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 bss->sae_anti_clogging_threshold = 5; 94 } 95 96 97 struct hostapd_config * hostapd_config_defaults(void) 98 { 99 #define ecw2cw(ecw) ((1 << (ecw)) - 1) 100 101 struct hostapd_config *conf; 102 struct hostapd_bss_config *bss; 103 const int aCWmin = 4, aCWmax = 10; 104 const struct hostapd_wmm_ac_params ac_bk = 105 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */ 106 const struct hostapd_wmm_ac_params ac_be = 107 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */ 108 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */ 109 { aCWmin - 1, aCWmin, 2, 3000 / 32, 0 }; 110 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */ 111 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 0 }; 112 const struct hostapd_tx_queue_params txq_bk = 113 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 }; 114 const struct hostapd_tx_queue_params txq_be = 115 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0}; 116 const struct hostapd_tx_queue_params txq_vi = 117 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30}; 118 const struct hostapd_tx_queue_params txq_vo = 119 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1, 120 (ecw2cw(aCWmin) + 1) / 2 - 1, 15}; 121 122 #undef ecw2cw 123 124 conf = os_zalloc(sizeof(*conf)); 125 bss = os_zalloc(sizeof(*bss)); 126 if (conf == NULL || bss == NULL) { 127 wpa_printf(MSG_ERROR, "Failed to allocate memory for " 128 "configuration data."); 129 os_free(conf); 130 os_free(bss); 131 return NULL; 132 } 133 134 bss->radius = os_zalloc(sizeof(*bss->radius)); 135 if (bss->radius == NULL) { 136 os_free(conf); 137 os_free(bss); 138 return NULL; 139 } 140 141 hostapd_config_defaults_bss(bss); 142 143 conf->num_bss = 1; 144 conf->bss = bss; 145 146 conf->beacon_int = 100; 147 conf->rts_threshold = -1; /* use driver default: 2347 */ 148 conf->fragm_threshold = -1; /* user driver default: 2346 */ 149 conf->send_probe_response = 1; 150 151 conf->wmm_ac_params[0] = ac_be; 152 conf->wmm_ac_params[1] = ac_bk; 153 conf->wmm_ac_params[2] = ac_vi; 154 conf->wmm_ac_params[3] = ac_vo; 155 156 conf->tx_queue[0] = txq_vo; 157 conf->tx_queue[1] = txq_vi; 158 conf->tx_queue[2] = txq_be; 159 conf->tx_queue[3] = txq_bk; 160 161 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED; 162 163 conf->ap_table_max_size = 255; 164 conf->ap_table_expiration_time = 60; 165 166 return conf; 167 } 168 169 170 int hostapd_mac_comp(const void *a, const void *b) 171 { 172 return os_memcmp(a, b, sizeof(macaddr)); 173 } 174 175 176 int hostapd_mac_comp_empty(const void *a) 177 { 178 macaddr empty = { 0 }; 179 return os_memcmp(a, empty, sizeof(macaddr)); 180 } 181 182 183 static int hostapd_config_read_wpa_psk(const char *fname, 184 struct hostapd_ssid *ssid) 185 { 186 FILE *f; 187 char buf[128], *pos; 188 int line = 0, ret = 0, len, ok; 189 u8 addr[ETH_ALEN]; 190 struct hostapd_wpa_psk *psk; 191 192 if (!fname) 193 return 0; 194 195 f = fopen(fname, "r"); 196 if (!f) { 197 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname); 198 return -1; 199 } 200 201 while (fgets(buf, sizeof(buf), f)) { 202 line++; 203 204 if (buf[0] == '#') 205 continue; 206 pos = buf; 207 while (*pos != '\0') { 208 if (*pos == '\n') { 209 *pos = '\0'; 210 break; 211 } 212 pos++; 213 } 214 if (buf[0] == '\0') 215 continue; 216 217 if (hwaddr_aton(buf, addr)) { 218 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on " 219 "line %d in '%s'", buf, line, fname); 220 ret = -1; 221 break; 222 } 223 224 psk = os_zalloc(sizeof(*psk)); 225 if (psk == NULL) { 226 wpa_printf(MSG_ERROR, "WPA PSK allocation failed"); 227 ret = -1; 228 break; 229 } 230 if (is_zero_ether_addr(addr)) 231 psk->group = 1; 232 else 233 os_memcpy(psk->addr, addr, ETH_ALEN); 234 235 pos = buf + 17; 236 if (*pos == '\0') { 237 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'", 238 line, fname); 239 os_free(psk); 240 ret = -1; 241 break; 242 } 243 pos++; 244 245 ok = 0; 246 len = os_strlen(pos); 247 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0) 248 ok = 1; 249 else if (len >= 8 && len < 64) { 250 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len, 251 4096, psk->psk, PMK_LEN); 252 ok = 1; 253 } 254 if (!ok) { 255 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in " 256 "'%s'", pos, line, fname); 257 os_free(psk); 258 ret = -1; 259 break; 260 } 261 262 psk->next = ssid->wpa_psk; 263 ssid->wpa_psk = psk; 264 } 265 266 fclose(f); 267 268 return ret; 269 } 270 271 272 static int hostapd_derive_psk(struct hostapd_ssid *ssid) 273 { 274 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk)); 275 if (ssid->wpa_psk == NULL) { 276 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK"); 277 return -1; 278 } 279 wpa_hexdump_ascii(MSG_DEBUG, "SSID", 280 (u8 *) ssid->ssid, ssid->ssid_len); 281 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)", 282 (u8 *) ssid->wpa_passphrase, 283 os_strlen(ssid->wpa_passphrase)); 284 pbkdf2_sha1(ssid->wpa_passphrase, 285 ssid->ssid, ssid->ssid_len, 286 4096, ssid->wpa_psk->psk, PMK_LEN); 287 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)", 288 ssid->wpa_psk->psk, PMK_LEN); 289 return 0; 290 } 291 292 293 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf) 294 { 295 struct hostapd_ssid *ssid = &conf->ssid; 296 297 if (ssid->wpa_passphrase != NULL) { 298 if (ssid->wpa_psk != NULL) { 299 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK " 300 "instead of passphrase"); 301 } else { 302 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on " 303 "passphrase"); 304 if (hostapd_derive_psk(ssid) < 0) 305 return -1; 306 } 307 ssid->wpa_psk->group = 1; 308 } 309 310 if (ssid->wpa_psk_file) { 311 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file, 312 &conf->ssid)) 313 return -1; 314 } 315 316 return 0; 317 } 318 319 320 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b) 321 { 322 int i; 323 324 if (a->idx != b->idx || a->default_len != b->default_len) 325 return 1; 326 for (i = 0; i < NUM_WEP_KEYS; i++) 327 if (a->len[i] != b->len[i] || 328 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0) 329 return 1; 330 return 0; 331 } 332 333 334 static void hostapd_config_free_radius(struct hostapd_radius_server *servers, 335 int num_servers) 336 { 337 int i; 338 339 for (i = 0; i < num_servers; i++) { 340 os_free(servers[i].shared_secret); 341 } 342 os_free(servers); 343 } 344 345 346 struct hostapd_radius_attr * 347 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type) 348 { 349 for (; attr; attr = attr->next) { 350 if (attr->type == type) 351 return attr; 352 } 353 return NULL; 354 } 355 356 357 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr) 358 { 359 struct hostapd_radius_attr *prev; 360 361 while (attr) { 362 prev = attr; 363 attr = attr->next; 364 wpabuf_free(prev->val); 365 os_free(prev); 366 } 367 } 368 369 370 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user) 371 { 372 os_free(user->identity); 373 os_free(user->password); 374 os_free(user); 375 } 376 377 378 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys) 379 { 380 int i; 381 for (i = 0; i < NUM_WEP_KEYS; i++) { 382 os_free(keys->key[i]); 383 keys->key[i] = NULL; 384 } 385 } 386 387 388 static void hostapd_config_free_bss(struct hostapd_bss_config *conf) 389 { 390 struct hostapd_wpa_psk *psk, *prev; 391 struct hostapd_eap_user *user, *prev_user; 392 393 if (conf == NULL) 394 return; 395 396 psk = conf->ssid.wpa_psk; 397 while (psk) { 398 prev = psk; 399 psk = psk->next; 400 os_free(prev); 401 } 402 403 os_free(conf->ssid.wpa_passphrase); 404 os_free(conf->ssid.wpa_psk_file); 405 hostapd_config_free_wep(&conf->ssid.wep); 406 #ifdef CONFIG_FULL_DYNAMIC_VLAN 407 os_free(conf->ssid.vlan_tagged_interface); 408 #endif /* CONFIG_FULL_DYNAMIC_VLAN */ 409 410 user = conf->eap_user; 411 while (user) { 412 prev_user = user; 413 user = user->next; 414 hostapd_config_free_eap_user(prev_user); 415 } 416 os_free(conf->eap_user_sqlite); 417 418 os_free(conf->dump_log_name); 419 os_free(conf->eap_req_id_text); 420 os_free(conf->accept_mac); 421 os_free(conf->deny_mac); 422 os_free(conf->nas_identifier); 423 hostapd_config_free_radius(conf->radius->auth_servers, 424 conf->radius->num_auth_servers); 425 hostapd_config_free_radius(conf->radius->acct_servers, 426 conf->radius->num_acct_servers); 427 hostapd_config_free_radius_attr(conf->radius_auth_req_attr); 428 hostapd_config_free_radius_attr(conf->radius_acct_req_attr); 429 os_free(conf->rsn_preauth_interfaces); 430 os_free(conf->ctrl_interface); 431 os_free(conf->ca_cert); 432 os_free(conf->server_cert); 433 os_free(conf->private_key); 434 os_free(conf->private_key_passwd); 435 os_free(conf->dh_file); 436 os_free(conf->pac_opaque_encr_key); 437 os_free(conf->eap_fast_a_id); 438 os_free(conf->eap_fast_a_id_info); 439 os_free(conf->eap_sim_db); 440 os_free(conf->radius_server_clients); 441 os_free(conf->test_socket); 442 os_free(conf->radius); 443 os_free(conf->radius_das_shared_secret); 444 hostapd_config_free_vlan(conf); 445 if (conf->ssid.dyn_vlan_keys) { 446 struct hostapd_ssid *ssid = &conf->ssid; 447 size_t i; 448 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) { 449 if (ssid->dyn_vlan_keys[i] == NULL) 450 continue; 451 hostapd_config_free_wep(ssid->dyn_vlan_keys[i]); 452 os_free(ssid->dyn_vlan_keys[i]); 453 } 454 os_free(ssid->dyn_vlan_keys); 455 ssid->dyn_vlan_keys = NULL; 456 } 457 458 os_free(conf->time_zone); 459 460 #ifdef CONFIG_IEEE80211R 461 { 462 struct ft_remote_r0kh *r0kh, *r0kh_prev; 463 struct ft_remote_r1kh *r1kh, *r1kh_prev; 464 465 r0kh = conf->r0kh_list; 466 conf->r0kh_list = NULL; 467 while (r0kh) { 468 r0kh_prev = r0kh; 469 r0kh = r0kh->next; 470 os_free(r0kh_prev); 471 } 472 473 r1kh = conf->r1kh_list; 474 conf->r1kh_list = NULL; 475 while (r1kh) { 476 r1kh_prev = r1kh; 477 r1kh = r1kh->next; 478 os_free(r1kh_prev); 479 } 480 } 481 #endif /* CONFIG_IEEE80211R */ 482 483 #ifdef CONFIG_WPS 484 os_free(conf->wps_pin_requests); 485 os_free(conf->device_name); 486 os_free(conf->manufacturer); 487 os_free(conf->model_name); 488 os_free(conf->model_number); 489 os_free(conf->serial_number); 490 os_free(conf->config_methods); 491 os_free(conf->ap_pin); 492 os_free(conf->extra_cred); 493 os_free(conf->ap_settings); 494 os_free(conf->upnp_iface); 495 os_free(conf->friendly_name); 496 os_free(conf->manufacturer_url); 497 os_free(conf->model_description); 498 os_free(conf->model_url); 499 os_free(conf->upc); 500 wpabuf_free(conf->wps_nfc_dh_pubkey); 501 wpabuf_free(conf->wps_nfc_dh_privkey); 502 wpabuf_free(conf->wps_nfc_dev_pw); 503 #endif /* CONFIG_WPS */ 504 505 os_free(conf->roaming_consortium); 506 os_free(conf->venue_name); 507 os_free(conf->nai_realm_data); 508 os_free(conf->network_auth_type); 509 os_free(conf->anqp_3gpp_cell_net); 510 os_free(conf->domain_name); 511 512 #ifdef CONFIG_RADIUS_TEST 513 os_free(conf->dump_msk_file); 514 #endif /* CONFIG_RADIUS_TEST */ 515 516 #ifdef CONFIG_HS20 517 os_free(conf->hs20_oper_friendly_name); 518 os_free(conf->hs20_wan_metrics); 519 os_free(conf->hs20_connection_capability); 520 os_free(conf->hs20_operating_class); 521 #endif /* CONFIG_HS20 */ 522 523 wpabuf_free(conf->vendor_elements); 524 525 os_free(conf->sae_groups); 526 } 527 528 529 /** 530 * hostapd_config_free - Free hostapd configuration 531 * @conf: Configuration data from hostapd_config_read(). 532 */ 533 void hostapd_config_free(struct hostapd_config *conf) 534 { 535 size_t i; 536 537 if (conf == NULL) 538 return; 539 540 for (i = 0; i < conf->num_bss; i++) 541 hostapd_config_free_bss(&conf->bss[i]); 542 os_free(conf->bss); 543 os_free(conf->supported_rates); 544 os_free(conf->basic_rates); 545 546 os_free(conf); 547 } 548 549 550 /** 551 * hostapd_maclist_found - Find a MAC address from a list 552 * @list: MAC address list 553 * @num_entries: Number of addresses in the list 554 * @addr: Address to search for 555 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed 556 * Returns: 1 if address is in the list or 0 if not. 557 * 558 * Perform a binary search for given MAC address from a pre-sorted list. 559 */ 560 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries, 561 const u8 *addr, int *vlan_id) 562 { 563 int start, end, middle, res; 564 565 start = 0; 566 end = num_entries - 1; 567 568 while (start <= end) { 569 middle = (start + end) / 2; 570 res = os_memcmp(list[middle].addr, addr, ETH_ALEN); 571 if (res == 0) { 572 if (vlan_id) 573 *vlan_id = list[middle].vlan_id; 574 return 1; 575 } 576 if (res < 0) 577 start = middle + 1; 578 else 579 end = middle - 1; 580 } 581 582 return 0; 583 } 584 585 586 int hostapd_rate_found(int *list, int rate) 587 { 588 int i; 589 590 if (list == NULL) 591 return 0; 592 593 for (i = 0; list[i] >= 0; i++) 594 if (list[i] == rate) 595 return 1; 596 597 return 0; 598 } 599 600 601 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id) 602 { 603 struct hostapd_vlan *v = vlan; 604 while (v) { 605 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD) 606 return v->ifname; 607 v = v->next; 608 } 609 return NULL; 610 } 611 612 613 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf, 614 const u8 *addr, const u8 *prev_psk) 615 { 616 struct hostapd_wpa_psk *psk; 617 int next_ok = prev_psk == NULL; 618 619 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) { 620 if (next_ok && 621 (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0)) 622 return psk->psk; 623 624 if (psk->psk == prev_psk) 625 next_ok = 1; 626 } 627 628 return NULL; 629 } 630
