Line data Source code
1 : /*
2 : * Wi-Fi Protected Setup - Registrar
3 : * Copyright (c) 2008-2013, 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 :
42 0 : static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
43 : {
44 0 : dl_list_del(&token->list);
45 0 : bin_clear_free(token, sizeof(*token));
46 0 : }
47 :
48 :
49 79 : static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
50 : {
51 : struct wps_nfc_pw_token *token, *prev;
52 79 : dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
53 : list) {
54 0 : if (pw_id == 0 || pw_id == token->pw_id)
55 0 : wps_remove_nfc_pw_token(token);
56 : }
57 79 : }
58 :
59 :
60 13 : 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 13 : dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
65 9 : if (pw_id == token->pw_id)
66 9 : return token;
67 : }
68 4 : 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 :
92 14 : static void wps_free_pin(struct wps_uuid_pin *pin)
93 : {
94 14 : bin_clear_free(pin->pin, pin->pin_len);
95 14 : os_free(pin);
96 14 : }
97 :
98 :
99 14 : static void wps_remove_pin(struct wps_uuid_pin *pin)
100 : {
101 14 : dl_list_del(&pin->list);
102 14 : wps_free_pin(pin);
103 14 : }
104 :
105 :
106 70 : static void wps_free_pins(struct dl_list *pins)
107 : {
108 : struct wps_uuid_pin *pin, *prev;
109 71 : dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
110 1 : wps_remove_pin(pin);
111 70 : }
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 :
122 70 : static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
123 : {
124 : struct wps_pbc_session *prev;
125 :
126 146 : while (pbc) {
127 6 : prev = pbc;
128 6 : pbc = pbc->next;
129 6 : os_free(prev);
130 : }
131 70 : }
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 :
194 : static int wps_set_ie(struct wps_registrar *reg);
195 : static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
196 : static void wps_registrar_set_selected_timeout(void *eloop_ctx,
197 : void *timeout_ctx);
198 : static void wps_registrar_remove_pin(struct wps_registrar *reg,
199 : struct wps_uuid_pin *pin);
200 :
201 :
202 50 : static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
203 : const u8 *addr)
204 : {
205 : int i;
206 300 : wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
207 300 : MAC2STR(addr));
208 290 : for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
209 242 : if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
210 2 : wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
211 : "already in the list");
212 52 : return; /* already in list */
213 : }
214 240 : for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
215 192 : os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
216 : ETH_ALEN);
217 48 : os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
218 48 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
219 48 : (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
220 : }
221 :
222 :
223 44 : static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
224 : const u8 *addr)
225 : {
226 : int i;
227 264 : wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
228 264 : MAC2STR(addr));
229 49 : for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
230 48 : if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
231 43 : break;
232 : }
233 44 : if (i == WPS_MAX_AUTHORIZED_MACS) {
234 1 : wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
235 : "list");
236 45 : return; /* not in the list */
237 : }
238 215 : for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
239 172 : os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
240 : ETH_ALEN);
241 43 : os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
242 : ETH_ALEN);
243 43 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
244 43 : (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
245 : }
246 :
247 :
248 70 : static void wps_free_devices(struct wps_registrar_device *dev)
249 : {
250 : struct wps_registrar_device *prev;
251 :
252 202 : while (dev) {
253 62 : prev = dev;
254 62 : dev = dev->next;
255 62 : wps_device_data_free(&prev->dev);
256 62 : os_free(prev);
257 : }
258 70 : }
259 :
260 :
261 67 : static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
262 : const u8 *addr)
263 : {
264 : struct wps_registrar_device *dev;
265 :
266 91 : for (dev = reg->devices; dev; dev = dev->next) {
267 29 : if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
268 5 : return dev;
269 : }
270 62 : return NULL;
271 : }
272 :
273 :
274 64 : static void wps_device_clone_data(struct wps_device_data *dst,
275 : struct wps_device_data *src)
276 : {
277 64 : os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
278 64 : os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
279 :
280 : #define WPS_STRDUP(n) \
281 : os_free(dst->n); \
282 : dst->n = src->n ? os_strdup(src->n) : NULL
283 :
284 64 : WPS_STRDUP(device_name);
285 64 : WPS_STRDUP(manufacturer);
286 64 : WPS_STRDUP(model_name);
287 64 : WPS_STRDUP(model_number);
288 64 : WPS_STRDUP(serial_number);
289 : #undef WPS_STRDUP
290 64 : }
291 :
292 :
293 64 : int wps_device_store(struct wps_registrar *reg,
294 : struct wps_device_data *dev, const u8 *uuid)
295 : {
296 : struct wps_registrar_device *d;
297 :
298 64 : d = wps_device_get(reg, dev->mac_addr);
299 64 : if (d == NULL) {
300 62 : d = os_zalloc(sizeof(*d));
301 62 : if (d == NULL)
302 0 : return -1;
303 62 : d->next = reg->devices;
304 62 : reg->devices = d;
305 : }
306 :
307 64 : wps_device_clone_data(&d->dev, dev);
308 64 : os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
309 :
310 64 : return 0;
311 : }
312 :
313 :
314 47 : static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
315 : const u8 *addr, const u8 *uuid_e)
316 : {
317 47 : struct wps_pbc_session *pbc, *prev = NULL;
318 : struct os_reltime now;
319 :
320 47 : os_get_reltime(&now);
321 :
322 47 : pbc = reg->pbc_sessions;
323 95 : while (pbc) {
324 43 : if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
325 21 : os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
326 21 : if (prev)
327 0 : prev->next = pbc->next;
328 : else
329 21 : reg->pbc_sessions = pbc->next;
330 21 : break;
331 : }
332 1 : prev = pbc;
333 1 : pbc = pbc->next;
334 : }
335 :
336 47 : if (!pbc) {
337 26 : pbc = os_zalloc(sizeof(*pbc));
338 26 : if (pbc == NULL)
339 47 : return;
340 26 : os_memcpy(pbc->addr, addr, ETH_ALEN);
341 26 : if (uuid_e)
342 26 : os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
343 : }
344 :
345 47 : pbc->next = reg->pbc_sessions;
346 47 : reg->pbc_sessions = pbc;
347 47 : pbc->timestamp = now;
348 :
349 : /* remove entries that have timed out */
350 47 : prev = pbc;
351 47 : pbc = pbc->next;
352 :
353 95 : while (pbc) {
354 1 : if (os_reltime_expired(&now, &pbc->timestamp,
355 : WPS_PBC_WALK_TIME)) {
356 0 : prev->next = NULL;
357 0 : wps_free_pbc_sessions(pbc);
358 0 : break;
359 : }
360 1 : prev = pbc;
361 1 : pbc = pbc->next;
362 : }
363 : }
364 :
365 :
366 20 : static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
367 : const u8 *uuid_e,
368 : const u8 *p2p_dev_addr)
369 : {
370 20 : struct wps_pbc_session *pbc, *prev = NULL, *tmp;
371 :
372 20 : pbc = reg->pbc_sessions;
373 60 : while (pbc) {
374 20 : if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
375 0 : (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
376 0 : os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
377 : 0)) {
378 20 : if (prev)
379 0 : prev->next = pbc->next;
380 : else
381 20 : reg->pbc_sessions = pbc->next;
382 20 : tmp = pbc;
383 20 : pbc = pbc->next;
384 120 : wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
385 120 : "addr=" MACSTR, MAC2STR(tmp->addr));
386 20 : wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
387 20 : tmp->uuid_e, WPS_UUID_LEN);
388 20 : os_free(tmp);
389 20 : continue;
390 : }
391 0 : prev = pbc;
392 0 : pbc = pbc->next;
393 : }
394 20 : }
395 :
396 :
397 75 : int wps_registrar_pbc_overlap(struct wps_registrar *reg,
398 : const u8 *addr, const u8 *uuid_e)
399 : {
400 75 : int count = 0;
401 : struct wps_pbc_session *pbc;
402 75 : struct wps_pbc_session *first = NULL;
403 : struct os_reltime now;
404 :
405 75 : os_get_reltime(&now);
406 :
407 75 : wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
408 :
409 75 : if (uuid_e) {
410 47 : wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
411 47 : wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
412 : uuid_e, WPS_UUID_LEN);
413 47 : count++;
414 : }
415 :
416 125 : for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
417 300 : wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
418 300 : MAC2STR(pbc->addr));
419 50 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
420 50 : pbc->uuid_e, WPS_UUID_LEN);
421 50 : if (os_reltime_expired(&now, &pbc->timestamp,
422 : WPS_PBC_WALK_TIME)) {
423 0 : wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired");
424 0 : break;
425 : }
426 52 : if (first &&
427 2 : os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
428 0 : wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
429 0 : continue; /* same Enrollee */
430 : }
431 98 : if (uuid_e == NULL ||
432 48 : os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
433 3 : wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
434 3 : count++;
435 : }
436 50 : if (first == NULL)
437 48 : first = pbc;
438 : }
439 :
440 75 : wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
441 :
442 75 : return count > 1 ? 1 : 0;
443 : }
444 :
445 :
446 472 : static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
447 : {
448 472 : wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
449 472 : wps->wps_state);
450 472 : wpabuf_put_be16(msg, ATTR_WPS_STATE);
451 472 : wpabuf_put_be16(msg, 1);
452 472 : wpabuf_put_u8(msg, wps->wps_state);
453 472 : return 0;
454 : }
455 :
456 :
457 : #ifdef CONFIG_WPS_UPNP
458 50 : static void wps_registrar_free_pending_m2(struct wps_context *wps)
459 : {
460 50 : struct upnp_pending_message *p, *p2, *prev = NULL;
461 50 : p = wps->upnp_msgs;
462 130 : while (p) {
463 30 : if (p->type == WPS_M2 || p->type == WPS_M2D) {
464 0 : if (prev == NULL)
465 0 : wps->upnp_msgs = p->next;
466 : else
467 0 : prev->next = p->next;
468 0 : wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
469 0 : p2 = p;
470 0 : p = p->next;
471 0 : wpabuf_free(p2->msg);
472 0 : os_free(p2);
473 0 : continue;
474 : }
475 30 : prev = p;
476 30 : p = p->next;
477 : }
478 50 : }
479 : #endif /* CONFIG_WPS_UPNP */
480 :
481 :
482 472 : static int wps_build_ap_setup_locked(struct wps_context *wps,
483 : struct wpabuf *msg)
484 : {
485 472 : if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
486 10 : wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
487 10 : wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
488 10 : wpabuf_put_be16(msg, 1);
489 10 : wpabuf_put_u8(msg, 1);
490 : }
491 472 : return 0;
492 : }
493 :
494 :
495 472 : static int wps_build_selected_registrar(struct wps_registrar *reg,
496 : struct wpabuf *msg)
497 : {
498 472 : if (!reg->sel_reg_union)
499 322 : return 0;
500 150 : wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
501 150 : wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
502 150 : wpabuf_put_be16(msg, 1);
503 150 : wpabuf_put_u8(msg, 1);
504 150 : return 0;
505 : }
506 :
507 :
508 472 : static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
509 : struct wpabuf *msg)
510 : {
511 472 : u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
512 472 : if (!reg->sel_reg_union)
513 322 : return 0;
514 150 : if (reg->sel_reg_dev_password_id_override >= 0)
515 96 : id = reg->sel_reg_dev_password_id_override;
516 150 : wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
517 150 : wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
518 150 : wpabuf_put_be16(msg, 2);
519 150 : wpabuf_put_be16(msg, id);
520 150 : return 0;
521 : }
522 :
523 :
524 236 : static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
525 : struct wpabuf *msg)
526 : {
527 236 : u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
528 236 : if (!reg->sel_reg_union)
529 161 : return 0;
530 75 : if (reg->sel_reg_dev_password_id_override >= 0)
531 48 : id = reg->sel_reg_dev_password_id_override;
532 75 : if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
533 73 : return 0;
534 2 : return wps_build_uuid_e(msg, reg->wps->uuid);
535 : }
536 :
537 :
538 81 : static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
539 : {
540 81 : *methods |= WPS_CONFIG_PUSHBUTTON;
541 81 : if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
542 : WPS_CONFIG_VIRT_PUSHBUTTON)
543 0 : *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
544 81 : if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
545 : WPS_CONFIG_PHY_PUSHBUTTON)
546 0 : *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
547 81 : if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
548 81 : WPS_CONFIG_VIRT_PUSHBUTTON &&
549 81 : (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
550 : WPS_CONFIG_PHY_PUSHBUTTON) {
551 : /*
552 : * Required to include virtual/physical flag, but we were not
553 : * configured with push button type, so have to default to one
554 : * of them.
555 : */
556 81 : *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
557 : }
558 81 : }
559 :
560 :
561 472 : static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
562 : struct wpabuf *msg)
563 : {
564 : u16 methods;
565 472 : if (!reg->sel_reg_union)
566 322 : return 0;
567 150 : methods = reg->wps->config_methods;
568 150 : methods &= ~WPS_CONFIG_PUSHBUTTON;
569 150 : methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
570 : WPS_CONFIG_PHY_PUSHBUTTON);
571 150 : if (reg->pbc)
572 54 : wps_set_pushbutton(&methods, reg->wps->config_methods);
573 150 : if (reg->sel_reg_config_methods_override >= 0)
574 150 : methods = reg->sel_reg_config_methods_override;
575 150 : wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
576 : methods);
577 150 : wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
578 150 : wpabuf_put_be16(msg, 2);
579 150 : wpabuf_put_be16(msg, methods);
580 150 : return 0;
581 : }
582 :
583 :
584 236 : static int wps_build_probe_config_methods(struct wps_registrar *reg,
585 : struct wpabuf *msg)
586 : {
587 : u16 methods;
588 : /*
589 : * These are the methods that the AP supports as an Enrollee for adding
590 : * external Registrars.
591 : */
592 236 : methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
593 236 : methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
594 : WPS_CONFIG_PHY_PUSHBUTTON);
595 236 : wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
596 236 : wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
597 236 : wpabuf_put_be16(msg, 2);
598 236 : wpabuf_put_be16(msg, methods);
599 236 : return 0;
600 : }
601 :
602 :
603 53 : static int wps_build_config_methods_r(struct wps_registrar *reg,
604 : struct wpabuf *msg)
605 : {
606 53 : return wps_build_config_methods(msg, reg->wps->config_methods);
607 : }
608 :
609 :
610 236 : const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
611 : {
612 236 : *count = 0;
613 :
614 543 : while (*count < WPS_MAX_AUTHORIZED_MACS) {
615 307 : if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
616 236 : break;
617 71 : (*count)++;
618 : }
619 :
620 236 : return (const u8 *) reg->authorized_macs_union;
621 : }
622 :
623 :
624 : /**
625 : * wps_registrar_init - Initialize WPS Registrar data
626 : * @wps: Pointer to longterm WPS context
627 : * @cfg: Registrar configuration
628 : * Returns: Pointer to allocated Registrar data or %NULL on failure
629 : *
630 : * This function is used to initialize WPS Registrar functionality. It can be
631 : * used for a single Registrar run (e.g., when run in a supplicant) or multiple
632 : * runs (e.g., when run as an internal Registrar in an AP). Caller is
633 : * responsible for freeing the returned data with wps_registrar_deinit() when
634 : * Registrar functionality is not needed anymore.
635 : */
636 : struct wps_registrar *
637 70 : wps_registrar_init(struct wps_context *wps,
638 : const struct wps_registrar_config *cfg)
639 : {
640 70 : struct wps_registrar *reg = os_zalloc(sizeof(*reg));
641 70 : if (reg == NULL)
642 0 : return NULL;
643 :
644 70 : dl_list_init(®->pins);
645 70 : dl_list_init(®->nfc_pw_tokens);
646 70 : reg->wps = wps;
647 70 : reg->new_psk_cb = cfg->new_psk_cb;
648 70 : reg->set_ie_cb = cfg->set_ie_cb;
649 70 : reg->pin_needed_cb = cfg->pin_needed_cb;
650 70 : reg->reg_success_cb = cfg->reg_success_cb;
651 70 : reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
652 70 : reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
653 70 : reg->cb_ctx = cfg->cb_ctx;
654 70 : reg->skip_cred_build = cfg->skip_cred_build;
655 70 : if (cfg->extra_cred) {
656 2 : reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
657 : cfg->extra_cred_len);
658 2 : if (reg->extra_cred == NULL) {
659 0 : os_free(reg);
660 0 : return NULL;
661 : }
662 : }
663 70 : reg->disable_auto_conf = cfg->disable_auto_conf;
664 70 : reg->sel_reg_dev_password_id_override = -1;
665 70 : reg->sel_reg_config_methods_override = -1;
666 70 : reg->static_wep_only = cfg->static_wep_only;
667 70 : reg->dualband = cfg->dualband;
668 70 : reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk;
669 :
670 70 : if (wps_set_ie(reg)) {
671 0 : wps_registrar_deinit(reg);
672 0 : return NULL;
673 : }
674 :
675 70 : return reg;
676 : }
677 :
678 :
679 : /**
680 : * wps_registrar_deinit - Deinitialize WPS Registrar data
681 : * @reg: Registrar data from wps_registrar_init()
682 : */
683 70 : void wps_registrar_deinit(struct wps_registrar *reg)
684 : {
685 70 : if (reg == NULL)
686 70 : return;
687 70 : eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
688 70 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
689 70 : wps_free_pins(®->pins);
690 70 : wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0);
691 70 : wps_free_pbc_sessions(reg->pbc_sessions);
692 70 : wpabuf_free(reg->extra_cred);
693 70 : wps_free_devices(reg->devices);
694 70 : os_free(reg);
695 : }
696 :
697 :
698 12 : static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
699 : {
700 : struct wps_uuid_pin *pin;
701 :
702 13 : dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
703 1 : if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
704 0 : wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
705 : "configured wildcard PIN");
706 0 : wps_registrar_remove_pin(reg, pin);
707 0 : break;
708 : }
709 : }
710 12 : }
711 :
712 :
713 : /**
714 : * wps_registrar_add_pin - Configure a new PIN for Registrar
715 : * @reg: Registrar data from wps_registrar_init()
716 : * @addr: Enrollee MAC address or %NULL if not known
717 : * @uuid: UUID-E or %NULL for wildcard (any UUID)
718 : * @pin: PIN (Device Password)
719 : * @pin_len: Length of pin in octets
720 : * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
721 : * Returns: 0 on success, -1 on failure
722 : */
723 14 : int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
724 : const u8 *uuid, const u8 *pin, size_t pin_len,
725 : int timeout)
726 : {
727 : struct wps_uuid_pin *p;
728 :
729 14 : p = os_zalloc(sizeof(*p));
730 14 : if (p == NULL)
731 0 : return -1;
732 14 : if (addr)
733 1 : os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
734 14 : if (uuid == NULL)
735 12 : p->wildcard_uuid = 1;
736 : else
737 2 : os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
738 14 : p->pin = os_malloc(pin_len);
739 14 : if (p->pin == NULL) {
740 0 : os_free(p);
741 0 : return -1;
742 : }
743 14 : os_memcpy(p->pin, pin, pin_len);
744 14 : p->pin_len = pin_len;
745 :
746 14 : if (timeout) {
747 2 : p->flags |= PIN_EXPIRES;
748 2 : os_get_reltime(&p->expiration);
749 2 : p->expiration.sec += timeout;
750 : }
751 :
752 14 : if (p->wildcard_uuid)
753 12 : wps_registrar_invalidate_unused(reg);
754 :
755 14 : dl_list_add(®->pins, &p->list);
756 :
757 14 : wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
758 : timeout);
759 14 : wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
760 14 : wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
761 14 : reg->selected_registrar = 1;
762 14 : reg->pbc = 0;
763 14 : if (addr)
764 1 : wps_registrar_add_authorized_mac(reg, addr);
765 : else
766 13 : wps_registrar_add_authorized_mac(
767 : reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
768 14 : wps_registrar_selected_registrar_changed(reg, 0);
769 14 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
770 14 : eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
771 : wps_registrar_set_selected_timeout,
772 : reg, NULL);
773 :
774 14 : return 0;
775 : }
776 :
777 :
778 13 : static void wps_registrar_remove_pin(struct wps_registrar *reg,
779 : struct wps_uuid_pin *pin)
780 : {
781 : u8 *addr;
782 13 : u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
783 :
784 13 : if (is_zero_ether_addr(pin->enrollee_addr))
785 12 : addr = bcast;
786 : else
787 1 : addr = pin->enrollee_addr;
788 13 : wps_registrar_remove_authorized_mac(reg, addr);
789 13 : wps_remove_pin(pin);
790 13 : wps_registrar_selected_registrar_changed(reg, 0);
791 13 : }
792 :
793 :
794 21 : static void wps_registrar_expire_pins(struct wps_registrar *reg)
795 : {
796 : struct wps_uuid_pin *pin, *prev;
797 : struct os_reltime now;
798 :
799 21 : os_get_reltime(&now);
800 36 : dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
801 : {
802 17 : if ((pin->flags & PIN_EXPIRES) &&
803 2 : os_reltime_before(&pin->expiration, &now)) {
804 1 : wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
805 1 : pin->uuid, WPS_UUID_LEN);
806 1 : wps_registrar_remove_pin(reg, pin);
807 : }
808 : }
809 21 : }
810 :
811 :
812 : /**
813 : * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
814 : * @reg: Registrar data from wps_registrar_init()
815 : * @dev_pw: PIN to search for or %NULL to match any
816 : * @dev_pw_len: Length of dev_pw in octets
817 : * Returns: 0 on success, -1 if not wildcard PIN is enabled
818 : */
819 3 : static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
820 : const u8 *dev_pw,
821 : size_t dev_pw_len)
822 : {
823 : struct wps_uuid_pin *pin, *prev;
824 :
825 3 : dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
826 : {
827 3 : if (dev_pw && pin->pin &&
828 2 : (dev_pw_len != pin->pin_len ||
829 1 : os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0))
830 0 : continue; /* different PIN */
831 2 : if (pin->wildcard_uuid) {
832 2 : wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
833 2 : pin->uuid, WPS_UUID_LEN);
834 2 : wps_registrar_remove_pin(reg, pin);
835 2 : return 0;
836 : }
837 : }
838 :
839 1 : return -1;
840 : }
841 :
842 :
843 : /**
844 : * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
845 : * @reg: Registrar data from wps_registrar_init()
846 : * @uuid: UUID-E
847 : * Returns: 0 on success, -1 on failure (e.g., PIN not found)
848 : */
849 32 : int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
850 : {
851 : struct wps_uuid_pin *pin, *prev;
852 :
853 32 : dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
854 : {
855 10 : if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
856 10 : wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
857 10 : pin->uuid, WPS_UUID_LEN);
858 10 : wps_registrar_remove_pin(reg, pin);
859 10 : return 0;
860 : }
861 : }
862 :
863 22 : return -1;
864 : }
865 :
866 :
867 21 : static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
868 : const u8 *uuid, size_t *pin_len)
869 : {
870 21 : struct wps_uuid_pin *pin, *found = NULL;
871 :
872 21 : wps_registrar_expire_pins(reg);
873 :
874 32 : dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
875 16 : if (!pin->wildcard_uuid &&
876 3 : os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
877 2 : found = pin;
878 2 : break;
879 : }
880 : }
881 :
882 21 : if (!found) {
883 : /* Check for wildcard UUIDs since none of the UUID-specific
884 : * PINs matched */
885 19 : dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
886 9 : if (pin->wildcard_uuid == 1 ||
887 0 : pin->wildcard_uuid == 2) {
888 9 : wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
889 : "PIN. Assigned it for this UUID-E");
890 9 : pin->wildcard_uuid++;
891 9 : os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
892 9 : found = pin;
893 9 : break;
894 : }
895 : }
896 : }
897 :
898 21 : if (!found)
899 10 : return NULL;
900 :
901 : /*
902 : * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
903 : * that could otherwise avoid PIN invalidations.
904 : */
905 11 : if (found->flags & PIN_LOCKED) {
906 0 : wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
907 : "allow concurrent re-use");
908 0 : return NULL;
909 : }
910 11 : *pin_len = found->pin_len;
911 11 : found->flags |= PIN_LOCKED;
912 11 : return found->pin;
913 : }
914 :
915 :
916 : /**
917 : * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
918 : * @reg: Registrar data from wps_registrar_init()
919 : * @uuid: UUID-E
920 : * Returns: 0 on success, -1 on failure
921 : *
922 : * PINs are locked to enforce only one concurrent use. This function unlocks a
923 : * PIN to allow it to be used again. If the specified PIN was configured using
924 : * a wildcard UUID, it will be removed instead of allowing multiple uses.
925 : */
926 83 : int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
927 : {
928 : struct wps_uuid_pin *pin;
929 :
930 84 : dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
931 11 : if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
932 10 : if (pin->wildcard_uuid == 3) {
933 0 : wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
934 : "wildcard PIN");
935 0 : return wps_registrar_invalidate_pin(reg, uuid);
936 : }
937 10 : pin->flags &= ~PIN_LOCKED;
938 10 : return 0;
939 : }
940 : }
941 :
942 73 : return -1;
943 : }
944 :
945 :
946 22 : static void wps_registrar_stop_pbc(struct wps_registrar *reg)
947 : {
948 22 : reg->selected_registrar = 0;
949 22 : reg->pbc = 0;
950 22 : os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
951 22 : wps_registrar_remove_authorized_mac(reg,
952 : (u8 *) "\xff\xff\xff\xff\xff\xff");
953 22 : wps_registrar_selected_registrar_changed(reg, 0);
954 22 : }
955 :
956 :
957 2 : static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
958 : {
959 2 : struct wps_registrar *reg = eloop_ctx;
960 :
961 2 : wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
962 2 : wps_pbc_timeout_event(reg->wps);
963 2 : wps_registrar_stop_pbc(reg);
964 2 : }
965 :
966 :
967 : /**
968 : * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
969 : * @reg: Registrar data from wps_registrar_init()
970 : * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
971 : * indicates no such filtering
972 : * Returns: 0 on success, -1 on failure, -2 on session overlap
973 : *
974 : * This function is called on an AP when a push button is pushed to activate
975 : * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
976 : * or when a PBC registration is completed. If more than one Enrollee in active
977 : * PBC mode has been detected during the monitor time (previous 2 minutes), the
978 : * PBC mode is not activated and -2 is returned to indicate session overlap.
979 : * This is skipped if a specific Enrollee is selected.
980 : */
981 28 : int wps_registrar_button_pushed(struct wps_registrar *reg,
982 : const u8 *p2p_dev_addr)
983 : {
984 56 : if (p2p_dev_addr == NULL &&
985 28 : wps_registrar_pbc_overlap(reg, NULL, NULL)) {
986 1 : wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
987 : "mode");
988 1 : wps_pbc_overlap_event(reg->wps);
989 1 : return -2;
990 : }
991 27 : wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
992 27 : reg->force_pbc_overlap = 0;
993 27 : reg->selected_registrar = 1;
994 27 : reg->pbc = 1;
995 27 : if (p2p_dev_addr)
996 0 : os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
997 : else
998 27 : os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
999 27 : wps_registrar_add_authorized_mac(reg,
1000 : (u8 *) "\xff\xff\xff\xff\xff\xff");
1001 27 : wps_registrar_selected_registrar_changed(reg, 0);
1002 :
1003 27 : wps_pbc_active_event(reg->wps);
1004 27 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1005 27 : eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1006 27 : eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1007 : reg, NULL);
1008 27 : return 0;
1009 : }
1010 :
1011 :
1012 20 : static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1013 : {
1014 20 : wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1015 20 : eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1016 20 : wps_registrar_stop_pbc(reg);
1017 20 : wps_pbc_disable_event(reg->wps);
1018 20 : }
1019 :
1020 :
1021 18 : static void wps_registrar_pin_completed(struct wps_registrar *reg)
1022 : {
1023 18 : wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1024 18 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1025 18 : reg->selected_registrar = 0;
1026 18 : wps_registrar_selected_registrar_changed(reg, 0);
1027 18 : }
1028 :
1029 :
1030 2 : void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1031 : const u8 *dev_pw, size_t dev_pw_len)
1032 : {
1033 2 : if (registrar->pbc) {
1034 1 : wps_registrar_remove_pbc_session(registrar,
1035 : uuid_e, NULL);
1036 1 : wps_registrar_pbc_completed(registrar);
1037 : #ifdef WPS_WORKAROUNDS
1038 1 : os_get_reltime(®istrar->pbc_ignore_start);
1039 : #endif /* WPS_WORKAROUNDS */
1040 1 : os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1041 : } else {
1042 1 : wps_registrar_pin_completed(registrar);
1043 : }
1044 :
1045 4 : if (dev_pw &&
1046 2 : wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1047 : dev_pw_len) == 0) {
1048 1 : wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1049 : dev_pw, dev_pw_len);
1050 : }
1051 2 : }
1052 :
1053 :
1054 3 : int wps_registrar_wps_cancel(struct wps_registrar *reg)
1055 : {
1056 3 : if (reg->pbc) {
1057 2 : wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1058 2 : wps_registrar_pbc_timeout(reg, NULL);
1059 2 : eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1060 2 : return 1;
1061 1 : } else if (reg->selected_registrar) {
1062 : /* PIN Method */
1063 1 : wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1064 1 : wps_registrar_pin_completed(reg);
1065 1 : wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1066 1 : return 1;
1067 : }
1068 0 : return 0;
1069 : }
1070 :
1071 :
1072 : /**
1073 : * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1074 : * @reg: Registrar data from wps_registrar_init()
1075 : * @addr: MAC address of the Probe Request sender
1076 : * @wps_data: WPS IE contents
1077 : *
1078 : * This function is called on an AP when a Probe Request with WPS IE is
1079 : * received. This is used to track PBC mode use and to detect possible overlap
1080 : * situation with other WPS APs.
1081 : */
1082 163 : void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1083 : const struct wpabuf *wps_data,
1084 : int p2p_wildcard)
1085 : {
1086 : struct wps_parse_attr attr;
1087 163 : int skip_add = 0;
1088 :
1089 163 : wpa_hexdump_buf(MSG_MSGDUMP,
1090 : "WPS: Probe Request with WPS data received",
1091 : wps_data);
1092 :
1093 163 : if (wps_parse_msg(wps_data, &attr) < 0)
1094 136 : return;
1095 :
1096 163 : if (attr.config_methods == NULL) {
1097 0 : wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1098 : "Probe Request");
1099 0 : return;
1100 : }
1101 :
1102 163 : if (attr.dev_password_id == NULL) {
1103 0 : wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1104 : "in Probe Request");
1105 0 : return;
1106 : }
1107 :
1108 326 : if (reg->enrollee_seen_cb && attr.uuid_e &&
1109 326 : attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1110 163 : char *dev_name = NULL;
1111 163 : if (attr.dev_name) {
1112 163 : dev_name = os_zalloc(attr.dev_name_len + 1);
1113 163 : if (dev_name) {
1114 163 : os_memcpy(dev_name, attr.dev_name,
1115 : attr.dev_name_len);
1116 : }
1117 : }
1118 652 : reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1119 : attr.primary_dev_type,
1120 163 : WPA_GET_BE16(attr.config_methods),
1121 163 : WPA_GET_BE16(attr.dev_password_id),
1122 163 : *attr.request_type, dev_name);
1123 163 : os_free(dev_name);
1124 : }
1125 :
1126 163 : if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1127 136 : return; /* Not PBC */
1128 :
1129 162 : wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1130 162 : MACSTR, MAC2STR(addr));
1131 27 : if (attr.uuid_e == NULL) {
1132 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1133 : "UUID-E included");
1134 0 : return;
1135 : }
1136 27 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1137 : WPS_UUID_LEN);
1138 :
1139 : #ifdef WPS_WORKAROUNDS
1140 29 : if (reg->pbc_ignore_start.sec &&
1141 2 : os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1142 : struct os_reltime now, dur;
1143 0 : os_get_reltime(&now);
1144 0 : os_reltime_sub(&now, ®->pbc_ignore_start, &dur);
1145 0 : if (dur.sec >= 0 && dur.sec < 5) {
1146 0 : wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1147 : "based on Probe Request from the Enrollee "
1148 : "that just completed PBC provisioning");
1149 0 : skip_add = 1;
1150 : } else
1151 0 : reg->pbc_ignore_start.sec = 0;
1152 : }
1153 : #endif /* WPS_WORKAROUNDS */
1154 :
1155 27 : if (!skip_add)
1156 27 : wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1157 27 : if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1158 1 : wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1159 1 : reg->force_pbc_overlap = 1;
1160 1 : wps_pbc_overlap_event(reg->wps);
1161 : }
1162 : }
1163 :
1164 :
1165 7 : int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1166 : const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len)
1167 : {
1168 7 : if (reg->new_psk_cb == NULL)
1169 0 : return 0;
1170 :
1171 7 : return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk,
1172 : psk_len);
1173 : }
1174 :
1175 :
1176 10 : static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1177 : const struct wps_device_data *dev)
1178 : {
1179 10 : if (reg->pin_needed_cb == NULL)
1180 10 : return;
1181 :
1182 10 : reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1183 : }
1184 :
1185 :
1186 35 : static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1187 : const u8 *uuid_e, const u8 *dev_pw,
1188 : size_t dev_pw_len)
1189 : {
1190 35 : if (reg->reg_success_cb == NULL)
1191 35 : return;
1192 :
1193 35 : reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1194 : }
1195 :
1196 :
1197 236 : static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1198 : struct wpabuf *probe_resp_ie)
1199 : {
1200 236 : return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1201 : }
1202 :
1203 :
1204 141 : static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1205 : {
1206 141 : u16 methods = 0;
1207 141 : if (reg->set_sel_reg_cb == NULL)
1208 282 : return;
1209 :
1210 0 : if (reg->selected_registrar) {
1211 0 : methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1212 0 : methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1213 : WPS_CONFIG_PHY_PUSHBUTTON);
1214 0 : if (reg->pbc)
1215 0 : wps_set_pushbutton(&methods, reg->wps->config_methods);
1216 : }
1217 :
1218 0 : wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1219 : "config_methods=0x%x pbc=%d methods=0x%x",
1220 0 : reg->selected_registrar, reg->wps->config_methods,
1221 : reg->pbc, methods);
1222 :
1223 0 : reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1224 0 : reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1225 : methods);
1226 : }
1227 :
1228 :
1229 236 : static int wps_set_ie(struct wps_registrar *reg)
1230 : {
1231 : struct wpabuf *beacon;
1232 : struct wpabuf *probe;
1233 : const u8 *auth_macs;
1234 : size_t count;
1235 236 : size_t vendor_len = 0;
1236 : int i;
1237 :
1238 236 : if (reg->set_ie_cb == NULL)
1239 0 : return 0;
1240 :
1241 2596 : for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1242 2360 : if (reg->wps->dev.vendor_ext[i]) {
1243 0 : vendor_len += 2 + 2;
1244 0 : vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1245 : }
1246 : }
1247 :
1248 236 : beacon = wpabuf_alloc(400 + vendor_len);
1249 236 : if (beacon == NULL)
1250 0 : return -1;
1251 236 : probe = wpabuf_alloc(500 + vendor_len);
1252 236 : if (probe == NULL) {
1253 0 : wpabuf_free(beacon);
1254 0 : return -1;
1255 : }
1256 :
1257 236 : auth_macs = wps_authorized_macs(reg, &count);
1258 :
1259 236 : wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1260 :
1261 472 : if (wps_build_version(beacon) ||
1262 472 : wps_build_wps_state(reg->wps, beacon) ||
1263 472 : wps_build_ap_setup_locked(reg->wps, beacon) ||
1264 472 : wps_build_selected_registrar(reg, beacon) ||
1265 472 : wps_build_sel_reg_dev_password_id(reg, beacon) ||
1266 472 : wps_build_sel_reg_config_methods(reg, beacon) ||
1267 472 : wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1268 483 : (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) ||
1269 472 : wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1270 236 : wps_build_vendor_ext(®->wps->dev, beacon)) {
1271 0 : wpabuf_free(beacon);
1272 0 : wpabuf_free(probe);
1273 0 : return -1;
1274 : }
1275 :
1276 : #ifdef CONFIG_P2P
1277 : if (wps_build_dev_name(®->wps->dev, beacon) ||
1278 : wps_build_primary_dev_type(®->wps->dev, beacon)) {
1279 : wpabuf_free(beacon);
1280 : wpabuf_free(probe);
1281 : return -1;
1282 : }
1283 : #endif /* CONFIG_P2P */
1284 :
1285 236 : wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1286 :
1287 472 : if (wps_build_version(probe) ||
1288 472 : wps_build_wps_state(reg->wps, probe) ||
1289 472 : wps_build_ap_setup_locked(reg->wps, probe) ||
1290 472 : wps_build_selected_registrar(reg, probe) ||
1291 472 : wps_build_sel_reg_dev_password_id(reg, probe) ||
1292 472 : wps_build_sel_reg_config_methods(reg, probe) ||
1293 236 : wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1294 236 : WPS_RESP_REGISTRAR) ||
1295 472 : wps_build_uuid_e(probe, reg->wps->uuid) ||
1296 472 : wps_build_device_attrs(®->wps->dev, probe) ||
1297 472 : wps_build_probe_config_methods(reg, probe) ||
1298 483 : (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) ||
1299 472 : wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1300 236 : wps_build_vendor_ext(®->wps->dev, probe)) {
1301 0 : wpabuf_free(beacon);
1302 0 : wpabuf_free(probe);
1303 0 : return -1;
1304 : }
1305 :
1306 236 : beacon = wps_ie_encapsulate(beacon);
1307 236 : probe = wps_ie_encapsulate(probe);
1308 :
1309 236 : if (!beacon || !probe) {
1310 0 : wpabuf_free(beacon);
1311 0 : wpabuf_free(probe);
1312 0 : return -1;
1313 : }
1314 :
1315 236 : if (reg->static_wep_only) {
1316 : /*
1317 : * Windows XP and Vista clients can get confused about
1318 : * EAP-Identity/Request when they probe the network with
1319 : * EAPOL-Start. In such a case, they may assume the network is
1320 : * using IEEE 802.1X and prompt user for a certificate while
1321 : * the correct (non-WPS) behavior would be to ask for the
1322 : * static WEP key. As a workaround, use Microsoft Provisioning
1323 : * IE to advertise that legacy 802.1X is not supported.
1324 : */
1325 0 : const u8 ms_wps[7] = {
1326 : WLAN_EID_VENDOR_SPECIFIC, 5,
1327 : /* Microsoft Provisioning IE (00:50:f2:5) */
1328 : 0x00, 0x50, 0xf2, 5,
1329 : 0x00 /* no legacy 802.1X or MS WPS */
1330 : };
1331 0 : wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1332 : "into Beacon/Probe Response frames");
1333 0 : wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1334 0 : wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1335 : }
1336 :
1337 236 : return wps_cb_set_ie(reg, beacon, probe);
1338 : }
1339 :
1340 :
1341 49 : static int wps_get_dev_password(struct wps_data *wps)
1342 : {
1343 : const u8 *pin;
1344 49 : size_t pin_len = 0;
1345 :
1346 49 : bin_clear_free(wps->dev_password, wps->dev_password_len);
1347 49 : wps->dev_password = NULL;
1348 :
1349 49 : if (wps->pbc) {
1350 20 : wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1351 20 : pin = (const u8 *) "00000000";
1352 20 : pin_len = 8;
1353 : #ifdef CONFIG_WPS_NFC
1354 29 : } else if (wps->nfc_pw_token) {
1355 8 : if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
1356 : {
1357 6 : wpa_printf(MSG_DEBUG, "WPS: Using NFC connection "
1358 : "handover and abbreviated WPS handshake "
1359 : "without Device Password");
1360 6 : return 0;
1361 : }
1362 2 : wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1363 : "Password Token");
1364 2 : pin = wps->nfc_pw_token->dev_pw;
1365 2 : pin_len = wps->nfc_pw_token->dev_pw_len;
1366 22 : } else if (wps->dev_pw_id >= 0x10 &&
1367 1 : wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
1368 0 : wps->wps->ap_nfc_dev_pw) {
1369 0 : wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token");
1370 0 : pin = wpabuf_head(wps->wps->ap_nfc_dev_pw);
1371 0 : pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw);
1372 : #endif /* CONFIG_WPS_NFC */
1373 : } else {
1374 21 : pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1375 : &pin_len);
1376 21 : if (pin && wps->dev_pw_id >= 0x10) {
1377 0 : wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device "
1378 : "Password ID, but PIN found");
1379 : /*
1380 : * See whether Enrollee is willing to use PIN instead.
1381 : */
1382 0 : wps->dev_pw_id = DEV_PW_DEFAULT;
1383 : }
1384 : }
1385 43 : if (pin == NULL) {
1386 10 : wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1387 : "the Enrollee (context %p registrar %p)",
1388 10 : wps->wps, wps->wps->registrar);
1389 10 : wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1390 10 : &wps->peer_dev);
1391 10 : return -1;
1392 : }
1393 :
1394 33 : wps->dev_password = os_malloc(pin_len);
1395 33 : if (wps->dev_password == NULL)
1396 0 : return -1;
1397 33 : os_memcpy(wps->dev_password, pin, pin_len);
1398 33 : wps->dev_password_len = pin_len;
1399 :
1400 33 : return 0;
1401 : }
1402 :
1403 :
1404 53 : static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1405 : {
1406 53 : wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1407 53 : wpabuf_put_be16(msg, ATTR_UUID_R);
1408 53 : wpabuf_put_be16(msg, WPS_UUID_LEN);
1409 53 : wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1410 53 : return 0;
1411 : }
1412 :
1413 :
1414 33 : static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1415 : {
1416 : u8 *hash;
1417 : const u8 *addr[4];
1418 : size_t len[4];
1419 :
1420 33 : if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1421 0 : return -1;
1422 33 : wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1423 33 : wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1424 33 : wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1425 :
1426 33 : if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1427 0 : wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1428 : "R-Hash derivation");
1429 0 : return -1;
1430 : }
1431 :
1432 33 : wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1433 33 : wpabuf_put_be16(msg, ATTR_R_HASH1);
1434 33 : wpabuf_put_be16(msg, SHA256_MAC_LEN);
1435 33 : hash = wpabuf_put(msg, SHA256_MAC_LEN);
1436 : /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1437 33 : addr[0] = wps->snonce;
1438 33 : len[0] = WPS_SECRET_NONCE_LEN;
1439 33 : addr[1] = wps->psk1;
1440 33 : len[1] = WPS_PSK_LEN;
1441 33 : addr[2] = wpabuf_head(wps->dh_pubkey_e);
1442 33 : len[2] = wpabuf_len(wps->dh_pubkey_e);
1443 33 : addr[3] = wpabuf_head(wps->dh_pubkey_r);
1444 33 : len[3] = wpabuf_len(wps->dh_pubkey_r);
1445 33 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1446 33 : wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1447 :
1448 33 : wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1449 33 : wpabuf_put_be16(msg, ATTR_R_HASH2);
1450 33 : wpabuf_put_be16(msg, SHA256_MAC_LEN);
1451 33 : hash = wpabuf_put(msg, SHA256_MAC_LEN);
1452 : /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1453 33 : addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1454 33 : addr[1] = wps->psk2;
1455 33 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1456 33 : wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1457 :
1458 33 : return 0;
1459 : }
1460 :
1461 :
1462 33 : static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1463 : {
1464 33 : wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1465 33 : wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1466 33 : wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1467 33 : wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1468 33 : return 0;
1469 : }
1470 :
1471 :
1472 32 : static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1473 : {
1474 32 : wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1475 32 : wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1476 32 : wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1477 32 : wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1478 : WPS_SECRET_NONCE_LEN);
1479 32 : return 0;
1480 : }
1481 :
1482 :
1483 37 : static int wps_build_cred_network_idx(struct wpabuf *msg,
1484 : const struct wps_credential *cred)
1485 : {
1486 37 : wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1487 37 : wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1488 37 : wpabuf_put_be16(msg, 1);
1489 37 : wpabuf_put_u8(msg, 1);
1490 37 : return 0;
1491 : }
1492 :
1493 :
1494 37 : static int wps_build_cred_ssid(struct wpabuf *msg,
1495 : const struct wps_credential *cred)
1496 : {
1497 37 : wpa_printf(MSG_DEBUG, "WPS: * SSID");
1498 74 : wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1499 37 : cred->ssid, cred->ssid_len);
1500 37 : wpabuf_put_be16(msg, ATTR_SSID);
1501 37 : wpabuf_put_be16(msg, cred->ssid_len);
1502 37 : wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1503 37 : return 0;
1504 : }
1505 :
1506 :
1507 37 : static int wps_build_cred_auth_type(struct wpabuf *msg,
1508 : const struct wps_credential *cred)
1509 : {
1510 37 : wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1511 37 : cred->auth_type);
1512 37 : wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1513 37 : wpabuf_put_be16(msg, 2);
1514 37 : wpabuf_put_be16(msg, cred->auth_type);
1515 37 : return 0;
1516 : }
1517 :
1518 :
1519 37 : static int wps_build_cred_encr_type(struct wpabuf *msg,
1520 : const struct wps_credential *cred)
1521 : {
1522 37 : wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1523 37 : cred->encr_type);
1524 37 : wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1525 37 : wpabuf_put_be16(msg, 2);
1526 37 : wpabuf_put_be16(msg, cred->encr_type);
1527 37 : return 0;
1528 : }
1529 :
1530 :
1531 37 : static int wps_build_cred_network_key(struct wpabuf *msg,
1532 : const struct wps_credential *cred)
1533 : {
1534 37 : wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1535 37 : (int) cred->key_len);
1536 74 : wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1537 37 : cred->key, cred->key_len);
1538 37 : wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1539 37 : wpabuf_put_be16(msg, cred->key_len);
1540 37 : wpabuf_put_data(msg, cred->key, cred->key_len);
1541 37 : return 0;
1542 : }
1543 :
1544 :
1545 37 : static int wps_build_credential(struct wpabuf *msg,
1546 : const struct wps_credential *cred)
1547 : {
1548 74 : if (wps_build_cred_network_idx(msg, cred) ||
1549 74 : wps_build_cred_ssid(msg, cred) ||
1550 74 : wps_build_cred_auth_type(msg, cred) ||
1551 74 : wps_build_cred_encr_type(msg, cred) ||
1552 74 : wps_build_cred_network_key(msg, cred) ||
1553 37 : wps_build_mac_addr(msg, cred->mac_addr))
1554 0 : return -1;
1555 37 : return 0;
1556 : }
1557 :
1558 :
1559 0 : int wps_build_credential_wrap(struct wpabuf *msg,
1560 : const struct wps_credential *cred)
1561 : {
1562 : struct wpabuf *wbuf;
1563 0 : wbuf = wpabuf_alloc(200);
1564 0 : if (wbuf == NULL)
1565 0 : return -1;
1566 0 : if (wps_build_credential(wbuf, cred)) {
1567 0 : wpabuf_free(wbuf);
1568 0 : return -1;
1569 : }
1570 0 : wpabuf_put_be16(msg, ATTR_CRED);
1571 0 : wpabuf_put_be16(msg, wpabuf_len(wbuf));
1572 0 : wpabuf_put_buf(msg, wbuf);
1573 0 : wpabuf_free(wbuf);
1574 0 : return 0;
1575 : }
1576 :
1577 :
1578 39 : int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1579 : {
1580 : struct wpabuf *cred;
1581 :
1582 39 : if (wps->wps->registrar->skip_cred_build)
1583 2 : goto skip_cred_build;
1584 :
1585 37 : wpa_printf(MSG_DEBUG, "WPS: * Credential");
1586 37 : if (wps->use_cred) {
1587 0 : os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1588 0 : goto use_provided;
1589 : }
1590 37 : os_memset(&wps->cred, 0, sizeof(wps->cred));
1591 :
1592 37 : os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1593 37 : wps->cred.ssid_len = wps->wps->ssid_len;
1594 :
1595 : /* Select the best authentication and encryption type */
1596 37 : if (wps->auth_type & WPS_AUTH_WPA2PSK)
1597 37 : wps->auth_type = WPS_AUTH_WPA2PSK;
1598 0 : else if (wps->auth_type & WPS_AUTH_WPAPSK)
1599 0 : wps->auth_type = WPS_AUTH_WPAPSK;
1600 0 : else if (wps->auth_type & WPS_AUTH_OPEN)
1601 0 : wps->auth_type = WPS_AUTH_OPEN;
1602 : else {
1603 0 : wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1604 0 : wps->auth_type);
1605 0 : return -1;
1606 : }
1607 37 : wps->cred.auth_type = wps->auth_type;
1608 :
1609 37 : if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1610 0 : wps->auth_type == WPS_AUTH_WPAPSK) {
1611 74 : if (wps->encr_type & WPS_ENCR_AES)
1612 37 : wps->encr_type = WPS_ENCR_AES;
1613 0 : else if (wps->encr_type & WPS_ENCR_TKIP)
1614 0 : wps->encr_type = WPS_ENCR_TKIP;
1615 : else {
1616 0 : wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1617 : "type for WPA/WPA2");
1618 0 : return -1;
1619 : }
1620 : } else {
1621 0 : if (wps->encr_type & WPS_ENCR_NONE)
1622 0 : wps->encr_type = WPS_ENCR_NONE;
1623 : #ifdef CONFIG_TESTING_OPTIONS
1624 0 : else if (wps->encr_type & WPS_ENCR_WEP)
1625 0 : wps->encr_type = WPS_ENCR_WEP;
1626 : #endif /* CONFIG_TESTING_OPTIONS */
1627 : else {
1628 0 : wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1629 : "type for non-WPA/WPA2 mode");
1630 0 : return -1;
1631 : }
1632 : }
1633 37 : wps->cred.encr_type = wps->encr_type;
1634 : /*
1635 : * Set MAC address in the Credential to be the Enrollee's MAC address
1636 : */
1637 37 : os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1638 :
1639 44 : if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1640 14 : !wps->wps->registrar->disable_auto_conf) {
1641 : u8 r[16];
1642 : /* Generate a random passphrase */
1643 7 : if (random_pool_ready() != 1 ||
1644 7 : random_get_bytes(r, sizeof(r)) < 0) {
1645 0 : wpa_printf(MSG_INFO,
1646 : "WPS: Could not generate random PSK");
1647 0 : return -1;
1648 : }
1649 7 : os_free(wps->new_psk);
1650 7 : wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1651 7 : if (wps->new_psk == NULL)
1652 0 : return -1;
1653 7 : wps->new_psk_len--; /* remove newline */
1654 49 : while (wps->new_psk_len &&
1655 21 : wps->new_psk[wps->new_psk_len - 1] == '=')
1656 14 : wps->new_psk_len--;
1657 14 : wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1658 7 : wps->new_psk, wps->new_psk_len);
1659 7 : os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1660 7 : wps->cred.key_len = wps->new_psk_len;
1661 60 : } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1662 30 : wps->use_psk_key && wps->wps->psk_set) {
1663 : char hex[65];
1664 0 : wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1665 0 : wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1666 0 : os_memcpy(wps->cred.key, hex, 32 * 2);
1667 0 : wps->cred.key_len = 32 * 2;
1668 60 : } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1669 30 : wps->wps->network_key) {
1670 26 : os_memcpy(wps->cred.key, wps->wps->network_key,
1671 : wps->wps->network_key_len);
1672 26 : wps->cred.key_len = wps->wps->network_key_len;
1673 4 : } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1674 : char hex[65];
1675 : /* Generate a random per-device PSK */
1676 4 : os_free(wps->new_psk);
1677 4 : wps->new_psk_len = 32;
1678 4 : wps->new_psk = os_malloc(wps->new_psk_len);
1679 4 : if (wps->new_psk == NULL)
1680 0 : return -1;
1681 4 : if (random_pool_ready() != 1 ||
1682 4 : random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1683 0 : wpa_printf(MSG_INFO,
1684 : "WPS: Could not generate random PSK");
1685 0 : os_free(wps->new_psk);
1686 0 : wps->new_psk = NULL;
1687 0 : return -1;
1688 : }
1689 8 : wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1690 4 : wps->new_psk, wps->new_psk_len);
1691 4 : wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1692 : wps->new_psk_len);
1693 4 : os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1694 4 : wps->cred.key_len = wps->new_psk_len * 2;
1695 : }
1696 :
1697 : use_provided:
1698 : #ifdef CONFIG_WPS_TESTING
1699 37 : if (wps_testing_dummy_cred)
1700 0 : cred = wpabuf_alloc(200);
1701 : else
1702 37 : cred = NULL;
1703 37 : if (cred) {
1704 : struct wps_credential dummy;
1705 0 : wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1706 0 : os_memset(&dummy, 0, sizeof(dummy));
1707 0 : os_memcpy(dummy.ssid, "dummy", 5);
1708 0 : dummy.ssid_len = 5;
1709 0 : dummy.auth_type = WPS_AUTH_WPA2PSK;
1710 0 : dummy.encr_type = WPS_ENCR_AES;
1711 0 : os_memcpy(dummy.key, "dummy psk", 9);
1712 0 : dummy.key_len = 9;
1713 0 : os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1714 0 : wps_build_credential(cred, &dummy);
1715 0 : wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1716 :
1717 0 : wpabuf_put_be16(msg, ATTR_CRED);
1718 0 : wpabuf_put_be16(msg, wpabuf_len(cred));
1719 0 : wpabuf_put_buf(msg, cred);
1720 :
1721 0 : wpabuf_free(cred);
1722 : }
1723 : #endif /* CONFIG_WPS_TESTING */
1724 :
1725 37 : cred = wpabuf_alloc(200);
1726 37 : if (cred == NULL)
1727 0 : return -1;
1728 :
1729 37 : if (wps_build_credential(cred, &wps->cred)) {
1730 0 : wpabuf_free(cred);
1731 0 : return -1;
1732 : }
1733 :
1734 37 : wpabuf_put_be16(msg, ATTR_CRED);
1735 37 : wpabuf_put_be16(msg, wpabuf_len(cred));
1736 37 : wpabuf_put_buf(msg, cred);
1737 37 : wpabuf_free(cred);
1738 :
1739 : skip_cred_build:
1740 39 : if (wps->wps->registrar->extra_cred) {
1741 2 : wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1742 2 : wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1743 : }
1744 :
1745 39 : return 0;
1746 : }
1747 :
1748 :
1749 0 : static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1750 : {
1751 0 : wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1752 :
1753 0 : if (wps_build_credential(msg, &wps->cred))
1754 0 : return -1;
1755 :
1756 0 : return 0;
1757 : }
1758 :
1759 :
1760 0 : static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1761 : {
1762 : struct wpabuf *msg, *plain;
1763 :
1764 0 : msg = wpabuf_alloc(1000);
1765 0 : if (msg == NULL)
1766 0 : return NULL;
1767 :
1768 0 : plain = wpabuf_alloc(200);
1769 0 : if (plain == NULL) {
1770 0 : wpabuf_free(msg);
1771 0 : return NULL;
1772 : }
1773 :
1774 0 : if (wps_build_ap_settings(wps, plain)) {
1775 0 : wpabuf_free(plain);
1776 0 : wpabuf_free(msg);
1777 0 : return NULL;
1778 : }
1779 :
1780 0 : wpabuf_put_be16(msg, ATTR_CRED);
1781 0 : wpabuf_put_be16(msg, wpabuf_len(plain));
1782 0 : wpabuf_put_buf(msg, plain);
1783 0 : wpabuf_free(plain);
1784 :
1785 0 : return msg;
1786 : }
1787 :
1788 :
1789 39 : static struct wpabuf * wps_build_m2(struct wps_data *wps)
1790 : {
1791 : struct wpabuf *msg;
1792 39 : int config_in_m2 = 0;
1793 :
1794 39 : if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1795 0 : return NULL;
1796 39 : wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1797 39 : wps->nonce_r, WPS_NONCE_LEN);
1798 39 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1799 :
1800 39 : wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1801 39 : msg = wpabuf_alloc(1000);
1802 39 : if (msg == NULL)
1803 0 : return NULL;
1804 :
1805 78 : if (wps_build_version(msg) ||
1806 78 : wps_build_msg_type(msg, WPS_M2) ||
1807 78 : wps_build_enrollee_nonce(wps, msg) ||
1808 78 : wps_build_registrar_nonce(wps, msg) ||
1809 78 : wps_build_uuid_r(wps, msg) ||
1810 78 : wps_build_public_key(wps, msg) ||
1811 78 : wps_derive_keys(wps) ||
1812 78 : wps_build_auth_type_flags(wps, msg) ||
1813 78 : wps_build_encr_type_flags(wps, msg) ||
1814 78 : wps_build_conn_type_flags(wps, msg) ||
1815 78 : wps_build_config_methods_r(wps->wps->registrar, msg) ||
1816 78 : wps_build_device_attrs(&wps->wps->dev, msg) ||
1817 39 : wps_build_rf_bands(&wps->wps->dev, msg,
1818 78 : wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1819 78 : wps_build_assoc_state(wps, msg) ||
1820 78 : wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1821 78 : wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1822 78 : wps_build_os_version(&wps->wps->dev, msg) ||
1823 39 : wps_build_wfa_ext(msg, 0, NULL, 0)) {
1824 0 : wpabuf_free(msg);
1825 0 : return NULL;
1826 : }
1827 :
1828 : #ifdef CONFIG_WPS_NFC
1829 45 : if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1830 6 : wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1831 : /*
1832 : * Use abbreviated handshake since public key hash allowed
1833 : * Enrollee to validate our public key similarly to how Enrollee
1834 : * public key was validated. There is no need to validate Device
1835 : * Password in this case.
1836 : */
1837 6 : struct wpabuf *plain = wpabuf_alloc(500);
1838 12 : if (plain == NULL ||
1839 12 : wps_build_cred(wps, plain) ||
1840 12 : wps_build_key_wrap_auth(wps, plain) ||
1841 6 : wps_build_encr_settings(wps, msg, plain)) {
1842 0 : wpabuf_free(msg);
1843 0 : wpabuf_free(plain);
1844 0 : return NULL;
1845 : }
1846 6 : wpabuf_free(plain);
1847 6 : config_in_m2 = 1;
1848 : }
1849 : #endif /* CONFIG_WPS_NFC */
1850 :
1851 39 : if (wps_build_authenticator(wps, msg)) {
1852 0 : wpabuf_free(msg);
1853 0 : return NULL;
1854 : }
1855 :
1856 39 : wps->int_reg = 1;
1857 39 : wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1858 39 : return msg;
1859 : }
1860 :
1861 :
1862 14 : static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1863 : {
1864 : struct wpabuf *msg;
1865 14 : u16 err = wps->config_error;
1866 :
1867 14 : wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1868 14 : msg = wpabuf_alloc(1000);
1869 14 : if (msg == NULL)
1870 0 : return NULL;
1871 :
1872 14 : if (wps->wps->ap && wps->wps->ap_setup_locked &&
1873 : err == WPS_CFG_NO_ERROR)
1874 0 : err = WPS_CFG_SETUP_LOCKED;
1875 :
1876 28 : if (wps_build_version(msg) ||
1877 28 : wps_build_msg_type(msg, WPS_M2D) ||
1878 28 : wps_build_enrollee_nonce(wps, msg) ||
1879 28 : wps_build_registrar_nonce(wps, msg) ||
1880 28 : wps_build_uuid_r(wps, msg) ||
1881 28 : wps_build_auth_type_flags(wps, msg) ||
1882 28 : wps_build_encr_type_flags(wps, msg) ||
1883 28 : wps_build_conn_type_flags(wps, msg) ||
1884 28 : wps_build_config_methods_r(wps->wps->registrar, msg) ||
1885 28 : wps_build_device_attrs(&wps->wps->dev, msg) ||
1886 14 : wps_build_rf_bands(&wps->wps->dev, msg,
1887 28 : wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1888 28 : wps_build_assoc_state(wps, msg) ||
1889 28 : wps_build_config_error(msg, err) ||
1890 28 : wps_build_os_version(&wps->wps->dev, msg) ||
1891 14 : wps_build_wfa_ext(msg, 0, NULL, 0)) {
1892 0 : wpabuf_free(msg);
1893 0 : return NULL;
1894 : }
1895 :
1896 14 : wps->state = RECV_M2D_ACK;
1897 14 : return msg;
1898 : }
1899 :
1900 :
1901 33 : static struct wpabuf * wps_build_m4(struct wps_data *wps)
1902 : {
1903 : struct wpabuf *msg, *plain;
1904 :
1905 33 : wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1906 :
1907 33 : wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1908 :
1909 33 : plain = wpabuf_alloc(200);
1910 33 : if (plain == NULL)
1911 0 : return NULL;
1912 :
1913 33 : msg = wpabuf_alloc(1000);
1914 33 : if (msg == NULL) {
1915 0 : wpabuf_free(plain);
1916 0 : return NULL;
1917 : }
1918 :
1919 66 : if (wps_build_version(msg) ||
1920 66 : wps_build_msg_type(msg, WPS_M4) ||
1921 66 : wps_build_enrollee_nonce(wps, msg) ||
1922 66 : wps_build_r_hash(wps, msg) ||
1923 66 : wps_build_r_snonce1(wps, plain) ||
1924 66 : wps_build_key_wrap_auth(wps, plain) ||
1925 66 : wps_build_encr_settings(wps, msg, plain) ||
1926 66 : wps_build_wfa_ext(msg, 0, NULL, 0) ||
1927 33 : wps_build_authenticator(wps, msg)) {
1928 0 : wpabuf_free(plain);
1929 0 : wpabuf_free(msg);
1930 0 : return NULL;
1931 : }
1932 33 : wpabuf_free(plain);
1933 :
1934 33 : wps->state = RECV_M5;
1935 33 : return msg;
1936 : }
1937 :
1938 :
1939 32 : static struct wpabuf * wps_build_m6(struct wps_data *wps)
1940 : {
1941 : struct wpabuf *msg, *plain;
1942 :
1943 32 : wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1944 :
1945 32 : plain = wpabuf_alloc(200);
1946 32 : if (plain == NULL)
1947 0 : return NULL;
1948 :
1949 32 : msg = wpabuf_alloc(1000);
1950 32 : if (msg == NULL) {
1951 0 : wpabuf_free(plain);
1952 0 : return NULL;
1953 : }
1954 :
1955 64 : if (wps_build_version(msg) ||
1956 64 : wps_build_msg_type(msg, WPS_M6) ||
1957 64 : wps_build_enrollee_nonce(wps, msg) ||
1958 64 : wps_build_r_snonce2(wps, plain) ||
1959 64 : wps_build_key_wrap_auth(wps, plain) ||
1960 64 : wps_build_encr_settings(wps, msg, plain) ||
1961 64 : wps_build_wfa_ext(msg, 0, NULL, 0) ||
1962 32 : wps_build_authenticator(wps, msg)) {
1963 0 : wpabuf_free(plain);
1964 0 : wpabuf_free(msg);
1965 0 : return NULL;
1966 : }
1967 32 : wpabuf_free(plain);
1968 :
1969 32 : wps->wps_pin_revealed = 1;
1970 32 : wps->state = RECV_M7;
1971 32 : return msg;
1972 : }
1973 :
1974 :
1975 31 : static struct wpabuf * wps_build_m8(struct wps_data *wps)
1976 : {
1977 : struct wpabuf *msg, *plain;
1978 :
1979 31 : wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1980 :
1981 31 : plain = wpabuf_alloc(500);
1982 31 : if (plain == NULL)
1983 0 : return NULL;
1984 :
1985 31 : msg = wpabuf_alloc(1000);
1986 31 : if (msg == NULL) {
1987 0 : wpabuf_free(plain);
1988 0 : return NULL;
1989 : }
1990 :
1991 62 : if (wps_build_version(msg) ||
1992 62 : wps_build_msg_type(msg, WPS_M8) ||
1993 62 : wps_build_enrollee_nonce(wps, msg) ||
1994 62 : ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1995 62 : (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1996 62 : wps_build_key_wrap_auth(wps, plain) ||
1997 62 : wps_build_encr_settings(wps, msg, plain) ||
1998 62 : wps_build_wfa_ext(msg, 0, NULL, 0) ||
1999 31 : wps_build_authenticator(wps, msg)) {
2000 0 : wpabuf_free(plain);
2001 0 : wpabuf_free(msg);
2002 0 : return NULL;
2003 : }
2004 31 : wpabuf_free(plain);
2005 :
2006 31 : wps->state = RECV_DONE;
2007 31 : return msg;
2008 : }
2009 :
2010 :
2011 172 : struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2012 : enum wsc_op_code *op_code)
2013 : {
2014 : struct wpabuf *msg;
2015 :
2016 : #ifdef CONFIG_WPS_UPNP
2017 172 : if (!wps->int_reg && wps->wps->wps_upnp) {
2018 31 : struct upnp_pending_message *p, *prev = NULL;
2019 31 : if (wps->ext_reg > 1)
2020 15 : wps_registrar_free_pending_m2(wps->wps);
2021 31 : p = wps->wps->upnp_msgs;
2022 : /* TODO: check pending message MAC address */
2023 62 : while (p && p->next) {
2024 0 : prev = p;
2025 0 : p = p->next;
2026 : }
2027 31 : if (p) {
2028 23 : wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2029 : "UPnP");
2030 23 : if (prev)
2031 0 : prev->next = NULL;
2032 : else
2033 23 : wps->wps->upnp_msgs = NULL;
2034 23 : msg = p->msg;
2035 23 : switch (p->type) {
2036 : case WPS_WSC_ACK:
2037 0 : *op_code = WSC_ACK;
2038 0 : break;
2039 : case WPS_WSC_NACK:
2040 0 : *op_code = WSC_NACK;
2041 0 : break;
2042 : default:
2043 23 : *op_code = WSC_MSG;
2044 23 : break;
2045 : }
2046 23 : os_free(p);
2047 23 : if (wps->ext_reg == 0)
2048 0 : wps->ext_reg = 1;
2049 23 : return msg;
2050 : }
2051 : }
2052 149 : if (wps->ext_reg) {
2053 0 : wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2054 : "pending message available");
2055 0 : return NULL;
2056 : }
2057 : #endif /* CONFIG_WPS_UPNP */
2058 :
2059 149 : switch (wps->state) {
2060 : case SEND_M2:
2061 49 : if (wps_get_dev_password(wps) < 0)
2062 10 : msg = wps_build_m2d(wps);
2063 : else
2064 39 : msg = wps_build_m2(wps);
2065 49 : *op_code = WSC_MSG;
2066 49 : break;
2067 : case SEND_M2D:
2068 4 : msg = wps_build_m2d(wps);
2069 4 : *op_code = WSC_MSG;
2070 4 : break;
2071 : case SEND_M4:
2072 33 : msg = wps_build_m4(wps);
2073 33 : *op_code = WSC_MSG;
2074 33 : break;
2075 : case SEND_M6:
2076 32 : msg = wps_build_m6(wps);
2077 32 : *op_code = WSC_MSG;
2078 32 : break;
2079 : case SEND_M8:
2080 31 : msg = wps_build_m8(wps);
2081 31 : *op_code = WSC_MSG;
2082 31 : break;
2083 : case RECV_DONE:
2084 0 : msg = wps_build_wsc_ack(wps);
2085 0 : *op_code = WSC_ACK;
2086 0 : break;
2087 : case SEND_WSC_NACK:
2088 0 : msg = wps_build_wsc_nack(wps);
2089 0 : *op_code = WSC_NACK;
2090 0 : break;
2091 : default:
2092 0 : wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2093 0 : "a message", wps->state);
2094 0 : msg = NULL;
2095 0 : break;
2096 : }
2097 :
2098 149 : if (*op_code == WSC_MSG && msg) {
2099 : /* Save a copy of the last message for Authenticator derivation
2100 : */
2101 149 : wpabuf_free(wps->last_msg);
2102 149 : wps->last_msg = wpabuf_dup(msg);
2103 : }
2104 :
2105 149 : return msg;
2106 : }
2107 :
2108 :
2109 53 : static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2110 : {
2111 53 : if (e_nonce == NULL) {
2112 0 : wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2113 0 : return -1;
2114 : }
2115 :
2116 53 : os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2117 53 : wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2118 53 : wps->nonce_e, WPS_NONCE_LEN);
2119 :
2120 53 : return 0;
2121 : }
2122 :
2123 :
2124 96 : static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2125 : {
2126 96 : if (r_nonce == NULL) {
2127 0 : wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2128 0 : return -1;
2129 : }
2130 :
2131 96 : if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2132 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2133 0 : return -1;
2134 : }
2135 :
2136 96 : return 0;
2137 : }
2138 :
2139 :
2140 53 : static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2141 : {
2142 53 : if (uuid_e == NULL) {
2143 0 : wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2144 0 : return -1;
2145 : }
2146 :
2147 53 : os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2148 53 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2149 :
2150 53 : return 0;
2151 : }
2152 :
2153 :
2154 53 : static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2155 : {
2156 53 : if (pw_id == NULL) {
2157 0 : wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2158 0 : return -1;
2159 : }
2160 :
2161 53 : wps->dev_pw_id = WPA_GET_BE16(pw_id);
2162 53 : wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2163 :
2164 53 : return 0;
2165 : }
2166 :
2167 :
2168 33 : static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2169 : {
2170 33 : if (e_hash1 == NULL) {
2171 0 : wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2172 0 : return -1;
2173 : }
2174 :
2175 33 : os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2176 33 : wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2177 :
2178 33 : return 0;
2179 : }
2180 :
2181 :
2182 33 : static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2183 : {
2184 33 : if (e_hash2 == NULL) {
2185 0 : wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2186 0 : return -1;
2187 : }
2188 :
2189 33 : os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2190 33 : wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2191 :
2192 33 : return 0;
2193 : }
2194 :
2195 :
2196 32 : static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2197 : {
2198 : u8 hash[SHA256_MAC_LEN];
2199 : const u8 *addr[4];
2200 : size_t len[4];
2201 :
2202 32 : if (e_snonce1 == NULL) {
2203 0 : wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2204 0 : return -1;
2205 : }
2206 :
2207 32 : wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2208 : WPS_SECRET_NONCE_LEN);
2209 :
2210 : /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2211 32 : addr[0] = e_snonce1;
2212 32 : len[0] = WPS_SECRET_NONCE_LEN;
2213 32 : addr[1] = wps->psk1;
2214 32 : len[1] = WPS_PSK_LEN;
2215 32 : addr[2] = wpabuf_head(wps->dh_pubkey_e);
2216 32 : len[2] = wpabuf_len(wps->dh_pubkey_e);
2217 32 : addr[3] = wpabuf_head(wps->dh_pubkey_r);
2218 32 : len[3] = wpabuf_len(wps->dh_pubkey_r);
2219 32 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2220 :
2221 32 : if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2222 0 : wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2223 : "not match with the pre-committed value");
2224 0 : wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2225 0 : wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2226 0 : return -1;
2227 : }
2228 :
2229 32 : wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2230 : "half of the device password");
2231 :
2232 32 : return 0;
2233 : }
2234 :
2235 :
2236 31 : static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2237 : {
2238 : u8 hash[SHA256_MAC_LEN];
2239 : const u8 *addr[4];
2240 : size_t len[4];
2241 :
2242 31 : if (e_snonce2 == NULL) {
2243 0 : wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2244 0 : return -1;
2245 : }
2246 :
2247 31 : wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2248 : WPS_SECRET_NONCE_LEN);
2249 :
2250 : /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2251 31 : addr[0] = e_snonce2;
2252 31 : len[0] = WPS_SECRET_NONCE_LEN;
2253 31 : addr[1] = wps->psk2;
2254 31 : len[1] = WPS_PSK_LEN;
2255 31 : addr[2] = wpabuf_head(wps->dh_pubkey_e);
2256 31 : len[2] = wpabuf_len(wps->dh_pubkey_e);
2257 31 : addr[3] = wpabuf_head(wps->dh_pubkey_r);
2258 31 : len[3] = wpabuf_len(wps->dh_pubkey_r);
2259 31 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2260 :
2261 31 : if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2262 0 : wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2263 : "not match with the pre-committed value");
2264 0 : wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2265 0 : wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2266 0 : wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2267 0 : return -1;
2268 : }
2269 :
2270 31 : wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2271 : "half of the device password");
2272 31 : wps->wps_pin_revealed = 0;
2273 31 : wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2274 :
2275 : /*
2276 : * In case wildcard PIN is used and WPS handshake succeeds in the first
2277 : * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2278 : * sure the PIN gets invalidated here.
2279 : */
2280 31 : wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2281 :
2282 31 : return 0;
2283 : }
2284 :
2285 :
2286 53 : static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2287 : {
2288 53 : if (mac_addr == NULL) {
2289 0 : wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2290 0 : return -1;
2291 : }
2292 :
2293 318 : wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2294 318 : MAC2STR(mac_addr));
2295 53 : os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2296 53 : os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2297 :
2298 53 : return 0;
2299 : }
2300 :
2301 :
2302 53 : static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2303 : size_t pk_len)
2304 : {
2305 53 : if (pk == NULL || pk_len == 0) {
2306 0 : wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2307 0 : return -1;
2308 : }
2309 :
2310 53 : wpabuf_free(wps->dh_pubkey_e);
2311 53 : wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2312 53 : if (wps->dh_pubkey_e == NULL)
2313 0 : return -1;
2314 :
2315 53 : return 0;
2316 : }
2317 :
2318 :
2319 53 : static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2320 : {
2321 : u16 auth_types;
2322 :
2323 53 : if (auth == NULL) {
2324 0 : wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2325 : "received");
2326 0 : return -1;
2327 : }
2328 :
2329 53 : auth_types = WPA_GET_BE16(auth);
2330 :
2331 53 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2332 : auth_types);
2333 53 : wps->auth_type = wps->wps->auth_types & auth_types;
2334 53 : if (wps->auth_type == 0) {
2335 0 : wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2336 : "authentication types (own 0x%x Enrollee 0x%x)",
2337 0 : wps->wps->auth_types, auth_types);
2338 : #ifdef WPS_WORKAROUNDS
2339 : /*
2340 : * Some deployed implementations seem to advertise incorrect
2341 : * information in this attribute. For example, Linksys WRT350N
2342 : * seems to have a byteorder bug that breaks this negotiation.
2343 : * In order to interoperate with existing implementations,
2344 : * assume that the Enrollee supports everything we do.
2345 : */
2346 0 : wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2347 : "does not advertise supported authentication types "
2348 : "correctly");
2349 0 : wps->auth_type = wps->wps->auth_types;
2350 : #else /* WPS_WORKAROUNDS */
2351 : return -1;
2352 : #endif /* WPS_WORKAROUNDS */
2353 : }
2354 :
2355 53 : return 0;
2356 : }
2357 :
2358 :
2359 53 : static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2360 : {
2361 : u16 encr_types;
2362 :
2363 53 : if (encr == NULL) {
2364 0 : wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2365 : "received");
2366 0 : return -1;
2367 : }
2368 :
2369 53 : encr_types = WPA_GET_BE16(encr);
2370 :
2371 53 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2372 : encr_types);
2373 53 : wps->encr_type = wps->wps->encr_types & encr_types;
2374 53 : if (wps->encr_type == 0) {
2375 0 : wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2376 : "encryption types (own 0x%x Enrollee 0x%x)",
2377 0 : wps->wps->encr_types, encr_types);
2378 : #ifdef WPS_WORKAROUNDS
2379 : /*
2380 : * Some deployed implementations seem to advertise incorrect
2381 : * information in this attribute. For example, Linksys WRT350N
2382 : * seems to have a byteorder bug that breaks this negotiation.
2383 : * In order to interoperate with existing implementations,
2384 : * assume that the Enrollee supports everything we do.
2385 : */
2386 0 : wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2387 : "does not advertise supported encryption types "
2388 : "correctly");
2389 0 : wps->encr_type = wps->wps->encr_types;
2390 : #else /* WPS_WORKAROUNDS */
2391 : return -1;
2392 : #endif /* WPS_WORKAROUNDS */
2393 : }
2394 :
2395 53 : return 0;
2396 : }
2397 :
2398 :
2399 53 : static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2400 : {
2401 53 : if (conn == NULL) {
2402 0 : wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2403 : "received");
2404 0 : return -1;
2405 : }
2406 :
2407 53 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2408 53 : *conn);
2409 :
2410 53 : return 0;
2411 : }
2412 :
2413 :
2414 53 : static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2415 : {
2416 : u16 m;
2417 :
2418 53 : if (methods == NULL) {
2419 0 : wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2420 0 : return -1;
2421 : }
2422 :
2423 53 : m = WPA_GET_BE16(methods);
2424 :
2425 477 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2426 : "%s%s%s%s%s%s%s%s%s", m,
2427 53 : m & WPS_CONFIG_USBA ? " [USBA]" : "",
2428 53 : m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2429 53 : m & WPS_CONFIG_LABEL ? " [Label]" : "",
2430 53 : m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2431 53 : m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2432 53 : m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2433 53 : m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2434 53 : m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2435 53 : m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2436 :
2437 53 : if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2438 : /*
2439 : * The Enrollee does not have a display so it is unlikely to be
2440 : * able to show the passphrase to a user and as such, could
2441 : * benefit from receiving PSK to reduce key derivation time.
2442 : */
2443 0 : wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2444 : "Enrollee not supporting display");
2445 0 : wps->use_psk_key = 1;
2446 : }
2447 :
2448 53 : return 0;
2449 : }
2450 :
2451 :
2452 53 : static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2453 : {
2454 53 : if (state == NULL) {
2455 0 : wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2456 : "received");
2457 0 : return -1;
2458 : }
2459 :
2460 53 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2461 53 : *state);
2462 :
2463 53 : return 0;
2464 : }
2465 :
2466 :
2467 53 : static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2468 : {
2469 : u16 a;
2470 :
2471 53 : if (assoc == NULL) {
2472 0 : wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2473 0 : return -1;
2474 : }
2475 :
2476 53 : a = WPA_GET_BE16(assoc);
2477 53 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2478 :
2479 53 : return 0;
2480 : }
2481 :
2482 :
2483 53 : static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2484 : {
2485 : u16 e;
2486 :
2487 53 : if (err == NULL) {
2488 0 : wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2489 0 : return -1;
2490 : }
2491 :
2492 53 : e = WPA_GET_BE16(err);
2493 53 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2494 :
2495 53 : return 0;
2496 : }
2497 :
2498 :
2499 20 : static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2500 : {
2501 : #ifdef CONFIG_P2P
2502 : struct wps_registrar *reg = wps->wps->registrar;
2503 :
2504 : if (is_zero_ether_addr(reg->p2p_dev_addr))
2505 : return 1; /* no filtering in use */
2506 :
2507 : if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2508 : wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2509 : "filtering for PBC: expected " MACSTR " was "
2510 : MACSTR " - indicate PBC session overlap",
2511 : MAC2STR(reg->p2p_dev_addr),
2512 : MAC2STR(wps->p2p_dev_addr));
2513 : return 0;
2514 : }
2515 : #endif /* CONFIG_P2P */
2516 20 : return 1;
2517 : }
2518 :
2519 :
2520 2 : static int wps_registrar_skip_overlap(struct wps_data *wps)
2521 : {
2522 : #ifdef CONFIG_P2P
2523 : struct wps_registrar *reg = wps->wps->registrar;
2524 :
2525 : if (is_zero_ether_addr(reg->p2p_dev_addr))
2526 : return 0; /* no specific Enrollee selected */
2527 :
2528 : if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2529 : wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2530 : "Enrollee match");
2531 : return 1;
2532 : }
2533 : #endif /* CONFIG_P2P */
2534 2 : return 0;
2535 : }
2536 :
2537 :
2538 53 : static enum wps_process_res wps_process_m1(struct wps_data *wps,
2539 : struct wps_parse_attr *attr)
2540 : {
2541 53 : wpa_printf(MSG_DEBUG, "WPS: Received M1");
2542 :
2543 53 : if (wps->state != RECV_M1) {
2544 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2545 0 : "receiving M1", wps->state);
2546 0 : return WPS_FAILURE;
2547 : }
2548 :
2549 106 : if (wps_process_uuid_e(wps, attr->uuid_e) ||
2550 106 : wps_process_mac_addr(wps, attr->mac_addr) ||
2551 106 : wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2552 106 : wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2553 106 : wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2554 106 : wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2555 106 : wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2556 106 : wps_process_config_methods(wps, attr->config_methods) ||
2557 106 : wps_process_wps_state(wps, attr->wps_state) ||
2558 106 : wps_process_device_attrs(&wps->peer_dev, attr) ||
2559 106 : wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2560 106 : wps_process_assoc_state(wps, attr->assoc_state) ||
2561 106 : wps_process_dev_password_id(wps, attr->dev_password_id) ||
2562 106 : wps_process_config_error(wps, attr->config_error) ||
2563 53 : wps_process_os_version(&wps->peer_dev, attr->os_version))
2564 0 : return WPS_FAILURE;
2565 :
2566 103 : if (wps->dev_pw_id < 0x10 &&
2567 83 : wps->dev_pw_id != DEV_PW_DEFAULT &&
2568 66 : wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2569 66 : wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2570 66 : wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2571 : #ifdef CONFIG_WPS_NFC
2572 56 : wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2573 : #endif /* CONFIG_WPS_NFC */
2574 46 : (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2575 23 : !wps->wps->registrar->pbc)) {
2576 1 : wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2577 1 : wps->dev_pw_id);
2578 1 : wps->state = SEND_M2D;
2579 1 : return WPS_CONTINUE;
2580 : }
2581 :
2582 : #ifdef CONFIG_WPS_NFC
2583 101 : if (wps->dev_pw_id >= 0x10 ||
2584 49 : wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2585 : struct wps_nfc_pw_token *token;
2586 : const u8 *addr[1];
2587 : u8 hash[WPS_HASH_LEN];
2588 :
2589 26 : wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2590 26 : wps->dev_pw_id, wps->wps, wps->wps->registrar);
2591 26 : token = wps_get_nfc_pw_token(
2592 26 : &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2593 13 : if (token && token->peer_pk_hash_known) {
2594 9 : wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2595 : "Password Token");
2596 9 : dl_list_del(&token->list);
2597 9 : wps->nfc_pw_token = token;
2598 :
2599 9 : addr[0] = attr->public_key;
2600 9 : sha256_vector(1, addr, &attr->public_key_len, hash);
2601 17 : if (os_memcmp_const(hash,
2602 9 : wps->nfc_pw_token->pubkey_hash,
2603 : WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2604 1 : wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2605 : "mismatch");
2606 1 : wps->state = SEND_M2D;
2607 1 : wps->config_error =
2608 : WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2609 1 : return WPS_CONTINUE;
2610 : }
2611 4 : } else if (token) {
2612 0 : wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2613 : "Password Token (no peer PK hash)");
2614 0 : wps->nfc_pw_token = token;
2615 5 : } else if (wps->dev_pw_id >= 0x10 &&
2616 1 : wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2617 0 : wps->wps->ap_nfc_dev_pw) {
2618 0 : wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2619 : }
2620 : }
2621 : #endif /* CONFIG_WPS_NFC */
2622 :
2623 51 : if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2624 42 : if ((wps->wps->registrar->force_pbc_overlap ||
2625 20 : wps_registrar_pbc_overlap(wps->wps->registrar,
2626 40 : wps->mac_addr_e, wps->uuid_e) ||
2627 22 : !wps_registrar_p2p_dev_addr_match(wps)) &&
2628 2 : !wps_registrar_skip_overlap(wps)) {
2629 2 : wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2630 : "negotiation");
2631 2 : wps->state = SEND_M2D;
2632 2 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2633 2 : wps_pbc_overlap_event(wps->wps);
2634 2 : wps_fail_event(wps->wps, WPS_M1,
2635 : WPS_CFG_MULTIPLE_PBC_DETECTED,
2636 2 : WPS_EI_NO_ERROR, wps->mac_addr_e);
2637 2 : wps->wps->registrar->force_pbc_overlap = 1;
2638 2 : return WPS_CONTINUE;
2639 : }
2640 20 : wps_registrar_add_pbc_session(wps->wps->registrar,
2641 20 : wps->mac_addr_e, wps->uuid_e);
2642 20 : wps->pbc = 1;
2643 : }
2644 :
2645 : #ifdef WPS_WORKAROUNDS
2646 : /*
2647 : * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2648 : * passphrase format. To avoid interop issues, force PSK format to be
2649 : * used.
2650 : */
2651 98 : if (!wps->use_psk_key &&
2652 98 : wps->peer_dev.manufacturer &&
2653 49 : os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2654 0 : wps->peer_dev.model_name &&
2655 0 : os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2656 0 : wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2657 : "PSK format");
2658 0 : wps->use_psk_key = 1;
2659 : }
2660 : #endif /* WPS_WORKAROUNDS */
2661 :
2662 49 : wps->state = SEND_M2;
2663 49 : return WPS_CONTINUE;
2664 : }
2665 :
2666 :
2667 33 : static enum wps_process_res wps_process_m3(struct wps_data *wps,
2668 : const struct wpabuf *msg,
2669 : struct wps_parse_attr *attr)
2670 : {
2671 33 : wpa_printf(MSG_DEBUG, "WPS: Received M3");
2672 :
2673 33 : if (wps->state != RECV_M3) {
2674 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2675 0 : "receiving M3", wps->state);
2676 0 : wps->state = SEND_WSC_NACK;
2677 0 : return WPS_CONTINUE;
2678 : }
2679 :
2680 33 : if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2681 0 : !wps_registrar_skip_overlap(wps)) {
2682 0 : wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2683 : "session overlap");
2684 0 : wps->state = SEND_WSC_NACK;
2685 0 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2686 0 : return WPS_CONTINUE;
2687 : }
2688 :
2689 66 : if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2690 66 : wps_process_authenticator(wps, attr->authenticator, msg) ||
2691 66 : wps_process_e_hash1(wps, attr->e_hash1) ||
2692 33 : wps_process_e_hash2(wps, attr->e_hash2)) {
2693 0 : wps->state = SEND_WSC_NACK;
2694 0 : return WPS_CONTINUE;
2695 : }
2696 :
2697 33 : wps->state = SEND_M4;
2698 33 : return WPS_CONTINUE;
2699 : }
2700 :
2701 :
2702 32 : static enum wps_process_res wps_process_m5(struct wps_data *wps,
2703 : const struct wpabuf *msg,
2704 : struct wps_parse_attr *attr)
2705 : {
2706 : struct wpabuf *decrypted;
2707 : struct wps_parse_attr eattr;
2708 :
2709 32 : wpa_printf(MSG_DEBUG, "WPS: Received M5");
2710 :
2711 32 : if (wps->state != RECV_M5) {
2712 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2713 0 : "receiving M5", wps->state);
2714 0 : wps->state = SEND_WSC_NACK;
2715 0 : return WPS_CONTINUE;
2716 : }
2717 :
2718 32 : if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2719 0 : !wps_registrar_skip_overlap(wps)) {
2720 0 : wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2721 : "session overlap");
2722 0 : wps->state = SEND_WSC_NACK;
2723 0 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2724 0 : return WPS_CONTINUE;
2725 : }
2726 :
2727 64 : if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2728 32 : wps_process_authenticator(wps, attr->authenticator, msg)) {
2729 0 : wps->state = SEND_WSC_NACK;
2730 0 : return WPS_CONTINUE;
2731 : }
2732 :
2733 32 : decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2734 : attr->encr_settings_len);
2735 32 : if (decrypted == NULL) {
2736 0 : wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2737 : "Settings attribute");
2738 0 : wps->state = SEND_WSC_NACK;
2739 0 : return WPS_CONTINUE;
2740 : }
2741 :
2742 32 : if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2743 0 : wpabuf_free(decrypted);
2744 0 : wps->state = SEND_WSC_NACK;
2745 0 : return WPS_CONTINUE;
2746 : }
2747 :
2748 32 : wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2749 : "attribute");
2750 64 : if (wps_parse_msg(decrypted, &eattr) < 0 ||
2751 64 : wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2752 32 : wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2753 0 : wpabuf_free(decrypted);
2754 0 : wps->state = SEND_WSC_NACK;
2755 0 : return WPS_CONTINUE;
2756 : }
2757 32 : wpabuf_free(decrypted);
2758 :
2759 32 : wps->state = SEND_M6;
2760 32 : return WPS_CONTINUE;
2761 : }
2762 :
2763 :
2764 0 : static void wps_sta_cred_cb(struct wps_data *wps)
2765 : {
2766 : /*
2767 : * Update credential to only include a single authentication and
2768 : * encryption type in case the AP configuration includes more than one
2769 : * option.
2770 : */
2771 0 : if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2772 0 : wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2773 0 : else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2774 0 : wps->cred.auth_type = WPS_AUTH_WPAPSK;
2775 0 : if (wps->cred.encr_type & WPS_ENCR_AES)
2776 0 : wps->cred.encr_type = WPS_ENCR_AES;
2777 0 : else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2778 0 : wps->cred.encr_type = WPS_ENCR_TKIP;
2779 0 : wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2780 : "AP configuration");
2781 0 : if (wps->wps->cred_cb)
2782 0 : wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2783 0 : }
2784 :
2785 :
2786 0 : static void wps_cred_update(struct wps_credential *dst,
2787 : struct wps_credential *src)
2788 : {
2789 0 : os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2790 0 : dst->ssid_len = src->ssid_len;
2791 0 : dst->auth_type = src->auth_type;
2792 0 : dst->encr_type = src->encr_type;
2793 0 : dst->key_idx = src->key_idx;
2794 0 : os_memcpy(dst->key, src->key, sizeof(dst->key));
2795 0 : dst->key_len = src->key_len;
2796 0 : }
2797 :
2798 :
2799 31 : static int wps_process_ap_settings_r(struct wps_data *wps,
2800 : struct wps_parse_attr *attr)
2801 : {
2802 : struct wpabuf *msg;
2803 :
2804 31 : if (wps->wps->ap || wps->er)
2805 31 : return 0;
2806 :
2807 : /* AP Settings Attributes in M7 when Enrollee is an AP */
2808 0 : if (wps_process_ap_settings(attr, &wps->cred) < 0)
2809 0 : return -1;
2810 :
2811 0 : wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2812 :
2813 0 : if (wps->new_ap_settings) {
2814 0 : wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2815 : "new settings");
2816 0 : wps_cred_update(&wps->cred, wps->new_ap_settings);
2817 0 : return 0;
2818 : } else {
2819 : /*
2820 : * Use the AP PIN only to receive the current AP settings, not
2821 : * to reconfigure the AP.
2822 : */
2823 :
2824 : /*
2825 : * Clear selected registrar here since we do not get to
2826 : * WSC_Done in this protocol run.
2827 : */
2828 0 : wps_registrar_pin_completed(wps->wps->registrar);
2829 :
2830 0 : msg = wps_build_ap_cred(wps);
2831 0 : if (msg == NULL)
2832 0 : return -1;
2833 0 : wps->cred.cred_attr = wpabuf_head(msg);
2834 0 : wps->cred.cred_attr_len = wpabuf_len(msg);
2835 :
2836 0 : if (wps->ap_settings_cb) {
2837 0 : wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2838 0 : &wps->cred);
2839 0 : wpabuf_free(msg);
2840 0 : return 1;
2841 : }
2842 0 : wps_sta_cred_cb(wps);
2843 :
2844 0 : wps->cred.cred_attr = NULL;
2845 0 : wps->cred.cred_attr_len = 0;
2846 0 : wpabuf_free(msg);
2847 :
2848 0 : return 1;
2849 : }
2850 : }
2851 :
2852 :
2853 31 : static enum wps_process_res wps_process_m7(struct wps_data *wps,
2854 : const struct wpabuf *msg,
2855 : struct wps_parse_attr *attr)
2856 : {
2857 : struct wpabuf *decrypted;
2858 : struct wps_parse_attr eattr;
2859 :
2860 31 : wpa_printf(MSG_DEBUG, "WPS: Received M7");
2861 :
2862 31 : if (wps->state != RECV_M7) {
2863 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2864 0 : "receiving M7", wps->state);
2865 0 : wps->state = SEND_WSC_NACK;
2866 0 : return WPS_CONTINUE;
2867 : }
2868 :
2869 31 : if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2870 0 : !wps_registrar_skip_overlap(wps)) {
2871 0 : wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2872 : "session overlap");
2873 0 : wps->state = SEND_WSC_NACK;
2874 0 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2875 0 : return WPS_CONTINUE;
2876 : }
2877 :
2878 62 : if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2879 31 : wps_process_authenticator(wps, attr->authenticator, msg)) {
2880 0 : wps->state = SEND_WSC_NACK;
2881 0 : return WPS_CONTINUE;
2882 : }
2883 :
2884 31 : decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2885 : attr->encr_settings_len);
2886 31 : if (decrypted == NULL) {
2887 0 : wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2888 : "Settings attribute");
2889 0 : wps->state = SEND_WSC_NACK;
2890 0 : return WPS_CONTINUE;
2891 : }
2892 :
2893 31 : if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2894 31 : attr->version2 != NULL) < 0) {
2895 0 : wpabuf_free(decrypted);
2896 0 : wps->state = SEND_WSC_NACK;
2897 0 : return WPS_CONTINUE;
2898 : }
2899 :
2900 31 : wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2901 : "attribute");
2902 62 : if (wps_parse_msg(decrypted, &eattr) < 0 ||
2903 62 : wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2904 62 : wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2905 31 : wps_process_ap_settings_r(wps, &eattr)) {
2906 0 : wpabuf_free(decrypted);
2907 0 : wps->state = SEND_WSC_NACK;
2908 0 : return WPS_CONTINUE;
2909 : }
2910 :
2911 31 : wpabuf_free(decrypted);
2912 :
2913 31 : wps->state = SEND_M8;
2914 31 : return WPS_CONTINUE;
2915 : }
2916 :
2917 :
2918 149 : static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2919 : const struct wpabuf *msg)
2920 : {
2921 : struct wps_parse_attr attr;
2922 149 : enum wps_process_res ret = WPS_CONTINUE;
2923 :
2924 149 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2925 :
2926 149 : if (wps_parse_msg(msg, &attr) < 0)
2927 0 : return WPS_FAILURE;
2928 :
2929 149 : if (attr.msg_type == NULL) {
2930 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2931 0 : wps->state = SEND_WSC_NACK;
2932 0 : return WPS_CONTINUE;
2933 : }
2934 :
2935 245 : if (*attr.msg_type != WPS_M1 &&
2936 192 : (attr.registrar_nonce == NULL ||
2937 96 : os_memcmp(wps->nonce_r, attr.registrar_nonce,
2938 : WPS_NONCE_LEN) != 0)) {
2939 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2940 0 : return WPS_FAILURE;
2941 : }
2942 :
2943 149 : switch (*attr.msg_type) {
2944 : case WPS_M1:
2945 53 : if (wps_validate_m1(msg) < 0)
2946 0 : return WPS_FAILURE;
2947 : #ifdef CONFIG_WPS_UPNP
2948 53 : if (wps->wps->wps_upnp && attr.mac_addr) {
2949 : /* Remove old pending messages when starting new run */
2950 8 : wps_free_pending_msgs(wps->wps->upnp_msgs);
2951 8 : wps->wps->upnp_msgs = NULL;
2952 :
2953 16 : upnp_wps_device_send_wlan_event(
2954 8 : wps->wps->wps_upnp, attr.mac_addr,
2955 : UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2956 : }
2957 : #endif /* CONFIG_WPS_UPNP */
2958 53 : ret = wps_process_m1(wps, &attr);
2959 53 : break;
2960 : case WPS_M3:
2961 33 : if (wps_validate_m3(msg) < 0)
2962 0 : return WPS_FAILURE;
2963 33 : ret = wps_process_m3(wps, msg, &attr);
2964 33 : if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2965 0 : wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2966 0 : wps->error_indication, wps->mac_addr_e);
2967 33 : break;
2968 : case WPS_M5:
2969 32 : if (wps_validate_m5(msg) < 0)
2970 0 : return WPS_FAILURE;
2971 32 : ret = wps_process_m5(wps, msg, &attr);
2972 32 : if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2973 0 : wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2974 0 : wps->error_indication, wps->mac_addr_e);
2975 32 : break;
2976 : case WPS_M7:
2977 31 : if (wps_validate_m7(msg) < 0)
2978 0 : return WPS_FAILURE;
2979 31 : ret = wps_process_m7(wps, msg, &attr);
2980 31 : if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2981 0 : wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2982 0 : wps->error_indication, wps->mac_addr_e);
2983 31 : break;
2984 : default:
2985 0 : wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2986 0 : *attr.msg_type);
2987 0 : return WPS_FAILURE;
2988 : }
2989 :
2990 149 : if (ret == WPS_CONTINUE) {
2991 : /* Save a copy of the last message for Authenticator derivation
2992 : */
2993 149 : wpabuf_free(wps->last_msg);
2994 149 : wps->last_msg = wpabuf_dup(msg);
2995 : }
2996 :
2997 149 : return ret;
2998 : }
2999 :
3000 :
3001 21 : static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
3002 : const struct wpabuf *msg)
3003 : {
3004 : struct wps_parse_attr attr;
3005 :
3006 21 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
3007 :
3008 21 : if (wps_parse_msg(msg, &attr) < 0)
3009 0 : return WPS_FAILURE;
3010 :
3011 21 : if (attr.msg_type == NULL) {
3012 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3013 0 : return WPS_FAILURE;
3014 : }
3015 :
3016 21 : if (*attr.msg_type != WPS_WSC_ACK) {
3017 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3018 0 : *attr.msg_type);
3019 0 : return WPS_FAILURE;
3020 : }
3021 :
3022 : #ifdef CONFIG_WPS_UPNP
3023 30 : if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3024 9 : upnp_wps_subscribers(wps->wps->wps_upnp)) {
3025 9 : if (wps->wps->upnp_msgs)
3026 8 : return WPS_CONTINUE;
3027 1 : wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3028 : "external Registrar");
3029 1 : return WPS_PENDING;
3030 : }
3031 : #endif /* CONFIG_WPS_UPNP */
3032 :
3033 24 : if (attr.registrar_nonce == NULL ||
3034 12 : os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3035 : {
3036 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3037 0 : return WPS_FAILURE;
3038 : }
3039 :
3040 24 : if (attr.enrollee_nonce == NULL ||
3041 12 : os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3042 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3043 0 : return WPS_FAILURE;
3044 : }
3045 :
3046 12 : if (wps->state == RECV_M2D_ACK) {
3047 : #ifdef CONFIG_WPS_UPNP
3048 20 : if (wps->wps->wps_upnp &&
3049 8 : upnp_wps_subscribers(wps->wps->wps_upnp)) {
3050 8 : if (wps->wps->upnp_msgs)
3051 0 : return WPS_CONTINUE;
3052 8 : if (wps->ext_reg == 0)
3053 8 : wps->ext_reg = 1;
3054 8 : wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3055 : "external Registrar");
3056 8 : return WPS_PENDING;
3057 : }
3058 : #endif /* CONFIG_WPS_UPNP */
3059 :
3060 4 : wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3061 : "terminate negotiation");
3062 : }
3063 :
3064 4 : return WPS_FAILURE;
3065 : }
3066 :
3067 :
3068 5 : static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3069 : const struct wpabuf *msg)
3070 : {
3071 : struct wps_parse_attr attr;
3072 : int old_state;
3073 : u16 config_error;
3074 :
3075 5 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3076 :
3077 5 : old_state = wps->state;
3078 5 : wps->state = SEND_WSC_NACK;
3079 :
3080 5 : if (wps_parse_msg(msg, &attr) < 0)
3081 0 : return WPS_FAILURE;
3082 :
3083 5 : if (attr.msg_type == NULL) {
3084 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3085 0 : return WPS_FAILURE;
3086 : }
3087 :
3088 5 : if (*attr.msg_type != WPS_WSC_NACK) {
3089 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3090 0 : *attr.msg_type);
3091 0 : return WPS_FAILURE;
3092 : }
3093 :
3094 : #ifdef CONFIG_WPS_UPNP
3095 5 : if (wps->wps->wps_upnp && wps->ext_reg) {
3096 1 : wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3097 : "Registrar terminated by the Enrollee");
3098 1 : return WPS_FAILURE;
3099 : }
3100 : #endif /* CONFIG_WPS_UPNP */
3101 :
3102 8 : if (attr.registrar_nonce == NULL ||
3103 4 : os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3104 : {
3105 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3106 0 : return WPS_FAILURE;
3107 : }
3108 :
3109 8 : if (attr.enrollee_nonce == NULL ||
3110 4 : os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3111 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3112 0 : return WPS_FAILURE;
3113 : }
3114 :
3115 4 : if (attr.config_error == NULL) {
3116 0 : wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3117 : "in WSC_NACK");
3118 0 : return WPS_FAILURE;
3119 : }
3120 :
3121 4 : config_error = WPA_GET_BE16(attr.config_error);
3122 4 : wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3123 : "Configuration Error %d", config_error);
3124 :
3125 4 : switch (old_state) {
3126 : case RECV_M3:
3127 0 : wps_fail_event(wps->wps, WPS_M2, config_error,
3128 0 : wps->error_indication, wps->mac_addr_e);
3129 0 : break;
3130 : case RECV_M5:
3131 1 : wps_fail_event(wps->wps, WPS_M4, config_error,
3132 1 : wps->error_indication, wps->mac_addr_e);
3133 1 : break;
3134 : case RECV_M7:
3135 1 : wps_fail_event(wps->wps, WPS_M6, config_error,
3136 1 : wps->error_indication, wps->mac_addr_e);
3137 1 : break;
3138 : case RECV_DONE:
3139 2 : wps_fail_event(wps->wps, WPS_M8, config_error,
3140 2 : wps->error_indication, wps->mac_addr_e);
3141 2 : break;
3142 : default:
3143 0 : break;
3144 : }
3145 :
3146 4 : return WPS_FAILURE;
3147 : }
3148 :
3149 :
3150 41 : static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3151 : const struct wpabuf *msg)
3152 : {
3153 : struct wps_parse_attr attr;
3154 :
3155 41 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3156 :
3157 47 : if (wps->state != RECV_DONE &&
3158 12 : (!wps->wps->wps_upnp || !wps->ext_reg)) {
3159 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3160 0 : "receiving WSC_Done", wps->state);
3161 0 : return WPS_FAILURE;
3162 : }
3163 :
3164 41 : if (wps_parse_msg(msg, &attr) < 0)
3165 0 : return WPS_FAILURE;
3166 :
3167 41 : if (attr.msg_type == NULL) {
3168 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3169 0 : return WPS_FAILURE;
3170 : }
3171 :
3172 41 : if (*attr.msg_type != WPS_WSC_DONE) {
3173 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3174 0 : *attr.msg_type);
3175 0 : return WPS_FAILURE;
3176 : }
3177 :
3178 : #ifdef CONFIG_WPS_UPNP
3179 41 : if (wps->wps->wps_upnp && wps->ext_reg) {
3180 6 : wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3181 : "Registrar completed successfully");
3182 6 : wps_device_store(wps->wps->registrar, &wps->peer_dev,
3183 6 : wps->uuid_e);
3184 6 : return WPS_DONE;
3185 : }
3186 : #endif /* CONFIG_WPS_UPNP */
3187 :
3188 70 : if (attr.registrar_nonce == NULL ||
3189 35 : os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3190 : {
3191 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3192 0 : return WPS_FAILURE;
3193 : }
3194 :
3195 70 : if (attr.enrollee_nonce == NULL ||
3196 35 : os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3197 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3198 0 : return WPS_FAILURE;
3199 : }
3200 :
3201 35 : wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3202 35 : wps_device_store(wps->wps->registrar, &wps->peer_dev,
3203 35 : wps->uuid_e);
3204 :
3205 41 : if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3206 12 : wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3207 : struct wps_credential cred;
3208 :
3209 6 : wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3210 : "on first Enrollee connection");
3211 :
3212 6 : os_memset(&cred, 0, sizeof(cred));
3213 6 : os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3214 6 : cred.ssid_len = wps->wps->ssid_len;
3215 6 : cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3216 6 : cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3217 6 : os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3218 6 : cred.key_len = wps->new_psk_len;
3219 :
3220 6 : wps->wps->wps_state = WPS_STATE_CONFIGURED;
3221 12 : wpa_hexdump_ascii_key(MSG_DEBUG,
3222 : "WPS: Generated random passphrase",
3223 6 : wps->new_psk, wps->new_psk_len);
3224 6 : if (wps->wps->cred_cb)
3225 6 : wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3226 :
3227 6 : os_free(wps->new_psk);
3228 6 : wps->new_psk = NULL;
3229 : }
3230 :
3231 35 : if (!wps->wps->ap && !wps->er)
3232 0 : wps_sta_cred_cb(wps);
3233 :
3234 35 : if (wps->new_psk) {
3235 8 : if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3236 4 : wps->p2p_dev_addr, wps->new_psk,
3237 : wps->new_psk_len)) {
3238 2 : wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3239 : "new PSK");
3240 : }
3241 4 : os_free(wps->new_psk);
3242 4 : wps->new_psk = NULL;
3243 : }
3244 :
3245 70 : wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3246 35 : wps->dev_password, wps->dev_password_len);
3247 :
3248 35 : if (wps->pbc) {
3249 19 : wps_registrar_remove_pbc_session(wps->wps->registrar,
3250 19 : wps->uuid_e,
3251 19 : wps->p2p_dev_addr);
3252 19 : wps_registrar_pbc_completed(wps->wps->registrar);
3253 : #ifdef WPS_WORKAROUNDS
3254 19 : os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3255 : #endif /* WPS_WORKAROUNDS */
3256 19 : os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3257 : WPS_UUID_LEN);
3258 : } else {
3259 16 : wps_registrar_pin_completed(wps->wps->registrar);
3260 : }
3261 : /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3262 : * merge them into APs own list.. */
3263 :
3264 35 : wps_success_event(wps->wps, wps->mac_addr_e);
3265 :
3266 35 : return WPS_DONE;
3267 : }
3268 :
3269 :
3270 246 : enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3271 : enum wsc_op_code op_code,
3272 : const struct wpabuf *msg)
3273 : {
3274 : enum wps_process_res ret;
3275 :
3276 246 : wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3277 : "op_code=%d)",
3278 : (unsigned long) wpabuf_len(msg), op_code);
3279 :
3280 : #ifdef CONFIG_WPS_UPNP
3281 246 : if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3282 : struct wps_parse_attr attr;
3283 10 : if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3284 5 : *attr.msg_type == WPS_M3)
3285 5 : wps->ext_reg = 2; /* past M2/M2D phase */
3286 : }
3287 246 : if (wps->ext_reg > 1)
3288 35 : wps_registrar_free_pending_m2(wps->wps);
3289 292 : if (wps->wps->wps_upnp && wps->ext_reg &&
3290 69 : wps->wps->upnp_msgs == NULL &&
3291 8 : (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3292 7 : {
3293 : struct wps_parse_attr attr;
3294 : int type;
3295 22 : if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3296 0 : type = -1;
3297 : else
3298 22 : type = *attr.msg_type;
3299 22 : wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3300 : " to external Registrar for processing", type);
3301 22 : upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3302 22 : wps->mac_addr_e,
3303 : UPNP_WPS_WLANEVENT_TYPE_EAP,
3304 : msg);
3305 22 : if (op_code == WSC_MSG)
3306 15 : return WPS_PENDING;
3307 224 : } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3308 15 : wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3309 : "external Registrar");
3310 15 : return WPS_CONTINUE;
3311 : }
3312 : #endif /* CONFIG_WPS_UPNP */
3313 :
3314 216 : switch (op_code) {
3315 : case WSC_MSG:
3316 149 : return wps_process_wsc_msg(wps, msg);
3317 : case WSC_ACK:
3318 21 : if (wps_validate_wsc_ack(msg) < 0)
3319 0 : return WPS_FAILURE;
3320 21 : return wps_process_wsc_ack(wps, msg);
3321 : case WSC_NACK:
3322 5 : if (wps_validate_wsc_nack(msg) < 0)
3323 0 : return WPS_FAILURE;
3324 5 : return wps_process_wsc_nack(wps, msg);
3325 : case WSC_Done:
3326 41 : if (wps_validate_wsc_done(msg) < 0)
3327 0 : return WPS_FAILURE;
3328 41 : ret = wps_process_wsc_done(wps, msg);
3329 41 : if (ret == WPS_FAILURE) {
3330 0 : wps->state = SEND_WSC_NACK;
3331 0 : wps_fail_event(wps->wps, WPS_WSC_DONE,
3332 0 : wps->config_error,
3333 0 : wps->error_indication, wps->mac_addr_e);
3334 : }
3335 41 : return ret;
3336 : default:
3337 0 : wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3338 0 : return WPS_FAILURE;
3339 : }
3340 : }
3341 :
3342 :
3343 25 : int wps_registrar_update_ie(struct wps_registrar *reg)
3344 : {
3345 25 : return wps_set_ie(reg);
3346 : }
3347 :
3348 :
3349 0 : static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3350 : void *timeout_ctx)
3351 : {
3352 0 : struct wps_registrar *reg = eloop_ctx;
3353 :
3354 0 : wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3355 : "unselect internal Registrar");
3356 0 : reg->selected_registrar = 0;
3357 0 : reg->pbc = 0;
3358 0 : wps_registrar_selected_registrar_changed(reg, 0);
3359 0 : }
3360 :
3361 :
3362 : #ifdef CONFIG_WPS_UPNP
3363 12 : static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3364 : struct subscription *s)
3365 : {
3366 : int i, j;
3367 24 : wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3368 : "config_methods=0x%x)",
3369 24 : s->dev_password_id, s->config_methods);
3370 12 : reg->sel_reg_union = 1;
3371 12 : if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3372 12 : reg->sel_reg_dev_password_id_override = s->dev_password_id;
3373 12 : if (reg->sel_reg_config_methods_override == -1)
3374 12 : reg->sel_reg_config_methods_override = 0;
3375 12 : reg->sel_reg_config_methods_override |= s->config_methods;
3376 12 : for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3377 12 : if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3378 12 : break;
3379 36 : for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3380 12 : j++) {
3381 24 : if (is_zero_ether_addr(s->authorized_macs[j]))
3382 12 : break;
3383 72 : wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3384 72 : MACSTR, MAC2STR(s->authorized_macs[j]));
3385 12 : os_memcpy(reg->authorized_macs_union[i],
3386 : s->authorized_macs[j], ETH_ALEN);
3387 12 : i++;
3388 : }
3389 12 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3390 12 : (u8 *) reg->authorized_macs_union,
3391 : sizeof(reg->authorized_macs_union));
3392 12 : }
3393 : #endif /* CONFIG_WPS_UPNP */
3394 :
3395 :
3396 141 : static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3397 : {
3398 : #ifdef CONFIG_WPS_UPNP
3399 : struct subscription *s;
3400 :
3401 141 : if (reg->wps->wps_upnp == NULL)
3402 253 : return;
3403 :
3404 47 : dl_list_for_each(s, ®->wps->wps_upnp->subscriptions,
3405 : struct subscription, list) {
3406 : struct subscr_addr *sa;
3407 18 : sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3408 18 : if (sa) {
3409 18 : wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3410 : inet_ntoa(sa->saddr.sin_addr),
3411 18 : ntohs(sa->saddr.sin_port));
3412 : }
3413 18 : if (s->selected_registrar)
3414 12 : wps_registrar_sel_reg_add(reg, s);
3415 : else
3416 6 : wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3417 : "selected");
3418 : }
3419 : #endif /* CONFIG_WPS_UPNP */
3420 : }
3421 :
3422 :
3423 : /**
3424 : * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3425 : * @reg: Registrar data from wps_registrar_init()
3426 : *
3427 : * This function is called when selected registrar state changes, e.g., when an
3428 : * AP receives a SetSelectedRegistrar UPnP message.
3429 : */
3430 141 : void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3431 : u16 dev_pw_id)
3432 : {
3433 141 : wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3434 :
3435 141 : reg->sel_reg_union = reg->selected_registrar;
3436 141 : reg->sel_reg_dev_password_id_override = -1;
3437 141 : reg->sel_reg_config_methods_override = -1;
3438 141 : os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3439 : WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3440 141 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3441 141 : (u8 *) reg->authorized_macs_union,
3442 : sizeof(reg->authorized_macs_union));
3443 141 : if (reg->selected_registrar) {
3444 : u16 methods;
3445 :
3446 63 : methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3447 63 : methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3448 : WPS_CONFIG_PHY_PUSHBUTTON);
3449 63 : if (reg->pbc) {
3450 27 : reg->sel_reg_dev_password_id_override =
3451 : DEV_PW_PUSHBUTTON;
3452 27 : wps_set_pushbutton(&methods, reg->wps->config_methods);
3453 36 : } else if (dev_pw_id)
3454 9 : reg->sel_reg_dev_password_id_override = dev_pw_id;
3455 63 : wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3456 : "(pbc=%d)", reg->pbc);
3457 63 : reg->sel_reg_config_methods_override = methods;
3458 : } else
3459 78 : wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3460 :
3461 141 : wps_registrar_sel_reg_union(reg);
3462 :
3463 141 : wps_set_ie(reg);
3464 141 : wps_cb_set_sel_reg(reg);
3465 141 : }
3466 :
3467 :
3468 3 : int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3469 : char *buf, size_t buflen)
3470 : {
3471 : struct wps_registrar_device *d;
3472 3 : int len = 0, ret;
3473 : char uuid[40];
3474 : char devtype[WPS_DEV_TYPE_BUFSIZE];
3475 :
3476 3 : d = wps_device_get(reg, addr);
3477 3 : if (d == NULL)
3478 0 : return 0;
3479 3 : if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3480 0 : return 0;
3481 :
3482 18 : ret = os_snprintf(buf + len, buflen - len,
3483 : "wpsUuid=%s\n"
3484 : "wpsPrimaryDeviceType=%s\n"
3485 : "wpsDeviceName=%s\n"
3486 : "wpsManufacturer=%s\n"
3487 : "wpsModelName=%s\n"
3488 : "wpsModelNumber=%s\n"
3489 : "wpsSerialNumber=%s\n",
3490 : uuid,
3491 3 : wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3492 : sizeof(devtype)),
3493 3 : d->dev.device_name ? d->dev.device_name : "",
3494 3 : d->dev.manufacturer ? d->dev.manufacturer : "",
3495 3 : d->dev.model_name ? d->dev.model_name : "",
3496 3 : d->dev.model_number ? d->dev.model_number : "",
3497 3 : d->dev.serial_number ? d->dev.serial_number : "");
3498 3 : if (ret < 0 || (size_t) ret >= buflen - len)
3499 0 : return len;
3500 3 : len += ret;
3501 :
3502 3 : return len;
3503 : }
3504 :
3505 :
3506 2 : int wps_registrar_config_ap(struct wps_registrar *reg,
3507 : struct wps_credential *cred)
3508 : {
3509 2 : wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3510 2 : if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3511 : WPS_ENCR_AES))) {
3512 0 : if (cred->encr_type & WPS_ENCR_WEP) {
3513 0 : wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3514 : "due to WEP configuration");
3515 0 : return -1;
3516 : }
3517 :
3518 0 : wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3519 0 : "invalid encr_type 0x%x", cred->encr_type);
3520 0 : return -1;
3521 : }
3522 :
3523 2 : if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3524 : WPS_ENCR_TKIP) {
3525 0 : wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3526 : "TKIP+AES");
3527 0 : cred->encr_type |= WPS_ENCR_AES;
3528 : }
3529 :
3530 2 : if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3531 : WPS_AUTH_WPAPSK) {
3532 0 : wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3533 : "WPAPSK+WPA2PSK");
3534 0 : cred->auth_type |= WPS_AUTH_WPA2PSK;
3535 : }
3536 :
3537 2 : if (reg->wps->cred_cb)
3538 2 : return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3539 :
3540 0 : return -1;
3541 : }
3542 :
3543 :
3544 : #ifdef CONFIG_WPS_NFC
3545 :
3546 9 : int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3547 : const u8 *pubkey_hash, u16 pw_id,
3548 : const u8 *dev_pw, size_t dev_pw_len,
3549 : int pk_hash_provided_oob)
3550 : {
3551 : struct wps_nfc_pw_token *token;
3552 :
3553 9 : if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3554 0 : return -1;
3555 :
3556 9 : if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3557 7 : (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3558 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3559 : "addition - missing public key hash");
3560 0 : return -1;
3561 : }
3562 :
3563 9 : wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id);
3564 :
3565 9 : token = os_zalloc(sizeof(*token));
3566 9 : if (token == NULL)
3567 0 : return -1;
3568 :
3569 9 : token->peer_pk_hash_known = pubkey_hash != NULL;
3570 9 : if (pubkey_hash)
3571 9 : os_memcpy(token->pubkey_hash, pubkey_hash,
3572 : WPS_OOB_PUBKEY_HASH_LEN);
3573 9 : token->pw_id = pw_id;
3574 9 : token->pk_hash_provided_oob = pk_hash_provided_oob;
3575 9 : if (dev_pw) {
3576 2 : wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3577 : sizeof(token->dev_pw),
3578 : dev_pw, dev_pw_len);
3579 2 : token->dev_pw_len = dev_pw_len * 2;
3580 : }
3581 :
3582 9 : dl_list_add(®->nfc_pw_tokens, &token->list);
3583 :
3584 9 : reg->selected_registrar = 1;
3585 9 : reg->pbc = 0;
3586 9 : wps_registrar_add_authorized_mac(reg,
3587 : (u8 *) "\xff\xff\xff\xff\xff\xff");
3588 9 : wps_registrar_selected_registrar_changed(reg, pw_id);
3589 9 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3590 9 : eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3591 : wps_registrar_set_selected_timeout,
3592 : reg, NULL);
3593 :
3594 9 : wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3595 : pw_id);
3596 :
3597 9 : return 0;
3598 : }
3599 :
3600 :
3601 2 : int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3602 : const u8 *oob_dev_pw,
3603 : size_t oob_dev_pw_len)
3604 : {
3605 : const u8 *pos, *hash, *dev_pw;
3606 : u16 id;
3607 : size_t dev_pw_len;
3608 :
3609 2 : if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3610 : oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3611 : WPS_OOB_DEVICE_PASSWORD_LEN)
3612 0 : return -1;
3613 :
3614 2 : hash = oob_dev_pw;
3615 2 : pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3616 2 : id = WPA_GET_BE16(pos);
3617 2 : dev_pw = pos + 2;
3618 2 : dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3619 :
3620 2 : wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3621 : id);
3622 :
3623 2 : wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3624 : hash, WPS_OOB_PUBKEY_HASH_LEN);
3625 2 : wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3626 :
3627 2 : return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3628 : dev_pw_len, 0);
3629 : }
3630 :
3631 :
3632 9 : void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3633 : struct wps_nfc_pw_token *token)
3634 : {
3635 9 : wps_registrar_remove_authorized_mac(reg,
3636 : (u8 *) "\xff\xff\xff\xff\xff\xff");
3637 9 : wps_registrar_selected_registrar_changed(reg, 0);
3638 :
3639 : /*
3640 : * Free the NFC password token if it was used only for a single protocol
3641 : * run. The static handover case uses the same password token multiple
3642 : * times, so do not free that case here.
3643 : */
3644 9 : if (token->peer_pk_hash_known)
3645 9 : os_free(token);
3646 9 : }
3647 :
3648 : #endif /* CONFIG_WPS_NFC */
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