1 /* 2 * hostapd / IEEE 802.1X-2004 Authenticator 3 * Copyright (c) 2002-2019, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/eloop.h" 13 #include "crypto/md5.h" 14 #include "crypto/crypto.h" 15 #include "crypto/random.h" 16 #include "common/ieee802_11_defs.h" 17 #include "radius/radius.h" 18 #include "radius/radius_client.h" 19 #include "eap_server/eap.h" 20 #include "eap_common/eap_wsc_common.h" 21 #include "eapol_auth/eapol_auth_sm.h" 22 #include "eapol_auth/eapol_auth_sm_i.h" 23 #include "p2p/p2p.h" 24 #include "hostapd.h" 25 #include "accounting.h" 26 #include "sta_info.h" 27 #include "wpa_auth.h" 28 #include "preauth_auth.h" 29 #include "pmksa_cache_auth.h" 30 #include "ap_config.h" 31 #include "ap_drv_ops.h" 32 #include "wps_hostapd.h" 33 #include "hs20.h" 34 /* FIX: Not really a good thing to require ieee802_11.h here.. (FILS) */ 35 #include "ieee802_11.h" 36 #include "ieee802_1x.h" 37 38 39 #ifdef CONFIG_HS20 40 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx); 41 #endif /* CONFIG_HS20 */ 42 static void ieee802_1x_finished(struct hostapd_data *hapd, 43 struct sta_info *sta, int success, 44 int remediation); 45 46 47 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta, 48 u8 type, const u8 *data, size_t datalen) 49 { 50 u8 *buf; 51 struct ieee802_1x_hdr *xhdr; 52 size_t len; 53 int encrypt = 0; 54 55 len = sizeof(*xhdr) + datalen; 56 buf = os_zalloc(len); 57 if (buf == NULL) { 58 wpa_printf(MSG_ERROR, "malloc() failed for " 59 "ieee802_1x_send(len=%lu)", 60 (unsigned long) len); 61 return; 62 } 63 64 xhdr = (struct ieee802_1x_hdr *) buf; 65 xhdr->version = hapd->conf->eapol_version; 66 xhdr->type = type; 67 xhdr->length = host_to_be16(datalen); 68 69 if (datalen > 0 && data != NULL) 70 os_memcpy(xhdr + 1, data, datalen); 71 72 if (wpa_auth_pairwise_set(sta->wpa_sm)) 73 encrypt = 1; 74 #ifdef CONFIG_TESTING_OPTIONS 75 if (hapd->ext_eapol_frame_io) { 76 size_t hex_len = 2 * len + 1; 77 char *hex = os_malloc(hex_len); 78 79 if (hex) { 80 wpa_snprintf_hex(hex, hex_len, buf, len); 81 wpa_msg(hapd->msg_ctx, MSG_INFO, 82 "EAPOL-TX " MACSTR " %s", 83 MAC2STR(sta->addr), hex); 84 os_free(hex); 85 } 86 } else 87 #endif /* CONFIG_TESTING_OPTIONS */ 88 if (sta->flags & WLAN_STA_PREAUTH) { 89 rsn_preauth_send(hapd, sta, buf, len); 90 } else { 91 hostapd_drv_hapd_send_eapol( 92 hapd, sta->addr, buf, len, 93 encrypt, hostapd_sta_flags_to_drv(sta->flags)); 94 } 95 96 os_free(buf); 97 } 98 99 100 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd, 101 struct sta_info *sta, int authorized) 102 { 103 int res; 104 105 if (sta->flags & WLAN_STA_PREAUTH) 106 return; 107 108 if (authorized) { 109 ap_sta_set_authorized(hapd, sta, 1); 110 res = hostapd_set_authorized(hapd, sta, 1); 111 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 112 HOSTAPD_LEVEL_DEBUG, "authorizing port"); 113 } else { 114 ap_sta_set_authorized(hapd, sta, 0); 115 res = hostapd_set_authorized(hapd, sta, 0); 116 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 117 HOSTAPD_LEVEL_DEBUG, "unauthorizing port"); 118 } 119 120 if (res && errno != ENOENT) { 121 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR 122 " flags for kernel driver (errno=%d).", 123 MAC2STR(sta->addr), errno); 124 } 125 126 if (authorized) { 127 os_get_reltime(&sta->connected_time); 128 accounting_sta_start(hapd, sta); 129 } 130 } 131 132 133 #ifndef CONFIG_FIPS 134 #ifndef CONFIG_NO_RC4 135 136 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd, 137 struct sta_info *sta, 138 int idx, int broadcast, 139 u8 *key_data, size_t key_len) 140 { 141 u8 *buf, *ekey; 142 struct ieee802_1x_hdr *hdr; 143 struct ieee802_1x_eapol_key *key; 144 size_t len, ekey_len; 145 struct eapol_state_machine *sm = sta->eapol_sm; 146 147 if (sm == NULL) 148 return; 149 150 len = sizeof(*key) + key_len; 151 buf = os_zalloc(sizeof(*hdr) + len); 152 if (buf == NULL) 153 return; 154 155 hdr = (struct ieee802_1x_hdr *) buf; 156 key = (struct ieee802_1x_eapol_key *) (hdr + 1); 157 key->type = EAPOL_KEY_TYPE_RC4; 158 WPA_PUT_BE16(key->key_length, key_len); 159 wpa_get_ntp_timestamp(key->replay_counter); 160 161 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) { 162 wpa_printf(MSG_ERROR, "Could not get random numbers"); 163 os_free(buf); 164 return; 165 } 166 167 key->key_index = idx | (broadcast ? 0 : BIT(7)); 168 if (hapd->conf->eapol_key_index_workaround) { 169 /* According to some information, WinXP Supplicant seems to 170 * interpret bit7 as an indication whether the key is to be 171 * activated, so make it possible to enable workaround that 172 * sets this bit for all keys. */ 173 key->key_index |= BIT(7); 174 } 175 176 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and 177 * MSK[32..63] is used to sign the message. */ 178 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) { 179 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting " 180 "and signing EAPOL-Key"); 181 os_free(buf); 182 return; 183 } 184 os_memcpy((u8 *) (key + 1), key_data, key_len); 185 ekey_len = sizeof(key->key_iv) + 32; 186 ekey = os_malloc(ekey_len); 187 if (ekey == NULL) { 188 wpa_printf(MSG_ERROR, "Could not encrypt key"); 189 os_free(buf); 190 return; 191 } 192 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv)); 193 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32); 194 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len); 195 os_free(ekey); 196 197 /* This header is needed here for HMAC-MD5, but it will be regenerated 198 * in ieee802_1x_send() */ 199 hdr->version = hapd->conf->eapol_version; 200 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; 201 hdr->length = host_to_be16(len); 202 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len, 203 key->key_signature); 204 205 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR 206 " (%s index=%d)", MAC2STR(sm->addr), 207 broadcast ? "broadcast" : "unicast", idx); 208 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len); 209 if (sta->eapol_sm) 210 sta->eapol_sm->dot1xAuthEapolFramesTx++; 211 os_free(buf); 212 } 213 214 215 static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta) 216 { 217 struct eapol_authenticator *eapol = hapd->eapol_auth; 218 struct eapol_state_machine *sm = sta->eapol_sm; 219 220 if (sm == NULL || !sm->eap_if->eapKeyData) 221 return; 222 223 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR, 224 MAC2STR(sta->addr)); 225 226 #ifndef CONFIG_NO_VLAN 227 if (sta->vlan_id > 0) { 228 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported."); 229 return; 230 } 231 #endif /* CONFIG_NO_VLAN */ 232 233 if (eapol->default_wep_key) { 234 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1, 235 eapol->default_wep_key, 236 hapd->conf->default_wep_key_len); 237 } 238 239 if (hapd->conf->individual_wep_key_len > 0) { 240 u8 *ikey; 241 ikey = os_malloc(hapd->conf->individual_wep_key_len); 242 if (ikey == NULL || 243 random_get_bytes(ikey, hapd->conf->individual_wep_key_len)) 244 { 245 wpa_printf(MSG_ERROR, "Could not generate random " 246 "individual WEP key."); 247 os_free(ikey); 248 return; 249 } 250 251 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key", 252 ikey, hapd->conf->individual_wep_key_len); 253 254 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey, 255 hapd->conf->individual_wep_key_len); 256 257 /* TODO: set encryption in TX callback, i.e., only after STA 258 * has ACKed EAPOL-Key frame */ 259 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, 260 sta->addr, 0, 1, NULL, 0, ikey, 261 hapd->conf->individual_wep_key_len)) { 262 wpa_printf(MSG_ERROR, "Could not set individual WEP " 263 "encryption."); 264 } 265 266 os_free(ikey); 267 } 268 } 269 270 #endif /* CONFIG_NO_RC4 */ 271 #endif /* CONFIG_FIPS */ 272 273 274 const char *radius_mode_txt(struct hostapd_data *hapd) 275 { 276 switch (hapd->iface->conf->hw_mode) { 277 case HOSTAPD_MODE_IEEE80211AD: 278 return "802.11ad"; 279 case HOSTAPD_MODE_IEEE80211A: 280 return "802.11a"; 281 case HOSTAPD_MODE_IEEE80211G: 282 return "802.11g"; 283 case HOSTAPD_MODE_IEEE80211B: 284 default: 285 return "802.11b"; 286 } 287 } 288 289 290 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta) 291 { 292 int i; 293 u8 rate = 0; 294 295 for (i = 0; i < sta->supported_rates_len; i++) 296 if ((sta->supported_rates[i] & 0x7f) > rate) 297 rate = sta->supported_rates[i] & 0x7f; 298 299 return rate; 300 } 301 302 303 #ifndef CONFIG_NO_RADIUS 304 static void ieee802_1x_learn_identity(struct hostapd_data *hapd, 305 struct eapol_state_machine *sm, 306 const u8 *eap, size_t len) 307 { 308 const u8 *identity; 309 size_t identity_len; 310 const struct eap_hdr *hdr = (const struct eap_hdr *) eap; 311 312 if (len <= sizeof(struct eap_hdr) || 313 (hdr->code == EAP_CODE_RESPONSE && 314 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) || 315 (hdr->code == EAP_CODE_INITIATE && 316 eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) || 317 (hdr->code != EAP_CODE_RESPONSE && 318 hdr->code != EAP_CODE_INITIATE)) 319 return; 320 321 eap_erp_update_identity(sm->eap, eap, len); 322 identity = eap_get_identity(sm->eap, &identity_len); 323 if (identity == NULL) 324 return; 325 326 /* Save station identity for future RADIUS packets */ 327 os_free(sm->identity); 328 sm->identity = (u8 *) dup_binstr(identity, identity_len); 329 if (sm->identity == NULL) { 330 sm->identity_len = 0; 331 return; 332 } 333 334 sm->identity_len = identity_len; 335 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 336 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity); 337 sm->dot1xAuthEapolRespIdFramesRx++; 338 } 339 340 341 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd, 342 struct hostapd_radius_attr *req_attr, 343 struct sta_info *sta, 344 struct radius_msg *msg) 345 { 346 u32 suite; 347 int ver, val; 348 349 ver = wpa_auth_sta_wpa_version(sta->wpa_sm); 350 val = wpa_auth_get_pairwise(sta->wpa_sm); 351 suite = wpa_cipher_to_suite(ver, val); 352 if (val != -1 && 353 !hostapd_config_get_radius_attr(req_attr, 354 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) && 355 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER, 356 suite)) { 357 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher"); 358 return -1; 359 } 360 361 suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) || 362 hapd->conf->osen) ? 363 WPA_PROTO_RSN : WPA_PROTO_WPA, 364 hapd->conf->wpa_group); 365 if (!hostapd_config_get_radius_attr(req_attr, 366 RADIUS_ATTR_WLAN_GROUP_CIPHER) && 367 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER, 368 suite)) { 369 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher"); 370 return -1; 371 } 372 373 val = wpa_auth_sta_key_mgmt(sta->wpa_sm); 374 suite = wpa_akm_to_suite(val); 375 if (val != -1 && 376 !hostapd_config_get_radius_attr(req_attr, 377 RADIUS_ATTR_WLAN_AKM_SUITE) && 378 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE, 379 suite)) { 380 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite"); 381 return -1; 382 } 383 384 #ifdef CONFIG_IEEE80211W 385 if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { 386 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, 387 hapd->conf->group_mgmt_cipher); 388 if (!hostapd_config_get_radius_attr( 389 req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) && 390 !radius_msg_add_attr_int32( 391 msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) { 392 wpa_printf(MSG_ERROR, 393 "Could not add WLAN-Group-Mgmt-Cipher"); 394 return -1; 395 } 396 } 397 #endif /* CONFIG_IEEE80211W */ 398 399 return 0; 400 } 401 402 403 static int add_common_radius_sta_attr(struct hostapd_data *hapd, 404 struct hostapd_radius_attr *req_attr, 405 struct sta_info *sta, 406 struct radius_msg *msg) 407 { 408 char buf[128]; 409 410 if (!hostapd_config_get_radius_attr(req_attr, 411 RADIUS_ATTR_SERVICE_TYPE) && 412 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_SERVICE_TYPE, 413 RADIUS_SERVICE_TYPE_FRAMED)) { 414 wpa_printf(MSG_ERROR, "Could not add Service-Type"); 415 return -1; 416 } 417 418 if (!hostapd_config_get_radius_attr(req_attr, 419 RADIUS_ATTR_NAS_PORT) && 420 sta->aid > 0 && 421 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) { 422 wpa_printf(MSG_ERROR, "Could not add NAS-Port"); 423 return -1; 424 } 425 426 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT, 427 MAC2STR(sta->addr)); 428 buf[sizeof(buf) - 1] = '\0'; 429 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID, 430 (u8 *) buf, os_strlen(buf))) { 431 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id"); 432 return -1; 433 } 434 435 if (sta->flags & WLAN_STA_PREAUTH) { 436 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication", 437 sizeof(buf)); 438 } else { 439 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s", 440 radius_sta_rate(hapd, sta) / 2, 441 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "", 442 radius_mode_txt(hapd)); 443 buf[sizeof(buf) - 1] = '\0'; 444 } 445 if (!hostapd_config_get_radius_attr(req_attr, 446 RADIUS_ATTR_CONNECT_INFO) && 447 !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO, 448 (u8 *) buf, os_strlen(buf))) { 449 wpa_printf(MSG_ERROR, "Could not add Connect-Info"); 450 return -1; 451 } 452 453 if (sta->acct_session_id) { 454 os_snprintf(buf, sizeof(buf), "%016llX", 455 (unsigned long long) sta->acct_session_id); 456 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID, 457 (u8 *) buf, os_strlen(buf))) { 458 wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id"); 459 return -1; 460 } 461 } 462 463 if ((hapd->conf->wpa & 2) && 464 !hapd->conf->disable_pmksa_caching && 465 sta->eapol_sm && sta->eapol_sm->acct_multi_session_id) { 466 os_snprintf(buf, sizeof(buf), "%016llX", 467 (unsigned long long) 468 sta->eapol_sm->acct_multi_session_id); 469 if (!radius_msg_add_attr( 470 msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID, 471 (u8 *) buf, os_strlen(buf))) { 472 wpa_printf(MSG_INFO, 473 "Could not add Acct-Multi-Session-Id"); 474 return -1; 475 } 476 } 477 478 #ifdef CONFIG_IEEE80211R_AP 479 if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && 480 sta->wpa_sm && 481 (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) || 482 sta->auth_alg == WLAN_AUTH_FT) && 483 !hostapd_config_get_radius_attr(req_attr, 484 RADIUS_ATTR_MOBILITY_DOMAIN_ID) && 485 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID, 486 WPA_GET_BE16( 487 hapd->conf->mobility_domain))) { 488 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id"); 489 return -1; 490 } 491 #endif /* CONFIG_IEEE80211R_AP */ 492 493 if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm && 494 add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0) 495 return -1; 496 497 return 0; 498 } 499 500 501 int add_common_radius_attr(struct hostapd_data *hapd, 502 struct hostapd_radius_attr *req_attr, 503 struct sta_info *sta, 504 struct radius_msg *msg) 505 { 506 char buf[128]; 507 struct hostapd_radius_attr *attr; 508 int len; 509 510 if (!hostapd_config_get_radius_attr(req_attr, 511 RADIUS_ATTR_NAS_IP_ADDRESS) && 512 hapd->conf->own_ip_addr.af == AF_INET && 513 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS, 514 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) { 515 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address"); 516 return -1; 517 } 518 519 #ifdef CONFIG_IPV6 520 if (!hostapd_config_get_radius_attr(req_attr, 521 RADIUS_ATTR_NAS_IPV6_ADDRESS) && 522 hapd->conf->own_ip_addr.af == AF_INET6 && 523 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS, 524 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) { 525 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address"); 526 return -1; 527 } 528 #endif /* CONFIG_IPV6 */ 529 530 if (!hostapd_config_get_radius_attr(req_attr, 531 RADIUS_ATTR_NAS_IDENTIFIER) && 532 hapd->conf->nas_identifier && 533 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER, 534 (u8 *) hapd->conf->nas_identifier, 535 os_strlen(hapd->conf->nas_identifier))) { 536 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier"); 537 return -1; 538 } 539 540 len = os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":", 541 MAC2STR(hapd->own_addr)); 542 os_memcpy(&buf[len], hapd->conf->ssid.ssid, 543 hapd->conf->ssid.ssid_len); 544 len += hapd->conf->ssid.ssid_len; 545 if (!hostapd_config_get_radius_attr(req_attr, 546 RADIUS_ATTR_CALLED_STATION_ID) && 547 !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID, 548 (u8 *) buf, len)) { 549 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id"); 550 return -1; 551 } 552 553 if (!hostapd_config_get_radius_attr(req_attr, 554 RADIUS_ATTR_NAS_PORT_TYPE) && 555 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE, 556 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) { 557 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type"); 558 return -1; 559 } 560 561 #ifdef CONFIG_INTERWORKING 562 if (hapd->conf->interworking && 563 !is_zero_ether_addr(hapd->conf->hessid)) { 564 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT, 565 MAC2STR(hapd->conf->hessid)); 566 buf[sizeof(buf) - 1] = '\0'; 567 if (!hostapd_config_get_radius_attr(req_attr, 568 RADIUS_ATTR_WLAN_HESSID) && 569 !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID, 570 (u8 *) buf, os_strlen(buf))) { 571 wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID"); 572 return -1; 573 } 574 } 575 #endif /* CONFIG_INTERWORKING */ 576 577 if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0) 578 return -1; 579 580 for (attr = req_attr; attr; attr = attr->next) { 581 if (!radius_msg_add_attr(msg, attr->type, 582 wpabuf_head(attr->val), 583 wpabuf_len(attr->val))) { 584 wpa_printf(MSG_ERROR, "Could not add RADIUS " 585 "attribute"); 586 return -1; 587 } 588 } 589 590 return 0; 591 } 592 593 594 void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd, 595 struct sta_info *sta, 596 const u8 *eap, size_t len) 597 { 598 struct radius_msg *msg; 599 struct eapol_state_machine *sm = sta->eapol_sm; 600 601 if (sm == NULL) 602 return; 603 604 ieee802_1x_learn_identity(hapd, sm, eap, len); 605 606 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS " 607 "packet"); 608 609 sm->radius_identifier = radius_client_get_id(hapd->radius); 610 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, 611 sm->radius_identifier); 612 if (msg == NULL) { 613 wpa_printf(MSG_INFO, "Could not create new RADIUS packet"); 614 return; 615 } 616 617 if (radius_msg_make_authenticator(msg) < 0) { 618 wpa_printf(MSG_INFO, "Could not make Request Authenticator"); 619 goto fail; 620 } 621 622 if (sm->identity && 623 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, 624 sm->identity, sm->identity_len)) { 625 wpa_printf(MSG_INFO, "Could not add User-Name"); 626 goto fail; 627 } 628 629 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta, 630 msg) < 0) 631 goto fail; 632 633 /* TODO: should probably check MTU from driver config; 2304 is max for 634 * IEEE 802.11, but use 1400 to avoid problems with too large packets 635 */ 636 if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr, 637 RADIUS_ATTR_FRAMED_MTU) && 638 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) { 639 wpa_printf(MSG_INFO, "Could not add Framed-MTU"); 640 goto fail; 641 } 642 643 if (!radius_msg_add_eap(msg, eap, len)) { 644 wpa_printf(MSG_INFO, "Could not add EAP-Message"); 645 goto fail; 646 } 647 648 /* State attribute must be copied if and only if this packet is 649 * Access-Request reply to the previous Access-Challenge */ 650 if (sm->last_recv_radius && 651 radius_msg_get_hdr(sm->last_recv_radius)->code == 652 RADIUS_CODE_ACCESS_CHALLENGE) { 653 int res = radius_msg_copy_attr(msg, sm->last_recv_radius, 654 RADIUS_ATTR_STATE); 655 if (res < 0) { 656 wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge"); 657 goto fail; 658 } 659 if (res > 0) { 660 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute"); 661 } 662 } 663 664 if (hapd->conf->radius_request_cui) { 665 const u8 *cui; 666 size_t cui_len; 667 /* Add previously learned CUI or nul CUI to request CUI */ 668 if (sm->radius_cui) { 669 cui = wpabuf_head(sm->radius_cui); 670 cui_len = wpabuf_len(sm->radius_cui); 671 } else { 672 cui = (const u8 *) "\0"; 673 cui_len = 1; 674 } 675 if (!radius_msg_add_attr(msg, 676 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, 677 cui, cui_len)) { 678 wpa_printf(MSG_ERROR, "Could not add CUI"); 679 goto fail; 680 } 681 } 682 683 #ifdef CONFIG_HS20 684 if (hapd->conf->hs20) { 685 u8 ver = hapd->conf->hs20_release - 1; 686 687 if (!radius_msg_add_wfa( 688 msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION, 689 &ver, 1)) { 690 wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP " 691 "version"); 692 goto fail; 693 } 694 695 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) { 696 const u8 *pos; 697 u8 buf[3]; 698 u16 id; 699 pos = wpabuf_head_u8(sta->hs20_ie); 700 buf[0] = (*pos) >> 4; 701 if (((*pos) & HS20_PPS_MO_ID_PRESENT) && 702 wpabuf_len(sta->hs20_ie) >= 3) 703 id = WPA_GET_LE16(pos + 1); 704 else 705 id = 0; 706 WPA_PUT_BE16(buf + 1, id); 707 if (!radius_msg_add_wfa( 708 msg, 709 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION, 710 buf, sizeof(buf))) { 711 wpa_printf(MSG_ERROR, "Could not add HS 2.0 " 712 "STA version"); 713 goto fail; 714 } 715 } 716 717 if (sta->roaming_consortium && 718 !radius_msg_add_wfa( 719 msg, RADIUS_VENDOR_ATTR_WFA_HS20_ROAMING_CONSORTIUM, 720 wpabuf_head(sta->roaming_consortium), 721 wpabuf_len(sta->roaming_consortium))) { 722 wpa_printf(MSG_ERROR, 723 "Could not add HS 2.0 Roaming Consortium"); 724 goto fail; 725 } 726 727 if (hapd->conf->t_c_filename) { 728 be32 timestamp; 729 730 if (!radius_msg_add_wfa( 731 msg, 732 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILENAME, 733 (const u8 *) hapd->conf->t_c_filename, 734 os_strlen(hapd->conf->t_c_filename))) { 735 wpa_printf(MSG_ERROR, 736 "Could not add HS 2.0 T&C Filename"); 737 goto fail; 738 } 739 740 timestamp = host_to_be32(hapd->conf->t_c_timestamp); 741 if (!radius_msg_add_wfa( 742 msg, 743 RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP, 744 (const u8 *) ×tamp, 745 sizeof(timestamp))) { 746 wpa_printf(MSG_ERROR, 747 "Could not add HS 2.0 Timestamp"); 748 goto fail; 749 } 750 } 751 } 752 #endif /* CONFIG_HS20 */ 753 754 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0) 755 goto fail; 756 757 return; 758 759 fail: 760 radius_msg_free(msg); 761 } 762 #endif /* CONFIG_NO_RADIUS */ 763 764 765 static void handle_eap_response(struct hostapd_data *hapd, 766 struct sta_info *sta, struct eap_hdr *eap, 767 size_t len) 768 { 769 u8 type, *data; 770 struct eapol_state_machine *sm = sta->eapol_sm; 771 if (sm == NULL) 772 return; 773 774 data = (u8 *) (eap + 1); 775 776 if (len < sizeof(*eap) + 1) { 777 wpa_printf(MSG_INFO, "handle_eap_response: too short response data"); 778 return; 779 } 780 781 sm->eap_type_supp = type = data[0]; 782 783 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 784 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " 785 "id=%d len=%d) from STA: EAP Response-%s (%d)", 786 eap->code, eap->identifier, be_to_host16(eap->length), 787 eap_server_get_name(0, type), type); 788 789 sm->dot1xAuthEapolRespFramesRx++; 790 791 wpabuf_free(sm->eap_if->eapRespData); 792 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); 793 sm->eapolEap = TRUE; 794 } 795 796 797 static void handle_eap_initiate(struct hostapd_data *hapd, 798 struct sta_info *sta, struct eap_hdr *eap, 799 size_t len) 800 { 801 #ifdef CONFIG_ERP 802 u8 type, *data; 803 struct eapol_state_machine *sm = sta->eapol_sm; 804 805 if (sm == NULL) 806 return; 807 808 if (len < sizeof(*eap) + 1) { 809 wpa_printf(MSG_INFO, 810 "handle_eap_initiate: too short response data"); 811 return; 812 } 813 814 data = (u8 *) (eap + 1); 815 type = data[0]; 816 817 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 818 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " 819 "id=%d len=%d) from STA: EAP Initiate type %u", 820 eap->code, eap->identifier, be_to_host16(eap->length), 821 type); 822 823 wpabuf_free(sm->eap_if->eapRespData); 824 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); 825 sm->eapolEap = TRUE; 826 #endif /* CONFIG_ERP */ 827 } 828 829 830 /* Process incoming EAP packet from Supplicant */ 831 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta, 832 u8 *buf, size_t len) 833 { 834 struct eap_hdr *eap; 835 u16 eap_len; 836 837 if (len < sizeof(*eap)) { 838 wpa_printf(MSG_INFO, " too short EAP packet"); 839 return; 840 } 841 842 eap = (struct eap_hdr *) buf; 843 844 eap_len = be_to_host16(eap->length); 845 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d", 846 eap->code, eap->identifier, eap_len); 847 if (eap_len < sizeof(*eap)) { 848 wpa_printf(MSG_DEBUG, " Invalid EAP length"); 849 return; 850 } else if (eap_len > len) { 851 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP " 852 "packet"); 853 return; 854 } else if (eap_len < len) { 855 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP " 856 "packet", (unsigned long) len - eap_len); 857 } 858 859 switch (eap->code) { 860 case EAP_CODE_REQUEST: 861 wpa_printf(MSG_DEBUG, " (request)"); 862 return; 863 case EAP_CODE_RESPONSE: 864 wpa_printf(MSG_DEBUG, " (response)"); 865 handle_eap_response(hapd, sta, eap, eap_len); 866 break; 867 case EAP_CODE_SUCCESS: 868 wpa_printf(MSG_DEBUG, " (success)"); 869 return; 870 case EAP_CODE_FAILURE: 871 wpa_printf(MSG_DEBUG, " (failure)"); 872 return; 873 case EAP_CODE_INITIATE: 874 wpa_printf(MSG_DEBUG, " (initiate)"); 875 handle_eap_initiate(hapd, sta, eap, eap_len); 876 break; 877 case EAP_CODE_FINISH: 878 wpa_printf(MSG_DEBUG, " (finish)"); 879 break; 880 default: 881 wpa_printf(MSG_DEBUG, " (unknown code)"); 882 return; 883 } 884 } 885 886 887 struct eapol_state_machine * 888 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta) 889 { 890 int flags = 0; 891 if (sta->flags & WLAN_STA_PREAUTH) 892 flags |= EAPOL_SM_PREAUTH; 893 if (sta->wpa_sm) { 894 flags |= EAPOL_SM_USES_WPA; 895 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) 896 flags |= EAPOL_SM_FROM_PMKSA_CACHE; 897 } 898 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags, 899 sta->wps_ie, sta->p2p_ie, sta, 900 sta->identity, sta->radius_cui); 901 } 902 903 904 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf, 905 size_t len) 906 { 907 if (sta->pending_eapol_rx) { 908 wpabuf_free(sta->pending_eapol_rx->buf); 909 } else { 910 sta->pending_eapol_rx = 911 os_malloc(sizeof(*sta->pending_eapol_rx)); 912 if (!sta->pending_eapol_rx) 913 return; 914 } 915 916 sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len); 917 if (!sta->pending_eapol_rx->buf) { 918 os_free(sta->pending_eapol_rx); 919 sta->pending_eapol_rx = NULL; 920 return; 921 } 922 923 os_get_reltime(&sta->pending_eapol_rx->rx_time); 924 } 925 926 927 /** 928 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant 929 * @hapd: hostapd BSS data 930 * @sa: Source address (sender of the EAPOL frame) 931 * @buf: EAPOL frame 932 * @len: Length of buf in octets 933 * 934 * This function is called for each incoming EAPOL frame from the interface 935 */ 936 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf, 937 size_t len) 938 { 939 struct sta_info *sta; 940 struct ieee802_1x_hdr *hdr; 941 struct ieee802_1x_eapol_key *key; 942 u16 datalen; 943 struct rsn_pmksa_cache_entry *pmksa; 944 int key_mgmt; 945 946 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen && 947 !hapd->conf->wps_state) 948 return; 949 950 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR, 951 (unsigned long) len, MAC2STR(sa)); 952 sta = ap_get_sta(hapd, sa); 953 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) && 954 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) { 955 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not " 956 "associated/Pre-authenticating STA"); 957 958 if (sta && (sta->flags & WLAN_STA_AUTH)) { 959 wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR 960 " for later use", MAC2STR(sta->addr)); 961 ieee802_1x_save_eapol(sta, buf, len); 962 } 963 964 return; 965 } 966 967 if (len < sizeof(*hdr)) { 968 wpa_printf(MSG_INFO, " too short IEEE 802.1X packet"); 969 return; 970 } 971 972 hdr = (struct ieee802_1x_hdr *) buf; 973 datalen = be_to_host16(hdr->length); 974 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d", 975 hdr->version, hdr->type, datalen); 976 977 if (len - sizeof(*hdr) < datalen) { 978 wpa_printf(MSG_INFO, " frame too short for this IEEE 802.1X packet"); 979 if (sta->eapol_sm) 980 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++; 981 return; 982 } 983 if (len - sizeof(*hdr) > datalen) { 984 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after " 985 "IEEE 802.1X packet", 986 (unsigned long) len - sizeof(*hdr) - datalen); 987 } 988 989 if (sta->eapol_sm) { 990 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version; 991 sta->eapol_sm->dot1xAuthEapolFramesRx++; 992 } 993 994 key = (struct ieee802_1x_eapol_key *) (hdr + 1); 995 if (datalen >= sizeof(struct ieee802_1x_eapol_key) && 996 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY && 997 (key->type == EAPOL_KEY_TYPE_WPA || 998 key->type == EAPOL_KEY_TYPE_RSN)) { 999 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr, 1000 sizeof(*hdr) + datalen); 1001 return; 1002 } 1003 1004 if (!hapd->conf->ieee802_1x && !hapd->conf->osen && 1005 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) { 1006 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 1007 "802.1X not enabled and WPS not used"); 1008 return; 1009 } 1010 1011 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 1012 if (key_mgmt != -1 && 1013 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE || 1014 key_mgmt == WPA_KEY_MGMT_DPP)) { 1015 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 1016 "STA is using PSK"); 1017 return; 1018 } 1019 1020 if (!sta->eapol_sm) { 1021 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 1022 if (!sta->eapol_sm) 1023 return; 1024 1025 #ifdef CONFIG_WPS 1026 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) { 1027 u32 wflags = sta->flags & (WLAN_STA_WPS | 1028 WLAN_STA_WPS2 | 1029 WLAN_STA_MAYBE_WPS); 1030 if (wflags == WLAN_STA_MAYBE_WPS || 1031 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) { 1032 /* 1033 * Delay EAPOL frame transmission until a 1034 * possible WPS STA initiates the handshake 1035 * with EAPOL-Start. Only allow the wait to be 1036 * skipped if the STA is known to support WPS 1037 * 2.0. 1038 */ 1039 wpa_printf(MSG_DEBUG, "WPS: Do not start " 1040 "EAPOL until EAPOL-Start is " 1041 "received"); 1042 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 1043 } 1044 } 1045 #endif /* CONFIG_WPS */ 1046 1047 sta->eapol_sm->eap_if->portEnabled = TRUE; 1048 } 1049 1050 /* since we support version 1, we can ignore version field and proceed 1051 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */ 1052 /* TODO: actually, we are not version 1 anymore.. However, Version 2 1053 * does not change frame contents, so should be ok to process frames 1054 * more or less identically. Some changes might be needed for 1055 * verification of fields. */ 1056 1057 switch (hdr->type) { 1058 case IEEE802_1X_TYPE_EAP_PACKET: 1059 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen); 1060 break; 1061 1062 case IEEE802_1X_TYPE_EAPOL_START: 1063 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1064 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start " 1065 "from STA"); 1066 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 1067 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 1068 if (pmksa) { 1069 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 1070 HOSTAPD_LEVEL_DEBUG, "cached PMKSA " 1071 "available - ignore it since " 1072 "STA sent EAPOL-Start"); 1073 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa); 1074 } 1075 sta->eapol_sm->eapolStart = TRUE; 1076 sta->eapol_sm->dot1xAuthEapolStartFramesRx++; 1077 eap_server_clear_identity(sta->eapol_sm->eap); 1078 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 1079 break; 1080 1081 case IEEE802_1X_TYPE_EAPOL_LOGOFF: 1082 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1083 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff " 1084 "from STA"); 1085 sta->acct_terminate_cause = 1086 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1087 accounting_sta_stop(hapd, sta); 1088 sta->eapol_sm->eapolLogoff = TRUE; 1089 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++; 1090 eap_server_clear_identity(sta->eapol_sm->eap); 1091 break; 1092 1093 case IEEE802_1X_TYPE_EAPOL_KEY: 1094 wpa_printf(MSG_DEBUG, " EAPOL-Key"); 1095 if (!ap_sta_is_authorized(sta)) { 1096 wpa_printf(MSG_DEBUG, " Dropped key data from " 1097 "unauthorized Supplicant"); 1098 break; 1099 } 1100 break; 1101 1102 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT: 1103 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert"); 1104 /* TODO: implement support for this; show data */ 1105 break; 1106 1107 default: 1108 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type"); 1109 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++; 1110 break; 1111 } 1112 1113 eapol_auth_step(sta->eapol_sm); 1114 } 1115 1116 1117 /** 1118 * ieee802_1x_new_station - Start IEEE 802.1X authentication 1119 * @hapd: hostapd BSS data 1120 * @sta: The station 1121 * 1122 * This function is called to start IEEE 802.1X authentication when a new 1123 * station completes IEEE 802.11 association. 1124 */ 1125 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta) 1126 { 1127 struct rsn_pmksa_cache_entry *pmksa; 1128 int reassoc = 1; 1129 int force_1x = 0; 1130 int key_mgmt; 1131 1132 #ifdef CONFIG_WPS 1133 if (hapd->conf->wps_state && 1134 ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) || 1135 (sta->flags & WLAN_STA_WPS))) { 1136 /* 1137 * Need to enable IEEE 802.1X/EAPOL state machines for possible 1138 * WPS handshake even if IEEE 802.1X/EAPOL is not used for 1139 * authentication in this BSS. 1140 */ 1141 force_1x = 1; 1142 } 1143 #endif /* CONFIG_WPS */ 1144 1145 if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) { 1146 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - " 1147 "802.1X not enabled or forced for WPS"); 1148 /* 1149 * Clear any possible EAPOL authenticator state to support 1150 * reassociation change from WPS to PSK. 1151 */ 1152 ieee802_1x_free_station(hapd, sta); 1153 return; 1154 } 1155 1156 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 1157 if (key_mgmt != -1 && 1158 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE || 1159 key_mgmt == WPA_KEY_MGMT_DPP)) { 1160 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK"); 1161 /* 1162 * Clear any possible EAPOL authenticator state to support 1163 * reassociation change from WPA-EAP to PSK. 1164 */ 1165 ieee802_1x_free_station(hapd, sta); 1166 return; 1167 } 1168 1169 if (sta->eapol_sm == NULL) { 1170 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1171 HOSTAPD_LEVEL_DEBUG, "start authentication"); 1172 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 1173 if (sta->eapol_sm == NULL) { 1174 hostapd_logger(hapd, sta->addr, 1175 HOSTAPD_MODULE_IEEE8021X, 1176 HOSTAPD_LEVEL_INFO, 1177 "failed to allocate state machine"); 1178 return; 1179 } 1180 reassoc = 0; 1181 } 1182 1183 #ifdef CONFIG_WPS 1184 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 1185 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state && 1186 !(sta->flags & WLAN_STA_WPS2)) { 1187 /* 1188 * Delay EAPOL frame transmission until a possible WPS STA 1189 * initiates the handshake with EAPOL-Start. Only allow the 1190 * wait to be skipped if the STA is known to support WPS 2.0. 1191 */ 1192 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until " 1193 "EAPOL-Start is received"); 1194 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 1195 } 1196 #endif /* CONFIG_WPS */ 1197 1198 sta->eapol_sm->eap_if->portEnabled = TRUE; 1199 1200 #ifdef CONFIG_IEEE80211R_AP 1201 if (sta->auth_alg == WLAN_AUTH_FT) { 1202 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1203 HOSTAPD_LEVEL_DEBUG, 1204 "PMK from FT - skip IEEE 802.1X/EAP"); 1205 /* Setup EAPOL state machines to already authenticated state 1206 * because of existing FT information from R0KH. */ 1207 sta->eapol_sm->keyRun = TRUE; 1208 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1209 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1210 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1211 sta->eapol_sm->authSuccess = TRUE; 1212 sta->eapol_sm->authFail = FALSE; 1213 sta->eapol_sm->portValid = TRUE; 1214 if (sta->eapol_sm->eap) 1215 eap_sm_notify_cached(sta->eapol_sm->eap); 1216 ap_sta_bind_vlan(hapd, sta); 1217 return; 1218 } 1219 #endif /* CONFIG_IEEE80211R_AP */ 1220 1221 #ifdef CONFIG_FILS 1222 if (sta->auth_alg == WLAN_AUTH_FILS_SK || 1223 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || 1224 sta->auth_alg == WLAN_AUTH_FILS_PK) { 1225 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1226 HOSTAPD_LEVEL_DEBUG, 1227 "PMK from FILS - skip IEEE 802.1X/EAP"); 1228 /* Setup EAPOL state machines to already authenticated state 1229 * because of existing FILS information. */ 1230 sta->eapol_sm->keyRun = TRUE; 1231 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1232 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1233 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1234 sta->eapol_sm->authSuccess = TRUE; 1235 sta->eapol_sm->authFail = FALSE; 1236 sta->eapol_sm->portValid = TRUE; 1237 if (sta->eapol_sm->eap) 1238 eap_sm_notify_cached(sta->eapol_sm->eap); 1239 return; 1240 } 1241 #endif /* CONFIG_FILS */ 1242 1243 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 1244 if (pmksa) { 1245 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1246 HOSTAPD_LEVEL_DEBUG, 1247 "PMK from PMKSA cache - skip IEEE 802.1X/EAP"); 1248 /* Setup EAPOL state machines to already authenticated state 1249 * because of existing PMKSA information in the cache. */ 1250 sta->eapol_sm->keyRun = TRUE; 1251 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1252 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1253 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1254 sta->eapol_sm->authSuccess = TRUE; 1255 sta->eapol_sm->authFail = FALSE; 1256 if (sta->eapol_sm->eap) 1257 eap_sm_notify_cached(sta->eapol_sm->eap); 1258 pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm); 1259 ap_sta_bind_vlan(hapd, sta); 1260 } else { 1261 if (reassoc) { 1262 /* 1263 * Force EAPOL state machines to start 1264 * re-authentication without having to wait for the 1265 * Supplicant to send EAPOL-Start. 1266 */ 1267 sta->eapol_sm->reAuthenticate = TRUE; 1268 } 1269 eapol_auth_step(sta->eapol_sm); 1270 } 1271 } 1272 1273 1274 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta) 1275 { 1276 struct eapol_state_machine *sm = sta->eapol_sm; 1277 1278 #ifdef CONFIG_HS20 1279 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta); 1280 #endif /* CONFIG_HS20 */ 1281 1282 if (sta->pending_eapol_rx) { 1283 wpabuf_free(sta->pending_eapol_rx->buf); 1284 os_free(sta->pending_eapol_rx); 1285 sta->pending_eapol_rx = NULL; 1286 } 1287 1288 if (sm == NULL) 1289 return; 1290 1291 sta->eapol_sm = NULL; 1292 1293 #ifndef CONFIG_NO_RADIUS 1294 radius_msg_free(sm->last_recv_radius); 1295 radius_free_class(&sm->radius_class); 1296 #endif /* CONFIG_NO_RADIUS */ 1297 1298 eapol_auth_free(sm); 1299 } 1300 1301 1302 #ifndef CONFIG_NO_RADIUS 1303 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd, 1304 struct sta_info *sta) 1305 { 1306 struct wpabuf *eap; 1307 const struct eap_hdr *hdr; 1308 int eap_type = -1; 1309 char buf[64]; 1310 struct radius_msg *msg; 1311 struct eapol_state_machine *sm = sta->eapol_sm; 1312 1313 if (sm == NULL || sm->last_recv_radius == NULL) { 1314 if (sm) 1315 sm->eap_if->aaaEapNoReq = TRUE; 1316 return; 1317 } 1318 1319 msg = sm->last_recv_radius; 1320 1321 eap = radius_msg_get_eap(msg); 1322 if (eap == NULL) { 1323 /* RFC 3579, Chap. 2.6.3: 1324 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message 1325 * attribute */ 1326 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1327 HOSTAPD_LEVEL_WARNING, "could not extract " 1328 "EAP-Message from RADIUS message"); 1329 sm->eap_if->aaaEapNoReq = TRUE; 1330 return; 1331 } 1332 1333 if (wpabuf_len(eap) < sizeof(*hdr)) { 1334 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1335 HOSTAPD_LEVEL_WARNING, "too short EAP packet " 1336 "received from authentication server"); 1337 wpabuf_free(eap); 1338 sm->eap_if->aaaEapNoReq = TRUE; 1339 return; 1340 } 1341 1342 if (wpabuf_len(eap) > sizeof(*hdr)) 1343 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)]; 1344 1345 hdr = wpabuf_head(eap); 1346 switch (hdr->code) { 1347 case EAP_CODE_REQUEST: 1348 if (eap_type >= 0) 1349 sm->eap_type_authsrv = eap_type; 1350 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)", 1351 eap_server_get_name(0, eap_type), eap_type); 1352 break; 1353 case EAP_CODE_RESPONSE: 1354 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)", 1355 eap_server_get_name(0, eap_type), eap_type); 1356 break; 1357 case EAP_CODE_SUCCESS: 1358 os_strlcpy(buf, "EAP Success", sizeof(buf)); 1359 break; 1360 case EAP_CODE_FAILURE: 1361 os_strlcpy(buf, "EAP Failure", sizeof(buf)); 1362 break; 1363 default: 1364 os_strlcpy(buf, "unknown EAP code", sizeof(buf)); 1365 break; 1366 } 1367 buf[sizeof(buf) - 1] = '\0'; 1368 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1369 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d " 1370 "id=%d len=%d) from RADIUS server: %s", 1371 hdr->code, hdr->identifier, be_to_host16(hdr->length), 1372 buf); 1373 sm->eap_if->aaaEapReq = TRUE; 1374 1375 wpabuf_free(sm->eap_if->aaaEapReqData); 1376 sm->eap_if->aaaEapReqData = eap; 1377 } 1378 1379 1380 static void ieee802_1x_get_keys(struct hostapd_data *hapd, 1381 struct sta_info *sta, struct radius_msg *msg, 1382 struct radius_msg *req, 1383 const u8 *shared_secret, 1384 size_t shared_secret_len) 1385 { 1386 struct radius_ms_mppe_keys *keys; 1387 struct eapol_state_machine *sm = sta->eapol_sm; 1388 if (sm == NULL) 1389 return; 1390 1391 keys = radius_msg_get_ms_keys(msg, req, shared_secret, 1392 shared_secret_len); 1393 1394 if (keys && keys->send && keys->recv) { 1395 size_t len = keys->send_len + keys->recv_len; 1396 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key", 1397 keys->send, keys->send_len); 1398 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key", 1399 keys->recv, keys->recv_len); 1400 1401 os_free(sm->eap_if->aaaEapKeyData); 1402 sm->eap_if->aaaEapKeyData = os_malloc(len); 1403 if (sm->eap_if->aaaEapKeyData) { 1404 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv, 1405 keys->recv_len); 1406 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len, 1407 keys->send, keys->send_len); 1408 sm->eap_if->aaaEapKeyDataLen = len; 1409 sm->eap_if->aaaEapKeyAvailable = TRUE; 1410 } 1411 } else { 1412 wpa_printf(MSG_DEBUG, 1413 "MS-MPPE: 1x_get_keys, could not get keys: %p send: %p recv: %p", 1414 keys, keys ? keys->send : NULL, 1415 keys ? keys->recv : NULL); 1416 } 1417 1418 if (keys) { 1419 os_free(keys->send); 1420 os_free(keys->recv); 1421 os_free(keys); 1422 } 1423 } 1424 1425 1426 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd, 1427 struct sta_info *sta, 1428 struct radius_msg *msg) 1429 { 1430 u8 *attr_class; 1431 size_t class_len; 1432 struct eapol_state_machine *sm = sta->eapol_sm; 1433 int count, i; 1434 struct radius_attr_data *nclass; 1435 size_t nclass_count; 1436 1437 if (!hapd->conf->radius->acct_server || hapd->radius == NULL || 1438 sm == NULL) 1439 return; 1440 1441 radius_free_class(&sm->radius_class); 1442 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1); 1443 if (count <= 0) 1444 return; 1445 1446 nclass = os_calloc(count, sizeof(struct radius_attr_data)); 1447 if (nclass == NULL) 1448 return; 1449 1450 nclass_count = 0; 1451 1452 attr_class = NULL; 1453 for (i = 0; i < count; i++) { 1454 do { 1455 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS, 1456 &attr_class, &class_len, 1457 attr_class) < 0) { 1458 i = count; 1459 break; 1460 } 1461 } while (class_len < 1); 1462 1463 nclass[nclass_count].data = os_memdup(attr_class, class_len); 1464 if (nclass[nclass_count].data == NULL) 1465 break; 1466 1467 nclass[nclass_count].len = class_len; 1468 nclass_count++; 1469 } 1470 1471 sm->radius_class.attr = nclass; 1472 sm->radius_class.count = nclass_count; 1473 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class " 1474 "attributes for " MACSTR, 1475 (unsigned long) sm->radius_class.count, 1476 MAC2STR(sta->addr)); 1477 } 1478 1479 1480 /* Update sta->identity based on User-Name attribute in Access-Accept */ 1481 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd, 1482 struct sta_info *sta, 1483 struct radius_msg *msg) 1484 { 1485 u8 *buf, *identity; 1486 size_t len; 1487 struct eapol_state_machine *sm = sta->eapol_sm; 1488 1489 if (sm == NULL) 1490 return; 1491 1492 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len, 1493 NULL) < 0) 1494 return; 1495 1496 identity = (u8 *) dup_binstr(buf, len); 1497 if (identity == NULL) 1498 return; 1499 1500 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1501 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with " 1502 "User-Name from Access-Accept '%s'", 1503 sm->identity ? (char *) sm->identity : "N/A", 1504 (char *) identity); 1505 1506 os_free(sm->identity); 1507 sm->identity = identity; 1508 sm->identity_len = len; 1509 } 1510 1511 1512 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */ 1513 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd, 1514 struct sta_info *sta, 1515 struct radius_msg *msg) 1516 { 1517 struct eapol_state_machine *sm = sta->eapol_sm; 1518 struct wpabuf *cui; 1519 u8 *buf; 1520 size_t len; 1521 1522 if (sm == NULL) 1523 return; 1524 1525 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, 1526 &buf, &len, NULL) < 0) 1527 return; 1528 1529 cui = wpabuf_alloc_copy(buf, len); 1530 if (cui == NULL) 1531 return; 1532 1533 wpabuf_free(sm->radius_cui); 1534 sm->radius_cui = cui; 1535 } 1536 1537 1538 #ifdef CONFIG_HS20 1539 1540 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len) 1541 { 1542 sta->remediation = 1; 1543 os_free(sta->remediation_url); 1544 if (len > 2) { 1545 sta->remediation_url = os_malloc(len); 1546 if (!sta->remediation_url) 1547 return; 1548 sta->remediation_method = pos[0]; 1549 os_memcpy(sta->remediation_url, pos + 1, len - 1); 1550 sta->remediation_url[len - 1] = '\0'; 1551 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " 1552 "for " MACSTR " - server method %u URL %s", 1553 MAC2STR(sta->addr), sta->remediation_method, 1554 sta->remediation_url); 1555 } else { 1556 sta->remediation_url = NULL; 1557 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " 1558 "for " MACSTR, MAC2STR(sta->addr)); 1559 } 1560 /* TODO: assign the STA into remediation VLAN or add filtering */ 1561 } 1562 1563 1564 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd, 1565 struct sta_info *sta, u8 *pos, 1566 size_t len) 1567 { 1568 if (len < 3) 1569 return; /* Malformed information */ 1570 sta->hs20_deauth_requested = 1; 1571 wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u " 1572 "Re-auth Delay %u", 1573 *pos, WPA_GET_LE16(pos + 1)); 1574 wpabuf_free(sta->hs20_deauth_req); 1575 sta->hs20_deauth_req = wpabuf_alloc(len + 1); 1576 if (sta->hs20_deauth_req) { 1577 wpabuf_put_data(sta->hs20_deauth_req, pos, 3); 1578 wpabuf_put_u8(sta->hs20_deauth_req, len - 3); 1579 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3); 1580 } 1581 ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout); 1582 } 1583 1584 1585 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd, 1586 struct sta_info *sta, u8 *pos, 1587 size_t len, int session_timeout) 1588 { 1589 unsigned int swt; 1590 int warning_time, beacon_int; 1591 1592 if (len < 1) 1593 return; /* Malformed information */ 1594 os_free(sta->hs20_session_info_url); 1595 sta->hs20_session_info_url = os_malloc(len); 1596 if (sta->hs20_session_info_url == NULL) 1597 return; 1598 swt = pos[0]; 1599 os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1); 1600 sta->hs20_session_info_url[len - 1] = '\0'; 1601 wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u " 1602 "(session_timeout=%d)", 1603 sta->hs20_session_info_url, swt, session_timeout); 1604 if (session_timeout < 0) { 1605 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL"); 1606 return; 1607 } 1608 if (swt == 255) 1609 swt = 1; /* Use one minute as the AP selected value */ 1610 1611 if ((unsigned int) session_timeout < swt * 60) 1612 warning_time = 0; 1613 else 1614 warning_time = session_timeout - swt * 60; 1615 1616 beacon_int = hapd->iconf->beacon_int; 1617 if (beacon_int < 1) 1618 beacon_int = 100; /* best guess */ 1619 sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128; 1620 if (sta->hs20_disassoc_timer > 65535) 1621 sta->hs20_disassoc_timer = 65535; 1622 1623 ap_sta_session_warning_timeout(hapd, sta, warning_time); 1624 } 1625 1626 1627 static void ieee802_1x_hs20_t_c_filtering(struct hostapd_data *hapd, 1628 struct sta_info *sta, u8 *pos, 1629 size_t len) 1630 { 1631 if (len < 4) 1632 return; /* Malformed information */ 1633 wpa_printf(MSG_DEBUG, 1634 "HS 2.0: Terms and Conditions filtering %02x %02x %02x %02x", 1635 pos[0], pos[1], pos[2], pos[3]); 1636 hs20_t_c_filtering(hapd, sta, pos[0] & BIT(0)); 1637 } 1638 1639 1640 static void ieee802_1x_hs20_t_c_url(struct hostapd_data *hapd, 1641 struct sta_info *sta, u8 *pos, size_t len) 1642 { 1643 os_free(sta->t_c_url); 1644 sta->t_c_url = os_malloc(len + 1); 1645 if (!sta->t_c_url) 1646 return; 1647 os_memcpy(sta->t_c_url, pos, len); 1648 sta->t_c_url[len] = '\0'; 1649 wpa_printf(MSG_DEBUG, 1650 "HS 2.0: Terms and Conditions URL %s", sta->t_c_url); 1651 } 1652 1653 #endif /* CONFIG_HS20 */ 1654 1655 1656 static void ieee802_1x_check_hs20(struct hostapd_data *hapd, 1657 struct sta_info *sta, 1658 struct radius_msg *msg, 1659 int session_timeout) 1660 { 1661 #ifdef CONFIG_HS20 1662 u8 *buf, *pos, *end, type, sublen; 1663 size_t len; 1664 1665 buf = NULL; 1666 sta->remediation = 0; 1667 sta->hs20_deauth_requested = 0; 1668 1669 for (;;) { 1670 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC, 1671 &buf, &len, buf) < 0) 1672 break; 1673 if (len < 6) 1674 continue; 1675 pos = buf; 1676 end = buf + len; 1677 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) 1678 continue; 1679 pos += 4; 1680 1681 type = *pos++; 1682 sublen = *pos++; 1683 if (sublen < 2) 1684 continue; /* invalid length */ 1685 sublen -= 2; /* skip header */ 1686 if (pos + sublen > end) 1687 continue; /* invalid WFA VSA */ 1688 1689 switch (type) { 1690 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION: 1691 ieee802_1x_hs20_sub_rem(sta, pos, sublen); 1692 break; 1693 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ: 1694 ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen); 1695 break; 1696 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL: 1697 ieee802_1x_hs20_session_info(hapd, sta, pos, sublen, 1698 session_timeout); 1699 break; 1700 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING: 1701 ieee802_1x_hs20_t_c_filtering(hapd, sta, pos, sublen); 1702 break; 1703 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL: 1704 ieee802_1x_hs20_t_c_url(hapd, sta, pos, sublen); 1705 break; 1706 } 1707 } 1708 #endif /* CONFIG_HS20 */ 1709 } 1710 1711 1712 struct sta_id_search { 1713 u8 identifier; 1714 struct eapol_state_machine *sm; 1715 }; 1716 1717 1718 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd, 1719 struct sta_info *sta, 1720 void *ctx) 1721 { 1722 struct sta_id_search *id_search = ctx; 1723 struct eapol_state_machine *sm = sta->eapol_sm; 1724 1725 if (sm && sm->radius_identifier >= 0 && 1726 sm->radius_identifier == id_search->identifier) { 1727 id_search->sm = sm; 1728 return 1; 1729 } 1730 return 0; 1731 } 1732 1733 1734 static struct eapol_state_machine * 1735 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier) 1736 { 1737 struct sta_id_search id_search; 1738 id_search.identifier = identifier; 1739 id_search.sm = NULL; 1740 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search); 1741 return id_search.sm; 1742 } 1743 1744 1745 #ifndef CONFIG_NO_VLAN 1746 static int ieee802_1x_update_vlan(struct radius_msg *msg, 1747 struct hostapd_data *hapd, 1748 struct sta_info *sta) 1749 { 1750 struct vlan_description vlan_desc; 1751 1752 os_memset(&vlan_desc, 0, sizeof(vlan_desc)); 1753 vlan_desc.notempty = !!radius_msg_get_vlanid(msg, &vlan_desc.untagged, 1754 MAX_NUM_TAGGED_VLAN, 1755 vlan_desc.tagged); 1756 1757 if (vlan_desc.notempty && 1758 !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) { 1759 sta->eapol_sm->authFail = TRUE; 1760 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, 1761 HOSTAPD_LEVEL_INFO, 1762 "Invalid VLAN %d%s received from RADIUS server", 1763 vlan_desc.untagged, 1764 vlan_desc.tagged[0] ? "+" : ""); 1765 os_memset(&vlan_desc, 0, sizeof(vlan_desc)); 1766 ap_sta_set_vlan(hapd, sta, &vlan_desc); 1767 return -1; 1768 } 1769 1770 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED && 1771 !vlan_desc.notempty) { 1772 sta->eapol_sm->authFail = TRUE; 1773 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1774 HOSTAPD_LEVEL_INFO, 1775 "authentication server did not include required VLAN ID in Access-Accept"); 1776 return -1; 1777 } 1778 1779 return ap_sta_set_vlan(hapd, sta, &vlan_desc); 1780 } 1781 #endif /* CONFIG_NO_VLAN */ 1782 1783 1784 /** 1785 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server 1786 * @msg: RADIUS response message 1787 * @req: RADIUS request message 1788 * @shared_secret: RADIUS shared secret 1789 * @shared_secret_len: Length of shared_secret in octets 1790 * @data: Context data (struct hostapd_data *) 1791 * Returns: Processing status 1792 */ 1793 static RadiusRxResult 1794 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req, 1795 const u8 *shared_secret, size_t shared_secret_len, 1796 void *data) 1797 { 1798 struct hostapd_data *hapd = data; 1799 struct sta_info *sta; 1800 u32 session_timeout = 0, termination_action, acct_interim_interval; 1801 int session_timeout_set; 1802 u32 reason_code; 1803 struct eapol_state_machine *sm; 1804 int override_eapReq = 0; 1805 struct radius_hdr *hdr = radius_msg_get_hdr(msg); 1806 1807 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier); 1808 if (sm == NULL) { 1809 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching " 1810 "station for this RADIUS message"); 1811 return RADIUS_RX_UNKNOWN; 1812 } 1813 sta = sm->sta; 1814 1815 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be 1816 * present when packet contains an EAP-Message attribute */ 1817 if (hdr->code == RADIUS_CODE_ACCESS_REJECT && 1818 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL, 1819 0) < 0 && 1820 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) { 1821 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without " 1822 "Message-Authenticator since it does not include " 1823 "EAP-Message"); 1824 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len, 1825 req, 1)) { 1826 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped"); 1827 return RADIUS_RX_INVALID_AUTHENTICATOR; 1828 } 1829 1830 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT && 1831 hdr->code != RADIUS_CODE_ACCESS_REJECT && 1832 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) { 1833 wpa_printf(MSG_INFO, "Unknown RADIUS message code"); 1834 return RADIUS_RX_UNKNOWN; 1835 } 1836 1837 sm->radius_identifier = -1; 1838 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR, 1839 MAC2STR(sta->addr)); 1840 1841 radius_msg_free(sm->last_recv_radius); 1842 sm->last_recv_radius = msg; 1843 1844 session_timeout_set = 1845 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT, 1846 &session_timeout); 1847 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION, 1848 &termination_action)) 1849 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT; 1850 1851 if (hapd->conf->acct_interim_interval == 0 && 1852 hdr->code == RADIUS_CODE_ACCESS_ACCEPT && 1853 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL, 1854 &acct_interim_interval) == 0) { 1855 if (acct_interim_interval < 60) { 1856 hostapd_logger(hapd, sta->addr, 1857 HOSTAPD_MODULE_IEEE8021X, 1858 HOSTAPD_LEVEL_INFO, 1859 "ignored too small " 1860 "Acct-Interim-Interval %d", 1861 acct_interim_interval); 1862 } else 1863 sta->acct_interim_interval = acct_interim_interval; 1864 } 1865 1866 1867 switch (hdr->code) { 1868 case RADIUS_CODE_ACCESS_ACCEPT: 1869 #ifndef CONFIG_NO_VLAN 1870 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED && 1871 ieee802_1x_update_vlan(msg, hapd, sta) < 0) 1872 break; 1873 1874 if (sta->vlan_id > 0) { 1875 hostapd_logger(hapd, sta->addr, 1876 HOSTAPD_MODULE_RADIUS, 1877 HOSTAPD_LEVEL_INFO, 1878 "VLAN ID %d", sta->vlan_id); 1879 } 1880 1881 if ((sta->flags & WLAN_STA_ASSOC) && 1882 ap_sta_bind_vlan(hapd, sta) < 0) 1883 break; 1884 #endif /* CONFIG_NO_VLAN */ 1885 1886 sta->session_timeout_set = !!session_timeout_set; 1887 os_get_reltime(&sta->session_timeout); 1888 sta->session_timeout.sec += session_timeout; 1889 1890 /* RFC 3580, Ch. 3.17 */ 1891 if (session_timeout_set && termination_action == 1892 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) 1893 sm->reAuthPeriod = session_timeout; 1894 else if (session_timeout_set) 1895 ap_sta_session_timeout(hapd, sta, session_timeout); 1896 else 1897 ap_sta_no_session_timeout(hapd, sta); 1898 1899 sm->eap_if->aaaSuccess = TRUE; 1900 override_eapReq = 1; 1901 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret, 1902 shared_secret_len); 1903 ieee802_1x_store_radius_class(hapd, sta, msg); 1904 ieee802_1x_update_sta_identity(hapd, sta, msg); 1905 ieee802_1x_update_sta_cui(hapd, sta, msg); 1906 ieee802_1x_check_hs20(hapd, sta, msg, 1907 session_timeout_set ? 1908 (int) session_timeout : -1); 1909 break; 1910 case RADIUS_CODE_ACCESS_REJECT: 1911 sm->eap_if->aaaFail = TRUE; 1912 override_eapReq = 1; 1913 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE, 1914 &reason_code) == 0) { 1915 wpa_printf(MSG_DEBUG, 1916 "RADIUS server indicated WLAN-Reason-Code %u in Access-Reject for " 1917 MACSTR, reason_code, MAC2STR(sta->addr)); 1918 sta->disconnect_reason_code = reason_code; 1919 } 1920 break; 1921 case RADIUS_CODE_ACCESS_CHALLENGE: 1922 sm->eap_if->aaaEapReq = TRUE; 1923 if (session_timeout_set) { 1924 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */ 1925 sm->eap_if->aaaMethodTimeout = session_timeout; 1926 hostapd_logger(hapd, sm->addr, 1927 HOSTAPD_MODULE_IEEE8021X, 1928 HOSTAPD_LEVEL_DEBUG, 1929 "using EAP timeout of %d seconds (from " 1930 "RADIUS)", 1931 sm->eap_if->aaaMethodTimeout); 1932 } else { 1933 /* 1934 * Use dynamic retransmission behavior per EAP 1935 * specification. 1936 */ 1937 sm->eap_if->aaaMethodTimeout = 0; 1938 } 1939 break; 1940 } 1941 1942 ieee802_1x_decapsulate_radius(hapd, sta); 1943 if (override_eapReq) 1944 sm->eap_if->aaaEapReq = FALSE; 1945 1946 #ifdef CONFIG_FILS 1947 #ifdef NEED_AP_MLME 1948 if (sta->flags & WLAN_STA_PENDING_FILS_ERP) { 1949 /* TODO: Add a PMKSA entry on success? */ 1950 ieee802_11_finish_fils_auth( 1951 hapd, sta, hdr->code == RADIUS_CODE_ACCESS_ACCEPT, 1952 sm->eap_if->aaaEapReqData, 1953 sm->eap_if->aaaEapKeyData, 1954 sm->eap_if->aaaEapKeyDataLen); 1955 } 1956 #endif /* NEED_AP_MLME */ 1957 #endif /* CONFIG_FILS */ 1958 1959 eapol_auth_step(sm); 1960 1961 return RADIUS_RX_QUEUED; 1962 } 1963 #endif /* CONFIG_NO_RADIUS */ 1964 1965 1966 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta) 1967 { 1968 struct eapol_state_machine *sm = sta->eapol_sm; 1969 if (sm == NULL) 1970 return; 1971 1972 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1973 HOSTAPD_LEVEL_DEBUG, "aborting authentication"); 1974 1975 #ifndef CONFIG_NO_RADIUS 1976 radius_msg_free(sm->last_recv_radius); 1977 sm->last_recv_radius = NULL; 1978 #endif /* CONFIG_NO_RADIUS */ 1979 1980 if (sm->eap_if->eapTimeout) { 1981 /* 1982 * Disconnect the STA since it did not reply to the last EAP 1983 * request and we cannot continue EAP processing (EAP-Failure 1984 * could only be sent if the EAP peer actually replied). 1985 */ 1986 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR, 1987 MAC2STR(sta->addr)); 1988 1989 sm->eap_if->portEnabled = FALSE; 1990 ap_sta_disconnect(hapd, sta, sta->addr, 1991 WLAN_REASON_PREV_AUTH_NOT_VALID); 1992 } 1993 } 1994 1995 1996 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd) 1997 { 1998 struct eapol_authenticator *eapol = hapd->eapol_auth; 1999 2000 if (hapd->conf->default_wep_key_len < 1) 2001 return 0; 2002 2003 os_free(eapol->default_wep_key); 2004 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len); 2005 if (eapol->default_wep_key == NULL || 2006 random_get_bytes(eapol->default_wep_key, 2007 hapd->conf->default_wep_key_len)) { 2008 wpa_printf(MSG_INFO, "Could not generate random WEP key"); 2009 os_free(eapol->default_wep_key); 2010 eapol->default_wep_key = NULL; 2011 return -1; 2012 } 2013 2014 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key", 2015 eapol->default_wep_key, 2016 hapd->conf->default_wep_key_len); 2017 2018 return 0; 2019 } 2020 2021 2022 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd, 2023 struct sta_info *sta, void *ctx) 2024 { 2025 if (sta->eapol_sm) { 2026 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 2027 eapol_auth_step(sta->eapol_sm); 2028 } 2029 return 0; 2030 } 2031 2032 2033 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx) 2034 { 2035 struct hostapd_data *hapd = eloop_ctx; 2036 struct eapol_authenticator *eapol = hapd->eapol_auth; 2037 2038 if (eapol->default_wep_key_idx >= 3) 2039 eapol->default_wep_key_idx = 2040 hapd->conf->individual_wep_key_len > 0 ? 1 : 0; 2041 else 2042 eapol->default_wep_key_idx++; 2043 2044 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d", 2045 eapol->default_wep_key_idx); 2046 2047 if (ieee802_1x_rekey_broadcast(hapd)) { 2048 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 2049 HOSTAPD_LEVEL_WARNING, "failed to generate a " 2050 "new broadcast key"); 2051 os_free(eapol->default_wep_key); 2052 eapol->default_wep_key = NULL; 2053 return; 2054 } 2055 2056 /* TODO: Could setup key for RX here, but change default TX keyid only 2057 * after new broadcast key has been sent to all stations. */ 2058 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, 2059 broadcast_ether_addr, 2060 eapol->default_wep_key_idx, 1, NULL, 0, 2061 eapol->default_wep_key, 2062 hapd->conf->default_wep_key_len)) { 2063 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 2064 HOSTAPD_LEVEL_WARNING, "failed to configure a " 2065 "new broadcast key"); 2066 os_free(eapol->default_wep_key); 2067 eapol->default_wep_key = NULL; 2068 return; 2069 } 2070 2071 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL); 2072 2073 if (hapd->conf->wep_rekeying_period > 0) { 2074 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0, 2075 ieee802_1x_rekey, hapd, NULL); 2076 } 2077 } 2078 2079 2080 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type, 2081 const u8 *data, size_t datalen) 2082 { 2083 #ifdef CONFIG_WPS 2084 struct sta_info *sta = sta_ctx; 2085 2086 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) == 2087 WLAN_STA_MAYBE_WPS) { 2088 const u8 *identity; 2089 size_t identity_len; 2090 struct eapol_state_machine *sm = sta->eapol_sm; 2091 2092 identity = eap_get_identity(sm->eap, &identity_len); 2093 if (identity && 2094 ((identity_len == WSC_ID_ENROLLEE_LEN && 2095 os_memcmp(identity, WSC_ID_ENROLLEE, 2096 WSC_ID_ENROLLEE_LEN) == 0) || 2097 (identity_len == WSC_ID_REGISTRAR_LEN && 2098 os_memcmp(identity, WSC_ID_REGISTRAR, 2099 WSC_ID_REGISTRAR_LEN) == 0))) { 2100 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> " 2101 "WLAN_STA_WPS"); 2102 sta->flags |= WLAN_STA_WPS; 2103 } 2104 } 2105 #endif /* CONFIG_WPS */ 2106 2107 ieee802_1x_send(ctx, sta_ctx, type, data, datalen); 2108 } 2109 2110 2111 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx, 2112 const u8 *data, size_t datalen) 2113 { 2114 #ifndef CONFIG_NO_RADIUS 2115 struct hostapd_data *hapd = ctx; 2116 struct sta_info *sta = sta_ctx; 2117 2118 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen); 2119 #endif /* CONFIG_NO_RADIUS */ 2120 } 2121 2122 2123 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success, 2124 int preauth, int remediation) 2125 { 2126 struct hostapd_data *hapd = ctx; 2127 struct sta_info *sta = sta_ctx; 2128 if (preauth) 2129 rsn_preauth_finished(hapd, sta, success); 2130 else 2131 ieee802_1x_finished(hapd, sta, success, remediation); 2132 } 2133 2134 2135 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity, 2136 size_t identity_len, int phase2, 2137 struct eap_user *user) 2138 { 2139 struct hostapd_data *hapd = ctx; 2140 const struct hostapd_eap_user *eap_user; 2141 int i; 2142 int rv = -1; 2143 2144 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2); 2145 if (eap_user == NULL) 2146 goto out; 2147 2148 os_memset(user, 0, sizeof(*user)); 2149 user->phase2 = phase2; 2150 for (i = 0; i < EAP_MAX_METHODS; i++) { 2151 user->methods[i].vendor = eap_user->methods[i].vendor; 2152 user->methods[i].method = eap_user->methods[i].method; 2153 } 2154 2155 if (eap_user->password) { 2156 user->password = os_memdup(eap_user->password, 2157 eap_user->password_len); 2158 if (user->password == NULL) 2159 goto out; 2160 user->password_len = eap_user->password_len; 2161 user->password_hash = eap_user->password_hash; 2162 if (eap_user->salt && eap_user->salt_len) { 2163 user->salt = os_memdup(eap_user->salt, 2164 eap_user->salt_len); 2165 if (!user->salt) 2166 goto out; 2167 user->salt_len = eap_user->salt_len; 2168 } 2169 } 2170 user->force_version = eap_user->force_version; 2171 user->macacl = eap_user->macacl; 2172 user->ttls_auth = eap_user->ttls_auth; 2173 user->remediation = eap_user->remediation; 2174 rv = 0; 2175 2176 out: 2177 if (rv) 2178 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__); 2179 2180 return rv; 2181 } 2182 2183 2184 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr) 2185 { 2186 struct hostapd_data *hapd = ctx; 2187 struct sta_info *sta; 2188 sta = ap_get_sta(hapd, addr); 2189 if (sta == NULL || sta->eapol_sm == NULL) 2190 return 0; 2191 return 1; 2192 } 2193 2194 2195 static void ieee802_1x_logger(void *ctx, const u8 *addr, 2196 eapol_logger_level level, const char *txt) 2197 { 2198 #ifndef CONFIG_NO_HOSTAPD_LOGGER 2199 struct hostapd_data *hapd = ctx; 2200 int hlevel; 2201 2202 switch (level) { 2203 case EAPOL_LOGGER_WARNING: 2204 hlevel = HOSTAPD_LEVEL_WARNING; 2205 break; 2206 case EAPOL_LOGGER_INFO: 2207 hlevel = HOSTAPD_LEVEL_INFO; 2208 break; 2209 case EAPOL_LOGGER_DEBUG: 2210 default: 2211 hlevel = HOSTAPD_LEVEL_DEBUG; 2212 break; 2213 } 2214 2215 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s", 2216 txt); 2217 #endif /* CONFIG_NO_HOSTAPD_LOGGER */ 2218 } 2219 2220 2221 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx, 2222 int authorized) 2223 { 2224 struct hostapd_data *hapd = ctx; 2225 struct sta_info *sta = sta_ctx; 2226 ieee802_1x_set_sta_authorized(hapd, sta, authorized); 2227 } 2228 2229 2230 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx) 2231 { 2232 struct hostapd_data *hapd = ctx; 2233 struct sta_info *sta = sta_ctx; 2234 ieee802_1x_abort_auth(hapd, sta); 2235 } 2236 2237 2238 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx) 2239 { 2240 #ifndef CONFIG_FIPS 2241 #ifndef CONFIG_NO_RC4 2242 struct hostapd_data *hapd = ctx; 2243 struct sta_info *sta = sta_ctx; 2244 ieee802_1x_tx_key(hapd, sta); 2245 #endif /* CONFIG_NO_RC4 */ 2246 #endif /* CONFIG_FIPS */ 2247 } 2248 2249 2250 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx, 2251 enum eapol_event type) 2252 { 2253 /* struct hostapd_data *hapd = ctx; */ 2254 struct sta_info *sta = sta_ctx; 2255 switch (type) { 2256 case EAPOL_AUTH_SM_CHANGE: 2257 wpa_auth_sm_notify(sta->wpa_sm); 2258 break; 2259 case EAPOL_AUTH_REAUTHENTICATE: 2260 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 2261 break; 2262 } 2263 } 2264 2265 2266 #ifdef CONFIG_ERP 2267 2268 static struct eap_server_erp_key * 2269 ieee802_1x_erp_get_key(void *ctx, const char *keyname) 2270 { 2271 struct hostapd_data *hapd = ctx; 2272 struct eap_server_erp_key *erp; 2273 2274 dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key, 2275 list) { 2276 if (os_strcmp(erp->keyname_nai, keyname) == 0) 2277 return erp; 2278 } 2279 2280 return NULL; 2281 } 2282 2283 2284 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp) 2285 { 2286 struct hostapd_data *hapd = ctx; 2287 2288 dl_list_add(&hapd->erp_keys, &erp->list); 2289 return 0; 2290 } 2291 2292 #endif /* CONFIG_ERP */ 2293 2294 2295 int ieee802_1x_init(struct hostapd_data *hapd) 2296 { 2297 int i; 2298 struct eapol_auth_config conf; 2299 struct eapol_auth_cb cb; 2300 2301 dl_list_init(&hapd->erp_keys); 2302 2303 os_memset(&conf, 0, sizeof(conf)); 2304 conf.ctx = hapd; 2305 conf.eap_reauth_period = hapd->conf->eap_reauth_period; 2306 conf.wpa = hapd->conf->wpa; 2307 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len; 2308 conf.eap_server = hapd->conf->eap_server; 2309 conf.ssl_ctx = hapd->ssl_ctx; 2310 conf.msg_ctx = hapd->msg_ctx; 2311 conf.eap_sim_db_priv = hapd->eap_sim_db_priv; 2312 conf.eap_req_id_text = hapd->conf->eap_req_id_text; 2313 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len; 2314 conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start; 2315 conf.erp_domain = hapd->conf->erp_domain; 2316 conf.erp = hapd->conf->eap_server_erp; 2317 conf.tls_session_lifetime = hapd->conf->tls_session_lifetime; 2318 conf.tls_flags = hapd->conf->tls_flags; 2319 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key; 2320 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id; 2321 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len; 2322 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info; 2323 conf.eap_fast_prov = hapd->conf->eap_fast_prov; 2324 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime; 2325 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time; 2326 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind; 2327 conf.tnc = hapd->conf->tnc; 2328 conf.wps = hapd->wps; 2329 conf.fragment_size = hapd->conf->fragment_size; 2330 conf.pwd_group = hapd->conf->pwd_group; 2331 conf.pbc_in_m1 = hapd->conf->pbc_in_m1; 2332 if (hapd->conf->server_id) { 2333 conf.server_id = (const u8 *) hapd->conf->server_id; 2334 conf.server_id_len = os_strlen(hapd->conf->server_id); 2335 } else { 2336 conf.server_id = (const u8 *) "hostapd"; 2337 conf.server_id_len = 7; 2338 } 2339 2340 os_memset(&cb, 0, sizeof(cb)); 2341 cb.eapol_send = ieee802_1x_eapol_send; 2342 cb.aaa_send = ieee802_1x_aaa_send; 2343 cb.finished = _ieee802_1x_finished; 2344 cb.get_eap_user = ieee802_1x_get_eap_user; 2345 cb.sta_entry_alive = ieee802_1x_sta_entry_alive; 2346 cb.logger = ieee802_1x_logger; 2347 cb.set_port_authorized = ieee802_1x_set_port_authorized; 2348 cb.abort_auth = _ieee802_1x_abort_auth; 2349 cb.tx_key = _ieee802_1x_tx_key; 2350 cb.eapol_event = ieee802_1x_eapol_event; 2351 #ifdef CONFIG_ERP 2352 cb.erp_get_key = ieee802_1x_erp_get_key; 2353 cb.erp_add_key = ieee802_1x_erp_add_key; 2354 #endif /* CONFIG_ERP */ 2355 2356 hapd->eapol_auth = eapol_auth_init(&conf, &cb); 2357 if (hapd->eapol_auth == NULL) 2358 return -1; 2359 2360 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) && 2361 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1)) 2362 return -1; 2363 2364 #ifndef CONFIG_NO_RADIUS 2365 if (radius_client_register(hapd->radius, RADIUS_AUTH, 2366 ieee802_1x_receive_auth, hapd)) 2367 return -1; 2368 #endif /* CONFIG_NO_RADIUS */ 2369 2370 if (hapd->conf->default_wep_key_len) { 2371 for (i = 0; i < 4; i++) 2372 hostapd_drv_set_key(hapd->conf->iface, hapd, 2373 WPA_ALG_NONE, NULL, i, 0, NULL, 0, 2374 NULL, 0); 2375 2376 ieee802_1x_rekey(hapd, NULL); 2377 2378 if (hapd->eapol_auth->default_wep_key == NULL) 2379 return -1; 2380 } 2381 2382 return 0; 2383 } 2384 2385 2386 void ieee802_1x_erp_flush(struct hostapd_data *hapd) 2387 { 2388 struct eap_server_erp_key *erp; 2389 2390 while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key, 2391 list)) != NULL) { 2392 dl_list_del(&erp->list); 2393 bin_clear_free(erp, sizeof(*erp)); 2394 } 2395 } 2396 2397 2398 void ieee802_1x_deinit(struct hostapd_data *hapd) 2399 { 2400 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL); 2401 2402 if (hapd->driver && hapd->drv_priv && 2403 (hapd->conf->ieee802_1x || hapd->conf->wpa)) 2404 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0); 2405 2406 eapol_auth_deinit(hapd->eapol_auth); 2407 hapd->eapol_auth = NULL; 2408 2409 ieee802_1x_erp_flush(hapd); 2410 } 2411 2412 2413 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 2414 const u8 *buf, size_t len, int ack) 2415 { 2416 struct ieee80211_hdr *hdr; 2417 u8 *pos; 2418 const unsigned char rfc1042_hdr[ETH_ALEN] = 2419 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 2420 2421 if (sta == NULL) 2422 return -1; 2423 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2) 2424 return 0; 2425 2426 hdr = (struct ieee80211_hdr *) buf; 2427 pos = (u8 *) (hdr + 1); 2428 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0) 2429 return 0; 2430 pos += sizeof(rfc1042_hdr); 2431 if (WPA_GET_BE16(pos) != ETH_P_PAE) 2432 return 0; 2433 pos += 2; 2434 2435 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos, 2436 ack); 2437 } 2438 2439 2440 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 2441 const u8 *buf, int len, int ack) 2442 { 2443 const struct ieee802_1x_hdr *xhdr = 2444 (const struct ieee802_1x_hdr *) buf; 2445 const u8 *pos = buf + sizeof(*xhdr); 2446 struct ieee802_1x_eapol_key *key; 2447 2448 if (len < (int) sizeof(*xhdr)) 2449 return 0; 2450 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d " 2451 "type=%d length=%d - ack=%d", 2452 MAC2STR(sta->addr), xhdr->version, xhdr->type, 2453 be_to_host16(xhdr->length), ack); 2454 2455 #ifdef CONFIG_WPS 2456 if (xhdr->type == IEEE802_1X_TYPE_EAP_PACKET && ack && 2457 (sta->flags & WLAN_STA_WPS) && 2458 ap_sta_pending_delayed_1x_auth_fail_disconnect(hapd, sta)) { 2459 wpa_printf(MSG_DEBUG, 2460 "WPS: Indicate EAP completion on ACK for EAP-Failure"); 2461 hostapd_wps_eap_completed(hapd); 2462 } 2463 #endif /* CONFIG_WPS */ 2464 2465 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY) 2466 return 0; 2467 2468 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) { 2469 const struct wpa_eapol_key *wpa; 2470 wpa = (const struct wpa_eapol_key *) pos; 2471 if (wpa->type == EAPOL_KEY_TYPE_RSN || 2472 wpa->type == EAPOL_KEY_TYPE_WPA) 2473 wpa_auth_eapol_key_tx_status(hapd->wpa_auth, 2474 sta->wpa_sm, ack); 2475 } 2476 2477 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant 2478 * or Authenticator state machines, but EAPOL-Key packets are not 2479 * retransmitted in case of failure. Try to re-send failed EAPOL-Key 2480 * packets couple of times because otherwise STA keys become 2481 * unsynchronized with AP. */ 2482 if (!ack && pos + sizeof(*key) <= buf + len) { 2483 key = (struct ieee802_1x_eapol_key *) pos; 2484 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 2485 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key " 2486 "frame (%scast index=%d)", 2487 key->key_index & BIT(7) ? "uni" : "broad", 2488 key->key_index & ~BIT(7)); 2489 /* TODO: re-send EAPOL-Key couple of times (with short delay 2490 * between them?). If all attempt fail, report error and 2491 * deauthenticate STA so that it will get new keys when 2492 * authenticating again (e.g., after returning in range). 2493 * Separate limit/transmit state needed both for unicast and 2494 * broadcast keys(?) */ 2495 } 2496 /* TODO: could move unicast key configuration from ieee802_1x_tx_key() 2497 * to here and change the key only if the EAPOL-Key packet was Acked. 2498 */ 2499 2500 return 1; 2501 } 2502 2503 2504 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len) 2505 { 2506 if (sm == NULL || sm->identity == NULL) 2507 return NULL; 2508 2509 *len = sm->identity_len; 2510 return sm->identity; 2511 } 2512 2513 2514 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len, 2515 int idx) 2516 { 2517 if (sm == NULL || sm->radius_class.attr == NULL || 2518 idx >= (int) sm->radius_class.count) 2519 return NULL; 2520 2521 *len = sm->radius_class.attr[idx].len; 2522 return sm->radius_class.attr[idx].data; 2523 } 2524 2525 2526 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm) 2527 { 2528 if (sm == NULL) 2529 return NULL; 2530 return sm->radius_cui; 2531 } 2532 2533 2534 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len) 2535 { 2536 *len = 0; 2537 if (sm == NULL) 2538 return NULL; 2539 2540 *len = sm->eap_if->eapKeyDataLen; 2541 return sm->eap_if->eapKeyData; 2542 } 2543 2544 2545 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm, 2546 int enabled) 2547 { 2548 if (sm == NULL) 2549 return; 2550 sm->eap_if->portEnabled = enabled ? TRUE : FALSE; 2551 eapol_auth_step(sm); 2552 } 2553 2554 2555 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, 2556 int valid) 2557 { 2558 if (sm == NULL) 2559 return; 2560 sm->portValid = valid ? TRUE : FALSE; 2561 eapol_auth_step(sm); 2562 } 2563 2564 2565 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth) 2566 { 2567 if (sm == NULL) 2568 return; 2569 if (pre_auth) 2570 sm->flags |= EAPOL_SM_PREAUTH; 2571 else 2572 sm->flags &= ~EAPOL_SM_PREAUTH; 2573 } 2574 2575 2576 static const char * bool_txt(Boolean val) 2577 { 2578 return val ? "TRUE" : "FALSE"; 2579 } 2580 2581 2582 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2583 { 2584 /* TODO */ 2585 return 0; 2586 } 2587 2588 2589 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2590 char *buf, size_t buflen) 2591 { 2592 int len = 0, ret; 2593 struct eapol_state_machine *sm = sta->eapol_sm; 2594 struct os_reltime diff; 2595 const char *name1; 2596 const char *name2; 2597 char *identity_buf = NULL; 2598 2599 if (sm == NULL) 2600 return 0; 2601 2602 ret = os_snprintf(buf + len, buflen - len, 2603 "dot1xPaePortNumber=%d\n" 2604 "dot1xPaePortProtocolVersion=%d\n" 2605 "dot1xPaePortCapabilities=1\n" 2606 "dot1xPaePortInitialize=%d\n" 2607 "dot1xPaePortReauthenticate=FALSE\n", 2608 sta->aid, 2609 EAPOL_VERSION, 2610 sm->initialize); 2611 if (os_snprintf_error(buflen - len, ret)) 2612 return len; 2613 len += ret; 2614 2615 /* dot1xAuthConfigTable */ 2616 ret = os_snprintf(buf + len, buflen - len, 2617 "dot1xAuthPaeState=%d\n" 2618 "dot1xAuthBackendAuthState=%d\n" 2619 "dot1xAuthAdminControlledDirections=%d\n" 2620 "dot1xAuthOperControlledDirections=%d\n" 2621 "dot1xAuthAuthControlledPortStatus=%d\n" 2622 "dot1xAuthAuthControlledPortControl=%d\n" 2623 "dot1xAuthQuietPeriod=%u\n" 2624 "dot1xAuthServerTimeout=%u\n" 2625 "dot1xAuthReAuthPeriod=%u\n" 2626 "dot1xAuthReAuthEnabled=%s\n" 2627 "dot1xAuthKeyTxEnabled=%s\n", 2628 sm->auth_pae_state + 1, 2629 sm->be_auth_state + 1, 2630 sm->adminControlledDirections, 2631 sm->operControlledDirections, 2632 sm->authPortStatus, 2633 sm->portControl, 2634 sm->quietPeriod, 2635 sm->serverTimeout, 2636 sm->reAuthPeriod, 2637 bool_txt(sm->reAuthEnabled), 2638 bool_txt(sm->keyTxEnabled)); 2639 if (os_snprintf_error(buflen - len, ret)) 2640 return len; 2641 len += ret; 2642 2643 /* dot1xAuthStatsTable */ 2644 ret = os_snprintf(buf + len, buflen - len, 2645 "dot1xAuthEapolFramesRx=%u\n" 2646 "dot1xAuthEapolFramesTx=%u\n" 2647 "dot1xAuthEapolStartFramesRx=%u\n" 2648 "dot1xAuthEapolLogoffFramesRx=%u\n" 2649 "dot1xAuthEapolRespIdFramesRx=%u\n" 2650 "dot1xAuthEapolRespFramesRx=%u\n" 2651 "dot1xAuthEapolReqIdFramesTx=%u\n" 2652 "dot1xAuthEapolReqFramesTx=%u\n" 2653 "dot1xAuthInvalidEapolFramesRx=%u\n" 2654 "dot1xAuthEapLengthErrorFramesRx=%u\n" 2655 "dot1xAuthLastEapolFrameVersion=%u\n" 2656 "dot1xAuthLastEapolFrameSource=" MACSTR "\n", 2657 sm->dot1xAuthEapolFramesRx, 2658 sm->dot1xAuthEapolFramesTx, 2659 sm->dot1xAuthEapolStartFramesRx, 2660 sm->dot1xAuthEapolLogoffFramesRx, 2661 sm->dot1xAuthEapolRespIdFramesRx, 2662 sm->dot1xAuthEapolRespFramesRx, 2663 sm->dot1xAuthEapolReqIdFramesTx, 2664 sm->dot1xAuthEapolReqFramesTx, 2665 sm->dot1xAuthInvalidEapolFramesRx, 2666 sm->dot1xAuthEapLengthErrorFramesRx, 2667 sm->dot1xAuthLastEapolFrameVersion, 2668 MAC2STR(sm->addr)); 2669 if (os_snprintf_error(buflen - len, ret)) 2670 return len; 2671 len += ret; 2672 2673 /* dot1xAuthDiagTable */ 2674 ret = os_snprintf(buf + len, buflen - len, 2675 "dot1xAuthEntersConnecting=%u\n" 2676 "dot1xAuthEapLogoffsWhileConnecting=%u\n" 2677 "dot1xAuthEntersAuthenticating=%u\n" 2678 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n" 2679 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n" 2680 "dot1xAuthAuthFailWhileAuthenticating=%u\n" 2681 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n" 2682 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n" 2683 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n" 2684 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n" 2685 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n" 2686 "dot1xAuthBackendResponses=%u\n" 2687 "dot1xAuthBackendAccessChallenges=%u\n" 2688 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n" 2689 "dot1xAuthBackendAuthSuccesses=%u\n" 2690 "dot1xAuthBackendAuthFails=%u\n", 2691 sm->authEntersConnecting, 2692 sm->authEapLogoffsWhileConnecting, 2693 sm->authEntersAuthenticating, 2694 sm->authAuthSuccessesWhileAuthenticating, 2695 sm->authAuthTimeoutsWhileAuthenticating, 2696 sm->authAuthFailWhileAuthenticating, 2697 sm->authAuthEapStartsWhileAuthenticating, 2698 sm->authAuthEapLogoffWhileAuthenticating, 2699 sm->authAuthReauthsWhileAuthenticated, 2700 sm->authAuthEapStartsWhileAuthenticated, 2701 sm->authAuthEapLogoffWhileAuthenticated, 2702 sm->backendResponses, 2703 sm->backendAccessChallenges, 2704 sm->backendOtherRequestsToSupplicant, 2705 sm->backendAuthSuccesses, 2706 sm->backendAuthFails); 2707 if (os_snprintf_error(buflen - len, ret)) 2708 return len; 2709 len += ret; 2710 2711 /* dot1xAuthSessionStatsTable */ 2712 os_reltime_age(&sta->acct_session_start, &diff); 2713 if (sm->eap && !sm->identity) { 2714 const u8 *id; 2715 size_t id_len; 2716 2717 id = eap_get_identity(sm->eap, &id_len); 2718 if (id) 2719 identity_buf = dup_binstr(id, id_len); 2720 } 2721 ret = os_snprintf(buf + len, buflen - len, 2722 /* TODO: dot1xAuthSessionOctetsRx */ 2723 /* TODO: dot1xAuthSessionOctetsTx */ 2724 /* TODO: dot1xAuthSessionFramesRx */ 2725 /* TODO: dot1xAuthSessionFramesTx */ 2726 "dot1xAuthSessionId=%016llX\n" 2727 "dot1xAuthSessionAuthenticMethod=%d\n" 2728 "dot1xAuthSessionTime=%u\n" 2729 "dot1xAuthSessionTerminateCause=999\n" 2730 "dot1xAuthSessionUserName=%s\n", 2731 (unsigned long long) sta->acct_session_id, 2732 (wpa_key_mgmt_wpa_ieee8021x( 2733 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ? 2734 1 : 2, 2735 (unsigned int) diff.sec, 2736 sm->identity ? (char *) sm->identity : 2737 (identity_buf ? identity_buf : "N/A")); 2738 os_free(identity_buf); 2739 if (os_snprintf_error(buflen - len, ret)) 2740 return len; 2741 len += ret; 2742 2743 if (sm->acct_multi_session_id) { 2744 ret = os_snprintf(buf + len, buflen - len, 2745 "authMultiSessionId=%016llX\n", 2746 (unsigned long long) 2747 sm->acct_multi_session_id); 2748 if (os_snprintf_error(buflen - len, ret)) 2749 return len; 2750 len += ret; 2751 } 2752 2753 name1 = eap_server_get_name(0, sm->eap_type_authsrv); 2754 name2 = eap_server_get_name(0, sm->eap_type_supp); 2755 ret = os_snprintf(buf + len, buflen - len, 2756 "last_eap_type_as=%d (%s)\n" 2757 "last_eap_type_sta=%d (%s)\n", 2758 sm->eap_type_authsrv, name1, 2759 sm->eap_type_supp, name2); 2760 if (os_snprintf_error(buflen - len, ret)) 2761 return len; 2762 len += ret; 2763 2764 return len; 2765 } 2766 2767 2768 #ifdef CONFIG_HS20 2769 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx) 2770 { 2771 struct hostapd_data *hapd = eloop_ctx; 2772 struct sta_info *sta = timeout_ctx; 2773 2774 if (sta->remediation) { 2775 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2776 MACSTR " to indicate Subscription Remediation", 2777 MAC2STR(sta->addr)); 2778 hs20_send_wnm_notification(hapd, sta->addr, 2779 sta->remediation_method, 2780 sta->remediation_url); 2781 os_free(sta->remediation_url); 2782 sta->remediation_url = NULL; 2783 } 2784 2785 if (sta->hs20_deauth_req) { 2786 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2787 MACSTR " to indicate imminent deauthentication", 2788 MAC2STR(sta->addr)); 2789 hs20_send_wnm_notification_deauth_req(hapd, sta->addr, 2790 sta->hs20_deauth_req); 2791 } 2792 2793 if (sta->hs20_t_c_filtering) { 2794 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2795 MACSTR " to indicate Terms and Conditions filtering", 2796 MAC2STR(sta->addr)); 2797 hs20_send_wnm_notification_t_c(hapd, sta->addr, sta->t_c_url); 2798 os_free(sta->t_c_url); 2799 sta->t_c_url = NULL; 2800 } 2801 } 2802 #endif /* CONFIG_HS20 */ 2803 2804 2805 static void ieee802_1x_finished(struct hostapd_data *hapd, 2806 struct sta_info *sta, int success, 2807 int remediation) 2808 { 2809 const u8 *key; 2810 size_t len; 2811 /* TODO: get PMKLifetime from WPA parameters */ 2812 static const int dot11RSNAConfigPMKLifetime = 43200; 2813 unsigned int session_timeout; 2814 struct os_reltime now, remaining; 2815 2816 #ifdef CONFIG_HS20 2817 if (remediation && !sta->remediation) { 2818 sta->remediation = 1; 2819 os_free(sta->remediation_url); 2820 sta->remediation_url = 2821 os_strdup(hapd->conf->subscr_remediation_url); 2822 sta->remediation_method = 1; /* SOAP-XML SPP */ 2823 } 2824 2825 if (success && (sta->remediation || sta->hs20_deauth_req || 2826 sta->hs20_t_c_filtering)) { 2827 wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to " 2828 MACSTR " in 100 ms", MAC2STR(sta->addr)); 2829 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta); 2830 eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send, 2831 hapd, sta); 2832 } 2833 #endif /* CONFIG_HS20 */ 2834 2835 key = ieee802_1x_get_key(sta->eapol_sm, &len); 2836 if (sta->session_timeout_set) { 2837 os_get_reltime(&now); 2838 os_reltime_sub(&sta->session_timeout, &now, &remaining); 2839 session_timeout = (remaining.sec > 0) ? remaining.sec : 1; 2840 } else { 2841 session_timeout = dot11RSNAConfigPMKLifetime; 2842 } 2843 if (success && key && len >= PMK_LEN && !sta->remediation && 2844 !sta->hs20_deauth_requested && 2845 wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout, 2846 sta->eapol_sm) == 0) { 2847 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 2848 HOSTAPD_LEVEL_DEBUG, 2849 "Added PMKSA cache entry (IEEE 802.1X)"); 2850 } 2851 2852 if (!success) { 2853 /* 2854 * Many devices require deauthentication after WPS provisioning 2855 * and some may not be be able to do that themselves, so 2856 * disconnect the client here. In addition, this may also 2857 * benefit IEEE 802.1X/EAPOL authentication cases, too since 2858 * the EAPOL PAE state machine would remain in HELD state for 2859 * considerable amount of time and some EAP methods, like 2860 * EAP-FAST with anonymous provisioning, may require another 2861 * EAPOL authentication to be started to complete connection. 2862 */ 2863 ap_sta_delayed_1x_auth_fail_disconnect(hapd, sta); 2864 } 2865 } 2866
