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Remove the GPL notification from files contributed by Jouni Malinen
[thirdparty/hostap.git] / src / wps / wps_registrar.c
1 /*
2 * Wi-Fi Protected Setup - Registrar
3 * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
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
29 struct 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
43 static void wps_free_pin(struct wps_uuid_pin *pin)
44 {
45 os_free(pin->pin);
46 os_free(pin);
47 }
48
49
50 static void wps_remove_pin(struct wps_uuid_pin *pin)
51 {
52 dl_list_del(&pin->list);
53 wps_free_pin(pin);
54 }
55
56
57 static 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
65 struct 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
73 static 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
85 struct wps_registrar_device {
86 struct wps_registrar_device *next;
87 struct wps_device_data dev;
88 u8 uuid[WPS_UUID_LEN];
89 };
90
91
92 struct 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
137 static int wps_set_ie(struct wps_registrar *reg);
138 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
139 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
140 void *timeout_ctx);
141
142
143 static 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
164 static 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
189 static 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
202 static 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
215 static 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
234 int 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
255 static 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
306 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
307 const u8 *uuid_e,
308 const u8 *p2p_dev_addr)
309 {
310 struct wps_pbc_session *pbc, *prev = NULL, *tmp;
311
312 pbc = reg->pbc_sessions;
313 while (pbc) {
314 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
315 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
316 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
317 0)) {
318 if (prev)
319 prev->next = pbc->next;
320 else
321 reg->pbc_sessions = pbc->next;
322 tmp = pbc;
323 pbc = pbc->next;
324 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
325 "addr=" MACSTR, MAC2STR(tmp->addr));
326 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
327 tmp->uuid_e, WPS_UUID_LEN);
328 os_free(tmp);
329 continue;
330 }
331 prev = pbc;
332 pbc = pbc->next;
333 }
334 }
335
336
337 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
338 const u8 *addr, const u8 *uuid_e)
339 {
340 int count = 0;
341 struct wps_pbc_session *pbc;
342 struct wps_pbc_session *first = NULL;
343 struct os_time now;
344
345 os_get_time(&now);
346
347 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
348
349 if (uuid_e) {
350 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
351 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
352 uuid_e, WPS_UUID_LEN);
353 count++;
354 }
355
356 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
357 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
358 MAC2STR(pbc->addr));
359 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
360 pbc->uuid_e, WPS_UUID_LEN);
361 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
362 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has "
363 "expired");
364 break;
365 }
366 if (first &&
367 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
368 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
369 continue; /* same Enrollee */
370 }
371 if (uuid_e == NULL ||
372 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
373 wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
374 count++;
375 }
376 if (first == NULL)
377 first = pbc;
378 }
379
380 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
381
382 return count > 1 ? 1 : 0;
383 }
384
385
386 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
387 {
388 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
389 wps->wps_state);
390 wpabuf_put_be16(msg, ATTR_WPS_STATE);
391 wpabuf_put_be16(msg, 1);
392 wpabuf_put_u8(msg, wps->wps_state);
393 return 0;
394 }
395
396
397 #ifdef CONFIG_WPS_UPNP
398 static void wps_registrar_free_pending_m2(struct wps_context *wps)
399 {
400 struct upnp_pending_message *p, *p2, *prev = NULL;
401 p = wps->upnp_msgs;
402 while (p) {
403 if (p->type == WPS_M2 || p->type == WPS_M2D) {
404 if (prev == NULL)
405 wps->upnp_msgs = p->next;
406 else
407 prev->next = p->next;
408 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
409 p2 = p;
410 p = p->next;
411 wpabuf_free(p2->msg);
412 os_free(p2);
413 continue;
414 }
415 prev = p;
416 p = p->next;
417 }
418 }
419 #endif /* CONFIG_WPS_UPNP */
420
421
422 static int wps_build_ap_setup_locked(struct wps_context *wps,
423 struct wpabuf *msg)
424 {
425 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
426 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
427 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
428 wpabuf_put_be16(msg, 1);
429 wpabuf_put_u8(msg, 1);
430 }
431 return 0;
432 }
433
434
435 static int wps_build_selected_registrar(struct wps_registrar *reg,
436 struct wpabuf *msg)
437 {
438 if (!reg->sel_reg_union)
439 return 0;
440 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
441 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
442 wpabuf_put_be16(msg, 1);
443 wpabuf_put_u8(msg, 1);
444 return 0;
445 }
446
447
448 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
449 struct wpabuf *msg)
450 {
451 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
452 if (!reg->sel_reg_union)
453 return 0;
454 if (reg->sel_reg_dev_password_id_override >= 0)
455 id = reg->sel_reg_dev_password_id_override;
456 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
457 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
458 wpabuf_put_be16(msg, 2);
459 wpabuf_put_be16(msg, id);
460 return 0;
461 }
462
463
464 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
465 struct wpabuf *msg)
466 {
467 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
468 if (!reg->sel_reg_union)
469 return 0;
470 if (reg->sel_reg_dev_password_id_override >= 0)
471 id = reg->sel_reg_dev_password_id_override;
472 if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
473 return 0;
474 return wps_build_uuid_e(msg, reg->wps->uuid);
475 }
476
477
478 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
479 {
480 *methods |= WPS_CONFIG_PUSHBUTTON;
481 #ifdef CONFIG_WPS2
482 if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON)
483 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
484 if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON)
485 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
486 if (!(*methods & (WPS_CONFIG_VIRT_PUSHBUTTON |
487 WPS_CONFIG_PHY_PUSHBUTTON))) {
488 /*
489 * Required to include virtual/physical flag, but we were not
490 * configured with push button type, so have to default to one
491 * of them.
492 */
493 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
494 }
495 #endif /* CONFIG_WPS2 */
496 }
497
498
499 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
500 struct wpabuf *msg)
501 {
502 u16 methods;
503 if (!reg->sel_reg_union)
504 return 0;
505 methods = reg->wps->config_methods;
506 methods &= ~WPS_CONFIG_PUSHBUTTON;
507 #ifdef CONFIG_WPS2
508 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
509 WPS_CONFIG_PHY_PUSHBUTTON);
510 #endif /* CONFIG_WPS2 */
511 if (reg->pbc)
512 wps_set_pushbutton(&methods, reg->wps->config_methods);
513 if (reg->sel_reg_config_methods_override >= 0)
514 methods = reg->sel_reg_config_methods_override;
515 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
516 methods);
517 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
518 wpabuf_put_be16(msg, 2);
519 wpabuf_put_be16(msg, methods);
520 return 0;
521 }
522
523
524 static int wps_build_probe_config_methods(struct wps_registrar *reg,
525 struct wpabuf *msg)
526 {
527 u16 methods;
528 /*
529 * These are the methods that the AP supports as an Enrollee for adding
530 * external Registrars.
531 */
532 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
533 #ifdef CONFIG_WPS2
534 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
535 WPS_CONFIG_PHY_PUSHBUTTON);
536 #endif /* CONFIG_WPS2 */
537 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
538 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
539 wpabuf_put_be16(msg, 2);
540 wpabuf_put_be16(msg, methods);
541 return 0;
542 }
543
544
545 static int wps_build_config_methods_r(struct wps_registrar *reg,
546 struct wpabuf *msg)
547 {
548 return wps_build_config_methods(msg, reg->wps->config_methods);
549 }
550
551
552 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
553 {
554 *count = 0;
555
556 #ifdef CONFIG_WPS2
557 while (*count < WPS_MAX_AUTHORIZED_MACS) {
558 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
559 break;
560 (*count)++;
561 }
562 #endif /* CONFIG_WPS2 */
563
564 return (const u8 *) reg->authorized_macs_union;
565 }
566
567
568 /**
569 * wps_registrar_init - Initialize WPS Registrar data
570 * @wps: Pointer to longterm WPS context
571 * @cfg: Registrar configuration
572 * Returns: Pointer to allocated Registrar data or %NULL on failure
573 *
574 * This function is used to initialize WPS Registrar functionality. It can be
575 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
576 * runs (e.g., when run as an internal Registrar in an AP). Caller is
577 * responsible for freeing the returned data with wps_registrar_deinit() when
578 * Registrar functionality is not needed anymore.
579 */
580 struct wps_registrar *
581 wps_registrar_init(struct wps_context *wps,
582 const struct wps_registrar_config *cfg)
583 {
584 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
585 if (reg == NULL)
586 return NULL;
587
588 dl_list_init(&reg->pins);
589 reg->wps = wps;
590 reg->new_psk_cb = cfg->new_psk_cb;
591 reg->set_ie_cb = cfg->set_ie_cb;
592 reg->pin_needed_cb = cfg->pin_needed_cb;
593 reg->reg_success_cb = cfg->reg_success_cb;
594 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
595 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
596 reg->cb_ctx = cfg->cb_ctx;
597 reg->skip_cred_build = cfg->skip_cred_build;
598 if (cfg->extra_cred) {
599 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
600 cfg->extra_cred_len);
601 if (reg->extra_cred == NULL) {
602 os_free(reg);
603 return NULL;
604 }
605 }
606 reg->disable_auto_conf = cfg->disable_auto_conf;
607 reg->sel_reg_dev_password_id_override = -1;
608 reg->sel_reg_config_methods_override = -1;
609 reg->static_wep_only = cfg->static_wep_only;
610 reg->dualband = cfg->dualband;
611
612 if (wps_set_ie(reg)) {
613 wps_registrar_deinit(reg);
614 return NULL;
615 }
616
617 return reg;
618 }
619
620
621 /**
622 * wps_registrar_deinit - Deinitialize WPS Registrar data
623 * @reg: Registrar data from wps_registrar_init()
624 */
625 void wps_registrar_deinit(struct wps_registrar *reg)
626 {
627 if (reg == NULL)
628 return;
629 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
630 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
631 wps_free_pins(&reg->pins);
632 wps_free_pbc_sessions(reg->pbc_sessions);
633 wpabuf_free(reg->extra_cred);
634 wps_free_devices(reg->devices);
635 os_free(reg);
636 }
637
638
639 /**
640 * wps_registrar_add_pin - Configure a new PIN for Registrar
641 * @reg: Registrar data from wps_registrar_init()
642 * @addr: Enrollee MAC address or %NULL if not known
643 * @uuid: UUID-E or %NULL for wildcard (any UUID)
644 * @pin: PIN (Device Password)
645 * @pin_len: Length of pin in octets
646 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
647 * Returns: 0 on success, -1 on failure
648 */
649 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
650 const u8 *uuid, const u8 *pin, size_t pin_len,
651 int timeout)
652 {
653 struct wps_uuid_pin *p;
654
655 p = os_zalloc(sizeof(*p));
656 if (p == NULL)
657 return -1;
658 if (addr)
659 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
660 if (uuid == NULL)
661 p->wildcard_uuid = 1;
662 else
663 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
664 p->pin = os_malloc(pin_len);
665 if (p->pin == NULL) {
666 os_free(p);
667 return -1;
668 }
669 os_memcpy(p->pin, pin, pin_len);
670 p->pin_len = pin_len;
671
672 if (timeout) {
673 p->flags |= PIN_EXPIRES;
674 os_get_time(&p->expiration);
675 p->expiration.sec += timeout;
676 }
677
678 dl_list_add(&reg->pins, &p->list);
679
680 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
681 timeout);
682 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
683 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
684 reg->selected_registrar = 1;
685 reg->pbc = 0;
686 if (addr)
687 wps_registrar_add_authorized_mac(reg, addr);
688 else
689 wps_registrar_add_authorized_mac(
690 reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
691 wps_registrar_selected_registrar_changed(reg);
692 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
693 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
694 wps_registrar_set_selected_timeout,
695 reg, NULL);
696
697 return 0;
698 }
699
700
701 static void wps_registrar_remove_pin(struct wps_registrar *reg,
702 struct wps_uuid_pin *pin)
703 {
704 u8 *addr;
705 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
706
707 if (is_zero_ether_addr(pin->enrollee_addr))
708 addr = bcast;
709 else
710 addr = pin->enrollee_addr;
711 wps_registrar_remove_authorized_mac(reg, addr);
712 wps_remove_pin(pin);
713 wps_registrar_selected_registrar_changed(reg);
714 }
715
716
717 static void wps_registrar_expire_pins(struct wps_registrar *reg)
718 {
719 struct wps_uuid_pin *pin, *prev;
720 struct os_time now;
721
722 os_get_time(&now);
723 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
724 {
725 if ((pin->flags & PIN_EXPIRES) &&
726 os_time_before(&pin->expiration, &now)) {
727 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
728 pin->uuid, WPS_UUID_LEN);
729 wps_registrar_remove_pin(reg, pin);
730 }
731 }
732 }
733
734
735 /**
736 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
737 * @reg: Registrar data from wps_registrar_init()
738 * Returns: 0 on success, -1 if not wildcard PIN is enabled
739 */
740 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg)
741 {
742 struct wps_uuid_pin *pin, *prev;
743
744 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
745 {
746 if (pin->wildcard_uuid) {
747 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
748 pin->uuid, WPS_UUID_LEN);
749 wps_registrar_remove_pin(reg, pin);
750 return 0;
751 }
752 }
753
754 return -1;
755 }
756
757
758 /**
759 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
760 * @reg: Registrar data from wps_registrar_init()
761 * @uuid: UUID-E
762 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
763 */
764 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
765 {
766 struct wps_uuid_pin *pin, *prev;
767
768 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
769 {
770 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
771 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
772 pin->uuid, WPS_UUID_LEN);
773 wps_registrar_remove_pin(reg, pin);
774 return 0;
775 }
776 }
777
778 return -1;
779 }
780
781
782 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
783 const u8 *uuid, size_t *pin_len)
784 {
785 struct wps_uuid_pin *pin, *found = NULL;
786
787 wps_registrar_expire_pins(reg);
788
789 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
790 if (!pin->wildcard_uuid &&
791 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
792 found = pin;
793 break;
794 }
795 }
796
797 if (!found) {
798 /* Check for wildcard UUIDs since none of the UUID-specific
799 * PINs matched */
800 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
801 if (pin->wildcard_uuid == 1 ||
802 pin->wildcard_uuid == 2) {
803 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
804 "PIN. Assigned it for this UUID-E");
805 pin->wildcard_uuid++;
806 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
807 found = pin;
808 break;
809 }
810 }
811 }
812
813 if (!found)
814 return NULL;
815
816 /*
817 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
818 * that could otherwise avoid PIN invalidations.
819 */
820 if (found->flags & PIN_LOCKED) {
821 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
822 "allow concurrent re-use");
823 return NULL;
824 }
825 *pin_len = found->pin_len;
826 found->flags |= PIN_LOCKED;
827 return found->pin;
828 }
829
830
831 /**
832 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
833 * @reg: Registrar data from wps_registrar_init()
834 * @uuid: UUID-E
835 * Returns: 0 on success, -1 on failure
836 *
837 * PINs are locked to enforce only one concurrent use. This function unlocks a
838 * PIN to allow it to be used again. If the specified PIN was configured using
839 * a wildcard UUID, it will be removed instead of allowing multiple uses.
840 */
841 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
842 {
843 struct wps_uuid_pin *pin;
844
845 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
846 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
847 if (pin->wildcard_uuid == 3) {
848 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
849 "wildcard PIN");
850 return wps_registrar_invalidate_pin(reg, uuid);
851 }
852 pin->flags &= ~PIN_LOCKED;
853 return 0;
854 }
855 }
856
857 return -1;
858 }
859
860
861 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
862 {
863 reg->selected_registrar = 0;
864 reg->pbc = 0;
865 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
866 wps_registrar_remove_authorized_mac(reg,
867 (u8 *) "\xff\xff\xff\xff\xff\xff");
868 wps_registrar_selected_registrar_changed(reg);
869 }
870
871
872 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
873 {
874 struct wps_registrar *reg = eloop_ctx;
875
876 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
877 wps_pbc_timeout_event(reg->wps);
878 wps_registrar_stop_pbc(reg);
879 }
880
881
882 /**
883 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
884 * @reg: Registrar data from wps_registrar_init()
885 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
886 * indicates no such filtering
887 * Returns: 0 on success, -1 on failure, -2 on session overlap
888 *
889 * This function is called on an AP when a push button is pushed to activate
890 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
891 * or when a PBC registration is completed. If more than one Enrollee in active
892 * PBC mode has been detected during the monitor time (previous 2 minutes), the
893 * PBC mode is not activated and -2 is returned to indicate session overlap.
894 * This is skipped if a specific Enrollee is selected.
895 */
896 int wps_registrar_button_pushed(struct wps_registrar *reg,
897 const u8 *p2p_dev_addr)
898 {
899 if (p2p_dev_addr == NULL &&
900 wps_registrar_pbc_overlap(reg, NULL, NULL)) {
901 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
902 "mode");
903 wps_pbc_overlap_event(reg->wps);
904 return -2;
905 }
906 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
907 reg->force_pbc_overlap = 0;
908 reg->selected_registrar = 1;
909 reg->pbc = 1;
910 if (p2p_dev_addr)
911 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
912 else
913 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
914 wps_registrar_add_authorized_mac(reg,
915 (u8 *) "\xff\xff\xff\xff\xff\xff");
916 wps_registrar_selected_registrar_changed(reg);
917
918 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
919 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
920 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
921 reg, NULL);
922 return 0;
923 }
924
925
926 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
927 {
928 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
929 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
930 wps_registrar_stop_pbc(reg);
931 }
932
933
934 static void wps_registrar_pin_completed(struct wps_registrar *reg)
935 {
936 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
937 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
938 reg->selected_registrar = 0;
939 wps_registrar_selected_registrar_changed(reg);
940 }
941
942
943 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e)
944 {
945 if (registrar->pbc) {
946 wps_registrar_remove_pbc_session(registrar,
947 uuid_e, NULL);
948 wps_registrar_pbc_completed(registrar);
949 } else {
950 wps_registrar_pin_completed(registrar);
951 }
952 }
953
954
955 int wps_registrar_wps_cancel(struct wps_registrar *reg)
956 {
957 if (reg->pbc) {
958 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
959 wps_registrar_pbc_timeout(reg, NULL);
960 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
961 return 1;
962 } else if (reg->selected_registrar) {
963 /* PIN Method */
964 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
965 wps_registrar_pin_completed(reg);
966 wps_registrar_invalidate_wildcard_pin(reg);
967 return 1;
968 }
969 return 0;
970 }
971
972
973 /**
974 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
975 * @reg: Registrar data from wps_registrar_init()
976 * @addr: MAC address of the Probe Request sender
977 * @wps_data: WPS IE contents
978 *
979 * This function is called on an AP when a Probe Request with WPS IE is
980 * received. This is used to track PBC mode use and to detect possible overlap
981 * situation with other WPS APs.
982 */
983 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
984 const struct wpabuf *wps_data,
985 int p2p_wildcard)
986 {
987 struct wps_parse_attr attr;
988
989 wpa_hexdump_buf(MSG_MSGDUMP,
990 "WPS: Probe Request with WPS data received",
991 wps_data);
992
993 if (wps_parse_msg(wps_data, &attr) < 0)
994 return;
995
996 if (attr.config_methods == NULL) {
997 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
998 "Probe Request");
999 return;
1000 }
1001
1002 if (attr.dev_password_id == NULL) {
1003 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1004 "in Probe Request");
1005 return;
1006 }
1007
1008 if (reg->enrollee_seen_cb && attr.uuid_e &&
1009 attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1010 char *dev_name = NULL;
1011 if (attr.dev_name) {
1012 dev_name = os_zalloc(attr.dev_name_len + 1);
1013 if (dev_name) {
1014 os_memcpy(dev_name, attr.dev_name,
1015 attr.dev_name_len);
1016 }
1017 }
1018 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1019 attr.primary_dev_type,
1020 WPA_GET_BE16(attr.config_methods),
1021 WPA_GET_BE16(attr.dev_password_id),
1022 *attr.request_type, dev_name);
1023 os_free(dev_name);
1024 }
1025
1026 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1027 return; /* Not PBC */
1028
1029 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1030 MACSTR, MAC2STR(addr));
1031 if (attr.uuid_e == NULL) {
1032 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1033 "UUID-E included");
1034 return;
1035 }
1036 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1037 WPS_UUID_LEN);
1038
1039 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1040 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1041 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1042 reg->force_pbc_overlap = 1;
1043 wps_pbc_overlap_event(reg->wps);
1044 }
1045 }
1046
1047
1048 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1049 const u8 *psk, size_t psk_len)
1050 {
1051 if (reg->new_psk_cb == NULL)
1052 return 0;
1053
1054 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1055 }
1056
1057
1058 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1059 const struct wps_device_data *dev)
1060 {
1061 if (reg->pin_needed_cb == NULL)
1062 return;
1063
1064 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1065 }
1066
1067
1068 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1069 const u8 *uuid_e)
1070 {
1071 if (reg->reg_success_cb == NULL)
1072 return;
1073
1074 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e);
1075 }
1076
1077
1078 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1079 struct wpabuf *probe_resp_ie)
1080 {
1081 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1082 }
1083
1084
1085 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1086 {
1087 u16 methods = 0;
1088 if (reg->set_sel_reg_cb == NULL)
1089 return;
1090
1091 if (reg->selected_registrar) {
1092 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1093 #ifdef CONFIG_WPS2
1094 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1095 WPS_CONFIG_PHY_PUSHBUTTON);
1096 #endif /* CONFIG_WPS2 */
1097 if (reg->pbc)
1098 wps_set_pushbutton(&methods, reg->wps->config_methods);
1099 }
1100
1101 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1102 "config_methods=0x%x pbc=%d methods=0x%x",
1103 reg->selected_registrar, reg->wps->config_methods,
1104 reg->pbc, methods);
1105
1106 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1107 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1108 methods);
1109 }
1110
1111
1112 static int wps_set_ie(struct wps_registrar *reg)
1113 {
1114 struct wpabuf *beacon;
1115 struct wpabuf *probe;
1116 const u8 *auth_macs;
1117 size_t count;
1118 size_t vendor_len = 0;
1119 int i;
1120
1121 if (reg->set_ie_cb == NULL)
1122 return 0;
1123
1124 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1125 if (reg->wps->dev.vendor_ext[i]) {
1126 vendor_len += 2 + 2;
1127 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1128 }
1129 }
1130
1131 beacon = wpabuf_alloc(400 + vendor_len);
1132 if (beacon == NULL)
1133 return -1;
1134 probe = wpabuf_alloc(500 + vendor_len);
1135 if (probe == NULL) {
1136 wpabuf_free(beacon);
1137 return -1;
1138 }
1139
1140 auth_macs = wps_authorized_macs(reg, &count);
1141
1142 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1143
1144 if (wps_build_version(beacon) ||
1145 wps_build_wps_state(reg->wps, beacon) ||
1146 wps_build_ap_setup_locked(reg->wps, beacon) ||
1147 wps_build_selected_registrar(reg, beacon) ||
1148 wps_build_sel_reg_dev_password_id(reg, beacon) ||
1149 wps_build_sel_reg_config_methods(reg, beacon) ||
1150 wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1151 (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1152 wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1153 wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1154 wpabuf_free(beacon);
1155 wpabuf_free(probe);
1156 return -1;
1157 }
1158
1159 #ifdef CONFIG_P2P
1160 if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1161 wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1162 wpabuf_free(beacon);
1163 wpabuf_free(probe);
1164 return -1;
1165 }
1166 #endif /* CONFIG_P2P */
1167
1168 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1169
1170 if (wps_build_version(probe) ||
1171 wps_build_wps_state(reg->wps, probe) ||
1172 wps_build_ap_setup_locked(reg->wps, probe) ||
1173 wps_build_selected_registrar(reg, probe) ||
1174 wps_build_sel_reg_dev_password_id(reg, probe) ||
1175 wps_build_sel_reg_config_methods(reg, probe) ||
1176 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1177 WPS_RESP_REGISTRAR) ||
1178 wps_build_uuid_e(probe, reg->wps->uuid) ||
1179 wps_build_device_attrs(&reg->wps->dev, probe) ||
1180 wps_build_probe_config_methods(reg, probe) ||
1181 wps_build_rf_bands(&reg->wps->dev, probe) ||
1182 wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1183 wps_build_vendor_ext(&reg->wps->dev, probe)) {
1184 wpabuf_free(beacon);
1185 wpabuf_free(probe);
1186 return -1;
1187 }
1188
1189 beacon = wps_ie_encapsulate(beacon);
1190 probe = wps_ie_encapsulate(probe);
1191
1192 if (!beacon || !probe) {
1193 wpabuf_free(beacon);
1194 wpabuf_free(probe);
1195 return -1;
1196 }
1197
1198 if (reg->static_wep_only) {
1199 /*
1200 * Windows XP and Vista clients can get confused about
1201 * EAP-Identity/Request when they probe the network with
1202 * EAPOL-Start. In such a case, they may assume the network is
1203 * using IEEE 802.1X and prompt user for a certificate while
1204 * the correct (non-WPS) behavior would be to ask for the
1205 * static WEP key. As a workaround, use Microsoft Provisioning
1206 * IE to advertise that legacy 802.1X is not supported.
1207 */
1208 const u8 ms_wps[7] = {
1209 WLAN_EID_VENDOR_SPECIFIC, 5,
1210 /* Microsoft Provisioning IE (00:50:f2:5) */
1211 0x00, 0x50, 0xf2, 5,
1212 0x00 /* no legacy 802.1X or MS WPS */
1213 };
1214 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1215 "into Beacon/Probe Response frames");
1216 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1217 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1218 }
1219
1220 return wps_cb_set_ie(reg, beacon, probe);
1221 }
1222
1223
1224 static int wps_get_dev_password(struct wps_data *wps)
1225 {
1226 const u8 *pin;
1227 size_t pin_len = 0;
1228
1229 os_free(wps->dev_password);
1230 wps->dev_password = NULL;
1231
1232 if (wps->pbc) {
1233 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1234 pin = (const u8 *) "00000000";
1235 pin_len = 8;
1236 } else {
1237 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1238 &pin_len);
1239 }
1240 if (pin == NULL) {
1241 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1242 "the Enrollee");
1243 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1244 &wps->peer_dev);
1245 return -1;
1246 }
1247
1248 wps->dev_password = os_malloc(pin_len);
1249 if (wps->dev_password == NULL)
1250 return -1;
1251 os_memcpy(wps->dev_password, pin, pin_len);
1252 wps->dev_password_len = pin_len;
1253
1254 return 0;
1255 }
1256
1257
1258 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1259 {
1260 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1261 wpabuf_put_be16(msg, ATTR_UUID_R);
1262 wpabuf_put_be16(msg, WPS_UUID_LEN);
1263 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1264 return 0;
1265 }
1266
1267
1268 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1269 {
1270 u8 *hash;
1271 const u8 *addr[4];
1272 size_t len[4];
1273
1274 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1275 return -1;
1276 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1277 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1278 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1279
1280 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1281 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1282 "R-Hash derivation");
1283 return -1;
1284 }
1285
1286 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1287 wpabuf_put_be16(msg, ATTR_R_HASH1);
1288 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1289 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1290 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1291 addr[0] = wps->snonce;
1292 len[0] = WPS_SECRET_NONCE_LEN;
1293 addr[1] = wps->psk1;
1294 len[1] = WPS_PSK_LEN;
1295 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1296 len[2] = wpabuf_len(wps->dh_pubkey_e);
1297 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1298 len[3] = wpabuf_len(wps->dh_pubkey_r);
1299 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1300 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1301
1302 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1303 wpabuf_put_be16(msg, ATTR_R_HASH2);
1304 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1305 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1306 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1307 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1308 addr[1] = wps->psk2;
1309 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1310 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1311
1312 return 0;
1313 }
1314
1315
1316 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1317 {
1318 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1319 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1320 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1321 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1322 return 0;
1323 }
1324
1325
1326 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1327 {
1328 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1329 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1330 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1331 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1332 WPS_SECRET_NONCE_LEN);
1333 return 0;
1334 }
1335
1336
1337 static int wps_build_cred_network_idx(struct wpabuf *msg,
1338 const struct wps_credential *cred)
1339 {
1340 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1341 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1342 wpabuf_put_be16(msg, 1);
1343 wpabuf_put_u8(msg, 1);
1344 return 0;
1345 }
1346
1347
1348 static int wps_build_cred_ssid(struct wpabuf *msg,
1349 const struct wps_credential *cred)
1350 {
1351 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1352 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1353 cred->ssid, cred->ssid_len);
1354 wpabuf_put_be16(msg, ATTR_SSID);
1355 wpabuf_put_be16(msg, cred->ssid_len);
1356 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1357 return 0;
1358 }
1359
1360
1361 static int wps_build_cred_auth_type(struct wpabuf *msg,
1362 const struct wps_credential *cred)
1363 {
1364 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1365 cred->auth_type);
1366 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1367 wpabuf_put_be16(msg, 2);
1368 wpabuf_put_be16(msg, cred->auth_type);
1369 return 0;
1370 }
1371
1372
1373 static int wps_build_cred_encr_type(struct wpabuf *msg,
1374 const struct wps_credential *cred)
1375 {
1376 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1377 cred->encr_type);
1378 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1379 wpabuf_put_be16(msg, 2);
1380 wpabuf_put_be16(msg, cred->encr_type);
1381 return 0;
1382 }
1383
1384
1385 static int wps_build_cred_network_key(struct wpabuf *msg,
1386 const struct wps_credential *cred)
1387 {
1388 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1389 (int) cred->key_len);
1390 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1391 cred->key, cred->key_len);
1392 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1393 wpabuf_put_be16(msg, cred->key_len);
1394 wpabuf_put_data(msg, cred->key, cred->key_len);
1395 return 0;
1396 }
1397
1398
1399 static int wps_build_cred_mac_addr(struct wpabuf *msg,
1400 const struct wps_credential *cred)
1401 {
1402 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")",
1403 MAC2STR(cred->mac_addr));
1404 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1405 wpabuf_put_be16(msg, ETH_ALEN);
1406 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1407 return 0;
1408 }
1409
1410
1411 static int wps_build_credential(struct wpabuf *msg,
1412 const struct wps_credential *cred)
1413 {
1414 if (wps_build_cred_network_idx(msg, cred) ||
1415 wps_build_cred_ssid(msg, cred) ||
1416 wps_build_cred_auth_type(msg, cred) ||
1417 wps_build_cred_encr_type(msg, cred) ||
1418 wps_build_cred_network_key(msg, cred) ||
1419 wps_build_cred_mac_addr(msg, cred))
1420 return -1;
1421 return 0;
1422 }
1423
1424
1425 int wps_build_credential_wrap(struct wpabuf *msg,
1426 const struct wps_credential *cred)
1427 {
1428 struct wpabuf *wbuf;
1429 wbuf = wpabuf_alloc(200);
1430 if (wbuf == NULL)
1431 return -1;
1432 if (wps_build_credential(wbuf, cred)) {
1433 wpabuf_free(wbuf);
1434 return -1;
1435 }
1436 wpabuf_put_be16(msg, ATTR_CRED);
1437 wpabuf_put_be16(msg, wpabuf_len(wbuf));
1438 wpabuf_put_buf(msg, wbuf);
1439 wpabuf_free(wbuf);
1440 return 0;
1441 }
1442
1443
1444 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1445 {
1446 struct wpabuf *cred;
1447
1448 if (wps->wps->registrar->skip_cred_build)
1449 goto skip_cred_build;
1450
1451 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1452 if (wps->use_cred) {
1453 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1454 goto use_provided;
1455 }
1456 os_memset(&wps->cred, 0, sizeof(wps->cred));
1457
1458 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1459 wps->cred.ssid_len = wps->wps->ssid_len;
1460
1461 /* Select the best authentication and encryption type */
1462 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1463 wps->auth_type = WPS_AUTH_WPA2PSK;
1464 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1465 wps->auth_type = WPS_AUTH_WPAPSK;
1466 else if (wps->auth_type & WPS_AUTH_OPEN)
1467 wps->auth_type = WPS_AUTH_OPEN;
1468 else if (wps->auth_type & WPS_AUTH_SHARED)
1469 wps->auth_type = WPS_AUTH_SHARED;
1470 else {
1471 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1472 wps->auth_type);
1473 return -1;
1474 }
1475 wps->cred.auth_type = wps->auth_type;
1476
1477 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1478 wps->auth_type == WPS_AUTH_WPAPSK) {
1479 if (wps->encr_type & WPS_ENCR_AES)
1480 wps->encr_type = WPS_ENCR_AES;
1481 else if (wps->encr_type & WPS_ENCR_TKIP)
1482 wps->encr_type = WPS_ENCR_TKIP;
1483 else {
1484 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1485 "type for WPA/WPA2");
1486 return -1;
1487 }
1488 } else {
1489 if (wps->encr_type & WPS_ENCR_WEP)
1490 wps->encr_type = WPS_ENCR_WEP;
1491 else if (wps->encr_type & WPS_ENCR_NONE)
1492 wps->encr_type = WPS_ENCR_NONE;
1493 else {
1494 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1495 "type for non-WPA/WPA2 mode");
1496 return -1;
1497 }
1498 }
1499 wps->cred.encr_type = wps->encr_type;
1500 /*
1501 * Set MAC address in the Credential to be the Enrollee's MAC address
1502 */
1503 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1504
1505 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1506 !wps->wps->registrar->disable_auto_conf) {
1507 u8 r[16];
1508 /* Generate a random passphrase */
1509 if (random_get_bytes(r, sizeof(r)) < 0)
1510 return -1;
1511 os_free(wps->new_psk);
1512 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1513 if (wps->new_psk == NULL)
1514 return -1;
1515 wps->new_psk_len--; /* remove newline */
1516 while (wps->new_psk_len &&
1517 wps->new_psk[wps->new_psk_len - 1] == '=')
1518 wps->new_psk_len--;
1519 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1520 wps->new_psk, wps->new_psk_len);
1521 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1522 wps->cred.key_len = wps->new_psk_len;
1523 } else if (wps->use_psk_key && wps->wps->psk_set) {
1524 char hex[65];
1525 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1526 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1527 os_memcpy(wps->cred.key, hex, 32 * 2);
1528 wps->cred.key_len = 32 * 2;
1529 } else if (wps->wps->network_key) {
1530 os_memcpy(wps->cred.key, wps->wps->network_key,
1531 wps->wps->network_key_len);
1532 wps->cred.key_len = wps->wps->network_key_len;
1533 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1534 char hex[65];
1535 /* Generate a random per-device PSK */
1536 os_free(wps->new_psk);
1537 wps->new_psk_len = 32;
1538 wps->new_psk = os_malloc(wps->new_psk_len);
1539 if (wps->new_psk == NULL)
1540 return -1;
1541 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1542 os_free(wps->new_psk);
1543 wps->new_psk = NULL;
1544 return -1;
1545 }
1546 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1547 wps->new_psk, wps->new_psk_len);
1548 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1549 wps->new_psk_len);
1550 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1551 wps->cred.key_len = wps->new_psk_len * 2;
1552 }
1553
1554 use_provided:
1555 #ifdef CONFIG_WPS_TESTING
1556 if (wps_testing_dummy_cred)
1557 cred = wpabuf_alloc(200);
1558 else
1559 cred = NULL;
1560 if (cred) {
1561 struct wps_credential dummy;
1562 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1563 os_memset(&dummy, 0, sizeof(dummy));
1564 os_memcpy(dummy.ssid, "dummy", 5);
1565 dummy.ssid_len = 5;
1566 dummy.auth_type = WPS_AUTH_WPA2PSK;
1567 dummy.encr_type = WPS_ENCR_AES;
1568 os_memcpy(dummy.key, "dummy psk", 9);
1569 dummy.key_len = 9;
1570 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1571 wps_build_credential(cred, &dummy);
1572 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1573
1574 wpabuf_put_be16(msg, ATTR_CRED);
1575 wpabuf_put_be16(msg, wpabuf_len(cred));
1576 wpabuf_put_buf(msg, cred);
1577
1578 wpabuf_free(cred);
1579 }
1580 #endif /* CONFIG_WPS_TESTING */
1581
1582 cred = wpabuf_alloc(200);
1583 if (cred == NULL)
1584 return -1;
1585
1586 if (wps_build_credential(cred, &wps->cred)) {
1587 wpabuf_free(cred);
1588 return -1;
1589 }
1590
1591 wpabuf_put_be16(msg, ATTR_CRED);
1592 wpabuf_put_be16(msg, wpabuf_len(cred));
1593 wpabuf_put_buf(msg, cred);
1594 wpabuf_free(cred);
1595
1596 skip_cred_build:
1597 if (wps->wps->registrar->extra_cred) {
1598 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1599 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1600 }
1601
1602 return 0;
1603 }
1604
1605
1606 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1607 {
1608 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1609
1610 if (wps_build_credential(msg, &wps->cred))
1611 return -1;
1612
1613 return 0;
1614 }
1615
1616
1617 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1618 {
1619 struct wpabuf *msg, *plain;
1620
1621 msg = wpabuf_alloc(1000);
1622 if (msg == NULL)
1623 return NULL;
1624
1625 plain = wpabuf_alloc(200);
1626 if (plain == NULL) {
1627 wpabuf_free(msg);
1628 return NULL;
1629 }
1630
1631 if (wps_build_ap_settings(wps, plain)) {
1632 wpabuf_free(plain);
1633 wpabuf_free(msg);
1634 return NULL;
1635 }
1636
1637 wpabuf_put_be16(msg, ATTR_CRED);
1638 wpabuf_put_be16(msg, wpabuf_len(plain));
1639 wpabuf_put_buf(msg, plain);
1640 wpabuf_free(plain);
1641
1642 return msg;
1643 }
1644
1645
1646 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1647 {
1648 struct wpabuf *msg;
1649
1650 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1651 return NULL;
1652 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1653 wps->nonce_r, WPS_NONCE_LEN);
1654 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1655
1656 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1657 msg = wpabuf_alloc(1000);
1658 if (msg == NULL)
1659 return NULL;
1660
1661 if (wps_build_version(msg) ||
1662 wps_build_msg_type(msg, WPS_M2) ||
1663 wps_build_enrollee_nonce(wps, msg) ||
1664 wps_build_registrar_nonce(wps, msg) ||
1665 wps_build_uuid_r(wps, msg) ||
1666 wps_build_public_key(wps, msg) ||
1667 wps_derive_keys(wps) ||
1668 wps_build_auth_type_flags(wps, msg) ||
1669 wps_build_encr_type_flags(wps, msg) ||
1670 wps_build_conn_type_flags(wps, msg) ||
1671 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1672 wps_build_device_attrs(&wps->wps->dev, msg) ||
1673 wps_build_rf_bands(&wps->wps->dev, msg) ||
1674 wps_build_assoc_state(wps, msg) ||
1675 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1676 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1677 wps_build_os_version(&wps->wps->dev, msg) ||
1678 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1679 wps_build_authenticator(wps, msg)) {
1680 wpabuf_free(msg);
1681 return NULL;
1682 }
1683
1684 wps->int_reg = 1;
1685 wps->state = RECV_M3;
1686 return msg;
1687 }
1688
1689
1690 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1691 {
1692 struct wpabuf *msg;
1693 u16 err = wps->config_error;
1694
1695 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1696 msg = wpabuf_alloc(1000);
1697 if (msg == NULL)
1698 return NULL;
1699
1700 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1701 err == WPS_CFG_NO_ERROR)
1702 err = WPS_CFG_SETUP_LOCKED;
1703
1704 if (wps_build_version(msg) ||
1705 wps_build_msg_type(msg, WPS_M2D) ||
1706 wps_build_enrollee_nonce(wps, msg) ||
1707 wps_build_registrar_nonce(wps, msg) ||
1708 wps_build_uuid_r(wps, msg) ||
1709 wps_build_auth_type_flags(wps, msg) ||
1710 wps_build_encr_type_flags(wps, msg) ||
1711 wps_build_conn_type_flags(wps, msg) ||
1712 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1713 wps_build_device_attrs(&wps->wps->dev, msg) ||
1714 wps_build_rf_bands(&wps->wps->dev, msg) ||
1715 wps_build_assoc_state(wps, msg) ||
1716 wps_build_config_error(msg, err) ||
1717 wps_build_os_version(&wps->wps->dev, msg) ||
1718 wps_build_wfa_ext(msg, 0, NULL, 0)) {
1719 wpabuf_free(msg);
1720 return NULL;
1721 }
1722
1723 wps->state = RECV_M2D_ACK;
1724 return msg;
1725 }
1726
1727
1728 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1729 {
1730 struct wpabuf *msg, *plain;
1731
1732 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1733
1734 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1735
1736 plain = wpabuf_alloc(200);
1737 if (plain == NULL)
1738 return NULL;
1739
1740 msg = wpabuf_alloc(1000);
1741 if (msg == NULL) {
1742 wpabuf_free(plain);
1743 return NULL;
1744 }
1745
1746 if (wps_build_version(msg) ||
1747 wps_build_msg_type(msg, WPS_M4) ||
1748 wps_build_enrollee_nonce(wps, msg) ||
1749 wps_build_r_hash(wps, msg) ||
1750 wps_build_r_snonce1(wps, plain) ||
1751 wps_build_key_wrap_auth(wps, plain) ||
1752 wps_build_encr_settings(wps, msg, plain) ||
1753 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1754 wps_build_authenticator(wps, msg)) {
1755 wpabuf_free(plain);
1756 wpabuf_free(msg);
1757 return NULL;
1758 }
1759 wpabuf_free(plain);
1760
1761 wps->state = RECV_M5;
1762 return msg;
1763 }
1764
1765
1766 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1767 {
1768 struct wpabuf *msg, *plain;
1769
1770 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1771
1772 plain = wpabuf_alloc(200);
1773 if (plain == NULL)
1774 return NULL;
1775
1776 msg = wpabuf_alloc(1000);
1777 if (msg == NULL) {
1778 wpabuf_free(plain);
1779 return NULL;
1780 }
1781
1782 if (wps_build_version(msg) ||
1783 wps_build_msg_type(msg, WPS_M6) ||
1784 wps_build_enrollee_nonce(wps, msg) ||
1785 wps_build_r_snonce2(wps, plain) ||
1786 wps_build_key_wrap_auth(wps, plain) ||
1787 wps_build_encr_settings(wps, msg, plain) ||
1788 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1789 wps_build_authenticator(wps, msg)) {
1790 wpabuf_free(plain);
1791 wpabuf_free(msg);
1792 return NULL;
1793 }
1794 wpabuf_free(plain);
1795
1796 wps->wps_pin_revealed = 1;
1797 wps->state = RECV_M7;
1798 return msg;
1799 }
1800
1801
1802 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1803 {
1804 struct wpabuf *msg, *plain;
1805
1806 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1807
1808 plain = wpabuf_alloc(500);
1809 if (plain == NULL)
1810 return NULL;
1811
1812 msg = wpabuf_alloc(1000);
1813 if (msg == NULL) {
1814 wpabuf_free(plain);
1815 return NULL;
1816 }
1817
1818 if (wps_build_version(msg) ||
1819 wps_build_msg_type(msg, WPS_M8) ||
1820 wps_build_enrollee_nonce(wps, msg) ||
1821 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1822 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1823 wps_build_key_wrap_auth(wps, plain) ||
1824 wps_build_encr_settings(wps, msg, plain) ||
1825 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1826 wps_build_authenticator(wps, msg)) {
1827 wpabuf_free(plain);
1828 wpabuf_free(msg);
1829 return NULL;
1830 }
1831 wpabuf_free(plain);
1832
1833 wps->state = RECV_DONE;
1834 return msg;
1835 }
1836
1837
1838 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1839 enum wsc_op_code *op_code)
1840 {
1841 struct wpabuf *msg;
1842
1843 #ifdef CONFIG_WPS_UPNP
1844 if (!wps->int_reg && wps->wps->wps_upnp) {
1845 struct upnp_pending_message *p, *prev = NULL;
1846 if (wps->ext_reg > 1)
1847 wps_registrar_free_pending_m2(wps->wps);
1848 p = wps->wps->upnp_msgs;
1849 /* TODO: check pending message MAC address */
1850 while (p && p->next) {
1851 prev = p;
1852 p = p->next;
1853 }
1854 if (p) {
1855 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1856 "UPnP");
1857 if (prev)
1858 prev->next = NULL;
1859 else
1860 wps->wps->upnp_msgs = NULL;
1861 msg = p->msg;
1862 switch (p->type) {
1863 case WPS_WSC_ACK:
1864 *op_code = WSC_ACK;
1865 break;
1866 case WPS_WSC_NACK:
1867 *op_code = WSC_NACK;
1868 break;
1869 default:
1870 *op_code = WSC_MSG;
1871 break;
1872 }
1873 os_free(p);
1874 if (wps->ext_reg == 0)
1875 wps->ext_reg = 1;
1876 return msg;
1877 }
1878 }
1879 if (wps->ext_reg) {
1880 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
1881 "pending message available");
1882 return NULL;
1883 }
1884 #endif /* CONFIG_WPS_UPNP */
1885
1886 switch (wps->state) {
1887 case SEND_M2:
1888 if (wps_get_dev_password(wps) < 0)
1889 msg = wps_build_m2d(wps);
1890 else
1891 msg = wps_build_m2(wps);
1892 *op_code = WSC_MSG;
1893 break;
1894 case SEND_M2D:
1895 msg = wps_build_m2d(wps);
1896 *op_code = WSC_MSG;
1897 break;
1898 case SEND_M4:
1899 msg = wps_build_m4(wps);
1900 *op_code = WSC_MSG;
1901 break;
1902 case SEND_M6:
1903 msg = wps_build_m6(wps);
1904 *op_code = WSC_MSG;
1905 break;
1906 case SEND_M8:
1907 msg = wps_build_m8(wps);
1908 *op_code = WSC_MSG;
1909 break;
1910 case RECV_DONE:
1911 msg = wps_build_wsc_ack(wps);
1912 *op_code = WSC_ACK;
1913 break;
1914 case SEND_WSC_NACK:
1915 msg = wps_build_wsc_nack(wps);
1916 *op_code = WSC_NACK;
1917 break;
1918 default:
1919 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
1920 "a message", wps->state);
1921 msg = NULL;
1922 break;
1923 }
1924
1925 if (*op_code == WSC_MSG && msg) {
1926 /* Save a copy of the last message for Authenticator derivation
1927 */
1928 wpabuf_free(wps->last_msg);
1929 wps->last_msg = wpabuf_dup(msg);
1930 }
1931
1932 return msg;
1933 }
1934
1935
1936 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
1937 {
1938 if (e_nonce == NULL) {
1939 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
1940 return -1;
1941 }
1942
1943 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
1944 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
1945 wps->nonce_e, WPS_NONCE_LEN);
1946
1947 return 0;
1948 }
1949
1950
1951 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
1952 {
1953 if (r_nonce == NULL) {
1954 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
1955 return -1;
1956 }
1957
1958 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
1959 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
1960 return -1;
1961 }
1962
1963 return 0;
1964 }
1965
1966
1967 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
1968 {
1969 if (uuid_e == NULL) {
1970 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
1971 return -1;
1972 }
1973
1974 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
1975 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
1976
1977 return 0;
1978 }
1979
1980
1981 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
1982 {
1983 if (pw_id == NULL) {
1984 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
1985 return -1;
1986 }
1987
1988 wps->dev_pw_id = WPA_GET_BE16(pw_id);
1989 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
1990
1991 return 0;
1992 }
1993
1994
1995 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
1996 {
1997 if (e_hash1 == NULL) {
1998 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
1999 return -1;
2000 }
2001
2002 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2003 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2004
2005 return 0;
2006 }
2007
2008
2009 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2010 {
2011 if (e_hash2 == NULL) {
2012 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2013 return -1;
2014 }
2015
2016 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2017 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2018
2019 return 0;
2020 }
2021
2022
2023 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2024 {
2025 u8 hash[SHA256_MAC_LEN];
2026 const u8 *addr[4];
2027 size_t len[4];
2028
2029 if (e_snonce1 == NULL) {
2030 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2031 return -1;
2032 }
2033
2034 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2035 WPS_SECRET_NONCE_LEN);
2036
2037 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2038 addr[0] = e_snonce1;
2039 len[0] = WPS_SECRET_NONCE_LEN;
2040 addr[1] = wps->psk1;
2041 len[1] = WPS_PSK_LEN;
2042 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2043 len[2] = wpabuf_len(wps->dh_pubkey_e);
2044 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2045 len[3] = wpabuf_len(wps->dh_pubkey_r);
2046 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2047
2048 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2049 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2050 "not match with the pre-committed value");
2051 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2052 wps_pwd_auth_fail_event(wps->wps, 0, 1);
2053 return -1;
2054 }
2055
2056 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2057 "half of the device password");
2058
2059 return 0;
2060 }
2061
2062
2063 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2064 {
2065 u8 hash[SHA256_MAC_LEN];
2066 const u8 *addr[4];
2067 size_t len[4];
2068
2069 if (e_snonce2 == NULL) {
2070 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2071 return -1;
2072 }
2073
2074 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2075 WPS_SECRET_NONCE_LEN);
2076
2077 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2078 addr[0] = e_snonce2;
2079 len[0] = WPS_SECRET_NONCE_LEN;
2080 addr[1] = wps->psk2;
2081 len[1] = WPS_PSK_LEN;
2082 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2083 len[2] = wpabuf_len(wps->dh_pubkey_e);
2084 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2085 len[3] = wpabuf_len(wps->dh_pubkey_r);
2086 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2087
2088 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2089 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2090 "not match with the pre-committed value");
2091 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2092 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2093 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2094 return -1;
2095 }
2096
2097 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2098 "half of the device password");
2099 wps->wps_pin_revealed = 0;
2100 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2101
2102 /*
2103 * In case wildcard PIN is used and WPS handshake succeeds in the first
2104 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2105 * sure the PIN gets invalidated here.
2106 */
2107 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2108
2109 return 0;
2110 }
2111
2112
2113 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2114 {
2115 if (mac_addr == NULL) {
2116 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2117 return -1;
2118 }
2119
2120 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2121 MAC2STR(mac_addr));
2122 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2123 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2124
2125 return 0;
2126 }
2127
2128
2129 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2130 size_t pk_len)
2131 {
2132 if (pk == NULL || pk_len == 0) {
2133 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2134 return -1;
2135 }
2136
2137 #ifdef CONFIG_WPS_OOB
2138 if (wps->wps->oob_conf.pubkey_hash != NULL) {
2139 const u8 *addr[1];
2140 u8 hash[WPS_HASH_LEN];
2141
2142 addr[0] = pk;
2143 sha256_vector(1, addr, &pk_len, hash);
2144 if (os_memcmp(hash,
2145 wpabuf_head(wps->wps->oob_conf.pubkey_hash),
2146 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2147 wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
2148 return -1;
2149 }
2150 }
2151 #endif /* CONFIG_WPS_OOB */
2152
2153 wpabuf_free(wps->dh_pubkey_e);
2154 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2155 if (wps->dh_pubkey_e == NULL)
2156 return -1;
2157
2158 return 0;
2159 }
2160
2161
2162 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2163 {
2164 u16 auth_types;
2165
2166 if (auth == NULL) {
2167 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2168 "received");
2169 return -1;
2170 }
2171
2172 auth_types = WPA_GET_BE16(auth);
2173
2174 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2175 auth_types);
2176 wps->auth_type = wps->wps->auth_types & auth_types;
2177 if (wps->auth_type == 0) {
2178 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2179 "authentication types (own 0x%x Enrollee 0x%x)",
2180 wps->wps->auth_types, auth_types);
2181 #ifdef WPS_WORKAROUNDS
2182 /*
2183 * Some deployed implementations seem to advertise incorrect
2184 * information in this attribute. For example, Linksys WRT350N
2185 * seems to have a byteorder bug that breaks this negotiation.
2186 * In order to interoperate with existing implementations,
2187 * assume that the Enrollee supports everything we do.
2188 */
2189 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2190 "does not advertise supported authentication types "
2191 "correctly");
2192 wps->auth_type = wps->wps->auth_types;
2193 #else /* WPS_WORKAROUNDS */
2194 return -1;
2195 #endif /* WPS_WORKAROUNDS */
2196 }
2197
2198 return 0;
2199 }
2200
2201
2202 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2203 {
2204 u16 encr_types;
2205
2206 if (encr == NULL) {
2207 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2208 "received");
2209 return -1;
2210 }
2211
2212 encr_types = WPA_GET_BE16(encr);
2213
2214 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2215 encr_types);
2216 wps->encr_type = wps->wps->encr_types & encr_types;
2217 if (wps->encr_type == 0) {
2218 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2219 "encryption types (own 0x%x Enrollee 0x%x)",
2220 wps->wps->encr_types, encr_types);
2221 #ifdef WPS_WORKAROUNDS
2222 /*
2223 * Some deployed implementations seem to advertise incorrect
2224 * information in this attribute. For example, Linksys WRT350N
2225 * seems to have a byteorder bug that breaks this negotiation.
2226 * In order to interoperate with existing implementations,
2227 * assume that the Enrollee supports everything we do.
2228 */
2229 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2230 "does not advertise supported encryption types "
2231 "correctly");
2232 wps->encr_type = wps->wps->encr_types;
2233 #else /* WPS_WORKAROUNDS */
2234 return -1;
2235 #endif /* WPS_WORKAROUNDS */
2236 }
2237
2238 return 0;
2239 }
2240
2241
2242 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2243 {
2244 if (conn == NULL) {
2245 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2246 "received");
2247 return -1;
2248 }
2249
2250 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2251 *conn);
2252
2253 return 0;
2254 }
2255
2256
2257 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2258 {
2259 u16 m;
2260
2261 if (methods == NULL) {
2262 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2263 return -1;
2264 }
2265
2266 m = WPA_GET_BE16(methods);
2267
2268 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2269 "%s%s%s%s%s%s%s%s%s", m,
2270 m & WPS_CONFIG_USBA ? " [USBA]" : "",
2271 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2272 m & WPS_CONFIG_LABEL ? " [Label]" : "",
2273 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2274 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2275 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2276 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2277 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2278 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2279
2280 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2281 /*
2282 * The Enrollee does not have a display so it is unlikely to be
2283 * able to show the passphrase to a user and as such, could
2284 * benefit from receiving PSK to reduce key derivation time.
2285 */
2286 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2287 "Enrollee not supporting display");
2288 wps->use_psk_key = 1;
2289 }
2290
2291 return 0;
2292 }
2293
2294
2295 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2296 {
2297 if (state == NULL) {
2298 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2299 "received");
2300 return -1;
2301 }
2302
2303 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2304 *state);
2305
2306 return 0;
2307 }
2308
2309
2310 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2311 {
2312 u16 a;
2313
2314 if (assoc == NULL) {
2315 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2316 return -1;
2317 }
2318
2319 a = WPA_GET_BE16(assoc);
2320 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2321
2322 return 0;
2323 }
2324
2325
2326 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2327 {
2328 u16 e;
2329
2330 if (err == NULL) {
2331 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2332 return -1;
2333 }
2334
2335 e = WPA_GET_BE16(err);
2336 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2337
2338 return 0;
2339 }
2340
2341
2342 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2343 {
2344 #ifdef CONFIG_P2P
2345 struct wps_registrar *reg = wps->wps->registrar;
2346
2347 if (is_zero_ether_addr(reg->p2p_dev_addr))
2348 return 1; /* no filtering in use */
2349
2350 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2351 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2352 "filtering for PBC: expected " MACSTR " was "
2353 MACSTR " - indicate PBC session overlap",
2354 MAC2STR(reg->p2p_dev_addr),
2355 MAC2STR(wps->p2p_dev_addr));
2356 return 0;
2357 }
2358 #endif /* CONFIG_P2P */
2359 return 1;
2360 }
2361
2362
2363 static int wps_registrar_skip_overlap(struct wps_data *wps)
2364 {
2365 #ifdef CONFIG_P2P
2366 struct wps_registrar *reg = wps->wps->registrar;
2367
2368 if (is_zero_ether_addr(reg->p2p_dev_addr))
2369 return 0; /* no specific Enrollee selected */
2370
2371 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2372 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2373 "Enrollee match");
2374 return 1;
2375 }
2376 #endif /* CONFIG_P2P */
2377 return 0;
2378 }
2379
2380
2381 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2382 struct wps_parse_attr *attr)
2383 {
2384 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2385
2386 if (wps->state != RECV_M1) {
2387 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2388 "receiving M1", wps->state);
2389 return WPS_FAILURE;
2390 }
2391
2392 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2393 wps_process_mac_addr(wps, attr->mac_addr) ||
2394 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2395 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2396 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2397 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2398 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2399 wps_process_config_methods(wps, attr->config_methods) ||
2400 wps_process_wps_state(wps, attr->wps_state) ||
2401 wps_process_device_attrs(&wps->peer_dev, attr) ||
2402 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2403 wps_process_assoc_state(wps, attr->assoc_state) ||
2404 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2405 wps_process_config_error(wps, attr->config_error) ||
2406 wps_process_os_version(&wps->peer_dev, attr->os_version))
2407 return WPS_FAILURE;
2408
2409 if (wps->dev_pw_id < 0x10 &&
2410 wps->dev_pw_id != DEV_PW_DEFAULT &&
2411 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2412 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2413 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2414 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2415 !wps->wps->registrar->pbc)) {
2416 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2417 wps->dev_pw_id);
2418 wps->state = SEND_M2D;
2419 return WPS_CONTINUE;
2420 }
2421
2422 #ifdef CONFIG_WPS_OOB
2423 if (wps->dev_pw_id >= 0x10 &&
2424 wps->dev_pw_id != wps->wps->oob_dev_pw_id) {
2425 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID "
2426 "%d mismatch", wps->dev_pw_id);
2427 wps->state = SEND_M2D;
2428 return WPS_CONTINUE;
2429 }
2430 #endif /* CONFIG_WPS_OOB */
2431
2432 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2433 if ((wps->wps->registrar->force_pbc_overlap ||
2434 wps_registrar_pbc_overlap(wps->wps->registrar,
2435 wps->mac_addr_e, wps->uuid_e) ||
2436 !wps_registrar_p2p_dev_addr_match(wps)) &&
2437 !wps_registrar_skip_overlap(wps)) {
2438 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2439 "negotiation");
2440 wps->state = SEND_M2D;
2441 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2442 wps_pbc_overlap_event(wps->wps);
2443 wps_fail_event(wps->wps, WPS_M1,
2444 WPS_CFG_MULTIPLE_PBC_DETECTED,
2445 WPS_EI_NO_ERROR);
2446 wps->wps->registrar->force_pbc_overlap = 1;
2447 return WPS_CONTINUE;
2448 }
2449 wps_registrar_add_pbc_session(wps->wps->registrar,
2450 wps->mac_addr_e, wps->uuid_e);
2451 wps->pbc = 1;
2452 }
2453
2454 #ifdef WPS_WORKAROUNDS
2455 /*
2456 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2457 * passphrase format. To avoid interop issues, force PSK format to be
2458 * used.
2459 */
2460 if (!wps->use_psk_key &&
2461 wps->peer_dev.manufacturer &&
2462 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2463 wps->peer_dev.model_name &&
2464 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2465 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2466 "PSK format");
2467 wps->use_psk_key = 1;
2468 }
2469 #endif /* WPS_WORKAROUNDS */
2470
2471 wps->state = SEND_M2;
2472 return WPS_CONTINUE;
2473 }
2474
2475
2476 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2477 const struct wpabuf *msg,
2478 struct wps_parse_attr *attr)
2479 {
2480 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2481
2482 if (wps->state != RECV_M3) {
2483 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2484 "receiving M3", wps->state);
2485 wps->state = SEND_WSC_NACK;
2486 return WPS_CONTINUE;
2487 }
2488
2489 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2490 !wps_registrar_skip_overlap(wps)) {
2491 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2492 "session overlap");
2493 wps->state = SEND_WSC_NACK;
2494 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2495 return WPS_CONTINUE;
2496 }
2497
2498 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2499 wps_process_authenticator(wps, attr->authenticator, msg) ||
2500 wps_process_e_hash1(wps, attr->e_hash1) ||
2501 wps_process_e_hash2(wps, attr->e_hash2)) {
2502 wps->state = SEND_WSC_NACK;
2503 return WPS_CONTINUE;
2504 }
2505
2506 wps->state = SEND_M4;
2507 return WPS_CONTINUE;
2508 }
2509
2510
2511 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2512 const struct wpabuf *msg,
2513 struct wps_parse_attr *attr)
2514 {
2515 struct wpabuf *decrypted;
2516 struct wps_parse_attr eattr;
2517
2518 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2519
2520 if (wps->state != RECV_M5) {
2521 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2522 "receiving M5", wps->state);
2523 wps->state = SEND_WSC_NACK;
2524 return WPS_CONTINUE;
2525 }
2526
2527 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2528 !wps_registrar_skip_overlap(wps)) {
2529 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2530 "session overlap");
2531 wps->state = SEND_WSC_NACK;
2532 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2533 return WPS_CONTINUE;
2534 }
2535
2536 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2537 wps_process_authenticator(wps, attr->authenticator, msg)) {
2538 wps->state = SEND_WSC_NACK;
2539 return WPS_CONTINUE;
2540 }
2541
2542 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2543 attr->encr_settings_len);
2544 if (decrypted == NULL) {
2545 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2546 "Settings attribute");
2547 wps->state = SEND_WSC_NACK;
2548 return WPS_CONTINUE;
2549 }
2550
2551 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2552 wpabuf_free(decrypted);
2553 wps->state = SEND_WSC_NACK;
2554 return WPS_CONTINUE;
2555 }
2556
2557 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2558 "attribute");
2559 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2560 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2561 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2562 wpabuf_free(decrypted);
2563 wps->state = SEND_WSC_NACK;
2564 return WPS_CONTINUE;
2565 }
2566 wpabuf_free(decrypted);
2567
2568 wps->state = SEND_M6;
2569 return WPS_CONTINUE;
2570 }
2571
2572
2573 static void wps_sta_cred_cb(struct wps_data *wps)
2574 {
2575 /*
2576 * Update credential to only include a single authentication and
2577 * encryption type in case the AP configuration includes more than one
2578 * option.
2579 */
2580 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2581 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2582 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2583 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2584 if (wps->cred.encr_type & WPS_ENCR_AES)
2585 wps->cred.encr_type = WPS_ENCR_AES;
2586 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2587 wps->cred.encr_type = WPS_ENCR_TKIP;
2588 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2589 "AP configuration");
2590 if (wps->wps->cred_cb)
2591 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2592 }
2593
2594
2595 static void wps_cred_update(struct wps_credential *dst,
2596 struct wps_credential *src)
2597 {
2598 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2599 dst->ssid_len = src->ssid_len;
2600 dst->auth_type = src->auth_type;
2601 dst->encr_type = src->encr_type;
2602 dst->key_idx = src->key_idx;
2603 os_memcpy(dst->key, src->key, sizeof(dst->key));
2604 dst->key_len = src->key_len;
2605 }
2606
2607
2608 static int wps_process_ap_settings_r(struct wps_data *wps,
2609 struct wps_parse_attr *attr)
2610 {
2611 struct wpabuf *msg;
2612
2613 if (wps->wps->ap || wps->er)
2614 return 0;
2615
2616 /* AP Settings Attributes in M7 when Enrollee is an AP */
2617 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2618 return -1;
2619
2620 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2621
2622 if (wps->new_ap_settings) {
2623 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2624 "new settings");
2625 wps_cred_update(&wps->cred, wps->new_ap_settings);
2626 return 0;
2627 } else {
2628 /*
2629 * Use the AP PIN only to receive the current AP settings, not
2630 * to reconfigure the AP.
2631 */
2632
2633 /*
2634 * Clear selected registrar here since we do not get to
2635 * WSC_Done in this protocol run.
2636 */
2637 wps_registrar_pin_completed(wps->wps->registrar);
2638
2639 msg = wps_build_ap_cred(wps);
2640 if (msg == NULL)
2641 return -1;
2642 wps->cred.cred_attr = wpabuf_head(msg);
2643 wps->cred.cred_attr_len = wpabuf_len(msg);
2644
2645 if (wps->ap_settings_cb) {
2646 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2647 &wps->cred);
2648 wpabuf_free(msg);
2649 return 1;
2650 }
2651 wps_sta_cred_cb(wps);
2652
2653 wps->cred.cred_attr = NULL;
2654 wps->cred.cred_attr_len = 0;
2655 wpabuf_free(msg);
2656
2657 return 1;
2658 }
2659 }
2660
2661
2662 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2663 const struct wpabuf *msg,
2664 struct wps_parse_attr *attr)
2665 {
2666 struct wpabuf *decrypted;
2667 struct wps_parse_attr eattr;
2668
2669 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2670
2671 if (wps->state != RECV_M7) {
2672 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2673 "receiving M7", wps->state);
2674 wps->state = SEND_WSC_NACK;
2675 return WPS_CONTINUE;
2676 }
2677
2678 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2679 !wps_registrar_skip_overlap(wps)) {
2680 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2681 "session overlap");
2682 wps->state = SEND_WSC_NACK;
2683 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2684 return WPS_CONTINUE;
2685 }
2686
2687 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2688 wps_process_authenticator(wps, attr->authenticator, msg)) {
2689 wps->state = SEND_WSC_NACK;
2690 return WPS_CONTINUE;
2691 }
2692
2693 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2694 attr->encr_settings_len);
2695 if (decrypted == NULL) {
2696 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2697 "Settings attribute");
2698 wps->state = SEND_WSC_NACK;
2699 return WPS_CONTINUE;
2700 }
2701
2702 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2703 attr->version2 != NULL) < 0) {
2704 wpabuf_free(decrypted);
2705 wps->state = SEND_WSC_NACK;
2706 return WPS_CONTINUE;
2707 }
2708
2709 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2710 "attribute");
2711 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2712 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2713 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2714 wps_process_ap_settings_r(wps, &eattr)) {
2715 wpabuf_free(decrypted);
2716 wps->state = SEND_WSC_NACK;
2717 return WPS_CONTINUE;
2718 }
2719
2720 wpabuf_free(decrypted);
2721
2722 wps->state = SEND_M8;
2723 return WPS_CONTINUE;
2724 }
2725
2726
2727 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2728 const struct wpabuf *msg)
2729 {
2730 struct wps_parse_attr attr;
2731 enum wps_process_res ret = WPS_CONTINUE;
2732
2733 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2734
2735 if (wps_parse_msg(msg, &attr) < 0)
2736 return WPS_FAILURE;
2737
2738 if (attr.msg_type == NULL) {
2739 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2740 wps->state = SEND_WSC_NACK;
2741 return WPS_CONTINUE;
2742 }
2743
2744 if (*attr.msg_type != WPS_M1 &&
2745 (attr.registrar_nonce == NULL ||
2746 os_memcmp(wps->nonce_r, attr.registrar_nonce,
2747 WPS_NONCE_LEN != 0))) {
2748 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2749 return WPS_FAILURE;
2750 }
2751
2752 switch (*attr.msg_type) {
2753 case WPS_M1:
2754 if (wps_validate_m1(msg) < 0)
2755 return WPS_FAILURE;
2756 #ifdef CONFIG_WPS_UPNP
2757 if (wps->wps->wps_upnp && attr.mac_addr) {
2758 /* Remove old pending messages when starting new run */
2759 wps_free_pending_msgs(wps->wps->upnp_msgs);
2760 wps->wps->upnp_msgs = NULL;
2761
2762 upnp_wps_device_send_wlan_event(
2763 wps->wps->wps_upnp, attr.mac_addr,
2764 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2765 }
2766 #endif /* CONFIG_WPS_UPNP */
2767 ret = wps_process_m1(wps, &attr);
2768 break;
2769 case WPS_M3:
2770 if (wps_validate_m3(msg) < 0)
2771 return WPS_FAILURE;
2772 ret = wps_process_m3(wps, msg, &attr);
2773 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2774 wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2775 wps->error_indication);
2776 break;
2777 case WPS_M5:
2778 if (wps_validate_m5(msg) < 0)
2779 return WPS_FAILURE;
2780 ret = wps_process_m5(wps, msg, &attr);
2781 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2782 wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2783 wps->error_indication);
2784 break;
2785 case WPS_M7:
2786 if (wps_validate_m7(msg) < 0)
2787 return WPS_FAILURE;
2788 ret = wps_process_m7(wps, msg, &attr);
2789 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2790 wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2791 wps->error_indication);
2792 break;
2793 default:
2794 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2795 *attr.msg_type);
2796 return WPS_FAILURE;
2797 }
2798
2799 if (ret == WPS_CONTINUE) {
2800 /* Save a copy of the last message for Authenticator derivation
2801 */
2802 wpabuf_free(wps->last_msg);
2803 wps->last_msg = wpabuf_dup(msg);
2804 }
2805
2806 return ret;
2807 }
2808
2809
2810 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2811 const struct wpabuf *msg)
2812 {
2813 struct wps_parse_attr attr;
2814
2815 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2816
2817 if (wps_parse_msg(msg, &attr) < 0)
2818 return WPS_FAILURE;
2819
2820 if (attr.msg_type == NULL) {
2821 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2822 return WPS_FAILURE;
2823 }
2824
2825 if (*attr.msg_type != WPS_WSC_ACK) {
2826 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2827 *attr.msg_type);
2828 return WPS_FAILURE;
2829 }
2830
2831 #ifdef CONFIG_WPS_UPNP
2832 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2833 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2834 if (wps->wps->upnp_msgs)
2835 return WPS_CONTINUE;
2836 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2837 "external Registrar");
2838 return WPS_PENDING;
2839 }
2840 #endif /* CONFIG_WPS_UPNP */
2841
2842 if (attr.registrar_nonce == NULL ||
2843 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2844 {
2845 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2846 return WPS_FAILURE;
2847 }
2848
2849 if (attr.enrollee_nonce == NULL ||
2850 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2851 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2852 return WPS_FAILURE;
2853 }
2854
2855 if (wps->state == RECV_M2D_ACK) {
2856 #ifdef CONFIG_WPS_UPNP
2857 if (wps->wps->wps_upnp &&
2858 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2859 if (wps->wps->upnp_msgs)
2860 return WPS_CONTINUE;
2861 if (wps->ext_reg == 0)
2862 wps->ext_reg = 1;
2863 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2864 "external Registrar");
2865 return WPS_PENDING;
2866 }
2867 #endif /* CONFIG_WPS_UPNP */
2868
2869 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2870 "terminate negotiation");
2871 }
2872
2873 return WPS_FAILURE;
2874 }
2875
2876
2877 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
2878 const struct wpabuf *msg)
2879 {
2880 struct wps_parse_attr attr;
2881 int old_state;
2882 u16 config_error;
2883
2884 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
2885
2886 old_state = wps->state;
2887 wps->state = SEND_WSC_NACK;
2888
2889 if (wps_parse_msg(msg, &attr) < 0)
2890 return WPS_FAILURE;
2891
2892 if (attr.msg_type == NULL) {
2893 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2894 return WPS_FAILURE;
2895 }
2896
2897 if (*attr.msg_type != WPS_WSC_NACK) {
2898 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2899 *attr.msg_type);
2900 return WPS_FAILURE;
2901 }
2902
2903 #ifdef CONFIG_WPS_UPNP
2904 if (wps->wps->wps_upnp && wps->ext_reg) {
2905 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2906 "Registrar terminated by the Enrollee");
2907 return WPS_FAILURE;
2908 }
2909 #endif /* CONFIG_WPS_UPNP */
2910
2911 if (attr.registrar_nonce == NULL ||
2912 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2913 {
2914 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2915 return WPS_FAILURE;
2916 }
2917
2918 if (attr.enrollee_nonce == NULL ||
2919 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
2920 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2921 return WPS_FAILURE;
2922 }
2923
2924 if (attr.config_error == NULL) {
2925 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
2926 "in WSC_NACK");
2927 return WPS_FAILURE;
2928 }
2929
2930 config_error = WPA_GET_BE16(attr.config_error);
2931 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
2932 "Configuration Error %d", config_error);
2933
2934 switch (old_state) {
2935 case RECV_M3:
2936 wps_fail_event(wps->wps, WPS_M2, config_error,
2937 wps->error_indication);
2938 break;
2939 case RECV_M5:
2940 wps_fail_event(wps->wps, WPS_M4, config_error,
2941 wps->error_indication);
2942 break;
2943 case RECV_M7:
2944 wps_fail_event(wps->wps, WPS_M6, config_error,
2945 wps->error_indication);
2946 break;
2947 case RECV_DONE:
2948 wps_fail_event(wps->wps, WPS_M8, config_error,
2949 wps->error_indication);
2950 break;
2951 default:
2952 break;
2953 }
2954
2955 return WPS_FAILURE;
2956 }
2957
2958
2959 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
2960 const struct wpabuf *msg)
2961 {
2962 struct wps_parse_attr attr;
2963
2964 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
2965
2966 if (wps->state != RECV_DONE &&
2967 (!wps->wps->wps_upnp || !wps->ext_reg)) {
2968 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2969 "receiving WSC_Done", wps->state);
2970 return WPS_FAILURE;
2971 }
2972
2973 if (wps_parse_msg(msg, &attr) < 0)
2974 return WPS_FAILURE;
2975
2976 if (attr.msg_type == NULL) {
2977 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2978 return WPS_FAILURE;
2979 }
2980
2981 if (*attr.msg_type != WPS_WSC_DONE) {
2982 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2983 *attr.msg_type);
2984 return WPS_FAILURE;
2985 }
2986
2987 #ifdef CONFIG_WPS_UPNP
2988 if (wps->wps->wps_upnp && wps->ext_reg) {
2989 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
2990 "Registrar completed successfully");
2991 wps_device_store(wps->wps->registrar, &wps->peer_dev,
2992 wps->uuid_e);
2993 return WPS_DONE;
2994 }
2995 #endif /* CONFIG_WPS_UPNP */
2996
2997 if (attr.registrar_nonce == NULL ||
2998 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
2999 {
3000 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3001 return WPS_FAILURE;
3002 }
3003
3004 if (attr.enrollee_nonce == NULL ||
3005 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
3006 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3007 return WPS_FAILURE;
3008 }
3009
3010 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3011 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3012 wps->uuid_e);
3013
3014 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3015 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3016 struct wps_credential cred;
3017
3018 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3019 "on first Enrollee connection");
3020
3021 os_memset(&cred, 0, sizeof(cred));
3022 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3023 cred.ssid_len = wps->wps->ssid_len;
3024 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3025 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3026 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3027 cred.key_len = wps->new_psk_len;
3028
3029 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3030 wpa_hexdump_ascii_key(MSG_DEBUG,
3031 "WPS: Generated random passphrase",
3032 wps->new_psk, wps->new_psk_len);
3033 if (wps->wps->cred_cb)
3034 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3035
3036 os_free(wps->new_psk);
3037 wps->new_psk = NULL;
3038 }
3039
3040 if (!wps->wps->ap && !wps->er)
3041 wps_sta_cred_cb(wps);
3042
3043 if (wps->new_psk) {
3044 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3045 wps->new_psk, wps->new_psk_len)) {
3046 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3047 "new PSK");
3048 }
3049 os_free(wps->new_psk);
3050 wps->new_psk = NULL;
3051 }
3052
3053 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e);
3054
3055 if (wps->pbc) {
3056 wps_registrar_remove_pbc_session(wps->wps->registrar,
3057 wps->uuid_e,
3058 wps->p2p_dev_addr);
3059 wps_registrar_pbc_completed(wps->wps->registrar);
3060 } else {
3061 wps_registrar_pin_completed(wps->wps->registrar);
3062 }
3063 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3064 * merge them into APs own list.. */
3065
3066 wps_success_event(wps->wps);
3067
3068 return WPS_DONE;
3069 }
3070
3071
3072 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3073 enum wsc_op_code op_code,
3074 const struct wpabuf *msg)
3075 {
3076 enum wps_process_res ret;
3077
3078 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3079 "op_code=%d)",
3080 (unsigned long) wpabuf_len(msg), op_code);
3081
3082 #ifdef CONFIG_WPS_UPNP
3083 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3084 struct wps_parse_attr attr;
3085 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3086 *attr.msg_type == WPS_M3)
3087 wps->ext_reg = 2; /* past M2/M2D phase */
3088 }
3089 if (wps->ext_reg > 1)
3090 wps_registrar_free_pending_m2(wps->wps);
3091 if (wps->wps->wps_upnp && wps->ext_reg &&
3092 wps->wps->upnp_msgs == NULL &&
3093 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3094 {
3095 struct wps_parse_attr attr;
3096 int type;
3097 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3098 type = -1;
3099 else
3100 type = *attr.msg_type;
3101 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3102 " to external Registrar for processing", type);
3103 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3104 wps->mac_addr_e,
3105 UPNP_WPS_WLANEVENT_TYPE_EAP,
3106 msg);
3107 if (op_code == WSC_MSG)
3108 return WPS_PENDING;
3109 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3110 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3111 "external Registrar");
3112 return WPS_CONTINUE;
3113 }
3114 #endif /* CONFIG_WPS_UPNP */
3115
3116 switch (op_code) {
3117 case WSC_MSG:
3118 return wps_process_wsc_msg(wps, msg);
3119 case WSC_ACK:
3120 if (wps_validate_wsc_ack(msg) < 0)
3121 return WPS_FAILURE;
3122 return wps_process_wsc_ack(wps, msg);
3123 case WSC_NACK:
3124 if (wps_validate_wsc_nack(msg) < 0)
3125 return WPS_FAILURE;
3126 return wps_process_wsc_nack(wps, msg);
3127 case WSC_Done:
3128 if (wps_validate_wsc_done(msg) < 0)
3129 return WPS_FAILURE;
3130 ret = wps_process_wsc_done(wps, msg);
3131 if (ret == WPS_FAILURE) {
3132 wps->state = SEND_WSC_NACK;
3133 wps_fail_event(wps->wps, WPS_WSC_DONE,
3134 wps->config_error,
3135 wps->error_indication);
3136 }
3137 return ret;
3138 default:
3139 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3140 return WPS_FAILURE;
3141 }
3142 }
3143
3144
3145 int wps_registrar_update_ie(struct wps_registrar *reg)
3146 {
3147 return wps_set_ie(reg);
3148 }
3149
3150
3151 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3152 void *timeout_ctx)
3153 {
3154 struct wps_registrar *reg = eloop_ctx;
3155
3156 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3157 "unselect internal Registrar");
3158 reg->selected_registrar = 0;
3159 reg->pbc = 0;
3160 wps_registrar_selected_registrar_changed(reg);
3161 }
3162
3163
3164 #ifdef CONFIG_WPS_UPNP
3165 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3166 struct subscription *s)
3167 {
3168 int i, j;
3169 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3170 "config_methods=0x%x)",
3171 s->dev_password_id, s->config_methods);
3172 reg->sel_reg_union = 1;
3173 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3174 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3175 if (reg->sel_reg_config_methods_override == -1)
3176 reg->sel_reg_config_methods_override = 0;
3177 reg->sel_reg_config_methods_override |= s->config_methods;
3178 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3179 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3180 break;
3181 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3182 j++) {
3183 if (is_zero_ether_addr(s->authorized_macs[j]))
3184 break;
3185 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3186 MACSTR, MAC2STR(s->authorized_macs[j]));
3187 os_memcpy(reg->authorized_macs_union[i],
3188 s->authorized_macs[j], ETH_ALEN);
3189 i++;
3190 }
3191 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3192 (u8 *) reg->authorized_macs_union,
3193 sizeof(reg->authorized_macs_union));
3194 }
3195 #endif /* CONFIG_WPS_UPNP */
3196
3197
3198 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3199 {
3200 #ifdef CONFIG_WPS_UPNP
3201 struct subscription *s;
3202
3203 if (reg->wps->wps_upnp == NULL)
3204 return;
3205
3206 dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3207 struct subscription, list) {
3208 struct subscr_addr *sa;
3209 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3210 if (sa) {
3211 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3212 inet_ntoa(sa->saddr.sin_addr),
3213 ntohs(sa->saddr.sin_port));
3214 }
3215 if (s->selected_registrar)
3216 wps_registrar_sel_reg_add(reg, s);
3217 else
3218 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3219 "selected");
3220 }
3221 #endif /* CONFIG_WPS_UPNP */
3222 }
3223
3224
3225 /**
3226 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3227 * @reg: Registrar data from wps_registrar_init()
3228 *
3229 * This function is called when selected registrar state changes, e.g., when an
3230 * AP receives a SetSelectedRegistrar UPnP message.
3231 */
3232 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3233 {
3234 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3235
3236 reg->sel_reg_union = reg->selected_registrar;
3237 reg->sel_reg_dev_password_id_override = -1;
3238 reg->sel_reg_config_methods_override = -1;
3239 os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3240 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3241 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3242 (u8 *) reg->authorized_macs_union,
3243 sizeof(reg->authorized_macs_union));
3244 if (reg->selected_registrar) {
3245 u16 methods;
3246
3247 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3248 #ifdef CONFIG_WPS2
3249 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3250 WPS_CONFIG_PHY_PUSHBUTTON);
3251 #endif /* CONFIG_WPS2 */
3252 if (reg->pbc) {
3253 reg->sel_reg_dev_password_id_override =
3254 DEV_PW_PUSHBUTTON;
3255 wps_set_pushbutton(&methods, reg->wps->config_methods);
3256 }
3257 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3258 "(pbc=%d)", reg->pbc);
3259 reg->sel_reg_config_methods_override = methods;
3260 } else
3261 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3262
3263 wps_registrar_sel_reg_union(reg);
3264
3265 wps_set_ie(reg);
3266 wps_cb_set_sel_reg(reg);
3267 }
3268
3269
3270 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3271 char *buf, size_t buflen)
3272 {
3273 struct wps_registrar_device *d;
3274 int len = 0, ret;
3275 char uuid[40];
3276 char devtype[WPS_DEV_TYPE_BUFSIZE];
3277
3278 d = wps_device_get(reg, addr);
3279 if (d == NULL)
3280 return 0;
3281 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3282 return 0;
3283
3284 ret = os_snprintf(buf + len, buflen - len,
3285 "wpsUuid=%s\n"
3286 "wpsPrimaryDeviceType=%s\n"
3287 "wpsDeviceName=%s\n"
3288 "wpsManufacturer=%s\n"
3289 "wpsModelName=%s\n"
3290 "wpsModelNumber=%s\n"
3291 "wpsSerialNumber=%s\n",
3292 uuid,
3293 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3294 sizeof(devtype)),
3295 d->dev.device_name ? d->dev.device_name : "",
3296 d->dev.manufacturer ? d->dev.manufacturer : "",
3297 d->dev.model_name ? d->dev.model_name : "",
3298 d->dev.model_number ? d->dev.model_number : "",
3299 d->dev.serial_number ? d->dev.serial_number : "");
3300 if (ret < 0 || (size_t) ret >= buflen - len)
3301 return len;
3302 len += ret;
3303
3304 return len;
3305 }
3306
3307
3308 int wps_registrar_config_ap(struct wps_registrar *reg,
3309 struct wps_credential *cred)
3310 {
3311 #ifdef CONFIG_WPS2
3312 printf("encr_type=0x%x\n", cred->encr_type);
3313 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3314 WPS_ENCR_AES))) {
3315 if (cred->encr_type & WPS_ENCR_WEP) {
3316 wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3317 "due to WEP configuration");
3318 return -1;
3319 }
3320
3321 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3322 "invalid encr_type 0x%x", cred->encr_type);
3323 return -1;
3324 }
3325
3326 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3327 WPS_ENCR_TKIP) {
3328 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3329 "TKIP+AES");
3330 cred->encr_type |= WPS_ENCR_AES;
3331 }
3332
3333 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3334 WPS_AUTH_WPAPSK) {
3335 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3336 "WPAPSK+WPA2PSK");
3337 cred->auth_type |= WPS_AUTH_WPA2PSK;
3338 }
3339 #endif /* CONFIG_WPS2 */
3340
3341 if (reg->wps->cred_cb)
3342 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3343
3344 return -1;
3345 }
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