ieee802_1x.c revision 5393a0f77c5281735888bd9dcf8d8abeb5961461
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 "ieee802_1x.h" 33 34 35static void ieee802_1x_finished(struct hostapd_data *hapd, 36 struct sta_info *sta, int success); 37 38 39static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta, 40 u8 type, const u8 *data, size_t datalen) 41{ 42 u8 *buf; 43 struct ieee802_1x_hdr *xhdr; 44 size_t len; 45 int encrypt = 0; 46 47 len = sizeof(*xhdr) + datalen; 48 buf = os_zalloc(len); 49 if (buf == NULL) { 50 wpa_printf(MSG_ERROR, "malloc() failed for " 51 "ieee802_1x_send(len=%lu)", 52 (unsigned long) len); 53 return; 54 } 55 56 xhdr = (struct ieee802_1x_hdr *) buf; 57 xhdr->version = hapd->conf->eapol_version; 58 xhdr->type = type; 59 xhdr->length = host_to_be16(datalen); 60 61 if (datalen > 0 && data != NULL) 62 os_memcpy(xhdr + 1, data, datalen); 63 64 if (wpa_auth_pairwise_set(sta->wpa_sm)) 65 encrypt = 1; 66 if (sta->flags & WLAN_STA_PREAUTH) { 67 rsn_preauth_send(hapd, sta, buf, len); 68 } else { 69 hostapd_drv_hapd_send_eapol( 70 hapd, sta->addr, buf, len, 71 encrypt, hostapd_sta_flags_to_drv(sta->flags)); 72 } 73 74 os_free(buf); 75} 76 77 78void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd, 79 struct sta_info *sta, int authorized) 80{ 81 int res; 82 83 if (sta->flags & WLAN_STA_PREAUTH) 84 return; 85 86 if (authorized) { 87 ap_sta_set_authorized(hapd, sta, 1); 88 res = hostapd_set_authorized(hapd, sta, 1); 89 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 90 HOSTAPD_LEVEL_DEBUG, "authorizing port"); 91 } else { 92 ap_sta_set_authorized(hapd, sta, 0); 93 res = hostapd_set_authorized(hapd, sta, 0); 94 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 95 HOSTAPD_LEVEL_DEBUG, "unauthorizing port"); 96 } 97 98 if (res && errno != ENOENT) { 99 printf("Could not set station " MACSTR " flags for kernel " 100 "driver (errno=%d).\n", MAC2STR(sta->addr), errno); 101 } 102 103 if (authorized) { 104 os_get_time(&sta->connected_time); 105 accounting_sta_start(hapd, sta); 106 } 107} 108 109 110static void ieee802_1x_tx_key_one(struct hostapd_data *hapd, 111 struct sta_info *sta, 112 int idx, int broadcast, 113 u8 *key_data, size_t key_len) 114{ 115 u8 *buf, *ekey; 116 struct ieee802_1x_hdr *hdr; 117 struct ieee802_1x_eapol_key *key; 118 size_t len, ekey_len; 119 struct eapol_state_machine *sm = sta->eapol_sm; 120 121 if (sm == NULL) 122 return; 123 124 len = sizeof(*key) + key_len; 125 buf = os_zalloc(sizeof(*hdr) + len); 126 if (buf == NULL) 127 return; 128 129 hdr = (struct ieee802_1x_hdr *) buf; 130 key = (struct ieee802_1x_eapol_key *) (hdr + 1); 131 key->type = EAPOL_KEY_TYPE_RC4; 132 WPA_PUT_BE16(key->key_length, key_len); 133 wpa_get_ntp_timestamp(key->replay_counter); 134 135 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) { 136 wpa_printf(MSG_ERROR, "Could not get random numbers"); 137 os_free(buf); 138 return; 139 } 140 141 key->key_index = idx | (broadcast ? 0 : BIT(7)); 142 if (hapd->conf->eapol_key_index_workaround) { 143 /* According to some information, WinXP Supplicant seems to 144 * interpret bit7 as an indication whether the key is to be 145 * activated, so make it possible to enable workaround that 146 * sets this bit for all keys. */ 147 key->key_index |= BIT(7); 148 } 149 150 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and 151 * MSK[32..63] is used to sign the message. */ 152 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) { 153 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting " 154 "and signing EAPOL-Key"); 155 os_free(buf); 156 return; 157 } 158 os_memcpy((u8 *) (key + 1), key_data, key_len); 159 ekey_len = sizeof(key->key_iv) + 32; 160 ekey = os_malloc(ekey_len); 161 if (ekey == NULL) { 162 wpa_printf(MSG_ERROR, "Could not encrypt key"); 163 os_free(buf); 164 return; 165 } 166 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv)); 167 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32); 168 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len); 169 os_free(ekey); 170 171 /* This header is needed here for HMAC-MD5, but it will be regenerated 172 * in ieee802_1x_send() */ 173 hdr->version = hapd->conf->eapol_version; 174 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY; 175 hdr->length = host_to_be16(len); 176 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len, 177 key->key_signature); 178 179 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR 180 " (%s index=%d)", MAC2STR(sm->addr), 181 broadcast ? "broadcast" : "unicast", idx); 182 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len); 183 if (sta->eapol_sm) 184 sta->eapol_sm->dot1xAuthEapolFramesTx++; 185 os_free(buf); 186} 187 188 189void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta) 190{ 191 struct eapol_authenticator *eapol = hapd->eapol_auth; 192 struct eapol_state_machine *sm = sta->eapol_sm; 193 194 if (sm == NULL || !sm->eap_if->eapKeyData) 195 return; 196 197 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR, 198 MAC2STR(sta->addr)); 199 200#ifndef CONFIG_NO_VLAN 201 if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) { 202 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported."); 203 return; 204 } 205#endif /* CONFIG_NO_VLAN */ 206 207 if (eapol->default_wep_key) { 208 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1, 209 eapol->default_wep_key, 210 hapd->conf->default_wep_key_len); 211 } 212 213 if (hapd->conf->individual_wep_key_len > 0) { 214 u8 *ikey; 215 ikey = os_malloc(hapd->conf->individual_wep_key_len); 216 if (ikey == NULL || 217 random_get_bytes(ikey, hapd->conf->individual_wep_key_len)) 218 { 219 wpa_printf(MSG_ERROR, "Could not generate random " 220 "individual WEP key."); 221 os_free(ikey); 222 return; 223 } 224 225 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key", 226 ikey, hapd->conf->individual_wep_key_len); 227 228 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey, 229 hapd->conf->individual_wep_key_len); 230 231 /* TODO: set encryption in TX callback, i.e., only after STA 232 * has ACKed EAPOL-Key frame */ 233 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, 234 sta->addr, 0, 1, NULL, 0, ikey, 235 hapd->conf->individual_wep_key_len)) { 236 wpa_printf(MSG_ERROR, "Could not set individual WEP " 237 "encryption."); 238 } 239 240 os_free(ikey); 241 } 242} 243 244 245const char *radius_mode_txt(struct hostapd_data *hapd) 246{ 247 switch (hapd->iface->conf->hw_mode) { 248 case HOSTAPD_MODE_IEEE80211AD: 249 return "802.11ad"; 250 case HOSTAPD_MODE_IEEE80211A: 251 return "802.11a"; 252 case HOSTAPD_MODE_IEEE80211G: 253 return "802.11g"; 254 case HOSTAPD_MODE_IEEE80211B: 255 default: 256 return "802.11b"; 257 } 258} 259 260 261int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta) 262{ 263 int i; 264 u8 rate = 0; 265 266 for (i = 0; i < sta->supported_rates_len; i++) 267 if ((sta->supported_rates[i] & 0x7f) > rate) 268 rate = sta->supported_rates[i] & 0x7f; 269 270 return rate; 271} 272 273 274#ifndef CONFIG_NO_RADIUS 275static void ieee802_1x_learn_identity(struct hostapd_data *hapd, 276 struct eapol_state_machine *sm, 277 const u8 *eap, size_t len) 278{ 279 const u8 *identity; 280 size_t identity_len; 281 282 if (len <= sizeof(struct eap_hdr) || 283 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) 284 return; 285 286 identity = eap_get_identity(sm->eap, &identity_len); 287 if (identity == NULL) 288 return; 289 290 /* Save station identity for future RADIUS packets */ 291 os_free(sm->identity); 292 sm->identity = (u8 *) dup_binstr(identity, identity_len); 293 if (sm->identity == NULL) { 294 sm->identity_len = 0; 295 return; 296 } 297 298 sm->identity_len = identity_len; 299 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 300 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity); 301 sm->dot1xAuthEapolRespIdFramesRx++; 302} 303 304 305static int add_common_radius_sta_attr(struct hostapd_data *hapd, 306 struct hostapd_radius_attr *req_attr, 307 struct sta_info *sta, 308 struct radius_msg *msg) 309{ 310 char buf[128]; 311 312 if (!hostapd_config_get_radius_attr(req_attr, 313 RADIUS_ATTR_NAS_PORT) && 314 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) { 315 wpa_printf(MSG_ERROR, "Could not add NAS-Port"); 316 return -1; 317 } 318 319 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT, 320 MAC2STR(sta->addr)); 321 buf[sizeof(buf) - 1] = '\0'; 322 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID, 323 (u8 *) buf, os_strlen(buf))) { 324 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id"); 325 return -1; 326 } 327 328 if (sta->flags & WLAN_STA_PREAUTH) { 329 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication", 330 sizeof(buf)); 331 } else { 332 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s", 333 radius_sta_rate(hapd, sta) / 2, 334 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "", 335 radius_mode_txt(hapd)); 336 buf[sizeof(buf) - 1] = '\0'; 337 } 338 if (!hostapd_config_get_radius_attr(req_attr, 339 RADIUS_ATTR_CONNECT_INFO) && 340 !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO, 341 (u8 *) buf, os_strlen(buf))) { 342 wpa_printf(MSG_ERROR, "Could not add Connect-Info"); 343 return -1; 344 } 345 346 if (sta->acct_session_id_hi || sta->acct_session_id_lo) { 347 os_snprintf(buf, sizeof(buf), "%08X-%08X", 348 sta->acct_session_id_hi, sta->acct_session_id_lo); 349 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID, 350 (u8 *) buf, os_strlen(buf))) { 351 wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id"); 352 return -1; 353 } 354 } 355 356 return 0; 357} 358 359 360int add_common_radius_attr(struct hostapd_data *hapd, 361 struct hostapd_radius_attr *req_attr, 362 struct sta_info *sta, 363 struct radius_msg *msg) 364{ 365 char buf[128]; 366 struct hostapd_radius_attr *attr; 367 368 if (!hostapd_config_get_radius_attr(req_attr, 369 RADIUS_ATTR_NAS_IP_ADDRESS) && 370 hapd->conf->own_ip_addr.af == AF_INET && 371 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS, 372 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) { 373 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address"); 374 return -1; 375 } 376 377#ifdef CONFIG_IPV6 378 if (!hostapd_config_get_radius_attr(req_attr, 379 RADIUS_ATTR_NAS_IPV6_ADDRESS) && 380 hapd->conf->own_ip_addr.af == AF_INET6 && 381 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS, 382 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) { 383 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address"); 384 return -1; 385 } 386#endif /* CONFIG_IPV6 */ 387 388 if (!hostapd_config_get_radius_attr(req_attr, 389 RADIUS_ATTR_NAS_IDENTIFIER) && 390 hapd->conf->nas_identifier && 391 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER, 392 (u8 *) hapd->conf->nas_identifier, 393 os_strlen(hapd->conf->nas_identifier))) { 394 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier"); 395 return -1; 396 } 397 398 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s", 399 MAC2STR(hapd->own_addr), 400 wpa_ssid_txt(hapd->conf->ssid.ssid, 401 hapd->conf->ssid.ssid_len)); 402 buf[sizeof(buf) - 1] = '\0'; 403 if (!hostapd_config_get_radius_attr(req_attr, 404 RADIUS_ATTR_CALLED_STATION_ID) && 405 !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID, 406 (u8 *) buf, os_strlen(buf))) { 407 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id"); 408 return -1; 409 } 410 411 if (!hostapd_config_get_radius_attr(req_attr, 412 RADIUS_ATTR_NAS_PORT_TYPE) && 413 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE, 414 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) { 415 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type"); 416 return -1; 417 } 418 419 if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0) 420 return -1; 421 422 for (attr = req_attr; attr; attr = attr->next) { 423 if (!radius_msg_add_attr(msg, attr->type, 424 wpabuf_head(attr->val), 425 wpabuf_len(attr->val))) { 426 wpa_printf(MSG_ERROR, "Could not add RADIUS " 427 "attribute"); 428 return -1; 429 } 430 } 431 432 return 0; 433} 434 435 436static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd, 437 struct sta_info *sta, 438 const u8 *eap, size_t len) 439{ 440 struct radius_msg *msg; 441 struct eapol_state_machine *sm = sta->eapol_sm; 442 443 if (sm == NULL) 444 return; 445 446 ieee802_1x_learn_identity(hapd, sm, eap, len); 447 448 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS " 449 "packet"); 450 451 sm->radius_identifier = radius_client_get_id(hapd->radius); 452 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, 453 sm->radius_identifier); 454 if (msg == NULL) { 455 printf("Could not create net RADIUS packet\n"); 456 return; 457 } 458 459 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta)); 460 461 if (sm->identity && 462 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, 463 sm->identity, sm->identity_len)) { 464 printf("Could not add User-Name\n"); 465 goto fail; 466 } 467 468 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta, 469 msg) < 0) 470 goto fail; 471 472 /* TODO: should probably check MTU from driver config; 2304 is max for 473 * IEEE 802.11, but use 1400 to avoid problems with too large packets 474 */ 475 if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr, 476 RADIUS_ATTR_FRAMED_MTU) && 477 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) { 478 printf("Could not add Framed-MTU\n"); 479 goto fail; 480 } 481 482 if (eap && !radius_msg_add_eap(msg, eap, len)) { 483 printf("Could not add EAP-Message\n"); 484 goto fail; 485 } 486 487 /* State attribute must be copied if and only if this packet is 488 * Access-Request reply to the previous Access-Challenge */ 489 if (sm->last_recv_radius && 490 radius_msg_get_hdr(sm->last_recv_radius)->code == 491 RADIUS_CODE_ACCESS_CHALLENGE) { 492 int res = radius_msg_copy_attr(msg, sm->last_recv_radius, 493 RADIUS_ATTR_STATE); 494 if (res < 0) { 495 printf("Could not copy State attribute from previous " 496 "Access-Challenge\n"); 497 goto fail; 498 } 499 if (res > 0) { 500 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute"); 501 } 502 } 503 504 if (hapd->conf->radius_request_cui) { 505 const u8 *cui; 506 size_t cui_len; 507 /* Add previously learned CUI or nul CUI to request CUI */ 508 if (sm->radius_cui) { 509 cui = wpabuf_head(sm->radius_cui); 510 cui_len = wpabuf_len(sm->radius_cui); 511 } else { 512 cui = (const u8 *) "\0"; 513 cui_len = 1; 514 } 515 if (!radius_msg_add_attr(msg, 516 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, 517 cui, cui_len)) { 518 wpa_printf(MSG_ERROR, "Could not add CUI"); 519 goto fail; 520 } 521 } 522 523 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0) 524 goto fail; 525 526 return; 527 528 fail: 529 radius_msg_free(msg); 530} 531#endif /* CONFIG_NO_RADIUS */ 532 533 534static void handle_eap_response(struct hostapd_data *hapd, 535 struct sta_info *sta, struct eap_hdr *eap, 536 size_t len) 537{ 538 u8 type, *data; 539 struct eapol_state_machine *sm = sta->eapol_sm; 540 if (sm == NULL) 541 return; 542 543 data = (u8 *) (eap + 1); 544 545 if (len < sizeof(*eap) + 1) { 546 printf("handle_eap_response: too short response data\n"); 547 return; 548 } 549 550 sm->eap_type_supp = type = data[0]; 551 552 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X, 553 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d " 554 "id=%d len=%d) from STA: EAP Response-%s (%d)", 555 eap->code, eap->identifier, be_to_host16(eap->length), 556 eap_server_get_name(0, type), type); 557 558 sm->dot1xAuthEapolRespFramesRx++; 559 560 wpabuf_free(sm->eap_if->eapRespData); 561 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len); 562 sm->eapolEap = TRUE; 563} 564 565 566/* Process incoming EAP packet from Supplicant */ 567static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta, 568 u8 *buf, size_t len) 569{ 570 struct eap_hdr *eap; 571 u16 eap_len; 572 573 if (len < sizeof(*eap)) { 574 printf(" too short EAP packet\n"); 575 return; 576 } 577 578 eap = (struct eap_hdr *) buf; 579 580 eap_len = be_to_host16(eap->length); 581 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d", 582 eap->code, eap->identifier, eap_len); 583 if (eap_len < sizeof(*eap)) { 584 wpa_printf(MSG_DEBUG, " Invalid EAP length"); 585 return; 586 } else if (eap_len > len) { 587 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP " 588 "packet"); 589 return; 590 } else if (eap_len < len) { 591 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP " 592 "packet", (unsigned long) len - eap_len); 593 } 594 595 switch (eap->code) { 596 case EAP_CODE_REQUEST: 597 wpa_printf(MSG_DEBUG, " (request)"); 598 return; 599 case EAP_CODE_RESPONSE: 600 wpa_printf(MSG_DEBUG, " (response)"); 601 handle_eap_response(hapd, sta, eap, eap_len); 602 break; 603 case EAP_CODE_SUCCESS: 604 wpa_printf(MSG_DEBUG, " (success)"); 605 return; 606 case EAP_CODE_FAILURE: 607 wpa_printf(MSG_DEBUG, " (failure)"); 608 return; 609 default: 610 wpa_printf(MSG_DEBUG, " (unknown code)"); 611 return; 612 } 613} 614 615 616static struct eapol_state_machine * 617ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta) 618{ 619 int flags = 0; 620 if (sta->flags & WLAN_STA_PREAUTH) 621 flags |= EAPOL_SM_PREAUTH; 622 if (sta->wpa_sm) { 623 flags |= EAPOL_SM_USES_WPA; 624 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) 625 flags |= EAPOL_SM_FROM_PMKSA_CACHE; 626 } 627 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags, 628 sta->wps_ie, sta->p2p_ie, sta, 629 sta->identity, sta->radius_cui); 630} 631 632 633/** 634 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant 635 * @hapd: hostapd BSS data 636 * @sa: Source address (sender of the EAPOL frame) 637 * @buf: EAPOL frame 638 * @len: Length of buf in octets 639 * 640 * This function is called for each incoming EAPOL frame from the interface 641 */ 642void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf, 643 size_t len) 644{ 645 struct sta_info *sta; 646 struct ieee802_1x_hdr *hdr; 647 struct ieee802_1x_eapol_key *key; 648 u16 datalen; 649 struct rsn_pmksa_cache_entry *pmksa; 650 int key_mgmt; 651 652 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && 653 !hapd->conf->wps_state) 654 return; 655 656 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR, 657 (unsigned long) len, MAC2STR(sa)); 658 sta = ap_get_sta(hapd, sa); 659 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) && 660 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) { 661 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not " 662 "associated/Pre-authenticating STA"); 663 return; 664 } 665 666 if (len < sizeof(*hdr)) { 667 printf(" too short IEEE 802.1X packet\n"); 668 return; 669 } 670 671 hdr = (struct ieee802_1x_hdr *) buf; 672 datalen = be_to_host16(hdr->length); 673 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d", 674 hdr->version, hdr->type, datalen); 675 676 if (len - sizeof(*hdr) < datalen) { 677 printf(" frame too short for this IEEE 802.1X packet\n"); 678 if (sta->eapol_sm) 679 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++; 680 return; 681 } 682 if (len - sizeof(*hdr) > datalen) { 683 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after " 684 "IEEE 802.1X packet", 685 (unsigned long) len - sizeof(*hdr) - datalen); 686 } 687 688 if (sta->eapol_sm) { 689 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version; 690 sta->eapol_sm->dot1xAuthEapolFramesRx++; 691 } 692 693 key = (struct ieee802_1x_eapol_key *) (hdr + 1); 694 if (datalen >= sizeof(struct ieee802_1x_eapol_key) && 695 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY && 696 (key->type == EAPOL_KEY_TYPE_WPA || 697 key->type == EAPOL_KEY_TYPE_RSN)) { 698 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr, 699 sizeof(*hdr) + datalen); 700 return; 701 } 702 703 if (!hapd->conf->ieee802_1x && 704 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) { 705 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 706 "802.1X not enabled and WPS not used"); 707 return; 708 } 709 710 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 711 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) { 712 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - " 713 "STA is using PSK"); 714 return; 715 } 716 717 if (!sta->eapol_sm) { 718 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 719 if (!sta->eapol_sm) 720 return; 721 722#ifdef CONFIG_WPS 723 if (!hapd->conf->ieee802_1x) { 724 u32 wflags = sta->flags & (WLAN_STA_WPS | 725 WLAN_STA_WPS2 | 726 WLAN_STA_MAYBE_WPS); 727 if (wflags == WLAN_STA_MAYBE_WPS || 728 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) { 729 /* 730 * Delay EAPOL frame transmission until a 731 * possible WPS STA initiates the handshake 732 * with EAPOL-Start. Only allow the wait to be 733 * skipped if the STA is known to support WPS 734 * 2.0. 735 */ 736 wpa_printf(MSG_DEBUG, "WPS: Do not start " 737 "EAPOL until EAPOL-Start is " 738 "received"); 739 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 740 } 741 } 742#endif /* CONFIG_WPS */ 743 744 sta->eapol_sm->eap_if->portEnabled = TRUE; 745 } 746 747 /* since we support version 1, we can ignore version field and proceed 748 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */ 749 /* TODO: actually, we are not version 1 anymore.. However, Version 2 750 * does not change frame contents, so should be ok to process frames 751 * more or less identically. Some changes might be needed for 752 * verification of fields. */ 753 754 switch (hdr->type) { 755 case IEEE802_1X_TYPE_EAP_PACKET: 756 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen); 757 break; 758 759 case IEEE802_1X_TYPE_EAPOL_START: 760 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 761 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start " 762 "from STA"); 763 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 764 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 765 if (pmksa) { 766 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 767 HOSTAPD_LEVEL_DEBUG, "cached PMKSA " 768 "available - ignore it since " 769 "STA sent EAPOL-Start"); 770 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa); 771 } 772 sta->eapol_sm->eapolStart = TRUE; 773 sta->eapol_sm->dot1xAuthEapolStartFramesRx++; 774 eap_server_clear_identity(sta->eapol_sm->eap); 775 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 776 break; 777 778 case IEEE802_1X_TYPE_EAPOL_LOGOFF: 779 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 780 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff " 781 "from STA"); 782 sta->acct_terminate_cause = 783 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; 784 accounting_sta_stop(hapd, sta); 785 sta->eapol_sm->eapolLogoff = TRUE; 786 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++; 787 eap_server_clear_identity(sta->eapol_sm->eap); 788 break; 789 790 case IEEE802_1X_TYPE_EAPOL_KEY: 791 wpa_printf(MSG_DEBUG, " EAPOL-Key"); 792 if (!ap_sta_is_authorized(sta)) { 793 wpa_printf(MSG_DEBUG, " Dropped key data from " 794 "unauthorized Supplicant"); 795 break; 796 } 797 break; 798 799 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT: 800 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert"); 801 /* TODO: implement support for this; show data */ 802 break; 803 804 default: 805 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type"); 806 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++; 807 break; 808 } 809 810 eapol_auth_step(sta->eapol_sm); 811} 812 813 814/** 815 * ieee802_1x_new_station - Start IEEE 802.1X authentication 816 * @hapd: hostapd BSS data 817 * @sta: The station 818 * 819 * This function is called to start IEEE 802.1X authentication when a new 820 * station completes IEEE 802.11 association. 821 */ 822void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta) 823{ 824 struct rsn_pmksa_cache_entry *pmksa; 825 int reassoc = 1; 826 int force_1x = 0; 827 int key_mgmt; 828 829#ifdef CONFIG_WPS 830 if (hapd->conf->wps_state && hapd->conf->wpa && 831 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) { 832 /* 833 * Need to enable IEEE 802.1X/EAPOL state machines for possible 834 * WPS handshake even if IEEE 802.1X/EAPOL is not used for 835 * authentication in this BSS. 836 */ 837 force_1x = 1; 838 } 839#endif /* CONFIG_WPS */ 840 841 if (!force_1x && !hapd->conf->ieee802_1x) { 842 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - " 843 "802.1X not enabled or forced for WPS"); 844 /* 845 * Clear any possible EAPOL authenticator state to support 846 * reassociation change from WPS to PSK. 847 */ 848 ieee802_1x_free_station(sta); 849 return; 850 } 851 852 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm); 853 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) { 854 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK"); 855 /* 856 * Clear any possible EAPOL authenticator state to support 857 * reassociation change from WPA-EAP to PSK. 858 */ 859 ieee802_1x_free_station(sta); 860 return; 861 } 862 863 if (sta->eapol_sm == NULL) { 864 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 865 HOSTAPD_LEVEL_DEBUG, "start authentication"); 866 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); 867 if (sta->eapol_sm == NULL) { 868 hostapd_logger(hapd, sta->addr, 869 HOSTAPD_MODULE_IEEE8021X, 870 HOSTAPD_LEVEL_INFO, 871 "failed to allocate state machine"); 872 return; 873 } 874 reassoc = 0; 875 } 876 877#ifdef CONFIG_WPS 878 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START; 879 if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS2)) { 880 /* 881 * Delay EAPOL frame transmission until a possible WPS STA 882 * initiates the handshake with EAPOL-Start. Only allow the 883 * wait to be skipped if the STA is known to support WPS 2.0. 884 */ 885 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until " 886 "EAPOL-Start is received"); 887 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START; 888 } 889#endif /* CONFIG_WPS */ 890 891 sta->eapol_sm->eap_if->portEnabled = TRUE; 892 893#ifdef CONFIG_IEEE80211R 894 if (sta->auth_alg == WLAN_AUTH_FT) { 895 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 896 HOSTAPD_LEVEL_DEBUG, 897 "PMK from FT - skip IEEE 802.1X/EAP"); 898 /* Setup EAPOL state machines to already authenticated state 899 * because of existing FT information from R0KH. */ 900 sta->eapol_sm->keyRun = TRUE; 901 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 902 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 903 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 904 sta->eapol_sm->authSuccess = TRUE; 905 sta->eapol_sm->authFail = FALSE; 906 if (sta->eapol_sm->eap) 907 eap_sm_notify_cached(sta->eapol_sm->eap); 908 /* TODO: get vlan_id from R0KH using RRB message */ 909 return; 910 } 911#endif /* CONFIG_IEEE80211R */ 912 913 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 914 if (pmksa) { 915 int old_vlanid; 916 917 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 918 HOSTAPD_LEVEL_DEBUG, 919 "PMK from PMKSA cache - skip IEEE 802.1X/EAP"); 920 /* Setup EAPOL state machines to already authenticated state 921 * because of existing PMKSA information in the cache. */ 922 sta->eapol_sm->keyRun = TRUE; 923 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 924 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING; 925 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS; 926 sta->eapol_sm->authSuccess = TRUE; 927 sta->eapol_sm->authFail = FALSE; 928 if (sta->eapol_sm->eap) 929 eap_sm_notify_cached(sta->eapol_sm->eap); 930 old_vlanid = sta->vlan_id; 931 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm); 932 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED) 933 sta->vlan_id = 0; 934 ap_sta_bind_vlan(hapd, sta, old_vlanid); 935 } else { 936 if (reassoc) { 937 /* 938 * Force EAPOL state machines to start 939 * re-authentication without having to wait for the 940 * Supplicant to send EAPOL-Start. 941 */ 942 sta->eapol_sm->reAuthenticate = TRUE; 943 } 944 eapol_auth_step(sta->eapol_sm); 945 } 946} 947 948 949void ieee802_1x_free_station(struct sta_info *sta) 950{ 951 struct eapol_state_machine *sm = sta->eapol_sm; 952 953 if (sm == NULL) 954 return; 955 956 sta->eapol_sm = NULL; 957 958#ifndef CONFIG_NO_RADIUS 959 radius_msg_free(sm->last_recv_radius); 960 radius_free_class(&sm->radius_class); 961 wpabuf_free(sm->radius_cui); 962#endif /* CONFIG_NO_RADIUS */ 963 964 os_free(sm->identity); 965 eapol_auth_free(sm); 966} 967 968 969#ifndef CONFIG_NO_RADIUS 970static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd, 971 struct sta_info *sta) 972{ 973 struct wpabuf *eap; 974 const struct eap_hdr *hdr; 975 int eap_type = -1; 976 char buf[64]; 977 struct radius_msg *msg; 978 struct eapol_state_machine *sm = sta->eapol_sm; 979 980 if (sm == NULL || sm->last_recv_radius == NULL) { 981 if (sm) 982 sm->eap_if->aaaEapNoReq = TRUE; 983 return; 984 } 985 986 msg = sm->last_recv_radius; 987 988 eap = radius_msg_get_eap(msg); 989 if (eap == NULL) { 990 /* RFC 3579, Chap. 2.6.3: 991 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message 992 * attribute */ 993 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 994 HOSTAPD_LEVEL_WARNING, "could not extract " 995 "EAP-Message from RADIUS message"); 996 sm->eap_if->aaaEapNoReq = TRUE; 997 return; 998 } 999 1000 if (wpabuf_len(eap) < sizeof(*hdr)) { 1001 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1002 HOSTAPD_LEVEL_WARNING, "too short EAP packet " 1003 "received from authentication server"); 1004 wpabuf_free(eap); 1005 sm->eap_if->aaaEapNoReq = TRUE; 1006 return; 1007 } 1008 1009 if (wpabuf_len(eap) > sizeof(*hdr)) 1010 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)]; 1011 1012 hdr = wpabuf_head(eap); 1013 switch (hdr->code) { 1014 case EAP_CODE_REQUEST: 1015 if (eap_type >= 0) 1016 sm->eap_type_authsrv = eap_type; 1017 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)", 1018 eap_type >= 0 ? eap_server_get_name(0, eap_type) : 1019 "??", 1020 eap_type); 1021 break; 1022 case EAP_CODE_RESPONSE: 1023 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)", 1024 eap_type >= 0 ? eap_server_get_name(0, eap_type) : 1025 "??", 1026 eap_type); 1027 break; 1028 case EAP_CODE_SUCCESS: 1029 os_strlcpy(buf, "EAP Success", sizeof(buf)); 1030 break; 1031 case EAP_CODE_FAILURE: 1032 os_strlcpy(buf, "EAP Failure", sizeof(buf)); 1033 break; 1034 default: 1035 os_strlcpy(buf, "unknown EAP code", sizeof(buf)); 1036 break; 1037 } 1038 buf[sizeof(buf) - 1] = '\0'; 1039 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1040 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d " 1041 "id=%d len=%d) from RADIUS server: %s", 1042 hdr->code, hdr->identifier, be_to_host16(hdr->length), 1043 buf); 1044 sm->eap_if->aaaEapReq = TRUE; 1045 1046 wpabuf_free(sm->eap_if->aaaEapReqData); 1047 sm->eap_if->aaaEapReqData = eap; 1048} 1049 1050 1051static void ieee802_1x_get_keys(struct hostapd_data *hapd, 1052 struct sta_info *sta, struct radius_msg *msg, 1053 struct radius_msg *req, 1054 const u8 *shared_secret, 1055 size_t shared_secret_len) 1056{ 1057 struct radius_ms_mppe_keys *keys; 1058 struct eapol_state_machine *sm = sta->eapol_sm; 1059 if (sm == NULL) 1060 return; 1061 1062 keys = radius_msg_get_ms_keys(msg, req, shared_secret, 1063 shared_secret_len); 1064 1065 if (keys && keys->send && keys->recv) { 1066 size_t len = keys->send_len + keys->recv_len; 1067 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key", 1068 keys->send, keys->send_len); 1069 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key", 1070 keys->recv, keys->recv_len); 1071 1072 os_free(sm->eap_if->aaaEapKeyData); 1073 sm->eap_if->aaaEapKeyData = os_malloc(len); 1074 if (sm->eap_if->aaaEapKeyData) { 1075 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv, 1076 keys->recv_len); 1077 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len, 1078 keys->send, keys->send_len); 1079 sm->eap_if->aaaEapKeyDataLen = len; 1080 sm->eap_if->aaaEapKeyAvailable = TRUE; 1081 } 1082 } 1083 1084 if (keys) { 1085 os_free(keys->send); 1086 os_free(keys->recv); 1087 os_free(keys); 1088 } 1089} 1090 1091 1092static void ieee802_1x_store_radius_class(struct hostapd_data *hapd, 1093 struct sta_info *sta, 1094 struct radius_msg *msg) 1095{ 1096 u8 *class; 1097 size_t class_len; 1098 struct eapol_state_machine *sm = sta->eapol_sm; 1099 int count, i; 1100 struct radius_attr_data *nclass; 1101 size_t nclass_count; 1102 1103 if (!hapd->conf->radius->acct_server || hapd->radius == NULL || 1104 sm == NULL) 1105 return; 1106 1107 radius_free_class(&sm->radius_class); 1108 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1); 1109 if (count <= 0) 1110 return; 1111 1112 nclass = os_calloc(count, sizeof(struct radius_attr_data)); 1113 if (nclass == NULL) 1114 return; 1115 1116 nclass_count = 0; 1117 1118 class = NULL; 1119 for (i = 0; i < count; i++) { 1120 do { 1121 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS, 1122 &class, &class_len, 1123 class) < 0) { 1124 i = count; 1125 break; 1126 } 1127 } while (class_len < 1); 1128 1129 nclass[nclass_count].data = os_malloc(class_len); 1130 if (nclass[nclass_count].data == NULL) 1131 break; 1132 1133 os_memcpy(nclass[nclass_count].data, class, class_len); 1134 nclass[nclass_count].len = class_len; 1135 nclass_count++; 1136 } 1137 1138 sm->radius_class.attr = nclass; 1139 sm->radius_class.count = nclass_count; 1140 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class " 1141 "attributes for " MACSTR, 1142 (unsigned long) sm->radius_class.count, 1143 MAC2STR(sta->addr)); 1144} 1145 1146 1147/* Update sta->identity based on User-Name attribute in Access-Accept */ 1148static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd, 1149 struct sta_info *sta, 1150 struct radius_msg *msg) 1151{ 1152 u8 *buf, *identity; 1153 size_t len; 1154 struct eapol_state_machine *sm = sta->eapol_sm; 1155 1156 if (sm == NULL) 1157 return; 1158 1159 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len, 1160 NULL) < 0) 1161 return; 1162 1163 identity = (u8 *) dup_binstr(buf, len); 1164 if (identity == NULL) 1165 return; 1166 1167 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1168 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with " 1169 "User-Name from Access-Accept '%s'", 1170 sm->identity ? (char *) sm->identity : "N/A", 1171 (char *) identity); 1172 1173 os_free(sm->identity); 1174 sm->identity = identity; 1175 sm->identity_len = len; 1176} 1177 1178 1179/* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */ 1180static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd, 1181 struct sta_info *sta, 1182 struct radius_msg *msg) 1183{ 1184 struct eapol_state_machine *sm = sta->eapol_sm; 1185 struct wpabuf *cui; 1186 u8 *buf; 1187 size_t len; 1188 1189 if (sm == NULL) 1190 return; 1191 1192 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, 1193 &buf, &len, NULL) < 0) 1194 return; 1195 1196 cui = wpabuf_alloc_copy(buf, len); 1197 if (cui == NULL) 1198 return; 1199 1200 wpabuf_free(sm->radius_cui); 1201 sm->radius_cui = cui; 1202} 1203 1204 1205struct sta_id_search { 1206 u8 identifier; 1207 struct eapol_state_machine *sm; 1208}; 1209 1210 1211static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd, 1212 struct sta_info *sta, 1213 void *ctx) 1214{ 1215 struct sta_id_search *id_search = ctx; 1216 struct eapol_state_machine *sm = sta->eapol_sm; 1217 1218 if (sm && sm->radius_identifier >= 0 && 1219 sm->radius_identifier == id_search->identifier) { 1220 id_search->sm = sm; 1221 return 1; 1222 } 1223 return 0; 1224} 1225 1226 1227static struct eapol_state_machine * 1228ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier) 1229{ 1230 struct sta_id_search id_search; 1231 id_search.identifier = identifier; 1232 id_search.sm = NULL; 1233 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search); 1234 return id_search.sm; 1235} 1236 1237 1238/** 1239 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server 1240 * @msg: RADIUS response message 1241 * @req: RADIUS request message 1242 * @shared_secret: RADIUS shared secret 1243 * @shared_secret_len: Length of shared_secret in octets 1244 * @data: Context data (struct hostapd_data *) 1245 * Returns: Processing status 1246 */ 1247static RadiusRxResult 1248ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req, 1249 const u8 *shared_secret, size_t shared_secret_len, 1250 void *data) 1251{ 1252 struct hostapd_data *hapd = data; 1253 struct sta_info *sta; 1254 u32 session_timeout = 0, termination_action, acct_interim_interval; 1255 int session_timeout_set, old_vlanid = 0; 1256 struct eapol_state_machine *sm; 1257 int override_eapReq = 0; 1258 struct radius_hdr *hdr = radius_msg_get_hdr(msg); 1259 1260 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier); 1261 if (sm == NULL) { 1262 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching " 1263 "station for this RADIUS message"); 1264 return RADIUS_RX_UNKNOWN; 1265 } 1266 sta = sm->sta; 1267 1268 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be 1269 * present when packet contains an EAP-Message attribute */ 1270 if (hdr->code == RADIUS_CODE_ACCESS_REJECT && 1271 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL, 1272 0) < 0 && 1273 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) { 1274 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without " 1275 "Message-Authenticator since it does not include " 1276 "EAP-Message"); 1277 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len, 1278 req, 1)) { 1279 printf("Incoming RADIUS packet did not have correct " 1280 "Message-Authenticator - dropped\n"); 1281 return RADIUS_RX_INVALID_AUTHENTICATOR; 1282 } 1283 1284 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT && 1285 hdr->code != RADIUS_CODE_ACCESS_REJECT && 1286 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) { 1287 printf("Unknown RADIUS message code\n"); 1288 return RADIUS_RX_UNKNOWN; 1289 } 1290 1291 sm->radius_identifier = -1; 1292 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR, 1293 MAC2STR(sta->addr)); 1294 1295 radius_msg_free(sm->last_recv_radius); 1296 sm->last_recv_radius = msg; 1297 1298 session_timeout_set = 1299 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT, 1300 &session_timeout); 1301 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION, 1302 &termination_action)) 1303 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT; 1304 1305 if (hapd->conf->acct_interim_interval == 0 && 1306 hdr->code == RADIUS_CODE_ACCESS_ACCEPT && 1307 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL, 1308 &acct_interim_interval) == 0) { 1309 if (acct_interim_interval < 60) { 1310 hostapd_logger(hapd, sta->addr, 1311 HOSTAPD_MODULE_IEEE8021X, 1312 HOSTAPD_LEVEL_INFO, 1313 "ignored too small " 1314 "Acct-Interim-Interval %d", 1315 acct_interim_interval); 1316 } else 1317 sta->acct_interim_interval = acct_interim_interval; 1318 } 1319 1320 1321 switch (hdr->code) { 1322 case RADIUS_CODE_ACCESS_ACCEPT: 1323 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED) 1324 sta->vlan_id = 0; 1325#ifndef CONFIG_NO_VLAN 1326 else { 1327 old_vlanid = sta->vlan_id; 1328 sta->vlan_id = radius_msg_get_vlanid(msg); 1329 } 1330 if (sta->vlan_id > 0 && 1331 hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) { 1332 hostapd_logger(hapd, sta->addr, 1333 HOSTAPD_MODULE_RADIUS, 1334 HOSTAPD_LEVEL_INFO, 1335 "VLAN ID %d", sta->vlan_id); 1336 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) { 1337 sta->eapol_sm->authFail = TRUE; 1338 hostapd_logger(hapd, sta->addr, 1339 HOSTAPD_MODULE_IEEE8021X, 1340 HOSTAPD_LEVEL_INFO, "authentication " 1341 "server did not include required VLAN " 1342 "ID in Access-Accept"); 1343 break; 1344 } 1345#endif /* CONFIG_NO_VLAN */ 1346 1347 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0) 1348 break; 1349 1350 /* RFC 3580, Ch. 3.17 */ 1351 if (session_timeout_set && termination_action == 1352 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) { 1353 sm->reAuthPeriod = session_timeout; 1354 } else if (session_timeout_set) 1355 ap_sta_session_timeout(hapd, sta, session_timeout); 1356 1357 sm->eap_if->aaaSuccess = TRUE; 1358 override_eapReq = 1; 1359 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret, 1360 shared_secret_len); 1361 ieee802_1x_store_radius_class(hapd, sta, msg); 1362 ieee802_1x_update_sta_identity(hapd, sta, msg); 1363 ieee802_1x_update_sta_cui(hapd, sta, msg); 1364 if (sm->eap_if->eapKeyAvailable && 1365 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt, 1366 session_timeout_set ? 1367 (int) session_timeout : -1, sm) == 0) { 1368 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 1369 HOSTAPD_LEVEL_DEBUG, 1370 "Added PMKSA cache entry"); 1371 } 1372 break; 1373 case RADIUS_CODE_ACCESS_REJECT: 1374 sm->eap_if->aaaFail = TRUE; 1375 override_eapReq = 1; 1376 break; 1377 case RADIUS_CODE_ACCESS_CHALLENGE: 1378 sm->eap_if->aaaEapReq = TRUE; 1379 if (session_timeout_set) { 1380 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */ 1381 sm->eap_if->aaaMethodTimeout = session_timeout; 1382 hostapd_logger(hapd, sm->addr, 1383 HOSTAPD_MODULE_IEEE8021X, 1384 HOSTAPD_LEVEL_DEBUG, 1385 "using EAP timeout of %d seconds (from " 1386 "RADIUS)", 1387 sm->eap_if->aaaMethodTimeout); 1388 } else { 1389 /* 1390 * Use dynamic retransmission behavior per EAP 1391 * specification. 1392 */ 1393 sm->eap_if->aaaMethodTimeout = 0; 1394 } 1395 break; 1396 } 1397 1398 ieee802_1x_decapsulate_radius(hapd, sta); 1399 if (override_eapReq) 1400 sm->eap_if->aaaEapReq = FALSE; 1401 1402 eapol_auth_step(sm); 1403 1404 return RADIUS_RX_QUEUED; 1405} 1406#endif /* CONFIG_NO_RADIUS */ 1407 1408 1409void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta) 1410{ 1411 struct eapol_state_machine *sm = sta->eapol_sm; 1412 if (sm == NULL) 1413 return; 1414 1415 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1416 HOSTAPD_LEVEL_DEBUG, "aborting authentication"); 1417 1418#ifndef CONFIG_NO_RADIUS 1419 radius_msg_free(sm->last_recv_radius); 1420 sm->last_recv_radius = NULL; 1421#endif /* CONFIG_NO_RADIUS */ 1422 1423 if (sm->eap_if->eapTimeout) { 1424 /* 1425 * Disconnect the STA since it did not reply to the last EAP 1426 * request and we cannot continue EAP processing (EAP-Failure 1427 * could only be sent if the EAP peer actually replied). 1428 */ 1429 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR, 1430 MAC2STR(sta->addr)); 1431 1432 sm->eap_if->portEnabled = FALSE; 1433 ap_sta_disconnect(hapd, sta, sta->addr, 1434 WLAN_REASON_PREV_AUTH_NOT_VALID); 1435 } 1436} 1437 1438 1439static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd) 1440{ 1441 struct eapol_authenticator *eapol = hapd->eapol_auth; 1442 1443 if (hapd->conf->default_wep_key_len < 1) 1444 return 0; 1445 1446 os_free(eapol->default_wep_key); 1447 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len); 1448 if (eapol->default_wep_key == NULL || 1449 random_get_bytes(eapol->default_wep_key, 1450 hapd->conf->default_wep_key_len)) { 1451 printf("Could not generate random WEP key.\n"); 1452 os_free(eapol->default_wep_key); 1453 eapol->default_wep_key = NULL; 1454 return -1; 1455 } 1456 1457 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key", 1458 eapol->default_wep_key, 1459 hapd->conf->default_wep_key_len); 1460 1461 return 0; 1462} 1463 1464 1465static int ieee802_1x_sta_key_available(struct hostapd_data *hapd, 1466 struct sta_info *sta, void *ctx) 1467{ 1468 if (sta->eapol_sm) { 1469 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE; 1470 eapol_auth_step(sta->eapol_sm); 1471 } 1472 return 0; 1473} 1474 1475 1476static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx) 1477{ 1478 struct hostapd_data *hapd = eloop_ctx; 1479 struct eapol_authenticator *eapol = hapd->eapol_auth; 1480 1481 if (eapol->default_wep_key_idx >= 3) 1482 eapol->default_wep_key_idx = 1483 hapd->conf->individual_wep_key_len > 0 ? 1 : 0; 1484 else 1485 eapol->default_wep_key_idx++; 1486 1487 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d", 1488 eapol->default_wep_key_idx); 1489 1490 if (ieee802_1x_rekey_broadcast(hapd)) { 1491 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 1492 HOSTAPD_LEVEL_WARNING, "failed to generate a " 1493 "new broadcast key"); 1494 os_free(eapol->default_wep_key); 1495 eapol->default_wep_key = NULL; 1496 return; 1497 } 1498 1499 /* TODO: Could setup key for RX here, but change default TX keyid only 1500 * after new broadcast key has been sent to all stations. */ 1501 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, 1502 broadcast_ether_addr, 1503 eapol->default_wep_key_idx, 1, NULL, 0, 1504 eapol->default_wep_key, 1505 hapd->conf->default_wep_key_len)) { 1506 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X, 1507 HOSTAPD_LEVEL_WARNING, "failed to configure a " 1508 "new broadcast key"); 1509 os_free(eapol->default_wep_key); 1510 eapol->default_wep_key = NULL; 1511 return; 1512 } 1513 1514 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL); 1515 1516 if (hapd->conf->wep_rekeying_period > 0) { 1517 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0, 1518 ieee802_1x_rekey, hapd, NULL); 1519 } 1520} 1521 1522 1523static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type, 1524 const u8 *data, size_t datalen) 1525{ 1526#ifdef CONFIG_WPS 1527 struct sta_info *sta = sta_ctx; 1528 1529 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) == 1530 WLAN_STA_MAYBE_WPS) { 1531 const u8 *identity; 1532 size_t identity_len; 1533 struct eapol_state_machine *sm = sta->eapol_sm; 1534 1535 identity = eap_get_identity(sm->eap, &identity_len); 1536 if (identity && 1537 ((identity_len == WSC_ID_ENROLLEE_LEN && 1538 os_memcmp(identity, WSC_ID_ENROLLEE, 1539 WSC_ID_ENROLLEE_LEN) == 0) || 1540 (identity_len == WSC_ID_REGISTRAR_LEN && 1541 os_memcmp(identity, WSC_ID_REGISTRAR, 1542 WSC_ID_REGISTRAR_LEN) == 0))) { 1543 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> " 1544 "WLAN_STA_WPS"); 1545 sta->flags |= WLAN_STA_WPS; 1546 } 1547 } 1548#endif /* CONFIG_WPS */ 1549 1550 ieee802_1x_send(ctx, sta_ctx, type, data, datalen); 1551} 1552 1553 1554static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx, 1555 const u8 *data, size_t datalen) 1556{ 1557#ifndef CONFIG_NO_RADIUS 1558 struct hostapd_data *hapd = ctx; 1559 struct sta_info *sta = sta_ctx; 1560 1561 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen); 1562#endif /* CONFIG_NO_RADIUS */ 1563} 1564 1565 1566static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success, 1567 int preauth) 1568{ 1569 struct hostapd_data *hapd = ctx; 1570 struct sta_info *sta = sta_ctx; 1571 if (preauth) 1572 rsn_preauth_finished(hapd, sta, success); 1573 else 1574 ieee802_1x_finished(hapd, sta, success); 1575} 1576 1577 1578static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity, 1579 size_t identity_len, int phase2, 1580 struct eap_user *user) 1581{ 1582 struct hostapd_data *hapd = ctx; 1583 const struct hostapd_eap_user *eap_user; 1584 int i; 1585 1586 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2); 1587 if (eap_user == NULL) 1588 return -1; 1589 1590 os_memset(user, 0, sizeof(*user)); 1591 user->phase2 = phase2; 1592 for (i = 0; i < EAP_MAX_METHODS; i++) { 1593 user->methods[i].vendor = eap_user->methods[i].vendor; 1594 user->methods[i].method = eap_user->methods[i].method; 1595 } 1596 1597 if (eap_user->password) { 1598 user->password = os_malloc(eap_user->password_len); 1599 if (user->password == NULL) 1600 return -1; 1601 os_memcpy(user->password, eap_user->password, 1602 eap_user->password_len); 1603 user->password_len = eap_user->password_len; 1604 user->password_hash = eap_user->password_hash; 1605 } 1606 user->force_version = eap_user->force_version; 1607 user->ttls_auth = eap_user->ttls_auth; 1608 1609 return 0; 1610} 1611 1612 1613static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr) 1614{ 1615 struct hostapd_data *hapd = ctx; 1616 struct sta_info *sta; 1617 sta = ap_get_sta(hapd, addr); 1618 if (sta == NULL || sta->eapol_sm == NULL) 1619 return 0; 1620 return 1; 1621} 1622 1623 1624static void ieee802_1x_logger(void *ctx, const u8 *addr, 1625 eapol_logger_level level, const char *txt) 1626{ 1627#ifndef CONFIG_NO_HOSTAPD_LOGGER 1628 struct hostapd_data *hapd = ctx; 1629 int hlevel; 1630 1631 switch (level) { 1632 case EAPOL_LOGGER_WARNING: 1633 hlevel = HOSTAPD_LEVEL_WARNING; 1634 break; 1635 case EAPOL_LOGGER_INFO: 1636 hlevel = HOSTAPD_LEVEL_INFO; 1637 break; 1638 case EAPOL_LOGGER_DEBUG: 1639 default: 1640 hlevel = HOSTAPD_LEVEL_DEBUG; 1641 break; 1642 } 1643 1644 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s", 1645 txt); 1646#endif /* CONFIG_NO_HOSTAPD_LOGGER */ 1647} 1648 1649 1650static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx, 1651 int authorized) 1652{ 1653 struct hostapd_data *hapd = ctx; 1654 struct sta_info *sta = sta_ctx; 1655 ieee802_1x_set_sta_authorized(hapd, sta, authorized); 1656} 1657 1658 1659static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx) 1660{ 1661 struct hostapd_data *hapd = ctx; 1662 struct sta_info *sta = sta_ctx; 1663 ieee802_1x_abort_auth(hapd, sta); 1664} 1665 1666 1667static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx) 1668{ 1669 struct hostapd_data *hapd = ctx; 1670 struct sta_info *sta = sta_ctx; 1671 ieee802_1x_tx_key(hapd, sta); 1672} 1673 1674 1675static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx, 1676 enum eapol_event type) 1677{ 1678 /* struct hostapd_data *hapd = ctx; */ 1679 struct sta_info *sta = sta_ctx; 1680 switch (type) { 1681 case EAPOL_AUTH_SM_CHANGE: 1682 wpa_auth_sm_notify(sta->wpa_sm); 1683 break; 1684 case EAPOL_AUTH_REAUTHENTICATE: 1685 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL); 1686 break; 1687 } 1688} 1689 1690 1691int ieee802_1x_init(struct hostapd_data *hapd) 1692{ 1693 int i; 1694 struct eapol_auth_config conf; 1695 struct eapol_auth_cb cb; 1696 1697 os_memset(&conf, 0, sizeof(conf)); 1698 conf.ctx = hapd; 1699 conf.eap_reauth_period = hapd->conf->eap_reauth_period; 1700 conf.wpa = hapd->conf->wpa; 1701 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len; 1702 conf.eap_server = hapd->conf->eap_server; 1703 conf.ssl_ctx = hapd->ssl_ctx; 1704 conf.msg_ctx = hapd->msg_ctx; 1705 conf.eap_sim_db_priv = hapd->eap_sim_db_priv; 1706 conf.eap_req_id_text = hapd->conf->eap_req_id_text; 1707 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len; 1708 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key; 1709 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id; 1710 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len; 1711 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info; 1712 conf.eap_fast_prov = hapd->conf->eap_fast_prov; 1713 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime; 1714 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time; 1715 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind; 1716 conf.tnc = hapd->conf->tnc; 1717 conf.wps = hapd->wps; 1718 conf.fragment_size = hapd->conf->fragment_size; 1719 conf.pwd_group = hapd->conf->pwd_group; 1720 conf.pbc_in_m1 = hapd->conf->pbc_in_m1; 1721 if (hapd->conf->server_id) { 1722 conf.server_id = (const u8 *) hapd->conf->server_id; 1723 conf.server_id_len = os_strlen(hapd->conf->server_id); 1724 } else { 1725 conf.server_id = (const u8 *) "hostapd"; 1726 conf.server_id_len = 7; 1727 } 1728 1729 os_memset(&cb, 0, sizeof(cb)); 1730 cb.eapol_send = ieee802_1x_eapol_send; 1731 cb.aaa_send = ieee802_1x_aaa_send; 1732 cb.finished = _ieee802_1x_finished; 1733 cb.get_eap_user = ieee802_1x_get_eap_user; 1734 cb.sta_entry_alive = ieee802_1x_sta_entry_alive; 1735 cb.logger = ieee802_1x_logger; 1736 cb.set_port_authorized = ieee802_1x_set_port_authorized; 1737 cb.abort_auth = _ieee802_1x_abort_auth; 1738 cb.tx_key = _ieee802_1x_tx_key; 1739 cb.eapol_event = ieee802_1x_eapol_event; 1740 1741 hapd->eapol_auth = eapol_auth_init(&conf, &cb); 1742 if (hapd->eapol_auth == NULL) 1743 return -1; 1744 1745 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) && 1746 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1)) 1747 return -1; 1748 1749#ifndef CONFIG_NO_RADIUS 1750 if (radius_client_register(hapd->radius, RADIUS_AUTH, 1751 ieee802_1x_receive_auth, hapd)) 1752 return -1; 1753#endif /* CONFIG_NO_RADIUS */ 1754 1755 if (hapd->conf->default_wep_key_len) { 1756 for (i = 0; i < 4; i++) 1757 hostapd_drv_set_key(hapd->conf->iface, hapd, 1758 WPA_ALG_NONE, NULL, i, 0, NULL, 0, 1759 NULL, 0); 1760 1761 ieee802_1x_rekey(hapd, NULL); 1762 1763 if (hapd->eapol_auth->default_wep_key == NULL) 1764 return -1; 1765 } 1766 1767 return 0; 1768} 1769 1770 1771void ieee802_1x_deinit(struct hostapd_data *hapd) 1772{ 1773 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL); 1774 1775 if (hapd->driver != NULL && 1776 (hapd->conf->ieee802_1x || hapd->conf->wpa)) 1777 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0); 1778 1779 eapol_auth_deinit(hapd->eapol_auth); 1780 hapd->eapol_auth = NULL; 1781} 1782 1783 1784int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 1785 const u8 *buf, size_t len, int ack) 1786{ 1787 struct ieee80211_hdr *hdr; 1788 u8 *pos; 1789 const unsigned char rfc1042_hdr[ETH_ALEN] = 1790 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 1791 1792 if (sta == NULL) 1793 return -1; 1794 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2) 1795 return 0; 1796 1797 hdr = (struct ieee80211_hdr *) buf; 1798 pos = (u8 *) (hdr + 1); 1799 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0) 1800 return 0; 1801 pos += sizeof(rfc1042_hdr); 1802 if (WPA_GET_BE16(pos) != ETH_P_PAE) 1803 return 0; 1804 pos += 2; 1805 1806 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos, 1807 ack); 1808} 1809 1810 1811int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta, 1812 const u8 *buf, int len, int ack) 1813{ 1814 const struct ieee802_1x_hdr *xhdr = 1815 (const struct ieee802_1x_hdr *) buf; 1816 const u8 *pos = buf + sizeof(*xhdr); 1817 struct ieee802_1x_eapol_key *key; 1818 1819 if (len < (int) sizeof(*xhdr)) 1820 return 0; 1821 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d " 1822 "type=%d length=%d - ack=%d", 1823 MAC2STR(sta->addr), xhdr->version, xhdr->type, 1824 be_to_host16(xhdr->length), ack); 1825 1826 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY) 1827 return 0; 1828 1829 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) { 1830 const struct wpa_eapol_key *wpa; 1831 wpa = (const struct wpa_eapol_key *) pos; 1832 if (wpa->type == EAPOL_KEY_TYPE_RSN || 1833 wpa->type == EAPOL_KEY_TYPE_WPA) 1834 wpa_auth_eapol_key_tx_status(hapd->wpa_auth, 1835 sta->wpa_sm, ack); 1836 } 1837 1838 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant 1839 * or Authenticator state machines, but EAPOL-Key packets are not 1840 * retransmitted in case of failure. Try to re-send failed EAPOL-Key 1841 * packets couple of times because otherwise STA keys become 1842 * unsynchronized with AP. */ 1843 if (!ack && pos + sizeof(*key) <= buf + len) { 1844 key = (struct ieee802_1x_eapol_key *) pos; 1845 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X, 1846 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key " 1847 "frame (%scast index=%d)", 1848 key->key_index & BIT(7) ? "uni" : "broad", 1849 key->key_index & ~BIT(7)); 1850 /* TODO: re-send EAPOL-Key couple of times (with short delay 1851 * between them?). If all attempt fail, report error and 1852 * deauthenticate STA so that it will get new keys when 1853 * authenticating again (e.g., after returning in range). 1854 * Separate limit/transmit state needed both for unicast and 1855 * broadcast keys(?) */ 1856 } 1857 /* TODO: could move unicast key configuration from ieee802_1x_tx_key() 1858 * to here and change the key only if the EAPOL-Key packet was Acked. 1859 */ 1860 1861 return 1; 1862} 1863 1864 1865u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len) 1866{ 1867 if (sm == NULL || sm->identity == NULL) 1868 return NULL; 1869 1870 *len = sm->identity_len; 1871 return sm->identity; 1872} 1873 1874 1875u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len, 1876 int idx) 1877{ 1878 if (sm == NULL || sm->radius_class.attr == NULL || 1879 idx >= (int) sm->radius_class.count) 1880 return NULL; 1881 1882 *len = sm->radius_class.attr[idx].len; 1883 return sm->radius_class.attr[idx].data; 1884} 1885 1886 1887struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm) 1888{ 1889 if (sm == NULL) 1890 return NULL; 1891 return sm->radius_cui; 1892} 1893 1894 1895const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len) 1896{ 1897 *len = 0; 1898 if (sm == NULL) 1899 return NULL; 1900 1901 *len = sm->eap_if->eapKeyDataLen; 1902 return sm->eap_if->eapKeyData; 1903} 1904 1905 1906void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm, 1907 int enabled) 1908{ 1909 if (sm == NULL) 1910 return; 1911 sm->eap_if->portEnabled = enabled ? TRUE : FALSE; 1912 eapol_auth_step(sm); 1913} 1914 1915 1916void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, 1917 int valid) 1918{ 1919 if (sm == NULL) 1920 return; 1921 sm->portValid = valid ? TRUE : FALSE; 1922 eapol_auth_step(sm); 1923} 1924 1925 1926void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth) 1927{ 1928 if (sm == NULL) 1929 return; 1930 if (pre_auth) 1931 sm->flags |= EAPOL_SM_PREAUTH; 1932 else 1933 sm->flags &= ~EAPOL_SM_PREAUTH; 1934} 1935 1936 1937static const char * bool_txt(Boolean bool) 1938{ 1939 return bool ? "TRUE" : "FALSE"; 1940} 1941 1942 1943int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) 1944{ 1945 /* TODO */ 1946 return 0; 1947} 1948 1949 1950int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, 1951 char *buf, size_t buflen) 1952{ 1953 int len = 0, ret; 1954 struct eapol_state_machine *sm = sta->eapol_sm; 1955 struct os_time t; 1956 1957 if (sm == NULL) 1958 return 0; 1959 1960 ret = os_snprintf(buf + len, buflen - len, 1961 "dot1xPaePortNumber=%d\n" 1962 "dot1xPaePortProtocolVersion=%d\n" 1963 "dot1xPaePortCapabilities=1\n" 1964 "dot1xPaePortInitialize=%d\n" 1965 "dot1xPaePortReauthenticate=FALSE\n", 1966 sta->aid, 1967 EAPOL_VERSION, 1968 sm->initialize); 1969 if (ret < 0 || (size_t) ret >= buflen - len) 1970 return len; 1971 len += ret; 1972 1973 /* dot1xAuthConfigTable */ 1974 ret = os_snprintf(buf + len, buflen - len, 1975 "dot1xAuthPaeState=%d\n" 1976 "dot1xAuthBackendAuthState=%d\n" 1977 "dot1xAuthAdminControlledDirections=%d\n" 1978 "dot1xAuthOperControlledDirections=%d\n" 1979 "dot1xAuthAuthControlledPortStatus=%d\n" 1980 "dot1xAuthAuthControlledPortControl=%d\n" 1981 "dot1xAuthQuietPeriod=%u\n" 1982 "dot1xAuthServerTimeout=%u\n" 1983 "dot1xAuthReAuthPeriod=%u\n" 1984 "dot1xAuthReAuthEnabled=%s\n" 1985 "dot1xAuthKeyTxEnabled=%s\n", 1986 sm->auth_pae_state + 1, 1987 sm->be_auth_state + 1, 1988 sm->adminControlledDirections, 1989 sm->operControlledDirections, 1990 sm->authPortStatus, 1991 sm->portControl, 1992 sm->quietPeriod, 1993 sm->serverTimeout, 1994 sm->reAuthPeriod, 1995 bool_txt(sm->reAuthEnabled), 1996 bool_txt(sm->keyTxEnabled)); 1997 if (ret < 0 || (size_t) ret >= buflen - len) 1998 return len; 1999 len += ret; 2000 2001 /* dot1xAuthStatsTable */ 2002 ret = os_snprintf(buf + len, buflen - len, 2003 "dot1xAuthEapolFramesRx=%u\n" 2004 "dot1xAuthEapolFramesTx=%u\n" 2005 "dot1xAuthEapolStartFramesRx=%u\n" 2006 "dot1xAuthEapolLogoffFramesRx=%u\n" 2007 "dot1xAuthEapolRespIdFramesRx=%u\n" 2008 "dot1xAuthEapolRespFramesRx=%u\n" 2009 "dot1xAuthEapolReqIdFramesTx=%u\n" 2010 "dot1xAuthEapolReqFramesTx=%u\n" 2011 "dot1xAuthInvalidEapolFramesRx=%u\n" 2012 "dot1xAuthEapLengthErrorFramesRx=%u\n" 2013 "dot1xAuthLastEapolFrameVersion=%u\n" 2014 "dot1xAuthLastEapolFrameSource=" MACSTR "\n", 2015 sm->dot1xAuthEapolFramesRx, 2016 sm->dot1xAuthEapolFramesTx, 2017 sm->dot1xAuthEapolStartFramesRx, 2018 sm->dot1xAuthEapolLogoffFramesRx, 2019 sm->dot1xAuthEapolRespIdFramesRx, 2020 sm->dot1xAuthEapolRespFramesRx, 2021 sm->dot1xAuthEapolReqIdFramesTx, 2022 sm->dot1xAuthEapolReqFramesTx, 2023 sm->dot1xAuthInvalidEapolFramesRx, 2024 sm->dot1xAuthEapLengthErrorFramesRx, 2025 sm->dot1xAuthLastEapolFrameVersion, 2026 MAC2STR(sm->addr)); 2027 if (ret < 0 || (size_t) ret >= buflen - len) 2028 return len; 2029 len += ret; 2030 2031 /* dot1xAuthDiagTable */ 2032 ret = os_snprintf(buf + len, buflen - len, 2033 "dot1xAuthEntersConnecting=%u\n" 2034 "dot1xAuthEapLogoffsWhileConnecting=%u\n" 2035 "dot1xAuthEntersAuthenticating=%u\n" 2036 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n" 2037 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n" 2038 "dot1xAuthAuthFailWhileAuthenticating=%u\n" 2039 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n" 2040 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n" 2041 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n" 2042 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n" 2043 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n" 2044 "dot1xAuthBackendResponses=%u\n" 2045 "dot1xAuthBackendAccessChallenges=%u\n" 2046 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n" 2047 "dot1xAuthBackendAuthSuccesses=%u\n" 2048 "dot1xAuthBackendAuthFails=%u\n", 2049 sm->authEntersConnecting, 2050 sm->authEapLogoffsWhileConnecting, 2051 sm->authEntersAuthenticating, 2052 sm->authAuthSuccessesWhileAuthenticating, 2053 sm->authAuthTimeoutsWhileAuthenticating, 2054 sm->authAuthFailWhileAuthenticating, 2055 sm->authAuthEapStartsWhileAuthenticating, 2056 sm->authAuthEapLogoffWhileAuthenticating, 2057 sm->authAuthReauthsWhileAuthenticated, 2058 sm->authAuthEapStartsWhileAuthenticated, 2059 sm->authAuthEapLogoffWhileAuthenticated, 2060 sm->backendResponses, 2061 sm->backendAccessChallenges, 2062 sm->backendOtherRequestsToSupplicant, 2063 sm->backendAuthSuccesses, 2064 sm->backendAuthFails); 2065 if (ret < 0 || (size_t) ret >= buflen - len) 2066 return len; 2067 len += ret; 2068 2069 /* dot1xAuthSessionStatsTable */ 2070 os_get_time(&t); 2071 ret = os_snprintf(buf + len, buflen - len, 2072 /* TODO: dot1xAuthSessionOctetsRx */ 2073 /* TODO: dot1xAuthSessionOctetsTx */ 2074 /* TODO: dot1xAuthSessionFramesRx */ 2075 /* TODO: dot1xAuthSessionFramesTx */ 2076 "dot1xAuthSessionId=%08X-%08X\n" 2077 "dot1xAuthSessionAuthenticMethod=%d\n" 2078 "dot1xAuthSessionTime=%u\n" 2079 "dot1xAuthSessionTerminateCause=999\n" 2080 "dot1xAuthSessionUserName=%s\n", 2081 sta->acct_session_id_hi, sta->acct_session_id_lo, 2082 (wpa_key_mgmt_wpa_ieee8021x( 2083 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ? 2084 1 : 2, 2085 (unsigned int) (t.sec - sta->acct_session_start), 2086 sm->identity); 2087 if (ret < 0 || (size_t) ret >= buflen - len) 2088 return len; 2089 len += ret; 2090 2091 return len; 2092} 2093 2094 2095static void ieee802_1x_finished(struct hostapd_data *hapd, 2096 struct sta_info *sta, int success) 2097{ 2098 const u8 *key; 2099 size_t len; 2100 /* TODO: get PMKLifetime from WPA parameters */ 2101 static const int dot11RSNAConfigPMKLifetime = 43200; 2102 2103 key = ieee802_1x_get_key(sta->eapol_sm, &len); 2104 if (success && key && len >= PMK_LEN && 2105 wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime, 2106 sta->eapol_sm) == 0) { 2107 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, 2108 HOSTAPD_LEVEL_DEBUG, 2109 "Added PMKSA cache entry (IEEE 802.1X)"); 2110 } 2111 2112 if (!success) { 2113 /* 2114 * Many devices require deauthentication after WPS provisioning 2115 * and some may not be be able to do that themselves, so 2116 * disconnect the client here. In addition, this may also 2117 * benefit IEEE 802.1X/EAPOL authentication cases, too since 2118 * the EAPOL PAE state machine would remain in HELD state for 2119 * considerable amount of time and some EAP methods, like 2120 * EAP-FAST with anonymous provisioning, may require another 2121 * EAPOL authentication to be started to complete connection. 2122 */ 2123 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force " 2124 "disconnection after EAP-Failure"); 2125 /* Add a small sleep to increase likelihood of previously 2126 * requested EAP-Failure TX getting out before this should the 2127 * driver reorder operations. 2128 */ 2129 os_sleep(0, 10000); 2130#ifndef ANDROID_P2P 2131 /* We need not do this for driver. For AP-SME flags if we send this disassoc, 2132 * the p2p_client is gettig disassoc after it has completed the assoc 2133 */ 2134 ap_sta_disconnect(hapd, sta, sta->addr, 2135 WLAN_REASON_IEEE_802_1X_AUTH_FAILED); 2136#endif 2137 } 2138} 2139