wpa_supplicant/wps_supplicant.c

   1 /*
   2  * wpa_supplicant / WPS integration
   3  * Copyright (c) 2008-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eloop.h"
  19 #include "uuid.h"
  20 #include "crypto/dh_group5.h"
  21 #include "common/ieee802_11_defs.h"
  22 #include "common/ieee802_11_common.h"
  23 #include "common/wpa_common.h"
  24 #include "common/wpa_ctrl.h"
  25 #include "eap_common/eap_wsc_common.h"
  26 #include "eap_peer/eap.h"
  27 #include "rsn_supp/wpa.h"
  28 #include "config.h"
  29 #include "wpa_supplicant_i.h"
  30 #include "driver_i.h"
  31 #include "notify.h"
  32 #include "blacklist.h"
  33 #include "bss.h"
  34 #include "scan.h"
  35 #include "wps_supplicant.h"
  36
  37
  38 #ifndef WPS_PIN_SCAN_IGNORE_SEL_REG
  39 #define WPS_PIN_SCAN_IGNORE_SEL_REG 3
  40 #endif /* WPS_PIN_SCAN_IGNORE_SEL_REG */
  41
  42 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
  43 static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
  44
  45
  46 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
  47 {
  48         if (!wpa_s->wps_success &&
  49             wpa_s->current_ssid &&
  50             eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
  51                 const u8 *bssid = wpa_s->bssid;
  52                 if (is_zero_ether_addr(bssid))
  53                         bssid = wpa_s->pending_bssid;
  54
  55                 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
  56                            " did not succeed - continue trying to find "
  57                            "suitable AP", MAC2STR(bssid));
  58                 wpa_blacklist_add(wpa_s, bssid);
  59
  60                 wpa_supplicant_deauthenticate(wpa_s,
  61                                               WLAN_REASON_DEAUTH_LEAVING);
  62                 wpa_s->reassociate = 1;
  63                 wpa_supplicant_req_scan(wpa_s,
  64                                         wpa_s->blacklist_cleared ? 5 : 0, 0);
  65                 wpa_s->blacklist_cleared = 0;
  66                 return 1;
  67         }
  68
  69         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
  70
  71         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
  72             !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
  73                 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
  74                            "try to associate with the received credential");
  75                 wpa_supplicant_deauthenticate(wpa_s,
  76                                               WLAN_REASON_DEAUTH_LEAVING);
  77                 wpa_s->after_wps = 5;
  78                 wpa_s->wps_freq = wpa_s->assoc_freq;
  79                 wpa_s->reassociate = 1;
  80                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  81                 return 1;
  82         }
  83
  84         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
  85                 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
  86                            "for external credential processing");
  87                 wpas_clear_wps(wpa_s);
  88                 wpa_supplicant_deauthenticate(wpa_s,
  89                                               WLAN_REASON_DEAUTH_LEAVING);
  90                 return 1;
  91         }
  92
  93         return 0;
  94 }
  95
  96
  97 static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
  98                                          struct wpa_ssid *ssid,
  99                                          const struct wps_credential *cred)
 100 {
 101         struct wpa_driver_capa capa;
 102         struct wpa_bss *bss;
 103         const u8 *ie;
 104         struct wpa_ie_data adv;
 105         int wpa2 = 0, ccmp = 0;
 106
 107         /*
 108          * Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
 109          * case they are configured for mixed mode operation (WPA+WPA2 and
 110          * TKIP+CCMP). Try to use scan results to figure out whether the AP
 111          * actually supports stronger security and select that if the client
 112          * has support for it, too.
 113          */
 114
 115         if (wpa_drv_get_capa(wpa_s, &capa))
 116                 return; /* Unknown what driver supports */
 117
 118         bss = wpa_bss_get(wpa_s, cred->mac_addr, ssid->ssid, ssid->ssid_len);
 119         if (bss == NULL) {
 120                 wpa_printf(MSG_DEBUG, "WPS: The AP was not found from BSS "
 121                            "table - use credential as-is");
 122                 return;
 123         }
 124
 125         wpa_printf(MSG_DEBUG, "WPS: AP found from BSS table");
 126
 127         ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 128         if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
 129                 wpa2 = 1;
 130                 if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
 131                         ccmp = 1;
 132         } else {
 133                 ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 134                 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
 135                     adv.pairwise_cipher & WPA_CIPHER_CCMP)
 136                         ccmp = 1;
 137         }
 138
 139         if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
 140             (ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
 141                 /*
 142                  * TODO: This could be the initial AP configuration and the
 143                  * Beacon contents could change shortly. Should request a new
 144                  * scan and delay addition of the network until the updated
 145                  * scan results are available.
 146                  */
 147                 wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
 148                            "support - use credential as-is");
 149                 return;
 150         }
 151
 152         if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
 153             (ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
 154             (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
 155                 wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
 156                            "based on scan results");
 157                 if (wpa_s->conf->ap_scan == 1)
 158                         ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
 159                 else
 160                         ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 161         }
 162
 163         if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
 164             (ssid->proto & WPA_PROTO_WPA) &&
 165             (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
 166                 wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
 167                            "based on scan results");
 168                 if (wpa_s->conf->ap_scan == 1)
 169                         ssid->proto |= WPA_PROTO_RSN;
 170                 else
 171                         ssid->proto = WPA_PROTO_RSN;
 172         }
 173 }
 174
 175
 176 static int wpa_supplicant_wps_cred(void *ctx,
 177                                    const struct wps_credential *cred)
 178 {
 179         struct wpa_supplicant *wpa_s = ctx;
 180         struct wpa_ssid *ssid = wpa_s->current_ssid;
 181         u8 key_idx = 0;
 182         u16 auth_type;
 183
 184         if ((wpa_s->conf->wps_cred_processing == 1 ||
 185              wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) {
 186                 size_t blen = cred->cred_attr_len * 2 + 1;
 187                 char *buf = os_malloc(blen);
 188                 if (buf) {
 189                         wpa_snprintf_hex(buf, blen,
 190                                          cred->cred_attr, cred->cred_attr_len);
 191                         wpa_msg(wpa_s, MSG_INFO, "%s%s",
 192                                 WPS_EVENT_CRED_RECEIVED, buf);
 193                         os_free(buf);
 194                 }
 195
 196                 wpas_notify_wps_credential(wpa_s, cred);
 197         } else
 198                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
 199
 200         wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
 201                         cred->cred_attr, cred->cred_attr_len);
 202
 203         if (wpa_s->conf->wps_cred_processing == 1)
 204                 return 0;
 205
 206         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
 207         wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
 208                    cred->auth_type);
 209         wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
 210         wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
 211         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
 212                         cred->key, cred->key_len);
 213         wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
 214                    MAC2STR(cred->mac_addr));
 215
 216         auth_type = cred->auth_type;
 217         if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 218                 wpa_printf(MSG_DEBUG, "WPS: Workaround - convert mixed-mode "
 219                            "auth_type into WPA2PSK");
 220                 auth_type = WPS_AUTH_WPA2PSK;
 221         }
 222
 223         if (auth_type != WPS_AUTH_OPEN &&
 224             auth_type != WPS_AUTH_SHARED &&
 225             auth_type != WPS_AUTH_WPAPSK &&
 226             auth_type != WPS_AUTH_WPA2PSK) {
 227                 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
 228                            "unsupported authentication type 0x%x",
 229                            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                 wpas_notify_network_added(wpa_s, ssid);
 250         }
 251
 252         wpa_config_set_network_defaults(ssid);
 253
 254         os_free(ssid->ssid);
 255         ssid->ssid = os_malloc(cred->ssid_len);
 256         if (ssid->ssid) {
 257                 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
 258                 ssid->ssid_len = cred->ssid_len;
 259         }
 260
 261         switch (cred->encr_type) {
 262         case WPS_ENCR_NONE:
 263                 break;
 264         case WPS_ENCR_WEP:
 265                 if (cred->key_len <= 0)
 266                         break;
 267                 if (cred->key_len != 5 && cred->key_len != 13 &&
 268                     cred->key_len != 10 && cred->key_len != 26) {
 269                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
 270                                    "%lu", (unsigned long) cred->key_len);
 271                         return -1;
 272                 }
 273                 if (cred->key_idx > NUM_WEP_KEYS) {
 274                         wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
 275                                    cred->key_idx);
 276                         return -1;
 277                 }
 278                 if (cred->key_idx)
 279                         key_idx = cred->key_idx - 1;
 280                 if (cred->key_len == 10 || cred->key_len == 26) {
 281                         if (hexstr2bin((char *) cred->key,
 282                                        ssid->wep_key[key_idx],
 283                                        cred->key_len / 2) < 0) {
 284                                 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
 285                                            "%d", key_idx);
 286                                 return -1;
 287                         }
 288                         ssid->wep_key_len[key_idx] = cred->key_len / 2;
 289                 } else {
 290                         os_memcpy(ssid->wep_key[key_idx], cred->key,
 291                                   cred->key_len);
 292                         ssid->wep_key_len[key_idx] = cred->key_len;
 293                 }
 294                 ssid->wep_tx_keyidx = key_idx;
 295                 break;
 296         case WPS_ENCR_TKIP:
 297                 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
 298                 break;
 299         case WPS_ENCR_AES:
 300                 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 301                 break;
 302         }
 303
 304         switch (auth_type) {
 305         case WPS_AUTH_OPEN:
 306                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 307                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 308                 ssid->proto = 0;
 309                 break;
 310         case WPS_AUTH_SHARED:
 311                 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 312                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 313                 ssid->proto = 0;
 314                 break;
 315         case WPS_AUTH_WPAPSK:
 316                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 317                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 318                 ssid->proto = WPA_PROTO_WPA;
 319                 break;
 320         case WPS_AUTH_WPA:
 321                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 322                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 323                 ssid->proto = WPA_PROTO_WPA;
 324                 break;
 325         case WPS_AUTH_WPA2:
 326                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 327                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 328                 ssid->proto = WPA_PROTO_RSN;
 329                 break;
 330         case WPS_AUTH_WPA2PSK:
 331                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 332                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 333                 ssid->proto = WPA_PROTO_RSN;
 334                 break;
 335         }
 336
 337         if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
 338                 if (cred->key_len == 2 * PMK_LEN) {
 339                         if (hexstr2bin((const char *) cred->key, ssid->psk,
 340                                        PMK_LEN)) {
 341                                 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
 342                                            "Key");
 343                                 return -1;
 344                         }
 345                         ssid->psk_set = 1;
 346                 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
 347                         os_free(ssid->passphrase);
 348                         ssid->passphrase = os_malloc(cred->key_len + 1);
 349                         if (ssid->passphrase == NULL)
 350                                 return -1;
 351                         os_memcpy(ssid->passphrase, cred->key, cred->key_len);
 352                         ssid->passphrase[cred->key_len] = '\0';
 353                         wpa_config_update_psk(ssid);
 354                 } else {
 355                         wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
 356                                    "length %lu",
 357                                    (unsigned long) cred->key_len);
 358                         return -1;
 359                 }
 360         }
 361
 362         wpas_wps_security_workaround(wpa_s, ssid, cred);
 363
 364 #ifndef CONFIG_NO_CONFIG_WRITE
 365         if (wpa_s->conf->update_config &&
 366             wpa_config_write(wpa_s->confname, wpa_s->conf)) {
 367                 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
 368                 return -1;
 369         }
 370 #endif /* CONFIG_NO_CONFIG_WRITE */
 371
 372         return 0;
 373 }
 374
 375
 376 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
 377                                          struct wps_event_m2d *m2d)
 378 {
 379         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
 380                 "dev_password_id=%d config_error=%d",
 381                 m2d->dev_password_id, m2d->config_error);
 382         wpas_notify_wps_event_m2d(wpa_s, m2d);
 383 }
 384
 385
 386 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
 387                                           struct wps_event_fail *fail)
 388 {
 389         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
 390         wpas_clear_wps(wpa_s);
 391         wpas_notify_wps_event_fail(wpa_s, fail);
 392 }
 393
 394
 395 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
 396 {
 397         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
 398         wpa_s->wps_success = 1;
 399         wpas_notify_wps_event_success(wpa_s);
 400 }
 401
 402
 403 static void wpa_supplicant_wps_event_er_ap_add(struct wpa_supplicant *wpa_s,
 404                                                struct wps_event_er_ap *ap)
 405 {
 406         char uuid_str[100];
 407         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 408
 409         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 410         if (ap->pri_dev_type)
 411                 wps_dev_type_bin2str(ap->pri_dev_type, dev_type,
 412                                      sizeof(dev_type));
 413         else
 414                 dev_type[0] = '\0';
 415
 416         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s " MACSTR
 417                 " pri_dev_type=%s wps_state=%d |%s|%s|%s|%s|%s|%s|",
 418                 uuid_str, MAC2STR(ap->mac_addr), dev_type, ap->wps_state,
 419                 ap->friendly_name ? ap->friendly_name : "",
 420                 ap->manufacturer ? ap->manufacturer : "",
 421                 ap->model_description ? ap->model_description : "",
 422                 ap->model_name ? ap->model_name : "",
 423                 ap->manufacturer_url ? ap->manufacturer_url : "",
 424                 ap->model_url ? ap->model_url : "");
 425 }
 426
 427
 428 static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
 429                                                   struct wps_event_er_ap *ap)
 430 {
 431         char uuid_str[100];
 432         uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
 433         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
 434 }
 435
 436
 437 static void wpa_supplicant_wps_event_er_enrollee_add(
 438         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 439 {
 440         char uuid_str[100];
 441         char dev_type[WPS_DEV_TYPE_BUFSIZE];
 442
 443         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 444         if (enrollee->pri_dev_type)
 445                 wps_dev_type_bin2str(enrollee->pri_dev_type, dev_type,
 446                                      sizeof(dev_type));
 447         else
 448                 dev_type[0] = '\0';
 449
 450         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
 451                 " M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
 452                 "|%s|%s|%s|%s|%s|",
 453                 uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
 454                 enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
 455                 enrollee->dev_name ? enrollee->dev_name : "",
 456                 enrollee->manufacturer ? enrollee->manufacturer : "",
 457                 enrollee->model_name ? enrollee->model_name : "",
 458                 enrollee->model_number ? enrollee->model_number : "",
 459                 enrollee->serial_number ? enrollee->serial_number : "");
 460 }
 461
 462
 463 static void wpa_supplicant_wps_event_er_enrollee_remove(
 464         struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
 465 {
 466         char uuid_str[100];
 467         uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
 468         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
 469                 uuid_str, MAC2STR(enrollee->mac_addr));
 470 }
 471
 472
 473 static void wpa_supplicant_wps_event_er_ap_settings(
 474         struct wpa_supplicant *wpa_s,
 475         struct wps_event_er_ap_settings *ap_settings)
 476 {
 477         char uuid_str[100];
 478         char key_str[65];
 479         const struct wps_credential *cred = ap_settings->cred;
 480
 481         key_str[0] = '\0';
 482         if (cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
 483                 if (cred->key_len >= 8 && cred->key_len <= 64) {
 484                         os_memcpy(key_str, cred->key, cred->key_len);
 485                         key_str[cred->key_len] = '\0';
 486                 }
 487         }
 488
 489         uuid_bin2str(ap_settings->uuid, uuid_str, sizeof(uuid_str));
 490         /* Use wpa_msg_ctrl to avoid showing the key in debug log */
 491         wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_SETTINGS
 492                      "uuid=%s ssid=%s auth_type=0x%04x encr_type=0x%04x "
 493                      "key=%s",
 494                      uuid_str, wpa_ssid_txt(cred->ssid, cred->ssid_len),
 495                      cred->auth_type, cred->encr_type, key_str);
 496 }
 497
 498
 499 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 500                                      union wps_event_data *data)
 501 {
 502         struct wpa_supplicant *wpa_s = ctx;
 503         switch (event) {
 504         case WPS_EV_M2D:
 505                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 506                 break;
 507         case WPS_EV_FAIL:
 508                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 509                 break;
 510         case WPS_EV_SUCCESS:
 511                 wpa_supplicant_wps_event_success(wpa_s);
 512                 break;
 513         case WPS_EV_PWD_AUTH_FAIL:
 514                 break;
 515         case WPS_EV_PBC_OVERLAP:
 516                 break;
 517         case WPS_EV_PBC_TIMEOUT:
 518                 break;
 519         case WPS_EV_ER_AP_ADD:
 520                 wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
 521                 break;
 522         case WPS_EV_ER_AP_REMOVE:
 523                 wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
 524                 break;
 525         case WPS_EV_ER_ENROLLEE_ADD:
 526                 wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
 527                                                          &data->enrollee);
 528                 break;
 529         case WPS_EV_ER_ENROLLEE_REMOVE:
 530                 wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
 531                                                             &data->enrollee);
 532                 break;
 533         case WPS_EV_ER_AP_SETTINGS:
 534                 wpa_supplicant_wps_event_er_ap_settings(wpa_s,
 535                                                         &data->ap_settings);
 536                 break;
 537         }
 538 }
 539
 540
 541 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
 542 {
 543         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 544             eap_is_wps_pin_enrollee(&ssid->eap))
 545                 return WPS_REQ_ENROLLEE;
 546         else
 547                 return WPS_REQ_REGISTRAR;
 548 }
 549
 550
 551 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 552 {
 553         int id;
 554         struct wpa_ssid *ssid, *remove_ssid = NULL;
 555
 556         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 557
 558         /* Remove any existing WPS network from configuration */
 559         ssid = wpa_s->conf->ssid;
 560         while (ssid) {
 561                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 562                         if (ssid == wpa_s->current_ssid) {
 563                                 wpa_s->current_ssid = NULL;
 564                                 if (ssid != NULL)
 565                                         wpas_notify_network_changed(wpa_s);
 566                         }
 567                         id = ssid->id;
 568                         remove_ssid = ssid;
 569                 } else
 570                         id = -1;
 571                 ssid = ssid->next;
 572                 if (id >= 0) {
 573                         wpas_notify_network_removed(wpa_s, remove_ssid);
 574                         wpa_config_remove_network(wpa_s->conf, id);
 575                 }
 576         }
 577 }
 578
 579
 580 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 581 {
 582         struct wpa_supplicant *wpa_s = eloop_ctx;
 583         wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
 584                    "out");
 585         wpas_clear_wps(wpa_s);
 586 }
 587
 588
 589 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 590                                               int registrar, const u8 *bssid)
 591 {
 592         struct wpa_ssid *ssid;
 593
 594         ssid = wpa_config_add_network(wpa_s->conf);
 595         if (ssid == NULL)
 596                 return NULL;
 597         wpas_notify_network_added(wpa_s, ssid);
 598         wpa_config_set_network_defaults(ssid);
 599         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 600             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 601             wpa_config_set(ssid, "identity", registrar ?
 602                            "\"" WSC_ID_REGISTRAR "\"" :
 603                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 604                 wpas_notify_network_removed(wpa_s, ssid);
 605                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 606                 return NULL;
 607         }
 608
 609         if (bssid) {
 610 #ifndef CONFIG_P2P
 611                 struct wpa_bss *bss;
 612                 int count = 0;
 613 #endif /* CONFIG_P2P */
 614
 615                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 616                 ssid->bssid_set = 1;
 617
 618                 /*
 619                  * Note: With P2P, the SSID may change at the time the WPS
 620                  * provisioning is started, so better not filter the AP based
 621                  * on the current SSID in the scan results.
 622                  */
 623 #ifndef CONFIG_P2P
 624                 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 625                         if (os_memcmp(bssid, bss->bssid, ETH_ALEN) != 0)
 626                                 continue;
 627
 628                         os_free(ssid->ssid);
 629                         ssid->ssid = os_malloc(bss->ssid_len);
 630                         if (ssid->ssid == NULL)
 631                                 break;
 632                         os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 633                         ssid->ssid_len = bss->ssid_len;
 634                         wpa_hexdump_ascii(MSG_DEBUG, "WPS: Picked SSID from "
 635                                           "scan results",
 636                                           ssid->ssid, ssid->ssid_len);
 637                         count++;
 638                 }
 639
 640                 if (count > 1) {
 641                         wpa_printf(MSG_DEBUG, "WPS: More than one SSID found "
 642                                    "for the AP; use wildcard");
 643                         os_free(ssid->ssid);
 644                         ssid->ssid = NULL;
 645                         ssid->ssid_len = 0;
 646                 }
 647 #endif /* CONFIG_P2P */
 648         }
 649
 650         return ssid;
 651 }
 652
 653
 654 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 655                              struct wpa_ssid *selected)
 656 {
 657         struct wpa_ssid *ssid;
 658
 659         /* Mark all other networks disabled and trigger reassociation */
 660         ssid = wpa_s->conf->ssid;
 661         while (ssid) {
 662                 int was_disabled = ssid->disabled;
 663                 ssid->disabled = ssid != selected;
 664                 if (was_disabled != ssid->disabled)
 665                         wpas_notify_network_enabled_changed(wpa_s, ssid);
 666                 ssid = ssid->next;
 667         }
 668         wpa_s->disconnected = 0;
 669         wpa_s->reassociate = 1;
 670         wpa_s->scan_runs = 0;
 671         wpa_s->wps_success = 0;
 672         wpa_s->blacklist_cleared = 0;
 673         wpa_supplicant_req_scan(wpa_s, 0, 0);
 674 }
 675
 676
 677 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid,
 678                        int p2p_group)
 679 {
 680         struct wpa_ssid *ssid;
 681         wpas_clear_wps(wpa_s);
 682         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 683         if (ssid == NULL)
 684                 return -1;
 685         ssid->temporary = 1;
 686         ssid->p2p_group = p2p_group;
 687         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 688         if (wpa_s->wps_fragment_size)
 689                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 690         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 691                                wpa_s, NULL);
 692         wpas_wps_reassoc(wpa_s, ssid);
 693         return 0;
 694 }
 695
 696
 697 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 698                        const char *pin, int p2p_group)
 699 {
 700         struct wpa_ssid *ssid;
 701         char val[128];
 702         unsigned int rpin = 0;
 703
 704         wpas_clear_wps(wpa_s);
 705         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 706         if (ssid == NULL)
 707                 return -1;
 708         ssid->temporary = 1;
 709         ssid->p2p_group = p2p_group;
 710         if (pin)
 711                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 712         else {
 713                 rpin = wps_generate_pin();
 714                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 715         }
 716         wpa_config_set(ssid, "phase1", val, 0);
 717         if (wpa_s->wps_fragment_size)
 718                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 719         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 720                                wpa_s, NULL);
 721         wpas_wps_reassoc(wpa_s, ssid);
 722         return rpin;
 723 }
 724
 725
 726 #ifdef CONFIG_WPS_OOB
 727 int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
 728                        char *path, char *method, char *name)
 729 {
 730         struct wps_context *wps = wpa_s->wps;
 731         struct oob_device_data *oob_dev;
 732
 733         oob_dev = wps_get_oob_device(device_type);
 734         if (oob_dev == NULL)
 735                 return -1;
 736         oob_dev->device_path = path;
 737         oob_dev->device_name = name;
 738         wps->oob_conf.oob_method = wps_get_oob_method(method);
 739
 740         if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
 741                 /*
 742                  * Use pre-configured DH keys in order to be able to write the
 743                  * key hash into the OOB file.
 744                  */
 745                 wpabuf_free(wps->dh_pubkey);
 746                 wpabuf_free(wps->dh_privkey);
 747                 wps->dh_privkey = NULL;
 748                 wps->dh_pubkey = NULL;
 749                 dh5_free(wps->dh_ctx);
 750                 wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
 751                 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
 752                 if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
 753                         wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
 754                                    "Diffie-Hellman handshake");
 755                         return -1;
 756                 }
 757         }
 758
 759         if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
 760                 wpas_clear_wps(wpa_s);
 761
 762         if (wps_process_oob(wps, oob_dev, 0) < 0)
 763                 return -1;
 764
 765         if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
 766              wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
 767             wpas_wps_start_pin(wpa_s, NULL,
 768                                wpabuf_head(wps->oob_conf.dev_password), 0) < 0)
 769                         return -1;
 770
 771         return 0;
 772 }
 773 #endif /* CONFIG_WPS_OOB */
 774
 775
 776 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 777                        const char *pin, struct wps_new_ap_settings *settings)
 778 {
 779         struct wpa_ssid *ssid;
 780         char val[200];
 781         char *pos, *end;
 782         int res;
 783
 784         if (!pin)
 785                 return -1;
 786         wpas_clear_wps(wpa_s);
 787         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 788         if (ssid == NULL)
 789                 return -1;
 790         pos = val;
 791         end = pos + sizeof(val);
 792         res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
 793         if (res < 0 || res >= end - pos)
 794                 return -1;
 795         pos += res;
 796         if (settings) {
 797                 res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
 798                                   "new_encr=%s new_key=%s",
 799                                   settings->ssid_hex, settings->auth,
 800                                   settings->encr, settings->key_hex);
 801                 if (res < 0 || res >= end - pos)
 802                         return -1;
 803                 pos += res;
 804         }
 805         res = os_snprintf(pos, end - pos, "\"");
 806         if (res < 0 || res >= end - pos)
 807                 return -1;
 808         wpa_config_set(ssid, "phase1", val, 0);
 809         if (wpa_s->wps_fragment_size)
 810                 ssid->eap.fragment_size = wpa_s->wps_fragment_size;
 811         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 812                                wpa_s, NULL);
 813         wpas_wps_reassoc(wpa_s, ssid);
 814         return 0;
 815 }
 816
 817
 818 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
 819                                size_t psk_len)
 820 {
 821         wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
 822                    "STA " MACSTR, MAC2STR(mac_addr));
 823         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
 824
 825         /* TODO */
 826
 827         return 0;
 828 }
 829
 830
 831 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 832                                    const struct wps_device_data *dev)
 833 {
 834         char uuid[40], txt[400];
 835         int len;
 836         char devtype[WPS_DEV_TYPE_BUFSIZE];
 837         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 838                 return;
 839         wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
 840         len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
 841                           " [%s|%s|%s|%s|%s|%s]",
 842                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 843                           dev->manufacturer, dev->model_name,
 844                           dev->model_number, dev->serial_number,
 845                           wps_dev_type_bin2str(dev->pri_dev_type, devtype,
 846                                                sizeof(devtype)));
 847         if (len > 0 && len < (int) sizeof(txt))
 848                 wpa_printf(MSG_INFO, "%s", txt);
 849 }
 850
 851
 852 static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
 853                                     u16 sel_reg_config_methods)
 854 {
 855 #ifdef CONFIG_WPS_ER
 856         struct wpa_supplicant *wpa_s = ctx;
 857
 858         if (wpa_s->wps_er == NULL)
 859                 return;
 860         wpa_printf(MSG_DEBUG, "WPS ER: SetSelectedRegistrar - sel_reg=%d "
 861                    "dev_password_id=%u sel_reg_config_methods=0x%x",
 862                    sel_reg, dev_passwd_id, sel_reg_config_methods);
 863         wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
 864                            sel_reg_config_methods);
 865 #endif /* CONFIG_WPS_ER */
 866 }
 867
 868
 869 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 870 {
 871         struct wps_context *wps;
 872         struct wps_registrar_config rcfg;
 873
 874         wps = os_zalloc(sizeof(*wps));
 875         if (wps == NULL)
 876                 return -1;
 877
 878         wps->cred_cb = wpa_supplicant_wps_cred;
 879         wps->event_cb = wpa_supplicant_wps_event;
 880         wps->cb_ctx = wpa_s;
 881
 882         wps->dev.device_name = wpa_s->conf->device_name;
 883         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 884         wps->dev.model_name = wpa_s->conf->model_name;
 885         wps->dev.model_number = wpa_s->conf->model_number;
 886         wps->dev.serial_number = wpa_s->conf->serial_number;
 887         wps->config_methods =
 888                 wps_config_methods_str2bin(wpa_s->conf->config_methods);
 889         if ((wps->config_methods & (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
 890             (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
 891                 wpa_printf(MSG_ERROR, "WPS: Both Label and Display config "
 892                            "methods are not allowed at the same time");
 893                 os_free(wps);
 894                 return -1;
 895         }
 896         if (wpa_s->conf->device_type &&
 897             wps_dev_type_str2bin(wpa_s->conf->device_type,
 898                                  wps->dev.pri_dev_type) < 0) {
 899                 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 900                 os_free(wps);
 901                 return -1;
 902         }
 903         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 904         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 905         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 906         if (is_nil_uuid(wpa_s->conf->uuid)) {
 907                 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
 908                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 909                             wps->uuid, WPS_UUID_LEN);
 910         } else
 911                 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
 912
 913         wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 914         wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 915
 916         os_memset(&rcfg, 0, sizeof(rcfg));
 917         rcfg.new_psk_cb = wpas_wps_new_psk_cb;
 918         rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
 919         rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
 920         rcfg.cb_ctx = wpa_s;
 921
 922         wps->registrar = wps_registrar_init(wps, &rcfg);
 923         if (wps->registrar == NULL) {
 924                 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
 925                 os_free(wps);
 926                 return -1;
 927         }
 928
 929         wpa_s->wps = wps;
 930
 931         return 0;
 932 }
 933
 934
 935 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 936 {
 937         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 938
 939         if (wpa_s->wps == NULL)
 940                 return;
 941
 942 #ifdef CONFIG_WPS_ER
 943         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
 944         wpa_s->wps_er = NULL;
 945 #endif /* CONFIG_WPS_ER */
 946
 947         wps_registrar_deinit(wpa_s->wps->registrar);
 948         wpabuf_free(wpa_s->wps->dh_pubkey);
 949         wpabuf_free(wpa_s->wps->dh_privkey);
 950         wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
 951         wpabuf_free(wpa_s->wps->oob_conf.dev_password);
 952         os_free(wpa_s->wps->network_key);
 953         os_free(wpa_s->wps);
 954         wpa_s->wps = NULL;
 955 }
 956
 957
 958 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
 959                             struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 960 {
 961         struct wpabuf *wps_ie;
 962
 963         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 964                 return -1;
 965
 966         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 967         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 968                 if (!wps_ie) {
 969                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 970                         return 0;
 971                 }
 972
 973                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 974                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 975                                    "without active PBC Registrar");
 976                         wpabuf_free(wps_ie);
 977                         return 0;
 978                 }
 979
 980                 /* TODO: overlap detection */
 981                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 982                            "(Active PBC)");
 983                 wpabuf_free(wps_ie);
 984                 return 1;
 985         }
 986
 987         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 988                 if (!wps_ie) {
 989                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 990                         return 0;
 991                 }
 992
 993                 /*
 994                  * Start with WPS APs that advertise our address as an
 995                  * authorized MAC (v2.0) or active PIN Registrar (v1.0) and
 996                  * allow any WPS AP after couple of scans since some APs do not
 997                  * set Selected Registrar attribute properly when using
 998                  * external Registrar.
 999                  */
1000                 if (!wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1)) {
1001                         if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
1002                                 wpa_printf(MSG_DEBUG, "   skip - WPS AP "
1003                                            "without active PIN Registrar");
1004                                 wpabuf_free(wps_ie);
1005                                 return 0;
1006                         }
1007                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1008                 } else {
1009                         wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
1010                                    "(Authorized MAC or Active PIN)");
1011                 }
1012                 wpabuf_free(wps_ie);
1013                 return 1;
1014         }
1015
1016         if (wps_ie) {
1017                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
1018                 wpabuf_free(wps_ie);
1019                 return 1;
1020         }
1021
1022         return -1;
1023 }
1024
1025
1026 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
1027                               struct wpa_ssid *ssid,
1028                               struct wpa_scan_res *bss)
1029 {
1030         struct wpabuf *wps_ie = NULL;
1031         int ret = 0;
1032
1033         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
1034                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1035                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
1036                         /* allow wildcard SSID for WPS PBC */
1037                         ret = 1;
1038                 }
1039         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
1040                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1041                 if (wps_ie &&
1042                     (wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1) ||
1043                      wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
1044                         /* allow wildcard SSID for WPS PIN */
1045                         ret = 1;
1046                 }
1047         }
1048
1049         if (!ret && ssid->bssid_set &&
1050             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
1051                 /* allow wildcard SSID due to hardcoded BSSID match */
1052                 ret = 1;
1053         }
1054
1055 #ifdef CONFIG_WPS_STRICT
1056         if (wps_ie) {
1057                 if (wps_validate_beacon_probe_resp(wps_ie, bss->beacon_ie_len >
1058                                                    0) < 0)
1059                         ret = 0;
1060                 if (bss->beacon_ie_len) {
1061                         struct wpabuf *bcn_wps;
1062                         bcn_wps = wpa_scan_get_vendor_ie_multi_beacon(
1063                                 bss, WPS_IE_VENDOR_TYPE);
1064                         if (bcn_wps == NULL) {
1065                                 wpa_printf(MSG_DEBUG, "WPS: Mandatory WPS IE "
1066                                            "missing from AP Beacon");
1067                                 ret = 0;
1068                         } else {
1069                                 if (wps_validate_beacon(wps_ie) < 0)
1070                                         ret = 0;
1071                                 wpabuf_free(bcn_wps);
1072                         }
1073                 }
1074         }
1075 #endif /* CONFIG_WPS_STRICT */
1076
1077         wpabuf_free(wps_ie);
1078
1079         return ret;
1080 }
1081
1082
1083 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
1084                               struct wpa_bss *selected, struct wpa_ssid *ssid)
1085 {
1086         const u8 *sel_uuid, *uuid;
1087         struct wpabuf *wps_ie;
1088         int ret = 0;
1089         struct wpa_bss *bss;
1090
1091         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
1092                 return 0;
1093
1094         /* Make sure that only one AP is in active PBC mode */
1095         wps_ie = wpa_bss_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
1096         if (wps_ie)
1097                 sel_uuid = wps_get_uuid_e(wps_ie);
1098         else
1099                 sel_uuid = NULL;
1100
1101         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1102                 struct wpabuf *ie;
1103                 if (bss == selected)
1104                         continue;
1105                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1106                 if (!ie)
1107                         continue;
1108                 if (!wps_is_selected_pbc_registrar(ie)) {
1109                         wpabuf_free(ie);
1110                         continue;
1111                 }
1112                 uuid = wps_get_uuid_e(ie);
1113                 if (sel_uuid == NULL || uuid == NULL ||
1114                     os_memcmp(sel_uuid, uuid, 16) != 0) {
1115                         ret = 1; /* PBC overlap */
1116                         wpabuf_free(ie);
1117                         break;
1118                 }
1119
1120                 /* TODO: verify that this is reasonable dual-band situation */
1121
1122                 wpabuf_free(ie);
1123         }
1124
1125         wpabuf_free(wps_ie);
1126
1127         return ret;
1128 }
1129
1130
1131 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
1132 {
1133         struct wpa_bss *bss;
1134
1135         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
1136                 return;
1137
1138         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1139                 struct wpabuf *ie;
1140                 ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
1141                 if (!ie)
1142                         continue;
1143                 if (wps_is_selected_pbc_registrar(ie))
1144                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1145                                      WPS_EVENT_AP_AVAILABLE_PBC);
1146                 else if (wps_is_addr_authorized(ie, wpa_s->own_addr, 0))
1147                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1148                                      WPS_EVENT_AP_AVAILABLE_AUTH);
1149                 else if (wps_is_selected_pin_registrar(ie))
1150                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1151                                      WPS_EVENT_AP_AVAILABLE_PIN);
1152                 else
1153                         wpa_msg_ctrl(wpa_s, MSG_INFO,
1154                                      WPS_EVENT_AP_AVAILABLE);
1155                 wpabuf_free(ie);
1156                 break;
1157         }
1158 }
1159
1160
1161 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
1162 {
1163         struct wpa_ssid *ssid;
1164
1165         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1166                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
1167                         return 1;
1168         }
1169
1170         return 0;
1171 }
1172
1173
1174 int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
1175                               char *end)
1176 {
1177         struct wpabuf *wps_ie;
1178         int ret;
1179
1180         wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
1181         if (wps_ie == NULL)
1182                 return 0;
1183
1184         ret = wps_attr_text(wps_ie, buf, end);
1185         wpabuf_free(wps_ie);
1186         return ret;
1187 }
1188
1189
1190 int wpas_wps_er_start(struct wpa_supplicant *wpa_s, const char *filter)
1191 {
1192 #ifdef CONFIG_WPS_ER
1193         if (wpa_s->wps_er) {
1194                 wps_er_refresh(wpa_s->wps_er);
1195                 return 0;
1196         }
1197         wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname, filter);
1198         if (wpa_s->wps_er == NULL)
1199                 return -1;
1200         return 0;
1201 #else /* CONFIG_WPS_ER */
1202         return 0;
1203 #endif /* CONFIG_WPS_ER */
1204 }
1205
1206
1207 int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
1208 {
1209 #ifdef CONFIG_WPS_ER
1210         wps_er_deinit(wpa_s->wps_er, NULL, NULL);
1211         wpa_s->wps_er = NULL;
1212 #endif /* CONFIG_WPS_ER */
1213         return 0;
1214 }
1215
1216
1217 #ifdef CONFIG_WPS_ER
1218 int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const u8 *addr,
1219                         const char *uuid, const char *pin)
1220 {
1221         u8 u[UUID_LEN];
1222         int any = 0;
1223
1224         if (os_strcmp(uuid, "any") == 0)
1225                 any = 1;
1226         else if (uuid_str2bin(uuid, u))
1227                 return -1;
1228         return wps_registrar_add_pin(wpa_s->wps->registrar, addr,
1229                                      any ? NULL : u,
1230                                      (const u8 *) pin, os_strlen(pin), 300);
1231 }
1232
1233
1234 int wpas_wps_er_pbc(struct wpa_supplicant *wpa_s, const char *uuid)
1235 {
1236         u8 u[UUID_LEN];
1237
1238         if (uuid_str2bin(uuid, u))
1239                 return -1;
1240         return wps_er_pbc(wpa_s->wps_er, u);
1241 }
1242
1243
1244 int wpas_wps_er_learn(struct wpa_supplicant *wpa_s, const char *uuid,
1245                       const char *pin)
1246 {
1247         u8 u[UUID_LEN];
1248
1249         if (uuid_str2bin(uuid, u))
1250                 return -1;
1251         return wps_er_learn(wpa_s->wps_er, u, (const u8 *) pin,
1252                             os_strlen(pin));
1253 }
1254
1255
1256 int wpas_wps_er_config(struct wpa_supplicant *wpa_s, const char *uuid,
1257                        const char *pin, struct wps_new_ap_settings *settings)
1258 {
1259         u8 u[UUID_LEN];
1260         struct wps_credential cred;
1261         size_t len;
1262
1263         if (uuid_str2bin(uuid, u))
1264                 return -1;
1265         if (settings->ssid_hex == NULL || settings->auth == NULL ||
1266             settings->encr == NULL || settings->key_hex == NULL)
1267                 return -1;
1268
1269         os_memset(&cred, 0, sizeof(cred));
1270         len = os_strlen(settings->ssid_hex);
1271         if ((len & 1) || len > 2 * sizeof(cred.ssid) ||
1272             hexstr2bin(settings->ssid_hex, cred.ssid, len / 2))
1273                 return -1;
1274         cred.ssid_len = len / 2;
1275
1276         len = os_strlen(settings->key_hex);
1277         if ((len & 1) || len > 2 * sizeof(cred.key) ||
1278             hexstr2bin(settings->key_hex, cred.key, len / 2))
1279                 return -1;
1280         cred.key_len = len / 2;
1281
1282         if (os_strcmp(settings->auth, "OPEN") == 0)
1283                 cred.auth_type = WPS_AUTH_OPEN;
1284         else if (os_strcmp(settings->auth, "WPAPSK") == 0)
1285                 cred.auth_type = WPS_AUTH_WPAPSK;
1286         else if (os_strcmp(settings->auth, "WPA2PSK") == 0)
1287                 cred.auth_type = WPS_AUTH_WPA2PSK;
1288         else
1289                 return -1;
1290
1291         if (os_strcmp(settings->encr, "NONE") == 0)
1292                 cred.encr_type = WPS_ENCR_NONE;
1293         else if (os_strcmp(settings->encr, "WEP") == 0)
1294                 cred.encr_type = WPS_ENCR_WEP;
1295         else if (os_strcmp(settings->encr, "TKIP") == 0)
1296                 cred.encr_type = WPS_ENCR_TKIP;
1297         else if (os_strcmp(settings->encr, "CCMP") == 0)
1298                 cred.encr_type = WPS_ENCR_AES;
1299         else
1300                 return -1;
1301
1302         return wps_er_config(wpa_s->wps_er, u, (const u8 *) pin,
1303                              os_strlen(pin), &cred);
1304 }
1305
1306
1307 static void wpas_wps_terminate_cb(void *ctx)
1308 {
1309         wpa_printf(MSG_DEBUG, "WPS ER: Terminated");
1310         eloop_terminate();
1311 }
1312 #endif /* CONFIG_WPS_ER */
1313
1314
1315 int wpas_wps_terminate_pending(struct wpa_supplicant *wpa_s)
1316 {
1317 #ifdef CONFIG_WPS_ER
1318         if (wpa_s->wps_er) {
1319                 wps_er_deinit(wpa_s->wps_er, wpas_wps_terminate_cb, wpa_s);
1320                 wpa_s->wps_er = NULL;
1321                 return 1;
1322         }
1323 #endif /* CONFIG_WPS_ER */
1324         return 0;
1325 }
1326
1327
1328 int wpas_wps_in_progress(struct wpa_supplicant *wpa_s)
1329 {
1330         struct wpa_ssid *ssid;
1331
1332         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1333                 if (!ssid->disabled && ssid->key_mgmt == WPA_KEY_MGMT_WPS)
1334                         return 1;
1335         }
1336
1337         return 0;
1338 }
1339
1340
1341 void wpas_wps_update_config(struct wpa_supplicant *wpa_s)
1342 {
1343         struct wps_context *wps = wpa_s->wps;
1344
1345         if (wps == NULL)
1346                 return;
1347
1348         if (wpa_s->conf->changed_parameters & CFG_CHANGED_CONFIG_METHODS) {
1349                 wps->config_methods = wps_config_methods_str2bin(
1350                         wpa_s->conf->config_methods);
1351                 if ((wps->config_methods &
1352                      (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
1353                     (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
1354                         wpa_printf(MSG_ERROR, "WPS: Both Label and Display "
1355                                    "config methods are not allowed at the "
1356                                    "same time");
1357                         wps->config_methods &= ~WPS_CONFIG_LABEL;
1358                 }
1359         }
1360
1361         if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_TYPE) {
1362                 if (wpa_s->conf->device_type &&
1363                     wps_dev_type_str2bin(wpa_s->conf->device_type,
1364                                          wps->dev.pri_dev_type) < 0)
1365                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
1366         }
1367
1368         if (wpa_s->conf->changed_parameters & CFG_CHANGED_OS_VERSION)
1369                 wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
1370
1371         if (wpa_s->conf->changed_parameters & CFG_CHANGED_UUID) {
1372                 if (is_nil_uuid(wpa_s->conf->uuid)) {
1373                         uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
1374                         wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
1375                                     "address", wps->uuid, WPS_UUID_LEN);
1376                 } else
1377                         os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
1378         }
1379 }