1 /* 2 * hostapd / Configuration helper functions 3 * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #include "utils/includes.h" 16 17 #include "utils/common.h" 18 #include "crypto/sha1.h" 19 #include "radius/radius_client.h" 20 #include "common/ieee802_11_defs.h" 21 #include "common/eapol_common.h" 22 #include "eap_common/eap_wsc_common.h" 23 #include "eap_server/eap.h" 24 #include "wpa_auth.h" 25 #include "sta_info.h" 26 #include "ap_config.h" 27 28 29 static void hostapd_config_free_vlan(struct hostapd_bss_config *bss) 30 { 31 struct hostapd_vlan *vlan, *prev; 32 33 vlan = bss->vlan; 34 prev = NULL; 35 while (vlan) { 36 prev = vlan; 37 vlan = vlan->next; 38 os_free(prev); 39 } 40 41 bss->vlan = NULL; 42 } 43 44 45 void hostapd_config_defaults_bss(struct hostapd_bss_config *bss) 46 { 47 bss->logger_syslog_level = HOSTAPD_LEVEL_INFO; 48 bss->logger_stdout_level = HOSTAPD_LEVEL_INFO; 49 bss->logger_syslog = (unsigned int) -1; 50 bss->logger_stdout = (unsigned int) -1; 51 52 bss->auth_algs = WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED; 53 54 bss->wep_rekeying_period = 300; 55 /* use key0 in individual key and key1 in broadcast key */ 56 bss->broadcast_key_idx_min = 1; 57 bss->broadcast_key_idx_max = 2; 58 bss->eap_reauth_period = 3600; 59 60 bss->wpa_group_rekey = 600; 61 bss->wpa_gmk_rekey = 86400; 62 bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK; 63 bss->wpa_pairwise = WPA_CIPHER_TKIP; 64 bss->wpa_group = WPA_CIPHER_TKIP; 65 bss->rsn_pairwise = 0; 66 67 bss->max_num_sta = MAX_STA_COUNT; 68 69 bss->dtim_period = 2; 70 71 bss->radius_server_auth_port = 1812; 72 bss->ap_max_inactivity = AP_MAX_INACTIVITY; 73 bss->eapol_version = EAPOL_VERSION; 74 75 bss->max_listen_interval = 65535; 76 77 #ifdef CONFIG_IEEE80211W 78 bss->assoc_sa_query_max_timeout = 1000; 79 bss->assoc_sa_query_retry_timeout = 201; 80 #endif /* CONFIG_IEEE80211W */ 81 #ifdef EAP_SERVER_FAST 82 /* both anonymous and authenticated provisioning */ 83 bss->eap_fast_prov = 3; 84 bss->pac_key_lifetime = 7 * 24 * 60 * 60; 85 bss->pac_key_refresh_time = 1 * 24 * 60 * 60; 86 #endif /* EAP_SERVER_FAST */ 87 } 88 89 90 struct hostapd_config * hostapd_config_defaults(void) 91 { 92 struct hostapd_config *conf; 93 struct hostapd_bss_config *bss; 94 int i; 95 const int aCWmin = 4, aCWmax = 10; 96 const struct hostapd_wmm_ac_params ac_bk = 97 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */ 98 const struct hostapd_wmm_ac_params ac_be = 99 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */ 100 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */ 101 { aCWmin - 1, aCWmin, 2, 3000 / 32, 1 }; 102 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */ 103 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 1 }; 104 105 conf = os_zalloc(sizeof(*conf)); 106 bss = os_zalloc(sizeof(*bss)); 107 if (conf == NULL || bss == NULL) { 108 wpa_printf(MSG_ERROR, "Failed to allocate memory for " 109 "configuration data."); 110 os_free(conf); 111 os_free(bss); 112 return NULL; 113 } 114 115 bss->radius = os_zalloc(sizeof(*bss->radius)); 116 if (bss->radius == NULL) { 117 os_free(conf); 118 os_free(bss); 119 return NULL; 120 } 121 122 hostapd_config_defaults_bss(bss); 123 124 conf->num_bss = 1; 125 conf->bss = bss; 126 127 conf->beacon_int = 100; 128 conf->rts_threshold = -1; /* use driver default: 2347 */ 129 conf->fragm_threshold = -1; /* user driver default: 2346 */ 130 conf->send_probe_response = 1; 131 132 for (i = 0; i < NUM_TX_QUEUES; i++) 133 conf->tx_queue[i].aifs = -1; /* use hw default */ 134 135 conf->wmm_ac_params[0] = ac_be; 136 conf->wmm_ac_params[1] = ac_bk; 137 conf->wmm_ac_params[2] = ac_vi; 138 conf->wmm_ac_params[3] = ac_vo; 139 140 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED; 141 142 return conf; 143 } 144 145 146 int hostapd_mac_comp(const void *a, const void *b) 147 { 148 return os_memcmp(a, b, sizeof(macaddr)); 149 } 150 151 152 int hostapd_mac_comp_empty(const void *a) 153 { 154 macaddr empty = { 0 }; 155 return os_memcmp(a, empty, sizeof(macaddr)); 156 } 157 158 159 static int hostapd_config_read_wpa_psk(const char *fname, 160 struct hostapd_ssid *ssid) 161 { 162 FILE *f; 163 char buf[128], *pos; 164 int line = 0, ret = 0, len, ok; 165 u8 addr[ETH_ALEN]; 166 struct hostapd_wpa_psk *psk; 167 168 if (!fname) 169 return 0; 170 171 f = fopen(fname, "r"); 172 if (!f) { 173 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname); 174 return -1; 175 } 176 177 while (fgets(buf, sizeof(buf), f)) { 178 line++; 179 180 if (buf[0] == '#') 181 continue; 182 pos = buf; 183 while (*pos != '\0') { 184 if (*pos == '\n') { 185 *pos = '\0'; 186 break; 187 } 188 pos++; 189 } 190 if (buf[0] == '\0') 191 continue; 192 193 if (hwaddr_aton(buf, addr)) { 194 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on " 195 "line %d in '%s'", buf, line, fname); 196 ret = -1; 197 break; 198 } 199 200 psk = os_zalloc(sizeof(*psk)); 201 if (psk == NULL) { 202 wpa_printf(MSG_ERROR, "WPA PSK allocation failed"); 203 ret = -1; 204 break; 205 } 206 if (is_zero_ether_addr(addr)) 207 psk->group = 1; 208 else 209 os_memcpy(psk->addr, addr, ETH_ALEN); 210 211 pos = buf + 17; 212 if (*pos == '\0') { 213 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'", 214 line, fname); 215 os_free(psk); 216 ret = -1; 217 break; 218 } 219 pos++; 220 221 ok = 0; 222 len = os_strlen(pos); 223 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0) 224 ok = 1; 225 else if (len >= 8 && len < 64) { 226 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len, 227 4096, psk->psk, PMK_LEN); 228 ok = 1; 229 } 230 if (!ok) { 231 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in " 232 "'%s'", pos, line, fname); 233 os_free(psk); 234 ret = -1; 235 break; 236 } 237 238 psk->next = ssid->wpa_psk; 239 ssid->wpa_psk = psk; 240 } 241 242 fclose(f); 243 244 return ret; 245 } 246 247 248 static int hostapd_derive_psk(struct hostapd_ssid *ssid) 249 { 250 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk)); 251 if (ssid->wpa_psk == NULL) { 252 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK"); 253 return -1; 254 } 255 wpa_hexdump_ascii(MSG_DEBUG, "SSID", 256 (u8 *) ssid->ssid, ssid->ssid_len); 257 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)", 258 (u8 *) ssid->wpa_passphrase, 259 os_strlen(ssid->wpa_passphrase)); 260 pbkdf2_sha1(ssid->wpa_passphrase, 261 ssid->ssid, ssid->ssid_len, 262 4096, ssid->wpa_psk->psk, PMK_LEN); 263 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)", 264 ssid->wpa_psk->psk, PMK_LEN); 265 return 0; 266 } 267 268 269 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf) 270 { 271 struct hostapd_ssid *ssid = &conf->ssid; 272 273 if (ssid->wpa_passphrase != NULL) { 274 if (ssid->wpa_psk != NULL) { 275 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK " 276 "instead of passphrase"); 277 } else { 278 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on " 279 "passphrase"); 280 if (hostapd_derive_psk(ssid) < 0) 281 return -1; 282 } 283 ssid->wpa_psk->group = 1; 284 } 285 286 if (ssid->wpa_psk_file) { 287 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file, 288 &conf->ssid)) 289 return -1; 290 } 291 292 return 0; 293 } 294 295 296 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b) 297 { 298 int i; 299 300 if (a->idx != b->idx || a->default_len != b->default_len) 301 return 1; 302 for (i = 0; i < NUM_WEP_KEYS; i++) 303 if (a->len[i] != b->len[i] || 304 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0) 305 return 1; 306 return 0; 307 } 308 309 310 static void hostapd_config_free_radius(struct hostapd_radius_server *servers, 311 int num_servers) 312 { 313 int i; 314 315 for (i = 0; i < num_servers; i++) { 316 os_free(servers[i].shared_secret); 317 } 318 os_free(servers); 319 } 320 321 322 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user) 323 { 324 os_free(user->identity); 325 os_free(user->password); 326 os_free(user); 327 } 328 329 330 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys) 331 { 332 int i; 333 for (i = 0; i < NUM_WEP_KEYS; i++) { 334 os_free(keys->key[i]); 335 keys->key[i] = NULL; 336 } 337 } 338 339 340 static void hostapd_config_free_bss(struct hostapd_bss_config *conf) 341 { 342 struct hostapd_wpa_psk *psk, *prev; 343 struct hostapd_eap_user *user, *prev_user; 344 345 if (conf == NULL) 346 return; 347 348 psk = conf->ssid.wpa_psk; 349 while (psk) { 350 prev = psk; 351 psk = psk->next; 352 os_free(prev); 353 } 354 355 os_free(conf->ssid.wpa_passphrase); 356 os_free(conf->ssid.wpa_psk_file); 357 #ifdef CONFIG_FULL_DYNAMIC_VLAN 358 os_free(conf->ssid.vlan_tagged_interface); 359 #endif /* CONFIG_FULL_DYNAMIC_VLAN */ 360 361 user = conf->eap_user; 362 while (user) { 363 prev_user = user; 364 user = user->next; 365 hostapd_config_free_eap_user(prev_user); 366 } 367 368 os_free(conf->dump_log_name); 369 os_free(conf->eap_req_id_text); 370 os_free(conf->accept_mac); 371 os_free(conf->deny_mac); 372 os_free(conf->nas_identifier); 373 hostapd_config_free_radius(conf->radius->auth_servers, 374 conf->radius->num_auth_servers); 375 hostapd_config_free_radius(conf->radius->acct_servers, 376 conf->radius->num_acct_servers); 377 os_free(conf->rsn_preauth_interfaces); 378 os_free(conf->ctrl_interface); 379 os_free(conf->ca_cert); 380 os_free(conf->server_cert); 381 os_free(conf->private_key); 382 os_free(conf->private_key_passwd); 383 os_free(conf->dh_file); 384 os_free(conf->pac_opaque_encr_key); 385 os_free(conf->eap_fast_a_id); 386 os_free(conf->eap_fast_a_id_info); 387 os_free(conf->eap_sim_db); 388 os_free(conf->radius_server_clients); 389 os_free(conf->test_socket); 390 os_free(conf->radius); 391 hostapd_config_free_vlan(conf); 392 if (conf->ssid.dyn_vlan_keys) { 393 struct hostapd_ssid *ssid = &conf->ssid; 394 size_t i; 395 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) { 396 if (ssid->dyn_vlan_keys[i] == NULL) 397 continue; 398 hostapd_config_free_wep(ssid->dyn_vlan_keys[i]); 399 os_free(ssid->dyn_vlan_keys[i]); 400 } 401 os_free(ssid->dyn_vlan_keys); 402 ssid->dyn_vlan_keys = NULL; 403 } 404 405 #ifdef CONFIG_IEEE80211R 406 { 407 struct ft_remote_r0kh *r0kh, *r0kh_prev; 408 struct ft_remote_r1kh *r1kh, *r1kh_prev; 409 410 r0kh = conf->r0kh_list; 411 conf->r0kh_list = NULL; 412 while (r0kh) { 413 r0kh_prev = r0kh; 414 r0kh = r0kh->next; 415 os_free(r0kh_prev); 416 } 417 418 r1kh = conf->r1kh_list; 419 conf->r1kh_list = NULL; 420 while (r1kh) { 421 r1kh_prev = r1kh; 422 r1kh = r1kh->next; 423 os_free(r1kh_prev); 424 } 425 } 426 #endif /* CONFIG_IEEE80211R */ 427 428 #ifdef CONFIG_WPS 429 os_free(conf->wps_pin_requests); 430 os_free(conf->device_name); 431 os_free(conf->manufacturer); 432 os_free(conf->model_name); 433 os_free(conf->model_number); 434 os_free(conf->serial_number); 435 os_free(conf->device_type); 436 os_free(conf->config_methods); 437 os_free(conf->ap_pin); 438 os_free(conf->extra_cred); 439 os_free(conf->ap_settings); 440 os_free(conf->upnp_iface); 441 os_free(conf->friendly_name); 442 os_free(conf->manufacturer_url); 443 os_free(conf->model_description); 444 os_free(conf->model_url); 445 os_free(conf->upc); 446 #endif /* CONFIG_WPS */ 447 } 448 449 450 /** 451 * hostapd_config_free - Free hostapd configuration 452 * @conf: Configuration data from hostapd_config_read(). 453 */ 454 void hostapd_config_free(struct hostapd_config *conf) 455 { 456 size_t i; 457 458 if (conf == NULL) 459 return; 460 461 for (i = 0; i < conf->num_bss; i++) 462 hostapd_config_free_bss(&conf->bss[i]); 463 os_free(conf->bss); 464 os_free(conf->supported_rates); 465 os_free(conf->basic_rates); 466 467 os_free(conf); 468 } 469 470 471 /** 472 * hostapd_maclist_found - Find a MAC address from a list 473 * @list: MAC address list 474 * @num_entries: Number of addresses in the list 475 * @addr: Address to search for 476 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed 477 * Returns: 1 if address is in the list or 0 if not. 478 * 479 * Perform a binary search for given MAC address from a pre-sorted list. 480 */ 481 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries, 482 const u8 *addr, int *vlan_id) 483 { 484 int start, end, middle, res; 485 486 start = 0; 487 end = num_entries - 1; 488 489 while (start <= end) { 490 middle = (start + end) / 2; 491 res = os_memcmp(list[middle].addr, addr, ETH_ALEN); 492 if (res == 0) { 493 if (vlan_id) 494 *vlan_id = list[middle].vlan_id; 495 return 1; 496 } 497 if (res < 0) 498 start = middle + 1; 499 else 500 end = middle - 1; 501 } 502 503 return 0; 504 } 505 506 507 int hostapd_rate_found(int *list, int rate) 508 { 509 int i; 510 511 if (list == NULL) 512 return 0; 513 514 for (i = 0; list[i] >= 0; i++) 515 if (list[i] == rate) 516 return 1; 517 518 return 0; 519 } 520 521 522 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id) 523 { 524 struct hostapd_vlan *v = vlan; 525 while (v) { 526 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD) 527 return v->ifname; 528 v = v->next; 529 } 530 return NULL; 531 } 532 533 534 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf, 535 const u8 *addr, const u8 *prev_psk) 536 { 537 struct hostapd_wpa_psk *psk; 538 int next_ok = prev_psk == NULL; 539 540 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) { 541 if (next_ok && 542 (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0)) 543 return psk->psk; 544 545 if (psk->psk == prev_psk) 546 next_ok = 1; 547 } 548 549 return NULL; 550 } 551 552 553 const struct hostapd_eap_user * 554 hostapd_get_eap_user(const struct hostapd_bss_config *conf, const u8 *identity, 555 size_t identity_len, int phase2) 556 { 557 struct hostapd_eap_user *user = conf->eap_user; 558 559 #ifdef CONFIG_WPS 560 if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN && 561 os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) { 562 static struct hostapd_eap_user wsc_enrollee; 563 os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee)); 564 wsc_enrollee.methods[0].method = eap_server_get_type( 565 "WSC", &wsc_enrollee.methods[0].vendor); 566 return &wsc_enrollee; 567 } 568 569 if (conf->wps_state && conf->ap_pin && 570 identity_len == WSC_ID_REGISTRAR_LEN && 571 os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) { 572 static struct hostapd_eap_user wsc_registrar; 573 os_memset(&wsc_registrar, 0, sizeof(wsc_registrar)); 574 wsc_registrar.methods[0].method = eap_server_get_type( 575 "WSC", &wsc_registrar.methods[0].vendor); 576 wsc_registrar.password = (u8 *) conf->ap_pin; 577 wsc_registrar.password_len = os_strlen(conf->ap_pin); 578 return &wsc_registrar; 579 } 580 #endif /* CONFIG_WPS */ 581 582 while (user) { 583 if (!phase2 && user->identity == NULL) { 584 /* Wildcard match */ 585 break; 586 } 587 588 if (user->phase2 == !!phase2 && user->wildcard_prefix && 589 identity_len >= user->identity_len && 590 os_memcmp(user->identity, identity, user->identity_len) == 591 0) { 592 /* Wildcard prefix match */ 593 break; 594 } 595 596 if (user->phase2 == !!phase2 && 597 user->identity_len == identity_len && 598 os_memcmp(user->identity, identity, identity_len) == 0) 599 break; 600 user = user->next; 601 } 602 603 return user; 604 } 605