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WPS: Add RF bands attribute conditionally to Probe Response frame
[thirdparty/hostap.git] / src / wps / wps_registrar.c
1 /*
2 * Wi-Fi Protected Setup - Registrar
3 * Copyright (c) 2008-2012, 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 #ifdef CONFIG_WPS_NFC
30
31 struct wps_nfc_pw_token {
32 struct dl_list list;
33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN];
34 u16 pw_id;
35 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN];
36 size_t dev_pw_len;
37 };
38
39
40 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
41 {
42 dl_list_del(&token->list);
43 os_free(token);
44 }
45
46
47 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
48 {
49 struct wps_nfc_pw_token *token, *prev;
50 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
51 list) {
52 if (pw_id == 0 || pw_id == token->pw_id)
53 wps_remove_nfc_pw_token(token);
54 }
55 }
56
57
58 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens,
59 u16 pw_id)
60 {
61 struct wps_nfc_pw_token *token;
62 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
63 if (pw_id == token->pw_id)
64 return token;
65 }
66 return NULL;
67 }
68
69 #else /* CONFIG_WPS_NFC */
70
71 #define wps_free_nfc_pw_tokens(t, p) do { } while (0)
72
73 #endif /* CONFIG_WPS_NFC */
74
75
76 struct wps_uuid_pin {
77 struct dl_list list;
78 u8 uuid[WPS_UUID_LEN];
79 int wildcard_uuid;
80 u8 *pin;
81 size_t pin_len;
82 #define PIN_LOCKED BIT(0)
83 #define PIN_EXPIRES BIT(1)
84 int flags;
85 struct os_time expiration;
86 u8 enrollee_addr[ETH_ALEN];
87 };
88
89
90 static void wps_free_pin(struct wps_uuid_pin *pin)
91 {
92 os_free(pin->pin);
93 os_free(pin);
94 }
95
96
97 static void wps_remove_pin(struct wps_uuid_pin *pin)
98 {
99 dl_list_del(&pin->list);
100 wps_free_pin(pin);
101 }
102
103
104 static void wps_free_pins(struct dl_list *pins)
105 {
106 struct wps_uuid_pin *pin, *prev;
107 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
108 wps_remove_pin(pin);
109 }
110
111
112 struct wps_pbc_session {
113 struct wps_pbc_session *next;
114 u8 addr[ETH_ALEN];
115 u8 uuid_e[WPS_UUID_LEN];
116 struct os_time timestamp;
117 };
118
119
120 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
121 {
122 struct wps_pbc_session *prev;
123
124 while (pbc) {
125 prev = pbc;
126 pbc = pbc->next;
127 os_free(prev);
128 }
129 }
130
131
132 struct wps_registrar_device {
133 struct wps_registrar_device *next;
134 struct wps_device_data dev;
135 u8 uuid[WPS_UUID_LEN];
136 };
137
138
139 struct wps_registrar {
140 struct wps_context *wps;
141
142 int pbc;
143 int selected_registrar;
144
145 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk,
146 size_t psk_len);
147 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
148 struct wpabuf *probe_resp_ie);
149 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
150 const struct wps_device_data *dev);
151 void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
152 const u8 *uuid_e, const u8 *dev_pw,
153 size_t dev_pw_len);
154 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
155 u16 sel_reg_config_methods);
156 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
157 const u8 *pri_dev_type, u16 config_methods,
158 u16 dev_password_id, u8 request_type,
159 const char *dev_name);
160 void *cb_ctx;
161
162 struct dl_list pins;
163 struct dl_list nfc_pw_tokens;
164 struct wps_pbc_session *pbc_sessions;
165
166 int skip_cred_build;
167 struct wpabuf *extra_cred;
168 int disable_auto_conf;
169 int sel_reg_union;
170 int sel_reg_dev_password_id_override;
171 int sel_reg_config_methods_override;
172 int static_wep_only;
173 int dualband;
174
175 struct wps_registrar_device *devices;
176
177 int force_pbc_overlap;
178
179 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
180 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
181
182 u8 p2p_dev_addr[ETH_ALEN];
183
184 u8 pbc_ignore_uuid[WPS_UUID_LEN];
185 struct os_time pbc_ignore_start;
186 };
187
188
189 static int wps_set_ie(struct wps_registrar *reg);
190 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
191 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
192 void *timeout_ctx);
193 static void wps_registrar_remove_pin(struct wps_registrar *reg,
194 struct wps_uuid_pin *pin);
195
196
197 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
198 const u8 *addr)
199 {
200 int i;
201 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
202 MAC2STR(addr));
203 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
204 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
205 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
206 "already in the list");
207 return; /* already in list */
208 }
209 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
210 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
211 ETH_ALEN);
212 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
213 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
214 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
215 }
216
217
218 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
219 const u8 *addr)
220 {
221 int i;
222 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
223 MAC2STR(addr));
224 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
225 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
226 break;
227 }
228 if (i == WPS_MAX_AUTHORIZED_MACS) {
229 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
230 "list");
231 return; /* not in the list */
232 }
233 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
234 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
235 ETH_ALEN);
236 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
237 ETH_ALEN);
238 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
239 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
240 }
241
242
243 static void wps_free_devices(struct wps_registrar_device *dev)
244 {
245 struct wps_registrar_device *prev;
246
247 while (dev) {
248 prev = dev;
249 dev = dev->next;
250 wps_device_data_free(&prev->dev);
251 os_free(prev);
252 }
253 }
254
255
256 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
257 const u8 *addr)
258 {
259 struct wps_registrar_device *dev;
260
261 for (dev = reg->devices; dev; dev = dev->next) {
262 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
263 return dev;
264 }
265 return NULL;
266 }
267
268
269 static void wps_device_clone_data(struct wps_device_data *dst,
270 struct wps_device_data *src)
271 {
272 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
273 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
274
275 #define WPS_STRDUP(n) \
276 os_free(dst->n); \
277 dst->n = src->n ? os_strdup(src->n) : NULL
278
279 WPS_STRDUP(device_name);
280 WPS_STRDUP(manufacturer);
281 WPS_STRDUP(model_name);
282 WPS_STRDUP(model_number);
283 WPS_STRDUP(serial_number);
284 #undef WPS_STRDUP
285 }
286
287
288 int wps_device_store(struct wps_registrar *reg,
289 struct wps_device_data *dev, const u8 *uuid)
290 {
291 struct wps_registrar_device *d;
292
293 d = wps_device_get(reg, dev->mac_addr);
294 if (d == NULL) {
295 d = os_zalloc(sizeof(*d));
296 if (d == NULL)
297 return -1;
298 d->next = reg->devices;
299 reg->devices = d;
300 }
301
302 wps_device_clone_data(&d->dev, dev);
303 os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
304
305 return 0;
306 }
307
308
309 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
310 const u8 *addr, const u8 *uuid_e)
311 {
312 struct wps_pbc_session *pbc, *prev = NULL;
313 struct os_time now;
314
315 os_get_time(&now);
316
317 pbc = reg->pbc_sessions;
318 while (pbc) {
319 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
320 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
321 if (prev)
322 prev->next = pbc->next;
323 else
324 reg->pbc_sessions = pbc->next;
325 break;
326 }
327 prev = pbc;
328 pbc = pbc->next;
329 }
330
331 if (!pbc) {
332 pbc = os_zalloc(sizeof(*pbc));
333 if (pbc == NULL)
334 return;
335 os_memcpy(pbc->addr, addr, ETH_ALEN);
336 if (uuid_e)
337 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
338 }
339
340 pbc->next = reg->pbc_sessions;
341 reg->pbc_sessions = pbc;
342 pbc->timestamp = now;
343
344 /* remove entries that have timed out */
345 prev = pbc;
346 pbc = pbc->next;
347
348 while (pbc) {
349 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
350 prev->next = NULL;
351 wps_free_pbc_sessions(pbc);
352 break;
353 }
354 prev = pbc;
355 pbc = pbc->next;
356 }
357 }
358
359
360 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
361 const u8 *uuid_e,
362 const u8 *p2p_dev_addr)
363 {
364 struct wps_pbc_session *pbc, *prev = NULL, *tmp;
365
366 pbc = reg->pbc_sessions;
367 while (pbc) {
368 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
369 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
370 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
371 0)) {
372 if (prev)
373 prev->next = pbc->next;
374 else
375 reg->pbc_sessions = pbc->next;
376 tmp = pbc;
377 pbc = pbc->next;
378 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
379 "addr=" MACSTR, MAC2STR(tmp->addr));
380 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
381 tmp->uuid_e, WPS_UUID_LEN);
382 os_free(tmp);
383 continue;
384 }
385 prev = pbc;
386 pbc = pbc->next;
387 }
388 }
389
390
391 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
392 const u8 *addr, const u8 *uuid_e)
393 {
394 int count = 0;
395 struct wps_pbc_session *pbc;
396 struct wps_pbc_session *first = NULL;
397 struct os_time now;
398
399 os_get_time(&now);
400
401 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
402
403 if (uuid_e) {
404 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
405 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
406 uuid_e, WPS_UUID_LEN);
407 count++;
408 }
409
410 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
411 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
412 MAC2STR(pbc->addr));
413 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
414 pbc->uuid_e, WPS_UUID_LEN);
415 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) {
416 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has "
417 "expired");
418 break;
419 }
420 if (first &&
421 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
422 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
423 continue; /* same Enrollee */
424 }
425 if (uuid_e == NULL ||
426 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
427 wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
428 count++;
429 }
430 if (first == NULL)
431 first = pbc;
432 }
433
434 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
435
436 return count > 1 ? 1 : 0;
437 }
438
439
440 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
441 {
442 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
443 wps->wps_state);
444 wpabuf_put_be16(msg, ATTR_WPS_STATE);
445 wpabuf_put_be16(msg, 1);
446 wpabuf_put_u8(msg, wps->wps_state);
447 return 0;
448 }
449
450
451 #ifdef CONFIG_WPS_UPNP
452 static void wps_registrar_free_pending_m2(struct wps_context *wps)
453 {
454 struct upnp_pending_message *p, *p2, *prev = NULL;
455 p = wps->upnp_msgs;
456 while (p) {
457 if (p->type == WPS_M2 || p->type == WPS_M2D) {
458 if (prev == NULL)
459 wps->upnp_msgs = p->next;
460 else
461 prev->next = p->next;
462 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
463 p2 = p;
464 p = p->next;
465 wpabuf_free(p2->msg);
466 os_free(p2);
467 continue;
468 }
469 prev = p;
470 p = p->next;
471 }
472 }
473 #endif /* CONFIG_WPS_UPNP */
474
475
476 static int wps_build_ap_setup_locked(struct wps_context *wps,
477 struct wpabuf *msg)
478 {
479 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
480 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
481 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
482 wpabuf_put_be16(msg, 1);
483 wpabuf_put_u8(msg, 1);
484 }
485 return 0;
486 }
487
488
489 static int wps_build_selected_registrar(struct wps_registrar *reg,
490 struct wpabuf *msg)
491 {
492 if (!reg->sel_reg_union)
493 return 0;
494 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
495 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
496 wpabuf_put_be16(msg, 1);
497 wpabuf_put_u8(msg, 1);
498 return 0;
499 }
500
501
502 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
503 struct wpabuf *msg)
504 {
505 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
506 if (!reg->sel_reg_union)
507 return 0;
508 if (reg->sel_reg_dev_password_id_override >= 0)
509 id = reg->sel_reg_dev_password_id_override;
510 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
511 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
512 wpabuf_put_be16(msg, 2);
513 wpabuf_put_be16(msg, id);
514 return 0;
515 }
516
517
518 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
519 struct wpabuf *msg)
520 {
521 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
522 if (!reg->sel_reg_union)
523 return 0;
524 if (reg->sel_reg_dev_password_id_override >= 0)
525 id = reg->sel_reg_dev_password_id_override;
526 if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
527 return 0;
528 return wps_build_uuid_e(msg, reg->wps->uuid);
529 }
530
531
532 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
533 {
534 *methods |= WPS_CONFIG_PUSHBUTTON;
535 #ifdef CONFIG_WPS2
536 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
537 WPS_CONFIG_VIRT_PUSHBUTTON)
538 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
539 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
540 WPS_CONFIG_PHY_PUSHBUTTON)
541 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
542 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
543 WPS_CONFIG_VIRT_PUSHBUTTON &&
544 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
545 WPS_CONFIG_PHY_PUSHBUTTON) {
546 /*
547 * Required to include virtual/physical flag, but we were not
548 * configured with push button type, so have to default to one
549 * of them.
550 */
551 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
552 }
553 #endif /* CONFIG_WPS2 */
554 }
555
556
557 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
558 struct wpabuf *msg)
559 {
560 u16 methods;
561 if (!reg->sel_reg_union)
562 return 0;
563 methods = reg->wps->config_methods;
564 methods &= ~WPS_CONFIG_PUSHBUTTON;
565 #ifdef CONFIG_WPS2
566 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
567 WPS_CONFIG_PHY_PUSHBUTTON);
568 #endif /* CONFIG_WPS2 */
569 if (reg->pbc)
570 wps_set_pushbutton(&methods, reg->wps->config_methods);
571 if (reg->sel_reg_config_methods_override >= 0)
572 methods = reg->sel_reg_config_methods_override;
573 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
574 methods);
575 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
576 wpabuf_put_be16(msg, 2);
577 wpabuf_put_be16(msg, methods);
578 return 0;
579 }
580
581
582 static int wps_build_probe_config_methods(struct wps_registrar *reg,
583 struct wpabuf *msg)
584 {
585 u16 methods;
586 /*
587 * These are the methods that the AP supports as an Enrollee for adding
588 * external Registrars.
589 */
590 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
591 #ifdef CONFIG_WPS2
592 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
593 WPS_CONFIG_PHY_PUSHBUTTON);
594 #endif /* CONFIG_WPS2 */
595 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
596 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
597 wpabuf_put_be16(msg, 2);
598 wpabuf_put_be16(msg, methods);
599 return 0;
600 }
601
602
603 static int wps_build_config_methods_r(struct wps_registrar *reg,
604 struct wpabuf *msg)
605 {
606 return wps_build_config_methods(msg, reg->wps->config_methods);
607 }
608
609
610 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
611 {
612 *count = 0;
613
614 #ifdef CONFIG_WPS2
615 while (*count < WPS_MAX_AUTHORIZED_MACS) {
616 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
617 break;
618 (*count)++;
619 }
620 #endif /* CONFIG_WPS2 */
621
622 return (const u8 *) reg->authorized_macs_union;
623 }
624
625
626 /**
627 * wps_registrar_init - Initialize WPS Registrar data
628 * @wps: Pointer to longterm WPS context
629 * @cfg: Registrar configuration
630 * Returns: Pointer to allocated Registrar data or %NULL on failure
631 *
632 * This function is used to initialize WPS Registrar functionality. It can be
633 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
634 * runs (e.g., when run as an internal Registrar in an AP). Caller is
635 * responsible for freeing the returned data with wps_registrar_deinit() when
636 * Registrar functionality is not needed anymore.
637 */
638 struct wps_registrar *
639 wps_registrar_init(struct wps_context *wps,
640 const struct wps_registrar_config *cfg)
641 {
642 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
643 if (reg == NULL)
644 return NULL;
645
646 dl_list_init(&reg->pins);
647 dl_list_init(&reg->nfc_pw_tokens);
648 reg->wps = wps;
649 reg->new_psk_cb = cfg->new_psk_cb;
650 reg->set_ie_cb = cfg->set_ie_cb;
651 reg->pin_needed_cb = cfg->pin_needed_cb;
652 reg->reg_success_cb = cfg->reg_success_cb;
653 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
654 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
655 reg->cb_ctx = cfg->cb_ctx;
656 reg->skip_cred_build = cfg->skip_cred_build;
657 if (cfg->extra_cred) {
658 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
659 cfg->extra_cred_len);
660 if (reg->extra_cred == NULL) {
661 os_free(reg);
662 return NULL;
663 }
664 }
665 reg->disable_auto_conf = cfg->disable_auto_conf;
666 reg->sel_reg_dev_password_id_override = -1;
667 reg->sel_reg_config_methods_override = -1;
668 reg->static_wep_only = cfg->static_wep_only;
669 reg->dualband = cfg->dualband;
670
671 if (wps_set_ie(reg)) {
672 wps_registrar_deinit(reg);
673 return NULL;
674 }
675
676 return reg;
677 }
678
679
680 /**
681 * wps_registrar_deinit - Deinitialize WPS Registrar data
682 * @reg: Registrar data from wps_registrar_init()
683 */
684 void wps_registrar_deinit(struct wps_registrar *reg)
685 {
686 if (reg == NULL)
687 return;
688 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
689 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
690 wps_free_pins(&reg->pins);
691 wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, 0);
692 wps_free_pbc_sessions(reg->pbc_sessions);
693 wpabuf_free(reg->extra_cred);
694 wps_free_devices(reg->devices);
695 os_free(reg);
696 }
697
698
699 static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
700 {
701 struct wps_uuid_pin *pin;
702
703 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
704 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
705 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
706 "configured wildcard PIN");
707 wps_registrar_remove_pin(reg, pin);
708 break;
709 }
710 }
711 }
712
713
714 /**
715 * wps_registrar_add_pin - Configure a new PIN for Registrar
716 * @reg: Registrar data from wps_registrar_init()
717 * @addr: Enrollee MAC address or %NULL if not known
718 * @uuid: UUID-E or %NULL for wildcard (any UUID)
719 * @pin: PIN (Device Password)
720 * @pin_len: Length of pin in octets
721 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
722 * Returns: 0 on success, -1 on failure
723 */
724 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
725 const u8 *uuid, const u8 *pin, size_t pin_len,
726 int timeout)
727 {
728 struct wps_uuid_pin *p;
729
730 p = os_zalloc(sizeof(*p));
731 if (p == NULL)
732 return -1;
733 if (addr)
734 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
735 if (uuid == NULL)
736 p->wildcard_uuid = 1;
737 else
738 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
739 p->pin = os_malloc(pin_len);
740 if (p->pin == NULL) {
741 os_free(p);
742 return -1;
743 }
744 os_memcpy(p->pin, pin, pin_len);
745 p->pin_len = pin_len;
746
747 if (timeout) {
748 p->flags |= PIN_EXPIRES;
749 os_get_time(&p->expiration);
750 p->expiration.sec += timeout;
751 }
752
753 if (p->wildcard_uuid)
754 wps_registrar_invalidate_unused(reg);
755
756 dl_list_add(&reg->pins, &p->list);
757
758 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
759 timeout);
760 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
761 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
762 reg->selected_registrar = 1;
763 reg->pbc = 0;
764 if (addr)
765 wps_registrar_add_authorized_mac(reg, addr);
766 else
767 wps_registrar_add_authorized_mac(
768 reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
769 wps_registrar_selected_registrar_changed(reg);
770 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
771 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
772 wps_registrar_set_selected_timeout,
773 reg, NULL);
774
775 return 0;
776 }
777
778
779 static void wps_registrar_remove_pin(struct wps_registrar *reg,
780 struct wps_uuid_pin *pin)
781 {
782 u8 *addr;
783 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
784
785 if (is_zero_ether_addr(pin->enrollee_addr))
786 addr = bcast;
787 else
788 addr = pin->enrollee_addr;
789 wps_registrar_remove_authorized_mac(reg, addr);
790 wps_remove_pin(pin);
791 wps_registrar_selected_registrar_changed(reg);
792 }
793
794
795 static void wps_registrar_expire_pins(struct wps_registrar *reg)
796 {
797 struct wps_uuid_pin *pin, *prev;
798 struct os_time now;
799
800 os_get_time(&now);
801 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
802 {
803 if ((pin->flags & PIN_EXPIRES) &&
804 os_time_before(&pin->expiration, &now)) {
805 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
806 pin->uuid, WPS_UUID_LEN);
807 wps_registrar_remove_pin(reg, pin);
808 }
809 }
810 }
811
812
813 /**
814 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
815 * @reg: Registrar data from wps_registrar_init()
816 * @dev_pw: PIN to search for or %NULL to match any
817 * @dev_pw_len: Length of dev_pw in octets
818 * Returns: 0 on success, -1 if not wildcard PIN is enabled
819 */
820 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
821 const u8 *dev_pw,
822 size_t dev_pw_len)
823 {
824 struct wps_uuid_pin *pin, *prev;
825
826 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
827 {
828 if (dev_pw && pin->pin &&
829 (dev_pw_len != pin->pin_len ||
830 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0))
831 continue; /* different PIN */
832 if (pin->wildcard_uuid) {
833 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
834 pin->uuid, WPS_UUID_LEN);
835 wps_registrar_remove_pin(reg, pin);
836 return 0;
837 }
838 }
839
840 return -1;
841 }
842
843
844 /**
845 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
846 * @reg: Registrar data from wps_registrar_init()
847 * @uuid: UUID-E
848 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
849 */
850 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
851 {
852 struct wps_uuid_pin *pin, *prev;
853
854 dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
855 {
856 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
857 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
858 pin->uuid, WPS_UUID_LEN);
859 wps_registrar_remove_pin(reg, pin);
860 return 0;
861 }
862 }
863
864 return -1;
865 }
866
867
868 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
869 const u8 *uuid, size_t *pin_len)
870 {
871 struct wps_uuid_pin *pin, *found = NULL;
872
873 wps_registrar_expire_pins(reg);
874
875 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
876 if (!pin->wildcard_uuid &&
877 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
878 found = pin;
879 break;
880 }
881 }
882
883 if (!found) {
884 /* Check for wildcard UUIDs since none of the UUID-specific
885 * PINs matched */
886 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
887 if (pin->wildcard_uuid == 1 ||
888 pin->wildcard_uuid == 2) {
889 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
890 "PIN. Assigned it for this UUID-E");
891 pin->wildcard_uuid++;
892 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
893 found = pin;
894 break;
895 }
896 }
897 }
898
899 if (!found)
900 return NULL;
901
902 /*
903 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
904 * that could otherwise avoid PIN invalidations.
905 */
906 if (found->flags & PIN_LOCKED) {
907 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
908 "allow concurrent re-use");
909 return NULL;
910 }
911 *pin_len = found->pin_len;
912 found->flags |= PIN_LOCKED;
913 return found->pin;
914 }
915
916
917 /**
918 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
919 * @reg: Registrar data from wps_registrar_init()
920 * @uuid: UUID-E
921 * Returns: 0 on success, -1 on failure
922 *
923 * PINs are locked to enforce only one concurrent use. This function unlocks a
924 * PIN to allow it to be used again. If the specified PIN was configured using
925 * a wildcard UUID, it will be removed instead of allowing multiple uses.
926 */
927 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
928 {
929 struct wps_uuid_pin *pin;
930
931 dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
932 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
933 if (pin->wildcard_uuid == 3) {
934 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
935 "wildcard PIN");
936 return wps_registrar_invalidate_pin(reg, uuid);
937 }
938 pin->flags &= ~PIN_LOCKED;
939 return 0;
940 }
941 }
942
943 return -1;
944 }
945
946
947 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
948 {
949 reg->selected_registrar = 0;
950 reg->pbc = 0;
951 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
952 wps_registrar_remove_authorized_mac(reg,
953 (u8 *) "\xff\xff\xff\xff\xff\xff");
954 wps_registrar_selected_registrar_changed(reg);
955 }
956
957
958 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
959 {
960 struct wps_registrar *reg = eloop_ctx;
961
962 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
963 wps_pbc_timeout_event(reg->wps);
964 wps_registrar_stop_pbc(reg);
965 }
966
967
968 /**
969 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
970 * @reg: Registrar data from wps_registrar_init()
971 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
972 * indicates no such filtering
973 * Returns: 0 on success, -1 on failure, -2 on session overlap
974 *
975 * This function is called on an AP when a push button is pushed to activate
976 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
977 * or when a PBC registration is completed. If more than one Enrollee in active
978 * PBC mode has been detected during the monitor time (previous 2 minutes), the
979 * PBC mode is not activated and -2 is returned to indicate session overlap.
980 * This is skipped if a specific Enrollee is selected.
981 */
982 int wps_registrar_button_pushed(struct wps_registrar *reg,
983 const u8 *p2p_dev_addr)
984 {
985 if (p2p_dev_addr == NULL &&
986 wps_registrar_pbc_overlap(reg, NULL, NULL)) {
987 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
988 "mode");
989 wps_pbc_overlap_event(reg->wps);
990 return -2;
991 }
992 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
993 reg->force_pbc_overlap = 0;
994 reg->selected_registrar = 1;
995 reg->pbc = 1;
996 if (p2p_dev_addr)
997 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
998 else
999 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1000 wps_registrar_add_authorized_mac(reg,
1001 (u8 *) "\xff\xff\xff\xff\xff\xff");
1002 wps_registrar_selected_registrar_changed(reg);
1003
1004 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1005 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1006 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1007 reg, NULL);
1008 return 0;
1009 }
1010
1011
1012 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1013 {
1014 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1015 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1016 wps_registrar_stop_pbc(reg);
1017 }
1018
1019
1020 static void wps_registrar_pin_completed(struct wps_registrar *reg)
1021 {
1022 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1023 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1024 reg->selected_registrar = 0;
1025 wps_registrar_selected_registrar_changed(reg);
1026 }
1027
1028
1029 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1030 const u8 *dev_pw, size_t dev_pw_len)
1031 {
1032 if (registrar->pbc) {
1033 wps_registrar_remove_pbc_session(registrar,
1034 uuid_e, NULL);
1035 wps_registrar_pbc_completed(registrar);
1036 os_get_time(&registrar->pbc_ignore_start);
1037 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1038 } else {
1039 wps_registrar_pin_completed(registrar);
1040 }
1041
1042 if (dev_pw &&
1043 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1044 dev_pw_len) == 0) {
1045 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1046 dev_pw, dev_pw_len);
1047 }
1048 }
1049
1050
1051 int wps_registrar_wps_cancel(struct wps_registrar *reg)
1052 {
1053 if (reg->pbc) {
1054 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1055 wps_registrar_pbc_timeout(reg, NULL);
1056 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1057 return 1;
1058 } else if (reg->selected_registrar) {
1059 /* PIN Method */
1060 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1061 wps_registrar_pin_completed(reg);
1062 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1063 return 1;
1064 }
1065 return 0;
1066 }
1067
1068
1069 /**
1070 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1071 * @reg: Registrar data from wps_registrar_init()
1072 * @addr: MAC address of the Probe Request sender
1073 * @wps_data: WPS IE contents
1074 *
1075 * This function is called on an AP when a Probe Request with WPS IE is
1076 * received. This is used to track PBC mode use and to detect possible overlap
1077 * situation with other WPS APs.
1078 */
1079 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1080 const struct wpabuf *wps_data,
1081 int p2p_wildcard)
1082 {
1083 struct wps_parse_attr attr;
1084 int skip_add = 0;
1085
1086 wpa_hexdump_buf(MSG_MSGDUMP,
1087 "WPS: Probe Request with WPS data received",
1088 wps_data);
1089
1090 if (wps_parse_msg(wps_data, &attr) < 0)
1091 return;
1092
1093 if (attr.config_methods == NULL) {
1094 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1095 "Probe Request");
1096 return;
1097 }
1098
1099 if (attr.dev_password_id == NULL) {
1100 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1101 "in Probe Request");
1102 return;
1103 }
1104
1105 if (reg->enrollee_seen_cb && attr.uuid_e &&
1106 attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1107 char *dev_name = NULL;
1108 if (attr.dev_name) {
1109 dev_name = os_zalloc(attr.dev_name_len + 1);
1110 if (dev_name) {
1111 os_memcpy(dev_name, attr.dev_name,
1112 attr.dev_name_len);
1113 }
1114 }
1115 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1116 attr.primary_dev_type,
1117 WPA_GET_BE16(attr.config_methods),
1118 WPA_GET_BE16(attr.dev_password_id),
1119 *attr.request_type, dev_name);
1120 os_free(dev_name);
1121 }
1122
1123 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1124 return; /* Not PBC */
1125
1126 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1127 MACSTR, MAC2STR(addr));
1128 if (attr.uuid_e == NULL) {
1129 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1130 "UUID-E included");
1131 return;
1132 }
1133 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1134 WPS_UUID_LEN);
1135
1136 #ifdef WPS_WORKAROUNDS
1137 if (reg->pbc_ignore_start.sec &&
1138 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1139 struct os_time now, dur;
1140 os_get_time(&now);
1141 os_time_sub(&now, &reg->pbc_ignore_start, &dur);
1142 if (dur.sec >= 0 && dur.sec < 5) {
1143 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1144 "based on Probe Request from the Enrollee "
1145 "that just completed PBC provisioning");
1146 skip_add = 1;
1147 } else
1148 reg->pbc_ignore_start.sec = 0;
1149 }
1150 #endif /* WPS_WORKAROUNDS */
1151
1152 if (!skip_add)
1153 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1154 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1155 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1156 reg->force_pbc_overlap = 1;
1157 wps_pbc_overlap_event(reg->wps);
1158 }
1159 }
1160
1161
1162 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1163 const u8 *psk, size_t psk_len)
1164 {
1165 if (reg->new_psk_cb == NULL)
1166 return 0;
1167
1168 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len);
1169 }
1170
1171
1172 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1173 const struct wps_device_data *dev)
1174 {
1175 if (reg->pin_needed_cb == NULL)
1176 return;
1177
1178 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1179 }
1180
1181
1182 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1183 const u8 *uuid_e, const u8 *dev_pw,
1184 size_t dev_pw_len)
1185 {
1186 if (reg->reg_success_cb == NULL)
1187 return;
1188
1189 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1190 }
1191
1192
1193 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1194 struct wpabuf *probe_resp_ie)
1195 {
1196 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1197 }
1198
1199
1200 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1201 {
1202 u16 methods = 0;
1203 if (reg->set_sel_reg_cb == NULL)
1204 return;
1205
1206 if (reg->selected_registrar) {
1207 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1208 #ifdef CONFIG_WPS2
1209 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1210 WPS_CONFIG_PHY_PUSHBUTTON);
1211 #endif /* CONFIG_WPS2 */
1212 if (reg->pbc)
1213 wps_set_pushbutton(&methods, reg->wps->config_methods);
1214 }
1215
1216 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1217 "config_methods=0x%x pbc=%d methods=0x%x",
1218 reg->selected_registrar, reg->wps->config_methods,
1219 reg->pbc, methods);
1220
1221 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1222 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1223 methods);
1224 }
1225
1226
1227 static int wps_set_ie(struct wps_registrar *reg)
1228 {
1229 struct wpabuf *beacon;
1230 struct wpabuf *probe;
1231 const u8 *auth_macs;
1232 size_t count;
1233 size_t vendor_len = 0;
1234 int i;
1235
1236 if (reg->set_ie_cb == NULL)
1237 return 0;
1238
1239 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1240 if (reg->wps->dev.vendor_ext[i]) {
1241 vendor_len += 2 + 2;
1242 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1243 }
1244 }
1245
1246 beacon = wpabuf_alloc(400 + vendor_len);
1247 if (beacon == NULL)
1248 return -1;
1249 probe = wpabuf_alloc(500 + vendor_len);
1250 if (probe == NULL) {
1251 wpabuf_free(beacon);
1252 return -1;
1253 }
1254
1255 auth_macs = wps_authorized_macs(reg, &count);
1256
1257 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1258
1259 if (wps_build_version(beacon) ||
1260 wps_build_wps_state(reg->wps, beacon) ||
1261 wps_build_ap_setup_locked(reg->wps, beacon) ||
1262 wps_build_selected_registrar(reg, beacon) ||
1263 wps_build_sel_reg_dev_password_id(reg, beacon) ||
1264 wps_build_sel_reg_config_methods(reg, beacon) ||
1265 wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1266 (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon)) ||
1267 wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1268 wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1269 wpabuf_free(beacon);
1270 wpabuf_free(probe);
1271 return -1;
1272 }
1273
1274 #ifdef CONFIG_P2P
1275 if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1276 wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1277 wpabuf_free(beacon);
1278 wpabuf_free(probe);
1279 return -1;
1280 }
1281 #endif /* CONFIG_P2P */
1282
1283 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1284
1285 if (wps_build_version(probe) ||
1286 wps_build_wps_state(reg->wps, probe) ||
1287 wps_build_ap_setup_locked(reg->wps, probe) ||
1288 wps_build_selected_registrar(reg, probe) ||
1289 wps_build_sel_reg_dev_password_id(reg, probe) ||
1290 wps_build_sel_reg_config_methods(reg, probe) ||
1291 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1292 WPS_RESP_REGISTRAR) ||
1293 wps_build_uuid_e(probe, reg->wps->uuid) ||
1294 wps_build_device_attrs(&reg->wps->dev, probe) ||
1295 wps_build_probe_config_methods(reg, probe) ||
1296 (reg->dualband && wps_build_rf_bands(&reg->wps->dev, probe)) ||
1297 wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1298 wps_build_vendor_ext(&reg->wps->dev, probe)) {
1299 wpabuf_free(beacon);
1300 wpabuf_free(probe);
1301 return -1;
1302 }
1303
1304 beacon = wps_ie_encapsulate(beacon);
1305 probe = wps_ie_encapsulate(probe);
1306
1307 if (!beacon || !probe) {
1308 wpabuf_free(beacon);
1309 wpabuf_free(probe);
1310 return -1;
1311 }
1312
1313 if (reg->static_wep_only) {
1314 /*
1315 * Windows XP and Vista clients can get confused about
1316 * EAP-Identity/Request when they probe the network with
1317 * EAPOL-Start. In such a case, they may assume the network is
1318 * using IEEE 802.1X and prompt user for a certificate while
1319 * the correct (non-WPS) behavior would be to ask for the
1320 * static WEP key. As a workaround, use Microsoft Provisioning
1321 * IE to advertise that legacy 802.1X is not supported.
1322 */
1323 const u8 ms_wps[7] = {
1324 WLAN_EID_VENDOR_SPECIFIC, 5,
1325 /* Microsoft Provisioning IE (00:50:f2:5) */
1326 0x00, 0x50, 0xf2, 5,
1327 0x00 /* no legacy 802.1X or MS WPS */
1328 };
1329 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1330 "into Beacon/Probe Response frames");
1331 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1332 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1333 }
1334
1335 return wps_cb_set_ie(reg, beacon, probe);
1336 }
1337
1338
1339 static int wps_get_dev_password(struct wps_data *wps)
1340 {
1341 const u8 *pin;
1342 size_t pin_len = 0;
1343
1344 os_free(wps->dev_password);
1345 wps->dev_password = NULL;
1346
1347 if (wps->pbc) {
1348 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1349 pin = (const u8 *) "00000000";
1350 pin_len = 8;
1351 #ifdef CONFIG_WPS_NFC
1352 } else if (wps->nfc_pw_token) {
1353 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1354 "Password Token");
1355 pin = wps->nfc_pw_token->dev_pw;
1356 pin_len = wps->nfc_pw_token->dev_pw_len;
1357 #endif /* CONFIG_WPS_NFC */
1358 } else {
1359 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1360 &pin_len);
1361 }
1362 if (pin == NULL) {
1363 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1364 "the Enrollee");
1365 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1366 &wps->peer_dev);
1367 return -1;
1368 }
1369
1370 wps->dev_password = os_malloc(pin_len);
1371 if (wps->dev_password == NULL)
1372 return -1;
1373 os_memcpy(wps->dev_password, pin, pin_len);
1374 wps->dev_password_len = pin_len;
1375
1376 return 0;
1377 }
1378
1379
1380 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1381 {
1382 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1383 wpabuf_put_be16(msg, ATTR_UUID_R);
1384 wpabuf_put_be16(msg, WPS_UUID_LEN);
1385 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1386 return 0;
1387 }
1388
1389
1390 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1391 {
1392 u8 *hash;
1393 const u8 *addr[4];
1394 size_t len[4];
1395
1396 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1397 return -1;
1398 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1399 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1400 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1401
1402 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1403 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1404 "R-Hash derivation");
1405 return -1;
1406 }
1407
1408 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1409 wpabuf_put_be16(msg, ATTR_R_HASH1);
1410 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1411 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1412 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1413 addr[0] = wps->snonce;
1414 len[0] = WPS_SECRET_NONCE_LEN;
1415 addr[1] = wps->psk1;
1416 len[1] = WPS_PSK_LEN;
1417 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1418 len[2] = wpabuf_len(wps->dh_pubkey_e);
1419 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1420 len[3] = wpabuf_len(wps->dh_pubkey_r);
1421 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1422 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1423
1424 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1425 wpabuf_put_be16(msg, ATTR_R_HASH2);
1426 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1427 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1428 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1429 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1430 addr[1] = wps->psk2;
1431 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1432 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1433
1434 return 0;
1435 }
1436
1437
1438 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1439 {
1440 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1441 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1442 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1443 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1444 return 0;
1445 }
1446
1447
1448 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1449 {
1450 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1451 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1452 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1453 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1454 WPS_SECRET_NONCE_LEN);
1455 return 0;
1456 }
1457
1458
1459 static int wps_build_cred_network_idx(struct wpabuf *msg,
1460 const struct wps_credential *cred)
1461 {
1462 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1463 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1464 wpabuf_put_be16(msg, 1);
1465 wpabuf_put_u8(msg, 1);
1466 return 0;
1467 }
1468
1469
1470 static int wps_build_cred_ssid(struct wpabuf *msg,
1471 const struct wps_credential *cred)
1472 {
1473 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1474 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1475 cred->ssid, cred->ssid_len);
1476 wpabuf_put_be16(msg, ATTR_SSID);
1477 wpabuf_put_be16(msg, cred->ssid_len);
1478 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1479 return 0;
1480 }
1481
1482
1483 static int wps_build_cred_auth_type(struct wpabuf *msg,
1484 const struct wps_credential *cred)
1485 {
1486 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1487 cred->auth_type);
1488 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1489 wpabuf_put_be16(msg, 2);
1490 wpabuf_put_be16(msg, cred->auth_type);
1491 return 0;
1492 }
1493
1494
1495 static int wps_build_cred_encr_type(struct wpabuf *msg,
1496 const struct wps_credential *cred)
1497 {
1498 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1499 cred->encr_type);
1500 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1501 wpabuf_put_be16(msg, 2);
1502 wpabuf_put_be16(msg, cred->encr_type);
1503 return 0;
1504 }
1505
1506
1507 static int wps_build_cred_network_key(struct wpabuf *msg,
1508 const struct wps_credential *cred)
1509 {
1510 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1511 (int) cred->key_len);
1512 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1513 cred->key, cred->key_len);
1514 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1515 wpabuf_put_be16(msg, cred->key_len);
1516 wpabuf_put_data(msg, cred->key, cred->key_len);
1517 return 0;
1518 }
1519
1520
1521 static int wps_build_cred_mac_addr(struct wpabuf *msg,
1522 const struct wps_credential *cred)
1523 {
1524 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")",
1525 MAC2STR(cred->mac_addr));
1526 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
1527 wpabuf_put_be16(msg, ETH_ALEN);
1528 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN);
1529 return 0;
1530 }
1531
1532
1533 static int wps_build_credential(struct wpabuf *msg,
1534 const struct wps_credential *cred)
1535 {
1536 if (wps_build_cred_network_idx(msg, cred) ||
1537 wps_build_cred_ssid(msg, cred) ||
1538 wps_build_cred_auth_type(msg, cred) ||
1539 wps_build_cred_encr_type(msg, cred) ||
1540 wps_build_cred_network_key(msg, cred) ||
1541 wps_build_cred_mac_addr(msg, cred))
1542 return -1;
1543 return 0;
1544 }
1545
1546
1547 int wps_build_credential_wrap(struct wpabuf *msg,
1548 const struct wps_credential *cred)
1549 {
1550 struct wpabuf *wbuf;
1551 wbuf = wpabuf_alloc(200);
1552 if (wbuf == NULL)
1553 return -1;
1554 if (wps_build_credential(wbuf, cred)) {
1555 wpabuf_free(wbuf);
1556 return -1;
1557 }
1558 wpabuf_put_be16(msg, ATTR_CRED);
1559 wpabuf_put_be16(msg, wpabuf_len(wbuf));
1560 wpabuf_put_buf(msg, wbuf);
1561 wpabuf_free(wbuf);
1562 return 0;
1563 }
1564
1565
1566 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1567 {
1568 struct wpabuf *cred;
1569
1570 if (wps->wps->registrar->skip_cred_build)
1571 goto skip_cred_build;
1572
1573 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1574 if (wps->use_cred) {
1575 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1576 goto use_provided;
1577 }
1578 os_memset(&wps->cred, 0, sizeof(wps->cred));
1579
1580 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1581 wps->cred.ssid_len = wps->wps->ssid_len;
1582
1583 /* Select the best authentication and encryption type */
1584 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1585 wps->auth_type = WPS_AUTH_WPA2PSK;
1586 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1587 wps->auth_type = WPS_AUTH_WPAPSK;
1588 else if (wps->auth_type & WPS_AUTH_OPEN)
1589 wps->auth_type = WPS_AUTH_OPEN;
1590 else if (wps->auth_type & WPS_AUTH_SHARED)
1591 wps->auth_type = WPS_AUTH_SHARED;
1592 else {
1593 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1594 wps->auth_type);
1595 return -1;
1596 }
1597 wps->cred.auth_type = wps->auth_type;
1598
1599 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1600 wps->auth_type == WPS_AUTH_WPAPSK) {
1601 if (wps->encr_type & WPS_ENCR_AES)
1602 wps->encr_type = WPS_ENCR_AES;
1603 else if (wps->encr_type & WPS_ENCR_TKIP)
1604 wps->encr_type = WPS_ENCR_TKIP;
1605 else {
1606 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1607 "type for WPA/WPA2");
1608 return -1;
1609 }
1610 } else {
1611 if (wps->encr_type & WPS_ENCR_WEP)
1612 wps->encr_type = WPS_ENCR_WEP;
1613 else if (wps->encr_type & WPS_ENCR_NONE)
1614 wps->encr_type = WPS_ENCR_NONE;
1615 else {
1616 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1617 "type for non-WPA/WPA2 mode");
1618 return -1;
1619 }
1620 }
1621 wps->cred.encr_type = wps->encr_type;
1622 /*
1623 * Set MAC address in the Credential to be the Enrollee's MAC address
1624 */
1625 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1626
1627 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1628 !wps->wps->registrar->disable_auto_conf) {
1629 u8 r[16];
1630 /* Generate a random passphrase */
1631 if (random_get_bytes(r, sizeof(r)) < 0)
1632 return -1;
1633 os_free(wps->new_psk);
1634 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1635 if (wps->new_psk == NULL)
1636 return -1;
1637 wps->new_psk_len--; /* remove newline */
1638 while (wps->new_psk_len &&
1639 wps->new_psk[wps->new_psk_len - 1] == '=')
1640 wps->new_psk_len--;
1641 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1642 wps->new_psk, wps->new_psk_len);
1643 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1644 wps->cred.key_len = wps->new_psk_len;
1645 } else if (wps->use_psk_key && wps->wps->psk_set) {
1646 char hex[65];
1647 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1648 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1649 os_memcpy(wps->cred.key, hex, 32 * 2);
1650 wps->cred.key_len = 32 * 2;
1651 } else if (wps->wps->network_key) {
1652 os_memcpy(wps->cred.key, wps->wps->network_key,
1653 wps->wps->network_key_len);
1654 wps->cred.key_len = wps->wps->network_key_len;
1655 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1656 char hex[65];
1657 /* Generate a random per-device PSK */
1658 os_free(wps->new_psk);
1659 wps->new_psk_len = 32;
1660 wps->new_psk = os_malloc(wps->new_psk_len);
1661 if (wps->new_psk == NULL)
1662 return -1;
1663 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1664 os_free(wps->new_psk);
1665 wps->new_psk = NULL;
1666 return -1;
1667 }
1668 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1669 wps->new_psk, wps->new_psk_len);
1670 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1671 wps->new_psk_len);
1672 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1673 wps->cred.key_len = wps->new_psk_len * 2;
1674 }
1675
1676 use_provided:
1677 #ifdef CONFIG_WPS_TESTING
1678 if (wps_testing_dummy_cred)
1679 cred = wpabuf_alloc(200);
1680 else
1681 cred = NULL;
1682 if (cred) {
1683 struct wps_credential dummy;
1684 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1685 os_memset(&dummy, 0, sizeof(dummy));
1686 os_memcpy(dummy.ssid, "dummy", 5);
1687 dummy.ssid_len = 5;
1688 dummy.auth_type = WPS_AUTH_WPA2PSK;
1689 dummy.encr_type = WPS_ENCR_AES;
1690 os_memcpy(dummy.key, "dummy psk", 9);
1691 dummy.key_len = 9;
1692 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1693 wps_build_credential(cred, &dummy);
1694 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1695
1696 wpabuf_put_be16(msg, ATTR_CRED);
1697 wpabuf_put_be16(msg, wpabuf_len(cred));
1698 wpabuf_put_buf(msg, cred);
1699
1700 wpabuf_free(cred);
1701 }
1702 #endif /* CONFIG_WPS_TESTING */
1703
1704 cred = wpabuf_alloc(200);
1705 if (cred == NULL)
1706 return -1;
1707
1708 if (wps_build_credential(cred, &wps->cred)) {
1709 wpabuf_free(cred);
1710 return -1;
1711 }
1712
1713 wpabuf_put_be16(msg, ATTR_CRED);
1714 wpabuf_put_be16(msg, wpabuf_len(cred));
1715 wpabuf_put_buf(msg, cred);
1716 wpabuf_free(cred);
1717
1718 skip_cred_build:
1719 if (wps->wps->registrar->extra_cred) {
1720 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1721 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1722 }
1723
1724 return 0;
1725 }
1726
1727
1728 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1729 {
1730 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1731
1732 if (wps_build_credential(msg, &wps->cred))
1733 return -1;
1734
1735 return 0;
1736 }
1737
1738
1739 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1740 {
1741 struct wpabuf *msg, *plain;
1742
1743 msg = wpabuf_alloc(1000);
1744 if (msg == NULL)
1745 return NULL;
1746
1747 plain = wpabuf_alloc(200);
1748 if (plain == NULL) {
1749 wpabuf_free(msg);
1750 return NULL;
1751 }
1752
1753 if (wps_build_ap_settings(wps, plain)) {
1754 wpabuf_free(plain);
1755 wpabuf_free(msg);
1756 return NULL;
1757 }
1758
1759 wpabuf_put_be16(msg, ATTR_CRED);
1760 wpabuf_put_be16(msg, wpabuf_len(plain));
1761 wpabuf_put_buf(msg, plain);
1762 wpabuf_free(plain);
1763
1764 return msg;
1765 }
1766
1767
1768 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1769 {
1770 struct wpabuf *msg;
1771
1772 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1773 return NULL;
1774 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1775 wps->nonce_r, WPS_NONCE_LEN);
1776 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1777
1778 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1779 msg = wpabuf_alloc(1000);
1780 if (msg == NULL)
1781 return NULL;
1782
1783 if (wps_build_version(msg) ||
1784 wps_build_msg_type(msg, WPS_M2) ||
1785 wps_build_enrollee_nonce(wps, msg) ||
1786 wps_build_registrar_nonce(wps, msg) ||
1787 wps_build_uuid_r(wps, msg) ||
1788 wps_build_public_key(wps, msg) ||
1789 wps_derive_keys(wps) ||
1790 wps_build_auth_type_flags(wps, msg) ||
1791 wps_build_encr_type_flags(wps, msg) ||
1792 wps_build_conn_type_flags(wps, msg) ||
1793 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1794 wps_build_device_attrs(&wps->wps->dev, msg) ||
1795 wps_build_rf_bands(&wps->wps->dev, msg) ||
1796 wps_build_assoc_state(wps, msg) ||
1797 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1798 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1799 wps_build_os_version(&wps->wps->dev, msg) ||
1800 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1801 wps_build_authenticator(wps, msg)) {
1802 wpabuf_free(msg);
1803 return NULL;
1804 }
1805
1806 wps->int_reg = 1;
1807 wps->state = RECV_M3;
1808 return msg;
1809 }
1810
1811
1812 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1813 {
1814 struct wpabuf *msg;
1815 u16 err = wps->config_error;
1816
1817 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1818 msg = wpabuf_alloc(1000);
1819 if (msg == NULL)
1820 return NULL;
1821
1822 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1823 err == WPS_CFG_NO_ERROR)
1824 err = WPS_CFG_SETUP_LOCKED;
1825
1826 if (wps_build_version(msg) ||
1827 wps_build_msg_type(msg, WPS_M2D) ||
1828 wps_build_enrollee_nonce(wps, msg) ||
1829 wps_build_registrar_nonce(wps, msg) ||
1830 wps_build_uuid_r(wps, msg) ||
1831 wps_build_auth_type_flags(wps, msg) ||
1832 wps_build_encr_type_flags(wps, msg) ||
1833 wps_build_conn_type_flags(wps, msg) ||
1834 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1835 wps_build_device_attrs(&wps->wps->dev, msg) ||
1836 wps_build_rf_bands(&wps->wps->dev, msg) ||
1837 wps_build_assoc_state(wps, msg) ||
1838 wps_build_config_error(msg, err) ||
1839 wps_build_os_version(&wps->wps->dev, msg) ||
1840 wps_build_wfa_ext(msg, 0, NULL, 0)) {
1841 wpabuf_free(msg);
1842 return NULL;
1843 }
1844
1845 wps->state = RECV_M2D_ACK;
1846 return msg;
1847 }
1848
1849
1850 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1851 {
1852 struct wpabuf *msg, *plain;
1853
1854 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1855
1856 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1857
1858 plain = wpabuf_alloc(200);
1859 if (plain == NULL)
1860 return NULL;
1861
1862 msg = wpabuf_alloc(1000);
1863 if (msg == NULL) {
1864 wpabuf_free(plain);
1865 return NULL;
1866 }
1867
1868 if (wps_build_version(msg) ||
1869 wps_build_msg_type(msg, WPS_M4) ||
1870 wps_build_enrollee_nonce(wps, msg) ||
1871 wps_build_r_hash(wps, msg) ||
1872 wps_build_r_snonce1(wps, plain) ||
1873 wps_build_key_wrap_auth(wps, plain) ||
1874 wps_build_encr_settings(wps, msg, plain) ||
1875 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1876 wps_build_authenticator(wps, msg)) {
1877 wpabuf_free(plain);
1878 wpabuf_free(msg);
1879 return NULL;
1880 }
1881 wpabuf_free(plain);
1882
1883 wps->state = RECV_M5;
1884 return msg;
1885 }
1886
1887
1888 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1889 {
1890 struct wpabuf *msg, *plain;
1891
1892 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1893
1894 plain = wpabuf_alloc(200);
1895 if (plain == NULL)
1896 return NULL;
1897
1898 msg = wpabuf_alloc(1000);
1899 if (msg == NULL) {
1900 wpabuf_free(plain);
1901 return NULL;
1902 }
1903
1904 if (wps_build_version(msg) ||
1905 wps_build_msg_type(msg, WPS_M6) ||
1906 wps_build_enrollee_nonce(wps, msg) ||
1907 wps_build_r_snonce2(wps, plain) ||
1908 wps_build_key_wrap_auth(wps, plain) ||
1909 wps_build_encr_settings(wps, msg, plain) ||
1910 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1911 wps_build_authenticator(wps, msg)) {
1912 wpabuf_free(plain);
1913 wpabuf_free(msg);
1914 return NULL;
1915 }
1916 wpabuf_free(plain);
1917
1918 wps->wps_pin_revealed = 1;
1919 wps->state = RECV_M7;
1920 return msg;
1921 }
1922
1923
1924 static struct wpabuf * wps_build_m8(struct wps_data *wps)
1925 {
1926 struct wpabuf *msg, *plain;
1927
1928 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1929
1930 plain = wpabuf_alloc(500);
1931 if (plain == NULL)
1932 return NULL;
1933
1934 msg = wpabuf_alloc(1000);
1935 if (msg == NULL) {
1936 wpabuf_free(plain);
1937 return NULL;
1938 }
1939
1940 if (wps_build_version(msg) ||
1941 wps_build_msg_type(msg, WPS_M8) ||
1942 wps_build_enrollee_nonce(wps, msg) ||
1943 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1944 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1945 wps_build_key_wrap_auth(wps, plain) ||
1946 wps_build_encr_settings(wps, msg, plain) ||
1947 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1948 wps_build_authenticator(wps, msg)) {
1949 wpabuf_free(plain);
1950 wpabuf_free(msg);
1951 return NULL;
1952 }
1953 wpabuf_free(plain);
1954
1955 wps->state = RECV_DONE;
1956 return msg;
1957 }
1958
1959
1960 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
1961 enum wsc_op_code *op_code)
1962 {
1963 struct wpabuf *msg;
1964
1965 #ifdef CONFIG_WPS_UPNP
1966 if (!wps->int_reg && wps->wps->wps_upnp) {
1967 struct upnp_pending_message *p, *prev = NULL;
1968 if (wps->ext_reg > 1)
1969 wps_registrar_free_pending_m2(wps->wps);
1970 p = wps->wps->upnp_msgs;
1971 /* TODO: check pending message MAC address */
1972 while (p && p->next) {
1973 prev = p;
1974 p = p->next;
1975 }
1976 if (p) {
1977 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
1978 "UPnP");
1979 if (prev)
1980 prev->next = NULL;
1981 else
1982 wps->wps->upnp_msgs = NULL;
1983 msg = p->msg;
1984 switch (p->type) {
1985 case WPS_WSC_ACK:
1986 *op_code = WSC_ACK;
1987 break;
1988 case WPS_WSC_NACK:
1989 *op_code = WSC_NACK;
1990 break;
1991 default:
1992 *op_code = WSC_MSG;
1993 break;
1994 }
1995 os_free(p);
1996 if (wps->ext_reg == 0)
1997 wps->ext_reg = 1;
1998 return msg;
1999 }
2000 }
2001 if (wps->ext_reg) {
2002 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2003 "pending message available");
2004 return NULL;
2005 }
2006 #endif /* CONFIG_WPS_UPNP */
2007
2008 switch (wps->state) {
2009 case SEND_M2:
2010 if (wps_get_dev_password(wps) < 0)
2011 msg = wps_build_m2d(wps);
2012 else
2013 msg = wps_build_m2(wps);
2014 *op_code = WSC_MSG;
2015 break;
2016 case SEND_M2D:
2017 msg = wps_build_m2d(wps);
2018 *op_code = WSC_MSG;
2019 break;
2020 case SEND_M4:
2021 msg = wps_build_m4(wps);
2022 *op_code = WSC_MSG;
2023 break;
2024 case SEND_M6:
2025 msg = wps_build_m6(wps);
2026 *op_code = WSC_MSG;
2027 break;
2028 case SEND_M8:
2029 msg = wps_build_m8(wps);
2030 *op_code = WSC_MSG;
2031 break;
2032 case RECV_DONE:
2033 msg = wps_build_wsc_ack(wps);
2034 *op_code = WSC_ACK;
2035 break;
2036 case SEND_WSC_NACK:
2037 msg = wps_build_wsc_nack(wps);
2038 *op_code = WSC_NACK;
2039 break;
2040 default:
2041 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2042 "a message", wps->state);
2043 msg = NULL;
2044 break;
2045 }
2046
2047 if (*op_code == WSC_MSG && msg) {
2048 /* Save a copy of the last message for Authenticator derivation
2049 */
2050 wpabuf_free(wps->last_msg);
2051 wps->last_msg = wpabuf_dup(msg);
2052 }
2053
2054 return msg;
2055 }
2056
2057
2058 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2059 {
2060 if (e_nonce == NULL) {
2061 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2062 return -1;
2063 }
2064
2065 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2066 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2067 wps->nonce_e, WPS_NONCE_LEN);
2068
2069 return 0;
2070 }
2071
2072
2073 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2074 {
2075 if (r_nonce == NULL) {
2076 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2077 return -1;
2078 }
2079
2080 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2081 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2082 return -1;
2083 }
2084
2085 return 0;
2086 }
2087
2088
2089 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2090 {
2091 if (uuid_e == NULL) {
2092 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2093 return -1;
2094 }
2095
2096 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2097 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2098
2099 return 0;
2100 }
2101
2102
2103 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2104 {
2105 if (pw_id == NULL) {
2106 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2107 return -1;
2108 }
2109
2110 wps->dev_pw_id = WPA_GET_BE16(pw_id);
2111 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2112
2113 return 0;
2114 }
2115
2116
2117 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2118 {
2119 if (e_hash1 == NULL) {
2120 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2121 return -1;
2122 }
2123
2124 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2125 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2126
2127 return 0;
2128 }
2129
2130
2131 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2132 {
2133 if (e_hash2 == NULL) {
2134 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2135 return -1;
2136 }
2137
2138 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2139 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2140
2141 return 0;
2142 }
2143
2144
2145 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2146 {
2147 u8 hash[SHA256_MAC_LEN];
2148 const u8 *addr[4];
2149 size_t len[4];
2150
2151 if (e_snonce1 == NULL) {
2152 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2153 return -1;
2154 }
2155
2156 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2157 WPS_SECRET_NONCE_LEN);
2158
2159 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2160 addr[0] = e_snonce1;
2161 len[0] = WPS_SECRET_NONCE_LEN;
2162 addr[1] = wps->psk1;
2163 len[1] = WPS_PSK_LEN;
2164 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2165 len[2] = wpabuf_len(wps->dh_pubkey_e);
2166 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2167 len[3] = wpabuf_len(wps->dh_pubkey_r);
2168 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2169
2170 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2171 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2172 "not match with the pre-committed value");
2173 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2174 wps_pwd_auth_fail_event(wps->wps, 0, 1);
2175 return -1;
2176 }
2177
2178 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2179 "half of the device password");
2180
2181 return 0;
2182 }
2183
2184
2185 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2186 {
2187 u8 hash[SHA256_MAC_LEN];
2188 const u8 *addr[4];
2189 size_t len[4];
2190
2191 if (e_snonce2 == NULL) {
2192 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2193 return -1;
2194 }
2195
2196 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2197 WPS_SECRET_NONCE_LEN);
2198
2199 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2200 addr[0] = e_snonce2;
2201 len[0] = WPS_SECRET_NONCE_LEN;
2202 addr[1] = wps->psk2;
2203 len[1] = WPS_PSK_LEN;
2204 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2205 len[2] = wpabuf_len(wps->dh_pubkey_e);
2206 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2207 len[3] = wpabuf_len(wps->dh_pubkey_r);
2208 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2209
2210 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2211 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2212 "not match with the pre-committed value");
2213 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2214 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2215 wps_pwd_auth_fail_event(wps->wps, 0, 2);
2216 return -1;
2217 }
2218
2219 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2220 "half of the device password");
2221 wps->wps_pin_revealed = 0;
2222 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2223
2224 /*
2225 * In case wildcard PIN is used and WPS handshake succeeds in the first
2226 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2227 * sure the PIN gets invalidated here.
2228 */
2229 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2230
2231 return 0;
2232 }
2233
2234
2235 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2236 {
2237 if (mac_addr == NULL) {
2238 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2239 return -1;
2240 }
2241
2242 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2243 MAC2STR(mac_addr));
2244 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2245 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2246
2247 return 0;
2248 }
2249
2250
2251 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2252 size_t pk_len)
2253 {
2254 if (pk == NULL || pk_len == 0) {
2255 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2256 return -1;
2257 }
2258
2259 wpabuf_free(wps->dh_pubkey_e);
2260 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2261 if (wps->dh_pubkey_e == NULL)
2262 return -1;
2263
2264 return 0;
2265 }
2266
2267
2268 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2269 {
2270 u16 auth_types;
2271
2272 if (auth == NULL) {
2273 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2274 "received");
2275 return -1;
2276 }
2277
2278 auth_types = WPA_GET_BE16(auth);
2279
2280 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2281 auth_types);
2282 wps->auth_type = wps->wps->auth_types & auth_types;
2283 if (wps->auth_type == 0) {
2284 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2285 "authentication types (own 0x%x Enrollee 0x%x)",
2286 wps->wps->auth_types, auth_types);
2287 #ifdef WPS_WORKAROUNDS
2288 /*
2289 * Some deployed implementations seem to advertise incorrect
2290 * information in this attribute. For example, Linksys WRT350N
2291 * seems to have a byteorder bug that breaks this negotiation.
2292 * In order to interoperate with existing implementations,
2293 * assume that the Enrollee supports everything we do.
2294 */
2295 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2296 "does not advertise supported authentication types "
2297 "correctly");
2298 wps->auth_type = wps->wps->auth_types;
2299 #else /* WPS_WORKAROUNDS */
2300 return -1;
2301 #endif /* WPS_WORKAROUNDS */
2302 }
2303
2304 return 0;
2305 }
2306
2307
2308 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2309 {
2310 u16 encr_types;
2311
2312 if (encr == NULL) {
2313 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2314 "received");
2315 return -1;
2316 }
2317
2318 encr_types = WPA_GET_BE16(encr);
2319
2320 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2321 encr_types);
2322 wps->encr_type = wps->wps->encr_types & encr_types;
2323 if (wps->encr_type == 0) {
2324 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2325 "encryption types (own 0x%x Enrollee 0x%x)",
2326 wps->wps->encr_types, encr_types);
2327 #ifdef WPS_WORKAROUNDS
2328 /*
2329 * Some deployed implementations seem to advertise incorrect
2330 * information in this attribute. For example, Linksys WRT350N
2331 * seems to have a byteorder bug that breaks this negotiation.
2332 * In order to interoperate with existing implementations,
2333 * assume that the Enrollee supports everything we do.
2334 */
2335 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2336 "does not advertise supported encryption types "
2337 "correctly");
2338 wps->encr_type = wps->wps->encr_types;
2339 #else /* WPS_WORKAROUNDS */
2340 return -1;
2341 #endif /* WPS_WORKAROUNDS */
2342 }
2343
2344 return 0;
2345 }
2346
2347
2348 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2349 {
2350 if (conn == NULL) {
2351 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2352 "received");
2353 return -1;
2354 }
2355
2356 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2357 *conn);
2358
2359 return 0;
2360 }
2361
2362
2363 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2364 {
2365 u16 m;
2366
2367 if (methods == NULL) {
2368 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2369 return -1;
2370 }
2371
2372 m = WPA_GET_BE16(methods);
2373
2374 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2375 "%s%s%s%s%s%s%s%s%s", m,
2376 m & WPS_CONFIG_USBA ? " [USBA]" : "",
2377 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2378 m & WPS_CONFIG_LABEL ? " [Label]" : "",
2379 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2380 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2381 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2382 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2383 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2384 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2385
2386 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2387 /*
2388 * The Enrollee does not have a display so it is unlikely to be
2389 * able to show the passphrase to a user and as such, could
2390 * benefit from receiving PSK to reduce key derivation time.
2391 */
2392 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2393 "Enrollee not supporting display");
2394 wps->use_psk_key = 1;
2395 }
2396
2397 return 0;
2398 }
2399
2400
2401 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2402 {
2403 if (state == NULL) {
2404 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2405 "received");
2406 return -1;
2407 }
2408
2409 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2410 *state);
2411
2412 return 0;
2413 }
2414
2415
2416 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2417 {
2418 u16 a;
2419
2420 if (assoc == NULL) {
2421 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2422 return -1;
2423 }
2424
2425 a = WPA_GET_BE16(assoc);
2426 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2427
2428 return 0;
2429 }
2430
2431
2432 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2433 {
2434 u16 e;
2435
2436 if (err == NULL) {
2437 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2438 return -1;
2439 }
2440
2441 e = WPA_GET_BE16(err);
2442 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2443
2444 return 0;
2445 }
2446
2447
2448 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2449 {
2450 #ifdef CONFIG_P2P
2451 struct wps_registrar *reg = wps->wps->registrar;
2452
2453 if (is_zero_ether_addr(reg->p2p_dev_addr))
2454 return 1; /* no filtering in use */
2455
2456 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2457 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2458 "filtering for PBC: expected " MACSTR " was "
2459 MACSTR " - indicate PBC session overlap",
2460 MAC2STR(reg->p2p_dev_addr),
2461 MAC2STR(wps->p2p_dev_addr));
2462 return 0;
2463 }
2464 #endif /* CONFIG_P2P */
2465 return 1;
2466 }
2467
2468
2469 static int wps_registrar_skip_overlap(struct wps_data *wps)
2470 {
2471 #ifdef CONFIG_P2P
2472 struct wps_registrar *reg = wps->wps->registrar;
2473
2474 if (is_zero_ether_addr(reg->p2p_dev_addr))
2475 return 0; /* no specific Enrollee selected */
2476
2477 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2478 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2479 "Enrollee match");
2480 return 1;
2481 }
2482 #endif /* CONFIG_P2P */
2483 return 0;
2484 }
2485
2486
2487 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2488 struct wps_parse_attr *attr)
2489 {
2490 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2491
2492 if (wps->state != RECV_M1) {
2493 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2494 "receiving M1", wps->state);
2495 return WPS_FAILURE;
2496 }
2497
2498 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2499 wps_process_mac_addr(wps, attr->mac_addr) ||
2500 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2501 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2502 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2503 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2504 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2505 wps_process_config_methods(wps, attr->config_methods) ||
2506 wps_process_wps_state(wps, attr->wps_state) ||
2507 wps_process_device_attrs(&wps->peer_dev, attr) ||
2508 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2509 wps_process_assoc_state(wps, attr->assoc_state) ||
2510 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2511 wps_process_config_error(wps, attr->config_error) ||
2512 wps_process_os_version(&wps->peer_dev, attr->os_version))
2513 return WPS_FAILURE;
2514
2515 if (wps->dev_pw_id < 0x10 &&
2516 wps->dev_pw_id != DEV_PW_DEFAULT &&
2517 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2518 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2519 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2520 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2521 !wps->wps->registrar->pbc)) {
2522 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2523 wps->dev_pw_id);
2524 wps->state = SEND_M2D;
2525 return WPS_CONTINUE;
2526 }
2527
2528 #ifdef CONFIG_WPS_NFC
2529 if (wps->dev_pw_id >= 0x10) {
2530 struct wps_nfc_pw_token *token;
2531 const u8 *addr[1];
2532 u8 hash[WPS_HASH_LEN];
2533
2534 token = wps_get_nfc_pw_token(
2535 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2536 if (token) {
2537 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2538 "Password Token");
2539 dl_list_del(&token->list);
2540 wps->nfc_pw_token = token;
2541
2542 addr[0] = attr->public_key;
2543 sha256_vector(1, addr, &attr->public_key_len, hash);
2544 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash,
2545 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2546 wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2547 "mismatch");
2548 return WPS_FAILURE;
2549 }
2550 }
2551 }
2552 #endif /* CONFIG_WPS_NFC */
2553
2554 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2555 if ((wps->wps->registrar->force_pbc_overlap ||
2556 wps_registrar_pbc_overlap(wps->wps->registrar,
2557 wps->mac_addr_e, wps->uuid_e) ||
2558 !wps_registrar_p2p_dev_addr_match(wps)) &&
2559 !wps_registrar_skip_overlap(wps)) {
2560 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2561 "negotiation");
2562 wps->state = SEND_M2D;
2563 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2564 wps_pbc_overlap_event(wps->wps);
2565 wps_fail_event(wps->wps, WPS_M1,
2566 WPS_CFG_MULTIPLE_PBC_DETECTED,
2567 WPS_EI_NO_ERROR);
2568 wps->wps->registrar->force_pbc_overlap = 1;
2569 return WPS_CONTINUE;
2570 }
2571 wps_registrar_add_pbc_session(wps->wps->registrar,
2572 wps->mac_addr_e, wps->uuid_e);
2573 wps->pbc = 1;
2574 }
2575
2576 #ifdef WPS_WORKAROUNDS
2577 /*
2578 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2579 * passphrase format. To avoid interop issues, force PSK format to be
2580 * used.
2581 */
2582 if (!wps->use_psk_key &&
2583 wps->peer_dev.manufacturer &&
2584 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2585 wps->peer_dev.model_name &&
2586 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2587 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2588 "PSK format");
2589 wps->use_psk_key = 1;
2590 }
2591 #endif /* WPS_WORKAROUNDS */
2592
2593 wps->state = SEND_M2;
2594 return WPS_CONTINUE;
2595 }
2596
2597
2598 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2599 const struct wpabuf *msg,
2600 struct wps_parse_attr *attr)
2601 {
2602 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2603
2604 if (wps->state != RECV_M3) {
2605 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2606 "receiving M3", wps->state);
2607 wps->state = SEND_WSC_NACK;
2608 return WPS_CONTINUE;
2609 }
2610
2611 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2612 !wps_registrar_skip_overlap(wps)) {
2613 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2614 "session overlap");
2615 wps->state = SEND_WSC_NACK;
2616 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2617 return WPS_CONTINUE;
2618 }
2619
2620 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2621 wps_process_authenticator(wps, attr->authenticator, msg) ||
2622 wps_process_e_hash1(wps, attr->e_hash1) ||
2623 wps_process_e_hash2(wps, attr->e_hash2)) {
2624 wps->state = SEND_WSC_NACK;
2625 return WPS_CONTINUE;
2626 }
2627
2628 wps->state = SEND_M4;
2629 return WPS_CONTINUE;
2630 }
2631
2632
2633 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2634 const struct wpabuf *msg,
2635 struct wps_parse_attr *attr)
2636 {
2637 struct wpabuf *decrypted;
2638 struct wps_parse_attr eattr;
2639
2640 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2641
2642 if (wps->state != RECV_M5) {
2643 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2644 "receiving M5", wps->state);
2645 wps->state = SEND_WSC_NACK;
2646 return WPS_CONTINUE;
2647 }
2648
2649 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2650 !wps_registrar_skip_overlap(wps)) {
2651 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2652 "session overlap");
2653 wps->state = SEND_WSC_NACK;
2654 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2655 return WPS_CONTINUE;
2656 }
2657
2658 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2659 wps_process_authenticator(wps, attr->authenticator, msg)) {
2660 wps->state = SEND_WSC_NACK;
2661 return WPS_CONTINUE;
2662 }
2663
2664 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2665 attr->encr_settings_len);
2666 if (decrypted == NULL) {
2667 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2668 "Settings attribute");
2669 wps->state = SEND_WSC_NACK;
2670 return WPS_CONTINUE;
2671 }
2672
2673 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2674 wpabuf_free(decrypted);
2675 wps->state = SEND_WSC_NACK;
2676 return WPS_CONTINUE;
2677 }
2678
2679 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2680 "attribute");
2681 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2682 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2683 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2684 wpabuf_free(decrypted);
2685 wps->state = SEND_WSC_NACK;
2686 return WPS_CONTINUE;
2687 }
2688 wpabuf_free(decrypted);
2689
2690 wps->state = SEND_M6;
2691 return WPS_CONTINUE;
2692 }
2693
2694
2695 static void wps_sta_cred_cb(struct wps_data *wps)
2696 {
2697 /*
2698 * Update credential to only include a single authentication and
2699 * encryption type in case the AP configuration includes more than one
2700 * option.
2701 */
2702 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2703 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2704 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2705 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2706 if (wps->cred.encr_type & WPS_ENCR_AES)
2707 wps->cred.encr_type = WPS_ENCR_AES;
2708 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2709 wps->cred.encr_type = WPS_ENCR_TKIP;
2710 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2711 "AP configuration");
2712 if (wps->wps->cred_cb)
2713 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2714 }
2715
2716
2717 static void wps_cred_update(struct wps_credential *dst,
2718 struct wps_credential *src)
2719 {
2720 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2721 dst->ssid_len = src->ssid_len;
2722 dst->auth_type = src->auth_type;
2723 dst->encr_type = src->encr_type;
2724 dst->key_idx = src->key_idx;
2725 os_memcpy(dst->key, src->key, sizeof(dst->key));
2726 dst->key_len = src->key_len;
2727 }
2728
2729
2730 static int wps_process_ap_settings_r(struct wps_data *wps,
2731 struct wps_parse_attr *attr)
2732 {
2733 struct wpabuf *msg;
2734
2735 if (wps->wps->ap || wps->er)
2736 return 0;
2737
2738 /* AP Settings Attributes in M7 when Enrollee is an AP */
2739 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2740 return -1;
2741
2742 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2743
2744 if (wps->new_ap_settings) {
2745 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2746 "new settings");
2747 wps_cred_update(&wps->cred, wps->new_ap_settings);
2748 return 0;
2749 } else {
2750 /*
2751 * Use the AP PIN only to receive the current AP settings, not
2752 * to reconfigure the AP.
2753 */
2754
2755 /*
2756 * Clear selected registrar here since we do not get to
2757 * WSC_Done in this protocol run.
2758 */
2759 wps_registrar_pin_completed(wps->wps->registrar);
2760
2761 msg = wps_build_ap_cred(wps);
2762 if (msg == NULL)
2763 return -1;
2764 wps->cred.cred_attr = wpabuf_head(msg);
2765 wps->cred.cred_attr_len = wpabuf_len(msg);
2766
2767 if (wps->ap_settings_cb) {
2768 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2769 &wps->cred);
2770 wpabuf_free(msg);
2771 return 1;
2772 }
2773 wps_sta_cred_cb(wps);
2774
2775 wps->cred.cred_attr = NULL;
2776 wps->cred.cred_attr_len = 0;
2777 wpabuf_free(msg);
2778
2779 return 1;
2780 }
2781 }
2782
2783
2784 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2785 const struct wpabuf *msg,
2786 struct wps_parse_attr *attr)
2787 {
2788 struct wpabuf *decrypted;
2789 struct wps_parse_attr eattr;
2790
2791 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2792
2793 if (wps->state != RECV_M7) {
2794 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2795 "receiving M7", wps->state);
2796 wps->state = SEND_WSC_NACK;
2797 return WPS_CONTINUE;
2798 }
2799
2800 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2801 !wps_registrar_skip_overlap(wps)) {
2802 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2803 "session overlap");
2804 wps->state = SEND_WSC_NACK;
2805 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2806 return WPS_CONTINUE;
2807 }
2808
2809 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2810 wps_process_authenticator(wps, attr->authenticator, msg)) {
2811 wps->state = SEND_WSC_NACK;
2812 return WPS_CONTINUE;
2813 }
2814
2815 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2816 attr->encr_settings_len);
2817 if (decrypted == NULL) {
2818 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2819 "Settings attribute");
2820 wps->state = SEND_WSC_NACK;
2821 return WPS_CONTINUE;
2822 }
2823
2824 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2825 attr->version2 != NULL) < 0) {
2826 wpabuf_free(decrypted);
2827 wps->state = SEND_WSC_NACK;
2828 return WPS_CONTINUE;
2829 }
2830
2831 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2832 "attribute");
2833 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2834 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2835 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2836 wps_process_ap_settings_r(wps, &eattr)) {
2837 wpabuf_free(decrypted);
2838 wps->state = SEND_WSC_NACK;
2839 return WPS_CONTINUE;
2840 }
2841
2842 wpabuf_free(decrypted);
2843
2844 wps->state = SEND_M8;
2845 return WPS_CONTINUE;
2846 }
2847
2848
2849 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2850 const struct wpabuf *msg)
2851 {
2852 struct wps_parse_attr attr;
2853 enum wps_process_res ret = WPS_CONTINUE;
2854
2855 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2856
2857 if (wps_parse_msg(msg, &attr) < 0)
2858 return WPS_FAILURE;
2859
2860 if (attr.msg_type == NULL) {
2861 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2862 wps->state = SEND_WSC_NACK;
2863 return WPS_CONTINUE;
2864 }
2865
2866 if (*attr.msg_type != WPS_M1 &&
2867 (attr.registrar_nonce == NULL ||
2868 os_memcmp(wps->nonce_r, attr.registrar_nonce,
2869 WPS_NONCE_LEN) != 0)) {
2870 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2871 return WPS_FAILURE;
2872 }
2873
2874 switch (*attr.msg_type) {
2875 case WPS_M1:
2876 if (wps_validate_m1(msg) < 0)
2877 return WPS_FAILURE;
2878 #ifdef CONFIG_WPS_UPNP
2879 if (wps->wps->wps_upnp && attr.mac_addr) {
2880 /* Remove old pending messages when starting new run */
2881 wps_free_pending_msgs(wps->wps->upnp_msgs);
2882 wps->wps->upnp_msgs = NULL;
2883
2884 upnp_wps_device_send_wlan_event(
2885 wps->wps->wps_upnp, attr.mac_addr,
2886 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2887 }
2888 #endif /* CONFIG_WPS_UPNP */
2889 ret = wps_process_m1(wps, &attr);
2890 break;
2891 case WPS_M3:
2892 if (wps_validate_m3(msg) < 0)
2893 return WPS_FAILURE;
2894 ret = wps_process_m3(wps, msg, &attr);
2895 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2896 wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2897 wps->error_indication);
2898 break;
2899 case WPS_M5:
2900 if (wps_validate_m5(msg) < 0)
2901 return WPS_FAILURE;
2902 ret = wps_process_m5(wps, msg, &attr);
2903 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2904 wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2905 wps->error_indication);
2906 break;
2907 case WPS_M7:
2908 if (wps_validate_m7(msg) < 0)
2909 return WPS_FAILURE;
2910 ret = wps_process_m7(wps, msg, &attr);
2911 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2912 wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2913 wps->error_indication);
2914 break;
2915 default:
2916 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2917 *attr.msg_type);
2918 return WPS_FAILURE;
2919 }
2920
2921 if (ret == WPS_CONTINUE) {
2922 /* Save a copy of the last message for Authenticator derivation
2923 */
2924 wpabuf_free(wps->last_msg);
2925 wps->last_msg = wpabuf_dup(msg);
2926 }
2927
2928 return ret;
2929 }
2930
2931
2932 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2933 const struct wpabuf *msg)
2934 {
2935 struct wps_parse_attr attr;
2936
2937 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2938
2939 if (wps_parse_msg(msg, &attr) < 0)
2940 return WPS_FAILURE;
2941
2942 if (attr.msg_type == NULL) {
2943 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2944 return WPS_FAILURE;
2945 }
2946
2947 if (*attr.msg_type != WPS_WSC_ACK) {
2948 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
2949 *attr.msg_type);
2950 return WPS_FAILURE;
2951 }
2952
2953 #ifdef CONFIG_WPS_UPNP
2954 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
2955 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2956 if (wps->wps->upnp_msgs)
2957 return WPS_CONTINUE;
2958 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2959 "external Registrar");
2960 return WPS_PENDING;
2961 }
2962 #endif /* CONFIG_WPS_UPNP */
2963
2964 if (attr.registrar_nonce == NULL ||
2965 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
2966 {
2967 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2968 return WPS_FAILURE;
2969 }
2970
2971 if (attr.enrollee_nonce == NULL ||
2972 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
2973 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
2974 return WPS_FAILURE;
2975 }
2976
2977 if (wps->state == RECV_M2D_ACK) {
2978 #ifdef CONFIG_WPS_UPNP
2979 if (wps->wps->wps_upnp &&
2980 upnp_wps_subscribers(wps->wps->wps_upnp)) {
2981 if (wps->wps->upnp_msgs)
2982 return WPS_CONTINUE;
2983 if (wps->ext_reg == 0)
2984 wps->ext_reg = 1;
2985 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
2986 "external Registrar");
2987 return WPS_PENDING;
2988 }
2989 #endif /* CONFIG_WPS_UPNP */
2990
2991 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
2992 "terminate negotiation");
2993 }
2994
2995 return WPS_FAILURE;
2996 }
2997
2998
2999 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3000 const struct wpabuf *msg)
3001 {
3002 struct wps_parse_attr attr;
3003 int old_state;
3004 u16 config_error;
3005
3006 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3007
3008 old_state = wps->state;
3009 wps->state = SEND_WSC_NACK;
3010
3011 if (wps_parse_msg(msg, &attr) < 0)
3012 return WPS_FAILURE;
3013
3014 if (attr.msg_type == NULL) {
3015 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3016 return WPS_FAILURE;
3017 }
3018
3019 if (*attr.msg_type != WPS_WSC_NACK) {
3020 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3021 *attr.msg_type);
3022 return WPS_FAILURE;
3023 }
3024
3025 #ifdef CONFIG_WPS_UPNP
3026 if (wps->wps->wps_upnp && wps->ext_reg) {
3027 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3028 "Registrar terminated by the Enrollee");
3029 return WPS_FAILURE;
3030 }
3031 #endif /* CONFIG_WPS_UPNP */
3032
3033 if (attr.registrar_nonce == NULL ||
3034 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3035 {
3036 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3037 return WPS_FAILURE;
3038 }
3039
3040 if (attr.enrollee_nonce == NULL ||
3041 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3042 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3043 return WPS_FAILURE;
3044 }
3045
3046 if (attr.config_error == NULL) {
3047 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3048 "in WSC_NACK");
3049 return WPS_FAILURE;
3050 }
3051
3052 config_error = WPA_GET_BE16(attr.config_error);
3053 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3054 "Configuration Error %d", config_error);
3055
3056 switch (old_state) {
3057 case RECV_M3:
3058 wps_fail_event(wps->wps, WPS_M2, config_error,
3059 wps->error_indication);
3060 break;
3061 case RECV_M5:
3062 wps_fail_event(wps->wps, WPS_M4, config_error,
3063 wps->error_indication);
3064 break;
3065 case RECV_M7:
3066 wps_fail_event(wps->wps, WPS_M6, config_error,
3067 wps->error_indication);
3068 break;
3069 case RECV_DONE:
3070 wps_fail_event(wps->wps, WPS_M8, config_error,
3071 wps->error_indication);
3072 break;
3073 default:
3074 break;
3075 }
3076
3077 return WPS_FAILURE;
3078 }
3079
3080
3081 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3082 const struct wpabuf *msg)
3083 {
3084 struct wps_parse_attr attr;
3085
3086 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3087
3088 if (wps->state != RECV_DONE &&
3089 (!wps->wps->wps_upnp || !wps->ext_reg)) {
3090 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3091 "receiving WSC_Done", wps->state);
3092 return WPS_FAILURE;
3093 }
3094
3095 if (wps_parse_msg(msg, &attr) < 0)
3096 return WPS_FAILURE;
3097
3098 if (attr.msg_type == NULL) {
3099 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3100 return WPS_FAILURE;
3101 }
3102
3103 if (*attr.msg_type != WPS_WSC_DONE) {
3104 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3105 *attr.msg_type);
3106 return WPS_FAILURE;
3107 }
3108
3109 #ifdef CONFIG_WPS_UPNP
3110 if (wps->wps->wps_upnp && wps->ext_reg) {
3111 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3112 "Registrar completed successfully");
3113 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3114 wps->uuid_e);
3115 return WPS_DONE;
3116 }
3117 #endif /* CONFIG_WPS_UPNP */
3118
3119 if (attr.registrar_nonce == NULL ||
3120 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3121 {
3122 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3123 return WPS_FAILURE;
3124 }
3125
3126 if (attr.enrollee_nonce == NULL ||
3127 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3128 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3129 return WPS_FAILURE;
3130 }
3131
3132 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3133 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3134 wps->uuid_e);
3135
3136 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3137 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3138 struct wps_credential cred;
3139
3140 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3141 "on first Enrollee connection");
3142
3143 os_memset(&cred, 0, sizeof(cred));
3144 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3145 cred.ssid_len = wps->wps->ssid_len;
3146 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3147 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3148 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3149 cred.key_len = wps->new_psk_len;
3150
3151 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3152 wpa_hexdump_ascii_key(MSG_DEBUG,
3153 "WPS: Generated random passphrase",
3154 wps->new_psk, wps->new_psk_len);
3155 if (wps->wps->cred_cb)
3156 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3157
3158 os_free(wps->new_psk);
3159 wps->new_psk = NULL;
3160 }
3161
3162 if (!wps->wps->ap && !wps->er)
3163 wps_sta_cred_cb(wps);
3164
3165 if (wps->new_psk) {
3166 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3167 wps->new_psk, wps->new_psk_len)) {
3168 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3169 "new PSK");
3170 }
3171 os_free(wps->new_psk);
3172 wps->new_psk = NULL;
3173 }
3174
3175 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3176 wps->dev_password, wps->dev_password_len);
3177
3178 if (wps->pbc) {
3179 wps_registrar_remove_pbc_session(wps->wps->registrar,
3180 wps->uuid_e,
3181 wps->p2p_dev_addr);
3182 wps_registrar_pbc_completed(wps->wps->registrar);
3183 os_get_time(&wps->wps->registrar->pbc_ignore_start);
3184 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3185 WPS_UUID_LEN);
3186 } else {
3187 wps_registrar_pin_completed(wps->wps->registrar);
3188 }
3189 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3190 * merge them into APs own list.. */
3191
3192 wps_success_event(wps->wps);
3193
3194 return WPS_DONE;
3195 }
3196
3197
3198 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3199 enum wsc_op_code op_code,
3200 const struct wpabuf *msg)
3201 {
3202 enum wps_process_res ret;
3203
3204 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3205 "op_code=%d)",
3206 (unsigned long) wpabuf_len(msg), op_code);
3207
3208 #ifdef CONFIG_WPS_UPNP
3209 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3210 struct wps_parse_attr attr;
3211 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3212 *attr.msg_type == WPS_M3)
3213 wps->ext_reg = 2; /* past M2/M2D phase */
3214 }
3215 if (wps->ext_reg > 1)
3216 wps_registrar_free_pending_m2(wps->wps);
3217 if (wps->wps->wps_upnp && wps->ext_reg &&
3218 wps->wps->upnp_msgs == NULL &&
3219 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3220 {
3221 struct wps_parse_attr attr;
3222 int type;
3223 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3224 type = -1;
3225 else
3226 type = *attr.msg_type;
3227 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3228 " to external Registrar for processing", type);
3229 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3230 wps->mac_addr_e,
3231 UPNP_WPS_WLANEVENT_TYPE_EAP,
3232 msg);
3233 if (op_code == WSC_MSG)
3234 return WPS_PENDING;
3235 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3236 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3237 "external Registrar");
3238 return WPS_CONTINUE;
3239 }
3240 #endif /* CONFIG_WPS_UPNP */
3241
3242 switch (op_code) {
3243 case WSC_MSG:
3244 return wps_process_wsc_msg(wps, msg);
3245 case WSC_ACK:
3246 if (wps_validate_wsc_ack(msg) < 0)
3247 return WPS_FAILURE;
3248 return wps_process_wsc_ack(wps, msg);
3249 case WSC_NACK:
3250 if (wps_validate_wsc_nack(msg) < 0)
3251 return WPS_FAILURE;
3252 return wps_process_wsc_nack(wps, msg);
3253 case WSC_Done:
3254 if (wps_validate_wsc_done(msg) < 0)
3255 return WPS_FAILURE;
3256 ret = wps_process_wsc_done(wps, msg);
3257 if (ret == WPS_FAILURE) {
3258 wps->state = SEND_WSC_NACK;
3259 wps_fail_event(wps->wps, WPS_WSC_DONE,
3260 wps->config_error,
3261 wps->error_indication);
3262 }
3263 return ret;
3264 default:
3265 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3266 return WPS_FAILURE;
3267 }
3268 }
3269
3270
3271 int wps_registrar_update_ie(struct wps_registrar *reg)
3272 {
3273 return wps_set_ie(reg);
3274 }
3275
3276
3277 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3278 void *timeout_ctx)
3279 {
3280 struct wps_registrar *reg = eloop_ctx;
3281
3282 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3283 "unselect internal Registrar");
3284 reg->selected_registrar = 0;
3285 reg->pbc = 0;
3286 wps_registrar_selected_registrar_changed(reg);
3287 }
3288
3289
3290 #ifdef CONFIG_WPS_UPNP
3291 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3292 struct subscription *s)
3293 {
3294 int i, j;
3295 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3296 "config_methods=0x%x)",
3297 s->dev_password_id, s->config_methods);
3298 reg->sel_reg_union = 1;
3299 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3300 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3301 if (reg->sel_reg_config_methods_override == -1)
3302 reg->sel_reg_config_methods_override = 0;
3303 reg->sel_reg_config_methods_override |= s->config_methods;
3304 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3305 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3306 break;
3307 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3308 j++) {
3309 if (is_zero_ether_addr(s->authorized_macs[j]))
3310 break;
3311 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3312 MACSTR, MAC2STR(s->authorized_macs[j]));
3313 os_memcpy(reg->authorized_macs_union[i],
3314 s->authorized_macs[j], ETH_ALEN);
3315 i++;
3316 }
3317 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3318 (u8 *) reg->authorized_macs_union,
3319 sizeof(reg->authorized_macs_union));
3320 }
3321 #endif /* CONFIG_WPS_UPNP */
3322
3323
3324 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3325 {
3326 #ifdef CONFIG_WPS_UPNP
3327 struct subscription *s;
3328
3329 if (reg->wps->wps_upnp == NULL)
3330 return;
3331
3332 dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3333 struct subscription, list) {
3334 struct subscr_addr *sa;
3335 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3336 if (sa) {
3337 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3338 inet_ntoa(sa->saddr.sin_addr),
3339 ntohs(sa->saddr.sin_port));
3340 }
3341 if (s->selected_registrar)
3342 wps_registrar_sel_reg_add(reg, s);
3343 else
3344 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3345 "selected");
3346 }
3347 #endif /* CONFIG_WPS_UPNP */
3348 }
3349
3350
3351 /**
3352 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3353 * @reg: Registrar data from wps_registrar_init()
3354 *
3355 * This function is called when selected registrar state changes, e.g., when an
3356 * AP receives a SetSelectedRegistrar UPnP message.
3357 */
3358 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg)
3359 {
3360 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3361
3362 reg->sel_reg_union = reg->selected_registrar;
3363 reg->sel_reg_dev_password_id_override = -1;
3364 reg->sel_reg_config_methods_override = -1;
3365 os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3366 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3367 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3368 (u8 *) reg->authorized_macs_union,
3369 sizeof(reg->authorized_macs_union));
3370 if (reg->selected_registrar) {
3371 u16 methods;
3372
3373 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3374 #ifdef CONFIG_WPS2
3375 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3376 WPS_CONFIG_PHY_PUSHBUTTON);
3377 #endif /* CONFIG_WPS2 */
3378 if (reg->pbc) {
3379 reg->sel_reg_dev_password_id_override =
3380 DEV_PW_PUSHBUTTON;
3381 wps_set_pushbutton(&methods, reg->wps->config_methods);
3382 }
3383 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3384 "(pbc=%d)", reg->pbc);
3385 reg->sel_reg_config_methods_override = methods;
3386 } else
3387 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3388
3389 wps_registrar_sel_reg_union(reg);
3390
3391 wps_set_ie(reg);
3392 wps_cb_set_sel_reg(reg);
3393 }
3394
3395
3396 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3397 char *buf, size_t buflen)
3398 {
3399 struct wps_registrar_device *d;
3400 int len = 0, ret;
3401 char uuid[40];
3402 char devtype[WPS_DEV_TYPE_BUFSIZE];
3403
3404 d = wps_device_get(reg, addr);
3405 if (d == NULL)
3406 return 0;
3407 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3408 return 0;
3409
3410 ret = os_snprintf(buf + len, buflen - len,
3411 "wpsUuid=%s\n"
3412 "wpsPrimaryDeviceType=%s\n"
3413 "wpsDeviceName=%s\n"
3414 "wpsManufacturer=%s\n"
3415 "wpsModelName=%s\n"
3416 "wpsModelNumber=%s\n"
3417 "wpsSerialNumber=%s\n",
3418 uuid,
3419 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3420 sizeof(devtype)),
3421 d->dev.device_name ? d->dev.device_name : "",
3422 d->dev.manufacturer ? d->dev.manufacturer : "",
3423 d->dev.model_name ? d->dev.model_name : "",
3424 d->dev.model_number ? d->dev.model_number : "",
3425 d->dev.serial_number ? d->dev.serial_number : "");
3426 if (ret < 0 || (size_t) ret >= buflen - len)
3427 return len;
3428 len += ret;
3429
3430 return len;
3431 }
3432
3433
3434 int wps_registrar_config_ap(struct wps_registrar *reg,
3435 struct wps_credential *cred)
3436 {
3437 #ifdef CONFIG_WPS2
3438 printf("encr_type=0x%x\n", cred->encr_type);
3439 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3440 WPS_ENCR_AES))) {
3441 if (cred->encr_type & WPS_ENCR_WEP) {
3442 wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3443 "due to WEP configuration");
3444 return -1;
3445 }
3446
3447 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3448 "invalid encr_type 0x%x", cred->encr_type);
3449 return -1;
3450 }
3451
3452 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3453 WPS_ENCR_TKIP) {
3454 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3455 "TKIP+AES");
3456 cred->encr_type |= WPS_ENCR_AES;
3457 }
3458
3459 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3460 WPS_AUTH_WPAPSK) {
3461 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3462 "WPAPSK+WPA2PSK");
3463 cred->auth_type |= WPS_AUTH_WPA2PSK;
3464 }
3465 #endif /* CONFIG_WPS2 */
3466
3467 if (reg->wps->cred_cb)
3468 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3469
3470 return -1;
3471 }
3472
3473
3474 #ifdef CONFIG_WPS_NFC
3475
3476 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3477 const u8 *pubkey_hash, u16 pw_id,
3478 const u8 *dev_pw, size_t dev_pw_len)
3479 {
3480 struct wps_nfc_pw_token *token;
3481
3482 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3483 return -1;
3484
3485 wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, pw_id);
3486
3487 token = os_zalloc(sizeof(*token));
3488 if (token == NULL)
3489 return -1;
3490
3491 os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
3492 token->pw_id = pw_id;
3493 os_memcpy(token->dev_pw, dev_pw, dev_pw_len);
3494 token->dev_pw_len = dev_pw_len;
3495
3496 dl_list_add(&reg->nfc_pw_tokens, &token->list);
3497
3498 reg->selected_registrar = 1;
3499 reg->pbc = 0;
3500 wps_registrar_add_authorized_mac(reg,
3501 (u8 *) "\xff\xff\xff\xff\xff\xff");
3502 wps_registrar_selected_registrar_changed(reg);
3503 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3504 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3505 wps_registrar_set_selected_timeout,
3506 reg, NULL);
3507
3508 return 0;
3509 }
3510
3511
3512 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3513 const u8 *oob_dev_pw,
3514 size_t oob_dev_pw_len)
3515 {
3516 const u8 *pos, *hash, *dev_pw;
3517 u16 id;
3518 size_t dev_pw_len;
3519
3520 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 +
3521 WPS_OOB_DEVICE_PASSWORD_MIN_LEN ||
3522 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3523 WPS_OOB_DEVICE_PASSWORD_LEN)
3524 return -1;
3525
3526 hash = oob_dev_pw;
3527 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3528 id = WPA_GET_BE16(pos);
3529 dev_pw = pos + 2;
3530 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3531
3532 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3533 id);
3534
3535 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3536 hash, WPS_OOB_PUBKEY_HASH_LEN);
3537 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3538
3539 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3540 dev_pw_len);
3541 }
3542
3543
3544 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3545 struct wps_nfc_pw_token *token)
3546 {
3547 wps_registrar_remove_authorized_mac(reg,
3548 (u8 *) "\xff\xff\xff\xff\xff\xff");
3549 wps_registrar_selected_registrar_changed(reg);
3550 }
3551
3552 #endif /* CONFIG_WPS_NFC */
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