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 "ieee802_11_defs.h"
  19 #include "ieee802_11_common.h"
  20 #include "wpa_common.h"
  21 #include "config.h"
  22 #include "eap_peer/eap.h"
  23 #include "wpa_supplicant_i.h"
  24 #include "driver_i.h"
  25 #include "eloop.h"
  26 #include "uuid.h"
  27 #include "wpa_ctrl.h"
  28 #include "notify.h"
  29 #include "eap_common/eap_wsc_common.h"
  30 #include "blacklist.h"
  31 #include "wpa.h"
  32 #include "wps_supplicant.h"
  33 #include "dh_group5.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         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 418         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s|%s|%s|%s|%s|%s|%s",
 419                 uuid_str,
 420                 ap->friendly_name ? ap->friendly_name : "",
 421                 ap->manufacturer ? ap->manufacturer : "",
 422                 ap->model_description ? ap->model_description : "",
 423                 ap->model_name ? ap->model_name : "",
 424                 ap->manufacturer_url ? ap->manufacturer_url : "",
 425                 ap->model_url ? ap->model_url : "");
 426 }
 427
 428
 429 static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
 430                                                   struct wps_event_er_ap *ap)
 431 {
 432         char uuid_str[100];
 433         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 434         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
 435 }
 436
 437
 438 static void wpa_supplicant_wps_event_er_enrollee_add(
 439         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 440 {
 441         char uuid_str[100];
 442         char dev_type[20];
 443
 444         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 445         if (enrollee->pri_dev_type)
 446                 os_snprintf(dev_type, sizeof(dev_type), "%u-%08X-%u",
 447                             WPA_GET_BE16(enrollee->pri_dev_type),
 448                             WPA_GET_BE32(enrollee->pri_dev_type + 2),
 449                             WPA_GET_BE16(enrollee->pri_dev_type + 6));
 450         else
 451                 dev_type[0] = '\0';
 452
 453         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
 454                 " M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
 455                 "|%s|%s|%s|%s|%s|",
 456                 uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
 457                 enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
 458                 enrollee->dev_name ? enrollee->dev_name : "",
 459                 enrollee->manufacturer ? enrollee->manufacturer : "",
 460                 enrollee->model_name ? enrollee->model_name : "",
 461                 enrollee->model_number ? enrollee->model_number : "",
 462                 enrollee->serial_number ? enrollee->serial_number : "");
 463 }
 464
 465
 466 static void wpa_supplicant_wps_event_er_enrollee_remove(
 467         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 468 {
 469         char uuid_str[100];
 470         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 471         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
 472                 uuid_str, MAC2STR(enrollee->mac_addr));
 473 }
 474
 475
 476 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 477                                      union wps_event_data *data)
 478 {
 479         struct wpa_supplicant *wpa_s = ctx;
 480         switch (event) {
 481         case WPS_EV_M2D:
 482                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 483                 break;
 484         case WPS_EV_FAIL:
 485                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 486                 break;
 487         case WPS_EV_SUCCESS:
 488                 wpa_supplicant_wps_event_success(wpa_s);
 489                 break;
 490         case WPS_EV_PWD_AUTH_FAIL:
 491                 break;
 492         case WPS_EV_PBC_OVERLAP:
 493                 break;
 494         case WPS_EV_PBC_TIMEOUT:
 495                 break;
 496         case WPS_EV_ER_AP_ADD:
 497                 wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
 498                 break;
 499         case WPS_EV_ER_AP_REMOVE:
 500                 wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
 501                 break;
 502         case WPS_EV_ER_ENROLLEE_ADD:
 503                 wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
 504                                                          &data->enrollee);
 505                 break;
 506         case WPS_EV_ER_ENROLLEE_REMOVE:
 507                 wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
 508                                                             &data->enrollee);
 509                 break;
 510         }
 511 }
 512
 513
 514 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 515 {
 516         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 517             eap_is_wps_pin_enrollee(&ssid->eap))
 518                 return WPS_REQ_ENROLLEE;
 519         else
 520                 return WPS_REQ_REGISTRAR;
 521 }
 522
 523
 524 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 525 {
 526         int id;
 527         struct wpa_ssid *ssid, *remove_ssid = NULL;
 528
 529         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 530
 531         /* Remove any existing WPS network from configuration */
 532         ssid = wpa_s->conf->ssid;
 533         while (ssid) {
 534                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 535                         if (ssid == wpa_s->current_ssid) {
 536                                 wpa_s->current_ssid = NULL;
 537                                 if (ssid != NULL)
 538                                         wpas_notify_network_changed(wpa_s);
 539                         }
 540                         id = ssid->id;
 541                         remove_ssid = ssid;
 542                 } else
 543                         id = -1;
 544                 ssid = ssid->next;
 545                 if (id >= 0) {
 546                         wpas_notify_network_removed(wpa_s, remove_ssid);
 547                         wpa_config_remove_network(wpa_s->conf, id);
 548                 }
 549         }
 550 }
 551
 552
 553 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 554 {
 555         struct wpa_supplicant *wpa_s = eloop_ctx;
 556         wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 557                    "out");
 558         wpas_clear_wps(wpa_s);
 559 }
 560
 561
 562 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 563                                               int registrar, const u8 *bssid)
 564 {
 565         struct wpa_ssid *ssid;
 566
 567         ssid = wpa_config_add_network(wpa_s->conf);
 568         if (ssid == NULL)
 569                 return NULL;
 570         wpas_notify_network_added(wpa_s, ssid);
 571         wpa_config_set_network_defaults(ssid);
 572         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 573             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 574             wpa_config_set(ssid, "identity", registrar ?
 575                            "\"" WSC_ID_REGISTRAR "\"" :
 576                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 577                 wpas_notify_network_removed(wpa_s, ssid);
 578                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 579                 return NULL;
 580         }
 581
 582         if (bssid) {
 583                 size_t i;
 584                 struct wpa_scan_res *res;
 585
 586                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 587                 ssid->bssid_set = 1;
 588
 589                 /* Try to get SSID from scan results */
 590                 if (wpa_s->scan_res == NULL &&
 591                     wpa_supplicant_get_scan_results(wpa_s) < 0)
 592                         return ssid; /* Could not find any scan results */
 593
 594                 for (i = 0; i < wpa_s->scan_res->num; i++) {
 595                         const u8 *ie;
 596
 597                         res = wpa_s->scan_res->res[i];
 598                         if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
 599                                 continue;
 600
 601                         ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 602                         if (ie == NULL)
 603                                 break;
 604                         os_free(ssid->ssid);
 605                         ssid->ssid = os_malloc(ie[1]);
 606                         if (ssid->ssid == NULL)
 607                                 break;
 608                         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 609                         ssid->ssid_len = ie[1];
 610                         break;
 611                 }
 612         }
 613
 614         return ssid;
 615 }
 616
 617
 618 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 619                              struct wpa_ssid *selected)
 620 {
 621         struct wpa_ssid *ssid;
 622
 623         /* Mark all other networks disabled and trigger reassociation */
 624         ssid = wpa_s->conf->ssid;
 625         while (ssid) {
 626                 int was_disabled = ssid->disabled;
 627                 ssid->disabled = ssid != selected;
 628                 if (was_disabled != ssid->disabled)
 629                         wpas_notify_network_enabled_changed(wpa_s, ssid);
 630                 ssid = ssid->next;
 631         }
 632         wpa_s->disconnected = 0;
 633         wpa_s->reassociate = 1;
 634         wpa_s->scan_runs = 0;
 635         wpa_s->wps_success = 0;
 636         wpa_s->blacklist_cleared = 0;
 637         wpa_supplicant_req_scan(wpa_s, 0, 0);
 638 }
 639
 640
 641 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 642 {
 643         struct wpa_ssid *ssid;
 644         wpas_clear_wps(wpa_s);
 645         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 646         if (ssid == NULL)
 647                 return -1;
 648         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 649         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 650                                wpa_s, NULL);
 651         wpas_wps_reassoc(wpa_s, ssid);
 652         return 0;
 653 }
 654
 655
 656 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 657                        const char *pin)
 658 {
 659         struct wpa_ssid *ssid;
 660         char val[128];
 661         unsigned int rpin = 0;
 662
 663         wpas_clear_wps(wpa_s);
 664         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 665         if (ssid == NULL)
 666                 return -1;
 667         if (pin)
 668                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 669         else {
 670                 rpin = wps_generate_pin();
 671                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 672         }
 673         wpa_config_set(ssid, "phase1", val, 0);
 674         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 675                                wpa_s, NULL);
 676         wpas_wps_reassoc(wpa_s, ssid);
 677         return rpin;
 678 }
 679
 680
 681 #ifdef CONFIG_WPS_OOB
 682 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 683                        char *path, char *method, char *name)
 684 {
 685         struct wps_context *wps = wpa_s->wps;
 686         struct oob_device_data *oob_dev;
 687
 688         oob_dev = wps_get_oob_device(device_type);
 689         if (oob_dev == NULL)
 690                 return -1;
 691         oob_dev->device_path = path;
 692         oob_dev->device_name = name;
 693         wps->oob_conf.oob_method = wps_get_oob_method(method);
 694
 695         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 696                 /*
 697                  * Use pre-configured DH keys in order to be able to write the
 698                  * key hash into the OOB file.
 699                  */
 700                 wpabuf_free(wps->dh_pubkey);
 701                 wpabuf_free(wps->dh_privkey);
 702                 wps->dh_privkey = NULL;
 703                 wps->dh_pubkey = NULL;
 704                 dh5_free(wps->dh_ctx);
 705                 wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
 706                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 707                 if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
 708                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 709                                    "Diffie-Hellman handshake");
 710                         return -1;
 711                 }
 712         }
 713
 714         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 715                 wpas_clear_wps(wpa_s);
 716
 717         if (wps_process_oob(wps, oob_dev, 0) < 0)
 718                 return -1;
 719
 720         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 721              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 722             wpas_wps_start_pin(wpa_s, NULL,
 723                                wpabuf_head(wps->oob_conf.dev_password)) < 0)
 724                         return -1;
 725
 726         return 0;
 727 }
 728 #endif /* CONFIG_WPS_OOB */
 729
 730
 731 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 732                        const char *pin, struct wps_new_ap_settings *settings)
 733 {
 734         struct wpa_ssid *ssid;
 735         char val[200];
 736         char *pos, *end;
 737         int res;
 738
 739         if (!pin)
 740                 return -1;
 741         wpas_clear_wps(wpa_s);
 742         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 743         if (ssid == NULL)
 744                 return -1;
 745         pos = val;
 746         end = pos + sizeof(val);
 747         res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
 748         if (res < 0 || res >= end - pos)
 749                 return -1;
 750         pos += res;
 751         if (settings) {
 752                 res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
 753                                   "new_encr=%s new_key=%s",
 754                                   settings->ssid_hex, settings->auth,
 755                                   settings->encr, settings->key_hex);
 756                 if (res < 0 || res >= end - pos)
 757                         return -1;
 758                 pos += res;
 759         }
 760         res = os_snprintf(pos, end - pos, "\"");
 761         if (res < 0 || res >= end - pos)
 762                 return -1;
 763         wpa_config_set(ssid, "phase1", val, 0);
 764         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 765                                wpa_s, NULL);
 766         wpas_wps_reassoc(wpa_s, ssid);
 767         return 0;
 768 }
 769
 770
 771 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 772                                size_t psk_len)
 773 {
 774         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 775                    "STA " MACSTR, MAC2STR(mac_addr));
 776         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 777
 778         /* TODO */
 779
 780         return 0;
 781 }
 782
 783
 784 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 785                                    const struct wps_device_data *dev)
 786 {
 787         char uuid[40], txt[400];
 788         int len;
 789         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 790                 return;
 791         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 792         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 793                           " [%s|%s|%s|%s|%s|%d-%08X-%d]",
 794                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 795                           dev->manufacturer, dev->model_name,
 796                           dev->model_number, dev->serial_number,
 797                           dev->categ, dev->oui, dev->sub_categ);
 798         if (len > 0 && len < (int) sizeof(txt))
 799                 wpa_printf(MSG_INFO, "%s", txt);
 800 }
 801
 802
 803 static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
 804                                     u16 sel_reg_config_methods)
 805 {
 806 #ifdef CONFIG_WPS_ER
 807         struct wpa_supplicant *wpa_s = ctx;
 808
 809         if (wpa_s->wps_er == NULL)
 810                 return;
 811         wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
 812                            sel_reg_config_methods);
 813 #endif /* CONFIG_WPS_ER */
 814 }
 815
 816
 817 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 818 {
 819         struct wps_context *wps;
 820         struct wps_registrar_config rcfg;
 821
 822         wps = os_zalloc(sizeof(*wps));
 823         if (wps == NULL)
 824                 return -1;
 825
 826         wps->cred_cb = wpa_supplicant_wps_cred;
 827         wps->event_cb = wpa_supplicant_wps_event;
 828         wps->cb_ctx = wpa_s;
 829
 830         wps->dev.device_name = wpa_s->conf->device_name;
 831         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 832         wps->dev.model_name = wpa_s->conf->model_name;
 833         wps->dev.model_number = wpa_s->conf->model_number;
 834         wps->dev.serial_number = wpa_s->conf->serial_number;
 835         if (wpa_s->conf->device_type) {
 836                 char *pos;
 837                 u8 oui[4];
 838                 /* <categ>-<OUI>-<subcateg> */
 839                 wps->dev.categ = atoi(wpa_s->conf->device_type);
 840                 pos = os_strchr(wpa_s->conf->device_type, '-');
 841                 if (pos == NULL) {
 842                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 843                         os_free(wps);
 844                         return -1;
 845                 }
 846                 pos++;
 847                 if (hexstr2bin(pos, oui, 4)) {
 848                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
 849                         os_free(wps);
 850                         return -1;
 851                 }
 852                 wps->dev.oui = WPA_GET_BE32(oui);
 853                 pos = os_strchr(pos, '-');
 854                 if (pos == NULL) {
 855                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 856                         os_free(wps);
 857                         return -1;
 858                 }
 859                 pos++;
 860                 wps->dev.sub_categ = atoi(pos);
 861         }
 862         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 863         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 864         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 865         if (is_nil_uuid(wpa_s->conf->uuid)) {
 866                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 867                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 868                             wps->uuid, WPS_UUID_LEN);
 869         } else
 870                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 871
 872         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 873         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 874
 875         os_memset(&rcfg, 0, sizeof(rcfg));
 876         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 877         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 878         rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
 879         rcfg.cb_ctx = wpa_s;
 880
 881         wps->registrar = wps_registrar_init(wps, &rcfg);
 882         if (wps->registrar == NULL) {
 883                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 884                 os_free(wps);
 885                 return -1;
 886         }
 887
 888         wpa_s->wps = wps;
 889
 890         return 0;
 891 }
 892
 893
 894 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 895 {
 896         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 897
 898         if (wpa_s->wps == NULL)
 899                 return;
 900
 901         wps_registrar_deinit(wpa_s->wps->registrar);
 902         wpabuf_free(wpa_s->wps->dh_pubkey);
 903         wpabuf_free(wpa_s->wps->dh_privkey);
 904         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
 905         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
 906         os_free(wpa_s->wps->network_key);
 907         os_free(wpa_s->wps);
 908         wpa_s->wps = NULL;
 909
 910 #ifdef CONFIG_WPS_ER
 911         wps_er_deinit(wpa_s->wps_er);
 912         wpa_s->wps_er = NULL;
 913 #endif /* CONFIG_WPS_ER */
 914 }
 915
 916
 917 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
 918                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 919 {
 920         struct wpabuf *wps_ie;
 921
 922         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 923                 return -1;
 924
 925         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 926         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 927                 if (!wps_ie) {
 928                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 929                         return 0;
 930                 }
 931
 932                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 933                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 934                                    "without active PBC Registrar");
 935                         wpabuf_free(wps_ie);
 936                         return 0;
 937                 }
 938
 939                 /* TODO: overlap detection */
 940                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 941                            "(Active PBC)");
 942                 wpabuf_free(wps_ie);
 943                 return 1;
 944         }
 945
 946         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 947                 if (!wps_ie) {
 948                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 949                         return 0;
 950                 }
 951
 952                 /*
 953                  * Start with WPS APs that advertise active PIN Registrar and
 954                  * allow any WPS AP after third scan since some APs do not set
 955                  * Selected Registrar attribute properly when using external
 956                  * Registrar.
 957                  */
 958                 if (!wps_is_selected_pin_registrar(wps_ie)) {
 959                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
 960                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 961                                            "without active PIN Registrar");
 962                                 wpabuf_free(wps_ie);
 963                                 return 0;
 964                         }
 965                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 966                 } else {
 967                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 968                                    "(Active PIN)");
 969                 }
 970                 wpabuf_free(wps_ie);
 971                 return 1;
 972         }
 973
 974         if (wps_ie) {
 975                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 976                 wpabuf_free(wps_ie);
 977                 return 1;
 978         }
 979
 980         return -1;
 981 }
 982
 983
 984 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
 985                               struct wpa_ssid *ssid,
 986                               struct wpa_scan_res *bss)
 987 {
 988         struct wpabuf *wps_ie = NULL;
 989         int ret = 0;
 990
 991         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 992                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 993                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
 994                         /* allow wildcard SSID for WPS PBC */
 995                         ret = 1;
 996                 }
 997         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 998                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 999                 if (wps_ie &&
1000                     (wps_is_selected_pin_registrar(wps_ie) ||
1001                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
1002                         /* allow wildcard SSID for WPS PIN */
1003                         ret = 1;
1004                 }
1005         }
1006
1007         if (!ret && ssid->bssid_set &&
1008             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
1009                 /* allow wildcard SSID due to hardcoded BSSID match */
1010                 ret = 1;
1011         }
1012
1013         wpabuf_free(wps_ie);
1014
1015         return ret;
1016 }
1017
1018
1019 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
1020                               struct wpa_scan_res *selected,
1021                               struct wpa_ssid *ssid)
1022 {
1023         const u8 *sel_uuid, *uuid;
1024         size_t i;
1025         struct wpabuf *wps_ie;
1026         int ret = 0;
1027
1028         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
1029                 return 0;
1030
1031         /* Make sure that only one AP is in active PBC mode */
1032         wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
1033         if (wps_ie)
1034                 sel_uuid = wps_get_uuid_e(wps_ie);
1035         else
1036                 sel_uuid = NULL;
1037
1038         for (i = 0; i < wpa_s->scan_res->num; i++) {
1039                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
1040                 struct wpabuf *ie;
1041                 if (bss == selected)
1042                         continue;
1043                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1044                 if (!ie)
1045                         continue;
1046                 if (!wps_is_selected_pbc_registrar(ie)) {
1047                         wpabuf_free(ie);
1048                         continue;
1049                 }
1050                 uuid = wps_get_uuid_e(ie);
1051                 if (sel_uuid == NULL || uuid == NULL ||
1052                     os_memcmp(sel_uuid, uuid, 16) != 0) {
1053                         ret = 1; /* PBC overlap */
1054                         wpabuf_free(ie);
1055                         break;
1056                 }
1057
1058                 /* TODO: verify that this is reasonable dual-band situation */
1059
1060                 wpabuf_free(ie);
1061         }
1062
1063         wpabuf_free(wps_ie);
1064
1065         return ret;
1066 }
1067
1068
1069 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
1070 {
1071         size_t i;
1072
1073         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
1074                 return;
1075
1076         for (i = 0; i < wpa_s->scan_res->num; i++) {
1077                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
1078                 struct wpabuf *ie;
1079                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1080                 if (!ie)
1081                         continue;
1082                 if (wps_is_selected_pbc_registrar(ie))
1083                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
1084                 else if (wps_is_selected_pin_registrar(ie))
1085                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
1086                 else
1087                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
1088                 wpabuf_free(ie);
1089                 break;
1090         }
1091 }
1092
1093
1094 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
1095 {
1096         struct wpa_ssid *ssid;
1097
1098         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1099                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
1100                         return 1;
1101         }
1102
1103         return 0;
1104 }
1105
1106
1107 int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
1108                               char *end)
1109 {
1110         struct wpabuf *wps_ie;
1111         int ret;
1112
1113         wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
1114         if (wps_ie == NULL)
1115                 return 0;
1116
1117         ret = wps_attr_text(wps_ie, buf, end);
1118         wpabuf_free(wps_ie);
1119         return ret;
1120 }
1121
1122
1123 int wpas_wps_er_start(struct wpa_supplicant *wpa_s)
1124 {
1125 #ifdef CONFIG_WPS_ER
1126         if (wpa_s->wps_er) {
1127                 /* TODO: re-send ctrl_iface events for current data? */
1128                 return 0;
1129         }
1130         wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname);
1131         if (wpa_s->wps_er == NULL)
1132                 return -1;
1133         return 0;
1134 #else /* CONFIG_WPS_ER */
1135         return 0;
1136 #endif /* CONFIG_WPS_ER */
1137 }
1138
1139
1140 int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
1141 {
1142 #ifdef CONFIG_WPS_ER
1143         wps_er_deinit(wpa_s->wps_er);
1144         wpa_s->wps_er = NULL;
1145 #endif /* CONFIG_WPS_ER */
1146         return 0;
1147 }
1148
1149
1150 #ifdef CONFIG_WPS_ER
1151 int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const char *uuid,
1152                         const char *pin)
1153 {
1154         u8 u[UUID_LEN];
1155         int any = 0;
1156
1157         if (os_strcmp(uuid, "any") == 0)
1158                 any = 1;
1159         else if (uuid_str2bin(uuid, u))
1160                 return -1;
1161         return wps_registrar_add_pin(wpa_s->wps->registrar, any ? NULL : u,
1162                                      (const u8 *) pin, os_strlen(pin), 300);
1163 }
1164 #endif /* CONFIG_WPS_ER */