1 /* 2 * hostapd / Configuration helper functions 3 * Copyright (c) 2003-2013, 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 #ifdef CONFIG_TESTING_OPTIONS 167 conf->ignore_probe_probability = 0.0d; 168 conf->ignore_auth_probability = 0.0d; 169 conf->ignore_assoc_probability = 0.0d; 170 conf->ignore_reassoc_probability = 0.0d; 171 conf->corrupt_gtk_rekey_mic_probability = 0.0d; 172 #endif /* CONFIG_TESTING_OPTIONS */ 173 174 #ifdef CONFIG_ACS 175 conf->acs_num_scans = 5; 176 #endif /* CONFIG_ACS */ 177 178 return conf; 179 } 180 181 182 int hostapd_mac_comp(const void *a, const void *b) 183 { 184 return os_memcmp(a, b, sizeof(macaddr)); 185 } 186 187 188 int hostapd_mac_comp_empty(const void *a) 189 { 190 macaddr empty = { 0 }; 191 return os_memcmp(a, empty, sizeof(macaddr)); 192 } 193 194 195 static int hostapd_config_read_wpa_psk(const char *fname, 196 struct hostapd_ssid *ssid) 197 { 198 FILE *f; 199 char buf[128], *pos; 200 int line = 0, ret = 0, len, ok; 201 u8 addr[ETH_ALEN]; 202 struct hostapd_wpa_psk *psk; 203 204 if (!fname) 205 return 0; 206 207 f = fopen(fname, "r"); 208 if (!f) { 209 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname); 210 return -1; 211 } 212 213 while (fgets(buf, sizeof(buf), f)) { 214 line++; 215 216 if (buf[0] == '#') 217 continue; 218 pos = buf; 219 while (*pos != '\0') { 220 if (*pos == '\n') { 221 *pos = '\0'; 222 break; 223 } 224 pos++; 225 } 226 if (buf[0] == '\0') 227 continue; 228 229 if (hwaddr_aton(buf, addr)) { 230 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on " 231 "line %d in '%s'", buf, line, fname); 232 ret = -1; 233 break; 234 } 235 236 psk = os_zalloc(sizeof(*psk)); 237 if (psk == NULL) { 238 wpa_printf(MSG_ERROR, "WPA PSK allocation failed"); 239 ret = -1; 240 break; 241 } 242 if (is_zero_ether_addr(addr)) 243 psk->group = 1; 244 else 245 os_memcpy(psk->addr, addr, ETH_ALEN); 246 247 pos = buf + 17; 248 if (*pos == '\0') { 249 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'", 250 line, fname); 251 os_free(psk); 252 ret = -1; 253 break; 254 } 255 pos++; 256 257 ok = 0; 258 len = os_strlen(pos); 259 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0) 260 ok = 1; 261 else if (len >= 8 && len < 64) { 262 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len, 263 4096, psk->psk, PMK_LEN); 264 ok = 1; 265 } 266 if (!ok) { 267 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in " 268 "'%s'", pos, line, fname); 269 os_free(psk); 270 ret = -1; 271 break; 272 } 273 274 psk->next = ssid->wpa_psk; 275 ssid->wpa_psk = psk; 276 } 277 278 fclose(f); 279 280 return ret; 281 } 282 283 284 static int hostapd_derive_psk(struct hostapd_ssid *ssid) 285 { 286 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk)); 287 if (ssid->wpa_psk == NULL) { 288 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK"); 289 return -1; 290 } 291 wpa_hexdump_ascii(MSG_DEBUG, "SSID", 292 (u8 *) ssid->ssid, ssid->ssid_len); 293 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)", 294 (u8 *) ssid->wpa_passphrase, 295 os_strlen(ssid->wpa_passphrase)); 296 pbkdf2_sha1(ssid->wpa_passphrase, 297 ssid->ssid, ssid->ssid_len, 298 4096, ssid->wpa_psk->psk, PMK_LEN); 299 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)", 300 ssid->wpa_psk->psk, PMK_LEN); 301 return 0; 302 } 303 304 305 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf) 306 { 307 struct hostapd_ssid *ssid = &conf->ssid; 308 309 if (ssid->wpa_passphrase != NULL) { 310 if (ssid->wpa_psk != NULL) { 311 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK " 312 "instead of passphrase"); 313 } else { 314 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on " 315 "passphrase"); 316 if (hostapd_derive_psk(ssid) < 0) 317 return -1; 318 } 319 ssid->wpa_psk->group = 1; 320 } 321 322 if (ssid->wpa_psk_file) { 323 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file, 324 &conf->ssid)) 325 return -1; 326 } 327 328 return 0; 329 } 330 331 332 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b) 333 { 334 int i; 335 336 if (a->idx != b->idx || a->default_len != b->default_len) 337 return 1; 338 for (i = 0; i < NUM_WEP_KEYS; i++) 339 if (a->len[i] != b->len[i] || 340 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0) 341 return 1; 342 return 0; 343 } 344 345 346 static void hostapd_config_free_radius(struct hostapd_radius_server *servers, 347 int num_servers) 348 { 349 int i; 350 351 for (i = 0; i < num_servers; i++) { 352 os_free(servers[i].shared_secret); 353 } 354 os_free(servers); 355 } 356 357 358 struct hostapd_radius_attr * 359 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type) 360 { 361 for (; attr; attr = attr->next) { 362 if (attr->type == type) 363 return attr; 364 } 365 return NULL; 366 } 367 368 369 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr) 370 { 371 struct hostapd_radius_attr *prev; 372 373 while (attr) { 374 prev = attr; 375 attr = attr->next; 376 wpabuf_free(prev->val); 377 os_free(prev); 378 } 379 } 380 381 382 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user) 383 { 384 os_free(user->identity); 385 os_free(user->password); 386 os_free(user); 387 } 388 389 390 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys) 391 { 392 int i; 393 for (i = 0; i < NUM_WEP_KEYS; i++) { 394 os_free(keys->key[i]); 395 keys->key[i] = NULL; 396 } 397 } 398 399 400 static void hostapd_config_free_bss(struct hostapd_bss_config *conf) 401 { 402 struct hostapd_wpa_psk *psk, *prev; 403 struct hostapd_eap_user *user, *prev_user; 404 405 if (conf == NULL) 406 return; 407 408 psk = conf->ssid.wpa_psk; 409 while (psk) { 410 prev = psk; 411 psk = psk->next; 412 os_free(prev); 413 } 414 415 os_free(conf->ssid.wpa_passphrase); 416 os_free(conf->ssid.wpa_psk_file); 417 hostapd_config_free_wep(&conf->ssid.wep); 418 #ifdef CONFIG_FULL_DYNAMIC_VLAN 419 os_free(conf->ssid.vlan_tagged_interface); 420 #endif /* CONFIG_FULL_DYNAMIC_VLAN */ 421 422 user = conf->eap_user; 423 while (user) { 424 prev_user = user; 425 user = user->next; 426 hostapd_config_free_eap_user(prev_user); 427 } 428 os_free(conf->eap_user_sqlite); 429 430 os_free(conf->dump_log_name); 431 os_free(conf->eap_req_id_text); 432 os_free(conf->accept_mac); 433 os_free(conf->deny_mac); 434 os_free(conf->nas_identifier); 435 hostapd_config_free_radius(conf->radius->auth_servers, 436 conf->radius->num_auth_servers); 437 hostapd_config_free_radius(conf->radius->acct_servers, 438 conf->radius->num_acct_servers); 439 hostapd_config_free_radius_attr(conf->radius_auth_req_attr); 440 hostapd_config_free_radius_attr(conf->radius_acct_req_attr); 441 os_free(conf->rsn_preauth_interfaces); 442 os_free(conf->ctrl_interface); 443 os_free(conf->ca_cert); 444 os_free(conf->server_cert); 445 os_free(conf->private_key); 446 os_free(conf->private_key_passwd); 447 os_free(conf->ocsp_stapling_response); 448 os_free(conf->dh_file); 449 os_free(conf->pac_opaque_encr_key); 450 os_free(conf->eap_fast_a_id); 451 os_free(conf->eap_fast_a_id_info); 452 os_free(conf->eap_sim_db); 453 os_free(conf->radius_server_clients); 454 os_free(conf->test_socket); 455 os_free(conf->radius); 456 os_free(conf->radius_das_shared_secret); 457 hostapd_config_free_vlan(conf); 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 os_free(conf->server_id); 528 } 529 530 531 /** 532 * hostapd_config_free - Free hostapd configuration 533 * @conf: Configuration data from hostapd_config_read(). 534 */ 535 void hostapd_config_free(struct hostapd_config *conf) 536 { 537 size_t i; 538 539 if (conf == NULL) 540 return; 541 542 for (i = 0; i < conf->num_bss; i++) 543 hostapd_config_free_bss(&conf->bss[i]); 544 os_free(conf->bss); 545 os_free(conf->supported_rates); 546 os_free(conf->basic_rates); 547 548 os_free(conf); 549 } 550 551 552 /** 553 * hostapd_maclist_found - Find a MAC address from a list 554 * @list: MAC address list 555 * @num_entries: Number of addresses in the list 556 * @addr: Address to search for 557 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed 558 * Returns: 1 if address is in the list or 0 if not. 559 * 560 * Perform a binary search for given MAC address from a pre-sorted list. 561 */ 562 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries, 563 const u8 *addr, int *vlan_id) 564 { 565 int start, end, middle, res; 566 567 start = 0; 568 end = num_entries - 1; 569 570 while (start <= end) { 571 middle = (start + end) / 2; 572 res = os_memcmp(list[middle].addr, addr, ETH_ALEN); 573 if (res == 0) { 574 if (vlan_id) 575 *vlan_id = list[middle].vlan_id; 576 return 1; 577 } 578 if (res < 0) 579 start = middle + 1; 580 else 581 end = middle - 1; 582 } 583 584 return 0; 585 } 586 587 588 int hostapd_rate_found(int *list, int rate) 589 { 590 int i; 591 592 if (list == NULL) 593 return 0; 594 595 for (i = 0; list[i] >= 0; i++) 596 if (list[i] == rate) 597 return 1; 598 599 return 0; 600 } 601 602 603 int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id) 604 { 605 struct hostapd_vlan *v = vlan; 606 while (v) { 607 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD) 608 return 1; 609 v = v->next; 610 } 611 return 0; 612 } 613 614 615 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id) 616 { 617 struct hostapd_vlan *v = vlan; 618 while (v) { 619 if (v->vlan_id == vlan_id) 620 return v->ifname; 621 v = v->next; 622 } 623 return NULL; 624 } 625 626 627 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf, 628 const u8 *addr, const u8 *p2p_dev_addr, 629 const u8 *prev_psk) 630 { 631 struct hostapd_wpa_psk *psk; 632 int next_ok = prev_psk == NULL; 633 634 if (p2p_dev_addr) { 635 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR 636 " p2p_dev_addr=" MACSTR " prev_psk=%p", 637 MAC2STR(addr), MAC2STR(p2p_dev_addr), prev_psk); 638 if (!is_zero_ether_addr(p2p_dev_addr)) 639 addr = NULL; /* Use P2P Device Address for matching */ 640 } else { 641 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR 642 " prev_psk=%p", 643 MAC2STR(addr), prev_psk); 644 } 645 646 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) { 647 if (next_ok && 648 (psk->group || 649 (addr && os_memcmp(psk->addr, addr, ETH_ALEN) == 0) || 650 (!addr && p2p_dev_addr && 651 os_memcmp(psk->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 652 0))) 653 return psk->psk; 654 655 if (psk->psk == prev_psk) 656 next_ok = 1; 657 } 658 659 return NULL; 660 } 661
