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 "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
wpas_wps_eapol_cb(struct wpa_supplicant * wpa_s)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
wpas_wps_security_workaround(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,const struct wps_credential * cred)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
wpa_supplicant_wps_cred(void * ctx,const struct wps_credential * cred)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
wpa_supplicant_wps_event_m2d(struct wpa_supplicant * wpa_s,struct wps_event_m2d * m2d)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
wpa_supplicant_wps_event_fail(struct wpa_supplicant * wpa_s,struct wps_event_fail * fail)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
wpa_supplicant_wps_event_success(struct wpa_supplicant * wpa_s)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
wpa_supplicant_wps_event(void * ctx,enum wps_event event,union wps_event_data * data)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
wpas_wps_get_req_type(struct wpa_ssid * ssid)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
wpas_clear_wps(struct wpa_supplicant * wpa_s)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
wpas_wps_timeout(void * eloop_ctx,void * timeout_ctx)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
wpas_wps_add_network(struct wpa_supplicant * wpa_s,int registrar,const u8 * bssid)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
wpas_wps_reassoc(struct wpa_supplicant * wpa_s,struct wpa_ssid * selected)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
wpas_wps_start_pbc(struct wpa_supplicant * wpa_s,const u8 * bssid)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
wpas_wps_start_pin(struct wpa_supplicant * wpa_s,const u8 * bssid,const char * pin)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
wpas_wps_start_reg(struct wpa_supplicant * wpa_s,const u8 * bssid,const char * pin)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
wpas_wps_new_psk_cb(void * ctx,const u8 * mac_addr,const u8 * psk,size_t psk_len)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
wpas_wps_pin_needed_cb(void * ctx,const u8 * uuid_e,const struct wps_device_data * dev)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
wpas_wps_init(struct wpa_supplicant * wpa_s)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
wpas_wps_deinit(struct wpa_supplicant * wpa_s)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
wpas_wps_ssid_bss_match(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,struct wpa_scan_res * bss)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
wpas_wps_ssid_wildcard_ok(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,struct wpa_scan_res * bss)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
wpas_wps_scan_pbc_overlap(struct wpa_supplicant * wpa_s,struct wpa_scan_res * selected,struct wpa_ssid * ssid)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
wpas_wps_notify_scan_results(struct wpa_supplicant * wpa_s)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
wpas_wps_searching(struct wpa_supplicant * wpa_s)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