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 "ap.h"
  36 #include "p2p/p2p.h"
  37 #include "p2p_supplicant.h"
  38 #include "wps_supplicant.h"
  39
  40
  41 #ifndef WPS_PIN_SCAN_IGNORE_SEL_REG
  42 #define WPS_PIN_SCAN_IGNORE_SEL_REG 3
  43 #endif /* WPS_PIN_SCAN_IGNORE_SEL_REG */
  44
  45 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
  46 static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
  47
  48
  49 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
  50 {
  51         if (!wpa_s->wps_success &&
  52             wpa_s->current_ssid &&
  53             eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
  54                 const u8 *bssid = wpa_s->bssid;
  55                 if (is_zero_ether_addr(bssid))
  56                         bssid = wpa_s->pending_bssid;
  57
  58                 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
  59                            " did not succeed - continue trying to find "
  60                            "suitable AP", MAC2STR(bssid));
  61                 wpa_blacklist_add(wpa_s, bssid);
  62
  63                 wpa_supplicant_deauthenticate(wpa_s,
  64                                               WLAN_REASON_DEAUTH_LEAVING);
  65                 wpa_s->reassociate = 1;
  66                 wpa_supplicant_req_scan(wpa_s,
  67                                         wpa_s->blacklist_cleared ? 5 : 0, 0);
  68                 wpa_s->blacklist_cleared = 0;
  69                 return 1;
  70         }
  71
  72         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
  73
  74         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
  75             !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
  76                 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
  77                            "try to associate with the received credential");
  78                 wpa_supplicant_deauthenticate(wpa_s,
  79                                               WLAN_REASON_DEAUTH_LEAVING);
  80                 wpa_s->after_wps = 5;
  81                 wpa_s->wps_freq = wpa_s->assoc_freq;
  82                 wpa_s->reassociate = 1;
  83                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  84                 return 1;
  85         }
  86
  87         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
  88                 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
  89                            "for external credential processing");
  90                 wpas_clear_wps(wpa_s);
  91                 wpa_supplicant_deauthenticate(wpa_s,
  92                                               WLAN_REASON_DEAUTH_LEAVING);
  93                 return 1;
  94         }
  95
  96         return 0;
  97 }
  98
  99
 100 static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
 101                                          struct wpa_ssid *ssid,
 102                                          const struct wps_credential *cred)
 103 {
 104         struct wpa_driver_capa capa;
 105         struct wpa_bss *bss;
 106         const u8 *ie;
 107         struct wpa_ie_data adv;
 108         int wpa2 = 0, ccmp = 0;
 109
 110         /*
 111          * Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
 112          * case they are configured for mixed mode operation (WPA+WPA2 and
 113          * TKIP+CCMP). Try to use scan results to figure out whether the AP
 114          * actually supports stronger security and select that if the client
 115          * has support for it, too.
 116          */
 117
 118         if (wpa_drv_get_capa(wpa_s, &capa))
 119                 return; /* Unknown what driver supports */
 120
 121         bss = wpa_bss_get(wpa_s, cred->mac_addr, ssid->ssid, ssid->ssid_len);
 122         if (bss == NULL) {
 123                 wpa_printf(MSG_DEBUG, "WPS: The AP was not found from BSS "
 124                            "table - use credential as-is");
 125                 return;
 126         }
 127
 128         wpa_printf(MSG_DEBUG, "WPS: AP found from BSS table");
 129
 130         ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 131         if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
 132                 wpa2 = 1;
 133                 if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
 134                         ccmp = 1;
 135         } else {
 136                 ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 137                 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
 138                     adv.pairwise_cipher & WPA_CIPHER_CCMP)
 139                         ccmp = 1;
 140         }
 141
 142         if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
 143             (ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
 144                 /*
 145                  * TODO: This could be the initial AP configuration and the
 146                  * Beacon contents could change shortly. Should request a new
 147                  * scan and delay addition of the network until the updated
 148                  * scan results are available.
 149                  */
 150                 wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
 151                            "support - use credential as-is");
 152                 return;
 153         }
 154
 155         if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 156             (ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
 157             (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
 158                 wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
 159                            "based on scan results");
 160                 if (wpa_s->conf->ap_scan == 1)
 161                         ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
 162                 else
 163                         ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 164         }
 165
 166         if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
 167             (ssid->proto & WPA_PROTO_WPA) &&
 168             (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
 169                 wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
 170                            "based on scan results");
 171                 if (wpa_s->conf->ap_scan == 1)
 172                         ssid->proto |= WPA_PROTO_RSN;
 173                 else
 174                         ssid->proto = WPA_PROTO_RSN;
 175         }
 176 }
 177
 178
 179 static int wpa_supplicant_wps_cred(void *ctx,
 180                                    const struct wps_credential *cred)
 181 {
 182         struct wpa_supplicant *wpa_s = ctx;
 183         struct wpa_ssid *ssid = wpa_s->current_ssid;
 184         u8 key_idx = 0;
 185         u16 auth_type;
 186
 187         if ((wpa_s->conf->wps_cred_processing == 1 ||
 188              wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) {
 189                 size_t blen = cred->cred_attr_len * 2 + 1;
 190                 char *buf = os_malloc(blen);
 191                 if (buf) {
 192                         wpa_snprintf_hex(buf, blen,
 193                                          cred->cred_attr, cred->cred_attr_len);
 194                         wpa_msg(wpa_s, MSG_INFO, "%s%s",
 195                                 WPS_EVENT_CRED_RECEIVED, buf);
 196                         os_free(buf);
 197                 }
 198
 199                 wpas_notify_wps_credential(wpa_s, cred);
 200         } else
 201                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
 202
 203         wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
 204                         cred->cred_attr, cred->cred_attr_len);
 205
 206         if (wpa_s->conf->wps_cred_processing == 1)
 207                 return 0;
 208
 209         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
 210         wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
 211                    cred->auth_type);
 212         wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
 213         wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
 214         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
 215                         cred->key, cred->key_len);
 216         wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
 217                    MAC2STR(cred->mac_addr));
 218
 219         auth_type = cred->auth_type;
 220         if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 221                 wpa_printf(MSG_DEBUG, "WPS: Workaround - convert mixed-mode "
 222                            "auth_type into WPA2PSK");
 223                 auth_type = WPS_AUTH_WPA2PSK;
 224         }
 225
 226         if (auth_type != WPS_AUTH_OPEN &&
 227             auth_type != WPS_AUTH_SHARED &&
 228             auth_type != WPS_AUTH_WPAPSK &&
 229             auth_type != WPS_AUTH_WPA2PSK) {
 230                 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
 231                            "unsupported authentication type 0x%x",
 232                            auth_type);
 233                 return 0;
 234         }
 235
 236         if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 237                 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
 238                            "on the received credential");
 239                 os_free(ssid->eap.identity);
 240                 ssid->eap.identity = NULL;
 241                 ssid->eap.identity_len = 0;
 242                 os_free(ssid->eap.phase1);
 243                 ssid->eap.phase1 = NULL;
 244                 os_free(ssid->eap.eap_methods);
 245                 ssid->eap.eap_methods = NULL;
 246                 if (!ssid->p2p_group)
 247                         ssid->temporary = 0;
 248         } else {
 249                 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
 250                            "received credential");
 251                 ssid = wpa_config_add_network(wpa_s->conf);
 252                 if (ssid == NULL)
 253                         return -1;
 254                 wpas_notify_network_added(wpa_s, ssid);
 255         }
 256
 257         wpa_config_set_network_defaults(ssid);
 258
 259         os_free(ssid->ssid);
 260         ssid->ssid = os_malloc(cred->ssid_len);
 261         if (ssid->ssid) {
 262                 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
 263                 ssid->ssid_len = cred->ssid_len;
 264         }
 265
 266         switch (cred->encr_type) {
 267         case WPS_ENCR_NONE:
 268                 break;
 269         case WPS_ENCR_WEP:
 270                 if (cred->key_len <= 0)
 271                         break;
 272                 if (cred->key_len != 5 && cred->key_len != 13 &&
 273                     cred->key_len != 10 && cred->key_len != 26) {
 274                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
 275                                    "%lu", (unsigned long) cred->key_len);
 276                         return -1;
 277                 }
 278                 if (cred->key_idx > NUM_WEP_KEYS) {
 279                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
 280                                    cred->key_idx);
 281                         return -1;
 282                 }
 283                 if (cred->key_idx)
 284                         key_idx = cred->key_idx - 1;
 285                 if (cred->key_len == 10 || cred->key_len == 26) {
 286                         if (hexstr2bin((char *) cred->key,
 287                                        ssid->wep_key[key_idx],
 288                                        cred->key_len / 2) < 0) {
 289                                 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
 290                                            "%d", key_idx);
 291                                 return -1;
 292                         }
 293                         ssid->wep_key_len[key_idx] = cred->key_len / 2;
 294                 } else {
 295                         os_memcpy(ssid->wep_key[key_idx], cred->key,
 296                                   cred->key_len);
 297                         ssid->wep_key_len[key_idx] = cred->key_len;
 298                 }
 299                 ssid->wep_tx_keyidx = key_idx;
 300                 break;
 301         case WPS_ENCR_TKIP:
 302                 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
 303                 break;
 304         case WPS_ENCR_AES:
 305                 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 306                 break;
 307         }
 308
 309         switch (auth_type) {
 310         case WPS_AUTH_OPEN:
 311                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 312                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 313                 ssid->proto = 0;
 314                 break;
 315         case WPS_AUTH_SHARED:
 316                 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 317                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 318                 ssid->proto = 0;
 319                 break;
 320         case WPS_AUTH_WPAPSK:
 321                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 322                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 323                 ssid->proto = WPA_PROTO_WPA;
 324                 break;
 325         case WPS_AUTH_WPA:
 326                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 327                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 328                 ssid->proto = WPA_PROTO_WPA;
 329                 break;
 330         case WPS_AUTH_WPA2:
 331                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 332                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 333                 ssid->proto = WPA_PROTO_RSN;
 334                 break;
 335         case WPS_AUTH_WPA2PSK:
 336                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 337                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 338                 ssid->proto = WPA_PROTO_RSN;
 339                 break;
 340         }
 341
 342         if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
 343                 if (cred->key_len == 2 * PMK_LEN) {
 344                         if (hexstr2bin((const char *) cred->key, ssid->psk,
 345                                        PMK_LEN)) {
 346                                 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
 347                                            "Key");
 348                                 return -1;
 349                         }
 350                         ssid->psk_set = 1;
 351                 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
 352                         os_free(ssid->passphrase);
 353                         ssid->passphrase = os_malloc(cred->key_len + 1);
 354                         if (ssid->passphrase == NULL)
 355                                 return -1;
 356                         os_memcpy(ssid->passphrase, cred->key, cred->key_len);
 357                         ssid->passphrase[cred->key_len] = '\0';
 358                         wpa_config_update_psk(ssid);
 359                 } else {
 360                         wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
 361                                    "length %lu",
 362                                    (unsigned long) cred->key_len);
 363                         return -1;
 364                 }
 365         }
 366
 367         wpas_wps_security_workaround(wpa_s, ssid, cred);
 368
 369 #ifndef CONFIG_NO_CONFIG_WRITE
 370         if (wpa_s->conf->update_config &&
 371             wpa_config_write(wpa_s->confname, wpa_s->conf)) {
 372                 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
 373                 return -1;
 374         }
 375 #endif /* CONFIG_NO_CONFIG_WRITE */
 376
 377         return 0;
 378 }
 379
 380
 381 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
 382                                          struct wps_event_m2d *m2d)
 383 {
 384         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
 385                 "dev_password_id=%d config_error=%d",
 386                 m2d->dev_password_id, m2d->config_error);
 387         wpas_notify_wps_event_m2d(wpa_s, m2d);
 388 }
 389
 390
 391 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
 392                                           struct wps_event_fail *fail)
 393 {
 394         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d config_error=%d",
 395                 fail->msg, fail->config_error);
 396         if (wpa_s->parent && wpa_s->parent != wpa_s)
 397                 wpa_msg(wpa_s->parent, MSG_INFO, WPS_EVENT_FAIL
 398                         "msg=%d config_error=%d",
 399                         fail->msg, fail->config_error);
 400         wpas_clear_wps(wpa_s);
 401         wpas_notify_wps_event_fail(wpa_s, fail);
 402 }
 403
 404
 405 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
 406 {
 407         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
 408         wpa_s->wps_success = 1;
 409         wpas_notify_wps_event_success(wpa_s);
 410 #ifdef CONFIG_P2P
 411         wpas_p2p_wps_success(wpa_s, wpa_s->bssid, 0);
 412 #endif /* CONFIG_P2P */
 413 }
 414
 415
 416 static void wpa_supplicant_wps_event_er_ap_add(struct wpa_supplicant *wpa_s,
 417                                                struct wps_event_er_ap *ap)
 418 {
 419         char uuid_str[100];
 420         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 421
 422         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 423         if (ap->pri_dev_type)
 424                 wps_dev_type_bin2str(ap->pri_dev_type, dev_type,
 425                                      sizeof(dev_type));
 426         else
 427                 dev_type[0] = '\0';
 428
 429         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s " MACSTR
 430                 " pri_dev_type=%s wps_state=%d |%s|%s|%s|%s|%s|%s|",
 431                 uuid_str, MAC2STR(ap->mac_addr), dev_type, ap->wps_state,
 432                 ap->friendly_name ? ap->friendly_name : "",
 433                 ap->manufacturer ? ap->manufacturer : "",
 434                 ap->model_description ? ap->model_description : "",
 435                 ap->model_name ? ap->model_name : "",
 436                 ap->manufacturer_url ? ap->manufacturer_url : "",
 437                 ap->model_url ? ap->model_url : "");
 438 }
 439
 440
 441 static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
 442                                                   struct wps_event_er_ap *ap)
 443 {
 444         char uuid_str[100];
 445         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 446         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
 447 }
 448
 449
 450 static void wpa_supplicant_wps_event_er_enrollee_add(
 451         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 452 {
 453         char uuid_str[100];
 454         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 455
 456         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 457         if (enrollee->pri_dev_type)
 458                 wps_dev_type_bin2str(enrollee->pri_dev_type, dev_type,
 459                                      sizeof(dev_type));
 460         else
 461                 dev_type[0] = '\0';
 462
 463         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
 464                 " M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
 465                 "|%s|%s|%s|%s|%s|",
 466                 uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
 467                 enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
 468                 enrollee->dev_name ? enrollee->dev_name : "",
 469                 enrollee->manufacturer ? enrollee->manufacturer : "",
 470                 enrollee->model_name ? enrollee->model_name : "",
 471                 enrollee->model_number ? enrollee->model_number : "",
 472                 enrollee->serial_number ? enrollee->serial_number : "");
 473 }
 474
 475
 476 static void wpa_supplicant_wps_event_er_enrollee_remove(
 477         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 478 {
 479         char uuid_str[100];
 480         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 481         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
 482                 uuid_str, MAC2STR(enrollee->mac_addr));
 483 }
 484
 485
 486 static void wpa_supplicant_wps_event_er_ap_settings(
 487         struct wpa_supplicant *wpa_s,
 488         struct wps_event_er_ap_settings *ap_settings)
 489 {
 490         char uuid_str[100];
 491         char key_str[65];
 492         const struct wps_credential *cred = ap_settings->cred;
 493
 494         key_str[0] = '\0';
 495         if (cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 496                 if (cred->key_len >= 8 && cred->key_len <= 64) {
 497                         os_memcpy(key_str, cred->key, cred->key_len);
 498                         key_str[cred->key_len] = '\0';
 499                 }
 500         }
 501
 502         uuid_bin2str(ap_settings->uuid, uuid_str, sizeof(uuid_str));
 503         /* Use wpa_msg_ctrl to avoid showing the key in debug log */
 504         wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_SETTINGS
 505                      "uuid=%s ssid=%s auth_type=0x%04x encr_type=0x%04x "
 506                      "key=%s",
 507                      uuid_str, wpa_ssid_txt(cred->ssid, cred->ssid_len),
 508                      cred->auth_type, cred->encr_type, key_str);
 509 }
 510
 511
 512 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 513                                      union wps_event_data *data)
 514 {
 515         struct wpa_supplicant *wpa_s = ctx;
 516         switch (event) {
 517         case WPS_EV_M2D:
 518                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 519                 break;
 520         case WPS_EV_FAIL:
 521                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 522                 break;
 523         case WPS_EV_SUCCESS:
 524                 wpa_supplicant_wps_event_success(wpa_s);
 525                 break;
 526         case WPS_EV_PWD_AUTH_FAIL:
 527                 break;
 528         case WPS_EV_PBC_OVERLAP:
 529                 break;
 530         case WPS_EV_PBC_TIMEOUT:
 531                 break;
 532         case WPS_EV_ER_AP_ADD:
 533                 wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
 534                 break;
 535         case WPS_EV_ER_AP_REMOVE:
 536                 wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
 537                 break;
 538         case WPS_EV_ER_ENROLLEE_ADD:
 539                 wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
 540                                                          &data->enrollee);
 541                 break;
 542         case WPS_EV_ER_ENROLLEE_REMOVE:
 543                 wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
 544                                                             &data->enrollee);
 545                 break;
 546         case WPS_EV_ER_AP_SETTINGS:
 547                 wpa_supplicant_wps_event_er_ap_settings(wpa_s,
 548                                                         &data->ap_settings);
 549                 break;
 550         }
 551 }
 552
 553
 554 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 555 {
 556         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 557             eap_is_wps_pin_enrollee(&ssid->eap))
 558                 return WPS_REQ_ENROLLEE;
 559         else
 560                 return WPS_REQ_REGISTRAR;
 561 }
 562
 563
 564 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 565 {
 566         int id;
 567         struct wpa_ssid *ssid, *remove_ssid = NULL;
 568
 569         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 570
 571         /* Remove any existing WPS network from configuration */
 572         ssid = wpa_s->conf->ssid;
 573         while (ssid) {
 574                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 575                         if (ssid == wpa_s->current_ssid) {
 576                                 wpa_s->current_ssid = NULL;
 577                                 if (ssid != NULL)
 578                                         wpas_notify_network_changed(wpa_s);
 579                         }
 580                         id = ssid->id;
 581                         remove_ssid = ssid;
 582                 } else
 583                         id = -1;
 584                 ssid = ssid->next;
 585                 if (id >= 0) {
 586                         wpas_notify_network_removed(wpa_s, remove_ssid);
 587                         wpa_config_remove_network(wpa_s->conf, id);
 588                 }
 589         }
 590 }
 591
 592
 593 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 594 {
 595         struct wpa_supplicant *wpa_s = eloop_ctx;
 596         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 597                 "out");
 598         wpas_clear_wps(wpa_s);
 599 }
 600
 601
 602 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 603                                               int registrar, const u8 *bssid)
 604 {
 605         struct wpa_ssid *ssid;
 606
 607         ssid = wpa_config_add_network(wpa_s->conf);
 608         if (ssid == NULL)
 609                 return NULL;
 610         wpas_notify_network_added(wpa_s, ssid);
 611         wpa_config_set_network_defaults(ssid);
 612         ssid->temporary = 1;
 613         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 614             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 615             wpa_config_set(ssid, "identity", registrar ?
 616                            "\"" WSC_ID_REGISTRAR "\"" :
 617                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 618                 wpas_notify_network_removed(wpa_s, ssid);
 619                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 620                 return NULL;
 621         }
 622
 623         if (bssid) {
 624 #ifndef CONFIG_P2P
 625                 struct wpa_bss *bss;
 626                 int count = 0;
 627 #endif /* CONFIG_P2P */
 628
 629                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 630                 ssid->bssid_set = 1;
 631
 632                 /*
 633                  * Note: With P2P, the SSID may change at the time the WPS
 634                  * provisioning is started, so better not filter the AP based
 635                  * on the current SSID in the scan results.
 636                  */
 637 #ifndef CONFIG_P2P
 638                 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 639                         if (os_memcmp(bssid, bss->bssid, ETH_ALEN) != 0)
 640                                 continue;
 641
 642                         os_free(ssid->ssid);
 643                         ssid->ssid = os_malloc(bss->ssid_len);
 644                         if (ssid->ssid == NULL)
 645                                 break;
 646                         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 647                         ssid->ssid_len = bss->ssid_len;
 648                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Picked SSID from "
 649                                           "scan results",
 650                                           ssid->ssid, ssid->ssid_len);
 651                         count++;
 652                 }
 653
 654                 if (count > 1) {
 655                         wpa_printf(MSG_DEBUG, "WPS: More than one SSID found "
 656                                    "for the AP; use wildcard");
 657                         os_free(ssid->ssid);
 658                         ssid->ssid = NULL;
 659                         ssid->ssid_len = 0;
 660                 }
 661 #endif /* CONFIG_P2P */
 662         }
 663
 664         return ssid;
 665 }
 666
 667
 668 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 669                              struct wpa_ssid *selected)
 670 {
 671         struct wpa_ssid *ssid;
 672
 673         /* Mark all other networks disabled and trigger reassociation */
 674         ssid = wpa_s->conf->ssid;
 675         while (ssid) {
 676                 int was_disabled = ssid->disabled;
 677                 ssid->disabled = ssid != selected;
 678                 if (was_disabled != ssid->disabled)
 679                         wpas_notify_network_enabled_changed(wpa_s, ssid);
 680                 ssid = ssid->next;
 681         }
 682         wpa_s->disconnected = 0;
 683         wpa_s->reassociate = 1;
 684         wpa_s->scan_runs = 0;
 685         wpa_s->wps_success = 0;
 686         wpa_s->blacklist_cleared = 0;
 687         wpa_supplicant_req_scan(wpa_s, 0, 0);
 688 }
 689
 690
 691 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid,
 692                        int p2p_group)
 693 {
 694         struct wpa_ssid *ssid;
 695         wpas_clear_wps(wpa_s);
 696         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 697         if (ssid == NULL)
 698                 return -1;
 699         ssid->temporary = 1;
 700         ssid->p2p_group = p2p_group;
 701 #ifdef CONFIG_P2P
 702         if (p2p_group && wpa_s->go_params && wpa_s->go_params->ssid_len) {
 703                 ssid->ssid = os_zalloc(wpa_s->go_params->ssid_len + 1);
 704                 if (ssid->ssid) {
 705                         ssid->ssid_len = wpa_s->go_params->ssid_len;
 706                         os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
 707                                   ssid->ssid_len);
 708                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
 709                                           "SSID", ssid->ssid, ssid->ssid_len);
 710                 }
 711         }
 712 #endif /* CONFIG_P2P */
 713         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 714         if (wpa_s->wps_fragment_size)
 715                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 716         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 717                                wpa_s, NULL);
 718         wpas_wps_reassoc(wpa_s, ssid);
 719         return 0;
 720 }
 721
 722
 723 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 724                        const char *pin, int p2p_group, u16 dev_pw_id)
 725 {
 726         struct wpa_ssid *ssid;
 727         char val[128];
 728         unsigned int rpin = 0;
 729
 730         wpas_clear_wps(wpa_s);
 731         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 732         if (ssid == NULL)
 733                 return -1;
 734         ssid->temporary = 1;
 735         ssid->p2p_group = p2p_group;
 736 #ifdef CONFIG_P2P
 737         if (p2p_group && wpa_s->go_params && wpa_s->go_params->ssid_len) {
 738                 ssid->ssid = os_zalloc(wpa_s->go_params->ssid_len + 1);
 739                 if (ssid->ssid) {
 740                         ssid->ssid_len = wpa_s->go_params->ssid_len;
 741                         os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
 742                                   ssid->ssid_len);
 743                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
 744                                           "SSID", ssid->ssid, ssid->ssid_len);
 745                 }
 746         }
 747 #endif /* CONFIG_P2P */
 748         if (pin)
 749                 os_snprintf(val, sizeof(val), "\"pin=%s dev_pw_id=%u\"",
 750                             pin, dev_pw_id);
 751         else {
 752                 rpin = wps_generate_pin();
 753                 os_snprintf(val, sizeof(val), "\"pin=%08d dev_pw_id=%u\"",
 754                             rpin, dev_pw_id);
 755         }
 756         wpa_config_set(ssid, "phase1", val, 0);
 757         if (wpa_s->wps_fragment_size)
 758                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 759         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 760                                wpa_s, NULL);
 761         wpas_wps_reassoc(wpa_s, ssid);
 762         return rpin;
 763 }
 764
 765
 766 /* Cancel the wps pbc/pin requests */
 767 int wpas_wps_cancel(struct wpa_supplicant *wpa_s)
 768 {
 769 #ifdef CONFIG_AP
 770         if (wpa_s->ap_iface) {
 771                 wpa_printf(MSG_DEBUG, "WPS: Cancelling in AP mode");
 772                 return wpa_supplicant_ap_wps_cancel(wpa_s);
 773         }
 774 #endif /* CONFIG_AP */
 775
 776         if (wpa_s->wpa_state == WPA_SCANNING) {
 777                 wpa_printf(MSG_DEBUG, "WPS: Cancel operation - cancel scan");
 778                 wpa_supplicant_cancel_scan(wpa_s);
 779                 wpas_clear_wps(wpa_s);
 780         } else if (wpa_s->wpa_state >= WPA_ASSOCIATED) {
 781                 wpa_printf(MSG_DEBUG, "WPS: Cancel operation - "
 782                            "deauthenticate");
 783                 wpa_supplicant_deauthenticate(wpa_s,
 784                                               WLAN_REASON_DEAUTH_LEAVING);
 785                 wpas_clear_wps(wpa_s);
 786         }
 787
 788         return 0;
 789 }
 790
 791
 792 #ifdef CONFIG_WPS_OOB
 793 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 794                        char *path, char *method, char *name)
 795 {
 796         struct wps_context *wps = wpa_s->wps;
 797         struct oob_device_data *oob_dev;
 798
 799         oob_dev = wps_get_oob_device(device_type);
 800         if (oob_dev == NULL)
 801                 return -1;
 802         oob_dev->device_path = path;
 803         oob_dev->device_name = name;
 804         wps->oob_conf.oob_method = wps_get_oob_method(method);
 805
 806         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 807                 /*
 808                  * Use pre-configured DH keys in order to be able to write the
 809                  * key hash into the OOB file.
 810                  */
 811                 wpabuf_free(wps->dh_pubkey);
 812                 wpabuf_free(wps->dh_privkey);
 813                 wps->dh_privkey = NULL;
 814                 wps->dh_pubkey = NULL;
 815                 dh5_free(wps->dh_ctx);
 816                 wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
 817                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 818                 if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
 819                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 820                                    "Diffie-Hellman handshake");
 821                         return -1;
 822                 }
 823         }
 824
 825         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 826                 wpas_clear_wps(wpa_s);
 827
 828         if (wps_process_oob(wps, oob_dev, 0) < 0)
 829                 return -1;
 830
 831         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 832              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 833             wpas_wps_start_pin(wpa_s, NULL,
 834                                wpabuf_head(wps->oob_conf.dev_password), 0,
 835                                DEV_PW_DEFAULT) < 0)
 836                         return -1;
 837
 838         return 0;
 839 }
 840 #endif /* CONFIG_WPS_OOB */
 841
 842
 843 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 844                        const char *pin, struct wps_new_ap_settings *settings)
 845 {
 846         struct wpa_ssid *ssid;
 847         char val[200];
 848         char *pos, *end;
 849         int res;
 850
 851         if (!pin)
 852                 return -1;
 853         wpas_clear_wps(wpa_s);
 854         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 855         if (ssid == NULL)
 856                 return -1;
 857         ssid->temporary = 1;
 858         pos = val;
 859         end = pos + sizeof(val);
 860         res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
 861         if (res < 0 || res >= end - pos)
 862                 return -1;
 863         pos += res;
 864         if (settings) {
 865                 res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
 866                                   "new_encr=%s new_key=%s",
 867                                   settings->ssid_hex, settings->auth,
 868                                   settings->encr, settings->key_hex);
 869                 if (res < 0 || res >= end - pos)
 870                         return -1;
 871                 pos += res;
 872         }
 873         res = os_snprintf(pos, end - pos, "\"");
 874         if (res < 0 || res >= end - pos)
 875                 return -1;
 876         wpa_config_set(ssid, "phase1", val, 0);
 877         if (wpa_s->wps_fragment_size)
 878                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 879         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 880                                wpa_s, NULL);
 881         wpas_wps_reassoc(wpa_s, ssid);
 882         return 0;
 883 }
 884
 885
 886 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 887                                size_t psk_len)
 888 {
 889         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 890                    "STA " MACSTR, MAC2STR(mac_addr));
 891         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 892
 893         /* TODO */
 894
 895         return 0;
 896 }
 897
 898
 899 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 900                                    const struct wps_device_data *dev)
 901 {
 902         char uuid[40], txt[400];
 903         int len;
 904         char devtype[WPS_DEV_TYPE_BUFSIZE];
 905         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 906                 return;
 907         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 908         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 909                           " [%s|%s|%s|%s|%s|%s]",
 910                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 911                           dev->manufacturer, dev->model_name,
 912                           dev->model_number, dev->serial_number,
 913                           wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 914                                                sizeof(devtype)));
 915         if (len > 0 && len < (int) sizeof(txt))
 916                 wpa_printf(MSG_INFO, "%s", txt);
 917 }
 918
 919
 920 static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
 921                                     u16 sel_reg_config_methods)
 922 {
 923 #ifdef CONFIG_WPS_ER
 924         struct wpa_supplicant *wpa_s = ctx;
 925
 926         if (wpa_s->wps_er == NULL)
 927                 return;
 928         wpa_printf(MSG_DEBUG, "WPS ER: SetSelectedRegistrar - sel_reg=%d "
 929                    "dev_password_id=%u sel_reg_config_methods=0x%x",
 930                    sel_reg, dev_passwd_id, sel_reg_config_methods);
 931         wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
 932                            sel_reg_config_methods);
 933 #endif /* CONFIG_WPS_ER */
 934 }
 935
 936
 937 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 938 {
 939         struct wps_context *wps;
 940         struct wps_registrar_config rcfg;
 941
 942         wps = os_zalloc(sizeof(*wps));
 943         if (wps == NULL)
 944                 return -1;
 945
 946         wps->cred_cb = wpa_supplicant_wps_cred;
 947         wps->event_cb = wpa_supplicant_wps_event;
 948         wps->cb_ctx = wpa_s;
 949
 950         wps->dev.device_name = wpa_s->conf->device_name;
 951         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 952         wps->dev.model_name = wpa_s->conf->model_name;
 953         wps->dev.model_number = wpa_s->conf->model_number;
 954         wps->dev.serial_number = wpa_s->conf->serial_number;
 955         wps->config_methods =
 956                 wps_config_methods_str2bin(wpa_s->conf->config_methods);
 957         if ((wps->config_methods & (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
 958             (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
 959                 wpa_printf(MSG_ERROR, "WPS: Both Label and Display config "
 960                            "methods are not allowed at the same time");
 961                 os_free(wps);
 962                 return -1;
 963         }
 964         if (wpa_s->conf->device_type &&
 965             wps_dev_type_str2bin(wpa_s->conf->device_type,
 966                                  wps->dev.pri_dev_type) < 0) {
 967                 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 968                 os_free(wps);
 969                 return -1;
 970         }
 971         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 972         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 973         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 974         if (is_nil_uuid(wpa_s->conf->uuid)) {
 975                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 976                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 977                             wps->uuid, WPS_UUID_LEN);
 978         } else
 979                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 980
 981         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 982         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 983
 984         os_memset(&rcfg, 0, sizeof(rcfg));
 985         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 986         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 987         rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
 988         rcfg.cb_ctx = wpa_s;
 989
 990         wps->registrar = wps_registrar_init(wps, &rcfg);
 991         if (wps->registrar == NULL) {
 992                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 993                 os_free(wps);
 994                 return -1;
 995         }
 996
 997         wpa_s->wps = wps;
 998
 999         return 0;
1000 }
1001
1002
1003 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
1004 {
1005         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
1006
1007         if (wpa_s->wps == NULL)
1008                 return;
1009
1010 #ifdef CONFIG_WPS_ER
1011         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
1012         wpa_s->wps_er = NULL;
1013 #endif /* CONFIG_WPS_ER */
1014
1015         wps_registrar_deinit(wpa_s->wps->registrar);
1016         wpabuf_free(wpa_s->wps->dh_pubkey);
1017         wpabuf_free(wpa_s->wps->dh_privkey);
1018         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
1019         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
1020         os_free(wpa_s->wps->network_key);
1021         os_free(wpa_s->wps);
1022         wpa_s->wps = NULL;
1023 }
1024
1025
1026 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
1027                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
1028 {
1029         struct wpabuf *wps_ie;
1030
1031         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
1032                 return -1;
1033
1034         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1035         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
1036                 if (!wps_ie) {
1037                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
1038                         return 0;
1039                 }
1040
1041                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
1042                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
1043                                    "without active PBC Registrar");
1044                         wpabuf_free(wps_ie);
1045                         return 0;
1046                 }
1047
1048                 /* TODO: overlap detection */
1049                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
1050                            "(Active PBC)");
1051                 wpabuf_free(wps_ie);
1052                 return 1;
1053         }
1054
1055         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
1056                 if (!wps_ie) {
1057                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
1058                         return 0;
1059                 }
1060
1061                 /*
1062                  * Start with WPS APs that advertise our address as an
1063                  * authorized MAC (v2.0) or active PIN Registrar (v1.0) and
1064                  * allow any WPS AP after couple of scans since some APs do not
1065                  * set Selected Registrar attribute properly when using
1066                  * external Registrar.
1067                  */
1068                 if (!wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1)) {
1069                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
1070                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
1071                                            "without active PIN Registrar");
1072                                 wpabuf_free(wps_ie);
1073                                 return 0;
1074                         }
1075                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1076                 } else {
1077                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
1078                                    "(Authorized MAC or Active PIN)");
1079                 }
1080                 wpabuf_free(wps_ie);
1081                 return 1;
1082         }
1083
1084         if (wps_ie) {
1085                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1086                 wpabuf_free(wps_ie);
1087                 return 1;
1088         }
1089
1090         return -1;
1091 }
1092
1093
1094 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
1095                               struct wpa_ssid *ssid,
1096                               struct wpa_scan_res *bss)
1097 {
1098         struct wpabuf *wps_ie = NULL;
1099         int ret = 0;
1100
1101         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
1102                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1103                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
1104                         /* allow wildcard SSID for WPS PBC */
1105                         ret = 1;
1106                 }
1107         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
1108                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1109                 if (wps_ie &&
1110                     (wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1) ||
1111                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
1112                         /* allow wildcard SSID for WPS PIN */
1113                         ret = 1;
1114                 }
1115         }
1116
1117         if (!ret && ssid->bssid_set &&
1118             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
1119                 /* allow wildcard SSID due to hardcoded BSSID match */
1120                 ret = 1;
1121         }
1122
1123 #ifdef CONFIG_WPS_STRICT
1124         if (wps_ie) {
1125                 if (wps_validate_beacon_probe_resp(wps_ie, bss->beacon_ie_len >
1126                                                    0, bss->bssid) < 0)
1127                         ret = 0;
1128                 if (bss->beacon_ie_len) {
1129                         struct wpabuf *bcn_wps;
1130                         bcn_wps = wpa_scan_get_vendor_ie_multi_beacon(
1131                                 bss, WPS_IE_VENDOR_TYPE);
1132                         if (bcn_wps == NULL) {
1133                                 wpa_printf(MSG_DEBUG, "WPS: Mandatory WPS IE "
1134                                            "missing from AP Beacon");
1135                                 ret = 0;
1136                         } else {
1137                                 if (wps_validate_beacon(wps_ie) < 0)
1138                                         ret = 0;
1139                                 wpabuf_free(bcn_wps);
1140                         }
1141                 }
1142         }
1143 #endif /* CONFIG_WPS_STRICT */
1144
1145         wpabuf_free(wps_ie);
1146
1147         return ret;
1148 }
1149
1150
1151 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
1152                               struct wpa_bss *selected, struct wpa_ssid *ssid)
1153 {
1154         const u8 *sel_uuid, *uuid;
1155         struct wpabuf *wps_ie;
1156         int ret = 0;
1157         struct wpa_bss *bss;
1158
1159         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
1160                 return 0;
1161
1162         wpa_printf(MSG_DEBUG, "WPS: Check whether PBC session overlap is "
1163                    "present in scan results; selected BSSID " MACSTR,
1164                    MAC2STR(selected->bssid));
1165
1166         /* Make sure that only one AP is in active PBC mode */
1167         wps_ie = wpa_bss_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
1168         if (wps_ie) {
1169                 sel_uuid = wps_get_uuid_e(wps_ie);
1170                 wpa_hexdump(MSG_DEBUG, "WPS: UUID of the selected BSS",
1171                             sel_uuid, UUID_LEN);
1172         } else {
1173                 wpa_printf(MSG_DEBUG, "WPS: Selected BSS does not include "
1174                            "WPS IE?!");
1175                 sel_uuid = NULL;
1176         }
1177
1178         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1179                 struct wpabuf *ie;
1180                 if (bss == selected)
1181                         continue;
1182                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1183                 if (!ie)
1184                         continue;
1185                 if (!wps_is_selected_pbc_registrar(ie)) {
1186                         wpabuf_free(ie);
1187                         continue;
1188                 }
1189                 wpa_printf(MSG_DEBUG, "WPS: Another BSS in active PBC mode: "
1190                            MACSTR, MAC2STR(bss->bssid));
1191                 uuid = wps_get_uuid_e(ie);
1192                 wpa_hexdump(MSG_DEBUG, "WPS: UUID of the other BSS",
1193                             uuid, UUID_LEN);
1194                 if (sel_uuid == NULL || uuid == NULL ||
1195                     os_memcmp(sel_uuid, uuid, UUID_LEN) != 0) {
1196                         ret = 1; /* PBC overlap */
1197                         wpa_msg(wpa_s, MSG_INFO, "WPS: PBC overlap detected: "
1198                                 MACSTR " and " MACSTR,
1199                                 MAC2STR(selected->bssid),
1200                                 MAC2STR(bss->bssid));
1201                         wpabuf_free(ie);
1202                         break;
1203                 }
1204
1205                 /* TODO: verify that this is reasonable dual-band situation */
1206
1207                 wpabuf_free(ie);
1208         }
1209
1210         wpabuf_free(wps_ie);
1211
1212         return ret;
1213 }
1214
1215
1216 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
1217 {
1218         struct wpa_bss *bss;
1219
1220         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
1221                 return;
1222
1223         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1224                 struct wpabuf *ie;
1225                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1226                 if (!ie)
1227                         continue;
1228                 if (wps_is_selected_pbc_registrar(ie))
1229                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1230                                      WPS_EVENT_AP_AVAILABLE_PBC);
1231                 else if (wps_is_addr_authorized(ie, wpa_s->own_addr, 0))
1232                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1233                                      WPS_EVENT_AP_AVAILABLE_AUTH);
1234                 else if (wps_is_selected_pin_registrar(ie))
1235                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1236                                      WPS_EVENT_AP_AVAILABLE_PIN);
1237                 else
1238                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1239                                      WPS_EVENT_AP_AVAILABLE);
1240                 wpabuf_free(ie);
1241                 break;
1242         }
1243 }
1244
1245
1246 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
1247 {
1248         struct wpa_ssid *ssid;
1249
1250         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1251                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
1252                         return 1;
1253         }
1254
1255         return 0;
1256 }
1257
1258
1259 int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
1260                               char *end)
1261 {
1262         struct wpabuf *wps_ie;
1263         int ret;
1264
1265         wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
1266         if (wps_ie == NULL)
1267                 return 0;
1268
1269         ret = wps_attr_text(wps_ie, buf, end);
1270         wpabuf_free(wps_ie);
1271         return ret;
1272 }
1273
1274
1275 int wpas_wps_er_start(struct wpa_supplicant *wpa_s, const char *filter)
1276 {
1277 #ifdef CONFIG_WPS_ER
1278         if (wpa_s->wps_er) {
1279                 wps_er_refresh(wpa_s->wps_er);
1280                 return 0;
1281         }
1282         wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname, filter);
1283         if (wpa_s->wps_er == NULL)
1284                 return -1;
1285         return 0;
1286 #else /* CONFIG_WPS_ER */
1287         return 0;
1288 #endif /* CONFIG_WPS_ER */
1289 }
1290
1291
1292 int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
1293 {
1294 #ifdef CONFIG_WPS_ER
1295         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
1296         wpa_s->wps_er = NULL;
1297 #endif /* CONFIG_WPS_ER */
1298         return 0;
1299 }
1300
1301
1302 #ifdef CONFIG_WPS_ER
1303 int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const u8 *addr,
1304                         const char *uuid, const char *pin)
1305 {
1306         u8 u[UUID_LEN];
1307         int any = 0;
1308
1309         if (os_strcmp(uuid, "any") == 0)
1310                 any = 1;
1311         else if (uuid_str2bin(uuid, u))
1312                 return -1;
1313         return wps_registrar_add_pin(wpa_s->wps->registrar, addr,
1314                                      any ? NULL : u,
1315                                      (const u8 *) pin, os_strlen(pin), 300);
1316 }
1317
1318
1319 int wpas_wps_er_pbc(struct wpa_supplicant *wpa_s, const char *uuid)
1320 {
1321         u8 u[UUID_LEN];
1322
1323         if (uuid_str2bin(uuid, u))
1324                 return -1;
1325         return wps_er_pbc(wpa_s->wps_er, u);
1326 }
1327
1328
1329 int wpas_wps_er_learn(struct wpa_supplicant *wpa_s, const char *uuid,
1330                       const char *pin)
1331 {
1332         u8 u[UUID_LEN];
1333
1334         if (uuid_str2bin(uuid, u))
1335                 return -1;
1336         return wps_er_learn(wpa_s->wps_er, u, (const u8 *) pin,
1337                             os_strlen(pin));
1338 }
1339
1340
1341 int wpas_wps_er_config(struct wpa_supplicant *wpa_s, const char *uuid,
1342                        const char *pin, struct wps_new_ap_settings *settings)
1343 {
1344         u8 u[UUID_LEN];
1345         struct wps_credential cred;
1346         size_t len;
1347
1348         if (uuid_str2bin(uuid, u))
1349                 return -1;
1350         if (settings->ssid_hex == NULL || settings->auth == NULL ||
1351             settings->encr == NULL || settings->key_hex == NULL)
1352                 return -1;
1353
1354         os_memset(&cred, 0, sizeof(cred));
1355         len = os_strlen(settings->ssid_hex);
1356         if ((len & 1) || len > 2 * sizeof(cred.ssid) ||
1357             hexstr2bin(settings->ssid_hex, cred.ssid, len / 2))
1358                 return -1;
1359         cred.ssid_len = len / 2;
1360
1361         len = os_strlen(settings->key_hex);
1362         if ((len & 1) || len > 2 * sizeof(cred.key) ||
1363             hexstr2bin(settings->key_hex, cred.key, len / 2))
1364                 return -1;
1365         cred.key_len = len / 2;
1366
1367         if (os_strcmp(settings->auth, "OPEN") == 0)
1368                 cred.auth_type = WPS_AUTH_OPEN;
1369         else if (os_strcmp(settings->auth, "WPAPSK") == 0)
1370                 cred.auth_type = WPS_AUTH_WPAPSK;
1371         else if (os_strcmp(settings->auth, "WPA2PSK") == 0)
1372                 cred.auth_type = WPS_AUTH_WPA2PSK;
1373         else
1374                 return -1;
1375
1376         if (os_strcmp(settings->encr, "NONE") == 0)
1377                 cred.encr_type = WPS_ENCR_NONE;
1378         else if (os_strcmp(settings->encr, "WEP") == 0)
1379                 cred.encr_type = WPS_ENCR_WEP;
1380         else if (os_strcmp(settings->encr, "TKIP") == 0)
1381                 cred.encr_type = WPS_ENCR_TKIP;
1382         else if (os_strcmp(settings->encr, "CCMP") == 0)
1383                 cred.encr_type = WPS_ENCR_AES;
1384         else
1385                 return -1;
1386
1387         return wps_er_config(wpa_s->wps_er, u, (const u8 *) pin,
1388                              os_strlen(pin), &cred);
1389 }
1390
1391
1392 static void wpas_wps_terminate_cb(void *ctx)
1393 {
1394         wpa_printf(MSG_DEBUG, "WPS ER: Terminated");
1395         eloop_terminate();
1396 }
1397 #endif /* CONFIG_WPS_ER */
1398
1399
1400 int wpas_wps_terminate_pending(struct wpa_supplicant *wpa_s)
1401 {
1402 #ifdef CONFIG_WPS_ER
1403         if (wpa_s->wps_er) {
1404                 wps_er_deinit(wpa_s->wps_er, wpas_wps_terminate_cb, wpa_s);
1405                 wpa_s->wps_er = NULL;
1406                 return 1;
1407         }
1408 #endif /* CONFIG_WPS_ER */
1409         return 0;
1410 }
1411
1412
1413 int wpas_wps_in_progress(struct wpa_supplicant *wpa_s)
1414 {
1415         struct wpa_ssid *ssid;
1416
1417         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1418                 if (!ssid->disabled && ssid->key_mgmt == WPA_KEY_MGMT_WPS)
1419                         return 1;
1420         }
1421
1422         return 0;
1423 }
1424
1425
1426 void wpas_wps_update_config(struct wpa_supplicant *wpa_s)
1427 {
1428         struct wps_context *wps = wpa_s->wps;
1429
1430         if (wps == NULL)
1431                 return;
1432
1433         if (wpa_s->conf->changed_parameters & CFG_CHANGED_CONFIG_METHODS) {
1434                 wps->config_methods = wps_config_methods_str2bin(
1435                         wpa_s->conf->config_methods);
1436                 if ((wps->config_methods &
1437                      (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
1438                     (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
1439                         wpa_printf(MSG_ERROR, "WPS: Both Label and Display "
1440                                    "config methods are not allowed at the "
1441                                    "same time");
1442                         wps->config_methods &= ~WPS_CONFIG_LABEL;
1443                 }
1444         }
1445
1446         if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_TYPE) {
1447                 if (wpa_s->conf->device_type &&
1448                     wps_dev_type_str2bin(wpa_s->conf->device_type,
1449                                          wps->dev.pri_dev_type) < 0)
1450                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
1451         }
1452
1453         if (wpa_s->conf->changed_parameters & CFG_CHANGED_OS_VERSION)
1454                 wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
1455
1456         if (wpa_s->conf->changed_parameters & CFG_CHANGED_UUID) {
1457                 if (is_nil_uuid(wpa_s->conf->uuid)) {
1458                         uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
1459                         wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
1460                                     "address", wps->uuid, WPS_UUID_LEN);
1461                 } else
1462                         os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
1463         }
1464
1465         if (wpa_s->conf->changed_parameters &
1466             (CFG_CHANGED_DEVICE_NAME | CFG_CHANGED_WPS_STRING)) {
1467                 /* Update pointers to make sure they refer current values */
1468                 wps->dev.device_name = wpa_s->conf->device_name;
1469                 wps->dev.manufacturer = wpa_s->conf->manufacturer;
1470                 wps->dev.model_name = wpa_s->conf->model_name;
1471                 wps->dev.model_number = wpa_s->conf->model_number;
1472                 wps->dev.serial_number = wpa_s->conf->serial_number;
1473         }
1474 }