1 /* 2 * wpa_supplicant / WPS integration 3 * Copyright (c) 2008, Jouni Malinen <j (at) 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 "eloop.h" 24 #include "uuid.h" 25 #include "wpa_ctrl.h" 26 #include "ctrl_iface_dbus.h" 27 #include "eap_common/eap_wsc_common.h" 28 #include "blacklist.h" 29 #include "wpa.h" 30 #include "wps_supplicant.h" 31 32 33 #define WPS_PIN_SCAN_IGNORE_SEL_REG 3 34 35 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx); 36 static void wpas_clear_wps(struct wpa_supplicant *wpa_s); 37 38 39 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s) 40 { 41 if (!wpa_s->wps_success && 42 wpa_s->current_ssid && 43 eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) { 44 const u8 *bssid = wpa_s->bssid; 45 if (is_zero_ether_addr(bssid)) 46 bssid = wpa_s->pending_bssid; 47 48 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR 49 " did not succeed - continue trying to find " 50 "suitable AP", MAC2STR(bssid)); 51 wpa_blacklist_add(wpa_s, bssid); 52 53 wpa_supplicant_deauthenticate(wpa_s, 54 WLAN_REASON_DEAUTH_LEAVING); 55 wpa_s->reassociate = 1; 56 wpa_supplicant_req_scan(wpa_s, 57 wpa_s->blacklist_cleared ? 5 : 0, 0); 58 wpa_s->blacklist_cleared = 0; 59 return 1; 60 } 61 62 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL); 63 64 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid && 65 !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) { 66 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - " 67 "try to associate with the received credential"); 68 wpa_supplicant_deauthenticate(wpa_s, 69 WLAN_REASON_DEAUTH_LEAVING); 70 wpa_s->reassociate = 1; 71 wpa_supplicant_req_scan(wpa_s, 0, 0); 72 return 1; 73 } 74 75 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) { 76 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting " 77 "for external credential processing"); 78 wpas_clear_wps(wpa_s); 79 wpa_supplicant_deauthenticate(wpa_s, 80 WLAN_REASON_DEAUTH_LEAVING); 81 return 1; 82 } 83 84 return 0; 85 } 86 87 88 static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s, 89 struct wpa_ssid *ssid, 90 const struct wps_credential *cred) 91 { 92 struct wpa_driver_capa capa; 93 size_t i; 94 struct wpa_scan_res *bss = NULL; 95 const u8 *ie; 96 struct wpa_ie_data adv; 97 int wpa2 = 0, ccmp = 0; 98 99 /* 100 * Many existing WPS APs do not know how to negotiate WPA2 or CCMP in 101 * case they are configured for mixed mode operation (WPA+WPA2 and 102 * TKIP+CCMP). Try to use scan results to figure out whether the AP 103 * actually supports stronger security and select that if the client 104 * has support for it, too. 105 */ 106 107 if (wpa_drv_get_capa(wpa_s, &capa)) 108 return; /* Unknown what driver supports */ 109 110 if (wpa_supplicant_get_scan_results(wpa_s) || wpa_s->scan_res == NULL) 111 return; /* Could not get scan results for checking advertised 112 * parameters */ 113 114 for (i = 0; i < wpa_s->scan_res->num; i++) { 115 bss = wpa_s->scan_res->res[i]; 116 if (os_memcmp(bss->bssid, cred->mac_addr, ETH_ALEN) != 0) 117 continue; 118 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID); 119 if (ie == NULL) 120 continue; 121 if (ie[1] != ssid->ssid_len || ssid->ssid == NULL || 122 os_memcmp(ie + 2, ssid->ssid, ssid->ssid_len) != 0) 123 continue; 124 125 wpa_printf(MSG_DEBUG, "WPS: AP found from scan results"); 126 break; 127 } 128 129 if (i == wpa_s->scan_res->num) { 130 wpa_printf(MSG_DEBUG, "WPS: The AP was not found from scan " 131 "results - use credential as-is"); 132 return; 133 } 134 135 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN); 136 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) { 137 wpa2 = 1; 138 if (adv.pairwise_cipher & WPA_CIPHER_CCMP) 139 ccmp = 1; 140 } else { 141 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE); 142 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 && 143 adv.pairwise_cipher & WPA_CIPHER_CCMP) 144 ccmp = 1; 145 } 146 147 if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) && 148 (ssid->pairwise_cipher & WPA_CIPHER_TKIP)) { 149 /* 150 * TODO: This could be the initial AP configuration and the 151 * Beacon contents could change shortly. Should request a new 152 * scan and delay addition of the network until the updated 153 * scan results are available. 154 */ 155 wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA " 156 "support - use credential as-is"); 157 return; 158 } 159 160 if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) && 161 (ssid->pairwise_cipher & WPA_CIPHER_TKIP) && 162 (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) { 163 wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential " 164 "based on scan results"); 165 if (wpa_s->conf->ap_scan == 1) 166 ssid->pairwise_cipher |= WPA_CIPHER_CCMP; 167 else 168 ssid->pairwise_cipher = WPA_CIPHER_CCMP; 169 } 170 171 if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) && 172 (ssid->proto & WPA_PROTO_WPA) && 173 (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) { 174 wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential " 175 "based on scan results"); 176 if (wpa_s->conf->ap_scan == 1) 177 ssid->proto |= WPA_PROTO_RSN; 178 else 179 ssid->proto = WPA_PROTO_RSN; 180 } 181 } 182 183 184 static int wpa_supplicant_wps_cred(void *ctx, 185 const struct wps_credential *cred) 186 { 187 struct wpa_supplicant *wpa_s = ctx; 188 struct wpa_ssid *ssid = wpa_s->current_ssid; 189 u8 key_idx = 0; 190 u16 auth_type; 191 192 if ((wpa_s->conf->wps_cred_processing == 1 || 193 wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) { 194 size_t blen = cred->cred_attr_len * 2 + 1; 195 char *buf = os_malloc(blen); 196 if (buf) { 197 wpa_snprintf_hex(buf, blen, 198 cred->cred_attr, cred->cred_attr_len); 199 wpa_msg(wpa_s, MSG_INFO, "%s%s", 200 WPS_EVENT_CRED_RECEIVED, buf); 201 os_free(buf); 202 } 203 wpa_supplicant_dbus_notify_wps_cred(wpa_s, cred); 204 } else 205 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED); 206 207 wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute", 208 cred->cred_attr, cred->cred_attr_len); 209 210 if (wpa_s->conf->wps_cred_processing == 1) 211 return 0; 212 213 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len); 214 wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x", 215 cred->auth_type); 216 wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type); 217 wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx); 218 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 219 cred->key, cred->key_len); 220 wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR, 221 MAC2STR(cred->mac_addr)); 222 223 auth_type = cred->auth_type; 224 if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 225 wpa_printf(MSG_DEBUG, "WPS: Workaround - convert mixed-mode " 226 "auth_type into WPA2PSK"); 227 auth_type = WPS_AUTH_WPA2PSK; 228 } 229 230 if (auth_type != WPS_AUTH_OPEN && 231 auth_type != WPS_AUTH_SHARED && 232 auth_type != WPS_AUTH_WPAPSK && 233 auth_type != WPS_AUTH_WPA2PSK) { 234 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for " 235 "unsupported authentication type 0x%x", 236 auth_type); 237 return 0; 238 } 239 240 if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) { 241 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based " 242 "on the received credential"); 243 os_free(ssid->eap.identity); 244 ssid->eap.identity = NULL; 245 ssid->eap.identity_len = 0; 246 os_free(ssid->eap.phase1); 247 ssid->eap.phase1 = NULL; 248 os_free(ssid->eap.eap_methods); 249 ssid->eap.eap_methods = NULL; 250 } else { 251 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the " 252 "received credential"); 253 ssid = wpa_config_add_network(wpa_s->conf); 254 if (ssid == NULL) 255 return -1; 256 } 257 258 wpa_config_set_network_defaults(ssid); 259 260 os_free(ssid->ssid); 261 ssid->ssid = os_malloc(cred->ssid_len); 262 if (ssid->ssid) { 263 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len); 264 ssid->ssid_len = cred->ssid_len; 265 } 266 267 switch (cred->encr_type) { 268 case WPS_ENCR_NONE: 269 break; 270 case WPS_ENCR_WEP: 271 if (cred->key_len <= 0) 272 break; 273 if (cred->key_len != 5 && cred->key_len != 13 && 274 cred->key_len != 10 && cred->key_len != 26) { 275 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length " 276 "%lu", (unsigned long) cred->key_len); 277 return -1; 278 } 279 if (cred->key_idx > NUM_WEP_KEYS) { 280 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d", 281 cred->key_idx); 282 return -1; 283 } 284 if (cred->key_idx) 285 key_idx = cred->key_idx - 1; 286 if (cred->key_len == 10 || cred->key_len == 26) { 287 if (hexstr2bin((char *) cred->key, 288 ssid->wep_key[key_idx], 289 cred->key_len / 2) < 0) { 290 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key " 291 "%d", key_idx); 292 return -1; 293 } 294 ssid->wep_key_len[key_idx] = cred->key_len / 2; 295 } else { 296 os_memcpy(ssid->wep_key[key_idx], cred->key, 297 cred->key_len); 298 ssid->wep_key_len[key_idx] = cred->key_len; 299 } 300 ssid->wep_tx_keyidx = key_idx; 301 break; 302 case WPS_ENCR_TKIP: 303 ssid->pairwise_cipher = WPA_CIPHER_TKIP; 304 break; 305 case WPS_ENCR_AES: 306 ssid->pairwise_cipher = WPA_CIPHER_CCMP; 307 break; 308 } 309 310 switch (auth_type) { 311 case WPS_AUTH_OPEN: 312 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 313 ssid->key_mgmt = WPA_KEY_MGMT_NONE; 314 ssid->proto = 0; 315 break; 316 case WPS_AUTH_SHARED: 317 ssid->auth_alg = WPA_AUTH_ALG_SHARED; 318 ssid->key_mgmt = WPA_KEY_MGMT_NONE; 319 ssid->proto = 0; 320 break; 321 case WPS_AUTH_WPAPSK: 322 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 323 ssid->key_mgmt = WPA_KEY_MGMT_PSK; 324 ssid->proto = WPA_PROTO_WPA; 325 break; 326 case WPS_AUTH_WPA: 327 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 328 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 329 ssid->proto = WPA_PROTO_WPA; 330 break; 331 case WPS_AUTH_WPA2: 332 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 333 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 334 ssid->proto = WPA_PROTO_RSN; 335 break; 336 case WPS_AUTH_WPA2PSK: 337 ssid->auth_alg = WPA_AUTH_ALG_OPEN; 338 ssid->key_mgmt = WPA_KEY_MGMT_PSK; 339 ssid->proto = WPA_PROTO_RSN; 340 break; 341 } 342 343 if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) { 344 if (cred->key_len == 2 * PMK_LEN) { 345 if (hexstr2bin((const char *) cred->key, ssid->psk, 346 PMK_LEN)) { 347 wpa_printf(MSG_ERROR, "WPS: Invalid Network " 348 "Key"); 349 return -1; 350 } 351 ssid->psk_set = 1; 352 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) { 353 os_free(ssid->passphrase); 354 ssid->passphrase = os_malloc(cred->key_len + 1); 355 if (ssid->passphrase == NULL) 356 return -1; 357 os_memcpy(ssid->passphrase, cred->key, cred->key_len); 358 ssid->passphrase[cred->key_len] = '\0'; 359 wpa_config_update_psk(ssid); 360 } else { 361 wpa_printf(MSG_ERROR, "WPS: Invalid Network Key " 362 "length %lu", 363 (unsigned long) cred->key_len); 364 return -1; 365 } 366 } 367 368 wpas_wps_security_workaround(wpa_s, ssid, cred); 369 370 #ifndef CONFIG_NO_CONFIG_WRITE 371 if (wpa_s->conf->update_config && 372 wpa_config_write(wpa_s->confname, wpa_s->conf)) { 373 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration"); 374 return -1; 375 } 376 #endif /* CONFIG_NO_CONFIG_WRITE */ 377 378 return 0; 379 } 380 381 382 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s, 383 struct wps_event_m2d *m2d) 384 { 385 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D 386 "dev_password_id=%d config_error=%d", 387 m2d->dev_password_id, m2d->config_error); 388 } 389 390 391 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s, 392 struct wps_event_fail *fail) 393 { 394 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg); 395 wpas_clear_wps(wpa_s); 396 } 397 398 399 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s) 400 { 401 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS); 402 wpa_s->wps_success = 1; 403 } 404 405 406 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event, 407 union wps_event_data *data) 408 { 409 struct wpa_supplicant *wpa_s = ctx; 410 switch (event) { 411 case WPS_EV_M2D: 412 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d); 413 break; 414 case WPS_EV_FAIL: 415 wpa_supplicant_wps_event_fail(wpa_s, &data->fail); 416 break; 417 case WPS_EV_SUCCESS: 418 wpa_supplicant_wps_event_success(wpa_s); 419 break; 420 case WPS_EV_PWD_AUTH_FAIL: 421 break; 422 case WPS_EV_PBC_OVERLAP: 423 break; 424 case WPS_EV_PBC_TIMEOUT: 425 break; 426 } 427 } 428 429 430 enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid) 431 { 432 if (eap_is_wps_pbc_enrollee(&ssid->eap) || 433 eap_is_wps_pin_enrollee(&ssid->eap)) 434 return WPS_REQ_ENROLLEE; 435 else 436 return WPS_REQ_REGISTRAR; 437 } 438 439 440 static void wpas_clear_wps(struct wpa_supplicant *wpa_s) 441 { 442 int id; 443 struct wpa_ssid *ssid; 444 445 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL); 446 447 /* Remove any existing WPS network from configuration */ 448 ssid = wpa_s->conf->ssid; 449 while (ssid) { 450 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 451 if (ssid == wpa_s->current_ssid) 452 wpa_s->current_ssid = NULL; 453 id = ssid->id; 454 } else 455 id = -1; 456 ssid = ssid->next; 457 if (id >= 0) 458 wpa_config_remove_network(wpa_s->conf, id); 459 } 460 } 461 462 463 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx) 464 { 465 struct wpa_supplicant *wpa_s = eloop_ctx; 466 wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed " 467 "out"); 468 wpas_clear_wps(wpa_s); 469 } 470 471 472 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s, 473 int registrar, const u8 *bssid) 474 { 475 struct wpa_ssid *ssid; 476 477 ssid = wpa_config_add_network(wpa_s->conf); 478 if (ssid == NULL) 479 return NULL; 480 wpa_config_set_network_defaults(ssid); 481 if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 || 482 wpa_config_set(ssid, "eap", "WSC", 0) < 0 || 483 wpa_config_set(ssid, "identity", registrar ? 484 "\"" WSC_ID_REGISTRAR "\"" : 485 "\"" WSC_ID_ENROLLEE "\"", 0) < 0) { 486 wpa_config_remove_network(wpa_s->conf, ssid->id); 487 return NULL; 488 } 489 490 if (bssid) { 491 size_t i; 492 int count = 0; 493 494 os_memcpy(ssid->bssid, bssid, ETH_ALEN); 495 ssid->bssid_set = 1; 496 497 /* Try to get SSID from scan results */ 498 if (wpa_s->scan_res == NULL && 499 wpa_supplicant_get_scan_results(wpa_s) < 0) 500 return ssid; /* Could not find any scan results */ 501 502 for (i = 0; i < wpa_s->scan_res->num; i++) { 503 const u8 *ie; 504 struct wpa_scan_res *res; 505 506 res = wpa_s->scan_res->res[i]; 507 if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0) 508 continue; 509 510 ie = wpa_scan_get_ie(res, WLAN_EID_SSID); 511 if (ie == NULL) 512 break; 513 os_free(ssid->ssid); 514 ssid->ssid = os_malloc(ie[1]); 515 if (ssid->ssid == NULL) 516 break; 517 os_memcpy(ssid->ssid, ie + 2, ie[1]); 518 ssid->ssid_len = ie[1]; 519 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Picked SSID from " 520 "scan results", 521 ssid->ssid, ssid->ssid_len); 522 count++; 523 } 524 525 if (count > 1) { 526 wpa_printf(MSG_DEBUG, "WPS: More than one SSID found " 527 "for the AP; use wildcard"); 528 os_free(ssid->ssid); 529 ssid->ssid = NULL; 530 ssid->ssid_len = 0; 531 } 532 } 533 534 return ssid; 535 } 536 537 538 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s, 539 struct wpa_ssid *selected) 540 { 541 struct wpa_ssid *ssid; 542 543 /* Mark all other networks disabled and trigger reassociation */ 544 ssid = wpa_s->conf->ssid; 545 while (ssid) { 546 ssid->disabled = ssid != selected; 547 ssid = ssid->next; 548 } 549 wpa_s->disconnected = 0; 550 wpa_s->reassociate = 1; 551 wpa_s->scan_runs = 0; 552 wpa_s->wps_success = 0; 553 wpa_s->blacklist_cleared = 0; 554 wpa_supplicant_req_scan(wpa_s, 0, 0); 555 } 556 557 558 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid) 559 { 560 struct wpa_ssid *ssid; 561 wpas_clear_wps(wpa_s); 562 ssid = wpas_wps_add_network(wpa_s, 0, bssid); 563 if (ssid == NULL) 564 return -1; 565 wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0); 566 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout, 567 wpa_s, NULL); 568 wpas_wps_reassoc(wpa_s, ssid); 569 return 0; 570 } 571 572 573 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid, 574 const char *pin) 575 { 576 struct wpa_ssid *ssid; 577 char val[30]; 578 unsigned int rpin = 0; 579 580 wpas_clear_wps(wpa_s); 581 ssid = wpas_wps_add_network(wpa_s, 0, bssid); 582 if (ssid == NULL) 583 return -1; 584 if (pin) 585 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin); 586 else { 587 rpin = wps_generate_pin(); 588 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin); 589 } 590 wpa_config_set(ssid, "phase1", val, 0); 591 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout, 592 wpa_s, NULL); 593 wpas_wps_reassoc(wpa_s, ssid); 594 return rpin; 595 } 596 597 598 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid, 599 const char *pin) 600 { 601 struct wpa_ssid *ssid; 602 char val[30]; 603 604 if (!pin) 605 return -1; 606 wpas_clear_wps(wpa_s); 607 ssid = wpas_wps_add_network(wpa_s, 1, bssid); 608 if (ssid == NULL) 609 return -1; 610 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin); 611 wpa_config_set(ssid, "phase1", val, 0); 612 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout, 613 wpa_s, NULL); 614 wpas_wps_reassoc(wpa_s, ssid); 615 return 0; 616 } 617 618 619 static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk, 620 size_t psk_len) 621 { 622 wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for " 623 "STA " MACSTR, MAC2STR(mac_addr)); 624 wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len); 625 626 /* TODO */ 627 628 return 0; 629 } 630 631 632 static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e, 633 const struct wps_device_data *dev) 634 { 635 char uuid[40], txt[400]; 636 int len; 637 if (uuid_bin2str(uuid_e, uuid, sizeof(uuid))) 638 return; 639 wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid); 640 len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR 641 " [%s|%s|%s|%s|%s|%d-%08X-%d]", 642 uuid, MAC2STR(dev->mac_addr), dev->device_name, 643 dev->manufacturer, dev->model_name, 644 dev->model_number, dev->serial_number, 645 dev->categ, dev->oui, dev->sub_categ); 646 if (len > 0 && len < (int) sizeof(txt)) 647 wpa_printf(MSG_INFO, "%s", txt); 648 } 649 650 651 int wpas_wps_init(struct wpa_supplicant *wpa_s) 652 { 653 struct wps_context *wps; 654 struct wps_registrar_config rcfg; 655 656 wps = os_zalloc(sizeof(*wps)); 657 if (wps == NULL) 658 return -1; 659 660 wps->cred_cb = wpa_supplicant_wps_cred; 661 wps->event_cb = wpa_supplicant_wps_event; 662 wps->cb_ctx = wpa_s; 663 664 wps->dev.device_name = wpa_s->conf->device_name; 665 wps->dev.manufacturer = wpa_s->conf->manufacturer; 666 wps->dev.model_name = wpa_s->conf->model_name; 667 wps->dev.model_number = wpa_s->conf->model_number; 668 wps->dev.serial_number = wpa_s->conf->serial_number; 669 if (wpa_s->conf->device_type) { 670 char *pos; 671 u8 oui[4]; 672 /* <categ>-<OUI>-<subcateg> */ 673 wps->dev.categ = atoi(wpa_s->conf->device_type); 674 pos = os_strchr(wpa_s->conf->device_type, '-'); 675 if (pos == NULL) { 676 wpa_printf(MSG_ERROR, "WPS: Invalid device_type"); 677 os_free(wps); 678 return -1; 679 } 680 pos++; 681 if (hexstr2bin(pos, oui, 4)) { 682 wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI"); 683 os_free(wps); 684 return -1; 685 } 686 wps->dev.oui = WPA_GET_BE32(oui); 687 pos = os_strchr(pos, '-'); 688 if (pos == NULL) { 689 wpa_printf(MSG_ERROR, "WPS: Invalid device_type"); 690 os_free(wps); 691 return -1; 692 } 693 pos++; 694 wps->dev.sub_categ = atoi(pos); 695 } 696 wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version); 697 wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */ 698 os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN); 699 if (is_nil_uuid(wpa_s->conf->uuid)) { 700 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid); 701 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address", 702 wps->uuid, WPS_UUID_LEN); 703 } else 704 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN); 705 706 wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK; 707 wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP; 708 709 os_memset(&rcfg, 0, sizeof(rcfg)); 710 rcfg.new_psk_cb = wpas_wps_new_psk_cb; 711 rcfg.pin_needed_cb = wpas_wps_pin_needed_cb; 712 rcfg.cb_ctx = wpa_s; 713 714 wps->registrar = wps_registrar_init(wps, &rcfg); 715 if (wps->registrar == NULL) { 716 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar"); 717 os_free(wps); 718 return -1; 719 } 720 721 wpa_s->wps = wps; 722 723 return 0; 724 } 725 726 727 void wpas_wps_deinit(struct wpa_supplicant *wpa_s) 728 { 729 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL); 730 731 if (wpa_s->wps == NULL) 732 return; 733 734 wps_registrar_deinit(wpa_s->wps->registrar); 735 os_free(wpa_s->wps->network_key); 736 os_free(wpa_s->wps); 737 wpa_s->wps = NULL; 738 } 739 740 741 int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s, 742 struct wpa_ssid *ssid, struct wpa_scan_res *bss) 743 { 744 struct wpabuf *wps_ie; 745 746 if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) 747 return -1; 748 749 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 750 if (eap_is_wps_pbc_enrollee(&ssid->eap)) { 751 if (!wps_ie) { 752 wpa_printf(MSG_DEBUG, " skip - non-WPS AP"); 753 return 0; 754 } 755 756 if (!wps_is_selected_pbc_registrar(wps_ie)) { 757 wpa_printf(MSG_DEBUG, " skip - WPS AP " 758 "without active PBC Registrar"); 759 wpabuf_free(wps_ie); 760 return 0; 761 } 762 763 /* TODO: overlap detection */ 764 wpa_printf(MSG_DEBUG, " selected based on WPS IE " 765 "(Active PBC)"); 766 wpabuf_free(wps_ie); 767 return 1; 768 } 769 770 if (eap_is_wps_pin_enrollee(&ssid->eap)) { 771 if (!wps_ie) { 772 wpa_printf(MSG_DEBUG, " skip - non-WPS AP"); 773 return 0; 774 } 775 776 /* 777 * Start with WPS APs that advertise active PIN Registrar and 778 * allow any WPS AP after third scan since some APs do not set 779 * Selected Registrar attribute properly when using external 780 * Registrar. 781 */ 782 if (!wps_is_selected_pin_registrar(wps_ie)) { 783 if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) { 784 wpa_printf(MSG_DEBUG, " skip - WPS AP " 785 "without active PIN Registrar"); 786 wpabuf_free(wps_ie); 787 return 0; 788 } 789 wpa_printf(MSG_DEBUG, " selected based on WPS IE"); 790 } else { 791 wpa_printf(MSG_DEBUG, " selected based on WPS IE " 792 "(Active PIN)"); 793 } 794 wpabuf_free(wps_ie); 795 return 1; 796 } 797 798 if (wps_ie) { 799 wpa_printf(MSG_DEBUG, " selected based on WPS IE"); 800 wpabuf_free(wps_ie); 801 return 1; 802 } 803 804 return -1; 805 } 806 807 808 int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s, 809 struct wpa_ssid *ssid, 810 struct wpa_scan_res *bss) 811 { 812 struct wpabuf *wps_ie = NULL; 813 int ret = 0; 814 815 if (eap_is_wps_pbc_enrollee(&ssid->eap)) { 816 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 817 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) { 818 /* allow wildcard SSID for WPS PBC */ 819 ret = 1; 820 } 821 } else if (eap_is_wps_pin_enrollee(&ssid->eap)) { 822 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 823 if (wps_ie && 824 (wps_is_selected_pin_registrar(wps_ie) || 825 wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) { 826 /* allow wildcard SSID for WPS PIN */ 827 ret = 1; 828 } 829 } 830 831 if (!ret && ssid->bssid_set && 832 os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) { 833 /* allow wildcard SSID due to hardcoded BSSID match */ 834 ret = 1; 835 } 836 837 wpabuf_free(wps_ie); 838 839 return ret; 840 } 841 842 843 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s, 844 struct wpa_scan_res *selected, 845 struct wpa_ssid *ssid) 846 { 847 const u8 *sel_uuid, *uuid; 848 size_t i; 849 struct wpabuf *wps_ie; 850 int ret = 0; 851 852 if (!eap_is_wps_pbc_enrollee(&ssid->eap)) 853 return 0; 854 855 /* Make sure that only one AP is in active PBC mode */ 856 wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE); 857 if (wps_ie) 858 sel_uuid = wps_get_uuid_e(wps_ie); 859 else 860 sel_uuid = NULL; 861 862 for (i = 0; i < wpa_s->scan_res->num; i++) { 863 struct wpa_scan_res *bss = wpa_s->scan_res->res[i]; 864 struct wpabuf *ie; 865 if (bss == selected) 866 continue; 867 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 868 if (!ie) 869 continue; 870 if (!wps_is_selected_pbc_registrar(ie)) { 871 wpabuf_free(ie); 872 continue; 873 } 874 uuid = wps_get_uuid_e(ie); 875 if (sel_uuid == NULL || uuid == NULL || 876 os_memcmp(sel_uuid, uuid, 16) != 0) { 877 ret = 1; /* PBC overlap */ 878 wpabuf_free(ie); 879 break; 880 } 881 882 /* TODO: verify that this is reasonable dual-band situation */ 883 884 wpabuf_free(ie); 885 } 886 887 wpabuf_free(wps_ie); 888 889 return ret; 890 } 891 892 893 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s) 894 { 895 size_t i; 896 897 if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED) 898 return; 899 900 for (i = 0; i < wpa_s->scan_res->num; i++) { 901 struct wpa_scan_res *bss = wpa_s->scan_res->res[i]; 902 struct wpabuf *ie; 903 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE); 904 if (!ie) 905 continue; 906 if (wps_is_selected_pbc_registrar(ie)) 907 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC); 908 else if (wps_is_selected_pin_registrar(ie)) 909 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN); 910 else 911 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE); 912 wpabuf_free(ie); 913 break; 914 } 915 } 916 917 918 int wpas_wps_searching(struct wpa_supplicant *wpa_s) 919 { 920 struct wpa_ssid *ssid; 921 922 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 923 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled) 924 return 1; 925 } 926 927 return 0; 928 } 929
