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dbus: Share the same function for type to type-as-string conversion
[hostap-gosc2009.git] / src / wps / wps_registrar.c
blobdb20c7da073c2289f19aae18a0e387ea6c3c1022
1 /*
2 * Wi-Fi Protected Setup - Registrar
3 * Copyright (c) 2008-2009, 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 "utils/includes.h"
16
17 #include "utils/common.h"
18 #include "utils/base64.h"
19 #include "utils/eloop.h"
20 #include "utils/uuid.h"
21 #include "utils/list.h"
22 #include "crypto/crypto.h"
23 #include "crypto/sha256.h"
24 #include "common/ieee802_11_defs.h"
25 #include "wps_i.h"
26 #include "wps_dev_attr.h"
27 #include "wps_upnp.h"
28 #include "wps_upnp_i.h"
29
30 #define WPS_WORKAROUNDS
31
32 struct wps_uuid_pin {
33 struct dl_list list;
34 u8 uuid[WPS_UUID_LEN];
35 int wildcard_uuid;
36 u8 *pin;
37 size_t pin_len;
38 #define PIN_LOCKED BIT(0)
39 #define PIN_EXPIRES BIT(1)
40 int flags;
41 struct os_time expiration;
42 };
43
44
45 static void wps_free_pin(struct wps_uuid_pin *pin)
46 {
47 os_free(pin->pin);
48 os_free(pin);
49 }
50
51
52 static void wps_remove_pin(struct wps_uuid_pin *pin)
53 {
54 dl_list_del(&pin->list);
55 wps_free_pin(pin);
56 }
57
58
59 static void wps_free_pins(struct dl_list *pins)
60 {
61 struct wps_uuid_pin *pin, *prev;
62 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
63 wps_remove_pin(pin);
64 }
65
66
67 struct wps_pbc_session {
68 struct wps_pbc_session *next;
69 u8 addr[ETH_ALEN];
70 u8 uuid_e[WPS_UUID_LEN];
71 struct os_time timestamp;
72 };
73
74
75 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
76 {
77 struct wps_pbc_session *prev;
78
79 while (pbc) {
80 prev = pbc;
81 pbc = pbc->next;
82 os_free(prev);
83 }
84 }
85
86
87 struct wps_registrar_device {
88 struct wps_registrar_device *next;
89 struct wps_device_data dev;
90 u8 uuid[WPS_UUID_LEN];
91 };
92
93
94 struct wps_registrar {
95 struct wps_context *wps;
96
97 int pbc;
98 int selected_registrar;
99
100 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
101 size_t psk_len);
102 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
103 struct wpabuf *probe_resp_ie);
104 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
105 const struct wps_device_data *dev);
106 void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
107 const u8 *uuid_e);
108 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
109 u16 sel_reg_config_methods);
110 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
111 const u8 *pri_dev_type, u16 config_methods,
112 u16 dev_password_id, u8 request_type,
113 const char *dev_name);
114 void *cb_ctx;
115
116 struct dl_list pins;
117 struct wps_pbc_session *pbc_sessions;
118
119 int skip_cred_build;
120 struct wpabuf *extra_cred;
121 int disable_auto_conf;
122 int sel_reg_union;
123 int sel_reg_dev_password_id_override;
124 int sel_reg_config_methods_override;
125 int static_wep_only;
126
127 struct wps_registrar_device *devices;
128
129 int force_pbc_overlap;
130 };
131
132
133 static int wps_set_ie(struct wps_registrar *reg);
134 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
135 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
136 void *timeout_ctx);
137
138
139 static void wps_free_devices(struct wps_registrar_device *dev)
140 {
141 struct wps_registrar_device *prev;
142
143 while (dev) {
144 prev = dev;
145 dev = dev->next;
146 wps_device_data_free(&prev->dev);
147 os_free(prev);
148 }
149 }
150
151
152 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
153 const u8 *addr)
154 {
155 struct wps_registrar_device *dev;
156
157 for (dev = reg->devices; dev; dev = dev->next) {
158 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
159 return dev;
160 }
161 return NULL;
162 }
163
164
165 static void wps_device_clone_data(struct wps_device_data *dst,
166 struct wps_device_data *src)
167 {
168 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
169 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
170
171 #define WPS_STRDUP(n) \
172 os_free(dst->n); \
173 dst->n = src->n ? os_strdup(src->n) : NULL
174
175 WPS_STRDUP(device_name);
176 WPS_STRDUP(manufacturer);
177 WPS_STRDUP(model_name);
178 WPS_STRDUP(model_number);
179 WPS_STRDUP(serial_number);
180 #undef WPS_STRDUP
181 }
182
183
184 int wps_device_store(struct wps_registrar *reg,
185 struct wps_device_data *dev, const u8 *uuid)
186 {
187 struct wps_registrar_device *d;
188
189 d = wps_device_get(reg, dev->mac_addr);
190 if (d == NULL) {
191 d = os_zalloc(sizeof(*d));
192 if (d == NULL)
193 return -1;
194 d->next = reg->devices;
195 reg->devices = d;
196 }
197
198 wps_device_clone_data(&d->dev, dev);
199 os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
200
201 return 0;
202 }
203
204
205 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
206 const u8 *addr, const u8 *uuid_e)
207 {
208 struct wps_pbc_session *pbc, *prev = NULL;
209 struct os_time now;
210
211 os_get_time(&now);
212
213 pbc = reg->pbc_sessions;
214 while (pbc) {
215 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
216 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
217 if (prev)
218 prev->next = pbc->next;
219 else
220 reg->pbc_sessions = pbc->next;
221 break;
222 }
223 prev = pbc;
224 pbc = pbc->next;
225 }
226
227 if (!pbc) {
228 pbc = os_zalloc(sizeof(*pbc));
229 if (pbc == NULL)
230 return;
231 os_memcpy(pbc->addr, addr, ETH_ALEN);
232 if (uuid_e)
233 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
234 }
235
236 pbc->next = reg->pbc_sessions;
237 reg->pbc_sessions = pbc;
238 pbc->timestamp = now;
239
240 /* remove entries that have timed out */
241 prev = pbc;
242 pbc = pbc->next;
243
244 while (pbc) {
245 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
246 prev->next = NULL;
247 wps_free_pbc_sessions(pbc);
248 break;
249 }
250 prev = pbc;
251 pbc = pbc->next;
252 }
253 }
254
255
256 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
257 const u8 *addr, const u8 *uuid_e)
258 {
259 struct wps_pbc_session *pbc, *prev = NULL;
260
261 pbc = reg->pbc_sessions;
262 while (pbc) {
263 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
264 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
265 if (prev)
266 prev->next = pbc->next;
267 else
268 reg->pbc_sessions = pbc->next;
269 os_free(pbc);
270 break;
271 }
272 prev = pbc;
273 pbc = pbc->next;
274 }
275 }
276
277
278 static int wps_registrar_pbc_overlap(struct wps_registrar *reg,
279 const u8 *addr, const u8 *uuid_e)
280 {
281 int count = 0;
282 struct wps_pbc_session *pbc;
283 struct os_time now;
284
285 os_get_time(&now);
286
287 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
288 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME)
289 break;
290 if (addr == NULL || os_memcmp(addr, pbc->addr, ETH_ALEN) ||
291 uuid_e == NULL ||
292 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN))
293 count++;
294 }
295
296 if (addr || uuid_e)
297 count++;
298
299 return count > 1 ? 1 : 0;
300 }
301
302
303 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
304 {
305 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
306 wps->wps_state);
307 wpabuf_put_be16(msg, ATTR_WPS_STATE);
308 wpabuf_put_be16(msg, 1);
309 wpabuf_put_u8(msg, wps->wps_state);
310 return 0;
311 }
312
313
314 #ifdef CONFIG_WPS_UPNP
315 static void wps_registrar_free_pending_m2(struct wps_context *wps)
316 {
317 struct upnp_pending_message *p, *p2, *prev = NULL;
318 p = wps->upnp_msgs;
319 while (p) {
320 if (p->type == WPS_M2 || p->type == WPS_M2D) {
321 if (prev == NULL)
322 wps->upnp_msgs = p->next;
323 else
324 prev->next = p->next;
325 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
326 p2 = p;
327 p = p->next;
328 wpabuf_free(p2->msg);
329 os_free(p2);
330 continue;
331 }
332 prev = p;
333 p = p->next;
334 }
335 }
336 #endif /* CONFIG_WPS_UPNP */
337
338
339 static int wps_build_ap_setup_locked(struct wps_context *wps,
340 struct wpabuf *msg)
341 {
342 if (wps->ap_setup_locked) {
343 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
344 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
345 wpabuf_put_be16(msg, 1);
346 wpabuf_put_u8(msg, 1);
347 }
348 return 0;
349 }
350
351
352 static int wps_build_selected_registrar(struct wps_registrar *reg,
353 struct wpabuf *msg)
354 {
355 if (!reg->sel_reg_union)
356 return 0;
357 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
358 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
359 wpabuf_put_be16(msg, 1);
360 wpabuf_put_u8(msg, 1);
361 return 0;
362 }
363
364
365 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
366 struct wpabuf *msg)
367 {
368 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
369 if (!reg->sel_reg_union)
370 return 0;
371 if (reg->sel_reg_dev_password_id_override >= 0)
372 id = reg->sel_reg_dev_password_id_override;
373 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
374 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
375 wpabuf_put_be16(msg, 2);
376 wpabuf_put_be16(msg, id);
377 return 0;
378 }
379
380
381 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
382 struct wpabuf *msg)
383 {
384 u16 methods;
385 if (!reg->sel_reg_union)
386 return 0;
387 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
388 if (reg->pbc)
389 methods |= WPS_CONFIG_PUSHBUTTON;
390 if (reg->sel_reg_config_methods_override >= 0)
391 methods = reg->sel_reg_config_methods_override;
392 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
393 methods);
394 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
395 wpabuf_put_be16(msg, 2);
396 wpabuf_put_be16(msg, methods);
397 return 0;
398 }
399
400
401 static int wps_build_probe_config_methods(struct wps_registrar *reg,
402 struct wpabuf *msg)
403 {
404 u16 methods;
405 methods = 0;
406 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
407 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
408 wpabuf_put_be16(msg, 2);
409 wpabuf_put_be16(msg, methods);
410 return 0;
411 }
412
413
414 static int wps_build_config_methods_r(struct wps_registrar *reg,
415 struct wpabuf *msg)
416 {
417 u16 methods;
418 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
419 if (reg->pbc)
420 methods |= WPS_CONFIG_PUSHBUTTON;
421 return wps_build_config_methods(msg, methods);
422 }
423
424
425 static int wps_build_resp_type(struct wps_registrar *reg, struct wpabuf *msg)
426 {
427 u8 resp = reg->wps->ap ? WPS_RESP_AP : WPS_RESP_REGISTRAR;
428 wpa_printf(MSG_DEBUG, "WPS: * Response Type (%d)", resp);
429 wpabuf_put_be16(msg, ATTR_RESPONSE_TYPE);
430 wpabuf_put_be16(msg, 1);
431 wpabuf_put_u8(msg, resp);
432 return 0;
433 }
434
435
436 /**
437 * wps_registrar_init - Initialize WPS Registrar data
438 * @wps: Pointer to longterm WPS context
439 * @cfg: Registrar configuration
440 * Returns: Pointer to allocated Registrar data or %NULL on failure
441 *
442 * This function is used to initialize WPS Registrar functionality. It can be
443 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
444 * runs (e.g., when run as an internal Registrar in an AP). Caller is
445 * responsible for freeing the returned data with wps_registrar_deinit() when
446 * Registrar functionality is not needed anymore.
447 */
448 struct wps_registrar *
449 wps_registrar_init(struct wps_context *wps,
450 const struct wps_registrar_config *cfg)
451 {
452 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
453 if (reg == NULL)
454 return NULL;
455
456 dl_list_init(&reg->pins);
457 reg->wps = wps;
458 reg->new_psk_cb = cfg->new_psk_cb;
459 reg->set_ie_cb = cfg->set_ie_cb;
460 reg->pin_needed_cb = cfg->pin_needed_cb;
461 reg->reg_success_cb = cfg->reg_success_cb;
462 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
463 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
464 reg->cb_ctx = cfg->cb_ctx;
465 reg->skip_cred_build = cfg->skip_cred_build;
466 if (cfg->extra_cred) {
467 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
468 cfg->extra_cred_len);
469 if (reg->extra_cred == NULL) {
470 os_free(reg);
471 return NULL;
472 }
473 }
474 reg->disable_auto_conf = cfg->disable_auto_conf;
475 reg->sel_reg_dev_password_id_override = -1;
476 reg->sel_reg_config_methods_override = -1;
477 reg->static_wep_only = cfg->static_wep_only;
478
479 if (wps_set_ie(reg)) {
480 wps_registrar_deinit(reg);
481 return NULL;
482 }
483
484 return reg;
485 }
486
487
488 /**
489 * wps_registrar_deinit - Deinitialize WPS Registrar data
490 * @reg: Registrar data from wps_registrar_init()
491 */
492 void wps_registrar_deinit(struct wps_registrar *reg)
493 {
494 if (reg == NULL)
495 return;
496 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
497 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
498 wps_free_pins(&reg->pins);
499 wps_free_pbc_sessions(reg->pbc_sessions);
500 wpabuf_free(reg->extra_cred);
501 wps_free_devices(reg->devices);
502 os_free(reg);
503 }
504
505
506 /**
507 * wps_registrar_add_pin - Configure a new PIN for Registrar
508 * @reg: Registrar data from wps_registrar_init()
509 * @uuid: UUID-E or %NULL for wildcard (any UUID)
510 * @pin: PIN (Device Password)
511 * @pin_len: Length of pin in octets
512 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
513 * Returns: 0 on success, -1 on failure
514 */
515 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *uuid,
516 const u8 *pin, size_t pin_len, int timeout)
517 {
518 struct wps_uuid_pin *p;
519
520 p = os_zalloc(sizeof(*p));
521 if (p == NULL)
522 return -1;
523 if (uuid == NULL)
524 p->wildcard_uuid = 1;
525 else
526 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
527 p->pin = os_malloc(pin_len);
528 if (p->pin == NULL) {
529 os_free(p);
530 return -1;
531 }
532 os_memcpy(p->pin, pin, pin_len);
533 p->pin_len = pin_len;
534
535 if (timeout) {
536 p->flags |= PIN_EXPIRES;
537 os_get_time(&p->expiration);
538 p->expiration.sec += timeout;
539 }
540
541 dl_list_add(&reg->pins, &p->list);
542
543 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
544 timeout);
545 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
546 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
547 reg->selected_registrar = 1;
548 reg->pbc = 0;
549 wps_registrar_selected_registrar_changed(reg);
550 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
551 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
552 wps_registrar_set_selected_timeout,
553 reg, NULL);
554
555 return 0;
556 }
557
558
559 static void wps_registrar_expire_pins(struct wps_registrar *reg)
560 {
561 struct wps_uuid_pin *pin, *prev;
562 struct os_time now;
563
564 os_get_time(&now);
565 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
566 {
567 if ((pin->flags & PIN_EXPIRES) &&
568 os_time_before(&pin->expiration, &now)) {
569 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
570 pin->uuid, WPS_UUID_LEN);
571 wps_remove_pin(pin);
572 }
573 }
574 }
575
576
577 /**
578 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
579 * @reg: Registrar data from wps_registrar_init()
580 * @uuid: UUID-E
581 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
582 */
583 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
584 {
585 struct wps_uuid_pin *pin, *prev;
586
587 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
588 {
589 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
590 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
591 pin->uuid, WPS_UUID_LEN);
592 wps_remove_pin(pin);
593 return 0;
594 }
595 }
596
597 return -1;
598 }
599
600
601 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
602 const u8 *uuid, size_t *pin_len)
603 {
604 struct wps_uuid_pin *pin, *found = NULL;
605
606 wps_registrar_expire_pins(reg);
607
608 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
609 if (!pin->wildcard_uuid &&
610 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
611 found = pin;
612 break;
613 }
614 }
615
616 if (!found) {
617 /* Check for wildcard UUIDs since none of the UUID-specific
618 * PINs matched */
619 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
620 if (pin->wildcard_uuid == 1) {
621 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
622 "PIN. Assigned it for this UUID-E");
623 pin->wildcard_uuid = 2;
624 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
625 found = pin;
626 break;
627 }
628 }
629 }
630
631 if (!found)
632 return NULL;
633
634 /*
635 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
636 * that could otherwise avoid PIN invalidations.
637 */
638 if (found->flags & PIN_LOCKED) {
639 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
640 "allow concurrent re-use");
641 return NULL;
642 }
643 *pin_len = found->pin_len;
644 found->flags |= PIN_LOCKED;
645 return found->pin;
646 }
647
648
649 /**
650 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
651 * @reg: Registrar data from wps_registrar_init()
652 * @uuid: UUID-E
653 * Returns: 0 on success, -1 on failure
654 *
655 * PINs are locked to enforce only one concurrent use. This function unlocks a
656 * PIN to allow it to be used again. If the specified PIN was configured using
657 * a wildcard UUID, it will be removed instead of allowing multiple uses.
658 */
659 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
660 {
661 struct wps_uuid_pin *pin;
662
663 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
664 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
665 if (pin->wildcard_uuid == 2) {
666 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
667 "wildcard PIN");
668 return wps_registrar_invalidate_pin(reg, uuid);
669 }
670 pin->flags &= ~PIN_LOCKED;
671 return 0;
672 }
673 }
674
675 return -1;
676 }
677
678
679 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
680 {
681 reg->selected_registrar = 0;
682 reg->pbc = 0;
683 wps_registrar_selected_registrar_changed(reg);
684 }
685
686
687 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
688 {
689 struct wps_registrar *reg = eloop_ctx;
690
691 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
692 wps_pbc_timeout_event(reg->wps);
693 wps_registrar_stop_pbc(reg);
694 }
695
696
697 /**
698 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
699 * @reg: Registrar data from wps_registrar_init()
700 * Returns: 0 on success, -1 on failure
701 *
702 * This function is called on an AP when a push button is pushed to activate
703 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
704 * or when a PBC registration is completed.
705 */
706 int wps_registrar_button_pushed(struct wps_registrar *reg)
707 {
708 if (wps_registrar_pbc_overlap(reg, NULL, NULL)) {
709 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
710 "mode");
711 wps_pbc_overlap_event(reg->wps);
712 return -1;
713 }
714 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
715 reg->force_pbc_overlap = 0;
716 reg->selected_registrar = 1;
717 reg->pbc = 1;
718 wps_registrar_selected_registrar_changed(reg);
719
720 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
721 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
722 reg, NULL);
723 return 0;
724 }
725
726
727 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
728 {
729 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
730 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
731 wps_registrar_stop_pbc(reg);
732 }
733
734
735 static void wps_registrar_pin_completed(struct wps_registrar *reg)
736 {
737 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
738 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
739 reg->selected_registrar = 0;
740 wps_registrar_selected_registrar_changed(reg);
741 }
742
743
744 /**
745 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
746 * @reg: Registrar data from wps_registrar_init()
747 * @addr: MAC address of the Probe Request sender
748 * @wps_data: WPS IE contents
749 *
750 * This function is called on an AP when a Probe Request with WPS IE is
751 * received. This is used to track PBC mode use and to detect possible overlap
752 * situation with other WPS APs.
753 */
754 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
755 const struct wpabuf *wps_data)
756 {
757 struct wps_parse_attr attr;
758 u16 methods;
759
760 wpa_hexdump_buf(MSG_MSGDUMP,
761 "WPS: Probe Request with WPS data received",
762 wps_data);
763
764 if (wps_parse_msg(wps_data, &attr) < 0)
765 return;
766 if (!wps_version_supported(attr.version)) {
767 wpa_printf(MSG_DEBUG, "WPS: Unsupported ProbeReq WPS IE "
768 "version 0x%x", attr.version ? *attr.version : 0);
769 return;
770 }
771
772 if (attr.config_methods == NULL) {
773 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
774 "Probe Request");
775 return;
776 }
777
778 if (reg->enrollee_seen_cb && attr.dev_password_id && attr.uuid_e &&
779 attr.primary_dev_type && attr.request_type) {
780 char *dev_name = NULL;
781 if (attr.dev_name) {
782 dev_name = os_zalloc(attr.dev_name_len + 1);
783 if (dev_name) {
784 os_memcpy(dev_name, attr.dev_name,
785 attr.dev_name_len);
786 }
787 }
788 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
789 attr.primary_dev_type,
790 WPA_GET_BE16(attr.config_methods),
791 WPA_GET_BE16(attr.dev_password_id),
792 *attr.request_type, dev_name);
793 os_free(dev_name);
794 }
795
796 methods = WPA_GET_BE16(attr.config_methods);
797 if (!(methods & WPS_CONFIG_PUSHBUTTON))
798 return; /* Not PBC */
799
800 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
801 MACSTR, MAC2STR(addr));
802 if (attr.uuid_e == NULL) {
803 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
804 "UUID-E included");
805 return;
806 }
807
808 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
809 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
810 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
811 reg->force_pbc_overlap = 1;
812 wps_pbc_overlap_event(reg->wps);
813 }
814 }
815
816
817 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
818 const u8 *psk, size_t psk_len)
819 {
820 if (reg->new_psk_cb == NULL)
821 return 0;
822
823 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
824 }
825
826
827 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
828 const struct wps_device_data *dev)
829 {
830 if (reg->pin_needed_cb == NULL)
831 return;
832
833 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
834 }
835
836
837 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
838 const u8 *uuid_e)
839 {
840 if (reg->reg_success_cb == NULL)
841 return;
842
843 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
844 }
845
846
847 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
848 struct wpabuf *probe_resp_ie)
849 {
850 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
851 }
852
853
854 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
855 {
856 u16 methods = 0;
857 if (reg->set_sel_reg_cb == NULL)
858 return;
859
860 if (reg->selected_registrar) {
861 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
862 if (reg->pbc)
863 methods |= WPS_CONFIG_PUSHBUTTON;
864 }
865
866 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
867 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
868 methods);
869 }
870
871
872 /* Encapsulate WPS IE data with one (or more, if needed) IE headers */
873 static struct wpabuf * wps_ie_encapsulate(struct wpabuf *data)
874 {
875 struct wpabuf *ie;
876 const u8 *pos, *end;
877
878 ie = wpabuf_alloc(wpabuf_len(data) + 100);
879 if (ie == NULL) {
880 wpabuf_free(data);
881 return NULL;
882 }
883
884 pos = wpabuf_head(data);
885 end = pos + wpabuf_len(data);
886
887 while (end > pos) {
888 size_t frag_len = end - pos;
889 if (frag_len > 251)
890 frag_len = 251;
891 wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
892 wpabuf_put_u8(ie, 4 + frag_len);
893 wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
894 wpabuf_put_data(ie, pos, frag_len);
895 pos += frag_len;
896 }
897
898 wpabuf_free(data);
899
900 return ie;
901 }
902
903
904 static int wps_set_ie(struct wps_registrar *reg)
905 {
906 struct wpabuf *beacon;
907 struct wpabuf *probe;
908
909 if (reg->set_ie_cb == NULL)
910 return 0;
911
912 wpa_printf(MSG_DEBUG, "WPS: Build Beacon and Probe Response IEs");
913
914 beacon = wpabuf_alloc(300);
915 if (beacon == NULL)
916 return -1;
917 probe = wpabuf_alloc(400);
918 if (probe == NULL) {
919 wpabuf_free(beacon);
920 return -1;
921 }
922
923 if (wps_build_version(beacon) ||
924 wps_build_wps_state(reg->wps, beacon) ||
925 wps_build_ap_setup_locked(reg->wps, beacon) ||
926 wps_build_selected_registrar(reg, beacon) ||
927 wps_build_sel_reg_dev_password_id(reg, beacon) ||
928 wps_build_sel_reg_config_methods(reg, beacon) ||
929 wps_build_version(probe) ||
930 wps_build_wps_state(reg->wps, probe) ||
931 wps_build_ap_setup_locked(reg->wps, probe) ||
932 wps_build_selected_registrar(reg, probe) ||
933 wps_build_sel_reg_dev_password_id(reg, probe) ||
934 wps_build_sel_reg_config_methods(reg, probe) ||
935 wps_build_resp_type(reg, probe) ||
936 wps_build_uuid_e(probe, reg->wps->uuid) ||
937 wps_build_device_attrs(&reg->wps->dev, probe) ||
938 wps_build_probe_config_methods(reg, probe) ||
939 wps_build_rf_bands(&reg->wps->dev, probe)) {
940 wpabuf_free(beacon);
941 wpabuf_free(probe);
942 return -1;
943 }
944
945 beacon = wps_ie_encapsulate(beacon);
946 probe = wps_ie_encapsulate(probe);
947
948 if (!beacon || !probe) {
949 wpabuf_free(beacon);
950 wpabuf_free(probe);
951 return -1;
952 }
953
954 if (reg->static_wep_only) {
955 /*
956 * Windows XP and Vista clients can get confused about
957 * EAP-Identity/Request when they probe the network with
958 * EAPOL-Start. In such a case, they may assume the network is
959 * using IEEE 802.1X and prompt user for a certificate while
960 * the correct (non-WPS) behavior would be to ask for the
961 * static WEP key. As a workaround, use Microsoft Provisioning
962 * IE to advertise that legacy 802.1X is not supported.
963 */
964 const u8 ms_wps[7] = {
965 WLAN_EID_VENDOR_SPECIFIC, 5,
966 /* Microsoft Provisioning IE (00:50:f2:5) */
967 0x00, 0x50, 0xf2, 5,
968 0x00 /* no legacy 802.1X or MS WPS */
969 };
970 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
971 "into Beacon/Probe Response frames");
972 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
973 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
974 }
975
976 return wps_cb_set_ie(reg, beacon, probe);
977 }
978
979
980 static int wps_get_dev_password(struct wps_data *wps)
981 {
982 const u8 *pin;
983 size_t pin_len = 0;
984
985 os_free(wps->dev_password);
986 wps->dev_password = NULL;
987
988 if (wps->pbc) {
989 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
990 pin = (const u8 *) "00000000";
991 pin_len = 8;
992 } else {
993 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
994 &pin_len);
995 }
996 if (pin == NULL) {
997 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
998 "the Enrollee");
999 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1000 &wps->peer_dev);
1001 return -1;
1002 }
1003
1004 wps->dev_password = os_malloc(pin_len);
1005 if (wps->dev_password == NULL)
1006 return -1;
1007 os_memcpy(wps->dev_password, pin, pin_len);
1008 wps->dev_password_len = pin_len;
1009
1010 return 0;
1011 }
1012
1013
1014 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1015 {
1016 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1017 wpabuf_put_be16(msg, ATTR_UUID_R);
1018 wpabuf_put_be16(msg, WPS_UUID_LEN);
1019 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1020 return 0;
1021 }
1022
1023
1024 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1025 {
1026 u8 *hash;
1027 const u8 *addr[4];
1028 size_t len[4];
1029
1030 if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1031 return -1;
1032 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1033 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1034 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1035
1036 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1037 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1038 "R-Hash derivation");
1039 return -1;
1040 }
1041
1042 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1043 wpabuf_put_be16(msg, ATTR_R_HASH1);
1044 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1045 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1046 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1047 addr[0] = wps->snonce;
1048 len[0] = WPS_SECRET_NONCE_LEN;
1049 addr[1] = wps->psk1;
1050 len[1] = WPS_PSK_LEN;
1051 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1052 len[2] = wpabuf_len(wps->dh_pubkey_e);
1053 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1054 len[3] = wpabuf_len(wps->dh_pubkey_r);
1055 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1056 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1057
1058 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1059 wpabuf_put_be16(msg, ATTR_R_HASH2);
1060 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1061 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1062 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1063 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1064 addr[1] = wps->psk2;
1065 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1066 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1067
1068 return 0;
1069 }
1070
1071
1072 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1073 {
1074 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1075 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1076 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1077 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1078 return 0;
1079 }
1080
1081
1082 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1083 {
1084 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1085 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1086 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1087 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1088 WPS_SECRET_NONCE_LEN);
1089 return 0;
1090 }
1091
1092
1093 static int wps_build_cred_network_idx(struct wpabuf *msg,
1094 const struct wps_credential *cred)
1095 {
1096 wpa_printf(MSG_DEBUG, "WPS: * Network Index");
1097 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1098 wpabuf_put_be16(msg, 1);
1099 wpabuf_put_u8(msg, 1);
1100 return 0;
1101 }
1102
1103
1104 static int wps_build_cred_ssid(struct wpabuf *msg,
1105 const struct wps_credential *cred)
1106 {
1107 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1108 wpabuf_put_be16(msg, ATTR_SSID);
1109 wpabuf_put_be16(msg, cred->ssid_len);
1110 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1111 return 0;
1112 }
1113
1114
1115 static int wps_build_cred_auth_type(struct wpabuf *msg,
1116 const struct wps_credential *cred)
1117 {
1118 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1119 cred->auth_type);
1120 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1121 wpabuf_put_be16(msg, 2);
1122 wpabuf_put_be16(msg, cred->auth_type);
1123 return 0;
1124 }
1125
1126
1127 static int wps_build_cred_encr_type(struct wpabuf *msg,
1128 const struct wps_credential *cred)
1129 {
1130 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1131 cred->encr_type);
1132 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1133 wpabuf_put_be16(msg, 2);
1134 wpabuf_put_be16(msg, cred->encr_type);
1135 return 0;
1136 }
1137
1138
1139 static int wps_build_cred_network_key(struct wpabuf *msg,
1140 const struct wps_credential *cred)
1141 {
1142 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1143 (int) cred->key_len);
1144 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1145 wpabuf_put_be16(msg, cred->key_len);
1146 wpabuf_put_data(msg, cred->key, cred->key_len);
1147 return 0;
1148 }
1149
1150
1151 static int wps_build_cred_mac_addr(struct wpabuf *msg,
1152 const struct wps_credential *cred)
1153 {
1154 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")",
1155 MAC2STR(cred->mac_addr));
1156 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1157 wpabuf_put_be16(msg, ETH_ALEN);
1158 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1159 return 0;
1160 }
1161
1162
1163 static int wps_build_credential(struct wpabuf *msg,
1164 const struct wps_credential *cred)
1165 {
1166 if (wps_build_cred_network_idx(msg, cred) ||
1167 wps_build_cred_ssid(msg, cred) ||
1168 wps_build_cred_auth_type(msg, cred) ||
1169 wps_build_cred_encr_type(msg, cred) ||
1170 wps_build_cred_network_key(msg, cred) ||
1171 wps_build_cred_mac_addr(msg, cred))
1172 return -1;
1173 return 0;
1174 }
1175
1176
1177 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1178 {
1179 struct wpabuf *cred;
1180
1181 if (wps->wps->registrar->skip_cred_build)
1182 goto skip_cred_build;
1183
1184 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1185 if (wps->use_cred) {
1186 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1187 goto use_provided;
1188 }
1189 os_memset(&wps->cred, 0, sizeof(wps->cred));
1190
1191 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1192 wps->cred.ssid_len = wps->wps->ssid_len;
1193
1194 /* Select the best authentication and encryption type */
1195 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1196 wps->auth_type = WPS_AUTH_WPA2PSK;
1197 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1198 wps->auth_type = WPS_AUTH_WPAPSK;
1199 else if (wps->auth_type & WPS_AUTH_OPEN)
1200 wps->auth_type = WPS_AUTH_OPEN;
1201 else if (wps->auth_type & WPS_AUTH_SHARED)
1202 wps->auth_type = WPS_AUTH_SHARED;
1203 else {
1204 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1205 wps->auth_type);
1206 return -1;
1207 }
1208 wps->cred.auth_type = wps->auth_type;
1209
1210 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1211 wps->auth_type == WPS_AUTH_WPAPSK) {
1212 if (wps->encr_type & WPS_ENCR_AES)
1213 wps->encr_type = WPS_ENCR_AES;
1214 else if (wps->encr_type & WPS_ENCR_TKIP)
1215 wps->encr_type = WPS_ENCR_TKIP;
1216 else {
1217 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1218 "type for WPA/WPA2");
1219 return -1;
1220 }
1221 } else {
1222 if (wps->encr_type & WPS_ENCR_WEP)
1223 wps->encr_type = WPS_ENCR_WEP;
1224 else if (wps->encr_type & WPS_ENCR_NONE)
1225 wps->encr_type = WPS_ENCR_NONE;
1226 else {
1227 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1228 "type for non-WPA/WPA2 mode");
1229 return -1;
1230 }
1231 }
1232 wps->cred.encr_type = wps->encr_type;
1233 /*
1234 * Set MAC address in the Credential to be the Enrollee's MAC address
1235 */
1236 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1237
1238 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1239 !wps->wps->registrar->disable_auto_conf) {
1240 u8 r[16];
1241 /* Generate a random passphrase */
1242 if (os_get_random(r, sizeof(r)) < 0)
1243 return -1;
1244 os_free(wps->new_psk);
1245 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1246 if (wps->new_psk == NULL)
1247 return -1;
1248 wps->new_psk_len--; /* remove newline */
1249 while (wps->new_psk_len &&
1250 wps->new_psk[wps->new_psk_len - 1] == '=')
1251 wps->new_psk_len--;
1252 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1253 wps->new_psk, wps->new_psk_len);
1254 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1255 wps->cred.key_len = wps->new_psk_len;
1256 } else if (wps->use_psk_key && wps->wps->psk_set) {
1257 char hex[65];
1258 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1259 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1260 os_memcpy(wps->cred.key, hex, 32 * 2);
1261 wps->cred.key_len = 32 * 2;
1262 } else if (wps->wps->network_key) {
1263 os_memcpy(wps->cred.key, wps->wps->network_key,
1264 wps->wps->network_key_len);
1265 wps->cred.key_len = wps->wps->network_key_len;
1266 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1267 char hex[65];
1268 /* Generate a random per-device PSK */
1269 os_free(wps->new_psk);
1270 wps->new_psk_len = 32;
1271 wps->new_psk = os_malloc(wps->new_psk_len);
1272 if (wps->new_psk == NULL)
1273 return -1;
1274 if (os_get_random(wps->new_psk, wps->new_psk_len) < 0) {
1275 os_free(wps->new_psk);
1276 wps->new_psk = NULL;
1277 return -1;
1278 }
1279 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1280 wps->new_psk, wps->new_psk_len);
1281 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1282 wps->new_psk_len);
1283 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1284 wps->cred.key_len = wps->new_psk_len * 2;
1285 }
1286
1287 use_provided:
1288 cred = wpabuf_alloc(200);
1289 if (cred == NULL)
1290 return -1;
1291
1292 if (wps_build_credential(cred, &wps->cred)) {
1293 wpabuf_free(cred);
1294 return -1;
1295 }
1296
1297 wpabuf_put_be16(msg, ATTR_CRED);
1298 wpabuf_put_be16(msg, wpabuf_len(cred));
1299 wpabuf_put_buf(msg, cred);
1300 wpabuf_free(cred);
1301
1302 skip_cred_build:
1303 if (wps->wps->registrar->extra_cred) {
1304 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1305 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1306 }
1307
1308 return 0;
1309 }
1310
1311
1312 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1313 {
1314 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1315
1316 if (wps_build_credential(msg, &wps->cred))
1317 return -1;
1318
1319 return 0;
1320 }
1321
1322
1323 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1324 {
1325 struct wpabuf *msg;
1326
1327 if (os_get_random(wps->nonce_r, WPS_NONCE_LEN) < 0)
1328 return NULL;
1329 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1330 wps->nonce_r, WPS_NONCE_LEN);
1331 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1332
1333 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1334 msg = wpabuf_alloc(1000);
1335 if (msg == NULL)
1336 return NULL;
1337
1338 if (wps_build_version(msg) ||
1339 wps_build_msg_type(msg, WPS_M2) ||
1340 wps_build_enrollee_nonce(wps, msg) ||
1341 wps_build_registrar_nonce(wps, msg) ||
1342 wps_build_uuid_r(wps, msg) ||
1343 wps_build_public_key(wps, msg) ||
1344 wps_derive_keys(wps) ||
1345 wps_build_auth_type_flags(wps, msg) ||
1346 wps_build_encr_type_flags(wps, msg) ||
1347 wps_build_conn_type_flags(wps, msg) ||
1348 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1349 wps_build_device_attrs(&wps->wps->dev, msg) ||
1350 wps_build_rf_bands(&wps->wps->dev, msg) ||
1351 wps_build_assoc_state(wps, msg) ||
1352 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1353 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1354 wps_build_os_version(&wps->wps->dev, msg) ||
1355 wps_build_authenticator(wps, msg)) {
1356 wpabuf_free(msg);
1357 return NULL;
1358 }
1359
1360 wps->state = RECV_M3;
1361 return msg;
1362 }
1363
1364
1365 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1366 {
1367 struct wpabuf *msg;
1368 u16 err = wps->config_error;
1369
1370 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1371 msg = wpabuf_alloc(1000);
1372 if (msg == NULL)
1373 return NULL;
1374
1375 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1376 err == WPS_CFG_NO_ERROR)
1377 err = WPS_CFG_SETUP_LOCKED;
1378
1379 if (wps_build_version(msg) ||
1380 wps_build_msg_type(msg, WPS_M2D) ||
1381 wps_build_enrollee_nonce(wps, msg) ||
1382 wps_build_registrar_nonce(wps, msg) ||
1383 wps_build_uuid_r(wps, msg) ||
1384 wps_build_auth_type_flags(wps, msg) ||
1385 wps_build_encr_type_flags(wps, msg) ||
1386 wps_build_conn_type_flags(wps, msg) ||
1387 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1388 wps_build_device_attrs(&wps->wps->dev, msg) ||
1389 wps_build_rf_bands(&wps->wps->dev, msg) ||
1390 wps_build_assoc_state(wps, msg) ||
1391 wps_build_config_error(msg, err) ||
1392 wps_build_os_version(&wps->wps->dev, msg)) {
1393 wpabuf_free(msg);
1394 return NULL;
1395 }
1396
1397 wps->state = RECV_M2D_ACK;
1398 return msg;
1399 }
1400
1401
1402 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1403 {
1404 struct wpabuf *msg, *plain;
1405
1406 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1407
1408 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1409
1410 plain = wpabuf_alloc(200);
1411 if (plain == NULL)
1412 return NULL;
1413
1414 msg = wpabuf_alloc(1000);
1415 if (msg == NULL) {
1416 wpabuf_free(plain);
1417 return NULL;
1418 }
1419
1420 if (wps_build_version(msg) ||
1421 wps_build_msg_type(msg, WPS_M4) ||
1422 wps_build_enrollee_nonce(wps, msg) ||
1423 wps_build_r_hash(wps, msg) ||
1424 wps_build_r_snonce1(wps, plain) ||
1425 wps_build_key_wrap_auth(wps, plain) ||
1426 wps_build_encr_settings(wps, msg, plain) ||
1427 wps_build_authenticator(wps, msg)) {
1428 wpabuf_free(plain);
1429 wpabuf_free(msg);
1430 return NULL;
1431 }
1432 wpabuf_free(plain);
1433
1434 wps->state = RECV_M5;
1435 return msg;
1436 }
1437
1438
1439 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1440 {
1441 struct wpabuf *msg, *plain;
1442
1443 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1444
1445 plain = wpabuf_alloc(200);
1446 if (plain == NULL)
1447 return NULL;
1448
1449 msg = wpabuf_alloc(1000);
1450 if (msg == NULL) {
1451 wpabuf_free(plain);
1452 return NULL;
1453 }
1454
1455 if (wps_build_version(msg) ||
1456 wps_build_msg_type(msg, WPS_M6) ||
1457 wps_build_enrollee_nonce(wps, msg) ||
1458 wps_build_r_snonce2(wps, plain) ||
1459 wps_build_key_wrap_auth(wps, plain) ||
1460 wps_build_encr_settings(wps, msg, plain) ||
1461 wps_build_authenticator(wps, msg)) {
1462 wpabuf_free(plain);
1463 wpabuf_free(msg);
1464 return NULL;
1465 }
1466 wpabuf_free(plain);
1467
1468 wps->wps_pin_revealed = 1;
1469 wps->state = RECV_M7;
1470 return msg;
1471 }
1472
1473
1474 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1475 {
1476 struct wpabuf *msg, *plain;
1477
1478 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1479
1480 plain = wpabuf_alloc(500);
1481 if (plain == NULL)
1482 return NULL;
1483
1484 msg = wpabuf_alloc(1000);
1485 if (msg == NULL) {
1486 wpabuf_free(plain);
1487 return NULL;
1488 }
1489
1490 if (wps_build_version(msg) ||
1491 wps_build_msg_type(msg, WPS_M8) ||
1492 wps_build_enrollee_nonce(wps, msg) ||
1493 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1494 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1495 wps_build_key_wrap_auth(wps, plain) ||
1496 wps_build_encr_settings(wps, msg, plain) ||
1497 wps_build_authenticator(wps, msg)) {
1498 wpabuf_free(plain);
1499 wpabuf_free(msg);
1500 return NULL;
1501 }
1502 wpabuf_free(plain);
1503
1504 wps->state = RECV_DONE;
1505 return msg;
1506 }
1507
1508
1509 static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
1510 {
1511 struct wpabuf *msg;
1512
1513 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
1514
1515 msg = wpabuf_alloc(1000);
1516 if (msg == NULL)
1517 return NULL;
1518
1519 if (wps_build_version(msg) ||
1520 wps_build_msg_type(msg, WPS_WSC_ACK) ||
1521 wps_build_enrollee_nonce(wps, msg) ||
1522 wps_build_registrar_nonce(wps, msg)) {
1523 wpabuf_free(msg);
1524 return NULL;
1525 }
1526
1527 return msg;
1528 }
1529
1530
1531 static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
1532 {
1533 struct wpabuf *msg;
1534
1535 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
1536
1537 msg = wpabuf_alloc(1000);
1538 if (msg == NULL)
1539 return NULL;
1540
1541 if (wps_build_version(msg) ||
1542 wps_build_msg_type(msg, WPS_WSC_NACK) ||
1543 wps_build_enrollee_nonce(wps, msg) ||
1544 wps_build_registrar_nonce(wps, msg) ||
1545 wps_build_config_error(msg, wps->config_error)) {
1546 wpabuf_free(msg);
1547 return NULL;
1548 }
1549
1550 return msg;
1551 }
1552
1553
1554 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1555 enum wsc_op_code *op_code)
1556 {
1557 struct wpabuf *msg;
1558
1559 #ifdef CONFIG_WPS_UPNP
1560 if (wps->wps->wps_upnp) {
1561 struct upnp_pending_message *p, *prev = NULL;
1562 if (wps->ext_reg > 1)
1563 wps_registrar_free_pending_m2(wps->wps);
1564 p = wps->wps->upnp_msgs;
1565 /* TODO: check pending message MAC address */
1566 while (p && p->next) {
1567 prev = p;
1568 p = p->next;
1569 }
1570 if (p) {
1571 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1572 "UPnP");
1573 if (prev)
1574 prev->next = NULL;
1575 else
1576 wps->wps->upnp_msgs = NULL;
1577 msg = p->msg;
1578 switch (p->type) {
1579 case WPS_WSC_ACK:
1580 *op_code = WSC_ACK;
1581 break;
1582 case WPS_WSC_NACK:
1583 *op_code = WSC_NACK;
1584 break;
1585 default:
1586 *op_code = WSC_MSG;
1587 break;
1588 }
1589 os_free(p);
1590 if (wps->ext_reg == 0)
1591 wps->ext_reg = 1;
1592 return msg;
1593 }
1594 }
1595 if (wps->ext_reg) {
1596 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1597 "pending message available");
1598 return NULL;
1599 }
1600 #endif /* CONFIG_WPS_UPNP */
1601
1602 switch (wps->state) {
1603 case SEND_M2:
1604 if (wps_get_dev_password(wps) < 0)
1605 msg = wps_build_m2d(wps);
1606 else
1607 msg = wps_build_m2(wps);
1608 *op_code = WSC_MSG;
1609 break;
1610 case SEND_M2D:
1611 msg = wps_build_m2d(wps);
1612 *op_code = WSC_MSG;
1613 break;
1614 case SEND_M4:
1615 msg = wps_build_m4(wps);
1616 *op_code = WSC_MSG;
1617 break;
1618 case SEND_M6:
1619 msg = wps_build_m6(wps);
1620 *op_code = WSC_MSG;
1621 break;
1622 case SEND_M8:
1623 msg = wps_build_m8(wps);
1624 *op_code = WSC_MSG;
1625 break;
1626 case RECV_DONE:
1627 msg = wps_build_wsc_ack(wps);
1628 *op_code = WSC_ACK;
1629 break;
1630 case SEND_WSC_NACK:
1631 msg = wps_build_wsc_nack(wps);
1632 *op_code = WSC_NACK;
1633 break;
1634 default:
1635 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1636 "a message", wps->state);
1637 msg = NULL;
1638 break;
1639 }
1640
1641 if (*op_code == WSC_MSG && msg) {
1642 /* Save a copy of the last message for Authenticator derivation
1643 */
1644 wpabuf_free(wps->last_msg);
1645 wps->last_msg = wpabuf_dup(msg);
1646 }
1647
1648 return msg;
1649 }
1650
1651
1652 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1653 {
1654 if (e_nonce == NULL) {
1655 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1656 return -1;
1657 }
1658
1659 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1660 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1661 wps->nonce_e, WPS_NONCE_LEN);
1662
1663 return 0;
1664 }
1665
1666
1667 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1668 {
1669 if (r_nonce == NULL) {
1670 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1671 return -1;
1672 }
1673
1674 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1675 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1676 return -1;
1677 }
1678
1679 return 0;
1680 }
1681
1682
1683 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1684 {
1685 if (uuid_e == NULL) {
1686 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1687 return -1;
1688 }
1689
1690 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1691 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1692
1693 return 0;
1694 }
1695
1696
1697 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1698 {
1699 if (pw_id == NULL) {
1700 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1701 return -1;
1702 }
1703
1704 wps->dev_pw_id = WPA_GET_BE16(pw_id);
1705 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1706
1707 return 0;
1708 }
1709
1710
1711 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
1712 {
1713 if (e_hash1 == NULL) {
1714 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
1715 return -1;
1716 }
1717
1718 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
1719 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
1720
1721 return 0;
1722 }
1723
1724
1725 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
1726 {
1727 if (e_hash2 == NULL) {
1728 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
1729 return -1;
1730 }
1731
1732 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
1733 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
1734
1735 return 0;
1736 }
1737
1738
1739 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
1740 {
1741 u8 hash[SHA256_MAC_LEN];
1742 const u8 *addr[4];
1743 size_t len[4];
1744
1745 if (e_snonce1 == NULL) {
1746 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
1747 return -1;
1748 }
1749
1750 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
1751 WPS_SECRET_NONCE_LEN);
1752
1753 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
1754 addr[0] = e_snonce1;
1755 len[0] = WPS_SECRET_NONCE_LEN;
1756 addr[1] = wps->psk1;
1757 len[1] = WPS_PSK_LEN;
1758 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1759 len[2] = wpabuf_len(wps->dh_pubkey_e);
1760 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1761 len[3] = wpabuf_len(wps->dh_pubkey_r);
1762 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1763
1764 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
1765 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
1766 "not match with the pre-committed value");
1767 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
1768 wps_pwd_auth_fail_event(wps->wps, 0, 1);
1769 return -1;
1770 }
1771
1772 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
1773 "half of the device password");
1774
1775 return 0;
1776 }
1777
1778
1779 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
1780 {
1781 u8 hash[SHA256_MAC_LEN];
1782 const u8 *addr[4];
1783 size_t len[4];
1784
1785 if (e_snonce2 == NULL) {
1786 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
1787 return -1;
1788 }
1789
1790 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
1791 WPS_SECRET_NONCE_LEN);
1792
1793 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
1794 addr[0] = e_snonce2;
1795 len[0] = WPS_SECRET_NONCE_LEN;
1796 addr[1] = wps->psk2;
1797 len[1] = WPS_PSK_LEN;
1798 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1799 len[2] = wpabuf_len(wps->dh_pubkey_e);
1800 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1801 len[3] = wpabuf_len(wps->dh_pubkey_r);
1802 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1803
1804 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
1805 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
1806 "not match with the pre-committed value");
1807 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
1808 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
1809 wps_pwd_auth_fail_event(wps->wps, 0, 2);
1810 return -1;
1811 }
1812
1813 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
1814 "half of the device password");
1815 wps->wps_pin_revealed = 0;
1816 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
1817
1818 return 0;
1819 }
1820
1821
1822 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
1823 {
1824 if (mac_addr == NULL) {
1825 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
1826 return -1;
1827 }
1828
1829 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
1830 MAC2STR(mac_addr));
1831 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
1832 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
1833
1834 return 0;
1835 }
1836
1837
1838 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
1839 size_t pk_len)
1840 {
1841 if (pk == NULL || pk_len == 0) {
1842 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
1843 return -1;
1844 }
1845
1846 #ifdef CONFIG_WPS_OOB
1847 if (wps->wps->oob_conf.pubkey_hash != NULL) {
1848 const u8 *addr[1];
1849 u8 hash[WPS_HASH_LEN];
1850
1851 addr[0] = pk;
1852 sha256_vector(1, addr, &pk_len, hash);
1853 if (os_memcmp(hash,
1854 wpabuf_head(wps->wps->oob_conf.pubkey_hash),
1855 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
1856 wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
1857 return -1;
1858 }
1859 }
1860 #endif /* CONFIG_WPS_OOB */
1861
1862 wpabuf_free(wps->dh_pubkey_e);
1863 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
1864 if (wps->dh_pubkey_e == NULL)
1865 return -1;
1866
1867 return 0;
1868 }
1869
1870
1871 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
1872 {
1873 u16 auth_types;
1874
1875 if (auth == NULL) {
1876 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
1877 "received");
1878 return -1;
1879 }
1880
1881 auth_types = WPA_GET_BE16(auth);
1882
1883 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
1884 auth_types);
1885 wps->auth_type = wps->wps->auth_types & auth_types;
1886 if (wps->auth_type == 0) {
1887 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
1888 "authentication types (own 0x%x Enrollee 0x%x)",
1889 wps->wps->auth_types, auth_types);
1890 #ifdef WPS_WORKAROUNDS
1891 /*
1892 * Some deployed implementations seem to advertise incorrect
1893 * information in this attribute. For example, Linksys WRT350N
1894 * seems to have a byteorder bug that breaks this negotiation.
1895 * In order to interoperate with existing implementations,
1896 * assume that the Enrollee supports everything we do.
1897 */
1898 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
1899 "does not advertise supported authentication types "
1900 "correctly");
1901 wps->auth_type = wps->wps->auth_types;
1902 #else /* WPS_WORKAROUNDS */
1903 return -1;
1904 #endif /* WPS_WORKAROUNDS */
1905 }
1906
1907 return 0;
1908 }
1909
1910
1911 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
1912 {
1913 u16 encr_types;
1914
1915 if (encr == NULL) {
1916 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
1917 "received");
1918 return -1;
1919 }
1920
1921 encr_types = WPA_GET_BE16(encr);
1922
1923 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
1924 encr_types);
1925 wps->encr_type = wps->wps->encr_types & encr_types;
1926 if (wps->encr_type == 0) {
1927 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
1928 "encryption types (own 0x%x Enrollee 0x%x)",
1929 wps->wps->encr_types, encr_types);
1930 #ifdef WPS_WORKAROUNDS
1931 /*
1932 * Some deployed implementations seem to advertise incorrect
1933 * information in this attribute. For example, Linksys WRT350N
1934 * seems to have a byteorder bug that breaks this negotiation.
1935 * In order to interoperate with existing implementations,
1936 * assume that the Enrollee supports everything we do.
1937 */
1938 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
1939 "does not advertise supported encryption types "
1940 "correctly");
1941 wps->encr_type = wps->wps->encr_types;
1942 #else /* WPS_WORKAROUNDS */
1943 return -1;
1944 #endif /* WPS_WORKAROUNDS */
1945 }
1946
1947 return 0;
1948 }
1949
1950
1951 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
1952 {
1953 if (conn == NULL) {
1954 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
1955 "received");
1956 return -1;
1957 }
1958
1959 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
1960 *conn);
1961
1962 return 0;
1963 }
1964
1965
1966 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
1967 {
1968 u16 m;
1969
1970 if (methods == NULL) {
1971 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
1972 return -1;
1973 }
1974
1975 m = WPA_GET_BE16(methods);
1976
1977 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
1978 "%s%s%s%s%s%s%s%s%s", m,
1979 m & WPS_CONFIG_USBA ? " [USBA]" : "",
1980 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
1981 m & WPS_CONFIG_LABEL ? " [Label]" : "",
1982 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
1983 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
1984 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
1985 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
1986 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
1987 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
1988
1989 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
1990 /*
1991 * The Enrollee does not have a display so it is unlikely to be
1992 * able to show the passphrase to a user and as such, could
1993 * benefit from receiving PSK to reduce key derivation time.
1994 */
1995 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
1996 "Enrollee not supporting display");
1997 wps->use_psk_key = 1;
1998 }
1999
2000 return 0;
2001 }
2002
2003
2004 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2005 {
2006 if (state == NULL) {
2007 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2008 "received");
2009 return -1;
2010 }
2011
2012 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2013 *state);
2014
2015 return 0;
2016 }
2017
2018
2019 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2020 {
2021 u16 a;
2022
2023 if (assoc == NULL) {
2024 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2025 return -1;
2026 }
2027
2028 a = WPA_GET_BE16(assoc);
2029 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2030
2031 return 0;
2032 }
2033
2034
2035 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2036 {
2037 u16 e;
2038
2039 if (err == NULL) {
2040 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2041 return -1;
2042 }
2043
2044 e = WPA_GET_BE16(err);
2045 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2046
2047 return 0;
2048 }
2049
2050
2051 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2052 struct wps_parse_attr *attr)
2053 {
2054 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2055
2056 if (wps->state != RECV_M1) {
2057 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2058 "receiving M1", wps->state);
2059 return WPS_FAILURE;
2060 }
2061
2062 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2063 wps_process_mac_addr(wps, attr->mac_addr) ||
2064 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2065 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2066 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2067 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2068 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2069 wps_process_config_methods(wps, attr->config_methods) ||
2070 wps_process_wps_state(wps, attr->wps_state) ||
2071 wps_process_device_attrs(&wps->peer_dev, attr) ||
2072 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2073 wps_process_assoc_state(wps, attr->assoc_state) ||
2074 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2075 wps_process_config_error(wps, attr->config_error) ||
2076 wps_process_os_version(&wps->peer_dev, attr->os_version))
2077 return WPS_FAILURE;
2078
2079 if (wps->dev_pw_id < 0x10 &&
2080 wps->dev_pw_id != DEV_PW_DEFAULT &&
2081 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2082 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2083 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2084 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2085 !wps->wps->registrar->pbc)) {
2086 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2087 wps->dev_pw_id);
2088 wps->state = SEND_M2D;
2089 return WPS_CONTINUE;
2090 }
2091
2092 #ifdef CONFIG_WPS_OOB
2093 if (wps->dev_pw_id >= 0x10 &&
2094 wps->dev_pw_id != wps->wps->oob_dev_pw_id) {
2095 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID "
2096 "%d mismatch", wps->dev_pw_id);
2097 wps->state = SEND_M2D;
2098 return WPS_CONTINUE;
2099 }
2100 #endif /* CONFIG_WPS_OOB */
2101
2102 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2103 if (wps->wps->registrar->force_pbc_overlap ||
2104 wps_registrar_pbc_overlap(wps->wps->registrar,
2105 wps->mac_addr_e, wps->uuid_e)) {
2106 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2107 "negotiation");
2108 wps->state = SEND_M2D;
2109 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2110 wps_pbc_overlap_event(wps->wps);
2111 wps->wps->registrar->force_pbc_overlap = 1;
2112 return WPS_CONTINUE;
2113 }
2114 wps_registrar_add_pbc_session(wps->wps->registrar,
2115 wps->mac_addr_e, wps->uuid_e);
2116 wps->pbc = 1;
2117 }
2118
2119 wps->state = SEND_M2;
2120 return WPS_CONTINUE;
2121 }
2122
2123
2124 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2125 const struct wpabuf *msg,
2126 struct wps_parse_attr *attr)
2127 {
2128 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2129
2130 if (wps->state != RECV_M3) {
2131 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2132 "receiving M3", wps->state);
2133 wps->state = SEND_WSC_NACK;
2134 return WPS_CONTINUE;
2135 }
2136
2137 if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2138 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2139 "session overlap");
2140 wps->state = SEND_WSC_NACK;
2141 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2142 return WPS_CONTINUE;
2143 }
2144
2145 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2146 wps_process_authenticator(wps, attr->authenticator, msg) ||
2147 wps_process_e_hash1(wps, attr->e_hash1) ||
2148 wps_process_e_hash2(wps, attr->e_hash2)) {
2149 wps->state = SEND_WSC_NACK;
2150 return WPS_CONTINUE;
2151 }
2152
2153 wps->state = SEND_M4;
2154 return WPS_CONTINUE;
2155 }
2156
2157
2158 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2159 const struct wpabuf *msg,
2160 struct wps_parse_attr *attr)
2161 {
2162 struct wpabuf *decrypted;
2163 struct wps_parse_attr eattr;
2164
2165 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2166
2167 if (wps->state != RECV_M5) {
2168 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2169 "receiving M5", wps->state);
2170 wps->state = SEND_WSC_NACK;
2171 return WPS_CONTINUE;
2172 }
2173
2174 if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2175 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2176 "session overlap");
2177 wps->state = SEND_WSC_NACK;
2178 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2179 return WPS_CONTINUE;
2180 }
2181
2182 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2183 wps_process_authenticator(wps, attr->authenticator, msg)) {
2184 wps->state = SEND_WSC_NACK;
2185 return WPS_CONTINUE;
2186 }
2187
2188 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2189 attr->encr_settings_len);
2190 if (decrypted == NULL) {
2191 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2192 "Settings attribute");
2193 wps->state = SEND_WSC_NACK;
2194 return WPS_CONTINUE;
2195 }
2196
2197 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2198 "attribute");
2199 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2200 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2201 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2202 wpabuf_free(decrypted);
2203 wps->state = SEND_WSC_NACK;
2204 return WPS_CONTINUE;
2205 }
2206 wpabuf_free(decrypted);
2207
2208 wps->state = SEND_M6;
2209 return WPS_CONTINUE;
2210 }
2211
2212
2213 static void wps_sta_cred_cb(struct wps_data *wps)
2214 {
2215 /*
2216 * Update credential to only include a single authentication and
2217 * encryption type in case the AP configuration includes more than one
2218 * option.
2219 */
2220 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2221 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2222 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2223 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2224 if (wps->cred.encr_type & WPS_ENCR_AES)
2225 wps->cred.encr_type = WPS_ENCR_AES;
2226 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2227 wps->cred.encr_type = WPS_ENCR_TKIP;
2228 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2229 "AP configuration");
2230 if (wps->wps->cred_cb)
2231 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2232 }
2233
2234
2235 static void wps_cred_update(struct wps_credential *dst,
2236 struct wps_credential *src)
2237 {
2238 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2239 dst->ssid_len = src->ssid_len;
2240 dst->auth_type = src->auth_type;
2241 dst->encr_type = src->encr_type;
2242 dst->key_idx = src->key_idx;
2243 os_memcpy(dst->key, src->key, sizeof(dst->key));
2244 dst->key_len = src->key_len;
2245 }
2246
2247
2248 static int wps_process_ap_settings_r(struct wps_data *wps,
2249 struct wps_parse_attr *attr)
2250 {
2251 if (wps->wps->ap || wps->er)
2252 return 0;
2253
2254 /* AP Settings Attributes in M7 when Enrollee is an AP */
2255 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2256 return -1;
2257
2258 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2259
2260 if (wps->new_ap_settings) {
2261 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2262 "new settings");
2263 wps_cred_update(&wps->cred, wps->new_ap_settings);
2264 return 0;
2265 } else {
2266 /*
2267 * Use the AP PIN only to receive the current AP settings, not
2268 * to reconfigure the AP.
2269 */
2270 if (wps->ap_settings_cb) {
2271 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2272 &wps->cred);
2273 return 1;
2274 }
2275 wps_sta_cred_cb(wps);
2276 return 1;
2277 }
2278 }
2279
2280
2281 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2282 const struct wpabuf *msg,
2283 struct wps_parse_attr *attr)
2284 {
2285 struct wpabuf *decrypted;
2286 struct wps_parse_attr eattr;
2287
2288 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2289
2290 if (wps->state != RECV_M7) {
2291 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2292 "receiving M7", wps->state);
2293 wps->state = SEND_WSC_NACK;
2294 return WPS_CONTINUE;
2295 }
2296
2297 if (wps->pbc && wps->wps->registrar->force_pbc_overlap) {
2298 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2299 "session overlap");
2300 wps->state = SEND_WSC_NACK;
2301 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2302 return WPS_CONTINUE;
2303 }
2304
2305 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2306 wps_process_authenticator(wps, attr->authenticator, msg)) {
2307 wps->state = SEND_WSC_NACK;
2308 return WPS_CONTINUE;
2309 }
2310
2311 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2312 attr->encr_settings_len);
2313 if (decrypted == NULL) {
2314 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2315 "Settings attribute");
2316 wps->state = SEND_WSC_NACK;
2317 return WPS_CONTINUE;
2318 }
2319
2320 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2321 "attribute");
2322 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2323 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2324 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2325 wps_process_ap_settings_r(wps, &eattr)) {
2326 wpabuf_free(decrypted);
2327 wps->state = SEND_WSC_NACK;
2328 return WPS_CONTINUE;
2329 }
2330
2331 wpabuf_free(decrypted);
2332
2333 wps->state = SEND_M8;
2334 return WPS_CONTINUE;
2335 }
2336
2337
2338 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2339 const struct wpabuf *msg)
2340 {
2341 struct wps_parse_attr attr;
2342 enum wps_process_res ret = WPS_CONTINUE;
2343
2344 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2345
2346 if (wps_parse_msg(msg, &attr) < 0)
2347 return WPS_FAILURE;
2348
2349 if (!wps_version_supported(attr.version)) {
2350 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
2351 attr.version ? *attr.version : 0);
2352 return WPS_FAILURE;
2353 }
2354
2355 if (attr.msg_type == NULL) {
2356 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2357 return WPS_FAILURE;
2358 }
2359
2360 if (*attr.msg_type != WPS_M1 &&
2361 (attr.registrar_nonce == NULL ||
2362 os_memcmp(wps->nonce_r, attr.registrar_nonce,
2363 WPS_NONCE_LEN != 0))) {
2364 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2365 return WPS_FAILURE;
2366 }
2367
2368 switch (*attr.msg_type) {
2369 case WPS_M1:
2370 #ifdef CONFIG_WPS_UPNP
2371 if (wps->wps->wps_upnp && attr.mac_addr) {
2372 /* Remove old pending messages when starting new run */
2373 wps_free_pending_msgs(wps->wps->upnp_msgs);
2374 wps->wps->upnp_msgs = NULL;
2375
2376 upnp_wps_device_send_wlan_event(
2377 wps->wps->wps_upnp, attr.mac_addr,
2378 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2379 }
2380 #endif /* CONFIG_WPS_UPNP */
2381 ret = wps_process_m1(wps, &attr);
2382 break;
2383 case WPS_M3:
2384 ret = wps_process_m3(wps, msg, &attr);
2385 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2386 wps_fail_event(wps->wps, WPS_M3);
2387 break;
2388 case WPS_M5:
2389 ret = wps_process_m5(wps, msg, &attr);
2390 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2391 wps_fail_event(wps->wps, WPS_M5);
2392 break;
2393 case WPS_M7:
2394 ret = wps_process_m7(wps, msg, &attr);
2395 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2396 wps_fail_event(wps->wps, WPS_M7);
2397 break;
2398 default:
2399 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2400 *attr.msg_type);
2401 return WPS_FAILURE;
2402 }
2403
2404 if (ret == WPS_CONTINUE) {
2405 /* Save a copy of the last message for Authenticator derivation
2406 */
2407 wpabuf_free(wps->last_msg);
2408 wps->last_msg = wpabuf_dup(msg);
2409 }
2410
2411 return ret;
2412 }
2413
2414
2415 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2416 const struct wpabuf *msg)
2417 {
2418 struct wps_parse_attr attr;
2419
2420 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2421
2422 if (wps_parse_msg(msg, &attr) < 0)
2423 return WPS_FAILURE;
2424
2425 if (!wps_version_supported(attr.version)) {
2426 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
2427 attr.version ? *attr.version : 0);
2428 return WPS_FAILURE;
2429 }
2430
2431 if (attr.msg_type == NULL) {
2432 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2433 return WPS_FAILURE;
2434 }
2435
2436 if (*attr.msg_type != WPS_WSC_ACK) {
2437 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2438 *attr.msg_type);
2439 return WPS_FAILURE;
2440 }
2441
2442 #ifdef CONFIG_WPS_UPNP
2443 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2444 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2445 if (wps->wps->upnp_msgs)
2446 return WPS_CONTINUE;
2447 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2448 "external Registrar");
2449 return WPS_PENDING;
2450 }
2451 #endif /* CONFIG_WPS_UPNP */
2452
2453 if (attr.registrar_nonce == NULL ||
2454 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2455 {
2456 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2457 return WPS_FAILURE;
2458 }
2459
2460 if (attr.enrollee_nonce == NULL ||
2461 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2462 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2463 return WPS_FAILURE;
2464 }
2465
2466 if (wps->state == RECV_M2D_ACK) {
2467 #ifdef CONFIG_WPS_UPNP
2468 if (wps->wps->wps_upnp &&
2469 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2470 if (wps->wps->upnp_msgs)
2471 return WPS_CONTINUE;
2472 if (wps->ext_reg == 0)
2473 wps->ext_reg = 1;
2474 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2475 "external Registrar");
2476 return WPS_PENDING;
2477 }
2478 #endif /* CONFIG_WPS_UPNP */
2479
2480 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2481 "terminate negotiation");
2482 }
2483
2484 return WPS_FAILURE;
2485 }
2486
2487
2488 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2489 const struct wpabuf *msg)
2490 {
2491 struct wps_parse_attr attr;
2492 int old_state;
2493
2494 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2495
2496 old_state = wps->state;
2497 wps->state = SEND_WSC_NACK;
2498
2499 if (wps_parse_msg(msg, &attr) < 0)
2500 return WPS_FAILURE;
2501
2502 if (!wps_version_supported(attr.version)) {
2503 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
2504 attr.version ? *attr.version : 0);
2505 return WPS_FAILURE;
2506 }
2507
2508 if (attr.msg_type == NULL) {
2509 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2510 return WPS_FAILURE;
2511 }
2512
2513 if (*attr.msg_type != WPS_WSC_NACK) {
2514 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2515 *attr.msg_type);
2516 return WPS_FAILURE;
2517 }
2518
2519 #ifdef CONFIG_WPS_UPNP
2520 if (wps->wps->wps_upnp && wps->ext_reg) {
2521 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2522 "Registrar terminated by the Enrollee");
2523 return WPS_FAILURE;
2524 }
2525 #endif /* CONFIG_WPS_UPNP */
2526
2527 if (attr.registrar_nonce == NULL ||
2528 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2529 {
2530 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2531 return WPS_FAILURE;
2532 }
2533
2534 if (attr.enrollee_nonce == NULL ||
2535 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2536 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2537 return WPS_FAILURE;
2538 }
2539
2540 if (attr.config_error == NULL) {
2541 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2542 "in WSC_NACK");
2543 return WPS_FAILURE;
2544 }
2545
2546 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2547 "Configuration Error %d", WPA_GET_BE16(attr.config_error));
2548
2549 switch (old_state) {
2550 case RECV_M3:
2551 wps_fail_event(wps->wps, WPS_M2);
2552 break;
2553 case RECV_M5:
2554 wps_fail_event(wps->wps, WPS_M4);
2555 break;
2556 case RECV_M7:
2557 wps_fail_event(wps->wps, WPS_M6);
2558 break;
2559 case RECV_DONE:
2560 wps_fail_event(wps->wps, WPS_M8);
2561 break;
2562 default:
2563 break;
2564 }
2565
2566 return WPS_FAILURE;
2567 }
2568
2569
2570 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2571 const struct wpabuf *msg)
2572 {
2573 struct wps_parse_attr attr;
2574
2575 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2576
2577 if (wps->state != RECV_DONE &&
2578 (!wps->wps->wps_upnp || !wps->ext_reg)) {
2579 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2580 "receiving WSC_Done", wps->state);
2581 return WPS_FAILURE;
2582 }
2583
2584 if (wps_parse_msg(msg, &attr) < 0)
2585 return WPS_FAILURE;
2586
2587 if (!wps_version_supported(attr.version)) {
2588 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
2589 attr.version ? *attr.version : 0);
2590 return WPS_FAILURE;
2591 }
2592
2593 if (attr.msg_type == NULL) {
2594 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2595 return WPS_FAILURE;
2596 }
2597
2598 if (*attr.msg_type != WPS_WSC_DONE) {
2599 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2600 *attr.msg_type);
2601 return WPS_FAILURE;
2602 }
2603
2604 #ifdef CONFIG_WPS_UPNP
2605 if (wps->wps->wps_upnp && wps->ext_reg) {
2606 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2607 "Registrar completed successfully");
2608 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2609 wps->uuid_e);
2610 return WPS_DONE;
2611 }
2612 #endif /* CONFIG_WPS_UPNP */
2613
2614 if (attr.registrar_nonce == NULL ||
2615 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2616 {
2617 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2618 return WPS_FAILURE;
2619 }
2620
2621 if (attr.enrollee_nonce == NULL ||
2622 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2623 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2624 return WPS_FAILURE;
2625 }
2626
2627 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
2628 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2629 wps->uuid_e);
2630
2631 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
2632 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
2633 struct wps_credential cred;
2634
2635 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
2636 "on first Enrollee connection");
2637
2638 os_memset(&cred, 0, sizeof(cred));
2639 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
2640 cred.ssid_len = wps->wps->ssid_len;
2641 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
2642 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
2643 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
2644 cred.key_len = wps->new_psk_len;
2645
2646 wps->wps->wps_state = WPS_STATE_CONFIGURED;
2647 wpa_hexdump_ascii_key(MSG_DEBUG,
2648 "WPS: Generated random passphrase",
2649 wps->new_psk, wps->new_psk_len);
2650 if (wps->wps->cred_cb)
2651 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
2652
2653 os_free(wps->new_psk);
2654 wps->new_psk = NULL;
2655 }
2656
2657 if (!wps->wps->ap && !wps->er)
2658 wps_sta_cred_cb(wps);
2659
2660 if (wps->new_psk) {
2661 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
2662 wps->new_psk, wps->new_psk_len)) {
2663 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
2664 "new PSK");
2665 }
2666 os_free(wps->new_psk);
2667 wps->new_psk = NULL;
2668 }
2669
2670 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
2671
2672 if (wps->pbc) {
2673 wps_registrar_remove_pbc_session(wps->wps->registrar,
2674 wps->mac_addr_e, wps->uuid_e);
2675 wps_registrar_pbc_completed(wps->wps->registrar);
2676 } else {
2677 wps_registrar_pin_completed(wps->wps->registrar);
2678 }
2679
2680 wps_success_event(wps->wps);
2681
2682 return WPS_DONE;
2683 }
2684
2685
2686 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
2687 enum wsc_op_code op_code,
2688 const struct wpabuf *msg)
2689 {
2690 enum wps_process_res ret;
2691
2692 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
2693 "op_code=%d)",
2694 (unsigned long) wpabuf_len(msg), op_code);
2695
2696 #ifdef CONFIG_WPS_UPNP
2697 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
2698 struct wps_parse_attr attr;
2699 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
2700 *attr.msg_type == WPS_M3)
2701 wps->ext_reg = 2; /* past M2/M2D phase */
2702 }
2703 if (wps->ext_reg > 1)
2704 wps_registrar_free_pending_m2(wps->wps);
2705 if (wps->wps->wps_upnp && wps->ext_reg &&
2706 wps->wps->upnp_msgs == NULL &&
2707 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
2708 {
2709 struct wps_parse_attr attr;
2710 int type;
2711 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
2712 type = -1;
2713 else
2714 type = *attr.msg_type;
2715 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
2716 " to external Registrar for processing", type);
2717 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
2718 wps->mac_addr_e,
2719 UPNP_WPS_WLANEVENT_TYPE_EAP,
2720 msg);
2721 if (op_code == WSC_MSG)
2722 return WPS_PENDING;
2723 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
2724 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
2725 "external Registrar");
2726 return WPS_CONTINUE;
2727 }
2728 #endif /* CONFIG_WPS_UPNP */
2729
2730 switch (op_code) {
2731 case WSC_MSG:
2732 return wps_process_wsc_msg(wps, msg);
2733 case WSC_ACK:
2734 return wps_process_wsc_ack(wps, msg);
2735 case WSC_NACK:
2736 return wps_process_wsc_nack(wps, msg);
2737 case WSC_Done:
2738 ret = wps_process_wsc_done(wps, msg);
2739 if (ret == WPS_FAILURE) {
2740 wps->state = SEND_WSC_NACK;
2741 wps_fail_event(wps->wps, WPS_WSC_DONE);
2742 }
2743 return ret;
2744 default:
2745 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
2746 return WPS_FAILURE;
2747 }
2748 }
2749
2750
2751 int wps_registrar_update_ie(struct wps_registrar *reg)
2752 {
2753 return wps_set_ie(reg);
2754 }
2755
2756
2757 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
2758 void *timeout_ctx)
2759 {
2760 struct wps_registrar *reg = eloop_ctx;
2761
2762 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
2763 "unselect internal Registrar");
2764 reg->selected_registrar = 0;
2765 reg->pbc = 0;
2766 wps_registrar_selected_registrar_changed(reg);
2767 }
2768
2769
2770 #ifdef CONFIG_WPS_UPNP
2771 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
2772 struct subscription *s)
2773 {
2774 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
2775 "config_methods=0x%x)",
2776 s->dev_password_id, s->config_methods);
2777 reg->sel_reg_union = 1;
2778 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
2779 reg->sel_reg_dev_password_id_override = s->dev_password_id;
2780 if (reg->sel_reg_config_methods_override == -1)
2781 reg->sel_reg_config_methods_override = 0;
2782 reg->sel_reg_config_methods_override |= s->config_methods;
2783 }
2784 #endif /* CONFIG_WPS_UPNP */
2785
2786
2787 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
2788 {
2789 #ifdef CONFIG_WPS_UPNP
2790 struct subscription *s;
2791
2792 if (reg->wps->wps_upnp == NULL)
2793 return;
2794
2795 dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
2796 struct subscription, list) {
2797 struct subscr_addr *sa;
2798 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
2799 if (sa) {
2800 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
2801 inet_ntoa(sa->saddr.sin_addr),
2802 ntohs(sa->saddr.sin_port));
2803 }
2804 if (s->selected_registrar)
2805 wps_registrar_sel_reg_add(reg, s);
2806 else
2807 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
2808 "selected");
2809 }
2810 #endif /* CONFIG_WPS_UPNP */
2811 }
2812
2813
2814 /**
2815 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
2816 * @reg: Registrar data from wps_registrar_init()
2817 *
2818 * This function is called when selected registrar state changes, e.g., when an
2819 * AP receives a SetSelectedRegistrar UPnP message.
2820 */
2821 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
2822 {
2823 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
2824
2825 reg->sel_reg_union = reg->selected_registrar;
2826 reg->sel_reg_dev_password_id_override = -1;
2827 reg->sel_reg_config_methods_override = -1;
2828 if (reg->selected_registrar) {
2829 reg->sel_reg_config_methods_override =
2830 reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
2831 if (reg->pbc) {
2832 reg->sel_reg_dev_password_id_override =
2833 DEV_PW_PUSHBUTTON;
2834 reg->sel_reg_config_methods_override |=
2835 WPS_CONFIG_PUSHBUTTON;
2836 }
2837 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
2838 "(pbc=%d)", reg->pbc);
2839 } else
2840 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
2841
2842 wps_registrar_sel_reg_union(reg);
2843
2844 wps_set_ie(reg);
2845 wps_cb_set_sel_reg(reg);
2846 }
2847
2848
2849 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
2850 char *buf, size_t buflen)
2851 {
2852 struct wps_registrar_device *d;
2853 int len = 0, ret;
2854 char uuid[40];
2855 char devtype[WPS_DEV_TYPE_BUFSIZE];
2856
2857 d = wps_device_get(reg, addr);
2858 if (d == NULL)
2859 return 0;
2860 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
2861 return 0;
2862
2863 ret = os_snprintf(buf + len, buflen - len,
2864 "wpsUuid=%s\n"
2865 "wpsPrimaryDeviceType=%s\n"
2866 "wpsDeviceName=%s\n"
2867 "wpsManufacturer=%s\n"
2868 "wpsModelName=%s\n"
2869 "wpsModelNumber=%s\n"
2870 "wpsSerialNumber=%s\n",
2871 uuid,
2872 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
2873 sizeof(devtype)),
2874 d->dev.device_name ? d->dev.device_name : "",
2875 d->dev.manufacturer ? d->dev.manufacturer : "",
2876 d->dev.model_name ? d->dev.model_name : "",
2877 d->dev.model_number ? d->dev.model_number : "",
2878 d->dev.serial_number ? d->dev.serial_number : "");
2879 if (ret < 0 || (size_t) ret >= buflen - len)
2880 return len;
2881 len += ret;
2882
2883 return len;
2884 }