www.project-moonshot.org Git - mech_eap.orig/blob - 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         char dev_type[20];
 418
 419         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 420         if (ap->pri_dev_type)
 421                 os_snprintf(dev_type, sizeof(dev_type), "%u-%08X-%u",
 422                             WPA_GET_BE16(ap->pri_dev_type),
 423                             WPA_GET_BE32(ap->pri_dev_type + 2),
 424                             WPA_GET_BE16(ap->pri_dev_type + 6));
 425         else
 426                 dev_type[0] = '\0';
 427
 428         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s " MACSTR
 429                 " pri_dev_type=%s wps_state=%d |%s|%s|%s|%s|%s|%s|",
 430                 uuid_str, MAC2STR(ap->mac_addr), dev_type, ap->wps_state,
 431                 ap->friendly_name ? ap->friendly_name : "",
 432                 ap->manufacturer ? ap->manufacturer : "",
 433                 ap->model_description ? ap->model_description : "",
 434                 ap->model_name ? ap->model_name : "",
 435                 ap->manufacturer_url ? ap->manufacturer_url : "",
 436                 ap->model_url ? ap->model_url : "");
 437 }
 438
 439
 440 static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
 441                                                   struct wps_event_er_ap *ap)
 442 {
 443         char uuid_str[100];
 444         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 445         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
 446 }
 447
 448
 449 static void wpa_supplicant_wps_event_er_enrollee_add(
 450         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 451 {
 452         char uuid_str[100];
 453         char dev_type[20];
 454
 455         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 456         if (enrollee->pri_dev_type)
 457                 os_snprintf(dev_type, sizeof(dev_type), "%u-%08X-%u",
 458                             WPA_GET_BE16(enrollee->pri_dev_type),
 459                             WPA_GET_BE32(enrollee->pri_dev_type + 2),
 460                             WPA_GET_BE16(enrollee->pri_dev_type + 6));
 461         else
 462                 dev_type[0] = '\0';
 463
 464         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
 465                 " M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
 466                 "|%s|%s|%s|%s|%s|",
 467                 uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
 468                 enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
 469                 enrollee->dev_name ? enrollee->dev_name : "",
 470                 enrollee->manufacturer ? enrollee->manufacturer : "",
 471                 enrollee->model_name ? enrollee->model_name : "",
 472                 enrollee->model_number ? enrollee->model_number : "",
 473                 enrollee->serial_number ? enrollee->serial_number : "");
 474 }
 475
 476
 477 static void wpa_supplicant_wps_event_er_enrollee_remove(
 478         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 479 {
 480         char uuid_str[100];
 481         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 482         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
 483                 uuid_str, MAC2STR(enrollee->mac_addr));
 484 }
 485
 486
 487 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 488                                      union wps_event_data *data)
 489 {
 490         struct wpa_supplicant *wpa_s = ctx;
 491         switch (event) {
 492         case WPS_EV_M2D:
 493                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 494                 break;
 495         case WPS_EV_FAIL:
 496                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 497                 break;
 498         case WPS_EV_SUCCESS:
 499                 wpa_supplicant_wps_event_success(wpa_s);
 500                 break;
 501         case WPS_EV_PWD_AUTH_FAIL:
 502                 break;
 503         case WPS_EV_PBC_OVERLAP:
 504                 break;
 505         case WPS_EV_PBC_TIMEOUT:
 506                 break;
 507         case WPS_EV_ER_AP_ADD:
 508                 wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
 509                 break;
 510         case WPS_EV_ER_AP_REMOVE:
 511                 wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
 512                 break;
 513         case WPS_EV_ER_ENROLLEE_ADD:
 514                 wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
 515                                                          &data->enrollee);
 516                 break;
 517         case WPS_EV_ER_ENROLLEE_REMOVE:
 518                 wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
 519                                                             &data->enrollee);
 520                 break;
 521         }
 522 }
 523
 524
 525 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 526 {
 527         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 528             eap_is_wps_pin_enrollee(&ssid->eap))
 529                 return WPS_REQ_ENROLLEE;
 530         else
 531                 return WPS_REQ_REGISTRAR;
 532 }
 533
 534
 535 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 536 {
 537         int id;
 538         struct wpa_ssid *ssid, *remove_ssid = NULL;
 539
 540         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 541
 542         /* Remove any existing WPS network from configuration */
 543         ssid = wpa_s->conf->ssid;
 544         while (ssid) {
 545                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 546                         if (ssid == wpa_s->current_ssid) {
 547                                 wpa_s->current_ssid = NULL;
 548                                 if (ssid != NULL)
 549                                         wpas_notify_network_changed(wpa_s);
 550                         }
 551                         id = ssid->id;
 552                         remove_ssid = ssid;
 553                 } else
 554                         id = -1;
 555                 ssid = ssid->next;
 556                 if (id >= 0) {
 557                         wpas_notify_network_removed(wpa_s, remove_ssid);
 558                         wpa_config_remove_network(wpa_s->conf, id);
 559                 }
 560         }
 561 }
 562
 563
 564 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 565 {
 566         struct wpa_supplicant *wpa_s = eloop_ctx;
 567         wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 568                    "out");
 569         wpas_clear_wps(wpa_s);
 570 }
 571
 572
 573 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 574                                               int registrar, const u8 *bssid)
 575 {
 576         struct wpa_ssid *ssid;
 577
 578         ssid = wpa_config_add_network(wpa_s->conf);
 579         if (ssid == NULL)
 580                 return NULL;
 581         wpas_notify_network_added(wpa_s, ssid);
 582         wpa_config_set_network_defaults(ssid);
 583         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 584             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 585             wpa_config_set(ssid, "identity", registrar ?
 586                            "\"" WSC_ID_REGISTRAR "\"" :
 587                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 588                 wpas_notify_network_removed(wpa_s, ssid);
 589                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 590                 return NULL;
 591         }
 592
 593         if (bssid) {
 594                 size_t i;
 595                 struct wpa_scan_res *res;
 596
 597                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 598                 ssid->bssid_set = 1;
 599
 600                 /* Try to get SSID from scan results */
 601                 if (wpa_s->scan_res == NULL &&
 602                     wpa_supplicant_get_scan_results(wpa_s) < 0)
 603                         return ssid; /* Could not find any scan results */
 604
 605                 for (i = 0; i < wpa_s->scan_res->num; i++) {
 606                         const u8 *ie;
 607
 608                         res = wpa_s->scan_res->res[i];
 609                         if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
 610                                 continue;
 611
 612                         ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 613                         if (ie == NULL)
 614                                 break;
 615                         os_free(ssid->ssid);
 616                         ssid->ssid = os_malloc(ie[1]);
 617                         if (ssid->ssid == NULL)
 618                                 break;
 619                         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 620                         ssid->ssid_len = ie[1];
 621                         break;
 622                 }
 623         }
 624
 625         return ssid;
 626 }
 627
 628
 629 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 630                              struct wpa_ssid *selected)
 631 {
 632         struct wpa_ssid *ssid;
 633
 634         /* Mark all other networks disabled and trigger reassociation */
 635         ssid = wpa_s->conf->ssid;
 636         while (ssid) {
 637                 int was_disabled = ssid->disabled;
 638                 ssid->disabled = ssid != selected;
 639                 if (was_disabled != ssid->disabled)
 640                         wpas_notify_network_enabled_changed(wpa_s, ssid);
 641                 ssid = ssid->next;
 642         }
 643         wpa_s->disconnected = 0;
 644         wpa_s->reassociate = 1;
 645         wpa_s->scan_runs = 0;
 646         wpa_s->wps_success = 0;
 647         wpa_s->blacklist_cleared = 0;
 648         wpa_supplicant_req_scan(wpa_s, 0, 0);
 649 }
 650
 651
 652 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 653 {
 654         struct wpa_ssid *ssid;
 655         wpas_clear_wps(wpa_s);
 656         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 657         if (ssid == NULL)
 658                 return -1;
 659         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 660         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 661                                wpa_s, NULL);
 662         wpas_wps_reassoc(wpa_s, ssid);
 663         return 0;
 664 }
 665
 666
 667 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 668                        const char *pin)
 669 {
 670         struct wpa_ssid *ssid;
 671         char val[128];
 672         unsigned int rpin = 0;
 673
 674         wpas_clear_wps(wpa_s);
 675         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 676         if (ssid == NULL)
 677                 return -1;
 678         if (pin)
 679                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 680         else {
 681                 rpin = wps_generate_pin();
 682                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 683         }
 684         wpa_config_set(ssid, "phase1", val, 0);
 685         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 686                                wpa_s, NULL);
 687         wpas_wps_reassoc(wpa_s, ssid);
 688         return rpin;
 689 }
 690
 691
 692 #ifdef CONFIG_WPS_OOB
 693 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 694                        char *path, char *method, char *name)
 695 {
 696         struct wps_context *wps = wpa_s->wps;
 697         struct oob_device_data *oob_dev;
 698
 699         oob_dev = wps_get_oob_device(device_type);
 700         if (oob_dev == NULL)
 701                 return -1;
 702         oob_dev->device_path = path;
 703         oob_dev->device_name = name;
 704         wps->oob_conf.oob_method = wps_get_oob_method(method);
 705
 706         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 707                 /*
 708                  * Use pre-configured DH keys in order to be able to write the
 709                  * key hash into the OOB file.
 710                  */
 711                 wpabuf_free(wps->dh_pubkey);
 712                 wpabuf_free(wps->dh_privkey);
 713                 wps->dh_privkey = NULL;
 714                 wps->dh_pubkey = NULL;
 715                 dh5_free(wps->dh_ctx);
 716                 wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
 717                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 718                 if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
 719                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 720                                    "Diffie-Hellman handshake");
 721                         return -1;
 722                 }
 723         }
 724
 725         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 726                 wpas_clear_wps(wpa_s);
 727
 728         if (wps_process_oob(wps, oob_dev, 0) < 0)
 729                 return -1;
 730
 731         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 732              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 733             wpas_wps_start_pin(wpa_s, NULL,
 734                                wpabuf_head(wps->oob_conf.dev_password)) < 0)
 735                         return -1;
 736
 737         return 0;
 738 }
 739 #endif /* CONFIG_WPS_OOB */
 740
 741
 742 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 743                        const char *pin, struct wps_new_ap_settings *settings)
 744 {
 745         struct wpa_ssid *ssid;
 746         char val[200];
 747         char *pos, *end;
 748         int res;
 749
 750         if (!pin)
 751                 return -1;
 752         wpas_clear_wps(wpa_s);
 753         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 754         if (ssid == NULL)
 755                 return -1;
 756         pos = val;
 757         end = pos + sizeof(val);
 758         res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
 759         if (res < 0 || res >= end - pos)
 760                 return -1;
 761         pos += res;
 762         if (settings) {
 763                 res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
 764                                   "new_encr=%s new_key=%s",
 765                                   settings->ssid_hex, settings->auth,
 766                                   settings->encr, settings->key_hex);
 767                 if (res < 0 || res >= end - pos)
 768                         return -1;
 769                 pos += res;
 770         }
 771         res = os_snprintf(pos, end - pos, "\"");
 772         if (res < 0 || res >= end - pos)
 773                 return -1;
 774         wpa_config_set(ssid, "phase1", val, 0);
 775         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 776                                wpa_s, NULL);
 777         wpas_wps_reassoc(wpa_s, ssid);
 778         return 0;
 779 }
 780
 781
 782 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 783                                size_t psk_len)
 784 {
 785         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 786                    "STA " MACSTR, MAC2STR(mac_addr));
 787         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 788
 789         /* TODO */
 790
 791         return 0;
 792 }
 793
 794
 795 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 796                                    const struct wps_device_data *dev)
 797 {
 798         char uuid[40], txt[400];
 799         int len;
 800         char devtype[WPS_DEV_TYPE_BUFSIZE];
 801         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 802                 return;
 803         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 804         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 805                           " [%s|%s|%s|%s|%s|%s]",
 806                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 807                           dev->manufacturer, dev->model_name,
 808                           dev->model_number, dev->serial_number,
 809                           wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 810                                                sizeof(devtype)));
 811         if (len > 0 && len < (int) sizeof(txt))
 812                 wpa_printf(MSG_INFO, "%s", txt);
 813 }
 814
 815
 816 static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
 817                                     u16 sel_reg_config_methods)
 818 {
 819 #ifdef CONFIG_WPS_ER
 820         struct wpa_supplicant *wpa_s = ctx;
 821
 822         if (wpa_s->wps_er == NULL)
 823                 return;
 824         wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
 825                            sel_reg_config_methods);
 826 #endif /* CONFIG_WPS_ER */
 827 }
 828
 829
 830 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 831 {
 832         struct wps_context *wps;
 833         struct wps_registrar_config rcfg;
 834
 835         wps = os_zalloc(sizeof(*wps));
 836         if (wps == NULL)
 837                 return -1;
 838
 839         wps->cred_cb = wpa_supplicant_wps_cred;
 840         wps->event_cb = wpa_supplicant_wps_event;
 841         wps->cb_ctx = wpa_s;
 842
 843         wps->dev.device_name = wpa_s->conf->device_name;
 844         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 845         wps->dev.model_name = wpa_s->conf->model_name;
 846         wps->dev.model_number = wpa_s->conf->model_number;
 847         wps->dev.serial_number = wpa_s->conf->serial_number;
 848         if (wpa_s->conf->device_type &&
 849             wps_dev_type_str2bin(wpa_s->conf->device_type,
 850                                  wps->dev.pri_dev_type) < 0) {
 851                 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 852                 os_free(wps);
 853                 return -1;
 854         }
 855         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 856         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 857         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 858         if (is_nil_uuid(wpa_s->conf->uuid)) {
 859                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 860                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 861                             wps->uuid, WPS_UUID_LEN);
 862         } else
 863                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 864
 865         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 866         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 867
 868         os_memset(&rcfg, 0, sizeof(rcfg));
 869         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 870         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 871         rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
 872         rcfg.cb_ctx = wpa_s;
 873
 874         wps->registrar = wps_registrar_init(wps, &rcfg);
 875         if (wps->registrar == NULL) {
 876                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 877                 os_free(wps);
 878                 return -1;
 879         }
 880
 881         wpa_s->wps = wps;
 882
 883         return 0;
 884 }
 885
 886
 887 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 888 {
 889         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 890
 891         if (wpa_s->wps == NULL)
 892                 return;
 893
 894 #ifdef CONFIG_WPS_ER
 895         wps_er_deinit(wpa_s->wps_er);
 896         wpa_s->wps_er = NULL;
 897 #endif /* CONFIG_WPS_ER */
 898
 899         wps_registrar_deinit(wpa_s->wps->registrar);
 900         wpabuf_free(wpa_s->wps->dh_pubkey);
 901         wpabuf_free(wpa_s->wps->dh_privkey);
 902         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
 903         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
 904         os_free(wpa_s->wps->network_key);
 905         os_free(wpa_s->wps);
 906         wpa_s->wps = NULL;
 907 }
 908
 909
 910 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
 911                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 912 {
 913         struct wpabuf *wps_ie;
 914
 915         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 916                 return -1;
 917
 918         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 919         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 920                 if (!wps_ie) {
 921                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 922                         return 0;
 923                 }
 924
 925                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 926                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 927                                    "without active PBC Registrar");
 928                         wpabuf_free(wps_ie);
 929                         return 0;
 930                 }
 931
 932                 /* TODO: overlap detection */
 933                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 934                            "(Active PBC)");
 935                 wpabuf_free(wps_ie);
 936                 return 1;
 937         }
 938
 939         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 940                 if (!wps_ie) {
 941                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 942                         return 0;
 943                 }
 944
 945                 /*
 946                  * Start with WPS APs that advertise active PIN Registrar and
 947                  * allow any WPS AP after third scan since some APs do not set
 948                  * Selected Registrar attribute properly when using external
 949                  * Registrar.
 950                  */
 951                 if (!wps_is_selected_pin_registrar(wps_ie)) {
 952                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
 953                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 954                                            "without active PIN Registrar");
 955                                 wpabuf_free(wps_ie);
 956                                 return 0;
 957                         }
 958                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 959                 } else {
 960                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 961                                    "(Active PIN)");
 962                 }
 963                 wpabuf_free(wps_ie);
 964                 return 1;
 965         }
 966
 967         if (wps_ie) {
 968                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 969                 wpabuf_free(wps_ie);
 970                 return 1;
 971         }
 972
 973         return -1;
 974 }
 975
 976
 977 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
 978                               struct wpa_ssid *ssid,
 979                               struct wpa_scan_res *bss)
 980 {
 981         struct wpabuf *wps_ie = NULL;
 982         int ret = 0;
 983
 984         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 985                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 986                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
 987                         /* allow wildcard SSID for WPS PBC */
 988                         ret = 1;
 989                 }
 990         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 991                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 992                 if (wps_ie &&
 993                     (wps_is_selected_pin_registrar(wps_ie) ||
 994                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
 995                         /* allow wildcard SSID for WPS PIN */
 996                         ret = 1;
 997                 }
 998         }
 999
1000         if (!ret && ssid->bssid_set &&
1001             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
1002                 /* allow wildcard SSID due to hardcoded BSSID match */
1003                 ret = 1;
1004         }
1005
1006         wpabuf_free(wps_ie);
1007
1008         return ret;
1009 }
1010
1011
1012 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
1013                               struct wpa_scan_res *selected,
1014                               struct wpa_ssid *ssid)
1015 {
1016         const u8 *sel_uuid, *uuid;
1017         size_t i;
1018         struct wpabuf *wps_ie;
1019         int ret = 0;
1020
1021         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
1022                 return 0;
1023
1024         /* Make sure that only one AP is in active PBC mode */
1025         wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
1026         if (wps_ie)
1027                 sel_uuid = wps_get_uuid_e(wps_ie);
1028         else
1029                 sel_uuid = NULL;
1030
1031         for (i = 0; i < wpa_s->scan_res->num; i++) {
1032                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
1033                 struct wpabuf *ie;
1034                 if (bss == selected)
1035                         continue;
1036                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1037                 if (!ie)
1038                         continue;
1039                 if (!wps_is_selected_pbc_registrar(ie)) {
1040                         wpabuf_free(ie);
1041                         continue;
1042                 }
1043                 uuid = wps_get_uuid_e(ie);
1044                 if (sel_uuid == NULL || uuid == NULL ||
1045                     os_memcmp(sel_uuid, uuid, 16) != 0) {
1046                         ret = 1; /* PBC overlap */
1047                         wpabuf_free(ie);
1048                         break;
1049                 }
1050
1051                 /* TODO: verify that this is reasonable dual-band situation */
1052
1053                 wpabuf_free(ie);
1054         }
1055
1056         wpabuf_free(wps_ie);
1057
1058         return ret;
1059 }
1060
1061
1062 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
1063 {
1064         size_t i;
1065
1066         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
1067                 return;
1068
1069         for (i = 0; i < wpa_s->scan_res->num; i++) {
1070                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
1071                 struct wpabuf *ie;
1072                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1073                 if (!ie)
1074                         continue;
1075                 if (wps_is_selected_pbc_registrar(ie))
1076                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
1077                 else if (wps_is_selected_pin_registrar(ie))
1078                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
1079                 else
1080                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
1081                 wpabuf_free(ie);
1082                 break;
1083         }
1084 }
1085
1086
1087 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
1088 {
1089         struct wpa_ssid *ssid;
1090
1091         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1092                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
1093                         return 1;
1094         }
1095
1096         return 0;
1097 }
1098
1099
1100 int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
1101                               char *end)
1102 {
1103         struct wpabuf *wps_ie;
1104         int ret;
1105
1106         wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
1107         if (wps_ie == NULL)
1108                 return 0;
1109
1110         ret = wps_attr_text(wps_ie, buf, end);
1111         wpabuf_free(wps_ie);
1112         return ret;
1113 }
1114
1115
1116 int wpas_wps_er_start(struct wpa_supplicant *wpa_s)
1117 {
1118 #ifdef CONFIG_WPS_ER
1119         if (wpa_s->wps_er) {
1120                 wps_er_refresh(wpa_s->wps_er);
1121                 return 0;
1122         }
1123         wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname);
1124         if (wpa_s->wps_er == NULL)
1125                 return -1;
1126         return 0;
1127 #else /* CONFIG_WPS_ER */
1128         return 0;
1129 #endif /* CONFIG_WPS_ER */
1130 }
1131
1132
1133 int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
1134 {
1135 #ifdef CONFIG_WPS_ER
1136         wps_er_deinit(wpa_s->wps_er);
1137         wpa_s->wps_er = NULL;
1138 #endif /* CONFIG_WPS_ER */
1139         return 0;
1140 }
1141
1142
1143 #ifdef CONFIG_WPS_ER
1144 int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const char *uuid,
1145                         const char *pin)
1146 {
1147         u8 u[UUID_LEN];
1148         int any = 0;
1149
1150         if (os_strcmp(uuid, "any") == 0)
1151                 any = 1;
1152         else if (uuid_str2bin(uuid, u))
1153                 return -1;
1154         return wps_registrar_add_pin(wpa_s->wps->registrar, any ? NULL : u,
1155                                      (const u8 *) pin, os_strlen(pin), 300);
1156 }
1157
1158
1159 int wpas_wps_er_pbc(struct wpa_supplicant *wpa_s, const char *uuid)
1160 {
1161         u8 u[UUID_LEN];
1162
1163         if (uuid_str2bin(uuid, u))
1164                 return -1;
1165         return wps_er_pbc(wpa_s->wps_er, u);
1166 }
1167
1168
1169 int wpas_wps_er_learn(struct wpa_supplicant *wpa_s, const char *uuid,
1170                       const char *pin)
1171 {
1172         u8 u[UUID_LEN];
1173
1174         if (uuid_str2bin(uuid, u))
1175                 return -1;
1176         return wps_er_learn(wpa_s->wps_er, u, (const u8 *) pin,
1177                             os_strlen(pin));
1178 }
1179 #endif /* CONFIG_WPS_ER */