1 /* 2 * WPA Supplicant - WPA state machine and EAPOL-Key processing 3 * Copyright (c) 2003-2015, Jouni Malinen <j (at) w1.fi> 4 * Copyright(c) 2015 Intel Deutschland GmbH 5 * 6 * This software may be distributed under the terms of the BSD license. 7 * See README for more details. 8 */ 9 10 #include "includes.h" 11 12 #include "common.h" 13 #include "crypto/aes.h" 14 #include "crypto/aes_wrap.h" 15 #include "crypto/crypto.h" 16 #include "crypto/random.h" 17 #include "crypto/aes_siv.h" 18 #include "common/ieee802_11_defs.h" 19 #include "common/ieee802_11_common.h" 20 #include "eap_common/eap_defs.h" 21 #include "eapol_supp/eapol_supp_sm.h" 22 #include "wpa.h" 23 #include "eloop.h" 24 #include "preauth.h" 25 #include "pmksa_cache.h" 26 #include "wpa_i.h" 27 #include "wpa_ie.h" 28 #include "peerkey.h" 29 30 31 static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 32 33 34 /** 35 * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message 36 * @sm: Pointer to WPA state machine data from wpa_sm_init() 37 * @ptk: PTK for Key Confirmation/Encryption Key 38 * @ver: Version field from Key Info 39 * @dest: Destination address for the frame 40 * @proto: Ethertype (usually ETH_P_EAPOL) 41 * @msg: EAPOL-Key message 42 * @msg_len: Length of message 43 * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written 44 * Returns: >= 0 on success, < 0 on failure 45 */ 46 int wpa_eapol_key_send(struct wpa_sm *sm, struct wpa_ptk *ptk, 47 int ver, const u8 *dest, u16 proto, 48 u8 *msg, size_t msg_len, u8 *key_mic) 49 { 50 int ret = -1; 51 size_t mic_len = wpa_mic_len(sm->key_mgmt); 52 53 if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) { 54 /* 55 * Association event was not yet received; try to fetch 56 * BSSID from the driver. 57 */ 58 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) { 59 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 60 "WPA: Failed to read BSSID for " 61 "EAPOL-Key destination address"); 62 } else { 63 dest = sm->bssid; 64 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 65 "WPA: Use BSSID (" MACSTR 66 ") as the destination for EAPOL-Key", 67 MAC2STR(dest)); 68 } 69 } 70 71 if (mic_len) { 72 if (key_mic && (!ptk || !ptk->kck_len)) 73 goto out; 74 75 if (key_mic && 76 wpa_eapol_key_mic(ptk->kck, ptk->kck_len, sm->key_mgmt, ver, 77 msg, msg_len, key_mic)) { 78 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 79 "WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC", 80 ver, sm->key_mgmt); 81 goto out; 82 } 83 if (ptk) 84 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", 85 ptk->kck, ptk->kck_len); 86 wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", 87 key_mic, mic_len); 88 } else { 89 #ifdef CONFIG_FILS 90 /* AEAD cipher - Key MIC field not used */ 91 struct ieee802_1x_hdr *s_hdr, *hdr; 92 struct wpa_eapol_key *s_key, *key; 93 u8 *buf, *s_key_data, *key_data; 94 size_t buf_len = msg_len + AES_BLOCK_SIZE; 95 size_t key_data_len; 96 u16 eapol_len; 97 const u8 *aad[1]; 98 size_t aad_len[1]; 99 100 if (!ptk || !ptk->kek_len) 101 goto out; 102 103 key_data_len = msg_len - sizeof(struct ieee802_1x_hdr) - 104 sizeof(struct wpa_eapol_key) - 2; 105 106 buf = os_malloc(buf_len); 107 if (!buf) 108 goto out; 109 110 os_memcpy(buf, msg, msg_len); 111 hdr = (struct ieee802_1x_hdr *) buf; 112 key = (struct wpa_eapol_key *) (hdr + 1); 113 key_data = ((u8 *) (key + 1)) + 2; 114 115 /* Update EAPOL header to include AES-SIV overhead */ 116 eapol_len = be_to_host16(hdr->length); 117 eapol_len += AES_BLOCK_SIZE; 118 hdr->length = host_to_be16(eapol_len); 119 120 /* Update Key Data Length field to include AES-SIV overhead */ 121 WPA_PUT_BE16((u8 *) (key + 1), AES_BLOCK_SIZE + key_data_len); 122 123 s_hdr = (struct ieee802_1x_hdr *) msg; 124 s_key = (struct wpa_eapol_key *) (s_hdr + 1); 125 s_key_data = ((u8 *) (s_key + 1)) + 2; 126 127 wpa_hexdump_key(MSG_DEBUG, "WPA: Plaintext Key Data", 128 s_key_data, key_data_len); 129 130 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len); 131 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to 132 * to Key Data (exclusive). */ 133 aad[0] = buf; 134 aad_len[0] = key_data - buf; 135 if (aes_siv_encrypt(ptk->kek, ptk->kek_len, 136 s_key_data, key_data_len, 137 1, aad, aad_len, key_data) < 0) { 138 os_free(buf); 139 goto out; 140 } 141 142 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", 143 key_data, AES_BLOCK_SIZE + key_data_len); 144 145 os_free(msg); 146 msg = buf; 147 msg_len = buf_len; 148 #else /* CONFIG_FILS */ 149 goto out; 150 #endif /* CONFIG_FILS */ 151 } 152 153 wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len); 154 ret = wpa_sm_ether_send(sm, dest, proto, msg, msg_len); 155 eapol_sm_notify_tx_eapol_key(sm->eapol); 156 out: 157 os_free(msg); 158 return ret; 159 } 160 161 162 /** 163 * wpa_sm_key_request - Send EAPOL-Key Request 164 * @sm: Pointer to WPA state machine data from wpa_sm_init() 165 * @error: Indicate whether this is an Michael MIC error report 166 * @pairwise: 1 = error report for pairwise packet, 0 = for group packet 167 * 168 * Send an EAPOL-Key Request to the current authenticator. This function is 169 * used to request rekeying and it is usually called when a local Michael MIC 170 * failure is detected. 171 */ 172 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise) 173 { 174 size_t mic_len, hdrlen, rlen; 175 struct wpa_eapol_key *reply; 176 int key_info, ver; 177 u8 bssid[ETH_ALEN], *rbuf, *key_mic, *mic; 178 179 if (sm->key_mgmt == WPA_KEY_MGMT_OSEN || 180 wpa_key_mgmt_suite_b(sm->key_mgmt)) 181 ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; 182 else if (wpa_key_mgmt_ft(sm->key_mgmt) || 183 wpa_key_mgmt_sha256(sm->key_mgmt)) 184 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; 185 else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) 186 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; 187 else 188 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; 189 190 if (wpa_sm_get_bssid(sm, bssid) < 0) { 191 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 192 "Failed to read BSSID for EAPOL-Key request"); 193 return; 194 } 195 196 mic_len = wpa_mic_len(sm->key_mgmt); 197 hdrlen = sizeof(*reply) + mic_len + 2; 198 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 199 hdrlen, &rlen, (void *) &reply); 200 if (rbuf == NULL) 201 return; 202 203 reply->type = (sm->proto == WPA_PROTO_RSN || 204 sm->proto == WPA_PROTO_OSEN) ? 205 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 206 key_info = WPA_KEY_INFO_REQUEST | ver; 207 if (sm->ptk_set) 208 key_info |= WPA_KEY_INFO_SECURE; 209 if (sm->ptk_set && mic_len) 210 key_info |= WPA_KEY_INFO_MIC; 211 if (error) 212 key_info |= WPA_KEY_INFO_ERROR; 213 if (pairwise) 214 key_info |= WPA_KEY_INFO_KEY_TYPE; 215 WPA_PUT_BE16(reply->key_info, key_info); 216 WPA_PUT_BE16(reply->key_length, 0); 217 os_memcpy(reply->replay_counter, sm->request_counter, 218 WPA_REPLAY_COUNTER_LEN); 219 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); 220 221 mic = (u8 *) (reply + 1); 222 WPA_PUT_BE16(mic + mic_len, 0); 223 if (!(key_info & WPA_KEY_INFO_MIC)) 224 key_mic = NULL; 225 else 226 key_mic = mic; 227 228 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 229 "WPA: Sending EAPOL-Key Request (error=%d " 230 "pairwise=%d ptk_set=%d len=%lu)", 231 error, pairwise, sm->ptk_set, (unsigned long) rlen); 232 wpa_eapol_key_send(sm, &sm->ptk, ver, bssid, ETH_P_EAPOL, rbuf, rlen, 233 key_mic); 234 } 235 236 237 static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm) 238 { 239 #ifdef CONFIG_IEEE80211R 240 if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { 241 if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len)) 242 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 243 "RSN: Cannot set low order 256 bits of MSK for key management offload"); 244 } else { 245 #endif /* CONFIG_IEEE80211R */ 246 if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len)) 247 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 248 "RSN: Cannot set PMK for key management offload"); 249 #ifdef CONFIG_IEEE80211R 250 } 251 #endif /* CONFIG_IEEE80211R */ 252 } 253 254 255 static int wpa_supplicant_get_pmk(struct wpa_sm *sm, 256 const unsigned char *src_addr, 257 const u8 *pmkid) 258 { 259 int abort_cached = 0; 260 261 if (pmkid && !sm->cur_pmksa) { 262 /* When using drivers that generate RSN IE, wpa_supplicant may 263 * not have enough time to get the association information 264 * event before receiving this 1/4 message, so try to find a 265 * matching PMKSA cache entry here. */ 266 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, 267 NULL); 268 if (sm->cur_pmksa) { 269 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 270 "RSN: found matching PMKID from PMKSA cache"); 271 } else { 272 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 273 "RSN: no matching PMKID found"); 274 abort_cached = 1; 275 } 276 } 277 278 if (pmkid && sm->cur_pmksa && 279 os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { 280 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); 281 wpa_sm_set_pmk_from_pmksa(sm); 282 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", 283 sm->pmk, sm->pmk_len); 284 eapol_sm_notify_cached(sm->eapol); 285 #ifdef CONFIG_IEEE80211R 286 sm->xxkey_len = 0; 287 #endif /* CONFIG_IEEE80211R */ 288 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { 289 int res, pmk_len; 290 291 if (wpa_key_mgmt_sha384(sm->key_mgmt)) 292 pmk_len = PMK_LEN_SUITE_B_192; 293 else 294 pmk_len = PMK_LEN; 295 res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len); 296 if (res) { 297 if (pmk_len == PMK_LEN) { 298 /* 299 * EAP-LEAP is an exception from other EAP 300 * methods: it uses only 16-byte PMK. 301 */ 302 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); 303 pmk_len = 16; 304 } 305 } else { 306 #ifdef CONFIG_IEEE80211R 307 u8 buf[2 * PMK_LEN]; 308 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) 309 { 310 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN); 311 sm->xxkey_len = PMK_LEN; 312 os_memset(buf, 0, sizeof(buf)); 313 } 314 #endif /* CONFIG_IEEE80211R */ 315 } 316 if (res == 0) { 317 struct rsn_pmksa_cache_entry *sa = NULL; 318 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " 319 "machines", sm->pmk, pmk_len); 320 sm->pmk_len = pmk_len; 321 wpa_supplicant_key_mgmt_set_pmk(sm); 322 if (sm->proto == WPA_PROTO_RSN && 323 !wpa_key_mgmt_suite_b(sm->key_mgmt) && 324 !wpa_key_mgmt_ft(sm->key_mgmt)) { 325 sa = pmksa_cache_add(sm->pmksa, 326 sm->pmk, pmk_len, NULL, 327 NULL, 0, 328 src_addr, sm->own_addr, 329 sm->network_ctx, 330 sm->key_mgmt); 331 } 332 if (!sm->cur_pmksa && pmkid && 333 pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL)) 334 { 335 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 336 "RSN: the new PMK matches with the " 337 "PMKID"); 338 abort_cached = 0; 339 } else if (sa && !sm->cur_pmksa && pmkid) { 340 /* 341 * It looks like the authentication server 342 * derived mismatching MSK. This should not 343 * really happen, but bugs happen.. There is not 344 * much we can do here without knowing what 345 * exactly caused the server to misbehave. 346 */ 347 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 348 "RSN: PMKID mismatch - authentication server may have derived different MSK?!"); 349 return -1; 350 } 351 352 if (!sm->cur_pmksa) 353 sm->cur_pmksa = sa; 354 } else { 355 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 356 "WPA: Failed to get master session key from " 357 "EAPOL state machines - key handshake " 358 "aborted"); 359 if (sm->cur_pmksa) { 360 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 361 "RSN: Cancelled PMKSA caching " 362 "attempt"); 363 sm->cur_pmksa = NULL; 364 abort_cached = 1; 365 } else if (!abort_cached) { 366 return -1; 367 } 368 } 369 } 370 371 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && 372 !wpa_key_mgmt_suite_b(sm->key_mgmt) && 373 !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) 374 { 375 /* Send EAPOL-Start to trigger full EAP authentication. */ 376 u8 *buf; 377 size_t buflen; 378 379 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 380 "RSN: no PMKSA entry found - trigger " 381 "full EAP authentication"); 382 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, 383 NULL, 0, &buflen, NULL); 384 if (buf) { 385 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, 386 buf, buflen); 387 os_free(buf); 388 return -2; 389 } 390 391 return -1; 392 } 393 394 return 0; 395 } 396 397 398 /** 399 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake 400 * @sm: Pointer to WPA state machine data from wpa_sm_init() 401 * @dst: Destination address for the frame 402 * @key: Pointer to the EAPOL-Key frame header 403 * @ver: Version bits from EAPOL-Key Key Info 404 * @nonce: Nonce value for the EAPOL-Key frame 405 * @wpa_ie: WPA/RSN IE 406 * @wpa_ie_len: Length of the WPA/RSN IE 407 * @ptk: PTK to use for keyed hash and encryption 408 * Returns: >= 0 on success, < 0 on failure 409 */ 410 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, 411 const struct wpa_eapol_key *key, 412 int ver, const u8 *nonce, 413 const u8 *wpa_ie, size_t wpa_ie_len, 414 struct wpa_ptk *ptk) 415 { 416 size_t mic_len, hdrlen, rlen; 417 struct wpa_eapol_key *reply; 418 u8 *rbuf, *key_mic; 419 u8 *rsn_ie_buf = NULL; 420 u16 key_info; 421 422 if (wpa_ie == NULL) { 423 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " 424 "cannot generate msg 2/4"); 425 return -1; 426 } 427 428 #ifdef CONFIG_IEEE80211R 429 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 430 int res; 431 432 /* 433 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and 434 * FTIE from (Re)Association Response. 435 */ 436 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + 437 sm->assoc_resp_ies_len); 438 if (rsn_ie_buf == NULL) 439 return -1; 440 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); 441 res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len, 442 sm->pmk_r1_name); 443 if (res < 0) { 444 os_free(rsn_ie_buf); 445 return -1; 446 } 447 448 if (sm->assoc_resp_ies) { 449 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, 450 sm->assoc_resp_ies_len); 451 wpa_ie_len += sm->assoc_resp_ies_len; 452 } 453 454 wpa_ie = rsn_ie_buf; 455 } 456 #endif /* CONFIG_IEEE80211R */ 457 458 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); 459 460 mic_len = wpa_mic_len(sm->key_mgmt); 461 hdrlen = sizeof(*reply) + mic_len + 2; 462 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, 463 NULL, hdrlen + wpa_ie_len, 464 &rlen, (void *) &reply); 465 if (rbuf == NULL) { 466 os_free(rsn_ie_buf); 467 return -1; 468 } 469 470 reply->type = (sm->proto == WPA_PROTO_RSN || 471 sm->proto == WPA_PROTO_OSEN) ? 472 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 473 key_info = ver | WPA_KEY_INFO_KEY_TYPE; 474 if (mic_len) 475 key_info |= WPA_KEY_INFO_MIC; 476 else 477 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; 478 WPA_PUT_BE16(reply->key_info, key_info); 479 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 480 WPA_PUT_BE16(reply->key_length, 0); 481 else 482 os_memcpy(reply->key_length, key->key_length, 2); 483 os_memcpy(reply->replay_counter, key->replay_counter, 484 WPA_REPLAY_COUNTER_LEN); 485 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, 486 WPA_REPLAY_COUNTER_LEN); 487 488 key_mic = (u8 *) (reply + 1); 489 WPA_PUT_BE16(key_mic + mic_len, wpa_ie_len); /* Key Data Length */ 490 os_memcpy(key_mic + mic_len + 2, wpa_ie, wpa_ie_len); /* Key Data */ 491 os_free(rsn_ie_buf); 492 493 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); 494 495 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); 496 return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, 497 key_mic); 498 } 499 500 501 static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, 502 const struct wpa_eapol_key *key, struct wpa_ptk *ptk) 503 { 504 #ifdef CONFIG_IEEE80211R 505 if (wpa_key_mgmt_ft(sm->key_mgmt)) 506 return wpa_derive_ptk_ft(sm, src_addr, key, ptk); 507 #endif /* CONFIG_IEEE80211R */ 508 509 return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", 510 sm->own_addr, sm->bssid, sm->snonce, 511 key->key_nonce, ptk, sm->key_mgmt, 512 sm->pairwise_cipher); 513 } 514 515 516 static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, 517 const unsigned char *src_addr, 518 const struct wpa_eapol_key *key, 519 u16 ver, const u8 *key_data, 520 size_t key_data_len) 521 { 522 struct wpa_eapol_ie_parse ie; 523 struct wpa_ptk *ptk; 524 int res; 525 u8 *kde, *kde_buf = NULL; 526 size_t kde_len; 527 528 if (wpa_sm_get_network_ctx(sm) == NULL) { 529 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " 530 "found (msg 1 of 4)"); 531 return; 532 } 533 534 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 535 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " 536 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 537 538 os_memset(&ie, 0, sizeof(ie)); 539 540 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 541 /* RSN: msg 1/4 should contain PMKID for the selected PMK */ 542 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", 543 key_data, key_data_len); 544 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) 545 goto failed; 546 if (ie.pmkid) { 547 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " 548 "Authenticator", ie.pmkid, PMKID_LEN); 549 } 550 } 551 552 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); 553 if (res == -2) { 554 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " 555 "msg 1/4 - requesting full EAP authentication"); 556 return; 557 } 558 if (res) 559 goto failed; 560 561 if (sm->renew_snonce) { 562 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { 563 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 564 "WPA: Failed to get random data for SNonce"); 565 goto failed; 566 } 567 sm->renew_snonce = 0; 568 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", 569 sm->snonce, WPA_NONCE_LEN); 570 } 571 572 /* Calculate PTK which will be stored as a temporary PTK until it has 573 * been verified when processing message 3/4. */ 574 ptk = &sm->tptk; 575 wpa_derive_ptk(sm, src_addr, key, ptk); 576 if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { 577 u8 buf[8]; 578 /* Supplicant: swap tx/rx Mic keys */ 579 os_memcpy(buf, &ptk->tk[16], 8); 580 os_memcpy(&ptk->tk[16], &ptk->tk[24], 8); 581 os_memcpy(&ptk->tk[24], buf, 8); 582 os_memset(buf, 0, sizeof(buf)); 583 } 584 sm->tptk_set = 1; 585 586 kde = sm->assoc_wpa_ie; 587 kde_len = sm->assoc_wpa_ie_len; 588 589 #ifdef CONFIG_P2P 590 if (sm->p2p) { 591 kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); 592 if (kde_buf) { 593 u8 *pos; 594 wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " 595 "into EAPOL-Key 2/4"); 596 os_memcpy(kde_buf, kde, kde_len); 597 kde = kde_buf; 598 pos = kde + kde_len; 599 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 600 *pos++ = RSN_SELECTOR_LEN + 1; 601 RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); 602 pos += RSN_SELECTOR_LEN; 603 *pos++ = 0x01; 604 kde_len = pos - kde; 605 } 606 } 607 #endif /* CONFIG_P2P */ 608 609 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, 610 kde, kde_len, ptk) < 0) 611 goto failed; 612 613 os_free(kde_buf); 614 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); 615 return; 616 617 failed: 618 os_free(kde_buf); 619 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 620 } 621 622 623 static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) 624 { 625 struct wpa_sm *sm = eloop_ctx; 626 rsn_preauth_candidate_process(sm); 627 } 628 629 630 static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, 631 const u8 *addr, int secure) 632 { 633 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 634 "WPA: Key negotiation completed with " 635 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), 636 wpa_cipher_txt(sm->pairwise_cipher), 637 wpa_cipher_txt(sm->group_cipher)); 638 wpa_sm_cancel_auth_timeout(sm); 639 wpa_sm_set_state(sm, WPA_COMPLETED); 640 641 if (secure) { 642 wpa_sm_mlme_setprotection( 643 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, 644 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 645 eapol_sm_notify_portValid(sm->eapol, TRUE); 646 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt)) 647 eapol_sm_notify_eap_success(sm->eapol, TRUE); 648 /* 649 * Start preauthentication after a short wait to avoid a 650 * possible race condition between the data receive and key 651 * configuration after the 4-Way Handshake. This increases the 652 * likelihood of the first preauth EAPOL-Start frame getting to 653 * the target AP. 654 */ 655 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL); 656 } 657 658 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { 659 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 660 "RSN: Authenticator accepted " 661 "opportunistic PMKSA entry - marking it valid"); 662 sm->cur_pmksa->opportunistic = 0; 663 } 664 665 #ifdef CONFIG_IEEE80211R 666 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 667 /* Prepare for the next transition */ 668 wpa_ft_prepare_auth_request(sm, NULL); 669 } 670 #endif /* CONFIG_IEEE80211R */ 671 } 672 673 674 static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) 675 { 676 struct wpa_sm *sm = eloop_ctx; 677 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); 678 wpa_sm_key_request(sm, 0, 1); 679 } 680 681 682 static int wpa_supplicant_install_ptk(struct wpa_sm *sm, 683 const struct wpa_eapol_key *key) 684 { 685 int keylen, rsclen; 686 enum wpa_alg alg; 687 const u8 *key_rsc; 688 689 if (sm->ptk.installed) { 690 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 691 "WPA: Do not re-install same PTK to the driver"); 692 return 0; 693 } 694 695 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 696 "WPA: Installing PTK to the driver"); 697 698 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 699 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " 700 "Suite: NONE - do not use pairwise keys"); 701 return 0; 702 } 703 704 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { 705 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 706 "WPA: Unsupported pairwise cipher %d", 707 sm->pairwise_cipher); 708 return -1; 709 } 710 711 alg = wpa_cipher_to_alg(sm->pairwise_cipher); 712 keylen = wpa_cipher_key_len(sm->pairwise_cipher); 713 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); 714 715 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 716 key_rsc = null_rsc; 717 } else { 718 key_rsc = key->key_rsc; 719 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); 720 } 721 722 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, 723 sm->ptk.tk, keylen) < 0) { 724 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 725 "WPA: Failed to set PTK to the " 726 "driver (alg=%d keylen=%d bssid=" MACSTR ")", 727 alg, keylen, MAC2STR(sm->bssid)); 728 return -1; 729 } 730 731 /* TK is not needed anymore in supplicant */ 732 os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); 733 sm->ptk.installed = 1; 734 735 if (sm->wpa_ptk_rekey) { 736 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 737 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, 738 sm, NULL); 739 } 740 741 return 0; 742 } 743 744 745 static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, 746 int group_cipher, 747 int keylen, int maxkeylen, 748 int *key_rsc_len, 749 enum wpa_alg *alg) 750 { 751 int klen; 752 753 *alg = wpa_cipher_to_alg(group_cipher); 754 if (*alg == WPA_ALG_NONE) { 755 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 756 "WPA: Unsupported Group Cipher %d", 757 group_cipher); 758 return -1; 759 } 760 *key_rsc_len = wpa_cipher_rsc_len(group_cipher); 761 762 klen = wpa_cipher_key_len(group_cipher); 763 if (keylen != klen || maxkeylen < klen) { 764 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 765 "WPA: Unsupported %s Group Cipher key length %d (%d)", 766 wpa_cipher_txt(group_cipher), keylen, maxkeylen); 767 return -1; 768 } 769 return 0; 770 } 771 772 773 struct wpa_gtk_data { 774 enum wpa_alg alg; 775 int tx, key_rsc_len, keyidx; 776 u8 gtk[32]; 777 int gtk_len; 778 }; 779 780 781 static int wpa_supplicant_install_gtk(struct wpa_sm *sm, 782 const struct wpa_gtk_data *gd, 783 const u8 *key_rsc, int wnm_sleep) 784 { 785 const u8 *_gtk = gd->gtk; 786 u8 gtk_buf[32]; 787 788 /* Detect possible key reinstallation */ 789 if ((sm->gtk.gtk_len == (size_t) gd->gtk_len && 790 os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) || 791 (sm->gtk_wnm_sleep.gtk_len == (size_t) gd->gtk_len && 792 os_memcmp(sm->gtk_wnm_sleep.gtk, gd->gtk, 793 sm->gtk_wnm_sleep.gtk_len) == 0)) { 794 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 795 "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)", 796 gd->keyidx, gd->tx, gd->gtk_len); 797 return 0; 798 } 799 800 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); 801 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 802 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", 803 gd->keyidx, gd->tx, gd->gtk_len); 804 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); 805 if (sm->group_cipher == WPA_CIPHER_TKIP) { 806 /* Swap Tx/Rx keys for Michael MIC */ 807 os_memcpy(gtk_buf, gd->gtk, 16); 808 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); 809 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); 810 _gtk = gtk_buf; 811 } 812 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 813 if (wpa_sm_set_key(sm, gd->alg, NULL, 814 gd->keyidx, 1, key_rsc, gd->key_rsc_len, 815 _gtk, gd->gtk_len) < 0) { 816 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 817 "WPA: Failed to set GTK to the driver " 818 "(Group only)"); 819 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 820 return -1; 821 } 822 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, 823 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, 824 _gtk, gd->gtk_len) < 0) { 825 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 826 "WPA: Failed to set GTK to " 827 "the driver (alg=%d keylen=%d keyidx=%d)", 828 gd->alg, gd->gtk_len, gd->keyidx); 829 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 830 return -1; 831 } 832 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 833 834 if (wnm_sleep) { 835 sm->gtk_wnm_sleep.gtk_len = gd->gtk_len; 836 os_memcpy(sm->gtk_wnm_sleep.gtk, gd->gtk, 837 sm->gtk_wnm_sleep.gtk_len); 838 } else { 839 sm->gtk.gtk_len = gd->gtk_len; 840 os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len); 841 } 842 843 return 0; 844 } 845 846 847 static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, 848 int tx) 849 { 850 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { 851 /* Ignore Tx bit for GTK if a pairwise key is used. One AP 852 * seemed to set this bit (incorrectly, since Tx is only when 853 * doing Group Key only APs) and without this workaround, the 854 * data connection does not work because wpa_supplicant 855 * configured non-zero keyidx to be used for unicast. */ 856 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 857 "WPA: Tx bit set for GTK, but pairwise " 858 "keys are used - ignore Tx bit"); 859 return 0; 860 } 861 return tx; 862 } 863 864 865 static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm, 866 const u8 *rsc) 867 { 868 int rsclen; 869 870 if (!sm->wpa_rsc_relaxation) 871 return 0; 872 873 rsclen = wpa_cipher_rsc_len(sm->group_cipher); 874 875 /* 876 * Try to detect RSC (endian) corruption issue where the AP sends 877 * the RSC bytes in EAPOL-Key message in the wrong order, both if 878 * it's actually a 6-byte field (as it should be) and if it treats 879 * it as an 8-byte field. 880 * An AP model known to have this bug is the Sapido RB-1632. 881 */ 882 if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) { 883 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 884 "RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0", 885 rsc[0], rsc[1], rsc[2], rsc[3], 886 rsc[4], rsc[5], rsc[6], rsc[7]); 887 888 return 1; 889 } 890 891 return 0; 892 } 893 894 895 static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, 896 const struct wpa_eapol_key *key, 897 const u8 *gtk, size_t gtk_len, 898 int key_info) 899 { 900 struct wpa_gtk_data gd; 901 const u8 *key_rsc; 902 903 /* 904 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x 905 * GTK KDE format: 906 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] 907 * Reserved [bits 0-7] 908 * GTK 909 */ 910 911 os_memset(&gd, 0, sizeof(gd)); 912 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", 913 gtk, gtk_len); 914 915 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) 916 return -1; 917 918 gd.keyidx = gtk[0] & 0x3; 919 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 920 !!(gtk[0] & BIT(2))); 921 gtk += 2; 922 gtk_len -= 2; 923 924 os_memcpy(gd.gtk, gtk, gtk_len); 925 gd.gtk_len = gtk_len; 926 927 key_rsc = key->key_rsc; 928 if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) 929 key_rsc = null_rsc; 930 931 if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && 932 (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 933 gtk_len, gtk_len, 934 &gd.key_rsc_len, &gd.alg) || 935 wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0))) { 936 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 937 "RSN: Failed to install GTK"); 938 os_memset(&gd, 0, sizeof(gd)); 939 return -1; 940 } 941 os_memset(&gd, 0, sizeof(gd)); 942 943 wpa_supplicant_key_neg_complete(sm, sm->bssid, 944 key_info & WPA_KEY_INFO_SECURE); 945 return 0; 946 } 947 948 949 #ifdef CONFIG_IEEE80211W 950 static int wpa_supplicant_install_igtk(struct wpa_sm *sm, 951 const struct wpa_igtk_kde *igtk, 952 int wnm_sleep) 953 { 954 size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher); 955 u16 keyidx = WPA_GET_LE16(igtk->keyid); 956 957 /* Detect possible key reinstallation */ 958 if ((sm->igtk.igtk_len == len && 959 os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) || 960 (sm->igtk_wnm_sleep.igtk_len == len && 961 os_memcmp(sm->igtk_wnm_sleep.igtk, igtk->igtk, 962 sm->igtk_wnm_sleep.igtk_len) == 0)) { 963 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 964 "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)", 965 keyidx); 966 return 0; 967 } 968 969 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 970 "WPA: IGTK keyid %d pn %02x%02x%02x%02x%02x%02x", 971 keyidx, MAC2STR(igtk->pn)); 972 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len); 973 if (keyidx > 4095) { 974 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 975 "WPA: Invalid IGTK KeyID %d", keyidx); 976 return -1; 977 } 978 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), 979 broadcast_ether_addr, 980 keyidx, 0, igtk->pn, sizeof(igtk->pn), 981 igtk->igtk, len) < 0) { 982 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 983 "WPA: Failed to configure IGTK to the driver"); 984 return -1; 985 } 986 987 if (wnm_sleep) { 988 sm->igtk_wnm_sleep.igtk_len = len; 989 os_memcpy(sm->igtk_wnm_sleep.igtk, igtk->igtk, 990 sm->igtk_wnm_sleep.igtk_len); 991 } else { 992 sm->igtk.igtk_len = len; 993 os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len); 994 } 995 996 return 0; 997 } 998 #endif /* CONFIG_IEEE80211W */ 999 1000 1001 static int ieee80211w_set_keys(struct wpa_sm *sm, 1002 struct wpa_eapol_ie_parse *ie) 1003 { 1004 #ifdef CONFIG_IEEE80211W 1005 if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) 1006 return 0; 1007 1008 if (ie->igtk) { 1009 size_t len; 1010 const struct wpa_igtk_kde *igtk; 1011 1012 len = wpa_cipher_key_len(sm->mgmt_group_cipher); 1013 if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) 1014 return -1; 1015 1016 igtk = (const struct wpa_igtk_kde *) ie->igtk; 1017 if (wpa_supplicant_install_igtk(sm, igtk, 0) < 0) 1018 return -1; 1019 } 1020 1021 return 0; 1022 #else /* CONFIG_IEEE80211W */ 1023 return 0; 1024 #endif /* CONFIG_IEEE80211W */ 1025 } 1026 1027 1028 static void wpa_report_ie_mismatch(struct wpa_sm *sm, 1029 const char *reason, const u8 *src_addr, 1030 const u8 *wpa_ie, size_t wpa_ie_len, 1031 const u8 *rsn_ie, size_t rsn_ie_len) 1032 { 1033 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", 1034 reason, MAC2STR(src_addr)); 1035 1036 if (sm->ap_wpa_ie) { 1037 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", 1038 sm->ap_wpa_ie, sm->ap_wpa_ie_len); 1039 } 1040 if (wpa_ie) { 1041 if (!sm->ap_wpa_ie) { 1042 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1043 "WPA: No WPA IE in Beacon/ProbeResp"); 1044 } 1045 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", 1046 wpa_ie, wpa_ie_len); 1047 } 1048 1049 if (sm->ap_rsn_ie) { 1050 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", 1051 sm->ap_rsn_ie, sm->ap_rsn_ie_len); 1052 } 1053 if (rsn_ie) { 1054 if (!sm->ap_rsn_ie) { 1055 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1056 "WPA: No RSN IE in Beacon/ProbeResp"); 1057 } 1058 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", 1059 rsn_ie, rsn_ie_len); 1060 } 1061 1062 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); 1063 } 1064 1065 1066 #ifdef CONFIG_IEEE80211R 1067 1068 static int ft_validate_mdie(struct wpa_sm *sm, 1069 const unsigned char *src_addr, 1070 struct wpa_eapol_ie_parse *ie, 1071 const u8 *assoc_resp_mdie) 1072 { 1073 struct rsn_mdie *mdie; 1074 1075 mdie = (struct rsn_mdie *) (ie->mdie + 2); 1076 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || 1077 os_memcmp(mdie->mobility_domain, sm->mobility_domain, 1078 MOBILITY_DOMAIN_ID_LEN) != 0) { 1079 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " 1080 "not match with the current mobility domain"); 1081 return -1; 1082 } 1083 1084 if (assoc_resp_mdie && 1085 (assoc_resp_mdie[1] != ie->mdie[1] || 1086 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { 1087 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); 1088 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", 1089 ie->mdie, 2 + ie->mdie[1]); 1090 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", 1091 assoc_resp_mdie, 2 + assoc_resp_mdie[1]); 1092 return -1; 1093 } 1094 1095 return 0; 1096 } 1097 1098 1099 static int ft_validate_ftie(struct wpa_sm *sm, 1100 const unsigned char *src_addr, 1101 struct wpa_eapol_ie_parse *ie, 1102 const u8 *assoc_resp_ftie) 1103 { 1104 if (ie->ftie == NULL) { 1105 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1106 "FT: No FTIE in EAPOL-Key msg 3/4"); 1107 return -1; 1108 } 1109 1110 if (assoc_resp_ftie == NULL) 1111 return 0; 1112 1113 if (assoc_resp_ftie[1] != ie->ftie[1] || 1114 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { 1115 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); 1116 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", 1117 ie->ftie, 2 + ie->ftie[1]); 1118 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", 1119 assoc_resp_ftie, 2 + assoc_resp_ftie[1]); 1120 return -1; 1121 } 1122 1123 return 0; 1124 } 1125 1126 1127 static int ft_validate_rsnie(struct wpa_sm *sm, 1128 const unsigned char *src_addr, 1129 struct wpa_eapol_ie_parse *ie) 1130 { 1131 struct wpa_ie_data rsn; 1132 1133 if (!ie->rsn_ie) 1134 return 0; 1135 1136 /* 1137 * Verify that PMKR1Name from EAPOL-Key message 3/4 1138 * matches with the value we derived. 1139 */ 1140 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || 1141 rsn.num_pmkid != 1 || rsn.pmkid == NULL) { 1142 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " 1143 "FT 4-way handshake message 3/4"); 1144 return -1; 1145 } 1146 1147 if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) 1148 { 1149 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1150 "FT: PMKR1Name mismatch in " 1151 "FT 4-way handshake message 3/4"); 1152 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", 1153 rsn.pmkid, WPA_PMK_NAME_LEN); 1154 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", 1155 sm->pmk_r1_name, WPA_PMK_NAME_LEN); 1156 return -1; 1157 } 1158 1159 return 0; 1160 } 1161 1162 1163 static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, 1164 const unsigned char *src_addr, 1165 struct wpa_eapol_ie_parse *ie) 1166 { 1167 const u8 *pos, *end, *mdie = NULL, *ftie = NULL; 1168 1169 if (sm->assoc_resp_ies) { 1170 pos = sm->assoc_resp_ies; 1171 end = pos + sm->assoc_resp_ies_len; 1172 while (end - pos > 2) { 1173 if (2 + pos[1] > end - pos) 1174 break; 1175 switch (*pos) { 1176 case WLAN_EID_MOBILITY_DOMAIN: 1177 mdie = pos; 1178 break; 1179 case WLAN_EID_FAST_BSS_TRANSITION: 1180 ftie = pos; 1181 break; 1182 } 1183 pos += 2 + pos[1]; 1184 } 1185 } 1186 1187 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || 1188 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || 1189 ft_validate_rsnie(sm, src_addr, ie) < 0) 1190 return -1; 1191 1192 return 0; 1193 } 1194 1195 #endif /* CONFIG_IEEE80211R */ 1196 1197 1198 static int wpa_supplicant_validate_ie(struct wpa_sm *sm, 1199 const unsigned char *src_addr, 1200 struct wpa_eapol_ie_parse *ie) 1201 { 1202 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { 1203 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1204 "WPA: No WPA/RSN IE for this AP known. " 1205 "Trying to get from scan results"); 1206 if (wpa_sm_get_beacon_ie(sm) < 0) { 1207 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1208 "WPA: Could not find AP from " 1209 "the scan results"); 1210 } else { 1211 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, 1212 "WPA: Found the current AP from " 1213 "updated scan results"); 1214 } 1215 } 1216 1217 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && 1218 (sm->ap_wpa_ie || sm->ap_rsn_ie)) { 1219 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 1220 "with IE in Beacon/ProbeResp (no IE?)", 1221 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1222 ie->rsn_ie, ie->rsn_ie_len); 1223 return -1; 1224 } 1225 1226 if ((ie->wpa_ie && sm->ap_wpa_ie && 1227 (ie->wpa_ie_len != sm->ap_wpa_ie_len || 1228 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || 1229 (ie->rsn_ie && sm->ap_rsn_ie && 1230 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), 1231 sm->ap_rsn_ie, sm->ap_rsn_ie_len, 1232 ie->rsn_ie, ie->rsn_ie_len))) { 1233 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 1234 "with IE in Beacon/ProbeResp", 1235 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1236 ie->rsn_ie, ie->rsn_ie_len); 1237 return -1; 1238 } 1239 1240 if (sm->proto == WPA_PROTO_WPA && 1241 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { 1242 wpa_report_ie_mismatch(sm, "Possible downgrade attack " 1243 "detected - RSN was enabled and RSN IE " 1244 "was in msg 3/4, but not in " 1245 "Beacon/ProbeResp", 1246 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1247 ie->rsn_ie, ie->rsn_ie_len); 1248 return -1; 1249 } 1250 1251 #ifdef CONFIG_IEEE80211R 1252 if (wpa_key_mgmt_ft(sm->key_mgmt) && 1253 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) 1254 return -1; 1255 #endif /* CONFIG_IEEE80211R */ 1256 1257 return 0; 1258 } 1259 1260 1261 /** 1262 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake 1263 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1264 * @dst: Destination address for the frame 1265 * @key: Pointer to the EAPOL-Key frame header 1266 * @ver: Version bits from EAPOL-Key Key Info 1267 * @key_info: Key Info 1268 * @ptk: PTK to use for keyed hash and encryption 1269 * Returns: >= 0 on success, < 0 on failure 1270 */ 1271 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 1272 const struct wpa_eapol_key *key, 1273 u16 ver, u16 key_info, 1274 struct wpa_ptk *ptk) 1275 { 1276 size_t mic_len, hdrlen, rlen; 1277 struct wpa_eapol_key *reply; 1278 u8 *rbuf, *key_mic; 1279 1280 mic_len = wpa_mic_len(sm->key_mgmt); 1281 hdrlen = sizeof(*reply) + mic_len + 2; 1282 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1283 hdrlen, &rlen, (void *) &reply); 1284 if (rbuf == NULL) 1285 return -1; 1286 1287 reply->type = (sm->proto == WPA_PROTO_RSN || 1288 sm->proto == WPA_PROTO_OSEN) ? 1289 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1290 key_info &= WPA_KEY_INFO_SECURE; 1291 key_info |= ver | WPA_KEY_INFO_KEY_TYPE; 1292 if (mic_len) 1293 key_info |= WPA_KEY_INFO_MIC; 1294 else 1295 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; 1296 WPA_PUT_BE16(reply->key_info, key_info); 1297 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1298 WPA_PUT_BE16(reply->key_length, 0); 1299 else 1300 os_memcpy(reply->key_length, key->key_length, 2); 1301 os_memcpy(reply->replay_counter, key->replay_counter, 1302 WPA_REPLAY_COUNTER_LEN); 1303 1304 key_mic = (u8 *) (reply + 1); 1305 WPA_PUT_BE16(key_mic + mic_len, 0); 1306 1307 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); 1308 return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, 1309 key_mic); 1310 } 1311 1312 1313 static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, 1314 const struct wpa_eapol_key *key, 1315 u16 ver, const u8 *key_data, 1316 size_t key_data_len) 1317 { 1318 u16 key_info, keylen; 1319 struct wpa_eapol_ie_parse ie; 1320 1321 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 1322 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " 1323 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); 1324 1325 key_info = WPA_GET_BE16(key->key_info); 1326 1327 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); 1328 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) 1329 goto failed; 1330 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1331 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1332 "WPA: GTK IE in unencrypted key data"); 1333 goto failed; 1334 } 1335 #ifdef CONFIG_IEEE80211W 1336 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1337 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1338 "WPA: IGTK KDE in unencrypted key data"); 1339 goto failed; 1340 } 1341 1342 if (ie.igtk && 1343 wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && 1344 ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + 1345 (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { 1346 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1347 "WPA: Invalid IGTK KDE length %lu", 1348 (unsigned long) ie.igtk_len); 1349 goto failed; 1350 } 1351 #endif /* CONFIG_IEEE80211W */ 1352 1353 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1354 goto failed; 1355 1356 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1357 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1358 "WPA: ANonce from message 1 of 4-Way Handshake " 1359 "differs from 3 of 4-Way Handshake - drop packet (src=" 1360 MACSTR ")", MAC2STR(sm->bssid)); 1361 goto failed; 1362 } 1363 1364 keylen = WPA_GET_BE16(key->key_length); 1365 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { 1366 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1367 "WPA: Invalid %s key length %d (src=" MACSTR 1368 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, 1369 MAC2STR(sm->bssid)); 1370 goto failed; 1371 } 1372 1373 #ifdef CONFIG_P2P 1374 if (ie.ip_addr_alloc) { 1375 os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); 1376 wpa_hexdump(MSG_DEBUG, "P2P: IP address info", 1377 sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); 1378 } 1379 #endif /* CONFIG_P2P */ 1380 1381 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1382 &sm->ptk) < 0) { 1383 goto failed; 1384 } 1385 1386 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1387 * for the next 4-Way Handshake. If msg 3 is received again, the old 1388 * SNonce will still be used to avoid changing PTK. */ 1389 sm->renew_snonce = 1; 1390 1391 if (key_info & WPA_KEY_INFO_INSTALL) { 1392 if (wpa_supplicant_install_ptk(sm, key)) 1393 goto failed; 1394 } 1395 1396 if (key_info & WPA_KEY_INFO_SECURE) { 1397 wpa_sm_mlme_setprotection( 1398 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1399 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1400 eapol_sm_notify_portValid(sm->eapol, TRUE); 1401 } 1402 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1403 1404 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { 1405 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1406 key_info & WPA_KEY_INFO_SECURE); 1407 } else if (ie.gtk && 1408 wpa_supplicant_pairwise_gtk(sm, key, 1409 ie.gtk, ie.gtk_len, key_info) < 0) { 1410 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1411 "RSN: Failed to configure GTK"); 1412 goto failed; 1413 } 1414 1415 if (ieee80211w_set_keys(sm, &ie) < 0) { 1416 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1417 "RSN: Failed to configure IGTK"); 1418 goto failed; 1419 } 1420 1421 if (ie.gtk) 1422 wpa_sm_set_rekey_offload(sm); 1423 1424 if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt)) { 1425 struct rsn_pmksa_cache_entry *sa; 1426 1427 sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL, 1428 sm->ptk.kck, sm->ptk.kck_len, 1429 sm->bssid, sm->own_addr, 1430 sm->network_ctx, sm->key_mgmt); 1431 if (!sm->cur_pmksa) 1432 sm->cur_pmksa = sa; 1433 } 1434 1435 sm->msg_3_of_4_ok = 1; 1436 return; 1437 1438 failed: 1439 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1440 } 1441 1442 1443 static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1444 const u8 *keydata, 1445 size_t keydatalen, 1446 u16 key_info, 1447 struct wpa_gtk_data *gd) 1448 { 1449 int maxkeylen; 1450 struct wpa_eapol_ie_parse ie; 1451 1452 wpa_hexdump_key(MSG_DEBUG, "RSN: msg 1/2 key data", 1453 keydata, keydatalen); 1454 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1455 return -1; 1456 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1457 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1458 "WPA: GTK IE in unencrypted key data"); 1459 return -1; 1460 } 1461 if (ie.gtk == NULL) { 1462 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1463 "WPA: No GTK IE in Group Key msg 1/2"); 1464 return -1; 1465 } 1466 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1467 1468 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1469 gd->gtk_len, maxkeylen, 1470 &gd->key_rsc_len, &gd->alg)) 1471 return -1; 1472 1473 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake", 1474 ie.gtk, ie.gtk_len); 1475 gd->keyidx = ie.gtk[0] & 0x3; 1476 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1477 !!(ie.gtk[0] & BIT(2))); 1478 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1479 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1480 "RSN: Too long GTK in GTK IE (len=%lu)", 1481 (unsigned long) ie.gtk_len - 2); 1482 return -1; 1483 } 1484 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1485 1486 if (ieee80211w_set_keys(sm, &ie) < 0) 1487 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1488 "RSN: Failed to configure IGTK"); 1489 1490 return 0; 1491 } 1492 1493 1494 static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1495 const struct wpa_eapol_key *key, 1496 const u8 *key_data, 1497 size_t key_data_len, u16 key_info, 1498 u16 ver, struct wpa_gtk_data *gd) 1499 { 1500 size_t maxkeylen; 1501 u16 gtk_len; 1502 1503 gtk_len = WPA_GET_BE16(key->key_length); 1504 maxkeylen = key_data_len; 1505 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1506 if (maxkeylen < 8) { 1507 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1508 "WPA: Too short maxkeylen (%lu)", 1509 (unsigned long) maxkeylen); 1510 return -1; 1511 } 1512 maxkeylen -= 8; 1513 } 1514 1515 if (gtk_len > maxkeylen || 1516 wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1517 gtk_len, maxkeylen, 1518 &gd->key_rsc_len, &gd->alg)) 1519 return -1; 1520 1521 gd->gtk_len = gtk_len; 1522 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1523 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1524 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { 1525 #ifdef CONFIG_NO_RC4 1526 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1527 "WPA: RC4 not supported in the build"); 1528 return -1; 1529 #else /* CONFIG_NO_RC4 */ 1530 u8 ek[32]; 1531 if (key_data_len > sizeof(gd->gtk)) { 1532 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1533 "WPA: RC4 key data too long (%lu)", 1534 (unsigned long) key_data_len); 1535 return -1; 1536 } 1537 os_memcpy(ek, key->key_iv, 16); 1538 os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); 1539 os_memcpy(gd->gtk, key_data, key_data_len); 1540 if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { 1541 os_memset(ek, 0, sizeof(ek)); 1542 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1543 "WPA: RC4 failed"); 1544 return -1; 1545 } 1546 os_memset(ek, 0, sizeof(ek)); 1547 #endif /* CONFIG_NO_RC4 */ 1548 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1549 if (maxkeylen % 8) { 1550 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1551 "WPA: Unsupported AES-WRAP len %lu", 1552 (unsigned long) maxkeylen); 1553 return -1; 1554 } 1555 if (maxkeylen > sizeof(gd->gtk)) { 1556 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1557 "WPA: AES-WRAP key data " 1558 "too long (keydatalen=%lu maxkeylen=%lu)", 1559 (unsigned long) key_data_len, 1560 (unsigned long) maxkeylen); 1561 return -1; 1562 } 1563 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8, 1564 key_data, gd->gtk)) { 1565 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1566 "WPA: AES unwrap failed - could not decrypt " 1567 "GTK"); 1568 return -1; 1569 } 1570 } else { 1571 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1572 "WPA: Unsupported key_info type %d", ver); 1573 return -1; 1574 } 1575 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1576 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1577 return 0; 1578 } 1579 1580 1581 static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1582 const struct wpa_eapol_key *key, 1583 int ver, u16 key_info) 1584 { 1585 size_t mic_len, hdrlen, rlen; 1586 struct wpa_eapol_key *reply; 1587 u8 *rbuf, *key_mic; 1588 1589 mic_len = wpa_mic_len(sm->key_mgmt); 1590 hdrlen = sizeof(*reply) + mic_len + 2; 1591 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1592 hdrlen, &rlen, (void *) &reply); 1593 if (rbuf == NULL) 1594 return -1; 1595 1596 reply->type = (sm->proto == WPA_PROTO_RSN || 1597 sm->proto == WPA_PROTO_OSEN) ? 1598 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1599 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1600 key_info |= ver | WPA_KEY_INFO_SECURE; 1601 if (mic_len) 1602 key_info |= WPA_KEY_INFO_MIC; 1603 WPA_PUT_BE16(reply->key_info, key_info); 1604 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1605 WPA_PUT_BE16(reply->key_length, 0); 1606 else 1607 os_memcpy(reply->key_length, key->key_length, 2); 1608 os_memcpy(reply->replay_counter, key->replay_counter, 1609 WPA_REPLAY_COUNTER_LEN); 1610 1611 key_mic = (u8 *) (reply + 1); 1612 WPA_PUT_BE16(key_mic + mic_len, 0); 1613 1614 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1615 return wpa_eapol_key_send(sm, &sm->ptk, ver, sm->bssid, ETH_P_EAPOL, 1616 rbuf, rlen, key_mic); 1617 } 1618 1619 1620 static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1621 const unsigned char *src_addr, 1622 const struct wpa_eapol_key *key, 1623 const u8 *key_data, 1624 size_t key_data_len, u16 ver) 1625 { 1626 u16 key_info; 1627 int rekey, ret; 1628 struct wpa_gtk_data gd; 1629 const u8 *key_rsc; 1630 1631 if (!sm->msg_3_of_4_ok) { 1632 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1633 "WPA: Group Key Handshake started prior to completion of 4-way handshake"); 1634 goto failed; 1635 } 1636 1637 os_memset(&gd, 0, sizeof(gd)); 1638 1639 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1640 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1641 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1642 1643 key_info = WPA_GET_BE16(key->key_info); 1644 1645 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 1646 ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, 1647 key_data_len, key_info, 1648 &gd); 1649 } else { 1650 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, 1651 key_data_len, 1652 key_info, ver, &gd); 1653 } 1654 1655 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1656 1657 if (ret) 1658 goto failed; 1659 1660 key_rsc = key->key_rsc; 1661 if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) 1662 key_rsc = null_rsc; 1663 1664 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0) || 1665 wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0) 1666 goto failed; 1667 os_memset(&gd, 0, sizeof(gd)); 1668 1669 if (rekey) { 1670 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " 1671 "completed with " MACSTR " [GTK=%s]", 1672 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1673 wpa_sm_cancel_auth_timeout(sm); 1674 wpa_sm_set_state(sm, WPA_COMPLETED); 1675 } else { 1676 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1677 key_info & 1678 WPA_KEY_INFO_SECURE); 1679 } 1680 1681 wpa_sm_set_rekey_offload(sm); 1682 1683 return; 1684 1685 failed: 1686 os_memset(&gd, 0, sizeof(gd)); 1687 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1688 } 1689 1690 1691 static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1692 struct wpa_eapol_key *key, 1693 u16 ver, 1694 const u8 *buf, size_t len) 1695 { 1696 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; 1697 int ok = 0; 1698 size_t mic_len = wpa_mic_len(sm->key_mgmt); 1699 1700 os_memcpy(mic, key + 1, mic_len); 1701 if (sm->tptk_set) { 1702 os_memset(key + 1, 0, mic_len); 1703 wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len, sm->key_mgmt, 1704 ver, buf, len, (u8 *) (key + 1)); 1705 if (os_memcmp_const(mic, key + 1, mic_len) != 0) { 1706 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1707 "WPA: Invalid EAPOL-Key MIC " 1708 "when using TPTK - ignoring TPTK"); 1709 } else { 1710 ok = 1; 1711 sm->tptk_set = 0; 1712 sm->ptk_set = 1; 1713 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1714 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 1715 } 1716 } 1717 1718 if (!ok && sm->ptk_set) { 1719 os_memset(key + 1, 0, mic_len); 1720 wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len, sm->key_mgmt, 1721 ver, buf, len, (u8 *) (key + 1)); 1722 if (os_memcmp_const(mic, key + 1, mic_len) != 0) { 1723 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1724 "WPA: Invalid EAPOL-Key MIC - " 1725 "dropping packet"); 1726 return -1; 1727 } 1728 ok = 1; 1729 } 1730 1731 if (!ok) { 1732 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1733 "WPA: Could not verify EAPOL-Key MIC - " 1734 "dropping packet"); 1735 return -1; 1736 } 1737 1738 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1739 WPA_REPLAY_COUNTER_LEN); 1740 sm->rx_replay_counter_set = 1; 1741 return 0; 1742 } 1743 1744 1745 /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ 1746 static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, 1747 struct wpa_eapol_key *key, 1748 size_t mic_len, u16 ver, 1749 u8 *key_data, size_t *key_data_len) 1750 { 1751 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", 1752 key_data, *key_data_len); 1753 if (!sm->ptk_set) { 1754 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1755 "WPA: PTK not available, cannot decrypt EAPOL-Key Key " 1756 "Data"); 1757 return -1; 1758 } 1759 1760 /* Decrypt key data here so that this operation does not need 1761 * to be implemented separately for each message type. */ 1762 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { 1763 #ifdef CONFIG_NO_RC4 1764 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1765 "WPA: RC4 not supported in the build"); 1766 return -1; 1767 #else /* CONFIG_NO_RC4 */ 1768 u8 ek[32]; 1769 os_memcpy(ek, key->key_iv, 16); 1770 os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); 1771 if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { 1772 os_memset(ek, 0, sizeof(ek)); 1773 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1774 "WPA: RC4 failed"); 1775 return -1; 1776 } 1777 os_memset(ek, 0, sizeof(ek)); 1778 #endif /* CONFIG_NO_RC4 */ 1779 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1780 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || 1781 sm->key_mgmt == WPA_KEY_MGMT_OSEN || 1782 wpa_key_mgmt_suite_b(sm->key_mgmt)) { 1783 u8 *buf; 1784 if (*key_data_len < 8 || *key_data_len % 8) { 1785 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1786 "WPA: Unsupported AES-WRAP len %u", 1787 (unsigned int) *key_data_len); 1788 return -1; 1789 } 1790 *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ 1791 buf = os_malloc(*key_data_len); 1792 if (buf == NULL) { 1793 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1794 "WPA: No memory for AES-UNWRAP buffer"); 1795 return -1; 1796 } 1797 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8, 1798 key_data, buf)) { 1799 bin_clear_free(buf, *key_data_len); 1800 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1801 "WPA: AES unwrap failed - " 1802 "could not decrypt EAPOL-Key key data"); 1803 return -1; 1804 } 1805 os_memcpy(key_data, buf, *key_data_len); 1806 bin_clear_free(buf, *key_data_len); 1807 WPA_PUT_BE16(((u8 *) (key + 1)) + mic_len, *key_data_len); 1808 } else { 1809 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1810 "WPA: Unsupported key_info type %d", ver); 1811 return -1; 1812 } 1813 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 1814 key_data, *key_data_len); 1815 return 0; 1816 } 1817 1818 1819 /** 1820 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 1821 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1822 */ 1823 void wpa_sm_aborted_cached(struct wpa_sm *sm) 1824 { 1825 if (sm && sm->cur_pmksa) { 1826 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1827 "RSN: Cancelling PMKSA caching attempt"); 1828 sm->cur_pmksa = NULL; 1829 } 1830 } 1831 1832 1833 static void wpa_eapol_key_dump(struct wpa_sm *sm, 1834 const struct wpa_eapol_key *key, 1835 unsigned int key_data_len, 1836 const u8 *mic, unsigned int mic_len) 1837 { 1838 #ifndef CONFIG_NO_STDOUT_DEBUG 1839 u16 key_info = WPA_GET_BE16(key->key_info); 1840 1841 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 1842 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1843 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 1844 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 1845 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1846 WPA_KEY_INFO_KEY_INDEX_SHIFT, 1847 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 1848 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 1849 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 1850 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 1851 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 1852 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 1853 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 1854 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 1855 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 1856 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1857 " key_length=%u key_data_length=%u", 1858 WPA_GET_BE16(key->key_length), key_data_len); 1859 wpa_hexdump(MSG_DEBUG, " replay_counter", 1860 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 1861 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 1862 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 1863 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 1864 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 1865 wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len); 1866 #endif /* CONFIG_NO_STDOUT_DEBUG */ 1867 } 1868 1869 1870 #ifdef CONFIG_FILS 1871 static int wpa_supp_aead_decrypt(struct wpa_sm *sm, u8 *buf, size_t buf_len, 1872 size_t *key_data_len) 1873 { 1874 struct wpa_ptk *ptk; 1875 struct ieee802_1x_hdr *hdr; 1876 struct wpa_eapol_key *key; 1877 u8 *pos, *tmp; 1878 const u8 *aad[1]; 1879 size_t aad_len[1]; 1880 1881 if (*key_data_len < AES_BLOCK_SIZE) { 1882 wpa_printf(MSG_INFO, "No room for AES-SIV data in the frame"); 1883 return -1; 1884 } 1885 1886 if (sm->tptk_set) 1887 ptk = &sm->tptk; 1888 else if (sm->ptk_set) 1889 ptk = &sm->ptk; 1890 else 1891 return -1; 1892 1893 hdr = (struct ieee802_1x_hdr *) buf; 1894 key = (struct wpa_eapol_key *) (hdr + 1); 1895 pos = (u8 *) (key + 1); 1896 pos += 2; /* Pointing at the Encrypted Key Data field */ 1897 1898 tmp = os_malloc(*key_data_len); 1899 if (!tmp) 1900 return -1; 1901 1902 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to 1903 * to Key Data (exclusive). */ 1904 aad[0] = buf; 1905 aad_len[0] = pos - buf; 1906 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, *key_data_len, 1907 1, aad, aad_len, tmp) < 0) { 1908 wpa_printf(MSG_INFO, "Invalid AES-SIV data in the frame"); 1909 bin_clear_free(tmp, *key_data_len); 1910 return -1; 1911 } 1912 1913 /* AEAD decryption and validation completed successfully */ 1914 (*key_data_len) -= AES_BLOCK_SIZE; 1915 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", 1916 tmp, *key_data_len); 1917 1918 /* Replace Key Data field with the decrypted version */ 1919 os_memcpy(pos, tmp, *key_data_len); 1920 pos -= 2; /* Key Data Length field */ 1921 WPA_PUT_BE16(pos, *key_data_len); 1922 bin_clear_free(tmp, *key_data_len); 1923 1924 if (sm->tptk_set) { 1925 sm->tptk_set = 0; 1926 sm->ptk_set = 1; 1927 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1928 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 1929 } 1930 1931 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1932 WPA_REPLAY_COUNTER_LEN); 1933 sm->rx_replay_counter_set = 1; 1934 1935 return 0; 1936 } 1937 #endif /* CONFIG_FILS */ 1938 1939 1940 /** 1941 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 1942 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1943 * @src_addr: Source MAC address of the EAPOL packet 1944 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 1945 * @len: Length of the EAPOL frame 1946 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 1947 * 1948 * This function is called for each received EAPOL frame. Other than EAPOL-Key 1949 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 1950 * only processing WPA and WPA2 EAPOL-Key frames. 1951 * 1952 * The received EAPOL-Key packets are validated and valid packets are replied 1953 * to. In addition, key material (PTK, GTK) is configured at the end of a 1954 * successful key handshake. 1955 */ 1956 int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 1957 const u8 *buf, size_t len) 1958 { 1959 size_t plen, data_len, key_data_len; 1960 const struct ieee802_1x_hdr *hdr; 1961 struct wpa_eapol_key *key; 1962 u16 key_info, ver; 1963 u8 *tmp = NULL; 1964 int ret = -1; 1965 struct wpa_peerkey *peerkey = NULL; 1966 u8 *mic, *key_data; 1967 size_t mic_len, keyhdrlen; 1968 1969 #ifdef CONFIG_IEEE80211R 1970 sm->ft_completed = 0; 1971 #endif /* CONFIG_IEEE80211R */ 1972 1973 mic_len = wpa_mic_len(sm->key_mgmt); 1974 keyhdrlen = sizeof(*key) + mic_len + 2; 1975 1976 if (len < sizeof(*hdr) + keyhdrlen) { 1977 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1978 "WPA: EAPOL frame too short to be a WPA " 1979 "EAPOL-Key (len %lu, expecting at least %lu)", 1980 (unsigned long) len, 1981 (unsigned long) sizeof(*hdr) + keyhdrlen); 1982 return 0; 1983 } 1984 1985 hdr = (const struct ieee802_1x_hdr *) buf; 1986 plen = be_to_host16(hdr->length); 1987 data_len = plen + sizeof(*hdr); 1988 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1989 "IEEE 802.1X RX: version=%d type=%d length=%lu", 1990 hdr->version, hdr->type, (unsigned long) plen); 1991 1992 if (hdr->version < EAPOL_VERSION) { 1993 /* TODO: backwards compatibility */ 1994 } 1995 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 1996 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1997 "WPA: EAPOL frame (type %u) discarded, " 1998 "not a Key frame", hdr->type); 1999 ret = 0; 2000 goto out; 2001 } 2002 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); 2003 if (plen > len - sizeof(*hdr) || plen < keyhdrlen) { 2004 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2005 "WPA: EAPOL frame payload size %lu " 2006 "invalid (frame size %lu)", 2007 (unsigned long) plen, (unsigned long) len); 2008 ret = 0; 2009 goto out; 2010 } 2011 if (data_len < len) { 2012 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2013 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 2014 (unsigned long) len - data_len); 2015 } 2016 2017 /* 2018 * Make a copy of the frame since we need to modify the buffer during 2019 * MAC validation and Key Data decryption. 2020 */ 2021 tmp = os_malloc(data_len); 2022 if (tmp == NULL) 2023 goto out; 2024 os_memcpy(tmp, buf, data_len); 2025 key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); 2026 mic = (u8 *) (key + 1); 2027 key_data = mic + mic_len + 2; 2028 2029 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) 2030 { 2031 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2032 "WPA: EAPOL-Key type (%d) unknown, discarded", 2033 key->type); 2034 ret = 0; 2035 goto out; 2036 } 2037 2038 key_data_len = WPA_GET_BE16(mic + mic_len); 2039 wpa_eapol_key_dump(sm, key, key_data_len, mic, mic_len); 2040 2041 if (key_data_len > plen - keyhdrlen) { 2042 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 2043 "frame - key_data overflow (%u > %u)", 2044 (unsigned int) key_data_len, 2045 (unsigned int) (plen - keyhdrlen)); 2046 goto out; 2047 } 2048 2049 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 2050 key_info = WPA_GET_BE16(key->key_info); 2051 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 2052 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 2053 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 2054 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 2055 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 2056 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && 2057 !wpa_key_mgmt_suite_b(sm->key_mgmt) && 2058 !wpa_key_mgmt_fils(sm->key_mgmt) && 2059 sm->key_mgmt != WPA_KEY_MGMT_OSEN) { 2060 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2061 "WPA: Unsupported EAPOL-Key descriptor version %d", 2062 ver); 2063 goto out; 2064 } 2065 2066 if (sm->key_mgmt == WPA_KEY_MGMT_OSEN && 2067 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { 2068 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2069 "OSEN: Unsupported EAPOL-Key descriptor version %d", 2070 ver); 2071 goto out; 2072 } 2073 2074 if ((wpa_key_mgmt_suite_b(sm->key_mgmt) || 2075 wpa_key_mgmt_fils(sm->key_mgmt)) && 2076 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { 2077 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2078 "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)", 2079 ver); 2080 goto out; 2081 } 2082 2083 #ifdef CONFIG_IEEE80211R 2084 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 2085 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 2086 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) { 2087 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2088 "FT: AP did not use AES-128-CMAC"); 2089 goto out; 2090 } 2091 } else 2092 #endif /* CONFIG_IEEE80211R */ 2093 #ifdef CONFIG_IEEE80211W 2094 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 2095 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 2096 sm->key_mgmt != WPA_KEY_MGMT_OSEN && 2097 !wpa_key_mgmt_fils(sm->key_mgmt) && 2098 !wpa_key_mgmt_suite_b(sm->key_mgmt)) { 2099 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2100 "WPA: AP did not use the " 2101 "negotiated AES-128-CMAC"); 2102 goto out; 2103 } 2104 } else 2105 #endif /* CONFIG_IEEE80211W */ 2106 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 2107 !wpa_key_mgmt_suite_b(sm->key_mgmt) && 2108 !wpa_key_mgmt_fils(sm->key_mgmt) && 2109 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 2110 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2111 "WPA: CCMP is used, but EAPOL-Key " 2112 "descriptor version (%d) is not 2", ver); 2113 if (sm->group_cipher != WPA_CIPHER_CCMP && 2114 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 2115 /* Earlier versions of IEEE 802.11i did not explicitly 2116 * require version 2 descriptor for all EAPOL-Key 2117 * packets, so allow group keys to use version 1 if 2118 * CCMP is not used for them. */ 2119 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2120 "WPA: Backwards compatibility: allow invalid " 2121 "version for non-CCMP group keys"); 2122 } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { 2123 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2124 "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used"); 2125 } else 2126 goto out; 2127 } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 2128 !wpa_key_mgmt_suite_b(sm->key_mgmt) && 2129 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 2130 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2131 "WPA: GCMP is used, but EAPOL-Key " 2132 "descriptor version (%d) is not 2", ver); 2133 goto out; 2134 } 2135 2136 #ifdef CONFIG_PEERKEY 2137 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 2138 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 2139 break; 2140 } 2141 2142 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) { 2143 if (!peerkey->initiator && peerkey->replay_counter_set && 2144 os_memcmp(key->replay_counter, peerkey->replay_counter, 2145 WPA_REPLAY_COUNTER_LEN) <= 0) { 2146 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2147 "RSN: EAPOL-Key Replay Counter did not " 2148 "increase (STK) - dropping packet"); 2149 goto out; 2150 } else if (peerkey->initiator) { 2151 u8 _tmp[WPA_REPLAY_COUNTER_LEN]; 2152 os_memcpy(_tmp, key->replay_counter, 2153 WPA_REPLAY_COUNTER_LEN); 2154 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN); 2155 if (os_memcmp(_tmp, peerkey->replay_counter, 2156 WPA_REPLAY_COUNTER_LEN) != 0) { 2157 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2158 "RSN: EAPOL-Key Replay " 2159 "Counter did not match (STK) - " 2160 "dropping packet"); 2161 goto out; 2162 } 2163 } 2164 } 2165 2166 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) { 2167 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2168 "RSN: Ack bit in key_info from STK peer"); 2169 goto out; 2170 } 2171 #endif /* CONFIG_PEERKEY */ 2172 2173 if (!peerkey && sm->rx_replay_counter_set && 2174 os_memcmp(key->replay_counter, sm->rx_replay_counter, 2175 WPA_REPLAY_COUNTER_LEN) <= 0) { 2176 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2177 "WPA: EAPOL-Key Replay Counter did not increase - " 2178 "dropping packet"); 2179 goto out; 2180 } 2181 2182 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE)) 2183 #ifdef CONFIG_PEERKEY 2184 && (peerkey == NULL || !peerkey->initiator) 2185 #endif /* CONFIG_PEERKEY */ 2186 ) { 2187 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2188 "WPA: No Ack bit in key_info"); 2189 goto out; 2190 } 2191 2192 if (key_info & WPA_KEY_INFO_REQUEST) { 2193 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2194 "WPA: EAPOL-Key with Request bit - dropped"); 2195 goto out; 2196 } 2197 2198 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey && 2199 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 2200 goto out; 2201 2202 #ifdef CONFIG_PEERKEY 2203 if ((key_info & WPA_KEY_INFO_MIC) && peerkey && 2204 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, 2205 data_len)) 2206 goto out; 2207 #endif /* CONFIG_PEERKEY */ 2208 2209 #ifdef CONFIG_FILS 2210 if (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 2211 if (wpa_supp_aead_decrypt(sm, tmp, data_len, &key_data_len)) 2212 goto out; 2213 } 2214 #endif /* CONFIG_FILS */ 2215 2216 if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && 2217 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && mic_len) { 2218 if (wpa_supplicant_decrypt_key_data(sm, key, mic_len, 2219 ver, key_data, 2220 &key_data_len)) 2221 goto out; 2222 } 2223 2224 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 2225 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 2226 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2227 "WPA: Ignored EAPOL-Key (Pairwise) with " 2228 "non-zero key index"); 2229 goto out; 2230 } 2231 if (peerkey) { 2232 /* PeerKey 4-Way Handshake */ 2233 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver, 2234 key_data, key_data_len); 2235 } else if (key_info & (WPA_KEY_INFO_MIC | 2236 WPA_KEY_INFO_ENCR_KEY_DATA)) { 2237 /* 3/4 4-Way Handshake */ 2238 wpa_supplicant_process_3_of_4(sm, key, ver, key_data, 2239 key_data_len); 2240 } else { 2241 /* 1/4 4-Way Handshake */ 2242 wpa_supplicant_process_1_of_4(sm, src_addr, key, 2243 ver, key_data, 2244 key_data_len); 2245 } 2246 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 2247 /* PeerKey SMK Handshake */ 2248 peerkey_rx_eapol_smk(sm, src_addr, key, key_data, key_data_len, 2249 key_info, ver); 2250 } else { 2251 if ((mic_len && (key_info & WPA_KEY_INFO_MIC)) || 2252 (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA))) { 2253 /* 1/2 Group Key Handshake */ 2254 wpa_supplicant_process_1_of_2(sm, src_addr, key, 2255 key_data, key_data_len, 2256 ver); 2257 } else { 2258 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2259 "WPA: EAPOL-Key (Group) without Mic/Encr bit - " 2260 "dropped"); 2261 } 2262 } 2263 2264 ret = 1; 2265 2266 out: 2267 bin_clear_free(tmp, data_len); 2268 return ret; 2269 } 2270 2271 2272 #ifdef CONFIG_CTRL_IFACE 2273 static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 2274 { 2275 switch (sm->key_mgmt) { 2276 case WPA_KEY_MGMT_IEEE8021X: 2277 return ((sm->proto == WPA_PROTO_RSN || 2278 sm->proto == WPA_PROTO_OSEN) ? 2279 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 2280 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 2281 case WPA_KEY_MGMT_PSK: 2282 return (sm->proto == WPA_PROTO_RSN ? 2283 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 2284 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 2285 #ifdef CONFIG_IEEE80211R 2286 case WPA_KEY_MGMT_FT_IEEE8021X: 2287 return RSN_AUTH_KEY_MGMT_FT_802_1X; 2288 case WPA_KEY_MGMT_FT_PSK: 2289 return RSN_AUTH_KEY_MGMT_FT_PSK; 2290 #endif /* CONFIG_IEEE80211R */ 2291 #ifdef CONFIG_IEEE80211W 2292 case WPA_KEY_MGMT_IEEE8021X_SHA256: 2293 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 2294 case WPA_KEY_MGMT_PSK_SHA256: 2295 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 2296 #endif /* CONFIG_IEEE80211W */ 2297 case WPA_KEY_MGMT_CCKM: 2298 return (sm->proto == WPA_PROTO_RSN ? 2299 RSN_AUTH_KEY_MGMT_CCKM: 2300 WPA_AUTH_KEY_MGMT_CCKM); 2301 case WPA_KEY_MGMT_WPA_NONE: 2302 return WPA_AUTH_KEY_MGMT_NONE; 2303 case WPA_KEY_MGMT_IEEE8021X_SUITE_B: 2304 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; 2305 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 2306 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; 2307 default: 2308 return 0; 2309 } 2310 } 2311 2312 2313 #define RSN_SUITE "%02x-%02x-%02x-%d" 2314 #define RSN_SUITE_ARG(s) \ 2315 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 2316 2317 /** 2318 * wpa_sm_get_mib - Dump text list of MIB entries 2319 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2320 * @buf: Buffer for the list 2321 * @buflen: Length of the buffer 2322 * Returns: Number of bytes written to buffer 2323 * 2324 * This function is used fetch dot11 MIB variables. 2325 */ 2326 int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 2327 { 2328 char pmkid_txt[PMKID_LEN * 2 + 1]; 2329 int rsna, ret; 2330 size_t len; 2331 2332 if (sm->cur_pmksa) { 2333 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 2334 sm->cur_pmksa->pmkid, PMKID_LEN); 2335 } else 2336 pmkid_txt[0] = '\0'; 2337 2338 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 2339 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 2340 sm->proto == WPA_PROTO_RSN) 2341 rsna = 1; 2342 else 2343 rsna = 0; 2344 2345 ret = os_snprintf(buf, buflen, 2346 "dot11RSNAOptionImplemented=TRUE\n" 2347 "dot11RSNAPreauthenticationImplemented=TRUE\n" 2348 "dot11RSNAEnabled=%s\n" 2349 "dot11RSNAPreauthenticationEnabled=%s\n" 2350 "dot11RSNAConfigVersion=%d\n" 2351 "dot11RSNAConfigPairwiseKeysSupported=5\n" 2352 "dot11RSNAConfigGroupCipherSize=%d\n" 2353 "dot11RSNAConfigPMKLifetime=%d\n" 2354 "dot11RSNAConfigPMKReauthThreshold=%d\n" 2355 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 2356 "dot11RSNAConfigSATimeout=%d\n", 2357 rsna ? "TRUE" : "FALSE", 2358 rsna ? "TRUE" : "FALSE", 2359 RSN_VERSION, 2360 wpa_cipher_key_len(sm->group_cipher) * 8, 2361 sm->dot11RSNAConfigPMKLifetime, 2362 sm->dot11RSNAConfigPMKReauthThreshold, 2363 sm->dot11RSNAConfigSATimeout); 2364 if (os_snprintf_error(buflen, ret)) 2365 return 0; 2366 len = ret; 2367 2368 ret = os_snprintf( 2369 buf + len, buflen - len, 2370 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 2371 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 2372 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 2373 "dot11RSNAPMKIDUsed=%s\n" 2374 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 2375 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 2376 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 2377 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 2378 "dot11RSNA4WayHandshakeFailures=%u\n", 2379 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 2380 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2381 sm->pairwise_cipher)), 2382 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2383 sm->group_cipher)), 2384 pmkid_txt, 2385 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 2386 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2387 sm->pairwise_cipher)), 2388 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2389 sm->group_cipher)), 2390 sm->dot11RSNA4WayHandshakeFailures); 2391 if (!os_snprintf_error(buflen - len, ret)) 2392 len += ret; 2393 2394 return (int) len; 2395 } 2396 #endif /* CONFIG_CTRL_IFACE */ 2397 2398 2399 static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 2400 void *ctx, enum pmksa_free_reason reason) 2401 { 2402 struct wpa_sm *sm = ctx; 2403 int deauth = 0; 2404 2405 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " 2406 MACSTR " reason=%d", MAC2STR(entry->aa), reason); 2407 2408 if (sm->cur_pmksa == entry) { 2409 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2410 "RSN: %s current PMKSA entry", 2411 reason == PMKSA_REPLACE ? "replaced" : "removed"); 2412 pmksa_cache_clear_current(sm); 2413 2414 /* 2415 * If an entry is simply being replaced, there's no need to 2416 * deauthenticate because it will be immediately re-added. 2417 * This happens when EAP authentication is completed again 2418 * (reauth or failed PMKSA caching attempt). 2419 */ 2420 if (reason != PMKSA_REPLACE) 2421 deauth = 1; 2422 } 2423 2424 if (reason == PMKSA_EXPIRE && 2425 (sm->pmk_len == entry->pmk_len && 2426 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2427 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2428 "RSN: deauthenticating due to expired PMK"); 2429 pmksa_cache_clear_current(sm); 2430 deauth = 1; 2431 } 2432 2433 if (deauth) { 2434 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2435 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2436 } 2437 } 2438 2439 2440 /** 2441 * wpa_sm_init - Initialize WPA state machine 2442 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2443 * Returns: Pointer to the allocated WPA state machine data 2444 * 2445 * This function is used to allocate a new WPA state machine and the returned 2446 * value is passed to all WPA state machine calls. 2447 */ 2448 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2449 { 2450 struct wpa_sm *sm; 2451 2452 sm = os_zalloc(sizeof(*sm)); 2453 if (sm == NULL) 2454 return NULL; 2455 dl_list_init(&sm->pmksa_candidates); 2456 sm->renew_snonce = 1; 2457 sm->ctx = ctx; 2458 2459 sm->dot11RSNAConfigPMKLifetime = 43200; 2460 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2461 sm->dot11RSNAConfigSATimeout = 60; 2462 2463 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2464 if (sm->pmksa == NULL) { 2465 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2466 "RSN: PMKSA cache initialization failed"); 2467 os_free(sm); 2468 return NULL; 2469 } 2470 2471 return sm; 2472 } 2473 2474 2475 /** 2476 * wpa_sm_deinit - Deinitialize WPA state machine 2477 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2478 */ 2479 void wpa_sm_deinit(struct wpa_sm *sm) 2480 { 2481 if (sm == NULL) 2482 return; 2483 pmksa_cache_deinit(sm->pmksa); 2484 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2485 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2486 os_free(sm->assoc_wpa_ie); 2487 os_free(sm->ap_wpa_ie); 2488 os_free(sm->ap_rsn_ie); 2489 wpa_sm_drop_sa(sm); 2490 os_free(sm->ctx); 2491 peerkey_deinit(sm); 2492 #ifdef CONFIG_IEEE80211R 2493 os_free(sm->assoc_resp_ies); 2494 #endif /* CONFIG_IEEE80211R */ 2495 #ifdef CONFIG_TESTING_OPTIONS 2496 wpabuf_free(sm->test_assoc_ie); 2497 #endif /* CONFIG_TESTING_OPTIONS */ 2498 os_free(sm); 2499 } 2500 2501 2502 /** 2503 * wpa_sm_notify_assoc - Notify WPA state machine about association 2504 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2505 * @bssid: The BSSID of the new association 2506 * 2507 * This function is called to let WPA state machine know that the connection 2508 * was established. 2509 */ 2510 void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2511 { 2512 int clear_keys = 1; 2513 2514 if (sm == NULL) 2515 return; 2516 2517 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2518 "WPA: Association event - clear replay counter"); 2519 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2520 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2521 sm->rx_replay_counter_set = 0; 2522 sm->renew_snonce = 1; 2523 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2524 rsn_preauth_deinit(sm); 2525 2526 #ifdef CONFIG_IEEE80211R 2527 if (wpa_ft_is_completed(sm)) { 2528 /* 2529 * Clear portValid to kick EAPOL state machine to re-enter 2530 * AUTHENTICATED state to get the EAPOL port Authorized. 2531 */ 2532 eapol_sm_notify_portValid(sm->eapol, FALSE); 2533 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2534 2535 /* Prepare for the next transition */ 2536 wpa_ft_prepare_auth_request(sm, NULL); 2537 2538 clear_keys = 0; 2539 } 2540 #endif /* CONFIG_IEEE80211R */ 2541 #ifdef CONFIG_FILS 2542 if (sm->fils_completed) { 2543 /* 2544 * Clear portValid to kick EAPOL state machine to re-enter 2545 * AUTHENTICATED state to get the EAPOL port Authorized. 2546 */ 2547 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2548 clear_keys = 0; 2549 } 2550 #endif /* CONFIG_FILS */ 2551 2552 if (clear_keys) { 2553 /* 2554 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2555 * this is not part of a Fast BSS Transition. 2556 */ 2557 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2558 sm->ptk_set = 0; 2559 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2560 sm->tptk_set = 0; 2561 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2562 os_memset(&sm->gtk, 0, sizeof(sm->gtk)); 2563 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); 2564 #ifdef CONFIG_IEEE80211W 2565 os_memset(&sm->igtk, 0, sizeof(sm->igtk)); 2566 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); 2567 #endif /* CONFIG_IEEE80211W */ 2568 } 2569 2570 #ifdef CONFIG_TDLS 2571 wpa_tdls_assoc(sm); 2572 #endif /* CONFIG_TDLS */ 2573 2574 #ifdef CONFIG_P2P 2575 os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); 2576 #endif /* CONFIG_P2P */ 2577 } 2578 2579 2580 /** 2581 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2582 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2583 * 2584 * This function is called to let WPA state machine know that the connection 2585 * was lost. This will abort any existing pre-authentication session. 2586 */ 2587 void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2588 { 2589 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2590 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2591 peerkey_deinit(sm); 2592 rsn_preauth_deinit(sm); 2593 pmksa_cache_clear_current(sm); 2594 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2595 sm->dot11RSNA4WayHandshakeFailures++; 2596 #ifdef CONFIG_TDLS 2597 wpa_tdls_disassoc(sm); 2598 #endif /* CONFIG_TDLS */ 2599 #ifdef CONFIG_FILS 2600 sm->fils_completed = 0; 2601 #endif /* CONFIG_FILS */ 2602 #ifdef CONFIG_IEEE80211R 2603 sm->ft_reassoc_completed = 0; 2604 #endif /* CONFIG_IEEE80211R */ 2605 2606 /* Keys are not needed in the WPA state machine anymore */ 2607 wpa_sm_drop_sa(sm); 2608 2609 sm->msg_3_of_4_ok = 0; 2610 } 2611 2612 2613 /** 2614 * wpa_sm_set_pmk - Set PMK 2615 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2616 * @pmk: The new PMK 2617 * @pmk_len: The length of the new PMK in bytes 2618 * @pmkid: Calculated PMKID 2619 * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK 2620 * 2621 * Configure the PMK for WPA state machine. 2622 */ 2623 void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, 2624 const u8 *pmkid, const u8 *bssid) 2625 { 2626 if (sm == NULL) 2627 return; 2628 2629 sm->pmk_len = pmk_len; 2630 os_memcpy(sm->pmk, pmk, pmk_len); 2631 2632 #ifdef CONFIG_IEEE80211R 2633 /* Set XXKey to be PSK for FT key derivation */ 2634 sm->xxkey_len = pmk_len; 2635 os_memcpy(sm->xxkey, pmk, pmk_len); 2636 #endif /* CONFIG_IEEE80211R */ 2637 2638 if (bssid) { 2639 pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, 2640 bssid, sm->own_addr, 2641 sm->network_ctx, sm->key_mgmt); 2642 } 2643 } 2644 2645 2646 /** 2647 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2648 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2649 * 2650 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2651 * will be cleared. 2652 */ 2653 void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2654 { 2655 if (sm == NULL) 2656 return; 2657 2658 if (sm->cur_pmksa) { 2659 sm->pmk_len = sm->cur_pmksa->pmk_len; 2660 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2661 } else { 2662 sm->pmk_len = PMK_LEN; 2663 os_memset(sm->pmk, 0, PMK_LEN); 2664 } 2665 } 2666 2667 2668 /** 2669 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2670 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2671 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2672 */ 2673 void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2674 { 2675 if (sm) 2676 sm->fast_reauth = fast_reauth; 2677 } 2678 2679 2680 /** 2681 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2682 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2683 * @scard_ctx: Context pointer for smartcard related callback functions 2684 */ 2685 void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2686 { 2687 if (sm == NULL) 2688 return; 2689 sm->scard_ctx = scard_ctx; 2690 if (sm->preauth_eapol) 2691 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2692 } 2693 2694 2695 /** 2696 * wpa_sm_set_config - Notification of current configration change 2697 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2698 * @config: Pointer to current network configuration 2699 * 2700 * Notify WPA state machine that configuration has changed. config will be 2701 * stored as a backpointer to network configuration. This can be %NULL to clear 2702 * the stored pointed. 2703 */ 2704 void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2705 { 2706 if (!sm) 2707 return; 2708 2709 if (config) { 2710 sm->network_ctx = config->network_ctx; 2711 sm->peerkey_enabled = config->peerkey_enabled; 2712 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2713 sm->proactive_key_caching = config->proactive_key_caching; 2714 sm->eap_workaround = config->eap_workaround; 2715 sm->eap_conf_ctx = config->eap_conf_ctx; 2716 if (config->ssid) { 2717 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2718 sm->ssid_len = config->ssid_len; 2719 } else 2720 sm->ssid_len = 0; 2721 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2722 sm->p2p = config->p2p; 2723 sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation; 2724 } else { 2725 sm->network_ctx = NULL; 2726 sm->peerkey_enabled = 0; 2727 sm->allowed_pairwise_cipher = 0; 2728 sm->proactive_key_caching = 0; 2729 sm->eap_workaround = 0; 2730 sm->eap_conf_ctx = NULL; 2731 sm->ssid_len = 0; 2732 sm->wpa_ptk_rekey = 0; 2733 sm->p2p = 0; 2734 sm->wpa_rsc_relaxation = 0; 2735 } 2736 } 2737 2738 2739 /** 2740 * wpa_sm_set_own_addr - Set own MAC address 2741 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2742 * @addr: Own MAC address 2743 */ 2744 void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2745 { 2746 if (sm) 2747 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2748 } 2749 2750 2751 /** 2752 * wpa_sm_set_ifname - Set network interface name 2753 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2754 * @ifname: Interface name 2755 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2756 */ 2757 void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2758 const char *bridge_ifname) 2759 { 2760 if (sm) { 2761 sm->ifname = ifname; 2762 sm->bridge_ifname = bridge_ifname; 2763 } 2764 } 2765 2766 2767 /** 2768 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2769 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2770 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2771 */ 2772 void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2773 { 2774 if (sm) 2775 sm->eapol = eapol; 2776 } 2777 2778 2779 /** 2780 * wpa_sm_set_param - Set WPA state machine parameters 2781 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2782 * @param: Parameter field 2783 * @value: Parameter value 2784 * Returns: 0 on success, -1 on failure 2785 */ 2786 int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2787 unsigned int value) 2788 { 2789 int ret = 0; 2790 2791 if (sm == NULL) 2792 return -1; 2793 2794 switch (param) { 2795 case RSNA_PMK_LIFETIME: 2796 if (value > 0) 2797 sm->dot11RSNAConfigPMKLifetime = value; 2798 else 2799 ret = -1; 2800 break; 2801 case RSNA_PMK_REAUTH_THRESHOLD: 2802 if (value > 0 && value <= 100) 2803 sm->dot11RSNAConfigPMKReauthThreshold = value; 2804 else 2805 ret = -1; 2806 break; 2807 case RSNA_SA_TIMEOUT: 2808 if (value > 0) 2809 sm->dot11RSNAConfigSATimeout = value; 2810 else 2811 ret = -1; 2812 break; 2813 case WPA_PARAM_PROTO: 2814 sm->proto = value; 2815 break; 2816 case WPA_PARAM_PAIRWISE: 2817 sm->pairwise_cipher = value; 2818 break; 2819 case WPA_PARAM_GROUP: 2820 sm->group_cipher = value; 2821 break; 2822 case WPA_PARAM_KEY_MGMT: 2823 sm->key_mgmt = value; 2824 break; 2825 #ifdef CONFIG_IEEE80211W 2826 case WPA_PARAM_MGMT_GROUP: 2827 sm->mgmt_group_cipher = value; 2828 break; 2829 #endif /* CONFIG_IEEE80211W */ 2830 case WPA_PARAM_RSN_ENABLED: 2831 sm->rsn_enabled = value; 2832 break; 2833 case WPA_PARAM_MFP: 2834 sm->mfp = value; 2835 break; 2836 default: 2837 break; 2838 } 2839 2840 return ret; 2841 } 2842 2843 2844 /** 2845 * wpa_sm_get_status - Get WPA state machine 2846 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2847 * @buf: Buffer for status information 2848 * @buflen: Maximum buffer length 2849 * @verbose: Whether to include verbose status information 2850 * Returns: Number of bytes written to buf. 2851 * 2852 * Query WPA state machine for status information. This function fills in 2853 * a text area with current status information. If the buffer (buf) is not 2854 * large enough, status information will be truncated to fit the buffer. 2855 */ 2856 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 2857 int verbose) 2858 { 2859 char *pos = buf, *end = buf + buflen; 2860 int ret; 2861 2862 ret = os_snprintf(pos, end - pos, 2863 "pairwise_cipher=%s\n" 2864 "group_cipher=%s\n" 2865 "key_mgmt=%s\n", 2866 wpa_cipher_txt(sm->pairwise_cipher), 2867 wpa_cipher_txt(sm->group_cipher), 2868 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 2869 if (os_snprintf_error(end - pos, ret)) 2870 return pos - buf; 2871 pos += ret; 2872 2873 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { 2874 struct wpa_ie_data rsn; 2875 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) 2876 >= 0 && 2877 rsn.capabilities & (WPA_CAPABILITY_MFPR | 2878 WPA_CAPABILITY_MFPC)) { 2879 ret = os_snprintf(pos, end - pos, "pmf=%d\n", 2880 (rsn.capabilities & 2881 WPA_CAPABILITY_MFPR) ? 2 : 1); 2882 if (os_snprintf_error(end - pos, ret)) 2883 return pos - buf; 2884 pos += ret; 2885 } 2886 } 2887 2888 return pos - buf; 2889 } 2890 2891 2892 int wpa_sm_pmf_enabled(struct wpa_sm *sm) 2893 { 2894 struct wpa_ie_data rsn; 2895 2896 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) 2897 return 0; 2898 2899 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && 2900 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) 2901 return 1; 2902 2903 return 0; 2904 } 2905 2906 2907 /** 2908 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration 2909 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2910 * @wpa_ie: Pointer to buffer for WPA/RSN IE 2911 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer 2912 * Returns: 0 on success, -1 on failure 2913 */ 2914 int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, 2915 size_t *wpa_ie_len) 2916 { 2917 int res; 2918 2919 if (sm == NULL) 2920 return -1; 2921 2922 #ifdef CONFIG_TESTING_OPTIONS 2923 if (sm->test_assoc_ie) { 2924 wpa_printf(MSG_DEBUG, 2925 "TESTING: Replace association WPA/RSN IE"); 2926 if (*wpa_ie_len < wpabuf_len(sm->test_assoc_ie)) 2927 return -1; 2928 os_memcpy(wpa_ie, wpabuf_head(sm->test_assoc_ie), 2929 wpabuf_len(sm->test_assoc_ie)); 2930 res = wpabuf_len(sm->test_assoc_ie); 2931 } else 2932 #endif /* CONFIG_TESTING_OPTIONS */ 2933 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); 2934 if (res < 0) 2935 return -1; 2936 *wpa_ie_len = res; 2937 2938 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", 2939 wpa_ie, *wpa_ie_len); 2940 2941 if (sm->assoc_wpa_ie == NULL) { 2942 /* 2943 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets 2944 * the correct version of the IE even if PMKSA caching is 2945 * aborted (which would remove PMKID from IE generation). 2946 */ 2947 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len); 2948 if (sm->assoc_wpa_ie == NULL) 2949 return -1; 2950 2951 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len); 2952 sm->assoc_wpa_ie_len = *wpa_ie_len; 2953 } else { 2954 wpa_hexdump(MSG_DEBUG, 2955 "WPA: Leave previously set WPA IE default", 2956 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); 2957 } 2958 2959 return 0; 2960 } 2961 2962 2963 /** 2964 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq 2965 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2966 * @ie: Pointer to IE data (starting from id) 2967 * @len: IE length 2968 * Returns: 0 on success, -1 on failure 2969 * 2970 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association 2971 * Request frame. The IE will be used to override the default value generated 2972 * with wpa_sm_set_assoc_wpa_ie_default(). 2973 */ 2974 int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 2975 { 2976 if (sm == NULL) 2977 return -1; 2978 2979 os_free(sm->assoc_wpa_ie); 2980 if (ie == NULL || len == 0) { 2981 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2982 "WPA: clearing own WPA/RSN IE"); 2983 sm->assoc_wpa_ie = NULL; 2984 sm->assoc_wpa_ie_len = 0; 2985 } else { 2986 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); 2987 sm->assoc_wpa_ie = os_malloc(len); 2988 if (sm->assoc_wpa_ie == NULL) 2989 return -1; 2990 2991 os_memcpy(sm->assoc_wpa_ie, ie, len); 2992 sm->assoc_wpa_ie_len = len; 2993 } 2994 2995 return 0; 2996 } 2997 2998 2999 /** 3000 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp 3001 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3002 * @ie: Pointer to IE data (starting from id) 3003 * @len: IE length 3004 * Returns: 0 on success, -1 on failure 3005 * 3006 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response 3007 * frame. 3008 */ 3009 int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 3010 { 3011 if (sm == NULL) 3012 return -1; 3013 3014 os_free(sm->ap_wpa_ie); 3015 if (ie == NULL || len == 0) { 3016 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 3017 "WPA: clearing AP WPA IE"); 3018 sm->ap_wpa_ie = NULL; 3019 sm->ap_wpa_ie_len = 0; 3020 } else { 3021 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); 3022 sm->ap_wpa_ie = os_malloc(len); 3023 if (sm->ap_wpa_ie == NULL) 3024 return -1; 3025 3026 os_memcpy(sm->ap_wpa_ie, ie, len); 3027 sm->ap_wpa_ie_len = len; 3028 } 3029 3030 return 0; 3031 } 3032 3033 3034 /** 3035 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp 3036 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3037 * @ie: Pointer to IE data (starting from id) 3038 * @len: IE length 3039 * Returns: 0 on success, -1 on failure 3040 * 3041 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response 3042 * frame. 3043 */ 3044 int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 3045 { 3046 if (sm == NULL) 3047 return -1; 3048 3049 os_free(sm->ap_rsn_ie); 3050 if (ie == NULL || len == 0) { 3051 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 3052 "WPA: clearing AP RSN IE"); 3053 sm->ap_rsn_ie = NULL; 3054 sm->ap_rsn_ie_len = 0; 3055 } else { 3056 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); 3057 sm->ap_rsn_ie = os_malloc(len); 3058 if (sm->ap_rsn_ie == NULL) 3059 return -1; 3060 3061 os_memcpy(sm->ap_rsn_ie, ie, len); 3062 sm->ap_rsn_ie_len = len; 3063 } 3064 3065 return 0; 3066 } 3067 3068 3069 /** 3070 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE 3071 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3072 * @data: Pointer to data area for parsing results 3073 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure 3074 * 3075 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the 3076 * parsed data into data. 3077 */ 3078 int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) 3079 { 3080 if (sm == NULL) 3081 return -1; 3082 3083 if (sm->assoc_wpa_ie == NULL) { 3084 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 3085 "WPA: No WPA/RSN IE available from association info"); 3086 return -1; 3087 } 3088 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) 3089 return -2; 3090 return 0; 3091 } 3092 3093 3094 int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) 3095 { 3096 return pmksa_cache_list(sm->pmksa, buf, len); 3097 } 3098 3099 3100 struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm) 3101 { 3102 return pmksa_cache_head(sm->pmksa); 3103 } 3104 3105 3106 struct rsn_pmksa_cache_entry * 3107 wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm, 3108 struct rsn_pmksa_cache_entry * entry) 3109 { 3110 return pmksa_cache_add_entry(sm->pmksa, entry); 3111 } 3112 3113 3114 void wpa_sm_drop_sa(struct wpa_sm *sm) 3115 { 3116 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 3117 sm->ptk_set = 0; 3118 sm->tptk_set = 0; 3119 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 3120 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 3121 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 3122 os_memset(&sm->gtk, 0, sizeof(sm->gtk)); 3123 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); 3124 #ifdef CONFIG_IEEE80211W 3125 os_memset(&sm->igtk, 0, sizeof(sm->igtk)); 3126 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); 3127 #endif /* CONFIG_IEEE80211W */ 3128 #ifdef CONFIG_IEEE80211R 3129 os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); 3130 os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0)); 3131 os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1)); 3132 #endif /* CONFIG_IEEE80211R */ 3133 } 3134 3135 3136 int wpa_sm_has_ptk(struct wpa_sm *sm) 3137 { 3138 if (sm == NULL) 3139 return 0; 3140 return sm->ptk_set; 3141 } 3142 3143 3144 void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 3145 { 3146 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 3147 } 3148 3149 3150 void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 3151 { 3152 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); 3153 } 3154 3155 3156 #ifdef CONFIG_WNM 3157 int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 3158 { 3159 u16 keyinfo; 3160 u8 keylen; /* plaintext key len */ 3161 u8 *key_rsc; 3162 3163 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 3164 struct wpa_gtk_data gd; 3165 3166 os_memset(&gd, 0, sizeof(gd)); 3167 keylen = wpa_cipher_key_len(sm->group_cipher); 3168 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); 3169 gd.alg = wpa_cipher_to_alg(sm->group_cipher); 3170 if (gd.alg == WPA_ALG_NONE) { 3171 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 3172 return -1; 3173 } 3174 3175 key_rsc = buf + 5; 3176 keyinfo = WPA_GET_LE16(buf + 2); 3177 gd.gtk_len = keylen; 3178 if (gd.gtk_len != buf[4]) { 3179 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 3180 gd.gtk_len, buf[4]); 3181 return -1; 3182 } 3183 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 3184 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 3185 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 3186 3187 os_memcpy(gd.gtk, buf + 13, gd.gtk_len); 3188 3189 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 3190 gd.gtk, gd.gtk_len); 3191 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 1)) { 3192 os_memset(&gd, 0, sizeof(gd)); 3193 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 3194 "WNM mode"); 3195 return -1; 3196 } 3197 os_memset(&gd, 0, sizeof(gd)); 3198 #ifdef CONFIG_IEEE80211W 3199 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 3200 const struct wpa_igtk_kde *igtk; 3201 3202 igtk = (const struct wpa_igtk_kde *) (buf + 2); 3203 if (wpa_supplicant_install_igtk(sm, igtk, 1) < 0) 3204 return -1; 3205 #endif /* CONFIG_IEEE80211W */ 3206 } else { 3207 wpa_printf(MSG_DEBUG, "Unknown element id"); 3208 return -1; 3209 } 3210 3211 return 0; 3212 } 3213 #endif /* CONFIG_WNM */ 3214 3215 3216 #ifdef CONFIG_PEERKEY 3217 int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr, 3218 const u8 *buf, size_t len) 3219 { 3220 struct wpa_peerkey *peerkey; 3221 3222 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) { 3223 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0) 3224 break; 3225 } 3226 3227 if (!peerkey) 3228 return 0; 3229 3230 wpa_sm_rx_eapol(sm, src_addr, buf, len); 3231 3232 return 1; 3233 } 3234 #endif /* CONFIG_PEERKEY */ 3235 3236 3237 #ifdef CONFIG_P2P 3238 3239 int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) 3240 { 3241 if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) 3242 return -1; 3243 os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); 3244 return 0; 3245 } 3246 3247 #endif /* CONFIG_P2P */ 3248 3249 3250 void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter) 3251 { 3252 if (rx_replay_counter == NULL) 3253 return; 3254 3255 os_memcpy(sm->rx_replay_counter, rx_replay_counter, 3256 WPA_REPLAY_COUNTER_LEN); 3257 sm->rx_replay_counter_set = 1; 3258 wpa_printf(MSG_DEBUG, "Updated key replay counter"); 3259 } 3260 3261 3262 void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm, 3263 const u8 *ptk_kck, size_t ptk_kck_len, 3264 const u8 *ptk_kek, size_t ptk_kek_len) 3265 { 3266 if (ptk_kck && ptk_kck_len <= WPA_KCK_MAX_LEN) { 3267 os_memcpy(sm->ptk.kck, ptk_kck, ptk_kck_len); 3268 sm->ptk.kck_len = ptk_kck_len; 3269 wpa_printf(MSG_DEBUG, "Updated PTK KCK"); 3270 } 3271 if (ptk_kek && ptk_kek_len <= WPA_KEK_MAX_LEN) { 3272 os_memcpy(sm->ptk.kek, ptk_kek, ptk_kek_len); 3273 sm->ptk.kek_len = ptk_kek_len; 3274 wpa_printf(MSG_DEBUG, "Updated PTK KEK"); 3275 } 3276 sm->ptk_set = 1; 3277 } 3278 3279 3280 #ifdef CONFIG_TESTING_OPTIONS 3281 void wpa_sm_set_test_assoc_ie(struct wpa_sm *sm, struct wpabuf *buf) 3282 { 3283 wpabuf_free(sm->test_assoc_ie); 3284 sm->test_assoc_ie = buf; 3285 } 3286 #endif /* CONFIG_TESTING_OPTIONS */ 3287 3288 3289 #ifdef CONFIG_FILS 3290 3291 struct wpabuf * fils_build_auth(struct wpa_sm *sm) 3292 { 3293 struct wpabuf *buf = NULL; 3294 struct wpabuf *erp_msg; 3295 3296 erp_msg = eapol_sm_build_erp_reauth_start(sm->eapol); 3297 if (!erp_msg && !sm->cur_pmksa) { 3298 wpa_printf(MSG_DEBUG, 3299 "FILS: Neither ERP EAP-Initiate/Re-auth nor PMKSA cache entry is available - skip FILS"); 3300 goto fail; 3301 } 3302 3303 wpa_printf(MSG_DEBUG, "FILS: Try to use FILS (erp=%d pmksa_cache=%d)", 3304 erp_msg != NULL, sm->cur_pmksa != NULL); 3305 3306 sm->fils_completed = 0; 3307 3308 if (!sm->assoc_wpa_ie) { 3309 wpa_printf(MSG_INFO, "FILS: No own RSN IE set for FILS"); 3310 goto fail; 3311 } 3312 3313 if (random_get_bytes(sm->fils_nonce, FILS_NONCE_LEN) < 0 || 3314 random_get_bytes(sm->fils_session, FILS_SESSION_LEN) < 0) 3315 goto fail; 3316 3317 wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Nonce", 3318 sm->fils_nonce, FILS_NONCE_LEN); 3319 wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Session", 3320 sm->fils_session, FILS_SESSION_LEN); 3321 3322 buf = wpabuf_alloc(1000 + sm->assoc_wpa_ie_len); 3323 if (!buf) 3324 goto fail; 3325 3326 /* Fields following the Authentication algorithm number field */ 3327 3328 /* Authentication Transaction seq# */ 3329 wpabuf_put_le16(buf, 1); 3330 3331 /* Status Code */ 3332 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); 3333 3334 /* TODO: Finite Cyclic Group when using PK or PFS */ 3335 /* TODO: Element when using PK or PFS */ 3336 3337 /* RSNE */ 3338 wpa_hexdump(MSG_DEBUG, "FILS: RSNE in FILS Authentication frame", 3339 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); 3340 wpabuf_put_data(buf, sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); 3341 3342 /* TODO: MDE when using FILS for FT initial association */ 3343 /* TODO: FTE when using FILS for FT initial association */ 3344 3345 /* FILS Nonce */ 3346 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3347 wpabuf_put_u8(buf, 1 + FILS_NONCE_LEN); /* Length */ 3348 /* Element ID Extension */ 3349 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_NONCE); 3350 wpabuf_put_data(buf, sm->fils_nonce, FILS_NONCE_LEN); 3351 3352 /* FILS Session */ 3353 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3354 wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ 3355 /* Element ID Extension */ 3356 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); 3357 wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); 3358 3359 /* FILS Wrapped Data */ 3360 sm->fils_erp_pmkid_set = 0; 3361 if (erp_msg) { 3362 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3363 wpabuf_put_u8(buf, 1 + wpabuf_len(erp_msg)); /* Length */ 3364 /* Element ID Extension */ 3365 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_WRAPPED_DATA); 3366 wpabuf_put_buf(buf, erp_msg); 3367 /* Calculate pending PMKID here so that we do not need to 3368 * maintain a copy of the EAP-Initiate/Reauth message. */ 3369 if (fils_pmkid_erp(sm->key_mgmt, wpabuf_head(erp_msg), 3370 wpabuf_len(erp_msg), 3371 sm->fils_erp_pmkid) == 0) 3372 sm->fils_erp_pmkid_set = 1; 3373 } 3374 3375 wpa_hexdump_buf(MSG_DEBUG, "RSN: FILS fields for Authentication frame", 3376 buf); 3377 3378 fail: 3379 wpabuf_free(erp_msg); 3380 return buf; 3381 } 3382 3383 3384 int fils_process_auth(struct wpa_sm *sm, const u8 *data, size_t len) 3385 { 3386 const u8 *pos, *end; 3387 struct ieee802_11_elems elems; 3388 struct wpa_ie_data rsn; 3389 int pmkid_match = 0; 3390 u8 ick[FILS_ICK_MAX_LEN]; 3391 size_t ick_len; 3392 int res; 3393 3394 wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields", 3395 data, len); 3396 pos = data; 3397 end = data + len; 3398 3399 /* TODO: Finite Cyclic Group when using PK or PFS */ 3400 /* TODO: Element when using PK or PFS */ 3401 3402 wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos); 3403 if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) { 3404 wpa_printf(MSG_DEBUG, "FILS: Could not parse elements"); 3405 return -1; 3406 } 3407 3408 /* RSNE */ 3409 wpa_hexdump(MSG_DEBUG, "FILS: RSN element", elems.rsn_ie, 3410 elems.rsn_ie_len); 3411 if (!elems.rsn_ie || 3412 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, 3413 &rsn) < 0) { 3414 wpa_printf(MSG_DEBUG, "FILS: No RSN element"); 3415 return -1; 3416 } 3417 3418 if (!elems.fils_nonce) { 3419 wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field"); 3420 return -1; 3421 } 3422 os_memcpy(sm->fils_anonce, elems.fils_nonce, FILS_NONCE_LEN); 3423 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", sm->fils_anonce, FILS_NONCE_LEN); 3424 3425 /* TODO: MDE when using FILS+FT */ 3426 /* TODO: FTE when using FILS+FT */ 3427 3428 /* PMKID List */ 3429 if (rsn.pmkid && rsn.num_pmkid > 0) { 3430 wpa_hexdump(MSG_DEBUG, "FILS: PMKID List", 3431 rsn.pmkid, rsn.num_pmkid * PMKID_LEN); 3432 3433 if (rsn.num_pmkid != 1) { 3434 wpa_printf(MSG_DEBUG, "FILS: Invalid PMKID selection"); 3435 return -1; 3436 } 3437 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", rsn.pmkid, PMKID_LEN); 3438 if (os_memcmp(sm->cur_pmksa->pmkid, rsn.pmkid, PMKID_LEN) != 0) 3439 { 3440 wpa_printf(MSG_DEBUG, "FILS: PMKID mismatch"); 3441 wpa_hexdump(MSG_DEBUG, "FILS: Expected PMKID", 3442 sm->cur_pmksa->pmkid, PMKID_LEN); 3443 return -1; 3444 } 3445 wpa_printf(MSG_DEBUG, 3446 "FILS: Matching PMKID - continue using PMKSA caching"); 3447 pmkid_match = 1; 3448 } 3449 if (!pmkid_match && sm->cur_pmksa) { 3450 wpa_printf(MSG_DEBUG, 3451 "FILS: No PMKID match - cannot use cached PMKSA entry"); 3452 sm->cur_pmksa = NULL; 3453 } 3454 3455 /* FILS Session */ 3456 if (!elems.fils_session) { 3457 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); 3458 return -1; 3459 } 3460 wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session, 3461 FILS_SESSION_LEN); 3462 if (os_memcmp(sm->fils_session, elems.fils_session, FILS_SESSION_LEN) 3463 != 0) { 3464 wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); 3465 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", 3466 sm->fils_session, FILS_SESSION_LEN); 3467 return -1; 3468 } 3469 3470 /* FILS Wrapped Data */ 3471 if (!sm->cur_pmksa && elems.fils_wrapped_data) { 3472 u8 rmsk[ERP_MAX_KEY_LEN]; 3473 size_t rmsk_len; 3474 3475 wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data", 3476 elems.fils_wrapped_data, 3477 elems.fils_wrapped_data_len); 3478 eapol_sm_process_erp_finish(sm->eapol, elems.fils_wrapped_data, 3479 elems.fils_wrapped_data_len); 3480 if (eapol_sm_failed(sm->eapol)) 3481 return -1; 3482 3483 rmsk_len = ERP_MAX_KEY_LEN; 3484 res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); 3485 if (res == PMK_LEN) { 3486 rmsk_len = PMK_LEN; 3487 res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); 3488 } 3489 if (res) 3490 return -1; 3491 3492 res = fils_rmsk_to_pmk(sm->key_mgmt, rmsk, rmsk_len, 3493 sm->fils_nonce, sm->fils_anonce, NULL, 0, 3494 sm->pmk, &sm->pmk_len); 3495 os_memset(rmsk, 0, sizeof(rmsk)); 3496 if (res) 3497 return -1; 3498 3499 if (!sm->fils_erp_pmkid_set) { 3500 wpa_printf(MSG_DEBUG, "FILS: PMKID not available"); 3501 return -1; 3502 } 3503 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", sm->fils_erp_pmkid, 3504 PMKID_LEN); 3505 wpa_printf(MSG_DEBUG, "FILS: ERP processing succeeded - add PMKSA cache entry for the result"); 3506 sm->cur_pmksa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, 3507 sm->fils_erp_pmkid, NULL, 0, 3508 sm->bssid, sm->own_addr, 3509 sm->network_ctx, sm->key_mgmt); 3510 } 3511 3512 if (!sm->cur_pmksa) { 3513 wpa_printf(MSG_DEBUG, 3514 "FILS: No remaining options to continue FILS authentication"); 3515 return -1; 3516 } 3517 3518 if (fils_pmk_to_ptk(sm->pmk, sm->pmk_len, sm->own_addr, sm->bssid, 3519 sm->fils_nonce, sm->fils_anonce, &sm->ptk, 3520 ick, &ick_len, sm->key_mgmt, sm->pairwise_cipher) < 3521 0) { 3522 wpa_printf(MSG_DEBUG, "FILS: Failed to derive PTK"); 3523 return -1; 3524 } 3525 sm->ptk_set = 1; 3526 sm->tptk_set = 0; 3527 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 3528 3529 res = fils_key_auth_sk(ick, ick_len, sm->fils_nonce, 3530 sm->fils_anonce, sm->own_addr, sm->bssid, 3531 NULL, 0, NULL, 0, /* TODO: SK+PFS */ 3532 sm->key_mgmt, sm->fils_key_auth_sta, 3533 sm->fils_key_auth_ap, 3534 &sm->fils_key_auth_len); 3535 os_memset(ick, 0, sizeof(ick)); 3536 return res; 3537 } 3538 3539 3540 struct wpabuf * fils_build_assoc_req(struct wpa_sm *sm, const u8 **kek, 3541 size_t *kek_len, const u8 **snonce, 3542 const u8 **anonce, 3543 const struct wpabuf **hlp, 3544 unsigned int num_hlp) 3545 { 3546 struct wpabuf *buf; 3547 size_t len; 3548 unsigned int i; 3549 3550 len = 1000; 3551 for (i = 0; hlp && i < num_hlp; i++) 3552 len += 10 + wpabuf_len(hlp[i]); 3553 buf = wpabuf_alloc(len); 3554 if (!buf) 3555 return NULL; 3556 3557 /* FILS Session */ 3558 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3559 wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ 3560 /* Element ID Extension */ 3561 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); 3562 wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); 3563 3564 /* Everything after FILS Session element gets encrypted in the driver 3565 * with KEK. The buffer returned from here is the plaintext version. */ 3566 3567 /* TODO: FILS Public Key */ 3568 3569 /* FILS Key Confirm */ 3570 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3571 wpabuf_put_u8(buf, 1 + sm->fils_key_auth_len); /* Length */ 3572 /* Element ID Extension */ 3573 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_KEY_CONFIRM); 3574 wpabuf_put_data(buf, sm->fils_key_auth_sta, sm->fils_key_auth_len); 3575 3576 /* FILS HLP Container */ 3577 for (i = 0; hlp && i < num_hlp; i++) { 3578 const u8 *pos = wpabuf_head(hlp[i]); 3579 size_t left = wpabuf_len(hlp[i]); 3580 3581 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3582 if (left <= 254) 3583 len = 1 + left; 3584 else 3585 len = 255; 3586 wpabuf_put_u8(buf, len); /* Length */ 3587 /* Element ID Extension */ 3588 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_HLP_CONTAINER); 3589 /* Destination MAC Address, Source MAC Address, HLP Packet. 3590 * HLP Packet is in MSDU format (i.e., included the LLC/SNAP 3591 * header when LPD is used). */ 3592 wpabuf_put_data(buf, pos, len - 1); 3593 pos += len - 1; 3594 left -= len - 1; 3595 while (left) { 3596 wpabuf_put_u8(buf, WLAN_EID_FRAGMENT); 3597 len = left > 255 ? 255 : left; 3598 wpabuf_put_u8(buf, len); 3599 wpabuf_put_data(buf, pos, len); 3600 pos += len; 3601 left -= len; 3602 } 3603 } 3604 3605 /* TODO: FILS IP Address Assignment */ 3606 3607 wpa_hexdump_buf(MSG_DEBUG, "FILS: Association Request plaintext", buf); 3608 3609 *kek = sm->ptk.kek; 3610 *kek_len = sm->ptk.kek_len; 3611 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK for AEAD", *kek, *kek_len); 3612 *snonce = sm->fils_nonce; 3613 wpa_hexdump(MSG_DEBUG, "FILS: SNonce for AEAD AAD", 3614 *snonce, FILS_NONCE_LEN); 3615 *anonce = sm->fils_anonce; 3616 wpa_hexdump(MSG_DEBUG, "FILS: ANonce for AEAD AAD", 3617 *anonce, FILS_NONCE_LEN); 3618 3619 return buf; 3620 } 3621 3622 3623 static void fils_process_hlp_resp(struct wpa_sm *sm, const u8 *resp, size_t len) 3624 { 3625 const u8 *pos, *end; 3626 3627 wpa_hexdump(MSG_MSGDUMP, "FILS: HLP response", resp, len); 3628 if (len < 2 * ETH_ALEN) 3629 return; 3630 pos = resp + 2 * ETH_ALEN; 3631 end = resp + len; 3632 if (end - pos >= 6 && 3633 os_memcmp(pos, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) 3634 pos += 6; /* Remove SNAP/LLC header */ 3635 wpa_sm_fils_hlp_rx(sm, resp, resp + ETH_ALEN, pos, end - pos); 3636 } 3637 3638 3639 static void fils_process_hlp_container(struct wpa_sm *sm, const u8 *pos, 3640 size_t len) 3641 { 3642 const u8 *end = pos + len; 3643 u8 *tmp, *tmp_pos; 3644 3645 /* Check if there are any FILS HLP Container elements */ 3646 while (end - pos >= 2) { 3647 if (2 + pos[1] > end - pos) 3648 return; 3649 if (pos[0] == WLAN_EID_EXTENSION && 3650 pos[1] >= 1 + 2 * ETH_ALEN && 3651 pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER) 3652 break; 3653 pos += 2 + pos[1]; 3654 } 3655 if (end - pos < 2) 3656 return; /* No FILS HLP Container elements */ 3657 3658 tmp = os_malloc(end - pos); 3659 if (!tmp) 3660 return; 3661 3662 while (end - pos >= 2) { 3663 if (2 + pos[1] > end - pos || 3664 pos[0] != WLAN_EID_EXTENSION || 3665 pos[1] < 1 + 2 * ETH_ALEN || 3666 pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER) 3667 break; 3668 tmp_pos = tmp; 3669 os_memcpy(tmp_pos, pos + 3, pos[1] - 1); 3670 tmp_pos += pos[1] - 1; 3671 pos += 2 + pos[1]; 3672 3673 /* Add possible fragments */ 3674 while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT && 3675 2 + pos[1] <= end - pos) { 3676 os_memcpy(tmp_pos, pos + 2, pos[1]); 3677 tmp_pos += pos[1]; 3678 pos += 2 + pos[1]; 3679 } 3680 3681 fils_process_hlp_resp(sm, tmp, tmp_pos - tmp); 3682 } 3683 3684 os_free(tmp); 3685 } 3686 3687 3688 int fils_process_assoc_resp(struct wpa_sm *sm, const u8 *resp, size_t len) 3689 { 3690 const struct ieee80211_mgmt *mgmt; 3691 const u8 *end, *ie_start; 3692 struct ieee802_11_elems elems; 3693 int keylen, rsclen; 3694 enum wpa_alg alg; 3695 struct wpa_gtk_data gd; 3696 int maxkeylen; 3697 struct wpa_eapol_ie_parse kde; 3698 3699 if (!sm || !sm->ptk_set) { 3700 wpa_printf(MSG_DEBUG, "FILS: No KEK available"); 3701 return -1; 3702 } 3703 3704 if (!wpa_key_mgmt_fils(sm->key_mgmt)) { 3705 wpa_printf(MSG_DEBUG, "FILS: Not a FILS AKM"); 3706 return -1; 3707 } 3708 3709 wpa_hexdump(MSG_DEBUG, "FILS: (Re)Association Response frame", 3710 resp, len); 3711 3712 mgmt = (const struct ieee80211_mgmt *) resp; 3713 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_resp)) 3714 return -1; 3715 3716 end = resp + len; 3717 /* Same offset for Association Response and Reassociation Response */ 3718 ie_start = mgmt->u.assoc_resp.variable; 3719 3720 if (ieee802_11_parse_elems(ie_start, end - ie_start, &elems, 1) == 3721 ParseFailed) { 3722 wpa_printf(MSG_DEBUG, 3723 "FILS: Failed to parse decrypted elements"); 3724 goto fail; 3725 } 3726 3727 if (!elems.fils_session) { 3728 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); 3729 return -1; 3730 } 3731 if (os_memcmp(elems.fils_session, sm->fils_session, 3732 FILS_SESSION_LEN) != 0) { 3733 wpa_printf(MSG_DEBUG, "FILS: FILS Session mismatch"); 3734 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", 3735 elems.fils_session, FILS_SESSION_LEN); 3736 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", 3737 sm->fils_session, FILS_SESSION_LEN); 3738 } 3739 3740 /* TODO: FILS Public Key */ 3741 3742 if (!elems.fils_key_confirm) { 3743 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); 3744 goto fail; 3745 } 3746 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { 3747 wpa_printf(MSG_DEBUG, 3748 "FILS: Unexpected Key-Auth length %d (expected %d)", 3749 elems.fils_key_confirm_len, 3750 (int) sm->fils_key_auth_len); 3751 goto fail; 3752 } 3753 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_ap, 3754 sm->fils_key_auth_len) != 0) { 3755 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); 3756 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", 3757 elems.fils_key_confirm, 3758 elems.fils_key_confirm_len); 3759 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", 3760 sm->fils_key_auth_ap, sm->fils_key_auth_len); 3761 goto fail; 3762 } 3763 3764 /* Key Delivery */ 3765 if (!elems.key_delivery) { 3766 wpa_printf(MSG_DEBUG, "FILS: No Key Delivery element"); 3767 goto fail; 3768 } 3769 3770 /* Parse GTK and set the key to the driver */ 3771 os_memset(&gd, 0, sizeof(gd)); 3772 if (wpa_supplicant_parse_ies(elems.key_delivery + WPA_KEY_RSC_LEN, 3773 elems.key_delivery_len - WPA_KEY_RSC_LEN, 3774 &kde) < 0) { 3775 wpa_printf(MSG_DEBUG, "FILS: Failed to parse KDEs"); 3776 goto fail; 3777 } 3778 if (!kde.gtk) { 3779 wpa_printf(MSG_DEBUG, "FILS: No GTK KDE"); 3780 goto fail; 3781 } 3782 maxkeylen = gd.gtk_len = kde.gtk_len - 2; 3783 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 3784 gd.gtk_len, maxkeylen, 3785 &gd.key_rsc_len, &gd.alg)) 3786 goto fail; 3787 3788 wpa_hexdump_key(MSG_DEBUG, "FILS: Received GTK", kde.gtk, kde.gtk_len); 3789 gd.keyidx = kde.gtk[0] & 0x3; 3790 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 3791 !!(kde.gtk[0] & BIT(2))); 3792 if (kde.gtk_len - 2 > sizeof(gd.gtk)) { 3793 wpa_printf(MSG_DEBUG, "FILS: Too long GTK in GTK KDE (len=%lu)", 3794 (unsigned long) kde.gtk_len - 2); 3795 goto fail; 3796 } 3797 os_memcpy(gd.gtk, kde.gtk + 2, kde.gtk_len - 2); 3798 3799 wpa_printf(MSG_DEBUG, "FILS: Set GTK to driver"); 3800 if (wpa_supplicant_install_gtk(sm, &gd, elems.key_delivery) < 0) { 3801 wpa_printf(MSG_DEBUG, "FILS: Failed to set GTK"); 3802 goto fail; 3803 } 3804 3805 if (ieee80211w_set_keys(sm, &kde) < 0) { 3806 wpa_printf(MSG_DEBUG, "FILS: Failed to set IGTK"); 3807 goto fail; 3808 } 3809 3810 alg = wpa_cipher_to_alg(sm->pairwise_cipher); 3811 keylen = wpa_cipher_key_len(sm->pairwise_cipher); 3812 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); 3813 wpa_hexdump_key(MSG_DEBUG, "FILS: Set TK to driver", 3814 sm->ptk.tk, keylen); 3815 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, null_rsc, rsclen, 3816 sm->ptk.tk, keylen) < 0) { 3817 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 3818 "FILS: Failed to set PTK to the driver (alg=%d keylen=%d bssid=" 3819 MACSTR ")", 3820 alg, keylen, MAC2STR(sm->bssid)); 3821 goto fail; 3822 } 3823 3824 /* TODO: TK could be cleared after auth frame exchange now that driver 3825 * takes care of association frame encryption/decryption. */ 3826 /* TK is not needed anymore in supplicant */ 3827 os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); 3828 sm->ptk.installed = 1; 3829 3830 /* FILS HLP Container */ 3831 fils_process_hlp_container(sm, ie_start, end - ie_start); 3832 3833 /* TODO: FILS IP Address Assignment */ 3834 3835 wpa_printf(MSG_DEBUG, "FILS: Auth+Assoc completed successfully"); 3836 sm->fils_completed = 1; 3837 3838 return 0; 3839 fail: 3840 return -1; 3841 } 3842 3843 #endif /* CONFIG_FILS */ 3844 3845 3846 int wpa_fils_is_completed(struct wpa_sm *sm) 3847 { 3848 #ifdef CONFIG_FILS 3849 return sm && sm->fils_completed; 3850 #else /* CONFIG_FILS */ 3851 return 0; 3852 #endif /* CONFIG_FILS */ 3853 } 3854
