vcs.maemo.org Git - wpasupplicant/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 "wpa_common.h"
  20 #include "config.h"
  21 #include "eap_peer/eap.h"
  22 #include "wpa_supplicant_i.h"
  23 #include "driver_i.h"
  24 #include "eloop.h"
  25 #include "uuid.h"
  26 #include "wpa_ctrl.h"
  27 #include "ctrl_iface_dbus.h"
  28 #include "eap_common/eap_wsc_common.h"
  29 #include "blacklist.h"
  30 #include "wpa.h"
  31 #include "wps_supplicant.h"
  32 #include "dh_groups.h"
  33
  34 #define WPS_PIN_SCAN_IGNORE_SEL_REG 3
  35
  36 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
  37 static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
  38
  39
  40 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
  41 {
  42         if (!wpa_s->wps_success &&
  43             wpa_s->current_ssid &&
  44             eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
  45                 const u8 *bssid = wpa_s->bssid;
  46                 if (is_zero_ether_addr(bssid))
  47                         bssid = wpa_s->pending_bssid;
  48
  49                 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
  50                            " did not succeed - continue trying to find "
  51                            "suitable AP", MAC2STR(bssid));
  52                 wpa_blacklist_add(wpa_s, bssid);
  53
  54                 wpa_supplicant_deauthenticate(wpa_s,
  55                                               WLAN_REASON_DEAUTH_LEAVING);
  56                 wpa_s->reassociate = 1;
  57                 wpa_supplicant_req_scan(wpa_s,
  58                                         wpa_s->blacklist_cleared ? 5 : 0, 0);
  59                 wpa_s->blacklist_cleared = 0;
  60                 return 1;
  61         }
  62
  63         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
  64
  65         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
  66             !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
  67                 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
  68                            "try to associate with the received credential");
  69                 wpa_supplicant_deauthenticate(wpa_s,
  70                                               WLAN_REASON_DEAUTH_LEAVING);
  71                 wpa_s->reassociate = 1;
  72                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  73                 return 1;
  74         }
  75
  76         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
  77                 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
  78                            "for external credential processing");
  79                 wpas_clear_wps(wpa_s);
  80                 wpa_supplicant_deauthenticate(wpa_s,
  81                                               WLAN_REASON_DEAUTH_LEAVING);
  82                 return 1;
  83         }
  84
  85         return 0;
  86 }
  87
  88
  89 static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
  90                                          struct wpa_ssid *ssid,
  91                                          const struct wps_credential *cred)
  92 {
  93         struct wpa_driver_capa capa;
  94         size_t i;
  95         struct wpa_scan_res *bss;
  96         const u8 *ie;
  97         struct wpa_ie_data adv;
  98         int wpa2 = 0, ccmp = 0;
  99
 100         /*
 101          * Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
 102          * case they are configured for mixed mode operation (WPA+WPA2 and
 103          * TKIP+CCMP). Try to use scan results to figure out whether the AP
 104          * actually supports stronger security and select that if the client
 105          * has support for it, too.
 106          */
 107
 108         if (wpa_drv_get_capa(wpa_s, &capa))
 109                 return; /* Unknown what driver supports */
 110
 111         if (wpa_supplicant_get_scan_results(wpa_s) || wpa_s->scan_res == NULL)
 112                 return; /* Could not get scan results for checking advertised
 113                          * parameters */
 114
 115         for (i = 0; i < wpa_s->scan_res->num; i++) {
 116                 bss = wpa_s->scan_res->res[i];
 117                 if (os_memcmp(bss->bssid, cred->mac_addr, ETH_ALEN) != 0)
 118                         continue;
 119                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 120                 if (ie == NULL)
 121                         continue;
 122                 if (ie[1] != ssid->ssid_len || ssid->ssid == NULL ||
 123                     os_memcmp(ie + 2, ssid->ssid, ssid->ssid_len) != 0)
 124                         continue;
 125
 126                 wpa_printf(MSG_DEBUG, "WPS: AP found from scan results");
 127                 break;
 128         }
 129
 130         if (i == wpa_s->scan_res->num) {
 131                 wpa_printf(MSG_DEBUG, "WPS: The AP was not found from scan "
 132                            "results - use credential as-is");
 133                 return;
 134         }
 135
 136         ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 137         if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
 138                 wpa2 = 1;
 139                 if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
 140                         ccmp = 1;
 141         } else {
 142                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 143                 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
 144                     adv.pairwise_cipher & WPA_CIPHER_CCMP)
 145                         ccmp = 1;
 146         }
 147
 148         if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
 149             (ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
 150                 /*
 151                  * TODO: This could be the initial AP configuration and the
 152                  * Beacon contents could change shortly. Should request a new
 153                  * scan and delay addition of the network until the updated
 154                  * scan results are available.
 155                  */
 156                 wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
 157                            "support - use credential as-is");
 158                 return;
 159         }
 160
 161         if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 162             (ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
 163             (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
 164                 wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
 165                            "based on scan results");
 166                 if (wpa_s->conf->ap_scan == 1)
 167                         ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
 168                 else
 169                         ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 170         }
 171
 172         if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
 173             (ssid->proto & WPA_PROTO_WPA) &&
 174             (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
 175                 wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
 176                            "based on scan results");
 177                 if (wpa_s->conf->ap_scan == 1)
 178                         ssid->proto |= WPA_PROTO_RSN;
 179                 else
 180                         ssid->proto = WPA_PROTO_RSN;
 181         }
 182 }
 183
 184
 185 static int wpa_supplicant_wps_cred(void *ctx,
 186                                    const struct wps_credential *cred)
 187 {
 188         struct wpa_supplicant *wpa_s = ctx;
 189         struct wpa_ssid *ssid = wpa_s->current_ssid;
 190         u8 key_idx = 0;
 191
 192         if ((wpa_s->conf->wps_cred_processing == 1 ||
 193              wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) {
 194                 size_t blen = cred->cred_attr_len * 2 + 1;
 195                 char *buf = os_malloc(blen);
 196                 if (buf) {
 197                         wpa_snprintf_hex(buf, blen,
 198                                          cred->cred_attr, cred->cred_attr_len);
 199                         wpa_msg(wpa_s, MSG_INFO, "%s%s",
 200                                 WPS_EVENT_CRED_RECEIVED, buf);
 201                         os_free(buf);
 202                 }
 203                 wpa_supplicant_dbus_notify_wps_cred(wpa_s, cred);
 204         } else
 205                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
 206
 207         wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
 208                         cred->cred_attr, cred->cred_attr_len);
 209
 210         if (wpa_s->conf->wps_cred_processing == 1)
 211                 return 0;
 212
 213         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
 214         wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
 215                    cred->auth_type);
 216         wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
 217         wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
 218         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
 219                         cred->key, cred->key_len);
 220         wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
 221                    MAC2STR(cred->mac_addr));
 222
 223         if (cred->auth_type != WPS_AUTH_OPEN &&
 224             cred->auth_type != WPS_AUTH_SHARED &&
 225             cred->auth_type != WPS_AUTH_WPAPSK &&
 226             cred->auth_type != WPS_AUTH_WPA2PSK) {
 227                 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
 228                            "unsupported authentication type %d",
 229                            cred->auth_type);
 230                 return 0;
 231         }
 232
 233         if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 234                 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
 235                            "on the received credential");
 236                 os_free(ssid->eap.identity);
 237                 ssid->eap.identity = NULL;
 238                 ssid->eap.identity_len = 0;
 239                 os_free(ssid->eap.phase1);
 240                 ssid->eap.phase1 = NULL;
 241                 os_free(ssid->eap.eap_methods);
 242                 ssid->eap.eap_methods = NULL;
 243         } else {
 244                 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
 245                            "received credential");
 246                 ssid = wpa_config_add_network(wpa_s->conf);
 247                 if (ssid == NULL)
 248                         return -1;
 249         }
 250
 251         wpa_config_set_network_defaults(ssid);
 252
 253         os_free(ssid->ssid);
 254         ssid->ssid = os_malloc(cred->ssid_len);
 255         if (ssid->ssid) {
 256                 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
 257                 ssid->ssid_len = cred->ssid_len;
 258         }
 259
 260         switch (cred->encr_type) {
 261         case WPS_ENCR_NONE:
 262                 break;
 263         case WPS_ENCR_WEP:
 264                 if (cred->key_len <= 0)
 265                         break;
 266                 if (cred->key_len != 5 && cred->key_len != 13 &&
 267                     cred->key_len != 10 && cred->key_len != 26) {
 268                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
 269                                    "%lu", (unsigned long) cred->key_len);
 270                         return -1;
 271                 }
 272                 if (cred->key_idx > NUM_WEP_KEYS) {
 273                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
 274                                    cred->key_idx);
 275                         return -1;
 276                 }
 277                 if (cred->key_idx)
 278                         key_idx = cred->key_idx - 1;
 279                 if (cred->key_len == 10 || cred->key_len == 26) {
 280                         if (hexstr2bin((char *) cred->key,
 281                                        ssid->wep_key[key_idx],
 282                                        cred->key_len / 2) < 0) {
 283                                 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
 284                                            "%d", key_idx);
 285                                 return -1;
 286                         }
 287                         ssid->wep_key_len[key_idx] = cred->key_len / 2;
 288                 } else {
 289                         os_memcpy(ssid->wep_key[key_idx], cred->key,
 290                                   cred->key_len);
 291                         ssid->wep_key_len[key_idx] = cred->key_len;
 292                 }
 293                 ssid->wep_tx_keyidx = key_idx;
 294                 break;
 295         case WPS_ENCR_TKIP:
 296                 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
 297                 break;
 298         case WPS_ENCR_AES:
 299                 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 300                 break;
 301         }
 302
 303         switch (cred->auth_type) {
 304         case WPS_AUTH_OPEN:
 305                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 306                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 307                 ssid->proto = 0;
 308                 break;
 309         case WPS_AUTH_SHARED:
 310                 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 311                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 312                 ssid->proto = 0;
 313                 break;
 314         case WPS_AUTH_WPAPSK:
 315                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 316                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 317                 ssid->proto = WPA_PROTO_WPA;
 318                 break;
 319         case WPS_AUTH_WPA:
 320                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 321                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 322                 ssid->proto = WPA_PROTO_WPA;
 323                 break;
 324         case WPS_AUTH_WPA2:
 325                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 326                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 327                 ssid->proto = WPA_PROTO_RSN;
 328                 break;
 329         case WPS_AUTH_WPA2PSK:
 330                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 331                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 332                 ssid->proto = WPA_PROTO_RSN;
 333                 break;
 334         }
 335
 336         if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
 337                 if (cred->key_len == 2 * PMK_LEN) {
 338                         if (hexstr2bin((const char *) cred->key, ssid->psk,
 339                                        PMK_LEN)) {
 340                                 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
 341                                            "Key");
 342                                 return -1;
 343                         }
 344                         ssid->psk_set = 1;
 345                 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
 346                         os_free(ssid->passphrase);
 347                         ssid->passphrase = os_malloc(cred->key_len + 1);
 348                         if (ssid->passphrase == NULL)
 349                                 return -1;
 350                         os_memcpy(ssid->passphrase, cred->key, cred->key_len);
 351                         ssid->passphrase[cred->key_len] = '\0';
 352                         wpa_config_update_psk(ssid);
 353                 } else {
 354                         wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
 355                                    "length %lu",
 356                                    (unsigned long) cred->key_len);
 357                         return -1;
 358                 }
 359         }
 360
 361         wpas_wps_security_workaround(wpa_s, ssid, cred);
 362
 363 #ifndef CONFIG_NO_CONFIG_WRITE
 364         if (wpa_s->conf->update_config &&
 365             wpa_config_write(wpa_s->confname, wpa_s->conf)) {
 366                 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
 367                 return -1;
 368         }
 369 #endif /* CONFIG_NO_CONFIG_WRITE */
 370
 371         return 0;
 372 }
 373
 374
 375 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
 376                                          struct wps_event_m2d *m2d)
 377 {
 378         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
 379                 "dev_password_id=%d config_error=%d",
 380                 m2d->dev_password_id, m2d->config_error);
 381 }
 382
 383
 384 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
 385                                           struct wps_event_fail *fail)
 386 {
 387         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
 388         wpas_clear_wps(wpa_s);
 389 }
 390
 391
 392 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
 393 {
 394         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
 395         wpa_s->wps_success = 1;
 396 }
 397
 398
 399 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 400                                      union wps_event_data *data)
 401 {
 402         struct wpa_supplicant *wpa_s = ctx;
 403         switch (event) {
 404         case WPS_EV_M2D:
 405                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 406                 break;
 407         case WPS_EV_FAIL:
 408                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 409                 break;
 410         case WPS_EV_SUCCESS:
 411                 wpa_supplicant_wps_event_success(wpa_s);
 412                 break;
 413         case WPS_EV_PWD_AUTH_FAIL:
 414                 break;
 415         }
 416 }
 417
 418
 419 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 420 {
 421         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 422             eap_is_wps_pin_enrollee(&ssid->eap))
 423                 return WPS_REQ_ENROLLEE;
 424         else
 425                 return WPS_REQ_REGISTRAR;
 426 }
 427
 428
 429 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 430 {
 431         int id;
 432         struct wpa_ssid *ssid;
 433
 434         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 435
 436         /* Remove any existing WPS network from configuration */
 437         ssid = wpa_s->conf->ssid;
 438         while (ssid) {
 439                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 440                         if (ssid == wpa_s->current_ssid)
 441                                 wpa_s->current_ssid = NULL;
 442                         id = ssid->id;
 443                 } else
 444                         id = -1;
 445                 ssid = ssid->next;
 446                 if (id >= 0)
 447                         wpa_config_remove_network(wpa_s->conf, id);
 448         }
 449 }
 450
 451
 452 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 453 {
 454         struct wpa_supplicant *wpa_s = eloop_ctx;
 455         wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 456                    "out");
 457         wpas_clear_wps(wpa_s);
 458 }
 459
 460
 461 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 462                                               int registrar, const u8 *bssid)
 463 {
 464         struct wpa_ssid *ssid;
 465
 466         ssid = wpa_config_add_network(wpa_s->conf);
 467         if (ssid == NULL)
 468                 return NULL;
 469         wpa_config_set_network_defaults(ssid);
 470         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 471             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 472             wpa_config_set(ssid, "identity", registrar ?
 473                            "\"" WSC_ID_REGISTRAR "\"" :
 474                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 475                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 476                 return NULL;
 477         }
 478
 479         if (bssid) {
 480                 size_t i;
 481                 struct wpa_scan_res *res;
 482
 483                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 484                 ssid->bssid_set = 1;
 485
 486                 /* Try to get SSID from scan results */
 487                 if (wpa_s->scan_res == NULL &&
 488                     wpa_supplicant_get_scan_results(wpa_s) < 0)
 489                         return ssid; /* Could not find any scan results */
 490
 491                 for (i = 0; i < wpa_s->scan_res->num; i++) {
 492                         const u8 *ie;
 493
 494                         res = wpa_s->scan_res->res[i];
 495                         if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
 496                                 continue;
 497
 498                         ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 499                         if (ie == NULL)
 500                                 break;
 501                         os_free(ssid->ssid);
 502                         ssid->ssid = os_malloc(ie[1]);
 503                         if (ssid->ssid == NULL)
 504                                 break;
 505                         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 506                         ssid->ssid_len = ie[1];
 507                         break;
 508                 }
 509         }
 510
 511         return ssid;
 512 }
 513
 514
 515 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 516                              struct wpa_ssid *selected)
 517 {
 518         struct wpa_ssid *ssid;
 519
 520         /* Mark all other networks disabled and trigger reassociation */
 521         ssid = wpa_s->conf->ssid;
 522         while (ssid) {
 523                 ssid->disabled = ssid != selected;
 524                 ssid = ssid->next;
 525         }
 526         wpa_s->disconnected = 0;
 527         wpa_s->reassociate = 1;
 528         wpa_s->scan_runs = 0;
 529         wpa_s->wps_success = 0;
 530         wpa_s->blacklist_cleared = 0;
 531         wpa_supplicant_req_scan(wpa_s, 0, 0);
 532 }
 533
 534
 535 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 536 {
 537         struct wpa_ssid *ssid;
 538         wpas_clear_wps(wpa_s);
 539         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 540         if (ssid == NULL)
 541                 return -1;
 542         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 543         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 544                                wpa_s, NULL);
 545         wpas_wps_reassoc(wpa_s, ssid);
 546         return 0;
 547 }
 548
 549
 550 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 551                        const char *pin)
 552 {
 553         struct wpa_ssid *ssid;
 554         char val[128];
 555         unsigned int rpin = 0;
 556
 557         wpas_clear_wps(wpa_s);
 558         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 559         if (ssid == NULL)
 560                 return -1;
 561         if (pin)
 562                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 563         else {
 564                 rpin = wps_generate_pin();
 565                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 566         }
 567         wpa_config_set(ssid, "phase1", val, 0);
 568         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 569                                wpa_s, NULL);
 570         wpas_wps_reassoc(wpa_s, ssid);
 571         return rpin;
 572 }
 573
 574
 575 #ifdef CONFIG_WPS_OOB
 576 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 577                        char *path, char *method, char *name)
 578 {
 579         struct wps_context *wps = wpa_s->wps;
 580         struct oob_device_data *oob_dev;
 581
 582         oob_dev = wps_get_oob_device(device_type);
 583         if (oob_dev == NULL)
 584                 return -1;
 585         oob_dev->device_path = path;
 586         oob_dev->device_name = name;
 587         wps->oob_conf.oob_method = wps_get_oob_method(method);
 588
 589         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 590                 /*
 591                  * Use pre-configured DH keys in order to be able to write the
 592                  * key hash into the OOB file.
 593                  */
 594                 wpabuf_free(wps->dh_pubkey);
 595                 wpabuf_free(wps->dh_privkey);
 596                 wps->dh_privkey = NULL;
 597                 wps->dh_pubkey = dh_init(dh_groups_get(WPS_DH_GROUP),
 598                                          &wps->dh_privkey);
 599                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 600                 if (wps->dh_pubkey == NULL) {
 601                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 602                                    "Diffie-Hellman handshake");
 603                         return -1;
 604                 }
 605         }
 606
 607         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 608                 wpas_clear_wps(wpa_s);
 609
 610         if (wps_process_oob(wps, oob_dev, 0) < 0)
 611                 return -1;
 612
 613         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 614              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 615             wpas_wps_start_pin(wpa_s, NULL,
 616                                wpabuf_head(wps->oob_conf.dev_password)) < 0)
 617                         return -1;
 618
 619         return 0;
 620 }
 621 #endif /* CONFIG_WPS_OOB */
 622
 623
 624 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 625                        const char *pin)
 626 {
 627         struct wpa_ssid *ssid;
 628         char val[30];
 629
 630         if (!pin)
 631                 return -1;
 632         wpas_clear_wps(wpa_s);
 633         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 634         if (ssid == NULL)
 635                 return -1;
 636         os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 637         wpa_config_set(ssid, "phase1", val, 0);
 638         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 639                                wpa_s, NULL);
 640         wpas_wps_reassoc(wpa_s, ssid);
 641         return 0;
 642 }
 643
 644
 645 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 646                                size_t psk_len)
 647 {
 648         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 649                    "STA " MACSTR, MAC2STR(mac_addr));
 650         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 651
 652         /* TODO */
 653
 654         return 0;
 655 }
 656
 657
 658 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 659                                    const struct wps_device_data *dev)
 660 {
 661         char uuid[40], txt[400];
 662         int len;
 663         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 664                 return;
 665         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 666         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 667                           " [%s|%s|%s|%s|%s|%d-%08X-%d]",
 668                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 669                           dev->manufacturer, dev->model_name,
 670                           dev->model_number, dev->serial_number,
 671                           dev->categ, dev->oui, dev->sub_categ);
 672         if (len > 0 && len < (int) sizeof(txt))
 673                 wpa_printf(MSG_INFO, "%s", txt);
 674 }
 675
 676
 677 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 678 {
 679         struct wps_context *wps;
 680         struct wps_registrar_config rcfg;
 681
 682         wps = os_zalloc(sizeof(*wps));
 683         if (wps == NULL)
 684                 return -1;
 685
 686         wps->cred_cb = wpa_supplicant_wps_cred;
 687         wps->event_cb = wpa_supplicant_wps_event;
 688         wps->cb_ctx = wpa_s;
 689
 690         wps->dev.device_name = wpa_s->conf->device_name;
 691         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 692         wps->dev.model_name = wpa_s->conf->model_name;
 693         wps->dev.model_number = wpa_s->conf->model_number;
 694         wps->dev.serial_number = wpa_s->conf->serial_number;
 695         if (wpa_s->conf->device_type) {
 696                 char *pos;
 697                 u8 oui[4];
 698                 /* <categ>-<OUI>-<subcateg> */
 699                 wps->dev.categ = atoi(wpa_s->conf->device_type);
 700                 pos = os_strchr(wpa_s->conf->device_type, '-');
 701                 if (pos == NULL) {
 702                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 703                         os_free(wps);
 704                         return -1;
 705                 }
 706                 pos++;
 707                 if (hexstr2bin(pos, oui, 4)) {
 708                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
 709                         os_free(wps);
 710                         return -1;
 711                 }
 712                 wps->dev.oui = WPA_GET_BE32(oui);
 713                 pos = os_strchr(pos, '-');
 714                 if (pos == NULL) {
 715                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 716                         os_free(wps);
 717                         return -1;
 718                 }
 719                 pos++;
 720                 wps->dev.sub_categ = atoi(pos);
 721         }
 722         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 723         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 724         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 725         if (is_nil_uuid(wpa_s->conf->uuid)) {
 726                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 727                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 728                             wps->uuid, WPS_UUID_LEN);
 729         } else
 730                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 731
 732         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 733         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 734
 735         os_memset(&rcfg, 0, sizeof(rcfg));
 736         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 737         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 738         rcfg.cb_ctx = wpa_s;
 739
 740         wps->registrar = wps_registrar_init(wps, &rcfg);
 741         if (wps->registrar == NULL) {
 742                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 743                 os_free(wps);
 744                 return -1;
 745         }
 746
 747         wpa_s->wps = wps;
 748
 749         return 0;
 750 }
 751
 752
 753 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 754 {
 755         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 756
 757         if (wpa_s->wps == NULL)
 758                 return;
 759
 760         wps_registrar_deinit(wpa_s->wps->registrar);
 761         wpabuf_free(wpa_s->wps->dh_pubkey);
 762         wpabuf_free(wpa_s->wps->dh_privkey);
 763         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
 764         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
 765         os_free(wpa_s->wps->network_key);
 766         os_free(wpa_s->wps);
 767         wpa_s->wps = NULL;
 768 }
 769
 770
 771 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
 772                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 773 {
 774         struct wpabuf *wps_ie;
 775
 776         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 777                 return -1;
 778
 779         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 780         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 781                 if (!wps_ie) {
 782                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 783                         return 0;
 784                 }
 785
 786                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 787                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 788                                    "without active PBC Registrar");
 789                         wpabuf_free(wps_ie);
 790                         return 0;
 791                 }
 792
 793                 /* TODO: overlap detection */
 794                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 795                            "(Active PBC)");
 796                 wpabuf_free(wps_ie);
 797                 return 1;
 798         }
 799
 800         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 801                 if (!wps_ie) {
 802                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 803                         return 0;
 804                 }
 805
 806                 /*
 807                  * Start with WPS APs that advertise active PIN Registrar and
 808                  * allow any WPS AP after third scan since some APs do not set
 809                  * Selected Registrar attribute properly when using external
 810                  * Registrar.
 811                  */
 812                 if (!wps_is_selected_pin_registrar(wps_ie)) {
 813                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
 814                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 815                                            "without active PIN Registrar");
 816                                 wpabuf_free(wps_ie);
 817                                 return 0;
 818                         }
 819                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 820                 } else {
 821                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 822                                    "(Active PIN)");
 823                 }
 824                 wpabuf_free(wps_ie);
 825                 return 1;
 826         }
 827
 828         if (wps_ie) {
 829                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 830                 wpabuf_free(wps_ie);
 831                 return 1;
 832         }
 833
 834         return -1;
 835 }
 836
 837
 838 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
 839                               struct wpa_ssid *ssid,
 840                               struct wpa_scan_res *bss)
 841 {
 842         struct wpabuf *wps_ie = NULL;
 843         int ret = 0;
 844
 845         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 846                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 847                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
 848                         /* allow wildcard SSID for WPS PBC */
 849                         ret = 1;
 850                 }
 851         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 852                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 853                 if (wps_ie &&
 854                     (wps_is_selected_pin_registrar(wps_ie) ||
 855                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
 856                         /* allow wildcard SSID for WPS PIN */
 857                         ret = 1;
 858                 }
 859         }
 860
 861         if (!ret && ssid->bssid_set &&
 862             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
 863                 /* allow wildcard SSID due to hardcoded BSSID match */
 864                 ret = 1;
 865         }
 866
 867         wpabuf_free(wps_ie);
 868
 869         return ret;
 870 }
 871
 872
 873 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
 874                               struct wpa_scan_res *selected,
 875                               struct wpa_ssid *ssid)
 876 {
 877         const u8 *sel_uuid, *uuid;
 878         size_t i;
 879         struct wpabuf *wps_ie;
 880         int ret = 0;
 881
 882         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
 883                 return 0;
 884
 885         /* Make sure that only one AP is in active PBC mode */
 886         wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
 887         if (wps_ie)
 888                 sel_uuid = wps_get_uuid_e(wps_ie);
 889         else
 890                 sel_uuid = NULL;
 891
 892         for (i = 0; i < wpa_s->scan_res->num; i++) {
 893                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 894                 struct wpabuf *ie;
 895                 if (bss == selected)
 896                         continue;
 897                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 898                 if (!ie)
 899                         continue;
 900                 if (!wps_is_selected_pbc_registrar(ie)) {
 901                         wpabuf_free(ie);
 902                         continue;
 903                 }
 904                 uuid = wps_get_uuid_e(ie);
 905                 if (sel_uuid == NULL || uuid == NULL ||
 906                     os_memcmp(sel_uuid, uuid, 16) != 0) {
 907                         ret = 1; /* PBC overlap */
 908                         wpabuf_free(ie);
 909                         break;
 910                 }
 911
 912                 /* TODO: verify that this is reasonable dual-band situation */
 913
 914                 wpabuf_free(ie);
 915         }
 916
 917         wpabuf_free(wps_ie);
 918
 919         return ret;
 920 }
 921
 922
 923 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
 924 {
 925         size_t i;
 926
 927         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
 928                 return;
 929
 930         for (i = 0; i < wpa_s->scan_res->num; i++) {
 931                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 932                 struct wpabuf *ie;
 933                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 934                 if (!ie)
 935                         continue;
 936                 if (wps_is_selected_pbc_registrar(ie))
 937                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
 938                 else if (wps_is_selected_pin_registrar(ie))
 939                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
 940                 else
 941                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
 942                 wpabuf_free(ie);
 943                 break;
 944         }
 945 }
 946
 947
 948 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
 949 {
 950         struct wpa_ssid *ssid;
 951
 952         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 953                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
 954                         return 1;
 955         }
 956
 957         return 0;
 958 }