Gitiles
Code Review Sign In
gerrit.omnirom.org / android_external_wpa_supplicant_8 / 1f69aa52ea2e0a73ac502565df8c666ee49cab6a / . / src / wps / wps_registrar.c
blob: eda1c70768f4337c2a933f293d6bf21a9511595c [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,
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]313 const u8 *uuid_e,
314 const u8 *p2p_dev_addr)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]315{
316 struct wps_pbc_session *pbc, *prev = NULL, *tmp;
317
318 pbc = reg->pbc_sessions;
319 while (pbc) {
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]320 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
321 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
322 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
323 0)) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]324 if (prev)
325 prev->next = pbc->next;
326 else
327 reg->pbc_sessions = pbc->next;
328 tmp = pbc;
329 pbc = pbc->next;
330 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
331 "addr=" MACSTR, MAC2STR(tmp->addr));
332 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
333 tmp->uuid_e, WPS_UUID_LEN);
334 os_free(tmp);
335 continue;
336 }
337 prev = pbc;
338 pbc = pbc->next;
339 }
340}
341
342
343int wps_registrar_pbc_overlap(struct wps_registrar *reg,
344 const u8 *addr, const u8 *uuid_e)
345{
346 int count = 0;
347 struct wps_pbc_session *pbc;
348 struct wps_pbc_session *first = NULL;
349 struct os_time now;
350
351 os_get_time(&now);
352
353 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
354
355 if (uuid_e) {
356 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
357 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
358 uuid_e, WPS_UUID_LEN);
359 count++;
360 }
361
362 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
363 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
364 MAC2STR(pbc->addr));
365 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
366 pbc->uuid_e, WPS_UUID_LEN);
367 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
368 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has "
369 "expired");
370 break;
371 }
372 if (first &&
373 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
374 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
375 continue; /* same Enrollee */
376 }
377 if (uuid_e == NULL ||
378 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
379 wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
380 count++;
381 }
382 if (first == NULL)
383 first = pbc;
384 }
385
386 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
387
388 return count > 1 ? 1 : 0;
389}
390
391
392static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
393{
394 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
395 wps->wps_state);
396 wpabuf_put_be16(msg, ATTR_WPS_STATE);
397 wpabuf_put_be16(msg, 1);
398 wpabuf_put_u8(msg, wps->wps_state);
399 return 0;
400}
401
402
403#ifdef CONFIG_WPS_UPNP
404static void wps_registrar_free_pending_m2(struct wps_context *wps)
405{
406 struct upnp_pending_message *p, *p2, *prev = NULL;
407 p = wps->upnp_msgs;
408 while (p) {
409 if (p->type == WPS_M2 || p->type == WPS_M2D) {
410 if (prev == NULL)
411 wps->upnp_msgs = p->next;
412 else
413 prev->next = p->next;
414 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
415 p2 = p;
416 p = p->next;
417 wpabuf_free(p2->msg);
418 os_free(p2);
419 continue;
420 }
421 prev = p;
422 p = p->next;
423 }
424}
425#endif /* CONFIG_WPS_UPNP */
426
427
428static int wps_build_ap_setup_locked(struct wps_context *wps,
429 struct wpabuf *msg)
430{
431 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
432 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
433 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
434 wpabuf_put_be16(msg, 1);
435 wpabuf_put_u8(msg, 1);
436 }
437 return 0;
438}
439
440
441static int wps_build_selected_registrar(struct wps_registrar *reg,
442 struct wpabuf *msg)
443{
444 if (!reg->sel_reg_union)
445 return 0;
446 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
447 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
448 wpabuf_put_be16(msg, 1);
449 wpabuf_put_u8(msg, 1);
450 return 0;
451}
452
453
454static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
455 struct wpabuf *msg)
456{
457 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
458 if (!reg->sel_reg_union)
459 return 0;
460 if (reg->sel_reg_dev_password_id_override >= 0)
461 id = reg->sel_reg_dev_password_id_override;
462 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
463 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
464 wpabuf_put_be16(msg, 2);
465 wpabuf_put_be16(msg, id);
466 return 0;
467}
468
469
470static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
471 struct wpabuf *msg)
472{
473 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
474 if (!reg->sel_reg_union)
475 return 0;
476 if (reg->sel_reg_dev_password_id_override >= 0)
477 id = reg->sel_reg_dev_password_id_override;
478 if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
479 return 0;
480 return wps_build_uuid_e(msg, reg->wps->uuid);
481}
482
483
484static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
485{
486 *methods |= WPS_CONFIG_PUSHBUTTON;
487#ifdef CONFIG_WPS2
488 if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON)
489 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
490 if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON)
491 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]492 if (!(*methods & (WPS_CONFIG_VIRT_PUSHBUTTON |
493 WPS_CONFIG_PHY_PUSHBUTTON))) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]494 /*
495 * Required to include virtual/physical flag, but we were not
496 * configured with push button type, so have to default to one
497 * of them.
498 */
499 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
500 }
501#endif /* CONFIG_WPS2 */
502}
503
504
505static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
506 struct wpabuf *msg)
507{
508 u16 methods;
509 if (!reg->sel_reg_union)
510 return 0;
511 methods = reg->wps->config_methods;
512 methods &= ~WPS_CONFIG_PUSHBUTTON;
513#ifdef CONFIG_WPS2
514 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
515 WPS_CONFIG_PHY_PUSHBUTTON);
516#endif /* CONFIG_WPS2 */
517 if (reg->pbc)
518 wps_set_pushbutton(&methods, reg->wps->config_methods);
519 if (reg->sel_reg_config_methods_override >= 0)
520 methods = reg->sel_reg_config_methods_override;
521 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
522 methods);
523 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
524 wpabuf_put_be16(msg, 2);
525 wpabuf_put_be16(msg, methods);
526 return 0;
527}
528
529
530static int wps_build_probe_config_methods(struct wps_registrar *reg,
531 struct wpabuf *msg)
532{
533 u16 methods;
534 /*
535 * These are the methods that the AP supports as an Enrollee for adding
536 * external Registrars.
537 */
538 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
539#ifdef CONFIG_WPS2
540 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
541 WPS_CONFIG_PHY_PUSHBUTTON);
542#endif /* CONFIG_WPS2 */
543 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
544 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
545 wpabuf_put_be16(msg, 2);
546 wpabuf_put_be16(msg, methods);
547 return 0;
548}
549
550
551static int wps_build_config_methods_r(struct wps_registrar *reg,
552 struct wpabuf *msg)
553{
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]554 return wps_build_config_methods(msg, reg->wps->config_methods);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]555}
556
557
558const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
559{
560 *count = 0;
561
562#ifdef CONFIG_WPS2
563 while (*count < WPS_MAX_AUTHORIZED_MACS) {
564 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
565 break;
566 (*count)++;
567 }
568#endif /* CONFIG_WPS2 */
569
570 return (const u8 *) reg->authorized_macs_union;
571}
572
573
574/**
575 * wps_registrar_init - Initialize WPS Registrar data
576 * @wps: Pointer to longterm WPS context
577 * @cfg: Registrar configuration
578 * Returns: Pointer to allocated Registrar data or %NULL on failure
579 *
580 * This function is used to initialize WPS Registrar functionality. It can be
581 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
582 * runs (e.g., when run as an internal Registrar in an AP). Caller is
583 * responsible for freeing the returned data with wps_registrar_deinit() when
584 * Registrar functionality is not needed anymore.
585 */
586struct wps_registrar *
587wps_registrar_init(struct wps_context *wps,
588 const struct wps_registrar_config *cfg)
589{
590 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
591 if (reg == NULL)
592 return NULL;
593
594 dl_list_init(&reg->pins);
595 reg->wps = wps;
596 reg->new_psk_cb = cfg->new_psk_cb;
597 reg->set_ie_cb = cfg->set_ie_cb;
598 reg->pin_needed_cb = cfg->pin_needed_cb;
599 reg->reg_success_cb = cfg->reg_success_cb;
600 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
601 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
602 reg->cb_ctx = cfg->cb_ctx;
603 reg->skip_cred_build = cfg->skip_cred_build;
604 if (cfg->extra_cred) {
605 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
606 cfg->extra_cred_len);
607 if (reg->extra_cred == NULL) {
608 os_free(reg);
609 return NULL;
610 }
611 }
612 reg->disable_auto_conf = cfg->disable_auto_conf;
613 reg->sel_reg_dev_password_id_override = -1;
614 reg->sel_reg_config_methods_override = -1;
615 reg->static_wep_only = cfg->static_wep_only;
616 reg->dualband = cfg->dualband;
617
618 if (wps_set_ie(reg)) {
619 wps_registrar_deinit(reg);
620 return NULL;
621 }
622
623 return reg;
624}
625
626
627/**
628 * wps_registrar_deinit - Deinitialize WPS Registrar data
629 * @reg: Registrar data from wps_registrar_init()
630 */
631void wps_registrar_deinit(struct wps_registrar *reg)
632{
633 if (reg == NULL)
634 return;
635 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
636 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
637 wps_free_pins(&reg->pins);
638 wps_free_pbc_sessions(reg->pbc_sessions);
639 wpabuf_free(reg->extra_cred);
640 wps_free_devices(reg->devices);
641 os_free(reg);
642}
643
644
645/**
646 * wps_registrar_add_pin - Configure a new PIN for Registrar
647 * @reg: Registrar data from wps_registrar_init()
648 * @addr: Enrollee MAC address or %NULL if not known
649 * @uuid: UUID-E or %NULL for wildcard (any UUID)
650 * @pin: PIN (Device Password)
651 * @pin_len: Length of pin in octets
652 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
653 * Returns: 0 on success, -1 on failure
654 */
655int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
656 const u8 *uuid, const u8 *pin, size_t pin_len,
657 int timeout)
658{
659 struct wps_uuid_pin *p;
660
661 p = os_zalloc(sizeof(*p));
662 if (p == NULL)
663 return -1;
664 if (addr)
665 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
666 if (uuid == NULL)
667 p->wildcard_uuid = 1;
668 else
669 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
670 p->pin = os_malloc(pin_len);
671 if (p->pin == NULL) {
672 os_free(p);
673 return -1;
674 }
675 os_memcpy(p->pin, pin, pin_len);
676 p->pin_len = pin_len;
677
678 if (timeout) {
679 p->flags |= PIN_EXPIRES;
680 os_get_time(&p->expiration);
681 p->expiration.sec += timeout;
682 }
683
684 dl_list_add(&reg->pins, &p->list);
685
686 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
687 timeout);
688 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
689 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
690 reg->selected_registrar = 1;
691 reg->pbc = 0;
692 if (addr)
693 wps_registrar_add_authorized_mac(reg, addr);
694 else
695 wps_registrar_add_authorized_mac(
696 reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
697 wps_registrar_selected_registrar_changed(reg);
698 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
699 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
700 wps_registrar_set_selected_timeout,
701 reg, NULL);
702
703 return 0;
704}
705
706
707static void wps_registrar_remove_pin(struct wps_registrar *reg,
708 struct wps_uuid_pin *pin)
709{
710 u8 *addr;
711 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
712
713 if (is_zero_ether_addr(pin->enrollee_addr))
714 addr = bcast;
715 else
716 addr = pin->enrollee_addr;
717 wps_registrar_remove_authorized_mac(reg, addr);
718 wps_remove_pin(pin);
719 wps_registrar_selected_registrar_changed(reg);
720}
721
722
723static void wps_registrar_expire_pins(struct wps_registrar *reg)
724{
725 struct wps_uuid_pin *pin, *prev;
726 struct os_time now;
727
728 os_get_time(&now);
729 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
730 {
731 if ((pin->flags & PIN_EXPIRES) &&
732 os_time_before(&pin->expiration, &now)) {
733 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
734 pin->uuid, WPS_UUID_LEN);
735 wps_registrar_remove_pin(reg, pin);
736 }
737 }
738}
739
740
741/**
742 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
743 * @reg: Registrar data from wps_registrar_init()
744 * Returns: 0 on success, -1 if not wildcard PIN is enabled
745 */
746static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg)
747{
748 struct wps_uuid_pin *pin, *prev;
749
750 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
751 {
752 if (pin->wildcard_uuid) {
753 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
754 pin->uuid, WPS_UUID_LEN);
755 wps_registrar_remove_pin(reg, pin);
756 return 0;
757 }
758 }
759
760 return -1;
761}
762
763
764/**
765 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
766 * @reg: Registrar data from wps_registrar_init()
767 * @uuid: UUID-E
768 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
769 */
770int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
771{
772 struct wps_uuid_pin *pin, *prev;
773
774 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
775 {
776 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
777 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
778 pin->uuid, WPS_UUID_LEN);
779 wps_registrar_remove_pin(reg, pin);
780 return 0;
781 }
782 }
783
784 return -1;
785}
786
787
788static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
789 const u8 *uuid, size_t *pin_len)
790{
791 struct wps_uuid_pin *pin, *found = NULL;
792
793 wps_registrar_expire_pins(reg);
794
795 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
796 if (!pin->wildcard_uuid &&
797 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
798 found = pin;
799 break;
800 }
801 }
802
803 if (!found) {
804 /* Check for wildcard UUIDs since none of the UUID-specific
805 * PINs matched */
806 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
807 if (pin->wildcard_uuid == 1) {
808 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
809 "PIN. Assigned it for this UUID-E");
810 pin->wildcard_uuid = 2;
811 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
812 found = pin;
813 break;
814 }
815 }
816 }
817
818 if (!found)
819 return NULL;
820
821 /*
822 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
823 * that could otherwise avoid PIN invalidations.
824 */
825 if (found->flags & PIN_LOCKED) {
826 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
827 "allow concurrent re-use");
828 return NULL;
829 }
830 *pin_len = found->pin_len;
831 found->flags |= PIN_LOCKED;
832 return found->pin;
833}
834
835
836/**
837 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
838 * @reg: Registrar data from wps_registrar_init()
839 * @uuid: UUID-E
840 * Returns: 0 on success, -1 on failure
841 *
842 * PINs are locked to enforce only one concurrent use. This function unlocks a
843 * PIN to allow it to be used again. If the specified PIN was configured using
844 * a wildcard UUID, it will be removed instead of allowing multiple uses.
845 */
846int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
847{
848 struct wps_uuid_pin *pin;
849
850 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
851 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
852 if (pin->wildcard_uuid == 2) {
853 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
854 "wildcard PIN");
855 return wps_registrar_invalidate_pin(reg, uuid);
856 }
857 pin->flags &= ~PIN_LOCKED;
858 return 0;
859 }
860 }
861
862 return -1;
863}
864
865
866static void wps_registrar_stop_pbc(struct wps_registrar *reg)
867{
868 reg->selected_registrar = 0;
869 reg->pbc = 0;
870 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
871 wps_registrar_remove_authorized_mac(reg,
872 (u8 *) "\xff\xff\xff\xff\xff\xff");
873 wps_registrar_selected_registrar_changed(reg);
874}
875
876
877static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
878{
879 struct wps_registrar *reg = eloop_ctx;
880
881 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
882 wps_pbc_timeout_event(reg->wps);
883 wps_registrar_stop_pbc(reg);
884}
885
886
887/**
888 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
889 * @reg: Registrar data from wps_registrar_init()
890 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
891 * indicates no such filtering
892 * Returns: 0 on success, -1 on failure, -2 on session overlap
893 *
894 * This function is called on an AP when a push button is pushed to activate
895 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
896 * or when a PBC registration is completed. If more than one Enrollee in active
897 * PBC mode has been detected during the monitor time (previous 2 minutes), the
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]898 * PBC mode is not activated and -2 is returned to indicate session overlap.
899 * This is skipped if a specific Enrollee is selected.
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]900 */
901int wps_registrar_button_pushed(struct wps_registrar *reg,
902 const u8 *p2p_dev_addr)
903{
904 if (p2p_dev_addr == NULL &&
905 wps_registrar_pbc_overlap(reg, NULL, NULL)) {
906 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
907 "mode");
908 wps_pbc_overlap_event(reg->wps);
909 return -2;
910 }
911 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
912 reg->force_pbc_overlap = 0;
913 reg->selected_registrar = 1;
914 reg->pbc = 1;
915 if (p2p_dev_addr)
916 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
917 else
918 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
919 wps_registrar_add_authorized_mac(reg,
920 (u8 *) "\xff\xff\xff\xff\xff\xff");
921 wps_registrar_selected_registrar_changed(reg);
922
923 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
924 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
925 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
926 reg, NULL);
927 return 0;
928}
929
930
931static void wps_registrar_pbc_completed(struct wps_registrar *reg)
932{
933 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
934 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
935 wps_registrar_stop_pbc(reg);
936}
937
938
939static void wps_registrar_pin_completed(struct wps_registrar *reg)
940{
941 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
942 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
943 reg->selected_registrar = 0;
944 wps_registrar_selected_registrar_changed(reg);
945}
946
947
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]948void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e)
949{
950 if (registrar->pbc) {
951 wps_registrar_remove_pbc_session(registrar,
952 uuid_e, NULL);
953 wps_registrar_pbc_completed(registrar);
954 } else {
955 wps_registrar_pin_completed(registrar);
956 }
957}
958
959
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]960int wps_registrar_wps_cancel(struct wps_registrar *reg)
961{
962 if (reg->pbc) {
963 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
964 wps_registrar_pbc_timeout(reg, NULL);
965 return 1;
966 } else if (reg->selected_registrar) {
967 /* PIN Method */
968 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
969 wps_registrar_pin_completed(reg);
970 wps_registrar_invalidate_wildcard_pin(reg);
971 return 1;
972 }
973 return 0;
974}
975
976
977/**
978 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
979 * @reg: Registrar data from wps_registrar_init()
980 * @addr: MAC address of the Probe Request sender
981 * @wps_data: WPS IE contents
982 *
983 * This function is called on an AP when a Probe Request with WPS IE is
984 * received. This is used to track PBC mode use and to detect possible overlap
985 * situation with other WPS APs.
986 */
987void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
988 const struct wpabuf *wps_data,
989 int p2p_wildcard)
990{
991 struct wps_parse_attr attr;
992
993 wpa_hexdump_buf(MSG_MSGDUMP,
994 "WPS: Probe Request with WPS data received",
995 wps_data);
996
997 if (wps_parse_msg(wps_data, &attr) < 0)
998 return;
999
1000 if (attr.config_methods == NULL) {
1001 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1002 "Probe Request");
1003 return;
1004 }
1005
1006 if (attr.dev_password_id == NULL) {
1007 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1008 "in Probe Request");
1009 return;
1010 }
1011
1012 if (reg->enrollee_seen_cb && attr.uuid_e &&
1013 attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1014 char *dev_name = NULL;
1015 if (attr.dev_name) {
1016 dev_name = os_zalloc(attr.dev_name_len + 1);
1017 if (dev_name) {
1018 os_memcpy(dev_name, attr.dev_name,
1019 attr.dev_name_len);
1020 }
1021 }
1022 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1023 attr.primary_dev_type,
1024 WPA_GET_BE16(attr.config_methods),
1025 WPA_GET_BE16(attr.dev_password_id),
1026 *attr.request_type, dev_name);
1027 os_free(dev_name);
1028 }
1029
1030 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1031 return; /* Not PBC */
1032
1033 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1034 MACSTR, MAC2STR(addr));
1035 if (attr.uuid_e == NULL) {
1036 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1037 "UUID-E included");
1038 return;
1039 }
1040 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1041 WPS_UUID_LEN);
1042
1043 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1044 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1045 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1046 reg->force_pbc_overlap = 1;
1047 wps_pbc_overlap_event(reg->wps);
1048 }
1049}
1050
1051
1052static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1053 const u8 *psk, size_t psk_len)
1054{
1055 if (reg->new_psk_cb == NULL)
1056 return 0;
1057
1058 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1059}
1060
1061
1062static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1063 const struct wps_device_data *dev)
1064{
1065 if (reg->pin_needed_cb == NULL)
1066 return;
1067
1068 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1069}
1070
1071
1072static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1073 const u8 *uuid_e)
1074{
1075 if (reg->reg_success_cb == NULL)
1076 return;
1077
1078 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
1079}
1080
1081
1082static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1083 struct wpabuf *probe_resp_ie)
1084{
1085 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1086}
1087
1088
1089static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1090{
1091 u16 methods = 0;
1092 if (reg->set_sel_reg_cb == NULL)
1093 return;
1094
1095 if (reg->selected_registrar) {
1096 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1097#ifdef CONFIG_WPS2
1098 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1099 WPS_CONFIG_PHY_PUSHBUTTON);
1100#endif /* CONFIG_WPS2 */
1101 if (reg->pbc)
1102 wps_set_pushbutton(&methods, reg->wps->config_methods);
1103 }
1104
1105 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1106 "config_methods=0x%x pbc=%d methods=0x%x",
1107 reg->selected_registrar, reg->wps->config_methods,
1108 reg->pbc, methods);
1109
1110 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1111 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1112 methods);
1113}
1114
1115
1116static int wps_set_ie(struct wps_registrar *reg)
1117{
1118 struct wpabuf *beacon;
1119 struct wpabuf *probe;
1120 const u8 *auth_macs;
1121 size_t count;
1122 size_t vendor_len = 0;
1123 int i;
1124
1125 if (reg->set_ie_cb == NULL)
1126 return 0;
1127
1128 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1129 if (reg->wps->dev.vendor_ext[i]) {
1130 vendor_len += 2 + 2;
1131 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1132 }
1133 }
1134
1135 beacon = wpabuf_alloc(400 + vendor_len);
1136 if (beacon == NULL)
1137 return -1;
1138 probe = wpabuf_alloc(500 + vendor_len);
1139 if (probe == NULL) {
1140 wpabuf_free(beacon);
1141 return -1;
1142 }
1143
1144 auth_macs = wps_authorized_macs(reg, &count);
1145
1146 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1147
1148 if (wps_build_version(beacon) ||
1149 wps_build_wps_state(reg->wps, beacon) ||
1150 wps_build_ap_setup_locked(reg->wps, beacon) ||
1151 wps_build_selected_registrar(reg, beacon) ||
1152 wps_build_sel_reg_dev_password_id(reg, beacon) ||
1153 wps_build_sel_reg_config_methods(reg, beacon) ||
1154 wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1155 (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1156 wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1157 wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1158 wpabuf_free(beacon);
1159 wpabuf_free(probe);
1160 return -1;
1161 }
1162
1163#ifdef CONFIG_P2P
1164 if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1165 wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1166 wpabuf_free(beacon);
1167 wpabuf_free(probe);
1168 return -1;
1169 }
1170#endif /* CONFIG_P2P */
1171
1172 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1173
1174 if (wps_build_version(probe) ||
1175 wps_build_wps_state(reg->wps, probe) ||
1176 wps_build_ap_setup_locked(reg->wps, probe) ||
1177 wps_build_selected_registrar(reg, probe) ||
1178 wps_build_sel_reg_dev_password_id(reg, probe) ||
1179 wps_build_sel_reg_config_methods(reg, probe) ||
1180 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1181 WPS_RESP_REGISTRAR) ||
1182 wps_build_uuid_e(probe, reg->wps->uuid) ||
1183 wps_build_device_attrs(&reg->wps->dev, probe) ||
1184 wps_build_probe_config_methods(reg, probe) ||
1185 wps_build_rf_bands(&reg->wps->dev, probe) ||
1186 wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1187 wps_build_vendor_ext(&reg->wps->dev, probe)) {
1188 wpabuf_free(beacon);
1189 wpabuf_free(probe);
1190 return -1;
1191 }
1192
1193 beacon = wps_ie_encapsulate(beacon);
1194 probe = wps_ie_encapsulate(probe);
1195
1196 if (!beacon || !probe) {
1197 wpabuf_free(beacon);
1198 wpabuf_free(probe);
1199 return -1;
1200 }
1201
1202 if (reg->static_wep_only) {
1203 /*
1204 * Windows XP and Vista clients can get confused about
1205 * EAP-Identity/Request when they probe the network with
1206 * EAPOL-Start. In such a case, they may assume the network is
1207 * using IEEE 802.1X and prompt user for a certificate while
1208 * the correct (non-WPS) behavior would be to ask for the
1209 * static WEP key. As a workaround, use Microsoft Provisioning
1210 * IE to advertise that legacy 802.1X is not supported.
1211 */
1212 const u8 ms_wps[7] = {
1213 WLAN_EID_VENDOR_SPECIFIC, 5,
1214 /* Microsoft Provisioning IE (00:50:f2:5) */
1215 0x00, 0x50, 0xf2, 5,
1216 0x00 /* no legacy 802.1X or MS WPS */
1217 };
1218 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1219 "into Beacon/Probe Response frames");
1220 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1221 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1222 }
1223
1224 return wps_cb_set_ie(reg, beacon, probe);
1225}
1226
1227
1228static int wps_get_dev_password(struct wps_data *wps)
1229{
1230 const u8 *pin;
1231 size_t pin_len = 0;
1232
1233 os_free(wps->dev_password);
1234 wps->dev_password = NULL;
1235
1236 if (wps->pbc) {
1237 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1238 pin = (const u8 *) "00000000";
1239 pin_len = 8;
1240 } else {
1241 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1242 &pin_len);
1243 }
1244 if (pin == NULL) {
1245 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1246 "the Enrollee");
1247 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1248 &wps->peer_dev);
1249 return -1;
1250 }
1251
1252 wps->dev_password = os_malloc(pin_len);
1253 if (wps->dev_password == NULL)
1254 return -1;
1255 os_memcpy(wps->dev_password, pin, pin_len);
1256 wps->dev_password_len = pin_len;
1257
1258 return 0;
1259}
1260
1261
1262static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1263{
1264 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1265 wpabuf_put_be16(msg, ATTR_UUID_R);
1266 wpabuf_put_be16(msg, WPS_UUID_LEN);
1267 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1268 return 0;
1269}
1270
1271
1272static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1273{
1274 u8 *hash;
1275 const u8 *addr[4];
1276 size_t len[4];
1277
1278 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1279 return -1;
1280 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1281 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1282 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1283
1284 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1285 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1286 "R-Hash derivation");
1287 return -1;
1288 }
1289
1290 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1291 wpabuf_put_be16(msg, ATTR_R_HASH1);
1292 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1293 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1294 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1295 addr[0] = wps->snonce;
1296 len[0] = WPS_SECRET_NONCE_LEN;
1297 addr[1] = wps->psk1;
1298 len[1] = WPS_PSK_LEN;
1299 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1300 len[2] = wpabuf_len(wps->dh_pubkey_e);
1301 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1302 len[3] = wpabuf_len(wps->dh_pubkey_r);
1303 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1304 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1305
1306 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1307 wpabuf_put_be16(msg, ATTR_R_HASH2);
1308 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1309 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1310 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1311 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1312 addr[1] = wps->psk2;
1313 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1314 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1315
1316 return 0;
1317}
1318
1319
1320static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1321{
1322 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1323 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1324 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1325 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1326 return 0;
1327}
1328
1329
1330static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1331{
1332 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1333 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1334 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1335 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1336 WPS_SECRET_NONCE_LEN);
1337 return 0;
1338}
1339
1340
1341static int wps_build_cred_network_idx(struct wpabuf *msg,
1342 const struct wps_credential *cred)
1343{
1344 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1345 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1346 wpabuf_put_be16(msg, 1);
1347 wpabuf_put_u8(msg, 1);
1348 return 0;
1349}
1350
1351
1352static int wps_build_cred_ssid(struct wpabuf *msg,
1353 const struct wps_credential *cred)
1354{
1355 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1356 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1357 cred->ssid, cred->ssid_len);
1358 wpabuf_put_be16(msg, ATTR_SSID);
1359 wpabuf_put_be16(msg, cred->ssid_len);
1360 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1361 return 0;
1362}
1363
1364
1365static int wps_build_cred_auth_type(struct wpabuf *msg,
1366 const struct wps_credential *cred)
1367{
1368 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1369 cred->auth_type);
1370 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1371 wpabuf_put_be16(msg, 2);
1372 wpabuf_put_be16(msg, cred->auth_type);
1373 return 0;
1374}
1375
1376
1377static int wps_build_cred_encr_type(struct wpabuf *msg,
1378 const struct wps_credential *cred)
1379{
1380 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1381 cred->encr_type);
1382 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1383 wpabuf_put_be16(msg, 2);
1384 wpabuf_put_be16(msg, cred->encr_type);
1385 return 0;
1386}
1387
1388
1389static int wps_build_cred_network_key(struct wpabuf *msg,
1390 const struct wps_credential *cred)
1391{
1392 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1393 (int) cred->key_len);
1394 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1395 cred->key, cred->key_len);
1396 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1397 wpabuf_put_be16(msg, cred->key_len);
1398 wpabuf_put_data(msg, cred->key, cred->key_len);
1399 return 0;
1400}
1401
1402
1403static int wps_build_cred_mac_addr(struct wpabuf *msg,
1404 const struct wps_credential *cred)
1405{
1406 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")",
1407 MAC2STR(cred->mac_addr));
1408 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1409 wpabuf_put_be16(msg, ETH_ALEN);
1410 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1411 return 0;
1412}
1413
1414
1415static int wps_build_credential(struct wpabuf *msg,
1416 const struct wps_credential *cred)
1417{
1418 if (wps_build_cred_network_idx(msg, cred) ||
1419 wps_build_cred_ssid(msg, cred) ||
1420 wps_build_cred_auth_type(msg, cred) ||
1421 wps_build_cred_encr_type(msg, cred) ||
1422 wps_build_cred_network_key(msg, cred) ||
1423 wps_build_cred_mac_addr(msg, cred))
1424 return -1;
1425 return 0;
1426}
1427
1428
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]1429int wps_build_credential_wrap(struct wpabuf *msg,
1430 const struct wps_credential *cred)
1431{
1432 struct wpabuf *wbuf;
1433 wbuf = wpabuf_alloc(200);
1434 if (wbuf == NULL)
1435 return -1;
1436 if (wps_build_credential(wbuf, cred)) {
1437 wpabuf_free(wbuf);
1438 return -1;
1439 }
1440 wpabuf_put_be16(msg, ATTR_CRED);
1441 wpabuf_put_be16(msg, wpabuf_len(wbuf));
1442 wpabuf_put_buf(msg, wbuf);
1443 wpabuf_free(wbuf);
1444 return 0;
1445}
1446
1447
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]1448int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1449{
1450 struct wpabuf *cred;
1451
1452 if (wps->wps->registrar->skip_cred_build)
1453 goto skip_cred_build;
1454
1455 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1456 if (wps->use_cred) {
1457 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1458 goto use_provided;
1459 }
1460 os_memset(&wps->cred, 0, sizeof(wps->cred));
1461
1462 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1463 wps->cred.ssid_len = wps->wps->ssid_len;
1464
1465 /* Select the best authentication and encryption type */
1466 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1467 wps->auth_type = WPS_AUTH_WPA2PSK;
1468 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1469 wps->auth_type = WPS_AUTH_WPAPSK;
1470 else if (wps->auth_type & WPS_AUTH_OPEN)
1471 wps->auth_type = WPS_AUTH_OPEN;
1472 else if (wps->auth_type & WPS_AUTH_SHARED)
1473 wps->auth_type = WPS_AUTH_SHARED;
1474 else {
1475 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1476 wps->auth_type);
1477 return -1;
1478 }
1479 wps->cred.auth_type = wps->auth_type;
1480
1481 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1482 wps->auth_type == WPS_AUTH_WPAPSK) {
1483 if (wps->encr_type & WPS_ENCR_AES)
1484 wps->encr_type = WPS_ENCR_AES;
1485 else if (wps->encr_type & WPS_ENCR_TKIP)
1486 wps->encr_type = WPS_ENCR_TKIP;
1487 else {
1488 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1489 "type for WPA/WPA2");
1490 return -1;
1491 }
1492 } else {
1493 if (wps->encr_type & WPS_ENCR_WEP)
1494 wps->encr_type = WPS_ENCR_WEP;
1495 else if (wps->encr_type & WPS_ENCR_NONE)
1496 wps->encr_type = WPS_ENCR_NONE;
1497 else {
1498 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1499 "type for non-WPA/WPA2 mode");
1500 return -1;
1501 }
1502 }
1503 wps->cred.encr_type = wps->encr_type;
1504 /*
1505 * Set MAC address in the Credential to be the Enrollee's MAC address
1506 */
1507 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1508
1509 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1510 !wps->wps->registrar->disable_auto_conf) {
1511 u8 r[16];
1512 /* Generate a random passphrase */
1513 if (random_get_bytes(r, sizeof(r)) < 0)
1514 return -1;
1515 os_free(wps->new_psk);
1516 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1517 if (wps->new_psk == NULL)
1518 return -1;
1519 wps->new_psk_len--; /* remove newline */
1520 while (wps->new_psk_len &&
1521 wps->new_psk[wps->new_psk_len - 1] == '=')
1522 wps->new_psk_len--;
1523 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1524 wps->new_psk, wps->new_psk_len);
1525 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1526 wps->cred.key_len = wps->new_psk_len;
1527 } else if (wps->use_psk_key && wps->wps->psk_set) {
1528 char hex[65];
1529 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1530 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1531 os_memcpy(wps->cred.key, hex, 32 * 2);
1532 wps->cred.key_len = 32 * 2;
1533 } else if (wps->wps->network_key) {
1534 os_memcpy(wps->cred.key, wps->wps->network_key,
1535 wps->wps->network_key_len);
1536 wps->cred.key_len = wps->wps->network_key_len;
1537 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1538 char hex[65];
1539 /* Generate a random per-device PSK */
1540 os_free(wps->new_psk);
1541 wps->new_psk_len = 32;
1542 wps->new_psk = os_malloc(wps->new_psk_len);
1543 if (wps->new_psk == NULL)
1544 return -1;
1545 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1546 os_free(wps->new_psk);
1547 wps->new_psk = NULL;
1548 return -1;
1549 }
1550 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1551 wps->new_psk, wps->new_psk_len);
1552 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1553 wps->new_psk_len);
1554 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1555 wps->cred.key_len = wps->new_psk_len * 2;
1556 }
1557
1558use_provided:
1559#ifdef CONFIG_WPS_TESTING
1560 if (wps_testing_dummy_cred)
1561 cred = wpabuf_alloc(200);
1562 else
1563 cred = NULL;
1564 if (cred) {
1565 struct wps_credential dummy;
1566 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1567 os_memset(&dummy, 0, sizeof(dummy));
1568 os_memcpy(dummy.ssid, "dummy", 5);
1569 dummy.ssid_len = 5;
1570 dummy.auth_type = WPS_AUTH_WPA2PSK;
1571 dummy.encr_type = WPS_ENCR_AES;
1572 os_memcpy(dummy.key, "dummy psk", 9);
1573 dummy.key_len = 9;
1574 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1575 wps_build_credential(cred, &dummy);
1576 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1577
1578 wpabuf_put_be16(msg, ATTR_CRED);
1579 wpabuf_put_be16(msg, wpabuf_len(cred));
1580 wpabuf_put_buf(msg, cred);
1581
1582 wpabuf_free(cred);
1583 }
1584#endif /* CONFIG_WPS_TESTING */
1585
1586 cred = wpabuf_alloc(200);
1587 if (cred == NULL)
1588 return -1;
1589
1590 if (wps_build_credential(cred, &wps->cred)) {
1591 wpabuf_free(cred);
1592 return -1;
1593 }
1594
1595 wpabuf_put_be16(msg, ATTR_CRED);
1596 wpabuf_put_be16(msg, wpabuf_len(cred));
1597 wpabuf_put_buf(msg, cred);
1598 wpabuf_free(cred);
1599
1600skip_cred_build:
1601 if (wps->wps->registrar->extra_cred) {
1602 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1603 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1604 }
1605
1606 return 0;
1607}
1608
1609
1610static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1611{
1612 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1613
1614 if (wps_build_credential(msg, &wps->cred))
1615 return -1;
1616
1617 return 0;
1618}
1619
1620
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]1621static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1622{
1623 struct wpabuf *msg, *plain;
1624
1625 msg = wpabuf_alloc(1000);
1626 if (msg == NULL)
1627 return NULL;
1628
1629 plain = wpabuf_alloc(200);
1630 if (plain == NULL) {
1631 wpabuf_free(msg);
1632 return NULL;
1633 }
1634
1635 if (wps_build_ap_settings(wps, plain)) {
1636 wpabuf_free(plain);
1637 wpabuf_free(msg);
1638 return NULL;
1639 }
1640
1641 wpabuf_put_be16(msg, ATTR_CRED);
1642 wpabuf_put_be16(msg, wpabuf_len(plain));
1643 wpabuf_put_buf(msg, plain);
1644 wpabuf_free(plain);
1645
1646 return msg;
1647}
1648
1649
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]1650static struct wpabuf * wps_build_m2(struct wps_data *wps)
1651{
1652 struct wpabuf *msg;
1653
1654 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1655 return NULL;
1656 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1657 wps->nonce_r, WPS_NONCE_LEN);
1658 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1659
1660 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1661 msg = wpabuf_alloc(1000);
1662 if (msg == NULL)
1663 return NULL;
1664
1665 if (wps_build_version(msg) ||
1666 wps_build_msg_type(msg, WPS_M2) ||
1667 wps_build_enrollee_nonce(wps, msg) ||
1668 wps_build_registrar_nonce(wps, msg) ||
1669 wps_build_uuid_r(wps, msg) ||
1670 wps_build_public_key(wps, msg) ||
1671 wps_derive_keys(wps) ||
1672 wps_build_auth_type_flags(wps, msg) ||
1673 wps_build_encr_type_flags(wps, msg) ||
1674 wps_build_conn_type_flags(wps, msg) ||
1675 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1676 wps_build_device_attrs(&wps->wps->dev, msg) ||
1677 wps_build_rf_bands(&wps->wps->dev, msg) ||
1678 wps_build_assoc_state(wps, msg) ||
1679 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1680 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1681 wps_build_os_version(&wps->wps->dev, msg) ||
1682 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1683 wps_build_authenticator(wps, msg)) {
1684 wpabuf_free(msg);
1685 return NULL;
1686 }
1687
1688 wps->int_reg = 1;
1689 wps->state = RECV_M3;
1690 return msg;
1691}
1692
1693
1694static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1695{
1696 struct wpabuf *msg;
1697 u16 err = wps->config_error;
1698
1699 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1700 msg = wpabuf_alloc(1000);
1701 if (msg == NULL)
1702 return NULL;
1703
1704 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1705 err == WPS_CFG_NO_ERROR)
1706 err = WPS_CFG_SETUP_LOCKED;
1707
1708 if (wps_build_version(msg) ||
1709 wps_build_msg_type(msg, WPS_M2D) ||
1710 wps_build_enrollee_nonce(wps, msg) ||
1711 wps_build_registrar_nonce(wps, msg) ||
1712 wps_build_uuid_r(wps, msg) ||
1713 wps_build_auth_type_flags(wps, msg) ||
1714 wps_build_encr_type_flags(wps, msg) ||
1715 wps_build_conn_type_flags(wps, msg) ||
1716 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1717 wps_build_device_attrs(&wps->wps->dev, msg) ||
1718 wps_build_rf_bands(&wps->wps->dev, msg) ||
1719 wps_build_assoc_state(wps, msg) ||
1720 wps_build_config_error(msg, err) ||
1721 wps_build_os_version(&wps->wps->dev, msg) ||
1722 wps_build_wfa_ext(msg, 0, NULL, 0)) {
1723 wpabuf_free(msg);
1724 return NULL;
1725 }
1726
1727 wps->state = RECV_M2D_ACK;
1728 return msg;
1729}
1730
1731
1732static struct wpabuf * wps_build_m4(struct wps_data *wps)
1733{
1734 struct wpabuf *msg, *plain;
1735
1736 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1737
1738 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1739
1740 plain = wpabuf_alloc(200);
1741 if (plain == NULL)
1742 return NULL;
1743
1744 msg = wpabuf_alloc(1000);
1745 if (msg == NULL) {
1746 wpabuf_free(plain);
1747 return NULL;
1748 }
1749
1750 if (wps_build_version(msg) ||
1751 wps_build_msg_type(msg, WPS_M4) ||
1752 wps_build_enrollee_nonce(wps, msg) ||
1753 wps_build_r_hash(wps, msg) ||
1754 wps_build_r_snonce1(wps, plain) ||
1755 wps_build_key_wrap_auth(wps, plain) ||
1756 wps_build_encr_settings(wps, msg, plain) ||
1757 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1758 wps_build_authenticator(wps, msg)) {
1759 wpabuf_free(plain);
1760 wpabuf_free(msg);
1761 return NULL;
1762 }
1763 wpabuf_free(plain);
1764
1765 wps->state = RECV_M5;
1766 return msg;
1767}
1768
1769
1770static struct wpabuf * wps_build_m6(struct wps_data *wps)
1771{
1772 struct wpabuf *msg, *plain;
1773
1774 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1775
1776 plain = wpabuf_alloc(200);
1777 if (plain == NULL)
1778 return NULL;
1779
1780 msg = wpabuf_alloc(1000);
1781 if (msg == NULL) {
1782 wpabuf_free(plain);
1783 return NULL;
1784 }
1785
1786 if (wps_build_version(msg) ||
1787 wps_build_msg_type(msg, WPS_M6) ||
1788 wps_build_enrollee_nonce(wps, msg) ||
1789 wps_build_r_snonce2(wps, plain) ||
1790 wps_build_key_wrap_auth(wps, plain) ||
1791 wps_build_encr_settings(wps, msg, plain) ||
1792 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1793 wps_build_authenticator(wps, msg)) {
1794 wpabuf_free(plain);
1795 wpabuf_free(msg);
1796 return NULL;
1797 }
1798 wpabuf_free(plain);
1799
1800 wps->wps_pin_revealed = 1;
1801 wps->state = RECV_M7;
1802 return msg;
1803}
1804
1805
1806static struct wpabuf * wps_build_m8(struct wps_data *wps)
1807{
1808 struct wpabuf *msg, *plain;
1809
1810 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1811
1812 plain = wpabuf_alloc(500);
1813 if (plain == NULL)
1814 return NULL;
1815
1816 msg = wpabuf_alloc(1000);
1817 if (msg == NULL) {
1818 wpabuf_free(plain);
1819 return NULL;
1820 }
1821
1822 if (wps_build_version(msg) ||
1823 wps_build_msg_type(msg, WPS_M8) ||
1824 wps_build_enrollee_nonce(wps, msg) ||
1825 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1826 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1827 wps_build_key_wrap_auth(wps, plain) ||
1828 wps_build_encr_settings(wps, msg, plain) ||
1829 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1830 wps_build_authenticator(wps, msg)) {
1831 wpabuf_free(plain);
1832 wpabuf_free(msg);
1833 return NULL;
1834 }
1835 wpabuf_free(plain);
1836
1837 wps->state = RECV_DONE;
1838 return msg;
1839}
1840
1841
1842struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1843 enum wsc_op_code *op_code)
1844{
1845 struct wpabuf *msg;
1846
1847#ifdef CONFIG_WPS_UPNP
1848 if (!wps->int_reg && wps->wps->wps_upnp) {
1849 struct upnp_pending_message *p, *prev = NULL;
1850 if (wps->ext_reg > 1)
1851 wps_registrar_free_pending_m2(wps->wps);
1852 p = wps->wps->upnp_msgs;
1853 /* TODO: check pending message MAC address */
1854 while (p && p->next) {
1855 prev = p;
1856 p = p->next;
1857 }
1858 if (p) {
1859 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1860 "UPnP");
1861 if (prev)
1862 prev->next = NULL;
1863 else
1864 wps->wps->upnp_msgs = NULL;
1865 msg = p->msg;
1866 switch (p->type) {
1867 case WPS_WSC_ACK:
1868 *op_code = WSC_ACK;
1869 break;
1870 case WPS_WSC_NACK:
1871 *op_code = WSC_NACK;
1872 break;
1873 default:
1874 *op_code = WSC_MSG;
1875 break;
1876 }
1877 os_free(p);
1878 if (wps->ext_reg == 0)
1879 wps->ext_reg = 1;
1880 return msg;
1881 }
1882 }
1883 if (wps->ext_reg) {
1884 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1885 "pending message available");
1886 return NULL;
1887 }
1888#endif /* CONFIG_WPS_UPNP */
1889
1890 switch (wps->state) {
1891 case SEND_M2:
1892 if (wps_get_dev_password(wps) < 0)
1893 msg = wps_build_m2d(wps);
1894 else
1895 msg = wps_build_m2(wps);
1896 *op_code = WSC_MSG;
1897 break;
1898 case SEND_M2D:
1899 msg = wps_build_m2d(wps);
1900 *op_code = WSC_MSG;
1901 break;
1902 case SEND_M4:
1903 msg = wps_build_m4(wps);
1904 *op_code = WSC_MSG;
1905 break;
1906 case SEND_M6:
1907 msg = wps_build_m6(wps);
1908 *op_code = WSC_MSG;
1909 break;
1910 case SEND_M8:
1911 msg = wps_build_m8(wps);
1912 *op_code = WSC_MSG;
1913 break;
1914 case RECV_DONE:
1915 msg = wps_build_wsc_ack(wps);
1916 *op_code = WSC_ACK;
1917 break;
1918 case SEND_WSC_NACK:
1919 msg = wps_build_wsc_nack(wps);
1920 *op_code = WSC_NACK;
1921 break;
1922 default:
1923 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1924 "a message", wps->state);
1925 msg = NULL;
1926 break;
1927 }
1928
1929 if (*op_code == WSC_MSG && msg) {
1930 /* Save a copy of the last message for Authenticator derivation
1931 */
1932 wpabuf_free(wps->last_msg);
1933 wps->last_msg = wpabuf_dup(msg);
1934 }
1935
1936 return msg;
1937}
1938
1939
1940static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1941{
1942 if (e_nonce == NULL) {
1943 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1944 return -1;
1945 }
1946
1947 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1948 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1949 wps->nonce_e, WPS_NONCE_LEN);
1950
1951 return 0;
1952}
1953
1954
1955static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1956{
1957 if (r_nonce == NULL) {
1958 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1959 return -1;
1960 }
1961
1962 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1963 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1964 return -1;
1965 }
1966
1967 return 0;
1968}
1969
1970
1971static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1972{
1973 if (uuid_e == NULL) {
1974 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1975 return -1;
1976 }
1977
1978 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1979 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1980
1981 return 0;
1982}
1983
1984
1985static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1986{
1987 if (pw_id == NULL) {
1988 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1989 return -1;
1990 }
1991
1992 wps->dev_pw_id = WPA_GET_BE16(pw_id);
1993 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1994
1995 return 0;
1996}
1997
1998
1999static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2000{
2001 if (e_hash1 == NULL) {
2002 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2003 return -1;
2004 }
2005
2006 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2007 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2008
2009 return 0;
2010}
2011
2012
2013static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2014{
2015 if (e_hash2 == NULL) {
2016 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2017 return -1;
2018 }
2019
2020 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2021 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2022
2023 return 0;
2024}
2025
2026
2027static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2028{
2029 u8 hash[SHA256_MAC_LEN];
2030 const u8 *addr[4];
2031 size_t len[4];
2032
2033 if (e_snonce1 == NULL) {
2034 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2035 return -1;
2036 }
2037
2038 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2039 WPS_SECRET_NONCE_LEN);
2040
2041 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2042 addr[0] = e_snonce1;
2043 len[0] = WPS_SECRET_NONCE_LEN;
2044 addr[1] = wps->psk1;
2045 len[1] = WPS_PSK_LEN;
2046 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2047 len[2] = wpabuf_len(wps->dh_pubkey_e);
2048 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2049 len[3] = wpabuf_len(wps->dh_pubkey_r);
2050 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2051
2052 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2053 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2054 "not match with the pre-committed value");
2055 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2056 wps_pwd_auth_fail_event(wps->wps, 0, 1);
2057 return -1;
2058 }
2059
2060 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2061 "half of the device password");
2062
2063 return 0;
2064}
2065
2066
2067static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2068{
2069 u8 hash[SHA256_MAC_LEN];
2070 const u8 *addr[4];
2071 size_t len[4];
2072
2073 if (e_snonce2 == NULL) {
2074 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2075 return -1;
2076 }
2077
2078 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2079 WPS_SECRET_NONCE_LEN);
2080
2081 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2082 addr[0] = e_snonce2;
2083 len[0] = WPS_SECRET_NONCE_LEN;
2084 addr[1] = wps->psk2;
2085 len[1] = WPS_PSK_LEN;
2086 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2087 len[2] = wpabuf_len(wps->dh_pubkey_e);
2088 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2089 len[3] = wpabuf_len(wps->dh_pubkey_r);
2090 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2091
2092 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2093 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2094 "not match with the pre-committed value");
2095 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2096 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2097 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2098 return -1;
2099 }
2100
2101 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2102 "half of the device password");
2103 wps->wps_pin_revealed = 0;
2104 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2105
2106 return 0;
2107}
2108
2109
2110static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2111{
2112 if (mac_addr == NULL) {
2113 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2114 return -1;
2115 }
2116
2117 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2118 MAC2STR(mac_addr));
2119 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2120 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2121
2122 return 0;
2123}
2124
2125
2126static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2127 size_t pk_len)
2128{
2129 if (pk == NULL || pk_len == 0) {
2130 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2131 return -1;
2132 }
2133
2134#ifdef CONFIG_WPS_OOB
2135 if (wps->wps->oob_conf.pubkey_hash != NULL) {
2136 const u8 *addr[1];
2137 u8 hash[WPS_HASH_LEN];
2138
2139 addr[0] = pk;
2140 sha256_vector(1, addr, &pk_len, hash);
2141 if (os_memcmp(hash,
2142 wpabuf_head(wps->wps->oob_conf.pubkey_hash),
2143 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2144 wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
2145 return -1;
2146 }
2147 }
2148#endif /* CONFIG_WPS_OOB */
2149
2150 wpabuf_free(wps->dh_pubkey_e);
2151 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2152 if (wps->dh_pubkey_e == NULL)
2153 return -1;
2154
2155 return 0;
2156}
2157
2158
2159static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2160{
2161 u16 auth_types;
2162
2163 if (auth == NULL) {
2164 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2165 "received");
2166 return -1;
2167 }
2168
2169 auth_types = WPA_GET_BE16(auth);
2170
2171 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2172 auth_types);
2173 wps->auth_type = wps->wps->auth_types & auth_types;
2174 if (wps->auth_type == 0) {
2175 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2176 "authentication types (own 0x%x Enrollee 0x%x)",
2177 wps->wps->auth_types, auth_types);
2178#ifdef WPS_WORKAROUNDS
2179 /*
2180 * Some deployed implementations seem to advertise incorrect
2181 * information in this attribute. For example, Linksys WRT350N
2182 * seems to have a byteorder bug that breaks this negotiation.
2183 * In order to interoperate with existing implementations,
2184 * assume that the Enrollee supports everything we do.
2185 */
2186 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2187 "does not advertise supported authentication types "
2188 "correctly");
2189 wps->auth_type = wps->wps->auth_types;
2190#else /* WPS_WORKAROUNDS */
2191 return -1;
2192#endif /* WPS_WORKAROUNDS */
2193 }
2194
2195 return 0;
2196}
2197
2198
2199static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2200{
2201 u16 encr_types;
2202
2203 if (encr == NULL) {
2204 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2205 "received");
2206 return -1;
2207 }
2208
2209 encr_types = WPA_GET_BE16(encr);
2210
2211 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2212 encr_types);
2213 wps->encr_type = wps->wps->encr_types & encr_types;
2214 if (wps->encr_type == 0) {
2215 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2216 "encryption types (own 0x%x Enrollee 0x%x)",
2217 wps->wps->encr_types, encr_types);
2218#ifdef WPS_WORKAROUNDS
2219 /*
2220 * Some deployed implementations seem to advertise incorrect
2221 * information in this attribute. For example, Linksys WRT350N
2222 * seems to have a byteorder bug that breaks this negotiation.
2223 * In order to interoperate with existing implementations,
2224 * assume that the Enrollee supports everything we do.
2225 */
2226 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2227 "does not advertise supported encryption types "
2228 "correctly");
2229 wps->encr_type = wps->wps->encr_types;
2230#else /* WPS_WORKAROUNDS */
2231 return -1;
2232#endif /* WPS_WORKAROUNDS */
2233 }
2234
2235 return 0;
2236}
2237
2238
2239static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2240{
2241 if (conn == NULL) {
2242 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2243 "received");
2244 return -1;
2245 }
2246
2247 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2248 *conn);
2249
2250 return 0;
2251}
2252
2253
2254static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2255{
2256 u16 m;
2257
2258 if (methods == NULL) {
2259 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2260 return -1;
2261 }
2262
2263 m = WPA_GET_BE16(methods);
2264
2265 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2266 "%s%s%s%s%s%s%s%s%s", m,
2267 m & WPS_CONFIG_USBA ? " [USBA]" : "",
2268 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2269 m & WPS_CONFIG_LABEL ? " [Label]" : "",
2270 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2271 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2272 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2273 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2274 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2275 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2276
2277 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2278 /*
2279 * The Enrollee does not have a display so it is unlikely to be
2280 * able to show the passphrase to a user and as such, could
2281 * benefit from receiving PSK to reduce key derivation time.
2282 */
2283 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2284 "Enrollee not supporting display");
2285 wps->use_psk_key = 1;
2286 }
2287
2288 return 0;
2289}
2290
2291
2292static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2293{
2294 if (state == NULL) {
2295 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2296 "received");
2297 return -1;
2298 }
2299
2300 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2301 *state);
2302
2303 return 0;
2304}
2305
2306
2307static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2308{
2309 u16 a;
2310
2311 if (assoc == NULL) {
2312 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2313 return -1;
2314 }
2315
2316 a = WPA_GET_BE16(assoc);
2317 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2318
2319 return 0;
2320}
2321
2322
2323static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2324{
2325 u16 e;
2326
2327 if (err == NULL) {
2328 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2329 return -1;
2330 }
2331
2332 e = WPA_GET_BE16(err);
2333 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2334
2335 return 0;
2336}
2337
2338
2339static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2340{
2341#ifdef CONFIG_P2P
2342 struct wps_registrar *reg = wps->wps->registrar;
2343
2344 if (is_zero_ether_addr(reg->p2p_dev_addr))
2345 return 1; /* no filtering in use */
2346
2347 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2348 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2349 "filtering for PBC: expected " MACSTR " was "
2350 MACSTR " - indicate PBC session overlap",
2351 MAC2STR(reg->p2p_dev_addr),
2352 MAC2STR(wps->p2p_dev_addr));
2353 return 0;
2354 }
2355#endif /* CONFIG_P2P */
2356 return 1;
2357}
2358
2359
2360static int wps_registrar_skip_overlap(struct wps_data *wps)
2361{
2362#ifdef CONFIG_P2P
2363 struct wps_registrar *reg = wps->wps->registrar;
2364
2365 if (is_zero_ether_addr(reg->p2p_dev_addr))
2366 return 0; /* no specific Enrollee selected */
2367
2368 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2369 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2370 "Enrollee match");
2371 return 1;
2372 }
2373#endif /* CONFIG_P2P */
2374 return 0;
2375}
2376
2377
2378static enum wps_process_res wps_process_m1(struct wps_data *wps,
2379 struct wps_parse_attr *attr)
2380{
2381 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2382
2383 if (wps->state != RECV_M1) {
2384 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2385 "receiving M1", wps->state);
2386 return WPS_FAILURE;
2387 }
2388
2389 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2390 wps_process_mac_addr(wps, attr->mac_addr) ||
2391 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2392 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2393 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2394 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2395 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2396 wps_process_config_methods(wps, attr->config_methods) ||
2397 wps_process_wps_state(wps, attr->wps_state) ||
2398 wps_process_device_attrs(&wps->peer_dev, attr) ||
2399 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2400 wps_process_assoc_state(wps, attr->assoc_state) ||
2401 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2402 wps_process_config_error(wps, attr->config_error) ||
2403 wps_process_os_version(&wps->peer_dev, attr->os_version))
2404 return WPS_FAILURE;
2405
2406 if (wps->dev_pw_id < 0x10 &&
2407 wps->dev_pw_id != DEV_PW_DEFAULT &&
2408 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2409 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2410 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2411 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2412 !wps->wps->registrar->pbc)) {
2413 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2414 wps->dev_pw_id);
2415 wps->state = SEND_M2D;
2416 return WPS_CONTINUE;
2417 }
2418
2419#ifdef CONFIG_WPS_OOB
2420 if (wps->dev_pw_id >= 0x10 &&
2421 wps->dev_pw_id != wps->wps->oob_dev_pw_id) {
2422 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID "
2423 "%d mismatch", wps->dev_pw_id);
2424 wps->state = SEND_M2D;
2425 return WPS_CONTINUE;
2426 }
2427#endif /* CONFIG_WPS_OOB */
2428
2429 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2430 if ((wps->wps->registrar->force_pbc_overlap ||
2431 wps_registrar_pbc_overlap(wps->wps->registrar,
2432 wps->mac_addr_e, wps->uuid_e) ||
2433 !wps_registrar_p2p_dev_addr_match(wps)) &&
2434 !wps_registrar_skip_overlap(wps)) {
2435 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2436 "negotiation");
2437 wps->state = SEND_M2D;
2438 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2439 wps_pbc_overlap_event(wps->wps);
2440 wps_fail_event(wps->wps, WPS_M1,
2441 WPS_CFG_MULTIPLE_PBC_DETECTED,
2442 WPS_EI_NO_ERROR);
2443 wps->wps->registrar->force_pbc_overlap = 1;
2444 return WPS_CONTINUE;
2445 }
2446 wps_registrar_add_pbc_session(wps->wps->registrar,
2447 wps->mac_addr_e, wps->uuid_e);
2448 wps->pbc = 1;
2449 }
2450
2451#ifdef WPS_WORKAROUNDS
2452 /*
2453 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2454 * passphrase format. To avoid interop issues, force PSK format to be
2455 * used.
2456 */
2457 if (!wps->use_psk_key &&
2458 wps->peer_dev.manufacturer &&
2459 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2460 wps->peer_dev.model_name &&
2461 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2462 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2463 "PSK format");
2464 wps->use_psk_key = 1;
2465 }
2466#endif /* WPS_WORKAROUNDS */
2467
2468 wps->state = SEND_M2;
2469 return WPS_CONTINUE;
2470}
2471
2472
2473static enum wps_process_res wps_process_m3(struct wps_data *wps,
2474 const struct wpabuf *msg,
2475 struct wps_parse_attr *attr)
2476{
2477 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2478
2479 if (wps->state != RECV_M3) {
2480 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2481 "receiving M3", wps->state);
2482 wps->state = SEND_WSC_NACK;
2483 return WPS_CONTINUE;
2484 }
2485
2486 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2487 !wps_registrar_skip_overlap(wps)) {
2488 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2489 "session overlap");
2490 wps->state = SEND_WSC_NACK;
2491 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2492 return WPS_CONTINUE;
2493 }
2494
2495 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2496 wps_process_authenticator(wps, attr->authenticator, msg) ||
2497 wps_process_e_hash1(wps, attr->e_hash1) ||
2498 wps_process_e_hash2(wps, attr->e_hash2)) {
2499 wps->state = SEND_WSC_NACK;
2500 return WPS_CONTINUE;
2501 }
2502
2503 wps->state = SEND_M4;
2504 return WPS_CONTINUE;
2505}
2506
2507
2508static enum wps_process_res wps_process_m5(struct wps_data *wps,
2509 const struct wpabuf *msg,
2510 struct wps_parse_attr *attr)
2511{
2512 struct wpabuf *decrypted;
2513 struct wps_parse_attr eattr;
2514
2515 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2516
2517 if (wps->state != RECV_M5) {
2518 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2519 "receiving M5", wps->state);
2520 wps->state = SEND_WSC_NACK;
2521 return WPS_CONTINUE;
2522 }
2523
2524 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2525 !wps_registrar_skip_overlap(wps)) {
2526 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2527 "session overlap");
2528 wps->state = SEND_WSC_NACK;
2529 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2530 return WPS_CONTINUE;
2531 }
2532
2533 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2534 wps_process_authenticator(wps, attr->authenticator, msg)) {
2535 wps->state = SEND_WSC_NACK;
2536 return WPS_CONTINUE;
2537 }
2538
2539 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2540 attr->encr_settings_len);
2541 if (decrypted == NULL) {
2542 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2543 "Settings attribute");
2544 wps->state = SEND_WSC_NACK;
2545 return WPS_CONTINUE;
2546 }
2547
2548 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2549 wpabuf_free(decrypted);
2550 wps->state = SEND_WSC_NACK;
2551 return WPS_CONTINUE;
2552 }
2553
2554 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2555 "attribute");
2556 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2557 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2558 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2559 wpabuf_free(decrypted);
2560 wps->state = SEND_WSC_NACK;
2561 return WPS_CONTINUE;
2562 }
2563 wpabuf_free(decrypted);
2564
2565 wps->state = SEND_M6;
2566 return WPS_CONTINUE;
2567}
2568
2569
2570static void wps_sta_cred_cb(struct wps_data *wps)
2571{
2572 /*
2573 * Update credential to only include a single authentication and
2574 * encryption type in case the AP configuration includes more than one
2575 * option.
2576 */
2577 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2578 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2579 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2580 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2581 if (wps->cred.encr_type & WPS_ENCR_AES)
2582 wps->cred.encr_type = WPS_ENCR_AES;
2583 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2584 wps->cred.encr_type = WPS_ENCR_TKIP;
2585 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2586 "AP configuration");
2587 if (wps->wps->cred_cb)
2588 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2589}
2590
2591
2592static void wps_cred_update(struct wps_credential *dst,
2593 struct wps_credential *src)
2594{
2595 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2596 dst->ssid_len = src->ssid_len;
2597 dst->auth_type = src->auth_type;
2598 dst->encr_type = src->encr_type;
2599 dst->key_idx = src->key_idx;
2600 os_memcpy(dst->key, src->key, sizeof(dst->key));
2601 dst->key_len = src->key_len;
2602}
2603
2604
2605static int wps_process_ap_settings_r(struct wps_data *wps,
2606 struct wps_parse_attr *attr)
2607{
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]2608 struct wpabuf *msg;
2609
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2610 if (wps->wps->ap || wps->er)
2611 return 0;
2612
2613 /* AP Settings Attributes in M7 when Enrollee is an AP */
2614 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2615 return -1;
2616
2617 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2618
2619 if (wps->new_ap_settings) {
2620 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2621 "new settings");
2622 wps_cred_update(&wps->cred, wps->new_ap_settings);
2623 return 0;
2624 } else {
2625 /*
2626 * Use the AP PIN only to receive the current AP settings, not
2627 * to reconfigure the AP.
2628 */
2629
2630 /*
2631 * Clear selected registrar here since we do not get to
2632 * WSC_Done in this protocol run.
2633 */
2634 wps_registrar_pin_completed(wps->wps->registrar);
2635
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]2636 msg = wps_build_ap_cred(wps);
2637 if (msg == NULL)
2638 return -1;
2639 wps->cred.cred_attr = wpabuf_head(msg);
2640 wps->cred.cred_attr_len = wpabuf_len(msg);
2641
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2642 if (wps->ap_settings_cb) {
2643 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2644 &wps->cred);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]2645 wpabuf_free(msg);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2646 return 1;
2647 }
2648 wps_sta_cred_cb(wps);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]2649
2650 wps->cred.cred_attr = NULL;
2651 wps->cred.cred_attr_len = 0;
2652 wpabuf_free(msg);
2653
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2654 return 1;
2655 }
2656}
2657
2658
2659static enum wps_process_res wps_process_m7(struct wps_data *wps,
2660 const struct wpabuf *msg,
2661 struct wps_parse_attr *attr)
2662{
2663 struct wpabuf *decrypted;
2664 struct wps_parse_attr eattr;
2665
2666 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2667
2668 if (wps->state != RECV_M7) {
2669 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2670 "receiving M7", wps->state);
2671 wps->state = SEND_WSC_NACK;
2672 return WPS_CONTINUE;
2673 }
2674
2675 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2676 !wps_registrar_skip_overlap(wps)) {
2677 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2678 "session overlap");
2679 wps->state = SEND_WSC_NACK;
2680 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2681 return WPS_CONTINUE;
2682 }
2683
2684 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2685 wps_process_authenticator(wps, attr->authenticator, msg)) {
2686 wps->state = SEND_WSC_NACK;
2687 return WPS_CONTINUE;
2688 }
2689
2690 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2691 attr->encr_settings_len);
2692 if (decrypted == NULL) {
2693 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2694 "Settings attribute");
2695 wps->state = SEND_WSC_NACK;
2696 return WPS_CONTINUE;
2697 }
2698
2699 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2700 attr->version2 != NULL) < 0) {
2701 wpabuf_free(decrypted);
2702 wps->state = SEND_WSC_NACK;
2703 return WPS_CONTINUE;
2704 }
2705
2706 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2707 "attribute");
2708 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2709 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2710 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2711 wps_process_ap_settings_r(wps, &eattr)) {
2712 wpabuf_free(decrypted);
2713 wps->state = SEND_WSC_NACK;
2714 return WPS_CONTINUE;
2715 }
2716
2717 wpabuf_free(decrypted);
2718
2719 wps->state = SEND_M8;
2720 return WPS_CONTINUE;
2721}
2722
2723
2724static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2725 const struct wpabuf *msg)
2726{
2727 struct wps_parse_attr attr;
2728 enum wps_process_res ret = WPS_CONTINUE;
2729
2730 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2731
2732 if (wps_parse_msg(msg, &attr) < 0)
2733 return WPS_FAILURE;
2734
2735 if (attr.msg_type == NULL) {
2736 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2737 wps->state = SEND_WSC_NACK;
2738 return WPS_CONTINUE;
2739 }
2740
2741 if (*attr.msg_type != WPS_M1 &&
2742 (attr.registrar_nonce == NULL ||
2743 os_memcmp(wps->nonce_r, attr.registrar_nonce,
2744 WPS_NONCE_LEN != 0))) {
2745 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2746 return WPS_FAILURE;
2747 }
2748
2749 switch (*attr.msg_type) {
2750 case WPS_M1:
2751 if (wps_validate_m1(msg) < 0)
2752 return WPS_FAILURE;
2753#ifdef CONFIG_WPS_UPNP
2754 if (wps->wps->wps_upnp && attr.mac_addr) {
2755 /* Remove old pending messages when starting new run */
2756 wps_free_pending_msgs(wps->wps->upnp_msgs);
2757 wps->wps->upnp_msgs = NULL;
2758
2759 upnp_wps_device_send_wlan_event(
2760 wps->wps->wps_upnp, attr.mac_addr,
2761 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2762 }
2763#endif /* CONFIG_WPS_UPNP */
2764 ret = wps_process_m1(wps, &attr);
2765 break;
2766 case WPS_M3:
2767 if (wps_validate_m3(msg) < 0)
2768 return WPS_FAILURE;
2769 ret = wps_process_m3(wps, msg, &attr);
2770 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2771 wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2772 wps->error_indication);
2773 break;
2774 case WPS_M5:
2775 if (wps_validate_m5(msg) < 0)
2776 return WPS_FAILURE;
2777 ret = wps_process_m5(wps, msg, &attr);
2778 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2779 wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2780 wps->error_indication);
2781 break;
2782 case WPS_M7:
2783 if (wps_validate_m7(msg) < 0)
2784 return WPS_FAILURE;
2785 ret = wps_process_m7(wps, msg, &attr);
2786 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2787 wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2788 wps->error_indication);
2789 break;
2790 default:
2791 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2792 *attr.msg_type);
2793 return WPS_FAILURE;
2794 }
2795
2796 if (ret == WPS_CONTINUE) {
2797 /* Save a copy of the last message for Authenticator derivation
2798 */
2799 wpabuf_free(wps->last_msg);
2800 wps->last_msg = wpabuf_dup(msg);
2801 }
2802
2803 return ret;
2804}
2805
2806
2807static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2808 const struct wpabuf *msg)
2809{
2810 struct wps_parse_attr attr;
2811
2812 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2813
2814 if (wps_parse_msg(msg, &attr) < 0)
2815 return WPS_FAILURE;
2816
2817 if (attr.msg_type == NULL) {
2818 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2819 return WPS_FAILURE;
2820 }
2821
2822 if (*attr.msg_type != WPS_WSC_ACK) {
2823 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2824 *attr.msg_type);
2825 return WPS_FAILURE;
2826 }
2827
2828#ifdef CONFIG_WPS_UPNP
2829 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2830 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2831 if (wps->wps->upnp_msgs)
2832 return WPS_CONTINUE;
2833 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2834 "external Registrar");
2835 return WPS_PENDING;
2836 }
2837#endif /* CONFIG_WPS_UPNP */
2838
2839 if (attr.registrar_nonce == NULL ||
2840 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2841 {
2842 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2843 return WPS_FAILURE;
2844 }
2845
2846 if (attr.enrollee_nonce == NULL ||
2847 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2848 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2849 return WPS_FAILURE;
2850 }
2851
2852 if (wps->state == RECV_M2D_ACK) {
2853#ifdef CONFIG_WPS_UPNP
2854 if (wps->wps->wps_upnp &&
2855 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2856 if (wps->wps->upnp_msgs)
2857 return WPS_CONTINUE;
2858 if (wps->ext_reg == 0)
2859 wps->ext_reg = 1;
2860 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2861 "external Registrar");
2862 return WPS_PENDING;
2863 }
2864#endif /* CONFIG_WPS_UPNP */
2865
2866 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2867 "terminate negotiation");
2868 }
2869
2870 return WPS_FAILURE;
2871}
2872
2873
2874static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2875 const struct wpabuf *msg)
2876{
2877 struct wps_parse_attr attr;
2878 int old_state;
2879 u16 config_error;
2880
2881 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2882
2883 old_state = wps->state;
2884 wps->state = SEND_WSC_NACK;
2885
2886 if (wps_parse_msg(msg, &attr) < 0)
2887 return WPS_FAILURE;
2888
2889 if (attr.msg_type == NULL) {
2890 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2891 return WPS_FAILURE;
2892 }
2893
2894 if (*attr.msg_type != WPS_WSC_NACK) {
2895 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2896 *attr.msg_type);
2897 return WPS_FAILURE;
2898 }
2899
2900#ifdef CONFIG_WPS_UPNP
2901 if (wps->wps->wps_upnp && wps->ext_reg) {
2902 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2903 "Registrar terminated by the Enrollee");
2904 return WPS_FAILURE;
2905 }
2906#endif /* CONFIG_WPS_UPNP */
2907
2908 if (attr.registrar_nonce == NULL ||
2909 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2910 {
2911 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2912 return WPS_FAILURE;
2913 }
2914
2915 if (attr.enrollee_nonce == NULL ||
2916 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2917 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2918 return WPS_FAILURE;
2919 }
2920
2921 if (attr.config_error == NULL) {
2922 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2923 "in WSC_NACK");
2924 return WPS_FAILURE;
2925 }
2926
2927 config_error = WPA_GET_BE16(attr.config_error);
2928 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2929 "Configuration Error %d", config_error);
2930
2931 switch (old_state) {
2932 case RECV_M3:
2933 wps_fail_event(wps->wps, WPS_M2, config_error,
2934 wps->error_indication);
2935 break;
2936 case RECV_M5:
2937 wps_fail_event(wps->wps, WPS_M4, config_error,
2938 wps->error_indication);
2939 break;
2940 case RECV_M7:
2941 wps_fail_event(wps->wps, WPS_M6, config_error,
2942 wps->error_indication);
2943 break;
2944 case RECV_DONE:
2945 wps_fail_event(wps->wps, WPS_M8, config_error,
2946 wps->error_indication);
2947 break;
2948 default:
2949 break;
2950 }
2951
2952 return WPS_FAILURE;
2953}
2954
2955
2956static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2957 const struct wpabuf *msg)
2958{
2959 struct wps_parse_attr attr;
2960
2961 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2962
2963 if (wps->state != RECV_DONE &&
2964 (!wps->wps->wps_upnp || !wps->ext_reg)) {
2965 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2966 "receiving WSC_Done", wps->state);
2967 return WPS_FAILURE;
2968 }
2969
2970 if (wps_parse_msg(msg, &attr) < 0)
2971 return WPS_FAILURE;
2972
2973 if (attr.msg_type == NULL) {
2974 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2975 return WPS_FAILURE;
2976 }
2977
2978 if (*attr.msg_type != WPS_WSC_DONE) {
2979 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2980 *attr.msg_type);
2981 return WPS_FAILURE;
2982 }
2983
2984#ifdef CONFIG_WPS_UPNP
2985 if (wps->wps->wps_upnp && wps->ext_reg) {
2986 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2987 "Registrar completed successfully");
2988 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2989 wps->uuid_e);
2990 return WPS_DONE;
2991 }
2992#endif /* CONFIG_WPS_UPNP */
2993
2994 if (attr.registrar_nonce == NULL ||
2995 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2996 {
2997 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2998 return WPS_FAILURE;
2999 }
3000
3001 if (attr.enrollee_nonce == NULL ||
3002 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
3003 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3004 return WPS_FAILURE;
3005 }
3006
3007 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3008 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3009 wps->uuid_e);
3010
3011 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3012 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3013 struct wps_credential cred;
3014
3015 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3016 "on first Enrollee connection");
3017
3018 os_memset(&cred, 0, sizeof(cred));
3019 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3020 cred.ssid_len = wps->wps->ssid_len;
3021 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3022 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3023 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3024 cred.key_len = wps->new_psk_len;
3025
3026 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3027 wpa_hexdump_ascii_key(MSG_DEBUG,
3028 "WPS: Generated random passphrase",
3029 wps->new_psk, wps->new_psk_len);
3030 if (wps->wps->cred_cb)
3031 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3032
3033 os_free(wps->new_psk);
3034 wps->new_psk = NULL;
3035 }
3036
3037 if (!wps->wps->ap && !wps->er)
3038 wps_sta_cred_cb(wps);
3039
3040 if (wps->new_psk) {
3041 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3042 wps->new_psk, wps->new_psk_len)) {
3043 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3044 "new PSK");
3045 }
3046 os_free(wps->new_psk);
3047 wps->new_psk = NULL;
3048 }
3049
3050 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
3051
3052 if (wps->pbc) {
3053 wps_registrar_remove_pbc_session(wps->wps->registrar,
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame^]3054 wps->uuid_e,
3055 wps->p2p_dev_addr);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]3056 wps_registrar_pbc_completed(wps->wps->registrar);
3057 } else {
3058 wps_registrar_pin_completed(wps->wps->registrar);
3059 }
3060 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3061 * merge them into APs own list.. */
3062
3063 wps_success_event(wps->wps);
3064
3065 return WPS_DONE;
3066}
3067
3068
3069enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3070 enum wsc_op_code op_code,
3071 const struct wpabuf *msg)
3072{
3073 enum wps_process_res ret;
3074
3075 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3076 "op_code=%d)",
3077 (unsigned long) wpabuf_len(msg), op_code);
3078
3079#ifdef CONFIG_WPS_UPNP
3080 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3081 struct wps_parse_attr attr;
3082 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3083 *attr.msg_type == WPS_M3)
3084 wps->ext_reg = 2; /* past M2/M2D phase */
3085 }
3086 if (wps->ext_reg > 1)
3087 wps_registrar_free_pending_m2(wps->wps);
3088 if (wps->wps->wps_upnp && wps->ext_reg &&
3089 wps->wps->upnp_msgs == NULL &&
3090 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3091 {
3092 struct wps_parse_attr attr;
3093 int type;
3094 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3095 type = -1;
3096 else
3097 type = *attr.msg_type;
3098 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3099 " to external Registrar for processing", type);
3100 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3101 wps->mac_addr_e,
3102 UPNP_WPS_WLANEVENT_TYPE_EAP,
3103 msg);
3104 if (op_code == WSC_MSG)
3105 return WPS_PENDING;
3106 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3107 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3108 "external Registrar");
3109 return WPS_CONTINUE;
3110 }
3111#endif /* CONFIG_WPS_UPNP */
3112
3113 switch (op_code) {
3114 case WSC_MSG:
3115 return wps_process_wsc_msg(wps, msg);
3116 case WSC_ACK:
3117 if (wps_validate_wsc_ack(msg) < 0)
3118 return WPS_FAILURE;
3119 return wps_process_wsc_ack(wps, msg);
3120 case WSC_NACK:
3121 if (wps_validate_wsc_nack(msg) < 0)
3122 return WPS_FAILURE;
3123 return wps_process_wsc_nack(wps, msg);
3124 case WSC_Done:
3125 if (wps_validate_wsc_done(msg) < 0)
3126 return WPS_FAILURE;
3127 ret = wps_process_wsc_done(wps, msg);
3128 if (ret == WPS_FAILURE) {
3129 wps->state = SEND_WSC_NACK;
3130 wps_fail_event(wps->wps, WPS_WSC_DONE,
3131 wps->config_error,
3132 wps->error_indication);
3133 }
3134 return ret;
3135 default:
3136 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3137 return WPS_FAILURE;
3138 }
3139}
3140
3141
3142int wps_registrar_update_ie(struct wps_registrar *reg)
3143{
3144 return wps_set_ie(reg);
3145}
3146
3147
3148static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3149 void *timeout_ctx)
3150{
3151 struct wps_registrar *reg = eloop_ctx;
3152
3153 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3154 "unselect internal Registrar");
3155 reg->selected_registrar = 0;
3156 reg->pbc = 0;
3157 wps_registrar_selected_registrar_changed(reg);
3158}
3159
3160
3161#ifdef CONFIG_WPS_UPNP
3162static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3163 struct subscription *s)
3164{
3165 int i, j;
3166 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3167 "config_methods=0x%x)",
3168 s->dev_password_id, s->config_methods);
3169 reg->sel_reg_union = 1;
3170 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3171 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3172 if (reg->sel_reg_config_methods_override == -1)
3173 reg->sel_reg_config_methods_override = 0;
3174 reg->sel_reg_config_methods_override |= s->config_methods;
3175 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3176 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3177 break;
3178 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3179 j++) {
3180 if (is_zero_ether_addr(s->authorized_macs[j]))
3181 break;
3182 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3183 MACSTR, MAC2STR(s->authorized_macs[j]));
3184 os_memcpy(reg->authorized_macs_union[i],
3185 s->authorized_macs[j], ETH_ALEN);
3186 i++;
3187 }
3188 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3189 (u8 *) reg->authorized_macs_union,
3190 sizeof(reg->authorized_macs_union));
3191}
3192#endif /* CONFIG_WPS_UPNP */
3193
3194
3195static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3196{
3197#ifdef CONFIG_WPS_UPNP
3198 struct subscription *s;
3199
3200 if (reg->wps->wps_upnp == NULL)
3201 return;
3202
3203 dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3204 struct subscription, list) {
3205 struct subscr_addr *sa;
3206 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3207 if (sa) {
3208 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3209 inet_ntoa(sa->saddr.sin_addr),
3210 ntohs(sa->saddr.sin_port));
3211 }
3212 if (s->selected_registrar)
3213 wps_registrar_sel_reg_add(reg, s);
3214 else
3215 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3216 "selected");
3217 }
3218#endif /* CONFIG_WPS_UPNP */
3219}
3220
3221
3222/**
3223 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3224 * @reg: Registrar data from wps_registrar_init()
3225 *
3226 * This function is called when selected registrar state changes, e.g., when an
3227 * AP receives a SetSelectedRegistrar UPnP message.
3228 */
3229void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3230{
3231 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3232
3233 reg->sel_reg_union = reg->selected_registrar;
3234 reg->sel_reg_dev_password_id_override = -1;
3235 reg->sel_reg_config_methods_override = -1;
3236 os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3237 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3238 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3239 (u8 *) reg->authorized_macs_union,
3240 sizeof(reg->authorized_macs_union));
3241 if (reg->selected_registrar) {
3242 u16 methods;
3243
3244 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3245#ifdef CONFIG_WPS2
3246 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3247 WPS_CONFIG_PHY_PUSHBUTTON);
3248#endif /* CONFIG_WPS2 */
3249 if (reg->pbc) {
3250 reg->sel_reg_dev_password_id_override =
3251 DEV_PW_PUSHBUTTON;
3252 wps_set_pushbutton(&methods, reg->wps->config_methods);
3253 }
3254 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3255 "(pbc=%d)", reg->pbc);
3256 reg->sel_reg_config_methods_override = methods;
3257 } else
3258 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3259
3260 wps_registrar_sel_reg_union(reg);
3261
3262 wps_set_ie(reg);
3263 wps_cb_set_sel_reg(reg);
3264}
3265
3266
3267int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3268 char *buf, size_t buflen)
3269{
3270 struct wps_registrar_device *d;
3271 int len = 0, ret;
3272 char uuid[40];
3273 char devtype[WPS_DEV_TYPE_BUFSIZE];
3274
3275 d = wps_device_get(reg, addr);
3276 if (d == NULL)
3277 return 0;
3278 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3279 return 0;
3280
3281 ret = os_snprintf(buf + len, buflen - len,
3282 "wpsUuid=%s\n"
3283 "wpsPrimaryDeviceType=%s\n"
3284 "wpsDeviceName=%s\n"
3285 "wpsManufacturer=%s\n"
3286 "wpsModelName=%s\n"
3287 "wpsModelNumber=%s\n"
3288 "wpsSerialNumber=%s\n",
3289 uuid,
3290 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3291 sizeof(devtype)),
3292 d->dev.device_name ? d->dev.device_name : "",
3293 d->dev.manufacturer ? d->dev.manufacturer : "",
3294 d->dev.model_name ? d->dev.model_name : "",
3295 d->dev.model_number ? d->dev.model_number : "",
3296 d->dev.serial_number ? d->dev.serial_number : "");
3297 if (ret < 0 || (size_t) ret >= buflen - len)
3298 return len;
3299 len += ret;
3300
3301 return len;
3302}
3303
3304
3305int wps_registrar_config_ap(struct wps_registrar *reg,
3306 struct wps_credential *cred)
3307{
3308#ifdef CONFIG_WPS2
3309 printf("encr_type=0x%x\n", cred->encr_type);
3310 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3311 WPS_ENCR_AES))) {
3312 if (cred->encr_type & WPS_ENCR_WEP) {
3313 wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3314 "due to WEP configuration");
3315 return -1;
3316 }
3317
3318 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3319 "invalid encr_type 0x%x", cred->encr_type);
3320 return -1;
3321 }
3322
3323 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3324 WPS_ENCR_TKIP) {
3325 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3326 "TKIP+AES");
3327 cred->encr_type |= WPS_ENCR_AES;
3328 }
3329
3330 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3331 WPS_AUTH_WPAPSK) {
3332 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3333 "WPAPSK+WPA2PSK");
3334 cred->auth_type |= WPS_AUTH_WPA2PSK;
3335 }
3336#endif /* CONFIG_WPS2 */
3337
3338 if (reg->wps->cred_cb)
3339 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3340
3341 return -1;
3342}