1 /* 2 * hostapd / IEEE 802.1X-2004 Authenticator 3 * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "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 (HS20_VERSION > 0x10) 687 ver = 2; /* Release 3 */ 688 if (!radius_msg_add_wfa( 689 msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION, 690 &ver, 1)) { 691 wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP " 692 "version"); 693 goto fail; 694 } 695 696 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) { 697 const u8 *pos; 698 u8 buf[3]; 699 u16 id; 700 pos = wpabuf_head_u8(sta->hs20_ie); 701 buf[0] = (*pos) >> 4; 702 if (((*pos) & HS20_PPS_MO_ID_PRESENT) && 703 wpabuf_len(sta->hs20_ie) >= 3) 704 id = WPA_GET_LE16(pos + 1); 705 else 706 id = 0; 707 WPA_PUT_BE16(buf + 1, id); 708 if (!radius_msg_add_wfa( 709 msg, 710 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION, 711 buf, sizeof(buf))) { 712 wpa_printf(MSG_ERROR, "Could not add HS 2.0 " 713 "STA version"); 714 goto fail; 715 } 716 } 717 718 if (sta->roaming_consortium && 719 !radius_msg_add_wfa( 720 msg, RADIUS_VENDOR_ATTR_WFA_HS20_ROAMING_CONSORTIUM, 721 wpabuf_head(sta->roaming_consortium), 722 wpabuf_len(sta->roaming_consortium))) { 723 wpa_printf(MSG_ERROR, 724 "Could not add HS 2.0 Roaming Consortium"); 725 goto fail; 726 } 727 728 if (hapd->conf->t_c_filename) { 729 be32 timestamp; 730 731 if (!radius_msg_add_wfa( 732 msg, 733 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILENAME, 734 (const u8 *) hapd->conf->t_c_filename, 735 os_strlen(hapd->conf->t_c_filename))) { 736 wpa_printf(MSG_ERROR, 737 "Could not add HS 2.0 T&C Filename"); 738 goto fail; 739 } 740 741 timestamp = host_to_be32(hapd->conf->t_c_timestamp); 742 if (!radius_msg_add_wfa( 743 msg, 744 RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP, 745 (const u8 *) ×tamp, 746 sizeof(timestamp))) { 747 wpa_printf(MSG_ERROR, 748 "Could not add HS 2.0 Timestamp"); 749 goto fail; 750 } 751 } 752 } 753 #endif /* CONFIG_HS20 */ 754 755 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0) 756 goto fail; 757 758 return; 759 760 fail: 761 radius_msg_free(msg); 762 } 763 #endif /* CONFIG_NO_RADIUS */ 764 765 766 static void handle_eap_response(struct hostapd_data *hapd, 767 struct sta_info *sta, struct eap_hdr *eap, 768 size_t len) 769 { 770 u8 type, *data; 771 struct eapol_state_machine *sm = sta->eapol_sm; 772 if (sm == NULL) 773 return; 774 775 data = (u8 *) (eap + 1); 776 777 if (len < sizeof(*eap) + 1) { 778 wpa_printf(MSG_INFO, "handle_eap_response: too short response data"); 779 return; 780 } 781 782 sm->eap_type_supp = type = data[0]; 783 784 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 785 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " 786 "id=%d len=%d) from STA: EAP Response-%s (%d)", 787 eap->code, eap->identifier, be_to_host16(eap->length), 788 eap_server_get_name(0, type), type); 789 790 sm->dot1xAuthEapolRespFramesRx++; 791 792 wpabuf_free(sm->eap_if->eapRespData); 793 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); 794 sm->eapolEap = TRUE; 795 } 796 797 798 static void handle_eap_initiate(struct hostapd_data *hapd, 799 struct sta_info *sta, struct eap_hdr *eap, 800 size_t len) 801 { 802 #ifdef CONFIG_ERP 803 u8 type, *data; 804 struct eapol_state_machine *sm = sta->eapol_sm; 805 806 if (sm == NULL) 807 return; 808 809 if (len < sizeof(*eap) + 1) { 810 wpa_printf(MSG_INFO, 811 "handle_eap_initiate: too short response data"); 812 return; 813 } 814 815 data = (u8 *) (eap + 1); 816 type = data[0]; 817 818 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 819 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " 820 "id=%d len=%d) from STA: EAP Initiate type %u", 821 eap->code, eap->identifier, be_to_host16(eap->length), 822 type); 823 824 wpabuf_free(sm->eap_if->eapRespData); 825 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); 826 sm->eapolEap = TRUE; 827 #endif /* CONFIG_ERP */ 828 } 829 830 831 /* Process incoming EAP packet from Supplicant */ 832 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta, 833 u8 *buf, size_t len) 834 { 835 struct eap_hdr *eap; 836 u16 eap_len; 837 838 if (len < sizeof(*eap)) { 839 wpa_printf(MSG_INFO, " too short EAP packet"); 840 return; 841 } 842 843 eap = (struct eap_hdr *) buf; 844 845 eap_len = be_to_host16(eap->length); 846 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d", 847 eap->code, eap->identifier, eap_len); 848 if (eap_len < sizeof(*eap)) { 849 wpa_printf(MSG_DEBUG, " Invalid EAP length"); 850 return; 851 } else if (eap_len > len) { 852 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP " 853 "packet"); 854 return; 855 } else if (eap_len < len) { 856 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP " 857 "packet", (unsigned long) len - eap_len); 858 } 859 860 switch (eap->code) { 861 case EAP_CODE_REQUEST: 862 wpa_printf(MSG_DEBUG, " (request)"); 863 return; 864 case EAP_CODE_RESPONSE: 865 wpa_printf(MSG_DEBUG, " (response)"); 866 handle_eap_response(hapd, sta, eap, eap_len); 867 break; 868 case EAP_CODE_SUCCESS: 869 wpa_printf(MSG_DEBUG, " (success)"); 870 return; 871 case EAP_CODE_FAILURE: 872 wpa_printf(MSG_DEBUG, " (failure)"); 873 return; 874 case EAP_CODE_INITIATE: 875 wpa_printf(MSG_DEBUG, " (initiate)"); 876 handle_eap_initiate(hapd, sta, eap, eap_len); 877 break; 878 case EAP_CODE_FINISH: 879 wpa_printf(MSG_DEBUG, " (finish)"); 880 break; 881 default: 882 wpa_printf(MSG_DEBUG, " (unknown code)"); 883 return; 884 } 885 } 886 887 888 struct eapol_state_machine * 889 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta) 890 { 891 int flags = 0; 892 if (sta->flags & WLAN_STA_PREAUTH) 893 flags |= EAPOL_SM_PREAUTH; 894 if (sta->wpa_sm) { 895 flags |= EAPOL_SM_USES_WPA; 896 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) 897 flags |= EAPOL_SM_FROM_PMKSA_CACHE; 898 } 899 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags, 900 sta->wps_ie, sta->p2p_ie, sta, 901 sta->identity, sta->radius_cui); 902 } 903 904 905 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf, 906 size_t len) 907 { 908 if (sta->pending_eapol_rx) { 909 wpabuf_free(sta->pending_eapol_rx->buf); 910 } else { 911 sta->pending_eapol_rx = 912 os_malloc(sizeof(*sta->pending_eapol_rx)); 913 if (!sta->pending_eapol_rx) 914 return; 915 } 916 917 sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len); 918 if (!sta->pending_eapol_rx->buf) { 919 os_free(sta->pending_eapol_rx); 920 sta->pending_eapol_rx = NULL; 921 return; 922 } 923 924 os_get_reltime(&sta->pending_eapol_rx->rx_time); 925 } 926 927 928 /** 929 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant 930 * @hapd: hostapd BSS data 931 * @sa: Source address (sender of the EAPOL frame) 932 * @buf: EAPOL frame 933 * @len: Length of buf in octets 934 * 935 * This function is called for each incoming EAPOL frame from the interface 936 */ 937 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf, 938 size_t len) 939 { 940 struct sta_info *sta; 941 struct ieee802_1x_hdr *hdr; 942 struct ieee802_1x_eapol_key *key; 943 u16 datalen; 944 struct rsn_pmksa_cache_entry *pmksa; 945 int key_mgmt; 946 947 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen && 948 !hapd->conf->wps_state) 949 return; 950 951 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR, 952 (unsigned long) len, MAC2STR(sa)); 953 sta = ap_get_sta(hapd, sa); 954 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) && 955 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) { 956 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not " 957 "associated/Pre-authenticating STA"); 958 959 if (sta && (sta->flags & WLAN_STA_AUTH)) { 960 wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR 961 " for later use", MAC2STR(sta->addr)); 962 ieee802_1x_save_eapol(sta, buf, len); 963 } 964 965 return; 966 } 967 968 if (len < sizeof(*hdr)) { 969 wpa_printf(MSG_INFO, " too short IEEE 802.1X packet"); 970 return; 971 } 972 973 hdr = (struct ieee802_1x_hdr *) buf; 974 datalen = be_to_host16(hdr->length); 975 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d", 976 hdr->version, hdr->type, datalen); 977 978 if (len - sizeof(*hdr) < datalen) { 979 wpa_printf(MSG_INFO, " frame too short for this IEEE 802.1X packet"); 980 if (sta->eapol_sm) 981 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++; 982 return; 983 } 984 if (len - sizeof(*hdr) > datalen) { 985 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after " 986 "IEEE 802.1X packet", 987 (unsigned long) len - sizeof(*hdr) - datalen); 988 } 989 990 if (sta->eapol_sm) { 991 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version; 992 sta->eapol_sm->dot1xAuthEapolFramesRx++; 993 } 994 995 key = (struct ieee802_1x_eapol_key *) (hdr + 1); 996 if (datalen >= sizeof(struct ieee802_1x_eapol_key) && 997 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY && 998 (key->type == EAPOL_KEY_TYPE_WPA || 999 key->type == EAPOL_KEY_TYPE_RSN)) { 1000 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr, 1001 sizeof(*hdr) + datalen); 1002 return; 1003 } 1004 1005 if (!hapd->conf->ieee802_1x && !hapd->conf->osen && 1006 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) { 1007 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 1008 "802.1X not enabled and WPS not used"); 1009 return; 1010 } 1011 1012 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 1013 if (key_mgmt != -1 && 1014 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE || 1015 key_mgmt == WPA_KEY_MGMT_DPP)) { 1016 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 1017 "STA is using PSK"); 1018 return; 1019 } 1020 1021 if (!sta->eapol_sm) { 1022 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 1023 if (!sta->eapol_sm) 1024 return; 1025 1026 #ifdef CONFIG_WPS 1027 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) { 1028 u32 wflags = sta->flags & (WLAN_STA_WPS | 1029 WLAN_STA_WPS2 | 1030 WLAN_STA_MAYBE_WPS); 1031 if (wflags == WLAN_STA_MAYBE_WPS || 1032 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) { 1033 /* 1034 * Delay EAPOL frame transmission until a 1035 * possible WPS STA initiates the handshake 1036 * with EAPOL-Start. Only allow the wait to be 1037 * skipped if the STA is known to support WPS 1038 * 2.0. 1039 */ 1040 wpa_printf(MSG_DEBUG, "WPS: Do not start " 1041 "EAPOL until EAPOL-Start is " 1042 "received"); 1043 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 1044 } 1045 } 1046 #endif /* CONFIG_WPS */ 1047 1048 sta->eapol_sm->eap_if->portEnabled = TRUE; 1049 } 1050 1051 /* since we support version 1, we can ignore version field and proceed 1052 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */ 1053 /* TODO: actually, we are not version 1 anymore.. However, Version 2 1054 * does not change frame contents, so should be ok to process frames 1055 * more or less identically. Some changes might be needed for 1056 * verification of fields. */ 1057 1058 switch (hdr->type) { 1059 case IEEE802_1X_TYPE_EAP_PACKET: 1060 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen); 1061 break; 1062 1063 case IEEE802_1X_TYPE_EAPOL_START: 1064 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1065 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start " 1066 "from STA"); 1067 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 1068 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 1069 if (pmksa) { 1070 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 1071 HOSTAPD_LEVEL_DEBUG, "cached PMKSA " 1072 "available - ignore it since " 1073 "STA sent EAPOL-Start"); 1074 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa); 1075 } 1076 sta->eapol_sm->eapolStart = TRUE; 1077 sta->eapol_sm->dot1xAuthEapolStartFramesRx++; 1078 eap_server_clear_identity(sta->eapol_sm->eap); 1079 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 1080 break; 1081 1082 case IEEE802_1X_TYPE_EAPOL_LOGOFF: 1083 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1084 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff " 1085 "from STA"); 1086 sta->acct_terminate_cause = 1087 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 1088 accounting_sta_stop(hapd, sta); 1089 sta->eapol_sm->eapolLogoff = TRUE; 1090 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++; 1091 eap_server_clear_identity(sta->eapol_sm->eap); 1092 break; 1093 1094 case IEEE802_1X_TYPE_EAPOL_KEY: 1095 wpa_printf(MSG_DEBUG, " EAPOL-Key"); 1096 if (!ap_sta_is_authorized(sta)) { 1097 wpa_printf(MSG_DEBUG, " Dropped key data from " 1098 "unauthorized Supplicant"); 1099 break; 1100 } 1101 break; 1102 1103 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT: 1104 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert"); 1105 /* TODO: implement support for this; show data */ 1106 break; 1107 1108 default: 1109 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type"); 1110 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++; 1111 break; 1112 } 1113 1114 eapol_auth_step(sta->eapol_sm); 1115 } 1116 1117 1118 /** 1119 * ieee802_1x_new_station - Start IEEE 802.1X authentication 1120 * @hapd: hostapd BSS data 1121 * @sta: The station 1122 * 1123 * This function is called to start IEEE 802.1X authentication when a new 1124 * station completes IEEE 802.11 association. 1125 */ 1126 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta) 1127 { 1128 struct rsn_pmksa_cache_entry *pmksa; 1129 int reassoc = 1; 1130 int force_1x = 0; 1131 int key_mgmt; 1132 1133 #ifdef CONFIG_WPS 1134 if (hapd->conf->wps_state && 1135 ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) || 1136 (sta->flags & WLAN_STA_WPS))) { 1137 /* 1138 * Need to enable IEEE 802.1X/EAPOL state machines for possible 1139 * WPS handshake even if IEEE 802.1X/EAPOL is not used for 1140 * authentication in this BSS. 1141 */ 1142 force_1x = 1; 1143 } 1144 #endif /* CONFIG_WPS */ 1145 1146 if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) { 1147 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - " 1148 "802.1X not enabled or forced for WPS"); 1149 /* 1150 * Clear any possible EAPOL authenticator state to support 1151 * reassociation change from WPS to PSK. 1152 */ 1153 ieee802_1x_free_station(hapd, sta); 1154 return; 1155 } 1156 1157 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 1158 if (key_mgmt != -1 && 1159 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE || 1160 key_mgmt == WPA_KEY_MGMT_DPP)) { 1161 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK"); 1162 /* 1163 * Clear any possible EAPOL authenticator state to support 1164 * reassociation change from WPA-EAP to PSK. 1165 */ 1166 ieee802_1x_free_station(hapd, sta); 1167 return; 1168 } 1169 1170 if (sta->eapol_sm == NULL) { 1171 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1172 HOSTAPD_LEVEL_DEBUG, "start authentication"); 1173 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 1174 if (sta->eapol_sm == NULL) { 1175 hostapd_logger(hapd, sta->addr, 1176 HOSTAPD_MODULE_IEEE8021X, 1177 HOSTAPD_LEVEL_INFO, 1178 "failed to allocate state machine"); 1179 return; 1180 } 1181 reassoc = 0; 1182 } 1183 1184 #ifdef CONFIG_WPS 1185 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 1186 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state && 1187 !(sta->flags & WLAN_STA_WPS2)) { 1188 /* 1189 * Delay EAPOL frame transmission until a possible WPS STA 1190 * initiates the handshake with EAPOL-Start. Only allow the 1191 * wait to be skipped if the STA is known to support WPS 2.0. 1192 */ 1193 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until " 1194 "EAPOL-Start is received"); 1195 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 1196 } 1197 #endif /* CONFIG_WPS */ 1198 1199 sta->eapol_sm->eap_if->portEnabled = TRUE; 1200 1201 #ifdef CONFIG_IEEE80211R_AP 1202 if (sta->auth_alg == WLAN_AUTH_FT) { 1203 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1204 HOSTAPD_LEVEL_DEBUG, 1205 "PMK from FT - skip IEEE 802.1X/EAP"); 1206 /* Setup EAPOL state machines to already authenticated state 1207 * because of existing FT information from R0KH. */ 1208 sta->eapol_sm->keyRun = TRUE; 1209 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1210 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1211 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1212 sta->eapol_sm->authSuccess = TRUE; 1213 sta->eapol_sm->authFail = FALSE; 1214 sta->eapol_sm->portValid = TRUE; 1215 if (sta->eapol_sm->eap) 1216 eap_sm_notify_cached(sta->eapol_sm->eap); 1217 ap_sta_bind_vlan(hapd, sta); 1218 return; 1219 } 1220 #endif /* CONFIG_IEEE80211R_AP */ 1221 1222 #ifdef CONFIG_FILS 1223 if (sta->auth_alg == WLAN_AUTH_FILS_SK || 1224 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || 1225 sta->auth_alg == WLAN_AUTH_FILS_PK) { 1226 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1227 HOSTAPD_LEVEL_DEBUG, 1228 "PMK from FILS - skip IEEE 802.1X/EAP"); 1229 /* Setup EAPOL state machines to already authenticated state 1230 * because of existing FILS information. */ 1231 sta->eapol_sm->keyRun = TRUE; 1232 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1233 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1234 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1235 sta->eapol_sm->authSuccess = TRUE; 1236 sta->eapol_sm->authFail = FALSE; 1237 sta->eapol_sm->portValid = TRUE; 1238 if (sta->eapol_sm->eap) 1239 eap_sm_notify_cached(sta->eapol_sm->eap); 1240 return; 1241 } 1242 #endif /* CONFIG_FILS */ 1243 1244 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 1245 if (pmksa) { 1246 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1247 HOSTAPD_LEVEL_DEBUG, 1248 "PMK from PMKSA cache - skip IEEE 802.1X/EAP"); 1249 /* Setup EAPOL state machines to already authenticated state 1250 * because of existing PMKSA information in the cache. */ 1251 sta->eapol_sm->keyRun = TRUE; 1252 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1253 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 1254 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 1255 sta->eapol_sm->authSuccess = TRUE; 1256 sta->eapol_sm->authFail = FALSE; 1257 if (sta->eapol_sm->eap) 1258 eap_sm_notify_cached(sta->eapol_sm->eap); 1259 pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm); 1260 ap_sta_bind_vlan(hapd, sta); 1261 } else { 1262 if (reassoc) { 1263 /* 1264 * Force EAPOL state machines to start 1265 * re-authentication without having to wait for the 1266 * Supplicant to send EAPOL-Start. 1267 */ 1268 sta->eapol_sm->reAuthenticate = TRUE; 1269 } 1270 eapol_auth_step(sta->eapol_sm); 1271 } 1272 } 1273 1274 1275 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta) 1276 { 1277 struct eapol_state_machine *sm = sta->eapol_sm; 1278 1279 #ifdef CONFIG_HS20 1280 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta); 1281 #endif /* CONFIG_HS20 */ 1282 1283 if (sta->pending_eapol_rx) { 1284 wpabuf_free(sta->pending_eapol_rx->buf); 1285 os_free(sta->pending_eapol_rx); 1286 sta->pending_eapol_rx = NULL; 1287 } 1288 1289 if (sm == NULL) 1290 return; 1291 1292 sta->eapol_sm = NULL; 1293 1294 #ifndef CONFIG_NO_RADIUS 1295 radius_msg_free(sm->last_recv_radius); 1296 radius_free_class(&sm->radius_class); 1297 #endif /* CONFIG_NO_RADIUS */ 1298 1299 eapol_auth_free(sm); 1300 } 1301 1302 1303 #ifndef CONFIG_NO_RADIUS 1304 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd, 1305 struct sta_info *sta) 1306 { 1307 struct wpabuf *eap; 1308 const struct eap_hdr *hdr; 1309 int eap_type = -1; 1310 char buf[64]; 1311 struct radius_msg *msg; 1312 struct eapol_state_machine *sm = sta->eapol_sm; 1313 1314 if (sm == NULL || sm->last_recv_radius == NULL) { 1315 if (sm) 1316 sm->eap_if->aaaEapNoReq = TRUE; 1317 return; 1318 } 1319 1320 msg = sm->last_recv_radius; 1321 1322 eap = radius_msg_get_eap(msg); 1323 if (eap == NULL) { 1324 /* RFC 3579, Chap. 2.6.3: 1325 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message 1326 * attribute */ 1327 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1328 HOSTAPD_LEVEL_WARNING, "could not extract " 1329 "EAP-Message from RADIUS message"); 1330 sm->eap_if->aaaEapNoReq = TRUE; 1331 return; 1332 } 1333 1334 if (wpabuf_len(eap) < sizeof(*hdr)) { 1335 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1336 HOSTAPD_LEVEL_WARNING, "too short EAP packet " 1337 "received from authentication server"); 1338 wpabuf_free(eap); 1339 sm->eap_if->aaaEapNoReq = TRUE; 1340 return; 1341 } 1342 1343 if (wpabuf_len(eap) > sizeof(*hdr)) 1344 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)]; 1345 1346 hdr = wpabuf_head(eap); 1347 switch (hdr->code) { 1348 case EAP_CODE_REQUEST: 1349 if (eap_type >= 0) 1350 sm->eap_type_authsrv = eap_type; 1351 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)", 1352 eap_server_get_name(0, eap_type), eap_type); 1353 break; 1354 case EAP_CODE_RESPONSE: 1355 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)", 1356 eap_server_get_name(0, eap_type), eap_type); 1357 break; 1358 case EAP_CODE_SUCCESS: 1359 os_strlcpy(buf, "EAP Success", sizeof(buf)); 1360 break; 1361 case EAP_CODE_FAILURE: 1362 os_strlcpy(buf, "EAP Failure", sizeof(buf)); 1363 break; 1364 default: 1365 os_strlcpy(buf, "unknown EAP code", sizeof(buf)); 1366 break; 1367 } 1368 buf[sizeof(buf) - 1] = '\0'; 1369 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1370 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d " 1371 "id=%d len=%d) from RADIUS server: %s", 1372 hdr->code, hdr->identifier, be_to_host16(hdr->length), 1373 buf); 1374 sm->eap_if->aaaEapReq = TRUE; 1375 1376 wpabuf_free(sm->eap_if->aaaEapReqData); 1377 sm->eap_if->aaaEapReqData = eap; 1378 } 1379 1380 1381 static void ieee802_1x_get_keys(struct hostapd_data *hapd, 1382 struct sta_info *sta, struct radius_msg *msg, 1383 struct radius_msg *req, 1384 const u8 *shared_secret, 1385 size_t shared_secret_len) 1386 { 1387 struct radius_ms_mppe_keys *keys; 1388 struct eapol_state_machine *sm = sta->eapol_sm; 1389 if (sm == NULL) 1390 return; 1391 1392 keys = radius_msg_get_ms_keys(msg, req, shared_secret, 1393 shared_secret_len); 1394 1395 if (keys && keys->send && keys->recv) { 1396 size_t len = keys->send_len + keys->recv_len; 1397 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key", 1398 keys->send, keys->send_len); 1399 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key", 1400 keys->recv, keys->recv_len); 1401 1402 os_free(sm->eap_if->aaaEapKeyData); 1403 sm->eap_if->aaaEapKeyData = os_malloc(len); 1404 if (sm->eap_if->aaaEapKeyData) { 1405 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv, 1406 keys->recv_len); 1407 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len, 1408 keys->send, keys->send_len); 1409 sm->eap_if->aaaEapKeyDataLen = len; 1410 sm->eap_if->aaaEapKeyAvailable = TRUE; 1411 } 1412 } else { 1413 wpa_printf(MSG_DEBUG, 1414 "MS-MPPE: 1x_get_keys, could not get keys: %p send: %p recv: %p", 1415 keys, keys ? keys->send : NULL, 1416 keys ? keys->recv : NULL); 1417 } 1418 1419 if (keys) { 1420 os_free(keys->send); 1421 os_free(keys->recv); 1422 os_free(keys); 1423 } 1424 } 1425 1426 1427 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd, 1428 struct sta_info *sta, 1429 struct radius_msg *msg) 1430 { 1431 u8 *attr_class; 1432 size_t class_len; 1433 struct eapol_state_machine *sm = sta->eapol_sm; 1434 int count, i; 1435 struct radius_attr_data *nclass; 1436 size_t nclass_count; 1437 1438 if (!hapd->conf->radius->acct_server || hapd->radius == NULL || 1439 sm == NULL) 1440 return; 1441 1442 radius_free_class(&sm->radius_class); 1443 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1); 1444 if (count <= 0) 1445 return; 1446 1447 nclass = os_calloc(count, sizeof(struct radius_attr_data)); 1448 if (nclass == NULL) 1449 return; 1450 1451 nclass_count = 0; 1452 1453 attr_class = NULL; 1454 for (i = 0; i < count; i++) { 1455 do { 1456 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS, 1457 &attr_class, &class_len, 1458 attr_class) < 0) { 1459 i = count; 1460 break; 1461 } 1462 } while (class_len < 1); 1463 1464 nclass[nclass_count].data = os_memdup(attr_class, class_len); 1465 if (nclass[nclass_count].data == NULL) 1466 break; 1467 1468 nclass[nclass_count].len = class_len; 1469 nclass_count++; 1470 } 1471 1472 sm->radius_class.attr = nclass; 1473 sm->radius_class.count = nclass_count; 1474 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class " 1475 "attributes for " MACSTR, 1476 (unsigned long) sm->radius_class.count, 1477 MAC2STR(sta->addr)); 1478 } 1479 1480 1481 /* Update sta->identity based on User-Name attribute in Access-Accept */ 1482 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd, 1483 struct sta_info *sta, 1484 struct radius_msg *msg) 1485 { 1486 u8 *buf, *identity; 1487 size_t len; 1488 struct eapol_state_machine *sm = sta->eapol_sm; 1489 1490 if (sm == NULL) 1491 return; 1492 1493 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len, 1494 NULL) < 0) 1495 return; 1496 1497 identity = (u8 *) dup_binstr(buf, len); 1498 if (identity == NULL) 1499 return; 1500 1501 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1502 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with " 1503 "User-Name from Access-Accept '%s'", 1504 sm->identity ? (char *) sm->identity : "N/A", 1505 (char *) identity); 1506 1507 os_free(sm->identity); 1508 sm->identity = identity; 1509 sm->identity_len = len; 1510 } 1511 1512 1513 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */ 1514 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd, 1515 struct sta_info *sta, 1516 struct radius_msg *msg) 1517 { 1518 struct eapol_state_machine *sm = sta->eapol_sm; 1519 struct wpabuf *cui; 1520 u8 *buf; 1521 size_t len; 1522 1523 if (sm == NULL) 1524 return; 1525 1526 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, 1527 &buf, &len, NULL) < 0) 1528 return; 1529 1530 cui = wpabuf_alloc_copy(buf, len); 1531 if (cui == NULL) 1532 return; 1533 1534 wpabuf_free(sm->radius_cui); 1535 sm->radius_cui = cui; 1536 } 1537 1538 1539 #ifdef CONFIG_HS20 1540 1541 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len) 1542 { 1543 sta->remediation = 1; 1544 os_free(sta->remediation_url); 1545 if (len > 2) { 1546 sta->remediation_url = os_malloc(len); 1547 if (!sta->remediation_url) 1548 return; 1549 sta->remediation_method = pos[0]; 1550 os_memcpy(sta->remediation_url, pos + 1, len - 1); 1551 sta->remediation_url[len - 1] = '\0'; 1552 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " 1553 "for " MACSTR " - server method %u URL %s", 1554 MAC2STR(sta->addr), sta->remediation_method, 1555 sta->remediation_url); 1556 } else { 1557 sta->remediation_url = NULL; 1558 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed " 1559 "for " MACSTR, MAC2STR(sta->addr)); 1560 } 1561 /* TODO: assign the STA into remediation VLAN or add filtering */ 1562 } 1563 1564 1565 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd, 1566 struct sta_info *sta, u8 *pos, 1567 size_t len) 1568 { 1569 if (len < 3) 1570 return; /* Malformed information */ 1571 sta->hs20_deauth_requested = 1; 1572 wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u " 1573 "Re-auth Delay %u", 1574 *pos, WPA_GET_LE16(pos + 1)); 1575 wpabuf_free(sta->hs20_deauth_req); 1576 sta->hs20_deauth_req = wpabuf_alloc(len + 1); 1577 if (sta->hs20_deauth_req) { 1578 wpabuf_put_data(sta->hs20_deauth_req, pos, 3); 1579 wpabuf_put_u8(sta->hs20_deauth_req, len - 3); 1580 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3); 1581 } 1582 ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout); 1583 } 1584 1585 1586 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd, 1587 struct sta_info *sta, u8 *pos, 1588 size_t len, int session_timeout) 1589 { 1590 unsigned int swt; 1591 int warning_time, beacon_int; 1592 1593 if (len < 1) 1594 return; /* Malformed information */ 1595 os_free(sta->hs20_session_info_url); 1596 sta->hs20_session_info_url = os_malloc(len); 1597 if (sta->hs20_session_info_url == NULL) 1598 return; 1599 swt = pos[0]; 1600 os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1); 1601 sta->hs20_session_info_url[len - 1] = '\0'; 1602 wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u " 1603 "(session_timeout=%d)", 1604 sta->hs20_session_info_url, swt, session_timeout); 1605 if (session_timeout < 0) { 1606 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL"); 1607 return; 1608 } 1609 if (swt == 255) 1610 swt = 1; /* Use one minute as the AP selected value */ 1611 1612 if ((unsigned int) session_timeout < swt * 60) 1613 warning_time = 0; 1614 else 1615 warning_time = session_timeout - swt * 60; 1616 1617 beacon_int = hapd->iconf->beacon_int; 1618 if (beacon_int < 1) 1619 beacon_int = 100; /* best guess */ 1620 sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128; 1621 if (sta->hs20_disassoc_timer > 65535) 1622 sta->hs20_disassoc_timer = 65535; 1623 1624 ap_sta_session_warning_timeout(hapd, sta, warning_time); 1625 } 1626 1627 1628 static void ieee802_1x_hs20_t_c_filtering(struct hostapd_data *hapd, 1629 struct sta_info *sta, u8 *pos, 1630 size_t len) 1631 { 1632 if (len < 4) 1633 return; /* Malformed information */ 1634 wpa_printf(MSG_DEBUG, 1635 "HS 2.0: Terms and Conditions filtering %02x %02x %02x %02x", 1636 pos[0], pos[1], pos[2], pos[3]); 1637 hs20_t_c_filtering(hapd, sta, pos[0] & BIT(0)); 1638 } 1639 1640 1641 static void ieee802_1x_hs20_t_c_url(struct hostapd_data *hapd, 1642 struct sta_info *sta, u8 *pos, size_t len) 1643 { 1644 os_free(sta->t_c_url); 1645 sta->t_c_url = os_malloc(len + 1); 1646 if (!sta->t_c_url) 1647 return; 1648 os_memcpy(sta->t_c_url, pos, len); 1649 sta->t_c_url[len] = '\0'; 1650 wpa_printf(MSG_DEBUG, 1651 "HS 2.0: Terms and Conditions URL %s", sta->t_c_url); 1652 } 1653 1654 #endif /* CONFIG_HS20 */ 1655 1656 1657 static void ieee802_1x_check_hs20(struct hostapd_data *hapd, 1658 struct sta_info *sta, 1659 struct radius_msg *msg, 1660 int session_timeout) 1661 { 1662 #ifdef CONFIG_HS20 1663 u8 *buf, *pos, *end, type, sublen; 1664 size_t len; 1665 1666 buf = NULL; 1667 sta->remediation = 0; 1668 sta->hs20_deauth_requested = 0; 1669 1670 for (;;) { 1671 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC, 1672 &buf, &len, buf) < 0) 1673 break; 1674 if (len < 6) 1675 continue; 1676 pos = buf; 1677 end = buf + len; 1678 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) 1679 continue; 1680 pos += 4; 1681 1682 type = *pos++; 1683 sublen = *pos++; 1684 if (sublen < 2) 1685 continue; /* invalid length */ 1686 sublen -= 2; /* skip header */ 1687 if (pos + sublen > end) 1688 continue; /* invalid WFA VSA */ 1689 1690 switch (type) { 1691 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION: 1692 ieee802_1x_hs20_sub_rem(sta, pos, sublen); 1693 break; 1694 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ: 1695 ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen); 1696 break; 1697 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL: 1698 ieee802_1x_hs20_session_info(hapd, sta, pos, sublen, 1699 session_timeout); 1700 break; 1701 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING: 1702 ieee802_1x_hs20_t_c_filtering(hapd, sta, pos, sublen); 1703 break; 1704 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL: 1705 ieee802_1x_hs20_t_c_url(hapd, sta, pos, sublen); 1706 break; 1707 } 1708 } 1709 #endif /* CONFIG_HS20 */ 1710 } 1711 1712 1713 struct sta_id_search { 1714 u8 identifier; 1715 struct eapol_state_machine *sm; 1716 }; 1717 1718 1719 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd, 1720 struct sta_info *sta, 1721 void *ctx) 1722 { 1723 struct sta_id_search *id_search = ctx; 1724 struct eapol_state_machine *sm = sta->eapol_sm; 1725 1726 if (sm && sm->radius_identifier >= 0 && 1727 sm->radius_identifier == id_search->identifier) { 1728 id_search->sm = sm; 1729 return 1; 1730 } 1731 return 0; 1732 } 1733 1734 1735 static struct eapol_state_machine * 1736 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier) 1737 { 1738 struct sta_id_search id_search; 1739 id_search.identifier = identifier; 1740 id_search.sm = NULL; 1741 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search); 1742 return id_search.sm; 1743 } 1744 1745 1746 /** 1747 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server 1748 * @msg: RADIUS response message 1749 * @req: RADIUS request message 1750 * @shared_secret: RADIUS shared secret 1751 * @shared_secret_len: Length of shared_secret in octets 1752 * @data: Context data (struct hostapd_data *) 1753 * Returns: Processing status 1754 */ 1755 static RadiusRxResult 1756 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req, 1757 const u8 *shared_secret, size_t shared_secret_len, 1758 void *data) 1759 { 1760 struct hostapd_data *hapd = data; 1761 struct sta_info *sta; 1762 u32 session_timeout = 0, termination_action, acct_interim_interval; 1763 int session_timeout_set; 1764 u32 reason_code; 1765 struct eapol_state_machine *sm; 1766 int override_eapReq = 0; 1767 struct radius_hdr *hdr = radius_msg_get_hdr(msg); 1768 struct vlan_description vlan_desc; 1769 #ifndef CONFIG_NO_VLAN 1770 int *untagged, *tagged, *notempty; 1771 #endif /* CONFIG_NO_VLAN */ 1772 1773 os_memset(&vlan_desc, 0, sizeof(vlan_desc)); 1774 1775 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier); 1776 if (sm == NULL) { 1777 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching " 1778 "station for this RADIUS message"); 1779 return RADIUS_RX_UNKNOWN; 1780 } 1781 sta = sm->sta; 1782 1783 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be 1784 * present when packet contains an EAP-Message attribute */ 1785 if (hdr->code == RADIUS_CODE_ACCESS_REJECT && 1786 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL, 1787 0) < 0 && 1788 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) { 1789 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without " 1790 "Message-Authenticator since it does not include " 1791 "EAP-Message"); 1792 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len, 1793 req, 1)) { 1794 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped"); 1795 return RADIUS_RX_INVALID_AUTHENTICATOR; 1796 } 1797 1798 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT && 1799 hdr->code != RADIUS_CODE_ACCESS_REJECT && 1800 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) { 1801 wpa_printf(MSG_INFO, "Unknown RADIUS message code"); 1802 return RADIUS_RX_UNKNOWN; 1803 } 1804 1805 sm->radius_identifier = -1; 1806 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR, 1807 MAC2STR(sta->addr)); 1808 1809 radius_msg_free(sm->last_recv_radius); 1810 sm->last_recv_radius = msg; 1811 1812 session_timeout_set = 1813 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT, 1814 &session_timeout); 1815 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION, 1816 &termination_action)) 1817 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT; 1818 1819 if (hapd->conf->acct_interim_interval == 0 && 1820 hdr->code == RADIUS_CODE_ACCESS_ACCEPT && 1821 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL, 1822 &acct_interim_interval) == 0) { 1823 if (acct_interim_interval < 60) { 1824 hostapd_logger(hapd, sta->addr, 1825 HOSTAPD_MODULE_IEEE8021X, 1826 HOSTAPD_LEVEL_INFO, 1827 "ignored too small " 1828 "Acct-Interim-Interval %d", 1829 acct_interim_interval); 1830 } else 1831 sta->acct_interim_interval = acct_interim_interval; 1832 } 1833 1834 1835 switch (hdr->code) { 1836 case RADIUS_CODE_ACCESS_ACCEPT: 1837 #ifndef CONFIG_NO_VLAN 1838 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED) { 1839 notempty = &vlan_desc.notempty; 1840 untagged = &vlan_desc.untagged; 1841 tagged = vlan_desc.tagged; 1842 *notempty = !!radius_msg_get_vlanid(msg, untagged, 1843 MAX_NUM_TAGGED_VLAN, 1844 tagged); 1845 } 1846 1847 if (vlan_desc.notempty && 1848 !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) { 1849 sta->eapol_sm->authFail = TRUE; 1850 hostapd_logger(hapd, sta->addr, 1851 HOSTAPD_MODULE_RADIUS, 1852 HOSTAPD_LEVEL_INFO, 1853 "Invalid VLAN %d%s received from RADIUS server", 1854 vlan_desc.untagged, 1855 vlan_desc.tagged[0] ? "+" : ""); 1856 os_memset(&vlan_desc, 0, sizeof(vlan_desc)); 1857 ap_sta_set_vlan(hapd, sta, &vlan_desc); 1858 break; 1859 } 1860 1861 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED && 1862 !vlan_desc.notempty) { 1863 sta->eapol_sm->authFail = TRUE; 1864 hostapd_logger(hapd, sta->addr, 1865 HOSTAPD_MODULE_IEEE8021X, 1866 HOSTAPD_LEVEL_INFO, "authentication " 1867 "server did not include required VLAN " 1868 "ID in Access-Accept"); 1869 break; 1870 } 1871 #endif /* CONFIG_NO_VLAN */ 1872 1873 if (ap_sta_set_vlan(hapd, sta, &vlan_desc) < 0) 1874 break; 1875 1876 #ifndef CONFIG_NO_VLAN 1877 if (sta->vlan_id > 0) { 1878 hostapd_logger(hapd, sta->addr, 1879 HOSTAPD_MODULE_RADIUS, 1880 HOSTAPD_LEVEL_INFO, 1881 "VLAN ID %d", sta->vlan_id); 1882 } 1883 #endif /* CONFIG_NO_VLAN */ 1884 1885 if ((sta->flags & WLAN_STA_ASSOC) && 1886 ap_sta_bind_vlan(hapd, sta) < 0) 1887 break; 1888 1889 sta->session_timeout_set = !!session_timeout_set; 1890 os_get_reltime(&sta->session_timeout); 1891 sta->session_timeout.sec += session_timeout; 1892 1893 /* RFC 3580, Ch. 3.17 */ 1894 if (session_timeout_set && termination_action == 1895 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) 1896 sm->reAuthPeriod = session_timeout; 1897 else if (session_timeout_set) 1898 ap_sta_session_timeout(hapd, sta, session_timeout); 1899 else 1900 ap_sta_no_session_timeout(hapd, sta); 1901 1902 sm->eap_if->aaaSuccess = TRUE; 1903 override_eapReq = 1; 1904 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret, 1905 shared_secret_len); 1906 ieee802_1x_store_radius_class(hapd, sta, msg); 1907 ieee802_1x_update_sta_identity(hapd, sta, msg); 1908 ieee802_1x_update_sta_cui(hapd, sta, msg); 1909 ieee802_1x_check_hs20(hapd, sta, msg, 1910 session_timeout_set ? 1911 (int) session_timeout : -1); 1912 break; 1913 case RADIUS_CODE_ACCESS_REJECT: 1914 sm->eap_if->aaaFail = TRUE; 1915 override_eapReq = 1; 1916 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE, 1917 &reason_code) == 0) { 1918 wpa_printf(MSG_DEBUG, 1919 "RADIUS server indicated WLAN-Reason-Code %u in Access-Reject for " 1920 MACSTR, reason_code, MAC2STR(sta->addr)); 1921 sta->disconnect_reason_code = reason_code; 1922 } 1923 break; 1924 case RADIUS_CODE_ACCESS_CHALLENGE: 1925 sm->eap_if->aaaEapReq = TRUE; 1926 if (session_timeout_set) { 1927 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */ 1928 sm->eap_if->aaaMethodTimeout = session_timeout; 1929 hostapd_logger(hapd, sm->addr, 1930 HOSTAPD_MODULE_IEEE8021X, 1931 HOSTAPD_LEVEL_DEBUG, 1932 "using EAP timeout of %d seconds (from " 1933 "RADIUS)", 1934 sm->eap_if->aaaMethodTimeout); 1935 } else { 1936 /* 1937 * Use dynamic retransmission behavior per EAP 1938 * specification. 1939 */ 1940 sm->eap_if->aaaMethodTimeout = 0; 1941 } 1942 break; 1943 } 1944 1945 ieee802_1x_decapsulate_radius(hapd, sta); 1946 if (override_eapReq) 1947 sm->eap_if->aaaEapReq = FALSE; 1948 1949 #ifdef CONFIG_FILS 1950 #ifdef NEED_AP_MLME 1951 if (sta->flags & WLAN_STA_PENDING_FILS_ERP) { 1952 /* TODO: Add a PMKSA entry on success? */ 1953 ieee802_11_finish_fils_auth( 1954 hapd, sta, hdr->code == RADIUS_CODE_ACCESS_ACCEPT, 1955 sm->eap_if->aaaEapReqData, 1956 sm->eap_if->aaaEapKeyData, 1957 sm->eap_if->aaaEapKeyDataLen); 1958 } 1959 #endif /* NEED_AP_MLME */ 1960 #endif /* CONFIG_FILS */ 1961 1962 eapol_auth_step(sm); 1963 1964 return RADIUS_RX_QUEUED; 1965 } 1966 #endif /* CONFIG_NO_RADIUS */ 1967 1968 1969 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta) 1970 { 1971 struct eapol_state_machine *sm = sta->eapol_sm; 1972 if (sm == NULL) 1973 return; 1974 1975 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1976 HOSTAPD_LEVEL_DEBUG, "aborting authentication"); 1977 1978 #ifndef CONFIG_NO_RADIUS 1979 radius_msg_free(sm->last_recv_radius); 1980 sm->last_recv_radius = NULL; 1981 #endif /* CONFIG_NO_RADIUS */ 1982 1983 if (sm->eap_if->eapTimeout) { 1984 /* 1985 * Disconnect the STA since it did not reply to the last EAP 1986 * request and we cannot continue EAP processing (EAP-Failure 1987 * could only be sent if the EAP peer actually replied). 1988 */ 1989 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR, 1990 MAC2STR(sta->addr)); 1991 1992 sm->eap_if->portEnabled = FALSE; 1993 ap_sta_disconnect(hapd, sta, sta->addr, 1994 WLAN_REASON_PREV_AUTH_NOT_VALID); 1995 } 1996 } 1997 1998 1999 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd) 2000 { 2001 struct eapol_authenticator *eapol = hapd->eapol_auth; 2002 2003 if (hapd->conf->default_wep_key_len < 1) 2004 return 0; 2005 2006 os_free(eapol->default_wep_key); 2007 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len); 2008 if (eapol->default_wep_key == NULL || 2009 random_get_bytes(eapol->default_wep_key, 2010 hapd->conf->default_wep_key_len)) { 2011 wpa_printf(MSG_INFO, "Could not generate random WEP key"); 2012 os_free(eapol->default_wep_key); 2013 eapol->default_wep_key = NULL; 2014 return -1; 2015 } 2016 2017 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key", 2018 eapol->default_wep_key, 2019 hapd->conf->default_wep_key_len); 2020 2021 return 0; 2022 } 2023 2024 2025 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd, 2026 struct sta_info *sta, void *ctx) 2027 { 2028 if (sta->eapol_sm) { 2029 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 2030 eapol_auth_step(sta->eapol_sm); 2031 } 2032 return 0; 2033 } 2034 2035 2036 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx) 2037 { 2038 struct hostapd_data *hapd = eloop_ctx; 2039 struct eapol_authenticator *eapol = hapd->eapol_auth; 2040 2041 if (eapol->default_wep_key_idx >= 3) 2042 eapol->default_wep_key_idx = 2043 hapd->conf->individual_wep_key_len > 0 ? 1 : 0; 2044 else 2045 eapol->default_wep_key_idx++; 2046 2047 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d", 2048 eapol->default_wep_key_idx); 2049 2050 if (ieee802_1x_rekey_broadcast(hapd)) { 2051 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 2052 HOSTAPD_LEVEL_WARNING, "failed to generate a " 2053 "new broadcast key"); 2054 os_free(eapol->default_wep_key); 2055 eapol->default_wep_key = NULL; 2056 return; 2057 } 2058 2059 /* TODO: Could setup key for RX here, but change default TX keyid only 2060 * after new broadcast key has been sent to all stations. */ 2061 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, 2062 broadcast_ether_addr, 2063 eapol->default_wep_key_idx, 1, NULL, 0, 2064 eapol->default_wep_key, 2065 hapd->conf->default_wep_key_len)) { 2066 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 2067 HOSTAPD_LEVEL_WARNING, "failed to configure a " 2068 "new broadcast key"); 2069 os_free(eapol->default_wep_key); 2070 eapol->default_wep_key = NULL; 2071 return; 2072 } 2073 2074 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL); 2075 2076 if (hapd->conf->wep_rekeying_period > 0) { 2077 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0, 2078 ieee802_1x_rekey, hapd, NULL); 2079 } 2080 } 2081 2082 2083 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type, 2084 const u8 *data, size_t datalen) 2085 { 2086 #ifdef CONFIG_WPS 2087 struct sta_info *sta = sta_ctx; 2088 2089 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) == 2090 WLAN_STA_MAYBE_WPS) { 2091 const u8 *identity; 2092 size_t identity_len; 2093 struct eapol_state_machine *sm = sta->eapol_sm; 2094 2095 identity = eap_get_identity(sm->eap, &identity_len); 2096 if (identity && 2097 ((identity_len == WSC_ID_ENROLLEE_LEN && 2098 os_memcmp(identity, WSC_ID_ENROLLEE, 2099 WSC_ID_ENROLLEE_LEN) == 0) || 2100 (identity_len == WSC_ID_REGISTRAR_LEN && 2101 os_memcmp(identity, WSC_ID_REGISTRAR, 2102 WSC_ID_REGISTRAR_LEN) == 0))) { 2103 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> " 2104 "WLAN_STA_WPS"); 2105 sta->flags |= WLAN_STA_WPS; 2106 } 2107 } 2108 #endif /* CONFIG_WPS */ 2109 2110 ieee802_1x_send(ctx, sta_ctx, type, data, datalen); 2111 } 2112 2113 2114 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx, 2115 const u8 *data, size_t datalen) 2116 { 2117 #ifndef CONFIG_NO_RADIUS 2118 struct hostapd_data *hapd = ctx; 2119 struct sta_info *sta = sta_ctx; 2120 2121 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen); 2122 #endif /* CONFIG_NO_RADIUS */ 2123 } 2124 2125 2126 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success, 2127 int preauth, int remediation) 2128 { 2129 struct hostapd_data *hapd = ctx; 2130 struct sta_info *sta = sta_ctx; 2131 if (preauth) 2132 rsn_preauth_finished(hapd, sta, success); 2133 else 2134 ieee802_1x_finished(hapd, sta, success, remediation); 2135 } 2136 2137 2138 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity, 2139 size_t identity_len, int phase2, 2140 struct eap_user *user) 2141 { 2142 struct hostapd_data *hapd = ctx; 2143 const struct hostapd_eap_user *eap_user; 2144 int i; 2145 int rv = -1; 2146 2147 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2); 2148 if (eap_user == NULL) 2149 goto out; 2150 2151 os_memset(user, 0, sizeof(*user)); 2152 user->phase2 = phase2; 2153 for (i = 0; i < EAP_MAX_METHODS; i++) { 2154 user->methods[i].vendor = eap_user->methods[i].vendor; 2155 user->methods[i].method = eap_user->methods[i].method; 2156 } 2157 2158 if (eap_user->password) { 2159 user->password = os_memdup(eap_user->password, 2160 eap_user->password_len); 2161 if (user->password == NULL) 2162 goto out; 2163 user->password_len = eap_user->password_len; 2164 user->password_hash = eap_user->password_hash; 2165 if (eap_user->salt && eap_user->salt_len) { 2166 user->salt = os_memdup(eap_user->salt, 2167 eap_user->salt_len); 2168 if (!user->salt) 2169 goto out; 2170 user->salt_len = eap_user->salt_len; 2171 } 2172 } 2173 user->force_version = eap_user->force_version; 2174 user->macacl = eap_user->macacl; 2175 user->ttls_auth = eap_user->ttls_auth; 2176 user->remediation = eap_user->remediation; 2177 rv = 0; 2178 2179 out: 2180 if (rv) 2181 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__); 2182 2183 return rv; 2184 } 2185 2186 2187 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr) 2188 { 2189 struct hostapd_data *hapd = ctx; 2190 struct sta_info *sta; 2191 sta = ap_get_sta(hapd, addr); 2192 if (sta == NULL || sta->eapol_sm == NULL) 2193 return 0; 2194 return 1; 2195 } 2196 2197 2198 static void ieee802_1x_logger(void *ctx, const u8 *addr, 2199 eapol_logger_level level, const char *txt) 2200 { 2201 #ifndef CONFIG_NO_HOSTAPD_LOGGER 2202 struct hostapd_data *hapd = ctx; 2203 int hlevel; 2204 2205 switch (level) { 2206 case EAPOL_LOGGER_WARNING: 2207 hlevel = HOSTAPD_LEVEL_WARNING; 2208 break; 2209 case EAPOL_LOGGER_INFO: 2210 hlevel = HOSTAPD_LEVEL_INFO; 2211 break; 2212 case EAPOL_LOGGER_DEBUG: 2213 default: 2214 hlevel = HOSTAPD_LEVEL_DEBUG; 2215 break; 2216 } 2217 2218 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s", 2219 txt); 2220 #endif /* CONFIG_NO_HOSTAPD_LOGGER */ 2221 } 2222 2223 2224 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx, 2225 int authorized) 2226 { 2227 struct hostapd_data *hapd = ctx; 2228 struct sta_info *sta = sta_ctx; 2229 ieee802_1x_set_sta_authorized(hapd, sta, authorized); 2230 } 2231 2232 2233 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx) 2234 { 2235 struct hostapd_data *hapd = ctx; 2236 struct sta_info *sta = sta_ctx; 2237 ieee802_1x_abort_auth(hapd, sta); 2238 } 2239 2240 2241 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx) 2242 { 2243 #ifndef CONFIG_FIPS 2244 #ifndef CONFIG_NO_RC4 2245 struct hostapd_data *hapd = ctx; 2246 struct sta_info *sta = sta_ctx; 2247 ieee802_1x_tx_key(hapd, sta); 2248 #endif /* CONFIG_NO_RC4 */ 2249 #endif /* CONFIG_FIPS */ 2250 } 2251 2252 2253 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx, 2254 enum eapol_event type) 2255 { 2256 /* struct hostapd_data *hapd = ctx; */ 2257 struct sta_info *sta = sta_ctx; 2258 switch (type) { 2259 case EAPOL_AUTH_SM_CHANGE: 2260 wpa_auth_sm_notify(sta->wpa_sm); 2261 break; 2262 case EAPOL_AUTH_REAUTHENTICATE: 2263 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 2264 break; 2265 } 2266 } 2267 2268 2269 #ifdef CONFIG_ERP 2270 2271 static struct eap_server_erp_key * 2272 ieee802_1x_erp_get_key(void *ctx, const char *keyname) 2273 { 2274 struct hostapd_data *hapd = ctx; 2275 struct eap_server_erp_key *erp; 2276 2277 dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key, 2278 list) { 2279 if (os_strcmp(erp->keyname_nai, keyname) == 0) 2280 return erp; 2281 } 2282 2283 return NULL; 2284 } 2285 2286 2287 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp) 2288 { 2289 struct hostapd_data *hapd = ctx; 2290 2291 dl_list_add(&hapd->erp_keys, &erp->list); 2292 return 0; 2293 } 2294 2295 #endif /* CONFIG_ERP */ 2296 2297 2298 int ieee802_1x_init(struct hostapd_data *hapd) 2299 { 2300 int i; 2301 struct eapol_auth_config conf; 2302 struct eapol_auth_cb cb; 2303 2304 dl_list_init(&hapd->erp_keys); 2305 2306 os_memset(&conf, 0, sizeof(conf)); 2307 conf.ctx = hapd; 2308 conf.eap_reauth_period = hapd->conf->eap_reauth_period; 2309 conf.wpa = hapd->conf->wpa; 2310 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len; 2311 conf.eap_server = hapd->conf->eap_server; 2312 conf.ssl_ctx = hapd->ssl_ctx; 2313 conf.msg_ctx = hapd->msg_ctx; 2314 conf.eap_sim_db_priv = hapd->eap_sim_db_priv; 2315 conf.eap_req_id_text = hapd->conf->eap_req_id_text; 2316 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len; 2317 conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start; 2318 conf.erp_domain = hapd->conf->erp_domain; 2319 conf.erp = hapd->conf->eap_server_erp; 2320 conf.tls_session_lifetime = hapd->conf->tls_session_lifetime; 2321 conf.tls_flags = hapd->conf->tls_flags; 2322 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key; 2323 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id; 2324 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len; 2325 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info; 2326 conf.eap_fast_prov = hapd->conf->eap_fast_prov; 2327 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime; 2328 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time; 2329 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind; 2330 conf.tnc = hapd->conf->tnc; 2331 conf.wps = hapd->wps; 2332 conf.fragment_size = hapd->conf->fragment_size; 2333 conf.pwd_group = hapd->conf->pwd_group; 2334 conf.pbc_in_m1 = hapd->conf->pbc_in_m1; 2335 if (hapd->conf->server_id) { 2336 conf.server_id = (const u8 *) hapd->conf->server_id; 2337 conf.server_id_len = os_strlen(hapd->conf->server_id); 2338 } else { 2339 conf.server_id = (const u8 *) "hostapd"; 2340 conf.server_id_len = 7; 2341 } 2342 2343 os_memset(&cb, 0, sizeof(cb)); 2344 cb.eapol_send = ieee802_1x_eapol_send; 2345 cb.aaa_send = ieee802_1x_aaa_send; 2346 cb.finished = _ieee802_1x_finished; 2347 cb.get_eap_user = ieee802_1x_get_eap_user; 2348 cb.sta_entry_alive = ieee802_1x_sta_entry_alive; 2349 cb.logger = ieee802_1x_logger; 2350 cb.set_port_authorized = ieee802_1x_set_port_authorized; 2351 cb.abort_auth = _ieee802_1x_abort_auth; 2352 cb.tx_key = _ieee802_1x_tx_key; 2353 cb.eapol_event = ieee802_1x_eapol_event; 2354 #ifdef CONFIG_ERP 2355 cb.erp_get_key = ieee802_1x_erp_get_key; 2356 cb.erp_add_key = ieee802_1x_erp_add_key; 2357 #endif /* CONFIG_ERP */ 2358 2359 hapd->eapol_auth = eapol_auth_init(&conf, &cb); 2360 if (hapd->eapol_auth == NULL) 2361 return -1; 2362 2363 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) && 2364 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1)) 2365 return -1; 2366 2367 #ifndef CONFIG_NO_RADIUS 2368 if (radius_client_register(hapd->radius, RADIUS_AUTH, 2369 ieee802_1x_receive_auth, hapd)) 2370 return -1; 2371 #endif /* CONFIG_NO_RADIUS */ 2372 2373 if (hapd->conf->default_wep_key_len) { 2374 for (i = 0; i < 4; i++) 2375 hostapd_drv_set_key(hapd->conf->iface, hapd, 2376 WPA_ALG_NONE, NULL, i, 0, NULL, 0, 2377 NULL, 0); 2378 2379 ieee802_1x_rekey(hapd, NULL); 2380 2381 if (hapd->eapol_auth->default_wep_key == NULL) 2382 return -1; 2383 } 2384 2385 return 0; 2386 } 2387 2388 2389 void ieee802_1x_erp_flush(struct hostapd_data *hapd) 2390 { 2391 struct eap_server_erp_key *erp; 2392 2393 while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key, 2394 list)) != NULL) { 2395 dl_list_del(&erp->list); 2396 bin_clear_free(erp, sizeof(*erp)); 2397 } 2398 } 2399 2400 2401 void ieee802_1x_deinit(struct hostapd_data *hapd) 2402 { 2403 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL); 2404 2405 if (hapd->driver && hapd->drv_priv && 2406 (hapd->conf->ieee802_1x || hapd->conf->wpa)) 2407 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0); 2408 2409 eapol_auth_deinit(hapd->eapol_auth); 2410 hapd->eapol_auth = NULL; 2411 2412 ieee802_1x_erp_flush(hapd); 2413 } 2414 2415 2416 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 2417 const u8 *buf, size_t len, int ack) 2418 { 2419 struct ieee80211_hdr *hdr; 2420 u8 *pos; 2421 const unsigned char rfc1042_hdr[ETH_ALEN] = 2422 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 2423 2424 if (sta == NULL) 2425 return -1; 2426 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2) 2427 return 0; 2428 2429 hdr = (struct ieee80211_hdr *) buf; 2430 pos = (u8 *) (hdr + 1); 2431 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0) 2432 return 0; 2433 pos += sizeof(rfc1042_hdr); 2434 if (WPA_GET_BE16(pos) != ETH_P_PAE) 2435 return 0; 2436 pos += 2; 2437 2438 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos, 2439 ack); 2440 } 2441 2442 2443 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 2444 const u8 *buf, int len, int ack) 2445 { 2446 const struct ieee802_1x_hdr *xhdr = 2447 (const struct ieee802_1x_hdr *) buf; 2448 const u8 *pos = buf + sizeof(*xhdr); 2449 struct ieee802_1x_eapol_key *key; 2450 2451 if (len < (int) sizeof(*xhdr)) 2452 return 0; 2453 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d " 2454 "type=%d length=%d - ack=%d", 2455 MAC2STR(sta->addr), xhdr->version, xhdr->type, 2456 be_to_host16(xhdr->length), ack); 2457 2458 #ifdef CONFIG_WPS 2459 if (xhdr->type == IEEE802_1X_TYPE_EAP_PACKET && ack && 2460 (sta->flags & WLAN_STA_WPS) && 2461 ap_sta_pending_delayed_1x_auth_fail_disconnect(hapd, sta)) { 2462 wpa_printf(MSG_DEBUG, 2463 "WPS: Indicate EAP completion on ACK for EAP-Failure"); 2464 hostapd_wps_eap_completed(hapd); 2465 } 2466 #endif /* CONFIG_WPS */ 2467 2468 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY) 2469 return 0; 2470 2471 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) { 2472 const struct wpa_eapol_key *wpa; 2473 wpa = (const struct wpa_eapol_key *) pos; 2474 if (wpa->type == EAPOL_KEY_TYPE_RSN || 2475 wpa->type == EAPOL_KEY_TYPE_WPA) 2476 wpa_auth_eapol_key_tx_status(hapd->wpa_auth, 2477 sta->wpa_sm, ack); 2478 } 2479 2480 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant 2481 * or Authenticator state machines, but EAPOL-Key packets are not 2482 * retransmitted in case of failure. Try to re-send failed EAPOL-Key 2483 * packets couple of times because otherwise STA keys become 2484 * unsynchronized with AP. */ 2485 if (!ack && pos + sizeof(*key) <= buf + len) { 2486 key = (struct ieee802_1x_eapol_key *) pos; 2487 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 2488 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key " 2489 "frame (%scast index=%d)", 2490 key->key_index & BIT(7) ? "uni" : "broad", 2491 key->key_index & ~BIT(7)); 2492 /* TODO: re-send EAPOL-Key couple of times (with short delay 2493 * between them?). If all attempt fail, report error and 2494 * deauthenticate STA so that it will get new keys when 2495 * authenticating again (e.g., after returning in range). 2496 * Separate limit/transmit state needed both for unicast and 2497 * broadcast keys(?) */ 2498 } 2499 /* TODO: could move unicast key configuration from ieee802_1x_tx_key() 2500 * to here and change the key only if the EAPOL-Key packet was Acked. 2501 */ 2502 2503 return 1; 2504 } 2505 2506 2507 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len) 2508 { 2509 if (sm == NULL || sm->identity == NULL) 2510 return NULL; 2511 2512 *len = sm->identity_len; 2513 return sm->identity; 2514 } 2515 2516 2517 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len, 2518 int idx) 2519 { 2520 if (sm == NULL || sm->radius_class.attr == NULL || 2521 idx >= (int) sm->radius_class.count) 2522 return NULL; 2523 2524 *len = sm->radius_class.attr[idx].len; 2525 return sm->radius_class.attr[idx].data; 2526 } 2527 2528 2529 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm) 2530 { 2531 if (sm == NULL) 2532 return NULL; 2533 return sm->radius_cui; 2534 } 2535 2536 2537 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len) 2538 { 2539 *len = 0; 2540 if (sm == NULL) 2541 return NULL; 2542 2543 *len = sm->eap_if->eapKeyDataLen; 2544 return sm->eap_if->eapKeyData; 2545 } 2546 2547 2548 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm, 2549 int enabled) 2550 { 2551 if (sm == NULL) 2552 return; 2553 sm->eap_if->portEnabled = enabled ? TRUE : FALSE; 2554 eapol_auth_step(sm); 2555 } 2556 2557 2558 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, 2559 int valid) 2560 { 2561 if (sm == NULL) 2562 return; 2563 sm->portValid = valid ? TRUE : FALSE; 2564 eapol_auth_step(sm); 2565 } 2566 2567 2568 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth) 2569 { 2570 if (sm == NULL) 2571 return; 2572 if (pre_auth) 2573 sm->flags |= EAPOL_SM_PREAUTH; 2574 else 2575 sm->flags &= ~EAPOL_SM_PREAUTH; 2576 } 2577 2578 2579 static const char * bool_txt(Boolean val) 2580 { 2581 return val ? "TRUE" : "FALSE"; 2582 } 2583 2584 2585 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 2586 { 2587 /* TODO */ 2588 return 0; 2589 } 2590 2591 2592 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 2593 char *buf, size_t buflen) 2594 { 2595 int len = 0, ret; 2596 struct eapol_state_machine *sm = sta->eapol_sm; 2597 struct os_reltime diff; 2598 const char *name1; 2599 const char *name2; 2600 2601 if (sm == NULL) 2602 return 0; 2603 2604 ret = os_snprintf(buf + len, buflen - len, 2605 "dot1xPaePortNumber=%d\n" 2606 "dot1xPaePortProtocolVersion=%d\n" 2607 "dot1xPaePortCapabilities=1\n" 2608 "dot1xPaePortInitialize=%d\n" 2609 "dot1xPaePortReauthenticate=FALSE\n", 2610 sta->aid, 2611 EAPOL_VERSION, 2612 sm->initialize); 2613 if (os_snprintf_error(buflen - len, ret)) 2614 return len; 2615 len += ret; 2616 2617 /* dot1xAuthConfigTable */ 2618 ret = os_snprintf(buf + len, buflen - len, 2619 "dot1xAuthPaeState=%d\n" 2620 "dot1xAuthBackendAuthState=%d\n" 2621 "dot1xAuthAdminControlledDirections=%d\n" 2622 "dot1xAuthOperControlledDirections=%d\n" 2623 "dot1xAuthAuthControlledPortStatus=%d\n" 2624 "dot1xAuthAuthControlledPortControl=%d\n" 2625 "dot1xAuthQuietPeriod=%u\n" 2626 "dot1xAuthServerTimeout=%u\n" 2627 "dot1xAuthReAuthPeriod=%u\n" 2628 "dot1xAuthReAuthEnabled=%s\n" 2629 "dot1xAuthKeyTxEnabled=%s\n", 2630 sm->auth_pae_state + 1, 2631 sm->be_auth_state + 1, 2632 sm->adminControlledDirections, 2633 sm->operControlledDirections, 2634 sm->authPortStatus, 2635 sm->portControl, 2636 sm->quietPeriod, 2637 sm->serverTimeout, 2638 sm->reAuthPeriod, 2639 bool_txt(sm->reAuthEnabled), 2640 bool_txt(sm->keyTxEnabled)); 2641 if (os_snprintf_error(buflen - len, ret)) 2642 return len; 2643 len += ret; 2644 2645 /* dot1xAuthStatsTable */ 2646 ret = os_snprintf(buf + len, buflen - len, 2647 "dot1xAuthEapolFramesRx=%u\n" 2648 "dot1xAuthEapolFramesTx=%u\n" 2649 "dot1xAuthEapolStartFramesRx=%u\n" 2650 "dot1xAuthEapolLogoffFramesRx=%u\n" 2651 "dot1xAuthEapolRespIdFramesRx=%u\n" 2652 "dot1xAuthEapolRespFramesRx=%u\n" 2653 "dot1xAuthEapolReqIdFramesTx=%u\n" 2654 "dot1xAuthEapolReqFramesTx=%u\n" 2655 "dot1xAuthInvalidEapolFramesRx=%u\n" 2656 "dot1xAuthEapLengthErrorFramesRx=%u\n" 2657 "dot1xAuthLastEapolFrameVersion=%u\n" 2658 "dot1xAuthLastEapolFrameSource=" MACSTR "\n", 2659 sm->dot1xAuthEapolFramesRx, 2660 sm->dot1xAuthEapolFramesTx, 2661 sm->dot1xAuthEapolStartFramesRx, 2662 sm->dot1xAuthEapolLogoffFramesRx, 2663 sm->dot1xAuthEapolRespIdFramesRx, 2664 sm->dot1xAuthEapolRespFramesRx, 2665 sm->dot1xAuthEapolReqIdFramesTx, 2666 sm->dot1xAuthEapolReqFramesTx, 2667 sm->dot1xAuthInvalidEapolFramesRx, 2668 sm->dot1xAuthEapLengthErrorFramesRx, 2669 sm->dot1xAuthLastEapolFrameVersion, 2670 MAC2STR(sm->addr)); 2671 if (os_snprintf_error(buflen - len, ret)) 2672 return len; 2673 len += ret; 2674 2675 /* dot1xAuthDiagTable */ 2676 ret = os_snprintf(buf + len, buflen - len, 2677 "dot1xAuthEntersConnecting=%u\n" 2678 "dot1xAuthEapLogoffsWhileConnecting=%u\n" 2679 "dot1xAuthEntersAuthenticating=%u\n" 2680 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n" 2681 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n" 2682 "dot1xAuthAuthFailWhileAuthenticating=%u\n" 2683 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n" 2684 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n" 2685 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n" 2686 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n" 2687 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n" 2688 "dot1xAuthBackendResponses=%u\n" 2689 "dot1xAuthBackendAccessChallenges=%u\n" 2690 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n" 2691 "dot1xAuthBackendAuthSuccesses=%u\n" 2692 "dot1xAuthBackendAuthFails=%u\n", 2693 sm->authEntersConnecting, 2694 sm->authEapLogoffsWhileConnecting, 2695 sm->authEntersAuthenticating, 2696 sm->authAuthSuccessesWhileAuthenticating, 2697 sm->authAuthTimeoutsWhileAuthenticating, 2698 sm->authAuthFailWhileAuthenticating, 2699 sm->authAuthEapStartsWhileAuthenticating, 2700 sm->authAuthEapLogoffWhileAuthenticating, 2701 sm->authAuthReauthsWhileAuthenticated, 2702 sm->authAuthEapStartsWhileAuthenticated, 2703 sm->authAuthEapLogoffWhileAuthenticated, 2704 sm->backendResponses, 2705 sm->backendAccessChallenges, 2706 sm->backendOtherRequestsToSupplicant, 2707 sm->backendAuthSuccesses, 2708 sm->backendAuthFails); 2709 if (os_snprintf_error(buflen - len, ret)) 2710 return len; 2711 len += ret; 2712 2713 /* dot1xAuthSessionStatsTable */ 2714 os_reltime_age(&sta->acct_session_start, &diff); 2715 ret = os_snprintf(buf + len, buflen - len, 2716 /* TODO: dot1xAuthSessionOctetsRx */ 2717 /* TODO: dot1xAuthSessionOctetsTx */ 2718 /* TODO: dot1xAuthSessionFramesRx */ 2719 /* TODO: dot1xAuthSessionFramesTx */ 2720 "dot1xAuthSessionId=%016llX\n" 2721 "dot1xAuthSessionAuthenticMethod=%d\n" 2722 "dot1xAuthSessionTime=%u\n" 2723 "dot1xAuthSessionTerminateCause=999\n" 2724 "dot1xAuthSessionUserName=%s\n", 2725 (unsigned long long) sta->acct_session_id, 2726 (wpa_key_mgmt_wpa_ieee8021x( 2727 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ? 2728 1 : 2, 2729 (unsigned int) diff.sec, 2730 sm->identity); 2731 if (os_snprintf_error(buflen - len, ret)) 2732 return len; 2733 len += ret; 2734 2735 if (sm->acct_multi_session_id) { 2736 ret = os_snprintf(buf + len, buflen - len, 2737 "authMultiSessionId=%016llX\n", 2738 (unsigned long long) 2739 sm->acct_multi_session_id); 2740 if (os_snprintf_error(buflen - len, ret)) 2741 return len; 2742 len += ret; 2743 } 2744 2745 name1 = eap_server_get_name(0, sm->eap_type_authsrv); 2746 name2 = eap_server_get_name(0, sm->eap_type_supp); 2747 ret = os_snprintf(buf + len, buflen - len, 2748 "last_eap_type_as=%d (%s)\n" 2749 "last_eap_type_sta=%d (%s)\n", 2750 sm->eap_type_authsrv, name1, 2751 sm->eap_type_supp, name2); 2752 if (os_snprintf_error(buflen - len, ret)) 2753 return len; 2754 len += ret; 2755 2756 return len; 2757 } 2758 2759 2760 #ifdef CONFIG_HS20 2761 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx) 2762 { 2763 struct hostapd_data *hapd = eloop_ctx; 2764 struct sta_info *sta = timeout_ctx; 2765 2766 if (sta->remediation) { 2767 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2768 MACSTR " to indicate Subscription Remediation", 2769 MAC2STR(sta->addr)); 2770 hs20_send_wnm_notification(hapd, sta->addr, 2771 sta->remediation_method, 2772 sta->remediation_url); 2773 os_free(sta->remediation_url); 2774 sta->remediation_url = NULL; 2775 } 2776 2777 if (sta->hs20_deauth_req) { 2778 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2779 MACSTR " to indicate imminent deauthentication", 2780 MAC2STR(sta->addr)); 2781 hs20_send_wnm_notification_deauth_req(hapd, sta->addr, 2782 sta->hs20_deauth_req); 2783 } 2784 2785 if (sta->hs20_t_c_filtering) { 2786 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to " 2787 MACSTR " to indicate Terms and Conditions filtering", 2788 MAC2STR(sta->addr)); 2789 hs20_send_wnm_notification_t_c(hapd, sta->addr, sta->t_c_url); 2790 os_free(sta->t_c_url); 2791 sta->t_c_url = NULL; 2792 } 2793 } 2794 #endif /* CONFIG_HS20 */ 2795 2796 2797 static void ieee802_1x_finished(struct hostapd_data *hapd, 2798 struct sta_info *sta, int success, 2799 int remediation) 2800 { 2801 const u8 *key; 2802 size_t len; 2803 /* TODO: get PMKLifetime from WPA parameters */ 2804 static const int dot11RSNAConfigPMKLifetime = 43200; 2805 unsigned int session_timeout; 2806 struct os_reltime now, remaining; 2807 2808 #ifdef CONFIG_HS20 2809 if (remediation && !sta->remediation) { 2810 sta->remediation = 1; 2811 os_free(sta->remediation_url); 2812 sta->remediation_url = 2813 os_strdup(hapd->conf->subscr_remediation_url); 2814 sta->remediation_method = 1; /* SOAP-XML SPP */ 2815 } 2816 2817 if (success && (sta->remediation || sta->hs20_deauth_req || 2818 sta->hs20_t_c_filtering)) { 2819 wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to " 2820 MACSTR " in 100 ms", MAC2STR(sta->addr)); 2821 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta); 2822 eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send, 2823 hapd, sta); 2824 } 2825 #endif /* CONFIG_HS20 */ 2826 2827 key = ieee802_1x_get_key(sta->eapol_sm, &len); 2828 if (sta->session_timeout_set) { 2829 os_get_reltime(&now); 2830 os_reltime_sub(&sta->session_timeout, &now, &remaining); 2831 session_timeout = (remaining.sec > 0) ? remaining.sec : 1; 2832 } else { 2833 session_timeout = dot11RSNAConfigPMKLifetime; 2834 } 2835 if (success && key && len >= PMK_LEN && !sta->remediation && 2836 !sta->hs20_deauth_requested && 2837 wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout, 2838 sta->eapol_sm) == 0) { 2839 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 2840 HOSTAPD_LEVEL_DEBUG, 2841 "Added PMKSA cache entry (IEEE 802.1X)"); 2842 } 2843 2844 if (!success) { 2845 /* 2846 * Many devices require deauthentication after WPS provisioning 2847 * and some may not be be able to do that themselves, so 2848 * disconnect the client here. In addition, this may also 2849 * benefit IEEE 802.1X/EAPOL authentication cases, too since 2850 * the EAPOL PAE state machine would remain in HELD state for 2851 * considerable amount of time and some EAP methods, like 2852 * EAP-FAST with anonymous provisioning, may require another 2853 * EAPOL authentication to be started to complete connection. 2854 */ 2855 ap_sta_delayed_1x_auth_fail_disconnect(hapd, sta); 2856 } 2857 } 2858