wpa.c revision 61d9df3e62aaa0e87ad05452fcb95142159a17b6
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 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 521 "WPA: Installing PTK to the driver"); 522 523 switch (sm->pairwise_cipher) { 524 case WPA_CIPHER_CCMP: 525 alg = WPA_ALG_CCMP; 526 keylen = 16; 527 rsclen = 6; 528 break; 529 case WPA_CIPHER_GCMP: 530 alg = WPA_ALG_GCMP; 531 keylen = 16; 532 rsclen = 6; 533 break; 534 case WPA_CIPHER_TKIP: 535 alg = WPA_ALG_TKIP; 536 keylen = 32; 537 rsclen = 6; 538 break; 539 case WPA_CIPHER_NONE: 540 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " 541 "Suite: NONE - do not use pairwise keys"); 542 return 0; 543 default: 544 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 545 "WPA: Unsupported pairwise cipher %d", 546 sm->pairwise_cipher); 547 return -1; 548 } 549 550 if (sm->proto == WPA_PROTO_RSN) { 551 key_rsc = null_rsc; 552 } else { 553 key_rsc = key->key_rsc; 554 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); 555 } 556 557 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, 558 (u8 *) sm->ptk.tk1, keylen) < 0) { 559 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 560 "WPA: Failed to set PTK to the " 561 "driver (alg=%d keylen=%d bssid=" MACSTR ")", 562 alg, keylen, MAC2STR(sm->bssid)); 563 return -1; 564 } 565 566 if (sm->wpa_ptk_rekey) { 567 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 568 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, 569 sm, NULL); 570 } 571 572 return 0; 573} 574 575 576static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, 577 int group_cipher, 578 int keylen, int maxkeylen, 579 int *key_rsc_len, 580 enum wpa_alg *alg) 581{ 582 int ret = 0; 583 584 switch (group_cipher) { 585 case WPA_CIPHER_CCMP: 586 if (keylen != 16 || maxkeylen < 16) { 587 ret = -1; 588 break; 589 } 590 *key_rsc_len = 6; 591 *alg = WPA_ALG_CCMP; 592 break; 593 case WPA_CIPHER_GCMP: 594 if (keylen != 16 || maxkeylen < 16) { 595 ret = -1; 596 break; 597 } 598 *key_rsc_len = 6; 599 *alg = WPA_ALG_GCMP; 600 break; 601 case WPA_CIPHER_TKIP: 602 if (keylen != 32 || maxkeylen < 32) { 603 ret = -1; 604 break; 605 } 606 *key_rsc_len = 6; 607 *alg = WPA_ALG_TKIP; 608 break; 609 case WPA_CIPHER_WEP104: 610 if (keylen != 13 || maxkeylen < 13) { 611 ret = -1; 612 break; 613 } 614 *key_rsc_len = 0; 615 *alg = WPA_ALG_WEP; 616 break; 617 case WPA_CIPHER_WEP40: 618 if (keylen != 5 || maxkeylen < 5) { 619 ret = -1; 620 break; 621 } 622 *key_rsc_len = 0; 623 *alg = WPA_ALG_WEP; 624 break; 625 default: 626 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 627 "WPA: Unsupported Group Cipher %d", 628 group_cipher); 629 return -1; 630 } 631 632 if (ret < 0 ) { 633 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 634 "WPA: Unsupported %s Group Cipher key length %d (%d)", 635 wpa_cipher_txt(group_cipher), keylen, maxkeylen); 636 } 637 638 return ret; 639} 640 641 642struct wpa_gtk_data { 643 enum wpa_alg alg; 644 int tx, key_rsc_len, keyidx; 645 u8 gtk[32]; 646 int gtk_len; 647}; 648 649 650static int wpa_supplicant_install_gtk(struct wpa_sm *sm, 651 const struct wpa_gtk_data *gd, 652 const u8 *key_rsc) 653{ 654 const u8 *_gtk = gd->gtk; 655 u8 gtk_buf[32]; 656 657 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); 658 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 659 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", 660 gd->keyidx, gd->tx, gd->gtk_len); 661 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); 662 if (sm->group_cipher == WPA_CIPHER_TKIP) { 663 /* Swap Tx/Rx keys for Michael MIC */ 664 os_memcpy(gtk_buf, gd->gtk, 16); 665 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); 666 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); 667 _gtk = gtk_buf; 668 } 669 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 670 if (wpa_sm_set_key(sm, gd->alg, NULL, 671 gd->keyidx, 1, key_rsc, gd->key_rsc_len, 672 _gtk, gd->gtk_len) < 0) { 673 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 674 "WPA: Failed to set GTK to the driver " 675 "(Group only)"); 676 return -1; 677 } 678 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, 679 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, 680 _gtk, gd->gtk_len) < 0) { 681 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 682 "WPA: Failed to set GTK to " 683 "the driver (alg=%d keylen=%d keyidx=%d)", 684 gd->alg, gd->gtk_len, gd->keyidx); 685 return -1; 686 } 687 688 return 0; 689} 690 691 692static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, 693 int tx) 694{ 695 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { 696 /* Ignore Tx bit for GTK if a pairwise key is used. One AP 697 * seemed to set this bit (incorrectly, since Tx is only when 698 * doing Group Key only APs) and without this workaround, the 699 * data connection does not work because wpa_supplicant 700 * configured non-zero keyidx to be used for unicast. */ 701 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 702 "WPA: Tx bit set for GTK, but pairwise " 703 "keys are used - ignore Tx bit"); 704 return 0; 705 } 706 return tx; 707} 708 709 710static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, 711 const struct wpa_eapol_key *key, 712 const u8 *gtk, size_t gtk_len, 713 int key_info) 714{ 715#ifndef CONFIG_NO_WPA2 716 struct wpa_gtk_data gd; 717 718 /* 719 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x 720 * GTK KDE format: 721 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] 722 * Reserved [bits 0-7] 723 * GTK 724 */ 725 726 os_memset(&gd, 0, sizeof(gd)); 727 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", 728 gtk, gtk_len); 729 730 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) 731 return -1; 732 733 gd.keyidx = gtk[0] & 0x3; 734 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 735 !!(gtk[0] & BIT(2))); 736 gtk += 2; 737 gtk_len -= 2; 738 739 os_memcpy(gd.gtk, gtk, gtk_len); 740 gd.gtk_len = gtk_len; 741 742 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 743 gtk_len, gtk_len, 744 &gd.key_rsc_len, &gd.alg) || 745 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) { 746 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 747 "RSN: Failed to install GTK"); 748 return -1; 749 } 750 751 wpa_supplicant_key_neg_complete(sm, sm->bssid, 752 key_info & WPA_KEY_INFO_SECURE); 753 return 0; 754#else /* CONFIG_NO_WPA2 */ 755 return -1; 756#endif /* CONFIG_NO_WPA2 */ 757} 758 759 760static int ieee80211w_set_keys(struct wpa_sm *sm, 761 struct wpa_eapol_ie_parse *ie) 762{ 763#ifdef CONFIG_IEEE80211W 764 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) 765 return 0; 766 767 if (ie->igtk) { 768 const struct wpa_igtk_kde *igtk; 769 u16 keyidx; 770 if (ie->igtk_len != sizeof(*igtk)) 771 return -1; 772 igtk = (const struct wpa_igtk_kde *) ie->igtk; 773 keyidx = WPA_GET_LE16(igtk->keyid); 774 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " 775 "pn %02x%02x%02x%02x%02x%02x", 776 keyidx, MAC2STR(igtk->pn)); 777 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", 778 igtk->igtk, WPA_IGTK_LEN); 779 if (keyidx > 4095) { 780 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 781 "WPA: Invalid IGTK KeyID %d", keyidx); 782 return -1; 783 } 784 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, 785 keyidx, 0, igtk->pn, sizeof(igtk->pn), 786 igtk->igtk, WPA_IGTK_LEN) < 0) { 787 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 788 "WPA: Failed to configure IGTK to the driver"); 789 return -1; 790 } 791 } 792 793 return 0; 794#else /* CONFIG_IEEE80211W */ 795 return 0; 796#endif /* CONFIG_IEEE80211W */ 797} 798 799 800static void wpa_report_ie_mismatch(struct wpa_sm *sm, 801 const char *reason, const u8 *src_addr, 802 const u8 *wpa_ie, size_t wpa_ie_len, 803 const u8 *rsn_ie, size_t rsn_ie_len) 804{ 805 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", 806 reason, MAC2STR(src_addr)); 807 808 if (sm->ap_wpa_ie) { 809 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", 810 sm->ap_wpa_ie, sm->ap_wpa_ie_len); 811 } 812 if (wpa_ie) { 813 if (!sm->ap_wpa_ie) { 814 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 815 "WPA: No WPA IE in Beacon/ProbeResp"); 816 } 817 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", 818 wpa_ie, wpa_ie_len); 819 } 820 821 if (sm->ap_rsn_ie) { 822 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", 823 sm->ap_rsn_ie, sm->ap_rsn_ie_len); 824 } 825 if (rsn_ie) { 826 if (!sm->ap_rsn_ie) { 827 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 828 "WPA: No RSN IE in Beacon/ProbeResp"); 829 } 830 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", 831 rsn_ie, rsn_ie_len); 832 } 833 834 wpa_sm_disassociate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); 835} 836 837 838#ifdef CONFIG_IEEE80211R 839 840static int ft_validate_mdie(struct wpa_sm *sm, 841 const unsigned char *src_addr, 842 struct wpa_eapol_ie_parse *ie, 843 const u8 *assoc_resp_mdie) 844{ 845 struct rsn_mdie *mdie; 846 847 mdie = (struct rsn_mdie *) (ie->mdie + 2); 848 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || 849 os_memcmp(mdie->mobility_domain, sm->mobility_domain, 850 MOBILITY_DOMAIN_ID_LEN) != 0) { 851 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " 852 "not match with the current mobility domain"); 853 return -1; 854 } 855 856 if (assoc_resp_mdie && 857 (assoc_resp_mdie[1] != ie->mdie[1] || 858 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { 859 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); 860 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", 861 ie->mdie, 2 + ie->mdie[1]); 862 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", 863 assoc_resp_mdie, 2 + assoc_resp_mdie[1]); 864 return -1; 865 } 866 867 return 0; 868} 869 870 871static int ft_validate_ftie(struct wpa_sm *sm, 872 const unsigned char *src_addr, 873 struct wpa_eapol_ie_parse *ie, 874 const u8 *assoc_resp_ftie) 875{ 876 if (ie->ftie == NULL) { 877 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 878 "FT: No FTIE in EAPOL-Key msg 3/4"); 879 return -1; 880 } 881 882 if (assoc_resp_ftie == NULL) 883 return 0; 884 885 if (assoc_resp_ftie[1] != ie->ftie[1] || 886 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { 887 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); 888 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", 889 ie->ftie, 2 + ie->ftie[1]); 890 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", 891 assoc_resp_ftie, 2 + assoc_resp_ftie[1]); 892 return -1; 893 } 894 895 return 0; 896} 897 898 899static int ft_validate_rsnie(struct wpa_sm *sm, 900 const unsigned char *src_addr, 901 struct wpa_eapol_ie_parse *ie) 902{ 903 struct wpa_ie_data rsn; 904 905 if (!ie->rsn_ie) 906 return 0; 907 908 /* 909 * Verify that PMKR1Name from EAPOL-Key message 3/4 910 * matches with the value we derived. 911 */ 912 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || 913 rsn.num_pmkid != 1 || rsn.pmkid == NULL) { 914 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " 915 "FT 4-way handshake message 3/4"); 916 return -1; 917 } 918 919 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) { 920 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 921 "FT: PMKR1Name mismatch in " 922 "FT 4-way handshake message 3/4"); 923 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", 924 rsn.pmkid, WPA_PMK_NAME_LEN); 925 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", 926 sm->pmk_r1_name, WPA_PMK_NAME_LEN); 927 return -1; 928 } 929 930 return 0; 931} 932 933 934static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, 935 const unsigned char *src_addr, 936 struct wpa_eapol_ie_parse *ie) 937{ 938 const u8 *pos, *end, *mdie = NULL, *ftie = NULL; 939 940 if (sm->assoc_resp_ies) { 941 pos = sm->assoc_resp_ies; 942 end = pos + sm->assoc_resp_ies_len; 943 while (pos + 2 < end) { 944 if (pos + 2 + pos[1] > end) 945 break; 946 switch (*pos) { 947 case WLAN_EID_MOBILITY_DOMAIN: 948 mdie = pos; 949 break; 950 case WLAN_EID_FAST_BSS_TRANSITION: 951 ftie = pos; 952 break; 953 } 954 pos += 2 + pos[1]; 955 } 956 } 957 958 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || 959 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || 960 ft_validate_rsnie(sm, src_addr, ie) < 0) 961 return -1; 962 963 return 0; 964} 965 966#endif /* CONFIG_IEEE80211R */ 967 968 969static int wpa_supplicant_validate_ie(struct wpa_sm *sm, 970 const unsigned char *src_addr, 971 struct wpa_eapol_ie_parse *ie) 972{ 973 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { 974 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 975 "WPA: No WPA/RSN IE for this AP known. " 976 "Trying to get from scan results"); 977 if (wpa_sm_get_beacon_ie(sm) < 0) { 978 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 979 "WPA: Could not find AP from " 980 "the scan results"); 981 } else { 982 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, 983 "WPA: Found the current AP from " 984 "updated scan results"); 985 } 986 } 987 988 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && 989 (sm->ap_wpa_ie || sm->ap_rsn_ie)) { 990 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 991 "with IE in Beacon/ProbeResp (no IE?)", 992 src_addr, ie->wpa_ie, ie->wpa_ie_len, 993 ie->rsn_ie, ie->rsn_ie_len); 994 return -1; 995 } 996 997 if ((ie->wpa_ie && sm->ap_wpa_ie && 998 (ie->wpa_ie_len != sm->ap_wpa_ie_len || 999 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || 1000 (ie->rsn_ie && sm->ap_rsn_ie && 1001 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), 1002 sm->ap_rsn_ie, sm->ap_rsn_ie_len, 1003 ie->rsn_ie, ie->rsn_ie_len))) { 1004 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 1005 "with IE in Beacon/ProbeResp", 1006 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1007 ie->rsn_ie, ie->rsn_ie_len); 1008 return -1; 1009 } 1010 1011 if (sm->proto == WPA_PROTO_WPA && 1012 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { 1013 wpa_report_ie_mismatch(sm, "Possible downgrade attack " 1014 "detected - RSN was enabled and RSN IE " 1015 "was in msg 3/4, but not in " 1016 "Beacon/ProbeResp", 1017 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1018 ie->rsn_ie, ie->rsn_ie_len); 1019 return -1; 1020 } 1021 1022#ifdef CONFIG_IEEE80211R 1023 if (wpa_key_mgmt_ft(sm->key_mgmt) && 1024 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) 1025 return -1; 1026#endif /* CONFIG_IEEE80211R */ 1027 1028 return 0; 1029} 1030 1031 1032/** 1033 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake 1034 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1035 * @dst: Destination address for the frame 1036 * @key: Pointer to the EAPOL-Key frame header 1037 * @ver: Version bits from EAPOL-Key Key Info 1038 * @key_info: Key Info 1039 * @kde: KDEs to include the EAPOL-Key frame 1040 * @kde_len: Length of KDEs 1041 * @ptk: PTK to use for keyed hash and encryption 1042 * Returns: 0 on success, -1 on failure 1043 */ 1044int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 1045 const struct wpa_eapol_key *key, 1046 u16 ver, u16 key_info, 1047 const u8 *kde, size_t kde_len, 1048 struct wpa_ptk *ptk) 1049{ 1050 size_t rlen; 1051 struct wpa_eapol_key *reply; 1052 u8 *rbuf; 1053 1054 if (kde) 1055 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len); 1056 1057 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1058 sizeof(*reply) + kde_len, 1059 &rlen, (void *) &reply); 1060 if (rbuf == NULL) 1061 return -1; 1062 1063 reply->type = sm->proto == WPA_PROTO_RSN ? 1064 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1065 key_info &= WPA_KEY_INFO_SECURE; 1066 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC; 1067 WPA_PUT_BE16(reply->key_info, key_info); 1068 if (sm->proto == WPA_PROTO_RSN) 1069 WPA_PUT_BE16(reply->key_length, 0); 1070 else 1071 os_memcpy(reply->key_length, key->key_length, 2); 1072 os_memcpy(reply->replay_counter, key->replay_counter, 1073 WPA_REPLAY_COUNTER_LEN); 1074 1075 WPA_PUT_BE16(reply->key_data_length, kde_len); 1076 if (kde) 1077 os_memcpy(reply + 1, kde, kde_len); 1078 1079 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); 1080 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL, 1081 rbuf, rlen, reply->key_mic); 1082 1083 return 0; 1084} 1085 1086 1087static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, 1088 const struct wpa_eapol_key *key, 1089 u16 ver) 1090{ 1091 u16 key_info, keylen, len; 1092 const u8 *pos; 1093 struct wpa_eapol_ie_parse ie; 1094 1095 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 1096 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " 1097 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); 1098 1099 key_info = WPA_GET_BE16(key->key_info); 1100 1101 pos = (const u8 *) (key + 1); 1102 len = WPA_GET_BE16(key->key_data_length); 1103 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len); 1104 if (wpa_supplicant_parse_ies(pos, len, &ie) < 0) 1105 goto failed; 1106 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1107 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1108 "WPA: GTK IE in unencrypted key data"); 1109 goto failed; 1110 } 1111#ifdef CONFIG_IEEE80211W 1112 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1113 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1114 "WPA: IGTK KDE in unencrypted key data"); 1115 goto failed; 1116 } 1117 1118 if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) { 1119 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1120 "WPA: Invalid IGTK KDE length %lu", 1121 (unsigned long) ie.igtk_len); 1122 goto failed; 1123 } 1124#endif /* CONFIG_IEEE80211W */ 1125 1126 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1127 goto failed; 1128 1129 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1130 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1131 "WPA: ANonce from message 1 of 4-Way Handshake " 1132 "differs from 3 of 4-Way Handshake - drop packet (src=" 1133 MACSTR ")", MAC2STR(sm->bssid)); 1134 goto failed; 1135 } 1136 1137 keylen = WPA_GET_BE16(key->key_length); 1138 switch (sm->pairwise_cipher) { 1139 case WPA_CIPHER_CCMP: 1140 if (keylen != 16) { 1141 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1142 "WPA: Invalid CCMP key length %d (src=" MACSTR 1143 ")", keylen, MAC2STR(sm->bssid)); 1144 goto failed; 1145 } 1146 break; 1147 case WPA_CIPHER_GCMP: 1148 if (keylen != 16) { 1149 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1150 "WPA: Invalid GCMP key length %d (src=" MACSTR 1151 ")", keylen, MAC2STR(sm->bssid)); 1152 goto failed; 1153 } 1154 break; 1155 case WPA_CIPHER_TKIP: 1156 if (keylen != 32) { 1157 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1158 "WPA: Invalid TKIP key length %d (src=" MACSTR 1159 ")", keylen, MAC2STR(sm->bssid)); 1160 goto failed; 1161 } 1162 break; 1163 } 1164 1165 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1166 NULL, 0, &sm->ptk)) { 1167 goto failed; 1168 } 1169 1170 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1171 * for the next 4-Way Handshake. If msg 3 is received again, the old 1172 * SNonce will still be used to avoid changing PTK. */ 1173 sm->renew_snonce = 1; 1174 1175 if (key_info & WPA_KEY_INFO_INSTALL) { 1176 if (wpa_supplicant_install_ptk(sm, key)) 1177 goto failed; 1178 } 1179 1180 if (key_info & WPA_KEY_INFO_SECURE) { 1181 wpa_sm_mlme_setprotection( 1182 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1183 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1184 eapol_sm_notify_portValid(sm->eapol, TRUE); 1185 } 1186 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1187 1188 if (ie.gtk && 1189 wpa_supplicant_pairwise_gtk(sm, key, 1190 ie.gtk, ie.gtk_len, key_info) < 0) { 1191 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1192 "RSN: Failed to configure GTK"); 1193 goto failed; 1194 } 1195 1196 if (ieee80211w_set_keys(sm, &ie) < 0) { 1197 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1198 "RSN: Failed to configure IGTK"); 1199 goto failed; 1200 } 1201 1202 wpa_sm_set_rekey_offload(sm); 1203 1204 return; 1205 1206failed: 1207 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1208} 1209 1210 1211static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1212 const u8 *keydata, 1213 size_t keydatalen, 1214 u16 key_info, 1215 struct wpa_gtk_data *gd) 1216{ 1217 int maxkeylen; 1218 struct wpa_eapol_ie_parse ie; 1219 1220 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen); 1221 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1222 return -1; 1223 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1224 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1225 "WPA: GTK IE in unencrypted key data"); 1226 return -1; 1227 } 1228 if (ie.gtk == NULL) { 1229 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1230 "WPA: No GTK IE in Group Key msg 1/2"); 1231 return -1; 1232 } 1233 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1234 1235 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1236 gd->gtk_len, maxkeylen, 1237 &gd->key_rsc_len, &gd->alg)) 1238 return -1; 1239 1240 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake", 1241 ie.gtk, ie.gtk_len); 1242 gd->keyidx = ie.gtk[0] & 0x3; 1243 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1244 !!(ie.gtk[0] & BIT(2))); 1245 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1246 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1247 "RSN: Too long GTK in GTK IE (len=%lu)", 1248 (unsigned long) ie.gtk_len - 2); 1249 return -1; 1250 } 1251 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1252 1253 if (ieee80211w_set_keys(sm, &ie) < 0) 1254 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1255 "RSN: Failed to configure IGTK"); 1256 1257 return 0; 1258} 1259 1260 1261static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1262 const struct wpa_eapol_key *key, 1263 size_t keydatalen, int key_info, 1264 size_t extra_len, u16 ver, 1265 struct wpa_gtk_data *gd) 1266{ 1267 size_t maxkeylen; 1268 u8 ek[32]; 1269 1270 gd->gtk_len = WPA_GET_BE16(key->key_length); 1271 maxkeylen = keydatalen; 1272 if (keydatalen > extra_len) { 1273 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1274 "WPA: Truncated EAPOL-Key packet: " 1275 "key_data_length=%lu > extra_len=%lu", 1276 (unsigned long) keydatalen, (unsigned long) extra_len); 1277 return -1; 1278 } 1279 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1280 if (maxkeylen < 8) { 1281 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1282 "WPA: Too short maxkeylen (%lu)", 1283 (unsigned long) maxkeylen); 1284 return -1; 1285 } 1286 maxkeylen -= 8; 1287 } 1288 1289 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1290 gd->gtk_len, maxkeylen, 1291 &gd->key_rsc_len, &gd->alg)) 1292 return -1; 1293 1294 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1295 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1296 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1297 os_memcpy(ek, key->key_iv, 16); 1298 os_memcpy(ek + 16, sm->ptk.kek, 16); 1299 if (keydatalen > sizeof(gd->gtk)) { 1300 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1301 "WPA: RC4 key data too long (%lu)", 1302 (unsigned long) keydatalen); 1303 return -1; 1304 } 1305 os_memcpy(gd->gtk, key + 1, keydatalen); 1306 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) { 1307 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1308 "WPA: RC4 failed"); 1309 return -1; 1310 } 1311 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1312 if (keydatalen % 8) { 1313 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1314 "WPA: Unsupported AES-WRAP len %lu", 1315 (unsigned long) keydatalen); 1316 return -1; 1317 } 1318 if (maxkeylen > sizeof(gd->gtk)) { 1319 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1320 "WPA: AES-WRAP key data " 1321 "too long (keydatalen=%lu maxkeylen=%lu)", 1322 (unsigned long) keydatalen, 1323 (unsigned long) maxkeylen); 1324 return -1; 1325 } 1326 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8, 1327 (const u8 *) (key + 1), gd->gtk)) { 1328 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1329 "WPA: AES unwrap failed - could not decrypt " 1330 "GTK"); 1331 return -1; 1332 } 1333 } else { 1334 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1335 "WPA: Unsupported key_info type %d", ver); 1336 return -1; 1337 } 1338 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1339 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1340 return 0; 1341} 1342 1343 1344static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1345 const struct wpa_eapol_key *key, 1346 int ver, u16 key_info) 1347{ 1348 size_t rlen; 1349 struct wpa_eapol_key *reply; 1350 u8 *rbuf; 1351 1352 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1353 sizeof(*reply), &rlen, (void *) &reply); 1354 if (rbuf == NULL) 1355 return -1; 1356 1357 reply->type = sm->proto == WPA_PROTO_RSN ? 1358 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1359 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1360 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE; 1361 WPA_PUT_BE16(reply->key_info, key_info); 1362 if (sm->proto == WPA_PROTO_RSN) 1363 WPA_PUT_BE16(reply->key_length, 0); 1364 else 1365 os_memcpy(reply->key_length, key->key_length, 2); 1366 os_memcpy(reply->replay_counter, key->replay_counter, 1367 WPA_REPLAY_COUNTER_LEN); 1368 1369 WPA_PUT_BE16(reply->key_data_length, 0); 1370 1371 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1372 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL, 1373 rbuf, rlen, reply->key_mic); 1374 1375 return 0; 1376} 1377 1378 1379static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1380 const unsigned char *src_addr, 1381 const struct wpa_eapol_key *key, 1382 int extra_len, u16 ver) 1383{ 1384 u16 key_info, keydatalen; 1385 int rekey, ret; 1386 struct wpa_gtk_data gd; 1387 1388 os_memset(&gd, 0, sizeof(gd)); 1389 1390 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1391 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1392 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1393 1394 key_info = WPA_GET_BE16(key->key_info); 1395 keydatalen = WPA_GET_BE16(key->key_data_length); 1396 1397 if (sm->proto == WPA_PROTO_RSN) { 1398 ret = wpa_supplicant_process_1_of_2_rsn(sm, 1399 (const u8 *) (key + 1), 1400 keydatalen, key_info, 1401 &gd); 1402 } else { 1403 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, 1404 key_info, extra_len, 1405 ver, &gd); 1406 } 1407 1408 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1409 1410 if (ret) 1411 goto failed; 1412 1413 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) || 1414 wpa_supplicant_send_2_of_2(sm, key, ver, key_info)) 1415 goto failed; 1416 1417 if (rekey) { 1418 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " 1419 "completed with " MACSTR " [GTK=%s]", 1420 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1421 wpa_sm_cancel_auth_timeout(sm); 1422 wpa_sm_set_state(sm, WPA_COMPLETED); 1423 1424 wpa_sm_set_rekey_offload(sm); 1425 } else { 1426 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1427 key_info & 1428 WPA_KEY_INFO_SECURE); 1429 } 1430 return; 1431 1432failed: 1433 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1434} 1435 1436 1437static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1438 struct wpa_eapol_key *key, 1439 u16 ver, 1440 const u8 *buf, size_t len) 1441{ 1442 u8 mic[16]; 1443 int ok = 0; 1444 1445 os_memcpy(mic, key->key_mic, 16); 1446 if (sm->tptk_set) { 1447 os_memset(key->key_mic, 0, 16); 1448 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len, 1449 key->key_mic); 1450 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1451 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1452 "WPA: Invalid EAPOL-Key MIC " 1453 "when using TPTK - ignoring TPTK"); 1454 } else { 1455 ok = 1; 1456 sm->tptk_set = 0; 1457 sm->ptk_set = 1; 1458 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1459 } 1460 } 1461 1462 if (!ok && sm->ptk_set) { 1463 os_memset(key->key_mic, 0, 16); 1464 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len, 1465 key->key_mic); 1466 if (os_memcmp(mic, key->key_mic, 16) != 0) { 1467 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1468 "WPA: Invalid EAPOL-Key MIC - " 1469 "dropping packet"); 1470 return -1; 1471 } 1472 ok = 1; 1473 } 1474 1475 if (!ok) { 1476 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1477 "WPA: Could not verify EAPOL-Key MIC - " 1478 "dropping packet"); 1479 return -1; 1480 } 1481 1482 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1483 WPA_REPLAY_COUNTER_LEN); 1484 sm->rx_replay_counter_set = 1; 1485 return 0; 1486} 1487 1488 1489/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ 1490static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, 1491 struct wpa_eapol_key *key, u16 ver) 1492{ 1493 u16 keydatalen = WPA_GET_BE16(key->key_data_length); 1494 1495 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", 1496 (u8 *) (key + 1), keydatalen); 1497 if (!sm->ptk_set) { 1498 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1499 "WPA: PTK not available, cannot decrypt EAPOL-Key Key " 1500 "Data"); 1501 return -1; 1502 } 1503 1504 /* Decrypt key data here so that this operation does not need 1505 * to be implemented separately for each message type. */ 1506 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) { 1507 u8 ek[32]; 1508 os_memcpy(ek, key->key_iv, 16); 1509 os_memcpy(ek + 16, sm->ptk.kek, 16); 1510 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) { 1511 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1512 "WPA: RC4 failed"); 1513 return -1; 1514 } 1515 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1516 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1517 u8 *buf; 1518 if (keydatalen % 8) { 1519 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1520 "WPA: Unsupported AES-WRAP len %d", 1521 keydatalen); 1522 return -1; 1523 } 1524 keydatalen -= 8; /* AES-WRAP adds 8 bytes */ 1525 buf = os_malloc(keydatalen); 1526 if (buf == NULL) { 1527 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1528 "WPA: No memory for AES-UNWRAP buffer"); 1529 return -1; 1530 } 1531 if (aes_unwrap(sm->ptk.kek, keydatalen / 8, 1532 (u8 *) (key + 1), buf)) { 1533 os_free(buf); 1534 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1535 "WPA: AES unwrap failed - " 1536 "could not decrypt EAPOL-Key key data"); 1537 return -1; 1538 } 1539 os_memcpy(key + 1, buf, keydatalen); 1540 os_free(buf); 1541 WPA_PUT_BE16(key->key_data_length, keydatalen); 1542 } else { 1543 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1544 "WPA: Unsupported key_info type %d", ver); 1545 return -1; 1546 } 1547 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 1548 (u8 *) (key + 1), keydatalen); 1549 return 0; 1550} 1551 1552 1553/** 1554 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 1555 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1556 */ 1557void wpa_sm_aborted_cached(struct wpa_sm *sm) 1558{ 1559 if (sm && sm->cur_pmksa) { 1560 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1561 "RSN: Cancelling PMKSA caching attempt"); 1562 sm->cur_pmksa = NULL; 1563 } 1564} 1565 1566 1567static void wpa_eapol_key_dump(struct wpa_sm *sm, 1568 const struct wpa_eapol_key *key) 1569{ 1570#ifndef CONFIG_NO_STDOUT_DEBUG 1571 u16 key_info = WPA_GET_BE16(key->key_info); 1572 1573 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 1574 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1575 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 1576 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 1577 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1578 WPA_KEY_INFO_KEY_INDEX_SHIFT, 1579 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 1580 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 1581 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 1582 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 1583 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 1584 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 1585 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 1586 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 1587 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 1588 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1589 " key_length=%u key_data_length=%u", 1590 WPA_GET_BE16(key->key_length), 1591 WPA_GET_BE16(key->key_data_length)); 1592 wpa_hexdump(MSG_DEBUG, " replay_counter", 1593 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 1594 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 1595 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 1596 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 1597 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 1598 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16); 1599#endif /* CONFIG_NO_STDOUT_DEBUG */ 1600} 1601 1602 1603/** 1604 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 1605 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1606 * @src_addr: Source MAC address of the EAPOL packet 1607 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 1608 * @len: Length of the EAPOL frame 1609 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 1610 * 1611 * This function is called for each received EAPOL frame. Other than EAPOL-Key 1612 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 1613 * only processing WPA and WPA2 EAPOL-Key frames. 1614 * 1615 * The received EAPOL-Key packets are validated and valid packets are replied 1616 * to. In addition, key material (PTK, GTK) is configured at the end of a 1617 * successful key handshake. 1618 */ 1619int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 1620 const u8 *buf, size_t len) 1621{ 1622 size_t plen, data_len, extra_len; 1623 struct ieee802_1x_hdr *hdr; 1624 struct wpa_eapol_key *key; 1625 u16 key_info, ver; 1626 u8 *tmp; 1627 int ret = -1; 1628 struct wpa_peerkey *peerkey = NULL; 1629 1630#ifdef CONFIG_IEEE80211R 1631 sm->ft_completed = 0; 1632#endif /* CONFIG_IEEE80211R */ 1633 1634 if (len < sizeof(*hdr) + sizeof(*key)) { 1635 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1636 "WPA: EAPOL frame too short to be a WPA " 1637 "EAPOL-Key (len %lu, expecting at least %lu)", 1638 (unsigned long) len, 1639 (unsigned long) sizeof(*hdr) + sizeof(*key)); 1640 return 0; 1641 } 1642 1643 tmp = os_malloc(len); 1644 if (tmp == NULL) 1645 return -1; 1646 os_memcpy(tmp, buf, len); 1647 1648 hdr = (struct ieee802_1x_hdr *) tmp; 1649 key = (struct wpa_eapol_key *) (hdr + 1); 1650 plen = be_to_host16(hdr->length); 1651 data_len = plen + sizeof(*hdr); 1652 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1653 "IEEE 802.1X RX: version=%d type=%d length=%lu", 1654 hdr->version, hdr->type, (unsigned long) plen); 1655 1656 if (hdr->version < EAPOL_VERSION) { 1657 /* TODO: backwards compatibility */ 1658 } 1659 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 1660 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1661 "WPA: EAPOL frame (type %u) discarded, " 1662 "not a Key frame", hdr->type); 1663 ret = 0; 1664 goto out; 1665 } 1666 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) { 1667 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1668 "WPA: EAPOL frame payload size %lu " 1669 "invalid (frame size %lu)", 1670 (unsigned long) plen, (unsigned long) len); 1671 ret = 0; 1672 goto out; 1673 } 1674 1675 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) 1676 { 1677 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1678 "WPA: EAPOL-Key type (%d) unknown, discarded", 1679 key->type); 1680 ret = 0; 1681 goto out; 1682 } 1683 wpa_eapol_key_dump(sm, key); 1684 1685 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 1686 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len); 1687 if (data_len < len) { 1688 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1689 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 1690 (unsigned long) len - data_len); 1691 } 1692 key_info = WPA_GET_BE16(key->key_info); 1693 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 1694 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 1695#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 1696 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 1697#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 1698 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1699 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1700 "WPA: Unsupported EAPOL-Key descriptor version %d", 1701 ver); 1702 goto out; 1703 } 1704 1705#ifdef CONFIG_IEEE80211R 1706 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 1707 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 1708 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1709 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1710 "FT: AP did not use AES-128-CMAC"); 1711 goto out; 1712 } 1713 } else 1714#endif /* CONFIG_IEEE80211R */ 1715#ifdef CONFIG_IEEE80211W 1716 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 1717 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 1718 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1719 "WPA: AP did not use the " 1720 "negotiated AES-128-CMAC"); 1721 goto out; 1722 } 1723 } else 1724#endif /* CONFIG_IEEE80211W */ 1725 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 1726 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1727 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1728 "WPA: CCMP is used, but EAPOL-Key " 1729 "descriptor version (%d) is not 2", ver); 1730 if (sm->group_cipher != WPA_CIPHER_CCMP && 1731 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 1732 /* Earlier versions of IEEE 802.11i did not explicitly 1733 * require version 2 descriptor for all EAPOL-Key 1734 * packets, so allow group keys to use version 1 if 1735 * CCMP is not used for them. */ 1736 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1737 "WPA: Backwards compatibility: allow invalid " 1738 "version for non-CCMP group keys"); 1739 } else 1740 goto out; 1741 } 1742 if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 1743 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1744 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1745 "WPA: GCMP is used, but EAPOL-Key " 1746 "descriptor version (%d) is not 2", ver); 1747 goto out; 1748 } 1749 1750#ifdef CONFIG_PEERKEY 1751 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 1752 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 1753 break; 1754 } 1755 1756 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { 1757 if (!peerkey->initiator && peerkey->replay_counter_set && 1758 os_memcmp(key->replay_counter, peerkey->replay_counter, 1759 WPA_REPLAY_COUNTER_LEN) <= 0) { 1760 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1761 "RSN: EAPOL-Key Replay Counter did not " 1762 "increase (STK) - dropping packet"); 1763 goto out; 1764 } else if (peerkey->initiator) { 1765 u8 _tmp[WPA_REPLAY_COUNTER_LEN]; 1766 os_memcpy(_tmp, key->replay_counter, 1767 WPA_REPLAY_COUNTER_LEN); 1768 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); 1769 if (os_memcmp(_tmp, peerkey->replay_counter, 1770 WPA_REPLAY_COUNTER_LEN) != 0) { 1771 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1772 "RSN: EAPOL-Key Replay " 1773 "Counter did not match (STK) - " 1774 "dropping packet"); 1775 goto out; 1776 } 1777 } 1778 } 1779 1780 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { 1781 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1782 "RSN: Ack bit in key_info from STK peer"); 1783 goto out; 1784 } 1785#endif /* CONFIG_PEERKEY */ 1786 1787 if (!peerkey && sm->rx_replay_counter_set && 1788 os_memcmp(key->replay_counter, sm->rx_replay_counter, 1789 WPA_REPLAY_COUNTER_LEN) <= 0) { 1790 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1791 "WPA: EAPOL-Key Replay Counter did not increase - " 1792 "dropping packet"); 1793 goto out; 1794 } 1795 1796 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) 1797#ifdef CONFIG_PEERKEY 1798 && (peerkey == NULL || !peerkey->initiator) 1799#endif /* CONFIG_PEERKEY */ 1800 ) { 1801 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1802 "WPA: No Ack bit in key_info"); 1803 goto out; 1804 } 1805 1806 if (key_info & WPA_KEY_INFO_REQUEST) { 1807 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1808 "WPA: EAPOL-Key with Request bit - dropped"); 1809 goto out; 1810 } 1811 1812 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && 1813 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 1814 goto out; 1815 1816#ifdef CONFIG_PEERKEY 1817 if ((key_info & WPA_KEY_INFO_MIC) && peerkey && 1818 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len)) 1819 goto out; 1820#endif /* CONFIG_PEERKEY */ 1821 1822 extra_len = data_len - sizeof(*hdr) - sizeof(*key); 1823 1824 if (WPA_GET_BE16(key->key_data_length) > extra_len) { 1825 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 1826 "frame - key_data overflow (%d > %lu)", 1827 WPA_GET_BE16(key->key_data_length), 1828 (unsigned long) extra_len); 1829 goto out; 1830 } 1831 extra_len = WPA_GET_BE16(key->key_data_length); 1832 1833 if (sm->proto == WPA_PROTO_RSN && 1834 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1835 if (wpa_supplicant_decrypt_key_data(sm, key, ver)) 1836 goto out; 1837 extra_len = WPA_GET_BE16(key->key_data_length); 1838 } 1839 1840 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 1841 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 1842 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1843 "WPA: Ignored EAPOL-Key (Pairwise) with " 1844 "non-zero key index"); 1845 goto out; 1846 } 1847 if (peerkey) { 1848 /* PeerKey 4-Way Handshake */ 1849 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver); 1850 } else if (key_info & WPA_KEY_INFO_MIC) { 1851 /* 3/4 4-Way Handshake */ 1852 wpa_supplicant_process_3_of_4(sm, key, ver); 1853 } else { 1854 /* 1/4 4-Way Handshake */ 1855 wpa_supplicant_process_1_of_4(sm, src_addr, key, 1856 ver); 1857 } 1858 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 1859 /* PeerKey SMK Handshake */ 1860 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info, 1861 ver); 1862 } else { 1863 if (key_info & WPA_KEY_INFO_MIC) { 1864 /* 1/2 Group Key Handshake */ 1865 wpa_supplicant_process_1_of_2(sm, src_addr, key, 1866 extra_len, ver); 1867 } else { 1868 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1869 "WPA: EAPOL-Key (Group) without Mic bit - " 1870 "dropped"); 1871 } 1872 } 1873 1874 ret = 1; 1875 1876out: 1877 os_free(tmp); 1878 return ret; 1879} 1880 1881 1882#ifdef CONFIG_CTRL_IFACE 1883static int wpa_cipher_bits(int cipher) 1884{ 1885 switch (cipher) { 1886 case WPA_CIPHER_CCMP: 1887 return 128; 1888 case WPA_CIPHER_GCMP: 1889 return 128; 1890 case WPA_CIPHER_TKIP: 1891 return 256; 1892 case WPA_CIPHER_WEP104: 1893 return 104; 1894 case WPA_CIPHER_WEP40: 1895 return 40; 1896 default: 1897 return 0; 1898 } 1899} 1900 1901 1902static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 1903{ 1904 switch (sm->key_mgmt) { 1905 case WPA_KEY_MGMT_IEEE8021X: 1906 return (sm->proto == WPA_PROTO_RSN ? 1907 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 1908 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 1909 case WPA_KEY_MGMT_PSK: 1910 return (sm->proto == WPA_PROTO_RSN ? 1911 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 1912 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 1913#ifdef CONFIG_IEEE80211R 1914 case WPA_KEY_MGMT_FT_IEEE8021X: 1915 return RSN_AUTH_KEY_MGMT_FT_802_1X; 1916 case WPA_KEY_MGMT_FT_PSK: 1917 return RSN_AUTH_KEY_MGMT_FT_PSK; 1918#endif /* CONFIG_IEEE80211R */ 1919#ifdef CONFIG_IEEE80211W 1920 case WPA_KEY_MGMT_IEEE8021X_SHA256: 1921 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 1922 case WPA_KEY_MGMT_PSK_SHA256: 1923 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 1924#endif /* CONFIG_IEEE80211W */ 1925 case WPA_KEY_MGMT_WPA_NONE: 1926 return WPA_AUTH_KEY_MGMT_NONE; 1927 default: 1928 return 0; 1929 } 1930} 1931 1932 1933static u32 wpa_cipher_suite(struct wpa_sm *sm, int cipher) 1934{ 1935 switch (cipher) { 1936 case WPA_CIPHER_CCMP: 1937 return (sm->proto == WPA_PROTO_RSN ? 1938 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP); 1939 case WPA_CIPHER_GCMP: 1940 return RSN_CIPHER_SUITE_GCMP; 1941 case WPA_CIPHER_TKIP: 1942 return (sm->proto == WPA_PROTO_RSN ? 1943 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP); 1944 case WPA_CIPHER_WEP104: 1945 return (sm->proto == WPA_PROTO_RSN ? 1946 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104); 1947 case WPA_CIPHER_WEP40: 1948 return (sm->proto == WPA_PROTO_RSN ? 1949 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40); 1950 case WPA_CIPHER_NONE: 1951 return (sm->proto == WPA_PROTO_RSN ? 1952 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE); 1953 default: 1954 return 0; 1955 } 1956} 1957 1958 1959#define RSN_SUITE "%02x-%02x-%02x-%d" 1960#define RSN_SUITE_ARG(s) \ 1961((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 1962 1963/** 1964 * wpa_sm_get_mib - Dump text list of MIB entries 1965 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1966 * @buf: Buffer for the list 1967 * @buflen: Length of the buffer 1968 * Returns: Number of bytes written to buffer 1969 * 1970 * This function is used fetch dot11 MIB variables. 1971 */ 1972int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 1973{ 1974 char pmkid_txt[PMKID_LEN * 2 + 1]; 1975 int rsna, ret; 1976 size_t len; 1977 1978 if (sm->cur_pmksa) { 1979 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 1980 sm->cur_pmksa->pmkid, PMKID_LEN); 1981 } else 1982 pmkid_txt[0] = '\0'; 1983 1984 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 1985 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 1986 sm->proto == WPA_PROTO_RSN) 1987 rsna = 1; 1988 else 1989 rsna = 0; 1990 1991 ret = os_snprintf(buf, buflen, 1992 "dot11RSNAOptionImplemented=TRUE\n" 1993 "dot11RSNAPreauthenticationImplemented=TRUE\n" 1994 "dot11RSNAEnabled=%s\n" 1995 "dot11RSNAPreauthenticationEnabled=%s\n" 1996 "dot11RSNAConfigVersion=%d\n" 1997 "dot11RSNAConfigPairwiseKeysSupported=5\n" 1998 "dot11RSNAConfigGroupCipherSize=%d\n" 1999 "dot11RSNAConfigPMKLifetime=%d\n" 2000 "dot11RSNAConfigPMKReauthThreshold=%d\n" 2001 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 2002 "dot11RSNAConfigSATimeout=%d\n", 2003 rsna ? "TRUE" : "FALSE", 2004 rsna ? "TRUE" : "FALSE", 2005 RSN_VERSION, 2006 wpa_cipher_bits(sm->group_cipher), 2007 sm->dot11RSNAConfigPMKLifetime, 2008 sm->dot11RSNAConfigPMKReauthThreshold, 2009 sm->dot11RSNAConfigSATimeout); 2010 if (ret < 0 || (size_t) ret >= buflen) 2011 return 0; 2012 len = ret; 2013 2014 ret = os_snprintf( 2015 buf + len, buflen - len, 2016 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 2017 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 2018 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 2019 "dot11RSNAPMKIDUsed=%s\n" 2020 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 2021 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 2022 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 2023 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 2024 "dot11RSNA4WayHandshakeFailures=%u\n", 2025 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 2026 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)), 2027 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)), 2028 pmkid_txt, 2029 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 2030 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)), 2031 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)), 2032 sm->dot11RSNA4WayHandshakeFailures); 2033 if (ret >= 0 && (size_t) ret < buflen) 2034 len += ret; 2035 2036 return (int) len; 2037} 2038#endif /* CONFIG_CTRL_IFACE */ 2039 2040 2041static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 2042 void *ctx, int replace) 2043{ 2044 struct wpa_sm *sm = ctx; 2045 2046 if (sm->cur_pmksa == entry || 2047 (sm->pmk_len == entry->pmk_len && 2048 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2049 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2050 "RSN: removed current PMKSA entry"); 2051 sm->cur_pmksa = NULL; 2052 2053 if (replace) { 2054 /* A new entry is being added, so no need to 2055 * deauthenticate in this case. This happens when EAP 2056 * authentication is completed again (reauth or failed 2057 * PMKSA caching attempt). */ 2058 return; 2059 } 2060 2061 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2062 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2063 } 2064} 2065 2066 2067/** 2068 * wpa_sm_init - Initialize WPA state machine 2069 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2070 * Returns: Pointer to the allocated WPA state machine data 2071 * 2072 * This function is used to allocate a new WPA state machine and the returned 2073 * value is passed to all WPA state machine calls. 2074 */ 2075struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2076{ 2077 struct wpa_sm *sm; 2078 2079 sm = os_zalloc(sizeof(*sm)); 2080 if (sm == NULL) 2081 return NULL; 2082 dl_list_init(&sm->pmksa_candidates); 2083 sm->renew_snonce = 1; 2084 sm->ctx = ctx; 2085 2086 sm->dot11RSNAConfigPMKLifetime = 43200; 2087 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2088 sm->dot11RSNAConfigSATimeout = 60; 2089 2090 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2091 if (sm->pmksa == NULL) { 2092 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2093 "RSN: PMKSA cache initialization failed"); 2094 os_free(sm); 2095 return NULL; 2096 } 2097 2098 return sm; 2099} 2100 2101 2102/** 2103 * wpa_sm_deinit - Deinitialize WPA state machine 2104 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2105 */ 2106void wpa_sm_deinit(struct wpa_sm *sm) 2107{ 2108 if (sm == NULL) 2109 return; 2110 pmksa_cache_deinit(sm->pmksa); 2111 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2112 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2113 os_free(sm->assoc_wpa_ie); 2114 os_free(sm->ap_wpa_ie); 2115 os_free(sm->ap_rsn_ie); 2116 os_free(sm->ctx); 2117 peerkey_deinit(sm); 2118#ifdef CONFIG_IEEE80211R 2119 os_free(sm->assoc_resp_ies); 2120#endif /* CONFIG_IEEE80211R */ 2121 os_free(sm); 2122} 2123 2124 2125/** 2126 * wpa_sm_notify_assoc - Notify WPA state machine about association 2127 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2128 * @bssid: The BSSID of the new association 2129 * 2130 * This function is called to let WPA state machine know that the connection 2131 * was established. 2132 */ 2133void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2134{ 2135 int clear_ptk = 1; 2136 2137 if (sm == NULL) 2138 return; 2139 2140 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2141 "WPA: Association event - clear replay counter"); 2142 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2143 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2144 sm->rx_replay_counter_set = 0; 2145 sm->renew_snonce = 1; 2146 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2147 rsn_preauth_deinit(sm); 2148 2149#ifdef CONFIG_IEEE80211R 2150 if (wpa_ft_is_completed(sm)) { 2151 /* 2152 * Clear portValid to kick EAPOL state machine to re-enter 2153 * AUTHENTICATED state to get the EAPOL port Authorized. 2154 */ 2155 eapol_sm_notify_portValid(sm->eapol, FALSE); 2156 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2157 2158 /* Prepare for the next transition */ 2159 wpa_ft_prepare_auth_request(sm, NULL); 2160 2161 clear_ptk = 0; 2162 } 2163#endif /* CONFIG_IEEE80211R */ 2164 2165 if (clear_ptk) { 2166 /* 2167 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2168 * this is not part of a Fast BSS Transition. 2169 */ 2170 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2171 sm->ptk_set = 0; 2172 sm->tptk_set = 0; 2173 } 2174 2175#ifdef CONFIG_TDLS 2176 wpa_tdls_assoc(sm); 2177#endif /* CONFIG_TDLS */ 2178} 2179 2180 2181/** 2182 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2183 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2184 * 2185 * This function is called to let WPA state machine know that the connection 2186 * was lost. This will abort any existing pre-authentication session. 2187 */ 2188void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2189{ 2190 rsn_preauth_deinit(sm); 2191 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2192 sm->dot11RSNA4WayHandshakeFailures++; 2193#ifdef CONFIG_TDLS 2194 wpa_tdls_disassoc(sm); 2195#endif /* CONFIG_TDLS */ 2196} 2197 2198 2199/** 2200 * wpa_sm_set_pmk - Set PMK 2201 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2202 * @pmk: The new PMK 2203 * @pmk_len: The length of the new PMK in bytes 2204 * 2205 * Configure the PMK for WPA state machine. 2206 */ 2207void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len) 2208{ 2209 if (sm == NULL) 2210 return; 2211 2212 sm->pmk_len = pmk_len; 2213 os_memcpy(sm->pmk, pmk, pmk_len); 2214 2215#ifdef CONFIG_IEEE80211R 2216 /* Set XXKey to be PSK for FT key derivation */ 2217 sm->xxkey_len = pmk_len; 2218 os_memcpy(sm->xxkey, pmk, pmk_len); 2219#endif /* CONFIG_IEEE80211R */ 2220} 2221 2222 2223/** 2224 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2225 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2226 * 2227 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2228 * will be cleared. 2229 */ 2230void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2231{ 2232 if (sm == NULL) 2233 return; 2234 2235 if (sm->cur_pmksa) { 2236 sm->pmk_len = sm->cur_pmksa->pmk_len; 2237 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2238 } else { 2239 sm->pmk_len = PMK_LEN; 2240 os_memset(sm->pmk, 0, PMK_LEN); 2241 } 2242} 2243 2244 2245/** 2246 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2247 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2248 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2249 */ 2250void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2251{ 2252 if (sm) 2253 sm->fast_reauth = fast_reauth; 2254} 2255 2256 2257/** 2258 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2259 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2260 * @scard_ctx: Context pointer for smartcard related callback functions 2261 */ 2262void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2263{ 2264 if (sm == NULL) 2265 return; 2266 sm->scard_ctx = scard_ctx; 2267 if (sm->preauth_eapol) 2268 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2269} 2270 2271 2272/** 2273 * wpa_sm_set_config - Notification of current configration change 2274 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2275 * @config: Pointer to current network configuration 2276 * 2277 * Notify WPA state machine that configuration has changed. config will be 2278 * stored as a backpointer to network configuration. This can be %NULL to clear 2279 * the stored pointed. 2280 */ 2281void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2282{ 2283 if (!sm) 2284 return; 2285 2286 if (config) { 2287 sm->network_ctx = config->network_ctx; 2288 sm->peerkey_enabled = config->peerkey_enabled; 2289 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2290 sm->proactive_key_caching = config->proactive_key_caching; 2291 sm->eap_workaround = config->eap_workaround; 2292 sm->eap_conf_ctx = config->eap_conf_ctx; 2293 if (config->ssid) { 2294 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2295 sm->ssid_len = config->ssid_len; 2296 } else 2297 sm->ssid_len = 0; 2298 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2299 } else { 2300 sm->network_ctx = NULL; 2301 sm->peerkey_enabled = 0; 2302 sm->allowed_pairwise_cipher = 0; 2303 sm->proactive_key_caching = 0; 2304 sm->eap_workaround = 0; 2305 sm->eap_conf_ctx = NULL; 2306 sm->ssid_len = 0; 2307 sm->wpa_ptk_rekey = 0; 2308 } 2309} 2310 2311 2312/** 2313 * wpa_sm_set_own_addr - Set own MAC address 2314 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2315 * @addr: Own MAC address 2316 */ 2317void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2318{ 2319 if (sm) 2320 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2321} 2322 2323 2324/** 2325 * wpa_sm_set_ifname - Set network interface name 2326 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2327 * @ifname: Interface name 2328 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2329 */ 2330void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2331 const char *bridge_ifname) 2332{ 2333 if (sm) { 2334 sm->ifname = ifname; 2335 sm->bridge_ifname = bridge_ifname; 2336 } 2337} 2338 2339 2340/** 2341 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2342 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2343 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2344 */ 2345void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2346{ 2347 if (sm) 2348 sm->eapol = eapol; 2349} 2350 2351 2352/** 2353 * wpa_sm_set_param - Set WPA state machine parameters 2354 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2355 * @param: Parameter field 2356 * @value: Parameter value 2357 * Returns: 0 on success, -1 on failure 2358 */ 2359int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2360 unsigned int value) 2361{ 2362 int ret = 0; 2363 2364 if (sm == NULL) 2365 return -1; 2366 2367 switch (param) { 2368 case RSNA_PMK_LIFETIME: 2369 if (value > 0) 2370 sm->dot11RSNAConfigPMKLifetime = value; 2371 else 2372 ret = -1; 2373 break; 2374 case RSNA_PMK_REAUTH_THRESHOLD: 2375 if (value > 0 && value <= 100) 2376 sm->dot11RSNAConfigPMKReauthThreshold = value; 2377 else 2378 ret = -1; 2379 break; 2380 case RSNA_SA_TIMEOUT: 2381 if (value > 0) 2382 sm->dot11RSNAConfigSATimeout = value; 2383 else 2384 ret = -1; 2385 break; 2386 case WPA_PARAM_PROTO: 2387 sm->proto = value; 2388 break; 2389 case WPA_PARAM_PAIRWISE: 2390 sm->pairwise_cipher = value; 2391 break; 2392 case WPA_PARAM_GROUP: 2393 sm->group_cipher = value; 2394 break; 2395 case WPA_PARAM_KEY_MGMT: 2396 sm->key_mgmt = value; 2397 break; 2398#ifdef CONFIG_IEEE80211W 2399 case WPA_PARAM_MGMT_GROUP: 2400 sm->mgmt_group_cipher = value; 2401 break; 2402#endif /* CONFIG_IEEE80211W */ 2403 case WPA_PARAM_RSN_ENABLED: 2404 sm->rsn_enabled = value; 2405 break; 2406 case WPA_PARAM_MFP: 2407 sm->mfp = value; 2408 break; 2409 default: 2410 break; 2411 } 2412 2413 return ret; 2414} 2415 2416 2417/** 2418 * wpa_sm_get_param - Get WPA state machine parameters 2419 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2420 * @param: Parameter field 2421 * Returns: Parameter value 2422 */ 2423unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param) 2424{ 2425 if (sm == NULL) 2426 return 0; 2427 2428 switch (param) { 2429 case RSNA_PMK_LIFETIME: 2430 return sm->dot11RSNAConfigPMKLifetime; 2431 case RSNA_PMK_REAUTH_THRESHOLD: 2432 return sm->dot11RSNAConfigPMKReauthThreshold; 2433 case RSNA_SA_TIMEOUT: 2434 return sm->dot11RSNAConfigSATimeout; 2435 case WPA_PARAM_PROTO: 2436 return sm->proto; 2437 case WPA_PARAM_PAIRWISE: 2438 return sm->pairwise_cipher; 2439 case WPA_PARAM_GROUP: 2440 return sm->group_cipher; 2441 case WPA_PARAM_KEY_MGMT: 2442 return sm->key_mgmt; 2443#ifdef CONFIG_IEEE80211W 2444 case WPA_PARAM_MGMT_GROUP: 2445 return sm->mgmt_group_cipher; 2446#endif /* CONFIG_IEEE80211W */ 2447 case WPA_PARAM_RSN_ENABLED: 2448 return sm->rsn_enabled; 2449 default: 2450 return 0; 2451 } 2452} 2453 2454 2455/** 2456 * wpa_sm_get_status - Get WPA state machine 2457 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2458 * @buf: Buffer for status information 2459 * @buflen: Maximum buffer length 2460 * @verbose: Whether to include verbose status information 2461 * Returns: Number of bytes written to buf. 2462 * 2463 * Query WPA state machine for status information. This function fills in 2464 * a text area with current status information. If the buffer (buf) is not 2465 * large enough, status information will be truncated to fit the buffer. 2466 */ 2467int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 2468 int verbose) 2469{ 2470 char *pos = buf, *end = buf + buflen; 2471 int ret; 2472 2473 ret = os_snprintf(pos, end - pos, 2474 "pairwise_cipher=%s\n" 2475 "group_cipher=%s\n" 2476 "key_mgmt=%s\n", 2477 wpa_cipher_txt(sm->pairwise_cipher), 2478 wpa_cipher_txt(sm->group_cipher), 2479 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 2480 if (ret < 0 || ret >= end - pos) 2481 return pos - buf; 2482 pos += ret; 2483 return pos - buf; 2484} 2485 2486 2487/** 2488 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration 2489 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2490 * @wpa_ie: Pointer to buffer for WPA/RSN IE 2491 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer 2492 * Returns: 0 on success, -1 on failure 2493 */ 2494int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, 2495 size_t *wpa_ie_len) 2496{ 2497 int res; 2498 2499 if (sm == NULL) 2500 return -1; 2501 2502 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); 2503 if (res < 0) 2504 return -1; 2505 *wpa_ie_len = res; 2506 2507 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", 2508 wpa_ie, *wpa_ie_len); 2509 2510 if (sm->assoc_wpa_ie == NULL) { 2511 /* 2512 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets 2513 * the correct version of the IE even if PMKSA caching is 2514 * aborted (which would remove PMKID from IE generation). 2515 */ 2516 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); 2517 if (sm->assoc_wpa_ie == NULL) 2518 return -1; 2519 2520 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); 2521 sm->assoc_wpa_ie_len = *wpa_ie_len; 2522 } 2523 2524 return 0; 2525} 2526 2527 2528/** 2529 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq 2530 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2531 * @ie: Pointer to IE data (starting from id) 2532 * @len: IE length 2533 * Returns: 0 on success, -1 on failure 2534 * 2535 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association 2536 * Request frame. The IE will be used to override the default value generated 2537 * with wpa_sm_set_assoc_wpa_ie_default(). 2538 */ 2539int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2540{ 2541 if (sm == NULL) 2542 return -1; 2543 2544 os_free(sm->assoc_wpa_ie); 2545 if (ie == NULL || len == 0) { 2546 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2547 "WPA: clearing own WPA/RSN IE"); 2548 sm->assoc_wpa_ie = NULL; 2549 sm->assoc_wpa_ie_len = 0; 2550 } else { 2551 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); 2552 sm->assoc_wpa_ie = os_malloc(len); 2553 if (sm->assoc_wpa_ie == NULL) 2554 return -1; 2555 2556 os_memcpy(sm->assoc_wpa_ie, ie, len); 2557 sm->assoc_wpa_ie_len = len; 2558 } 2559 2560 return 0; 2561} 2562 2563 2564/** 2565 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp 2566 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2567 * @ie: Pointer to IE data (starting from id) 2568 * @len: IE length 2569 * Returns: 0 on success, -1 on failure 2570 * 2571 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response 2572 * frame. 2573 */ 2574int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2575{ 2576 if (sm == NULL) 2577 return -1; 2578 2579 os_free(sm->ap_wpa_ie); 2580 if (ie == NULL || len == 0) { 2581 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2582 "WPA: clearing AP WPA IE"); 2583 sm->ap_wpa_ie = NULL; 2584 sm->ap_wpa_ie_len = 0; 2585 } else { 2586 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); 2587 sm->ap_wpa_ie = os_malloc(len); 2588 if (sm->ap_wpa_ie == NULL) 2589 return -1; 2590 2591 os_memcpy(sm->ap_wpa_ie, ie, len); 2592 sm->ap_wpa_ie_len = len; 2593 } 2594 2595 return 0; 2596} 2597 2598 2599/** 2600 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp 2601 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2602 * @ie: Pointer to IE data (starting from id) 2603 * @len: IE length 2604 * Returns: 0 on success, -1 on failure 2605 * 2606 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response 2607 * frame. 2608 */ 2609int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2610{ 2611 if (sm == NULL) 2612 return -1; 2613 2614 os_free(sm->ap_rsn_ie); 2615 if (ie == NULL || len == 0) { 2616 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2617 "WPA: clearing AP RSN IE"); 2618 sm->ap_rsn_ie = NULL; 2619 sm->ap_rsn_ie_len = 0; 2620 } else { 2621 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); 2622 sm->ap_rsn_ie = os_malloc(len); 2623 if (sm->ap_rsn_ie == NULL) 2624 return -1; 2625 2626 os_memcpy(sm->ap_rsn_ie, ie, len); 2627 sm->ap_rsn_ie_len = len; 2628 } 2629 2630 return 0; 2631} 2632 2633 2634/** 2635 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE 2636 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2637 * @data: Pointer to data area for parsing results 2638 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure 2639 * 2640 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the 2641 * parsed data into data. 2642 */ 2643int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) 2644{ 2645 if (sm == NULL) 2646 return -1; 2647 2648 if (sm->assoc_wpa_ie == NULL) { 2649 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2650 "WPA: No WPA/RSN IE available from association info"); 2651 return -1; 2652 } 2653 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) 2654 return -2; 2655 return 0; 2656} 2657 2658 2659int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) 2660{ 2661#ifndef CONFIG_NO_WPA2 2662 return pmksa_cache_list(sm->pmksa, buf, len); 2663#else /* CONFIG_NO_WPA2 */ 2664 return -1; 2665#endif /* CONFIG_NO_WPA2 */ 2666} 2667 2668 2669void wpa_sm_drop_sa(struct wpa_sm *sm) 2670{ 2671 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 2672 sm->ptk_set = 0; 2673 sm->tptk_set = 0; 2674 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2675 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2676 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2677} 2678 2679 2680int wpa_sm_has_ptk(struct wpa_sm *sm) 2681{ 2682 if (sm == NULL) 2683 return 0; 2684 return sm->ptk_set; 2685} 2686 2687 2688void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 2689{ 2690 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 2691} 2692 2693 2694void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 2695{ 2696#ifndef CONFIG_NO_WPA2 2697 pmksa_cache_flush(sm->pmksa, network_ctx); 2698#endif /* CONFIG_NO_WPA2 */ 2699} 2700 2701 2702#ifdef CONFIG_IEEE80211V 2703int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 2704{ 2705 struct wpa_gtk_data gd; 2706#ifdef CONFIG_IEEE80211W 2707 struct wpa_igtk_kde igd; 2708 u16 keyidx; 2709#endif /* CONFIG_IEEE80211W */ 2710 u16 keyinfo; 2711 u8 keylen; /* plaintext key len */ 2712 u8 keydatalen; 2713 u8 *key_rsc; 2714 2715 os_memset(&gd, 0, sizeof(gd)); 2716#ifdef CONFIG_IEEE80211W 2717 os_memset(&igd, 0, sizeof(igd)); 2718#endif /* CONFIG_IEEE80211W */ 2719 2720 switch (sm->group_cipher) { 2721 case WPA_CIPHER_CCMP: 2722 keylen = 16; 2723 gd.key_rsc_len = 6; 2724 gd.alg = WPA_ALG_CCMP; 2725 break; 2726 case WPA_CIPHER_GCMP: 2727 keylen = 16; 2728 gd.key_rsc_len = 6; 2729 gd.alg = WPA_ALG_GCMP; 2730 break; 2731 case WPA_CIPHER_TKIP: 2732 keylen = 32; 2733 gd.key_rsc_len = 6; 2734 gd.alg = WPA_ALG_TKIP; 2735 break; 2736 case WPA_CIPHER_WEP104: 2737 keylen = 13; 2738 gd.key_rsc_len = 0; 2739 gd.alg = WPA_ALG_WEP; 2740 break; 2741 case WPA_CIPHER_WEP40: 2742 keylen = 5; 2743 gd.key_rsc_len = 0; 2744 gd.alg = WPA_ALG_WEP; 2745 break; 2746 default: 2747 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 2748 return -1; 2749 } 2750 2751 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 2752 key_rsc = buf + 5; 2753 keyinfo = WPA_GET_LE16(buf+2); 2754 keydatalen = buf[1] - 11 - 8; 2755 gd.gtk_len = keylen; 2756 if (gd.gtk_len != buf[4]) { 2757 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 2758 gd.gtk_len, buf[4]); 2759 return -1; 2760 } 2761 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 2762 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 2763 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 2764 2765 if (keydatalen % 8) { 2766 wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len " 2767 "%d", keydatalen); 2768 return -1; 2769 } 2770 2771 if (aes_unwrap(sm->ptk.kek, keydatalen / 8, buf + 13, gd.gtk)) 2772 { 2773 wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - " 2774 "could not decrypt GTK"); 2775 return -1; 2776 } 2777 2778 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 2779 gd.gtk, gd.gtk_len); 2780 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) { 2781 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 2782 "WNM mode"); 2783 return -1; 2784 } 2785#ifdef CONFIG_IEEE80211W 2786 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 2787 if (buf[1] != 2 + 6 + WPA_IGTK_LEN + 8) { 2788 wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len " 2789 "%d", buf[1] - 2 - 6 - 8); 2790 return -1; 2791 } 2792 os_memcpy(igd.keyid, buf + 2, 2); 2793 os_memcpy(igd.pn, buf + 4, 6); 2794 2795 keyidx = WPA_GET_LE16(igd.keyid); 2796 2797 if (aes_unwrap(sm->ptk.kek, WPA_IGTK_LEN / 8, buf + 10, 2798 igd.igtk)) { 2799 wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - " 2800 "could not decrypr IGTK"); 2801 return -1; 2802 } 2803 2804 wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", 2805 igd.igtk, WPA_IGTK_LEN); 2806 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr, 2807 keyidx, 0, igd.pn, sizeof(igd.pn), 2808 igd.igtk, WPA_IGTK_LEN) < 0) { 2809 wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " 2810 "WNM mode"); 2811 return -1; 2812 } 2813#endif /* CONFIG_IEEE80211W */ 2814 } else { 2815 wpa_printf(MSG_DEBUG, "Unknown element id"); 2816 return -1; 2817 } 2818 2819 return 0; 2820} 2821#endif /* CONFIG_IEEE80211V */ 2822