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         if (cred->auth_type != WPS_AUTH_OPEN &&
 214             cred->auth_type != WPS_AUTH_SHARED &&
 215             cred->auth_type != WPS_AUTH_WPAPSK &&
 216             cred->auth_type != WPS_AUTH_WPA2PSK) {
 217                 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
 218                            "unsupported authentication type %d",
 219                            cred->auth_type);
 220                 return 0;
 221         }
 222
 223         if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 224                 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
 225                            "on the received credential");
 226                 os_free(ssid->eap.identity);
 227                 ssid->eap.identity = NULL;
 228                 ssid->eap.identity_len = 0;
 229                 os_free(ssid->eap.phase1);
 230                 ssid->eap.phase1 = NULL;
 231                 os_free(ssid->eap.eap_methods);
 232                 ssid->eap.eap_methods = NULL;
 233         } else {
 234                 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
 235                            "received credential");
 236                 ssid = wpa_config_add_network(wpa_s->conf);
 237                 if (ssid == NULL)
 238                         return -1;
 239         }
 240
 241         wpa_config_set_network_defaults(ssid);
 242
 243         os_free(ssid->ssid);
 244         ssid->ssid = os_malloc(cred->ssid_len);
 245         if (ssid->ssid) {
 246                 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
 247                 ssid->ssid_len = cred->ssid_len;
 248         }
 249
 250         switch (cred->encr_type) {
 251         case WPS_ENCR_NONE:
 252                 break;
 253         case WPS_ENCR_WEP:
 254                 if (cred->key_len <= 0)
 255                         break;
 256                 if (cred->key_len != 5 && cred->key_len != 13 &&
 257                     cred->key_len != 10 && cred->key_len != 26) {
 258                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
 259                                    "%lu", (unsigned long) cred->key_len);
 260                         return -1;
 261                 }
 262                 if (cred->key_idx > NUM_WEP_KEYS) {
 263                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
 264                                    cred->key_idx);
 265                         return -1;
 266                 }
 267                 if (cred->key_idx)
 268                         key_idx = cred->key_idx - 1;
 269                 if (cred->key_len == 10 || cred->key_len == 26) {
 270                         if (hexstr2bin((char *) cred->key,
 271                                        ssid->wep_key[key_idx],
 272                                        cred->key_len / 2) < 0) {
 273                                 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
 274                                            "%d", key_idx);
 275                                 return -1;
 276                         }
 277                         ssid->wep_key_len[key_idx] = cred->key_len / 2;
 278                 } else {
 279                         os_memcpy(ssid->wep_key[key_idx], cred->key,
 280                                   cred->key_len);
 281                         ssid->wep_key_len[key_idx] = cred->key_len;
 282                 }
 283                 ssid->wep_tx_keyidx = key_idx;
 284                 break;
 285         case WPS_ENCR_TKIP:
 286                 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
 287                 break;
 288         case WPS_ENCR_AES:
 289                 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 290                 break;
 291         }
 292
 293         switch (cred->auth_type) {
 294         case WPS_AUTH_OPEN:
 295                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 296                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 297                 ssid->proto = 0;
 298                 break;
 299         case WPS_AUTH_SHARED:
 300                 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 301                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 302                 ssid->proto = 0;
 303                 break;
 304         case WPS_AUTH_WPAPSK:
 305                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 306                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 307                 ssid->proto = WPA_PROTO_WPA;
 308                 break;
 309         case WPS_AUTH_WPA:
 310                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 311                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 312                 ssid->proto = WPA_PROTO_WPA;
 313                 break;
 314         case WPS_AUTH_WPA2:
 315                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 316                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 317                 ssid->proto = WPA_PROTO_RSN;
 318                 break;
 319         case WPS_AUTH_WPA2PSK:
 320                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 321                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 322                 ssid->proto = WPA_PROTO_RSN;
 323                 break;
 324         }
 325
 326         if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
 327                 if (cred->key_len == 2 * PMK_LEN) {
 328                         if (hexstr2bin((const char *) cred->key, ssid->psk,
 329                                        PMK_LEN)) {
 330                                 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
 331                                            "Key");
 332                                 return -1;
 333                         }
 334                         ssid->psk_set = 1;
 335                 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
 336                         os_free(ssid->passphrase);
 337                         ssid->passphrase = os_malloc(cred->key_len + 1);
 338                         if (ssid->passphrase == NULL)
 339                                 return -1;
 340                         os_memcpy(ssid->passphrase, cred->key, cred->key_len);
 341                         ssid->passphrase[cred->key_len] = '\0';
 342                         wpa_config_update_psk(ssid);
 343                 } else {
 344                         wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
 345                                    "length %lu",
 346                                    (unsigned long) cred->key_len);
 347                         return -1;
 348                 }
 349         }
 350
 351         wpas_wps_security_workaround(wpa_s, ssid, cred);
 352
 353 #ifndef CONFIG_NO_CONFIG_WRITE
 354         if (wpa_s->conf->update_config &&
 355             wpa_config_write(wpa_s->confname, wpa_s->conf)) {
 356                 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
 357                 return -1;
 358         }
 359 #endif /* CONFIG_NO_CONFIG_WRITE */
 360
 361         return 0;
 362 }
 363
 364
 365 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
 366                                          struct wps_event_m2d *m2d)
 367 {
 368         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
 369                 "dev_password_id=%d config_error=%d",
 370                 m2d->dev_password_id, m2d->config_error);
 371 }
 372
 373
 374 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
 375                                           struct wps_event_fail *fail)
 376 {
 377         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
 378         wpas_clear_wps(wpa_s);
 379 }
 380
 381
 382 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
 383 {
 384         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
 385         wpa_s->wps_success = 1;
 386 }
 387
 388
 389 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 390                                      union wps_event_data *data)
 391 {
 392         struct wpa_supplicant *wpa_s = ctx;
 393         switch (event) {
 394         case WPS_EV_M2D:
 395                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 396                 break;
 397         case WPS_EV_FAIL:
 398                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 399                 break;
 400         case WPS_EV_SUCCESS:
 401                 wpa_supplicant_wps_event_success(wpa_s);
 402                 break;
 403         case WPS_EV_PWD_AUTH_FAIL:
 404                 break;
 405         }
 406 }
 407
 408
 409 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 410 {
 411         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 412             eap_is_wps_pin_enrollee(&ssid->eap))
 413                 return WPS_REQ_ENROLLEE;
 414         else
 415                 return WPS_REQ_REGISTRAR;
 416 }
 417
 418
 419 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 420 {
 421         int id;
 422         struct wpa_ssid *ssid;
 423
 424         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 425
 426         /* Remove any existing WPS network from configuration */
 427         ssid = wpa_s->conf->ssid;
 428         while (ssid) {
 429                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 430                         if (ssid == wpa_s->current_ssid)
 431                                 wpa_s->current_ssid = NULL;
 432                         id = ssid->id;
 433                 } else
 434                         id = -1;
 435                 ssid = ssid->next;
 436                 if (id >= 0)
 437                         wpa_config_remove_network(wpa_s->conf, id);
 438         }
 439 }
 440
 441
 442 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 443 {
 444         struct wpa_supplicant *wpa_s = eloop_ctx;
 445         wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 446                    "out");
 447         wpas_clear_wps(wpa_s);
 448 }
 449
 450
 451 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 452                                               int registrar, const u8 *bssid)
 453 {
 454         struct wpa_ssid *ssid;
 455
 456         ssid = wpa_config_add_network(wpa_s->conf);
 457         if (ssid == NULL)
 458                 return NULL;
 459         wpa_config_set_network_defaults(ssid);
 460         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 461             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 462             wpa_config_set(ssid, "identity", registrar ?
 463                            "\"" WSC_ID_REGISTRAR "\"" :
 464                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 465                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 466                 return NULL;
 467         }
 468
 469         if (bssid) {
 470                 size_t i;
 471                 struct wpa_scan_res *res;
 472
 473                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 474                 ssid->bssid_set = 1;
 475
 476                 /* Try to get SSID from scan results */
 477                 if (wpa_s->scan_res == NULL &&
 478                     wpa_supplicant_get_scan_results(wpa_s) < 0)
 479                         return ssid; /* Could not find any scan results */
 480
 481                 for (i = 0; i < wpa_s->scan_res->num; i++) {
 482                         const u8 *ie;
 483
 484                         res = wpa_s->scan_res->res[i];
 485                         if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
 486                                 continue;
 487
 488                         ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 489                         if (ie == NULL)
 490                                 break;
 491                         os_free(ssid->ssid);
 492                         ssid->ssid = os_malloc(ie[1]);
 493                         if (ssid->ssid == NULL)
 494                                 break;
 495                         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 496                         ssid->ssid_len = ie[1];
 497                         break;
 498                 }
 499         }
 500
 501         return ssid;
 502 }
 503
 504
 505 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 506                              struct wpa_ssid *selected)
 507 {
 508         struct wpa_ssid *ssid;
 509
 510         /* Mark all other networks disabled and trigger reassociation */
 511         ssid = wpa_s->conf->ssid;
 512         while (ssid) {
 513                 ssid->disabled = ssid != selected;
 514                 ssid = ssid->next;
 515         }
 516         wpa_s->disconnected = 0;
 517         wpa_s->reassociate = 1;
 518         wpa_s->scan_runs = 0;
 519         wpa_s->wps_success = 0;
 520         wpa_s->blacklist_cleared = 0;
 521         wpa_supplicant_req_scan(wpa_s, 0, 0);
 522 }
 523
 524
 525 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 526 {
 527         struct wpa_ssid *ssid;
 528         wpas_clear_wps(wpa_s);
 529         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 530         if (ssid == NULL)
 531                 return -1;
 532         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 533         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 534                                wpa_s, NULL);
 535         wpas_wps_reassoc(wpa_s, ssid);
 536         return 0;
 537 }
 538
 539
 540 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 541                        const char *pin)
 542 {
 543         struct wpa_ssid *ssid;
 544         char val[128];
 545         unsigned int rpin = 0;
 546
 547         wpas_clear_wps(wpa_s);
 548         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 549         if (ssid == NULL)
 550                 return -1;
 551         if (pin)
 552                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 553         else {
 554                 rpin = wps_generate_pin();
 555                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 556         }
 557         wpa_config_set(ssid, "phase1", val, 0);
 558         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 559                                wpa_s, NULL);
 560         wpas_wps_reassoc(wpa_s, ssid);
 561         return rpin;
 562 }
 563
 564
 565 #ifdef CONFIG_WPS_OOB
 566 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 567                        char *path, char *method, char *name)
 568 {
 569         struct wps_context *wps = wpa_s->wps;
 570         struct oob_device_data *oob_dev;
 571
 572         oob_dev = wps_get_oob_device(device_type);
 573         if (oob_dev == NULL)
 574                 return -1;
 575         oob_dev->device_path = path;
 576         oob_dev->device_name = name;
 577         wps->oob_conf.oob_method = wps_get_oob_method(method);
 578
 579         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 580                 /*
 581                  * Use pre-configured DH keys in order to be able to write the
 582                  * key hash into the OOB file.
 583                  */
 584                 wpabuf_free(wps->dh_pubkey);
 585                 wpabuf_free(wps->dh_privkey);
 586                 wps->dh_privkey = NULL;
 587                 wps->dh_pubkey = dh_init(dh_groups_get(WPS_DH_GROUP),
 588                                          &wps->dh_privkey);
 589                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 590                 if (wps->dh_pubkey == NULL) {
 591                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 592                                    "Diffie-Hellman handshake");
 593                         return -1;
 594                 }
 595         }
 596
 597         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 598                 wpas_clear_wps(wpa_s);
 599
 600         if (wps_process_oob(wps, oob_dev, 0) < 0)
 601                 return -1;
 602
 603         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 604              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 605             wpas_wps_start_pin(wpa_s, NULL,
 606                                wpabuf_head(wps->oob_conf.dev_password)) < 0)
 607                         return -1;
 608
 609         return 0;
 610 }
 611 #endif /* CONFIG_WPS_OOB */
 612
 613
 614 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 615                        const char *pin)
 616 {
 617         struct wpa_ssid *ssid;
 618         char val[30];
 619
 620         if (!pin)
 621                 return -1;
 622         wpas_clear_wps(wpa_s);
 623         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 624         if (ssid == NULL)
 625                 return -1;
 626         os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 627         wpa_config_set(ssid, "phase1", val, 0);
 628         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 629                                wpa_s, NULL);
 630         wpas_wps_reassoc(wpa_s, ssid);
 631         return 0;
 632 }
 633
 634
 635 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 636                                size_t psk_len)
 637 {
 638         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 639                    "STA " MACSTR, MAC2STR(mac_addr));
 640         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 641
 642         /* TODO */
 643
 644         return 0;
 645 }
 646
 647
 648 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 649                                    const struct wps_device_data *dev)
 650 {
 651         char uuid[40], txt[400];
 652         int len;
 653         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 654                 return;
 655         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 656         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 657                           " [%s|%s|%s|%s|%s|%d-%08X-%d]",
 658                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 659                           dev->manufacturer, dev->model_name,
 660                           dev->model_number, dev->serial_number,
 661                           dev->categ, dev->oui, dev->sub_categ);
 662         if (len > 0 && len < (int) sizeof(txt))
 663                 wpa_printf(MSG_INFO, "%s", txt);
 664 }
 665
 666
 667 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 668 {
 669         struct wps_context *wps;
 670         struct wps_registrar_config rcfg;
 671
 672         wps = os_zalloc(sizeof(*wps));
 673         if (wps == NULL)
 674                 return -1;
 675
 676         wps->cred_cb = wpa_supplicant_wps_cred;
 677         wps->event_cb = wpa_supplicant_wps_event;
 678         wps->cb_ctx = wpa_s;
 679
 680         wps->dev.device_name = wpa_s->conf->device_name;
 681         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 682         wps->dev.model_name = wpa_s->conf->model_name;
 683         wps->dev.model_number = wpa_s->conf->model_number;
 684         wps->dev.serial_number = wpa_s->conf->serial_number;
 685         if (wpa_s->conf->device_type) {
 686                 char *pos;
 687                 u8 oui[4];
 688                 /* <categ>-<OUI>-<subcateg> */
 689                 wps->dev.categ = atoi(wpa_s->conf->device_type);
 690                 pos = os_strchr(wpa_s->conf->device_type, '-');
 691                 if (pos == NULL) {
 692                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 693                         os_free(wps);
 694                         return -1;
 695                 }
 696                 pos++;
 697                 if (hexstr2bin(pos, oui, 4)) {
 698                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
 699                         os_free(wps);
 700                         return -1;
 701                 }
 702                 wps->dev.oui = WPA_GET_BE32(oui);
 703                 pos = os_strchr(pos, '-');
 704                 if (pos == NULL) {
 705                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 706                         os_free(wps);
 707                         return -1;
 708                 }
 709                 pos++;
 710                 wps->dev.sub_categ = atoi(pos);
 711         }
 712         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 713         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 714         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 715         if (is_nil_uuid(wpa_s->conf->uuid)) {
 716                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 717                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 718                             wps->uuid, WPS_UUID_LEN);
 719         } else
 720                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 721
 722         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 723         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 724
 725         os_memset(&rcfg, 0, sizeof(rcfg));
 726         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 727         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 728         rcfg.cb_ctx = wpa_s;
 729
 730         wps->registrar = wps_registrar_init(wps, &rcfg);
 731         if (wps->registrar == NULL) {
 732                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 733                 os_free(wps);
 734                 return -1;
 735         }
 736
 737         wpa_s->wps = wps;
 738
 739         return 0;
 740 }
 741
 742
 743 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 744 {
 745         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 746
 747         if (wpa_s->wps == NULL)
 748                 return;
 749
 750         wps_registrar_deinit(wpa_s->wps->registrar);
 751         wpabuf_free(wpa_s->wps->dh_pubkey);
 752         wpabuf_free(wpa_s->wps->dh_privkey);
 753         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
 754         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
 755         os_free(wpa_s->wps->network_key);
 756         os_free(wpa_s->wps);
 757         wpa_s->wps = NULL;
 758 }
 759
 760
 761 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
 762                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 763 {
 764         struct wpabuf *wps_ie;
 765
 766         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 767                 return -1;
 768
 769         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 770         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 771                 if (!wps_ie) {
 772                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 773                         return 0;
 774                 }
 775
 776                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 777                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 778                                    "without active PBC Registrar");
 779                         wpabuf_free(wps_ie);
 780                         return 0;
 781                 }
 782
 783                 /* TODO: overlap detection */
 784                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 785                            "(Active PBC)");
 786                 wpabuf_free(wps_ie);
 787                 return 1;
 788         }
 789
 790         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 791                 if (!wps_ie) {
 792                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 793                         return 0;
 794                 }
 795
 796                 /*
 797                  * Start with WPS APs that advertise active PIN Registrar and
 798                  * allow any WPS AP after third scan since some APs do not set
 799                  * Selected Registrar attribute properly when using external
 800                  * Registrar.
 801                  */
 802                 if (!wps_is_selected_pin_registrar(wps_ie)) {
 803                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
 804                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 805                                            "without active PIN Registrar");
 806                                 wpabuf_free(wps_ie);
 807                                 return 0;
 808                         }
 809                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 810                 } else {
 811                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 812                                    "(Active PIN)");
 813                 }
 814                 wpabuf_free(wps_ie);
 815                 return 1;
 816         }
 817
 818         if (wps_ie) {
 819                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 820                 wpabuf_free(wps_ie);
 821                 return 1;
 822         }
 823
 824         return -1;
 825 }
 826
 827
 828 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
 829                               struct wpa_ssid *ssid,
 830                               struct wpa_scan_res *bss)
 831 {
 832         struct wpabuf *wps_ie = NULL;
 833         int ret = 0;
 834
 835         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 836                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 837                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
 838                         /* allow wildcard SSID for WPS PBC */
 839                         ret = 1;
 840                 }
 841         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 842                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 843                 if (wps_ie &&
 844                     (wps_is_selected_pin_registrar(wps_ie) ||
 845                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
 846                         /* allow wildcard SSID for WPS PIN */
 847                         ret = 1;
 848                 }
 849         }
 850
 851         if (!ret && ssid->bssid_set &&
 852             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
 853                 /* allow wildcard SSID due to hardcoded BSSID match */
 854                 ret = 1;
 855         }
 856
 857         wpabuf_free(wps_ie);
 858
 859         return ret;
 860 }
 861
 862
 863 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
 864                               struct wpa_scan_res *selected,
 865                               struct wpa_ssid *ssid)
 866 {
 867         const u8 *sel_uuid, *uuid;
 868         size_t i;
 869         struct wpabuf *wps_ie;
 870         int ret = 0;
 871
 872         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
 873                 return 0;
 874
 875         /* Make sure that only one AP is in active PBC mode */
 876         wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
 877         if (wps_ie)
 878                 sel_uuid = wps_get_uuid_e(wps_ie);
 879         else
 880                 sel_uuid = NULL;
 881
 882         for (i = 0; i < wpa_s->scan_res->num; i++) {
 883                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 884                 struct wpabuf *ie;
 885                 if (bss == selected)
 886                         continue;
 887                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 888                 if (!ie)
 889                         continue;
 890                 if (!wps_is_selected_pbc_registrar(ie)) {
 891                         wpabuf_free(ie);
 892                         continue;
 893                 }
 894                 uuid = wps_get_uuid_e(ie);
 895                 if (sel_uuid == NULL || uuid == NULL ||
 896                     os_memcmp(sel_uuid, uuid, 16) != 0) {
 897                         ret = 1; /* PBC overlap */
 898                         wpabuf_free(ie);
 899                         break;
 900                 }
 901
 902                 /* TODO: verify that this is reasonable dual-band situation */
 903
 904                 wpabuf_free(ie);
 905         }
 906
 907         wpabuf_free(wps_ie);
 908
 909         return ret;
 910 }
 911
 912
 913 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
 914 {
 915         size_t i;
 916
 917         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
 918                 return;
 919
 920         for (i = 0; i < wpa_s->scan_res->num; i++) {
 921                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 922                 struct wpabuf *ie;
 923                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 924                 if (!ie)
 925                         continue;
 926                 if (wps_is_selected_pbc_registrar(ie))
 927                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
 928                 else if (wps_is_selected_pin_registrar(ie))
 929                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
 930                 else
 931                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
 932                 wpabuf_free(ie);
 933                 break;
 934         }
 935 }
 936
 937
 938 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
 939 {
 940         struct wpa_ssid *ssid;
 941
 942         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 943                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
 944                         return 1;
 945         }
 946
 947         return 0;
 948 }