www.project-moonshot.org Git - mech_eap.orig/blob - src/ap/ap_config.c

   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         bss->pwd_group = 19; /* ECC: GF(p=256) */
  78
  79 #ifdef CONFIG_IEEE80211W
  80         bss->assoc_sa_query_max_timeout = 1000;
  81         bss->assoc_sa_query_retry_timeout = 201;
  82 #endif /* CONFIG_IEEE80211W */
  83 #ifdef EAP_SERVER_FAST
  84          /* both anonymous and authenticated provisioning */
  85         bss->eap_fast_prov = 3;
  86         bss->pac_key_lifetime = 7 * 24 * 60 * 60;
  87         bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
  88 #endif /* EAP_SERVER_FAST */
  89 }
  90
  91
  92 struct hostapd_config * hostapd_config_defaults(void)
  93 {
  94         struct hostapd_config *conf;
  95         struct hostapd_bss_config *bss;
  96         int i;
  97         const int aCWmin = 4, aCWmax = 10;
  98         const struct hostapd_wmm_ac_params ac_bk =
  99                 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */
 100         const struct hostapd_wmm_ac_params ac_be =
 101                 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */
 102         const struct hostapd_wmm_ac_params ac_vi = /* video traffic */
 103                 { aCWmin - 1, aCWmin, 2, 3000 / 32, 1 };
 104         const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */
 105                 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 1 };
 106
 107         conf = os_zalloc(sizeof(*conf));
 108         bss = os_zalloc(sizeof(*bss));
 109         if (conf == NULL || bss == NULL) {
 110                 wpa_printf(MSG_ERROR, "Failed to allocate memory for "
 111                            "configuration data.");
 112                 os_free(conf);
 113                 os_free(bss);
 114                 return NULL;
 115         }
 116
 117         bss->radius = os_zalloc(sizeof(*bss->radius));
 118         if (bss->radius == NULL) {
 119                 os_free(conf);
 120                 os_free(bss);
 121                 return NULL;
 122         }
 123
 124         hostapd_config_defaults_bss(bss);
 125
 126         conf->num_bss = 1;
 127         conf->bss = bss;
 128
 129         conf->beacon_int = 100;
 130         conf->rts_threshold = -1; /* use driver default: 2347 */
 131         conf->fragm_threshold = -1; /* user driver default: 2346 */
 132         conf->send_probe_response = 1;
 133
 134         for (i = 0; i < NUM_TX_QUEUES; i++)
 135                 conf->tx_queue[i].aifs = -1; /* use hw default */
 136
 137         conf->wmm_ac_params[0] = ac_be;
 138         conf->wmm_ac_params[1] = ac_bk;
 139         conf->wmm_ac_params[2] = ac_vi;
 140         conf->wmm_ac_params[3] = ac_vo;
 141
 142         conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
 143
 144         return conf;
 145 }
 146
 147
 148 int hostapd_mac_comp(const void *a, const void *b)
 149 {
 150         return os_memcmp(a, b, sizeof(macaddr));
 151 }
 152
 153
 154 int hostapd_mac_comp_empty(const void *a)
 155 {
 156         macaddr empty = { 0 };
 157         return os_memcmp(a, empty, sizeof(macaddr));
 158 }
 159
 160
 161 static int hostapd_config_read_wpa_psk(const char *fname,
 162                                        struct hostapd_ssid *ssid)
 163 {
 164         FILE *f;
 165         char buf[128], *pos;
 166         int line = 0, ret = 0, len, ok;
 167         u8 addr[ETH_ALEN];
 168         struct hostapd_wpa_psk *psk;
 169
 170         if (!fname)
 171                 return 0;
 172
 173         f = fopen(fname, "r");
 174         if (!f) {
 175                 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
 176                 return -1;
 177         }
 178
 179         while (fgets(buf, sizeof(buf), f)) {
 180                 line++;
 181
 182                 if (buf[0] == '#')
 183                         continue;
 184                 pos = buf;
 185                 while (*pos != '\0') {
 186                         if (*pos == '\n') {
 187                                 *pos = '\0';
 188                                 break;
 189                         }
 190                         pos++;
 191                 }
 192                 if (buf[0] == '\0')
 193                         continue;
 194
 195                 if (hwaddr_aton(buf, addr)) {
 196                         wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
 197                                    "line %d in '%s'", buf, line, fname);
 198                         ret = -1;
 199                         break;
 200                 }
 201
 202                 psk = os_zalloc(sizeof(*psk));
 203                 if (psk == NULL) {
 204                         wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
 205                         ret = -1;
 206                         break;
 207                 }
 208                 if (is_zero_ether_addr(addr))
 209                         psk->group = 1;
 210                 else
 211                         os_memcpy(psk->addr, addr, ETH_ALEN);
 212
 213                 pos = buf + 17;
 214                 if (*pos == '\0') {
 215                         wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
 216                                    line, fname);
 217                         os_free(psk);
 218                         ret = -1;
 219                         break;
 220                 }
 221                 pos++;
 222
 223                 ok = 0;
 224                 len = os_strlen(pos);
 225                 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
 226                         ok = 1;
 227                 else if (len >= 8 && len < 64) {
 228                         pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
 229                                     4096, psk->psk, PMK_LEN);
 230                         ok = 1;
 231                 }
 232                 if (!ok) {
 233                         wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
 234                                    "'%s'", pos, line, fname);
 235                         os_free(psk);
 236                         ret = -1;
 237                         break;
 238                 }
 239
 240                 psk->next = ssid->wpa_psk;
 241                 ssid->wpa_psk = psk;
 242         }
 243
 244         fclose(f);
 245
 246         return ret;
 247 }
 248
 249
 250 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
 251 {
 252         ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 253         if (ssid->wpa_psk == NULL) {
 254                 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
 255                 return -1;
 256         }
 257         wpa_hexdump_ascii(MSG_DEBUG, "SSID",
 258                           (u8 *) ssid->ssid, ssid->ssid_len);
 259         wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
 260                               (u8 *) ssid->wpa_passphrase,
 261                               os_strlen(ssid->wpa_passphrase));
 262         pbkdf2_sha1(ssid->wpa_passphrase,
 263                     ssid->ssid, ssid->ssid_len,
 264                     4096, ssid->wpa_psk->psk, PMK_LEN);
 265         wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
 266                         ssid->wpa_psk->psk, PMK_LEN);
 267         return 0;
 268 }
 269
 270
 271 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
 272 {
 273         struct hostapd_ssid *ssid = &conf->ssid;
 274
 275         if (ssid->wpa_passphrase != NULL) {
 276                 if (ssid->wpa_psk != NULL) {
 277                         wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
 278                                    "instead of passphrase");
 279                 } else {
 280                         wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
 281                                    "passphrase");
 282                         if (hostapd_derive_psk(ssid) < 0)
 283                                 return -1;
 284                 }
 285                 ssid->wpa_psk->group = 1;
 286         }
 287
 288         if (ssid->wpa_psk_file) {
 289                 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
 290                                                 &conf->ssid))
 291                         return -1;
 292         }
 293
 294         return 0;
 295 }
 296
 297
 298 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b)
 299 {
 300         int i;
 301
 302         if (a->idx != b->idx || a->default_len != b->default_len)
 303                 return 1;
 304         for (i = 0; i < NUM_WEP_KEYS; i++)
 305                 if (a->len[i] != b->len[i] ||
 306                     os_memcmp(a->key[i], b->key[i], a->len[i]) != 0)
 307                         return 1;
 308         return 0;
 309 }
 310
 311
 312 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
 313                                        int num_servers)
 314 {
 315         int i;
 316
 317         for (i = 0; i < num_servers; i++) {
 318                 os_free(servers[i].shared_secret);
 319         }
 320         os_free(servers);
 321 }
 322
 323
 324 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
 325 {
 326         os_free(user->identity);
 327         os_free(user->password);
 328         os_free(user);
 329 }
 330
 331
 332 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
 333 {
 334         int i;
 335         for (i = 0; i < NUM_WEP_KEYS; i++) {
 336                 os_free(keys->key[i]);
 337                 keys->key[i] = NULL;
 338         }
 339 }
 340
 341
 342 static void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 343 {
 344         struct hostapd_wpa_psk *psk, *prev;
 345         struct hostapd_eap_user *user, *prev_user;
 346
 347         if (conf == NULL)
 348                 return;
 349
 350         psk = conf->ssid.wpa_psk;
 351         while (psk) {
 352                 prev = psk;
 353                 psk = psk->next;
 354                 os_free(prev);
 355         }
 356
 357         os_free(conf->ssid.wpa_passphrase);
 358         os_free(conf->ssid.wpa_psk_file);
 359         hostapd_config_free_wep(&conf->ssid.wep);
 360 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 361         os_free(conf->ssid.vlan_tagged_interface);
 362 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 363
 364         user = conf->eap_user;
 365         while (user) {
 366                 prev_user = user;
 367                 user = user->next;
 368                 hostapd_config_free_eap_user(prev_user);
 369         }
 370
 371         os_free(conf->dump_log_name);
 372         os_free(conf->eap_req_id_text);
 373         os_free(conf->accept_mac);
 374         os_free(conf->deny_mac);
 375         os_free(conf->nas_identifier);
 376         hostapd_config_free_radius(conf->radius->auth_servers,
 377                                    conf->radius->num_auth_servers);
 378         hostapd_config_free_radius(conf->radius->acct_servers,
 379                                    conf->radius->num_acct_servers);
 380         os_free(conf->rsn_preauth_interfaces);
 381         os_free(conf->ctrl_interface);
 382         os_free(conf->ca_cert);
 383         os_free(conf->server_cert);
 384         os_free(conf->private_key);
 385         os_free(conf->private_key_passwd);
 386         os_free(conf->dh_file);
 387         os_free(conf->pac_opaque_encr_key);
 388         os_free(conf->eap_fast_a_id);
 389         os_free(conf->eap_fast_a_id_info);
 390         os_free(conf->eap_sim_db);
 391         os_free(conf->radius_server_clients);
 392         os_free(conf->test_socket);
 393         os_free(conf->radius);
 394         hostapd_config_free_vlan(conf);
 395         if (conf->ssid.dyn_vlan_keys) {
 396                 struct hostapd_ssid *ssid = &conf->ssid;
 397                 size_t i;
 398                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 399                         if (ssid->dyn_vlan_keys[i] == NULL)
 400                                 continue;
 401                         hostapd_config_free_wep(ssid->dyn_vlan_keys[i]);
 402                         os_free(ssid->dyn_vlan_keys[i]);
 403                 }
 404                 os_free(ssid->dyn_vlan_keys);
 405                 ssid->dyn_vlan_keys = NULL;
 406         }
 407
 408 #ifdef CONFIG_IEEE80211R
 409         {
 410                 struct ft_remote_r0kh *r0kh, *r0kh_prev;
 411                 struct ft_remote_r1kh *r1kh, *r1kh_prev;
 412
 413                 r0kh = conf->r0kh_list;
 414                 conf->r0kh_list = NULL;
 415                 while (r0kh) {
 416                         r0kh_prev = r0kh;
 417                         r0kh = r0kh->next;
 418                         os_free(r0kh_prev);
 419                 }
 420
 421                 r1kh = conf->r1kh_list;
 422                 conf->r1kh_list = NULL;
 423                 while (r1kh) {
 424                         r1kh_prev = r1kh;
 425                         r1kh = r1kh->next;
 426                         os_free(r1kh_prev);
 427                 }
 428         }
 429 #endif /* CONFIG_IEEE80211R */
 430
 431 #ifdef CONFIG_WPS
 432         os_free(conf->wps_pin_requests);
 433         os_free(conf->device_name);
 434         os_free(conf->manufacturer);
 435         os_free(conf->model_name);
 436         os_free(conf->model_number);
 437         os_free(conf->serial_number);
 438         os_free(conf->device_type);
 439         os_free(conf->config_methods);
 440         os_free(conf->ap_pin);
 441         os_free(conf->extra_cred);
 442         os_free(conf->ap_settings);
 443         os_free(conf->upnp_iface);
 444         os_free(conf->friendly_name);
 445         os_free(conf->manufacturer_url);
 446         os_free(conf->model_description);
 447         os_free(conf->model_url);
 448         os_free(conf->upc);
 449 #endif /* CONFIG_WPS */
 450 }
 451
 452
 453 /**
 454  * hostapd_config_free - Free hostapd configuration
 455  * @conf: Configuration data from hostapd_config_read().
 456  */
 457 void hostapd_config_free(struct hostapd_config *conf)
 458 {
 459         size_t i;
 460
 461         if (conf == NULL)
 462                 return;
 463
 464         for (i = 0; i < conf->num_bss; i++)
 465                 hostapd_config_free_bss(&conf->bss[i]);
 466         os_free(conf->bss);
 467         os_free(conf->supported_rates);
 468         os_free(conf->basic_rates);
 469
 470         os_free(conf);
 471 }
 472
 473
 474 /**
 475  * hostapd_maclist_found - Find a MAC address from a list
 476  * @list: MAC address list
 477  * @num_entries: Number of addresses in the list
 478  * @addr: Address to search for
 479  * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
 480  * Returns: 1 if address is in the list or 0 if not.
 481  *
 482  * Perform a binary search for given MAC address from a pre-sorted list.
 483  */
 484 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
 485                           const u8 *addr, int *vlan_id)
 486 {
 487         int start, end, middle, res;
 488
 489         start = 0;
 490         end = num_entries - 1;
 491
 492         while (start <= end) {
 493                 middle = (start + end) / 2;
 494                 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
 495                 if (res == 0) {
 496                         if (vlan_id)
 497                                 *vlan_id = list[middle].vlan_id;
 498                         return 1;
 499                 }
 500                 if (res < 0)
 501                         start = middle + 1;
 502                 else
 503                         end = middle - 1;
 504         }
 505
 506         return 0;
 507 }
 508
 509
 510 int hostapd_rate_found(int *list, int rate)
 511 {
 512         int i;
 513
 514         if (list == NULL)
 515                 return 0;
 516
 517         for (i = 0; list[i] >= 0; i++)
 518                 if (list[i] == rate)
 519                         return 1;
 520
 521         return 0;
 522 }
 523
 524
 525 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
 526 {
 527         struct hostapd_vlan *v = vlan;
 528         while (v) {
 529                 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
 530                         return v->ifname;
 531                 v = v->next;
 532         }
 533         return NULL;
 534 }
 535
 536
 537 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
 538                            const u8 *addr, const u8 *prev_psk)
 539 {
 540         struct hostapd_wpa_psk *psk;
 541         int next_ok = prev_psk == NULL;
 542
 543         for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
 544                 if (next_ok &&
 545                     (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0))
 546                         return psk->psk;
 547
 548                 if (psk->psk == prev_psk)
 549                         next_ok = 1;
 550         }
 551
 552         return NULL;
 553 }
 554
 555
 556 const struct hostapd_eap_user *
 557 hostapd_get_eap_user(const struct hostapd_bss_config *conf, const u8 *identity,
 558                      size_t identity_len, int phase2)
 559 {
 560         struct hostapd_eap_user *user = conf->eap_user;
 561
 562 #ifdef CONFIG_WPS
 563         if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN &&
 564             os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) {
 565                 static struct hostapd_eap_user wsc_enrollee;
 566                 os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee));
 567                 wsc_enrollee.methods[0].method = eap_server_get_type(
 568                         "WSC", &wsc_enrollee.methods[0].vendor);
 569                 return &wsc_enrollee;
 570         }
 571
 572         if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN &&
 573             os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) {
 574                 static struct hostapd_eap_user wsc_registrar;
 575                 os_memset(&wsc_registrar, 0, sizeof(wsc_registrar));
 576                 wsc_registrar.methods[0].method = eap_server_get_type(
 577                         "WSC", &wsc_registrar.methods[0].vendor);
 578                 wsc_registrar.password = (u8 *) conf->ap_pin;
 579                 wsc_registrar.password_len = conf->ap_pin ?
 580                         os_strlen(conf->ap_pin) : 0;
 581                 return &wsc_registrar;
 582         }
 583 #endif /* CONFIG_WPS */
 584
 585         while (user) {
 586                 if (!phase2 && user->identity == NULL) {
 587                         /* Wildcard match */
 588                         break;
 589                 }
 590
 591                 if (user->phase2 == !!phase2 && user->wildcard_prefix &&
 592                     identity_len >= user->identity_len &&
 593                     os_memcmp(user->identity, identity, user->identity_len) ==
 594                     0) {
 595                         /* Wildcard prefix match */
 596                         break;
 597                 }
 598
 599                 if (user->phase2 == !!phase2 &&
 600                     user->identity_len == identity_len &&
 601                     os_memcmp(user->identity, identity, identity_len) == 0)
 602                         break;
 603                 user = user->next;
 604         }
 605
 606         return user;
 607 }