1 /* 2 * hostapd / Configuration helper functions 3 * Copyright (c) 2003-2012, 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 "crypto/sha1.h" 13 #include "radius/radius_client.h" 14 #include "common/ieee802_11_defs.h" 15 #include "common/eapol_common.h" 16 #include "eap_common/eap_wsc_common.h" 17 #include "eap_server/eap.h" 18 #include "wpa_auth.h" 19 #include "sta_info.h" 20 #include "ap_config.h" 21 22 23 static void hostapd_config_free_vlan(struct hostapd_bss_config *bss) 24 { 25 struct hostapd_vlan *vlan, *prev; 26 27 vlan = bss->vlan; 28 prev = NULL; 29 while (vlan) { 30 prev = vlan; 31 vlan = vlan->next; 32 os_free(prev); 33 } 34 35 bss->vlan = NULL; 36 } 37 38 39 void hostapd_config_defaults_bss(struct hostapd_bss_config *bss) 40 { 41 bss->logger_syslog_level = HOSTAPD_LEVEL_INFO; 42 bss->logger_stdout_level = HOSTAPD_LEVEL_INFO; 43 bss->logger_syslog = (unsigned int) -1; 44 bss->logger_stdout = (unsigned int) -1; 45 46 bss->auth_algs = WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED; 47 48 bss->wep_rekeying_period = 300; 49 /* use key0 in individual key and key1 in broadcast key */ 50 bss->broadcast_key_idx_min = 1; 51 bss->broadcast_key_idx_max = 2; 52 bss->eap_reauth_period = 3600; 53 54 bss->wpa_group_rekey = 600; 55 bss->wpa_gmk_rekey = 86400; 56 bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK; 57 bss->wpa_pairwise = WPA_CIPHER_TKIP; 58 bss->wpa_group = WPA_CIPHER_TKIP; 59 bss->rsn_pairwise = 0; 60 61 bss->max_num_sta = MAX_STA_COUNT; 62 63 bss->dtim_period = 2; 64 65 bss->radius_server_auth_port = 1812; 66 bss->ap_max_inactivity = AP_MAX_INACTIVITY; 67 bss->eapol_version = EAPOL_VERSION; 68 69 bss->max_listen_interval = 65535; 70 71 bss->pwd_group = 19; /* ECC: GF(p=256) */ 72 73 #ifdef CONFIG_IEEE80211W 74 bss->assoc_sa_query_max_timeout = 1000; 75 bss->assoc_sa_query_retry_timeout = 201; 76 #endif /* CONFIG_IEEE80211W */ 77 #ifdef EAP_SERVER_FAST 78 /* both anonymous and authenticated provisioning */ 79 bss->eap_fast_prov = 3; 80 bss->pac_key_lifetime = 7 * 24 * 60 * 60; 81 bss->pac_key_refresh_time = 1 * 24 * 60 * 60; 82 #endif /* EAP_SERVER_FAST */ 83 84 /* Set to -1 as defaults depends on HT in setup */ 85 bss->wmm_enabled = -1; 86 87 #ifdef CONFIG_IEEE80211R 88 bss->ft_over_ds = 1; 89 #endif /* CONFIG_IEEE80211R */ 90 91 bss->radius_das_time_window = 300; 92 } 93 94 95 struct hostapd_config * hostapd_config_defaults(void) 96 { 97 #define ecw2cw(ecw) ((1 << (ecw)) - 1) 98 99 struct hostapd_config *conf; 100 struct hostapd_bss_config *bss; 101 const int aCWmin = 4, aCWmax = 10; 102 const struct hostapd_wmm_ac_params ac_bk = 103 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */ 104 const struct hostapd_wmm_ac_params ac_be = 105 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */ 106 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */ 107 { aCWmin - 1, aCWmin, 2, 3000 / 32, 0 }; 108 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */ 109 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 0 }; 110 const struct hostapd_tx_queue_params txq_bk = 111 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 }; 112 const struct hostapd_tx_queue_params txq_be = 113 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0}; 114 const struct hostapd_tx_queue_params txq_vi = 115 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30}; 116 const struct hostapd_tx_queue_params txq_vo = 117 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1, 118 (ecw2cw(aCWmin) + 1) / 2 - 1, 15}; 119 120 #undef ecw2cw 121 122 conf = os_zalloc(sizeof(*conf)); 123 bss = os_zalloc(sizeof(*bss)); 124 if (conf == NULL || bss == NULL) { 125 wpa_printf(MSG_ERROR, "Failed to allocate memory for " 126 "configuration data."); 127 os_free(conf); 128 os_free(bss); 129 return NULL; 130 } 131 132 bss->radius = os_zalloc(sizeof(*bss->radius)); 133 if (bss->radius == NULL) { 134 os_free(conf); 135 os_free(bss); 136 return NULL; 137 } 138 139 hostapd_config_defaults_bss(bss); 140 141 conf->num_bss = 1; 142 conf->bss = bss; 143 144 conf->beacon_int = 100; 145 conf->rts_threshold = -1; /* use driver default: 2347 */ 146 conf->fragm_threshold = -1; /* user driver default: 2346 */ 147 conf->send_probe_response = 1; 148 149 conf->wmm_ac_params[0] = ac_be; 150 conf->wmm_ac_params[1] = ac_bk; 151 conf->wmm_ac_params[2] = ac_vi; 152 conf->wmm_ac_params[3] = ac_vo; 153 154 conf->tx_queue[0] = txq_vo; 155 conf->tx_queue[1] = txq_vi; 156 conf->tx_queue[2] = txq_be; 157 conf->tx_queue[3] = txq_bk; 158 159 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED; 160 161 return conf; 162 } 163 164 165 int hostapd_mac_comp(const void *a, const void *b) 166 { 167 return os_memcmp(a, b, sizeof(macaddr)); 168 } 169 170 171 int hostapd_mac_comp_empty(const void *a) 172 { 173 macaddr empty = { 0 }; 174 return os_memcmp(a, empty, sizeof(macaddr)); 175 } 176 177 178 static int hostapd_config_read_wpa_psk(const char *fname, 179 struct hostapd_ssid *ssid) 180 { 181 FILE *f; 182 char buf[128], *pos; 183 int line = 0, ret = 0, len, ok; 184 u8 addr[ETH_ALEN]; 185 struct hostapd_wpa_psk *psk; 186 187 if (!fname) 188 return 0; 189 190 f = fopen(fname, "r"); 191 if (!f) { 192 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname); 193 return -1; 194 } 195 196 while (fgets(buf, sizeof(buf), f)) { 197 line++; 198 199 if (buf[0] == '#') 200 continue; 201 pos = buf; 202 while (*pos != '\0') { 203 if (*pos == '\n') { 204 *pos = '\0'; 205 break; 206 } 207 pos++; 208 } 209 if (buf[0] == '\0') 210 continue; 211 212 if (hwaddr_aton(buf, addr)) { 213 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on " 214 "line %d in '%s'", buf, line, fname); 215 ret = -1; 216 break; 217 } 218 219 psk = os_zalloc(sizeof(*psk)); 220 if (psk == NULL) { 221 wpa_printf(MSG_ERROR, "WPA PSK allocation failed"); 222 ret = -1; 223 break; 224 } 225 if (is_zero_ether_addr(addr)) 226 psk->group = 1; 227 else 228 os_memcpy(psk->addr, addr, ETH_ALEN); 229 230 pos = buf + 17; 231 if (*pos == '\0') { 232 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'", 233 line, fname); 234 os_free(psk); 235 ret = -1; 236 break; 237 } 238 pos++; 239 240 ok = 0; 241 len = os_strlen(pos); 242 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0) 243 ok = 1; 244 else if (len >= 8 && len < 64) { 245 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len, 246 4096, psk->psk, PMK_LEN); 247 ok = 1; 248 } 249 if (!ok) { 250 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in " 251 "'%s'", pos, line, fname); 252 os_free(psk); 253 ret = -1; 254 break; 255 } 256 257 psk->next = ssid->wpa_psk; 258 ssid->wpa_psk = psk; 259 } 260 261 fclose(f); 262 263 return ret; 264 } 265 266 267 static int hostapd_derive_psk(struct hostapd_ssid *ssid) 268 { 269 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk)); 270 if (ssid->wpa_psk == NULL) { 271 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK"); 272 return -1; 273 } 274 wpa_hexdump_ascii(MSG_DEBUG, "SSID", 275 (u8 *) ssid->ssid, ssid->ssid_len); 276 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)", 277 (u8 *) ssid->wpa_passphrase, 278 os_strlen(ssid->wpa_passphrase)); 279 pbkdf2_sha1(ssid->wpa_passphrase, 280 ssid->ssid, ssid->ssid_len, 281 4096, ssid->wpa_psk->psk, PMK_LEN); 282 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)", 283 ssid->wpa_psk->psk, PMK_LEN); 284 return 0; 285 } 286 287 288 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf) 289 { 290 struct hostapd_ssid *ssid = &conf->ssid; 291 292 if (ssid->wpa_passphrase != NULL) { 293 if (ssid->wpa_psk != NULL) { 294 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK " 295 "instead of passphrase"); 296 } else { 297 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on " 298 "passphrase"); 299 if (hostapd_derive_psk(ssid) < 0) 300 return -1; 301 } 302 ssid->wpa_psk->group = 1; 303 } 304 305 if (ssid->wpa_psk_file) { 306 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file, 307 &conf->ssid)) 308 return -1; 309 } 310 311 return 0; 312 } 313 314 315 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b) 316 { 317 int i; 318 319 if (a->idx != b->idx || a->default_len != b->default_len) 320 return 1; 321 for (i = 0; i < NUM_WEP_KEYS; i++) 322 if (a->len[i] != b->len[i] || 323 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0) 324 return 1; 325 return 0; 326 } 327 328 329 static void hostapd_config_free_radius(struct hostapd_radius_server *servers, 330 int num_servers) 331 { 332 int i; 333 334 for (i = 0; i < num_servers; i++) { 335 os_free(servers[i].shared_secret); 336 } 337 os_free(servers); 338 } 339 340 341 struct hostapd_radius_attr * 342 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type) 343 { 344 for (; attr; attr = attr->next) { 345 if (attr->type == type) 346 return attr; 347 } 348 return NULL; 349 } 350 351 352 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr) 353 { 354 struct hostapd_radius_attr *prev; 355 356 while (attr) { 357 prev = attr; 358 attr = attr->next; 359 wpabuf_free(prev->val); 360 os_free(prev); 361 } 362 } 363 364 365 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user) 366 { 367 os_free(user->identity); 368 os_free(user->password); 369 os_free(user); 370 } 371 372 373 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys) 374 { 375 int i; 376 for (i = 0; i < NUM_WEP_KEYS; i++) { 377 os_free(keys->key[i]); 378 keys->key[i] = NULL; 379 } 380 } 381 382 383 static void hostapd_config_free_bss(struct hostapd_bss_config *conf) 384 { 385 struct hostapd_wpa_psk *psk, *prev; 386 struct hostapd_eap_user *user, *prev_user; 387 388 if (conf == NULL) 389 return; 390 391 psk = conf->ssid.wpa_psk; 392 while (psk) { 393 prev = psk; 394 psk = psk->next; 395 os_free(prev); 396 } 397 398 os_free(conf->ssid.wpa_passphrase); 399 os_free(conf->ssid.wpa_psk_file); 400 hostapd_config_free_wep(&conf->ssid.wep); 401 #ifdef CONFIG_FULL_DYNAMIC_VLAN 402 os_free(conf->ssid.vlan_tagged_interface); 403 #endif /* CONFIG_FULL_DYNAMIC_VLAN */ 404 405 user = conf->eap_user; 406 while (user) { 407 prev_user = user; 408 user = user->next; 409 hostapd_config_free_eap_user(prev_user); 410 } 411 412 os_free(conf->dump_log_name); 413 os_free(conf->eap_req_id_text); 414 os_free(conf->accept_mac); 415 os_free(conf->deny_mac); 416 os_free(conf->nas_identifier); 417 hostapd_config_free_radius(conf->radius->auth_servers, 418 conf->radius->num_auth_servers); 419 hostapd_config_free_radius(conf->radius->acct_servers, 420 conf->radius->num_acct_servers); 421 hostapd_config_free_radius_attr(conf->radius_auth_req_attr); 422 hostapd_config_free_radius_attr(conf->radius_acct_req_attr); 423 os_free(conf->rsn_preauth_interfaces); 424 os_free(conf->ctrl_interface); 425 os_free(conf->ca_cert); 426 os_free(conf->server_cert); 427 os_free(conf->private_key); 428 os_free(conf->private_key_passwd); 429 os_free(conf->dh_file); 430 os_free(conf->pac_opaque_encr_key); 431 os_free(conf->eap_fast_a_id); 432 os_free(conf->eap_fast_a_id_info); 433 os_free(conf->eap_sim_db); 434 os_free(conf->radius_server_clients); 435 os_free(conf->test_socket); 436 os_free(conf->radius); 437 os_free(conf->radius_das_shared_secret); 438 hostapd_config_free_vlan(conf); 439 if (conf->ssid.dyn_vlan_keys) { 440 struct hostapd_ssid *ssid = &conf->ssid; 441 size_t i; 442 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) { 443 if (ssid->dyn_vlan_keys[i] == NULL) 444 continue; 445 hostapd_config_free_wep(ssid->dyn_vlan_keys[i]); 446 os_free(ssid->dyn_vlan_keys[i]); 447 } 448 os_free(ssid->dyn_vlan_keys); 449 ssid->dyn_vlan_keys = NULL; 450 } 451 452 os_free(conf->time_zone); 453 454 #ifdef CONFIG_IEEE80211R 455 { 456 struct ft_remote_r0kh *r0kh, *r0kh_prev; 457 struct ft_remote_r1kh *r1kh, *r1kh_prev; 458 459 r0kh = conf->r0kh_list; 460 conf->r0kh_list = NULL; 461 while (r0kh) { 462 r0kh_prev = r0kh; 463 r0kh = r0kh->next; 464 os_free(r0kh_prev); 465 } 466 467 r1kh = conf->r1kh_list; 468 conf->r1kh_list = NULL; 469 while (r1kh) { 470 r1kh_prev = r1kh; 471 r1kh = r1kh->next; 472 os_free(r1kh_prev); 473 } 474 } 475 #endif /* CONFIG_IEEE80211R */ 476 477 #ifdef CONFIG_WPS 478 os_free(conf->wps_pin_requests); 479 os_free(conf->device_name); 480 os_free(conf->manufacturer); 481 os_free(conf->model_name); 482 os_free(conf->model_number); 483 os_free(conf->serial_number); 484 os_free(conf->config_methods); 485 os_free(conf->ap_pin); 486 os_free(conf->extra_cred); 487 os_free(conf->ap_settings); 488 os_free(conf->upnp_iface); 489 os_free(conf->friendly_name); 490 os_free(conf->manufacturer_url); 491 os_free(conf->model_description); 492 os_free(conf->model_url); 493 os_free(conf->upc); 494 wpabuf_free(conf->wps_nfc_dh_pubkey); 495 wpabuf_free(conf->wps_nfc_dh_privkey); 496 wpabuf_free(conf->wps_nfc_dev_pw); 497 #endif /* CONFIG_WPS */ 498 499 os_free(conf->roaming_consortium); 500 os_free(conf->venue_name); 501 os_free(conf->nai_realm_data); 502 os_free(conf->network_auth_type); 503 os_free(conf->anqp_3gpp_cell_net); 504 os_free(conf->domain_name); 505 506 #ifdef CONFIG_RADIUS_TEST 507 os_free(conf->dump_msk_file); 508 #endif /* CONFIG_RADIUS_TEST */ 509 510 #ifdef CONFIG_HS20 511 os_free(conf->hs20_oper_friendly_name); 512 os_free(conf->hs20_wan_metrics); 513 os_free(conf->hs20_connection_capability); 514 os_free(conf->hs20_operating_class); 515 #endif /* CONFIG_HS20 */ 516 517 wpabuf_free(conf->vendor_elements); 518 } 519 520 521 /** 522 * hostapd_config_free - Free hostapd configuration 523 * @conf: Configuration data from hostapd_config_read(). 524 */ 525 void hostapd_config_free(struct hostapd_config *conf) 526 { 527 size_t i; 528 529 if (conf == NULL) 530 return; 531 532 for (i = 0; i < conf->num_bss; i++) 533 hostapd_config_free_bss(&conf->bss[i]); 534 os_free(conf->bss); 535 os_free(conf->supported_rates); 536 os_free(conf->basic_rates); 537 538 os_free(conf); 539 } 540 541 542 /** 543 * hostapd_maclist_found - Find a MAC address from a list 544 * @list: MAC address list 545 * @num_entries: Number of addresses in the list 546 * @addr: Address to search for 547 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed 548 * Returns: 1 if address is in the list or 0 if not. 549 * 550 * Perform a binary search for given MAC address from a pre-sorted list. 551 */ 552 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries, 553 const u8 *addr, int *vlan_id) 554 { 555 int start, end, middle, res; 556 557 start = 0; 558 end = num_entries - 1; 559 560 while (start <= end) { 561 middle = (start + end) / 2; 562 res = os_memcmp(list[middle].addr, addr, ETH_ALEN); 563 if (res == 0) { 564 if (vlan_id) 565 *vlan_id = list[middle].vlan_id; 566 return 1; 567 } 568 if (res < 0) 569 start = middle + 1; 570 else 571 end = middle - 1; 572 } 573 574 return 0; 575 } 576 577 578 int hostapd_rate_found(int *list, int rate) 579 { 580 int i; 581 582 if (list == NULL) 583 return 0; 584 585 for (i = 0; list[i] >= 0; i++) 586 if (list[i] == rate) 587 return 1; 588 589 return 0; 590 } 591 592 593 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id) 594 { 595 struct hostapd_vlan *v = vlan; 596 while (v) { 597 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD) 598 return v->ifname; 599 v = v->next; 600 } 601 return NULL; 602 } 603 604 605 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf, 606 const u8 *addr, const u8 *prev_psk) 607 { 608 struct hostapd_wpa_psk *psk; 609 int next_ok = prev_psk == NULL; 610 611 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) { 612 if (next_ok && 613 (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0)) 614 return psk->psk; 615 616 if (psk->psk == prev_psk) 617 next_ok = 1; 618 } 619 620 return NULL; 621 } 622 623 624 const struct hostapd_eap_user * 625 hostapd_get_eap_user(const struct hostapd_bss_config *conf, const u8 *identity, 626 size_t identity_len, int phase2) 627 { 628 struct hostapd_eap_user *user = conf->eap_user; 629 630 #ifdef CONFIG_WPS 631 if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN && 632 os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) { 633 static struct hostapd_eap_user wsc_enrollee; 634 os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee)); 635 wsc_enrollee.methods[0].method = eap_server_get_type( 636 "WSC", &wsc_enrollee.methods[0].vendor); 637 return &wsc_enrollee; 638 } 639 640 if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN && 641 os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) { 642 static struct hostapd_eap_user wsc_registrar; 643 os_memset(&wsc_registrar, 0, sizeof(wsc_registrar)); 644 wsc_registrar.methods[0].method = eap_server_get_type( 645 "WSC", &wsc_registrar.methods[0].vendor); 646 wsc_registrar.password = (u8 *) conf->ap_pin; 647 wsc_registrar.password_len = conf->ap_pin ? 648 os_strlen(conf->ap_pin) : 0; 649 return &wsc_registrar; 650 } 651 #endif /* CONFIG_WPS */ 652 653 while (user) { 654 if (!phase2 && user->identity == NULL) { 655 /* Wildcard match */ 656 break; 657 } 658 659 if (user->phase2 == !!phase2 && user->wildcard_prefix && 660 identity_len >= user->identity_len && 661 os_memcmp(user->identity, identity, user->identity_len) == 662 0) { 663 /* Wildcard prefix match */ 664 break; 665 } 666 667 if (user->phase2 == !!phase2 && 668 user->identity_len == identity_len && 669 os_memcmp(user->identity, identity, identity_len) == 0) 670 break; 671 user = user->next; 672 } 673 674 return user; 675 } 676
