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", fail->msg);
 395         wpas_clear_wps(wpa_s);
 396         wpas_notify_wps_event_fail(wpa_s, fail);
 397 }
 398
 399
 400 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
 401 {
 402         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
 403         wpa_s->wps_success = 1;
 404         wpas_notify_wps_event_success(wpa_s);
 405 #ifdef CONFIG_P2P
 406         wpas_p2p_wps_success(wpa_s, wpa_s->bssid, 0);
 407 #endif /* CONFIG_P2P */
 408 }
 409
 410
 411 static void wpa_supplicant_wps_event_er_ap_add(struct wpa_supplicant *wpa_s,
 412                                                struct wps_event_er_ap *ap)
 413 {
 414         char uuid_str[100];
 415         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 416
 417         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 418         if (ap->pri_dev_type)
 419                 wps_dev_type_bin2str(ap->pri_dev_type, dev_type,
 420                                      sizeof(dev_type));
 421         else
 422                 dev_type[0] = '\0';
 423
 424         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s " MACSTR
 425                 " pri_dev_type=%s wps_state=%d |%s|%s|%s|%s|%s|%s|",
 426                 uuid_str, MAC2STR(ap->mac_addr), dev_type, ap->wps_state,
 427                 ap->friendly_name ? ap->friendly_name : "",
 428                 ap->manufacturer ? ap->manufacturer : "",
 429                 ap->model_description ? ap->model_description : "",
 430                 ap->model_name ? ap->model_name : "",
 431                 ap->manufacturer_url ? ap->manufacturer_url : "",
 432                 ap->model_url ? ap->model_url : "");
 433 }
 434
 435
 436 static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
 437                                                   struct wps_event_er_ap *ap)
 438 {
 439         char uuid_str[100];
 440         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 441         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
 442 }
 443
 444
 445 static void wpa_supplicant_wps_event_er_enrollee_add(
 446         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 447 {
 448         char uuid_str[100];
 449         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 450
 451         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 452         if (enrollee->pri_dev_type)
 453                 wps_dev_type_bin2str(enrollee->pri_dev_type, dev_type,
 454                                      sizeof(dev_type));
 455         else
 456                 dev_type[0] = '\0';
 457
 458         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
 459                 " M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
 460                 "|%s|%s|%s|%s|%s|",
 461                 uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
 462                 enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
 463                 enrollee->dev_name ? enrollee->dev_name : "",
 464                 enrollee->manufacturer ? enrollee->manufacturer : "",
 465                 enrollee->model_name ? enrollee->model_name : "",
 466                 enrollee->model_number ? enrollee->model_number : "",
 467                 enrollee->serial_number ? enrollee->serial_number : "");
 468 }
 469
 470
 471 static void wpa_supplicant_wps_event_er_enrollee_remove(
 472         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 473 {
 474         char uuid_str[100];
 475         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 476         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
 477                 uuid_str, MAC2STR(enrollee->mac_addr));
 478 }
 479
 480
 481 static void wpa_supplicant_wps_event_er_ap_settings(
 482         struct wpa_supplicant *wpa_s,
 483         struct wps_event_er_ap_settings *ap_settings)
 484 {
 485         char uuid_str[100];
 486         char key_str[65];
 487         const struct wps_credential *cred = ap_settings->cred;
 488
 489         key_str[0] = '\0';
 490         if (cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 491                 if (cred->key_len >= 8 && cred->key_len <= 64) {
 492                         os_memcpy(key_str, cred->key, cred->key_len);
 493                         key_str[cred->key_len] = '\0';
 494                 }
 495         }
 496
 497         uuid_bin2str(ap_settings->uuid, uuid_str, sizeof(uuid_str));
 498         /* Use wpa_msg_ctrl to avoid showing the key in debug log */
 499         wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_SETTINGS
 500                      "uuid=%s ssid=%s auth_type=0x%04x encr_type=0x%04x "
 501                      "key=%s",
 502                      uuid_str, wpa_ssid_txt(cred->ssid, cred->ssid_len),
 503                      cred->auth_type, cred->encr_type, key_str);
 504 }
 505
 506
 507 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 508                                      union wps_event_data *data)
 509 {
 510         struct wpa_supplicant *wpa_s = ctx;
 511         switch (event) {
 512         case WPS_EV_M2D:
 513                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 514                 break;
 515         case WPS_EV_FAIL:
 516                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 517                 break;
 518         case WPS_EV_SUCCESS:
 519                 wpa_supplicant_wps_event_success(wpa_s);
 520                 break;
 521         case WPS_EV_PWD_AUTH_FAIL:
 522                 break;
 523         case WPS_EV_PBC_OVERLAP:
 524                 break;
 525         case WPS_EV_PBC_TIMEOUT:
 526                 break;
 527         case WPS_EV_ER_AP_ADD:
 528                 wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
 529                 break;
 530         case WPS_EV_ER_AP_REMOVE:
 531                 wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
 532                 break;
 533         case WPS_EV_ER_ENROLLEE_ADD:
 534                 wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
 535                                                          &data->enrollee);
 536                 break;
 537         case WPS_EV_ER_ENROLLEE_REMOVE:
 538                 wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
 539                                                             &data->enrollee);
 540                 break;
 541         case WPS_EV_ER_AP_SETTINGS:
 542                 wpa_supplicant_wps_event_er_ap_settings(wpa_s,
 543                                                         &data->ap_settings);
 544                 break;
 545         }
 546 }
 547
 548
 549 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 550 {
 551         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 552             eap_is_wps_pin_enrollee(&ssid->eap))
 553                 return WPS_REQ_ENROLLEE;
 554         else
 555                 return WPS_REQ_REGISTRAR;
 556 }
 557
 558
 559 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 560 {
 561         int id;
 562         struct wpa_ssid *ssid, *remove_ssid = NULL;
 563
 564         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 565
 566         /* Remove any existing WPS network from configuration */
 567         ssid = wpa_s->conf->ssid;
 568         while (ssid) {
 569                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 570                         if (ssid == wpa_s->current_ssid) {
 571                                 wpa_s->current_ssid = NULL;
 572                                 if (ssid != NULL)
 573                                         wpas_notify_network_changed(wpa_s);
 574                         }
 575                         id = ssid->id;
 576                         remove_ssid = ssid;
 577                 } else
 578                         id = -1;
 579                 ssid = ssid->next;
 580                 if (id >= 0) {
 581                         wpas_notify_network_removed(wpa_s, remove_ssid);
 582                         wpa_config_remove_network(wpa_s->conf, id);
 583                 }
 584         }
 585 }
 586
 587
 588 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 589 {
 590         struct wpa_supplicant *wpa_s = eloop_ctx;
 591         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 592                 "out");
 593         wpas_clear_wps(wpa_s);
 594 }
 595
 596
 597 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 598                                               int registrar, const u8 *bssid)
 599 {
 600         struct wpa_ssid *ssid;
 601
 602         ssid = wpa_config_add_network(wpa_s->conf);
 603         if (ssid == NULL)
 604                 return NULL;
 605         wpas_notify_network_added(wpa_s, ssid);
 606         wpa_config_set_network_defaults(ssid);
 607         ssid->temporary = 1;
 608         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 609             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 610             wpa_config_set(ssid, "identity", registrar ?
 611                            "\"" WSC_ID_REGISTRAR "\"" :
 612                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 613                 wpas_notify_network_removed(wpa_s, ssid);
 614                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 615                 return NULL;
 616         }
 617
 618         if (bssid) {
 619 #ifndef CONFIG_P2P
 620                 struct wpa_bss *bss;
 621                 int count = 0;
 622 #endif /* CONFIG_P2P */
 623
 624                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 625                 ssid->bssid_set = 1;
 626
 627                 /*
 628                  * Note: With P2P, the SSID may change at the time the WPS
 629                  * provisioning is started, so better not filter the AP based
 630                  * on the current SSID in the scan results.
 631                  */
 632 #ifndef CONFIG_P2P
 633                 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 634                         if (os_memcmp(bssid, bss->bssid, ETH_ALEN) != 0)
 635                                 continue;
 636
 637                         os_free(ssid->ssid);
 638                         ssid->ssid = os_malloc(bss->ssid_len);
 639                         if (ssid->ssid == NULL)
 640                                 break;
 641                         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 642                         ssid->ssid_len = bss->ssid_len;
 643                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Picked SSID from "
 644                                           "scan results",
 645                                           ssid->ssid, ssid->ssid_len);
 646                         count++;
 647                 }
 648
 649                 if (count > 1) {
 650                         wpa_printf(MSG_DEBUG, "WPS: More than one SSID found "
 651                                    "for the AP; use wildcard");
 652                         os_free(ssid->ssid);
 653                         ssid->ssid = NULL;
 654                         ssid->ssid_len = 0;
 655                 }
 656 #endif /* CONFIG_P2P */
 657         }
 658
 659         return ssid;
 660 }
 661
 662
 663 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 664                              struct wpa_ssid *selected)
 665 {
 666         struct wpa_ssid *ssid;
 667
 668         /* Mark all other networks disabled and trigger reassociation */
 669         ssid = wpa_s->conf->ssid;
 670         while (ssid) {
 671                 int was_disabled = ssid->disabled;
 672                 ssid->disabled = ssid != selected;
 673                 if (was_disabled != ssid->disabled)
 674                         wpas_notify_network_enabled_changed(wpa_s, ssid);
 675                 ssid = ssid->next;
 676         }
 677         wpa_s->disconnected = 0;
 678         wpa_s->reassociate = 1;
 679         wpa_s->scan_runs = 0;
 680         wpa_s->wps_success = 0;
 681         wpa_s->blacklist_cleared = 0;
 682         wpa_supplicant_req_scan(wpa_s, 0, 0);
 683 }
 684
 685
 686 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid,
 687                        int p2p_group)
 688 {
 689         struct wpa_ssid *ssid;
 690         wpas_clear_wps(wpa_s);
 691         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 692         if (ssid == NULL)
 693                 return -1;
 694         ssid->temporary = 1;
 695         ssid->p2p_group = p2p_group;
 696 #ifdef CONFIG_P2P
 697         if (p2p_group && wpa_s->go_params && wpa_s->go_params->ssid_len) {
 698                 ssid->ssid = os_zalloc(wpa_s->go_params->ssid_len + 1);
 699                 if (ssid->ssid) {
 700                         ssid->ssid_len = wpa_s->go_params->ssid_len;
 701                         os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
 702                                   ssid->ssid_len);
 703                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
 704                                           "SSID", ssid->ssid, ssid->ssid_len);
 705                 }
 706         }
 707 #endif /* CONFIG_P2P */
 708         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 709         if (wpa_s->wps_fragment_size)
 710                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 711         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 712                                wpa_s, NULL);
 713         wpas_wps_reassoc(wpa_s, ssid);
 714         return 0;
 715 }
 716
 717
 718 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 719                        const char *pin, int p2p_group, u16 dev_pw_id)
 720 {
 721         struct wpa_ssid *ssid;
 722         char val[128];
 723         unsigned int rpin = 0;
 724
 725         wpas_clear_wps(wpa_s);
 726         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 727         if (ssid == NULL)
 728                 return -1;
 729         ssid->temporary = 1;
 730         ssid->p2p_group = p2p_group;
 731 #ifdef CONFIG_P2P
 732         if (p2p_group && wpa_s->go_params && wpa_s->go_params->ssid_len) {
 733                 ssid->ssid = os_zalloc(wpa_s->go_params->ssid_len + 1);
 734                 if (ssid->ssid) {
 735                         ssid->ssid_len = wpa_s->go_params->ssid_len;
 736                         os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
 737                                   ssid->ssid_len);
 738                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
 739                                           "SSID", ssid->ssid, ssid->ssid_len);
 740                 }
 741         }
 742 #endif /* CONFIG_P2P */
 743         if (pin)
 744                 os_snprintf(val, sizeof(val), "\"pin=%s dev_pw_id=%u\"",
 745                             pin, dev_pw_id);
 746         else {
 747                 rpin = wps_generate_pin();
 748                 os_snprintf(val, sizeof(val), "\"pin=%08d dev_pw_id=%u\"",
 749                             rpin, dev_pw_id);
 750         }
 751         wpa_config_set(ssid, "phase1", val, 0);
 752         if (wpa_s->wps_fragment_size)
 753                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 754         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 755                                wpa_s, NULL);
 756         wpas_wps_reassoc(wpa_s, ssid);
 757         return rpin;
 758 }
 759
 760
 761 /* Cancel the wps pbc/pin requests */
 762 int wpas_wps_cancel(struct wpa_supplicant *wpa_s)
 763 {
 764 #ifdef CONFIG_AP
 765         if (wpa_s->ap_iface) {
 766                 wpa_printf(MSG_DEBUG, "WPS: Cancelling in AP mode");
 767                 return wpa_supplicant_ap_wps_cancel(wpa_s);
 768         }
 769 #endif /* CONFIG_AP */
 770
 771         if (wpa_s->wpa_state == WPA_SCANNING) {
 772                 wpa_printf(MSG_DEBUG, "WPS: Cancel operation - cancel scan");
 773                 wpa_supplicant_cancel_scan(wpa_s);
 774                 wpas_clear_wps(wpa_s);
 775         } else if (wpa_s->wpa_state >= WPA_ASSOCIATED) {
 776                 wpa_printf(MSG_DEBUG, "WPS: Cancel operation - "
 777                            "deauthenticate");
 778                 wpa_supplicant_deauthenticate(wpa_s,
 779                                               WLAN_REASON_DEAUTH_LEAVING);
 780                 wpas_clear_wps(wpa_s);
 781         }
 782
 783         return 0;
 784 }
 785
 786
 787 #ifdef CONFIG_WPS_OOB
 788 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 789                        char *path, char *method, char *name)
 790 {
 791         struct wps_context *wps = wpa_s->wps;
 792         struct oob_device_data *oob_dev;
 793
 794         oob_dev = wps_get_oob_device(device_type);
 795         if (oob_dev == NULL)
 796                 return -1;
 797         oob_dev->device_path = path;
 798         oob_dev->device_name = name;
 799         wps->oob_conf.oob_method = wps_get_oob_method(method);
 800
 801         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 802                 /*
 803                  * Use pre-configured DH keys in order to be able to write the
 804                  * key hash into the OOB file.
 805                  */
 806                 wpabuf_free(wps->dh_pubkey);
 807                 wpabuf_free(wps->dh_privkey);
 808                 wps->dh_privkey = NULL;
 809                 wps->dh_pubkey = NULL;
 810                 dh5_free(wps->dh_ctx);
 811                 wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
 812                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 813                 if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
 814                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 815                                    "Diffie-Hellman handshake");
 816                         return -1;
 817                 }
 818         }
 819
 820         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 821                 wpas_clear_wps(wpa_s);
 822
 823         if (wps_process_oob(wps, oob_dev, 0) < 0)
 824                 return -1;
 825
 826         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 827              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 828             wpas_wps_start_pin(wpa_s, NULL,
 829                                wpabuf_head(wps->oob_conf.dev_password), 0) < 0)
 830                         return -1;
 831
 832         return 0;
 833 }
 834 #endif /* CONFIG_WPS_OOB */
 835
 836
 837 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 838                        const char *pin, struct wps_new_ap_settings *settings)
 839 {
 840         struct wpa_ssid *ssid;
 841         char val[200];
 842         char *pos, *end;
 843         int res;
 844
 845         if (!pin)
 846                 return -1;
 847         wpas_clear_wps(wpa_s);
 848         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 849         if (ssid == NULL)
 850                 return -1;
 851         ssid->temporary = 1;
 852         pos = val;
 853         end = pos + sizeof(val);
 854         res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
 855         if (res < 0 || res >= end - pos)
 856                 return -1;
 857         pos += res;
 858         if (settings) {
 859                 res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
 860                                   "new_encr=%s new_key=%s",
 861                                   settings->ssid_hex, settings->auth,
 862                                   settings->encr, settings->key_hex);
 863                 if (res < 0 || res >= end - pos)
 864                         return -1;
 865                 pos += res;
 866         }
 867         res = os_snprintf(pos, end - pos, "\"");
 868         if (res < 0 || res >= end - pos)
 869                 return -1;
 870         wpa_config_set(ssid, "phase1", val, 0);
 871         if (wpa_s->wps_fragment_size)
 872                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 873         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 874                                wpa_s, NULL);
 875         wpas_wps_reassoc(wpa_s, ssid);
 876         return 0;
 877 }
 878
 879
 880 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 881                                size_t psk_len)
 882 {
 883         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 884                    "STA " MACSTR, MAC2STR(mac_addr));
 885         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 886
 887         /* TODO */
 888
 889         return 0;
 890 }
 891
 892
 893 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 894                                    const struct wps_device_data *dev)
 895 {
 896         char uuid[40], txt[400];
 897         int len;
 898         char devtype[WPS_DEV_TYPE_BUFSIZE];
 899         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 900                 return;
 901         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 902         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 903                           " [%s|%s|%s|%s|%s|%s]",
 904                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 905                           dev->manufacturer, dev->model_name,
 906                           dev->model_number, dev->serial_number,
 907                           wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 908                                                sizeof(devtype)));
 909         if (len > 0 && len < (int) sizeof(txt))
 910                 wpa_printf(MSG_INFO, "%s", txt);
 911 }
 912
 913
 914 static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
 915                                     u16 sel_reg_config_methods)
 916 {
 917 #ifdef CONFIG_WPS_ER
 918         struct wpa_supplicant *wpa_s = ctx;
 919
 920         if (wpa_s->wps_er == NULL)
 921                 return;
 922         wpa_printf(MSG_DEBUG, "WPS ER: SetSelectedRegistrar - sel_reg=%d "
 923                    "dev_password_id=%u sel_reg_config_methods=0x%x",
 924                    sel_reg, dev_passwd_id, sel_reg_config_methods);
 925         wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
 926                            sel_reg_config_methods);
 927 #endif /* CONFIG_WPS_ER */
 928 }
 929
 930
 931 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 932 {
 933         struct wps_context *wps;
 934         struct wps_registrar_config rcfg;
 935
 936         wps = os_zalloc(sizeof(*wps));
 937         if (wps == NULL)
 938                 return -1;
 939
 940         wps->cred_cb = wpa_supplicant_wps_cred;
 941         wps->event_cb = wpa_supplicant_wps_event;
 942         wps->cb_ctx = wpa_s;
 943
 944         wps->dev.device_name = wpa_s->conf->device_name;
 945         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 946         wps->dev.model_name = wpa_s->conf->model_name;
 947         wps->dev.model_number = wpa_s->conf->model_number;
 948         wps->dev.serial_number = wpa_s->conf->serial_number;
 949         wps->config_methods =
 950                 wps_config_methods_str2bin(wpa_s->conf->config_methods);
 951         if ((wps->config_methods & (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
 952             (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
 953                 wpa_printf(MSG_ERROR, "WPS: Both Label and Display config "
 954                            "methods are not allowed at the same time");
 955                 os_free(wps);
 956                 return -1;
 957         }
 958         if (wpa_s->conf->device_type &&
 959             wps_dev_type_str2bin(wpa_s->conf->device_type,
 960                                  wps->dev.pri_dev_type) < 0) {
 961                 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 962                 os_free(wps);
 963                 return -1;
 964         }
 965         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 966         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 967         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 968         if (is_nil_uuid(wpa_s->conf->uuid)) {
 969                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 970                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 971                             wps->uuid, WPS_UUID_LEN);
 972         } else
 973                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 974
 975         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 976         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 977
 978         os_memset(&rcfg, 0, sizeof(rcfg));
 979         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 980         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 981         rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
 982         rcfg.cb_ctx = wpa_s;
 983
 984         wps->registrar = wps_registrar_init(wps, &rcfg);
 985         if (wps->registrar == NULL) {
 986                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 987                 os_free(wps);
 988                 return -1;
 989         }
 990
 991         wpa_s->wps = wps;
 992
 993         return 0;
 994 }
 995
 996
 997 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 998 {
 999         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
1000
1001         if (wpa_s->wps == NULL)
1002                 return;
1003
1004 #ifdef CONFIG_WPS_ER
1005         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
1006         wpa_s->wps_er = NULL;
1007 #endif /* CONFIG_WPS_ER */
1008
1009         wps_registrar_deinit(wpa_s->wps->registrar);
1010         wpabuf_free(wpa_s->wps->dh_pubkey);
1011         wpabuf_free(wpa_s->wps->dh_privkey);
1012         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
1013         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
1014         os_free(wpa_s->wps->network_key);
1015         os_free(wpa_s->wps);
1016         wpa_s->wps = NULL;
1017 }
1018
1019
1020 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
1021                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
1022 {
1023         struct wpabuf *wps_ie;
1024
1025         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
1026                 return -1;
1027
1028         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1029         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
1030                 if (!wps_ie) {
1031                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
1032                         return 0;
1033                 }
1034
1035                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
1036                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
1037                                    "without active PBC Registrar");
1038                         wpabuf_free(wps_ie);
1039                         return 0;
1040                 }
1041
1042                 /* TODO: overlap detection */
1043                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
1044                            "(Active PBC)");
1045                 wpabuf_free(wps_ie);
1046                 return 1;
1047         }
1048
1049         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
1050                 if (!wps_ie) {
1051                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
1052                         return 0;
1053                 }
1054
1055                 /*
1056                  * Start with WPS APs that advertise our address as an
1057                  * authorized MAC (v2.0) or active PIN Registrar (v1.0) and
1058                  * allow any WPS AP after couple of scans since some APs do not
1059                  * set Selected Registrar attribute properly when using
1060                  * external Registrar.
1061                  */
1062                 if (!wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1)) {
1063                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
1064                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
1065                                            "without active PIN Registrar");
1066                                 wpabuf_free(wps_ie);
1067                                 return 0;
1068                         }
1069                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1070                 } else {
1071                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
1072                                    "(Authorized MAC or Active PIN)");
1073                 }
1074                 wpabuf_free(wps_ie);
1075                 return 1;
1076         }
1077
1078         if (wps_ie) {
1079                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1080                 wpabuf_free(wps_ie);
1081                 return 1;
1082         }
1083
1084         return -1;
1085 }
1086
1087
1088 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
1089                               struct wpa_ssid *ssid,
1090                               struct wpa_scan_res *bss)
1091 {
1092         struct wpabuf *wps_ie = NULL;
1093         int ret = 0;
1094
1095         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
1096                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1097                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
1098                         /* allow wildcard SSID for WPS PBC */
1099                         ret = 1;
1100                 }
1101         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
1102                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1103                 if (wps_ie &&
1104                     (wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1) ||
1105                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
1106                         /* allow wildcard SSID for WPS PIN */
1107                         ret = 1;
1108                 }
1109         }
1110
1111         if (!ret && ssid->bssid_set &&
1112             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
1113                 /* allow wildcard SSID due to hardcoded BSSID match */
1114                 ret = 1;
1115         }
1116
1117 #ifdef CONFIG_WPS_STRICT
1118         if (wps_ie) {
1119                 if (wps_validate_beacon_probe_resp(wps_ie, bss->beacon_ie_len >
1120                                                    0, bss->bssid) < 0)
1121                         ret = 0;
1122                 if (bss->beacon_ie_len) {
1123                         struct wpabuf *bcn_wps;
1124                         bcn_wps = wpa_scan_get_vendor_ie_multi_beacon(
1125                                 bss, WPS_IE_VENDOR_TYPE);
1126                         if (bcn_wps == NULL) {
1127                                 wpa_printf(MSG_DEBUG, "WPS: Mandatory WPS IE "
1128                                            "missing from AP Beacon");
1129                                 ret = 0;
1130                         } else {
1131                                 if (wps_validate_beacon(wps_ie) < 0)
1132                                         ret = 0;
1133                                 wpabuf_free(bcn_wps);
1134                         }
1135                 }
1136         }
1137 #endif /* CONFIG_WPS_STRICT */
1138
1139         wpabuf_free(wps_ie);
1140
1141         return ret;
1142 }
1143
1144
1145 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
1146                               struct wpa_bss *selected, struct wpa_ssid *ssid)
1147 {
1148         const u8 *sel_uuid, *uuid;
1149         struct wpabuf *wps_ie;
1150         int ret = 0;
1151         struct wpa_bss *bss;
1152
1153         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
1154                 return 0;
1155
1156         wpa_printf(MSG_DEBUG, "WPS: Check whether PBC session overlap is "
1157                    "present in scan results; selected BSSID " MACSTR,
1158                    MAC2STR(selected->bssid));
1159
1160         /* Make sure that only one AP is in active PBC mode */
1161         wps_ie = wpa_bss_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
1162         if (wps_ie) {
1163                 sel_uuid = wps_get_uuid_e(wps_ie);
1164                 wpa_hexdump(MSG_DEBUG, "WPS: UUID of the selected BSS",
1165                             sel_uuid, UUID_LEN);
1166         } else {
1167                 wpa_printf(MSG_DEBUG, "WPS: Selected BSS does not include "
1168                            "WPS IE?!");
1169                 sel_uuid = NULL;
1170         }
1171
1172         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1173                 struct wpabuf *ie;
1174                 if (bss == selected)
1175                         continue;
1176                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1177                 if (!ie)
1178                         continue;
1179                 if (!wps_is_selected_pbc_registrar(ie)) {
1180                         wpabuf_free(ie);
1181                         continue;
1182                 }
1183                 wpa_printf(MSG_DEBUG, "WPS: Another BSS in active PBC mode: "
1184                            MACSTR, MAC2STR(bss->bssid));
1185                 uuid = wps_get_uuid_e(ie);
1186                 wpa_hexdump(MSG_DEBUG, "WPS: UUID of the other BSS",
1187                             uuid, UUID_LEN);
1188                 if (sel_uuid == NULL || uuid == NULL ||
1189                     os_memcmp(sel_uuid, uuid, UUID_LEN) != 0) {
1190                         ret = 1; /* PBC overlap */
1191                         wpa_msg(wpa_s, MSG_INFO, "WPS: PBC overlap detected: "
1192                                 MACSTR " and " MACSTR,
1193                                 MAC2STR(selected->bssid),
1194                                 MAC2STR(bss->bssid));
1195                         wpabuf_free(ie);
1196                         break;
1197                 }
1198
1199                 /* TODO: verify that this is reasonable dual-band situation */
1200
1201                 wpabuf_free(ie);
1202         }
1203
1204         wpabuf_free(wps_ie);
1205
1206         return ret;
1207 }
1208
1209
1210 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
1211 {
1212         struct wpa_bss *bss;
1213
1214         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
1215                 return;
1216
1217         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1218                 struct wpabuf *ie;
1219                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1220                 if (!ie)
1221                         continue;
1222                 if (wps_is_selected_pbc_registrar(ie))
1223                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1224                                      WPS_EVENT_AP_AVAILABLE_PBC);
1225                 else if (wps_is_addr_authorized(ie, wpa_s->own_addr, 0))
1226                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1227                                      WPS_EVENT_AP_AVAILABLE_AUTH);
1228                 else if (wps_is_selected_pin_registrar(ie))
1229                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1230                                      WPS_EVENT_AP_AVAILABLE_PIN);
1231                 else
1232                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1233                                      WPS_EVENT_AP_AVAILABLE);
1234                 wpabuf_free(ie);
1235                 break;
1236         }
1237 }
1238
1239
1240 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
1241 {
1242         struct wpa_ssid *ssid;
1243
1244         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1245                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
1246                         return 1;
1247         }
1248
1249         return 0;
1250 }
1251
1252
1253 int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
1254                               char *end)
1255 {
1256         struct wpabuf *wps_ie;
1257         int ret;
1258
1259         wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
1260         if (wps_ie == NULL)
1261                 return 0;
1262
1263         ret = wps_attr_text(wps_ie, buf, end);
1264         wpabuf_free(wps_ie);
1265         return ret;
1266 }
1267
1268
1269 int wpas_wps_er_start(struct wpa_supplicant *wpa_s, const char *filter)
1270 {
1271 #ifdef CONFIG_WPS_ER
1272         if (wpa_s->wps_er) {
1273                 wps_er_refresh(wpa_s->wps_er);
1274                 return 0;
1275         }
1276         wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname, filter);
1277         if (wpa_s->wps_er == NULL)
1278                 return -1;
1279         return 0;
1280 #else /* CONFIG_WPS_ER */
1281         return 0;
1282 #endif /* CONFIG_WPS_ER */
1283 }
1284
1285
1286 int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
1287 {
1288 #ifdef CONFIG_WPS_ER
1289         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
1290         wpa_s->wps_er = NULL;
1291 #endif /* CONFIG_WPS_ER */
1292         return 0;
1293 }
1294
1295
1296 #ifdef CONFIG_WPS_ER
1297 int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const u8 *addr,
1298                         const char *uuid, const char *pin)
1299 {
1300         u8 u[UUID_LEN];
1301         int any = 0;
1302
1303         if (os_strcmp(uuid, "any") == 0)
1304                 any = 1;
1305         else if (uuid_str2bin(uuid, u))
1306                 return -1;
1307         return wps_registrar_add_pin(wpa_s->wps->registrar, addr,
1308                                      any ? NULL : u,
1309                                      (const u8 *) pin, os_strlen(pin), 300);
1310 }
1311
1312
1313 int wpas_wps_er_pbc(struct wpa_supplicant *wpa_s, const char *uuid)
1314 {
1315         u8 u[UUID_LEN];
1316
1317         if (uuid_str2bin(uuid, u))
1318                 return -1;
1319         return wps_er_pbc(wpa_s->wps_er, u);
1320 }
1321
1322
1323 int wpas_wps_er_learn(struct wpa_supplicant *wpa_s, const char *uuid,
1324                       const char *pin)
1325 {
1326         u8 u[UUID_LEN];
1327
1328         if (uuid_str2bin(uuid, u))
1329                 return -1;
1330         return wps_er_learn(wpa_s->wps_er, u, (const u8 *) pin,
1331                             os_strlen(pin));
1332 }
1333
1334
1335 int wpas_wps_er_config(struct wpa_supplicant *wpa_s, const char *uuid,
1336                        const char *pin, struct wps_new_ap_settings *settings)
1337 {
1338         u8 u[UUID_LEN];
1339         struct wps_credential cred;
1340         size_t len;
1341
1342         if (uuid_str2bin(uuid, u))
1343                 return -1;
1344         if (settings->ssid_hex == NULL || settings->auth == NULL ||
1345             settings->encr == NULL || settings->key_hex == NULL)
1346                 return -1;
1347
1348         os_memset(&cred, 0, sizeof(cred));
1349         len = os_strlen(settings->ssid_hex);
1350         if ((len & 1) || len > 2 * sizeof(cred.ssid) ||
1351             hexstr2bin(settings->ssid_hex, cred.ssid, len / 2))
1352                 return -1;
1353         cred.ssid_len = len / 2;
1354
1355         len = os_strlen(settings->key_hex);
1356         if ((len & 1) || len > 2 * sizeof(cred.key) ||
1357             hexstr2bin(settings->key_hex, cred.key, len / 2))
1358                 return -1;
1359         cred.key_len = len / 2;
1360
1361         if (os_strcmp(settings->auth, "OPEN") == 0)
1362                 cred.auth_type = WPS_AUTH_OPEN;
1363         else if (os_strcmp(settings->auth, "WPAPSK") == 0)
1364                 cred.auth_type = WPS_AUTH_WPAPSK;
1365         else if (os_strcmp(settings->auth, "WPA2PSK") == 0)
1366                 cred.auth_type = WPS_AUTH_WPA2PSK;
1367         else
1368                 return -1;
1369
1370         if (os_strcmp(settings->encr, "NONE") == 0)
1371                 cred.encr_type = WPS_ENCR_NONE;
1372         else if (os_strcmp(settings->encr, "WEP") == 0)
1373                 cred.encr_type = WPS_ENCR_WEP;
1374         else if (os_strcmp(settings->encr, "TKIP") == 0)
1375                 cred.encr_type = WPS_ENCR_TKIP;
1376         else if (os_strcmp(settings->encr, "CCMP") == 0)
1377                 cred.encr_type = WPS_ENCR_AES;
1378         else
1379                 return -1;
1380
1381         return wps_er_config(wpa_s->wps_er, u, (const u8 *) pin,
1382                              os_strlen(pin), &cred);
1383 }
1384
1385
1386 static void wpas_wps_terminate_cb(void *ctx)
1387 {
1388         wpa_printf(MSG_DEBUG, "WPS ER: Terminated");
1389         eloop_terminate();
1390 }
1391 #endif /* CONFIG_WPS_ER */
1392
1393
1394 int wpas_wps_terminate_pending(struct wpa_supplicant *wpa_s)
1395 {
1396 #ifdef CONFIG_WPS_ER
1397         if (wpa_s->wps_er) {
1398                 wps_er_deinit(wpa_s->wps_er, wpas_wps_terminate_cb, wpa_s);
1399                 wpa_s->wps_er = NULL;
1400                 return 1;
1401         }
1402 #endif /* CONFIG_WPS_ER */
1403         return 0;
1404 }
1405
1406
1407 int wpas_wps_in_progress(struct wpa_supplicant *wpa_s)
1408 {
1409         struct wpa_ssid *ssid;
1410
1411         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1412                 if (!ssid->disabled && ssid->key_mgmt == WPA_KEY_MGMT_WPS)
1413                         return 1;
1414         }
1415
1416         return 0;
1417 }
1418
1419
1420 void wpas_wps_update_config(struct wpa_supplicant *wpa_s)
1421 {
1422         struct wps_context *wps = wpa_s->wps;
1423
1424         if (wps == NULL)
1425                 return;
1426
1427         if (wpa_s->conf->changed_parameters & CFG_CHANGED_CONFIG_METHODS) {
1428                 wps->config_methods = wps_config_methods_str2bin(
1429                         wpa_s->conf->config_methods);
1430                 if ((wps->config_methods &
1431                      (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
1432                     (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
1433                         wpa_printf(MSG_ERROR, "WPS: Both Label and Display "
1434                                    "config methods are not allowed at the "
1435                                    "same time");
1436                         wps->config_methods &= ~WPS_CONFIG_LABEL;
1437                 }
1438         }
1439
1440         if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_TYPE) {
1441                 if (wpa_s->conf->device_type &&
1442                     wps_dev_type_str2bin(wpa_s->conf->device_type,
1443                                          wps->dev.pri_dev_type) < 0)
1444                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
1445         }
1446
1447         if (wpa_s->conf->changed_parameters & CFG_CHANGED_OS_VERSION)
1448                 wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
1449
1450         if (wpa_s->conf->changed_parameters & CFG_CHANGED_UUID) {
1451                 if (is_nil_uuid(wpa_s->conf->uuid)) {
1452                         uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
1453                         wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
1454                                     "address", wps->uuid, WPS_UUID_LEN);
1455                 } else
1456                         os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
1457         }
1458
1459         if (wpa_s->conf->changed_parameters &
1460             (CFG_CHANGED_DEVICE_NAME | CFG_CHANGED_WPS_STRING)) {
1461                 /* Update pointers to make sure they refer current values */
1462                 wps->dev.device_name = wpa_s->conf->device_name;
1463                 wps->dev.manufacturer = wpa_s->conf->manufacturer;
1464                 wps->dev.model_name = wpa_s->conf->model_name;
1465                 wps->dev.model_number = wpa_s->conf->model_number;
1466                 wps->dev.serial_number = wpa_s->conf->serial_number;
1467         }
1468 }