wpa_supplicant/wps_supplicant.c

   1 /*
   2  * wpa_supplicant / 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 "includes.h"
  16
  17 #include "common.h"
  18 #include "eloop.h"
  19 #include "uuid.h"
  20 #include "crypto/dh_group5.h"
  21 #include "common/ieee802_11_defs.h"
  22 #include "common/ieee802_11_common.h"
  23 #include "common/wpa_common.h"
  24 #include "common/wpa_ctrl.h"
  25 #include "eap_common/eap_wsc_common.h"
  26 #include "eap_peer/eap.h"
  27 #include "rsn_supp/wpa.h"
  28 #include "config.h"
  29 #include "wpa_supplicant_i.h"
  30 #include "driver_i.h"
  31 #include "notify.h"
  32 #include "blacklist.h"
  33 #include "bss.h"
  34 #include "scan.h"
  35 #include "p2p_supplicant.h"
  36 #include "wps_supplicant.h"
  37
  38
  39 #ifndef WPS_PIN_SCAN_IGNORE_SEL_REG
  40 #define WPS_PIN_SCAN_IGNORE_SEL_REG 3
  41 #endif /* WPS_PIN_SCAN_IGNORE_SEL_REG */
  42
  43 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
  44 static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
  45
  46
  47 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
  48 {
  49         if (!wpa_s->wps_success &&
  50             wpa_s->current_ssid &&
  51             eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
  52                 const u8 *bssid = wpa_s->bssid;
  53                 if (is_zero_ether_addr(bssid))
  54                         bssid = wpa_s->pending_bssid;
  55
  56                 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
  57                            " did not succeed - continue trying to find "
  58                            "suitable AP", MAC2STR(bssid));
  59                 wpa_blacklist_add(wpa_s, bssid);
  60
  61                 wpa_supplicant_deauthenticate(wpa_s,
  62                                               WLAN_REASON_DEAUTH_LEAVING);
  63                 wpa_s->reassociate = 1;
  64                 wpa_supplicant_req_scan(wpa_s,
  65                                         wpa_s->blacklist_cleared ? 5 : 0, 0);
  66                 wpa_s->blacklist_cleared = 0;
  67                 return 1;
  68         }
  69
  70         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
  71
  72         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
  73             !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
  74                 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
  75                            "try to associate with the received credential");
  76                 wpa_supplicant_deauthenticate(wpa_s,
  77                                               WLAN_REASON_DEAUTH_LEAVING);
  78                 wpa_s->after_wps = 5;
  79                 wpa_s->wps_freq = wpa_s->assoc_freq;
  80                 wpa_s->reassociate = 1;
  81                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  82                 return 1;
  83         }
  84
  85         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
  86                 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
  87                            "for external credential processing");
  88                 wpas_clear_wps(wpa_s);
  89                 wpa_supplicant_deauthenticate(wpa_s,
  90                                               WLAN_REASON_DEAUTH_LEAVING);
  91                 return 1;
  92         }
  93
  94         return 0;
  95 }
  96
  97
  98 static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
  99                                          struct wpa_ssid *ssid,
 100                                          const struct wps_credential *cred)
 101 {
 102         struct wpa_driver_capa capa;
 103         struct wpa_bss *bss;
 104         const u8 *ie;
 105         struct wpa_ie_data adv;
 106         int wpa2 = 0, ccmp = 0;
 107
 108         /*
 109          * Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
 110          * case they are configured for mixed mode operation (WPA+WPA2 and
 111          * TKIP+CCMP). Try to use scan results to figure out whether the AP
 112          * actually supports stronger security and select that if the client
 113          * has support for it, too.
 114          */
 115
 116         if (wpa_drv_get_capa(wpa_s, &capa))
 117                 return; /* Unknown what driver supports */
 118
 119         bss = wpa_bss_get(wpa_s, cred->mac_addr, ssid->ssid, ssid->ssid_len);
 120         if (bss == NULL) {
 121                 wpa_printf(MSG_DEBUG, "WPS: The AP was not found from BSS "
 122                            "table - use credential as-is");
 123                 return;
 124         }
 125
 126         wpa_printf(MSG_DEBUG, "WPS: AP found from BSS table");
 127
 128         ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 129         if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
 130                 wpa2 = 1;
 131                 if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
 132                         ccmp = 1;
 133         } else {
 134                 ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 135                 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
 136                     adv.pairwise_cipher & WPA_CIPHER_CCMP)
 137                         ccmp = 1;
 138         }
 139
 140         if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
 141             (ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
 142                 /*
 143                  * TODO: This could be the initial AP configuration and the
 144                  * Beacon contents could change shortly. Should request a new
 145                  * scan and delay addition of the network until the updated
 146                  * scan results are available.
 147                  */
 148                 wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
 149                            "support - use credential as-is");
 150                 return;
 151         }
 152
 153         if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 154             (ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
 155             (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
 156                 wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
 157                            "based on scan results");
 158                 if (wpa_s->conf->ap_scan == 1)
 159                         ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
 160                 else
 161                         ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 162         }
 163
 164         if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
 165             (ssid->proto & WPA_PROTO_WPA) &&
 166             (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
 167                 wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
 168                            "based on scan results");
 169                 if (wpa_s->conf->ap_scan == 1)
 170                         ssid->proto |= WPA_PROTO_RSN;
 171                 else
 172                         ssid->proto = WPA_PROTO_RSN;
 173         }
 174 }
 175
 176
 177 static int wpa_supplicant_wps_cred(void *ctx,
 178                                    const struct wps_credential *cred)
 179 {
 180         struct wpa_supplicant *wpa_s = ctx;
 181         struct wpa_ssid *ssid = wpa_s->current_ssid;
 182         u8 key_idx = 0;
 183         u16 auth_type;
 184
 185         if ((wpa_s->conf->wps_cred_processing == 1 ||
 186              wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) {
 187                 size_t blen = cred->cred_attr_len * 2 + 1;
 188                 char *buf = os_malloc(blen);
 189                 if (buf) {
 190                         wpa_snprintf_hex(buf, blen,
 191                                          cred->cred_attr, cred->cred_attr_len);
 192                         wpa_msg(wpa_s, MSG_INFO, "%s%s",
 193                                 WPS_EVENT_CRED_RECEIVED, buf);
 194                         os_free(buf);
 195                 }
 196
 197                 wpas_notify_wps_credential(wpa_s, cred);
 198         } else
 199                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
 200
 201         wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
 202                         cred->cred_attr, cred->cred_attr_len);
 203
 204         if (wpa_s->conf->wps_cred_processing == 1)
 205                 return 0;
 206
 207         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
 208         wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
 209                    cred->auth_type);
 210         wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
 211         wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
 212         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
 213                         cred->key, cred->key_len);
 214         wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
 215                    MAC2STR(cred->mac_addr));
 216
 217         auth_type = cred->auth_type;
 218         if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 219                 wpa_printf(MSG_DEBUG, "WPS: Workaround - convert mixed-mode "
 220                            "auth_type into WPA2PSK");
 221                 auth_type = WPS_AUTH_WPA2PSK;
 222         }
 223
 224         if (auth_type != WPS_AUTH_OPEN &&
 225             auth_type != WPS_AUTH_SHARED &&
 226             auth_type != WPS_AUTH_WPAPSK &&
 227             auth_type != WPS_AUTH_WPA2PSK) {
 228                 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
 229                            "unsupported authentication type 0x%x",
 230                            auth_type);
 231                 return 0;
 232         }
 233
 234         if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 235                 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
 236                            "on the received credential");
 237                 os_free(ssid->eap.identity);
 238                 ssid->eap.identity = NULL;
 239                 ssid->eap.identity_len = 0;
 240                 os_free(ssid->eap.phase1);
 241                 ssid->eap.phase1 = NULL;
 242                 os_free(ssid->eap.eap_methods);
 243                 ssid->eap.eap_methods = NULL;
 244                 if (!ssid->p2p_group)
 245                         ssid->temporary = 0;
 246         } else {
 247                 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
 248                            "received credential");
 249                 ssid = wpa_config_add_network(wpa_s->conf);
 250                 if (ssid == NULL)
 251                         return -1;
 252                 wpas_notify_network_added(wpa_s, ssid);
 253         }
 254
 255         wpa_config_set_network_defaults(ssid);
 256
 257         os_free(ssid->ssid);
 258         ssid->ssid = os_malloc(cred->ssid_len);
 259         if (ssid->ssid) {
 260                 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
 261                 ssid->ssid_len = cred->ssid_len;
 262         }
 263
 264         switch (cred->encr_type) {
 265         case WPS_ENCR_NONE:
 266                 break;
 267         case WPS_ENCR_WEP:
 268                 if (cred->key_len <= 0)
 269                         break;
 270                 if (cred->key_len != 5 && cred->key_len != 13 &&
 271                     cred->key_len != 10 && cred->key_len != 26) {
 272                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
 273                                    "%lu", (unsigned long) cred->key_len);
 274                         return -1;
 275                 }
 276                 if (cred->key_idx > NUM_WEP_KEYS) {
 277                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
 278                                    cred->key_idx);
 279                         return -1;
 280                 }
 281                 if (cred->key_idx)
 282                         key_idx = cred->key_idx - 1;
 283                 if (cred->key_len == 10 || cred->key_len == 26) {
 284                         if (hexstr2bin((char *) cred->key,
 285                                        ssid->wep_key[key_idx],
 286                                        cred->key_len / 2) < 0) {
 287                                 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
 288                                            "%d", key_idx);
 289                                 return -1;
 290                         }
 291                         ssid->wep_key_len[key_idx] = cred->key_len / 2;
 292                 } else {
 293                         os_memcpy(ssid->wep_key[key_idx], cred->key,
 294                                   cred->key_len);
 295                         ssid->wep_key_len[key_idx] = cred->key_len;
 296                 }
 297                 ssid->wep_tx_keyidx = key_idx;
 298                 break;
 299         case WPS_ENCR_TKIP:
 300                 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
 301                 break;
 302         case WPS_ENCR_AES:
 303                 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 304                 break;
 305         }
 306
 307         switch (auth_type) {
 308         case WPS_AUTH_OPEN:
 309                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 310                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 311                 ssid->proto = 0;
 312                 break;
 313         case WPS_AUTH_SHARED:
 314                 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 315                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 316                 ssid->proto = 0;
 317                 break;
 318         case WPS_AUTH_WPAPSK:
 319                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 320                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 321                 ssid->proto = WPA_PROTO_WPA;
 322                 break;
 323         case WPS_AUTH_WPA:
 324                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 325                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 326                 ssid->proto = WPA_PROTO_WPA;
 327                 break;
 328         case WPS_AUTH_WPA2:
 329                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 330                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 331                 ssid->proto = WPA_PROTO_RSN;
 332                 break;
 333         case WPS_AUTH_WPA2PSK:
 334                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 335                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 336                 ssid->proto = WPA_PROTO_RSN;
 337                 break;
 338         }
 339
 340         if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
 341                 if (cred->key_len == 2 * PMK_LEN) {
 342                         if (hexstr2bin((const char *) cred->key, ssid->psk,
 343                                        PMK_LEN)) {
 344                                 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
 345                                            "Key");
 346                                 return -1;
 347                         }
 348                         ssid->psk_set = 1;
 349                 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
 350                         os_free(ssid->passphrase);
 351                         ssid->passphrase = os_malloc(cred->key_len + 1);
 352                         if (ssid->passphrase == NULL)
 353                                 return -1;
 354                         os_memcpy(ssid->passphrase, cred->key, cred->key_len);
 355                         ssid->passphrase[cred->key_len] = '\0';
 356                         wpa_config_update_psk(ssid);
 357                 } else {
 358                         wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
 359                                    "length %lu",
 360                                    (unsigned long) cred->key_len);
 361                         return -1;
 362                 }
 363         }
 364
 365         wpas_wps_security_workaround(wpa_s, ssid, cred);
 366
 367 #ifndef CONFIG_NO_CONFIG_WRITE
 368         if (wpa_s->conf->update_config &&
 369             wpa_config_write(wpa_s->confname, wpa_s->conf)) {
 370                 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
 371                 return -1;
 372         }
 373 #endif /* CONFIG_NO_CONFIG_WRITE */
 374
 375         return 0;
 376 }
 377
 378
 379 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
 380                                          struct wps_event_m2d *m2d)
 381 {
 382         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
 383                 "dev_password_id=%d config_error=%d",
 384                 m2d->dev_password_id, m2d->config_error);
 385         wpas_notify_wps_event_m2d(wpa_s, m2d);
 386 }
 387
 388
 389 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
 390                                           struct wps_event_fail *fail)
 391 {
 392         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
 393         wpas_clear_wps(wpa_s);
 394         wpas_notify_wps_event_fail(wpa_s, fail);
 395 }
 396
 397
 398 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
 399 {
 400         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
 401         wpa_s->wps_success = 1;
 402         wpas_notify_wps_event_success(wpa_s);
 403 #ifdef CONFIG_P2P
 404         wpas_p2p_wps_success(wpa_s, wpa_s->bssid, 0);
 405 #endif /* CONFIG_P2P */
 406 }
 407
 408
 409 static void wpa_supplicant_wps_event_er_ap_add(struct wpa_supplicant *wpa_s,
 410                                                struct wps_event_er_ap *ap)
 411 {
 412         char uuid_str[100];
 413         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 414
 415         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 416         if (ap->pri_dev_type)
 417                 wps_dev_type_bin2str(ap->pri_dev_type, dev_type,
 418                                      sizeof(dev_type));
 419         else
 420                 dev_type[0] = '\0';
 421
 422         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s " MACSTR
 423                 " pri_dev_type=%s wps_state=%d |%s|%s|%s|%s|%s|%s|",
 424                 uuid_str, MAC2STR(ap->mac_addr), dev_type, ap->wps_state,
 425                 ap->friendly_name ? ap->friendly_name : "",
 426                 ap->manufacturer ? ap->manufacturer : "",
 427                 ap->model_description ? ap->model_description : "",
 428                 ap->model_name ? ap->model_name : "",
 429                 ap->manufacturer_url ? ap->manufacturer_url : "",
 430                 ap->model_url ? ap->model_url : "");
 431 }
 432
 433
 434 static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
 435                                                   struct wps_event_er_ap *ap)
 436 {
 437         char uuid_str[100];
 438         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 439         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
 440 }
 441
 442
 443 static void wpa_supplicant_wps_event_er_enrollee_add(
 444         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 445 {
 446         char uuid_str[100];
 447         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 448
 449         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 450         if (enrollee->pri_dev_type)
 451                 wps_dev_type_bin2str(enrollee->pri_dev_type, dev_type,
 452                                      sizeof(dev_type));
 453         else
 454                 dev_type[0] = '\0';
 455
 456         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
 457                 " M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
 458                 "|%s|%s|%s|%s|%s|",
 459                 uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
 460                 enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
 461                 enrollee->dev_name ? enrollee->dev_name : "",
 462                 enrollee->manufacturer ? enrollee->manufacturer : "",
 463                 enrollee->model_name ? enrollee->model_name : "",
 464                 enrollee->model_number ? enrollee->model_number : "",
 465                 enrollee->serial_number ? enrollee->serial_number : "");
 466 }
 467
 468
 469 static void wpa_supplicant_wps_event_er_enrollee_remove(
 470         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 471 {
 472         char uuid_str[100];
 473         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 474         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
 475                 uuid_str, MAC2STR(enrollee->mac_addr));
 476 }
 477
 478
 479 static void wpa_supplicant_wps_event_er_ap_settings(
 480         struct wpa_supplicant *wpa_s,
 481         struct wps_event_er_ap_settings *ap_settings)
 482 {
 483         char uuid_str[100];
 484         char key_str[65];
 485         const struct wps_credential *cred = ap_settings->cred;
 486
 487         key_str[0] = '\0';
 488         if (cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 489                 if (cred->key_len >= 8 && cred->key_len <= 64) {
 490                         os_memcpy(key_str, cred->key, cred->key_len);
 491                         key_str[cred->key_len] = '\0';
 492                 }
 493         }
 494
 495         uuid_bin2str(ap_settings->uuid, uuid_str, sizeof(uuid_str));
 496         /* Use wpa_msg_ctrl to avoid showing the key in debug log */
 497         wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_SETTINGS
 498                      "uuid=%s ssid=%s auth_type=0x%04x encr_type=0x%04x "
 499                      "key=%s",
 500                      uuid_str, wpa_ssid_txt(cred->ssid, cred->ssid_len),
 501                      cred->auth_type, cred->encr_type, key_str);
 502 }
 503
 504
 505 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 506                                      union wps_event_data *data)
 507 {
 508         struct wpa_supplicant *wpa_s = ctx;
 509         switch (event) {
 510         case WPS_EV_M2D:
 511                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 512                 break;
 513         case WPS_EV_FAIL:
 514                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 515                 break;
 516         case WPS_EV_SUCCESS:
 517                 wpa_supplicant_wps_event_success(wpa_s);
 518                 break;
 519         case WPS_EV_PWD_AUTH_FAIL:
 520                 break;
 521         case WPS_EV_PBC_OVERLAP:
 522                 break;
 523         case WPS_EV_PBC_TIMEOUT:
 524                 break;
 525         case WPS_EV_ER_AP_ADD:
 526                 wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
 527                 break;
 528         case WPS_EV_ER_AP_REMOVE:
 529                 wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
 530                 break;
 531         case WPS_EV_ER_ENROLLEE_ADD:
 532                 wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
 533                                                          &data->enrollee);
 534                 break;
 535         case WPS_EV_ER_ENROLLEE_REMOVE:
 536                 wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
 537                                                             &data->enrollee);
 538                 break;
 539         case WPS_EV_ER_AP_SETTINGS:
 540                 wpa_supplicant_wps_event_er_ap_settings(wpa_s,
 541                                                         &data->ap_settings);
 542                 break;
 543         }
 544 }
 545
 546
 547 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 548 {
 549         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 550             eap_is_wps_pin_enrollee(&ssid->eap))
 551                 return WPS_REQ_ENROLLEE;
 552         else
 553                 return WPS_REQ_REGISTRAR;
 554 }
 555
 556
 557 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 558 {
 559         int id;
 560         struct wpa_ssid *ssid, *remove_ssid = NULL;
 561
 562         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 563
 564         /* Remove any existing WPS network from configuration */
 565         ssid = wpa_s->conf->ssid;
 566         while (ssid) {
 567                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 568                         if (ssid == wpa_s->current_ssid) {
 569                                 wpa_s->current_ssid = NULL;
 570                                 if (ssid != NULL)
 571                                         wpas_notify_network_changed(wpa_s);
 572                         }
 573                         id = ssid->id;
 574                         remove_ssid = ssid;
 575                 } else
 576                         id = -1;
 577                 ssid = ssid->next;
 578                 if (id >= 0) {
 579                         wpas_notify_network_removed(wpa_s, remove_ssid);
 580                         wpa_config_remove_network(wpa_s->conf, id);
 581                 }
 582         }
 583 }
 584
 585
 586 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 587 {
 588         struct wpa_supplicant *wpa_s = eloop_ctx;
 589         wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 590                    "out");
 591         wpas_clear_wps(wpa_s);
 592 }
 593
 594
 595 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 596                                               int registrar, const u8 *bssid)
 597 {
 598         struct wpa_ssid *ssid;
 599
 600         ssid = wpa_config_add_network(wpa_s->conf);
 601         if (ssid == NULL)
 602                 return NULL;
 603         wpas_notify_network_added(wpa_s, ssid);
 604         wpa_config_set_network_defaults(ssid);
 605         ssid->temporary = 1;
 606         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 607             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 608             wpa_config_set(ssid, "identity", registrar ?
 609                            "\"" WSC_ID_REGISTRAR "\"" :
 610                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 611                 wpas_notify_network_removed(wpa_s, ssid);
 612                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 613                 return NULL;
 614         }
 615
 616         if (bssid) {
 617 #ifndef CONFIG_P2P
 618                 struct wpa_bss *bss;
 619                 int count = 0;
 620 #endif /* CONFIG_P2P */
 621
 622                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 623                 ssid->bssid_set = 1;
 624
 625                 /*
 626                  * Note: With P2P, the SSID may change at the time the WPS
 627                  * provisioning is started, so better not filter the AP based
 628                  * on the current SSID in the scan results.
 629                  */
 630 #ifndef CONFIG_P2P
 631                 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 632                         if (os_memcmp(bssid, bss->bssid, ETH_ALEN) != 0)
 633                                 continue;
 634
 635                         os_free(ssid->ssid);
 636                         ssid->ssid = os_malloc(bss->ssid_len);
 637                         if (ssid->ssid == NULL)
 638                                 break;
 639                         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 640                         ssid->ssid_len = bss->ssid_len;
 641                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Picked SSID from "
 642                                           "scan results",
 643                                           ssid->ssid, ssid->ssid_len);
 644                         count++;
 645                 }
 646
 647                 if (count > 1) {
 648                         wpa_printf(MSG_DEBUG, "WPS: More than one SSID found "
 649                                    "for the AP; use wildcard");
 650                         os_free(ssid->ssid);
 651                         ssid->ssid = NULL;
 652                         ssid->ssid_len = 0;
 653                 }
 654 #endif /* CONFIG_P2P */
 655         }
 656
 657         return ssid;
 658 }
 659
 660
 661 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 662                              struct wpa_ssid *selected)
 663 {
 664         struct wpa_ssid *ssid;
 665
 666         /* Mark all other networks disabled and trigger reassociation */
 667         ssid = wpa_s->conf->ssid;
 668         while (ssid) {
 669                 int was_disabled = ssid->disabled;
 670                 ssid->disabled = ssid != selected;
 671                 if (was_disabled != ssid->disabled)
 672                         wpas_notify_network_enabled_changed(wpa_s, ssid);
 673                 ssid = ssid->next;
 674         }
 675         wpa_s->disconnected = 0;
 676         wpa_s->reassociate = 1;
 677         wpa_s->scan_runs = 0;
 678         wpa_s->wps_success = 0;
 679         wpa_s->blacklist_cleared = 0;
 680         wpa_supplicant_req_scan(wpa_s, 0, 0);
 681 }
 682
 683
 684 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid,
 685                        int p2p_group)
 686 {
 687         struct wpa_ssid *ssid;
 688         wpas_clear_wps(wpa_s);
 689         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 690         if (ssid == NULL)
 691                 return -1;
 692         ssid->temporary = 1;
 693         ssid->p2p_group = p2p_group;
 694         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 695         if (wpa_s->wps_fragment_size)
 696                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 697         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 698                                wpa_s, NULL);
 699         wpas_wps_reassoc(wpa_s, ssid);
 700         return 0;
 701 }
 702
 703
 704 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 705                        const char *pin, int p2p_group, u16 dev_pw_id)
 706 {
 707         struct wpa_ssid *ssid;
 708         char val[128];
 709         unsigned int rpin = 0;
 710
 711         wpas_clear_wps(wpa_s);
 712         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 713         if (ssid == NULL)
 714                 return -1;
 715         ssid->temporary = 1;
 716         ssid->p2p_group = p2p_group;
 717         if (pin)
 718                 os_snprintf(val, sizeof(val), "\"pin=%s dev_pw_id=%u\"",
 719                             pin, dev_pw_id);
 720         else {
 721                 rpin = wps_generate_pin();
 722                 os_snprintf(val, sizeof(val), "\"pin=%08d dev_pw_id=%u\"",
 723                             rpin, dev_pw_id);
 724         }
 725         wpa_config_set(ssid, "phase1", val, 0);
 726         if (wpa_s->wps_fragment_size)
 727                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 728         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 729                                wpa_s, NULL);
 730         wpas_wps_reassoc(wpa_s, ssid);
 731         return rpin;
 732 }
 733
 734
 735 #ifdef CONFIG_WPS_OOB
 736 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 737                        char *path, char *method, char *name)
 738 {
 739         struct wps_context *wps = wpa_s->wps;
 740         struct oob_device_data *oob_dev;
 741
 742         oob_dev = wps_get_oob_device(device_type);
 743         if (oob_dev == NULL)
 744                 return -1;
 745         oob_dev->device_path = path;
 746         oob_dev->device_name = name;
 747         wps->oob_conf.oob_method = wps_get_oob_method(method);
 748
 749         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 750                 /*
 751                  * Use pre-configured DH keys in order to be able to write the
 752                  * key hash into the OOB file.
 753                  */
 754                 wpabuf_free(wps->dh_pubkey);
 755                 wpabuf_free(wps->dh_privkey);
 756                 wps->dh_privkey = NULL;
 757                 wps->dh_pubkey = NULL;
 758                 dh5_free(wps->dh_ctx);
 759                 wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
 760                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 761                 if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
 762                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 763                                    "Diffie-Hellman handshake");
 764                         return -1;
 765                 }
 766         }
 767
 768         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 769                 wpas_clear_wps(wpa_s);
 770
 771         if (wps_process_oob(wps, oob_dev, 0) < 0)
 772                 return -1;
 773
 774         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 775              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 776             wpas_wps_start_pin(wpa_s, NULL,
 777                                wpabuf_head(wps->oob_conf.dev_password), 0) < 0)
 778                         return -1;
 779
 780         return 0;
 781 }
 782 #endif /* CONFIG_WPS_OOB */
 783
 784
 785 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 786                        const char *pin, struct wps_new_ap_settings *settings)
 787 {
 788         struct wpa_ssid *ssid;
 789         char val[200];
 790         char *pos, *end;
 791         int res;
 792
 793         if (!pin)
 794                 return -1;
 795         wpas_clear_wps(wpa_s);
 796         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 797         if (ssid == NULL)
 798                 return -1;
 799         ssid->temporary = 1;
 800         pos = val;
 801         end = pos + sizeof(val);
 802         res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
 803         if (res < 0 || res >= end - pos)
 804                 return -1;
 805         pos += res;
 806         if (settings) {
 807                 res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
 808                                   "new_encr=%s new_key=%s",
 809                                   settings->ssid_hex, settings->auth,
 810                                   settings->encr, settings->key_hex);
 811                 if (res < 0 || res >= end - pos)
 812                         return -1;
 813                 pos += res;
 814         }
 815         res = os_snprintf(pos, end - pos, "\"");
 816         if (res < 0 || res >= end - pos)
 817                 return -1;
 818         wpa_config_set(ssid, "phase1", val, 0);
 819         if (wpa_s->wps_fragment_size)
 820                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 821         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 822                                wpa_s, NULL);
 823         wpas_wps_reassoc(wpa_s, ssid);
 824         return 0;
 825 }
 826
 827
 828 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 829                                size_t psk_len)
 830 {
 831         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 832                    "STA " MACSTR, MAC2STR(mac_addr));
 833         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 834
 835         /* TODO */
 836
 837         return 0;
 838 }
 839
 840
 841 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 842                                    const struct wps_device_data *dev)
 843 {
 844         char uuid[40], txt[400];
 845         int len;
 846         char devtype[WPS_DEV_TYPE_BUFSIZE];
 847         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 848                 return;
 849         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 850         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 851                           " [%s|%s|%s|%s|%s|%s]",
 852                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 853                           dev->manufacturer, dev->model_name,
 854                           dev->model_number, dev->serial_number,
 855                           wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 856                                                sizeof(devtype)));
 857         if (len > 0 && len < (int) sizeof(txt))
 858                 wpa_printf(MSG_INFO, "%s", txt);
 859 }
 860
 861
 862 static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
 863                                     u16 sel_reg_config_methods)
 864 {
 865 #ifdef CONFIG_WPS_ER
 866         struct wpa_supplicant *wpa_s = ctx;
 867
 868         if (wpa_s->wps_er == NULL)
 869                 return;
 870         wpa_printf(MSG_DEBUG, "WPS ER: SetSelectedRegistrar - sel_reg=%d "
 871                    "dev_password_id=%u sel_reg_config_methods=0x%x",
 872                    sel_reg, dev_passwd_id, sel_reg_config_methods);
 873         wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
 874                            sel_reg_config_methods);
 875 #endif /* CONFIG_WPS_ER */
 876 }
 877
 878
 879 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 880 {
 881         struct wps_context *wps;
 882         struct wps_registrar_config rcfg;
 883
 884         wps = os_zalloc(sizeof(*wps));
 885         if (wps == NULL)
 886                 return -1;
 887
 888         wps->cred_cb = wpa_supplicant_wps_cred;
 889         wps->event_cb = wpa_supplicant_wps_event;
 890         wps->cb_ctx = wpa_s;
 891
 892         wps->dev.device_name = wpa_s->conf->device_name;
 893         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 894         wps->dev.model_name = wpa_s->conf->model_name;
 895         wps->dev.model_number = wpa_s->conf->model_number;
 896         wps->dev.serial_number = wpa_s->conf->serial_number;
 897         wps->config_methods =
 898                 wps_config_methods_str2bin(wpa_s->conf->config_methods);
 899         if ((wps->config_methods & (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
 900             (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
 901                 wpa_printf(MSG_ERROR, "WPS: Both Label and Display config "
 902                            "methods are not allowed at the same time");
 903                 os_free(wps);
 904                 return -1;
 905         }
 906         if (wpa_s->conf->device_type &&
 907             wps_dev_type_str2bin(wpa_s->conf->device_type,
 908                                  wps->dev.pri_dev_type) < 0) {
 909                 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 910                 os_free(wps);
 911                 return -1;
 912         }
 913         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 914         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 915         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 916         if (is_nil_uuid(wpa_s->conf->uuid)) {
 917                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 918                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 919                             wps->uuid, WPS_UUID_LEN);
 920         } else
 921                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 922
 923         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 924         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 925
 926         os_memset(&rcfg, 0, sizeof(rcfg));
 927         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 928         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 929         rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
 930         rcfg.cb_ctx = wpa_s;
 931
 932         wps->registrar = wps_registrar_init(wps, &rcfg);
 933         if (wps->registrar == NULL) {
 934                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 935                 os_free(wps);
 936                 return -1;
 937         }
 938
 939         wpa_s->wps = wps;
 940
 941         return 0;
 942 }
 943
 944
 945 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 946 {
 947         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 948
 949         if (wpa_s->wps == NULL)
 950                 return;
 951
 952 #ifdef CONFIG_WPS_ER
 953         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
 954         wpa_s->wps_er = NULL;
 955 #endif /* CONFIG_WPS_ER */
 956
 957         wps_registrar_deinit(wpa_s->wps->registrar);
 958         wpabuf_free(wpa_s->wps->dh_pubkey);
 959         wpabuf_free(wpa_s->wps->dh_privkey);
 960         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
 961         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
 962         os_free(wpa_s->wps->network_key);
 963         os_free(wpa_s->wps);
 964         wpa_s->wps = NULL;
 965 }
 966
 967
 968 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
 969                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 970 {
 971         struct wpabuf *wps_ie;
 972
 973         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 974                 return -1;
 975
 976         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 977         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 978                 if (!wps_ie) {
 979                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 980                         return 0;
 981                 }
 982
 983                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 984                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 985                                    "without active PBC Registrar");
 986                         wpabuf_free(wps_ie);
 987                         return 0;
 988                 }
 989
 990                 /* TODO: overlap detection */
 991                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 992                            "(Active PBC)");
 993                 wpabuf_free(wps_ie);
 994                 return 1;
 995         }
 996
 997         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 998                 if (!wps_ie) {
 999                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
1000                         return 0;
1001                 }
1002
1003                 /*
1004                  * Start with WPS APs that advertise our address as an
1005                  * authorized MAC (v2.0) or active PIN Registrar (v1.0) and
1006                  * allow any WPS AP after couple of scans since some APs do not
1007                  * set Selected Registrar attribute properly when using
1008                  * external Registrar.
1009                  */
1010                 if (!wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1)) {
1011                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
1012                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
1013                                            "without active PIN Registrar");
1014                                 wpabuf_free(wps_ie);
1015                                 return 0;
1016                         }
1017                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1018                 } else {
1019                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
1020                                    "(Authorized MAC or Active PIN)");
1021                 }
1022                 wpabuf_free(wps_ie);
1023                 return 1;
1024         }
1025
1026         if (wps_ie) {
1027                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1028                 wpabuf_free(wps_ie);
1029                 return 1;
1030         }
1031
1032         return -1;
1033 }
1034
1035
1036 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
1037                               struct wpa_ssid *ssid,
1038                               struct wpa_scan_res *bss)
1039 {
1040         struct wpabuf *wps_ie = NULL;
1041         int ret = 0;
1042
1043         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
1044                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1045                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
1046                         /* allow wildcard SSID for WPS PBC */
1047                         ret = 1;
1048                 }
1049         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
1050                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1051                 if (wps_ie &&
1052                     (wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1) ||
1053                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
1054                         /* allow wildcard SSID for WPS PIN */
1055                         ret = 1;
1056                 }
1057         }
1058
1059         if (!ret && ssid->bssid_set &&
1060             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
1061                 /* allow wildcard SSID due to hardcoded BSSID match */
1062                 ret = 1;
1063         }
1064
1065 #ifdef CONFIG_WPS_STRICT
1066         if (wps_ie) {
1067                 if (wps_validate_beacon_probe_resp(wps_ie, bss->beacon_ie_len >
1068                                                    0) < 0)
1069                         ret = 0;
1070                 if (bss->beacon_ie_len) {
1071                         struct wpabuf *bcn_wps;
1072                         bcn_wps = wpa_scan_get_vendor_ie_multi_beacon(
1073                                 bss, WPS_IE_VENDOR_TYPE);
1074                         if (bcn_wps == NULL) {
1075                                 wpa_printf(MSG_DEBUG, "WPS: Mandatory WPS IE "
1076                                            "missing from AP Beacon");
1077                                 ret = 0;
1078                         } else {
1079                                 if (wps_validate_beacon(wps_ie) < 0)
1080                                         ret = 0;
1081                                 wpabuf_free(bcn_wps);
1082                         }
1083                 }
1084         }
1085 #endif /* CONFIG_WPS_STRICT */
1086
1087         wpabuf_free(wps_ie);
1088
1089         return ret;
1090 }
1091
1092
1093 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
1094                               struct wpa_bss *selected, struct wpa_ssid *ssid)
1095 {
1096         const u8 *sel_uuid, *uuid;
1097         struct wpabuf *wps_ie;
1098         int ret = 0;
1099         struct wpa_bss *bss;
1100
1101         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
1102                 return 0;
1103
1104         /* Make sure that only one AP is in active PBC mode */
1105         wps_ie = wpa_bss_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
1106         if (wps_ie)
1107                 sel_uuid = wps_get_uuid_e(wps_ie);
1108         else
1109                 sel_uuid = NULL;
1110
1111         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1112                 struct wpabuf *ie;
1113                 if (bss == selected)
1114                         continue;
1115                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1116                 if (!ie)
1117                         continue;
1118                 if (!wps_is_selected_pbc_registrar(ie)) {
1119                         wpabuf_free(ie);
1120                         continue;
1121                 }
1122                 uuid = wps_get_uuid_e(ie);
1123                 if (sel_uuid == NULL || uuid == NULL ||
1124                     os_memcmp(sel_uuid, uuid, 16) != 0) {
1125                         ret = 1; /* PBC overlap */
1126                         wpabuf_free(ie);
1127                         break;
1128                 }
1129
1130                 /* TODO: verify that this is reasonable dual-band situation */
1131
1132                 wpabuf_free(ie);
1133         }
1134
1135         wpabuf_free(wps_ie);
1136
1137         return ret;
1138 }
1139
1140
1141 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
1142 {
1143         struct wpa_bss *bss;
1144
1145         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
1146                 return;
1147
1148         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1149                 struct wpabuf *ie;
1150                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1151                 if (!ie)
1152                         continue;
1153                 if (wps_is_selected_pbc_registrar(ie))
1154                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1155                                      WPS_EVENT_AP_AVAILABLE_PBC);
1156                 else if (wps_is_addr_authorized(ie, wpa_s->own_addr, 0))
1157                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1158                                      WPS_EVENT_AP_AVAILABLE_AUTH);
1159                 else if (wps_is_selected_pin_registrar(ie))
1160                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1161                                      WPS_EVENT_AP_AVAILABLE_PIN);
1162                 else
1163                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1164                                      WPS_EVENT_AP_AVAILABLE);
1165                 wpabuf_free(ie);
1166                 break;
1167         }
1168 }
1169
1170
1171 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
1172 {
1173         struct wpa_ssid *ssid;
1174
1175         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1176                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
1177                         return 1;
1178         }
1179
1180         return 0;
1181 }
1182
1183
1184 int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
1185                               char *end)
1186 {
1187         struct wpabuf *wps_ie;
1188         int ret;
1189
1190         wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
1191         if (wps_ie == NULL)
1192                 return 0;
1193
1194         ret = wps_attr_text(wps_ie, buf, end);
1195         wpabuf_free(wps_ie);
1196         return ret;
1197 }
1198
1199
1200 int wpas_wps_er_start(struct wpa_supplicant *wpa_s, const char *filter)
1201 {
1202 #ifdef CONFIG_WPS_ER
1203         if (wpa_s->wps_er) {
1204                 wps_er_refresh(wpa_s->wps_er);
1205                 return 0;
1206         }
1207         wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname, filter);
1208         if (wpa_s->wps_er == NULL)
1209                 return -1;
1210         return 0;
1211 #else /* CONFIG_WPS_ER */
1212         return 0;
1213 #endif /* CONFIG_WPS_ER */
1214 }
1215
1216
1217 int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
1218 {
1219 #ifdef CONFIG_WPS_ER
1220         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
1221         wpa_s->wps_er = NULL;
1222 #endif /* CONFIG_WPS_ER */
1223         return 0;
1224 }
1225
1226
1227 #ifdef CONFIG_WPS_ER
1228 int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const u8 *addr,
1229                         const char *uuid, const char *pin)
1230 {
1231         u8 u[UUID_LEN];
1232         int any = 0;
1233
1234         if (os_strcmp(uuid, "any") == 0)
1235                 any = 1;
1236         else if (uuid_str2bin(uuid, u))
1237                 return -1;
1238         return wps_registrar_add_pin(wpa_s->wps->registrar, addr,
1239                                      any ? NULL : u,
1240                                      (const u8 *) pin, os_strlen(pin), 300);
1241 }
1242
1243
1244 int wpas_wps_er_pbc(struct wpa_supplicant *wpa_s, const char *uuid)
1245 {
1246         u8 u[UUID_LEN];
1247
1248         if (uuid_str2bin(uuid, u))
1249                 return -1;
1250         return wps_er_pbc(wpa_s->wps_er, u);
1251 }
1252
1253
1254 int wpas_wps_er_learn(struct wpa_supplicant *wpa_s, const char *uuid,
1255                       const char *pin)
1256 {
1257         u8 u[UUID_LEN];
1258
1259         if (uuid_str2bin(uuid, u))
1260                 return -1;
1261         return wps_er_learn(wpa_s->wps_er, u, (const u8 *) pin,
1262                             os_strlen(pin));
1263 }
1264
1265
1266 int wpas_wps_er_config(struct wpa_supplicant *wpa_s, const char *uuid,
1267                        const char *pin, struct wps_new_ap_settings *settings)
1268 {
1269         u8 u[UUID_LEN];
1270         struct wps_credential cred;
1271         size_t len;
1272
1273         if (uuid_str2bin(uuid, u))
1274                 return -1;
1275         if (settings->ssid_hex == NULL || settings->auth == NULL ||
1276             settings->encr == NULL || settings->key_hex == NULL)
1277                 return -1;
1278
1279         os_memset(&cred, 0, sizeof(cred));
1280         len = os_strlen(settings->ssid_hex);
1281         if ((len & 1) || len > 2 * sizeof(cred.ssid) ||
1282             hexstr2bin(settings->ssid_hex, cred.ssid, len / 2))
1283                 return -1;
1284         cred.ssid_len = len / 2;
1285
1286         len = os_strlen(settings->key_hex);
1287         if ((len & 1) || len > 2 * sizeof(cred.key) ||
1288             hexstr2bin(settings->key_hex, cred.key, len / 2))
1289                 return -1;
1290         cred.key_len = len / 2;
1291
1292         if (os_strcmp(settings->auth, "OPEN") == 0)
1293                 cred.auth_type = WPS_AUTH_OPEN;
1294         else if (os_strcmp(settings->auth, "WPAPSK") == 0)
1295                 cred.auth_type = WPS_AUTH_WPAPSK;
1296         else if (os_strcmp(settings->auth, "WPA2PSK") == 0)
1297                 cred.auth_type = WPS_AUTH_WPA2PSK;
1298         else
1299                 return -1;
1300
1301         if (os_strcmp(settings->encr, "NONE") == 0)
1302                 cred.encr_type = WPS_ENCR_NONE;
1303         else if (os_strcmp(settings->encr, "WEP") == 0)
1304                 cred.encr_type = WPS_ENCR_WEP;
1305         else if (os_strcmp(settings->encr, "TKIP") == 0)
1306                 cred.encr_type = WPS_ENCR_TKIP;
1307         else if (os_strcmp(settings->encr, "CCMP") == 0)
1308                 cred.encr_type = WPS_ENCR_AES;
1309         else
1310                 return -1;
1311
1312         return wps_er_config(wpa_s->wps_er, u, (const u8 *) pin,
1313                              os_strlen(pin), &cred);
1314 }
1315
1316
1317 static void wpas_wps_terminate_cb(void *ctx)
1318 {
1319         wpa_printf(MSG_DEBUG, "WPS ER: Terminated");
1320         eloop_terminate();
1321 }
1322 #endif /* CONFIG_WPS_ER */
1323
1324
1325 int wpas_wps_terminate_pending(struct wpa_supplicant *wpa_s)
1326 {
1327 #ifdef CONFIG_WPS_ER
1328         if (wpa_s->wps_er) {
1329                 wps_er_deinit(wpa_s->wps_er, wpas_wps_terminate_cb, wpa_s);
1330                 wpa_s->wps_er = NULL;
1331                 return 1;
1332         }
1333 #endif /* CONFIG_WPS_ER */
1334         return 0;
1335 }
1336
1337
1338 int wpas_wps_in_progress(struct wpa_supplicant *wpa_s)
1339 {
1340         struct wpa_ssid *ssid;
1341
1342         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1343                 if (!ssid->disabled && ssid->key_mgmt == WPA_KEY_MGMT_WPS)
1344                         return 1;
1345         }
1346
1347         return 0;
1348 }
1349
1350
1351 void wpas_wps_update_config(struct wpa_supplicant *wpa_s)
1352 {
1353         struct wps_context *wps = wpa_s->wps;
1354
1355         if (wps == NULL)
1356                 return;
1357
1358         if (wpa_s->conf->changed_parameters & CFG_CHANGED_CONFIG_METHODS) {
1359                 wps->config_methods = wps_config_methods_str2bin(
1360                         wpa_s->conf->config_methods);
1361                 if ((wps->config_methods &
1362                      (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
1363                     (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
1364                         wpa_printf(MSG_ERROR, "WPS: Both Label and Display "
1365                                    "config methods are not allowed at the "
1366                                    "same time");
1367                         wps->config_methods &= ~WPS_CONFIG_LABEL;
1368                 }
1369         }
1370
1371         if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_TYPE) {
1372                 if (wpa_s->conf->device_type &&
1373                     wps_dev_type_str2bin(wpa_s->conf->device_type,
1374                                          wps->dev.pri_dev_type) < 0)
1375                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
1376         }
1377
1378         if (wpa_s->conf->changed_parameters & CFG_CHANGED_OS_VERSION)
1379                 wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
1380
1381         if (wpa_s->conf->changed_parameters & CFG_CHANGED_UUID) {
1382                 if (is_nil_uuid(wpa_s->conf->uuid)) {
1383                         uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
1384                         wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
1385                                     "address", wps->uuid, WPS_UUID_LEN);
1386                 } else
1387                         os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
1388         }
1389
1390         if (wpa_s->conf->changed_parameters &
1391             (CFG_CHANGED_DEVICE_NAME | CFG_CHANGED_WPS_STRING)) {
1392                 /* Update pointers to make sure they refer current values */
1393                 wps->dev.device_name = wpa_s->conf->device_name;
1394                 wps->dev.manufacturer = wpa_s->conf->manufacturer;
1395                 wps->dev.model_name = wpa_s->conf->model_name;
1396                 wps->dev.model_number = wpa_s->conf->model_number;
1397                 wps->dev.serial_number = wpa_s->conf->serial_number;
1398         }
1399 }