1 /*
2 * Wi-Fi Protected Setup - Registrar
3 * Copyright (c) 2008-2016, 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 unsigned int peer_pk_hash_known:1;
35 u16 pw_id;
36 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1];
37 size_t dev_pw_len;
38 int pk_hash_provided_oob; /* whether own PK hash was provided OOB */
39 };
40
41
wps_remove_nfc_pw_token(struct wps_nfc_pw_token * token)42 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
43 {
44 dl_list_del(&token->list);
45 bin_clear_free(token, sizeof(*token));
46 }
47
48
wps_free_nfc_pw_tokens(struct dl_list * tokens,u16 pw_id)49 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
50 {
51 struct wps_nfc_pw_token *token, *prev;
52 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
53 list) {
54 if (pw_id == 0 || pw_id == token->pw_id)
55 wps_remove_nfc_pw_token(token);
56 }
57 }
58
59
wps_get_nfc_pw_token(struct dl_list * tokens,u16 pw_id)60 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens,
61 u16 pw_id)
62 {
63 struct wps_nfc_pw_token *token;
64 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
65 if (pw_id == token->pw_id)
66 return token;
67 }
68 return NULL;
69 }
70
71 #else /* CONFIG_WPS_NFC */
72
73 #define wps_free_nfc_pw_tokens(t, p) do { } while (0)
74
75 #endif /* CONFIG_WPS_NFC */
76
77
78 struct wps_uuid_pin {
79 struct dl_list list;
80 u8 uuid[WPS_UUID_LEN];
81 int wildcard_uuid;
82 u8 *pin;
83 size_t pin_len;
84 #define PIN_LOCKED BIT(0)
85 #define PIN_EXPIRES BIT(1)
86 int flags;
87 struct os_reltime expiration;
88 u8 enrollee_addr[ETH_ALEN];
89 };
90
91
wps_free_pin(struct wps_uuid_pin * pin)92 static void wps_free_pin(struct wps_uuid_pin *pin)
93 {
94 bin_clear_free(pin->pin, pin->pin_len);
95 os_free(pin);
96 }
97
98
wps_remove_pin(struct wps_uuid_pin * pin)99 static void wps_remove_pin(struct wps_uuid_pin *pin)
100 {
101 dl_list_del(&pin->list);
102 wps_free_pin(pin);
103 }
104
105
wps_free_pins(struct dl_list * pins)106 static void wps_free_pins(struct dl_list *pins)
107 {
108 struct wps_uuid_pin *pin, *prev;
109 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
110 wps_remove_pin(pin);
111 }
112
113
114 struct wps_pbc_session {
115 struct wps_pbc_session *next;
116 u8 addr[ETH_ALEN];
117 u8 uuid_e[WPS_UUID_LEN];
118 struct os_reltime timestamp;
119 };
120
121
wps_free_pbc_sessions(struct wps_pbc_session * pbc)122 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
123 {
124 struct wps_pbc_session *prev;
125
126 while (pbc) {
127 prev = pbc;
128 pbc = pbc->next;
129 os_free(prev);
130 }
131 }
132
133
134 struct wps_registrar_device {
135 struct wps_registrar_device *next;
136 struct wps_device_data dev;
137 u8 uuid[WPS_UUID_LEN];
138 };
139
140
141 struct wps_registrar {
142 struct wps_context *wps;
143
144 int pbc;
145 int selected_registrar;
146
147 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr,
148 const u8 *psk, size_t psk_len);
149 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
150 struct wpabuf *probe_resp_ie);
151 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
152 const struct wps_device_data *dev);
153 void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
154 const u8 *uuid_e, const u8 *dev_pw,
155 size_t dev_pw_len);
156 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
157 u16 sel_reg_config_methods);
158 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
159 const u8 *pri_dev_type, u16 config_methods,
160 u16 dev_password_id, u8 request_type,
161 const char *dev_name);
162 void *cb_ctx;
163
164 struct dl_list pins;
165 struct dl_list nfc_pw_tokens;
166 struct wps_pbc_session *pbc_sessions;
167
168 int skip_cred_build;
169 struct wpabuf *extra_cred;
170 int disable_auto_conf;
171 int sel_reg_union;
172 int sel_reg_dev_password_id_override;
173 int sel_reg_config_methods_override;
174 int static_wep_only;
175 int dualband;
176 int force_per_enrollee_psk;
177
178 struct wps_registrar_device *devices;
179
180 int force_pbc_overlap;
181
182 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
183 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
184
185 u8 p2p_dev_addr[ETH_ALEN];
186
187 u8 pbc_ignore_uuid[WPS_UUID_LEN];
188 #ifdef WPS_WORKAROUNDS
189 struct os_reltime pbc_ignore_start;
190 #endif /* WPS_WORKAROUNDS */
191
192 /**
193 * multi_ap_backhaul_ssid - SSID to supply to a Multi-AP backhaul
194 * enrollee
195 *
196 * This SSID is used by the Registrar to fill in information for
197 * Credentials when the enrollee advertises it is a Multi-AP backhaul
198 * STA.
199 */
200 u8 multi_ap_backhaul_ssid[SSID_MAX_LEN];
201
202 /**
203 * multi_ap_backhaul_ssid_len - Length of multi_ap_backhaul_ssid in
204 * octets
205 */
206 size_t multi_ap_backhaul_ssid_len;
207
208 /**
209 * multi_ap_backhaul_network_key - The Network Key (PSK) for the
210 * Multi-AP backhaul enrollee.
211 *
212 * This key can be either the ASCII passphrase (8..63 characters) or the
213 * 32-octet PSK (64 hex characters).
214 */
215 u8 *multi_ap_backhaul_network_key;
216
217 /**
218 * multi_ap_backhaul_network_key_len - Length of
219 * multi_ap_backhaul_network_key in octets
220 */
221 size_t multi_ap_backhaul_network_key_len;
222 };
223
224
225 static int wps_set_ie(struct wps_registrar *reg);
226 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
227 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
228 void *timeout_ctx);
229 static void wps_registrar_remove_pin(struct wps_registrar *reg,
230 struct wps_uuid_pin *pin);
231
232
wps_registrar_add_authorized_mac(struct wps_registrar * reg,const u8 * addr)233 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
234 const u8 *addr)
235 {
236 int i;
237 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
238 MAC2STR(addr));
239 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
240 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
241 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
242 "already in the list");
243 return; /* already in list */
244 }
245 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
246 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
247 ETH_ALEN);
248 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
249 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
250 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
251 }
252
253
wps_registrar_remove_authorized_mac(struct wps_registrar * reg,const u8 * addr)254 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
255 const u8 *addr)
256 {
257 int i;
258 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
259 MAC2STR(addr));
260 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
261 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
262 break;
263 }
264 if (i == WPS_MAX_AUTHORIZED_MACS) {
265 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
266 "list");
267 return; /* not in the list */
268 }
269 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
270 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
271 ETH_ALEN);
272 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
273 ETH_ALEN);
274 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
275 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
276 }
277
278
wps_free_devices(struct wps_registrar_device * dev)279 static void wps_free_devices(struct wps_registrar_device *dev)
280 {
281 struct wps_registrar_device *prev;
282
283 while (dev) {
284 prev = dev;
285 dev = dev->next;
286 wps_device_data_free(&prev->dev);
287 os_free(prev);
288 }
289 }
290
291
wps_device_get(struct wps_registrar * reg,const u8 * addr)292 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
293 const u8 *addr)
294 {
295 struct wps_registrar_device *dev;
296
297 for (dev = reg->devices; dev; dev = dev->next) {
298 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
299 return dev;
300 }
301 return NULL;
302 }
303
304
wps_device_clone_data(struct wps_device_data * dst,struct wps_device_data * src)305 static void wps_device_clone_data(struct wps_device_data *dst,
306 struct wps_device_data *src)
307 {
308 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
309 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
310
311 #define WPS_STRDUP(n) \
312 os_free(dst->n); \
313 dst->n = src->n ? os_strdup(src->n) : NULL
314
315 WPS_STRDUP(device_name);
316 WPS_STRDUP(manufacturer);
317 WPS_STRDUP(model_name);
318 WPS_STRDUP(model_number);
319 WPS_STRDUP(serial_number);
320 #undef WPS_STRDUP
321 }
322
323
wps_device_store(struct wps_registrar * reg,struct wps_device_data * dev,const u8 * uuid)324 int wps_device_store(struct wps_registrar *reg,
325 struct wps_device_data *dev, const u8 *uuid)
326 {
327 struct wps_registrar_device *d;
328
329 d = wps_device_get(reg, dev->mac_addr);
330 if (d == NULL) {
331 d = os_zalloc(sizeof(*d));
332 if (d == NULL)
333 return -1;
334 d->next = reg->devices;
335 reg->devices = d;
336 }
337
338 wps_device_clone_data(&d->dev, dev);
339 os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
340
341 return 0;
342 }
343
344
wps_registrar_add_pbc_session(struct wps_registrar * reg,const u8 * addr,const u8 * uuid_e)345 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
346 const u8 *addr, const u8 *uuid_e)
347 {
348 struct wps_pbc_session *pbc, *prev = NULL;
349 struct os_reltime now;
350
351 os_get_reltime(&now);
352
353 pbc = reg->pbc_sessions;
354 while (pbc) {
355 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
356 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
357 if (prev)
358 prev->next = pbc->next;
359 else
360 reg->pbc_sessions = pbc->next;
361 break;
362 }
363 prev = pbc;
364 pbc = pbc->next;
365 }
366
367 if (!pbc) {
368 pbc = os_zalloc(sizeof(*pbc));
369 if (pbc == NULL)
370 return;
371 os_memcpy(pbc->addr, addr, ETH_ALEN);
372 if (uuid_e)
373 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
374 }
375
376 pbc->next = reg->pbc_sessions;
377 reg->pbc_sessions = pbc;
378 pbc->timestamp = now;
379
380 /* remove entries that have timed out */
381 prev = pbc;
382 pbc = pbc->next;
383
384 while (pbc) {
385 if (os_reltime_expired(&now, &pbc->timestamp,
386 WPS_PBC_WALK_TIME)) {
387 prev->next = NULL;
388 wps_free_pbc_sessions(pbc);
389 break;
390 }
391 prev = pbc;
392 pbc = pbc->next;
393 }
394 }
395
396
wps_registrar_remove_pbc_session(struct wps_registrar * reg,const u8 * uuid_e,const u8 * p2p_dev_addr)397 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
398 const u8 *uuid_e,
399 const u8 *p2p_dev_addr)
400 {
401 struct wps_pbc_session *pbc, *prev = NULL, *tmp;
402
403 pbc = reg->pbc_sessions;
404 while (pbc) {
405 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
406 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
407 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
408 0)) {
409 if (prev)
410 prev->next = pbc->next;
411 else
412 reg->pbc_sessions = pbc->next;
413 tmp = pbc;
414 pbc = pbc->next;
415 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
416 "addr=" MACSTR, MAC2STR(tmp->addr));
417 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
418 tmp->uuid_e, WPS_UUID_LEN);
419 os_free(tmp);
420 continue;
421 }
422 prev = pbc;
423 pbc = pbc->next;
424 }
425 }
426
427
wps_registrar_pbc_overlap(struct wps_registrar * reg,const u8 * addr,const u8 * uuid_e)428 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
429 const u8 *addr, const u8 *uuid_e)
430 {
431 int count = 0;
432 struct wps_pbc_session *pbc;
433 struct wps_pbc_session *first = NULL;
434 struct os_reltime now;
435
436 os_get_reltime(&now);
437
438 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
439
440 if (uuid_e) {
441 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
442 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
443 uuid_e, WPS_UUID_LEN);
444 count++;
445 }
446
447 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
448 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
449 MAC2STR(pbc->addr));
450 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
451 pbc->uuid_e, WPS_UUID_LEN);
452 if (os_reltime_expired(&now, &pbc->timestamp,
453 WPS_PBC_WALK_TIME)) {
454 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired");
455 break;
456 }
457 if (first &&
458 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
459 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
460 continue; /* same Enrollee */
461 }
462 if (uuid_e == NULL ||
463 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
464 wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
465 count++;
466 }
467 if (first == NULL)
468 first = pbc;
469 }
470
471 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
472
473 return count > 1 ? 1 : 0;
474 }
475
476
wps_build_wps_state(struct wps_context * wps,struct wpabuf * msg)477 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
478 {
479 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
480 wps->wps_state);
481 wpabuf_put_be16(msg, ATTR_WPS_STATE);
482 wpabuf_put_be16(msg, 1);
483 wpabuf_put_u8(msg, wps->wps_state);
484 return 0;
485 }
486
487
488 #ifdef CONFIG_WPS_UPNP
wps_registrar_free_pending_m2(struct wps_context * wps)489 static void wps_registrar_free_pending_m2(struct wps_context *wps)
490 {
491 struct upnp_pending_message *p, *p2, *prev = NULL;
492 p = wps->upnp_msgs;
493 while (p) {
494 if (p->type == WPS_M2 || p->type == WPS_M2D) {
495 if (prev == NULL)
496 wps->upnp_msgs = p->next;
497 else
498 prev->next = p->next;
499 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
500 p2 = p;
501 p = p->next;
502 wpabuf_free(p2->msg);
503 os_free(p2);
504 continue;
505 }
506 prev = p;
507 p = p->next;
508 }
509 }
510 #endif /* CONFIG_WPS_UPNP */
511
512
wps_build_ap_setup_locked(struct wps_context * wps,struct wpabuf * msg)513 static int wps_build_ap_setup_locked(struct wps_context *wps,
514 struct wpabuf *msg)
515 {
516 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
517 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
518 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
519 wpabuf_put_be16(msg, 1);
520 wpabuf_put_u8(msg, 1);
521 }
522 return 0;
523 }
524
525
wps_build_selected_registrar(struct wps_registrar * reg,struct wpabuf * msg)526 static int wps_build_selected_registrar(struct wps_registrar *reg,
527 struct wpabuf *msg)
528 {
529 if (!reg->sel_reg_union)
530 return 0;
531 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
532 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
533 wpabuf_put_be16(msg, 1);
534 wpabuf_put_u8(msg, 1);
535 return 0;
536 }
537
538
wps_build_sel_reg_dev_password_id(struct wps_registrar * reg,struct wpabuf * msg)539 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
540 struct wpabuf *msg)
541 {
542 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
543 if (!reg->sel_reg_union)
544 return 0;
545 if (reg->sel_reg_dev_password_id_override >= 0)
546 id = reg->sel_reg_dev_password_id_override;
547 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
548 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
549 wpabuf_put_be16(msg, 2);
550 wpabuf_put_be16(msg, id);
551 return 0;
552 }
553
554
wps_build_sel_pbc_reg_uuid_e(struct wps_registrar * reg,struct wpabuf * msg)555 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
556 struct wpabuf *msg)
557 {
558 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
559 if (!reg->sel_reg_union)
560 return 0;
561 if (reg->sel_reg_dev_password_id_override >= 0)
562 id = reg->sel_reg_dev_password_id_override;
563 if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
564 return 0;
565 return wps_build_uuid_e(msg, reg->wps->uuid);
566 }
567
568
wps_set_pushbutton(u16 * methods,u16 conf_methods)569 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
570 {
571 *methods |= WPS_CONFIG_PUSHBUTTON;
572 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
573 WPS_CONFIG_VIRT_PUSHBUTTON)
574 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
575 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
576 WPS_CONFIG_PHY_PUSHBUTTON)
577 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
578 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
579 WPS_CONFIG_VIRT_PUSHBUTTON &&
580 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
581 WPS_CONFIG_PHY_PUSHBUTTON) {
582 /*
583 * Required to include virtual/physical flag, but we were not
584 * configured with push button type, so have to default to one
585 * of them.
586 */
587 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
588 }
589 }
590
591
wps_build_sel_reg_config_methods(struct wps_registrar * reg,struct wpabuf * msg)592 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
593 struct wpabuf *msg)
594 {
595 u16 methods;
596 if (!reg->sel_reg_union)
597 return 0;
598 methods = reg->wps->config_methods;
599 methods &= ~WPS_CONFIG_PUSHBUTTON;
600 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
601 WPS_CONFIG_PHY_PUSHBUTTON);
602 if (reg->pbc)
603 wps_set_pushbutton(&methods, reg->wps->config_methods);
604 if (reg->sel_reg_config_methods_override >= 0)
605 methods = reg->sel_reg_config_methods_override;
606 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
607 methods);
608 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
609 wpabuf_put_be16(msg, 2);
610 wpabuf_put_be16(msg, methods);
611 return 0;
612 }
613
614
wps_build_probe_config_methods(struct wps_registrar * reg,struct wpabuf * msg)615 static int wps_build_probe_config_methods(struct wps_registrar *reg,
616 struct wpabuf *msg)
617 {
618 u16 methods;
619 /*
620 * These are the methods that the AP supports as an Enrollee for adding
621 * external Registrars.
622 */
623 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
624 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
625 WPS_CONFIG_PHY_PUSHBUTTON);
626 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
627 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
628 wpabuf_put_be16(msg, 2);
629 wpabuf_put_be16(msg, methods);
630 return 0;
631 }
632
633
wps_build_config_methods_r(struct wps_registrar * reg,struct wpabuf * msg)634 static int wps_build_config_methods_r(struct wps_registrar *reg,
635 struct wpabuf *msg)
636 {
637 return wps_build_config_methods(msg, reg->wps->config_methods);
638 }
639
640
wps_authorized_macs(struct wps_registrar * reg,size_t * count)641 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
642 {
643 *count = 0;
644
645 while (*count < WPS_MAX_AUTHORIZED_MACS) {
646 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
647 break;
648 (*count)++;
649 }
650
651 return (const u8 *) reg->authorized_macs_union;
652 }
653
654
655 /**
656 * wps_registrar_init - Initialize WPS Registrar data
657 * @wps: Pointer to longterm WPS context
658 * @cfg: Registrar configuration
659 * Returns: Pointer to allocated Registrar data or %NULL on failure
660 *
661 * This function is used to initialize WPS Registrar functionality. It can be
662 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
663 * runs (e.g., when run as an internal Registrar in an AP). Caller is
664 * responsible for freeing the returned data with wps_registrar_deinit() when
665 * Registrar functionality is not needed anymore.
666 */
667 struct wps_registrar *
wps_registrar_init(struct wps_context * wps,const struct wps_registrar_config * cfg)668 wps_registrar_init(struct wps_context *wps,
669 const struct wps_registrar_config *cfg)
670 {
671 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
672 if (reg == NULL)
673 return NULL;
674
675 dl_list_init(®->pins);
676 dl_list_init(®->nfc_pw_tokens);
677 reg->wps = wps;
678 reg->new_psk_cb = cfg->new_psk_cb;
679 reg->set_ie_cb = cfg->set_ie_cb;
680 reg->pin_needed_cb = cfg->pin_needed_cb;
681 reg->reg_success_cb = cfg->reg_success_cb;
682 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
683 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
684 reg->cb_ctx = cfg->cb_ctx;
685 reg->skip_cred_build = cfg->skip_cred_build;
686 if (cfg->extra_cred) {
687 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
688 cfg->extra_cred_len);
689 if (reg->extra_cred == NULL) {
690 os_free(reg);
691 return NULL;
692 }
693 }
694 reg->disable_auto_conf = cfg->disable_auto_conf;
695 reg->sel_reg_dev_password_id_override = -1;
696 reg->sel_reg_config_methods_override = -1;
697 reg->static_wep_only = cfg->static_wep_only;
698 reg->dualband = cfg->dualband;
699 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk;
700
701 if (cfg->multi_ap_backhaul_ssid) {
702 os_memcpy(reg->multi_ap_backhaul_ssid,
703 cfg->multi_ap_backhaul_ssid,
704 cfg->multi_ap_backhaul_ssid_len);
705 reg->multi_ap_backhaul_ssid_len =
706 cfg->multi_ap_backhaul_ssid_len;
707 }
708 if (cfg->multi_ap_backhaul_network_key) {
709 reg->multi_ap_backhaul_network_key =
710 os_memdup(cfg->multi_ap_backhaul_network_key,
711 cfg->multi_ap_backhaul_network_key_len);
712 if (reg->multi_ap_backhaul_network_key)
713 reg->multi_ap_backhaul_network_key_len =
714 cfg->multi_ap_backhaul_network_key_len;
715 }
716
717 if (wps_set_ie(reg)) {
718 wps_registrar_deinit(reg);
719 return NULL;
720 }
721
722 return reg;
723 }
724
725
wps_registrar_flush(struct wps_registrar * reg)726 void wps_registrar_flush(struct wps_registrar *reg)
727 {
728 if (reg == NULL)
729 return;
730 wps_free_pins(®->pins);
731 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0);
732 wps_free_pbc_sessions(reg->pbc_sessions);
733 reg->pbc_sessions = NULL;
734 wps_free_devices(reg->devices);
735 reg->devices = NULL;
736 #ifdef WPS_WORKAROUNDS
737 reg->pbc_ignore_start.sec = 0;
738 #endif /* WPS_WORKAROUNDS */
739 }
740
741
742 /**
743 * wps_registrar_deinit - Deinitialize WPS Registrar data
744 * @reg: Registrar data from wps_registrar_init()
745 */
wps_registrar_deinit(struct wps_registrar * reg)746 void wps_registrar_deinit(struct wps_registrar *reg)
747 {
748 if (reg == NULL)
749 return;
750 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
751 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
752 wps_registrar_flush(reg);
753 wpabuf_clear_free(reg->extra_cred);
754 bin_clear_free(reg->multi_ap_backhaul_network_key,
755 reg->multi_ap_backhaul_network_key_len);
756 os_free(reg);
757 }
758
759
wps_registrar_invalidate_unused(struct wps_registrar * reg)760 static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
761 {
762 struct wps_uuid_pin *pin;
763
764 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
765 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
766 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
767 "configured wildcard PIN");
768 wps_registrar_remove_pin(reg, pin);
769 break;
770 }
771 }
772 }
773
774
775 /**
776 * wps_registrar_add_pin - Configure a new PIN for Registrar
777 * @reg: Registrar data from wps_registrar_init()
778 * @addr: Enrollee MAC address or %NULL if not known
779 * @uuid: UUID-E or %NULL for wildcard (any UUID)
780 * @pin: PIN (Device Password)
781 * @pin_len: Length of pin in octets
782 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
783 * Returns: 0 on success, -1 on failure
784 */
wps_registrar_add_pin(struct wps_registrar * reg,const u8 * addr,const u8 * uuid,const u8 * pin,size_t pin_len,int timeout)785 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
786 const u8 *uuid, const u8 *pin, size_t pin_len,
787 int timeout)
788 {
789 struct wps_uuid_pin *p;
790
791 p = os_zalloc(sizeof(*p));
792 if (p == NULL)
793 return -1;
794 if (addr)
795 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
796 if (uuid == NULL)
797 p->wildcard_uuid = 1;
798 else
799 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
800 p->pin = os_memdup(pin, pin_len);
801 if (p->pin == NULL) {
802 os_free(p);
803 return -1;
804 }
805 p->pin_len = pin_len;
806
807 if (timeout) {
808 p->flags |= PIN_EXPIRES;
809 os_get_reltime(&p->expiration);
810 p->expiration.sec += timeout;
811 }
812
813 if (p->wildcard_uuid)
814 wps_registrar_invalidate_unused(reg);
815
816 dl_list_add(®->pins, &p->list);
817
818 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
819 timeout);
820 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
821 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
822 reg->selected_registrar = 1;
823 reg->pbc = 0;
824 if (addr)
825 wps_registrar_add_authorized_mac(reg, addr);
826 else
827 wps_registrar_add_authorized_mac(
828 reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
829 wps_registrar_selected_registrar_changed(reg, 0);
830 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
831 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
832 wps_registrar_set_selected_timeout,
833 reg, NULL);
834
835 return 0;
836 }
837
838
wps_registrar_remove_pin(struct wps_registrar * reg,struct wps_uuid_pin * pin)839 static void wps_registrar_remove_pin(struct wps_registrar *reg,
840 struct wps_uuid_pin *pin)
841 {
842 u8 *addr;
843 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
844
845 if (is_zero_ether_addr(pin->enrollee_addr))
846 addr = bcast;
847 else
848 addr = pin->enrollee_addr;
849 wps_registrar_remove_authorized_mac(reg, addr);
850 wps_remove_pin(pin);
851 wps_registrar_selected_registrar_changed(reg, 0);
852 }
853
854
wps_registrar_expire_pins(struct wps_registrar * reg)855 static void wps_registrar_expire_pins(struct wps_registrar *reg)
856 {
857 struct wps_uuid_pin *pin, *prev;
858 struct os_reltime now;
859
860 os_get_reltime(&now);
861 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
862 {
863 if ((pin->flags & PIN_EXPIRES) &&
864 os_reltime_before(&pin->expiration, &now)) {
865 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
866 pin->uuid, WPS_UUID_LEN);
867 wps_registrar_remove_pin(reg, pin);
868 }
869 }
870 }
871
872
873 /**
874 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
875 * @reg: Registrar data from wps_registrar_init()
876 * @dev_pw: PIN to search for or %NULL to match any
877 * @dev_pw_len: Length of dev_pw in octets
878 * Returns: 0 on success, -1 if not wildcard PIN is enabled
879 */
wps_registrar_invalidate_wildcard_pin(struct wps_registrar * reg,const u8 * dev_pw,size_t dev_pw_len)880 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
881 const u8 *dev_pw,
882 size_t dev_pw_len)
883 {
884 struct wps_uuid_pin *pin, *prev;
885
886 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
887 {
888 if (dev_pw && pin->pin &&
889 (dev_pw_len != pin->pin_len ||
890 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0))
891 continue; /* different PIN */
892 if (pin->wildcard_uuid) {
893 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
894 pin->uuid, WPS_UUID_LEN);
895 wps_registrar_remove_pin(reg, pin);
896 return 0;
897 }
898 }
899
900 return -1;
901 }
902
903
904 /**
905 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
906 * @reg: Registrar data from wps_registrar_init()
907 * @uuid: UUID-E
908 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
909 */
wps_registrar_invalidate_pin(struct wps_registrar * reg,const u8 * uuid)910 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
911 {
912 struct wps_uuid_pin *pin, *prev;
913
914 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
915 {
916 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
917 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
918 pin->uuid, WPS_UUID_LEN);
919 wps_registrar_remove_pin(reg, pin);
920 return 0;
921 }
922 }
923
924 return -1;
925 }
926
927
wps_registrar_get_pin(struct wps_registrar * reg,const u8 * uuid,size_t * pin_len)928 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
929 const u8 *uuid, size_t *pin_len)
930 {
931 struct wps_uuid_pin *pin, *found = NULL;
932 int wildcard = 0;
933
934 wps_registrar_expire_pins(reg);
935
936 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
937 if (!pin->wildcard_uuid &&
938 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
939 found = pin;
940 break;
941 }
942 }
943
944 if (!found) {
945 /* Check for wildcard UUIDs since none of the UUID-specific
946 * PINs matched */
947 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
948 if (pin->wildcard_uuid == 1 ||
949 pin->wildcard_uuid == 2) {
950 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
951 "PIN. Assigned it for this UUID-E");
952 wildcard = 1;
953 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
954 found = pin;
955 break;
956 }
957 }
958 }
959
960 if (!found)
961 return NULL;
962
963 /*
964 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
965 * that could otherwise avoid PIN invalidations.
966 */
967 if (found->flags & PIN_LOCKED) {
968 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
969 "allow concurrent re-use");
970 return NULL;
971 }
972 *pin_len = found->pin_len;
973 found->flags |= PIN_LOCKED;
974 if (wildcard)
975 found->wildcard_uuid++;
976 return found->pin;
977 }
978
979
980 /**
981 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
982 * @reg: Registrar data from wps_registrar_init()
983 * @uuid: UUID-E
984 * Returns: 0 on success, -1 on failure
985 *
986 * PINs are locked to enforce only one concurrent use. This function unlocks a
987 * PIN to allow it to be used again. If the specified PIN was configured using
988 * a wildcard UUID, it will be removed instead of allowing multiple uses.
989 */
wps_registrar_unlock_pin(struct wps_registrar * reg,const u8 * uuid)990 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
991 {
992 struct wps_uuid_pin *pin;
993
994 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
995 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
996 if (pin->wildcard_uuid == 3) {
997 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
998 "wildcard PIN");
999 return wps_registrar_invalidate_pin(reg, uuid);
1000 }
1001 pin->flags &= ~PIN_LOCKED;
1002 return 0;
1003 }
1004 }
1005
1006 return -1;
1007 }
1008
1009
wps_registrar_stop_pbc(struct wps_registrar * reg)1010 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
1011 {
1012 reg->selected_registrar = 0;
1013 reg->pbc = 0;
1014 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1015 wps_registrar_remove_authorized_mac(reg,
1016 (u8 *) "\xff\xff\xff\xff\xff\xff");
1017 wps_registrar_selected_registrar_changed(reg, 0);
1018 }
1019
1020
wps_registrar_pbc_timeout(void * eloop_ctx,void * timeout_ctx)1021 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
1022 {
1023 struct wps_registrar *reg = eloop_ctx;
1024
1025 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
1026 wps_pbc_timeout_event(reg->wps);
1027 wps_registrar_stop_pbc(reg);
1028 }
1029
1030
1031 /**
1032 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
1033 * @reg: Registrar data from wps_registrar_init()
1034 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
1035 * indicates no such filtering
1036 * Returns: 0 on success, -1 on failure, -2 on session overlap
1037 *
1038 * This function is called on an AP when a push button is pushed to activate
1039 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
1040 * or when a PBC registration is completed. If more than one Enrollee in active
1041 * PBC mode has been detected during the monitor time (previous 2 minutes), the
1042 * PBC mode is not activated and -2 is returned to indicate session overlap.
1043 * This is skipped if a specific Enrollee is selected.
1044 */
wps_registrar_button_pushed(struct wps_registrar * reg,const u8 * p2p_dev_addr)1045 int wps_registrar_button_pushed(struct wps_registrar *reg,
1046 const u8 *p2p_dev_addr)
1047 {
1048 if (p2p_dev_addr == NULL &&
1049 wps_registrar_pbc_overlap(reg, NULL, NULL)) {
1050 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
1051 "mode");
1052 wps_pbc_overlap_event(reg->wps);
1053 return -2;
1054 }
1055 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
1056 reg->force_pbc_overlap = 0;
1057 reg->selected_registrar = 1;
1058 reg->pbc = 1;
1059 if (p2p_dev_addr)
1060 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
1061 else
1062 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1063 wps_registrar_add_authorized_mac(reg,
1064 (u8 *) "\xff\xff\xff\xff\xff\xff");
1065 wps_registrar_selected_registrar_changed(reg, 0);
1066
1067 wps_pbc_active_event(reg->wps);
1068 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1069 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1070 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1071 reg, NULL);
1072 return 0;
1073 }
1074
1075
wps_registrar_pbc_completed(struct wps_registrar * reg)1076 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1077 {
1078 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1079 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1080 wps_registrar_stop_pbc(reg);
1081 wps_pbc_disable_event(reg->wps);
1082 }
1083
1084
wps_registrar_pin_completed(struct wps_registrar * reg)1085 static void wps_registrar_pin_completed(struct wps_registrar *reg)
1086 {
1087 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1088 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1089 reg->selected_registrar = 0;
1090 wps_registrar_selected_registrar_changed(reg, 0);
1091 }
1092
1093
wps_registrar_complete(struct wps_registrar * registrar,const u8 * uuid_e,const u8 * dev_pw,size_t dev_pw_len)1094 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1095 const u8 *dev_pw, size_t dev_pw_len)
1096 {
1097 if (registrar->pbc) {
1098 wps_registrar_remove_pbc_session(registrar,
1099 uuid_e, NULL);
1100 wps_registrar_pbc_completed(registrar);
1101 #ifdef WPS_WORKAROUNDS
1102 os_get_reltime(®istrar->pbc_ignore_start);
1103 #endif /* WPS_WORKAROUNDS */
1104 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1105 } else {
1106 wps_registrar_pin_completed(registrar);
1107 }
1108
1109 if (dev_pw &&
1110 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1111 dev_pw_len) == 0) {
1112 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1113 dev_pw, dev_pw_len);
1114 }
1115 }
1116
1117
wps_registrar_wps_cancel(struct wps_registrar * reg)1118 int wps_registrar_wps_cancel(struct wps_registrar *reg)
1119 {
1120 if (reg->pbc) {
1121 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1122 wps_registrar_pbc_timeout(reg, NULL);
1123 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1124 return 1;
1125 } else if (reg->selected_registrar) {
1126 /* PIN Method */
1127 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1128 wps_registrar_pin_completed(reg);
1129 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1130 return 1;
1131 }
1132 return 0;
1133 }
1134
1135
1136 /**
1137 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1138 * @reg: Registrar data from wps_registrar_init()
1139 * @addr: MAC address of the Probe Request sender
1140 * @wps_data: WPS IE contents
1141 *
1142 * This function is called on an AP when a Probe Request with WPS IE is
1143 * received. This is used to track PBC mode use and to detect possible overlap
1144 * situation with other WPS APs.
1145 */
wps_registrar_probe_req_rx(struct wps_registrar * reg,const u8 * addr,const struct wpabuf * wps_data,int p2p_wildcard)1146 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1147 const struct wpabuf *wps_data,
1148 int p2p_wildcard)
1149 {
1150 struct wps_parse_attr attr;
1151 int skip_add = 0;
1152
1153 wpa_hexdump_buf(MSG_MSGDUMP,
1154 "WPS: Probe Request with WPS data received",
1155 wps_data);
1156
1157 if (wps_parse_msg(wps_data, &attr) < 0)
1158 return;
1159
1160 if (attr.config_methods == NULL) {
1161 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1162 "Probe Request");
1163 return;
1164 }
1165
1166 if (attr.dev_password_id == NULL) {
1167 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1168 "in Probe Request");
1169 return;
1170 }
1171
1172 if (reg->enrollee_seen_cb && attr.uuid_e &&
1173 attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1174 char *dev_name = NULL;
1175 if (attr.dev_name) {
1176 dev_name = os_zalloc(attr.dev_name_len + 1);
1177 if (dev_name) {
1178 os_memcpy(dev_name, attr.dev_name,
1179 attr.dev_name_len);
1180 }
1181 }
1182 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1183 attr.primary_dev_type,
1184 WPA_GET_BE16(attr.config_methods),
1185 WPA_GET_BE16(attr.dev_password_id),
1186 *attr.request_type, dev_name);
1187 os_free(dev_name);
1188 }
1189
1190 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1191 return; /* Not PBC */
1192
1193 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1194 MACSTR, MAC2STR(addr));
1195 if (attr.uuid_e == NULL) {
1196 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1197 "UUID-E included");
1198 return;
1199 }
1200 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1201 WPS_UUID_LEN);
1202
1203 #ifdef WPS_WORKAROUNDS
1204 if (reg->pbc_ignore_start.sec &&
1205 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1206 struct os_reltime now, dur;
1207 os_get_reltime(&now);
1208 os_reltime_sub(&now, ®->pbc_ignore_start, &dur);
1209 if (dur.sec >= 0 && dur.sec < 5) {
1210 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1211 "based on Probe Request from the Enrollee "
1212 "that just completed PBC provisioning");
1213 skip_add = 1;
1214 } else
1215 reg->pbc_ignore_start.sec = 0;
1216 }
1217 #endif /* WPS_WORKAROUNDS */
1218
1219 if (!skip_add)
1220 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1221 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1222 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1223 reg->force_pbc_overlap = 1;
1224 wps_pbc_overlap_event(reg->wps);
1225 }
1226 }
1227
1228
wps_cb_new_psk(struct wps_registrar * reg,const u8 * mac_addr,const u8 * p2p_dev_addr,const u8 * psk,size_t psk_len)1229 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1230 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len)
1231 {
1232 if (reg->new_psk_cb == NULL)
1233 return 0;
1234
1235 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk,
1236 psk_len);
1237 }
1238
1239
wps_cb_pin_needed(struct wps_registrar * reg,const u8 * uuid_e,const struct wps_device_data * dev)1240 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1241 const struct wps_device_data *dev)
1242 {
1243 if (reg->pin_needed_cb == NULL)
1244 return;
1245
1246 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1247 }
1248
1249
wps_cb_reg_success(struct wps_registrar * reg,const u8 * mac_addr,const u8 * uuid_e,const u8 * dev_pw,size_t dev_pw_len)1250 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1251 const u8 *uuid_e, const u8 *dev_pw,
1252 size_t dev_pw_len)
1253 {
1254 if (reg->reg_success_cb == NULL)
1255 return;
1256
1257 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1258 }
1259
1260
wps_cb_set_ie(struct wps_registrar * reg,struct wpabuf * beacon_ie,struct wpabuf * probe_resp_ie)1261 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1262 struct wpabuf *probe_resp_ie)
1263 {
1264 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1265 }
1266
1267
wps_cb_set_sel_reg(struct wps_registrar * reg)1268 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1269 {
1270 u16 methods = 0;
1271 if (reg->set_sel_reg_cb == NULL)
1272 return;
1273
1274 if (reg->selected_registrar) {
1275 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1276 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1277 WPS_CONFIG_PHY_PUSHBUTTON);
1278 if (reg->pbc)
1279 wps_set_pushbutton(&methods, reg->wps->config_methods);
1280 }
1281
1282 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1283 "config_methods=0x%x pbc=%d methods=0x%x",
1284 reg->selected_registrar, reg->wps->config_methods,
1285 reg->pbc, methods);
1286
1287 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1288 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1289 methods);
1290 }
1291
1292
wps_set_ie(struct wps_registrar * reg)1293 static int wps_set_ie(struct wps_registrar *reg)
1294 {
1295 struct wpabuf *beacon;
1296 struct wpabuf *probe;
1297 const u8 *auth_macs;
1298 size_t count;
1299 size_t vendor_len = 0;
1300 int i;
1301
1302 if (reg->set_ie_cb == NULL)
1303 return 0;
1304
1305 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1306 if (reg->wps->dev.vendor_ext[i]) {
1307 vendor_len += 2 + 2;
1308 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1309 }
1310 }
1311
1312 beacon = wpabuf_alloc(400 + vendor_len);
1313 if (beacon == NULL)
1314 return -1;
1315 probe = wpabuf_alloc(500 + vendor_len);
1316 if (probe == NULL) {
1317 wpabuf_free(beacon);
1318 return -1;
1319 }
1320
1321 auth_macs = wps_authorized_macs(reg, &count);
1322
1323 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1324
1325 if (wps_build_version(beacon) ||
1326 wps_build_wps_state(reg->wps, beacon) ||
1327 wps_build_ap_setup_locked(reg->wps, beacon) ||
1328 wps_build_selected_registrar(reg, beacon) ||
1329 wps_build_sel_reg_dev_password_id(reg, beacon) ||
1330 wps_build_sel_reg_config_methods(reg, beacon) ||
1331 wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1332 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) ||
1333 wps_build_wfa_ext(beacon, 0, auth_macs, count, 0) ||
1334 wps_build_vendor_ext(®->wps->dev, beacon)) {
1335 wpabuf_free(beacon);
1336 wpabuf_free(probe);
1337 return -1;
1338 }
1339
1340 #ifdef CONFIG_P2P
1341 if (wps_build_dev_name(®->wps->dev, beacon) ||
1342 wps_build_primary_dev_type(®->wps->dev, beacon)) {
1343 wpabuf_free(beacon);
1344 wpabuf_free(probe);
1345 return -1;
1346 }
1347 #endif /* CONFIG_P2P */
1348
1349 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1350
1351 if (wps_build_version(probe) ||
1352 wps_build_wps_state(reg->wps, probe) ||
1353 wps_build_ap_setup_locked(reg->wps, probe) ||
1354 wps_build_selected_registrar(reg, probe) ||
1355 wps_build_sel_reg_dev_password_id(reg, probe) ||
1356 wps_build_sel_reg_config_methods(reg, probe) ||
1357 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1358 WPS_RESP_REGISTRAR) ||
1359 wps_build_uuid_e(probe, reg->wps->uuid) ||
1360 wps_build_device_attrs(®->wps->dev, probe) ||
1361 wps_build_probe_config_methods(reg, probe) ||
1362 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) ||
1363 wps_build_wfa_ext(probe, 0, auth_macs, count, 0) ||
1364 wps_build_vendor_ext(®->wps->dev, probe)) {
1365 wpabuf_free(beacon);
1366 wpabuf_free(probe);
1367 return -1;
1368 }
1369
1370 beacon = wps_ie_encapsulate(beacon);
1371 probe = wps_ie_encapsulate(probe);
1372
1373 if (!beacon || !probe) {
1374 wpabuf_free(beacon);
1375 wpabuf_free(probe);
1376 return -1;
1377 }
1378
1379 if (reg->static_wep_only) {
1380 /*
1381 * Windows XP and Vista clients can get confused about
1382 * EAP-Identity/Request when they probe the network with
1383 * EAPOL-Start. In such a case, they may assume the network is
1384 * using IEEE 802.1X and prompt user for a certificate while
1385 * the correct (non-WPS) behavior would be to ask for the
1386 * static WEP key. As a workaround, use Microsoft Provisioning
1387 * IE to advertise that legacy 802.1X is not supported.
1388 */
1389 const u8 ms_wps[7] = {
1390 WLAN_EID_VENDOR_SPECIFIC, 5,
1391 /* Microsoft Provisioning IE (00:50:f2:5) */
1392 0x00, 0x50, 0xf2, 5,
1393 0x00 /* no legacy 802.1X or MS WPS */
1394 };
1395 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1396 "into Beacon/Probe Response frames");
1397 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1398 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1399 }
1400
1401 return wps_cb_set_ie(reg, beacon, probe);
1402 }
1403
1404
wps_get_dev_password(struct wps_data * wps)1405 static int wps_get_dev_password(struct wps_data *wps)
1406 {
1407 const u8 *pin;
1408 size_t pin_len = 0;
1409
1410 bin_clear_free(wps->dev_password, wps->dev_password_len);
1411 wps->dev_password = NULL;
1412
1413 if (wps->pbc) {
1414 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1415 pin = (const u8 *) "00000000";
1416 pin_len = 8;
1417 #ifdef CONFIG_WPS_NFC
1418 } else if (wps->nfc_pw_token) {
1419 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
1420 {
1421 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection "
1422 "handover and abbreviated WPS handshake "
1423 "without Device Password");
1424 return 0;
1425 }
1426 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1427 "Password Token");
1428 pin = wps->nfc_pw_token->dev_pw;
1429 pin_len = wps->nfc_pw_token->dev_pw_len;
1430 } else if (wps->dev_pw_id >= 0x10 &&
1431 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
1432 wps->wps->ap_nfc_dev_pw) {
1433 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token");
1434 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw);
1435 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw);
1436 #endif /* CONFIG_WPS_NFC */
1437 } else {
1438 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1439 &pin_len);
1440 if (pin && wps->dev_pw_id >= 0x10) {
1441 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device "
1442 "Password ID, but PIN found");
1443 /*
1444 * See whether Enrollee is willing to use PIN instead.
1445 */
1446 wps->dev_pw_id = DEV_PW_DEFAULT;
1447 }
1448 }
1449 if (pin == NULL) {
1450 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1451 "the Enrollee (context %p registrar %p)",
1452 wps->wps, wps->wps->registrar);
1453 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1454 &wps->peer_dev);
1455 return -1;
1456 }
1457
1458 wps->dev_password = os_memdup(pin, pin_len);
1459 if (wps->dev_password == NULL)
1460 return -1;
1461 wps->dev_password_len = pin_len;
1462
1463 return 0;
1464 }
1465
1466
wps_build_uuid_r(struct wps_data * wps,struct wpabuf * msg)1467 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1468 {
1469 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1470 wpabuf_put_be16(msg, ATTR_UUID_R);
1471 wpabuf_put_be16(msg, WPS_UUID_LEN);
1472 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1473 return 0;
1474 }
1475
1476
wps_build_r_hash(struct wps_data * wps,struct wpabuf * msg)1477 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1478 {
1479 u8 *hash;
1480 const u8 *addr[4];
1481 size_t len[4];
1482
1483 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1484 return -1;
1485 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1486 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1487 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1488
1489 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1490 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1491 "R-Hash derivation");
1492 return -1;
1493 }
1494
1495 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1496 wpabuf_put_be16(msg, ATTR_R_HASH1);
1497 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1498 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1499 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1500 addr[0] = wps->snonce;
1501 len[0] = WPS_SECRET_NONCE_LEN;
1502 addr[1] = wps->psk1;
1503 len[1] = WPS_PSK_LEN;
1504 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1505 len[2] = wpabuf_len(wps->dh_pubkey_e);
1506 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1507 len[3] = wpabuf_len(wps->dh_pubkey_r);
1508 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1509 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1510
1511 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1512 wpabuf_put_be16(msg, ATTR_R_HASH2);
1513 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1514 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1515 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1516 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1517 addr[1] = wps->psk2;
1518 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1519 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1520
1521 return 0;
1522 }
1523
1524
wps_build_r_snonce1(struct wps_data * wps,struct wpabuf * msg)1525 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1526 {
1527 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1528 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1529 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1530 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1531 return 0;
1532 }
1533
1534
wps_build_r_snonce2(struct wps_data * wps,struct wpabuf * msg)1535 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1536 {
1537 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1538 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1539 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1540 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1541 WPS_SECRET_NONCE_LEN);
1542 return 0;
1543 }
1544
1545
wps_build_cred_network_idx(struct wpabuf * msg,const struct wps_credential * cred)1546 static int wps_build_cred_network_idx(struct wpabuf *msg,
1547 const struct wps_credential *cred)
1548 {
1549 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1550 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1551 wpabuf_put_be16(msg, 1);
1552 wpabuf_put_u8(msg, 1);
1553 return 0;
1554 }
1555
1556
wps_build_cred_ssid(struct wpabuf * msg,const struct wps_credential * cred)1557 static int wps_build_cred_ssid(struct wpabuf *msg,
1558 const struct wps_credential *cred)
1559 {
1560 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1561 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1562 cred->ssid, cred->ssid_len);
1563 wpabuf_put_be16(msg, ATTR_SSID);
1564 wpabuf_put_be16(msg, cred->ssid_len);
1565 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1566 return 0;
1567 }
1568
1569
wps_build_cred_auth_type(struct wpabuf * msg,const struct wps_credential * cred)1570 static int wps_build_cred_auth_type(struct wpabuf *msg,
1571 const struct wps_credential *cred)
1572 {
1573 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1574 cred->auth_type);
1575 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1576 wpabuf_put_be16(msg, 2);
1577 wpabuf_put_be16(msg, cred->auth_type);
1578 return 0;
1579 }
1580
1581
wps_build_cred_encr_type(struct wpabuf * msg,const struct wps_credential * cred)1582 static int wps_build_cred_encr_type(struct wpabuf *msg,
1583 const struct wps_credential *cred)
1584 {
1585 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1586 cred->encr_type);
1587 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1588 wpabuf_put_be16(msg, 2);
1589 wpabuf_put_be16(msg, cred->encr_type);
1590 return 0;
1591 }
1592
1593
wps_build_cred_network_key(struct wpabuf * msg,const struct wps_credential * cred)1594 static int wps_build_cred_network_key(struct wpabuf *msg,
1595 const struct wps_credential *cred)
1596 {
1597 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1598 (int) cred->key_len);
1599 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1600 cred->key, cred->key_len);
1601 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1602 wpabuf_put_be16(msg, cred->key_len);
1603 wpabuf_put_data(msg, cred->key, cred->key_len);
1604 return 0;
1605 }
1606
1607
wps_build_credential(struct wpabuf * msg,const struct wps_credential * cred)1608 static int wps_build_credential(struct wpabuf *msg,
1609 const struct wps_credential *cred)
1610 {
1611 if (wps_build_cred_network_idx(msg, cred) ||
1612 wps_build_cred_ssid(msg, cred) ||
1613 wps_build_cred_auth_type(msg, cred) ||
1614 wps_build_cred_encr_type(msg, cred) ||
1615 wps_build_cred_network_key(msg, cred) ||
1616 wps_build_mac_addr(msg, cred->mac_addr))
1617 return -1;
1618 return 0;
1619 }
1620
1621
wps_build_credential_wrap(struct wpabuf * msg,const struct wps_credential * cred)1622 int wps_build_credential_wrap(struct wpabuf *msg,
1623 const struct wps_credential *cred)
1624 {
1625 struct wpabuf *wbuf;
1626 wbuf = wpabuf_alloc(200);
1627 if (wbuf == NULL)
1628 return -1;
1629 if (wps_build_credential(wbuf, cred)) {
1630 wpabuf_clear_free(wbuf);
1631 return -1;
1632 }
1633 wpabuf_put_be16(msg, ATTR_CRED);
1634 wpabuf_put_be16(msg, wpabuf_len(wbuf));
1635 wpabuf_put_buf(msg, wbuf);
1636 wpabuf_clear_free(wbuf);
1637 return 0;
1638 }
1639
1640
wps_build_cred(struct wps_data * wps,struct wpabuf * msg)1641 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1642 {
1643 struct wpabuf *cred;
1644 struct wps_registrar *reg = wps->wps->registrar;
1645
1646 if (wps->wps->registrar->skip_cred_build)
1647 goto skip_cred_build;
1648
1649 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1650 if (wps->use_cred) {
1651 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1652 goto use_provided;
1653 }
1654 os_memset(&wps->cred, 0, sizeof(wps->cred));
1655
1656 if (wps->peer_dev.multi_ap_ext == MULTI_AP_BACKHAUL_STA &&
1657 reg->multi_ap_backhaul_ssid_len) {
1658 wpa_printf(MSG_DEBUG, "WPS: Use backhaul STA credentials");
1659 os_memcpy(wps->cred.ssid, reg->multi_ap_backhaul_ssid,
1660 reg->multi_ap_backhaul_ssid_len);
1661 wps->cred.ssid_len = reg->multi_ap_backhaul_ssid_len;
1662 /* Backhaul is always WPA2PSK */
1663 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
1664 wps->cred.encr_type = WPS_ENCR_AES;
1665 /* Set MAC address in the Credential to be the Enrollee's MAC
1666 * address
1667 */
1668 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1669 if (reg->multi_ap_backhaul_network_key) {
1670 os_memcpy(wps->cred.key,
1671 reg->multi_ap_backhaul_network_key,
1672 reg->multi_ap_backhaul_network_key_len);
1673 wps->cred.key_len =
1674 reg->multi_ap_backhaul_network_key_len;
1675 }
1676 goto use_provided;
1677 }
1678
1679 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1680 wps->cred.ssid_len = wps->wps->ssid_len;
1681
1682 /* Select the best authentication and encryption type */
1683 wpa_printf(MSG_DEBUG,
1684 "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x",
1685 wps->wps->auth_types, wps->auth_type);
1686 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1687 wps->auth_type = WPS_AUTH_WPA2PSK;
1688 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1689 wps->auth_type = WPS_AUTH_WPAPSK;
1690 else if (wps->auth_type & WPS_AUTH_OPEN)
1691 wps->auth_type = WPS_AUTH_OPEN;
1692 else {
1693 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1694 wps->auth_type);
1695 return -1;
1696 }
1697 wps->cred.auth_type = wps->auth_type;
1698
1699 wpa_printf(MSG_DEBUG,
1700 "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x",
1701 wps->wps->encr_types, wps->wps->encr_types_rsn,
1702 wps->wps->encr_types_wpa, wps->encr_type);
1703 if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK)
1704 wps->encr_type &= wps->wps->encr_types_rsn;
1705 else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK)
1706 wps->encr_type &= wps->wps->encr_types_wpa;
1707 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1708 wps->auth_type == WPS_AUTH_WPAPSK) {
1709 if (wps->encr_type & WPS_ENCR_AES)
1710 wps->encr_type = WPS_ENCR_AES;
1711 else if (wps->encr_type & WPS_ENCR_TKIP)
1712 wps->encr_type = WPS_ENCR_TKIP;
1713 else {
1714 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1715 "type for WPA/WPA2");
1716 return -1;
1717 }
1718 } else {
1719 if (wps->encr_type & WPS_ENCR_NONE)
1720 wps->encr_type = WPS_ENCR_NONE;
1721 #ifdef CONFIG_TESTING_OPTIONS
1722 else if (wps->encr_type & WPS_ENCR_WEP)
1723 wps->encr_type = WPS_ENCR_WEP;
1724 #endif /* CONFIG_TESTING_OPTIONS */
1725 else {
1726 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1727 "type for non-WPA/WPA2 mode");
1728 return -1;
1729 }
1730 }
1731 wps->cred.encr_type = wps->encr_type;
1732 /*
1733 * Set MAC address in the Credential to be the Enrollee's MAC address
1734 */
1735 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1736
1737 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1738 !wps->wps->registrar->disable_auto_conf) {
1739 u8 r[16];
1740 /* Generate a random passphrase */
1741 if (random_pool_ready() != 1 ||
1742 random_get_bytes(r, sizeof(r)) < 0) {
1743 wpa_printf(MSG_INFO,
1744 "WPS: Could not generate random PSK");
1745 return -1;
1746 }
1747 os_free(wps->new_psk);
1748 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1749 if (wps->new_psk == NULL)
1750 return -1;
1751 wps->new_psk_len--; /* remove newline */
1752 while (wps->new_psk_len &&
1753 wps->new_psk[wps->new_psk_len - 1] == '=')
1754 wps->new_psk_len--;
1755 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1756 wps->new_psk, wps->new_psk_len);
1757 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1758 wps->cred.key_len = wps->new_psk_len;
1759 } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1760 wps->use_psk_key && wps->wps->psk_set) {
1761 char hex[65];
1762 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1763 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1764 os_memcpy(wps->cred.key, hex, 32 * 2);
1765 wps->cred.key_len = 32 * 2;
1766 } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1767 wps->wps->network_key) {
1768 os_memcpy(wps->cred.key, wps->wps->network_key,
1769 wps->wps->network_key_len);
1770 wps->cred.key_len = wps->wps->network_key_len;
1771 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1772 char hex[65];
1773 /* Generate a random per-device PSK */
1774 os_free(wps->new_psk);
1775 wps->new_psk_len = 32;
1776 wps->new_psk = os_malloc(wps->new_psk_len);
1777 if (wps->new_psk == NULL)
1778 return -1;
1779 if (random_pool_ready() != 1 ||
1780 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1781 wpa_printf(MSG_INFO,
1782 "WPS: Could not generate random PSK");
1783 os_free(wps->new_psk);
1784 wps->new_psk = NULL;
1785 return -1;
1786 }
1787 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1788 wps->new_psk, wps->new_psk_len);
1789 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1790 wps->new_psk_len);
1791 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1792 wps->cred.key_len = wps->new_psk_len * 2;
1793 }
1794
1795 use_provided:
1796 #ifdef CONFIG_WPS_TESTING
1797 if (wps_testing_dummy_cred)
1798 cred = wpabuf_alloc(200);
1799 else
1800 cred = NULL;
1801 if (cred) {
1802 struct wps_credential dummy;
1803 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1804 os_memset(&dummy, 0, sizeof(dummy));
1805 os_memcpy(dummy.ssid, "dummy", 5);
1806 dummy.ssid_len = 5;
1807 dummy.auth_type = WPS_AUTH_WPA2PSK;
1808 dummy.encr_type = WPS_ENCR_AES;
1809 os_memcpy(dummy.key, "dummy psk", 9);
1810 dummy.key_len = 9;
1811 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1812 wps_build_credential(cred, &dummy);
1813 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1814
1815 wpabuf_put_be16(msg, ATTR_CRED);
1816 wpabuf_put_be16(msg, wpabuf_len(cred));
1817 wpabuf_put_buf(msg, cred);
1818
1819 wpabuf_free(cred);
1820 }
1821 #endif /* CONFIG_WPS_TESTING */
1822
1823 cred = wpabuf_alloc(200);
1824 if (cred == NULL)
1825 return -1;
1826
1827 if (wps_build_credential(cred, &wps->cred)) {
1828 wpabuf_clear_free(cred);
1829 return -1;
1830 }
1831
1832 wpabuf_put_be16(msg, ATTR_CRED);
1833 wpabuf_put_be16(msg, wpabuf_len(cred));
1834 wpabuf_put_buf(msg, cred);
1835 wpabuf_clear_free(cred);
1836
1837 skip_cred_build:
1838 if (wps->wps->registrar->extra_cred) {
1839 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1840 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1841 }
1842
1843 return 0;
1844 }
1845
1846
wps_build_ap_settings(struct wps_data * wps,struct wpabuf * msg)1847 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1848 {
1849 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1850
1851 if (wps_build_credential(msg, &wps->cred))
1852 return -1;
1853
1854 return 0;
1855 }
1856
1857
wps_build_ap_cred(struct wps_data * wps)1858 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1859 {
1860 struct wpabuf *msg, *plain;
1861
1862 msg = wpabuf_alloc(1000);
1863 if (msg == NULL)
1864 return NULL;
1865
1866 plain = wpabuf_alloc(200);
1867 if (plain == NULL) {
1868 wpabuf_free(msg);
1869 return NULL;
1870 }
1871
1872 if (wps_build_ap_settings(wps, plain)) {
1873 wpabuf_clear_free(plain);
1874 wpabuf_free(msg);
1875 return NULL;
1876 }
1877
1878 wpabuf_put_be16(msg, ATTR_CRED);
1879 wpabuf_put_be16(msg, wpabuf_len(plain));
1880 wpabuf_put_buf(msg, plain);
1881 wpabuf_clear_free(plain);
1882
1883 return msg;
1884 }
1885
1886
wps_build_m2(struct wps_data * wps)1887 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1888 {
1889 struct wpabuf *msg;
1890 int config_in_m2 = 0;
1891
1892 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1893 return NULL;
1894 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1895 wps->nonce_r, WPS_NONCE_LEN);
1896 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1897
1898 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1899 msg = wpabuf_alloc(1000);
1900 if (msg == NULL)
1901 return NULL;
1902
1903 if (wps_build_version(msg) ||
1904 wps_build_msg_type(msg, WPS_M2) ||
1905 wps_build_enrollee_nonce(wps, msg) ||
1906 wps_build_registrar_nonce(wps, msg) ||
1907 wps_build_uuid_r(wps, msg) ||
1908 wps_build_public_key(wps, msg) ||
1909 wps_derive_keys(wps) ||
1910 wps_build_auth_type_flags(wps, msg) ||
1911 wps_build_encr_type_flags(wps, msg) ||
1912 wps_build_conn_type_flags(wps, msg) ||
1913 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1914 wps_build_device_attrs(&wps->wps->dev, msg) ||
1915 wps_build_rf_bands(&wps->wps->dev, msg,
1916 wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1917 wps_build_assoc_state(wps, msg) ||
1918 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1919 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1920 wps_build_os_version(&wps->wps->dev, msg) ||
1921 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) {
1922 wpabuf_free(msg);
1923 return NULL;
1924 }
1925
1926 #ifdef CONFIG_WPS_NFC
1927 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1928 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1929 /*
1930 * Use abbreviated handshake since public key hash allowed
1931 * Enrollee to validate our public key similarly to how Enrollee
1932 * public key was validated. There is no need to validate Device
1933 * Password in this case.
1934 */
1935 struct wpabuf *plain = wpabuf_alloc(500);
1936 if (plain == NULL ||
1937 wps_build_cred(wps, plain) ||
1938 wps_build_key_wrap_auth(wps, plain) ||
1939 wps_build_encr_settings(wps, msg, plain)) {
1940 wpabuf_free(msg);
1941 wpabuf_clear_free(plain);
1942 return NULL;
1943 }
1944 wpabuf_clear_free(plain);
1945 config_in_m2 = 1;
1946 }
1947 #endif /* CONFIG_WPS_NFC */
1948
1949 if (wps_build_authenticator(wps, msg)) {
1950 wpabuf_free(msg);
1951 return NULL;
1952 }
1953
1954 wps->int_reg = 1;
1955 wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1956 return msg;
1957 }
1958
1959
wps_build_m2d(struct wps_data * wps)1960 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1961 {
1962 struct wpabuf *msg;
1963 u16 err = wps->config_error;
1964
1965 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1966 msg = wpabuf_alloc(1000);
1967 if (msg == NULL)
1968 return NULL;
1969
1970 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1971 err == WPS_CFG_NO_ERROR)
1972 err = WPS_CFG_SETUP_LOCKED;
1973
1974 if (wps_build_version(msg) ||
1975 wps_build_msg_type(msg, WPS_M2D) ||
1976 wps_build_enrollee_nonce(wps, msg) ||
1977 wps_build_registrar_nonce(wps, msg) ||
1978 wps_build_uuid_r(wps, msg) ||
1979 wps_build_auth_type_flags(wps, msg) ||
1980 wps_build_encr_type_flags(wps, msg) ||
1981 wps_build_conn_type_flags(wps, msg) ||
1982 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1983 wps_build_device_attrs(&wps->wps->dev, msg) ||
1984 wps_build_rf_bands(&wps->wps->dev, msg,
1985 wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1986 wps_build_assoc_state(wps, msg) ||
1987 wps_build_config_error(msg, err) ||
1988 wps_build_os_version(&wps->wps->dev, msg) ||
1989 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) {
1990 wpabuf_free(msg);
1991 return NULL;
1992 }
1993
1994 wps->state = RECV_M2D_ACK;
1995 return msg;
1996 }
1997
1998
wps_build_m4(struct wps_data * wps)1999 static struct wpabuf * wps_build_m4(struct wps_data *wps)
2000 {
2001 struct wpabuf *msg, *plain;
2002
2003 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
2004
2005 if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0)
2006 return NULL;
2007
2008 plain = wpabuf_alloc(200);
2009 if (plain == NULL)
2010 return NULL;
2011
2012 msg = wpabuf_alloc(1000);
2013 if (msg == NULL) {
2014 wpabuf_free(plain);
2015 return NULL;
2016 }
2017
2018 if (wps_build_version(msg) ||
2019 wps_build_msg_type(msg, WPS_M4) ||
2020 wps_build_enrollee_nonce(wps, msg) ||
2021 wps_build_r_hash(wps, msg) ||
2022 wps_build_r_snonce1(wps, plain) ||
2023 wps_build_key_wrap_auth(wps, plain) ||
2024 wps_build_encr_settings(wps, msg, plain) ||
2025 wps_build_wfa_ext(msg, 0, NULL, 0, 0) ||
2026 wps_build_authenticator(wps, msg)) {
2027 wpabuf_clear_free(plain);
2028 wpabuf_free(msg);
2029 return NULL;
2030 }
2031 wpabuf_clear_free(plain);
2032
2033 wps->state = RECV_M5;
2034 return msg;
2035 }
2036
2037
wps_build_m6(struct wps_data * wps)2038 static struct wpabuf * wps_build_m6(struct wps_data *wps)
2039 {
2040 struct wpabuf *msg, *plain;
2041
2042 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
2043
2044 plain = wpabuf_alloc(200);
2045 if (plain == NULL)
2046 return NULL;
2047
2048 msg = wpabuf_alloc(1000);
2049 if (msg == NULL) {
2050 wpabuf_free(plain);
2051 return NULL;
2052 }
2053
2054 if (wps_build_version(msg) ||
2055 wps_build_msg_type(msg, WPS_M6) ||
2056 wps_build_enrollee_nonce(wps, msg) ||
2057 wps_build_r_snonce2(wps, plain) ||
2058 wps_build_key_wrap_auth(wps, plain) ||
2059 wps_build_encr_settings(wps, msg, plain) ||
2060 wps_build_wfa_ext(msg, 0, NULL, 0, 0) ||
2061 wps_build_authenticator(wps, msg)) {
2062 wpabuf_clear_free(plain);
2063 wpabuf_free(msg);
2064 return NULL;
2065 }
2066 wpabuf_clear_free(plain);
2067
2068 wps->wps_pin_revealed = 1;
2069 wps->state = RECV_M7;
2070 return msg;
2071 }
2072
2073
wps_build_m8(struct wps_data * wps)2074 static struct wpabuf * wps_build_m8(struct wps_data *wps)
2075 {
2076 struct wpabuf *msg, *plain;
2077
2078 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
2079
2080 plain = wpabuf_alloc(500);
2081 if (plain == NULL)
2082 return NULL;
2083
2084 msg = wpabuf_alloc(1000);
2085 if (msg == NULL) {
2086 wpabuf_free(plain);
2087 return NULL;
2088 }
2089
2090 if (wps_build_version(msg) ||
2091 wps_build_msg_type(msg, WPS_M8) ||
2092 wps_build_enrollee_nonce(wps, msg) ||
2093 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
2094 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
2095 wps_build_key_wrap_auth(wps, plain) ||
2096 wps_build_encr_settings(wps, msg, plain) ||
2097 wps_build_wfa_ext(msg, 0, NULL, 0, 0) ||
2098 wps_build_authenticator(wps, msg)) {
2099 wpabuf_clear_free(plain);
2100 wpabuf_clear_free(msg);
2101 return NULL;
2102 }
2103 wpabuf_clear_free(plain);
2104
2105 wps->state = RECV_DONE;
2106 return msg;
2107 }
2108
2109
wps_registrar_get_msg(struct wps_data * wps,enum wsc_op_code * op_code)2110 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2111 enum wsc_op_code *op_code)
2112 {
2113 struct wpabuf *msg;
2114
2115 #ifdef CONFIG_WPS_UPNP
2116 if (!wps->int_reg && wps->wps->wps_upnp) {
2117 struct upnp_pending_message *p, *prev = NULL;
2118 if (wps->ext_reg > 1)
2119 wps_registrar_free_pending_m2(wps->wps);
2120 p = wps->wps->upnp_msgs;
2121 /* TODO: check pending message MAC address */
2122 while (p && p->next) {
2123 prev = p;
2124 p = p->next;
2125 }
2126 if (p) {
2127 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2128 "UPnP");
2129 if (prev)
2130 prev->next = NULL;
2131 else
2132 wps->wps->upnp_msgs = NULL;
2133 msg = p->msg;
2134 switch (p->type) {
2135 case WPS_WSC_ACK:
2136 *op_code = WSC_ACK;
2137 break;
2138 case WPS_WSC_NACK:
2139 *op_code = WSC_NACK;
2140 break;
2141 default:
2142 *op_code = WSC_MSG;
2143 break;
2144 }
2145 os_free(p);
2146 if (wps->ext_reg == 0)
2147 wps->ext_reg = 1;
2148 return msg;
2149 }
2150 }
2151 if (wps->ext_reg) {
2152 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2153 "pending message available");
2154 return NULL;
2155 }
2156 #endif /* CONFIG_WPS_UPNP */
2157
2158 switch (wps->state) {
2159 case SEND_M2:
2160 if (wps_get_dev_password(wps) < 0)
2161 msg = wps_build_m2d(wps);
2162 else
2163 msg = wps_build_m2(wps);
2164 *op_code = WSC_MSG;
2165 break;
2166 case SEND_M2D:
2167 msg = wps_build_m2d(wps);
2168 *op_code = WSC_MSG;
2169 break;
2170 case SEND_M4:
2171 msg = wps_build_m4(wps);
2172 *op_code = WSC_MSG;
2173 break;
2174 case SEND_M6:
2175 msg = wps_build_m6(wps);
2176 *op_code = WSC_MSG;
2177 break;
2178 case SEND_M8:
2179 msg = wps_build_m8(wps);
2180 *op_code = WSC_MSG;
2181 break;
2182 case RECV_DONE:
2183 msg = wps_build_wsc_ack(wps);
2184 *op_code = WSC_ACK;
2185 break;
2186 case SEND_WSC_NACK:
2187 msg = wps_build_wsc_nack(wps);
2188 *op_code = WSC_NACK;
2189 break;
2190 default:
2191 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2192 "a message", wps->state);
2193 msg = NULL;
2194 break;
2195 }
2196
2197 if (*op_code == WSC_MSG && msg) {
2198 /* Save a copy of the last message for Authenticator derivation
2199 */
2200 wpabuf_free(wps->last_msg);
2201 wps->last_msg = wpabuf_dup(msg);
2202 }
2203
2204 return msg;
2205 }
2206
2207
wps_process_enrollee_nonce(struct wps_data * wps,const u8 * e_nonce)2208 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2209 {
2210 if (e_nonce == NULL) {
2211 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2212 return -1;
2213 }
2214
2215 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2216 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2217 wps->nonce_e, WPS_NONCE_LEN);
2218
2219 return 0;
2220 }
2221
2222
wps_process_registrar_nonce(struct wps_data * wps,const u8 * r_nonce)2223 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2224 {
2225 if (r_nonce == NULL) {
2226 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2227 return -1;
2228 }
2229
2230 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2231 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2232 return -1;
2233 }
2234
2235 return 0;
2236 }
2237
2238
wps_process_uuid_e(struct wps_data * wps,const u8 * uuid_e)2239 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2240 {
2241 if (uuid_e == NULL) {
2242 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2243 return -1;
2244 }
2245
2246 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2247 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2248
2249 return 0;
2250 }
2251
2252
wps_process_dev_password_id(struct wps_data * wps,const u8 * pw_id)2253 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2254 {
2255 if (pw_id == NULL) {
2256 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2257 return -1;
2258 }
2259
2260 wps->dev_pw_id = WPA_GET_BE16(pw_id);
2261 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2262
2263 return 0;
2264 }
2265
2266
wps_process_e_hash1(struct wps_data * wps,const u8 * e_hash1)2267 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2268 {
2269 if (e_hash1 == NULL) {
2270 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2271 return -1;
2272 }
2273
2274 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2275 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2276
2277 return 0;
2278 }
2279
2280
wps_process_e_hash2(struct wps_data * wps,const u8 * e_hash2)2281 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2282 {
2283 if (e_hash2 == NULL) {
2284 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2285 return -1;
2286 }
2287
2288 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2289 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2290
2291 return 0;
2292 }
2293
2294
wps_process_e_snonce1(struct wps_data * wps,const u8 * e_snonce1)2295 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2296 {
2297 u8 hash[SHA256_MAC_LEN];
2298 const u8 *addr[4];
2299 size_t len[4];
2300
2301 if (e_snonce1 == NULL) {
2302 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2303 return -1;
2304 }
2305
2306 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2307 WPS_SECRET_NONCE_LEN);
2308
2309 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2310 addr[0] = e_snonce1;
2311 len[0] = WPS_SECRET_NONCE_LEN;
2312 addr[1] = wps->psk1;
2313 len[1] = WPS_PSK_LEN;
2314 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2315 len[2] = wpabuf_len(wps->dh_pubkey_e);
2316 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2317 len[3] = wpabuf_len(wps->dh_pubkey_r);
2318 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2319
2320 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2321 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2322 "not match with the pre-committed value");
2323 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2324 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2325 return -1;
2326 }
2327
2328 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2329 "half of the device password");
2330
2331 return 0;
2332 }
2333
2334
wps_process_e_snonce2(struct wps_data * wps,const u8 * e_snonce2)2335 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2336 {
2337 u8 hash[SHA256_MAC_LEN];
2338 const u8 *addr[4];
2339 size_t len[4];
2340
2341 if (e_snonce2 == NULL) {
2342 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2343 return -1;
2344 }
2345
2346 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2347 WPS_SECRET_NONCE_LEN);
2348
2349 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2350 addr[0] = e_snonce2;
2351 len[0] = WPS_SECRET_NONCE_LEN;
2352 addr[1] = wps->psk2;
2353 len[1] = WPS_PSK_LEN;
2354 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2355 len[2] = wpabuf_len(wps->dh_pubkey_e);
2356 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2357 len[3] = wpabuf_len(wps->dh_pubkey_r);
2358 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2359
2360 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2361 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2362 "not match with the pre-committed value");
2363 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2364 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2365 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2366 return -1;
2367 }
2368
2369 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2370 "half of the device password");
2371 wps->wps_pin_revealed = 0;
2372 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2373
2374 /*
2375 * In case wildcard PIN is used and WPS handshake succeeds in the first
2376 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2377 * sure the PIN gets invalidated here.
2378 */
2379 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2380
2381 return 0;
2382 }
2383
2384
wps_process_mac_addr(struct wps_data * wps,const u8 * mac_addr)2385 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2386 {
2387 if (mac_addr == NULL) {
2388 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2389 return -1;
2390 }
2391
2392 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2393 MAC2STR(mac_addr));
2394 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2395 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2396
2397 return 0;
2398 }
2399
2400
wps_process_pubkey(struct wps_data * wps,const u8 * pk,size_t pk_len)2401 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2402 size_t pk_len)
2403 {
2404 if (pk == NULL || pk_len == 0) {
2405 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2406 return -1;
2407 }
2408
2409 wpabuf_free(wps->dh_pubkey_e);
2410 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2411 if (wps->dh_pubkey_e == NULL)
2412 return -1;
2413
2414 return 0;
2415 }
2416
2417
wps_process_auth_type_flags(struct wps_data * wps,const u8 * auth)2418 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2419 {
2420 u16 auth_types;
2421
2422 if (auth == NULL) {
2423 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2424 "received");
2425 return -1;
2426 }
2427
2428 auth_types = WPA_GET_BE16(auth);
2429
2430 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2431 auth_types);
2432 #ifdef WPS_WORKAROUNDS
2433 /*
2434 * Some deployed implementations seem to advertise incorrect information
2435 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but
2436 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to
2437 * avoid issues with building Credentials that do not use the strongest
2438 * actually supported authentication option (that device does support
2439 * WPA2PSK even when it does not claim it here).
2440 */
2441 if ((auth_types &
2442 (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) ==
2443 (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) {
2444 wpa_printf(MSG_DEBUG,
2445 "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support");
2446 auth_types |= WPS_AUTH_WPA2PSK;
2447 }
2448 #endif /* WPS_WORKAROUNDS */
2449 wps->auth_type = wps->wps->auth_types & auth_types;
2450 if (wps->auth_type == 0) {
2451 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2452 "authentication types (own 0x%x Enrollee 0x%x)",
2453 wps->wps->auth_types, auth_types);
2454 #ifdef WPS_WORKAROUNDS
2455 /*
2456 * Some deployed implementations seem to advertise incorrect
2457 * information in this attribute. For example, Linksys WRT350N
2458 * seems to have a byteorder bug that breaks this negotiation.
2459 * In order to interoperate with existing implementations,
2460 * assume that the Enrollee supports everything we do.
2461 */
2462 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2463 "does not advertise supported authentication types "
2464 "correctly");
2465 wps->auth_type = wps->wps->auth_types;
2466 #else /* WPS_WORKAROUNDS */
2467 return -1;
2468 #endif /* WPS_WORKAROUNDS */
2469 }
2470
2471 return 0;
2472 }
2473
2474
wps_process_encr_type_flags(struct wps_data * wps,const u8 * encr)2475 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2476 {
2477 u16 encr_types;
2478
2479 if (encr == NULL) {
2480 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2481 "received");
2482 return -1;
2483 }
2484
2485 encr_types = WPA_GET_BE16(encr);
2486
2487 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2488 encr_types);
2489 wps->encr_type = wps->wps->encr_types & encr_types;
2490 if (wps->encr_type == 0) {
2491 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2492 "encryption types (own 0x%x Enrollee 0x%x)",
2493 wps->wps->encr_types, encr_types);
2494 #ifdef WPS_WORKAROUNDS
2495 /*
2496 * Some deployed implementations seem to advertise incorrect
2497 * information in this attribute. For example, Linksys WRT350N
2498 * seems to have a byteorder bug that breaks this negotiation.
2499 * In order to interoperate with existing implementations,
2500 * assume that the Enrollee supports everything we do.
2501 */
2502 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2503 "does not advertise supported encryption types "
2504 "correctly");
2505 wps->encr_type = wps->wps->encr_types;
2506 #else /* WPS_WORKAROUNDS */
2507 return -1;
2508 #endif /* WPS_WORKAROUNDS */
2509 }
2510
2511 return 0;
2512 }
2513
2514
wps_process_conn_type_flags(struct wps_data * wps,const u8 * conn)2515 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2516 {
2517 if (conn == NULL) {
2518 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2519 "received");
2520 return -1;
2521 }
2522
2523 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2524 *conn);
2525
2526 return 0;
2527 }
2528
2529
wps_process_config_methods(struct wps_data * wps,const u8 * methods)2530 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2531 {
2532 u16 m;
2533
2534 if (methods == NULL) {
2535 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2536 return -1;
2537 }
2538
2539 m = WPA_GET_BE16(methods);
2540
2541 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2542 "%s%s%s%s%s%s%s%s%s", m,
2543 m & WPS_CONFIG_USBA ? " [USBA]" : "",
2544 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2545 m & WPS_CONFIG_LABEL ? " [Label]" : "",
2546 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2547 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2548 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2549 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2550 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2551 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2552
2553 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2554 /*
2555 * The Enrollee does not have a display so it is unlikely to be
2556 * able to show the passphrase to a user and as such, could
2557 * benefit from receiving PSK to reduce key derivation time.
2558 */
2559 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2560 "Enrollee not supporting display");
2561 wps->use_psk_key = 1;
2562 }
2563
2564 return 0;
2565 }
2566
2567
wps_process_wps_state(struct wps_data * wps,const u8 * state)2568 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2569 {
2570 if (state == NULL) {
2571 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2572 "received");
2573 return -1;
2574 }
2575
2576 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2577 *state);
2578
2579 return 0;
2580 }
2581
2582
wps_process_assoc_state(struct wps_data * wps,const u8 * assoc)2583 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2584 {
2585 u16 a;
2586
2587 if (assoc == NULL) {
2588 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2589 return -1;
2590 }
2591
2592 a = WPA_GET_BE16(assoc);
2593 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2594
2595 return 0;
2596 }
2597
2598
wps_process_config_error(struct wps_data * wps,const u8 * err)2599 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2600 {
2601 u16 e;
2602
2603 if (err == NULL) {
2604 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2605 return -1;
2606 }
2607
2608 e = WPA_GET_BE16(err);
2609 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2610
2611 return 0;
2612 }
2613
2614
wps_registrar_p2p_dev_addr_match(struct wps_data * wps)2615 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2616 {
2617 #ifdef CONFIG_P2P
2618 struct wps_registrar *reg = wps->wps->registrar;
2619
2620 if (is_zero_ether_addr(reg->p2p_dev_addr))
2621 return 1; /* no filtering in use */
2622
2623 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2624 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2625 "filtering for PBC: expected " MACSTR " was "
2626 MACSTR " - indicate PBC session overlap",
2627 MAC2STR(reg->p2p_dev_addr),
2628 MAC2STR(wps->p2p_dev_addr));
2629 return 0;
2630 }
2631 #endif /* CONFIG_P2P */
2632 return 1;
2633 }
2634
2635
wps_registrar_skip_overlap(struct wps_data * wps)2636 static int wps_registrar_skip_overlap(struct wps_data *wps)
2637 {
2638 #ifdef CONFIG_P2P
2639 struct wps_registrar *reg = wps->wps->registrar;
2640
2641 if (is_zero_ether_addr(reg->p2p_dev_addr))
2642 return 0; /* no specific Enrollee selected */
2643
2644 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2645 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2646 "Enrollee match");
2647 return 1;
2648 }
2649 #endif /* CONFIG_P2P */
2650 return 0;
2651 }
2652
2653
wps_process_m1(struct wps_data * wps,struct wps_parse_attr * attr)2654 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2655 struct wps_parse_attr *attr)
2656 {
2657 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2658
2659 if (wps->state != RECV_M1) {
2660 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2661 "receiving M1", wps->state);
2662 return WPS_FAILURE;
2663 }
2664
2665 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2666 wps_process_mac_addr(wps, attr->mac_addr) ||
2667 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2668 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2669 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2670 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2671 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2672 wps_process_config_methods(wps, attr->config_methods) ||
2673 wps_process_wps_state(wps, attr->wps_state) ||
2674 wps_process_device_attrs(&wps->peer_dev, attr) ||
2675 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2676 wps_process_assoc_state(wps, attr->assoc_state) ||
2677 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2678 wps_process_config_error(wps, attr->config_error) ||
2679 wps_process_os_version(&wps->peer_dev, attr->os_version))
2680 return WPS_FAILURE;
2681
2682 if (wps->dev_pw_id < 0x10 &&
2683 wps->dev_pw_id != DEV_PW_DEFAULT &&
2684 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT &&
2685 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2686 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2687 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2688 #ifdef CONFIG_WPS_NFC
2689 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2690 #endif /* CONFIG_WPS_NFC */
2691 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2692 !wps->wps->registrar->pbc)) {
2693 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2694 wps->dev_pw_id);
2695 wps->state = SEND_M2D;
2696 return WPS_CONTINUE;
2697 }
2698
2699 #ifdef CONFIG_WPS_NFC
2700 if (wps->dev_pw_id >= 0x10 ||
2701 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2702 struct wps_nfc_pw_token *token;
2703 const u8 *addr[1];
2704 u8 hash[WPS_HASH_LEN];
2705
2706 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2707 wps->dev_pw_id, wps->wps, wps->wps->registrar);
2708 token = wps_get_nfc_pw_token(
2709 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2710 if (token && token->peer_pk_hash_known) {
2711 size_t len;
2712
2713 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2714 "Password Token");
2715 dl_list_del(&token->list);
2716 wps->nfc_pw_token = token;
2717
2718 addr[0] = attr->public_key;
2719 len = attr->public_key_len;
2720 sha256_vector(1, addr, &len, hash);
2721 if (os_memcmp_const(hash,
2722 wps->nfc_pw_token->pubkey_hash,
2723 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2724 wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2725 "mismatch");
2726 wps->state = SEND_M2D;
2727 wps->config_error =
2728 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2729 return WPS_CONTINUE;
2730 }
2731 } else if (token) {
2732 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2733 "Password Token (no peer PK hash)");
2734 wps->nfc_pw_token = token;
2735 } else if (wps->dev_pw_id >= 0x10 &&
2736 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2737 wps->wps->ap_nfc_dev_pw) {
2738 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2739 }
2740 }
2741 #endif /* CONFIG_WPS_NFC */
2742
2743 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2744 if ((wps->wps->registrar->force_pbc_overlap ||
2745 wps_registrar_pbc_overlap(wps->wps->registrar,
2746 wps->mac_addr_e, wps->uuid_e) ||
2747 !wps_registrar_p2p_dev_addr_match(wps)) &&
2748 !wps_registrar_skip_overlap(wps)) {
2749 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2750 "negotiation");
2751 wps->state = SEND_M2D;
2752 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2753 wps_pbc_overlap_event(wps->wps);
2754 wps_fail_event(wps->wps, WPS_M1,
2755 WPS_CFG_MULTIPLE_PBC_DETECTED,
2756 WPS_EI_NO_ERROR, wps->mac_addr_e);
2757 wps->wps->registrar->force_pbc_overlap = 1;
2758 return WPS_CONTINUE;
2759 }
2760 wps_registrar_add_pbc_session(wps->wps->registrar,
2761 wps->mac_addr_e, wps->uuid_e);
2762 wps->pbc = 1;
2763 }
2764
2765 #ifdef WPS_WORKAROUNDS
2766 /*
2767 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2768 * passphrase format. To avoid interop issues, force PSK format to be
2769 * used.
2770 */
2771 if (!wps->use_psk_key &&
2772 wps->peer_dev.manufacturer &&
2773 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2774 wps->peer_dev.model_name &&
2775 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2776 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2777 "PSK format");
2778 wps->use_psk_key = 1;
2779 }
2780 #endif /* WPS_WORKAROUNDS */
2781 wps_process_vendor_ext_m1(&wps->peer_dev, attr->multi_ap_ext);
2782
2783 wps->state = SEND_M2;
2784 return WPS_CONTINUE;
2785 }
2786
2787
wps_process_m3(struct wps_data * wps,const struct wpabuf * msg,struct wps_parse_attr * attr)2788 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2789 const struct wpabuf *msg,
2790 struct wps_parse_attr *attr)
2791 {
2792 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2793
2794 if (wps->state != RECV_M3) {
2795 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2796 "receiving M3", wps->state);
2797 wps->state = SEND_WSC_NACK;
2798 return WPS_CONTINUE;
2799 }
2800
2801 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2802 !wps_registrar_skip_overlap(wps)) {
2803 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2804 "session overlap");
2805 wps->state = SEND_WSC_NACK;
2806 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2807 return WPS_CONTINUE;
2808 }
2809
2810 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2811 wps_process_authenticator(wps, attr->authenticator, msg) ||
2812 wps_process_e_hash1(wps, attr->e_hash1) ||
2813 wps_process_e_hash2(wps, attr->e_hash2)) {
2814 wps->state = SEND_WSC_NACK;
2815 return WPS_CONTINUE;
2816 }
2817
2818 wps->state = SEND_M4;
2819 return WPS_CONTINUE;
2820 }
2821
2822
wps_process_m5(struct wps_data * wps,const struct wpabuf * msg,struct wps_parse_attr * attr)2823 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2824 const struct wpabuf *msg,
2825 struct wps_parse_attr *attr)
2826 {
2827 struct wpabuf *decrypted;
2828 struct wps_parse_attr eattr;
2829
2830 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2831
2832 if (wps->state != RECV_M5) {
2833 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2834 "receiving M5", wps->state);
2835 wps->state = SEND_WSC_NACK;
2836 return WPS_CONTINUE;
2837 }
2838
2839 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2840 !wps_registrar_skip_overlap(wps)) {
2841 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2842 "session overlap");
2843 wps->state = SEND_WSC_NACK;
2844 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2845 return WPS_CONTINUE;
2846 }
2847
2848 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2849 wps_process_authenticator(wps, attr->authenticator, msg)) {
2850 wps->state = SEND_WSC_NACK;
2851 return WPS_CONTINUE;
2852 }
2853
2854 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2855 attr->encr_settings_len);
2856 if (decrypted == NULL) {
2857 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2858 "Settings attribute");
2859 wps->state = SEND_WSC_NACK;
2860 return WPS_CONTINUE;
2861 }
2862
2863 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2864 wpabuf_clear_free(decrypted);
2865 wps->state = SEND_WSC_NACK;
2866 return WPS_CONTINUE;
2867 }
2868
2869 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2870 "attribute");
2871 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2872 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2873 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2874 wpabuf_clear_free(decrypted);
2875 wps->state = SEND_WSC_NACK;
2876 return WPS_CONTINUE;
2877 }
2878 wpabuf_clear_free(decrypted);
2879
2880 wps->state = SEND_M6;
2881 return WPS_CONTINUE;
2882 }
2883
2884
wps_sta_cred_cb(struct wps_data * wps)2885 static void wps_sta_cred_cb(struct wps_data *wps)
2886 {
2887 /*
2888 * Update credential to only include a single authentication and
2889 * encryption type in case the AP configuration includes more than one
2890 * option.
2891 */
2892 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2893 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2894 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2895 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2896 if (wps->cred.encr_type & WPS_ENCR_AES)
2897 wps->cred.encr_type = WPS_ENCR_AES;
2898 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2899 wps->cred.encr_type = WPS_ENCR_TKIP;
2900 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2901 "AP configuration");
2902 if (wps->wps->cred_cb)
2903 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2904 }
2905
2906
wps_cred_update(struct wps_credential * dst,struct wps_credential * src)2907 static void wps_cred_update(struct wps_credential *dst,
2908 struct wps_credential *src)
2909 {
2910 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2911 dst->ssid_len = src->ssid_len;
2912 dst->auth_type = src->auth_type;
2913 dst->encr_type = src->encr_type;
2914 dst->key_idx = src->key_idx;
2915 os_memcpy(dst->key, src->key, sizeof(dst->key));
2916 dst->key_len = src->key_len;
2917 }
2918
2919
wps_process_ap_settings_r(struct wps_data * wps,struct wps_parse_attr * attr)2920 static int wps_process_ap_settings_r(struct wps_data *wps,
2921 struct wps_parse_attr *attr)
2922 {
2923 struct wpabuf *msg;
2924
2925 if (wps->wps->ap || wps->er)
2926 return 0;
2927
2928 /* AP Settings Attributes in M7 when Enrollee is an AP */
2929 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2930 return -1;
2931
2932 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2933
2934 if (wps->new_ap_settings) {
2935 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2936 "new settings");
2937 wps_cred_update(&wps->cred, wps->new_ap_settings);
2938 return 0;
2939 } else {
2940 /*
2941 * Use the AP PIN only to receive the current AP settings, not
2942 * to reconfigure the AP.
2943 */
2944
2945 /*
2946 * Clear selected registrar here since we do not get to
2947 * WSC_Done in this protocol run.
2948 */
2949 wps_registrar_pin_completed(wps->wps->registrar);
2950
2951 msg = wps_build_ap_cred(wps);
2952 if (msg == NULL)
2953 return -1;
2954 wps->cred.cred_attr = wpabuf_head(msg);
2955 wps->cred.cred_attr_len = wpabuf_len(msg);
2956
2957 if (wps->ap_settings_cb) {
2958 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2959 &wps->cred);
2960 wpabuf_free(msg);
2961 return 1;
2962 }
2963 wps_sta_cred_cb(wps);
2964
2965 wps->cred.cred_attr = NULL;
2966 wps->cred.cred_attr_len = 0;
2967 wpabuf_free(msg);
2968
2969 return 1;
2970 }
2971 }
2972
2973
wps_process_m7(struct wps_data * wps,const struct wpabuf * msg,struct wps_parse_attr * attr)2974 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2975 const struct wpabuf *msg,
2976 struct wps_parse_attr *attr)
2977 {
2978 struct wpabuf *decrypted;
2979 struct wps_parse_attr eattr;
2980
2981 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2982
2983 if (wps->state != RECV_M7) {
2984 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2985 "receiving M7", wps->state);
2986 wps->state = SEND_WSC_NACK;
2987 return WPS_CONTINUE;
2988 }
2989
2990 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2991 !wps_registrar_skip_overlap(wps)) {
2992 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2993 "session overlap");
2994 wps->state = SEND_WSC_NACK;
2995 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2996 return WPS_CONTINUE;
2997 }
2998
2999 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
3000 wps_process_authenticator(wps, attr->authenticator, msg)) {
3001 wps->state = SEND_WSC_NACK;
3002 return WPS_CONTINUE;
3003 }
3004
3005 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
3006 attr->encr_settings_len);
3007 if (decrypted == NULL) {
3008 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
3009 "Settings attribute");
3010 wps->state = SEND_WSC_NACK;
3011 return WPS_CONTINUE;
3012 }
3013
3014 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
3015 attr->version2 != NULL) < 0) {
3016 wpabuf_clear_free(decrypted);
3017 wps->state = SEND_WSC_NACK;
3018 return WPS_CONTINUE;
3019 }
3020
3021 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
3022 "attribute");
3023 if (wps_parse_msg(decrypted, &eattr) < 0 ||
3024 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
3025 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
3026 wps_process_ap_settings_r(wps, &eattr)) {
3027 wpabuf_clear_free(decrypted);
3028 wps->state = SEND_WSC_NACK;
3029 return WPS_CONTINUE;
3030 }
3031
3032 wpabuf_clear_free(decrypted);
3033
3034 wps->state = SEND_M8;
3035 return WPS_CONTINUE;
3036 }
3037
3038
wps_process_wsc_msg(struct wps_data * wps,const struct wpabuf * msg)3039 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
3040 const struct wpabuf *msg)
3041 {
3042 struct wps_parse_attr attr;
3043 enum wps_process_res ret = WPS_CONTINUE;
3044
3045 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
3046
3047 if (wps_parse_msg(msg, &attr) < 0)
3048 return WPS_FAILURE;
3049
3050 if (attr.msg_type == NULL) {
3051 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3052 wps->state = SEND_WSC_NACK;
3053 return WPS_CONTINUE;
3054 }
3055
3056 if (*attr.msg_type != WPS_M1 &&
3057 (attr.registrar_nonce == NULL ||
3058 os_memcmp(wps->nonce_r, attr.registrar_nonce,
3059 WPS_NONCE_LEN) != 0)) {
3060 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3061 return WPS_FAILURE;
3062 }
3063
3064 switch (*attr.msg_type) {
3065 case WPS_M1:
3066 if (wps_validate_m1(msg) < 0)
3067 return WPS_FAILURE;
3068 #ifdef CONFIG_WPS_UPNP
3069 if (wps->wps->wps_upnp && attr.mac_addr) {
3070 /* Remove old pending messages when starting new run */
3071 wps_free_pending_msgs(wps->wps->upnp_msgs);
3072 wps->wps->upnp_msgs = NULL;
3073
3074 upnp_wps_device_send_wlan_event(
3075 wps->wps->wps_upnp, attr.mac_addr,
3076 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
3077 }
3078 #endif /* CONFIG_WPS_UPNP */
3079 ret = wps_process_m1(wps, &attr);
3080 break;
3081 case WPS_M3:
3082 if (wps_validate_m3(msg) < 0)
3083 return WPS_FAILURE;
3084 ret = wps_process_m3(wps, msg, &attr);
3085 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3086 wps_fail_event(wps->wps, WPS_M3, wps->config_error,
3087 wps->error_indication, wps->mac_addr_e);
3088 break;
3089 case WPS_M5:
3090 if (wps_validate_m5(msg) < 0)
3091 return WPS_FAILURE;
3092 ret = wps_process_m5(wps, msg, &attr);
3093 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3094 wps_fail_event(wps->wps, WPS_M5, wps->config_error,
3095 wps->error_indication, wps->mac_addr_e);
3096 break;
3097 case WPS_M7:
3098 if (wps_validate_m7(msg) < 0)
3099 return WPS_FAILURE;
3100 ret = wps_process_m7(wps, msg, &attr);
3101 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3102 wps_fail_event(wps->wps, WPS_M7, wps->config_error,
3103 wps->error_indication, wps->mac_addr_e);
3104 break;
3105 default:
3106 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
3107 *attr.msg_type);
3108 return WPS_FAILURE;
3109 }
3110
3111 if (ret == WPS_CONTINUE) {
3112 /* Save a copy of the last message for Authenticator derivation
3113 */
3114 wpabuf_free(wps->last_msg);
3115 wps->last_msg = wpabuf_dup(msg);
3116 }
3117
3118 return ret;
3119 }
3120
3121
wps_process_wsc_ack(struct wps_data * wps,const struct wpabuf * msg)3122 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
3123 const struct wpabuf *msg)
3124 {
3125 struct wps_parse_attr attr;
3126
3127 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
3128
3129 if (wps_parse_msg(msg, &attr) < 0)
3130 return WPS_FAILURE;
3131
3132 if (attr.msg_type == NULL) {
3133 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3134 return WPS_FAILURE;
3135 }
3136
3137 if (*attr.msg_type != WPS_WSC_ACK) {
3138 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3139 *attr.msg_type);
3140 return WPS_FAILURE;
3141 }
3142
3143 #ifdef CONFIG_WPS_UPNP
3144 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3145 upnp_wps_subscribers(wps->wps->wps_upnp)) {
3146 if (wps->wps->upnp_msgs)
3147 return WPS_CONTINUE;
3148 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3149 "external Registrar");
3150 return WPS_PENDING;
3151 }
3152 #endif /* CONFIG_WPS_UPNP */
3153
3154 if (attr.registrar_nonce == NULL ||
3155 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3156 {
3157 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3158 return WPS_FAILURE;
3159 }
3160
3161 if (attr.enrollee_nonce == NULL ||
3162 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3163 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3164 return WPS_FAILURE;
3165 }
3166
3167 if (wps->state == RECV_M2D_ACK) {
3168 #ifdef CONFIG_WPS_UPNP
3169 if (wps->wps->wps_upnp &&
3170 upnp_wps_subscribers(wps->wps->wps_upnp)) {
3171 if (wps->wps->upnp_msgs)
3172 return WPS_CONTINUE;
3173 if (wps->ext_reg == 0)
3174 wps->ext_reg = 1;
3175 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3176 "external Registrar");
3177 return WPS_PENDING;
3178 }
3179 #endif /* CONFIG_WPS_UPNP */
3180
3181 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3182 "terminate negotiation");
3183 }
3184
3185 return WPS_FAILURE;
3186 }
3187
3188
wps_process_wsc_nack(struct wps_data * wps,const struct wpabuf * msg)3189 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3190 const struct wpabuf *msg)
3191 {
3192 struct wps_parse_attr attr;
3193 int old_state;
3194 u16 config_error;
3195
3196 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3197
3198 old_state = wps->state;
3199 wps->state = SEND_WSC_NACK;
3200
3201 if (wps_parse_msg(msg, &attr) < 0)
3202 return WPS_FAILURE;
3203
3204 if (attr.msg_type == NULL) {
3205 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3206 return WPS_FAILURE;
3207 }
3208
3209 if (*attr.msg_type != WPS_WSC_NACK) {
3210 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3211 *attr.msg_type);
3212 return WPS_FAILURE;
3213 }
3214
3215 #ifdef CONFIG_WPS_UPNP
3216 if (wps->wps->wps_upnp && wps->ext_reg) {
3217 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3218 "Registrar terminated by the Enrollee");
3219 return WPS_FAILURE;
3220 }
3221 #endif /* CONFIG_WPS_UPNP */
3222
3223 if (attr.registrar_nonce == NULL ||
3224 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3225 {
3226 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3227 return WPS_FAILURE;
3228 }
3229
3230 if (attr.enrollee_nonce == NULL ||
3231 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3232 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3233 return WPS_FAILURE;
3234 }
3235
3236 if (attr.config_error == NULL) {
3237 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3238 "in WSC_NACK");
3239 return WPS_FAILURE;
3240 }
3241
3242 config_error = WPA_GET_BE16(attr.config_error);
3243 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3244 "Configuration Error %d", config_error);
3245
3246 switch (old_state) {
3247 case RECV_M3:
3248 wps_fail_event(wps->wps, WPS_M2, config_error,
3249 wps->error_indication, wps->mac_addr_e);
3250 break;
3251 case RECV_M5:
3252 wps_fail_event(wps->wps, WPS_M4, config_error,
3253 wps->error_indication, wps->mac_addr_e);
3254 break;
3255 case RECV_M7:
3256 wps_fail_event(wps->wps, WPS_M6, config_error,
3257 wps->error_indication, wps->mac_addr_e);
3258 break;
3259 case RECV_DONE:
3260 wps_fail_event(wps->wps, WPS_M8, config_error,
3261 wps->error_indication, wps->mac_addr_e);
3262 break;
3263 default:
3264 break;
3265 }
3266
3267 return WPS_FAILURE;
3268 }
3269
3270
wps_process_wsc_done(struct wps_data * wps,const struct wpabuf * msg)3271 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3272 const struct wpabuf *msg)
3273 {
3274 struct wps_parse_attr attr;
3275
3276 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3277
3278 if (wps->state != RECV_DONE &&
3279 (!wps->wps->wps_upnp || !wps->ext_reg)) {
3280 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3281 "receiving WSC_Done", wps->state);
3282 return WPS_FAILURE;
3283 }
3284
3285 if (wps_parse_msg(msg, &attr) < 0)
3286 return WPS_FAILURE;
3287
3288 if (attr.msg_type == NULL) {
3289 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3290 return WPS_FAILURE;
3291 }
3292
3293 if (*attr.msg_type != WPS_WSC_DONE) {
3294 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3295 *attr.msg_type);
3296 return WPS_FAILURE;
3297 }
3298
3299 #ifdef CONFIG_WPS_UPNP
3300 if (wps->wps->wps_upnp && wps->ext_reg) {
3301 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3302 "Registrar completed successfully");
3303 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3304 wps->uuid_e);
3305 return WPS_DONE;
3306 }
3307 #endif /* CONFIG_WPS_UPNP */
3308
3309 if (attr.registrar_nonce == NULL ||
3310 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3311 {
3312 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3313 return WPS_FAILURE;
3314 }
3315
3316 if (attr.enrollee_nonce == NULL ||
3317 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3318 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3319 return WPS_FAILURE;
3320 }
3321
3322 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3323 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3324 wps->uuid_e);
3325
3326 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3327 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3328 struct wps_credential cred;
3329
3330 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3331 "on first Enrollee connection");
3332
3333 os_memset(&cred, 0, sizeof(cred));
3334 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3335 cred.ssid_len = wps->wps->ssid_len;
3336 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) {
3337 cred.auth_type = WPS_AUTH_WPA2PSK;
3338 cred.encr_type = WPS_ENCR_AES;
3339 } else {
3340 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3341 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3342 }
3343 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3344 cred.key_len = wps->new_psk_len;
3345
3346 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3347 wpa_hexdump_ascii_key(MSG_DEBUG,
3348 "WPS: Generated random passphrase",
3349 wps->new_psk, wps->new_psk_len);
3350 if (wps->wps->cred_cb)
3351 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3352
3353 os_free(wps->new_psk);
3354 wps->new_psk = NULL;
3355 }
3356
3357 if (!wps->wps->ap && !wps->er)
3358 wps_sta_cred_cb(wps);
3359
3360 if (wps->new_psk) {
3361 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3362 wps->p2p_dev_addr, wps->new_psk,
3363 wps->new_psk_len)) {
3364 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3365 "new PSK");
3366 }
3367 os_free(wps->new_psk);
3368 wps->new_psk = NULL;
3369 }
3370
3371 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3372 wps->dev_password, wps->dev_password_len);
3373
3374 if (wps->pbc) {
3375 wps_registrar_remove_pbc_session(wps->wps->registrar,
3376 wps->uuid_e,
3377 wps->p2p_dev_addr);
3378 wps_registrar_pbc_completed(wps->wps->registrar);
3379 #ifdef WPS_WORKAROUNDS
3380 os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3381 #endif /* WPS_WORKAROUNDS */
3382 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3383 WPS_UUID_LEN);
3384 } else {
3385 wps_registrar_pin_completed(wps->wps->registrar);
3386 }
3387 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3388 * merge them into APs own list.. */
3389
3390 wps_success_event(wps->wps, wps->mac_addr_e);
3391
3392 return WPS_DONE;
3393 }
3394
3395
wps_registrar_process_msg(struct wps_data * wps,enum wsc_op_code op_code,const struct wpabuf * msg)3396 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3397 enum wsc_op_code op_code,
3398 const struct wpabuf *msg)
3399 {
3400 enum wps_process_res ret;
3401
3402 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3403 "op_code=%d)",
3404 (unsigned long) wpabuf_len(msg), op_code);
3405
3406 #ifdef CONFIG_WPS_UPNP
3407 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3408 struct wps_parse_attr attr;
3409 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3410 *attr.msg_type == WPS_M3)
3411 wps->ext_reg = 2; /* past M2/M2D phase */
3412 }
3413 if (wps->ext_reg > 1)
3414 wps_registrar_free_pending_m2(wps->wps);
3415 if (wps->wps->wps_upnp && wps->ext_reg &&
3416 wps->wps->upnp_msgs == NULL &&
3417 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3418 {
3419 struct wps_parse_attr attr;
3420 int type;
3421 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3422 type = -1;
3423 else
3424 type = *attr.msg_type;
3425 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3426 " to external Registrar for processing", type);
3427 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3428 wps->mac_addr_e,
3429 UPNP_WPS_WLANEVENT_TYPE_EAP,
3430 msg);
3431 if (op_code == WSC_MSG)
3432 return WPS_PENDING;
3433 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3434 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3435 "external Registrar");
3436 return WPS_CONTINUE;
3437 }
3438 #endif /* CONFIG_WPS_UPNP */
3439
3440 switch (op_code) {
3441 case WSC_MSG:
3442 return wps_process_wsc_msg(wps, msg);
3443 case WSC_ACK:
3444 if (wps_validate_wsc_ack(msg) < 0)
3445 return WPS_FAILURE;
3446 return wps_process_wsc_ack(wps, msg);
3447 case WSC_NACK:
3448 if (wps_validate_wsc_nack(msg) < 0)
3449 return WPS_FAILURE;
3450 return wps_process_wsc_nack(wps, msg);
3451 case WSC_Done:
3452 if (wps_validate_wsc_done(msg) < 0)
3453 return WPS_FAILURE;
3454 ret = wps_process_wsc_done(wps, msg);
3455 if (ret == WPS_FAILURE) {
3456 wps->state = SEND_WSC_NACK;
3457 wps_fail_event(wps->wps, WPS_WSC_DONE,
3458 wps->config_error,
3459 wps->error_indication, wps->mac_addr_e);
3460 }
3461 return ret;
3462 default:
3463 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3464 return WPS_FAILURE;
3465 }
3466 }
3467
3468
wps_registrar_update_ie(struct wps_registrar * reg)3469 int wps_registrar_update_ie(struct wps_registrar *reg)
3470 {
3471 return wps_set_ie(reg);
3472 }
3473
3474
wps_registrar_set_selected_timeout(void * eloop_ctx,void * timeout_ctx)3475 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3476 void *timeout_ctx)
3477 {
3478 struct wps_registrar *reg = eloop_ctx;
3479
3480 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3481 "unselect internal Registrar");
3482 reg->selected_registrar = 0;
3483 reg->pbc = 0;
3484 wps_registrar_selected_registrar_changed(reg, 0);
3485 }
3486
3487
3488 #ifdef CONFIG_WPS_UPNP
wps_registrar_sel_reg_add(struct wps_registrar * reg,struct subscription * s)3489 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3490 struct subscription *s)
3491 {
3492 int i, j;
3493 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3494 "config_methods=0x%x)",
3495 s->dev_password_id, s->config_methods);
3496 reg->sel_reg_union = 1;
3497 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3498 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3499 if (reg->sel_reg_config_methods_override == -1)
3500 reg->sel_reg_config_methods_override = 0;
3501 reg->sel_reg_config_methods_override |= s->config_methods;
3502 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3503 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3504 break;
3505 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3506 j++) {
3507 if (is_zero_ether_addr(s->authorized_macs[j]))
3508 break;
3509 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3510 MACSTR, MAC2STR(s->authorized_macs[j]));
3511 os_memcpy(reg->authorized_macs_union[i],
3512 s->authorized_macs[j], ETH_ALEN);
3513 i++;
3514 }
3515 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3516 (u8 *) reg->authorized_macs_union,
3517 sizeof(reg->authorized_macs_union));
3518 }
3519 #endif /* CONFIG_WPS_UPNP */
3520
3521
wps_registrar_sel_reg_union(struct wps_registrar * reg)3522 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3523 {
3524 #ifdef CONFIG_WPS_UPNP
3525 struct subscription *s;
3526
3527 if (reg->wps->wps_upnp == NULL)
3528 return;
3529
3530 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions,
3531 struct subscription, list) {
3532 struct subscr_addr *sa;
3533 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3534 if (sa) {
3535 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3536 inet_ntoa(sa->saddr.sin_addr),
3537 ntohs(sa->saddr.sin_port));
3538 }
3539 if (s->selected_registrar)
3540 wps_registrar_sel_reg_add(reg, s);
3541 else
3542 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3543 "selected");
3544 }
3545 #endif /* CONFIG_WPS_UPNP */
3546 }
3547
3548
3549 /**
3550 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3551 * @reg: Registrar data from wps_registrar_init()
3552 *
3553 * This function is called when selected registrar state changes, e.g., when an
3554 * AP receives a SetSelectedRegistrar UPnP message.
3555 */
wps_registrar_selected_registrar_changed(struct wps_registrar * reg,u16 dev_pw_id)3556 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3557 u16 dev_pw_id)
3558 {
3559 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3560
3561 reg->sel_reg_union = reg->selected_registrar;
3562 reg->sel_reg_dev_password_id_override = -1;
3563 reg->sel_reg_config_methods_override = -1;
3564 os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3565 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3566 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3567 (u8 *) reg->authorized_macs_union,
3568 sizeof(reg->authorized_macs_union));
3569 if (reg->selected_registrar) {
3570 u16 methods;
3571
3572 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3573 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3574 WPS_CONFIG_PHY_PUSHBUTTON);
3575 if (reg->pbc) {
3576 reg->sel_reg_dev_password_id_override =
3577 DEV_PW_PUSHBUTTON;
3578 wps_set_pushbutton(&methods, reg->wps->config_methods);
3579 } else if (dev_pw_id)
3580 reg->sel_reg_dev_password_id_override = dev_pw_id;
3581 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3582 "(pbc=%d)", reg->pbc);
3583 reg->sel_reg_config_methods_override = methods;
3584 } else
3585 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3586
3587 wps_registrar_sel_reg_union(reg);
3588
3589 wps_set_ie(reg);
3590 wps_cb_set_sel_reg(reg);
3591 }
3592
3593
wps_registrar_get_info(struct wps_registrar * reg,const u8 * addr,char * buf,size_t buflen)3594 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3595 char *buf, size_t buflen)
3596 {
3597 struct wps_registrar_device *d;
3598 int len = 0, ret;
3599 char uuid[40];
3600 char devtype[WPS_DEV_TYPE_BUFSIZE];
3601
3602 d = wps_device_get(reg, addr);
3603 if (d == NULL)
3604 return 0;
3605 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3606 return 0;
3607
3608 ret = os_snprintf(buf + len, buflen - len,
3609 "wpsUuid=%s\n"
3610 "wpsPrimaryDeviceType=%s\n"
3611 "wpsDeviceName=%s\n"
3612 "wpsManufacturer=%s\n"
3613 "wpsModelName=%s\n"
3614 "wpsModelNumber=%s\n"
3615 "wpsSerialNumber=%s\n",
3616 uuid,
3617 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3618 sizeof(devtype)),
3619 d->dev.device_name ? d->dev.device_name : "",
3620 d->dev.manufacturer ? d->dev.manufacturer : "",
3621 d->dev.model_name ? d->dev.model_name : "",
3622 d->dev.model_number ? d->dev.model_number : "",
3623 d->dev.serial_number ? d->dev.serial_number : "");
3624 if (os_snprintf_error(buflen - len, ret))
3625 return len;
3626 len += ret;
3627
3628 return len;
3629 }
3630
3631
wps_registrar_config_ap(struct wps_registrar * reg,struct wps_credential * cred)3632 int wps_registrar_config_ap(struct wps_registrar *reg,
3633 struct wps_credential *cred)
3634 {
3635 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3636 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3637 WPS_ENCR_AES))) {
3638 if (cred->encr_type & WPS_ENCR_WEP) {
3639 wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3640 "due to WEP configuration");
3641 return -1;
3642 }
3643
3644 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3645 "invalid encr_type 0x%x", cred->encr_type);
3646 return -1;
3647 }
3648
3649 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3650 WPS_ENCR_TKIP) {
3651 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3652 "TKIP+AES");
3653 cred->encr_type |= WPS_ENCR_AES;
3654 }
3655
3656 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3657 WPS_AUTH_WPAPSK) {
3658 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3659 "WPAPSK+WPA2PSK");
3660 cred->auth_type |= WPS_AUTH_WPA2PSK;
3661 }
3662
3663 if (reg->wps->cred_cb)
3664 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3665
3666 return -1;
3667 }
3668
3669
3670 #ifdef CONFIG_WPS_NFC
3671
wps_registrar_add_nfc_pw_token(struct wps_registrar * reg,const u8 * pubkey_hash,u16 pw_id,const u8 * dev_pw,size_t dev_pw_len,int pk_hash_provided_oob)3672 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3673 const u8 *pubkey_hash, u16 pw_id,
3674 const u8 *dev_pw, size_t dev_pw_len,
3675 int pk_hash_provided_oob)
3676 {
3677 struct wps_nfc_pw_token *token;
3678
3679 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3680 return -1;
3681
3682 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3683 (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3684 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3685 "addition - missing public key hash");
3686 return -1;
3687 }
3688
3689 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id);
3690
3691 token = os_zalloc(sizeof(*token));
3692 if (token == NULL)
3693 return -1;
3694
3695 token->peer_pk_hash_known = pubkey_hash != NULL;
3696 if (pubkey_hash)
3697 os_memcpy(token->pubkey_hash, pubkey_hash,
3698 WPS_OOB_PUBKEY_HASH_LEN);
3699 token->pw_id = pw_id;
3700 token->pk_hash_provided_oob = pk_hash_provided_oob;
3701 if (dev_pw) {
3702 wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3703 sizeof(token->dev_pw),
3704 dev_pw, dev_pw_len);
3705 token->dev_pw_len = dev_pw_len * 2;
3706 }
3707
3708 dl_list_add(®->nfc_pw_tokens, &token->list);
3709
3710 reg->selected_registrar = 1;
3711 reg->pbc = 0;
3712 wps_registrar_add_authorized_mac(reg,
3713 (u8 *) "\xff\xff\xff\xff\xff\xff");
3714 wps_registrar_selected_registrar_changed(reg, pw_id);
3715 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3716 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3717 wps_registrar_set_selected_timeout,
3718 reg, NULL);
3719
3720 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3721 pw_id);
3722
3723 return 0;
3724 }
3725
3726
wps_registrar_add_nfc_password_token(struct wps_registrar * reg,const u8 * oob_dev_pw,size_t oob_dev_pw_len)3727 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3728 const u8 *oob_dev_pw,
3729 size_t oob_dev_pw_len)
3730 {
3731 const u8 *pos, *hash, *dev_pw;
3732 u16 id;
3733 size_t dev_pw_len;
3734
3735 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3736 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3737 WPS_OOB_DEVICE_PASSWORD_LEN)
3738 return -1;
3739
3740 hash = oob_dev_pw;
3741 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3742 id = WPA_GET_BE16(pos);
3743 dev_pw = pos + 2;
3744 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3745
3746 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3747 id);
3748
3749 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3750 hash, WPS_OOB_PUBKEY_HASH_LEN);
3751 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3752
3753 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3754 dev_pw_len, 0);
3755 }
3756
3757
wps_registrar_remove_nfc_pw_token(struct wps_registrar * reg,struct wps_nfc_pw_token * token)3758 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3759 struct wps_nfc_pw_token *token)
3760 {
3761 wps_registrar_remove_authorized_mac(reg,
3762 (u8 *) "\xff\xff\xff\xff\xff\xff");
3763 wps_registrar_selected_registrar_changed(reg, 0);
3764
3765 /*
3766 * Free the NFC password token if it was used only for a single protocol
3767 * run. The static handover case uses the same password token multiple
3768 * times, so do not free that case here.
3769 */
3770 if (token->peer_pk_hash_known)
3771 os_free(token);
3772 }
3773
3774 #endif /* CONFIG_WPS_NFC */
3775