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