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Jouni Malinenfa201b62008-11-28 19:46:22 +02001/*
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"
Jouni Malinenb01c18a2008-11-29 13:38:03 +020021#include "eap_peer/eap.h"
Jouni Malinenfa201b62008-11-28 19:46:22 +020022#include "wpa_supplicant_i.h"
Jouni Malinen2d5b7922009-03-26 20:37:05 +020023#include "driver_i.h"
Jouni Malinenfcc60db2008-11-29 20:59:45 +020024#include "eloop.h"
Jouni Malinen79da74a2009-01-01 22:56:52 +020025#include "uuid.h"
Jouni Malinena524f052008-12-15 20:09:57 +020026#include "wpa_ctrl.h"
Jouni Malinen47662162009-01-18 12:27:12 +020027#include "ctrl_iface_dbus.h"
Jouni Malinenfcc60db2008-11-29 20:59:45 +020028#include "eap_common/eap_wsc_common.h"
Jouni Malinena6099152009-01-23 13:10:58 +020029#include "blacklist.h"
Jouni Malinen7cc1b6c2009-03-05 21:39:39 +020030#include "wpa.h"
Jouni Malinenfa201b62008-11-28 19:46:22 +020031#include "wps_supplicant.h"
Masashi Honma46bdb832009-02-26 21:57:38 +020032#include "dh_groups.h"
Jouni Malinenfa201b62008-11-28 19:46:22 +020033
Jouni Malinena6099152009-01-23 13:10:58 +020034#define WPS_PIN_SCAN_IGNORE_SEL_REG 3
Jouni Malinenfa201b62008-11-28 19:46:22 +020035
Jouni Malinenfcc60db2008-11-29 20:59:45 +020036static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
Jouni Malinen469fc3a2008-12-19 22:19:41 +020037static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
Jouni Malinenfcc60db2008-11-29 20:59:45 +020038
39
Jouni Malinenfa201b62008-11-28 19:46:22 +020040int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
41{
Jouni Malinena6099152009-01-23 13:10:58 +020042 if (!wpa_s->wps_success &&
43 wpa_s->current_ssid &&
44 eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
45 const u8 *bssid = wpa_s->bssid;
46 if (is_zero_ether_addr(bssid))
47 bssid = wpa_s->pending_bssid;
48
49 wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
50 " did not succeed - continue trying to find "
51 "suitable AP", MAC2STR(bssid));
52 wpa_blacklist_add(wpa_s, bssid);
53
54 wpa_supplicant_deauthenticate(wpa_s,
55 WLAN_REASON_DEAUTH_LEAVING);
56 wpa_s->reassociate = 1;
57 wpa_supplicant_req_scan(wpa_s,
58 wpa_s->blacklist_cleared ? 5 : 0, 0);
59 wpa_s->blacklist_cleared = 0;
60 return 1;
61 }
62
Jouni Malinenfcc60db2008-11-29 20:59:45 +020063 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
64
Jouni Malinenfa201b62008-11-28 19:46:22 +020065 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
66 !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
67 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
68 "try to associate with the received credential");
69 wpa_supplicant_deauthenticate(wpa_s,
70 WLAN_REASON_DEAUTH_LEAVING);
71 wpa_s->reassociate = 1;
72 wpa_supplicant_req_scan(wpa_s, 0, 0);
73 return 1;
74 }
75
Jouni Malinen47662162009-01-18 12:27:12 +020076 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
77 wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
78 "for external credential processing");
79 wpas_clear_wps(wpa_s);
80 wpa_supplicant_deauthenticate(wpa_s,
81 WLAN_REASON_DEAUTH_LEAVING);
82 return 1;
83 }
84
Jouni Malinenfa201b62008-11-28 19:46:22 +020085 return 0;
86}
87
88
Jouni Malinen7cc1b6c2009-03-05 21:39:39 +020089static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
90 struct wpa_ssid *ssid,
91 const struct wps_credential *cred)
92{
93 struct wpa_driver_capa capa;
94 size_t i;
95 struct wpa_scan_res *bss;
96 const u8 *ie;
97 struct wpa_ie_data adv;
98 int wpa2 = 0, ccmp = 0;
99
100 /*
101 * Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
102 * case they are configured for mixed mode operation (WPA+WPA2 and
103 * TKIP+CCMP). Try to use scan results to figure out whether the AP
104 * actually supports stronger security and select that if the client
105 * has support for it, too.
106 */
107
108 if (wpa_drv_get_capa(wpa_s, &capa))
109 return; /* Unknown what driver supports */
110
111 if (wpa_supplicant_get_scan_results(wpa_s) || wpa_s->scan_res == NULL)
112 return; /* Could not get scan results for checking advertised
113 * parameters */
114
115 for (i = 0; i < wpa_s->scan_res->num; i++) {
116 bss = wpa_s->scan_res->res[i];
117 if (os_memcmp(bss->bssid, cred->mac_addr, ETH_ALEN) != 0)
118 continue;
119 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
120 if (ie == NULL)
121 continue;
122 if (ie[1] != ssid->ssid_len || ssid->ssid == NULL ||
123 os_memcmp(ie + 2, ssid->ssid, ssid->ssid_len) != 0)
124 continue;
125
126 wpa_printf(MSG_DEBUG, "WPS: AP found from scan results");
127 break;
128 }
129
130 if (i == wpa_s->scan_res->num) {
131 wpa_printf(MSG_DEBUG, "WPS: The AP was not found from scan "
132 "results - use credential as-is");
133 return;
134 }
135
136 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
137 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
138 wpa2 = 1;
139 if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
140 ccmp = 1;
141 } else {
142 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
143 if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
144 adv.pairwise_cipher & WPA_CIPHER_CCMP)
145 ccmp = 1;
146 }
147
148 if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
149 (ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
150 /*
151 * TODO: This could be the initial AP configuration and the
152 * Beacon contents could change shortly. Should request a new
153 * scan and delay addition of the network until the updated
154 * scan results are available.
155 */
156 wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
157 "support - use credential as-is");
158 return;
159 }
160
161 if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
162 (ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
163 (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
164 wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
165 "based on scan results");
166 if (wpa_s->conf->ap_scan == 1)
167 ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
168 else
169 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
170 }
171
172 if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
173 (ssid->proto & WPA_PROTO_WPA) &&
174 (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
175 wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
176 "based on scan results");
177 if (wpa_s->conf->ap_scan == 1)
178 ssid->proto |= WPA_PROTO_RSN;
179 else
180 ssid->proto = WPA_PROTO_RSN;
181 }
182}
183
184
Jouni Malinenbcbbc7a2008-11-28 20:02:32 +0200185static int wpa_supplicant_wps_cred(void *ctx,
186 const struct wps_credential *cred)
Jouni Malinenfa201b62008-11-28 19:46:22 +0200187{
188 struct wpa_supplicant *wpa_s = ctx;
189 struct wpa_ssid *ssid = wpa_s->current_ssid;
Andriy Tkachuk522b5b62009-02-18 19:58:44 +0200190 u8 key_idx = 0;
Jouni Malinenfa201b62008-11-28 19:46:22 +0200191
Jouni Malinen47662162009-01-18 12:27:12 +0200192 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);
Jouni Malinenfa201b62008-11-28 19:46:22 +0200206
Jouni Malineneca6e0a2009-01-17 22:17:12 +0200207 wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
208 cred->cred_attr, cred->cred_attr_len);
209
Jouni Malinen47662162009-01-18 12:27:12 +0200210 if (wpa_s->conf->wps_cred_processing == 1)
211 return 0;
212
Jouni Malinenf2860772009-01-17 21:45:51 +0200213 if (cred->auth_type != WPS_AUTH_OPEN &&
214 cred->auth_type != WPS_AUTH_SHARED &&
215 cred->auth_type != WPS_AUTH_WPAPSK &&
216 cred->auth_type != WPS_AUTH_WPA2PSK) {
217 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
218 "unsupported authentication type %d",
219 cred->auth_type);
220 return 0;
221 }
222
Jouni Malinenfa201b62008-11-28 19:46:22 +0200223 if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
224 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
225 "on the received credential");
226 os_free(ssid->eap.identity);
227 ssid->eap.identity = NULL;
228 ssid->eap.identity_len = 0;
229 os_free(ssid->eap.phase1);
230 ssid->eap.phase1 = NULL;
231 os_free(ssid->eap.eap_methods);
232 ssid->eap.eap_methods = NULL;
233 } else {
234 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
235 "received credential");
236 ssid = wpa_config_add_network(wpa_s->conf);
237 if (ssid == NULL)
238 return -1;
239 }
240
241 wpa_config_set_network_defaults(ssid);
242
243 os_free(ssid->ssid);
244 ssid->ssid = os_malloc(cred->ssid_len);
245 if (ssid->ssid) {
246 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
247 ssid->ssid_len = cred->ssid_len;
248 }
249
250 switch (cred->encr_type) {
251 case WPS_ENCR_NONE:
Jouni Malinenfa201b62008-11-28 19:46:22 +0200252 break;
253 case WPS_ENCR_WEP:
Andriy Tkachuk4b195a12009-02-17 10:30:43 +0200254 if (cred->key_len <= 0)
255 break;
256 if (cred->key_len != 5 && cred->key_len != 13 &&
257 cred->key_len != 10 && cred->key_len != 26) {
258 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
259 "%lu", (unsigned long) cred->key_len);
260 return -1;
Jouni Malinenfa201b62008-11-28 19:46:22 +0200261 }
Andriy Tkachuk522b5b62009-02-18 19:58:44 +0200262 if (cred->key_idx > NUM_WEP_KEYS) {
Andriy Tkachuk4b195a12009-02-17 10:30:43 +0200263 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
264 cred->key_idx);
265 return -1;
266 }
Andriy Tkachuk522b5b62009-02-18 19:58:44 +0200267 if (cred->key_idx)
268 key_idx = cred->key_idx - 1;
Andriy Tkachuk4b195a12009-02-17 10:30:43 +0200269 if (cred->key_len == 10 || cred->key_len == 26) {
270 if (hexstr2bin((char *) cred->key,
271 ssid->wep_key[key_idx],
272 cred->key_len / 2) < 0) {
273 wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
274 "%d", key_idx);
275 return -1;
276 }
277 ssid->wep_key_len[key_idx] = cred->key_len / 2;
278 } else {
279 os_memcpy(ssid->wep_key[key_idx], cred->key,
280 cred->key_len);
281 ssid->wep_key_len[key_idx] = cred->key_len;
282 }
283 ssid->wep_tx_keyidx = key_idx;
Jouni Malinenfa201b62008-11-28 19:46:22 +0200284 break;
285 case WPS_ENCR_TKIP:
286 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
Jouni Malinenfa201b62008-11-28 19:46:22 +0200287 break;
288 case WPS_ENCR_AES:
289 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
Jouni Malinenfa201b62008-11-28 19:46:22 +0200290 break;
291 }
292
293 switch (cred->auth_type) {
294 case WPS_AUTH_OPEN:
295 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
296 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
297 ssid->proto = 0;
298 break;
299 case WPS_AUTH_SHARED:
300 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
301 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
302 ssid->proto = 0;
303 break;
304 case WPS_AUTH_WPAPSK:
305 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
306 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
307 ssid->proto = WPA_PROTO_WPA;
308 break;
309 case WPS_AUTH_WPA:
310 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
311 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
312 ssid->proto = WPA_PROTO_WPA;
313 break;
314 case WPS_AUTH_WPA2:
315 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
316 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
317 ssid->proto = WPA_PROTO_RSN;
318 break;
319 case WPS_AUTH_WPA2PSK:
320 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
321 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
322 ssid->proto = WPA_PROTO_RSN;
323 break;
324 }
325
326 if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
327 if (cred->key_len == 2 * PMK_LEN) {
328 if (hexstr2bin((const char *) cred->key, ssid->psk,
329 PMK_LEN)) {
330 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
331 "Key");
332 return -1;
333 }
334 ssid->psk_set = 1;
335 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
336 os_free(ssid->passphrase);
337 ssid->passphrase = os_malloc(cred->key_len + 1);
338 if (ssid->passphrase == NULL)
339 return -1;
340 os_memcpy(ssid->passphrase, cred->key, cred->key_len);
341 ssid->passphrase[cred->key_len] = '\0';
342 wpa_config_update_psk(ssid);
343 } else {
344 wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
345 "length %lu",
346 (unsigned long) cred->key_len);
347 return -1;
348 }
349 }
350
Jouni Malinen7cc1b6c2009-03-05 21:39:39 +0200351 wpas_wps_security_workaround(wpa_s, ssid, cred);
352
Jouni Malinenfa201b62008-11-28 19:46:22 +0200353#ifndef CONFIG_NO_CONFIG_WRITE
354 if (wpa_s->conf->update_config &&
355 wpa_config_write(wpa_s->confname, wpa_s->conf)) {
356 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
357 return -1;
358 }
359#endif /* CONFIG_NO_CONFIG_WRITE */
360
361 return 0;
362}
363
364
Jouni Malinen4b682902008-12-18 21:58:42 +0200365static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
366 struct wps_event_m2d *m2d)
367{
368 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
369 "dev_password_id=%d config_error=%d",
370 m2d->dev_password_id, m2d->config_error);
371}
372
373
Jouni Malinen469fc3a2008-12-19 22:19:41 +0200374static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
375 struct wps_event_fail *fail)
376{
377 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
378 wpas_clear_wps(wpa_s);
379}
380
381
Jouni Malinenad5302a2008-12-19 22:34:18 +0200382static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
383{
384 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
Jouni Malinena6099152009-01-23 13:10:58 +0200385 wpa_s->wps_success = 1;
Jouni Malinenad5302a2008-12-19 22:34:18 +0200386}
387
388
Jouni Malinen4b682902008-12-18 21:58:42 +0200389static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
390 union wps_event_data *data)
391{
392 struct wpa_supplicant *wpa_s = ctx;
393 switch (event) {
394 case WPS_EV_M2D:
395 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
396 break;
Jouni Malinen469fc3a2008-12-19 22:19:41 +0200397 case WPS_EV_FAIL:
398 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
399 break;
Jouni Malinenad5302a2008-12-19 22:34:18 +0200400 case WPS_EV_SUCCESS:
401 wpa_supplicant_wps_event_success(wpa_s);
402 break;
Jouni Malinen3b2cf802009-01-23 21:57:43 +0200403 case WPS_EV_PWD_AUTH_FAIL:
404 break;
Jouni Malinen4b682902008-12-18 21:58:42 +0200405 }
406}
407
408
Jouni Malinenf90c86d2009-01-03 19:50:49 +0200409enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
Jouni Malinenfa201b62008-11-28 19:46:22 +0200410{
Jouni Malinenb01c18a2008-11-29 13:38:03 +0200411 if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
412 eap_is_wps_pin_enrollee(&ssid->eap))
413 return WPS_REQ_ENROLLEE;
414 else
415 return WPS_REQ_REGISTRAR;
Jouni Malinenfa201b62008-11-28 19:46:22 +0200416}
Jouni Malinen116654c2008-11-28 20:32:13 +0200417
418
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200419static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
420{
421 int id;
422 struct wpa_ssid *ssid;
423
424 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
425
426 /* Remove any existing WPS network from configuration */
427 ssid = wpa_s->conf->ssid;
428 while (ssid) {
Jouni Malinenf0477202008-12-18 01:06:06 +0200429 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
430 if (ssid == wpa_s->current_ssid)
431 wpa_s->current_ssid = NULL;
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200432 id = ssid->id;
Jouni Malinenf0477202008-12-18 01:06:06 +0200433 } else
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200434 id = -1;
435 ssid = ssid->next;
436 if (id >= 0)
437 wpa_config_remove_network(wpa_s->conf, id);
438 }
439}
440
441
442static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
443{
444 struct wpa_supplicant *wpa_s = eloop_ctx;
Jouni Malinena6099152009-01-23 13:10:58 +0200445 wpa_printf(MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
446 "out");
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200447 wpas_clear_wps(wpa_s);
448}
449
450
451static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
452 int registrar, const u8 *bssid)
453{
454 struct wpa_ssid *ssid;
455
456 ssid = wpa_config_add_network(wpa_s->conf);
457 if (ssid == NULL)
458 return NULL;
459 wpa_config_set_network_defaults(ssid);
460 if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
461 wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
462 wpa_config_set(ssid, "identity", registrar ?
463 "\"" WSC_ID_REGISTRAR "\"" :
464 "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
465 wpa_config_remove_network(wpa_s->conf, ssid->id);
466 return NULL;
467 }
468
469 if (bssid) {
470 size_t i;
471 struct wpa_scan_res *res;
472
473 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
Jouni Malinen24c23d12008-12-20 22:55:02 +0200474 ssid->bssid_set = 1;
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200475
476 /* Try to get SSID from scan results */
477 if (wpa_s->scan_res == NULL &&
478 wpa_supplicant_get_scan_results(wpa_s) < 0)
479 return ssid; /* Could not find any scan results */
480
481 for (i = 0; i < wpa_s->scan_res->num; i++) {
482 const u8 *ie;
483
484 res = wpa_s->scan_res->res[i];
485 if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
486 continue;
487
488 ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
489 if (ie == NULL)
490 break;
491 os_free(ssid->ssid);
492 ssid->ssid = os_malloc(ie[1]);
493 if (ssid->ssid == NULL)
494 break;
495 os_memcpy(ssid->ssid, ie + 2, ie[1]);
496 ssid->ssid_len = ie[1];
497 break;
498 }
499 }
500
501 return ssid;
502}
503
504
505static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
506 struct wpa_ssid *selected)
507{
508 struct wpa_ssid *ssid;
509
510 /* Mark all other networks disabled and trigger reassociation */
511 ssid = wpa_s->conf->ssid;
512 while (ssid) {
513 ssid->disabled = ssid != selected;
514 ssid = ssid->next;
515 }
516 wpa_s->disconnected = 0;
517 wpa_s->reassociate = 1;
Jouni Malinena6099152009-01-23 13:10:58 +0200518 wpa_s->scan_runs = 0;
519 wpa_s->wps_success = 0;
520 wpa_s->blacklist_cleared = 0;
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200521 wpa_supplicant_req_scan(wpa_s, 0, 0);
522}
523
524
525int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
526{
527 struct wpa_ssid *ssid;
528 wpas_clear_wps(wpa_s);
529 ssid = wpas_wps_add_network(wpa_s, 0, bssid);
530 if (ssid == NULL)
531 return -1;
532 wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
533 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
534 wpa_s, NULL);
535 wpas_wps_reassoc(wpa_s, ssid);
536 return 0;
537}
538
539
540int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
541 const char *pin)
542{
543 struct wpa_ssid *ssid;
Masashi Honma46bdb832009-02-26 21:57:38 +0200544 char val[128];
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200545 unsigned int rpin = 0;
546
547 wpas_clear_wps(wpa_s);
548 ssid = wpas_wps_add_network(wpa_s, 0, bssid);
549 if (ssid == NULL)
550 return -1;
551 if (pin)
552 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
553 else {
554 rpin = wps_generate_pin();
555 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
556 }
557 wpa_config_set(ssid, "phase1", val, 0);
558 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
559 wpa_s, NULL);
560 wpas_wps_reassoc(wpa_s, ssid);
561 return rpin;
562}
563
564
Jouni Malinen116f7bb2009-02-26 22:10:21 +0200565#ifdef CONFIG_WPS_OOB
Masashi Honma46bdb832009-02-26 21:57:38 +0200566int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
Masashi Honmae1ee6b62009-03-06 16:16:22 +0200567 char *path, char *method, char *name)
Masashi Honma46bdb832009-02-26 21:57:38 +0200568{
569 struct wps_context *wps = wpa_s->wps;
Jouni Malinen7cbf51b2009-02-26 22:07:55 +0200570 struct oob_device_data *oob_dev;
Masashi Honma46bdb832009-02-26 21:57:38 +0200571
Jouni Malinen7cbf51b2009-02-26 22:07:55 +0200572 oob_dev = wps_get_oob_device(device_type);
573 if (oob_dev == NULL)
Masashi Honma46bdb832009-02-26 21:57:38 +0200574 return -1;
Jouni Malinen7cbf51b2009-02-26 22:07:55 +0200575 oob_dev->device_path = path;
Masashi Honmae1ee6b62009-03-06 16:16:22 +0200576 oob_dev->device_name = name;
Masashi Honma46bdb832009-02-26 21:57:38 +0200577 wps->oob_conf.oob_method = wps_get_oob_method(method);
578
Jouni Malinend5e2b2d2009-02-26 22:09:35 +0200579 if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
580 /*
581 * Use pre-configured DH keys in order to be able to write the
582 * key hash into the OOB file.
583 */
584 wpabuf_free(wps->dh_pubkey);
585 wpabuf_free(wps->dh_privkey);
586 wps->dh_privkey = NULL;
587 wps->dh_pubkey = dh_init(dh_groups_get(WPS_DH_GROUP),
588 &wps->dh_privkey);
589 wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
590 if (wps->dh_pubkey == NULL) {
591 wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
592 "Diffie-Hellman handshake");
593 return -1;
594 }
595 }
596
Masashi Honma46bdb832009-02-26 21:57:38 +0200597 if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
598 wpas_clear_wps(wpa_s);
599
Jouni Malinen7cbf51b2009-02-26 22:07:55 +0200600 if (wps_process_oob(wps, oob_dev, 0) < 0)
Masashi Honma46bdb832009-02-26 21:57:38 +0200601 return -1;
602
603 if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
604 wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
605 wpas_wps_start_pin(wpa_s, NULL,
606 wpabuf_head(wps->oob_conf.dev_password)) < 0)
607 return -1;
608
609 return 0;
610}
Jouni Malinen116f7bb2009-02-26 22:10:21 +0200611#endif /* CONFIG_WPS_OOB */
Masashi Honma46bdb832009-02-26 21:57:38 +0200612
613
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200614int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
615 const char *pin)
616{
617 struct wpa_ssid *ssid;
618 char val[30];
619
620 if (!pin)
621 return -1;
622 wpas_clear_wps(wpa_s);
623 ssid = wpas_wps_add_network(wpa_s, 1, bssid);
624 if (ssid == NULL)
625 return -1;
626 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
627 wpa_config_set(ssid, "phase1", val, 0);
628 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
629 wpa_s, NULL);
630 wpas_wps_reassoc(wpa_s, ssid);
631 return 0;
632}
633
634
Jouni Malinenc5adf522009-01-03 20:18:35 +0200635static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
636 size_t psk_len)
637{
638 wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
639 "STA " MACSTR, MAC2STR(mac_addr));
640 wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
641
642 /* TODO */
643
644 return 0;
645}
646
647
648static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
649 const struct wps_device_data *dev)
650{
651 char uuid[40], txt[400];
652 int len;
653 if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
654 return;
655 wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
656 len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
657 " [%s|%s|%s|%s|%s|%d-%08X-%d]",
658 uuid, MAC2STR(dev->mac_addr), dev->device_name,
659 dev->manufacturer, dev->model_name,
660 dev->model_number, dev->serial_number,
661 dev->categ, dev->oui, dev->sub_categ);
662 if (len > 0 && len < (int) sizeof(txt))
663 wpa_printf(MSG_INFO, "%s", txt);
664}
665
666
Jouni Malinen116654c2008-11-28 20:32:13 +0200667int wpas_wps_init(struct wpa_supplicant *wpa_s)
668{
669 struct wps_context *wps;
Jouni Malinenc5adf522009-01-03 20:18:35 +0200670 struct wps_registrar_config rcfg;
Jouni Malinen116654c2008-11-28 20:32:13 +0200671
672 wps = os_zalloc(sizeof(*wps));
673 if (wps == NULL)
674 return -1;
675
676 wps->cred_cb = wpa_supplicant_wps_cred;
Jouni Malinen4b682902008-12-18 21:58:42 +0200677 wps->event_cb = wpa_supplicant_wps_event;
Jouni Malinen116654c2008-11-28 20:32:13 +0200678 wps->cb_ctx = wpa_s;
679
Jouni Malinen3c0b7aa2008-12-13 17:20:46 +0200680 wps->dev.device_name = wpa_s->conf->device_name;
681 wps->dev.manufacturer = wpa_s->conf->manufacturer;
682 wps->dev.model_name = wpa_s->conf->model_name;
683 wps->dev.model_number = wpa_s->conf->model_number;
684 wps->dev.serial_number = wpa_s->conf->serial_number;
685 if (wpa_s->conf->device_type) {
686 char *pos;
687 u8 oui[4];
688 /* <categ>-<OUI>-<subcateg> */
689 wps->dev.categ = atoi(wpa_s->conf->device_type);
690 pos = os_strchr(wpa_s->conf->device_type, '-');
691 if (pos == NULL) {
692 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
693 os_free(wps);
694 return -1;
695 }
696 pos++;
697 if (hexstr2bin(pos, oui, 4)) {
698 wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
699 os_free(wps);
700 return -1;
701 }
702 wps->dev.oui = WPA_GET_BE32(oui);
703 pos = os_strchr(pos, '-');
704 if (pos == NULL) {
705 wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
706 os_free(wps);
707 return -1;
708 }
709 pos++;
710 wps->dev.sub_categ = atoi(pos);
711 }
712 wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
713 wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
Jouni Malinen398cfbf2008-11-28 20:44:47 +0200714 os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
Jouni Malinen79da74a2009-01-01 22:56:52 +0200715 if (is_nil_uuid(wpa_s->conf->uuid)) {
716 uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
717 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
718 wps->uuid, WPS_UUID_LEN);
719 } else
720 os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
Jouni Malinen116654c2008-11-28 20:32:13 +0200721
Jouni Malinenc5adf522009-01-03 20:18:35 +0200722 wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
723 wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
724
725 os_memset(&rcfg, 0, sizeof(rcfg));
726 rcfg.new_psk_cb = wpas_wps_new_psk_cb;
727 rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
728 rcfg.cb_ctx = wpa_s;
729
730 wps->registrar = wps_registrar_init(wps, &rcfg);
731 if (wps->registrar == NULL) {
732 wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
733 os_free(wps);
734 return -1;
735 }
736
Jouni Malinen116654c2008-11-28 20:32:13 +0200737 wpa_s->wps = wps;
738
739 return 0;
740}
741
742
743void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
744{
Jouni Malinenfcc60db2008-11-29 20:59:45 +0200745 eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
746
Jouni Malinen116654c2008-11-28 20:32:13 +0200747 if (wpa_s->wps == NULL)
748 return;
749
Jouni Malinenc5adf522009-01-03 20:18:35 +0200750 wps_registrar_deinit(wpa_s->wps->registrar);
Masashi Honma46bdb832009-02-26 21:57:38 +0200751 wpabuf_free(wpa_s->wps->dh_pubkey);
752 wpabuf_free(wpa_s->wps->dh_privkey);
753 wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
754 wpabuf_free(wpa_s->wps->oob_conf.dev_password);
Jouni Malinen116654c2008-11-28 20:32:13 +0200755 os_free(wpa_s->wps->network_key);
756 os_free(wpa_s->wps);
757 wpa_s->wps = NULL;
758}
Jouni Malinen351f09a2008-11-29 22:06:34 +0200759
760
Jouni Malinena6099152009-01-23 13:10:58 +0200761int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
762 struct wpa_ssid *ssid, struct wpa_scan_res *bss)
Jouni Malinen351f09a2008-11-29 22:06:34 +0200763{
764 struct wpabuf *wps_ie;
765
766 if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
767 return -1;
768
769 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
770 if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
771 if (!wps_ie) {
772 wpa_printf(MSG_DEBUG, " skip - non-WPS AP");
773 return 0;
774 }
775
776 if (!wps_is_selected_pbc_registrar(wps_ie)) {
777 wpa_printf(MSG_DEBUG, " skip - WPS AP "
778 "without active PBC Registrar");
779 wpabuf_free(wps_ie);
780 return 0;
781 }
782
783 /* TODO: overlap detection */
784 wpa_printf(MSG_DEBUG, " selected based on WPS IE "
785 "(Active PBC)");
786 wpabuf_free(wps_ie);
787 return 1;
788 }
789
790 if (eap_is_wps_pin_enrollee(&ssid->eap)) {
791 if (!wps_ie) {
792 wpa_printf(MSG_DEBUG, " skip - non-WPS AP");
793 return 0;
794 }
795
Jouni Malinena6099152009-01-23 13:10:58 +0200796 /*
797 * Start with WPS APs that advertise active PIN Registrar and
798 * allow any WPS AP after third scan since some APs do not set
799 * Selected Registrar attribute properly when using external
800 * Registrar.
801 */
Jouni Malinen351f09a2008-11-29 22:06:34 +0200802 if (!wps_is_selected_pin_registrar(wps_ie)) {
Jouni Malinena6099152009-01-23 13:10:58 +0200803 if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
804 wpa_printf(MSG_DEBUG, " skip - WPS AP "
805 "without active PIN Registrar");
806 wpabuf_free(wps_ie);
807 return 0;
808 }
809 wpa_printf(MSG_DEBUG, " selected based on WPS IE");
810 } else {
811 wpa_printf(MSG_DEBUG, " selected based on WPS IE "
812 "(Active PIN)");
Jouni Malinen351f09a2008-11-29 22:06:34 +0200813 }
Jouni Malinen351f09a2008-11-29 22:06:34 +0200814 wpabuf_free(wps_ie);
815 return 1;
816 }
817
818 if (wps_ie) {
819 wpa_printf(MSG_DEBUG, " selected based on WPS IE");
820 wpabuf_free(wps_ie);
821 return 1;
822 }
823
824 return -1;
825}
826
827
Jouni Malinena6099152009-01-23 13:10:58 +0200828int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
829 struct wpa_ssid *ssid,
Jouni Malinen351f09a2008-11-29 22:06:34 +0200830 struct wpa_scan_res *bss)
831{
832 struct wpabuf *wps_ie = NULL;
833 int ret = 0;
834
835 if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
836 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
837 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
838 /* allow wildcard SSID for WPS PBC */
839 ret = 1;
840 }
841 } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
842 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
Jouni Malinena6099152009-01-23 13:10:58 +0200843 if (wps_ie &&
844 (wps_is_selected_pin_registrar(wps_ie) ||
845 wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
Jouni Malinen351f09a2008-11-29 22:06:34 +0200846 /* allow wildcard SSID for WPS PIN */
847 ret = 1;
848 }
849 }
850
Jouni Malinen24c23d12008-12-20 22:55:02 +0200851 if (!ret && ssid->bssid_set &&
852 os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
853 /* allow wildcard SSID due to hardcoded BSSID match */
854 ret = 1;
855 }
856
Jouni Malinen351f09a2008-11-29 22:06:34 +0200857 wpabuf_free(wps_ie);
858
859 return ret;
860}
861
862
863int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
864 struct wpa_scan_res *selected,
865 struct wpa_ssid *ssid)
866{
867 const u8 *sel_uuid, *uuid;
868 size_t i;
869 struct wpabuf *wps_ie;
870 int ret = 0;
871
872 if (!eap_is_wps_pbc_enrollee(&ssid->eap))
873 return 0;
874
875 /* Make sure that only one AP is in active PBC mode */
876 wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
877 if (wps_ie)
878 sel_uuid = wps_get_uuid_e(wps_ie);
879 else
880 sel_uuid = NULL;
Jouni Malinen351f09a2008-11-29 22:06:34 +0200881
882 for (i = 0; i < wpa_s->scan_res->num; i++) {
883 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
884 struct wpabuf *ie;
885 if (bss == selected)
886 continue;
887 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
888 if (!ie)
889 continue;
890 if (!wps_is_selected_pbc_registrar(ie)) {
891 wpabuf_free(ie);
892 continue;
893 }
894 uuid = wps_get_uuid_e(ie);
Jouni Malinen44cd4302008-12-21 17:28:01 +0200895 if (sel_uuid == NULL || uuid == NULL ||
896 os_memcmp(sel_uuid, uuid, 16) != 0) {
Jouni Malinen351f09a2008-11-29 22:06:34 +0200897 ret = 1; /* PBC overlap */
898 wpabuf_free(ie);
899 break;
900 }
901
902 /* TODO: verify that this is reasonable dual-band situation */
Jouni Malinen484957a2008-12-15 19:50:53 +0200903
904 wpabuf_free(ie);
Jouni Malinen351f09a2008-11-29 22:06:34 +0200905 }
906
907 wpabuf_free(wps_ie);
908
909 return ret;
910}
Jouni Malinena524f052008-12-15 20:09:57 +0200911
912
913void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
914{
915 size_t i;
916
917 if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
918 return;
919
920 for (i = 0; i < wpa_s->scan_res->num; i++) {
921 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
922 struct wpabuf *ie;
923 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
924 if (!ie)
925 continue;
926 if (wps_is_selected_pbc_registrar(ie))
927 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
928 else if (wps_is_selected_pin_registrar(ie))
929 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
930 else
931 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
932 wpabuf_free(ie);
933 break;
934 }
935}
Jouni Malinen24c23d12008-12-20 22:55:02 +0200936
937
938int wpas_wps_searching(struct wpa_supplicant *wpa_s)
939{
940 struct wpa_ssid *ssid;
941
942 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
943 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
944 return 1;
945 }
946
947 return 0;
948}