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gerrit.omnirom.org / android_external_wpa_supplicant_8 / 8d520ff1dc2da35cdca849e982051b86468016d8 / . / src / wps / wps_registrar.c
blob: 65ff40dd610d15d3e724165fac82199c5314b2d2 [file] [log] [blame]
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame^]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 "crypto/random.h"
25#include "common/ieee802_11_defs.h"
26#include "wps_i.h"
27#include "wps_dev_attr.h"
28#include "wps_upnp.h"
29#include "wps_upnp_i.h"
30
31#ifndef CONFIG_WPS_STRICT
32#define WPS_WORKAROUNDS
33#endif /* CONFIG_WPS_STRICT */
34
35struct wps_uuid_pin {
36 struct dl_list list;
37 u8 uuid[WPS_UUID_LEN];
38 int wildcard_uuid;
39 u8 *pin;
40 size_t pin_len;
41#define PIN_LOCKED BIT(0)
42#define PIN_EXPIRES BIT(1)
43 int flags;
44 struct os_time expiration;
45 u8 enrollee_addr[ETH_ALEN];
46};
47
48
49static void wps_free_pin(struct wps_uuid_pin *pin)
50{
51 os_free(pin->pin);
52 os_free(pin);
53}
54
55
56static void wps_remove_pin(struct wps_uuid_pin *pin)
57{
58 dl_list_del(&pin->list);
59 wps_free_pin(pin);
60}
61
62
63static void wps_free_pins(struct dl_list *pins)
64{
65 struct wps_uuid_pin *pin, *prev;
66 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
67 wps_remove_pin(pin);
68}
69
70
71struct wps_pbc_session {
72 struct wps_pbc_session *next;
73 u8 addr[ETH_ALEN];
74 u8 uuid_e[WPS_UUID_LEN];
75 struct os_time timestamp;
76};
77
78
79static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
80{
81 struct wps_pbc_session *prev;
82
83 while (pbc) {
84 prev = pbc;
85 pbc = pbc->next;
86 os_free(prev);
87 }
88}
89
90
91struct wps_registrar_device {
92 struct wps_registrar_device *next;
93 struct wps_device_data dev;
94 u8 uuid[WPS_UUID_LEN];
95};
96
97
98struct wps_registrar {
99 struct wps_context *wps;
100
101 int pbc;
102 int selected_registrar;
103
104 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
105 size_t psk_len);
106 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
107 struct wpabuf *probe_resp_ie);
108 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
109 const struct wps_device_data *dev);
110 void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
111 const u8 *uuid_e);
112 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
113 u16 sel_reg_config_methods);
114 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
115 const u8 *pri_dev_type, u16 config_methods,
116 u16 dev_password_id, u8 request_type,
117 const char *dev_name);
118 void *cb_ctx;
119
120 struct dl_list pins;
121 struct wps_pbc_session *pbc_sessions;
122
123 int skip_cred_build;
124 struct wpabuf *extra_cred;
125 int disable_auto_conf;
126 int sel_reg_union;
127 int sel_reg_dev_password_id_override;
128 int sel_reg_config_methods_override;
129 int static_wep_only;
130 int dualband;
131
132 struct wps_registrar_device *devices;
133
134 int force_pbc_overlap;
135
136 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
137 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
138
139 u8 p2p_dev_addr[ETH_ALEN];
140};
141
142
143static int wps_set_ie(struct wps_registrar *reg);
144static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
145static void wps_registrar_set_selected_timeout(void *eloop_ctx,
146 void *timeout_ctx);
147
148
149static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
150 const u8 *addr)
151{
152 int i;
153 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
154 MAC2STR(addr));
155 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
156 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
157 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
158 "already in the list");
159 return; /* already in list */
160 }
161 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
162 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
163 ETH_ALEN);
164 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
165 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
166 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
167}
168
169
170static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
171 const u8 *addr)
172{
173 int i;
174 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
175 MAC2STR(addr));
176 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
177 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
178 break;
179 }
180 if (i == WPS_MAX_AUTHORIZED_MACS) {
181 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
182 "list");
183 return; /* not in the list */
184 }
185 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
186 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
187 ETH_ALEN);
188 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
189 ETH_ALEN);
190 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
191 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
192}
193
194
195static void wps_free_devices(struct wps_registrar_device *dev)
196{
197 struct wps_registrar_device *prev;
198
199 while (dev) {
200 prev = dev;
201 dev = dev->next;
202 wps_device_data_free(&prev->dev);
203 os_free(prev);
204 }
205}
206
207
208static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
209 const u8 *addr)
210{
211 struct wps_registrar_device *dev;
212
213 for (dev = reg->devices; dev; dev = dev->next) {
214 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
215 return dev;
216 }
217 return NULL;
218}
219
220
221static void wps_device_clone_data(struct wps_device_data *dst,
222 struct wps_device_data *src)
223{
224 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
225 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
226
227#define WPS_STRDUP(n) \
228 os_free(dst->n); \
229 dst->n = src->n ? os_strdup(src->n) : NULL
230
231 WPS_STRDUP(device_name);
232 WPS_STRDUP(manufacturer);
233 WPS_STRDUP(model_name);
234 WPS_STRDUP(model_number);
235 WPS_STRDUP(serial_number);
236#undef WPS_STRDUP
237}
238
239
240int wps_device_store(struct wps_registrar *reg,
241 struct wps_device_data *dev, const u8 *uuid)
242{
243 struct wps_registrar_device *d;
244
245 d = wps_device_get(reg, dev->mac_addr);
246 if (d == NULL) {
247 d = os_zalloc(sizeof(*d));
248 if (d == NULL)
249 return -1;
250 d->next = reg->devices;
251 reg->devices = d;
252 }
253
254 wps_device_clone_data(&d->dev, dev);
255 os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
256
257 return 0;
258}
259
260
261static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
262 const u8 *addr, const u8 *uuid_e)
263{
264 struct wps_pbc_session *pbc, *prev = NULL;
265 struct os_time now;
266
267 os_get_time(&now);
268
269 pbc = reg->pbc_sessions;
270 while (pbc) {
271 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
272 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
273 if (prev)
274 prev->next = pbc->next;
275 else
276 reg->pbc_sessions = pbc->next;
277 break;
278 }
279 prev = pbc;
280 pbc = pbc->next;
281 }
282
283 if (!pbc) {
284 pbc = os_zalloc(sizeof(*pbc));
285 if (pbc == NULL)
286 return;
287 os_memcpy(pbc->addr, addr, ETH_ALEN);
288 if (uuid_e)
289 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
290 }
291
292 pbc->next = reg->pbc_sessions;
293 reg->pbc_sessions = pbc;
294 pbc->timestamp = now;
295
296 /* remove entries that have timed out */
297 prev = pbc;
298 pbc = pbc->next;
299
300 while (pbc) {
301 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
302 prev->next = NULL;
303 wps_free_pbc_sessions(pbc);
304 break;
305 }
306 prev = pbc;
307 pbc = pbc->next;
308 }
309}
310
311
312static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
313 const u8 *uuid_e)
314{
315 struct wps_pbc_session *pbc, *prev = NULL, *tmp;
316
317 pbc = reg->pbc_sessions;
318 while (pbc) {
319 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
320 if (prev)
321 prev->next = pbc->next;
322 else
323 reg->pbc_sessions = pbc->next;
324 tmp = pbc;
325 pbc = pbc->next;
326 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
327 "addr=" MACSTR, MAC2STR(tmp->addr));
328 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
329 tmp->uuid_e, WPS_UUID_LEN);
330 os_free(tmp);
331 continue;
332 }
333 prev = pbc;
334 pbc = pbc->next;
335 }
336}
337
338
339int wps_registrar_pbc_overlap(struct wps_registrar *reg,
340 const u8 *addr, const u8 *uuid_e)
341{
342 int count = 0;
343 struct wps_pbc_session *pbc;
344 struct wps_pbc_session *first = NULL;
345 struct os_time now;
346
347 os_get_time(&now);
348
349 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
350
351 if (uuid_e) {
352 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
353 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
354 uuid_e, WPS_UUID_LEN);
355 count++;
356 }
357
358 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
359 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
360 MAC2STR(pbc->addr));
361 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
362 pbc->uuid_e, WPS_UUID_LEN);
363 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
364 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has "
365 "expired");
366 break;
367 }
368 if (first &&
369 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
370 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
371 continue; /* same Enrollee */
372 }
373 if (uuid_e == NULL ||
374 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
375 wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
376 count++;
377 }
378 if (first == NULL)
379 first = pbc;
380 }
381
382 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
383
384 return count > 1 ? 1 : 0;
385}
386
387
388static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
389{
390 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
391 wps->wps_state);
392 wpabuf_put_be16(msg, ATTR_WPS_STATE);
393 wpabuf_put_be16(msg, 1);
394 wpabuf_put_u8(msg, wps->wps_state);
395 return 0;
396}
397
398
399#ifdef CONFIG_WPS_UPNP
400static void wps_registrar_free_pending_m2(struct wps_context *wps)
401{
402 struct upnp_pending_message *p, *p2, *prev = NULL;
403 p = wps->upnp_msgs;
404 while (p) {
405 if (p->type == WPS_M2 || p->type == WPS_M2D) {
406 if (prev == NULL)
407 wps->upnp_msgs = p->next;
408 else
409 prev->next = p->next;
410 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
411 p2 = p;
412 p = p->next;
413 wpabuf_free(p2->msg);
414 os_free(p2);
415 continue;
416 }
417 prev = p;
418 p = p->next;
419 }
420}
421#endif /* CONFIG_WPS_UPNP */
422
423
424static int wps_build_ap_setup_locked(struct wps_context *wps,
425 struct wpabuf *msg)
426{
427 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
428 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
429 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
430 wpabuf_put_be16(msg, 1);
431 wpabuf_put_u8(msg, 1);
432 }
433 return 0;
434}
435
436
437static int wps_build_selected_registrar(struct wps_registrar *reg,
438 struct wpabuf *msg)
439{
440 if (!reg->sel_reg_union)
441 return 0;
442 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
443 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
444 wpabuf_put_be16(msg, 1);
445 wpabuf_put_u8(msg, 1);
446 return 0;
447}
448
449
450static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
451 struct wpabuf *msg)
452{
453 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
454 if (!reg->sel_reg_union)
455 return 0;
456 if (reg->sel_reg_dev_password_id_override >= 0)
457 id = reg->sel_reg_dev_password_id_override;
458 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
459 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
460 wpabuf_put_be16(msg, 2);
461 wpabuf_put_be16(msg, id);
462 return 0;
463}
464
465
466static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
467 struct wpabuf *msg)
468{
469 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
470 if (!reg->sel_reg_union)
471 return 0;
472 if (reg->sel_reg_dev_password_id_override >= 0)
473 id = reg->sel_reg_dev_password_id_override;
474 if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
475 return 0;
476 return wps_build_uuid_e(msg, reg->wps->uuid);
477}
478
479
480static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
481{
482 *methods |= WPS_CONFIG_PUSHBUTTON;
483#ifdef CONFIG_WPS2
484 if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON)
485 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
486 if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON)
487 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
488 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
489 WPS_CONFIG_VIRT_PUSHBUTTON ||
490 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
491 WPS_CONFIG_PHY_PUSHBUTTON) {
492 /*
493 * Required to include virtual/physical flag, but we were not
494 * configured with push button type, so have to default to one
495 * of them.
496 */
497 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
498 }
499#endif /* CONFIG_WPS2 */
500}
501
502
503static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
504 struct wpabuf *msg)
505{
506 u16 methods;
507 if (!reg->sel_reg_union)
508 return 0;
509 methods = reg->wps->config_methods;
510 methods &= ~WPS_CONFIG_PUSHBUTTON;
511#ifdef CONFIG_WPS2
512 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
513 WPS_CONFIG_PHY_PUSHBUTTON);
514#endif /* CONFIG_WPS2 */
515 if (reg->pbc)
516 wps_set_pushbutton(&methods, reg->wps->config_methods);
517 if (reg->sel_reg_config_methods_override >= 0)
518 methods = reg->sel_reg_config_methods_override;
519 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
520 methods);
521 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
522 wpabuf_put_be16(msg, 2);
523 wpabuf_put_be16(msg, methods);
524 return 0;
525}
526
527
528static int wps_build_probe_config_methods(struct wps_registrar *reg,
529 struct wpabuf *msg)
530{
531 u16 methods;
532 /*
533 * These are the methods that the AP supports as an Enrollee for adding
534 * external Registrars.
535 */
536 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
537#ifdef CONFIG_WPS2
538 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
539 WPS_CONFIG_PHY_PUSHBUTTON);
540#endif /* CONFIG_WPS2 */
541 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
542 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
543 wpabuf_put_be16(msg, 2);
544 wpabuf_put_be16(msg, methods);
545 return 0;
546}
547
548
549static int wps_build_config_methods_r(struct wps_registrar *reg,
550 struct wpabuf *msg)
551{
552 u16 methods;
553 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
554#ifdef CONFIG_WPS2
555 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
556 WPS_CONFIG_PHY_PUSHBUTTON);
557#endif /* CONFIG_WPS2 */
558 if (reg->pbc)
559 wps_set_pushbutton(&methods, reg->wps->config_methods);
560 return wps_build_config_methods(msg, methods);
561}
562
563
564const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
565{
566 *count = 0;
567
568#ifdef CONFIG_WPS2
569 while (*count < WPS_MAX_AUTHORIZED_MACS) {
570 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
571 break;
572 (*count)++;
573 }
574#endif /* CONFIG_WPS2 */
575
576 return (const u8 *) reg->authorized_macs_union;
577}
578
579
580/**
581 * wps_registrar_init - Initialize WPS Registrar data
582 * @wps: Pointer to longterm WPS context
583 * @cfg: Registrar configuration
584 * Returns: Pointer to allocated Registrar data or %NULL on failure
585 *
586 * This function is used to initialize WPS Registrar functionality. It can be
587 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
588 * runs (e.g., when run as an internal Registrar in an AP). Caller is
589 * responsible for freeing the returned data with wps_registrar_deinit() when
590 * Registrar functionality is not needed anymore.
591 */
592struct wps_registrar *
593wps_registrar_init(struct wps_context *wps,
594 const struct wps_registrar_config *cfg)
595{
596 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
597 if (reg == NULL)
598 return NULL;
599
600 dl_list_init(&reg->pins);
601 reg->wps = wps;
602 reg->new_psk_cb = cfg->new_psk_cb;
603 reg->set_ie_cb = cfg->set_ie_cb;
604 reg->pin_needed_cb = cfg->pin_needed_cb;
605 reg->reg_success_cb = cfg->reg_success_cb;
606 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
607 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
608 reg->cb_ctx = cfg->cb_ctx;
609 reg->skip_cred_build = cfg->skip_cred_build;
610 if (cfg->extra_cred) {
611 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
612 cfg->extra_cred_len);
613 if (reg->extra_cred == NULL) {
614 os_free(reg);
615 return NULL;
616 }
617 }
618 reg->disable_auto_conf = cfg->disable_auto_conf;
619 reg->sel_reg_dev_password_id_override = -1;
620 reg->sel_reg_config_methods_override = -1;
621 reg->static_wep_only = cfg->static_wep_only;
622 reg->dualband = cfg->dualband;
623
624 if (wps_set_ie(reg)) {
625 wps_registrar_deinit(reg);
626 return NULL;
627 }
628
629 return reg;
630}
631
632
633/**
634 * wps_registrar_deinit - Deinitialize WPS Registrar data
635 * @reg: Registrar data from wps_registrar_init()
636 */
637void wps_registrar_deinit(struct wps_registrar *reg)
638{
639 if (reg == NULL)
640 return;
641 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
642 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
643 wps_free_pins(&reg->pins);
644 wps_free_pbc_sessions(reg->pbc_sessions);
645 wpabuf_free(reg->extra_cred);
646 wps_free_devices(reg->devices);
647 os_free(reg);
648}
649
650
651/**
652 * wps_registrar_add_pin - Configure a new PIN for Registrar
653 * @reg: Registrar data from wps_registrar_init()
654 * @addr: Enrollee MAC address or %NULL if not known
655 * @uuid: UUID-E or %NULL for wildcard (any UUID)
656 * @pin: PIN (Device Password)
657 * @pin_len: Length of pin in octets
658 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
659 * Returns: 0 on success, -1 on failure
660 */
661int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
662 const u8 *uuid, const u8 *pin, size_t pin_len,
663 int timeout)
664{
665 struct wps_uuid_pin *p;
666
667 p = os_zalloc(sizeof(*p));
668 if (p == NULL)
669 return -1;
670 if (addr)
671 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
672 if (uuid == NULL)
673 p->wildcard_uuid = 1;
674 else
675 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
676 p->pin = os_malloc(pin_len);
677 if (p->pin == NULL) {
678 os_free(p);
679 return -1;
680 }
681 os_memcpy(p->pin, pin, pin_len);
682 p->pin_len = pin_len;
683
684 if (timeout) {
685 p->flags |= PIN_EXPIRES;
686 os_get_time(&p->expiration);
687 p->expiration.sec += timeout;
688 }
689
690 dl_list_add(&reg->pins, &p->list);
691
692 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
693 timeout);
694 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
695 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
696 reg->selected_registrar = 1;
697 reg->pbc = 0;
698 if (addr)
699 wps_registrar_add_authorized_mac(reg, addr);
700 else
701 wps_registrar_add_authorized_mac(
702 reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
703 wps_registrar_selected_registrar_changed(reg);
704 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
705 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
706 wps_registrar_set_selected_timeout,
707 reg, NULL);
708
709 return 0;
710}
711
712
713static void wps_registrar_remove_pin(struct wps_registrar *reg,
714 struct wps_uuid_pin *pin)
715{
716 u8 *addr;
717 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
718
719 if (is_zero_ether_addr(pin->enrollee_addr))
720 addr = bcast;
721 else
722 addr = pin->enrollee_addr;
723 wps_registrar_remove_authorized_mac(reg, addr);
724 wps_remove_pin(pin);
725 wps_registrar_selected_registrar_changed(reg);
726}
727
728
729static void wps_registrar_expire_pins(struct wps_registrar *reg)
730{
731 struct wps_uuid_pin *pin, *prev;
732 struct os_time now;
733
734 os_get_time(&now);
735 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
736 {
737 if ((pin->flags & PIN_EXPIRES) &&
738 os_time_before(&pin->expiration, &now)) {
739 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
740 pin->uuid, WPS_UUID_LEN);
741 wps_registrar_remove_pin(reg, pin);
742 }
743 }
744}
745
746
747/**
748 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
749 * @reg: Registrar data from wps_registrar_init()
750 * Returns: 0 on success, -1 if not wildcard PIN is enabled
751 */
752static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg)
753{
754 struct wps_uuid_pin *pin, *prev;
755
756 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
757 {
758 if (pin->wildcard_uuid) {
759 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
760 pin->uuid, WPS_UUID_LEN);
761 wps_registrar_remove_pin(reg, pin);
762 return 0;
763 }
764 }
765
766 return -1;
767}
768
769
770/**
771 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
772 * @reg: Registrar data from wps_registrar_init()
773 * @uuid: UUID-E
774 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
775 */
776int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
777{
778 struct wps_uuid_pin *pin, *prev;
779
780 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
781 {
782 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
783 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
784 pin->uuid, WPS_UUID_LEN);
785 wps_registrar_remove_pin(reg, pin);
786 return 0;
787 }
788 }
789
790 return -1;
791}
792
793
794static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
795 const u8 *uuid, size_t *pin_len)
796{
797 struct wps_uuid_pin *pin, *found = NULL;
798
799 wps_registrar_expire_pins(reg);
800
801 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
802 if (!pin->wildcard_uuid &&
803 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
804 found = pin;
805 break;
806 }
807 }
808
809 if (!found) {
810 /* Check for wildcard UUIDs since none of the UUID-specific
811 * PINs matched */
812 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
813 if (pin->wildcard_uuid == 1) {
814 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
815 "PIN. Assigned it for this UUID-E");
816 pin->wildcard_uuid = 2;
817 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
818 found = pin;
819 break;
820 }
821 }
822 }
823
824 if (!found)
825 return NULL;
826
827 /*
828 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
829 * that could otherwise avoid PIN invalidations.
830 */
831 if (found->flags & PIN_LOCKED) {
832 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
833 "allow concurrent re-use");
834 return NULL;
835 }
836 *pin_len = found->pin_len;
837 found->flags |= PIN_LOCKED;
838 return found->pin;
839}
840
841
842/**
843 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
844 * @reg: Registrar data from wps_registrar_init()
845 * @uuid: UUID-E
846 * Returns: 0 on success, -1 on failure
847 *
848 * PINs are locked to enforce only one concurrent use. This function unlocks a
849 * PIN to allow it to be used again. If the specified PIN was configured using
850 * a wildcard UUID, it will be removed instead of allowing multiple uses.
851 */
852int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
853{
854 struct wps_uuid_pin *pin;
855
856 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
857 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
858 if (pin->wildcard_uuid == 2) {
859 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
860 "wildcard PIN");
861 return wps_registrar_invalidate_pin(reg, uuid);
862 }
863 pin->flags &= ~PIN_LOCKED;
864 return 0;
865 }
866 }
867
868 return -1;
869}
870
871
872static void wps_registrar_stop_pbc(struct wps_registrar *reg)
873{
874 reg->selected_registrar = 0;
875 reg->pbc = 0;
876 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
877 wps_registrar_remove_authorized_mac(reg,
878 (u8 *) "\xff\xff\xff\xff\xff\xff");
879 wps_registrar_selected_registrar_changed(reg);
880}
881
882
883static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
884{
885 struct wps_registrar *reg = eloop_ctx;
886
887 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
888 wps_pbc_timeout_event(reg->wps);
889 wps_registrar_stop_pbc(reg);
890}
891
892
893/**
894 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
895 * @reg: Registrar data from wps_registrar_init()
896 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
897 * indicates no such filtering
898 * Returns: 0 on success, -1 on failure, -2 on session overlap
899 *
900 * This function is called on an AP when a push button is pushed to activate
901 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
902 * or when a PBC registration is completed. If more than one Enrollee in active
903 * PBC mode has been detected during the monitor time (previous 2 minutes), the
904 * PBC mode is not actived and -2 is returned to indicate session overlap. This
905 * is skipped if a specific Enrollee is selected.
906 */
907int wps_registrar_button_pushed(struct wps_registrar *reg,
908 const u8 *p2p_dev_addr)
909{
910 if (p2p_dev_addr == NULL &&
911 wps_registrar_pbc_overlap(reg, NULL, NULL)) {
912 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
913 "mode");
914 wps_pbc_overlap_event(reg->wps);
915 return -2;
916 }
917 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
918 reg->force_pbc_overlap = 0;
919 reg->selected_registrar = 1;
920 reg->pbc = 1;
921 if (p2p_dev_addr)
922 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
923 else
924 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
925 wps_registrar_add_authorized_mac(reg,
926 (u8 *) "\xff\xff\xff\xff\xff\xff");
927 wps_registrar_selected_registrar_changed(reg);
928
929 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
930 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
931 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
932 reg, NULL);
933 return 0;
934}
935
936
937static void wps_registrar_pbc_completed(struct wps_registrar *reg)
938{
939 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
940 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
941 wps_registrar_stop_pbc(reg);
942}
943
944
945static void wps_registrar_pin_completed(struct wps_registrar *reg)
946{
947 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
948 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
949 reg->selected_registrar = 0;
950 wps_registrar_selected_registrar_changed(reg);
951}
952
953
954int wps_registrar_wps_cancel(struct wps_registrar *reg)
955{
956 if (reg->pbc) {
957 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
958 wps_registrar_pbc_timeout(reg, NULL);
959 return 1;
960 } else if (reg->selected_registrar) {
961 /* PIN Method */
962 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
963 wps_registrar_pin_completed(reg);
964 wps_registrar_invalidate_wildcard_pin(reg);
965 return 1;
966 }
967 return 0;
968}
969
970
971/**
972 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
973 * @reg: Registrar data from wps_registrar_init()
974 * @addr: MAC address of the Probe Request sender
975 * @wps_data: WPS IE contents
976 *
977 * This function is called on an AP when a Probe Request with WPS IE is
978 * received. This is used to track PBC mode use and to detect possible overlap
979 * situation with other WPS APs.
980 */
981void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
982 const struct wpabuf *wps_data,
983 int p2p_wildcard)
984{
985 struct wps_parse_attr attr;
986
987 wpa_hexdump_buf(MSG_MSGDUMP,
988 "WPS: Probe Request with WPS data received",
989 wps_data);
990
991 if (wps_parse_msg(wps_data, &attr) < 0)
992 return;
993
994 if (attr.config_methods == NULL) {
995 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
996 "Probe Request");
997 return;
998 }
999
1000 if (attr.dev_password_id == NULL) {
1001 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1002 "in Probe Request");
1003 return;
1004 }
1005
1006 if (reg->enrollee_seen_cb && attr.uuid_e &&
1007 attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1008 char *dev_name = NULL;
1009 if (attr.dev_name) {
1010 dev_name = os_zalloc(attr.dev_name_len + 1);
1011 if (dev_name) {
1012 os_memcpy(dev_name, attr.dev_name,
1013 attr.dev_name_len);
1014 }
1015 }
1016 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1017 attr.primary_dev_type,
1018 WPA_GET_BE16(attr.config_methods),
1019 WPA_GET_BE16(attr.dev_password_id),
1020 *attr.request_type, dev_name);
1021 os_free(dev_name);
1022 }
1023
1024 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1025 return; /* Not PBC */
1026
1027 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1028 MACSTR, MAC2STR(addr));
1029 if (attr.uuid_e == NULL) {
1030 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1031 "UUID-E included");
1032 return;
1033 }
1034 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1035 WPS_UUID_LEN);
1036
1037 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1038 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1039 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1040 reg->force_pbc_overlap = 1;
1041 wps_pbc_overlap_event(reg->wps);
1042 }
1043}
1044
1045
1046static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1047 const u8 *psk, size_t psk_len)
1048{
1049 if (reg->new_psk_cb == NULL)
1050 return 0;
1051
1052 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1053}
1054
1055
1056static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1057 const struct wps_device_data *dev)
1058{
1059 if (reg->pin_needed_cb == NULL)
1060 return;
1061
1062 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1063}
1064
1065
1066static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1067 const u8 *uuid_e)
1068{
1069 if (reg->reg_success_cb == NULL)
1070 return;
1071
1072 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
1073}
1074
1075
1076static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1077 struct wpabuf *probe_resp_ie)
1078{
1079 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1080}
1081
1082
1083static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1084{
1085 u16 methods = 0;
1086 if (reg->set_sel_reg_cb == NULL)
1087 return;
1088
1089 if (reg->selected_registrar) {
1090 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1091#ifdef CONFIG_WPS2
1092 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1093 WPS_CONFIG_PHY_PUSHBUTTON);
1094#endif /* CONFIG_WPS2 */
1095 if (reg->pbc)
1096 wps_set_pushbutton(&methods, reg->wps->config_methods);
1097 }
1098
1099 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1100 "config_methods=0x%x pbc=%d methods=0x%x",
1101 reg->selected_registrar, reg->wps->config_methods,
1102 reg->pbc, methods);
1103
1104 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1105 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1106 methods);
1107}
1108
1109
1110static int wps_set_ie(struct wps_registrar *reg)
1111{
1112 struct wpabuf *beacon;
1113 struct wpabuf *probe;
1114 const u8 *auth_macs;
1115 size_t count;
1116 size_t vendor_len = 0;
1117 int i;
1118
1119 if (reg->set_ie_cb == NULL)
1120 return 0;
1121
1122 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1123 if (reg->wps->dev.vendor_ext[i]) {
1124 vendor_len += 2 + 2;
1125 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1126 }
1127 }
1128
1129 beacon = wpabuf_alloc(400 + vendor_len);
1130 if (beacon == NULL)
1131 return -1;
1132 probe = wpabuf_alloc(500 + vendor_len);
1133 if (probe == NULL) {
1134 wpabuf_free(beacon);
1135 return -1;
1136 }
1137
1138 auth_macs = wps_authorized_macs(reg, &count);
1139
1140 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1141
1142 if (wps_build_version(beacon) ||
1143 wps_build_wps_state(reg->wps, beacon) ||
1144 wps_build_ap_setup_locked(reg->wps, beacon) ||
1145 wps_build_selected_registrar(reg, beacon) ||
1146 wps_build_sel_reg_dev_password_id(reg, beacon) ||
1147 wps_build_sel_reg_config_methods(reg, beacon) ||
1148 wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1149 (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1150 wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1151 wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1152 wpabuf_free(beacon);
1153 wpabuf_free(probe);
1154 return -1;
1155 }
1156
1157#ifdef CONFIG_P2P
1158 if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1159 wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1160 wpabuf_free(beacon);
1161 wpabuf_free(probe);
1162 return -1;
1163 }
1164#endif /* CONFIG_P2P */
1165
1166 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1167
1168 if (wps_build_version(probe) ||
1169 wps_build_wps_state(reg->wps, probe) ||
1170 wps_build_ap_setup_locked(reg->wps, probe) ||
1171 wps_build_selected_registrar(reg, probe) ||
1172 wps_build_sel_reg_dev_password_id(reg, probe) ||
1173 wps_build_sel_reg_config_methods(reg, probe) ||
1174 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1175 WPS_RESP_REGISTRAR) ||
1176 wps_build_uuid_e(probe, reg->wps->uuid) ||
1177 wps_build_device_attrs(&reg->wps->dev, probe) ||
1178 wps_build_probe_config_methods(reg, probe) ||
1179 wps_build_rf_bands(&reg->wps->dev, probe) ||
1180 wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1181 wps_build_vendor_ext(&reg->wps->dev, probe)) {
1182 wpabuf_free(beacon);
1183 wpabuf_free(probe);
1184 return -1;
1185 }
1186
1187 beacon = wps_ie_encapsulate(beacon);
1188 probe = wps_ie_encapsulate(probe);
1189
1190 if (!beacon || !probe) {
1191 wpabuf_free(beacon);
1192 wpabuf_free(probe);
1193 return -1;
1194 }
1195
1196 if (reg->static_wep_only) {
1197 /*
1198 * Windows XP and Vista clients can get confused about
1199 * EAP-Identity/Request when they probe the network with
1200 * EAPOL-Start. In such a case, they may assume the network is
1201 * using IEEE 802.1X and prompt user for a certificate while
1202 * the correct (non-WPS) behavior would be to ask for the
1203 * static WEP key. As a workaround, use Microsoft Provisioning
1204 * IE to advertise that legacy 802.1X is not supported.
1205 */
1206 const u8 ms_wps[7] = {
1207 WLAN_EID_VENDOR_SPECIFIC, 5,
1208 /* Microsoft Provisioning IE (00:50:f2:5) */
1209 0x00, 0x50, 0xf2, 5,
1210 0x00 /* no legacy 802.1X or MS WPS */
1211 };
1212 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1213 "into Beacon/Probe Response frames");
1214 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1215 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1216 }
1217
1218 return wps_cb_set_ie(reg, beacon, probe);
1219}
1220
1221
1222static int wps_get_dev_password(struct wps_data *wps)
1223{
1224 const u8 *pin;
1225 size_t pin_len = 0;
1226
1227 os_free(wps->dev_password);
1228 wps->dev_password = NULL;
1229
1230 if (wps->pbc) {
1231 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1232 pin = (const u8 *) "00000000";
1233 pin_len = 8;
1234 } else {
1235 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1236 &pin_len);
1237 }
1238 if (pin == NULL) {
1239 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1240 "the Enrollee");
1241 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1242 &wps->peer_dev);
1243 return -1;
1244 }
1245
1246 wps->dev_password = os_malloc(pin_len);
1247 if (wps->dev_password == NULL)
1248 return -1;
1249 os_memcpy(wps->dev_password, pin, pin_len);
1250 wps->dev_password_len = pin_len;
1251
1252 return 0;
1253}
1254
1255
1256static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1257{
1258 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1259 wpabuf_put_be16(msg, ATTR_UUID_R);
1260 wpabuf_put_be16(msg, WPS_UUID_LEN);
1261 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1262 return 0;
1263}
1264
1265
1266static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1267{
1268 u8 *hash;
1269 const u8 *addr[4];
1270 size_t len[4];
1271
1272 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1273 return -1;
1274 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1275 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1276 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1277
1278 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1279 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1280 "R-Hash derivation");
1281 return -1;
1282 }
1283
1284 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1285 wpabuf_put_be16(msg, ATTR_R_HASH1);
1286 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1287 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1288 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1289 addr[0] = wps->snonce;
1290 len[0] = WPS_SECRET_NONCE_LEN;
1291 addr[1] = wps->psk1;
1292 len[1] = WPS_PSK_LEN;
1293 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1294 len[2] = wpabuf_len(wps->dh_pubkey_e);
1295 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1296 len[3] = wpabuf_len(wps->dh_pubkey_r);
1297 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1298 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1299
1300 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1301 wpabuf_put_be16(msg, ATTR_R_HASH2);
1302 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1303 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1304 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1305 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1306 addr[1] = wps->psk2;
1307 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1308 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1309
1310 return 0;
1311}
1312
1313
1314static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1315{
1316 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1317 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1318 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1319 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1320 return 0;
1321}
1322
1323
1324static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1325{
1326 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1327 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1328 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1329 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1330 WPS_SECRET_NONCE_LEN);
1331 return 0;
1332}
1333
1334
1335static int wps_build_cred_network_idx(struct wpabuf *msg,
1336 const struct wps_credential *cred)
1337{
1338 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1339 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1340 wpabuf_put_be16(msg, 1);
1341 wpabuf_put_u8(msg, 1);
1342 return 0;
1343}
1344
1345
1346static int wps_build_cred_ssid(struct wpabuf *msg,
1347 const struct wps_credential *cred)
1348{
1349 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1350 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1351 cred->ssid, cred->ssid_len);
1352 wpabuf_put_be16(msg, ATTR_SSID);
1353 wpabuf_put_be16(msg, cred->ssid_len);
1354 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1355 return 0;
1356}
1357
1358
1359static int wps_build_cred_auth_type(struct wpabuf *msg,
1360 const struct wps_credential *cred)
1361{
1362 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1363 cred->auth_type);
1364 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1365 wpabuf_put_be16(msg, 2);
1366 wpabuf_put_be16(msg, cred->auth_type);
1367 return 0;
1368}
1369
1370
1371static int wps_build_cred_encr_type(struct wpabuf *msg,
1372 const struct wps_credential *cred)
1373{
1374 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1375 cred->encr_type);
1376 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1377 wpabuf_put_be16(msg, 2);
1378 wpabuf_put_be16(msg, cred->encr_type);
1379 return 0;
1380}
1381
1382
1383static int wps_build_cred_network_key(struct wpabuf *msg,
1384 const struct wps_credential *cred)
1385{
1386 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1387 (int) cred->key_len);
1388 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1389 cred->key, cred->key_len);
1390 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1391 wpabuf_put_be16(msg, cred->key_len);
1392 wpabuf_put_data(msg, cred->key, cred->key_len);
1393 return 0;
1394}
1395
1396
1397static int wps_build_cred_mac_addr(struct wpabuf *msg,
1398 const struct wps_credential *cred)
1399{
1400 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")",
1401 MAC2STR(cred->mac_addr));
1402 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1403 wpabuf_put_be16(msg, ETH_ALEN);
1404 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1405 return 0;
1406}
1407
1408
1409static int wps_build_credential(struct wpabuf *msg,
1410 const struct wps_credential *cred)
1411{
1412 if (wps_build_cred_network_idx(msg, cred) ||
1413 wps_build_cred_ssid(msg, cred) ||
1414 wps_build_cred_auth_type(msg, cred) ||
1415 wps_build_cred_encr_type(msg, cred) ||
1416 wps_build_cred_network_key(msg, cred) ||
1417 wps_build_cred_mac_addr(msg, cred))
1418 return -1;
1419 return 0;
1420}
1421
1422
1423int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1424{
1425 struct wpabuf *cred;
1426
1427 if (wps->wps->registrar->skip_cred_build)
1428 goto skip_cred_build;
1429
1430 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1431 if (wps->use_cred) {
1432 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1433 goto use_provided;
1434 }
1435 os_memset(&wps->cred, 0, sizeof(wps->cred));
1436
1437 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1438 wps->cred.ssid_len = wps->wps->ssid_len;
1439
1440 /* Select the best authentication and encryption type */
1441 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1442 wps->auth_type = WPS_AUTH_WPA2PSK;
1443 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1444 wps->auth_type = WPS_AUTH_WPAPSK;
1445 else if (wps->auth_type & WPS_AUTH_OPEN)
1446 wps->auth_type = WPS_AUTH_OPEN;
1447 else if (wps->auth_type & WPS_AUTH_SHARED)
1448 wps->auth_type = WPS_AUTH_SHARED;
1449 else {
1450 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1451 wps->auth_type);
1452 return -1;
1453 }
1454 wps->cred.auth_type = wps->auth_type;
1455
1456 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1457 wps->auth_type == WPS_AUTH_WPAPSK) {
1458 if (wps->encr_type & WPS_ENCR_AES)
1459 wps->encr_type = WPS_ENCR_AES;
1460 else if (wps->encr_type & WPS_ENCR_TKIP)
1461 wps->encr_type = WPS_ENCR_TKIP;
1462 else {
1463 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1464 "type for WPA/WPA2");
1465 return -1;
1466 }
1467 } else {
1468 if (wps->encr_type & WPS_ENCR_WEP)
1469 wps->encr_type = WPS_ENCR_WEP;
1470 else if (wps->encr_type & WPS_ENCR_NONE)
1471 wps->encr_type = WPS_ENCR_NONE;
1472 else {
1473 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1474 "type for non-WPA/WPA2 mode");
1475 return -1;
1476 }
1477 }
1478 wps->cred.encr_type = wps->encr_type;
1479 /*
1480 * Set MAC address in the Credential to be the Enrollee's MAC address
1481 */
1482 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1483
1484 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1485 !wps->wps->registrar->disable_auto_conf) {
1486 u8 r[16];
1487 /* Generate a random passphrase */
1488 if (random_get_bytes(r, sizeof(r)) < 0)
1489 return -1;
1490 os_free(wps->new_psk);
1491 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1492 if (wps->new_psk == NULL)
1493 return -1;
1494 wps->new_psk_len--; /* remove newline */
1495 while (wps->new_psk_len &&
1496 wps->new_psk[wps->new_psk_len - 1] == '=')
1497 wps->new_psk_len--;
1498 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1499 wps->new_psk, wps->new_psk_len);
1500 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1501 wps->cred.key_len = wps->new_psk_len;
1502 } else if (wps->use_psk_key && wps->wps->psk_set) {
1503 char hex[65];
1504 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1505 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1506 os_memcpy(wps->cred.key, hex, 32 * 2);
1507 wps->cred.key_len = 32 * 2;
1508 } else if (wps->wps->network_key) {
1509 os_memcpy(wps->cred.key, wps->wps->network_key,
1510 wps->wps->network_key_len);
1511 wps->cred.key_len = wps->wps->network_key_len;
1512 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1513 char hex[65];
1514 /* Generate a random per-device PSK */
1515 os_free(wps->new_psk);
1516 wps->new_psk_len = 32;
1517 wps->new_psk = os_malloc(wps->new_psk_len);
1518 if (wps->new_psk == NULL)
1519 return -1;
1520 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1521 os_free(wps->new_psk);
1522 wps->new_psk = NULL;
1523 return -1;
1524 }
1525 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1526 wps->new_psk, wps->new_psk_len);
1527 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1528 wps->new_psk_len);
1529 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1530 wps->cred.key_len = wps->new_psk_len * 2;
1531 }
1532
1533use_provided:
1534#ifdef CONFIG_WPS_TESTING
1535 if (wps_testing_dummy_cred)
1536 cred = wpabuf_alloc(200);
1537 else
1538 cred = NULL;
1539 if (cred) {
1540 struct wps_credential dummy;
1541 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1542 os_memset(&dummy, 0, sizeof(dummy));
1543 os_memcpy(dummy.ssid, "dummy", 5);
1544 dummy.ssid_len = 5;
1545 dummy.auth_type = WPS_AUTH_WPA2PSK;
1546 dummy.encr_type = WPS_ENCR_AES;
1547 os_memcpy(dummy.key, "dummy psk", 9);
1548 dummy.key_len = 9;
1549 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1550 wps_build_credential(cred, &dummy);
1551 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1552
1553 wpabuf_put_be16(msg, ATTR_CRED);
1554 wpabuf_put_be16(msg, wpabuf_len(cred));
1555 wpabuf_put_buf(msg, cred);
1556
1557 wpabuf_free(cred);
1558 }
1559#endif /* CONFIG_WPS_TESTING */
1560
1561 cred = wpabuf_alloc(200);
1562 if (cred == NULL)
1563 return -1;
1564
1565 if (wps_build_credential(cred, &wps->cred)) {
1566 wpabuf_free(cred);
1567 return -1;
1568 }
1569
1570 wpabuf_put_be16(msg, ATTR_CRED);
1571 wpabuf_put_be16(msg, wpabuf_len(cred));
1572 wpabuf_put_buf(msg, cred);
1573 wpabuf_free(cred);
1574
1575skip_cred_build:
1576 if (wps->wps->registrar->extra_cred) {
1577 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1578 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1579 }
1580
1581 return 0;
1582}
1583
1584
1585static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1586{
1587 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1588
1589 if (wps_build_credential(msg, &wps->cred))
1590 return -1;
1591
1592 return 0;
1593}
1594
1595
1596static struct wpabuf * wps_build_m2(struct wps_data *wps)
1597{
1598 struct wpabuf *msg;
1599
1600 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1601 return NULL;
1602 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1603 wps->nonce_r, WPS_NONCE_LEN);
1604 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1605
1606 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1607 msg = wpabuf_alloc(1000);
1608 if (msg == NULL)
1609 return NULL;
1610
1611 if (wps_build_version(msg) ||
1612 wps_build_msg_type(msg, WPS_M2) ||
1613 wps_build_enrollee_nonce(wps, msg) ||
1614 wps_build_registrar_nonce(wps, msg) ||
1615 wps_build_uuid_r(wps, msg) ||
1616 wps_build_public_key(wps, msg) ||
1617 wps_derive_keys(wps) ||
1618 wps_build_auth_type_flags(wps, msg) ||
1619 wps_build_encr_type_flags(wps, msg) ||
1620 wps_build_conn_type_flags(wps, msg) ||
1621 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1622 wps_build_device_attrs(&wps->wps->dev, msg) ||
1623 wps_build_rf_bands(&wps->wps->dev, msg) ||
1624 wps_build_assoc_state(wps, msg) ||
1625 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1626 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1627 wps_build_os_version(&wps->wps->dev, msg) ||
1628 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1629 wps_build_authenticator(wps, msg)) {
1630 wpabuf_free(msg);
1631 return NULL;
1632 }
1633
1634 wps->int_reg = 1;
1635 wps->state = RECV_M3;
1636 return msg;
1637}
1638
1639
1640static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1641{
1642 struct wpabuf *msg;
1643 u16 err = wps->config_error;
1644
1645 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1646 msg = wpabuf_alloc(1000);
1647 if (msg == NULL)
1648 return NULL;
1649
1650 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1651 err == WPS_CFG_NO_ERROR)
1652 err = WPS_CFG_SETUP_LOCKED;
1653
1654 if (wps_build_version(msg) ||
1655 wps_build_msg_type(msg, WPS_M2D) ||
1656 wps_build_enrollee_nonce(wps, msg) ||
1657 wps_build_registrar_nonce(wps, msg) ||
1658 wps_build_uuid_r(wps, msg) ||
1659 wps_build_auth_type_flags(wps, msg) ||
1660 wps_build_encr_type_flags(wps, msg) ||
1661 wps_build_conn_type_flags(wps, msg) ||
1662 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1663 wps_build_device_attrs(&wps->wps->dev, msg) ||
1664 wps_build_rf_bands(&wps->wps->dev, msg) ||
1665 wps_build_assoc_state(wps, msg) ||
1666 wps_build_config_error(msg, err) ||
1667 wps_build_os_version(&wps->wps->dev, msg) ||
1668 wps_build_wfa_ext(msg, 0, NULL, 0)) {
1669 wpabuf_free(msg);
1670 return NULL;
1671 }
1672
1673 wps->state = RECV_M2D_ACK;
1674 return msg;
1675}
1676
1677
1678static struct wpabuf * wps_build_m4(struct wps_data *wps)
1679{
1680 struct wpabuf *msg, *plain;
1681
1682 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1683
1684 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1685
1686 plain = wpabuf_alloc(200);
1687 if (plain == NULL)
1688 return NULL;
1689
1690 msg = wpabuf_alloc(1000);
1691 if (msg == NULL) {
1692 wpabuf_free(plain);
1693 return NULL;
1694 }
1695
1696 if (wps_build_version(msg) ||
1697 wps_build_msg_type(msg, WPS_M4) ||
1698 wps_build_enrollee_nonce(wps, msg) ||
1699 wps_build_r_hash(wps, msg) ||
1700 wps_build_r_snonce1(wps, plain) ||
1701 wps_build_key_wrap_auth(wps, plain) ||
1702 wps_build_encr_settings(wps, msg, plain) ||
1703 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1704 wps_build_authenticator(wps, msg)) {
1705 wpabuf_free(plain);
1706 wpabuf_free(msg);
1707 return NULL;
1708 }
1709 wpabuf_free(plain);
1710
1711 wps->state = RECV_M5;
1712 return msg;
1713}
1714
1715
1716static struct wpabuf * wps_build_m6(struct wps_data *wps)
1717{
1718 struct wpabuf *msg, *plain;
1719
1720 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1721
1722 plain = wpabuf_alloc(200);
1723 if (plain == NULL)
1724 return NULL;
1725
1726 msg = wpabuf_alloc(1000);
1727 if (msg == NULL) {
1728 wpabuf_free(plain);
1729 return NULL;
1730 }
1731
1732 if (wps_build_version(msg) ||
1733 wps_build_msg_type(msg, WPS_M6) ||
1734 wps_build_enrollee_nonce(wps, msg) ||
1735 wps_build_r_snonce2(wps, plain) ||
1736 wps_build_key_wrap_auth(wps, plain) ||
1737 wps_build_encr_settings(wps, msg, plain) ||
1738 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1739 wps_build_authenticator(wps, msg)) {
1740 wpabuf_free(plain);
1741 wpabuf_free(msg);
1742 return NULL;
1743 }
1744 wpabuf_free(plain);
1745
1746 wps->wps_pin_revealed = 1;
1747 wps->state = RECV_M7;
1748 return msg;
1749}
1750
1751
1752static struct wpabuf * wps_build_m8(struct wps_data *wps)
1753{
1754 struct wpabuf *msg, *plain;
1755
1756 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1757
1758 plain = wpabuf_alloc(500);
1759 if (plain == NULL)
1760 return NULL;
1761
1762 msg = wpabuf_alloc(1000);
1763 if (msg == NULL) {
1764 wpabuf_free(plain);
1765 return NULL;
1766 }
1767
1768 if (wps_build_version(msg) ||
1769 wps_build_msg_type(msg, WPS_M8) ||
1770 wps_build_enrollee_nonce(wps, msg) ||
1771 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1772 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1773 wps_build_key_wrap_auth(wps, plain) ||
1774 wps_build_encr_settings(wps, msg, plain) ||
1775 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1776 wps_build_authenticator(wps, msg)) {
1777 wpabuf_free(plain);
1778 wpabuf_free(msg);
1779 return NULL;
1780 }
1781 wpabuf_free(plain);
1782
1783 wps->state = RECV_DONE;
1784 return msg;
1785}
1786
1787
1788struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1789 enum wsc_op_code *op_code)
1790{
1791 struct wpabuf *msg;
1792
1793#ifdef CONFIG_WPS_UPNP
1794 if (!wps->int_reg && wps->wps->wps_upnp) {
1795 struct upnp_pending_message *p, *prev = NULL;
1796 if (wps->ext_reg > 1)
1797 wps_registrar_free_pending_m2(wps->wps);
1798 p = wps->wps->upnp_msgs;
1799 /* TODO: check pending message MAC address */
1800 while (p && p->next) {
1801 prev = p;
1802 p = p->next;
1803 }
1804 if (p) {
1805 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1806 "UPnP");
1807 if (prev)
1808 prev->next = NULL;
1809 else
1810 wps->wps->upnp_msgs = NULL;
1811 msg = p->msg;
1812 switch (p->type) {
1813 case WPS_WSC_ACK:
1814 *op_code = WSC_ACK;
1815 break;
1816 case WPS_WSC_NACK:
1817 *op_code = WSC_NACK;
1818 break;
1819 default:
1820 *op_code = WSC_MSG;
1821 break;
1822 }
1823 os_free(p);
1824 if (wps->ext_reg == 0)
1825 wps->ext_reg = 1;
1826 return msg;
1827 }
1828 }
1829 if (wps->ext_reg) {
1830 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1831 "pending message available");
1832 return NULL;
1833 }
1834#endif /* CONFIG_WPS_UPNP */
1835
1836 switch (wps->state) {
1837 case SEND_M2:
1838 if (wps_get_dev_password(wps) < 0)
1839 msg = wps_build_m2d(wps);
1840 else
1841 msg = wps_build_m2(wps);
1842 *op_code = WSC_MSG;
1843 break;
1844 case SEND_M2D:
1845 msg = wps_build_m2d(wps);
1846 *op_code = WSC_MSG;
1847 break;
1848 case SEND_M4:
1849 msg = wps_build_m4(wps);
1850 *op_code = WSC_MSG;
1851 break;
1852 case SEND_M6:
1853 msg = wps_build_m6(wps);
1854 *op_code = WSC_MSG;
1855 break;
1856 case SEND_M8:
1857 msg = wps_build_m8(wps);
1858 *op_code = WSC_MSG;
1859 break;
1860 case RECV_DONE:
1861 msg = wps_build_wsc_ack(wps);
1862 *op_code = WSC_ACK;
1863 break;
1864 case SEND_WSC_NACK:
1865 msg = wps_build_wsc_nack(wps);
1866 *op_code = WSC_NACK;
1867 break;
1868 default:
1869 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1870 "a message", wps->state);
1871 msg = NULL;
1872 break;
1873 }
1874
1875 if (*op_code == WSC_MSG && msg) {
1876 /* Save a copy of the last message for Authenticator derivation
1877 */
1878 wpabuf_free(wps->last_msg);
1879 wps->last_msg = wpabuf_dup(msg);
1880 }
1881
1882 return msg;
1883}
1884
1885
1886static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1887{
1888 if (e_nonce == NULL) {
1889 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1890 return -1;
1891 }
1892
1893 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1894 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1895 wps->nonce_e, WPS_NONCE_LEN);
1896
1897 return 0;
1898}
1899
1900
1901static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1902{
1903 if (r_nonce == NULL) {
1904 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1905 return -1;
1906 }
1907
1908 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1909 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1910 return -1;
1911 }
1912
1913 return 0;
1914}
1915
1916
1917static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1918{
1919 if (uuid_e == NULL) {
1920 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1921 return -1;
1922 }
1923
1924 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1925 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1926
1927 return 0;
1928}
1929
1930
1931static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1932{
1933 if (pw_id == NULL) {
1934 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1935 return -1;
1936 }
1937
1938 wps->dev_pw_id = WPA_GET_BE16(pw_id);
1939 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1940
1941 return 0;
1942}
1943
1944
1945static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
1946{
1947 if (e_hash1 == NULL) {
1948 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
1949 return -1;
1950 }
1951
1952 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
1953 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
1954
1955 return 0;
1956}
1957
1958
1959static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
1960{
1961 if (e_hash2 == NULL) {
1962 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
1963 return -1;
1964 }
1965
1966 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
1967 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
1968
1969 return 0;
1970}
1971
1972
1973static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
1974{
1975 u8 hash[SHA256_MAC_LEN];
1976 const u8 *addr[4];
1977 size_t len[4];
1978
1979 if (e_snonce1 == NULL) {
1980 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
1981 return -1;
1982 }
1983
1984 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
1985 WPS_SECRET_NONCE_LEN);
1986
1987 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
1988 addr[0] = e_snonce1;
1989 len[0] = WPS_SECRET_NONCE_LEN;
1990 addr[1] = wps->psk1;
1991 len[1] = WPS_PSK_LEN;
1992 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1993 len[2] = wpabuf_len(wps->dh_pubkey_e);
1994 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1995 len[3] = wpabuf_len(wps->dh_pubkey_r);
1996 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1997
1998 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
1999 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2000 "not match with the pre-committed value");
2001 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2002 wps_pwd_auth_fail_event(wps->wps, 0, 1);
2003 return -1;
2004 }
2005
2006 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2007 "half of the device password");
2008
2009 return 0;
2010}
2011
2012
2013static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2014{
2015 u8 hash[SHA256_MAC_LEN];
2016 const u8 *addr[4];
2017 size_t len[4];
2018
2019 if (e_snonce2 == NULL) {
2020 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2021 return -1;
2022 }
2023
2024 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2025 WPS_SECRET_NONCE_LEN);
2026
2027 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2028 addr[0] = e_snonce2;
2029 len[0] = WPS_SECRET_NONCE_LEN;
2030 addr[1] = wps->psk2;
2031 len[1] = WPS_PSK_LEN;
2032 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2033 len[2] = wpabuf_len(wps->dh_pubkey_e);
2034 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2035 len[3] = wpabuf_len(wps->dh_pubkey_r);
2036 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2037
2038 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2039 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2040 "not match with the pre-committed value");
2041 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2042 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2043 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2044 return -1;
2045 }
2046
2047 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2048 "half of the device password");
2049 wps->wps_pin_revealed = 0;
2050 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2051
2052 return 0;
2053}
2054
2055
2056static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2057{
2058 if (mac_addr == NULL) {
2059 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2060 return -1;
2061 }
2062
2063 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2064 MAC2STR(mac_addr));
2065 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2066 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2067
2068 return 0;
2069}
2070
2071
2072static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2073 size_t pk_len)
2074{
2075 if (pk == NULL || pk_len == 0) {
2076 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2077 return -1;
2078 }
2079
2080#ifdef CONFIG_WPS_OOB
2081 if (wps->wps->oob_conf.pubkey_hash != NULL) {
2082 const u8 *addr[1];
2083 u8 hash[WPS_HASH_LEN];
2084
2085 addr[0] = pk;
2086 sha256_vector(1, addr, &pk_len, hash);
2087 if (os_memcmp(hash,
2088 wpabuf_head(wps->wps->oob_conf.pubkey_hash),
2089 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2090 wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
2091 return -1;
2092 }
2093 }
2094#endif /* CONFIG_WPS_OOB */
2095
2096 wpabuf_free(wps->dh_pubkey_e);
2097 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2098 if (wps->dh_pubkey_e == NULL)
2099 return -1;
2100
2101 return 0;
2102}
2103
2104
2105static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2106{
2107 u16 auth_types;
2108
2109 if (auth == NULL) {
2110 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2111 "received");
2112 return -1;
2113 }
2114
2115 auth_types = WPA_GET_BE16(auth);
2116
2117 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2118 auth_types);
2119 wps->auth_type = wps->wps->auth_types & auth_types;
2120 if (wps->auth_type == 0) {
2121 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2122 "authentication types (own 0x%x Enrollee 0x%x)",
2123 wps->wps->auth_types, auth_types);
2124#ifdef WPS_WORKAROUNDS
2125 /*
2126 * Some deployed implementations seem to advertise incorrect
2127 * information in this attribute. For example, Linksys WRT350N
2128 * seems to have a byteorder bug that breaks this negotiation.
2129 * In order to interoperate with existing implementations,
2130 * assume that the Enrollee supports everything we do.
2131 */
2132 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2133 "does not advertise supported authentication types "
2134 "correctly");
2135 wps->auth_type = wps->wps->auth_types;
2136#else /* WPS_WORKAROUNDS */
2137 return -1;
2138#endif /* WPS_WORKAROUNDS */
2139 }
2140
2141 return 0;
2142}
2143
2144
2145static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2146{
2147 u16 encr_types;
2148
2149 if (encr == NULL) {
2150 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2151 "received");
2152 return -1;
2153 }
2154
2155 encr_types = WPA_GET_BE16(encr);
2156
2157 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2158 encr_types);
2159 wps->encr_type = wps->wps->encr_types & encr_types;
2160 if (wps->encr_type == 0) {
2161 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2162 "encryption types (own 0x%x Enrollee 0x%x)",
2163 wps->wps->encr_types, encr_types);
2164#ifdef WPS_WORKAROUNDS
2165 /*
2166 * Some deployed implementations seem to advertise incorrect
2167 * information in this attribute. For example, Linksys WRT350N
2168 * seems to have a byteorder bug that breaks this negotiation.
2169 * In order to interoperate with existing implementations,
2170 * assume that the Enrollee supports everything we do.
2171 */
2172 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2173 "does not advertise supported encryption types "
2174 "correctly");
2175 wps->encr_type = wps->wps->encr_types;
2176#else /* WPS_WORKAROUNDS */
2177 return -1;
2178#endif /* WPS_WORKAROUNDS */
2179 }
2180
2181 return 0;
2182}
2183
2184
2185static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2186{
2187 if (conn == NULL) {
2188 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2189 "received");
2190 return -1;
2191 }
2192
2193 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2194 *conn);
2195
2196 return 0;
2197}
2198
2199
2200static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2201{
2202 u16 m;
2203
2204 if (methods == NULL) {
2205 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2206 return -1;
2207 }
2208
2209 m = WPA_GET_BE16(methods);
2210
2211 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2212 "%s%s%s%s%s%s%s%s%s", m,
2213 m & WPS_CONFIG_USBA ? " [USBA]" : "",
2214 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2215 m & WPS_CONFIG_LABEL ? " [Label]" : "",
2216 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2217 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2218 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2219 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2220 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2221 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2222
2223 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2224 /*
2225 * The Enrollee does not have a display so it is unlikely to be
2226 * able to show the passphrase to a user and as such, could
2227 * benefit from receiving PSK to reduce key derivation time.
2228 */
2229 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2230 "Enrollee not supporting display");
2231 wps->use_psk_key = 1;
2232 }
2233
2234 return 0;
2235}
2236
2237
2238static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2239{
2240 if (state == NULL) {
2241 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2242 "received");
2243 return -1;
2244 }
2245
2246 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2247 *state);
2248
2249 return 0;
2250}
2251
2252
2253static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2254{
2255 u16 a;
2256
2257 if (assoc == NULL) {
2258 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2259 return -1;
2260 }
2261
2262 a = WPA_GET_BE16(assoc);
2263 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2264
2265 return 0;
2266}
2267
2268
2269static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2270{
2271 u16 e;
2272
2273 if (err == NULL) {
2274 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2275 return -1;
2276 }
2277
2278 e = WPA_GET_BE16(err);
2279 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2280
2281 return 0;
2282}
2283
2284
2285static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2286{
2287#ifdef CONFIG_P2P
2288 struct wps_registrar *reg = wps->wps->registrar;
2289
2290 if (is_zero_ether_addr(reg->p2p_dev_addr))
2291 return 1; /* no filtering in use */
2292
2293 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2294 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2295 "filtering for PBC: expected " MACSTR " was "
2296 MACSTR " - indicate PBC session overlap",
2297 MAC2STR(reg->p2p_dev_addr),
2298 MAC2STR(wps->p2p_dev_addr));
2299 return 0;
2300 }
2301#endif /* CONFIG_P2P */
2302 return 1;
2303}
2304
2305
2306static int wps_registrar_skip_overlap(struct wps_data *wps)
2307{
2308#ifdef CONFIG_P2P
2309 struct wps_registrar *reg = wps->wps->registrar;
2310
2311 if (is_zero_ether_addr(reg->p2p_dev_addr))
2312 return 0; /* no specific Enrollee selected */
2313
2314 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2315 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2316 "Enrollee match");
2317 return 1;
2318 }
2319#endif /* CONFIG_P2P */
2320 return 0;
2321}
2322
2323
2324static enum wps_process_res wps_process_m1(struct wps_data *wps,
2325 struct wps_parse_attr *attr)
2326{
2327 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2328
2329 if (wps->state != RECV_M1) {
2330 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2331 "receiving M1", wps->state);
2332 return WPS_FAILURE;
2333 }
2334
2335 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2336 wps_process_mac_addr(wps, attr->mac_addr) ||
2337 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2338 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2339 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2340 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2341 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2342 wps_process_config_methods(wps, attr->config_methods) ||
2343 wps_process_wps_state(wps, attr->wps_state) ||
2344 wps_process_device_attrs(&wps->peer_dev, attr) ||
2345 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2346 wps_process_assoc_state(wps, attr->assoc_state) ||
2347 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2348 wps_process_config_error(wps, attr->config_error) ||
2349 wps_process_os_version(&wps->peer_dev, attr->os_version))
2350 return WPS_FAILURE;
2351
2352 if (wps->dev_pw_id < 0x10 &&
2353 wps->dev_pw_id != DEV_PW_DEFAULT &&
2354 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2355 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2356 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2357 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2358 !wps->wps->registrar->pbc)) {
2359 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2360 wps->dev_pw_id);
2361 wps->state = SEND_M2D;
2362 return WPS_CONTINUE;
2363 }
2364
2365#ifdef CONFIG_WPS_OOB
2366 if (wps->dev_pw_id >= 0x10 &&
2367 wps->dev_pw_id != wps->wps->oob_dev_pw_id) {
2368 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID "
2369 "%d mismatch", wps->dev_pw_id);
2370 wps->state = SEND_M2D;
2371 return WPS_CONTINUE;
2372 }
2373#endif /* CONFIG_WPS_OOB */
2374
2375 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2376 if ((wps->wps->registrar->force_pbc_overlap ||
2377 wps_registrar_pbc_overlap(wps->wps->registrar,
2378 wps->mac_addr_e, wps->uuid_e) ||
2379 !wps_registrar_p2p_dev_addr_match(wps)) &&
2380 !wps_registrar_skip_overlap(wps)) {
2381 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2382 "negotiation");
2383 wps->state = SEND_M2D;
2384 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2385 wps_pbc_overlap_event(wps->wps);
2386 wps_fail_event(wps->wps, WPS_M1,
2387 WPS_CFG_MULTIPLE_PBC_DETECTED,
2388 WPS_EI_NO_ERROR);
2389 wps->wps->registrar->force_pbc_overlap = 1;
2390 return WPS_CONTINUE;
2391 }
2392 wps_registrar_add_pbc_session(wps->wps->registrar,
2393 wps->mac_addr_e, wps->uuid_e);
2394 wps->pbc = 1;
2395 }
2396
2397#ifdef WPS_WORKAROUNDS
2398 /*
2399 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2400 * passphrase format. To avoid interop issues, force PSK format to be
2401 * used.
2402 */
2403 if (!wps->use_psk_key &&
2404 wps->peer_dev.manufacturer &&
2405 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2406 wps->peer_dev.model_name &&
2407 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2408 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2409 "PSK format");
2410 wps->use_psk_key = 1;
2411 }
2412#endif /* WPS_WORKAROUNDS */
2413
2414 wps->state = SEND_M2;
2415 return WPS_CONTINUE;
2416}
2417
2418
2419static enum wps_process_res wps_process_m3(struct wps_data *wps,
2420 const struct wpabuf *msg,
2421 struct wps_parse_attr *attr)
2422{
2423 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2424
2425 if (wps->state != RECV_M3) {
2426 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2427 "receiving M3", wps->state);
2428 wps->state = SEND_WSC_NACK;
2429 return WPS_CONTINUE;
2430 }
2431
2432 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2433 !wps_registrar_skip_overlap(wps)) {
2434 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2435 "session overlap");
2436 wps->state = SEND_WSC_NACK;
2437 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2438 return WPS_CONTINUE;
2439 }
2440
2441 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2442 wps_process_authenticator(wps, attr->authenticator, msg) ||
2443 wps_process_e_hash1(wps, attr->e_hash1) ||
2444 wps_process_e_hash2(wps, attr->e_hash2)) {
2445 wps->state = SEND_WSC_NACK;
2446 return WPS_CONTINUE;
2447 }
2448
2449 wps->state = SEND_M4;
2450 return WPS_CONTINUE;
2451}
2452
2453
2454static enum wps_process_res wps_process_m5(struct wps_data *wps,
2455 const struct wpabuf *msg,
2456 struct wps_parse_attr *attr)
2457{
2458 struct wpabuf *decrypted;
2459 struct wps_parse_attr eattr;
2460
2461 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2462
2463 if (wps->state != RECV_M5) {
2464 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2465 "receiving M5", wps->state);
2466 wps->state = SEND_WSC_NACK;
2467 return WPS_CONTINUE;
2468 }
2469
2470 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2471 !wps_registrar_skip_overlap(wps)) {
2472 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2473 "session overlap");
2474 wps->state = SEND_WSC_NACK;
2475 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2476 return WPS_CONTINUE;
2477 }
2478
2479 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2480 wps_process_authenticator(wps, attr->authenticator, msg)) {
2481 wps->state = SEND_WSC_NACK;
2482 return WPS_CONTINUE;
2483 }
2484
2485 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2486 attr->encr_settings_len);
2487 if (decrypted == NULL) {
2488 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2489 "Settings attribute");
2490 wps->state = SEND_WSC_NACK;
2491 return WPS_CONTINUE;
2492 }
2493
2494 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2495 wpabuf_free(decrypted);
2496 wps->state = SEND_WSC_NACK;
2497 return WPS_CONTINUE;
2498 }
2499
2500 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2501 "attribute");
2502 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2503 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2504 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2505 wpabuf_free(decrypted);
2506 wps->state = SEND_WSC_NACK;
2507 return WPS_CONTINUE;
2508 }
2509 wpabuf_free(decrypted);
2510
2511 wps->state = SEND_M6;
2512 return WPS_CONTINUE;
2513}
2514
2515
2516static void wps_sta_cred_cb(struct wps_data *wps)
2517{
2518 /*
2519 * Update credential to only include a single authentication and
2520 * encryption type in case the AP configuration includes more than one
2521 * option.
2522 */
2523 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2524 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2525 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2526 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2527 if (wps->cred.encr_type & WPS_ENCR_AES)
2528 wps->cred.encr_type = WPS_ENCR_AES;
2529 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2530 wps->cred.encr_type = WPS_ENCR_TKIP;
2531 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2532 "AP configuration");
2533 if (wps->wps->cred_cb)
2534 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2535}
2536
2537
2538static void wps_cred_update(struct wps_credential *dst,
2539 struct wps_credential *src)
2540{
2541 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2542 dst->ssid_len = src->ssid_len;
2543 dst->auth_type = src->auth_type;
2544 dst->encr_type = src->encr_type;
2545 dst->key_idx = src->key_idx;
2546 os_memcpy(dst->key, src->key, sizeof(dst->key));
2547 dst->key_len = src->key_len;
2548}
2549
2550
2551static int wps_process_ap_settings_r(struct wps_data *wps,
2552 struct wps_parse_attr *attr)
2553{
2554 if (wps->wps->ap || wps->er)
2555 return 0;
2556
2557 /* AP Settings Attributes in M7 when Enrollee is an AP */
2558 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2559 return -1;
2560
2561 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2562
2563 if (wps->new_ap_settings) {
2564 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2565 "new settings");
2566 wps_cred_update(&wps->cred, wps->new_ap_settings);
2567 return 0;
2568 } else {
2569 /*
2570 * Use the AP PIN only to receive the current AP settings, not
2571 * to reconfigure the AP.
2572 */
2573
2574 /*
2575 * Clear selected registrar here since we do not get to
2576 * WSC_Done in this protocol run.
2577 */
2578 wps_registrar_pin_completed(wps->wps->registrar);
2579
2580 if (wps->ap_settings_cb) {
2581 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2582 &wps->cred);
2583 return 1;
2584 }
2585 wps_sta_cred_cb(wps);
2586 return 1;
2587 }
2588}
2589
2590
2591static enum wps_process_res wps_process_m7(struct wps_data *wps,
2592 const struct wpabuf *msg,
2593 struct wps_parse_attr *attr)
2594{
2595 struct wpabuf *decrypted;
2596 struct wps_parse_attr eattr;
2597
2598 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2599
2600 if (wps->state != RECV_M7) {
2601 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2602 "receiving M7", wps->state);
2603 wps->state = SEND_WSC_NACK;
2604 return WPS_CONTINUE;
2605 }
2606
2607 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2608 !wps_registrar_skip_overlap(wps)) {
2609 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2610 "session overlap");
2611 wps->state = SEND_WSC_NACK;
2612 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2613 return WPS_CONTINUE;
2614 }
2615
2616 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2617 wps_process_authenticator(wps, attr->authenticator, msg)) {
2618 wps->state = SEND_WSC_NACK;
2619 return WPS_CONTINUE;
2620 }
2621
2622 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2623 attr->encr_settings_len);
2624 if (decrypted == NULL) {
2625 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2626 "Settings attribute");
2627 wps->state = SEND_WSC_NACK;
2628 return WPS_CONTINUE;
2629 }
2630
2631 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2632 attr->version2 != NULL) < 0) {
2633 wpabuf_free(decrypted);
2634 wps->state = SEND_WSC_NACK;
2635 return WPS_CONTINUE;
2636 }
2637
2638 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2639 "attribute");
2640 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2641 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2642 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2643 wps_process_ap_settings_r(wps, &eattr)) {
2644 wpabuf_free(decrypted);
2645 wps->state = SEND_WSC_NACK;
2646 return WPS_CONTINUE;
2647 }
2648
2649 wpabuf_free(decrypted);
2650
2651 wps->state = SEND_M8;
2652 return WPS_CONTINUE;
2653}
2654
2655
2656static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2657 const struct wpabuf *msg)
2658{
2659 struct wps_parse_attr attr;
2660 enum wps_process_res ret = WPS_CONTINUE;
2661
2662 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2663
2664 if (wps_parse_msg(msg, &attr) < 0)
2665 return WPS_FAILURE;
2666
2667 if (attr.msg_type == NULL) {
2668 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2669 wps->state = SEND_WSC_NACK;
2670 return WPS_CONTINUE;
2671 }
2672
2673 if (*attr.msg_type != WPS_M1 &&
2674 (attr.registrar_nonce == NULL ||
2675 os_memcmp(wps->nonce_r, attr.registrar_nonce,
2676 WPS_NONCE_LEN != 0))) {
2677 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2678 return WPS_FAILURE;
2679 }
2680
2681 switch (*attr.msg_type) {
2682 case WPS_M1:
2683 if (wps_validate_m1(msg) < 0)
2684 return WPS_FAILURE;
2685#ifdef CONFIG_WPS_UPNP
2686 if (wps->wps->wps_upnp && attr.mac_addr) {
2687 /* Remove old pending messages when starting new run */
2688 wps_free_pending_msgs(wps->wps->upnp_msgs);
2689 wps->wps->upnp_msgs = NULL;
2690
2691 upnp_wps_device_send_wlan_event(
2692 wps->wps->wps_upnp, attr.mac_addr,
2693 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2694 }
2695#endif /* CONFIG_WPS_UPNP */
2696 ret = wps_process_m1(wps, &attr);
2697 break;
2698 case WPS_M3:
2699 if (wps_validate_m3(msg) < 0)
2700 return WPS_FAILURE;
2701 ret = wps_process_m3(wps, msg, &attr);
2702 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2703 wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2704 wps->error_indication);
2705 break;
2706 case WPS_M5:
2707 if (wps_validate_m5(msg) < 0)
2708 return WPS_FAILURE;
2709 ret = wps_process_m5(wps, msg, &attr);
2710 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2711 wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2712 wps->error_indication);
2713 break;
2714 case WPS_M7:
2715 if (wps_validate_m7(msg) < 0)
2716 return WPS_FAILURE;
2717 ret = wps_process_m7(wps, msg, &attr);
2718 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2719 wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2720 wps->error_indication);
2721 break;
2722 default:
2723 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2724 *attr.msg_type);
2725 return WPS_FAILURE;
2726 }
2727
2728 if (ret == WPS_CONTINUE) {
2729 /* Save a copy of the last message for Authenticator derivation
2730 */
2731 wpabuf_free(wps->last_msg);
2732 wps->last_msg = wpabuf_dup(msg);
2733 }
2734
2735 return ret;
2736}
2737
2738
2739static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2740 const struct wpabuf *msg)
2741{
2742 struct wps_parse_attr attr;
2743
2744 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2745
2746 if (wps_parse_msg(msg, &attr) < 0)
2747 return WPS_FAILURE;
2748
2749 if (attr.msg_type == NULL) {
2750 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2751 return WPS_FAILURE;
2752 }
2753
2754 if (*attr.msg_type != WPS_WSC_ACK) {
2755 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2756 *attr.msg_type);
2757 return WPS_FAILURE;
2758 }
2759
2760#ifdef CONFIG_WPS_UPNP
2761 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2762 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2763 if (wps->wps->upnp_msgs)
2764 return WPS_CONTINUE;
2765 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2766 "external Registrar");
2767 return WPS_PENDING;
2768 }
2769#endif /* CONFIG_WPS_UPNP */
2770
2771 if (attr.registrar_nonce == NULL ||
2772 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2773 {
2774 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2775 return WPS_FAILURE;
2776 }
2777
2778 if (attr.enrollee_nonce == NULL ||
2779 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2780 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2781 return WPS_FAILURE;
2782 }
2783
2784 if (wps->state == RECV_M2D_ACK) {
2785#ifdef CONFIG_WPS_UPNP
2786 if (wps->wps->wps_upnp &&
2787 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2788 if (wps->wps->upnp_msgs)
2789 return WPS_CONTINUE;
2790 if (wps->ext_reg == 0)
2791 wps->ext_reg = 1;
2792 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2793 "external Registrar");
2794 return WPS_PENDING;
2795 }
2796#endif /* CONFIG_WPS_UPNP */
2797
2798 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2799 "terminate negotiation");
2800 }
2801
2802 return WPS_FAILURE;
2803}
2804
2805
2806static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2807 const struct wpabuf *msg)
2808{
2809 struct wps_parse_attr attr;
2810 int old_state;
2811 u16 config_error;
2812
2813 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2814
2815 old_state = wps->state;
2816 wps->state = SEND_WSC_NACK;
2817
2818 if (wps_parse_msg(msg, &attr) < 0)
2819 return WPS_FAILURE;
2820
2821 if (attr.msg_type == NULL) {
2822 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2823 return WPS_FAILURE;
2824 }
2825
2826 if (*attr.msg_type != WPS_WSC_NACK) {
2827 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2828 *attr.msg_type);
2829 return WPS_FAILURE;
2830 }
2831
2832#ifdef CONFIG_WPS_UPNP
2833 if (wps->wps->wps_upnp && wps->ext_reg) {
2834 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2835 "Registrar terminated by the Enrollee");
2836 return WPS_FAILURE;
2837 }
2838#endif /* CONFIG_WPS_UPNP */
2839
2840 if (attr.registrar_nonce == NULL ||
2841 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2842 {
2843 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2844 return WPS_FAILURE;
2845 }
2846
2847 if (attr.enrollee_nonce == NULL ||
2848 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2849 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2850 return WPS_FAILURE;
2851 }
2852
2853 if (attr.config_error == NULL) {
2854 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2855 "in WSC_NACK");
2856 return WPS_FAILURE;
2857 }
2858
2859 config_error = WPA_GET_BE16(attr.config_error);
2860 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2861 "Configuration Error %d", config_error);
2862
2863 switch (old_state) {
2864 case RECV_M3:
2865 wps_fail_event(wps->wps, WPS_M2, config_error,
2866 wps->error_indication);
2867 break;
2868 case RECV_M5:
2869 wps_fail_event(wps->wps, WPS_M4, config_error,
2870 wps->error_indication);
2871 break;
2872 case RECV_M7:
2873 wps_fail_event(wps->wps, WPS_M6, config_error,
2874 wps->error_indication);
2875 break;
2876 case RECV_DONE:
2877 wps_fail_event(wps->wps, WPS_M8, config_error,
2878 wps->error_indication);
2879 break;
2880 default:
2881 break;
2882 }
2883
2884 return WPS_FAILURE;
2885}
2886
2887
2888static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2889 const struct wpabuf *msg)
2890{
2891 struct wps_parse_attr attr;
2892
2893 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2894
2895 if (wps->state != RECV_DONE &&
2896 (!wps->wps->wps_upnp || !wps->ext_reg)) {
2897 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2898 "receiving WSC_Done", wps->state);
2899 return WPS_FAILURE;
2900 }
2901
2902 if (wps_parse_msg(msg, &attr) < 0)
2903 return WPS_FAILURE;
2904
2905 if (attr.msg_type == NULL) {
2906 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2907 return WPS_FAILURE;
2908 }
2909
2910 if (*attr.msg_type != WPS_WSC_DONE) {
2911 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2912 *attr.msg_type);
2913 return WPS_FAILURE;
2914 }
2915
2916#ifdef CONFIG_WPS_UPNP
2917 if (wps->wps->wps_upnp && wps->ext_reg) {
2918 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2919 "Registrar completed successfully");
2920 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2921 wps->uuid_e);
2922 return WPS_DONE;
2923 }
2924#endif /* CONFIG_WPS_UPNP */
2925
2926 if (attr.registrar_nonce == NULL ||
2927 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2928 {
2929 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2930 return WPS_FAILURE;
2931 }
2932
2933 if (attr.enrollee_nonce == NULL ||
2934 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2935 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2936 return WPS_FAILURE;
2937 }
2938
2939 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
2940 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2941 wps->uuid_e);
2942
2943 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
2944 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
2945 struct wps_credential cred;
2946
2947 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
2948 "on first Enrollee connection");
2949
2950 os_memset(&cred, 0, sizeof(cred));
2951 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
2952 cred.ssid_len = wps->wps->ssid_len;
2953 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
2954 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
2955 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
2956 cred.key_len = wps->new_psk_len;
2957
2958 wps->wps->wps_state = WPS_STATE_CONFIGURED;
2959 wpa_hexdump_ascii_key(MSG_DEBUG,
2960 "WPS: Generated random passphrase",
2961 wps->new_psk, wps->new_psk_len);
2962 if (wps->wps->cred_cb)
2963 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
2964
2965 os_free(wps->new_psk);
2966 wps->new_psk = NULL;
2967 }
2968
2969 if (!wps->wps->ap && !wps->er)
2970 wps_sta_cred_cb(wps);
2971
2972 if (wps->new_psk) {
2973 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
2974 wps->new_psk, wps->new_psk_len)) {
2975 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
2976 "new PSK");
2977 }
2978 os_free(wps->new_psk);
2979 wps->new_psk = NULL;
2980 }
2981
2982 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
2983
2984 if (wps->pbc) {
2985 wps_registrar_remove_pbc_session(wps->wps->registrar,
2986 wps->uuid_e);
2987 wps_registrar_pbc_completed(wps->wps->registrar);
2988 } else {
2989 wps_registrar_pin_completed(wps->wps->registrar);
2990 }
2991 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
2992 * merge them into APs own list.. */
2993
2994 wps_success_event(wps->wps);
2995
2996 return WPS_DONE;
2997}
2998
2999
3000enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3001 enum wsc_op_code op_code,
3002 const struct wpabuf *msg)
3003{
3004 enum wps_process_res ret;
3005
3006 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3007 "op_code=%d)",
3008 (unsigned long) wpabuf_len(msg), op_code);
3009
3010#ifdef CONFIG_WPS_UPNP
3011 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3012 struct wps_parse_attr attr;
3013 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3014 *attr.msg_type == WPS_M3)
3015 wps->ext_reg = 2; /* past M2/M2D phase */
3016 }
3017 if (wps->ext_reg > 1)
3018 wps_registrar_free_pending_m2(wps->wps);
3019 if (wps->wps->wps_upnp && wps->ext_reg &&
3020 wps->wps->upnp_msgs == NULL &&
3021 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3022 {
3023 struct wps_parse_attr attr;
3024 int type;
3025 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3026 type = -1;
3027 else
3028 type = *attr.msg_type;
3029 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3030 " to external Registrar for processing", type);
3031 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3032 wps->mac_addr_e,
3033 UPNP_WPS_WLANEVENT_TYPE_EAP,
3034 msg);
3035 if (op_code == WSC_MSG)
3036 return WPS_PENDING;
3037 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3038 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3039 "external Registrar");
3040 return WPS_CONTINUE;
3041 }
3042#endif /* CONFIG_WPS_UPNP */
3043
3044 switch (op_code) {
3045 case WSC_MSG:
3046 return wps_process_wsc_msg(wps, msg);
3047 case WSC_ACK:
3048 if (wps_validate_wsc_ack(msg) < 0)
3049 return WPS_FAILURE;
3050 return wps_process_wsc_ack(wps, msg);
3051 case WSC_NACK:
3052 if (wps_validate_wsc_nack(msg) < 0)
3053 return WPS_FAILURE;
3054 return wps_process_wsc_nack(wps, msg);
3055 case WSC_Done:
3056 if (wps_validate_wsc_done(msg) < 0)
3057 return WPS_FAILURE;
3058 ret = wps_process_wsc_done(wps, msg);
3059 if (ret == WPS_FAILURE) {
3060 wps->state = SEND_WSC_NACK;
3061 wps_fail_event(wps->wps, WPS_WSC_DONE,
3062 wps->config_error,
3063 wps->error_indication);
3064 }
3065 return ret;
3066 default:
3067 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3068 return WPS_FAILURE;
3069 }
3070}
3071
3072
3073int wps_registrar_update_ie(struct wps_registrar *reg)
3074{
3075 return wps_set_ie(reg);
3076}
3077
3078
3079static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3080 void *timeout_ctx)
3081{
3082 struct wps_registrar *reg = eloop_ctx;
3083
3084 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3085 "unselect internal Registrar");
3086 reg->selected_registrar = 0;
3087 reg->pbc = 0;
3088 wps_registrar_selected_registrar_changed(reg);
3089}
3090
3091
3092#ifdef CONFIG_WPS_UPNP
3093static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3094 struct subscription *s)
3095{
3096 int i, j;
3097 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3098 "config_methods=0x%x)",
3099 s->dev_password_id, s->config_methods);
3100 reg->sel_reg_union = 1;
3101 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3102 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3103 if (reg->sel_reg_config_methods_override == -1)
3104 reg->sel_reg_config_methods_override = 0;
3105 reg->sel_reg_config_methods_override |= s->config_methods;
3106 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3107 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3108 break;
3109 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3110 j++) {
3111 if (is_zero_ether_addr(s->authorized_macs[j]))
3112 break;
3113 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3114 MACSTR, MAC2STR(s->authorized_macs[j]));
3115 os_memcpy(reg->authorized_macs_union[i],
3116 s->authorized_macs[j], ETH_ALEN);
3117 i++;
3118 }
3119 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3120 (u8 *) reg->authorized_macs_union,
3121 sizeof(reg->authorized_macs_union));
3122}
3123#endif /* CONFIG_WPS_UPNP */
3124
3125
3126static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3127{
3128#ifdef CONFIG_WPS_UPNP
3129 struct subscription *s;
3130
3131 if (reg->wps->wps_upnp == NULL)
3132 return;
3133
3134 dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3135 struct subscription, list) {
3136 struct subscr_addr *sa;
3137 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3138 if (sa) {
3139 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3140 inet_ntoa(sa->saddr.sin_addr),
3141 ntohs(sa->saddr.sin_port));
3142 }
3143 if (s->selected_registrar)
3144 wps_registrar_sel_reg_add(reg, s);
3145 else
3146 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3147 "selected");
3148 }
3149#endif /* CONFIG_WPS_UPNP */
3150}
3151
3152
3153/**
3154 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3155 * @reg: Registrar data from wps_registrar_init()
3156 *
3157 * This function is called when selected registrar state changes, e.g., when an
3158 * AP receives a SetSelectedRegistrar UPnP message.
3159 */
3160void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3161{
3162 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3163
3164 reg->sel_reg_union = reg->selected_registrar;
3165 reg->sel_reg_dev_password_id_override = -1;
3166 reg->sel_reg_config_methods_override = -1;
3167 os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3168 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3169 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3170 (u8 *) reg->authorized_macs_union,
3171 sizeof(reg->authorized_macs_union));
3172 if (reg->selected_registrar) {
3173 u16 methods;
3174
3175 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3176#ifdef CONFIG_WPS2
3177 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3178 WPS_CONFIG_PHY_PUSHBUTTON);
3179#endif /* CONFIG_WPS2 */
3180 if (reg->pbc) {
3181 reg->sel_reg_dev_password_id_override =
3182 DEV_PW_PUSHBUTTON;
3183 wps_set_pushbutton(&methods, reg->wps->config_methods);
3184 }
3185 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3186 "(pbc=%d)", reg->pbc);
3187 reg->sel_reg_config_methods_override = methods;
3188 } else
3189 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3190
3191 wps_registrar_sel_reg_union(reg);
3192
3193 wps_set_ie(reg);
3194 wps_cb_set_sel_reg(reg);
3195}
3196
3197
3198int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3199 char *buf, size_t buflen)
3200{
3201 struct wps_registrar_device *d;
3202 int len = 0, ret;
3203 char uuid[40];
3204 char devtype[WPS_DEV_TYPE_BUFSIZE];
3205
3206 d = wps_device_get(reg, addr);
3207 if (d == NULL)
3208 return 0;
3209 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3210 return 0;
3211
3212 ret = os_snprintf(buf + len, buflen - len,
3213 "wpsUuid=%s\n"
3214 "wpsPrimaryDeviceType=%s\n"
3215 "wpsDeviceName=%s\n"
3216 "wpsManufacturer=%s\n"
3217 "wpsModelName=%s\n"
3218 "wpsModelNumber=%s\n"
3219 "wpsSerialNumber=%s\n",
3220 uuid,
3221 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3222 sizeof(devtype)),
3223 d->dev.device_name ? d->dev.device_name : "",
3224 d->dev.manufacturer ? d->dev.manufacturer : "",
3225 d->dev.model_name ? d->dev.model_name : "",
3226 d->dev.model_number ? d->dev.model_number : "",
3227 d->dev.serial_number ? d->dev.serial_number : "");
3228 if (ret < 0 || (size_t) ret >= buflen - len)
3229 return len;
3230 len += ret;
3231
3232 return len;
3233}
3234
3235
3236int wps_registrar_config_ap(struct wps_registrar *reg,
3237 struct wps_credential *cred)
3238{
3239#ifdef CONFIG_WPS2
3240 printf("encr_type=0x%x\n", cred->encr_type);
3241 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3242 WPS_ENCR_AES))) {
3243 if (cred->encr_type & WPS_ENCR_WEP) {
3244 wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3245 "due to WEP configuration");
3246 return -1;
3247 }
3248
3249 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3250 "invalid encr_type 0x%x", cred->encr_type);
3251 return -1;
3252 }
3253
3254 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3255 WPS_ENCR_TKIP) {
3256 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3257 "TKIP+AES");
3258 cred->encr_type |= WPS_ENCR_AES;
3259 }
3260
3261 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3262 WPS_AUTH_WPAPSK) {
3263 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3264 "WPAPSK+WPA2PSK");
3265 cred->auth_type |= WPS_AUTH_WPA2PSK;
3266 }
3267#endif /* CONFIG_WPS2 */
3268
3269 if (reg->wps->cred_cb)
3270 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3271
3272 return -1;
3273}