1 /* 2 * WPA Supplicant - WPA state machine and EAPOL-Key processing 3 * Copyright (c) 2003-2018, Jouni Malinen <j@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 "crypto/sha256.h" 19 #include "crypto/sha384.h" 20 #include "crypto/sha512.h" 21 #include "common/ieee802_11_defs.h" 22 #include "common/ieee802_11_common.h" 23 #include "common/ocv.h" 24 #include "eap_common/eap_defs.h" 25 #include "eapol_supp/eapol_supp_sm.h" 26 #include "drivers/driver.h" 27 #include "wpa.h" 28 #include "eloop.h" 29 #include "preauth.h" 30 #include "pmksa_cache.h" 31 #include "wpa_i.h" 32 #include "wpa_ie.h" 33 34 35 static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 36 37 38 /** 39 * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message 40 * @sm: Pointer to WPA state machine data from wpa_sm_init() 41 * @ptk: PTK for Key Confirmation/Encryption Key 42 * @ver: Version field from Key Info 43 * @dest: Destination address for the frame 44 * @proto: Ethertype (usually ETH_P_EAPOL) 45 * @msg: EAPOL-Key message 46 * @msg_len: Length of message 47 * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written 48 * Returns: >= 0 on success, < 0 on failure 49 */ 50 int wpa_eapol_key_send(struct wpa_sm *sm, struct wpa_ptk *ptk, 51 int ver, const u8 *dest, u16 proto, 52 u8 *msg, size_t msg_len, u8 *key_mic) 53 { 54 int ret = -1; 55 size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); 56 57 wpa_printf(MSG_DEBUG, "WPA: Send EAPOL-Key frame to " MACSTR 58 " ver=%d mic_len=%d key_mgmt=0x%x", 59 MAC2STR(dest), ver, (int) mic_len, sm->key_mgmt); 60 if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) { 61 /* 62 * Association event was not yet received; try to fetch 63 * BSSID from the driver. 64 */ 65 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) { 66 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 67 "WPA: Failed to read BSSID for " 68 "EAPOL-Key destination address"); 69 } else { 70 dest = sm->bssid; 71 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 72 "WPA: Use BSSID (" MACSTR 73 ") as the destination for EAPOL-Key", 74 MAC2STR(dest)); 75 } 76 } 77 78 if (mic_len) { 79 if (key_mic && (!ptk || !ptk->kck_len)) 80 goto out; 81 82 if (key_mic && 83 wpa_eapol_key_mic(ptk->kck, ptk->kck_len, sm->key_mgmt, ver, 84 msg, msg_len, key_mic)) { 85 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 86 "WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC", 87 ver, sm->key_mgmt); 88 goto out; 89 } 90 if (ptk) 91 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", 92 ptk->kck, ptk->kck_len); 93 wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", 94 key_mic, mic_len); 95 } else { 96 #ifdef CONFIG_FILS 97 /* AEAD cipher - Key MIC field not used */ 98 struct ieee802_1x_hdr *s_hdr, *hdr; 99 struct wpa_eapol_key *s_key, *key; 100 u8 *buf, *s_key_data, *key_data; 101 size_t buf_len = msg_len + AES_BLOCK_SIZE; 102 size_t key_data_len; 103 u16 eapol_len; 104 const u8 *aad[1]; 105 size_t aad_len[1]; 106 107 if (!ptk || !ptk->kek_len) 108 goto out; 109 110 key_data_len = msg_len - sizeof(struct ieee802_1x_hdr) - 111 sizeof(struct wpa_eapol_key) - 2; 112 113 buf = os_malloc(buf_len); 114 if (!buf) 115 goto out; 116 117 os_memcpy(buf, msg, msg_len); 118 hdr = (struct ieee802_1x_hdr *) buf; 119 key = (struct wpa_eapol_key *) (hdr + 1); 120 key_data = ((u8 *) (key + 1)) + 2; 121 122 /* Update EAPOL header to include AES-SIV overhead */ 123 eapol_len = be_to_host16(hdr->length); 124 eapol_len += AES_BLOCK_SIZE; 125 hdr->length = host_to_be16(eapol_len); 126 127 /* Update Key Data Length field to include AES-SIV overhead */ 128 WPA_PUT_BE16((u8 *) (key + 1), AES_BLOCK_SIZE + key_data_len); 129 130 s_hdr = (struct ieee802_1x_hdr *) msg; 131 s_key = (struct wpa_eapol_key *) (s_hdr + 1); 132 s_key_data = ((u8 *) (s_key + 1)) + 2; 133 134 wpa_hexdump_key(MSG_DEBUG, "WPA: Plaintext Key Data", 135 s_key_data, key_data_len); 136 137 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len); 138 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to 139 * to Key Data (exclusive). */ 140 aad[0] = buf; 141 aad_len[0] = key_data - buf; 142 if (aes_siv_encrypt(ptk->kek, ptk->kek_len, 143 s_key_data, key_data_len, 144 1, aad, aad_len, key_data) < 0) { 145 os_free(buf); 146 goto out; 147 } 148 149 wpa_hexdump(MSG_DEBUG, "WPA: Encrypted Key Data from SIV", 150 key_data, AES_BLOCK_SIZE + key_data_len); 151 152 os_free(msg); 153 msg = buf; 154 msg_len = buf_len; 155 #else /* CONFIG_FILS */ 156 goto out; 157 #endif /* CONFIG_FILS */ 158 } 159 160 wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len); 161 ret = wpa_sm_ether_send(sm, dest, proto, msg, msg_len); 162 eapol_sm_notify_tx_eapol_key(sm->eapol); 163 out: 164 os_free(msg); 165 return ret; 166 } 167 168 169 /** 170 * wpa_sm_key_request - Send EAPOL-Key Request 171 * @sm: Pointer to WPA state machine data from wpa_sm_init() 172 * @error: Indicate whether this is an Michael MIC error report 173 * @pairwise: 1 = error report for pairwise packet, 0 = for group packet 174 * 175 * Send an EAPOL-Key Request to the current authenticator. This function is 176 * used to request rekeying and it is usually called when a local Michael MIC 177 * failure is detected. 178 */ 179 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise) 180 { 181 size_t mic_len, hdrlen, rlen; 182 struct wpa_eapol_key *reply; 183 int key_info, ver; 184 u8 bssid[ETH_ALEN], *rbuf, *key_mic, *mic; 185 186 if (wpa_use_akm_defined(sm->key_mgmt)) 187 ver = WPA_KEY_INFO_TYPE_AKM_DEFINED; 188 else if (wpa_key_mgmt_ft(sm->key_mgmt) || 189 wpa_key_mgmt_sha256(sm->key_mgmt)) 190 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC; 191 else if (sm->pairwise_cipher != WPA_CIPHER_TKIP) 192 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES; 193 else 194 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4; 195 196 if (wpa_sm_get_bssid(sm, bssid) < 0) { 197 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 198 "Failed to read BSSID for EAPOL-Key request"); 199 return; 200 } 201 202 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); 203 hdrlen = sizeof(*reply) + mic_len + 2; 204 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 205 hdrlen, &rlen, (void *) &reply); 206 if (rbuf == NULL) 207 return; 208 209 reply->type = (sm->proto == WPA_PROTO_RSN || 210 sm->proto == WPA_PROTO_OSEN) ? 211 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 212 key_info = WPA_KEY_INFO_REQUEST | ver; 213 if (sm->ptk_set) 214 key_info |= WPA_KEY_INFO_SECURE; 215 if (sm->ptk_set && mic_len) 216 key_info |= WPA_KEY_INFO_MIC; 217 if (error) 218 key_info |= WPA_KEY_INFO_ERROR; 219 if (pairwise) 220 key_info |= WPA_KEY_INFO_KEY_TYPE; 221 WPA_PUT_BE16(reply->key_info, key_info); 222 WPA_PUT_BE16(reply->key_length, 0); 223 os_memcpy(reply->replay_counter, sm->request_counter, 224 WPA_REPLAY_COUNTER_LEN); 225 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN); 226 227 mic = (u8 *) (reply + 1); 228 WPA_PUT_BE16(mic + mic_len, 0); 229 if (!(key_info & WPA_KEY_INFO_MIC)) 230 key_mic = NULL; 231 else 232 key_mic = mic; 233 234 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 235 "WPA: Sending EAPOL-Key Request (error=%d " 236 "pairwise=%d ptk_set=%d len=%lu)", 237 error, pairwise, sm->ptk_set, (unsigned long) rlen); 238 wpa_eapol_key_send(sm, &sm->ptk, ver, bssid, ETH_P_EAPOL, rbuf, rlen, 239 key_mic); 240 } 241 242 243 static void wpa_supplicant_key_mgmt_set_pmk(struct wpa_sm *sm) 244 { 245 #ifdef CONFIG_IEEE80211R 246 if (sm->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { 247 if (wpa_sm_key_mgmt_set_pmk(sm, sm->xxkey, sm->xxkey_len)) 248 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 249 "RSN: Cannot set low order 256 bits of MSK for key management offload"); 250 } else { 251 #endif /* CONFIG_IEEE80211R */ 252 if (wpa_sm_key_mgmt_set_pmk(sm, sm->pmk, sm->pmk_len)) 253 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 254 "RSN: Cannot set PMK for key management offload"); 255 #ifdef CONFIG_IEEE80211R 256 } 257 #endif /* CONFIG_IEEE80211R */ 258 } 259 260 261 static int wpa_supplicant_get_pmk(struct wpa_sm *sm, 262 const unsigned char *src_addr, 263 const u8 *pmkid) 264 { 265 int abort_cached = 0; 266 267 if (pmkid && !sm->cur_pmksa) { 268 /* When using drivers that generate RSN IE, wpa_supplicant may 269 * not have enough time to get the association information 270 * event before receiving this 1/4 message, so try to find a 271 * matching PMKSA cache entry here. */ 272 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid, 273 NULL, 0); 274 if (sm->cur_pmksa) { 275 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 276 "RSN: found matching PMKID from PMKSA cache"); 277 } else { 278 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 279 "RSN: no matching PMKID found"); 280 abort_cached = 1; 281 } 282 } 283 284 if (pmkid && sm->cur_pmksa && 285 os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) { 286 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN); 287 wpa_sm_set_pmk_from_pmksa(sm); 288 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache", 289 sm->pmk, sm->pmk_len); 290 eapol_sm_notify_cached(sm->eapol); 291 #ifdef CONFIG_IEEE80211R 292 sm->xxkey_len = 0; 293 #ifdef CONFIG_SAE 294 if (sm->key_mgmt == WPA_KEY_MGMT_FT_SAE && 295 sm->pmk_len == PMK_LEN) { 296 /* Need to allow FT key derivation to proceed with 297 * PMK from SAE being used as the XXKey in cases where 298 * the PMKID in msg 1/4 matches the PMKSA entry that was 299 * just added based on SAE authentication for the 300 * initial mobility domain association. */ 301 os_memcpy(sm->xxkey, sm->pmk, sm->pmk_len); 302 sm->xxkey_len = sm->pmk_len; 303 } 304 #endif /* CONFIG_SAE */ 305 #endif /* CONFIG_IEEE80211R */ 306 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) { 307 int res, pmk_len; 308 309 if (wpa_key_mgmt_sha384(sm->key_mgmt)) 310 pmk_len = PMK_LEN_SUITE_B_192; 311 else 312 pmk_len = PMK_LEN; 313 res = eapol_sm_get_key(sm->eapol, sm->pmk, pmk_len); 314 if (res) { 315 if (pmk_len == PMK_LEN) { 316 /* 317 * EAP-LEAP is an exception from other EAP 318 * methods: it uses only 16-byte PMK. 319 */ 320 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16); 321 pmk_len = 16; 322 } 323 } else { 324 #ifdef CONFIG_IEEE80211R 325 u8 buf[2 * PMK_LEN]; 326 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0) 327 { 328 if (wpa_key_mgmt_sha384(sm->key_mgmt)) { 329 os_memcpy(sm->xxkey, buf, 330 SHA384_MAC_LEN); 331 sm->xxkey_len = SHA384_MAC_LEN; 332 } else { 333 os_memcpy(sm->xxkey, buf + PMK_LEN, 334 PMK_LEN); 335 sm->xxkey_len = PMK_LEN; 336 } 337 os_memset(buf, 0, sizeof(buf)); 338 } 339 #endif /* CONFIG_IEEE80211R */ 340 } 341 if (res == 0) { 342 struct rsn_pmksa_cache_entry *sa = NULL; 343 const u8 *fils_cache_id = NULL; 344 345 #ifdef CONFIG_FILS 346 if (sm->fils_cache_id_set) 347 fils_cache_id = sm->fils_cache_id; 348 #endif /* CONFIG_FILS */ 349 350 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state " 351 "machines", sm->pmk, pmk_len); 352 sm->pmk_len = pmk_len; 353 wpa_supplicant_key_mgmt_set_pmk(sm); 354 if (sm->proto == WPA_PROTO_RSN && 355 !wpa_key_mgmt_suite_b(sm->key_mgmt) && 356 !wpa_key_mgmt_ft(sm->key_mgmt)) { 357 sa = pmksa_cache_add(sm->pmksa, 358 sm->pmk, pmk_len, NULL, 359 NULL, 0, 360 src_addr, sm->own_addr, 361 sm->network_ctx, 362 sm->key_mgmt, 363 fils_cache_id); 364 } 365 if (!sm->cur_pmksa && pmkid && 366 pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL, 367 0)) { 368 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 369 "RSN: the new PMK matches with the " 370 "PMKID"); 371 abort_cached = 0; 372 } else if (sa && !sm->cur_pmksa && pmkid) { 373 /* 374 * It looks like the authentication server 375 * derived mismatching MSK. This should not 376 * really happen, but bugs happen.. There is not 377 * much we can do here without knowing what 378 * exactly caused the server to misbehave. 379 */ 380 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 381 "RSN: PMKID mismatch - authentication server may have derived different MSK?!"); 382 return -1; 383 } 384 385 if (!sm->cur_pmksa) 386 sm->cur_pmksa = sa; 387 #ifdef CONFIG_IEEE80211R 388 } else if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->ft_protocol) { 389 wpa_printf(MSG_DEBUG, 390 "FT: Continue 4-way handshake without PMK/PMKID for association using FT protocol"); 391 #endif /* CONFIG_IEEE80211R */ 392 } else { 393 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 394 "WPA: Failed to get master session key from " 395 "EAPOL state machines - key handshake " 396 "aborted"); 397 if (sm->cur_pmksa) { 398 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 399 "RSN: Cancelled PMKSA caching " 400 "attempt"); 401 sm->cur_pmksa = NULL; 402 abort_cached = 1; 403 } else if (!abort_cached) { 404 return -1; 405 } 406 } 407 } 408 409 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && 410 !wpa_key_mgmt_suite_b(sm->key_mgmt) && 411 !wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN) 412 { 413 /* Send EAPOL-Start to trigger full EAP authentication. */ 414 u8 *buf; 415 size_t buflen; 416 417 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 418 "RSN: no PMKSA entry found - trigger " 419 "full EAP authentication"); 420 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START, 421 NULL, 0, &buflen, NULL); 422 if (buf) { 423 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL, 424 buf, buflen); 425 os_free(buf); 426 return -2; 427 } 428 429 return -1; 430 } 431 432 return 0; 433 } 434 435 436 /** 437 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake 438 * @sm: Pointer to WPA state machine data from wpa_sm_init() 439 * @dst: Destination address for the frame 440 * @key: Pointer to the EAPOL-Key frame header 441 * @ver: Version bits from EAPOL-Key Key Info 442 * @nonce: Nonce value for the EAPOL-Key frame 443 * @wpa_ie: WPA/RSN IE 444 * @wpa_ie_len: Length of the WPA/RSN IE 445 * @ptk: PTK to use for keyed hash and encryption 446 * Returns: >= 0 on success, < 0 on failure 447 */ 448 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst, 449 const struct wpa_eapol_key *key, 450 int ver, const u8 *nonce, 451 const u8 *wpa_ie, size_t wpa_ie_len, 452 struct wpa_ptk *ptk) 453 { 454 size_t mic_len, hdrlen, rlen; 455 struct wpa_eapol_key *reply; 456 u8 *rbuf, *key_mic; 457 u8 *rsn_ie_buf = NULL; 458 u16 key_info; 459 460 if (wpa_ie == NULL) { 461 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - " 462 "cannot generate msg 2/4"); 463 return -1; 464 } 465 466 #ifdef CONFIG_IEEE80211R 467 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 468 int res; 469 470 /* 471 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and 472 * FTIE from (Re)Association Response. 473 */ 474 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN + 475 sm->assoc_resp_ies_len); 476 if (rsn_ie_buf == NULL) 477 return -1; 478 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len); 479 res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len, 480 sm->pmk_r1_name); 481 if (res < 0) { 482 os_free(rsn_ie_buf); 483 return -1; 484 } 485 486 if (sm->assoc_resp_ies) { 487 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies, 488 sm->assoc_resp_ies_len); 489 wpa_ie_len += sm->assoc_resp_ies_len; 490 } 491 492 wpa_ie = rsn_ie_buf; 493 } 494 #endif /* CONFIG_IEEE80211R */ 495 496 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len); 497 498 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); 499 hdrlen = sizeof(*reply) + mic_len + 2; 500 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, 501 NULL, hdrlen + wpa_ie_len, 502 &rlen, (void *) &reply); 503 if (rbuf == NULL) { 504 os_free(rsn_ie_buf); 505 return -1; 506 } 507 508 reply->type = (sm->proto == WPA_PROTO_RSN || 509 sm->proto == WPA_PROTO_OSEN) ? 510 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 511 key_info = ver | WPA_KEY_INFO_KEY_TYPE; 512 if (mic_len) 513 key_info |= WPA_KEY_INFO_MIC; 514 else 515 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; 516 WPA_PUT_BE16(reply->key_info, key_info); 517 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 518 WPA_PUT_BE16(reply->key_length, 0); 519 else 520 os_memcpy(reply->key_length, key->key_length, 2); 521 os_memcpy(reply->replay_counter, key->replay_counter, 522 WPA_REPLAY_COUNTER_LEN); 523 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter, 524 WPA_REPLAY_COUNTER_LEN); 525 526 key_mic = (u8 *) (reply + 1); 527 WPA_PUT_BE16(key_mic + mic_len, wpa_ie_len); /* Key Data Length */ 528 os_memcpy(key_mic + mic_len + 2, wpa_ie, wpa_ie_len); /* Key Data */ 529 os_free(rsn_ie_buf); 530 531 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN); 532 533 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4"); 534 return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, 535 key_mic); 536 } 537 538 539 static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr, 540 const struct wpa_eapol_key *key, struct wpa_ptk *ptk) 541 { 542 const u8 *z = NULL; 543 size_t z_len = 0; 544 545 #ifdef CONFIG_IEEE80211R 546 if (wpa_key_mgmt_ft(sm->key_mgmt)) 547 return wpa_derive_ptk_ft(sm, src_addr, key, ptk); 548 #endif /* CONFIG_IEEE80211R */ 549 550 #ifdef CONFIG_DPP2 551 if (sm->key_mgmt == WPA_KEY_MGMT_DPP && sm->dpp_z) { 552 z = wpabuf_head(sm->dpp_z); 553 z_len = wpabuf_len(sm->dpp_z); 554 } 555 #endif /* CONFIG_DPP2 */ 556 557 return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion", 558 sm->own_addr, sm->bssid, sm->snonce, 559 key->key_nonce, ptk, sm->key_mgmt, 560 sm->pairwise_cipher, z, z_len); 561 } 562 563 564 static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm, 565 const unsigned char *src_addr, 566 const struct wpa_eapol_key *key, 567 u16 ver, const u8 *key_data, 568 size_t key_data_len) 569 { 570 struct wpa_eapol_ie_parse ie; 571 struct wpa_ptk *ptk; 572 int res; 573 u8 *kde, *kde_buf = NULL; 574 size_t kde_len; 575 576 if (wpa_sm_get_network_ctx(sm) == NULL) { 577 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info " 578 "found (msg 1 of 4)"); 579 return; 580 } 581 582 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 583 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way " 584 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 585 586 os_memset(&ie, 0, sizeof(ie)); 587 588 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 589 /* RSN: msg 1/4 should contain PMKID for the selected PMK */ 590 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", 591 key_data, key_data_len); 592 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) 593 goto failed; 594 if (ie.pmkid) { 595 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from " 596 "Authenticator", ie.pmkid, PMKID_LEN); 597 } 598 } 599 600 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid); 601 if (res == -2) { 602 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to " 603 "msg 1/4 - requesting full EAP authentication"); 604 return; 605 } 606 if (res) 607 goto failed; 608 609 if (sm->renew_snonce) { 610 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) { 611 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 612 "WPA: Failed to get random data for SNonce"); 613 goto failed; 614 } 615 sm->renew_snonce = 0; 616 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce", 617 sm->snonce, WPA_NONCE_LEN); 618 } 619 620 /* Calculate PTK which will be stored as a temporary PTK until it has 621 * been verified when processing message 3/4. */ 622 ptk = &sm->tptk; 623 if (wpa_derive_ptk(sm, src_addr, key, ptk) < 0) 624 goto failed; 625 if (sm->pairwise_cipher == WPA_CIPHER_TKIP) { 626 u8 buf[8]; 627 /* Supplicant: swap tx/rx Mic keys */ 628 os_memcpy(buf, &ptk->tk[16], 8); 629 os_memcpy(&ptk->tk[16], &ptk->tk[24], 8); 630 os_memcpy(&ptk->tk[24], buf, 8); 631 os_memset(buf, 0, sizeof(buf)); 632 } 633 sm->tptk_set = 1; 634 635 kde = sm->assoc_wpa_ie; 636 kde_len = sm->assoc_wpa_ie_len; 637 638 #ifdef CONFIG_OCV 639 if (wpa_sm_ocv_enabled(sm)) { 640 struct wpa_channel_info ci; 641 u8 *pos; 642 643 if (wpa_sm_channel_info(sm, &ci) != 0) { 644 wpa_printf(MSG_WARNING, 645 "Failed to get channel info for OCI element in EAPOL-Key 2/4"); 646 goto failed; 647 } 648 649 kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 3); 650 if (!kde_buf) { 651 wpa_printf(MSG_WARNING, 652 "Failed to allocate memory for KDE with OCI in EAPOL-Key 2/4"); 653 goto failed; 654 } 655 656 os_memcpy(kde_buf, kde, kde_len); 657 kde = kde_buf; 658 pos = kde + kde_len; 659 if (ocv_insert_oci_kde(&ci, &pos) < 0) 660 goto failed; 661 kde_len = pos - kde; 662 } 663 #endif /* CONFIG_OCV */ 664 665 #ifdef CONFIG_P2P 666 if (sm->p2p) { 667 kde_buf = os_malloc(kde_len + 2 + RSN_SELECTOR_LEN + 1); 668 if (kde_buf) { 669 u8 *pos; 670 wpa_printf(MSG_DEBUG, "P2P: Add IP Address Request KDE " 671 "into EAPOL-Key 2/4"); 672 os_memcpy(kde_buf, kde, kde_len); 673 kde = kde_buf; 674 pos = kde + kde_len; 675 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 676 *pos++ = RSN_SELECTOR_LEN + 1; 677 RSN_SELECTOR_PUT(pos, WFA_KEY_DATA_IP_ADDR_REQ); 678 pos += RSN_SELECTOR_LEN; 679 *pos++ = 0x01; 680 kde_len = pos - kde; 681 } 682 } 683 #endif /* CONFIG_P2P */ 684 685 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce, 686 kde, kde_len, ptk) < 0) 687 goto failed; 688 689 os_free(kde_buf); 690 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN); 691 return; 692 693 failed: 694 os_free(kde_buf); 695 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 696 } 697 698 699 static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx) 700 { 701 struct wpa_sm *sm = eloop_ctx; 702 rsn_preauth_candidate_process(sm); 703 } 704 705 706 static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm, 707 const u8 *addr, int secure) 708 { 709 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 710 "WPA: Key negotiation completed with " 711 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr), 712 wpa_cipher_txt(sm->pairwise_cipher), 713 wpa_cipher_txt(sm->group_cipher)); 714 wpa_sm_cancel_auth_timeout(sm); 715 wpa_sm_set_state(sm, WPA_COMPLETED); 716 717 if (secure) { 718 wpa_sm_mlme_setprotection( 719 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX, 720 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 721 eapol_sm_notify_portValid(sm->eapol, TRUE); 722 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 723 sm->key_mgmt == WPA_KEY_MGMT_DPP || 724 sm->key_mgmt == WPA_KEY_MGMT_OWE) 725 eapol_sm_notify_eap_success(sm->eapol, TRUE); 726 /* 727 * Start preauthentication after a short wait to avoid a 728 * possible race condition between the data receive and key 729 * configuration after the 4-Way Handshake. This increases the 730 * likelihood of the first preauth EAPOL-Start frame getting to 731 * the target AP. 732 */ 733 if (!dl_list_empty(&sm->pmksa_candidates)) 734 eloop_register_timeout(1, 0, wpa_sm_start_preauth, 735 sm, NULL); 736 } 737 738 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) { 739 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 740 "RSN: Authenticator accepted " 741 "opportunistic PMKSA entry - marking it valid"); 742 sm->cur_pmksa->opportunistic = 0; 743 } 744 745 #ifdef CONFIG_IEEE80211R 746 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 747 /* Prepare for the next transition */ 748 wpa_ft_prepare_auth_request(sm, NULL); 749 } 750 #endif /* CONFIG_IEEE80211R */ 751 } 752 753 754 static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx) 755 { 756 struct wpa_sm *sm = eloop_ctx; 757 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying"); 758 wpa_sm_key_request(sm, 0, 1); 759 } 760 761 762 static int wpa_supplicant_install_ptk(struct wpa_sm *sm, 763 const struct wpa_eapol_key *key) 764 { 765 int keylen, rsclen; 766 enum wpa_alg alg; 767 const u8 *key_rsc; 768 769 if (sm->ptk.installed) { 770 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 771 "WPA: Do not re-install same PTK to the driver"); 772 return 0; 773 } 774 775 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 776 "WPA: Installing PTK to the driver"); 777 778 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 779 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher " 780 "Suite: NONE - do not use pairwise keys"); 781 return 0; 782 } 783 784 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { 785 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 786 "WPA: Unsupported pairwise cipher %d", 787 sm->pairwise_cipher); 788 return -1; 789 } 790 791 alg = wpa_cipher_to_alg(sm->pairwise_cipher); 792 keylen = wpa_cipher_key_len(sm->pairwise_cipher); 793 if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) { 794 wpa_printf(MSG_DEBUG, "WPA: TK length mismatch: %d != %lu", 795 keylen, (long unsigned int) sm->ptk.tk_len); 796 return -1; 797 } 798 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); 799 800 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 801 key_rsc = null_rsc; 802 } else { 803 key_rsc = key->key_rsc; 804 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen); 805 } 806 807 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen, 808 sm->ptk.tk, keylen) < 0) { 809 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 810 "WPA: Failed to set PTK to the " 811 "driver (alg=%d keylen=%d bssid=" MACSTR ")", 812 alg, keylen, MAC2STR(sm->bssid)); 813 return -1; 814 } 815 816 /* TK is not needed anymore in supplicant */ 817 os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); 818 sm->ptk.tk_len = 0; 819 sm->ptk.installed = 1; 820 821 if (sm->wpa_ptk_rekey) { 822 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 823 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk, 824 sm, NULL); 825 } 826 827 return 0; 828 } 829 830 831 static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm, 832 int group_cipher, 833 int keylen, int maxkeylen, 834 int *key_rsc_len, 835 enum wpa_alg *alg) 836 { 837 int klen; 838 839 *alg = wpa_cipher_to_alg(group_cipher); 840 if (*alg == WPA_ALG_NONE) { 841 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 842 "WPA: Unsupported Group Cipher %d", 843 group_cipher); 844 return -1; 845 } 846 *key_rsc_len = wpa_cipher_rsc_len(group_cipher); 847 848 klen = wpa_cipher_key_len(group_cipher); 849 if (keylen != klen || maxkeylen < klen) { 850 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 851 "WPA: Unsupported %s Group Cipher key length %d (%d)", 852 wpa_cipher_txt(group_cipher), keylen, maxkeylen); 853 return -1; 854 } 855 return 0; 856 } 857 858 859 struct wpa_gtk_data { 860 enum wpa_alg alg; 861 int tx, key_rsc_len, keyidx; 862 u8 gtk[32]; 863 int gtk_len; 864 }; 865 866 867 static int wpa_supplicant_install_gtk(struct wpa_sm *sm, 868 const struct wpa_gtk_data *gd, 869 const u8 *key_rsc, int wnm_sleep) 870 { 871 const u8 *_gtk = gd->gtk; 872 u8 gtk_buf[32]; 873 874 /* Detect possible key reinstallation */ 875 if ((sm->gtk.gtk_len == (size_t) gd->gtk_len && 876 os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) || 877 (sm->gtk_wnm_sleep.gtk_len == (size_t) gd->gtk_len && 878 os_memcmp(sm->gtk_wnm_sleep.gtk, gd->gtk, 879 sm->gtk_wnm_sleep.gtk_len) == 0)) { 880 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 881 "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)", 882 gd->keyidx, gd->tx, gd->gtk_len); 883 return 0; 884 } 885 886 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); 887 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 888 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", 889 gd->keyidx, gd->tx, gd->gtk_len); 890 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len); 891 if (sm->group_cipher == WPA_CIPHER_TKIP) { 892 /* Swap Tx/Rx keys for Michael MIC */ 893 os_memcpy(gtk_buf, gd->gtk, 16); 894 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8); 895 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8); 896 _gtk = gtk_buf; 897 } 898 if (sm->pairwise_cipher == WPA_CIPHER_NONE) { 899 if (wpa_sm_set_key(sm, gd->alg, NULL, 900 gd->keyidx, 1, key_rsc, gd->key_rsc_len, 901 _gtk, gd->gtk_len) < 0) { 902 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 903 "WPA: Failed to set GTK to the driver " 904 "(Group only)"); 905 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 906 return -1; 907 } 908 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr, 909 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len, 910 _gtk, gd->gtk_len) < 0) { 911 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 912 "WPA: Failed to set GTK to " 913 "the driver (alg=%d keylen=%d keyidx=%d)", 914 gd->alg, gd->gtk_len, gd->keyidx); 915 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 916 return -1; 917 } 918 os_memset(gtk_buf, 0, sizeof(gtk_buf)); 919 920 if (wnm_sleep) { 921 sm->gtk_wnm_sleep.gtk_len = gd->gtk_len; 922 os_memcpy(sm->gtk_wnm_sleep.gtk, gd->gtk, 923 sm->gtk_wnm_sleep.gtk_len); 924 } else { 925 sm->gtk.gtk_len = gd->gtk_len; 926 os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len); 927 } 928 929 return 0; 930 } 931 932 933 static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm, 934 int tx) 935 { 936 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) { 937 /* Ignore Tx bit for GTK if a pairwise key is used. One AP 938 * seemed to set this bit (incorrectly, since Tx is only when 939 * doing Group Key only APs) and without this workaround, the 940 * data connection does not work because wpa_supplicant 941 * configured non-zero keyidx to be used for unicast. */ 942 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 943 "WPA: Tx bit set for GTK, but pairwise " 944 "keys are used - ignore Tx bit"); 945 return 0; 946 } 947 return tx; 948 } 949 950 951 static int wpa_supplicant_rsc_relaxation(const struct wpa_sm *sm, 952 const u8 *rsc) 953 { 954 int rsclen; 955 956 if (!sm->wpa_rsc_relaxation) 957 return 0; 958 959 rsclen = wpa_cipher_rsc_len(sm->group_cipher); 960 961 /* 962 * Try to detect RSC (endian) corruption issue where the AP sends 963 * the RSC bytes in EAPOL-Key message in the wrong order, both if 964 * it's actually a 6-byte field (as it should be) and if it treats 965 * it as an 8-byte field. 966 * An AP model known to have this bug is the Sapido RB-1632. 967 */ 968 if (rsclen == 6 && ((rsc[5] && !rsc[0]) || rsc[6] || rsc[7])) { 969 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 970 "RSC %02x%02x%02x%02x%02x%02x%02x%02x is likely bogus, using 0", 971 rsc[0], rsc[1], rsc[2], rsc[3], 972 rsc[4], rsc[5], rsc[6], rsc[7]); 973 974 return 1; 975 } 976 977 return 0; 978 } 979 980 981 static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm, 982 const struct wpa_eapol_key *key, 983 const u8 *gtk, size_t gtk_len, 984 int key_info) 985 { 986 struct wpa_gtk_data gd; 987 const u8 *key_rsc; 988 989 /* 990 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x 991 * GTK KDE format: 992 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7] 993 * Reserved [bits 0-7] 994 * GTK 995 */ 996 997 os_memset(&gd, 0, sizeof(gd)); 998 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", 999 gtk, gtk_len); 1000 1001 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk)) 1002 return -1; 1003 1004 gd.keyidx = gtk[0] & 0x3; 1005 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1006 !!(gtk[0] & BIT(2))); 1007 gtk += 2; 1008 gtk_len -= 2; 1009 1010 os_memcpy(gd.gtk, gtk, gtk_len); 1011 gd.gtk_len = gtk_len; 1012 1013 key_rsc = key->key_rsc; 1014 if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) 1015 key_rsc = null_rsc; 1016 1017 if (sm->group_cipher != WPA_CIPHER_GTK_NOT_USED && 1018 (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1019 gtk_len, gtk_len, 1020 &gd.key_rsc_len, &gd.alg) || 1021 wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0))) { 1022 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1023 "RSN: Failed to install GTK"); 1024 os_memset(&gd, 0, sizeof(gd)); 1025 return -1; 1026 } 1027 os_memset(&gd, 0, sizeof(gd)); 1028 1029 return 0; 1030 } 1031 1032 1033 #ifdef CONFIG_IEEE80211W 1034 static int wpa_supplicant_install_igtk(struct wpa_sm *sm, 1035 const struct wpa_igtk_kde *igtk, 1036 int wnm_sleep) 1037 { 1038 size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher); 1039 u16 keyidx = WPA_GET_LE16(igtk->keyid); 1040 1041 /* Detect possible key reinstallation */ 1042 if ((sm->igtk.igtk_len == len && 1043 os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) || 1044 (sm->igtk_wnm_sleep.igtk_len == len && 1045 os_memcmp(sm->igtk_wnm_sleep.igtk, igtk->igtk, 1046 sm->igtk_wnm_sleep.igtk_len) == 0)) { 1047 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1048 "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)", 1049 keyidx); 1050 return 0; 1051 } 1052 1053 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1054 "WPA: IGTK keyid %d pn " COMPACT_MACSTR, 1055 keyidx, MAC2STR(igtk->pn)); 1056 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len); 1057 if (keyidx > 4095) { 1058 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1059 "WPA: Invalid IGTK KeyID %d", keyidx); 1060 return -1; 1061 } 1062 if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), 1063 broadcast_ether_addr, 1064 keyidx, 0, igtk->pn, sizeof(igtk->pn), 1065 igtk->igtk, len) < 0) { 1066 if (keyidx == 0x0400 || keyidx == 0x0500) { 1067 /* Assume the AP has broken PMF implementation since it 1068 * seems to have swapped the KeyID bytes. The AP cannot 1069 * be trusted to implement BIP correctly or provide a 1070 * valid IGTK, so do not try to configure this key with 1071 * swapped KeyID bytes. Instead, continue without 1072 * configuring the IGTK so that the driver can drop any 1073 * received group-addressed robust management frames due 1074 * to missing keys. 1075 * 1076 * Normally, this error behavior would result in us 1077 * disconnecting, but there are number of deployed APs 1078 * with this broken behavior, so as an interoperability 1079 * workaround, allow the connection to proceed. */ 1080 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1081 "WPA: Ignore IGTK configuration error due to invalid IGTK KeyID byte order"); 1082 } else { 1083 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1084 "WPA: Failed to configure IGTK to the driver"); 1085 return -1; 1086 } 1087 } 1088 1089 if (wnm_sleep) { 1090 sm->igtk_wnm_sleep.igtk_len = len; 1091 os_memcpy(sm->igtk_wnm_sleep.igtk, igtk->igtk, 1092 sm->igtk_wnm_sleep.igtk_len); 1093 } else { 1094 sm->igtk.igtk_len = len; 1095 os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len); 1096 } 1097 1098 return 0; 1099 } 1100 #endif /* CONFIG_IEEE80211W */ 1101 1102 1103 static int ieee80211w_set_keys(struct wpa_sm *sm, 1104 struct wpa_eapol_ie_parse *ie) 1105 { 1106 #ifdef CONFIG_IEEE80211W 1107 if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher)) 1108 return 0; 1109 1110 if (ie->igtk) { 1111 size_t len; 1112 const struct wpa_igtk_kde *igtk; 1113 1114 len = wpa_cipher_key_len(sm->mgmt_group_cipher); 1115 if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) 1116 return -1; 1117 1118 igtk = (const struct wpa_igtk_kde *) ie->igtk; 1119 if (wpa_supplicant_install_igtk(sm, igtk, 0) < 0) 1120 return -1; 1121 } 1122 1123 return 0; 1124 #else /* CONFIG_IEEE80211W */ 1125 return 0; 1126 #endif /* CONFIG_IEEE80211W */ 1127 } 1128 1129 1130 static void wpa_report_ie_mismatch(struct wpa_sm *sm, 1131 const char *reason, const u8 *src_addr, 1132 const u8 *wpa_ie, size_t wpa_ie_len, 1133 const u8 *rsn_ie, size_t rsn_ie_len) 1134 { 1135 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")", 1136 reason, MAC2STR(src_addr)); 1137 1138 if (sm->ap_wpa_ie) { 1139 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp", 1140 sm->ap_wpa_ie, sm->ap_wpa_ie_len); 1141 } 1142 if (wpa_ie) { 1143 if (!sm->ap_wpa_ie) { 1144 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1145 "WPA: No WPA IE in Beacon/ProbeResp"); 1146 } 1147 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg", 1148 wpa_ie, wpa_ie_len); 1149 } 1150 1151 if (sm->ap_rsn_ie) { 1152 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp", 1153 sm->ap_rsn_ie, sm->ap_rsn_ie_len); 1154 } 1155 if (rsn_ie) { 1156 if (!sm->ap_rsn_ie) { 1157 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1158 "WPA: No RSN IE in Beacon/ProbeResp"); 1159 } 1160 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg", 1161 rsn_ie, rsn_ie_len); 1162 } 1163 1164 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS); 1165 } 1166 1167 1168 #ifdef CONFIG_IEEE80211R 1169 1170 static int ft_validate_mdie(struct wpa_sm *sm, 1171 const unsigned char *src_addr, 1172 struct wpa_eapol_ie_parse *ie, 1173 const u8 *assoc_resp_mdie) 1174 { 1175 struct rsn_mdie *mdie; 1176 1177 mdie = (struct rsn_mdie *) (ie->mdie + 2); 1178 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) || 1179 os_memcmp(mdie->mobility_domain, sm->mobility_domain, 1180 MOBILITY_DOMAIN_ID_LEN) != 0) { 1181 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did " 1182 "not match with the current mobility domain"); 1183 return -1; 1184 } 1185 1186 if (assoc_resp_mdie && 1187 (assoc_resp_mdie[1] != ie->mdie[1] || 1188 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) { 1189 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch"); 1190 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4", 1191 ie->mdie, 2 + ie->mdie[1]); 1192 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response", 1193 assoc_resp_mdie, 2 + assoc_resp_mdie[1]); 1194 return -1; 1195 } 1196 1197 return 0; 1198 } 1199 1200 1201 static int ft_validate_ftie(struct wpa_sm *sm, 1202 const unsigned char *src_addr, 1203 struct wpa_eapol_ie_parse *ie, 1204 const u8 *assoc_resp_ftie) 1205 { 1206 if (ie->ftie == NULL) { 1207 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1208 "FT: No FTIE in EAPOL-Key msg 3/4"); 1209 return -1; 1210 } 1211 1212 if (assoc_resp_ftie == NULL) 1213 return 0; 1214 1215 if (assoc_resp_ftie[1] != ie->ftie[1] || 1216 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) { 1217 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch"); 1218 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4", 1219 ie->ftie, 2 + ie->ftie[1]); 1220 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response", 1221 assoc_resp_ftie, 2 + assoc_resp_ftie[1]); 1222 return -1; 1223 } 1224 1225 return 0; 1226 } 1227 1228 1229 static int ft_validate_rsnie(struct wpa_sm *sm, 1230 const unsigned char *src_addr, 1231 struct wpa_eapol_ie_parse *ie) 1232 { 1233 struct wpa_ie_data rsn; 1234 1235 if (!ie->rsn_ie) 1236 return 0; 1237 1238 /* 1239 * Verify that PMKR1Name from EAPOL-Key message 3/4 1240 * matches with the value we derived. 1241 */ 1242 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 || 1243 rsn.num_pmkid != 1 || rsn.pmkid == NULL) { 1244 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in " 1245 "FT 4-way handshake message 3/4"); 1246 return -1; 1247 } 1248 1249 if (os_memcmp_const(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) 1250 { 1251 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1252 "FT: PMKR1Name mismatch in " 1253 "FT 4-way handshake message 3/4"); 1254 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator", 1255 rsn.pmkid, WPA_PMK_NAME_LEN); 1256 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name", 1257 sm->pmk_r1_name, WPA_PMK_NAME_LEN); 1258 return -1; 1259 } 1260 1261 return 0; 1262 } 1263 1264 1265 static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm, 1266 const unsigned char *src_addr, 1267 struct wpa_eapol_ie_parse *ie) 1268 { 1269 const u8 *pos, *end, *mdie = NULL, *ftie = NULL; 1270 1271 if (sm->assoc_resp_ies) { 1272 pos = sm->assoc_resp_ies; 1273 end = pos + sm->assoc_resp_ies_len; 1274 while (end - pos > 2) { 1275 if (2 + pos[1] > end - pos) 1276 break; 1277 switch (*pos) { 1278 case WLAN_EID_MOBILITY_DOMAIN: 1279 mdie = pos; 1280 break; 1281 case WLAN_EID_FAST_BSS_TRANSITION: 1282 ftie = pos; 1283 break; 1284 } 1285 pos += 2 + pos[1]; 1286 } 1287 } 1288 1289 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 || 1290 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 || 1291 ft_validate_rsnie(sm, src_addr, ie) < 0) 1292 return -1; 1293 1294 return 0; 1295 } 1296 1297 #endif /* CONFIG_IEEE80211R */ 1298 1299 1300 static int wpa_supplicant_validate_ie(struct wpa_sm *sm, 1301 const unsigned char *src_addr, 1302 struct wpa_eapol_ie_parse *ie) 1303 { 1304 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) { 1305 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 1306 "WPA: No WPA/RSN IE for this AP known. " 1307 "Trying to get from scan results"); 1308 if (wpa_sm_get_beacon_ie(sm) < 0) { 1309 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1310 "WPA: Could not find AP from " 1311 "the scan results"); 1312 } else { 1313 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG, 1314 "WPA: Found the current AP from " 1315 "updated scan results"); 1316 } 1317 } 1318 1319 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL && 1320 (sm->ap_wpa_ie || sm->ap_rsn_ie)) { 1321 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 1322 "with IE in Beacon/ProbeResp (no IE?)", 1323 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1324 ie->rsn_ie, ie->rsn_ie_len); 1325 return -1; 1326 } 1327 1328 if ((ie->wpa_ie && sm->ap_wpa_ie && 1329 (ie->wpa_ie_len != sm->ap_wpa_ie_len || 1330 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) || 1331 (ie->rsn_ie && sm->ap_rsn_ie && 1332 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt), 1333 sm->ap_rsn_ie, sm->ap_rsn_ie_len, 1334 ie->rsn_ie, ie->rsn_ie_len))) { 1335 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match " 1336 "with IE in Beacon/ProbeResp", 1337 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1338 ie->rsn_ie, ie->rsn_ie_len); 1339 return -1; 1340 } 1341 1342 if (sm->proto == WPA_PROTO_WPA && 1343 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) { 1344 wpa_report_ie_mismatch(sm, "Possible downgrade attack " 1345 "detected - RSN was enabled and RSN IE " 1346 "was in msg 3/4, but not in " 1347 "Beacon/ProbeResp", 1348 src_addr, ie->wpa_ie, ie->wpa_ie_len, 1349 ie->rsn_ie, ie->rsn_ie_len); 1350 return -1; 1351 } 1352 1353 #ifdef CONFIG_IEEE80211R 1354 if (wpa_key_mgmt_ft(sm->key_mgmt) && 1355 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0) 1356 return -1; 1357 #endif /* CONFIG_IEEE80211R */ 1358 1359 return 0; 1360 } 1361 1362 1363 /** 1364 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake 1365 * @sm: Pointer to WPA state machine data from wpa_sm_init() 1366 * @dst: Destination address for the frame 1367 * @key: Pointer to the EAPOL-Key frame header 1368 * @ver: Version bits from EAPOL-Key Key Info 1369 * @key_info: Key Info 1370 * @ptk: PTK to use for keyed hash and encryption 1371 * Returns: >= 0 on success, < 0 on failure 1372 */ 1373 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst, 1374 const struct wpa_eapol_key *key, 1375 u16 ver, u16 key_info, 1376 struct wpa_ptk *ptk) 1377 { 1378 size_t mic_len, hdrlen, rlen; 1379 struct wpa_eapol_key *reply; 1380 u8 *rbuf, *key_mic; 1381 1382 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); 1383 hdrlen = sizeof(*reply) + mic_len + 2; 1384 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1385 hdrlen, &rlen, (void *) &reply); 1386 if (rbuf == NULL) 1387 return -1; 1388 1389 reply->type = (sm->proto == WPA_PROTO_RSN || 1390 sm->proto == WPA_PROTO_OSEN) ? 1391 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1392 key_info &= WPA_KEY_INFO_SECURE; 1393 key_info |= ver | WPA_KEY_INFO_KEY_TYPE; 1394 if (mic_len) 1395 key_info |= WPA_KEY_INFO_MIC; 1396 else 1397 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; 1398 WPA_PUT_BE16(reply->key_info, key_info); 1399 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1400 WPA_PUT_BE16(reply->key_length, 0); 1401 else 1402 os_memcpy(reply->key_length, key->key_length, 2); 1403 os_memcpy(reply->replay_counter, key->replay_counter, 1404 WPA_REPLAY_COUNTER_LEN); 1405 1406 key_mic = (u8 *) (reply + 1); 1407 WPA_PUT_BE16(key_mic + mic_len, 0); 1408 1409 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4"); 1410 return wpa_eapol_key_send(sm, ptk, ver, dst, ETH_P_EAPOL, rbuf, rlen, 1411 key_mic); 1412 } 1413 1414 1415 static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm, 1416 const struct wpa_eapol_key *key, 1417 u16 ver, const u8 *key_data, 1418 size_t key_data_len) 1419 { 1420 u16 key_info, keylen; 1421 struct wpa_eapol_ie_parse ie; 1422 1423 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE); 1424 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way " 1425 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver); 1426 1427 key_info = WPA_GET_BE16(key->key_info); 1428 1429 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len); 1430 if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0) 1431 goto failed; 1432 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1433 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1434 "WPA: GTK IE in unencrypted key data"); 1435 goto failed; 1436 } 1437 #ifdef CONFIG_IEEE80211W 1438 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1439 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1440 "WPA: IGTK KDE in unencrypted key data"); 1441 goto failed; 1442 } 1443 1444 if (ie.igtk && 1445 wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher) && 1446 ie.igtk_len != WPA_IGTK_KDE_PREFIX_LEN + 1447 (unsigned int) wpa_cipher_key_len(sm->mgmt_group_cipher)) { 1448 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1449 "WPA: Invalid IGTK KDE length %lu", 1450 (unsigned long) ie.igtk_len); 1451 goto failed; 1452 } 1453 #endif /* CONFIG_IEEE80211W */ 1454 1455 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0) 1456 goto failed; 1457 1458 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) { 1459 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1460 "WPA: ANonce from message 1 of 4-Way Handshake " 1461 "differs from 3 of 4-Way Handshake - drop packet (src=" 1462 MACSTR ")", MAC2STR(sm->bssid)); 1463 goto failed; 1464 } 1465 1466 keylen = WPA_GET_BE16(key->key_length); 1467 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) { 1468 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1469 "WPA: Invalid %s key length %d (src=" MACSTR 1470 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen, 1471 MAC2STR(sm->bssid)); 1472 goto failed; 1473 } 1474 1475 #ifdef CONFIG_P2P 1476 if (ie.ip_addr_alloc) { 1477 os_memcpy(sm->p2p_ip_addr, ie.ip_addr_alloc, 3 * 4); 1478 wpa_hexdump(MSG_DEBUG, "P2P: IP address info", 1479 sm->p2p_ip_addr, sizeof(sm->p2p_ip_addr)); 1480 } 1481 #endif /* CONFIG_P2P */ 1482 1483 #ifdef CONFIG_OCV 1484 if (wpa_sm_ocv_enabled(sm)) { 1485 struct wpa_channel_info ci; 1486 1487 if (wpa_sm_channel_info(sm, &ci) != 0) { 1488 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1489 "Failed to get channel info to validate received OCI in EAPOL-Key 3/4"); 1490 return; 1491 } 1492 1493 if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci, 1494 channel_width_to_int(ci.chanwidth), 1495 ci.seg1_idx) != 0) { 1496 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s", 1497 ocv_errorstr); 1498 return; 1499 } 1500 } 1501 #endif /* CONFIG_OCV */ 1502 1503 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info, 1504 &sm->ptk) < 0) { 1505 goto failed; 1506 } 1507 1508 /* SNonce was successfully used in msg 3/4, so mark it to be renewed 1509 * for the next 4-Way Handshake. If msg 3 is received again, the old 1510 * SNonce will still be used to avoid changing PTK. */ 1511 sm->renew_snonce = 1; 1512 1513 if (key_info & WPA_KEY_INFO_INSTALL) { 1514 if (wpa_supplicant_install_ptk(sm, key)) 1515 goto failed; 1516 } 1517 1518 if (key_info & WPA_KEY_INFO_SECURE) { 1519 wpa_sm_mlme_setprotection( 1520 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX, 1521 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 1522 eapol_sm_notify_portValid(sm->eapol, TRUE); 1523 } 1524 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1525 1526 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED) { 1527 /* No GTK to be set to the driver */ 1528 } else if (!ie.gtk && sm->proto == WPA_PROTO_RSN) { 1529 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1530 "RSN: No GTK KDE included in EAPOL-Key msg 3/4"); 1531 goto failed; 1532 } else if (ie.gtk && 1533 wpa_supplicant_pairwise_gtk(sm, key, 1534 ie.gtk, ie.gtk_len, key_info) < 0) { 1535 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1536 "RSN: Failed to configure GTK"); 1537 goto failed; 1538 } 1539 1540 if (ieee80211w_set_keys(sm, &ie) < 0) { 1541 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1542 "RSN: Failed to configure IGTK"); 1543 goto failed; 1544 } 1545 1546 if (sm->group_cipher == WPA_CIPHER_GTK_NOT_USED || ie.gtk) 1547 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1548 key_info & WPA_KEY_INFO_SECURE); 1549 1550 if (ie.gtk) 1551 wpa_sm_set_rekey_offload(sm); 1552 1553 /* Add PMKSA cache entry for Suite B AKMs here since PMKID can be 1554 * calculated only after KCK has been derived. Though, do not replace an 1555 * existing PMKSA entry after each 4-way handshake (i.e., new KCK/PMKID) 1556 * to avoid unnecessary changes of PMKID while continuing to use the 1557 * same PMK. */ 1558 if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt) && 1559 !sm->cur_pmksa) { 1560 struct rsn_pmksa_cache_entry *sa; 1561 1562 sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL, 1563 sm->ptk.kck, sm->ptk.kck_len, 1564 sm->bssid, sm->own_addr, 1565 sm->network_ctx, sm->key_mgmt, NULL); 1566 if (!sm->cur_pmksa) 1567 sm->cur_pmksa = sa; 1568 } 1569 1570 sm->msg_3_of_4_ok = 1; 1571 return; 1572 1573 failed: 1574 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1575 } 1576 1577 1578 static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm, 1579 const u8 *keydata, 1580 size_t keydatalen, 1581 u16 key_info, 1582 struct wpa_gtk_data *gd) 1583 { 1584 int maxkeylen; 1585 struct wpa_eapol_ie_parse ie; 1586 1587 wpa_hexdump_key(MSG_DEBUG, "RSN: msg 1/2 key data", 1588 keydata, keydatalen); 1589 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0) 1590 return -1; 1591 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 1592 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1593 "WPA: GTK IE in unencrypted key data"); 1594 return -1; 1595 } 1596 if (ie.gtk == NULL) { 1597 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1598 "WPA: No GTK IE in Group Key msg 1/2"); 1599 return -1; 1600 } 1601 maxkeylen = gd->gtk_len = ie.gtk_len - 2; 1602 1603 #ifdef CONFIG_OCV 1604 if (wpa_sm_ocv_enabled(sm)) { 1605 struct wpa_channel_info ci; 1606 1607 if (wpa_sm_channel_info(sm, &ci) != 0) { 1608 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1609 "Failed to get channel info to validate received OCI in EAPOL-Key group msg 1/2"); 1610 return -1; 1611 } 1612 1613 if (ocv_verify_tx_params(ie.oci, ie.oci_len, &ci, 1614 channel_width_to_int(ci.chanwidth), 1615 ci.seg1_idx) != 0) { 1616 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "%s", 1617 ocv_errorstr); 1618 return -1; 1619 } 1620 } 1621 #endif /* CONFIG_OCV */ 1622 1623 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1624 gd->gtk_len, maxkeylen, 1625 &gd->key_rsc_len, &gd->alg)) 1626 return -1; 1627 1628 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in group key handshake", 1629 ie.gtk, ie.gtk_len); 1630 gd->keyidx = ie.gtk[0] & 0x3; 1631 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 1632 !!(ie.gtk[0] & BIT(2))); 1633 if (ie.gtk_len - 2 > sizeof(gd->gtk)) { 1634 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1635 "RSN: Too long GTK in GTK IE (len=%lu)", 1636 (unsigned long) ie.gtk_len - 2); 1637 return -1; 1638 } 1639 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2); 1640 1641 if (ieee80211w_set_keys(sm, &ie) < 0) 1642 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1643 "RSN: Failed to configure IGTK"); 1644 1645 return 0; 1646 } 1647 1648 1649 static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm, 1650 const struct wpa_eapol_key *key, 1651 const u8 *key_data, 1652 size_t key_data_len, u16 key_info, 1653 u16 ver, struct wpa_gtk_data *gd) 1654 { 1655 size_t maxkeylen; 1656 u16 gtk_len; 1657 1658 gtk_len = WPA_GET_BE16(key->key_length); 1659 maxkeylen = key_data_len; 1660 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1661 if (maxkeylen < 8) { 1662 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1663 "WPA: Too short maxkeylen (%lu)", 1664 (unsigned long) maxkeylen); 1665 return -1; 1666 } 1667 maxkeylen -= 8; 1668 } 1669 1670 if (gtk_len > maxkeylen || 1671 wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 1672 gtk_len, maxkeylen, 1673 &gd->key_rsc_len, &gd->alg)) 1674 return -1; 1675 1676 gd->gtk_len = gtk_len; 1677 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 1678 WPA_KEY_INFO_KEY_INDEX_SHIFT; 1679 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { 1680 #ifdef CONFIG_NO_RC4 1681 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1682 "WPA: RC4 not supported in the build"); 1683 return -1; 1684 #else /* CONFIG_NO_RC4 */ 1685 u8 ek[32]; 1686 if (key_data_len > sizeof(gd->gtk)) { 1687 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1688 "WPA: RC4 key data too long (%lu)", 1689 (unsigned long) key_data_len); 1690 return -1; 1691 } 1692 os_memcpy(ek, key->key_iv, 16); 1693 os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); 1694 os_memcpy(gd->gtk, key_data, key_data_len); 1695 if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) { 1696 os_memset(ek, 0, sizeof(ek)); 1697 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1698 "WPA: RC4 failed"); 1699 return -1; 1700 } 1701 os_memset(ek, 0, sizeof(ek)); 1702 #endif /* CONFIG_NO_RC4 */ 1703 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 1704 if (maxkeylen % 8) { 1705 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1706 "WPA: Unsupported AES-WRAP len %lu", 1707 (unsigned long) maxkeylen); 1708 return -1; 1709 } 1710 if (maxkeylen > sizeof(gd->gtk)) { 1711 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1712 "WPA: AES-WRAP key data " 1713 "too long (keydatalen=%lu maxkeylen=%lu)", 1714 (unsigned long) key_data_len, 1715 (unsigned long) maxkeylen); 1716 return -1; 1717 } 1718 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8, 1719 key_data, gd->gtk)) { 1720 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1721 "WPA: AES unwrap failed - could not decrypt " 1722 "GTK"); 1723 return -1; 1724 } 1725 } else { 1726 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1727 "WPA: Unsupported key_info type %d", ver); 1728 return -1; 1729 } 1730 gd->tx = wpa_supplicant_gtk_tx_bit_workaround( 1731 sm, !!(key_info & WPA_KEY_INFO_TXRX)); 1732 return 0; 1733 } 1734 1735 1736 static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm, 1737 const struct wpa_eapol_key *key, 1738 int ver, u16 key_info) 1739 { 1740 size_t mic_len, hdrlen, rlen; 1741 struct wpa_eapol_key *reply; 1742 u8 *rbuf, *key_mic; 1743 size_t kde_len = 0; 1744 1745 #ifdef CONFIG_OCV 1746 if (wpa_sm_ocv_enabled(sm)) 1747 kde_len = OCV_OCI_KDE_LEN; 1748 #endif /* CONFIG_OCV */ 1749 1750 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); 1751 hdrlen = sizeof(*reply) + mic_len + 2; 1752 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL, 1753 hdrlen + kde_len, &rlen, (void *) &reply); 1754 if (rbuf == NULL) 1755 return -1; 1756 1757 reply->type = (sm->proto == WPA_PROTO_RSN || 1758 sm->proto == WPA_PROTO_OSEN) ? 1759 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; 1760 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK; 1761 key_info |= ver | WPA_KEY_INFO_SECURE; 1762 if (mic_len) 1763 key_info |= WPA_KEY_INFO_MIC; 1764 else 1765 key_info |= WPA_KEY_INFO_ENCR_KEY_DATA; 1766 WPA_PUT_BE16(reply->key_info, key_info); 1767 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) 1768 WPA_PUT_BE16(reply->key_length, 0); 1769 else 1770 os_memcpy(reply->key_length, key->key_length, 2); 1771 os_memcpy(reply->replay_counter, key->replay_counter, 1772 WPA_REPLAY_COUNTER_LEN); 1773 1774 key_mic = (u8 *) (reply + 1); 1775 WPA_PUT_BE16(key_mic + mic_len, kde_len); /* Key Data Length */ 1776 1777 #ifdef CONFIG_OCV 1778 if (wpa_sm_ocv_enabled(sm)) { 1779 struct wpa_channel_info ci; 1780 u8 *pos; 1781 1782 if (wpa_sm_channel_info(sm, &ci) != 0) { 1783 wpa_printf(MSG_WARNING, 1784 "Failed to get channel info for OCI element in EAPOL-Key 2/2"); 1785 os_free(rbuf); 1786 return -1; 1787 } 1788 1789 pos = key_mic + mic_len + 2; /* Key Data */ 1790 if (ocv_insert_oci_kde(&ci, &pos) < 0) { 1791 os_free(rbuf); 1792 return -1; 1793 } 1794 } 1795 #endif /* CONFIG_OCV */ 1796 1797 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2"); 1798 return wpa_eapol_key_send(sm, &sm->ptk, ver, sm->bssid, ETH_P_EAPOL, 1799 rbuf, rlen, key_mic); 1800 } 1801 1802 1803 static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm, 1804 const unsigned char *src_addr, 1805 const struct wpa_eapol_key *key, 1806 const u8 *key_data, 1807 size_t key_data_len, u16 ver) 1808 { 1809 u16 key_info; 1810 int rekey, ret; 1811 struct wpa_gtk_data gd; 1812 const u8 *key_rsc; 1813 1814 if (!sm->msg_3_of_4_ok && !wpa_fils_is_completed(sm)) { 1815 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 1816 "WPA: Group Key Handshake started prior to completion of 4-way handshake"); 1817 goto failed; 1818 } 1819 1820 os_memset(&gd, 0, sizeof(gd)); 1821 1822 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED; 1823 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key " 1824 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver); 1825 1826 key_info = WPA_GET_BE16(key->key_info); 1827 1828 if (sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) { 1829 ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data, 1830 key_data_len, key_info, 1831 &gd); 1832 } else { 1833 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data, 1834 key_data_len, 1835 key_info, ver, &gd); 1836 } 1837 1838 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE); 1839 1840 if (ret) 1841 goto failed; 1842 1843 key_rsc = key->key_rsc; 1844 if (wpa_supplicant_rsc_relaxation(sm, key->key_rsc)) 1845 key_rsc = null_rsc; 1846 1847 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 0) || 1848 wpa_supplicant_send_2_of_2(sm, key, ver, key_info) < 0) 1849 goto failed; 1850 os_memset(&gd, 0, sizeof(gd)); 1851 1852 if (rekey) { 1853 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying " 1854 "completed with " MACSTR " [GTK=%s]", 1855 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher)); 1856 wpa_sm_cancel_auth_timeout(sm); 1857 wpa_sm_set_state(sm, WPA_COMPLETED); 1858 } else { 1859 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1860 key_info & 1861 WPA_KEY_INFO_SECURE); 1862 } 1863 1864 wpa_sm_set_rekey_offload(sm); 1865 1866 return; 1867 1868 failed: 1869 os_memset(&gd, 0, sizeof(gd)); 1870 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 1871 } 1872 1873 1874 static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm, 1875 struct wpa_eapol_key *key, 1876 u16 ver, 1877 const u8 *buf, size_t len) 1878 { 1879 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN]; 1880 int ok = 0; 1881 size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); 1882 1883 os_memcpy(mic, key + 1, mic_len); 1884 if (sm->tptk_set) { 1885 os_memset(key + 1, 0, mic_len); 1886 if (wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len, 1887 sm->key_mgmt, 1888 ver, buf, len, (u8 *) (key + 1)) < 0 || 1889 os_memcmp_const(mic, key + 1, mic_len) != 0) { 1890 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1891 "WPA: Invalid EAPOL-Key MIC " 1892 "when using TPTK - ignoring TPTK"); 1893 #ifdef TEST_FUZZ 1894 wpa_printf(MSG_INFO, 1895 "TEST: Ignore Key MIC failure for fuzz testing"); 1896 goto continue_fuzz; 1897 #endif /* TEST_FUZZ */ 1898 } else { 1899 #ifdef TEST_FUZZ 1900 continue_fuzz: 1901 #endif /* TEST_FUZZ */ 1902 ok = 1; 1903 sm->tptk_set = 0; 1904 sm->ptk_set = 1; 1905 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 1906 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 1907 /* 1908 * This assures the same TPTK in sm->tptk can never be 1909 * copied twice to sm->ptk as the new PTK. In 1910 * combination with the installed flag in the wpa_ptk 1911 * struct, this assures the same PTK is only installed 1912 * once. 1913 */ 1914 sm->renew_snonce = 1; 1915 } 1916 } 1917 1918 if (!ok && sm->ptk_set) { 1919 os_memset(key + 1, 0, mic_len); 1920 if (wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len, 1921 sm->key_mgmt, 1922 ver, buf, len, (u8 *) (key + 1)) < 0 || 1923 os_memcmp_const(mic, key + 1, mic_len) != 0) { 1924 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1925 "WPA: Invalid EAPOL-Key MIC - " 1926 "dropping packet"); 1927 #ifdef TEST_FUZZ 1928 wpa_printf(MSG_INFO, 1929 "TEST: Ignore Key MIC failure for fuzz testing"); 1930 goto continue_fuzz2; 1931 #endif /* TEST_FUZZ */ 1932 return -1; 1933 } 1934 #ifdef TEST_FUZZ 1935 continue_fuzz2: 1936 #endif /* TEST_FUZZ */ 1937 ok = 1; 1938 } 1939 1940 if (!ok) { 1941 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1942 "WPA: Could not verify EAPOL-Key MIC - " 1943 "dropping packet"); 1944 return -1; 1945 } 1946 1947 os_memcpy(sm->rx_replay_counter, key->replay_counter, 1948 WPA_REPLAY_COUNTER_LEN); 1949 sm->rx_replay_counter_set = 1; 1950 return 0; 1951 } 1952 1953 1954 /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */ 1955 static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm, 1956 struct wpa_eapol_key *key, 1957 size_t mic_len, u16 ver, 1958 u8 *key_data, size_t *key_data_len) 1959 { 1960 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data", 1961 key_data, *key_data_len); 1962 if (!sm->ptk_set) { 1963 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1964 "WPA: PTK not available, cannot decrypt EAPOL-Key Key " 1965 "Data"); 1966 return -1; 1967 } 1968 1969 /* Decrypt key data here so that this operation does not need 1970 * to be implemented separately for each message type. */ 1971 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) { 1972 #ifdef CONFIG_NO_RC4 1973 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 1974 "WPA: RC4 not supported in the build"); 1975 return -1; 1976 #else /* CONFIG_NO_RC4 */ 1977 u8 ek[32]; 1978 1979 wpa_printf(MSG_DEBUG, "WPA: Decrypt Key Data using RC4"); 1980 os_memcpy(ek, key->key_iv, 16); 1981 os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len); 1982 if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) { 1983 os_memset(ek, 0, sizeof(ek)); 1984 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 1985 "WPA: RC4 failed"); 1986 return -1; 1987 } 1988 os_memset(ek, 0, sizeof(ek)); 1989 #endif /* CONFIG_NO_RC4 */ 1990 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES || 1991 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC || 1992 wpa_use_aes_key_wrap(sm->key_mgmt)) { 1993 u8 *buf; 1994 1995 wpa_printf(MSG_DEBUG, 1996 "WPA: Decrypt Key Data using AES-UNWRAP (KEK length %u)", 1997 (unsigned int) sm->ptk.kek_len); 1998 if (*key_data_len < 8 || *key_data_len % 8) { 1999 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2000 "WPA: Unsupported AES-WRAP len %u", 2001 (unsigned int) *key_data_len); 2002 return -1; 2003 } 2004 *key_data_len -= 8; /* AES-WRAP adds 8 bytes */ 2005 buf = os_malloc(*key_data_len); 2006 if (buf == NULL) { 2007 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2008 "WPA: No memory for AES-UNWRAP buffer"); 2009 return -1; 2010 } 2011 #ifdef TEST_FUZZ 2012 os_memset(buf, 0x11, *key_data_len); 2013 #endif /* TEST_FUZZ */ 2014 if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8, 2015 key_data, buf)) { 2016 #ifdef TEST_FUZZ 2017 wpa_printf(MSG_INFO, 2018 "TEST: Ignore AES unwrap failure for fuzz testing"); 2019 goto continue_fuzz; 2020 #endif /* TEST_FUZZ */ 2021 bin_clear_free(buf, *key_data_len); 2022 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2023 "WPA: AES unwrap failed - " 2024 "could not decrypt EAPOL-Key key data"); 2025 return -1; 2026 } 2027 #ifdef TEST_FUZZ 2028 continue_fuzz: 2029 #endif /* TEST_FUZZ */ 2030 os_memcpy(key_data, buf, *key_data_len); 2031 bin_clear_free(buf, *key_data_len); 2032 WPA_PUT_BE16(((u8 *) (key + 1)) + mic_len, *key_data_len); 2033 } else { 2034 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2035 "WPA: Unsupported key_info type %d", ver); 2036 return -1; 2037 } 2038 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data", 2039 key_data, *key_data_len); 2040 return 0; 2041 } 2042 2043 2044 /** 2045 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted 2046 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2047 */ 2048 void wpa_sm_aborted_cached(struct wpa_sm *sm) 2049 { 2050 if (sm && sm->cur_pmksa) { 2051 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2052 "RSN: Cancelling PMKSA caching attempt"); 2053 sm->cur_pmksa = NULL; 2054 } 2055 } 2056 2057 2058 static void wpa_eapol_key_dump(struct wpa_sm *sm, 2059 const struct wpa_eapol_key *key, 2060 unsigned int key_data_len, 2061 const u8 *mic, unsigned int mic_len) 2062 { 2063 #ifndef CONFIG_NO_STDOUT_DEBUG 2064 u16 key_info = WPA_GET_BE16(key->key_info); 2065 2066 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type); 2067 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2068 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)", 2069 key_info, key_info & WPA_KEY_INFO_TYPE_MASK, 2070 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >> 2071 WPA_KEY_INFO_KEY_INDEX_SHIFT, 2072 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13, 2073 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group", 2074 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "", 2075 key_info & WPA_KEY_INFO_ACK ? " Ack" : "", 2076 key_info & WPA_KEY_INFO_MIC ? " MIC" : "", 2077 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "", 2078 key_info & WPA_KEY_INFO_ERROR ? " Error" : "", 2079 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "", 2080 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : ""); 2081 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2082 " key_length=%u key_data_length=%u", 2083 WPA_GET_BE16(key->key_length), key_data_len); 2084 wpa_hexdump(MSG_DEBUG, " replay_counter", 2085 key->replay_counter, WPA_REPLAY_COUNTER_LEN); 2086 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN); 2087 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16); 2088 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8); 2089 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8); 2090 wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len); 2091 #endif /* CONFIG_NO_STDOUT_DEBUG */ 2092 } 2093 2094 2095 #ifdef CONFIG_FILS 2096 static int wpa_supp_aead_decrypt(struct wpa_sm *sm, u8 *buf, size_t buf_len, 2097 size_t *key_data_len) 2098 { 2099 struct wpa_ptk *ptk; 2100 struct ieee802_1x_hdr *hdr; 2101 struct wpa_eapol_key *key; 2102 u8 *pos, *tmp; 2103 const u8 *aad[1]; 2104 size_t aad_len[1]; 2105 2106 if (*key_data_len < AES_BLOCK_SIZE) { 2107 wpa_printf(MSG_INFO, "No room for AES-SIV data in the frame"); 2108 return -1; 2109 } 2110 2111 if (sm->tptk_set) 2112 ptk = &sm->tptk; 2113 else if (sm->ptk_set) 2114 ptk = &sm->ptk; 2115 else 2116 return -1; 2117 2118 hdr = (struct ieee802_1x_hdr *) buf; 2119 key = (struct wpa_eapol_key *) (hdr + 1); 2120 pos = (u8 *) (key + 1); 2121 pos += 2; /* Pointing at the Encrypted Key Data field */ 2122 2123 tmp = os_malloc(*key_data_len); 2124 if (!tmp) 2125 return -1; 2126 2127 /* AES-SIV AAD from EAPOL protocol version field (inclusive) to 2128 * to Key Data (exclusive). */ 2129 aad[0] = buf; 2130 aad_len[0] = pos - buf; 2131 if (aes_siv_decrypt(ptk->kek, ptk->kek_len, pos, *key_data_len, 2132 1, aad, aad_len, tmp) < 0) { 2133 wpa_printf(MSG_INFO, "Invalid AES-SIV data in the frame"); 2134 bin_clear_free(tmp, *key_data_len); 2135 return -1; 2136 } 2137 2138 /* AEAD decryption and validation completed successfully */ 2139 (*key_data_len) -= AES_BLOCK_SIZE; 2140 wpa_hexdump_key(MSG_DEBUG, "WPA: Decrypted Key Data", 2141 tmp, *key_data_len); 2142 2143 /* Replace Key Data field with the decrypted version */ 2144 os_memcpy(pos, tmp, *key_data_len); 2145 pos -= 2; /* Key Data Length field */ 2146 WPA_PUT_BE16(pos, *key_data_len); 2147 bin_clear_free(tmp, *key_data_len); 2148 2149 if (sm->tptk_set) { 2150 sm->tptk_set = 0; 2151 sm->ptk_set = 1; 2152 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk)); 2153 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2154 } 2155 2156 os_memcpy(sm->rx_replay_counter, key->replay_counter, 2157 WPA_REPLAY_COUNTER_LEN); 2158 sm->rx_replay_counter_set = 1; 2159 2160 return 0; 2161 } 2162 #endif /* CONFIG_FILS */ 2163 2164 2165 /** 2166 * wpa_sm_rx_eapol - Process received WPA EAPOL frames 2167 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2168 * @src_addr: Source MAC address of the EAPOL packet 2169 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header) 2170 * @len: Length of the EAPOL frame 2171 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure 2172 * 2173 * This function is called for each received EAPOL frame. Other than EAPOL-Key 2174 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is 2175 * only processing WPA and WPA2 EAPOL-Key frames. 2176 * 2177 * The received EAPOL-Key packets are validated and valid packets are replied 2178 * to. In addition, key material (PTK, GTK) is configured at the end of a 2179 * successful key handshake. 2180 */ 2181 int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr, 2182 const u8 *buf, size_t len) 2183 { 2184 size_t plen, data_len, key_data_len; 2185 const struct ieee802_1x_hdr *hdr; 2186 struct wpa_eapol_key *key; 2187 u16 key_info, ver; 2188 u8 *tmp = NULL; 2189 int ret = -1; 2190 u8 *mic, *key_data; 2191 size_t mic_len, keyhdrlen; 2192 2193 #ifdef CONFIG_IEEE80211R 2194 sm->ft_completed = 0; 2195 #endif /* CONFIG_IEEE80211R */ 2196 2197 mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len); 2198 keyhdrlen = sizeof(*key) + mic_len + 2; 2199 2200 if (len < sizeof(*hdr) + keyhdrlen) { 2201 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2202 "WPA: EAPOL frame too short to be a WPA " 2203 "EAPOL-Key (len %lu, expecting at least %lu)", 2204 (unsigned long) len, 2205 (unsigned long) sizeof(*hdr) + keyhdrlen); 2206 return 0; 2207 } 2208 2209 hdr = (const struct ieee802_1x_hdr *) buf; 2210 plen = be_to_host16(hdr->length); 2211 data_len = plen + sizeof(*hdr); 2212 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2213 "IEEE 802.1X RX: version=%d type=%d length=%lu", 2214 hdr->version, hdr->type, (unsigned long) plen); 2215 2216 if (hdr->version < EAPOL_VERSION) { 2217 /* TODO: backwards compatibility */ 2218 } 2219 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) { 2220 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2221 "WPA: EAPOL frame (type %u) discarded, " 2222 "not a Key frame", hdr->type); 2223 ret = 0; 2224 goto out; 2225 } 2226 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", buf, len); 2227 if (plen > len - sizeof(*hdr) || plen < keyhdrlen) { 2228 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2229 "WPA: EAPOL frame payload size %lu " 2230 "invalid (frame size %lu)", 2231 (unsigned long) plen, (unsigned long) len); 2232 ret = 0; 2233 goto out; 2234 } 2235 if (data_len < len) { 2236 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2237 "WPA: ignoring %lu bytes after the IEEE 802.1X data", 2238 (unsigned long) len - data_len); 2239 } 2240 2241 /* 2242 * Make a copy of the frame since we need to modify the buffer during 2243 * MAC validation and Key Data decryption. 2244 */ 2245 tmp = os_memdup(buf, data_len); 2246 if (tmp == NULL) 2247 goto out; 2248 key = (struct wpa_eapol_key *) (tmp + sizeof(struct ieee802_1x_hdr)); 2249 mic = (u8 *) (key + 1); 2250 key_data = mic + mic_len + 2; 2251 2252 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) 2253 { 2254 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2255 "WPA: EAPOL-Key type (%d) unknown, discarded", 2256 key->type); 2257 ret = 0; 2258 goto out; 2259 } 2260 2261 key_data_len = WPA_GET_BE16(mic + mic_len); 2262 wpa_eapol_key_dump(sm, key, key_data_len, mic, mic_len); 2263 2264 if (key_data_len > plen - keyhdrlen) { 2265 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key " 2266 "frame - key_data overflow (%u > %u)", 2267 (unsigned int) key_data_len, 2268 (unsigned int) (plen - keyhdrlen)); 2269 goto out; 2270 } 2271 2272 eapol_sm_notify_lower_layer_success(sm->eapol, 0); 2273 key_info = WPA_GET_BE16(key->key_info); 2274 ver = key_info & WPA_KEY_INFO_TYPE_MASK; 2275 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && 2276 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 2277 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 2278 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 2279 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES && 2280 !wpa_use_akm_defined(sm->key_mgmt)) { 2281 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2282 "WPA: Unsupported EAPOL-Key descriptor version %d", 2283 ver); 2284 goto out; 2285 } 2286 2287 if (wpa_use_akm_defined(sm->key_mgmt) && 2288 ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) { 2289 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2290 "RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)", 2291 ver); 2292 goto out; 2293 } 2294 2295 #ifdef CONFIG_IEEE80211R 2296 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 2297 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */ 2298 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 2299 !wpa_use_akm_defined(sm->key_mgmt)) { 2300 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2301 "FT: AP did not use AES-128-CMAC"); 2302 goto out; 2303 } 2304 } else 2305 #endif /* CONFIG_IEEE80211R */ 2306 #ifdef CONFIG_IEEE80211W 2307 if (wpa_key_mgmt_sha256(sm->key_mgmt)) { 2308 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC && 2309 !wpa_use_akm_defined(sm->key_mgmt)) { 2310 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2311 "WPA: AP did not use the " 2312 "negotiated AES-128-CMAC"); 2313 goto out; 2314 } 2315 } else 2316 #endif /* CONFIG_IEEE80211W */ 2317 if (sm->pairwise_cipher == WPA_CIPHER_CCMP && 2318 !wpa_use_akm_defined(sm->key_mgmt) && 2319 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 2320 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2321 "WPA: CCMP is used, but EAPOL-Key " 2322 "descriptor version (%d) is not 2", ver); 2323 if (sm->group_cipher != WPA_CIPHER_CCMP && 2324 !(key_info & WPA_KEY_INFO_KEY_TYPE)) { 2325 /* Earlier versions of IEEE 802.11i did not explicitly 2326 * require version 2 descriptor for all EAPOL-Key 2327 * packets, so allow group keys to use version 1 if 2328 * CCMP is not used for them. */ 2329 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2330 "WPA: Backwards compatibility: allow invalid " 2331 "version for non-CCMP group keys"); 2332 } else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) { 2333 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2334 "WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used"); 2335 } else 2336 goto out; 2337 } else if (sm->pairwise_cipher == WPA_CIPHER_GCMP && 2338 !wpa_use_akm_defined(sm->key_mgmt) && 2339 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) { 2340 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2341 "WPA: GCMP is used, but EAPOL-Key " 2342 "descriptor version (%d) is not 2", ver); 2343 goto out; 2344 } 2345 2346 if (sm->rx_replay_counter_set && 2347 os_memcmp(key->replay_counter, sm->rx_replay_counter, 2348 WPA_REPLAY_COUNTER_LEN) <= 0) { 2349 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2350 "WPA: EAPOL-Key Replay Counter did not increase - " 2351 "dropping packet"); 2352 goto out; 2353 } 2354 2355 if (key_info & WPA_KEY_INFO_SMK_MESSAGE) { 2356 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2357 "WPA: Unsupported SMK bit in key_info"); 2358 goto out; 2359 } 2360 2361 if (!(key_info & WPA_KEY_INFO_ACK)) { 2362 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2363 "WPA: No Ack bit in key_info"); 2364 goto out; 2365 } 2366 2367 if (key_info & WPA_KEY_INFO_REQUEST) { 2368 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, 2369 "WPA: EAPOL-Key with Request bit - dropped"); 2370 goto out; 2371 } 2372 2373 if ((key_info & WPA_KEY_INFO_MIC) && 2374 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len)) 2375 goto out; 2376 2377 #ifdef CONFIG_FILS 2378 if (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) { 2379 if (wpa_supp_aead_decrypt(sm, tmp, data_len, &key_data_len)) 2380 goto out; 2381 } 2382 #endif /* CONFIG_FILS */ 2383 2384 if ((sm->proto == WPA_PROTO_RSN || sm->proto == WPA_PROTO_OSEN) && 2385 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && mic_len) { 2386 /* 2387 * Only decrypt the Key Data field if the frame's authenticity 2388 * was verified. When using AES-SIV (FILS), the MIC flag is not 2389 * set, so this check should only be performed if mic_len != 0 2390 * which is the case in this code branch. 2391 */ 2392 if (!(key_info & WPA_KEY_INFO_MIC)) { 2393 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2394 "WPA: Ignore EAPOL-Key with encrypted but unauthenticated data"); 2395 goto out; 2396 } 2397 if (wpa_supplicant_decrypt_key_data(sm, key, mic_len, 2398 ver, key_data, 2399 &key_data_len)) 2400 goto out; 2401 } 2402 2403 if (key_info & WPA_KEY_INFO_KEY_TYPE) { 2404 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) { 2405 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2406 "WPA: Ignored EAPOL-Key (Pairwise) with " 2407 "non-zero key index"); 2408 goto out; 2409 } 2410 if (key_info & (WPA_KEY_INFO_MIC | 2411 WPA_KEY_INFO_ENCR_KEY_DATA)) { 2412 /* 3/4 4-Way Handshake */ 2413 wpa_supplicant_process_3_of_4(sm, key, ver, key_data, 2414 key_data_len); 2415 } else { 2416 /* 1/4 4-Way Handshake */ 2417 wpa_supplicant_process_1_of_4(sm, src_addr, key, 2418 ver, key_data, 2419 key_data_len); 2420 } 2421 } else { 2422 if ((mic_len && (key_info & WPA_KEY_INFO_MIC)) || 2423 (!mic_len && (key_info & WPA_KEY_INFO_ENCR_KEY_DATA))) { 2424 /* 1/2 Group Key Handshake */ 2425 wpa_supplicant_process_1_of_2(sm, src_addr, key, 2426 key_data, key_data_len, 2427 ver); 2428 } else { 2429 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 2430 "WPA: EAPOL-Key (Group) without Mic/Encr bit - " 2431 "dropped"); 2432 } 2433 } 2434 2435 ret = 1; 2436 2437 out: 2438 bin_clear_free(tmp, data_len); 2439 return ret; 2440 } 2441 2442 2443 #ifdef CONFIG_CTRL_IFACE 2444 static u32 wpa_key_mgmt_suite(struct wpa_sm *sm) 2445 { 2446 switch (sm->key_mgmt) { 2447 case WPA_KEY_MGMT_IEEE8021X: 2448 return ((sm->proto == WPA_PROTO_RSN || 2449 sm->proto == WPA_PROTO_OSEN) ? 2450 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X : 2451 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 2452 case WPA_KEY_MGMT_PSK: 2453 return (sm->proto == WPA_PROTO_RSN ? 2454 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X : 2455 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 2456 #ifdef CONFIG_IEEE80211R 2457 case WPA_KEY_MGMT_FT_IEEE8021X: 2458 return RSN_AUTH_KEY_MGMT_FT_802_1X; 2459 case WPA_KEY_MGMT_FT_PSK: 2460 return RSN_AUTH_KEY_MGMT_FT_PSK; 2461 #endif /* CONFIG_IEEE80211R */ 2462 #ifdef CONFIG_IEEE80211W 2463 case WPA_KEY_MGMT_IEEE8021X_SHA256: 2464 return RSN_AUTH_KEY_MGMT_802_1X_SHA256; 2465 case WPA_KEY_MGMT_PSK_SHA256: 2466 return RSN_AUTH_KEY_MGMT_PSK_SHA256; 2467 #endif /* CONFIG_IEEE80211W */ 2468 case WPA_KEY_MGMT_CCKM: 2469 return (sm->proto == WPA_PROTO_RSN ? 2470 RSN_AUTH_KEY_MGMT_CCKM: 2471 WPA_AUTH_KEY_MGMT_CCKM); 2472 case WPA_KEY_MGMT_WPA_NONE: 2473 return WPA_AUTH_KEY_MGMT_NONE; 2474 case WPA_KEY_MGMT_IEEE8021X_SUITE_B: 2475 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; 2476 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: 2477 return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; 2478 default: 2479 return 0; 2480 } 2481 } 2482 2483 2484 #define RSN_SUITE "%02x-%02x-%02x-%d" 2485 #define RSN_SUITE_ARG(s) \ 2486 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff 2487 2488 /** 2489 * wpa_sm_get_mib - Dump text list of MIB entries 2490 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2491 * @buf: Buffer for the list 2492 * @buflen: Length of the buffer 2493 * Returns: Number of bytes written to buffer 2494 * 2495 * This function is used fetch dot11 MIB variables. 2496 */ 2497 int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen) 2498 { 2499 char pmkid_txt[PMKID_LEN * 2 + 1]; 2500 int rsna, ret; 2501 size_t len; 2502 2503 if (sm->cur_pmksa) { 2504 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt), 2505 sm->cur_pmksa->pmkid, PMKID_LEN); 2506 } else 2507 pmkid_txt[0] = '\0'; 2508 2509 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) || 2510 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) && 2511 sm->proto == WPA_PROTO_RSN) 2512 rsna = 1; 2513 else 2514 rsna = 0; 2515 2516 ret = os_snprintf(buf, buflen, 2517 "dot11RSNAOptionImplemented=TRUE\n" 2518 "dot11RSNAPreauthenticationImplemented=TRUE\n" 2519 "dot11RSNAEnabled=%s\n" 2520 "dot11RSNAPreauthenticationEnabled=%s\n" 2521 "dot11RSNAConfigVersion=%d\n" 2522 "dot11RSNAConfigPairwiseKeysSupported=5\n" 2523 "dot11RSNAConfigGroupCipherSize=%d\n" 2524 "dot11RSNAConfigPMKLifetime=%d\n" 2525 "dot11RSNAConfigPMKReauthThreshold=%d\n" 2526 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n" 2527 "dot11RSNAConfigSATimeout=%d\n", 2528 rsna ? "TRUE" : "FALSE", 2529 rsna ? "TRUE" : "FALSE", 2530 RSN_VERSION, 2531 wpa_cipher_key_len(sm->group_cipher) * 8, 2532 sm->dot11RSNAConfigPMKLifetime, 2533 sm->dot11RSNAConfigPMKReauthThreshold, 2534 sm->dot11RSNAConfigSATimeout); 2535 if (os_snprintf_error(buflen, ret)) 2536 return 0; 2537 len = ret; 2538 2539 ret = os_snprintf( 2540 buf + len, buflen - len, 2541 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n" 2542 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n" 2543 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n" 2544 "dot11RSNAPMKIDUsed=%s\n" 2545 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n" 2546 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n" 2547 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n" 2548 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n" 2549 "dot11RSNA4WayHandshakeFailures=%u\n", 2550 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 2551 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2552 sm->pairwise_cipher)), 2553 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2554 sm->group_cipher)), 2555 pmkid_txt, 2556 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)), 2557 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2558 sm->pairwise_cipher)), 2559 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto, 2560 sm->group_cipher)), 2561 sm->dot11RSNA4WayHandshakeFailures); 2562 if (!os_snprintf_error(buflen - len, ret)) 2563 len += ret; 2564 2565 return (int) len; 2566 } 2567 #endif /* CONFIG_CTRL_IFACE */ 2568 2569 2570 static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry, 2571 void *ctx, enum pmksa_free_reason reason) 2572 { 2573 struct wpa_sm *sm = ctx; 2574 int deauth = 0; 2575 2576 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: " 2577 MACSTR " reason=%d", MAC2STR(entry->aa), reason); 2578 2579 if (sm->cur_pmksa == entry) { 2580 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2581 "RSN: %s current PMKSA entry", 2582 reason == PMKSA_REPLACE ? "replaced" : "removed"); 2583 pmksa_cache_clear_current(sm); 2584 2585 /* 2586 * If an entry is simply being replaced, there's no need to 2587 * deauthenticate because it will be immediately re-added. 2588 * This happens when EAP authentication is completed again 2589 * (reauth or failed PMKSA caching attempt). 2590 */ 2591 if (reason != PMKSA_REPLACE) 2592 deauth = 1; 2593 } 2594 2595 if (reason == PMKSA_EXPIRE && 2596 (sm->pmk_len == entry->pmk_len && 2597 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) { 2598 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2599 "RSN: deauthenticating due to expired PMK"); 2600 pmksa_cache_clear_current(sm); 2601 deauth = 1; 2602 } 2603 2604 if (deauth) { 2605 sm->pmk_len = 0; 2606 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 2607 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED); 2608 } 2609 } 2610 2611 2612 /** 2613 * wpa_sm_init - Initialize WPA state machine 2614 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer 2615 * Returns: Pointer to the allocated WPA state machine data 2616 * 2617 * This function is used to allocate a new WPA state machine and the returned 2618 * value is passed to all WPA state machine calls. 2619 */ 2620 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx) 2621 { 2622 struct wpa_sm *sm; 2623 2624 sm = os_zalloc(sizeof(*sm)); 2625 if (sm == NULL) 2626 return NULL; 2627 dl_list_init(&sm->pmksa_candidates); 2628 sm->renew_snonce = 1; 2629 sm->ctx = ctx; 2630 2631 sm->dot11RSNAConfigPMKLifetime = 43200; 2632 sm->dot11RSNAConfigPMKReauthThreshold = 70; 2633 sm->dot11RSNAConfigSATimeout = 60; 2634 2635 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm); 2636 if (sm->pmksa == NULL) { 2637 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR, 2638 "RSN: PMKSA cache initialization failed"); 2639 os_free(sm); 2640 return NULL; 2641 } 2642 2643 return sm; 2644 } 2645 2646 2647 /** 2648 * wpa_sm_deinit - Deinitialize WPA state machine 2649 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2650 */ 2651 void wpa_sm_deinit(struct wpa_sm *sm) 2652 { 2653 if (sm == NULL) 2654 return; 2655 pmksa_cache_deinit(sm->pmksa); 2656 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2657 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2658 os_free(sm->assoc_wpa_ie); 2659 os_free(sm->ap_wpa_ie); 2660 os_free(sm->ap_rsn_ie); 2661 wpa_sm_drop_sa(sm); 2662 os_free(sm->ctx); 2663 #ifdef CONFIG_IEEE80211R 2664 os_free(sm->assoc_resp_ies); 2665 #endif /* CONFIG_IEEE80211R */ 2666 #ifdef CONFIG_TESTING_OPTIONS 2667 wpabuf_free(sm->test_assoc_ie); 2668 #endif /* CONFIG_TESTING_OPTIONS */ 2669 #ifdef CONFIG_FILS_SK_PFS 2670 crypto_ecdh_deinit(sm->fils_ecdh); 2671 #endif /* CONFIG_FILS_SK_PFS */ 2672 #ifdef CONFIG_FILS 2673 wpabuf_free(sm->fils_ft_ies); 2674 #endif /* CONFIG_FILS */ 2675 #ifdef CONFIG_OWE 2676 crypto_ecdh_deinit(sm->owe_ecdh); 2677 #endif /* CONFIG_OWE */ 2678 #ifdef CONFIG_DPP2 2679 wpabuf_clear_free(sm->dpp_z); 2680 #endif /* CONFIG_DPP2 */ 2681 os_free(sm); 2682 } 2683 2684 2685 /** 2686 * wpa_sm_notify_assoc - Notify WPA state machine about association 2687 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2688 * @bssid: The BSSID of the new association 2689 * 2690 * This function is called to let WPA state machine know that the connection 2691 * was established. 2692 */ 2693 void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) 2694 { 2695 int clear_keys = 1; 2696 2697 if (sm == NULL) 2698 return; 2699 2700 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 2701 "WPA: Association event - clear replay counter"); 2702 os_memcpy(sm->bssid, bssid, ETH_ALEN); 2703 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN); 2704 sm->rx_replay_counter_set = 0; 2705 sm->renew_snonce = 1; 2706 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0) 2707 rsn_preauth_deinit(sm); 2708 2709 #ifdef CONFIG_IEEE80211R 2710 if (wpa_ft_is_completed(sm)) { 2711 /* 2712 * Clear portValid to kick EAPOL state machine to re-enter 2713 * AUTHENTICATED state to get the EAPOL port Authorized. 2714 */ 2715 eapol_sm_notify_portValid(sm->eapol, FALSE); 2716 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2717 2718 /* Prepare for the next transition */ 2719 wpa_ft_prepare_auth_request(sm, NULL); 2720 2721 clear_keys = 0; 2722 sm->ft_protocol = 1; 2723 } else { 2724 sm->ft_protocol = 0; 2725 } 2726 #endif /* CONFIG_IEEE80211R */ 2727 #ifdef CONFIG_FILS 2728 if (sm->fils_completed) { 2729 /* 2730 * Clear portValid to kick EAPOL state machine to re-enter 2731 * AUTHENTICATED state to get the EAPOL port Authorized. 2732 */ 2733 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1); 2734 clear_keys = 0; 2735 } 2736 #endif /* CONFIG_FILS */ 2737 2738 if (clear_keys) { 2739 /* 2740 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if 2741 * this is not part of a Fast BSS Transition. 2742 */ 2743 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK"); 2744 sm->ptk_set = 0; 2745 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 2746 sm->tptk_set = 0; 2747 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 2748 os_memset(&sm->gtk, 0, sizeof(sm->gtk)); 2749 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); 2750 #ifdef CONFIG_IEEE80211W 2751 os_memset(&sm->igtk, 0, sizeof(sm->igtk)); 2752 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); 2753 #endif /* CONFIG_IEEE80211W */ 2754 } 2755 2756 #ifdef CONFIG_TDLS 2757 wpa_tdls_assoc(sm); 2758 #endif /* CONFIG_TDLS */ 2759 2760 #ifdef CONFIG_P2P 2761 os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr)); 2762 #endif /* CONFIG_P2P */ 2763 } 2764 2765 2766 /** 2767 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation 2768 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2769 * 2770 * This function is called to let WPA state machine know that the connection 2771 * was lost. This will abort any existing pre-authentication session. 2772 */ 2773 void wpa_sm_notify_disassoc(struct wpa_sm *sm) 2774 { 2775 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL); 2776 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL); 2777 rsn_preauth_deinit(sm); 2778 pmksa_cache_clear_current(sm); 2779 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE) 2780 sm->dot11RSNA4WayHandshakeFailures++; 2781 #ifdef CONFIG_TDLS 2782 wpa_tdls_disassoc(sm); 2783 #endif /* CONFIG_TDLS */ 2784 #ifdef CONFIG_FILS 2785 sm->fils_completed = 0; 2786 #endif /* CONFIG_FILS */ 2787 #ifdef CONFIG_IEEE80211R 2788 sm->ft_reassoc_completed = 0; 2789 sm->ft_protocol = 0; 2790 #endif /* CONFIG_IEEE80211R */ 2791 2792 /* Keys are not needed in the WPA state machine anymore */ 2793 wpa_sm_drop_sa(sm); 2794 2795 sm->msg_3_of_4_ok = 0; 2796 os_memset(sm->bssid, 0, ETH_ALEN); 2797 } 2798 2799 2800 /** 2801 * wpa_sm_set_pmk - Set PMK 2802 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2803 * @pmk: The new PMK 2804 * @pmk_len: The length of the new PMK in bytes 2805 * @pmkid: Calculated PMKID 2806 * @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK 2807 * 2808 * Configure the PMK for WPA state machine. 2809 */ 2810 void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, 2811 const u8 *pmkid, const u8 *bssid) 2812 { 2813 if (sm == NULL) 2814 return; 2815 2816 wpa_hexdump_key(MSG_DEBUG, "WPA: Set PMK based on external data", 2817 pmk, pmk_len); 2818 sm->pmk_len = pmk_len; 2819 os_memcpy(sm->pmk, pmk, pmk_len); 2820 2821 #ifdef CONFIG_IEEE80211R 2822 /* Set XXKey to be PSK for FT key derivation */ 2823 sm->xxkey_len = pmk_len; 2824 os_memcpy(sm->xxkey, pmk, pmk_len); 2825 #endif /* CONFIG_IEEE80211R */ 2826 2827 if (bssid) { 2828 pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, 2829 bssid, sm->own_addr, 2830 sm->network_ctx, sm->key_mgmt, NULL); 2831 } 2832 } 2833 2834 2835 /** 2836 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA 2837 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2838 * 2839 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK 2840 * will be cleared. 2841 */ 2842 void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm) 2843 { 2844 if (sm == NULL) 2845 return; 2846 2847 if (sm->cur_pmksa) { 2848 wpa_hexdump_key(MSG_DEBUG, 2849 "WPA: Set PMK based on current PMKSA", 2850 sm->cur_pmksa->pmk, sm->cur_pmksa->pmk_len); 2851 sm->pmk_len = sm->cur_pmksa->pmk_len; 2852 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len); 2853 } else { 2854 wpa_printf(MSG_DEBUG, "WPA: No current PMKSA - clear PMK"); 2855 sm->pmk_len = 0; 2856 os_memset(sm->pmk, 0, PMK_LEN_MAX); 2857 } 2858 } 2859 2860 2861 /** 2862 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled 2863 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2864 * @fast_reauth: Whether fast reauthentication (EAP) is allowed 2865 */ 2866 void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth) 2867 { 2868 if (sm) 2869 sm->fast_reauth = fast_reauth; 2870 } 2871 2872 2873 /** 2874 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks 2875 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2876 * @scard_ctx: Context pointer for smartcard related callback functions 2877 */ 2878 void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx) 2879 { 2880 if (sm == NULL) 2881 return; 2882 sm->scard_ctx = scard_ctx; 2883 if (sm->preauth_eapol) 2884 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx); 2885 } 2886 2887 2888 /** 2889 * wpa_sm_set_config - Notification of current configration change 2890 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2891 * @config: Pointer to current network configuration 2892 * 2893 * Notify WPA state machine that configuration has changed. config will be 2894 * stored as a backpointer to network configuration. This can be %NULL to clear 2895 * the stored pointed. 2896 */ 2897 void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config) 2898 { 2899 if (!sm) 2900 return; 2901 2902 if (config) { 2903 sm->network_ctx = config->network_ctx; 2904 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher; 2905 sm->proactive_key_caching = config->proactive_key_caching; 2906 sm->eap_workaround = config->eap_workaround; 2907 sm->eap_conf_ctx = config->eap_conf_ctx; 2908 if (config->ssid) { 2909 os_memcpy(sm->ssid, config->ssid, config->ssid_len); 2910 sm->ssid_len = config->ssid_len; 2911 } else 2912 sm->ssid_len = 0; 2913 sm->wpa_ptk_rekey = config->wpa_ptk_rekey; 2914 sm->p2p = config->p2p; 2915 sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation; 2916 #ifdef CONFIG_FILS 2917 if (config->fils_cache_id) { 2918 sm->fils_cache_id_set = 1; 2919 os_memcpy(sm->fils_cache_id, config->fils_cache_id, 2920 FILS_CACHE_ID_LEN); 2921 } else { 2922 sm->fils_cache_id_set = 0; 2923 } 2924 #endif /* CONFIG_FILS */ 2925 } else { 2926 sm->network_ctx = NULL; 2927 sm->allowed_pairwise_cipher = 0; 2928 sm->proactive_key_caching = 0; 2929 sm->eap_workaround = 0; 2930 sm->eap_conf_ctx = NULL; 2931 sm->ssid_len = 0; 2932 sm->wpa_ptk_rekey = 0; 2933 sm->p2p = 0; 2934 sm->wpa_rsc_relaxation = 0; 2935 } 2936 } 2937 2938 2939 /** 2940 * wpa_sm_set_own_addr - Set own MAC address 2941 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2942 * @addr: Own MAC address 2943 */ 2944 void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr) 2945 { 2946 if (sm) 2947 os_memcpy(sm->own_addr, addr, ETH_ALEN); 2948 } 2949 2950 2951 /** 2952 * wpa_sm_set_ifname - Set network interface name 2953 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2954 * @ifname: Interface name 2955 * @bridge_ifname: Optional bridge interface name (for pre-auth) 2956 */ 2957 void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname, 2958 const char *bridge_ifname) 2959 { 2960 if (sm) { 2961 sm->ifname = ifname; 2962 sm->bridge_ifname = bridge_ifname; 2963 } 2964 } 2965 2966 2967 /** 2968 * wpa_sm_set_eapol - Set EAPOL state machine pointer 2969 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2970 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init() 2971 */ 2972 void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol) 2973 { 2974 if (sm) 2975 sm->eapol = eapol; 2976 } 2977 2978 2979 /** 2980 * wpa_sm_set_param - Set WPA state machine parameters 2981 * @sm: Pointer to WPA state machine data from wpa_sm_init() 2982 * @param: Parameter field 2983 * @value: Parameter value 2984 * Returns: 0 on success, -1 on failure 2985 */ 2986 int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param, 2987 unsigned int value) 2988 { 2989 int ret = 0; 2990 2991 if (sm == NULL) 2992 return -1; 2993 2994 switch (param) { 2995 case RSNA_PMK_LIFETIME: 2996 if (value > 0) 2997 sm->dot11RSNAConfigPMKLifetime = value; 2998 else 2999 ret = -1; 3000 break; 3001 case RSNA_PMK_REAUTH_THRESHOLD: 3002 if (value > 0 && value <= 100) 3003 sm->dot11RSNAConfigPMKReauthThreshold = value; 3004 else 3005 ret = -1; 3006 break; 3007 case RSNA_SA_TIMEOUT: 3008 if (value > 0) 3009 sm->dot11RSNAConfigSATimeout = value; 3010 else 3011 ret = -1; 3012 break; 3013 case WPA_PARAM_PROTO: 3014 sm->proto = value; 3015 break; 3016 case WPA_PARAM_PAIRWISE: 3017 sm->pairwise_cipher = value; 3018 break; 3019 case WPA_PARAM_GROUP: 3020 sm->group_cipher = value; 3021 break; 3022 case WPA_PARAM_KEY_MGMT: 3023 sm->key_mgmt = value; 3024 break; 3025 #ifdef CONFIG_IEEE80211W 3026 case WPA_PARAM_MGMT_GROUP: 3027 sm->mgmt_group_cipher = value; 3028 break; 3029 #endif /* CONFIG_IEEE80211W */ 3030 case WPA_PARAM_RSN_ENABLED: 3031 sm->rsn_enabled = value; 3032 break; 3033 case WPA_PARAM_MFP: 3034 sm->mfp = value; 3035 break; 3036 case WPA_PARAM_OCV: 3037 sm->ocv = value; 3038 break; 3039 default: 3040 break; 3041 } 3042 3043 return ret; 3044 } 3045 3046 3047 /** 3048 * wpa_sm_get_status - Get WPA state machine 3049 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3050 * @buf: Buffer for status information 3051 * @buflen: Maximum buffer length 3052 * @verbose: Whether to include verbose status information 3053 * Returns: Number of bytes written to buf. 3054 * 3055 * Query WPA state machine for status information. This function fills in 3056 * a text area with current status information. If the buffer (buf) is not 3057 * large enough, status information will be truncated to fit the buffer. 3058 */ 3059 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen, 3060 int verbose) 3061 { 3062 char *pos = buf, *end = buf + buflen; 3063 int ret; 3064 3065 ret = os_snprintf(pos, end - pos, 3066 "pairwise_cipher=%s\n" 3067 "group_cipher=%s\n" 3068 "key_mgmt=%s\n", 3069 wpa_cipher_txt(sm->pairwise_cipher), 3070 wpa_cipher_txt(sm->group_cipher), 3071 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto)); 3072 if (os_snprintf_error(end - pos, ret)) 3073 return pos - buf; 3074 pos += ret; 3075 3076 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) { 3077 struct wpa_ie_data rsn; 3078 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) 3079 >= 0 && 3080 rsn.capabilities & (WPA_CAPABILITY_MFPR | 3081 WPA_CAPABILITY_MFPC)) { 3082 ret = os_snprintf(pos, end - pos, "pmf=%d\n" 3083 "mgmt_group_cipher=%s\n", 3084 (rsn.capabilities & 3085 WPA_CAPABILITY_MFPR) ? 2 : 1, 3086 wpa_cipher_txt( 3087 sm->mgmt_group_cipher)); 3088 if (os_snprintf_error(end - pos, ret)) 3089 return pos - buf; 3090 pos += ret; 3091 } 3092 } 3093 3094 return pos - buf; 3095 } 3096 3097 3098 int wpa_sm_pmf_enabled(struct wpa_sm *sm) 3099 { 3100 struct wpa_ie_data rsn; 3101 3102 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie) 3103 return 0; 3104 3105 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 && 3106 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC)) 3107 return 1; 3108 3109 return 0; 3110 } 3111 3112 3113 int wpa_sm_ocv_enabled(struct wpa_sm *sm) 3114 { 3115 struct wpa_ie_data rsn; 3116 3117 if (!sm->ocv || !sm->ap_rsn_ie) 3118 return 0; 3119 3120 return wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, 3121 &rsn) >= 0 && 3122 (rsn.capabilities & WPA_CAPABILITY_OCVC); 3123 } 3124 3125 3126 /** 3127 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration 3128 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3129 * @wpa_ie: Pointer to buffer for WPA/RSN IE 3130 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer 3131 * Returns: 0 on success, -1 on failure 3132 */ 3133 int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie, 3134 size_t *wpa_ie_len) 3135 { 3136 int res; 3137 3138 if (sm == NULL) 3139 return -1; 3140 3141 #ifdef CONFIG_TESTING_OPTIONS 3142 if (sm->test_assoc_ie) { 3143 wpa_printf(MSG_DEBUG, 3144 "TESTING: Replace association WPA/RSN IE"); 3145 if (*wpa_ie_len < wpabuf_len(sm->test_assoc_ie)) 3146 return -1; 3147 os_memcpy(wpa_ie, wpabuf_head(sm->test_assoc_ie), 3148 wpabuf_len(sm->test_assoc_ie)); 3149 res = wpabuf_len(sm->test_assoc_ie); 3150 } else 3151 #endif /* CONFIG_TESTING_OPTIONS */ 3152 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len); 3153 if (res < 0) 3154 return -1; 3155 *wpa_ie_len = res; 3156 3157 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default", 3158 wpa_ie, *wpa_ie_len); 3159 3160 if (sm->assoc_wpa_ie == NULL) { 3161 /* 3162 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets 3163 * the correct version of the IE even if PMKSA caching is 3164 * aborted (which would remove PMKID from IE generation). 3165 */ 3166 sm->assoc_wpa_ie = os_memdup(wpa_ie, *wpa_ie_len); 3167 if (sm->assoc_wpa_ie == NULL) 3168 return -1; 3169 3170 sm->assoc_wpa_ie_len = *wpa_ie_len; 3171 } else { 3172 wpa_hexdump(MSG_DEBUG, 3173 "WPA: Leave previously set WPA IE default", 3174 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); 3175 } 3176 3177 return 0; 3178 } 3179 3180 3181 /** 3182 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq 3183 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3184 * @ie: Pointer to IE data (starting from id) 3185 * @len: IE length 3186 * Returns: 0 on success, -1 on failure 3187 * 3188 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association 3189 * Request frame. The IE will be used to override the default value generated 3190 * with wpa_sm_set_assoc_wpa_ie_default(). 3191 */ 3192 int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 3193 { 3194 if (sm == NULL) 3195 return -1; 3196 3197 os_free(sm->assoc_wpa_ie); 3198 if (ie == NULL || len == 0) { 3199 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 3200 "WPA: clearing own WPA/RSN IE"); 3201 sm->assoc_wpa_ie = NULL; 3202 sm->assoc_wpa_ie_len = 0; 3203 } else { 3204 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len); 3205 sm->assoc_wpa_ie = os_memdup(ie, len); 3206 if (sm->assoc_wpa_ie == NULL) 3207 return -1; 3208 3209 sm->assoc_wpa_ie_len = len; 3210 } 3211 3212 return 0; 3213 } 3214 3215 3216 /** 3217 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp 3218 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3219 * @ie: Pointer to IE data (starting from id) 3220 * @len: IE length 3221 * Returns: 0 on success, -1 on failure 3222 * 3223 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response 3224 * frame. 3225 */ 3226 int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 3227 { 3228 if (sm == NULL) 3229 return -1; 3230 3231 os_free(sm->ap_wpa_ie); 3232 if (ie == NULL || len == 0) { 3233 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 3234 "WPA: clearing AP WPA IE"); 3235 sm->ap_wpa_ie = NULL; 3236 sm->ap_wpa_ie_len = 0; 3237 } else { 3238 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len); 3239 sm->ap_wpa_ie = os_memdup(ie, len); 3240 if (sm->ap_wpa_ie == NULL) 3241 return -1; 3242 3243 sm->ap_wpa_ie_len = len; 3244 } 3245 3246 return 0; 3247 } 3248 3249 3250 /** 3251 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp 3252 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3253 * @ie: Pointer to IE data (starting from id) 3254 * @len: IE length 3255 * Returns: 0 on success, -1 on failure 3256 * 3257 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response 3258 * frame. 3259 */ 3260 int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len) 3261 { 3262 if (sm == NULL) 3263 return -1; 3264 3265 os_free(sm->ap_rsn_ie); 3266 if (ie == NULL || len == 0) { 3267 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 3268 "WPA: clearing AP RSN IE"); 3269 sm->ap_rsn_ie = NULL; 3270 sm->ap_rsn_ie_len = 0; 3271 } else { 3272 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len); 3273 sm->ap_rsn_ie = os_memdup(ie, len); 3274 if (sm->ap_rsn_ie == NULL) 3275 return -1; 3276 3277 sm->ap_rsn_ie_len = len; 3278 } 3279 3280 return 0; 3281 } 3282 3283 3284 /** 3285 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE 3286 * @sm: Pointer to WPA state machine data from wpa_sm_init() 3287 * @data: Pointer to data area for parsing results 3288 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure 3289 * 3290 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the 3291 * parsed data into data. 3292 */ 3293 int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data) 3294 { 3295 if (sm == NULL) 3296 return -1; 3297 3298 if (sm->assoc_wpa_ie == NULL) { 3299 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, 3300 "WPA: No WPA/RSN IE available from association info"); 3301 return -1; 3302 } 3303 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data)) 3304 return -2; 3305 return 0; 3306 } 3307 3308 3309 int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len) 3310 { 3311 return pmksa_cache_list(sm->pmksa, buf, len); 3312 } 3313 3314 3315 struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm) 3316 { 3317 return pmksa_cache_head(sm->pmksa); 3318 } 3319 3320 3321 struct rsn_pmksa_cache_entry * 3322 wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm, 3323 struct rsn_pmksa_cache_entry * entry) 3324 { 3325 return pmksa_cache_add_entry(sm->pmksa, entry); 3326 } 3327 3328 3329 void wpa_sm_pmksa_cache_add(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len, 3330 const u8 *pmkid, const u8 *bssid, 3331 const u8 *fils_cache_id) 3332 { 3333 sm->cur_pmksa = pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0, 3334 bssid, sm->own_addr, sm->network_ctx, 3335 sm->key_mgmt, fils_cache_id); 3336 } 3337 3338 3339 int wpa_sm_pmksa_exists(struct wpa_sm *sm, const u8 *bssid, 3340 const void *network_ctx) 3341 { 3342 return pmksa_cache_get(sm->pmksa, bssid, NULL, network_ctx, 0) != NULL; 3343 } 3344 3345 3346 void wpa_sm_drop_sa(struct wpa_sm *sm) 3347 { 3348 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK"); 3349 sm->ptk_set = 0; 3350 sm->tptk_set = 0; 3351 sm->pmk_len = 0; 3352 os_memset(sm->pmk, 0, sizeof(sm->pmk)); 3353 os_memset(&sm->ptk, 0, sizeof(sm->ptk)); 3354 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 3355 os_memset(&sm->gtk, 0, sizeof(sm->gtk)); 3356 os_memset(&sm->gtk_wnm_sleep, 0, sizeof(sm->gtk_wnm_sleep)); 3357 #ifdef CONFIG_IEEE80211W 3358 os_memset(&sm->igtk, 0, sizeof(sm->igtk)); 3359 os_memset(&sm->igtk_wnm_sleep, 0, sizeof(sm->igtk_wnm_sleep)); 3360 #endif /* CONFIG_IEEE80211W */ 3361 #ifdef CONFIG_IEEE80211R 3362 os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); 3363 sm->xxkey_len = 0; 3364 os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0)); 3365 sm->pmk_r0_len = 0; 3366 os_memset(sm->pmk_r1, 0, sizeof(sm->pmk_r1)); 3367 sm->pmk_r1_len = 0; 3368 #endif /* CONFIG_IEEE80211R */ 3369 } 3370 3371 3372 int wpa_sm_has_ptk(struct wpa_sm *sm) 3373 { 3374 if (sm == NULL) 3375 return 0; 3376 return sm->ptk_set; 3377 } 3378 3379 3380 void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr) 3381 { 3382 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN); 3383 } 3384 3385 3386 void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx) 3387 { 3388 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0); 3389 } 3390 3391 3392 #ifdef CONFIG_WNM 3393 int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf) 3394 { 3395 u16 keyinfo; 3396 u8 keylen; /* plaintext key len */ 3397 u8 *key_rsc; 3398 3399 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) { 3400 struct wpa_gtk_data gd; 3401 3402 os_memset(&gd, 0, sizeof(gd)); 3403 keylen = wpa_cipher_key_len(sm->group_cipher); 3404 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher); 3405 gd.alg = wpa_cipher_to_alg(sm->group_cipher); 3406 if (gd.alg == WPA_ALG_NONE) { 3407 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite"); 3408 return -1; 3409 } 3410 3411 key_rsc = buf + 5; 3412 keyinfo = WPA_GET_LE16(buf + 2); 3413 gd.gtk_len = keylen; 3414 if (gd.gtk_len != buf[4]) { 3415 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d", 3416 gd.gtk_len, buf[4]); 3417 return -1; 3418 } 3419 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */ 3420 gd.tx = wpa_supplicant_gtk_tx_bit_workaround( 3421 sm, !!(keyinfo & WPA_KEY_INFO_TXRX)); 3422 3423 os_memcpy(gd.gtk, buf + 13, gd.gtk_len); 3424 3425 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)", 3426 gd.gtk, gd.gtk_len); 3427 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc, 1)) { 3428 os_memset(&gd, 0, sizeof(gd)); 3429 wpa_printf(MSG_DEBUG, "Failed to install the GTK in " 3430 "WNM mode"); 3431 return -1; 3432 } 3433 os_memset(&gd, 0, sizeof(gd)); 3434 #ifdef CONFIG_IEEE80211W 3435 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { 3436 const struct wpa_igtk_kde *igtk; 3437 3438 igtk = (const struct wpa_igtk_kde *) (buf + 2); 3439 if (wpa_supplicant_install_igtk(sm, igtk, 1) < 0) 3440 return -1; 3441 #endif /* CONFIG_IEEE80211W */ 3442 } else { 3443 wpa_printf(MSG_DEBUG, "Unknown element id"); 3444 return -1; 3445 } 3446 3447 return 0; 3448 } 3449 #endif /* CONFIG_WNM */ 3450 3451 3452 #ifdef CONFIG_P2P 3453 3454 int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf) 3455 { 3456 if (sm == NULL || WPA_GET_BE32(sm->p2p_ip_addr) == 0) 3457 return -1; 3458 os_memcpy(buf, sm->p2p_ip_addr, 3 * 4); 3459 return 0; 3460 } 3461 3462 #endif /* CONFIG_P2P */ 3463 3464 3465 void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter) 3466 { 3467 if (rx_replay_counter == NULL) 3468 return; 3469 3470 os_memcpy(sm->rx_replay_counter, rx_replay_counter, 3471 WPA_REPLAY_COUNTER_LEN); 3472 sm->rx_replay_counter_set = 1; 3473 wpa_printf(MSG_DEBUG, "Updated key replay counter"); 3474 } 3475 3476 3477 void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm, 3478 const u8 *ptk_kck, size_t ptk_kck_len, 3479 const u8 *ptk_kek, size_t ptk_kek_len) 3480 { 3481 if (ptk_kck && ptk_kck_len <= WPA_KCK_MAX_LEN) { 3482 os_memcpy(sm->ptk.kck, ptk_kck, ptk_kck_len); 3483 sm->ptk.kck_len = ptk_kck_len; 3484 wpa_printf(MSG_DEBUG, "Updated PTK KCK"); 3485 } 3486 if (ptk_kek && ptk_kek_len <= WPA_KEK_MAX_LEN) { 3487 os_memcpy(sm->ptk.kek, ptk_kek, ptk_kek_len); 3488 sm->ptk.kek_len = ptk_kek_len; 3489 wpa_printf(MSG_DEBUG, "Updated PTK KEK"); 3490 } 3491 sm->ptk_set = 1; 3492 } 3493 3494 3495 #ifdef CONFIG_TESTING_OPTIONS 3496 3497 void wpa_sm_set_test_assoc_ie(struct wpa_sm *sm, struct wpabuf *buf) 3498 { 3499 wpabuf_free(sm->test_assoc_ie); 3500 sm->test_assoc_ie = buf; 3501 } 3502 3503 3504 const u8 * wpa_sm_get_anonce(struct wpa_sm *sm) 3505 { 3506 return sm->anonce; 3507 } 3508 3509 #endif /* CONFIG_TESTING_OPTIONS */ 3510 3511 3512 unsigned int wpa_sm_get_key_mgmt(struct wpa_sm *sm) 3513 { 3514 return sm->key_mgmt; 3515 } 3516 3517 3518 #ifdef CONFIG_FILS 3519 3520 struct wpabuf * fils_build_auth(struct wpa_sm *sm, int dh_group, const u8 *md) 3521 { 3522 struct wpabuf *buf = NULL; 3523 struct wpabuf *erp_msg; 3524 struct wpabuf *pub = NULL; 3525 3526 erp_msg = eapol_sm_build_erp_reauth_start(sm->eapol); 3527 if (!erp_msg && !sm->cur_pmksa) { 3528 wpa_printf(MSG_DEBUG, 3529 "FILS: Neither ERP EAP-Initiate/Re-auth nor PMKSA cache entry is available - skip FILS"); 3530 goto fail; 3531 } 3532 3533 wpa_printf(MSG_DEBUG, "FILS: Try to use FILS (erp=%d pmksa_cache=%d)", 3534 erp_msg != NULL, sm->cur_pmksa != NULL); 3535 3536 sm->fils_completed = 0; 3537 3538 if (!sm->assoc_wpa_ie) { 3539 wpa_printf(MSG_INFO, "FILS: No own RSN IE set for FILS"); 3540 goto fail; 3541 } 3542 3543 if (random_get_bytes(sm->fils_nonce, FILS_NONCE_LEN) < 0 || 3544 random_get_bytes(sm->fils_session, FILS_SESSION_LEN) < 0) 3545 goto fail; 3546 3547 wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Nonce", 3548 sm->fils_nonce, FILS_NONCE_LEN); 3549 wpa_hexdump(MSG_DEBUG, "FILS: Generated FILS Session", 3550 sm->fils_session, FILS_SESSION_LEN); 3551 3552 #ifdef CONFIG_FILS_SK_PFS 3553 sm->fils_dh_group = dh_group; 3554 if (dh_group) { 3555 crypto_ecdh_deinit(sm->fils_ecdh); 3556 sm->fils_ecdh = crypto_ecdh_init(dh_group); 3557 if (!sm->fils_ecdh) { 3558 wpa_printf(MSG_INFO, 3559 "FILS: Could not initialize ECDH with group %d", 3560 dh_group); 3561 goto fail; 3562 } 3563 pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1); 3564 if (!pub) 3565 goto fail; 3566 wpa_hexdump_buf(MSG_DEBUG, "FILS: Element (DH public key)", 3567 pub); 3568 sm->fils_dh_elem_len = wpabuf_len(pub); 3569 } 3570 #endif /* CONFIG_FILS_SK_PFS */ 3571 3572 buf = wpabuf_alloc(1000 + sm->assoc_wpa_ie_len + 3573 (pub ? wpabuf_len(pub) : 0)); 3574 if (!buf) 3575 goto fail; 3576 3577 /* Fields following the Authentication algorithm number field */ 3578 3579 /* Authentication Transaction seq# */ 3580 wpabuf_put_le16(buf, 1); 3581 3582 /* Status Code */ 3583 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); 3584 3585 /* TODO: FILS PK */ 3586 #ifdef CONFIG_FILS_SK_PFS 3587 if (dh_group) { 3588 /* Finite Cyclic Group */ 3589 wpabuf_put_le16(buf, dh_group); 3590 /* Element */ 3591 wpabuf_put_buf(buf, pub); 3592 } 3593 #endif /* CONFIG_FILS_SK_PFS */ 3594 3595 /* RSNE */ 3596 wpa_hexdump(MSG_DEBUG, "FILS: RSNE in FILS Authentication frame", 3597 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); 3598 wpabuf_put_data(buf, sm->assoc_wpa_ie, sm->assoc_wpa_ie_len); 3599 3600 if (md) { 3601 /* MDE when using FILS for FT initial association */ 3602 struct rsn_mdie *mdie; 3603 3604 wpabuf_put_u8(buf, WLAN_EID_MOBILITY_DOMAIN); 3605 wpabuf_put_u8(buf, sizeof(*mdie)); 3606 mdie = wpabuf_put(buf, sizeof(*mdie)); 3607 os_memcpy(mdie->mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); 3608 mdie->ft_capab = 0; 3609 } 3610 3611 /* FILS Nonce */ 3612 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3613 wpabuf_put_u8(buf, 1 + FILS_NONCE_LEN); /* Length */ 3614 /* Element ID Extension */ 3615 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_NONCE); 3616 wpabuf_put_data(buf, sm->fils_nonce, FILS_NONCE_LEN); 3617 3618 /* FILS Session */ 3619 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3620 wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ 3621 /* Element ID Extension */ 3622 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); 3623 wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); 3624 3625 /* FILS Wrapped Data */ 3626 sm->fils_erp_pmkid_set = 0; 3627 if (erp_msg) { 3628 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 3629 wpabuf_put_u8(buf, 1 + wpabuf_len(erp_msg)); /* Length */ 3630 /* Element ID Extension */ 3631 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_WRAPPED_DATA); 3632 wpabuf_put_buf(buf, erp_msg); 3633 /* Calculate pending PMKID here so that we do not need to 3634 * maintain a copy of the EAP-Initiate/Reauth message. */ 3635 if (fils_pmkid_erp(sm->key_mgmt, wpabuf_head(erp_msg), 3636 wpabuf_len(erp_msg), 3637 sm->fils_erp_pmkid) == 0) 3638 sm->fils_erp_pmkid_set = 1; 3639 } 3640 3641 wpa_hexdump_buf(MSG_DEBUG, "RSN: FILS fields for Authentication frame", 3642 buf); 3643 3644 fail: 3645 wpabuf_free(erp_msg); 3646 wpabuf_free(pub); 3647 return buf; 3648 } 3649 3650 3651 int fils_process_auth(struct wpa_sm *sm, const u8 *bssid, const u8 *data, 3652 size_t len) 3653 { 3654 const u8 *pos, *end; 3655 struct ieee802_11_elems elems; 3656 struct wpa_ie_data rsn; 3657 int pmkid_match = 0; 3658 u8 ick[FILS_ICK_MAX_LEN]; 3659 size_t ick_len; 3660 int res; 3661 struct wpabuf *dh_ss = NULL; 3662 const u8 *g_sta = NULL; 3663 size_t g_sta_len = 0; 3664 const u8 *g_ap = NULL; 3665 size_t g_ap_len = 0; 3666 struct wpabuf *pub = NULL; 3667 3668 os_memcpy(sm->bssid, bssid, ETH_ALEN); 3669 3670 wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields", 3671 data, len); 3672 pos = data; 3673 end = data + len; 3674 3675 /* TODO: FILS PK */ 3676 #ifdef CONFIG_FILS_SK_PFS 3677 if (sm->fils_dh_group) { 3678 u16 group; 3679 3680 /* Using FILS PFS */ 3681 3682 /* Finite Cyclic Group */ 3683 if (end - pos < 2) { 3684 wpa_printf(MSG_DEBUG, 3685 "FILS: No room for Finite Cyclic Group"); 3686 goto fail; 3687 } 3688 group = WPA_GET_LE16(pos); 3689 pos += 2; 3690 if (group != sm->fils_dh_group) { 3691 wpa_printf(MSG_DEBUG, 3692 "FILS: Unexpected change in Finite Cyclic Group: %u (expected %u)", 3693 group, sm->fils_dh_group); 3694 goto fail; 3695 } 3696 3697 /* Element */ 3698 if ((size_t) (end - pos) < sm->fils_dh_elem_len) { 3699 wpa_printf(MSG_DEBUG, "FILS: No room for Element"); 3700 goto fail; 3701 } 3702 3703 if (!sm->fils_ecdh) { 3704 wpa_printf(MSG_DEBUG, "FILS: No ECDH state available"); 3705 goto fail; 3706 } 3707 dh_ss = crypto_ecdh_set_peerkey(sm->fils_ecdh, 1, pos, 3708 sm->fils_dh_elem_len); 3709 if (!dh_ss) { 3710 wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed"); 3711 goto fail; 3712 } 3713 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", dh_ss); 3714 g_ap = pos; 3715 g_ap_len = sm->fils_dh_elem_len; 3716 pos += sm->fils_dh_elem_len; 3717 } 3718 #endif /* CONFIG_FILS_SK_PFS */ 3719 3720 wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos); 3721 if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) { 3722 wpa_printf(MSG_DEBUG, "FILS: Could not parse elements"); 3723 goto fail; 3724 } 3725 3726 /* RSNE */ 3727 wpa_hexdump(MSG_DEBUG, "FILS: RSN element", elems.rsn_ie, 3728 elems.rsn_ie_len); 3729 if (!elems.rsn_ie || 3730 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, 3731 &rsn) < 0) { 3732 wpa_printf(MSG_DEBUG, "FILS: No RSN element"); 3733 goto fail; 3734 } 3735 3736 if (!elems.fils_nonce) { 3737 wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field"); 3738 goto fail; 3739 } 3740 os_memcpy(sm->fils_anonce, elems.fils_nonce, FILS_NONCE_LEN); 3741 wpa_hexdump(MSG_DEBUG, "FILS: ANonce", sm->fils_anonce, FILS_NONCE_LEN); 3742 3743 #ifdef CONFIG_IEEE80211R 3744 if (wpa_key_mgmt_ft(sm->key_mgmt)) { 3745 struct wpa_ft_ies parse; 3746 3747 if (!elems.mdie || !elems.ftie) { 3748 wpa_printf(MSG_DEBUG, "FILS+FT: No MDE or FTE"); 3749 goto fail; 3750 } 3751 3752 if (wpa_ft_parse_ies(pos, end - pos, &parse, 3753 wpa_key_mgmt_sha384(sm->key_mgmt)) < 0) { 3754 wpa_printf(MSG_DEBUG, "FILS+FT: Failed to parse IEs"); 3755 goto fail; 3756 } 3757 3758 if (!parse.r0kh_id) { 3759 wpa_printf(MSG_DEBUG, 3760 "FILS+FT: No R0KH-ID subelem in FTE"); 3761 goto fail; 3762 } 3763 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len); 3764 sm->r0kh_id_len = parse.r0kh_id_len; 3765 wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID", 3766 sm->r0kh_id, sm->r0kh_id_len); 3767 3768 if (!parse.r1kh_id) { 3769 wpa_printf(MSG_DEBUG, 3770 "FILS+FT: No R1KH-ID subelem in FTE"); 3771 goto fail; 3772 } 3773 os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN); 3774 wpa_hexdump(MSG_DEBUG, "FILS+FT: R1KH-ID", 3775 sm->r1kh_id, FT_R1KH_ID_LEN); 3776 3777 /* TODO: Check MDE and FTE payload */ 3778 3779 wpabuf_free(sm->fils_ft_ies); 3780 sm->fils_ft_ies = wpabuf_alloc(2 + elems.mdie_len + 3781 2 + elems.ftie_len); 3782 if (!sm->fils_ft_ies) 3783 goto fail; 3784 wpabuf_put_data(sm->fils_ft_ies, elems.mdie - 2, 3785 2 + elems.mdie_len); 3786 wpabuf_put_data(sm->fils_ft_ies, elems.ftie - 2, 3787 2 + elems.ftie_len); 3788 } else { 3789 wpabuf_free(sm->fils_ft_ies); 3790 sm->fils_ft_ies = NULL; 3791 } 3792 #endif /* CONFIG_IEEE80211R */ 3793 3794 /* PMKID List */ 3795 if (rsn.pmkid && rsn.num_pmkid > 0) { 3796 wpa_hexdump(MSG_DEBUG, "FILS: PMKID List", 3797 rsn.pmkid, rsn.num_pmkid * PMKID_LEN); 3798 3799 if (rsn.num_pmkid != 1) { 3800 wpa_printf(MSG_DEBUG, "FILS: Invalid PMKID selection"); 3801 goto fail; 3802 } 3803 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", rsn.pmkid, PMKID_LEN); 3804 if (os_memcmp(sm->cur_pmksa->pmkid, rsn.pmkid, PMKID_LEN) != 0) 3805 { 3806 wpa_printf(MSG_DEBUG, "FILS: PMKID mismatch"); 3807 wpa_hexdump(MSG_DEBUG, "FILS: Expected PMKID", 3808 sm->cur_pmksa->pmkid, PMKID_LEN); 3809 goto fail; 3810 } 3811 wpa_printf(MSG_DEBUG, 3812 "FILS: Matching PMKID - continue using PMKSA caching"); 3813 pmkid_match = 1; 3814 } 3815 if (!pmkid_match && sm->cur_pmksa) { 3816 wpa_printf(MSG_DEBUG, 3817 "FILS: No PMKID match - cannot use cached PMKSA entry"); 3818 sm->cur_pmksa = NULL; 3819 } 3820 3821 /* FILS Session */ 3822 if (!elems.fils_session) { 3823 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); 3824 goto fail; 3825 } 3826 wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session, 3827 FILS_SESSION_LEN); 3828 if (os_memcmp(sm->fils_session, elems.fils_session, FILS_SESSION_LEN) 3829 != 0) { 3830 wpa_printf(MSG_DEBUG, "FILS: Session mismatch"); 3831 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", 3832 sm->fils_session, FILS_SESSION_LEN); 3833 goto fail; 3834 } 3835 3836 /* FILS Wrapped Data */ 3837 if (!sm->cur_pmksa && elems.fils_wrapped_data) { 3838 u8 rmsk[ERP_MAX_KEY_LEN]; 3839 size_t rmsk_len; 3840 3841 wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data", 3842 elems.fils_wrapped_data, 3843 elems.fils_wrapped_data_len); 3844 eapol_sm_process_erp_finish(sm->eapol, elems.fils_wrapped_data, 3845 elems.fils_wrapped_data_len); 3846 if (eapol_sm_failed(sm->eapol)) 3847 goto fail; 3848 3849 rmsk_len = ERP_MAX_KEY_LEN; 3850 res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); 3851 if (res == PMK_LEN) { 3852 rmsk_len = PMK_LEN; 3853 res = eapol_sm_get_key(sm->eapol, rmsk, rmsk_len); 3854 } 3855 if (res) 3856 goto fail; 3857 3858 res = fils_rmsk_to_pmk(sm->key_mgmt, rmsk, rmsk_len, 3859 sm->fils_nonce, sm->fils_anonce, 3860 dh_ss ? wpabuf_head(dh_ss) : NULL, 3861 dh_ss ? wpabuf_len(dh_ss) : 0, 3862 sm->pmk, &sm->pmk_len); 3863 os_memset(rmsk, 0, sizeof(rmsk)); 3864 3865 /* Don't use DHss in PTK derivation if PMKSA caching is not 3866 * used. */ 3867 wpabuf_clear_free(dh_ss); 3868 dh_ss = NULL; 3869 3870 if (res) 3871 goto fail; 3872 3873 if (!sm->fils_erp_pmkid_set) { 3874 wpa_printf(MSG_DEBUG, "FILS: PMKID not available"); 3875 goto fail; 3876 } 3877 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", sm->fils_erp_pmkid, 3878 PMKID_LEN); 3879 wpa_printf(MSG_DEBUG, "FILS: ERP processing succeeded - add PMKSA cache entry for the result"); 3880 sm->cur_pmksa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, 3881 sm->fils_erp_pmkid, NULL, 0, 3882 sm->bssid, sm->own_addr, 3883 sm->network_ctx, sm->key_mgmt, 3884 NULL); 3885 } 3886 3887 if (!sm->cur_pmksa) { 3888 wpa_printf(MSG_DEBUG, 3889 "FILS: No remaining options to continue FILS authentication"); 3890 goto fail; 3891 } 3892 3893 if (fils_pmk_to_ptk(sm->pmk, sm->pmk_len, sm->own_addr, sm->bssid, 3894 sm->fils_nonce, sm->fils_anonce, 3895 dh_ss ? wpabuf_head(dh_ss) : NULL, 3896 dh_ss ? wpabuf_len(dh_ss) : 0, 3897 &sm->ptk, ick, &ick_len, 3898 sm->key_mgmt, sm->pairwise_cipher, 3899 sm->fils_ft, &sm->fils_ft_len) < 0) { 3900 wpa_printf(MSG_DEBUG, "FILS: Failed to derive PTK"); 3901 goto fail; 3902 } 3903 3904 wpabuf_clear_free(dh_ss); 3905 dh_ss = NULL; 3906 3907 sm->ptk_set = 1; 3908 sm->tptk_set = 0; 3909 os_memset(&sm->tptk, 0, sizeof(sm->tptk)); 3910 3911 #ifdef CONFIG_FILS_SK_PFS 3912 if (sm->fils_dh_group) { 3913 if (!sm->fils_ecdh) { 3914 wpa_printf(MSG_INFO, "FILS: ECDH not initialized"); 3915 goto fail; 3916 } 3917 pub = crypto_ecdh_get_pubkey(sm->fils_ecdh, 1); 3918 if (!pub) 3919 goto fail; 3920 wpa_hexdump_buf(MSG_DEBUG, "FILS: gSTA", pub); 3921 g_sta = wpabuf_head(pub); 3922 g_sta_len = wpabuf_len(pub); 3923 if (!g_ap) { 3924 wpa_printf(MSG_INFO, "FILS: gAP not available"); 3925 goto fail; 3926 } 3927 wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len); 3928 } 3929 #endif /* CONFIG_FILS_SK_PFS */ 3930 3931 res = fils_key_auth_sk(ick, ick_len, sm->fils_nonce, 3932 sm->fils_anonce, sm->own_addr, sm->bssid, 3933 g_sta, g_sta_len, g_ap, g_ap_len, 3934 sm->key_mgmt, sm->fils_key_auth_sta, 3935 sm->fils_key_auth_ap, 3936 &sm->fils_key_auth_len); 3937 wpabuf_free(pub); 3938 os_memset(ick, 0, sizeof(ick)); 3939 return res; 3940 fail: 3941 wpabuf_free(pub); 3942 wpabuf_clear_free(dh_ss); 3943 return -1; 3944 } 3945 3946 3947 #ifdef CONFIG_IEEE80211R 3948 static int fils_ft_build_assoc_req_rsne(struct wpa_sm *sm, struct wpabuf *buf) 3949 { 3950 struct rsn_ie_hdr *rsnie; 3951 u16 capab; 3952 u8 *pos; 3953 int use_sha384 = wpa_key_mgmt_sha384(sm->key_mgmt); 3954 3955 /* RSNIE[PMKR0Name/PMKR1Name] */ 3956 rsnie = wpabuf_put(buf, sizeof(*rsnie)); 3957 rsnie->elem_id = WLAN_EID_RSN; 3958 WPA_PUT_LE16(rsnie->version, RSN_VERSION); 3959 3960 /* Group Suite Selector */ 3961 if (!wpa_cipher_valid_group(sm->group_cipher)) { 3962 wpa_printf(MSG_WARNING, "FT: Invalid group cipher (%d)", 3963 sm->group_cipher); 3964 return -1; 3965 } 3966 pos = wpabuf_put(buf, RSN_SELECTOR_LEN); 3967 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, 3968 sm->group_cipher)); 3969 3970 /* Pairwise Suite Count */ 3971 wpabuf_put_le16(buf, 1); 3972 3973 /* Pairwise Suite List */ 3974 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) { 3975 wpa_printf(MSG_WARNING, "FT: Invalid pairwise cipher (%d)", 3976 sm->pairwise_cipher); 3977 return -1; 3978 } 3979 pos = wpabuf_put(buf, RSN_SELECTOR_LEN); 3980 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, 3981 sm->pairwise_cipher)); 3982 3983 /* Authenticated Key Management Suite Count */ 3984 wpabuf_put_le16(buf, 1); 3985 3986 /* Authenticated Key Management Suite List */ 3987 pos = wpabuf_put(buf, RSN_SELECTOR_LEN); 3988 if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA256) 3989 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256); 3990 else if (sm->key_mgmt == WPA_KEY_MGMT_FT_FILS_SHA384) 3991 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384); 3992 else { 3993 wpa_printf(MSG_WARNING, 3994 "FILS+FT: Invalid key management type (%d)", 3995 sm->key_mgmt); 3996 return -1; 3997 } 3998 3999 /* RSN Capabilities */ 4000 capab = 0; 4001 #ifdef CONFIG_IEEE80211W 4002 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) 4003 capab |= WPA_CAPABILITY_MFPC; 4004 #endif /* CONFIG_IEEE80211W */ 4005 if (sm->ocv) 4006 capab |= WPA_CAPABILITY_OCVC; 4007 wpabuf_put_le16(buf, capab); 4008 4009 /* PMKID Count */ 4010 wpabuf_put_le16(buf, 1); 4011 4012 /* PMKID List [PMKR1Name] */ 4013 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: XXKey (FILS-FT)", 4014 sm->fils_ft, sm->fils_ft_len); 4015 wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: SSID", sm->ssid, sm->ssid_len); 4016 wpa_hexdump(MSG_DEBUG, "FILS+FT: MDID", 4017 sm->mobility_domain, MOBILITY_DOMAIN_ID_LEN); 4018 wpa_hexdump_ascii(MSG_DEBUG, "FILS+FT: R0KH-ID", 4019 sm->r0kh_id, sm->r0kh_id_len); 4020 if (wpa_derive_pmk_r0(sm->fils_ft, sm->fils_ft_len, sm->ssid, 4021 sm->ssid_len, sm->mobility_domain, 4022 sm->r0kh_id, sm->r0kh_id_len, sm->own_addr, 4023 sm->pmk_r0, sm->pmk_r0_name, use_sha384) < 0) { 4024 wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMK-R0"); 4025 return -1; 4026 } 4027 sm->pmk_r0_len = use_sha384 ? SHA384_MAC_LEN : PMK_LEN; 4028 wpa_hexdump_key(MSG_DEBUG, "FILS+FT: PMK-R0", 4029 sm->pmk_r0, sm->pmk_r0_len); 4030 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR0Name", 4031 sm->pmk_r0_name, WPA_PMK_NAME_LEN); 4032 wpa_printf(MSG_DEBUG, "FILS+FT: R1KH-ID: " MACSTR, 4033 MAC2STR(sm->r1kh_id)); 4034 pos = wpabuf_put(buf, WPA_PMK_NAME_LEN); 4035 if (wpa_derive_pmk_r1_name(sm->pmk_r0_name, sm->r1kh_id, sm->own_addr, 4036 sm->pmk_r1_name, use_sha384) < 0) { 4037 wpa_printf(MSG_WARNING, "FILS+FT: Could not derive PMKR1Name"); 4038 return -1; 4039 } 4040 wpa_hexdump(MSG_DEBUG, "FILS+FT: PMKR1Name", sm->pmk_r1_name, 4041 WPA_PMK_NAME_LEN); 4042 os_memcpy(pos, sm->pmk_r1_name, WPA_PMK_NAME_LEN); 4043 4044 #ifdef CONFIG_IEEE80211W 4045 if (sm->mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) { 4046 /* Management Group Cipher Suite */ 4047 pos = wpabuf_put(buf, RSN_SELECTOR_LEN); 4048 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC); 4049 } 4050 #endif /* CONFIG_IEEE80211W */ 4051 4052 rsnie->len = ((u8 *) wpabuf_put(buf, 0) - (u8 *) rsnie) - 2; 4053 return 0; 4054 } 4055 #endif /* CONFIG_IEEE80211R */ 4056 4057 4058 struct wpabuf * fils_build_assoc_req(struct wpa_sm *sm, const u8 **kek, 4059 size_t *kek_len, const u8 **snonce, 4060 const u8 **anonce, 4061 const struct wpabuf **hlp, 4062 unsigned int num_hlp) 4063 { 4064 struct wpabuf *buf; 4065 size_t len; 4066 unsigned int i; 4067 4068 len = 1000; 4069 #ifdef CONFIG_IEEE80211R 4070 if (sm->fils_ft_ies) 4071 len += wpabuf_len(sm->fils_ft_ies); 4072 if (wpa_key_mgmt_ft(sm->key_mgmt)) 4073 len += 256; 4074 #endif /* CONFIG_IEEE80211R */ 4075 for (i = 0; hlp && i < num_hlp; i++) 4076 len += 10 + wpabuf_len(hlp[i]); 4077 buf = wpabuf_alloc(len); 4078 if (!buf) 4079 return NULL; 4080 4081 #ifdef CONFIG_IEEE80211R 4082 if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) { 4083 /* MDE and FTE when using FILS+FT */ 4084 wpabuf_put_buf(buf, sm->fils_ft_ies); 4085 /* RSNE with PMKR1Name in PMKID field */ 4086 if (fils_ft_build_assoc_req_rsne(sm, buf) < 0) { 4087 wpabuf_free(buf); 4088 return NULL; 4089 } 4090 } 4091 #endif /* CONFIG_IEEE80211R */ 4092 4093 /* FILS Session */ 4094 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 4095 wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); /* Length */ 4096 /* Element ID Extension */ 4097 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); 4098 wpabuf_put_data(buf, sm->fils_session, FILS_SESSION_LEN); 4099 4100 /* Everything after FILS Session element gets encrypted in the driver 4101 * with KEK. The buffer returned from here is the plaintext version. */ 4102 4103 /* TODO: FILS Public Key */ 4104 4105 /* FILS Key Confirm */ 4106 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 4107 wpabuf_put_u8(buf, 1 + sm->fils_key_auth_len); /* Length */ 4108 /* Element ID Extension */ 4109 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_KEY_CONFIRM); 4110 wpabuf_put_data(buf, sm->fils_key_auth_sta, sm->fils_key_auth_len); 4111 4112 /* FILS HLP Container */ 4113 for (i = 0; hlp && i < num_hlp; i++) { 4114 const u8 *pos = wpabuf_head(hlp[i]); 4115 size_t left = wpabuf_len(hlp[i]); 4116 4117 wpabuf_put_u8(buf, WLAN_EID_EXTENSION); /* Element ID */ 4118 if (left <= 254) 4119 len = 1 + left; 4120 else 4121 len = 255; 4122 wpabuf_put_u8(buf, len); /* Length */ 4123 /* Element ID Extension */ 4124 wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_HLP_CONTAINER); 4125 /* Destination MAC Address, Source MAC Address, HLP Packet. 4126 * HLP Packet is in MSDU format (i.e., included the LLC/SNAP 4127 * header when LPD is used). */ 4128 wpabuf_put_data(buf, pos, len - 1); 4129 pos += len - 1; 4130 left -= len - 1; 4131 while (left) { 4132 wpabuf_put_u8(buf, WLAN_EID_FRAGMENT); 4133 len = left > 255 ? 255 : left; 4134 wpabuf_put_u8(buf, len); 4135 wpabuf_put_data(buf, pos, len); 4136 pos += len; 4137 left -= len; 4138 } 4139 } 4140 4141 /* TODO: FILS IP Address Assignment */ 4142 4143 #ifdef CONFIG_OCV 4144 if (wpa_sm_ocv_enabled(sm)) { 4145 struct wpa_channel_info ci; 4146 u8 *pos; 4147 4148 if (wpa_sm_channel_info(sm, &ci) != 0) { 4149 wpa_printf(MSG_WARNING, 4150 "FILS: Failed to get channel info for OCI element"); 4151 wpabuf_free(buf); 4152 return NULL; 4153 } 4154 4155 pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN); 4156 if (ocv_insert_extended_oci(&ci, pos) < 0) { 4157 wpabuf_free(buf); 4158 return NULL; 4159 } 4160 } 4161 #endif /* CONFIG_OCV */ 4162 4163 wpa_hexdump_buf(MSG_DEBUG, "FILS: Association Request plaintext", buf); 4164 4165 *kek = sm->ptk.kek; 4166 *kek_len = sm->ptk.kek_len; 4167 wpa_hexdump_key(MSG_DEBUG, "FILS: KEK for AEAD", *kek, *kek_len); 4168 *snonce = sm->fils_nonce; 4169 wpa_hexdump(MSG_DEBUG, "FILS: SNonce for AEAD AAD", 4170 *snonce, FILS_NONCE_LEN); 4171 *anonce = sm->fils_anonce; 4172 wpa_hexdump(MSG_DEBUG, "FILS: ANonce for AEAD AAD", 4173 *anonce, FILS_NONCE_LEN); 4174 4175 return buf; 4176 } 4177 4178 4179 static void fils_process_hlp_resp(struct wpa_sm *sm, const u8 *resp, size_t len) 4180 { 4181 const u8 *pos, *end; 4182 4183 wpa_hexdump(MSG_MSGDUMP, "FILS: HLP response", resp, len); 4184 if (len < 2 * ETH_ALEN) 4185 return; 4186 pos = resp + 2 * ETH_ALEN; 4187 end = resp + len; 4188 if (end - pos >= 6 && 4189 os_memcmp(pos, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) 4190 pos += 6; /* Remove SNAP/LLC header */ 4191 wpa_sm_fils_hlp_rx(sm, resp, resp + ETH_ALEN, pos, end - pos); 4192 } 4193 4194 4195 static void fils_process_hlp_container(struct wpa_sm *sm, const u8 *pos, 4196 size_t len) 4197 { 4198 const u8 *end = pos + len; 4199 u8 *tmp, *tmp_pos; 4200 4201 /* Check if there are any FILS HLP Container elements */ 4202 while (end - pos >= 2) { 4203 if (2 + pos[1] > end - pos) 4204 return; 4205 if (pos[0] == WLAN_EID_EXTENSION && 4206 pos[1] >= 1 + 2 * ETH_ALEN && 4207 pos[2] == WLAN_EID_EXT_FILS_HLP_CONTAINER) 4208 break; 4209 pos += 2 + pos[1]; 4210 } 4211 if (end - pos < 2) 4212 return; /* No FILS HLP Container elements */ 4213 4214 tmp = os_malloc(end - pos); 4215 if (!tmp) 4216 return; 4217 4218 while (end - pos >= 2) { 4219 if (2 + pos[1] > end - pos || 4220 pos[0] != WLAN_EID_EXTENSION || 4221 pos[1] < 1 + 2 * ETH_ALEN || 4222 pos[2] != WLAN_EID_EXT_FILS_HLP_CONTAINER) 4223 break; 4224 tmp_pos = tmp; 4225 os_memcpy(tmp_pos, pos + 3, pos[1] - 1); 4226 tmp_pos += pos[1] - 1; 4227 pos += 2 + pos[1]; 4228 4229 /* Add possible fragments */ 4230 while (end - pos >= 2 && pos[0] == WLAN_EID_FRAGMENT && 4231 2 + pos[1] <= end - pos) { 4232 os_memcpy(tmp_pos, pos + 2, pos[1]); 4233 tmp_pos += pos[1]; 4234 pos += 2 + pos[1]; 4235 } 4236 4237 fils_process_hlp_resp(sm, tmp, tmp_pos - tmp); 4238 } 4239 4240 os_free(tmp); 4241 } 4242 4243 4244 int fils_process_assoc_resp(struct wpa_sm *sm, const u8 *resp, size_t len) 4245 { 4246 const struct ieee80211_mgmt *mgmt; 4247 const u8 *end, *ie_start; 4248 struct ieee802_11_elems elems; 4249 int keylen, rsclen; 4250 enum wpa_alg alg; 4251 struct wpa_gtk_data gd; 4252 int maxkeylen; 4253 struct wpa_eapol_ie_parse kde; 4254 4255 if (!sm || !sm->ptk_set) { 4256 wpa_printf(MSG_DEBUG, "FILS: No KEK available"); 4257 return -1; 4258 } 4259 4260 if (!wpa_key_mgmt_fils(sm->key_mgmt)) { 4261 wpa_printf(MSG_DEBUG, "FILS: Not a FILS AKM"); 4262 return -1; 4263 } 4264 4265 if (sm->fils_completed) { 4266 wpa_printf(MSG_DEBUG, 4267 "FILS: Association has already been completed for this FILS authentication - ignore unexpected retransmission"); 4268 return -1; 4269 } 4270 4271 wpa_hexdump(MSG_DEBUG, "FILS: (Re)Association Response frame", 4272 resp, len); 4273 4274 mgmt = (const struct ieee80211_mgmt *) resp; 4275 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_resp)) 4276 return -1; 4277 4278 end = resp + len; 4279 /* Same offset for Association Response and Reassociation Response */ 4280 ie_start = mgmt->u.assoc_resp.variable; 4281 4282 if (ieee802_11_parse_elems(ie_start, end - ie_start, &elems, 1) == 4283 ParseFailed) { 4284 wpa_printf(MSG_DEBUG, 4285 "FILS: Failed to parse decrypted elements"); 4286 goto fail; 4287 } 4288 4289 if (!elems.fils_session) { 4290 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); 4291 return -1; 4292 } 4293 if (os_memcmp(elems.fils_session, sm->fils_session, 4294 FILS_SESSION_LEN) != 0) { 4295 wpa_printf(MSG_DEBUG, "FILS: FILS Session mismatch"); 4296 wpa_hexdump(MSG_DEBUG, "FILS: Received FILS Session", 4297 elems.fils_session, FILS_SESSION_LEN); 4298 wpa_hexdump(MSG_DEBUG, "FILS: Expected FILS Session", 4299 sm->fils_session, FILS_SESSION_LEN); 4300 } 4301 4302 /* TODO: FILS Public Key */ 4303 4304 if (!elems.fils_key_confirm) { 4305 wpa_printf(MSG_DEBUG, "FILS: No FILS Key Confirm element"); 4306 goto fail; 4307 } 4308 if (elems.fils_key_confirm_len != sm->fils_key_auth_len) { 4309 wpa_printf(MSG_DEBUG, 4310 "FILS: Unexpected Key-Auth length %d (expected %d)", 4311 elems.fils_key_confirm_len, 4312 (int) sm->fils_key_auth_len); 4313 goto fail; 4314 } 4315 if (os_memcmp(elems.fils_key_confirm, sm->fils_key_auth_ap, 4316 sm->fils_key_auth_len) != 0) { 4317 wpa_printf(MSG_DEBUG, "FILS: Key-Auth mismatch"); 4318 wpa_hexdump(MSG_DEBUG, "FILS: Received Key-Auth", 4319 elems.fils_key_confirm, 4320 elems.fils_key_confirm_len); 4321 wpa_hexdump(MSG_DEBUG, "FILS: Expected Key-Auth", 4322 sm->fils_key_auth_ap, sm->fils_key_auth_len); 4323 goto fail; 4324 } 4325 4326 #ifdef CONFIG_OCV 4327 if (wpa_sm_ocv_enabled(sm)) { 4328 struct wpa_channel_info ci; 4329 4330 if (wpa_sm_channel_info(sm, &ci) != 0) { 4331 wpa_printf(MSG_WARNING, 4332 "Failed to get channel info to validate received OCI in FILS (Re)Association Response frame"); 4333 goto fail; 4334 } 4335 4336 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, 4337 channel_width_to_int(ci.chanwidth), 4338 ci.seg1_idx) != 0) { 4339 wpa_printf(MSG_WARNING, "FILS: %s", ocv_errorstr); 4340 goto fail; 4341 } 4342 } 4343 #endif /* CONFIG_OCV */ 4344 4345 #ifdef CONFIG_IEEE80211R 4346 if (wpa_key_mgmt_ft(sm->key_mgmt) && sm->fils_ft_ies) { 4347 struct wpa_ie_data rsn; 4348 4349 /* Check that PMKR1Name derived by the AP matches */ 4350 if (!elems.rsn_ie || 4351 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, 4352 &rsn) < 0 || 4353 !rsn.pmkid || rsn.num_pmkid != 1 || 4354 os_memcmp(rsn.pmkid, sm->pmk_r1_name, 4355 WPA_PMK_NAME_LEN) != 0) { 4356 wpa_printf(MSG_DEBUG, 4357 "FILS+FT: No RSNE[PMKR1Name] match in AssocResp"); 4358 goto fail; 4359 } 4360 } 4361 #endif /* CONFIG_IEEE80211R */ 4362 4363 /* Key Delivery */ 4364 if (!elems.key_delivery) { 4365 wpa_printf(MSG_DEBUG, "FILS: No Key Delivery element"); 4366 goto fail; 4367 } 4368 4369 /* Parse GTK and set the key to the driver */ 4370 os_memset(&gd, 0, sizeof(gd)); 4371 if (wpa_supplicant_parse_ies(elems.key_delivery + WPA_KEY_RSC_LEN, 4372 elems.key_delivery_len - WPA_KEY_RSC_LEN, 4373 &kde) < 0) { 4374 wpa_printf(MSG_DEBUG, "FILS: Failed to parse KDEs"); 4375 goto fail; 4376 } 4377 if (!kde.gtk) { 4378 wpa_printf(MSG_DEBUG, "FILS: No GTK KDE"); 4379 goto fail; 4380 } 4381 maxkeylen = gd.gtk_len = kde.gtk_len - 2; 4382 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher, 4383 gd.gtk_len, maxkeylen, 4384 &gd.key_rsc_len, &gd.alg)) 4385 goto fail; 4386 4387 wpa_hexdump_key(MSG_DEBUG, "FILS: Received GTK", kde.gtk, kde.gtk_len); 4388 gd.keyidx = kde.gtk[0] & 0x3; 4389 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, 4390 !!(kde.gtk[0] & BIT(2))); 4391 if (kde.gtk_len - 2 > sizeof(gd.gtk)) { 4392 wpa_printf(MSG_DEBUG, "FILS: Too long GTK in GTK KDE (len=%lu)", 4393 (unsigned long) kde.gtk_len - 2); 4394 goto fail; 4395 } 4396 os_memcpy(gd.gtk, kde.gtk + 2, kde.gtk_len - 2); 4397 4398 wpa_printf(MSG_DEBUG, "FILS: Set GTK to driver"); 4399 if (wpa_supplicant_install_gtk(sm, &gd, elems.key_delivery, 0) < 0) { 4400 wpa_printf(MSG_DEBUG, "FILS: Failed to set GTK"); 4401 goto fail; 4402 } 4403 4404 if (ieee80211w_set_keys(sm, &kde) < 0) { 4405 wpa_printf(MSG_DEBUG, "FILS: Failed to set IGTK"); 4406 goto fail; 4407 } 4408 4409 alg = wpa_cipher_to_alg(sm->pairwise_cipher); 4410 keylen = wpa_cipher_key_len(sm->pairwise_cipher); 4411 if (keylen <= 0 || (unsigned int) keylen != sm->ptk.tk_len) { 4412 wpa_printf(MSG_DEBUG, "FILS: TK length mismatch: %u != %lu", 4413 keylen, (long unsigned int) sm->ptk.tk_len); 4414 goto fail; 4415 } 4416 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher); 4417 wpa_hexdump_key(MSG_DEBUG, "FILS: Set TK to driver", 4418 sm->ptk.tk, keylen); 4419 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, null_rsc, rsclen, 4420 sm->ptk.tk, keylen) < 0) { 4421 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, 4422 "FILS: Failed to set PTK to the driver (alg=%d keylen=%d bssid=" 4423 MACSTR ")", 4424 alg, keylen, MAC2STR(sm->bssid)); 4425 goto fail; 4426 } 4427 4428 /* TODO: TK could be cleared after auth frame exchange now that driver 4429 * takes care of association frame encryption/decryption. */ 4430 /* TK is not needed anymore in supplicant */ 4431 os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN); 4432 sm->ptk.tk_len = 0; 4433 sm->ptk.installed = 1; 4434 4435 /* FILS HLP Container */ 4436 fils_process_hlp_container(sm, ie_start, end - ie_start); 4437 4438 /* TODO: FILS IP Address Assignment */ 4439 4440 wpa_printf(MSG_DEBUG, "FILS: Auth+Assoc completed successfully"); 4441 sm->fils_completed = 1; 4442 4443 return 0; 4444 fail: 4445 return -1; 4446 } 4447 4448 4449 void wpa_sm_set_reset_fils_completed(struct wpa_sm *sm, int set) 4450 { 4451 if (sm) 4452 sm->fils_completed = !!set; 4453 } 4454 4455 #endif /* CONFIG_FILS */ 4456 4457 4458 int wpa_fils_is_completed(struct wpa_sm *sm) 4459 { 4460 #ifdef CONFIG_FILS 4461 return sm && sm->fils_completed; 4462 #else /* CONFIG_FILS */ 4463 return 0; 4464 #endif /* CONFIG_FILS */ 4465 } 4466 4467 4468 #ifdef CONFIG_OWE 4469 4470 struct wpabuf * owe_build_assoc_req(struct wpa_sm *sm, u16 group) 4471 { 4472 struct wpabuf *ie = NULL, *pub = NULL; 4473 size_t prime_len; 4474 4475 if (group == 19) 4476 prime_len = 32; 4477 else if (group == 20) 4478 prime_len = 48; 4479 else if (group == 21) 4480 prime_len = 66; 4481 else 4482 return NULL; 4483 4484 crypto_ecdh_deinit(sm->owe_ecdh); 4485 sm->owe_ecdh = crypto_ecdh_init(group); 4486 if (!sm->owe_ecdh) 4487 goto fail; 4488 sm->owe_group = group; 4489 pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0); 4490 pub = wpabuf_zeropad(pub, prime_len); 4491 if (!pub) 4492 goto fail; 4493 4494 ie = wpabuf_alloc(5 + wpabuf_len(pub)); 4495 if (!ie) 4496 goto fail; 4497 wpabuf_put_u8(ie, WLAN_EID_EXTENSION); 4498 wpabuf_put_u8(ie, 1 + 2 + wpabuf_len(pub)); 4499 wpabuf_put_u8(ie, WLAN_EID_EXT_OWE_DH_PARAM); 4500 wpabuf_put_le16(ie, group); 4501 wpabuf_put_buf(ie, pub); 4502 wpabuf_free(pub); 4503 wpa_hexdump_buf(MSG_DEBUG, "OWE: Diffie-Hellman Parameter element", 4504 ie); 4505 4506 return ie; 4507 fail: 4508 wpabuf_free(pub); 4509 crypto_ecdh_deinit(sm->owe_ecdh); 4510 sm->owe_ecdh = NULL; 4511 return NULL; 4512 } 4513 4514 4515 int owe_process_assoc_resp(struct wpa_sm *sm, const u8 *bssid, 4516 const u8 *resp_ies, size_t resp_ies_len) 4517 { 4518 struct ieee802_11_elems elems; 4519 u16 group; 4520 struct wpabuf *secret, *pub, *hkey; 4521 int res; 4522 u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN]; 4523 const char *info = "OWE Key Generation"; 4524 const u8 *addr[2]; 4525 size_t len[2]; 4526 size_t hash_len, prime_len; 4527 struct wpa_ie_data data; 4528 4529 if (!resp_ies || 4530 ieee802_11_parse_elems(resp_ies, resp_ies_len, &elems, 1) == 4531 ParseFailed) { 4532 wpa_printf(MSG_INFO, 4533 "OWE: Could not parse Association Response frame elements"); 4534 return -1; 4535 } 4536 4537 if (sm->cur_pmksa && elems.rsn_ie && 4538 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 2 + elems.rsn_ie_len, 4539 &data) == 0 && 4540 data.num_pmkid == 1 && data.pmkid && 4541 os_memcmp(sm->cur_pmksa->pmkid, data.pmkid, PMKID_LEN) == 0) { 4542 wpa_printf(MSG_DEBUG, "OWE: Use PMKSA caching"); 4543 wpa_sm_set_pmk_from_pmksa(sm); 4544 return 0; 4545 } 4546 4547 if (!elems.owe_dh) { 4548 wpa_printf(MSG_INFO, 4549 "OWE: No Diffie-Hellman Parameter element found in Association Response frame"); 4550 return -1; 4551 } 4552 4553 group = WPA_GET_LE16(elems.owe_dh); 4554 if (group != sm->owe_group) { 4555 wpa_printf(MSG_INFO, 4556 "OWE: Unexpected Diffie-Hellman group in response: %u", 4557 group); 4558 return -1; 4559 } 4560 4561 if (!sm->owe_ecdh) { 4562 wpa_printf(MSG_INFO, "OWE: No ECDH state available"); 4563 return -1; 4564 } 4565 4566 if (group == 19) 4567 prime_len = 32; 4568 else if (group == 20) 4569 prime_len = 48; 4570 else if (group == 21) 4571 prime_len = 66; 4572 else 4573 return -1; 4574 4575 secret = crypto_ecdh_set_peerkey(sm->owe_ecdh, 0, 4576 elems.owe_dh + 2, 4577 elems.owe_dh_len - 2); 4578 secret = wpabuf_zeropad(secret, prime_len); 4579 if (!secret) { 4580 wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key"); 4581 return -1; 4582 } 4583 wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret); 4584 4585 /* prk = HKDF-extract(C | A | group, z) */ 4586 4587 pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0); 4588 if (!pub) { 4589 wpabuf_clear_free(secret); 4590 return -1; 4591 } 4592 4593 /* PMKID = Truncate-128(Hash(C | A)) */ 4594 addr[0] = wpabuf_head(pub); 4595 len[0] = wpabuf_len(pub); 4596 addr[1] = elems.owe_dh + 2; 4597 len[1] = elems.owe_dh_len - 2; 4598 if (group == 19) { 4599 res = sha256_vector(2, addr, len, pmkid); 4600 hash_len = SHA256_MAC_LEN; 4601 } else if (group == 20) { 4602 res = sha384_vector(2, addr, len, pmkid); 4603 hash_len = SHA384_MAC_LEN; 4604 } else if (group == 21) { 4605 res = sha512_vector(2, addr, len, pmkid); 4606 hash_len = SHA512_MAC_LEN; 4607 } else { 4608 res = -1; 4609 hash_len = 0; 4610 } 4611 pub = wpabuf_zeropad(pub, prime_len); 4612 if (res < 0 || !pub) { 4613 wpabuf_free(pub); 4614 wpabuf_clear_free(secret); 4615 return -1; 4616 } 4617 4618 hkey = wpabuf_alloc(wpabuf_len(pub) + elems.owe_dh_len - 2 + 2); 4619 if (!hkey) { 4620 wpabuf_free(pub); 4621 wpabuf_clear_free(secret); 4622 return -1; 4623 } 4624 4625 wpabuf_put_buf(hkey, pub); /* C */ 4626 wpabuf_free(pub); 4627 wpabuf_put_data(hkey, elems.owe_dh + 2, elems.owe_dh_len - 2); /* A */ 4628 wpabuf_put_le16(hkey, sm->owe_group); /* group */ 4629 if (group == 19) 4630 res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey), 4631 wpabuf_head(secret), wpabuf_len(secret), prk); 4632 else if (group == 20) 4633 res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey), 4634 wpabuf_head(secret), wpabuf_len(secret), prk); 4635 else if (group == 21) 4636 res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey), 4637 wpabuf_head(secret), wpabuf_len(secret), prk); 4638 wpabuf_clear_free(hkey); 4639 wpabuf_clear_free(secret); 4640 if (res < 0) 4641 return -1; 4642 4643 wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len); 4644 4645 /* PMK = HKDF-expand(prk, "OWE Key Generation", n) */ 4646 4647 if (group == 19) 4648 res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info, 4649 os_strlen(info), sm->pmk, hash_len); 4650 else if (group == 20) 4651 res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info, 4652 os_strlen(info), sm->pmk, hash_len); 4653 else if (group == 21) 4654 res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info, 4655 os_strlen(info), sm->pmk, hash_len); 4656 os_memset(prk, 0, SHA512_MAC_LEN); 4657 if (res < 0) { 4658 sm->pmk_len = 0; 4659 return -1; 4660 } 4661 sm->pmk_len = hash_len; 4662 4663 wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sm->pmk, sm->pmk_len); 4664 wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN); 4665 pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, pmkid, NULL, 0, 4666 bssid, sm->own_addr, sm->network_ctx, sm->key_mgmt, 4667 NULL); 4668 4669 return 0; 4670 } 4671 4672 #endif /* CONFIG_OWE */ 4673 4674 4675 void wpa_sm_set_fils_cache_id(struct wpa_sm *sm, const u8 *fils_cache_id) 4676 { 4677 #ifdef CONFIG_FILS 4678 if (sm && fils_cache_id) { 4679 sm->fils_cache_id_set = 1; 4680 os_memcpy(sm->fils_cache_id, fils_cache_id, FILS_CACHE_ID_LEN); 4681 } 4682 #endif /* CONFIG_FILS */ 4683 } 4684 4685 4686 #ifdef CONFIG_DPP2 4687 void wpa_sm_set_dpp_z(struct wpa_sm *sm, const struct wpabuf *z) 4688 { 4689 if (sm) { 4690 wpabuf_clear_free(sm->dpp_z); 4691 sm->dpp_z = z ? wpabuf_dup(z) : NULL; 4692 } 4693 } 4694 #endif /* CONFIG_DPP2 */ 4695