wpa_supplicant/wps_supplicant.c

   1 /*
   2  * wpa_supplicant / WPS integration
   3  * Copyright (c) 2008, 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 "wps_supplicant.h"
  34
  35 #define WPS_PIN_SCAN_IGNORE_SEL_REG 3
  36
  37 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
  38 static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
  39
  40
  41 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
  42 {
  43         if (!wpa_s->wps_success &&
  44             wpa_s->current_ssid &&
  45             eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
  46                 const u8 *bssid = wpa_s->bssid;
  47                 if (is_zero_ether_addr(bssid))
  48                         bssid = wpa_s->pending_bssid;
  49
  50                 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
  51                            " did not succeed - continue trying to find "
  52                            "suitable AP", MAC2STR(bssid));
  53                 wpa_blacklist_add(wpa_s, bssid);
  54
  55                 wpa_supplicant_deauthenticate(wpa_s,
  56                                               WLAN_REASON_DEAUTH_LEAVING);
  57                 wpa_s->reassociate = 1;
  58                 wpa_supplicant_req_scan(wpa_s,
  59                                         wpa_s->blacklist_cleared ? 5 : 0, 0);
  60                 wpa_s->blacklist_cleared = 0;
  61                 return 1;
  62         }
  63
  64         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
  65
  66         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
  67             !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
  68                 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
  69                            "try to associate with the received credential");
  70                 wpa_supplicant_deauthenticate(wpa_s,
  71                                               WLAN_REASON_DEAUTH_LEAVING);
  72                 wpa_s->reassociate = 1;
  73                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  74                 return 1;
  75         }
  76
  77         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
  78                 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
  79                            "for external credential processing");
  80                 wpas_clear_wps(wpa_s);
  81                 wpa_supplicant_deauthenticate(wpa_s,
  82                                               WLAN_REASON_DEAUTH_LEAVING);
  83                 return 1;
  84         }
  85
  86         return 0;
  87 }
  88
  89
  90 static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
  91                                          struct wpa_ssid *ssid,
  92                                          const struct wps_credential *cred)
  93 {
  94         struct wpa_driver_capa capa;
  95         size_t i;
  96         struct wpa_scan_res *bss;
  97         const u8 *ie;
  98         struct wpa_ie_data adv;
  99         int wpa2 = 0, ccmp = 0;
 100
 101         /*
 102          * Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
 103          * case they are configured for mixed mode operation (WPA+WPA2 and
 104          * TKIP+CCMP). Try to use scan results to figure out whether the AP
 105          * actually supports stronger security and select that if the client
 106          * has support for it, too.
 107          */
 108
 109         if (wpa_drv_get_capa(wpa_s, &capa))
 110                 return; /* Unknown what driver supports */
 111
 112         if (wpa_supplicant_get_scan_results(wpa_s) || wpa_s->scan_res == NULL)
 113                 return; /* Could not get scan results for checking advertised
 114                          * parameters */
 115
 116         for (i = 0; i < wpa_s->scan_res->num; i++) {
 117                 bss = wpa_s->scan_res->res[i];
 118                 if (os_memcmp(bss->bssid, cred->mac_addr, ETH_ALEN) != 0)
 119                         continue;
 120                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 121                 if (ie == NULL)
 122                         continue;
 123                 if (ie[1] != ssid->ssid_len || ssid->ssid == NULL ||
 124                     os_memcmp(ie + 2, ssid->ssid, ssid->ssid_len) != 0)
 125                         continue;
 126
 127                 wpa_printf(MSG_DEBUG, "WPS: AP found from scan results");
 128                 break;
 129         }
 130
 131         if (i == wpa_s->scan_res->num) {
 132                 wpa_printf(MSG_DEBUG, "WPS: The AP was not found from scan "
 133                            "results - use credential as-is");
 134                 return;
 135         }
 136
 137         ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 138         if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
 139                 wpa2 = 1;
 140                 if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
 141                         ccmp = 1;
 142         } else {
 143                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 144                 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
 145                     adv.pairwise_cipher & WPA_CIPHER_CCMP)
 146                         ccmp = 1;
 147         }
 148
 149         if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
 150             (ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
 151                 /*
 152                  * TODO: This could be the initial AP configuration and the
 153                  * Beacon contents could change shortly. Should request a new
 154                  * scan and delay addition of the network until the updated
 155                  * scan results are available.
 156                  */
 157                 wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
 158                            "support - use credential as-is");
 159                 return;
 160         }
 161
 162         if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 163             (ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
 164             (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
 165                 wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
 166                            "based on scan results");
 167                 if (wpa_s->conf->ap_scan == 1)
 168                         ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
 169                 else
 170                         ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 171         }
 172
 173         if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
 174             (ssid->proto & WPA_PROTO_WPA) &&
 175             (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
 176                 wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
 177                            "based on scan results");
 178                 if (wpa_s->conf->ap_scan == 1)
 179                         ssid->proto |= WPA_PROTO_RSN;
 180                 else
 181                         ssid->proto = WPA_PROTO_RSN;
 182         }
 183 }
 184
 185
 186 static int wpa_supplicant_wps_cred(void *ctx,
 187                                    const struct wps_credential *cred)
 188 {
 189         struct wpa_supplicant *wpa_s = ctx;
 190         struct wpa_ssid *ssid = wpa_s->current_ssid;
 191         u8 key_idx = 0;
 192         u16 auth_type;
 193
 194         if ((wpa_s->conf->wps_cred_processing == 1 ||
 195              wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) {
 196                 size_t blen = cred->cred_attr_len * 2 + 1;
 197                 char *buf = os_malloc(blen);
 198                 if (buf) {
 199                         wpa_snprintf_hex(buf, blen,
 200                                          cred->cred_attr, cred->cred_attr_len);
 201                         wpa_msg(wpa_s, MSG_INFO, "%s%s",
 202                                 WPS_EVENT_CRED_RECEIVED, buf);
 203                         os_free(buf);
 204                 }
 205
 206                 wpas_notify_wps_credential(wpa_s, cred);
 207         } else
 208                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
 209
 210         wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
 211                         cred->cred_attr, cred->cred_attr_len);
 212
 213         if (wpa_s->conf->wps_cred_processing == 1)
 214                 return 0;
 215
 216         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
 217         wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
 218                    cred->auth_type);
 219         wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
 220         wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
 221         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
 222                         cred->key, cred->key_len);
 223         wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
 224                    MAC2STR(cred->mac_addr));
 225
 226         auth_type = cred->auth_type;
 227         if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 228                 wpa_printf(MSG_DEBUG, "WPS: Workaround - convert mixed-mode "
 229                            "auth_type into WPA2PSK");
 230                 auth_type = WPS_AUTH_WPA2PSK;
 231         }
 232
 233         if (auth_type != WPS_AUTH_OPEN &&
 234             auth_type != WPS_AUTH_SHARED &&
 235             auth_type != WPS_AUTH_WPAPSK &&
 236             auth_type != WPS_AUTH_WPA2PSK) {
 237                 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
 238                            "unsupported authentication type 0x%x",
 239                            auth_type);
 240                 return 0;
 241         }
 242
 243         if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 244                 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
 245                            "on the received credential");
 246                 os_free(ssid->eap.identity);
 247                 ssid->eap.identity = NULL;
 248                 ssid->eap.identity_len = 0;
 249                 os_free(ssid->eap.phase1);
 250                 ssid->eap.phase1 = NULL;
 251                 os_free(ssid->eap.eap_methods);
 252                 ssid->eap.eap_methods = NULL;
 253         } else {
 254                 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
 255                            "received credential");
 256                 ssid = wpa_config_add_network(wpa_s->conf);
 257                 if (ssid == NULL)
 258                         return -1;
 259                 wpas_notify_network_added(wpa_s, ssid);
 260         }
 261
 262         wpa_config_set_network_defaults(ssid);
 263
 264         os_free(ssid->ssid);
 265         ssid->ssid = os_malloc(cred->ssid_len);
 266         if (ssid->ssid) {
 267                 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
 268                 ssid->ssid_len = cred->ssid_len;
 269         }
 270
 271         switch (cred->encr_type) {
 272         case WPS_ENCR_NONE:
 273                 break;
 274         case WPS_ENCR_WEP:
 275                 if (cred->key_len <= 0)
 276                         break;
 277                 if (cred->key_len != 5 && cred->key_len != 13 &&
 278                     cred->key_len != 10 && cred->key_len != 26) {
 279                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
 280                                    "%lu", (unsigned long) cred->key_len);
 281                         return -1;
 282                 }
 283                 if (cred->key_idx > NUM_WEP_KEYS) {
 284                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
 285                                    cred->key_idx);
 286                         return -1;
 287                 }
 288                 if (cred->key_idx)
 289                         key_idx = cred->key_idx - 1;
 290                 if (cred->key_len == 10 || cred->key_len == 26) {
 291                         if (hexstr2bin((char *) cred->key,
 292                                        ssid->wep_key[key_idx],
 293                                        cred->key_len / 2) < 0) {
 294                                 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
 295                                            "%d", key_idx);
 296                                 return -1;
 297                         }
 298                         ssid->wep_key_len[key_idx] = cred->key_len / 2;
 299                 } else {
 300                         os_memcpy(ssid->wep_key[key_idx], cred->key,
 301                                   cred->key_len);
 302                         ssid->wep_key_len[key_idx] = cred->key_len;
 303                 }
 304                 ssid->wep_tx_keyidx = key_idx;
 305                 break;
 306         case WPS_ENCR_TKIP:
 307                 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
 308                 break;
 309         case WPS_ENCR_AES:
 310                 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 311                 break;
 312         }
 313
 314         switch (auth_type) {
 315         case WPS_AUTH_OPEN:
 316                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 317                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 318                 ssid->proto = 0;
 319                 break;
 320         case WPS_AUTH_SHARED:
 321                 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 322                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 323                 ssid->proto = 0;
 324                 break;
 325         case WPS_AUTH_WPAPSK:
 326                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 327                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 328                 ssid->proto = WPA_PROTO_WPA;
 329                 break;
 330         case WPS_AUTH_WPA:
 331                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 332                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 333                 ssid->proto = WPA_PROTO_WPA;
 334                 break;
 335         case WPS_AUTH_WPA2:
 336                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 337                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 338                 ssid->proto = WPA_PROTO_RSN;
 339                 break;
 340         case WPS_AUTH_WPA2PSK:
 341                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 342                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 343                 ssid->proto = WPA_PROTO_RSN;
 344                 break;
 345         }
 346
 347         if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
 348                 if (cred->key_len == 2 * PMK_LEN) {
 349                         if (hexstr2bin((const char *) cred->key, ssid->psk,
 350                                        PMK_LEN)) {
 351                                 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
 352                                            "Key");
 353                                 return -1;
 354                         }
 355                         ssid->psk_set = 1;
 356                 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
 357                         os_free(ssid->passphrase);
 358                         ssid->passphrase = os_malloc(cred->key_len + 1);
 359                         if (ssid->passphrase == NULL)
 360                                 return -1;
 361                         os_memcpy(ssid->passphrase, cred->key, cred->key_len);
 362                         ssid->passphrase[cred->key_len] = '\0';
 363                         wpa_config_update_psk(ssid);
 364                 } else {
 365                         wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
 366                                    "length %lu",
 367                                    (unsigned long) cred->key_len);
 368                         return -1;
 369                 }
 370         }
 371
 372         wpas_wps_security_workaround(wpa_s, ssid, cred);
 373
 374 #ifndef CONFIG_NO_CONFIG_WRITE
 375         if (wpa_s->conf->update_config &&
 376             wpa_config_write(wpa_s->confname, wpa_s->conf)) {
 377                 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
 378                 return -1;
 379         }
 380 #endif /* CONFIG_NO_CONFIG_WRITE */
 381
 382         return 0;
 383 }
 384
 385
 386 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
 387                                          struct wps_event_m2d *m2d)
 388 {
 389         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
 390                 "dev_password_id=%d config_error=%d",
 391                 m2d->dev_password_id, m2d->config_error);
 392         wpas_notify_wps_event_m2d(wpa_s, m2d);
 393 }
 394
 395
 396 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
 397                                           struct wps_event_fail *fail)
 398 {
 399         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
 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 }
 411
 412
 413 static void wpa_supplicant_wps_event_er_ap_add(struct wpa_supplicant *wpa_s,
 414                                                struct wps_event_er_ap *ap)
 415 {
 416         char uuid_str[100];
 417         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 418
 419         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 420         if (ap->pri_dev_type)
 421                 wps_dev_type_bin2str(ap->pri_dev_type, dev_type,
 422                                      sizeof(dev_type));
 423         else
 424                 dev_type[0] = '\0';
 425
 426         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s " MACSTR
 427                 " pri_dev_type=%s wps_state=%d |%s|%s|%s|%s|%s|%s|",
 428                 uuid_str, MAC2STR(ap->mac_addr), dev_type, ap->wps_state,
 429                 ap->friendly_name ? ap->friendly_name : "",
 430                 ap->manufacturer ? ap->manufacturer : "",
 431                 ap->model_description ? ap->model_description : "",
 432                 ap->model_name ? ap->model_name : "",
 433                 ap->manufacturer_url ? ap->manufacturer_url : "",
 434                 ap->model_url ? ap->model_url : "");
 435 }
 436
 437
 438 static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
 439                                                   struct wps_event_er_ap *ap)
 440 {
 441         char uuid_str[100];
 442         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 443         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
 444 }
 445
 446
 447 static void wpa_supplicant_wps_event_er_enrollee_add(
 448         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 449 {
 450         char uuid_str[100];
 451         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 452
 453         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 454         if (enrollee->pri_dev_type)
 455                 wps_dev_type_bin2str(enrollee->pri_dev_type, dev_type,
 456                                      sizeof(dev_type));
 457         else
 458                 dev_type[0] = '\0';
 459
 460         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
 461                 " M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
 462                 "|%s|%s|%s|%s|%s|",
 463                 uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
 464                 enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
 465                 enrollee->dev_name ? enrollee->dev_name : "",
 466                 enrollee->manufacturer ? enrollee->manufacturer : "",
 467                 enrollee->model_name ? enrollee->model_name : "",
 468                 enrollee->model_number ? enrollee->model_number : "",
 469                 enrollee->serial_number ? enrollee->serial_number : "");
 470 }
 471
 472
 473 static void wpa_supplicant_wps_event_er_enrollee_remove(
 474         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 475 {
 476         char uuid_str[100];
 477         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 478         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
 479                 uuid_str, MAC2STR(enrollee->mac_addr));
 480 }
 481
 482
 483 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 484                                      union wps_event_data *data)
 485 {
 486         struct wpa_supplicant *wpa_s = ctx;
 487         switch (event) {
 488         case WPS_EV_M2D:
 489                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 490                 break;
 491         case WPS_EV_FAIL:
 492                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 493                 break;
 494         case WPS_EV_SUCCESS:
 495                 wpa_supplicant_wps_event_success(wpa_s);
 496                 break;
 497         case WPS_EV_PWD_AUTH_FAIL:
 498                 break;
 499         case WPS_EV_PBC_OVERLAP:
 500                 break;
 501         case WPS_EV_PBC_TIMEOUT:
 502                 break;
 503         case WPS_EV_ER_AP_ADD:
 504                 wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
 505                 break;
 506         case WPS_EV_ER_AP_REMOVE:
 507                 wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
 508                 break;
 509         case WPS_EV_ER_ENROLLEE_ADD:
 510                 wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
 511                                                          &data->enrollee);
 512                 break;
 513         case WPS_EV_ER_ENROLLEE_REMOVE:
 514                 wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
 515                                                             &data->enrollee);
 516                 break;
 517         }
 518 }
 519
 520
 521 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 522 {
 523         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 524             eap_is_wps_pin_enrollee(&ssid->eap))
 525                 return WPS_REQ_ENROLLEE;
 526         else
 527                 return WPS_REQ_REGISTRAR;
 528 }
 529
 530
 531 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 532 {
 533         int id;
 534         struct wpa_ssid *ssid, *remove_ssid = NULL;
 535
 536         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 537
 538         /* Remove any existing WPS network from configuration */
 539         ssid = wpa_s->conf->ssid;
 540         while (ssid) {
 541                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 542                         if (ssid == wpa_s->current_ssid) {
 543                                 wpa_s->current_ssid = NULL;
 544                                 if (ssid != NULL)
 545                                         wpas_notify_network_changed(wpa_s);
 546                         }
 547                         id = ssid->id;
 548                         remove_ssid = ssid;
 549                 } else
 550                         id = -1;
 551                 ssid = ssid->next;
 552                 if (id >= 0) {
 553                         wpas_notify_network_removed(wpa_s, remove_ssid);
 554                         wpa_config_remove_network(wpa_s->conf, id);
 555                 }
 556         }
 557 }
 558
 559
 560 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 561 {
 562         struct wpa_supplicant *wpa_s = eloop_ctx;
 563         wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 564                    "out");
 565         wpas_clear_wps(wpa_s);
 566 }
 567
 568
 569 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 570                                               int registrar, const u8 *bssid)
 571 {
 572         struct wpa_ssid *ssid;
 573
 574         ssid = wpa_config_add_network(wpa_s->conf);
 575         if (ssid == NULL)
 576                 return NULL;
 577         wpas_notify_network_added(wpa_s, ssid);
 578         wpa_config_set_network_defaults(ssid);
 579         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 580             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 581             wpa_config_set(ssid, "identity", registrar ?
 582                            "\"" WSC_ID_REGISTRAR "\"" :
 583                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 584                 wpas_notify_network_removed(wpa_s, ssid);
 585                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 586                 return NULL;
 587         }
 588
 589         if (bssid) {
 590                 size_t i;
 591                 struct wpa_scan_res *res;
 592
 593                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 594                 ssid->bssid_set = 1;
 595
 596                 /* Try to get SSID from scan results */
 597                 if (wpa_s->scan_res == NULL &&
 598                     wpa_supplicant_get_scan_results(wpa_s) < 0)
 599                         return ssid; /* Could not find any scan results */
 600
 601                 for (i = 0; i < wpa_s->scan_res->num; i++) {
 602                         const u8 *ie;
 603
 604                         res = wpa_s->scan_res->res[i];
 605                         if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
 606                                 continue;
 607
 608                         ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 609                         if (ie == NULL)
 610                                 break;
 611                         os_free(ssid->ssid);
 612                         ssid->ssid = os_malloc(ie[1]);
 613                         if (ssid->ssid == NULL)
 614                                 break;
 615                         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 616                         ssid->ssid_len = ie[1];
 617                         break;
 618                 }
 619         }
 620
 621         return ssid;
 622 }
 623
 624
 625 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 626                              struct wpa_ssid *selected)
 627 {
 628         struct wpa_ssid *ssid;
 629
 630         /* Mark all other networks disabled and trigger reassociation */
 631         ssid = wpa_s->conf->ssid;
 632         while (ssid) {
 633                 int was_disabled = ssid->disabled;
 634                 ssid->disabled = ssid != selected;
 635                 if (was_disabled != ssid->disabled)
 636                         wpas_notify_network_enabled_changed(wpa_s, ssid);
 637                 ssid = ssid->next;
 638         }
 639         wpa_s->disconnected = 0;
 640         wpa_s->reassociate = 1;
 641         wpa_s->scan_runs = 0;
 642         wpa_s->wps_success = 0;
 643         wpa_s->blacklist_cleared = 0;
 644         wpa_supplicant_req_scan(wpa_s, 0, 0);
 645 }
 646
 647
 648 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 649 {
 650         struct wpa_ssid *ssid;
 651         wpas_clear_wps(wpa_s);
 652         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 653         if (ssid == NULL)
 654                 return -1;
 655         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 656         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 657                                wpa_s, NULL);
 658         wpas_wps_reassoc(wpa_s, ssid);
 659         return 0;
 660 }
 661
 662
 663 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 664                        const char *pin)
 665 {
 666         struct wpa_ssid *ssid;
 667         char val[128];
 668         unsigned int rpin = 0;
 669
 670         wpas_clear_wps(wpa_s);
 671         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 672         if (ssid == NULL)
 673                 return -1;
 674         if (pin)
 675                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 676         else {
 677                 rpin = wps_generate_pin();
 678                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 679         }
 680         wpa_config_set(ssid, "phase1", val, 0);
 681         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 682                                wpa_s, NULL);
 683         wpas_wps_reassoc(wpa_s, ssid);
 684         return rpin;
 685 }
 686
 687
 688 #ifdef CONFIG_WPS_OOB
 689 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 690                        char *path, char *method, char *name)
 691 {
 692         struct wps_context *wps = wpa_s->wps;
 693         struct oob_device_data *oob_dev;
 694
 695         oob_dev = wps_get_oob_device(device_type);
 696         if (oob_dev == NULL)
 697                 return -1;
 698         oob_dev->device_path = path;
 699         oob_dev->device_name = name;
 700         wps->oob_conf.oob_method = wps_get_oob_method(method);
 701
 702         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 703                 /*
 704                  * Use pre-configured DH keys in order to be able to write the
 705                  * key hash into the OOB file.
 706                  */
 707                 wpabuf_free(wps->dh_pubkey);
 708                 wpabuf_free(wps->dh_privkey);
 709                 wps->dh_privkey = NULL;
 710                 wps->dh_pubkey = NULL;
 711                 dh5_free(wps->dh_ctx);
 712                 wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
 713                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 714                 if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
 715                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 716                                    "Diffie-Hellman handshake");
 717                         return -1;
 718                 }
 719         }
 720
 721         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 722                 wpas_clear_wps(wpa_s);
 723
 724         if (wps_process_oob(wps, oob_dev, 0) < 0)
 725                 return -1;
 726
 727         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 728              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 729             wpas_wps_start_pin(wpa_s, NULL,
 730                                wpabuf_head(wps->oob_conf.dev_password)) < 0)
 731                         return -1;
 732
 733         return 0;
 734 }
 735 #endif /* CONFIG_WPS_OOB */
 736
 737
 738 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 739                        const char *pin, struct wps_new_ap_settings *settings)
 740 {
 741         struct wpa_ssid *ssid;
 742         char val[200];
 743         char *pos, *end;
 744         int res;
 745
 746         if (!pin)
 747                 return -1;
 748         wpas_clear_wps(wpa_s);
 749         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 750         if (ssid == NULL)
 751                 return -1;
 752         pos = val;
 753         end = pos + sizeof(val);
 754         res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
 755         if (res < 0 || res >= end - pos)
 756                 return -1;
 757         pos += res;
 758         if (settings) {
 759                 res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
 760                                   "new_encr=%s new_key=%s",
 761                                   settings->ssid_hex, settings->auth,
 762                                   settings->encr, settings->key_hex);
 763                 if (res < 0 || res >= end - pos)
 764                         return -1;
 765                 pos += res;
 766         }
 767         res = os_snprintf(pos, end - pos, "\"");
 768         if (res < 0 || res >= end - pos)
 769                 return -1;
 770         wpa_config_set(ssid, "phase1", val, 0);
 771         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 772                                wpa_s, NULL);
 773         wpas_wps_reassoc(wpa_s, ssid);
 774         return 0;
 775 }
 776
 777
 778 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 779                                size_t psk_len)
 780 {
 781         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 782                    "STA " MACSTR, MAC2STR(mac_addr));
 783         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 784
 785         /* TODO */
 786
 787         return 0;
 788 }
 789
 790
 791 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 792                                    const struct wps_device_data *dev)
 793 {
 794         char uuid[40], txt[400];
 795         int len;
 796         char devtype[WPS_DEV_TYPE_BUFSIZE];
 797         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 798                 return;
 799         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 800         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 801                           " [%s|%s|%s|%s|%s|%s]",
 802                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 803                           dev->manufacturer, dev->model_name,
 804                           dev->model_number, dev->serial_number,
 805                           wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 806                                                sizeof(devtype)));
 807         if (len > 0 && len < (int) sizeof(txt))
 808                 wpa_printf(MSG_INFO, "%s", txt);
 809 }
 810
 811
 812 static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
 813                                     u16 sel_reg_config_methods)
 814 {
 815 #ifdef CONFIG_WPS_ER
 816         struct wpa_supplicant *wpa_s = ctx;
 817
 818         if (wpa_s->wps_er == NULL)
 819                 return;
 820         wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
 821                            sel_reg_config_methods);
 822 #endif /* CONFIG_WPS_ER */
 823 }
 824
 825
 826 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 827 {
 828         struct wps_context *wps;
 829         struct wps_registrar_config rcfg;
 830
 831         wps = os_zalloc(sizeof(*wps));
 832         if (wps == NULL)
 833                 return -1;
 834
 835         wps->cred_cb = wpa_supplicant_wps_cred;
 836         wps->event_cb = wpa_supplicant_wps_event;
 837         wps->cb_ctx = wpa_s;
 838
 839         wps->dev.device_name = wpa_s->conf->device_name;
 840         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 841         wps->dev.model_name = wpa_s->conf->model_name;
 842         wps->dev.model_number = wpa_s->conf->model_number;
 843         wps->dev.serial_number = wpa_s->conf->serial_number;
 844         if (wpa_s->conf->device_type &&
 845             wps_dev_type_str2bin(wpa_s->conf->device_type,
 846                                  wps->dev.pri_dev_type) < 0) {
 847                 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 848                 os_free(wps);
 849                 return -1;
 850         }
 851         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 852         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 853         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 854         if (is_nil_uuid(wpa_s->conf->uuid)) {
 855                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 856                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 857                             wps->uuid, WPS_UUID_LEN);
 858         } else
 859                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 860
 861         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 862         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 863
 864         os_memset(&rcfg, 0, sizeof(rcfg));
 865         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 866         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 867         rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
 868         rcfg.cb_ctx = wpa_s;
 869
 870         wps->registrar = wps_registrar_init(wps, &rcfg);
 871         if (wps->registrar == NULL) {
 872                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 873                 os_free(wps);
 874                 return -1;
 875         }
 876
 877         wpa_s->wps = wps;
 878
 879         return 0;
 880 }
 881
 882
 883 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 884 {
 885         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 886
 887         if (wpa_s->wps == NULL)
 888                 return;
 889
 890 #ifdef CONFIG_WPS_ER
 891         wps_er_deinit(wpa_s->wps_er);
 892         wpa_s->wps_er = NULL;
 893 #endif /* CONFIG_WPS_ER */
 894
 895         wps_registrar_deinit(wpa_s->wps->registrar);
 896         wpabuf_free(wpa_s->wps->dh_pubkey);
 897         wpabuf_free(wpa_s->wps->dh_privkey);
 898         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
 899         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
 900         os_free(wpa_s->wps->network_key);
 901         os_free(wpa_s->wps);
 902         wpa_s->wps = NULL;
 903 }
 904
 905
 906 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
 907                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 908 {
 909         struct wpabuf *wps_ie;
 910
 911         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 912                 return -1;
 913
 914         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 915         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 916                 if (!wps_ie) {
 917                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 918                         return 0;
 919                 }
 920
 921                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 922                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 923                                    "without active PBC Registrar");
 924                         wpabuf_free(wps_ie);
 925                         return 0;
 926                 }
 927
 928                 /* TODO: overlap detection */
 929                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 930                            "(Active PBC)");
 931                 wpabuf_free(wps_ie);
 932                 return 1;
 933         }
 934
 935         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 936                 if (!wps_ie) {
 937                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 938                         return 0;
 939                 }
 940
 941                 /*
 942                  * Start with WPS APs that advertise active PIN Registrar and
 943                  * allow any WPS AP after third scan since some APs do not set
 944                  * Selected Registrar attribute properly when using external
 945                  * Registrar.
 946                  */
 947                 if (!wps_is_selected_pin_registrar(wps_ie)) {
 948                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
 949                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 950                                            "without active PIN Registrar");
 951                                 wpabuf_free(wps_ie);
 952                                 return 0;
 953                         }
 954                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 955                 } else {
 956                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 957                                    "(Active PIN)");
 958                 }
 959                 wpabuf_free(wps_ie);
 960                 return 1;
 961         }
 962
 963         if (wps_ie) {
 964                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 965                 wpabuf_free(wps_ie);
 966                 return 1;
 967         }
 968
 969         return -1;
 970 }
 971
 972
 973 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
 974                               struct wpa_ssid *ssid,
 975                               struct wpa_scan_res *bss)
 976 {
 977         struct wpabuf *wps_ie = NULL;
 978         int ret = 0;
 979
 980         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 981                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 982                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
 983                         /* allow wildcard SSID for WPS PBC */
 984                         ret = 1;
 985                 }
 986         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 987                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 988                 if (wps_ie &&
 989                     (wps_is_selected_pin_registrar(wps_ie) ||
 990                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
 991                         /* allow wildcard SSID for WPS PIN */
 992                         ret = 1;
 993                 }
 994         }
 995
 996         if (!ret && ssid->bssid_set &&
 997             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
 998                 /* allow wildcard SSID due to hardcoded BSSID match */
 999                 ret = 1;
1000         }
1001
1002         wpabuf_free(wps_ie);
1003
1004         return ret;
1005 }
1006
1007
1008 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
1009                               struct wpa_scan_res *selected,
1010                               struct wpa_ssid *ssid)
1011 {
1012         const u8 *sel_uuid, *uuid;
1013         size_t i;
1014         struct wpabuf *wps_ie;
1015         int ret = 0;
1016
1017         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
1018                 return 0;
1019
1020         /* Make sure that only one AP is in active PBC mode */
1021         wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
1022         if (wps_ie)
1023                 sel_uuid = wps_get_uuid_e(wps_ie);
1024         else
1025                 sel_uuid = NULL;
1026
1027         for (i = 0; i < wpa_s->scan_res->num; i++) {
1028                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
1029                 struct wpabuf *ie;
1030                 if (bss == selected)
1031                         continue;
1032                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1033                 if (!ie)
1034                         continue;
1035                 if (!wps_is_selected_pbc_registrar(ie)) {
1036                         wpabuf_free(ie);
1037                         continue;
1038                 }
1039                 uuid = wps_get_uuid_e(ie);
1040                 if (sel_uuid == NULL || uuid == NULL ||
1041                     os_memcmp(sel_uuid, uuid, 16) != 0) {
1042                         ret = 1; /* PBC overlap */
1043                         wpabuf_free(ie);
1044                         break;
1045                 }
1046
1047                 /* TODO: verify that this is reasonable dual-band situation */
1048
1049                 wpabuf_free(ie);
1050         }
1051
1052         wpabuf_free(wps_ie);
1053
1054         return ret;
1055 }
1056
1057
1058 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
1059 {
1060         size_t i;
1061
1062         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
1063                 return;
1064
1065         for (i = 0; i < wpa_s->scan_res->num; i++) {
1066                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
1067                 struct wpabuf *ie;
1068                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1069                 if (!ie)
1070                         continue;
1071                 if (wps_is_selected_pbc_registrar(ie))
1072                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
1073                 else if (wps_is_selected_pin_registrar(ie))
1074                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
1075                 else
1076                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
1077                 wpabuf_free(ie);
1078                 break;
1079         }
1080 }
1081
1082
1083 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
1084 {
1085         struct wpa_ssid *ssid;
1086
1087         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1088                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
1089                         return 1;
1090         }
1091
1092         return 0;
1093 }
1094
1095
1096 int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
1097                               char *end)
1098 {
1099         struct wpabuf *wps_ie;
1100         int ret;
1101
1102         wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
1103         if (wps_ie == NULL)
1104                 return 0;
1105
1106         ret = wps_attr_text(wps_ie, buf, end);
1107         wpabuf_free(wps_ie);
1108         return ret;
1109 }
1110
1111
1112 int wpas_wps_er_start(struct wpa_supplicant *wpa_s)
1113 {
1114 #ifdef CONFIG_WPS_ER
1115         if (wpa_s->wps_er) {
1116                 wps_er_refresh(wpa_s->wps_er);
1117                 return 0;
1118         }
1119         wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname);
1120         if (wpa_s->wps_er == NULL)
1121                 return -1;
1122         return 0;
1123 #else /* CONFIG_WPS_ER */
1124         return 0;
1125 #endif /* CONFIG_WPS_ER */
1126 }
1127
1128
1129 int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
1130 {
1131 #ifdef CONFIG_WPS_ER
1132         wps_er_deinit(wpa_s->wps_er);
1133         wpa_s->wps_er = NULL;
1134 #endif /* CONFIG_WPS_ER */
1135         return 0;
1136 }
1137
1138
1139 #ifdef CONFIG_WPS_ER
1140 int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const char *uuid,
1141                         const char *pin)
1142 {
1143         u8 u[UUID_LEN];
1144         int any = 0;
1145
1146         if (os_strcmp(uuid, "any") == 0)
1147                 any = 1;
1148         else if (uuid_str2bin(uuid, u))
1149                 return -1;
1150         return wps_registrar_add_pin(wpa_s->wps->registrar, any ? NULL : u,
1151                                      (const u8 *) pin, os_strlen(pin), 300);
1152 }
1153
1154
1155 int wpas_wps_er_pbc(struct wpa_supplicant *wpa_s, const char *uuid)
1156 {
1157         u8 u[UUID_LEN];
1158
1159         if (uuid_str2bin(uuid, u))
1160                 return -1;
1161         return wps_er_pbc(wpa_s->wps_er, u);
1162 }
1163
1164
1165 int wpas_wps_er_learn(struct wpa_supplicant *wpa_s, const char *uuid,
1166                       const char *pin)
1167 {
1168         u8 u[UUID_LEN];
1169
1170         if (uuid_str2bin(uuid, u))
1171                 return -1;
1172         return wps_er_learn(wpa_s->wps_er, u, (const u8 *) pin,
1173                             os_strlen(pin));
1174 }
1175 #endif /* CONFIG_WPS_ER */