1 /* 2 * hostapd / IEEE 802.1X-2004 Authenticator 3 * Copyright (c) 2002-2012, 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 = 1; /* Release 2 */ 686 if (!radius_msg_add_wfa( 687 msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION, 688 &ver, 1)) { 689 wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP " 690 "version"); 691 goto fail; 692 } 693 694 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) { 695 const u8 *pos; 696 u8 buf[3]; 697 u16 id; 698 pos = wpabuf_head_u8(sta->hs20_ie); 699 buf[0] = (*pos) >> 4; 700 if (((*pos) & HS20_PPS_MO_ID_PRESENT) && 701 wpabuf_len(sta->hs20_ie) >= 3) 702 id = WPA_GET_LE16(pos + 1); 703 else 704 id = 0; 705 WPA_PUT_BE16(buf + 1, id); 706 if (!radius_msg_add_wfa( 707 msg, 708 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION, 709 buf, sizeof(buf))) { 710 wpa_printf(MSG_ERROR, "Could not add HS 2.0 " 711 "STA version"); 712 goto fail; 713 } 714 } 715 } 716 #endif /* CONFIG_HS20 */ 717 718 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0) 719 goto fail; 720 721 return; 722 723 fail: 724 radius_msg_free(msg); 725 } 726 #endif /* CONFIG_NO_RADIUS */ 727 728 729 static void handle_eap_response(struct hostapd_data *hapd, 730 struct sta_info *sta, struct eap_hdr *eap, 731 size_t len) 732 { 733 u8 type, *data; 734 struct eapol_state_machine *sm = sta->eapol_sm; 735 if (sm == NULL) 736 return; 737 738 data = (u8 *) (eap + 1); 739 740 if (len < sizeof(*eap) + 1) { 741 wpa_printf(MSG_INFO, "handle_eap_response: too short response data"); 742 return; 743 } 744 745 sm->eap_type_supp = type = data[0]; 746 747 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 748 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " 749 "id=%d len=%d) from STA: EAP Response-%s (%d)", 750 eap->code, eap->identifier, be_to_host16(eap->length), 751 eap_server_get_name(0, type), type); 752 753 sm->dot1xAuthEapolRespFramesRx++; 754 755 wpabuf_free(sm->eap_if->eapRespData); 756 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); 757 sm->eapolEap = TRUE; 758 } 759 760 761 static void handle_eap_initiate(struct hostapd_data *hapd, 762 struct sta_info *sta, struct eap_hdr *eap, 763 size_t len) 764 { 765 #ifdef CONFIG_ERP 766 u8 type, *data; 767 struct eapol_state_machine *sm = sta->eapol_sm; 768 769 if (sm == NULL) 770 return; 771 772 if (len < sizeof(*eap) + 1) { 773 wpa_printf(MSG_INFO, 774 "handle_eap_initiate: too short response data"); 775 return; 776 } 777 778 data = (u8 *) (eap + 1); 779 type = data[0]; 780 781 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 782 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " 783 "id=%d len=%d) from STA: EAP Initiate type %u", 784 eap->code, eap->identifier, be_to_host16(eap->length), 785 type); 786 787 wpabuf_free(sm->eap_if->eapRespData); 788 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); 789 sm->eapolEap = TRUE; 790 #endif /* CONFIG_ERP */ 791 } 792 793 794 /* Process incoming EAP packet from Supplicant */ 795 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta, 796 u8 *buf, size_t len) 797 { 798 struct eap_hdr *eap; 799 u16 eap_len; 800 801 if (len < sizeof(*eap)) { 802 wpa_printf(MSG_INFO, " too short EAP packet"); 803 return; 804 } 805 806 eap = (struct eap_hdr *) buf; 807 808 eap_len = be_to_host16(eap->length); 809 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d", 810 eap->code, eap->identifier, eap_len); 811 if (eap_len < sizeof(*eap)) { 812 wpa_printf(MSG_DEBUG, " Invalid EAP length"); 813 return; 814 } else if (eap_len > len) { 815 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP " 816 "packet"); 817 return; 818 } else if (eap_len < len) { 819 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP " 820 "packet", (unsigned long) len - eap_len); 821 } 822 823 switch (eap->code) { 824 case EAP_CODE_REQUEST: 825 wpa_printf(MSG_DEBUG, " (request)"); 826 return; 827 case EAP_CODE_RESPONSE: 828 wpa_printf(MSG_DEBUG, " (response)"); 829 handle_eap_response(hapd, sta, eap, eap_len); 830 break; 831 case EAP_CODE_SUCCESS: 832 wpa_printf(MSG_DEBUG, " (success)"); 833 return; 834 case EAP_CODE_FAILURE: 835 wpa_printf(MSG_DEBUG, " (failure)"); 836 return; 837 case EAP_CODE_INITIATE: 838 wpa_printf(MSG_DEBUG, " (initiate)"); 839 handle_eap_initiate(hapd, sta, eap, eap_len); 840 break; 841 case EAP_CODE_FINISH: 842 wpa_printf(MSG_DEBUG, " (finish)"); 843 break; 844 default: 845 wpa_printf(MSG_DEBUG, " (unknown code)"); 846 return; 847 } 848 } 849 850 851 struct eapol_state_machine * 852 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta) 853 { 854 int flags = 0; 855 if (sta->flags & WLAN_STA_PREAUTH) 856 flags |= EAPOL_SM_PREAUTH; 857 if (sta->wpa_sm) { 858 flags |= EAPOL_SM_USES_WPA; 859 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) 860 flags |= EAPOL_SM_FROM_PMKSA_CACHE; 861 } 862 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags, 863 sta->wps_ie, sta->p2p_ie, sta, 864 sta->identity, sta->radius_cui); 865 } 866 867 868 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf, 869 size_t len) 870 { 871 if (sta->pending_eapol_rx) { 872 wpabuf_free(sta->pending_eapol_rx->buf); 873 } else { 874 sta->pending_eapol_rx = 875 os_malloc(sizeof(*sta->pending_eapol_rx)); 876 if (!sta->pending_eapol_rx) 877 return; 878 } 879 880 sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len); 881 if (!sta->pending_eapol_rx->buf) { 882 os_free(sta->pending_eapol_rx); 883 sta->pending_eapol_rx = NULL; 884 return; 885 } 886 887 os_get_reltime(&sta->pending_eapol_rx->rx_time); 888 } 889 890 891 /** 892 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant 893 * @hapd: hostapd BSS data 894 * @sa: Source address (sender of the EAPOL frame) 895 * @buf: EAPOL frame 896 * @len: Length of buf in octets 897 * 898 * This function is called for each incoming EAPOL frame from the interface 899 */ 900 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf, 901 size_t len) 902 { 903 struct sta_info *sta; 904 struct ieee802_1x_hdr *hdr; 905 struct ieee802_1x_eapol_key *key; 906 u16 datalen; 907 struct rsn_pmksa_cache_entry *pmksa; 908 int key_mgmt; 909 910 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen && 911 !hapd->conf->wps_state) 912 return; 913 914 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR, 915 (unsigned long) len, MAC2STR(sa)); 916 sta = ap_get_sta(hapd, sa); 917 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) && 918 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) { 919 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not " 920 "associated/Pre-authenticating STA"); 921 922 if (sta && (sta->flags & WLAN_STA_AUTH)) { 923 wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR 924 " for later use", MAC2STR(sta->addr)); 925 ieee802_1x_save_eapol(sta, buf, len); 926 } 927 928 return; 929 } 930 931 if (len < sizeof(*hdr)) { 932 wpa_printf(MSG_INFO, " too short IEEE 802.1X packet"); 933 return; 934 } 935 936 hdr = (struct ieee802_1x_hdr *) buf; 937 datalen = be_to_host16(hdr->length); 938 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d", 939 hdr->version, hdr->type, datalen); 940 941 if (len - sizeof(*hdr) < datalen) { 942 wpa_printf(MSG_INFO, " frame too short for this IEEE 802.1X packet"); 943 if (sta->eapol_sm) 944 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++; 945 return; 946 } 947 if (len - sizeof(*hdr) > datalen) { 948 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after " 949 "IEEE 802.1X packet", 950 (unsigned long) len - sizeof(*hdr) - datalen); 951 } 952 953 if (sta->eapol_sm) { 954 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version; 955 sta->eapol_sm->dot1xAuthEapolFramesRx++; 956 } 957 958 key = (struct ieee802_1x_eapol_key *) (hdr + 1); 959 if (datalen >= sizeof(struct ieee802_1x_eapol_key) && 960 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY && 961 (key->type == EAPOL_KEY_TYPE_WPA || 962 key->type == EAPOL_KEY_TYPE_RSN)) { 963 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr, 964 sizeof(*hdr) + datalen); 965 return; 966 } 967 968 if (!hapd->conf->ieee802_1x && !hapd->conf->osen && 969 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) { 970 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 971 "802.1X not enabled and WPS not used"); 972 return; 973 } 974 975 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 976 if (key_mgmt != -1 && 977 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE || 978 key_mgmt == WPA_KEY_MGMT_DPP)) { 979 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 980 "STA is using PSK"); 981 return; 982 } 983 984 if (!sta->eapol_sm) { 985 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 986 if (!sta->eapol_sm) 987 return; 988 989 #ifdef CONFIG_WPS 990 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) { 991 u32 wflags = sta->flags & (WLAN_STA_WPS | 992 WLAN_STA_WPS2 | 993 WLAN_STA_MAYBE_WPS); 994 if (wflags == WLAN_STA_MAYBE_WPS || 995 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) { 996 /* 997 * Delay EAPOL frame transmission until a 998 * possible WPS STA initiates the handshake 999 * with EAPOL-Start. Only allow the wait to be 1000 * skipped if the STA is known to support WPS 1001 * 2.0. 1002 */ 1003 wpa_printf(MSG_DEBUG, "WPS: Do not start " 1004 "EAPOL until EAPOL-Start is " 1005 "received"); 1006 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 1007 } 1008 } 1009 #endif /* CONFIG_WPS */ 1010 1011 sta->eapol_sm->eap_if->portEnabled = TRUE; 1012 } 1013 1014 /* since we support version 1, we can ignore version field and proceed 1015 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */ 1016 /* TODO: actually, we are not version 1 anymore.. However, Version 2 1017 * does not change frame contents, so should be ok to process frames 1018 * more or less identically. Some changes might be needed for 1019 * verification of fields. */ 1020 1021 switch (hdr->type) { 1022 case IEEE802_1X_TYPE_EAP_PACKET: 1023 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen); 1024 break; 1025 1026 case IEEE802_1X_TYPE_EAPOL_START: 1027 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1028 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start " 1029 "from STA"); 1030 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 1031 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 1032 if (pmksa) { 1033 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 1034 HOSTAPD_LEVEL_DEBUG, "cached PMKSA " 1035 "available - ignore it since " 1036 "STA sent EAPOL-Start"); 1037 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa); 1038 } 1039 sta->eapol_sm->eapolStart = TRUE; 1040 sta->eapol_sm->dot1xAuthEapolStartFramesRx++; 1041 eap_server_clear_identity(sta->eapol_sm->eap); 1042 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 1043 break; 1044 1045 case IEEE802_1X_TYPE_EAPOL_LOGOFF: 1046 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1047 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff " 1048 "from STA"); 1049 sta->acct_terminate_cause = 1050 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1051 accounting_sta_stop(hapd, sta); 1052 sta->eapol_sm->eapolLogoff = TRUE; 1053 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++; 1054 eap_server_clear_identity(sta->eapol_sm->eap); 1055 break; 1056 1057 case IEEE802_1X_TYPE_EAPOL_KEY: 1058 wpa_printf(MSG_DEBUG, " EAPOL-Key"); 1059 if (!ap_sta_is_authorized(sta)) { 1060 wpa_printf(MSG_DEBUG, " Dropped key data from " 1061 "unauthorized Supplicant"); 1062 break; 1063 } 1064 break; 1065 1066 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT: 1067 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert"); 1068 /* TODO: implement support for this; show data */ 1069 break; 1070 1071 default: 1072 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type"); 1073 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++; 1074 break; 1075 } 1076 1077 eapol_auth_step(sta->eapol_sm); 1078 } 1079 1080 1081 /** 1082 * ieee802_1x_new_station - Start IEEE 802.1X authentication 1083 * @hapd: hostapd BSS data 1084 * @sta: The station 1085 * 1086 * This function is called to start IEEE 802.1X authentication when a new 1087 * station completes IEEE 802.11 association. 1088 */ 1089 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta) 1090 { 1091 struct rsn_pmksa_cache_entry *pmksa; 1092 int reassoc = 1; 1093 int force_1x = 0; 1094 int key_mgmt; 1095 1096 #ifdef CONFIG_WPS 1097 if (hapd->conf->wps_state && 1098 ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) || 1099 (sta->flags & WLAN_STA_WPS))) { 1100 /* 1101 * Need to enable IEEE 802.1X/EAPOL state machines for possible 1102 * WPS handshake even if IEEE 802.1X/EAPOL is not used for 1103 * authentication in this BSS. 1104 */ 1105 force_1x = 1; 1106 } 1107 #endif /* CONFIG_WPS */ 1108 1109 if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) { 1110 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - " 1111 "802.1X not enabled or forced for WPS"); 1112 /* 1113 * Clear any possible EAPOL authenticator state to support 1114 * reassociation change from WPS to PSK. 1115 */ 1116 ieee802_1x_free_station(hapd, sta); 1117 return; 1118 } 1119 1120 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 1121 if (key_mgmt != -1 && 1122 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE || 1123 key_mgmt == WPA_KEY_MGMT_DPP)) { 1124 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK"); 1125 /* 1126 * Clear any possible EAPOL authenticator state to support 1127 * reassociation change from WPA-EAP to PSK. 1128 */ 1129 ieee802_1x_free_station(hapd, sta); 1130 return; 1131 } 1132 1133 if (sta->eapol_sm == NULL) { 1134 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1135 HOSTAPD_LEVEL_DEBUG, "start authentication"); 1136 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 1137 if (sta->eapol_sm == NULL) { 1138 hostapd_logger(hapd, sta->addr, 1139 HOSTAPD_MODULE_IEEE8021X, 1140 HOSTAPD_LEVEL_INFO, 1141 "failed to allocate state machine"); 1142 return; 1143 } 1144 reassoc = 0; 1145 } 1146 1147 #ifdef CONFIG_WPS 1148 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 1149 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state && 1150 !(sta->flags & WLAN_STA_WPS2)) { 1151 /* 1152 * Delay EAPOL frame transmission until a possible WPS STA 1153 * initiates the handshake with EAPOL-Start. Only allow the 1154 * wait to be skipped if the STA is known to support WPS 2.0. 1155 */ 1156 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until " 1157 "EAPOL-Start is received"); 1158 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 1159 } 1160 #endif /* CONFIG_WPS */ 1161 1162 sta->eapol_sm->eap_if->portEnabled = TRUE; 1163 1164 #ifdef CONFIG_IEEE80211R_AP 1165 if (sta->auth_alg == WLAN_AUTH_FT) { 1166 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1167 HOSTAPD_LEVEL_DEBUG, 1168 "PMK from FT - skip IEEE 802.1X/EAP"); 1169 /* Setup EAPOL state machines to already authenticated state 1170 * because of existing FT information from R0KH. */ 1171 sta->eapol_sm->keyRun = TRUE; 1172 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1173 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1174 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1175 sta->eapol_sm->authSuccess = TRUE; 1176 sta->eapol_sm->authFail = FALSE; 1177 sta->eapol_sm->portValid = TRUE; 1178 if (sta->eapol_sm->eap) 1179 eap_sm_notify_cached(sta->eapol_sm->eap); 1180 /* TODO: get vlan_id from R0KH using RRB message */ 1181 return; 1182 } 1183 #endif /* CONFIG_IEEE80211R_AP */ 1184 1185 #ifdef CONFIG_FILS 1186 if (sta->auth_alg == WLAN_AUTH_FILS_SK || 1187 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || 1188 sta->auth_alg == WLAN_AUTH_FILS_PK) { 1189 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1190 HOSTAPD_LEVEL_DEBUG, 1191 "PMK from FILS - skip IEEE 802.1X/EAP"); 1192 /* Setup EAPOL state machines to already authenticated state 1193 * because of existing FILS information. */ 1194 sta->eapol_sm->keyRun = TRUE; 1195 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1196 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1197 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1198 sta->eapol_sm->authSuccess = TRUE; 1199 sta->eapol_sm->authFail = FALSE; 1200 sta->eapol_sm->portValid = TRUE; 1201 if (sta->eapol_sm->eap) 1202 eap_sm_notify_cached(sta->eapol_sm->eap); 1203 return; 1204 } 1205 #endif /* CONFIG_FILS */ 1206 1207 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 1208 if (pmksa) { 1209 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1210 HOSTAPD_LEVEL_DEBUG, 1211 "PMK from PMKSA cache - skip IEEE 802.1X/EAP"); 1212 /* Setup EAPOL state machines to already authenticated state 1213 * because of existing PMKSA information in the cache. */ 1214 sta->eapol_sm->keyRun = TRUE; 1215 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1216 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1217 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1218 sta->eapol_sm->authSuccess = TRUE; 1219 sta->eapol_sm->authFail = FALSE; 1220 if (sta->eapol_sm->eap) 1221 eap_sm_notify_cached(sta->eapol_sm->eap); 1222 pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm); 1223 ap_sta_bind_vlan(hapd, sta); 1224 } else { 1225 if (reassoc) { 1226 /* 1227 * Force EAPOL state machines to start 1228 * re-authentication without having to wait for the 1229 * Supplicant to send EAPOL-Start. 1230 */ 1231 sta->eapol_sm->reAuthenticate = TRUE; 1232 } 1233 eapol_auth_step(sta->eapol_sm); 1234 } 1235 } 1236 1237 1238 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta) 1239 { 1240 struct eapol_state_machine *sm = sta->eapol_sm; 1241 1242 #ifdef CONFIG_HS20 1243 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta); 1244 #endif /* CONFIG_HS20 */ 1245 1246 if (sta->pending_eapol_rx) { 1247 wpabuf_free(sta->pending_eapol_rx->buf); 1248 os_free(sta->pending_eapol_rx); 1249 sta->pending_eapol_rx = NULL; 1250 } 1251 1252 if (sm == NULL) 1253 return; 1254 1255 sta->eapol_sm = NULL; 1256 1257 #ifndef CONFIG_NO_RADIUS 1258 radius_msg_free(sm->last_recv_radius); 1259 radius_free_class(&sm->radius_class); 1260 #endif /* CONFIG_NO_RADIUS */ 1261 1262 eapol_auth_free(sm); 1263 } 1264 1265 1266 #ifndef CONFIG_NO_RADIUS 1267 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd, 1268 struct sta_info *sta) 1269 { 1270 struct wpabuf *eap; 1271 const struct eap_hdr *hdr; 1272 int eap_type = -1; 1273 char buf[64]; 1274 struct radius_msg *msg; 1275 struct eapol_state_machine *sm = sta->eapol_sm; 1276 1277 if (sm == NULL || sm->last_recv_radius == NULL) { 1278 if (sm) 1279 sm->eap_if->aaaEapNoReq = TRUE; 1280 return; 1281 } 1282 1283 msg = sm->last_recv_radius; 1284 1285 eap = radius_msg_get_eap(msg); 1286 if (eap == NULL) { 1287 /* RFC 3579, Chap. 2.6.3: 1288 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message 1289 * attribute */ 1290 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1291 HOSTAPD_LEVEL_WARNING, "could not extract " 1292 "EAP-Message from RADIUS message"); 1293 sm->eap_if->aaaEapNoReq = TRUE; 1294 return; 1295 } 1296 1297 if (wpabuf_len(eap) < sizeof(*hdr)) { 1298 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1299 HOSTAPD_LEVEL_WARNING, "too short EAP packet " 1300 "received from authentication server"); 1301 wpabuf_free(eap); 1302 sm->eap_if->aaaEapNoReq = TRUE; 1303 return; 1304 } 1305 1306 if (wpabuf_len(eap) > sizeof(*hdr)) 1307 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)]; 1308 1309 hdr = wpabuf_head(eap); 1310 switch (hdr->code) { 1311 case EAP_CODE_REQUEST: 1312 if (eap_type >= 0) 1313 sm->eap_type_authsrv = eap_type; 1314 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)", 1315 eap_server_get_name(0, eap_type), eap_type); 1316 break; 1317 case EAP_CODE_RESPONSE: 1318 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)", 1319 eap_server_get_name(0, eap_type), eap_type); 1320 break; 1321 case EAP_CODE_SUCCESS: 1322 os_strlcpy(buf, "EAP Success", sizeof(buf)); 1323 break; 1324 case EAP_CODE_FAILURE: 1325 os_strlcpy(buf, "EAP Failure", sizeof(buf)); 1326 break; 1327 default: 1328 os_strlcpy(buf, "unknown EAP code", sizeof(buf)); 1329 break; 1330 } 1331 buf[sizeof(buf) - 1] = '\0'; 1332 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1333 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d " 1334 "id=%d len=%d) from RADIUS server: %s", 1335 hdr->code, hdr->identifier, be_to_host16(hdr->length), 1336 buf); 1337 sm->eap_if->aaaEapReq = TRUE; 1338 1339 wpabuf_free(sm->eap_if->aaaEapReqData); 1340 sm->eap_if->aaaEapReqData = eap; 1341 } 1342 1343 1344 static void ieee802_1x_get_keys(struct hostapd_data *hapd, 1345 struct sta_info *sta, struct radius_msg *msg, 1346 struct radius_msg *req, 1347 const u8 *shared_secret, 1348 size_t shared_secret_len) 1349 { 1350 struct radius_ms_mppe_keys *keys; 1351 struct eapol_state_machine *sm = sta->eapol_sm; 1352 if (sm == NULL) 1353 return; 1354 1355 keys = radius_msg_get_ms_keys(msg, req, shared_secret, 1356 shared_secret_len); 1357 1358 if (keys && keys->send && keys->recv) { 1359 size_t len = keys->send_len + keys->recv_len; 1360 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key", 1361 keys->send, keys->send_len); 1362 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key", 1363 keys->recv, keys->recv_len); 1364 1365 os_free(sm->eap_if->aaaEapKeyData); 1366 sm->eap_if->aaaEapKeyData = os_malloc(len); 1367 if (sm->eap_if->aaaEapKeyData) { 1368 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv, 1369 keys->recv_len); 1370 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len, 1371 keys->send, keys->send_len); 1372 sm->eap_if->aaaEapKeyDataLen = len; 1373 sm->eap_if->aaaEapKeyAvailable = TRUE; 1374 } 1375 } else { 1376 wpa_printf(MSG_DEBUG, 1377 "MS-MPPE: 1x_get_keys, could not get keys: %p send: %p recv: %p", 1378 keys, keys ? keys->send : NULL, 1379 keys ? keys->recv : NULL); 1380 } 1381 1382 if (keys) { 1383 os_free(keys->send); 1384 os_free(keys->recv); 1385 os_free(keys); 1386 } 1387 } 1388 1389 1390 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd, 1391 struct sta_info *sta, 1392 struct radius_msg *msg) 1393 { 1394 u8 *attr_class; 1395 size_t class_len; 1396 struct eapol_state_machine *sm = sta->eapol_sm; 1397 int count, i; 1398 struct radius_attr_data *nclass; 1399 size_t nclass_count; 1400 1401 if (!hapd->conf->radius->acct_server || hapd->radius == NULL || 1402 sm == NULL) 1403 return; 1404 1405 radius_free_class(&sm->radius_class); 1406 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1); 1407 if (count <= 0) 1408 return; 1409 1410 nclass = os_calloc(count, sizeof(struct radius_attr_data)); 1411 if (nclass == NULL) 1412 return; 1413 1414 nclass_count = 0; 1415 1416 attr_class = NULL; 1417 for (i = 0; i < count; i++) { 1418 do { 1419 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS, 1420 &attr_class, &class_len, 1421 attr_class) < 0) { 1422 i = count; 1423 break; 1424 } 1425 } while (class_len < 1); 1426 1427 nclass[nclass_count].data = os_memdup(attr_class, class_len); 1428 if (nclass[nclass_count].data == NULL) 1429 break; 1430 1431 nclass[nclass_count].len = class_len; 1432 nclass_count++; 1433 } 1434 1435 sm->radius_class.attr = nclass; 1436 sm->radius_class.count = nclass_count; 1437 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class " 1438 "attributes for " MACSTR, 1439 (unsigned long) sm->radius_class.count, 1440 MAC2STR(sta->addr)); 1441 } 1442 1443 1444 /* Update sta->identity based on User-Name attribute in Access-Accept */ 1445 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd, 1446 struct sta_info *sta, 1447 struct radius_msg *msg) 1448 { 1449 u8 *buf, *identity; 1450 size_t len; 1451 struct eapol_state_machine *sm = sta->eapol_sm; 1452 1453 if (sm == NULL) 1454 return; 1455 1456 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len, 1457 NULL) < 0) 1458 return; 1459 1460 identity = (u8 *) dup_binstr(buf, len); 1461 if (identity == NULL) 1462 return; 1463 1464 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1465 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with " 1466 "User-Name from Access-Accept '%s'", 1467 sm->identity ? (char *) sm->identity : "N/A", 1468 (char *) identity); 1469 1470 os_free(sm->identity); 1471 sm->identity = identity; 1472 sm->identity_len = len; 1473 } 1474 1475 1476 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */ 1477 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd, 1478 struct sta_info *sta, 1479 struct radius_msg *msg) 1480 { 1481 struct eapol_state_machine *sm = sta->eapol_sm; 1482 struct wpabuf *cui; 1483 u8 *buf; 1484 size_t len; 1485 1486 if (sm == NULL) 1487 return; 1488 1489 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, 1490 &buf, &len, NULL) < 0) 1491 return; 1492 1493 cui = wpabuf_alloc_copy(buf, len); 1494 if (cui == NULL) 1495 return; 1496 1497 wpabuf_free(sm->radius_cui); 1498 sm->radius_cui = cui; 1499 } 1500 1501 1502 #ifdef CONFIG_HS20 1503 1504 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len) 1505 { 1506 sta->remediation = 1; 1507 os_free(sta->remediation_url); 1508 if (len > 2) { 1509 sta->remediation_url = os_malloc(len); 1510 if (!sta->remediation_url) 1511 return; 1512 sta->remediation_method = pos[0]; 1513 os_memcpy(sta->remediation_url, pos + 1, len - 1); 1514 sta->remediation_url[len - 1] = '\0'; 1515 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " 1516 "for " MACSTR " - server method %u URL %s", 1517 MAC2STR(sta->addr), sta->remediation_method, 1518 sta->remediation_url); 1519 } else { 1520 sta->remediation_url = NULL; 1521 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " 1522 "for " MACSTR, MAC2STR(sta->addr)); 1523 } 1524 /* TODO: assign the STA into remediation VLAN or add filtering */ 1525 } 1526 1527 1528 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd, 1529 struct sta_info *sta, u8 *pos, 1530 size_t len) 1531 { 1532 if (len < 3) 1533 return; /* Malformed information */ 1534 sta->hs20_deauth_requested = 1; 1535 wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u " 1536 "Re-auth Delay %u", 1537 *pos, WPA_GET_LE16(pos + 1)); 1538 wpabuf_free(sta->hs20_deauth_req); 1539 sta->hs20_deauth_req = wpabuf_alloc(len + 1); 1540 if (sta->hs20_deauth_req) { 1541 wpabuf_put_data(sta->hs20_deauth_req, pos, 3); 1542 wpabuf_put_u8(sta->hs20_deauth_req, len - 3); 1543 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3); 1544 } 1545 ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout); 1546 } 1547 1548 1549 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd, 1550 struct sta_info *sta, u8 *pos, 1551 size_t len, int session_timeout) 1552 { 1553 unsigned int swt; 1554 int warning_time, beacon_int; 1555 1556 if (len < 1) 1557 return; /* Malformed information */ 1558 os_free(sta->hs20_session_info_url); 1559 sta->hs20_session_info_url = os_malloc(len); 1560 if (sta->hs20_session_info_url == NULL) 1561 return; 1562 swt = pos[0]; 1563 os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1); 1564 sta->hs20_session_info_url[len - 1] = '\0'; 1565 wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u " 1566 "(session_timeout=%d)", 1567 sta->hs20_session_info_url, swt, session_timeout); 1568 if (session_timeout < 0) { 1569 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL"); 1570 return; 1571 } 1572 if (swt == 255) 1573 swt = 1; /* Use one minute as the AP selected value */ 1574 1575 if ((unsigned int) session_timeout < swt * 60) 1576 warning_time = 0; 1577 else 1578 warning_time = session_timeout - swt * 60; 1579 1580 beacon_int = hapd->iconf->beacon_int; 1581 if (beacon_int < 1) 1582 beacon_int = 100; /* best guess */ 1583 sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128; 1584 if (sta->hs20_disassoc_timer > 65535) 1585 sta->hs20_disassoc_timer = 65535; 1586 1587 ap_sta_session_warning_timeout(hapd, sta, warning_time); 1588 } 1589 1590 #endif /* CONFIG_HS20 */ 1591 1592 1593 static void ieee802_1x_check_hs20(struct hostapd_data *hapd, 1594 struct sta_info *sta, 1595 struct radius_msg *msg, 1596 int session_timeout) 1597 { 1598 #ifdef CONFIG_HS20 1599 u8 *buf, *pos, *end, type, sublen; 1600 size_t len; 1601 1602 buf = NULL; 1603 sta->remediation = 0; 1604 sta->hs20_deauth_requested = 0; 1605 1606 for (;;) { 1607 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC, 1608 &buf, &len, buf) < 0) 1609 break; 1610 if (len < 6) 1611 continue; 1612 pos = buf; 1613 end = buf + len; 1614 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) 1615 continue; 1616 pos += 4; 1617 1618 type = *pos++; 1619 sublen = *pos++; 1620 if (sublen < 2) 1621 continue; /* invalid length */ 1622 sublen -= 2; /* skip header */ 1623 if (pos + sublen > end) 1624 continue; /* invalid WFA VSA */ 1625 1626 switch (type) { 1627 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION: 1628 ieee802_1x_hs20_sub_rem(sta, pos, sublen); 1629 break; 1630 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ: 1631 ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen); 1632 break; 1633 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL: 1634 ieee802_1x_hs20_session_info(hapd, sta, pos, sublen, 1635 session_timeout); 1636 break; 1637 } 1638 } 1639 #endif /* CONFIG_HS20 */ 1640 } 1641 1642 1643 struct sta_id_search { 1644 u8 identifier; 1645 struct eapol_state_machine *sm; 1646 }; 1647 1648 1649 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd, 1650 struct sta_info *sta, 1651 void *ctx) 1652 { 1653 struct sta_id_search *id_search = ctx; 1654 struct eapol_state_machine *sm = sta->eapol_sm; 1655 1656 if (sm && sm->radius_identifier >= 0 && 1657 sm->radius_identifier == id_search->identifier) { 1658 id_search->sm = sm; 1659 return 1; 1660 } 1661 return 0; 1662 } 1663 1664 1665 static struct eapol_state_machine * 1666 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier) 1667 { 1668 struct sta_id_search id_search; 1669 id_search.identifier = identifier; 1670 id_search.sm = NULL; 1671 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search); 1672 return id_search.sm; 1673 } 1674 1675 1676 /** 1677 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server 1678 * @msg: RADIUS response message 1679 * @req: RADIUS request message 1680 * @shared_secret: RADIUS shared secret 1681 * @shared_secret_len: Length of shared_secret in octets 1682 * @data: Context data (struct hostapd_data *) 1683 * Returns: Processing status 1684 */ 1685 static RadiusRxResult 1686 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req, 1687 const u8 *shared_secret, size_t shared_secret_len, 1688 void *data) 1689 { 1690 struct hostapd_data *hapd = data; 1691 struct sta_info *sta; 1692 u32 session_timeout = 0, termination_action, acct_interim_interval; 1693 int session_timeout_set; 1694 struct eapol_state_machine *sm; 1695 int override_eapReq = 0; 1696 struct radius_hdr *hdr = radius_msg_get_hdr(msg); 1697 struct vlan_description vlan_desc; 1698 #ifndef CONFIG_NO_VLAN 1699 int *untagged, *tagged, *notempty; 1700 #endif /* CONFIG_NO_VLAN */ 1701 1702 os_memset(&vlan_desc, 0, sizeof(vlan_desc)); 1703 1704 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier); 1705 if (sm == NULL) { 1706 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching " 1707 "station for this RADIUS message"); 1708 return RADIUS_RX_UNKNOWN; 1709 } 1710 sta = sm->sta; 1711 1712 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be 1713 * present when packet contains an EAP-Message attribute */ 1714 if (hdr->code == RADIUS_CODE_ACCESS_REJECT && 1715 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL, 1716 0) < 0 && 1717 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) { 1718 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without " 1719 "Message-Authenticator since it does not include " 1720 "EAP-Message"); 1721 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len, 1722 req, 1)) { 1723 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped"); 1724 return RADIUS_RX_INVALID_AUTHENTICATOR; 1725 } 1726 1727 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT && 1728 hdr->code != RADIUS_CODE_ACCESS_REJECT && 1729 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) { 1730 wpa_printf(MSG_INFO, "Unknown RADIUS message code"); 1731 return RADIUS_RX_UNKNOWN; 1732 } 1733 1734 sm->radius_identifier = -1; 1735 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR, 1736 MAC2STR(sta->addr)); 1737 1738 radius_msg_free(sm->last_recv_radius); 1739 sm->last_recv_radius = msg; 1740 1741 session_timeout_set = 1742 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT, 1743 &session_timeout); 1744 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION, 1745 &termination_action)) 1746 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT; 1747 1748 if (hapd->conf->acct_interim_interval == 0 && 1749 hdr->code == RADIUS_CODE_ACCESS_ACCEPT && 1750 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL, 1751 &acct_interim_interval) == 0) { 1752 if (acct_interim_interval < 60) { 1753 hostapd_logger(hapd, sta->addr, 1754 HOSTAPD_MODULE_IEEE8021X, 1755 HOSTAPD_LEVEL_INFO, 1756 "ignored too small " 1757 "Acct-Interim-Interval %d", 1758 acct_interim_interval); 1759 } else 1760 sta->acct_interim_interval = acct_interim_interval; 1761 } 1762 1763 1764 switch (hdr->code) { 1765 case RADIUS_CODE_ACCESS_ACCEPT: 1766 #ifndef CONFIG_NO_VLAN 1767 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED) { 1768 notempty = &vlan_desc.notempty; 1769 untagged = &vlan_desc.untagged; 1770 tagged = vlan_desc.tagged; 1771 *notempty = !!radius_msg_get_vlanid(msg, untagged, 1772 MAX_NUM_TAGGED_VLAN, 1773 tagged); 1774 } 1775 1776 if (vlan_desc.notempty && 1777 !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) { 1778 sta->eapol_sm->authFail = TRUE; 1779 hostapd_logger(hapd, sta->addr, 1780 HOSTAPD_MODULE_RADIUS, 1781 HOSTAPD_LEVEL_INFO, 1782 "Invalid VLAN %d%s received from RADIUS server", 1783 vlan_desc.untagged, 1784 vlan_desc.tagged[0] ? "+" : ""); 1785 os_memset(&vlan_desc, 0, sizeof(vlan_desc)); 1786 ap_sta_set_vlan(hapd, sta, &vlan_desc); 1787 break; 1788 } 1789 1790 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED && 1791 !vlan_desc.notempty) { 1792 sta->eapol_sm->authFail = TRUE; 1793 hostapd_logger(hapd, sta->addr, 1794 HOSTAPD_MODULE_IEEE8021X, 1795 HOSTAPD_LEVEL_INFO, "authentication " 1796 "server did not include required VLAN " 1797 "ID in Access-Accept"); 1798 break; 1799 } 1800 #endif /* CONFIG_NO_VLAN */ 1801 1802 if (ap_sta_set_vlan(hapd, sta, &vlan_desc) < 0) 1803 break; 1804 1805 #ifndef CONFIG_NO_VLAN 1806 if (sta->vlan_id > 0) { 1807 hostapd_logger(hapd, sta->addr, 1808 HOSTAPD_MODULE_RADIUS, 1809 HOSTAPD_LEVEL_INFO, 1810 "VLAN ID %d", sta->vlan_id); 1811 } 1812 #endif /* CONFIG_NO_VLAN */ 1813 1814 if ((sta->flags & WLAN_STA_ASSOC) && 1815 ap_sta_bind_vlan(hapd, sta) < 0) 1816 break; 1817 1818 sta->session_timeout_set = !!session_timeout_set; 1819 sta->session_timeout = session_timeout; 1820 1821 /* RFC 3580, Ch. 3.17 */ 1822 if (session_timeout_set && termination_action == 1823 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) { 1824 sm->reAuthPeriod = session_timeout; 1825 } else if (session_timeout_set) 1826 ap_sta_session_timeout(hapd, sta, session_timeout); 1827 1828 sm->eap_if->aaaSuccess = TRUE; 1829 override_eapReq = 1; 1830 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret, 1831 shared_secret_len); 1832 ieee802_1x_store_radius_class(hapd, sta, msg); 1833 ieee802_1x_update_sta_identity(hapd, sta, msg); 1834 ieee802_1x_update_sta_cui(hapd, sta, msg); 1835 ieee802_1x_check_hs20(hapd, sta, msg, 1836 session_timeout_set ? 1837 (int) session_timeout : -1); 1838 break; 1839 case RADIUS_CODE_ACCESS_REJECT: 1840 sm->eap_if->aaaFail = TRUE; 1841 override_eapReq = 1; 1842 break; 1843 case RADIUS_CODE_ACCESS_CHALLENGE: 1844 sm->eap_if->aaaEapReq = TRUE; 1845 if (session_timeout_set) { 1846 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */ 1847 sm->eap_if->aaaMethodTimeout = session_timeout; 1848 hostapd_logger(hapd, sm->addr, 1849 HOSTAPD_MODULE_IEEE8021X, 1850 HOSTAPD_LEVEL_DEBUG, 1851 "using EAP timeout of %d seconds (from " 1852 "RADIUS)", 1853 sm->eap_if->aaaMethodTimeout); 1854 } else { 1855 /* 1856 * Use dynamic retransmission behavior per EAP 1857 * specification. 1858 */ 1859 sm->eap_if->aaaMethodTimeout = 0; 1860 } 1861 break; 1862 } 1863 1864 ieee802_1x_decapsulate_radius(hapd, sta); 1865 if (override_eapReq) 1866 sm->eap_if->aaaEapReq = FALSE; 1867 1868 #ifdef CONFIG_FILS 1869 #ifdef NEED_AP_MLME 1870 if (sta->flags & WLAN_STA_PENDING_FILS_ERP) { 1871 /* TODO: Add a PMKSA entry on success? */ 1872 ieee802_11_finish_fils_auth( 1873 hapd, sta, hdr->code == RADIUS_CODE_ACCESS_ACCEPT, 1874 sm->eap_if->aaaEapReqData, 1875 sm->eap_if->aaaEapKeyData, 1876 sm->eap_if->aaaEapKeyDataLen); 1877 } 1878 #endif /* NEED_AP_MLME */ 1879 #endif /* CONFIG_FILS */ 1880 1881 eapol_auth_step(sm); 1882 1883 return RADIUS_RX_QUEUED; 1884 } 1885 #endif /* CONFIG_NO_RADIUS */ 1886 1887 1888 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta) 1889 { 1890 struct eapol_state_machine *sm = sta->eapol_sm; 1891 if (sm == NULL) 1892 return; 1893 1894 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1895 HOSTAPD_LEVEL_DEBUG, "aborting authentication"); 1896 1897 #ifndef CONFIG_NO_RADIUS 1898 radius_msg_free(sm->last_recv_radius); 1899 sm->last_recv_radius = NULL; 1900 #endif /* CONFIG_NO_RADIUS */ 1901 1902 if (sm->eap_if->eapTimeout) { 1903 /* 1904 * Disconnect the STA since it did not reply to the last EAP 1905 * request and we cannot continue EAP processing (EAP-Failure 1906 * could only be sent if the EAP peer actually replied). 1907 */ 1908 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR, 1909 MAC2STR(sta->addr)); 1910 1911 sm->eap_if->portEnabled = FALSE; 1912 ap_sta_disconnect(hapd, sta, sta->addr, 1913 WLAN_REASON_PREV_AUTH_NOT_VALID); 1914 } 1915 } 1916 1917 1918 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd) 1919 { 1920 struct eapol_authenticator *eapol = hapd->eapol_auth; 1921 1922 if (hapd->conf->default_wep_key_len < 1) 1923 return 0; 1924 1925 os_free(eapol->default_wep_key); 1926 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len); 1927 if (eapol->default_wep_key == NULL || 1928 random_get_bytes(eapol->default_wep_key, 1929 hapd->conf->default_wep_key_len)) { 1930 wpa_printf(MSG_INFO, "Could not generate random WEP key"); 1931 os_free(eapol->default_wep_key); 1932 eapol->default_wep_key = NULL; 1933 return -1; 1934 } 1935 1936 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key", 1937 eapol->default_wep_key, 1938 hapd->conf->default_wep_key_len); 1939 1940 return 0; 1941 } 1942 1943 1944 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd, 1945 struct sta_info *sta, void *ctx) 1946 { 1947 if (sta->eapol_sm) { 1948 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1949 eapol_auth_step(sta->eapol_sm); 1950 } 1951 return 0; 1952 } 1953 1954 1955 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx) 1956 { 1957 struct hostapd_data *hapd = eloop_ctx; 1958 struct eapol_authenticator *eapol = hapd->eapol_auth; 1959 1960 if (eapol->default_wep_key_idx >= 3) 1961 eapol->default_wep_key_idx = 1962 hapd->conf->individual_wep_key_len > 0 ? 1 : 0; 1963 else 1964 eapol->default_wep_key_idx++; 1965 1966 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d", 1967 eapol->default_wep_key_idx); 1968 1969 if (ieee802_1x_rekey_broadcast(hapd)) { 1970 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 1971 HOSTAPD_LEVEL_WARNING, "failed to generate a " 1972 "new broadcast key"); 1973 os_free(eapol->default_wep_key); 1974 eapol->default_wep_key = NULL; 1975 return; 1976 } 1977 1978 /* TODO: Could setup key for RX here, but change default TX keyid only 1979 * after new broadcast key has been sent to all stations. */ 1980 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, 1981 broadcast_ether_addr, 1982 eapol->default_wep_key_idx, 1, NULL, 0, 1983 eapol->default_wep_key, 1984 hapd->conf->default_wep_key_len)) { 1985 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 1986 HOSTAPD_LEVEL_WARNING, "failed to configure a " 1987 "new broadcast key"); 1988 os_free(eapol->default_wep_key); 1989 eapol->default_wep_key = NULL; 1990 return; 1991 } 1992 1993 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL); 1994 1995 if (hapd->conf->wep_rekeying_period > 0) { 1996 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0, 1997 ieee802_1x_rekey, hapd, NULL); 1998 } 1999 } 2000 2001 2002 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type, 2003 const u8 *data, size_t datalen) 2004 { 2005 #ifdef CONFIG_WPS 2006 struct sta_info *sta = sta_ctx; 2007 2008 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) == 2009 WLAN_STA_MAYBE_WPS) { 2010 const u8 *identity; 2011 size_t identity_len; 2012 struct eapol_state_machine *sm = sta->eapol_sm; 2013 2014 identity = eap_get_identity(sm->eap, &identity_len); 2015 if (identity && 2016 ((identity_len == WSC_ID_ENROLLEE_LEN && 2017 os_memcmp(identity, WSC_ID_ENROLLEE, 2018 WSC_ID_ENROLLEE_LEN) == 0) || 2019 (identity_len == WSC_ID_REGISTRAR_LEN && 2020 os_memcmp(identity, WSC_ID_REGISTRAR, 2021 WSC_ID_REGISTRAR_LEN) == 0))) { 2022 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> " 2023 "WLAN_STA_WPS"); 2024 sta->flags |= WLAN_STA_WPS; 2025 } 2026 } 2027 #endif /* CONFIG_WPS */ 2028 2029 ieee802_1x_send(ctx, sta_ctx, type, data, datalen); 2030 } 2031 2032 2033 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx, 2034 const u8 *data, size_t datalen) 2035 { 2036 #ifndef CONFIG_NO_RADIUS 2037 struct hostapd_data *hapd = ctx; 2038 struct sta_info *sta = sta_ctx; 2039 2040 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen); 2041 #endif /* CONFIG_NO_RADIUS */ 2042 } 2043 2044 2045 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success, 2046 int preauth, int remediation) 2047 { 2048 struct hostapd_data *hapd = ctx; 2049 struct sta_info *sta = sta_ctx; 2050 if (preauth) 2051 rsn_preauth_finished(hapd, sta, success); 2052 else 2053 ieee802_1x_finished(hapd, sta, success, remediation); 2054 } 2055 2056 2057 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity, 2058 size_t identity_len, int phase2, 2059 struct eap_user *user) 2060 { 2061 struct hostapd_data *hapd = ctx; 2062 const struct hostapd_eap_user *eap_user; 2063 int i; 2064 int rv = -1; 2065 2066 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2); 2067 if (eap_user == NULL) 2068 goto out; 2069 2070 os_memset(user, 0, sizeof(*user)); 2071 user->phase2 = phase2; 2072 for (i = 0; i < EAP_MAX_METHODS; i++) { 2073 user->methods[i].vendor = eap_user->methods[i].vendor; 2074 user->methods[i].method = eap_user->methods[i].method; 2075 } 2076 2077 if (eap_user->password) { 2078 user->password = os_memdup(eap_user->password, 2079 eap_user->password_len); 2080 if (user->password == NULL) 2081 goto out; 2082 user->password_len = eap_user->password_len; 2083 user->password_hash = eap_user->password_hash; 2084 } 2085 user->force_version = eap_user->force_version; 2086 user->macacl = eap_user->macacl; 2087 user->ttls_auth = eap_user->ttls_auth; 2088 user->remediation = eap_user->remediation; 2089 rv = 0; 2090 2091 out: 2092 if (rv) 2093 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__); 2094 2095 return rv; 2096 } 2097 2098 2099 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr) 2100 { 2101 struct hostapd_data *hapd = ctx; 2102 struct sta_info *sta; 2103 sta = ap_get_sta(hapd, addr); 2104 if (sta == NULL || sta->eapol_sm == NULL) 2105 return 0; 2106 return 1; 2107 } 2108 2109 2110 static void ieee802_1x_logger(void *ctx, const u8 *addr, 2111 eapol_logger_level level, const char *txt) 2112 { 2113 #ifndef CONFIG_NO_HOSTAPD_LOGGER 2114 struct hostapd_data *hapd = ctx; 2115 int hlevel; 2116 2117 switch (level) { 2118 case EAPOL_LOGGER_WARNING: 2119 hlevel = HOSTAPD_LEVEL_WARNING; 2120 break; 2121 case EAPOL_LOGGER_INFO: 2122 hlevel = HOSTAPD_LEVEL_INFO; 2123 break; 2124 case EAPOL_LOGGER_DEBUG: 2125 default: 2126 hlevel = HOSTAPD_LEVEL_DEBUG; 2127 break; 2128 } 2129 2130 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s", 2131 txt); 2132 #endif /* CONFIG_NO_HOSTAPD_LOGGER */ 2133 } 2134 2135 2136 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx, 2137 int authorized) 2138 { 2139 struct hostapd_data *hapd = ctx; 2140 struct sta_info *sta = sta_ctx; 2141 ieee802_1x_set_sta_authorized(hapd, sta, authorized); 2142 } 2143 2144 2145 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx) 2146 { 2147 struct hostapd_data *hapd = ctx; 2148 struct sta_info *sta = sta_ctx; 2149 ieee802_1x_abort_auth(hapd, sta); 2150 } 2151 2152 2153 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx) 2154 { 2155 #ifndef CONFIG_FIPS 2156 #ifndef CONFIG_NO_RC4 2157 struct hostapd_data *hapd = ctx; 2158 struct sta_info *sta = sta_ctx; 2159 ieee802_1x_tx_key(hapd, sta); 2160 #endif /* CONFIG_NO_RC4 */ 2161 #endif /* CONFIG_FIPS */ 2162 } 2163 2164 2165 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx, 2166 enum eapol_event type) 2167 { 2168 /* struct hostapd_data *hapd = ctx; */ 2169 struct sta_info *sta = sta_ctx; 2170 switch (type) { 2171 case EAPOL_AUTH_SM_CHANGE: 2172 wpa_auth_sm_notify(sta->wpa_sm); 2173 break; 2174 case EAPOL_AUTH_REAUTHENTICATE: 2175 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 2176 break; 2177 } 2178 } 2179 2180 2181 #ifdef CONFIG_ERP 2182 2183 static struct eap_server_erp_key * 2184 ieee802_1x_erp_get_key(void *ctx, const char *keyname) 2185 { 2186 struct hostapd_data *hapd = ctx; 2187 struct eap_server_erp_key *erp; 2188 2189 dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key, 2190 list) { 2191 if (os_strcmp(erp->keyname_nai, keyname) == 0) 2192 return erp; 2193 } 2194 2195 return NULL; 2196 } 2197 2198 2199 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp) 2200 { 2201 struct hostapd_data *hapd = ctx; 2202 2203 dl_list_add(&hapd->erp_keys, &erp->list); 2204 return 0; 2205 } 2206 2207 #endif /* CONFIG_ERP */ 2208 2209 2210 int ieee802_1x_init(struct hostapd_data *hapd) 2211 { 2212 int i; 2213 struct eapol_auth_config conf; 2214 struct eapol_auth_cb cb; 2215 2216 dl_list_init(&hapd->erp_keys); 2217 2218 os_memset(&conf, 0, sizeof(conf)); 2219 conf.ctx = hapd; 2220 conf.eap_reauth_period = hapd->conf->eap_reauth_period; 2221 conf.wpa = hapd->conf->wpa; 2222 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len; 2223 conf.eap_server = hapd->conf->eap_server; 2224 conf.ssl_ctx = hapd->ssl_ctx; 2225 conf.msg_ctx = hapd->msg_ctx; 2226 conf.eap_sim_db_priv = hapd->eap_sim_db_priv; 2227 conf.eap_req_id_text = hapd->conf->eap_req_id_text; 2228 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len; 2229 conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start; 2230 conf.erp_domain = hapd->conf->erp_domain; 2231 conf.erp = hapd->conf->eap_server_erp; 2232 conf.tls_session_lifetime = hapd->conf->tls_session_lifetime; 2233 conf.tls_flags = hapd->conf->tls_flags; 2234 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key; 2235 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id; 2236 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len; 2237 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info; 2238 conf.eap_fast_prov = hapd->conf->eap_fast_prov; 2239 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime; 2240 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time; 2241 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind; 2242 conf.tnc = hapd->conf->tnc; 2243 conf.wps = hapd->wps; 2244 conf.fragment_size = hapd->conf->fragment_size; 2245 conf.pwd_group = hapd->conf->pwd_group; 2246 conf.pbc_in_m1 = hapd->conf->pbc_in_m1; 2247 if (hapd->conf->server_id) { 2248 conf.server_id = (const u8 *) hapd->conf->server_id; 2249 conf.server_id_len = os_strlen(hapd->conf->server_id); 2250 } else { 2251 conf.server_id = (const u8 *) "hostapd"; 2252 conf.server_id_len = 7; 2253 } 2254 2255 os_memset(&cb, 0, sizeof(cb)); 2256 cb.eapol_send = ieee802_1x_eapol_send; 2257 cb.aaa_send = ieee802_1x_aaa_send; 2258 cb.finished = _ieee802_1x_finished; 2259 cb.get_eap_user = ieee802_1x_get_eap_user; 2260 cb.sta_entry_alive = ieee802_1x_sta_entry_alive; 2261 cb.logger = ieee802_1x_logger; 2262 cb.set_port_authorized = ieee802_1x_set_port_authorized; 2263 cb.abort_auth = _ieee802_1x_abort_auth; 2264 cb.tx_key = _ieee802_1x_tx_key; 2265 cb.eapol_event = ieee802_1x_eapol_event; 2266 #ifdef CONFIG_ERP 2267 cb.erp_get_key = ieee802_1x_erp_get_key; 2268 cb.erp_add_key = ieee802_1x_erp_add_key; 2269 #endif /* CONFIG_ERP */ 2270 2271 hapd->eapol_auth = eapol_auth_init(&conf, &cb); 2272 if (hapd->eapol_auth == NULL) 2273 return -1; 2274 2275 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) && 2276 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1)) 2277 return -1; 2278 2279 #ifndef CONFIG_NO_RADIUS 2280 if (radius_client_register(hapd->radius, RADIUS_AUTH, 2281 ieee802_1x_receive_auth, hapd)) 2282 return -1; 2283 #endif /* CONFIG_NO_RADIUS */ 2284 2285 if (hapd->conf->default_wep_key_len) { 2286 for (i = 0; i < 4; i++) 2287 hostapd_drv_set_key(hapd->conf->iface, hapd, 2288 WPA_ALG_NONE, NULL, i, 0, NULL, 0, 2289 NULL, 0); 2290 2291 ieee802_1x_rekey(hapd, NULL); 2292 2293 if (hapd->eapol_auth->default_wep_key == NULL) 2294 return -1; 2295 } 2296 2297 return 0; 2298 } 2299 2300 2301 void ieee802_1x_erp_flush(struct hostapd_data *hapd) 2302 { 2303 struct eap_server_erp_key *erp; 2304 2305 while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key, 2306 list)) != NULL) { 2307 dl_list_del(&erp->list); 2308 bin_clear_free(erp, sizeof(*erp)); 2309 } 2310 } 2311 2312 2313 void ieee802_1x_deinit(struct hostapd_data *hapd) 2314 { 2315 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL); 2316 2317 if (hapd->driver && hapd->drv_priv && 2318 (hapd->conf->ieee802_1x || hapd->conf->wpa)) 2319 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0); 2320 2321 eapol_auth_deinit(hapd->eapol_auth); 2322 hapd->eapol_auth = NULL; 2323 2324 ieee802_1x_erp_flush(hapd); 2325 } 2326 2327 2328 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 2329 const u8 *buf, size_t len, int ack) 2330 { 2331 struct ieee80211_hdr *hdr; 2332 u8 *pos; 2333 const unsigned char rfc1042_hdr[ETH_ALEN] = 2334 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 2335 2336 if (sta == NULL) 2337 return -1; 2338 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2) 2339 return 0; 2340 2341 hdr = (struct ieee80211_hdr *) buf; 2342 pos = (u8 *) (hdr + 1); 2343 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0) 2344 return 0; 2345 pos += sizeof(rfc1042_hdr); 2346 if (WPA_GET_BE16(pos) != ETH_P_PAE) 2347 return 0; 2348 pos += 2; 2349 2350 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos, 2351 ack); 2352 } 2353 2354 2355 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 2356 const u8 *buf, int len, int ack) 2357 { 2358 const struct ieee802_1x_hdr *xhdr = 2359 (const struct ieee802_1x_hdr *) buf; 2360 const u8 *pos = buf + sizeof(*xhdr); 2361 struct ieee802_1x_eapol_key *key; 2362 2363 if (len < (int) sizeof(*xhdr)) 2364 return 0; 2365 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d " 2366 "type=%d length=%d - ack=%d", 2367 MAC2STR(sta->addr), xhdr->version, xhdr->type, 2368 be_to_host16(xhdr->length), ack); 2369 2370 #ifdef CONFIG_WPS 2371 if (xhdr->type == IEEE802_1X_TYPE_EAP_PACKET && ack && 2372 (sta->flags & WLAN_STA_WPS) && 2373 ap_sta_pending_delayed_1x_auth_fail_disconnect(hapd, sta)) { 2374 wpa_printf(MSG_DEBUG, 2375 "WPS: Indicate EAP completion on ACK for EAP-Failure"); 2376 hostapd_wps_eap_completed(hapd); 2377 } 2378 #endif /* CONFIG_WPS */ 2379 2380 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY) 2381 return 0; 2382 2383 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) { 2384 const struct wpa_eapol_key *wpa; 2385 wpa = (const struct wpa_eapol_key *) pos; 2386 if (wpa->type == EAPOL_KEY_TYPE_RSN || 2387 wpa->type == EAPOL_KEY_TYPE_WPA) 2388 wpa_auth_eapol_key_tx_status(hapd->wpa_auth, 2389 sta->wpa_sm, ack); 2390 } 2391 2392 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant 2393 * or Authenticator state machines, but EAPOL-Key packets are not 2394 * retransmitted in case of failure. Try to re-send failed EAPOL-Key 2395 * packets couple of times because otherwise STA keys become 2396 * unsynchronized with AP. */ 2397 if (!ack && pos + sizeof(*key) <= buf + len) { 2398 key = (struct ieee802_1x_eapol_key *) pos; 2399 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 2400 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key " 2401 "frame (%scast index=%d)", 2402 key->key_index & BIT(7) ? "uni" : "broad", 2403 key->key_index & ~BIT(7)); 2404 /* TODO: re-send EAPOL-Key couple of times (with short delay 2405 * between them?). If all attempt fail, report error and 2406 * deauthenticate STA so that it will get new keys when 2407 * authenticating again (e.g., after returning in range). 2408 * Separate limit/transmit state needed both for unicast and 2409 * broadcast keys(?) */ 2410 } 2411 /* TODO: could move unicast key configuration from ieee802_1x_tx_key() 2412 * to here and change the key only if the EAPOL-Key packet was Acked. 2413 */ 2414 2415 return 1; 2416 } 2417 2418 2419 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len) 2420 { 2421 if (sm == NULL || sm->identity == NULL) 2422 return NULL; 2423 2424 *len = sm->identity_len; 2425 return sm->identity; 2426 } 2427 2428 2429 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len, 2430 int idx) 2431 { 2432 if (sm == NULL || sm->radius_class.attr == NULL || 2433 idx >= (int) sm->radius_class.count) 2434 return NULL; 2435 2436 *len = sm->radius_class.attr[idx].len; 2437 return sm->radius_class.attr[idx].data; 2438 } 2439 2440 2441 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm) 2442 { 2443 if (sm == NULL) 2444 return NULL; 2445 return sm->radius_cui; 2446 } 2447 2448 2449 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len) 2450 { 2451 *len = 0; 2452 if (sm == NULL) 2453 return NULL; 2454 2455 *len = sm->eap_if->eapKeyDataLen; 2456 return sm->eap_if->eapKeyData; 2457 } 2458 2459 2460 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm, 2461 int enabled) 2462 { 2463 if (sm == NULL) 2464 return; 2465 sm->eap_if->portEnabled = enabled ? TRUE : FALSE; 2466 eapol_auth_step(sm); 2467 } 2468 2469 2470 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, 2471 int valid) 2472 { 2473 if (sm == NULL) 2474 return; 2475 sm->portValid = valid ? TRUE : FALSE; 2476 eapol_auth_step(sm); 2477 } 2478 2479 2480 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth) 2481 { 2482 if (sm == NULL) 2483 return; 2484 if (pre_auth) 2485 sm->flags |= EAPOL_SM_PREAUTH; 2486 else 2487 sm->flags &= ~EAPOL_SM_PREAUTH; 2488 } 2489 2490 2491 static const char * bool_txt(Boolean val) 2492 { 2493 return val ? "TRUE" : "FALSE"; 2494 } 2495 2496 2497 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2498 { 2499 /* TODO */ 2500 return 0; 2501 } 2502 2503 2504 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2505 char *buf, size_t buflen) 2506 { 2507 int len = 0, ret; 2508 struct eapol_state_machine *sm = sta->eapol_sm; 2509 struct os_reltime diff; 2510 const char *name1; 2511 const char *name2; 2512 2513 if (sm == NULL) 2514 return 0; 2515 2516 ret = os_snprintf(buf + len, buflen - len, 2517 "dot1xPaePortNumber=%d\n" 2518 "dot1xPaePortProtocolVersion=%d\n" 2519 "dot1xPaePortCapabilities=1\n" 2520 "dot1xPaePortInitialize=%d\n" 2521 "dot1xPaePortReauthenticate=FALSE\n", 2522 sta->aid, 2523 EAPOL_VERSION, 2524 sm->initialize); 2525 if (os_snprintf_error(buflen - len, ret)) 2526 return len; 2527 len += ret; 2528 2529 /* dot1xAuthConfigTable */ 2530 ret = os_snprintf(buf + len, buflen - len, 2531 "dot1xAuthPaeState=%d\n" 2532 "dot1xAuthBackendAuthState=%d\n" 2533 "dot1xAuthAdminControlledDirections=%d\n" 2534 "dot1xAuthOperControlledDirections=%d\n" 2535 "dot1xAuthAuthControlledPortStatus=%d\n" 2536 "dot1xAuthAuthControlledPortControl=%d\n" 2537 "dot1xAuthQuietPeriod=%u\n" 2538 "dot1xAuthServerTimeout=%u\n" 2539 "dot1xAuthReAuthPeriod=%u\n" 2540 "dot1xAuthReAuthEnabled=%s\n" 2541 "dot1xAuthKeyTxEnabled=%s\n", 2542 sm->auth_pae_state + 1, 2543 sm->be_auth_state + 1, 2544 sm->adminControlledDirections, 2545 sm->operControlledDirections, 2546 sm->authPortStatus, 2547 sm->portControl, 2548 sm->quietPeriod, 2549 sm->serverTimeout, 2550 sm->reAuthPeriod, 2551 bool_txt(sm->reAuthEnabled), 2552 bool_txt(sm->keyTxEnabled)); 2553 if (os_snprintf_error(buflen - len, ret)) 2554 return len; 2555 len += ret; 2556 2557 /* dot1xAuthStatsTable */ 2558 ret = os_snprintf(buf + len, buflen - len, 2559 "dot1xAuthEapolFramesRx=%u\n" 2560 "dot1xAuthEapolFramesTx=%u\n" 2561 "dot1xAuthEapolStartFramesRx=%u\n" 2562 "dot1xAuthEapolLogoffFramesRx=%u\n" 2563 "dot1xAuthEapolRespIdFramesRx=%u\n" 2564 "dot1xAuthEapolRespFramesRx=%u\n" 2565 "dot1xAuthEapolReqIdFramesTx=%u\n" 2566 "dot1xAuthEapolReqFramesTx=%u\n" 2567 "dot1xAuthInvalidEapolFramesRx=%u\n" 2568 "dot1xAuthEapLengthErrorFramesRx=%u\n" 2569 "dot1xAuthLastEapolFrameVersion=%u\n" 2570 "dot1xAuthLastEapolFrameSource=" MACSTR "\n", 2571 sm->dot1xAuthEapolFramesRx, 2572 sm->dot1xAuthEapolFramesTx, 2573 sm->dot1xAuthEapolStartFramesRx, 2574 sm->dot1xAuthEapolLogoffFramesRx, 2575 sm->dot1xAuthEapolRespIdFramesRx, 2576 sm->dot1xAuthEapolRespFramesRx, 2577 sm->dot1xAuthEapolReqIdFramesTx, 2578 sm->dot1xAuthEapolReqFramesTx, 2579 sm->dot1xAuthInvalidEapolFramesRx, 2580 sm->dot1xAuthEapLengthErrorFramesRx, 2581 sm->dot1xAuthLastEapolFrameVersion, 2582 MAC2STR(sm->addr)); 2583 if (os_snprintf_error(buflen - len, ret)) 2584 return len; 2585 len += ret; 2586 2587 /* dot1xAuthDiagTable */ 2588 ret = os_snprintf(buf + len, buflen - len, 2589 "dot1xAuthEntersConnecting=%u\n" 2590 "dot1xAuthEapLogoffsWhileConnecting=%u\n" 2591 "dot1xAuthEntersAuthenticating=%u\n" 2592 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n" 2593 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n" 2594 "dot1xAuthAuthFailWhileAuthenticating=%u\n" 2595 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n" 2596 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n" 2597 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n" 2598 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n" 2599 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n" 2600 "dot1xAuthBackendResponses=%u\n" 2601 "dot1xAuthBackendAccessChallenges=%u\n" 2602 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n" 2603 "dot1xAuthBackendAuthSuccesses=%u\n" 2604 "dot1xAuthBackendAuthFails=%u\n", 2605 sm->authEntersConnecting, 2606 sm->authEapLogoffsWhileConnecting, 2607 sm->authEntersAuthenticating, 2608 sm->authAuthSuccessesWhileAuthenticating, 2609 sm->authAuthTimeoutsWhileAuthenticating, 2610 sm->authAuthFailWhileAuthenticating, 2611 sm->authAuthEapStartsWhileAuthenticating, 2612 sm->authAuthEapLogoffWhileAuthenticating, 2613 sm->authAuthReauthsWhileAuthenticated, 2614 sm->authAuthEapStartsWhileAuthenticated, 2615 sm->authAuthEapLogoffWhileAuthenticated, 2616 sm->backendResponses, 2617 sm->backendAccessChallenges, 2618 sm->backendOtherRequestsToSupplicant, 2619 sm->backendAuthSuccesses, 2620 sm->backendAuthFails); 2621 if (os_snprintf_error(buflen - len, ret)) 2622 return len; 2623 len += ret; 2624 2625 /* dot1xAuthSessionStatsTable */ 2626 os_reltime_age(&sta->acct_session_start, &diff); 2627 ret = os_snprintf(buf + len, buflen - len, 2628 /* TODO: dot1xAuthSessionOctetsRx */ 2629 /* TODO: dot1xAuthSessionOctetsTx */ 2630 /* TODO: dot1xAuthSessionFramesRx */ 2631 /* TODO: dot1xAuthSessionFramesTx */ 2632 "dot1xAuthSessionId=%016llX\n" 2633 "dot1xAuthSessionAuthenticMethod=%d\n" 2634 "dot1xAuthSessionTime=%u\n" 2635 "dot1xAuthSessionTerminateCause=999\n" 2636 "dot1xAuthSessionUserName=%s\n", 2637 (unsigned long long) sta->acct_session_id, 2638 (wpa_key_mgmt_wpa_ieee8021x( 2639 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ? 2640 1 : 2, 2641 (unsigned int) diff.sec, 2642 sm->identity); 2643 if (os_snprintf_error(buflen - len, ret)) 2644 return len; 2645 len += ret; 2646 2647 if (sm->acct_multi_session_id) { 2648 ret = os_snprintf(buf + len, buflen - len, 2649 "authMultiSessionId=%016llX\n", 2650 (unsigned long long) 2651 sm->acct_multi_session_id); 2652 if (os_snprintf_error(buflen - len, ret)) 2653 return len; 2654 len += ret; 2655 } 2656 2657 name1 = eap_server_get_name(0, sm->eap_type_authsrv); 2658 name2 = eap_server_get_name(0, sm->eap_type_supp); 2659 ret = os_snprintf(buf + len, buflen - len, 2660 "last_eap_type_as=%d (%s)\n" 2661 "last_eap_type_sta=%d (%s)\n", 2662 sm->eap_type_authsrv, name1, 2663 sm->eap_type_supp, name2); 2664 if (os_snprintf_error(buflen - len, ret)) 2665 return len; 2666 len += ret; 2667 2668 return len; 2669 } 2670 2671 2672 #ifdef CONFIG_HS20 2673 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx) 2674 { 2675 struct hostapd_data *hapd = eloop_ctx; 2676 struct sta_info *sta = timeout_ctx; 2677 2678 if (sta->remediation) { 2679 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2680 MACSTR " to indicate Subscription Remediation", 2681 MAC2STR(sta->addr)); 2682 hs20_send_wnm_notification(hapd, sta->addr, 2683 sta->remediation_method, 2684 sta->remediation_url); 2685 os_free(sta->remediation_url); 2686 sta->remediation_url = NULL; 2687 } 2688 2689 if (sta->hs20_deauth_req) { 2690 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2691 MACSTR " to indicate imminent deauthentication", 2692 MAC2STR(sta->addr)); 2693 hs20_send_wnm_notification_deauth_req(hapd, sta->addr, 2694 sta->hs20_deauth_req); 2695 } 2696 } 2697 #endif /* CONFIG_HS20 */ 2698 2699 2700 static void ieee802_1x_finished(struct hostapd_data *hapd, 2701 struct sta_info *sta, int success, 2702 int remediation) 2703 { 2704 const u8 *key; 2705 size_t len; 2706 /* TODO: get PMKLifetime from WPA parameters */ 2707 static const int dot11RSNAConfigPMKLifetime = 43200; 2708 unsigned int session_timeout; 2709 2710 #ifdef CONFIG_HS20 2711 if (remediation && !sta->remediation) { 2712 sta->remediation = 1; 2713 os_free(sta->remediation_url); 2714 sta->remediation_url = 2715 os_strdup(hapd->conf->subscr_remediation_url); 2716 sta->remediation_method = 1; /* SOAP-XML SPP */ 2717 } 2718 2719 if (success && (sta->remediation || sta->hs20_deauth_req)) { 2720 wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to " 2721 MACSTR " in 100 ms", MAC2STR(sta->addr)); 2722 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta); 2723 eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send, 2724 hapd, sta); 2725 } 2726 #endif /* CONFIG_HS20 */ 2727 2728 key = ieee802_1x_get_key(sta->eapol_sm, &len); 2729 if (sta->session_timeout_set) 2730 session_timeout = sta->session_timeout; 2731 else 2732 session_timeout = dot11RSNAConfigPMKLifetime; 2733 if (success && key && len >= PMK_LEN && !sta->remediation && 2734 !sta->hs20_deauth_requested && 2735 wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout, 2736 sta->eapol_sm) == 0) { 2737 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 2738 HOSTAPD_LEVEL_DEBUG, 2739 "Added PMKSA cache entry (IEEE 802.1X)"); 2740 } 2741 2742 if (!success) { 2743 /* 2744 * Many devices require deauthentication after WPS provisioning 2745 * and some may not be be able to do that themselves, so 2746 * disconnect the client here. In addition, this may also 2747 * benefit IEEE 802.1X/EAPOL authentication cases, too since 2748 * the EAPOL PAE state machine would remain in HELD state for 2749 * considerable amount of time and some EAP methods, like 2750 * EAP-FAST with anonymous provisioning, may require another 2751 * EAPOL authentication to be started to complete connection. 2752 */ 2753 ap_sta_delayed_1x_auth_fail_disconnect(hapd, sta); 2754 } 2755 } 2756
