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gerrit.omnirom.org / android_external_wpa_supplicant_8 / 98f9e76624da6bb96edc1982c423e4a119c5170a / . / src / wps / wps_registrar.c
blob: 5ed7ea4ac462fdc60902b3c8efe9ff2f48323a51 [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 *
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800[diff] [blame]5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]7 */
8
9#include "utils/includes.h"
10
11#include "utils/common.h"
12#include "utils/base64.h"
13#include "utils/eloop.h"
14#include "utils/uuid.h"
15#include "utils/list.h"
16#include "crypto/crypto.h"
17#include "crypto/sha256.h"
18#include "crypto/random.h"
19#include "common/ieee802_11_defs.h"
20#include "wps_i.h"
21#include "wps_dev_attr.h"
22#include "wps_upnp.h"
23#include "wps_upnp_i.h"
24
25#ifndef CONFIG_WPS_STRICT
26#define WPS_WORKAROUNDS
27#endif /* CONFIG_WPS_STRICT */
28
29struct wps_uuid_pin {
30 struct dl_list list;
31 u8 uuid[WPS_UUID_LEN];
32 int wildcard_uuid;
33 u8 *pin;
34 size_t pin_len;
35#define PIN_LOCKED BIT(0)
36#define PIN_EXPIRES BIT(1)
37 int flags;
38 struct os_time expiration;
39 u8 enrollee_addr[ETH_ALEN];
40};
41
42
43static void wps_free_pin(struct wps_uuid_pin *pin)
44{
45 os_free(pin->pin);
46 os_free(pin);
47}
48
49
50static void wps_remove_pin(struct wps_uuid_pin *pin)
51{
52 dl_list_del(&pin->list);
53 wps_free_pin(pin);
54}
55
56
57static void wps_free_pins(struct dl_list *pins)
58{
59 struct wps_uuid_pin *pin, *prev;
60 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
61 wps_remove_pin(pin);
62}
63
64
65struct wps_pbc_session {
66 struct wps_pbc_session *next;
67 u8 addr[ETH_ALEN];
68 u8 uuid_e[WPS_UUID_LEN];
69 struct os_time timestamp;
70};
71
72
73static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
74{
75 struct wps_pbc_session *prev;
76
77 while (pbc) {
78 prev = pbc;
79 pbc = pbc->next;
80 os_free(prev);
81 }
82}
83
84
85struct wps_registrar_device {
86 struct wps_registrar_device *next;
87 struct wps_device_data dev;
88 u8 uuid[WPS_UUID_LEN];
89};
90
91
92struct wps_registrar {
93 struct wps_context *wps;
94
95 int pbc;
96 int selected_registrar;
97
98 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
99 size_t psk_len);
100 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
101 struct wpabuf *probe_resp_ie);
102 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
103 const struct wps_device_data *dev);
104 void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
105 const u8 *uuid_e);
106 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
107 u16 sel_reg_config_methods);
108 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
109 const u8 *pri_dev_type, u16 config_methods,
110 u16 dev_password_id, u8 request_type,
111 const char *dev_name);
112 void *cb_ctx;
113
114 struct dl_list pins;
115 struct wps_pbc_session *pbc_sessions;
116
117 int skip_cred_build;
118 struct wpabuf *extra_cred;
119 int disable_auto_conf;
120 int sel_reg_union;
121 int sel_reg_dev_password_id_override;
122 int sel_reg_config_methods_override;
123 int static_wep_only;
124 int dualband;
125
126 struct wps_registrar_device *devices;
127
128 int force_pbc_overlap;
129
130 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
131 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
132
133 u8 p2p_dev_addr[ETH_ALEN];
134};
135
136
137static int wps_set_ie(struct wps_registrar *reg);
138static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
139static void wps_registrar_set_selected_timeout(void *eloop_ctx,
140 void *timeout_ctx);
141
142
143static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
144 const u8 *addr)
145{
146 int i;
147 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
148 MAC2STR(addr));
149 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
150 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
151 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
152 "already in the list");
153 return; /* already in list */
154 }
155 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
156 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
157 ETH_ALEN);
158 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
159 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
160 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
161}
162
163
164static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
165 const u8 *addr)
166{
167 int i;
168 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
169 MAC2STR(addr));
170 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
171 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
172 break;
173 }
174 if (i == WPS_MAX_AUTHORIZED_MACS) {
175 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
176 "list");
177 return; /* not in the list */
178 }
179 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
180 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
181 ETH_ALEN);
182 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
183 ETH_ALEN);
184 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
185 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
186}
187
188
189static void wps_free_devices(struct wps_registrar_device *dev)
190{
191 struct wps_registrar_device *prev;
192
193 while (dev) {
194 prev = dev;
195 dev = dev->next;
196 wps_device_data_free(&prev->dev);
197 os_free(prev);
198 }
199}
200
201
202static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
203 const u8 *addr)
204{
205 struct wps_registrar_device *dev;
206
207 for (dev = reg->devices; dev; dev = dev->next) {
208 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
209 return dev;
210 }
211 return NULL;
212}
213
214
215static void wps_device_clone_data(struct wps_device_data *dst,
216 struct wps_device_data *src)
217{
218 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
219 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
220
221#define WPS_STRDUP(n) \
222 os_free(dst->n); \
223 dst->n = src->n ? os_strdup(src->n) : NULL
224
225 WPS_STRDUP(device_name);
226 WPS_STRDUP(manufacturer);
227 WPS_STRDUP(model_name);
228 WPS_STRDUP(model_number);
229 WPS_STRDUP(serial_number);
230#undef WPS_STRDUP
231}
232
233
234int wps_device_store(struct wps_registrar *reg,
235 struct wps_device_data *dev, const u8 *uuid)
236{
237 struct wps_registrar_device *d;
238
239 d = wps_device_get(reg, dev->mac_addr);
240 if (d == NULL) {
241 d = os_zalloc(sizeof(*d));
242 if (d == NULL)
243 return -1;
244 d->next = reg->devices;
245 reg->devices = d;
246 }
247
248 wps_device_clone_data(&d->dev, dev);
249 os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
250
251 return 0;
252}
253
254
255static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
256 const u8 *addr, const u8 *uuid_e)
257{
258 struct wps_pbc_session *pbc, *prev = NULL;
259 struct os_time now;
260
261 os_get_time(&now);
262
263 pbc = reg->pbc_sessions;
264 while (pbc) {
265 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
266 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
267 if (prev)
268 prev->next = pbc->next;
269 else
270 reg->pbc_sessions = pbc->next;
271 break;
272 }
273 prev = pbc;
274 pbc = pbc->next;
275 }
276
277 if (!pbc) {
278 pbc = os_zalloc(sizeof(*pbc));
279 if (pbc == NULL)
280 return;
281 os_memcpy(pbc->addr, addr, ETH_ALEN);
282 if (uuid_e)
283 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
284 }
285
286 pbc->next = reg->pbc_sessions;
287 reg->pbc_sessions = pbc;
288 pbc->timestamp = now;
289
290 /* remove entries that have timed out */
291 prev = pbc;
292 pbc = pbc->next;
293
294 while (pbc) {
295 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
296 prev->next = NULL;
297 wps_free_pbc_sessions(pbc);
298 break;
299 }
300 prev = pbc;
301 pbc = pbc->next;
302 }
303}
304
305
306static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]307 const u8 *uuid_e,
308 const u8 *p2p_dev_addr)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]309{
310 struct wps_pbc_session *pbc, *prev = NULL, *tmp;
311
312 pbc = reg->pbc_sessions;
313 while (pbc) {
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]314 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
Dmitry Shmidt98f9e762012-05-30 11:18:46 -0700[diff] [blame^]315#ifdef ANDROID_P2P
316 (p2p_dev_addr && !is_zero_ether_addr(pbc->addr) &&
317 os_memcmp(pbc->addr, p2p_dev_addr, ETH_ALEN) ==
318#else
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]319 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
320 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
Dmitry Shmidt98f9e762012-05-30 11:18:46 -0700[diff] [blame^]321#endif
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]322 0)) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]323 if (prev)
324 prev->next = pbc->next;
325 else
326 reg->pbc_sessions = pbc->next;
327 tmp = pbc;
328 pbc = pbc->next;
329 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
330 "addr=" MACSTR, MAC2STR(tmp->addr));
331 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
332 tmp->uuid_e, WPS_UUID_LEN);
333 os_free(tmp);
334 continue;
335 }
336 prev = pbc;
337 pbc = pbc->next;
338 }
339}
340
341
342int wps_registrar_pbc_overlap(struct wps_registrar *reg,
343 const u8 *addr, const u8 *uuid_e)
344{
345 int count = 0;
346 struct wps_pbc_session *pbc;
347 struct wps_pbc_session *first = NULL;
348 struct os_time now;
349
350 os_get_time(&now);
351
352 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
353
354 if (uuid_e) {
355 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
356 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
357 uuid_e, WPS_UUID_LEN);
358 count++;
359 }
360
361 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
362 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
363 MAC2STR(pbc->addr));
364 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
365 pbc->uuid_e, WPS_UUID_LEN);
366 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
367 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has "
368 "expired");
369 break;
370 }
371 if (first &&
372 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
373 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
374 continue; /* same Enrollee */
375 }
376 if (uuid_e == NULL ||
377 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
378 wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
379 count++;
380 }
381 if (first == NULL)
382 first = pbc;
383 }
384
385 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
386
387 return count > 1 ? 1 : 0;
388}
389
390
391static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
392{
393 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
394 wps->wps_state);
395 wpabuf_put_be16(msg, ATTR_WPS_STATE);
396 wpabuf_put_be16(msg, 1);
397 wpabuf_put_u8(msg, wps->wps_state);
398 return 0;
399}
400
401
402#ifdef CONFIG_WPS_UPNP
403static void wps_registrar_free_pending_m2(struct wps_context *wps)
404{
405 struct upnp_pending_message *p, *p2, *prev = NULL;
406 p = wps->upnp_msgs;
407 while (p) {
408 if (p->type == WPS_M2 || p->type == WPS_M2D) {
409 if (prev == NULL)
410 wps->upnp_msgs = p->next;
411 else
412 prev->next = p->next;
413 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
414 p2 = p;
415 p = p->next;
416 wpabuf_free(p2->msg);
417 os_free(p2);
418 continue;
419 }
420 prev = p;
421 p = p->next;
422 }
423}
424#endif /* CONFIG_WPS_UPNP */
425
426
427static int wps_build_ap_setup_locked(struct wps_context *wps,
428 struct wpabuf *msg)
429{
430 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
431 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
432 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
433 wpabuf_put_be16(msg, 1);
434 wpabuf_put_u8(msg, 1);
435 }
436 return 0;
437}
438
439
440static int wps_build_selected_registrar(struct wps_registrar *reg,
441 struct wpabuf *msg)
442{
443 if (!reg->sel_reg_union)
444 return 0;
445 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
446 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
447 wpabuf_put_be16(msg, 1);
448 wpabuf_put_u8(msg, 1);
449 return 0;
450}
451
452
453static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
454 struct wpabuf *msg)
455{
456 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
457 if (!reg->sel_reg_union)
458 return 0;
459 if (reg->sel_reg_dev_password_id_override >= 0)
460 id = reg->sel_reg_dev_password_id_override;
461 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
462 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
463 wpabuf_put_be16(msg, 2);
464 wpabuf_put_be16(msg, id);
465 return 0;
466}
467
468
469static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
470 struct wpabuf *msg)
471{
472 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
473 if (!reg->sel_reg_union)
474 return 0;
475 if (reg->sel_reg_dev_password_id_override >= 0)
476 id = reg->sel_reg_dev_password_id_override;
477 if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
478 return 0;
479 return wps_build_uuid_e(msg, reg->wps->uuid);
480}
481
482
483static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
484{
485 *methods |= WPS_CONFIG_PUSHBUTTON;
486#ifdef CONFIG_WPS2
487 if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON)
488 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
489 if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON)
490 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]491 if (!(*methods & (WPS_CONFIG_VIRT_PUSHBUTTON |
492 WPS_CONFIG_PHY_PUSHBUTTON))) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]493 /*
494 * Required to include virtual/physical flag, but we were not
495 * configured with push button type, so have to default to one
496 * of them.
497 */
498 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
499 }
500#endif /* CONFIG_WPS2 */
501}
502
503
504static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
505 struct wpabuf *msg)
506{
507 u16 methods;
508 if (!reg->sel_reg_union)
509 return 0;
510 methods = reg->wps->config_methods;
511 methods &= ~WPS_CONFIG_PUSHBUTTON;
512#ifdef CONFIG_WPS2
513 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
514 WPS_CONFIG_PHY_PUSHBUTTON);
515#endif /* CONFIG_WPS2 */
516 if (reg->pbc)
517 wps_set_pushbutton(&methods, reg->wps->config_methods);
518 if (reg->sel_reg_config_methods_override >= 0)
519 methods = reg->sel_reg_config_methods_override;
520 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
521 methods);
522 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
523 wpabuf_put_be16(msg, 2);
524 wpabuf_put_be16(msg, methods);
525 return 0;
526}
527
528
529static int wps_build_probe_config_methods(struct wps_registrar *reg,
530 struct wpabuf *msg)
531{
532 u16 methods;
533 /*
534 * These are the methods that the AP supports as an Enrollee for adding
535 * external Registrars.
536 */
537 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
538#ifdef CONFIG_WPS2
539 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
540 WPS_CONFIG_PHY_PUSHBUTTON);
541#endif /* CONFIG_WPS2 */
542 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
543 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
544 wpabuf_put_be16(msg, 2);
545 wpabuf_put_be16(msg, methods);
546 return 0;
547}
548
549
550static int wps_build_config_methods_r(struct wps_registrar *reg,
551 struct wpabuf *msg)
552{
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]553 return wps_build_config_methods(msg, reg->wps->config_methods);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]554}
555
556
557const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
558{
559 *count = 0;
560
561#ifdef CONFIG_WPS2
562 while (*count < WPS_MAX_AUTHORIZED_MACS) {
563 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
564 break;
565 (*count)++;
566 }
567#endif /* CONFIG_WPS2 */
568
569 return (const u8 *) reg->authorized_macs_union;
570}
571
572
573/**
574 * wps_registrar_init - Initialize WPS Registrar data
575 * @wps: Pointer to longterm WPS context
576 * @cfg: Registrar configuration
577 * Returns: Pointer to allocated Registrar data or %NULL on failure
578 *
579 * This function is used to initialize WPS Registrar functionality. It can be
580 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
581 * runs (e.g., when run as an internal Registrar in an AP). Caller is
582 * responsible for freeing the returned data with wps_registrar_deinit() when
583 * Registrar functionality is not needed anymore.
584 */
585struct wps_registrar *
586wps_registrar_init(struct wps_context *wps,
587 const struct wps_registrar_config *cfg)
588{
589 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
590 if (reg == NULL)
591 return NULL;
592
593 dl_list_init(&reg->pins);
594 reg->wps = wps;
595 reg->new_psk_cb = cfg->new_psk_cb;
596 reg->set_ie_cb = cfg->set_ie_cb;
597 reg->pin_needed_cb = cfg->pin_needed_cb;
598 reg->reg_success_cb = cfg->reg_success_cb;
599 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
600 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
601 reg->cb_ctx = cfg->cb_ctx;
602 reg->skip_cred_build = cfg->skip_cred_build;
603 if (cfg->extra_cred) {
604 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
605 cfg->extra_cred_len);
606 if (reg->extra_cred == NULL) {
607 os_free(reg);
608 return NULL;
609 }
610 }
611 reg->disable_auto_conf = cfg->disable_auto_conf;
612 reg->sel_reg_dev_password_id_override = -1;
613 reg->sel_reg_config_methods_override = -1;
614 reg->static_wep_only = cfg->static_wep_only;
615 reg->dualband = cfg->dualband;
616
617 if (wps_set_ie(reg)) {
618 wps_registrar_deinit(reg);
619 return NULL;
620 }
621
622 return reg;
623}
624
625
626/**
627 * wps_registrar_deinit - Deinitialize WPS Registrar data
628 * @reg: Registrar data from wps_registrar_init()
629 */
630void wps_registrar_deinit(struct wps_registrar *reg)
631{
632 if (reg == NULL)
633 return;
634 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
635 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
636 wps_free_pins(&reg->pins);
637 wps_free_pbc_sessions(reg->pbc_sessions);
638 wpabuf_free(reg->extra_cred);
639 wps_free_devices(reg->devices);
640 os_free(reg);
641}
642
643
644/**
645 * wps_registrar_add_pin - Configure a new PIN for Registrar
646 * @reg: Registrar data from wps_registrar_init()
647 * @addr: Enrollee MAC address or %NULL if not known
648 * @uuid: UUID-E or %NULL for wildcard (any UUID)
649 * @pin: PIN (Device Password)
650 * @pin_len: Length of pin in octets
651 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
652 * Returns: 0 on success, -1 on failure
653 */
654int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
655 const u8 *uuid, const u8 *pin, size_t pin_len,
656 int timeout)
657{
658 struct wps_uuid_pin *p;
659
660 p = os_zalloc(sizeof(*p));
661 if (p == NULL)
662 return -1;
663 if (addr)
664 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
665 if (uuid == NULL)
666 p->wildcard_uuid = 1;
667 else
668 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
669 p->pin = os_malloc(pin_len);
670 if (p->pin == NULL) {
671 os_free(p);
672 return -1;
673 }
674 os_memcpy(p->pin, pin, pin_len);
675 p->pin_len = pin_len;
676
677 if (timeout) {
678 p->flags |= PIN_EXPIRES;
679 os_get_time(&p->expiration);
680 p->expiration.sec += timeout;
681 }
682
683 dl_list_add(&reg->pins, &p->list);
684
685 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
686 timeout);
687 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
688 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
689 reg->selected_registrar = 1;
690 reg->pbc = 0;
691 if (addr)
692 wps_registrar_add_authorized_mac(reg, addr);
693 else
694 wps_registrar_add_authorized_mac(
695 reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
696 wps_registrar_selected_registrar_changed(reg);
697 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
698 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
699 wps_registrar_set_selected_timeout,
700 reg, NULL);
701
702 return 0;
703}
704
705
706static void wps_registrar_remove_pin(struct wps_registrar *reg,
707 struct wps_uuid_pin *pin)
708{
709 u8 *addr;
710 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
711
712 if (is_zero_ether_addr(pin->enrollee_addr))
713 addr = bcast;
714 else
715 addr = pin->enrollee_addr;
716 wps_registrar_remove_authorized_mac(reg, addr);
717 wps_remove_pin(pin);
718 wps_registrar_selected_registrar_changed(reg);
719}
720
721
722static void wps_registrar_expire_pins(struct wps_registrar *reg)
723{
724 struct wps_uuid_pin *pin, *prev;
725 struct os_time now;
726
727 os_get_time(&now);
728 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
729 {
730 if ((pin->flags & PIN_EXPIRES) &&
731 os_time_before(&pin->expiration, &now)) {
732 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
733 pin->uuid, WPS_UUID_LEN);
734 wps_registrar_remove_pin(reg, pin);
735 }
736 }
737}
738
739
740/**
741 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
742 * @reg: Registrar data from wps_registrar_init()
743 * Returns: 0 on success, -1 if not wildcard PIN is enabled
744 */
745static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg)
746{
747 struct wps_uuid_pin *pin, *prev;
748
749 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
750 {
751 if (pin->wildcard_uuid) {
752 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
753 pin->uuid, WPS_UUID_LEN);
754 wps_registrar_remove_pin(reg, pin);
755 return 0;
756 }
757 }
758
759 return -1;
760}
761
762
763/**
764 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
765 * @reg: Registrar data from wps_registrar_init()
766 * @uuid: UUID-E
767 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
768 */
769int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
770{
771 struct wps_uuid_pin *pin, *prev;
772
773 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
774 {
775 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
776 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
777 pin->uuid, WPS_UUID_LEN);
778 wps_registrar_remove_pin(reg, pin);
779 return 0;
780 }
781 }
782
783 return -1;
784}
785
786
787static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
788 const u8 *uuid, size_t *pin_len)
789{
790 struct wps_uuid_pin *pin, *found = NULL;
791
792 wps_registrar_expire_pins(reg);
793
794 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
795 if (!pin->wildcard_uuid &&
796 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
797 found = pin;
798 break;
799 }
800 }
801
802 if (!found) {
803 /* Check for wildcard UUIDs since none of the UUID-specific
804 * PINs matched */
805 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800[diff] [blame]806 if (pin->wildcard_uuid == 1 ||
807 pin->wildcard_uuid == 2) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]808 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
809 "PIN. Assigned it for this UUID-E");
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800[diff] [blame]810 pin->wildcard_uuid++;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]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) {
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800[diff] [blame]852 if (pin->wildcard_uuid == 3) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]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);
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800[diff] [blame]965 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]966 return 1;
967 } else if (reg->selected_registrar) {
968 /* PIN Method */
969 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
970 wps_registrar_pin_completed(reg);
971 wps_registrar_invalidate_wildcard_pin(reg);
972 return 1;
973 }
974 return 0;
975}
976
977
978/**
979 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
980 * @reg: Registrar data from wps_registrar_init()
981 * @addr: MAC address of the Probe Request sender
982 * @wps_data: WPS IE contents
983 *
984 * This function is called on an AP when a Probe Request with WPS IE is
985 * received. This is used to track PBC mode use and to detect possible overlap
986 * situation with other WPS APs.
987 */
988void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
989 const struct wpabuf *wps_data,
990 int p2p_wildcard)
991{
992 struct wps_parse_attr attr;
993
994 wpa_hexdump_buf(MSG_MSGDUMP,
995 "WPS: Probe Request with WPS data received",
996 wps_data);
997
998 if (wps_parse_msg(wps_data, &attr) < 0)
999 return;
1000
1001 if (attr.config_methods == NULL) {
1002 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1003 "Probe Request");
1004 return;
1005 }
1006
1007 if (attr.dev_password_id == NULL) {
1008 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1009 "in Probe Request");
1010 return;
1011 }
1012
1013 if (reg->enrollee_seen_cb && attr.uuid_e &&
1014 attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1015 char *dev_name = NULL;
1016 if (attr.dev_name) {
1017 dev_name = os_zalloc(attr.dev_name_len + 1);
1018 if (dev_name) {
1019 os_memcpy(dev_name, attr.dev_name,
1020 attr.dev_name_len);
1021 }
1022 }
1023 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1024 attr.primary_dev_type,
1025 WPA_GET_BE16(attr.config_methods),
1026 WPA_GET_BE16(attr.dev_password_id),
1027 *attr.request_type, dev_name);
1028 os_free(dev_name);
1029 }
1030
1031 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1032 return; /* Not PBC */
1033
1034 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1035 MACSTR, MAC2STR(addr));
1036 if (attr.uuid_e == NULL) {
1037 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1038 "UUID-E included");
1039 return;
1040 }
1041 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1042 WPS_UUID_LEN);
1043
1044 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1045 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1046 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1047 reg->force_pbc_overlap = 1;
1048 wps_pbc_overlap_event(reg->wps);
1049 }
1050}
1051
1052
1053static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1054 const u8 *psk, size_t psk_len)
1055{
1056 if (reg->new_psk_cb == NULL)
1057 return 0;
1058
1059 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1060}
1061
1062
1063static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1064 const struct wps_device_data *dev)
1065{
1066 if (reg->pin_needed_cb == NULL)
1067 return;
1068
1069 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1070}
1071
1072
1073static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1074 const u8 *uuid_e)
1075{
1076 if (reg->reg_success_cb == NULL)
1077 return;
1078
1079 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
1080}
1081
1082
1083static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1084 struct wpabuf *probe_resp_ie)
1085{
1086 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1087}
1088
1089
1090static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1091{
1092 u16 methods = 0;
1093 if (reg->set_sel_reg_cb == NULL)
1094 return;
1095
1096 if (reg->selected_registrar) {
1097 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1098#ifdef CONFIG_WPS2
1099 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1100 WPS_CONFIG_PHY_PUSHBUTTON);
1101#endif /* CONFIG_WPS2 */
1102 if (reg->pbc)
1103 wps_set_pushbutton(&methods, reg->wps->config_methods);
1104 }
1105
1106 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1107 "config_methods=0x%x pbc=%d methods=0x%x",
1108 reg->selected_registrar, reg->wps->config_methods,
1109 reg->pbc, methods);
1110
1111 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1112 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1113 methods);
1114}
1115
1116
1117static int wps_set_ie(struct wps_registrar *reg)
1118{
1119 struct wpabuf *beacon;
1120 struct wpabuf *probe;
1121 const u8 *auth_macs;
1122 size_t count;
1123 size_t vendor_len = 0;
1124 int i;
1125
1126 if (reg->set_ie_cb == NULL)
1127 return 0;
1128
1129 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1130 if (reg->wps->dev.vendor_ext[i]) {
1131 vendor_len += 2 + 2;
1132 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1133 }
1134 }
1135
1136 beacon = wpabuf_alloc(400 + vendor_len);
1137 if (beacon == NULL)
1138 return -1;
1139 probe = wpabuf_alloc(500 + vendor_len);
1140 if (probe == NULL) {
1141 wpabuf_free(beacon);
1142 return -1;
1143 }
1144
1145 auth_macs = wps_authorized_macs(reg, &count);
1146
1147 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1148
1149 if (wps_build_version(beacon) ||
1150 wps_build_wps_state(reg->wps, beacon) ||
1151 wps_build_ap_setup_locked(reg->wps, beacon) ||
1152 wps_build_selected_registrar(reg, beacon) ||
1153 wps_build_sel_reg_dev_password_id(reg, beacon) ||
1154 wps_build_sel_reg_config_methods(reg, beacon) ||
1155 wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1156 (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1157 wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1158 wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1159 wpabuf_free(beacon);
1160 wpabuf_free(probe);
1161 return -1;
1162 }
1163
1164#ifdef CONFIG_P2P
1165 if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1166 wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1167 wpabuf_free(beacon);
1168 wpabuf_free(probe);
1169 return -1;
1170 }
1171#endif /* CONFIG_P2P */
1172
1173 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1174
1175 if (wps_build_version(probe) ||
1176 wps_build_wps_state(reg->wps, probe) ||
1177 wps_build_ap_setup_locked(reg->wps, probe) ||
1178 wps_build_selected_registrar(reg, probe) ||
1179 wps_build_sel_reg_dev_password_id(reg, probe) ||
1180 wps_build_sel_reg_config_methods(reg, probe) ||
1181 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1182 WPS_RESP_REGISTRAR) ||
1183 wps_build_uuid_e(probe, reg->wps->uuid) ||
1184 wps_build_device_attrs(&reg->wps->dev, probe) ||
1185 wps_build_probe_config_methods(reg, probe) ||
1186 wps_build_rf_bands(&reg->wps->dev, probe) ||
1187 wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1188 wps_build_vendor_ext(&reg->wps->dev, probe)) {
1189 wpabuf_free(beacon);
1190 wpabuf_free(probe);
1191 return -1;
1192 }
1193
1194 beacon = wps_ie_encapsulate(beacon);
1195 probe = wps_ie_encapsulate(probe);
1196
1197 if (!beacon || !probe) {
1198 wpabuf_free(beacon);
1199 wpabuf_free(probe);
1200 return -1;
1201 }
1202
1203 if (reg->static_wep_only) {
1204 /*
1205 * Windows XP and Vista clients can get confused about
1206 * EAP-Identity/Request when they probe the network with
1207 * EAPOL-Start. In such a case, they may assume the network is
1208 * using IEEE 802.1X and prompt user for a certificate while
1209 * the correct (non-WPS) behavior would be to ask for the
1210 * static WEP key. As a workaround, use Microsoft Provisioning
1211 * IE to advertise that legacy 802.1X is not supported.
1212 */
1213 const u8 ms_wps[7] = {
1214 WLAN_EID_VENDOR_SPECIFIC, 5,
1215 /* Microsoft Provisioning IE (00:50:f2:5) */
1216 0x00, 0x50, 0xf2, 5,
1217 0x00 /* no legacy 802.1X or MS WPS */
1218 };
1219 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1220 "into Beacon/Probe Response frames");
1221 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1222 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1223 }
1224
1225 return wps_cb_set_ie(reg, beacon, probe);
1226}
1227
1228
1229static int wps_get_dev_password(struct wps_data *wps)
1230{
1231 const u8 *pin;
1232 size_t pin_len = 0;
1233
1234 os_free(wps->dev_password);
1235 wps->dev_password = NULL;
1236
1237 if (wps->pbc) {
1238 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1239 pin = (const u8 *) "00000000";
1240 pin_len = 8;
1241 } else {
1242 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1243 &pin_len);
1244 }
1245 if (pin == NULL) {
1246 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1247 "the Enrollee");
1248 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1249 &wps->peer_dev);
1250 return -1;
1251 }
1252
1253 wps->dev_password = os_malloc(pin_len);
1254 if (wps->dev_password == NULL)
1255 return -1;
1256 os_memcpy(wps->dev_password, pin, pin_len);
1257 wps->dev_password_len = pin_len;
1258
1259 return 0;
1260}
1261
1262
1263static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1264{
1265 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1266 wpabuf_put_be16(msg, ATTR_UUID_R);
1267 wpabuf_put_be16(msg, WPS_UUID_LEN);
1268 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1269 return 0;
1270}
1271
1272
1273static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1274{
1275 u8 *hash;
1276 const u8 *addr[4];
1277 size_t len[4];
1278
1279 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1280 return -1;
1281 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1282 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1283 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1284
1285 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1286 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1287 "R-Hash derivation");
1288 return -1;
1289 }
1290
1291 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1292 wpabuf_put_be16(msg, ATTR_R_HASH1);
1293 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1294 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1295 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1296 addr[0] = wps->snonce;
1297 len[0] = WPS_SECRET_NONCE_LEN;
1298 addr[1] = wps->psk1;
1299 len[1] = WPS_PSK_LEN;
1300 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1301 len[2] = wpabuf_len(wps->dh_pubkey_e);
1302 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1303 len[3] = wpabuf_len(wps->dh_pubkey_r);
1304 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1305 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1306
1307 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1308 wpabuf_put_be16(msg, ATTR_R_HASH2);
1309 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1310 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1311 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1312 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1313 addr[1] = wps->psk2;
1314 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1315 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1316
1317 return 0;
1318}
1319
1320
1321static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1322{
1323 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1324 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1325 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1326 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1327 return 0;
1328}
1329
1330
1331static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1332{
1333 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1334 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1335 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1336 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1337 WPS_SECRET_NONCE_LEN);
1338 return 0;
1339}
1340
1341
1342static int wps_build_cred_network_idx(struct wpabuf *msg,
1343 const struct wps_credential *cred)
1344{
1345 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1346 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1347 wpabuf_put_be16(msg, 1);
1348 wpabuf_put_u8(msg, 1);
1349 return 0;
1350}
1351
1352
1353static int wps_build_cred_ssid(struct wpabuf *msg,
1354 const struct wps_credential *cred)
1355{
1356 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1357 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1358 cred->ssid, cred->ssid_len);
1359 wpabuf_put_be16(msg, ATTR_SSID);
1360 wpabuf_put_be16(msg, cred->ssid_len);
1361 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1362 return 0;
1363}
1364
1365
1366static int wps_build_cred_auth_type(struct wpabuf *msg,
1367 const struct wps_credential *cred)
1368{
1369 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1370 cred->auth_type);
1371 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1372 wpabuf_put_be16(msg, 2);
1373 wpabuf_put_be16(msg, cred->auth_type);
1374 return 0;
1375}
1376
1377
1378static int wps_build_cred_encr_type(struct wpabuf *msg,
1379 const struct wps_credential *cred)
1380{
1381 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1382 cred->encr_type);
1383 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1384 wpabuf_put_be16(msg, 2);
1385 wpabuf_put_be16(msg, cred->encr_type);
1386 return 0;
1387}
1388
1389
1390static int wps_build_cred_network_key(struct wpabuf *msg,
1391 const struct wps_credential *cred)
1392{
1393 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1394 (int) cred->key_len);
1395 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1396 cred->key, cred->key_len);
1397 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1398 wpabuf_put_be16(msg, cred->key_len);
1399 wpabuf_put_data(msg, cred->key, cred->key_len);
1400 return 0;
1401}
1402
1403
1404static int wps_build_cred_mac_addr(struct wpabuf *msg,
1405 const struct wps_credential *cred)
1406{
1407 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")",
1408 MAC2STR(cred->mac_addr));
1409 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1410 wpabuf_put_be16(msg, ETH_ALEN);
1411 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1412 return 0;
1413}
1414
1415
1416static int wps_build_credential(struct wpabuf *msg,
1417 const struct wps_credential *cred)
1418{
1419 if (wps_build_cred_network_idx(msg, cred) ||
1420 wps_build_cred_ssid(msg, cred) ||
1421 wps_build_cred_auth_type(msg, cred) ||
1422 wps_build_cred_encr_type(msg, cred) ||
1423 wps_build_cred_network_key(msg, cred) ||
1424 wps_build_cred_mac_addr(msg, cred))
1425 return -1;
1426 return 0;
1427}
1428
1429
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]1430int wps_build_credential_wrap(struct wpabuf *msg,
1431 const struct wps_credential *cred)
1432{
1433 struct wpabuf *wbuf;
1434 wbuf = wpabuf_alloc(200);
1435 if (wbuf == NULL)
1436 return -1;
1437 if (wps_build_credential(wbuf, cred)) {
1438 wpabuf_free(wbuf);
1439 return -1;
1440 }
1441 wpabuf_put_be16(msg, ATTR_CRED);
1442 wpabuf_put_be16(msg, wpabuf_len(wbuf));
1443 wpabuf_put_buf(msg, wbuf);
1444 wpabuf_free(wbuf);
1445 return 0;
1446}
1447
1448
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]1449int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1450{
1451 struct wpabuf *cred;
1452
1453 if (wps->wps->registrar->skip_cred_build)
1454 goto skip_cred_build;
1455
1456 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1457 if (wps->use_cred) {
1458 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1459 goto use_provided;
1460 }
1461 os_memset(&wps->cred, 0, sizeof(wps->cred));
1462
1463 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1464 wps->cred.ssid_len = wps->wps->ssid_len;
1465
1466 /* Select the best authentication and encryption type */
1467 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1468 wps->auth_type = WPS_AUTH_WPA2PSK;
1469 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1470 wps->auth_type = WPS_AUTH_WPAPSK;
1471 else if (wps->auth_type & WPS_AUTH_OPEN)
1472 wps->auth_type = WPS_AUTH_OPEN;
1473 else if (wps->auth_type & WPS_AUTH_SHARED)
1474 wps->auth_type = WPS_AUTH_SHARED;
1475 else {
1476 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1477 wps->auth_type);
1478 return -1;
1479 }
1480 wps->cred.auth_type = wps->auth_type;
1481
1482 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1483 wps->auth_type == WPS_AUTH_WPAPSK) {
1484 if (wps->encr_type & WPS_ENCR_AES)
1485 wps->encr_type = WPS_ENCR_AES;
1486 else if (wps->encr_type & WPS_ENCR_TKIP)
1487 wps->encr_type = WPS_ENCR_TKIP;
1488 else {
1489 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1490 "type for WPA/WPA2");
1491 return -1;
1492 }
1493 } else {
1494 if (wps->encr_type & WPS_ENCR_WEP)
1495 wps->encr_type = WPS_ENCR_WEP;
1496 else if (wps->encr_type & WPS_ENCR_NONE)
1497 wps->encr_type = WPS_ENCR_NONE;
1498 else {
1499 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1500 "type for non-WPA/WPA2 mode");
1501 return -1;
1502 }
1503 }
1504 wps->cred.encr_type = wps->encr_type;
1505 /*
1506 * Set MAC address in the Credential to be the Enrollee's MAC address
1507 */
1508 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1509
1510 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1511 !wps->wps->registrar->disable_auto_conf) {
1512 u8 r[16];
1513 /* Generate a random passphrase */
1514 if (random_get_bytes(r, sizeof(r)) < 0)
1515 return -1;
1516 os_free(wps->new_psk);
1517 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1518 if (wps->new_psk == NULL)
1519 return -1;
1520 wps->new_psk_len--; /* remove newline */
1521 while (wps->new_psk_len &&
1522 wps->new_psk[wps->new_psk_len - 1] == '=')
1523 wps->new_psk_len--;
1524 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1525 wps->new_psk, wps->new_psk_len);
1526 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1527 wps->cred.key_len = wps->new_psk_len;
1528 } else if (wps->use_psk_key && wps->wps->psk_set) {
1529 char hex[65];
1530 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1531 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1532 os_memcpy(wps->cred.key, hex, 32 * 2);
1533 wps->cred.key_len = 32 * 2;
1534 } else if (wps->wps->network_key) {
1535 os_memcpy(wps->cred.key, wps->wps->network_key,
1536 wps->wps->network_key_len);
1537 wps->cred.key_len = wps->wps->network_key_len;
1538 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1539 char hex[65];
1540 /* Generate a random per-device PSK */
1541 os_free(wps->new_psk);
1542 wps->new_psk_len = 32;
1543 wps->new_psk = os_malloc(wps->new_psk_len);
1544 if (wps->new_psk == NULL)
1545 return -1;
1546 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1547 os_free(wps->new_psk);
1548 wps->new_psk = NULL;
1549 return -1;
1550 }
1551 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1552 wps->new_psk, wps->new_psk_len);
1553 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1554 wps->new_psk_len);
1555 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1556 wps->cred.key_len = wps->new_psk_len * 2;
1557 }
1558
1559use_provided:
1560#ifdef CONFIG_WPS_TESTING
1561 if (wps_testing_dummy_cred)
1562 cred = wpabuf_alloc(200);
1563 else
1564 cred = NULL;
1565 if (cred) {
1566 struct wps_credential dummy;
1567 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1568 os_memset(&dummy, 0, sizeof(dummy));
1569 os_memcpy(dummy.ssid, "dummy", 5);
1570 dummy.ssid_len = 5;
1571 dummy.auth_type = WPS_AUTH_WPA2PSK;
1572 dummy.encr_type = WPS_ENCR_AES;
1573 os_memcpy(dummy.key, "dummy psk", 9);
1574 dummy.key_len = 9;
1575 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1576 wps_build_credential(cred, &dummy);
1577 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1578
1579 wpabuf_put_be16(msg, ATTR_CRED);
1580 wpabuf_put_be16(msg, wpabuf_len(cred));
1581 wpabuf_put_buf(msg, cred);
1582
1583 wpabuf_free(cred);
1584 }
1585#endif /* CONFIG_WPS_TESTING */
1586
1587 cred = wpabuf_alloc(200);
1588 if (cred == NULL)
1589 return -1;
1590
1591 if (wps_build_credential(cred, &wps->cred)) {
1592 wpabuf_free(cred);
1593 return -1;
1594 }
1595
1596 wpabuf_put_be16(msg, ATTR_CRED);
1597 wpabuf_put_be16(msg, wpabuf_len(cred));
1598 wpabuf_put_buf(msg, cred);
1599 wpabuf_free(cred);
1600
1601skip_cred_build:
1602 if (wps->wps->registrar->extra_cred) {
1603 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1604 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1605 }
1606
1607 return 0;
1608}
1609
1610
1611static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1612{
1613 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1614
1615 if (wps_build_credential(msg, &wps->cred))
1616 return -1;
1617
1618 return 0;
1619}
1620
1621
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]1622static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1623{
1624 struct wpabuf *msg, *plain;
1625
1626 msg = wpabuf_alloc(1000);
1627 if (msg == NULL)
1628 return NULL;
1629
1630 plain = wpabuf_alloc(200);
1631 if (plain == NULL) {
1632 wpabuf_free(msg);
1633 return NULL;
1634 }
1635
1636 if (wps_build_ap_settings(wps, plain)) {
1637 wpabuf_free(plain);
1638 wpabuf_free(msg);
1639 return NULL;
1640 }
1641
1642 wpabuf_put_be16(msg, ATTR_CRED);
1643 wpabuf_put_be16(msg, wpabuf_len(plain));
1644 wpabuf_put_buf(msg, plain);
1645 wpabuf_free(plain);
1646
1647 return msg;
1648}
1649
1650
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]1651static struct wpabuf * wps_build_m2(struct wps_data *wps)
1652{
1653 struct wpabuf *msg;
1654
1655 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1656 return NULL;
1657 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1658 wps->nonce_r, WPS_NONCE_LEN);
1659 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1660
1661 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1662 msg = wpabuf_alloc(1000);
1663 if (msg == NULL)
1664 return NULL;
1665
1666 if (wps_build_version(msg) ||
1667 wps_build_msg_type(msg, WPS_M2) ||
1668 wps_build_enrollee_nonce(wps, msg) ||
1669 wps_build_registrar_nonce(wps, msg) ||
1670 wps_build_uuid_r(wps, msg) ||
1671 wps_build_public_key(wps, msg) ||
1672 wps_derive_keys(wps) ||
1673 wps_build_auth_type_flags(wps, msg) ||
1674 wps_build_encr_type_flags(wps, msg) ||
1675 wps_build_conn_type_flags(wps, msg) ||
1676 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1677 wps_build_device_attrs(&wps->wps->dev, msg) ||
1678 wps_build_rf_bands(&wps->wps->dev, msg) ||
1679 wps_build_assoc_state(wps, msg) ||
1680 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1681 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1682 wps_build_os_version(&wps->wps->dev, msg) ||
1683 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1684 wps_build_authenticator(wps, msg)) {
1685 wpabuf_free(msg);
1686 return NULL;
1687 }
1688
1689 wps->int_reg = 1;
1690 wps->state = RECV_M3;
1691 return msg;
1692}
1693
1694
1695static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1696{
1697 struct wpabuf *msg;
1698 u16 err = wps->config_error;
1699
1700 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1701 msg = wpabuf_alloc(1000);
1702 if (msg == NULL)
1703 return NULL;
1704
1705 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1706 err == WPS_CFG_NO_ERROR)
1707 err = WPS_CFG_SETUP_LOCKED;
1708
1709 if (wps_build_version(msg) ||
1710 wps_build_msg_type(msg, WPS_M2D) ||
1711 wps_build_enrollee_nonce(wps, msg) ||
1712 wps_build_registrar_nonce(wps, msg) ||
1713 wps_build_uuid_r(wps, msg) ||
1714 wps_build_auth_type_flags(wps, msg) ||
1715 wps_build_encr_type_flags(wps, msg) ||
1716 wps_build_conn_type_flags(wps, msg) ||
1717 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1718 wps_build_device_attrs(&wps->wps->dev, msg) ||
1719 wps_build_rf_bands(&wps->wps->dev, msg) ||
1720 wps_build_assoc_state(wps, msg) ||
1721 wps_build_config_error(msg, err) ||
1722 wps_build_os_version(&wps->wps->dev, msg) ||
1723 wps_build_wfa_ext(msg, 0, NULL, 0)) {
1724 wpabuf_free(msg);
1725 return NULL;
1726 }
1727
1728 wps->state = RECV_M2D_ACK;
1729 return msg;
1730}
1731
1732
1733static struct wpabuf * wps_build_m4(struct wps_data *wps)
1734{
1735 struct wpabuf *msg, *plain;
1736
1737 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1738
1739 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1740
1741 plain = wpabuf_alloc(200);
1742 if (plain == NULL)
1743 return NULL;
1744
1745 msg = wpabuf_alloc(1000);
1746 if (msg == NULL) {
1747 wpabuf_free(plain);
1748 return NULL;
1749 }
1750
1751 if (wps_build_version(msg) ||
1752 wps_build_msg_type(msg, WPS_M4) ||
1753 wps_build_enrollee_nonce(wps, msg) ||
1754 wps_build_r_hash(wps, msg) ||
1755 wps_build_r_snonce1(wps, plain) ||
1756 wps_build_key_wrap_auth(wps, plain) ||
1757 wps_build_encr_settings(wps, msg, plain) ||
1758 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1759 wps_build_authenticator(wps, msg)) {
1760 wpabuf_free(plain);
1761 wpabuf_free(msg);
1762 return NULL;
1763 }
1764 wpabuf_free(plain);
1765
1766 wps->state = RECV_M5;
1767 return msg;
1768}
1769
1770
1771static struct wpabuf * wps_build_m6(struct wps_data *wps)
1772{
1773 struct wpabuf *msg, *plain;
1774
1775 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1776
1777 plain = wpabuf_alloc(200);
1778 if (plain == NULL)
1779 return NULL;
1780
1781 msg = wpabuf_alloc(1000);
1782 if (msg == NULL) {
1783 wpabuf_free(plain);
1784 return NULL;
1785 }
1786
1787 if (wps_build_version(msg) ||
1788 wps_build_msg_type(msg, WPS_M6) ||
1789 wps_build_enrollee_nonce(wps, msg) ||
1790 wps_build_r_snonce2(wps, plain) ||
1791 wps_build_key_wrap_auth(wps, plain) ||
1792 wps_build_encr_settings(wps, msg, plain) ||
1793 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1794 wps_build_authenticator(wps, msg)) {
1795 wpabuf_free(plain);
1796 wpabuf_free(msg);
1797 return NULL;
1798 }
1799 wpabuf_free(plain);
1800
1801 wps->wps_pin_revealed = 1;
1802 wps->state = RECV_M7;
1803 return msg;
1804}
1805
1806
1807static struct wpabuf * wps_build_m8(struct wps_data *wps)
1808{
1809 struct wpabuf *msg, *plain;
1810
1811 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1812
1813 plain = wpabuf_alloc(500);
1814 if (plain == NULL)
1815 return NULL;
1816
1817 msg = wpabuf_alloc(1000);
1818 if (msg == NULL) {
1819 wpabuf_free(plain);
1820 return NULL;
1821 }
1822
1823 if (wps_build_version(msg) ||
1824 wps_build_msg_type(msg, WPS_M8) ||
1825 wps_build_enrollee_nonce(wps, msg) ||
1826 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1827 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1828 wps_build_key_wrap_auth(wps, plain) ||
1829 wps_build_encr_settings(wps, msg, plain) ||
1830 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1831 wps_build_authenticator(wps, msg)) {
1832 wpabuf_free(plain);
1833 wpabuf_free(msg);
1834 return NULL;
1835 }
1836 wpabuf_free(plain);
1837
1838 wps->state = RECV_DONE;
1839 return msg;
1840}
1841
1842
1843struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1844 enum wsc_op_code *op_code)
1845{
1846 struct wpabuf *msg;
1847
1848#ifdef CONFIG_WPS_UPNP
1849 if (!wps->int_reg && wps->wps->wps_upnp) {
1850 struct upnp_pending_message *p, *prev = NULL;
1851 if (wps->ext_reg > 1)
1852 wps_registrar_free_pending_m2(wps->wps);
1853 p = wps->wps->upnp_msgs;
1854 /* TODO: check pending message MAC address */
1855 while (p && p->next) {
1856 prev = p;
1857 p = p->next;
1858 }
1859 if (p) {
1860 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1861 "UPnP");
1862 if (prev)
1863 prev->next = NULL;
1864 else
1865 wps->wps->upnp_msgs = NULL;
1866 msg = p->msg;
1867 switch (p->type) {
1868 case WPS_WSC_ACK:
1869 *op_code = WSC_ACK;
1870 break;
1871 case WPS_WSC_NACK:
1872 *op_code = WSC_NACK;
1873 break;
1874 default:
1875 *op_code = WSC_MSG;
1876 break;
1877 }
1878 os_free(p);
1879 if (wps->ext_reg == 0)
1880 wps->ext_reg = 1;
1881 return msg;
1882 }
1883 }
1884 if (wps->ext_reg) {
1885 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1886 "pending message available");
1887 return NULL;
1888 }
1889#endif /* CONFIG_WPS_UPNP */
1890
1891 switch (wps->state) {
1892 case SEND_M2:
1893 if (wps_get_dev_password(wps) < 0)
1894 msg = wps_build_m2d(wps);
1895 else
1896 msg = wps_build_m2(wps);
1897 *op_code = WSC_MSG;
1898 break;
1899 case SEND_M2D:
1900 msg = wps_build_m2d(wps);
1901 *op_code = WSC_MSG;
1902 break;
1903 case SEND_M4:
1904 msg = wps_build_m4(wps);
1905 *op_code = WSC_MSG;
1906 break;
1907 case SEND_M6:
1908 msg = wps_build_m6(wps);
1909 *op_code = WSC_MSG;
1910 break;
1911 case SEND_M8:
1912 msg = wps_build_m8(wps);
1913 *op_code = WSC_MSG;
1914 break;
1915 case RECV_DONE:
1916 msg = wps_build_wsc_ack(wps);
1917 *op_code = WSC_ACK;
1918 break;
1919 case SEND_WSC_NACK:
1920 msg = wps_build_wsc_nack(wps);
1921 *op_code = WSC_NACK;
1922 break;
1923 default:
1924 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1925 "a message", wps->state);
1926 msg = NULL;
1927 break;
1928 }
1929
1930 if (*op_code == WSC_MSG && msg) {
1931 /* Save a copy of the last message for Authenticator derivation
1932 */
1933 wpabuf_free(wps->last_msg);
1934 wps->last_msg = wpabuf_dup(msg);
1935 }
1936
1937 return msg;
1938}
1939
1940
1941static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1942{
1943 if (e_nonce == NULL) {
1944 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1945 return -1;
1946 }
1947
1948 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1949 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1950 wps->nonce_e, WPS_NONCE_LEN);
1951
1952 return 0;
1953}
1954
1955
1956static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1957{
1958 if (r_nonce == NULL) {
1959 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1960 return -1;
1961 }
1962
1963 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1964 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1965 return -1;
1966 }
1967
1968 return 0;
1969}
1970
1971
1972static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1973{
1974 if (uuid_e == NULL) {
1975 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1976 return -1;
1977 }
1978
1979 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1980 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1981
1982 return 0;
1983}
1984
1985
1986static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1987{
1988 if (pw_id == NULL) {
1989 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1990 return -1;
1991 }
1992
1993 wps->dev_pw_id = WPA_GET_BE16(pw_id);
1994 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1995
1996 return 0;
1997}
1998
1999
2000static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2001{
2002 if (e_hash1 == NULL) {
2003 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2004 return -1;
2005 }
2006
2007 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2008 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2009
2010 return 0;
2011}
2012
2013
2014static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2015{
2016 if (e_hash2 == NULL) {
2017 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2018 return -1;
2019 }
2020
2021 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2022 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2023
2024 return 0;
2025}
2026
2027
2028static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2029{
2030 u8 hash[SHA256_MAC_LEN];
2031 const u8 *addr[4];
2032 size_t len[4];
2033
2034 if (e_snonce1 == NULL) {
2035 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2036 return -1;
2037 }
2038
2039 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2040 WPS_SECRET_NONCE_LEN);
2041
2042 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2043 addr[0] = e_snonce1;
2044 len[0] = WPS_SECRET_NONCE_LEN;
2045 addr[1] = wps->psk1;
2046 len[1] = WPS_PSK_LEN;
2047 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2048 len[2] = wpabuf_len(wps->dh_pubkey_e);
2049 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2050 len[3] = wpabuf_len(wps->dh_pubkey_r);
2051 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2052
2053 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2054 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2055 "not match with the pre-committed value");
2056 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2057 wps_pwd_auth_fail_event(wps->wps, 0, 1);
2058 return -1;
2059 }
2060
2061 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2062 "half of the device password");
2063
2064 return 0;
2065}
2066
2067
2068static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2069{
2070 u8 hash[SHA256_MAC_LEN];
2071 const u8 *addr[4];
2072 size_t len[4];
2073
2074 if (e_snonce2 == NULL) {
2075 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2076 return -1;
2077 }
2078
2079 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2080 WPS_SECRET_NONCE_LEN);
2081
2082 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2083 addr[0] = e_snonce2;
2084 len[0] = WPS_SECRET_NONCE_LEN;
2085 addr[1] = wps->psk2;
2086 len[1] = WPS_PSK_LEN;
2087 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2088 len[2] = wpabuf_len(wps->dh_pubkey_e);
2089 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2090 len[3] = wpabuf_len(wps->dh_pubkey_r);
2091 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2092
2093 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2094 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2095 "not match with the pre-committed value");
2096 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2097 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2098 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2099 return -1;
2100 }
2101
2102 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2103 "half of the device password");
2104 wps->wps_pin_revealed = 0;
2105 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2106
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800[diff] [blame]2107 /*
2108 * In case wildcard PIN is used and WPS handshake succeeds in the first
2109 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2110 * sure the PIN gets invalidated here.
2111 */
2112 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2113
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2114 return 0;
2115}
2116
2117
2118static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2119{
2120 if (mac_addr == NULL) {
2121 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2122 return -1;
2123 }
2124
2125 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2126 MAC2STR(mac_addr));
2127 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2128 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2129
2130 return 0;
2131}
2132
2133
2134static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2135 size_t pk_len)
2136{
2137 if (pk == NULL || pk_len == 0) {
2138 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2139 return -1;
2140 }
2141
2142#ifdef CONFIG_WPS_OOB
2143 if (wps->wps->oob_conf.pubkey_hash != NULL) {
2144 const u8 *addr[1];
2145 u8 hash[WPS_HASH_LEN];
2146
2147 addr[0] = pk;
2148 sha256_vector(1, addr, &pk_len, hash);
2149 if (os_memcmp(hash,
2150 wpabuf_head(wps->wps->oob_conf.pubkey_hash),
2151 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2152 wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
2153 return -1;
2154 }
2155 }
2156#endif /* CONFIG_WPS_OOB */
2157
2158 wpabuf_free(wps->dh_pubkey_e);
2159 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2160 if (wps->dh_pubkey_e == NULL)
2161 return -1;
2162
2163 return 0;
2164}
2165
2166
2167static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2168{
2169 u16 auth_types;
2170
2171 if (auth == NULL) {
2172 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2173 "received");
2174 return -1;
2175 }
2176
2177 auth_types = WPA_GET_BE16(auth);
2178
2179 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2180 auth_types);
2181 wps->auth_type = wps->wps->auth_types & auth_types;
2182 if (wps->auth_type == 0) {
2183 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2184 "authentication types (own 0x%x Enrollee 0x%x)",
2185 wps->wps->auth_types, auth_types);
2186#ifdef WPS_WORKAROUNDS
2187 /*
2188 * Some deployed implementations seem to advertise incorrect
2189 * information in this attribute. For example, Linksys WRT350N
2190 * seems to have a byteorder bug that breaks this negotiation.
2191 * In order to interoperate with existing implementations,
2192 * assume that the Enrollee supports everything we do.
2193 */
2194 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2195 "does not advertise supported authentication types "
2196 "correctly");
2197 wps->auth_type = wps->wps->auth_types;
2198#else /* WPS_WORKAROUNDS */
2199 return -1;
2200#endif /* WPS_WORKAROUNDS */
2201 }
2202
2203 return 0;
2204}
2205
2206
2207static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2208{
2209 u16 encr_types;
2210
2211 if (encr == NULL) {
2212 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2213 "received");
2214 return -1;
2215 }
2216
2217 encr_types = WPA_GET_BE16(encr);
2218
2219 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2220 encr_types);
2221 wps->encr_type = wps->wps->encr_types & encr_types;
2222 if (wps->encr_type == 0) {
2223 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2224 "encryption types (own 0x%x Enrollee 0x%x)",
2225 wps->wps->encr_types, encr_types);
2226#ifdef WPS_WORKAROUNDS
2227 /*
2228 * Some deployed implementations seem to advertise incorrect
2229 * information in this attribute. For example, Linksys WRT350N
2230 * seems to have a byteorder bug that breaks this negotiation.
2231 * In order to interoperate with existing implementations,
2232 * assume that the Enrollee supports everything we do.
2233 */
2234 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2235 "does not advertise supported encryption types "
2236 "correctly");
2237 wps->encr_type = wps->wps->encr_types;
2238#else /* WPS_WORKAROUNDS */
2239 return -1;
2240#endif /* WPS_WORKAROUNDS */
2241 }
2242
2243 return 0;
2244}
2245
2246
2247static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2248{
2249 if (conn == NULL) {
2250 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2251 "received");
2252 return -1;
2253 }
2254
2255 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2256 *conn);
2257
2258 return 0;
2259}
2260
2261
2262static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2263{
2264 u16 m;
2265
2266 if (methods == NULL) {
2267 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2268 return -1;
2269 }
2270
2271 m = WPA_GET_BE16(methods);
2272
2273 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2274 "%s%s%s%s%s%s%s%s%s", m,
2275 m & WPS_CONFIG_USBA ? " [USBA]" : "",
2276 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2277 m & WPS_CONFIG_LABEL ? " [Label]" : "",
2278 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2279 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2280 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2281 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2282 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2283 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2284
2285 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2286 /*
2287 * The Enrollee does not have a display so it is unlikely to be
2288 * able to show the passphrase to a user and as such, could
2289 * benefit from receiving PSK to reduce key derivation time.
2290 */
2291 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2292 "Enrollee not supporting display");
2293 wps->use_psk_key = 1;
2294 }
2295
2296 return 0;
2297}
2298
2299
2300static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2301{
2302 if (state == NULL) {
2303 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2304 "received");
2305 return -1;
2306 }
2307
2308 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2309 *state);
2310
2311 return 0;
2312}
2313
2314
2315static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2316{
2317 u16 a;
2318
2319 if (assoc == NULL) {
2320 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2321 return -1;
2322 }
2323
2324 a = WPA_GET_BE16(assoc);
2325 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2326
2327 return 0;
2328}
2329
2330
2331static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2332{
2333 u16 e;
2334
2335 if (err == NULL) {
2336 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2337 return -1;
2338 }
2339
2340 e = WPA_GET_BE16(err);
2341 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2342
2343 return 0;
2344}
2345
2346
2347static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2348{
2349#ifdef CONFIG_P2P
2350 struct wps_registrar *reg = wps->wps->registrar;
2351
2352 if (is_zero_ether_addr(reg->p2p_dev_addr))
2353 return 1; /* no filtering in use */
2354
2355 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2356 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2357 "filtering for PBC: expected " MACSTR " was "
2358 MACSTR " - indicate PBC session overlap",
2359 MAC2STR(reg->p2p_dev_addr),
2360 MAC2STR(wps->p2p_dev_addr));
2361 return 0;
2362 }
2363#endif /* CONFIG_P2P */
2364 return 1;
2365}
2366
2367
2368static int wps_registrar_skip_overlap(struct wps_data *wps)
2369{
2370#ifdef CONFIG_P2P
2371 struct wps_registrar *reg = wps->wps->registrar;
2372
2373 if (is_zero_ether_addr(reg->p2p_dev_addr))
2374 return 0; /* no specific Enrollee selected */
2375
2376 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2377 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2378 "Enrollee match");
2379 return 1;
2380 }
2381#endif /* CONFIG_P2P */
2382 return 0;
2383}
2384
2385
2386static enum wps_process_res wps_process_m1(struct wps_data *wps,
2387 struct wps_parse_attr *attr)
2388{
2389 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2390
2391 if (wps->state != RECV_M1) {
2392 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2393 "receiving M1", wps->state);
2394 return WPS_FAILURE;
2395 }
2396
2397 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2398 wps_process_mac_addr(wps, attr->mac_addr) ||
2399 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2400 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2401 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2402 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2403 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2404 wps_process_config_methods(wps, attr->config_methods) ||
2405 wps_process_wps_state(wps, attr->wps_state) ||
2406 wps_process_device_attrs(&wps->peer_dev, attr) ||
2407 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2408 wps_process_assoc_state(wps, attr->assoc_state) ||
2409 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2410 wps_process_config_error(wps, attr->config_error) ||
2411 wps_process_os_version(&wps->peer_dev, attr->os_version))
2412 return WPS_FAILURE;
2413
2414 if (wps->dev_pw_id < 0x10 &&
2415 wps->dev_pw_id != DEV_PW_DEFAULT &&
2416 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2417 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2418 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2419 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2420 !wps->wps->registrar->pbc)) {
2421 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2422 wps->dev_pw_id);
2423 wps->state = SEND_M2D;
2424 return WPS_CONTINUE;
2425 }
2426
2427#ifdef CONFIG_WPS_OOB
2428 if (wps->dev_pw_id >= 0x10 &&
2429 wps->dev_pw_id != wps->wps->oob_dev_pw_id) {
2430 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID "
2431 "%d mismatch", wps->dev_pw_id);
2432 wps->state = SEND_M2D;
2433 return WPS_CONTINUE;
2434 }
2435#endif /* CONFIG_WPS_OOB */
2436
2437 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2438 if ((wps->wps->registrar->force_pbc_overlap ||
2439 wps_registrar_pbc_overlap(wps->wps->registrar,
2440 wps->mac_addr_e, wps->uuid_e) ||
2441 !wps_registrar_p2p_dev_addr_match(wps)) &&
2442 !wps_registrar_skip_overlap(wps)) {
2443 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2444 "negotiation");
2445 wps->state = SEND_M2D;
2446 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2447 wps_pbc_overlap_event(wps->wps);
2448 wps_fail_event(wps->wps, WPS_M1,
2449 WPS_CFG_MULTIPLE_PBC_DETECTED,
2450 WPS_EI_NO_ERROR);
2451 wps->wps->registrar->force_pbc_overlap = 1;
2452 return WPS_CONTINUE;
2453 }
2454 wps_registrar_add_pbc_session(wps->wps->registrar,
2455 wps->mac_addr_e, wps->uuid_e);
2456 wps->pbc = 1;
2457 }
2458
2459#ifdef WPS_WORKAROUNDS
2460 /*
2461 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2462 * passphrase format. To avoid interop issues, force PSK format to be
2463 * used.
2464 */
2465 if (!wps->use_psk_key &&
2466 wps->peer_dev.manufacturer &&
2467 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2468 wps->peer_dev.model_name &&
2469 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2470 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2471 "PSK format");
2472 wps->use_psk_key = 1;
2473 }
2474#endif /* WPS_WORKAROUNDS */
2475
2476 wps->state = SEND_M2;
2477 return WPS_CONTINUE;
2478}
2479
2480
2481static enum wps_process_res wps_process_m3(struct wps_data *wps,
2482 const struct wpabuf *msg,
2483 struct wps_parse_attr *attr)
2484{
2485 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2486
2487 if (wps->state != RECV_M3) {
2488 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2489 "receiving M3", wps->state);
2490 wps->state = SEND_WSC_NACK;
2491 return WPS_CONTINUE;
2492 }
2493
2494 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2495 !wps_registrar_skip_overlap(wps)) {
2496 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2497 "session overlap");
2498 wps->state = SEND_WSC_NACK;
2499 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2500 return WPS_CONTINUE;
2501 }
2502
2503 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2504 wps_process_authenticator(wps, attr->authenticator, msg) ||
2505 wps_process_e_hash1(wps, attr->e_hash1) ||
2506 wps_process_e_hash2(wps, attr->e_hash2)) {
2507 wps->state = SEND_WSC_NACK;
2508 return WPS_CONTINUE;
2509 }
2510
2511 wps->state = SEND_M4;
2512 return WPS_CONTINUE;
2513}
2514
2515
2516static enum wps_process_res wps_process_m5(struct wps_data *wps,
2517 const struct wpabuf *msg,
2518 struct wps_parse_attr *attr)
2519{
2520 struct wpabuf *decrypted;
2521 struct wps_parse_attr eattr;
2522
2523 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2524
2525 if (wps->state != RECV_M5) {
2526 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2527 "receiving M5", wps->state);
2528 wps->state = SEND_WSC_NACK;
2529 return WPS_CONTINUE;
2530 }
2531
2532 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2533 !wps_registrar_skip_overlap(wps)) {
2534 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2535 "session overlap");
2536 wps->state = SEND_WSC_NACK;
2537 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2538 return WPS_CONTINUE;
2539 }
2540
2541 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2542 wps_process_authenticator(wps, attr->authenticator, msg)) {
2543 wps->state = SEND_WSC_NACK;
2544 return WPS_CONTINUE;
2545 }
2546
2547 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2548 attr->encr_settings_len);
2549 if (decrypted == NULL) {
2550 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2551 "Settings attribute");
2552 wps->state = SEND_WSC_NACK;
2553 return WPS_CONTINUE;
2554 }
2555
2556 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2557 wpabuf_free(decrypted);
2558 wps->state = SEND_WSC_NACK;
2559 return WPS_CONTINUE;
2560 }
2561
2562 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2563 "attribute");
2564 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2565 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2566 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2567 wpabuf_free(decrypted);
2568 wps->state = SEND_WSC_NACK;
2569 return WPS_CONTINUE;
2570 }
2571 wpabuf_free(decrypted);
2572
2573 wps->state = SEND_M6;
2574 return WPS_CONTINUE;
2575}
2576
2577
2578static void wps_sta_cred_cb(struct wps_data *wps)
2579{
2580 /*
2581 * Update credential to only include a single authentication and
2582 * encryption type in case the AP configuration includes more than one
2583 * option.
2584 */
2585 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2586 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2587 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2588 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2589 if (wps->cred.encr_type & WPS_ENCR_AES)
2590 wps->cred.encr_type = WPS_ENCR_AES;
2591 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2592 wps->cred.encr_type = WPS_ENCR_TKIP;
2593 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2594 "AP configuration");
2595 if (wps->wps->cred_cb)
2596 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2597}
2598
2599
2600static void wps_cred_update(struct wps_credential *dst,
2601 struct wps_credential *src)
2602{
2603 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2604 dst->ssid_len = src->ssid_len;
2605 dst->auth_type = src->auth_type;
2606 dst->encr_type = src->encr_type;
2607 dst->key_idx = src->key_idx;
2608 os_memcpy(dst->key, src->key, sizeof(dst->key));
2609 dst->key_len = src->key_len;
2610}
2611
2612
2613static int wps_process_ap_settings_r(struct wps_data *wps,
2614 struct wps_parse_attr *attr)
2615{
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]2616 struct wpabuf *msg;
2617
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2618 if (wps->wps->ap || wps->er)
2619 return 0;
2620
2621 /* AP Settings Attributes in M7 when Enrollee is an AP */
2622 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2623 return -1;
2624
2625 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2626
2627 if (wps->new_ap_settings) {
2628 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2629 "new settings");
2630 wps_cred_update(&wps->cred, wps->new_ap_settings);
2631 return 0;
2632 } else {
2633 /*
2634 * Use the AP PIN only to receive the current AP settings, not
2635 * to reconfigure the AP.
2636 */
2637
2638 /*
2639 * Clear selected registrar here since we do not get to
2640 * WSC_Done in this protocol run.
2641 */
2642 wps_registrar_pin_completed(wps->wps->registrar);
2643
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]2644 msg = wps_build_ap_cred(wps);
2645 if (msg == NULL)
2646 return -1;
2647 wps->cred.cred_attr = wpabuf_head(msg);
2648 wps->cred.cred_attr_len = wpabuf_len(msg);
2649
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2650 if (wps->ap_settings_cb) {
2651 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2652 &wps->cred);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]2653 wpabuf_free(msg);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2654 return 1;
2655 }
2656 wps_sta_cred_cb(wps);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]2657
2658 wps->cred.cred_attr = NULL;
2659 wps->cred.cred_attr_len = 0;
2660 wpabuf_free(msg);
2661
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]2662 return 1;
2663 }
2664}
2665
2666
2667static enum wps_process_res wps_process_m7(struct wps_data *wps,
2668 const struct wpabuf *msg,
2669 struct wps_parse_attr *attr)
2670{
2671 struct wpabuf *decrypted;
2672 struct wps_parse_attr eattr;
2673
2674 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2675
2676 if (wps->state != RECV_M7) {
2677 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2678 "receiving M7", wps->state);
2679 wps->state = SEND_WSC_NACK;
2680 return WPS_CONTINUE;
2681 }
2682
2683 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2684 !wps_registrar_skip_overlap(wps)) {
2685 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2686 "session overlap");
2687 wps->state = SEND_WSC_NACK;
2688 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2689 return WPS_CONTINUE;
2690 }
2691
2692 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2693 wps_process_authenticator(wps, attr->authenticator, msg)) {
2694 wps->state = SEND_WSC_NACK;
2695 return WPS_CONTINUE;
2696 }
2697
2698 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2699 attr->encr_settings_len);
2700 if (decrypted == NULL) {
2701 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2702 "Settings attribute");
2703 wps->state = SEND_WSC_NACK;
2704 return WPS_CONTINUE;
2705 }
2706
2707 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2708 attr->version2 != NULL) < 0) {
2709 wpabuf_free(decrypted);
2710 wps->state = SEND_WSC_NACK;
2711 return WPS_CONTINUE;
2712 }
2713
2714 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2715 "attribute");
2716 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2717 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2718 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2719 wps_process_ap_settings_r(wps, &eattr)) {
2720 wpabuf_free(decrypted);
2721 wps->state = SEND_WSC_NACK;
2722 return WPS_CONTINUE;
2723 }
2724
2725 wpabuf_free(decrypted);
2726
2727 wps->state = SEND_M8;
2728 return WPS_CONTINUE;
2729}
2730
2731
2732static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2733 const struct wpabuf *msg)
2734{
2735 struct wps_parse_attr attr;
2736 enum wps_process_res ret = WPS_CONTINUE;
2737
2738 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2739
2740 if (wps_parse_msg(msg, &attr) < 0)
2741 return WPS_FAILURE;
2742
2743 if (attr.msg_type == NULL) {
2744 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2745 wps->state = SEND_WSC_NACK;
2746 return WPS_CONTINUE;
2747 }
2748
2749 if (*attr.msg_type != WPS_M1 &&
2750 (attr.registrar_nonce == NULL ||
2751 os_memcmp(wps->nonce_r, attr.registrar_nonce,
2752 WPS_NONCE_LEN != 0))) {
2753 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2754 return WPS_FAILURE;
2755 }
2756
2757 switch (*attr.msg_type) {
2758 case WPS_M1:
2759 if (wps_validate_m1(msg) < 0)
2760 return WPS_FAILURE;
2761#ifdef CONFIG_WPS_UPNP
2762 if (wps->wps->wps_upnp && attr.mac_addr) {
2763 /* Remove old pending messages when starting new run */
2764 wps_free_pending_msgs(wps->wps->upnp_msgs);
2765 wps->wps->upnp_msgs = NULL;
2766
2767 upnp_wps_device_send_wlan_event(
2768 wps->wps->wps_upnp, attr.mac_addr,
2769 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2770 }
2771#endif /* CONFIG_WPS_UPNP */
2772 ret = wps_process_m1(wps, &attr);
2773 break;
2774 case WPS_M3:
2775 if (wps_validate_m3(msg) < 0)
2776 return WPS_FAILURE;
2777 ret = wps_process_m3(wps, msg, &attr);
2778 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2779 wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2780 wps->error_indication);
2781 break;
2782 case WPS_M5:
2783 if (wps_validate_m5(msg) < 0)
2784 return WPS_FAILURE;
2785 ret = wps_process_m5(wps, msg, &attr);
2786 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2787 wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2788 wps->error_indication);
2789 break;
2790 case WPS_M7:
2791 if (wps_validate_m7(msg) < 0)
2792 return WPS_FAILURE;
2793 ret = wps_process_m7(wps, msg, &attr);
2794 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2795 wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2796 wps->error_indication);
2797 break;
2798 default:
2799 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2800 *attr.msg_type);
2801 return WPS_FAILURE;
2802 }
2803
2804 if (ret == WPS_CONTINUE) {
2805 /* Save a copy of the last message for Authenticator derivation
2806 */
2807 wpabuf_free(wps->last_msg);
2808 wps->last_msg = wpabuf_dup(msg);
2809 }
2810
2811 return ret;
2812}
2813
2814
2815static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2816 const struct wpabuf *msg)
2817{
2818 struct wps_parse_attr attr;
2819
2820 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2821
2822 if (wps_parse_msg(msg, &attr) < 0)
2823 return WPS_FAILURE;
2824
2825 if (attr.msg_type == NULL) {
2826 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2827 return WPS_FAILURE;
2828 }
2829
2830 if (*attr.msg_type != WPS_WSC_ACK) {
2831 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2832 *attr.msg_type);
2833 return WPS_FAILURE;
2834 }
2835
2836#ifdef CONFIG_WPS_UPNP
2837 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2838 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2839 if (wps->wps->upnp_msgs)
2840 return WPS_CONTINUE;
2841 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2842 "external Registrar");
2843 return WPS_PENDING;
2844 }
2845#endif /* CONFIG_WPS_UPNP */
2846
2847 if (attr.registrar_nonce == NULL ||
2848 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2849 {
2850 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2851 return WPS_FAILURE;
2852 }
2853
2854 if (attr.enrollee_nonce == NULL ||
2855 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2856 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2857 return WPS_FAILURE;
2858 }
2859
2860 if (wps->state == RECV_M2D_ACK) {
2861#ifdef CONFIG_WPS_UPNP
2862 if (wps->wps->wps_upnp &&
2863 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2864 if (wps->wps->upnp_msgs)
2865 return WPS_CONTINUE;
2866 if (wps->ext_reg == 0)
2867 wps->ext_reg = 1;
2868 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2869 "external Registrar");
2870 return WPS_PENDING;
2871 }
2872#endif /* CONFIG_WPS_UPNP */
2873
2874 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2875 "terminate negotiation");
2876 }
2877
2878 return WPS_FAILURE;
2879}
2880
2881
2882static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2883 const struct wpabuf *msg)
2884{
2885 struct wps_parse_attr attr;
2886 int old_state;
2887 u16 config_error;
2888
2889 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2890
2891 old_state = wps->state;
2892 wps->state = SEND_WSC_NACK;
2893
2894 if (wps_parse_msg(msg, &attr) < 0)
2895 return WPS_FAILURE;
2896
2897 if (attr.msg_type == NULL) {
2898 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2899 return WPS_FAILURE;
2900 }
2901
2902 if (*attr.msg_type != WPS_WSC_NACK) {
2903 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2904 *attr.msg_type);
2905 return WPS_FAILURE;
2906 }
2907
2908#ifdef CONFIG_WPS_UPNP
2909 if (wps->wps->wps_upnp && wps->ext_reg) {
2910 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2911 "Registrar terminated by the Enrollee");
2912 return WPS_FAILURE;
2913 }
2914#endif /* CONFIG_WPS_UPNP */
2915
2916 if (attr.registrar_nonce == NULL ||
2917 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2918 {
2919 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2920 return WPS_FAILURE;
2921 }
2922
2923 if (attr.enrollee_nonce == NULL ||
2924 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2925 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2926 return WPS_FAILURE;
2927 }
2928
2929 if (attr.config_error == NULL) {
2930 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2931 "in WSC_NACK");
2932 return WPS_FAILURE;
2933 }
2934
2935 config_error = WPA_GET_BE16(attr.config_error);
2936 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2937 "Configuration Error %d", config_error);
2938
2939 switch (old_state) {
2940 case RECV_M3:
2941 wps_fail_event(wps->wps, WPS_M2, config_error,
2942 wps->error_indication);
2943 break;
2944 case RECV_M5:
2945 wps_fail_event(wps->wps, WPS_M4, config_error,
2946 wps->error_indication);
2947 break;
2948 case RECV_M7:
2949 wps_fail_event(wps->wps, WPS_M6, config_error,
2950 wps->error_indication);
2951 break;
2952 case RECV_DONE:
2953 wps_fail_event(wps->wps, WPS_M8, config_error,
2954 wps->error_indication);
2955 break;
2956 default:
2957 break;
2958 }
2959
2960 return WPS_FAILURE;
2961}
2962
2963
2964static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2965 const struct wpabuf *msg)
2966{
2967 struct wps_parse_attr attr;
2968
2969 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2970
2971 if (wps->state != RECV_DONE &&
2972 (!wps->wps->wps_upnp || !wps->ext_reg)) {
2973 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2974 "receiving WSC_Done", wps->state);
2975 return WPS_FAILURE;
2976 }
2977
2978 if (wps_parse_msg(msg, &attr) < 0)
2979 return WPS_FAILURE;
2980
2981 if (attr.msg_type == NULL) {
2982 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2983 return WPS_FAILURE;
2984 }
2985
2986 if (*attr.msg_type != WPS_WSC_DONE) {
2987 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2988 *attr.msg_type);
2989 return WPS_FAILURE;
2990 }
2991
2992#ifdef CONFIG_WPS_UPNP
2993 if (wps->wps->wps_upnp && wps->ext_reg) {
2994 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2995 "Registrar completed successfully");
2996 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2997 wps->uuid_e);
2998 return WPS_DONE;
2999 }
3000#endif /* CONFIG_WPS_UPNP */
3001
3002 if (attr.registrar_nonce == NULL ||
3003 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
3004 {
3005 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3006 return WPS_FAILURE;
3007 }
3008
3009 if (attr.enrollee_nonce == NULL ||
3010 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
3011 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3012 return WPS_FAILURE;
3013 }
3014
3015 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3016 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3017 wps->uuid_e);
3018
3019 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3020 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3021 struct wps_credential cred;
3022
3023 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3024 "on first Enrollee connection");
3025
3026 os_memset(&cred, 0, sizeof(cred));
3027 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3028 cred.ssid_len = wps->wps->ssid_len;
3029 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3030 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3031 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3032 cred.key_len = wps->new_psk_len;
3033
3034 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3035 wpa_hexdump_ascii_key(MSG_DEBUG,
3036 "WPS: Generated random passphrase",
3037 wps->new_psk, wps->new_psk_len);
3038 if (wps->wps->cred_cb)
3039 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3040
3041 os_free(wps->new_psk);
3042 wps->new_psk = NULL;
3043 }
3044
3045 if (!wps->wps->ap && !wps->er)
3046 wps_sta_cred_cb(wps);
3047
3048 if (wps->new_psk) {
3049 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3050 wps->new_psk, wps->new_psk_len)) {
3051 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3052 "new PSK");
3053 }
3054 os_free(wps->new_psk);
3055 wps->new_psk = NULL;
3056 }
3057
3058 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
3059
3060 if (wps->pbc) {
3061 wps_registrar_remove_pbc_session(wps->wps->registrar,
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800[diff] [blame]3062 wps->uuid_e,
3063 wps->p2p_dev_addr);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700[diff] [blame]3064 wps_registrar_pbc_completed(wps->wps->registrar);
3065 } else {
3066 wps_registrar_pin_completed(wps->wps->registrar);
3067 }
3068 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3069 * merge them into APs own list.. */
3070
3071 wps_success_event(wps->wps);
3072
3073 return WPS_DONE;
3074}
3075
3076
3077enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3078 enum wsc_op_code op_code,
3079 const struct wpabuf *msg)
3080{
3081 enum wps_process_res ret;
3082
3083 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3084 "op_code=%d)",
3085 (unsigned long) wpabuf_len(msg), op_code);
3086
3087#ifdef CONFIG_WPS_UPNP
3088 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3089 struct wps_parse_attr attr;
3090 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3091 *attr.msg_type == WPS_M3)
3092 wps->ext_reg = 2; /* past M2/M2D phase */
3093 }
3094 if (wps->ext_reg > 1)
3095 wps_registrar_free_pending_m2(wps->wps);
3096 if (wps->wps->wps_upnp && wps->ext_reg &&
3097 wps->wps->upnp_msgs == NULL &&
3098 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3099 {
3100 struct wps_parse_attr attr;
3101 int type;
3102 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3103 type = -1;
3104 else
3105 type = *attr.msg_type;
3106 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3107 " to external Registrar for processing", type);
3108 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3109 wps->mac_addr_e,
3110 UPNP_WPS_WLANEVENT_TYPE_EAP,
3111 msg);
3112 if (op_code == WSC_MSG)
3113 return WPS_PENDING;
3114 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3115 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3116 "external Registrar");
3117 return WPS_CONTINUE;
3118 }
3119#endif /* CONFIG_WPS_UPNP */
3120
3121 switch (op_code) {
3122 case WSC_MSG:
3123 return wps_process_wsc_msg(wps, msg);
3124 case WSC_ACK:
3125 if (wps_validate_wsc_ack(msg) < 0)
3126 return WPS_FAILURE;
3127 return wps_process_wsc_ack(wps, msg);
3128 case WSC_NACK:
3129 if (wps_validate_wsc_nack(msg) < 0)
3130 return WPS_FAILURE;
3131 return wps_process_wsc_nack(wps, msg);
3132 case WSC_Done:
3133 if (wps_validate_wsc_done(msg) < 0)
3134 return WPS_FAILURE;
3135 ret = wps_process_wsc_done(wps, msg);
3136 if (ret == WPS_FAILURE) {
3137 wps->state = SEND_WSC_NACK;
3138 wps_fail_event(wps->wps, WPS_WSC_DONE,
3139 wps->config_error,
3140 wps->error_indication);
3141 }
3142 return ret;
3143 default:
3144 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3145 return WPS_FAILURE;
3146 }
3147}
3148
3149
3150int wps_registrar_update_ie(struct wps_registrar *reg)
3151{
3152 return wps_set_ie(reg);
3153}
3154
3155
3156static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3157 void *timeout_ctx)
3158{
3159 struct wps_registrar *reg = eloop_ctx;
3160
3161 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3162 "unselect internal Registrar");
3163 reg->selected_registrar = 0;
3164 reg->pbc = 0;
3165 wps_registrar_selected_registrar_changed(reg);
3166}
3167
3168
3169#ifdef CONFIG_WPS_UPNP
3170static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3171 struct subscription *s)
3172{
3173 int i, j;
3174 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3175 "config_methods=0x%x)",
3176 s->dev_password_id, s->config_methods);
3177 reg->sel_reg_union = 1;
3178 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3179 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3180 if (reg->sel_reg_config_methods_override == -1)
3181 reg->sel_reg_config_methods_override = 0;
3182 reg->sel_reg_config_methods_override |= s->config_methods;
3183 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3184 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3185 break;
3186 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3187 j++) {
3188 if (is_zero_ether_addr(s->authorized_macs[j]))
3189 break;
3190 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3191 MACSTR, MAC2STR(s->authorized_macs[j]));
3192 os_memcpy(reg->authorized_macs_union[i],
3193 s->authorized_macs[j], ETH_ALEN);
3194 i++;
3195 }
3196 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3197 (u8 *) reg->authorized_macs_union,
3198 sizeof(reg->authorized_macs_union));
3199}
3200#endif /* CONFIG_WPS_UPNP */
3201
3202
3203static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3204{
3205#ifdef CONFIG_WPS_UPNP
3206 struct subscription *s;
3207
3208 if (reg->wps->wps_upnp == NULL)
3209 return;
3210
3211 dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3212 struct subscription, list) {
3213 struct subscr_addr *sa;
3214 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3215 if (sa) {
3216 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3217 inet_ntoa(sa->saddr.sin_addr),
3218 ntohs(sa->saddr.sin_port));
3219 }
3220 if (s->selected_registrar)
3221 wps_registrar_sel_reg_add(reg, s);
3222 else
3223 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3224 "selected");
3225 }
3226#endif /* CONFIG_WPS_UPNP */
3227}
3228
3229
3230/**
3231 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3232 * @reg: Registrar data from wps_registrar_init()
3233 *
3234 * This function is called when selected registrar state changes, e.g., when an
3235 * AP receives a SetSelectedRegistrar UPnP message.
3236 */
3237void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3238{
3239 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3240
3241 reg->sel_reg_union = reg->selected_registrar;
3242 reg->sel_reg_dev_password_id_override = -1;
3243 reg->sel_reg_config_methods_override = -1;
3244 os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3245 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3246 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3247 (u8 *) reg->authorized_macs_union,
3248 sizeof(reg->authorized_macs_union));
3249 if (reg->selected_registrar) {
3250 u16 methods;
3251
3252 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3253#ifdef CONFIG_WPS2
3254 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3255 WPS_CONFIG_PHY_PUSHBUTTON);
3256#endif /* CONFIG_WPS2 */
3257 if (reg->pbc) {
3258 reg->sel_reg_dev_password_id_override =
3259 DEV_PW_PUSHBUTTON;
3260 wps_set_pushbutton(&methods, reg->wps->config_methods);
3261 }
3262 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3263 "(pbc=%d)", reg->pbc);
3264 reg->sel_reg_config_methods_override = methods;
3265 } else
3266 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3267
3268 wps_registrar_sel_reg_union(reg);
3269
3270 wps_set_ie(reg);
3271 wps_cb_set_sel_reg(reg);
3272}
3273
3274
3275int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3276 char *buf, size_t buflen)
3277{
3278 struct wps_registrar_device *d;
3279 int len = 0, ret;
3280 char uuid[40];
3281 char devtype[WPS_DEV_TYPE_BUFSIZE];
3282
3283 d = wps_device_get(reg, addr);
3284 if (d == NULL)
3285 return 0;
3286 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3287 return 0;
3288
3289 ret = os_snprintf(buf + len, buflen - len,
3290 "wpsUuid=%s\n"
3291 "wpsPrimaryDeviceType=%s\n"
3292 "wpsDeviceName=%s\n"
3293 "wpsManufacturer=%s\n"
3294 "wpsModelName=%s\n"
3295 "wpsModelNumber=%s\n"
3296 "wpsSerialNumber=%s\n",
3297 uuid,
3298 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3299 sizeof(devtype)),
3300 d->dev.device_name ? d->dev.device_name : "",
3301 d->dev.manufacturer ? d->dev.manufacturer : "",
3302 d->dev.model_name ? d->dev.model_name : "",
3303 d->dev.model_number ? d->dev.model_number : "",
3304 d->dev.serial_number ? d->dev.serial_number : "");
3305 if (ret < 0 || (size_t) ret >= buflen - len)
3306 return len;
3307 len += ret;
3308
3309 return len;
3310}
3311
3312
3313int wps_registrar_config_ap(struct wps_registrar *reg,
3314 struct wps_credential *cred)
3315{
3316#ifdef CONFIG_WPS2
3317 printf("encr_type=0x%x\n", cred->encr_type);
3318 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3319 WPS_ENCR_AES))) {
3320 if (cred->encr_type & WPS_ENCR_WEP) {
3321 wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3322 "due to WEP configuration");
3323 return -1;
3324 }
3325
3326 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3327 "invalid encr_type 0x%x", cred->encr_type);
3328 return -1;
3329 }
3330
3331 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3332 WPS_ENCR_TKIP) {
3333 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3334 "TKIP+AES");
3335 cred->encr_type |= WPS_ENCR_AES;
3336 }
3337
3338 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3339 WPS_AUTH_WPAPSK) {
3340 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3341 "WPAPSK+WPA2PSK");
3342 cred->auth_type |= WPS_AUTH_WPA2PSK;
3343 }
3344#endif /* CONFIG_WPS2 */
3345
3346 if (reg->wps->cred_cb)
3347 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3348
3349 return -1;
3350}