 2104#ifdef CONFIG_IEEE80211R 2105 os_free(sm->assoc_resp_ies); 2106#endif /* CONFIG_IEEE80211R */ 2107 os_free(sm); 2108} 2109 2110 2111/** 2112 * wpa_sm_notify_assoc - Notify WPA state machine about association 2113 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2114 * @bssid: The BSSID of the new association 2115 * 2116 * This function is called to let WPA state machine know that the connection 2117 * was established. 2118 */ 2119void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2120{ 2121 int clear_keys = 1; 2122 2123 if (sm == NULL) 2124 return; 2125 2126 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2127 "WPA: Association event - clear replay counter"); 2128 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2129 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2130 sm->rx_replay_counter_set = 0; 2131 sm->renew_snonce = 1; 2132 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2133 rsn_preauth_deinit(sm); 2134 2135#ifdef CONFIG_IEEE80211R 2136 if (wpa_ft_is_completed(sm)) { 2137 /* 2138 * Clear portValid to kick EAPOL state machine to re-enter 2139 * AUTHENTICATED state to get the EAPOL port Authorized. 2140 */ 2141 eapol_sm_notify_portValid(sm->eapol, FALSE); 2142 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2143 2144 /* Prepare for the next transition */ 2145 wpa_ft_prepare_auth_request(sm, NULL); 2146 2147 clear_keys = 0; 2148 } 2149#endif /* CONFIG_IEEE80211R */ 2150 2151 if (clear_keys) { 2152 /* 2153 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2154 * this is not part of a Fast BSS Transition. 2155 */ 2156 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2157 sm->ptk_set = 0; 2158 sm->tptk_set = 0; 2159 os_memset(&sm->gtk, 0, sizeof(sm->gtk)); 2160 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); 2161#ifdef CONFIG_IEEE80211W 2162 os_memset(&sm->igtk, 0, sizeof(sm->igtk)); 2163 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); 2164#endif /* CONFIG_IEEE80211W */ 2165 } 2166 2167#ifdef CONFIG_TDLS 2168 wpa_tdls_assoc(sm); 2169#endif /* CONFIG_TDLS */ 2170} 2171 2172 2173/** 2174 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2175 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2176 * 2177 * This function is called to let WPA state machine know that the connection 2178 * was lost. This will abort any existing pre-authentication session. 2179 */ 2180void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2181{ 2182 rsn_preauth_deinit(sm); 2183 pmksa_cache_clear_current(sm); 2184 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2185 sm->dot11RSNA4WayHandshakeFailures++; 2186#ifdef CONFIG_TDLS 2187 wpa_tdls_disassoc(sm); 2188#endif /* CONFIG_TDLS */ 2189#ifdef CONFIG_IEEE80211R 2190 sm->ft_reassoc_completed = 0; 2191#endif /* CONFIG_IEEE80211R */ 2192} 2193 2194 2195/** 2196 * wpa_sm_set_pmk - Set PMK 2197 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2198 * @pmk: The new PMK 2199 * @pmk_len: The length of the new PMK in bytes 2200 * 2201 * Configure the PMK for WPA state machine. 2202 */ 2203void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) 2204{ 2205 if (sm == NULL) 2206 return; 2207 2208 sm->pmk_len = pmk_len; 2209 os_memcpy(sm->pmk, pmk, pmk_len); 2210 2211#ifdef CONFIG_IEEE80211R 2212 /* Set XXKey to be PSK for FT key derivation */ 2213 sm->xxkey_len = pmk_len; 2214 os_memcpy(sm->xxkey, pmk, pmk_len); 2215#endif /* CONFIG_IEEE80211R */ 2216} 2217 2218 2219/** 2220 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2221 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2222 * 2223 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2224 * will be cleared. 2225 */ 2226void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2227{ 2228 if (sm == NULL) 2229 return; 2230 2231 if (sm->cur_pmksa) { 2232 sm->pmk_len = sm->cur_pmksa->pmk_len; 2233 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2234 } else { 2235 sm->pmk_len = PMK_LEN; 2236 os_memset(sm->pmk, 0, PMK_LEN); 2237 } 2238} 2239 2240 2241/** 2242 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2243 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2244 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2245 */ 2246void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2247{ 2248 if (sm) 2249 sm->fast_reauth = fast_reauth; 2250} 2251 2252 2253/** 2254 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2255 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2256 * @scard_ctx: Context pointer for smartcard related callback functions 2257 */ 2258void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2259{ 2260 if (sm == NULL) 2261 return; 2262 sm->scard_ctx = scard_ctx; 2263 if (sm->preauth_eapol) 2264 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2265} 2266 2267 2268/** 2269 * wpa_sm_set_config - Notification of current configration change 2270 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2271 * @config: Pointer to current network configuration 2272 * 2273 * Notify WPA state machine that configuration has changed. config will be 2274 * stored as a backpointer to network configuration. This can be %NULL to clear 2275 * the stored pointed. 2276 */ 2277void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2278{ 2279 if (!sm) 2280 return; 2281 2282 if (config) { 2283 sm->network_ctx = config->network_ctx; 2284 sm->peerkey_enabled = config->peerkey_enabled; 2285 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2286 sm->proactive_key_caching = config->proactive_key_caching; 2287 sm->eap_workaround = config->eap_workaround; 2288 sm->eap_conf_ctx = config->eap_conf_ctx; 2289 if (config->ssid) { 2290 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2291 sm->ssid_len = config->ssid_len; 2292 } else 2293 sm->ssid_len = 0; 2294 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2295 } else { 2296 sm->network_ctx = NULL; 2297 sm->peerkey_enabled = 0; 2298 sm->allowed_pairwise_cipher = 0; 2299 sm->proactive_key_caching = 0; 2300 sm->eap_workaround = 0; 2301 sm->eap_conf_ctx = NULL; 2302 sm->ssid_len = 0; 2303 sm->wpa_ptk_rekey = 0; 2304 } 2305} 2306 2307 2308/** 2309 * wpa_sm_set_own_addr - Set own MAC address 2310 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2311 * @addr: Own MAC address 2312 */ 2313void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2314{ 2315 if (sm) 2316 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2317} 2318 2319 2320/** 2321 * wpa_sm_set_ifname - Set network interface name 2322 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2323 * @ifname: Interface name 2324 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2325 */ 2326void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2327 const char *bridge_ifname) 2328{ 2329 if (sm) { 2330 sm->ifname = ifname; 2331 sm->bridge_ifname = bridge_ifname; 2332 } 2333} 2334 2335 2336/** 2337 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2338 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2339 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2340 */ 2341void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2342{ 2343 if (sm) 2344 sm->eapol = eapol; 2345} 2346 2347 2348/** 2349 * wpa_sm_set_param - Set WPA state machine parameters 2350 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2351 * @param: Parameter field 2352 * @value: Parameter value 2353 * Returns: 0 on success, -1 on failure 2354 */ 2355int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2356 unsigned int value) 2357{ 2358 int ret = 0; 2359 2360 if (sm == NULL) 2361 return -1; 2362 2363 switch (param) { 2364 case RSNA_PMK_LIFETIME: 2365 if (value > 0) 2366 sm->dot11RSNAConfigPMKLifetime = value; 2367 else 2368 ret = -1; 2369 break; 2370 case RSNA_PMK_REAUTH_THRESHOLD: 2371 if (value > 0 && value <= 100) 2372 sm->dot11RSNAConfigPMKReauthThreshold = value; 2373 else 2374 ret = -1; 2375 break; 2376 case RSNA_SA_TIMEOUT: 2377 if (value > 0) 2378 sm->dot11RSNAConfigSATimeout = value; 2379 else 2380 ret = -1; 2381 break; 2382 case WPA_PARAM_PROTO: 2383 sm->proto = value; 2384 break; 2385 case WPA_PARAM_PAIRWISE: 2386 sm->pairwise_cipher = value; 2387 break; 2388 case WPA_PARAM_GROUP: 2389 sm->group_cipher = value; 2390 break; 2391 case WPA_PARAM_KEY_MGMT: 2392 sm->key_mgmt = value; 2393 break; 2394#ifdef CONFIG_IEEE80211W 2395 case WPA_PARAM_MGMT_GROUP: 2396 sm->mgmt_group_cipher = value; 2397 break; 2398#endif /* CONFIG_IEEE80211W */ 2399 case WPA_PARAM_RSN_ENABLED: 2400 sm->rsn_enabled = value; 2401 break; 2402 case WPA_PARAM_MFP: 2403 sm->mfp = value; 2404 break; 2405 default: 2406 break; 2407 } 2408 2409 return ret; 2410} 2411 2412 2413/** 2414 * wpa_sm_get_param - Get WPA state machine parameters 2415 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2416 * @param: Parameter field 2417 * Returns: Parameter value 2418 */ 2419unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param) 2420{ 2421 if (sm == NULL) 2422 return 0; 2423 2424 switch (param) { 2425 case RSNA_PMK_LIFETIME: 2426 return sm->dot11RSNAConfigPMKLifetime; 2427 case RSNA_PMK_REAUTH_THRESHOLD: 2428 return sm->dot11RSNAConfigPMKReauthThreshold; 2429 case RSNA_SA_TIMEOUT: 2430 return sm->dot11RSNAConfigSATimeout; 2431 case WPA_PARAM_PROTO: 2432 return sm->proto; 2433 case WPA_PARAM_PAIRWISE: 2434 return sm->pairwise_cipher; 2435 case WPA_PARAM_GROUP: 2436 return sm->group_cipher; 2437 case WPA_PARAM_KEY_MGMT: 2438 return sm->key_mgmt; 2439#ifdef CONFIG_IEEE80211W 2440 case WPA_PARAM_MGMT_GROUP: 2441 return sm->mgmt_group_cipher; 2442#endif /* CONFIG_IEEE80211W */ 2443 case WPA_PARAM_RSN_ENABLED: 2444 return sm->rsn_enabled; 2445 default: 2446 return 0; 2447 } 2448} 2449 2450 2451/** 2452 * wpa_sm_get_status - Get WPA state machine 2453 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2454 * @buf: Buffer for status information 2455 * @buflen: Maximum buffer length 2456 * @verbose: Whether to include verbose status information 2457 * Returns: Number of bytes written to buf. 2458 * 2459 * Query WPA state machine for status information. This function fills in 2460 * a text area with current status information. If the buffer (buf) is not 2461 * large enough, status information will be truncated to fit the buffer. 2462 */ 2463int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 2464 int verbose) 2465{ 2466 char *pos = buf, *end = buf + buflen; 2467 int ret; 2468 2469 ret = os_snprintf(pos, end - pos, 2470 "pairwise_cipher=%s\n" 2471 "group_cipher=%s\n" 2472 "key_mgmt=%s\n", 2473 wpa_cipher_txt(sm->pairwise_cipher), 2474 wpa_cipher_txt(sm->group_cipher), 2475 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 2476 if (ret < 0 || ret >= end - pos) 2477 return pos - buf; 2478 pos += ret; 2479 2480 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { 2481 struct wpa_ie_data rsn; 2482 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) 2483 >= 0 && 2484 rsn.capabilities & (WPA_CAPABILITY_MFPR | 2485 WPA_CAPABILITY_MFPC)) { 2486 ret = os_snprintf(pos, end - pos, "pmf=%d\n", 2487 (rsn.capabilities & 2488 WPA_CAPABILITY_MFPR) ? 2 : 1); 2489 if (ret < 0 || ret >= end - pos) 2490 return pos - buf; 2491 pos += ret; 2492 } 2493 } 2494 2495 return pos - buf; 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#ifndef CONFIG_NO_WPA2 2674 return pmksa_cache_list(sm->pmksa, buf, len); 2675#else /* CONFIG_NO_WPA2 */ 2676 return -1; 2677#endif /* CONFIG_NO_WPA2 */ 2678} 2679 2680 2681void wpa_sm_drop_sa(struct wpa_sm *sm) 2682{ 2683 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 2684 sm->ptk_set = 0; 2685 sm->tptk_set = 0; 2686 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2687 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2688 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2689 os_memset(&sm->gtk, 0, sizeof(sm->gtk)); 2690 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); 2691#ifdef CONFIG_IEEE80211W 2692 os_memset(&sm->igtk, 0, sizeof(sm->igtk)); 2693 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); 2694#endif /* CONFIG_IEEE80211W */ 2695} 2696 2697 2698int wpa_sm_has_ptk(struct wpa_sm *sm) 2699{ 2700 if (sm == NULL) 2701 return 0; 2702 return sm->ptk_set; 2703} 2704 2705 2706void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 2707{ 2708 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 2709} 2710 2711 2712void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 2713{ 2714#ifndef CONFIG_NO_WPA2 2715 pmksa_cache_flush(sm->pmksa, network_ctx); 2716#endif /* CONFIG_NO_WPA2 */ 2717} 2718 2719 2720#ifdef CONFIG_WNM 2721int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 2722{ 2723 struct wpa_gtk_data gd; 2724#ifdef CONFIG_IEEE80211W 2725 struct wpa_igtk_kde igd; 2726 u16 keyidx; 2727#endif /* CONFIG_IEEE80211W */ 2728 u16 keyinfo; 2729 u8 keylen; /* plaintext key len */ 2730 u8 *key_rsc; 2731 2732 os_memset(&gd, 0, sizeof(gd)); 2733#ifdef CONFIG_IEEE80211W 2734 os_memset(&igd, 0, sizeof(igd)); 2735#endif /* CONFIG_IEEE80211W */ 2736 2737 keylen = wpa_cipher_key_len(sm->group_cipher); 2738 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); 2739 gd.alg = wpa_cipher_to_alg(sm->group_cipher); 2740 if (gd.alg == WPA_ALG_NONE) { 2741 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 2742 return -1; 2743 } 2744 2745 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 2746 key_rsc = buf + 5; 2747 keyinfo = WPA_GET_LE16(buf + 2); 2748 gd.gtk_len = keylen; 2749 if (gd.gtk_len != buf[4]) { 2750 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 2751 gd.gtk_len, buf[4]); 2752 return -1; 2753 } 2754 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 2755 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 2756 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 2757 2758 os_memcpy(gd.gtk, buf + 13, gd.gtk_len); 2759 2760 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 2761 gd.gtk, gd.gtk_len); 2762 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 1)) { 2763 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 2764 "WNM mode"); 2765 return -1; 2766 } 2767#ifdef CONFIG_IEEE80211W 2768 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 2769 const struct wpa_igtk_kde *igtk; 2770 2771 igtk = (const struct wpa_igtk_kde *) (buf + 2); 2772 if (wpa_supplicant_install_igtk(sm, igtk, 1) < 0) 2773 return -1; 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