contrib/wpa/src/ap/ap_config.c

   1 /*
   2  * hostapd / Configuration helper functions
   3  * Copyright (c) 2003-2012, Jouni Malinen <j@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         conf->ap_table_max_size = 255;
 162         conf->ap_table_expiration_time = 60;
 163
 164         return conf;
 165 }
 166
 167
 168 int hostapd_mac_comp(const void *a, const void *b)
 169 {
 170         return os_memcmp(a, b, sizeof(macaddr));
 171 }
 172
 173
 174 int hostapd_mac_comp_empty(const void *a)
 175 {
 176         macaddr empty = { 0 };
 177         return os_memcmp(a, empty, sizeof(macaddr));
 178 }
 179
 180
 181 static int hostapd_config_read_wpa_psk(const char *fname,
 182                                        struct hostapd_ssid *ssid)
 183 {
 184         FILE *f;
 185         char buf[128], *pos;
 186         int line = 0, ret = 0, len, ok;
 187         u8 addr[ETH_ALEN];
 188         struct hostapd_wpa_psk *psk;
 189
 190         if (!fname)
 191                 return 0;
 192
 193         f = fopen(fname, "r");
 194         if (!f) {
 195                 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
 196                 return -1;
 197         }
 198
 199         while (fgets(buf, sizeof(buf), f)) {
 200                 line++;
 201
 202                 if (buf[0] == '#')
 203                         continue;
 204                 pos = buf;
 205                 while (*pos != '\0') {
 206                         if (*pos == '\n') {
 207                                 *pos = '\0';
 208                                 break;
 209                         }
 210                         pos++;
 211                 }
 212                 if (buf[0] == '\0')
 213                         continue;
 214
 215                 if (hwaddr_aton(buf, addr)) {
 216                         wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
 217                                    "line %d in '%s'", buf, line, fname);
 218                         ret = -1;
 219                         break;
 220                 }
 221
 222                 psk = os_zalloc(sizeof(*psk));
 223                 if (psk == NULL) {
 224                         wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
 225                         ret = -1;
 226                         break;
 227                 }
 228                 if (is_zero_ether_addr(addr))
 229                         psk->group = 1;
 230                 else
 231                         os_memcpy(psk->addr, addr, ETH_ALEN);
 232
 233                 pos = buf + 17;
 234                 if (*pos == '\0') {
 235                         wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
 236                                    line, fname);
 237                         os_free(psk);
 238                         ret = -1;
 239                         break;
 240                 }
 241                 pos++;
 242
 243                 ok = 0;
 244                 len = os_strlen(pos);
 245                 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
 246                         ok = 1;
 247                 else if (len >= 8 && len < 64) {
 248                         pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
 249                                     4096, psk->psk, PMK_LEN);
 250                         ok = 1;
 251                 }
 252                 if (!ok) {
 253                         wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
 254                                    "'%s'", pos, line, fname);
 255                         os_free(psk);
 256                         ret = -1;
 257                         break;
 258                 }
 259
 260                 psk->next = ssid->wpa_psk;
 261                 ssid->wpa_psk = psk;
 262         }
 263
 264         fclose(f);
 265
 266         return ret;
 267 }
 268
 269
 270 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
 271 {
 272         ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 273         if (ssid->wpa_psk == NULL) {
 274                 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
 275                 return -1;
 276         }
 277         wpa_hexdump_ascii(MSG_DEBUG, "SSID",
 278                           (u8 *) ssid->ssid, ssid->ssid_len);
 279         wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
 280                               (u8 *) ssid->wpa_passphrase,
 281                               os_strlen(ssid->wpa_passphrase));
 282         pbkdf2_sha1(ssid->wpa_passphrase,
 283                     ssid->ssid, ssid->ssid_len,
 284                     4096, ssid->wpa_psk->psk, PMK_LEN);
 285         wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
 286                         ssid->wpa_psk->psk, PMK_LEN);
 287         return 0;
 288 }
 289
 290
 291 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
 292 {
 293         struct hostapd_ssid *ssid = &conf->ssid;
 294
 295         if (ssid->wpa_passphrase != NULL) {
 296                 if (ssid->wpa_psk != NULL) {
 297                         wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
 298                                    "instead of passphrase");
 299                 } else {
 300                         wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
 301                                    "passphrase");
 302                         if (hostapd_derive_psk(ssid) < 0)
 303                                 return -1;
 304                 }
 305                 ssid->wpa_psk->group = 1;
 306         }
 307
 308         if (ssid->wpa_psk_file) {
 309                 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
 310                                                 &conf->ssid))
 311                         return -1;
 312         }
 313
 314         return 0;
 315 }
 316
 317
 318 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b)
 319 {
 320         int i;
 321
 322         if (a->idx != b->idx || a->default_len != b->default_len)
 323                 return 1;
 324         for (i = 0; i < NUM_WEP_KEYS; i++)
 325                 if (a->len[i] != b->len[i] ||
 326                     os_memcmp(a->key[i], b->key[i], a->len[i]) != 0)
 327                         return 1;
 328         return 0;
 329 }
 330
 331
 332 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
 333                                        int num_servers)
 334 {
 335         int i;
 336
 337         for (i = 0; i < num_servers; i++) {
 338                 os_free(servers[i].shared_secret);
 339         }
 340         os_free(servers);
 341 }
 342
 343
 344 struct hostapd_radius_attr *
 345 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type)
 346 {
 347         for (; attr; attr = attr->next) {
 348                 if (attr->type == type)
 349                         return attr;
 350         }
 351         return NULL;
 352 }
 353
 354
 355 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr)
 356 {
 357         struct hostapd_radius_attr *prev;
 358
 359         while (attr) {
 360                 prev = attr;
 361                 attr = attr->next;
 362                 wpabuf_free(prev->val);
 363                 os_free(prev);
 364         }
 365 }
 366
 367
 368 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
 369 {
 370         os_free(user->identity);
 371         os_free(user->password);
 372         os_free(user);
 373 }
 374
 375
 376 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
 377 {
 378         int i;
 379         for (i = 0; i < NUM_WEP_KEYS; i++) {
 380                 os_free(keys->key[i]);
 381                 keys->key[i] = NULL;
 382         }
 383 }
 384
 385
 386 static void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 387 {
 388         struct hostapd_wpa_psk *psk, *prev;
 389         struct hostapd_eap_user *user, *prev_user;
 390
 391         if (conf == NULL)
 392                 return;
 393
 394         psk = conf->ssid.wpa_psk;
 395         while (psk) {
 396                 prev = psk;
 397                 psk = psk->next;
 398                 os_free(prev);
 399         }
 400
 401         os_free(conf->ssid.wpa_passphrase);
 402         os_free(conf->ssid.wpa_psk_file);
 403         hostapd_config_free_wep(&conf->ssid.wep);
 404 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 405         os_free(conf->ssid.vlan_tagged_interface);
 406 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 407
 408         user = conf->eap_user;
 409         while (user) {
 410                 prev_user = user;
 411                 user = user->next;
 412                 hostapd_config_free_eap_user(prev_user);
 413         }
 414         os_free(conf->eap_user_sqlite);
 415
 416         os_free(conf->dump_log_name);
 417         os_free(conf->eap_req_id_text);
 418         os_free(conf->accept_mac);
 419         os_free(conf->deny_mac);
 420         os_free(conf->nas_identifier);
 421         hostapd_config_free_radius(conf->radius->auth_servers,
 422                                    conf->radius->num_auth_servers);
 423         hostapd_config_free_radius(conf->radius->acct_servers,
 424                                    conf->radius->num_acct_servers);
 425         hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
 426         hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
 427         os_free(conf->rsn_preauth_interfaces);
 428         os_free(conf->ctrl_interface);
 429         os_free(conf->ca_cert);
 430         os_free(conf->server_cert);
 431         os_free(conf->private_key);
 432         os_free(conf->private_key_passwd);
 433         os_free(conf->dh_file);
 434         os_free(conf->pac_opaque_encr_key);
 435         os_free(conf->eap_fast_a_id);
 436         os_free(conf->eap_fast_a_id_info);
 437         os_free(conf->eap_sim_db);
 438         os_free(conf->radius_server_clients);
 439         os_free(conf->test_socket);
 440         os_free(conf->radius);
 441         os_free(conf->radius_das_shared_secret);
 442         hostapd_config_free_vlan(conf);
 443         if (conf->ssid.dyn_vlan_keys) {
 444                 struct hostapd_ssid *ssid = &conf->ssid;
 445                 size_t i;
 446                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 447                         if (ssid->dyn_vlan_keys[i] == NULL)
 448                                 continue;
 449                         hostapd_config_free_wep(ssid->dyn_vlan_keys[i]);
 450                         os_free(ssid->dyn_vlan_keys[i]);
 451                 }
 452                 os_free(ssid->dyn_vlan_keys);
 453                 ssid->dyn_vlan_keys = NULL;
 454         }
 455
 456         os_free(conf->time_zone);
 457
 458 #ifdef CONFIG_IEEE80211R
 459         {
 460                 struct ft_remote_r0kh *r0kh, *r0kh_prev;
 461                 struct ft_remote_r1kh *r1kh, *r1kh_prev;
 462
 463                 r0kh = conf->r0kh_list;
 464                 conf->r0kh_list = NULL;
 465                 while (r0kh) {
 466                         r0kh_prev = r0kh;
 467                         r0kh = r0kh->next;
 468                         os_free(r0kh_prev);
 469                 }
 470
 471                 r1kh = conf->r1kh_list;
 472                 conf->r1kh_list = NULL;
 473                 while (r1kh) {
 474                         r1kh_prev = r1kh;
 475                         r1kh = r1kh->next;
 476                         os_free(r1kh_prev);
 477                 }
 478         }
 479 #endif /* CONFIG_IEEE80211R */
 480
 481 #ifdef CONFIG_WPS
 482         os_free(conf->wps_pin_requests);
 483         os_free(conf->device_name);
 484         os_free(conf->manufacturer);
 485         os_free(conf->model_name);
 486         os_free(conf->model_number);
 487         os_free(conf->serial_number);
 488         os_free(conf->config_methods);
 489         os_free(conf->ap_pin);
 490         os_free(conf->extra_cred);
 491         os_free(conf->ap_settings);
 492         os_free(conf->upnp_iface);
 493         os_free(conf->friendly_name);
 494         os_free(conf->manufacturer_url);
 495         os_free(conf->model_description);
 496         os_free(conf->model_url);
 497         os_free(conf->upc);
 498         wpabuf_free(conf->wps_nfc_dh_pubkey);
 499         wpabuf_free(conf->wps_nfc_dh_privkey);
 500         wpabuf_free(conf->wps_nfc_dev_pw);
 501 #endif /* CONFIG_WPS */
 502
 503         os_free(conf->roaming_consortium);
 504         os_free(conf->venue_name);
 505         os_free(conf->nai_realm_data);
 506         os_free(conf->network_auth_type);
 507         os_free(conf->anqp_3gpp_cell_net);
 508         os_free(conf->domain_name);
 509
 510 #ifdef CONFIG_RADIUS_TEST
 511         os_free(conf->dump_msk_file);
 512 #endif /* CONFIG_RADIUS_TEST */
 513
 514 #ifdef CONFIG_HS20
 515         os_free(conf->hs20_oper_friendly_name);
 516         os_free(conf->hs20_wan_metrics);
 517         os_free(conf->hs20_connection_capability);
 518         os_free(conf->hs20_operating_class);
 519 #endif /* CONFIG_HS20 */
 520
 521         wpabuf_free(conf->vendor_elements);
 522 }
 523
 524
 525 /**
 526  * hostapd_config_free - Free hostapd configuration
 527  * @conf: Configuration data from hostapd_config_read().
 528  */
 529 void hostapd_config_free(struct hostapd_config *conf)
 530 {
 531         size_t i;
 532
 533         if (conf == NULL)
 534                 return;
 535
 536         for (i = 0; i < conf->num_bss; i++)
 537                 hostapd_config_free_bss(&conf->bss[i]);
 538         os_free(conf->bss);
 539         os_free(conf->supported_rates);
 540         os_free(conf->basic_rates);
 541
 542         os_free(conf);
 543 }
 544
 545
 546 /**
 547  * hostapd_maclist_found - Find a MAC address from a list
 548  * @list: MAC address list
 549  * @num_entries: Number of addresses in the list
 550  * @addr: Address to search for
 551  * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
 552  * Returns: 1 if address is in the list or 0 if not.
 553  *
 554  * Perform a binary search for given MAC address from a pre-sorted list.
 555  */
 556 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
 557                           const u8 *addr, int *vlan_id)
 558 {
 559         int start, end, middle, res;
 560
 561         start = 0;
 562         end = num_entries - 1;
 563
 564         while (start <= end) {
 565                 middle = (start + end) / 2;
 566                 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
 567                 if (res == 0) {
 568                         if (vlan_id)
 569                                 *vlan_id = list[middle].vlan_id;
 570                         return 1;
 571                 }
 572                 if (res < 0)
 573                         start = middle + 1;
 574                 else
 575                         end = middle - 1;
 576         }
 577
 578         return 0;
 579 }
 580
 581
 582 int hostapd_rate_found(int *list, int rate)
 583 {
 584         int i;
 585
 586         if (list == NULL)
 587                 return 0;
 588
 589         for (i = 0; list[i] >= 0; i++)
 590                 if (list[i] == rate)
 591                         return 1;
 592
 593         return 0;
 594 }
 595
 596
 597 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
 598 {
 599         struct hostapd_vlan *v = vlan;
 600         while (v) {
 601                 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
 602                         return v->ifname;
 603                 v = v->next;
 604         }
 605         return NULL;
 606 }
 607
 608
 609 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
 610                            const u8 *addr, const u8 *prev_psk)
 611 {
 612         struct hostapd_wpa_psk *psk;
 613         int next_ok = prev_psk == NULL;
 614
 615         for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
 616                 if (next_ok &&
 617                     (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0))
 618                         return psk->psk;
 619
 620                 if (psk->psk == prev_psk)
 621                         next_ok = 1;
 622         }
 623
 624         return NULL;
 625 }