1 /* 2 * hostapd / Configuration helper functions 3 * Copyright (c) 2003-2009, 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 92 93 struct hostapd_config * hostapd_config_defaults(void) 94 { 95 #define ecw2cw(ecw) ((1 << (ecw)) - 1) 96 97 struct hostapd_config *conf; 98 struct hostapd_bss_config *bss; 99 const int aCWmin = 4, aCWmax = 10; 100 const struct hostapd_wmm_ac_params ac_bk = 101 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */ 102 const struct hostapd_wmm_ac_params ac_be = 103 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */ 104 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */ 105 { aCWmin - 1, aCWmin, 2, 3000 / 32, 1 }; 106 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */ 107 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 1 }; 108 const struct hostapd_tx_queue_params txq_bk = 109 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 }; 110 const struct hostapd_tx_queue_params txq_be = 111 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0}; 112 const struct hostapd_tx_queue_params txq_vi = 113 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30}; 114 const struct hostapd_tx_queue_params txq_vo = 115 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1, 116 (ecw2cw(aCWmin) + 1) / 2 - 1, 15}; 117 118 #undef ecw2cw 119 120 conf = os_zalloc(sizeof(*conf)); 121 bss = os_zalloc(sizeof(*bss)); 122 if (conf == NULL || bss == NULL) { 123 wpa_printf(MSG_ERROR, "Failed to allocate memory for " 124 "configuration data."); 125 os_free(conf); 126 os_free(bss); 127 return NULL; 128 } 129 130 bss->radius = os_zalloc(sizeof(*bss->radius)); 131 if (bss->radius == NULL) { 132 os_free(conf); 133 os_free(bss); 134 return NULL; 135 } 136 137 hostapd_config_defaults_bss(bss); 138 139 conf->num_bss = 1; 140 conf->bss = bss; 141 142 conf->beacon_int = 100; 143 conf->rts_threshold = -1; /* use driver default: 2347 */ 144 conf->fragm_threshold = -1; /* user driver default: 2346 */ 145 conf->send_probe_response = 1; 146 147 conf->wmm_ac_params[0] = ac_be; 148 conf->wmm_ac_params[1] = ac_bk; 149 conf->wmm_ac_params[2] = ac_vi; 150 conf->wmm_ac_params[3] = ac_vo; 151 152 conf->tx_queue[0] = txq_vo; 153 conf->tx_queue[1] = txq_vi; 154 conf->tx_queue[2] = txq_be; 155 conf->tx_queue[3] = txq_bk; 156 157 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED; 158 159 return conf; 160 } 161 162 163 int hostapd_mac_comp(const void *a, const void *b) 164 { 165 return os_memcmp(a, b, sizeof(macaddr)); 166 } 167 168 169 int hostapd_mac_comp_empty(const void *a) 170 { 171 macaddr empty = { 0 }; 172 return os_memcmp(a, empty, sizeof(macaddr)); 173 } 174 175 176 static int hostapd_config_read_wpa_psk(const char *fname, 177 struct hostapd_ssid *ssid) 178 { 179 FILE *f; 180 char buf[128], *pos; 181 int line = 0, ret = 0, len, ok; 182 u8 addr[ETH_ALEN]; 183 struct hostapd_wpa_psk *psk; 184 185 if (!fname) 186 return 0; 187 188 f = fopen(fname, "r"); 189 if (!f) { 190 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname); 191 return -1; 192 } 193 194 while (fgets(buf, sizeof(buf), f)) { 195 line++; 196 197 if (buf[0] == '#') 198 continue; 199 pos = buf; 200 while (*pos != '\0') { 201 if (*pos == '\n') { 202 *pos = '\0'; 203 break; 204 } 205 pos++; 206 } 207 if (buf[0] == '\0') 208 continue; 209 210 if (hwaddr_aton(buf, addr)) { 211 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on " 212 "line %d in '%s'", buf, line, fname); 213 ret = -1; 214 break; 215 } 216 217 psk = os_zalloc(sizeof(*psk)); 218 if (psk == NULL) { 219 wpa_printf(MSG_ERROR, "WPA PSK allocation failed"); 220 ret = -1; 221 break; 222 } 223 if (is_zero_ether_addr(addr)) 224 psk->group = 1; 225 else 226 os_memcpy(psk->addr, addr, ETH_ALEN); 227 228 pos = buf + 17; 229 if (*pos == '\0') { 230 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'", 231 line, fname); 232 os_free(psk); 233 ret = -1; 234 break; 235 } 236 pos++; 237 238 ok = 0; 239 len = os_strlen(pos); 240 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0) 241 ok = 1; 242 else if (len >= 8 && len < 64) { 243 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len, 244 4096, psk->psk, PMK_LEN); 245 ok = 1; 246 } 247 if (!ok) { 248 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in " 249 "'%s'", pos, line, fname); 250 os_free(psk); 251 ret = -1; 252 break; 253 } 254 255 psk->next = ssid->wpa_psk; 256 ssid->wpa_psk = psk; 257 } 258 259 fclose(f); 260 261 return ret; 262 } 263 264 265 static int hostapd_derive_psk(struct hostapd_ssid *ssid) 266 { 267 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk)); 268 if (ssid->wpa_psk == NULL) { 269 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK"); 270 return -1; 271 } 272 wpa_hexdump_ascii(MSG_DEBUG, "SSID", 273 (u8 *) ssid->ssid, ssid->ssid_len); 274 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)", 275 (u8 *) ssid->wpa_passphrase, 276 os_strlen(ssid->wpa_passphrase)); 277 pbkdf2_sha1(ssid->wpa_passphrase, 278 ssid->ssid, ssid->ssid_len, 279 4096, ssid->wpa_psk->psk, PMK_LEN); 280 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)", 281 ssid->wpa_psk->psk, PMK_LEN); 282 return 0; 283 } 284 285 286 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf) 287 { 288 struct hostapd_ssid *ssid = &conf->ssid; 289 290 if (ssid->wpa_passphrase != NULL) { 291 if (ssid->wpa_psk != NULL) { 292 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK " 293 "instead of passphrase"); 294 } else { 295 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on " 296 "passphrase"); 297 if (hostapd_derive_psk(ssid) < 0) 298 return -1; 299 } 300 ssid->wpa_psk->group = 1; 301 } 302 303 if (ssid->wpa_psk_file) { 304 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file, 305 &conf->ssid)) 306 return -1; 307 } 308 309 return 0; 310 } 311 312 313 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b) 314 { 315 int i; 316 317 if (a->idx != b->idx || a->default_len != b->default_len) 318 return 1; 319 for (i = 0; i < NUM_WEP_KEYS; i++) 320 if (a->len[i] != b->len[i] || 321 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0) 322 return 1; 323 return 0; 324 } 325 326 327 static void hostapd_config_free_radius(struct hostapd_radius_server *servers, 328 int num_servers) 329 { 330 int i; 331 332 for (i = 0; i < num_servers; i++) { 333 os_free(servers[i].shared_secret); 334 } 335 os_free(servers); 336 } 337 338 339 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user) 340 { 341 os_free(user->identity); 342 os_free(user->password); 343 os_free(user); 344 } 345 346 347 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys) 348 { 349 int i; 350 for (i = 0; i < NUM_WEP_KEYS; i++) { 351 os_free(keys->key[i]); 352 keys->key[i] = NULL; 353 } 354 } 355 356 357 static void hostapd_config_free_bss(struct hostapd_bss_config *conf) 358 { 359 struct hostapd_wpa_psk *psk, *prev; 360 struct hostapd_eap_user *user, *prev_user; 361 362 if (conf == NULL) 363 return; 364 365 psk = conf->ssid.wpa_psk; 366 while (psk) { 367 prev = psk; 368 psk = psk->next; 369 os_free(prev); 370 } 371 372 os_free(conf->ssid.wpa_passphrase); 373 os_free(conf->ssid.wpa_psk_file); 374 hostapd_config_free_wep(&conf->ssid.wep); 375 #ifdef CONFIG_FULL_DYNAMIC_VLAN 376 os_free(conf->ssid.vlan_tagged_interface); 377 #endif /* CONFIG_FULL_DYNAMIC_VLAN */ 378 379 user = conf->eap_user; 380 while (user) { 381 prev_user = user; 382 user = user->next; 383 hostapd_config_free_eap_user(prev_user); 384 } 385 386 os_free(conf->dump_log_name); 387 os_free(conf->eap_req_id_text); 388 os_free(conf->accept_mac); 389 os_free(conf->deny_mac); 390 os_free(conf->nas_identifier); 391 hostapd_config_free_radius(conf->radius->auth_servers, 392 conf->radius->num_auth_servers); 393 hostapd_config_free_radius(conf->radius->acct_servers, 394 conf->radius->num_acct_servers); 395 os_free(conf->rsn_preauth_interfaces); 396 os_free(conf->ctrl_interface); 397 os_free(conf->ca_cert); 398 os_free(conf->server_cert); 399 os_free(conf->private_key); 400 os_free(conf->private_key_passwd); 401 os_free(conf->dh_file); 402 os_free(conf->pac_opaque_encr_key); 403 os_free(conf->eap_fast_a_id); 404 os_free(conf->eap_fast_a_id_info); 405 os_free(conf->eap_sim_db); 406 os_free(conf->radius_server_clients); 407 os_free(conf->test_socket); 408 os_free(conf->radius); 409 hostapd_config_free_vlan(conf); 410 if (conf->ssid.dyn_vlan_keys) { 411 struct hostapd_ssid *ssid = &conf->ssid; 412 size_t i; 413 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) { 414 if (ssid->dyn_vlan_keys[i] == NULL) 415 continue; 416 hostapd_config_free_wep(ssid->dyn_vlan_keys[i]); 417 os_free(ssid->dyn_vlan_keys[i]); 418 } 419 os_free(ssid->dyn_vlan_keys); 420 ssid->dyn_vlan_keys = NULL; 421 } 422 423 os_free(conf->time_zone); 424 425 #ifdef CONFIG_IEEE80211R 426 { 427 struct ft_remote_r0kh *r0kh, *r0kh_prev; 428 struct ft_remote_r1kh *r1kh, *r1kh_prev; 429 430 r0kh = conf->r0kh_list; 431 conf->r0kh_list = NULL; 432 while (r0kh) { 433 r0kh_prev = r0kh; 434 r0kh = r0kh->next; 435 os_free(r0kh_prev); 436 } 437 438 r1kh = conf->r1kh_list; 439 conf->r1kh_list = NULL; 440 while (r1kh) { 441 r1kh_prev = r1kh; 442 r1kh = r1kh->next; 443 os_free(r1kh_prev); 444 } 445 } 446 #endif /* CONFIG_IEEE80211R */ 447 448 #ifdef ANDROID_P2P 449 os_free(conf->prioritize); 450 #endif 451 #ifdef CONFIG_WPS 452 os_free(conf->wps_pin_requests); 453 os_free(conf->device_name); 454 os_free(conf->manufacturer); 455 os_free(conf->model_name); 456 os_free(conf->model_number); 457 os_free(conf->serial_number); 458 os_free(conf->config_methods); 459 os_free(conf->ap_pin); 460 os_free(conf->extra_cred); 461 os_free(conf->ap_settings); 462 os_free(conf->upnp_iface); 463 os_free(conf->friendly_name); 464 os_free(conf->manufacturer_url); 465 os_free(conf->model_description); 466 os_free(conf->model_url); 467 os_free(conf->upc); 468 #endif /* CONFIG_WPS */ 469 470 os_free(conf->roaming_consortium); 471 472 #ifdef CONFIG_RADIUS_TEST 473 os_free(conf->dump_msk_file); 474 #endif /* CONFIG_RADIUS_TEST */ 475 } 476 477 478 /** 479 * hostapd_config_free - Free hostapd configuration 480 * @conf: Configuration data from hostapd_config_read(). 481 */ 482 void hostapd_config_free(struct hostapd_config *conf) 483 { 484 size_t i; 485 486 if (conf == NULL) 487 return; 488 489 for (i = 0; i < conf->num_bss; i++) 490 hostapd_config_free_bss(&conf->bss[i]); 491 os_free(conf->bss); 492 os_free(conf->supported_rates); 493 os_free(conf->basic_rates); 494 495 os_free(conf); 496 } 497 498 499 /** 500 * hostapd_maclist_found - Find a MAC address from a list 501 * @list: MAC address list 502 * @num_entries: Number of addresses in the list 503 * @addr: Address to search for 504 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed 505 * Returns: 1 if address is in the list or 0 if not. 506 * 507 * Perform a binary search for given MAC address from a pre-sorted list. 508 */ 509 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries, 510 const u8 *addr, int *vlan_id) 511 { 512 int start, end, middle, res; 513 514 start = 0; 515 end = num_entries - 1; 516 517 while (start <= end) { 518 middle = (start + end) / 2; 519 res = os_memcmp(list[middle].addr, addr, ETH_ALEN); 520 if (res == 0) { 521 if (vlan_id) 522 *vlan_id = list[middle].vlan_id; 523 return 1; 524 } 525 if (res < 0) 526 start = middle + 1; 527 else 528 end = middle - 1; 529 } 530 531 return 0; 532 } 533 534 535 int hostapd_rate_found(int *list, int rate) 536 { 537 int i; 538 539 if (list == NULL) 540 return 0; 541 542 for (i = 0; list[i] >= 0; i++) 543 if (list[i] == rate) 544 return 1; 545 546 return 0; 547 } 548 549 550 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id) 551 { 552 struct hostapd_vlan *v = vlan; 553 while (v) { 554 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD) 555 return v->ifname; 556 v = v->next; 557 } 558 return NULL; 559 } 560 561 562 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf, 563 const u8 *addr, const u8 *prev_psk) 564 { 565 struct hostapd_wpa_psk *psk; 566 int next_ok = prev_psk == NULL; 567 568 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) { 569 if (next_ok && 570 (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0)) 571 return psk->psk; 572 573 if (psk->psk == prev_psk) 574 next_ok = 1; 575 } 576 577 return NULL; 578 } 579 580 581 const struct hostapd_eap_user * 582 hostapd_get_eap_user(const struct hostapd_bss_config *conf, const u8 *identity, 583 size_t identity_len, int phase2) 584 { 585 struct hostapd_eap_user *user = conf->eap_user; 586 587 #ifdef CONFIG_WPS 588 if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN && 589 os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) { 590 static struct hostapd_eap_user wsc_enrollee; 591 os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee)); 592 wsc_enrollee.methods[0].method = eap_server_get_type( 593 "WSC", &wsc_enrollee.methods[0].vendor); 594 return &wsc_enrollee; 595 } 596 597 if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN && 598 os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) { 599 static struct hostapd_eap_user wsc_registrar; 600 os_memset(&wsc_registrar, 0, sizeof(wsc_registrar)); 601 wsc_registrar.methods[0].method = eap_server_get_type( 602 "WSC", &wsc_registrar.methods[0].vendor); 603 wsc_registrar.password = (u8 *) conf->ap_pin; 604 wsc_registrar.password_len = conf->ap_pin ? 605 os_strlen(conf->ap_pin) : 0; 606 return &wsc_registrar; 607 } 608 #endif /* CONFIG_WPS */ 609 610 while (user) { 611 if (!phase2 && user->identity == NULL) { 612 /* Wildcard match */ 613 break; 614 } 615 616 if (user->phase2 == !!phase2 && user->wildcard_prefix && 617 identity_len >= user->identity_len && 618 os_memcmp(user->identity, identity, user->identity_len) == 619 0) { 620 /* Wildcard prefix match */ 621 break; 622 } 623 624 if (user->phase2 == !!phase2 && 625 user->identity_len == identity_len && 626 os_memcmp(user->identity, identity, identity_len) == 0) 627 break; 628 user = user->next; 629 } 630 631 return user; 632 } 633
