src/ap/wps_hostapd.c

   1 /*
   2  * hostapd / WPS integration
   3  * Copyright (c) 2008-2010, 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 "utils/eloop.h"
  19 #include "utils/uuid.h"
  20 #include "crypto/dh_groups.h"
  21 #include "common/wpa_ctrl.h"
  22 #include "common/ieee802_11_defs.h"
  23 #include "common/ieee802_11_common.h"
  24 #include "eapol_auth/eapol_auth_sm.h"
  25 #include "eapol_auth/eapol_auth_sm_i.h"
  26 #include "wps/wps.h"
  27 #include "wps/wps_defs.h"
  28 #include "wps/wps_dev_attr.h"
  29 #include "hostapd.h"
  30 #include "ap_config.h"
  31 #include "beacon.h"
  32 #include "sta_info.h"
  33 #include "wps_hostapd.h"
  34
  35
  36 #ifdef CONFIG_WPS_UPNP
  37 #include "wps/wps_upnp.h"
  38 static int hostapd_wps_upnp_init(struct hostapd_data *hapd,
  39                                  struct wps_context *wps);
  40 static void hostapd_wps_upnp_deinit(struct hostapd_data *hapd);
  41 #endif /* CONFIG_WPS_UPNP */
  42
  43 static int hostapd_wps_probe_req_rx(void *ctx, const u8 *addr,
  44                                     const u8 *ie, size_t ie_len);
  45 static void hostapd_wps_ap_pin_timeout(void *eloop_data, void *user_ctx);
  46
  47
  48 static int hostapd_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
  49                                   size_t psk_len)
  50 {
  51         struct hostapd_data *hapd = ctx;
  52         struct hostapd_wpa_psk *p;
  53         struct hostapd_ssid *ssid = &hapd->conf->ssid;
  54
  55         wpa_printf(MSG_DEBUG, "Received new WPA/WPA2-PSK from WPS for STA "
  56                    MACSTR, MAC2STR(mac_addr));
  57         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
  58
  59         if (psk_len != PMK_LEN) {
  60                 wpa_printf(MSG_DEBUG, "Unexpected PSK length %lu",
  61                            (unsigned long) psk_len);
  62                 return -1;
  63         }
  64
  65         /* Add the new PSK to runtime PSK list */
  66         p = os_zalloc(sizeof(*p));
  67         if (p == NULL)
  68                 return -1;
  69         os_memcpy(p->addr, mac_addr, ETH_ALEN);
  70         os_memcpy(p->psk, psk, PMK_LEN);
  71
  72         p->next = ssid->wpa_psk;
  73         ssid->wpa_psk = p;
  74
  75         if (ssid->wpa_psk_file) {
  76                 FILE *f;
  77                 char hex[PMK_LEN * 2 + 1];
  78                 /* Add the new PSK to PSK list file */
  79                 f = fopen(ssid->wpa_psk_file, "a");
  80                 if (f == NULL) {
  81                         wpa_printf(MSG_DEBUG, "Failed to add the PSK to "
  82                                    "'%s'", ssid->wpa_psk_file);
  83                         return -1;
  84                 }
  85
  86                 wpa_snprintf_hex(hex, sizeof(hex), psk, psk_len);
  87                 fprintf(f, MACSTR " %s\n", MAC2STR(mac_addr), hex);
  88                 fclose(f);
  89         }
  90
  91         return 0;
  92 }
  93
  94
  95 static int hostapd_wps_set_ie_cb(void *ctx, struct wpabuf *beacon_ie,
  96                                  struct wpabuf *probe_resp_ie)
  97 {
  98         struct hostapd_data *hapd = ctx;
  99         wpabuf_free(hapd->wps_beacon_ie);
 100         hapd->wps_beacon_ie = beacon_ie;
 101         wpabuf_free(hapd->wps_probe_resp_ie);
 102         hapd->wps_probe_resp_ie = probe_resp_ie;
 103         ieee802_11_set_beacon(hapd);
 104         return hapd->drv.set_ap_wps_ie(hapd);
 105 }
 106
 107
 108 static void hostapd_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 109                                       const struct wps_device_data *dev)
 110 {
 111         struct hostapd_data *hapd = ctx;
 112         char uuid[40], txt[400];
 113         int len;
 114         char devtype[WPS_DEV_TYPE_BUFSIZE];
 115         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 116                 return;
 117         wpa_printf(MSG_DEBUG, "WPS: PIN needed for E-UUID %s", uuid);
 118         len = os_snprintf(txt, sizeof(txt), WPS_EVENT_PIN_NEEDED
 119                           "%s " MACSTR " [%s|%s|%s|%s|%s|%s]",
 120                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 121                           dev->manufacturer, dev->model_name,
 122                           dev->model_number, dev->serial_number,
 123                           wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 124                                                sizeof(devtype)));
 125         if (len > 0 && len < (int) sizeof(txt))
 126                 wpa_msg(hapd->msg_ctx, MSG_INFO, "%s", txt);
 127
 128         if (hapd->conf->wps_pin_requests) {
 129                 FILE *f;
 130                 struct os_time t;
 131                 f = fopen(hapd->conf->wps_pin_requests, "a");
 132                 if (f == NULL)
 133                         return;
 134                 os_get_time(&t);
 135                 fprintf(f, "%ld\t%s\t" MACSTR "\t%s\t%s\t%s\t%s\t%s"
 136                         "\t%s\n",
 137                         t.sec, uuid, MAC2STR(dev->mac_addr), dev->device_name,
 138                         dev->manufacturer, dev->model_name, dev->model_number,
 139                         dev->serial_number,
 140                         wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 141                                              sizeof(devtype)));
 142                 fclose(f);
 143         }
 144 }
 145
 146
 147 static void hostapd_wps_reg_success_cb(void *ctx, const u8 *mac_addr,
 148                                        const u8 *uuid_e)
 149 {
 150         struct hostapd_data *hapd = ctx;
 151         char uuid[40];
 152         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 153                 return;
 154         wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_REG_SUCCESS MACSTR " %s",
 155                 MAC2STR(mac_addr), uuid);
 156         if (hapd->wps_reg_success_cb)
 157                 hapd->wps_reg_success_cb(hapd->wps_reg_success_cb_ctx,
 158                                          mac_addr, uuid_e);
 159 }
 160
 161
 162 static void hostapd_wps_enrollee_seen_cb(void *ctx, const u8 *addr,
 163                                          const u8 *uuid_e,
 164                                          const u8 *pri_dev_type,
 165                                          u16 config_methods,
 166                                          u16 dev_password_id, u8 request_type,
 167                                          const char *dev_name)
 168 {
 169         struct hostapd_data *hapd = ctx;
 170         char uuid[40];
 171         char devtype[WPS_DEV_TYPE_BUFSIZE];
 172         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 173                 return;
 174         if (dev_name == NULL)
 175                 dev_name = "";
 176         wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, WPS_EVENT_ENROLLEE_SEEN MACSTR
 177                      " %s %s 0x%x %u %u [%s]",
 178                      MAC2STR(addr), uuid,
 179                      wps_dev_type_bin2str(pri_dev_type, devtype,
 180                                           sizeof(devtype)),
 181                      config_methods, dev_password_id, request_type, dev_name);
 182 }
 183
 184
 185 static int str_starts(const char *str, const char *start)
 186 {
 187         return os_strncmp(str, start, os_strlen(start)) == 0;
 188 }
 189
 190
 191 static void wps_reload_config(void *eloop_data, void *user_ctx)
 192 {
 193         struct hostapd_iface *iface = eloop_data;
 194
 195         wpa_printf(MSG_DEBUG, "WPS: Reload configuration data");
 196         if (iface->reload_config(iface) < 0) {
 197                 wpa_printf(MSG_WARNING, "WPS: Failed to reload the updated "
 198                            "configuration");
 199         }
 200 }
 201
 202
 203 static int hostapd_wps_cred_cb(void *ctx, const struct wps_credential *cred)
 204 {
 205         struct hostapd_data *hapd = ctx;
 206         FILE *oconf, *nconf;
 207         size_t len, i;
 208         char *tmp_fname;
 209         char buf[1024];
 210         int multi_bss;
 211         int wpa;
 212
 213         wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
 214                         cred->cred_attr, cred->cred_attr_len);
 215
 216         wpa_printf(MSG_DEBUG, "WPS: Received new AP Settings");
 217         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
 218         wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
 219                    cred->auth_type);
 220         wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
 221         wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
 222         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
 223                         cred->key, cred->key_len);
 224         wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
 225                    MAC2STR(cred->mac_addr));
 226
 227         if ((hapd->conf->wps_cred_processing == 1 ||
 228              hapd->conf->wps_cred_processing == 2) && cred->cred_attr) {
 229                 size_t blen = cred->cred_attr_len * 2 + 1;
 230                 char *_buf = os_malloc(blen);
 231                 if (_buf) {
 232                         wpa_snprintf_hex(_buf, blen,
 233                                          cred->cred_attr, cred->cred_attr_len);
 234                         wpa_msg(hapd->msg_ctx, MSG_INFO, "%s%s",
 235                                 WPS_EVENT_NEW_AP_SETTINGS, _buf);
 236                         os_free(_buf);
 237                 }
 238         } else
 239                 wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_NEW_AP_SETTINGS);
 240
 241         if (hapd->conf->wps_cred_processing == 1)
 242                 return 0;
 243
 244         os_memcpy(hapd->wps->ssid, cred->ssid, cred->ssid_len);
 245         hapd->wps->ssid_len = cred->ssid_len;
 246         hapd->wps->encr_types = cred->encr_type;
 247         hapd->wps->auth_types = cred->auth_type;
 248         if (cred->key_len == 0) {
 249                 os_free(hapd->wps->network_key);
 250                 hapd->wps->network_key = NULL;
 251                 hapd->wps->network_key_len = 0;
 252         } else {
 253                 if (hapd->wps->network_key == NULL ||
 254                     hapd->wps->network_key_len < cred->key_len) {
 255                         hapd->wps->network_key_len = 0;
 256                         os_free(hapd->wps->network_key);
 257                         hapd->wps->network_key = os_malloc(cred->key_len);
 258                         if (hapd->wps->network_key == NULL)
 259                                 return -1;
 260                 }
 261                 hapd->wps->network_key_len = cred->key_len;
 262                 os_memcpy(hapd->wps->network_key, cred->key, cred->key_len);
 263         }
 264         hapd->wps->wps_state = WPS_STATE_CONFIGURED;
 265
 266         len = os_strlen(hapd->iface->config_fname) + 5;
 267         tmp_fname = os_malloc(len);
 268         if (tmp_fname == NULL)
 269                 return -1;
 270         os_snprintf(tmp_fname, len, "%s-new", hapd->iface->config_fname);
 271
 272         oconf = fopen(hapd->iface->config_fname, "r");
 273         if (oconf == NULL) {
 274                 wpa_printf(MSG_WARNING, "WPS: Could not open current "
 275                            "configuration file");
 276                 os_free(tmp_fname);
 277                 return -1;
 278         }
 279
 280         nconf = fopen(tmp_fname, "w");
 281         if (nconf == NULL) {
 282                 wpa_printf(MSG_WARNING, "WPS: Could not write updated "
 283                            "configuration file");
 284                 os_free(tmp_fname);
 285                 fclose(oconf);
 286                 return -1;
 287         }
 288
 289         fprintf(nconf, "# WPS configuration - START\n");
 290
 291         fprintf(nconf, "wps_state=2\n");
 292
 293         fprintf(nconf, "ssid=");
 294         for (i = 0; i < cred->ssid_len; i++)
 295                 fputc(cred->ssid[i], nconf);
 296         fprintf(nconf, "\n");
 297
 298         if ((cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK)) &&
 299             (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK)))
 300                 wpa = 3;
 301         else if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK))
 302                 wpa = 2;
 303         else if (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK))
 304                 wpa = 1;
 305         else
 306                 wpa = 0;
 307
 308         if (wpa) {
 309                 char *prefix;
 310                 fprintf(nconf, "wpa=%d\n", wpa);
 311
 312                 fprintf(nconf, "wpa_key_mgmt=");
 313                 prefix = "";
 314                 if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA)) {
 315                         fprintf(nconf, "WPA-EAP");
 316                         prefix = " ";
 317                 }
 318                 if (cred->auth_type & (WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK))
 319                         fprintf(nconf, "%sWPA-PSK", prefix);
 320                 fprintf(nconf, "\n");
 321
 322                 fprintf(nconf, "wpa_pairwise=");
 323                 prefix = "";
 324                 if (cred->encr_type & WPS_ENCR_AES) {
 325                         fprintf(nconf, "CCMP");
 326                         prefix = " ";
 327                 }
 328                 if (cred->encr_type & WPS_ENCR_TKIP) {
 329                         fprintf(nconf, "%sTKIP", prefix);
 330                 }
 331                 fprintf(nconf, "\n");
 332
 333                 if (cred->key_len >= 8 && cred->key_len < 64) {
 334                         fprintf(nconf, "wpa_passphrase=");
 335                         for (i = 0; i < cred->key_len; i++)
 336                                 fputc(cred->key[i], nconf);
 337                         fprintf(nconf, "\n");
 338                 } else if (cred->key_len == 64) {
 339                         fprintf(nconf, "wpa_psk=");
 340                         for (i = 0; i < cred->key_len; i++)
 341                                 fputc(cred->key[i], nconf);
 342                         fprintf(nconf, "\n");
 343                 } else {
 344                         wpa_printf(MSG_WARNING, "WPS: Invalid key length %lu "
 345                                    "for WPA/WPA2",
 346                                    (unsigned long) cred->key_len);
 347                 }
 348
 349                 fprintf(nconf, "auth_algs=1\n");
 350         } else {
 351                 if ((cred->auth_type & WPS_AUTH_OPEN) &&
 352                     (cred->auth_type & WPS_AUTH_SHARED))
 353                         fprintf(nconf, "auth_algs=3\n");
 354                 else if (cred->auth_type & WPS_AUTH_SHARED)
 355                         fprintf(nconf, "auth_algs=2\n");
 356                 else
 357                         fprintf(nconf, "auth_algs=1\n");
 358
 359                 if (cred->encr_type & WPS_ENCR_WEP && cred->key_idx <= 4) {
 360                         int key_idx = cred->key_idx;
 361                         if (key_idx)
 362                                 key_idx--;
 363                         fprintf(nconf, "wep_default_key=%d\n", key_idx);
 364                         fprintf(nconf, "wep_key%d=", key_idx);
 365                         if (cred->key_len == 10 || cred->key_len == 26) {
 366                                 /* WEP key as a hex string */
 367                                 for (i = 0; i < cred->key_len; i++)
 368                                         fputc(cred->key[i], nconf);
 369                         } else {
 370                                 /* Raw WEP key; convert to hex */
 371                                 for (i = 0; i < cred->key_len; i++)
 372                                         fprintf(nconf, "%02x", cred->key[i]);
 373                         }
 374                         fprintf(nconf, "\n");
 375                 }
 376         }
 377
 378         fprintf(nconf, "# WPS configuration - END\n");
 379
 380         multi_bss = 0;
 381         while (fgets(buf, sizeof(buf), oconf)) {
 382                 if (os_strncmp(buf, "bss=", 4) == 0)
 383                         multi_bss = 1;
 384                 if (!multi_bss &&
 385                     (str_starts(buf, "ssid=") ||
 386                      str_starts(buf, "auth_algs=") ||
 387                      str_starts(buf, "wps_state=") ||
 388                      str_starts(buf, "wpa=") ||
 389                      str_starts(buf, "wpa_psk=") ||
 390                      str_starts(buf, "wpa_pairwise=") ||
 391                      str_starts(buf, "rsn_pairwise=") ||
 392                      str_starts(buf, "wpa_key_mgmt=") ||
 393                      str_starts(buf, "wpa_passphrase="))) {
 394                         fprintf(nconf, "#WPS# %s", buf);
 395                 } else
 396                         fprintf(nconf, "%s", buf);
 397         }
 398
 399         fclose(nconf);
 400         fclose(oconf);
 401
 402         if (rename(tmp_fname, hapd->iface->config_fname) < 0) {
 403                 wpa_printf(MSG_WARNING, "WPS: Failed to rename the updated "
 404                            "configuration file: %s", strerror(errno));
 405                 os_free(tmp_fname);
 406                 return -1;
 407         }
 408
 409         os_free(tmp_fname);
 410
 411         /* Schedule configuration reload after short period of time to allow
 412          * EAP-WSC to be finished.
 413          */
 414         eloop_register_timeout(0, 100000, wps_reload_config, hapd->iface,
 415                                NULL);
 416
 417         /* TODO: dualband AP may need to update multiple configuration files */
 418
 419         wpa_printf(MSG_DEBUG, "WPS: AP configuration updated");
 420
 421         return 0;
 422 }
 423
 424
 425 static void hostapd_wps_reenable_ap_pin(void *eloop_data, void *user_ctx)
 426 {
 427         struct hostapd_data *hapd = eloop_data;
 428
 429         if (hapd->conf->ap_setup_locked)
 430                 return;
 431
 432         wpa_printf(MSG_DEBUG, "WPS: Re-enable AP PIN");
 433         wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_AP_SETUP_UNLOCKED);
 434         hapd->wps->ap_setup_locked = 0;
 435         wps_registrar_update_ie(hapd->wps->registrar);
 436 }
 437
 438
 439 static void hostapd_pwd_auth_fail(struct hostapd_data *hapd,
 440                                   struct wps_event_pwd_auth_fail *data)
 441 {
 442         if (!data->enrollee || hapd->conf->ap_pin == NULL)
 443                 return;
 444
 445         /*
 446          * Registrar failed to prove its knowledge of the AP PIN. Lock AP setup
 447          * for some time if this happens multiple times to slow down brute
 448          * force attacks.
 449          */
 450         hapd->ap_pin_failures++;
 451         wpa_printf(MSG_DEBUG, "WPS: AP PIN authentication failure number %u",
 452                    hapd->ap_pin_failures);
 453         if (hapd->ap_pin_failures < 3)
 454                 return;
 455
 456         wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_AP_SETUP_LOCKED);
 457         hapd->wps->ap_setup_locked = 1;
 458
 459         wps_registrar_update_ie(hapd->wps->registrar);
 460
 461         if (!hapd->conf->ap_setup_locked) {
 462                 if (hapd->ap_pin_lockout_time == 0)
 463                         hapd->ap_pin_lockout_time = 60;
 464                 else if (hapd->ap_pin_lockout_time < 365 * 24 * 60 * 60 &&
 465                          (hapd->ap_pin_failures % 3) == 0)
 466                         hapd->ap_pin_lockout_time *= 2;
 467
 468                 wpa_printf(MSG_DEBUG, "WPS: Disable AP PIN for %u seconds",
 469                            hapd->ap_pin_lockout_time);
 470                 eloop_cancel_timeout(hostapd_wps_reenable_ap_pin, hapd, NULL);
 471                 eloop_register_timeout(hapd->ap_pin_lockout_time, 0,
 472                                        hostapd_wps_reenable_ap_pin, hapd,
 473                                        NULL);
 474         }
 475
 476         /* TODO: dualband AP may need to update other interfaces */
 477 }
 478
 479
 480 static void hostapd_wps_event_cb(void *ctx, enum wps_event event,
 481                                  union wps_event_data *data)
 482 {
 483         struct hostapd_data *hapd = ctx;
 484
 485         if (event == WPS_EV_PWD_AUTH_FAIL)
 486                 hostapd_pwd_auth_fail(hapd, &data->pwd_auth_fail);
 487 }
 488
 489
 490 static void hostapd_wps_clear_ies(struct hostapd_data *hapd)
 491 {
 492         wpabuf_free(hapd->wps_beacon_ie);
 493         hapd->wps_beacon_ie = NULL;
 494
 495         wpabuf_free(hapd->wps_probe_resp_ie);
 496         hapd->wps_probe_resp_ie = NULL;
 497
 498         hapd->drv.set_ap_wps_ie(hapd);
 499 }
 500
 501
 502 static int get_uuid_cb(struct hostapd_iface *iface, void *ctx)
 503 {
 504         const u8 **uuid = ctx;
 505         size_t j;
 506
 507         if (iface == NULL)
 508                 return 0;
 509         for (j = 0; j < iface->num_bss; j++) {
 510                 struct hostapd_data *hapd = iface->bss[j];
 511                 if (hapd->wps && !is_nil_uuid(hapd->wps->uuid)) {
 512                         *uuid = hapd->wps->uuid;
 513                         return 1;
 514                 }
 515         }
 516
 517         return 0;
 518 }
 519
 520
 521 static const u8 * get_own_uuid(struct hostapd_iface *iface)
 522 {
 523         const u8 *uuid;
 524         if (iface->for_each_interface == NULL)
 525                 return NULL;
 526         uuid = NULL;
 527         iface->for_each_interface(iface->interfaces, get_uuid_cb, &uuid);
 528         return uuid;
 529 }
 530
 531
 532 int hostapd_init_wps(struct hostapd_data *hapd,
 533                      struct hostapd_bss_config *conf)
 534 {
 535         struct wps_context *wps;
 536         struct wps_registrar_config cfg;
 537
 538         if (conf->wps_state == 0) {
 539                 hostapd_wps_clear_ies(hapd);
 540                 return 0;
 541         }
 542
 543         wps = os_zalloc(sizeof(*wps));
 544         if (wps == NULL)
 545                 return -1;
 546
 547         wps->cred_cb = hostapd_wps_cred_cb;
 548         wps->event_cb = hostapd_wps_event_cb;
 549         wps->cb_ctx = hapd;
 550
 551         os_memset(&cfg, 0, sizeof(cfg));
 552         wps->wps_state = hapd->conf->wps_state;
 553         wps->ap_setup_locked = hapd->conf->ap_setup_locked;
 554         if (is_nil_uuid(hapd->conf->uuid)) {
 555                 const u8 *uuid;
 556                 uuid = get_own_uuid(hapd->iface);
 557                 if (uuid) {
 558                         os_memcpy(wps->uuid, uuid, UUID_LEN);
 559                         wpa_hexdump(MSG_DEBUG, "WPS: Clone UUID from another "
 560                                     "interface", wps->uuid, UUID_LEN);
 561                 } else {
 562                         uuid_gen_mac_addr(hapd->own_addr, wps->uuid);
 563                         wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
 564                                     "address", wps->uuid, UUID_LEN);
 565                 }
 566         } else {
 567                 os_memcpy(wps->uuid, hapd->conf->uuid, UUID_LEN);
 568                 wpa_hexdump(MSG_DEBUG, "WPS: Use configured UUID",
 569                             wps->uuid, UUID_LEN);
 570         }
 571         wps->ssid_len = hapd->conf->ssid.ssid_len;
 572         os_memcpy(wps->ssid, hapd->conf->ssid.ssid, wps->ssid_len);
 573         wps->ap = 1;
 574         os_memcpy(wps->dev.mac_addr, hapd->own_addr, ETH_ALEN);
 575         wps->dev.device_name = hapd->conf->device_name ?
 576                 os_strdup(hapd->conf->device_name) : NULL;
 577         wps->dev.manufacturer = hapd->conf->manufacturer ?
 578                 os_strdup(hapd->conf->manufacturer) : NULL;
 579         wps->dev.model_name = hapd->conf->model_name ?
 580                 os_strdup(hapd->conf->model_name) : NULL;
 581         wps->dev.model_number = hapd->conf->model_number ?
 582                 os_strdup(hapd->conf->model_number) : NULL;
 583         wps->dev.serial_number = hapd->conf->serial_number ?
 584                 os_strdup(hapd->conf->serial_number) : NULL;
 585         wps->config_methods =
 586                 wps_config_methods_str2bin(hapd->conf->config_methods);
 587         if (hapd->conf->device_type &&
 588             wps_dev_type_str2bin(hapd->conf->device_type,
 589                                  wps->dev.pri_dev_type) < 0) {
 590                 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 591                 os_free(wps);
 592                 return -1;
 593         }
 594         wps->dev.os_version = WPA_GET_BE32(hapd->conf->os_version);
 595         wps->dev.rf_bands = hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211A ?
 596                 WPS_RF_50GHZ : WPS_RF_24GHZ; /* FIX: dualband AP */
 597
 598         if (conf->wpa & WPA_PROTO_RSN) {
 599                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK)
 600                         wps->auth_types |= WPS_AUTH_WPA2PSK;
 601                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X)
 602                         wps->auth_types |= WPS_AUTH_WPA2;
 603
 604                 if (conf->rsn_pairwise & WPA_CIPHER_CCMP)
 605                         wps->encr_types |= WPS_ENCR_AES;
 606                 if (conf->rsn_pairwise & WPA_CIPHER_TKIP)
 607                         wps->encr_types |= WPS_ENCR_TKIP;
 608         }
 609
 610         if (conf->wpa & WPA_PROTO_WPA) {
 611                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK)
 612                         wps->auth_types |= WPS_AUTH_WPAPSK;
 613                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X)
 614                         wps->auth_types |= WPS_AUTH_WPA;
 615
 616                 if (conf->wpa_pairwise & WPA_CIPHER_CCMP)
 617                         wps->encr_types |= WPS_ENCR_AES;
 618                 if (conf->wpa_pairwise & WPA_CIPHER_TKIP)
 619                         wps->encr_types |= WPS_ENCR_TKIP;
 620         }
 621
 622         if (conf->ssid.security_policy == SECURITY_PLAINTEXT) {
 623                 wps->encr_types |= WPS_ENCR_NONE;
 624                 wps->auth_types |= WPS_AUTH_OPEN;
 625         } else if (conf->ssid.security_policy == SECURITY_STATIC_WEP) {
 626                 wps->encr_types |= WPS_ENCR_WEP;
 627                 if (conf->auth_algs & WPA_AUTH_ALG_OPEN)
 628                         wps->auth_types |= WPS_AUTH_OPEN;
 629                 if (conf->auth_algs & WPA_AUTH_ALG_SHARED)
 630                         wps->auth_types |= WPS_AUTH_SHARED;
 631         } else if (conf->ssid.security_policy == SECURITY_IEEE_802_1X) {
 632                 wps->auth_types |= WPS_AUTH_OPEN;
 633                 if (conf->default_wep_key_len)
 634                         wps->encr_types |= WPS_ENCR_WEP;
 635                 else
 636                         wps->encr_types |= WPS_ENCR_NONE;
 637         }
 638
 639         if (conf->ssid.wpa_psk_file) {
 640                 /* Use per-device PSKs */
 641         } else if (conf->ssid.wpa_passphrase) {
 642                 wps->network_key = (u8 *) os_strdup(conf->ssid.wpa_passphrase);
 643                 wps->network_key_len = os_strlen(conf->ssid.wpa_passphrase);
 644         } else if (conf->ssid.wpa_psk) {
 645                 wps->network_key = os_malloc(2 * PMK_LEN + 1);
 646                 if (wps->network_key == NULL) {
 647                         os_free(wps);
 648                         return -1;
 649                 }
 650                 wpa_snprintf_hex((char *) wps->network_key, 2 * PMK_LEN + 1,
 651                                  conf->ssid.wpa_psk->psk, PMK_LEN);
 652                 wps->network_key_len = 2 * PMK_LEN;
 653         } else if (conf->ssid.wep.keys_set && conf->ssid.wep.key[0]) {
 654                 wps->network_key = os_malloc(conf->ssid.wep.len[0]);
 655                 if (wps->network_key == NULL) {
 656                         os_free(wps);
 657                         return -1;
 658                 }
 659                 os_memcpy(wps->network_key, conf->ssid.wep.key[0],
 660                           conf->ssid.wep.len[0]);
 661                 wps->network_key_len = conf->ssid.wep.len[0];
 662         }
 663
 664         if (conf->ssid.wpa_psk) {
 665                 os_memcpy(wps->psk, conf->ssid.wpa_psk->psk, PMK_LEN);
 666                 wps->psk_set = 1;
 667         }
 668
 669         if (conf->wps_state == WPS_STATE_NOT_CONFIGURED) {
 670                 /* Override parameters to enable security by default */
 671                 wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 672                 wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 673         }
 674
 675         wps->ap_settings = conf->ap_settings;
 676         wps->ap_settings_len = conf->ap_settings_len;
 677
 678         cfg.new_psk_cb = hostapd_wps_new_psk_cb;
 679         cfg.set_ie_cb = hostapd_wps_set_ie_cb;
 680         cfg.pin_needed_cb = hostapd_wps_pin_needed_cb;
 681         cfg.reg_success_cb = hostapd_wps_reg_success_cb;
 682         cfg.enrollee_seen_cb = hostapd_wps_enrollee_seen_cb;
 683         cfg.cb_ctx = hapd;
 684         cfg.skip_cred_build = conf->skip_cred_build;
 685         cfg.extra_cred = conf->extra_cred;
 686         cfg.extra_cred_len = conf->extra_cred_len;
 687         cfg.disable_auto_conf = (hapd->conf->wps_cred_processing == 1) &&
 688                 conf->skip_cred_build;
 689         if (conf->ssid.security_policy == SECURITY_STATIC_WEP)
 690                 cfg.static_wep_only = 1;
 691
 692         wps->registrar = wps_registrar_init(wps, &cfg);
 693         if (wps->registrar == NULL) {
 694                 printf("Failed to initialize WPS Registrar\n");
 695                 os_free(wps->network_key);
 696                 os_free(wps);
 697                 return -1;
 698         }
 699
 700 #ifdef CONFIG_WPS_UPNP
 701         wps->friendly_name = hapd->conf->friendly_name;
 702         wps->manufacturer_url = hapd->conf->manufacturer_url;
 703         wps->model_description = hapd->conf->model_description;
 704         wps->model_url = hapd->conf->model_url;
 705         wps->upc = hapd->conf->upc;
 706
 707         if (hostapd_wps_upnp_init(hapd, wps) < 0) {
 708                 wpa_printf(MSG_ERROR, "Failed to initialize WPS UPnP");
 709                 wps_registrar_deinit(wps->registrar);
 710                 os_free(wps->network_key);
 711                 os_free(wps);
 712                 return -1;
 713         }
 714 #endif /* CONFIG_WPS_UPNP */
 715
 716         hostapd_register_probereq_cb(hapd, hostapd_wps_probe_req_rx, hapd);
 717
 718         hapd->wps = wps;
 719
 720         return 0;
 721 }
 722
 723
 724 void hostapd_deinit_wps(struct hostapd_data *hapd)
 725 {
 726         eloop_cancel_timeout(hostapd_wps_reenable_ap_pin, hapd, NULL);
 727         eloop_cancel_timeout(hostapd_wps_ap_pin_timeout, hapd, NULL);
 728         if (hapd->wps == NULL)
 729                 return;
 730 #ifdef CONFIG_WPS_UPNP
 731         hostapd_wps_upnp_deinit(hapd);
 732 #endif /* CONFIG_WPS_UPNP */
 733         wps_registrar_deinit(hapd->wps->registrar);
 734         os_free(hapd->wps->network_key);
 735         wps_device_data_free(&hapd->wps->dev);
 736         wpabuf_free(hapd->wps->dh_pubkey);
 737         wpabuf_free(hapd->wps->dh_privkey);
 738         wpabuf_free(hapd->wps->oob_conf.pubkey_hash);
 739         wpabuf_free(hapd->wps->oob_conf.dev_password);
 740         wps_free_pending_msgs(hapd->wps->upnp_msgs);
 741         os_free(hapd->wps);
 742         hapd->wps = NULL;
 743         hostapd_wps_clear_ies(hapd);
 744 }
 745
 746
 747 void hostapd_update_wps(struct hostapd_data *hapd)
 748 {
 749         if (hapd->wps == NULL)
 750                 return;
 751         if (hapd->conf->wps_state)
 752                 wps_registrar_update_ie(hapd->wps->registrar);
 753         else
 754                 hostapd_deinit_wps(hapd);
 755 }
 756
 757
 758 int hostapd_wps_add_pin(struct hostapd_data *hapd, const u8 *addr,
 759                         const char *uuid, const char *pin, int timeout)
 760 {
 761         u8 u[UUID_LEN];
 762         int any = 0;
 763
 764         if (hapd->wps == NULL)
 765                 return -1;
 766         if (os_strcmp(uuid, "any") == 0)
 767                 any = 1;
 768         else if (uuid_str2bin(uuid, u))
 769                 return -1;
 770         return wps_registrar_add_pin(hapd->wps->registrar, addr,
 771                                      any ? NULL : u,
 772                                      (const u8 *) pin, os_strlen(pin),
 773                                      timeout);
 774 }
 775
 776
 777 int hostapd_wps_button_pushed(struct hostapd_data *hapd)
 778 {
 779         if (hapd->wps == NULL)
 780                 return -1;
 781         return wps_registrar_button_pushed(hapd->wps->registrar);
 782 }
 783
 784
 785 #ifdef CONFIG_WPS_OOB
 786 int hostapd_wps_start_oob(struct hostapd_data *hapd, char *device_type,
 787                           char *path, char *method, char *name)
 788 {
 789         struct wps_context *wps = hapd->wps;
 790         struct oob_device_data *oob_dev;
 791
 792         oob_dev = wps_get_oob_device(device_type);
 793         if (oob_dev == NULL)
 794                 return -1;
 795         oob_dev->device_path = path;
 796         oob_dev->device_name = name;
 797         wps->oob_conf.oob_method = wps_get_oob_method(method);
 798
 799         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) {
 800                 /*
 801                  * Use pre-configured DH keys in order to be able to write the
 802                  * key hash into the OOB file.
 803                  */
 804                 wpabuf_free(wps->dh_pubkey);
 805                 wpabuf_free(wps->dh_privkey);
 806                 wps->dh_privkey = NULL;
 807                 wps->dh_pubkey = dh_init(dh_groups_get(WPS_DH_GROUP),
 808                                          &wps->dh_privkey);
 809                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 810                 if (wps->dh_pubkey == NULL) {
 811                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 812                                    "Diffie-Hellman handshake");
 813                         return -1;
 814                 }
 815         }
 816
 817         if (wps_process_oob(wps, oob_dev, 1) < 0)
 818                 goto error;
 819
 820         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 821              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 822             hostapd_wps_add_pin(hapd, NULL, "any",
 823                                 wpabuf_head(wps->oob_conf.dev_password), 0) <
 824             0)
 825                 goto error;
 826
 827         return 0;
 828
 829 error:
 830         wpabuf_free(wps->dh_pubkey);
 831         wps->dh_pubkey = NULL;
 832         wpabuf_free(wps->dh_privkey);
 833         wps->dh_privkey = NULL;
 834         return -1;
 835 }
 836 #endif /* CONFIG_WPS_OOB */
 837
 838
 839 static int hostapd_wps_probe_req_rx(void *ctx, const u8 *addr,
 840                                     const u8 *ie, size_t ie_len)
 841 {
 842         struct hostapd_data *hapd = ctx;
 843         struct wpabuf *wps_ie;
 844         struct ieee802_11_elems elems;
 845
 846         if (hapd->wps == NULL)
 847                 return 0;
 848
 849         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 850                 wpa_printf(MSG_DEBUG, "WPS: Could not parse ProbeReq from "
 851                            MACSTR, MAC2STR(addr));
 852                 return 0;
 853         }
 854
 855         if (elems.ssid && elems.ssid_len > 0 &&
 856             (elems.ssid_len != hapd->conf->ssid.ssid_len ||
 857              os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) !=
 858              0))
 859                 return 0; /* Not for us */
 860
 861         wps_ie = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 862         if (wps_ie == NULL)
 863                 return 0;
 864         if (wps_validate_probe_req(wps_ie) < 0) {
 865                 wpabuf_free(wps_ie);
 866                 return 0;
 867         }
 868
 869         if (wpabuf_len(wps_ie) > 0) {
 870                 int p2p_wildcard = 0;
 871 #ifdef CONFIG_P2P
 872                 if (elems.ssid && elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 873                     os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 874                               P2P_WILDCARD_SSID_LEN) == 0)
 875                         p2p_wildcard = 1;
 876 #endif /* CONFIG_P2P */
 877                 wps_registrar_probe_req_rx(hapd->wps->registrar, addr, wps_ie,
 878                                            p2p_wildcard);
 879 #ifdef CONFIG_WPS_UPNP
 880                 /* FIX: what exactly should be included in the WLANEvent?
 881                  * WPS attributes? Full ProbeReq frame? */
 882                 if (!p2p_wildcard)
 883                         upnp_wps_device_send_wlan_event(
 884                                 hapd->wps_upnp, addr,
 885                                 UPNP_WPS_WLANEVENT_TYPE_PROBE, wps_ie);
 886 #endif /* CONFIG_WPS_UPNP */
 887         }
 888
 889         wpabuf_free(wps_ie);
 890
 891         return 0;
 892 }
 893
 894
 895 #ifdef CONFIG_WPS_UPNP
 896
 897 static int hostapd_rx_req_put_wlan_response(
 898         void *priv, enum upnp_wps_wlanevent_type ev_type,
 899         const u8 *mac_addr, const struct wpabuf *msg,
 900         enum wps_msg_type msg_type)
 901 {
 902         struct hostapd_data *hapd = priv;
 903         struct sta_info *sta;
 904         struct upnp_pending_message *p;
 905
 906         wpa_printf(MSG_DEBUG, "WPS UPnP: PutWLANResponse ev_type=%d mac_addr="
 907                    MACSTR, ev_type, MAC2STR(mac_addr));
 908         wpa_hexdump(MSG_MSGDUMP, "WPS UPnP: PutWLANResponse NewMessage",
 909                     wpabuf_head(msg), wpabuf_len(msg));
 910         if (ev_type != UPNP_WPS_WLANEVENT_TYPE_EAP) {
 911                 wpa_printf(MSG_DEBUG, "WPS UPnP: Ignored unexpected "
 912                            "PutWLANResponse WLANEventType %d", ev_type);
 913                 return -1;
 914         }
 915
 916         /*
 917          * EAP response to ongoing to WPS Registration. Send it to EAP-WSC
 918          * server implementation for delivery to the peer.
 919          */
 920
 921         sta = ap_get_sta(hapd, mac_addr);
 922 #ifndef CONFIG_WPS_STRICT
 923         if (!sta) {
 924                 /*
 925                  * Workaround - Intel wsccmd uses bogus NewWLANEventMAC:
 926                  * Pick STA that is in an ongoing WPS registration without
 927                  * checking the MAC address.
 928                  */
 929                 wpa_printf(MSG_DEBUG, "WPS UPnP: No matching STA found based "
 930                            "on NewWLANEventMAC; try wildcard match");
 931                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 932                         if (sta->eapol_sm && (sta->flags & WLAN_STA_WPS))
 933                                 break;
 934                 }
 935         }
 936 #endif /* CONFIG_WPS_STRICT */
 937
 938         if (!sta) {
 939                 wpa_printf(MSG_DEBUG, "WPS UPnP: No matching STA found");
 940                 return 0;
 941         }
 942
 943         p = os_zalloc(sizeof(*p));
 944         if (p == NULL)
 945                 return -1;
 946         os_memcpy(p->addr, sta->addr, ETH_ALEN);
 947         p->msg = wpabuf_dup(msg);
 948         p->type = msg_type;
 949         p->next = hapd->wps->upnp_msgs;
 950         hapd->wps->upnp_msgs = p;
 951
 952         return eapol_auth_eap_pending_cb(sta->eapol_sm, sta->eapol_sm->eap);
 953 }
 954
 955
 956 static int hostapd_wps_upnp_init(struct hostapd_data *hapd,
 957                                  struct wps_context *wps)
 958 {
 959         struct upnp_wps_device_ctx *ctx;
 960
 961         if (!hapd->conf->upnp_iface)
 962                 return 0;
 963         ctx = os_zalloc(sizeof(*ctx));
 964         if (ctx == NULL)
 965                 return -1;
 966
 967         ctx->rx_req_put_wlan_response = hostapd_rx_req_put_wlan_response;
 968         if (hapd->conf->ap_pin)
 969                 ctx->ap_pin = os_strdup(hapd->conf->ap_pin);
 970
 971         hapd->wps_upnp = upnp_wps_device_init(ctx, wps, hapd);
 972         if (hapd->wps_upnp == NULL) {
 973                 os_free(ctx);
 974                 return -1;
 975         }
 976         wps->wps_upnp = hapd->wps_upnp;
 977
 978         if (upnp_wps_device_start(hapd->wps_upnp, hapd->conf->upnp_iface)) {
 979                 upnp_wps_device_deinit(hapd->wps_upnp);
 980                 hapd->wps_upnp = NULL;
 981                 return -1;
 982         }
 983
 984         return 0;
 985 }
 986
 987
 988 static void hostapd_wps_upnp_deinit(struct hostapd_data *hapd)
 989 {
 990         upnp_wps_device_deinit(hapd->wps_upnp);
 991 }
 992
 993 #endif /* CONFIG_WPS_UPNP */
 994
 995
 996 int hostapd_wps_get_mib_sta(struct hostapd_data *hapd, const u8 *addr,
 997                             char *buf, size_t buflen)
 998 {
 999         if (hapd->wps == NULL)
1000                 return 0;
1001         return wps_registrar_get_info(hapd->wps->registrar, addr, buf, buflen);
1002 }
1003
1004
1005 static void hostapd_wps_ap_pin_timeout(void *eloop_data, void *user_ctx)
1006 {
1007         struct hostapd_data *hapd = eloop_data;
1008         wpa_printf(MSG_DEBUG, "WPS: AP PIN timed out");
1009         hostapd_wps_ap_pin_disable(hapd);
1010 }
1011
1012
1013 static void hostapd_wps_ap_pin_enable(struct hostapd_data *hapd, int timeout)
1014 {
1015         wpa_printf(MSG_DEBUG, "WPS: Enabling AP PIN (timeout=%d)", timeout);
1016         hapd->ap_pin_failures = 0;
1017         hapd->conf->ap_setup_locked = 0;
1018         if (hapd->wps->ap_setup_locked) {
1019                 wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_AP_SETUP_UNLOCKED);
1020                 hapd->wps->ap_setup_locked = 0;
1021                 wps_registrar_update_ie(hapd->wps->registrar);
1022         }
1023         eloop_cancel_timeout(hostapd_wps_ap_pin_timeout, hapd, NULL);
1024         if (timeout > 0)
1025                 eloop_register_timeout(timeout, 0,
1026                                        hostapd_wps_ap_pin_timeout, hapd, NULL);
1027 }
1028
1029
1030 void hostapd_wps_ap_pin_disable(struct hostapd_data *hapd)
1031 {
1032         wpa_printf(MSG_DEBUG, "WPS: Disabling AP PIN");
1033         os_free(hapd->conf->ap_pin);
1034         hapd->conf->ap_pin = NULL;
1035 #ifdef CONFIG_WPS_UPNP
1036         upnp_wps_set_ap_pin(hapd->wps_upnp, NULL);
1037 #endif /* CONFIG_WPS_UPNP */
1038         eloop_cancel_timeout(hostapd_wps_ap_pin_timeout, hapd, NULL);
1039 }
1040
1041
1042 const char * hostapd_wps_ap_pin_random(struct hostapd_data *hapd, int timeout)
1043 {
1044         unsigned int pin;
1045         char pin_txt[9];
1046
1047         pin = wps_generate_pin();
1048         os_snprintf(pin_txt, sizeof(pin_txt), "%u", pin);
1049         os_free(hapd->conf->ap_pin);
1050         hapd->conf->ap_pin = os_strdup(pin_txt);
1051 #ifdef CONFIG_WPS_UPNP
1052         upnp_wps_set_ap_pin(hapd->wps_upnp, pin_txt);
1053 #endif /* CONFIG_WPS_UPNP */
1054         hostapd_wps_ap_pin_enable(hapd, timeout);
1055         return hapd->conf->ap_pin;
1056 }
1057
1058
1059 const char * hostapd_wps_ap_pin_get(struct hostapd_data *hapd)
1060 {
1061         return hapd->conf->ap_pin;
1062 }
1063
1064
1065 int hostapd_wps_ap_pin_set(struct hostapd_data *hapd, const char *pin,
1066                            int timeout)
1067 {
1068         os_free(hapd->conf->ap_pin);
1069         hapd->conf->ap_pin = os_strdup(pin);
1070         if (hapd->conf->ap_pin == NULL)
1071                 return -1;
1072 #ifdef CONFIG_WPS_UPNP
1073         upnp_wps_set_ap_pin(hapd->wps_upnp, hapd->conf->ap_pin);
1074 #endif /* CONFIG_WPS_UPNP */
1075         hostapd_wps_ap_pin_enable(hapd, timeout);
1076         return 0;
1077 }